2016年12月29日星期四
The Ten Points of Attention in Installation of Vibration Isolator for Water Pump
1, vibration isolation components should be symmetrical to the pump unit axis layout. The rubber vibration-isolating pad may be arranged in a clockwise direction or a counterclockwise direction.
2, when the unit vibration isolation elements with six support points, four of which are arranged in the inert block or steel frame four corners, the other two should be set in the long side line, and adjust its position, so that the vibration component compression deformation Keep it as consistent as possible.
3, horizontal vibration isolation unit installed vibration isolation rubber dampers or damped spring isolator, under normal circumstances, the rubber vibration isolator and damping spring isolator and the ground, and between the inert block or steel frame without Bonded or fixed.
4, vertical vibration isolation vibration pump unit installed in the use of rubber isolators, the pump unit under the base, should set the steel frame and the use of anchor installation; steel frame and rubber isolator between the application of bolts (additional spring washers )fixed. In the ground or floor set in the anchor bolts, rubber vibration through the anchor bolts after the fixed on the ground or floor. The Ten Points of Attention in Installation of Vibration Isolator for Water Pump
5, the edge of the rubber vibration pad shall not exceed the edge of the inert block; steel frame bearing area should not be less than the top of the vibration bearing support area. In this case,
6, single-layer rubber vibration isolation pad layout, the frequency ratio can not meet the requirements, can be arranged in multiple layers, but the vibration isolation layer should not be more than five layers. Set the series of rubber vibration isolation pad, the model, the number of blocks, area and rubber hardness should be completely consistent.
6, single-layer rubber vibration isolation pad layout, the frequency ratio can not meet the requirements, can be arranged in multiple layers, but the vibration isolation layer should not be more than five layers. Set the series of rubber vibration isolation pad, the model, the number of blocks, area and rubber hardness should be completely consistent.
7, rubber vibration isolation mat multi-layer set, the isolation between each layer with a thickness of not less than 4mm galvanized steel plate separated, steel plate should be flat, it plate and the application of adhesive adhesive plate. Galvanized steel plate plane size should be greater than each end of the rubber vibration pad 10mm. Galvanized steel sheet, the lower bonding rubber vibration pads should be staggered set.
8, the construction before installation, should be promptly checked, the installation should be so that vibration isolation components of the static compression deformation shall not exceed the maximum allowable value.
9, the pump unit installed, the installation of the water pump unit supporting the ground level, and should have sufficient carrying capacity.
10, the unit vibration isolation components should avoid acid, alkali and organic solvents and other substances in contact.
Submersible pump maintenance common sense
The use of submersible pumps in the process, we must pay attention to maintaining good submersible pump, any machine is the same, long-term use will make the machine aging, and maintenance work can make the machine slows down the aging, allowing the machine to work longer time.
Submersible pumps should be how to maintain it?
First, use a suitable lubricant. Different types of submersible pumps are suitable for use with different lubricants. In the purchase of submersible pumps, it is best to buy the necessary supporting the use of lubricants. And the lubricating oil is preferably selected to be low-viscosity water-insoluble.
Second, the regular inspection of submersible pumps, if found to have faults, it should be promptly dealt with. But if not in the line, do not disassemble yourself, otherwise it is easy to damage to the original parts are not bad. Should look for experienced professionals to repair.
Finally, if the submersible pump is not used for a long time, it should be pumped away from the water, but also emptying the pump water, especially in the winter to do more to pay attention to these tasks. But also in the key parts of the machine coated with butter, bearing lubricating oil on the machine to avoid rust and affect the future use.
2016年12月28日星期三
Application of farmland irrigation and drainage pump
The company is used for agricultural irrigation and drainage of the pump, known as farmland irrigation and agricultural pump. Farmland irrigation and drainage pump in agricultural production has an important position and role. Pump is a mechanical energy into the kinetic energy of the liquid kinetic energy, pressure energy, so that the liquid transported to high or distant machinery. It has three important functions of lifting liquid, conveying liquid and pressurizing liquid. It is one of the most widely used machinery in national economy. It involves almost everything from people’s life to national economic construction.
China’s vast land, extremely complex geographical conditions, from the southeast coastal plains to the Northwest Plateau, the need for a variety of pumps to modern agriculture
Production services.
China’s vast land, extremely complex geographical conditions, from the southeast coastal plains to the Northwest Plateau, the need for a variety of pumps to modern agriculture
Production services.
Such as:
(1) in China’s southeast coast, the middle and lower reaches of the Yellow River, the Yangtze River and the vast plains of the lake, the need for large areas of drainage and irrigation. This requires the use of some large flow, low lift large, medium-sized axial flow pump.
(1) in China’s southeast coast, the middle and lower reaches of the Yellow River, the Yangtze River and the vast plains of the lake, the need for large areas of drainage and irrigation. This requires the use of some large flow, low lift large, medium-sized axial flow pump.
(2) in the Northwest Plateau and hilly areas, the need to use some high-head single-stage centrifugal pump or multi-stage centrifugal pump to raise water for irrigation.
(3) In many parts of the north of China, rivers and lakes are few, rainfall is too little, and the irrigation season is the dry season of the river. Therefore, it is very unreliable to rely on surface water for agricultural irrigation. But these areas are rich in groundwater, water quality Ye Hao. In order to meet the growing needs of agricultural water, a large number of wells can be developed underground
water. At this time the general well pump (such as deep well pump, submersible sewage pump, etc.) to extract groundwater irrigation of farmland.
water. At this time the general well pump (such as deep well pump, submersible sewage pump, etc.) to extract groundwater irrigation of farmland.
(4) China is a serious shortage of water resources in the country, in order to save farmland irrigation water, is now gradually popularize the promotion of irrigation, drip irrigation and other water-saving irrigation technology. At this time the general use of sprinkler pump (such as self-priming centrifugal pump, small high-pressure pump, etc.) to achieve.
2016年12月23日星期五
High temperature heat pump environmental characteristics
What are the environmental characteristics of high temperature heat pump?
First, the rapid transmission, Moreover, wood noise, the failure rate than other pumps to be small, there are sub-chanting at 50 or so, the impact on the control engineer is relatively small.
Second, there will be no small turbine capacity, in the process of running the media need not worry about the media will flow out and is showing other situations.
Third, the use of stainless steel as the basic material of the pump, the use of time is very efficient. According to the professional description, high-temperature heat pump inside and outside the roller material is the same, so the use of stainless steel for the pump the basic material, and therefore the use of time than other pumps.
4, can be configured in the transmission sealing requirements of the media.
Under normal circumstances, the sealing requirements of the media need to be used to implement the delivery of peculiar tools, and high-temperature heat pump is not. As long as the choice of the right parts, Botou City Taibang valve can transport the sealing requirements of the medium, but also for different nature of the liquid, so the production is particularly convenient, but also for manufacturers to save some money.
2016年12月22日星期四
Swimming pool water pump blockage
Summer swimming pool the best place, the safety and health of the swimming pool is also increasingly important. Swimming pool water pump blockage, how to deal with it?
Why swimming pool anti-blocking performance more and more attention, there are two main reasons: First, the increase in the cost of swimming pool water treatment. Industrial enterprises are working to reduce the water consumption per unit of product, which makes the sewage solids and fiber content is getting higher and higher. Second, more and more use of sewage pump energy-saving means, is to adjust the speed of the drive, and speed regulation can not guarantee that the pool will not plug the pump.
For frequent impurity impeller pump impeller problems, the initial operation of the swimming pool equipment will be used every block, clearing the night, but the method of clearing. Although this avoids downtime, but often disassemble the pump, resulting in parts and other parts of the pump pump ring increased wear and tear at the same time each time a lot of manpower. To change this situation, in the pump inlet pipe installed at the carbon steel anti-fouling box, and a 45-degree angle. Use a filter inside the box to filter out impurities again to avoid clogging. Team to conduct a monthly anti-pollution 1 to 3 times the clean-up. Swimming pool pump rotor blade shape is divided into two kinds, respectively, vortex-type leaves and cutting blades, the two forms of the most widely used leaves. The swirling impeller does not move in the medium being conveyed, and the medium to be pumped is guided to the pump chamber according to the hydrodynamic principle, and the pumped medium flows from the impeller. Thus, long fibers or solid matter in the pumped liquid medium are also pumped together. The cutting blades, can be a large block of solid material chopped, so no longer plug.
In addition to swimming pool water pump blockage, the prevention work is also important, swimming pool pump routine maintenance measures: regular view and regularly clean the barrier basket. When cleaning, do not knock the barrier basket. If the barrier basket is damaged, it should be replaced in time; check the pump head seal regularly. In case of damage, please replace the time; keep the motor clean and keep the motor air outlet; occasionally, the motor shaft seal will wear, should be replaced; winter should remove the pump head water, clean up the pump inside and outside, Store the pump in a dry and well-ventilated room. High anti-blocking performance Swimming pool water pump can better water treatment, reducing human consumption.
2016年12月21日星期三
Energy Saving Methods for Agricultural Pumps
Agricultural pumps energy-saving methods generally include the following aspects:
(1) Agricultural pumps ramp loading, reducing elbow. Turn the pump ramp or volute, so that the outlet is facing the pool.
(1) Agricultural pumps ramp loading, reducing elbow. Turn the pump ramp or volute, so that the outlet is facing the pool.
(2) shorten the pipeline. Remove the 1 m steel pipe, 10 hours to save 0.21 kg of diesel.
(3) to expand the water pipe diameter. The 4-meter-long 10 cm water hose replaced 15 cm tube, 10 hours to save diesel 0.5 kg.
(4) in the water can be kept clean, you can remove the filter.
(5) Agricultural pumps for the ring, adjust the axial clearance. To prevent impeller ring and the axial gap is not appropriate, should be used according to the pump factory instructions to adjust.
(6) the timely elimination of pipeline blockage. Foreign matter left in the inlet pipe, impeller or diversion shell flow path, will reduce the amount of water.
(7) to prevent the pump into the air. Pump into the air, the water will be significantly reduced, should check the sealing parts of the maintenance.
(8) the use of coupling direct drive instead of flat belt, can improve the transmission efficiency.
(9) to eliminate the “anti-aircraft gun” type outlet. This outlet increases energy consumption.
2016年12月19日星期一
2016年12月18日星期日
Construction Technique of Submersible Pump Irrigation System
The first optimization of the submersible pump irrigation system is to submerge the submersible pump as a whole. Depth and underground water-saving pipe, the construction sequence and technical points are:
The first is trench excavation. Based on the current situation of the electromechanical well, the diameter of the pump pipe is 1.2m. 0.9 meters deep circular base groove.
The second is to use a tripod to lift the pump and pump tube
The third is to remove the bottom of the base tank to the ground of the cement pipe. And ensure that the well below the base tank is not affected damage.
The fourth is the base groove at the bottom of the compaction and playing a layer of thick 1O cm of plain concrete. To support the pump. The concrete around the well is thickened to 20 cm. Concrete is labeled CIO.
The fifth is to put down the pump and pump tube, remove the pump outlet pipe.
The sixth is to install the first elbow, check valve, short pipe and other equipment, and underground water pipes connected. To ensure that the central axis of the first equipment and underground water pipeline center axis line
The seventh is to confirm the installation is correct test the water. Check for leaks. Inlet valve, check valve is flexible, whether the equipment is running smoothly.
The eighth is to test the water after the successful installation of the well section by section, stamped, the insurance, lock the door, and backfill the base slot, compacted, flat.
Above is the submersible pump irrigation system construction technology all the points, if there are any technical problems please feel free to contact our technical staff.
2016年12月16日星期五
2016年12月15日星期四
2016年12月14日星期三
Submersible pump how to protect
Submersible pumps often cause the motor windings to burn out because of water shortages in the tank. In view of this situation, today you sort out the submersible pump several protection measures: water protection, motor leakage protection, oil chamber leakage protection, insulation resistance protection, winding overheating protection, bearing overheating protection.
1, prohibit the power supply voltage abnormal start
As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start-up winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.
2, confirm the correct direction of rotation of the motor
Should find out the direction of rotation of the motor, there are many types of high-lift submersible pumps are forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time will damage the motor windings.
3, cable installation and submersible pump insulation resistance requirements
Install the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.
4, to avoid frequent switching
Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if immediately start, the motor load will start, resulting in too large starting current and burn the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.
5, the installation of leakage protection
Leakage protector, also known as Pauling device, its role from the Pauling device these three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protector is installed, the leakage protector will cut off the power of the submersible pump to ensure the safety and avoid the leakage and waste of the electric energy as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not more than 30mA).
6, prohibit long-term overload pump work
In order to avoid the long-term overload of submersible pumps, do not draw large amounts of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should stop inspection. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.
7, focus on routine maintenance
Usually check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired in order to prevent water penetration into the machine.
8, try to avoid low-voltage boot
If the voltage is too high, it will cause the motor to overheat and burn out the winding. If the voltage is too low, the motor speed will decrease. If it does not reach 70% of the rated speed, the centrifugal switch will close, causing the start winding Long-term power and heat or even burn out the winding and capacitors. Do not frequently switch the motor, this is because the pump will produce a return flow stalled, if the immediate start, the motor load will start, resulting in starting current is too large and burn out the winding.
1, prohibit the power supply voltage abnormal start
As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start-up winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.
2, confirm the correct direction of rotation of the motor
Should find out the direction of rotation of the motor, there are many types of high-lift submersible pumps are forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time will damage the motor windings.
3, cable installation and submersible pump insulation resistance requirements
Install the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.
4, to avoid frequent switching
Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if immediately start, the motor load will start, resulting in too large starting current and burn the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.
5, the installation of leakage protection
Leakage protector, also known as Pauling device, its role from the Pauling device these three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protector is installed, the leakage protector will cut off the power of the submersible pump to ensure the safety and avoid the leakage and waste of the electric energy as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not more than 30mA).
6, prohibit long-term overload pump work
In order to avoid the long-term overload of submersible pumps, do not draw large amounts of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should stop inspection. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.
7, focus on routine maintenance
Usually check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired in order to prevent water penetration into the machine.
8, try to avoid low-voltage boot
If the voltage is too high, it will cause the motor to overheat and burn out the winding. If the voltage is too low, the motor speed will decrease. If it does not reach 70% of the rated speed, the centrifugal switch will close, causing the start winding Long-term power and heat or even burn out the winding and capacitors. Do not frequently switch the motor, this is because the pump will produce a return flow stalled, if the immediate start, the motor load will start, resulting in starting current is too large and burn out the winding.
Reasons and Solutions of Submersible Pump Stop
A small number of users in the process of using the submersible pump will encounter a sudden shutdown of the phenomenon does not work, do not understand the internal structure of the submersible pump will be mistaken for the case of submersible pump quality problems, then the reason for sudden shutdown of the submersible pump What? Here to share your sudden diving pump does not work and the reasons for the sudden shutdown of the submersible pump solution for reference:
Submersible pump products, such as stainless steel submersible pump products with submersible pump without burning protection device, as long as the submersible pump motor temperature rises above the preset temperature, the submersible pump will automatically start the protection system to stop running the submersible pump, some users to ordinary diving Pump to take delivery of hot water running about 20 minutes after the submersible pump will automatically stop running, submersible pump itself will run during the operation of the heat, if not the use of high-temperature submersible pumps but the general submersible pump will appear suddenly The phenomenon of shutdown If you use a device without the protection of the submersible pump products will lead to the phenomenon of burning the motor. If the sudden shutdown of the submersible pump is due to the high temperature of the medium caused by the submerged pump sudden stop does not work solution is recommended to choose high temperature submersible pump products suitable for high temperature submersible pump temperature up to 80 degrees.
If the use of submersible pump products is to rely on the configuration of the control cabinet to protect the submersible pumps, such as WQ submersible sewage pump is usually rely on the control cabinet to achieve protection, then the sudden failure of submersible pump does not work may also be due to submersible pump over current Air switch tripping led to a sudden shutdown of the phenomenon of submersible pump, the sudden failure of the submersible pump does not work solution is to improve the use of submersible pump head or a valve installed in the outlet pipe to control the amount of water submersible pump to reduce the submersible pump current Do not over, it will avoid the emergence of such phenomena.
As the submersible pump does not have any protection measures due to lack of phase or over-temperature, overload caused by submarine pump motor burned suddenly appeared to stop the phenomenon of submersible pumps, repaired after the submersible pump motor should be configured with the corresponding pump control cabinet protection submersible pump.
Submersible pump products, such as stainless steel submersible pump products with submersible pump without burning protection device, as long as the submersible pump motor temperature rises above the preset temperature, the submersible pump will automatically start the protection system to stop running the submersible pump, some users to ordinary diving Pump to take delivery of hot water running about 20 minutes after the submersible pump will automatically stop running, submersible pump itself will run during the operation of the heat, if not the use of high-temperature submersible pumps but the general submersible pump will appear suddenly The phenomenon of shutdown If you use a device without the protection of the submersible pump products will lead to the phenomenon of burning the motor. If the sudden shutdown of the submersible pump is due to the high temperature of the medium caused by the submerged pump sudden stop does not work solution is recommended to choose high temperature submersible pump products suitable for high temperature submersible pump temperature up to 80 degrees.
If the use of submersible pump products is to rely on the configuration of the control cabinet to protect the submersible pumps, such as WQ submersible sewage pump is usually rely on the control cabinet to achieve protection, then the sudden failure of submersible pump does not work may also be due to submersible pump over current Air switch tripping led to a sudden shutdown of the phenomenon of submersible pump, the sudden failure of the submersible pump does not work solution is to improve the use of submersible pump head or a valve installed in the outlet pipe to control the amount of water submersible pump to reduce the submersible pump current Do not over, it will avoid the emergence of such phenomena.
As the submersible pump does not have any protection measures due to lack of phase or over-temperature, overload caused by submarine pump motor burned suddenly appeared to stop the phenomenon of submersible pumps, repaired after the submersible pump motor should be configured with the corresponding pump control cabinet protection submersible pump.
Precautions for use of submersible electric water pump
(1) in the well submersible electric water pump cable connected to the live cable before the use of high-impedance voltmeter test the motor winding insulation resistance of the chassis, the value of the hot state should not be less than 0,5 megohm, otherwise Check the wiring and identify the cause.
(2) If the oil-filled motor insulation resistance is low, the winding should be dried, and replace its internal insulating oil.
(3) Check the motor and pump with the size, the amount of electric motor control in the 2 mm or so, check and confirm the disk drive with the shaft, the electric pump shaft can rotate.
(4) in the well submersible electric water pump before the well, should be carefully according to instructions to handle the cable outer connector insulation and sealing.
(5) into the well electric water pump, only to make it completely submerged in water, the well water temperature is not higher than 20 ℃, water pH (pH) of 6,5 ~ 8,5, chlorine ions in water does not exceed 400 ml / Liter and sediment concentration of not more than 0. Ol% to start using the pump.
(6) and supporting the use of protective switches. Electric water pump in the well underwater work, its operation is difficult to observe, if the pump fails to run without protection switch protection, it is very easy to make the motor winding damage. Typically, the protection switch in the wells submersible electric water pump operating power more than 1.05 times the rated current, the action can be within a specified time, its 7 times the current rating of the braking state, the protection switch action time shall not exceed 5 seconds.
(7) to ensure that the electric pump three-phase winding terminal voltage of 342 ~ 418 volts, the voltage is too high or too low will affect the normal operation of the pump, and serious damage to the motor winding. , & Lt;
(8) check and confirm the electric pump rated head and actual head difference does not exceed 20% of the rated head, or should remove the impeller and a wheel with a high degree of the same bushing instead of or close the small water valve, the actual lift Close to the actual head of the actual head of the calculation formula for the actual needs of head = downhole lift + uplift head + loss of head
(9) in the demolition and installation wells submersible electric water pump, both can not be forced to pull the cable, can not make the cable in a free-hanging state. Use, should be every 5 to 10 meters will be fixed in the water pipe on the cable.
(10) wells submersible electric water pump diving depth, usually 2 to 5 meters is appropriate.
2016年12月13日星期二
Definition of secondary water supply of Water Pump
Our secondary water supply, in fact, refers to units or individuals will be municipal water supply or self-built facilities by the storage of water, pump pressure, through the pipeline for the user or for their own use in the form. Therefore, the secondary water supply is the most high-level water supply options. Whether the secondary water supply facilities according to the provisions of the construction, design and construction of the merits of the water supply is directly related to water quality, water pressure and water security, and the people of the normal and stable life is closely related. However, in the past in the country has not yet a complete technical standards for the secondary water supply projects, but in the "Building Water Supply and Drainage Design Code," the relevant sections of some of the requirements.
In this case,
Secondary water supply facilities mainly to make up for lack of municipal water supply line pressure to ensure that living, living in high-level population and the establishment of water. Compared with the raw water supply, the quality of the water supply is more susceptible to contamination, and the safety and reliability of the water supply has been widely concerned by the public.
In the forthcoming implementation of the "standard", corresponding to the construction of water supply facilities construction projects, building height and the municipal water supply pipe network and the secondary water supply points made it clear that: all public building height of more than 12 meters, The secondary water supply facilities must be set independently, and shall not be mixed with the facilities such as fire fighting; the secondary water supply (such as water supply) shall not be mixed with other facilities; The water supply facilities must have a stable and reliable disinfection measures and anti-backflow of pollution measures; prohibited design, construction of buried or semi-buried water tank; for the secondary water supply (such as water supply), the water supply facilities should be designed with the main project at the same time, The total effective volume of the water tank should not exceed 36 hours of domestic water consumption, the volume of more than 50 cubic meters of water tanks must be divided into two parts: water tanks, water tanks, water tanks, water tanks, For the two cells, and can work independently.
In this case,
Secondary water supply facilities mainly to make up for lack of municipal water supply line pressure to ensure that living, living in high-level population and the establishment of water. Compared with the raw water supply, the quality of the water supply is more susceptible to contamination, and the safety and reliability of the water supply has been widely concerned by the public.
In the forthcoming implementation of the "standard", corresponding to the construction of water supply facilities construction projects, building height and the municipal water supply pipe network and the secondary water supply points made it clear that: all public building height of more than 12 meters, The secondary water supply facilities must be set independently, and shall not be mixed with the facilities such as fire fighting; the secondary water supply (such as water supply) shall not be mixed with other facilities; The water supply facilities must have a stable and reliable disinfection measures and anti-backflow of pollution measures; prohibited design, construction of buried or semi-buried water tank; for the secondary water supply (such as water supply), the water supply facilities should be designed with the main project at the same time, The total effective volume of the water tank should not exceed 36 hours of domestic water consumption, the volume of more than 50 cubic meters of water tanks must be divided into two parts: water tanks, water tanks, water tanks, water tanks, For the two cells, and can work independently.
2016年12月12日星期一
pump flow adjustment methods
pump flow adjustment commonly used the following methods:
(1) outlet valve adjustment, is the most commonly used, the most popular use. In the pump discharge pipe installed on the control valve, by changing the valve opening degree to achieve pump flow regulation, simple and reliable method, but the power loss is large, the economy is not good, small flow or small flow regulation is not good.
(2) variable speed regulation, by changing the pump impeller speed to adjust the pump flow, this method is very small additional power loss is the most economical method. But need to increase the variable speed mechanism and variable speed motor, the initial input cost is higher. Constant pressure frequency conversion water supply system and the central air conditioning cooling water (chilled water) circulation system is the frequency conversion velocity modulation in the water pump adjustment application two typical examples. The method of changing the speed is most suitable for turbines, internal combustion engines and DC motor-driven pumps. Variable speed control can also be used to change the motor speed, sometimes with a hydraulic coupler.
(3) bypass regulation, the use of bypass shunt regulator pump flow, can solve the problem of continuous operation of the pump in the small flow, but caused the shunt flow is not fully utilized additional losses increase, while process piping also increases.
(4) cutting the outer diameter of the impeller, by cutting the impeller diameter method to adjust the pump flow, power loss is small, but the impeller can not be restored after cutting only small flow direction to adjust the pump flow. And the cutting volume of the impeller is limited, the flow adjustment range is limited. Suitable for long-term work in a small flow and traffic change is not the occasion.
(5) replace the impeller pump, the replacement of the impeller diameter of different diameter or export regulation pump flow, power loss is small, but need to prepare a variety of diameter impeller, and adjust the flow range is limited.
(6) blocking part of the impeller flow channel, by blocking the impeller flow (even) to reduce the flow of the pump, the equivalent of export valve throttling adjustment, but the initiative to adjust the additional energy loss reduction than throttling regulating energy saving.
(7) adjust the exit angle of the blade, by changing the impeller blade exit angle to achieve the adjustment of pump flow, this method is used for axial flow pump.
(8) cavitation adjustment, by changing the pump inlet pressure (water level, suction valve) method, the pump cavitation, change the pump characteristic curve, thus changing the pump flow method. Practice has proved that if the use of appropriate cavitation adjustment, then the pump flow components of the damage is not serious; the other hand, it can automatically adjust the flow and reduce the pump power consumption. Cavitation regulation is generally more in small and medium-sized thermal power plant condensate pump on the use.
(9) to increase or decrease the number of pump units, by increasing, reducing the number of pump operation combined with the appropriate combination to achieve pump flow regulation.
What are the different starting characteristics of different pumps?
Sufficient attention should be paid to the start-up characteristics of different types of pumps. Pump or pump group start is a light load in terms of prime mover start, under normal circumstances will not start any problem. However, for some large units, due to the inertia of the unit, starting difficult, start a larger start current, pay attention to start the way, then the power grid or motor damage.
(1) zero-flow start-up characteristics of centrifugal pumps - off valve to start
Centrifugal pump in the zero flow conditions when the shaft power of the smallest, for the rated shaft power of 30% to 90%, so the start-up characteristics of the centrifugal pump is zero flow start (that is, off valve start). Until the pump to the rated speed after the discharge valve can be adjusted to flow rated point.
Centrifugal pump in the zero flow conditions when the shaft power of the smallest, for the rated shaft power of 30% to 90%, so the start-up characteristics of the centrifugal pump is zero flow start (that is, off valve start). Until the pump to the rated speed after the discharge valve can be adjusted to flow rated point.
(2) axial flow pump large flow start characteristics - full-open valve to start
Axial flow pump in the zero-flow conditions when the shaft power of the largest, for the rated shaft power of 140% to 200%, the maximum flow power is minimal, so in order to start the current minimum, shaft power starting characteristics should be large flow start Valve activation).
Axial flow pump in the zero-flow conditions when the shaft power of the largest, for the rated shaft power of 140% to 200%, the maximum flow power is minimal, so in order to start the current minimum, shaft power starting characteristics should be large flow start Valve activation).
(3) start-up characteristics of mixed-flow pump - fully open the valve to start
Mixed-flow pump in the zero-flow conditions between the shaft power between the two pumps, the rated power of 100% to 130%, so mixed-flow pump start-up characteristics should be between the two pumps, the best fully open valve start up.
Mixed-flow pump in the zero-flow conditions between the shaft power between the two pumps, the rated power of 100% to 130%, so mixed-flow pump start-up characteristics should be between the two pumps, the best fully open valve start up.
(4) start-up characteristics of the vortex pump - open the valve to start
Vortex pump in the zero flow conditions, the largest shaft power, rated shaft power of 130% to 190%, so with the axial pump is similar to the start of the vortex pump should be a large flow start (that is, full-open valve start).
Vortex pump in the zero flow conditions, the largest shaft power, rated shaft power of 130% to 190%, so with the axial pump is similar to the start of the vortex pump should be a large flow start (that is, full-open valve start).
Sufficient attention should be paid to the start-up characteristics of different types of pumps. Pump or pump group start is a light load in terms of prime mover start, under normal circumstances will not start any problem. However, for some large units, due to the inertia of the unit, starting difficult, start a larger start current, pay attention to start the way, then the power grid or motor damage.
(1) zero-flow start-up characteristics of centrifugal pumps - off valve to start
Centrifugal pump in the zero flow conditions when the shaft power of the smallest, for the rated shaft power of 30% to 90%, so the start-up characteristics of the centrifugal pump is zero flow start (that is, off valve start). Until the pump to the rated speed after the discharge valve can be adjusted to flow rated point.
Centrifugal pump in the zero flow conditions when the shaft power of the smallest, for the rated shaft power of 30% to 90%, so the start-up characteristics of the centrifugal pump is zero flow start (that is, off valve start). Until the pump to the rated speed after the discharge valve can be adjusted to flow rated point.
(2) axial flow pump large flow start characteristics - full-open valve to start
Axial flow pump in the zero-flow conditions when the shaft power of the largest, for the rated shaft power of 140% to 200%, the maximum flow power is minimal, so in order to start the current minimum, shaft power starting characteristics should be large flow start Valve activation).
Axial flow pump in the zero-flow conditions when the shaft power of the largest, for the rated shaft power of 140% to 200%, the maximum flow power is minimal, so in order to start the current minimum, shaft power starting characteristics should be large flow start Valve activation).
(3) start-up characteristics of mixed-flow pump - fully open the valve to start
Mixed-flow pump in the zero-flow conditions between the shaft power between the two pumps, the rated power of 100% to 130%, so mixed-flow pump start-up characteristics should be between the two pumps, the best fully open valve start up.
Mixed-flow pump in the zero-flow conditions between the shaft power between the two pumps, the rated power of 100% to 130%, so mixed-flow pump start-up characteristics should be between the two pumps, the best fully open valve start up.
(4) start-up characteristics of the vortex pump - open the valve to start
Vortex pump in the zero flow conditions, the largest shaft power, rated shaft power of 130% to 190%, so with the axial pump is similar to the start of the vortex pump should be a large flow start (that is, full-open valve start).
Vortex pump in the zero flow conditions, the largest shaft power, rated shaft power of 130% to 190%, so with the axial pump is similar to the start of the vortex pump should be a large flow start (that is, full-open valve start).
2016年12月11日星期日
Method for regulating well submersible pump
The submersible pump is mainly in water treatment, mine accident rescue, industrial cooling and other aspects of the situation, with the increase of well submersible pump used, prone to problems in their work, how to adjust the submersible pump when working well, this problem has been more and more people attention will then do for you in detail:
Introduction to the regulation method of well submersible pump
1, the use of motor speed to change the operating conditions of the pump device:
With the new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality and stable and reliable. China is a country with a vast territory, in many areas the need for production equipment is not the same, but in the industrial field of our country, the application of well submersible pump is also increasing. The technology of well submersible pump in our country is still in the development stage, the technology should be further improved.
What are the adjustment methods of the well used Submersible Pump
2, speed control operation:
Speed control operation is a submersible pump in the variable speed motor drive operation, with its outstanding performance in the problem of its processing, more people pay attention to the use of this product in real production. How to maximize the performance of its use value, the need for manufacturers and customers to do more work and research, as long as the development in the right direction, well submersible pump will be more beautiful tomorrow.
3, can be achieved through the throttle valve:
That is to change the open degree of the mine pump water outlet, the small gate valve, the local resistance of the pipe increases, the pipeline system characteristic curve becomes steep, the pump device's working point will make the corresponding change, the water quantity decreases accordingly. When the valve is closed, the local resistance of the pipe is close to infinity, and the water is cut off. This will be more applicable to production.
Well submersible pumps are common types of QJ well submersible pump and QJT submersible pumps, they are the main force of the deep wells to carry water. QJ submersible pump is a kind of heat, with anti-corrosion, anti-aging, high quality submersible pump use temperature of 120 DEG C; QJT submersible pump is a kind of compact structure, small volume, light weight, convenient installation, use and maintenance, submersible pump advantages of safe and reliable transportation, energy conservation and other wells.
Introduction to the regulation method of well submersible pump
1, the use of motor speed to change the operating conditions of the pump device:
With the new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality and stable and reliable. China is a country with a vast territory, in many areas the need for production equipment is not the same, but in the industrial field of our country, the application of well submersible pump is also increasing. The technology of well submersible pump in our country is still in the development stage, the technology should be further improved.
What are the adjustment methods of the well used Submersible Pump
2, speed control operation:
Speed control operation is a submersible pump in the variable speed motor drive operation, with its outstanding performance in the problem of its processing, more people pay attention to the use of this product in real production. How to maximize the performance of its use value, the need for manufacturers and customers to do more work and research, as long as the development in the right direction, well submersible pump will be more beautiful tomorrow.
3, can be achieved through the throttle valve:
That is to change the open degree of the mine pump water outlet, the small gate valve, the local resistance of the pipe increases, the pipeline system characteristic curve becomes steep, the pump device's working point will make the corresponding change, the water quantity decreases accordingly. When the valve is closed, the local resistance of the pipe is close to infinity, and the water is cut off. This will be more applicable to production.
Well submersible pumps are common types of QJ well submersible pump and QJT submersible pumps, they are the main force of the deep wells to carry water. QJ submersible pump is a kind of heat, with anti-corrosion, anti-aging, high quality submersible pump use temperature of 120 DEG C; QJT submersible pump is a kind of compact structure, small volume, light weight, convenient installation, use and maintenance, submersible pump advantages of safe and reliable transportation, energy conservation and other wells.
Submersible pump derusting
Submersible pump will not rust if used for a long time, a serious rust can not be used. Therefore, the daily maintenance of the pump is very important. Especially those who have mild rust submersible pump, must be done in a timely manner after the rust work, or will further expand the rust, the deep-water operations threat!
In general, the submersible pump rust generally rely on chemical rust, which is the use of a number of specialized syrup sprayed on the surface, so that natural fall off the rust, this method is the fastest and most effective. In fact, chemical derusting also has its own shortcomings, medicine will be submerged pump cavity damage caused by repeated use may lead to leakage of the pump chamber. Therefore, the submersible pump rust is the best way to deal with artificial rust, rust with their own tools to get rid of, not only can effectively protect the pump chamber, but also eliminates the cost of chemical derusting.
For those who do not use the submersible pump is often the most prone to rust. This is because many customers neglected to use the pump cavity in the water did not clean up on the clean up, the water corrosion of the pump chamber eventually led to the pump chamber. Therefore, do not use the submersible pump should be wiped with a dry cloth pump chamber, it is absolutely dry in the case, so as not to rust.
In general, the submersible pump rust generally rely on chemical rust, which is the use of a number of specialized syrup sprayed on the surface, so that natural fall off the rust, this method is the fastest and most effective. In fact, chemical derusting also has its own shortcomings, medicine will be submerged pump cavity damage caused by repeated use may lead to leakage of the pump chamber. Therefore, the submersible pump rust is the best way to deal with artificial rust, rust with their own tools to get rid of, not only can effectively protect the pump chamber, but also eliminates the cost of chemical derusting.
For those who do not use the submersible pump is often the most prone to rust. This is because many customers neglected to use the pump cavity in the water did not clean up on the clean up, the water corrosion of the pump chamber eventually led to the pump chamber. Therefore, do not use the submersible pump should be wiped with a dry cloth pump chamber, it is absolutely dry in the case, so as not to rust.
2016年12月9日星期五
2016年12月8日星期四
2016年12月7日星期三
2016年12月6日星期二
2016年12月5日星期一
How to correctly install the pump can effectively prevent the pump vibration isolation phenomenon
This article describes how to properly install the pump can effectively prevent the pump to produce vibration isolation phenomenon.
1, vibration isolation components should be symmetrical to the pump unit axis layout. The rubber vibration-isolating pad may be arranged in a clockwise direction or a counterclockwise direction.
2, when the unit vibration isolation components with six support points, four of which are arranged in the inert block or steel frame four corners, the other two should be set on the long side line, and adjust its position, so that the vibration component compression deformation Keep it as consistent as possible.
3, horizontal vibration isolation unit installed vibration isolation rubber dampers or damped spring isolator, under normal circumstances, the rubber vibration isolator and damping spring isolator and the ground, and between the inert block or steel frame without Bonded or fixed.
4, vertical vibration isolation vibration pump unit installed in the use of rubber isolators, the pump unit under the base, should set the steel frame and the use of anchor-type installation; steel frame and rubber vibration between the application of bolts (additional spring washers )fixed. In the ground or floor set in the anchor bolts, rubber vibration through the anchor bolts after the fixed on the ground or floor.
5, the edge of the rubber vibration pad shall not exceed the edge of the inert block; steel frame bearing area should not be less than the top of the vibration bearing support area.
6, single-layer rubber vibration isolation pad layout, the frequency ratio can not meet the requirements, can be arranged in multi-layer series, but the vibration isolation layer should not be more than five layers. Set the series of rubber vibration isolation pad, the model, the number of blocks, area and rubber hardness should be completely consistent.
7, rubber vibration isolation mat multi-layer set, the isolation between each layer with a thickness of not less than 4mm galvanized steel plate separated, steel plate should be flat, vibration isolation plate and the application of adhesive adhesive plate. Galvanized steel plate plane size should be greater than each end of the rubber vibration pad 10mm. Galvanized steel sheet, the lower bonding rubber vibration pads should be staggered set.
8, the construction before installation, should be promptly checked, the installation should be so that vibration isolation components of the static compression deformation shall not exceed the maximum allowable value.
9, the pump unit installed, the installation of the water pump unit supporting the ground level, and should have sufficient carrying capacity.
10, the unit vibration isolation components should avoid acid, alkali and organic solvents and other substances in contact.
1, vibration isolation components should be symmetrical to the pump unit axis layout. The rubber vibration-isolating pad may be arranged in a clockwise direction or a counterclockwise direction.
2, when the unit vibration isolation components with six support points, four of which are arranged in the inert block or steel frame four corners, the other two should be set on the long side line, and adjust its position, so that the vibration component compression deformation Keep it as consistent as possible.
3, horizontal vibration isolation unit installed vibration isolation rubber dampers or damped spring isolator, under normal circumstances, the rubber vibration isolator and damping spring isolator and the ground, and between the inert block or steel frame without Bonded or fixed.
4, vertical vibration isolation vibration pump unit installed in the use of rubber isolators, the pump unit under the base, should set the steel frame and the use of anchor-type installation; steel frame and rubber vibration between the application of bolts (additional spring washers )fixed. In the ground or floor set in the anchor bolts, rubber vibration through the anchor bolts after the fixed on the ground or floor.
5, the edge of the rubber vibration pad shall not exceed the edge of the inert block; steel frame bearing area should not be less than the top of the vibration bearing support area.
6, single-layer rubber vibration isolation pad layout, the frequency ratio can not meet the requirements, can be arranged in multi-layer series, but the vibration isolation layer should not be more than five layers. Set the series of rubber vibration isolation pad, the model, the number of blocks, area and rubber hardness should be completely consistent.
7, rubber vibration isolation mat multi-layer set, the isolation between each layer with a thickness of not less than 4mm galvanized steel plate separated, steel plate should be flat, vibration isolation plate and the application of adhesive adhesive plate. Galvanized steel plate plane size should be greater than each end of the rubber vibration pad 10mm. Galvanized steel sheet, the lower bonding rubber vibration pads should be staggered set.
8, the construction before installation, should be promptly checked, the installation should be so that vibration isolation components of the static compression deformation shall not exceed the maximum allowable value.
9, the pump unit installed, the installation of the water pump unit supporting the ground level, and should have sufficient carrying capacity.
10, the unit vibration isolation components should avoid acid, alkali and organic solvents and other substances in contact.
2016年12月4日星期日
Submersible pump and sewage pump difference
Submersible pumps and sewage pumps are often heard is also very common pump, they are in industrial production, agricultural production, municipal life and many other aspects are used. But the difference between submersible pumps and sewage pumps is what?
First of all submersible pumps are installed according to the sub-points, because he is installed in the water below, is sealed machine, the motor and the pump body is one, through the water to cool them to heat. Submersible pumps are divided into single-phase submersible pumps and three-phase submersible pumps also have a custom submersible pump, while submersible pumps are divided into clean water submersible pumps and sewage submersible pumps, by pumping different liquids, different environments choose the right submersible pump.
Sewage pump is divided according to the pumping of liquid, such as pumping water, called clean water pump; pumping acid liquid, you can call acid pump; pumping sewage can be called sewage pump. Sewage pumps are pipeline sewage pump, submersible sewage pump, self-priming sewage pump, screw sewage pump, diaphragm sewage pump. As long as used to pumping sewage, can be called sewage pump.
So there is no obvious relationship between the two, one is divided by installation, one is divided by the extraction of liquid, submersible pumps also have submersible sewage pumps, sewage pumps have sewage submersible pumps. When we choose the pump, if the pumping of sewage, first select the sewage pump, and then according to the installation method to select the submersible sewage pump or dry installation of the sewage pump.
First of all submersible pumps are installed according to the sub-points, because he is installed in the water below, is sealed machine, the motor and the pump body is one, through the water to cool them to heat. Submersible pumps are divided into single-phase submersible pumps and three-phase submersible pumps also have a custom submersible pump, while submersible pumps are divided into clean water submersible pumps and sewage submersible pumps, by pumping different liquids, different environments choose the right submersible pump.
Sewage pump is divided according to the pumping of liquid, such as pumping water, called clean water pump; pumping acid liquid, you can call acid pump; pumping sewage can be called sewage pump. Sewage pumps are pipeline sewage pump, submersible sewage pump, self-priming sewage pump, screw sewage pump, diaphragm sewage pump. As long as used to pumping sewage, can be called sewage pump.
So there is no obvious relationship between the two, one is divided by installation, one is divided by the extraction of liquid, submersible pumps also have submersible sewage pumps, sewage pumps have sewage submersible pumps. When we choose the pump, if the pumping of sewage, first select the sewage pump, and then according to the installation method to select the submersible sewage pump or dry installation of the sewage pump.
Code for installation of submersible pumps
1. Submersible pump installation, the weight of the pipeline to avoid to bear in the pump, the anchor bolts or expansion bolts are required to ensure complete installation time, and within a certain period of time to check to prevent loosening vibration.
2. In the installation of submersible pumps, install the import and export of pipe connections, and then fixed the anchor bolts of the pump, so that the installation sequence can avoid the installation of tensile stress, the pump has the appropriate damage. In principle, the installation of valves and soft connection (shock section) can facilitate the late maintenance of the pump, but also to reduce pipeline resistance and transmission efficiency, piping should be slightly larger than the pump inlet and outlet. (When the inlet pipe diameter larger than the diameter of the pump should be installed eccentric reducer, the tube plane position on the ramp in the next, to prevent the accumulation of air in the tube.Also, when connected with the diameter when the diameter, preferably in the The inlet with a straight tube, straight tube length greater than the diameter of 2 to 3 times or more)
3. Before installing the pump, consider the installation location of the rationality. The first to meet the pump suction vacuum height requirements, if the conditions can not meet the needs of the pump must be installed before the equipment to make adjustments, the second pump and pump, pump and pump room to maintain a reasonable position between the space for easy maintenance And other installation items, the third for special pumps need to pay attention to its installation precautions, read and understand the hands-on installation. Fourth, the installation location may be a natural or unnatural problems, such as noise, leakage, vibration, etc., you must do pre-installation isolation, insulation, sewage and so on.
4. Submersible pump Before connecting the pipeline, you should carefully check the submersible pump body with or without debris, such as wires, mounting tools, packaging materials or other hard objects, and promptly removed to avoid pump after the impact of pump quality and damage.
5. Water pump In the process of installation of pipelines, in order to facilitate the maintenance and safe use of imported water pump configuration a control valve, the export configuration of a pressure gauge and valves to ensure that the pump in the best conditions of operation. For Yang Cheng higher pumps, the export of the valve before the installation of one-way check valve to prevent the pump in a sudden shutdown of the water hammer to the destruction of the pump, thereby enhancing the pump life.
6. If the transmission medium containing debris, then debris is easy to enter the pump damage to the internal structure of the pump, and easy to block the export pipeline, the maintenance of great difficulties later, it should be installed in the pump inlet filter Network, filters, etc., to avoid a similar situation.
7. For suction pumps with a high degree of suction requirements, the submersible pump inlet must have strict requirements. First of all, consider the performance of the pump to meet the installation requirements, but also take into account when the pump running to bring the level drop caused by the height gap. The pump inlet pipe to ensure that no water leakage, no leakage, less elbow, minimize the length of the pump is not self-priming, but also need to consider the installation of the bottom valve, filters, filters and so on.
8. The basis of the pump to ensure that the installation of submersible pumps to maintain the level of the contact surface, the location and size of the hole set aside according to the actual size of the pump to decide. The use of vibration isolator or cushion when the need to take full account of the static and dynamic load of the pump,
9. For environmental reasons, when installing the pump, it must be equipped with a rain cover or a simple canopy to avoid external factors such as damage.
2. In the installation of submersible pumps, install the import and export of pipe connections, and then fixed the anchor bolts of the pump, so that the installation sequence can avoid the installation of tensile stress, the pump has the appropriate damage. In principle, the installation of valves and soft connection (shock section) can facilitate the late maintenance of the pump, but also to reduce pipeline resistance and transmission efficiency, piping should be slightly larger than the pump inlet and outlet. (When the inlet pipe diameter larger than the diameter of the pump should be installed eccentric reducer, the tube plane position on the ramp in the next, to prevent the accumulation of air in the tube.Also, when connected with the diameter when the diameter, preferably in the The inlet with a straight tube, straight tube length greater than the diameter of 2 to 3 times or more)
3. Before installing the pump, consider the installation location of the rationality. The first to meet the pump suction vacuum height requirements, if the conditions can not meet the needs of the pump must be installed before the equipment to make adjustments, the second pump and pump, pump and pump room to maintain a reasonable position between the space for easy maintenance And other installation items, the third for special pumps need to pay attention to its installation precautions, read and understand the hands-on installation. Fourth, the installation location may be a natural or unnatural problems, such as noise, leakage, vibration, etc., you must do pre-installation isolation, insulation, sewage and so on.
4. Submersible pump Before connecting the pipeline, you should carefully check the submersible pump body with or without debris, such as wires, mounting tools, packaging materials or other hard objects, and promptly removed to avoid pump after the impact of pump quality and damage.
5. Water pump In the process of installation of pipelines, in order to facilitate the maintenance and safe use of imported water pump configuration a control valve, the export configuration of a pressure gauge and valves to ensure that the pump in the best conditions of operation. For Yang Cheng higher pumps, the export of the valve before the installation of one-way check valve to prevent the pump in a sudden shutdown of the water hammer to the destruction of the pump, thereby enhancing the pump life.
6. If the transmission medium containing debris, then debris is easy to enter the pump damage to the internal structure of the pump, and easy to block the export pipeline, the maintenance of great difficulties later, it should be installed in the pump inlet filter Network, filters, etc., to avoid a similar situation.
7. For suction pumps with a high degree of suction requirements, the submersible pump inlet must have strict requirements. First of all, consider the performance of the pump to meet the installation requirements, but also take into account when the pump running to bring the level drop caused by the height gap. The pump inlet pipe to ensure that no water leakage, no leakage, less elbow, minimize the length of the pump is not self-priming, but also need to consider the installation of the bottom valve, filters, filters and so on.
8. The basis of the pump to ensure that the installation of submersible pumps to maintain the level of the contact surface, the location and size of the hole set aside according to the actual size of the pump to decide. The use of vibration isolator or cushion when the need to take full account of the static and dynamic load of the pump,
9. For environmental reasons, when installing the pump, it must be equipped with a rain cover or a simple canopy to avoid external factors such as damage.
2016年12月1日星期四
Flange connection in submersible pump
What is a flange
Flange: is a disc shaped parts, cast steel, stainless steel and other materials, the import and export of submersible pump and pipe connection, the most common in the pipeline project, the flange is used in pairs. According to the needs of users in the submersible pump with the corresponding material of the flange connection pipe, a variety of installation of a flange plate. General low pressure pipe can be used wire connection flange, 4 kg or more pressure on the use of welding flange. Sometimes submersible pumps and valves, also made corresponding to the shape of the flange, in connection with the pipe, the local equipment, which is also known as the flange connection. But there is one called: flange parts) is the two plane in the surrounding the use of bolts and closed connecting parts, generally referred to as "flange", like between the submersible pump and pump inlet and outlet pipeline through the flange connecting flange connection.
What is a live sleeve flange? Where and what kind of pipe fittings are used in the live sleeve flange
Loose flange: that is, the flange can be activities, generally supporting the drainage accessories (the most common slip joint), the factory expansion joints at both ends have a flange bolt connection pipeline, directly and in engineering equipment.
What is the meaning of flange type
Flange type: two end faces of the valve with N are all cloth bolt hole is the flange type. Flange is a link, used to connect the valve and pipe, the valve is connected with the pipe connection is connected through the bolt, so the two end of the valve with N are all cloth bolt hole is the flange type.
1, the flange flange is flange: transliteration, meaning that, with flange parts, the parts can be alone, is the flange, can also be combined, such as pipe end or ends with flange, flange on several through holes for mounting screws, some bearing outer ring with flange. The flange can have holes, can not only block with holes, edge positioning.
2, flange type: valve and pipeline or equipment is connected with flange connection, also known as the connection mode for flange
How the flange is connected with the pipe in what part of the weld
Classification: flat flange, flange welding flange (neck flange), loose flange etc.. Flange for low pressure, using plug welding, both sides of the welding, welding depth from the flange sealing surface 2-5mm can be welded directly welded flange, loose flange bolt connection without welding.
Energy saving method for water pump motor
The motor is very important in the production of power plant, the production and life around it is self-evident, and then use the motor, a problem of energy saving is also of concern to the people, here to talk about what the pump motor in the process of using such method.
1 big horse drawn trolley
When the motor load rate is less than 0.4, the size of the power should adjust the motor, to replace the original motor power is less than one, the motor load rate at 0.6 ~ 0.7.
2 the use of nylon flat belt to bring the replacement of nylon flat rubber belt
Simple, technically no special requirements, only a simple calculation, the replacement of a pulley can be. If conditions permit, the indirect transmission of the motor, instead of the direct drive pump, can improve the efficiency of 2 ~ 3%.
3 change energy saving motor
Application of Y series (Basic Series) motor
Adopt Y type energy saving motor, replace the J2 and JO2 products in 60s. Adopt international standards, improve the efficiency level, and locked rotor torque, reduce the volume, increase the current noise, vibration control, but also a reasonable structure, selection of beautiful, good general, long life and so on.
Using YX (derived Series) high efficiency motor
This is a series of low loss, high efficiency motor, shaft center height is H100-H280; the power range is 1.5kW-90kW; 2, 4 and 6 poles than Y series motor efficiency increased by 3% on average, average loss decreased by 28.6%, and the current level of foreign high efficiency motor equivalent. However, this kind of motor price than the Y series of high 30%. this motor is worth a long time to run, high load rate of textile, chemical, fans, pumps, etc..
Energy saving transformation of 4 pump motor
The ventilation loss of the energy saving fan motor occupies a large proportion of the total loss, therefore, the ventilation loss is reduced, and the energy saving effect is obvious. And the JO2 is concerned, the transformation of the fan and the wind hood does not need to change any part of the internal.
The use of magnetic slot mud (CC magnetic material or mud) to replace the common wedge in motor stator core slot tends to smooth, after curing, and the bad wall firmly, and magnetic wedge. So as to improve the gear tooth effect, reduce the loss of copper, iron, machinery, and so on, and provide a new way for the transformation of the energy consuming motor.
5 large cross section of the wire
Using larger cross section conductor, not only in the light load running state, life will be greatly extended, the power saving effect is significant (using copper cable, etc.).
6 pay attention to the cleaning and lubrication of the bearing and winding.
Proper lubrication of bearings and the correct installation and maintenance of the winding, can make the motor energy saving in the operation.
Grease excessive or inferior, will increase the friction loss, reduce efficiency; and will make the oil thrown into the winding, damage to the winding. Therefore, the maintenance should be properly filled with grease, and the use of high-quality lithium base grease. At the same time, but also to prevent moisture and harmful gas into the interior of the motor, keep the winding temperature above zero.
7 using reactive power automatic compensation
The load of pump motor is inductive, and its current vector lags behind the voltage vector. This kind of load consumes the active power, but also consumes the reactive power, and the reactive power consumption is greater than the active power.
To improve the cos Phi approach is in parallel with the capacitor load at both ends of the inductive properties of the opposite, with capacitive reactive power (negative) to offset the inductive reactive power (positive). In fact, the reactive power fluctuation of inductance and capacitor is 180 degrees. That is, when the inductance coil absorbs energy, the capacitor releases energy, and the capacitor absorbs energy (the charging process). The shunt capacitor has the characteristics, is widely used in transportation, improve the rate and distribution in electric equipment.
Compensation method: in the application of reactive power automatic compensation, the empirical formula: the reactive power running current of capacitor is 56%.
8 using S10 type energy saving transformer
The motor rate is directly related to improve the reasonable selection of transformer capacity models, constraints, and reactive power compensation factors therefore, from the perspective of saving. It is important to S7, SL7, SZ7 as soon as possible, SLZ7 series 10 ~ 35kV transformer, replace the SL and SL1 series energy transformer, the 45 degree full inclined joint, no punching, glass fiber banding, core selection of high-quality grain oriented silicon steel sheet cold rolling. The acetal enamelled wire winding wire. As well as new materials, new structure and new technology, it has the advantages of low loss, small size, light weight, low weight, saving electricity, and so on.
9 water pump selection, commissioning and maintenance
A motor driven pump working machine is a whole system. The level of efficiency of the working machine, will directly affect the number of motor power consumption. The operating efficiency of water pump and its size, flow rate, flow, speed and other data are interrelated, and should be reasonable choice, set a not only to meet the production requirements, but also to obtain the best efficiency of the working conditions.
Regular adjustment of the balance of the impeller and improve its finish, adjust the axial gap and replace the mouth ring, improve the water inlet and outlet pipe, reduce the number of elbow,
订阅：
博文 (Atom)