QS Special Submersible Electric Pump For Freshwater And Seawater Aquaculture

Well-designed sand-proof large flow water system, using water-immersed motor, no oil after burning machine does not pollute water. Suitable for freshwater aquaculture extraction of river water, sea water oxygen. Flow range 100-1000m3/h, lift 3-100m, power 3-100KW.

1, power supply: three-phase AC 380V (tolerance + / - 5%), 50HZ (tolerance + / - 1%).

2, water quality:

(1) water temperature is not higher than 20 °C;

(2) solid impurities content (mass ratio) is not greater than 0.01%;

(3) PH value (pH) 6.5-8.5;

(4) hydrogen sulfide content is not greater than 1.5mg/L;

(5) chloride ion content is not greater than 400mg/L.

3, the motor is closed or water-filled wet structure, before use the submersible motor cavity must be full of clean water, to prevent false full, and then tighten the water injection, air release bolts, otherwise not allowed to use

4, submersible pump must be completely submerged in the water, the diving depth is not greater than 70m, the bottom of the submersible pump from the bottom of the well is not less than 3m.

5, the well water flow should be able to meet the submersible pump water output and continuous operation, the submersible pump water output should be controlled at 0.7 - 1.2 times the rated flow.

6, the well should be straight, the submersible pump can not be used or dumped, only vertical use.

7, the submersible pump must be matched with the cable according to the requirements, and the external overload protection device. 8, the pump is strictly prohibited without water no-load test machine

 This well submersible pump is a clean water pump. It is strictly prohibited to excavate new wells, discharge sediments and muddy water. The voltage rating of the pump is 380/50 hertz, and other voltage ratings are not allowed. The submersible motor needs to be customized, and the underground cable must be waterproof cable, and must be equipped with starting equipment, such as distribution box, etc. The starting equipment should have common motor comprehensive protection functions, such as short circuit overload protection, phase loss protection, undervoltage protection, grounding protection and idling protection, etc. In order to prevent abnormal conditions, the protection device should be timely trip. During the installation and use process, the pump must be reliably grounded. It is strictly prohibited to push and pull the switch when hands and feet are wet. The power supply must be cut off before installation and maintenance of the pump. An obvious "anti-electric shock" sign must be set up where the pump is used. Before going down the well or installing, the motor must fill the inner cavity with distilled water or non-corrosive clean cold water, and the inlet and outlet bolts must be tightened. When testing the pump, the pump cavity must be filled with water to lubricate the rubber bearings, and the instant start time shall not exceed one second to check whether the direction is correct. Pay attention to safety when lifting, and prevent the overturning of the pump from causing injury. Strictly according to the provisions of the pump lift and flow range, to prevent the pump in low lift when the large flow or in high lift when the large pull, resulting in serious wear and tear of thrust bearings and other parts, causing motor overload and burnout. After the pump into the well, the insulation resistance between the motor and the ground should not be less than 100MΩ, after the start of regular observation of voltage and current, and check whether the motor winding insulation meets the requirements; if the pump storage temperature below freezing, the water in the motor cavity should be discharged to prevent the cold temperature caused by the motor cavity water icing and damage the motor due to low temperature.

Brief introduction of structure: pump part is mainly composed of pump shaft, impeller, diversion shell, rubber bearing, check valve body (optional parts) and other components. Motor part is mainly composed of base, pressure regulating film, thrust bearing, thrust plate, lower guide bearing seat, stator, rotor, upper guide bearing seat, sand ring, water inlet section, cable and other components.

The main features of the product include:

 1, The motor is a water-filled wet submersible three-phase asynchronous motor, the motor cavity is full of clean water, used to cool the motor and lubricate the bearing, the pressure regulating film at the bottom of the motor is used to adjust the expansion and contraction pressure difference of the water inside the body caused by the change of the temperature rise of the motor.

 2, In order to prevent the sand in the well water from entering the motor, the upper end of the motor shaft is equipped with two oil seals, and a sand ring is installed to form a sand prevention structure.

 3, In order to prevent the pump shaft from running up when starting, the pump shaft and the motor shaft are connected by a coupling, and an upper thrust bearing is installed at the lower part of the motor.

 4, The lubrication of the motor and the pump bearing is water lubrication.

 5, The motor stator winding is made of high quality submersible motor winding wire, with high insulation performance.

 6, The pump is designed by computer CAD, with simple structure and good technical performance.

(1)Preparation before installation:
1. Check whether the submersible pump meets the usage conditions and scope specifed in the manual.
2. Using a heavy obiect with a diameter equal to the maximum outer diameter of the submersible pump, measure whether the inneldiameter of the wellbore can fit the submersible pump, and measure whether the well depth meets the installation requirements.
3. Check whether the wellbore is clean and whether the well water is turbid. Never use a submersible electric pump to wash the welor pump mud and sand water to avoid premature damage to the submersible electric pump.
4. Check whether the position of the welhead installation clamp is suitable and whether it can withstand the qualty of the entire unit
5. Check if the submersible pump components are complete and installed properly according to the assembly diagram in the manualRemove the filter screen and rotate the coupling to see if it rotates flexibly
6. Unscrew the water screw and fillthe motor cavity with clean, non corrosive water (note. be sure to fil it up), then tighten the waterscrew. After 12 hours of water injection, the insulation resistance of the motor should not be less than 150M Q when measured witha 500V shaking table.
7. Cable joint, cut off a 120mm rubber sleeve from one end of the outgoing cable and the matching cable with an electrician's knifethen stagger the length of the three core wires in a stepped shape, peel off a 20mm copper core, scrape of the oxide layer on theoutside of the copper wire with a knife or sand cloth, and insert the two connected wire ends in palirs.After tying the layer tightly with fine copper wire, solder it thoroughly and firmly, and sand of any. burrs on the surface. Then, forthe three joints, use polyvester insulation tape to wrap them in a semi stacked manner for three lavers. Wrap the two ends of thewrapping layer tightywith nyion thread,and then use a semi stacked method to wrap the tape for three layers. Wrap the outellayer with high-pressure insulation tape for three layers. Finally, fold the threestrands together and repeatedly wrap them for fivelayers with high-pressure tape. Each layer must be tightly tied, and the interlayer joints must be tight and fimm to prevent water frompenetrating and damaging the insulation, After wrapping, soak in water at room temperature of 20 ’c for 12 hours, and measurethe insulation resistance with a shaking table, which should not be less than 100M Ω

The attached cable wiring process diagram is as follows:

8. Use a multimeter to check whether the three-phase wires are connected and whether the DC resistance is approximately balanced.
9. Check whether the circuit and transformer capacity are overloaded, and then connect the overload protection switch or starting equipment. See Table 2 for specific models, and thenPour a bucket of water into the water pump from the water pump outlet to lubricate the rubber bearings in the pump, and then place the submersible electric pump upright and steady.Start (no more than one second) and check whether the steering direction is consistent with the steering sign. If not, swap any two connectors of the three-phase cable.Then install the filter and prepare to go down the well. If used in special occasions (such as ditches, ditches, rivers, ponds, ponds, etc.), the electric pump must be reliably grounded.

(2)Installation equipment and tools:
1. One pair of lifting chains for more than two tons.
2. A tripod with a vertical height of no less than four meters.
3. Two hanging ropes (wire ropes) that can bear a weight of more than one ton (can bear the weight of a complete set of water pumps).
4. Install two pairs of clamps (splints).
5. Wrenches, hammers, screwdrivers, electrical tools and instruments, etc.

(3)Electric pump installation:
1. The installation diagram of the submersible electric pump is shown in Figure 2. The specific installation dimensions are shown in Table 3 "List of Installation Dimensions of the Submersible Electric Pump".

2. Submersible electric pumps with a head less than 30 meters can be hoisted directly into the well using hoses and wire ropes or other hemp ropes that can bear the full weight of the entire machine, water pipes, and water in the pipes.

3. Pumps with a head of more than 30 meters use steel pipes, and the installation sequence is as follows:
①Use a clamp to clamp the upper end of the water pump part (the motor and water pump have been connected at this time), lift it with a hanging chain, and slowly tie it into the well untilPut the clamp on the wellhead and remove the hanging chain.
② Use another pair of clamps to clamp a pipe, lift it with a hanging chain 15 cm away from the flange, and lower it slowly. Between pipe flange and pump flangePut the rubber pad in place and tighten the pipe and pump evenly with bolts, nuts and spring washers.
③ Lift the submersible pump slightly, remove the clamp on the upper end of the water pump, tie the cable firmly to the water pipe with a plastic tape, and slowly tie it down until The clamp is placed at the wellhead.
④Use the same method to tie all water pipes into the well.
⑤After the lead-out cable is connected to the control switch, it is connected to the three-phase power supply.

(4)Things to note during installation:
1. If a jamming phenomenon is found during the pumping process, turn or pull the water pipe to overcome the jamming point. If various measures still do not work, pleaseDo not force the pump down to avoid damage to the submersible electric pump and the well.
2. During installation, a rubber pad should be placed at the flange of each pipe and tightened evenly.
3. When the water pump is lowered into the well, it should be placed in the middle of the well pipe to prevent the pump from running against the well wall for a long time, causing the pump to vibrate and the motor to sweep and burn.
4. Determine the depth of the water pump to the bottom of the well according to the flowing sand and silt conditions of the well. Do not bury the pump in the mud. The distance from the water pump to the bottom of the well is generally not less than 3 meters (see Figure 2).
5. The water entry depth of the water pump should be no less than 1-1.5 meters from the dynamic water level to the water inlet node (see Figure 2). Otherwise, the water pump bearings may be easily damaged.
6. The lift of the water pump cannot be too low. Otherwise, a gate valve needs to be installed on the wellhead water pipeline to control the pump flow at the rated flow point to prevent the motor from being overloaded and burned out due to large flow rates.
7. When the water pump is running, the water output should be continuous and even, the current should be stable (under rated working conditions, generally no more than 10% of the rated current), and there should be no vibration or noise. If there is any abnormality, the machine should be stopped to find out the cause and eliminate it.
8. When installing, pay attention to the setting of the motor grounding wire (see Figure 2). When the water pipe is a steel pipe, lead it from the wellhead clamp; when the water pipe is a plastic pipe, lead it from the grounding mark of the electric pump.

1. 1.After the submersible electric pump is installed, recheck the insulation resistance and three-phase continuity from the switch, and check whether there are any errors in the connection of the instruments and starting equipment. If there are no problems, you can start the test machine. After starting, observe whether the indication readings of each instrument are correct. If the rated voltage and current specified on the nameplate are exceeded, observe whether the water pump has any noise or vibration. If everything is normal, it can be put into operation.
   2. Four hours after the water pump is operated for the first time, the motor should be stopped and the thermal insulation resistance tested quickly. The value should be no less than 0.5 megohms.
   3．After the water pump is stopped, it should be restarted after an interval of five minutes to prevent the water column in the pipe from flowing back completely and causing the motor to burn out due to excessive current.
   4. After the water pump is put into normal operation, in order to extend its service life, it is necessary to regularly check whether the power supply voltage, operating current and insulation resistance are normal. If the following conditions are found, the machine should be shut down immediately to eliminate the fault.
2. 
   ①Under rated working conditions, the current exceeds 20%.
   ② The dynamic water level drops to the water inlet section, causing intermittent water discharge.
   ③The submersible pump vibrates violently or makes loud noise.
   ④The power supply voltage is lower than 340 volts.
   ⑤One phase of the fuse is burned out.
   ⑥The water pipe is damaged.
   ⑦The thermal insulation resistance of the motor to the ground is less than 0.5 megohms.
3. 
   5. Unit disassembly:
   ① Untie the cable tether, remove the pipeline part, and remove the wire protection plate.
   ② Unscrew the water drain bolt and drain all the water in the motor cavity.
   ③Remove the filter and loosen the fixing screw on the coupling that fixes the motor shaft.
   ④ Unscrew the bolts connecting the water inlet section and the motor, and separate the water pump from the motor (pay attention to leveling the unit when separating to prevent the pump shaft from bending)
   ⑤The water pump disassembly sequence is: (see Figure 1) water inlet section, impeller, diversion shell, impeller... check valve body. When disassembling the impeller, use a special tool to first loosen the tapered sleeve that fixes the impeller. Avoid disassembly during the disassembly process. Bend the pump shaft and damage various parts.
   ⑥The motor disassembly process is: (See Figure 1) Place the motor on the platform, and remove the nuts, bases, shaft head locking nuts, thrust plates, keys, and lower guides on the stud bolts (tie rod bolts) in sequence from the bottom of the motor. bearing seat, stud bolts, and then take out the rotor (be careful not to
   If the wire package is damaged), finally remove the connecting section and upper guide bearing seat.
   ⑦Unit assembly:
   Before assembly, all parts should be cleaned of rust and dirt, and all mating surfaces and fasteners should be coated with sealant, and then assembled in the reverse order of disassembly (the amount of movement of the motor shaft after assembly is about one millimeter). After completion, the coupling should be flexible, and then put the filter on to test the machine.
4. 
   6． Every time the submersible electric pump is operated for one year, or if it is operated for less than one year but has been submerged for two years, it should be disassembled and inspected in accordance with Article 5 to replace worn parts.

 1, put out the water in the motor cavity (especially in winter to prevent the motor from freezing), and tie the cable well.

 2, store in an indoor room without corrosive substances and gases, with a temperature below 40 °C.

 3, long-term use should pay attention to the rust prevention of submersible pumps.

01 Deep well water intake

02 High-rise water supply

03 mountain water supply 

04 tower water

05 Agricultural irrigation

06 garden irrigation

07 river water intake

08 domestic water