Why can t the pump pump

Measure your voltage, maybe the voltage drop is too large, causing the motor speed to drop; Observe the water level in the well, whether the water level has changed;

I think that the air should be pumped out first, and if you don't add water, when you press the pole to pump the air, the air molecules are very small, and they will leak through the small gap between the rubber and the inner wall, so that the air cannot be pumped out.

But after adding water, when pulling up, first, the water and eraser are not easy to leak through the gap, and second, the air still comes up when you go downstairs. Suppose 20 centimeters of high air, you pump out 10 cm once, the water surface is pulled up by you 10 centimeters, and then quickly put it down, pull it again, the air is pumped out, and then as soon as the water starts to flow out, you don't care about the air.

If you don't pump it, the water will flow down, and the air will be sucked down through the gap, and at this time the rubber ring and cement pipe will be wet, and there will be a sizzling sound until the water returns to its normal water level.

Expansion: The suction stroke of a pump with a head of 70 meters is not necessarily enough for 40 meters. If the pump is located underwater and cannot pump water, please check whether the circuit and pump are in good condition, if the pump is 40 meters away from the water surface, please check how many meters the suction lift indicated on the pump signage.

Generally speaking, the suction lift of a pump with a head of 70 meters will not be greater than 25 meters.

The reason why the pump can't pump the water is as follows:

1. It is possible that the air in the pump chamber is not completely drained, resulting in pressure imbalance, we can open the screws on the pump body to fill water and empty the air in the pump chamber.

2. It may be a leak in the inlet pipe, you can check the tightness of the joints and pipelines.

3. It is possible that the seal in the pump is leaking, and you can try to adjust, reinstall or replace the seal accessories in the pump.

4. It may be that the tee or the bottom valve is not opened, or there may be a blockage, and the flexibility of the tee can be tested.

How to repair the fault of the pump not pumping:

1. The causes of the violent vibration of the water pump include unbalanced electric rotor or poor coupling combination, bearing wear and bending, loose and cracked parts of the rotating parts, and unstable pipeline support. It can be adjusted, repaired, reinforced, straightened, replaced and other methods can be taken respectively.

2. The leakage or air leakage of the pipeline may be due to the fact that the screw cap is not tightened during installation. If the leakage is not serious, apply cement, wet mud or soft soap to the leakage area. If there is a leak in the joint, you can tighten the screw cap by hand. If the water leakage is serious, it must be reassembled.

3. The overheating of the packing is mostly caused by the packing pressing too tightly, the cooling water cannot enter the packing or the shaft surface is damaged. Measures such as appropriately relaxing the packing and cleaning up the sealing tube can be taken. Wear-out packing must be replaced with a new one, soaked in oil before installation, and loaded one by one.

The incisions should be staggered to reduce water leakage. After the last round of packing is loaded, the gland should be tightened, and the tightness should be adjusted when running.

4. The reason why the pump does not absorb water or does not drain water is mostly due to the jamming of the bottom valve, the silting of the water filter part, the water absorption height is too high or the water absorption leakage, which may also be caused by improper steering and blockage of the impeller channel. After passing the inspection one by one, measures such as repairing the foot valve, removing the blockage, correcting the steering, and cleaning the impeller can be taken separately.

There are generally two that the pump can't pump water:

1.Air is present in the inlet pipe and pump body.

2.The centrifugal speed pump speed in the metering diaphragm pump is too low.

The principle of pumping water from a water pump is as follows:

The impeller installed on the pump shaft rotates at high speed, and the force interaction between the blades and the conveyed liquid occurs, so that the liquid can obtain energy to achieve the purpose of conveying liquid.

According to the working principle of the impeller, vane pumps are divided into three basic types: centrifugal pumps, axial flow pumps and mixed-flow pumps. Centrifugal pumps are often used for horizontal pumps, and axial and mixed-flow pumps are often used for vertical pumps.

Centrifugal pump because the impeller is constantly rotating in the pump casing filled with water, the water between the blades on the impeller is centrifugal by the action of centrifugal force, rushes to the casing at a certain speed and pressure, flows into the outlet pipeline of the water pump through the flow channel in the casing, at the same time, the center of the impeller forms a vacuum, the water of the suction pipeline flows into the center of the impeller to fill the vacuum area under the action of atmospheric pressure, and the water that flows into the center of the impeller is subjected to the action of centrifugal force, and flows into the outlet pipeline of the pump through the casing. In this way, as long as the suction line can maintain the replenishment of water and the impeller keeps rotating, the process of continuous water transfer of the water pump is completed.

There can be a variety of reasons why a pump can't pump water, and here are some possible scenarios:

Leaking or clogged inlet pipes: If there is a leak or blockage in the inlet pipe, the pump can't pick up enough water to work properly.

Poor sealing of the water pump: If the water pump is not well sealed, there will be an imbalance of pressure in the pump casing, which will cause the pump to be unable to absorb water normally.

The suction height exceeds the maximum suction depth of the pump: Different types of pumps have different maximum suction depths, and if the suction height exceeds the maximum suction depth of the pump, the pump will not be able to absorb water.

Pump impeller blockage: If the pump impeller is clogged or there are foreign objects to enter, it will cause the pump to be unable to absorb water normally.

Incorrect Pump Direction: If the pump is running in the wrong direction, it will result in the pump not being able to suction water.

Insufficient power supply: If the power supply is insufficient, the pump will not function properly, which will also result in the inability to absorb water.

The above are some common reasons why the pump cannot pump water, and the specific reasons need to be analyzed according to the specific situation.

Reasons and solutions for the pump not being able to pump water.

1. The impeller rotates unbalanced, the coupling is not tight enough, and the parts are loose and broken, resulting in large vibration of the water pump. These problems can be solved by means of adjustments, reinforcements, repairs, or replacements.

2. The nut is not tightened during installation, resulting in water pipe leakage and air leakage. This is a good solution, if it is a slight leak, it will be blocked with cement and asphalt oil in the leakage, and if the leakage is more serious, it must be replaced or reinstalled.

3. Because the packing pressure is too solid, the cold water cannot enter the inside of the packing, or the table of the shaft has been damaged. Well, in this case, you just need to loosen the filler and clean up the clogged pipes.

4. The water in the pump is not full or there is air in the inlet pipeline. If this is the case, fill the water and pump the air out of the pipes.

There may be several reasons why the pump cannot pump water:

The distance between the pump and the water source is too far beyond the suction lift range of the pump;

There is a leak in the inlet pipe, which causes the pump to be unable to form a vacuum and be unable to absorb water;

The water inlet is blocked by debris, preventing water from entering the pump;

The impeller or blades of the pump are damaged, affecting the pump's ability to absorb water;

Water leaks inside the pump, causing the pump to be unable to form a vacuum and be unable to absorb water.

It needs to be troubled and treated on a case-by-case basis to ensure that the pump is working properly.

1. The filler is overheated.

Mostly because the packing is pressed too tightly, the cooling water cannot enter the packing, or the shaft surface is damaged. Measures such as appropriately relaxing the packing and cleaning up the sealing tube can be taken. Wear-out packing must be replaced with a new one. Before installation, soak in the oil and fill it in one circle at a time, and the cuts should be staggered, so as to reduce water leakage.

2. The water pump does not absorb water or drain water.

The reasons are mostly that the bottom valve is stuck, the water filter part is blocked, the water absorption height is too high or the water absorption is leaking, and it may also be due to the wrong steering, the impeller flow channel is blocked, etc. After passing the inspection one by one, measures can be taken to repair the foot valve, remove the blockage, correct the steering, and clean the impeller.

3. The pump vibrates violently.

It is possible that the electric rotor is unbalanced, or the coupling is poorly combined, and the bearing is worn and bent; It may also be loose or cracked in some parts; Maybe it's because the tubing bracket is not strong, etc. It can be dealt with by means of adjustment, repair, reinforcement and replacement.

4. Pipeline leakage or air leakage.

It is possible that the nut is not tightened during installation. If the leakage is not serious, cement or cement slurry mixed with asphalt oil can be applied to the area of air or water leakage. Temporary repairs can be made with some wet mud or soft soap cores.

5. Water leakage at the joint.

If there is a leak at the joint, the nut can be tightened by hand. If the water leakage is serious, it must be reassembled. After the last round of packing is loaded, the gland should be tightened, and the tightness should be adjusted when running.