What are the problems of sand pumps uses?

2021-12-09 09:19:55 Source: sand dredge pump-slurry pump parts-China Do Pump

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What are the problems of sand pumps uses?

Sand dredge pumps are highly used for dredging projects for sand dredging and piping, which are acting as the heart of the dredging equipment, therefore, what are the problems of sand pumps uses, and how to solve the sand pump problems? China Do Pump is a professional manufacturer on sand pump, dredge pump, booster pump, electric submersible sand pump and hydraulic submersible pump, and we are going to discuss the problems in this article. 


Water conservancy digging and filling unit has simple equipment and convenient use. The process of digging, loading, transporting and filling can be completed at the same time, so the efficiency is high, the cost is low, and it has the advantages of good engineering quality, and the construction is not affected by the weather. It is now widely used in the excavation of aquaculture plants along beaches; sand lifting, dredging, and embankment of lakes and rivers; reconstruction of low-lying land; large, medium and small water conservancy projects; basic farmland construction and underground projects. Scope of application: Sedimentation tanks, fish ponds dredging and pumping silt, sand lifting, dredging, and embankment of lakes and rivers. Renovation of low-lying land. The sand carrier unloads the sand. There is a lot of sand on the beach or land, and less water is pumped out. Even if it is emptied, it will not affect the use and does not need to be drained. Structural features The pump is composed of pump body, impeller, guard plate, motor frame and bearing assembly. The shaft seal of the pump is sealed with a rubber skeleton oil seal. The direction of rotation of the pump is counterclockwise when viewed from the direction of the impeller inlet. The auxiliary impeller is used to reduce the back pressure of the impeller and prolong the life of the seal. The flow parts are made of white wear-resistant cast iron, which is resistant to abrasion.

After the sand pump is fixed at the work site, you should first check whether the prime mover main shaft and the pump main shaft are on the same axis. If they are different, they should be adjusted accurately. The water inlet and outlet pipes of the pump should have bearing support to prevent the pipeline gravity from being applied to the pump body. The pipeline installation should extend outward from the pump inlet and outlet flanges, and immediately support the positioning. When the mud pump is working, high-pressure clean water must be injected into the packing chamber to protect the shaft seal assembly. The high-pressure clean water pump must not be turned off during the normal operation of the main pump. The clean water pressure should be greater than the working pressure of the mud pump. Packing chamber components will wear out quickly without high-pressure clean water protection. The suction stroke in the pump performance table refers to the anti-cavitation characteristics of the pump under the condition of normal temperature and clean water. When pumping mud and sand, the inlet pressure of the pump should be as positive as possible. When the sediment contains large solid particles, the flow head of the pump will also be affected, and the medium condition should be considered when selecting the model. When replacing wearing parts such as impellers and lining plates, the gap between the impeller and the front and rear lining plates should be adjusted. The size of the axial gap between the impeller and the lining plates has a greater impact on the performance and service life of the pump. Please fill the bearing parts with lubricating grease in time. When the pump has abnormal vibration, noise and bearing temperature rise during work, it should be shut down for inspection.

1. The drive belt of the sand pump is worn out. Many large-scale marine sand pumps use belt transmission. Due to long-term use, the transmission belt is worn and loose, and slipping occurs, which reduces the pump speed.

2. Human factors. Most users, due to the damage of the original electric motor, arbitrarily equipped with another electric motor to drive. As a result, the flow rate is low, the lift is low, and the sand cannot be pumped.
3. The submersible sand pump has a mechanical failure. The impeller and pump shaft fastening nut is loose or the pump shaft is deformed and bent, causing the impeller to move too much, directly rubbing against the pump body, or bearing damage, which may reduce the speed of the submersible sand pump.

4. Improper installation of sand pump. The center distance between the two pulleys is too small or the two shafts are not parallel, the tight side of the transmission belt is installed on it, resulting in too small wrap angle, the calculation of the diameter of the two pulleys, and the large eccentricity of the two shafts of the coupling drive water pump, etc., will cause the water pump The speed changes.

The blockage of marine sand pumps and submersible sand pumps must be due to air in the inlet pipe and pump body:

1. There are cracks in the elbow of the inlet pipe, and there is a small gap between the inlet pipe and the sand pump, which may cause air to enter the inlet pipe.
2. Many users have not filled enough water before starting the sand pump; it seems that the water has overflowed from the vent, but the pump shaft is not rotated to completely exhaust the air, resulting in a little air remaining in the inlet pipe or pump body.
3. The water inlet pipe of the submersible sand pump is exposed to holes due to long-term diving, and the water surface drops continuously after the sand pump works. When these holes are exposed to the water surface, air enters the water inlet pipe from the holes.

4. The sand pump packing has worn out due to long-term use or the packing pressure is too loose, causing a large amount of water to be sprayed from the gap between the packing and the pump shaft sleeve. As a result, external air enters the water pump from these gaps, which affects sand pumping.

For more information about sand pump china, china dredge pump, submersible sand pump, What are the problems of sand pumps uses?, contact China Do Pump at info@dopumpgroup.com or call us at +8615031104888.

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