Sand prevention structure of submersible electric pump for well

Abstract

The utility model relates to a sand-proof structure of a submersible electric pump for a well. The sand-proof structure is composed of a sand-proof cap fixing screw, a spring washer and a sand-proof cap. The sand-proof cap is provided with a sand-proof cap fixing hole, a sand-proof cap first plane, a sand-proof cap second inclined plane and a sand-proof cap third vertical plane. Wherein a sand-proof cap fixing screw penetrates through the sand-proof cap fixing hole to connect the sand-proof cap with the pump shaft; the first plane diameter of the sand-proof cap is greater than that of the pump shaft; the second slope of the sand-proof cap completely covers the rubber bearing, the shaft sleeve and the pump shaft at the lower part to protect gaps among the rubber bearing, the shaft sleeve and the pump shaft, and meanwhile, the angle design of the slope does not cause interference between the sand-proof cap and other parts; and the third vertical surface of the sand-proof cap effectively prevents silt in the submersible pump for the well from entering gaps among the rubber bearing, the shaft sleeve and the pump shaft, so that the protectiveness is more complete and comprehensive. The sand-proof submersible pump has the advantages of being reasonable in design, simple in structure and convenient to assemble, and solves the sand blocking phenomenon when the submersible pump dives into deep water to work through a simple sand-proof structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal pumps and relates to a structural design of a well-used submersible electric pump for agricultural irrigation and domestic water use, in particular to a sand-proof structure of a well-used submersible electric pump. Background Art

[0002] Currently, existing domestic submersible electric pumps are designed for deep wells, where sediment can cause significant damage to the bearings and rubber bearings. This can cause wear and tear, shortening the life of the rubber bearings. In severe cases, the pump shaft can become stuck, damaging both the pump and the motor, shortening the pump's service life. To address this issue, this article describes a sand-blocking structure for submersible electric pumps. This solution utilizes a simple, easy-to-assemble, and low-cost sand-blocking cap. Utility Model Content

[0003] The utility model overcomes the above-mentioned defects and solves the sand jamming phenomenon of the submersible pump when working in deep water through a simple anti-sand structure.

[0004] This utility model features a sand-proof structure for a submersible well pump, characterized by its upper structure consisting of a water outlet nozzle, a pin holder, a rubber bearing, a bushing, a retaining ring, an O-ring, screws, a pump shaft, and a sand-proof cap. The water in deep wells contains a large amount of sediment, and the impact of the water flow causes severe wear on the rubber bearings. The sand-proof cap, shaped like a parasol, is simple in structure and provides comprehensive protection for the gaps around the rubber bearings. The cap is only 0.5 mm thick, lightweight, simple to connect, and suitable for mass production and assembly.

[0005] Before installation, tap the top of the pump shaft. There is a fixing hole on the upper part of the sand cap. Use the sand cap fixing screws to fasten the sand cap to the pump shaft to ensure that the sand cap fits completely with the end face of the pump shaft.

[0006] Furthermore, a spring washer is provided between the sand-proof cap and the fixing screw of the sand-proof cap to ensure that the screw will not loosen.

[0007] Furthermore, the sand cap has a first flat surface, a second inclined surface, and a third vertical surface. The inner wall of the first flat surface is in close contact with the pump shaft end face. Its diameter is larger than the pump shaft diameter, completely covering the shaft and ensuring a more complete contact surface, preventing the shaft from falling off during high-speed operation. The second inclined surface completely covers the rubber bearing, sleeve, and pump shaft at the bottom, protecting them from the gaps between them. The angle of this surface also prevents interference between the cap and other components. The third vertical surface effectively prevents mud and sand from the submersible pump from entering the gaps between the rubber bearing, sleeve, and pump shaft, providing more complete and comprehensive protection. The cap is also made of 304 stainless steel for enhanced wear resistance.

[0008] Compared with the existing technology, the beneficial effects of this technical solution are as follows:

[0009] 1. The sand-proof cap of the utility model is uniquely designed, with an inclined surface and a vertical surface, which can effectively prevent mud and sand from entering the gap between the rubber bearing, the sleeve and the pump shaft, thereby protecting the rubber bearing from wear and tear and increasing the service life of the submersible pump.

[0010] 2. The sand-proof cap of the utility model is made of 304 stainless steel, which has better wear resistance and extends the service life of the sand-proof cap.

[0011] 3. The sand-proof cap of the utility model is connected to the pump shaft by screws, which has a simple connection method, is convenient for mass production and has a low cost. Compared with the complex structure in the prior art, the manufacturing cost is greatly reduced.

[0012] 4. The anti-sand cap design of the utility model can effectively protect the uncertainty of sediment flow in the well submersible pump and increase the service life of the rubber bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the new submersible pump for sand prevention.

[0014] Figure 2 This is the parts diagram of the sand cap.

[0015] In the figure: 1-sand-proof cap fixing screw, 2-washer, 3-retaining ring, 4, sand-proof cap, 41, sand-proof cap fixing hole, 41, first plane of sand-proof cap; 4, second inclined surface of sand-proof cap; 4, third vertical surface of sand-proof cap; 5, bushing; 6, rubber bearing; 7, pin fixing body; 8, pump shaft; 9, screw; 10, O-ring. DETAILED DESCRIPTION

[0016] The utility model single-stage centrifugal pump is realized in this way, and is described in detail below with reference to the accompanying drawings. Figure 1As shown, the submersible pump is composed of a water outlet, a pump shaft 8, a pin fixing body 7, a rubber bearing 6, a shaft sleeve 5, an O-type rubber ring 10, and a screw 9. The utility model is a well submersible electric pump anti-sand structure composed of: a sand cap fixing screw (1), a washer (2), and a sand cap (4).

[0017] Before installation, tap the top of the pump shaft 8. A fixing hole 41 is opened on the upper part of the sand-proof cap 4. Use the sand-proof cap fixing screw 1 to fasten the sand-proof cap 4 to the pump shaft 8 to ensure that the sand-proof cap 4 is completely in contact with the end face of the pump shaft 8.

[0018] Furthermore, a spring washer 2 is provided between the sand-proof cap 4 and the sand-proof cap fixing screw 1 to ensure that the sand-proof cap fixing screw 1 does not loosen.

[0019] Furthermore, the sand cap 4 is provided with a first flat surface 42, a second inclined surface 43, and a third vertical surface 44. The inner wall of the first flat surface 42 is in close contact with the end face of the pump shaft 8. The diameter of the first flat surface 42 is larger than that of the pump shaft 8, so that it completely covers the pump shaft 8, ensuring a more complete contact surface between the two and preventing the sand cap 4 from falling off when the pump shaft 8 runs at high speed. The second inclined surface 43 completely covers the rubber bearing 6, the sleeve 5, and the pump shaft 8 at the bottom. Since there is a gap between the three, the second inclined surface 43 of the sand cap protects them. At the same time, the angle of this inclined surface prevents the sand cap 4 from interfering with other parts. The third vertical surface 44 of the sand cap effectively prevents irregular mud and sand in the well submersible pump from entering the gap between the rubber bearing 6, the sleeve 5, and the pump shaft 8, making the protection more complete and comprehensive.

Claims

1. A sand prevention structure for a submersible electric pump for a well, characterized in that: The sand-proof cap is composed of three parts: a sand-proof cap fixing screw (1), a spring washer (2), and a sand-proof cap (4); a hole is tapped at the end of the pump shaft (8), and the sand-proof cap (4) is connected to the pump shaft (8) using the sand-proof cap fixing screw (1).

2. A sand-proof structure for a submersible electric pump for a well according to claim 1, characterized in that: A washer (2) is provided between the sand-proof cap (4) and the pump shaft (8).

3. The anti-sand structure for a submersible electric pump for a well according to claim 1, characterized in that: The sand-proof cap (4) is provided with a sand-proof cap fixing hole (41), a first sand-proof cap plane (42), a second sand-proof cap inclined plane (43), and a third sand-proof cap vertical plane (44); wherein the diameter of the first sand-proof cap plane (42) is greater than the diameter of the pump shaft (8).

4. The anti-sand structure for a submersible electric pump for a well according to claim 1, characterized in that: The sand-proof cap (4) is made of 304 stainless steel and has a thickness of 0.5 mm.

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