Protective submersible pump

Abstract

The utility model provides a protective submersible pump, and belongs to the field of pumps. The problem that an existing submersible pump is prone to collision in a deep well is solved. The protective submersible pump comprises a pump body, a plurality of fixing rings are arranged at intervals in the axial direction of the outer portion of the pump body, a plurality of guiding devices are arranged at intervals in the circumferential direction of the outer portions of the fixing rings, each guiding device comprises a connecting base, a guiding wheel and a guiding assembly, and each guiding assembly comprises a guiding column, a guiding cylinder, a spring and a limiting necking opening. One end of the guide column is fixed on the connecting seat and is of an integrally-formed structure, the other end of the guide column is a T-shaped end, the T-shaped end of the guide column movably penetrates into the guide cylinder and can axially move along the inner wall of the guide cylinder, the limiting necking opening is formed in the position, corresponding to the T-shaped end, in the guide cylinder, and the two ends of the spring abut against the connecting seat and the limiting necking opening respectively. The utility model has the advantage of radial buffering and guiding.

Description

Technical Field

[0001] This utility model belongs to the field of pumps, and relates to a submersible pump, and particularly to a protective submersible pump. Background Technology

[0002] Submersible pumps are important equipment for deep well water extraction. Most existing submersible pumps do not have anti-collision structures. When the submersible pump is lowered into the deep well for operation, it is easy to collide with the inner wall of the deep well, which will damage the submersible pump and seriously affect its service life. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a protective submersible pump to solve these problems.

[0004] The purpose of this utility model can be achieved through the following technical solution: a protective submersible pump, including a pump body, characterized in that a plurality of fixing rings are axially spaced along the outside of the pump body, and a plurality of guide devices are circumferentially spaced outside the fixing rings.

[0005] The guiding device includes a U-shaped connecting seat, a guide wheel that is rolled on the opposite connecting seat and rolls against the inner wall of the deep well, and a guiding assembly for driving the guide wheel to radially elastically buffer.

[0006] The guide assembly is located between the fixed ring and the connecting seat;

[0007] The guide assembly includes a movable guide post, a guide cylinder fixed outside the fixed ring, a spring sleeved outside the guide post, and a limiting constriction for limiting the axial movement of the guide post. One end of the guide post is fixed to the connecting seat and is an integrally formed structure, and the other end is a T-shaped end.

[0008] The T-shaped end of the guide post is movably inserted into the guide cylinder and can move axially along its inner wall. The limiting constriction is located inside the guide cylinder at the position corresponding to the T-shaped end.

[0009] The two ends of the spring abut against the connecting seat and the limiting constriction, respectively.

[0010] The guide wheel achieves radial elastic buffering by using a combination of guide post, guide cylinder, limiting constriction and spring structure to adapt to the unevenness of the deep well inner wall.

[0011] In the aforementioned protective submersible pump, the limiting constriction inside the guide cylinder is a radially inwardly extending annular protrusion, the inner diameter of which is smaller than the outer diameter of the T-shaped end of the guide post.

[0012] In the aforementioned protective submersible pump, the T-shaped end of the guide column is clearance-fitted with the inner wall of the guide cylinder.

[0013] In the aforementioned protective submersible pump, the spring is a compression spring, which is normally pre-tightened and pressed against the connecting seat and the limiting constriction.

[0014] In the aforementioned protective submersible pump, the U-shaped opening of the connecting seat faces away from the pump body axis, and the guide wheel is horizontally installed in the U-shaped opening via a rotating shaft.

[0015] Compared with existing technologies, this protective submersible pump achieves the core functions of vibration resistance, self-adaptation, and anti-jamming in deep wells through the triple design of spring buffer, sliding guide column, and mechanical limit, significantly improving the reliability and lifespan of the equipment under complex working conditions, and is suitable for scenarios with harsh well wall conditions such as mining and geothermal industries. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of this protective submersible pump.

[0017] Figure 2 This is a partially enlarged cross-sectional schematic diagram of the protective submersible pump.

[0018] In the diagram, 1 is the pump body; 2 is the retaining ring; 3 is the guide device; 4 is the connecting seat; 5 is the guide wheel; 6 is the guide column; 7 is the guide cylinder; 8 is the spring; and 9 is the limiting constriction. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2As shown, this protective submersible pump includes a pump body 1. Multiple retaining rings 2 are axially spaced along the outside of the pump body 1. Multiple guide devices 3 are circumferentially spaced around the outside of the retaining rings 2. Each guide device 3 includes a U-shaped connecting seat 4, a guide wheel 5 that is rolled on the opposite connecting seat 4 and rolls against the inner wall of the deep well, and a guide assembly for radially elastically buffering the guide wheel 5. The guide assembly is located between the retaining rings 2 and the connecting seat 4. The guide assembly includes a movable guide post 6, a guide cylinder 7 fixed to the outside of the retaining rings 2, and a spring 8 sleeved on the outside of the guide post 6. The guide post 6 has a limiting constriction 9 for restricting the axial movement of the guide post 6. One end of the guide post 6 is fixed to the connecting seat 4 and is an integrally formed structure. The other end is a T-shaped end. The T-shaped end of the guide post 6 is movably inserted into the guide cylinder 7 and can move axially along its inner wall. The limiting constriction 9 is located inside the guide cylinder 7 at the position corresponding to the T-shaped end. The two ends of the spring 8 abut against the connecting seat 4 and the limiting constriction 9, respectively. Through the structural cooperation of the guide post 6, the guide cylinder 7, the limiting constriction 9 and the spring 8, the radial elastic buffer of the guide wheel 5 is realized to adapt to the unevenness of the inner wall of the deep well.

[0021] The limiting constriction 9 inside the guide cylinder 7 is a radially inwardly extending annular protrusion, the inner diameter of which is smaller than the outer diameter of the T-shaped end of the guide post 6. The T-shaped end of the guide post 6 is clearance-fitted with the inner wall of the guide cylinder 7. The spring 8 is a compression spring, which is pre-tightened and pressed against the connecting seat 4 and the limiting constriction 9 under normal conditions. The U-shaped opening of the connecting seat 4 faces away from the axis of the pump body 1, and the guide wheel 5 is horizontally installed in the U-shaped opening via a rotating shaft.

[0022] Working principle

[0023] The guide wheel 5 is mounted on the U-shaped connecting seat 4 via a rotating shaft, directly contacting the inner wall of the deep well. When the pump body 1 is running in the well, the unevenness of the well wall will generate radial impact force on the guide wheel 5. The impact force is transmitted to the guide post 6, and the T-shaped end of the guide post 6 slides axially within the guide cylinder 7, compressing the spring 8. The spring 8 absorbs the impact energy, providing elastic cushioning. When the impact force disappears, the spring 8 releases its stored energy, pushing the guide post 6 to reset, so that the guide wheel 5 always remains in contact with the well wall.

[0024] The inner diameter of the limiting constriction 9 inside the guide cylinder 7 is smaller than the outer diameter of the T-shaped end of the guide post 6. When the guide post 6 retracts to its limit position, the T-shaped end is blocked by the limiting constriction 9, preventing the spring 8 from being over-compressed and failing, and also preventing the guide post 6 from coming out of the guide cylinder 7.

[0025] The guide post 6 and the inner wall of the guide cylinder 7 are fitted with a clearance to ensure smooth sliding. The preload of the spring 8 keeps the guide wheel 5 in close contact with the well wall, achieving dynamic radial buffering.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A protective submersible pump, comprising a pump body (1), characterized in that, Multiple fixing rings (2) are spaced apart along the outer axial direction of the pump body (1), and multiple guide devices (3) are spaced apart circumferentially outside the fixing rings (2). The guiding device (3) includes a U-shaped connecting seat (4), a guide wheel (5) that is rolled on the opposite connecting seat (4) and rolls against the inner wall of the deep well, and a guiding assembly for driving the guide wheel (5) to radially elastically buffer. The guide assembly is located between the fixed ring (2) and the connecting seat (4); The guide assembly includes a movable guide post (6), a guide cylinder (7) fixed outside the fixed ring (2), a spring (8) sleeved outside the guide post (6), and a limiting constriction (9) for limiting the axial movement of the guide post (6). One end of the guide post (6) is fixed to the connecting seat (4) and is an integral molded structure, and the other end is a T-shaped end. The T-shaped end of the guide post (6) is movably inserted into the guide cylinder (7) and can move axially along its inner wall. The limiting constriction (9) is located inside the guide cylinder (7) at the position corresponding to the T-shaped end. The two ends of the spring (8) abut against the connecting seat (4) and the limiting constriction (9) respectively; The guide wheel (5) is radially elastically buffered by the combination of the guide post (6), guide cylinder (7), limiting constriction (9) and spring (8) structure to adapt to the unevenness of the inner wall of the deep well.

2. The protective submersible pump according to claim 1, characterized in that, The limiting constriction (9) inside the guide cylinder (7) is a radially inwardly extending annular protrusion, the inner diameter of which is smaller than the outer diameter of the T-shaped end of the guide post (6).

3. A protective submersible pump according to claim 1, characterized in that, The T-shaped end of the guide post (6) is fitted with the inner wall of the guide cylinder (7) with a clearance.

4. A protective submersible pump according to claim 1, characterized in that, The spring (8) is a compression spring (8), which is pre-tightened and pressed between the connecting seat (4) and the limiting constriction (9) under normal conditions.

5. A protective submersible pump according to claim 1, characterized in that, The U-shaped opening of the connecting seat (4) faces away from the axis of the pump body (1), and the guide wheel (5) is installed laterally in the U-shaped opening through a rotating shaft.

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