A self-cleaning wear-resistant multi-stage centrifugal pump based on mine drainage

Abstract

The present invention relates to the technical field of centrifugal pumps, and discloses a self-cleaning, wear-resistant multi-stage centrifugal pump based on mine drainage, comprising a pump body, a water inlet arranged at one end of the pump body, and a water outlet arranged at the other end of the pump body, wherein a pump shaft is arranged inside the pump body, and an impeller is arranged on the pump shaft; a filter box is arranged on the water inlet, a filter plate is arranged on the inner side of the filter box, and an adjustment plate located on the side of the filter plate close to the pump body is movably connected to the inner side of the side wall of the filter box. The self-cleaning, wear-resistant multi-stage centrifugal pump based on mine drainage realizes automatic cleaning through the coordinated work of the adjustment plate, the guide groove and the traction assembly, and the traction assembly drives the adjustment plate to reciprocately adjust the inner diameter of the water inlet: when the diameter is reduced, the flow rate suddenly increases, causing a transient high-pressure pulse, which directly impacts the impeller, guide vanes and the inner wall of the pump body to strip off impurities; the pressure is restored after resetting, and the periodic reduction and resetting form a pulse pressure flushing.

Description

Technical Field

[0001] The present invention relates to the field of centrifugal pumps, and in particular to a self-cleaning, wear-resistant multi-stage centrifugal pump based on mine drainage. Background Art

[0002] In mine drainage operations, multi-stage centrifugal pumps transport high-solid content, highly abrasive slurry or sewage for a long time. The inner wall of the pump body and the surface of the impeller are easily attached with mud, mineral debris and other foreign matter. These attachments will not only reduce the cross-sectional area of ​​the flow channel, resulting in a significant decrease in head and efficiency, but may also cause vibration or cavitation due to local flow imbalance, accelerating equipment wear. In addition, to prevent large particles of impurities from entering the pump body and causing impeller breakage or seal damage, a fixed filter plate is usually installed at the water inlet end to intercept impurities. However, the sediment on the filter plate and the inner wall of the pump will accumulate over time. If not cleaned regularly, it will lead to increased water inlet resistance, reduced flow, or even complete blockage, seriously affecting the continuity and reliability of the drainage system.

[0003] Currently, cleaning of the filter plates mainly relies on manual disassembly and cleaning after shutdown or an external high-pressure water backwash system. The existing manual cleaning method is time-consuming and labor-intensive, and frequent shutdowns significantly reduce operating efficiency and increase maintenance costs. In addition, traditional methods cannot achieve self-cleaning of the flow path in the pump. Sediments will continue to accumulate in key areas such as the impeller and guide vanes, resulting in irreversible performance degradation.

[0004] Therefore, it is necessary to propose a self-cleaning wear-resistant multi-stage centrifugal pump based on mine drainage to solve the above problems. Summary of the Invention

[0005] The present invention proposes a self-cleaning wear-resistant multi-stage centrifugal pump based on mine drainage, which solves the problem of inconvenience in cleaning the interior of the pump body and the filter plate structure in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A self-cleaning, wear-resistant multi-stage centrifugal pump for mine drainage, comprising a pump body, a water inlet at one end of the pump body, and a water outlet at the other end of the pump body; a pump shaft is disposed inside the pump body, and an impeller is disposed on the pump shaft;

[0008] A filter box is provided on the water inlet, a filter plate is provided on the inner side of the filter box, an adjustment plate is movably connected to the inner side of the side wall of the filter box and is located on the side of the filter plate close to the pump body, an arc-shaped guide groove is provided at one end of the adjustment plate, and a traction component for driving the adjustment plate to move back and forth is provided at the lower end of the pump body;

[0009] The traction assembly includes a transmission housing arranged at the lower end of the pump body, a driving wheel is rotatably provided at one end of the inner side of the transmission housing, and a reduction gear meshed with the driving wheel is rotatably provided at the other end. A sliding plate is movably provided above one end of the transmission housing close to the reduction gear, and a first guide groove corresponding to the adjustment plate and inclined is provided on the sliding plate. A first guide shaft extending to the inside of the first guide groove is provided at the bottom of one end of the adjustment plate, a pulling arm is rotatably provided at one end of the top of the reduction gear, and the other end of the pulling arm is rotatably connected to the bottom of the sliding plate. A docking assembly is provided at the lower end of the pump body for controlling the linkage between the driving wheel and the lower end of the pump shaft when cleaning is required.

[0010] Preferably, the docking assembly includes a polygonal column-shaped follower shaft vertically movably connected to the inner side of the middle of the driving wheel, the lower end of the pump shaft corresponds to the follower shaft, and the lower end of the pump shaft is provided with a slot adapted to the follower shaft, and the upper end of the follower shaft is used to plug and cooperate with the slot, and a lifting frame is vertically movably provided on the inner side of the lower end of the pump body, which is located below the transmission housing and corresponds to the follower shaft, and the lower end of the follower shaft is rotatably set at the upper end of the lifting frame through a bearing, and the side wall of the lifting frame is provided with a second guide groove, and the end of the second guide groove close to the driving source is inclined, and the lower end of the lifting frame is horizontally movably connected to a lifting seat, and the side wall of the lifting seat is provided with a second guide shaft movably matched with the second guide groove, and a driving source for driving the lifting seat to move is provided on one side of the lower end of the pump body.

[0011] Preferably, the second guide shaft and the inclined end of the second guide groove are configured so that when the lifting seat drives the second guide shaft to move horizontally, the lifting frame can move longitudinally.

[0012] Preferably, the end of the second guide groove away from the driving source is horizontal, and the horizontal portion and the inner wall of the inclined portion are smoothly transitioned.

[0013] Preferably, a guide assembly is provided at the upper end of the rotating shaft, and the guide assembly includes a clamping shaft provided on the side wall of the upper end of the rotating shaft, and the upper end diameter of the rotating shaft is smaller than the lower end diameter, and the lower end side wall of the pump shaft is provided with a clamping groove adapted to the clamping shaft, and the lower end of the clamping groove is provided with an inverted "V"-shaped guide port.

[0014] Preferably, there are at least two filter plates, and the pore size of the filter plate close to the pump body is smaller than the pore size of the filter plate far from the pump body.

[0015] Preferably, the filter plate is V-shaped.

[0016] Preferably, a boosting pipe is provided on one side of the water outlet, and the other end of the boosting pipe is connected to the filter box. The connection part between the boosting pipe and the filter box is located between the filter plate and the adjustment plate, and the end of the boosting pipe close to the filter box is inclined toward the direction of the pump body.

[0017] Preferably, the end of the water inlet away from the pump body is connected to a cleaning medium inlet.

[0018] Preferably, control valves are provided on the boost pipe and the cleaning medium inlet.

[0019] Preferably, a spoiler assembly is provided on the pump shaft, and the spoiler assembly includes an inner shaft movably connected to the inner side of the pump shaft along the axial direction of the pump shaft, and the lower end of the inner shaft extends to the inner side of the slot at the lower end of the pump shaft, and is rotatably connected with the lower end of the inner shaft along the upper end of the rotating shaft through a bearing, and the inner side of the side wall of the pump shaft is movably connected along the radial direction of the pump shaft with a spoiler block located between adjacent impellers, and the side wall of the inner shaft is provided with a driving slope corresponding to the spoiler block, and the side of the driving slope facing the spoiler block is an inclined surface, and the spoiler block is movably connected to the inclined surface through a guide rail.

[0020] Preferably, the inner wall of the filter box is provided with a waste drain groove corresponding to the end of the filter plate, and the waste drain groove is arranged vertically. The bottom of the filter box is detachably provided with a collection box connected to the waste drain groove.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This self-cleaning, wear-resistant multi-stage centrifugal pump for mine drainage achieves automatic cleaning through the coordinated work of an adjustment plate, a guide groove, and a traction assembly. The traction assembly drives the adjustment plate to reciprocate and adjust the inner diameter of the water inlet: when the diameter is reduced, the sudden increase in flow velocity triggers a transient high-pressure pulse, which directly impacts the impeller, guide vanes, and the inner wall of the pump body to remove impurities; after reset, the pressure is restored, and periodic reduction and reset form a pulse pressure scouring; the synchronous guide groove guides part of the high-speed water flow to reversely flush the filter plate to remove attached impurities, combining the self-cleaning function of the pump flow channel and the filter plate backwash function without the need for shutdown or external energy.

[0023] 2. This self-cleaning, wear-resistant multi-stage centrifugal pump based on mine drainage is linked to the docking of the driving wheel and the pump shaft through the provided spoiler assembly. When docked, the spoiler block protrudes from the side wall of the pump shaft and rotates with the pump shaft, which can disrupt the normal conveying path of the cleaning medium and generate turbulent flow of the cleaning medium. As a result, the cleaning medium will impact the inner wall of the pump body, facilitating the detachment of attachments and further improving the automatic cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0025] Figure 1 Schematically shows the structural diagram of the present invention;

[0026] Figure 2Schematically shows a structural diagram of the present invention from another perspective;

[0027] Figure 3 Schematically shows the structure of the pump shaft, water inlet, transmission housing and pump body of the present invention in a disassembled state;

[0028] Figure 4 The present invention is schematically shown Figure 3 Schematic diagram of the structure after the boost pipe is removed from the foundation;

[0029] Figure 5 The schematic diagram shows the structure of the transmission housing and the filter box of the present invention in a separated state;

[0030] Figure 6 The present invention is schematically shown Figure 5 A structural diagram from another perspective based on the above;

[0031] Figure 7 Schematically shows the structural diagram of the interior of the filter box of the present invention;

[0032] Figure 8 The schematic diagram of the top cross-sectional structure of the filter box of the present invention is shown;

[0033] Figure 9 The schematic diagram shows the structure of the driving wheel, reduction gear and transmission housing of the present invention in a separated state;

[0034] Figure 10 The schematic diagram of the structure of the present invention in the disassembled state of the driving wheel, the rotating shaft, the lifting frame and the lifting seat is shown schematically;

[0035] Figure 11 The cross-sectional structure diagram of the lower end of the pump shaft of the present invention is schematically shown.

[0036] Numbers in the figure: 1. Pump body; 2. Water inlet; 3. Water outlet; 4. Filter box; 5. Booster pipe; 6. Cleaning medium inlet; 7. Transmission housing; 8. Pump shaft; 9. Impeller; 10. Collecting box; 11. Slide plate; 12. First guide groove; 13. First guide shaft; 14. Driving source; 15. Containing shell; 16. Filter plate; 17. Adjusting plate; 18. Guide groove; 19. Waste discharge chute; 20. Reduction gear; 21. Driving wheel; 22. Pulling arm; 23. Lifting seat; 24. Second guide shaft; 25. Lifting frame; 26. Second guide groove; 27. Following shaft; 28. Clamping slot; 29. ​​Guide port; 30. Clamping shaft; 31. Inner shaft; 32. Spoiler; 33. Driving slope. DETAILED DESCRIPTION

[0037] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0038] According to one embodiment of the present invention, Figures 1-11 Shown.

[0039] like Figures 1-10 As shown, a self-cleaning wear-resistant multi-stage centrifugal pump based on mine drainage includes a pump body 1, a water inlet 2 arranged at one end of the pump body 1 and a water outlet 3 arranged at the other end of the pump body 1. A pump shaft 8 is arranged inside the pump body 1, and an impeller 9 is arranged on the pump shaft 8. The impeller 9 is coated, such as spraying ceramic coating and nitriding treatment, which can increase the hardness and wear resistance of the surface, effectively resist the wear of the liquid, and overcome the technical problems of easy corrosion and wear. A filter box 4 is connected to the water inlet 2, and a filter box 4 is arranged inside the filter box 4. There are at least two filter plates 16, and the aperture of the filter plate 16 close to the pump body 1 is smaller than the aperture of the filter plate 16 away from the pump body 1. The filter plate 16 is "V" shaped, with both ends inclined. The inclined filter plate 16 significantly improves the filtration and self-cleaning efficiency by optimizing the fluid dynamics: its inclination angle is 30°-60°, so that large particles slide along the plate surface under the action of gravity or water flow, avoiding accumulation in the center, and the inclined structure diverts the fluid into tangential and normal components, reducing direct impact pressure loss, while In order to increase the effective filtration area, the side wall of the filter box 4 is provided with a accommodating shell 15 connected to the filter box 4. The inner side of the accommodating shell 15 is movably connected with an adjusting plate 17 that can extend to the inner side of the filter box 4, and the adjusting plate 17 is located on the side of the filter plate 16 close to the pump body 1. In order to ensure the sealing between the adjusting plate 17 and the accommodating shell 15, a sealing ring is provided on the outer wall of the adjusting plate 17, and an arc-shaped guide groove 18 is provided at one end of the adjusting plate 17. A traction component for driving the adjusting plate 17 to move back and forth is provided at the lower end of the pump body 1. The cleaning medium is pressurized, and a boosting pipe 5 is provided on one side of the water outlet 3, and the other end of the boosting pipe 5 is connected to the filter box 4. The connection part of the boosting pipe 5 and the filter box 4 is located between the filter plate 16 and the adjustment plate 17, and the end of the boosting pipe 5 close to the filter box 4 is inclined toward the pump body 1. In order to supply the cleaning medium, a cleaning medium inlet 6 is provided on the end of the water inlet 2 away from the pump body 1. Control valves are provided on the boosting pipe 5 and the cleaning medium inlet 6. The control valve is preferably an electrically controlled valve.

[0040] As a preferred embodiment of the traction assembly, the traction assembly includes a transmission housing 7 arranged at the lower end of the pump body 1, one end of the inner side of the transmission housing 7 is rotatably provided with a driving wheel 21, and the other end is rotatably provided with a reduction gear 20 engaged with the driving wheel 21. The diameter of the reduction gear 20 is larger than the diameter of the driving wheel 21. A sliding plate 11 is movably provided above one end of the transmission housing 7 near the reduction gear 20 through a guide rail. A first guide groove 12 corresponding to the adjustment plate 17 and inclined is provided on the sliding plate 11. A first guide shaft 13 extending to the inside of the first guide groove 12 is provided at the bottom of one end of the adjustment plate 17. The reduction gear One end of the top of 20 is provided with a pulling arm 22 through a pin shaft, and the other end of the pulling arm 22 is rotatably connected to the bottom of the sliding plate 11 through a pin shaft. The lower end of the pump body 1 is provided with a docking assembly for controlling the driving wheel 21 to be linked with the lower end of the pump shaft 8 when cleaning is required. As a preferred embodiment, the docking assembly includes a vertically movably connected to the inner side of the middle of the driving wheel 21 and in a polygonal column shape. The lower end of the pump shaft 8 corresponds to the rotating shaft 27, and the lower end of the pump shaft 8 is provided with a slot adapted to the rotating shaft 27. The upper end of the rotating shaft 27 is used to plug and cooperate with the slot. The lower end of the pump body 1 is provided with a slot adapted to the rotating shaft 27. The side is vertically movable with a lifting frame 25 located below the transmission housing 7 and corresponding to the rotating shaft 27, and the lower end of the rotating shaft 27 is rotatably arranged at the upper end of the lifting frame 25 through a bearing. The side wall of the lifting frame 25 is provided with a second guide groove 26. The end of the second guide groove 26 close to the driving source 14 is inclined. The lower end of the lifting frame 25 is horizontally movably connected to the lifting seat 23. The side wall of the lifting seat 23 is provided with a second guide shaft 24 that movably cooperates with the second guide groove 26. The second guide shaft 24 is configured at one end inclined with the second guide groove 26 as follows: when the lifting seat 23 drives the second guide shaft 24 to move horizontally, the lifting frame 25 can be vertically movable. The second guide groove 26 is horizontal at one end away from the driving source 14, and the inner wall of the horizontal part and the inclined part are smoothly transitioned. The horizontal part can stably support the lifting frame 25. A driving source 14 for driving the displacement of the jacking seat 23 is provided on one side of the lower end of the pump body 1. The driving source 14 can be manual or automatic. If it is automatic, a cylinder or a linear motor or other devices that can be linearly displaced can be selected. If it is manual, it can be a screw that is threaded with the side wall of the lower end of the pump body 1. One end of the screw is rotatably arranged with the side wall of the jacking seat 23, thereby driving the jacking seat 23 to move by rotating the screw.

[0041] like Figure 10-11 As shown, in order to ensure that the upper end of the rotating shaft 27 can quickly enter the slot at the lower end of the pump shaft 8, a guide assembly is provided at the upper end of the rotating shaft 27, and the guide assembly includes a clamping shaft 30 provided on the side wall of the upper end of the rotating shaft 27, and the upper end diameter of the rotating shaft 27 is smaller than the lower end diameter, and the lower end side wall of the pump shaft 8 is provided with a clamping groove 28 adapted to the clamping shaft 30, and the lower end of the clamping groove 28 is provided with an inverted "V"-shaped guide port 29.

[0042] In addition, if Figure 11 As shown, in order to further improve the cleaning effect, a spoiler assembly is provided on the pump shaft 8, which includes an inner shaft 31 movably connected to the inner side of the pump shaft 8 along the axial direction of the pump shaft 8, and the lower end of the inner shaft 31 extends to the inner side of the slot at the lower end of the pump shaft 8, and the upper end of the rotating shaft 27 is rotatably connected to the lower end of the inner shaft 31 through a bearing, so that when the pump shaft 8 is not clean, the rotation of the inner shaft 31 drives the rotation of the inner shaft 31, and the inner shaft 31 can rotate relative to the rotating shaft 27. Only when the thicker part of the rotating shaft 27 is inserted into the slot can synchronous rotation be achieved. The inner side wall of the pump shaft 8 is movably connected to the spoiler block 32 located between adjacent impellers 9 along the radial direction of the pump shaft 8, and the side wall of the inner shaft 31 is provided with a driving slope 33 corresponding to the spoiler block 32. The side of the driving slope 33 facing the spoiler block 32 is an inclined surface, and the spoiler block 32 is movably connected to the inclined surface through a guide rail.

[0043] like Figure 5-Figure 6 、 Figure 8 As shown, in order to facilitate the collection of impurities, a waste drain groove 19 corresponding to the end of the filter plate 16 is provided on the inner wall of the filter box 4. The waste drain groove 19 is vertically arranged, and a collection box 10 connected to the waste drain groove 19 is detachably provided at the bottom of the filter box 4.

[0044] During use, if cleaning is required, the control valve on the cleaning medium inlet 6 is opened to connect the cleaning medium, and the driving source 14 is controlled to drive the lifting seat 23 to move. The lifting seat 23 drives the second guide shaft 24 to move in the second guide groove 26. When the inclined part of the second guide groove 26 moves, the lifting frame 25 drives the rotating shaft 27 to rise. With the card shaft 30 and the guide port 29, the rotating shaft 27 can quickly enter the slot at the lower end of the pump shaft 8. The card shaft 30 is finally stuck in the upper end of the card groove 28, and then the second guide shaft 24 enters the horizontal end of the second guide groove 26, thereby supporting the lifting frame 25. At this time, the pump shaft 8 and the pump body 1 can rotate coaxially, and since the rotating shaft 27 rises, the rotating shaft 27 will push upward. The dynamic inner shaft 31 rises synchronously, and the driving slope 33 drives the spoiler 32 to protrude from the side wall of the pump shaft 8, controls the operation of the pump shaft 8, and uses the impeller 9 to rotate and extract the cleaning medium. Then, the control valve on the boost pipe 5 is opened, and the liquid discharged from the water outlet 3 can be partially diverted to the boost pipe 5, and enters the filter box 4 through the boost pipe 5 to achieve pressurization. When the pump shaft 8 rotates, it will drive the driving wheel 21 to rotate, and the driving wheel 21 drives the reduction gear 20 to rotate. The reduction gear 20 pulls the sliding plate 11 back and forth through the pulling arm 22, and then the sliding plate 11 realizes the back and forth movement of the adjustment plate 17 through the cooperation of the first guide groove 12 and the first guide shaft 13. The inner diameter of the water inlet 2 is adjusted by the back and forth movement state. Its cleaning principle Based on the transient pressure fluctuation effect in fluid dynamics, when the regulating plate 17 shrinks, the cross-sectional area of ​​the water inlet 2 decreases and the flow rate increases sharply. At this time, the kinetic energy of the fluid increases, and the rapid shrinking action and the inertia of the fluid will trigger a transient high-pressure pulse similar to the water hammer effect, which directly impacts the impeller 9, the guide vanes and the inner wall of the pump body 1, peeling off the attached impurities. Then the regulating plate 17 resets and expands the inner diameter, the flow rate decreases, the pressure recovers, and the periodic action forms a pulse-type pressure fluctuation. At the same time, when the diameter is reduced, part of the water flow from the water inlet 2 will backwash the filter plate 16 under the guidance of the guide groove 18 to facilitate the separation of impurities. Moreover, since the filter plate 16 is tilted, its tilt angle causes large particles to slide along the plate surface under the action of gravity or water flow, avoiding impurities in the middle The center accumulates, and the inclined structure diverts the fluid into tangential and normal components, reducing the direct impact pressure loss and increasing the effective filtration area at the same time. Moreover, during backwashing, the inclined surface is more likely to form eddy currents or guide scouring, stripping off impurities on the plate surface. It is especially suitable for intercepting and self-cleaning easy-to-block media such as fiber and sticky sludge in high-solid content mine drainage. The backwashed impurities can fall into the collection box 10 through the waste discharge trough 19 for collection. In addition, due to the protrusion of the spoiler block 32, the spoiler block 32 rotates with the pump shaft 8, which can break the normal conveying path of the cleaning medium and generate turbulence in the cleaning medium, so that the cleaning medium will impact the inner wall of the pump body 1, which is convenient for the separation of attachments and further improves the automatic cleaning effect.

[0045] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A self-cleaning, wear-resistant multi-stage centrifugal pump for mine drainage, characterized by: The pump comprises a pump body, a water inlet arranged at one end of the pump body and a water outlet arranged at the other end of the pump body, a pump shaft is arranged inside the pump body, and an impeller is arranged on the pump shaft; A filter box is provided on the water inlet, a filter plate is provided on the inner side of the filter box, an adjustment plate is movably connected to the inner side of the side wall of the filter box and is located on the side of the filter plate close to the pump body, an arc-shaped guide groove is provided at one end of the adjustment plate, and a traction component for driving the adjustment plate to move back and forth is provided at the lower end of the pump body; The traction assembly includes a transmission housing arranged at the lower end of the pump body, one end of the transmission housing is rotatably provided with a driving wheel, and the other end is rotatably provided with a reduction gear meshed with the driving wheel, and a sliding plate is movably provided above one end of the transmission housing close to the reduction gear, and a first guide slot corresponding to the adjustment plate and inclined is provided on the sliding plate. A first guide shaft extending to the inside of the first guide slot is provided at the bottom of one end of the adjustment plate, and a pulling arm is rotatably provided at one end of the top of the reduction gear, and the other end of the pulling arm is rotatably connected to the bottom of the sliding plate. The lower end of the pump body is provided with a docking assembly for controlling the driving wheel to be linked with the lower end of the pump shaft when cleaning is required; The docking assembly includes a polygonal column-shaped follower shaft vertically movably connected to the inner side of the middle of the driving wheel, the lower end of the pump shaft corresponds to the follower shaft, and the lower end of the pump shaft is provided with a slot adapted to the follower shaft, and the upper end of the follower shaft is used to plug and cooperate with the slot, and a lifting frame is vertically movably provided on the inner side of the lower end of the pump body, which is located below the transmission housing and corresponds to the follower shaft, and the lower end of the follower shaft is rotatably arranged at the upper end of the lifting frame through a bearing, and the side wall of the lifting frame is provided with a second guide groove, and the end of the second guide groove close to the driving source is inclined, and the lower end of the lifting frame is horizontally movably connected to a lifting seat, and the side wall of the lifting seat is provided with a second guide shaft movably matched with the second guide groove, and a driving source for driving the lifting seat to move is provided on one side of the lower end of the pump body.

2. A self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 1, characterized in that: The second guide shaft and the inclined end of the second guide groove are configured such that when the lifting seat drives the second guide shaft to move horizontally, the lifting frame can move longitudinally.

3. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 1, characterized in that: The end of the second guide groove away from the driving source is horizontal, and the horizontal portion and the inner wall of the inclined portion are smoothly transitioned.

4. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 1, characterized in that: A guide assembly is provided at the upper end of the rotating shaft, and the guide assembly includes a clamping shaft provided on the side wall of the upper end of the rotating shaft, and the upper end diameter of the rotating shaft is smaller than the lower end diameter, and the lower end side wall of the pump shaft is provided with a clamping groove adapted to the clamping shaft, and the lower end of the clamping groove is provided with an inverted "V"-shaped guide port.

5. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 1, characterized in that: There are at least two filter plates, and the pore size of the filter plate close to the pump body is smaller than the pore size of the filter plate far from the pump body.

6. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 5, characterized in that: The filter plate is in a "V" shape.

7. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 1, characterized in that: A boosting pipe is provided on one side of the water outlet, and the other end of the boosting pipe is connected to the filter box. The connection part between the boosting pipe and the filter box is located between the filter plate and the adjustment plate, and the end of the boosting pipe close to the filter box is inclined toward the direction of the pump body.

8. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 7, characterized in that: An end of the water inlet away from the pump body is connected to a cleaning medium inlet.

9. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 8, characterized in that: The boost pipe and the cleaning medium inlet are both provided with control valves.

10. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 4, characterized in that: The pump shaft is provided with a spoiler assembly, which includes an inner shaft movably connected to the inner side of the pump shaft along the axial direction of the pump shaft, and the lower end of the inner shaft extends to the inner side of the slot at the lower end of the pump shaft, and is rotatably connected with the lower end of the inner shaft along the upper end of the rotating shaft through a bearing, and the inner side of the side wall of the pump shaft is movably connected with a spoiler block located between adjacent impellers along the radial direction of the pump shaft, and the side wall of the inner shaft is provided with a driving slope corresponding to the spoiler block, and the side of the driving slope facing the spoiler block is an inclined surface, and the spoiler block is movably connected to the inclined surface through a guide rail.

11. The self-cleaning wear-resistant multi-stage centrifugal pump for mine drainage according to claim 6, characterized in that: The inner wall of the filter box is provided with a waste drain groove corresponding to the end of the filter plate, and the waste drain groove is arranged vertically. The bottom of the filter box is detachably provided with a collection box connected to the waste drain groove.

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