Multi-stage pump for conveying mine well water

Abstract

The invention belongs to the technical field of multi-stage pump equipment, particularly relates to a multi-stage pump for conveying mine well water, and aims to solve the problem that the conventional multi-stage pump cannot be combined into a proper pump body according to different working conditions of a mine, the following scheme is provided: the multi-stage pump comprises a main pump box, and a main pump box end cover is fixed at one end of the main pump box through a bolt; four horizontally-arranged limiting lead screws are fixed to the other end of the main pump box, module pump boxes are installed on the outer walls of the four limiting lead screws, and multiple sets of module pump boxes can be installed according to conveying requirements. A structure capable of being combined and assembled is arranged, the module pump boxes are arranged, the number of the module pump boxes can be selected for assembly and use, in this way, different multi-stage pump combinations can be selected in mines with different depths, a plurality of module pump boxes can be selected for combination when the mines are deep, and larger centrifugal suction force is provided to meet the water conveying requirement; and only one module pump box can be selected to meet the water delivery requirement.

Description

Technical Field

[0001] This invention relates to the field of multistage pump equipment technology, and in particular to a multistage pump for conveying well water in mines. Background Technology

[0002] A multistage centrifugal pump is a combination of two or more centrifugal pumps with the same function. In terms of fluid channel structure, the medium pressure relief port of the first stage is connected to the inlet of the second stage, and the medium pressure relief port of the second stage is connected to the inlet of the third stage. This series connection mechanism forms a multistage centrifugal pump. The significance of a multistage centrifugal pump is to increase the set pressure.

[0003] For example, Chinese patent document CN118622712A discloses a multistage centrifugal pump, including a pump body and a drive motor for driving the pump body; the pump body includes a pump body shell and multiple single-stage shells, with guide vanes and rotatable impellers installed inside the single-stage shells via a pump shaft, and the multiple single-stage shells are connected in series with a sealed installation; a water spray mechanism is provided inside the single-stage shell; the above-disclosed technology has the following problems: In the current application of multistage pumps, multistage pump equipment is very common in the environment of mine water transportation, and can provide high... While there is a demand for suction, the environment in which mine water is used is unique, varying from mine to mine. Some mines are hundreds of meters deep, while others are only tens of meters deep. This limits the selection of multistage pumps. Current multistage pumps face a dilemma when choosing pumps for these conditions: multistage pumps for shallow mines have high energy consumption, while those for deep mines lack sufficient suction. Current multistage pumps cannot be combined to create suitable pump bodies for different mine conditions, and existing technology cannot easily solve this problem. Therefore, there is an urgent need for multistage pumps for mine water transportation to address these issues. Summary of the Invention

[0004] Based on the technical problem that current multistage pumps cannot be combined into suitable pump bodies according to different mine working conditions, this invention proposes a multistage pump for mine water transportation.

[0005] This invention proposes a multi-stage pump for conveying well water in mines, comprising a main pump box, one end of which is fixed with a main pump box end cover by bolts, and four horizontally arranged limiting screws fixed at the other end of the main pump box. Modular pump boxes are mounted on the outer walls of the four limiting screws, and multiple sets of modular pump boxes can be installed according to conveying requirements. A vertically arranged discharge pump box is mounted on the outer walls of the four limiting screws at the other end of the modular pump box. A centrifugal conveying chamber is formed in the middle of each modular pump box, and a rotating centrifugal impeller body is mounted at the center of the centrifugal conveying chamber. A rotating drive shaft is mounted between the main pump box end cover and the discharge pump box, and the drive shaft is plugged into and matched with the centrifugal impeller bodies mounted between the multiple sets of modular pump boxes. A drive shaft connector is fixed at one end of the drive shaft.

[0006] Preferably, a liquid inlet is provided on one side of the main pump box, and a liquid inlet pipe is fixed on one side of the main pump box at the liquid inlet position. The liquid inlet pipe is set with an inclined structure, and the inclined direction of the liquid inlet pipe is towards one end of the module pump box.

[0007] Preferably, a drainage chamber is provided in the middle of the drainage pump box, and a drainage port is provided in the middle of the top of the drainage pump box. The drainage port is connected to the drainage chamber inside the drainage pump box, and a vertically arranged drainage pipe is fixed at the drainage port on the top of the drainage pump box.

[0008] Preferably, a first bearing hole is provided in the middle of the main pump box end cover, and a first sealed bearing is installed in the first bearing hole of the main pump box end cover, and the drive shaft is inserted and installed with the first sealed bearing.

[0009] Preferably, a second bearing hole is provided in the middle of the drain pump box, a second sealed bearing is installed in the second bearing hole, the drive shaft is inserted into the second sealed bearing, a maintenance chamber is provided in the middle of the drain pump box, and a drain pump box end cover is fixed to the circumference of the maintenance chamber by bolts.

[0010] Preferably, the modular pump box and the drain pump box are provided with protrusions at the four corners, and each of the four corner protrusions has a limiting hole. The modular pump box and the drain pump box are matched and inserted with four limiting screws through the limiting holes of the four protrusions. The four corners of the drain pump box are fixed to the four limiting screws by bolts. The modular pump box, the drain pump box and the main pump box are squeezed and fixed together and kept sealed.

[0011] Preferably, a sealing ring is provided at the middle position of one end of both the modular pump box and the drain pump box, and a sealing ring groove is provided at the middle position of the other end of both the main pump box and the modular pump box. The sealing ring grooves and sealing rings between adjacent main pump boxes, modular pump boxes and drain pump boxes are matched and locked together to maintain a seal. A modular pump box sealing plate is fixed to one end of the modular pump box by bolts.

[0012] Preferably, the centrifugal conveying chamber inside the modular pump box has a variable diameter structure, and the aperture of the centrifugal conveying chamber is converging inward. The modular pump box has a liquid guiding chamber at the circumference of the centrifugal conveying chamber. The liquid guiding chamber is set as a liquid guiding chamber inlet at one end of the modular pump box and a liquid guiding chamber outlet at the other end of the modular pump box.

[0013] Preferably, the centrifugal impeller body includes a drive shaft column located in the middle position, the drive shaft column is inserted into the middle position of the drive shaft column, one end of the centrifugal impeller body is a liquid inlet end, and the outer wall of the drive shaft column at the liquid inlet end is fixed with circumferentially distributed liquid inlet blades, and a liquid inlet cavity is provided in the middle of the liquid inlet blades.

[0014] Preferably, the other end of the centrifugal impeller body is the liquid outlet end, and the liquid is discharged through the circumference of the centrifugal impeller body. The centrifugal impeller body is fixed with centrifugal blades arranged in a circumferential array inside the liquid outlet end, and a centrifugal infusion chamber is provided in the middle of the centrifugal blades.

[0015] The beneficial effects of this invention are as follows: This multistage pump for mine water transportation features a modular design that allows for assembly and combination. The number of modular pump boxes can be selected for assembly, enabling different multistage pump combinations to be chosen for mines of varying depths. In deeper mines, multiple modular pump boxes can be combined to provide greater centrifugal suction to meet water transportation needs, while in shallower mines, only one modular pump box can be selected to meet the water transportation requirements.

[0016] This multistage pump, used for conveying well water in mines, draws well water from the pump box and throws it out to the circumference, where it enters the centrifugal conveying chamber within the pump box. Because the centrifugal conveying chamber has an inwardly converging diameter variable structure at its circumference, the water flow within the centrifugal conveying chamber is directed towards the guide chamber. This allows the water ejected by centrifugation to be quickly discharged into the next pump box, thus improving the overall conveying efficiency of the multistage pump and reducing internal energy loss.

[0017] This multistage pump, used for well water transportation in mines, features an inclined inlet pipe design that optimizes the flow direction of the liquid, reducing energy loss during transportation and improving the pump's overall efficiency by aligning the liquid's direction of transport. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one end position of the overall structure of a multi-stage pump for conveying well water in mines, as proposed in this invention. Figure 2 This is a schematic diagram of the other end of the overall structure of a multi-stage pump for conveying well water in mines, as proposed in this invention. Figure 3 This is a schematic diagram of the first sealed bearing structure of a multi-stage pump for conveying well water in mines, as proposed in this invention. Figure 4 This is a schematic diagram of the structure of one end of a modular pump box of a multi-stage pump for conveying well water in mines, as proposed in this invention. Figure 5 This is a schematic diagram of the other end of the modular pump box of a multi-stage pump for conveying well water in mines, as proposed in this invention. Figure 6 This is a schematic diagram of the internal structure of a modular pump box for transporting well water in mines, as proposed in this invention. Figure 7 This is a partial cross-sectional schematic diagram of the centrifugal impeller body of a multi-stage pump for conveying well water in mines, as proposed in this invention.

[0019] In the diagram: 1. Main pump box; 2. Limiting screw; 3. Modular pump box; 4. Drain pump box; 5. Inlet pipe; 6. Drain pipe; 7. Main pump box end cover; 8. Drive shaft; 9. Drive shaft connector; 10. Drain pump box end cover; 11. First sealing bearing; 12. Sealing ring; 13. Drain chamber; 14. Sealing ring groove; 15. Maintenance chamber; 16. Second sealing bearing; 17. Drain outlet of the guide chamber; 18. Modular pump box sealing plate; 19. Centrifugal delivery chamber; 20. Centrifugal impeller body; 21. Inlet of the guide chamber; 22. Inlet blade; 23. Centrifugal blade; 24. Inlet chamber; 25. Centrifugal delivery chamber; 26. Drive shaft column. Detailed Implementation

[0020] Reference Figures 1-7A multistage pump for conveying well water in mines includes a main pump box 1. One end of the main pump box 1 is fixed with a main pump box end cover 7 by bolts. Four horizontally arranged limiting screws 2 are fixed at the other end of the main pump box 1. Modular pump boxes 3 are installed on the outer walls of the four limiting screws 2, and multiple sets of modular pump boxes 3 can be installed according to the conveying requirements. A vertically arranged discharge pump box 4 is installed on the outer walls of the four limiting screws 2 at the other end of the modular pump box 3. A centrifugal conveying chamber 19 is opened in the middle of the modular pump box 3, and a rotating centrifugal impeller body 20 is installed at the center of the centrifugal conveying chamber 19. A rotating drive shaft 8 is installed in the middle between the main pump box end cover 7 and the discharge pump box 4. The drive shaft 8 is plugged into and matched with the centrifugal impeller bodies 20 installed in the middle of the multiple sets of modular pump boxes 3. A drive shaft connector 9 is fixed at one end of the drive shaft 8. A motor for driving is installed with the drive shaft connector 9 at the end of the drive shaft 8 to provide power to the entire multistage pump.

[0021] Furthermore, a liquid inlet is provided on one side of the main pump box 1, and a liquid inlet pipe 5 is fixed on one side of the main pump box 1 at the liquid inlet position. The liquid inlet pipe 5 is set with an inclined structure, and the inclined direction of the liquid inlet pipe 5 is towards one end of the module pump box 3. The inclined structure design of the liquid inlet pipe 5 optimizes the flow direction of the liquid, reduces energy loss in the conveying process, and can also improve the conveying efficiency of the multi-stage pump along the direction of liquid conveying.

[0022] Furthermore, a drainage chamber 13 is provided in the middle of the drainage pump box 4, and a drainage port is provided in the middle of the top of the drainage pump box 4. The drainage port is connected to the drainage chamber 13 inside the drainage pump box 4, and a vertically arranged drainage pipe 6 is fixed at the drainage port on the top of the drainage pump box 4.

[0023] Furthermore, a first bearing hole is provided in the middle of the main pump box end cover 7, and a first sealed bearing 11 is installed in the first bearing hole of the main pump box end cover 7. The drive shaft rod 8 is inserted and installed with the first sealed bearing 11.

[0024] Furthermore, a second bearing hole is provided in the middle of the drain pump box 4, and a second sealed bearing 16 is installed in the second bearing hole of the drain pump box 4. The drive shaft 8 is inserted and installed with the second sealed bearing 16. A maintenance chamber 15 is provided in the middle of the drain pump box 4, and the drain pump box end cover 10 is fixed to the circumference of the maintenance chamber 15 by bolts.

[0025] Furthermore, each of the four corners of the modular pump box 3 and the drain pump box 4 is provided with a protrusion, and each of the four corner protrusions is provided with a limiting hole. The modular pump box 3 and the drain pump box 4 are matched and inserted with the four limiting screws 2 through the limiting holes of the four protrusions. The four corners of the drain pump box 4 are fixed with the four limiting screws 2 by bolts. The modular pump box 3, the drain pump box 4 and the main pump box 1 are squeezed and fixed and kept sealed. Each of the two pump boxes 3 and the drain pump box 4 is provided with a sealing ring 12 at the middle of one end. The other end of the main pump box 1 and the other end of the modular pump box 3 are provided with a sealing ring groove 14. The sealing ring grooves 14 and sealing rings 12 between adjacent main pump boxes 1, modular pump boxes 3 and drain pump boxes 4 are matched and locked and kept sealed. One end of the modular pump box 3 is fixed with a modular pump box sealing plate 18 by bolts.

[0026] Furthermore, the centrifugal conveying chamber 19 inside the modular pump box 3 has a variable diameter structure, and the aperture of the centrifugal conveying chamber 19 converges inward. A liquid guiding chamber is provided on the circumference of the centrifugal conveying chamber 19 in the modular pump box 3. One end of the liquid guiding chamber is set as the liquid guiding chamber inlet 21, and the other end of the liquid guiding chamber is set as the liquid guiding chamber outlet 17. Since the centrifugal conveying chamber 19 has a variable diameter structure that converges inward on the circumference, the water flow in the centrifugal conveying chamber 19 is directed towards the liquid guiding chamber, which can quickly guide the water ejected by centrifugation to the next modular pump box 3. This can improve the conveying efficiency of the entire multi-stage pump and reduce internal energy loss.

[0027] Furthermore, the centrifugal impeller body 20 includes a drive shaft column 26 located in the middle position, the drive shaft 8 is inserted into the middle position of the drive shaft column 26, one end of the centrifugal impeller body 20 is the liquid inlet end, and the drive shaft column 26 is fixed with circumferentially distributed liquid inlet blades 22 on the outer wall of the liquid inlet end, and the liquid inlet blades 22 are provided with a liquid inlet chamber 24 in the middle.

[0028] Furthermore, the other end of the centrifugal impeller body 20 is the liquid outlet end, and the liquid is discharged through the circumference of the centrifugal impeller body 20. The centrifugal impeller body 20 is fixed with centrifugal blades 23 arranged in a circumferential array inside the liquid outlet end, and a centrifugal infusion chamber 25 is provided in the middle of the centrifugal blades 23.

[0029] When using this invention: First, before use, select the appropriate number of modular pump boxes 3 according to the conveying requirements. Then, insert the required modular pump boxes 3 into the limiting screws 2 in sequence. Finally, install the end drain pump box 4 by plugging it in and locking it with four bolts to keep the drain pump box 4, modular pump boxes 3, and main pump box 1 sealed. During installation, insert the drive shaft 8 into the first sealed bearing 11 and the drive shaft column 26 of the centrifugal impeller body 20 in each modular pump box 3 through one end position, and finally plug it into the second sealed bearing 16. Then, install the motor and the drive shaft connector 9 at the end of the drive shaft 8 so that the motor can drive the multi-stage pump to run. The multi-stage pump draws in well water through the inlet pipe 5 and discharges it through the top. The well water is output through the drain pipe 6. During the multi-stage pumping process, well water is drawn into the main pump box 1 and enters one end of the first module pump box 3. The centrifugal impeller body 20 rotates and draws in well water through the inlet chamber 24 at one end and into the centrifugal delivery chamber 25. The other end of the centrifugal impeller body 20 has a larger diameter and a faster circumferential speed when rotating, which throws the drawn-in well water to the circumferential position and into the circumferential position of the centrifugal delivery chamber 19 in the module pump box 3. Since the circumferential position of the centrifugal delivery chamber 19 is a variable diameter structure that converges inward, the thrown-out well water enters the interior of the next module pump box 3 through the guide chamber, and is circulated sequentially until it is delivered to the last drain pump box 4. Well water is output through the drain pipe 6 at the top of the drain pump box 4.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage pump for conveying well water in mines, comprising a main pump box (1), one end of which is fixed with a main pump box end cover (7) by bolts, and four horizontally arranged limiting screws (2) fixed at the other end of the main pump box (1), characterized in that, A modular pump box (3) is installed on the outer wall of the four limiting screws (2), and multiple sets of modular pump boxes (3) can be installed according to the conveying requirements. A vertically arranged drain pump box (4) is installed on the outer wall of the four limiting screws (2) at the other end of the modular pump box (3). A centrifugal conveying chamber (19) is opened in the middle of the modular pump box (3), and a rotating centrifugal impeller body (20) is installed in the center of the centrifugal conveying chamber (19). A rotating drive shaft (8) is installed in the middle between the main pump box end cover (7) and the drain pump box (4). The drive shaft (8) is plugged into and matched with the centrifugal impeller body (20) installed in the middle of multiple sets of modular pump boxes (3). A drive shaft connector (9) is fixed at one end of the drive shaft (8). The centrifugal impeller body (20) includes a drive shaft column (26) located in the middle position. The drive shaft (8) is inserted into the middle position of the drive shaft column (26). One end of the centrifugal impeller body (20) is the liquid inlet end. The drive shaft column (26) is fixed with circumferentially distributed liquid inlet blades (22) on the outer wall of the liquid inlet end. The liquid inlet blades (22) are provided with a liquid inlet chamber (24) in the middle. The other end of the centrifugal impeller body (20) is the liquid outlet end. The liquid is discharged through the circumferential position of the centrifugal impeller body (20). The centrifugal impeller body (20) is fixed with circumferentially distributed centrifugal blades (23) inside the liquid outlet end. The centrifugal blades (23) are provided with a centrifugal infusion chamber (25) in the middle.

2. A multi-stage pump for conveying well water in mines according to claim 1, characterized in that, The main pump box (1) has an inlet on one side, and an inlet pipe (5) is fixed on one side of the main pump box (1) at the inlet. The inlet pipe (5) is set with an inclined structure, and the inclined direction of the inlet pipe (5) is towards one end of the module pump box (3).

3. A multi-stage pump for conveying well water in mines according to claim 2, characterized in that, The drain pump box (4) has a drain chamber (13) in the middle position and a drain outlet in the middle position of the top of the drain pump box (4). The drain outlet is connected to the drain chamber (13) in the drain pump box (4). A vertically arranged drain pipe (6) is fixed at the top of the drain pump box (4) at the drain outlet position.

4. A multi-stage pump for conveying well water in mines according to claim 1, characterized in that, The main pump box end cover (7) has a first bearing hole in the middle. The main pump box end cover (7) is equipped with a first sealed bearing (11) in the first bearing hole. The drive shaft (8) is inserted and installed with the first sealed bearing (11).

5. A multi-stage pump for conveying well water in mines according to claim 4, characterized in that, The drain pump box (4) has a second bearing hole in the middle. The drain pump box (4) is equipped with a second sealed bearing (16) in the second bearing hole. The drive shaft (8) is inserted into the second sealed bearing (16). The drain pump box (4) has a maintenance chamber (15) in the middle. The drain pump box (4) is sealed with a drain pump box end cover (10) by bolts at the circumference of the maintenance chamber (15).

6. A multi-stage pump for conveying well water in mines according to claim 1, characterized in that, The module pump box (3) and the drain pump box (4) are provided with protrusions at the four corners, and the protrusions at the four corners are provided with limit holes. The module pump box (3) and the drain pump box (4) are matched and inserted with the four limit screws (2) through the limit holes of the four protrusions. The four corners of the drain pump box (4) are fixed with the four limit screws (2) by bolts. The module pump box (3), the drain pump box (4) and the main pump box (1) are squeezed and fixed and kept sealed.

7. A multi-stage pump for conveying well water in mines according to claim 1, characterized in that, A sealing ring (12) is provided at the middle position of one end of the modular pump box (3) and the drain pump box (4). A sealing ring groove (14) is provided at the middle position of the other end of the main pump box (1) and the other end of the modular pump box (3). The sealing ring groove (14) and the sealing ring (12) between adjacent main pump boxes (1), modular pump boxes (3) and drain pump boxes (4) are matched and locked together and kept sealed. A modular pump box sealing plate (18) is fixed at one end of the modular pump box (3) by bolts.

8. A multi-stage pump for conveying well water in mines according to claim 1, characterized in that, The centrifugal conveying chamber (19) opened in the module pump box (3) has a variable diameter structure, and the aperture of the centrifugal conveying chamber (19) is converging inward. The module pump box (3) has a liquid guiding chamber at the circumference of the centrifugal conveying chamber (19). The liquid guiding chamber is set as the liquid guiding chamber inlet (21) at one end of the module pump box (3), and the liquid guiding chamber is set as the liquid guiding chamber outlet (17) at the other end of the module pump box (3).

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