A single-stage split-case centrifugal pump for conveying mine water

Abstract

The present invention belongs to the technical field of centrifugal pumps, in particular to a single-stage split centrifugal pump for conveying mine water. The following scheme is now proposed, including a pump body, an inlet pipe and an outlet pipe are connected to the pump body. The inlet pipe is provided with a front end and a rear end, and the rear end is located between the pump body and the front end. A partition is fixed at the middle position of the inner wall of the inlet pipe between the front end and the rear end. Extension pipes are communicated on both sides of the rear end, and a connecting pipe is communicated between the extension pipe and the front end. A filter element is arranged at a position close to the rear end in the extension pipe. The present invention retains solid impurities in the mine water through the filter element to avoid damage to the impeller in the pump body. At the same time, the water flow is dispersed to improve the filtering effect and some dispersible solid aggregates are crushed by counteracting, thereby effectively improving the effectiveness of the long-term use of the centrifugal pump and extending the service life of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal pumps, and in particular to a single-stage split centrifugal pump for transporting mine water. Background Art

[0002] The single-stage double-suction split centrifugal pump is a general-purpose impeller pump, and the pump suction operation is mainly realized by the impeller rotating in the pump body.

[0003] Referring to the Chinese patent with the publication number CN115853819A, a horizontal double-suction centrifugal pump supported by a water guide bearing is disclosed. A bearing cavity is provided at the throat position of the pump body and pump cover of this centrifugal pump to install a bearing group. A combination of a water guide bearing and a thrust bearing is used at the non-driving end, and a water guide bearing is used at the driving end. A polymer material is attached to the surfaces of the water guide bearing and the thrust bearing. Both the driving end and the non-driving end adopt a structure of introducing high-pressure water from the pump cover pressure chamber for cooling and lubrication; there is no shaft seal at the non-driving end, and a static seal method is adopted, and a mechanical seal is used at the driving end to seal the shaft.

[0004] However, in the process of pumping mine water using the above-mentioned patent and the conventional single-stage split centrifugal pump in the prior art, it is inevitable that solid impurities will be contained in the mine water, which easily enter the centrifugal pump and cause damage to the impeller. Summary of the Invention

[0005] Based on the technical problems in the background art, the present invention proposes a single-stage split centrifugal pump for transporting mine water.

[0006] A single-stage split centrifugal pump for transporting mine water proposed by the present invention includes a pump body, an inlet pipe and an outlet pipe are connected to the pump body. The inlet pipe is provided with a front end portion and a rear end portion. The rear end portion is located between the pump body and the front end portion. A partition is fixed at the middle position of the inner wall of the inlet pipe between the front end portion and the rear end portion. Extension pipes are communicated on both sides of the rear end portion, and a connecting pipe is communicated between the extension pipe and the front end portion. A filter member is arranged at a position close to the rear end portion in the extension pipe.

[0007] Preferably, openings are provided at both the top and bottom of the front end portion, and the two openings are respectively communicated with the two connecting pipes. The two connecting pipes are respectively located above and below the inlet pipe.

[0008] Preferably, the filter member is provided with a disc portion and an arc portion. The disc portion fits with the inner wall of the extension pipe. Mesh holes one are formed on the outer wall of the disc portion. The arc portion is fixed at a position of the disc portion close to the rear end portion. The arc portions of the two filter members are buckled into a cylindrical structure. The arc portion is adapted to the connection positions of the corresponding extension pipe and the connecting pipe. Mesh holes two are formed at the side position of the arc portion facing the pump body. The outer wall of the arc portion fits with the inner wall of the extension pipe.

[0009] Preferably, the end of the extension pipe away from the rear end is open, and a fixed shell is installed at the end of the extension pipe away from the rear end. A spring is fixed to the inner wall of the fixed shell. A sealing plate is installed at the end of the spring facing the extension pipe. The outer wall of the sealing plate is slidably sealed with the inner wall of the fixed shell. A leakage groove is formed at the bottom of the fixed shell.

[0010] Preferably, a horizontally placed driving rod is rotatably connected to the middle position of the fixed shell. One end of the driving rod is drivingly connected to a second motor. A sliding hole that slidably contacts the outer wall of the driving rod is formed in the middle position of the sealing plate. A threaded hole that is threadedly connected to the outer wall of the driving rod is formed in the middle position of the disc portion.

[0011] Preferably, two abutting blocks are fixed to the outer wall of the disc portion away from the arc portion. Horizontally extending sliding grooves are formed at positions corresponding to the abutting blocks on the inner wall of the extension pipe. The sliding grooves are open in the direction towards the fixed shell.

[0012] Preferably, a horizontally placed fixing rod is fixed to the central position of the partition plate facing the front end. Guide vanes are fixed to both the top and bottom of the fixing rod. One end of the guide vane close to the partition plate is inclined away from the fixing rod. The guide vane is arranged in an arc structure that arches outwards.

[0013] Preferably, guide shells are fixed to both inner walls of the front end. A flow guiding cavity is formed between the guide shell and the inner wall of the front end. Both ends of the flow guiding cavity are open.

[0014] Preferably, the part of the guide shell facing the guide vane is inclined, and the end of the guide shell close to the partition plate is inclined towards the guide vane. The inner wall of the bottom of the guide shell is inclined downwards away from the partition plate.

[0015] The beneficial effects in the present invention are as follows:

[0016] In the present invention, solid impurities in the mine water are retained by the filter element to avoid damage to the impeller in the pump body. At the same time, through the arrangement of the connecting pipe and the extension pipe, the water flowing into the front end is dispersed and flows out and then enters the rear end from both sides respectively, so as to disperse the water flow to improve the filtering effect and crush some dispersible solid aggregates through counterflow, thereby effectively improving the effectiveness of the long-term use of the centrifugal pump and extending the service life of the equipment.

[0017] In the present invention, through the periodic intermittent horizontal reciprocating movement of the two filter elements, the solid impurities are effectively discharged during the continuous pumping process, so as to improve the effectiveness of the long-term pumping operation and extend the service life of the equipment. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a single-stage split centrifugal pump for transporting mine water proposed by the present invention;

[0019] Figure 2 Schematic diagram of the position structure of the water inlet pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0020] Figure 3 Schematic diagram of the front view sectional structure of the water inlet pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0021] Figure 4 Schematic diagram of the side view sectional structure of the water inlet pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0022] Figure 5 Schematic diagram of the sectional structure of the position of the extension pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0023] Figure 6 Schematic diagram of the structure of the extension pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0024] Figure 7 Schematic diagram of the distribution structure of the drive rod and the filter element of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0025] Figure 8 Schematic diagram of the structure of the filter element of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0026] Figure 9 Schematic diagram of the front end structure of a single-stage split centrifugal pump for conveying mine water proposed by the present invention;

[0027] Figure 10 Schematic diagram of the guide vane and the guide shell of a single-stage split centrifugal pump for conveying mine water proposed by the present invention.

[0028] In the figure: 1 pump body, 2 first motor, 3 water inlet pipe, 301 front end part, 302 rear end part, 4 water outlet pipe, 5 partition plate, 6 connecting pipe, 7 extension pipe, 701 chute, 8 filter element, 801 disc part, 802 arc part, 803 first mesh hole, 804 second mesh hole, 9 drive rod, 10 second motor, 11 connecting sleeve, 12 fixed shell, 121 leakage groove, 13 spring, 14 sealing plate, 15 abutting block, 16 fixing rod, 17 guide vane, 18 guide shell, 19 mounting bracket. Specific embodiments

[0029] Example 1: Refer to Figures 1-8, A single-stage split-case centrifugal pump for conveying mine water, comprising a pump body 1. The end of the rotating shaft in the pump body 1 is drivingly connected to a first motor 2. An installation frame 19 is fixed below the pump body 1. A water inlet pipe 3 and a water outlet pipe 4 are connected to the pump body 1. The water inlet pipe 3 has a front end 301 and a rear end 302. The rear end 302 is located between the pump body 1 and the front end 301. A partition 5 is fixed at the middle position of the inner wall of the water inlet pipe 3 between the front end 301 and the rear end 302. The partition 5 is hermetically arranged with the inner wall of the water inlet pipe 3. Extension pipes 7 are communicated on both sides of the rear end 302. A connecting pipe 6 is communicated between the extension pipe 7 and the front end 301. A filter element 8 is arranged at a position close to the rear end 302 in the extension pipe 7. During use, the rear end 302 is communicated with the impeller chamber in the pump body 1 for pumping operation. Then, the rear end 302 is communicated with the front end 301 through the extension pipe 7 and the connecting pipe 6. After being connected by an external pipeline, the pumped mine water flows through the front end 301, the connecting pipe 6, the extension pipe 7 and the rear end 302 in sequence and enters the pump body 1. The solid impurities in the mine water are retained by the filter element 8 to avoid damage to the impeller in the pump body 1. At the same time, through the arrangement of the connecting pipe 6 and the extension pipe 7, the water flowing into from the front end 301 is dispersed and flows out and then enters the rear end 302 from both sides respectively, so as to disperse the water flow to improve the filtering effect and crush some dispersible solid aggregates by counteracting, thereby effectively improving the effectiveness of the long-term use of the centrifugal pump and extending the service life of the equipment.

[0030] In the present invention, referring to Figures 1-8 , openings are provided at both the top and bottom of the front end 301. The two openings are respectively communicated with the two connecting pipes 6. The two connecting pipes 6 are respectively located above and below the water inlet pipe 3. Thus, the two connecting pipes 6 are both arc-shaped and inclined in the horizontal direction relative to the water inlet pipe 3, thereby dispersing the water flow and reducing the impact of solid impurities, and further improving the filtering and retention effect of the filter element 8.

[0031] In the present invention, referring to Figures 1-8 , the filter element 8 is provided with a disc part 801 and an arc part 802. The disc part 801 is attached to the inner walls of the extension pipe 7 and the rear end 302. A first mesh hole 803 is formed on the outer wall of the disc part 801. The arc part 802 is fixed at a position of the disc part 801 close to the rear end 302. The arc parts 802 of the two filter elements 8 are buckled into a cylindrical structure. The two arc parts 802 are arranged vertically and horizontally. And the connection positions of the arc part 802 with the corresponding extension pipe 7 and the connecting pipe 6 are adapted. The length of the arc part 802 is greater than the diameter of the connecting pipe 6. A second mesh hole 804 is formed at the side position of the arc part 802 facing the pump body 1. The outer wall of the arc part 802 is attached to the inner walls of the extension pipe 7 and the rear end 302. The water flow entering the extension pipe 7 from the connecting pipe 6 enters the cylindrical cavity formed by the two filter elements 8 through the first mesh hole 803, and then enters the rear end 302 through the second mesh hole 804 and flows into the pump body 1, so as to improve the filtering effectiveness of the shunt.

[0032] In the present invention, with reference to Figures 1-8 , the end of the extension pipe 7 away from the rear end portion 302 is provided with an opening. A fixed shell 12 is installed at the end of the extension pipe 7 away from the rear end portion 302. A seal is provided between the fixed shell 12 and the extension pipe 7. A spring 13 is fixed to the inner wall of the fixed shell 12. A sealing plate 14 is installed at the end of the spring 13 facing the extension pipe 7. The outer wall of the sealing plate 14 is in sliding seal with the inner wall of the fixed shell 12. The sealing plate 14 is in contact with the end of the extension pipe 7. A leakage groove 121 is formed at the bottom of the fixed shell 12. A horizontally placed driving rod 9 is rotatably connected to the middle position of the fixed shell 12. One end of the driving rod 9 is drivingly connected to a second motor 10. The housing of the second motor 10 is fixed to the outer wall of the fixed shell 12. The output shaft of the second motor 10 is connected to the driving rod 9 through a coupling. A sliding hole that slidably contacts the outer wall of the driving rod 9 is formed at the middle position of the sealing plate 14. A threaded hole that is threadedly connected to the outer wall of the driving rod 9 is formed at the middle position of the disc portion 801. A connecting sleeve 11 is provided between the two driving rods 9. The driving rod 9 is rotatably connected to the connecting sleeve 11. Two abutting blocks 15 are fixed to the outer wall of the disc portion 801 away from the arc portion 802. Horizontally extending sliding grooves 701 are formed at the positions on the inner wall of the extension pipe 7 corresponding to the abutting blocks 15. The abutting blocks 15 are in sliding contact with the inner walls of the sliding grooves 701. The sliding grooves 701 are provided with openings facing the fixed shell 12. The filter element 8 can be horizontally moved in the corresponding extension pipe 7 by rotating the driving rod 9 through the second motor 10. In the normal state, the two filter elements 8 are both in the position close to the rear end portion 302 and are buckled to form a cylindrical structure for filtering operation, and the sealing plate 14 is in close contact and sealed with the end of the extension pipe 7 under the action of the spring 13;

[0033] During long-term use, the filter element 8 is periodically and horizontally moved outwards at intervals. One of the filter elements 8 moves outwards, and the arc portion 802 gradually covers the position where the extension pipe 7 and the connecting pipe 6 are connected. Only the side surface of the arc portion 802 close to the pump body 1 is provided with a second mesh hole 804. Thus, the water flow entering the corresponding extension pipe 7 from the connecting pipe 6 is reduced. And because water always continuously enters the connecting pipe 6, the solid impurities filtered and retained at the end of the filter element 8 are pushed and moved towards the fixed shell 12 until the abutting block 15 contacts the outer wall of the sealing plate 14 when the arc portion 802 just completely covers the connection position between the extension pipe 7 and the connecting pipe 6. When the arc portion 802 continues to move outwards and pushes the sealing plate 14 outwards, the water flow entering the connecting pipe 6 is blocked by the arc portion 802 and reduced. Thus, the solid impurities retained at the end of the disc portion 801 are pushed into the fixed shell 12, and the leakage groove 121 is exposed between the sealing plate 14 and the disc portion 801 after the sealing plate 14 is pushed outwards, so that the solid impurities flow out from the leakage groove 121. Thus, through the periodic and horizontal reciprocating movement of the two filter elements 8 at intervals, the solid impurities are discharged during the continuous pumping process, so as to improve the effectiveness of the long-term pumping operation and extend the service life of the equipment.

[0034] Embodiment 2: Embodiment 2 includes all the structures and methods of Embodiment 1. Refer to Figures 1-10 , a single-stage split centrifugal pump for conveying mine water. On the basis of Embodiment 1, a horizontally placed fixed rod 16 is fixed at the central position of the partition plate 5 facing the front end portion 301. Guide vanes 17 are fixed at both the top and bottom of the fixed rod 16. One end of the guide vane 17 close to the partition plate 5 is inclined away from the fixed rod 16. The guide vane 17 is arranged in an arc structure that arches outwards. Guide shells 18 are fixed on both inner walls of the front end portion 301. A guide cavity is formed between the guide shell 18 and the inner wall of the front end portion 301. Both ends of the guide cavity are open. The part of the guide shell 18 facing the guide vane 17 is inclined, and the end of the guide shell 18 close to the partition plate 5 is inclined towards the guide vane 17. The bottom inner wall of the guide shell 18 is inclined downwards away from the partition plate 5. Through the inclined arc structure of the guide vane 17 and the gaps left between both sides of the guide vane 17 and the front end portion 301, solid impurities are guided towards both sides of the front end portion 301 and bounce back after hitting the partition plate 5. Part of the solid impurities are introduced into the guide cavity through the guide shell 18, so as to disperse the solid impurities and avoid blockage at the position of the filter element 8 due to a large amount of accumulation, which affects the continuous pumping effect of mine water.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A single-stage split centrifugal pump for conveying mine water, comprising a pump body (1), to which an inlet pipe (3) and an outlet pipe (4) are connected, characterized in that: The water inlet pipe (3) is provided with a front end portion (301) and a rear end portion (302), the rear end portion (302) being located between the pump body (1) and the front end portion (301), a partition plate (5) being fixed to the inner wall of the water inlet pipe (3) at a position between the front end portion (301) and the rear end portion (302), both sides of the rear end portion (302) being connected with extension pipes (7), a connecting pipe (6) being connected between the extension pipe (7) and the front end portion (301), a filter element (8) being provided at a position close to the rear end portion (302) in the extension pipe (7), the filter element (8) being provided with a round The disc portion (801) and the arc portion (802) are respectively provided, wherein the disc portion (801) is fitted with the inner wall of the extension tube (7), the outer wall of the disc portion (801) is provided with a mesh hole (803), the arc portion (802) is fixed to a position of the disc portion (801) close to the rear end portion (302), the arc portions (802) of the two filter screen members (8) are buckled to form a cylindrical structure, the arc portion (802) is adapted to the connection position of the corresponding extension tube (7) and the connecting tube (6), the arc portion (802) is provided with a mesh hole (804) on the side facing the pump body (1), and the arc portion (80 The outer wall of the extension tube (2) is fitted with the inner wall of the extension tube (7), the end of the extension tube (7) away from the rear end (302) is open, the end of the extension tube (7) away from the rear end (302) is installed with a fixed shell (12), the inner wall of the fixed shell (12) is fixed with a spring (13), the spring (13) is installed with a sealing plate (14) facing the end of the extension tube (7), the outer wall of the sealing plate (14) is slidably sealed with the inner wall of the fixed shell (12), the bottom of the fixed shell (12) is provided with a leakage groove (121), and the middle position of the fixed shell (12) is rotatably connected with a horizontally placed A driving rod (9) is provided, one end of the driving rod (9) is drivingly connected to a second motor (10), a sliding hole is provided at a middle position of the sealing plate (14) for sliding contact with the outer wall of the driving rod (9), a threaded hole is provided at a middle position of the disc portion (801) for threaded connection with the outer wall of the driving rod (9), two retaining blocks (15) are fixed to the outer wall of the disc portion (801) away from the arc-shaped portion (802), and a horizontally extending sliding groove (701) is provided at a position of the inner wall of the extension tube (7) corresponding to the retaining block (15), and the sliding groove (701) is opened in the direction of the fixed shell (12).

2. A single-stage split centrifugal pump for conveying mine water according to claim 1, characterized in that: The top and bottom of the front end portion (301) are both provided with openings, and the two openings are respectively connected to two connecting pipes (6), and the two connecting pipes (6) are respectively located above and below the water inlet pipe (3).

3. A single-stage split centrifugal pump for conveying mine water according to claim 2, characterized in that: A horizontally placed fixing rod (16) is fixed at the center position of the partition (5) toward the front end portion (301), and guide vanes (17) are fixed to the top and bottom of the fixing rod (16). The end of the guide vane (17) close to the partition (5) is inclined in a direction away from the fixing rod (16), and the guide vane (17) is arranged in an outwardly arched arc structure.

4. A single-stage split centrifugal pump for conveying mine water according to claim 3, characterized in that: A flow guide shell (18) is fixed to both inner walls of the front end portion (301), and a flow guide cavity is formed between the flow guide shell (18) and the inner wall of the front end portion (301), with both ends of the flow guide cavity being open.

5. A single-stage split centrifugal pump for conveying mine water according to claim 4, characterized in that: The guide shell (18) is arranged to be inclined toward the guide vane (17), and the end of the guide shell (18) close to the partition (5) is inclined toward the direction close to the guide vane (17), and the bottom inner wall of the guide shell (18) is inclined downward toward the direction away from the partition (5).

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