Single-stage axially split centrifugal pump for conveying mine water

Abstract

The invention belongs to the technical field of centrifugal pumps, in particular to a single-stage axially split centrifugal pump for conveying mine water, and provides the following scheme that the single-stage axially split centrifugal pump comprises a pump body, a water inlet pipe and a water outlet pipe are connected to the pump body, the water inlet pipe is provided with a front end part and a rear end part, and the rear end part is located between the pump body and the front end part; a partition plate is fixed to the position, between the front end and the rear end, of the inner wall of the water inlet pipe, extension pipes are communicated with the two sides of the rear end, connecting pipes are communicated between the extension pipes and the front end, and filter screen pieces are arranged at the positions, close to the rear end, in the extension pipes. Solid impurities in mine water are retained through the filter screen piece, damage to an impeller in the pump body is avoided, meanwhile, water flow is dispersed to improve the filtering effect, some dispersable solid agglomerates are smashed through opposite flushing, and therefore the effectiveness of long-time use of the centrifugal pump is effectively improved, and the service life of equipment is prolonged.

Description

Technical Field

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

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

[0003] Referring to the Chinese patent with the patent publication number CN115853819A, a horizontal double-suction centrifugal pump supported by a water-guided bearing is disclosed. The throat position of the pump cover of the centrifugal pump is provided with a bearing cavity to install the bearing group. The non-driving end uses a combination of a water-guided bearing and a thrust bearing, and the driving end uses a water-guided bearing. The surfaces of the water-guided bearing and the thrust bearing are attached with polymer materials. Both the driving end and the non-driving end adopt a structure in which high-pressure water is drawn from the pump cover water pressure chamber for cooling and lubrication; the non-driving end has no shaft seal and adopts a static sealing method, and the driving end uses a mechanical seal to seal the shaft.

[0004] However, when the above patent and the conventional single-stage split centrifugal pump in the prior art are used for pumping mine water, it is inevitable that the mine water will contain solid impurities, which can easily enter the centrifugal pump and cause damage to the impeller. Summary of the invention

[0005] Based on the technical problem of the background technology, the present invention proposes a single-stage split centrifugal pump for conveying mine water.

[0006] The present invention proposes a single-stage split centrifugal pump for conveying mine water, comprising a pump body, to which is connected an inlet pipe and an outlet pipe, the inlet pipe being provided with a front end and a rear end, the rear end being located between the pump body and the front end, a partition being fixed on an inner wall of the inlet pipe at a position between the front end and the rear end, extension pipes being connected on both sides of the rear end, a connecting pipe being connected between the extension pipe and the front end, and a filter being provided in the extension pipe near the rear end.

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

[0008] Preferably, the filter element is provided with a disc portion and an arc portion, the disc portion is fitted with the inner wall of the extension tube, the outer wall of the disc portion is provided with a mesh hole 1, 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 elements are buckled into a cylindrical structure, the arc portion is adapted to the connection position of the corresponding extension tube and the connecting tube, the arc portion is provided with a mesh hole 2 at the side position facing the pump body, and the outer wall of the arc portion is fitted with the inner wall of the extension tube.

[0009] Preferably, the end of the extension tube away from the rear end is opened, and a fixed shell is installed on the end of the extension tube away from the rear end. A spring is fixed on the inner wall of the fixed shell, and a sealing plate is installed on the end of the extension tube toward the spring. The outer wall of the sealing plate is slidably sealed with the inner wall of the fixed shell, and a leakage groove is opened 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 transmission-connected to motor 2, a sliding hole that is in sliding contact with the outer wall of the driving rod is opened in the middle position of the sealing plate, and a threaded hole that is threadedly connected to the outer wall of the driving rod is opened in the middle position of the disc part.

[0011] Preferably, two stoppers are fixed to the outer wall of the disc portion away from the arc-shaped portion, and a horizontally extending slide groove is provided at a position of the inner wall of the extension tube corresponding to the stoppers, and the slide groove is opened toward the direction of the fixed shell.

[0012] Preferably, a horizontally placed fixing rod is fixed at the center position of the front end of the partition, and guide vanes are fixed at the top and bottom of the fixing rod. The end of the guide vane close to the partition is inclined away from the fixing rod, and the guide vane is arranged to be an arc-shaped structure that arches outward.

[0013] Preferably, guide shells are fixed to both side inner walls of the front end portion, a guide cavity is formed between the guide shell and the inner wall of the front end portion, and both ends of the guide cavity are open.

[0014] Preferably, the guide shell is inclined toward the guide vane, and the end of the guide shell close to the partition is inclined toward the guide vane, and the bottom inner wall of the guide shell is inclined downward toward the direction away from the partition.

[0015] The beneficial effects of the present invention are: In the present invention, solid impurities in mine water are retained by the filter element to avoid damage to the impeller in the pump body. At the same time, by arranging the connecting pipe and the extension pipe, the water flow entering the front end is dispersed and flows out and then enters the rear end from both sides, so as to improve the filtering effect by dispersing the water flow and crush some dispersible solid agglomerates by hedging, thereby effectively improving the effectiveness of the long-term use of the centrifugal pump and extending the service life of the equipment.

[0016] In the present invention, the two filter screens are moved horizontally and reciprocatingly at intervals at intervals, so that solid impurities are effectively discharged during the continuous pumping process, thereby improving the effectiveness of long-term pumping operations and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 2This is a 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; Figure 3 This is a schematic diagram of a top cross-sectional structure of a water inlet pipe of a single-stage split-center centrifugal pump for conveying mine water proposed by the present invention; Figure 4 This is a schematic diagram of the side cross-sectional structure of a water inlet pipe of a single-stage split-center centrifugal pump for conveying mine water proposed by the present invention; Figure 5 This is a schematic cross-sectional structural diagram of the position of the extension pipe of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 6 This is a schematic diagram of the extension pipe structure of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 7 This is a schematic diagram of the distribution structure of the driving rod and filter element of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 8 This is a schematic diagram of the structure of a filter element of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Fig. 9 This is a schematic diagram of the front end structure of a single-stage split centrifugal pump for conveying mine water proposed by the present invention; Fig.10 The present invention is a schematic diagram of the guide vane and guide shell structure of a single-stage split centrifugal pump for conveying mine water.

[0018] In the figure: 1 pump body, 2 motor 1, 3 water inlet pipe, 301 front end, 302 rear end, 4 water outlet pipe, 5 baffle, 6 connecting pipe, 7 extension pipe, 701 slide, 8 filter element, 801 disc part, 802 arc part, 803 mesh 1, 804 mesh 2, 9 driving rod, 10 motor 2, 11 connecting sleeve, 12 fixed shell, 121 leakage groove, 13 spring, 14 sealing plate, 15 block, 16 fixed rod, 17 guide vane, 18 guide shell, 19 mounting frame. DETAILED DESCRIPTION

[0019] Example 1: Reference Figure 1-Figure 8A single-stage split centrifugal pump for conveying mine water comprises a pump body 1, the end of the rotating shaft in the pump body 1 is drivingly connected to a motor 2, a mounting 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 is provided with 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 to the inner wall of the water inlet pipe 3 at a position between the front end 301 and the rear end 302, the partition 5 is sealed with the inner wall of the water inlet pipe 3, both sides of the rear end 302 are connected with an extension pipe 7, a connecting pipe 6 is connected between the extension pipe 7 and the front end 301, a filter element 8 is provided in the extension pipe 7 near the rear end 302, and when in use, the rear end 302 is connected to the pump The impeller chamber in the body 1 is connected for pumping operation, and the rear end 302 is connected with the front end 301 through the extension pipe 7 and the connecting pipe 6. After being connected through the 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 into the pump body 1, and 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 flow entering the front end 301 is dispersed and flows out, and then enters the rear end 302 from both sides, so as to disperse the water flow to improve the filtering effect and crush some dispersible solid agglomerates through hedging, thereby effectively improving the effectiveness of the long-term use of the centrifugal pump and extending the service life of the equipment.

[0020] In the present invention, reference is made to Figure 1-Figure 8 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, so that 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 to reduce the impact of solid impurities and further improve the filtering and retention effect of the filter element 8.

[0021] In the present invention, reference is made to Figure 1-Figure 8 The filter element 8 is provided with a disc portion 801 and an arc portion 802. The disc portion 801 is fitted with the inner wall of the extension tube 7 and the rear end portion 302. The outer wall of the disc portion 801 is provided with a mesh hole 803. The arc portion 802 is fixed to the position of the disc portion 801 close to the rear end portion 302. The arc portions 802 of the two filter elements 8 are buckled into a cylindrical structure. The two arc portions 802 are arranged in an upper and lower distribution, and the arc portions 802 are connected to the corresponding extension tube 7 and the connecting tube 6. The length of the arc portion 802 is greater than the diameter of the connecting pipe 6, and a mesh second 804 is provided on the side of the arc portion 802 facing the pump body 1. The outer wall of the arc portion 802 fits with the inner walls of the extension pipe 7 and the rear end portion 302. The water flow entering the extension pipe 7 from the connecting pipe 6 passes through the mesh first 803 into the cylinder cavity formed by the two filter elements 8, and then passes through the mesh second 804 into the rear end portion 302 and flows into the pump body 1, thereby improving the filtering effectiveness of the diversion.

[0022] In the present invention, reference is made to Figure 1-Figure 8 The end of the extension tube 7 away from the rear end 302 is open, and a fixed shell 12 is installed at the end of the extension tube 7 away from the rear end 302. A seal is set between the fixed shell 12 and the extension tube 7. A spring 13 is fixed to the inner wall of the fixed shell 12. A sealing plate 14 is installed toward the end of the extension tube 7 by the spring 13. The outer wall of the sealing plate 14 is slidably sealed with the inner wall of the fixed shell 12. The sealing plate 14 fits with the end of the extension tube 7. A leakage groove 121 is provided 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 transmission-connected with a motor 2 10. The shell of the motor 2 10 is fixed to the outer wall of the fixed shell 12. The output shaft of the motor 2 10 is connected to the driving rod 9 through a coupling. A sliding contact with the outer wall of the driving rod 9 is provided in the middle position of the sealing plate 14. A threaded hole is provided in the middle of the disc portion 801 and is threadedly connected to the outer wall of the driving rod 9. A connecting sleeve 11 is provided between the two driving rods 9. The driving rod 9 and the connecting sleeve 11 are rotatably connected. Two retaining blocks 15 are fixed to the outer wall of the disc portion 801 away from the arc-shaped portion 802. A horizontally extending slide groove 701 is provided at a position corresponding to the retaining block 15 on the inner wall of the extension tube 7. The retaining block 15 is in sliding contact with the inner wall of the slide groove 701. The slide groove 701 is opened in the direction of the fixed shell 12. The driving rod 9 can be rotated by the motor 10 so that the filter element 8 can be horizontally moved in the corresponding extension tube 7. Under normal conditions, the two filter elements 8 are both in a position close to the rear end portion 302 and are buckled to form a cylindrical structure for filtering operation. The sealing plate 14 is tightly fitted and sealed with the end of the extension tube 7 under the action of the spring 13. When used for a long time, the filter element 8 is periodically moved outward horizontally. When one of the filter elements 8 moves outward, the arc portion 802 gradually covers the position where the extension pipe 7 and the connecting pipe 6 are connected. The arc portion 802 is provided with a mesh hole 804 only on the side close to the pump body 1, thereby reducing the water flow from the connecting pipe 6 into the corresponding extension pipe 7. Because the connecting pipe 6 always has water flowing into it, the solid impurities filtered out of the end of the filter element 8 are pushed and moved toward the fixed shell 12 until the arc portion 802 just covers the connecting position of the extension pipe 7 and the connecting pipe 6 completely, and the stop block 15 is in contact with the sealing plate 1. 4, the arc-shaped portion 802 continues to move outward and pushes the sealing plate 14 outward. At this time, the water flow entering the connecting pipe 6 is blocked by the arc-shaped portion 802 and reduced, thereby pushing the solid impurities retained at the end of the disc portion 801 into the fixed shell 12, and the sealing plate 14 is pushed outward to expose the leakage groove 121 between the sealing plate 14 and the disc portion 801, so that the solid impurities flow out of the leakage groove 121; thereby, the two filter elements 8 are horizontally reciprocated at periodic intervals, and the solid impurities are discharged during the continuous pumping process, so as to improve the effectiveness of long-term pumping operations and extend the service life of the equipment.

[0023] Embodiment 2: Embodiment 2 includes all structures and methods of Embodiment 1, with reference to Figure 1-Figure 10 A single-stage split centrifugal pump for conveying mine water, based on Example 1, a horizontally placed fixed rod 16 is fixed to the center position of the partition 5 toward the front end 301, and a guide vane 17 is fixed to the top and bottom of the fixed rod 16, and the end of the guide vane 17 close to the partition 5 is inclined in a direction away from the fixed rod 16, and the guide vane 17 is arranged in an arc structure arched outward, and a guide shell 18 is fixed to the inner wall of both sides of the front end 301, and a guide cavity is formed between the guide shell 18 and the inner wall of the front end 301, and the two ends of the guide cavity are open, and the guide shell 18 faces the guide vane 17. The guide shell 18 is partially inclined, and the end of the guide shell 18 close to the partition 5 is inclined toward the guide vane 17, and the bottom inner wall of the guide shell 18 is inclined downward in the direction away from the partition 5. Through the inclined arc structure of the guide vane 17 and the gap between the two sides of the guide vane 17 and the front end 301, the solid impurities are guided toward the two sides of the front end 301 and hit the partition 5 and rebound. 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 large-scale accumulation to cause blockage of the filter element 8 and affect the continuous pumping effect of mine water.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by 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 an 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 disc portion (801) and an arc portion (802). The cylindrical portion (802) is provided with a mesh hole (803), 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) at a side position facing the pump body (1), and the outer wall of the arc portion (802) is fitted with the inner wall of the extension tube (7).

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 any one of claims 1 to 2, characterized in that: The end of the extension tube (7) away from the rear end (302) is open, and a fixed shell (12) is installed at the end of the extension tube (7) away from the rear end (302). A spring (13) is fixed to the inner wall of the fixed shell (12), and a sealing plate (14) is installed at the end of the spring (13) facing the extension tube (7). The outer wall of the sealing plate (14) is slidably sealed with the inner wall of the fixed shell (12), and a leakage groove (121) is opened at the bottom of the fixed shell (12).

4. A single-stage split centrifugal pump for conveying mine water according to claim 3, characterized in that: 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), a sliding hole that is in sliding contact with the outer wall of the driving rod (9) is formed in the middle position of the sealing plate (14), and a threaded hole that is threadedly connected to the outer wall of the driving rod (9) is formed in the middle position of the disc portion (801).

5. A single-stage split centrifugal pump for conveying mine water according to claim 4, characterized in that: Two stoppers (15) are fixed to the outer wall of the disc portion (801) away from the arc-shaped portion (802), and a horizontally extending slide groove (701) is provided at a position on the inner wall of the extension tube (7) corresponding to the stoppers (15), and the slide groove (701) is opened in the direction of the fixed shell (12).

6. A single-stage split case 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.

7. A single-stage split centrifugal pump for conveying mine water according to claim 6, 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.

8. A single-stage split centrifugal pump for conveying mine water according to claim 7, 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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