Mining multi-stage centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a mining multi-stage centrifugal pump which comprises a pump body, a sealing access cover is fixedly installed on the end face of the pump body through bolts, a driving shaft used for driving an impeller installed in the pump body to rotate is arranged on the sealing access cover, a water inlet pipe is fixed to one side of the surface of the pump body, and a water outlet pipe is fixed to the other side of the surface of the pump body. A water inlet pipe is fixed to the other side of the surface of the pump body, a water outlet pipe is fixed to the other side of the surface of the pump body, flange plates are fixed to the water inlet pipe and the water outlet pipe, a forward and reverse rotation motor is installed on the water inlet pipe through a support, a fluted disc is fixed to the output end of the forward and reverse rotation motor, and an inner fixed pipe is arranged in the water inlet pipe. According to the mining multi-stage centrifugal pump, the water inlet pipe is connected with the external water pipe, water flow can be conveyed into the inner fixed pipe, and water is filtered through the inner fixed pipe and then discharged into the pump body, so that the water is filtered before entering the pump body, impurities in the water are prevented from blocking the pump body, and the service life of the pump body is prolonged. Therefore, the use efficiency of the mining multi-stage centrifugal pump can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a multi-stage centrifugal pump for mines. Background Technique

[0002] A centrifugal pump works by using the rotation of an impeller to cause centrifugal motion of water. A multi-stage centrifugal pump for mines is a centrifugal pump used in specific industrial scenarios (such as mines), which is composed of multiple impellers connected in series to achieve a higher lift.

[0003] During the use of a multi-stage centrifugal pump for mines, due to the special circumstances of mine development, the water quality in mines is usually turbid, and the turbid water contains a large amount of solid impurities. If the water is directly discharged into the centrifugal pump, it is easy to cause blockage of the impeller of the centrifugal pump, reducing the service life of the centrifugal pump. Moreover, before the existing multi-stage centrifugal pump for mines conveys water to the pump body, it does not have the function of filtering water, so that the impurities in the water are easily blocked in the pump body, and it is inconvenient to clean the impurities, thereby reducing the use efficiency of the multi-stage centrifugal pump for mines. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a multi-stage centrifugal pump for mines, which solves the problem that it is inconvenient to filter water first and then convey the water to the centrifugal pump when the multi-stage centrifugal pump for mines is in use.

[0006] (II) Technical Solutions

[0007] To achieve the purpose of facilitating the prior filtration of water and then conveying the water to the centrifugal pump when the above multi-stage centrifugal pump for mines is in use, the utility model provides the following technical solutions: A multi-stage centrifugal pump for mines includes a pump body. A sealing maintenance cover is fixedly installed on the end face of the pump body through bolts. A driving shaft for driving the impeller installed inside the pump body to rotate is arranged on the sealing maintenance cover. One side of the surface of the pump body is fixedly provided with a water inlet pipe, and the other side of the surface of the pump body is fixedly provided with a water outlet pipe. Flange plates are fixed on the water inlet pipe and the water outlet pipe. A forward and reverse motor is installed on the water inlet pipe through a bracket. A gear disk is fixed at the output end of the forward and reverse motor. An inner fixed pipe is arranged inside the water inlet pipe.

[0008] An outer rotation groove is formed between the water inlet pipe and the flange plate, and an inner rotation groove is formed between the inner fixed pipe and the flange plate. An outer rotation ring rotates inside the outer rotation groove, and an inner rotation ring rotates inside the inner rotation groove. A rack is fixed on the outer surface of the outer rotation ring. A right-angle bracket is fixed between the water inlet pipe and the flange plate. A water inlet cavity is formed by the gap between the water inlet pipe and the inner fixed pipe. A filtering cavity is formed inside the inner fixed pipe, and filter holes are formed inside the filtering cavity. A support rotation groove is formed on the inner wall of the water inlet cavity, and a support rotation ring rotates inside the support rotation groove. An outer spiral blade is arranged inside the water inlet cavity. A diamond-shaped bracket is fixed between the water inlet pipe and the inner fixed pipe. An inner rotating shaft is arranged inside the inner fixed pipe, and an inner spiral blade is fixed on the surface of the inner rotating shaft.

[0009] Preferably, one end of the outer side of the outer spiral blade is fixedly connected to the outer rotation ring, one end of the inner side of the outer spiral blade is fixedly connected to the support rotation ring, and the outer spiral blade is in contact with the inner surface of the water inlet pipe and the outer surface of the inner fixed pipe.

[0010] Preferably, one end of the inner side of the inner rotating shaft is rotatably connected to the inner fixed pipe, one end of the outer side of the inner spiral blade is fixedly connected to the inner rotation ring, the inner rotation ring is fixedly connected to the outer spiral blade, and the inner spiral blade is in contact with the inner surface of the inner fixed pipe.

[0011] Preferably, the water inlet pipe and the pump body are fixedly connected by bolts. The water inlet pipe and the inner fixed pipe are fixedly connected to each other through a diamond-shaped bracket. The water inlet pipe and the flange plate are fixedly connected to each other through a right-angle bracket.

[0012] Preferably, the filtering cavity is communicated with the water inlet cavity through the filter holes, and the water inlet cavity is communicated with the pump body.

[0013] Preferably, the water inlet pipe is rotationally connected to the outer spiral blade through the outer rotation groove and the outer rotation ring. The inner fixed pipe is rotationally connected to the inner spiral blade through the inner rotation groove and the inner rotation ring.

[0014] Preferably, the gear disk meshes with the rack. The gear disk is located between two right-angle brackets, and the rack is located inside the right-angle brackets.

[0015] Preferably, the drive shaft penetrates through the sealing maintenance cover and is rotationally connected to it. One end of the inner side of the drive shaft extends into the pump body and is fixedly connected to a multi-stage impeller group arranged inside the pump body.

[0016] Compared with the prior art, the present utility model provides a multi-stage centrifugal pump for mining, which has the following beneficial effects:

[0017] 1. For this multi-stage centrifugal pump for mines, when the inner spiral blade rotates, it can convey the water inside the filter cavity inward and disperse it, enabling the filter holes to filter the dispersed water. The filtered water enters the inside of the water inlet cavity through the filter holes and slides down to accumulate at the bottom of the water inlet cavity, while the filtered impurities remain inside the filter cavity. When the outer spiral blade rotates, it can push the water accumulated at the bottom of the water inlet cavity inward and convey it into the pump body. Therefore, the water can be filtered before entering the pump body, avoiding the blockage of the pump body by impurities in the water, and thus improving the efficiency of the multi-stage centrifugal pump during use.

[0018] 2. For this multi-stage centrifugal pump for mines, when the inner spiral blade rotates forward, it can convey the water inside the filter cavity inward and disperse it, enabling the dispersed water to quickly pass through the filter holes, thereby improving the water filtration efficiency. When the water supply to the inside of the filter cavity stops and the inner spiral blade rotates in reverse, the inner spiral blade can scrape and clean the inner wall of the filter cavity, and can convey the impurities accumulated inside the filter cavity outward and discharge them, thus achieving the purpose of self-cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front schematic view of the structure of the present utility model;

[0020] Figure 2 is a back schematic view of the structure of the present utility model;

[0021] Figure 3 is a partial cross-sectional view of the water inlet pipe of the structure of the present utility model;

[0022] Figure 4 For the present utility model Figure 3 is a partially enlarged schematic view of the structure at A in the present utility model;

[0023] Figure 5 For the present utility model Figure 3 is a partially enlarged schematic view of the structure at B in the present utility model.

[0024] Wherein: 1. Pump body; 2. Sealed maintenance cover; 3. Driving shaft; 4. Water inlet pipe; 5. Water outlet pipe; 6. Flange; 7. Forward and reverse motor; 8. Gear disc; 9. Inner fixed pipe; 10. Outer rotating groove; 11. Inner rotating groove; 12. Outer rotating ring; 13. Inner rotating ring; 14. Rack; 15. Right-angle bracket; 16. Water inlet cavity; 17. Filter cavity; 18. Filter hole; 19. Support rotating groove; 20. Support rotating ring; 21. Outer spiral blade; 22. Rhombus bracket; 23. Inner rotating shaft; 24. Inner spiral blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-5 , the present invention provides a mine multi-stage centrifugal pump, including a pump body 1. A sealing and maintenance cover 2 is fixedly installed on the end face of the pump body 1 through bolts. A drive shaft 3 for driving the impeller installed inside the pump body 1 to rotate is provided on the sealing and maintenance cover 2. One side of the surface of the pump body 1 is fixed with a water inlet pipe 4, and the other side of the surface of the pump body 1 is fixed with a water outlet pipe 5. Flange discs 6 are fixed on the water inlet pipe 4 and the water outlet pipe 5. A forward and reverse motor 7 is installed on the water inlet pipe 4 through a bracket. A gear disc 8 is fixed to the output end of the forward and reverse motor 7. An inner fixed pipe 9 is arranged inside the water inlet pipe 4;

[0027] An outer rotation groove 10 is formed between the water inlet pipe 4 and the flange disc 6, and an inner rotation groove 11 is formed between the inner fixed pipe 9 and the flange disc 6. An outer rotation ring 12 rotates inside the outer rotation groove 10, and an inner rotation ring 13 rotates inside the inner rotation groove 11. A rack 14 is fixed to the outer surface of the outer rotation ring 12. A right-angle bracket 15 is fixed between the water inlet pipe 4 and the flange disc 6. The gap between the water inlet pipe 4 and the inner fixed pipe 9 forms a water inlet cavity 16. A filter cavity 17 is opened inside the inner fixed pipe 9, and filter holes 18 are opened inside the filter cavity 17. A support rotation groove 19 is opened on the inner wall of the water inlet cavity 16, and a support rotation ring 20 rotates inside the support rotation groove 19. An outer spiral blade 21 is arranged inside the water inlet cavity 16. A diamond-shaped bracket 22 is fixed between the water inlet pipe 4 and the inner fixed pipe 9. An inner rotating shaft 23 is arranged inside the inner fixed pipe 9, and an inner spiral blade 24 is fixed to the surface of the inner rotating shaft 23. By connecting the drive shaft 3 to an external power source, the drive shaft 3 can drive the multi-stage impeller group arranged inside the pump body 1 to rotate. By connecting the flange disc 6 on one side of the water inlet pipe 4 to an external water pipe, water can be conveyed into the water inlet pipe 4, and the water can be filtered first through the inner fixed pipe 9 to prevent impurities in the water from blocking the pump body 1.

[0028] Furthermore, one outer end of the outer spiral blade 21 is fixedly connected to the outer rotation ring 12, and one inner end of the outer spiral blade 21 is fixedly connected to the support rotation ring 20. The outer spiral blade 21 is in contact with the inner surface of the water inlet pipe 4 and the outer surface of the inner fixed pipe 9. When the outer spiral blade 21 rotates, it can push the water accumulated at the bottom of the water inlet cavity 16 inward and convey it into the pump body 1.

[0029] Further, the inner end of the inner rotating shaft 23 is rotatably connected to the inner fixed tube 9, the outer end of the inner spiral piece 24 is fixedly connected to the inner rotating ring 13, the inner rotating ring 13 is fixedly connected to the outer spiral piece 21, the inner spiral piece 24 is in contact with the inner surface of the inner fixed tube 9, the outer rotating ring 12 is fixedly connected to the outer spiral piece 21, the outer spiral piece 21 is fixedly connected to the inner rotating ring 13, and the inner rotating ring 13 is fixedly connected to the inner spiral piece 24, facilitating the simultaneous rotation of the outer rotating ring 12, the outer spiral piece 21, the inner rotating ring 13, and the inner spiral piece 24. When the forward and reverse motor 7 rotates forward, the inner spiral piece 24 can also rotate forward, capable of inwardly conveying and dispersing the water inside the filtration chamber 17, enabling the dispersed water to quickly pass through the filter holes 18, thereby improving the filtration efficiency of the water. When the water supply to the filtration chamber 17 stops and the inner spiral piece 24 rotates reversely, the inner spiral piece 24 can scrape and clean the inner wall of the filtration chamber 17, and can convey and discharge the impurities accumulated inside the filtration chamber 17 outward, thereby achieving the purpose of self-cleaning.

[0030] Further, the water inlet pipe 4 is fixedly connected to the pump body 1 by bolts, the water inlet pipe 4 and the inner fixed tube 9 are fixedly connected to each other through the diamond-shaped bracket 22, and the water inlet pipe 4 and the flange 6 are fixedly connected to each other through the right-angle bracket 15. The diamond-shaped bracket 22 can fix the inner end of the water inlet pipe 4 and the inner fixed tube 9 to each other, and the diamond-shaped bracket 22 is diamond-shaped, capable of reducing the resistance to water. The right-angle bracket 15 can fix the water inlet pipe 4 and the flange 6 to each other.

[0031] Further, the filtration chamber 17 is communicated with the water inlet chamber 16 through the filter holes 18, and the water inlet chamber 16 is communicated with the pump body 1. After the water enters the filtration chamber 17, the water inside the filtration chamber 17 can be filtered through the filter holes 18, and the filtered water enters the water inlet chamber 16, and the water inlet chamber 16 conveys the filtered water to the pump body 1.

[0032] Further, the water inlet pipe 4 is rotatably connected to the outer spiral piece 21 through the outer rotation groove 10 and the outer rotating ring 12, and the inner fixed tube 9 is rotatably connected to the inner spiral piece 24 through the inner rotation groove 11 and the inner rotating ring 13. The outer rotating ring 12 and the inner rotating ring 13 can support the rotation of the outer end of the outer spiral piece 21, the support rotating ring 20 can support the rotation of the inner end of the outer spiral piece 21, the inner rotating ring 13 can support the rotation of the outer end of the inner spiral piece 24, and the inner rotating shaft 23 is rotatably connected to the inner end of the inner fixed tube 9. Therefore, the inner rotating shaft 23 can support the rotation of the inner end of the inner spiral piece 24.

[0033] Further, the gear disk 8 meshes with the rack 14. The gear disk 8 is located between two right-angle brackets 15, and the rack 14 is located inside the right-angle brackets 15, facilitating the forward and reverse motor 7 to drive the outer rotating ring 12 to rotate through the meshing of the gear disk 8 and the rack 14, and avoiding interference between the rack 14 and the right-angle brackets 15 during rotation.

[0034] Further, the drive shaft 3 penetrates through the sealed inspection cover 2 and is rotatably connected thereto. The inner end of the drive shaft 3 extends into the interior of the pump body 1 and is fixedly connected to a multi-stage impeller group provided inside the pump body 1. By connecting the drive shaft 3 to an external power source, the drive shaft 3 can be driven to rotate, and thus the drive shaft 3 can drive the multi-stage impeller group provided inside the pump body 1 to rotate.

[0035] During use, by connecting the drive shaft 3 to an external power source, the drive shaft 3 can be driven to rotate the multi-stage impeller group provided inside the pump body 1. By connecting the flange 6 on one side of the water inlet pipe 4 to an external water pipe, water can be sent into the inner fixed pipe 9, and the water can enter the interior of the filter chamber 17. At the same time, the forward and reverse motor 7 is started to drive the gear disk 8 to rotate, and the gear disk 8 can drive the outer rotating ring 12 to rotate through meshing with the rack 14. The outer rotating ring 12 can drive the outer spiral blade 21 to rotate, and the inner end of the outer spiral blade 21 can be supported and rotated through the support rotating ring 20. When the outer spiral blade 21 rotates, it can also drive the inner rotating ring 13 to rotate, and the inner rotating ring 13 can drive the inner spiral blade 24 to rotate, and the inner spiral blade 24 can be supported and rotated through the inner rotating shaft 23. Thus, the outer spiral blade 21 can rotate inside the water inlet chamber 16, and the inner spiral blade 24 can rotate inside the filter chamber 17. When the inner spiral blade 24 rotates, the water inside the filter chamber 17 can be conveyed inward and spread out, so that the filter holes 18 can filter the spread-out water. The filtered water enters the interior of the water inlet chamber 16 through the filter holes 18 and slides downward and accumulates at the bottom of the water inlet chamber 16, preventing the filtered water from re-entering the interior of the water inlet chamber 16 through the filter holes 18. The filtered impurities remain inside the filter chamber 17. When the outer spiral blade 21 rotates, the water accumulated at the bottom of the water inlet chamber 16 can be pushed inward and conveyed into the pump body 1, and after being centrifuged by the multi-stage impeller group inside the pump body 1, it is discharged through the water outlet pipe 5. Thus, before the water enters the pump body 1, the water can be filtered to avoid impurities in the water from clogging the pump body 1, thereby improving the efficiency of using the multi-stage centrifugal pump.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage centrifugal pump for mining, comprising a pump body (1), characterized in that: The end face of the pump body (1) is fixedly installed with a sealed maintenance cover (2) through bolts. A drive shaft (3) for driving the impeller installed inside the pump body (1) to rotate is arranged on the sealed maintenance cover (2). One side of the surface of the pump body (1) is fixedly provided with a water inlet pipe (4), and the other side of the surface of the pump body (1) is fixedly provided with a water outlet pipe (5). Flange plates (6) are fixed on the water inlet pipe (4) and the water outlet pipe (5). A forward and reverse motor (7) is installed on the water inlet pipe (4) through a bracket. A gear disk (8) is fixed at the output end of the forward and reverse motor (7). An inner fixed pipe (9) is arranged inside the water inlet pipe (4). An outer rotation groove (10) is formed between the water inlet pipe (4) and the flange plate (6), and an inner rotation groove (11) is formed between the inner fixed pipe (9) and the flange plate (6). An outer rotation ring (12) rotates inside the outer rotation groove (10), and an inner rotation ring (13) rotates inside the inner rotation groove (11). A rack (14) is fixed on the outer surface of the outer rotation ring (12). A right-angle bracket (15) is fixed between the water inlet pipe (4) and the flange plate (6). The gap between the water inlet pipe (4) and the inner fixed pipe (9) forms a water inlet cavity (16). A filter cavity (17) is formed inside the inner fixed pipe (9). Filter holes (18) are formed inside the filter cavity (17). A support rotation groove (19) is formed on the inner wall of the water inlet cavity (16), and a support rotation ring (20) rotates inside the support rotation groove (19). An outer spiral blade (21) is arranged inside the water inlet cavity (16). A diamond-shaped bracket (22) is fixed between the water inlet pipe (4) and the inner fixed pipe (9). An inner rotating shaft (23) is arranged inside the inner fixed pipe (9), and an inner spiral blade (24) is fixed on the surface of the inner rotating shaft (23).

2. The multistage centrifugal pump for mine use according to claim 1, wherein: One outer end of the outer spiral blade (21) is fixedly connected with the outer rotation ring (12), and one inner end of the outer spiral blade (21) is fixedly connected with the support rotation ring (20). The outer spiral blade (21) is in contact with the inner surface of the water inlet pipe (4) and the outer surface of the inner fixed pipe (9).

3. A multi-stage centrifugal pump for mine use according to claim 1, wherein: One inner end of the inner rotating shaft (23) is rotatably connected with the inner fixed pipe (9). One outer end of the inner spiral blade (24) is fixedly connected with the inner rotation ring (13). The inner rotation ring (13) is fixedly connected with the outer spiral blade (21). The inner spiral blade (24) is in contact with the inner surface of the inner fixed pipe (9).

4. A multi-stage centrifugal pump for mine use according to claim 1, characterized in that: The water inlet pipe (4) is fixedly connected with the pump body (1) through bolts. The water inlet pipe (4) and the inner fixed pipe (9) are fixedly connected with each other through a diamond-shaped bracket (22). The water inlet pipe (4) and the flange plate (6) are fixedly connected with each other through a right-angle bracket (15).

5. A multi-stage centrifugal pump for mining use according to claim 1, wherein: The filter cavity (17) is communicated with the water inlet cavity (16) through the filter holes (18), and the water inlet cavity (16) is communicated with the pump body (1).

6. The multistage centrifugal pump for mines according to claim 1, characterized in that: The water inlet pipe (4) is rotatably connected with the outer spiral blade (21) through the outer rotation groove (10) and the outer rotation ring (12). The inner fixed pipe (9) is rotatably connected with the inner spiral blade (24) through the inner rotation groove (11) and the inner rotation ring (13).

7. A multi-stage centrifugal pump for mining use according to claim 1, characterized in that: The toothed disc (8) meshes with the rack (14). The toothed disc (8) is located between two sets of right-angle brackets (15), and the rack (14) is located inside the right-angle brackets (15).

8. A multi-stage centrifugal pump for mines according to claim 1, characterized in that: The drive shaft (3) penetrates through the sealed maintenance cover (2) and is rotatably connected thereto. One end of the inner side of the drive shaft (3) extends into the pump body (1) and is fixedly connected to a multi-stage impeller group provided inside the pump body (1).

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