Two-stage axially split centrifugal pump for conveying mine water

Abstract

The invention belongs to the technical field of pumps, in particular to a two-stage split centrifugal pump for conveying mine water, and provides the following scheme that the two-stage split centrifugal pump comprises a first shell and a second shell, the first shell and the second shell are connected through a bolt, and a shaft rod is rotationally connected between the inner walls of the two opposite sides of the first shell through a bearing; a plurality of primary impellers and secondary impellers are arranged on the two sides of the outer wall of the shaft rod correspondingly, a motor is connected to one side of the inner wall of the first shell through bolts, one end of the motor is fixedly connected with one end of the shaft rod, a water inlet pipe is arranged on one side of the outer wall of the first shell, and a water drainage pipe is arranged on one side of the outer wall of the second shell. The impact force of mine water to the position between the water inlet pipe and the pipeline is conveniently reduced, and the situation that due to the fact that the pumping force of the centrifugal pump is large, the conveying flow speed of the mine water is large, the joint between the centrifugal pump and the pipeline is loosened under the action of water flow impact, water flow leaks, and then conveying of the mine water is affected is prevented.

Description

Technical Field

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

[0002] During the coal mining process, groundwater comes into contact with coal seams and rock strata, and with the influence of human activities, a series of physical, chemical and biochemical reactions occur. As a result, the water quality has significant characteristics of the coal industry: the suspended matter content of mine water containing suspended matter is much higher than that of surface water, and the sensory properties are poor; the suspended matter contained has a small particle size, light specific gravity, slow sedimentation rate, and poor coagulation effect; mine water also contains organic pollutants such as waste engine oil and emulsified oil. When transporting mine water, it is often necessary to use a two-stage split centrifugal pump to transport and treat the mine water.

[0003] After searching, the Chinese patent application with application publication number CN212928205U discloses a high-efficiency and energy-saving multi-stage horizontal split centrifugal pump, including a pump body, one side outer wall of the pump body is connected to a first support box by bolts, and the top and bottom central outer walls of the first support box are connected to a feed pipe by bolts, the middle outer wall of one side of the first support box is connected to a rotating motor by bolts, and the output shaft of the rotating motor is connected to a horizontally arranged first rotating shaft by bolts, and the circumferential middle outer wall of the first rotating shaft is connected to three equidistantly arranged first rotating disks by bolts. The high-efficiency and energy-saving multi-stage horizontal split centrifugal pump proposed in this patent is provided with a rotating motor, and the rotating motor drives the first rotating disk to rotate. At the same time, spiral blades are provided on the first rotating disk, and the material can be pumped by three groups of spiral blades. The setting of multi-stage spiral blades can effectively enhance the power of the material, thereby achieving the effect of effectively extracting the material.

[0004] When transporting mine water, the pipeline is usually connected to a centrifugal pump, and the mine water is extracted and transported by the centrifugal pump. However, during the extraction process, the flow rate of the mine water is large due to the large suction force of the centrifugal pump. At this time, the connection between the centrifugal pump and the pipeline will loosen under the impact of the water flow, causing the water to leak, thereby affecting the transportation of the mine water. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A two-stage split-center centrifugal pump for conveying mine water comprises a first shell and a second shell, and the first shell and the second shell are connected by bolts, a shaft is rotatably connected between the inner walls on both sides of the opposite sides of the first shell through bearings, and a plurality of primary impellers and secondary impellers are respectively arranged on both sides of the outer wall of the shaft, a motor is connected to one side of the inner wall of the first shell by bolts, and one end of the motor is fixedly connected to one end of the shaft, a water inlet pipe is arranged on one side of the outer wall of the first shell, a drain pipe is arranged on one side of the outer wall of the second shell, legs are connected to both sides of the bottom of the first shell by bolts, an inner pipe is slidably connected to the inner wall of the water inlet pipe, and a slow-flow mechanism is arranged inside the inner pipe.

[0006] Preferably, a limiting frame is welded on one side of the inner wall of the water inlet pipe, and the limiting frame is semi-annular in shape. A first spring is connected between one side of the limiting frame and the inner pipe by bolts, and a gap is left between the limiting frame and the inner pipe.

[0007] Preferably, the flow-delaying mechanism is composed of a rotating component, a pushing component and a flow-delaying component, and the rotating component, the pushing component and the flow-delaying component are matched with each other.

[0008] Preferably, the rotating assembly consists of a bracket, a rotating rod and a plurality of slow-flow blades, and the bracket is welded to one side of the inner wall of the inner tube, a rotating hole is opened through one side of the bracket, and a rotating connection is formed between the rotating hole and the rotating rod through a bearing, and the plurality of slow-flow blades are fixed on the outer wall of the rotating rod at equal distances, and the plurality of slow-flow blades are distributed in a spiral shape on the outer wall of the rotating rod.

[0009] Preferably, the pushing assembly consists of a first top block, a second top block and a support plate, and one side of the support plate is fixedly connected to the second top block, one side of the first top block is welded to the rotating rod, and multiple lifting ends are provided on the opposite sides of the first top block and the second top block, and the first top block and the second top block are matched with each other, and sliding grooves are provided on the inner walls of both sides of the inner tube, and sliders are slidably connected to the inner walls of the two sliding grooves, and a support rod is connected between the slider and the support plate by bolts.

[0010] Preferably, the slow flow assembly consists of a sealing tank, a piston plate and a plurality of slow flow plates, and a fixed shaft is arranged between the outer wall of the sealing tank and the inner wall of the inner tube, the piston plate is slidably connected to the inner wall of the sealing tank, a second spring is bolted between one side of the piston plate and the inner wall of one side of the sealing tank, a push rod is bolted between one side of the support plate and the piston plate, a plurality of exhaust ports are opened on one side of the outer wall of the sealing tank, the slow flow plate is fixedly connected to the inner wall of the exhaust port, a chamber is opened on one side of the slow flow plate, and the slow flow plate is made of a flexible material.

[0011] Preferably, a sealing groove is provided on one side of the water inlet pipe, and a sealing mechanism is provided between the sealing groove and one side of the inner wall of the water inlet pipe, and the sealing mechanism cooperates with the slow flow mechanism.

[0012] Preferably, the sealing mechanism is composed of a buffer pad and a sealing pad, and both the buffer pad and the sealing pad are made of hollow elastic material, and a conduit is arranged between the buffer pad and the sealing pad.

[0013] The beneficial effects of the present invention are: The present invention provides a slow-flow mechanism, and when transporting mine water, the water inlet pipe and the drainage pipe are connected to the pipeline respectively. After the connection is completed, the centrifugal pump is started, and the centrifugal pump will extract the mine water. During this period, when the mine water is transported to the connection between the water inlet pipe and the pipeline, the mine water will contact the slow-flow mechanism. At this time, the buffer blades will drive the rotating rod to rotate under the impact of the mine water. Since the buffer blades are spirally distributed on the rotating rod, the impacted water flow will flow in a spiral under the action of the buffer blades, so that the mine water with a faster flow rate can be effectively buffered through the cooperation between the multiple buffer blades. When the rotating rod is rotating, the first top block will rotate synchronously with the rotation of the rotating rod. At this time, the cooperation between the first top block and the second top block makes When the first top block rotates, it pushes the second top block to slide to one side, and the support plate pushes the push rod to slide to one side under the action of the slide groove and the slider. At this time, the push rod pushes the piston plate to slide inside the sealed tank, and the air pressure inside the sealed tank increases with the sliding of the piston plate. At this time, the flexible slow-flow plate swells under the action of the air pressure, and the hardness of the swollen slow-flow plate increases, so that the impact force of the mine water can be further blocked by the swollen slow-flow plate, so as to reduce the impact force of the mine water on the water inlet pipe and the pipeline, and prevent the connection between the centrifugal pump and the pipeline from loosening due to the large flow rate of the mine water transported by the centrifugal pump due to the large suction force of the centrifugal pump, thereby causing the water flow to leak, thereby affecting the transportation of the mine water; The present invention provides a slow-flow mechanism and a sealing mechanism. When the pipeline and the water inlet pipe are connected, one end of the pipeline will be sleeved on the outer wall of the inner pipe. When the impact force of mine water transportation is buffered by the slow-flow mechanism, when the flow rate of the mine water is faster, the inner pipe will slide to one side under the impact of the mine water. At this time, the inner pipe will squeeze the buffer pad, and the gas inside the buffer pad will be transported to the inside of the sealing pad through the conduit after being squeezed. The air pressure inside the sealing pad will increase due to the input of the gas. At this time, the sealing pad will be fixed under the action of the air pressure, and the bulging sealing pad will be tightly attached to the pipeline, so that the connection between the pipeline and the water inlet pipe can be sealed by the bulging of the sealing pad, so as to improve the transportation effect of mine water and prevent the pipeline and the water inlet pipe from loosening due to the impact of the water flow, thereby causing the mine water to penetrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a schematic structural diagram of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 2 A schematic diagram of the centrifugal pump opening structure of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 3 A schematic diagram of the partial structure of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 4 This is a schematic diagram of the water inlet pipe structure of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of a water inlet pipe of a two-stage split-center centrifugal pump for conveying mine water proposed by the present invention; Figure 6 This is a schematic diagram of the inner pipe structure of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a slow-flow mechanism of a two-stage split centrifugal pump for conveying mine water proposed by the present invention; Figure 8 The present invention is a schematic diagram of the sealing mechanism structure of a two-stage split centrifugal pump for conveying mine water.

[0015] In the attached drawings: 1. first shell; 2. second shell; 3. drain pipe; 4. support leg; 5. water inlet pipe; 6. shaft; 7. motor; 8. primary impeller; 9. secondary impeller; 10. inner tube; 11. slow flow mechanism; 12. slide groove; 13. sealing groove; 14. sealing mechanism; 15. limit frame; 16. first spring; 17. buffer pad; 18. rotating rod; 19. bracket; 20. slow flow blade; 21. first top block; 22. second top block; 23. support plate; 24. support rod; 25. slider; 26. sealing tank; 27. piston plate; 28. second spring; 29. ​​push rod; 30. exhaust port; 31. slow flow plate; 32. conduit; 33. sealing pad. DETAILED DESCRIPTION

[0016] Example 1, reference Figure 1-Figure 7A two-stage split centrifugal pump for conveying mine water comprises a first shell 1 and a second shell 2, and the first shell 1 and the second shell 2 are connected by bolts, a shaft 6 is rotatably connected between the inner walls of the first shell 1 on both sides through bearings, and a plurality of primary impellers 8 and secondary impellers 9 are respectively arranged on both sides of the outer wall of the shaft 6, a motor 7 is connected to one side of the inner wall of the first shell 1 by bolts, and one end of the motor 7 is fixedly connected to one end of the shaft 6, a water inlet pipe 5 is arranged on one side of the outer wall of the first shell 1, and a drain pipe 3 is arranged on one side of the outer wall of the second shell 2, legs 4 are connected to both sides of the bottom of the first shell 1 by bolts, an inner pipe 10 is slidably connected to the inner wall of the water inlet pipe 5, and a slow flow mechanism 11 is arranged inside the inner pipe 10, so as to reduce the impact of mine water on the water inlet pipe 5 and the pipeline, and prevent the connection between the centrifugal pump and the pipeline from loosening under the impact of water flow due to the large flow rate of mine water conveyed by the large suction force of the centrifugal pump, thereby causing water flow leakage, thereby affecting the conveying of mine water.

[0017] On the basis of the above, a limiting frame 15 is welded to one side of the inner wall of the water inlet pipe 5, and the limiting frame 15 is semi-annular in shape. A first spring 16 is connected between one side of the limiting frame 15 and the inner tube 10 by bolts, and a gap is left between the limiting frame 15 and the inner tube 10.

[0018] On the basis of the above, the slow flow mechanism 11 is composed of a rotating component, a pushing component and a slow flow component, and the rotating component, the pushing component and the slow flow component are matched with each other.

[0019] On the basis of the above, the rotating assembly is composed of a bracket 19, a rotating rod 18 and a plurality of slow-flow blades 20, and the bracket 19 is welded to one side of the inner wall of the inner tube 10, and a rotating hole is opened through one side of the bracket 19, and a rotating connection is formed between the rotating hole and the rotating rod 18 through a bearing, and a plurality of slow-flow blades 20 are fixed on the outer wall of the rotating rod 18 at equal distances, and the plurality of slow-flow blades 20 are distributed in a spiral shape on the outer wall of the rotating rod 18. The impacting water flow will flow in a spiral shape under the action of the buffer blades 20, so that the cooperation between the plurality of buffer blades 20 can effectively buffer the mine water with a faster flow rate.

[0020] On the basis of the above, the pushing assembly is composed of a first top block 21, a second top block 22 and a support plate 23, and one side of the support plate 23 is fixedly connected to the second top block 22, one side of the first top block 21 is welded to the rotating rod 18, and the first top block 21 and the second top block 22 are provided with multiple jacking ends on the opposite sides, and the first top block 21 and the second top block 22 are matched with each other, and the inner walls on both sides of the inner tube 10 are provided with sliding grooves 12, and the inner walls of the two sliding grooves 12 are slidably connected with sliders 25, and the slider 25 and the support plate 23 are connected with a support rod 24 by bolts.

[0021] On the basis of the above, the slow flow assembly is composed of a sealing tank 26, a piston plate 27 and a plurality of slow flow plates 31, and a fixed shaft is arranged between the outer wall of the sealing tank 26 and the inner wall of the inner tube 10, the piston plate 27 is slidably connected to the inner wall of the sealing tank 26, a second spring 28 is bolted to one side of the piston plate 27 and the inner wall of one side of the sealing tank 26, a push rod 29 is bolted to one side of the support plate 23 and the piston plate 27, a plurality of exhaust ports 30 are provided on one side of the outer wall of the sealing tank 26, a slow flow plate 31 is fixedly connected to the inner wall of the exhaust port 30, a chamber is provided on one side of the slow flow plate 31, the slow flow plate 31 is made of a flexible material, and is connected to the first top block 21 and the second top block by a second spring 28. The cooperation between the blocks 22 enables the first top block 21 to push the second top block 22 to slide to one side when rotating, and the support plate 23 will push the push rod 29 to slide to one side under the action of the slide groove 12 and the slider 25. At this time, the push rod 29 will push the piston plate 27 to slide inside the sealing tank 26, and the air pressure inside the sealing tank 26 will increase with the sliding of the piston plate 27. At this time, the flexible slow flow plate 31 will swell under the action of the air pressure, and the hardness of the swollen slow flow plate 31 will increase, so that the impact force of the mine water can be further blocked by the swollen slow flow plate 31, so as to reduce the impact force of the mine water on the water inlet pipe 5 and the pipeline.

[0022] Example 2, reference Figure 1-Figure 8 A two-stage split centrifugal pump for conveying mine water. Compared with Example 1, on the basis of Example 1, a sealing groove 13 is opened on one side of the water inlet pipe 5, and a sealing mechanism 14 is provided between the sealing groove 13 and one side of the inner wall of the water inlet pipe 5, and the sealing mechanism 14 is matched with the slow flow mechanism 11.

[0023] On the basis of the above, the sealing mechanism 14 is composed of a buffer pad 17 and a sealing pad 33, and the buffer pad 17 and the sealing pad 33 are both made of hollow elastic material. A conduit 32 is arranged between the buffer pad 17 and the sealing pad 33. The gas inside the buffer pad 17 will be transported to the inside of the sealing pad 33 through the conduit 32 after being squeezed. The air pressure inside the sealing pad 33 will increase due to the input of gas. At this time, the sealing pad 33 will be fixed under the action of the air pressure, and the bulging sealing pad 33 will be tightly attached to the pipe, so that the connection between the pipe and the water inlet pipe 5 can be sealed through the bulging of the sealing pad 33, so as to improve the transportation effect of mine water and prevent the pipe and the water inlet pipe 5 from loosening due to the impact of the water flow, thereby causing the mine water to penetrate.

[0024] In summary, with the aid of the above technical solution of the present invention: when transporting mine water, the water inlet pipe 5 and the drainage pipe 3 are connected to the pipeline respectively. After the connection is completed, the centrifugal pump is started, and the centrifugal pump will extract the mine water. During this period, when the mine water is transported to the connection between the water inlet pipe 5 and the pipeline, the mine water will contact the slow flow mechanism 11. At this time, the buffer blades 20 will drive the rotating rod 18 to rotate under the impact of the mine water. Since the buffer blades 20 are spirally distributed on the rotating rod 18, the impacting water flow will flow in a spiral shape under the action of the buffer blades 20, so that the cooperation between multiple buffer blades 20 can effectively The mine water with a faster flow rate is buffered. When the rotating rod 18 is rotating, the first top block 21 will rotate synchronously with the rotation of the rotating rod 18. At this time, the first top block 21 pushes the second top block 22 to slide to one side through the cooperation between the first top block 21 and the second top block 22 during rotation, and the support plate 23 pushes the push rod 29 to slide to one side under the action of the slide groove 12 and the slider 25. At this time, the push rod 29 pushes the piston plate 27 to slide inside the sealing tank 26, and the air pressure inside the sealing tank 26 increases with the sliding of the piston plate 27. At this time, the flexible slow flow plate 31 will swell under the action of the air pressure, and the swell The hardness of the raised slow flow plate 31 will increase, so that the impact force of the mine water can be further blocked by the raised slow flow plate 31, so as to reduce the impact force of the mine water on the water inlet pipe 5 and the pipeline, and prevent the connection between the centrifugal pump and the pipeline from loosening due to the impact of the water flow due to the large flow rate of the mine water transport caused by the large suction force of the centrifugal pump, thereby causing the water flow to leak and further affect the transportation of the mine water. When the pipeline and the water inlet pipe 5 are connected, one end of the pipeline will be sleeved on the outer wall of the inner tube 10. When the impact force of the mine water transport is buffered by the slow flow mechanism 11, when the flow rate of the mine water is fast, The inner tube 10 will slide to one side under the impact of mine water. At this time, the inner tube 10 will squeeze the buffer pad 17, and the gas inside the buffer pad 17 will be transported to the inside of the sealing pad 33 through the conduit 32 after being squeezed. The air pressure inside the sealing pad 33 will increase due to the input of gas. At this time, the sealing pad 33 will be fixed under the action of air pressure, and the bulging sealing pad 33 will be tightly attached to the pipe, so that the connection between the pipe and the water inlet pipe 5 can be sealed through the bulging of the sealing pad 33, so as to improve the mine water transportation effect and prevent the pipe and the water inlet pipe 5 from loosening due to the impact of water flow, thereby causing the mine water to penetrate.

[0025] 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 two-stage split centrifugal pump for conveying mine water, comprising a first housing (1) and a second housing (2), wherein the first housing (1) and the second housing (2) are connected by bolts, a shaft (6) is rotatably connected between two opposite inner walls of the first housing (1) by bearings, and a plurality of primary impellers (8) and secondary impellers (9) are respectively arranged on two sides of an outer wall of the shaft (6), a motor (7) is connected to one side of the inner wall of the first housing (1) by bolts, and one end of the motor (7) is fixedly connected to one end of the shaft (6), a water inlet pipe (5) is arranged on one side of the outer wall of the first housing (1), a drain pipe (3) is arranged on one side of the outer wall of the second housing (2), and legs (4) are connected to two sides of the bottom of the first housing (1) by bolts, characterized in that: The inner wall of the water inlet pipe (5) is slidably connected to an inner pipe (10), and a slow-flow mechanism (11) is arranged inside the inner pipe (10). A sealing groove (13) is provided on one side of the water inlet pipe (5), and a sealing mechanism (14) is arranged between the sealing groove (13) and one side of the inner wall of the water inlet pipe (5). The sealing mechanism (14) and the slow-flow mechanism (11) are matched with each other. The sealing mechanism (14) is composed of a buffer pad (17) and a sealing pad (33), and both the buffer pad (17) and the sealing pad (33) are made of hollow elastic material. A conduit (32) is arranged between the buffer pad (17) and the sealing pad (33).

2. A two-stage split centrifugal pump for conveying mine water according to claim 1, characterized in that: A limiting frame (15) is welded to one side of the inner wall of the water inlet pipe (5), and the limiting frame (15) is in a semi-annular shape. A first spring (16) is connected between one side of the limiting frame (15) and the inner pipe (10) via bolts, and a gap is left between the limiting frame (15) and the inner pipe (10).

3. A two-stage split centrifugal pump for conveying mine water according to claim 1, characterized in that: The slow flow mechanism (11) is composed of a rotating component, a pushing component and a slow flow component, and the rotating component, the pushing component and the slow flow component are matched with each other.

4. A two-stage split centrifugal pump for conveying mine water according to claim 3, characterized in that: The rotating assembly is composed of a bracket (19), a rotating rod (18), and a plurality of slow-flow blades (20), and the bracket (19) is welded to one side of the inner wall of the inner tube (10), a rotating hole is penetrated through one side of the bracket (19), and a rotating connection is formed between the rotating hole and the rotating rod (18) via a bearing, and the plurality of slow-flow blades (20) are fixed on the outer wall of the rotating rod (18) at equal distances, and the plurality of slow-flow blades (20) are distributed in a spiral shape on the outer wall of the rotating rod (18).

5. A two-stage split centrifugal pump for conveying mine water according to claim 4, characterized in that: The pushing assembly is composed of a first top block (21), a second top block (22) and a support plate (23), one side of the support plate (23) is fixedly connected to the second top block (22), one side of the first top block (21) is welded to the rotating rod (18), a plurality of jacking ends are arranged on opposite sides of the first top block (21) and the second top block (22), the first top block (21) and the second top block (22) are matched, the inner walls of both sides of the inner tube (10) are provided with sliding grooves (12), the inner walls of the two sliding grooves (12) are slidably connected with sliders (25), and a support rod (24) is connected between the slider (25) and the support plate (23) by bolts.

6. A two-stage split centrifugal pump for conveying mine water according to claim 5, characterized in that: The slow flow assembly is composed of a sealing tank (26), a piston plate (27) and a plurality of slow flow plates (31), wherein a fixed shaft is arranged between the outer wall of the sealing tank (26) and the inner wall of the inner tube (10), the piston plate (27) is slidably connected to the inner wall of the sealing tank (26), a second spring (28) is bolted to one side of the piston plate (27) and the inner wall of one side of the sealing tank (26), a push rod (29) is bolted to one side of the support plate (23) and the piston plate (27), a plurality of exhaust ports (30) are provided on one side of the outer wall of the sealing tank (26), the slow flow plate (31) is fixedly connected to the inner wall of the exhaust port (30), a chamber is provided on one side of the slow flow plate (31), and the slow flow plate (31) is made of a flexible material.

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