A sealing structure for a multi-stage pump used in mining

Abstract

The present invention discloses a sealing structure for a multi-stage pump for mining, which relates to the technical field of sealing structures of pumps, comprising an inner pipe and an outer pipe arranged outside the inner pipe, wherein an annular protrusion is provided on the inner wall of the inner pipe, a U-shaped rubber ring is provided between the annular protrusion and the inner pipe, and a plurality of guide columns are provided in a circumferential array at one end of the outer pipe, wherein the guide columns are arranged perpendicular to the outer pipe and pass through the outer pipe. The present invention rotates a moving rod, and the rotation of the moving rod drives the rotating tube 1 to rotate. The rotating tube 1 synchronously drives the rotating tube 2 to rotate through a driving rod. The rotation of the rotating tube 1 drives the trapezoidal block 1 to move, squeezes the trapezoidal block 2, and then drives the clamping block to clamp and fix the connecting pipe from the outside through the guide column and the spring 1; the rotation of the rotating tube 2 drives the trapezoidal block 3 to rotate, and then squeezes the trapezoidal block 4, and then squeezes the inclined edge of the U-shaped rubber ring through the guide column 1 and the spring 3 to perform sealing, thereby achieving better sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of pump body sealing, and in particular to a sealing structure for a multi-stage pump used in mining. Background Art

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

[0003] A multi-stage centrifugal pump for mining is disclosed in publication number CN115263763A. The impeller of the multi-stage centrifugal pump in this invention includes a movable vane and a fixed vane. The movable vane can move axially relative to the fixed vane, thereby changing the volume of the liquid inlet cavity between the movable vane and the fixed vane of the impeller. In conjunction with the balance plate, the axial movement of the centrifugal pump is improved. At the same time, when the impeller liquid inlet cavity is blocked, the distance between the movable vane and the fixed vane is increased to perform backwashing to clear the blockage, which is practical.

[0004] However, when the pump body is connected to the external connecting pipe, the sealing performance of the rubber ring will deteriorate after long-term use. Therefore, a sealing structure is provided to facilitate adjusting the tightness of the rubber ring and synchronously clamping the connecting pipe. Summary of the Invention

[0005] The purpose of the present invention is to provide a sealing structure for a mining multi-stage pump to solve the following technical problem: when the pump body is connected to the external connecting pipe, the sealing performance of the rubber ring will deteriorate after long-term use.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A sealing structure for a multi-stage mining pump comprises an inner pipe and an outer pipe disposed outside the inner pipe, an annular protrusion being disposed on the inner wall of the inner pipe, a U-shaped rubber ring being disposed between the annular protrusion and the inner pipe, a plurality of guide posts being disposed in a circumferential array at one end of the outer pipe, the guide posts being disposed perpendicular to and extending through the outer pipe, a clamping block being fixedly mounted on one end of the guide post, a second trapezoidal block being fixedly mounted on the other end of the guide post, and a first spring being sleeved on the guide post and located between the clamping block and the inner wall of the outer pipe;

[0008] Rotating tube 2 and rotating tube 1 are symmetrically installed at both ends of the outside of the outer pipe, and a fixing ring is provided on the adjacent side of rotating tube 2 and rotating tube 1, and a rotating ring is provided on the opposite side of rotating tube 2 and rotating tube 1. Rotating tube 2 and rotating tube 1 are connected by multiple driving rods, and multiple trapezoidal blocks 1 are installed at equal distances on the inner wall of rotating tube 1, and trapezoidal block 1 cooperates with trapezoidal block 2; a moving rod is vertically provided on rotating tube 1.

[0009] As a further solution of the present invention: the other end of the outer pipe is provided with a plurality of guide columns 1 in a circular array, the guide columns 1 are arranged perpendicular to the outer pipe, and one end of the guide column 1 passes through the outer pipe and is connected to the trapezoidal block 4, and the other end extends to the inner pipe and is connected to one side of the U-shaped rubber ring provided in the inner pipe, and a spring 3 is sleeved on the guide column 1 and located between the inner pipe and the outer pipe; a plurality of trapezoidal blocks 3 are installed at equal distances on the inner wall of the rotating tube 2, and the trapezoidal block 3 is adapted to the trapezoidal block 4.

[0010] As a further solution of the present invention: an arc-shaped slide groove is provided on the fixed ring on one side of the rotating tube, and limiting holes are provided at both ends of the arc-shaped slide groove. A sliding sleeve is slidably connected to the arc-shaped slide groove, and the end of the sliding sleeve away from the arc-shaped slide groove is fixedly connected to the inner wall of the rotating tube. The interior of the sliding sleeve is horizontally slidably connected to a moving rod, one end of the moving rod is inserted into the limiting hole, and the other end extends to the outside of the rotating tube, and a spring 2 is sleeved on the moving rod and located in the sliding sleeve.

[0011] As a further solution of the present invention: the interior of the annular protrusion is connected to the inner wall support mechanism through support plates arranged at equal distances.

[0012] As a further solution of the present invention: the inner wall support mechanism includes a hollow drain pipe, a plurality of air guide tubes are installed on the hollow drain pipe at equal distances, a push rod is slidably connected to the inside of the air guide tube, a push block is fixedly installed on the end of the push rod away from the air guide tube, the push block is slidably connected to the hollow drain pipe, both sides of the push block are rotatably connected to a rotating rod, the rotating rod is inclined, and a spring four is provided at the end of the rotating rod away from the push block, the spring four is connected to the rubber block through a connecting block, two pairs of rotating connecting rods are symmetrically installed on both sides of the rubber block, and the rotating connecting rods are rotatably connected to the hollow drain pipe.

[0013] As a further solution of the present invention: one end of the moving rod away from the limiting hole is sleeved with a limiting sleeve, and the limiting sleeve is threadedly connected to the rotating ring.

[0014] As a further solution of the present invention: a trapezoidal rubber ring is provided on the outer wall of the annular protrusion, and the trapezoidal rubber ring is symmetrically arranged with respect to the inclined side of the U-shaped rubber ring.

[0015] Beneficial effects of the present invention:

[0016] The present invention rotates the moving rod, and the rotation of the moving rod drives the rotating tube one to rotate. The rotating tube one drives the rotating tube two to rotate synchronously through the driving rod. The rotation of the rotating tube one drives the trapezoidal block one to move. During the rotation of the trapezoidal block one, it contacts the trapezoidal block two, squeezes the trapezoidal block two, and then drives the clamping block to clamp and fix the connecting tube from the outside through the guide column and the spring one; the rotation of the rotating tube two drives the trapezoidal block three to rotate, and then squeezes the trapezoidal block four, and then squeezes the inclined edge of the U-shaped rubber ring through the guide column one and the spring three to perform sealing, and the sealing effect is better; the arrangement of this structure is convenient for synchronous clamping and extrusion sealing, and can also be applied to slightly larger connecting tubes. In this case, it will only be clamped more precisely, but there will be no other effects. At the same time, the rubber clamping block can adjust the tightness of the U-shaped rubber ring to avoid the deterioration of its sealing after long-term use; installation and disassembly are very convenient and do not require bolt locking.

[0017] The inner wall support mechanism of the present invention drives the rubber block to contact the inner wall of the connecting pipe and cooperates with the clamping block to clamp from the inside and outside, which has a better clamping effect and will not cause deformation of the connecting pipe caused by single clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0020] Figure 2 It is a structural schematic diagram of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the rotary tube 1 of the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the sliding sleeve of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the rotary tube 2 of the present invention;

[0024] Figure 6 1 is a side view of the U-shaped rubber ring of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation structure of the trapezoidal rubber ring of the present invention;

[0026] Figure 8 It is a schematic diagram of the overall structure of the inner wall support mechanism of the present invention.

[0027] In the figure: 1. outer pipe; 2. rotating pipe 2; 3. rotating pipe 1; 4. fixing ring; 5. driving rod; 6. inner wall support mechanism; 7. inner pipe; 21. trapezoidal block 3; 22. trapezoidal block 4; 23. guide column 1; 24. spring 3; 31. moving rod; 32. sliding sleeve; 33. arc-shaped slide groove; 34. limiting hole; 35. trapezoidal block 1; 36. trapezoidal block 2; 37. clamping block; 38. spring 1; 39. guide column; 310. spring 2; 311. limiting sleeve; 61. hollow drain pipe; 62. air guide pipe; 63. push rod; 64. push block; 65. rotating rod; 66. spring 4; 67. rotating connecting rod; 68. rubber block; 71. annular protrusion; 72. support plate; 73. U-shaped rubber ring; 711. trapezoidal rubber ring DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1-7 As shown, the present invention is a sealing structure for a multi-stage pump for mining, comprising an inner pipe 7 and an outer pipe 1 arranged outside the inner pipe 7, an annular protrusion 71 being provided on the inner wall of the inner pipe 7, a U-shaped rubber ring 73 being provided between the annular protrusion 71 and the inner pipe 7, a plurality of guide posts 39 being provided in a circumferential array at one end of the outer pipe 1, the guide posts 39 being arranged perpendicular to the outer pipe 1 and passing through the outer pipe 1, a clamping block 37 being fixedly mounted on one end of the guide post 39, the clamping block 37 being a rubber structure, a trapezoidal block 2 36 being fixedly mounted on the other end of the guide post 39, a spring 1 38 being sleeved on the guide post 39 and located between the clamping block 37 and the inner wall of the outer pipe 1;

[0031] Rotating tube 2 2 and rotating tube 1 3 are symmetrically installed at both ends of the outside of the outer pipe 1. A fixing ring 4 is provided on the adjacent side of rotating tube 2 2 and rotating tube 1 3, and a rotating ring is provided on the opposite side of rotating tube 2 2 and rotating tube 1 3. Rotating tube 2 2 and rotating tube 1 3 are connected by multiple driving rods 5. Multiple trapezoidal blocks 1 35 are installed at equal distances on the inner wall of rotating tube 1 3. Trapezoidal block 1 35 cooperates with trapezoidal block 2 36; a moving rod 31 is vertically provided on rotating tube 1 3.

[0032] The other end of the outer pipe 1 is provided with a plurality of guide columns 23 in a circular array. The guide columns 23 are arranged perpendicular to the outer pipe 1, and one end of the guide column 23 passes through the outer pipe 1 and is connected to the trapezoidal block 4 22, and the other end extends to the inner pipe 7 and is connected to one side of the U-shaped rubber ring 73 provided in the inner pipe 7. A spring 3 24 is sleeved on the guide column 23 and located between the inner pipe 7 and the outer pipe 1; a plurality of trapezoidal blocks 3 21 are installed at equal distances on the inner wall of the rotating tube 2, and the trapezoidal block 3 21 is adapted to the trapezoidal block 4 22.

[0033] First, insert the connecting pipe into the inner pipe 7, and connect one end of the inner pipe 7 to the pump body, then rotate the moving rod 31. The rotation of the moving rod 31 will drive the rotating pipe 1 3 to rotate, and the rotating pipe 1 3 will synchronously drive the rotating pipe 2 2 to rotate through the driving rod 5. The rotation of the rotating pipe 1 3 will drive the trapezoidal block 1 35 to move. During the rotation of the trapezoidal block 1 35, it will contact with the trapezoidal block 2 36, squeezing the trapezoidal block 2 36, and then drive the clamping block 37 to clamp and fix the connecting pipe from the outside through the guide column 39 and the spring 1 38; the rotating pipe The rotation of the second block 2 will drive the rotation of the trapezoidal block 3 21, thereby squeezing the trapezoidal block 4 22, and then squeezing the inclined edge of the U-shaped rubber ring 73 through the guide column 1 23 and the spring 3 24 to achieve a better sealing effect. The setting of this structure is convenient for simultaneous clamping and squeezing sealing, and can also be used for slightly larger connecting pipes. In this case, the clamping will only be more precise, but there will be no other effects. At the same time, the rubber clamping block can adjust the tightness of the U-shaped rubber ring to avoid its sealing performance from deteriorating after long-term use.

[0034] The cam 33 is provided with a plurality of holes 34 on the two ends of the cam 33 so as to prevent the cam 33 from sliding out of the locking cam 32. The cam 33 is provided with a plurality of holes 34 on the two ends of the cam 33 so as to prevent the cam 33 from sliding out of the locking cam 32.

[0035] Pull the moving rod 31, then rotate the moving rod 31, thereby driving the rotating tube 3 to rotate, and the sliding sleeve 32 slides in the arc-shaped sliding groove 33. After sliding to the top, release the moving rod 31, and the moving rod 31 is inserted into the limiting hole 34, thereby limiting the rotating tube 3.

[0036] The end of the moving rod 31 away from the limiting hole 34 is sleeved with a limiting sleeve 311, and the limiting sleeve 311 is threadedly connected to the rotating ring. The setting of the limiting sleeve 311 is to prevent the moving rod 31 from moving back and forth under the action of horizontal force after positioning, which may cause it to become loose easily; the threaded connection between the limiting sleeve 311 and the rotating ring facilitates the fixing of the limiting sleeve 311.

[0037] A trapezoidal rubber ring 711 is provided on the outer wall of the annular protrusion 71. The trapezoidal rubber ring 711 and the inclined side of the U-shaped rubber ring 73 are symmetrically arranged. The mutual extrusion is to improve the sealing effect. When the pipe is inserted between the annular protrusion 71 and the inner pipe 7, the trapezoidal rubber ring 711 is squeezed first, and then the U-shaped rubber ring 73 is squeezed. Under the action of the U-shaped rubber ring 73 and the trapezoidal rubber ring 711, a layer-by-layer sealing connection is performed to prevent leakage.

[0038] Example 2

[0039] See also Figure 1-8 As shown, the interior of the annular protrusion 71 is connected to the inner wall support mechanism 6 via support plates 72 arranged at equal distances. The inner wall support mechanism 6 includes a hollow drain pipe 61, on which a plurality of air guide tubes 62 are installed at equal distances. A push rod 63 is slidably connected to the interior of the air guide tube 62. A push block 64 is fixedly installed at one end of the push rod 63 away from the air guide tube 62. The push block 64 is slidably connected to the hollow drain pipe 61. Both sides of the push block 64 are rotatably connected to a rotating rod 65. The rotating rod 65 is arranged at an angle, and a spring 66 is provided at the end of the rotating rod 65 away from the push block 64. The spring 66 is connected to a rubber block 68 via a connecting block. Two pairs of rotating connecting rods 67 are symmetrically installed on both sides of the rubber block 68. The rotating connecting rods 67 are rotatably connected to the hollow drain pipe 61.

[0040] When the connecting tube is inserted, the rubber block 68 is in a state of contraction, and then the air guide tube 62 is inflated and pressurized, pushing the push rod 63 to move, thereby driving the push block 64 to move. The push block 64 drives the rubber block 68 to contact the inner wall of the connecting tube through the setting of the rotating rod 65 and the rotating connecting rod 67, and cooperates with the clamping block 37 to clamp from the inside and outside, which has a better clamping effect and will not cause deformation of the connecting tube due to a single clamping.

[0041] The working principle of the present invention is as follows: first, the connecting pipe is inserted into the inner pipe 7, and one end of the inner pipe 7 is connected to the pump body, then the moving rod 31 is pulled and the moving rod 31 is rotated, thereby driving the rotating pipe 3 to rotate, and the sliding sleeve 32 slides in the arc-shaped slide groove 33. After sliding to the top, the moving rod 31 is released, and the moving rod 31 is inserted into the limiting hole 34, thereby limiting the rotating pipe 3, and at the same time, the limiting sleeve 311 is limited to prevent the moving rod 31 from reciprocating under the action of horizontal force after positioning, which is easy to loosen; the limiting sleeve 311 is threadedly connected to the rotating ring to facilitate fixing the limiting sleeve 3 11; The rotating tube 1 3 drives the rotating tube 2 2 to rotate synchronously through the driving rod 5. The rotation of the rotating tube 1 3 drives the trapezoidal block 1 35 to move. During the rotation of the trapezoidal block 1 35, it contacts the trapezoidal block 2 36, squeezes the trapezoidal block 2 36, and then drives the clamping block 37 to clamp and fix the connecting tube from the outside through the guide column 39 and the spring 1 38; at the same time, the air guide tube 62 is pressurized and pushed to move the push rod 63, thereby driving the push block 64 to move. The push block 64 drives the rubber block 68 to contact the inner wall of the connecting tube through the setting of the rotating rod 65 and the rotating connecting rod 67, clamping from the inside and outside, and achieving a better clamping effect;

[0042] At this time, the rotation of the rotating tube 2 will drive the rotation of the trapezoidal block 3 21, and then squeeze the trapezoidal block 4 22, and then squeeze the inclined edge of the rubber ring 73 through the guide column 1 23 and the spring 3 24 to achieve a better sealing effect; the setting of this structure is convenient for simultaneous clamping and extrusion sealing, and can also be used for slightly larger connecting pipes. At this time, it will only be clamped more precisely, but there will be no other impact.

[0043] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A sealing structure for a multi-stage mining pump, comprising an inner pipe (7) and an outer pipe (1) arranged outside the inner pipe (7), characterized in that: An annular protrusion (71) is provided on the inner wall of the inner pipe (7), and a U-shaped rubber ring (73) is provided between the annular protrusion (71) and the inner pipe (7). A plurality of guide posts (39) are provided in a circumferential array at one end of the outer pipe (1). The guide posts (39) are arranged perpendicular to the outer pipe (1) and pass through the outer pipe (1). A clamping block (37) is fixedly installed at one end of the guide post (39), and a trapezoidal block 2 (36) is fixedly installed at the other end of the guide post (39). A spring 1 (38) is sleeved on the guide post (39) and located between the clamping block (37) and the inner wall of the outer pipe (1). Rotating tube 2 (2) and rotating tube 1 (3) are symmetrically installed at both ends of the outer side of the outer pipe (1), and a fixing ring (4) is provided on the adjacent side of rotating tube 2 (2) and rotating tube 1 (3), and a rotating ring is provided on the opposite side of rotating tube 2 (2) and rotating tube 1 (3). Rotating tube 2 (2) and rotating tube 1 (3) are connected by multiple driving rods (5), and multiple trapezoidal blocks (35) are installed at equal distances on the inner wall of rotating tube 1 (3), and the trapezoidal block (35) cooperates with the trapezoidal block (36); a moving rod (31) is vertically provided on rotating tube 1 (3).

2. A sealing structure for a mining multi-stage pump according to claim 1, characterized in that: The other end of the outer pipe (1) is provided with a plurality of guide columns (23) in a circular array. The guide columns (23) are arranged perpendicular to the outer pipe (1), and one end of the guide column (23) passes through the outer pipe (1) and is connected to the trapezoidal block (22), and the other end extends to the inner pipe (7) and is connected to one side of the U-shaped rubber ring (73) provided in the inner pipe (7). A spring (24) is sleeved on the guide column (23) and located between the inner pipe (7) and the outer pipe (1); a plurality of trapezoidal blocks (21) are installed at equal distances on the inner wall of the rotating tube (2), and the trapezoidal block (21) is adapted to the trapezoidal block (22).

3. The sealing structure for a multi-stage mining pump according to claim 1, characterized in that: An arc-shaped slide groove (33) is provided on the fixed ring (4) on one side of the rotating tube (3), and limiting holes (34) are provided at both ends of the arc-shaped slide groove (33). A sliding sleeve (32) is slidably connected to the arc-shaped slide groove (33), and one end of the sliding sleeve (32) away from the arc-shaped slide groove (33) is fixedly connected to the inner wall of the rotating tube (3). The interior of the sliding sleeve (32) is horizontally slidably connected to a moving rod (31), one end of the moving rod (31) is inserted into the limiting hole (34), and the other end extends to the outside of the rotating tube (3), and a spring 2 (310) is sleeved on the moving rod (31) and located in the sliding sleeve (32).

4. A sealing structure for a multi-stage mining pump according to claim 1, characterized in that: The interior of the annular protrusion (71) is connected to the inner wall support mechanism (6) via support plates (72) arranged at equal distances.

5. A sealing structure for a multi-stage mining pump according to claim 4, characterized in that: The inner wall support mechanism (6) comprises a hollow drain pipe (61), a plurality of air guide pipes (62) are installed at equal distances on the hollow drain pipe (61), a push rod (63) is slidably connected inside the air guide pipe (62), a push block (64) is fixedly installed at one end of the push rod (63) away from the air guide pipe (62), the push block (64) is slidably connected to the hollow drain pipe (61), both sides of the push block (64) are rotatably connected to a rotating rod (65), the rotating rod (65) is tilted, and a spring four (66) is provided at one end of the rotating rod (65) away from the push block (64), the spring four (66) is connected to a rubber block (68) through a connecting block, two pairs of rotating connecting rods (67) are symmetrically installed on both sides of the rubber block (68), and the rotating connecting rod (67) is rotatably connected to the hollow drain pipe (61).

6. The sealing structure for a multi-stage mining pump according to claim 1, characterized in that: One end of the moving rod (31) away from the limiting hole (34) is sleeved with a limiting sleeve (311), and the limiting sleeve (311) is threadedly connected to the rotating ring.

7. The sealing structure for a multi-stage mining pump according to claim 1, characterized in that: A trapezoidal rubber ring (711) is provided on the outer wall of the annular protrusion (71), and the trapezoidal rubber ring (711) is symmetrically arranged with respect to the inclined side of the U-shaped rubber ring (73).

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