Special tool for disassembling mechanical seal

Abstract

The utility model relates to a special tool for disassembling a mechanical seal, which comprises a pull ring, a clamping piece, a pull rod and a top plate, the pull ring is connected with the clamping piece, the clamping piece is connected with a mechanical seal shaft sleeve, one end of the pull rod is connected with the pull ring, the other end of the pull rod is connected with the top plate, and a hydraulic jack is arranged between the top plate and a pump rotating shaft and drives the top plate to move outwards. The pull rod and the pull ring move outwards together, so that the clamping piece and the mechanical sealing shaft sleeve are driven to move outwards together, the mechanical sealing shaft sleeve is detached from the pump rotating shaft, and therefore the situation that the mechanical sealing shaft sleeve is prone to being impacted and damaged due to the fact that the mechanical sealing shaft sleeve is detached through prying of a crowbar or knocking of a hand hammer is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seal disassembly, in particular to a special tool for mechanical seal disassembly. Background Art

[0002] The transmission shaft of the machine pump of the oil refining and chemical plant runs through the inside and outside of the equipment. There is a circumferential gap between the shaft and the equipment. The medium in the equipment will leak outward from the gap, so a shaft seal device is required for sealing. The shaft seal device usually adopts a mechanical seal type. After the machine pump has been running for a long time, the medium is not clean or the medium itself is easy to coke. Unclean substances or coking media enter between the shaft sleeve and the pump shaft, which will make the mechanical seal shaft sleeve and the pump shaft fit too tight. When the mechanical seal needs to be disassembled for maintenance, the mechanical seal shaft sleeve is easy to get stuck on the rotating shaft and is difficult to remove. Prying with a crowbar or knocking with a hammer to disassemble it is easy to cause the mechanical seal shaft sleeve to be damaged by impact. Utility Model Content

[0003] The purpose of the utility model is to design a special tool for disassembling a mechanical seal to solve the technical problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special tool for disassembling a mechanical seal, comprising a pull ring, a clamp, a pull rod and a top plate, the pull ring being connected to the clamp, the clamp being connected to the mechanical seal sleeve, one end of the pull rod being connected to the pull ring, the other end of the pull rod being connected to the top plate, and a hydraulic jack being provided between the top plate and the pump shaft.

[0005] Furthermore, the clamping member includes a first clamping ring and a second clamping ring, the inner diameters of the first clamping ring and the second clamping ring are both larger than the outer diameter of the mechanical seal sleeve, and the inner sides of the first clamping ring and the second clamping ring are both provided with protrusions, and the protrusions are gap-matched with the grooves on the outer wall of the mechanical seal sleeve.

[0006] Furthermore, a groove for inserting the first clamping ring and the second clamping ring is provided on the inner side of the pull ring.

[0007] Furthermore, the pull ring has four pull rods in a circumferential array.

[0008] Furthermore, the outer walls of the four pull rods are provided with external threads, the pull ring has a first threaded hole in a circumferential array, the top plate has a second threaded hole in a circumferential array, and the first threaded hole and the second threaded hole correspond to the pull rods one by one.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model drives the top plate to move outward through the hydraulic jack, and the pull rod and the pull ring move outward together, thereby driving the clamp and the mechanical seal sleeve to move outward together, thereby removing the mechanical seal sleeve from the pump shaft. Therefore, the utility model avoids the use of a crowbar to pry or a hammer to knock and disassemble, which may easily cause the mechanical seal sleeve to be damaged by impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the pull ring of the utility model;

[0012] Figure 3 It is a structural schematic diagram of the card of the utility model;

[0013] The names of the components marked in the figure are as follows: 1. Pull ring; 2. Clamp; 201. First clamp; 202. Second clamp; 3. Pull rod; 4. Top plate; 5. Hydraulic jack; 6. Protrusion; 7. Nut; 8. Gasket; 9. Mechanical seal sleeve; 10. Pump shaft. DETAILED DESCRIPTION

[0014] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0015] Example: Please refer to Figure 1-3A special tool for disassembling a mechanical seal comprises a pull ring 1, a clamp 2, a pull rod 3 and a top plate 4. The inner diameter of the pull ring 1 is larger than the outer diameter of the mechanical seal sleeve 9. The pull ring 1 is sleeved on the outer wall of the mechanical seal sleeve 9 and is in clearance with the pull ring 1 and the outer wall of the mechanical seal sleeve 9. The clamp 2 is connected to the mechanical seal sleeve 9. Specifically, the clamp 2 comprises a first clamp ring 201 and a second clamp ring 202. The first clamp ring 201 and the second clamp ring 202 adopt a semicircular structure with equal diameters, so as to facilitate the first clamp ring 201 and the second clamp ring 202 to be disassembled. 2 is quickly assembled with the mechanical seal sleeve 9, the inner diameters of the first snap ring 201 and the second snap ring 202 are both larger than the outer diameter of the mechanical seal sleeve 9, so that the first snap ring 201 and the second snap ring 202 can be sleeved on the outer wall of the mechanical seal sleeve 9, and the inner sides of the ends of the first snap ring 201 and the second snap ring 202 are both provided with a convex body 6, that is, the inner rings of the first snap ring 201 and the second snap ring 202 are both grooved, so that the ends thereof form a convex body 6, and the convex body 6 is gap-matched with the groove of the outer wall of the mechanical seal sleeve 9, that is, the convex body 6 is inserted into the groove; the pull ring 1 and the clamping ring The pull ring 1 is connected with the first clamping ring 201 and the second clamping ring 202. Specifically, the inner side of the pull ring 1 is provided with a groove for inserting the first clamping ring 201 and the second clamping ring 202, and the end faces of the first clamping ring 201 and the second clamping ring 202 are in contact with the end faces of the groove; the pull ring 1 is arrayed with four pull rods 3 in the circumferential direction, so that the mechanical seal sleeve 9 is evenly stressed, which is conducive to the rapid disassembly of the mechanical seal sleeve 9; one end of the pull rod 3 is connected to the pull ring 1, and the other end of the pull rod 3 is connected to the top plate 4. Specifically, the outer walls of the four pull rods 3 are all provided with external threads, and the pull ring 1 has a first thread in a circumferential array. Hole, there is a second threaded hole in a circular array on the top plate 4, the first threaded hole and the second threaded hole are corresponding to the pull rod 3 one by one, and the pull rod 3 is locked on the pull ring 1 and the top plate 4 by using a nut 7 and a gasket 8, wherein the gasket 8 is made of elastic material, so that the nut 7 is more firm and prevents the nut 7 from loosening during the disassembly of the mechanical seal sleeve 9; a hydraulic jack 5 is provided between the top plate 4 and the pump shaft 10, and the top plate 4 and the pump shaft 10 clamp the hydraulic jack 5, and the top plate 4 is pushed outward by the hydraulic jack 5, so that the top plate 4 moves outward.

[0016] The working principle of this embodiment is as follows: when in use, the pull ring 1 is sleeved on the outer wall of the mechanical seal sleeve 9 and moved to the left side of the groove, and the first snap ring 201 and the second snap ring 202 are sleeved on the outer wall of the mechanical seal sleeve 9, wherein the protrusions 6 on the first snap ring 201 and the second snap ring 202 are inserted into the groove of the mechanical seal sleeve 9, and the pull ring 1 is pulled axially so that the end face of the groove abuts against the end face of the first snap ring 201 and the second snap ring 202, and the pull ring 1 sleeves the first snap ring 201 and the second snap ring 202, so that the first snap ring 201 and the second snap ring 202 will not fall off the mechanical seal sleeve 9; the pull rod 3 is inserted into the second threaded hole and the first threaded hole in turn, and the nut 7 and the gasket are used. 8. Fix each tie rod 3 and the pull ring 1, and then insert the gasket 8 and the nut 7 in turn from the right end of the tie rod 3, insert the hydraulic jack 5 between the pump shaft 10 and the top plate 4, wherein the hydraulic jack 5 is placed in the middle of the top plate 4, and by tightening the nut 7 on the right side, make the top plate 4 parallel to the end face of the pull ring 1, start the hydraulic jack 5, and push the top plate 4 outward through the hydraulic jack 5, the tie rod 3 and the pull ring 1 move outward together, thereby driving the clamp 2 and the mechanical seal sleeve 9 to move outward together, so that the mechanical seal sleeve 9 is removed from the pump shaft 10. Therefore, the utility model avoids the use of a crowbar to pry or a hammer to knock and disassemble, which may easily cause the mechanical seal sleeve 9 to be damaged by impact.

[0017] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A special tool for disassembling a mechanical seal, characterized by: It comprises a pull ring (1), a clamp (2), a pull rod (3) and a top plate (4), wherein the pull ring (1) is connected to the clamp (2), the clamp (2) is connected to a mechanical seal sleeve (9), one end of the pull rod (3) is connected to the pull ring (1), the other end of the pull rod (3) is connected to the top plate (4), and a hydraulic jack (5) is provided between the top plate (4) and the pump shaft (10).

2. The special tool for disassembling a mechanical seal according to claim 1, characterized in that: The clamping member (2) comprises a first clamping ring (201) and a second clamping ring (202); the inner diameters of the first clamping ring (201) and the second clamping ring (202) are both larger than the outer diameter of the mechanical seal sleeve (9); a protrusion (6) is provided on the inner side of the first clamping ring (201) and the second clamping ring (202); the protrusion (6) is in clearance fit with the clamping groove of the outer wall of the mechanical seal sleeve (9).

3. The special tool for disassembling a mechanical seal according to claim 2, characterized in that: The inner side of the pull ring (1) is provided with grooves for inserting the first clamping ring (201) and the second clamping ring (202).

4. The special tool for disassembling a mechanical seal according to claim 1, characterized in that: The pull ring (1) has four pull rods (3) arranged in an array in the circumferential direction.

5. The special tool for disassembling a mechanical seal according to claim 4, characterized in that: The outer walls of the four pull rods (3) are all provided with external threads, the pull ring (1) has a first threaded hole in a circumferential array, the top plate (4) has a second threaded hole in a circumferential array, and the first threaded hole and the second threaded hole correspond one-to-one to the pull rods (3).

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