CN216098691U

CN216098691U - A extracting tool for dismantling centrifugal water pump mechanical seal fast

Info

Publication number: CN216098691U
Application number: CN202121276226.6U
Authority: CN
Inventors: 杨光; 叶胜利; 黄斌; 舒欣
Original assignee: China Tobacco Zhejiang Industrial Co Ltd
Current assignee: China Tobacco Zhejiang Industrial Co Ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-03-22
Anticipated expiration: 2031-06-08

Abstract

The utility model relates to a disassembling tool for quickly disassembling a mechanical seal of a centrifugal water pump; the pull claw lock comprises a plurality of pull claws, a locking piece and an annular disc, wherein each pull claw is independently and movably arranged on the annular disc and is vertical to the annular disc; each pulling claw can rotate relative to the annular disc to adjust the angle and/or can move along the axial direction of the annular disc to adjust the extending length; the locking piece is detachably connected to the pull claw and pushes against the wall surface of the annular disc to lock and position the pull claw on the annular disc.

Description

A extracting tool for dismantling centrifugal water pump mechanical seal fast

Technical Field

The utility model relates to the field of disassembling tools, in particular to a disassembling tool for quickly disassembling a mechanical seal of a centrifugal water pump.

Background

The existing refrigerating station of the power plant of the cigarette factory is provided with a plurality of inlet double-suction centrifugal refrigerating water pumps and cooling water pumps which are responsible for supplying water for a refrigerating system of the whole factory. As shown in fig. 1, the internal structure of the existing water pump includes a housing, a mechanical seal 6, a shaft sleeve 8, a bearing 7 and a shaft body, the water pump adopts a special mechanical seal 6 for an inlet, the mechanical seal 6 is directly fixed on the shaft and is close to the mechanical seal 6 chamber at the two sides of the water pump impeller. After the water pump is operated for a long time, the mechanical seal 6 may be worn and leak water, so the mechanical seal 6 of the water pump needs to be replaced regularly. There is not this special mechanical seal 6 extracting tool at present, because the mechanical seal 6 of water pump both sides all adorn in mechanical seal 6 indoor, this interior space is narrow and small, if do not open pump cover and have two problems when dismantling mechanical seal 6: firstly, the stress point is difficult to find and disassemble, which wastes time and labor; secondly, because the space in the sealed chamber is narrow and small, the pump shaft and the surrounding surface are easily damaged when the sealing device is detached by using a tool. Consequently when change mechanical seal 6 at every turn appears in order to avoid above problem, need hang up whole water pump housing, then adopt the mode of beating to dismantle mechanical seal 6, because the atress is uneven when adopting soft instruments such as bar copper to beat 6 surfaces of mechanical seal for mechanical seal 6's dismantlement is very difficult, wastes time and energy, and maintenance personal intensity of labour is big, is unfavorable for the quick restoration of equipment, influences the guarantee dynamics of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a simple, convenient, quick and stable-operation dismounting tool for quickly dismounting a mechanical seal of a centrifugal water pump, which can directly and quickly dismount the mechanical seal of the centrifugal water pump in a mechanical seal chamber under the condition of not dismounting a water pump cover shell, can completely protect the surface of a pump shaft from being damaged, and effectively ensures that the mechanical seal and the mechanical seal chamber are not damaged.

In order to achieve the above object, the main technical solution of the present invention is a disassembling tool for quickly disassembling a mechanical seal of a centrifugal water pump, wherein the disassembling tool comprises a plurality of pulling claws, a locking member and an annular disc, each pulling claw is independently and movably arranged on the annular disc, and the pulling claws are perpendicular to the annular disc; each pulling claw can rotate relative to the annular disc to adjust the angle and/or can move along the axial direction of the annular disc to adjust the extending length; the locking piece is detachably connected to the pull claw and pushes against the wall surface of the annular disc to lock and position the pull claw on the annular disc.

In some examples, the pull claw comprises a rod body part and a hook body part arranged at one end of the rod body part, the rod body part is at least provided with an adjusting section, the adjusting section is provided with an external thread, the locking piece comprises at least one locking nut, and the locking nut is arranged on the adjusting section and can clamp and position the annular disc in the adjusting section.

In some examples, the locking nut comprises a first locking nut and a second locking nut, the first locking nut and the second locking nut are sleeved on the adjusting section and are located on two side wall surfaces of the annular disc, and the pulling claw is locked and located on the annular disc by screwing the first locking nut and the second locking nut into the clamping position.

In some examples, the disassembling tool further comprises a locking hoop, the locking hoop is sleeved outside a ring body formed by the plurality of pulling claws in a surrounding mode, and the circle center of the locking hoop and the circle center of the annular disc are located on the same axis.

In some examples, the extracting tool includes three draw the claw, be equipped with three through-hole on the cyclic annular disc, the pitch arc distance between the adjacent through-hole equals, the aperture of through-hole slightly is greater than the body of rod portion diameter that draws the claw, the body of rod portion that draws the claw runs through in the through-hole.

In some examples, one side of the hook part is a hook opening, and the wall surface of the other side of the hook part is an arc-shaped wall surface with a guide extending into the arc-shaped wall surface.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

on the premise of not disassembling a water pump housing, the depth of a pull claw in a mechanical seal chamber is adjustable to the rear end of the mechanical seal and the mechanical seal is hooked, nuts at the front end and the rear end are locked, and after a hoop is locked, a pull horse is matched to hook an annular disc, so that the mechanical seal can be directly separated from a shaft, the disassembly time is greatly shortened, and the maintenance efficiency is greatly improved;

the utility model has simple structure and convenient operation, and reduces the labor intensity of maintenance personnel.

Drawings

Figure 1 is an internal structure of a water pump in the prior art,

figure 2 is a schematic structural diagram of an embodiment of the present invention,

in the figure: the locking device comprises an annular disc 1, a first locking nut 2, a pull claw 3, a rod body part 31, a hook body part 32, a locking hoop 4, a second locking nut 5, a mechanical seal 6, a bearing 7 and a shaft sleeve 8.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is to be understood that the terms "a" and "an" are to be interpreted as meaning that a number of one element may be one in one embodiment or multiple in another embodiment, and the terms "a" and "an" are not to be interpreted as limiting the number.

The first embodiment is as follows:

referring to figures 1 to 2 of the drawings accompanying the present specification, a removal tool for quickly removing a mechanical seal 6 of a centrifugal water pump according to a preferred embodiment of the present invention; the pull claw locking mechanism comprises a plurality of pull claws 3, a locking piece and an annular disc 1, wherein each pull claw 3 is independently and movably arranged on the annular disc 1, and the pull claws 3 are vertical to the annular disc 1; each pulling claw 3 can rotate relative to the annular disc 1 to adjust the angle and/or can move along the axial direction of the annular disc 1 to adjust the extending length; the locking piece is detachably connected to the pull claw 3, and the pull claw 3 is locked and positioned on the annular disc 1 by abutting against the wall surface of the annular disc 1; the technical scheme has the advantages that on the premise that the water pump housing is not required to be disassembled, the adjustable pull claw 3 is arranged in the mechanical seal 6 chamber of the water pump to reach the rear end of the mechanical seal 6 and hook the mechanical seal 6, the pull claw 3 is fixed on the annular disc 1 through the locking piece, the mechanical seal 6 can be directly separated from a shaft by hooking the annular disc 1 through the matching of the pull claw after the hoop 4 is locked, the disassembling time is greatly shortened, and the maintenance efficiency is greatly improved; the technical scheme provided by the embodiment has the advantages of simple structure, low cost and convenience in operation, and can greatly reduce the labor intensity of maintenance personnel.

Specifically, the present embodiment is further described by mainly taking three pulling claws 3 as an example, the pulling claws 3 include a rod body portion 31 and a hook body portion 32 disposed at one end of the rod body portion 31, in the present embodiment, the hook body portion 32 is fixedly connected with the rod body portion 31, and the fixing manner can be by welding, integral molding, and the like; of course, in other embodiments, detachable connections, such as snap connections, etc., may be used; the annular disc 1 is provided with three through holes, arc distances between the adjacent through holes are equal, an included angle formed by the adjacent through holes and the circle center of the annular disc 1 is 120 degrees, the aperture of each through hole is slightly larger than the diameter of the rod body part 31 of each pull claw 3, so that the three adjustable pull claws 3 can rotate in the annular disc 1 and can be adjusted at a certain angle, wherein one side of the hook body part 32 is a hook opening, the wall surface of the other side of the hook body part is an arc-shaped wall surface with a guide extending-in function, when a disassembling tool needs to extend into a shaft opening of a water pump, the hook openings of the three pull claws 3 face inwards, the wall surface of the other side extends into the shaft opening along the pipe wall, and the arc-shaped wall surface is designed to have a certain guide function and can extend into the water pump smoothly without manual adjustment and plugging; when the mechanical seal 6 is stretched, the hook opening is rotated from the inner side to the outer side by rotating the pull claw 3, and the pipe wall of the mechanical seal 6 is hooked; the rod body part 31 of the pull claw 3 penetrates through the through hole.

In this embodiment, the rod body 31 is at least provided with an adjusting section, the annular disc 1 is located in the adjusting section, the locking member includes a first locking nut 2 and a second locking nut 5, the adjusting section is provided with external threads, the first locking nut 2 and the second locking nut 5 are both sleeved on the adjusting section and located on two side wall surfaces of the annular disc 1, and the pulling claw 3 is locked and positioned on the annular disc 1 by screwing and clamping the first locking nut 2 and the second locking nut 5; in other words, the first locking nut 2 and the second locking nut 5 are similar to a clamping plate, the annular disc 1 is clamped between the first locking nut 2 and the second locking nut 5, and after the first locking nut 2 and the second locking nut 5 are tightly abutted against two side walls of the annular disc 1, the pull claw 3 is locked and positioned, and at the moment, the pull claw 3 can not rotate nor axially move; in other embodiments, a first locking nut 2 may be used, and if only one first locking nut 2 is used, a positioning step surface is formed by protruding on the adjusting section, the outer diameter of the positioning step surface is larger than the inner diameter of the through hole so as to block the movement of the annular disc 1, the positioning step surface faces one side of the annular disc 1, the other side of the positioning step surface is provided with the first locking nut 2, the first locking nut 2 and the positioning step surface are screwed in, and the annular disc 1 is clamped by the first locking nut 2 and the positioning pull claw 3 is locked.

Because the centrifugal water pump mechanical seal 6 of different styles is different in depth, therefore, the length of the pulling claw 3 is adjusted to be different in moving, if the length of the pulling claw is too long, the tensile force and the strength of the pulling claw 3 can be affected, so in this embodiment, in order to further enhance the tensile force and the uniform stress of the pulling claw 3, the disassembling tool further comprises a locking hoop 4, the locking hoop 4 is sleeved outside a ring body formed by the multiple pulling claws 3 in a surrounding manner, the circle center of the locking hoop 4 and the circle center of the annular disc 1 are on the same axis, the locking hoop 4 has a certain gathering effect, and if the locking hoop 4 is not arranged, each pulling claw 3 is separately dispersed to be hooked, so that the pulling process is relatively shaken, and the stress is not uniform.

The remaining wall part of the annular disk 1 can be used as a handle, i.e. the operator can pull the mechanical seal 6 out by holding it and pulling it outwards, or by pulling the annular disk 1 with a puller against the pump shaft, which can be tightened to separate the mechanical seal 6 from the shaft.

When the special tool is used for disassembling the mechanical seal 6, the first locking nut 2 and the second locking nut 5 are firstly loosened so as to ensure that the three adjustable pulling claws 3 can rotate in the annular disc 1 and can be adjusted at a certain angle. Then the annular disc 1 is sleeved on a pump shaft, three adjustable pulling claws 3 are inserted into a mechanical seal 6 chamber, the angles and the directions of the adjustable pulling claws 3 are adjusted, the three pulling claws 3 are guaranteed to hook the rear end of the mechanical seal 6, a locking hoop 4 is tightened, a front-end locking nut and a rear-end locking nut are tightened, then the annular disc 1 is pulled by a puller and simultaneously pushed against the pump shaft, and the mechanical seal 6 can be separated from the shaft after the puller is tightened. Adopt this instrument to dismantle, need not to dismantle the water pump housing, and 6 atress of water pump mechanical seal are even, and mechanical seal 6 can be dismantled very fast, have shortened the dismantlement time greatly, by a wide margin improved maintenance efficiency, reduced maintenance personal's intensity of labour.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are given by way of example only and are not limiting of the utility model.

The objects of the utility model have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A disassembling tool for quickly disassembling a mechanical seal of a centrifugal water pump is characterized by comprising a plurality of pulling claws (3), a locking piece and an annular disc (1), wherein each pulling claw (3) is independently and movably arranged on the annular disc (1), and the pulling claws (3) are perpendicular to the annular disc (1); each pulling claw (3) can rotate relative to the annular disc (1) to adjust the angle and/or can move along the axial direction of the annular disc (1) to adjust the extending length; the locking piece is detachably connected to the pull claw (3) and pushes against the wall surface of the annular disc (1) to lock and position the pull claw (3) on the annular disc (1).

2. A dismounting tool according to claim 1, characterized in that the pulling claw (3) comprises a lever body (31) and a hook body (32) arranged at one end of the lever body (31), the lever body (31) is provided with at least one adjusting section, the adjusting section is provided with an external thread, the locking member comprises at least one locking nut, and the locking nut is arranged on the adjusting section and can clamp and position the annular disc (1) in the adjusting section.

3. The disassembling tool according to claim 2, characterized in that the locking nut comprises a first locking nut (2) and a second locking nut (5), the first locking nut (2) and the second locking nut (5) are sleeved on the adjusting section and are arranged on two side wall surfaces of the annular disc (1), and the pulling claw (3) is locked and positioned on the annular disc (1) by screwing the first locking nut (2) and the second locking nut (5) into the clamping.

4. The disassembling tool according to claim 1, characterized in that the disassembling tool further comprises a locking hoop (4), the locking hoop (4) is sleeved outside a ring body formed by the plurality of pulling claws (3), and the circle center of the locking hoop (4) and the circle center of the annular disc (1) are coaxially arranged.

5. The disassembling tool according to claim 1, characterized in that the disassembling tool comprises three pulling claws (3), the annular disc (1) is provided with three through holes, the arc distance between adjacent through holes is equal, the aperture of the through holes is slightly larger than the diameter of the rod body (31) of the pulling claw (3), and the rod body (31) of the pulling claw (3) penetrates through the through holes.

6. A removal tool according to claim 2, characterized in that the hook portion (32) is provided with a hook opening on one side and an arcuate wall surface with a guide projection on the other side.