Plug valve mounting and dismounting tool

Abstract

The utility model relates to a tool for assembling and disassembling a plug valve. The limiting device comprises a limiting ring, the limiting ring is of a separable structure and is formed by splicing at least two limiting units arranged in the circumferential direction, and the limiting ring comprises a first limiting part and a second limiting part which are arranged along an inner hole of the limiting ring and distributed in the axial direction; a third limiting part matched with the first limiting part is arranged at a shaft head of the cock; the connecting rod partially extends into the limiting ring and comprises a fourth limiting part matched with the second limiting part; the positioning ring can be arranged on the periphery of the limiting ring in a sleeving mode so that the multiple limiting units can be positioned and form a whole; and when the connecting rod is pulled outwards along the plug valve, the force of pulling the positioning ring by the connecting rod can be converted into the force of pulling the plug cock by the positioning ring. According to the utility model, the plug valve can be assembled and disassembled more quickly, simply and conveniently, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tooling, in particular to a tooling for installing and disassembling a plug valve. Background Art

[0002] Currently, disassembly of plug valves is typically performed by machining threads on the top of the valve stem and screwing in a lifting eye screw. Installing the plug requires a press to press it into the valve body, a relatively complex process. This leads to low production efficiency, as repeated disassembly steps are required if installation is not done correctly once. Summary of the Invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the problem of low installation and disassembly efficiency of plug valves in the prior art, and to provide a plug valve installation and disassembly tool that can improve assembly efficiency and shorten the production cycle of the valve.

[0004] In order to solve the above technical problems, the present invention provides a plug valve installation and disassembly tool, the plug valve includes a valve body and a plug installed in the valve body and rotatable, the tool includes:

[0005] The limiting ring is a detachable structure composed of at least two circumferentially arranged limiting units. The limiting ring includes a first limiting portion and a second limiting portion, which are respectively arranged along the inner hole and distributed in the axial direction. The shaft head of the plug is provided with a third limiting portion that cooperates with the first limiting portion.

[0006] a connecting rod, part of which extends into the limiting ring and includes a fourth limiting portion cooperating with the second limiting portion;

[0007] A positioning ring, which can be sleeved on the outer circumference of the limiting ring to position the plurality of limiting units and form a whole;

[0008] When the connecting rod is pulled outward along the stopcock, the force of the connecting rod pulling the positioning ring can be converted into the force of the positioning ring pulling the stopcock.

[0009] In one embodiment of the present invention, the first limiting portion is a groove, and the third limiting portion is a protrusion; or, the first limiting portion is a protrusion, and the third limiting portion is a groove; the protrusion and the groove are fitted together.

[0010] In one embodiment of the present invention, the protrusion and / or the groove are both annular.

[0011] In one embodiment of the present invention, the second limiting portion is constructed as a first boss extending radially along the inner hole of the limiting ring, and the fourth limiting portion is constructed as a second boss extending radially along the connecting rod and capable of abutting against the first boss.

[0012] In one embodiment of the present invention, the first boss is located at the bottom end of the connecting rod, and the first boss and / or the second boss are annular.

[0013] In one embodiment of the present invention, a positioning boss is axially extended from the outer side wall of the limiting ring and is capable of abutting against one axial end of the positioning ring.

[0014] In one embodiment of the present invention, the positioning boss and the second limiting portion are respectively located at two opposite axial ends of the limiting ring.

[0015] In one embodiment of the present invention, the positioning boss is annular, and one axial end of the positioning ring is in plane contact with the positioning boss.

[0016] In one embodiment of the present invention, the limiting units include two symmetrically arranged ones.

[0017] In one embodiment of the present invention, the plug valve further includes a bushing, a thrust pad, a diaphragm, a gasket, a valve cover, a hexagon socket screw of the valve cover, an adjusting ring, a sealing ring, a packing pad, a first packing, a second packing, a pressure ring, a set screw, an anti-static ring, a dust ring, and a hexagon socket screw of the packing; a bushing is installed between the valve body mounting cavity and the upper shoulder and the lower shoulder of the plug respectively; the adjusting ring presses the thrust pad and one end of the diaphragm to the upper shoulder of the plug; the valve cover is installed on the upper end of the valve body and presses the other end of the diaphragm to the valve body, and the A gasket is installed between the valve cover and the upper end of the valve body; the stuffing boxes formed by the adjusting ring, the plug shaft head and the valve cover are respectively filled with a first packing and a second packing; a packing socket hexagon screw is connected between the adjusting ring and the pressure ring, and the first packing and the second packing are compressed by the pressure ring; a set screw and a valve cover socket hexagon screw are respectively installed between the top and the side of the valve cover to respectively abut against the top and the side of the pressure ring; a packing pad and a sealing ring are also sequentially installed at the bottom of the stuffing box on the plug shaft head side in a direction away from the first packing;

[0018] An anti-static ring and a dustproof ring are installed between the plug shaft head and the valve cover.

[0019] The above technical solution of the present invention has the following advantages over the prior art:

[0020] The present invention provides a plug valve installation and disassembly tool, which makes the installation and disassembly process of the plug valve faster and simpler through the coordinated action of a limit ring, a connecting rod and a positioning ring, thereby greatly improving production efficiency.

[0021] The overall structural design of the tooling of the present invention is simple, easy to manufacture and maintain, and can be processed using low-cost materials, thus having low manufacturing and operating costs.

[0022] The concave-convex fitting structure and the annular limiting portion of the present invention ensure the stability and accurate alignment of the plug during installation and removal, thereby avoiding incorrect assembly and potential damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the plug valve of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the tooling of the present invention.

[0026] Figure 3 yes Figure 2 A partial enlarged schematic diagram.

[0027] Description of the accompanying drawings:

[0028] 1. Valve body; 2. Plug; 2a. Third stopper; 3. Bushing; 4. Thrust washer; 5. Diaphragm; 6. Gasket; 7. Bonnet; 8. Hexagon socket head cap screw; 9. Adjusting ring; 10. Sealing ring; 11. Packing pad; 12a. First packing; 12b. Second packing; 13. Pressing ring; 14. Set screw; 15. Antistatic ring; 17. Dust seal; 18. Hexagon socket head cap screw for packing.

[0029] 21, limiting ring; 21a, first limiting portion; 21b, second limiting portion; 21c, positioning boss; 211, limiting unit;

[0030] 22. Connecting rod; 22a. Fourth limiting portion;

[0031] 23. Positioning ring. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0033] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0034] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0035] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Reference Figures 1 to 3 As shown, a plug valve installation and disassembly tool of the present invention includes a valve body 1 and a plug 2 installed in the valve body 1 and rotatable. The tool includes:

[0037] The limiting ring 21 is a detachable structure composed of at least two circumferentially arranged limiting units 211. The limiting ring 21 includes a first limiting portion 21a and a second limiting portion 21b, which are respectively arranged along its inner hole and distributed in the axial direction. The shaft head of the tap 2 is provided with a third limiting portion 2a that cooperates with the first limiting portion 21a.

[0038] a connecting rod 22, which partially extends into the limiting ring 21 and includes a fourth limiting portion 22a that cooperates with the second limiting portion 21b;

[0039] The positioning ring 23 can be sleeved on the outer circumference of the limiting ring 21 to position the plurality of limiting units 211 and form a whole;

[0040] When the connecting rod 22 is pulled outward along the stopcock, the force of the connecting rod 22 pulling the positioning ring 23 can be converted into the force of the positioning ring 23 pulling the stopcock 2 .

[0041] It can be understood that the positioning ring 23 is an integral structure, which can position and lock multiple limit units 211 in the axial and radial directions to ensure that each limit unit 211 does not move, and because the positioning ring 23 is simultaneously coordinated with the connecting rod 22 and the plug 2, it can be pulled out together with the plug 2 when the connecting rod 22 is pulled outward.

[0042] Specifically, the first limiting portion 21a is a groove, and the third limiting portion 2a is a protrusion; or, the first limiting portion 21a is a protrusion, and the third limiting portion 2a is a groove; the protrusion and the groove are fitted together.

[0043] With such arrangement, the concave-convex fitting structure facilitates pulling the cock 2 without displacement.

[0044] In some embodiments, the protrusion and / or the groove are both annular in shape, and the center of the annular shape passes through the central axis of the shaft head of the plug 2, thereby ensuring the axial movement stability of the plug 2 when pulled.

[0045] In some embodiments, the second limiting portion 21b is constructed as a first boss extending radially along the inner hole of the limiting ring 21, and the fourth limiting portion 22a is constructed as a second boss extending radially along the connecting rod 22 and capable of abutting against the first boss.

[0046] The first boss is located at the bottom end of the connecting rod 22 , and the first boss and / or the second boss are annular.

[0047] In this arrangement, since the first boss is located at the bottom end of the connecting rod 22, which is opposite to the end of the shaft head of the plug 2, when the connecting rod 22 is pressed down, it abuts against the shaft head of the plug 2, and the plug 2 can be installed.

[0048] In some embodiments, a positioning boss 21c is axially extended from the outer side wall of the limiting ring 21 and is capable of abutting against one axial end of the positioning ring 23; the positioning boss 21c and the second limiting portion 21b are respectively located at two opposite axial ends of the limiting ring 21; the positioning boss 21c is annular, and one axial end of the positioning ring 23 is in plane contact with the positioning boss 21c.

[0049] Specifically, the limiting units 211 include two symmetrically arranged ones, which are easy to process.

[0050] The overall structure of the tool is simple, and the positioning ring 23 can be processed from a steel pipe, which has low cost and strong applicability.

[0051] When in use, multiple limit units 211 are clamped to the plug 2 and the connecting rod 22, and the positioning ring 23 is locked to the limit ring 21. The plug 2 can be pulled out together with the connecting rod 22, and the plug 2 can be installed by pressing down the connecting rod 22, thereby achieving the function of quick installation and disassembly of the plug valve.

[0052] Specifically, when the plug 2 needs to be disassembled, the multiple limiting units 211 of the limiting ring 21 are arranged and spliced ​​together along the circumferential direction, so that the first limiting portion 21a in the inner hole cooperates with the third limiting portion 2a of the plug 2; at the same time, the connecting rod 22 partially extends into the limiting ring 21, ensuring that the fourth limiting portion 22a on the connecting rod 22 cooperates with the second limiting portion 21b in the limiting ring 21; the positioning ring 23 is set to the outer periphery of the limiting ring 21, locking the multiple limiting units 211 to form a whole, and pulling the connecting rod 22 outward along the plug valve to pull out the plug 2 and complete the disassembly. When installing, the operation is reversed, and by pressing down the connecting rod 22, the fourth limiting portion (22a) (second boss) in the limiting ring 21 is abutted against the end of the shaft head of the plug 2, and the plug 2 is installed in place.

[0053] Reference Figure 1 As shown, the plug valve also includes a bushing 3, a thrust pad 4, a diaphragm 5, a gasket 6, a valve cover 7, a valve cover hexagon socket screw 8, an adjusting ring 9, a sealing ring 10, a packing pad 11, a first packing 12a, a second packing 12b, a pressure ring 13, a set screw 14, an anti-static ring 15, a dust ring 17, and a packing hexagon socket screw 18;

[0054] Bushings 3 are installed between the mounting cavity of the valve body 1 and the upper and lower shaft shoulders of the plug 2 respectively;

[0055] The adjusting ring 9 presses the thrust pad 4 and one end of the diaphragm 5 against the upper shoulder of the cock 2;

[0056] The valve cover 7 is installed on the upper end of the valve body 1 and presses the other end of the diaphragm 5 against the valve body 1. A gasket 6 is installed between the valve cover 7 and the upper end of the valve body 1.

[0057] The stuffing boxes formed by the adjusting ring 9, the shaft head of the plug 2 and the valve cover 7 are respectively filled with a first packing 12a and a second packing 12b. A packing hexagon socket screw 18 is connected between the adjusting ring 9 and the pressure ring 13, and the first packing 12a and the second packing 12b are compressed by the pressure ring 13.

[0058] A set screw 14 and a hexagon socket screw 8 are respectively installed between the top and side of the valve cover 7 to respectively abut against the top and side of the pressure ring 13;

[0059] The bottom of the stuffing box on the shaft head side of the cock 2 is also installed with a stuffing pad 11 and a sealing ring 10 in sequence in a direction away from the first stuffing 12a;

[0060] An anti-static ring 15 and a dust ring 17 are installed between the shaft head of the cock 2 and the valve cover 7.

[0061] The setting of the adjusting ring 9 ensures that the thrust pad 4 and the diaphragm 5 can accurately press the shaft shoulder on the plug 2, thereby improving the installation accuracy of the entire plug valve.

[0062] By tightening the multiple layers of packing (the first packing 12a and the second packing 12b), combined with the structures such as the pressure ring 13, the packing pad 11 and the sealing ring 10, the good sealing performance of the plug 2 during operation can be ensured; the anti-static ring 15 installed between the shaft head of the plug 2 and the valve cover 7 effectively avoids the damage caused by static electricity accumulation and improves safety; the setting of the bushing 3 reduces the direct friction between the plug 2 and the valve body 1, extending the service life of both, and the setting of the dust ring 17 can effectively prevent the corrosion of the plug 2 by media such as steam.

[0063] The designed pressure ring 13, set screw 14 and adjustment ring 9 can be used to conveniently adjust the sealing pressure or perform maintenance.

[0064] The tooling can be used as a module on wedge-shaped valves, such as plug valves and gate valves, to improve assembly efficiency and shorten the valve production cycle.

[0065] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plug valve installation and disassembly tool, the plug valve comprising a valve body (1) and a plug (2) rotatably installed in the valve body (1), characterized in that: The tooling includes: The limiting ring (21) is a separable structure and is composed of at least two limiting units (211) arranged along the circumferential direction, the limiting ring (21) comprising a first limiting portion (21a) and a second limiting portion (21b) respectively arranged along the inner hole thereof and distributed along the axial direction; wherein a third limiting portion (2a) cooperating with the first limiting portion (21a) is arranged at the shaft head of the cock (2); a connecting rod (22), a portion of which extends into the limiting ring (21) and comprises a fourth limiting portion (22a) cooperating with the second limiting portion (21b); A positioning ring (23) capable of being sleeved on the outer circumference of the limiting ring (21) to position the plurality of limiting units (211) and form a whole; When the connecting rod (22) is pulled outward along the stopcock, the force of the connecting rod (22) pulling the positioning ring (23) can be converted into the force of the positioning ring (23) pulling the stopcock (2).

2. A plug valve installation and disassembly tool according to claim 1, characterized in that: The first limiting portion (21a) is a groove, and the third limiting portion (2a) is a protrusion; or the first limiting portion (21a) is a protrusion, and the third limiting portion (2a) is a groove; the protrusion and the groove are fitted together.

3. A plug valve installation and disassembly tool according to claim 2, characterized in that: The protrusion and / or the groove are both annular.

4. A plug valve installation and disassembly tool according to claim 1, characterized in that: The second limiting portion (21b) is configured as a first boss extending radially along the inner hole of the limiting ring (21), and the fourth limiting portion (22a) is configured as a second boss extending radially along the connecting rod (22) and capable of abutting against the first boss.

5. A plug valve installation and disassembly tool according to claim 4, characterized in that: The first boss is located at the bottom end of the connecting rod (22), and the first boss and / or the second boss are ring-shaped.

6. A plug valve installation and disassembly tool according to claim 1, characterized in that: A positioning boss (21c) is axially extended from the outer side wall of the limiting ring (21) and is capable of abutting against one axial end of the positioning ring (23).

7. A plug valve installation and disassembly tool according to claim 6, characterized in that: The positioning boss (21c) and the second limiting portion (21b) are respectively located at two axially opposite ends of the limiting ring (21).

8. The plug valve installation and disassembly tool according to claim 6, characterized in that: The positioning boss (21c) is annular, and one axial end of the positioning ring (23) is in plane contact with the positioning boss (21c).

9. The plug valve installation and disassembly tool according to claim 1, characterized in that: The limiting units (211) include two symmetrically arranged ones.

10. The plug valve installation and disassembly tool according to claim 1, characterized in that: The plug valve further comprises a bushing (3), a thrust pad (4), a diaphragm (5), a gasket (6), a valve cover (7), a valve cover hexagon socket screw (8), an adjustment ring (9), a sealing ring (10), a packing pad (11), a first packing (12a), a second packing (12b), a pressure ring (13), a set screw (14), an antistatic ring (15), a dustproof ring (17), and a packing hexagon socket screw (18); Bushings (3) are installed between the mounting cavity of the valve body (1) and the upper and lower shaft shoulders of the plug (2); The adjusting ring (9) presses the thrust pad (4) and one end of the diaphragm (5) against the upper shoulder of the plug (2); The valve cover (7) is mounted on the upper end of the valve body (1) and presses the other end of the diaphragm (5) against the valve body (1), and a gasket (6) is installed between the valve cover (7) and the upper end of the valve body (1); The stuffing boxes formed by the adjusting ring (9), the shaft head of the plug (2) and the valve cover (7) are respectively filled with a first stuffing (12a) and a second stuffing (12b); a stuffing socket hexagon screw (18) is connected between the adjusting ring (9) and the pressure ring (13); the first stuffing (12a) and the second stuffing (12b) are compressed by the pressure ring (13); A set screw (14) and a valve cover hexagon socket screw (8) are respectively installed between the top and the side of the valve cover (7) to respectively abut against the top and the side of the pressure ring (13); A stuffing pad (11) and a sealing ring (10) are installed in sequence at the bottom of the stuffing box on the shaft head side of the cock (2) in a direction away from the first stuffing (12a); An antistatic ring (15) and a dustproof ring (17) are installed between the shaft head of the plug (2) and the valve cover (7).

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