Stuffing box sealing structure

Abstract

The utility model provides a stuffing box sealing structure, which relates to the technical field of valves, and comprises a stuffing box main body, a valve rod is installed in the stuffing box main body and penetrates through the bottom, a gland is sleeved at the top end of the stuffing box main body and located on the periphery of the valve rod, and a placing groove is arranged at the top end of the stuffing box main body. The stuffing box comprises a stuffing box body, a containing groove is formed in the left side and the right side of the containing groove, limiting grooves are symmetrically formed in the left side and the right side of the containing groove, a gasket is arranged in the containing groove and located on the periphery of the valve rod in a sleeving mode, a plurality of stuffing pieces are stacked at the top end of the gasket, and first threaded rods are symmetrically arranged at the positions, close to the left side and the right side, of the bottom of the stuffing box body. When waste packing is replaced, a gasket can be driven by rotating a first threaded rod, so that a waste packing sheet is quickly pushed out from the interior of a placement groove, and compared with a traditional replacement mode, a special packing hook does not need to be used, so that the use convenience is greatly improved, and the practicability is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a stuffing box sealing structure. Background Art

[0002] The main function of the stuffing box seal structure is to prevent leakage and protect the normal operation of the equipment. The stuffing box seal is a contact-type dynamic seal that blocks the leakage path through the packing. It is suitable for reciprocating or rotating motion. It mainly has two types of soft packing seals and hard packing seals. The stuffing box seal is a commonly used valve stem sealing technology. The stuffing box seal structure is usually used on the valve stem of the valve. The packing is filled in the stuffing box and then compressed by the gland. The gland axially squeezes the packing, causing the packing to deform radially, thereby sealing the outer surface of the valve stem and the inner surface of the stuffing box.

[0003] The structure of the stuffing box seal mainly includes stuffing, stuffing box and stuffing fixings. The service life of the stuffing itself is short and needs to be replaced regularly. The common stuffing box seal structure is relatively simple, and the stuffing is relatively tight inside the stuffing box. A special stuffing hook is required to remove the discarded stuffing for replacement. The operation is cumbersome and lacks practicality. Therefore, we propose a stuffing box seal structure. Utility Model Content

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art. The structure of the stuffing box seal mainly includes stuffing, a stuffing box and a stuffing fixing piece. The service life of the stuffing itself is short and needs to be replaced regularly. The common stuffing box seal structure is relatively simple, and the stuffing is relatively tight inside the stuffing box. A special stuffing hook is required to take out the discarded stuffing for replacement, which is cumbersome to operate and lacks practicality.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A stuffing box sealing structure includes a stuffing box body, wherein a valve stem is installed through the bottom of the stuffing box body;

[0007] A pressure cover is provided at the top of the stuffing box body and located on the outer periphery of the valve stem. A placement groove is provided at the top of the stuffing box body, and limiting grooves are symmetrically provided on the left and right sides of the placement groove. A gasket is provided inside the placement groove and located on the outer periphery of the valve stem. Several packing sheets are stacked on the top of the gasket, and a first threaded rod is symmetrically provided near the left and right sides of the bottom of the stuffing box body.

[0008] As a preferred solution of the present invention, a second threaded rod is threadedly connected to the top of the gland near the left and right sides and passes through the bottom, and the second threaded rod is threadedly connected to the stuffing box body.

[0009] The technical effect of adopting the above further solution is: the packing sheet can be compressed by the pressure cover to make it tighter, and the pressure cover can be driven to move up and down by rotating the second threaded rod, thereby opening or closing the placement groove and improving the sealing effect.

[0010] As a preferred solution of the present invention, the gasket is made of an annular metal material, and both sides thereof protrude toward the interior of the limiting groove.

[0011] The technical effect of adopting the above further solution is: by extending the two sides of the gasket into the limiting groove, the moving gasket can be limited to prevent it from deflecting during the process of pushing out the discarded filler piece, thereby improving the stability of use.

[0012] As a preferred solution of the present invention, the gasket is rotatably connected to the first threaded rod.

[0013] The technical effect of adopting the above-mentioned further scheme is: when replacing the filler sheet, the gasket can be driven to move up and down by rotating the first threaded rod, thereby pushing the discarded filler sheet out of the placement groove. The rotational connection between the gasket and the first threaded rod can prevent the gasket from rotating spirally with the first threaded rod, thereby improving the stability of use.

[0014] As a preferred solution of the present invention, the filler sheet is in the shape of a circular ring, with both sides thereof protruding toward the interior of the limiting groove.

[0015] The technical effect of adopting the above further solution is that the filler sheet extends on both sides to the inside of the limit groove, so that the inside of the limit groove can be sealed during use to prevent leakage and improve the stability of use.

[0016] As a preferred solution of the present invention, a rotating disk is welded to the top end of the valve stem.

[0017] The technical effect of adopting the above further solution is that the valve stem can be driven to rotate by rotating the rotating disk, thereby achieving the effect of opening or closing the valve.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the utility model, through the design of the stuffing box body and the valve stem, when replacing the discarded stuffing, the gasket can be driven by rotating the first threaded rod, so that the discarded stuffing piece can be quickly pushed out from the inside of the placement groove. Compared with the traditional replacement method, there is no need to use a special stuffing hook, which greatly improves the convenience of use and effectively improves the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a stuffing box sealing structure provided by the utility model;

[0021] Figure 2 This is an overall front structural anatomical diagram of a stuffing box sealing structure provided by the utility model;

[0022] Figure 3 This is an anatomical diagram of the overall top structure of a stuffing box sealing structure provided by the utility model.

[0023] Legend: 1. Stuffing box body; 101. Gland; 1011. Second threaded rod; 102. Placement groove; 103. Limiting groove; 104. Gasket; 105. Stuffing sheet; 106. First threaded rod; 2. Valve stem; 201. Rotating disk. DETAILED DESCRIPTION

[0024] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] Example 1

[0029] like Figure 1-3As shown, the utility model provides a technical solution: a stuffing box sealing structure, including a stuffing box body 1, a valve stem 2 is installed through the bottom of the stuffing box body 1, a pressure cover 101 is provided at the top of the stuffing box body 1 and located on the outer periphery of the valve stem 2, a placement groove 102 is provided at the top of the stuffing box body 1, and limiting grooves 103 are symmetrically provided on the left and right sides of the placement groove 102, a gasket 104 is provided inside the placement groove 102 and located on the outer periphery of the valve stem 2, and a plurality of packing sheets 105 are stacked and placed on the top of the gasket 104, and a first threaded rod 106 is symmetrically provided near the left and right sides of the bottom of the stuffing box body 1. By rotating the first threaded rod 106, the gasket 104 can be driven to move up and down to achieve the purpose of replacing the packing sheet 105.

[0030] Example 2

[0031] like Figure 1-3 As shown, the top of the pressure cover 101 is connected to the second threaded rod 1011 through the bottom thread near the left and right sides. The second threaded rod 1011 is threadedly connected to the stuffing box body 1. The packing piece 105 can be pressed by the pressure cover 101 to make it tighter. The second threaded rod 1011 can be driven to move up and down by rotating the pressure cover 101, thereby opening or closing the placement groove 102 to improve the sealing effect. The gasket 104 is a circular metal material, and the two sides protrude toward the inside of the limiting groove 103. The two sides of the gasket 104 extend to the inside of the limiting groove 103, which can limit the moving gasket 104 to prevent it from deflecting in the process of pushing out the discarded packing piece 105, thereby improving the stability of use. The gasket 104 is rotatably connected to the first threaded rod 106. When replacing When the packing piece 105 is in use, the gasket 104 can be driven to move up and down by rotating the first threaded rod 106, thereby pushing the discarded packing piece 105 out from the inside of the placement groove 102. The rotational connection between the gasket 104 and the first threaded rod 106 can prevent the gasket 104 from rotating spirally with the first threaded rod 106, thereby improving the stability of use. The packing piece 105 is in a circular shape, and its two sides protrude toward the inside of the limiting groove 103. The two sides of the packing piece 105 extend to the inside of the limiting groove 103, so that the inside of the limiting groove 103 can be sealed during use to prevent leakage and improve the stability of use. A rotating disk 201 is welded to the top of the valve stem 2. By rotating the rotating disk 201, the valve stem 2 can be driven to rotate, thereby achieving the effect of opening or closing the valve.

[0032] The working process of the present invention is as follows: when replacing the waste gas packing piece 105 of a stuffing box sealing structure, first use an external wrench to rotate the second threaded rod 1011 so that it spirally exits the stuffing box body 1, thereby separating the pressure cover 101 from the stuffing box body 1, and at the same time rotate the first threaded rods 106 on both sides to drive the gasket 104 to move upward, so that the gasket 104 pushes the discarded packing piece 105 stacked on its top out from the inside of the placement groove 102. Compared with the traditional packing piece 105 replacement method, this process does not require the use of a special packing hook, which greatly improves the convenience of use and effectively improves the practicality. After all the discarded packing pieces 105 are pushed out of the placement groove 102, the first threaded rod 106 is rotated in the opposite direction to drive the gasket 104 back to its original position, and the new packing piece 105 is re-sleeved on the outer periphery of the valve stem 2 and compacted. Then, the pressure cover 101 is reset, and the second threaded rod 1011 is rotated to re-immerse it in the material box body, and the pressure cover 101 is fixed to complete the entire replacement process.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stuffing box sealing structure, comprising a stuffing box body (1), characterized in that: A valve stem (2) is installed through the bottom of the stuffing box body (1); A pressure cover (101) is provided at the top of the stuffing box body (1) and located on the outer periphery of the valve stem (2); a placement groove (102) is provided at the top of the stuffing box body (1); limiting grooves (103) are symmetrically provided on the left and right sides of the placement groove (102); a gasket (104) is provided inside the placement groove (102) and located on the outer periphery of the valve stem (2); a plurality of packing sheets (105) are stacked and placed on the top of the gasket (104); and a first threaded rod (106) is symmetrically provided near the left and right sides of the bottom of the stuffing box body (1).

2. A stuffing box sealing structure according to claim 1, characterized in that: A second threaded rod (1011) is threadedly connected to the top of the gland (101) near the left and right sides and through the bottom, and the second threaded rod (1011) is threadedly connected to the stuffing box body (1).

3. The stuffing box sealing structure according to claim 1, characterized in that: The gasket (104) is made of an annular metal material, and both sides thereof protrude toward the interior of the limiting groove (103).

4. The stuffing box sealing structure according to claim 1, characterized in that: The gasket (104) is rotatably connected to the first threaded rod (106).

5. The stuffing box sealing structure according to claim 1, characterized in that: The filler sheet (105) is in the shape of a ring, with both sides thereof protruding toward the interior of the limiting groove (103).

6. The stuffing box sealing structure according to claim 1, characterized in that: A rotating disk (201) is welded to the top end of the valve stem (2).

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