Valve gland with anti-loosening function for valve

Abstract

The utility model discloses a valve gland with anti -loose function for valve belongs to gas valve technical field, has solved present device bolt to be easy to be corroded by outside rainwater, leads to difficult to dismantle, and bolt is influenced by outside vibration, is easy to loosen, and then leads to the problem of the fastening effect of poor, including the valve cover and inside hollow gland body, the gland body is connected on the top surface of valve cover through bolt, the inside connection of valve cover and gland body has valve rod, the gland body includes inside hollow upper cylindrical end, branch and inside hollow lower cylindrical end, the first sealing pad is arranged between the top surface of upper cylindrical end and the bottom surface of upper cylindrical end and the valve cover top, the top surface of upper cylindrical end is provided with the protection pad, can absorb the vibration that valve received through first sealing pad, is favorable to improve the stability that valve cover and gland body are connected, can be shielded on the top surface and the side surface of branch through second extension and lower hanging part, can avoid bolt to be corroded by outside rainwater.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, specifically a valve gland with anti-loosening function. Background Technology

[0002] Most buried gas valve wells currently use gate valves, which are connected to underground pipelines. The valve cover of the gate valve is a key component in the stuffing box area of ​​the gate valve. The valve cover cooperates with the valve stem to limit the radial displacement of the valve stem, ensure the vertical movement accuracy of the gate during opening and closing, and avoid gate offset caused by vibration. The valve cover is connected to the valve cover by bolts.

[0003] A search revealed that patent application number 201920560270.6 discloses a buried valve gland, comprising a gland body, a valve stem, and a valve cover. The gland body is an integral hollow structure, including two symmetrical supports, two sealing ring grooves, and a hollow cylindrical end, with the two sealing ring grooves located on the inner wall of the gland body. The valve stem is a non-uniform diameter cylindrical integral structure inserted into the hollow gland body. The valve cover is a hollow cylindrical disc, with the hollow cylindrical end of the gland body inserted into the hollow valve cover.

[0004] Although the buried valve gland incorporates two O-ring seals to prevent sand from entering the gap between the valve stem and the gland body, protecting the internal seals and reducing wear on the gland, the bolts connecting the gland and valve cover lack effective protection. When the equipment is outdoors or in a humid environment, rainwater easily comes into direct contact with the bolt surface, causing the bolt metal to oxidize with moisture and oxygen in the air, gradually forming rust. As corrosion intensifies, the threaded gap between the bolt and nut becomes filled with rust, significantly increasing disassembly resistance and even causing jamming. Furthermore, the equipment inevitably vibrates during operation. Without additional protective structures to ensure tightness, the bolt preload gradually decreases under continuous vibration, leading to loosening. Once the bolts loosen, the tightness between the gland and valve cover deteriorates significantly, potentially causing seal failure and media leakage, and affecting the stability of the entire equipment structure, posing a significant safety hazard.

[0005] Therefore, we propose a valve gland with anti-loosening function for valves. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a valve gland with an anti-loosening function, which solves the problems that the bolts of existing devices are easily corroded by external rainwater, making them difficult to disassemble, and that the bolts are easily loosened by external vibrations, resulting in a poor tightening effect.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a valve cover with anti-loosening function, comprising a valve cover and an internal hollow cover body, wherein the cover body is bolted to the top surface of the valve cover, and a valve stem is connected inside the valve cover and the cover body;

[0008] The pressure cap body includes an internally hollow upper cylindrical end, a support end, and an internally hollow lower cylindrical end. The support end is fixedly installed on the left and right sides of the arc surface of the upper cylindrical end, and the lower cylindrical end is fixedly installed on the bottom surface of the upper cylindrical end. The inner diameters of the upper and lower cylindrical ends are the same, and the outer diameter of the upper cylindrical end is 1.2 times the outer diameter of the lower cylindrical end. The lower cylindrical end is movably fitted inside the valve cover, and the outer diameter of the lower cylindrical end is the same as the inner diameter of the valve cover. A first sealing gasket is provided between the bottom surface of the upper cylindrical end and the top surface of the valve cover, and a protective gasket is provided on the top surface of the upper cylindrical end.

[0009] The protective pad includes a second annular portion, a second extension portion, and a hanging portion. The second annular portion is fixedly installed in the middle of the top surface of the upper cylindrical end. The second extension portion is fixedly connected to both the left and right sides of the arc surface of the second annular portion. The hanging portion is fixedly connected to the side of the bottom surface of the second extension portion away from the second annular portion.

[0010] Preferably, the inner diameter of the second annular portion is the same as the inner diameter of the upper cylindrical end, the outline of the second extension portion is the same as the outline of the top surface of the support end, and the outline of the lower hanging portion is the same as the outline of the side surface of the support end. The second annular portion can increase the sealing between the valve stem and the top of the upper cylindrical end, and the second extension portion and the lower hanging portion can shield the top and side surfaces of the support end, thereby preventing external rainwater from contacting the bolts in the threaded holes and preventing the bolts from being corroded by rainwater.

[0011] Preferably, the thickness of the second extension is half the thickness of the second annular portion, the thickness of the second extension and the hanging portion are the same, and the second annular portion, the second extension and the hanging portion are integrally formed, so as to facilitate bending of the second extension.

[0012] Preferably, the first sealing gasket includes a first annular portion, a first extension portion, and a circular hole. The first annular portion is fixedly installed on the bottom surface of the upper cylindrical end. The inner diameter of the first annular portion is the same as the inner diameter of the lower cylindrical end, and the diameter of the first annular portion is the same as the diameter of the upper cylindrical end. The outline of the first extension portion is the same as the outline of the bottom surface of the support end. A circular hole is provided on the top surface of the first extension portion. The sealing performance between the gland body and the valve cover can be increased by filling the space between the bottom surface of the upper cylindrical end and the support end and the top surface of the valve cover by the first annular portion and the first extension portion. The first sealing gasket can also absorb the vibration of the valve and prevent the bolts from loosening.

[0013] Preferably, the top surface of the support end is provided with a threaded hole, and the bolt passes through the threaded hole and the round hole and is threaded onto the valve cover. The method of using bolts to connect the gland body and the valve cover is existing technology and will not be described in detail here.

[0014] Preferably, the upper cylindrical end, the support end, and the lower cylindrical end are integrally formed, wherein the integrally formed structure is stable, reliable, and has a long service life.

[0015] This utility model provides a valve gland with anti-loosening function. It has the following beneficial effects:

[0016] This valve gland with anti-loosening function uses bolts to press the upper cylindrical end and the support end onto the top surface of the first annular portion and the first extension portion. This increases the sealing performance between the valve cover and the gland body, and the first sealing gasket can absorb the vibration of the valve, thereby preventing the bolts from loosening and improving the stability of the connection between the valve cover and the gland body. The second annular portion increases the sealing performance between the top of the gland body and the valve stem, and also prevents external debris from entering the interior of the gland body, which helps protect the valve. Furthermore, the second extension portion and the lower hanging portion can shield the top and sides of the support end, preventing the bolts from being corroded by external rainwater. This solves the problems of existing devices where bolts are easily corroded by external rainwater, making them difficult to disassemble, and bolts are easily loosened by external vibrations, resulting in poor tightening effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the protective pad structure of this utility model.

[0021] In the figure: 1. Valve cover; 2. Gland body; 21. Upper cylindrical end; 22. Support end; 221. Threaded hole; 23. Lower cylindrical end; 3. First sealing gasket; 31. First annular part; 32. First extension part; 33. Circular hole; 4. Protective gasket; 41. Second annular part; 42. Second extension part; 43. Lower hanging part. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] like Figure 1-4 As shown: The valve includes a valve cover 1 and an internally hollow gland body 2. The gland body 2 is bolted to the top surface of the valve cover 1. A valve stem is internally connected to the valve cover 1 and the gland body 2. The gland body 2 includes an internally hollow upper cylindrical end 21, a support end 22, and an internally hollow lower cylindrical end 23. The support end 22 is fixedly installed on the left and right sides of the arc surface of the upper cylindrical end 21, and the lower cylindrical end 23 is fixedly installed on the bottom surface of the upper cylindrical end 21. The inner diameters of the upper cylindrical end 21 and the lower cylindrical end 23 are the same, and the outer diameter of the upper cylindrical end 21 is 1.2 times the outer diameter of the lower cylindrical end 23. The lower cylindrical end 23 is movably fitted onto... Inside the valve cover 1, the outer diameter of the lower cylindrical end 23 is the same as the inner diameter of the valve cover 1. A first sealing gasket 3 is provided between the upper cylindrical end 21 and the bottom surface of the upper cylindrical end 21 and the top surface of the valve cover 1. A protective gasket 4 is provided on the top surface of the upper cylindrical end 21. The protective gasket 4 includes a second annular portion 41, a second extension portion 42 and a hanging portion 43. The second annular portion 41 is fixedly installed in the middle of the top surface of the upper cylindrical end 21. The second extension portion 42 is fixedly connected to both the left and right sides of the arc surface of the second annular portion 41. The hanging portion 43 is fixedly connected to the side of the bottom surface of the second extension portion 42 away from the second annular portion 41.

[0025] The second annular portion 41 can increase the sealing between the top of the gland body 2 and the valve stem, and can also prevent external debris from entering the interior of the gland body 2, which is beneficial for protecting the valve. In addition, the second extension portion 42 and the hanging portion 43 can cover the top and side surfaces of the support end 22, which can prevent the bolts from being corroded by external rainwater.

[0026] Furthermore, the inner diameter of the second annular portion 41 is the same as the inner diameter of the upper cylindrical end 21, the outline of the second extension portion 42 is the same as the outline of the top surface of the support end 22, and the outline of the lower hanging portion 43 is the same as the outline of the side surface of the support end 22.

[0027] The second annular portion 41 can increase the sealing between the valve stem and the top of the upper cylindrical end 21. The second extension portion 42 and the lower hanging portion 43 can shield the top and side surfaces of the support end 22, thereby preventing external rainwater from contacting the bolt in the threaded hole 221 and preventing the bolt from being corroded by rainwater.

[0028] Furthermore, the thickness of the second extension 42 is half the thickness of the second annular portion 41, and the thickness of the second extension 42 and the hanging portion 43 is the same. The second annular portion 41, the second extension 42 and the hanging portion 43 are integrally formed structures.

[0029] This is to facilitate bending of the second extension 42.

[0030] Furthermore, the first sealing gasket 3 includes a first annular portion 31, a first extension portion 32, and a circular hole 33. The first annular portion 31 is fixedly installed on the bottom surface of the upper cylindrical end 21. The inner diameter of the first annular portion 31 is the same as the inner diameter of the lower cylindrical end 23, and the diameter of the first annular portion 31 is the same as the diameter of the upper cylindrical end 21. The outline of the first extension portion 32 is the same as the outline of the bottom surface of the support end 22, and a circular hole 33 is provided on the top surface of the first extension portion 32.

[0031] The first annular portion 31 and the first extension portion 32 fill the space between the bottom surface of the upper cylindrical end 21 and the support end 22 and the top surface of the valve cover 1, which can increase the sealing of the connection between the gland body 2 and the valve cover 1, and the first sealing gasket 3 can absorb the vibration of the valve and prevent the bolts from loosening.

[0032] Furthermore, the top surface of the support end 22 is provided with a threaded hole 221. The bolt passes through the threaded hole 221 and the round hole 33 and is threaded onto the valve cover 1. The method of using bolts to connect the gland body 2 and the valve cover 1 is existing technology and will not be described in detail here.

[0033] Furthermore, the upper cylindrical end 21, the support end 22, and the lower cylindrical end 23 are integrally formed structures;

[0034] Among them, the one-piece molded structure is stable and reliable, and has a long service life.

[0035] The working principle and usage process of this utility model: This valve cover with anti-loosening function is used by passing a bolt through the threaded hole 221 and the round hole 33 and threading the bolt onto the valve cover 1, thereby connecting the valve cover 1 and the cover body 2 together. By pressing the upper cylindrical end 21 and the support end 22 onto the top surface of the first annular part 31 and the first extension part 32 with the bolt, the sealing between the valve cover 1 and the cover body 2 can be increased. The second annular part 41 can increase the sealing between the top of the cover body 2 and the valve stem, preventing external debris from entering the interior of the cover body 2. Furthermore, the second extension part 42 and the lower hanging part 43 can shield the top and side surfaces of the support end 22, protecting the bolt and preventing it from being corroded by external rainwater.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve cover with anti-loosening function, comprising a valve cover (1) and an internally hollow cover body (2), wherein the cover body (2) is bolted to the top surface of the valve cover (1), and a valve stem is connected inside the valve cover (1) and the cover body (2); Its features are: The pressure cap (2) includes an internally hollow upper cylindrical end (21), a support end (22), and an internally hollow lower cylindrical end (23). The support end (22) is fixedly installed on the left and right sides of the arc surface of the upper cylindrical end (21), and the lower cylindrical end (23) is fixedly installed on the bottom surface of the upper cylindrical end (21). The inner diameters of the upper cylindrical end (21) and the lower cylindrical end (23) are the same, and the outer diameter of the upper cylindrical end (21) is 1.2 times the outer diameter of the lower cylindrical end (23). The lower cylindrical end (23) is movably fitted inside the valve cover (1). The outer diameter of the lower cylindrical end (23) is the same as the inner diameter of the valve cover (1). A first sealing gasket (3) is provided between the bottom surface of the upper cylindrical end (21) and the top surface of the valve cover (1), and a protective gasket (4) is provided on the top surface of the upper cylindrical end (21). The protective pad (4) includes a second annular portion (41), a second extension portion (42), and a hanging portion (43). The second annular portion (41) is fixedly installed in the middle of the top surface of the upper cylindrical end (21). The second extension portion (42) is fixedly connected to both the left and right sides of the arc surface of the second annular portion (41). The hanging portion (43) is fixedly connected to the side of the bottom surface of the second extension portion (42) away from the second annular portion (41).

2. A valve gland with anti-loosening function according to claim 1, characterized in that: The inner diameter of the second annular portion (41) is the same as the inner diameter of the upper cylindrical end (21), the outline of the second extension portion (42) is the same as the outline of the top surface of the support end (22), and the outline of the lower hanging portion (43) is the same as the outline of the side surface of the support end (22).

3. A valve gland with anti-loosening function according to claim 2, characterized in that: The thickness of the second extension (42) is half the thickness of the second annular portion (41). The thickness of the second extension (42) and the hanging portion (43) are the same. The second annular portion (41), the second extension (42) and the hanging portion (43) are integrally formed.

4. A valve gland with anti-loosening function according to claim 1, characterized in that: The first sealing gasket (3) includes a first annular portion (31), a first extension portion (32), and a circular hole (33). The first annular portion (31) is fixedly installed on the bottom surface of the upper cylindrical end (21). The inner diameter of the first annular portion (31) is the same as the inner diameter of the lower cylindrical end (23). The diameter of the first annular portion (31) is the same as the diameter of the upper cylindrical end (21). The outline of the first extension portion (32) is the same as the outline of the bottom surface of the support end (22). A circular hole (33) is provided on the top surface of the first extension portion (32).

5. A valve gland with anti-loosening function according to claim 4, characterized in that: The top surface of the support (22) is provided with a threaded hole (221), and the bolt passes through the threaded hole (221) and the round hole (33) and is threaded onto the valve cover (1).

6. A valve gland with anti-loosening function according to claim 1, characterized in that: The upper cylindrical end (21), the support end (22), and the lower cylindrical end (23) are integrally formed structures.

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