Valve cap with sealing structure

Abstract

The utility model discloses a valve cap with sealing structure belongs to valve cap technical field, aims at solving the sealing structure of valve cap in the prior art mostly adopts the cooperation of cap plus sealing washer to reach the sealing operation to valve connecting shaft end, however single sealing structure is extremely low when facing complex working condition fault tolerance, when medium pressure fluctuation is violent or long -term is in high pressure state, and sealing material is easy to appear fatigue deformation, and tiny crack or gap will become leakage passage, and in the medium environment containing particle impurity, and the impurity enters the sealing surface and can accelerate the wear, thereby leading to the problem of the rapid decline of sealing performance. Including the cap main part, the middle part periphery of cap main part is divided and is equipped with mounting mechanism, and the inner end of cap main part is equipped with double sealing mechanism, the double sealing mechanism includes fixed column, and the fixed column is fixed in the inner end middle part of cap main part, and the end of fixed column is fixedly connected with metal seal cover.

Description

Technical Field

[0001] This utility model belongs to the field of valve cap technology, specifically relating to a valve cap with a sealing structure. Background Technology

[0002] Valve caps are an important component of valves. They are used to nest the end of the valve connecting shaft to ensure the sealing of the connection, thereby improving the sealing between the valve connecting shaft and the valve body.

[0003] Nowadays, valve cap sealing structures mostly use a cap plus a sealing gasket to achieve sealing of the valve connecting shaft end. However, a single sealing structure has a very low fault tolerance rate when facing complex working conditions. When the medium pressure fluctuates drastically or is under high pressure for a long time, the sealing material is prone to fatigue deformation, and tiny cracks or gaps will become leakage channels. In a medium environment containing particulate impurities, the impurities will enter the sealing surface and accelerate wear, thus causing the sealing performance to decline rapidly. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a valve cap with a sealing structure. This aims to solve the problem that existing valve cap sealing structures often use a cap plus a sealing gasket to achieve sealing of the valve connecting shaft end. However, a single sealing structure has a very low fault tolerance rate when facing complex working conditions. When the medium pressure fluctuates drastically or is under high pressure for a long time, the sealing material is prone to fatigue deformation, and tiny cracks or gaps will become leakage channels. In a medium environment containing particulate impurities, the impurities will enter the sealing surface and accelerate wear, thus causing a rapid decline in sealing performance.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a valve cap with a sealing structure, including a cap body, an installation mechanism is provided around the middle of the cap body, and a double sealing mechanism is provided at the inner end of the cap body. The double sealing mechanism includes a fixing post, which is fixedly disposed in the middle of the inner end of the cap body. A metal sealing sleeve is fixedly connected to the end of the fixing post, and a sealing component is assembled around and above the fixing post.

[0008] Furthermore, the inner end post of the metal sealing sleeve is sized to match the opening size at the middle of its valve, and the two are connected by an embedded fitting.

[0009] Furthermore, the sealing assembly includes a spring bracket, which is fixedly assembled to the inner end of the cap body. A pressure bracket is connected to the top of the spring bracket, and an embedding ring groove is provided at the inner ring of the middle periphery of the pressure bracket. An anti-detachment ring is fixedly provided on the inner ring above the embedding ring groove, and a rubber sealing ring is embedded above the embedding ring groove.

[0010] Furthermore, the groove for embedding the ring is fitted with a ring of a size that matches the size of the rubber sealing ring, and the groove for embedding the ring, in conjunction with the anti-detachment ring and the pressure frame, can provide pressure and anti-deviation connection for the rubber sealing ring.

[0011] Furthermore, the size of the rubber sealing ring is slightly larger than the peripheral ring diameter of the metal sealing sleeve.

[0012] Furthermore, the mounting mechanism includes multiple threaded slots, which are located around the center of the cap body. A connecting bolt is threaded into the center of each threaded slot, and a locking nut is fitted onto the end of the connecting bolt.

[0013] Furthermore, the locking nut and the connecting bolt form a threaded connection, and the connecting bolt utilizes the threaded slot to simultaneously form a threaded joint connection with the cap body and the valve end.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the installed state, the metal sealing sleeve at the end of the fixing post inside the cap body is sealed and embedded in the middle of the valve, forming an initial seal on the valve end. Simultaneously, the spring bracket installed around the fixing post inside the cap body continuously pushes the pressure bracket using its own restoring elasticity. The rubber sealing ring embedded in the annular groove of the pressure bracket, under the action of the spring bracket, always tightly presses against the annular edge of the metal sealing sleeve. When the metal sealing sleeve leaks due to microscopic surface defects, the rubber sealing ring, through elastic deformation combined with the restoring force of the spring bracket, promptly fills the gap, effectively preventing leakage. Furthermore, the spring bracket also has an important long-term protection function; even if the rubber sealing ring hardens and loses elasticity due to aging in the later stages, it can still maintain the sealing effect through elastic compensation, ensuring the reliability and long-term effectiveness of the valve sealing system.

[0017] When installing the cap body, first align its inner end with the installation end of the valve connection. Then, guide the corresponding connecting bolts through the threaded slots of the screw holes. Finally, use the locking nut to secure the cap body and valve connection tightly. It is worth mentioning that during installation, bolts in diagonal positions should be selected first. After both sets of diagonal connecting bolts have passed through the cap body and valve connection and are initially tightened, repeat the above operation by selecting two adjacent sets of screw holes in a clockwise or counterclockwise direction. This ensures that the torque value meets the design requirements and that the torque difference between each bolt is within the allowable error range, achieving a stable and reliable connection between the cap body and the valve connection, effectively avoiding problems such as seal failure or component damage caused by uneven force. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0021] Figure 3 This is a schematic diagram of a three-dimensional disassembled structure;

[0022] Figure 4 This is a schematic diagram of a partial structure of the sealing assembly.

[0023] The markings in the attached diagram are as follows: 1. Cap body; 2. Mounting mechanism; 21. Screw-in slot; 22. Connecting bolt; 23. Locking nut; 3. Double sealing mechanism; 31. Fixing post; 32. Metal sealing sleeve; 33. Sealing assembly; 331. Spring bracket; 332. Pressure bracket; 333. Embedded ring groove; 334. Anti-detachment ring; 335. Rubber sealing ring. Detailed Implementation

[0024] 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.

[0025] This specific embodiment is a valve cap with a sealing structure, the structural diagram of which is shown below. Figures 1 to 4 As shown, the device includes a cap body 1, with an installation mechanism 2 distributed around its central periphery. A double sealing mechanism 3 is fitted to the inner end of the cap body 1. The installation mechanism 2 includes multiple threaded slots 21 located around the central periphery of the cap body 1. A connecting bolt 22 is threaded into the center of each threaded slot 21, and a locking nut 23 is fitted to the end of each connecting bolt 22. The locking nut 23 and the connecting bolt 22 form a threaded connection. The connecting bolt 22 simultaneously forms a threaded connection with the cap body 1 and the valve end via the threaded slots 21. When installing the cap body 1, its inner end face can be aligned with the installation end of the valve connection end first, and then the corresponding valve end can be installed sequentially using the threaded guide of the threaded slots 21. The connecting bolts 22 pass through the cap body 1 and the valve connection end, and then the locking nut 23 is used to tightly lock the cap body 1 and the valve connection end. It is worth mentioning that during the installation process, the bolts in diagonal positions should be selected first for installation. After the two sets of connecting bolts 22 in the diagonal position have passed through the cap body 1 and the valve connection end and have been initially tightened, the above operation is repeated for two adjacent sets of screw slots 21 in a clockwise or counterclockwise direction. This ensures that the torque value meets the design requirements and that the torque difference between each bolt is within the allowable error range, so as to achieve a stable and reliable connection between the cap body 1 and the valve connection end, and effectively avoid problems such as sealing failure or component damage caused by uneven force.

[0026] The double sealing mechanism 3 includes a fixed post 31, which is fixedly installed at the middle of the inner end of the cap body 1. A metal sealing sleeve 32 is fixedly connected to the end of the fixed post 31. The inner end post size of the metal sealing sleeve 32 matches the opening size of the valve at the middle end, and the two are connected by an embedded connection. A sealing assembly 33 is assembled around and above the fixed post 31. The sealing assembly 33 includes a spring bracket 331, which is fixedly assembled at the inner end of the cap body 1. A pressure frame 332 is connected to the top of the spring bracket 331, and an embedding ring groove 33 is opened at the inner ring of the middle periphery of the pressure frame 332. 3. An anti-detachment ring 334 is fixedly provided on the inner ring above the mounting groove 333, and a rubber sealing ring 335 is embedded above the mounting groove 333. The size of the rubber sealing ring 335 is matched above the mounting groove 333. With the cooperation of the anti-detachment ring 334 and the pressure bracket 332, the mounting groove 333 can provide a pressure-resistant and anti-deviation connection for the rubber sealing ring 335. The size of the rubber sealing ring 335 is slightly larger than the peripheral ring diameter of the metal sealing sleeve 32. In the installed state, the metal sealing sleeve 32 at the end of the fixing post 31 at the inner end of the cap body 1 will be sealed and embedded in the middle of the valve, forming an initial seal on the valve end. At the same time, the spring bracket 331 installed around the fixing post 31 at the inner end of the cap body 1 continuously pushes the pressure bracket 332 using its own restoring elasticity. The rubber sealing ring 335 embedded in the annular groove 333 of the pressure bracket 332, under the action of the spring bracket 331, always tightly presses against the annular edge of the metal sealing sleeve 32. When the metal sealing sleeve 32 leaks due to microscopic defects on its surface, the rubber sealing ring 335, through elastic deformation combined with the restoring force of the spring bracket 331, promptly fills the gap, effectively preventing leakage. In addition, the spring bracket 331 also has an important long-term protection function. Even if the rubber sealing ring 335 hardens and loses elasticity due to aging in the later stages, it can still maintain the sealing effect through elastic compensation, ensuring the reliability and long-term effectiveness of the valve sealing system.

[0027] Working principle: When installing the cap body 1, first align its inner end with the installation end of the valve connection end. Then, guide the corresponding connecting bolts 22 through the threaded slots 21 to pass them through the cap body 1 and the valve connection end. Finally, use the locking nut 23 to lock the cap body 1 and the valve connection end tightly. It is worth mentioning that during the installation process, bolts in diagonal positions should be selected first. After both sets of diagonal connecting bolts 22 have passed through the cap body 1 and the valve connection end and are initially tightened, repeat the above operation by selecting two adjacent sets of threaded slots 21 in a clockwise or counterclockwise direction. This ensures that the torque value meets the design requirements and that the torque difference between each bolt is within the allowable error range, so as to achieve a stable and reliable connection between the cap body 1 and the valve connection end. This effectively avoids problems such as sealing failure or component damage caused by uneven force. Secondly, in the installed state, the metal sealing sleeve 32 at the end of the fixing post 31 at the inner end of the cap body 1 will be sealed and embedded in the middle of the valve, forming an initial seal on the valve end. Meanwhile, the spring bracket 331, installed around the fixed post 31 at the inner end of the cap body 1, continuously pushes the pressure bracket 332 using its own restoring elasticity. The rubber sealing ring 335 embedded in the annular groove 333 of the pressure bracket 332, under the action of the spring bracket 331, always tightly presses against the annular edge of the metal sealing sleeve 32. When the metal sealing sleeve 32 leaks due to microscopic surface defects, the rubber sealing ring 335, through elastic deformation combined with the restoring force of the spring bracket 331, promptly fills the gap, effectively preventing leakage. Furthermore, the spring bracket 331 also has an important long-term protection function. Even if the rubber sealing ring 335 hardens and loses elasticity due to aging in the later stages, it can still maintain the sealing effect through elastic compensation, ensuring the reliability and long-term effectiveness of the valve sealing system.

[0028] All technical features in this embodiment can be freely combined according to actual needs.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve cap with a sealing structure, comprising a cap body (1), characterized in that, The cap body (1) is provided with an installation mechanism (2) around the middle periphery, and the cap body (1) is equipped with a double sealing mechanism (3) at the inner end. The double sealing mechanism (3) includes a fixing post (31), and the fixing post (31) is fixed in the middle of the inner end of the cap body (1). The end of the fixing post (31) is fixed with a metal sealing sleeve (32), and a sealing component (33) is assembled around and above the fixing post (31).

2. A valve cap with a sealing structure according to claim 1, characterized in that, The inner end post size of the metal sealing sleeve (32) matches the opening size of the valve at the middle end, and the two are connected by an embedded connection.

3. A valve cap with a sealing structure according to claim 1, characterized in that, The sealing assembly (33) includes a spring bracket (331), which is fixedly mounted on the inner end of the cap body (1). The top of the spring bracket (331) is connected to a pressure bracket (332), and an inserting ring groove (333) is provided on the inner ring of the middle periphery of the pressure bracket (332). An anti-detachment ring (334) is fixedly provided on the upper inner ring of the inserting ring groove (333), and a rubber sealing ring (335) is embedded on the upper part of the inserting ring groove (333).

4. A valve cap with a sealing structure according to claim 3, characterized in that, The embedded ring groove (333) is equipped with a rubber sealing ring (335) with a size matching it, and the embedded ring groove (333) can provide a pressure-resistant and anti-deviation connection for the rubber sealing ring (335) with the cooperation of the anti-detachment ring (334) and the pressure frame (332).

5. A valve cap with a sealing structure according to claim 3, characterized in that, The size of the rubber sealing ring (335) is slightly larger than the peripheral ring diameter of the metal sealing sleeve (32).

6. A valve cap with a sealing structure according to claim 1, characterized in that, The installation mechanism (2) includes multiple screw slots (21), and the multiple screw slots (21) are opened in the middle periphery of the cap body (1). A connecting bolt (22) is screwed in the middle of the screw slot (21), and a locking nut (23) is sleeved on the end of the connecting bolt (22).

7. A valve cap with a sealing structure according to claim 6, characterized in that, The locking nut (23) and the connecting bolt (22) form a threaded connection, and the connecting bolt (22) uses the threaded slot (21) to form a threaded joint connection with the cap body (1) and the valve end.

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