Anti-backfire safety ball valve
The design of the limit assembly and sealing assembly solves the problem of natural gas leakage caused by loose threaded connection of the anti-backfire ball valve, achieves stable connection and tight sealing, extends service life and reduces maintenance costs.
Patent Information
- Application Number
- CN202422206364.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The threaded connection of the existing anti-backfire ball valve is prone to loosening after long-term use, resulting in natural gas leakage, unstable connection, and increased maintenance costs.
The design adopts the limit assembly and sealing assembly, including the limit block, movable column, fixed frame, sealing ring, etc. The limit rod and spring are used to prevent the threaded connection from loosening, and the multi-layer sealing ring provides a tight sealing effect.
Effectively prevent natural gas leakage, improve the stability and reliability of ball valve components, extend service life and reduce maintenance costs.
Smart Images
Figure CN223331177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of natural gas pipelines, in particular to an anti-backfire safety ball valve. Background Art
[0002] Natural gas, because it contains no carbon monoxide, is lighter than air, and is less likely to accumulate and form explosive gases, is safer than other fuels. Therefore, it has become increasingly used in people's daily lives. my country is a vast country, and environmental factors and gas production levels vary from region to region, leading to frequent variations in gas composition and pressure. When the pipeline pressure in a gas stove is lower than the external atmospheric pressure, the flame retracts into the burner and burns within the burner pipeline. This can cause pipeline noise and shortened flames, affecting normal combustion. In more serious cases, it can damage the gas pipeline and even cause an explosion. Therefore, flashback significantly impacts natural gas usage, and therefore, anti-backfire ball valves are commonly installed in natural gas pipelines.
[0003] When installing, the existing anti-backfire ball valve is usually directly connected to the natural gas pipeline using threads. However, after long-term use, the existing threaded connection is prone to loosening, resulting in an unstable connection between the ball valve and the pipeline, which in turn causes natural gas leakage. Utility Model Content
[0004] The purpose of the utility model is to solve the problem in the prior art that the threaded connection is prone to loosening after long-term use, resulting in an unstable connection between the ball valve and the pipeline, which in turn causes natural gas leakage, and to propose a backfire-proof safety ball valve.
[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a backfire prevention safety ball valve, comprising a ball valve assembly, a limit assembly is provided at one end of the ball valve assembly, a sealing assembly is provided at the other end of the ball valve assembly, the ball valve assembly comprises a ball valve body, a connecting piece is installed on the side of the ball valve body, the limit assembly comprises a natural gas pipeline, the natural gas pipeline is connected to the internal thread of the connecting piece, a guide ring is installed on the outside of the natural gas pipeline, a movable column is installed inside the guide ring, a fixed frame is installed on the top of the movable column, a limit block is installed inside the fixed frame, a limit piece is installed on the top of the connecting piece, and the limit block is installed inside the limit piece.
[0006] Preferably, the sealing assembly includes a first sealing ring, a sealing inner ring is installed on the side of the ball valve body, and a second sealing ring is installed on the inner side of the sealing inner ring.
[0007] Preferably, a plurality of limiting grooves are provided inside the guide ring, and a limiting rod passes through the interior of a single limiting groove.
[0008] Preferably, a spring is installed on the inner side of the limiting member, a pull rod is installed inside the spring, and one end of the pull rod is installed on the top of the limiting block.
[0009] Preferably, a sealing outer ring is installed on the outer side of the sealing inner ring, and a third sealing ring is installed on the inner side of the sealing outer ring.
[0010] Preferably, a wrench is installed on the top of the ball valve body.
[0011] Compared with the prior art, the advantages and positive effects of the present invention are:
[0012] 1. In the present invention, the movable column slides inside the guide ring so that the fixed frame moves to the top of the natural gas pipeline, and then the limit rod is used to limit the fixed frame to ensure the stability of the fixed frame. The movable limit block moves inside the fixed frame so that the limit block is installed inside the limit piece, which effectively avoids the loosening of the threaded connection and prevents the occurrence of natural gas leakage, thereby ensuring the stability and reliability of the installation of the ball valve assembly, reducing the increase in maintenance costs due to unstable connection, and extending the service life of the ball valve assembly.
[0013] 2. In the present invention, the first sealing ring is installed on the surface of the ball valve body, which is conducive to providing effective sealing. The sealing inner ring is installed on the side of the ball valve body, and the sealing outer ring is installed on the outside of the sealing inner ring, and cooperates with the second sealing ring and the third sealing ring, which is conducive to further providing effective sealing for the installation of the ball valve assembly, avoiding natural gas leakage, ensuring a tight seal at the connection between the ball valve assembly and the pipeline, and preventing impurities and water vapor from entering the interior of the ball valve assembly, reducing corrosion to the ball valve assembly, reducing maintenance and repair costs, and thus increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model provides a three-dimensional structural diagram of an anti-backfire safety ball valve;
[0015] Figure 2 This is another perspective structural diagram of an anti-backfire safety ball valve proposed by the utility model;
[0016] Figure 3 The utility model provides a schematic structural diagram of a limit assembly of an anti-backfire safety ball valve;
[0017] Figure 4 This is a schematic diagram of the exploded structure of part of the limit assembly of a backfire prevention safety ball valve proposed in the utility model;
[0018] Figure 5 The utility model provides a schematic diagram of the exploded structure of a sealing component of an anti-backfire safety ball valve.
[0019] Legend: 1. Ball valve assembly; 101. Ball valve body; 102. Wrench; 103. Connector; 2. Limit assembly; 201. Natural gas pipeline; 202. Guide ring; 203. Moving column; 204. Fixed bracket; 205. Limit block; 206. Limit rod; 207. Limit member; 208. Pull rod; 209. Spring; 3. Sealing assembly; 301. First sealing ring; 302. Sealing inner ring; 303. Second sealing ring; 304. Sealing outer ring; 305. Third sealing ring. DETAILED DESCRIPTION
[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.
[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0022] Example 1: Figure 1-Figure 5 As shown, the utility model provides a technical solution: a backfire prevention safety ball valve, including a ball valve assembly 1, a limit assembly 2 is provided at one end of the ball valve assembly 1, a sealing assembly 3 is provided at the other end of the ball valve assembly 1, the ball valve assembly 1 includes a ball valve body 101, a connector 103 is installed on the side of the ball valve body 101, the limit assembly 2 includes a natural gas pipeline 201, the natural gas pipeline 201 is connected to the internal thread of the connector 103, a guide ring 202 is installed on the outside of the natural gas pipeline 201, and the guide ring 202 is installed inside. There is a movable column 203, a fixed frame 204 is installed on the top of the movable column 203, a limiting block 205 is installed inside the fixed frame 204, a limiting member 207 is installed on the top of the connecting member 103, the limiting block 205 is installed inside the limiting member 207, a plurality of limiting grooves are opened inside the guide ring 202, and a limiting rod 206 passes through the inside of a single limiting groove, a spring 209 is installed on the inner side of the limiting member 207, a pull rod 208 is installed inside the spring 209, and one end of the pull rod 208 is installed on the top of the limiting block 205.
[0023] In this embodiment, when the ball valve assembly 1 is installed, it is threadedly connected to the connector 103 through the natural gas pipeline 201, and then the movable column 203 is moved to slide inside the guide ring 202, so that the fixing frame 204 moves to the top of the natural gas pipeline 201, and then the limiting rod 206 is used to limit the fixing frame 204 to ensure the stability of the fixing frame 204, and the limiting block 205 is moved to move inside the fixing frame 204, so that the limiting block 205 is installed inside the limiting member 207, which is conducive to avoiding loosening of the threaded connection and preventing natural gas leakage, ensuring the stability and reliability of the installation of the ball valve assembly 1, while reducing the increase in maintenance costs due to unstable connection and extending the service life of the ball valve assembly 1, by pulling the pull rod 208 upward, the spring 209 is compressed, and then the hand is released to allow the spring 209 to extend and drive the pull rod 208 to descend, prompting the pull rod 208 to limit the limiting block 205, further avoiding the occurrence of thread loosening.
[0024] Example 2: Figure 1-Figure 5 As shown, the sealing assembly 3 includes a first sealing ring 301, a sealing inner ring 302 is installed on the side of the ball valve body 101, a second sealing ring 303 is installed on the inner side of the sealing inner ring 302, a sealing outer ring 304 is installed on the outer side of the sealing inner ring 302, a third sealing ring 305 is installed on the inner side of the sealing outer ring 304, and a wrench 102 is installed on the top of the ball valve body 101.
[0025] In this embodiment, the first sealing ring 301 is installed on the surface of the ball valve body 101, which is conducive to providing an effective sealing effect. The sealing inner ring 302 is installed on the side of the ball valve body 101, and the sealing outer ring 304 is installed on the outside of the sealing inner ring 302, and cooperates with the second sealing ring 303 and the third sealing ring 305, which is conducive to further providing an effective sealing effect for the installation of the ball valve assembly 1, avoiding leakage of natural gas, ensuring a tight seal at the connection between the ball valve assembly 1 and the pipeline, and preventing impurities and water vapor from entering the interior of the ball valve assembly 1, reducing corrosion to the ball valve assembly 1, reducing maintenance and repair costs, and thus improving service life.
[0026] The working principle of this embodiment is as follows: when using, first, when installing the ball valve assembly 1, the natural gas pipeline 201 is connected to the connector 103 by thread, and then the movable column 203 is moved to slide inside the guide ring 202, so that the fixed frame 204 is moved to the top of the natural gas pipeline 201, and then the limiting rod 206 is used to limit the fixed frame 204 to ensure the stability of the fixed frame 204, and the movable limiting block 205 is moved inside the fixed frame 204 so that the limiting block 205 is installed inside the limiting member 207, which is conducive to preventing the threaded connection from loosening. Then pull the pull rod 208 upward to compress the spring 209, and then release your hand to extend the spring 209 and drive the pull rod 208 down, so that the pull rod 208 limits the limit block 205. The first sealing ring 301 is installed on the surface of the ball valve body 101, which is conducive to providing effective sealing. The sealing inner ring 302 is installed on the side of the ball valve body 101, and the sealing outer ring 304 is installed on the outside of the sealing inner ring 302, and cooperates with the second sealing ring 303 and the third sealing ring 305, which is conducive to further providing effective sealing for the installation of the ball valve assembly 1.
[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A backfire prevention safety ball valve, comprising a ball valve assembly (1), characterized in that: A limiting assembly (2) is provided at one end of the ball valve assembly (1), and a sealing assembly (3) is provided at the other end of the ball valve assembly (1). The ball valve assembly (1) comprises a ball valve body (101), a connecting piece (103) is installed on the side of the ball valve body (101), the limiting assembly (2) comprises a natural gas pipeline (201), the natural gas pipeline (201) is connected to the internal thread of the connecting piece (103), a guide ring (202) is installed on the outside of the natural gas pipeline (201), a movable column (203) is installed inside the guide ring (202), a fixed frame (204) is installed on the top of the movable column (203), a limiting block (205) is installed inside the fixed frame (204), a limiting piece (207) is installed on the top of the connecting piece (103), and the limiting block (205) is installed inside the limiting piece (207).
2. The anti-backfire safety ball valve according to claim 1, characterized in that: The sealing assembly (3) comprises a first sealing ring (301), a sealing inner ring (302) is installed on the side of the ball valve body (101), and a second sealing ring (303) is installed on the inner side of the sealing inner ring (302).
3. The anti-backfire safety ball valve according to claim 1, characterized in that: A plurality of limiting grooves are provided inside the guide ring (202), and a limiting rod (206) runs through the interior of each limiting groove.
4. The anti-backfire safety ball valve according to claim 1, characterized in that: A spring (209) is installed on the inner side of the limiting member (207), a pull rod (208) is installed inside the spring (209), and one end of the pull rod (208) is installed on the top of the limiting block (205).
5. The anti-backfire safety ball valve according to claim 2, characterized in that: A sealing outer ring (304) is installed on the outer side of the sealing inner ring (302), and a third sealing ring (305) is installed on the inner side of the sealing outer ring (304).
6. The anti-backfire safety ball valve according to claim 1, characterized in that: A wrench (102) is installed on the top of the ball valve body (101).