Natural gas all-welded ball valve with high reliability
By designing a buffer chamber between the jacket and the valve body in a fully welded natural gas ball valve, the problem of natural gas valve leakage in the prior art is solved, and the safety of the medium and the use requirements of natural gas pipelines are achieved.
Patent Information
- Application Number
- CN202420764637.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The existing fully welded natural gas ball valve cannot avoid valve leakage during long-term use, resulting in natural gas medium leaking into the outside air, posing safety hazards and cannot meet the use requirements of natural gas pipelines.
A natural gas fully welded ball valve is designed including a buffer chamber between the jacket and the valve body. The buffer chamber is used to accommodate the medium leaked from the medium channel in the valve body to prevent the medium from leaking to the outside world.
Through the design of the cache cavity, the leakage of natural gas medium is effectively prevented, the safety of the medium is ensured, and the use requirements of natural gas pipelines are met.
Smart Images
Figure CN222633869U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a natural gas fully welded ball valve with high reliability. Background Art
[0002] The ball valve is a widely used valve with the main features of compact structure, high reliability, easy operation and maintenance. It is suitable for general working media such as water, solvents and natural gas, and is also suitable for media with harsh working conditions. It is suitable for use as a switch valve or cut-off valve.
[0003] When the working medium is natural gas, a fully welded ball valve is usually used. Since the fully welded ball valve is composed of a carbonized Teflon sealing ring and a coffee spring, it has a strong adaptability to changes in pressure and temperature. However, the fully welded ball valve in the prior art still has the following shortcomings: it is impossible to avoid valve leakage all the time under long-term use. If the natural gas medium leaks into the outside air for a long time, it is easy to accumulate to a certain concentration and cause harm, and it cannot meet the use requirements of the natural gas pipeline. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a natural gas fully welded ball valve with high reliability. The utility model has a protective structure for medium leakage, namely a buffer cavity between the jacket and the valve body, the buffer cavity is used to accommodate the medium leaked from the medium channel in the valve body, prevent the medium from leaking into the outside air, and meet the use requirements of the natural gas pipeline.
[0005] The technical scheme adopted by the utility model is as follows: a natural gas fully welded ball valve with high reliability, comprising a valve body, a ball, and an upper valve stem and a lower valve stem respectively installed at the upper end and the lower end of the ball, an upper valve cover for installing the upper valve stem and a lower valve cover for installing the lower valve stem are welded to the middle part of the valve body, a medium channel is provided inside the valve body, the ball is arranged in the medium channel, a flange pipe is welded at both ends of the valve body, a group of sealing components that form a seal with the ball are respectively arranged on the inner edges of the two flange pipes, the sealing components include a valve seat and a disc spring, the inner walls of the two flange pipes are respectively convex with a support ring for pressing against the corresponding group of sealing components, and also include a jacket arranged around the outer periphery of the valve body, the two ends of the jacket are respectively welded to a corresponding flange pipe, and a buffer cavity is formed between the jacket and the valve body.
[0006] A welding portion is extended at the welding point between the jacket and the flange pipeline in a direction perpendicular to the axis of the flange pipeline.
[0007] A detection component is welded on the outer wall of the jacket. The detection component includes a sleeve and a slider slidably arranged in the sleeve. An exhaust cavity connected to the outside is arranged in the sleeve. The slider controls the exhaust cavity to be connected or blocked with the buffer cavity.
[0008] The slider includes a connecting portion and a blocking portion, the outer wall of the blocking portion fits with the inner wall of the exhaust cavity, the connecting portion is located on the side of the blocking portion away from the cache cavity, and when the connecting portion is pushed to make the blocking portion slide into the cache cavity, the exhaust cavity is connected with the cache cavity.
[0009] The detection assembly also includes an elastic member, an abutment ring extends from the outer wall of one end of the connecting portion away from the cache cavity, a boss protrudes from the inner wall of one end of the sleeve close to the cache cavity, one end of the elastic member abuts against the abutment ring and the other end abuts against the boss.
[0010] An exhaust channel connected to the outside is opened at the axis of the slider, and exhaust holes connecting the exhaust cavity and the exhaust channel are evenly distributed on the side wall of the slider in the circumferential direction.
[0011] The slider is threadedly connected to a sealing plate located in the cache cavity. The diameter of the sealing plate is larger than the diameter of the exhaust cavity, and the sealing plate fits the end of the sleeve. A first sealing ring is provided at the position of the sleeve end corresponding to the sealing plate.
[0012] An end of the sleeve away from the jacket is threadedly connected to an end cover matched with the slider, and a second sealing ring is provided at a position of the end cover corresponding to the slider.
[0013] The beneficial effects of the utility model are as follows: the utility model has a protective structure against medium leakage, that is, a buffer cavity between the jacket and the valve body. The buffer cavity adopts a vacuum environment and is used to accommodate the medium leaked from the medium channel in the valve body, preventing the medium from directly leaking to the outside and contacting the air, thereby meeting the use requirements of the natural gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.
[0015] Figure 1 This is a structural schematic diagram of a natural gas fully welded ball valve with high reliability according to the utility model;
[0016] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;
[0017] Figure 3 It is a structural schematic diagram of another perspective of the utility model;
[0018] In the figure, 1-valve body, 2-ball, 3-upper valve stem, 4-lower valve stem, 5-upper valve cover, 6-lower valve cover, 7-medium channel, 8-flange pipe, 9-valve seat, 10-disc spring, 11-support ring, 12-jacket, 13-buffer chamber, 14-welding part, 15-sleeve, 16-slider, 17-exhaust chamber, 18-connecting part, 19-blocking part, 20-elastic part, 21-abutment ring, 22-boss, 23-exhaust channel, 24-exhaust hole, 25-sealing plate, 26-first sealing ring, 27-end cover, 28-second sealing ring. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.
[0020] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.
[0021] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.
[0022] like Figures 1 to 3 As shown, an embodiment of the utility model is a natural gas fully welded ball valve with high reliability, comprising a valve body 1, a ball 2, and an upper valve stem 3 and a lower valve stem 4 respectively mounted on the upper end and the lower end of the ball 2, an upper valve cover 5 for mounting the upper valve stem 3 and a lower valve cover 6 for mounting the lower valve stem 4 are welded to the middle part of the valve body 1, a medium channel 7 is arranged inside the valve body 1, the ball 2 is arranged in the medium channel 7, a flange pipe 8 is welded at both ends of the valve body 1, a group of sealing components forming a sealing match with the ball 2 are respectively arranged on the inner edges of the two flange pipes 8, the sealing components include a valve seat 9 and a disc spring 10, the inner walls of the two flange pipes 8 are respectively convex with a support ring 11 for pressing against the corresponding group of sealing components, and also include a jacket 12 arranged around the outer periphery of the valve body 1, the two ends of the jacket 12 are respectively welded to a corresponding flange pipe 8, and a buffer cavity 13 is formed between the jacket 12 and the valve body 1.
[0023] The beneficial effects of such a configuration are as follows: the utility model has a protective structure against medium leakage, namely, a buffer cavity between the jacket and the valve body; the buffer cavity adopts a vacuum environment and is used to accommodate medium leaked from the medium channel in the valve body, thereby preventing the medium from directly leaking to the outside and contacting the air, thereby meeting the use requirements of natural gas pipelines.
[0024] It is further provided that a welding portion 14 is extended along a direction perpendicular to the axis of the flange pipe 8 at a welding point between the jacket 12 and the flange pipe 8 .
[0025] The beneficial effects of such arrangement are as follows: the extended welding portion can increase the welding area between the jacket and the flange pipe, and the force is evenly distributed, and the structure is stable and reliable.
[0026] It is further configured that a detection component is welded to the outer wall of the jacket 12, and the detection component includes a sleeve 15 and a slider 16 slidably arranged in the sleeve 15, and an exhaust chamber 17 connected to the outside is provided in the sleeve 15, and the slider 16 controls the exhaust chamber 17 to be connected or blocked with the cache chamber 13.
[0027] The beneficial effects of this arrangement are as follows: the on-off controllable detection component is used to quickly connect to the gas detection device to detect whether there is natural gas leakage into the cache chamber, and to promptly discover the cause and situation of the leakage. The detection component can also connect to the exhaust device to discharge the natural gas in the cache chamber, thereby ensuring the safe use of the fully welded ball valve.
[0028] It is further configured that the slider 16 includes a connecting portion 18 and a blocking portion 19, the outer wall of the blocking portion 19 is in contact with the inner wall of the exhaust chamber 17, and the connecting portion 18 is located on the side of the blocking portion 19 away from the cache chamber 13. When the connecting portion 18 is pushed to make the blocking portion 19 slide into the cache chamber 13, the exhaust chamber 17 is connected to the cache chamber 13.
[0029] The beneficial effect of such arrangement is as follows: by pressing the connection portion to push the blocking portion that seals with the exhaust cavity into the cache cavity, the exhaust cavity and the cache cavity can be connected, which has the advantages of delicate structure and convenient and reliable docking.
[0030] It is further configured that the detection component also includes an elastic member 20, an abutment ring 21 extends from the outer wall of one end of the connecting portion 18 away from the cache cavity 13, and a boss 22 protrudes from the inner wall of one end of the sleeve 15 close to the cache cavity 13, one end of the elastic member 20 abuts against the abutment ring 21 and the other end abuts against the boss 22.
[0031] The beneficial effects of such a configuration are as follows: the slider can be quickly reset after being pressed by the pre-tightened elastic member, and the blocking portion is kept in a position to seal with the exhaust chamber when the slider is not in contact, thereby preventing leakage.
[0032] It is further provided that an exhaust passage 23 communicating with the outside is opened at the axis of the slider 16 , and exhaust holes 24 communicating with the exhaust cavity 17 and the exhaust passage 23 are evenly distributed on the side wall of the slider 16 circumferentially.
[0033] The beneficial effects of such a setting are as follows: the exhaust hole helps the natural gas to circulate, the exhaust channel facilitates the natural gas to flow out from one channel, and the detection device and the exhaust device are easily connected, which has the advantages of safe and reliable structure.
[0034] It is further configured that the slider 16 is threadedly connected to a sealing plate 25 located in the cache cavity 13, the diameter of the sealing plate 25 is larger than the diameter of the exhaust cavity 17, and the sealing plate 25 fits with the end of the sleeve 15, and a first sealing ring 26 is provided at the position of the sealing plate 25 at the end of the sleeve 15.
[0035] The beneficial effect of such a configuration is as follows: the sealing performance of the slider is further increased by the sealing plate and the first sealing ring, thereby preventing the natural gas in the cache cavity from leaking into the exhaust cavity.
[0036] It is further provided that one end of the sleeve 15 away from the jacket 12 is threadedly connected to an end cover 27 that cooperates with the slider 16 , and a second sealing ring 28 is provided at a position of the end cover 27 corresponding to the slider 16 .
[0037] The beneficial effects of such an arrangement are as follows: the end cover connected by threads facilitates the disassembly and maintenance of the internal components of the detection assembly, and the second sealing ring improves the sealing between the end cover and the slider.
[0038] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. A natural gas fully welded ball valve with high reliability, comprising a valve body (1), a ball (2), and an upper valve stem (3) and a lower valve stem (4) respectively mounted on the upper end and the lower end of the ball (2), wherein an upper valve cover (5) for mounting the upper valve stem (3) and a lower valve cover (6) for mounting the lower valve stem (4) are welded to the middle of the valve body (1), a medium channel (7) is provided inside the valve body (1), the ball (2) is arranged in the medium channel (7), a flange pipe (8) is welded to each of the two ends of the valve body (1), a group of sealing components forming a sealing fit with the ball (2) are respectively arranged on the inner edges of the two flange pipes (8), the sealing components comprising a valve seat (9) and a disc spring (10), and a support ring (11) for pressing against a corresponding group of sealing components is respectively protruded from the inner walls of the two flange pipes (8), wherein the support ring (11) is used to press against a corresponding group of sealing components, and the valve body (1) is characterized in that: It also includes a jacket (12) arranged around the outer periphery of the valve body (1), with two ends of the jacket (12) respectively welded to a corresponding flange pipe (8), and a buffer cavity (13) is formed between the jacket (12) and the valve body (1).
2. According to claim 1, a natural gas fully welded ball valve with high reliability is characterized by: A welding portion (14) extends from the welding point between the jacket (12) and the flange pipe (8) in a direction perpendicular to the axis of the flange pipe (8).
3. According to claim 1, a natural gas fully welded ball valve with high reliability is characterized in that: A detection assembly is welded to the outer wall of the jacket (12), the detection assembly comprising a sleeve (15) and a slider (16) slidably arranged in the sleeve (15), an exhaust cavity (17) communicating with the outside is arranged in the sleeve (15), and the slider (16) controls the exhaust cavity (17) to communicate with or block the buffer cavity (13).
4. A natural gas fully welded ball valve with high reliability according to claim 3, characterized in that: The slider (16) comprises a connecting portion (18) and a blocking portion (19); the outer wall of the blocking portion (19) is in contact with the inner wall of the exhaust cavity (17); the connecting portion (18) is located on a side of the blocking portion (19) away from the buffer cavity (13); when the connecting portion (18) is pushed to slide the blocking portion (19) into the buffer cavity (13), the exhaust cavity (17) is communicated with the buffer cavity (13).
5. A natural gas fully welded ball valve with high reliability according to claim 4, characterized in that: The detection assembly further comprises an elastic member (20); an abutment ring (21) extends from the outer wall of one end of the connection portion (18) away from the buffer cavity (13); a boss (22) protrudes from the inner wall of one end of the sleeve (15) close to the buffer cavity (13); one end of the elastic member (20) abuts against the abutment ring (21) and the other end abuts against the boss (22).
6. A natural gas fully welded ball valve with high reliability according to claim 3, characterized in that: An exhaust passage (23) communicating with the outside is provided at the axis of the slider (16), and exhaust holes (24) communicating with the exhaust cavity (17) and the exhaust passage (23) are evenly distributed in the circumferential direction on the side wall of the slider (16).
7. A natural gas fully welded ball valve with high reliability according to claim 3, characterized in that: The slider (16) is threadedly connected to a sealing plate (25) located in the cache cavity (13); the diameter of the sealing plate (25) is larger than the diameter of the exhaust cavity (17); the sealing plate (25) fits the end of the sleeve (15); and a first sealing ring (26) is provided at the end of the sleeve (15) corresponding to the position of the sealing plate (25).
8. The natural gas fully welded ball valve with high reliability according to claim 3 is characterized by: An end of the sleeve (15) away from the jacket (12) is threadedly connected to an end cover (27) that cooperates with the slider (16), and a second sealing ring (28) is provided at a position of the end cover (27) corresponding to the slider (16).