Self-closing structure of gas valve

Abstract

The utility model belongs to the technical field of gas valves, and particularly relates to a self-closing structure of a gas valve, which comprises a valve body, a first support, a first sliding rod and a first elastic piece, the valve body comprises a gas inlet end and a gas outlet end, a valve core is mounted in the valve body, a vent hole is formed in the valve core, and a first counter bore is formed in the inner wall of the vent hole; the first support is installed in the first counter bore and provided with a first sliding hole. The first sliding rod is slidably connected into the first sliding hole, and one end is provided with a first sealing disc. The first elastic piece is installed on one side of the first support and used for resisting the first sealing disc to get close to the axial inner wall of the first counter bore. When the acting force brought by high pressure in the gas valve is larger than the anti-deformation acting force of the first elastic piece, the first sealing disc abuts against the axial inner wall of the first counter bore, and the vent hole is blocked. A self-closing valve is not additionally arranged, so that the increase of mounting accessories is avoided, the input cost is reduced, excessive connecting points are prevented, the leakage risk is reduced, and the safety performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas valves, and in particular relates to a self-closing structure of a gas valve. Background Art

[0002] Gas valves are used to cut off, connect and regulate gas in pipelines, and have good control characteristics and closing and sealing performance. They are suitable for various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, oxygen, etc., and are key equipment to ensure the safety of gas use.

[0003] When using traditional gas valves, if the pressure in the pipeline is too high, it is usually necessary to control the closure by adding an external self-closing valve. This not only increases the number of installation accessories and increases the investment cost, but also leads to too many connection points in the pipeline, which undoubtedly increases the risk of leakage and poses a safety hazard, which needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned technical problems and provide a self-closing structure for a gas valve, so that the gas valve has a self-closing effect and can cut off the gas supply when the pressure is too high without the need for an additional self-closing valve.

[0005] In view of this, the present invention provides a self-closing structure of a gas valve, comprising:

[0006] The valve body includes an air inlet end and an air outlet end, and a valve core is installed inside. A vent hole is opened in the valve core, and a first countersunk hole is axially opened on the inner wall of the vent hole near the air inlet end;

[0007] The first bracket is installed in the first countersunk hole, and a first sliding hole is axially opened at the axis center;

[0008] A first sliding rod is slidably connected to the first sliding hole, and a first sealing disk is provided at one end away from the first bracket;

[0009] A first elastic member is mounted on a side of the first bracket away from the first sealing disk and is used to prevent the first sealing disk from approaching the inner wall of the first counterbore in an axial direction;

[0010] When the force caused by the high pressure in the gas valve is greater than the anti-deformation force of the first elastic member, the first sealing disk abuts against the axial inner wall of the first counterbore and blocks the vent hole.

[0011] In the above technical solution, further:

[0012] A first annular groove is formed on the inner wall of the first countersunk hole, and a first clamping spring is installed in the first annular groove and is used to fix the first bracket in the first countersunk hole.

[0013] In the above technical solution, further:

[0014] A second countersunk hole is axially opened on one side of the inner wall of the first sliding hole close to the air inlet end;

[0015] Wherein, the first elastic member is installed in the second countersunk hole.

[0016] In the above technical solution, further, the first elastic member includes:

[0017] a spring, sleeved on the first slide rod, with one end abutting against the axial inner wall of the second countersunk hole;

[0018] The second clamping spring is clamped on one end of the first sliding rod away from the first sealing disk and abuts against the other end of the spring.

[0019] In the above technical solution, further:

[0020] A stepped hole is formed on the inner wall of the valve body on the air inlet side, and the stepped hole includes a first step and a second step in sequence along the axial direction close to the air inlet side;

[0021] Among them, also include:

[0022] The second bracket is mounted on the second step and has a second sliding hole axially opened at the axis center;

[0023] A second sliding rod is slidably connected to the first sliding hole, and a second sealing disk is provided at one end away from the second bracket;

[0024] a clamping block, which is sleeved on one end of the second slide bar and is used to limit the movement of the second slide bar and will melt at high temperature to release the restriction on the second slide bar;

[0025] The second elastic member is installed on a side of the first bracket close to the first sealing disk, and can push the second sealing disk and the first step to form a seal after the clamping block releases the restriction on the second sliding rod.

[0026] In the above technical solution, further:

[0027] A second annular groove is provided on the inner wall of the second step, and a third clamping spring is installed in the second annular groove and is used to fix the second bracket in the second step.

[0028] In the above technical solution, further:

[0029] The surface of the second sliding rod is provided with an external thread, and is connected to the clamping block by using a thread.

[0030] The beneficial effects of the utility model are:

[0031] 1. By arranging a first sealing disk and a first countersunk hole at the valve core of the gas valve, and using a first elastic member to resist the movement of the first sealing disk, when the pressure in the pipeline increases and exceeds the deformation resistance of the first elastic member, the first sealing disk will be pushed to abut against the axial inner wall of the first countersunk hole, thereby sealing the vent hole. That is, there is no need to additionally install a self-closing valve, which effectively avoids the increase in installation accessories, reduces investment costs, prevents excessive connection points in the pipeline, reduces the risk of leakage, and improves safety performance.

[0032] 2. The arrangement of the first bracket and the first sliding rod can effectively improve the stability of the first sealing disk during axial movement, thereby ensuring the sealing effect of the vent hole.

[0033] 3. The first bracket is fixed by the first retaining spring, and the spring is fixed by the second retaining spring, so that the entire mechanism is independent and is only connected to the valve core and is not released from the valve body, thereby effectively improving the convenience of installing the self-closing structure.

[0034] 4. Through the setting of the second sealing disk and the second sliding rod, after the block is melted at high temperature, the restriction on the second sliding rod will be released, and then the elastic potential energy of the second elastic member will be released, thereby promoting the formation of a seal between the second sealing disk and the first step, thereby sealing the pipeline and further improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the utility model;

[0036] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0037] Figure 3 This utility model Figure 1 Enlarged view of point B in the middle;

[0038] Figure 4 This is an exploded view of the valve core of the utility model;

[0039] Figure 5 This is an exploded view of the second bracket of the present invention;

[0040] The markings in the figure are as follows: 1. valve body; 2. air inlet end; 3. air outlet end; 4. valve core; 5. air vent; 6. first countersunk hole; 7. first bracket; 8. first sliding hole; 9. first slide rod; 10. first sealing disk; 11. first elastic member; 110. spring; 111. second retaining spring; 12. first annular groove; 13. first retaining spring; 14. second countersunk hole; 15. first step; 16. second step; 17. second bracket; 18. second sliding hole; 19. second slide rod; 20. second sealing disk; 21. block; 22. second elastic member; 23. second annular groove; 24. third retaining spring; 25. annular groove. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0042] Example 1:

[0043] This embodiment provides a self-closing structure of a gas valve, including:

[0044] The valve body 1 includes an air inlet end 2 and an air outlet end 3, and a valve core 4 is installed inside. A vent hole 5 is opened in the valve core 4, and a first countersunk hole 6 is axially opened on the inner wall of the vent hole 5 near the air inlet end 2;

[0045] The first bracket 7 is installed in the first countersunk hole 6, and a first sliding hole 8 is axially opened at the axis center;

[0046] A first sliding rod 9 is slidably connected to the first sliding hole 8, and a first sealing disk 10 is provided at the end away from the first bracket 7;

[0047] The first elastic member 11 is mounted on a side of the first bracket 7 away from the first sealing disc 10 and is used to prevent the first sealing disc 10 from approaching the inner wall of the first counterbore 6 in the axial direction;

[0048] When the force caused by the high pressure in the gas valve is greater than the anti-deformation force of the first elastic member 11, the first sealing disc 10 abuts against the axial inner wall of the first counterbore 6 and blocks the vent hole 5;

[0049] At the same time, the first elastic member 11 can be a spring 110, and a rubber pad is provided on the side of the first sealing disk 10 close to the axial inner wall of the first countersunk hole 6, and an air gap is formed between the radial surface of the first sealing disk 10 and the radial inner wall of the first countersunk hole 6;

[0050] Furthermore, an annular groove 25 communicating with the interior of the first counterbore 6 is formed on the axial inner wall of the first counterbore 6, and the annular groove 25 is arranged corresponding to the axial surface of the first sealing disk 10, thereby reducing the contact area between the first seal and the axial inner wall of the first counterbore 6, increasing the pressure, enhancing the abutment effect, and ensuring the sealing performance;

[0051] At the same time, the pressure is increased, which can correspondingly increase the elastic reset force of the first elastic member 11, so that when the pressure at the air outlet end 3 decreases due to some reasons (leakage, etc.), the first sealing disk 10 can be better opened to ensure the reset of the first sealing disk 10.

[0052] It can be seen from this embodiment that by providing the first sealing disc 10 and the first countersunk hole 6 at the valve core 4 of the gas valve, and by using the first elastic member 11 to resist the movement of the first sealing disc 10, when the pressure in the pipeline increases and exceeds the deformation resistance of the first elastic member 11, the first sealing disc 10 is pushed to abut against the axial inner wall of the first countersunk hole 6, thereby sealing the vent hole 5. That is, there is no need to additionally provide a self-closing valve, which effectively avoids the increase in installation accessories, reduces investment costs, prevents excessive connection points in the pipeline, reduces the risk of leakage, and improves safety performance;

[0053] At the same time, the arrangement of the first bracket 7 and the first sliding rod 9 can effectively improve the stability of the first sealing disk 10 during axial movement, thereby ensuring the sealing effect on the vent hole 5 .

[0054] Example 2:

[0055] This embodiment provides a self-closing structure for a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0056] A first annular groove 12 is defined on the inner wall of the first countersunk hole 6 , and a first retaining spring 13 is installed in the first annular groove 12 for fixing the first bracket 7 in the first countersunk hole 6 .

[0057] It can be seen from this embodiment that the provision of the first retaining spring 13 facilitates the fixation of the first bracket 7 and the detachable installation of the first bracket 7, thereby ensuring the convenience of disassembly and assembly of the first bracket 7.

[0058] Example 3:

[0059] This embodiment provides a self-closing structure for a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0060] A second countersunk hole 14 is axially opened on one side of the inner wall of the first sliding hole 8 close to the air inlet end 2;

[0061] The first elastic member 11 is installed in the second countersunk hole 14 .

[0062] It can be seen from this embodiment that by opening a second countersunk hole 14 and installing the first elastic member 11 in the second countersunk hole 14, the first elastic member 11 can be installed in an embedded manner to ensure the stability of the first elastic member 11 during deformation, ensure its axial deformation, and suppress its radial bending.

[0063] Example 4:

[0064] This embodiment provides a self-closing structure of a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features: the first elastic member 11 includes:

[0065] The spring 110 is sleeved on the first slide rod 9, and one end thereof abuts against the axial inner wall of the second counterbore 14;

[0066] The second clamping spring 111 is clamped on one end of the first sliding rod 9 away from the first sealing disk 10 and abuts against the other end of the spring 110 .

[0067] It can be seen from this embodiment that by using the spring 110 as the elastic potential energy of the first elastic member 11, it can be mounted on the first slide rod 9 to improve the uniformity of the force, and the second retaining spring 111 is provided to improve the convenience of disassembly and assembly of the spring 110.

[0068] Example 5:

[0069] This embodiment provides a self-closing structure for a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0070] A stepped hole is formed on the inner wall of the valve body 1 on the side of the air inlet end 2, and the stepped hole includes a first step 15 and a second step 16 in sequence along the axial direction close to the air inlet end 2;

[0071] Among them, also include:

[0072] The second bracket 17 is mounted on the second step 16 and has a second sliding hole 18 axially opened at the axis;

[0073] The second sliding rod 19 is slidably connected to the first sliding hole 8, and a second sealing disk 20 is provided at the end away from the second bracket 17;

[0074] The clamping block 21 is sleeved on one end of the second slide bar 19 and is used to limit the movement of the second slide bar 19. The clamping block 21 will melt at high temperature to release the restriction on the second slide bar 19.

[0075] The second elastic member 22 is installed on the side of the first bracket 7 close to the first sealing disk 10, and after the clamping block 21 releases the restriction on the second sliding rod 19, it can push the second sealing disk 20 to form a seal with the first step 15;

[0076] The clamping block 21 may be made of plastic.

[0077] It can be seen from this embodiment that through the setting of the second sealing disk 20 and the second slide rod 19, after the block 21 is melted at high temperature, the restriction on the second slide rod 19 will be released, and then the elastic potential energy of the second elastic member 22 will be released, thereby pushing the second sealing disk 20 and the first step 15 to form a seal, thereby sealing the pipeline and further improving the safety performance.

[0078] Example 6:

[0079] This embodiment provides a self-closing structure for a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0080] A second annular groove 23 is defined on the inner wall of the second step 16 , and a third clamping spring 24 is installed in the second annular groove 23 for fixing the second bracket 17 in the second step 16 .

[0081] It can be seen from this embodiment that the third retaining spring 24 is adopted to facilitate the fixation of the second bracket 17 and the detachable installation of the second bracket 17, thereby ensuring the convenience of disassembly and assembly of the second bracket 17.

[0082] Example 7:

[0083] This embodiment provides a self-closing structure for a gas valve. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0084] The second slide rod 19 has an external thread on its surface and is connected to the clamping block 21 by a thread.

[0085] It can be seen from this embodiment that by adopting a threaded connection between the clamping block 21 and the second slide rod 19, the convenience of assembling the two can be improved, and the threaded connection can enable the clamping block 21 to release the restriction on the second slide rod 19 more quickly. Specifically, when the internal thread on the clamping block 21 that engages with the surface of the second slide rod 19 is softened or even melted due to high temperature, the restriction on the second slide rod 19 can be released under the action of the second elastic member 22.

[0086] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A self-closing structure of a gas valve, characterized in that: include: The valve body (1) includes an air inlet end (2) and an air outlet end (3), and a valve core (4) is installed inside. A vent hole (5) is provided in the valve core (4), and a first countersunk hole (6) is axially provided on a side of the inner wall of the vent hole (5) close to the air inlet end (2); A first bracket (7) is installed in the first countersunk hole (6), and a first sliding hole (8) is axially opened at the axis center; A first sliding rod (9) is slidably connected in the first sliding hole (8), and a first sealing disk (10) is provided at one end away from the first bracket (7); A first elastic member (11) is mounted on a side of the first bracket (7) away from the first sealing disc (10) and is used to prevent the first sealing disc (10) from approaching the inner wall of the first counterbore (6) in an axial direction; When the force caused by the high pressure in the gas valve is greater than the anti-deformation force of the first elastic member (11), the first sealing disc (10) abuts against the axial inner wall of the first counterbore (6) and blocks the vent hole (5).

2. The self-closing structure of the gas valve according to claim 1, characterized in that: A first annular groove (12) is provided on the inner wall of the first countersunk hole (6), and a first retaining spring (13) is installed in the first annular groove (12) and is used to fix the first bracket (7) in the first countersunk hole (6).

3. The self-closing structure of the gas valve according to claim 1, characterized in that: A second countersunk hole (14) is axially provided on one side of the inner wall of the first sliding hole (8) close to the air inlet end (2); Wherein, the first elastic member (11) is installed in the second countersunk hole (14).

4. The self-closing structure of the gas valve according to claim 3, characterized in that: The first elastic member (11) comprises: A spring (110) is sleeved on the first slide bar (9), and one end of the spring abuts against the axial inner wall of the second countersunk hole (14); The second clamping spring (111) is clamped on one end of the first slide rod (9) away from the first sealing disk (10) and abuts against the other end of the spring (110).

5. The self-closing structure of the gas valve according to claim 1, characterized in that: The inner wall of the valve body (1) on the side of the air inlet end (2) is provided with a stepped hole, and the stepped hole includes a first step (15) and a second step (16) in sequence along the axial direction on the side close to the air inlet end (2); Among them, also include: A second bracket (17) is mounted on the second step (16) and has a second sliding hole (18) axially opened at the axis; A second sliding rod (19) is slidably connected in the first sliding hole (8), and a second sealing disk (20) is provided at one end away from the second bracket (17); A clamping block (21) is sleeved on one end of the second slide bar (19) and is used to limit the movement of the second slide bar (19), and melts at a high temperature to release the restriction on the second slide bar (19); The second elastic member (22) is mounted on a side of the first bracket (7) close to the first sealing disc (10) and is capable of pushing the second sealing disc (20) and the first step (15) to form a seal after the clamping block (21) releases the restriction on the second slide bar (19).

6. The self-closing structure of the gas valve according to claim 5, characterized in that: A second annular groove (23) is provided on the inner wall of the second step (16), and a third clamping spring (24) is installed in the second annular groove (23) and is used to fix the second bracket (17) in the second step (16).

7. The self-closing structure of the gas valve according to claim 5, characterized in that: The surface of the second slide bar (19) is provided with an external thread, and is connected to the clamping block (21) by a thread.

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