Quickly-mounted gas self-closing valve

Abstract

The utility model relates to the technical field of valves, in particular to a quickly-mounted gas self-closing valve which comprises a valve body, connecting mechanisms are arranged at the two ends of the valve body, and the valve body is connected with a gas pipeline through the connecting mechanisms. The valve body is moved to drive the second connecting outer pipe to move, so that the end part of the first connecting outer pipe abuts against the end part of the second connecting outer pipe, and after the first connecting outer pipe abuts against the second connecting outer pipe, the buckling block is clamped with the buckling groove under the action of the connecting buckling plate; and the ventilation assembly conducts ventilation on the interiors of the first connecting outer pipe and the second connecting outer pipe, so that the connection work between the valve body and the gas pipeline is completed, the structure is simple, only the first connecting outer pipe and the second connecting outer pipe need to be moved to enable the buckling blocks on the connecting buckling plates to buckle the buckling grooves, convenience and rapidness are achieved, the installation efficiency is high, and the application range is wide.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a gas self-closing valve for quick installation. Background Art

[0002] The self-closing valve, fully known as the pipeline gas self-closing valve, is a safety device installed on the low-pressure gas system pipeline. It can automatically close the valve and cut off the gas source without electricity or other external power when the gas supply pressure in the pipeline shows underpressure, overpressure or abnormal flow, so as to prevent safety accidents caused by gas leakage.

[0003] Currently, when installing a general self-closing valve, usually an internal thread and an external thread are provided at both ends of the self-closing valve body, and then the two ends are respectively connected to two gas pipelines through the internal thread and the external thread. However, this connection method requires the installer to tighten the connection between the gas pipeline and the self-closing valve to prevent gas leakage from the connection. When the installer has relatively little strength or there are no installation tools such as wrenches at hand, it is very difficult to tightly connect the self-closing valve to the gas pipeline, and a lot of effort and time are required for installation, which is rather inconvenient. Utility Model Content

[0004] In order to reduce the installation difficulty of the self-closing valve and improve the installation efficiency, this application provides a gas self-closing valve for quick installation.

[0005] A gas self-closing valve for quick installation provided by this application adopts the following technical solutions:

[0006] A gas self-closing valve for quick installation includes a valve body. Connecting mechanisms are provided at both ends of the valve body. The valve body is connected to a gas pipeline through the connecting mechanisms. The connecting mechanisms include:

[0007] A first connecting outer pipe, which is arranged at the end of the gas pipeline;

[0008] A second connecting outer pipe, which is arranged at the end of the valve body;

[0009] A connecting buckle plate, which is arranged on the first connecting outer pipe and is made of an elastic material;

[0010] A buckling block, which is arranged on the connecting buckle plate. A buckling groove is formed on the second connecting outer pipe. When the first connecting outer pipe and the second connecting outer pipe are pressed tightly together, the buckling block is in snap-fit with the buckling groove;

[0011] A ventilation assembly, which is arranged on the first connecting outer pipe and the second connecting outer pipe and is used for connecting the interiors of the first connecting outer pipe and the second connecting outer pipe when the buckling block is in snap-fit with the buckling groove.

[0012] By adopting the above technical solution, the moving valve body drives the second connecting outer tube to move, so that the end of the first connecting outer tube abuts against the end of the second connecting outer tube. After the first connecting outer tube and the second connecting outer tube are abutted, the buckling block is buckled with the buckling groove under the action of the connecting buckle plate, and the ventilation component ventilates the interiors of the first connecting outer tube and the second connecting outer tube, thus completing the connection work between the valve body and the gas pipeline. The structure is simple. It only needs to move the first connecting outer tube and the second connecting outer tube to make the buckling block on the connecting buckle plate buckle the buckling groove, which is convenient and fast, has high installation efficiency, and is suitable for a wide range of people.

[0013] Optionally, the ventilation component includes:

[0014] A first ventilation pipe, one end of the first ventilation pipe is arranged on the inner side wall of the first connecting outer tube, and the other end of the first ventilation pipe extends out of the first connecting outer tube;

[0015] A second ventilation pipe, the second ventilation pipe is arranged in the second connecting outer tube. When the buckling block is buckled with the buckling groove, the first ventilation pipe extends into the second connecting outer tube and abuts against the second ventilation pipe.

[0016] By adopting the above technical solution, the first ventilation pipe is installed on the first connecting outer tube, and the second ventilation pipe is installed on the second connecting outer tube. When the first connecting outer tube and the second connecting outer tube are abutted, the first ventilation pipe extends into the second connecting outer tube and abuts against the second ventilation pipe. The first ventilation pipe and the second ventilation pipe cooperate to ventilate gas. Thus, while completing the ventilation work, the probability of gas leakage is reduced through the tight seal between the first ventilation pipe and the second ventilation pipe and the tight seal between the first connecting outer tube and the second connecting outer tube, ensuring the sealing performance and safety when the valve body is connected to the gas pipeline.

[0017] Optionally, a first sealing mechanism for sealing the first ventilation pipe is arranged on the first ventilation pipe, and the first sealing mechanism includes:

[0018] A first sealing column, the first sealing column is slidably arranged in the first ventilation pipe along the axial direction of the first ventilation pipe;

[0019] A first sealing ring, the first sealing ring is arranged at the end of the first ventilation pipe;

[0020] A first moving component, the first moving component is arranged on the first ventilation pipe and is used to drive the first sealing column to move, and the first sealing column abuts against the first sealing ring under the action of the first moving component.

[0021] By adopting the above technical solution, when the first ventilation pipe is not connected to the second ventilation pipe, the first sealing column is pressed against the first sealing ring under the action of the first moving component, thereby closing the air outlet of the first ventilation pipe, reducing the probability of gas leakage from the first ventilation pipe in the gas pipeline, and ensuring the safety when the valve body is connected to the gas pipeline.

[0022] Optionally, the first moving component includes:

[0023] A first sealing spring, one end of the first sealing spring is arranged inside the first ventilation pipe, and the other end of the first sealing spring is connected to the first sealing column. The first sealing column is pressed against the first sealing ring under the action of the first sealing spring;

[0024] A push rod, the push rod is arranged on the second ventilation pipe. When the first ventilation pipe and the second ventilation pipe are pressed tightly together, the push rod pushes the first sealing column to compress the first sealing spring and separate from the first sealing ring.

[0025] By adopting the above technical solution, when the first ventilation pipe is not connected to the second ventilation pipe, the first sealing column is pressed against the first sealing ring under the action of the first sealing spring to seal the air outlet of the first ventilation pipe. When the first ventilation pipe extends into the second connecting outer pipe and contacts the second ventilation pipe, the first sealing column contacts the push rod, and the push rod pushes the first sealing column to compress the first sealing spring and separate from the first sealing ring, thereby opening the first ventilation pipe and enabling the gas in the gas pipeline to flow out of the first ventilation pipe.

[0026] Optionally, a second sealing mechanism for sealing the second ventilation pipe is arranged on the second ventilation pipe, and the second sealing mechanism includes:

[0027] A second sealing column, the second sealing column is slidably arranged along the axial direction of the second ventilation pipe inside the second ventilation pipe;

[0028] A second sealing ring, the second sealing ring is arranged on the second ventilation pipe;

[0029] A second moving component, the second moving component is arranged on the second ventilation pipe, and the second sealing column is pressed against the second sealing ring under the action of the second moving component.

[0030] By adopting the above technical solution, when the first ventilation pipe is not connected to the second ventilation pipe, the second sealing column is pressed against the second sealing ring under the action of the second moving component, thereby sealing the opening of the second ventilation pipe through the second sealing column, reducing the probability of air leakage at the other end of the valve body when one end of the valve body is connected to the gas pipeline, and ensuring the safety when the valve body is connected to the gas pipeline.

[0031] Optionally, the ejector rod is axially slidably arranged on the second air pipe and connected to the second sealing column. The second moving assembly includes:

[0032] A second sealing spring, which is arranged on the second air pipe and connected to the second sealing column. The second sealing column is pressed against the second sealing ring under the action of the second sealing spring. The elastic coefficient of the second sealing spring is greater than that of the first sealing spring;

[0033] A first limiting ring, which is arranged on the first air pipe;

[0034] A second limiting block, which is arranged on the first sealing column. After the first sealing column is separated from the first sealing ring under the action of the ejector rod, the second limiting block abuts against the first limiting ring.

[0035] By adopting the above technical solution, when the first air pipe is not connected to the second air pipe, the second sealing column is pressed against the second sealing ring under the action of the second sealing spring; when the first air pipe extends into the second connecting outer pipe and contacts the second air pipe, since the elastic coefficient of the second sealing spring is greater than that of the first sealing spring, the ejector rod will first drive the first sealing column to compress the first sealing spring and move. The movement of the first sealing column drives the second limiting block to move. When the second limiting block moves to abut against the first limiting ring, the first sealing column stops moving. As the first air pipe continues to move, the first sealing column in turn drives the ejector rod to move. The movement of the ejector rod drives the second sealing column to compress the second sealing spring and move. The second sealing column compressing the second sealing spring to move separates from the second sealing ring, so that the gas flowing out of the first air pipe can enter the second air pipe and pass through the second air pipe, thus completing the work of the internal communication between the first air pipe and the second air pipe when the first air pipe and the second air pipe are abutted.

[0036] Optionally, sealing rubber rings are sleeved on the side walls of the first sealing column and the second sealing column near the first sealing ring and the second sealing ring.

[0037] By adopting the above technical solution, sealing rubber rings are sleeved on the side walls of the first sealing column and the second sealing column near the first sealing ring and the second sealing ring respectively, thereby improving the airtightness when the first sealing column and the second sealing column abut against the first sealing ring and the second sealing ring respectively, and reducing the probability of gas leakage.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. Driving the second connecting outer pipe to move by moving the valve body, so that the end of the first connecting outer pipe abuts against the end of the second connecting outer pipe. After the first connecting outer pipe and the second connecting outer pipe abut, the buckling block is buckled with the buckling groove under the action of the connecting buckle plate, and the ventilation component ventilates the interiors of the first connecting outer pipe and the second connecting outer pipe, thus completing the connection work between the valve body and the gas pipeline. The structure is simple. It only needs to move the first connecting outer pipe and the second connecting outer pipe to make the buckling block on the connecting buckle plate buckle the buckling groove, which is convenient and fast, has high installation efficiency, and is suitable for a wide range of people;

[0040] 2. By installing a first ventilation pipe on the first connecting outer pipe and a second ventilation pipe on the second connecting outer pipe, when the first connecting outer pipe and the second connecting outer pipe abut, the first ventilation pipe extends into the second connecting outer pipe and abuts against the second ventilation pipe, and the first ventilation pipe and the second ventilation pipe cooperate to pass gas. Thus, while completing the ventilation work, the tight seal between the first ventilation pipe and the second ventilation pipe and the tight seal between the first connecting outer pipe and the second connecting outer pipe are used to reduce the probability of gas leakage, ensuring the tightness and safety when the valve body is connected to the gas pipeline;

[0041] 3. By sleeving sealing rubber rings on the side walls of the first sealing column and the second sealing column near the ends of the first sealing ring and the second sealing ring, the airtightness when the first sealing column and the second sealing column respectively contact the first sealing ring and the second sealing ring is improved, and the probability of gas leakage is reduced. Description of the Drawings

[0042] Figure 1 is the three-dimensional structure schematic diagram of the present application;

[0043] Figure 2 is the structural schematic diagram of the connecting mechanism in the present application, in which the side walls of the first connecting outer pipe, the second connecting outer pipe, the first ventilation pipe and the second ventilation pipe are sectioned;

[0044] Figure 3 is the structural schematic diagram of the first sealing mechanism in the present application, in which the side walls of the first connecting outer pipe and the first ventilation pipe are sectioned;

[0045] Figure 4 is the structural schematic diagram of the second sealing mechanism in the present application, in which the side walls of the second connecting outer pipe and the second ventilation pipe are sectioned;

[0046] Reference signs: 1, valve body; 11, buckling groove; 12, sealing rubber ring; 2, connecting mechanism; 21, first connecting outer pipe; 22, second connecting outer pipe; 23, connecting buckle plate; 24, buckling block; 25, ventilation assembly; 26, first ventilation pipe; 27, second ventilation pipe; 3, first sealing mechanism; 31, first sealing column; 32, first sealing ring; 33, first moving assembly; 34, first sealing spring; 35, ejector rod; 4, second sealing mechanism; 41, second sealing column; 42, second sealing ring; 43, second moving assembly; 44, second sealing spring; 45, first limiting ring; 46, second limiting block. Detailed implementation manners

[0047] The following will further describe the present application in detail with reference to the Figure 1 - attached Figure 4 drawings.

[0048] An embodiment of the present application discloses a gas self-closing valve for quick installation.

[0049] Referring to Figure 1 , the gas self-closing valve for quick installation includes a valve body 1. Connecting mechanisms 2 are provided at both ends of the valve body 1. The valve body 1 is connected to a gas pipeline through the connecting mechanisms 2.

[0050] Referring to Figure 1 and Figure 2 , the connecting mechanism 2 includes a first connecting outer pipe 21, a second connecting outer pipe 22, a connecting buckle plate 23, a buckling block 24 and a ventilation assembly 25. The first connecting outer pipe 21 is fixedly connected to the end of the gas pipeline. The second connecting outer pipe 22 is fixedly connected to the end of the valve body 1. One end of the connecting buckle plate 23 is fixedly connected to the outer side wall of the first connecting outer pipe 21. The other end of the connecting buckle plate 23 extends out of the first connecting outer pipe 21 along the axial direction of the first connecting outer pipe 21, and the buckling block 24 is fixedly connected to the end of the connecting buckle plate 23 far from the first connecting outer pipe 21. A buckling groove 11 is provided on the outer side wall of the second connecting outer pipe 22. When the first connecting outer pipe 21 and the second connecting outer pipe 22 are pressed tightly together, the buckling block 24 is engaged with the buckling groove 11 in a snap-fit manner.

[0051] Referring to Figure 1 and Figure 2 , moving the valve body 1 drives the second connecting outer pipe 22 to move, so that the end of the first connecting outer pipe 21 is pressed tightly against the end of the second connecting outer pipe 22. After the first connecting outer pipe 21 and the second connecting outer pipe 22 are pressed tightly together, the buckling block 24 is engaged with the buckling groove 11 under the action of the connecting buckle plate 23, thereby completing the connection between the valve body 1 and the gas pipeline. The structure is simple. It only needs to move the first connecting outer pipe 21 and the second connecting outer pipe 22 so that the buckling block 24 on the connecting buckle plate 23 buckles the buckling groove 11, which is convenient and fast, has high installation efficiency, and is suitable for a wide range of people.

[0052] Reference Figure 1 and Figure 2 As shown in FIGS. and, the ventilation assembly 25 is arranged on the first connecting outer pipe 21 and the second connecting outer pipe 22 and is used to connect the interiors of the first connecting outer pipe 21 and the second connecting outer pipe 22 when the buckling block 24 is buckled with the buckling groove 11. The ventilation assembly 25 includes a first ventilation pipe 26 and a second ventilation pipe 27. One end of the first ventilation pipe 26 is fixedly connected to one end of the first connecting outer pipe 21 close to the valve body 1, and the other end of the first ventilation pipe 26 extends outside the first connecting outer pipe 21. The second ventilation pipe 27 is fixedly connected to the inner side wall of the second connecting outer pipe 22. When the buckling block 24 is buckled with the buckling groove 11, the first ventilation pipe 26 extends into the second connecting outer pipe 22 and abuts against the second ventilation pipe 27 tightly.

[0053] Reference Figure 2 and Figure 3 As shown in FIGS. and, a first sealing mechanism 3 for sealing the first ventilation pipe 26 is arranged on the first ventilation pipe 26. The first sealing mechanism 3 includes a first sealing column 31, a first sealing ring 32 and a first moving assembly 33. The first sealing column 31 is slidably mounted in the first ventilation pipe 26 along the axial direction of the first ventilation pipe 26. The first sealing ring 32 is fixedly mounted at the air outlet of the first ventilation pipe 26. The first moving assembly 33 is arranged on the first ventilation pipe 26 and is used to drive the first sealing column 31 to move. The first sealing column 31 abuts against the first sealing ring 32 under the action of the first moving assembly 33. A sealing rubber ring 12 is sleeved on one end of the first sealing column 31 that abuts against the first sealing ring 32.

[0054] Reference Figure 2 and Figure 3 As shown in FIGS. and, the first moving assembly 33 includes a first sealing spring 34 and a push rod 35. One end of the first sealing spring 34 is fixedly connected inside the first ventilation pipe 26, and the other end of the first sealing spring 34 is fixedly connected to the first sealing column 31. The first sealing column 31 abuts against the first sealing ring 32 under the action of the first sealing spring 34. The push rod 35 is fixedly connected inside the second ventilation pipe 27. When the first ventilation pipe 26 abuts against the second ventilation pipe 27 tightly, the push rod 35 pushes the first sealing column 31 to compress the first sealing spring 34 and separate from the first sealing ring 32.

[0055] Reference Figure 2 and Figure 3, when the first ventilation pipe 26 is not connected to the second ventilation pipe 27, the first sealing column 31 abuts against the first sealing ring 32 under the action of the first sealing spring 34 to seal the air outlet of the first ventilation pipe 26. When the first ventilation pipe 26 extends into the second connecting outer pipe 22 and contacts the second ventilation pipe 27, the first sealing column 31 contacts the ejector rod 35. The ejector rod 35 pushes the first sealing column 31 to compress the first sealing spring 34 and separate from the first sealing ring 32, thereby opening the first ventilation pipe 26 so that the gas in the gas pipeline can flow out of the first ventilation pipe 26.

[0056] Refer to Figure 2 and Figure 4 , a second sealing mechanism 4 for sealing the second ventilation pipe 27 is provided on the second ventilation pipe 27. The second sealing mechanism 4 includes a second sealing column 41, a second sealing ring 42 and a second moving assembly 43. The second sealing column 41 is slidably mounted in the second ventilation pipe 27 along the axial direction of the second ventilation pipe 27. The second sealing ring 42 is fixedly connected to the end of the second ventilation pipe 27. The second moving assembly 43 is arranged on the second ventilation pipe 27, and the second sealing column 41 abuts against the second sealing ring 42 under the action of the second moving assembly 43. A sealing rubber ring 12 is sleeved on the end of the second sealing column 41 in contact with the second sealing ring 42.

[0057] Refer to Figure 2 and Figure 3 , the ejector rod 35 is slidably arranged on the second ventilation pipe 27 along the axial direction of the second ventilation pipe 27 and is connected to the second sealing column 41. The second moving assembly 43 includes a second sealing spring 44, a first limiting ring 45 and a second limiting block 46. One end of the second sealing spring 44 is fixedly connected inside the second ventilation pipe 27, and the other end of the second sealing spring 44 is fixedly connected to the second sealing column 41. The second sealing column 41 abuts against the second sealing ring 42 under the action of the second sealing spring 44. The elastic coefficient of the second sealing spring 44 is greater than that of the first sealing spring 34. The first limiting ring 45 is fixedly installed at one end of the first ventilation pipe 26 away from the first sealing ring 32. The second limiting block 46 is fixedly connected to the outer side wall of the first sealing column 31. After the first sealing column 31 separates from the first sealing ring 32 under the action of the ejector rod 35, the second limiting block 46 abuts against the first limiting ring 45.

[0058] Refer to Figure 3 and Figure 4, when the first ventilation pipe 26 is not connected to the second ventilation pipe 27, the second sealing column 41 abuts against the second sealing ring 42 under the action of the second sealing spring 44; when the first ventilation pipe 26 extends into the second connecting outer pipe 22 and contacts the second ventilation pipe 27, since the elastic coefficient of the second sealing spring 44 is greater than that of the first sealing spring 34, the ejector rod 35 will first drive the first sealing column 31 to compress the first sealing spring 34 and move. The movement of the first sealing column 31 drives the second limiting block 46 to move. When the second limiting block 46 moves to abut against the first limiting ring 45, the first sealing column 31 will no longer move. As the first ventilation pipe 26 continues to move, the first sealing column 31 in turn drives the ejector rod 35 to move. The movement of the ejector rod 35 drives the second sealing column 41 to compress the second sealing spring 44 and move. The movement of the second sealing column 41 compressing the second sealing spring 44 separates from the second sealing ring 42, so that the gas flowing out of the first ventilation pipe 26 can enter the second ventilation pipe 27 and pass through the second ventilation pipe 27, thus completing the work of the internal communication between the first ventilation pipe 26 and the second ventilation pipe 27 when the first ventilation pipe 26 and the second ventilation pipe 27 are abutted.

[0059] The working principle of the embodiment of the present application is as follows:

[0060] Moving the valve body 1 drives the second connecting outer pipe 22 to move, so that the end of the first connecting outer pipe 21 abuts against the end of the second connecting outer pipe 22. After the first connecting outer pipe 21 and the second connecting outer pipe 22 are abutted, the buckling block 24 is buckled with the buckling groove 11 under the action of the connecting buckle plate 23, and the ventilation assembly 25 ventilates the interiors of the first connecting outer pipe 21 and the second connecting outer pipe 22, thus completing the connection work between the valve body 1 and the gas pipeline. The structure is simple. It only needs to move the first connecting outer pipe 21 and the second connecting outer pipe 22 so that the buckling block 24 on the connecting buckle plate 23 buckles the buckling groove 11, which is convenient and fast, has high installation efficiency, and is suitable for a wide range of people.

[0061] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A quick-install gas self-closing valve, characterized in that: The invention comprises a valve body (1), both ends of the valve body (1) are provided with connection mechanisms (2), the valve body (1) is connected to a gas pipeline via the connection mechanism (2), and the connection mechanism (2) comprises: A first connecting outer pipe (21), the first connecting outer pipe (21) being arranged at the end of the gas pipeline; A second connecting outer tube (22), the second connecting outer tube (22) being arranged at an end of the valve body (1); A connecting buckle plate (23), wherein the connecting buckle plate (23) is arranged on the first connecting outer tube (21), and the connecting buckle plate (23) is a connecting buckle plate (23) made of an elastic material; a buckle block (24), the buckle block (24) being arranged on the connecting buckle plate (23), the second connecting outer tube (22) being provided with a buckle groove (11), and when the first connecting outer tube (21) and the second connecting outer tube (22) are pressed together, the buckle block (24) is snap-fitted with the buckle groove (11); A vent assembly (25) is provided on the first connecting outer tube (21) and the second connecting outer tube (22) and is used to connect the interiors of the first connecting outer tube (21) and the second connecting outer tube (22) when the buckle block (24) is snap-fitted with the buckle groove (11).

2. A quick-install gas self-closing valve according to claim 1, characterized in that: The ventilation assembly (25) comprises: A first ventilation pipe (26), one end of the first ventilation pipe (26) being arranged on the inner side wall of the first connecting outer pipe (21), and the other end of the first ventilation pipe (26) extending out of the first connecting outer pipe (21); A second ventilation pipe (27), wherein the second ventilation pipe (27) is arranged in the second connecting outer pipe (22); when the buckle block (24) is engaged with the buckle groove (11), the first ventilation pipe (26) extends into the second connecting outer pipe (22) and presses against the second ventilation pipe (27).

3. A quick-install gas self-closing valve according to claim 2, characterized in that: The first ventilation pipe (26) is provided with a first sealing mechanism (3) for sealing the first ventilation pipe (26), and the first sealing mechanism (3) comprises: A first sealing column (31), the first sealing column (31) being slidably disposed in the first ventilation pipe (26) along the axial direction of the first ventilation pipe (26); A first sealing ring (32), the first sealing ring (32) being arranged at an end of the first ventilation pipe (26); A first moving component (33), wherein the first moving component (33) is arranged on the first ventilation pipe (26) and is used to drive the first sealing column (31) to move, wherein the first sealing column (31) is pressed against the first sealing ring (32) under the action of the first moving component (33).

4. A quick-install gas self-closing valve according to claim 3, characterized in that: The first moving component (33) comprises: a first sealing spring (34), one end of the first sealing spring (34) being arranged in the first ventilation pipe (26), the other end of the first sealing spring (34) being connected to the first sealing column (31), the first sealing column (31) being pressed tightly against the first sealing ring (32) under the action of the first sealing spring (34); A push rod (35), wherein the push rod (35) is arranged on the second ventilation pipe (27), and when the first ventilation pipe (26) and the second ventilation pipe (27) are pressed together, the push rod (35) pushes the first sealing column (31) to compress the first sealing spring (34) and separate from the first sealing ring (32).

5. A quick-install gas self-closing valve according to claim 4, characterized in that: The second ventilation pipe (27) is provided with a second sealing mechanism (4) for sealing the second ventilation pipe (27), and the second sealing mechanism (4) comprises: A second sealing column (41), the second sealing column (41) being slidably disposed in the second ventilation pipe (27) along the axial direction of the second ventilation pipe (27); A second sealing ring (42), wherein the second sealing ring (42) is arranged on the second ventilation pipe (27); A second movable assembly (43), wherein the second movable assembly (43) is arranged on the second ventilation pipe (27), and the second sealing column (41) is pressed against the second sealing ring (42) under the action of the second movable assembly (43).

6. A quick-install gas self-closing valve according to claim 5, characterized in that: The push rod (35) is axially slidably disposed on the second ventilation pipe (27) and connected to the second sealing column (41). The second moving assembly (43) comprises: a second sealing spring (44), the second sealing spring (44) being arranged on the second ventilation pipe (27) and connected to the second sealing column (41), the second sealing column (41) being pressed against the second sealing ring (42) under the action of the second sealing spring (44), the elastic coefficient of the second sealing spring (44) being greater than the elastic coefficient of the first sealing spring (34); A first limiting ring (45), wherein the first limiting ring (45) is arranged on the first ventilation pipe (26); A second limiting block (46), wherein the second limiting block (46) is arranged on the first sealing column (31), and after the first sealing column (31) is separated from the first sealing ring (32) under the action of the push rod (35), the second limiting block (46) abuts against the first limiting ring (45).

7. A quick-install gas self-closing valve according to claim 5, characterized in that: A sealing rubber ring (12) is sleeved on the side wall of one end of the first sealing column (31) and the second sealing column (41) close to the first sealing ring (32) and the second sealing ring (42).

Images