Gas extinguishing protection valve

Abstract

A valve shell in the novel valve structure comprises a valve element shell body and a control valve shell body which are integrally connected, the valve element shell body and the control valve shell body are used for containing a valve element assembly and a normally-closed control valve respectively, and the axial direction of the valve element shell body and the axial direction of the control valve shell body are perpendicular to each other. A steering transmission mechanism is arranged in an inner cavity of the connecting position of the valve element shell and the control valve shell, linear feeding motion output by the driving rod is converted into pushing motion on the normally-closed control valve in the vertical direction, and a valve inner structure which needs to be distributed on the same straight line originally is converted into two structural bodies which are distributed perpendicularly. Therefore, the effect of shortening the overall axial occupied space of the valve is achieved, and the adaptability of the gas extinguishing protection valve to gas equipment with different space distribution conditions is greatly enhanced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a gas exhaust protection valve. Background Technology

[0002] A flameout protection valve is a valve used to automatically control the opening and closing of combustible gases. When a combustible gas leaks, the flameout protection valve can automatically and forcibly cut off the output of the combustible gas, thereby playing an effective protective role. A typical gas control valve includes a valve body, a valve core, and a valve stem connected to the valve core. By pressing and rotating the valve stem, the gas passage inside the valve body can be connected and the amount of gas in the gas passage can be regulated. A micro switch is also installed on the outside of the valve body for gas ignition. To ensure a safe flameout effect, a normally closed control valve is installed inside the valve. The commonly used design is a normally closed solenoid valve. The valve stem pushes the structure inside the valve core to push or press the normally closed solenoid valve to connect the gas inlet end of the protection valve, and the valve stem drives the valve core to rotate to adjust the gas output of the gas passage.

[0003] Based on the working principle of this commonly used flameout protection valve design, the central axis of the normally closed control valve inside the valve, the valve stem, and the central axis of one end of the valve core are located on the same straight line. Therefore, the flameout protection valve must have a large axial length, which makes the space distribution of gas storage and use equipment a certain requirement. However, in reality, such space requirements cannot always be met, resulting in considerable inconvenience in the installation and use of gas flameout protection valves.

[0004] In summary, existing gas flameout protection valves suffer from a large axial length, which restricts their use in valve equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing gas flameout protection valve has a large axial length, which restricts the use of valve equipment.

[0006] To address the aforementioned problems, this utility model provides a gas exhaust protection valve, comprising a valve housing and a valve core assembly disposed within the cavity of the valve housing. A drive rod connected to the valve core assembly passes through one end of the valve housing, and a normally closed control valve is disposed at the other end of the valve housing. An inlet and an outlet are respectively disposed on the side of the valve housing. The normally closed control valve is opened by the drive rod, which drives the valve core assembly to change the communication state between the inlet and outlet and the cavity of the valve housing, thereby adjusting the valve output. The valve housing includes an integrally connected valve core housing and a control valve housing, respectively accommodating the valve core assembly and the normally closed control valve. The axial directions of the valve core housing and the control valve housing are perpendicular to each other. A steering transmission mechanism is disposed in the internal cavity at the connection point of the valve core housing and the control valve housing, converting the linear feed motion output by the drive rod into a vertical pushing action on the normally closed control valve.

[0007] This novel gas shut-off valve features a bent design with a valve body consisting of two perpendicular shell sections. This design allows the axial direction of the normally closed control valve to be perpendicular to the axial direction of the valve core and drive rod, significantly shortening the overall axial length of the shut-off valve. A steering transmission mechanism within the two perpendicular shell sections enables the conversion of the linear feed direction of the drive rod, simultaneously satisfying the driving requirements of both the valve core assembly and the normally closed control valve. This valve shell and internal transmission design transforms the original linearly distributed internal structure into two perpendicularly distributed main structures, thereby reducing the overall axial space occupied by the valve and greatly enhancing its adaptability to gas equipment with different spatial distributions.

[0008] As a preferred embodiment, the valve core assembly includes a valve core rod that abuts against the end of the drive rod and a hollow cylindrical valve core body. The valve core rod is coaxially inserted through the valve core body. The side wall of the valve core body is provided with a group of control holes that connect its internal and external spaces. The valve core body is driven to rotate by the drive rod to adjust the alignment between the group of control holes and the air inlet and outlet ports on the valve housing, thereby adjusting the output of the gas.

[0009] This design provides a preferred valve core assembly design. The axial feed of the drive rod structure can drive the axial movement of the valve core rod, so that the movement can be transmitted to the steering transmission mechanism to push the normally closed control valve. It can also transmit circumferential rotational movement through the drive rod, thereby driving the rotation of the valve core body to change the angular relationship between the control hole group on the hollow valve core body and the air inlet and outlet ports on the valve housing. The amount of gas output through the ports can be adjusted by changing the blocking range of the valve core body on these two ports.

[0010] As a preferred embodiment, the drive rod has a lateral positioning pin on the end facing the valve core rod, and the valve core body has a positioning slot parallel to the feed direction of the drive rod on its side wall. The positioning slot has an opening at the edge of the valve core body to accommodate the lateral positioning pin. This design optimizes the mating structure between the drive rod and the valve core body. By setting a positioning slot in the valve core body and a lateral positioning pin near the end of the outer circumference of the drive rod, the circumferential locking between the drive rod and the valve core body can be achieved through the interlocking of the pin and the slot, effectively transmitting the circumferential rotation of the drive rod to the valve core body. The valve core body has an opening on the edge facing the drive rod that connects to the positioning slot. This structure allows the lateral positioning pin to enter the positioning slot when the drive rod and the valve core body move axially toward each other, and to disengage from the positioning slot when the drive rod and the valve core body move axially in opposite directions. This structure facilitates the linkage between the drive control of the normally closed control valve and the control action of the valve core assembly. That is, only when the drive rod axially pushes the valve core rod to a preset distance range, putting the normally closed control valve in the open state, does the drive rod have a circumferential positioning relationship with the valve core body. The rotation of the drive rod can drive the rotation of the valve core body to adjust the gas output.

[0011] As a preferred embodiment, the inner wall of the valve core body is provided with a ring-shaped protrusion limiting ring, the valve core rod passes through the central hole of the limiting ring, the valve core rod is provided with an enlarged end at the end that abuts against the end of the drive rod, and a reset compression spring is sleeved on the outer periphery of the valve core rod to spring back the valve core rod and disengage the lateral positioning pin of the drive rod from the positioning slot.

[0012] This design further optimizes the fit between the valve core body and the drive rod based on the aforementioned structure. In particular, it achieves circumferential limiting and disengagement between the drive rod and the valve core body through the valve core rod. A limiting ring structure is set on the inner wall of the valve core body on the side facing the drive rod. Through this structure, in conjunction with the enlarged end of the valve core rod, a reset compression spring is set between the two. In this way, after the axial driving force of the drive rod is released, the drive rod is pushed back to its original axial position by the valve core rod under the action of the spring to achieve reset. At the same time, the lateral positioning pin is removed from the positioning slot, which avoids valve leakage caused by accidental rotation of the drive rod after the gas valve is closed, effectively improving valve safety.

[0013] As a preferred embodiment, a support washer and a sealing ring are fitted around the outer periphery of the valve core rod. The support washer abuts against the end of the reset compression spring, and the sealing ring is located between the end faces of the support washer and the limiting ring. For the sake of sealing the valve cavity, and to prevent gas leakage through the passage between the valve core rod and the valve core body, a support washer and a sealing ring are provided in conjunction with the aforementioned reset compression spring. The sealing ring is made of an elastic rubber material to ensure a sealing effect, and the spring provides clamping force to maintain the continuous seal.

[0014] As a preferred embodiment, the steering transmission mechanism includes a push-up conical surface structure located at the end of the valve core rod and a push-up slider that abuts against the push-up conical surface structure. The push-up slider is slidably disposed within the control valve housing. The end face of the push-up slider that abuts against the end of the valve core rod is also provided with a push-up conical surface structure. The axial feed motion of the valve core rod is transmitted vertically through the abutting of the push-up conical surface structures of the valve core rod and the push-up slider.

[0015] This design provides a preferred steering transmission mechanism structure, consisting of two abutting components. A push-up conical surface structure is provided at both the end of the abutting valve core rod and the end face of the push-up slider. The abutting of the conical surfaces allows for vertical displacement transmission. The push-up slider is slidably accommodated within the cavity of the control valve housing. Its position is relative to the push-up control end of the normally closed control valve within the control valve housing at a predetermined distance. When the valve core rod is fed axially, it pushes the push-up slider to move perpendicularly to the valve core rod within the control valve housing, thereby outputting a push-up action to the control end of the normally closed control valve to control its opening.

[0016] As a preferred embodiment, the push slider has a pressing boss structure at its opposite end to the push cone structure, which is used to abut against the elastic pressure rod of the normally closed control valve. This design optimizes the smooth cooperation between the push slider and the normally closed control valve under the pushing action of the valve core rod. The raised pressing boss structure at the end of the push slider used to push the control valve is adapted to the shape of the control end of the normally closed control valve.

[0017] As a preferred embodiment, the push slider has three axially oriented sliding strips integrally connected to its outer surface, which slide in contact with the inner wall of the control valve housing. This design provides a preferred structural design suitable for the movement of the push slider. By providing protruding sliding strips on the outer surface of the push slider, instead of directly sliding with the inner cavity of the control valve housing through its entire outer surface, it avoids excessive friction and difficulty in sliding caused by the fit dimensions between the push slider and the inner cavity.

[0018] As a preferred embodiment, the valve core housing has three evenly distributed raised support ribs on its inner peripheral wall adjacent to the control valve housing. The valve core rod passes through the support ribs, and the top end face of the support ribs slides in engagement with the outer peripheral surface of the valve core rod. This design further optimizes the fit between the valve core housing and the valve core rod. By providing raised support ribs within the valve core housing, the valve core rod can be well limited, ensuring the straightness of the valve core rod's feed and the accuracy of the pusher slider's movement. Attached Figure Description

[0019] Figure 1 A schematic diagram of the external overall structure of a gas exhaust protection valve provided by this utility model;

[0020] Figure 2 for Figure 1 A side cross-sectional view of the gas-fired shut-off valve.

[0021] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of a gas-fired shut-off valve;

[0022] Figure 4 for Figure 1 An exploded structural diagram showing the location of the valve core assembly of the gas-fired shut-off valve.

[0023] in, Figures 1-4 middle:

[0024] 1. Valve body; 2. Inlet port; 3. Outlet port; 4. Drive rod; 5. Valve core rod; 6. Valve core body; 7. Push slider; 8. Sealing ring; 9. Support washer; 10. Lateral positioning pin; 11. Return compression spring; 12. Limit ring; 13. Normally closed control valve; 14. Control valve body; 15. Valve core body; 16. Enlarged end; 17. Control hole assembly; 18. Support rib structure; 19. Push oblique conical surface structure; 20. Positioning slot; 21. Slide bar structure; 22. Pressing boss structure. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] refer to Figures 1-4 The following examples illustrate this. Figure 1 A schematic diagram of the external overall structure of a gas exhaust protection valve provided by this utility model; Figure 2 for Figure 1 A side cross-sectional view of the gas-fired shut-off valve. Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of a gas-fired shut-off valve; Figure 4 for Figure 1 An exploded structural diagram showing the location of the valve core assembly of the gas-fired shut-off valve.

[0029] The gas exhaust valve provided in this embodiment includes a valve housing 1 and a valve core assembly disposed in the cavity of the valve housing 1. One end of the valve housing 1 is provided with a drive rod 4 connected to the valve core assembly, and the other end of the valve housing 1 is provided with a normally closed control valve 13. The side of the valve housing 1 is provided with an air inlet 2 and an air outlet 3 respectively. The normally closed control valve 13 is opened by the drive rod 4, and the valve core assembly is driven to move to change the communication state between the air inlet 2 and the air outlet 3 and the cavity of the valve housing 1, so as to adjust the valve output. The valve housing 1 includes a valve core housing 15 and a control valve housing 14 integrally connected, which are used to accommodate the valve core assembly and the normally closed control valve 13 respectively. The axial directions of the valve core housing 15 and the control valve housing 14 are perpendicular to each other. The internal cavity at the connection position of the valve core housing 15 and the control valve housing 14 is provided with a steering transmission mechanism, which converts the linear feed motion output by the drive rod 4 into a vertical pushing action on the normally closed control valve 13.

[0030] The novel gas shut-off valve provided by this utility model adopts a bent design, with its valve body 1 consisting of two mutually perpendicular shell parts. This allows the axis of the normally closed control valve 13 in the valve to be perpendicular to the axis of the valve core and the drive rod 4, greatly shortening the overall axial length of the shut-off valve. Through a steering transmission mechanism, the linear feed direction of the drive rod 4 is switched within the inner cavity of the two mutually perpendicular shell parts, so as to simultaneously meet the driving requirements of the valve core assembly and the normally closed control valve 13. Through this valve body 1 and internal transmission design, the valve internal structure, which originally had to be distributed in a straight line, is transformed into a two-part mutually perpendicular structure, thereby shortening the overall axial space occupied by the valve and greatly enhancing the adaptability of the gas shut-off valve to gas equipment with different spatial distributions.

[0031] In the technical solution provided in this embodiment, the valve core assembly includes a valve core rod 5 that abuts against the end of the drive rod 4 and a hollow cylindrical valve core body 6. The valve core rod 5 is coaxially inserted through the valve core body 6. The side wall of the valve core body 6 is provided with a control hole group 17 that connects its internal and external spaces. The valve core body 6 is driven to rotate by the drive rod 4 to adjust the alignment between the control hole group 17 and the air inlet 2 and air outlet 3 on the valve housing 1, so as to adjust the output of the gas.

[0032] This design provides a preferred valve core assembly design. The axial feed of the drive rod 4 structure can drive the axial movement of the valve core rod 5, so that the movement can be transmitted to the steering transmission mechanism to push the normally closed control valve 13. The drive rod 4 can also transmit circumferential rotational movement, which drives the rotation of the valve core body 6 to change the angular relationship between the control hole group 17 on the hollow valve core body 6 and the air inlet 2 and air outlet 3 on the valve housing 1. The amount of gas output through the interface can be adjusted by changing the blocking range of the valve core body 6 on these two interfaces.

[0033] In the technical solution provided in this embodiment, the drive rod 4 has a lateral positioning pin 10 on the end facing the valve core rod 5, and the valve core body 6 has a positioning slot 20 parallel to the feed direction of the drive rod 4 on its side wall. The positioning slot 20 has an opening at the edge of the valve core body 6 to accommodate the lateral positioning pin 10. This design optimizes the mating structure between the drive rod 4 and the valve core body 6. By setting the positioning slot 20 in the valve core body 6 and the lateral positioning pin 10 near the end of the outer circumferential surface of the drive rod 4, the circumferential locking between the drive rod 4 and the valve core body 6 can be achieved through the convex-concave fit between the pin and the slot, which can effectively transmit the circumferential rotation of the drive rod 4 to the valve core body 6. The valve core body 6 has an opening at the edge facing the drive rod 4 that connects to the positioning slot 20. This structure allows the drive rod 4 and the valve core body 6 to move axially towards each other. Lateral positioning pin 10 enters positioning slot 20, and when drive rod 4 and valve core body 6 move in opposite directions axially, lateral positioning pin 10 disengages from positioning slot 20. This structure allows for convenient linkage between the drive control of normally closed control valve 13 and the control action of valve core assembly. That is, when drive rod 4 axially pushes valve core rod 5 to a preset distance range, so that normally closed control valve 13 is in the open state, drive rod 4 and valve core body 6 have a circumferential positioning relationship. The gas output can be adjusted by rotating valve core body 6 through the rotation of drive rod 4.

[0034] In the technical solution provided in this embodiment, the inner side wall of the valve core body 6 is provided with a limiting ring 12 with an annular protrusion, the valve core rod 5 passes through the central hole of the limiting ring 12, the valve core rod 5 is provided with an enlarged end 16 at the end that abuts against the end of the drive rod 4, and a reset compression spring 11 is sleeved on the outer periphery of the valve core rod 5 to spring back the valve core rod 5 and disengage the lateral positioning pin 10 of the drive rod 4 from the positioning slot 20.

[0035] This design further optimizes the fit between the valve core body 6 and the drive rod 4 based on the above structure. In particular, the circumferential limiting disengagement between the drive rod 4 and the valve core body 6 is achieved by using the valve core rod 5. A limiting ring 12 is set on the inner wall of the valve core body 6 on the side facing the drive rod 4. Through this structure, in conjunction with the enlarged end of the valve core rod 5, a reset compression spring 11 is set between the two. In this way, after the axial driving force of the drive rod 4 is released, the drive rod 4 is pushed back to its original axial position by the valve core rod 5 under the action of the spring to achieve reset. At the same time, the lateral positioning pin 10 is withdrawn from the positioning slot 20, which avoids valve leakage caused by accidental contact due to the rotation of the drive rod 4 after the gas valve is closed, and effectively improves valve safety.

[0036] In the technical solution provided in this embodiment, a support washer 9 and a sealing ring 8 are fitted around the outer periphery of the valve core rod 5. The support washer 9 is used to abut against the end of the reset compression spring 11, and the sealing ring 8 is located between the end faces of the support washer 9 and the limiting ring 12. For the sake of sealing the inside of the valve cavity, and to prevent gas leakage through the passage between the valve core rod 5 and the valve core body 6, the support washer 9 and the sealing ring 8 are provided in conjunction with the aforementioned reset compression spring 11. The sealing ring 8 is made of an elastic rubber material to ensure a sealing effect, and the spring provides clamping force to maintain the continuous seal.

[0037] In the technical solution provided in this embodiment, the steering transmission mechanism includes a push-up conical surface structure 19 located at the end of the valve core rod 5 and a push-up slider 7 that abuts against the push-up conical surface structure 19. The push-up slider 7 is slidably disposed in the control valve housing 14. The end face of the push-up slider 7 that abuts against the end of the valve core rod 5 is also provided with a push-up conical surface structure 19. The axial feed motion of the valve core rod 5 is transmitted vertically through the abutment of the push-up conical surface structures 19 of the valve core rod 5 and the push-up slider 7.

[0038] This design provides a preferred steering transmission mechanism structure consisting of two abutting components. A push-in inclined conical structure 19 is provided on the end of the abutting valve core rod 5 and the end face of the push-in slider 7. The displacement can be transmitted vertically through the abutting of the inclined surfaces. The push-in slider 7 can be slidably accommodated in the cavity of the control valve housing 14. Its position is opposite to the push-in control end of the normally closed control valve 13 in the cavity of the control valve housing 14 at a preset distance. When the valve core rod 5 is fed axially, it pushes the push-in slider 7 to move perpendicularly to the valve core rod 5 in the control valve housing 14, thereby outputting a push-in action to the control end of the normally closed control valve 13 to control the opening of the normally closed control valve 13.

[0039] In the technical solution provided in this embodiment, the push slider 7 has a pressing boss structure 22 at the other end opposite to its push oblique conical surface structure 19, which is used to abut against the elastic pressure rod of the normally closed control valve 13. This design optimizes the smooth cooperation between the push slider 7 and the normally closed control valve 13 under the pushing action of the valve core rod 5. The push slider 7 has a raised pressing boss structure 22 at the end used to push the control valve, and the size and shape of this structure are adapted to the shape of the control end of the normally closed control valve 13.

[0040] In the technical solution provided in this embodiment, the push slider 7 has three axially oriented sliding strip structures 21 integrally connected to its outer side. These sliding strip structures 21 slide against the inner wall of the control valve housing 14. This design provides a preferred structural design suitable for the movement of the push slider 7. By providing protruding sliding strip structures 21 on the outer side of the push slider 7, instead of directly sliding against the inner cavity of the control valve housing 14 through its complete outer side, the design avoids excessive friction and difficulty in sliding caused by the fit dimensions between the push slider 7 and the inner cavity.

[0041] In the technical solution provided in this embodiment, the valve core housing 15 has three evenly distributed raised support rib structures 18 on its inner peripheral wall adjacent to the control valve housing 14. The valve core rod 5 passes through the support rib structures 18, and the top end face of the support rib structure 18 slides in engagement with the outer peripheral surface of the valve core rod 5. This design further optimizes the fit between the valve core housing 15 and the valve core rod 5. By providing raised support rib structures 18 in the inner cavity of the valve core housing 15, the valve core rod 5 can be well limited, ensuring the straightness of the valve core rod 5's feed and the accuracy of the pushing motion of the push slider 7.

[0042] Although the embodiments of this utility model have been disclosed above, the scope of protection of this utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A gas exhaust protection valve, comprising a valve housing (1) and a valve core assembly disposed in the cavity of the valve housing (1), wherein a drive rod (4) connected to the valve core assembly is disposed at one end of the valve housing (1), and a normally closed control valve (13) is disposed at the other end of the valve housing (1), and an air inlet (2) and an air outlet (3) are respectively disposed on the side of the valve housing (1), wherein the normally closed control valve (13) is opened by the drive rod (4), and the valve core assembly is driven to move to change the communication state between the air inlet (2) and the air outlet (3) and the cavity of the valve housing (1), so as to regulate the valve output, characterized in that, The valve housing (1) includes an integrally connected valve core housing (15) and control valve housing (14), which are used to accommodate the valve core assembly and the normally closed control valve (13), respectively. The axial directions of the valve core housing (15) and the control valve housing (14) are perpendicular to each other. The internal cavity at the connection position of the valve core housing (15) and the control valve housing (14) is provided with a steering transmission mechanism. The steering transmission mechanism is used to convert the linear feed motion output by the drive rod (4) into a vertical pushing action on the normally closed control valve (13).

2. The gas exhaust protection valve according to claim 1, characterized in that, The valve core assembly includes a valve core rod (5) that abuts against the end of the drive rod (4) and a hollow cylindrical valve core body (6). The valve core rod (5) is coaxially inserted through the valve core body (6). The side wall of the valve core body (6) is provided with a control hole group (17) that connects its internal and external spaces. The valve core body (6) and the drive rod (4) are circumferentially positionable and can be rotated by the drive rod (4) to adjust the alignment between the control hole group (17) and the air inlet (2) and air outlet (3) on the valve housing (1) to adjust the output of the gas.

3. The gas exhaust protection valve according to claim 2, characterized in that, The drive rod (4) has a lateral positioning pin (10) on the end side facing the valve core rod (5), and the valve core body (6) has a positioning slot (20) parallel to the feed direction of the drive rod (4) on its side wall. The positioning slot (20) has an opening at the edge of the valve core body (6) to accommodate the lateral positioning pin (10).

4. The gas exhaust protection valve according to claim 3, characterized in that, The inner wall of the valve core body (6) is provided with a limiting ring (12) with an annular protrusion. The valve core rod (5) passes through the central hole of the limiting ring (12). The valve core rod (5) is provided with an enlarged end (16) at one end that abuts against the end of the drive rod (4). A reset compression spring (11) is sleeved on the outer periphery of the valve core rod (5) to spring back the valve core rod (5) and disengage the lateral positioning pin (10) of the drive rod (4) from the positioning slot (20).

5. The gas extinction protection valve according to claim 4, characterized in that, The valve core rod (5) is fitted with a support washer (9) and a sealing ring (8) on its outer periphery. The support washer (9) is used to abut against the end of the reset compression spring (11), and the sealing ring (8) is located between the end faces of the support washer (9) and the limiting ring (12).

6. The gas exhaust protection valve according to any one of claims 2-5, characterized in that, The steering transmission mechanism includes a push-up conical surface structure (19) located at the end of the valve core rod (5) and a push-up slider (7) that abuts against the push-up conical surface structure (19). The push-up slider (7) is slidably disposed in the control valve housing (14). The end face of the push-up slider (7) that abuts against the end of the valve core rod (5) is also provided with a push-up conical surface structure (19). The axial feed motion of the valve core rod (5) is transmitted vertically through the abutting of the push-up conical surface structures (19) of the valve core rod (5) and the push-up slider (7).

7. The gas extinction protection valve according to claim 6, characterized in that, The push slider (7) has a pressing boss structure (22) at the other end opposite to its push inclined cone structure (19), which is used to abut against the elastic pressure rod of the normally closed control valve (13).

8. The gas extinction protection valve according to claim 6, characterized in that, The push slider (7) has three slide bar structures (21) integrally connected to its outer side along its axial direction, and the slide bar structures (21) slide in cooperation with the inner cavity sidewall of the control valve housing (14).

9. The gas extinction protection valve according to claim 6, characterized in that, The valve core housing (15) has three evenly distributed protruding support rib structures (18) on its inner peripheral wall adjacent to the control valve housing (14). The valve core rod (5) passes through the support rib structures (18), and the top end face of the support rib structure (18) slides with the outer peripheral surface of the valve core rod (5).

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