Liquefied petroleum gas cylinder valve

Abstract

The utility model provides a liquefied petroleum gas cylinder valve, which relates to the field of liquefied petroleum gas cylinder valves and comprises a valve body, an air flow channel is formed in the valve body, one end of the air flow channel is a cylinder valve air inlet and is connected with a steel cylinder, the other end of the air flow channel is a cylinder valve air outlet and is connected with a pressure reducing valve, and a valve core and an opening and closing valve are arranged in the valve body. The liquefied petroleum gas cylinder valve is characterized in that an overflowing self-closing assembly is arranged in a gas inlet of the cylinder valve, and when the gas outlet flow of liquefied petroleum gas in the steel cylinder exceeds a threshold value, the overflowing self-closing assembly cuts off a gas flow channel, according to the liquefied petroleum gas cylinder valve, a self-closing mechanism arranged in a gas outlet of a cylinder valve of a traditional valve body is abandoned, and the liquefied petroleum gas cylinder valve is limited by the structure of the self-closing mechanism; the sealing surface between the self-closing mechanism and the pressure reducing valve connector is small, the risk of liquefied petroleum gas leakage is increased, the safety device is arranged in the cylinder valve gas outlet, the sealing surface between the cylinder valve gas outlet and the pressure reducing valve connector is large, and sealing of the joint between the cylinder valve gas outlet and the pressure reducing valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied petroleum gas cylinder valves, and specifically relates to a liquefied petroleum gas cylinder valve. Background Technique

[0002] According to the provisions of GB 7512-2023 "Liquefied Petroleum Gas Cylinder Valve", in order to ensure the safety of liquefied petroleum gas cylinder valves, safety devices must be installed inside the liquefied petroleum gas cylinder valves (note: in addition, in standard clause 5.7, valves with flow self-closing are allowed not to have self-closing devices at the gas outlet) to ensure that the gaseous channels of the liquefied petroleum gas cylinder valves do not leak. Therefore, existing liquefied petroleum gas cylinder valves are as Figure 1 shown, including a valve body 1'. The valve body 1' forms a gaseous channel. The lower end of the gaseous channel is the cylinder valve inlet 2' for connecting to the steel cylinder. The side of the valve body 1' is provided with a cylinder valve outlet 3' for connecting to the pressure reducing valve of the steel cylinder. An automatic closing mechanism is installed inside the cylinder valve outlet 3' to make the valve body 1' have an automatic closing function, and gas will only be discharged after the pressure reducing valve is installed. However, after installing the automatic closing mechanism, the sealing surface 22' is greatly reduced, increasing the leakage points for connecting to the pressure reducing valve. Although there is a double protection of the pressure reducing valve, due to the wide application of liquefied petroleum gas and a large number of customer groups, especially for the elderly, when considering the situation that the leakage warning of the pressure reducing valve is not detected or ignored, the liquefied petroleum gas cylinder valve can still be further improved to enhance the safety of the valve body. Content of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a liquefied petroleum gas cylinder valve, which solves the problems raised in the above background technique.

[0005] (II) Technical Solutions

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: a liquefied petroleum gas cylinder valve, including a valve body. An air flow channel is formed inside the valve body. One end of the air flow channel is the cylinder valve inlet, which is connected to the steel cylinder. The other end of the air flow channel is the cylinder valve outlet, which is connected to the pressure reducing valve. A valve core is provided inside the valve body to open and close the valve. An overcurrent automatic closing component is provided inside the cylinder valve inlet. When the outlet flow rate of liquefied petroleum gas in the steel cylinder exceeds the threshold, the overcurrent automatic closing component cuts off the air flow channel.

[0007] Preferably, an air inlet cavity, a valve cavity, a valve core cavity, and an air outlet cavity are respectively formed inside the valve body;

[0008] The overcurrent automatic closing component is arranged in the air inlet cavity, and the overcurrent automatic closing component opens and closes the lower valve port of the valve cavity; the valve core is arranged in the valve core cavity, and the valve core opens and closes the upper valve port of the valve cavity.

[0009] Preferably, the overcurrent self-closing component includes a fixing member and a top shaft. Gas flows through the fixing member, and the fixing member is fixedly arranged on the inner wall of the intake cavity. The top shaft is slidably connected to the fixing member. A blocking block is sleeved on the upper end of the top shaft, and a spring is arranged between the top shaft and the fixing member. When the gas outlet flow rate of liquefied petroleum gas in the cylinder exceeds the threshold value, the upward thrust generated by the air flow on the blocking block exceeds the frictional resistance of the spring and the blocking block, and the blocking block moves upward along with the top shaft to block the lower valve port of the valve cavity.

[0010] Preferably, a gas release component is further arranged in the valve body. A pin cavity is opened on the side of the valve cavity, and the gas release component is accommodated in the pin cavity. The gas release component can prevent the overcurrent self-closing component from closing the valve.

[0011] The gas release component includes a screw sleeve and a gas release pin. The outer circumference of the screw sleeve is threadedly connected to the inner wall of the pin cavity, and the gas release pin is slidably connected to the screw sleeve.

[0012] Preferably, double O-ring seals are arranged on the outer circumference of the gas release pin that slides with the inner wall of the pin cavity.

[0013] Preferably, the valve core includes a valve stem and an opening valve. The valve stem is engaged in the valve core cavity through a compression nut. The valve stem and the opening valve are connected by a connecting block. A cushion block is arranged under the opening valve. A handwheel is arranged on the valve stem. When the valve stem rotates under the handwheel, the opening valve is driven to move to open or close the valve.

[0014] Preferably, a self-closing release component is further included. The self-closing release component can release the self-closing state of the overcurrent self-closing component and make it in an open state.

[0015] Preferably, the self-closing release component includes a thimble. The thimble is arranged at the lower end of the cushion block. When the handwheel rotates, the thimble moves downward and abuts against the top shaft, causing the top shaft to move downward, so that the air pressures in the intake cavity and the valve cavity are balanced, and the self-closing state of the overcurrent self-closing component is released by the spring force.

[0016] (III) Beneficial effects

[0017] The utility model provides a liquefied petroleum gas cylinder valve, which has the following beneficial effects:

[0018] 1. For this liquefied petroleum gas cylinder valve, the self-closing mechanism arranged in the gas outlet of the traditional valve body is abandoned. Limited by the structure of the self-closing mechanism, that is, the cooperation form of the wire sleeve and the ejector rod, the sealing surface between the wire sleeve and the pressure reducing valve interface is small, increasing the risk of liquefied petroleum gas leakage. Instead, the safety device is arranged in the gas outlet of the valve body. The sealing surface between the gas outlet of the valve body and the pressure reducing valve interface is large, improving the sealing performance at the connection between the gas outlet of the valve body and the pressure reducing valve.

[0019] 2. The safety device of the liquefied petroleum gas cylinder valve is an over-current self-closing component, which includes a fixing part and a top shaft. The fixing part is fixedly arranged at the air inlet of the cylinder valve, and the top shaft is slidably connected to the fixing part. A spring is arranged between the top shaft and the fixing part. When the outlet flow rate of the liquefied petroleum gas in the cylinder exceeds the pressure threshold, the over-current self-closing component closes the valve to play an over-current protection role.

[0020] 3. The liquefied petroleum gas cylinder valve is provided with a venting assembly in the valve body, and a pin cavity is provided on the side of the valve cavity, in which the venting assembly is placed, and the venting assembly includes a self-closing assembly that can prevent over-flow from closing the valve, and is used in the over-flow venting state or residual extraction state after the cylinder air tightness test; at the same time, a self-closing release assembly is also provided in the valve body, and the self-closing release assembly includes a ejector pin, which is arranged at the lower end of the cushion block, and the ejector pin moves downward when the hand wheel is turned, and stops on the ejector shaft, so that the ejector shaft moves downward, so that the air pressure in the air inlet cavity and the valve cavity is balanced, and the self-closing state of the over-flow self-closing assembly is released by the spring force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an existing liquefied petroleum gas cylinder valve;

[0022] Figure 2 This is a schematic diagram of the open state of an over-current self-closing component of a liquefied petroleum gas cylinder valve of the utility model;

[0023] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A;

[0024] Figure 4 This is a schematic diagram of the valve inflation state of a liquefied petroleum gas cylinder valve of the utility model;

[0025] Figure 5 This is a schematic diagram of the working of the vent pin of a liquefied petroleum gas cylinder valve of the utility model Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the working of the vent pin of a liquefied petroleum gas cylinder valve of the utility model Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the over-flow starting state of a liquefied petroleum gas cylinder valve of the utility model;

[0028] Figure 8 This is a schematic diagram of the over-current self-closing state of a liquefied petroleum gas cylinder valve of the utility model;

[0029] Figure 9 The utility model is a schematic diagram of a valve of a liquefied petroleum gas cylinder being released from the self-closing start state.

[0030] In the figure: 1. valve body; 2. bottle valve air inlet; 3. bottle valve air outlet; 4. air inlet chamber; 5. valve chamber; 6. valve core chamber; 7. air outlet chamber; 8. fixing piece; 9. ejector shaft; 10. blocking block; 11. spring; 12. pin chamber; 13. screw sleeve; 14. bleed pin; 15. O-ring; 16. valve stem; 17. opening valve; 18. connecting block; 19. spacer; 20. hand wheel; 21. ejector pin; 22. sealing surface; 23. thread below valve; 24. clamping nut; 25. screw sleeve; 26. ejector rod; 27. conical compression spring. DETAILED DESCRIPTION

[0031] According to the provisions of GB7512-2023 "Liquefied Petroleum Gas Cylinder Valve", in order to ensure the safety of the liquefied petroleum gas cylinder valve, a safety device must be installed in the liquefied petroleum gas cylinder valve to ensure that the gaseous channel of the liquefied petroleum gas cylinder valve does not leak. For this reason, the existing liquefied petroleum gas cylinder valves such as Figure 1 As shown, it includes a valve body 1', the valve body 1' is formed with a gaseous channel, the lower end of the gaseous channel is a bottle valve gas inlet 2', which is used to connect a steel cylinder, and the side of the valve body 1' is provided with a bottle valve gas outlet 3', which is used to connect the pressure reducing valve of the steel cylinder, and a self-closing mechanism is installed in the bottle valve gas outlet 3', so that the valve body 1' has a self-closing function, and gas can be discharged only when the pressure reducing valve is installed;

[0032] like Figure 1 As shown, the self-closing mechanism in the traditional valve body 1 includes a threaded sleeve 25 and a push rod 26. The threaded sleeve 25 is connected to the bottle valve outlet 3' and is sealed with an O-ring 15 and a sealing gasket. The push rod 26 is slidably connected to the threaded sleeve 25. A sealing seat is arranged at the rear end of the push rod 26, and a sealing seat cushion is arranged on the sealing seat. A conical compression spring 27 is arranged between the rear end of the sealing seat and the valve body 1'. After the valve air tightness test is qualified, the threaded sleeve 25 is punched and riveted, and copper chips are not allowed to enter the outlet. When the pressure reducing valve is not connected, the sealing seat cushion is stopped at the rear side of the threaded sleeve 25 under the elastic force of the conical compression spring 27, which is in a self-closing state. When the pressure reducing valve is connected, the push rod 26 is pushed back, the sealing seat cushion is separated from the side of the threaded sleeve 25, and the self-closing state is opened.

[0033] For example Figure 2 The sealing surface 22 is limited by the matching structure of the thread sleeve 25 and the push rod 26, such as Figure 1 In the self-closing mechanism shown in the figure, the sealing surface 22 is greatly reduced, and the leakage point connected to the pressure reducing valve is increased. Although there is a double protection of the external pressure reducing valve, due to the wide application of liquefied petroleum gas and a large customer base, especially for the elderly, it is necessary to consider the situation that the pressure reducing valve leakage warning is not detected or ignored. Therefore, the utility model continues to improve the traditional liquefied petroleum gas cylinder valve and further enhances the safety of the valve body 1'.

[0034] The utility model provides a liquefied petroleum gas cylinder valve, such asFigure 2-9 As shown in the figure, the technical solution of the present utility model includes a valve body 1. An air flow channel is formed inside the valve body 1. One end of the air flow channel is a cylinder valve air inlet 2, which is connected to a steel cylinder, and the other end of the air flow channel is a cylinder valve air outlet 3, which is connected to a pressure reducing valve. A valve core is provided inside the valve body 1 to open and close the valve. An overcurrent self-closing component is provided inside the cylinder valve air inlet 2. When the gas outlet flow rate of liquefied petroleum gas in the steel cylinder exceeds the threshold value, the overcurrent self-closing component cuts off the air flow channel.

[0035] The air flow channels inside the valve body 1 are respectively composed of an air inlet chamber 4, a valve chamber 5, a valve core chamber 6, and an air outlet chamber 7. Blocking any one of the chambers can achieve the function of cutting off the air flow channel. Therefore, the safety device is arranged inside the cylinder valve air inlet 2 instead of being arranged inside the cylinder valve air outlet 3 in the traditional valve body 1.

[0036] Judging from the nature, the installation device in this case is an overcurrent self-closing component. As Figure 8-9 shown, this overcurrent self-closing component is arranged inside the air inlet chamber 4. As Figure 3 shown, the overcurrent self-closing component opens and closes the lower valve port of the valve chamber 5; the valve core is arranged inside the valve core chamber 6, and the valve core opens and closes the upper valve port of the valve chamber 5.

[0037] In Embodiment 1, the overcurrent self-closing component in this case includes a fixing member 8 and a top shaft 9. Gas normally flows through the fixing member 8. The function of the fixing member 8 is to fixedly connect the overcurrent self-closing component as a whole inside the air inlet chamber 4. Therefore, when the overcurrent self-closing component is installed as a whole, a top shaft 9 is passed through the center of the fixing member 8. A spring 11 is arranged between the top shaft 9 and the fixing member 8. A sealing block 10 is sleeved on the upper end of the top shaft 9. Preferably, the fixing member 8 can be a screw sleeve 13. A threaded hole is pre-opened inside the air inlet chamber 4, and the outer thread of the screw sleeve 13 is threadedly connected to the threaded hole. The upper end of the top shaft 9 is provided with a conical table surface, and the sealing block 10 is sleeved on the top shaft 9 at the lower end of the conical table surface, and the sealing block 10 is fixed with an elastic piece. When the gas outlet pressure of liquefied petroleum gas in the steel cylinder exceeds the threshold value, the sealing block 10 moves upward along with the top shaft 9 to block the lower valve port of the valve chamber 5. The sealing block 10 is preferably a sealing seat.

[0038] Furthermore, a gas release component is also arranged inside the valve body 1. A pin chamber 12 is opened on the side of the valve chamber 5, and the gas release component is accommodated inside the pin chamber 12. The gas release component includes a component that can prevent the overcurrent self-closing component from closing the valve; it is used for the overcurrent gas release state or the residual gas pumping state of the valve body 1 after the airtightness detection of the steel cylinder.

[0039] In the embodiment of this case, the gas release component includes a screw sleeve 13 and a gas release pin 14. The outer thread of the screw sleeve 13 is threadedly connected to the inner wall of the pin chamber 12, and the gas release pin 14 is slidably connected to the screw sleeve 13.

[0040] To improve the sealing performance of the pin cavity 12, preferably, a double O-ring seal 15 is provided on the outer circle of the air release pin 14 that slides on the inner wall of the pin cavity 12, as Figure 3 , 4 , as shown in Figures 7, under normal conditions, due to the air flow pressure in the valve cavity 5, the air release pin 14 is pushed to the outer end, and due to the stepped shaft of the air release pin 14, the air release pin 14 cannot be pulled outwards.

[0041] As Figure 2 shown, the valve core belongs to the prior art and includes a valve stem 16 and an opening valve 17. The valve stem 16 is engaged in the valve core cavity 6 through a compression nut 24. The valve stem 16 and the opening valve 17 are connected by a connecting block 18. A cushion block 19 is provided under the opening valve 17. A handwheel 20 is provided on the valve stem 16. When the handwheel 20 rotates, the valve stem 16 drives the opening valve 17 to move to open and close the valve. Its working principle is that when the handwheel 20 is rotated, the handwheel 20 drives the valve stem 16 to rotate on the stroke screw, driving the connecting block 18 and the opening valve 17 to move up and down, thereby opening and closing the valve.

[0042] Furthermore, it further includes an automatic closing release component, which can release the automatic closing state of the overcurrent automatic closing component and make it in an open state.

[0043] As Figure 9 shown, the automatic closing release component in the embodiment of this case includes a thimble 21. The thimble 21 is arranged at the lower end of the cushion block 19. When the handwheel 20 rotates, the thimble 21 moves downwards and abuts against the top shaft 9, causing the top shaft 9 to move downwards, making the air pressure in the air inlet cavity 4 and the valve cavity 5 balanced, and releasing the automatic closing state of the overcurrent automatic closing component through the spring force, so that it can be used normally.

[0044] Working principle: When the liquefied petroleum gas cylinder valve is in use,

[0045] 1. In the natural state as Figure 2 shown, the cylinder valve air inlet 2 of the valve body 1 is hermetically connected to the steel cylinder through the thread below the valve. The liquefied petroleum gas cylinder valve is in the state of valve closed and overcurrent automatic closing open;

[0046] 2. In the gas filling state as Figure 4 shown, the liquefied petroleum gas cylinder valve is in the valve gas filling state: The cylinder valve outlet 3 is connected to the gas filling equipment. The handwheel 20 is rotated, the valve is opened, and the gas filling equipment fills the steel cylinder through the valve body 1. The blocking block 10 moves downwards under the air pressure, and the valve port at the lower end of the valve cavity 5 remains unblocked. As shown by the arrow 4, the air flow flows from the valve into the steel cylinder;

[0047] 3. After the airtightness test of the steel cylinder, in the overcurrent air release state or the residual gas pumping state as Figure 5As shown in Figure 6, when over - flow deflation or evacuation of residues is required, as shown in the figure, move the deflation pin 14 inward. The deflation pin 14 lies across the upper end of the top shaft 9. As shown in the figure, the air flow flows from bottom to top, and the deflation pin 14 blocks the closing of the self - closing component;

[0048] 4. In the closed state of the liquefied petroleum gas valve, as Figure 2 shown. At this time, the air flow pressure is balanced with the threshold value of the over - flow self - closing component. The over - flow self - closing is in the open state, and the deflation pin 14 is in the outward - pushing state;

[0049] 5. At the beginning of the over - flow of liquefied petroleum gas, as Figure 7 shown, the upper valve orifice of the valve cavity 5 is in the open state, and the air flow continuously flows upward;

[0050] 6. In the over - flow self - closing state of the valve, as Figure 8 shown, the upper valve orifice of the valve cavity 5 is in the open state. When the air flow rate exceeds the threshold value, the air flow drives the blocking block 10 to move upward, blocking the lower valve orifice of the valve cavity 5. At this time, the top shaft 9 and the top pin 21 are not in contact;

[0051] 7. In the state where the self - closing of the valve is released, as Figure 9 shown, rotate the handwheel 20, drive the top pin 21 to move downward. The top pin 21 contacts the head of the top shaft 9, pushing open the top shaft 9, making the air pressure above and below the over - flow self - closing component balanced. Due to the spring force, the over - flow self - closing component is in the open state;

[0052] 8. When entering the normal flow state, if the air flow is excessive again, the over - flow self - closing component will be triggered again.

[0053] To sum up

[0054] 1. This liquefied petroleum gas cylinder valve abandons the self - closing mechanism arranged in the valve outlet 3 of the traditional valve body 1. Limited by the cooperation form of the wire sleeve 25 and the ejector rod 26, it has the disadvantage of greatly reducing the sealing surface between the wire sleeve 25 and the pressure - reducing valve interface 22, increasing the risk of leakage. Innovatively, the safety device is set in the valve outlet 3 of the cylinder valve, greatly increasing the sealing surface between the original valve outlet 3 of the cylinder valve and the pressure - reducing valve interface 22, improving the sealing performance.

[0055] 2. The safety device of this liquefied petroleum gas cylinder valve is an over - flow self - closing component, including a fixing part 8 and a top shaft 9. The fixing part 8 is fixedly arranged at the gas inlet 2 of the cylinder valve. The top shaft 9 is slidably connected to the fixing part 8. A spring 11 is arranged between the top shaft 9 and the fixing part 8. When the outlet pressure of the liquefied petroleum gas in the steel cylinder exceeds the pressure threshold value, the over - flow self - closing component closes the valve, playing a role in over - flow protection.

[0056] 3. For this liquefied petroleum gas cylinder valve, a gas release assembly is further provided inside the valve body 1. A pin cavity 12 is opened on the side of the valve cavity 5, and the gas release assembly is placed inside the pin cavity 12. The gas release assembly includes a component that can prevent the overcurrent self-closing component from closing the valve and is used for the over-flow gas release state or the residual gas pumping state. At the same time, a self-closing release assembly is also provided inside the valve body 1. The self-closing release assembly includes a thimble 21, which is placed at the lower end of the cushion block 19. When the handwheel 20 rotates, the thimble 21 moves downward and abuts against the top shaft 9, causing the top shaft 9 to move downward, so that the air pressure in the air inlet cavity 4 and the valve cavity 5 is balanced, and the self-closing state of the overcurrent self-closing component is released.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquefied petroleum gas cylinder valve, comprising a valve body (1), wherein an air flow channel is formed in the valve body (1), wherein one end of the air flow channel is a cylinder valve air inlet (2) connected to a steel cylinder, and the other end of the air flow channel is a cylinder valve air outlet (3) connected to a pressure reducing valve, wherein a valve core is provided in the valve body (1) to open and close the valve, and wherein: The cylinder valve air inlet (2) is provided with an over-flow self-closing component inside, and when the outlet flow rate of the liquefied petroleum gas in the cylinder exceeds a threshold value, the over-flow self-closing component cuts off the air flow channel; The valve body (1) is provided with an air inlet cavity (4), a valve cavity (5), a valve core cavity (6) and an air outlet cavity (7). The over-current self-closing component is arranged in the air inlet cavity (4), and the over-current self-closing component opens and closes the valve port at the lower end of the valve cavity (5); the valve core is arranged in the valve core cavity (6), and the valve core opens and closes the valve port at the upper end of the valve cavity (5); The over-current self-closing component comprises a fixing part (8) and a top shaft (9), gas flows on the fixing part (8), the fixing part (8) is fixedly arranged on the inner wall of the air inlet cavity (4), the top shaft (9) is slidably connected to the fixing part (8), a blocking block (10) is sleeved on the upper end of the top shaft (9), a spring (11) is arranged between the top shaft (9) and the fixing part (8), and when the outlet flow rate of liquefied petroleum gas in the cylinder exceeds a threshold value, the blocking block (10) moves upward along with the top shaft (9) to block the valve port at the lower end of the valve cavity (5).

2. A liquefied petroleum gas cylinder valve according to claim 1, characterized in that: The valve body (1) is also provided with a deflation component, a pin cavity (12) is provided on the side of the valve cavity (5), and the deflation component is accommodated in the pin cavity (12), and the deflation component includes a self-closing component that can prevent over-flow and close the valve; The degassing assembly comprises a screw sleeve (13) and a degassing pin (14). The outer circle of the screw sleeve (13) is connected to the inner wall of the pin cavity (12) by a thread, and the degassing pin (14) is slidably connected to the screw sleeve (13).

3. A liquefied petroleum gas cylinder valve according to claim 2, characterized in that: A double-pass O-type sealing ring (15) is arranged on the outer circle of the air release pin (14) sliding with the inner wall of the pin cavity (12).

4. A liquefied petroleum gas cylinder valve according to claim 1, characterized in that: The valve core comprises a valve stem (16) and an opening valve (17). The valve stem (16) is engaged in the valve core cavity (6) through a clamping nut (24). The valve stem (16) and the opening valve (17) are connected through a connecting block (18). A cushion block (19) is provided under the opening valve (17). A hand wheel (20) is provided on the valve stem (16). When the hand wheel (20) is rotated, the valve stem (16) drives the opening valve (17) to move so as to open and close the valve.

5. A liquefied petroleum gas cylinder valve according to claim 4, characterized in that: It also includes a self-closing release component, which can release the self-closing state of the overcurrent self-closing component and put it in an open state.

6. A liquefied petroleum gas cylinder valve according to claim 5, characterized in that: The self-closing release component comprises a pin (21) which is arranged at the lower end of the cushion block (19). When the hand wheel (20) is turned, the pin (21) moves downward and stops on the top shaft (9), so that the top shaft (9) moves downward, balances the air pressure in the air inlet chamber (4) and the valve chamber (5), and releases the self-closing state of the over-current self-closing component through the force of the spring.

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