Gas safety valve

Abstract

The utility model relates to a gas pipeline valve, in particular to a gas safety valve which comprises a valve opening hand wheel, a shell and a timer, a rotating shaft, a valve handle shaft and an incomplete gear are arranged in the shell in a matched mode, the valve opening hand wheel and the valve handle shaft are of an integrated mechanism, and the gas safety valve further comprises a safety pin assembly, a rotating shaft positioning plate and an electromagnetic coil. A safety pin assembly is arranged on the outer side of the lower portion of the shell and comprises a safety pin, a safety pin outer sleeve, a safety pin outer sleeve buckle cap and a safety pin pop-up spring. One end of the safety pin extends into a safety pin groove in the rotating shaft positioning plate in the shell; the other end of the safety pin is arranged in the safety pin jacket, and a safety pin pop-up spring is sleeved outside the part of the safety pin; and the safety pin outer sleeve buckle cap is buckled at the outer end of the safety pin outer sleeve. The device is simple in overall structure, easy to operate, low in cost and easy to install; time and labor are saved, and safety is improved.

Description

Technical Field

[0001] The utility model relates to a gas pipeline valve, in particular to a gas safety valve which can be closed according to a preset time and can be automatically closed under specific circumstances. Background Art

[0002] Liquefied gas or natural gas is an indispensable energy source in family life. For the convenience of use, the pipelines of liquefied gas or natural gas are directly extended into the home for users to use. Therefore, in addition to convenience, there are also serious safety hazards. Especially when the elderly use it, various safety accidents often occur because they forget to close the valve.

[0003] In order to improve the safety of liquefied gas or natural gas, many valves with timing functions or automatic closing functions have appeared. However, these valves are either complicated to operate and inconvenient to use; or they are complex in structure, difficult to install or prone to failure, and have poor practicality. In addition, most of the current safety valves have a timing function and can only be automatically closed after the preset time is reached. The closing function is a passive closing function, and there is no function to actively monitor safety hazards and take timely measures. Utility Model Content

[0004] The utility model aims at the technical defects mentioned in the background technology and provides a gas safety valve which not only has a timed closing function but also can realize automatic closing when the flame of the gas stove is accidentally extinguished or gas leakage occurs.

[0005] The technical solution adopted to achieve the above technical purpose is: a gas safety valve, including a valve opening hand wheel, a housing and a timer, wherein a rotating shaft, a valve handle shaft and an incomplete gear are arranged inside the housing, the valve opening hand wheel and the valve handle shaft are an integrated mechanism, and also include a safety pin assembly, a rotating shaft positioning plate and an electromagnetic coil, and a gas leakage alarm explosion-proof switch;

[0006] The valve opening hand wheel is installed outside the housing;

[0007] The valve opening hand wheel is sleeved on the upper section of the rotating shaft; the incomplete gear is sleeved on the middle section of the rotating shaft, and a rotating shaft positioning plate is arranged between the rotating shaft and the inner side of the shell; the rotating shaft is sleeved on the outside of the valve handle shaft, an electromagnetic coil is arranged on the inner side of the lower part of the shell, and the lower section of the valve handle shaft passes through the center of the electromagnetic coil; the lower end of the valve handle shaft is sleeved on the valve shaft;

[0008] A handwheel positioning rod connected to the valve opening handwheel is arranged on the incomplete gear; a pressing column hole is also arranged on the incomplete gear, and a pressing column assembly is arranged in the pressing column hole; the incomplete gear is meshed with the timer gear through the intermediate gear for transmission;

[0009] A locking pin hole is provided on the middle section of the rotating shaft, and a locking pin assembly is provided in the locking pin hole; the locking pin assembly is aligned and in contact with the pressing column assembly;

[0010] A safety pin assembly is arranged on the outer side of the lower part of the shell, including a safety pin, a safety pin sleeve, a safety pin sleeve buckle cap and a safety pin pop-up spring; one end of the safety pin extends into the safety pin groove on the rotating shaft positioning plate in the shell; the other end of the safety pin is placed in the safety pin sleeve, and a safety pin pop-up spring is arranged on the outside of this part of the safety pin; the safety pin sleeve buckle cap is buckled on the outer end of the safety pin sleeve.

[0011] As an optimal technical solution: the valve opening handwheel is sleeved on the front section of the rotating shaft, and a positioning rod hole is provided behind the valve opening handwheel; the positioning rod hole corresponds to the handwheel positioning rod; a handwheel reset spring used in conjunction with the handwheel positioning rod is installed in the positioning rod hole.

[0012] As a preferred technical solution: a through hole is set in the center of the rotating shaft, and the valve handle shaft is inserted into the through hole; a handle reset spring is sleeved on the outer periphery of the front section of the valve handle shaft, and the handle reset spring is installed in the rotating shaft; the lower end of the valve handle shaft is slidingly connected to the valve shaft, and a bayonet is set in the middle section of the valve handle shaft, and the bayonet cooperates with the slot on the rotating shaft.

[0013] As an optimal technical solution: the pressing column assembly includes a pressing column and a pressing column reset spring, and the pressing column is inserted into the pressing column hole; a reducing shoulder is arranged in the pressing column hole, and a large-diameter column cap is arranged at the upper end of the pressing column, and a pressing column reset spring is sleeved on the pressing column on the upper side of the reducing shoulder.

[0014] As a preferred technical solution: the locking pin assembly includes a locking pin and a locking pin reset spring, and the locking pin is inserted into the locking pin hole; the locking pin hole is a reducing hole with a larger top and a smaller bottom, a large-diameter column cap is arranged at the upper end of the locking pin, and a locking pin reset spring is sleeved on the locking pin.

[0015] As a preferred technical solution: the rotating shaft positioning plate is arranged at the lower section of the rotating shaft; a safety pin groove is arranged on the outer circumference of the rotating shaft positioning plate, and the end of the safety pin is inserted into the safety pin groove; a locking pin countersunk hole is arranged on the rotating shaft positioning plate on the opposite side of the safety pin groove, and the locking pin countersunk hole is aligned with the locking pin hole; the lower end of the locking pin matches the locking pin countersunk hole.

[0016] As a preferred technical solution: paraffin is filled between the buckle cap of the safety pin sleeve and the safety pin sleeve to achieve compression of the safety pin.

[0017] As a preferred technical solution: a square hole is provided at the lower end of the valve handle shaft, a square valve shaft is inserted into the square hole, and a cam for controlling the circuit switch and a spring for controlling the automatic closing of the valve are sleeved on the valve shaft.

[0018] As a preferred technical solution: it also includes a control mechanism, which includes a line switch, a time relay, a temperature controller, and a thermocouple; the time relay and the temperature controller are installed on the outside of the shell, and when the cam touches the line switch in the control mechanism, the time relay is energized; after the set time is reached, the internal switch of the time relay is closed and the temperature controller is turned on; when the thermocouple detects that the temperature value of the gas stove is lower than the set temperature, the temperature controller connects the circuit, the coil is energized, and the valve is closed.

[0019] As a preferred technical solution: a gas alarm switch connected to a control mechanism is arranged in the space above the safety valve; the gas alarm switch is an explosion-proof switch, which can detect gas leakage, sound an alarm and turn on the leakage switch, so that the coil is energized and the valve is closed.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] 1. The safety valve has a simple overall structure, easy operation, low cost and easy installation;

[0022] 2. After manually opening the valve, you can set the time as needed. When the timer reaches the preset time, the valve will automatically close, saving time and effort and improving safety.

[0023] 3. When the gas stove is turned off due to special circumstances, the valve will automatically close in a short time to improve safety performance;

[0024] 4. If a fire or explosion occurs near the valve, the ambient temperature will suddenly rise, and the safety cap will automatically fall off under the high temperature. Under the action of the safety pin assembly, the valve will automatically close, reducing the chance of another explosion and improving safety performance;

[0025] 5. When the gas leak alarm detects the predetermined gas concentration, it will continue to sound the alarm and the valve will automatically close to avoid danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the incomplete gear structure in the present invention.

[0028] Figure 3 It is a cross-sectional view of an incomplete gear in the present invention.

[0029] Figure 4 It is a schematic diagram of the valve opening hand wheel structure in the present invention.

[0030] Figure 5 It is a cross-sectional view of the valve opening hand wheel in the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the rotating shaft positioning plate in the present invention.

[0032] Figure 7 It is a cross-sectional view of the handle shaft in the present invention.

[0033] Figure 8 It is a cross-sectional view of the handle shaft in another direction of the present invention.

[0034] Fig. 9 It is a schematic diagram of the rotating shaft structure in the present invention.

[0035] Fig.10 This is the circuit diagram of the control mechanism in the present invention.

[0036] In the figure: valve 1, housing 2, valve automatic closing spring 3, square valve shaft 4, electromagnetic coil 5, valve handle shaft 6, rotating shaft 7, handle shaft positioning sleeve 8, handle reset spring 9, valve opening handwheel 10, handwheel reset spring 11, incomplete gear 12, handwheel positioning rod 13, pressing column 14, pressing column reset spring 15, locking pin 16, locking pin reset spring 17, rotating shaft reset spring 18, safety pin sleeve buckle cap 19, safety pin sleeve 20, safety pin ejection spring 21, safety pin 22, rotating shaft positioning plate 23, intermediate gear shaft 24, intermediate gear 25, timer gear 26, timer shaft 27, timer 28, time relay 29, temperature controller 30, cam 31, snap ring 32, valve handle shaft snap pin 33, locking pin countersunk hole 34, safety pin groove 35, timer shaft spring 36, positioning rod hole 37, snap groove 38, control mechanism 39. DETAILED DESCRIPTION

[0037] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0038] See attached Figure 1-9 This gas safety valve is an innovative improvement made on the basis of the existing safety valve, including a valve opening handwheel 10, a housing 2 and a timer 28. The interior of the housing 2 is provided with a rotating shaft 7, a rotating shaft positioning plate 23, a valve handle shaft 6 and an incomplete gear 12, and the valve opening handwheel 10 is installed on the outside of the housing 2.

[0039] The valve opening handwheel 10 is sleeved on the upper section of the rotating shaft 7; the incomplete gear 12 is sleeved on the middle section of the rotating shaft 7, and a rotating shaft positioning plate 23 is provided between the rotating shaft 7 and the inner side of the housing 2. A part of the outer circumference of the incomplete gear 12 has teeth, and a part has no teeth, and a through hole is provided in the center. A handwheel positioning rod 13 connected to the valve opening handwheel is provided on the incomplete gear 12. The rotating shaft 7 is sleeved on the outside of the valve handle shaft 6, and an electromagnetic coil 5 is sleeved on the lower section of the valve handle shaft 6. The valve opening handwheel 10 is sleeved on the front section of the rotating shaft 7, and a positioning rod hole 37 is provided at the back of the valve opening handwheel 10. The positioning rod hole 37 corresponds to the handwheel positioning rod 13. A handwheel reset spring 11 used in conjunction with the handwheel positioning rod 13 is installed in the positioning rod hole 37. A through hole is provided in the center of the rotating shaft 7, and the valve handle shaft 6 is inserted into the through hole; a handle reset spring 9 and a handle shaft positioning sleeve 8 are sleeved on the outer periphery of the front section of the valve handle shaft 6, and the handle reset spring 9 is located in the rotating shaft 7; the lower end of the valve handle shaft 6 is movably connected with the valve shaft 4, and a cam 31 and an automatic closing spring 3 are provided on the valve shaft 4. A retaining ring 32 is sleeved on the outer wall of both ends of the rotating shaft, respectively, to play a limiting role. A bayonet 33 is provided on the valve handle shaft 6, and a slot 38 is provided at the lower end of the rotating shaft. The bayonet 33 cooperates with the slot 38 on the rotating shaft to realize the synchronous linkage or independent rotation of the valve handle shaft 6 and the rotating shaft 7.

[0040] A pressing column hole 12-1 is also provided on the incomplete gear 12, and a pressing column assembly is provided in the pressing column hole 12-1. The incomplete gear 12 is meshed with the timer gear 26 through the intermediate gear 25 for transmission. As a preferred solution, the pressing column assembly includes a pressing column 14 and a pressing column reset spring 15, and the pressing column 14 is inserted into the pressing column hole 12-1; a reducing shoulder is provided in the pressing column hole 12-1, and a column cap with a large diameter is provided at the upper end of the pressing column 14. A pressing column reset spring 15 is sleeved on the pressing column 14 on the upper side of the reducing shoulder. The column cap at the upper end of the pressing column 14 contacts the bottom surface of the valve opening hand wheel 10 to achieve top pressure.

[0041] A locking pin hole 7-1 is provided on the middle section of the rotating shaft 7, and a locking pin assembly is provided in the locking pin hole 7-1. As a preferred technical solution, the locking pin assembly includes a locking pin 16 and a locking pin reset spring 17, and the locking pin 16 is inserted into the locking pin hole 7-1; the locking pin hole 7-1 is a stepped diameter-reducing hole with a larger diameter at the top and a smaller diameter at the bottom, and a large-diameter column cap is provided at the upper end of the locking pin 16, and a locking pin reset spring 17 is sleeved on the locking pin 16 placed at the upper part of the locking pin hole 7-1. The locking pin assembly is aligned and in contact with the pressing column assembly. The column cap at the upper end of the locking pin contacts the lower end of the pressing column to achieve top pressure.

[0042] A safety pin assembly is arranged on the outer side of the lower part of the shell 2, including a safety pin 22, a safety pin sleeve 20, a safety pin sleeve buckle cap 19 and a safety pin pop-up spring 21. One end of the safety pin 22 extends into the safety pin groove 35 on the rotating shaft positioning plate 23 in the shell 2. The other end of the safety pin 22 is placed in the safety pin sleeve 20, and the safety pin pop-up spring 21 is sleeved on the outside of this part of the safety pin 22; the safety pin sleeve buckle cap 19 is buckled on the outer end of the safety pin sleeve 20. Paraffin is filled between the safety pin sleeve buckle cap 19 and the safety pin sleeve 20 to achieve compression of the safety pin 22. Alternatively, other materials with a melting point slightly higher than the highest normal temperature can also be filled between the safety pin sleeve buckle cap 19 and the safety pin sleeve 20. Under normal conditions, this material is mainly used to fill the space to achieve top pressure on the safety pin. When the external environment temperature rises, this material is melted at high temperature and then the safety pin is opened. Different filling materials can be selected in different seasons and regions, such as rosin, asphalt, etc.

[0043] As a preferred solution, in order to improve thermal conductivity, the safety pin outer sleeve buckle cap 19 is made of a conductor material with good thermal conductivity, such as copper, aluminum, etc.

[0044] As a preferred embodiment, the rotating shaft positioning plate 23 is arranged between the large diameter section of the middle section of the rotating shaft 7 and the housing 2. A boss is provided in the center of the housing, which stabilizes the rotating shaft 7, and the rotating shaft positioning plate is sleeved on the boss. A safety pin groove 35 is provided on the outer circumference of the rotating shaft positioning plate 23, and the end of the safety pin 22 is inserted into the safety pin groove 35; a locking pin countersunk hole 34 is provided on the rotating shaft positioning plate on the opposite side of the safety pin groove 35, and the locking pin countersunk hole 34 is aligned with the locking pin hole 7-1; the lower end of the locking pin 16 matches the locking pin countersunk hole 34, and when the two are aligned, the locking pin 16 falls into the locking pin countersunk hole 34 under the pressure of the pressing column 14 and the valve opening hand wheel 10 to achieve locking.

[0045] As a preferred technical solution: a square hole is provided at the lower end of the valve handle shaft 6, and a square valve shaft 4 is inserted into the square hole. A cam 31 for controlling the circuit switch and a valve automatic closing spring 3 are sleeved on the valve shaft 4.

[0046] The utility model also includes a control mechanism 39, which includes a circuit switch 39-1, a time relay 29, a temperature controller 30, a leakage switch 39-2, an electromagnetic coil 5 and a thermocouple. When the cam 31 touches the circuit switch 39-1 in the control mechanism, the time relay 29 is energized; when the set time is reached (the set time is a delay time, because when the valve is just opened, the gas stove has not been ignited, and the thermocouple cannot measure the high temperature at this time. If the temperature controller is energized at this time, the coil will force the valve to close. In order to avoid this situation, the delay time is set), the internal switch of the time relay 29 is closed and the temperature controller is connected; when the thermocouple detects that the temperature value is less than the set temperature, the temperature controller connects the circuit, the coil is energized, and the valve is closed. Preferably, the thermocouple is set at a position close to the flame of the gas stove, and the thermocouple, the temperature controller and the time relay are connected by lines respectively. The leakage switch 39-2 is an explosion-proof switch. When the gas leaks, the explosion-proof switch detects the gas leak, an alarm will be issued, and the circuit will be connected, the coil will be energized, and the valve will be closed.

[0047] The functions of the utility model are as follows:

[0048] Function 1: Press the valve opening handwheel 10 and rotate it clockwise. The valve opening handwheel 10 drives the incomplete gear 12 to rotate through the handwheel positioning rod 13. The incomplete gear 12 drives the rotating shaft 7 to rotate through the locking pin 16. At this time, the valve opening handwheel 10 generates pressure on the pressing column 14. The pressing column 14 transmits the pressure to the locking pin 16, causing the locking pin 16 to slide on the rotating shaft positioning plate 23. The rotating shaft 7 drives the valve handle shaft 6 to rotate through the slot 38 and the valve handle shaft pin 33 set on the valve handle shaft 6. The valve handle shaft 6 drives the square valve shaft 4 that slides and matches the valve handle shaft 6 to open the valve.

[0049] Function 2: When the locking pin 16 approaches the locking pin counterbore 34, the incomplete gear 12 begins to mesh with the intermediate gear 25. As the hand wheel continues to rotate, the incomplete gear 12 drives the timer gear 26 to rotate through the intermediate gear 25 to complete the specified time.

[0050] Function three: When the locking pin 16 is aligned with the locking pin countersunk hole 34 on the rotating shaft positioning plate 23, the locking pin 16 falls into the locking pin countersunk hole 34 on the rotating shaft positioning plate 23 under the pressure of the valve opening hand wheel 10. At this time, the valve is fully opened, and the rotating shaft 7 no longer continues to rotate with the incomplete gear 12. At this time, the valve automatic closing spring 3 and the rotating shaft reset spring 18 are both tightened and are in the maximum torque state. The cam presses the switch and the power is turned on.

[0051] Function 4: Continue to turn the handwheel. At this time, the valve has been opened, and the rotating shaft and the handle shaft no longer rotate with the incomplete gear, so the valve automatic closing spring 3 and the rotating shaft reset spring 18 no longer form resistance to the handwheel. At this time, the handwheel only overcomes the resistance of the timer shaft spring 36 and the resistance of the timer itself. When the handwheel is turned to reach the required set time. Release the handwheel, the handwheel is reset under the action of the handwheel reset spring 11, and the timer starts timing. At this time, the timer shaft spring 36 drives the timer gear 26 to drive the incomplete gear 12 to rotate through the intermediate gear 25.

[0052] Function five: When the incomplete gear 12 rotates to the pressing column hole 12-1 and coincides with the locking pin hole 7-1 on the shaft body of the rotating shaft 7, the locking pin 16 pops up into the pressing column hole 12-1 under the action of the locking pin return spring 17. After the locking pin 16 is separated from the rotating shaft positioning plate, the rotating shaft 7 rotates rapidly under the action of the rotating shaft return spring 18 and the valve automatic closing spring 3 to close the valve.

[0053] Function 6: When the timer needs to close the valve in advance before the set time is reached, the valve can be closed by simply pressing the valve handle shaft 6. When the valve handle shaft 6 is pressed, the valve handle shaft latch 33 is separated from the latch groove 38 on the rotating shaft 7, and the valve is automatically closed under the action of the valve automatic closing spring 3.

[0054] Function seven: When the timer has not been reset, after manually closing the valve, if you want to continue to open the valve for use, you only need to twist the valve handle shaft 6 to make the valve handle shaft pin 33 fall into the groove 38 of the rotating shaft 7 to complete the action of reopening the valve. At this time, if you need to reset the time, just turn the hand wheel (without pressing down) to reset it.

[0055] Function eight: When a fire or explosion occurs near the valve, the temperature near the valve will suddenly rise, and the heat-conducting safety pin sleeve buckle cap 19 will absorb the heat and transfer the heat to the paraffin between the safety pin sleeve buckle cap 19 and the safety pin sleeve 20, causing the paraffin to melt quickly. The safety pin sleeve buckle cap 19 is ejected by the safety pin 22 under the action of the safety pin ejection spring 21, and the safety pin 22 is disengaged from the slot of the rotating shaft positioning plate 23. The rotating shaft reset spring 18 drives the rotating shaft to rotate, and the valve automatic closing spring 3 drives the valve shaft to rotate, thereby achieving rapid closing of the valve.

[0056] Function nine: When the gas leak detection switch detects a gas leak, the leak switch 39-2 is closed, the electromagnetic coil is connected to the power supply, the electromagnetic coil is energized to pull down the valve handle shaft 6, and the valve automatic closing spring 3 drives the valve shaft to rotate and close the valve. At the same time, the leak alarm switch continues to sound an alarm to remind the user to deal with the leak in time.

Claims

1. A gas safety valve, comprising a valve opening hand wheel, a housing and a timer, wherein a rotating shaft, a valve handle shaft and an incomplete gear are arranged inside the housing, and the valve opening hand wheel and the valve handle shaft are an integrated mechanism, characterized in that: Also included are a safety pin assembly, a rotating shaft positioning plate, and an electromagnetic coil; The valve opening hand wheel is installed outside the housing; The valve opening hand wheel is sleeved on the upper section of the rotating shaft; the incomplete gear is sleeved on the middle section of the rotating shaft, and a rotating shaft positioning plate is arranged between the rotating shaft and the inner side of the shell; the rotating shaft is sleeved on the outside of the valve handle shaft, an electromagnetic coil is arranged on the inner side of the lower part of the shell, and the lower section of the valve handle shaft passes through the center of the electromagnetic coil; the lower end of the valve handle shaft is sleeved on the valve shaft; A handwheel positioning rod connected to the valve opening handwheel is arranged on the incomplete gear; a pressing column hole is also arranged on the incomplete gear, and a pressing column assembly is arranged in the pressing column hole; the incomplete gear is meshed with the timer gear through the intermediate gear for transmission; A locking pin hole is provided on the middle section of the rotating shaft, and a locking pin assembly is provided in the locking pin hole; the locking pin assembly is aligned and in contact with the pressing column assembly; A safety pin assembly is arranged on the outer side of the lower part of the shell, including a safety pin, a safety pin sleeve, a safety pin sleeve buckle cap and a safety pin pop-up spring; one end of the safety pin extends into the safety pin groove on the rotating shaft positioning plate in the shell; the other end of the safety pin is placed in the safety pin sleeve, and a safety pin pop-up spring is arranged on the outside of this part of the safety pin; the safety pin sleeve buckle cap is buckled on the outer end of the safety pin sleeve.

2. The gas safety valve according to claim 1, characterized in that: The valve opening hand wheel is sleeved at the front section of the rotating shaft, and a positioning rod hole is arranged behind the valve opening hand wheel; the positioning rod hole corresponds to the hand wheel positioning rod; a hand wheel reset spring used in conjunction with the hand wheel positioning rod is installed in the positioning rod hole.

3. The gas safety valve according to claim 1, characterized in that: A through hole is arranged in the center of the rotating shaft, and the valve handle shaft is inserted into the through hole; a handle reset spring is sleeved on the periphery of the front section of the valve handle shaft, and the handle reset spring is installed in the rotating shaft; the lower end of the valve handle shaft is slidably connected with the valve shaft, and a bayonet is arranged in the middle section of the valve handle shaft, and the bayonet cooperates with the slot on the rotating shaft.

4. The gas safety valve according to claim 1, characterized in that: The pressing column assembly includes a pressing column and a pressing column reset spring. The pressing column is inserted into the pressing column hole. A reducing shoulder is arranged in the pressing column hole. A large-diameter column cap is arranged at the upper end of the pressing column. A pressing column reset spring is sleeved on the pressing column on the upper side of the reducing shoulder.

5. The gas safety valve according to claim 1, characterized in that: The locking pin assembly includes a locking pin and a locking pin reset spring. The locking pin is inserted into the locking pin hole. The locking pin hole is a variable diameter hole with a larger upper portion and a smaller lower portion. A large diameter column cap is arranged at the upper end of the locking pin, and a locking pin reset spring is sleeved on the locking pin.

6. The gas safety valve according to claim 1, characterized in that: The rotating shaft positioning plate is arranged on the lower section of the rotating shaft; a safety pin groove is arranged on the outer circumference of the rotating shaft positioning plate, and the end of the safety pin is inserted into the safety pin groove; a locking pin countersunk hole is arranged on the rotating shaft positioning plate on the opposite side of the safety pin groove, and the locking pin countersunk hole is aligned with the locking pin hole; the lower end of the locking pin matches the locking pin countersunk hole.

7. The gas safety valve according to claim 1, characterized in that: The space between the buckle cap of the safety pin sleeve and the safety pin sleeve is filled with paraffin to achieve compression of the safety pin.

8. The gas safety valve according to claim 1, characterized in that: A square hole is arranged at the lower end of the valve handle shaft, and a square valve shaft is inserted into the square hole. A cam for controlling a circuit switch and a spring for controlling the automatic closing of the valve are sleeved on the valve shaft.

9. The gas safety valve according to claim 1, characterized in that: It also includes a control mechanism, which includes a line switch, an electromagnetic coil, a time relay, a temperature controller, and a thermocouple; the time relay and the temperature controller are installed outside the shell, and when the cam touches the line switch in the control mechanism, the time relay is energized; after the set time is reached, the internal switch of the time relay is closed and the temperature controller is turned on; when the thermocouple detects that the temperature value of the gas stove is lower than the set temperature, the temperature controller connects the circuit, the coil is energized, and the valve is closed.

10. The gas safety valve according to claim 1, characterized in that: A gas alarm switch connected to the control mechanism is arranged in the space above the safety valve; the gas alarm switch is an explosion-proof switch, which can detect gas leakage, sound an alarm and turn on the leakage switch, so that the coil is energized and the valve is closed.

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