Safety valve device for shutting off gas cylinders

Abstract

This invention discloses a safety valve device for shutting off gas cylinders, comprising a safety valve enabling circuit, a safety valve control circuit, and a safety valve magnetic opening and closing mechanism. The safety valve enabling circuit sends a safety valve closing enable signal. The safety valve control circuit is connected to both the safety valve enabling circuit and the safety valve magnetic opening and closing mechanism, and controls the magnetic opening and closing mechanism to move forward under magnetic attraction based on the safety valve closing enable signal, thus blocking the gas outlet of the safety valve in case of gas leakage. This invention utilizes a coil to drive a magnetic ring, which in turn drives an internally magnetized plastic component, achieving a clever structure of external drive and internal linkage. The external plastic component then pushes the external magnetic ring to restore the gas flow state, achieving excellent linkage between shut-off and gas flow, effectively solving the safety hazards caused by gas leaks from gas cylinders; it boasts good safety performance and a high degree of intelligence.

Description

Technical Field

[0001] This invention relates to the field of safety valve technology, and in particular discloses a safety valve device for cutting off the gas supply when a gas cylinder leaks. Background Technology

[0002] During the use of gas cylinders, many gas leaks occur due to leaks or damage to pressure reducing valves or connecting pipes. Existing gas valves do not have corresponding installation and control mechanisms, which can easily lead to gas leaks and cause fires and explosions, posing a great safety hazard.

[0003] Therefore, the aforementioned defects in existing gas valves are technical problems that urgently need to be solved. Summary of the Invention

[0004] This invention provides a safety valve device for shutting off gas cylinders, aiming to solve the above-mentioned defects of existing gas valves.

[0005] This invention relates to a safety valve device for shutting off gas cylinders, comprising a safety valve enabling circuit, a safety valve control circuit, and a safety valve magnetic opening and closing mechanism, wherein...

[0006] Safety valve enabling circuit, used to send a safety valve closing enable signal;

[0007] The safety valve control circuit is connected to the safety valve enabling circuit and the safety valve magnetic opening and closing mechanism respectively. It is used to control the safety valve magnetic opening and closing mechanism to move forward under the action of magnetic attraction according to the safety valve closing enable signal issued by the safety valve enabling circuit, so as to block the gas outlet of the safety valve when gas leaks.

[0008] Furthermore, the safety valve enabling circuit includes a tactile switch and a microcontroller connected to the tactile switch, with the twelfth pin of the microcontroller connected to the tactile switch.

[0009] Furthermore, the safety valve enable circuit also includes a wireless communication module, with the microcontroller's eleventh pin connected to the wireless communication module.

[0010] Furthermore, the safety valve control circuit includes a battery voltage input circuit, a PWM converter, and an output voltage control circuit. The microcontroller is connected to the battery voltage input circuit, the PWM converter, and the output voltage control circuit respectively. After receiving the safety valve closing enable signal from the safety valve enable circuit, the microcontroller controls the battery voltage input circuit to input the battery voltage into the PWM converter. After being boosted by the PWM converter, the microcontroller controls the output voltage control circuit to output a start voltage to drive the magnetic opening and closing mechanism of the safety valve to move forward, blocking the outlet of the safety valve when gas leaks.

[0011] Furthermore, the output voltage control circuit includes a first resistor, a second resistor, a third resistor, a first transistor, a first field-effect transistor (FET), and a first diode. The base of the first transistor is connected to the first pin of the microcontroller through the first resistor. The collector of the first transistor is connected to the gate of the first FET through the second resistor. The emitter of the first transistor is grounded. The source of the first FET is divided into two paths: one path is connected to the gate of the first FET through the third resistor, and the other path is connected to the PWM converter. The drain of the first FET is connected to the first pin of the safety valve. The second pin of the safety valve is grounded. The second pin of the safety valve is connected to the first pin of the safety valve through the first diode.

[0012] Furthermore, the battery voltage introduction circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a second transistor, and a second field-effect transistor. The base of the second transistor is connected to the third pin of the microcontroller through the fourth resistor, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the gate of the second field-effect transistor through the fifth resistor. The drain of the second transistor is divided into two paths: one path is connected to the gate of the second transistor through the sixth resistor, and the other path is connected to the PWM converter. The source of the second field-effect transistor is connected to the battery.

[0013] Furthermore, the PWM converter includes a boost chip, a second diode, an inductor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor. The first pin of the boost chip is divided into two paths: one path is connected to the source of the first field-effect transistor through the second diode; the other path is connected to ground through the inductor and the first and second capacitors in parallel. The second pin of the boost chip is grounded. The third pin of the boost chip is divided into two paths: one path is connected to ground through the seventh resistor, and the other path is connected to the source of the first field-effect transistor through the eighth resistor. The fourth pin of the boost chip is connected to the second pin of the microcontroller. The fifth pin of the boost chip is divided into two paths: one path is connected to ground through the third capacitor, and the other path is connected to the drain of the second transistor. The sixth pin of the boost chip is grounded through the ninth resistor.

[0014] Furthermore, the sixth pin of the microcontroller is connected to the battery via the third diode.

[0015] Furthermore, the magnetic opening and closing mechanism of the safety valve includes a magnetic closing assembly, which comprises a wound plastic part, a magnetic ring, a metal connector, a metal connecting rod, a magnetic column, a sealing plastic part, and a sealing rubber gasket. The magnetic ring is movably sleeved on the metal connecting rod, and the wound plastic part is provided with a coil for driving the axial movement of the magnetic ring. The metal connecting rod is fixedly sleeved inside the wound plastic part, and the metal connector is fixedly sleeved inside the metal connecting rod. The sealing rubber gasket, the sealing plastic part, and the magnetic column are sequentially connected and movably sleeved inside the wound plastic part. The magnetic ring, driven by the coil, drives the magnetic column to move axially through magnetic attraction, and seals the sealing port of the metal connecting rod via the sealing rubber gasket, thereby blocking the gas outlet in case of gas leakage.

[0016] Furthermore, the magnetic opening and closing mechanism of the safety valve also includes a safety valve venting restoration component. The safety valve venting restoration component includes an external manual opening and closing plastic part, an external fixed plastic part, and a compression spring. The compression spring is located between the external manual opening and closing plastic part and the external fixed plastic part. The external manual opening and closing plastic part is provided with a corresponding locking position for engaging the external fixed plastic part. The external manual opening and closing plastic part is fixedly connected to the magnetic ring. The magnetic ring is used to return to its original position under the action of the compression spring's restoring force, simultaneously driving the sealing rubber gasket to return to its original position, opening the sealing port of the metal connecting rod to restore venting.

[0017] The beneficial effects achieved by this invention are as follows:

[0018] This invention provides a safety valve device for shutting off gas cylinders, comprising a safety valve enabling circuit, a safety valve control circuit, and a safety valve magnetic opening and closing mechanism. The safety valve enabling circuit sends a safety valve closing enabling signal. The safety valve control circuit is connected to both the safety valve enabling circuit and the safety valve magnetic opening and closing mechanism, and controls the magnetic opening and closing mechanism to move forward under magnetic attraction based on the safety valve closing enabling signal, thus blocking the gas outlet of the safety valve in case of gas leakage. The safety valve device for shutting off gas cylinders provided by this invention utilizes a coil to drive a magnetic ring, which in turn drives an internally magnetically coupled plastic component, achieving a clever structure of external drive and internal linkage. The external plastic component then pushes the external magnetic ring to restore the gas flow state, achieving excellent linkage between shut-off and gas flow, effectively solving the safety hazards caused by gas leaks from gas cylinders; it boasts good safety performance and a high degree of intelligence. Attached Figure Description

[0019] Figure 1 This is a functional block diagram of an embodiment of the safety valve device for shutting off gas cylinders according to the present invention;

[0020] Figure 2 This is a circuit diagram of the wireless independent safety valve and the wireless pressure reducing and shut-off integrated safety valve in the safety valve device for shutting off gas cylinders of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the wired independent safety valve in the safety valve device for shutting off gas cylinders according to the present invention.

[0022] Figure 4 for Figure 3 A schematic diagram of the front structure of the wired independent safety valve shown;

[0023] Figure 5 for Figure 4 A cross-sectional view along plane AA;

[0024] Figure 6 This is an exploded schematic diagram of the wired independent safety valve in the safety valve device for shutting off gas cylinders according to the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the integrated wire pressure reducing and shut-off safety valve in the safety valve device for shutting off gas cylinders according to the present invention.

[0026] Figure 8 This is an exploded schematic diagram of the wire pressure reducing and shut-off integrated safety valve in the safety valve device for shutting off gas cylinders of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the wireless independent safety valve in the safety valve device for shutting off gas cylinders of the present invention.

[0028] Figure 10 This is an exploded schematic diagram of the wireless independent safety valve in the safety valve device for shutting off gas cylinders according to the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the wireless pressure reducing and shut-off integrated safety valve in the safety valve device for shutting off gas cylinders of the present invention.

[0030] Figure 12 This is an exploded schematic diagram of the wireless pressure reducing and shut-off integrated safety valve in the safety valve device for shutting off gas cylinders of the present invention.

[0031] Explanation of icon numbers:

[0032] 10. Safety valve enabling circuit; 20. Safety valve control circuit; 30. Safety valve magnetic opening and closing mechanism; 11. Tactile switch; 31. Winding plastic part; 32. Magnetic ring; 33. Metal connector; 34. Metal connecting rod; 35. Magnetic column; 36. Sealing plastic part; 37. Sealing rubber gasket; 381. External manual opening and closing plastic part; 382. External fixing plastic part; 383. Compression spring; 391. Nitrile rubber stopper; 392. Handwheel; 393. Iron connecting rod. Detailed Implementation

[0033] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figures 1 to 12 As shown, the first embodiment of the present invention proposes a safety valve device for shutting off gas cylinders. The safety valve device is divided into four types: wired independent safety valve, wireless independent safety valve, wired pressure reducing and shut-off integrated safety valve, and wireless pressure reducing and shut-off integrated safety valve. The safety valve structures and circuits involved are all the same, so they are applied for together. The wired independent safety valve and the wired pressure reducing and shut-off integrated safety valve do not require circuit driving and are driven by an external alarm. The wireless independent safety valve and the wireless pressure reducing and shut-off integrated safety valve include a safety valve enabling circuit 10, a safety valve control circuit 20, and a safety valve magnetic opening and closing mechanism 30. The safety valve enabling circuit 10 is used to send a safety valve closing enabling signal. The safety valve control circuit 20 is connected to the safety valve enabling circuit 10 and the safety valve magnetic opening and closing mechanism 30 respectively. It is used to control the safety valve magnetic opening and closing mechanism 30 to move forward under the action of magnetic attraction according to the safety valve closing enabling signal sent by the safety valve enabling circuit 10, so as to block the gas outlet of the safety valve in case of gas leakage. In this embodiment, the safety valve enabling circuit 10 and the safety valve control circuit 20 can use existing circuits, and the safety valve magnetic opening and closing mechanism 30 can use existing mechanical structures, such as magnetic ring iron column structure, suction cup electromagnet structure, etc., all of which are within the protection scope of this patent.

[0035] Further, see Figures 1 to 12 The safety valve device for shutting off gas cylinders proposed in this embodiment includes a safety valve enabling circuit 10 comprising a tactile switch 11 and a microcontroller U1 connected to the tactile switch 11 (KEY1). The twelfth pin of the microcontroller U1 is connected to the tactile switch 11. In this embodiment, the microcontroller U1 is model STC8G1K08-16. In this embodiment, the tactile switch 11 sends a safety valve closing enable signal to the microcontroller U1; the microcontroller U1 receives the safety valve closing enable signal from the tactile switch 11 and controls the magnetic opening and closing mechanism 30 of the safety valve to move forward under the action of magnetic attraction, blocking the outlet of the safety valve in case of gas leakage. It has good safety performance and a high degree of intelligence.

[0036] Preferably, please see Figures 1 to 12The safety valve device for shutting off gas cylinders proposed in this embodiment includes a wireless communication module CON1 in the safety valve enable circuit 10. The eleventh pin of the microcontroller U1 is connected to the wireless communication module CON1. ​​The wireless communication module can be a 433MHz wireless module, a 2.4G wireless module, a 4G (Fourth Generation Communications System) / 5G (5th Generation Mobile Communications Technology) wireless module, Bluetooth, WIFI (mobile hotspot), LORA (Long Range Radio), ZigBee, or other wireless modules. In this embodiment, the wireless communication module CON1 is connected to a gas alarm to detect gas leaks in the gas cylinder. When a gas leak is detected, it sends a safety valve closing enable signal to the microcontroller U1. The microcontroller U1 controls the magnetic opening and closing mechanism 30 of the safety valve to move forward under the action of magnetic attraction, blocking the outlet of the safety valve when a gas leak occurs. This provides good safety performance and a high degree of intelligence.

[0037] Further, see Figures 1 to 12The safety valve device for shutting off gas cylinders proposed in this embodiment includes a safety valve control circuit 20 comprising a battery voltage input circuit, a PWM (Pulse Width Modulation) converter, and an output voltage control circuit. The microcontroller U1 is connected to the battery voltage input circuit, the PWM converter, and the output voltage control circuit respectively. After receiving the safety valve closing enable signal from the safety valve enable circuit 10, the microcontroller controls the battery voltage input circuit to input the battery voltage into the PWM converter. After being boosted by the PWM converter, the microcontroller controls the output voltage control circuit to output a start voltage to drive the magnetic opening and closing mechanism 30 of the safety valve to move forward, thereby blocking the outlet of the safety valve in case of gas leakage. Specifically, the output voltage control circuit includes a first resistor R3, a second resistor R4, a third resistor R5, a first transistor Q1, a first field-effect transistor Q2, and a first diode D3. The base of the first transistor Q1 is connected to the first pin of the microcontroller U1 through the first resistor R3. The collector of the first transistor Q1 is connected to the gate of the first field-effect transistor Q2 through the second resistor R4. The emitter of the first transistor Q1 is grounded. The source of the first field-effect transistor Q2 is divided into two paths: one path is connected to the gate of the first field-effect transistor Q2 through the third resistor R5, and the other path is connected to the PWM converter. The drain of the first field-effect transistor Q2 is connected to the first pin of the safety valve CON4. The second pin of the safety valve CON4 is grounded, and the second pin of the safety valve CON4 is connected to the first pin of the safety valve CON4 through the first diode D3. In this embodiment, the first transistor Q1 is an S8050, the first field-effect transistor Q2 is an SI2301, and the first diode D3 is a 1N4007.

[0038] Preferably, see Figures 1 to 12 The safety valve device for shutting off gas cylinders proposed in this embodiment includes a battery voltage introduction circuit comprising a fourth resistor R1, a fifth resistor R10, a sixth resistor R11, a second transistor Q3, and a second field-effect transistor Q4. The base of the second transistor Q3 is connected to the third pin of the microcontroller U1 through the fourth resistor R1. The emitter of the second transistor Q3 is grounded, and the collector of the second transistor Q3 is connected to the gate of the second field-effect transistor Q4 through the fifth resistor R10. The drain of the second transistor Q3 is divided into two paths: one path is connected to the gate of the second transistor Q3 through the sixth resistor R11, and the other path is connected to the PWM converter. The source of the second field-effect transistor Q4 is connected to the battery. In this embodiment, the second transistor Q3 is an S8050, and the second field-effect transistor Q4 is an SI2301.

[0039] Further, please see Figures 1 to 12The safety valve device for shutting off gas cylinders proposed in this embodiment includes a PWM converter comprising a boost chip U2, a second diode D1, an inductor L1, a seventh resistor R7, an eighth resistor R6, a ninth resistor R2, a first capacitor C5, a second capacitor C2, a third capacitor C7, and a fourth capacitor C6. The first pin of the boost chip U2 is divided into two paths: one path is connected to the source of the first field-effect transistor Q3 through the second diode D1; the other path is connected to ground through the inductor L1 and the parallel first capacitor C5 and second capacitor C2. The second pin of the boost chip U2 is grounded. The third pin of the boost chip U2 is divided into two paths: one path is connected to ground through the seventh resistor R7, and the other path is connected to the source of the first field-effect transistor Q3 through the eighth resistor R6. The fourth pin of the boost chip U2 is connected to the second pin of the microcontroller U1. The fifth pin of the boost chip U2 is divided into two paths: one path is connected to ground through the third capacitor C7, and the other path is connected to the drain of the second transistor Q3. The sixth pin of the boost chip U2 is grounded through the ninth resistor R2. The sixth pin of the microcontroller U1 is connected to the battery CON3 via the third diode D2. In this embodiment, the boost converter U2 is model SD6271.

[0040] Preferably, see Figures 1 to 12 The safety valve device for shutting off gas cylinders proposed in this embodiment includes a magnetic opening and closing mechanism 30 comprising a magnetic closing assembly. This assembly includes a wound plastic component 31, a magnetic ring 32, a metal connector 33, a metal connecting rod 34, a magnetic column 35, a sealing plastic component 36, and a sealing rubber pad 37. The magnetic ring 32 is movably mounted on the metal connecting rod 34. The wound plastic component 31 has a coil for driving the magnetic ring 32 to move axially. The metal connecting rod 34 is fixedly mounted inside the wound plastic component 31, and the metal connector 33 is also fixedly mounted inside the metal connecting rod 34. The sealing rubber pad 37, the sealing plastic component 36, and the magnetic column 35 are sequentially connected and movably mounted inside the wound plastic component 31. Driven by the coil, the magnetic ring 32 drives the magnetic column 35 to move axially via magnetic attraction, sealing the gas outlet on the metal connecting rod 34 via the sealing rubber pad 37, thus blocking the gas outlet in case of gas leakage. In this embodiment, the magnetic column 35, the sealing plastic part 36, and the sealing rubber gasket 37 are sequentially connected to form an integral plastic part. The magnetic ring 32 is driven by the coil, and the magnetic ring 32 drives the plastic part connected by the internal magnet, thereby blocking the sealing port of the copper connecting rod 014. In the event of gas leakage, the outlet is blocked, thus achieving the function of safety sealing.

[0041] Further, see Figures 1 to 12The safety valve device for shutting off gas cylinders proposed in this embodiment includes a safety valve magnetic opening and closing mechanism 30 that further comprises a safety valve re-venting component. This component includes an external manually operated plastic part 381, an external fixed plastic part 382, ​​and a compression spring 383. The compression spring 383 is positioned between the external manually operated plastic part 381 and the external fixed plastic part 382. The external manually operated plastic part 381 has a corresponding locking position for engaging the external fixed plastic part 382. The external manually operated plastic part 381 is fixedly connected to a magnetic ring 32. The magnetic ring 32 is used to return to its original position under the restoring force of the compression spring 383, simultaneously driving the sealing rubber gasket 37 to its original position, opening the sealing port of the metal connecting rod 34 to restore ventilation. The safety valve device for shutting off gas cylinders proposed in this embodiment achieves excellent linkage safety performance between shut-off and ventilation, and a high degree of intelligence, by having the external plastic part push the external magnetic ring to restore the ventilation state.

[0042] like Figures 1 to 12 As shown in the figure, the working principle of the safety valve device for shutting off gas cylinders provided in this embodiment is as follows:

[0043] When the battery is installed, the microcontroller U1 operates. When the tactile switch 11 is pressed, the boost chip U2 is enabled, and the battery voltage is simultaneously introduced into the boost chip U2 (at this time, Q3 is turned on and Q4 is working). The boost chip U2 works normally, instantly boosting the output to 12V. At this time, the first transistor Q1 and the second transistor Q3, controlled by the microcontroller U1, introduce 12V to the safety valve. The safety valve receives 12V and closes. When the wireless communication module CON1 receives a wireless signal and transmits the wireless signal to the microcontroller U1, the microcontroller U1 automatically sends an enable and control signal, introducing 12V to the safety valve. The safety valve receives 12V and closes.

[0044] The wireless gas cylinder shut-off safety valve operates as follows: It is installed in the same way as a regular pressure reducing valve. The nitrile rubber stopper 391 is used to block the internal gas outlet of the gas cylinder, and the handwheel 392 is tightened. Then, the gas alarm and PCB (Printed Circuit Board) are used for code learning.

[0045] When the gas alarm detects a leak, it transmits a wireless signal, which is received by the wireless communication module CON1 on the PCB board. Powered by two AAA batteries, the magnetic ring 32 is driven forward by the coil of the wound plastic part 31. The movement of the magnetic ring 32 triggers the sealing plastic part 36 containing the magnetic column 35 and the sealing rubber gasket 37 inside the metal connecting rod 34 to move forward together, thereby blocking the sealing port of the metal connecting rod 34. In the event of a gas leak, the outlet is blocked, achieving a safety seal. Once the hazard is eliminated, the locking mechanism on the externally manually operated plastic component 381 engages with the externally fixed plastic component 382. Internally, a compression spring 383 provides force. By pushing the externally manually operated plastic component 381, the magnetic ring 32 returns to its original position. The iron connecting rod 393 also acts to pull the magnetic ring 32 back. When the magnetic ring 32 returns to its original position, the assembly containing the internally sealed plastic component 36 with the magnetic column 35 and the sealed rubber gasket 37 also returns to its original position, thereby opening the sealing port of the metal connector 33 and restoring normal ventilation.

[0046] The safety valve device for shutting off gas cylinders provided in this embodiment, compared with the prior art, employs a safety valve enabling circuit, a safety valve control circuit, and a safety valve magnetic opening and closing mechanism. The safety valve enabling circuit sends a safety valve closing enabling signal. The safety valve control circuit is connected to both the safety valve enabling circuit and the safety valve magnetic opening and closing mechanism, and controls the magnetic opening and closing mechanism to move forward under magnetic attraction based on the safety valve closing enabling signal, thus blocking the gas outlet of the safety valve in case of gas leakage. The safety valve device for shutting off gas cylinders provided in this embodiment utilizes a coil to drive a magnetic ring, which in turn drives an internally magnetically coupled plastic component, achieving a clever structure of external drive and internal linkage. The external plastic component then pushes the external magnetic ring to restore the gas flow state, achieving excellent linkage between shut-off and gas flow, effectively solving the safety hazards caused by gas leaks from gas cylinders; it boasts good safety performance and a high degree of intelligence.

[0047] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims and their equivalents, the invention is also intended to include these modifications and modifications.

Claims

1. A safety valve device for shutting off gas cylinders, characterized in that, It includes a safety valve enabling circuit (10), a safety valve control circuit (20), and a safety valve magnetic opening and closing mechanism (30), wherein, The safety valve enabling circuit (10) is used to send a safety valve closing enable signal; The safety valve control circuit (20) is connected to the safety valve enabling circuit (10) and the safety valve magnetic opening and closing mechanism (30) respectively. It is used to control the safety valve magnetic opening and closing mechanism (30) to move forward under the action of magnetic attraction according to the safety valve closing enable signal issued by the safety valve enabling circuit (10), so as to block the gas outlet of the safety valve when gas leaks. The safety valve magnetic opening and closing mechanism (30) includes a safety valve magnetic closing assembly and a safety valve re-venting assembly. The safety valve magnetic closing assembly includes a wound plastic part (31), a magnetic ring (32), a metal connector (33), a metal connecting rod (34), a magnetic column (35), a sealing plastic part (36), and a sealing rubber gasket (37). The magnetic ring (32) is movably sleeved on the metal connecting rod (34). The wound plastic part (31) is provided with a coil for driving the magnetic ring (32) to move axially. The metal connecting rod (34) is fixed. The metal connector (33) is fixedly fitted inside the metal connecting rod (34) and the sealing rubber gasket (37), the sealing plastic part (36) and the magnet column (35) are sequentially connected and movably fitted inside the winding plastic part (31); the magnetic ring (32) is used to drive the magnet column (35) to move axially under the drive of the coil by magnetic attraction, and to seal the sealing port of the metal connecting rod (34) through the sealing rubber gasket (37) so as to block the gas outlet when gas leaks; The safety valve re-ventilation assembly includes an external manual opening / closing plastic part (381), an external fixing plastic part (382), and a compression spring (383). The compression spring (383) is located between the external manual opening / closing plastic part (381) and the external fixing plastic part (382). The external manual opening / closing plastic part (381) has a corresponding locking position for engaging the external fixing plastic part (382). The external manual opening / closing plastic part (381) is fixedly connected to the magnetic ring (32). The magnetic ring (32) is used to return to its original position under the restoring force of the compression spring (383), simultaneously driving the sealing rubber pad (37) to return to its original position, opening the sealing port of the metal connecting rod (34) to restore ventilation.

2. The safety valve device for shutting off gas cylinders as described in claim 1, characterized in that, The safety valve enabling circuit (10) includes a tactile switch (11) and a microcontroller connected to the tactile switch (11), wherein the twelfth pin of the microcontroller is connected to the tactile switch (11).

3. The safety valve device for shutting off gas cylinders as described in claim 2, characterized in that, The safety valve enabling circuit (10) also includes a wireless communication module, and the eleventh pin of the microcontroller is connected to the wireless communication module.

4. The safety valve device for shutting off gas cylinders as described in claim 3, characterized in that, The safety valve control circuit (20) includes a battery voltage input circuit, a PWM converter, and an output voltage control circuit. The microcontroller is connected to the battery voltage input circuit, the PWM converter, and the output voltage control circuit respectively. After receiving the safety valve closing enable signal from the safety valve enable circuit (10), the microcontroller controls the battery voltage input circuit to input the battery voltage into the PWM converter. After being boosted by the PWM converter, the microcontroller controls the output voltage control circuit to output a start voltage to drive the magnetic opening and closing mechanism (30) of the safety valve to move forward and block the outlet of the safety valve when gas leaks.

5. The safety valve device for shutting off gas cylinders as described in claim 4, characterized in that, The output voltage control circuit includes a first resistor, a second resistor, a third resistor, a first transistor, a first field-effect transistor (FET), and a first diode. The base of the first transistor is connected to the first pin of the microcontroller through the first resistor. The collector of the first transistor is connected to the gate of the first FET through the second resistor. The emitter of the first transistor is grounded. The source of the first FET is divided into two paths: one path is connected to the gate of the first FET through the third resistor, and the other path is connected to the PWM converter. The drain of the first FET is connected to the first pin of the safety valve. The second pin of the safety valve is grounded. The second pin of the safety valve is connected to the first pin of the safety valve through the first diode.

6. The safety valve device for shutting off gas cylinders as described in claim 5, characterized in that, The battery voltage introduction circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a second transistor, and a second field-effect transistor. The base of the second transistor is connected to the third pin of the microcontroller through the fourth resistor. The emitter of the second transistor is grounded, and the collector of the second transistor is connected to the gate of the second field-effect transistor through the fifth resistor. The drain of the second transistor is divided into two paths: one path is connected to the gate of the second transistor through the sixth resistor, and the other path is connected to the PWM converter. The source of the second field-effect transistor is connected to the battery.

7. The safety valve device for shutting off gas cylinders as described in claim 6, characterized in that, The PWM converter includes a boost chip, a second diode, an inductor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor. The first pin of the boost chip is divided into two paths: one path is connected to the source of the first field-effect transistor through the second diode; the other path is grounded after passing through the inductor and the first and second capacitors in parallel. The second pin of the boost chip is grounded. The third pin of the boost chip is divided into two paths: one path is grounded through the seventh resistor, and the other path is connected to the source of the first field-effect transistor after passing through the eighth resistor. The fourth pin of the boost chip is connected to the second pin of the microcontroller. The fifth pin of the boost chip is divided into two paths: one path is grounded through the third capacitor, and the other path is connected to the drain of the second transistor. The sixth pin of the boost chip is grounded through the ninth resistor.

8. The safety valve device for shutting off gas cylinders as described in claim 6, characterized in that, The sixth pin of the microcontroller is connected to the battery via the third diode.

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