Automatic explosion-proof device for gas furnace

Abstract

The invention relates to the technical field of gas furnace explosion prevention, and provides a gas furnace automatic explosion-proof device which comprises a gas furnace shell, penetrating openings are formed in the two ends of the gas furnace shell, an explosion-proof structure is connected to the outer surface of the gas furnace shell, and the explosion-proof structure comprises a multi-stage air cylinder with one end fixedly connected to the surface of the gas furnace shell. A fixed pulley is connected to the outer surface of the gas furnace shell, a steel wire rope is connected to the output end of the multi-stage air cylinder, an anti-explosion door is fixedly connected to the other end of the steel wire rope, a limiting plate is connected between the anti-explosion door and the gas furnace shell, and an electrical control unit is fixedly connected to the surface of the gas furnace shell and comprises a built-in control system. And a timer, an alarm, a counter and a temperature detector are respectively arranged at the terminal of the control system. By means of the technical scheme, the problems that in the using process of an existing heating furnace, due to misoperation of personnel and poor intrinsic safety of equipment, gas explosion accidents happen frequently, and safety needs to be enhanced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas furnace explosion protection, and specifically, to an automatic explosion protection device for a gas furnace. Background Art

[0002] During the heating and processing of aluminum rods, a gas furnace is usually used for high-temperature heating to improve the plasticity and processing performance of aluminum materials; however, when the gas furnace operates at high temperature for a long time or the gas supply is abnormal, it may cause an explosion or deflagration in the furnace due to factors such as gas leakage, backfire, and pressure fluctuations, which not only damages the equipment but also may trigger serious safety accidents; After retrieval, for the aluminum rod heating furnace with the authorization announcement number CN105180652B, this invention heats the aluminum rod by combining a preheating furnace with a single combustion chamber and a heating furnace with a double combustion chamber, with relatively high heating efficiency, and the preheating furnace and the heating furnace are transitioned through a transition wheel, which is convenient to use; However, in the process of using the above-mentioned existing heating furnace, gas explosion accidents frequently occur due to human misoperation and poor inherent safety of the equipment, and there is a need to strengthen the safety. Therefore, we propose an automatic explosion protection device for a gas furnace. Summary of the Invention

[0003] The present invention proposes an automatic explosion protection device for a gas furnace, which solves the problem that in the process of using the existing heating furnace mentioned in the background art, gas explosion accidents frequently occur due to human misoperation and poor inherent safety of the equipment, and there is a need to strengthen the safety.

[0004] The technical solution of the present invention is as follows: An automatic explosion protection device for a gas furnace includes a gas furnace outer shell. Through holes are provided at both ends of the gas furnace outer shell. An explosion protection structure is connected to the outer surface of the gas furnace outer shell. The explosion protection structure includes a multi-stage cylinder fixedly connected to the surface of the gas furnace outer shell at one end. A fixed pulley is connected to the outer surface of the gas furnace outer shell. A steel wire rope is connected to the output end of the multi-stage cylinder. The other end of the steel wire rope is fixedly connected to an explosion protection door. A limiting plate is connected between the explosion protection door and the gas furnace outer shell. An electrical control unit is fixedly connected to the surface of the gas furnace outer shell. The electrical control unit includes a built-in control system. Terminals of the control system are respectively provided with a timer, an alarm, a counter, and a temperature detector. Among them, the timer, the alarm, and the counter are all fixedly connected to the display housing of the control system. The temperature detector is fixedly connected to the inner wall surface of the gas furnace outer shell.

[0005] As a further technical solution of the present invention, an impact protection structure is connected to the outer surface of the gas furnace outer shell near the outside of the explosion protection door. A central shaft is rotatably connected to the inside of the gas furnace outer shell. A sleeve is fixedly connected to the outer surface of the central shaft. A temperature control structure is connected between the sleeve and the gas furnace outer shell.

[0006] As a further technical solution of the present invention, one end of the central shaft is fixedly connected to gear No. 1, the outer surface of the gear No. 1 is meshedly connected to gear No. 2, the outer surface of the gas furnace shell corresponding to gear No. 2 is fixedly connected to the main motor, the outer surface of the gas furnace shell is fixedly connected to the burner, the burner and the control system are conductively connected, the feed port of the burner is fixedly connected to the feed pipe, the other side of the gas furnace shell is fixedly connected to the air intake pipe, the air intake pipe is used to provide the gas necessary for combustion, the outer surface of the gas furnace shell is fixedly connected to a pressure relief pipe, the inside of the pressure relief pipe is fixedly connected to a pressure relief valve, which is used to relieve pressure when the internal pressure of the gas furnace shell is too high.

[0007] As a further technical solution of the present invention, the impact-proof structure includes an external fixing frame fixedly connected to the outer surface of the gas furnace shell near the limit plate and the explosion-proof door, the inner side of the external fixing frame is connected to a buffer spring, the other end of the buffer spring is connected to a bonding plate, a connecting plate is connected between the bonding plate and the external fixing frame, a hinge is connected between the connecting plate, the bonding plate and the external fixing frame, a fixing column is fixedly connected to the inner side of the external fixing frame, and a reinforcing block is fixedly connected to the outer surface of the bonding plate corresponding to the fixing column.

[0008] As a further technical solution of the present invention, the temperature control structure includes a rotating shaft that passes through the surface of the gas furnace shell, one end of the rotating shaft is fixedly connected to a toggle column, the inner side of the sleeve is rotatably connected to an inner tube, the outer surface of the inner tube is fixedly connected to protrusions near both ends, and the outer surface of the gas furnace shell is fixedly connected to a reduction motor near one end of the rotating shaft.

[0009] As a further technical solution of the present invention, the upper and lower positions of the explosion-proof door are adjusted by contraction and extension of the multi-stage cylinder, thereby opening or closing the through-hole. The limit plate is fixedly connected to the gas furnace shell, and the explosion-proof door slides up and down along the limit plate. The fixed pulley is used to maintain the stability of the explosion-proof door pulled by the wire rope.

[0010] As a further technical solution of the present invention, the timer is used to time the combustion time, the control system is used to control the operating status of the timer, alarm, counter and temperature detector, the control system is also used to control the operation of the multi-stage cylinder, the alarm is used to automatically alarm when the burner is extinguished multiple times, the counter is used to count the number of times the burner is extinguished, and the temperature detector is used to feed back the combustion temperature inside the gas furnace shell to the control system.

[0011] As a further technical solution of the present invention, both ends of the external fixer are fixedly connected to the gas furnace outer shell, the elastic ends of the buffer spring are respectively fixedly connected to the bonding plate and the external fixer, and both ends of the connecting plate are respectively hingedly connected to the bonding plate and the external fixer through hinges. The diameter of the fixing column is smaller than the inner diameter of the buffer spring, the number and position of the reinforcement blocks correspond to the number and position of the fixing columns, and the inner side of the bonding plate is in contact with the explosion-proof door.

[0012] As a further technical solution of the present invention, the inner tube is rotatably arranged inside the sleeve, the number of the protrusions is several groups and distributed in a ring array, and the rotating shaft passes through the inside of the gas furnace shell to the outside of the gas furnace shell.

[0013] As a further technical solution of the present invention, the number of the toggle columns is several groups and distributed in a ring array, the reduction motor is fixedly connected to the gas furnace shell through a bracket, the output end of the reduction motor is fixedly connected to one end of the rotating shaft, and the rotation of the inner tube is achieved by the forward or reverse rotation of the reduction motor.

[0014] The working principle and beneficial effects of the present invention are: The present invention uses the explosion-proof structure to automatically control the opening and closing of the explosion-proof door during use, forming a tight opening and closing logic. When the temperature inside the gas furnace shell is abnormal, the burner can be turned off and the explosion-proof door can be opened to expose the opening of the through-port. When necessary, an alarm and a machine lock operation can be performed. The invention has a high degree of automation, a simple structure, and is easy to operate. It effectively solves the gas use safety of the gas furnace during use, maximizes the inherent safety of the equipment, and effectively increases safety in logical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a logic diagram of the explosion-proof structure principle of the present invention; Figure 2 It is a structural schematic diagram of the gas furnace together with the explosion-proof device of the present invention; Figure 3 This is a block diagram of the principle of use of the explosion-proof structure of the present invention; Figure 4 It is a schematic diagram of the local structure of the explosion-proof structure of the present invention; Figure 5 This is a schematic diagram of the partial structure of the explosion-proof door of the present invention when it is opened; Figure 6 It is a schematic diagram of the local structure of the anti-impact structure of the present invention; Figure 7 For the present inventionFigure 6 Schematic diagram of the local structure cut away at ; Figure 8 For the present invention Figure 2 Schematic diagram of the cutaway local structure; Figure 9 It is a schematic diagram of the local structure of the temperature control structure of the present invention.

[0017] In the figure: 1. Gas furnace shell; 2. Explosion-proof structure; 21. Multi-stage cylinder; 22. Fixed pulley; 23. Steel wire rope; 24. Explosion-proof door; 25. Limit plate; 26. Electrical control unit; 261. Control system; 262. Timer; 263. Alarm; 264. Counter; 265. Temperature detector; 3. Anti-impact structure; 31. External fixator; 32. Buffer spring; 33. Laminating plate; 34. Connecting plate; 35. Hinge; 36. Fixed column; 37. Reinforcement block; 4. Through-hole; 5. Center axis; 6. Sleeve; 7. Temperature control structure; 71. Rotating axis; 72. Toggle column; 73. Inner tube; 74. Boss; 75. Reducer motor; 8. Gear No. 1; 9. Gear No. 2; 10. Main motor; 11. Burner; 12. Feed pipe; 13. Pressure relief pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0019] Example 1, as Figures 1 to 5 and Figure 8As shown in the figure, this embodiment proposes an automatic explosion-proof device for a gas stove, which includes a gas stove outer shell 1. Through holes 4 are provided at both ends of the gas stove outer shell 1. An explosion-proof structure 2 is connected to the outer surface of the gas stove outer shell 1. The explosion-proof structure 2 includes a multi-stage cylinder 21 fixedly connected to the surface of the gas stove outer shell 1 at one end. A fixed pulley 22 is connected to the outer surface of the gas stove outer shell 1. The output end of the multi-stage cylinder 21 is connected to a steel wire rope 23. The other end of the steel wire rope 23 is fixedly connected to an explosion-proof door 24. A limiting plate 25 is connected between the explosion-proof door 24 and the gas stove outer shell 1. An electrical control unit 26 is fixedly connected to the surface of the gas stove outer shell 1. The electrical control unit 26 includes a built-in control system 261. Terminals of the control system 261 are respectively provided with a timer 262, an alarm 263, a counter 264, and a temperature detector 265. Among them, the timer 262, the alarm 263, and the counter 264 are all fixedly connected to the display housing of the control system 261. The temperature detector 265 is fixedly connected to the inner wall surface of the gas stove outer shell 1. An impact-proof structure 3 is connected to the outer surface of the gas stove outer shell 1 near the outside of the explosion-proof door 24. A central shaft 5 is rotatably connected to the inside of the gas stove outer shell 1. A sleeve 6 is fixedly connected to the outer surface of the central shaft 5. A temperature control structure 7 is connected between the sleeve 6 and the gas stove outer shell 1.

[0020] One end of the central shaft 5 is fixedly connected to a first gear 8. A second gear 9 is meshed with the outer surface of the first gear 8. A main motor 10 is fixedly connected to the outer surface of the gas stove outer shell 1 corresponding to the second gear 9. A burner 11 is fixedly connected to the outer surface of the gas stove outer shell 1. The burner 11 is electrically connected to the control system 261. A feed pipe 12 is fixedly connected to the feed inlet of the burner 11. An intake pipe is fixedly connected to the other side of the gas stove outer shell 1. The intake pipe is used to provide necessary gases for combustion. A pressure relief pipe 13 is fixedly connected to the outer surface of the gas stove outer shell 1. A pressure relief valve is fixedly connected to the inside of the pressure relief pipe 13, which is used to relieve pressure when the internal pressure of the gas stove outer shell 1 is too high.

[0021] The up and down position adjustment of the explosion-proof door 24 is realized through the contraction and extension of the multi-stage cylinder 21, so as to open or close the through hole 4. The limiting plate 25 is fixedly connected to the gas stove outer shell 1. The explosion-proof door 24 slides up and down along the limiting plate 25. The fixed pulley 22 is used to maintain the stability of the steel wire rope 23 pulling the explosion-proof door 24. The timer 262 is used to time the combustion time. The control system 261 is used to control the operating states of the timer 262, the alarm 263, the counter 264, and the temperature detector 265. The control system 261 is also used to control the operation of the multi-stage cylinder 21. The alarm 263 is used to automatically alarm when the burner 11 goes out multiple times. The counter 264 is used to count the number of times the burner 11 goes out. The temperature detector 265 is used to feedback the combustion temperature inside the gas stove outer shell 1 to the control system 261.

[0022] In this embodiment, during use, the opening and closing of the explosion-proof door 24 can be automatically controlled to form a tight opening and closing logic. When the temperature inside the gas furnace shell 1 is abnormal, the burner 11 can be closed and the explosion-proof door 24 can be opened to expose the opening of the through-port 4. When necessary, an alarm and a machine lock operation can be performed. The invention has a high degree of automation, a simple structure, and is easy to operate. It effectively solves the gas use safety of the gas furnace during use, maximizes the inherent safety of the equipment, and effectively increases safety in logical operation.

[0023] Example 2, as Figures 6 to 7 As shown, on the basis of Example 1, an impact-proof structure 3 is proposed, which includes an external fixing frame 31 fixedly connected to the outer surface of the gas furnace shell 1 near the limit plate 25 and the explosion-proof door 24, a buffer spring 32 is connected to the inner side of the external fixing frame 31, and the other end of the buffer spring 32 is connected to a bonding plate 33, a connecting plate 34 is connected between the bonding plate 33 and the external fixing frame 31, a hinge 35 is connected between the connecting plate 34 and the bonding plate 33 and the external fixing frame 31, a fixing column 36 is fixedly connected to the inner side of the external fixing frame 31, and a reinforcing block 37 is fixedly connected to the outer surface of the bonding plate 33 corresponding to the fixing column 36.

[0024] Both ends of the external fixing frame 31 are fixedly connected to the gas furnace shell 1, the elastic ends of the buffer spring 32 are fixedly connected to the fitting plate 33 and the external fixing frame 31 respectively, and both ends of the connecting plate 34 are hingedly connected to the fitting plate 33 and the external fixing frame 31 respectively through hinges 35. The diameter of the fixing column 36 is smaller than the inner diameter of the buffer spring 32. The number and position of the reinforcement blocks 37 correspond to the number and position of the fixing columns 36. The inner side of the fitting plate 33 fits with the explosion-proof door 24.

[0025] In this embodiment, during use, when the explosion-proof door 24 is subjected to possible explosion impact force, it can provide a layer of protection for the explosion-proof door 24, and reduce the outward impact force of the explosion-proof door 24, thereby avoiding the explosion-proof door 24 from flying out due to explosion or deflagration, and effectively increasing safety at the physical level.

[0026] Example 3, as Figure 9 As shown, on the basis of Example 1, a temperature control structure 7 is further proposed, which includes a rotating shaft 71 that passes through the surface of the gas furnace shell 1, one end of the rotating shaft 71 is fixedly connected to a toggle column 72, the inner side of the sleeve 6 is rotatably connected to an inner tube 73, the outer surface of the inner tube 73 is fixedly connected to protrusions 74 near both ends, and the outer surface of the gas furnace shell 1 is fixedly connected to one end of the rotating shaft 71 to a reduction motor 75.

[0027] The inner tube 73 is rotatably arranged inside the sleeve 6, the number of the protrusions 74 is several groups and distributed in a ring array, and the rotating shaft 71 passes through the inside of the gas furnace shell 1 to the outside of the gas furnace shell 1; the number of the toggle columns 72 is several groups and distributed in a ring array, and the reduction motor 75 is fixedly connected to the gas furnace shell 1 through the bracket, and the output end of the reduction motor 75 is fixedly connected to one end of the rotating shaft 71, and the rotation of the inner tube 73 is achieved by the forward or reverse rotation of the reduction motor 75.

[0028] In this embodiment, during use, the aluminum rod inside the inner tube 73 can be rotated and heated at the same time as the original sleeve 6 is rotated and heated, thereby effectively improving the heating uniformity of the aluminum rod by the furnace body, effectively preventing the aluminum rod from deflagration or explosion due to uneven heating, and fundamentally solving the problem.

[0029] In summary, the operating principles of the present invention are as follows: During use, the multi-stage cylinder 21 is first contracted, and one end of the steel wire rope 23 is pulled by the multi-stage cylinder 21, so that the lower end of the steel wire rope 23 pulls the explosion-proof door 24 upward. At this time, the opening of the through-hole 4 for feeding is exposed, and the aluminum rod is fed from the through-hole 4 into the inner tube 73 inside the through-hole 4 through the feeding structure. Then, the main motor 10 drives the second gear 9 to rotate, and the second gear 9 drives the central shaft 5 to rotate, so that the inner tubes 73 inside different sleeves 6 correspond to the openings of the through-hole 4. The aluminum bars are fed in again. When the aluminum bars are fully loaded, the multi-stage cylinder 21 is extended. Under the action of gravity, the explosion-proof door 24 moves downward, closing the opening of the through-hole 4. Then, the burner 11 is automatically ignited by the electrical control unit 26, and the aluminum bars inside the gas furnace shell 1 are started to be heat-treated. At the same time, the main motor 10 runs, driving the second gear 9 to rotate. The second gear 9 drives the first gear 8 and the central shaft 5 to rotate. The rotation of the central shaft 5 realizes the rotation of the sleeve 6, thereby heating the aluminum bars. The ignition and explosion-proof logic automatically controlled by the electrical control unit 26 is as follows: 1) When the gas furnace device is started for the first time, the control system 261 detects the start signal of the burner 11 and opens the explosion-proof door 24 to ventilate and exhaust the air inside the gas furnace housing 1 in advance and reduce the pressure inside the furnace; 2) The control system 261 detects the burner 11 ignition success signal and starts timing through the timer 262, which is recorded as the first set of time. When the first set of time T1 is greater than or equal to 60s, the control system 261 sends a door closing signal and the explosion-proof door 24 automatically closes; 3) The control system 261 performs a logical AND operation on the ignition success signal and T1 ≥ 5s, and activates the ignition valve of the burner 11. At this time, the electric actuator of the burner 11 starts combustion, and the timer 262 starts counting the second set of time. When T2 ≥ 300s, the temperature detection program inside the gas furnace shell 1 is activated. The temperature is fed back to the control system 261 via the temperature detector 265. When the temperature is normal, the gas furnace startup and operation are completed. If the temperature is abnormal, the door opening signal is activated to open the explosion-proof door 24, and the second level password is activated to lock the machine. Contact a specialist for repair before using it again; 4) When the control system 261 detects a flameout alarm signal during the operation of the gas furnace and explosion-proof device, the counter 264 starts counting and sends a door-opening signal to open the explosion-proof door 24. When the count NC ≥ 3, the entire combustion furnace system is chain-controlled to shut down, the control system 261 alarms, and the level 1 password lock is activated. At this time, a professional is required to enter the password on the operation panel of the control system 261 before the ignition can be started again.

[0030] During the above-mentioned use, when the sleeve 6 drives the inner tube 73 and the convex head 74 to rotate, the reduction motor 75 can be used to drive the rotating shaft 71 to rotate, and the rotating shaft 71 can be used to drive the toggle column 72 to rotate, so that the toggle column 72 can periodically hit the convex head 74, so that the convex head 74 can drive the inner tube 73 to rotate, and the rotation of the inner tube 73 can drive the aluminum rod inside the inner tube 73 to rotate, so that the aluminum rod inside the furnace body can be rotated and heated, and the aluminum rod can be heated more evenly, so that deflagration or explosion caused by uneven heating will not occur, and the problem will be fundamentally solved.

[0031] During use, when the electrical system fails and continues to heat, and a deflagration or explosion occurs inside, the impact force will first impact the explosion-proof door 24. The position of the explosion-proof door 24 can be limited by the limit plate 25. At the same time, the bonding plate 33 will push the explosion-proof door 24 to prevent the explosion-proof door 24 from detaching to the outside. The explosion-proof door 24 pushes the bonding plate 33. The bonding plate 33 will push the hinge 35 and the buffer spring 32, thereby achieving a buffering effect, which can effectively reduce the damage that may be caused by its flying outward. At the same time, the setting of the reinforcement block 37 and the fixing column 36 can further enhance the support effect of the bonding plate 33, making it safer.

[0032] After the processing is completed, the explosion-proof door 24 of the other side outlet is opened, the through-hole 4 for discharging is opened, and the heated aluminum rod is pushed outward.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic explosion-proof device for a gas stove, comprising a gas stove housing (1), and through openings (4) are provided at both ends of the gas stove housing (1), characterized in that, An explosion-proof structure (2) is connected to the outer surface of the gas furnace shell (1). The explosion-proof structure (2) includes a multi-stage cylinder (21) with one end fixedly connected to the surface of the gas furnace shell (1). A fixed pulley (22) is connected to the outer surface of the gas furnace shell (1). A steel wire rope (23) is connected to the output end of the multi-stage cylinder (21). The other end of the steel wire rope (23) is fixedly connected to an explosion-proof door (24). A limiting plate (25) is connected between the explosion-proof door (24) and the gas furnace shell (1). An electrical control unit (26) is fixedly connected to the surface of the gas furnace shell (1). The electrical control unit (26) includes a built-in control system (261). Terminals of the control system (261) are respectively provided with a timer (262), an alarm (263), a counter (264), and a temperature detector (265). Among them, the timer (262), the alarm (263), and the counter (264) are all fixedly connected to the display housing of the control system (261). The temperature detector (265) is fixedly connected to the inner wall surface of the gas furnace shell (1).

2. The automatic explosion-proof device for a gas stove according to claim 1, characterized in that An impact-proof structure (3) is connected to the outer surface of the gas furnace shell (1) near the outside of the explosion-proof door (24). A central shaft (5) is rotatably connected inside the gas furnace shell (1). A sleeve (6) is fixedly connected to the outer surface of the central shaft (5). A temperature control structure (7) is connected between the sleeve (6) and the gas furnace shell (1).

3. The automatic explosion-proof device for gas stoves according to claim 2, wherein, One end of the central shaft (5) is fixedly connected to a first gear (8). A second gear (9) is meshed with the outer surface of the first gear (8). A main motor (10) is fixedly connected to the outer surface of the gas furnace shell (1) corresponding to the second gear (9). A burner (11) is fixedly connected to the outer surface of the gas furnace shell (1). The burner (11) is electrically connected to the control system (261). A feed pipe (12) is fixedly connected to the feed inlet of the burner (11). An intake pipe is fixedly connected to the other side of the gas furnace shell (1), and the intake pipe is used to provide necessary gas for combustion. A pressure relief pipe (13) is fixedly connected to the outer surface of the gas furnace shell (1). A pressure relief valve is fixedly connected inside the pressure relief pipe (13) for relieving pressure when the internal pressure of the gas furnace shell (1) is too high.

4. The automatic explosion-proof device for a gas stove according to claim 2, characterized in that, The impact-proof structure (3) includes an outer fixing frame (31) fixedly connected to the outer surface of the gas furnace shell (1) near the limiting plate (25) and the explosion-proof door (24). A buffer spring (32) is connected to the inner side of the outer fixing frame (31). The other end of the buffer spring (32) is connected to a fitting plate (33). An adapter plate (34) is connected between the fitting plate (33) and the outer fixing frame (31). Hinged parts (35) are connected between the adapter plate (34) and the fitting plate (33) and the outer fixing frame (31). A fixed column (36) is fixedly connected to the inner side of the outer fixing frame (31). A reinforcing block (37) is fixedly connected to the outer surface of the fitting plate (33) corresponding to the fixed column (36).

5. The automatic explosion-proof device for a gas stove according to claim 2, characterized in that, The temperature control structure (7) comprises a rotating shaft (71) penetrating the surface of the gas furnace shell (1); one end of the rotating shaft (71) is fixedly connected to a toggle column (72); the inner side of the sleeve (6) is rotatably connected to an inner tube (73); the outer surface of the inner tube (73) is fixedly connected to protrusions (74) near both ends; and the outer surface of the gas furnace shell (1) is fixedly connected to a reduction motor (75) near one end of the rotating shaft (71).

6. The automatic explosion-proof device for gas stoves according to claim 3, characterized in that, The explosion-proof door (24) is adjusted in upper and lower positions by contracting and extending the multi-stage cylinder (21), thereby opening or closing the through-port (4). The limit plate (25) is fixedly connected to the gas furnace shell (1). The explosion-proof door (24) slides up and down along the limit plate (25). The fixed pulley (22) is used to maintain the stability of the steel wire rope (23) pulling the explosion-proof door (24).

7. The automatic explosion-proof device for a gas stove according to claim 6, wherein, The timer (262) is used to time the combustion time, and the control system (261) is used to control the operating states of the timer (262), the alarm (263), the counter (264) and the temperature detector (265). The control system (261) is also used to control the operation of the multi-stage cylinder (21). The alarm (263) is used to automatically alarm when the burner (11) goes out multiple times. The counter (264) is used to count the number of times the burner (11) goes out. The temperature detector (265) is used to feed back the combustion temperature inside the gas furnace shell (1) to the control system (261).

8. The automatic explosion-proof device for a gas stove according to claim 4, wherein, Both ends of the external fixing frame (31) are fixedly connected to the gas furnace shell (1); both ends of the elastic portion of the buffer spring (32) are fixedly connected to the bonding plate (33) and the external fixing frame (31), respectively; both ends of the connecting plate (34) are hingedly connected to the bonding plate (33) and the external fixing frame (31) via hinges (35); the diameter of the fixing column (36) is smaller than the inner diameter of the buffer spring (32); the number and position of the reinforcing blocks (37) correspond to the number and position of the fixing columns (36); and the inner side of the bonding plate (33) is in contact with the explosion-proof door (24).

9. The automatic explosion-proof device for a gas stove according to claim 5, wherein The inner tube (73) is rotatably arranged inside the sleeve (6), the protrusions (74) are provided in a plurality of groups and are distributed in a ring array, and the rotating shaft (71) passes through the inside of the gas furnace shell (1) to the outside of the gas furnace shell (1).

10. The automatic explosion-proof device for a gas stove according to claim 9, characterized in that, The number of the toggle columns (72) is several groups and they are distributed in a ring array. The reduction motor (75) is fixedly connected to the gas furnace shell (1) through a bracket. The output end of the reduction motor (75) is fixedly connected to one end of the rotating shaft (71). The rotation of the inner tube (73) is achieved by the forward or reverse rotation of the reduction motor (75).

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