A domestic combustible gas detector

Abstract

The application discloses a household combustible gas detector and relates to the related field of gas detection devices, which comprises a mounting plate one, a connecting block is fixedly arranged at the bottom of the mounting plate one, a sealing plate one is fixedly arranged on one side of the connecting block, a sealing plate two that can move up and down is arranged on one side of the mounting plate one and faces the upper side of the sealing plate one, the air bags one and two are inflated by starting the air pump, the air bag two gradually expands, and then the air bag two extrudes the air pipe and is sealed, air is filled into the air bag one, the air bag one gradually expands, and the sealing plate two is moved, at this time, the sealing plate two moves from the air outlet side of the total valve to the air inlet side under the guide sliding of the sliding block, then each electric telescopic rod two is controlled to be elongated, all the moving plates one are moved out from the moving cavities one and abut against and seal the outer circular surface of the air inlet pipe, and the total valve is sealed.

Description

Technical Field

[0001] This invention relates to the field of gas detection devices, specifically a household combustible gas detector. Background Technology

[0002] Combustible gas detectors, also known as gas leak detection alarms, are a type of preventative alarm used in area safety monitoring systems. Current technology can detect the concentration of leaking gas to determine if a leak has occurred. When a leak occurs, it alerts the homeowner via an alarm. However, it cannot effectively seal the leak point to prevent the hazards caused by continued leakage, nor can it effectively vent leaked combustible gas from indoors to the outdoors, posing a certain safety hazard to the homeowner. Summary of the Invention

[0003] The purpose of this invention is to provide a household combustible gas detector to solve the above-mentioned problems.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A household combustible gas detector includes a mounting plate 1, a connecting block fixedly provided at the bottom of the mounting plate 1, a sealing plate 1 fixedly provided on one side of the connecting block, and a sealing plate 2 movable up and down provided on one side of the mounting plate 1 and directly above the sealing plate 1. A valve closing mechanism is provided at the top of the sealing plate 1, which automatically closes the main valve when a gas leak is detected. Both the sealing plate 1 and the sealing plate 2 have through holes at their centers, allowing the intake and exhaust pipes on both sides of the main valve to pass through. A sealing mechanism 1 is provided at the center of the sealing plate 1, and a sealing mechanism 2 is provided at the center of the sealing plate 2. Both sealing mechanisms 1 and 2 are used to seal the periphery of the intake and exhaust pipes. An airbag 1 is fixedly installed between the sealing plate 1 and the sealing plate 2, and the airbag 1 cooperates with the sealing plate. 1. The sealing plate 2 forms a sealed space to seal the main valve. The sealing plate 2 is equipped with a ventilation mechanism for the circulation of indoor and outdoor air. A telescopic rod is fixedly installed at the top of the sealing plate 2. The telescopic rod can extend and retract in multiple sections, with each section being sealed and slidably connected. A telescopic control mechanism is provided on the side of the telescopic rod to control its extension and retraction. A connecting rod 1 is fixedly installed at the top of the telescopic rod. An electromagnet 1 is fixedly installed at the bottom of the connecting rod 1. An electromagnet 2 is fixedly installed at the bottom of the electromagnet 1. A locking plate is connected to the bottom of the electromagnet 1. A detector is fixedly connected to the bottom of the locking plate. A hole 2 is provided on the sealing plate 2 directly below the detector. The detector is equipped with a locking mechanism. The detector can be inserted into the hole 2 to seal the hole 2 and locked in the hole 2 by the locking mechanism, thereby enabling the detector to switch between detecting indoor and the aforementioned sealed space.

[0005] Preferably, the mounting plate one is provided with a guide rail one on the side facing the sealing plate one, and a slider is provided inside the guide rail one to slide up and down, and the slider is fixedly connected to the sealing plate two.

[0006] Preferably, the valve closing mechanism includes a storage cavity two opened at the top of the sealing plate one, a guide rail three provided at the bottom of the storage cavity two along the length direction of the storage cavity two, an electric slider one slidably provided on the guide rail three, a connecting plate fixedly provided at the top of the electric slider one, a shaft rotatably provided on the connecting plate, a sealing cover one fixedly provided on one side of the connecting plate, a motor one provided inside the sealing cover one, the output shaft of the motor one fixedly connected to the shaft, a rotating plate one fixedly provided on the outer circular surface of the shaft, a guide rail four provided at the end of the rotating plate one away from the shaft one, an electric slider two slidably provided on the guide rail four, a mounting plate two fixedly provided on one side of the electric slider two, a rotating plate two rotatably provided on one side of the mounting plate two, rotating arms symmetrically fixedly provided on the rotating plate two, a sealing cover two fixedly provided on the side of the mounting plate two away from the rotating plate two, a motor two provided inside the sealing cover two, and the output shaft of the motor two fixedly connected to the rotating plate two.

[0007] Preferably, both the sealing plate one and the sealing plate two have a storage cavity one on their respective sides. The two ends of the airbag one are respectively fixedly installed in the storage cavities one on both sides. The airbag one is stored in the storage cavities one on both sides in the folded state. An inflation valve two is fixedly provided at the bottom of the sealing plate one. The inflation valve two is in communication with the inside of the airbag one.

[0008] Preferably, the sealing mechanism includes an airbag II fixedly disposed inside the inner wall of the central hole of the sealing plate, an inflation valve I fixedly disposed at the bottom of the sealing plate I and communicating with the airbag II, and a solenoid valve II fixedly disposed at the bottom of the inflation valve I.

[0009] Preferably, an air pump is provided on one side of the sealing plate, and a second pipe is fixedly provided at the air inlet of the air pump, which is connected to the outside. A third pipe is fixedly provided at the air outlet of the air pump, and the second inflation valve and the second solenoid valve are fixedly connected and communicate with each other in the third pipe.

[0010] Preferably, the second sealing mechanism includes a movable cavity 1 opened in the inner wall of the central hole of the second sealing plate. The movable cavity 1 is provided with a movable plate 1 arranged in a ring array. The bottom of the movable cavity 1 is provided with an electric telescopic rod 2 corresponding to the ring array of the movable plate 1 and fixedly provided. The telescopic end of each electric telescopic rod 2 faces the center of the array, and the telescopic end of each electric telescopic rod 2 is fixedly connected to the corresponding movable plate 1.

[0011] Preferably, each of the movable plates is fixedly provided with a sealing ring on the side near the center of the sealing plate.

[0012] Preferably, the ventilation mechanism includes ventilation holes arranged in a circular array that run vertically through the sealing plate 2. A pipe 4 is fixedly provided on the top of the sealing plate 2, connecting each of the ventilation holes. A solenoid valve 1 is fixedly provided at the main air outlet of the pipe 4. A pipe 1 is fixedly connected to the outlet of the solenoid valve 1, and the pipe 1 is connected to the outside.

[0013] Preferably, the telescopic control mechanism includes a guide plate 1 fixedly mounted on the top of the sealing plate 2, a guide rail 2 provided on one side of the guide plate 1, an electric slider 3 slidably mounted on the guide rail 2, an mounting plate 3 fixedly connected to one side of the electric slider 3, an electric telescopic rod 1 fixedly mounted on the top of the mounting plate 3, and the top of the electric telescopic rod 1 fixedly connected to the top of the innermost section of the telescopic rod.

[0014] Preferably, the locking mechanism includes two symmetrically arranged movable cavities inside the locking plate, and pins are slidably arranged on both sides of the two movable cavities. One side of the inner wall of each of the two movable cavities is fixedly connected to the pin on the same side by a spring. A hole is opened at the center of the top of the locking plate corresponding to the electromagnet.

[0015] Preferably, the inner wall of the second hole has pin holes on both sides corresponding to the pins, and a sealing ring two is fixedly provided on one side of the top of the inner wall of the second hole.

[0016] Preferably, the bottom inner side of the telescopic rod has a movable cavity three that passes through the sealing plate two. A movable plate two is provided in the movable cavity three that moves up and down. A guide plate two is fixedly provided at the bottom opening of the movable cavity three. A connecting rod two is provided through the center of the guide plate two and slides up and down. The side of the connecting rod two away from the guide plate two is fixedly connected to the movable plate two. The movable plate two is located on one side of the movable cavity three and is fixedly connected to the guide plate two by a spring one.

[0017] Preferably, a movable cavity four is provided at the bottom of the side wall of the outermost section of the telescopic rod, a movable plate three is slidably provided in the movable cavity four, a guide plate three is fixedly provided on the side of the movable cavity four near the telescopic rod, a connecting rod three is slidably provided through the center of the guide plate three, the side of the connecting rod three away from the guide plate three is fixedly connected to the movable plate three, and the movable plate three is fixedly connected to the guide plate three on the side of the movable cavity four by a spring two.

[0018] Preferably, the size of the internal hole of the sealing plate is larger than the size of the main valve.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. By starting the air pump, airbag one and airbag two are inflated, causing airbag two to gradually expand, thereby squeezing out the air pipe and sealing it. As air is filled into airbag one, airbag one gradually expands and pushes sealing plate two to move. At this time, sealing plate two moves from the air outlet side of the main valve to the air inlet side under the guidance of the slider. Then, by controlling each electric telescopic rod two to extend, all moving plates one are moved out of moving chamber one and pressed against the outer circle surface of the air inlet pipe to seal it, thereby achieving the sealing of the main valve.

[0021] 2. By reciprocating the extension and retraction of the electric telescopic rod, the gas in the sealed chamber is quickly discharged to the outside. Then, the concentration of combustible gas in the sealed chamber is detected by the detector to determine whether the leak is caused by the main valve not being closed or not being closed tightly, and to prevent further leakage. If the detector detects a decrease in the concentration of combustible gas, it is determined that the leak is caused by the connecting pipe or the stove. The electric telescopic rod is reciprocated to continue to extend and retract, thereby discharging the gas in the room to the outside until the concentration of combustible gas in the room drops below the safe value, so as to avoid the concentration of combustible gas in the room being too high and reduce safety hazards.

[0022] 3. If the detector detects that the gas concentration still exceeds the safety value after a period of time, it is determined that the leakage is caused by the aging of the main valve seal. By continuously controlling the electric telescopic rod to extend and retract, the gas in the room and the gas leaking from the main valve are discharged to the outside, so as to reduce the concentration of combustible gas in the room. Any gas that leaks again is also discharged to the outside through the pipe to avoid the leaked gas affecting the room. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first-view three-dimensional structural diagram of an embodiment of the present invention;

[0025] Figure 2 This is a first-view three-dimensional structural diagram of the embodiment of the present invention with the airbag removed;

[0026] Figure 3 This is a second-view three-dimensional structural diagram of the embodiment of the present invention with the first airbag removed;

[0027] Figure 4 This is a third-view three-dimensional structural diagram of the embodiment of the present invention with the first airbag removed;

[0028] Figure 5This is a cross-sectional three-dimensional structural diagram of the embodiment of the present invention with the airbag removed;

[0029] Figure 6 This is a three-dimensional structural diagram of the electromagnet and the locking plate in an embodiment of the present invention;

[0030] Figure 7 This is a cross-sectional perspective view of the locking plate in an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional perspective view of the sealing cover and the motor in an embodiment of the present invention.

[0032] Figure 9 This is a cross-sectional perspective view of the sealing cover 2 and the motor 2 in an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the internal structure of the sealing plate two in an embodiment of the present invention;

[0034] Figure 11 This is an embodiment of the present invention. Figure 1 Enlarged view of point A in the middle;

[0035] Figure 12 This is an embodiment of the present invention. Figure 2 Enlarged view of point B in the middle;

[0036] Figure 13 This is an embodiment of the present invention. Figure 3 Enlarged view of point C in the middle;

[0037] Figure 14 This is an embodiment of the present invention. Figure 3 Enlarged view of point D;

[0038] Figure 15 This is an embodiment of the present invention. Figure 3 Enlarged view of point E in the middle;

[0039] Figure 16 This is an embodiment of the present invention. Figure 3 Enlarged diagram at point F;

[0040] Figure 17 This is an embodiment of the present invention. Figure 4 Enlarged diagram of point G in the middle;

[0041] Figure 18 This is an embodiment of the present invention. Figure 5 Enlarged schematic diagram of section H in the middle.

[0042] In the diagram: 11. Sealing plate one; 12. Sealing plate two; 13. Mounting plate one; 14. Slider; 15. Guide rail one; 16. Pipe one; 17. Solenoid valve one; 18. Pipe two; 19. Air pump; 20. Pipe three; 21. Pipe four; 22. Airbag one; 23. Telescopic rod; 24. Guide plate one; 241. Guide rail two; 25. Electric telescopic rod one; 26. Connecting rod one; 27. Electromagnet one; 28. Storage cavity one; 29. ​​Connecting block; 30. Vent hole; 31. Moving cavity one; 32. Moving plate one; 321. Sealing ring one; 33. Locking plate; 331. Moving cavity two; 332. Hole one; 34. Detector; 36. Electric telescopic rod two; 37. Electromagnet two; 38. Hole two; 381. Pin hole; 382. Sealing ring two ; 41. Airbag II; 42. Storage cavity II; 43. Guide rail III; 44. Electric slider I; 45. Connecting plate; 46. Sealing cover I; 461. Motor I; 47. Shaft; 48. Rotating plate I; 49. Guide rail IV; 50. Electric slider II; 51. Mounting plate II; 52. Rotating plate II; 53. Rotating arm; 54. Sealing cover II; 541. Motor II; 55. Electric slider III; 56. Mounting plate III; 57. Solenoid valve II; 58. Inflation valve I; 59. Moving cavity III; 60. Guide plate II; 61. Connecting rod II; 62. Spring I; 63. Moving plate II; 64. Moving cavity IV; 65. Moving plate III; 66. Spring II; 67. Connecting rod III; 68. Guide plate III; 69. Inflation valve II; 70. Pin; 71. Spring III. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] Combined with appendix Figures 1-18A household combustible gas detector includes a mounting plate 13. A connecting block 29 is fixedly mounted on the bottom of the mounting plate 13. A sealing plate 11 is fixedly mounted on one side of the connecting block 29. A movable sealing plate 22 is mounted on one side of the mounting plate 13, directly above the sealing plate 11. A valve closing mechanism is located at the top of the sealing plate 11. When a gas leak is detected, the valve closing mechanism automatically closes the main valve. Both the sealing plate 11 and the sealing plate 22 have through holes at their centers, allowing the intake and exhaust pipes on both sides of the main valve to pass through. A sealing mechanism 1 is located at the center of the sealing plate 11, and a sealing mechanism 2 is located at the center of the sealing plate 22. Both sealing mechanisms 1 and 2 are used to seal the periphery of the intake and exhaust pipes. An airbag 22 is fixedly installed between the sealing plate 11 and the sealing plate 22. The airbag 22, in conjunction with the sealing plate 11 and the sealing plate 22, forms a sealed space. The main valve is sealed. A ventilation mechanism is provided on the sealing plate 12 for the circulation of indoor and outdoor air. A telescopic rod 23 is fixedly provided on the top of the sealing plate 12. The telescopic rod 23 can extend and retract in multiple sections, and each section is sealed and slidably connected. A telescopic control mechanism is provided on the side of the telescopic rod 23 to control its extension and retraction. A connecting rod 26 is fixedly provided at the top of the telescopic rod 23. An electromagnet 27 is fixedly provided at the bottom of the connecting rod 26. An electromagnet 37 is fixedly provided at the bottom of the electromagnet 27. A locking plate 33 is connected to the bottom of the electromagnet 27. A detector 34 is fixedly connected to the bottom of the locking plate 33. A hole 38 is provided on the sealing plate 12 directly below the detector 34. The detector 34 is provided with a locking mechanism. The detector 34 can be inserted into the hole 38 to seal the hole 38 and locked in the hole 38 by the locking mechanism, thereby enabling the detector 34 to switch between indoor and sealed space detection.

[0045] Advantageously, the mounting plate 13 is provided with a guide rail 15 on the side facing the sealing plate 11, and a slider 14 is slidably provided in the guide rail 15, and the slider 14 is fixedly connected to the sealing plate 12.

[0046] Advantageously, the valve closing mechanism includes a second receiving cavity 42 opened at the top of the sealing plate 11. A guide rail 43 is provided at the bottom of the second receiving cavity 42 along its length. An electric slider 44 is slidably mounted on the guide rail 43. A connecting plate 45 is fixedly mounted on the top of the electric slider 44. A shaft 47 is rotatably mounted on the connecting plate 45. A sealing cover 46 is fixedly mounted on one side of the connecting plate 45. A motor 461 is located inside the sealing cover 46. The output shaft of the motor 461 is fixedly connected to the shaft 47. The outer surface of the shaft 47 is fixed. A rotating plate 48 is provided, and a guide rail 49 is provided at one end of the rotating plate 48 away from the shaft 47. An electric slider 50 is slidably mounted on the guide rail 49. A mounting plate 51 is fixedly mounted on one side of the electric slider 50. A rotating plate 52 is rotatably mounted on one side of the mounting plate 51. A rotating arm 53 is symmetrically fixed on the rotating plate 52. A sealing cover 54 is fixedly mounted on the side of the mounting plate 51 away from the rotating plate 52. A motor 541 is provided inside the sealing cover 54. The output shaft of the motor 541 is fixedly connected to the rotating plate 52.

[0047] Advantageously, both the sealing plate 11 and the sealing plate 12 have a storage cavity 28 on one side close to each other. The two ends of the airbag 22 are respectively fixedly installed in the storage cavities 28 on both sides. The airbag 22 is stored in the storage cavities 28 on both sides in the folded state. The bottom of the sealing plate 11 is fixedly provided with an inflation valve 69, which communicates with the inside of the airbag 22.

[0048] Advantageously, the sealing mechanism includes an airbag 41 fixedly disposed inside the inner wall of the central hole of the sealing plate 11, an inflation valve 58 connected to the airbag 41 fixedly disposed at the bottom of the sealing plate 11, and a solenoid valve 57 fixedly disposed at the bottom of the inflation valve 58.

[0049] Advantageously, an air pump 19 is provided on one side of the sealing plate 11. The air inlet of the air pump 19 is fixedly provided with a pipe 18, which is connected to the outside. The air outlet of the air pump 19 is fixedly provided with a pipe 20. The inflation valve 69 and the solenoid valve 57 are fixedly connected and communicate with each other in the pipe 20.

[0050] Advantageously, the second sealing mechanism includes a movable cavity 31 opened in the inner wall of the central hole of the second sealing plate 12. The movable cavity 31 is provided with a movable plate 32 arranged in a ring. The bottom of the movable cavity 31 is provided with an electric telescopic rod 36 arranged in a ring corresponding to the movable plate 32. The telescopic end of each electric telescopic rod 36 faces the center of the array, and the telescopic end of each electric telescopic rod 36 is fixedly connected to the corresponding movable plate 32.

[0051] Advantageously, each of the movable plates 32 is fixedly provided with a sealing ring 321 on the side near the center of the sealing plate 12.

[0052] Advantageously, the ventilation mechanism includes ventilation holes 30 arranged in a circular array through the upper and lower parts of the sealing plate 2 12, and a pipe 4 21 connected to each of the ventilation holes 30 is fixedly provided on the top of the sealing plate 2 12. A solenoid valve 17 is fixedly provided at the main air outlet of the pipe 4 21, and a pipe 16 is fixedly connected to the outlet of the solenoid valve 17. The pipe 16 is connected to the outside.

[0053] Advantageously, the telescopic control mechanism includes a guide plate 24 fixedly mounted on the top of the sealing plate 2 12, a guide rail 241 on one side of the guide plate 24, an electric slider 3 55 slidably mounted on the guide rail 241, an mounting plate 3 56 fixedly connected to one side of the electric slider 3 55, an electric telescopic rod 25 fixedly mounted on the top of the mounting plate 3 56, and the top of the electric telescopic rod 25 fixedly connected to the top of the innermost section of the telescopic rod 23.

[0054] Beneficially, the locking mechanism includes two movable cavities 331 symmetrically arranged inside the locking plate 33, and pins 70 are slidably arranged on both sides of the two movable cavities 331. One side of the inner wall of the two movable cavities 331 on both sides is fixedly connected to the pins 70 on the same side by springs 71. A hole 332 is opened at the top center of the locking plate 33 corresponding to the electromagnet 37.

[0055] Beneficially, the inner wall of the second hole 38 is provided with pin holes 381 corresponding to the pins 70 on both sides, and a sealing ring 382 is fixedly provided on one side of the top of the inner wall of the second hole 38.

[0056] Beneficially, the bottom inner side of the telescopic rod 23 is provided with a movable cavity 59 that penetrates the sealing plate 12. A movable plate 63 is provided inside the movable cavity 59 and moves up and down. A guide plate 60 is fixedly provided at the bottom opening of the movable cavity 59. A connecting rod 61 is provided through the center of the guide plate 60 and slides up and down. The side of the connecting rod 61 away from the guide plate 60 is fixedly connected to the movable plate 63. The movable plate 63 is located on the side of the movable cavity 59 and is fixedly connected to the guide plate 60 by a spring 62.

[0057] Beneficially, the telescopic rod 23 has a movable cavity 64 at the bottom of the side wall of the outermost section. A movable plate 65 is slidably disposed in the movable cavity 64. A guide plate 68 is fixedly disposed on the side of the movable cavity 64 near the telescopic rod 23. A connecting rod 67 is slidably disposed through the center of the guide plate 68. The side of the connecting rod 67 away from the guide plate 68 is fixedly connected to the movable plate 65. The movable plate 65 is fixedly connected to the guide plate 68 on the side of the movable cavity 64 by a spring 66.

[0058] Advantageously, the size of the internal hole of the sealing plate 2 12 is larger than the size of the main valve.

[0059] How to use this invention:

[0060] In the initial state: Sealing plate 11 and sealing plate 2 12 are close to each other and located on the side of the main valve outlet pipe, with the central holes of sealing plate 11 and sealing plate 2 12 passing through the outlet pipe. Airbag 1 22 is housed inside the housing cavity 28 of sealing plate 11 and sealing plate 2 12. Rotating plate 1 48 is housed inside housing cavity 2 42. Solenoid valve 1 17 and solenoid valve 2 57 are both in the open state. Each electric telescopic rod 2 36 is in the shortened state. Moving plate 1 32 is retracted. The electric slider 35 is located at the top of the guide rail 241, and the electric telescopic rod 25 and telescopic rod 23 are in the extended state. The electromagnet 27 is inserted into the hole 332, and both electromagnets 27 and 37 are energized. The pins 70 on both sides are stored in the same side of the moving cavity 331. Springs 62 and 66 are in the relaxed state, and spring 71 is in the stretched state.

[0061] When a gas leak occurs in the kitchen, detector 34 is positioned at its highest point and detects the concentration of combustible gas in the room. When the concentration of combustible gas exceeds the safe limit, the electric slider 35 is controlled to move downwards along guide rail 241, while the electric telescopic rod 1 25 is shortened, thereby causing the locking plate 33 to descend and finally insert into hole 2 38. At the same time, the air pump 19 is activated to inflate airbag 1 22 and airbag 2 41. As air is filled into airbag 2 41, it gradually expands, thereby squeezing out the gas outlet pipe and sealing it. When airbag 2 41 and the gas outlet pipe are completely pressed together and sealed... After sealing, control solenoid valve 2 57 closes, allowing air pump 19 to continue inflating airbag 22. As air is filled into airbag 22, it gradually expands and pushes sealing plate 2 12 to move. At this time, sealing plate 2 12 moves from the outlet side of the main valve to the inlet side under the guidance of slider 14. At this time, sealing plate 2 12 is located around the inlet pipe. After airbag 22 is fully expanded, air pump 19 stops. By controlling each electric telescopic rod 2 36 to extend, all moving plates 1 32 are moved out of moving chamber 1 31 and pressed against the outer surface of the inlet pipe to seal, thereby achieving the sealing of the main valve.

[0062] By starting motor 461, shaft 47 rotates synchronously, which in turn rotates rotating plate 48, bringing it into a vertical position. Then, electric slider 44 moves along guide rail 43 towards the main valve, aligning the center of rotating plate 52 with the rotation center of the main valve switch. Electric slider 50 then moves along guide rail 49 towards the main valve switch, positioning the rotation center of the main valve switch between the two rotating arms 53. At this point, motor 541 starts and rotates rotating plate 52, which in turn rotates the rotating arms 53. If the main valve is a single-arm handle type, the rotating arm 53 on one side will press against the handle, thereby rotating the handle in the desired direction and angle to close the main valve. If the main valve switch is a knob type, the rotating arm 53 will be inserted into the hole of the knob switch, thereby controlling the rotating plate 52 to rotate a fixed number of turns in the desired direction to close the main valve. At this time, by de-energizing electromagnets 27 and 37, the locking plate 33 will separate from electromagnet 27, and the pins 70 on both sides will be inserted into the corresponding pin holes 381 under the elastic force of the spring 71 on the same side, locking the locking plate 33 in hole 2. Within 38, the electric telescopic rod 25 is extended, causing the telescopic rod 23 to rise. During this ascent, the indoor gas pressure difference pushes the moving plate 65, causing it to compress the spring 66. This allows indoor air to enter the telescopic rod 23 through the moving cavity 64. Then, the electric telescopic rod 25 is shortened, causing the telescopic rod 23 to descend. This compresses the gas and pushes the moving plate 63, causing it to compress the spring 62. This allows the gas drawn into the telescopic rod 23 to enter the sealed plate 11 and the sealing plate 12 through the moving cavity 59. Inside the sealed cavity, the gas is then discharged to the outdoor side through pipe 16. The electric telescopic rod 25 is repeatedly extended and retracted to quickly discharge the gas in the sealed cavity to the outside. The concentration of combustible gas in the sealed cavity is then detected by detector 34 to determine whether the leak is caused by the main valve not being closed or not being closed tightly, and to prevent further leakage. If the detector 34 detects a decrease in the concentration of combustible gas, it is determined that the leak is caused by the connecting pipe or the stove. The electric telescopic rod 25 is repeatedly extended and retracted to discharge the gas in the room to the outdoor side until the concentration of combustible gas in the room drops below the safe value.

[0063] If, after a period of time, the detector 34 detects that the gas concentration still exceeds the safe value, it is determined that the leakage is caused by the aging of the main valve seal. By controlling the extension of the electric telescopic rod 25, the telescopic rod 23 is raised. During the upward movement, the indoor gas pushes the moving plate 65, causing the moving plate 65 to compress the spring 66, allowing indoor air to enter the telescopic rod 23 through the moving cavity 64. Then, the electric telescopic rod 25 is shortened, causing the telescopic rod 23 to descend, which in turn compresses the gas and pushes the moving plate 63, causing the moving plate 63 to compress the spring 62, allowing the gas drawn into the telescopic rod 23 to enter the sealed cavity formed by the sealing plate 11 and the sealing plate 12 through the moving cavity 59. The gas is then discharged to the outdoor side through the pipe 16. By continuously controlling the extension and retraction of the electric telescopic rod 25, the indoor gas and the gas leaking from the main valve are discharged to the outside, reducing the concentration of combustible gas indoors, and the gas that leaks again is also discharged to the outside through the pipe 16.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A household combustible gas detector, comprising a mounting plate, characterized in that: A connecting block is fixedly mounted on the bottom of the mounting plate 1. A sealing plate 1 is fixedly mounted on one side of the connecting block. A sealing plate 2, which can move up and down, is mounted on one side of the mounting plate 1 and directly above the sealing plate 1. A valve closing mechanism is provided on the top of the sealing plate 1. When a gas leak is detected, the valve closing mechanism can automatically close the main valve. Both the sealing plate 1 and the sealing plate 2 have through holes at their centers, which allow the intake and exhaust pipes on both sides of the main valve to pass through. A sealing mechanism 1 is located at the center of the sealing plate 1, and a sealing mechanism 2 is located at the center of the sealing plate 2. Both sealing mechanisms 1 and 2 are used to seal the periphery of the intake and exhaust pipes. An airbag 1 is fixedly installed between the sealing plate 1 and the sealing plate 2. The airbag 1, together with the sealing plate 1 and the sealing plate 2, can form a sealed space to seal the main valve. The sealing plate 2 is equipped with a ventilation mechanism for the circulation of indoor and outdoor air. A telescopic rod is fixedly installed on the top of the sealing plate 2. The telescopic rod can extend and retract in multiple sections, with each section being sealed and slidably connected. A telescopic control mechanism is provided on the side of the telescopic rod to control its extension and retraction. A connecting rod 1 is fixedly installed at the top of the telescopic rod. An electromagnet 1 is fixedly installed at the bottom of the connecting rod 1. An electromagnet 2 is fixedly installed at the bottom of the electromagnet 1. A locking plate is connected to the bottom of the electromagnet 1. A detector is fixedly connected to the bottom of the locking plate. A hole 2 is provided on the sealing plate 2 directly below the detector. The detector is equipped with a locking mechanism. The detector can be inserted into the hole 2 to seal the hole 2 and locked in the hole 2 by the locking mechanism, thereby enabling the detector to switch between detecting indoor and sealed spaces.

2. A household combustible gas detector according to claim 1, characterized in that: The mounting plate is provided with a guide rail on the side facing the sealing plate. A slider is provided inside the guide rail and slides up and down. The slider is fixedly connected to the sealing plate.

3. A household combustible gas detector according to claim 1, characterized in that: The valve closing mechanism includes a storage cavity 2 opened at the top of the sealing plate 1. A guide rail 3 is provided at the bottom of the storage cavity 2 along its length. An electric slider 1 is slidably mounted on the guide rail 3. A connecting plate is fixedly mounted at the top of the electric slider 1. A shaft is rotatably mounted on the connecting plate. A sealing cover 1 is fixedly mounted on one side of the connecting plate. A motor 1 is located inside the sealing cover 1. The output shaft of the motor 1 is fixedly connected to the shaft. A rotating plate 1 is fixedly mounted on the outer surface of the shaft. A guide rail 4 is provided at the end of the rotating plate 1 away from the shaft 1. An electric slider 2 is slidably mounted on the guide rail 4. A mounting plate 2 is fixedly mounted on one side of the electric slider 2. A rotating plate 2 is rotatably mounted on one side of the mounting plate 2. Rotating arms are symmetrically fixed on the rotating plate 2. A sealing cover 2 is fixedly mounted on the side of the mounting plate 2 away from the rotating plate 2. A motor 2 is located inside the sealing cover 2. The output shaft of the motor 2 is fixedly connected to the rotating plate 2.

4. A household combustible gas detector according to claim 1, characterized in that: Both sealing plate one and sealing plate two have a storage cavity one on their respective sides. The two ends of airbag one are fixedly installed in the storage cavities one on both sides. Airbag one is stored in the storage cavities one on both sides in the folded state. An inflation valve two is fixedly installed at the bottom of sealing plate one. The inflation valve two communicates with the inside of airbag one. Sealing mechanism one includes airbag two fixedly installed in the inner wall of the central hole of sealing plate one. An inflation valve one communicating with airbag two is fixedly installed at the bottom of sealing plate one. A solenoid valve two is fixedly installed at the bottom of inflation valve one. An air pump is installed on one side of sealing plate one. Pipe two is fixedly installed at the air inlet of the air pump. Pipe two communicates with the outside. Pipe three is fixedly installed at the air outlet of the air pump. The inflation valve two and solenoid valve two are fixedly connected and communicate with each other in pipe three.

5. A household combustible gas detector according to claim 1, characterized in that: The second sealing mechanism includes a movable cavity 1 opened in the inner wall of the central hole of the second sealing plate. The movable cavity 1 is arranged in a ring array of movable plates 1. The bottom of the movable cavity 1 is fixedly provided with an electric telescopic rod 2 corresponding to the ring array of movable plates 1. The telescopic end of each electric telescopic rod 2 faces the center of the array. The telescopic end of each electric telescopic rod 2 is fixedly connected to the corresponding movable plate 1. A sealing ring 1 is fixedly provided on the side of each movable plate 1 near the center of the second sealing plate.

6. A household combustible gas detector according to claim 1, characterized in that: The ventilation mechanism includes ventilation holes arranged in a circular array that run vertically through the sealing plate 2. A pipe 4 is fixedly provided on the top of the sealing plate 2, connecting each of the ventilation holes. A solenoid valve 1 is fixedly provided at the main air outlet of the pipe 4. A pipe 1 is fixedly connected to the outlet of the solenoid valve 1, and the pipe 1 is connected to the outside.

7. A household combustible gas detector according to claim 1, characterized in that: The telescopic control mechanism includes a guide plate 1 fixedly mounted on the top of the sealing plate 2, a guide rail 2 on one side of the guide plate 1, an electric slider 3 slidably mounted on the guide rail 2, an mounting plate 3 fixedly connected to one side of the electric slider 3, an electric telescopic rod 1 fixedly mounted on the top of the mounting plate 3, and the top of the electric telescopic rod 1 fixedly connected to the top of the innermost section of the telescopic rod.

8. A household combustible gas detector according to claim 1, characterized in that: The locking mechanism includes two symmetrically arranged movable cavities inside the locking plate. Pins are slidably arranged on both sides of the two movable cavities. One side of the inner wall of each of the two movable cavities is fixedly connected to the pin on the same side by a spring. A hole is opened at the top center of the locking plate corresponding to the electromagnet. A pin hole is opened on the inner wall of the hole corresponding to the pins on both sides. A sealing ring is fixedly arranged on the top side of the inner wall of the hole.

9. A household combustible gas detector according to claim 1, characterized in that: The telescopic rod has a movable cavity three that passes through the sealing plate two at its inner bottom. A movable plate two is installed inside the movable cavity three that moves up and down. A guide plate two is fixedly installed at the bottom opening of the movable cavity three. A connecting rod two is installed through the center of the guide plate two and slides up and down. The side of the connecting rod two away from the guide plate two is fixedly connected to the movable plate two. The movable plate two is located on one side of the movable cavity three and is fixedly connected to the guide plate two by a spring one.

10. A household combustible gas detector according to claim 1, characterized in that: The telescopic rod has a movable cavity four at the bottom of the side wall of the outermost section. A movable plate three is slidably disposed in the movable cavity four. A guide plate three is fixedly disposed on the side of the movable cavity four near the telescopic rod. A connecting rod three is slidably disposed through the center of the guide plate three. The side of the connecting rod three away from the guide plate three is fixedly connected to the movable plate three. The movable plate three is located on the side of the movable cavity four and is fixedly connected to the guide plate three by a spring two.

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