A detachable gas leak alarm

Abstract

The present invention belongs to the technical field of leakage alarm devices, and in particular to a detachable gas leakage alarm. A spring clamping structure is used to achieve a quick and stable connection between a wall-mounted base and a circular support. The adhesive at the bottom of the wall-mounted base can be attached to a high position on the wall, eliminating the need for climbing up to remove screws, thereby achieving the purpose of quick disassembly. The air permeable cover of this product is wrapped around the outer side of a semiconductor gas sensor to prevent excessive oil smoke from sticking to the gas sensitive element and causing a false alarm of the semiconductor gas sensor. The semiconductor gas sensor can complete angle rotation through a stepper motor to expand the contact area with the flue gas. When the semiconductor gas sensor alarms, the exhaust pipe passes the flue gas into the detection bottle after double water absorption, and the propagation speed or frequency of the sound wave on the surface of the material will change. By measuring the speed or frequency change of the sound wave, it is accurately determined whether it is a gas leak to avoid false alarms.

Description

Technical Field

[0001] The invention belongs to the technical field of leakage alarm devices, and in particular relates to a detachable gas leakage alarm. Background Art

[0002] The gas sensor built into a general gas leak alarm can detect low-concentration combustible gas in the surrounding environment. The gas concentration signal detected by the sensor will be converted into an electrical signal and transmitted to the controller or control circuit through the sampling circuit. This step is to convert the gas concentration into a processable electrical signal for subsequent processing. If the detected combustible gas concentration exceeds the preset threshold, it is judged that a gas leak exists and an alarm is sounded.

[0003] The cooking process, such as boiling Chinese medicine and heating ingredients, will produce a lot of smoke indoors. The gas alarm may give a false alarm due to the smell or smoke. The sensing components of traditional gas alarms are mostly in direct contact with the air. If they are covered with a certain amount of dust and oil smoke, their sensitivity and accuracy will decrease, which may also lead to false alarms or malfunction. Traditional gas alarms are generally installed close to the gas stove, with a small installation space and it is inconvenient to remove the bolts.

[0004] Therefore, a detachable gas leakage alarm is designed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a detachable gas leakage alarm to solve the problems of rapid disassembly of the alarm and prevention of false alarms.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detachable gas leak alarm, including a quick-detachable dual alarm, the quick-detachable dual alarm including a wall-mounted base, a circular support, a rotating plate, a Z-axis rotating assembly, a breathable cover, a semiconductor gas sensor and a re-detection assembly, the wall-mounted base is adhesively connected to the wall above the gas stove, the circular support is clamped inside the wall-mounted base, the rotating plate is rotatably connected to the top of the circular support, the Z-axis rotating assembly is movably connected to the upper end of the rotating plate, the breathable cover is fixedly connected to the outside of the Z-axis rotating assembly, the semiconductor gas sensor is installed inside the breathable cover, the re-detection assembly is welded to the top outside of the breathable cover, and a clamping assembly is also provided on the inner side of the wall-mounted base;

[0007] The circular support is clamped with the inner side of the wall base through the clamping assembly. The wall base is used to be bonded to the wall above the gas stove. The rotating plate is used to adjust the orientation of the breathable cover. The breathable cover is used to protect the semiconductor gas sensitive element of the semiconductor gas sensor from being excessively wrapped by oil and dirt. The semiconductor gas sensor is used to measure the changes in the electrical properties of the semiconductor material in the gas environment to detect the type and concentration of the gas. The re-detection assembly detects the gas more accurately by measuring the changes in the surface acoustic waves of the piezoelectric material after filtering the moisture.

[0008] Preferably, the Z-axis rotation assembly includes an oil-proof cover, a stepper motor, an ear plate sleeve, a drive shaft, a hollow sleeve frame, a small motor and a connecting shaft. The oil-proof cover is installed on the outside of the ear plate sleeve, and the stepper motor is installed inside the oil-proof cover for connecting the drive shaft. The drive shaft is rotatably connected to the inside of the ear plate sleeve for tightly fitting the hollow sleeve frame. The ear plate sleeve is fixedly connected to the top of the rotating plate, and the small motor is installed on the inner side of the hollow sleeve frame for docking with the connecting shaft. The connecting shaft passes through one side of the breathable cover and is slidably connected to the inner surface of the breathable cover.

[0009] Preferably, a limiting plate, a support rod and an air intake baffle are also provided inside the air hood, the limiting plate is fixedly connected to one end of the connecting shaft, the support rod is fixedly connected to both sides of the limiting plate, and the air intake baffle is welded to the outer side of the support rod to block the air intake and exhaust ends of the air hood.

[0010] Preferably, the clamping assembly includes a blind hole, a compression spring, a telescopic rod and a clamping ball, the blind hole is arranged on the inner side of the wall-attached base, the two sides of the compression spring are respectively fixedly connected to the clamping ball and the surface of the wall-attached base, the telescopic rod is installed on the inner side of the compression spring to limit the moving path of the clamping ball, and the outer side of the clamping ball abuts against the surface of the circular support.

[0011] Preferably, a slot matching the size of the locking ball is also provided inside the circular support.

[0012] Preferably, plug-in blocks and slots with sizes matching each other are further provided on opposite sides of the circular support and the wall-mounted base.

[0013] Preferably, the re-detection component includes an exhaust pipe, a filter box, a small air pump, a one-way valve, a detection bottle and a surface acoustic wave gas sensor. The exhaust pipe passes through the top of the breathable cover and fits tightly with the inner wall of the breathable cover. The small air pump is installed on the outside of the exhaust pipe, the filter box is sleeved on the outside of the exhaust pipe, the one-way valve is installed on the outside of the exhaust pipe, the detection bottle is threadedly connected below the outlet end of the exhaust pipe, and the surface acoustic wave gas sensor is installed at the bottom of the detection bottle.

[0014] Preferably, a pull-out frame and a styrene sponge are further provided on the outside of the filter box, the pull-out frame is slidably connected to the inside of the filter box, and the styrene sponge is installed inside the pull-out frame to absorb excess moisture in the gas.

[0015] Preferably, a thread groove and a hollow screw with matching sizes are further provided at the connection between the exhaust pipe and the detection bottle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, a spring clamping structure is used to realize a quick and stable connection between the wall base and the circular support. The adhesive at the bottom of the wall base can be attached to a high position on the wall, eliminating the need for climbing up to remove the screws, thereby achieving the purpose of quick disassembly.

[0018] 2. In the present invention, the breathable cover of this product is wrapped around the outside of the semiconductor gas sensor to prevent excessive oil smoke from sticking to the gas sensitive element and causing false alarms of the semiconductor gas sensor. The semiconductor gas sensor can complete angle rotation through a stepper motor, thereby facilitating adjustment of the monitoring position and expanding the contact area with the flue gas.

[0019] 3. In the present invention, when the semiconductor gas sensor alarms, the exhaust pipe passes the flue gas into the detection bottle after double water absorption. When the adsorbed molecules increase the mass of the surface acoustic wave gas sensor, the propagation speed or frequency of the sound wave on the surface of the material will change. By measuring the speed or frequency change of the sound wave, it is accurately determined whether it is a gas leak to avoid false alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the bottom of the wall-mounted base in the present invention;

[0023] Figure 3 This is a diagram of the connection between the plug-in block and the circular support in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the clamping assembly in the present invention;

[0025] Figure 5 It is a rotation schematic diagram of the Z-axis rotation component in the present invention;

[0026] Figure 6 This is a ventilation effect diagram of the breathable cover in the present invention;

[0027] Figure 7 This is an exploded view of the filter box and the drawer frame of the present invention;

[0028] Figure 8 It is a cross-sectional view of the connection between the exhaust pipe and the detection bottle in the present invention.

[0029] In the figure:

[0030] 1. Quick-detachable dual alarm; 2. Wall base; 3. Round support; 4. Rotating plate; 5. Z-axis rotating assembly; 6. Breathable cover; 7. Semiconductor gas sensor; 8. Re-detection assembly; 9. Snap-on assembly; 10. Oil-proof cover; 11. Stepper motor; 12. Ear plate sleeve; 13. Drive shaft; 14. Hollow sleeve; 15. Small motor; 16. Connecting shaft; 17. Limit plate; 18. Support rod; 19. Inlet baffle; 20. Blind hole; 21. Compression spring; 22. Telescopic rod; 23. Card ball; 24. Card slot; 25. Plug-in block; 26. Slot; 27. Exhaust duct; 28. Filter box; 29. ​​Small air pump; 30. One-way valve; 31. Detection bottle; 32. Surface acoustic wave gas sensor; 33. Pull-out frame; 34. Styrene sponge; 35. Threaded groove; 36. Hollow screw. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0032] like Figure 1-8A detachable gas leak alarm shown includes a quick-detachable dual alarm 1, which includes a wall-mounted base 2, a circular support 3, a rotating plate 4, a Z-axis rotating component 5, a breathable cover 6, a semiconductor gas sensor 7 and a re-detection component 8. The wall-mounted base 2 is adhesively connected to the wall above the gas stove, the circular support 3 is clamped inside the wall-mounted base 2, the rotating plate 4 is rotatably connected to the top of the circular support 3, the Z-axis rotating component 5 is movably connected to the upper end of the rotating plate 4, the breathable cover 6 is fixedly connected to the outer side of the Z-axis rotating component 5, the semiconductor gas sensor 7 is installed inside the breathable cover 6, the re-detection component 8 is welded to the top outer side of the breathable cover 6, and a clamping component 9 is also provided on the inner side of the wall-mounted base 2;

[0033] The circular support 3 is clamped with the inner side of the wall base 2 through the clamping assembly 9. The wall base 2 is used to be bonded to the wall above the gas stove. The rotating plate 4 is used to adjust the orientation of the air cover 6. The air cover 6 is used to protect the semiconductor gas sensitive element of the semiconductor gas sensor 7 from being excessively wrapped by oil and dirt. The semiconductor gas sensor 7 is used to measure the changes in the electrical properties of the semiconductor material in the gas environment to detect the type and concentration of the gas. The detection assembly 8 performs more accurate gas detection by measuring the changes in the surface acoustic waves of the piezoelectric material after filtering the moisture.

[0034] The spring clamping structure is used to realize the quick and stable connection between the wall base 2 and the circular support 3. The adhesive on the bottom of the wall base 2 can be attached to the high position of the wall, eliminating the work process of climbing up to remove the screws, thereby achieving the purpose of quick disassembly. The air permeable cover 6 of this product is wrapped around the outside of the semiconductor gas sensor 7 to prevent excessive oil smoke from sticking to the gas sensitive element and causing false alarms of the semiconductor gas sensor 7. The semiconductor gas sensor 7 can complete angle rotation through the stepping motor 11, thereby facilitating the adjustment of the monitoring position and expanding the contact area with the smoke.

[0035] The Z-axis rotating assembly 5 includes an oil-proof cover 10, a stepper motor 11, an ear plate sleeve 12, a driving shaft 13, a hollow sleeve frame 14, a small motor 15 and a connecting shaft 16. The oil-proof cover 10 is installed on the outside of the ear plate sleeve 12, and the stepper motor 11 is installed inside the oil-proof cover 10 for connecting the driving shaft 13. The driving shaft 13 is rotatably connected to the inside of the ear plate sleeve 12 for tightly fitting the hollow sleeve frame 14. The ear plate sleeve 12 is fixedly connected to the top of the rotating plate 4. The small motor 15 is installed on the inner side of the hollow sleeve frame 14 for docking with the connecting shaft 16. The connecting shaft 16 passes through one side of the breathable cover 6 and is slidably connected to the inner surface of the breathable cover 6.

[0036] In order to expand the contact area between the semiconductor gas sensor 7 and the flue gas, the rotating plate 4 can be rotated to control the breathable cover 6 to a suitable position, and then the stepper motor 11 is started to drive the drive shaft 13 and the hollow sleeve 14 to rotate. The hollow sleeve 14 drives the breathable cover 6 and the internal semiconductor gas sensor 7 to rotate finely through the outermost connecting shaft 16, so that the gas sensitive element of the semiconductor gas sensor 7 can increase the contact area with the flue gas, thereby improving the detection accuracy.

[0037] A limiting plate 17, a support rod 18 and an air intake baffle 19 are also provided inside the air hood 6. The limiting plate 17 is fixedly connected to one end of the connecting shaft 16, the support rod 18 is fixedly connected to both sides of the limiting plate 17, and the air intake baffle 19 is welded to the outer side of the support rod 18 to block the air intake and exhaust ends of the air hood 6.

[0038] When the smoke is too large, the product can drive the small motor 15 inside the hollow sleeve 14 to drive the connecting shaft 16 to rotate, and the connecting shaft 16 drives the limit plate 17 to rotate, and the limit plate 17 drives the air intake baffle 19 through the support rod 18. Since the size of the air intake baffle 19 is larger than the air inlet of the air hood 6, the air intake baffle 19 can freely adjust the air intake volume of the air hood 6 during rotation, thereby preventing the semiconductor gas sensor 7 from being blocked by excessive oil smoke, thereby improving the protection effect of the semiconductor gas sensor 7.

[0039] The clamping assembly 9 includes a blind hole 20, a compression spring 21, a telescopic rod 22 and a clamping ball 23. The blind hole 20 is arranged on the inner side of the wall base 2. The two sides of the compression spring 21 are respectively fixedly connected to the clamping ball 23 and the surface of the wall base 2. The telescopic rod 22 is installed on the inner side of the compression spring 21 to limit the moving path of the clamping ball 23. The outer side of the clamping ball 23 abuts against the surface of the circular support 3.

[0040] A locking groove 24 matching the size of the locking ball 23 is also provided inside the circular support 3 .

[0041] The opposite sides of the circular support 3 and the wall base 2 are also provided with a plug-in block 25 and a slot 26 with sizes matching each other.

[0042] During installation, the circular support 3 is inserted into the wall base 2 until the slot 24 is flush with the locking ball 23. Since the compression spring 21 is always in a compressed state after the circular support 3 is inserted, the locking ball 23 is quickly pushed back and completes the multi-directional resistance to the circular ball under the elastic support of the spring, thereby stabilizing the circular support 3. Then, the plug-in block 25 is pushed toward each other and pushed into the slot 26 of the circular support 3 to strengthen the connection. After that, the adhesive of the wall base 2 can be attached to the high position of the wall near the gas stove. There is no need for manual drilling, and it is easy to disassemble.

[0043] The re-detection component 8 includes an exhaust pipe 27, a filter box 28, a small air pump 29, a one-way valve 30, a detection bottle 31 and a surface acoustic wave gas sensor 32. The exhaust pipe 27 passes through the top of the breathable cover 6 and fits tightly with the inner wall of the breathable cover 6. The small air pump 29 is installed on the outside of the exhaust pipe 27, the filter box 28 is sleeved on the outside of the exhaust pipe 27, the one-way valve 30 is installed on the outside of the exhaust pipe 27, the detection bottle 31 is threadedly connected below the outlet end of the exhaust pipe 27, and the surface acoustic wave gas sensor 32 is installed at the bottom of the detection bottle 31.

[0044] A pull-out frame 33 and a styrene sponge 34 are also provided on the outside of the filter box 28. The pull-out frame 33 is slidably connected to the inside of the filter box 28, and the styrene sponge 34 is installed inside the pull-out frame 33 to absorb excess moisture in the gas.

[0045] The connection between the exhaust pipe 27 and the detection bottle 31 is also provided with a thread groove 35 and a hollow screw 36 whose sizes match each other.

[0046] The hollow screw 36 on the top of the detection bottle 31 is screwed into the threaded groove 35 of the exhaust pipe 27 to complete the installation. When the detection value of the semiconductor gas sensor 7 exceeds the set value, the valve flap of the one-way valve 30 opens, and the running small air pump 29 sucks the oil fume from the exhaust pipe 27 into the detection bottle 31. This process will pass through two groups of filter boxes 28, and the water in the fume will be fully filtered through the internal multiple groups of styrene sponges 34 to prevent false alarms; then it will be sent along the top of the detection bottle 31. When the adsorbed molecules increase the mass of the surface acoustic wave gas sensor 32, the propagation speed or frequency of the sound wave on the surface of the material will change. By measuring the speed or frequency change of the sound wave, the volume fraction of the gas can be measured, and then it can be accurately determined whether the gas exceeds the gas standard, thereby enhancing the anti-false alarm effect.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detachable gas leak alarm, comprising a quick-detachable dual alarm (1), characterized in that: The quick-detachable dual alarm (1) comprises a wall-mounted base (2), a circular support (3), a rotating plate (4), a Z-axis rotating assembly (5), a breathable cover (6), a semiconductor gas sensor (7) and a re-detection assembly (8), wherein the wall-mounted base (2) is adhesively connected to the top of the wall near the gas stove, the circular support (3) is snap-fitted to the inside of the wall-mounted base (2), the rotating plate (4) is rotatably connected to the top of the circular support (3), the Z-axis rotating assembly (5) is movably connected to the upper end of the rotating plate (4), the breathable cover (6) is fixedly connected to the outside of the Z-axis rotating assembly (5), the semiconductor gas sensor (7) is installed inside the breathable cover (6), the re-detection assembly (8) is welded to the outside of the top of the breathable cover (6), and a snap-fit ​​assembly (9) is also provided on the inside of the wall-mounted base (2); The re-detection component (8) comprises an exhaust pipe (27), a filter box (28), a small air pump (29), a one-way valve (30), a detection bottle (31) and a surface acoustic wave gas sensor (32); the exhaust pipe (27) passes through the top of the breathable cover (6) and is tightly fitted with the inner wall surface of the breathable cover (6); the small air pump (29) is installed on the outside of the exhaust pipe (27); the filter box (28) is sleeved on the outside of the exhaust pipe (27); the one-way valve (30) is installed on the outside of the exhaust pipe (27); the detection bottle (31) is threadedly connected to the bottom of the exhaust end of the exhaust pipe (27); and the surface acoustic wave gas sensor (32) is installed at the bottom of the detection bottle (31); A pull-out frame (33) and a styrene sponge (34) are also provided on the outside of the filter box (28); the pull-out frame (33) is slidably connected to the inside of the filter box (28); and the styrene sponge (34) is installed inside the pull-out frame (33) to absorb excess moisture in the gas; The circular support (3) is clamped with the inner side of the wall-mounted base (2) through the clamping assembly (9); the wall-mounted base (2) is used to be bonded to the upper side of the wall near the gas stove; the rotating plate (4) is used to adjust the position of the breathable cover (6); the breathable cover (6) is used to protect the semiconductor gas sensitive element of the semiconductor gas sensor (7) from being excessively wrapped by oil and dirt; the semiconductor gas sensor (7) is used to measure the change of the electrical properties of the semiconductor material in the gas environment to detect the type and concentration of the gas; the re-detection assembly (8) detects the gas more accurately by measuring the change of the surface acoustic wave of the piezoelectric material after filtering the moisture.

2. A detachable gas leak alarm according to claim 1, characterized in that: The Z-axis rotating assembly (5) comprises an oil-proof cover (10), a stepper motor (11), an ear plate sleeve (12), a driving shaft (13), a hollow sleeve frame (14), a small motor (15) and a connecting shaft (16); the oil-proof cover (10) is mounted on the outside of the ear plate sleeve (12); the stepper motor (11) is mounted inside the oil-proof cover (10) for connecting the driving shaft (13); the driving shaft (13) is rotatably connected inside the ear plate sleeve (12) for tightly fitting the hollow sleeve frame (14); the ear plate sleeve (12) is fixedly connected to the top of the rotating plate (4); the small motor (15) is mounted on the inside of the hollow sleeve frame (14) for docking with the connecting shaft (16); the connecting shaft (16) passes through one side of the breathable cover (6) and is slidably connected to the inner surface of the breathable cover (6).

3. A detachable gas leak alarm according to claim 2, characterized in that: A limit plate (17), a support rod (18) and an air intake baffle (19) are also provided inside the air vent cover (6); the limit plate (17) is fixedly connected to one end of the connecting shaft (16); the support rod (18) is fixedly connected to both sides of the limit plate (17); and the air intake baffle (19) is welded to the outside of the support rod (18) to block the air intake and exhaust ends of the air vent cover (6).

4. The detachable gas leak alarm according to claim 1, characterized in that: The clamping assembly (9) comprises a blind hole (20), a compression spring (21), a telescopic rod (22) and a clamping ball (23); the blind hole (20) is arranged on the inner side of the wall-mounted base (2); two sides of the compression spring (21) are respectively fixedly connected to the clamping ball (23) and the surface of the wall-mounted base (2); the telescopic rod (22) is installed on the inner side of the compression spring (21) to limit the moving path of the clamping ball (23); and the outer side of the clamping ball (23) abuts against the surface of the circular support (3).

5. A detachable gas leak alarm according to claim 4, characterized in that: A locking groove (24) matching the size of the locking ball (23) is also provided inside the circular support (3).

6. A detachable gas leak alarm according to claim 5, characterized in that: The opposite sides of the circular support (3) and the wall-mounted base (2) are also provided with a plug-in block (25) and a slot (26) with mutually matching sizes.

7. The detachable gas leak alarm according to claim 1, characterized in that: A thread groove (35) and a hollow screw (36) having sizes matching each other are also provided at the connection between the exhaust pipe (27) and the detection bottle (31).

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