Catalytic Combustion Gas Leak Detector

Abstract

This invention provides a catalytic combustion gas leak detector, comprising a housing, an air intake detection mechanism at the bottom of the housing, and a processing mechanism inside the housing. The air intake detection mechanism includes an air intake pipe installed at the bottom of the housing and a gas sensor installed inside the air intake pipe near one end of the housing. Multiple exhaust components are located at the top of the air intake pipe, and the air intake ends of these exhaust components are connected to the interior of the housing. The processing mechanism includes a partition ring installed inside the housing and a processing circuit board located inside the partition ring and installed inside the housing. Multiple gas delivery components are located between the outer surface of the partition ring and the inner wall of the housing, and these gas delivery components are arranged around the axis of the housing. During detection, this invention can guide pre-stored air into contact with the gas sensor to prevent excessively high concentrations of combustible gas from affecting detection accuracy.

Description

Technical Field

[0001] The invention mainly relates to the technical field of gas sensors, and in particular to a catalytic combustion type gas leak detector. Background Art

[0002] The catalytic combustion sensor is a high-temperature gas sensor that uses the thermal effect principle produced by catalytic combustion to output an electrical signal that is proportional to the concentration of the combustible gas.

[0003] According to the patent document with application number CN201721385250.7, the point-type combustible gas detection device based on the catalytic combustion gas sensor provided by the patent document can be known that the combustible gas detection device includes a main body part and a sensor part plugged into the main body part, the sensor part includes a catalytic combustion gas sensor gas sensitive element and a sensor control module, the two are connected to each other, and the sensor part realizes its connection with the catalytic combustion gas sensor gas sensitive element through the sensor control module, the device is an explosion-proof and intrinsically safe explosion-proof structure, the sensor part can be hot-swapped on the main body part, the sensor part includes a micro control unit, a storage unit and a compensation unit, can realize one person calibration, no need to rely on multiple people for calibration, very simple and convenient, and set a multi-level alarm mechanism, through a plurality of alarm relays to realize alarm processing under different levels of alarm, the application range is very wide.

[0004] The above-mentioned combustible gas detection device can be calibrated by one person without relying on multiple people for calibration, which is very simple and convenient. However, when a large amount of combustible gas enters the traditional combustible gas detection device, if there is no oxygen, the detection accuracy of the combustible gas detection device will be greatly reduced. Summary of the invention

[0005] The present invention mainly provides a catalytic combustion type gas leak detector to solve the technical problems raised in the above background technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A catalytic combustion type gas leak detector comprises a housing, a gas inlet detection mechanism is arranged at the bottom end of the housing, and a processing mechanism is arranged inside the housing;

[0008] The air intake detection mechanism includes an air intake pipe installed at the bottom end of the shell, and a gas sensor installed inside the air intake pipe near one end of the shell, a plurality of exhaust components are provided at the top end of the air intake pipe, the air intake ends of the plurality of exhaust components are connected to the inside of the shell, and the plurality of exhaust components are arranged around the gas sensor;

[0009] The processing mechanism includes a separation ring installed inside the shell, and a processing circuit board arranged inside the separation ring and installed inside the shell, a plurality of gas delivery components are arranged between the outer ring surface of the separation ring and the inner wall of the shell, and the plurality of gas delivery components are arranged around the axis of the shell;

[0010] The gas delivery assembly comprises an air intake component arranged on the inner wall of the shell, and an air delivery component arranged on the outer ring surface of the separation ring, and the air intake component and the air delivery component are connected via a pressing component.

[0011] Furthermore, the air intake component includes a first arc-shaped diaphragm installed on the inner wall surface of the outer shell, a plurality of first piezoelectric ceramics arranged on the lower surface of the first arc-shaped diaphragm, and a plurality of air intake holes arranged on the shell of the first arc-shaped diaphragm. In the present invention, the first arc-shaped diaphragm vibrates through the first piezoelectric ceramic so that the first arc-shaped diaphragm is periodically folded and flattened.

[0012] Furthermore, a first convex ring is provided inside the air inlet, and a first air shielding sheet is installed on the lower surface of the first convex ring.

[0013] Furthermore, a first gap is provided between a side surface of the first arc-shaped diaphragm and an inner wall of the housing.

[0014] Furthermore, the air supply component includes a second arc-shaped diaphragm installed on the outer surface of the separating ring, a plurality of second piezoelectric ceramics arranged on the upper surface of the second arc-shaped diaphragm, and a plurality of air supply holes arranged on the second arc-shaped diaphragm, and the plurality of air supply holes and the air inlet holes are staggered. In the present invention, the second arc-shaped diaphragm vibrates through the second piezoelectric ceramics so that the second arc-shaped diaphragm is periodically folded and flattened.

[0015] Furthermore, the air supply component also includes a second convex ring installed inside the air supply hole, and a second air shielding sheet provided on the lower surface of the second convex ring.

[0016] Furthermore, a second gap is provided between the second arc-shaped diaphragm and the outer ring surface of the separation ring.

[0017] Furthermore, the clamping component includes a plurality of first spring seats installed at both ends of the second arc-shaped diaphragm's surface away from the separating ring, and a plurality of second spring seats installed at both ends of the first arc-shaped diaphragm's surface close to the second arc-shaped diaphragm, and a compression spring connecting adjacent first spring seats and second spring seats. In the present invention, the compression spring is used to press the two ends of the second arc-shaped diaphragm onto the separating ring, and the two ends of the first arc-shaped diaphragm onto the outer shell, so as to facilitate the folding and unfolding of the first arc-shaped diaphragm and the second arc-shaped diaphragm.

[0018] Furthermore, the exhaust assembly includes an inclined air cylinder disposed inside the air inlet pipe and installed on the outer surface of the outer shell, and the lower surface of the inclined air cylinder is rotatably connected to an air blocking disk. In the present invention, the air inside the outer shell is compressed, passes through the inclined air cylinder, and pushes the air blocking disk to enter the interior of the air inlet pipe and contact the gas sensor.

[0019] Furthermore, the processing circuit board includes a separate power supply layer, a signal transmission layer and an anti-interference layer which are connected in sequence.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When performing detection, the present invention can guide the pre-stored air to contact the gas sensor to prevent the combustible gas concentration from being too high and affecting the detection accuracy. Specifically, the first arc-shaped diaphragm is vibrated through the first piezoelectric ceramic to allow outside air to enter the space between the first arc-shaped diaphragm and the second arc-shaped diaphragm. Similarly, the second arc-shaped diaphragm is folded due to the vibration to allow the air in the space between the first arc-shaped diaphragm and the second arc-shaped diaphragm to enter the outer shell. After being compressed, the air inside the outer shell passes through the inclined air cylinder and pushes open the air blocking plate to enter the inside of the air intake pipe and contact the gas sensor.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 A top view of the present invention;

[0025] Figure 3 for Figure 2 Sectional view along line AA;

[0026] Figure 4 This is a schematic diagram of the structure of the processing circuit board and gas delivery components of the present invention;

[0027] Figure 5 for Figure 4 A magnified view of the structure of area A;

[0028] Figure 6 for Figure 4 A magnified view of the structure of region B in FIG.

[0029] Figure 7 for Figure 3 A magnified view of the structure of the middle A area;

[0030] Figure 8 The figure is a schematic diagram of the structure of the circuit board processed by the present invention.

[0031] In the figure: 10, housing; 20, air intake detection mechanism; 21, air intake pipe; 22, gas sensor; 23, exhaust assembly; 231, inclined air delivery cylinder; 232, air blocking plate; 30, processing mechanism; 31, separation ring; 32, processing circuit board; 321, separation power layer; 322, signal transmission layer; 323, anti-interference layer; 33, air delivery assembly; 331, air intake component; 3311, first arc diaphragm; 3312, first piezoelectric ceramic ; 3313, air inlet hole; 3314, first convex ring; 3315, first air shielding plate; 3316, first gap; 332, air supply component; 3321, second arc-shaped diaphragm; 3322, second piezoelectric ceramic; 3323, air supply hole; 3324, second convex ring; 3325, second air shielding plate; 3326, second gap; 333, clamping component; 3331, first spring seat; 3332, second spring seat; 3333, clamping spring. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] For examples, please refer to the attached Figure 1-8 , a catalytic combustion gas leak detector comprises a housing 10, a gas inlet detection mechanism 20 is provided at the bottom end of the housing 10, and a processing mechanism 30 is provided inside the housing 10;

[0036] The air intake detection mechanism 20 includes an air intake pipe 21 installed at the bottom end of the housing 10, and a gas sensor 22 installed inside the air intake pipe 21 near one end of the housing 10, and a plurality of exhaust components 23 are provided at the top end of the air intake pipe 21, and the air intake ends of the plurality of exhaust components 23 are connected to the interior of the housing 10, and the plurality of exhaust components 23 are arranged around the gas sensor 22;

[0037] The processing mechanism 30 includes a separation ring 31 installed inside the housing 10, and a processing circuit board 32 arranged inside the separation ring 31 and installed inside the housing 10. A plurality of gas delivery components 33 are arranged between the outer ring surface of the separation ring 31 and the inner wall of the housing 10. The plurality of gas delivery components 33 are arranged around the axis of the housing 10.

[0038] The gas delivery assembly 33 includes an air intake component 331 disposed on the inner wall of the housing 10 and an air delivery component 332 disposed on the outer ring surface of the separation ring 31 . The air intake component 331 and the air delivery component 332 are connected via a pressing component 333 .

[0039] For details, please refer to the attached Figure 3 and 6 The air inlet component 331 includes a first arc-shaped diaphragm 3311 installed on the inner wall surface of the housing 10, a plurality of first piezoelectric ceramics 3312 provided on the lower surface of the first arc-shaped diaphragm 3311, and a plurality of air inlet holes 3313 provided on the shell of the first arc-shaped diaphragm 3311;

[0040] A first convex ring 3314 is provided inside the air inlet 3313, and a first air shielding sheet 3315 is installed on the lower surface of the first convex ring 3314;

[0041] A first gap 3316 is provided between a side surface of the first arc-shaped diaphragm 3311 and the inner wall of the housing 10;

[0042] It should be noted that, in this embodiment, the first arc-shaped diaphragm 3311 is vibrated by the first piezoelectric ceramic 3312, so that the first arc-shaped diaphragm 3311 is periodically folded and flattened;

[0043] Furthermore, when the first arc-shaped diaphragm 3311 is folded due to shaking, the first arc-shaped diaphragm 3311 compresses the air in the first gap 3316. At this time, since the air pressure in the first gap 3316 is greater than the air pressure in the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321, the air passes through the air inlet hole 3313 and pushes the first air shielding sheet 3315 to enter the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321.

[0044] When the first arc-shaped diaphragm 3311 is flattened due to shaking, the first arc-shaped diaphragm 3311 compresses the air in the space between the first arc-shaped diaphragm 3321 , so that the first air shielding sheet 3315 returns to its original working position with the help of the air pressure.

[0045] For details, please refer to the attached Figure 4 and 5 The air supply component 332 includes a second arc-shaped diaphragm 3321 installed on the outer surface of the separation ring 31, a plurality of second piezoelectric ceramics 3322 arranged on the upper surface of the second arc-shaped diaphragm 3321, and a plurality of air supply holes 3323 arranged on the second arc-shaped diaphragm 3321, and the plurality of air supply holes 3323 and the air inlet holes 3313 are arranged alternately;

[0046] The air supply component 332 further includes a second convex ring 3324 installed inside the air supply hole 3323, and a second air shielding sheet 3325 provided on the lower surface of the second convex ring 3324;

[0047] A second gap 3326 is provided between the second arc-shaped diaphragm 3321 and the outer ring surface of the separation ring 31;

[0048] It should be noted that, in this embodiment, the second arc-shaped diaphragm 3321 is vibrated by the second piezoelectric ceramic 3322, so that the second arc-shaped diaphragm 3321 is periodically folded and flattened;

[0049] Furthermore, when the second arc-shaped diaphragm 3321 is folded due to shaking, the second arc-shaped diaphragm 3321 compresses the air in the second gap 3326. At this time, since the air pressure in the second gap 3326 is lower than the air pressure in the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321, the air passes through the air supply hole 3323 and pushes the second air shielding sheet 3325 to enter the interior of the housing 10.

[0050] When the second arc-shaped diaphragm 3321 is flattened due to shaking, the second arc-shaped diaphragm 3321 compresses the air in the housing 10, so that the first air shielding sheet 3315 returns to its original working position with the help of the air pressure.

[0051] For details, please refer to the attached Figure 4 and 6 The pressing component 333 includes a plurality of first spring seats 3331 installed at both ends of the surface of the second arc-shaped diaphragm 3321 away from the separation ring 31, and a plurality of second spring seats 3332 installed at both ends of the surface of the first arc-shaped diaphragm 3311 close to the second arc-shaped diaphragm 3321, and a pressing spring 3333 connecting adjacent first spring seats 3331 and second spring seats 3332;

[0052] The exhaust assembly 23 includes an inclined gas delivery cylinder 231 disposed inside the air inlet pipe 21 and mounted on the outer surface of the housing 10, and a gas blocking disk 232 is rotatably connected to the lower surface of the inclined gas delivery cylinder 231;

[0053] The processing circuit board 32 includes a separation power supply layer 321, a signal transmission layer 322 and an anti-interference layer 323 connected in sequence;

[0054] It should be noted that, in this embodiment, the first spring seat 3331 and the second spring seat 3332 provide support for the compression spring 3333, and the compression spring 3333 allows the two ends of the second arc-shaped diaphragm 3321 to be pressed against the separation ring 31, and the two ends of the first arc-shaped diaphragm 3311 to be pressed against the housing 10, so as to facilitate the folding and unfolding of the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321;

[0055] Furthermore, after being compressed, the air inside the housing 10 passes through the inclined air delivery cylinder 231 and pushes the air blocking disk 232 to enter the air inlet pipe 21 and contact the gas sensor 22. Magnets are provided on the upper surface of the air blocking disk 232 and the lower surface of the inclined air delivery cylinder 231, so that the air blocking disk 232 can quickly return to its original working position after being pushed away by the air flow.

[0056] Furthermore, the processing circuit board 32 has a multi-layer structure formed by separating the power supply layer 321, the signal transmission layer 322 and the anti-interference layer 323, so that it works stably and is not interfered by external signals.

[0057] The specific operation mode of the present invention is as follows:

[0058] When the gas leak detector performs routine heat dissipation, the first arc-shaped diaphragm 3311 vibrates through the first piezoelectric ceramic 3312, so that the first arc-shaped diaphragm 3311 is periodically folded and flattened. When the first arc-shaped diaphragm 3311 is folded due to the vibration, the first arc-shaped diaphragm 3311 compresses the air in the first gap 3316. At this time, since the air pressure in the first gap 3316 is greater than the air pressure in the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321, The air passes through the air inlet hole 3313 and pushes open the first air shielding sheet 3315 to enter the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321. As the air pressure in the space gradually increases, the air passing through the space pushes open the air delivery hole 3323 on the second arc-shaped diaphragm 3321, so that the air pressure inside the housing 10 gradually increases. The hot air passes through the inclined air delivery cylinder 231 and pushes open the air blocking plate 232 to enter the air inlet pipe 21 and be discharged.

[0059] When the gas leak detector is performing detection, the first arc-shaped diaphragm 3311 vibrates through the first piezoelectric ceramic 3312 to allow outside air to enter the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321. Similarly, the second arc-shaped diaphragm 3321 is folded due to the vibration to allow the air in the space between the first arc-shaped diaphragm 3311 and the second arc-shaped diaphragm 3321 to enter the outer shell 10. After being compressed, the air inside the outer shell 10 passes through the inclined air cylinder 231 and pushes open the air blocking plate 232 to enter the interior of the air inlet pipe 21 and contact the gas sensor 22.

[0060] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A catalytic combustion gas leak detector, comprising a housing (10), characterized in that: An air intake detection mechanism (20) is provided at the bottom end of the housing (10), and a processing mechanism (30) is provided inside the housing (10); The air intake detection mechanism (20) comprises an air intake pipe (21) installed at the bottom end of the housing (10), and a gas sensor (22) installed inside the air intake pipe (21) close to one end of the housing (10), a plurality of exhaust components (23) are provided at the top end inside the air intake pipe (21), the air intake ends of the plurality of exhaust components (23) are connected to the interior of the housing (10), and the plurality of exhaust components (23) are arranged around the gas sensor (22); The processing mechanism (30) comprises a separation ring (31) installed inside the housing (10), and a processing circuit board (32) arranged inside the separation ring (31) and installed inside the housing (10); a plurality of gas delivery components (33) are arranged between the outer ring surface of the separation ring (31) and the inner wall of the housing (10); and the plurality of gas delivery components (33) are arranged around the axis of the housing (10); The gas delivery assembly (33) comprises an air intake component (331) arranged on the inner wall of the housing (10), and an air delivery component (332) arranged on the outer ring surface of the separation ring (31), and the air intake component (331) and the air delivery component (332) are connected via a pressing component (333); The air intake component (331) comprises a first arc-shaped diaphragm (3311) mounted on the inner wall surface of the housing (10), a plurality of first piezoelectric ceramics (3312) arranged on the lower surface of the first arc-shaped diaphragm (3311), and a plurality of air intake holes (3313) arranged on the shell of the first arc-shaped diaphragm (3311); A first convex ring (3314) is provided inside the air inlet (3313), and a first air shielding sheet (3315) is installed on the lower surface of the first convex ring (3314); A first gap (3316) is provided between a side surface of the first arc-shaped diaphragm (3311) and the inner wall of the housing (10).

2. The catalytic combustion gas leak detector according to claim 1, characterized in that: The air supply component (332) includes a second arc-shaped diaphragm (3321) installed on the outer surface of the separation ring (31), a plurality of second piezoelectric ceramics (3322) arranged on the upper surface of the second arc-shaped diaphragm (3321), and a plurality of air supply holes (3323) arranged on the second arc-shaped diaphragm (3321), and the plurality of air supply holes (3323) and the air inlet holes (3313) are arranged alternately.

3. The catalytic combustion gas leak detector according to claim 2, characterized in that: The air supply component (332) further includes a second convex ring (3324) installed inside the air supply hole (3323), and a second air shielding sheet (3325) provided on the lower surface of the second convex ring (3324).

4. The catalytic combustion gas leak detector according to claim 2, characterized in that: A second gap (3326) is provided between the second arc-shaped diaphragm (3321) and the outer ring surface of the separation ring (31).

5. The catalytic combustion gas leak detector according to claim 4, characterized in that: The clamping component (333) includes a plurality of first spring seats (3331) installed at both ends of the surface of the second arc-shaped diaphragm (3321) away from the separating ring (31), a plurality of second spring seats (3332) installed at both ends of the surface of the first arc-shaped diaphragm (3311) close to the second arc-shaped diaphragm (3321), and a clamping spring (3333) connecting adjacent first spring seats (3331) and second spring seats (3332).

6. The catalytic combustion gas leak detector according to claim 1, characterized in that: The exhaust assembly (23) comprises an inclined gas delivery cylinder (231) disposed inside the air inlet pipe (21) and mounted on the outer surface of the housing (10); the lower surface of the inclined gas delivery cylinder (231) is rotatably connected to a gas blocking disk (232).

7. The catalytic combustion gas leak detector according to claim 1, characterized in that: The processing circuit board (32) comprises a separation power supply layer (321), a signal transmission layer (322) and an anti-interference layer (323) which are connected in sequence.

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