Windproof and anti-interference combustible gas detector

Abstract

The present application provides a windproof and anti-interference combustible gas detector, comprising a detector housing, an upper cover, a sensor, an audible and visual alarm device and a circuit main board. A receiving cavity is provided on the top of the detector housing, a circuit main board is provided in the receiving cavity, a heat insulating pad is provided between the circuit main board and the inner bottom of the receiving cavity, an electronic display board is provided on the circuit main board, the upper cover is threadedly connected to the detector housing, an explosion-proof glass sheet placed above the electronic display board is provided in the upper cover, a sensor assembly for detecting combustible gas is connected to one side of the outer side of the detector housing, a rotatably adjustable air pipe joint is connected to the air inlet side of the sensor assembly, the outer side of the detector housing is also connected to an audible and visual alarm device via a connecting screw, and a wiring port is provided at the other end of the detector housing opposite to the audible and visual alarm device. The present application can conveniently and quickly adjust the orientation of the air pipe joint during use to reduce the influence of wind speed and wind direction and detect the leakage of combustible gas to the greatest extent.

Description

Technical Field

[0001] The present application relates to the technical field of combustible gas detection, and in particular to a windproof and anti-interference combustible gas detector. Background Art

[0002] A gas detector is a detector that detects gas concentration. Its core component is a gas sensitive sensor, which is installed in places where gas leaks may occur. When the concentration of gas in the air exceeds the set value, the detector will be triggered to alarm and send out sound and light alarm signals. If the alarm host and the alarm center are connected, the alarm can be connected to the Internet. At the same time, it can automatically start the exhaust equipment, close the gas pipeline valve, etc. to ensure the safety of life and property. In civil safety prevention projects, it is mostly used for household gas leak alarms, and is also widely used in various refineries, oil depots, chemical plants, liquefied gas stations and other places prone to combustible gas leaks.

[0003] When detecting combustible gas, the combustible gas detector must especially consider the influence of wind direction and wind speed. When the wind speed is high, the sensor will make a detection error and the detector will generate a false alarm. If the wind direction is not considered during detection, the possible leakage cannot be detected to the greatest extent, which reduces the accuracy of detection. However, the current combustible gas detector cannot be adjusted according to the wind direction because the detection end is fixed, nor can it better adapt to the environment for efficient detection when the wind speed is high. Summary of the invention

[0004] The present application provides a windproof and anti-interference combustible gas detector to solve the problem that the current combustible gas detector cannot be adjusted according to the wind direction due to the fixed detection end, and cannot better adapt to the environment for efficient detection when the wind speed is high.

[0005] The present application provides a windproof and anti-interference combustible gas detector, comprising a detector shell, an upper cover, a sensor assembly, an audible and visual alarm device and a circuit main board. A accommodating cavity is provided at the top of the detector shell, a circuit main board is arranged in the accommodating cavity, a heat insulating pad is arranged between the circuit main board and the inner bottom of the accommodating cavity, an electronic display board is arranged on the circuit main board, the upper cover is threadedly connected to the detector shell, an explosion-proof glass sheet placed above the electronic display board is arranged in the upper cover, a sensor assembly for detecting combustible gas is connected to one side of the outside of the detector shell, a rotatable and adjustable air pipe joint is connected to the air inlet side of the sensor assembly, the outside of the detector shell is also connected to the audible and visual alarm device via a connecting screw, and a wiring port is arranged at the other end of the detector shell opposite to the audible and visual alarm device.

[0006] In an optional embodiment, the sound and light alarm device includes an alarm light main shell, an alarm light bottom shell, a buzzer, and an alarm light cover. One end of the alarm light main shell is threadedly connected to the alarm light bottom shell and encapsulates the buzzer located inside the alarm light main shell. The other end of the alarm light main shell is connected to the alarm light cover and the alarm light located inside the alarm light cover is installed. The alarm light main shell is threadedly connected to the connecting screw.

[0007] In an optional embodiment, the sensor assembly includes an air chamber bottom shell, an air chamber bottom plate, an air chamber cover and a sensor, one end of the air chamber bottom shell is threadedly connected to the detector housing, the other end of the air chamber bottom shell is provided with an air chamber, the inner bottom wall of the air chamber is provided with an air chamber bottom plate, the sensor is arranged on the air chamber bottom plate and located inside the air chamber, the air chamber cover is threadedly connected to the outer side of the air chamber, and one end of the air chamber cover is threadedly connected to the air pipe joint; a processor and a controller are integrated on the circuit main board, the sensor is electrically connected to the processor, the processor is electrically connected to the controller, and the controller is electrically connected to the electronic display board and the sound and light alarm device respectively.

[0008] In an optional embodiment, the air pipe joint includes an air cylinder cover, a rotating shell, a connecting clamp and two limiting rubber rings, the outer side of the rear end of the rotating shell is movably connected with the air cylinder cover covering the rotating shell, the rotating shell is a conical cylindrical structure with a small front opening and a large rear end opening, the inner side of the rear end opening of the rotating shell is provided with an internal thread and is connected to the external thread on the air inlet side of the air chamber cover, the outer side of the rear end of the rotating shell is integrally connected with the connecting clamp, the connecting clamp is a circular ring with a circular cross-section, the air cylinder cover is a cylindrical structure with openings at both ends, two limiting rubber rings are coaxially arranged on the inner side of the rear end of the air cylinder cover, the connecting clamp is movably clamped between the two limiting rubber rings, and the front end opening of the air cylinder cover is installed with a breathable dust-proof and heat-insulating net.

[0009] In an optional embodiment, the thermal insulation pad and the air chamber bottom plate are both made of polytetrafluoroethylene material.

[0010] In an optional embodiment, a mounting base for connecting the sensor assembly is provided on one side of the exterior of the detector housing, a threaded hole is provided on the outer side of the mounting base, and a connecting end that can be threadedly connected to the mounting base is provided on the opposite end of the air chamber bottom shell where the air chamber is provided; the detector housing and the upper cover are both made of die-cast alloy aluminum shells.

[0011] In an optional embodiment, a connecting tube is provided on one side of the exterior of the detector housing and is arranged at a 90° interval with the mounting seat, and the connecting tube is threadedly connected to the connecting screw.

[0012] In an optional embodiment, a lug plate for hanging is provided at the outer bottom end of the detector housing, and a fixing hole for mounting the detector is provided on the lug plate.

[0013] In an optional embodiment, an observation hole is opened on the top surface of the upper cover, and the explosion-proof glass sheet is installed on the inner side of the observation hole through a glass clamp ring. A sealing ring is arranged between the explosion-proof glass sheet and the inner top end of the upper cover, and the explosion-proof glass sheet is located between the sealing ring and the glass clamp ring. A hollow display screen shell is arranged on the upper surface of the electronic display board at the periphery corresponding to the display area, and a top cover sticker is pasted on the display screen shell.

[0014] In an optional embodiment, the model of the sensor is NAP-57S.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] The windproof and anti-interference combustible gas detector provided by the present application includes a detector shell, an upper cover, a sensor, an audible and visual alarm device and a circuit main board. The present application installs the circuit main board in the detector shell and encapsulates it through an upper cover with an explosion-proof glass sheet, and an insulating pad is also provided between the circuit main board and the bottom of the accommodating cavity of the detector shell, which can effectively prevent the high temperature at the bottom of the detector shell from being conducted to the circuit main board above, and ensure that the area between the explosion-proof glass sheet and the insulating pad is effectively isolated from other areas, thereby ensuring stability during use and achieving a good explosion-proof effect; and the present application connects a sensor component for detecting combustible gas on the external side of the detector shell, so that the sensor can be used when in use. The air inlet end of the sensor assembly faces downward to ensure good contact with the gas while preventing rain from entering. In addition, the rotatable and adjustable air pipe joint connected to the air inlet side of the sensor assembly can facilitate and quickly adjust the position of the air pipe joint during use to reduce the influence of wind speed and wind direction and detect the leakage of combustible gas to the greatest extent. At the same time, the present application also connects an audible and visual alarm device to the outside of the detector housing through a connecting screw, which can sound and light alarm through the audible and visual alarm device when a combustible gas leakage is detected, and the detector housing is provided with a wiring port at the other end opposite to the audible and visual alarm device for connecting to an external power supply and grounding, thereby effectively preventing electromagnetic interference.

[0017] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0018] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the explosion structure of a windproof and anti-interference combustible gas detector provided in one embodiment of the present application;

[0021] Figure 2 A schematic front view of a windproof and anti-interference combustible gas detector provided in one embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a trachea connector provided in one embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a trachea joint from another angle provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a gas cylinder cover provided in one embodiment of the present application;

[0025] Figure 6 A schematic structural diagram of a rotating shell provided in one embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1-Detector housing;

[0028] 2-Upper cover;

[0029] 3-Explosion-proof glass;

[0030] 4- Sound and light alarm device;

[0031] 401-buzzer;

[0032] 402- alarm lamp cover;

[0033] 403- main housing of warning light;

[0034] 404-warning light base;

[0035] 5-Trachea connector;

[0036] 501-gas cylinder cover;

[0037] 502-rotating shell;

[0038] 503-connecting snap ring;

[0039] 504-limiting rubber ring;

[0040] 6-accommodating cavity;

[0041] 7-Insulation pad;

[0042] 8- Circuit main board;

[0043] 9-Sensor assembly;

[0044] 901-Air chamber bottom shell;

[0045] 902-Air chamber bottom plate;

[0046] 903-air chamber cover;

[0047] 904-Sensor;

[0048] 905-air chamber;

[0049] 10- Connecting screw;

[0050] 11- Mounting seat;

[0051] 12- Wiring port;

[0052] 13-connecting tube;

[0053] 14- ear plate;

[0054] 15-Observation hole;

[0055] 16-Glass clamp ring;

[0056] 17- sealing ring;

[0057] 18-display screen housing;

[0058] 19-Top cover sticker;

[0059] 20-fixing hole;

[0060] 21-Electronic display board. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0062] See also Figure 1-Figure 4A windproof and anti-interference combustible gas detector provided in an embodiment of the present application includes a detector housing 1, an upper cover 2, a sensor assembly 9, an audible and visual alarm device 4 and a circuit main board 8. A receiving chamber 6 is provided at the top of the detector housing 1, a circuit main board 8 is arranged in the receiving chamber 6, a heat insulation pad 7 is arranged between the circuit main board 8 and the inner bottom of the receiving chamber 6, an electronic display board 21 is arranged on the circuit main board 8 for displaying detection information, the upper cover 2 is threadedly connected to the detector housing 1, an explosion-proof glass sheet 3 is arranged in the upper cover 2 and is placed above the electronic display board 21, a sensor assembly 9 for detecting combustible gas is connected to one side of the outside of the detector housing 1, a rotatable and adjustable air pipe joint 5 is connected to the air inlet side of the sensor assembly 9, the outside of the detector housing 1 is also connected to the audible and visual alarm device 4 through a connecting screw 10, and a wiring port 12 is provided at the other end of the detector housing 1 opposite to the audible and visual alarm device 4 for connecting to an external power supply and grounding, which can be fixed with a hexagonal locking nut.

[0063] The windproof and anti-interference combustible gas detector provided in the embodiment of the present application includes a detector housing 1, an upper cover 2, a sensor assembly 9, an audible and visual alarm device and a circuit main board. The present application installs the circuit main board 8 in the detector housing 1 and encapsulates it through the upper cover 2 with an explosion-proof glass sheet, and an insulating pad 7 is also provided between the circuit main board 8 and the bottom of the accommodating cavity 6 of the detector housing 1, which can effectively prevent the high temperature at the bottom of the detector housing 1 from being conducted to the circuit main board above, and ensure that the area between the explosion-proof glass sheet and the insulating pad 7 is effectively isolated from other areas, thereby ensuring stability during use and achieving a good explosion-proof effect.

[0064] Moreover, the present application connects a sensor assembly 9 for detecting combustible gas to the external side of the detector housing 1. When in use, the air inlet end of the sensor assembly 9 faces downward to ensure good contact with the gas while preventing rainwater from entering. In addition, the rotatable and adjustable air pipe joint connected to the air inlet side of the sensor assembly 9 can facilitate and quickly adjust the position of the air pipe joint during use to reduce the influence of wind speed and wind direction and detect combustible gas leakage to the greatest extent.

[0065] At the same time, the present application also connects an audible and visual alarm device 4 to the outside of the detector housing 1 through a connecting screw 10, which can sound and light alarm through the audible and visual alarm device 4 when a combustible gas leak is detected. In addition, the detector housing 1 is provided with a wiring port 12 at the other end opposite to the audible and visual alarm device 4 for connecting to an external power supply and grounding, thereby effectively preventing electromagnetic interference.

[0066] In some embodiments of the present application, the sound and light alarm device 4 includes an alarm light main housing 403, an alarm light bottom housing 404, a buzzer 401, and an alarm light cover 402. One end of the alarm light main housing 403 is threadedly connected to the alarm light bottom housing 404 and encapsulates the buzzer 401 located inside the alarm light main housing 403, so as to facilitate the replacement of the buzzer 401 when the buzzer 401 fails. The other end of the alarm light main housing 403 is connected to the alarm light cover 402 and is installed with the alarm light located inside the alarm light cover 402. The alarm light cover 402 protects the internal alarm light, effectively prolonging the service life of the alarm light from being affected by the harsh environment. The alarm light main housing 403 is threadedly connected to the connecting screw 10, which is convenient for installation and removal. When the alarm light bottom housing 404 is installed on the alarm light main housing 403 and the alarm light cover 402 is installed on the alarm light main housing 403, a sealing gasket can be added to enhance the sealing during connection.

[0067] In some embodiments of the present application, the sensor assembly 9 includes an air chamber bottom shell 901, an air chamber bottom plate 902, an air chamber cover 903 and a sensor 904. One end of the air chamber bottom shell 901 is connected to the detector housing 1. Threaded connection, an air chamber 905 is provided at the other end of the air chamber bottom shell 901 for receiving the combustible gas to be detected, an air chamber bottom plate 902 is provided on the inner bottom wall of the air chamber 905, a sensor 904 is arranged on the air chamber bottom plate 902 and is located in the air chamber 905, an air chamber cover 903 is threadedly connected to the outside of the air chamber 905, and one end of the air chamber cover 903 is threadedly connected to the air pipe joint 5; a processor and a controller are integrated on the circuit main board 8, the sensor 904 is electrically connected to the processor, the processor can be used to receive and process the combustible gas parameter information detected by the sensor 904, the processor is electrically connected to the controller, and the controller executes the control instruction after receiving the information sent by the processor, wherein the controller is electrically connected to the electronic display board 21 and the sound and light alarm device 4 respectively, specifically, after receiving the information sent by the processor, the controller controls the electronic display board 21 to display the detection information of the combustible gas according to the detected combustible gas parameter information, and controls the sound and light alarm device 4 to emit a sound and light alarm when the combustible gas concentration exceeds the standard. In the present application, the use of sensors in conjunction with controllers and processors for combustible gas detection is a conventional and mature technology in the field. The present application does not involve any improvements thereto, and no further explanation will be given.

[0068] Sensors 904 that have exceeded their effective service life or are faulty must be replaced. When replacing sensor 904, professional engineering technicians must be present to complete the operation. After disconnecting the power supply, unscrew the air chamber cover 903, take out the old sensor, install the new sensor in place, and then tighten the air chamber cover 903. After the sensor is replaced, turn on the power supply and use it again. After replacing the new sensor, some settings of the detector may change. It is recommended to calibrate the detector after installing the new sensor.

[0069] In the present application, the sensor 904 is arranged on the air chamber bottom plate 902 and is located in the air chamber 905. After the air chamber bottom shell 901 and the air chamber cover 903 are connected, the sensor 904 can be installed in the air chamber 905 for protection. After the gas entering the air chamber 905 enters the air chamber 905 through the air pipe joint 5, the gas temperature can be reduced to ensure the service life of the sensor 904.

[0070] Since sensor 904 is a high-precision component and is easily damaged when directly exposed to the outside, the air chamber bottom shell 901 and the air chamber cover 903 provide effective protection for sensor 904, so that sensor 904 will not be exposed to rainwater. In addition, the limited space of air chamber 905 also limits the vibration of sensor 904, ensuring the normal and stable use of sensor 904.

[0071] In some embodiments of the present application, the trachea connector 5 includes a cylinder cover 501, a rotating shell 502, a connecting clamp 503 and two limiting rubber rings 504. The outer side of the rear end of the rotating shell 502 is movably connected with the cylinder cover 501 covering the rotating shell 502. The rotating shell 502 is a conical cylindrical structure with a small front opening and a large rear opening. The inner side of the rear end opening of the rotating shell 502 is provided with an internal thread and is connected to the external thread on the air inlet side of the air chamber cover 903. The outer side of the rear end of the rotating shell 502 is integrally connected with a connecting clamp 503. The connecting clamp 503 is a circular ring with a circular cross-section. The cylinder cover 501 is a cylindrical structure with openings at both ends. Two limiting rubber rings 504 are coaxially arranged on the inner side of the rear end of the cylinder cover 501. The connecting clamp 503 is movably clamped between the two limiting rubber rings 504. The front end opening of the cylinder cover 501 is installed with a breathable dust-proof and heat-insulating net.

[0072] In the embodiment of the present application, the rotating shell 502 is located inside the cylinder cover 501, and the cylinder cover 501 is threadedly connected to the air chamber cover 903 through the rotating shell 502. In application, the rotating shell 502 remains fixed, and the rotating shell 502 can rotate relative to the rotating shell 502 and can be tilted and rotated to a certain extent. The connecting snap ring 503 is a circular ring with a circular cross-section. Therefore, when the connecting snap ring 503 is between two limiting rubber rings 504, the two limiting rubber rings 504 can limit the position of the connecting snap ring 503. When the cylinder cover 501 is manually rotated, after the force is transmitted to the cylinder cover 501, as the cylinder cover 501 tilts and twists, the limiting rubber ring 504 can squeeze the connecting snap ring 503 as the position of the cylinder cover 501 changes, thereby changing the angular position of the cylinder cover 501.

[0073] In actual use, when the wind speed is greater than 6m / s, the traditional combustible gas detector will produce a false alarm. At this time, the windproof and anti-interference combustible gas detector provided by the present application can make the sensor assembly 9 vertically downward to ensure that the air intake end of the trachea connector 5 is kept clean and the trachea connector 5 is not blocked. Then the trachea connector 5 is manually adjusted to make the cylinder cover 501 deflect relative to the rotating shell 502, so that the air intake side of the cylinder cover 501 is no longer vertically downward. Specifically, according to the direction and wind speed conditions, the air intake side of the cylinder cover 501 can be adjusted to form a certain angle with the wind direction, thereby reducing the influence of wind speed and wind direction, and detecting possible leaks to the greatest extent. Moreover, the front opening of the cylinder cover 501 is equipped with a breathable dustproof and heat-insulating net, which can play a certain role in dustproof and heat-insulating, and can also play a role in reducing the influence of wind speed, so that the wind speed of the gas entering the cylinder cover 501 is reduced, thereby improving the accuracy of detection. In order to facilitate the operability and maintenance of the detector, the installation position of the detector of this application needs to be considered during installation. If the detector needs to be installed at a lower position, the minimum height from the ground is 30 cm. In addition, when installing the detector, try to avoid installing it in a severe water vapor environment or a place directly exposed to rain spray.

[0074] In some embodiments of the present application, the thermal insulation pad 7 and the air chamber bottom plate 902 are both made of polytetrafluoroethylene material, which can provide good thermal insulation.

[0075] In some embodiments of the present application, a mounting base 11 for connecting the sensor assembly 9 is provided on an external side of the detector housing 1, a threaded hole is provided on the outer side of the mounting base 11, and the air chamber bottom shell 901 is provided with a connecting end that can be threadedly connected to the mounting base 11 at the opposite end where the air chamber 905 is provided; the detector housing 1 and the upper cover 2 are both made of die-cast alloy aluminum shells, which have good strength and are light in weight, and can reduce the weight of the entire detector.

[0076] In some embodiments of the present application, a connecting tube 13 arranged at a 90° interval with the mounting seat 11 is provided on the outer side of the detector housing 1. The connecting tube 13 is threadedly connected to the connecting screw 10 and can be fixed with a hexagonal locking nut to ensure the stability of the connection.

[0077] In some embodiments of the present application, a lug plate 14 for hanging is provided at the outer bottom end of the detector housing 1, and a fixing hole 20 for installing the detector is provided on the lug plate 14 to facilitate the installation of the detector. Specifically, three lug plates 14 can be evenly provided at the outer bottom end of the detector housing 1, so that the detector of the present application is more stable when being fixed.

[0078] When in use, the entire detector can be installed on a wall or on the surface of an object using the ear plate 14, with one end of the sensor assembly 9 facing vertically downward, and then the entire detector can be fixed and installed using the fixing holes 20 in conjunction with fixing screws or expansion bolts, making it easy to install and disassemble. Of course, the detector of the present application can also be installed in conjunction with a mounting bracket. During installation, the detector of the present application can be first connected to the mounting bracket, and then the mounting bracket with the detector installed can be fixed to the wall mounting position using expansion bolts.

[0079] In some embodiments of the present application, an observation hole 15 is opened on the top surface of the upper cover 2, and an explosion-proof glass sheet 3 is installed on the inner side of the observation hole 15 of the upper cover 2 through a glass clamp ring 16, so as to facilitate the observation of the detection information on the electronic display board 21. A sealing ring 17 is arranged between the explosion-proof glass sheet 3 and the inner top of the upper cover 2 to prevent rainwater from entering the interior of the detector housing 1. The explosion-proof glass sheet 3 is located between the sealing ring 17 and the glass clamp ring 16. A hollow display screen shell 18 is arranged on the upper surface of the electronic display board 21 at the periphery corresponding to the display area, and an upper cover sticker 19 is pasted on the display screen shell 18.

[0080] In some embodiments of the present application, the model of sensor 904 is NAP-57S.

[0081] The service life of the detector will vary depending on the environmental conditions in which it is located. Conventionally, the service life of an oxygen sensor is one year, the service life of an electrochemical principle sensor is two years, the service life of a catalytic combustion sensor is three years, and the service life of an infrared principle sensor is five years. The sensor 904 of model NAP-57S used in the embodiment of the present application is a contact combustion gas sensor, which can be used in combustible gas detectors in industrial and commercial situations. It has good stability, excellent repeatability and consistency, and has good linearity corresponding to different gas concentrations. It can be very flexibly used in combustible gas alarms and combustible gas concentration detectors, and the sensor can detect all combustible gases except acetylene, with a detection range of 1% to 100% LEL, of which a detection accuracy of ±10% can be achieved within 50% LEL.

[0082] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0083] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A windproof and anti-interference combustible gas detector, characterized in that: It includes a detector housing, an upper cover, a sensor assembly, an audible and visual alarm device and a circuit main board, a receiving cavity is provided on the top of the detector housing, a circuit main board is provided in the receiving cavity, a heat insulating pad is provided between the circuit main board and the inner bottom of the receiving cavity, an electronic display board is provided on the circuit main board, the upper cover is threadedly connected to the detector housing, an explosion-proof glass sheet placed above the electronic display board is provided in the upper cover, a sensor assembly for detecting combustible gas is connected to one side of the exterior of the detector housing, a rotatably adjustable air pipe joint is connected to the air inlet side of the sensor assembly, the exterior of the detector housing is also connected to the audible and visual alarm device via a connecting screw, and a wiring port is provided at the other end of the detector housing opposite to the audible and visual alarm device; The sound and light alarm device comprises an alarm light main housing, an alarm light bottom housing, a buzzer, and an alarm light cover. One end of the alarm light main housing is threadedly connected to the alarm light bottom housing and encapsulates the buzzer located inside the alarm light main housing. The other end of the alarm light main housing is connected to the alarm light cover and is equipped with an alarm light located inside the alarm light cover. The alarm light main housing is threadedly connected to the connecting screw. The sensor assembly includes an air chamber bottom shell, an air chamber bottom plate, an air chamber cover and a sensor, one end of the air chamber bottom shell is threadedly connected to the detector housing, the other end of the air chamber bottom shell is provided with an air chamber, the inner bottom wall of the air chamber is provided with an air chamber bottom plate, the sensor is arranged on the air chamber bottom plate and located in the air chamber, the air chamber cover is threadedly connected to the outer side of the air chamber, and one end of the air chamber cover is threadedly connected to the air pipe joint; a processor and a controller are integrated on the circuit main board, the sensor is electrically connected to the processor, the processor is electrically connected to the controller, and the controller is electrically connected to the electronic display board and the sound and light alarm device respectively; The air pipe joint includes an air cylinder cover, a rotating shell, a connecting clamp and two limiting rubber rings. The air cylinder cover covering the rotating shell is movably connected to the outer side of the rear end of the rotating shell. The rotating shell is a conical cylindrical structure with a small front opening and a large rear end opening. The inner side of the rear end opening of the rotating shell is provided with an internal thread and is connected to the external thread on the air inlet side of the air chamber cover. The outer side of the rear end of the rotating shell is integrally connected with the connecting clamp, which is a circular ring with a circular cross-section. The air cylinder cover is a cylindrical structure with openings at both ends. Two limiting rubber rings are coaxially arranged on the inner side of the rear end of the air cylinder cover. The connecting clamp is movably clamped between the two limiting rubber rings. The front end opening of the air cylinder cover is installed with a breathable dust-proof and heat-insulating net.

2. The windproof and anti-interference combustible gas detector according to claim 1 is characterized in that: The heat insulation pad and the air chamber bottom plate are both made of polytetrafluoroethylene material.

3. The windproof and anti-interference combustible gas detector according to claim 1 is characterized in that: A mounting seat for connecting the sensor assembly is arranged on one side of the exterior of the detector housing, a threaded hole is provided on the outer side of the mounting seat, and a connecting end which can be threadedly connected to the mounting seat is provided on the opposite end of the air chamber bottom shell where the air chamber is arranged; the detector housing and the upper cover are both made of die-cast alloy aluminum housing.

4. The windproof and anti-interference combustible gas detector according to claim 3 is characterized in that: A connecting tube is arranged at a 90° interval with the mounting seat on one side of the exterior of the detector housing, and the connecting tube is threadedly connected to the connecting screw.

5. The windproof and anti-interference combustible gas detector according to claim 3 is characterized in that: The outer bottom end of the detector housing is provided with an ear plate for hanging, and the ear plate is provided with a fixing hole for installing the detector.

6. The windproof and anti-interference combustible gas detector according to claim 3 is characterized in that: An observation hole is provided on the top surface of the upper cover, and the explosion-proof glass sheet is installed on the inner side of the observation hole through a glass clamp ring. A sealing ring is provided between the explosion-proof glass sheet and the inner top end of the upper cover, and the explosion-proof glass sheet is located between the sealing ring and the glass clamp ring. A hollow display screen shell is provided on the upper surface of the electronic display board at the periphery corresponding to the display area, and a top cover sticker is pasted on the display screen shell.

7. The windproof and anti-interference combustible gas detector according to any one of claims 3 to 6, characterized in that: The model of the sensor is NAP-57S.

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