A gas meter leak alarm device and method

Abstract

The application discloses a gas meter leakage alarm device and method, relates to the technical field of gas meter leakage alarm, and comprises a base mechanism, the inside of the base mechanism is internally provided with a substrate mechanism for preventing poisoning of the leakage alarm and performance decline caused by poisoning, and the bottom of the substrate mechanism is provided with a rotating blade mechanism for extracting surrounding air for gas detection. The base mechanism is installed on the top of the area where gas may leak, surrounding air is actively extracted, stable airflow is formed to enter the inside of the equipment, the airflow is guided into the area of the net flocculation assembly through the inner rotating blade assembly, the assembly not only realizes effective filtration of large-particle impurities and protection of internal elements, but also realizes dynamic change of the air inlet direction and periodic scanning of the airflow path through linkage design of the inner rotating blade assembly and the rotating assembly, a multi-point, wide-area coverage sampling mode is formed to expand the detection range, and the risk of missed detection caused by local airflow dead angle is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas meter leakage alarm, in particular to a gas meter leakage alarm device and method. BACKGROUND

[0002] For example, the patent with the patent name of an intelligent emergency call alarm switch device and the publication number of CN118097900B, the invention includes a mounting shell and a gas leakage instrument, etc., through the gas leakage instrument, the intelligent alarm switch and the emergency call loudspeaker, an alarm signal is sent to the outside world, at the same time, the first air extractor extracts the indoor gas to the outside, the second air extractor cooperates with the third air extractor to supplement the fresh air in the room, at the same time, the colored marking powder is sprayed along the direction of gas leakage and diffused in the room, effectively marking the diffusion and high concentration accumulation range of the leaked gas in the room, at the same time, part of the colored marking powder is extracted to the outside with the indoor gas by the first air extractor, warning the outside personnel that the gas leakage occurs in the area, effectively avoiding the phenomenon that the personnel who mistakenly enter the high concentration accumulation area of the leaked gas are prone to serious poisoning due to the low exhaust efficiency of the exhaust mechanism added on the emergency alarm switch device.

[0003] The above-mentioned gas alarm adopts passive diffusion sampling, relies on the natural diffusion of gas, and has slow response, is prone to missed alarm and delayed alarm when the ventilation is poor or the leakage point is far away, the detection range of the fixed sensor is limited, there are dead angles, it is difficult to cover complex spaces, oil fume, water vapor, organic silicon, sulfide and other pollutants in the kitchen and industrial environment are easy to cause the sensor to be "poisoned", causing sensitivity to decrease, zero point to drift, false alarm, and shortening the service life, at the same time, humidity change and volatile organic compounds (VOCs) interference are also easy to cause false alarm, therefore, the present application provides a gas meter leakage alarm device and method to meet the needs. SUMMARY

[0004] The purpose of the present application is to provide a gas meter leakage alarm device and method, which can effectively solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a gas meter leakage alarm device, comprising a base mechanism, the inside of the base mechanism is provided with a substrate mechanism for preventing the performance of the leakage alarm from being reduced due to poisoning, the bottom of the substrate mechanism is provided with a rotating blade mechanism for extracting surrounding air for gas detection, and the bottom of the base mechanism is provided with a net and flocculation assembly for filtering large particle impurities in the air.

[0006] The rotating blade mechanism comprises a rotating assembly for extracting surrounding air and an inner rotating blade assembly for guiding the direction of airflow and changing the flow path of air in the net and flocculation assembly, thereby improving the contact efficiency of gas with the leakage alarm.

[0007] The base mechanism comprises a mounting plate, the lower end of the mounting plate is provided with a mounting pipe, the outer surface of the mounting pipe is provided with a plurality of air outlet holes, the bottom side of the mounting plate is provided with a driving motor, and the output end of the driving motor is provided with a gear.

[0008] The base plate mechanism comprises a mounting frame, the inner wall of the mounting frame is provided with a circuit base plate, the lower end of the mounting frame is provided with a slip ring, and the lower end of the circuit base plate is provided with a conductive coil.

[0009] The lower end of the circuit base plate is provided with an electrical support, one end of the electrical support is connected with a second sensor, and the outer surface of the second sensor is provided with a polymer filter shell.

[0010] The net assembly comprises a mounting ring, the outer surface of the mounting ring is provided with a ventilation hole, the inner wall of the mounting ring is provided with a first net cover, and the mounting ring is mounted at the lower end of the mounting pipe.

[0011] The lower end of the mounting ring is provided with a bottom ring, the outer surface of the bottom ring is provided with a plurality of leakage holes arranged in a ring array, the inner wall of the leakage hole is provided with a second net cover, the inner wall of the bottom ring is provided with a sealing pipe, and the inner wall of the sealing pipe is provided with a third net cover.

[0012] The rotating assembly comprises a slip ring sleeve, the slip ring sleeve is slidably mounted on the outer surface of the slip ring, the outer surface of the slip ring sleeve is provided with a gear ring, the gear ring is engaged with the gear teeth, and the lower end of the slip ring sleeve is provided with a plurality of inclined leaves arranged in a ring array.

[0013] The inner rotating blade assembly comprises an outer ring and a horn cover, a plurality of guide leaves arranged in a ring array are arranged between the outer ring and the horn cover, and a plurality of inclined leaves are fixedly installed on the outer surfaces of the outer ring and the horn cover, and the bottom of the horn cover is provided with a plurality of spiral leaves arranged in a ring array.

[0014] The upper end of the guide leaf is provided with a mounting cover, the inside of the mounting cover is provided with a first sensor, the outer surface of the mounting cover is provided with a plurality of air guide grooves, the upper end of the first sensor is provided with an electrical slide, and the electrical slide is slidably installed in the conductive coil.

[0015] The application also provides a gas meter leakage alarm method, and the specific alarm method is as follows:

[0016] Step one, install the base mechanism on the top of the gas meter area, because the density of natural gas is less than air, the leaked gas will naturally gather upward, so the top installation is beneficial to quickly capture the leaked gas, after installation, the rotating assembly rotates at low speed, actively extracts the surrounding air, and introduces it into the net-fiber assembly, at the same time, the inner rotating blade assembly rotates synchronously with the rotating assembly, and the air flow is guided, the flow path of the air in the net-fiber assembly is changed, through the rotating movement of the inner rotating blade assembly, the gas sampling path of multiple points and multiple angles is realized in the net-fiber assembly, and the detection coverage range and response speed are improved;

[0017] Step two, during the air flow extraction process, the net-fiber assembly performs primary filtration on the entering air to prevent pollutants from entering the sensor and causing blockage or pollution, and the pretreated air then enters the substrate mechanism area, the substrate mechanism cooperates with the inner rotating blade assembly to realize high-precision detection of combustible gas components in the air.

[0018] The inside of the substrate mechanism is provided with a selective gas permeable membrane that only allows target gas to pass through, while blocking harmful substances that cause poisoning of the leakage alarm device, preventing the leakage alarm device from being exposed for a long time and causing sensitivity to decrease or fail.

[0019] In summary, the technical effects and advantages of the present application are as follows:

[0020] 1、The base mechanism is installed on the top of the gas leakage area, which fully utilizes the physical characteristics that the density of natural gas and other common fuels is less than air and the leaked gas is easy to gather upward, realizes the rapid capture of the leaked gas, significantly improves the timeliness and sensitivity of the detection, and the rotating assembly rotates at low speed after starting, actively extracts the surrounding air, forms a stable air flow into the equipment, the air flow is guided by the inner rotating blade assembly and enters the net-fiber assembly area, which not only realizes effective filtration of large particle impurities and protection of internal elements, but also realizes dynamic change of the air inlet direction and periodic scanning of the detection air flow path through the linkage design of the inner rotating blade assembly and the rotating assembly, forms a multi-point, wide-area coverage sampling mode to expand the detection range, and avoids the risk of missing detection caused by local air flow dead angle.

[0021] 2、The application constructs efficient and reliable gas sampling through the synergistic effect of multi-path air intake and composite filtering. With the rotation of the horn cover, the spiral leaves integrated in the horn cover rotate synchronously in the sealed tube, forming axial suction force, actively sucking air from the bottom of the device, filtering the airflow through the third floc cover, effectively removing dust and particulate matter accumulated near the ground, realizing the collection and coverage of low-zone airflow, and avoiding detection blind area. At the same time, the peripheral air extracted by the inclined leaves enters through the leakage hole on the outer cover and is subjected to secondary filtration by the second floc cover, intercepting medium-sized particulate pollutants, further improving the cleanliness of the intake air. Under the convergence and guidance of the horn cover and the boost of the guide leaves, the two-way airflow is efficiently introduced into the installation tube and discharged from the exhaust hole, forming a stable and continuous multi-channel airflow circulation, enhancing the gas renewal rate and response capability.

[0022] 3、The application significantly improves the accuracy, response speed and long-term stability of gas leakage detection by setting a dual-mode cooperative detection mechanism. In the process of continuous air suction, the first detection mode combines the floc assembly and the inner rotating leaf assembly to realize physical filtration and dynamic sampling. The floc assembly, as a primary filtration unit, effectively intercepts dust, oil mist, fibers and other large-particle pollutants in the air, preventing sensor contamination and channel blockage. At the same time, the inner rotating leaf assembly dynamically changes the intake direction during rotation, realizing alternate sampling of different spatial orientations and forming a mobile detection effect, eliminating the detection blind area of fixed-point sampling, improving the capture ability of sudden and local gas leakage. The second detection mode realizes high-selectivity component analysis through the substrate mechanism. The internal integrated PTFE membrane, anti-toxic catalytic layer or molecular sieve coating functional material has molecular-level screening capability, allowing only the target combustible gas to pass through, while blocking water vapor, organic silicon, sulfide and other interference substances that can cause sensor poisoning, thereby fundamentally reducing the sensor aging rate. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a first perspective three-dimensional structure schematic diagram of the gas meter leakage alarm device.

[0025] Figure 2 It is a second perspective three-dimensional structure schematic diagram of the gas meter leakage alarm device.

[0026] Figure 3 It is a first perspective three-dimensional connection structure sectional view of the gas meter leakage alarm device.

[0027] Figure 4 Figure 6 is a second perspective view of the gas meter leakage alarm device;

[0028] Figure 5 Figure 7 is a schematic view of the base mechanism and the base plate mechanism;

[0029] Figure 6 Figure 8 is a sectional view of the base mechanism and the base plate mechanism;

[0030] Figure 7 Figure 9 is a sectional view of the mesh assembly;

[0031] Figure 8 Figure 10 is a schematic view of the rotating blade mechanism and the mesh assembly;

[0032] Figure 9 Figure 11 is a sectional view of the mounting ring and the bottom ring;

[0033] Figure 10 Figure 12 is a schematic view of the rotating assembly and the inner rotating blade assembly;

[0034] Figure 11 Figure 13 is a sectional view of the rotating assembly;

[0035] Figure 12 Figure 14 is a schematic view of the rotating assembly;

[0036] Figure 13 Figure 15 is a schematic view of the inner rotating blade assembly;

[0037] Figure 14 Figure 16 is a sectional view of the inner rotating blade assembly;

[0038] Figure 15 Figure 17 is a sectional view of the horn cover and the guide blade.

[0039] In the figure: 1, base mechanism; 11, mounting plate; 12, mounting pipe; 13, air outlet hole; 14, tooth; 15, driving motor; 2, mesh assembly; 21, mounting ring; 22, first mesh cover; 23, second mesh cover; 24, sealing pipe; 25, third mesh cover; 26, bottom ring; 27, leakage hole; 28, air hole; 3, rotating blade mechanism; 31, rotating assembly; 311, inclined blade; 312, sliding ring sleeve; 313, tooth ring; 32, inner rotating blade assembly; 321, outer ring; 322, guide blade; 323, mounting cover; 324, first sensor; 325, horn cover; 326, spiral blade; 327, electric sliding sheet; 328, air guide groove; 4, base plate mechanism; 40, mounting frame; 41, sliding ring; 42, circuit base plate; 43, conductive coil; 44, high polymer filter shell; 45, electric support; 46, second sensor. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] Embodiment one, reference Figures 1 to 15 The gas meter leakage alarm device shown in the figure comprises a base mechanism 1, the inside of the base mechanism 1 is provided with a substrate mechanism 4 for preventing the performance of the leakage alarm from being degraded due to poisoning, the bottom of the substrate mechanism 4 is provided with a rotating blade mechanism 3 for extracting surrounding air for gas detection, and the bottom of the base mechanism 1 is provided with a mesh flocculation assembly 2 for filtering large-particle impurities in the air.

[0042] The rotating blade mechanism 3 comprises a rotating assembly 31 for extracting surrounding air and an inner rotating blade assembly 32 for guiding the direction of airflow and changing the flow path of air in the mesh flocculation assembly 2, thereby improving the contact efficiency of gas with the leakage alarm.

[0043] It is worth noting that the base mechanism 1 is installed on the top of the area where gas may leak. Since the density of common gas such as natural gas is less than that of air, the leaked gas will naturally rise and gather in the upper space. Therefore, the installation on the top is beneficial to timely capture of the leaked gas.

[0044] After installation, the rotating assembly 31 rotates at a low speed to actively extract surrounding air and guide the airflow into the inside of the equipment. The airflow is guided into the area of the mesh flocculation assembly 2 through the inner rotating blade assembly 32. The inner rotating blade assembly 32 not only plays a role in guiding the airflow, but also can rotate synchronously with the rotating assembly 31 to dynamically change the direction of incoming air and the detection airflow path, thereby improving the detection coverage range and response speed.

[0045] The base mechanism 1 is installed on the top of the area where gas may leak. The physical characteristics of common gas such as natural gas, i.e., the density of the gas is less than that of air and the leaked gas is easy to gather upward, are fully utilized to realize rapid capture of the leaked gas, thereby significantly improving the timeliness and sensitivity of detection. After the rotating assembly 31 is started, it operates at a low speed to actively extract surrounding air, thereby forming a stable airflow into the inside of the equipment. The airflow is guided into the area of the mesh flocculation assembly 2 through the inner rotating blade assembly 32. This assembly not only realizes effective filtration of large-particle impurities to protect the internal elements, but also realizes dynamic change of the direction of incoming air and periodic scanning of the detection airflow path through the linkage design of the inner rotating blade assembly 32 and the rotating assembly 31, thereby forming a multi-point and wide-area coverage sampling mode to expand the detection range and avoid the risk of missed detection caused by local airflow dead angle.

[0046] In the process of continuous air suction, the gas meter leakage alarm starts the dual-mode cooperative detection mechanism to ensure the detection accuracy and the long-term stability of the sensor.

[0047] Detection mode one: air first enters the net-fuzz assembly 2, which serves as a primary filtering unit to intercept dust, oil mist, fibers and other large-particle impurities in the air to prevent them from entering the interior and polluting the sensor. Then, in cooperation with the rotating flow guide design of the inner rotating blade assembly 32, it realizes alternate sampling of different spatial orientations, forms a mobile detection effect, avoids the blind area problem caused by single fixed sampling, and improves the capture ability of sudden leakage.

[0048] Detection mode two: the pre-processed air enters the substrate mechanism 4, which is internally provided with a selectively permeable functional material such as a PTFE film, a poison-resistant catalytic layer or a molecular sieve coating, allowing only the target combustible gas to pass through while blocking water vapor, organosilicon, sulfides and other interference components that may cause sensor poisoning.

[0049] The substrate mechanism 4 cooperates with the inner rotating blade assembly 32 to ensure stable air delivery while protecting the core sensor from pollution and preventing sensitivity decay or false alarms caused by long-term use.

[0050] The dual-mode cooperative detection mechanism significantly improves the accuracy, response speed and long-term stability of gas leakage detection. In the process of continuous air suction, the first detection mode combines the net-fuzz assembly 2 and the inner rotating blade assembly 32 to achieve physical filtration and dynamic sampling. The net-fuzz assembly 2 serves as a primary filtering unit to effectively intercept dust, oil mist, fibers and other large-particle pollutants in the air, preventing sensor pollution and channel blockage.

[0051] Meanwhile, the inner rotating blade assembly 32 dynamically changes the air inlet direction during rotation, realizing alternate sampling of different spatial orientations, forming a mobile detection effect, eliminating the detection blind area of fixed-point sampling, and improving the capture ability of sudden and local gas leakage. The second detection mode realizes high-selectivity component analysis through the substrate mechanism 4, which is internally integrated with PTFE film, poison-resistant catalytic layer or molecular sieve coating functional materials, with molecular-level screening capability, allowing only target combustible gases such as methane and propane to pass through while blocking water vapor, organosilicon, sulfides and other interference substances that easily cause sensor poisoning, thereby fundamentally reducing the aging rate of the sensor.

[0052] The substrate mechanism 4 cooperates with the inner rotating blade assembly 32 to ensure continuous and stable air delivery while effectively preventing sensitivity decay, zero drift and false alarm caused by pollution or chemical poisoning of the core sensor, significantly extending the service life and maintenance period of the device. The dual-mode cooperative mechanism realizes the organic combination of wide-area sampling and accurate identification, significantly improving the reliability of the gas leakage alarm device in complex environments.

[0053] The base mechanism 1 provided in embodiment one, this embodiment provides further technical solutions of the base mechanism 1.

[0054] The base mechanism 1 comprises a mounting plate 11, the lower end of the mounting plate 11 is provided with a mounting pipe 12, the outer surface of the mounting pipe 12 is provided with a plurality of exhaust holes 13, one side of the bottom of the mounting plate 11 is provided with a driving motor 15, and the output end of the driving motor 15 is provided with a gear tooth 14.

[0055] The rotating assembly 31 comprises a sliding ring sleeve 312, the sliding ring sleeve 312 is slidingly installed on the outer surface of the sliding ring 41, the outer surface of the sliding ring sleeve 312 is provided with a gear ring 313, and the gear ring 313 is engaged with the gear tooth 14, and the lower end of the sliding ring sleeve 312 is provided with a plurality of oblique leaves 311 arranged in an annular array.

[0056] It is worth noting that the mounting plate 11 is fixed to the wall or other mounting surface to realize the overall stable installation of the equipment, and when working, the driving motor 15 is started, the output shaft drives the gear tooth 14 to rotate, the gear tooth 14 is engaged with the gear ring 313, thereby driving the gear ring 313 to rotate synchronously, the gear ring 313 is connected with the sliding ring sleeve 312, thereby driving the sliding ring sleeve 312 to rotate along the outer peripheral surface of the mounting frame 40, and the rotation of the sliding ring sleeve 312 further drives the oblique leaves 311 fixed thereon to rotate synchronously, thereby realizing the active suction and directional flow guiding of the surrounding air.

[0057] The net and flocculus assembly 2 comprises a mounting ring 21, the outer surface of the mounting ring 21 is provided with a ventilation hole 28, the inner wall of the mounting ring 21 is provided with a first flocculus cover 22, and the mounting ring 21 is installed at the lower end of the mounting pipe 12.

[0058] The upper end of the guide leaf 322 is provided with a mounting cover 323, the inside of the mounting cover 323 is provided with a first sensor 324, the outer surface of the mounting cover 323 is provided with a plurality of air guide grooves 328, the upper end of the first sensor 324 is provided with an electric sliding sheet 327, and the electric sliding sheet 327 is slidingly installed in the inside of the conductive coil 43, and the inner rotating leaf assembly 32 comprises an outer ring 321 and a horn cover 325.

[0059] When the oblique leaf 311 rotates under the driving of the transmission mechanism, a negative pressure effect is generated, the air around the equipment is actively extracted, the airflow enters the annular chamber of the mounting ring 21 through the ventilation hole 28 provided on the outer cover, and the air entering the chamber is first subjected to primary filtration by the first flocculus cover 22, thereby effectively intercepting dust, oil mist and other large-particle pollutants, preventing them from entering the internal structure to cause blockage or pollution.

[0060] Meanwhile, the rotation of the oblique blade 311 drives the horn cover 325 and the outer ring 321 connected thereto to rotate synchronously through the linkage structure, and the outer ring 321 further drives the circumferentially arranged guide blades 322 to rotate. Since the horn cover 325 is in a gradually expanding horn structure, it can effectively converge and guide the airflow direction, improving the air intake efficiency, and the rotating guide blades 322 apply axial thrust to the airflow, forcing the filtered air into the installation pipe 12, and finally discharging through the exhaust holes 13 in the side wall, forming a stable internal airflow circulation channel;

[0061] During the airflow conveying process, the installation cover 323 rotates synchronously with the guide blade assembly, and the first sensor 324 integrated in the installation cover 323 also rotates synchronously, which enables the first sensor 324 to continuously and dynamically detect the gas concentration in the air at multiple spatial points covered by the rotating path, achieving mobile multi-point detection, improving the detection range and response speed, and avoiding the detection blind area problem of fixed sensors;

[0062] To ensure stable power supply for the sensor in the rotating state, a sliding electrical contact structure composed of an electrically sliding sheet 327 and a conductive coil 43 fixed to the base is provided to realize continuous and reliable power transmission between the rotating component and the stationary circuit, ensuring that the first sensor 324 is always in normal working state during continuous rotation.

[0063] Among them, the meshing transmission between the driving motor 15, the gear ring 313, the sliding ring sleeve 312 and the oblique blade 311 realizes the active inhalation and directional flow guiding of the surrounding air. After the airflow enters the installation ring 21 through the air hole 28, it is primarily filtered by the first mesh cover 22, effectively intercepting dust, oil mist and other large-particle pollutants to prevent internal component pollution or blockage. The rotation of the oblique blade 311 drives the horn cover 325, the outer ring 321 and the guide blades 322 to rotate synchronously through the linkage structure, wherein the gradually expanding structure of the horn cover 325 can efficiently converge the airflow, and the guide blades 322 apply axial thrust to force the filtered air into the installation pipe 12 and discharge through the exhaust holes 13, forming an efficient and stable multi-stage airflow circulation channel, improving the air intake efficiency and gas update speed;

[0064] The installation cover 323 rotates synchronously with the guide blade assembly, and the first sensor 324 integrated in the installation cover 323 also rotates synchronously, realizing continuous dynamic detection of multiple points in space and forming a mobile multi-point sampling mode, effectively eliminating the detection blind area of fixed sensors and significantly improving the capture ability and response speed of sudden gas leakage. At the same time, the sliding electrical contact structure composed of the electrically sliding sheet 327 and the conductive coil 43 provides continuous and reliable power supply for the first sensor 324 in the rotating state, ensuring its stable operation during long-term operation, achieving active sampling and multi-point monitoring, and significantly improving the detection sensitivity and coverage range of the gas leakage alarm device.

[0065] Embodiment three, according to the substrate mechanism 4 proposed in embodiment one, the embodiment provides further technical solutions of the substrate mechanism 4.

[0066] The substrate mechanism 4 comprises a mounting frame 40, the inner wall of the mounting frame 40 is provided with a circuit board 42, and the lower end of the mounting frame 40 is provided with a slip ring 41, and the lower end of the circuit board 42 is provided with a conductive coil 43.

[0067] The lower end of the mounting ring 21 is provided with a bottom ring 26, the outer surface of the bottom ring 26 is provided with a plurality of leakage holes 27 arranged in a ring array, the inner wall of the leakage hole 27 is provided with a second flocculation cover 23, the inner wall of the bottom ring 26 is provided with a sealing tube 24, and the inner wall of the sealing tube 24 is provided with a third flocculation cover 25.

[0068] A plurality of guide leaves 322 arranged in a ring array are arranged between the outer ring 321 and the horn cover 325, and a plurality of inclined leaves 311 are fixedly installed on the outer surfaces of the outer ring 321 and the horn cover 325, and the bottom of the horn cover 325 is provided with a plurality of spiral leaves 326 arranged in a ring array.

[0069] It is worth noting that with the rotation of the horn cover 325, the spiral leaves 326 integrated inside it rotate synchronously, the spiral leaves 326 are arranged inside the sealing tube 24, forming an axial airflow conveying structure, which produces a suction effect when rotating, sucking air from below at the bottom of the device, the airflow first passes through the third flocculation cover 25 for filtering, removing dust or particulate matter accumulated at the bottom, and then is transported to the inside of the horn cover 325 to participate in the mixing and flow guiding of the main airflow channel;

[0070] At the same time, when the inclined leaves 311 rotate to extract the surrounding air, part of the airflow enters the inside of the device through the leakage holes 27 arranged on the outer cover, and is filtered by the second flocculation cover 23 to intercept medium-sized particulate pollutants, further improving the cleanliness of the incoming air, and the filtered airflow is orderly introduced into the inside of the mounting tube 12 under the convergence and guidance of the horn cover 325 and the boost of the guide leaves 322, and finally is discharged through the exhaust hole 13, forming a complete multi-path airflow circulation.

[0071] The lower end of the circuit board 42 is provided with an electrical support 45, one end of the electrical support 45 is connected with a second sensor 46, and the outer surface of the second sensor 46 is sleeved with a high molecular filter shell 44.

[0072] Among them, the airflow entering the inside of the horn cover 325 will be further selectively filtered by the high molecular filter shell 44, which has a molecular sieve function and can allow the target combustible gas to selectively pass through, while blocking water vapor, oil mist, organic solvents and interfering components such as sulfides and silicides that may cause poisoning of the sensor;

[0073] The filtered pure gas enters the second sensor 46 inside, and high-precision concentration detection is performed, which not only improves the accuracy and response speed of detection, but also effectively protects the second sensor 46 from pollution and chemical poisoning, prolonging the service life thereof. Through the mechanism of selective filtration combined with accurate detection, reliable identification and real-time early warning of gas leakage are realized.

[0074] Among them, the present application constructs efficient and reliable gas sampling through the synergistic effect of multi-path air intake and composite filtration. As the horn cover 325 rotates, the spiral leaves 326 integrated inside it rotate synchronously in the sealed tube 24, forming an axial suction force that actively sucks air from the bottom of the device. The airflow is filtered through the third floc cover 25, effectively removing dust and particulate matter accumulated near the ground, achieving coverage of low-zone airflow and avoiding detection blind spots.

[0075] At the same time, the peripheral air extracted by the inclined leaves 311 enters through the leakage holes 27 on the outer cover and is subjected to secondary filtration by the second floc cover 23, intercepting medium-sized particulate pollutants and further improving the cleanliness of the intake air. Under the convergence and guidance of the horn cover 325 and the boost of the guide leaves 322, the two-way airflow is efficiently introduced into the installation tube 12 and discharged from the exhaust hole 13, forming a stable and continuous multi-channel airflow circulation, enhancing the gas renewal rate and response capability.

[0076] The airflow entering the horn cover 325 also needs to be selectively filtered by the high-molecular filter shell 44, allowing only the target combustible gas to pass through while blocking water vapor, oil mist, organic solvents, and harmful components such as sulfides and silicon compounds that can cause sensor poisoning. This fundamentally protects the second sensor 46 at the back end from pollution and chemical damage. The filtered pure gas enters the second sensor 46 for high-precision concentration analysis, significantly improving detection accuracy and early warning reliability, and realizing the organic integration of wide-area airflow coverage, high-purity intake protection, and anti-poisoning accurate detection.

[0077] Finally, it should be noted that: the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements of some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A gas meter leak alarm apparatus, characterised in that: The base mechanism (1) is internally provided with a base plate mechanism (4) for preventing performance degradation caused by poisoning of the leakage alarm, the bottom of the base plate mechanism (4) is provided with a rotating blade mechanism (3) for extracting ambient air for gas detection, and the bottom of the base mechanism (1) is provided with a net-fuzz assembly (2) for filtering large-particle impurities in the air. The rotating blade mechanism (3) comprises a rotating assembly (31) for extracting ambient air and an inner rotating blade assembly (32) for guiding the airflow direction and changing the flow path of the air in the net-fuzz assembly (2), thereby improving the contact efficiency of the gas with the leakage alarm. The base mechanism (1) comprises a mounting plate (11), the lower end of the mounting plate (11) is provided with a mounting pipe (12), the outer surface of the mounting pipe (12) is provided with a plurality of exhaust holes (13), one side of the bottom of the mounting plate (11) is provided with a drive motor (15), and the output end of the drive motor (15) is provided with a gear tooth (14). The base plate mechanism (4) comprises a mounting frame (40), the inner wall of the mounting frame (40) is provided with a circuit base plate (42), and the lower end of the mounting frame (40) is provided with a slip ring (41), and the lower end of the circuit base plate (42) is provided with a conductive coil (43). The lower end of the circuit base plate (42) is provided with an electrical support (45), one end of the electrical support (45) is connected with a second sensor (46), and the outer surface of the second sensor (46) is sleeved with a high-molecular filter shell (44). The rotating assembly (31) comprises a slip ring sleeve (312), the slip ring sleeve (312) is slidably installed on the outer surface of the slip ring (41), the outer surface of the slip ring sleeve (312) is provided with a gear ring (313), the gear ring (313) is engaged with the gear tooth (14), and the lower end of the slip ring sleeve (312) is provided with a plurality of oblique blades (311) arranged in an annular array. The inner rotating blade assembly (32) comprises an outer ring (321) and a horn cover (325), a plurality of guide blades (322) arranged in an annular array are arranged between the outer ring (321) and the horn cover (325), and a plurality of oblique blades (311) are fixedly installed on the outer surfaces of the outer ring (321) and the horn cover (325), and the bottom of the horn cover (325) is provided with a plurality of spiral blades (326) arranged in an annular array.

2. A gas meter leak alarm apparatus according to claim 1, wherein: The net-fuzz assembly (2) comprises a mounting ring (21), the outer surface of the mounting ring (21) is provided with a ventilation hole (28), the inner wall of the mounting ring (21) is provided with a first net-fuzz cover (22), and the mounting ring (21) is installed at the lower end of the mounting pipe (12).

3. A gas meter leak alarm apparatus according to claim 2, wherein: The lower end of the mounting ring (21) is provided with a bottom ring (26), the outer surface of the bottom ring (26) is provided with a plurality of leak holes (27) arranged in an annular array, the inner wall of the leak hole (27) is provided with a second net-fuzz cover (23), the inner wall of the bottom ring (26) is provided with a sealing pipe (24), and the inner wall of the sealing pipe (24) is provided with a third net-fuzz cover (25).

4. A gas meter leak alarm apparatus according to claim 1, wherein: The upper end of the guide vane (322) is provided with a mounting cover (323), the inside of the mounting cover (323) is provided with a first sensor (324), the outer surface of the mounting cover (323) is provided with a plurality of air guide grooves (328), the upper end of the first sensor (324) is provided with an electric sliding sheet (327), and the electric sliding sheet (327) is slidingly installed in the inside of the conductive coil (43).

5. A gas meter leak alarm method using the gas meter leak alarm device according to any one of claims 1 to 4, characterized in that, The specific alarm method is as follows: Step one, install the base mechanism (1) on the top of the gas meter area, because the density of natural gas is smaller than that of air, the leaked gas will naturally gather upward, so the top installation is beneficial to quickly capture the leaked gas, after installation, rotate the rotating assembly (31) at low speed, actively extract the surrounding air, and guide it into the inside of the net flocculation assembly (2), at the same time, the inner rotating vane assembly (32) rotates synchronously with the rotating assembly (31), guides the airflow, changes the flow path of the air in the net flocculation assembly (2), through the rotating movement of the inner rotating vane assembly (32), the gas sampling path of multiple points and multiple angles is carried out in the inside of the net flocculation assembly (2), the detection coverage range and response speed are improved; Step two, during the air flow extraction process, the net flocculation assembly (2) carries out primary filtration on the entering air, prevents the pollutants from entering the inside of the sensor to cause blockage or pollution, the pretreated air then enters the area of the substrate mechanism (4), the substrate mechanism (4) cooperates with the inner rotating vane assembly (32) to realize high-precision detection on the combustible gas components in the air; The inside of the substrate mechanism (4) is provided with a selective air permeable film, which only allows the target gas to pass through, at the same time, blocks the harmful substances that cause poisoning of the leakage alarm device, prevents the sensitivity of the leakage alarm device from being reduced or invalid due to long-term exposure.

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