Intelligent gas meter with dual-mode communication

Abstract

The application relates to the technical field of gas meters, in particular to a dual-mode communication intelligent gas meter, which comprises a gas meter with an air inlet and an air outlet, a gas pipe for connecting external pipelines, a sealing air bag arranged in the air inlet and abutting against the bottom and the outer side of the gas pipe to form a seal, a linkage sealing mechanism comprising a trigger part, a transmission part and a sealing execution part, the trigger part comprising a plurality of inclined surface sliding blocks arranged on the inner wall of the air inlet, the bottom end of the gas pipe abutting against the inclined surface sliding blocks when the gas pipe is inserted into the air inlet, the transmission part comprising a crank and a hinged seat linked with the inclined surface sliding blocks, the sealing execution part comprising a gas cavity for storing gas, the gas cavity being communicated with the sealing air bag through a gas conveying groove, and a leakage recovery assembly comprising an anti-leakage groove, the inlet end of the anti-leakage groove extending to the peripheral area of the sealing air bag.

Description

Technical Field

[0001] This invention relates to the field of gas meter technology, specifically to a smart gas meter with dual-mode communication. Background Technology

[0002] With the rapid development of IoT technology and the in-depth advancement of smart city infrastructure construction, smart gas meters, as important terminal devices for urban gas metering and management, are undergoing a transformation and upgrade from traditional mechanical meters to intelligent and networked ones. Traditional mechanical gas meters mainly rely on manual meter reading, which has inherent defects such as low meter reading efficiency, poor data accuracy, and inability to monitor gas consumption in real time, making it difficult to meet the urgent needs of modern urban gas management for real-time data, accuracy, and intelligence.

[0003] For example, patent document CN214251142U specifically relates to a gas meter. The gas meter includes: a meter connector with a limiting end face inside, used to connect to the gas meter's inlet or outlet; a metering element, with the meter connector sleeved on one end of the metering element, used to transport gas; and a rectifier, disposed inside the meter connector and clamped along the axial direction of the meter connector between the limiting end face and the metering element. According to this patent document, the rectifier is located along the axial direction of the meter connector between the limiting end face and the metering element. The limiting end face and the metering element together limit the rectifier to prevent it from moving or rotating within the meter connector, ensuring the stability of the gas rectification. When gas flows through the gas meter, the rectifier rectifies the flow field at the gas meter's inlet and outlet, making the flow field entering the metering element more uniform and stable. Simultaneously, the rectifier reduces the size of the gas meter, facilitating its installation.

[0004] While existing technologies have achieved effective rectification of the gas flow field by incorporating rectifiers, significantly improving metering accuracy, they still rely on a traditional single rubber sealing ring for static sealing at the gas interface. This design presents serious safety hazards in practical applications: with prolonged use, the sealing ring ages under the continuous erosion of the corrosive components of natural gas, resulting in a significant decrease in its elasticity; simultaneously, the periodic vibration of the internal diaphragm mechanism of the gas meter resonates with external environmental vibrations, causing the sealing ring to withstand alternating stress several times greater than under static conditions, accelerating its fatigue failure process; under the combined effects of pressure fluctuations and vibration, the sealing ring undergoes permanent deformation and fretting wear, forming micron-level leakage channels at the sealing interface, causing continuous gas leakage. Therefore, this application proposes a dual-mode communication smart gas meter. Summary of the Invention

[0005] The purpose of this invention is to provide a smart gas meter with dual-mode communication to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-mode communication smart gas meter, comprising a gas meter having an inlet and an outlet, and a gas pipe for connecting to an external pipeline, wherein the gas pipe is threadedly connected to the inlet via a fastening nut, and further comprising: A sealing airbag is installed inside the air inlet and forms a seal by contacting the bottom and outer side of the gas pipe. The linkage sealing mechanism includes a triggering part, a transmission part, and a sealing execution part; The triggering part includes multiple inclined sliders disposed on the inner wall of the air inlet. When the gas pipe is inserted into the air inlet, its bottom end abuts against the inclined slider. The transmission unit includes a crank and a hinge seat that are linked to the inclined plane slider; The sealing actuator includes a gas chamber for storing gas, and the gas chamber is connected to the sealing airbag through the gas delivery groove; A leak recovery assembly includes a leak-proof return channel, the inlet end of which extends to the outer peripheral region of the sealing airbag.

[0007] Preferably, the sealing actuator further includes a piston rod slidably connected to the air chamber, the hinge seat is fixedly connected to the outer surface of the piston rod, one end of the crank is rotatably connected to the inclined slider, the other end of the crank is rotatably connected to the side of the hinge seat, and a return spring for driving the piston rod to return to its original position is fixedly connected to the bottom of the hinge seat.

[0008] Preferably, a retaining ring is fixedly connected inside the air inlet, and multiple flow guide plates are arrayed along the central circumference inside the retaining ring. A connecting frame is fixedly connected to the top of the flow guide plates, and a traction handle fixedly connected to the connecting frame is rotatably connected inside the retaining ring. One end of the traction handle is connected to the top of the piston rod through a multi-joint connecting handle.

[0009] Preferably, the outer surface of the connecting frame is fixedly connected with a compression arc rod that abuts against the inner wall of the gas pipe.

[0010] Preferably, the leakage recovery assembly further includes a Venturi conduit located downstream of the air inlet, and a negative pressure conduit connecting the leak-proof return groove and the throat of the Venturi conduit.

[0011] Preferably, the negative pressure pipeline is provided with a first one-way valve, and the anti-leakage return groove is provided with a second one-way valve.

[0012] Preferably, one end of the anti-leakage return groove is provided with an elastic movable plug that reciprocates, and a vortex guide ring is rotatably connected at the inlet of the venturi pipe. The inner wall of the vortex guide ring is uniformly provided with multiple blades, and the outer periphery of the vortex guide ring is provided with protrusions that abut against the elastic movable plug. The gas flow drives the blades and the vortex guide ring to rotate, and the protrusions periodically squeeze the elastic movable plug, pumping the gas in the anti-leakage return groove into the negative pressure pipe.

[0013] Preferably, a sealing ring is fixedly connected inside the air inlet, and the sealing ring is located above the anti-leakage groove.

[0014] Preferably, a flow channel is provided between the air inlet and the flow channel, and a metering module and a communication module are installed in the gas meter.

[0015] Preferably, the metering module includes a diaphragm core disposed in the flow channel, a sensor for collecting the core rotation pulses, and a temperature and pressure sensor for monitoring the gas temperature and pressure. The communication module is a dual-mode communication unit that supports both remote and near-field communication.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the coordinated operation of the sealing airbag and the linkage sealing mechanism, an adaptive dynamic seal between the gas pipe and the air inlet is achieved, effectively overcoming the sealing failure problems caused by aging, vibration, and pressure fluctuations of traditional static sealing rings, and significantly improving the reliability and service life of the interface seal. The inclined slider, crank, hinge seat, piston rod, and return spring in the linkage sealing mechanism form a precise mechanical transmission chain, automatically converting the insertion action of the gas pipe into the inflation and expansion of the sealing airbag, realizing automated sealing during the installation process. The operation is convenient and the sealing effect is stable and reliable. The air intake control and support mechanism, through the linkage of the flow guide plate, connecting frame, extrusion arc rod, traction handle, and multi-joint connecting handle, provides radial support to the inner wall of the gas pipe while achieving sealing. The fixed design enhances the stability and vibration resistance of the connection structure. Simultaneously, the flow guide plate effectively shields the air inlet end of the snap-fit ​​ring when not connected, preventing dust and impurities from entering. The metering module adopts an integrated design of a diaphragm core, sensor, and temperature / pressure sensor. Combined with the rectification effect of the honeycomb rectifier within the flow channel, it ensures a uniform and stable gas flow field, improving metering accuracy and repeatability. The real-time monitoring function of the temperature / pressure sensor provides temperature and pressure compensation corrections for the metering data, ensuring the accuracy of the metering results. The dual-mode communication module integrates remote and near-field communication functions, enabling bidirectional data interaction between the gas meter and remote servers and mobile terminals. It supports remote meter reading, data management, and fault diagnosis, significantly improving the intelligence level and operational efficiency of gas management.

[0017] 2. The anti-leakage return groove extends to the outer periphery of the sealing airbag, forming a surrounding collection channel that effectively captures and collects trace amounts of gas leaking from the sealing interface. The Venturi pipe utilizes the Venturi effect generated by the normal flow of gas to create a stable negative pressure in the throat region. This negative pressure pipe actively draws in the leaking gas from the anti-leakage return groove and discharges it back into the main gas flow channel, achieving the recycling of the leaking gas. The first and second one-way valves are respectively installed in the negative pressure pipe and the anti-leakage return groove to ensure the unidirectional flow of gas, effectively preventing gas backflow and improving the reliability of system operation. The sealing ring is located above the anti-leakage return groove as the most... The final sealing line, together with the sealing airbag, forms a double sealing protection mechanism, effectively preventing gas leakage to the external environment even in extreme situations. The vortex guide ring rotates under the drive of the gas flow through its blades, causing the outer peripheral protrusions to periodically squeeze the elastic movable plug, forming an active pumping action. This significantly enhances the suction strength of the negative pressure pipeline and improves the recovery efficiency of leaked gas. At the same time, the reciprocating motion of the elastic movable plug ensures continuous and stable gas recovery capability. The entire leakage recovery component adopts a self-driven design, making full use of the gas flow energy to generate negative pressure and drive the pumping mechanism, requiring no additional energy consumption, thus saving energy and protecting the environment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the gas meter in this invention; Figure 3 This is a schematic cross-sectional view of the connection between the air inlet and the gas pipe in this invention. Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic cross-sectional view of the air inlet in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic cross-sectional view of the Chinese-language chute of the present invention. Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a schematic diagram of the current-guiding resistor in this invention.

[0019] In the diagram: 100, Gas meter; 101, Gas inlet; 102, Gas outlet; 103, Flow channel; 104, Gas pipe; 105, Fastening nut; 106, Honeycomb rectifier; 107, Snap ring; 200, Sealing airbag; 201, Gas delivery trough; 202, Gas chamber; 203, Piston rod; 300, Flow guide plate; 301, Connecting frame; 302, Extrusion arc rod; 303, Traction handle; 304, Multi-joint connecting handle; 305, Inclined slider; 306, Crank; 307, Hinge seat; 308, Return spring; 400, Sealing ring; 401, Anti-leakage groove; 402, Venturi pipe; 403, Vortex flow guide ring; 404, Negative pressure pipe; 405, First check valve; 406, Second check valve; 407, Elastic movable plunger; 408, Blade. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 - Figure 9 The present invention provides a technical solution: a smart gas meter with dual-mode communication, including a gas meter 100 having an inlet 101 and an outlet 102. The gas meter 100 is made of high-strength engineering plastic or metal material, which has excellent corrosion resistance and mechanical strength and can withstand pressure fluctuations and environmental changes during long-term use. The air inlet 101 and air outlet 102 adopt a standardized interface design, which facilitates quick connection with external gas pipelines of different specifications, while ensuring the sealing and reliability of the connection. The gas pipe 104 is used to connect to the external pipeline. The gas pipe 104 is threadedly connected to the air inlet 101 by a fastening nut 105. A flow channel 103 is opened between the air inlet 101 and the flow channel 103. A honeycomb rectifier 106 is fixedly connected in the flow channel 103. The metering module and communication module are set in the gas meter 100. By setting the air inlet 101, a stable connection relationship can be established with the fastening nut 105. The gas pipe 104 is fitted to the inner wall of the air inlet 101 to achieve high sealing performance.

[0022] The metering module includes a diaphragm mechanism housed within the flow channel 103, a sensor for collecting rotational pulses from the mechanism, and a temperature and pressure sensor for monitoring the gas temperature and pressure. The diaphragm mechanism employs a high-precision diaphragm design, using corrosion-resistant and aging-resistant fluororubber or silicone rubber, exhibiting excellent elasticity and sealing performance. Under gas pressure, the diaphragm reciprocates, converting the gas volume into the rotation of a mechanical counter's wheel via a precise linkage and gear mechanism, thus achieving accurate measurement of gas consumption. The sensor employs a high-sensitivity Hall effect sensor or magnetoresistive sensor, installed near the shaft or gear of the diaphragm mechanism, to detect the pulse signal generated when a magnet mounted on the shaft or gear passes by. Each pulse signal represents a fixed volume of gas passing through; accurate measurement of gas consumption is achieved by accumulating the number of pulse signals. The temperature and pressure sensor uses a high-precision digital sensor capable of real-time monitoring of gas temperature and pressure parameters.

[0023] The communication module is a dual-mode communication unit that supports both remote and near-field communication, including an NB-IoT communication module and a Bluetooth communication module.

[0024] The NB-IoT communication module employs low-power wide-area network (LPWAN) technology, offering advantages such as wide coverage, massive connectivity, and low power consumption, enabling stable remote data transmission in complex building environments. The NB-IoT module supports automatic network switching and roaming, ensuring reliable data uploads across different network coverage areas. The module features an ultra-low power design, with standby current less than 5μA and operating current less than 100mA, meeting the requirements for long-term battery-powered operation.

[0025] The Bluetooth communication module uses Bluetooth 5.0 or later technology, featuring high speed, low latency, and high reliability, enabling rapid data interaction with mobile terminals such as smartphones and tablets. The module supports BLE Low Energy Bluetooth technology, with standby current less than 1μA and operating current less than 10mA, facilitating rapid pairing and data transmission with mobile terminals. The module also supports OTA (Over-The-Air) firmware upgrades, facilitating remote maintenance and feature updates.

[0026] The dual-mode communication unit employs an intelligent switching mechanism, dynamically optimizing based on factors such as signal strength, data type, and power consumption. When the NB-IoT signal is strong, it prioritizes remote data upload using NB-IoT; when the NB-IoT signal is weak or unavailable, it automatically switches to Bluetooth mode, relaying data via a mobile terminal. The dual-mode communication unit also supports collaborative operation of both modes, for example, using Bluetooth for parameter configuration and fault diagnosis, while using NB-IoT for regular data uploads, achieving an optimal balance between communication efficiency and reliability.

[0027] It also includes a sealing airbag 200, which is disposed inside the air inlet 101 and abuts against the bottom and outer side of the gas pipe 104 to form a seal. By providing the sealing airbag 200, the sealing performance between the gas pipe 104 and the inner wall of the air inlet 101 can be improved.

[0028] It also includes a linkage sealing mechanism, which includes a triggering part, a transmission part, and a sealing execution part.

[0029] The triggering unit includes multiple inclined sliders 305 disposed on the inner wall of the air inlet 101, which function to sense the insertion of the gas pipe 104 into place. When the gas pipe 104 is inserted to the designed depth, its bottom end contacts the inclined surfaces of these inclined sliders 305 and applies pressure, forcing all inclined sliders 305 to synchronously produce radial outward displacement. This design converts the axial insertion force into a starting mechanical signal that triggers subsequent actions.

[0030] The transmission unit includes a crank 306 and a hinge seat 307 that are linked to the inclined plane slider 305, efficiently and reliably converting the radial displacement of the inclined plane slider 305 into linear motion. Specifically, one end of each crank 306 is rotatably connected to the corresponding inclined plane slider 305, and the other end is rotatably connected to a common hinge seat 307. When the inclined plane slider 305 moves outward, it pushes the crank 306 to swing, thereby pulling the hinge seat 307 to move axially downward. A return spring 308 is connected to the bottom of the hinge seat 307 to provide a return force for the system, driving all components to return to their initial positions when the gas pipe 104 is pulled out.

[0031] The sealing actuator includes a gas chamber 202 for storing gas. The gas chamber 202 is connected to the sealing airbag 200 through a gas delivery channel 201. By setting the gas chamber 202 and the gas delivery channel 201, gas can be supplied to the sealing airbag 200, causing it to expand and maintain a high-efficiency seal.

[0032] Furthermore, the sealing actuator also includes a piston rod 203 slidably connected to the air chamber 202, a hinge seat 307 fixedly connected to the outer surface of the piston rod 203, one end of the crank 306 rotatably connected to the inclined slider 305, and the other end of the crank 306 rotatably connected to the side of the hinge seat 307. A return spring 308 for driving the piston rod 203 to return to its original position is fixedly connected to the bottom of the hinge seat 307. The piston end of the piston rod 203 is located in the air chamber 202, and its driving end is connected to the transmission unit. When the piston rod 203 is driven down by the transmission unit, the gas in the compressed air chamber 202 is filled into the sealing airbag 200 through the gas delivery groove 201, causing it to expand and seal. The air chamber 202 is a closed cavity with a certain amount of gas or liquid pre-stored inside. The gas delivery groove 201 is a small channel connecting the air chamber 202 and the sealing airbag 200.

[0033] The piston rod 203 moves downward, compressing the gas in the gas chamber 202. The compressed gas is forced into the sealing gas bag 200 through the gas delivery groove 201. As gas is injected, the sealing gas bag 200 gradually expands and deforms, tightly fitting against the bottom end face and outer circumferential surface of the gas pipe 104, forming a flexible, self-adaptive annular high-pressure sealing band. The advantage is that this seal is dynamically applied, adaptively compensating for manufacturing tolerances, minor scratches, and vibration relaxation that may occur during long-term use of the gas pipe 104, making it more reliable and longer-lasting than traditional static O-ring seals.

[0034] Furthermore, a retaining ring 107 is fixedly connected inside the air inlet 101. Multiple flow-guiding baffles 300 are arrayed along the central circumference inside the retaining ring 107. In the initial closed state, these baffles converge, obscuring the air intake passage of the retaining ring 107 and also serving as dust prevention and initial flow guidance. A connecting bracket 301 is fixedly connected to the top of the flow-guiding baffles 300. A traction handle 303, fixedly connected to the connecting bracket 301, is rotatably connected inside the retaining ring 107. One side of the traction handle 303... The end is connected to the top of the piston rod 203 via the multi-joint connecting handle 304. The outer surface of the connecting frame 301 is fixedly connected to the extrusion arc rod 302 that abuts against the inner wall of the gas pipe 104. By setting the flow guide plate 300, the air inlet end of the buckle ring 107 can be blocked. When the piston rod 203 moves down, the multi-joint connecting handle 304 pulls the traction handle 303 and the connecting frame 301, driving each flow guide plate 300 to expand radially to support the inner wall of the gas pipe 104 and release the blockage of the air inlet end of the buckle ring 107.

[0035] When the piston rod 203 moves downward due to the sealing action, it pulls the traction handle 303 to rotate via the multi-joint connecting handle 304. The rotation of the traction handle 303 drives the connecting frame 301 to move, which in turn drives all the flow guide plates 300 to expand radially upward and outward like flower petals. After expansion, the compression arc rod 302 fixed to the outer surface of the connecting frame 301 will press tightly against the inner wall of the gas pipe 104, forming multi-point internal support. At the same time, the expansion of the flow guide plates 300 also fully opens the gas passage. The advantage of this design is that while achieving external airbag sealing, it automatically locks the gas pipe from the inside, greatly enhancing the vibration resistance and pull-out resistance of the connection point, and the support force is generated and released synchronously with the sealing pressure.

[0036] Specifically, in use, the gas pipe 104 is first inserted into the air inlet 101. When the bottom of the gas pipe 104 contacts the multiple inclined sliders 305, the inclined sliders 305 undergo lateral displacement along the guide rail under the action of the insertion force. The displacement of the inclined sliders 305 drives the hinge seat 307 and piston rod 203 to move downward through the lever action of the crank 306, compressing the gas in the gas chamber 202 and filling the sealing air bag 200 through the gas delivery groove 201.

[0037] Under the pressure of the internal gas, the sealing bladder 200 gradually expands, tightly fitting the bottom and outer side of the gas pipe 104 to form a multi-point contact sealing interface, effectively preventing gas leakage. At the same time, the downward movement of the piston rod 203 pulls the traction handle 303 to rotate through the connecting handle 304, thereby pulling the connecting bracket 301 and the flow guide plate 300 to expand radially, releasing the obstruction of the gas inlet end of the snap ring 107, allowing the gas to pass smoothly.

[0038] During the unfolding of the flow guide plate 300, the extrusion arc rod 302 abuts against the inner wall of the gas pipe 104, providing additional support and fixation, enhancing the stability and reliability of the connection. Subsequently, the rotating fastening nut 105 is threadedly connected to the air inlet 101, further securing the gas pipe 104 and ensuring the firmness of the connection.

[0039] When the gas enters the inlet 101 through the gas pipe 104, it first passes through the inlet end of the snap ring 107, and then enters the flow channel 103 inside the gas meter 100 through the venturi pipe 402. The gas is rectified by the honeycomb rectifier 106 in the flow channel 103 to form a uniform flow field before entering the diaphragm core.

[0040] Inside the diaphragm gas meter, the gas drives the diaphragm to reciprocate. A precise linkage and gear mechanism converts the gas volume into the rotation of a mechanical counter wheel, achieving accurate measurement of gas consumption. A magnet is mounted on the shaft or gears of the diaphragm gas meter. Each time the magnet passes a sensor, the sensor generates a pulse signal, with each pulse representing a fixed volume of gas passing through. By accumulating the number of pulse signals, accurate measurement of gas consumption is achieved.

[0041] Meanwhile, the temperature and pressure sensors monitor the gas temperature and pressure parameters in real time and transmit the data to the control unit. The control unit performs temperature and pressure compensation corrections on the pulse signals based on the sensor data, ensuring the accuracy and reliability of the metering results. The metering data is uploaded to a remote server via a dual-mode communication unit, enabling remote meter reading and data management.

[0042] In summary, through the coordinated operation of the sealing airbag 200 and the linkage sealing mechanism, an adaptive dynamic seal between the gas pipe 104 and the air inlet 101 is achieved, effectively overcoming the sealing failure problem caused by aging, vibration, and pressure fluctuations of traditional static sealing rings, and significantly improving the reliability and service life of the interface seal. The inclined slider 305, crank 306, hinge seat 307, piston rod 203, and return spring 308 in the linkage sealing mechanism form a precise mechanical transmission chain, automatically converting the insertion action of the gas pipe 104 into the inflation and expansion of the sealing airbag 200, achieving automated sealing during installation. This is convenient to operate and provides a stable and reliable sealing effect. The air intake control and support mechanism, through the coordinated operation of the flow guide plate 300, connecting frame 301, extrusion arc rod 302, traction handle 303, and multi-joint connecting handle 304, achieves sealing simultaneously with... The gas meter provides radial support and fixation to the inner wall of the gas pipe 104, enhancing the stability and vibration resistance of the connection structure. Simultaneously, the flow guide plate 300 effectively shields the inlet end of the snap ring 107 when not connected, preventing dust and impurities from entering. The metering module adopts an integrated design of a diaphragm core, sensor, and temperature and pressure sensor. Combined with the rectification effect of the honeycomb rectifier 106 within the flow channel 103, it ensures a uniform and stable gas flow field, improving metering accuracy and repeatability. The real-time monitoring function of the temperature and pressure sensor provides temperature and pressure compensation correction for the metering data, ensuring the accuracy of the metering results. The dual-mode communication module integrates remote and near-field communication functions, enabling bidirectional data interaction between the gas meter 100 and remote servers and mobile terminals. It supports remote meter reading, data management, and fault diagnosis, significantly improving the intelligence level and operational efficiency of gas management.

[0043] Example 2: Please refer to Figure 1 - Figure 9 This invention also provides a technical solution that not only prevents leakage as much as possible through mechanically sealed airbags and sealing rings, but also actively establishes a "safety containment and return barrier" to capture and collect any trace amounts of gas that may break through the main seal. Utilizing the fluid energy of the gas pipeline itself, it is safely transported back to the main flow for recycling, thereby preventing the accumulation of combustible gas in enclosed spaces such as the meter installation cavity. This technical solution differs from Embodiment 1 in that it includes a dual-mode communication smart gas meter, further comprising a leakage recovery component, which includes a leakage prevention return channel 401. The inlet end of the leakage prevention return channel 401 extends to the outer peripheral area of ​​the sealed airbag 200, and its inlet end precisely extends and exposes the outer area of ​​the interface between the sealed airbag 200 and the gas pipe 104. Once a trace amount of gas breaks through the blockage of the main sealed airbag 200, it will first be confined and guided into this channel, preventing it from freely diffusing into the gas meter housing or the external environment.

[0044] Furthermore, utilizing fluid dynamics principles, leaked gas extraction and return are achieved without external power. The leak recovery assembly also includes a Venturi pipe 402, located downstream of the air inlet 101, and a negative pressure pipe 404 connecting the anti-leakage return groove 401 and the throat of the Venturi pipe 402. A first one-way valve 405 is installed inside the negative pressure pipe 404, and a second one-way valve 406 is installed inside the anti-leakage return groove 401. A sealing ring 400 is fixedly connected inside the air inlet 101, located above the anti-leakage return groove 401. By positioning the sealing ring 400 within the anti-leakage return groove 401... The top thus forms the last line of defense. At this time, the gas leaking between the sealing airbag 200 and the gas pipe 104 will be sucked into the anti-leakage return groove 401. When the gas passes through the Venturi pipe 402, it will pass through quickly and, according to the Venturi effect, will draw gas from the negative pressure pipe 404. At this time, both the negative pressure pipe 404 and the anti-leakage return groove 401 will generate negative pressure, causing the anti-leakage return groove 401 to generate suction to draw in the leaked gas and merge it into the negative pressure pipe 404 through the second one-way valve 406. Afterward, the gas passes through the first one-way valve 405 in the negative pressure pipe 404 and is discharged back into the Venturi pipe 402.

[0045] The second one-way valve 406 is installed at the connection between the backflow preventer 401 and the negative pressure pipeline 404. Its function is to allow gas to flow from the backflow preventer 401 into the negative pressure pipeline 404 in one direction only, while preventing the gas in the main flow channel or the gas in the negative pressure pipeline from flowing back into the backflow preventer, and even blocking the risk when the pressure in the main flow channel is abnormal.

[0046] The first one-way valve 405 is installed in the negative pressure pipe 404, near its connection with the venturi pipe 402. Its function is to allow gas to flow unidirectionally from the negative pressure pipe 404 into the throat of the venturi pipe 402. This ensures that recovered leaked gas can only enter the mainstream and prevents high-speed mainstream gas from backflowing into the negative pressure pipe and the backflow prevention tank under abnormal conditions.

[0047] When the gas flows normally, the continuous negative pressure generated at the throat of the Venturi pipe 402 is transmitted to the backflow preventer 401 through the negative pressure pipe 404. This pressure difference creates a suction force, automatically "drawing out" the leaked gas accumulated in the backflow preventer 401. The leaked gas sequentially pushes open the second one-way valve 406, flows through the negative pressure pipe 404, and then pushes open the first one-way valve 405. Finally, it mixes with the main gas flow at high speed at the throat of the Venturi pipe 402 and is carried away, re-entering the metering and consumption cycle. The advantages of this process are that it is completely passive, consumes zero energy, has high reliability, and is significantly efficient under medium to high flow conditions.

[0048] Furthermore, to address the issues of weakened Venturi effect and insufficient negative pressure during the start-up and shutdown of the gas stove or when using very low gas flow, one end of the anti-leakage return groove 401 is equipped with a reciprocating elastic movable plug 407. A vortex guide ring 403 is rotatably connected to the inlet of the Venturi pipe 402. Multiple blades 408 are evenly arranged on the inner wall of the vortex guide ring 403, and protrusions that abut against the elastic movable plug 407 are provided on the outer periphery of the vortex guide ring 403. The gas flow drives the blades 408 and the vortex guide ring... The flow ring 403 rotates, and the protrusions periodically squeeze the elastic movable plug 407, pumping the gas in the anti-leakage return groove 401 into the negative pressure pipe 404. In order to enhance the suction strength of the negative pressure pipe 404, the blades 408 are set to rotate under the influence of the gas, which drives the vortex guide ring 403 to rotate periodically, driving the protrusions on its outer surface to squeeze the elastic movable plug 407, so that the elastic movable plug 407 pumps gas into the negative pressure pipe 404 and simultaneously draws gas from the anti-leakage return groove 401 when it resets.

[0049] The gas flow drives the blades 408 and the vortex guide ring 403 to rotate continuously. When the protrusion on the outer circumference of the guide ring rotates to contact the end of the elastic movable piston 407, it squeezes the piston into the pump chamber for a pumping stroke, compressing the gas in the front of the pump chamber leading to the negative pressure pipeline, increasing its pressure, which helps to push open the first one-way valve 405 and pump the gas into the negative pressure pipeline 404. When the protrusion rotates past, the elastic movable piston 407 returns to its suction stroke under the action of its own elastic element, creating a partial vacuum in the pump chamber, drawing in new leaked gas from the anti-leakage return groove 401 side, and replenishing it through the second one-way valve 406. This cycle repeats continuously, forming a miniature reciprocating piston pump driven by the gas flow.

[0050] Leakage occurs: In extreme cases, a small amount of gas may break through the seal of the main sealing gasbag 200.

[0051] Initial isolation and collection: Leaking gas will encounter the second barrier of the sealing ring 400, and the gas is intercepted and collected in the leakage prevention return groove 401 on its periphery.

[0052] Passive recovery startup: As long as the gas is in use, a negative pressure is generated at the throat of the Venturi pipe 402. This negative pressure is conducted through the negative pressure pipe 404 and draws gas from the anti-return groove 401 via the second one-way valve 406. The extracted mixed gas, mainly air and a trace amount of gas, is injected into the main flow through the first one-way valve 405. Simultaneously, the gas flow drives the vane 408 and the vortex guide ring 403 to rotate. The cam periodically squeezes the elastic movable plunger 407, which acts as a piston, actively pumping the gas in the anti-return groove 401 area into the negative pressure pipe 404, greatly enhancing the recovery power and reliability at low flow rates.

[0053] In summary, the backflow prevention groove 401 extends to the outer periphery of the sealing airbag 200, forming a surrounding collection channel that can effectively capture and collect trace amounts of gas leaking from the sealing interface. The Venturi pipe 402 utilizes the Venturi effect generated by the normal flow of gas to create a stable negative pressure in the throat region. Through the negative pressure pipe 404, the leaked gas in the backflow prevention groove 401 is actively drawn in and discharged back to the main gas channel, achieving the recycling of the leaked gas. The first one-way valve 405 and the second one-way valve 406 are respectively installed in the negative pressure pipe 404 and the backflow prevention groove 401, ensuring the unidirectional flow of gas, effectively preventing gas backflow, and improving the reliability of system operation. The sealing ring 400 is located in the backflow prevention groove. Above 401, as the last line of defense, a double-sealing protection mechanism is formed with the sealing airbag 200, which can effectively prevent gas leakage to the external environment even in extreme cases. The vortex guide ring 403 rotates under the drive of the gas flow through the blades 408, which drives the outer peripheral protrusions to periodically squeeze the elastic movable plug 407, forming an active pumping effect. This significantly enhances the suction strength of the negative pressure pipeline 404 and improves the recovery efficiency of leaked gas. At the same time, the reciprocating motion of the elastic movable plug 407 ensures continuous and stable gas recovery capability. The entire leakage recovery assembly adopts a self-driven design, making full use of the gas flow energy to generate negative pressure and drive the pumping mechanism, without the need for additional energy consumption, which is energy-saving and environmentally friendly.

[0054] Working principle: During use, the gas pipe 104 is connected to the air inlet 101, and the fastening nut 105 is screwed into the air inlet 101 to fix the gas pipe 104. When the bottom of the gas pipe 104 is inserted into the air inlet 101, it will abut against multiple inclined sliders 305. At this time, the inclined sliders 305 are displaced by force, which drives one end of the crank 306 to move. The other end of the crank 306 will drive the hinge seat 307 to move down, which will squeeze the piston end of the piston rod 203 to move down. The piston end of the piston rod 203 will move in the gas chamber 202, which will squeeze the gas in the gas chamber 202 and deliver it to the inside of the sealing air bag 200 through the gas delivery groove 201. The gas in the sealing air bag 200 increases and gradually expands, further adhering to the bottom and outer side of the gas pipe 104, achieving efficient sealing. At the same time, when the piston rod 203 moves down, it will pull the top of the connecting handle 304 to move, so that the connecting handle 304 pulls the traction handle 303 to rotate, thereby pulling the connecting frame 301 to move, thereby pulling the flow guide plate 300 to move up and unfold, so that the air inlet end of the buckle ring 107 can be opened. At the same time, when the connecting frame 301 is pulled open by force, it will abut against the inner wall of the gas pipe 104 to support and fix it. When the gas enters the inlet 101 through the gas pipe 104, it first passes through the inlet end of the snap ring 107 and then through the Venturi pipe 402 into the flow channel 103 inside the gas meter 100. A diaphragm mechanism is installed in the flow channel 103, where the gas drives the diaphragm to reciprocate. Through a linkage and gear mechanism, the gas volume is converted into the rotation of the digits of a mechanical counter. A magnet is installed on the shaft or gear of the diaphragm mechanism. Each time the magnet passes the sensor, a pulse signal is generated. Each pulse represents a fixed volume of gas passing through. Simultaneously, a temperature and pressure sensor monitors the temperature and pressure of the gas in real time. When the gas passes through the Venturi pipe 402, it will pass through rapidly, creating a negative pressure in the negative pressure pipe 404. This negative pressure then draws gas from the anti-return groove 401. One end of the anti-return groove 401 extends to the outside of the gas pipe 104, allowing some of the gas passing through the sealing bladder 200 to be actively drawn into the anti-return groove 401 by the sealing ring 400. A second one-way valve 406 is installed in the anti-return groove 401, allowing gas to flow unidirectionally through one end of the anti-return groove 401 into the negative pressure pipe 404. A first one-way valve 405 is installed inside 404 to allow gas to enter the Venturi pipe 402 in one direction. At the same time, before passing through the Venturi pipe 402, the gas will come into contact with the blade 408 and drive the vortex guide ring 403 to rotate. The protrusions on the outer surface of the vortex guide ring 403 will continuously come into contact with the elastic movable plug 407, so that the elastic movable plug 407 squeezes the gas in the anti-leakage return groove 401 and pumps it into the negative pressure pipe 404. Meanwhile, an elastic element is provided on one side of the elastic movable plug 407 to allow the elastic movable plug 407 to reset.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart gas meter with dual-mode communication, comprising a gas meter (100) having an inlet (101) and an outlet (102), and a gas pipe (104) for connecting to an external pipeline, the gas pipe (104) being threadedly connected to the inlet (101) by a fastening nut (105), characterized in that, Also includes: A sealing airbag (200) is disposed inside the air inlet (101) and abuts against the bottom and outer side of the gas pipe (104) to form a seal; The linkage sealing mechanism includes a triggering part, a transmission part, and a sealing execution part; The triggering part includes a plurality of inclined sliders (305) disposed on the inner wall of the air inlet (101). When the gas pipe (104) is inserted into the air inlet (101), its bottom end abuts against the inclined sliders (305). The transmission unit includes a crank (306) and a hinge seat (307) that are linked to the inclined plane slider (305). The sealing actuator includes a gas chamber (202) for storing gas, and the gas chamber (202) is connected to the sealing airbag (200) through a gas delivery channel (201); The leakage recovery assembly includes a leak-proof return channel (401) whose inlet end extends to the outer peripheral region of the sealing airbag (200).

2. The smart gas meter with dual-mode communication according to claim 1, characterized in that: The sealing actuator also includes a piston rod (203) slidably connected in the air chamber (202), a hinge seat (307) fixedly connected to the outer surface of the piston rod (203), one end of the crank (306) rotatably connected to the inclined slider (305), the other end of the crank (306) rotatably connected to the side of the hinge seat (307), and a return spring (308) for driving the piston rod (203) to return to its original position is fixedly connected to the bottom of the hinge seat (307).

3. The smart gas meter with dual-mode communication according to claim 2, characterized in that: The air inlet (101) is fixedly connected to a snap ring (107). The snap ring (107) has multiple flow guide plates (300) arranged in a circular array along its center. The top of the flow guide plates (300) is fixedly connected to a connecting frame (301). The snap ring (107) is rotatably connected to a traction handle (303) that is fixedly connected to the connecting frame (301). One end of the traction handle (303) is connected to the top of the piston rod (203) through a tenon joint handle (304).

4. A smart gas meter with dual-mode communication according to claim 3, characterized in that: The outer surface of the connecting frame (301) is fixedly connected to a compression arc rod (302) that abuts against the inner wall of the gas pipe (104).

5. A smart gas meter with dual-mode communication according to claim 1, characterized in that: The leakage recovery assembly also includes a Venturi pipe (402) located downstream of the air inlet (101) and a negative pressure pipe (404) connecting the leakage return groove (401) and the throat of the Venturi pipe (402).

6. A smart gas meter with dual-mode communication according to claim 5, characterized in that: The negative pressure pipeline (404) is equipped with a first check valve (405), and the anti-leakage return groove (401) is equipped with a second check valve (406).

7. A smart gas meter with dual-mode communication according to claim 6, characterized in that: One end of the anti-leakage return groove (401) is provided with an elastic movable plug (407) that reciprocates. A vortex guide ring (403) is rotatably connected at the inlet of the venturi pipe (402). Multiple blades (408) are evenly arranged on the inner wall of the vortex guide ring (403). A protrusion that abuts the elastic movable plug (407) is provided on the outer periphery of the vortex guide ring (403). The gas flow drives the blades (408) and the vortex guide ring (403) to rotate. The protrusion periodically squeezes the elastic movable plug (407) to pump the gas in the anti-leakage return groove (401) into the negative pressure pipe (404).

8. A smart gas meter with dual-mode communication according to claim 5, characterized in that: A sealing ring (400) is fixedly connected inside the air inlet (101), and the sealing ring (400) is located above the anti-leakage groove (401).

9. A smart gas meter with dual-mode communication according to claim 1, characterized in that: A flow channel (103) is provided between the air inlet (101) and the flow channel (103), and a metering module and a communication module are provided in the gas meter (100).

10. A smart gas meter with dual-mode communication according to claim 9, characterized in that: The metering module includes a diaphragm core disposed in the flow channel (103), a sensor for collecting the core rotation pulses, and a temperature and pressure sensor for monitoring the gas temperature and pressure. The communication module is a dual-mode communication unit that supports remote communication and near-field communication.

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