Detection system and detection method for hydrogen leakage of hydrogen hydrogenation machine

Abstract

The invention discloses a hydrogen leakage detection system and method for a hydrogenation machine, the internal area of the hydrogenation machine is partitioned by using a partition plate assembly, a gas identification hole, a communication hole, a vent hole and a gas exhaust hole are formed in a partition plate, and when a communication valve, a gas transmission switch and a gas exhaust switch are closed, a region block can independently form a sealing section; the hydrogen leakage identification range is rapidly narrowed, the leakage position detection accuracy is higher, the displacement sensor installed on the gas identification hole is used for detecting the vibration condition when the diaphragm senses the gas pressure change so as to judge the gas pressure in the area block and the gas pressure change, and the hydrogen detection sensor is used for detecting the hydrogen leakage amount in the area block. For leaked hydrogen, the stability of the environment in an area block can be guaranteed through the gas stabilizing system, the discharged hydrogen is absorbed, corrosion damage to detection components is reduced, the hydrogen leakage position is analyzed, judged and locked through the remote control terminal, online remote monitoring of hydrogen leakage of the hydrogen adding machine is achieved, and the hydrogen leakage detection safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen leakage detection for hydrogen dispensers. More specifically, the present invention relates to a detection system and a detection method for hydrogen leakage of a hydrogen dispenser. Background Art

[0002] As a key infrastructure for hydrogen fuel cell vehicles, the reliability and safety of hydrogen leakage detection for hydrogen dispensers are of crucial importance. However, the physical and chemical properties of hydrogen itself, such as small molecules, fast diffusion, flammability, and explosiveness, pose significant challenges to leakage detection. Currently, the mainstream sensor detection technologies for hydrogen leakage of hydrogen dispensers mainly include using electrochemical sensors, semiconductor sensors, infrared absorption sensors, and ultrasonic detection. However, electrochemical sensors have a short lifespan and are vulnerable to temperature and humidity effects, semiconductor sensors are easily interfered by other gases, infrared absorption sensors are costly and require complex optical systems, and ultrasonic detection is greatly interfered by environmental noise and has low positioning accuracy. Generally speaking, the operating conditions of hydrogen dispensers are complex and prone to interfering with the detection results. The working pressure of hydrogen dispensers is high, usually 35 - 70 MPa. Under high-pressure environments, sealing materials are prone to fatigue failure, leakage points change dynamically, environmental temperature and humidity fluctuations, vibrations, and electromagnetic interference may affect the stability of sensors. The rapid flow of hydrogen during the refueling process causes local pressure fluctuations, which are prone to trigger false alarms, and most detection methods are limited to manual handheld and mobile detection equipment, with high safety risks. How to both reduce the detection cost and improve the detection accuracy and safety has become a major technical difficulty in this field. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and provide at least the advantages described later.

[0004] Another object of the present invention is to provide a detection system and a detection method for hydrogen leakage of a hydrogen dispenser to solve the technical problem of low efficiency in detecting hydrogen leakage of a hydrogen dispenser in the prior art.

[0005] To achieve these objects and other advantages according to the present invention, on the one hand, the present invention provides a detection system for hydrogen leakage of a hydrogen dispenser, including: A partition component, which is arranged inside the hydrogen dispenser housing to divide the internal structure of the hydrogen dispenser into multiple regional blocks. Sealing rings are sleeved on the partition when passing through the internal structure of the hydrogen dispenser. Identification holes, communication holes, ventilation holes, and exhaust holes are respectively and penetratingly opened on the partitions between adjacent regional blocks; A stable gas system, which includes a diaphragm covering the identification hole, a communication valve sealed on the communication hole. Each ventilation hole is respectively connected to a gas transmission pipe through a branch pipe and a gas transmission switch is arranged on the ventilation hole. Each exhaust hole is respectively connected to an exhaust pipe through a branch pipe and an exhaust switch is arranged. The exhaust pipe is connected to an external hydrogen treatment device, and a protective gas pumping device is externally connected to the gas transmission pipe; A module system, which includes a displacement sensor, a hydrogen detection sensor, and a remote control terminal. The displacement sensor is adhered to the diaphragm and is used to detect the vibration of the diaphragm when it senses the air pressure change. The bottom surface of the partition board at the top of each area block is fixedly provided with a hydrogen detection sensor. Each displacement sensor, communication valve, gas transmission switch, exhaust switch, and hydrogen detection sensor are respectively connected to the remote control terminal to control the operation of the communication valve, gas transmission switch, and exhaust switch and obtain the detection data of the displacement sensor and hydrogen detection sensor.

[0006] Preferably, a groove for placing a hydrogenation gun is recessed on one side of the outer shell of the hydrogenation machine. At the place where the hydrogenation gun is placed in the groove, an installation groove is provided on the outer side of the hydrogenation machine located outside the groove. The installation groove is used for sealing and installing a detection isolation cover. The detection isolation cover has a transparent window. A hydrogen adsorption layer is provided on the top of the detection cover, and a hydrogen-sensitive color-changing material layer is provided on the outside of the adsorption layer. Whether there is hydrogen leakage at the hydrogenation gun is identified by observing the color change of the hydrogen-sensitive color-changing material layer.

[0007] Preferably, a color recognition sensor module is provided on the detection isolation cover facing the hydrogen-sensitive color-changing material layer for recognizing color changes. The color recognition sensor module is communicatively connected to the remote control terminal.

[0008] On the other hand, the present invention also provides a method for detecting hydrogen leakage of a hydrogenation machine, including the following steps: S1. Divide the internal structure of the hydrogenation machine into area blocks, detachably set partition boards on the boundary surfaces of the area blocks, set a sealing ring to sleeve when passing through the internal structure of the hydrogenation machine, adhere a displacement sensor to the diaphragm, fix a hydrogen detection sensor on the bottom surface of the partition board at the top of each area block, connect an air inlet pipe to each area block at the ventilation hole, connect an exhaust pipe to the exhaust hole, connect the exhaust pipe to an external hydrogen treatment device, and externally connect a protective gas pumping device to the air inlet pipe; S2. When the hydrogenation machine is working, the communication valve is first in an open state, the gas transmission switch and the exhaust switch are closed, the internal spaces of the area blocks are communicated through the communication holes, receive the real-time detection data of the displacement sensor and the hydrogen detection sensor through the remote control terminal, construct a corresponding three-dimensional structure model for the positions of all area blocks corresponding in the hydrogenation machine, and mark the displacement change law of the displacement sensor under normal operation of the hydrogenation machine; S3. When the hydrogen detection sensor detects leaked hydrogen, at the same time, observe and analyze the displacement data of each displacement sensor, compare with the displacement change law under normal operation, mark on the three-dimensional structure model accordingly, and sort and label according to the magnitude of the data change of the displacement sensor and the hydrogen detection sensor; S4. Close all the corresponding connecting valves on the area blocks corresponding to the labels where the hydrogen detection sensor does not detect hydrogen leakage to form an independent space, and mark the remaining area blocks as possible hydrogen leakage areas; S5. Open the gas supply switch and the exhaust switch in the possible hydrogen leakage areas, introduce a protective gas, and at the same time discharge the leaked gas containing hydrogen, and keep the pressure and flow rate of the introduced and discharged gas consistent. For the area blocks on the exhaust path where the hydrogen detection sensor no longer detects hydrogen leakage, sequentially close the exhaust switch, the ventilation switch, and the connecting valve, and combine the sorting labels arranged in S3 to narrow the source position of the hydrogen leakage area block to less than three area blocks; S6. For the area blocks whose sources are narrowed in step S5, close the connecting valve, introduce a protective gas to independently replace the hydrogen-containing gas in the area block, and then close the corresponding gas supply switch and exhaust switch. Lock the area block where the hydrogen leakage source is located through the data changes of the hydrogen detection sensor and the displacement sensor.

[0009] Preferably, a section of continuous pipeline in the hydrogen filling machine is divided into one area block.

[0010] Preferably, in step S5, the sorting method is as follows: Perform the first weight parameter marking order in the time sequence when each hydrogen detection sensor detects hydrogen leakage in the corresponding area block, use the change amplitude of the displacement sensor as the second weight parameter marking order, and use the size of the concentration detection data obtained by the hydrogen detection sensor as the third weight parameter marking order. According to the three weight parameter orders, analyze the leakage source and diffusion path of hydrogen leakage, and screen and narrow the source position of the hydrogen leakage area block.

[0011] The present invention has at least the following beneficial effects: The hydrogen leakage detection system and its detection method for the hydrogen filling machine use the partition component to divide the internal area of the hydrogen filling machine into blocks, set identification holes, communication holes, ventilation holes, and exhaust holes on the partition. When the connecting valve, the gas supply switch, and the exhaust switch are closed, the area block can independently form a sealed section, quickly narrowing the hydrogen leakage identification range, with higher accuracy in detecting the leakage position. At the same time, it avoids the diffusion of leaked hydrogen and affects the operation safety of equipment in other area blocks. The displacement sensor installed on the identification hole is used to detect the vibration condition when the diaphragm senses the pressure change to judge the pressure and pressure change in the area block. The hydrogen detection sensor is used to detect whether hydrogen leakage occurs in the area block. For the leaked hydrogen, the stable gas system can also ensure the stability of the environment in the area block, discharge the hydrogen for absorption treatment, reduce the corrosion damage to the set components, and lock the hydrogen leakage position through the analysis and judgment of the remote control terminal, realizing the online remote monitoring of hydrogen leakage in the hydrogen filling machine and improving the safety of hydrogen leakage detection.

[0012] Other advantages, objectives, and features of the present invention will be partially reflected in the following description and partially understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the communication line connection of the hydrogen leakage detection system of the hydrogen refueling machine of the present invention. Detailed Embodiments

[0014] The following further describes the present invention in detail with reference to the drawings so that those skilled in the art can implement it according to the text of the specification.

[0015] It should be noted that in the following experimental methods described in the embodiments, unless otherwise specified, they are all conventional methods, and the reagents and materials, unless otherwise specified, can all be obtained from commercial channels; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention.

[0016] As Figure 1 shown, the present invention provides a hydrogen leakage detection system for a hydrogen refueling machine, including: A partition assembly, which is arranged inside the housing of the hydrogen refueling machine to divide the internal structure of the hydrogen refueling machine into multiple regional blocks. Sealing rings are sleeved on the partition when passing through the internal structure of the hydrogen refueling machine. Identification holes, communication holes, ventilation holes, and exhaust holes are respectively opened through the partitions between adjacent regional blocks. A gas stabilization system, which includes a diaphragm covering the identification hole and a communication valve sealed on the communication hole. Each ventilation hole is respectively connected to a gas transmission pipe through a branch pipe and a gas transmission switch is arranged on the ventilation hole. Each exhaust hole is respectively connected to an exhaust pipe through a branch pipe and an exhaust switch is arranged. The exhaust pipe is connected to an external hydrogen treatment device, and the outside of the gas transmission pipe is connected to a protective gas pumping device. A module system, which includes a displacement sensor, a hydrogen detection sensor, and a remote control terminal. The displacement sensor is adhered to the diaphragm to detect the vibration condition of the diaphragm when it senses the air pressure change. The bottom surface of the partition at the top of each regional block is respectively fixed with a hydrogen detection sensor. Each displacement sensor, communication valve, gas transmission switch, exhaust switch, and hydrogen detection sensor are respectively connected to the remote control terminal to control the operation of the communication valve, gas transmission switch, and exhaust switch and obtain the detection data of the displacement sensor and hydrogen detection sensor.

[0017] The arrangement and use of the detection system are carried out according to the following steps: S1. Divide the internal structure of the hydrogen refueling machine into regional blocks. Partition plates are detachably arranged on the boundary surfaces of the regional blocks. When passing through the internal structure of the hydrogen refueling machine, the partition plates are sleeved with sealing rings. Identification air holes are penetrated and opened on the partition plates between adjacent regional blocks. A diaphragm is covered on the identification air holes, and a displacement sensor is adhered to the diaphragm. The bottom surface of the partition plate at the top of each regional block is fixed with a hydrogen detection sensor. Communication holes, ventilation holes, and exhaust holes are penetrated and opened on the partition plates between adjacent regional blocks. A communication valve is hermetically arranged on the communication hole. Each ventilation hole is connected to a gas transmission pipe through a branch pipe and a gas transmission switch is arranged on the ventilation hole. Each exhaust hole is connected to an exhaust pipe through a branch pipe and an exhaust switch is arranged. The exhaust pipe is connected to an external hydrogen treatment device. The outside of the gas transmission pipe is connected to a protective gas pumping device. A remote control terminal is set. Each displacement sensor, communication valve, gas transmission switch, exhaust switch, and hydrogen detection sensor is respectively connected to the remote control terminal. The displacement sensor and the hydrogen detection sensor can be selected from commercially available products with high sensitivity. The sensor module, remote control switch, and communication valve arranged inside the hydrogen refueling machine are powered by the power supply inside the hydrogen refueling machine.

[0018] S2. When the hydrogen refueling machine is working, the communication valve is first in the open state, the gas transmission switch and the exhaust switch are closed, and the internal spaces of each regional block are communicated through the communication holes. Receive the real-time detection data of the displacement sensor and the hydrogen detection sensor through the remote control terminal, construct a corresponding three-dimensional structure model for the positions of all regional blocks in the hydrogen refueling machine, and mark the displacement change law of the displacement sensor under normal operation of the hydrogen refueling machine. The three-dimensional structure model can be divided according to the working principle of the internal system structure of the hydrogen refueling machine. Hydrogen enters the hydrogen inlet pipeline of the hydrogen refueling machine from the gas source interface, and successively passes through the gas filter, inlet valve, mass flow meter, hydrogen refueling hose, breakaway valve, and hydrogen refueling gun, and then is filled into the vehicle hydrogen storage cylinder through the vehicle hydrogen refueling port. It can be initially divided into six to nine regional blocks, such as the separated gas filtration section, inlet valve and mass flow measurement section, safety valve section, hydrogen refueling hose section, breakaway valve outlet section, relief pipe section, and blow-off pipe section, etc.

[0019] S3. When the hydrogen detection sensor detects leaked hydrogen, at the same time, observe and analyze the displacement data of each displacement sensor, compare with the displacement change law under normal operation to eliminate detection errors, mark it on the three-dimensional structure model, and sort and number according to the magnitude of the data change of the displacement sensor and the hydrogen detection sensor. Generally, it is considered that the regional block where the hydrogen detection sensor appears first, and the detected hydrogen concentration is the highest and the displacement amplitude detected by the displacement sensor is the largest, has the greatest possibility of being the hydrogen leakage source section.

[0020] S4. Close all the corresponding connecting valves on the area blocks corresponding to the labels where the hydrogen detection sensor does not detect hydrogen leakage to form an independent space, and mark the remaining area blocks as possible hydrogen leakage areas.

[0021] S5. Open the gas supply switch and the exhaust switch in the possible hydrogen leakage areas, introduce a protective gas that does not react with hydrogen, and at the same time discharge the leaked gas containing hydrogen, and keep the air pressure and flow rate of the introduction and discharge consistent. For the area blocks where the hydrogen detection sensor on the exhaust path no longer detects hydrogen leakage, close the exhaust switch, the gas supply switch, and the connecting valve in sequence, and combine the sorting labels arranged in S3 to narrow the source position of the hydrogen leakage area blocks to less than three area blocks.

[0022] S6. For the area blocks whose sources are narrowed in step S5, close the connecting valves, introduce a protective gas to independently displace the hydrogen-containing gas in the area blocks, and then close the corresponding gas supply switch and exhaust switch. Through the data changes of the hydrogen detection sensor and the displacement sensor, lock the area blocks where the hydrogen leakage source is located.

[0023] The hydrogen leakage detection system of the hydrogen filling machine of the present invention uses a partition component to divide the internal area of the hydrogen filling machine into blocks, and sets identification holes, connecting holes, ventilation holes, and exhaust holes on the partition. When the connecting valves, gas supply switches, and exhaust switches are closed, the area blocks can independently form a sealed section, quickly narrowing the hydrogen leakage identification range, with higher accuracy in detecting the leakage position. At the same time, it avoids the diffusion of leaked hydrogen and affects the operation safety of equipment in other area blocks. The displacement sensor installed on the identification hole is used to detect the vibration condition when the diaphragm senses the air pressure change to judge the air pressure and air pressure change in the area block. The hydrogen detection sensor is used to detect whether there is hydrogen leakage in the area block. For the leaked hydrogen, the stable gas system can also ensure the stability of the environment in the area block, discharge the hydrogen for absorption treatment, reduce the corrosion damage to the set components, and analyze and judge through the remote control terminal to lock the hydrogen leakage position, realizing the online remote monitoring of hydrogen leakage in the hydrogen filling machine and improving the safety of hydrogen leakage detection.

[0024] In another technical solution, as Figure 1 shown, a groove for placing the hydrogen filling gun is recessed on one side of the outer shell of the hydrogen filling machine. At the place where the hydrogen filling gun is placed in the groove, a mounting groove is provided on the outside of the hydrogen filling machine on the outside of the groove. The mounting groove is used for sealing and installing a detection isolation cover. The detection isolation cover has a transparent window, and a hydrogen adsorption layer is provided on the top of the detection cover, and a hydrogen-sensitive color-changing material layer is provided on the outside of the adsorption layer. Whether there is hydrogen leakage at the hydrogen filling gun is identified by observing the color change of the hydrogen-sensitive color-changing material layer.

[0025] For the hydrogen leakage detection of the hydrogen filling gun part, a detection isolation cover with a hydrogen-sensitive color-changing material layer is buckled inside. By identifying the color change of the hydrogen-sensitive color-changing material layer, it is determined whether there is hydrogen leakage. The sizes of the installation groove and the isolation cover are set according to the size of the groove and the hydrogen filling gun to separate a suitable space, so as to judge whether there is hydrogen leakage faster and more accurately.

[0026] In another technical solution, as Figure 1 shown, a color recognition sensor module is arranged on the detection isolation cover facing the hydrogen-sensitive color-changing material layer for identifying color changes. The color recognition sensor module is communicatively connected to the remote control terminal, automatically recognizes by using the color recognition sensor module, and transmits the recognition result to the remote control terminal to improve the recognition accuracy and efficiency.

[0027] The present invention also provides a method for detecting hydrogen leakage of a hydrogen filling machine. Combining Figure 1 shown, it includes the following steps: S1. Divide the internal structure of the hydrogen filling machine into regional blocks, detachably set partition plates on the boundary surfaces of the regional blocks, set sealing rings to sleeve when the partition plates pass through the internal structure of the hydrogen filling machine, bond displacement sensors on the diaphragms, fix hydrogen detection sensors on the bottom surfaces of the partition plates at the top of each regional block, connect the ventilation holes of each regional block to the gas transmission pipe, connect the exhaust holes to the exhaust pipe, connect the exhaust pipe to the external hydrogen treatment equipment, and connect the outside of the gas transmission pipe to the protective gas pumping equipment; S2. When the hydrogen filling machine is working, the communication valve is first in the open state, the gas transmission switch and the exhaust switch are closed, the internal spaces of the regional blocks are communicated through the communication holes, receive the real-time detection data of the displacement sensors and the hydrogen detection sensors through the remote control terminal, construct a corresponding three-dimensional structure model for the positions of all regional blocks corresponding in the hydrogen filling machine, and mark the displacement change law of the displacement sensors under normal operation of the hydrogen filling machine; S3. When the hydrogen detection sensor detects leaked hydrogen, at the same time, observe and analyze the displacement data of each displacement sensor, compare with the displacement change law under normal operation, mark on the three-dimensional structure model accordingly, and sort and number according to the magnitude of the data change of the displacement sensors and the hydrogen detection sensors; S4. Close all the corresponding communication valves on the regional blocks where the hydrogen detection sensor does not detect hydrogen leakage to form an independent space, and mark the remaining regional blocks as possible hydrogen leakage areas; S5. Open the gas transmission switch and exhaust switch in the possible hydrogen leakage area, introduce the protective gas, and at the same time discharge the leaked gas containing hydrogen, and keep the air pressure and flow rate of the introduction and discharge consistent. For the area block where no hydrogen leakage is detected by the hydrogen detection sensor on the exhaust path, close the exhaust switch, ventilation switch, and connection valve in sequence. Combining with the sorting label arranged in S3, narrow down the source position of the hydrogen leakage area block to less than three area blocks. S6. For the area block whose source is narrowed down in step S5, close the connection valve, introduce the protective gas to independently displace the hydrogen-containing gas in the area block, and then close the corresponding gas transmission switch and exhaust switch. Through the data changes of the hydrogen detection sensor and displacement sensor, lock the area block where the hydrogen leakage source is located.

[0028] The detection method for hydrogen leakage of the hydrogenation machine of the present invention uses a partition component to divide the internal area of the hydrogenation machine into blocks. Identification holes, communication holes, ventilation holes, and exhaust holes are arranged on the partition. The communication state between adjacent area blocks can be controlled and selected through the connection valve, the state of introducing the protective gas can be controlled and selected through the gas transmission switch, and the state of balancing the air pressure and treating the hydrogen-containing gas can be controlled and selected through the exhaust switch. The air pressure change in the area block is indirectly detected according to the displacement sensor installed on the identification hole, and the hydrogen detection sensor is used to detect whether hydrogen leakage occurs in the area block and the hydrogen concentration. The hydrogen leakage source and diffusion path can be located and marked for analysis. When the connection valve, gas transmission switch, and exhaust switch are closed, the area block can independently form a sealed section for secondary detection, quickly narrowing down the hydrogen leakage identification range, and the detection accuracy of the leakage position is higher. For the leaked hydrogen, the stable gas system can also ensure the stability of the environment in the area block, discharge the hydrogen for absorption treatment, reduce the corrosion damage to the installed components, and use the remote control terminal to realize the online remote monitoring of the hydrogen leakage of the hydrogenation machine, realizing the automation and intelligence of the hydrogen leakage detection, and significantly improving the safety of the hydrogen leakage detection.

[0029] In another technical solution, when dividing the area block, a section of continuous pipeline in the hydrogenation machine is divided into one area block. For example, the entire hydrogenation hose is divided into one of the area blocks.

[0030] In another technical solution, in step S5, the sorting method is as follows: Perform the first weight parameter marking order in the time sequence when each hydrogen detection sensor detects hydrogen leakage in the corresponding area block, use the change amplitude of the displacement sensor as the second weight parameter marking order, and use the size of the concentration detection data obtained by the hydrogen detection sensor as the third weight parameter marking order. According to the three weight parameter orders, analyze the leakage source and diffusion path of the hydrogen leakage, and screen and narrow down the source position of the hydrogen leakage area block.

[0031] If within the error time range, hydrogen detection sensors at multiple locations detect leaking hydrogen almost simultaneously, and the changes in the detection signals of the sensors in the adjacent area blocks are observed, then if the detected hydrogen quantity in the surrounding adjacent area blocks is small and the detection result of the displacement sensor is small, the possibility of this area block being a diffusion area is greater. If the hydrogen quantity and displacement change in the surrounding adjacent area blocks are both ranked among the top, the possibility of it being the source is greater. Close the corresponding connecting valve and replace the internal atmosphere. During the replacement process, if the hydrogen concentration continuously detected by the hydrogen detection sensor does not decrease, the possibility of this being the source further increases. Close the gas supply switch and the exhaust switch to form an independent area block. If the hydrogen concentration continuously detected by the hydrogen detection sensor increases, then determine this area block as the hydrogen leakage source area.

[0032] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details and the illustrated and described examples here.

Claims

1. A detection system for hydrogen leakage of a hydrogen refueling machine, characterized in that, Including: A partition component disposed inside the hydrogen refueling machine housing to divide the internal structure of the hydrogen refueling machine into multiple regional blocks. A sealing ring is sleeved on the partition when passing through the internal structure of the hydrogen refueling machine. Identification air holes, communication holes, ventilation holes, and exhaust holes are respectively and penetratingly formed on the partitions between adjacent regional blocks; A gas stabilizing system including a diaphragm covering the identification air hole and a communication valve sealingly disposed on the communication hole. Each ventilation hole is respectively connected to a gas transmission pipe through a branch pipe and a gas transmission switch is disposed on the ventilation hole. Each exhaust hole is respectively connected to an exhaust pipe through a branch pipe and an exhaust switch is disposed. The exhaust pipe is connected to an external hydrogen treatment device, and the outside of the gas transmission pipe is connected to a protective gas pumping device; A module system including a displacement sensor, a hydrogen detection sensor, and a remote control terminal. The displacement sensor is adhered to the diaphragm for detecting the vibration condition when the diaphragm senses a change in air pressure. The bottom surface of the partition at the top of each regional block is respectively fixed with a hydrogen detection sensor. Each displacement sensor, communication valve, gas transmission switch, exhaust switch, and hydrogen detection sensor are respectively connected to the remote control terminal to control the operation of the communication valve, gas transmission switch, and exhaust switch and obtain the detection data of the displacement sensor and hydrogen detection sensor.

2. The hydrogen leakage detection system of the hydrogen refueling machine according to claim 1, characterized in that, A groove for placing a hydrogen refueling gun is recessed on one side of the outer shell of the hydrogen refueling machine. At the place where the hydrogen refueling gun is placed in the groove, an installation groove is provided on the outside of the hydrogen refueling machine on the outer side of the groove. The installation groove is used for sealing and installing a detection isolation cover. The detection isolation cover has a transparent window. A hydrogen adsorption layer is provided on the top of the detection cover, and a hydrogen-sensitive color-changing material layer is provided on the outside of the adsorption layer. Whether there is hydrogen leakage at the hydrogen refueling gun is identified by observing the color change of the hydrogen-sensitive color-changing material layer.

3. The hydrogen leakage detection system of the hydrogen filling machine according to claim 2, wherein A color recognition sensor module is disposed on the detection isolation cover facing the hydrogen-sensitive color-changing material layer for recognizing color changes. The color recognition sensor module is communicatively connected to the remote control terminal.

4. The hydrogen leakage detection method of the hydrogen filling machine according to claim 1, characterized in that, Including the following steps: S1. Divide the internal structure of the hydrogen refueling machine into regional blocks, detachably dispose partitions on the boundary surfaces of the regional blocks. A sealing ring is sleeved on the partition when passing through the internal structure of the hydrogen refueling machine. Adhere a displacement sensor to the diaphragm, fix a hydrogen detection sensor on the bottom surface of the partition at the top of each regional block. Connect each regional block to a gas transmission pipe at the ventilation hole and connect to an exhaust pipe at the exhaust hole. The exhaust pipe is connected to an external hydrogen treatment device, and the outside of the gas transmission pipe is connected to a protective gas pumping device; S2. When the hydrogen refueling machine is working, the communication valve is first in an open state, the gas transmission switch and the exhaust switch are closed. The internal spaces of each regional block are connected through the communication holes. Receive the real-time detection data of the displacement sensor and the hydrogen detection sensor through the remote control terminal, construct a corresponding three-dimensional structure model for the positions of all regional blocks in the hydrogen refueling machine, and mark the displacement change law of the displacement sensor under normal operation of the hydrogen refueling machine; S3. When the hydrogen detection sensor detects leaked hydrogen, at the same time, observe and analyze the displacement data of each displacement sensor, compare with the displacement change law under normal operation, mark on the three-dimensional structure model accordingly, and sort and number according to the magnitude of the data change of the displacement sensor and the hydrogen detection sensor; S4. Close all the corresponding connecting valves on the area blocks corresponding to the labels where the hydrogen detection sensor does not detect hydrogen leakage to form an independent space, and mark the remaining area blocks as possible hydrogen leakage areas; S5. Open the gas supply switch and the exhaust switch in the possible hydrogen leakage areas, introduce a protective gas, and at the same time discharge the leaked gas containing hydrogen, and keep the pressure and flow rate of the introduced gas and the discharged gas consistent. For the area blocks where the hydrogen detection sensor on the exhaust path no longer detects hydrogen leakage, close the exhaust switch, the ventilation switch, and the connecting valve in sequence. Combining with the sorting labels arranged in S3, narrow down the source location of the hydrogen leakage area blocks to less than three area blocks; S6. For the area blocks whose sources are narrowed down in step S5, close the connecting valves, introduce a protective gas to independently replace the hydrogen-containing gas in the area blocks, and then close the corresponding gas supply switch and exhaust switch. Lock the area blocks where the hydrogen leakage source is located through the data changes of the hydrogen detection sensor and the displacement sensor.

5. The method for detecting hydrogen leakage of a hydrogen refueling machine according to claim 4, characterized in that When dividing the area blocks, a section of continuous pipeline in the hydrogen filling machine is divided into one area block.

6. The method for detecting hydrogen leakage of a hydrogen filling machine according to claim 4, wherein In step S5, the sorting method is as follows: Perform the first weight parameter marking order in the time sequence of the hydrogen leakage detected in the corresponding area block by each hydrogen detection sensor, use the change amplitude of the displacement sensor as the second weight parameter marking order, and use the magnitude of the concentration detection data obtained by the hydrogen detection sensor as the third weight parameter marking order. According to the three weight parameter orders, analyze the leakage source and diffusion path of hydrogen leakage, and screen and narrow down the source location of the hydrogen leakage area blocks.

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