A hydrogen storage container leak detection device

Abstract

The application relates to the technical field of hydrogen energy equipment safety, and discloses a hydrogen storage container leakage detection device.The device comprises a sealed shell assembly, a gas detection device, an alarm and a position detection assembly.The sealed shell assembly is composed of a first bottle body sealing plate and a second bottle body sealing plate, is internally provided with a high-pressure hydrogen storage cylinder, and is separated into a top groove and a bottom groove by a sealing limiting ring.The gas detection device actively samples and detects the gas in the sealed shell through a gas suction pump and a hydrogen sensor, and triggers the alarm.The position detection assembly comprises a palladium oxide test paper attached to the inner wall of the shell and a water spraying assembly.When leakage is detected, the water spraying assembly sprays water to activate the color development reaction of the palladium oxide test paper to accurately locate the leakage point, and cooling and explosion prevention are simultaneously achieved.The application solves the problems of inaccurate leakage point positioning, low detection efficiency and lack of active safety measures in the prior art.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy equipment safety technology, and in particular to a hydrogen storage container leak detection device. Background Technology

[0002] Hydrogen, as a reducing gas and carrier gas, has been widely used in petrochemical, electronics, medical, pharmaceutical, and aerospace fields. Because hydrogen is an important source of pollution-free clean energy, countries worldwide have listed it as a key development target. However, hydrogen is colorless, odorless, flammable, and explosive, meaning that leaks in hydrogen storage containers cannot be directly detected by smell or sight, posing a safety hazard. In practical applications, hydrogen may leak from pipelines, valves, storage container openings, or even small cracks. Existing technologies struggle to accurately locate hydrogen leaks, and if the hydrogen concentration exceeds the explosive threshold, it can cause unimaginable consequences. Therefore, a device capable of detecting and locating hydrogen leaks is needed.

[0003] In the prior art, there are already some devices for detecting hydrogen leaks. For example, patent publication number CN109578809A (hereinafter referred to as "Prior Art 1") discloses a leak monitoring device for hydrogen supply systems. This device forms a sealed space outside the valve of the hydrogen storage cylinder using a gas collecting cylinder and uses a hydrogen concentration detector to measure the leakage rate to trigger a leak alarm. However, this device mainly targets leaks in the cylinder valve area and cannot accurately locate leak points such as small cracks in the cylinder body. Furthermore, it lacks active safety measures (such as cooling and explosion prevention), and may not be able to effectively prevent the risk of explosion when a leak occurs.

[0004] Patent publication number CN115979531A (hereinafter referred to as "Prior Art 2") discloses a hydrogen storage cylinder sealing detection device, which locates the leak point by the color reaction of a sealed detection space and a chemical reagent (such as litmus solution). Although this device can achieve visual location of the leak point, the detection efficiency is low. After the litmus solution changes color, it needs to be reheated by a heating ring to reset it before it can be reused, which is complicated to operate. Moreover, it cannot achieve real-time active sampling and rapid response. At the same time, this device does not pose a safety hazard when the temperature of the hydrogen leak increases.

[0005] Furthermore, patent publication number CN222392677U (hereinafter referred to as "Prior Art 3") discloses a hydrogen leakage alarm device for hydrogen storage cylinders, which comprehensively detects leaks through a sealed monitoring box and circulating airflow (gas supply pipe / exhaust pipe) and triggers an alarm. Although this device improves the detection coverage, it still cannot accurately locate the leak point and lacks chemical localization and active cooling mechanisms, resulting in limitations in leak location and explosion prevention.

[0006] In summary, existing hydrogen leak detection devices generally suffer from the following problems: First, they cannot efficiently and accurately locate leak points (especially small cracks in the cylinder); second, they lack integrated active safety functions (such as real-time cooling and rapid response); and third, the detection process is complex and inefficient, making it difficult to meet the high requirements for safety and reliability in practical applications. Summary of the Invention

[0007] The purpose of this invention is to provide a hydrogen storage container leak detection device, which mainly collects and analyzes the gas around the gas cylinder to determine whether a leak has occurred. At the same time, it performs simple protective measures after a leak is detected, so as to solve the problems of inaccurate leak point location, low detection efficiency and lack of active safety measures in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A hydrogen storage container leak detection device includes a high-pressure hydrogen storage cylinder, which consists of a cylinder body and a valve. It also includes a sealed housing assembly, a gas detection device, an alarm, and a position detection assembly. The high-pressure hydrogen storage cylinder is located inside the sealed housing assembly. The detection end of the gas detection device communicates with the interior of the sealed housing assembly. The alarm is electrically connected to the gas detection device. The position detection assembly is located inside the sealed housing assembly and between the high-pressure hydrogen storage cylinder and the sealed housing assembly. The sealed housing assembly includes a first cylinder body sealing plate and a second cylinder body sealing plate. One side of the first cylinder body sealing plate is hinged to one side of the second cylinder body sealing plate. The position detection assembly includes palladium oxide test paper and a water spray assembly. The palladium oxide test paper is attached to the inner wall of the sealed housing assembly and covers all potential leak areas. The water spray assembly sprays water onto the high-pressure hydrogen storage cylinder to activate the colorimetric reaction of the palladium oxide test paper and simultaneously achieves cooling and explosion prevention.

[0010] Specifically, the sealing housing assembly further includes a first bottle valve detection box and a second bottle valve detection box. The first bottle valve detection box is located above the first bottle body sealing plate, and the second bottle valve detection box is located above the second bottle body sealing plate. The opposite end faces of the first and second bottle body sealing plates are each provided with an inner groove for placing the bottle body. The first and second bottle valve detection boxes are used to place the bottle valve, and the detection end of the gas detection device is connected to the inner groove.

[0011] Furthermore, the upper and middle sections of the inner groove are respectively provided with sealing limiting rings. The sealing limiting ring located in the middle section of the inner groove divides the inner grooves of the first bottle body sealing plate and the second bottle body sealing plate into a top groove and a bottom groove, respectively. The sealing limiting ring located in the upper section of the inner groove separates the inner groove from the first bottle valve detection box and the second bottle valve detection box. The top groove and the bottom groove are respectively connected to the detection end of the gas detection device. A temperature sensor and a hydrogen sensor are provided at the top inside the first bottle valve detection box.

[0012] Specifically, the sealing limiting ring consists of a limiting plate, a spring, and a sealing ring. The outer side of the sealing ring is fixedly connected to the inner groove, and a shrinkage groove is provided on the inner side of the sealing ring. The limiting plate is located in the shrinkage groove, and a spring is provided between the shrinkage groove and the limiting plate.

[0013] Furthermore, the sealed housing assembly is provided with a housing drive assembly for automatically hinged and aligned the second bottle body sealing plate with the first bottle body sealing plate. The housing drive assembly includes a base, a reduction motor, a drive plate, and a rotating plate. The base is fixedly connected to the lower end of the first bottle body sealing plate. The center of the lower end of the drive plate is fixedly connected to the rotating shaft of the reduction motor. The lower end face of the rotating plate is fixedly connected to one side of the upper end face of the drive plate. The lower end of the second bottle body sealing plate is fixedly connected to the upper end face of the rotating plate.

[0014] Specifically, the gas detection device includes a gas collector and a hydrogen sensor. The gas collector is located outside the first bottle sealing plate, and a gas collection passage is provided on the side of the first bottle sealing plate. The two ends of the gas collection passage are connected to the gas collector and the inner groove of the first bottle sealing plate, respectively. A vacuum pump is provided inside the gas collector. The air inlet of the vacuum pump is located in the gas collection passage, and the air outlet of the vacuum pump is located in the gas collector. The hydrogen sensor is located in the gas collection passage and at the front end of the air inlet of the vacuum pump. At the same time, air inlet valves are provided on the top groove and bottom groove of the second bottle sealing plate. The hydrogen sensor is electrically connected to an alarm.

[0015] Specifically, the water spray assembly consists of a high-pressure nozzle, a water storage tank, an external water supply pipe, and an internal water supply pipe. The internal water supply pipe consists of two detachably connected semi-circular pipes, which are located on the inner walls of the first and second bottle sealing plates, respectively. The inlet end of the external water supply pipe is connected to the outlet end of the water pump on the water storage tank. The inlet end of the water pump is located inside the water storage tank. The external water supply pipe has two outlet ends, which are connected to the internal water supply pipes respectively. The high-pressure nozzle is arranged on the internal water supply pipe, and the spray direction of the high-pressure nozzle is designed to face the middle area between the high-pressure hydrogen storage cylinder and the palladium oxide test paper.

[0016] Furthermore, temperature sensors are installed inside both the top and bottom slots.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This invention achieves comprehensive detection, rapid alarm, precise positioning, and active safety protection for hydrogen leaks by setting up a sealed shell assembly, a gas detection device, an alarm, and a position detection assembly, wherein the position detection assembly includes palladium oxide test paper and a water spray assembly. Compared with the prior art 1, this invention can not only detect leaks in the valve area of ​​the bottle, but also cover potential leak points in the bottle body (such as small cracks), solving the problem of limited detection range in the prior art 1; compared with the prior art 2, the color reaction of the palladium oxide test paper is activated by spraying water, which is simple to operate, responds quickly, and does not require complex operations such as heating and resetting, significantly improving detection efficiency; compared with the prior art 3, the integration of chemical positioning and active cooling mechanisms overcomes the defects of the prior art 3 in lacking precise positioning and explosion-proof measures, improving safety and reliability.

[0019] (2) This invention achieves independent and synchronous monitoring of the bottle body and valve areas by setting up a first and a second bottle valve detection box and separating the detection of the bottle body and the valve. Compared with the prior art 1, this invention avoids the limitation of only detecting the valve, can efficiently identify the leakage location of the bottle body, and improves the comprehensiveness and accuracy of the detection; at the same time, the regional design reduces cross-interference and ensures the accuracy of the leakage point location. Specifically, the first and second bottle valve detection boxes respectively cover the key sealing areas at both ends of the bottle body, and collect air pressure or sound wave signals in real time through independent sensing units to achieve rapid identification and separation of the leakage source. This not only improves the detection efficiency, but also effectively reduces the false alarm rate.

[0020] (3) This invention divides the inner tank into two independent gas sampling areas, a top tank and a bottom tank, by setting sealing and limiting rings in the upper and middle sections of the inner tank. Each area is connected to a high-precision gas detection device, thereby enabling independent collection and analysis of leaked gas at different locations. Simultaneously, temperature and hydrogen sensors are rationally arranged inside the first bottle valve detection box to monitor changes in the internal environment in real time, further enhancing the system's responsiveness. Compared with the prior art 3, the regional detection structure adopted in this invention can not only more accurately identify the specific location of the leak (e.g., the upper or lower part of the bottle), but also effectively avoids the problems of missed detection or ambiguous positioning caused by dilution and mixing of local leaks due to circulating airflow in the prior art. This improves the resolution and accuracy of hydrogen leak location judgment, enhancing the reliability and practicality of the overall detection system.

[0021] (4) The sealing limiting ring in this invention consists of a limiting plate, a spring, and a sealing ring. The spring adapts to high-pressure hydrogen storage cylinders of different diameters through its extension and contraction, ensuring sealing and tightness. Compared with prior art 2 and 3, this invention improves the compatibility and sealing reliability between the sealing shell and the gas cylinder, reduces the risk of leakage due to differences in gas cylinder size, and enhances the stability and applicability of the detection.

[0022] (5) By setting up a housing drive assembly, the present invention achieves automatic hinged alignment between the second bottle body sealing plate and the first bottle body sealing plate. Compared with the prior art 2, the present invention realizes automated control of the packaging process, improves operating efficiency and sealing consistency, avoids the problems of errors and low efficiency caused by manual operation, and is especially suitable for frequent testing scenarios.

[0023] (6) The present invention achieves real-time gas monitoring through active gas sampling. Compared with the prior art 3, the active sampling mechanism (gas pump and gas collection path) of the present invention ensures the comprehensiveness and timeliness of gas detection, can quickly capture hydrogen generated by small leaks, and improves detection sensitivity and response speed. At the same time, the hydrogen sensor is located at the front end of the gas collection path, avoiding airflow interference and ensuring the accuracy of detection data.

[0024] (7) In this invention, the water spray assembly consists of a high-pressure nozzle, a water tank, an external water supply pipe, and an internal water supply pipe. The internal water supply pipe is semi-circular, and the high-pressure nozzle faces the middle area of ​​the high-pressure hydrogen storage cylinder and the palladium oxide test paper, ensuring that the water mist covers the area evenly to activate the color reaction and achieve cooling. Compared with the prior art 2, this invention not only quickly activates the color reaction of the palladium oxide test paper by spraying water (without complicated reset operation), but also achieves active cooling and explosion prevention at the same time, solving the problems of lack of safety measures and cumbersome operation in the prior art 2; the water spray design optimizes the water mist distribution and improves the clarity and reliability of leak point location.

[0025] (8) The present invention is equipped with temperature sensors inside both the top tank and the bottom tank to monitor the temperature changes in the tank in real time. Compared with the prior art 1 and 3, the present invention can provide timely warning when the temperature rises due to hydrogen leakage, and achieve rapid cooling by combining with the water spray assembly, which further enhances the active safety performance of the system and prevents the risk of explosion. Attached Figure Description

[0026] Figure 1 This is a front view of the structure in its initial state in this invention;

[0027] Figure 2 This is a schematic diagram of the structure in the open state of this invention;

[0028] Figure 3 This is a schematic diagram of the high-pressure gas storage cylinder in this invention;

[0029] Figure 4 In this invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0030] Figure 5 In this invention Figure 1 Enlarged schematic diagram of the structure at point B in the diagram;

[0031] Figure 6 This is a top view of the housing drive assembly in this invention;

[0032] Figure 7 This is a schematic diagram of the sealing and limiting ring structure in this invention.

[0033] The names corresponding to the reference numerals in the attached figures are as follows:

[0034] 1. First bottle body sealing plate, 101 top groove, 102 bottom groove, 103 palladium oxide test paper, 2. Second bottle body sealing plate, 3. Drive base, 301 geared motor, 302 drive plate, 303 rotating plate, 4. First bottle valve detection box, 5. Second bottle valve detection box, 6. Sealing limit ring, 601 limit plate, 602 shrink groove, 603 spring, 604 sealing ring, 7. High-pressure nozzle, 701 water tank, 702 water pump, 703 external water supply pipe, 704 internal water supply pipe, 8. Temperature sensor, 9. Gas collector, 901 vacuum pump, 902 air pump exhaust port, 903 air pump inlet, 904 gas collection passage, 905 hydrogen sensor, 10. Inlet valve, 11. Alarm, 12. High-pressure hydrogen storage cylinder, 121 cylinder body, 122 cylinder valve. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0036] Example

[0037] like Figure 1 - Figure 7As shown, this embodiment provides a hydrogen storage container leak detection device, including a sealed housing assembly for housing a high-pressure hydrogen storage cylinder, a gas detection device for detecting the gas inside the sealed housing assembly, an alarm 11 that issues a warning when a hydrogen leak is detected, and a location detection assembly for determining the specific location of the leak. The sealed housing assembly includes a first cylinder sealing plate 1, a second cylinder sealing plate 2, a first cylinder valve detection box 4, and a second cylinder valve detection box 5. The first cylinder valve detection box 4 is fixedly located above the first cylinder sealing plate 1, and the second cylinder valve detection box 5 is correspondingly located above the second cylinder sealing plate 2. One side of the first cylinder sealing plate 1 and one side of the second cylinder sealing plate 2 are connected by a hinge structure, allowing them to open and close relative to each other. On the opposite end faces of the first cylinder sealing plate 1 and the second cylinder sealing plate 2, respectively, are internal groove structures for accommodating the cylinder body 121 of the high-pressure hydrogen storage cylinder. When the first bottle body sealing plate 1 and the second bottle body sealing plate 2 are closed, the first bottle valve detection box 4 and the second bottle valve detection box 5 at their tops also mate and merge, forming a relatively sealed detection space that effectively isolates external environmental interference. The bottom of the inner groove of the sealing housing assembly is designed with a slight inclination surface, which facilitates the natural flow of water after spraying to a lower position and discharge through the gaps in the sealing housing or the preset drainage holes, preventing water accumulation from affecting the sensor and detection accuracy.

[0038] In this embodiment, a base 3 is provided below the sealing shell assembly, and a shell driving assembly for driving the second bottle sealing plate is integrated on the base 3. This driving assembly mainly includes a geared motor 301, a drive plate 302, and a rotating plate 303. The base 3 is fixedly connected to the lower end of the first bottle sealing plate 1, remaining stationary. The lower center of the drive plate 302 is fixed to the output shaft of the geared motor 301, and is directly driven to rotate by the motor. The lower end face of the rotating plate 303 is fixedly connected to one side of the upper end face of the drive plate 302, and the lower end of the second bottle sealing plate 2 is fixed to the upper end face of the rotating plate 303. Driven by the geared motor 301, the rotational movement of the drive plate 302 drives the rotating plate 303, thereby causing the second bottle sealing plate 2 to rotate around the hinge axis, realizing the opening and closing action with the first bottle sealing plate 1. During operation, the high-pressure hydrogen storage cylinder 12 is first placed in the inner groove of the fixed first cylinder sealing plate 1. Then, the drive assembly is activated to smoothly close the second cylinder sealing plate 2, completing the sealing of the cylinder. Compared with the prior art 2, this drive assembly realizes automated control of the sealing process, significantly improving operating efficiency and the consistency and reliability of the sealing structure.

[0039] To further improve the accuracy of hydrogen leak detection, sealing and limiting rings 6 are installed at the upper and middle sections of the inner grooves of the second bottle body sealing plate 2 and the first bottle body sealing plate 1, respectively. The sealing and limiting ring 6 located in the middle section of the inner groove separates the inner grooves of the first bottle body sealing plate 1 and the second bottle body sealing plate 2 into independent top grooves 101 and bottom grooves 102. The sealing and limiting ring 6 located in the upper section of the inner groove is used to separate the bottle body area from the bottle valve detection box space. The top groove 101 and the bottom groove 102 are connected to the gas detection device through independent pipelines to achieve regional sampling. A temperature sensor 8 and a hydrogen sensor 905 are also installed at the top of the inner cavity of the first bottle valve detection box 4 to monitor the hydrogen concentration and ambient temperature in the bottle valve area. The sealing and limiting ring 6 is specifically composed of a limiting plate 601, a spring 603, and a sealing ring 604. The outer side of the sealing ring 604 is fixed to the inner wall of the groove, and the inner side is designed with a shrinkage groove 602. The limiting plate 601 is placed in the shrinkage groove 602, and a spring 603 is set between the shrinkage groove 602 and the limiting plate 601 to form an elastic support structure. This design allows the sealing limiting ring 6 to adapt to high-pressure hydrogen storage cylinders 12 of different diameters. The position of the limiting plate is automatically adjusted by the extension and contraction of the spring to achieve the fastening and sealing of the cylinder body. This regional detection structure effectively overcomes the shortcomings of the prior art 1 and prior art 3, which have limited detection range and difficulty in locating leakage areas, and realizes independent and synchronous monitoring of the cylinder body and cylinder valve area.

[0040] The gas detection device mainly consists of a gas collector 9 and a hydrogen sensor 905. The gas collector 9 is installed on the outside of the first bottle sealing plate 1, and a gas collection passage 904 is machined inside the side of the first bottle sealing plate 1. One end of the gas collection passage 904 is connected to the gas collector 9, and the other end leads to the inner groove space of the first bottle sealing plate 1. A vacuum pump 901 is installed inside the gas collector 9. The air inlet 903 of the vacuum pump 901 is located inside the gas collection passage 904, and the air outlet 902 is located inside the gas collector 9. The hydrogen sensor 905 is arranged inside the gas collection passage 904 and at the front end of the air inlet 903, ensuring that hydrogen concentration detection can be completed before the gas is drawn into the pump. Inlet valves 10 are provided in the top groove 101 and bottom groove 102 areas of the second bottle sealing plate 2 to control the airflow during detection. The hydrogen sensor 905 is electrically connected to the alarm 11. When the hydrogen concentration exceeds the safety threshold, the alarm 11 is immediately triggered to issue an audible and visual alarm, prompting the operator to take timely action. This detection mechanism based on active gas extraction and sampling can achieve real-time circulation monitoring of the gas in the sealed cavity, ensuring comprehensive and timely detection, and its performance is superior to the passive gas circulation detection method used in the existing technology 4.

[0041] Upon detection of hydrogen leakage, a location detection component is provided in this embodiment to further determine whether the leak is located at the valve or the bottle body. This component consists of a water spray assembly and palladium oxide test paper 103. The palladium oxide test paper 103 is attached to the inner walls of the top groove 101 and the bottom groove 102, covering all potential leakage areas (including the bottle body surface and around gaps) to ensure detection without blind spots. It is made of a material with high water resistance and chemical stability to ensure that it can maintain its performance after multiple water sprays, and the test paper can be replaced periodically to maintain detection accuracy. A water spray assembly is arranged at the top of the interior of the top groove 101 and the bottom groove 102. Each water spray assembly includes a high-pressure nozzle 7, a water storage tank 701, an external water supply pipe 703, and an internal water supply pipe 704. The internal water supply pipe 704 is designed as two detachably connected semi-circular pipe sections, which are respectively embedded in the inner walls of the first bottle body sealing plate 1 and the second bottle body sealing plate 2. The inlet of the external water supply pipe 703 is connected to the outlet of the water pump 702 mounted on the water storage tank 701, with the inlet of the water pump 702 extending below the liquid level in the water storage tank 701. The external water supply pipe 703 has two outlets, which are connected to two sections of the internal water supply pipe 704 respectively. High-pressure nozzles 7 are spaced along the internal water supply pipes 704 to ensure that the water spray covers the entire inner tank area. The spray direction of the high-pressure nozzles is designed towards the middle area of ​​the high-pressure hydrogen storage cylinder and the palladium oxide test paper to ensure that the water mist can evenly cover the surface of the test paper. At the same time, the internal water supply pipe is equipped with a control valve to adjust the water volume and spraying time to avoid excessive water accumulation. In this embodiment, the high-pressure nozzles use atomizing nozzles to generate fine water mist that evenly covers the surface of the palladium oxide test paper, reducing water accumulation. After spraying water, the control system delays gas detection for 5-10 seconds to allow water mist to settle and hydrogen concentration to stabilize, ensuring detection accuracy. On the one hand, palladium oxide test paper requires a humid environment to produce a noticeable color reaction in detecting hydrogen. Therefore, after confirming a hydrogen leak, water is sprayed onto the surface of the gas cylinder by activating the high-pressure nozzle 7. During spraying, the water mist diffuses onto the surface of the palladium oxide test paper 103, ensuring uniform wetting of the paper. If a leak occurs, the escaping hydrogen immediately reacts with the moistened test paper, causing a significant color change in that area compared to the surrounding region, thus pinpointing the leak location. On the other hand, if the leaked hydrogen is at a high temperature, posing a risk of combustion or explosion, the water spray can simultaneously cool the gas, enhancing system safety.

[0042] To monitor temperature changes within the tanks in real time, temperature sensors 8 are installed in both the top tank 101 and the bottom tank 102. The gas detection device and the position detection component work in coordination through a control system. When the hydrogen sensor detects that the hydrogen concentration exceeds the safety threshold, the control system automatically activates the water spray component and alarm, prioritizing water spraying on the leak area to ensure rapid activation of the palladium oxide test paper's colorimetric reaction and cooling for explosion prevention. This position detection component combines chemical colorimetric location with active water spray cooling, solving the problems of complex location operations and lack of active explosion prevention measures in existing technologies, thus achieving rapid, accurate, and safe leak point location and emergency response.

[0043] In this embodiment, the operator first places the high-pressure hydrogen storage cylinder 12 into the inner groove of the fixed first cylinder body sealing plate 1, and then drives the second cylinder body sealing plate 2 to rotate by controlling the reduction motor 301, so that it closes with the first cylinder body sealing plate 1. At this time, the cylinder body 121 of the high-pressure hydrogen storage cylinder 12 is covered in the top groove 101 and the bottom groove 102, and the cylinder valve is located in the sealed space formed by the first cylinder valve detection box 4 and the second cylinder valve detection box 5. Leakage monitoring in the cylinder valve area is handled by the temperature sensor 8 and the hydrogen sensor 905 integrated in the first cylinder valve detection box 4; the monitoring of the cylinder body area is performed by the gas detection device: the pump 901 is started, and the inlet valve 10 of the corresponding area is opened at the same time, so that the gas flows from the inner groove through the gas collection passage 904 to the gas collector 9. During this process, the hydrogen sensor 905 detects the airflow in real time. Once hydrogen leakage is detected at the top or bottom of the cylinder body, the system immediately triggers the water spray assembly in the corresponding area, and the high-pressure nozzle 7 sprays water to wet the palladium oxide test paper 103. The water spray design ensures that the water mist evenly covers the palladium oxide test paper, promoting the colorimetric reaction. Newly escaped hydrogen at the leak point first contacts the nearby moistened test paper, causing a significant color change. Because previously leaked and diffused hydrogen has been removed by the extraction system, newly leaked hydrogen can be quickly located. Despite the diffusivity of hydrogen, the leak point can still be accurately identified. After spraying, accumulated water naturally drains through the inclined surface at the bottom of the inner tank, avoiding interference with system operation.

[0044] The above embodiments are merely preferred embodiments of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but which still solve the same technical problem as the present invention, should be included within the protection scope of the present invention.

Claims

1. A hydrogen storage container leakage detection device, comprising a high-pressure hydrogen storage cylinder (12), wherein the high-pressure hydrogen storage cylinder (12) is composed of a cylinder body (121) and a cylinder valve (122), characterized in that: It also includes a sealed housing assembly, a gas detection device, an alarm (11), and a position detection assembly; the high-pressure hydrogen storage cylinder (12) is located inside the sealed housing assembly, the detection end of the gas detection device is connected to the inside of the sealed housing assembly, the alarm (11) is electrically connected to the gas detection device, and the position detection assembly is located inside the sealed housing assembly and between the high-pressure hydrogen storage cylinder (12) and the sealed housing assembly; the sealed housing assembly includes a first cylinder sealing plate (1) and a second cylinder sealing plate (2); one side of the first cylinder sealing plate (1) is hinged to one side of the second cylinder sealing plate (2); the position detection assembly includes palladium oxide test paper (103) and a water spray assembly; the palladium oxide test paper (103) is attached to the inner wall of the sealed housing assembly and covers all potential leakage areas; the water spray assembly is used to spray water onto the high-pressure hydrogen storage cylinder (12) to activate the color reaction of the palladium oxide test paper (103) and simultaneously achieve cooling and explosion prevention; The sealing housing assembly also includes a first bottle valve detection box (4) and a second bottle valve detection box (5). The first bottle valve detection box (4) is located above the first bottle body sealing plate (1), and the second bottle valve detection box (5) is located above the second bottle body sealing plate (2). The first bottle body sealing plate (1) and the second bottle body sealing plate (2) are each provided with an inner groove for placing the bottle body (121) on their opposite end faces. The first bottle valve detection box (4) and the second bottle valve detection box (5) are used to place the bottle valve (122). The detection end of the gas detection device is connected to the inner groove. The upper and middle sections of the inner groove are respectively provided with sealing limiting rings (6). The sealing limiting ring (6) located in the middle section of the inner groove divides the inner grooves of the first bottle body sealing plate (1) and the second bottle body sealing plate (2) into a top groove (101) and a bottom groove (102). The sealing limiting ring (6) located in the upper section of the inner groove separates the inner groove from the first bottle valve detection box (4) and the second bottle valve detection box (5). The top groove (101) and the bottom groove (102) are respectively connected to the detection end of the gas detection device. The top of the first bottle valve detection box (4) is provided with a temperature sensor (8) and a hydrogen sensor (905).

2. The hydrogen storage container leakage detection device according to claim 1, characterized in that: The sealing limiting ring (6) is composed of a limiting plate (601), a spring (603) and a sealing ring (604). The outer side of the sealing ring (604) is fixedly connected to the inner groove. A shrinkage groove (602) is provided on the inner side of the sealing ring (604). The limiting plate (601) is located in the shrinkage groove (602). A spring (603) is provided between the shrinkage groove (602) and the limiting plate (601).

3. The hydrogen storage container leakage detection device according to claim 2, characterized in that: The sealed housing assembly is provided with a housing drive assembly for automatically hinged and aligned the second bottle body sealing plate (2) with the first bottle body sealing plate (1). The housing drive assembly includes a base (3), a reduction motor (301), a drive plate (302), and a rotating plate (303). The base (3) is fixedly connected to the lower end of the first bottle body sealing plate (1). The lower center of the drive plate (302) is fixedly connected to the rotating shaft of the reduction motor (301). The lower end face of the rotating plate (303) is fixedly connected to one side of the upper end face of the drive plate (302). The lower end of the second bottle body sealing plate (2) is fixedly connected to the upper end face of the rotating plate (303).

4. The hydrogen storage container leakage detection device according to claim 3, characterized in that: The gas detection device includes a gas collector (9) and a hydrogen sensor (905). The gas collector (9) is located outside the first bottle sealing plate (1), and a gas collection passage (904) is provided on the side of the first bottle sealing plate (1). The two ends of the gas collection passage (904) are respectively connected to the gas collector (9) and the inner groove of the first bottle sealing plate (1). A vacuum pump (901) is provided inside the gas collector (9). The air pump (901) pumps air into the gas collection passage. The gas inlet (903) is located in the gas collection passage (904), the gas pump exhaust port (902) of the gas pump (901) is located in the gas collector (9), the hydrogen sensor (905) is located in the gas collection passage (904) and at the front end of the gas pump inlet (903), and at the same time, the top groove (101) and bottom groove (102) of the second bottle body sealing plate (2) are both provided with air inlet valves (10), and the hydrogen sensor (905) is electrically connected to the alarm (11).

5. A hydrogen storage container leakage detection device according to claim 4, characterized in that: The water spray assembly consists of a high-pressure nozzle (7), a water storage tank (701), an external water supply pipe (703), and an internal water supply pipe (704). The internal water supply pipe (704) consists of two detachably connected semi-circular pipes. The two internal water supply pipes (704) are located on the inner walls of the first bottle sealing plate (1) and the second bottle sealing plate (2), respectively. The inlet end of the external water supply pipe (703) is connected to the outlet end of the water pump (702) on the water storage tank (701). The inlet end of the water pump (702) is located inside the water storage tank (701). The external water supply pipe (703) has two outlet ends, which are connected to the internal water supply pipe (704), respectively. The high-pressure nozzle (7) is arranged on the internal water supply pipe (704), and the spray direction of the high-pressure nozzle is towards the middle area of ​​the high-pressure hydrogen storage cylinder and the palladium oxide test paper.

6. A hydrogen storage container leakage detection device according to claim 5, characterized in that: Temperature sensors (8) are installed inside both the top groove (101) and the bottom groove (102).

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