A device having hydrogen refueling vent detection functionality and methods of use thereof

Abstract

A device with hydrogen refueling leak detection function includes a connecting mounting plate with a hole in the middle. A detection gas box is installed in the hole, and a sealing top cover is provided at the top of the detection gas box. A spring is sleeved on the upper outer wall of the detection gas box located on the connecting mounting plate. The top of the spring is fixedly connected to the lower end of the sealing top cover. A first pressure gauge and a gas supply connector are provided at the top of the sealing top cover. A leak valve mounting block is provided at the top of the detection gas box inside the sealing top cover. A leak valve sealing ring is fixedly installed on the upper surface of the leak valve mounting block. A leak valve fixing groove is opened on the inner surface of the leak valve mounting block for installing the leak valve. A gas guide pipe is fixedly installed at the top of the detection gas box, a second pressure gauge is installed at the bottom, and an exhaust valve is installed on the side. This invention solves the problems of inconvenient installation and fixing of existing detection devices, difficulty in reading detection results, and lack of early warning. It realizes the multi-functional integration of detection, exhaust pressure relief, and alarm, and is safe, reliable, and highly practical.

Description

Technical Field

[0001] This invention relates to the field of hydrogen refueling technology, and in particular to a device with hydrogen refueling leakage detection function and its usage method. Background Technology

[0002] Hydrogen fuel cell vehicles require a hydrogen refueling device for refueling. This device typically consists of two connectors, one on the refueling machine and the other on the vehicle. When refueling is needed, the two connectors are airtightly connected, and the refueling machine fills the hydrogen storage system of the fuel cell. Because the hydrogen is compressed during refueling, the two connectors must maintain an airtight connection. Therefore, existing hydrogen refueling devices often use threaded connections, which makes connecting the connectors difficult. Furthermore, existing devices cannot detect hydrogen leaks during refueling, failing to promptly identify leaks. Undetected leaks can lead to wasted hydrogen and even potential explosions. Therefore, a device with hydrogen refueling leak detection capabilities is needed to reduce the difficulty of connecting the connectors and improve the safety of hydrogen refueling.

[0003] For example, CN116659757A discloses a leak detection device for a hydrogen dispenser, which is applied in the technical field of hydrogen dispensers. It includes a connecting pipe connected to a hydrogen dispenser, a gas filling pipe connected to the connecting pipe, and a detection mechanism at the connection between the connecting pipe and the gas filling pipe. The detection mechanism covers the connection between the connecting pipe and the gas filling pipe. The detection mechanism includes a sealed box, which is fixed to the hydrogen dispenser. Both the connecting pipe and the gas filling pipe extend into the sealed box. The sealed box is equipped with a detection component, which rises and falls with the change of gas volume inside the sealed box. The advantages of this application are: both the connecting pipe and the filling pipe are inserted into the sealed box for connection. Once a hydrogen leak occurs, the gas pressure inside the sealed box will increase, thereby driving the detection component to move. The operator can promptly detect the hydrogen leak by observing the position of the detection component. However, this device, by fitting the connecting pipe and the filling pipe inside the detection box, is inconvenient to install and disassemble. Furthermore, leaks are difficult to detect during hydrogen filling. There are no measures to handle excessive leakage pressure or alarm measures, making it impossible to truly achieve timely early warning, protection, and handling of hydrogen leaks.

[0004] Therefore, it is necessary to improve the existing technology and design a leak detection device for hydrogen dispensers that is simple in structure, easy to install and disassemble, and capable of timely early warning, protection and handling of hydrogen leaks. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device and its method of use with hydrogen refueling leakage detection function, which solves the technical problems of inconvenient installation and disassembly of existing detection devices, leakage occurrence, and inability to detect hydrogen refueling process in real time. By increasing the pressure gauge value after the gas pressure value inside the device increases, the device can quickly detect leaked gas during the refueling process, release gas when the pressure exceeds the limit, and issue an early warning.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a device with hydrogen refueling leakage detection function, including a connecting mounting plate, a hole in the middle of the connecting mounting plate, a detection gas box installed in the hole, a sealing top cover provided at the top of the detection gas box, a spring sleeved on the upper outer wall of the detection gas box located on the connecting mounting plate, the top of the spring being fixedly connected to the lower end of the sealing top cover, a first pressure gauge and a gas supply connector provided at the top of the sealing top cover, a leakage valve mounting block provided at the top of the detection gas box inside the sealing top cover, a leakage valve sealing ring fixedly installed on the upper surface of the leakage valve mounting block, a leakage valve fixing groove opened on the inner surface of the leakage valve mounting block for installing the leakage valve, a gas guide pipe fixedly installed at the top of the detection gas box, a second pressure gauge installed at its bottom, and an exhaust valve installed on its side.

[0007] In a preferred embodiment, the outer wall of the top of the detection gas chamber is provided with a sealing strip, which is in close contact with the inner wall of the sealing top cover.

[0008] In a preferred embodiment, the bottom inner wall of the detection gas box is provided with a plurality of evenly distributed support blocks, and the top outer wall of the support blocks is in contact with the bottom outer wall of the sealing bottom cover.

[0009] In a preferred embodiment, the sealing top cover has a cylindrical structure and an opening at the top, through which the detection gas box is installed inside the sealing top cover.

[0010] In a preferred embodiment, the inner wall of the sealed top cover is provided with a snap-fit ​​structure for limiting the detection gas box. The snap-fit ​​structure is arranged in a ring and at least two snap-fit ​​structures are provided.

[0011] In a preferred embodiment, both the first pressure gauge and the gas supply connector are connected to the interior of the sealed top cover.

[0012] In a preferred embodiment, the second barometer has the same size as the first barometer, and the second barometer also has the same model number as the first barometer.

[0013] In a preferred embodiment, the second barometer is connected to the reading device of the first barometer.

[0014] In a preferred embodiment, the gas guide pipe is connected to the interior of the detection gas box, the upper end of the gas guide pipe is fixedly connected to the gas release valve mounting block, the gas release valve mounting block is provided with upper and lower through holes, the gas release valve is connected to the gas guide pipe through the holes on the gas release valve mounting block, and the gas release valve mounting block and the gas guide pipe are connected by a sealed connection.

[0015] In a preferred embodiment, both the second pressure gauge and the exhaust valve are connected to the interior of the detection chamber.

[0016] In a preferred embodiment, the exhaust valve is configured as a rotary switch structure, and the rotary switch structure is made of wear-resistant material. The exhaust valve also includes a sealing gasket connected to the rotary switch.

[0017] In a preferred embodiment, the exhaust valve is equipped with an alarm device.

[0018] In a preferred embodiment, both the sealed top cover and the detection air box are equipped with air pressure sensors, which are connected to the control center.

[0019] A method of using a device with hydrogen refueling leak detection function, comprising the following steps: (The method utilizes any one of the aforementioned devices with hydrogen refueling leak detection function.)

[0020] Step 1: System initialization and basic device installation;

[0021] Step 2: Install the pressure gauge, exhaust valve and air supply connector, and conduct air tightness test and performance adjustment;

[0022] Step 3: After successful commissioning, assemble with the hydrogen refueling pipeline. When adding hydrogen, simultaneously monitor the gas pressure and trigger a leak alarm.

[0023] The specific steps for installing the basic device in step 1 are as follows:

[0024] Step 1.1: After all the components of a device with hydrogen refueling leakage detection function have passed the acceptance test, first insert the detection gas box into the hole of the connecting mounting plate and fix it. Then, install the gas guide pipe on the top of the detection gas box, install the leakage valve mounting block, leakage valve sealing ring and leakage valve in sequence, and then install the spring and sealing strip in sequence on the outside of the detection gas box. The lower end of the spring is fixed to the flat surface of the connecting mounting plate.

[0025] Step 1.2: After the spring and sealing strip are installed in place and the connection is confirmed to be tight, install the sealing top cover on the upper part of the test gas box, and ensure that the sealing top cover is in close contact with the sealing strip on the outside of the test gas box. Then fix the upper end of the spring to the lower end of the sealing top cover.

[0026] The specific steps of step 2 are as follows:

[0027] Step 2.1: After confirming that all parts are connected and tightened, install the first pressure gauge and air supply connector on the top of the sealed top cover, install the second pressure gauge on the bottom of the test air box, and install the exhaust valve on the side to conduct the airtightness test and performance debugging of the device.

[0028] Step 2.2: During the airtightness test, air is injected into the sealed top cover through the air supply connector. The air forms a high pressure inside the sealed top cover. At the same time, the first pressure gauge detects the air pressure inside the sealed top cover. Then, the air passes through the vent valve installed on the vent valve mounting block and enters the air guide pipe, and then enters the interior of the test air box. The second pressure gauge detects the air pressure inside the test air box. The air permeability value of the vent valve is obtained by the increase of the air pressure value of the second pressure gauge, so as to quickly detect the air permeability of the vent valve. When the air pressure value of the test air box exceeds the set limit of the exhaust valve, the exhaust valve is activated and begins to exhaust.

[0029] Step 2.3: Inject air into the sealed top cover through the air supply connector. The air forms high pressure inside the sealed top cover. As the air passes through the vent valve installed on the vent valve mounting block and enters the air guide pipe, the sealed top cover slides outward under force. The spring installed at the lower end of the sealed top cover is stretched, the internal space of the sealed top cover expands, the air density decreases, and the air pressure of the sealed top cover drops. The gas in the detection air box flows to the sealed top cover through the vent valve. When the pressure of the entire space exceeds the set value of the exhaust valve, the exhaust valve is opened to release the gas, reducing the gas pressure of the sealed top cover and the detection air box.

[0030] The specific steps of step 3 are as follows:

[0031] Step 3.1: After the airtightness test and performance debugging of the device are qualified, install and fix the gas supply connector on the sealing cover at the connection between the connecting pipe and the gas filling pipe of the hydrogen dispenser. The gas supply connector is connected to the gas phase space inside the sealing cover. When hydrogen is added, if there is a leak of hydrogen at the connection, the leaked hydrogen enters the sealing top cover through the gas supply connector. The hydrogen forms a high pressure inside the sealing top cover. At the same time, the first pressure gauge detects the pressure inside the sealing top cover. Then the hydrogen passes through the vent valve installed on the vent valve mounting block and enters the hydrogen gas guide pipe, and then enters the interior of the test gas box. The pressure inside the test gas box is detected by the second pressure gauge. The staff can detect the hydrogen filling leak by the changes in the values ​​of the first pressure gauge and the second pressure gauge.

[0032] Step 3.2: Hydrogen enters the sealed top cover through the gas inlet connector. High pressure is formed inside the sealed top cover. Simultaneously, as the hydrogen passes through the vent valve installed on the vent valve mounting block and enters the hydrogen delivery pipe, the sealed top cover slides outward under force. The spring installed at the lower end of the sealed top cover is stretched, expanding the internal space of the sealed top cover, reducing the hydrogen density, and lowering the hydrogen pressure inside the sealed top cover. Gas in the detection gas tank flows to the sealed top cover through the vent valve. When the gas pressure in the sealed top cover and the detection gas tank exceeds the set value of the vent valve, the vent valve activates to release gas, simultaneously triggering an alarm.

[0033] The present invention provides a device and method for using a hydrogen refueling leak detection function, which has the following beneficial effects:

[0034] 1. This invention solves the technical problems of existing detection devices being inconvenient to install and disassemble, prone to leakage, and unable to detect hydrogen refueling in real time;

[0035] 2. The device of the present invention adopts an integrated design, has a simple structure, is easy to operate, and can quickly and accurately detect leakage during the hydrogen refueling process, thereby improving the safety of hydrogen refueling.

[0036] 3. The invention features dual pressure gauges on the detection gas box and the sealed top cover, which facilitates observation and provides double protection, further enhancing the reliability of the device.

[0037] 4. The dual pressure gauges of the present invention are set with the same specifications and size, so that the detection accuracy on both sides is synchronized, which further improves the accuracy of detecting leaked gas in the sealed top cover of the gas box.

[0038] 5. The gas vent valve of the detection gas box in this invention allows the gas between the sealed top cover and the detection gas box to flow between each other and achieve balance, further improving the instantaneousness and timeliness of the detection gas box in detecting leaked gas inside the sealed top cover.

[0039] 6. The exhaust valve and its structure on the detection gas box of this invention provide exhaust protection when the sealed top cover and the leaking gas in the detection gas box exceed the limit, preventing explosion and triggering an alarm. The alarm is triggered when personnel do not notice the change in the pressure gauge value in time. This double protection further improves the reliability of the device and protects the device and the filling system, thereby improving the safety of the system.

[0040] 7. The spring in this invention allows the sealing top cover to extend outward when the pressure increases, expanding the internal space of the sealing top cover, reducing the internal pressure to prevent explosion, while ensuring that the stretching space of the sealing top cover is controlled and does not exceed the sealing range, making it safe and reliable, and further improving the reliability and safety of the device.

[0041] 8. The combination of the vent valve mounting block, vent valve sealing ring, and vent valve fixing groove of the present invention enables the vent valve to be quickly positioned and fixed during the air permeability test, which facilitates the testing and use of the vent valve.

[0042] 9. The vent valve on the sealed top cover of this invention works in conjunction with the vent valve on the detection air box to improve the accuracy of the detection; this invention has a simple structure, is easy to operate, has low cost, and is easy to promote and use.

[0043] 10. This invention separates the detection gas tank from the filling system. When the filling system malfunctions, the normal use of the detection gas tank is not affected, which improves the utilization rate of the equipment and reduces maintenance costs. At the same time, the detection gas tank and the filling system are connected by a pipeline, which makes installation and disassembly convenient and facilitates the maintenance and replacement of the equipment.

[0044] 11. The present invention adopts a modular design, which allows the detection gas box and the filling system to be replaced or repaired separately, thereby improving the maintenance efficiency of the equipment. At the same time, the present invention also has good versatility and scalability, which can adapt to the detection needs of filling systems of different specifications and types, providing more convenience for practical applications. Attached Figure Description

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0046] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0048] Figure 3 This is a top view of the vent valve mounting block of the present invention;

[0049] Figure 4 This is a flowchart illustrating the process of using the method of the present invention;

[0050] In the diagram: 1. Sealed top cover; 2. Detection air box; 3. Connecting mounting plate; 4. Spring; 5. Air release valve mounting block; 6. Air release valve sealing ring; 7. Air release valve fixing groove; 8. Air guide pipe; 9. First air pressure gauge; 10. Air supply connector; 11. Second air pressure gauge; 12. Exhaust valve; 13. Sealing strip. Detailed Implementation

[0051] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments:

[0052] Example 1

[0053] like Figures 1-3As shown, a device with hydrogen refueling leakage detection function includes a connecting mounting plate 3. The connecting mounting plate 3 has a hole in the middle, and a detection gas box 2 is installed in the hole. A sealing top cover 1 is provided at the top of the detection gas box 2. A spring 4 is sleeved on the upper outer wall of the detection gas box 2 located on the connecting mounting plate 3. The top of the spring 4 is fixedly connected to the lower end of the sealing top cover 1. A first pressure gauge 9 and a gas supply connector 10 are provided at the top of the sealing top cover 1. A leakage valve mounting block 5 is provided at the top of the detection gas box 2 inside the sealing top cover 1. A leakage valve sealing ring 6 is fixedly installed on the upper surface of the leakage valve mounting block 5. A leakage valve fixing groove 7 is opened on the inner surface of the leakage valve mounting block 5 for installing the leakage valve. A gas guide pipe 8 is fixedly installed on the top of the detection gas box 2. A second pressure gauge 11 is installed at the bottom of the pipe, and an exhaust valve 12 is installed on the side.

[0054] In this embodiment, a sealing strip 13 is provided on the outer wall of the top of the detection gas box 2, and the sealing strip 13 is tightly fitted to the inner wall of the sealing top cover 1;

[0055] The bottom inner wall of the detection gas box 2 is provided with a plurality of evenly distributed support blocks, and the top outer wall of the support blocks is in contact with the bottom outer wall of the sealing bottom cover 3.

[0056] The sealing top cover 1 has a cylindrical structure and an opening at the top of the sealing top cover 1. The detection air box 2 is installed inside the sealing top cover 1 through the opening.

[0057] The inner wall of the sealing top cover 1 is provided with a snap-fit ​​structure for limiting the detection gas box 2. The snap-fit ​​structure is distributed in a ring and there are at least two snap-fit ​​structures.

[0058] The first pressure gauge 9 and the gas supply connector 10 are both connected to the interior of the sealed top cover 1;

[0059] The second barometer 11 has the same dimensions as the first barometer 9, and the second barometer 11 has the same model number as the first barometer 9;

[0060] The gas guide pipe 8 is connected to the interior of the detection gas box 2. The upper end of the gas guide pipe 8 is fixedly connected to the gas release valve mounting block 5. The gas release valve mounting block 5 is provided with upper and lower through holes. The gas release valve is connected to the gas guide pipe 8 through the hole on the gas release valve mounting block 5. The gas release valve mounting block 5 and the gas guide pipe 8 are connected by a sealed connection.

[0061] The second pressure gauge 11 and the exhaust valve 12 are both connected to the interior of the detection air box 2;

[0062] The exhaust valve 12 is configured as a rotary switch structure, which is made of wear-resistant material. The exhaust valve 12 also includes a sealing gasket connected to the rotary switch.

[0063] The exhaust valve 12 is equipped with an alarm device.

[0064] In practical use, such as Figure 4 As shown, a method for detecting gas leaks using a device with hydrogen refueling leak detection function as described in any one of the above-mentioned claims includes the following steps:

[0065] Step 1: System initialization and basic device installation;

[0066] Step 2: Install the pressure gauge, exhaust valve 12 and air supply connector 10, and conduct air tightness test and performance debugging;

[0067] Step 3: After successful commissioning, assemble with the hydrogen refueling pipeline. When adding hydrogen, simultaneously monitor the gas pressure and trigger a leak alarm.

[0068] The specific steps for installing the basic device in step 1 are as follows:

[0069] Step 1.1: After all the components of a device with hydrogen refueling leakage detection function have passed the acceptance test, first insert the detection gas box 2 into the hole of the connecting mounting plate 3 and fix it. Then, install the gas guide pipe 8 on the top of the detection gas box 2, and install the leakage valve mounting block 5, leakage valve sealing ring 6 and leakage valve in sequence. Then, install the spring 4 and sealing strip 13 in sequence on the outside of the detection gas box 2. The lower end of the spring 4 is fixed to the upper plane of the connecting mounting plate 3.

[0070] Step 1.2: After the spring 4 and sealing strip 13 are installed in place and the connection is confirmed to be tight, the sealing top cover 1 is then installed on the upper part of the detection gas box 2, and it is ensured that the sealing top cover 1 is in close contact with the sealing strip 13 on the outside of the detection gas box 2. Then, the upper end of the spring 4 is fixed to the lower end of the sealing top cover 1.

[0071] The specific steps of step 2 are as follows:

[0072] Step 2.1: After confirming that all parts are connected and tightened, install the first pressure gauge 9 and the air supply connector 10 on the top of the sealed top cover 1, install the second pressure gauge 11 on the bottom of the test air box 2, and install the exhaust valve 12 on the side to conduct the air tightness test and performance debugging of the device.

[0073] Step 2.2: During the airtightness test, air is injected into the sealed top cover 1 through the air supply connector 10. The air forms a high pressure inside the sealed top cover 1. At the same time, the first pressure gauge 9 detects the air pressure inside the sealed top cover 1. Then, the air passes through the vent valve installed on the vent valve mounting block 5 and enters the air guide pipe 8, and then enters the interior of the test air box 2. The second pressure gauge 11 detects the air pressure inside the test air box 2. The air permeability value of the vent valve is obtained by the increase of the air pressure value of the second pressure gauge 11, so as to quickly detect the air permeability of the vent valve. When the air pressure value of the test air box 2 exceeds the set limit of the exhaust valve 12, the exhaust valve 12 is activated and starts to exhaust.

[0074] Step 2.3: Inject air into the sealing top cover 1 through the air supply connector 10. The air forms a high pressure inside the sealing top cover 1. As the air passes through the vent valve installed on the vent valve mounting block 5 and enters the air guide pipe 8, the sealing top cover 1 is slid outward under force. The spring 4 installed at the lower end of the sealing top cover 1 is stretched under force, the internal space of the sealing top cover 1 expands, the air density decreases, and the air pressure of the sealing top cover 1 drops. The gas in the detection air box 2 flows to the sealing top cover 1 through the vent valve. When the pressure of the entire space exceeds the set value of the exhaust valve 12, the exhaust valve 12 is opened to exhaust the gas, reducing the gas pressure of the sealing top cover 1 and the detection air box 2.

[0075] The specific steps of step 3 are as follows:

[0076] Step 3.1: After the airtightness test and performance debugging of the device are qualified, install and fix the gas supply connector 10 on the sealing cover at the connection between the connecting pipe and the gas filling pipe of the hydrogen dispenser. The gas supply connector 10 is connected to the gas phase space inside the sealing cover. When hydrogen is added, there is a leak of hydrogen at the connection. The leaked hydrogen enters the sealing top cover 1 through the gas supply connector 10. The hydrogen forms a high pressure inside the sealing top cover 1. At the same time, the first pressure gauge 9 detects the pressure inside the sealing top cover 1. Then the hydrogen passes through the vent valve installed on the vent valve mounting block 5 and enters the hydrogen gas guide pipe 8, and then enters the interior of the detection gas box 2. The second pressure gauge 11 detects the pressure inside the detection gas box 2. The staff can detect the hydrogen filling leak by the changes in the values ​​of the first pressure gauge 9 and the second pressure gauge 11.

[0077] Step 3.2: Hydrogen enters the sealed top cover 1 through the gas inlet connector 10. The hydrogen forms a high pressure inside the sealed top cover 1. As the hydrogen passes through the vent valve installed on the vent valve mounting block 5 and enters the hydrogen gas delivery pipe 8, the sealed top cover 1 slides outward under force. The spring 4 installed at the lower end of the sealed top cover 1 is stretched by force, the internal space of the sealed top cover 1 expands, the hydrogen density decreases, and the hydrogen pressure inside the sealed top cover 1 decreases. The gas in the detection gas box 2 flows to the sealed top cover 1 through the vent valve. When the gas pressure of the sealed top cover 1 and the detection gas box 2 exceeds the set value of the exhaust valve 12, the exhaust valve 12 starts to release gas outward, and at the same time, the alarm is triggered.

[0078] Example 2

[0079] In another preferred embodiment, based on Embodiment 1 above, the second barometer 11 is connected to the reading device of the first barometer 9, such as... Figure 4 As shown, the method of using a device with hydrogen refueling leak detection function is as follows:

[0080] Step 1: Initialize the refueling system and perform basic installation of a device with hydrogen refueling leak detection function;

[0081] Step 2: Install the pressure gauge, exhaust valve 12, and air supply connector 10, and conduct an airtightness test and performance adjustment, as detailed below:

[0082] Step 2.1: After confirming that the foundation is in place, install the first pressure gauge 9 and the air supply connector 10 on the top of the sealed top cover 1, install the second pressure gauge 11 on the bottom of the test air box 2, and install the exhaust valve 12 on the side.

[0083] Step 2.2: During the airtightness test, air is injected into the sealed top cover 1 through the air supply connector 10. The air forms a high pressure inside the sealed top cover 1, and at the same time, the first pressure gauge 9 detects the air pressure inside the sealed top cover 1.

[0084] Step 2.3: Air passes through the vent valve installed on the vent valve mounting block 5 and enters the air guide pipe 8, and then enters the interior of the detection air box 2. The air pressure inside the detection air box 2 is detected by the second pressure gauge 11.

[0085] Step 2.4: By increasing the air pressure value of the second pressure gauge 11, the air permeability value of the vent valve can be obtained, thereby quickly testing the air permeability of the vent valve.

[0086] Step 2.5: When the air pressure value of the test air box 2 exceeds the set limit of the exhaust valve 12, the exhaust valve 12 is activated and the air tightness test is qualified.

[0087] Step 2.6: If the pressure in the air chamber 2 is continuously increased and the pressure value is always lower than the set limit of the exhaust valve 12, and the exhaust valve 12 does not start, then the air tightness test is unqualified. Check each component of the device and its connection parts, reassemble, and re-perform the air tightness test until the air tightness test is qualified.

[0088] Step 3: After successful commissioning, assemble with the hydrogen refueling pipeline. During hydrogen refueling, simultaneously monitor the gas pressure and trigger a leak alarm, as detailed below:

[0089] Step 3.1: After the airtightness test and performance debugging of the device are qualified, install and fix the gas supply connector 10 on the sealing cover at the connection between the connecting pipe and the gas filling pipe of the hydrogen dispenser. Connect the gas supply connector 10 to the gas phase space inside the sealing cover and add hydrogen. The first pressure gauge 9 detects the gas pressure in the sealing top cover 1 and the second pressure gauge 11 detects the gas pressure in the test gas box 2. If there is no change in the first pressure gauge 9 and the second pressure gauge 11, the hydrogen dispensing system is operating normally.

[0090] Step 3.2: If there is a hydrogen leak at the connection, the leaked hydrogen enters the sealed top cover 1 through the gas supply connector 10 connected to the sealing cover. The hydrogen forms a high pressure inside the sealed top cover 1, and the reading of the first pressure gauge 9 changes. The gas passes through the vent valve installed on the vent valve mounting block 5 and enters the hydrogen gas delivery pipe 8, and then enters the interior of the detection gas box 2. The reading of the second pressure gauge 11 changes. The staff can detect the hydrogen filling leak by observing the changes in the values ​​of the first pressure gauge 9 and the second pressure gauge 11.

[0091] Step 3.3: Hydrogen enters the sealed top cover 1 through the gas supply connector 10. The hydrogen forms a high pressure inside the sealed top cover 1. At the same time, the hydrogen enters the air guide pipe 8 through the vent valve installed on the vent valve mounting block 5. The sealed top cover 1 is slid outward under force. The spring 4 installed at the lower end of the sealed top cover 1 is stretched under force. The internal space of the sealed top cover 1 expands, the hydrogen density decreases, and the hydrogen pressure inside the sealed top cover 1 is reduced. The gas in the detection gas box 2 flows to the sealed top cover 1 through the vent valve.

[0092] Step 3.4: When the gas pressure of the sealed top cover 1 and the detection gas box 2 exceeds the set value of the exhaust valve 12, the exhaust valve 12 will start to release gas and trigger the alarm at the same time.

[0093] Example 3

[0094] In another preferred embodiment, based on the above embodiments 1 and 2, a pressure sensor is installed in both the sealing top cover 1 and the detection gas box 2. The pressure sensor is connected to the control center, which facilitates remote monitoring by staff of the working status of a device with hydrogen refueling leakage detection function installed on the hydrogen refueling system, namely the change in gas pressure in the sealing top cover 1 and the detection gas box 2, so as to detect hydrogen leakage in the hydrogen refueling system in a timely manner, shut down the system in time, and eliminate faults to ensure the safe operation of the system.

[0095] In a preferred embodiment, the outer wall of the top of the detection gas box 2 is provided with a sealing strip 13, which is in close contact with the inner wall of the sealing top cover 1. This arrangement ensures that the detection gas box 2 and the sealing top cover 1 are effectively sealed, thus guaranteeing that the device can effectively detect leaking gas.

[0096] In a preferred embodiment, the bottom inner wall of the detection gas box 2 is provided with multiple evenly distributed support blocks, and the top outer wall of the support blocks is in contact with the bottom outer wall of the sealing bottom cover 3; the above arrangement allows the sealing bottom cover 3 to be placed stably, thereby making the overall structure of the device more stable.

[0097] In a preferred embodiment, the sealing top cover 1 has a cylindrical structure and an opening at the top of the sealing top cover 1. The detection gas box 2 is installed inside the sealing top cover 1 through the opening. This arrangement facilitates the effective cooperation and sealing between the sealing top cover 1 and the detection gas box 2.

[0098] In a preferred embodiment, the inner wall of the sealing top cover 1 is provided with a snap-fit ​​structure for limiting the detection gas box 2. The snap-fit ​​structure is arranged in a ring and there are at least two snap-fit ​​structures. The above configuration improves the stability of the detection gas box 2 within the sealing top cover 1.

[0099] In the preferred embodiment, both the first pressure gauge 9 and the gas supply connector 10 are connected to the interior of the sealing top cover 1. This arrangement ensures that leaked gas can not enter the sealing top cover 1 while also promoting sealing. At the same time, the first pressure gauge 9 can effectively detect the gas pressure value in the sealing top cover 1. Furthermore, the arrangement of the first pressure gauge 9 and the gas supply connector 10 facilitates the user's observation and adjustment of the gas pressure, thereby improving the practicality of the product and the user experience. In addition, this solution is simple and reliable to implement, and easy to promote and apply.

[0100] In a preferred embodiment, the second pressure gauge 11 is the same size as the first pressure gauge 9. This arrangement ensures that the pressure value detected by the detection chamber 2 and the pressure value inside the sealed top cover 2 have the same detection conditions and accuracy, thus guaranteeing the consistency of the detection data. At the same time, the second pressure gauge 11 and the first pressure gauge 9 are of the same model, thereby ensuring that their measurement range and accuracy are the same, further improving the accuracy and reliability of the detection data. In addition, the installation position of the second pressure gauge 11 has also been carefully selected to ensure that it can accurately reflect the pressure situation inside the sealed top cover 2.

[0101] In the preferred embodiment, the second barometer 11 is connected to the reading device of the first barometer 9, enabling real-time synchronization and comparison of data. This further ensures the accuracy and reliability of the detection data and improves detection precision and efficiency. This connection method also allows users to view and compare the readings of the two barometers at any time, so as to promptly detect and handle abnormalities, thus improving the practicality and ease of use of the equipment.

[0102] In a preferred embodiment, the gas guide pipe 8 is internally connected to the test gas box 2, and the upper end of the gas guide pipe 8 is fixedly connected to the vent valve mounting block 5. The vent valve mounting block 5 is provided with upper and lower through holes, and the vent valve is connected to the gas guide pipe 8 through the holes on the vent valve mounting block 5. The vent valve mounting block 5 and the gas guide pipe 8 are connected by a sealed connection. The above configuration allows for quick positioning and fixing of the vent valve when performing permeability testing, facilitating the testing and use of the vent valve. At the same time, the configuration of the gas guide pipe 8 is conducive to the rapid accumulation and passage of gas. In addition, the smooth inner wall of the gas guide pipe 8 can reduce the resistance during gas flow and improve the testing efficiency. The sealed connection between the vent valve mounting block 5 and the gas guide pipe 8 effectively prevents gas leakage and ensures the accuracy of the test results.

[0103] In the preferred embodiment, the second pressure gauge 11 and the exhaust valve 12 are both connected to the interior of the detection gas chamber 2. This configuration allows the gas in the detection gas chamber 2 to be quickly discharged when the pressure value exceeds the limit, while ensuring the sealing performance between the detection chamber 2 and the exhaust valve 12. The connection between the second pressure gauge 11 and the interior of the detection gas chamber 2 enables the internal connection of the detection gas chamber 2 to effectively detect the gas pressure value in the sealed top cover 1.

[0104] In a preferred embodiment, the exhaust valve 12 is configured as a rotary switch structure, which is made of wear-resistant material. The exhaust valve 12 also includes a sealing gasket connected to the rotary switch. The rotary switch structure facilitates operation by the operator. The sealing gasket connected to the rotary switch improves the sealing performance of the exhaust valve 12. Furthermore, the rotary switch structure of the exhaust valve 12 is made of wear-resistant material to ensure its service life and stability.

[0105] In a preferred embodiment, the exhaust valve 12 is equipped with an alarm device. When the gas pressure in the gas chamber 2 exceeds the limit, the exhaust protection prevents an explosion, and the alarm device can promptly alert the staff to take appropriate measures. This double protection and double insurance further enhances the reliability and safety of the device. In addition, the alarm device may include a sound alarm, a light alarm, etc., and a suitable alarm method can be selected according to the actual situation to better remind the staff to pay attention to the gas pressure in the gas chamber and take timely measures to deal with it.

[0106] In summary, this invention provides a device and its method of use with hydrogen refueling leak detection function. By setting up a dual-chamber design with a sealed top cover 1 and a detection gas chamber 2, the detection accuracy is increased while providing a buffer space between the two chambers, thus improving the safety of the device. The dual-chamber design with dual pressure gauges of the same specification and size further enhances the detection accuracy and provides double protection. The design of the leak valve and its installation structure ensures the balanced connection between the two chambers and allows for quick positioning and fixation of the leak valve during permeability testing, facilitating its testing and use. With its ingenious design, simple structure, convenient installation and disassembly, safety, reliability, and strong operability, this invention possesses high practical application value. The hydrogen refueling leak detection device of this invention can be widely used in hydrogen energy storage and transportation, hydrogen refueling stations, and other fields, improving the safety and reliability of hydrogen energy utilization and promoting the development of the hydrogen energy industry. Furthermore, the device has strong scalability and can be customized to meet the needs of different application scenarios for hydrogen refueling leak detection. Therefore, this invention has broad market prospects and significant economic value, yielding good economic and social benefits.

Claims

1. A device with hydrogen refueling leakage detection function, comprising a connecting mounting plate (3), characterized in that: The connecting mounting plate (3) has a hole in the middle, and a detection air box (2) is installed in the hole. A sealing top cover (1) is provided at the top of the detection air box (2). A spring (4) is sleeved on the upper outer wall of the detection air box (2) located on the connecting mounting plate (3). The top of the spring (4) is fixedly connected to the lower end of the sealing top cover (1). A first pressure gauge (9) and an air supply connector (10) are provided at the top of the sealing top cover (1). A venting valve mounting block (5) is provided at the top of the detection air box (2) inside the sealing top cover (1). A venting valve sealing ring (6) is fixedly installed on the upper surface of the venting valve mounting block (5). A venting valve fixing groove (7) is opened on the inner surface of the venting valve mounting block (5) for installing the venting valve. A gas guide pipe (8) is fixedly installed at the top of the detection air box (2). A second pressure gauge (11) is installed at its bottom. An exhaust valve (12) is installed on the side. An alarm device is provided on the exhaust valve (12).

2. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The outer wall of the top of the detection gas box (2) is provided with a sealing strip (13), which is in close contact with the inner wall of the sealing top cover (1).

3. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The sealing top cover (1) has a cylindrical structure and an opening at the top. The detection air box (2) is installed inside the sealing top cover (1) through the opening.

4. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The first pressure gauge (9) and the air supply connector (10) are both connected to the interior of the sealed top cover (1); the second pressure gauge (11) is the same size as the first pressure gauge (9), and the second pressure gauge (11) is the same model as the first pressure gauge (9).

5. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The gas guide pipe (8) is connected to the inside of the detection gas box (2). The upper end of the gas guide pipe (8) is fixedly connected to the gas release valve mounting block (5). The gas release valve mounting block (5) is provided with upper and lower through holes. The gas release valve is connected to the gas guide pipe (8) through the hole on the gas release valve mounting block (5). The gas release valve mounting block (5) and the gas guide pipe (8) are connected by a sealed connection.

6. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The second pressure gauge (11) and the exhaust valve (12) are both connected to the inside of the detection air box (2).

7. The device with hydrogen refueling leakage detection function according to claim 1, characterized in that: The exhaust valve (12) is configured as a rotary switch structure, which is made of wear-resistant material. The exhaust valve (12) also includes a sealing gasket connected to the rotary switch.

8. A method of using a device with hydrogen refueling leakage detection function, characterized in that, The method for detecting hydrogen refueling leakage using the device with hydrogen refueling leakage detection function as described in any one of claims 1 to 7 includes the following steps: Step 1: System initialization and basic device installation; Step 2: Install the pressure gauge, exhaust valve (12) and air supply connector (10), and conduct air tightness test and performance debugging; Step 3: After successful commissioning, assemble with the hydrogen refueling pipeline. When adding hydrogen, simultaneously monitor the gas pressure and trigger a leak alarm.

9. The method of using the device with hydrogen refueling leakage detection function according to claim 8, characterized in that, The specific steps for installing the basic device in Step 1 are as follows: Step 1.1: After all the components of a device with hydrogen refueling leakage detection function have passed the acceptance test, first insert the detection gas box (2) into the hole of the connecting mounting plate (3) and fix it. Then install the gas guide pipe (8) on the top of the detection gas box (2), install the leakage valve mounting block (5), the leakage valve sealing ring (6) and the leakage valve in sequence, and then install the spring (4) and the sealing strip (13) in sequence on the outside of the detection gas box (2). The lower end of the spring (4) is fixed to the upper plane of the connecting mounting plate (3). Step 1.2: After the spring (4) and sealing strip (13) are installed in place and the connection is confirmed to be tight, the sealing top cover (1) is then installed on the upper part of the test gas box (2), and the sealing top cover (1) is made to fit tightly with the sealing strip (13) on the outside of the test gas box (2). Then the upper end of the spring (4) is fixed to the lower end of the sealing top cover (1).

10. The method of using the device with hydrogen refueling leakage detection function according to claim 8, characterized in that, The specific steps of Step 2 are as follows: Step 2.1: After confirming that all parts are connected and tightened, install the first pressure gauge (9) and the air supply connector (10) on the top of the sealed top cover (1), install the second pressure gauge (11) on the bottom of the test air box (2), and install the exhaust valve (12) on the side to conduct the air tightness test and performance debugging of the device; Step 2.2: During the airtightness test, air is injected into the sealed top cover (1) through the air supply connector (10). The air forms a high pressure in the sealed top cover (1). At the same time, the first pressure gauge (9) detects the air pressure in the sealed top cover (1). Then, the air passes through the air release valve installed on the air release valve mounting block (5) and enters the air guide pipe (8), and then enters the interior of the test air box (2). The second pressure gauge (11) detects the air pressure in the test air box (2). The air permeability value of the air release valve is obtained by increasing the air pressure value of the second pressure gauge (11), thereby quickly testing the air permeability of the air release valve. When the air pressure value of the test air box (2) exceeds the set limit of the exhaust valve (12), the exhaust valve (12) is activated and starts to exhaust. Step 2.3: Inject air into the sealed top cover (1) through the air supply connector (10). The air forms a high pressure in the sealed top cover (1). At the same time, the air enters the air guide pipe (8) through the air vent valve installed on the vent valve mounting block (5). The sealed top cover (1) is forced to slide outward. The spring (4) installed at the lower end of the sealed top cover (1) is stretched. The internal space of the sealed top cover (1) expands, the air density decreases, and the air pressure of the sealed top cover (1) drops. The gas in the detection air box (2) flows to the sealed top cover (1) through the vent valve. When the pressure of the entire space exceeds the set value of the exhaust valve (12), the exhaust valve (12) starts to exhaust, reducing the gas pressure of the sealed top cover (1) and the detection air box (2).

11. The method of using the device with hydrogen refueling leakage detection function according to claim 8, characterized in that, The specific steps of Step 3 are as follows: Step 3.1: After the airtightness test and performance debugging of the device are qualified, install and fix the gas delivery connector (10) on the sealing cover at the connection between the connecting pipe and the gas filling pipe of the hydrogen dispenser. The gas delivery connector (10) is connected to the gas phase space inside the sealing cover. When hydrogen is added, there is a leak of hydrogen at the connection. The leaked hydrogen enters the sealing top cover (1) through the gas delivery connector (10). The hydrogen forms a high pressure in the sealing top cover (1). At the same time, the first pressure gauge (9) detects the pressure in the sealing top cover (1). Then the hydrogen passes through the vent valve installed on the vent valve mounting block (5) and enters the hydrogen gas guide pipe (8). Then it enters the interior of the detection gas box (2). The second pressure gauge (11) detects the pressure in the detection gas box (2). The staff can detect the hydrogen filling leak by the changes in the values ​​of the first pressure gauge (9) and the second pressure gauge (11). Step 3.2: Hydrogen enters the sealed top cover (1) through the gas delivery connector (10). The hydrogen forms a high pressure inside the sealed top cover (1). At the same time, the hydrogen enters the hydrogen gas pipeline (8) through the vent valve installed on the vent valve mounting block (5). The sealed top cover (1) is forced to slide outward. The spring (4) installed at the lower end of the sealed top cover (1) is stretched by force. The internal space of the sealed top cover (1) expands, the hydrogen density decreases, and the hydrogen pressure inside the sealed top cover (1) is reduced. The gas in the detection gas box (2) flows to the sealed top cover (1) through the vent valve. When the gas pressure of the sealed top cover (1) and the detection gas box (2) exceeds the set value of the exhaust valve (12), the exhaust valve (12) starts to release gas outward and triggers the alarm at the same time.

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