A hydrogen tube trailer safety shut-off system

Abstract

The utility model discloses a kind of hydrogen long pipe trailer safety cut-off system, by setting first pneumatic valve and second pneumatic valve, first pneumatic valve is operated by operator from front storehouse and cuts off hydrogen gas source, second pneumatic valve is controlled by filling station or hydrogenation station, when operator cannot cut off hydrogen gas source from site or cut off gas source from site and face personal safety threat, it can be cut off by filling station or hydrogenation station remotely.The main technical scheme of the utility model is as follows: a kind of hydrogen long pipe trailer safety cut-off system, including inlet / outlet, first pneumatic valve, second pneumatic valve and at least one hydrogen cylinder;Inlet / outlet is connected with second pneumatic valve, second pneumatic valve is connected with first pneumatic valve, first pneumatic valve is connected with hydrogen cylinder;Still include: on-vehicle gas cylinder, total control cut-off valve and gas station gas source;On-vehicle gas cylinder is used to be connected with first pneumatic valve;Total control cut-off valve is connected with gas station gas source, total control cut-off valve is used to be connected with second pneumatic valve.The utility model is mainly used for hydrogen long pipe trailer.

Description

Technical Field

[0001] This invention relates to the field of hydrogen filling technology, and in particular to a safety shut-off system for a hydrogen long-tube trailer. Background Technology

[0002] A hydrogen tube trailer is a system consisting of several high-pressure gas cylinders assembled on a semi-trailer chassis for transporting high-pressure hydrogen. It is equipped with corresponding pipelines, valves, safety systems, etc., and together with the semi-trailer chassis, it forms a vehicle for land transportation of high-pressure hydrogen.

[0003] Some existing hydrogen long-tube trailers are equipped with an emergency shut-off system on the main pipeline between the gas cylinder root valve and the control main valve. This system is designed to cut off the gas supply from the front compartment in case of production abnormalities or accidents, thereby closing the emergency shut-off valve and ensuring the safety of operators and the production system. However, when an accident occurs, such as a broken filling hose or a malfunction at the filling main valve, a large amount of hydrogen can leak rapidly, forming a huge explosive gas cloud around the leak point. Calculations show that approximately 6 kilograms of hydrogen can form a cloud approximately 1200 meters in diameter. 3 The explosive gas cloud, and the effective filling capacity of the hydrogen long tube trailer is as high as 550 kg, the radius of the explosive gas cloud formed when it leaks will be far greater than the length of the vehicle. That is, when a person cuts off the gas source from the front compartment, he is still within the range of this explosive gas cloud. At this time, due to factors such as static electricity on the operator's body, an explosion may still be triggered, which poses a serious threat to personal safety. Utility Model Content

[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, this utility model provides a safety cut-off system for hydrogen long-tube trailers.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model provides a safety shut-off system for hydrogen long-tube trailers, including:

[0007] Inlet / outlet, first pneumatic valve, second pneumatic valve, and at least one hydrogen cylinder;

[0008] The inlet / outlet is connected to the second pneumatic valve, the second pneumatic valve is connected to the first pneumatic valve, and the first pneumatic valve is connected to the hydrogen cylinder;

[0009] It also includes: vehicle-mounted gas cylinders, master control shut-off valve, and gas station gas source;

[0010] The vehicle-mounted gas cylinder is used to connect to the first pneumatic valve;

[0011] The main control shut-off valve is connected to the gas station's gas source, and it is used to connect to the second pneumatic valve.

[0012] Both the first pneumatic valve and the second pneumatic valve are pneumatic two-position shut-off ball valves.

[0013] The gas source for the gas station is either a nitrogen self-filling station or a hydrogen refueling station.

[0014] This also includes:

[0015] The first hose and the first hose quick connector are connected to the vehicle-mounted gas cylinder and the first hose quick connector. The first hose is connected to the first hose quick connector and the first hose quick connector is detachably plugged into the first pneumatic valve.

[0016] This also includes:

[0017] The second hose and the second hose quick connector are connected to the main control shut-off valve and the second hose. The second hose is connected to the second hose quick connector and the second hose quick connector is detachably plugged into the second pneumatic valve.

[0018] Among them, the main control shut-off valve is either a pneumatic valve or an explosion-proof solenoid valve.

[0019] This also includes:

[0020] The pressure reducing valve is connected to the main control shut-off valve, and the pressure reducing valve is connected to the gas station's gas source.

[0021] This also includes:

[0022] An additional pipeline valve is connected to the vehicle-mounted gas cylinder, and the additional pipeline valve is used to connect to the second pneumatic valve.

[0023] It also includes: a third hose and a third hose quick connector, an additional pipeline valve connected to the third hose, the third hose connected to the third hose quick connector, and the third hose quick connector detachably connected to the second pneumatic valve.

[0024] This also includes:

[0025] At least one manual shut-off valve is provided between the inlet / outlet and the second pneumatic valve.

[0026] This utility model proposes a safety shut-off system for a hydrogen long-tube trailer. A dual emergency shut-off valve, consisting of a first pneumatic valve and a second pneumatic valve, is installed on the pipeline between the hydrogen cylinder and the inlet / outlet. The first pneumatic valve uses the onboard gas cylinder as its gas source, allowing operators to cut off the hydrogen source from the front compartment in an emergency, preventing hydrogen leakage. The second pneumatic valve is controlled by the filling station or hydrogen refueling station, enabling remote control from the trailer. In cases of large leaks where operators cannot cut off the hydrogen source on-site or face personal safety threats, the filling station or hydrogen refueling station can remotely shut off the gas. When the long-tube trailer needs filling, the dual emergency shut-off valves must be opened. In case of production abnormalities or accidents, the leak source can be cut off from the site or the main control room, fully ensuring the safety of personnel and equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a safety cut-off system for a hydrogen long-tube trailer provided in an embodiment of the present invention.

[0028] The components are as follows: Front compartment area-01, Rear compartment area-02, Nitrogen filling station or hydrogen refueling station area-03, Inlet / outlet port-1, First pneumatic valve-2, Second pneumatic valve-3, Hydrogen cylinder-4, Vehicle-mounted gas cylinder-5, Main control shut-off valve-6, Gas station gas source-7, First hose-8, First hose quick connector-9, Second hose-10, Second hose quick connector-11, Pressure reducing valve-12, Additional pipeline valve-13, Third hose-14, Third hose quick connector-15, Manual shut-off valve-16, Branch valve-17, Drain valve-18, Thermometer-19, Pressure gauge-20. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the hydrogen long-tube trailer safety cut-off system proposed according to this utility model.

[0030] like Figure 1 As shown, this utility model provides a safety shut-off system for hydrogen long-tube trailers, comprising:

[0031] Inlet / outlet 1, first pneumatic valve 2, second pneumatic valve 3, and at least one hydrogen cylinder 4;

[0032] The inlet / outlet 1 is connected to the second pneumatic valve 3, the second pneumatic valve 3 is connected to the first pneumatic valve 2, and the first pneumatic valve 2 is connected to the hydrogen cylinder 4.

[0033] It also includes: vehicle-mounted gas cylinder 5, main control shut-off valve 6, and gas station gas source 7;

[0034] The vehicle-mounted gas cylinder 5 is used to connect to the first pneumatic valve 2;

[0035] The main control shut-off valve 6 is connected to the gas station's gas source 7, and the main control shut-off valve 6 is used to connect to the second pneumatic valve 3.

[0036] like Figure 1 As shown, the hydrogen long-tube trailer is assembled from several high-pressure hydrogen cylinders 4 mounted on a semi-trailer chassis, which can be seven hydrogen cylinders 4 as shown in the figure. Each hydrogen cylinder 4 is connected to a main pipeline via its own branch pipe, indirectly connected to the inlet / outlet port 1, which is used to connect to the hydrogen source. The hydrogen long-tube trailer includes a front compartment area 01 located on the side of the hydrogen cylinders 4 furthest from the filling port. This area is the operator's activity area inside the vehicle, where the operator can manually control various related valves. The hydrogen long-tube trailer also includes a rear compartment area 02, where the main pipeline, valves on the main pipeline, and the inlet / outlet port 1 are all located. When the hydrogen long-tube trailer needs to be refueled, it drives into an area 03 near a nitrogen filling station or hydrogen refueling station, such as... Figure 1 The location of the nitrogen filling station or hydrogen refueling station area 03 in the diagram is for illustrative purposes only. The actual distance between the nitrogen filling station or hydrogen refueling station area 03 and the hydrogen refueling station trailer is not as shown in the diagram. The distance between the nitrogen filling station or hydrogen refueling station area 03 and the hydrogen refueling station trailer is at least greater than the length of the hydrogen refueling station trailer. For example, the nitrogen filling station or hydrogen refueling station area 03 is at least outside the range of the explosive gas cloud formed in the event of a leak from the hydrogen refueling station trailer. The distance relationships in the diagram are not drawn to scale and are only an illustration of the connection relationships between the components.

[0037] Each hydrogen cylinder 4 has a root valve on its corresponding branch pipe. A first pneumatic valve 2 and a second pneumatic valve 3 are installed on the main pipeline between the root valve and the inlet / outlet 1. These first and second pneumatic valves 2 and 3 are emergency shut-off devices, used to immediately cut off the connection between the inlet / outlet 1 and the hydrogen cylinder 4 in case of production abnormalities or accidents, thereby preventing further leakage and ensuring the safety of operators and the production equipment. The first and second pneumatic valves 2 and 3 are connected in series on the main pipeline and are both pneumatic valves, such as two-position pneumatic shut-off ball valves. The order of the first and second pneumatic valves 2 and 3 can be adjusted as needed; for example, the first pneumatic valve 2 can be connected to the inlet / outlet 1, and the second pneumatic valve 3 can be connected to the hydrogen cylinder 4.

[0038] The vehicle-mounted gas cylinder 5 can be of various types. It has a manually operated valve, allowing operators in the front compartment area 01 to control the supply of gas pressure to the first pneumatic valve 2. The vehicle-mounted gas cylinder 5 serves as the hydrogen source for the first pneumatic valve 2. Alternatively, the vehicle-mounted gas cylinder 5 can be a nitrogen cylinder.

[0039] Gas source 7 at the gas station is a gas source for either a nitrogen self-filling station or a hydrogen refueling station, meaning it's not located on the hydrogen tube trailer and serves as the hydrogen source for the second pneumatic valve 3. Gas source 7 is connected to the second pneumatic valve 3 via a main control shut-off valve 6. This connection is detachable; when the hydrogen tube trailer approaches the nitrogen self-filling station or hydrogen refueling station, the operator connects the main control shut-off valve 6 to the second pneumatic valve 3. After filling, before the hydrogen tube trailer leaves, the main control shut-off valve 6 is disconnected from the second pneumatic valve 3. The connection between the vehicle-mounted gas cylinder 5 and the first pneumatic valve 2 can be either detachable or always connected. During hydrogen filling...

[0040] It is worth noting that the connection defined in this application refers to a connection through a pipe or conduit to achieve communication, allowing gas flow between the two connected components. The pipe or conduit can be a flexible hose, a rigid pipe, or a vehicle-mounted conduit available in the prior art, which is understood by those skilled in the art and will not be elaborated further. For example, in this application, the connecting conduit for the first pneumatic valve 2 and the second pneumatic valve 3 is a stainless steel pipe.

[0041] In use, first inject hydrogen into inlet / outlet 1. The first pneumatic valve 2 and the second pneumatic valve 3 are normally closed when there is no pressure. Open the vehicle-mounted gas cylinder 5. When pressurized gas from the cylinder enters the first pneumatic valve 2, the valve opens. Open the main control shut-off valve 6. When pressurized gas from the gas station's gas source 7 enters the second pneumatic valve 3, the valve opens. Hydrogen then begins to fill through inlet / outlet 1, flowing at least through the first pneumatic valve 2, the second pneumatic valve 3, and the root valve before finally filling the hydrogen cylinder 4. When it is necessary to close the first pneumatic valve 2 or the second pneumatic valve 3, or in case of an emergency leak, the operator can manually close the vehicle-mounted gas cylinder 5, releasing the pressure on the first pneumatic valve 2. The first pneumatic valve 2 will then close quickly, preventing hazardous materials from flowing into the accident site. Alternatively, if the leakage range is large and operators cannot approach the front compartment area 01, the main control shut-off valve 6 can be closed at the nitrogen self-filling station or hydrogen refueling station to release the pressure on the second pneumatic valve 3. The second pneumatic valve 3 will then close quickly, thereby achieving remote shut-off away from the hydrogen tube trailer and ensuring operational safety.

[0042] This utility model proposes a safety shut-off system for a hydrogen long-tube trailer. A dual emergency shut-off valve, consisting of a first pneumatic valve and a second pneumatic valve, is installed on the pipeline between the hydrogen cylinder and the inlet / outlet. The first pneumatic valve uses the onboard gas cylinder as its gas source, allowing operators to cut off the hydrogen source from the front compartment in an emergency, preventing hydrogen leakage. The second pneumatic valve is controlled by the filling station or hydrogen refueling station, enabling remote control from the trailer. In cases of large leaks where operators cannot cut off the hydrogen source on-site or face personal safety threats, the filling station or hydrogen refueling station can remotely shut off the gas. When the long-tube trailer needs filling, the dual emergency shut-off valves must be opened. In case of production abnormalities or accidents, the leak source can be cut off from the site or the main control room, fully ensuring the safety of personnel and equipment.

[0043] In one embodiment, the hydrogen long-tube trailer safety cut-off system further includes: a first hose 8 and a first hose quick connector 9, the vehicle-mounted gas cylinder 5 is connected to the first hose 8, the first hose 8 is connected to the first hose quick connector 9, and the first hose quick connector 9 is detachably plugged into the first pneumatic valve 2.

[0044] A PU air source with a quick-connect hose can be used. When in use, the first hose quick connector 9 is plugged into the first pneumatic valve 2 to connect the vehicle air cylinder 5 to the first pneumatic valve 2. When not in use, the first hose quick connector 9 is unplugged from the first pneumatic valve 2 to prevent the first pneumatic valve 2 from being opened accidentally.

[0045] In one embodiment, the hydrogen long-tube trailer safety cut-off system further includes: a second hose 10 and a second hose quick connector 11, a main control cut-off valve 6 connected to the second hose 10, the second hose 10 connected to the second hose quick connector 11, and the second hose quick connector 11 detachably connected to the second pneumatic valve 3.

[0046] A PU gas source with a quick-connect hose can be used. During use, the second hose quick connector 11 is plugged into the second pneumatic valve 3 to connect the gas source 7 of the gas station to the second pneumatic valve 3. After refueling, the second hose quick connector 11 is unplugged from the second pneumatic valve 3 to disconnect the nitrogen self-filling station or hydrogen refueling station from the second pneumatic valve 3 or the hydrogen long tube trailer, so that the hydrogen long tube trailer can drive away.

[0047] The main control shut-off valve 6 can be either a pneumatic valve or an explosion-proof solenoid valve. The main control shut-off valve 6 can take various forms, allowing it to be controlled within the nitrogen self-filling station or hydrogen refueling station, thus cutting off the gas supply 7 between the gas station and the second pneumatic valve 3. For example, the main control shut-off valve 6 can be supplied with gas from a gas source with a controllable valve within the nitrogen self-filling station or hydrogen refueling station to achieve on / off control. Alternatively, the main control shut-off valve 6 can be an electrically controlled valve, such as an explosion-proof solenoid valve. A main controller is installed in the main control room of the nitrogen self-filling station or hydrogen refueling station, and the main control shut-off valve 6 is connected to the main controller. The main controller then sends a shut-off signal to control whether the main control shut-off valve 6 is energized, thereby controlling the on / off of the gas supply 7 between the gas station and the second pneumatic valve 3. In some embodiments, the gas source 7 has a built-in valve that can serve as the main control shut-off valve 6. This allows for the cutting off of gas supply from areas outside the affected area when the hydrogen long-tube trailer leaks.

[0048] In one embodiment, the hydrogen long-tube trailer safety shut-off system further includes: a pressure reducing valve 12, a main control shut-off valve 6 connected to the pressure reducing valve 12, and the pressure reducing valve 12 connected to the gas station gas source 7.

[0049] Since the pressure provided by the gas station gas source 7 may not meet the working pressure requirements of the second pneumatic valve 3, a pressure reducing valve 12 is installed to reduce the high-pressure gas of the gas station gas source 7 to the required low-pressure level, ensuring the safety of the second pneumatic valve 3 and the personnel.

[0050] In one embodiment, the hydrogen long-tube trailer safety cut-off system further includes: an additional pipeline valve 13, which is connected to the on-board gas cylinder 5, and is connected to a second pneumatic valve 3.

[0051] The outlet of the vehicle-mounted gas cylinder 5 is divided into two branches. The first branch supplies gas to the first pneumatic valve 2, and the second branch supplies gas to the second pneumatic valve 3. An auxiliary pipeline valve 13 is installed on the second branch, which can be a manual valve. In special circumstances, such as when the nitrogen self-filling station or hydrogen refueling station where the hydrogen tube trailer is parked does not have a gas supply device for the second pneumatic valve 3, or when the gas supply device for the second pneumatic valve 3 is damaged, with the consent of the filling station or hydrogen refueling station, the vehicle-mounted gas cylinder 5 can be used as the gas source for the second pneumatic valve 3 to ensure normal hydrogen filling. The auxiliary pipeline valve 13 allows for independent control of the second branch's operation. If the vehicle-mounted gas cylinder 5 is not needed to supply gas to the second pneumatic valve 3, the second branch can be shut off.

[0052] In one embodiment, the hydrogen long-tube trailer safety cut-off system further includes: a third hose 14 and a third hose quick connector 15, an additional pipeline valve 13 connected to the third hose 14, the third hose 14 connected to the third hose quick connector 15, and the third hose quick connector 15 detachably connected to the second pneumatic valve 3.

[0053] A PU gas source with a quick-connect hose can be used. During use, the vehicle gas cylinder 5 can be connected to the second pneumatic valve 3 by plugging the third hose quick connector 15. After refueling, the vehicle gas cylinder 5 can be disconnected from the second pneumatic valve 3 by unplugging the third hose quick connector 15, thus preventing the second pneumatic valve 3 from being opened accidentally.

[0054] In one embodiment, the hydrogen long-tube trailer safety shut-off system further includes at least one manual shut-off valve 16, which is disposed between the inlet / outlet port 1 and the second pneumatic valve 3. This allows for manual shut-off of the pipeline in special circumstances.

[0055] In some embodiments, each hydrogen cylinder 4 is also equipped with a drain pipe, and a drain valve 18 is installed on the drain pipe to selectively discharge useless fluid from the hydrogen cylinder 4.

[0056] In some embodiments, a branch valve 17 is provided on the branch pipe of the hydrogen cylinder 4, which allows for selective filling of the hydrogen cylinder 4.

[0057] In some embodiments, a thermometer 19 and a pressure gauge 20 are also installed on the branch pipe of the hydrogen cylinder 4, so that the temperature and pressure of the hydrogen refueling process can be obtained and the hydrogen refueling process can be monitored.

[0058] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A safety shut-off system for a hydrogen long-tube trailer, characterized in that, include: Inlet / outlet (1), first pneumatic valve (2), second pneumatic valve (3) and at least one hydrogen cylinder (4); The inlet / outlet (1) is connected to the second pneumatic valve (3), the second pneumatic valve (3) is connected to the first pneumatic valve (2), and the first pneumatic valve (2) is connected to the hydrogen cylinder (4). It also includes: vehicle-mounted gas cylinder (5), main control shut-off valve (6) and gas station gas source (7); The vehicle-mounted gas cylinder (5) is used to connect to the first pneumatic valve (2); The main control shut-off valve (6) is connected to the gas station gas source (7), and the main control shut-off valve (6) is used to connect to the second pneumatic valve (3).

2. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Both the first pneumatic valve (2) and the second pneumatic valve (3) are pneumatic two-position shut-off ball valves.

3. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, The gas source (7) of the gas station is a nitrogen self-filling station or a hydrogen refueling station.

4. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Also includes: The first hose (8) and the first hose quick connector (9) are connected to the vehicle gas cylinder (5), the first hose (8) is connected to the first hose quick connector (9), and the first hose quick connector (9) is detachably plugged into the first pneumatic valve (2).

5. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Also includes: The second hose (10) and the second hose quick connector (11) are connected. The main control shut-off valve (6) is connected to the second hose (10). The second hose (10) is connected to the second hose quick connector (11). The second hose quick connector (11) is detachably plugged into the second pneumatic valve (3).

6. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, The main control shut-off valve (6) is either a pneumatic valve or an explosion-proof solenoid valve.

7. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Also includes: Pressure reducing valve (12), the main control shut-off valve (6) is connected to the pressure reducing valve (12), and the pressure reducing valve (12) is connected to the gas station gas source (7).

8. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Also includes: An additional pipeline valve (13) is connected to the vehicle-mounted gas cylinder (5) and is used to connect to the second pneumatic valve (3).

9. The hydrogen long-tube trailer safety shut-off system according to claim 8, characterized in that, Also includes: The third hose (14) and the third hose quick connector (15) are connected, the additional pipeline valve (13) is connected to the third hose (14), the third hose (14) is connected to the third hose quick connector (15), and the third hose quick connector (15) is detachably plugged into the second pneumatic valve (3).

10. The hydrogen long-tube trailer safety cut-off system according to claim 1, characterized in that, Also includes: At least one manual shut-off valve (16) is disposed between the inlet / outlet (1) and the second pneumatic valve (3).

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