A pipe arrangement system for multiple vertical hydrogen storage cylinders on a vehicle

Abstract

The utility model relates to a kind of pipeline arrangement system of multiple vertical hydrogen storage bottles of vehicle, multiple hydrogen storage bottles are provided with bottle mouth valve and bottle tail valve, bottle mouth valve is connected with bottle mouth discharge pipeline and hydrogen inlet and outlet pipeline, bottle tail valve is connected with bottle tail discharge pipeline, bottle tail discharge pipeline is connected after being summarized with discharge main pipeline, hydrogen inlet and outlet pipeline is also connected with hydrogen outlet pipeline after being summarized, two groups of pressure regulating combination valves are connected in parallel on hydrogen outlet pipeline, end is connected with the interface to the battery pack of vehicle battery pack engine, the downstream hydrogen supply pipeline of two pressure regulating combination valves is connected with discharge main pipeline by needle valve. The discharge port of bottle mouth discharge pipeline and bottle tail discharge pipeline makes the orderly centralized discharge of hydrogen of overall pipeline, avoid excessive internal pressure of pipeline, hydrogen outlet pipeline is connected in parallel with two groups of pressure regulating combination valves, the hydrogen output of two groups of pressure regulating combination valves is simultaneously regulated to stable hydrogen flow by pressure reduction, ensure the hydrogen pressure and flow of output, meet the requirement of vehicle combustion.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically to a pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle. Background Technology

[0002] New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles. Among them, fuel cell electric vehicles are new energy electric vehicles that use electricity generated by an onboard fuel cell device as their power source. Hydrogen storage cylinders are indispensable onboard hydrogen storage containers within new energy vehicles. To ensure the reliability and space adaptability of the onboard hydrogen storage device, a large number of hydrogen storage cylinders are often used. For stability, hydrogen storage cylinders are best placed horizontally. However, due to space limitations and compatibility with other structures, sometimes it is necessary to place the hydrogen storage cylinders vertically. Using the original horizontal piping arrangement for multiple vertical hydrogen storage cylinders would increase the complexity of the piping, as the number of horizontal hydrogen storage cylinders is relatively small, and it is not suitable for the spatial arrangement of vertical hydrogen storage cylinders. Vertical hydrogen storage cylinders require a safer and more stable piping arrangement, necessitating a new, more reliable piping structure. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle, so as to solve the problem of needing a safer pipeline structure when the hydrogen storage cylinders are upright.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle includes multiple vertical hydrogen storage cylinders. Each cylinder has a valve at its top opening and a valve at its bottom. Two pipes extend from each valve, connecting to a discharge pipe and a hydrogen inlet / outlet pipe, respectively. The discharge pipes converge and connect to a first discharge port. The hydrogen inlet / outlet pipes converge and connect to one end of a hydrogen refueling pipe. The other end of the refueling pipe serves as a refueling port. Each cylinder's bottom valve is connected to... The tail discharge pipeline is connected, and the tail discharge pipeline is connected to the main discharge pipeline. The free end of the other end of the main discharge pipeline is the second discharge port. The inlet and outlet hydrogen pipelines are also connected to the outlet hydrogen pipeline. Two sets of pressure regulating combination valves are connected in parallel on the outlet hydrogen pipeline. The downstream end of the two pressure regulating combination valves is connected to the hydrogen supply pipeline. The end of the hydrogen supply pipeline is the fuel cell stack interface connected to the vehicle fuel cell stack engine. The downstream hydrogen supply pipeline of the two pressure regulating combination valves is connected to the main discharge pipeline through a needle valve. A ball valve is installed on the hydrogen supply pipeline near the fuel cell stack interface.

[0006] As a preferred embodiment, quick connectors are respectively provided on the free ports of the first and second discharge ports, and are located on the top side of the hydrogen storage cylinder.

[0007] As a preferred embodiment, the bottle neck valve includes a temperature sensor connected in series at the connection point of the hydrogen inlet and outlet pipelines, a high-pressure solenoid valve for controlling the hydrogen inlet and outlet, and a manual shut-off valve for mechanical closure during maintenance. The bottle neck valve also includes a safety pressure relief valve connected at the connection point of the bottle neck discharge pipeline.

[0008] In a preferred embodiment, the pressure regulating combination valve includes a low-pressure solenoid valve and a pressure reducing regulating valve connected in series with the hydrogen outlet pipeline. The low-pressure solenoid valve controls the hydrogen from the hydrogen outlet pipeline to be sent into the pressure regulating combination valve, and the pressure reducing regulating valve reduces the pressure of the high-pressure hydrogen from the hydrogen outlet pipeline. The reduced-pressure hydrogen is then sent into the hydrogen supply pipeline. The pressure regulating combination valve also includes a safety valve. The input end of the safety valve is connected downstream of the pressure reducing regulating valve, and the output end of the safety valve is connected to the discharge main pipeline through a second check valve.

[0009] As a preferred embodiment, a first filter for filtering injected hydrogen is provided near the hydrogen filling port on the hydrogen filling pipeline, and a first check valve is provided downstream of the first filter. A second filter for filtering output hydrogen is provided upstream of the two pressure regulating combination valves on the hydrogen outlet pipeline.

[0010] As a preferred embodiment, a hot-melt plug is provided in the safety relief valve of each bottle neck valve and in each bottle tail valve.

[0011] As a preferred embodiment, a flow limiting valve is installed near each bottle valve on the hydrogen inlet and outlet pipelines, a first pressure sensor is installed near a hydrogen storage bottle on the bottle outlet discharge pipeline, and a second pressure sensor is installed downstream of each of the two pressure regulating combination valves.

[0012] The beneficial effects of this utility model are as follows: A bottle mouth discharge pipe and a bottle tail discharge pipe are connected to the bottle mouth and bottle tail discharge pipe respectively at the bottle mouth and bottle tail discharge pipes. Quick connectors are installed at the discharge ports of the bottle mouth and bottle tail discharge pipes. When the internal gas temperature of the hydrogen bottle reaches 110±5℃, the hot-melt plugs of the bottle mouth valve and bottle tail valve melt, opening the valve passage. The gas pressure inside the hydrogen bottle flows through the first and second discharge pipes to the quick connectors. The quick connectors are opened by the gas pressure, allowing the hydrogen gas inside the bottle to be discharged in an orderly and concentrated manner, avoiding excessive internal gas pressure and potential danger. Before inspecting the pipeline system, the needle valve can be manually opened, and the system hydrogen gas is vented through the quick connector at the second discharge port, facilitating safe maintenance. The hydrogen inlet and outlet lines at the bottle neck are used to inject hydrogen for storage and to supply hydrogen for vehicle combustion. To simplify the pipeline structure, the hydrogen inlet and outlet lines are connected to the hydrogen refueling line for hydrogen intake. The hydrogen inlet and outlet lines are also connected to the hydrogen outlet line and the hydrogen supply line. Two sets of pressure regulating combination valves are connected in parallel between the hydrogen outlet line and the hydrogen supply line. The two sets of pressure regulating combination valves reduce the pressure of the hydrogen by regulating it, while delivering a stable supply of hydrogen to the vehicle and ensuring that the output hydrogen flow rate meets the vehicle's combustion requirements. The two sets of pressure regulating combination valves are equipped with safety valves connected to the exhaust main line. When the hydrogen pressure after regulation and reduction is too high, the safety valve opens, leading the hydrogen to the exhaust main line for centralized discharge, thus preventing excessive hydrogen pressure from damaging the vehicle's fuel cell stack engine. Attached Figure Description

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the hydrogen storage cylinder pipeline connection of this utility model;

[0015] Figure 2 This is a perspective view of the present utility model;

[0016] Figure 3 for Figure 2 Top view;

[0017] Figures 1-3 Explanation of reference numerals in the attached diagram: 1. Hydrogen storage cylinder; 2. Cylinder neck valve; 3. Cylinder tail valve; 4. Flow limiting valve; 5. High-pressure solenoid valve; 6. Hydrogen filling port; 7. First filter; 8. First check valve; 9. Pressure reducing regulating valve; 10. Safety valve; 11. Second check valve; 12. Low-pressure solenoid valve; 15. Second filter; 16. Needle valve; 17. Ball valve; 18. First discharge port; 19. To fuel cell stack interface; 20. Temperature sensor; 21. Manual shut-off valve; 22. Safety pressure relief valve; 23. Cylinder neck discharge line; 24. Hydrogen inlet / outlet line; 25. Cylinder tail discharge line; 26. Hydrogen filling line; 27. Hydrogen outlet line; 28. Discharge main line; 29. ​​Pressure regulating combination valve; 30. Hydrogen supply line; 31. Second discharge port; 32. First pressure sensor; 33. Second pressure sensor. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle described in this utility model is described in [reference needed]. Figures 1-3 As shown, the system includes multiple vertical hydrogen storage cylinders 1. Each cylinder 1 has a top valve 2 at its top opening and a bottom valve 3 at its bottom. Each cylinder valve 2 has two extensions connecting to a cylinder outlet valve 23 and a hydrogen inlet / outlet valve 24, respectively. The cylinder outlet valve 23 is connected to a first outlet 18, and the hydrogen inlet / outlet valve 24 is connected to one end of a hydrogen filling pipe 26. The other free end of the hydrogen filling pipe 26 is a hydrogen filling port 6 for adding hydrogen. Each cylinder 1's bottom valve 3 is connected to a bottom outlet valve 25. After being combined, the hydrogen inlet and outlet lines 25 are connected to the main emission line 28. The other end of the main emission line 28 is the second emission port 31. After being combined, the hydrogen inlet and outlet lines 24 are also connected to the hydrogen outlet line 27. Two sets of pressure regulating combination valves 29 are connected in parallel on the hydrogen outlet line 27. The downstream end of the two pressure regulating combination valves 29 is connected to the hydrogen supply line 30. The end of the hydrogen supply line 30 is the fuel cell stack interface 19 connected to the vehicle fuel cell stack engine. The downstream hydrogen supply line 30 of the two pressure regulating combination valves 29 is connected to the main emission line 28 through the needle valve 16. A ball valve 17 is provided on the hydrogen supply line 30 near the fuel cell stack interface 19.

[0020] Specifically, the tops of multiple vertical hydrogen storage cylinders 1 are connected to cylinder head discharge pipes 23, and the bottoms are connected to cylinder tail discharge pipes 25. The first discharge port 18 at the end of the cylinder head discharge pipe 23 and the second discharge port 31 at the end of the discharge main pipe 28 connected to the cylinder tail discharge pipe 25 are both located on one side of the top of the entire structure, facilitating the upward discharge of hydrogen from a high position to ensure safety. The top of the hydrogen storage cylinders 1 is also connected to hydrogen inlet and outlet pipes 24 for passing hydrogen. The hydrogen inlet and outlet pipes 24 are connected to the hydrogen refueling pipe 26 and the hydrogen outlet pipe 27, respectively. When the hydrogen in the hydrogen storage cylinders 1 is insufficient, hydrogen is sequentially added to the multiple hydrogen storage cylinders 1 through the hydrogen refueling pipe 26 and the hydrogen inlet and outlet pipes 24. When the hydrogen in the hydrogen storage cylinders 1 is supplied to the vehicle's fuel cell stack engine, high-pressure hydrogen is released from multiple... Hydrogen gas from each hydrogen storage cylinder 1 flows sequentially through inlet / outlet hydrogen pipelines 24, outlet hydrogen pipeline 27, and two pressure regulating combination valves 29 to reduce pressure until it stabilizes. The hydrogen supply pipeline 30 connects to the vehicle's fuel cell stack engine, forming a hydrogen supply path. The hydrogen supply pipeline 30 is connected to the exhaust main pipeline 28 via needle valve 16. When the pipeline needs maintenance, needle valve 16 is opened, allowing all hydrogen in the pipeline to be centrally discharged through the second exhaust port 31. Maintenance is then carried out after the hydrogen is vented, ensuring safety. Ball valve 17 is a manual control switch used to adjust and control the hydrogen flow rate and to cut off and allow for hydrogen flow. Manual operation ensures reliability. This system allows for the arrangement of pipelines for six or more hydrogen storage cylinders 1. The pipelines are located at the top, bottom, and one side of each hydrogen storage cylinder 1, resulting in neat installation and minimal space occupation.

[0021] In this embodiment, quick connectors are respectively provided on the free ports of the first discharge port 18 and the second discharge port 31, and are located on the top side of the hydrogen storage cylinder 1. Hydrogen gas tends to rise, and placing the first discharge port 18 and the second discharge port 31 at the top of the whole facilitates the discharge of hydrogen gas from the whole pipeline and the hydrogen storage cylinder 1. When the quick connectors at the ends of the first discharge port 18 and the second discharge port 31 are driven by sufficient gas pressure, they will open, allowing the hydrogen gas to be discharged in a concentrated manner, ensuring the safety of the whole pipeline.

[0022] In this embodiment, the bottle neck valve 2 includes a temperature sensor 20 connected in series with the hydrogen inlet / outlet pipeline 24, a high-pressure solenoid valve 5 for controlling the inlet / outlet of hydrogen, and a manual shut-off valve 21 for mechanical closure during maintenance. The bottle neck valve 2 also includes a safety pressure relief valve 22 connected with the bottle neck discharge pipeline 23. The bottle neck valve 2 integrates multiple detection and control elements into a combined valve, achieving a simple overall structure and small size while ensuring functionality.

[0023] In this embodiment, the pressure regulating combination valve 29 includes a low-pressure solenoid valve 12 and a pressure reducing regulating valve 9 connected in series with the hydrogen outlet pipeline 27. The low-pressure solenoid valve 12 controls the hydrogen gas delivered from the hydrogen outlet pipeline 27 to enter the pressure regulating combination valve 29. The pressure reducing regulating valve 9 reduces the pressure of the high-pressure hydrogen gas delivered from the hydrogen outlet pipeline 27. The reduced-pressure hydrogen gas is then sent to the hydrogen supply pipeline 30. The pressure regulating combination valve 29 also includes a safety valve 10. The input end of the safety valve 10 is connected to the downstream of the pressure reducing regulating valve 9, and the output end of the safety valve 10 is connected to the discharge main pipeline 28 through a second check valve 11. The high-pressure hydrogen from the hydrogen storage cylinder 1 is regulated by the pressure regulating combination valve 29 to achieve a stable output pressure for the vehicle's fuel cell stack engine. To ensure that the output pressure and high flow rate meet the fuel cell stack engine's requirements, two pressure regulating combination valves 29 are connected in parallel. In case of a fault, such as the pressure reducing valve 9 failing to reduce pressure, the safety valve 10 inside the two pressure regulating combination valves 29 opens, introducing hydrogen into the discharge main line 28 for discharge. The safety valve 10 is normally closed. When the output pressure of the pressure reducing valve 9 exceeds the specified value, it releases the medium to the outside of the system to prevent the high-pressure hydrogen in the hydrogen supply line 30 from damaging the fuel cell stack engine equipment. The second one-way valve 11 ensures that the hydrogen flows in the discharge direction, preventing the high-pressure hydrogen discharged from the cylinder tail valve 3 from flowing through the discharge main line 28 to the pressure regulating combination valve 29 and then through the internal passage of the pressure regulating combination valve 29 to the rear-end vehicle fuel cell stack engine under extreme high-temperature conditions.

[0024] In this embodiment, a first filter 7 for filtering injected hydrogen is installed on the hydrogen refueling pipeline 26 near the hydrogen refueling port 6. A first check valve 8 is installed downstream of the first filter 7. A second filter 15 for filtering output hydrogen is installed on the hydrogen outlet pipeline 27 upstream of the two pressure regulating combination valves 29. The hydrogen refueling port 6 is located near the bottom of the overall system, which is conducive to hydrogen injection. The hydrogen refueling port 6 is connected to a hydrogen refueling station. The first filter 7 has a specification of 15 microns and performs preliminary filtration of gaseous impurities that will enter the hydrogen storage tank 1. The second filter 15 has a specification of 7 microns and performs secondary filtration to prevent impurities from entering the vehicle equipment.

[0025] In this embodiment, each of the safety relief valves 22 at the bottle neck valve 2 and each of the bottle tail valves 3 is equipped with a fusible plug. When the gas temperature inside the hydrogen storage cylinder 1 rises to 110±5℃, the fusible plugs in the safety relief valves 22 at the bottle neck and the bottle tail valve 3 of the hydrogen storage cylinder 1 melt, and hydrogen gas begins to be discharged from the bottle neck and the bottle tail simultaneously. The gas is discharged in an orderly manner through the quick connectors on the first discharge port 18 and the second discharge port 31, reducing the gas pressure in the hydrogen storage cylinder 1 and the pipeline, and reducing the risk of explosion.

[0026] In this embodiment, a flow-limiting valve 4 is installed near each bottle valve 2 on the hydrogen inlet / outlet pipeline 24. A first pressure sensor 32 is installed near a hydrogen storage cylinder 1 on the bottle outlet pipeline 23. Second pressure sensors 33 are respectively installed downstream of the two pressure regulating combination valves 29. Each flow-limiting valve 4 controls the speed of hydrogen outward flow to prevent excessive hydrogen leakage. In the event of a break or rupture in the external pipeline, it can prevent a large amount of hydrogen from leaking out of the hydrogen storage cylinder 1 and causing secondary damage, such as fire or suffocation. The first pressure sensor 32 and the second pressure sensor 33 are used to detect the pressure in the corresponding pipeline and output signals to serve as warnings and regulators.

[0027] The working process of this utility model is as follows:

[0028] As shown in Figures 1-3, when injecting hydrogen into each hydrogen storage cylinder 1, the manual shut-off valve 21 on each cylinder valve 2 is in the open state. The hydrogen filling port 6 is connected to the hydrogen injection pipeline of the hydrogen refueling station. The hydrogen enters the hydrogen storage pipeline system through the hydrogen filling port 6 device. First, it passes through the first filter 7 to filter out gas impurities. Then, after passing through the first one-way valve 8, it enters each hydrogen storage cylinder 1 through each branch pipeline on the inlet and outlet hydrogen pipeline 24 via the cylinder valve 2.

[0029] When supplying hydrogen to the vehicle's fuel cell stack engine, the high-pressure solenoid valve 5 on each cylinder valve 2 is energized, causing the high-pressure solenoid valve 5 to open. High-pressure hydrogen is then supplied from each hydrogen storage cylinder 1 to the inlet / outlet hydrogen pipeline 24. After the high-pressure hydrogen is collected, it undergoes secondary filtration through the second filter 15 to prevent impurities from entering the vehicle's equipment. Then, it passes through two sets of parallel pressure regulating combination valves 29 to simultaneously regulate and reduce the pressure of the high-pressure hydrogen. After being depressurized by the two pressure regulating combination valves 29, the hydrogen flows to the fuel cell stack interface 19 and is then supplied to the vehicle's power generation unit for combustion and power generation.

[0030] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A pipeline arrangement system for multiple vertical hydrogen storage cylinders mounted on a vehicle, characterized in that, The system includes multiple vertical hydrogen storage cylinders (1). Each hydrogen storage cylinder (1) has a cylinder valve (2) at its top opening and a cylinder tail valve (3) at its bottom. Each cylinder valve (2) has two pipes extending from it, which are connected to a cylinder outlet pipe (23) and a hydrogen inlet / outlet pipe (24) respectively. The cylinder outlet pipe (23) is connected to the first outlet (18) after being combined. The hydrogen inlet / outlet pipe (24) is connected to one end of a hydrogen filling pipe (26) after being combined. The other free end of the hydrogen filling pipe (26) is the hydrogen filling port (6) used for adding hydrogen. Each hydrogen storage cylinder (1) has a cylinder tail valve (3) connected to a cylinder tail outlet pipe (25). After being combined, the hydrogen supply lines are connected to the main emission line (28). The other end of the main emission line (28) is the second emission port (31). After being combined, the hydrogen supply lines (24) are also connected to the hydrogen outlet line (27). Two sets of pressure regulating combination valves (29) are connected in parallel on the hydrogen outlet line (27). The downstream end of the two pressure regulating combination valves (29) is connected to the hydrogen supply line (30). The end of the hydrogen supply line (30) is the fuel cell stack interface (19) connected to the fuel cell stack engine of the whole vehicle. The downstream hydrogen supply line (30) of the two pressure regulating combination valves (29) is connected to the main emission line (28) through the needle valve (16). A ball valve (17) is installed on the hydrogen supply line (30) near the fuel cell stack interface (19).

2. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle as described in claim 1, characterized in that, Quick connectors are provided on the free ports of the first discharge port (18) and the second discharge port (31), respectively, and are located on the top side of the hydrogen storage cylinder (1).

3. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle according to claim 1, characterized in that, The bottle valve (2) includes a temperature sensor (20) connected in series with the hydrogen inlet / outlet pipeline (24), a high-pressure solenoid valve (5) for controlling the hydrogen inlet / outlet, and a manual shut-off valve (21) for mechanically closing during maintenance. The bottle valve (2) also includes a safety relief valve (22) connected with the bottle outlet pipeline (23).

4. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle according to claim 1, characterized in that, The pressure regulating combination valve (29) includes a low-pressure solenoid valve (12) and a pressure reducing regulating valve (9) connected in series at the connection of the hydrogen outlet pipeline. The low-pressure solenoid valve (12) controls the hydrogen gas delivered from the hydrogen outlet pipeline (27) to enter the pressure regulating combination valve (29). The pressure reducing regulating valve (9) reduces the pressure of the high-pressure hydrogen gas delivered from the hydrogen outlet pipeline (27). The reduced-pressure hydrogen gas is then sent to the hydrogen supply pipeline (30). The pressure regulating combination valve (29) also includes a safety valve (10). The input end of the safety valve (10) is connected to the downstream of the pressure reducing regulating valve (9). The output end of the safety valve (10) is connected to the discharge main pipeline (28) through the second check valve (11).

5. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle according to claim 1, characterized in that, The hydrogen filling pipeline (26) is provided with a first filter (7) for filtering injected hydrogen near the hydrogen filling port (6). A first check valve (8) is provided downstream of the first filter (7). The hydrogen outlet pipeline (27) is provided with a second filter (15) for filtering output hydrogen upstream of the two pressure regulating combination valves (29).

6. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle according to claim 3, characterized in that, Each of the bottle neck valves (2) has a safety relief valve (22) inside and each bottle tail valve (3) has a hot melt plug inside.

7. The pipeline arrangement system for multiple vertical hydrogen storage cylinders on a vehicle according to claim 1, characterized in that, A flow limiting valve (4) is installed on each of the inlet and outlet hydrogen pipelines (24) near each bottle valve (2). A first pressure sensor (32) is installed on the bottle outlet discharge pipeline (23) near a hydrogen storage bottle (1). A second pressure sensor (33) is installed downstream of each of the two pressure regulating combination valves (29).

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