Instrument valve box assembly for vehicle-mounted liquid hydrogen system

Abstract

The utility model relates to the technical field of liquid hydrogen storage and supply systems, and discloses an instrument valve box assembly for a vehicle-mounted liquid hydrogen system, which comprises a box body, a liquid hydrogen storage tank, a liquid hydrogen storage tank, a liquid hydrogen storage tank and a liquid hydrogen storage tank, the pipeline system is arranged in the box body, the pipeline system comprises a plurality of pipelines which are compactly arranged, and the plurality of pipelines are respectively communicated with the air inlet main pipe; and the explosion-proof box is fixedly connected with the outer wall of the box body, and the interior of the explosion-proof box is suitable for installing a control communication module. According to the instrument valve box assembly for the vehicle-mounted liquid hydrogen system, the plurality of pipelines are communicated with the liquid hydrogen container through the gas inlet header pipe, so that connecting points of a pipeline system and the liquid hydrogen container are reduced, and the convenience of disassembly, assembly and maintenance is improved; and the control communication module is wrapped with the explosion-proof box, so that the control communication module is separated from the hydrogen environment, and the potential safety hazard of explosion in the low-temperature and vibration environment is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid hydrogen storage and supply systems, specifically to an instrument valve box assembly for an on-board liquid hydrogen system. Background Technology

[0002] Liquid hydrogen, as an efficient and clean energy source, can be used in the automotive industry, providing power for vehicles. The onboard liquid hydrogen storage and supply system, a key system for liquid hydrogen vehicles, typically includes a liquid hydrogen container and external piping systems, instruments, controllers, communication modules, and valves. Because these pipelines are dispersed, they occupy a significant amount of space, have a complex structure, and are difficult to install and maintain. Furthermore, the controllers and communication modules are located in the hydrogen environment of the pipelines and valves used to transport hydrogen, posing a safety hazard of explosion under low temperature and vibration conditions. Utility Model Content

[0003] In view of this, the present invention provides an instrument valve box assembly for an on-board liquid hydrogen system to solve the problems of dispersed pipeline installation, which occupies a lot of space, and the safety hazard of explosion posed by the controller and communication module being in a hydrogen environment.

[0004] This utility model provides an instrument valve box assembly for an on-board liquid hydrogen system, comprising:

[0005] The enclosure is equipped with a main air inlet pipe, which is adapted to be connected to a liquid hydrogen container.

[0006] The piping system is located inside the enclosure and consists of multiple compactly arranged pipes, each of which is connected to the main intake pipe.

[0007] The explosion-proof box is fixedly connected to the outer wall of the enclosure, and the interior of the explosion-proof box is suitable for installing control and communication modules.

[0008] Beneficial effects: Multiple pipelines are connected to the liquid hydrogen container through the main inlet pipe, reducing the connection points between the pipeline system and the liquid hydrogen container, thereby improving the convenience of disassembly and maintenance; and by wrapping the control and communication module with an explosion-proof box, the control and communication module is isolated from the hydrogen environment, which helps to reduce the safety hazards of explosion in low temperature and vibration environments.

[0009] In one alternative embodiment, the housing adopts a titanium alloy-carbon fiber sandwich structure, wherein the titanium alloy layer is the outer layer, the carbon fiber layer is the middle layer, and the honeycomb aluminum plate is the core material.

[0010] Beneficial effects: The enclosure adopts a titanium alloy-carbon fiber sandwich structure, which, compared with a metal structure, helps to improve impact resistance while reducing the weight of the enclosure.

[0011] In one alternative embodiment, the porosity of the honeycomb aluminum panel is 65%-75%.

[0012] Beneficial effects: By setting the porosity of the honeycomb aluminum panel to 65%-75%, it is possible to achieve lightweighting without sacrificing necessary mechanical properties.

[0013] In one alternative embodiment, the explosion-proof box includes a first housing fixedly connected to the outer wall of the box, and a second housing detachably connected to the first housing, with an accommodating space for installing a control communication module formed between the first housing and the second housing.

[0014] Beneficial effects: The detachable connection between the first and second housings facilitates the installation and maintenance of components such as control and communication modules within the accommodating space.

[0015] In one optional embodiment, a sealing structure is provided between the contact surfaces of the first housing and the second housing. The sealing structure includes a fluororubber sealing ring and a copper sealing gasket, with the fluororubber sealing ring located on the side of the copper sealing gasket facing the accommodating space.

[0016] Beneficial effects: By constructing a dual-layer sealing structure of soft and hard materials, the sealing effect between the contact surfaces of the first and second housings is improved.

[0017] In one alternative embodiment, an air collecting column is provided between the intake manifold and the piping system, and multiple pipelines are adapted to be connected to the intake manifold through the air collecting column, with a pressure gauge installed on the air collecting column.

[0018] Beneficial effect: By installing a pressure gauge, personnel can visually observe and know the pressure inside the intake manifold.

[0019] In one alternative embodiment, the enclosure is further provided with a ventilation structure, which includes ventilation holes, and at least one side wall of the enclosure has a through ventilation hole.

[0020] Beneficial effects: By setting up a ventilation structure, the heat generated by components such as solenoid valves inside the chamber can be dissipated in a timely manner, and the hydrogen concentration inside the chamber can be prevented from becoming too high.

[0021] In one alternative implementation, a filter screen is provided at the ventilation opening.

[0022] Beneficial effects: By setting up a filter to reduce the entry of dust and other particles into the enclosure, and to prevent small animals and larger foreign objects from entering the enclosure, the internal components and structure of the enclosure are protected.

[0023] In one alternative embodiment, a valve assembly is provided on the piping system, and there is a gap between the piping system and the valve assembly and the bottom wall of the housing.

[0024] Beneficial effect: By maintaining a certain distance between the valve assembly and piping system and the bottom wall of the enclosure, air can be prevented from coming into contact with the low-temperature piping, forming droplets that fall and accumulate at the bottom of the enclosure, thus affecting the normal operation of the valve assembly and piping system.

[0025] In one alternative implementation, a flexible pad is provided on the inner wall of the box.

[0026] Beneficial effects: By incorporating flexible pads, the components and structure inside the enclosure can be protected in vibrating environments. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an instrument valve box assembly for an on-board liquid hydrogen system according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0030] Figure 3 for Figure 1 The diagram shows a three-dimensional structure of the instrument valve box assembly concealed within the onboard liquid hydrogen system. Figure 1 ;

[0031] Figure 4 for Figure 1 The diagram shows a three-dimensional structure of the instrument valve box assembly concealed within the onboard liquid hydrogen system. Figure 2 ;

[0032] Figure 5 for Figure 1 The diagram shows a three-dimensional structure of the instrument valve box assembly concealed within the onboard liquid hydrogen system. Figure 3 ;

[0033] Figure 6 for Figure 2 The diagram shows a three-dimensional structural schematic of the second shell.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Housing; 2. Main intake pipe; 3. Explosion-proof box; 31. First housing; 32. Second housing; 4. Gas collecting column; 5. Pressure gauge; 6. Ventilation hole; 71. First pipeline; 72. Second pipeline; 73. Third pipeline; 74. Fourth pipeline; 8. Liquid hydrogen cylinder end cap; 9. Pressure sensor; 10. Safety valve; 11. Solenoid valve; 12. Manual valve; 13. Vacuum valve box; 131. Interface; 132. Return gas port; 14. First channel; 15. Second channel. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, in one aspect, an instrument valve box assembly for an on-board liquid hydrogen system is provided, comprising:

[0039] The container 1 is equipped with an air inlet manifold 2, which is adapted to be connected to a liquid hydrogen container.

[0040] The piping system is located inside the housing 1 and includes multiple compactly arranged pipes, which are connected to the main intake pipe 2.

[0041] The explosion-proof box 3 is fixedly connected to the outer wall of the enclosure 1, and the interior of the explosion-proof box 3 is suitable for installing a control and communication module.

[0042] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment has multiple pipelines connected to the liquid hydrogen container through the main air intake pipe 2, thereby reducing the connection points between the pipeline system and the liquid hydrogen container and improving the convenience of disassembly and maintenance; and by wrapping the control and communication module with an explosion-proof box 3, the control and communication module is isolated from the hydrogen environment, which helps to reduce the safety hazards of explosion in low temperature and vibration environments.

[0043] Specifically, one end of the intake manifold 2 is located inside the housing 1, and the other end extends out of the housing 1 and connects to the liquid hydrogen cylinder end cap 8 of the liquid hydrogen container, communicating with the inner cavity inside the liquid hydrogen container used to contain liquid hydrogen. The explosion-proof box 3 is made of high-strength aluminum alloy. The bottom of the housing 1 is provided with multiple bolt holes for fixing to the vehicle chassis with high-strength bolts.

[0044] The piping system includes a first pipe 71, a second pipe 72, a third pipe 73, and a fourth pipe 74. One end of the first pipe 71 is connected to the main intake pipe 2, and the other end is connected to the self-pressurizing vaporizer of the on-board liquid hydrogen storage and supply system to pressurize the entire on-board liquid hydrogen system. A solenoid valve 11 is installed on the first pipe 71 to control its opening and closing. One end of the second pipe 72 is connected to the main intake pipe 2, and the other end is connected to the fuel cell system of the liquid hydrogen vehicle to supply it with hydrogen. A solenoid valve 11 and a manual valve 12 are installed on the second pipe 72. The operating lever of the manual valve 12 protrudes outside the housing 1. If the solenoid valve 11 fails, the manual valve 12 can act as a physical barrier, allowing manual operation to disconnect the pipe to ensure redundancy and safety. The third pipe 73... One end of the third pipeline 74 is connected to the main inlet pipe 2, and the other end is connected to the interface 131 of the vacuum valve box 13. The interface 131 is connected to the return port 132 on the vacuum valve box 13. A one-way valve is provided at the return port 132 to prevent hydrogen from being discharged from the third pipeline under normal conditions. When adding hydrogen, the hydrogen gun will open the one-way valve to release pressure when the pressure in the liquid hydrogen cylinder is too high. One end of the fourth pipeline 74 is connected to the third pipeline 73, and the other end of the fourth pipeline 74 extends out of the box 1 to be suitable for communication with the outside atmosphere. A manual valve 12 is provided on the fourth pipeline 74. The operating rod of the manual valve 12 is exposed outside the box 1. Under normal circumstances, this manual valve 12 is in the closed state. In an emergency, it can be manually opened to release hydrogen into the outside atmosphere, thereby improving safety.

[0045] In one embodiment, the housing 1 adopts a titanium alloy-carbon fiber sandwich structure, wherein the titanium alloy layer is the outer layer, the carbon fiber layer is the middle layer, and the honeycomb aluminum plate is the core material.

[0046] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment adopts a titanium alloy-carbon fiber sandwich structure for the box body 1. Compared with the use of metal structures (such as stainless steel), it is beneficial to improve the impact resistance while reducing the weight of the box body 1.

[0047] In one embodiment, the porosity of the honeycomb aluminum panel is 65%-75%.

[0048] The instrument valve box assembly for an on-board liquid hydrogen system provided in this embodiment achieves lightweighting while avoiding sacrificing necessary mechanical properties by setting the porosity of the honeycomb aluminum plate to 65%-75%.

[0049] For example, in some embodiments, the porosity of the honeycomb aluminum panel can be 65%, 67%, 69%, 70%, 72%, 73%, or 75%, or it can be a range formed by any two of the above values.

[0050] In one embodiment, combined Figure 1 and Figure 2 As shown, the explosion-proof box 3 includes a first housing 31 fixedly connected to the outer wall of the box body 1, and a second housing 32 detachably connected to the first housing 31. An accommodating space for installing a control communication module is formed between the first housing 31 and the second housing 32.

[0051] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment is detachably connected to the first housing 31 and the second housing 32 to facilitate the installation and maintenance of components such as the control and communication module within the accommodating space.

[0052] Specifically, the first housing 31 and the second housing 32 are engaged to form an accommodating space for installing the control communication module, and the first housing 31 and / or the second housing 32 are provided with sealed joints for cables to pass through the accommodating space.

[0053] In one embodiment, a sealing structure is provided between the contact surfaces of the first housing 31 and the second housing 32. The sealing structure includes a fluororubber sealing ring and a copper sealing gasket, with the fluororubber sealing ring located on the side of the copper sealing gasket facing the accommodating space.

[0054] The instrument valve box assembly for an on-board liquid hydrogen system provided in this embodiment improves the sealing effect between the contact surfaces of the first housing 31 and the second housing 32 by constructing a double-layered sealing structure of soft and hard materials.

[0055] Specifically, in combination Figure 6 As shown, at least one of the contacting end faces of the first housing 31 and the second housing 32 has a first groove 14 and a second groove 15. The first groove 14 is used to engage a copper sealing gasket, and the second groove 15 is used to engage a fluororubber sealing ring. The first groove 14 is arranged around the second groove 15 on the side away from the accommodating space. By engaging the copper sealing gasket and the fluororubber sealing ring with the first groove 14 and the second groove 15 respectively, the installation stability of the copper sealing gasket and the fluororubber sealing ring is improved.

[0056] In one embodiment, combined Figures 3 to 5 As shown, an air collecting column 4 is provided between the intake manifold 2 and the pipeline system. Multiple pipelines are adapted to be connected to the intake manifold 2 through the air collecting column 4. A pressure gauge 5 is provided on the air collecting column 4.

[0057] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment includes a pressure gauge 5, which allows personnel to visually observe the pressure inside the intake manifold 2.

[0058] Specifically, the dial of pressure gauge 5 is exposed outside the housing 1. The main inlet pipe 2 is connected to the gas collecting column 4. The first pipe 71, the second pipe 72, and the third pipe 73 are respectively connected to the gas collecting column 4, and then connected to the main inlet pipe 2 via the gas collecting column 4. A pressure sensor 9 is installed on the gas collecting column 4 to detect the pressure inside the column. The pressure sensor 9 is electrically connected to the control communication module via a cable, which passes through a sealed connector into the explosion-proof box 3 to transmit the detected pressure information to the control communication module. At least one safety valve 10 is also installed on the gas collecting column 4. The outlet of the safety valve 10 is exposed outside the housing 1. When the pressure inside the gas collecting column 4 or the liquid hydrogen cylinder exceeds a preset value, the safety valve 10 activates to discharge hydrogen, thereby reducing the pressure inside the gas collecting column 4 or the liquid hydrogen cylinder and improving safety.

[0059] In one embodiment, combined Figure 1 As shown, the housing 1 is also provided with a ventilation structure, which includes ventilation holes 6. At least one side wall of the housing 1 has ventilation holes 6 through it.

[0060] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment has a ventilation structure to facilitate the timely dissipation of heat generated by components such as the solenoid valve 11 inside the box 1, and to prevent the hydrogen concentration inside the box 1 from becoming too high.

[0061] Specifically, the ventilation holes 6 are strip-shaped, and there are multiple ventilation holes 6. The ventilation structure also includes a fan, which is disposed corresponding to the ventilation holes 6 to drive airflow through the ventilation holes, thereby improving the ventilation efficiency of the housing 1. Preferably, the fan is disposed on the side wall of the housing 1 on the side of the vehicle's travel direction.

[0062] In one embodiment, a filter screen is provided at the ventilation hole 6.

[0063] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment uses a filter to reduce the entry of dust and other particulate matter into the box 1, and prevents small animals and larger foreign objects from entering the box 1, thereby protecting the components and structure inside the box 1.

[0064] In one embodiment, combined Figures 3 to 5 As shown, valve assemblies are installed on the piping system, and there is a gap between the piping system and the valve assemblies and the bottom wall of the housing 1.

[0065] The instrument valve box assembly for the vehicle-mounted liquid hydrogen system provided in this embodiment has a certain distance between the valve assembly and the piping system and the bottom wall of the box 1, so as to prevent air from coming into contact with the low temperature piping and forming droplets that drip and collect at the bottom of the box 1, thus affecting the normal operation of the valve assembly and the piping system.

[0066] Specifically, due to the extremely low temperature of liquid hydrogen (approximately -253°C), the piping system used to connect to the liquid hydrogen container to transport hydrogen is also at a very low temperature. When air comes into contact with the cryogenic piping, condensation droplets form. These droplets cannot vaporize in time and will drip and accumulate at the bottom of the housing 1. By maintaining a certain distance between the valve assembly and piping system and the bottom wall of the housing 1, time is allowed for the droplets to vaporize. The valve assembly includes the aforementioned solenoid valve 11 and manual valve 12, etc. Preferably, the distance between the bottom wall of the housing 1 and the valve assembly and piping system is 3cm-5cm.

[0067] In one embodiment, a flexible pad is provided on the inner wall of the housing 1.

[0068] The instrument valve box assembly for an on-board liquid hydrogen system provided in this embodiment uses a flexible pad to protect the components and structure inside the box 1 in a vibration environment.

[0069] Specifically, the flexible pad is made of materials such as rubber or polyimide foam. In a vibration environment, the flexible pad is used to prevent the components and structures inside the enclosure 1 from rigidly colliding with the enclosure 1, thereby reducing damage to the enclosure 1 and its internal components and structures.

[0070] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. An instrument valve box assembly for an onboard liquid hydrogen system, characterized in that, include: A housing (1) is provided with an air inlet manifold (2), which is adapted to be connected to a liquid hydrogen container; A piping system is installed inside the housing (1). The piping system includes multiple compactly arranged pipes, which are respectively connected to the main intake pipe (2). An explosion-proof box (3) is fixedly connected to the outer wall of the box body (1), and the interior of the explosion-proof box (3) is suitable for installing a control communication module.

2. The instrument valve box assembly for an on-board liquid hydrogen system according to claim 1, characterized in that, The box (1) adopts a titanium alloy-carbon fiber sandwich structure, wherein the titanium alloy layer is the outer layer, the carbon fiber layer is the middle layer, and the honeycomb aluminum plate is the core material.

3. The instrument valve box assembly for an on-board liquid hydrogen system according to claim 2, characterized in that, The porosity of the honeycomb aluminum panel is 65%-75%.

4. The instrument valve box assembly for an on-board liquid hydrogen system according to claim 1, characterized in that, The explosion-proof box (3) includes a first housing (31) fixedly connected to the outer wall of the box body (1) and a second housing (32) detachably connected to the first housing (31). An accommodating space for installing the control communication module is formed between the first housing (31) and the second housing (32).

5. The instrument valve box assembly for an on-board liquid hydrogen system according to claim 4, characterized in that, A sealing structure is provided between the contact surfaces of the first housing (31) and the second housing (32). The sealing structure includes a fluororubber sealing ring and a copper sealing gasket. The fluororubber sealing ring is located on the side of the copper sealing gasket facing the accommodating space.

6. The instrument valve box assembly for an onboard liquid hydrogen system according to claim 1, characterized in that, An air collecting column (4) is provided between the main air intake pipe (2) and the pipeline system. Multiple pipelines are adapted to be connected to the main air intake pipe (2) through the air collecting column (4). A pressure gauge (5) is provided on the air collecting column (4).

7. The instrument valve box assembly for an onboard liquid hydrogen system according to claim 1, characterized in that, The housing (1) is also provided with a ventilation structure, which includes a ventilation hole (6), and the ventilation hole (6) is provided through at least one side wall of the housing (1).

8. The instrument valve box assembly for an onboard liquid hydrogen system according to claim 7, characterized in that, A filter screen is installed at the ventilation hole (6).

9. The instrument valve box assembly for an on-board liquid hydrogen system according to claim 1, characterized in that, The pipeline system is equipped with a valve assembly, and there is a gap between the pipeline system and the valve assembly and the bottom wall of the box (1).

10. The instrument valve box assembly for an onboard liquid hydrogen system according to any one of claims 1 to 9, characterized in that, The inner wall of the box (1) is provided with a flexible pad.

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