Heat insulation device for liquid hydrogen storage tank

Abstract

The heat insulation device for the liquid hydrogen storage tank comprises a device base, a protection mechanism, an air cooling mechanism, a fire fighting mechanism and a driving device.An installation area is arranged on the upper portion of the device base, a motorized cavity is formed in the bottom of the device base, and the positions, located on the two sides of the installation area, of the device base are each rotationally connected with a set of protection covers; the device base is provided with a rotating component matched with the protective cover in a covering mode, a driving component is arranged in the motorized cavity and is in power connection with the rotating component, a driving device is fixedly connected in the motorized cavity, and in addition, an air cooling mechanism is arranged in the motorized cavity and is matched with the cooling cavity. In addition, a fire fighting mechanism is arranged in the maneuvering chamber, and the fire fighting mechanism is matched with the cooling cavity, so that the fire fighting mechanism can fill the cooling cavity with a fire fighting medium. The invention relates to the technical field of liquid hydrogen storage tank protection, and the safety of the liquid hydrogen storage tank can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid hydrogen storage tank protection, in particular to a heat insulation device for a liquid hydrogen storage tank. Background Art

[0002] As a high energy density, low temperature liquid fuel, liquid hydrogen is widely used in aerospace, energy storage, liquefied natural gas transportation and other fields. Due to its extremely low boiling point (-253°C), liquid hydrogen must be kept at a very low temperature during storage and transportation to maintain its liquid state. However, the storage and transportation of liquid hydrogen has high safety risks, which are mainly reflected in the following aspects: 1. During the transportation of liquid hydrogen, the storage tank is directly exposed to the outside world. In this way, the storage tank may encounter collisions, bumps or other external impacts. These external impacts may cause damage to the surface or structure of the storage tank, and may even cause leakage of liquid hydrogen. If the storage tank collides during transportation, especially direct impact on the surface of the liquid hydrogen storage tank, it may cause cracks or damage on the surface of the storage tank, increasing the risk of liquid hydrogen leakage. Once liquid hydrogen leaks, it will form an extremely flammable mixed gas when it comes into contact with oxygen in the air, which may cause fire or explosion in severe cases; 2. During transportation, liquid hydrogen storage tanks are directly exposed to high temperature environments, such as direct sunlight and high temperatures in summer. Drastic changes in temperature will affect the temperature of the liquid hydrogen in the tank. The evaporation rate of liquid hydrogen is closely related to temperature. If the temperature of the tank rises, liquid hydrogen may evaporate faster, causing the internal pressure of the tank to increase. Especially in the absence of good thermal insulation protection, high temperature environments can easily make the temperature of the liquid hydrogen tank unstable, thereby increasing the risk of leakage or explosion; 3. Existing liquid hydrogen storage tanks are directly exposed to the outside world. In the event of a leak, there is a lack of effective emergency fire extinguishing and leakage control measures, which can easily lead to catastrophic accidents such as fire and explosion; Therefore, how to design a device that can effectively protect liquid hydrogen storage tanks from external impacts, heat sources, corrosion and environmental factors, while providing complete fire protection and temperature control functions has become a technical problem that needs to be urgently solved in the field of liquid hydrogen storage and transportation. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a thermal insulation device that can improve the safety of liquid hydrogen storage tanks.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a heat insulation device for a liquid hydrogen storage tank, comprising a device base, a protection mechanism, an air cooling mechanism, a fire fighting mechanism and a driving device, wherein an installation area is provided on the upper part of the device base, and the installation area is used to fix and install the liquid hydrogen storage tank, and a motor chamber is provided at the bottom of the device base; The protection mechanism is provided on the base of the device, and the protection mechanism includes a protection cover, a rotating component, and a driving component. A group of the protection cover is rotatably connected on both sides of the installation area of ​​the device base, and the rotating component is provided on the device base to cooperate with the protection cover. The driving component is provided in the motor chamber, and the driving component is connected to the rotating component by power. The driving device is fixedly connected in the motor chamber, and the driving device is connected to the driving component by power. The driving device can transmit power to the driving component, and the driving component transmits power to the rotating component, so that two groups of the protection cover can be rotated to merge or open. When the two groups of the protection cover are merged, a cooling chamber is provided between the protection cover and the liquid hydrogen storage tank; The motor chamber is provided with the air cooling mechanism, and the air cooling mechanism cooperates with the cooling cavity so that the air cooling mechanism can cool the air in the cooling cavity; The fire-fighting mechanism is arranged in the motor chamber, and cooperates with the cooling chamber so that the fire-fighting mechanism can fill the cooling chamber with a fire-fighting medium.

[0005] In the above technical solution, the rotating component adopts the following structure: The rotating parts include a rotating shaft, a worm wheel A, a worm A, a gear and a rack. Each set of the protective cover is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the base of the device; The same end of the two groups of rotating shafts passes through the device base and is fixedly connected to the worm gear A. The device base is rotatably connected to a transmission shaft. The transmission shaft is fixedly connected to a worm A corresponding to each group of worm gears A. The worm A is meshingly connected with the worm gear A. The transmission shaft is fixedly connected to the gear. The rack is slidably connected to the gear in the motor chamber; The driving component cooperates with the rack so that the driving component can drive the rack to perform linear motion.

[0006] In the above technical solution, the driving component adopts the following structure: The driving component includes a sliding column, a reciprocating screw, a moving platform and a traction arm, the sliding column is fixedly connected in the motor chamber, the moving platform is slidably connected on the sliding column, the reciprocating screw is threadedly connected on the moving platform, the traction arm is fixedly connected on the moving platform, and the traction arm is fixedly connected to the rack; The driving device and the reciprocating screw are connected to each other through a transmission assembly A.

[0007] In the above technical solution, the specific structure of the air cooling mechanism is: The air cooling mechanism includes an air refrigeration box, a refrigerator, and an unpowered circulation pump. The motor chamber is fixedly connected with the air refrigeration box, and the air refrigeration box is fixedly connected with the refrigerator. The air in the air refrigeration box can be cooled by the refrigerator. The unpowered circulation pump is fixedly connected in the motor chamber, the air inlet of the unpowered circulation pump is connected to the air refrigeration box through a pipe A, the air outlet of the unpowered circulation pump is connected to the cooling chamber through a pipe B, and the cooling chamber is connected to the air refrigeration box through a pipe C; The driving device and the unpowered circulation pump are connected to each other through the transmission assembly B, so that the driving device can drive the unpowered circulation pump to work and realize the air circulation flow between the cooling chamber and the air refrigeration box.

[0008] In the above technical solution, the structure of the transmission assembly is as follows: The transmission assembly A comprises a transmission main shaft, a worm wheel B, a worm B, and a ratchet assembly A. The reciprocating screw is fixedly connected to a power input shaft A, the power input shaft A is fixedly connected to the worm wheel B, the motor chamber is rotatably connected to a power input shaft B, the power input shaft B is fixedly connected to the worm B, the worm B is meshed with the worm wheel B, and the power input shaft B is provided with the ratchet assembly A; The power output end of the driving device is fixedly connected to the transmission main shaft, and the transmission main shaft is power-connected to the power input shaft B. When the driving device drives the transmission main shaft to rotate in the forward direction, under the action of the ratchet assembly A, the worm B drives the worm wheel B to rotate. When the driving device drives the transmission main shaft to rotate in the reverse direction, under the action of the ratchet assembly A, the worm B does not rotate.

[0009] In the above technical solution, the structure of the transmission assembly B is as follows: The transmission assembly B includes a ratchet assembly B and a pump shaft A. The pump shaft A is provided on the unpowered circulation pump, and the ratchet assembly B is provided on the pump shaft A. The pump shaft A is dynamically connected to the transmission main shaft. When the transmission main shaft rotates forward, the pump shaft does not rotate under the action of the ratchet assembly B. When the transmission main shaft rotates reversely, the pump shaft rotates under the action of the ratchet assembly B.

[0010] In the above technical solution, the fire fighting mechanism adopts the following structure: The firefighting mechanism includes a foam storage tank, an unpowered fire pump, an electric control valve and a disconnection component. The foam storage tank is fixedly connected to the motor chamber, and firefighting foam is stored in the foam storage tank. The unpowered fire pump is also fixedly connected to the motor chamber, and the outlet of the unpowered fire pump is connected to the foam storage tank through a pipeline D, and the electric control valve is provided on the pipeline D. The outlet of the unpowered fire pump is connected to the cooling chamber through a pipeline E; The unpowered fire pump is provided with a pump shaft B, which is dynamically connected to the main transmission shaft, and the pump shaft B is provided with the on-off component, which can realize the on and off of the power transmitted from the main transmission shaft to the pump shaft B.

[0011] In the above technical solution, the disconnection component can be implemented by the following structure: The disconnecting and connecting components include an electromagnet, an adsorption disk, a spring and a moving column. The pump shaft B includes a power input shaft C and a power input shaft D. The power input shaft C is connected to the power of the unpowered fire pump, and the power input shaft D is connected to the power of the transmission main shaft. The end of the power input shaft C is fixedly connected to the electromagnet, and a limiting disk is fixedly connected to the power input shaft D. A plurality of groups of moving columns are slidably connected to the limiting disk, and the ends of the plurality of groups of moving columns are fixedly connected to the adsorption disk, and the adsorption disk is close to the electromagnet. The moving column is sleeved with the spring, one end of the spring is fixedly connected to the adsorption disk, and the other end is fixedly connected to the limiting disk.

[0012] In the above technical solution, in order to ensure strength and heat insulation effect, the protective cover is composed of an inner metal layer, a buffer layer, a heat insulation layer, and an outer metal layer from the outside to the inside, and multiple groups of reinforcing ribs are fixedly connected to the outer wall of the outer metal layer.

[0013] In the above technical solution, in order to realize automatic cooling and fire control, it also has the following structure: A temperature sensor and a hydrogen detection sensor are fixedly connected in the cooling chamber, and a controller is fixedly connected in the motorized chamber. The temperature sensor, hydrogen detection sensor, refrigerator, electric control valve, electromagnet and driving device are all electrically connected to the controller, so that the temperature sensor can detect the temperature in the cooling chamber in real time, the hydrogen detection sensor can detect the hydrogen content in the cooling chamber in real time, and the controller can control the operation of the driving device, electromagnet and electric control valve according to the detected temperature or hydrogen content.

[0014] Beneficial effects of the present invention: 1. The driving device can provide power to the driving component, so that the driving component transmits the power to the rotating component, and the rotating component can drive the two sets of protective covers to rotate, so that the two sets of protective covers cover the liquid hydrogen storage tank, which can provide a physical barrier for the liquid hydrogen storage tank, effectively isolate the external impact force, prevent external objects or collisions from directly damaging the surface or structure of the storage tank, and improve the safety of the liquid hydrogen storage tank. The protective cover can effectively isolate external heat sources (such as high temperature climate, solar radiation, etc.), prevent heat from entering the storage tank, maintain the low temperature state of liquid hydrogen, and reduce the evaporation of liquid hydrogen or the increase in temperature. Furthermore, the protective cover can effectively prevent external environmental factors such as rain, dust, and corrosive gases from directly contacting the surface of the storage tank, reduce corrosion and contamination of the surface of the storage tank, and thus extend the service life of the storage tank. In addition, if a leak or accident occurs in the liquid hydrogen storage tank, the protective cover will help limit the spread of the leaked gas, reduce the risk area during the leak, and increase the safety of personnel and equipment; In summary, by covering the liquid hydrogen storage tank with a protective cover, the impact resistance, thermal insulation and corrosion resistance can be effectively improved, the impact of the external environment on the storage tank can be reduced, and additional safety protection measures can be provided to ensure the safety and stability of liquid hydrogen storage. This not only increases the service life of the storage tank, but also reduces possible safety hazards, especially in the high-risk liquid hydrogen storage and transportation process; 2. An air cooling mechanism is also provided. When the two sets of protective covers cover the liquid hydrogen storage tank, a cooling cavity is provided between the protective covers and the liquid hydrogen storage tank. The air between the cooling cavity is cooled by the air cooling mechanism, so that the liquid hydrogen storage tank is kept in a low temperature environment, which can alleviate the impact of external temperature fluctuations on the liquid hydrogen storage tank, keep the temperature inside the tank stable, reduce the risk of liquid hydrogen evaporation or temperature rise, and effectively maintain the stable state of liquid hydrogen to ensure safe storage; 3. There is also a fire-fighting mechanism, which can fill the cooling chamber with fire-fighting medium (foam) when a leak occurs in the liquid hydrogen storage tank, so as to quickly suppress the fire source, reduce the risk of fire and explosion, reduce the spread of leaked gas, and enhance overall safety; 4. The device can provide the required power for the driving components, air cooling mechanism and fire fighting mechanism through a set of driving devices, thereby greatly reducing the power source of the device, making the overall failure rate of the device lower and maintenance and repair more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of another state of the present invention; Figure 3 This is a schematic diagram of the internal structure of the motor chamber in the present invention; Figure 4It is a schematic diagram of the structure of the protective cover in the present invention; Figure 5 It is a schematic diagram of the coordination structure of the rotating component, the driving component and the driving device in the present invention; Figure 6 It is a structural schematic diagram of the air cooling mechanism in the present invention; Figure 7 It is a structural schematic diagram of the fire fighting mechanism in the present invention; Figure 8 for Figure 7 Schematic diagram of the detailed structure of part a in the middle; Fig. 9 It is a schematic diagram of the structure of power transmission of the driving device in the present invention.

[0016] In the figure: 100 device base, 101 installation area, 102 motor chamber; 200 protection mechanism, 201 protection cover, 2011 inner metal layer, 2012 buffer layer, 2013 heat insulation layer, 2014 outer metal layer, 2015 reinforcement rib, 202 rotating component, 2021 rotating shaft, 2022 worm wheel A, 2023 worm A, 2024 gear, 2025 rack, 203 driving component, 2031 sliding column, 2032 reciprocating screw, 2033 moving table, 2034 traction arm, 204 transmission shaft; 300 air cooling mechanism, 301 air refrigeration box, 302 refrigerator, 303 unpowered circulation pump, 304 pipeline A, 305 pipeline B, 306 pipeline C; 400 fire fighting mechanism, 401 foam storage tank, 402 non-powered fire fighting pump, 403 electric control valve, 405 pipeline E, 406 disconnection component, 4061 electromagnet, 4062 adsorption plate, 4063 spring, 4064 motion column, 4065 limit plate, 407 pump shaft B, 4071 power input shaft C, 4072 power input shaft D; 500 drive unit; 600 transmission assembly A, 601 transmission main shaft, 602 worm wheel B, 603 worm B, 604 ratchet assembly A, 605 power input shaft B, 606 power input shaft A; 700 transmission assembly B, 701 ratchet assembly B, 702 pump shaft A. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1

[0019] See also Figure 1 , Figure 2 , Figure 3 A heat insulation device for a liquid hydrogen storage tank includes a device base 100, a protection mechanism 200, an air cooling mechanism 300, a fire fighting mechanism 400 and a driving device 500. Firstly, an installation area 101 is provided on the upper part of the device base 100, and the installation area 101 is used for fixing and installing the liquid hydrogen storage tank, and a motor chamber 102 is provided at the bottom of the device base 100; Secondly, a protection mechanism 200 is provided on the device base 100, and the protection mechanism 200 is mainly used to protect the liquid hydrogen storage tank. Specifically, the protection mechanism 200 includes a protection cover 201, a rotating component 202, and a driving component 203, that is, a group of protection covers 201 are rotatably connected on both sides of the installation area 101 on the device base 100, and a rotating component 202 is provided on the device base 100 to cooperate with the protection cover 201. A driving component 203 is provided in the motor chamber 102, and the driving component 203 is connected to the rotating component 202 by power. A driving device 500 is fixedly connected in the motor chamber 102, and the driving device 500 is connected to the driving component 203 by power, so that the driving device 500 can transmit power to the driving component 203, and then the driving component 203 transmits power to the rotating component 202, so that the two groups of protection covers 201 are rotated to merge or open; When the two sets of protective covers 201 are combined to cover the liquid hydrogen storage tank, a physical barrier can be provided for the liquid hydrogen storage tank, effectively isolating external impact forces, preventing external objects or collisions from directly damaging the surface or structure of the storage tank, and improving the safety of the liquid hydrogen storage tank. The protective cover 201 can effectively isolate external heat sources (such as high temperature climate, solar radiation, etc.), prevent heat from entering the storage tank, maintain the low temperature state of liquid hydrogen, and reduce the evaporation of liquid hydrogen or the increase in temperature. Furthermore, the protective cover 201 can effectively prevent external environmental factors such as rain, dust, and corrosive gases from directly contacting the surface of the storage tank, reducing corrosion and contamination of the surface of the storage tank, thereby extending the service life of the storage tank. In addition, if a leak or accident occurs in the liquid hydrogen storage tank, the protective cover 201 helps to limit the spread of the leaked gas, reduce the risk area during the leak, and increase the safety of personnel and equipment. In summary, by covering the liquid hydrogen storage tank with the protective cover 201, the impact resistance, heat insulation performance and corrosion resistance can be effectively improved, the impact of the external environment on the storage tank can be reduced, and additional safety protection measures can be provided to ensure the safety and stability of liquid hydrogen storage, which not only increases the service life of the storage tank, but also reduces possible safety hazards, especially in the high-risk liquid hydrogen storage and transportation process; Furthermore, when the two sets of protective covers 201 are combined, a cooling cavity is provided between the protective cover 201 and the liquid hydrogen storage tank, and the motorized chamber 102 is provided with an air cooling mechanism 300, which cooperates with the cooling cavity so that the air cooling mechanism 300 can cool the air in the cooling cavity, thereby ensuring that the liquid hydrogen storage tank is in a low temperature environment, alleviating the impact of external temperature fluctuations on the liquid hydrogen storage tank, maintaining a stable temperature in the tank, reducing the risk of liquid hydrogen evaporation or temperature rise, and effectively maintaining a stable state of liquid hydrogen to ensure safe storage; In addition, a fire-fighting mechanism 400 is provided in the motorized chamber. The fire-fighting mechanism 400 cooperates with the cooling chamber so that the fire-fighting mechanism 400 can fill the cooling chamber with a fire-fighting medium. In this way, when a leak occurs in the liquid hydrogen storage tank, the fire-fighting medium (foam) can be filled into the cooling chamber, thereby quickly suppressing the fire source, reducing the risk of fire and explosion, and reducing the spread of leaked gas, thereby enhancing overall safety.

[0020] In this embodiment, please refer to Figure 4 , the protective cover 201 is composed of an inner metal layer 2011, a buffer layer 2012, a heat insulating layer 2013, and an outer metal layer 2014 from the outside to the inside. Here, the inner metal layer 2011 can be made of a low thermal conductivity material, such as aluminum foil or a silver-plated film, to reflect radiant heat, and the buffer layer 2012 can be made of a high-toughness material, such as polyurethane foam, rubber, EVA foam, etc., so that when the protective cover 201 is impacted, it can absorb the impact energy and avoid the impact on the liquid hydrogen storage tank, and the heat insulating layer 2013 can be made of a high-efficiency thermal insulation material, such as a multi-layer composite material (MLI), an aerogel composite material, or a vacuum interlayer, to prevent heat transfer and reduce heat flow. Finally, the outer metal layer 2014 can be made of an environmentally resistant, corrosion-resistant and high-strength material, such as a stainless steel, aluminum alloy or composite shell, and an anti-UV coating can be added; Furthermore, a plurality of groups of reinforcing ribs 2015 are fixedly connected to the outer wall of the outer metal layer 2014 to improve the impact resistance.

[0021] In this embodiment, please refer to Figure 3 , Figure 5The rotating component 202 includes a rotating shaft 2021, a worm wheel A2022, a worm A2023, a gear 2024 and a rack 2025, that is, each set of protective cover 201 is fixedly connected with a rotating shaft 2021, and the rotating shaft 2021 is rotatably connected to the device base 100, so that the protective cover 201 can rotate, and the same end of the two sets of rotating shafts 2021 passes through the device base 100 and is fixedly connected with a worm wheel A2022, and a transmission shaft 204 is rotatably connected to the device base 100, and a worm A2023 is fixedly connected to each set of worm wheels A2022 on the transmission shaft 204, and the worm A2023 and the worm wheel A2022 are connected. Meshing connection, a gear 2024 is fixedly connected to the transmission shaft 204, a rack 2025 is slidably connected near the gear 2024 in the motor chamber 102, and the driving component 203 cooperates with the rack 2025, so that the driving component 203 can drive the rack 2025 to perform linear motion, so that when the rack 2025 performs linear motion, the rack 2025 can drive the gear 2024 to rotate, and then the transmission shaft rotates, and finally the worm A2023 transmits the power to the worm wheel A2022, so that the rotation of the two sets of protective cover covers 201 can be realized. Such a structure uses the worm wheel and worm to achieve self-locking and deceleration and torque increase, ensuring the stable rotation of the protective cover cover 201; In addition, in this embodiment, please refer to Figure 3 , Figure 5 The driving component 203 includes a sliding column 2031, a reciprocating screw 2032, a moving platform 2033 and a traction arm 2034. The sliding column 2031 is fixedly connected in the motor chamber 102, and the moving platform 2033 is slidably connected to the sliding column 2031. The reciprocating screw 2032 is threadedly connected to the moving platform 2033. The traction arm 2034 is fixedly connected to the moving platform 2033. The traction arm 2034 is fixedly connected to the rack 2025, and the driving device 500 is connected to the reciprocating screw 2032 through the transmission component A600 to achieve power connection, that is, the driving device 500 can transmit power to the reciprocating screw 2032 through the transmission component A600. When the reciprocating screw 2032 rotates, the moving platform 2033 can slide linearly on the sliding column 2031, so that under the action of the traction arm 2034, the rack 2025 can be driven to move linearly.

[0022] Example 2

[0023] See also Figure 3 , Figure 6 , a heat insulation device for a liquid hydrogen storage tank, based on Example 1, this embodiment further states: The air cooling mechanism 300 includes an air refrigeration box 301, a refrigerator 302, and an unpowered circulation pump 303, that is, the air refrigeration box 301 is fixedly connected in the motor chamber 102, and the refrigerator 302 is fixedly connected to the air refrigeration box 301. The refrigerator 302 here can be a semiconductor refrigerator 302, and the air in the air refrigeration box 301 can be refrigerated by the refrigerator 302, and the unpowered circulation pump 303 is fixedly connected in the motor chamber 102, the air inlet of the unpowered circulation pump 303 is connected to the air refrigeration box 301 through a pipe A304, the air outlet of the unpowered circulation pump 303 is connected to the cooling chamber through a pipe B305, the cooling chamber is connected to the air refrigeration box 301 through a pipe C306, and the driving device 500 is connected to the unpowered circulation pump 303 through a transmission component B700 to achieve power connection, so that the driving device 500 can drive the unpowered circulation pump 303 to work, and realize the air circulation flow from the cooling chamber to the air refrigeration box 301; To avoid power interference between the air cooling mechanism 300 and the protection mechanism 200, please refer to Figure 5 , Figure 6 , Fig. 9 The transmission assembly A600 includes a transmission main shaft 601, a worm wheel B602, a worm B603, and a ratchet assembly A604. A power input shaft A606 is fixedly connected to the reciprocating screw 2032, and a worm wheel B602 is fixedly connected to the power input shaft A606. A power input shaft B605 is rotatably connected in the motor chamber 102, and a worm B603 is fixedly connected to the power input shaft B605. The worm B603 is meshingly connected with the worm wheel B602, and a ratchet assembly A604 is provided on the power input shaft B605. In addition, a power output end of the drive device 500 is fixedly connected to the transmission main shaft 601, and the transmission main shaft 601 is power-connected to the power input shaft B605. Specifically, two sets of bevel gears 2024 can be used to realize power transmission; When the driving device 500 drives the transmission shaft 601 to rotate in the forward direction, the worm B603 drives the worm wheel B602 to rotate under the action of the ratchet assembly A604. When the driving device 500 drives the transmission shaft 601 to rotate in the reverse direction, the worm B603 does not rotate under the action of the ratchet assembly A604. Furthermore, the transmission assembly B700 includes a ratchet assembly B701 and a pump shaft A702. The pump shaft A702 is provided on the unpowered circulation pump 303. The ratchet assembly B701 is provided on the pump shaft A702. The pump shaft A702 is connected to the transmission main shaft 601 in a power connection. When the transmission main shaft 601 rotates forward, the pump shaft A702 does not rotate under the action of the ratchet assembly B701. When the transmission main shaft 601 rotates reversely, the pump shaft A702 rotates under the action of the ratchet assembly B701.

[0024] Example 3

[0025] See also Figure 3 , Figure 7 , Fig. 9 , a heat insulation device for a liquid hydrogen storage tank, based on Example 2, this embodiment further states: The fire fighting mechanism 400 includes a foam storage tank 401, an unpowered fire pump 402, an electric control valve 403 and a disconnection component 406, wherein the foam storage tank 401 is fixedly connected in the motor chamber 102, and fire fighting foam is stored in the foam storage tank 401, and the unpowered fire pump 402 is also fixedly connected in the motor chamber 102, and the outlet of the unpowered fire pump 402 is connected to the foam storage tank 401 through a pipeline D, and the electric control valve 403 is provided on the pipeline D, and the outlet of the unpowered fire pump 402 is connected to the cooling chamber through a pipeline E405, and a pump shaft B407 is also provided on the unpowered fire pump 402, and the pump shaft B407 is connected to the transmission main shaft 6 01 Power connection, which can be specifically realized by using two sets of bevel gears 2024, and a disconnecting component 406 is provided on the pump shaft B407, which can realize the on and off of the power transmitted from the transmission main shaft 601 to the pump shaft B407. In this way, when firefighting operations are required, power connection can be achieved through the disconnecting component 406, and then the electric control valve 403 is opened, and the unpowered fire pump 402 is driven to work through the driving device 500. The foam stored in the foam storage box 401 is quickly pumped into the cooling chamber through the unpowered fire pump 402, so as to quickly suppress the fire source, reduce the risk of fire and explosion, and reduce the spread of leaked gas, thereby enhancing overall safety.

[0026] See also Figure 8 In this embodiment, the structure of the disconnecting component 406 is selected as follows: The disconnecting component 406 includes an electromagnet 4061, an adsorption disk 4062, a spring 4063 and a moving column 4064. The pump shaft B407 includes a power input shaft C4071 and a power input shaft D4072. The power input shaft C4071 is connected to the power of the unpowered fire pump 402, and the power input shaft D4072 is connected to the power of the transmission main shaft 601. The end of the power input shaft C4071 is fixedly connected with the electromagnet 4061, and the power input shaft D4072 is fixedly connected with a limiting disk 4065. The limiting disk 4065 is slidably connected with multiple groups of moving columns 4064. The ends of the multiple groups of moving columns 4064 are fixedly connected with the adsorption disk 4062, and the adsorption disk 4062 is close to the electromagnet 4061. The moving column 4064 is sleeved with a spring 4063, and one end of the spring 4063 is fixedly connected to the adsorption disk 4062, and the other end is fixedly connected to the limiting disk 4065. When power needs to be connected, the electromagnet 4061 is energized, so that the electromagnet 4061 can adsorb the adsorption disk 4062 and stretch the spring 4063. When the power is transmitted to the power input shaft D4072, the power can be transmitted to the power input shaft C4071 to realize the operation of the unpowered fire pump 402; When the power needs to be disconnected, the electromagnet 4061 is powered off. At this time, under the action of the spring 4063, the adsorption plate 4062 is separated from the electromagnet 4061.

[0027] In a further optimization of this embodiment, a temperature sensor and a hydrogen detection sensor are fixedly connected in the cooling chamber, and a controller is fixedly connected in the motor chamber 102; Among them, the temperature sensor can detect the temperature in the cooling chamber in real time; Among them, the hydrogen detection sensor can detect the hydrogen content in the cooling chamber in real time; The above-mentioned temperature sensor, hydrogen detection sensor, refrigerator 302, electric control valve 403, electromagnet 4061 and driving device 500 are all electrically connected to the controller, so that the controller can control the driving device 500, electromagnet 4061 and electric control valve 403 to work according to the detected temperature or hydrogen content. Specifically, when the detected temperature is higher than the set range, the controller can control the refrigerator 302 and the driving device 500 to work, and the driving device 500 drives the unpowered circulation pump 303 to work, so as to cool the air in the cooling chamber until the temperature reaches the required range and stops working; When the hydrogen detection sensor detects that the hydrogen content is higher than the set value or the temperature sensor detects that the temperature reaches the warning value, the controller can control the operation of the electric control valve 403, the electromagnet 4061 and the drive device 500, and the drive device 500 realizes the operation of the unpowered fire pump 402, so that the foam stored in the foam storage box 401 is quickly filled into the cooling chamber.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat insulation device for a liquid hydrogen storage tank, comprising a device base (100), a protection mechanism (200), an air cooling mechanism (300), a fire fighting mechanism (400) and a driving device (500), characterized in that: An installation area (101) is provided on the upper part of the device base (100), and the installation area (101) is used to fix and install a liquid hydrogen storage tank. A motor chamber (102) is provided at the bottom of the device base (100); The protective mechanism (200) is provided on the device base (100), and the protective mechanism (200) comprises a protective cover (201), a rotating component (202), and a driving component (203). A group of protective covers (201) are rotatably connected to both sides of the installation area (101) on the device base (100), and the rotating component (202) is provided on the device base (100) to cooperate with the protective cover (201). The driving component (203) is provided in the motor chamber (102), and the driving component (203) is connected to the The rotating component (202) is connected to the driving device (500) in a fixed manner in the motor chamber (102); the driving device (500) is connected to the driving component (203) in a power manner; the driving device (500) transmits power to the driving component (203); the driving component (203) transmits power to the rotating component (202), so that the two groups of the protective covers (201) are rotated to merge or open; when the two groups of the protective covers (201) are merged, a cooling chamber is provided between the protective covers (201) and the liquid hydrogen storage tank; The motor chamber (102) is provided with the air cooling mechanism (300), and the air cooling mechanism (300) cooperates with the cooling cavity so that the air cooling mechanism (300) cools the air in the cooling cavity; The fire-fighting mechanism (400) is arranged in the motor chamber (102), and the fire-fighting mechanism (400) cooperates with the cooling chamber so that the fire-fighting mechanism (400) fills the cooling chamber with a fire-fighting medium.

2. A heat insulation device for a liquid hydrogen storage tank according to claim 1, characterized in that: The rotating component (202) comprises a rotating shaft (2021), a worm wheel A (2022), a worm A (2023), a gear (2024), and a rack (2025); each set of the protective cover (201) is fixedly connected to the rotating shaft (2021); and the rotating shaft (2021) is rotatably connected to the device base (100); The same end of the two groups of rotating shafts (2021) passes through the device base (100) and is fixedly connected to the worm gear A (2022); the device base (100) is rotatably connected to a transmission shaft (204); a worm A (2023) is fixedly connected to the transmission shaft (204) corresponding to each group of worm gears A (2022); the worm A (2023) is meshingly connected to the worm gear A (2022); the transmission shaft (204) is fixedly connected to the gear (2024); and the rack (2025) is slidably connected to the gear (2024) in the motor chamber (102); The driving component (203) cooperates with the rack (2025), so that the driving component (203) drives the rack (2025) to perform linear motion.

3. A heat insulation device for a liquid hydrogen storage tank according to claim 2, characterized in that: The driving component (203) comprises a sliding column (2031), a reciprocating screw (2032), a moving platform (2033) and a traction arm (2034); the sliding column (2031) is fixedly connected in the motor chamber (102); the moving platform (2033) is slidably connected to the sliding column (2031); the reciprocating screw (2032) is threadedly connected to the moving platform (2033); the traction arm (2034) is fixedly connected to the moving platform (2033); and the traction arm (2034) is fixedly connected to the rack (2025); The driving device (500) and the reciprocating screw (2032) are connected in power via a transmission assembly A (600).

4. A heat insulation device for a liquid hydrogen storage tank according to claim 3, characterized in that: The air cooling mechanism (300) comprises an air refrigeration box (301), a refrigerator (302), and an unpowered circulation pump (303); the air refrigeration box (301) is fixedly connected to the motor chamber (102); the air refrigeration box (301) is fixedly connected to the refrigerator (302); and the air in the air refrigeration box (301) is cooled by the refrigerator (302); The unpowered circulation pump (303) is fixedly connected to the motor chamber (102); the air inlet of the unpowered circulation pump (303) is connected to the air refrigeration box (301) via a pipe A (304); the air outlet of the unpowered circulation pump (303) is connected to the cooling chamber via a pipe B (305); and the cooling chamber is connected to the air refrigeration box (301) via a pipe C (306); The driving device (500) and the unpowered circulation pump (303) are connected in power via a transmission assembly B (700), so that the driving device (500) drives the unpowered circulation pump (303) to work, thereby achieving air circulation between the cooling chamber and the air refrigeration box (301).

5. A heat insulation device for a liquid hydrogen storage tank according to claim 4, characterized in that: The transmission assembly A (600) comprises a transmission main shaft (601), a worm wheel B (602), a worm B (603), and a ratchet assembly A (604); a power input shaft A (606) is fixedly connected to the reciprocating screw (2032); the power input shaft A (606) is fixedly connected to the worm wheel B (602); a power input shaft B (605) is rotatably connected in the motor chamber (102); the power input shaft B (605) is fixedly connected to the worm B (603); the worm B (603) is meshingly connected to the worm wheel B (602); and the ratchet assembly A (604) is provided on the power input shaft B (605); The power output end of the driving device (500) is fixedly connected to the transmission main shaft (601), and the transmission main shaft (601) is power-connected to the power input shaft B (605). When the driving device (500) drives the transmission main shaft (601) to rotate in the forward direction, under the action of the ratchet assembly A (604), the worm B (603) drives the worm wheel B (602) to rotate; when the driving device (500) drives the transmission main shaft (601) to rotate in the reverse direction, the worm B (603) does not rotate.

6. A heat insulation device for a liquid hydrogen storage tank according to claim 5, characterized in that: The transmission assembly B (700) comprises a ratchet assembly B (701) and a pump shaft A (702). The pump shaft A (702) is provided on the unpowered circulation pump (303). The pump shaft A (702) is provided on the ratchet assembly B (701). The pump shaft A (702) is connected to the transmission main shaft (601) in a power connection. When the transmission main shaft (601) rotates in the forward direction, the pump shaft A (702) does not rotate under the action of the ratchet assembly B (701). When the transmission main shaft (601) rotates in the reverse direction, the pump shaft A (702) rotates.

7. A heat insulation device for a liquid hydrogen storage tank according to claim 6, characterized in that: The firefighting mechanism (400) comprises a foam storage tank (401), an unpowered fire pump (402), an electric control valve (403) and a disconnection component (406); the foam storage tank (401) is fixedly connected to the motor chamber (102); the foam storage tank (401) stores firefighting foam; the unpowered fire pump (402) is also fixedly connected to the motor chamber (102); the outlet of the unpowered fire pump (402) is connected to the foam storage tank (401) via a pipe D; the electric control valve (403) is provided on the pipe D; the outlet of the unpowered fire pump (402) is connected to the cooling chamber via a pipe E (405); The unpowered fire pump (402) is provided with a pump shaft B (407), the pump shaft B (407) is connected to the main transmission shaft (601) by power, and the pump shaft B (407) is provided with the on-off component (406), the on-off component (406) can realize the on and off of the power transmitted from the main transmission shaft (601) to the pump shaft B (407).

8. A heat insulation device for a liquid hydrogen storage tank according to claim 7, characterized in that: The disconnecting component (406) comprises an electromagnet (4061), an adsorption disk (4062), a spring (4063) and a motion column (4064); the pump shaft B (407) comprises a power input shaft C (4071) and a power input shaft D (4072); the power input shaft C (4071) is power-connected to the unpowered fire pump (402); the power input shaft D (4072) is power-connected to the transmission main shaft (601); the end of the power input shaft C (4071) is fixedly connected to the electromagnet (4061); A limit plate (4065) is fixedly connected to the force input shaft D (4072), a plurality of groups of motion columns (4064) are slidably connected to the limit plate (4065), the ends of the plurality of groups of motion columns (4064) are fixedly connected to the adsorption plates (4062), the adsorption plates (4062) are close to the electromagnet (4061), the motion columns (4064) are sleeved with the spring (4063), one end of the spring (4063) is fixedly connected to the adsorption plate (4062), and the other end is fixedly connected to the limit plate (4065).

9. The heat insulation device for a liquid hydrogen storage tank according to claim 1, characterized in that: The protective cover (201) comprises, from outside to inside, an inner metal layer (2011), a buffer layer (2012), a heat insulation layer (2013), and an outer metal layer (2014); a plurality of groups of reinforcing ribs (2015) are fixedly connected to the outer wall of the outer metal layer (2014).

10. The heat insulation device for a liquid hydrogen storage tank according to claim 8, characterized in that: A temperature sensor and a hydrogen detection sensor are fixedly connected in the cooling chamber, and a controller is fixedly connected in the motor chamber (102). The temperature sensor, the hydrogen detection sensor, the refrigerator (302), the electric control valve (403), the electromagnet (4061), and the drive device (500) are all electrically connected to the controller, so that the temperature sensor can detect the temperature in the cooling chamber in real time, and the hydrogen detection sensor can detect the hydrogen content in the cooling chamber in real time. The controller can control the operation of the drive device (500), the electromagnet (4061), and the electric control valve (403) according to the detected temperature or hydrogen content.

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