Hydrogen storage cylinder comprehensive test environment chamber and installation test method thereof

Abstract

The invention discloses a hydrogen storage cylinder comprehensive test environment chamber and an installation test method thereof, and the chamber comprises a first accommodation chamber which is used for accommodating and installing a hydrogen storage cylinder; the second accommodating cabin is used for accommodating and mounting the first accommodating cabin; the movable bearing mechanism is used for bearing and moving the first accommodating cabin to enable the first accommodating cabin to enter the second accommodating cabin; according to the hydrogen storage cylinder performance testing device, environmental parameters such as temperature, humidity and pressure in the first accommodating cabin and the second accommodating cabin can be regulated and controlled, so that a hydrogen storage cylinder is subjected to related tests such as an air pressure cycle test, a penetration test and a static pressure test in a simulation environment created by the first accommodating cabin and the second accommodating cabin, and accurate data of the performance of the hydrogen storage cylinder can be conveniently recorded; therefore, the comprehensive performance is improved in a targeted manner.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage bottle performance testing, and in particular relates to a comprehensive test environment chamber for hydrogen storage bottles and an installation and testing method thereof. Background Art

[0002] The automotive hydrogen storage cylinder test system is primarily used to evaluate the safety and reliability of onboard high-pressure hydrogen storage cylinders under various extreme conditions. With the rapid development of hydrogen fuel cell vehicles, hydrogen storage cylinders, as key energy storage components, have a direct impact on vehicle operational safety. Currently, the test system is primarily based on the national standard GB / T 35544-2017, "Automotive Compressed Hydrogen Cylinders with Aluminum Liners and Carbon Fiber Fully Wrapped," and the group standard T / CATSI 02 007-2020, "Automotive Compressed Hydrogen Cylinders with Plastic Liners and Carbon Fiber Fully Wrapped." These standards specify various type test requirements for hydrogen storage cylinders, including hydrostatic testing, air pressure cycling testing, penetration testing, static pressure testing, and burst testing. The test system is usually composed of multiple test devices to simulate the performance of hydrogen storage bottles under different conditions; however, there is currently no test equipment that can perform comprehensive testing under coupled environmental factors such as high temperature, low temperature, humidity, high and low air pressure, etc. Hydrogen storage bottles usually need to face the above-mentioned various environmental factors in actual use environments. Therefore, it is necessary to simulate the actual use environment to conduct comprehensive performance tests on hydrogen storage bottles in order to improve and enhance the performance of hydrogen storage bottles. Summary of the Invention

[0003] The purpose of the present invention is to provide a comprehensive test environment chamber for hydrogen storage bottles and an installation and testing method thereof, which can regulate environmental parameters such as temperature, humidity, and pressure in the first and second storage chambers, so that the hydrogen storage bottles can undergo water pressure tests, air pressure cycle tests, penetration tests, static pressure tests and other related tests in the simulated environment created by the first and second storage chambers, thereby facilitating the recording of accurate data on the performance of the hydrogen storage bottles and targeted improvement of their comprehensive performance.

[0004] The present invention is achieved through the following technical solutions: A comprehensive test environment chamber for hydrogen storage bottles, comprising: a first accommodating chamber, wherein the first accommodating chamber is used to accommodate and install a hydrogen storage bottle; a second accommodating compartment, the second accommodating compartment being used to accommodate and install the first accommodating compartment; The mobile carrying mechanism is used to carry and move the first accommodating chamber into the second accommodating chamber.

[0005] Furthermore, the outer sleeve of the hydrogen storage bottle is provided with at least two sets of buckle mechanisms, and the buckle mechanisms include a limit frame and multiple pulley assemblies. The limit frame is a ring structure, and the limit frame is provided on the hydrogen storage bottle. The pulley assemblies are arranged around the limit frame, and the angles between the pulley assemblies are equal. Fixing bolts are provided between adjacent pulley assemblies on the limit frame, and the fixing bolts pass through the limit frame and abut against the hydrogen storage bottle; the pulley assembly abuts against the inner side wall of the first storage compartment.

[0006] Furthermore, the pulley assembly includes two groups of connecting plates and two pulleys, the two groups of connecting plates are respectively arranged on the left and right sides of the limit frame, the pulleys are arranged between the same group of connecting plates through a rotating shaft, the top surfaces of the two pulleys are in the same horizontal plane, and the pulleys are protruded on the limit frame and abut against the inner side wall of the first accommodating chamber.

[0007] Furthermore, the first storage chamber and the second storage chamber are both provided with a convection heat exchange fan and a plurality of test interfaces. When the first storage chamber is in the second storage chamber, the convection heat exchange fan on the first storage chamber is close to the end of the second storage chamber; the test interface is arranged at the top of the first storage chamber and the second storage chamber.

[0008] Furthermore, at least one set of fixed hoisting feet is provided below the first accommodating chamber, and the fixed hoisting feet supports the first accommodating chamber.

[0009] Furthermore, the mobile carrying mechanism includes a support frame and a group of support legs, the support legs are hinged to the left and right sides of the support frame, and a locking assembly is provided on the support frame, and the locking assembly is used to lock the support legs; rollers are provided on the support frame and under the support frame.

[0010] Furthermore, the locking assembly includes: a locking block, a limit block, a locking pin and a spring, the limit block is arranged on one side of the locking block, the limit block is connected to the locking block, the limit block is provided with a mounting groove, the locking block is provided with a through hole, the mounting groove and the through hole are coaxially arranged, the locking pin is arranged in the through hole and can slide in the through hole and the mounting groove, the locking pin is provided with a pull rod, the pull rod extends from the bottom of the mounting groove of the limit block, the spring is sleeved on the pull rod and abuts against the locking pin and the bottom of the mounting groove; a locking hole is provided on the support leg, the locking hole is coaxially arranged with the through hole, and the end of the locking pin extends from the through hole and is inserted into the locking hole to lock the support leg.

[0011] Furthermore, a support platform is provided in the second accommodating chamber, and the movable carrying mechanism abuts against the support platform.

[0012] Furthermore, a plurality of support members are provided below the second accommodating compartment.

[0013] A method for installing and testing a comprehensive test environment chamber for a hydrogen storage bottle comprises the following steps: S1: Pre-install pit and overhead crane and lay embedded pipes; S2: Installing a buckle mechanism on the hydrogen storage bottle and sliding it into the first accommodation compartment; S3: hoisting the first accommodation cabin off the ground and installing a mobile carrying mechanism to slide it into the second accommodation cabin; S4: Conduct comprehensive performance test on hydrogen storage bottles.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1) In the present invention, the temperature, humidity, pressure and other environmental parameters in the first and second storage chambers can be controlled, so that the hydrogen storage bottles can be subjected to relevant tests such as air pressure circulation test, penetration test, and static pressure test in the simulated environment created by the first and second storage chambers, so as to facilitate the recording of accurate data on the performance of the hydrogen storage bottles and to carry out targeted improvement on their comprehensive performance.

[0015] 2) In the present invention, the second holding chamber serves as the main environmental chamber and can provide a variety of external test environments for the hydrogen storage bottle, such as high temperature, low temperature, high pressure, low pressure and other environments. The first holding chamber serves as a permeation chamber and can be connected to an external hydrogen detection device to detect the leakage of the hydrogen storage bottle, so as to monitor the hydrogen permeation amount under each test condition, thereby achieving the purpose of obtaining test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the assembly of the hydrogen storage bottle and the first containing chamber in the present invention.

[0018] Figure 2 It is a schematic diagram of the cooperation structure between the buckle frame mechanism and the first storage compartment in the present invention.

[0019] Figure 3 It is a schematic diagram of the overall structure of the buckle frame mechanism in the present invention.

[0020] Figure 4 It is a schematic diagram of the assembly structure of the movable carrying mechanism and the first accommodating compartment in the present invention.

[0021] Figure 5 It is a schematic diagram of the assembly structure of the first accommodating compartment and the second accommodating compartment in the present invention.

[0022] Figure 6It is a schematic diagram of the support platform structure in the second storage cabin of the present invention.

[0023] Figure 7 It is a schematic diagram of the locking component structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the assembly structure of the comprehensive test environment chamber in the pit of the present invention.

[0025] Among them: 1-hydrogen storage bottle, 2-first storage compartment, 21-first hatch, 22-fixed lifting foot, 3-buckle mechanism, 31-limiting frame, 32-pulley assembly, 321-connecting plate, 322-pulley, 33-fixing bolt, 4-second storage compartment, 41-second hatch, 42-support member, 43-support platform, 5-mobile bearing mechanism, 51-support frame, 52-support leg, 53-locking assembly, 531-locking block, 532-limiting block, 533-locking pin, 534-pull rod, 535-spring, 6-convective heat exchange fan, 7-pit, 8-crane. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0027] Example 1: A comprehensive test environment chamber for hydrogen storage bottles, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, including: A first accommodating chamber 2, which is used to accommodate and install the hydrogen storage bottle 1; A second accommodating compartment 4, the second accommodating compartment 4 is used to accommodate and install the first accommodating compartment 2; The mobile carrying mechanism 5 is used to carry and move the first receiving compartment 2 into the second receiving compartment 4 .

[0028] The first storage cabin 2 and the second storage cabin 4 are both cylindrical cabin structures. The first storage cabin is hoisted into the second storage cabin by the overhead crane 8 to form a double-layer environmental cabin; the hydrogen storage bottle 1 is externally sleeved with two sets of buckle frame mechanisms 3, the buckle frame mechanism 3 includes a limit frame 31 and four pulley 322 assemblies 32, the limit frame 31 is an annular structure, the limit frame 31 is sleeved on the hydrogen storage bottle 1, the pulley 322 assemblies 32 are arranged around the limit frame 31, the angles between the pulley 322 assemblies 32 are equal, and fixing bolts 33 are provided between adjacent pulley 322 assemblies 32 on the limit frame 31, the fixing bolts 33 pass through the limit frame 31 and abut against the hydrogen storage bottle 1, and the four pulley 322 assemblies 32 of the buckle frame mechanism 3 abut against the inner side wall of the first storage cabin so that the hydrogen storage bottle 1 and the first storage cabin 2 are kept spaced apart; the pulley 322 assembly 32 includes two sets of connecting plates 321 and two pulleys 322, and each set of connecting plates 321 includes two independent connecting plates 32 1; two groups of connecting plates 321 are respectively arranged on the left and right sides of the limiting frame 31 and are arranged opposite to each other, and the pulley 322 is arranged between the same group of connecting plates 321 through a rotating shaft, and the top surfaces of the two pulleys 322 located on the left and right sides of the limiting frame 31 are in the same horizontal plane, and the pulley 322 is protruded on the limiting frame 31 and abuts against the inner wall of the first accommodating compartment 2; a first hatch 21 is provided at the tail end of the first accommodating compartment 2, and the hydrogen storage bottle 1 slides into the first accommodating compartment through the first hatch 21; a convection heat exchange fan 6 is provided at the end of the first accommodating compartment 2, and a plurality of test interfaces are provided above the first accommodating compartment 2. The test interfaces can be closed or opened, and can also be connected to the outside through pipes; a second hatch 41 is provided at the end of the second accommodating compartment 4, and a convection heat exchange fan 6 is also provided at the other end of the second accommodating compartment 4. A plurality of test interfaces are also provided above it. The test interfaces of the second accommodating compartment 4 can be closed or opened, and can also be connected to the outside through pipes. When the first storage compartment 2 is inside the second storage compartment 4, the convection heat exchange fan 6 on the first storage compartment 2 is close to the second hatch 41 at the end of the second storage compartment 4, so that the convection heat exchange fans 6 on the two storage compartments are set in opposite directions; the convection heat exchange fans 6 on the two storage compartments are set in opposite directions, so that the ambient temperature in the first storage compartment 2 and the second storage compartment 4 can be quickly restored after the test. After the second hatch 41 is opened, the convection heat exchange fan 6 on the first storage compartment 2 is turned on, and the convection heat exchange fans 6 on the two storage compartments are turned on to make the first storage compartment 2 The temperature, humidity and pressure in the second storage chamber 4 are consistent with the external environment, and then the next test can be carried out; two sets of fixed lifting feet 22 are arranged under the first storage chamber 2, and the fixed lifting feet 22 support the first storage chamber 2; a flat support platform 43 is provided in the second storage chamber 4, and the first storage chamber and the mobile carrying mechanism 5 slide into the second storage chamber 4 at the same time, and the mobile carrying mechanism 5 abuts against the support platform 43 in the second storage chamber 4; multiple sets of support members 42 are arranged under the second storage chamber 4 to support and fix the second storage chamber 4.

[0029] The second storage chamber 4 serves as the main environmental chamber, mainly providing a test environment for the hydrogen storage bottle 1, so that the hydrogen storage bottle 1 under test can undergo relevant reliability tests under a preset temperature environment; the second storage chamber 4 can be connected to a heating system, a cooling system, and a temperature control sensor, etc., and the internal ambient temperature can be adjusted in the second storage chamber 4 to perform relevant tests on the hydrogen storage bottle 1 in the first storage chamber 2.

[0030] The first storage chamber 2 serves as a permeation chamber, and the hydrogen storage bottle 1 is placed in the first storage chamber 2. The function of the first storage chamber 2 is to allow the hydrogen storage bottle 1 to detect the permeation and leakage of hydrogen under external high and low temperature environmental factors. If there is a leak of hydrogen in the hydrogen storage bottle 1, the hydrogen will directly leak into the first storage chamber 2. There is a gas detection interface on the first storage chamber 2, and the interface can be connected to an external hydrogen detection system to further detect the actual permeation of hydrogen under different test conditions.

[0031] The first storage chamber 2 uses external piping to perform nitrogen replacement, internal gas detection, and temperature measurement. The gas within the first storage chamber 2 is transported via piping to a hydrogen permeation detection device outside the second storage chamber 4 for measurement. The first storage chamber 2 is also equipped with a high-pressure pipeline that connects the hydrogen storage bottle 1 to an external gas source, allowing the external control system to increase, maintain, and reduce the pressure of the hydrogen storage bottle 1.

[0032] During the test, the second holding chamber 4 is loaded with high or low temperature and hydrogen is directly injected into or released into the hydrogen storage bottle 1 placed in the first holding chamber 2 to perform a pressure increase, pressure maintenance and pressure reduction test on the hydrogen storage bottle 1. During the test, the hydrogen permeation amount under each test condition is monitored to achieve the purpose of obtaining test data.

[0033] Example 2: Based on the above embodiment, this embodiment further defines the mobile carrying mechanism 5, such as Figure 4 、 Figure 5 and Figure 7As shown, the mobile carrying mechanism 5 includes a support frame 51 and a group of support legs 52. The support legs 52 are hinged to the left and right sides of the support frame 51 and are located at the front end of the support member 42. A locking assembly 53 is provided on the support frame 51, and the locking assembly 53 is used to lock the support legs 52; the support frame 51 is installed at the bottom of the first storage cabin 2 and is connected to the fixed lifting foot 22 of the first storage cabin 2. Rollers are provided under the support legs 52 and the support frame 51. When hoisting the first storage cabin 2, the bottom rollers of the rear end of the support frame 51 are first placed on the support platform 43 in the second storage cabin 4, and then The first storage compartment 2 is pushed into the second storage compartment 4 through an external device; the locking assembly 53 includes: a locking block 531, a limiting block 532, a locking pin 533 and a spring 535, the limiting block 532 is arranged on one side of the locking block 531, the limiting block 532 is connected to the locking block 531, a mounting groove is provided on the limiting block 532, a through hole is provided on the locking block 531, the mounting groove and the through hole are coaxially arranged, the locking pin 533 is arranged in the through hole and can slide in the through hole and the mounting groove, and the end of the locking pin 533 is close to the side of the rotation direction of the support leg 52 and is set as a curved structure. At the same time, a pull rod 534 is provided on the locking pin 533, and the pull rod 534 extends from the bottom of the installation slot of the limit block 532. The spring 535 is sleeved on the pull rod 534 and abuts against the locking pin 533 and the bottom of the installation slot; a locking hole is provided on the support leg 52, and the locking hole is coaxially arranged with the through hole. When the first storage compartment 2 is pulled out of the second storage compartment 4, the support leg 52 rotates under the action of gravity and squeezes the locking pin 533 along the curved structure at the end of the locking pin 533 to retract it into the installation slot. When the locking hole of the support leg 52 rotates to be coaxial with the through hole, The locking pin 533 is reset under the action of the spring 535 and inserted into the locking hole to fix the support leg 52, so that the support leg 52 is perpendicular to the ground, facilitating the sliding and pulling out of the first storage compartment 2. When the first storage compartment 2 is pushed into the second storage compartment 4, the support frame 51 slides to the position of the support leg 52, and the pull rod 534 is pulled from behind the limit block 532 to retract the locking pin 533, releasing the limit of the support leg 52, so that the support leg 52 rotates to a position parallel to the support frame 51. After the first storage compartment 2 and the support frame 51 are pushed into the second storage compartment 4 as a whole, the second door 41 is closed. The rest of this embodiment is the same as the above embodiment and will not be repeated here.

[0034] Example 3: A method for installing and testing a comprehensive test environment chamber for hydrogen storage bottles, such as Figure 5 and Figure 8 As shown, the following steps are included: S1: Pre-install the pit 7 and the overhead crane 8 and lay the embedded pipes; S2: Install the buckle mechanism 3 on the hydrogen storage bottle 1 and slide it into the first storage compartment 2; S3: hoist the first storage compartment 2 off the ground and install the mobile carrying mechanism 5 so that it slides into the second storage compartment 4; S4: Conduct comprehensive performance test on hydrogen storage bottle 1.

[0035] When assembling the comprehensive test environment chamber, a pit 7 needs to be dug in advance and reinforced with reinforced concrete. The depth of pit 7 is 2.8 meters, the ground needs to be self-leveled, drainage ditches are built around it, the pit 7 and the ground are waterproofed, and fences are installed around pit 7; a crane 8 is installed above pit 7, the crane 8 is 3 meters above the ground, the span is 9.1 meters, the lowering height is 6 meters, and the rated lifting weight is 3000 kg; the walking area of crane 8 covers the area of pit 7; pipes are pre-laid on one side of pit 7, and a control unit is set up next to pit 7, and stairs and access control are set up in one corner of pit 7; in pit 7, the hydrogen storage bottle 1 is inserted into the first holding chamber 2 through the buckle mechanism 3, and the first holding chamber and the mobile carrying mechanism 5 are lifted by the crane 8 and slid into the second holding chamber 4 together; after checking the airtightness of the first holding chamber 2 and the second holding chamber 4, subsequent performance tests of related hydrogen storage bottles 1 are carried out.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0037] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of the present invention does not necessarily imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0038] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A comprehensive test environment chamber for hydrogen storage bottles, characterized in that: include: a first accommodating chamber, wherein the first accommodating chamber is used to accommodate and install a hydrogen storage bottle; a second accommodating compartment, the second accommodating compartment being used to accommodate and install the first accommodating compartment; The mobile carrying mechanism is used to carry and move the first accommodating chamber into the second accommodating chamber.

2. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: The outer sleeve of the hydrogen storage bottle is provided with at least two sets of buckle frame mechanisms, and the buckle frame mechanism includes a limit frame and multiple pulley assemblies. The limit frame is a ring structure, and the limit frame is arranged on the hydrogen storage bottle. The pulley assemblies are arranged around the limit frame, and the angles between the pulley assemblies are equal. Fixing bolts are provided between adjacent pulley assemblies on the limit frame, and the fixing bolts pass through the limit frame and abut against the hydrogen storage bottle; the pulley assembly abuts against the inner side wall of the first storage compartment.

3. The hydrogen storage bottle comprehensive test environment chamber according to claim 2, characterized in that: The pulley assembly includes two groups of connecting plates and two pulleys. The two groups of connecting plates are respectively arranged on the left and right sides of the limit frame. The pulleys are arranged between the same group of connecting plates through a rotating shaft. The top surfaces of the two pulleys are in the same horizontal plane. The pulleys are protruded on the limit frame and abut against the inner side wall of the first accommodating chamber.

4. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: The first storage chamber and the second storage chamber are both provided with a convection heat exchange fan and multiple test interfaces. When the first storage chamber is in the second storage chamber, the convection heat exchange fan on the first storage chamber is close to the end of the second storage chamber; the test interface is set at the top of the first storage chamber and the second storage chamber.

5. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: At least one set of fixed hoisting feet is provided below the first accommodating chamber, and the fixed hoisting feet supports the first accommodating chamber.

6. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: The mobile bearing mechanism includes a support frame and a group of support legs, the support legs are hinged to the left and right sides of the support frame, and a locking assembly is provided on the support frame, and the locking assembly is used to lock the support legs; rollers are provided on the support frame and under the support frame.

7. The hydrogen storage bottle comprehensive test environment chamber according to claim 6, characterized in that: The locking assembly includes: a locking block, a limit block, a locking pin and a spring, the limit block is arranged on one side of the locking block, the limit block is connected to the locking block, the limit block is provided with a mounting groove, the locking block is provided with a through hole, the mounting groove and the through hole are coaxially arranged, the locking pin is arranged in the through hole and can slide in the through hole and the mounting groove, the locking pin is provided with a pull rod, the pull rod extends from the bottom of the mounting groove of the limit block, the spring is sleeved on the pull rod and abuts against the locking pin and the bottom of the mounting groove; a locking hole is provided on the support leg, the locking hole is coaxially arranged with the through hole, and the end of the locking pin extends from the through hole and is inserted into the locking hole to lock the support leg.

8. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: A support platform is provided in the second accommodating chamber, and the movable carrying mechanism abuts against the support platform.

9. The hydrogen storage bottle comprehensive test environment chamber according to claim 1, characterized in that: A plurality of support members are provided below the second accommodating compartment.

10. A method for installing and testing a comprehensive test environment chamber for a hydrogen storage bottle, characterized in that: The following steps are involved: S1: Pre-install pit and overhead crane and lay embedded pipes; S2: Installing a buckle mechanism on the hydrogen storage bottle and sliding it into the first accommodation compartment; S3: hoisting the first accommodation cabin off the ground and installing a mobile carrying mechanism to slide it into the second accommodation cabin; S4: Conduct comprehensive performance test on hydrogen storage bottles.

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