Supporting structure of vehicle-mounted liquid hydrogen steel cylinder

Abstract

The utility model relates to a supporting structure of a vehicle-mounted liquid hydrogen steel cylinder, which comprises a shell, an inner container and a supporting pipe arranged between the shell and the inner container, the supporting pipe is of an L-shaped structure, one end of the supporting pipe is inserted into the inner container, and the other end of the supporting pipe is connected to a supporting sliding seat on the inner side of the shell; a supporting and fixing pipe is arranged on the inner side of the liner; a supporting pipe is inserted into the fixing pipe and is connected with a supporting end plate at the bottom; the supporting sliding seat is connected with the supporting fixed seat in a nested mode, and the supporting fixed seat is installed on a guide rail arranged in the axial direction of the shell. The structure can achieve stable supporting of the inner container, heat conduction is effectively reduced by prolonging the supporting path and arranging multiple heat insulation and adsorption structures, the liquid hydrogen storage efficiency is improved, and the advantages of being reasonable in structure and excellent in heat insulation performance are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen energy vehicle technical field especially, relate to a kind of support structure of vehicle-mounted liquid hydrogen cylinder. BACKGROUND

[0002] Hydrogen energy has the three advantages of "efficient and clean secondary energy, flexible and intelligent energy carrier, green and low-carbon industrial raw material", and has gradually built diversified application scenarios in the fields of transportation, energy storage, power generation, industry, etc. Using liquid hydrogen as the storage medium has the advantages of high energy density, low use pressure, short refueling time, and long endurance.

[0003] The temperature of liquid hydrogen is -253°C, and the standard density is 70.8 kg / m3. Using liquid hydrogen as the storage medium can improve the efficiency of hydrogen energy transportation, storage, and refueling. However, liquid hydrogen has a small latent heat of vaporization, which can easily absorb heat and vaporize in a vehicle-mounted liquid hydrogen cylinder, causing dispersion loss and even safety accidents.

[0004] As the energy storage unit of a hydrogen fuel cell vehicle, the vehicle-mounted liquid hydrogen cylinder needs to have a stable structure and good thermal insulation performance. The traditional support method can ensure the structural stability of the vehicle-mounted liquid hydrogen cylinder, but it has the disadvantages of insufficient thermal insulation effect, high evaporation rate of liquid hydrogen in the vehicle-mounted cylinder, short lossless storage time of liquid hydrogen, and impact on the development of hydrogen energy application. Developing a support form that can simultaneously meet the structure and thermal insulation performance of the liquid hydrogen cylinder can significantly promote the large-scale application of hydrogen energy.

[0005] Chinese invention patent CN118729146A "Horizontal low-temperature liquid hydrogen storage tank" discloses a horizontal low-temperature liquid hydrogen storage tank, which includes a first tank body and a second tank body. The first tank body is sleeved outside the second tank body, and a vacuum layer is arranged between the first tank body and the second tank body. The two ends of the inner wall of the second tank body are provided with head inner grooves, and the head inner grooves and the inner wall of the second tank body form cavities. The two ends of the second tank body are connected with the first tank body through first and second support mechanisms, one end of the first and second support mechanisms is connected with the first tank body, and the other end of the first and second support mechanisms is inserted into the corresponding cavities of the second tank body. The support structure selects a shaft type support structure, which supports the second tank body through the first and second support mechanisms arranged at the two ends of the second tank body, and the heat transfer between the support and the second tank body is large.

[0006] The application discloses a support structure and a liquid hydrogen cylinder with the same. Utility model content

[0007] The utility model discloses a kind of support structures of vehicle-mounted liquid hydrogen cylinders, to improve the strength of support structure, while increase the heat conduction resistance of support structure, reduce heat transfer quantity.

[0008] The utility model discloses the following technical scheme is realized: a kind of support structure of vehicle-mounted liquid hydrogen cylinders, it is characterized in that, including shell, inner bag and the support pipe being set between the shell and inner bag, the support pipe is L-shaped structure, one end is inserted inside the inner bag, the other end is connected with the support sliding seat being set in the inner side of the shell;The inner side of the inner bag is provided with support fixed pipe, the support pipe is inserted inside the support fixed pipe, and the support fixed pipe bottom is provided with support end plate;The support sliding seat is nestedly connected with support fixed seat, the support fixed seat is fixedly installed on guide rail, guide rail is arranged along the shell barrel axial direction.

[0009] Further, the support pipe and the support fixed pipe are provided with heat insulation sleeve.

[0010] Further, the support sliding seat and the support fixed seat are provided with cold insulation glass wool, to further inhibit heat conduction.

[0011] Further, the inside of the support pipe is filled with molecular sieve adsorbent, to adsorb residual air and escaped gas molecules.

[0012] Further, the shell and the inner bag are provided with high-vacuum multilayer heat insulation material.

[0013] Further, the support pipe is hollow structure made of epoxy glass material, to give consideration to mechanical strength and low thermal conductivity.

[0014] Further, the support sliding seat and the support pipe are connected by ultra-low temperature adhesive, to enhance the connection reliability under low-temperature environment.

[0015] The support structure of vehicle-mounted liquid hydrogen cylinder has the following beneficial effects:

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model uses L-shaped epoxy glass support pipe as the support structure of the vehicle-mounted liquid hydrogen steel cylinder, and simultaneously inserts the epoxy glass support pipe into the inside of the vehicle-mounted liquid hydrogen steel cylinder, the above two measures increase the length of the support pipe to increase the heat conduction resistance of the support structure and reduce the heat conduction heat transfer amount; the epoxy glass heat insulation sleeve is arranged to reduce the heat transfer between the liquid hydrogen in the steel cylinder and the L-shaped epoxy glass support pipe; the L-shaped epoxy glass support pipe is filled with active molecular sieve adsorbent to adsorb residual air molecules in the support pipe and gas molecules released by the support material, thereby reducing the molecular heat conduction heat transfer amount. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0018] Figure 1 It is a support structure schematic view of a vehicle-mounted liquid hydrogen steel cylinder.

[0019] In the figure, 1 is a shell, 2 is heat insulation material, 3 is an inner container, 4 is a support fixed pipe, 5 is a heat insulation sleeve, 6 is a support pipe, 7 is a support end plate, 8 is a molecular sieve adsorbent, 9 is cold glass wool, 10 is a support sliding seat, 11 is a support fixed seat, and 12 is a guide rail. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical scheme in the embodiments of the utility model, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0022] As Figure 1As shown, a support structure of a vehicle-mounted liquid hydrogen cylinder includes a liquid hydrogen cylinder shell 1, a high-vacuum multilayer thermal insulation material 2, a liquid hydrogen cylinder liner 3, a support fixing pipe 4, an epoxy glass thermal insulation sleeve 5, an epoxy glass support pipe 6, a support end plate 7, a molecular sieve adsorbent 8, a cold insulation glass wool 9, a support sliding seat 10, a support fixing seat 11, and a guide rail 12.

[0023] The liquid hydrogen cylinder shell 1 and the liquid hydrogen cylinder liner 3 are connected by the epoxy glass support pipe 6, one end of which is inserted into the liquid hydrogen cylinder liner 3, and the other end is connected to the support sliding seat 10 in the liquid hydrogen cylinder shell 1. The inside of the liquid hydrogen cylinder liner 3 is provided with the support fixing pipe 4, the epoxy glass support pipe 6 is inserted into the support fixing pipe 4, the bottom of the support fixing pipe 4 is provided with the support end plate 7, the support sliding seat 10 is nested with the support fixing seat 11, the support fixing seat 11 is fixed on the guide rail 12, the guide rail 12 and the support fixing seat 11 are arranged along the axial direction of the cylinder body, the cold insulation glass wool 9 is arranged between the support sliding seat 10 and the support fixing seat 11, the epoxy glass thermal insulation sleeve 5 is arranged between the epoxy glass support pipe 6 and the support fixing pipe 4, and the molecular sieve adsorbent 8 is arranged in the epoxy glass support pipe 6.

[0024] The liquid hydrogen cylinder shell 1 is made of 304 series austenitic stainless steel material, the liquid hydrogen cylinder liner 3 is made of S31608-LH austenitic stainless steel material for liquid hydrogen, and the liquid hydrogen cylinder liner 3 and the liquid hydrogen cylinder shell 1 are mirror polished. The high-vacuum multilayer thermal insulation material 2 is arranged between the liquid hydrogen cylinder shell 1 and the liquid hydrogen cylinder liner 3 to reduce the radiation heat transfer of the liquid hydrogen cylinder, thereby reducing the evaporation rate of the liquid hydrogen cylinder.

[0025] The liquid hydrogen cylinder liner 3 is provided with an epoxy glass support. The hollow pipe type support fixing pipe 4 is integrally formed, which meets the strength and rigidity requirements of the support structure of the vehicle-mounted liquid hydrogen cylinder, and at the same time reduces the support cross-sectional area to improve the thermal resistance. The epoxy glass support pipe 6 adopts an L-shaped structure, and one end extends into the liquid hydrogen cylinder liner 3, thereby further improving the thermal resistance and reducing the heat transfer amount. The epoxy glass thermal insulation sleeve 5 is arranged between the support fixing pipe 4 and the inner container to reduce the heat transfer between the inner container and the support, thereby further reducing the evaporation rate of the liquid hydrogen cylinder and prolonging the storage time of the liquid hydrogen.

[0026] The end of the L-shaped epoxy glass support pipe 6 of the vehicle-mounted liquid hydrogen cylinder is provided with a support sliding seat 10 made of stainless steel, and the support sliding seat 10 and the epoxy glass support pipe 6 are connected by ultralow-temperature glue to enhance the strength during sliding support. On the inside of the liquid hydrogen cylinder shell 1, a guide rail 12 and a support fixing seat 11 made of stainless steel are arranged along the axial direction of the cylinder body, which facilitates the installation and positioning of the support structure.

[0027] The gap between the L-shaped epoxy glass support pipe 6 inside the vehicle-mounted liquid hydrogen steel cylinder, the guide rail 12 and the shell 1 is filled with active molecular sieve adsorbent 8, which is used for adsorbing residual air molecules inside the support pipe and gas molecules released by the support material, reducing the heat conduction and heat transfer amount of the molecules, thereby further inhibiting the evaporation rate of the liquid hydrogen steel cylinder. The support end plate 7 and the cold insulation glass cotton 9 jointly constitute a multi-layer heat shield.

[0028] Compared with the prior art, the utility model has the advantages and beneficial effects as follows: the L-shaped epoxy glass support pipe 6 is used as the support structure, the length of the support pipe into the inner container 3 is prolonged to increase the heat conduction resistance; the epoxy glass heat insulation sleeve 5 reduces the heat transfer between the liquid hydrogen and the support pipe 6; the support pipe 6 is filled with active molecular sieve adsorbent 8, which adsorbs residual gas molecules to reduce the heat conduction and heat transfer amount, and finally significantly improves the liquid hydrogen storage performance.

[0029] In the above embodiments, the basic principles and main features of the utility model and the advantages of the utility model are described. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the protection scope of the claims attached to the utility model.

Claims

1. A support structure for a vehicle-mounted liquid hydrogen cylinder, characterized in that, The device includes an outer shell (1), an inner liner (3), and a support tube (6) disposed between the outer shell (1) and the inner liner (3). The support tube (6) has an L-shaped structure, with one end inserted into the inner liner (3) and the other end connected to a support sliding seat (10) disposed on the inner side of the outer shell (1). A support fixing tube (4) is disposed on the inner side of the inner liner (3), and the support tube (6) is inserted into the support fixing tube (4). A support end plate (7) is disposed at the bottom of the support fixing tube (4). The support sliding seat (10) and the support fixing seat (11) are nested together. The support fixing seat (11) is fixedly installed on a guide rail (12), which is arranged along the cylindrical axis of the outer shell (1).

2. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, An insulating sleeve (5) is provided between the support pipe (6) and the support fixing pipe (4).

3. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, A cold-insulating glass wool (9) is provided between the supporting sliding seat (10) and the supporting fixed seat (11) to further suppress heat conduction.

4. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, The interior of the support tube (6) is filled with molecular sieve adsorbent (8) to adsorb residual air and escaped gas molecules.

5. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, A high-vacuum multilayer heat insulation material (2) is provided between the outer shell (1) and the inner liner (3).

6. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, The support tube (6) is a hollow structure made of epoxy glass material to balance mechanical strength and low thermal conductivity.

7. The support structure for a vehicle-mounted liquid hydrogen cylinder according to claim 1, characterized in that, The support sliding seat (10) and the support tube (6) are connected by an ultra-low temperature adhesive to enhance the connection reliability in low temperature environments.

Images