High vacuum multilayer insulated liquid hydrogen storage container

Abstract

The utility model relates to liquid hydrogen storage container technical field, specifically disclose a high vacuum multilayer heat insulation liquid hydrogen storage container, including for filling liquid nitrogen and having the opening one of content container of top, set up in the hydrogen storage tank for storing liquid hydrogen of content container and for, the outer container of being sleeved in the outside of content container and forming the chamber between content container, and with outer container, content container, hydrogen storage tank respectively connects and is used for the flange spare of closing chamber, opening one, opening two are set up in the top of outer container, opening one and opening two coaxial arrangement, the heat insulation subassembly is set up in the outside of content container. The utility model has good explosion -proof heat insulation effect, through flange subassembly effectively realized separation formula design, and the installation and maintenance of hydrogen storage tank are convenient, simple structure, strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of liquid hydrogen storage container technology, and more specifically, to a high-vacuum multilayer insulated liquid hydrogen storage container. Background Technology

[0002] Existing liquid hydrogen storage containers have the following problems: Limited insulation: Traditional MLI containers typically use a single material for their insulation layer, which is insufficient to effectively block multiple heat transfer methods such as heat radiation, heat conduction, and convection, resulting in significant liquid hydrogen evaporation losses.

[0003] Improving thermal insulation efficiency is not easy: Vacuum multilayer insulation (MLI) has a bottleneck in radiative heat conduction. Simply increasing the number of MLI layers leads to a sharp increase in thickness and cost (the marginal benefit decreases significantly after more than 50 layers).

[0004] Safety needs to be improved: Liquid hydrogen is flammable and explosive, and traditional MLI containers may pose safety hazards under extreme conditions.

[0005] Installation and subsequent maintenance are inconvenient: Conventional liquid hydrogen storage containers have a double-sealed structure, which is not conducive to the installation and subsequent maintenance of the inner liner.

[0006] Supervision and inspection are not easy: the current pressure vessel standards do not mention the design supervision and inspection of vessels with more than three layers. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a high-vacuum multilayer insulated liquid hydrogen storage container, which effectively realizes a separable design through a flange assembly, facilitating the installation and maintenance of the hydrogen storage tank; it has a simple structure and strong practicality; The solution adopted by this utility model to solve the technical problem is: A high-vacuum multilayer insulated liquid hydrogen storage container includes an inner container for filling liquid nitrogen and having an opening at the top; a hydrogen storage tank disposed inside the inner container for storing liquid hydrogen; an outer container fitted outside the inner container and forming a chamber between the outer container and the inner container; and flanges connected to the outer container, the inner container, and the hydrogen storage tank respectively and used to close the chamber and the opening at the top; the outer container has an opening at the top, and the opening at the top and the opening at the bottom are coaxially arranged; a heat insulation assembly is disposed on the outside of the inner container.

[0008] In some possible implementations, the flange includes a flange that is connected to the opening end of the inner container and the opening end of the outer container respectively and closes the chamber to form a vacuum jacket cavity, and a flange cover that is mounted on the flange and connected to the hydrogen storage tank.

[0009] In some possible implementations, the hydrogen storage tank is connected to the flange cover via a connecting bracket.

[0010] In some possible implementations, the insulation assembly includes an insulation layer wrapped around the outside of the inner container and a cooling coil disposed within the insulation layer and spirally wound around the outside of the inner container.

[0011] In some possible implementations, a radiation-shielding metal film is wrapped around the outside of the cold shield coil.

[0012] In some possible implementations, a groove structure is provided on the outer side of the cold shield coil.

[0013] In some possible implementations, one end of the cold screen coil is connected to the interior of the inner container, and the other end passes through the outer container and is connected to a nitrogen supply pipe.

[0014] In some possible implementations, the flange assembly is provided with a hydrogen delivery pipe communicating with the interior of the hydrogen storage tank, a level gauge 1 for monitoring the liquid hydrogen level in the hydrogen storage tank, a pressure sensor 1 for monitoring the pressure in the hydrogen storage tank, a level gauge 2 for monitoring the liquid nitrogen level in the inner container, and a pressure gauge 2 for monitoring the pressure in the inner container.

[0015] In some possible implementations, the vacuum level of the vacuum interlayer cavity is less than 0.1 MPa, and an adsorbent is disposed within the vacuum interlayer cavity.

[0016] In some possible implementations, the adsorbent is a molecular sieve.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The liquid nitrogen-filled inner container of this utility model will effectively achieve heat insulation protection and explosion-proof function for hydrogen storage tanks. This utility model achieves multi-layer heat insulation by setting up an insulation layer and a cold shield coil, which reduces the advantage of heat radiation. This utility model connects the inner container and the outer container into a whole through a flange, and connects the flange cover and the hydrogen storage tank into a whole structure. The connection between the flange and the flange cover makes the two whole structures connected and fixed, realizing a separate design. This method facilitates the installation and maintenance of the hydrogen storage tank and makes design supervision easier. This utility model has a simple structure and is highly practical. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of this utility model; Figure 2 This is a schematic diagram of the thermal insulation component in this utility model; Figure 3 In this utility model Figure 1 Enlarged view of point A in the middle; Figure 4This is a schematic diagram of the external structure of this utility model; The components are: 1. Hydrogen storage tank; 2. Inner container; 3. Outer container; 31. Nitrogen delivery pipe; 32. Liquid nitrogen output pipe; 4. Flange; 41. Flange; 411. Protrusion; 412. Circular disc; 42. Flange cover; 5. Vacuum jacket cavity; 6. Insulation assembly; 61. Insulation layer; 62. Cold shield coil; 10. Thermal insulation structure; 101. Thermal insulation board; 102. Circular plate. Detailed Implementation

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The present invention will now be described in detail.

[0021] like Figures 1-4 As shown: A high-vacuum multilayer insulated liquid hydrogen storage container includes an inner container 2 for filling liquid nitrogen and having an opening at the top; a hydrogen storage tank 1 disposed inside the inner container 2 for storing liquid hydrogen; an outer container 3 fitted outside the inner container 2 and forming a chamber between the outer container 2 and the inner container 2; and a flange 4 connected to the outer container 3, the inner container 2, and the hydrogen storage tank 1 respectively and used to close the chamber and the opening at the top; the outer container 3 has an opening at the top, and the opening at the top and the opening at the bottom are coaxially arranged; a heat insulation component 6 is disposed outside the inner container 2.

[0022] In this utility model, opening one and opening two are arranged on the same side, and a cavity is formed between the outer side of the inner container 2 and the inner side of the outer container 3. The opening positions of the two are sealed by the flange 4 to form a vacuum interlayer cavity 5. The vacuum interlayer cavity 5, together with the heat insulation component 6, effectively prevents heat from being lost from the inner container 2 and the outer container 3 to the outside, resulting in good heat insulation and significantly reducing the vaporization loss of the cryogenic liquid nitrogen medium in the liquid hydrogen storage container. The hydrogen storage tank 1 of this utility model is located inside the inner container 2 and connected to the flange 4, thereby effectively protecting the hydrogen storage tank 1 that stores liquid hydrogen; by sealing the opening through the flange 4, a sealed space is formed inside the inner container 2 for storing cryogenic liquid nitrogen, and the liquid nitrogen will achieve heat insulation and explosion protection for the hydrogen storage tank 1. The hydrogen storage tank 1 is connected to the flange 4, making the whole structure formed by the hydrogen storage tank 1, the inner container 2 and the outer container 3 separate, which facilitates installation and subsequent maintenance, and also makes it easier to carry out relevant inspections.

[0023] In some possible implementations, in order to effectively assemble the outer container 3, the inner container 2, and the hydrogen storage tank 1, the flange 4 includes a flange 41 that is connected to the open end of the inner container 2 and the open end of the outer container 3 respectively and seals the chamber to form a vacuum jacket cavity 5, and a flange cover 42 that is mounted on the flange 41 and connected to the hydrogen storage tank 1. Preferably, flange 41 is a high-neck flange, including a protrusion 411 coaxial with and communicating with the opening end of the inner container 2, and an annular disk 412 fitted on the outside of the protrusion 411 and connected to the opening end of the outer container 3. The top surface of the annular disk 412 is coplanar with the top surface of the protrusion 411. The annular disk 412 will seal the cavity formed between the inner container 2 and the outer container 3 to form a vacuum jacket cavity 5. At the same time, the annular disk 412 is connected to the flange cover 42 by bolts. The flange cover 42 will seal the inner hole in the protrusion 411 that communicates with the opening, thereby forming a sealed cavity inside the entire container.

[0024] In some possible implementations, in order to effectively connect the hydrogen storage tank 1 and the flange cover 42, the hydrogen storage tank 1 and the flange cover 42 are connected by a connecting bracket. Specifically, one end of the connecting frame is connected to the hydrogen storage tank 1, and the other end passes through the opening and is connected to the bottom of the flange cover 42, so that the overall structure formed by the flange cover 42 and the hydrogen storage tank 1 is separated from the overall structure formed by the outer container 3, the inner container 2, and the flange 41; thus facilitating installation and maintenance.

[0025] In some possible implementations, the heat insulation component 6 includes a heat insulation layer 61 wrapped around the outside of the inner container 2, and a cold shield coil 62 disposed within the heat insulation layer 61 and spirally wound around the outside of the inner container 2. Furthermore, the cold shield coil 62 is configured with multiple turns, which greatly increases the contact area with the vacuum jacket cavity 5. This configuration effectively enables temperature control of the vacuum jacket cavity 5. Compared with the prior art, this utility model uses the combination of insulation layer 61 and cold shield coil 62 to achieve insulation, which greatly simplifies the structure of insulation component 6 and improves insulation capacity. In this invention, the inner container 2 is fully wrapped by the insulation layer 61, which increases the contact area and further improves the insulation effect. The insulation layer 61 adopts the MLI multilayer structure in the prior art to achieve insulation. The cold shield coil 62 is located inside the insulation layer 61 and is spirally coiled around the outside of the inner container 2. The combination of the MLI multilayer structure and the cold shield coil 62 effectively achieves heat insulation.

[0026] In some possible implementations, in order to reduce heat radiation through the heat insulation component 6, a radiation-resistant metal film is wrapped around the outside of the cold shield coil 62.

[0027] In some possible implementations, in order to further enhance the insulation effect of the cold shield coil 62, a groove structure is provided on the outer side of the cold shield coil 62 to increase the heat radiation emission area.

[0028] In some possible implementations, one end of the cold screen coil 62 is connected to the interior of the inner container 2 and the other end passes through the outer container 3 and is connected to a nitrogen delivery pipe 31; a liquid nitrogen output pipe 32 connected to the interior of the inner container 2 is provided at the bottom of the outer container 3; the nitrogen delivery pipe 31 is installed on the outside of the outer container 3 and connected to one end of the cold screen coil 62.

[0029] Specifically, liquid nitrogen enters the inner container 2 sequentially through nitrogen delivery pipe 31 and cooling coil 62. While liquid hydrogen needs to be stored, the presence of low-temperature liquid nitrogen in the cooling coil 62 can reduce heat radiation and heat dissipation from the inner container 2, and also rapidly cool the inner container 2.

[0030] In some possible implementations, the flange 4 is provided with a hydrogen supply pipe communicating with the interior of the hydrogen storage tank 1, a level gauge 1 for monitoring the liquid hydrogen level in the hydrogen storage tank 1, a pressure sensor 1 for monitoring the pressure in the hydrogen storage tank 1, a level gauge 2 for monitoring the liquid nitrogen level in the inner container 2, and a pressure gauge 2 for monitoring the pressure in the inner container 2.

[0031] In some possible implementations, the vacuum degree of the vacuum interlayer cavity 5 is less than 0.1 MPa. The vacuum environment with a vacuum degree of less than 0.1 MPa results in better heat insulation and further reduces the vaporization loss of cryogenic liquid nitrogen. An adsorbent is provided in the vacuum interlayer cavity 5. The adsorbent is a molecular sieve. Furthermore, the adsorbent can be 5A molecular sieve or 13X molecular sieve, which will adsorb the gas released by the metal material and increase the service life of the vacuum jacket cavity 5.

[0032] Furthermore, an insulation structure 10 is fitted on the outside of the flange 4. The insulation structure 10 is installed after the flange 41 and flange cover 42 are assembled on the outside. The insulation structure 10 includes an insulation plate 101 located on the flange cover 42 and an annular plate 102 connected to the outside of the insulation plate 101 and forming a U-shaped groove between the annular plate 101 and the bottom of the insulation plate 101. The cross-section of the annular plate 102 is L-shaped. The circumferential surface of the flange 4 will be located in the U-shaped groove. Level gauge 1, level gauge 2, pressure gauge 1, pressure gauge 2, and hydrogen delivery pipe will pass through the insulation plate 101.

[0033] Furthermore, a support bracket is provided at the bottom of the outer container 3.

[0034] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A high-vacuum multilayer insulated liquid hydrogen storage container, characterized in that, The device includes an inner container for filling liquid nitrogen and having an opening at the top; a hydrogen storage tank disposed inside the inner container for storing liquid hydrogen; an outer container fitted outside the inner container and forming a chamber between the outer container and the inner container; and flanges connected to the outer container, the inner container, and the hydrogen storage tank respectively and used to close the chamber and the opening at the top; the outer container has an opening at the top, and the opening at the top and the opening at the bottom are coaxially arranged; and a heat insulation assembly is disposed on the outside of the inner container.

2. The high-vacuum multilayer insulated liquid hydrogen storage container according to claim 1, characterized in that, The flange includes a flange that is connected to the opening end of the inner container and the opening end of the outer container respectively and seals the chamber to form a vacuum jacket cavity, and a flange cover that is installed on the flange and connected to the hydrogen storage tank.

3. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 2, characterized in that, The hydrogen storage tank is connected to the flange cover via a connecting bracket.

4. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 1, characterized in that, The heat insulation component includes an insulation layer wrapped around the outside of the inner container and a cold shield coil disposed inside the insulation layer and spirally wound around the outside of the inner container.

5. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 4, characterized in that, The outside of the cold shield coil is wrapped with a radiation-proof metal film.

6. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 4, characterized in that, A groove structure is provided on the outside of the cold screen coil.

7. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 4, characterized in that, One end of the cold screen coil is connected to the interior of the inner container, and the other end passes through the outer container and is connected to a nitrogen supply pipe.

8. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 1, characterized in that, The flange assembly is equipped with a hydrogen delivery pipe communicating with the inside of the hydrogen storage tank, a level gauge 1 for monitoring the liquid hydrogen level in the hydrogen storage tank, a pressure sensor 1 for monitoring the pressure inside the hydrogen storage tank, a level gauge 2 for monitoring the liquid nitrogen level inside the inner container, and a pressure gauge 2 for monitoring the pressure inside the inner container.

9. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 2, characterized in that, The vacuum degree of the vacuum interlayer cavity is less than 0.1 MPa, and an adsorbent is provided inside the vacuum interlayer cavity.

10. A high-vacuum multilayer insulated liquid hydrogen storage container according to claim 9, characterized in that, The adsorbent is a molecular sieve.

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