A low-temperature liquid hydrogen storage tank with a multi-layer insulation structure

Abstract

The utility model relates to the technical field of energy automobile, specifically disclose a kind of low-temperature liquid hydrogen storage tank with multilayer heat insulation structure of liquid hydrogen storage and transportation, it include: low-temperature liquid hydrogen storage tank body, and set up the heat insulation tank layer of low-temperature liquid hydrogen storage tank body outer surface, still include: the outside of the heat insulation tank layer is provided with protection assembly, and protection assembly is connected with heat insulation protective outer shell by anti-collision component, the outside of heat insulation protective outer shell is connected with the link outer shell and constitutes dismounting structure by connecting flange, the outside of heat insulation protective outer shell is connected with the link outer shell and constitutes dismounting structure by connecting flange, and the inside of connecting cylinder is provided with first hydrogen delivery pipe and second hydrogen delivery pipe respectively. The low-temperature liquid hydrogen storage tank with multilayer heat insulation structure, the setting of protection assembly can protect the outer end of storage tank, meanwhile under the setting of anti-collision component, can prevent internal storage tank breakage under the impact of heat insulation protective outer shell, reach better protection effect by double protection.

Description

Technical Field

[0001] This utility model relates to the field of energy vehicle technology, specifically to a cryogenic liquid hydrogen storage tank with a multi-layer insulation structure. Background Technology

[0002] Cryogenic liquid hydrogen storage tanks for new energy vehicles are cryogenic containers specifically designed for storing and transporting liquid hydrogen. They consist of an inner liner, an outer shell, and an insulation structure. Compared to high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage technology can significantly increase hydrogen storage density. This means that liquid hydrogen can store more energy within the same volume, thus significantly improving the driving range of hydrogen fuel cell vehicles and meeting the needs of long-distance travel, such as:

[0003] CN115711358B discloses a liquid hydrogen storage and transportation tank system, comprising a base, a first vacuum outer container welded to the base, a mounting base assembly mounted on the base and located inside the first vacuum outer container, a liquid hydrogen tank assembly mounted on the mounting base assembly, liquid hydrogen input and output pipelines, a hydrogen input and output connector assembly disposed on the liquid hydrogen tank assembly, a gaseous hydrogen output pipeline connected to the hydrogen input and output connector assembly; a gaseous hydrogen output interface flange assembly, a liquid hydrogen input and output interface flange assembly, and a helium output and input connection flange disposed on the base; and a hydrogen fuel cell system connected to the gaseous hydrogen output pipeline, an on-board liquid hydrogen storage and transportation system control system, and a refrigeration system driven by the hydrogen fuel cell system. This invention solves the problem of hydrogen embrittlement damage to the structural steel of liquid hydrogen storage tanks, improves cryogenic insulation, reduces "heat leakage" losses in liquid hydrogen storage and transportation tanks, and enhances the intrinsic safety of liquid hydrogen storage tanks.

[0004] The existing technical solutions have the following drawbacks: Existing liquid hydrogen storage tanks will shake when installed in new energy vehicles. Although the internal low-temperature insulation function can be improved, it is not convenient to protect the storage tank and it is also inconvenient to disassemble the protective device. Therefore, we propose a low-temperature liquid hydrogen storage tank with a multi-layer insulation structure to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a cryogenic liquid hydrogen storage tank with a multi-layer insulation structure to solve the problems mentioned in the background art. Existing liquid hydrogen storage tanks, when installed in new energy vehicles, will shake. Although the internal cryogenic insulation function can be improved, it is not convenient to protect the storage tank and it is also inconvenient to disassemble the protective device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cryogenic liquid hydrogen storage tank with a multi-layer insulation structure, comprising: a cryogenic liquid hydrogen storage tank body, and an insulation tank layer disposed on the outer surface of the cryogenic liquid hydrogen storage tank body.

[0007] Also includes:

[0008] The outer side of the heat insulation tank layer is provided with a protective component, and the protective component is connected to the heat insulation protective shell through an anti-collision component. The outer side of the heat insulation protective shell is connected to the connecting shell through a connecting flange to form a disassembly structure. The outer side of the heat insulation protective shell is connected to a connecting cylinder, and the inside of the connecting cylinder is respectively provided with a first hydrogen transmission pipe and a second hydrogen transmission pipe. The first hydrogen transmission pipe and the second hydrogen transmission pipe are connected to the cryogenic liquid hydrogen storage tank body.

[0009] Both the connecting outer shell and the heat-insulating protective outer shell have support legs welded and fixed to their bottoms.

[0010] As a preferred technical solution of this utility model, the heat insulation protective shell is provided with mounting grooves at equal intervals in the middle, and the interior of the mounting grooves is connected to the anti-collision components.

[0011] As a preferred embodiment of this utility model, the anti-collision component includes a connecting spring disposed in the mounting groove, and the inner end of the connecting spring is connected to a protective cover.

[0012] As a preferred technical solution of this utility model, the longitudinal section of the protective cover is a semi-arc structure, which plays a role in preventing collisions to the internal cryogenic liquid hydrogen storage tank body.

[0013] As a preferred technical solution of this utility model, the protective component includes protective steel columns disposed on the outer surface of the heat insulation tank layer, and the individual protective steel columns are connected by connecting columns. A positioning block is welded and fixed on the outer side of the protective steel column, and a connecting rod is disposed inside the positioning block.

[0014] As a preferred technical solution of this utility model, the longitudinal section of the protective steel column is a circular structure that matches the curvature of the heat insulation tank layer and the heat insulation protective outer shell, and the protective steel columns are evenly spaced in the middle of the heat insulation tank layer.

[0015] As a preferred technical solution of this utility model, the outermost two ends of the protective steel column are welded to the positioning block, and the connecting rod is connected to the positioning block and the heat insulation protective shell respectively by threads, and the positioning block is fitted to the inner wall of the heat insulation protective shell.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the cryogenic liquid hydrogen storage tank with a multi-layer heat insulation structure can protect the outer end of the tank through the setting of protective components, and at the same time, with the setting of anti-collision components, it can prevent the inner tank from being damaged by the impact of the heat insulation protective outer shell, thereby achieving a better protection effect through double protection.

[0017] 1. The longitudinal section of the protective steel column is a circular structure that matches the curvature of the heat insulation tank layer and the heat insulation protective outer shell. The protective steel columns are evenly spaced in the middle of the heat insulation tank layer. The installation of the protective steel columns will support and protect the outer end of the heat insulation tank layer, increasing the robustness of the protection of the cryogenic liquid hydrogen storage tank body and the heat insulation tank layer.

[0018] 2. The outermost two ends of the protective steel column are welded to the positioning block, and the connecting rod is connected to the positioning block and the heat insulation protective shell respectively by threads. The positioning block is fitted to the inner wall of the heat insulation protective shell. By rotating the connecting rod, the connecting rod is connected to the heat insulation protective shell and the positioning block, thereby stably installing the protective steel column into the heat insulation protective shell.

[0019] 3. The thermal insulation protective shell has equally spaced mounting slots in the middle, and the interior of the mounting slots is connected to the anti-collision components. The longitudinal section of the protective cover is a semi-arc structure, which plays a role in preventing collisions to the internal cryogenic liquid hydrogen storage tank. When the interior of the thermal insulation protective shell is impacted, the connecting spring extends and retracts. Through the hydraulic rod inside the connecting spring, the interior of the thermal insulation protective shell, with the double cooperation of the protective steel column and the anti-collision components, plays a role in preventing collisions to the cryogenic liquid hydrogen storage tank. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the connection between the outer shell and the body of the cryogenic liquid hydrogen storage tank of this utility model.

[0023] Figure 3 This is a schematic cross-sectional view of the connection between the cryogenic liquid hydrogen storage tank body and the insulation tank layer of this utility model.

[0024] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic cross-sectional view of the connection between the heat insulation protective outer shell and the heat insulation tank layer of this utility model.

[0026] Figure 6 This utility model Figure 5 Enlarged structural diagram at point B;

[0027] Figure 7This is a schematic diagram of the overall explosion structure of the protective cover and protective steel column of this utility model.

[0028] In the diagram: 1. Support leg; 2. Thermal insulation protective outer shell; 3. Connecting shell; 4. Connecting cylinder; 5. First hydrogen pipeline; 6. Second hydrogen pipeline; 7. Cryogenic liquid hydrogen storage tank body; 8. Insulated tank layer; 9. Mounting groove; 10. Connecting spring; 11. Protective cover; 12. Protective steel column; 13. Connecting column; 14. Positioning block; 15. Connecting rod; 16. Connecting flange. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Please see Figures 1-7 The present invention provides the following technical solution:

[0031] A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure includes: a support leg 1, an insulating protective outer shell 2, a connecting outer shell 3, a connecting cylinder 4, a first hydrogen transmission pipe 5, a second hydrogen transmission pipe 6, a cryogenic liquid hydrogen storage tank body 7, an insulation tank layer 8, a mounting groove 9, a connecting spring 10, a protective cover 11, a protective steel column 12, a connecting column 13, a positioning block 14, a connecting rod 15, and a connecting flange 16.

[0032] Working principle: When using this cryogenic liquid hydrogen storage tank with a multi-layered insulation structure, firstly as follows... Figure 1 and Figure 3 In this system, a heat-insulating tank layer 8 is provided on the outer surface of the cryogenic liquid hydrogen storage tank body 7. A connecting cylinder 4 is connected to the outside of the heat-insulating protective outer shell 2, and a first hydrogen delivery pipe 5 and a second hydrogen delivery pipe 6 are respectively installed inside the connecting cylinder 4. The first hydrogen delivery pipe 5 and the second hydrogen delivery pipe 6 are connected to the cryogenic liquid hydrogen storage tank body 7. By injecting liquid hydrogen and gaseous hydrogen into the first hydrogen delivery pipe 5 and the second hydrogen delivery pipe 6, and with the heat-insulating tank layer 8 installed, heat insulation can be provided, keeping the interior of the cryogenic liquid hydrogen storage tank body 7 at a low temperature. The heat-insulating protective outer shell 2... The outer side is connected to the connecting shell 3 through the connecting flange 16 to form a disassembly structure. The thermal insulation protective shell 2 and the connecting shell 3 are used to protect the cryogenic liquid hydrogen storage tank body 7 and the thermal insulation tank layer 8, so that the inside can be sealed. The outer side of the thermal insulation tank layer 8 is provided with a protective component, which includes a protective steel column 12 set on the outer surface of the thermal insulation tank layer 8. The individual protective steel columns 12 are connected by connecting columns 13. The outer side of the protective steel column 12 is welded and fixed with a positioning block 14, and the interior of the positioning block 14 is provided with a connecting rod 15.

[0033] Specific examples Figure 2 , Figure 6 and Figure 7 In the above scheme, the longitudinal section of the protective steel column 12 is a circular structure that matches the curvature of the heat insulation tank layer 8 and the heat insulation protective outer shell 2. The protective steel columns 12 are evenly spaced in the middle of the heat insulation tank layer 8. The protective steel columns 12 support and protect the outer end of the heat insulation tank layer 8, increasing the robustness of the protection of the cryogenic liquid hydrogen storage tank body 7 and the heat insulation tank layer 8. The outermost two ends of the protective steel column 12 are welded to the positioning block 14, and the connecting rod 15 is connected to the positioning block 14 and the heat insulation protective outer shell 2 respectively by threads. The positioning block 14 is fitted to the inner wall of the heat insulation protective outer shell 2. When the protective steel column 12 is nested on the outer surface of the heat insulation tank layer 8, the positioning block 14 is fitted to the inner wall of the heat insulation protective outer shell 2. Then, the connecting rod 15 is rotated to connect the connecting rod 15 to the heat insulation protective outer shell 2 and the positioning block 14, thereby stably installing the protective steel column 12 into the heat insulation protective outer shell 2.

[0034] Specific examples Figure 4 , Figure 5 and Figure 7 In this structure, the protective component is connected to the thermally insulated protective shell 2 via the anti-collision component. Support legs 1 are welded and fixed to the bottom of both the connecting shell 3 and the thermally insulated protective shell 2. The support legs 1 support the thermally insulated protective shell 2 and the connecting shell 3. The thermally insulated protective shell 2 has evenly spaced mounting grooves 9 in its middle section, and the interior of the mounting grooves 9 is connected to the anti-collision component. The anti-collision component includes a connecting spring 10 installed within the mounting groove 9, and a protective cover 11 is connected to the inner end of the connecting spring 10. When the interior of the thermally insulated protective shell 2 is impacted, the connecting spring 10 extends and retracts. Through the hydraulic rod within the connecting spring 10, and the semi-arc structure of the protective cover 11, the internal cryogenic liquid hydrogen storage tank body 7 is protected against collisions. Thus, the interior of the thermally insulated protective shell 2, through the dual protection of the protective steel column 12 and the anti-collision component, effectively protects the cryogenic liquid hydrogen storage tank body 7 from collisions. This is the method of using this cryogenic liquid hydrogen storage tank with a multi-layered thermal insulation structure.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cryogenic liquid hydrogen storage tank with a multi-layered insulation structure, comprising: The cryogenic liquid hydrogen storage tank body (7) and the heat insulation tank layer (8) disposed on the outer surface of the cryogenic liquid hydrogen storage tank body (7). Its characteristic is that it further includes: The outer side of the heat insulation tank layer (8) is provided with a protective component, and the protective component is connected to the heat insulation protective shell (2) through the anti-collision component. The outer side of the heat insulation protective shell (2) is connected to the connecting shell (3) through the connecting flange (16) to form a disassembly structure. The outer side of the heat insulation protective shell (2) is connected to a connecting cylinder (4), and the inner side of the connecting cylinder (4) is provided with a first hydrogen pipeline (5) and a second hydrogen pipeline (6). The first hydrogen pipeline (5) and the second hydrogen pipeline (6) are connected to the cryogenic liquid hydrogen storage tank body (7). Both the connecting shell (3) and the heat insulation protective shell (2) are welded and fixed with support legs (1) at their bottoms.

2. The cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 1, characterized in that: The heat-insulating protective outer shell (2) has mounting grooves (9) evenly spaced in the middle, and the interior of the mounting grooves (9) is connected to the anti-collision component.

3. A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 2, characterized in that: The anti-collision component includes a connecting spring (10) disposed in the mounting groove (9), and the inner end of the connecting spring (10) is connected to a protective cover (11).

4. A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 3, characterized in that: The longitudinal section of the protective cover (11) is a semi-arc structure, which plays a role in preventing collisions to the internal cryogenic liquid hydrogen storage tank body (7).

5. A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 1, characterized in that: The protective assembly includes protective steel columns (12) set on the outer surface of the heat insulation tank layer (8), and the individual protective steel columns (12) are connected by connecting columns (13). A positioning block (14) is welded and fixed on the outside of the protective steel column (12), and a connecting rod (15) is provided inside the positioning block (14).

6. A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 5, characterized in that: The longitudinal section of the protective steel column (12) is a circular structure that matches the curvature of the heat insulation tank layer (8) and the heat insulation protective outer shell (2), and the protective steel column (12) is evenly spaced in the middle of the heat insulation tank layer (8).

7. A cryogenic liquid hydrogen storage tank with a multi-layer insulation structure according to claim 5, characterized in that: The outermost two ends of the protective steel column (12) are welded to the positioning block (14), and the connecting rod (15) is connected to the positioning block (14) and the heat insulation protective shell (2) respectively by threads, and the positioning block (14) is fitted to the inner wall of the heat insulation protective shell (2).

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