Multi-layer adiabatic sealing structure of liquid hydrogen storage tank

Abstract

The utility model relates to liquid hydrogen storage tank technical field discloses a kind of liquid hydrogen storage tank multilayer heat insulation sealing structure, including storage tank main body, the inside of storage tank main body is provided with multilayer sealing assembly, the multilayer sealing assembly includes inner tank body, the inside of storage tank main body is equipped in inner tank body, the outer wall of inner tank body is fixedly connected with spring shock absorber, the outer wall of spring shock absorber is fixedly connected in the inner wall of storage tank main body, the end of inner tank body is fixedly connected with pressure-bearing support piece, the inner wall of inner tank body is fixedly connected with reinforcing connecting piece.In the utility model, through multilayer sealing assembly, utilize storage tank main body, inner tank body, vacuum interlayer, heat insulation interlayer realize good heat insulation, reduce heat transfer, through spring shock absorber, pressure-bearing support piece, reinforcing connecting piece guarantee structure stability and connection strength, through anticorrosion inner bag improve liquid hydrogen storage security, overall realization liquid hydrogen's safety, stable, heat insulation storage.

Description

Technical Field

[0001] This utility model relates to the field of liquid hydrogen storage tank technology, and in particular to a multi-layer heat insulation and sealing structure for liquid hydrogen storage tanks. Background Technology

[0002] Liquid hydrogen is a colorless, odorless, and transparent liquid formed by the deep cryogenic liquefaction of hydrogen gas. As a high-energy and clean secondary energy carrier, it plays a crucial role in aerospace, new energy, and other fields. At the same time, its ultra-low temperature characteristics also impose stringent requirements on its preparation, storage, and transportation.

[0003] Liquid hydrogen storage tanks are specialized equipment used to store cryogenic liquid hydrogen (boiling point -252.87℃). The core requirements are high-efficiency heat insulation, structural stability, safe sealing, and anti-sloshing and anti-corrosion. They are widely used in aerospace, energy, transportation and other fields.

[0004] While existing liquid hydrogen storage tanks can store liquid hydrogen, they suffer from several drawbacks. Firstly, traditional tanks often rely on a single insulation layer or a simple vacuum jacket, offering limited heat insulation and allowing liquid hydrogen to easily absorb external heat and evaporate, impacting storage efficiency and safety. Secondly, the connection between the inner and outer tanks is weak, lacking effective shock absorption and cushioning structures. Vibrations during transportation or use can easily cause structural loosening and even seal failure. Furthermore, the sloshing and impact of liquid hydrogen within the tank is a significant issue. Existing anti-sloshing structures often employ multi-baffle designs, which are prone to interference with wall ribs during processing, are difficult to weld, and suffer from low processing efficiency and high production costs. They also struggle to balance anti-sloshing effectiveness with liquid hydrogen flow. The mechanical energy generated by sloshing is converted into heat, further accelerating liquid hydrogen evaporation and potentially causing continuous impact on the inner wall of the tank, affecting structural reliability. Additionally, some tanks lack targeted corrosion protection designs, and prolonged contact with liquid hydrogen can lead to corrosion of the inner liner, further reducing storage safety. Therefore, this paper proposes a multi-layered insulation and sealing structure for liquid hydrogen storage tanks to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-layer thermal insulation and sealing structure for liquid hydrogen storage tanks, aiming to solve the problems of limited heat barrier effect due to the single thermal insulation structure design of liquid hydrogen storage tanks in the prior art, insufficient connection strength and shock absorption of inner and outer tanks, unreasonable anti-sway structure design that makes it difficult to balance anti-sway effect and liquid hydrogen flow, and lack of targeted anti-corrosion protection design.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-layer thermal insulation and sealing structure for a liquid hydrogen storage tank, comprising a storage tank body, wherein a multi-layer sealing assembly is provided inside the storage tank body; The multi-layer sealing assembly includes an inner tank body located inside the main body of the storage tank. A spring shock absorber is fixedly connected to the outer wall of the inner tank body, and the outer wall of the spring shock absorber is fixedly connected to the inner wall of the main body of the storage tank. A pressure-bearing support is fixedly connected to the end of the inner tank body. A reinforcing connector is fixedly connected to the inner wall of the inner tank body, and a corrosion-resistant inner liner is fixedly connected to the inner wall of the reinforcing connector. An insulation interlayer is provided between the outer wall of the corrosion-resistant inner liner and the inner wall of the inner tank body. A wave-damping assembly is provided inside the corrosion-resistant inner liner.

[0007] As a further description of the above technical solution: The spring shock absorber is provided in multiple groups, each group consisting of multiple spring shock absorbers arranged in a ring, and the multiple groups of spring shock absorbers are evenly spaced along the length of the inner tank.

[0008] As a further description of the above technical solution: Two pressure-bearing supports are provided, which are mirror images of each other along the central axis of the tank body, and the outer walls of the two pressure-bearing supports are respectively fixedly connected to the two ends of the inner wall of the tank body.

[0009] As a further description of the above technical solution: The reinforcing connectors are provided in multiple sets, each set consisting of multiple reinforcing connectors arranged in a ring, and the multiple sets of reinforcing connectors are evenly spaced along the length direction between the inner tank and the anti-corrosion inner liner.

[0010] As a further description of the above technical solution: The wave-damping assembly includes a wave-damping plate. The outer wall of the wave-damping plate is fixedly connected to the inner wall of the anti-corrosion liner. Multiple wave-damping plates are provided along the length of the anti-corrosion liner, and a cross support frame is fixedly connected between the multiple wave-damping plates and the inner wall of the anti-corrosion liner.

[0011] As a further description of the above technical solution: The outer surface of the baffle plate is provided with through holes and flow holes in sequence. There are several through holes, and the flow holes are located on the side close to the lower edge of the inner wall of the anti-corrosion liner.

[0012] As a further description of the above technical solution: A vacuum interlayer is provided between the inner wall of the main body of the storage tank and the outer wall of the inner tank.

[0013] This utility model has the following beneficial effects: 1. In this utility model, a multi-layer sealing assembly is used to achieve good heat insulation by utilizing the main body of the storage tank, the inner tank, the vacuum jacket, and the heat insulation jacket, thereby reducing heat transfer. Spring shock absorbers, pressure-bearing support components, and reinforced connecting components ensure structural stability and connection strength. The anti-corrosion inner liner enhances the safety of liquid hydrogen storage, thus achieving safe, stable, and heat-insulated storage of liquid hydrogen as a whole.

[0014] 2. In this utility model, the anti-wave assembly, which consists of anti-wave plates, cross support frames, through holes, and flow holes, can effectively reduce the impact caused by the sloshing of liquid hydrogen in the storage tank, ensuring storage stability. At the same time, it enables the flow of liquid hydrogen between the anti-wave plates, buffering and dispersing the impact force. Furthermore, the cross support frame enhances the structural strength of the anti-wave plates and improves the reliability of the overall structure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a multi-layer thermal insulation and sealing structure for a liquid hydrogen storage tank proposed in this utility model. Figure 2 This is a schematic cross-sectional view of the multi-layer thermal insulation and sealing structure of a liquid hydrogen storage tank proposed in this utility model. Figure 1 ; Figure 3 This is a schematic cross-sectional view of the multi-layer thermal insulation and sealing structure of a liquid hydrogen storage tank proposed in this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the inner tank spring shock absorber and pressure-bearing support components of a multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank proposed in this utility model.

[0016] Legend: 1. Tank body; 2. Multi-layer sealing assembly; 21. Inner tank body; 22. Spring shock absorber; 23. Pressure-bearing support component; 24. Reinforcing connector; 25. Corrosion-resistant inner liner; 26. Insulation jacket; 3. Wave-damping assembly; 31. Wave-damping plate; 32. Through hole; 33. Flow hole; 34. Cross support frame. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 2-4This utility model provides an embodiment of a multi-layered heat-insulating and sealing structure for a liquid hydrogen storage tank. The structure includes a tank body 1, which serves as the outer container for holding liquid hydrogen and provides basic support for the entire structure. Inside the tank body 1, a multi-layered sealing assembly 2 is installed. This assembly is the core component for achieving heat insulation and sealing functions. The multi-layered sealing assembly 2 includes an inner tank 21, which is located inside the tank body 1 and serves as the inner container for storing liquid hydrogen, providing initial containment and protection. A vacuum interlayer is provided between the inner wall of the storage tank body 1 and the outer wall of the inner tank body 21. The vacuum interlayer can effectively reduce heat transfer and achieve a heat insulation effect. A spring shock absorber 22 is fixedly connected to the outer wall of the inner tank body 21. The outer wall of the spring shock absorber 22 is fixedly connected to the inner wall of the storage tank body 1. There are multiple sets of spring shock absorbers 22, each set consisting of multiple spring shock absorbers 22 arranged in a ring. The multiple sets of spring shock absorbers 22 are evenly spaced along the length of the inner tank body 21. The spring shock absorbers 22 can buffer the impact between the storage tank body 1 and the outer wall of the inner tank body 21. To prevent vibration between the inner tank bodies 21 and ensure structural stability, two pressure-bearing support members 23 are fixedly connected to the ends of the inner tank bodies 21. These two support members 23 are mirror images of each other along the central axis of the main tank body 1, and their outer walls are fixedly connected to both ends of the inner wall of the main tank body 1. A reinforcing connector 24 is fixedly connected to the inner wall of the inner tank body 21. The reinforcing connector 24 connects the inner tank body 21 and the anti-corrosion inner liner 25, enhancing the connection strength between them. The inner wall of the inner tank 24 is fixedly connected to an anti-corrosion inner liner 25, which further protects the liquid hydrogen and improves the safety of storage. Multiple sets of reinforcing connectors 24 are provided, with each set consisting of multiple reinforcing connectors 24 arranged in a ring. The multiple sets of reinforcing connectors 24 are evenly spaced along the length between the inner tank 21 and the anti-corrosion inner liner 25. The outer wall of the anti-corrosion inner liner 25 and the inner wall of the inner tank 21 are provided with a heat insulation layer 26, which further enhances the heat insulation performance and reduces the impact of external heat on the liquid hydrogen.

[0019] Reference Figures 1-3The anti-corrosion inner liner 25 is equipped with a wave-damping component 3. The wave-damping component 3 is used to reduce the impact caused by the sloshing of liquid hydrogen in the storage tank and ensure the stability of storage. The wave-damping component 3 includes a wave-damping plate 31, which is the main component of the wave-damping component 3. The wave-damping plate 31 achieves the wave-damping function by blocking and guiding the flow of liquid hydrogen. The outer wall of the wave-damping plate 31 is fixedly connected to the inner wall of the anti-corrosion inner liner 25. Multiple wave-damping plates 31 are provided along the length of the anti-corrosion inner liner 25, and a cross support frame 34 is fixedly connected between the multiple wave-damping plates 31 and the inner wall of the anti-corrosion inner liner 25. The cross support frame 34 is used to support the wave-damping plates 31 and enhance the structural strength of the wave-damping plates 31. The outer surface of the wave-damping plate 31 is provided with through holes 32 and flow holes 33 in sequence. Several through holes 32 are provided, and the flow holes 33 are located on the side close to the lower edge of the inner wall of the anti-corrosion inner liner 25. The through holes 32 and flow holes 33 are used to allow liquid hydrogen to flow between the wave-damping plates 31, and at the same time play a role in buffering and dispersing the impact force.

[0020] Working principle: First, the main body of the storage tank 1 provides basic support as an external container. The multi-layer sealing components 2 inside achieve the core functions of heat insulation and sealing. The inner tank 21 serves as the inner liquid hydrogen container. The vacuum interlayer between the inner tank body 21 and the inner wall of the main body of the storage tank 1 reduces heat transfer and achieves preliminary heat insulation. Multiple sets of spring shock absorbers 22 are distributed in rings at equal intervals to buffer the vibration between the two and ensure structural stability. The pressure-bearing support 23 bears the end pressure of the inner tank 21 at both ends. Multiple sets of reinforcing connectors 24 connect the inner tank 21 and the anti-corrosion inner liner 25 in rings at equal intervals to enhance the connection strength. The anti-corrosion inner liner 25 further protects the liquid hydrogen. The heat insulation interlayer 26 between the inner tank 21 and the inner wall of the inner tank 21 enhances the heat insulation performance and reduces the influence of external heat. Inside the anti-corrosion inner liner 25, the anti-wave assembly 3, through the anti-wave plate 31 and the cross support frame 34, adopts multiple sets arranged along the length direction. By using the through holes 32 on the anti-wave plate 31 and the flow holes 33 near the lower edge of the inner wall, liquid hydrogen can flow while blocking and dispersing the impact force generated by its shaking, reducing the impact and ensuring storage stability. In summary, the structure achieves thermal insulation through a vacuum interlayer and an insulating interlayer 26, ensures structural stability through spring shock absorbers 22, pressure-bearing support components 23, and reinforcing connectors 24, and reduces the impact of liquid hydrogen through wave-damping components 3, thereby achieving safe, stable, and thermally insulated storage of liquid hydrogen.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer thermal insulation and sealing structure for a liquid hydrogen storage tank, comprising a tank body (1), characterized in that: The storage tank body (1) is provided with a multi-layer sealing assembly (2). The multi-layer sealing assembly (2) includes an inner tank (21), which is located inside the main body of the storage tank (1). A spring shock absorber (22) is fixedly connected to the outer wall of the inner tank (21). The outer wall of the spring shock absorber (22) is fixedly connected to the inner wall of the main body of the storage tank (1). A pressure-bearing support (23) is fixedly connected to the end of the inner tank (21). A reinforcing connector (24) is fixedly connected to the inner wall of the inner tank (21). An anti-corrosion inner liner (25) is fixedly connected to the inner wall of the reinforcing connector (24). An insulation interlayer (26) is provided between the outer wall of the anti-corrosion inner liner (25) and the inner wall of the inner tank (21). A wave-damping assembly (3) is provided inside the anti-corrosion inner liner (25).

2. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 1, characterized in that: The spring shock absorber (22) is provided in multiple groups, each group consisting of multiple spring shock absorbers (22) arranged in a ring, and the multiple groups of spring shock absorbers (22) are arranged at equal intervals along the length direction of the inner tank (21).

3. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 1, characterized in that: Two pressure-bearing support members (23) are provided. The two pressure-bearing support members (23) are mirrored along the central axis of the tank body (1), and the outer walls of the two pressure-bearing support members (23) are respectively fixedly connected to the two ends of the inner wall of the tank body (1).

4. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 1, characterized in that: The reinforcing connector (24) is provided in multiple groups, each group consisting of multiple reinforcing connectors (24) arranged in a ring, and the multiple groups of reinforcing connectors (24) are evenly distributed along the length direction between the inner tank (21) and the anti-corrosion inner liner (25).

5. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 1, characterized in that: The wave-damping assembly (3) includes a wave-damping plate (31). The outer wall of the wave-damping plate (31) is fixedly connected to the inner wall of the anti-corrosion inner liner (25). Multiple wave-damping plates (31) are provided along the length of the anti-corrosion inner liner (25), and a cross support frame (34) is fixedly connected between the multiple wave-damping plates (31) and the inner wall of the anti-corrosion inner liner (25).

6. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 5, characterized in that: The outer surface of the wave deflector (31) is provided with through holes (32) and flow holes (33) in sequence. There are several through holes (32), and the flow holes (33) are provided on the side close to the lower edge of the inner wall of the anti-corrosion inner liner (25).

7. The multi-layer thermal insulation sealing structure for a liquid hydrogen storage tank according to claim 1, characterized in that: A vacuum interlayer is provided between the inner wall of the main body (1) and the outer wall of the inner tank (21).

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