Double-layer liquid hydrogen storage tank

Abstract

The invention belongs to the technical field of liquid hydrogen storage tanks, and discloses a double-layer liquid hydrogen storage tank which comprises an outer layer, a feeding opening is fixedly formed in the top end of the outer layer, an inner layer is installed in the outer layer, and a supporting assembly is installed between the outer side of the inner layer and the outer layer; a plurality of circular rings are installed between the outer side of the inner layer and the outer layer, a plurality of reinforcing pieces are connected to the interiors of the circular rings in a penetrating mode, an outer heat insulation layer is installed at the position, located on the inner wall of the outer layer, between every two adjacent circular rings, and an outer arc-shaped plate is connected to the back face of each outer heat insulation layer in an attached mode; according to the liquid hydrogen storage tank, the overall structural stability of the liquid hydrogen storage tank can be remarkably improved, the problem that the storage tank deforms or is damaged when the storage tank is impacted by external force or the environment changes is solved, the bottom end supporting force of the inner layer is improved, and the problem that the strength is reduced possibly due to the fact that most of the inner layer is located in gaps is effectively solved; therefore, the durability and the safety of the inner layer are enhanced, and the liquid hydrogen storage tank can be stably and safely used for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid hydrogen storage tanks, and in particular relates to a double-layer liquid hydrogen storage tank. Background Art

[0002] In the field of liquid hydrogen storage tanks, liquid hydrogen is widely used in aerospace and cryogenic technology due to its extremely low boiling point and high energy density. However, in order to safely and efficiently store and transport liquid hydrogen, the design of the storage tank is crucial. A key technical challenge is how to effectively reduce the evaporation loss of liquid hydrogen in a low-temperature environment while ensuring the structural integrity of the storage tank under high pressure and low temperature conditions.

[0003] In the existing technology, although the single-layer liquid hydrogen storage tank has a simple structure, its evaporation rate is relatively high and cannot meet the high-efficiency requirements of long-term storage and transportation. In contrast, the double-layer liquid hydrogen storage tank significantly reduces evaporation losses and improves energy efficiency by forming a vacuum insulation layer between the inner and outer layers of the storage tank.

[0004] Since a vacuum insulation layer is used for insulation, but the inner and outer layers are not easy to support, the inner layer shakes, which in turn affects the distance between the inner and outer layers. Summary of the invention

[0005] The present invention aims at the problem that the vacuum insulation layer is used for heat insulation in the prior art, but the inner and outer layers are not easy to support, which causes the inner layer to shake, thereby affecting the distance between the inner and outer layers. The present invention proposes the following technical solution:

[0006] A double-layer liquid hydrogen storage tank, comprising: an outer layer, a feed port is fixedly installed on the top of the outer layer, an inner layer is installed inside the outer layer, and a support assembly is installed between the outer side of the inner layer and the outer layer;

[0007] A plurality of circular rings are installed at a position between the outer side of the inner layer and the outer layer, a plurality of reinforcing members are connected through the inside of the circular rings, an outer heat insulation layer is installed at the inner wall of the outer layer between two adjacent circular rings, an outer arc-shaped plate is bonded to the back side of the outer heat insulation layer, herringbone supporting plates are symmetrically fixedly installed on both sides of the bottom end of the outer arc-shaped plate, an inner arc-shaped plate is fixedly installed at one end of the herringbone supporting plate, and an inner heat insulation layer bonded to the outer side of the inner layer is fixedly installed on the inner side of the inner arc-shaped plate.

[0008] As a preferred embodiment of the above technical solution, mounting holes are equidistantly provided inside the circular ring, the reinforcement is installed inside the mounting holes, and the reinforcement is in the shape of a hollow cylinder.

[0009] As a preferred embodiment of the above technical solution, a heat dissipation chamber is provided between the outer side of the inner layer and the inner side of the outer layer, between the two circular rings, and the reinforcement is provided with a guide hole inside the heat dissipation chamber.

[0010] As a preferred embodiment of the above technical solution, arc corners are provided on the outer sides of the inner arc plate and the outer arc plate, and the reinforcement is located inside the arc corners of the inner arc plate and the outer arc plate.

[0011] As a preferred embodiment of the above technical solution, a clamping plate is installed between the inner arc plate and the outer arc plate, and clamping holes are opened inside the inner arc plate and the outer arc plate at positions corresponding to one end of the clamping plate, and the two ends of the clamping plate are respectively clamped and connected with the inner arc plate and the outer arc plate through the clamping holes.

[0012] As a preferred embodiment of the above technical solution, a partition plate is fixedly installed in the middle of the inner wall of the inner layer, a connecting pipe is embedded in the bottom end of the partition plate, and a piston column is slidably connected to the inside of the connecting pipe.

[0013] As a preferred embodiment of the above technical solution, inclined grooves are symmetrically provided on both sides of the inner wall of the connecting pipe, support rods are symmetrically fixedly installed at both ends of the connecting pipe, and a cylinder is fixedly installed between the two support rods.

[0014] As a preferred embodiment of the above technical solution, the piston column is sleeved on the outside of the cylinder, and the outside of the piston column and the inner wall of the connecting tube are in contact with each other.

[0015] As a preferred embodiment of the above technical solution, a positioning groove is provided in the middle of the outer surface of the piston column, and a sealing gasket is mounted on the outer side of the piston column and is clamped inside the positioning groove.

[0016] The beneficial effects of the present invention are:

[0017] (1) It can significantly improve the overall structural stability of the liquid hydrogen storage tank, prevent the tank from being deformed or damaged when subjected to external impact or environmental changes, and improve the bottom support force of the inner layer, effectively preventing the inner layer from being weakened due to the majority of the inner layer being located in the gap, thereby enhancing the durability and safety of the inner layer and ensuring that the liquid hydrogen storage tank can be used for a long time, stably and safely;

[0018] (2) It can effectively disperse external forces and avoid stress concentration in specific areas, which helps to extend the service life of liquid hydrogen storage tanks;

[0019] (3) It can significantly improve the thermal insulation performance of the double-layer liquid hydrogen storage tank, reduce the loss of cold energy, ensure the constant temperature of liquid hydrogen during storage, and extend the effective service life of the storage tank. In addition, through the design of different insulation layers and the arrangement of supporting structures, the thermal stress caused by temperature changes in the inner and outer layer materials is effectively managed, thereby extending the service life of the storage tank;

[0020] (4) Through the flow and exchange of gas between multiple chambers, the occurrence of local hot spots can be reduced, so that heat can be more evenly distributed in various parts of the heat dissipation system;

[0021] (5) By dividing the liquid hydrogen into multiple parts, the rate of uniform evaporation of the liquid hydrogen in the entire storage tank can be slowed down, thereby reducing the low-temperature evaporation loss, thereby improving the storage efficiency of the liquid hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic structural diagram of a double-layer liquid hydrogen storage tank in Example 1;

[0023] Figure 2 Shown is a cross-sectional view of a double-layer liquid hydrogen storage tank in Example 1;

[0024] Figure 3 What is shown is a schematic diagram of the structure of the support assembly in Example 1;

[0025] Figure 4 Shown is a front view of the support assembly in Example 1;

[0026] Figure 5 The structure diagram of the reinforcement member in Example 1 is shown;

[0027] Figure 6 Shown is a schematic structural diagram of the sealing gasket in Example 1.

[0028] In the figure: 1. outer layer; 2. feed port; 3. inner layer; 4. support assembly; 41. ring; 42. mounting hole; 43. reinforcement; 44. positioning hole; 45. outer insulation layer; 46. inner insulation layer; 47. inner arc plate; 48. herringbone support plate; 49. outer arc plate; 410. snap-in plate; 5. partition plate; 6. connecting pipe; 7. inclined groove; 8. support rod; 9. cylinder; 10. piston column; 11. sealing gasket. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0030] Example 1

[0031] The present invention provides a double-layer liquid hydrogen storage tank, such as Figures 1 to 6 As shown, it includes an outer layer 1, a feed port 2 is fixedly installed on the top of the outer layer 1, an inner layer 3 is installed inside the outer layer 1, a support assembly 4 is installed between the outer side of the inner layer 3 and the outer layer 1, and the outer layer 1, the inner layer 3 and the feed port 2 are combined to form a double-layer liquid hydrogen storage tank;

[0032] A plurality of circular rings 41 are installed at a position between the outer side of the inner layer 3 and the outer layer 1, a plurality of reinforcing members 43 are connected through the inside of the plurality of circular rings 41, an outer heat insulation layer 45 is installed between two adjacent circular rings 41 at the inner wall of the outer layer 1, an outer arc plate 49 is bonded to the back side of the outer heat insulation layer 45, herringbone support plates 48 are symmetrically fixedly installed on both sides of the bottom end of the outer arc plate 49, an inner arc plate 47 is fixedly installed at one end of the herringbone support plate 48, and an inner heat insulation layer 46 bonded to the outer side of the inner layer 3 is fixedly installed on the inner side of the inner arc plate 47.

[0033] like Figure 3 and Figure 4 As shown, mounting holes 42 are equidistantly provided inside the ring 41, and a reinforcement member 43 is installed inside the mounting hole 42. The reinforcement member 43 is in the shape of a hollow cylinder;

[0034] Personnel install the reinforcement 43 between the installation hole 42 and the ring 41 to fix the plurality of rings 41 , and through the hollow cylindrical reinforcement 43 , the gas can flow along the inside of the reinforcement 43 , so that the gas can be exchanged.

[0035] like Figure 3 and Figure 5 As shown, a heat dissipation chamber is set between the outer side of the inner layer 3 and the inner side of the outer layer 1 and between two circular rings 41, and a reinforcing member 43 is located inside the heat dissipation chamber and has a guide hole;

[0036] The gas flowing inside the reinforcement 43 enters the heat dissipation chamber along the guide holes, thereby allowing the gases inside multiple heat dissipation chambers to exchange, thereby keeping the temperatures inside the multiple heat dissipation chambers consistent, thereby preventing the problem of temperature deviation on the outside of the liquid hydrogen storage tank.

[0037] like Figure 3 and Figure 4 As shown, arc corners are provided on the outer sides of the inner arc plate 47 and the outer arc plate 49, the reinforcement member 43 is located inside the arc corners of the inner arc plate 47 and the outer arc plate 49, a clamping plate 410 is installed between the inner arc plate 47 and the outer arc plate 49, and clamping holes are provided inside the inner arc plate 47 and the outer arc plate 49 at positions corresponding to one end of the clamping plate 410, and both ends of the clamping plate 410 are clamped and connected with the inner arc plate 47 and the outer arc plate 49 through the clamping holes;

[0038] The clamping plate 410 is used to support the middle part of the inner arc plate 47 and the outer arc plate 49 to prevent deformation of the middle part of the inner arc plate 47 and the outer arc plate 49, and at the same time, under the action of the arc angle, the inner arc plate 47 outside the reinforcement 43 and the inner side of the outer arc plate 49 are fitted together, thereby achieving the purpose of positioning the inner arc plate 47 and the outer arc plate 49 and preventing the problem of displacement of the inner arc plate 47 and the outer arc plate 49.

[0039] like Figure 2 and Figure 6 As shown, a partition plate 5 is fixedly installed in the middle of the inner wall of the inner layer 3, a connecting pipe 6 is embedded in the bottom end of the partition plate 5, and a piston column 10 is slidably connected to the inside of the connecting pipe 6;

[0040] The inner layer 3 is divided into two spaces by the partition plate 5, and the liquid hydrogen in the two spaces of the inner layer 3 is allowed to flow by the connecting pipe 6 to change the flow difficulty, and the two sides are blocked by the piston column 10 to separate the two spaces and prevent the liquid hydrogen in the two spaces from being mixed.

[0041] like Figure 2 and Figure 6 As shown, inclined grooves 7 are symmetrically provided on both sides of the inner wall of the connecting pipe 6, support rods 8 are symmetrically fixedly installed at both ends of the connecting pipe 6, a cylinder 9 is fixedly installed between the two support rods 8, a piston column 10 is sleeved on the outside of the cylinder 9, the outside of the piston column 10 and the inner wall of the connecting pipe 6 fit each other, a positioning groove is provided in the middle of the outer surface of the piston column 10, and a sealing gasket 11 is clamped and installed inside the positioning groove on the outside of the piston column 10;

[0042] The cylinder 9 is fixed by the action of the two support rods 8, and the piston column 10 is limited by the action of the cylinder 9, so that the piston column 10 can only be displaced left and right but cannot swing. The sealing performance between the piston column 10 and the connecting pipe 6 is increased by the action of the sealing gasket 11, and the sealing gasket 11 is easily installed under the action of the positioning groove, which changes the difficulty of installing the sealing gasket 11.

[0043] Working principle: In actual use, the device supports the outer layer 1 and the inner layer 3 through the circular ring 41, so that the gap between the outer layer 1 and the inner layer 3 is supported, the bottom support force of the inner layer 3 is increased, and the problem of low strength of the inner layer 3 as a whole is prevented from occurring due to the outer side of the inner layer 3 being mostly in the gap. At this time, under the action of the reinforcement 43, the multiple circular rings 41 form a whole. The combined action of the circular rings 41 and the reinforcement 43 can significantly improve the overall structural stability of the liquid hydrogen storage tank, and prevent the storage tank from being deformed or damaged when subjected to external force impact or environmental changes. In addition, the bottom support force of the inner layer 3 is improved, and the strength reduction problem of the inner layer 3 due to being mostly in the gap is effectively prevented, thereby enhancing the durability and safety of the inner layer 3, ensuring that the liquid hydrogen storage tank can be used for a long time, stably and safely, and can also effectively disperse external forces to avoid stress concentration in specific areas, which helps to extend the service life of the liquid hydrogen storage tank.

[0044] In this process, the inner arc plate 47, the herringbone support plate 48 and the outer arc plate 49 are blocked, and then the clamping plate 410 is installed, so as to fix the outer arc plate 49 and the inner arc plate 47, and the outer arc plate 49 and the inner arc plate 47 are used to support the outer insulation layer 45 and the inner insulation layer 46. By adding the outer insulation layer 45 and the inner insulation layer 46 between the outer layer 1 and the inner layer 3, the thermal insulation performance of the double-layer liquid hydrogen storage tank can be significantly improved, the loss of cold capacity is reduced, the temperature of the liquid hydrogen is ensured to be constant during the storage process, and the effective use period of the storage tank is extended. In addition, through the design of different insulation layers and the arrangement of the support structure, the thermal stress caused by the temperature change of the inner and outer layer materials is effectively managed, and the service life of the storage tank is extended;

[0045] Finally, since the two rings 41 are combined to form a heat dissipation chamber, the gas inside the heat dissipation chamber changes. Since the gas expands and flows, the gas enters another heat dissipation chamber along the positioning hole 44 of the reinforcement 43, so that the gas inside multiple heat dissipation chambers is exchanged. Through the flow and exchange of gas between multiple chambers, the occurrence of local hot spots can be reduced, so that the heat can be more evenly distributed in various parts of the heat dissipation system.

[0046] Finally, along the feed port 2, into the liquid hydrogen storage tank composed of the outer layer 1 and the inner layer 3, since liquid hydrogen is added to the inner layer 3 at this time, as the liquid hydrogen is increasing, the height of the liquid hydrogen increases at this time, and as the height of the liquid hydrogen increases, the piston column 10 is driven to move along the outer side of the cylinder 9 and enter the other end of the partition plate 5, and at this time, the liquids inside the two partition plates 5 inside the inner layer 3 rise synchronously, so that the height of the liquid is consistent, and then stand still. At this time, during the standing process, the initial height of the liquid inside the inner layer 2 is the same. At this time, when the system reaches a state of equilibrium, the piston column 10 will stay at a position where the total weight of the liquid columns on both sides is equal. Since the density of the liquid is the same, the height of the liquid on both sides is the same, and the total weight of the liquid will also be the same. At this time, the piston column 10 is inside the connecting pipe 6, so that the liquid hydrogen inside the inner layer 3 is separated. By dividing the liquid hydrogen into multiple parts, the speed of uniform evaporation of liquid hydrogen in the entire storage tank can be slowed down, thereby reducing the low-temperature evaporation loss, and thus improving the storage efficiency of liquid hydrogen.

[0047] Next, when the liquid hydrogen on one side of the partition plate 5 is extracted, the liquid heights on both sides of the partition plate 5 are inconsistent. Since the higher the liquid height, the greater the pressure, the piston column 10 is pushed to move. When the piston column 10 moves, it drives the sealing gasket 11 to move. When the piston column 10 moves to the internal position of the inclined groove 7 of the connecting pipe 6, the liquid hydrogen with a higher liquid height enters the lower end along the connecting pipe 6. After placement, the liquid hydrogen heights on both sides of the two partition plates 5 are kept consistent. At this time, the piston column 10 is located in the middle area of ​​the connecting pipe 6.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A double-layer liquid hydrogen storage tank, characterized in that: include: An outer layer (1), a feed port (2) is fixedly mounted on the top of the outer layer (1), an inner layer (3) is mounted inside the outer layer (1), and a support assembly (4) is mounted between the outer side of the inner layer (3) and the outer layer (1); A plurality of circular rings (41) are installed at a position between the outer side of the inner layer (3) and the outer layer (1), a plurality of reinforcing members (43) are connected and penetrated inside the plurality of circular rings (41), an outer heat insulation layer (45) is installed between two adjacent circular rings (41) at the inner wall of the outer layer (1), an outer arc-shaped plate (49) is bonded to the back of the outer heat insulation layer (45), herringbone support plates (48) are symmetrically fixedly installed on both sides of the bottom end of the outer arc-shaped plate (49), an inner arc-shaped plate (47) is fixedly installed at one end of the herringbone support plate (48), and an inner heat insulation layer (46) bonded to the outer side of the inner layer (3) is fixedly installed on the inner side of the inner arc-shaped plate (47).

2. A double-layer liquid hydrogen storage tank according to claim 1, characterized in that: The circular ring (41) is provided with mounting holes (42) at equal intervals, and the reinforcing member (43) is installed inside the mounting holes (42). The reinforcing member (43) is in the shape of a hollow cylinder.

3. A double-layer liquid hydrogen storage tank according to claim 1, characterized in that: A heat dissipation chamber is provided between the outer side of the inner layer (3) and the inner side of the outer layer (1) and between the two circular rings (41), and the reinforcement member (43) is provided with a guide hole inside the heat dissipation chamber.

4. A double-layer liquid hydrogen storage tank according to claim 1, characterized in that: The outer sides of the inner arc plate (47) and the outer arc plate (49) are both provided with arc corners, and the reinforcing member (43) is located inside the arc corners of the inner arc plate (47) and the outer arc plate (49).

5. A double-layer liquid hydrogen storage tank according to claim 4, characterized in that: A clamping plate (410) is installed between the inner arc plate (47) and the outer arc plate (49); clamping holes are respectively provided inside the inner arc plate (47) and the outer arc plate (49) at positions corresponding to one end of the clamping plate (410); and two ends of the clamping plate (410) are respectively clamped and connected to the inner arc plate (47) and the outer arc plate (49) through the clamping holes.

6. A double-layer liquid hydrogen storage tank according to claim 1, characterized in that: A partition plate (5) is fixedly installed in the middle of the inner wall of the inner layer (3), a connecting pipe (6) is embedded in the bottom end of the partition plate (5), and a piston column (10) is slidably connected to the inside of the connecting pipe (6) to the left and right.

7. A double-layer liquid hydrogen storage tank according to claim 6, characterized in that: The inner wall of the connecting pipe (6) is symmetrically provided with inclined grooves (7), and support rods (8) are symmetrically fixedly installed at both ends of the connecting pipe (6), and a cylinder (9) is fixedly installed between the two support rods (8).

8. A double-layer liquid hydrogen storage tank according to claim 6, characterized in that: The piston column (10) is sleeved on the outside of the cylinder (9), and the outside of the piston column (10) and the inner wall of the connecting pipe (6) are in contact with each other.

9. A double-layer liquid hydrogen storage tank according to claim 6, characterized in that: A positioning groove is provided in the middle of the outer surface of the piston column (10), and a sealing gasket (11) is mounted on the outer side of the piston column (10) and is clamped inside the positioning groove.

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