Supporting structure for movable end of horizontal liquid hydrogen storage tank and horizontal liquid hydrogen storage tank

Abstract

The utility model discloses a supporting structure for a movable end of a horizontal liquid hydrogen storage tank, which comprises an inner seal head fixing pipe, an outer seal head fixing pipe, a convex circle and an epoxy glass cloth plate, and one end of the inner seal head fixing pipe is used for being fixedly connected with an inner seal head of the liquid hydrogen storage tank; the outer seal head fixing pipe is used for being fixedly embedded in an outer seal head of the liquid hydrogen storage tank, the end, away from an inner seal head of the liquid hydrogen storage tank, of the outer seal head fixing pipe is closed, and the end, away from the inner seal head of the liquid hydrogen storage tank, of the inner seal head fixing pipe is coaxially arranged in the outer seal head fixing pipe in a penetrating mode. The convex circle is coaxially sleeved outside the inner sealing head fixing pipe in a sliding manner, and the inner wall of the convex circle is in linear contact with the outer wall of the inner sealing head fixing pipe; the epoxy glass cloth plate is in a circular ring shape, the epoxy glass cloth plate is coaxially arranged outside the convex circle in a sleeved mode, and the outer wall of the epoxy glass cloth plate is connected with the inner wall of the outer end socket fixing pipe in a sealed mode. The heat conduction phenomenon can be effectively handled on the basis of ensuring the supporting effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid hydrogen storage and transportation technical field, concretely relates to a support structure for movable end of horizontal liquid hydrogen storage tank and horizontal liquid hydrogen storage tank. BACKGROUND

[0002] Hydrogen fuel cell vehicles use hydrogen as a power source, and liquid hydrogen or supercritical hydrogen as fuel, with the advantages of high energy density, short refueling time, strong endurance, and zero carbon emissions. Currently, the main hydrogen refueling stations in China use high-pressure hydrogen as the gas source, usually at a pressure of 35MPa. Hydrogen refueling stations with a refueling pressure of 70MPa are still in the early stages. Simply relying on high-pressure hydrogen refueling has the problem of low hydrogen density. At 35MPa, the normal temperature hydrogen density is about 25kg / m 3 , and at 70MPa, the normal temperature hydrogen density is about 41kg / m 3 . This makes the transportation, storage, and refueling of hydrogen inefficient, affecting the economy of hydrogen fuel cell vehicles. In contrast, liquid hydrogen has a density of 72kg / m 3 at a temperature of -253℃, so refueling with liquid hydrogen can improve the efficiency of hydrogen transportation, storage, and refueling. However, liquid hydrogen is prone to heat absorption and vaporization in the vehicle-mounted storage tank, causing dispersion loss and even safety accidents. Supercritical hydrogen can solve the problem of liquid hydrogen vaporization, and has a high storage density and lower storage pressure than high-pressure hydrogen, so it is considered a future direction for the development of hydrogen energy.

[0003] In order to adapt to the loading and transportation of liquid hydrogen, horizontal liquid hydrogen storage tanks are currently widely used for loading, and are generally designed as a double-layer structure to improve thermal insulation performance. An insulating layer is sandwiched between the inner and outer layers, so that the inner layer will inevitably shrink after being filled with liquid hydrogen, causing the inner layer to slide inward relative to the outer layer, especially at the two ends (i.e. the movable ends) of the horizontal liquid hydrogen storage tank. Therefore, a support structure is generally needed at the movable ends to prevent the inner and outer layers from sliding excessively and failing to reset. However, heat conduction will inevitably occur at the support structure, which is not conducive to the thermal insulation of the liquid hydrogen stored in the inner layer, causing an increase in the evaporation rate of the liquid hydrogen. SUMMARY

[0004] The purpose of the utility model is to provide a support structure for the movable ends of a horizontal liquid hydrogen storage tank, which can effectively address the heat conduction phenomenon while ensuring support effectiveness.

[0005] The utility model is implemented by the following technical solutions:

[0006] A support structure for the movable end of a horizontal liquid hydrogen storage tank includes an inner head fixing tube, one end of which is fixedly connected to the inner head of the liquid hydrogen storage tank; an outer head fixing tube, which is used to fix and embed the outer head of the liquid hydrogen storage tank, with the end of the outer head fixing tube away from the inner head of the liquid hydrogen storage tank being closed, and the end of the inner head fixing tube away from the inner head of the liquid hydrogen storage tank being coaxially inserted inside the outer head fixing tube; a convex circle, which is coaxially slidably sleeved on the outside of the inner head fixing tube, with the inner wall of the convex circle in line contact with the outer wall of the inner head fixing tube; and an epoxy glass cloth plate, which is annular in shape and coaxially sleeved on the outside of the convex circle, with the outer wall of the epoxy glass cloth plate being sealed to the inner wall of the outer head fixing tube.

[0007] Optionally, the inner end of the inner end of the fixing tube extends outward to form an inner end reinforcing plate. The shape of the inner end reinforcing plate matches the surface of the inner end of the liquid hydrogen storage tank. The inner end reinforcing plate is attached to and fixedly connected to the surface of the inner end of the liquid hydrogen storage tank.

[0008] Optionally, the sidewall of the outer head fixing tube extends outward to form an outer head reinforcing plate. The shape of the outer head reinforcing plate matches the surface of the outer head of the liquid hydrogen storage tank. The outer head reinforcing plate is attached to and fixedly connected to the surface of the outer head of the liquid hydrogen storage tank.

[0009] Optionally, the sidewall of the end of the convex circle away from the inner end cap of the liquid hydrogen storage tank extends outward to form a limiting edge, the outer diameter of which is larger than the inner diameter of the epoxy glass cloth plate.

[0010] Optionally, a first positioning ring is coaxially fitted at one end of the convex circle near the inner end of the liquid hydrogen storage tank. The inner wall of the first positioning ring is fixedly connected to the outer wall of the convex circle, so that the inner ring of the epoxy glass cloth plate is sandwiched between the first positioning ring and the limiting edge. The outer diameter of the first positioning ring is much smaller than the inner diameter of the outer end fixing tube.

[0011] Optionally, a second positioning ring is coaxially fitted inside the outer end cap fixing tube. The outer diameter of the second positioning ring matches the inner diameter of the outer end cap fixing tube. The outer wall of the second positioning ring is fixedly connected to the inner wall of the outer end cap fixing tube. The second positioning ring abuts against the outer ring on one side of the epoxy glass cloth board. The inner diameter of the second positioning ring is much larger than the outer diameter of the convex circle.

[0012] Optionally, a third positioning ring is coaxially fitted inside the outer end cap fixing tube. The outer diameter of the third positioning ring matches the inner diameter of the outer end cap fixing tube. The outer wall of the third positioning ring is fixedly connected to the inner wall of the outer end cap fixing tube. The third positioning ring abuts against the outer ring of one side of the epoxy glass cloth board, so that the outer ring of the epoxy glass cloth board is sandwiched between the second positioning ring and the third positioning ring. The inner diameter of the third positioning ring is much larger than the outer diameter of the convex circle.

[0013] A horizontal liquid hydrogen storage tank includes: a tank body, wherein the movable end of the tank body is provided with an inner end cap and an outer end cap from the inside to the outside; any of the above-mentioned support structures for the movable end of the horizontal liquid hydrogen storage tank, wherein the inner end of the inner end cap fixing tube is fixedly connected to the inner end cap, and the outer end cap fixing tube is fixedly embedded in the outer end cap.

[0014] Optionally, a high-vacuum multilayer insulation layer is sandwiched between the inner end cap and the outer end cap.

[0015] Optionally, the high-vacuum multilayer insulation layer is made of alternating layers of low-temperature insulation paper and aluminum foil.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] This utility model provides a support structure for the movable end of a horizontal liquid hydrogen storage tank. It features an inner and outer end-cap fixing pipe, which are fixedly connected to the inner and outer end caps respectively, thus fixing them to the inner and outer layers of the tank. These pipes are coaxially fitted together, with a convex dome and an epoxy fiberglass cloth plate coaxially fitted between them. This allows the inner end-cap fixing pipe to slide coaxially with the convex dome. When the inner layer contracts freely, the coaxial sliding between the inner end-cap fixing pipe and the convex dome compensates for this contraction. Simultaneously, the inner end-cap fixing pipe remains coaxially connected to the convex dome to maintain the stability of the inner and outer layer structure and prevent excessive slippage that could prevent repositioning. Furthermore, by establishing line contact between the inner end-cap fixing pipe and the convex dome, thermal conductivity is reduced, effectively addressing heat conduction between the inner and outer layers and stabilizing the evaporation rate of liquid hydrogen in the inner layer. The epoxy fiberglass cloth plate also provides insulation, further suppressing heat conduction between the inner and outer layers. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 A partial side sectional view of the support structure for the movable end of a horizontal liquid hydrogen storage tank provided in an embodiment of this utility model;

[0020] Figure 2 This is a partially enlarged schematic diagram of the contact point between the convex circle of the support structure for the movable end of a horizontal liquid hydrogen storage tank and the inner head fixing pipe, provided in an embodiment of this utility model.

[0021] The attached diagram shows the markings and corresponding component names:

[0022] 1-Inner end cap; 2-Outer end cap; 3-High vacuum multilayer insulation layer; 10-Inner end cap fixing tube; 11-Inner end cap reinforcing plate; 20-Outer end cap fixing tube; 21-Outer end cap reinforcing plate; 30-Convex circle; 31-Limiting edge; 32-First positioning ring; 33-Second positioning ring; 34-Third positioning ring; 40-Epoxy glass cloth board. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0024] Example

[0025] Please refer to Figure 1 and Figure 2 This embodiment provides a support structure for the movable end of a horizontal liquid hydrogen storage tank, including an inner end cap fixing tube 10, one end of which is fixedly connected to the inner end cap of the liquid hydrogen storage tank; and an outer end cap fixing tube 20, which is used to fix the outer end cap embedded in the liquid hydrogen storage tank. The end of the outer end cap fixing tube 20 away from the inner end cap of the liquid hydrogen storage tank is closed, and the end of the inner end cap fixing tube 10 away from the inner end cap of the liquid hydrogen storage tank is coaxially inserted. The first part is located inside the outer end cap fixing tube 20; the second part includes a convex circle 30, which is coaxially slidably sleeved on the outside of the inner end cap fixing tube 10, and the inner wall of the convex circle 30 is in line contact with the outer wall of the inner end cap fixing tube 10; the third part includes an epoxy glass cloth plate 40, which is annular, and is coaxially sleeved on the outside of the convex circle 30, and the outer wall of the epoxy glass cloth plate 40 is sealed to the inner wall of the outer end cap fixing tube 20.

[0026] The support structure for the movable end of a horizontal liquid hydrogen storage tank provided in this embodiment uses an inner head fixing tube 10 and an outer head fixing tube 20, which are fixedly connected to the inner and outer heads respectively, thus fixing them to the inner and outer layers of the storage tank respectively. The two tubes are coaxially fitted together, with a convex circle 30 and an epoxy fiberglass cloth plate 40 coaxially fitted between them. This allows the inner head fixing tube 10 to slide coaxially with the convex circle 30. When the inner layer contracts freely, the coaxial sliding of the inner head fixing tube 10 and the convex circle 30 facilitates this process. To compensate for the free shrinkage of the inner layer, the inner end cap fixing tube 10 is always coaxially connected with the convex circle 30 to maintain the stability of the inner and outer layer structures and prevent excessive slippage between the inner and outer layers from failing to return to their original positions. On this basis, by setting a line contact between the inner end cap fixing tube 10 and the convex circle 30, the thermal conductivity is reduced, effectively addressing the thermal conduction phenomenon between the inner and outer layers and stabilizing the evaporation rate of liquid hydrogen in the inner layer. At the same time, the epoxy glass cloth plate 40 can also play a role in heat insulation, further suppressing the thermal conduction between the inner and outer layers.

[0027] To enhance the structural strength of the connection between the inner head fixing tube 10 and the inner head, and to prevent the inner head fixing tube 10 from radially tilting, the side wall of the inner end of the inner head fixing tube 10 extends outward to form an inner head reinforcing plate 11. The shape of the inner head reinforcing plate 11 matches the surface of the inner head of the liquid hydrogen storage tank, and the inner head reinforcing plate 11 is attached to and fixedly connected to the surface of the inner head of the liquid hydrogen storage tank.

[0028] To enhance the structural strength of the connection between the outer head fixing tube 20 and the outer head, and to prevent the outer head fixing tube 20 from radially tilting, the side wall of the outer head fixing tube 20 extends outward to form an outer head reinforcing plate 21. The shape of the outer head reinforcing plate 21 matches the surface of the outer head of the liquid hydrogen storage tank, and the outer head reinforcing plate 21 is attached to and fixedly connected to the surface of the outer head of the liquid hydrogen storage tank.

[0029] In order to axially limit the epoxy glass cloth plate 40, the side wall of the end of the convex circle 30 away from the inner head of the liquid hydrogen storage tank extends outward to form a limiting edge 31, the outer diameter of the limiting edge 31 being larger than the inner diameter of the epoxy glass cloth plate 40.

[0030] To further limit the axial movement of the inner ring of the epoxy glass cloth plate 40, a first positioning ring 32 is coaxially fitted at one end of the convex circle 30 near the inner end cap of the liquid hydrogen storage tank. The inner wall of the first positioning ring 32 is fixedly connected to the outer wall of the convex circle 30, so that the inner ring of the epoxy glass cloth plate 40 is sandwiched between the first positioning ring 32 and the limiting edge 31. The outer diameter of the first positioning ring 32 is much smaller than the inner diameter of the outer end cap fixing tube 20.

[0031] To further limit the axial positioning of the outer ring of the epoxy glass cloth board 40, a second positioning ring 33 is coaxially fitted inside the outer end fixing tube 20. The outer diameter of the second positioning ring 33 matches the inner diameter of the outer end fixing tube 20, the outer wall of the second positioning ring 33 is fixedly connected to the inner wall of the outer end fixing tube 20, and the second positioning ring 33 abuts against the outer ring on one side of the epoxy glass cloth board 40. The inner diameter of the second positioning ring 33 is much larger than the outer diameter of the convex circle 30.

[0032] To further limit the axial positioning of the outer ring of the epoxy glass cloth board 40, a third positioning ring 34 is coaxially fitted inside the outer end fixing tube 20. The outer diameter of the third positioning ring 34 matches the inner diameter of the outer end fixing tube 20, and the outer wall of the third positioning ring 34 is fixedly connected to the inner wall of the outer end fixing tube 20. The third positioning ring 34 abuts against the outer ring on one side of the epoxy glass cloth board 40, so that the outer ring of the epoxy glass cloth board 40 is sandwiched between the second positioning ring 33 and the third positioning ring 34. The inner diameter of the third positioning ring 34 is much larger than the outer diameter of the convex circle 30.

[0033] This embodiment also provides a horizontal liquid hydrogen storage tank, including: a tank body, wherein the movable end of the tank body is provided with an inner end cap 1 and an outer end cap 2 from the inside to the outside; and a second supporting structure including any of the above-mentioned supporting structures for the movable end of the horizontal liquid hydrogen storage tank, wherein the inner end of the inner end cap fixing tube 10 is fixedly connected to the inner end cap 1, and the outer end cap fixing tube 20 is fixedly embedded in the outer end cap 2.

[0034] Preferably, a high-vacuum multilayer heat insulation layer 3 is sandwiched between the inner end cap 1 and the outer end cap 2.

[0035] Preferably, the high-vacuum multilayer insulation layer 3 is woven from alternating layers of low-temperature insulation paper and aluminum foil.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A support structure for the movable end of a horizontal liquid hydrogen storage tank, characterized in that, include: An inner head fixing tube (10) is provided, one end of which is used to be fixedly connected to the inner head of the liquid hydrogen storage tank. An outer head fixing tube (20) is used to fix the outer head embedded in the liquid hydrogen storage tank. The outer head fixing tube (20) is closed at one end away from the inner head of the liquid hydrogen storage tank. The inner head fixing tube (10) is coaxially inserted into the outer head fixing tube (20) at one end away from the inner head of the liquid hydrogen storage tank. A convex circle (30) is coaxially slidably sleeved on the outside of the inner head fixing tube (10), and the inner wall of the convex circle (30) is in line contact with the outer wall of the inner head fixing tube (10). Epoxy glass cloth board (40), the epoxy glass cloth board (40) is circular, the epoxy glass cloth board (40) is coaxially sleeved on the outside of the convex circle (30), and the outer wall of the epoxy glass cloth board (40) is sealed to the inner wall of the outer end cap fixing tube (20).

2. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 1, characterized in that, The inner end of the inner end of the fixing tube (10) extends outward to form an inner end reinforcing plate (11). The shape of the inner end reinforcing plate (11) matches the surface of the inner end of the liquid hydrogen storage tank. The inner end reinforcing plate (11) is attached to and fixedly connected to the surface of the inner end of the liquid hydrogen storage tank.

3. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 2, characterized in that, The sidewall of the outer head fixing tube (20) extends outward to form an outer head reinforcing plate (21). The shape of the outer head reinforcing plate (21) matches the surface of the outer head of the liquid hydrogen storage tank. The outer head reinforcing plate (21) is attached to and fixedly connected to the surface of the outer head of the liquid hydrogen storage tank.

4. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 1, characterized in that, The sidewall of the end of the convex circle (30) away from the inner head of the liquid hydrogen storage tank extends outward to form a limiting edge (31), the outer diameter of which is larger than the inner diameter of the epoxy glass cloth plate (40).

5. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 4, characterized in that, The convex circle (30) is coaxially fitted with a first positioning ring (32) at one end near the inner end of the liquid hydrogen storage tank. The inner wall of the first positioning ring (32) is fixedly connected to the outer wall of the convex circle (30) so that the inner ring of the epoxy glass cloth plate (40) is sandwiched between the first positioning ring (32) and the limiting edge (31). The outer diameter of the first positioning ring (32) is much smaller than the inner diameter of the outer end cap fixing tube (20).

6. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 5, characterized in that, The outer end fixing tube (20) is coaxially fitted with a second positioning ring (33). The outer diameter of the second positioning ring (33) matches the inner diameter of the outer end fixing tube (20). The outer wall of the second positioning ring (33) is fixedly connected to the inner wall of the outer end fixing tube (20). The second positioning ring (33) abuts against the outer ring on one side of the epoxy glass cloth board (40). The inner diameter of the second positioning ring (33) is much larger than the outer diameter of the convex circle (30).

7. The support structure for the movable end of a horizontal liquid hydrogen storage tank according to claim 6, characterized in that, A third positioning ring (34) is coaxially fitted inside the outer end fixing tube (20). The outer diameter of the third positioning ring (34) matches the inner diameter of the outer end fixing tube (20). The outer wall of the third positioning ring (34) is fixedly connected to the inner wall of the outer end fixing tube (20). The third positioning ring (34) abuts against the outer ring on one side of the epoxy glass cloth board (40) so that the outer ring of the epoxy glass cloth board (40) is sandwiched between the second positioning ring (33) and the third positioning ring (34). The inner diameter of the third positioning ring (34) is much larger than the outer diameter of the convex circle (30).

8. A horizontal liquid hydrogen storage tank, characterized in that, include: The tank body, wherein the movable end of the tank body is provided with an inner end cap (1) and an outer end cap (2) from the inside to the outside; The support structure for the movable end of a horizontal liquid hydrogen storage tank according to any one of claims 1-7, wherein the inner end of the inner head fixing tube (10) is fixedly connected to the inner head (1), and the outer head fixing tube (20) is fixedly embedded in the outer head (2).

9. The horizontal liquid hydrogen storage tank according to claim 8, characterized in that, A high-vacuum multilayer heat insulation layer (3) is sandwiched between the inner end cap (1) and the outer end cap (2).

10. The horizontal liquid hydrogen storage tank according to claim 9, characterized in that, The high-vacuum multilayer insulation layer (3) is made of alternating low-temperature insulation paper and aluminum foil.

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