Portable liquid hydrogen storage tank

Abstract

The utility model discloses a portable liquid hydrogen storage tank, which comprises an outer tank, an inner tank and an inner tank, the inner tank is arranged in the outer tank, the inner tank is of a hollow structure, and the interior of the inner tank is used for storing liquid hydrogen; the vacuum nozzle is arranged on the outer tank and communicated with the inner cavity of the outer tank, and the vacuum nozzle is used for being connected with a vacuumizing assembly; and the supporting piece is arranged between the outer tank and the inner tank and is used for positioning the inner tank. According to the portable liquid hydrogen storage tank, the contact area between the inner tank and the outer tank can be reduced through the supporting pieces, the inner tank and the outer tank are vacuumized, heat exchange between the inner tank and the external environment can be greatly reduced, and the heat preservation effect of the inner tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen storage equipment, and more specifically, to a portable liquid hydrogen storage tank. Background Art

[0002] With the rapid development of the hydrogen energy industry, liquid hydrogen, a clean energy carrier with high energy density and low operating pressure, has become a key research area in its storage and supply technologies. As the core equipment for liquid hydrogen storage, the insulation performance of liquid hydrogen storage tanks directly affects the storage efficiency, safety, and economic viability of liquid hydrogen. However, existing liquid hydrogen storage tanks generally have shortcomings in terms of insulation performance. First, the extremely low temperature of liquid hydrogen, approximately -253°C, places extremely high demands on the thermal insulation performance of the storage tanks. The insulation materials used in traditional storage tanks often cannot maintain effective thermal insulation performance at such low temperatures. This leads to the evaporation of liquid hydrogen during storage due to heat conduction, resulting in energy loss and safety hazards. Second, the insulation structure design of liquid hydrogen storage tanks is often inadequate. Factors such as the thickness of the insulation layer, material selection, and construction quality directly affect the insulation performance. Existing storage tanks may have problems such as insufficient thickness, high thermal conductivity of the material, and poor construction, resulting in suboptimal insulation performance.

[0003] In summary, how to improve the thermal insulation performance of liquid hydrogen storage tanks is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a portable liquid hydrogen storage tank, the inner tank of which is used to store liquid hydrogen, the inner tank and the outer tank are positioned by a support, and the inner tank and the outer tank are vacuumed by a vacuum nozzle to reduce the intensity of heat conduction and heat convection.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A portable liquid hydrogen storage tank, comprising:

[0007] The outer tank is a hollow structure;

[0008] An inner tank is provided inside the outer tank, the inner tank being a hollow structure and being used to store liquid hydrogen;

[0009] a vacuum nozzle, provided on the outer tank and in communication with the inner cavity of the outer tank, the vacuum nozzle being used to connect to a vacuum pumping assembly;

[0010] A support member is provided between the outer tank and the inner tank and is used to position the inner tank to prevent the outer tank from directly contacting the inner tank.

[0011] Preferably, the support member includes a first support member and a second support member, the first support member is an annular structure and is arranged on the inner wall of the outer tank, the first support member is provided with a plurality of pointed ends abutting against the inner tank, the first support member is used to achieve circumferential limitation of the inner tank, and the second support member is arranged on the central axis of the first support member and abuts against the inner tank.

[0012] Preferably, the end of the second support member in contact with the inner tank is a pointed end, and the first support member and the second support member are both thermal insulation components.

[0013] Preferably, the inner wall of the outer tank is provided with a composite reflective layer for reducing heat radiation.

[0014] Preferably, a heat insulation layer is provided between the outer tank and the inner tank.

[0015] Preferably, a filling pipe is further included, wherein the filling pipe is provided between the outer tank and the inner tank, and both ends of the filling pipe are respectively connected to the interior of the inner tank and the exterior of the outer tank.

[0016] Preferably, the inner wall of the filling pipe is provided with a heat-insulating coating.

[0017] Preferably, the outer periphery of the filling pipe is provided with a heat-insulating sleeve.

[0018] Preferably, the filling tube is a spiral tube.

[0019] Preferably, it further comprises a vacuum detection component, wherein the detection head of the vacuum detection component is arranged between the outer tank and the inner tank.

[0020] The utility model provides a portable liquid hydrogen storage tank, wherein an outer tank is provided on the outside of an inner tank, and a vacuum nozzle is provided on the outer tank. A support is provided inside the outer tank, and the support can realize the positioning of the inner tank to avoid direct contact between the inner tank and the outer tank. On this basis, the gas between the outer tank and the inner tank is extracted from the vacuum nozzle through the vacuum assembly, so that the outer tank and the inner tank are in a vacuum state. Therefore, the inner tank and the outer tank cannot directly contact each other and can only transfer a small amount of heat through the support. In this way, the heat exchange between the inner tank and the external environment can be greatly reduced, and the thermal insulation effect of the inner tank is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 This is a cross-sectional view of the portable liquid hydrogen storage tank provided by the present utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the portable liquid hydrogen storage tank provided by the utility model.

[0024] Reference numerals:

[0025] 1-outer tank; 2-inner tank; 3-vacuum nozzle; 4-support member; 401-first support member; 402-second support member; 5-filling tube. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The core of the utility model is to provide a portable liquid hydrogen storage tank, which improves the heat preservation capacity of the inner tank by vacuuming.

[0028] It should be noted that the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application.

[0029] The present application provides a portable liquid hydrogen storage tank comprising: an outer tank 1, an inner tank 2, a vacuum nozzle 3 and a support member 4;

[0030] Among them, the outer tank 1 is a hollow structure;

[0031] The inner tank 2 is arranged inside the outer tank 1. The inner tank 2 is a hollow structure and its interior is used to store liquid hydrogen;

[0032] The vacuum nozzle 3 is provided on the outer tank 1 and communicates with the inner cavity of the outer tank 1. The vacuum nozzle 3 is used to connect the vacuum pumping component;

[0033] The support member 4 is provided between the outer tank 1 and the inner tank 2 and is used to position the inner tank 2 to prevent the outer tank 1 from directly contacting the inner tank 2 .

[0034] Specifically, the inner tank 2 and the outer tank 1 are both hollow components. The inner tank 2 is arranged in the outer tank 1. The inner tank 2 is positioned by the support 4 and prevents the inner tank 2 from directly contacting the outer tank 1. The setting of the support 4 can greatly reduce the contact area between the outer tank 1 and the inner tank 2, and can reduce the heat transfer path between the two. A vacuum nozzle 3 is provided on the surface of the outer tank 1, which is connected to the vacuum assembly through the vacuum nozzle 3. The vacuum assembly can vacuum the space between the inner tank 2 and the outer tank 1. In this way, heat cannot be transferred between the inner tank 2 and the outer tank 1 through the air, reducing the heat conduction and convection of air molecules.

[0035] Optionally, the support member 4 can be made of a material with a low thermal conductivity, such as polystyrene, which can significantly reduce the heat transfer between the inner tank 2 and the support member 4.

[0036] Based on the above embodiment, the support member 4 includes a first support member 401 and a second support member 402. The first support member 401 is an annular structure and is arranged on the inner wall of the outer tank 1. The first support member 401 is provided with multiple pointed ends that abut against the inner tank 2. The first support member 401 is used to achieve circumferential limitation of the inner tank 2. The second support member 402 is arranged on the central axis of the first support member 401 and abuts against the inner tank 2.

[0037] Specifically, both the inner tank 2 and the outer tank 1 are cylindrical structures, and there are at least two first support members 401, and the two first support members 401 are sleeved on the outer circumference of the inner tank 2 from both sides of the outer tank 1, and the inner ring of each first support member 401 is provided with at least three tips, and the three tips are distributed along the circumference of the inner tank 2. Similarly, please refer to the attached Figure 2 As shown, four tips are provided in the first support member 401, and the four tips can also play a supporting role. In addition, it should be noted that the number of tips should not be set too much to reduce the contact area between the first support member 401 and the inner tank 2, and the sharp part abuts against the inner tank 2, which can greatly reduce the contact area between the inner tank 2 and the tips and reduce heat transfer.

[0038] On the basis of the above embodiment, the end of the second support member 402 in contact with the inner tank 2 is a pointed end, and the first support member 401 and the second support member 402 are both thermal insulation components.

[0039] Specifically, there are also two second support members 402, which are respectively arranged at the two axial ends inside the outer tank 1. The ends of the two second support members 402 that contact the inner tank 2 are also pointed, which can also greatly reduce the contact area between the second support members 402 and the inner tank 2. The first support member 401 and the second support member 402 are both made of insulating materials to reduce the heat exchange between the inner tank 2 and the first support member 401 and the second support member 402.

[0040] In some embodiments, the inner wall of the outer tank 1 is provided with a composite reflective layer for reducing heat radiation.

[0041] Specifically, the inner wall of the outer tank 1 can be silver-plated or multiple layers of high reflectivity materials, such as ceramic coatings or metal foils, can be added to form a composite reflective layer, which can effectively reduce the heat radiation of the inner tank 2 to the external environment.

[0042] In some embodiments, a heat insulation layer is provided between the outer tank 1 and the inner tank 2 .

[0043] Specifically, the thermal insulation layer adopts a multi-layer composite structure, including high-efficiency thermal insulation materials, to ensure good thermal insulation effect under different temperature gradients to reduce heat radiation and thus insulate the inner tank.

[0044] Optionally, the thermal insulation layer may include but is not limited to thermal insulation components with low thermal conductivity such as vacuum insulation panels, aerogels, and polyurethane foams.

[0045] In some embodiments, a filling pipe 5 is further included. The filling pipe 5 is arranged between the outer tank 1 and the inner tank 2. Both ends of the filling pipe 5 are connected to the interior of the inner tank 2 and the exterior of the outer tank 1 respectively.

[0046] For details, please refer to the attached Figure 1 A filling port is provided on the outer tank 1, through which liquid hydrogen is introduced into the filling pipe 5, and the liquid hydrogen is introduced into the inner tank 2 from the filling pipe 5 to realize the filling of liquid hydrogen.

[0047] On the basis of the above embodiment, the inner wall of the filling pipe 5 is provided with a heat-insulating coating.

[0048] Specifically, a coating with low thermal conductivity is applied to the inner wall of the filling tube 5 to further reduce heat conduction, such as a ceramic coating or metal foil, which can reduce heat transfer during the liquid hydrogen filling process.

[0049] In some embodiments, the outer periphery of the filling tube 5 is provided with an insulating sleeve.

[0050] Specifically, a layer of high-efficiency thermal insulation sleeve, such as a vacuum thermal insulation pipe or thermal insulation material, is wrapped around the outside of the filling pipe 5 to isolate the liquid hydrogen in the filling pipe 5 from the influence of the external environment through the thermal insulation sleeve.

[0051] Optionally, the insulation sleeve may be made of a material with a low thermal conductivity such as polystyrene or polyurethane foam.

[0052] On the basis of the above embodiment, the filling tube 5 is a spiral tube.

[0053] Specifically, the filling tube 5 is a spiral capillary tube. The spiral capillary tube structure requires the fluid to flow along a spiral path when flowing in the tube. The spiral capillary tube increases the path length of the fluid flow, prolongs the time that the liquid hydrogen stays in the filling tube 5, and slows down the flow rate of the liquid hydrogen in the filling tube. The spiral capillary tube increases the flow path of the liquid hydrogen between the inner tank 2 and the outer tank 1, so that the liquid hydrogen can reduce heat loss before reaching the inner tank 2. At the same time, it reduces the heat exchange between the inner tank 2 and the outside of the tank body through the filling tube 5.

[0054] In some embodiments, a vacuum detection component is also included, and a detection head of the vacuum detection component is arranged between the outer tank 1 and the inner tank 2.

[0055] Specifically, the vacuum detection component includes a detection head and a main body. The detection head is generally arranged between the outer tank 1 and the inner tank 2. The vacuum detection component can detect the vacuum degree between the outer tank 1 and the inner tank 2. When in use, it ensures that the vacuum degree between the inner tank 2 and the outer tank 1 is maintained at a high level for a long time to minimize the heat conduction and convection effects of residual gas molecules, and timely compensation when the vacuum degree drops to maintain a stable vacuum environment.

[0056] Optionally, the vacuum detection component can use a capacitance film vacuum gauge, an ionization vacuum gauge, a magnetron discharge method vacuum detector and other detection instruments. The specific selection should be determined based on the budget and the compatibility with the storage tank.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The portable liquid hydrogen storage tank provided by the present invention is introduced in detail above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A portable liquid hydrogen storage tank, characterized in that: include: The outer tank (1) is a hollow structure; An inner tank (2) is arranged inside the outer tank (1), the inner tank (2) being a hollow structure and having an interior for storing liquid hydrogen; A vacuum nozzle (3) is provided on the outer tank (1) and is in communication with the inner cavity of the outer tank (1), and the vacuum nozzle (3) is used to connect a vacuum pumping component; A support member (4) is provided between the outer tank (1) and the inner tank (2) and is used to achieve positioning of the inner tank (2) to prevent the outer tank (1) from directly contacting the inner tank (2).

2. The portable liquid hydrogen storage tank according to claim 1, characterized in that: The support member (4) comprises a first support member (401) and a second support member (402). The first support member (401) is an annular structure and is arranged on the inner wall of the outer tank (1). The first support member (401) is provided with a plurality of pointed ends abutting against the inner tank (2). The first support member (401) is used to achieve circumferential positioning of the inner tank (2). The second support member (402) is arranged on the central axis of the first support member (401) and abuts against the inner tank (2).

3. The portable liquid hydrogen storage tank according to claim 2, characterized in that: The end of the second support member (402) in contact with the inner tank (2) is a pointed end, and the first support member (401) and the second support member (402) are both heat-insulating components.

4. The portable liquid hydrogen storage tank according to claim 1, characterized in that: The inner wall of the outer tank (1) is provided with a composite reflective layer for reducing heat radiation.

5. The portable liquid hydrogen storage tank according to claim 1, characterized in that: A heat insulation layer is provided between the outer tank (1) and the inner tank (2).

6. The portable liquid hydrogen storage tank according to claim 1, characterized in that: It also includes a filling pipe (5), which is arranged between the outer tank (1) and the inner tank (2), and the two ends of the filling pipe (5) are respectively connected to the inside of the inner tank (2) and the outside of the outer tank (1).

7. The portable liquid hydrogen storage tank according to claim 6, characterized in that: The inner wall of the filling pipe (5) is provided with a heat-insulating coating.

8. The portable liquid hydrogen storage tank according to claim 6, characterized in that: The outer periphery of the filling pipe (5) is provided with a heat-insulating sleeve.

9. The portable liquid hydrogen storage tank according to claim 7 or 8, characterized in that: The filling tube (5) is a spiral tube.

10. The portable liquid hydrogen storage tank according to claim 1, characterized in that: It also includes a vacuum detection component, wherein a detection head of the vacuum detection component is arranged between the outer tank (1) and the inner tank (2).

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