Liquid hydrogen cylinders and hydrogen fuel cell systems

Abstract

The present invention discloses a liquid hydrogen cylinder and a hydrogen fuel cell system. The liquid hydrogen cylinder includes: an inner cylinder and an outer cylinder, wherein the inner cylinder is installed in the outer cylinder and is radially spaced apart from the outer cylinder; an insulating support assembly, wherein the insulating support assembly is radially supported between the inner cylinder and the outer cylinder, and the insulating support assembly includes a first support structure and a second support structure arranged axially spaced apart from each other along the inner cylinder; wherein the outer end of the first support structure is fixedly connected to the outer cylinder and the inner end is slidably engaged with the inner cylinder, and the outer end and inner end of the second support structure are fixedly connected to the outer cylinder and the inner cylinder, respectively. The liquid hydrogen cylinder of the present invention can stably support the inner cylinder within the outer cylinder by providing the first support structure and the second support structure for radial support between the inner cylinder and the outer cylinder. This support method is conducive to reducing the heat leakage of the liquid hydrogen cylinder and ensuring the insulating performance of the cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of gas supply systems, and in particular to a liquid hydrogen cylinder and a hydrogen fuel cell system having the liquid hydrogen cylinder. Background Art

[0002] Hydrogen fuel cell systems have broad application prospects in the powertrain field of heavy-duty vehicles. Onboard liquid hydrogen cylinders are used to provide the required fuel to the onboard hydrogen storage system. A support structure is required between the inner and outer cylinders of the onboard liquid hydrogen cylinders. Traditional cylinder support structures use neck tubes at both ends. This has the disadvantage of high heat leakage, which affects the insulation performance of the cylinders. Furthermore, the support structure is complex and inconvenient to install, leaving room for improvement. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a liquid hydrogen cylinder having an inner cylinder and an outer cylinder radially supported by an insulating support assembly, which has a simple structure, minimizes heat leakage, and facilitates ensuring the thermal insulation performance of the cylinder.

[0004] According to an embodiment of the present invention, a liquid hydrogen cylinder includes: an inner cylinder and an outer cylinder, wherein the inner cylinder is installed in the outer cylinder and is radially spaced apart from the outer cylinder; a thermal insulation support assembly, wherein the thermal insulation support assembly is radially supported between the inner cylinder and the outer cylinder, and the thermal insulation support assembly includes a first support structure and a second support structure arranged and spaced apart along the axial direction of the inner cylinder; wherein the outer end of the first support structure is fixedly connected to the outer cylinder and the inner end is slidably engaged with the inner cylinder, and the outer end and inner end of the second support structure are fixedly connected to the outer cylinder and the inner cylinder, respectively.

[0005] According to the liquid hydrogen cylinder of an embodiment of the present invention, by providing a first support structure and a second support structure for radial support between the inner cylinder and the outer cylinder, the inner cylinder can be stably supported within the outer cylinder. This support method is also conducive to reducing the heat leakage of the liquid hydrogen cylinder and ensuring the thermal insulation performance of the cylinder.

[0006] According to some embodiments of the liquid hydrogen cylinder of the present invention, the first supporting structure includes: a first insulating pipe fitting; a first sleeve assembly, the first sleeve assembly is sleeved on the inner end of the first insulating pipe fitting, and the first sleeve assembly is slidably matched with the inner tube; and a second sleeve assembly, the second sleeve assembly is sleeved on the outer end of the first insulating pipe fitting, and the second sleeve assembly is fixedly connected to the outer tube.

[0007] According to some embodiments of the liquid hydrogen cylinder of the present invention, the first sleeve assembly includes a first sleeve, a first pad and a sliding pad, the first pad and the sliding pad are stacked and connected, and the first sleeve is arranged on a side of the first pad away from the sliding pad; wherein the first sleeve is sleeved on the inner end of the first insulating pipe, and the sliding pad is slidably fitted with the outer peripheral wall of the inner cylinder.

[0008] According to some embodiments of the liquid hydrogen cylinder of the present invention, the second sleeve assembly includes a second sleeve and a second pad, and the second sleeve is connected to the side of the second pad facing the inner cylinder; wherein the outer cylinder is provided with a first mounting hole, the second pad is fitted and fixed to the outer circumferential wall of the outer cylinder, and the second sleeve passes through the first mounting hole and extends into the outer cylinder to be connected to the first insulating pipe fitting.

[0009] According to some embodiments of the liquid hydrogen cylinder of the present invention, the first insulating pipe fitting includes a first insulating pipe and a first insulating member and a second insulating member installed in the first insulating pipe, and the two ends of the first insulating pipe are respectively socketed with the first sleeve assembly and the second sleeve assembly; the first insulating member and the second insulating member are distributed in sequence from the inside to the outside along the radial direction of the inner cylinder, and the thickness of the first insulating member is less than the thickness of the second insulating member.

[0010] According to some embodiments of the liquid hydrogen cylinder of the present invention, the second supporting structure includes: a second insulating pipe fitting; a third sleeve assembly, the third sleeve assembly is sleeved on the inner end of the second insulating pipe fitting, and the third sleeve assembly is fixedly connected to the inner tube; and a fourth sleeve assembly, the fourth sleeve assembly is sleeved on the outer end of the second insulating pipe fitting, and the fourth sleeve assembly is fixedly connected to the outer tube.

[0011] According to some embodiments of the liquid hydrogen cylinder of the present invention, the third sleeve assembly includes a third sleeve and a third pad, and the third sleeve is arranged on the side of the third pad away from the inner tube; wherein the third sleeve is arranged on the inner end of the second insulation pipe, and the third pad is fixedly connected to the outer peripheral wall of the inner tube.

[0012] According to some embodiments of the liquid hydrogen cylinder of the present invention, the fourth sleeve assembly includes a fourth sleeve and a fourth pad, and the fourth sleeve is connected to the side of the fourth pad facing the inner cylinder; wherein the outer cylinder is provided with a second mounting hole, the fourth pad is fitted and fixed to the outer circumferential wall of the outer cylinder, and the fourth sleeve passes through the second mounting hole to extend into the outer cylinder and is connected to the second insulating pipe fitting.

[0013] According to some embodiments of the liquid hydrogen cylinder of the present invention, the second insulating pipe fitting includes a second insulating pipe and a third insulating member and a fourth insulating member installed in the second insulating pipe, and both ends of the second insulating pipe are respectively socketed with the third sleeve assembly and the fourth sleeve assembly; the third insulating member and the fourth insulating member are distributed in sequence from the inside to the outside along the radial direction of the inner cylinder, and the thickness of the third insulating member is less than the thickness of the fourth insulating member.

[0014] The present invention also provides a hydrogen fuel cell system.

[0015] A hydrogen fuel cell system according to an embodiment of the present invention is provided with the liquid hydrogen cylinder according to any one of the above embodiments.

[0016] The advantages of the hydrogen fuel cell system and the above-mentioned liquid hydrogen cylinder over the prior art are the same and will not be described in detail here.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a liquid hydrogen cylinder according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Cross-section at AA;

[0021] Figure 3 yes Figure 2 Enlarged view of point C in the middle;

[0022] Figure 4 yes Figure 2 Cross-section at DD;

[0023] Figure 5 yes Figure 4 Cross-section at EE;

[0024] Figure 6 yes Figure 1 Cross-section at the middle BB;

[0025] Figure 7 yes Figure 6 Enlarged view of point F in the middle;

[0026] Figure 8 yes Figure 6 Cross-section at GG;

[0027] Figure 9 yes Figure 8 Cross-section at HH;

[0028] Figure 10 Schematic diagram of the end portion of a liquid hydrogen cylinder according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] Liquid hydrogen cylinder 100,

[0031] Insulation support assembly 1,

[0032] First support structure 11, first thermal insulation pipe 111, first thermal insulation pipe 1111, first thermal insulation member 1112, second thermal insulation member 1113, first sleeve assembly 112, first sleeve 1121, first pad 1122, sliding pad 1123, second sleeve assembly 113, second sleeve 1131, second pad 1132,

[0033] The second supporting structure 12, the second insulating pipe 121, the second insulating pipe 1211, the third insulating member 1212, the fourth insulating member 1213, the third sleeve assembly 122, the third sleeve 1221, the third pad 1222, the fourth sleeve assembly 123, the fourth sleeve 1231, the fourth pad 1232,

[0034] Bolt 21, nut 22, spring washer 23, countersunk bolt 24,

[0035] Inner tube 3 , outer tube 4 , first mounting hole 41 , second mounting hole 42 . DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] Reference below Figures 1-10 A liquid hydrogen cylinder 100 according to an embodiment of the present invention is described. The inner tube 3 and the outer tube 4 of the liquid hydrogen cylinder 100 are radially installed and supported by an insulating support assembly 1. The structure is simple and the installation is convenient. In addition, the actual heat leakage generated by the radial support through the insulating support assembly 1 is smaller than the heat leakage in the traditional form of neck tube support at the head and tail, which is beneficial to ensuring the insulation performance of the cylinder.

[0038] like Figures 1-10 As shown, the liquid hydrogen cylinder 100 according to an embodiment of the present invention includes: an inner cylinder 3, an outer cylinder 4 and an insulating support assembly 1.

[0039] like Figure 1 As shown, the inner cylinder 3 is installed in the outer cylinder 4, that is, the inner cylinder 3 forms the internal containing space of the liquid hydrogen cylinder 100 for storing liquid hydrogen, and the outer cylinder 4 forms the outer shell of the liquid hydrogen cylinder 100 to protect the inner cylinder 3 located inside and ensure the internal stability of the liquid hydrogen cylinder 100.

[0040] Among them, such as Figure 1 As shown, the inner cylinder 3 and the outer cylinder 4 are radially spaced apart, meaning there is no direct contact between the inner cylinder 3 and the outer cylinder 4. This allows the outer cylinder 4 to collapse and deform to a certain extent into the space between the inner cylinder 3 and the outer cylinder 4 when subjected to an external force, thereby absorbing the external impact force and preventing direct rigid contact between the outer cylinder 4 and the inner cylinder 3, thereby ensuring the safety of the inner cylinder 3. Furthermore, there is no direct heat conduction between the inner cylinder 3 and the outer cylinder 4, thereby reducing heat leakage from the inner cylinder 3 and ensuring the thermal insulation performance of the liquid hydrogen cylinder 100.

[0041] The thermal insulation support assembly 1 is radially supported between the inner cylinder 3 and the outer cylinder 4, and the thermal insulation support assembly 1 includes a first support structure 11 and a second support structure 12 arranged at intervals along the axial direction of the inner cylinder 3, that is, the inner cylinder 3 and the outer cylinder 4 can be installed and supported by the first support structure 11 and the second support structure 12 at the same time, thereby achieving support and fixation at different positions of the inner cylinder 3 along the axial direction, thereby improving the support stability of the inner cylinder 3 and the outer cylinder 4.

[0042] In the specific design, the first supporting structure 11 and the second supporting structure 12 can be set to multiple to ensure the stability of the support. Figure 2 As shown, the number of first support structures 11 can be four, and the four first support structures 11 are spaced apart and distributed in the circumferential direction of the inner cylinder 3 to support different positions in the circumferential direction of the inner cylinder 3. Specifically, Figure 2 As shown, two first support structures 11 are located above the outer peripheral wall of the inner tube 3, and the two first support structures 11 are symmetrically distributed on the left and right sides of the upper part of the inner tube 3, and the angle between the two first support structures 11 and the vertical direction (only indicating the direction in the figure, not limiting the actual design) can be 45°; the other two first support structures 11 are located below the outer peripheral wall of the inner tube 3, and the two first support structures 11 are symmetrically distributed on the left and right sides of the lower part of the inner tube 3, and the two first support structures 11 relative to the vertical direction (only indicating the direction in the figure, not limiting the actual design) can be 45°. Figure 2 The included angle (in the middle direction, which does not limit the actual design) can be 30°. Figure 6 As shown, the second support structure 12 can also be provided in four pieces, and the four second support structures 12 are spaced apart and distributed in the circumferential direction of the inner cylinder 3 to support different positions in the circumferential direction of the inner cylinder 3. Specifically, Figure 6As shown, two second support structures 12 are located above the outer peripheral wall of the inner tube 3, and the two second support structures 12 are symmetrically distributed on the left and right sides of the upper part of the inner tube 3, and the angle between the two second support structures 12 and the vertical direction (only indicating the direction in the figure, not limiting the actual design) can be 45°; the other two second support structures 12 are located below the outer peripheral wall of the inner tube 3, and the two second support structures 12 are symmetrically distributed on the left and right sides of the lower part of the inner tube 3, and the two second support structures 12 relative to the vertical direction (only indicating the direction in the figure, not limiting the actual design) can be 45°. Figure 6 The included angle (in the middle direction, which does not limit the actual design) can be 30°.

[0043] In this way, the multiple first support structures 11 and the multiple second support structures 12 can simultaneously support the inner cylinder 3 and the outer cylinder 4, thereby ensuring the relative stability of the inner cylinder 3 and the outer cylinder 4. In a specific design, the multiple first support structures 11 and the multiple second support structures 12 can be arranged in a one-to-one correspondence in the axial direction of the inner cylinder 3, so that the supporting force at each axial position of the inner cylinder 3 is relatively balanced.

[0044] The outer end of the first support structure 11 is fixedly connected to the outer cylinder 4, meaning that the outer end of the first support structure 11 is always in a relatively stable state with the outer cylinder 4, and the relative position of the two remains unchanged. The inner end of the first support structure 11 is in sliding engagement with the inner cylinder 3, meaning that the inner end of the first support structure 11 can slide to different positions relative to the inner cylinder 3. Simultaneously, the outer end of the second support structure 12 is fixedly connected to the outer cylinder 4, meaning that the outer end of the second support structure 12 is always in a relatively stable state with the outer cylinder 4, and the relative position of the two remains unchanged. The inner end of the second support structure 12 is fixedly connected to the inner cylinder 3, meaning that the inner end of the second support structure 12 is always in a relatively stable state with the inner cylinder 3. That is to say, the first support structure 11 and the second support structure 12 are both fixed relative to the outer tube 4, while the first support structure 11 can slide relative to the inner tube 3, and the second support structure 12 is fixed relative to the inner tube 3. In this way, when the inner tube 3 changes due to the internal temperature state and produces deformation due to thermal expansion and contraction, the second support structure 12 is always stably connected between the inner tube 3 and the outer tube 4, and the first support structure 11 can not only play a supporting role between the inner tube 3 and the outer tube 4, but also can slide relatively with the deformation of the inner tube 3, so that the insulation support assembly 1 can adapt to the deformation of the inner tube 3 caused by temperature changes, thereby avoiding the situation where the insulation support assembly 1 cannot reasonably adapt to the temperature changes of the inner tube 3 and the structural deformation and unstable support occur, thereby improving the stability of the liquid hydrogen cylinder 100.

[0045] Insulating material may be provided in the thermal insulation support assembly 1 so that the insulating material can play an insulating role between the inner cylinder 3 and the outer cylinder 4, thereby preventing excessive heat in the liquid hydrogen stored in the inner cylinder 3 from being transferred to the outer cylinder 4 and diffused to the outside, reducing heat leakage of the inner cylinder 3, and ensuring the thermal insulation performance of the liquid hydrogen cylinder 100. The thermal insulation support assembly 1 has a simple structure and is easy to install.

[0046] According to the liquid hydrogen cylinder 100 of the embodiment of the present invention, by providing a first support structure 11 and a second support structure 12 for radial support between the inner cylinder 3 and the outer cylinder 4, the inner cylinder 3 can be stably supported in the outer cylinder 4. This support method is conducive to reducing the heat leakage of the liquid hydrogen cylinder 100 and ensuring the thermal insulation performance of the cylinder.

[0047] In some embodiments, as Figure 3 As shown, the first supporting structure 11 includes a first thermal insulation pipe 111 , a first sleeve assembly 112 and a second sleeve assembly 113 .

[0048] The first sleeve assembly 112 is sleeved onto the inner end of the first thermally insulating pipe 111. That is, the inner end of the first thermally insulating pipe 111 extends into the first sleeve assembly 112 to be fixedly connected to the first sleeve assembly 112. For example, the inner end of the first thermally insulating pipe 111 can be connected to the first sleeve assembly 112 via a connecting structure or welded. The first sleeve assembly 112 is slidably engaged with the inner tube 3. For example, the inner surface of the first sleeve assembly 112 contacts the outer circumferential wall of the inner tube 3 and can slide relative to it. In this way, both the first thermally insulating pipe 111 and the first sleeve assembly 112 can slide relative to the inner tube 3.

[0049] The second sleeve assembly 113 is sleeved on the outer end of the first thermally insulating pipe 111, that is, the outer end of the first thermally insulating pipe 111 extends into the second sleeve assembly 113 to be fixedly connected to the second sleeve assembly 113, for example, the outer end of the first thermally insulating pipe 111 and the second sleeve assembly 113 are connected via a connecting structure or by welding; the second sleeve assembly 113 is fixedly connected to the outer tube 4, for example, the second sleeve assembly 113 can be welded to the outer tube 4. In this way, the relative positions of the second thermally insulating pipe 121, the second sleeve assembly 113, and the outer tube 4 can be kept fixed.

[0050] In some embodiments, as Figure 4As shown, the first sleeve assembly 112 includes a first sleeve 1121, a first pad 1122 and a sliding pad 1123, wherein the first sleeve 1121 is constructed as a circular tube, and the inner diameter of the first sleeve 1121 is larger than and close to the outer diameter of the inner end of the first thermal insulation pipe 111, so that the first thermal insulation pipe 111 can extend into the first sleeve 1121 and be fixedly connected to the first sleeve 1121. The first pad 1122 is fixedly connected to the first sleeve 1121, for example, by welding the first pad 1122 and the first sleeve 1121, or the two can be integrally formed, such as Figure 4 As shown, the first sleeve 1121 is located on the side of the first pad 1122 away from the sliding pad 1123. The first pad 1122 and the sliding pad 1123 can be connected by a connecting piece, such as Figure 4 and Figure 5 As shown, the two are fixedly connected by countersunk bolts 24, and as shown Figure 10 The location of the countersunk bolts 24 is shown.

[0051] like Figure 4 As shown, the first sleeve 1121 is sleeved on the inner end of the first thermal insulation pipe 111, so that the first sleeve assembly 112 and the first thermal insulation pipe 111 are relatively fixed, and the two can be connected as a whole and installed between the inner tube 3 and the outer tube 4. Among them, the sliding pad 1123 is located on the side of the first pad 1122 facing the inner tube 3, and after specific installation, the sliding pad 1123 slides with the outer peripheral wall of the inner tube 3. Figure 4 As shown, the first sleeve 1121 is connected to the first thermal insulation pipe 111 by means of bolts 21, nuts 22 and spring washers 23, so that the first sleeve 1121 and the first thermal insulation pipe 111 can be relatively disassembled.

[0052] It should be noted that sliding pad 1123 is made of a wear-resistant and low-temperature-resistant material to ensure that it remains in good structural condition even after prolonged sliding relative to inner tube 3. For example, sliding pad 1123 utilizes a modified polytetrafluoroethylene gasket, leveraging the material's low coefficient of friction to reduce friction between the inner tube 3 and the support during thermal expansion and contraction, thereby improving the fatigue resistance of the support structure. Furthermore, first sleeve 1121 utilizes an epoxy glass tube, leveraging its low thermal conductivity to effectively reduce heat leakage from the support.

[0053] In some embodiments, the second sleeve assembly 113 includes a second sleeve 1131 and a second backing plate 1132. The second sleeve 1131 is constructed in a circular tubular shape, and the inner diameter of the second sleeve 1131 is larger than and closer to the outer diameter of the outer end of the first thermally insulating pipe 111, so that the first thermally insulating pipe 111 can extend into the second sleeve 1131 and be fixedly connected to the second sleeve 1131. The second sleeve 1131 and the second backing plate 1132 are fixedly connected, for example, the end of the second sleeve 1131 can be welded to the surface of the second backing plate 1132, or the two can be integrally formed, so that the second sleeve 1131 and the second backing plate 1132 can be used together. The second sleeve 1131 and the second backing plate 1132 are connected to the side facing the inner tube 3.

[0054] like Figure 3 As shown, the outer cylinder 4 is provided with a first mounting hole 41, and the first mounting hole 41 penetrates radially along the peripheral wall of the outer cylinder 4. During actual installation, the second sleeve 1131 can be extended from the outside of the outer cylinder 4 through the first mounting hole 41 to the inside of the outer cylinder 4 to be connected to the first thermal insulation pipe 111, so that the second sleeve 1131 is fixedly connected to the first thermal insulation pipe 111, and the second pad 1132 is located outside the outer cylinder 4, and the width of the second pad 1132 is larger than the aperture of the first mounting hole 41, so that the second pad 1132 can play a sealing role outside the first mounting hole 41, and the second pad 1132 is attached to the outer peripheral wall of the outer cylinder 4 and welded fixed.

[0055] In some embodiments, as Figure 4 and Figure 5 As shown, the first thermal insulation pipe 111 includes a first thermal insulation pipe 1111, a first thermal insulation member 1112 and a second thermal insulation member 1113. The first thermal insulation member 1112 and the second thermal insulation member 1113 are installed in the first thermal insulation pipe 1111. The first thermal insulation pipe 1111 is used to connect with the first sleeve 1121 and the second sleeve 1131, that is, the inner end of the first thermal insulation pipe 1111 extends into the first sleeve 1121. Figure 4 and Figure 5 As shown, the inner end of the first insulation tube 1111 is detachably connected to the first sleeve 1121 by a bolt 21, a nut 22 and a spring washer 23, so that the first insulation tube 1111 and the first sleeve 1121 can be flexibly disassembled and assembled, and the outer end of the first insulation tube 1111 extends into the second sleeve 1131 and can be welded to the second sleeve 1131 to achieve a fixed connection between the two.

[0056] The first and second thermal insulators 1112 and 1113 provide insulation between the inner and outer cylinders 3 and 4, preventing excess heat from being transferred from the inner cylinder 3 to the outer cylinder 4, thereby reducing heat leakage from the liquid hydrogen cylinder 100. Furthermore, the second sleeve 1131, made of epoxy glass tubing, effectively reduces heat leakage at the support due to its low thermal conductivity.

[0057] The first and second insulating members 1112, 1113 are arranged radially from the inside outward along the inner tube 3. Specifically, the first insulating member 1112 is located inside the second insulating member 1113. This means that when heat is transferred from the inside out of the inner tube 3, it must pass through the first and second insulating members 1112, 1113, respectively. This increases the difficulty of heat transfer. Furthermore, the thickness of the first insulating member 1112 is smaller than that of the second insulating member 1113, allowing the first insulating member 1112 to not only provide insulation but also provide a certain buffering effect. The first and second insulating members 1113 are made of different materials to provide different structural properties. For example, the first insulating member 1112 is a double-layer structure, with one layer being aluminum foil and the other being fiberglass paper, while the second insulating member 1113 is made of fiberglass wool.

[0058] In some embodiments, as Figure 6 As shown, the second supporting structure 12 includes a second thermal insulation pipe 121 , a third sleeve assembly 122 and a fourth sleeve assembly 123 .

[0059] The third sleeve assembly 122 is sleeved onto the inner end of the second thermally insulating pipe 121. That is, the inner end of the second thermally insulating pipe 121 extends into the third sleeve assembly 122 to be fixedly connected to the third sleeve assembly 122. For example, the inner end of the second thermally insulating pipe 121 can be connected to the third sleeve assembly 122 via a connecting structure or by welding. The third sleeve assembly 122 is fixedly connected to the inner tube 3, for example, by welding the inner surface of the third sleeve assembly 122 to the outer circumferential wall of the inner tube 3. In this way, both the second thermally insulating pipe 121 and the third sleeve assembly 122 can be fixed relative to the inner tube 3.

[0060] The fourth sleeve assembly 123 is sleeved on the outer end of the second thermally insulating pipe 121, that is, the outer end of the second thermally insulating pipe 121 extends into the fourth sleeve assembly 123 to be fixedly connected to the fourth sleeve assembly 123. For example, the outer end of the second thermally insulating pipe 121 and the fourth sleeve assembly 123 are connected via a connecting structure or welded. The fourth sleeve assembly 123 is fixedly connected to the outer tube 4, for example, the fourth sleeve assembly 123 can be welded to the outer tube 4. In this way, the relative positions of the second thermally insulating pipe 121 and the fourth sleeve assembly 123 and the outer tube 4 can be kept fixed.

[0061] In some embodiments, as Figure 7 and Figure 8As shown, the third sleeve assembly 122 includes a third sleeve 1221 and a third backing plate 1222, wherein the third sleeve 1221 is constructed in a circular tubular shape, and the inner diameter of the third sleeve 1221 is larger than and close to the outer diameter of the inner end of the second thermal insulation pipe 121, so that the second thermal insulation pipe 121 can extend into the third sleeve 1221 and be fixedly connected to the third sleeve 1221. The third backing plate 1222 is fixedly connected to the third sleeve 1221, for example, by welding the third backing plate 1222 and the third sleeve 1221, or the two can be integrally formed.

[0062] like Figure 7 、 Figure 8 and Figure 9 As shown, the third sleeve 1221 is sleeved on the inner end of the second heat-insulating pipe 121, so that the third sleeve assembly 122 and the second heat-insulating pipe 121 are relatively fixed, and the two can be connected as a whole and installed between the inner tube 3 and the outer tube 4. Figure 7 and Figure 8 As shown, the third sleeve 1221 is connected to the second insulating pipe 121 by bolts 21, nuts 22 and spring washers 23, so that the third sleeve 1221 and the second insulating pipe 121 can be relatively disassembled, wherein the third pad 1222 can be welded to the outer wall of the inner tube 3.

[0063] In some embodiments, as Figure 7 As shown, the fourth sleeve assembly 123 includes a fourth sleeve 1231 and a fourth backing plate 1232. The fourth sleeve 1231 is constructed in a circular tubular shape, and the inner diameter of the fourth sleeve 1231 is larger than and close to the outer diameter of the outer end of the second thermally insulating pipe 121, so that the second thermally insulating pipe 121 can extend into the fourth sleeve 1231 and be fixedly connected to the fourth sleeve 1231. The fourth sleeve 1231 and the fourth backing plate 1232 are fixedly connected. For example, the end of the fourth sleeve 1231 can be welded to the surface of the fourth backing plate 1232, or the two can be integrally formed, so that the fourth sleeve 1231 and the fourth backing plate 1232 can be used together. The fourth sleeve 1231 and the fourth backing plate 1232 are connected to the side facing the inner cylinder 3.

[0064] like Figure 7 As shown, the outer cylinder 4 is provided with a second mounting hole 42, and the second mounting hole 42 penetrates radially along the peripheral wall of the outer cylinder 4. During actual installation, the fourth sleeve 1231 can be extended from the outside of the outer cylinder 4 through the second mounting hole 42 to the inside of the outer cylinder 4 to be connected with the second thermal insulation pipe 121, so that the fourth sleeve 1231 is fixedly connected to the second thermal insulation pipe 121, and the fourth pad 1232 is located outside the outer cylinder 4, and the width of the fourth pad 1232 is larger than the aperture of the second mounting hole 42, so that the fourth pad 1232 can play a sealing role outside the second mounting hole 42, and the fourth pad 1232 is attached to the outer peripheral wall of the outer cylinder 4 and welded fixed.

[0065] In some embodiments, as Figure 8 and Figure 9 As shown, the second thermal insulation pipe 121 includes a second thermal insulation pipe 1211, a third thermal insulation member 1212, and a fourth thermal insulation member 1213. The third thermal insulation member 1212 and the fourth thermal insulation member 1213 are installed in the second thermal insulation pipe 1211. The second thermal insulation pipe 1211 is used to connect and cooperate with the third sleeve 1221 and the fourth sleeve 1231. That is, the inner end of the second thermal insulation pipe 1211 extends into the third sleeve 1221 and is detachably connected to the third sleeve 1221 by a bolt 21, a nut 22, and a spring washer 23, so that the second thermal insulation pipe 1211 and the third sleeve 1221 can be flexibly disassembled and assembled, and the outer end of the second thermal insulation pipe 1211 extends into the fourth sleeve 1231 and is welded to the fourth sleeve 1231 to achieve a fixed connection between the two.

[0066] Among them, the third insulation member 1212 and the fourth insulation member 1213 can play a role of insulation between the inner tube 3 and the outer tube 4 to prevent excessive heat from being transferred from the inner tube 3 to the outer tube 4, thereby helping to reduce the heat leakage of the liquid hydrogen cylinder 100.

[0067] The third and fourth insulating members 1212, 1213 are arranged radially from the inside outward of the inner tube 3. The third insulating member 1212 is located inside the fourth insulating member 1213. This means that when heat is transferred from the inside out of the inner tube 3, it must pass through the third and fourth insulating members 1212, 1213, respectively. This increases the difficulty of heat transfer. Furthermore, the thickness of the third insulating member 1212 is smaller than that of the fourth insulating member 1213, allowing the third insulating member 1212 to not only provide insulation but also provide a certain buffering effect. The third and fourth insulating members 1212, 1213 are made of different materials to provide different structural properties. For example, the third insulating member 1212 is a double-layer structure, with one layer being aluminum foil and the other being fiberglass paper, while the fourth insulating member 1213 is made of fiberglass wool.

[0068] The present invention also provides a hydrogen fuel cell system.

[0069] According to an embodiment of the present invention, a hydrogen fuel cell system is provided with a liquid hydrogen cylinder 100 according to any of the above-mentioned embodiments. By arranging a first support structure 11 and a second support structure 12 for radial support between the inner cylinder 3 and the outer cylinder 4, the inner cylinder 3 can be stably supported in the outer cylinder 4. This support method is conducive to reducing the heat leakage of the liquid hydrogen cylinder 100 and ensuring the thermal insulation performance of the cylinder.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0072] In the description of the present invention, "plurality" means two or more.

[0073] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0074] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0075] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A liquid hydrogen cylinder (100), characterized in that: include: an inner cylinder (3) and an outer cylinder (4), wherein the inner cylinder (3) is installed in the outer cylinder (4) and is spaced apart from the outer cylinder (4) in the radial direction; A heat-insulating support assembly (1), wherein the heat-insulating support assembly (1) is supported radially between the inner cylinder (3) and the outer cylinder (4), and the heat-insulating support assembly (1) comprises a first support structure (11) and a second support structure (12) arranged in an axial direction of the inner cylinder (3) and spaced apart from each other; The outer end of the first supporting structure (11) is fixedly connected to the outer cylinder (4) and the inner end is slidably matched with the inner cylinder (3); the outer end and the inner end of the second supporting structure (12) are respectively fixedly connected to the outer cylinder (4) and the inner cylinder (3); The first supporting structure (11) comprises: a first thermal insulation pipe member (111); a first sleeve assembly (112), the first sleeve assembly (112) being sleeved on the inner end of the first thermal insulation pipe (111), the first sleeve assembly (112) being in sliding engagement with the inner tube (3); a second sleeve assembly (113), the second sleeve assembly (113) being sleeved on the outer end of the first thermal insulation pipe (111), and the second sleeve assembly (113) being fixedly connected to the outer cylinder (4); The first sleeve assembly (112) comprises a first sleeve (1121), a first pad (1122) and a sliding pad (1123), wherein the first pad (1122) and the sliding pad (1123) are stacked and connected, and the first sleeve (1121) is arranged on a side of the first pad (1122) facing away from the sliding pad (1123); The first sleeve (1121) is sleeved on the inner end of the first heat-insulating pipe (111), and the sliding pad (1123) is slidably matched with the outer peripheral wall of the inner cylinder (3); The second sleeve assembly (113) comprises a second sleeve (1131) and a second pad (1132), wherein the second sleeve (1131) and the second pad (1132) are connected to one side of the inner cylinder (3); The outer cylinder (4) is provided with a first mounting hole (41), the second pad (1132) is fixedly attached to the outer peripheral wall of the outer cylinder (4), and the second sleeve (1131) passes through the first mounting hole (41) and extends into the outer cylinder (4) to be connected to the first thermal insulation pipe (111); The first heat-insulating pipe (111) comprises a first heat-insulating pipe (1111) and a first heat-insulating member (1112) and a second heat-insulating member (1113) installed in the first heat-insulating pipe (1111); both ends of the first heat-insulating pipe (1111) are respectively sleeved and matched with the first sleeve assembly (112) and the second sleeve assembly (113); The first heat insulating member (1112) and the second heat insulating member (1113) are sequentially distributed from the inside to the outside along the radial direction of the inner cylinder (3), and the thickness of the first heat insulating member (1112) is smaller than the thickness of the second heat insulating member (1113); The second supporting structure (12) comprises: A second thermal insulation pipe (121); a third sleeve assembly (122), the third sleeve assembly (122) being sleeved on the inner end of the second thermal insulation pipe (121), the third sleeve assembly (122) being fixedly connected to the inner cylinder (3); A fourth sleeve assembly (123), the fourth sleeve assembly (123) is sleeved on the outer end of the second thermal insulation pipe (121), and the fourth sleeve assembly (123) is fixedly connected to the outer cylinder (4).

2. The liquid hydrogen cylinder (100) according to claim 1, characterized in that The third sleeve assembly (122) comprises a third sleeve (1221) and a third pad (1222), wherein the third sleeve (1221) is arranged on a side of the third pad (1222) away from the inner cylinder (3); The third sleeve (1221) is sleeved on the inner end of the second heat-insulating pipe (121), and the third pad (1222) is fixedly connected to the outer peripheral wall of the inner cylinder (3).

3. The liquid hydrogen cylinder (100) according to claim 1, characterized in that: The fourth sleeve assembly (123) comprises a fourth sleeve (1231) and a fourth pad (1232), wherein the fourth sleeve (1231) is connected to the fourth pad (1232) on a side facing the inner cylinder (3); The outer cylinder (4) is provided with a second mounting hole (42), the fourth pad (1232) is fixedly attached to the outer peripheral wall of the outer cylinder (4), and the fourth sleeve (1231) passes through the second mounting hole (42) to extend into the outer cylinder (4) and is connected to the second thermal insulation pipe (121).

4. The liquid hydrogen cylinder (100) according to claim 1, characterized in that The second thermal insulation pipe (121) comprises a second thermal insulation pipe (1211) and a third thermal insulation component (1212) and a fourth thermal insulation component (1213) installed in the second thermal insulation pipe (1211); both ends of the second thermal insulation pipe (1211) are respectively sleeved and matched with the third sleeve assembly (122) and the fourth sleeve assembly (123); The third heat insulating member (1212) and the fourth heat insulating member (1213) are sequentially distributed from inside to outside along the radial direction of the inner cylinder (3), and the thickness of the third heat insulating member (1212) is smaller than the thickness of the fourth heat insulating member (1213).

5. A hydrogen fuel cell system, characterized in that: A liquid hydrogen cylinder (100) according to any one of claims 1 to 4 is provided.

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