Vacuum hose suitable for conveying liquid hydrogen

Abstract

The utility model relates to the technical field of liquid hydrogen conveying, and particularly discloses a vacuum hose suitable for liquid hydrogen conveying, which comprises an inner pipe assembly and an outer pipe assembly sleeved on the outer side of the inner pipe assembly and coaxially arranged with the inner pipe assembly, the inner pipe assembly comprises two sets of inner pipes, a metal corrugated pipe located between the two sets of inner pipes, an inner pairing connector used for connecting the metal corrugated pipe and the inner pipes, a first inner steel wire mesh sleeve arranged on the outer side of the metal corrugated pipe and the inner pairing connector in a sleeving mode, and a first inner pressing ring arranged on the outer side of the first inner steel wire mesh sleeve in a sleeving mode and corresponding to the inner pairing connector. The inner pipe, the metal corrugated pipe, the inner pairing connector, the first inner steel wire mesh sleeve and the first inner pressing ring are coaxially arranged. Through cooperation of the first steel wire mesh sleeve, the inner pairing connector and the first inner pressing ring, the risk of liquid leakage is effectively prevented, and meanwhile, compared with the prior art, the assembling efficiency is greatly improved; and the assembly difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid hydrogen transportation technology, and more specifically, to a vacuum hose suitable for liquid hydrogen transportation. Background Technology

[0002] As a new energy source for sustainable development, the production, storage and transportation of liquid hydrogen require extremely low temperature and high pressure conditions. Currently, the transportation of liquid hydrogen mainly relies on vehicles and pipelines. Vehicles are suitable for medium and long distances, while pipelines are suitable for short distances.

[0003] During the transportation of liquid hydrogen by vehicle, the filling and unloading of liquid hydrogen are unavoidable. Since vehicles transporting liquid hydrogen cannot be parked in the same location each time, this poses a major challenge for using fixed pipe connections. Pipe connections that can move within a certain range are needed to ensure the filling and unloading of liquid hydrogen.

[0004] When transporting and installing liquid hydrogen pipelines over short distances, there may be instances where the positions of some equipment pipe openings are uncertain or offset from their original locations. If rigid pipes are used for connection, it can easily increase the difficulty of installation, or even make the pipeline impossible to install.

[0005] While currently available flexible hoses can solve most of the aforementioned flexibility issues, they suffer from frost and ice buildup on their surface during operation, resulting in significant heat loss and hindering installation and removal. During assembly, the wire mesh sleeve is passed through the mating connector and fixed to the outside of the inner tube connected to the other end of the mating connector. This method greatly increases assembly difficulty and introduces higher uncertainty and risk during installation. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a vacuum hose suitable for liquid hydrogen transportation;

[0007] The solution adopted by this utility model to solve the technical problem is:

[0008] A vacuum hose suitable for liquid hydrogen transportation includes an inner tube assembly and an outer tube assembly that is fitted outside the inner tube assembly and coaxially arranged with the inner tube assembly, wherein a vacuum cavity is formed between the inner tube assembly and the outer tube assembly.

[0009] The inner tube assembly includes two sets of inner tubes, a metal bellows located between the two sets of inner tubes, an inner mating joint for connecting the metal bellows and the inner tubes, an inner wire mesh sleeve fitted on the outside of the metal bellows and the inner mating joint, and an inner pressure ring fitted on the outside of the inner wire mesh sleeve and corresponding to the inner mating joint.

[0010] The inner tube, metal corrugated pipe, inner mating joint, inner wire mesh sleeve, and inner pressure ring are coaxially arranged.

[0011] In some possible implementations, an annular groove is provided on the outer side of the inner mating connector;

[0012] The wire mesh sleeve includes a snap-fit ​​section installed in the groove and a protective section connected to the snap-fit ​​section and fitted onto the outside of the metal bellows; the inner pressure ring is fitted onto the outside of the snap-fit ​​section.

[0013] In some possible implementations, the inner pressure ring comprises two sets of symmetrically arranged and interconnected semi-circular arc structures forming a ring.

[0014] In some possible implementations, an inner wire mesh sleeve two is also fitted outside the inner wire mesh sleeve one and the metal corrugated pipe; an inner pressure ring two is fitted outside the inner wire mesh sleeve two; the inner pressure ring two is fitted between the inner pressure ring one and the inner pipe and is fitted outside the inner mating joint.

[0015] In some possible implementations, an annular slot coaxial with the inner mating joint is provided at the end of the inner mating joint away from the metal bellows, and one end of the inner tube is inserted into the slot.

[0016] In some possible implementations, multiple sets of supports are fitted on the outside of the inner wire mesh sleeve one or the inner wire mesh sleeve two and along its axial direction.

[0017] In some possible implementations, the support includes at least two sets of identical arc-shaped support members that form a ring.

[0018] In some possible implementations, the outer tube assembly includes two sets of outer tubes respectively fitted outside the inner tube and corresponding to the inner tube, a flexible tube connected to the two sets of outer tubes respectively and fitted outside the inner wire mesh sleeve one or inner wire mesh sleeve two, an outer wire mesh sleeve fitted inside the flexible tube and connected to the outer tube, and an outer pressure ring fitted outside the outer wire mesh sleeve and outside the outer tube.

[0019] In some possible implementations, a mounting flange is provided at the end of the outer tube away from the hose; the mounting flange is fitted onto the outside of the inner tube; a heat-conducting component is also provided between the inner tube and the outer tube, the heat-conducting component is coaxially fitted onto the outside of the inner tube and connected to the mounting flange; an annular mating part is provided between the heat-conducting component and the inner tube; the annular mating part is an annular boss or an annular groove that is inserted into the annular boss.

[0020] In some possible implementations, a vacuum valve is provided on one set of the hoses.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This invention effectively prevents the risk of liquid leakage by using a combination of a metal corrugated hose, a steel wire mesh sleeve, an inner mating connector, and an inner pressure ring. At the same time, it greatly speeds up the assembly efficiency compared to existing technologies.

[0023] This invention, through the design of the arc-shaped support member, enables the outer tube assembly and the inner tube assembly to maintain concentricity while exhibiting superior flexibility and more adaptable cooperation.

[0024] This invention effectively reduces cold loss through the combination of mounting flange, heat-conducting components, and annular connecting parts; it is also more convenient and operable in terms of installation and disassembly; and its versatility is also guaranteed. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0026] Figure 2 This is an axonometric view of the present invention;

[0027] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 1 Enlarged view of point B in the middle;

[0029] Figure 5 This is a schematic diagram of the internal mating connector in this utility model;

[0030] Figure 6 This is a schematic diagram of the support in this utility model;

[0031] Figure 7 for Figure 1 Enlarged view of point C in the middle;

[0032] The components include: 1. Inner tube assembly; 11. Inner tube; 12. Corrugated metal pipe; 13. Inner mating joint; 131. Groove; 132. Slot; 14. Inner wire mesh sleeve one; 15. Inner pressure ring one; 16. Inner wire mesh sleeve two; 17. Inner pressure ring two; 18. Support; 181. Arc-shaped support; 2. Outer tube assembly; 21. Outer tube; 22. Hose; 23. Outer wire mesh sleeve; 24. Outer pressure ring; 3. Mounting flange; 4. Heat-conducting assembly; 5. Annular mating part; 6. Vacuum valve. Detailed Implementation

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The present invention will now be described in detail.

[0035] like Figures 1-7 As shown:

[0036] A vacuum hose suitable for liquid hydrogen transportation includes an inner tube assembly 1 and an outer tube assembly 2, which is fitted outside the inner tube assembly 1 and coaxially arranged with the inner tube assembly 1, wherein a vacuum cavity is formed between the inner tube assembly 1 and the outer tube assembly 2.

[0037] The inner tube assembly 1 includes two sets of inner tubes 11, a metal corrugated pipe 12 located between the two sets of inner tubes 11, an inner mating joint 13 for connecting the metal corrugated pipe 12 and the inner tubes 11, an inner wire mesh sleeve 14 fitted on the outside of the metal corrugated pipe 12 and the inner mating joint 13, and an inner pressure ring 15 fitted on the outside of the inner wire mesh sleeve 14 and corresponding to the inner mating joint 13.

[0038] The inner tube 11, the metal corrugated pipe 12, the inner mating joint 13, the inner wire mesh sleeve 14, and the inner pressure ring 15 are coaxially arranged.

[0039] Compared with the prior art, the inner wire mesh sleeve 14 is no longer connected and fixed to the inner tube 11, but is connected and fixed to the mating joint. This avoids the situation where the inner wire mesh sleeve 14 will pass through the mating joint during assembly. Since the outer diameter of the mating joint is large, the wire mesh sleeve 14 and the mating joint will generate a large friction force when the wire mesh sleeve 1 is moved during assembly, which will increase the difficulty of assembly.

[0040] In some possible implementations, an annular groove 131 is provided on the outer side of the inner mating connector 13;

[0041] The wire mesh sleeve includes a snap-fit ​​section installed in the groove 131 and a protective section connected to the snap-fit ​​section and fitted onto the outside of the metal bellows 12; the inner pressure ring 15 is fitted onto the outside of the snap-fit ​​section; the snap-fit ​​section and the protective section are integrally formed.

[0042] During assembly, compared with the prior art, this utility model does not require one end of the inner wire mesh sleeve 14 to pass through the entire mating joint to achieve the connection with the inner tube 11; it avoids the situation where the outer diameter of the inner mating joint 13 is larger than the outer diameter of the inner tube 11, and the inner wire mesh sleeve 14 passes through the inner mating joint 13 due to friction, which causes greater assembly difficulty. This setting will greatly reduce the difficulty of assembly.

[0043] With this configuration, the groove 131 is provided with a matching connector on the side near the metal bellows 12. The snap-fit ​​section can be simply fitted onto the outside of the groove 131, which greatly reduces the assembly difficulty. The groove 131 has a U-shaped structure. After the snap-fit ​​section and the matching connector are installed, the inner wire mesh sleeve 14 is fitted onto the outside of the snap-fit ​​section, so that the inner side of the snap-fit ​​section contacts and abuts against the bottom of the groove 131. The three parts are then welded together.

[0044] In some possible implementations, the inner pressure ring 15 includes two sets of symmetrically arranged and interconnected semi-circular arc structures forming a ring. In this way, after the snap-fit ​​section is installed, the two sets of semi-circular arc structures are fitted onto the outside of the snap-fit ​​section, and then the semi-circular arc structures are welded together to form a whole, which can achieve the fixation of the snap-fit ​​section and the mating joint. Compared with the prior art, it is not necessary to fit a whole ring-shaped pressure ring onto the outside of the inner wire mesh sleeve 14 when assembling the wire mesh sleeve 1 and the inner tube 11.

[0045] In some possible implementations, to further strengthen the connection between the mating joint and the metal bellows 12, an inner wire mesh sleeve 2 16 is also fitted on the outside of the inner wire mesh sleeve 14 and the metal bellows 12; an inner pressure ring 2 17 is fitted on the outside of the inner wire mesh sleeve 2 16; the inner pressure ring 2 17 is fitted between the inner pressure ring 15 and the inner tube 11 and on the outside of the inner mating joint 13; the inner wire mesh sleeve 2 16 is provided according to the usage requirements and may or may not be installed.

[0046] In some possible implementations, an annular slot 132 coaxial with the inner mating connector 13 is provided at the end of the inner mating connector 13 away from the metal bellows 12, and one end of the inner tube 11 is inserted into the slot 132; the slot 132 communicates with the cylindrical cavity in the inner mating connector 13, and after the two are assembled, the inner side of the inner tube 11 is coplanar with the inner side of the inner mating connector 13.

[0047] In some possible implementations, multiple sets of supports 18 are fitted on the outer side of the inner wire mesh sleeve 14 or the inner wire mesh sleeve 16 along its axial direction. The support 18 will effectively ensure the concentricity of the metal bellows.

[0048] In some possible implementations, the support 18 includes at least two sets of arc-shaped support members 181 with identical structures forming a ring. Compared with the ring-shaped integral support 18 in the prior art, the support 18 in this invention will be an arc-shaped support member 181. A gap is formed between the two sets of arc-shaped support members 181 in the same support 18. When the metal bellows is bent, the arc-shaped support 18 can more flexibly ensure the concentricity during bending. Compared with the ring-shaped integral support 18 in the prior art, the contact area when the outer tube comes into contact will be greatly reduced, thus reducing heat loss.

[0049] Specifically, each set of supports 18 consists of two sets of arc-shaped support members 181 arranged symmetrically, and the four sets of arc-shaped support members 181 in two adjacent sets of supports 18 are arranged in a cross pattern.

[0050] In some possible implementations, in order to allow the outer tube assembly 2 to adapt to bending and form a vacuum cavity with the inner tube assembly 1, the outer tube assembly 2 includes two sets of outer tubes 21 respectively fitted outside the inner tube 11 and corresponding to the inner tube 11, a flexible tube 22 connected to the two sets of outer tubes 21 respectively and fitted outside the inner wire mesh sleeve 14 or the inner wire mesh sleeve 26, an outer wire mesh sleeve 23 fitted inside the flexible tube 22 and connected to the outer tube 21, and an outer pressure ring 24 fitted outside the outer wire mesh sleeve 23 and outside the outer tube 21; the flexible tube 22 is also a metal corrugated pipe.

[0051] Furthermore, an external mating head is provided between the outer tube 21 and the hose for the fitting of the outer wire mesh sleeve.

[0052] In some possible implementations, to effectively connect the two sets of vacuum hoses, a mounting flange 3 is provided at the end of the outer tube 21 away from the hose 22; the mounting flange 3 is fitted onto the outside of the inner tube 11; a heat-conducting component 4 is also provided between the inner tube 11 and the outer tube 21 to increase the heat insulation of the heat conduction path at both ends of the present invention, the heat-conducting component 4 is coaxially fitted onto the outside of the inner tube 11 and connected to the mounting flange 3; an annular connecting piece 5 is provided between the heat-conducting component 4 and the inner tube 11; the annular connecting piece 5 is an annular boss or an annular groove that is inserted into the annular boss.

[0053] In a set of vacuum hoses, when the annular connecting piece 5 on the outer side of one set of outer tubes 21 is provided with an annular boss, the annular connecting piece 5 corresponding to the other set of outer tubes 21 is provided with an annular groove 131.

[0054] The heat-conducting component 4 includes an inner pipe fitted outside the inner pipe 11 and an outer pipe fitted outside the inner pipe and located between the inner pipe and the outer pipe 21. The outer pipe and the inner pipe are connected to each other at the ends away from the mounting flange 3. An annular mating part 5 is disposed between the inner pipe and the inner pipe 11. The mounting flange 3 is fitted outside the outer pipe and connected to the end of the outer pipe 21 away from the hose 22. The mounting flange 3, the heat-conducting component 4, and the annular mating part 5 will form a flat vacuum flange. When the two sets of vacuum hoses are connected, a sealing gasket is placed between the two sets of connected mounting flanges 3, and a sealed connection is achieved by the cooperation of the annular boss and the annular groove.

[0055] In some possible implementations, a vacuum valve 6 is provided on one of the sets of hoses 22; the vacuum valve 6 is provided to form a vacuum cavity between the outer tube 21 and the inner tube 11.

[0056] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A vacuum hose suitable for use in the transfer of liquid hydrogen, characterized in that, Includes an inner tube assembly and an outer tube assembly that is fitted onto the outside of the inner tube assembly and coaxially arranged with the inner tube assembly; The inner tube assembly includes two sets of inner tubes, a metal bellows located between the two sets of inner tubes, an inner mating joint for connecting the metal bellows and the inner tubes, an inner wire mesh sleeve fitted on the outside of the metal bellows and the inner mating joint, and an inner pressure ring fitted on the outside of the inner wire mesh sleeve and corresponding to the inner mating joint. The inner tube, metal corrugated pipe, inner mating joint, inner wire mesh sleeve, and inner pressure ring are coaxially arranged.

2. A vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 1, wherein, A circular groove is provided on the outer side of the inner mating joint; The wire mesh sleeve includes a snap-fit ​​section installed in the groove and a protective section connected to the snap-fit ​​section and fitted onto the outside of the metal bellows; the inner pressure ring is fitted onto the outside of the snap-fit ​​section.

3. The vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 1, wherein, The inner pressure ring includes two sets of symmetrically arranged and interconnected semi-circular arc structures that form a ring.

4. The vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 1, wherein, An inner wire mesh sleeve 2 is also fitted on the outside of the inner wire mesh sleeve 1 and the metal corrugated pipe; an inner pressure ring 2 is fitted on the outside of the inner wire mesh sleeve 2; the inner pressure ring 2 is fitted between the inner pressure ring 1 and the inner pipe and on the outside of the inner mating joint.

5. The vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 1, wherein, A circular slot, coaxial with the inner mating joint, is provided at the end of the inner mating joint away from the metal bellows, and one end of the inner tube is inserted into the slot.

6. A vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 4, wherein, Multiple sets of supports are fitted on the outside of the inner wire mesh sleeve one or the inner wire mesh sleeve two and along its axial direction.

7. A vacuum hose suitable for liquid hydrogen transportation according to claim 6, characterized in that, The support includes at least two sets of identical arc-shaped support members that form a ring.

8. The vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 4, wherein, The outer tube assembly includes two sets of outer tubes respectively fitted outside the inner tube and corresponding to the inner tube, a flexible tube connected to the two sets of outer tubes respectively and fitted outside the inner wire mesh sleeve one or inner wire mesh sleeve two, an outer wire mesh sleeve fitted inside the flexible tube and connected to the outer tube, and an outer pressure ring fitted outside the outer wire mesh sleeve and outside the outer tube.

9. A vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 8, wherein, Each set of outer tubes is provided with a mounting flange at the end away from the hose; the mounting flange is fitted on the outside of the inner tube; a heat-conducting component is also provided between the inner tube and the outer tube, the heat-conducting component is coaxially fitted on the outside of the inner tube and connected to the mounting flange; an annular mating part is provided between the heat-conducting component and the inner tube; the annular mating part is an annular boss or an annular groove that is inserted into the annular boss.

10. The vacuum hose suitable for use in the delivery of liquid hydrogen according to claim 8, wherein, A vacuum valve is provided on one of the sets of hoses.

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