High compliance vacuum metal hose

Abstract

The utility model provides a kind of high compliance vacuum metal hose, the purpose is to solve the technical problem of the compliance of traditional vacuum hose being poor. The vacuum metal hose includes: inner tube;Anti-skid layer, wrapped in the outside of the inner tube;Heat-insulating layer, wrapped in the outside of the anti-skid layer;Insulating layer, wrapped in the outside of the heat-insulating layer;Outer tube, set in the outside of insulating layer;Wherein, the gap between the outer tube and the insulating layer exists, the space of this gap is vacuum environment. By setting anti-skid layer, heat-insulating layer, insulating layer successively in the outside of inner tube, and setting outer tube in the outermost layer. Among them, the anti-skid layer is isolated inner tube and heat-insulating layer, the insulating layer is isolated outer tube and heat-insulating layer, to avoid in the process of bending, the surface of inner tube and the surface of outer tube and heat-insulating layer appear relative sliding, leading to heat-insulating layer breakage. While it can reduce the diameter of outer tube under the same inner tube specification, so as to ensure the heat insulation effect of the vacuum metal hose while improving compliance.

Description

Technical Field

[0001] This utility model relates to a tube, specifically a highly flexible vacuum metal hose. Background Technology

[0002] Vacuum metal hoses are flexible pipes designed for transporting cryogenic media. They are mainly used in areas where it is difficult to quickly connect equipment or where it is difficult to manufacture rigid vacuum tubes for transporting cryogenic media.

[0003] Traditional vacuum hoses have poor flexibility (pipe bending radius). Taking a DN50 hose as an example, the outer tube diameter can be as low as DN125. The static bending radius of this hose is 0.75 meters and the dynamic bending radius is 1.5 meters, which greatly limits its application scenarios. Utility Model Content

[0004] To address the technical problem of poor flexibility in traditional vacuum hoses, this invention provides a high-flexibility vacuum metal hose. By sequentially setting an anti-slip layer, a heat insulation layer, and an isolation layer on the outside of the inner tube, and setting an outer tube on the outermost layer, the flexibility of the vacuum metal hose is improved while ensuring its heat insulation effect.

[0005] The technical solution of this utility model is: A highly flexible vacuum metal hose, comprising: Inner tube; An anti-slip layer is wrapped around the outside of the inner tube; An insulation layer is wrapped around the outside of the anti-slip layer; An insulating layer is wrapped around the outside of the insulation layer; The outer tube is fitted over the outside of the isolation layer; There is a gap between the outer tube and the isolation layer, and the space of this gap is a vacuum environment.

[0006] Optionally, plugs are provided at both ends of the outer tube and the inner tube.

[0007] Optionally, the outer surface of the isolation layer is provided with a plurality of support rings at equal intervals, and there is a gap between the outer surface of the support rings and the inner surface of the outer tube.

[0008] Optionally, the thickness of the support ring is 4-7 mm.

[0009] Optionally, both the anti-slip layer and the isolation layer comprise multiple layers of overlapping fiberglass cloth.

[0010] Optionally, the fiberglass cloth in both the anti-slip layer and the isolation layer has a spiral wound structure.

[0011] Optionally, the spiral directions of two adjacent layers of fiberglass cloth in the anti-slip layer are opposite.

[0012] Optionally, the spiral directions of two adjacent layers of fiberglass cloth in the isolation layer are opposite.

[0013] Optionally, the insulation layer comprises a single overlapping aluminum foil and insulation paper.

[0014] Optionally, the thickness of the anti-slip layer and the thickness of the insulating layer are both less than the thickness of the heat insulation layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are: By sequentially setting an anti-slip layer, an insulation layer, and an isolation layer on the outside of the inner tube, and then setting an outer tube as the outermost layer, the anti-slip layer isolates the inner tube from the insulation layer, and the isolation layer isolates the outer tube from the insulation layer. This prevents relative sliding between the surfaces of the inner and outer tubes and the insulation layer during bending, thus avoiding damage to the insulation layer.

[0016] In this technical solution, by setting an isolation layer and an anti-slip layer to isolate the insulation layer, the diameter of the outer tube can be reduced for the same inner tube specifications, thereby improving the flexibility while ensuring the heat insulation effect of the vacuum metal hose. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0020] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0021] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example

[0022] See Figure 1 This embodiment discloses a high-flexibility vacuum metal hose, including an inner tube 10 and an outer tube 20. An anti-slip layer 30, a heat insulation layer 40, and an isolation layer 50 are provided between the inner tube 10 and the outer tube 20. The anti-slip layer 30 is wrapped around the inner tube 10, the heat insulation layer 40 is wrapped around the anti-slip layer 30, the isolation layer 50 is wrapped around the outside of the heat insulation layer 40, and the outer tube 20 is sleeved on the outside of the isolation layer 50. There is a gap between the outer tube 20 and the isolation layer 50.

[0023] Plugs are provided at both ends of the inner tube 10 and the outer tube 20. The space between the inner tube 10 and the outer tube 20 is sealed by the plugs, and the sealed space is evacuated by a vacuum pump.

[0024] Preferably, the outer side of the isolation layer 50 is provided with a plurality of support rings 60, the outer diameter of the support rings 60 being smaller than the inner diameter of the outer tube 20, wherein all the support rings 60 are distributed at equal intervals on the outer side of the isolation layer 50.

[0025] By setting a support ring 60 outside the isolation layer 50, when the metal hose makes a small-radius bending motion, the support ring 60 can contact the inner wall of the outer tube 20, avoiding contact between the inner wall of the outer tube 20 and the isolation layer 50, thereby avoiding relative friction between the inner wall of the outer tube 20 and the isolation layer 50, and preventing damage to the isolation layer 50.

[0026] In one specific embodiment: The preparation method of this highly flexible vacuum metal hose includes the following steps: S10. Prepare the inner tube 10. The preparation of the inner tube 10 includes welding, flaw detection, helium testing, and cleaning. Welding involves welding multiple inner tubes 10 to a specified length as needed. Flaw detection involves inspecting the inner and outer walls of the inner tube 10 to ensure they are intact. Helium testing uses helium gas to check the airtightness of the inner tube 10, ensuring it meets the required standards. Cleaning involves cleaning the inner and outer surfaces of the inner tube 10 to ensure they are free of contaminants.

[0027] S20. Wrap an anti-slip layer 30 around the outer wall of the inner tube 10. The anti-slip layer 30 is made of alkali-free fiberglass cloth. Specifically, strips of alkali-free fiberglass cloth are spirally wound around the outer wall of the inner tube 10, usually in 3-8 layers. It should be noted that during the winding process, each layer of alkali-free fiberglass cloth needs to completely cover the outer wall of the inner tube 10.

[0028] In addition, during the winding process, adjacent layers of alkali-free glass fiber cloth need to be wound on the inner tube 10 in opposite spiral directions.

[0029] S30. An insulation layer 40 is wrapped around the outside of the anti-slip layer 30. The insulation layer 40 is made of a composite material of aluminum foil and insulation paper, wherein the composite material is composed of one layer of aluminum foil and one layer of insulation paper, and the insulation paper is glass fiber paper. This composite material is also a strip structure and is wound around the outside of the anti-slip layer 30 in a spiral manner, usually 25-35 layers. The spiral directions of adjacent composite material layers are also opposite, and during the winding process, it is necessary to ensure that each layer of composite material completely covers the anti-slip layer 30.

[0030] S40. An insulating layer 50 is wrapped around the outside of the insulation layer 40. The insulating layer 50 is also made of alkali-free glass fiber cloth in a spiral winding manner, and the number of winding layers of the insulating layer 50 is 3-8 layers.

[0031] In addition, step S40 also includes step S41, which mainly involves setting multiple support rings 60 on the outside of the isolation layer 50, with each support ring 60 being equally spaced, and the thickness of the support ring 60 being controlled within the range of 4-7mm.

[0032] In step S41, the support ring 60 is also made of alkali-free glass fiber cloth. During the process of making the support ring 60, alkali-free glass fiber cloth is wrapped around the same position outside the isolation layer 50 multiple times to achieve the required thickness, thereby forming the support ring 60.

[0033] In addition, the thickness of the support ring 60 refers to the minimum distance between the outer surface of the support ring 60 and the outer surface of the isolation layer 50.

[0034] S50, Composite outer tube 20: The inner tube 10, which is wrapped with an anti-slip layer 30, a heat insulation layer 40 and an isolation layer 50, is inserted into the outer tube 20, and plugs are used to seal both ends of the inner tube 10 and the outer tube 20. That is, the inner tube 10 after completing step S41 is inserted into the outer tube 20, and two plugs are used to connect the two ends of the inner tube 10 and the outer tube 20 respectively, so that the inner tube 10 and the outer tube 20 are coaxial in a straight line state, and the space between the inner tube 10 and the outer tube 20 is sealed by the two plugs.

[0035] S60. Vacuum treatment is performed on the space between the inner tube 10 and the outer tube 20.

[0036] There are three ways heat is lost: radiation, conduction, and convection.

[0037] In this technical solution, the purpose of setting the aluminum foil is to prevent radiative heat transfer.

[0038] The purpose of setting up the insulation paper is to prevent heat conduction. Its main principle is that after the insulation paper overlaps with the aluminum foil, there is insulation paper between adjacent layers of aluminum foil, so that the heat on the aluminum foil can only be conducted in its length direction and cannot be conducted between the layers of aluminum foil. Since the aluminum foil is wrapped with 25-35 layers, the heat conduction path is very long, so that the heat cannot be conducted to the outside of the insulation layer 40.

[0039] The space between the inner tube 10 and the outer tube 20 is evacuated to ensure that there is no air inside. As a result, no airflow will occur in the space between the inner tube 10 and the outer tube 20 during the entire bending process of the metal hose, thereby avoiding convective heat transfer.

[0040] An anti-slip layer 30, a heat insulation layer 40, and an isolation layer 50 are sequentially arranged on the outside of the inner tube 10, with an outer tube 20 as the outermost layer. The anti-slip layer 30 isolates the inner tube 10 from the heat insulation layer 40, and the isolation layer 50 isolates the outer tube 20 from the heat insulation layer 40. This prevents relative sliding between the surfaces of the inner tube 10 and the outer tube 20 and the heat insulation layer 40 during bending, thus avoiding damage to the heat insulation layer 40.

[0041] In this technical solution, by setting an isolation layer 50 and an anti-slip layer 30 to isolate the insulation layer 40, the diameter of the outer tube 20 under the same inner tube 10 specification can be reduced, thereby improving the flexibility while ensuring the heat insulation effect of the vacuum metal hose.

[0042] In another specific embodiment: The inner tube 10 has an outer diameter of 50mm. The thickness of the alkali-free fiberglass cloth is about 0.01mm, the thickness of the aluminum foil is about 0.007mm, and the thickness of the insulation paper is about 0.06mm. During the production process, 3-8 layers of alkali-free fiberglass cloth are first wound around the 50mm outer diameter. Calculated at the maximum thickness, the thickness of the anti-slip layer 30 of 8 layers of alkali-free fiberglass cloth is about 0.08mm. The insulation layer 40 is also calculated at the maximum thickness of 35 layers, which is about 2.345mm. The maximum thickness of the isolation layer 50 is about 0.08mm (8 layers). The maximum thickness of the support ring 60 is 7mm.

[0043] Based on this calculation, after the anti-slip layer 30, heat insulation layer 40, isolation layer 50 and support ring 60 are installed on the inner tube 10, the diameter of the entire inner tube 10 expands to nearly 70mm. In addition, a certain space needs to be reserved between the outer surface of the support ring 60 and the inner wall of the outer tube 20. Calculated at 3mm on one side, the outer diameter of the outer tube 20 can be made of pipe material with a diameter of 80mm.

[0044] Compared to existing technologies, the diameter of the outer tube 20 using this technical solution can be reduced by at least two sizes (from at least 125mm to 80mm, including 100mm of tubing). Due to the reduced diameter of the outer tube 20, the static bending radius of the entire flexible metal hose can reach below 480mm, a 36% increase compared to the 750mm of existing technologies. The dynamic bending radius can reach 1000mm, a 33% increase compared to the 1500mm of existing technologies.

[0045] At the same time, by adopting this technical solution, the diameter of the outer tube 20 is reduced by two levels, and the cost of manufacturing the metal hose is also reduced significantly.

[0046] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A highly flexible vacuum metal hose, characterized in that, include: Inner tube; An anti-slip layer is wrapped around the outside of the inner tube; An insulation layer is wrapped around the outside of the anti-slip layer; An insulating layer is wrapped around the outside of the insulation layer; The outer tube is fitted over the outside of the isolation layer; There is a gap between the outer tube and the isolation layer, and the space of this gap is a vacuum environment.

2. The high-flexibility vacuum metal hose according to claim 1, characterized in that, Both ends of the outer tube and the inner tube are provided with plugs.

3. The high-flexibility vacuum metal hose according to claim 1, characterized in that, The outer surface of the isolation layer is provided with multiple support rings at equal intervals, and there is a gap between the outer surface of the support rings and the inner surface of the outer tube.

4. The high-flexibility vacuum metal hose according to claim 3, characterized in that, The thickness of the support ring is 4-7 mm.

5. The high-flexibility vacuum metal hose according to claim 1, characterized in that, Both the anti-slip layer and the isolation layer consist of multiple overlapping layers of fiberglass cloth.

6. The high-flexibility vacuum metal hose according to claim 5, characterized in that, Both the anti-slip layer and the isolation layer contain glass fiber cloth with a spiral winding structure.

7. The high-flexibility vacuum metal hose according to claim 6, characterized in that, The spiral directions of two adjacent layers of fiberglass cloth in the anti-slip layer are opposite.

8. The high-flexibility vacuum metal hose according to claim 7, characterized in that, The spiral directions of two adjacent layers of fiberglass cloth in the isolation layer are opposite.

9. The high-flexibility vacuum metal hose according to claim 1, characterized in that, The insulation layer comprises a single, overlapping aluminum foil and insulation paper.

10. The high-flexibility vacuum metal hose according to claim 9, characterized in that, The thickness of the anti-slip layer and the thickness of the isolation layer are both less than the thickness of the heat insulation layer.

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