KR20240071914A - Support Device for Vacuum Insulation Pipe - Google Patents

Abstract

The present invention relates to a support for vacuum insulated pipe disposed between the inner pipe and the exterior of a vacuum insulated pipe that transports cryogenic fluid such as liquefied natural gas while preventing heat loss, and to a vacuum insulated pipe having the same, and to a vacuum insulated pipe according to the present invention. The support for piping includes an inner tube through which a cryogenic fluid flows, an outer tube installed at a predetermined distance apart from the outer tube, and a vacuum layer formed between the inner tube and the outer tube. A support body formed to extend along the circumferential direction within the layer; a plurality of inner supports arranged at predetermined intervals along the circumferential direction of the support body and protruding inward in the radial direction and in close contact with the outer peripheral surface of the inner tube; And, a plurality of outer supports arranged between the inner supports on the support body and protruding outward in the radial direction and in close contact with the inner peripheral surface of the exterior.

Description

Support for vacuum insulated piping and vacuum insulated piping having the same {Support Device for Vacuum Insulation Pipe}

The present invention relates to vacuum insulated piping, and more specifically, to a vacuum insulated pipe support disposed between the inner pipe and the exterior of a vacuum insulated pipe that transports cryogenic fluid such as liquefied natural gas while preventing heat loss, and to a vacuum insulated pipe having the same. It's about plumbing.

In general, cryogenic fluids such as liquefied natural gas (LNG) or liquefied hydrogen have low temperatures and low latent heat, so they can be easily vaporized even by a small amount of heat penetration. Accordingly, vacuum insulated piping with excellent insulation performance is used to transport cryogenic fluids from storage tanks to distant equipment.

Vacuum insulated piping improves insulation performance by leaving a space between the inner pipe and the exterior and creating a vacuum in that space.

In these vacuum insulated pipes, there is a possibility of pressure loss in the vacuum layer between the inner pipe and the exterior or damage or destruction of the pipe due to vibration and external shock due to the flow of internal fluid, so a support is installed between the inner pipe and the exterior. This problem is prevented (see Publication Patent No. 10-2020-0112239).

However, the conventional support for vacuum insulated piping acts as a passage for transferring external heat to the inner pipe and affects the internal fluid, so it is necessary to use a material such as plastic with low thermal conductivity, but in this case, the supporting strength of the support decreases. There is a possible problem. This problem becomes more severe as the length of the vacuum insulated pipe increases.

Republic of Korea Patent Publication No. 10-2020-0112239 Republic of Korea Patent Publication No. 10-2022-0034958

The present invention is intended to solve the above-mentioned conventional problems. The purpose of the present invention is to prevent external heat from being transferred to the fluid flowing inside the pipe, thereby not impairing the insulation properties and at the same time, providing a vacuum system that can secure high support strength. The object is to provide a support for insulated piping and a vacuum insulated piping having the same.

A support for vacuum insulated piping according to the present invention to achieve the above object includes an inner tube through which a cryogenic fluid flows, an outer tube installed at a predetermined distance apart from the outer tube, and a vacuum layer formed between the inner tube and the outer tube. A support for vacuum insulated piping comprising: a support body formed to extend along the circumferential direction within the vacuum layer; a plurality of inner supports arranged at predetermined intervals along the circumferential direction of the support body and protruding inward in the radial direction and in close contact with the outer peripheral surface of the inner tube; And, a plurality of outer supports arranged between the inner supports on the support body and protruding outward in the radial direction and in close contact with the inner peripheral surface of the exterior.

The support body, the inner support portion, and the outer support portion may be made of fiber-reinforced plastic (FRP) material and may be integrally formed.

A support for vacuum insulated piping according to another form of the present invention includes an outer elastic pad made of an insulating resin material installed between the outer support part and the inner peripheral surface of the outer pipe, and an insulating resin pad installed between the inner support part and the outer peripheral surface of the inner pipe. It may further include an inner elastic pad made of material.

The circumferential width of the outer support portion may be smaller than the circumferential width of the inner support portion.

A support for vacuum insulated piping according to another form of the present invention is a cushion installed between the inner support part and the outer support part to elastically support the outer peripheral surface of the inner pipe with respect to the support body, and absorbs the vibration of the fluid transmitted through the inner pipe. Additional absences may be included.

A plurality of supports for vacuum insulated piping of the present invention may be arranged at predetermined intervals along the longitudinal direction on the inner pipe and the outer pipe.

According to the present invention, the support installed in the vacuum layer between the inner pipe and the exterior of the vacuum insulated pipe supports the inner pipe and the exterior with the inner and outer supports arranged alternately along the circumferential direction of the circular ring-shaped support body, and provides thermal insulation properties. And since it is made of fiber-reinforced plastic (FRP) material with excellent mechanical strength, heat transfer through the support can be minimized to achieve a high insulation effect and at the same time, a high support force can be obtained.

Figure 1 is an exploded perspective view showing a vacuum insulated pipe according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the vacuum insulated pipe shown in Figure 1.
Figure 3 is a cross-sectional view of a vacuum insulated pipe according to another embodiment of the present invention.
Figure 4 is a cross-sectional view of a vacuum insulated pipe according to another embodiment of the present invention.
Figure 5 is a cross-sectional view of a vacuum insulated pipe according to another embodiment of the present invention.

With reference to the attached drawings, a support for vacuum insulated pipe and a vacuum insulated pipe having the same according to embodiments of the present invention will be described in detail. Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. In the attached drawings, the dimensions of the structures are enlarged from the actual size for clarity of the present invention, or reduced from the actual size to understand the schematic configuration.

Additionally, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

1 and 2 are diagrams showing a vacuum insulated pipe to which a support for vacuum insulated pipe is applied according to an embodiment of the present invention. The vacuum insulated pipe (1) includes an inner pipe (10) through which a cryogenic fluid flows, and an inner pipe (10). ), an outer tube 20 installed at a certain distance apart on the outside, a vacuum layer 30 formed between the inner tube 10 and the outer tube 20, and a support 40 installed inside the vacuum layer 30. Includes.

The inner tube 10 and the outer tube 20 may be made of a metal tube with high strength. A cryogenic fluid such as liquefied natural gas flows inside the inner tube 10.

The outer pipe 20 is made of a pipe with a larger diameter than the inner pipe 10 and is installed at a certain distance apart from the inner pipe 10. The space between the inner tube 10 and the outer tube 20 is a vacuum layer 30 in a vacuum state to minimize heat transfer from the outside.

The support 40 is configured to provide high support to the inner tube 10 and the outer tube 20 while minimizing heat transfer within the vacuum layer 30 between the inner tube 10 and the outer tube 20.

Specifically, the support 40 includes a support body 41 formed to extend along the circumferential direction within the vacuum layer, and the support body 41 arranged at predetermined intervals along the circumferential direction and protruding inward in the radial direction. A plurality of inner supports 42 are in close contact with the outer peripheral surface of the inner tube 10, and are arranged between the inner support parts 42 in the support body 41 and are formed to protrude outward in the radial direction to form an inner peripheral surface of the exterior 20. It may include a plurality of outer supports 43 in close contact with.

The support body 41, the inner support part 42, and the outer support part 43 are made of fiber-reinforced plastic (FRP) and are formed as one piece. As the support 40 is made of fiber-reinforced plastic (FRP), it has the advantage of minimizing heat transfer through the inner tube 10 and the outer tube 20 and providing high support strength.

The inner support part 42 and the outer support part 43 are formed in a concavo-convex shape on the support body 41, and provide support force while directly or indirectly contacting the outer circumferential surface of the inner tube 10 and the inner circumferential surface of the outer tube 20, respectively. do. In order for the inner support part 42 and the outer support part 43 to be in close contact with the outer peripheral surface of the inner tube 10 and the inner peripheral surface of the outer surface 20, respectively, the inner support part 42 has a curvature corresponding to the outer peripheral surface of the inner tube 10. It is preferable that the outer support portion 43 is formed with a curvature corresponding to the inner peripheral surface of the outer surface 20.

In addition, the inner support part 42 and the outer support part 43 of the support 40 are completely adhered to the outer peripheral surface of the inner tube 10 and the inner peripheral surface of the outer tube 20, providing a stable support force, and the fluid flowing along the inside of the inner tube 10. In order to effectively absorb the vibration, an outer elastic pad 45 made of an insulating resin material is installed between the outer support portion 43 of the support 40 and the inner peripheral surface of the exterior 20, as shown in Figure 3. , an inner elastic pad 44 made of an insulating resin material can be installed between the inner support portion 42 and the outer peripheral surface of the inner tube 10.

The material of the outer elastic pad 45 and the inner elastic pad 44 may be urethane, but is not limited thereto and may be made of any material having excellent insulation and elasticity.

In this way, when the inner elastic pad 44 and the outer elastic pad 45 made of an insulating and elastic material are interposed between the inner support part 42 and the inner tube 10, the outer support part 43 and the outer tube 20, the inner support part 42 ) and the curvature of the outer support part 43 do not match the outer peripheral surface of the inner tube 10 and the inner peripheral surface of the outer tube 20, respectively, by attaching the inner support part 42 and the outer support part 43 to the inner tube 10 and the outer surface 20. Stable support and vibration absorption can be obtained by elastically adhering to the material.

In addition, as shown in FIG. 4, in order to more effectively prevent external heat from being transmitted through the outer support 43 in close contact with the exterior 20, the circumferential width of the outer support 43 is greater than the inner support 42. It can be formed to be smaller than the circumferential width of .

The support 40 having this configuration has inner supports 42 and outer supports 43 arranged alternately along the circumferential direction, and each of the inner supports 42 and outer supports 43 is arranged at a predetermined interval. Therefore, in order to secure the supporting force between the inner support part 42 and the outer support part 43, the support body 41 is provided between the inner support part 42 and the outer support part 43 as shown in FIG. In contrast, a plurality of cushion members 46 that elastically support the outer peripheral surface of the inner tube 10 may be additionally installed.

The cushion member 46 has a spherical or pillar shape and is made of a material with insulating and elastic properties, so that it elastically supports the outer peripheral surface of the inner tube 10 with respect to the support body 41, thereby transmitting the energy transmitted through the inner tube 10. It can effectively absorb the vibration of the fluid and at the same time increase the overall bearing capacity of the support 40.

The vacuum insulated pipe (1) of the present invention has a support (40) installed in the vacuum layer (30) between the inner pipe (10) and the outer pipe (20), and the inner support portion (42) and the outer support portion (43) have a circular ring shape. They are arranged alternately along the circumferential direction of the support body 41 to support the inner tube 10 and the outer tube 20, and are entirely made of fiber-reinforced plastic (FRP) material with excellent insulation and mechanical strength, so the support 40 By minimizing heat transfer through , high insulation effect can be achieved and high bearing capacity can be obtained at the same time.

A plurality of supports 40 of the present invention made of such structure and material may be arranged at predetermined intervals along the longitudinal direction on the inner tube 10 and the outer tube 20, but differently from this, the inner tube 10 and the outer tube 20 ) and may be installed over the entire length of the inner pipe 10 and the outer pipe 20.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those skilled in the art will understand the spirit of the present invention as described in the patent claims to be described later. It will be understood that the present invention can be modified and changed in various ways without departing from the technical scope.

1: Vacuum insulated pipe 10: Inner pipe
20: Appearance 30: Vacuum layer
40: Support 41: Support body
42: inner support 43: outer support
44: inner elastic pad 45: outer elastic pad
46: Cushion member

Claims (7)

In the support for vacuum insulated piping, which includes an inner tube through which a cryogenic fluid flows, an outer tube installed at a predetermined distance apart from the inner tube, and a vacuum layer formed between the inner tube and the outer tube,
A support body formed to extend along the circumferential direction within the vacuum layer;
a plurality of inner supports arranged at predetermined intervals along the circumferential direction of the support body and protruding inward in the radial direction and in close contact with the outer peripheral surface of the inner tube; and,
a plurality of outer supports arranged between the inner supports on the support body and protruding outward in a radial direction and in close contact with the inner peripheral surface of the exterior;
Support for vacuum insulated piping including. The support for vacuum insulated pipe according to claim 1, wherein the support body, the inner support portion, and the outer support portion are made of fiber-reinforced plastic (FRP) and are integrated into one body. The method of claim 1, further comprising an outer elastic pad made of an insulating resin material installed between the outer support part and the inner peripheral surface of the outer tube, and an inner elastic pad made of an insulating resin material installed between the inner support part and the outer peripheral surface of the inner tube. Support for vacuum insulated piping. The support for vacuum insulated pipe according to claim 1, wherein the circumferential width of the outer support portion is smaller than the circumferential width of the inner support portion. The support for vacuum insulated piping according to claim 1, further comprising a cushion member installed between the inner support portion and the outer support portion to elastically support the outer peripheral surface of the inner pipe with respect to the support body and absorbing vibration of the fluid transmitted through the inner pipe. . An inner tube through which cryogenic fluid flows;
An exterior installed at a certain distance apart from the outer side of the inner pipe;
A vacuum layer formed between the inner tube and the outer tube;
The support according to any one of claims 1 to 5 installed inside the vacuum layer;
Vacuum insulated piping including. The vacuum insulated pipe according to claim 6, wherein a plurality of the supports are arranged at predetermined intervals along the longitudinal direction on the inner pipe and the outer pipe.

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