Transportation pipe

Patent metadata

Field	Value
Publication number	US-11209117-B2
Application number	US-201716321386-A
Country	US
Kind code	B2
Filing date	Jul 28, 2017
Priority date	Jul 29, 2016
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A transportation pipe includes a main-body vacuum insulated pipe, a central pipe, and a connecting vacuum insulated pipe. The main-body vacuum insulated pipe including a double pipe structure includes a vacuum part in a region between an inner pipe and an outer pipe. The central pipe through which a fluid to be transported flows, is arranged in the main-body vacuum insulated pipe. The connecting vacuum insulated pipe having a double pipe structure includes a vacuum part in a region between an inner pipe and an outer pipe. In a state in which two main-body vacuum insulated pipes are inserted into the connecting vacuum insulated pipe from respective ends of the connecting vacuum insulated pipe, ends of the main-body vacuum insulated pipes are away from one another, and the main-body vacuum insulated pipes are connected to one another via the connecting vacuum insulated pipe.

First claim

The invention claimed is:

1. A transportation pipe comprising:
first and second main-body vacuum insulated pipes each having (i) a double pipe structure with an inner pipe and an outer pipe, and (ii) a vacuum part in a region between the inner pipe and the outer pipe;
first and second central pipes through which a fluid to be transported flows, the first central pipe being arranged in the first main-body vacuum insulated pipe, the second central pipe being arranged in the second main-body vacuum insulated pipe;
a connecting vacuum insulated pipe having (i) a double pipe structure with an inner pipe and an outer pipe, and (ii) a vacuum part in a region between the inner pipe of the connecting vacuum insulated pipe and the outer pipe of the connecting vacuum insulated pipe,
wherein in a state in which the first and second main-body vacuum insulated pipes are inserted in respective ends of the connecting vacuum insulated pipe, ends of the first and second main-body vacuum insulated pipes are away from one another, and the first and second main-body vacuum insulated pipes are connected to one another via the connecting vacuum insulated pipe,
wherein the connecting vacuum insulated pipe is slidable in both an axial direction and a rotational direction around an axis with respect to the first and second main-body vacuum insulated pipes,
wherein the connecting vacuum insulated pipe is not present between the ends of the first and second main-body vacuum insulated pipes,
wherein the connecting vacuum insulated pipe is a cylindrical straight pipe, and
wherein insertion margins of the connecting vacuum insulated pipe and the first and second main-body vacuum insulated pipes have a length less than a length of the first and second main-body vacuum insulated pipes.

2. The transportation pipe according to claim 1 , wherein the outer pipe of the first and second main-body vacuum insulated pipes is a straight pipe.

3. The transportation pipe according to claim 1 , wherein the inner pipe of the connecting vacuum insulated pipe is a straight pipe.

4. The transportation pipe according to claim 1 , wherein the connecting vacuum insulated pipe is corrugated over a full length or a part of the length of the connecting vacuum insulated pipe.

5. The transportation pipe according to claim 1 , wherein the connecting vacuum insulated pipe has a halved structure.

6. The transportation pipe according to claim 1 , wherein a spacer is provided between the first central pipe and the first main-body vacuum insulated pipe, and a spacer is provided between the second central pipe and the second main-body insulated pipe.

7. The transportation pipe according to claim 1 , wherein a seal material is provided between the connecting vacuum insulated pipe and each of the first and second main-body vacuum insulated pipes.

8. The transportation pipe according to claim 1 , wherein the first and second central pipes are not fixed to the first and second main-body vacuum insulated pipes, respectively.

9. The transportation pipe according to claim 1 , further comprising a connection part where the first and second central pipes are directly connected to one another, wherein
the connection part is away from the ends of the first and second main-body vacuum insulated pipes.

10. The transportation pipe according to claim 1 , wherein the inner pipe of the connecting vacuum insulated pipe has a diameter that is larger than a diameter of the outer pipe of the first and second main-body vacuum insulated pipes, and the connecting vacuum insulated pipe has a length that is shorter than a length of the first and second main-body vacuum insulated pipes.

11. The transportation pipe according to claim 1 , wherein the connecting vacuum insulated pipe extends over the ends of the first and second main-body vacuum insulated pipes to form a coupling between the connecting vacuum insulated pipe and the first and second main-body vacuum insulated pipes.

12. The transportation pipe according to claim 1 , wherein the inner pipe and the outer pipe of the connecting vacuum insulated pipe are each a cylindrical straight pipe having a pipe wall that is not rugged or corrugated.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Yagi Masashi
• Fukushima Hiroyuki
• Takagi Tomohiro

Classifications

• F16L59/065 Primary

  using vacuum (F16L59/075 takes precedence) · CPC title

• F16L59/182

  Joints with sleeve or socket · CPC title

• F16L59/141

  in which the temperature of the medium is below that of the ambient temperature · CPC title

• F16L59/14 Primary

  Arrangements for the insulation of pipes or pipe systems (F16L59/02 - F16L59/12 take precedence) · CPC title

• F16L59/22

  adapted for bends · CPC title