CONNECTED STRUCTURE OF VACUUM DOUBLE PIPE, VACUUM DOUBLE PIPE, AND JOINT OF VACUUM DOUBLE PIPE

• US 20110233923A1
• Filed: 03/28/2011
• Published: 09/29/2011
• Est. Priority Date: 03/29/2010
• Status: Active Grant

• Current Assignee: CKD Corporation, Mirapro Co., Ltd.
• Original Assignee: CKD Corporation, Mirapro Co., Ltd.
• Inventors: KOUKETSU, Masayuki, KOHNO, Yasushi, HAYAKAWA, Shinji, ITAFUJI, Hiroshi
• Granted Patent: US 8,590,942 B2
• Time in Patent Office: Days
• US Class Current: 285/123.3
• CPC Class Codes: F16L 39/005 for concentric pipes
• CPC Class Codes: F16L 59/065 using vacuum F16L59/075 takes precedence
• CPC Class Codes: F16L 59/182 Joints with sleeve or socket in general F16L21/00
• CPC Class Codes: H01L 21/67017 Apparatus for fluid treatment H01L21/67126, H01L21/6715 take precedence

Abstract

This invention provides a connected structure of vacuum double pipes. The connected structure comprises a plurality of vacuum double pipes and a joint configured to connect the plurality of vacuum double pipes. The vacuum passage is open at both end in an extension direction of the inner pipe and sealed between the both ends. The joint includes an inner pipe joint unit having inner pipe connectors and an outer pipe joint unit having outer pipe connectors. The evacuation passage is sealed between the outer pipe connectors that connect the vacuum passages of the outer pipes.

Claims

1. A connected structure of vacuum double pipes, comprising:

a plurality of vacuum double pipes, each of the plurality of vacuum double pipes including an inner pipe having a flow passage for flowing a fluid, and an outer pipe that covers the inner pipe to form a vacuum passage between the inner pipe and the outer pipe; and

a joint configured to connect the plurality of vacuum double pipes, wherein

the vacuum passage is open at both end in an extension direction of the inner pipe and sealed between the both end, wherein

the joint includes;

an inner pipe joint unit having inner pipe connectors, each of the inner pipe connectors being connected to each of the inner pipes for connecting the flow passages of the inner pipes, the inner pipe joint unit being sealed between the inner pipe connectors; and

an outer pipe joint unit having an outer pipe connectors, each of the outer pipe connectors being connected to each of the outer pipes, the outer pipe joint unit forming a evacuation passage between the inner pipe and the outer pipe, wherein

the evacuation passage is sealed between the outer pipe connectors that connect the vacuum passages of the outer pipes.

2. The connected structure of vacuum double pipes according to claim 1, further comprising:

an inner pipe sealing structure configured to form a seal between the inner pipes and the inner pipe connectors in a radial direction of the inner pipe;

an outer pipe sealing structure configured to form a seal between the outer pipes and the outer pipe connectors; and

an outer pipe connecting structure configured to connect the outer pipes and the outer pipe connectors detachably.

3. The connected structure of vacuum double pipes according to claim 2, wherein

the outer pipe sealing structure includes an outer pipe sealing member that forms a seal between the outer pipe and the outer pipe connectors in an extension direction of the outer pipe, and

the outer pipe connecting structure maintains a connection between the outer pipe and the outer pipe connectors in a state where the outer pipe sealing member is deformed by a predetermined amount.

4. The connected structure of vacuum double pipes according to claim 2, wherein

the outer pipe connector includes a manipulator configured to manipulate the outer pipe connecting structure to disconnect the outer pipe and the outer pipe connector.

5. The connected structure of vacuum double pipes according to claim 4, wherein

the manipulator includes a visual confirmation unit configured to enable visual confirmation for a connection of the outer pipe and the outer pipe connector by the outer pipe connecting structure.

6. The connected structure of vacuum double pipes according to claim 1, wherein

a plurality of nodes projecting in an annular shape outwardly in the radial direction are formed at intervals in at least one of the inner pipe and the outer pipe of the vacuum double pipe by bending a pipe wall of the at least one of the inner pipe and the outer pipe.

7. The connected structure of vacuum double pipes according to claim 6, wherein

the plurality of nodes are formed at intervals in the outer pipe.

8. The connected structure of vacuum double pipes according to claim 6, wherein

the plurality of nodes are formed at intervals in the inner pipe.

9. The connected structure of vacuum double pipes according to claim 6, wherein

the plurality of node portions are formed at intervals in both the inner pipe and the outer pipe.

10. The connected structure of vacuum double pipes according to claim 6, wherein

the plurality of nodes are formed at intervals in at least one of the inner pipe and the outer pipe continuously, the continuously provided nodes forming a bellows.

11. The connected structure of vacuum double pipes according to claim 6, wherein

the inner pipe and the outer pipe are supported relative to each other in a state of point contact or line contact.

12. The connected structure of vacuum double pipes according to claim 11, further comprising

a support member mounted on an outer periphery of the inner pipe, and

a plurality of projecting portions provided on an outer periphery of the support member, wherein

the outer pipe is supported in a state of point contact or line contact by the plurality of projecting portions.

13. The connected structure of vacuum double pipes according to claim 12, wherein

the plurality of nodes are formed at intervals in the inner pipe, and

the support member is mounted on the node portions of the inner pipe.

14. The connected structure of vacuum double pipes according to claim 1, wherein

the inner pipe joint unit and the outer pipe joint unit are supported relative to each other in a state of point contact or line contact.

15. The connected structure of vacuum double pipes according to claim 1, further comprising

a support member mounted on an outer periphery of the inner pipe joint portion, and

a plurality of projecting portions provided on an outer periphery of the support member, wherein

the outer pipe joint unit is supported in a state of point contact or line contact by the plurality of projecting portions may be employed.

16. The connected structure of vacuum double pipes according to claim 1, wherein

the joint constitutes a valve unit for controlling a fluid flowing through the inner pipe of the vacuum double pipe,

the inner pipe joint unit constitutes a fluid passage connected to the inner pipe, the fluid passage enabling the flow of a fluid from the inner pipe flows,

the valve unit includes a valve having a valve main body and a valve body for controlling the fluid flowing through the fluid passage,

the outer pipe joint unit constitutes a valve case that covers the fluid passage and the valve main body and is connected to the outer pipe,

the joint evacuation passage is formed by a space between the fluid passage portion and valve and the valve case, and

the joint evacuation passage connects spaces between inner pipes and outer pipes of the vacuum double pipes, the joint evacuation passage being sealed between the vacuum double pipes.

17. A vacuum double pipe, comprising

an inner pipe configured to allow a flow of a fluid;

and

an outer pipe configured to cover the inner pipe, wherein

the at least one of the inner pipe and the outer pipe includes a plurality of nodes projecting in an annular shape outwardly in the radial direction formed at intervals, the plurality of nodes being formed by bending a pipe wall of the at least one of the inner pipe and the outer pipe,

an evacuation passage is formed by a space between the inner pipe and the outer pipe, and

the evacuation passage is open at both end and sealed between the both end in an extension direction of the inner pipe, for forming a vacuum passage between the inner pipe and the outer pipe.

18. A joint for connecting a plurality of vacuum double pipes, wherein

each of the plurality of vacuum double pipes having an inner pipe and an outer pipe covering the inner pipe, for forming a vacuum passage between the inner pipe and the outer pipe,

the joint comprising:

an inner pipe joint unit having inner pipe connector connected to the inner pipe in order to connect flow passages of the inner pipes, the inner pipe joint unit being sealed between the inner pipe connectors; and

an outer pipe joint unit that covers the inner pipe joint unit and includes outer pipe connector connected to the outer pipes, wherein

the inner pipe joint unit and the outer pipe joint unit forms a joint evacuation passage between the inner pipe joint unit and the outer pipe joint unit, and

the joint evacuation passage connects the vacuum passage and is sealed between the outer pipe connectors.

19. The joint according to claim 18, wherein

the joint constitutes a valve unit for controlling a fluid flowing through the inner pipe of the vacuum double pipe,

the inner pipe joint unit constitutes a fluid passage connected to the inner pipe, the fluid passage enabling the flow of a fluid from the inner pipe flows,

the valve unit includes a valve having a valve main body and a valve body for controlling the fluid flowing through the fluid passage,

the outer pipe joint unit constitutes a valve case that covers the fluid passage and the valve main body and is connected to the outer pipe,

the joint evacuation passage is formed by a space between the fluid passage portion and valve and the valve case, and

the joint evacuation passage connects spaces between inner pipes and outer pipes of the vacuum double pipes, the joint evacuation passage being sealed between the vacuum double pipes.