Patent EP0188389A2 successfully refreshed from Google Patents.
EP0188389A2
Expired / Lapsed
EP
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Cryogenic vessel for a superconducting apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1986-01-17
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Granted: —
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Expires: 2006-01-17
Abstract
Abstract A cryogenic vessel for a superconducting apparatus has an inner vessel (3) which houses a cryogenic medium e.g. He and a winding of a superconducting apparatus. The inner vessel is surrounded by a vacuum insulating vessel (4) which thermally insulates the inner vessel. A connecting pipe (7) connects the inside of the inner vessel with the outside of the vacuum insulating vessel. A cylindrical dividing pipe (21) surrounds the connecting pipe with a radial clearance therebetween, extends into the inner vessel and is connected between the inner end of the connecting pipe and the inner vessel. A gas flow passageway is formed between the inner end and the outer end of the connecting pipe, the passageway bordering on the inner or outer surface of the connecting pipe. During normal operation, gas which is formed by the vaporization of a cryogenic medium contained inside the inner vessel continually passes along the passageway, absorbing heat from the connecting pipe and reducing the amount of heat which penetrates into the inner vessel by conduction along the connecting pipe. A wiring support pipe for the power supply leads is a single, rigid pipe (70) which has one of its ends connected to the inner vessel or the vacuum insulating vessel by a flexible tube (71) which absorbs thermal shrinkage. Since the wiring support pipe is a single, rigid pipe, it undergoes thermal shrinkage by about the same amount as the power supply leads which it supports, and thermal stresses do not develop in the power SUDDlV leads.
Inventors
- 👤 Takahiro C/O Ako Works Matsumoto
- 👤 Tetsuo C/O Ako Works Nishio
- 👤 Hirofumi C/O Ako Works Maekawa
- 👤 Hisashi C/O Ako Works Oota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:50
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; H01F6/065; G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; G01R33/3815; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/892
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
174 words
1 . A cryogenic vessel for a superconducting apparatus comprising: an inner vessel (3) for containing a superconducting winding of a superconducting device and a cryogenic medium (2); a vacuum insulating vessel (4) which surrounds said inner vessel so as to thermally insulate it; a connecting pipe (7) which extends into said inner vessel whose inner end opens onto the inside of said inner vessel and whose outer end opens onto the outside of said vacuum insulating vessel; and a rupture-type safety valve (8) disposed at one of the ends of said connecting pipe, characterised in that a dividing pipe (21) has its outer end secured to the outer surface of said inner vessel (3) and its inner end extends into said inner vessel, the connecting pipe (7) extends along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe, and the inner end of said connecting pipe is connected to the inner end of said dividing pipe.
Claim 2
Dependent Claim
174 words
1 . A cryogenic vessel for a superconducting apparatus comprising: an inner vessel (3) for containing a superconducting winding of a superconducting device and a cryogenic medium (2); a vacuum insulating vessel (4) which surrounds said inner vessel so as to thermally insulate it; a connecting pipe (7) which extends into said inner vessel whose inner end opens onto the inside of said inner vessel and whose outer end opens onto the outside of said vacuum insulating vessel; and a rupture-type safety valve (8) disposed at one of the ends of said connecting pipe, characterised in that a dividing pipe (21) has its outer end secured to the outer surface of said inner vessel (3) and its inner end extends into said inner vessel, the connecting pipe (7) extends along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe, and the inner end of said connecting pipe is connected to the inner end of said dividing pipe.
Claim 3
Dependent Claim
39 words
A cryogenic vessel as claimed in claim 1, characterised by cooling means for cooling said connecting pipe (7) by continually passing along the surface of said connecting pipe gas which has formed by the vaporization of the cryogenic medium.
Claim 4
Dependent Claim
212 words
A cryogenic vessel as claimed in claim 2, wherein said cooling means comprises: an inner pipe which is disposed inside said connecting pipe with a radial clearance therebtween and which extends substantially the entire length of said connecting pipe: a spiral-shaped member which is wound around and projects from said inner pipe and contacts the outer surface of said inner pipe and the inner surface of said connecting pipe along the entire length of said spiral-shaped member. thereby forming a spiral-shaped gas flow passageway between said inner pipe and said connecting pipe. said gas flow passageway opening onto the inside of said inner vessel at its inner end and onto the outside of said vacuum insulating vessel at its outer end; and a plurality of disk-shaped dividing plates having substantially the same diameter as the inner diameter of said inner pipe. said dividing plates being disposed inside said inner pipe so as to divide the inside of said inner pipe into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity. said rupture-type safety valve being installed on one of the ends of said inner pipe so as to seal said end of said inner pipe without obstructing said gas flow passageway.
Claim 5
Dependent Claim
20 words
A cryogenic vessel as claimed in Claim 3. wherein each of said dividing plates has a pressure-equalizing hole formed therein.
Claim 6
Dependent Claim
110 words
A cryogenic vessel as claimed in Claim 2. wherein said cooling means comprises: a rod which extends into said connecting pipe for substantially the entire length of said connecting pipe and which is supported by the outer end of said connecting pipe: a plurality of disk-shaped dividing plates which are secured to said rod. each of said dividing plates being made of a material with a low thermal conductivity. the diameter of each c: said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of'said dividing plates and the inner surface of said connecting plate.
Claim 7
Dependent Claim
28 words
A cryogenic vessel as claimed in Claim 5. wherein: said connecting pipe is disposed at an angle of approximately 10 - 20 degrees with respect to the horizontal.
Claim 8
Dependent Claim
148 words
A cryogenic vessel as claimed in Claim 2. wherein said cooling means comprises: a pipe for injection of cryogenic medium which is disposed inside said connecting pipe. the inner end of said pipe for injection extending into said inner vessel and the outer end of said pipe for injection extending to the outside of said connecting pipe: and : a plurality of disk-shaped dividing plates which are mounted on said hollow pipe and divide the inside of said connecting pipe in the longitudinal direction into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity. the outer diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of said dividing plates and the inner surface of said connecting pipe.
Claim 9
Dependent Claim
84 words
A cryogenic vessel as claimed in any one of Claims 1 through 7. further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe which surrounds said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel: and a flexible tube. the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigidly connected to said inner vessel.
Claim 10
Dependent Claim
85 words
A cryogenic vessel as claimed in any of Claims 1 through 7. further comprising: a power supply lead for said superconducting winding; a rigid wiring support pipe which surrounds and supports said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel; and a flexible tube. the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.
Claim 11
Dependent Claim
42 words
A cryogenic vessel as claimed in any one of Claims 1 through 7. further comprising a flexible tube which is connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.
Claim 12
Dependent Claim
34 words
A cryogenic vessel as claimed in any one of Claims 1 through 7. further comprising a flexible tube which is connected between the outer end of said connecting pipe and said vacuum insulating vessel.
Claim 13
Dependent Claim
79 words
A cryogenic vessel as claimed in Claim 10. further comprising: a power supply lead for said superconducting winding; a rigid wiring support pipe which surrounds said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel: and a flexible tube. the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigidly. connected to said inner vessel.
Claim 14
Dependent Claim
81 words
A cryogenic vessel as claimed in Claim 10. further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe which surrounds and supports said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel: and a flexible tube. the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.
Claim 15
Dependent Claim
79 words
A cryogenic vessel as claimed in Claim 11. further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe which surrounds said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel: and a flexible tube. the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigidly connected to said inner vessel.
Claim 16
Dependent Claim
81 words
A cryogenic vessel as claimed in Claim 11. further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe which surrounds and supports said power supply lead and which penetrates said inner vessel and said vacuum insulating vessel: and a flexible tube. the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.
Claim 17
Dependent Claim
56 words
A cryogenic vessel as claimed in Claim 1. further comprising: a power supply lead for said superconducting winding which is disposed inside and supported by said connecting pipe; and a flexible tube which is connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.
Claim 18
Dependent Claim
48 words
A cryogenic vessel as claimed in Claim 1. further comprising: a power supply lead for said superconducting winding which is disposed inside and supported by said connecting pipe: and a flexible tube which is connected between the outer end of said connecting pipe and said vacuum insulating vessel.
Claim 19
Dependent Claim
22 words
A cryogenic vessel as claimed in any of the preceding claims in which the inner vessel and vacuum insulating vessel are cylindrical.
Claim 20
Dependent Claim
18 words
A cryogenic vessel as claimed in any of the preceding claims in which the dividing pipe is cylindrical.
References Cited (Backward Citations)
No citation records indexed.
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