Nexans

Alcatel

Klaus Schippl

Stephan Lange

Christian Frohne

Michele Di Palma

Frank Schmidt

Mark Stemmle

Nicolas Lallouet

Pierre Mirebeau

Friedrich Harten

Ing Christian Frohne

Thomas Merten

A method for cooling a plant for superconductive cables is provided, where the plant includes two thermally insulated end closures () and at least one thermally insulated, tubular cryostat () arranged between the end closures, in which at least one superconductive cable is arranged. Liquid nitrogen contained in a cooling agent supply is pumped by means of a pump () through a first end closure and the cryostat to a second end closure. At least one vacuum insulated tank () is used for the cooling agent supply, where the tank () contains nitrogen at operating temperature and out of which the nitrogen is pumped. For making available a quantity of liquid nitrogen necessary for operating the plant, the supply of liquid nitrogen contained in the tank () is supplemented during operation or is switched over to another tank () containing liquid nitrogen.

Method for cooling a plant for superconductive cables

An arrangement is provided for a helically corrugated pipe made of metal, which has an end face extending along a turn of the thread of its corrugation and a connecting element to be fastened to the pipe. The connecting element includes a pipe piece which has a helically extending inner surface corresponding to the turn of the thread of the corrugation of the pipe. The pipe piece is mounted on the pipe in the corrugation of the pipe. A metal ring is arranged on the pipe piece, where the pipe piece has sections with different inner diameters arranged one behind the other in the axial direction.

Arrangement with a metal pipe and a connecting element, as well as method of mounting the connecting element

An arrangement is provided with at least one superconductive cable and a cryostat surrounding the cable is disclosed. The cryostat includes at least one thermally insulated pipe which encloses the superconductive cable and a hollow space for conducting a cooling agent therethrough. The cryostat is constructed in the same manner as the superconductive cable located in the cryostat for connection to stationary parts of a transmission path for electrical energy. At each of the ends of the cryostat (KR) constructed for connection to the stationary parts of the transmission path, two spaced apart bellows are mounted in the cryostat (KR), and between the two bellows each of the two ends of the cryostat (KR) a thermally insulated and curved pipe piece is mounted belonging to the cryostat (KR).

Arrangement with at least one superconductive cable

An arrangement is provided for a helically undulated pipe made of metal, which has an end face extending along a turn of the thread of its undulation and a connecting element to be fastened to the pipe. The connecting element includes a pipe piece which has a helically extending inner surface corresponding to the turn of the thread of the undulation of the pipe. The pipe piece is mounted on the pipe in the undulation of the pipe. A metal ring is arranged on the pipe piece, where the pipe piece has sections with different inner diameters arranged one behind the other in the axial direction.

A coupling arrangement has a coupling body and a helically shaped undulated metal pipe which has an end face extending along a screw thread of its undulation. A metal holding ring is mounted on the connecting part resting against the latter, where the outer diameter of the holding ring corresponds approximately to the outer diameter of the pipe, where the end face of the holding ring facing the pipe extends along a screw thread corresponding to the screw thread of the pipe, and where the holding ring is connected in the mounted position, fixedly to the connecting part by resting fixedly and tightly against the end face of the pipe.

Coupling arrangement comprising a coupling body and a metal pipe, as well as method for assembly of the coupling body

A plug-in coupling for cryogenic lines is described, having at least two pipes () fitted one inside the other like a male/female connection while forming an annular gap (), in which plug-in coupling the pipes () are releasably connected to one another by a flange connection () located at their 'warm' end, the annular gap () between the two pipes () is sealed at the 'cold' end by an annular seal () and at the &#x201c;warm&#x201d; end by an annular seal () located in the region of the flange connection (), and the annular gap () is connected to a safety valve () in the region of the flange connection ().

Plug-in coupling for cryogenic lines

A termination for a superconductive cable () is provided, consisting of a pressure-tight metal inner container () in which there is a liquid refrigerant and into which the cable protrudes, and a metal outer container () which is separated from the inner container by an intermediate space () in which vacuum insulation is applied. A first rupture diaphragm () is applied in the wall of the inner container () and a second rupture diaphragm () is applied in the wall of the outer container () level with the first rupture diaphragm (). An evacuated relief space (), which contains superinsulation and is sealed from the intermediate space () with the vacuum insulation by a pressure-tight wall (), is provided between the two rupture diaphragms ().

Termination for a superconductive cable

An arrangement for monitoring the leak-tightness of an evacuated space which is hermetically closed, leak-tight, by means of at least one metallic wall is specified. A device which is connected to the evacuated space indicates an inadmissible pressure rise in the evacuated space caused by a leak in the wall. The device includes a metallic bellows, which is hermetically connected, leak-tight, to the evacuated space, and an electrical proximity switch to which an evaluation unit is connected. The proximity switch () is mounted, in the direction of movement of the bellows (), at a distance from the end face of the latter, the size of which is varied as a function of the respective axial length of the bellows (). A tube () connected fixedly to the wall () is mounted around the bellows (), so as to maintain an air gap, surrounds the bellows () in a moisture-tight manner and is longer than the bellows () in its longest initial position corresponding to the expanded state. The proximity switch () projects into the tube () so as to be sealed off with respect to the latter.

Arrangement for monitoring the leak-tightness of an evacuated space

A line pipe for the transport of deep-frozen media, consisting of at least two corrugated metal pipes () arranged concentrically and at a distance from one another, an insulation layer () being arranged in the annular gap between the two metal pipes (), the annular gap being evacuated, and a closing valve () provided in the outer metal pipe () being connectable to a vacuum pump, the closing valve being welded, vacuum-tight, into a smooth-walled metal pipe () welded, vacuum-tight, to the exterior of the metal pipes (). The valve body () of the closing valve projects into the interior of the smooth-walled metal pipe () and is flush with the outer surface area of the smooth-walled metal pipe ().

Line pipe for the transport of deep-frozen media

A double-wall tank for storing and shipping cryogenic media, which consists of an inner tank that contains the medium, an outer casing spaced some distance from the inner tank, and an evacuated space located between the inner tank and the outer casing, such that at least one permanent magnet is installed in the evacuated space and is arranged opposite a high-temperature superconductor, so that the inner tank is supported in the casing without contact, has the following features:

Double-wall tank

A connection arrangement for electrically interconnecting the shields of so-called 'cold-dielectric' superconductor cables in the context of a muiltiphase superconductive electrical link, each super-conductor cable comprising a central superconductor presenting superconductivity at cryogenic temperature, electrical insulation surrounding the central conductor, a shield surrounding the electrical insulation, and a cryostat surrounding said shield. According to the invention, the arrangement comprises a superconductive link between said shields, said superconductive link comprising a link superconductor and a cryogenic sheath surrounding said link superconductor, each of the two ends of said link superconductor being connected to a respective one of said shields by connection means that are both electrically and thermally conductive. The invention is particularly applicable to high voltage electricity.

Connection arrangement for superconductor cable shields

A process is provided for the production of a superconducting cable having a single cable core that contains at least one elongated superconducting element and a flexible tube that which surrounds the cable core. The process includes continuously pulling the single cable core from a supply unit, continuously pulling a metal strip from a strip supply unit and continuously forming a slotted tube around the cable care with the metal strip to form a slotted tube. The longitudinal slot of the slotted tube is welded shut corrugating the welded tube with the cable core inside the tube. The then semi-finished superconducting cable is wound in at least one turn on a cable drum, and the ends of the cable core are mechanically joined to the ends of the corrugated tube while the cable is on the cable drum.

Process for producing a superconducting cable

A magnetic bearing of a rotor shaft relative to a stator is described, which has the following features:

Magnetic bearing

A conduit for the transport of cryogenic media, in particular a superconducting cable, includes at least two metal pipes arranged concentrically and spaced apart from one another, an insulation layer being situated in the annular gap between the metal pipes and the annular gap being evacuated. The exterior of the metal pipe () is separated at predetermined intervals and above each opening a pump connector () is welded vacuum-tight to the outer metal pipe ().

Conduit for the transport of cyrogenic media

A spacer for a long substrate in the interior of a long tube, with a superinsulation material being disposed between the substrate and the tube. The spacer includes two rings () seated on the substrate () and spaced apart from each other at a longitudinal axial distance, a tube section () supported on the rings () and a second ring () disposed on the tube section (). The first rings (), the tube section () and the second ring () are made of a material with poor thermal conductivity and high mechanical strength.

Growing community of inventors

Hannover, Germany

Klaus Schippl