Sumitomo Electric Industries, Limited

The Tokyo Electric Power Company, Incorporated

Other

Kimiyoshi Matsuo

Yoshihisa Takahashi

Shoichi Honjo

Tomoo Mimura

Takato Masuda

Yuuichi Ashibe

Hiroyasu Yumura

Terumitsu Aiba

Takeshi Kato

Masayuki Hirose

Michihiko Watanabe

Toru Okazaki

Jun Fujikami

Kouhei Furukawa

A phase split structure of a superconducting cable includes three cable cores each having a shield layer provided around a superconductor, a splitter box housing the three cable cores extending from an assembly portion where the three cable cores are assembled into the cable, in a state in which the cable cores are spaced apart from each other, and an electrically-conductive connecting portion connecting respective shield layers of the cable cores to each other within the splitter box. In this way, occurrence of a large magnetic field outside the cable cores can effectively be reduced.

Phase split structure of multiphase superconducting cable

A multiphase superconducting cable connection structure includes a connection box accommodating three conductor connects connecting a superconductor of a cable core of each phase extracted from a pair of 3-phase superconducting cables, a solid insulation member fixed to an outer circumference of each conductor connect, and a metal flange fixing the solid insulation member to the connection box. By fixing the metal flange to the connection box (a refrigerant vessel), the conductor connect can be positioned and the conductor connector's movement caused as the cable core thermally contracts can be reduced. The structure can help to position the conductor connect in the connection box and reliably hold it at a prescribed position.

Multiphase superconducting cable connection structure and multiphase superconducting cable line

A phase separation jig () for a superconducting cable includes: a cable holder () maintaining each core () of a multi-core superconducting cable () in a predetermined tolerable bending manner; and a coupler () holding the cable holder () for each core () at a predetermined spacing with each other. Each core () is spaced apart from each other and maintained in a tolerable bending manner by the holder (). Accordingly, a phase separation structure can be obtained which can regulate deformation of the cable and prevent abnormal deformation even for a superconducting cable.

Phase separation jig for superconductive cables and phase separation structure of superconductive cables

The present invention provides a terminal structure of a superconducting cable including a cable core having a superconducting shield layer and an electrical insulation layer. The superconducting shield layer has a radially outer portion provided with by a connection electrode and the superconducting shield layer and the connection electrode are connected together with a low melting solder. The connection electrode has a ground wire connected thereto to ground the superconducting shield layer. For a multiphase cable including a plurality of cable cores, connection electrodes are linked by a conductive coupling member to short circuit superconducting shield layers. The superconducting shield layer can be grounded without impaired insulating property of the electrical insulation layer.

Terminal structure of superconducting cable and superconducting cable line therewith

To provide a thermal insulation piping with no radially projecting part from a periphery thereof, so as to facilitate insertion of the thermal insulation piping into a pipeline or equivalent. In a thermal insulation tubehaving a vacuum layer between an inner tubeand an outer tube, an evacuation portfor vacuum evacuation is oriented parallel with a longitudinal direction of the thermal insulation piping at an end of the thermal insulation tube. This construction can produce the thermal insulation tubewith no radially projecting part from a periphery thereof, thus providing improved workability when the thermal insulation piping is contained in the pipeline or equivalent. Further, a flexible pipe(s)is/are preferably connected to the evacuation port(s). This can allow increased positional tolerances in the connection of the evacuation port(s) to a vacuum evacuation device.

Vacuum-insulated pipe

A joint structure of a superconducting cable having improved connection strength and preventing break of a superconducting layer is provided. A central conductor of an insulating spacer and a superconducting cable are connected via a conductor connecting member having a sleeve-shaped end. Specifically, the central conductor of the insulating spacer and the conductor connecting member are connected by multi-contact connection.

Joint structure of superconducting cable and insulating spacer for connecting superconducting cable

A termination structure of a cryogenic cable has a cryogenic-cable end portion and a current-lead end portion that are coupled to each other with a flexible conductor. Accordingly, any displacement in three-dimensional directions of the end portions that could occur due to thermal expansion and thermal contraction of the cryogenic cable and the current lead can be absorbed, and a sufficient current capacity can be ensured.

Termination structure of cryogenic cable

A baking method for heating an object (an inner pipe, an outer pipe) having a vacuum layer formed therein to remove gas molecules occluded in the object, wherein the object itself is made to be a heat production element for heating. By making the baking object a heat production element, the object can be heated directly and the heating can be energy-efficient. Moreover, additional heating means such as a heater or gas is unnecessary, which enables simplification of a configuration of a baking device. Therefore, a baking method is obtained which enables energy-efficient heating and, in particular, uniform heating of a long or large object.

Baking method

A terminal structure of cryogenic equipment for leading a terminal of cryogenic equipmentfrom a very low temperature portion to a room temperature portion through a bushing, having a feature in that a connecting/heat-insulating portionadiabatically connected with the aforementioned very low temperature portionand the aforementioned room temperature portionis provided along the outer circumference of the aforementioned bushingbetween the aforementioned very low temperature portionand the aforementioned room temperature portion

Terminal structure of extreme-low temperature equipment

A superconducting cable is manufactured by providing spacers in a plurality of cores at the time of stranding of the cores , and removing the spacers before the stranded cores are housed in a thermally insulated pipe and housing the cores into the thermally insulated pipe while the strands are held in a slacked state. By means of temporal interposition of the spacers, there is easily manufactured three cores having sufficient slack to manage thermal contraction which occurs when the cores are cooled in the thermally insulated pipe.

Method of manufacturing superconducting cable

A superconducting cable includes a core material, conductor layers formed by means of helically winding superconducting wires around the core material, electrically insulating layers, and magnetic shielding layers formed by means of helically winding superconducting wires around each of the electrically shielding layers. The superconducting wire is wound at the shortest pitch on the outermost conductor layer and is wound at the longest pitch on the outermost magnetic shielding layer.

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Tokyo, Japan

Kimiyoshi Matsuo