Abstract:
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 (3, 4) seated on the substrate (1) and spaced apart from each other at a longitudinal axial distance, a tube section (5) supported on the rings (3, 4) and a second ring (6) disposed on the tube section (5). The first rings (3, 4), the tube section (5) and the second ring (6) are made of a material with poor thermal conductivity and high mechanical strength.
Abstract:
In a flexible line pipe comprising an inner corrugated metal tube (4), an outer corrugated metal tube (5) located at some distance from the inner tube (4) and a spacer as well as an insulation material between the inner and the outer metal tubes, whereby a pressure that is less than atmospheric pressure prevails in the ring-shaped gap (6) between the tubes, the spacer comprises two cords (7, 8) made of fiber-reinforced plastic applied to the inner tube (4) and wrapped in opposite directions. The insulation material (9) is a fleece material, and the pressure in the ring-shaped gap is between 10−3 and 10−1 mbar.
Abstract:
Two corrugated metal tubes in a low temperature conduit system are spaced apart by a ceramic spacer made of braided ceramic threads, each thread being composed of stranded or twisted together ceramic filaments, the space between adjacent loops of this spacer is filled with super-insulation being comprised of multiple metal foils spaced apart by a ceramic webbing, mesh, plaits, sheets or the like.
Abstract:
A system is provided having a superconductive cable (KA) which consists of a superconductive inner conductor (1), a screen arranged concentrically therewith and a dielectric applied (3) between the inner conductor and the screen. The screen (S) is constructed from a superconductive part (4) and a part (5) consisting of an electrically highly conductive material enclosing the latter, and in which the screen is enclosed with the inclusion of an intermediate space (9), used for feeding a liquid refrigerant through, by a cryostat (KR) which consists of two stainless steel tubes (6, 7) extending concentrically with one another and separated from one another by an intermediate space (8). In order to protect against abrasion of metallic parts, the surface of the screen (S) of the cable (KA), which is enclosed by the cryostat (KR), and/or of the cryostat (KR) is provided all around on its inner surface with a liner layer (10) made of an abrasion-resistant material with a lower friction coefficient compared with steel, which, when it encloses the screen (S) of the cable (KA), is permeable for the refrigerant.
Abstract:
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.
Abstract:
A termination for a superconductive cable (1) is provided, consisting of a pressure-tight metal inner container (2) in which there is a liquid refrigerant and into which the cable protrudes, and a metal outer container (3) which is separated from the inner container by an intermediate space (4) in which vacuum insulation is applied. A first rupture diaphragm (6) is applied in the wall of the inner container (2) and a second rupture diaphragm (7) is applied in the wall of the outer container (3) level with the first rupture diaphragm (6). An evacuated relief space (8), which contains superinsulation and is sealed from the intermediate space (4) with the vacuum insulation by a pressure-tight wall (9), is provided between the two rupture diaphragms (6, 7).
Abstract:
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 (7) is mounted, in the direction of movement of the bellows (5), 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 (5). A tube (9) connected fixedly to the wall (2) is mounted around the bellows (5), so as to maintain an air gap, surrounds the bellows (5) in a moisture-tight manner and is longer than the bellows (5) in its longest initial position corresponding to the expanded state. The proximity switch (7) projects into the tube (9) so as to be sealed off with respect to the latter.
Abstract:
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 concertina, 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 (7) is mounted, in the direction of movement of the concertina (5), 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 concertina (5). A tube (9) connected fixedly to the wall (2) is mounted around the concertina (5), so as to maintain an air gap, surrounds the concertina (5) in a moisture-tight manner and is longer than the concertina (5) in its longest initial position corresponding to the expanded state. The proximity switch (7) projects into the tube (9) so as to be sealed off with respect to the latter.
Abstract:
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.
Abstract:
A pipeline for the transport of refrigerated media, including at least two metal pipes, positioned concentrically and at a distance to one another, an insulating layer made of layers of insulating material and reflecting material alternately positioned over one another being provided in the ring gap between the metal pipes and the ring gap being evacuated and a spacer in the form of a helix being wound onto the inner pipe. The spacer (3) is a metal wire (3a), onto which bodies (3b) made of a mechanically resistive insulating material, which are provided with a hole, are threaded at specific intervals. The layers (4b) made of insulating material are made of nonwoven glass or ceramic