WO2005086307A1 - 超電導ケーブルの接続構造 - Google Patents
超電導ケーブルの接続構造 Download PDFInfo
- Publication number
- WO2005086307A1 WO2005086307A1 PCT/JP2005/002418 JP2005002418W WO2005086307A1 WO 2005086307 A1 WO2005086307 A1 WO 2005086307A1 JP 2005002418 W JP2005002418 W JP 2005002418W WO 2005086307 A1 WO2005086307 A1 WO 2005086307A1
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- WIPO (PCT)
- Prior art keywords
- connection
- box
- cable
- superconducting
- pressure
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/68—Connections to or between superconductive connectors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
- H02G15/24—Cable junctions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/34—Cable fittings for cryogenic cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Definitions
- the present invention relates to a superconducting cable connection structure having a superconducting conductor, and a superconducting cable line having the connection structure.
- the present invention relates to a superconducting cable connection structure that can reduce the pressure change when the pressure in the connection box changes due to an accident such as a short circuit, and can prevent damage to the connection box and the superconducting cable.
- FIG. 3 is a cross-sectional view of a three-core superconducting three-phase superconducting cable.
- the superconducting cable 100 has a configuration in which three cable cores 102 are twisted and accommodated in a heat insulating tube 101.
- the heat insulating pipe 101 has a configuration in which a heat insulating material (not shown) is disposed between a double pipe composed of an outer pipe 101a and an inner pipe 101b, and the inside of the double pipe is evacuated.
- Each cable core 102 includes, in order from the center, a former 200, a superconducting conductor 201, an electrical insulating layer 202, a shield layer 203, and a protective layer 204, and a space 103 surrounded by the inner tube 101b and each cable core 102 forms a coolant flow path.
- connection structure for connecting the superconducting cables is constructed in the middle of the line, and a line end is formed.
- a termination connection structure is established to connect the normal temperature side and the superconducting cable.
- connection structures usually include an end portion of the superconducting cable and a connection box for housing the end portion, and the connection box is filled with a coolant such as liquid nitrogen to cool the end portion. .
- the junction box also has a double tank heat insulation structure like a cable, with a refrigerant tank filled with refrigerant inside and a heat insulation tank outside the refrigerant tank (see Patent Document 1).
- Patent Document 1 JP-A-2000-340274
- connection box or the superconducting cable may be destroyed! / ⁇ ⁇ .
- the superconducting cable is used after being cooled by a refrigerant such as liquid nitrogen as described above.
- a superconducting cable line is usually equipped with a circuit breaker that cuts off the current.
- the current is cut off to reduce heat generation and prevent damage to the cable and junction box.
- the liquid refrigerant may evaporate during this time. It can be destroyed.
- the present inventors have studied the provision of an adjustment valve in a connection box that adjusts the pressure in the connection box when the liquid refrigerant evaporates.
- the regulating valve is placed between the refrigerant tank and the heat insulation tank that make up the connection box, (1) the water around the protruding portion of the insulation valve in the regulating valve freezes to regulate the pressure.
- Connection work may be impaired, (3) Heat entering the refrigerant tank may increase, (4) Corrosion protection on the outer periphery of the heat insulation tank It was found that there was a problem that it was difficult to provide a layer.
- the regulating valve is cooled by the refrigerant in the refrigerant tank since one end is disposed in the refrigerant tank and the other end is disposed so as to protrude from the heat insulating tank. Therefore, when the water vapor in the atmosphere comes into contact with the other end of the regulating valve protruding from the junction box (insulating tank), it becomes water droplets and freezes, or the junction box is placed in a submerged place in the manhole. In such a case, if the moisture that contacts the other end of the regulating valve freezes, the pressure regulating function may not be sufficiently performed.
- connection structure When constructing the connection structure, usually, the refrigerant tank and the heat insulation tank are separately shifted in order to facilitate the connection between the superconducting cables and the connection work between the cable and the room temperature side. Do. However, when the adjustment valve is arranged, the refrigerant tank and the heat insulation tank are connected at the position where the adjustment valve is arranged, so that they cannot be shifted, and as a result the assembly workability is deteriorated or the connection structure becomes large. Problems arise.
- connection box it is necessary to connect the refrigerant tank and the heat insulation tank to a place where the regulating valve is disposed by a metal tube or the like having good heat conductivity. Then, there is a possibility that the penetration heat of atmospheric power may be increased by the metal tube.
- connection box is generally provided with an anticorrosion layer on the outer periphery of the box in order to further enhance the anticorrosion property formed by a material such as stainless steel having excellent anticorrosion properties and strength.
- a material such as stainless steel having excellent anticorrosion properties and strength.
- a main object of the present invention is to provide a superconducting cable connection structure that can more reliably prevent the superconducting cable and the junction box from being broken even when an accident such as a short circuit occurs. It is in.
- Another object of the present invention is to provide a superconducting cable line having the above connection structure.
- the present invention achieves the above object by disposing a member capable of adjusting the pressure in the connection box in the connection box.
- connection structure of the superconducting cable of the present invention includes a connection box in which an end of a superconducting cable having a superconducting conductor is housed, and a coolant filled in the connection box to cool the end. And a pressure adjusting unit disposed in the connection box and capable of adjusting a pressure by deforming following a pressure change in the connection box.
- the present invention provides a method of contacting the outside of the connection box (such as the atmosphere) without providing a pressure adjusting mechanism between the inner tank (refrigerant tank) and the outer tank (vacuum insulation tank) constituting the connection box.
- a pressure adjustment mechanism should be placed inside the junction box, especially inside the inner tank, to prevent damage.
- the present invention having the above configuration can adjust the pressure in the connection box when an accident such as a short circuit occurs, thereby preventing the superconducting cable or the connection box from being broken due to an increase in pressure. It has an excellent effect that it can be performed.
- the pressure adjusting portion is arranged in the connection box and no protruding portion is provided outside the box, it is possible to maintain a sufficient adjusting function and to prevent heat invasion by external force that is not enough. It also has the following advantages when it is possible to achieve excellent assembling workability and to easily form the anticorrosion layer.
- FIG. 1 is a schematic configuration diagram showing a connection structure of a superconducting cable of the present invention, showing an intermediate connection.
- FIG. 2 is a schematic configuration diagram showing a connection structure of the superconducting cable of the present invention, showing a branch portion at the end connection.
- FIG. 3 is a sectional view of a three-core superconducting three-phase superconducting cable.
- the present invention is directed to a superconducting cable having a superconducting conductor. It may be a single-phase superconducting cable having a single cable core having a superconducting conductor, or a multiphase superconducting cable having a plurality of cores. In the case of multi-phase, for example, a three-core bundled three-phase superconducting cable in which three cable cores are twisted and housed in a heat insulating tube is exemplified.
- the superconducting conductor may be, for example, a single layer or a multilayer formed by spirally winding a wire made of a Bi2223-based superconducting material.
- an interlayer insulating layer may be provided.
- the interlayer insulating layer may be formed by winding insulating paper such as kraft paper or semi-synthetic insulating paper such as PPLP (registered trademark, manufactured by Sumitomo Electric Industries, Ltd.).
- the outer periphery of the superconducting conductor is provided with an electric insulating layer formed by winding a semi-synthetic insulating paper such as PPLP (registered trademark).
- the outer periphery of the electric insulating layer may include a shield layer configured in the same manner as the superconducting conductor.
- connection of the superconducting cable includes an intermediate connection for connecting the superconducting conductors in a pair of cables and a terminal connection for connecting the superconducting conductor to the room temperature side.
- the present invention can be applied to any connection.
- the end of the superconducting cable is stored in the connection box.
- the conductor connection part connecting the superconducting conductors at the end of the cable be housed in the intermediate connection box.
- the conductor connections of each phase may be housed in separate intermediate junction boxes, or one intermediate junction box may house conductor connections of all phases! / ⁇ .
- connection When the intermediate connection is performed separately for each phase, the connection is branched and connected for each phase, so the junction box that stores the branch and the intermediate that stores the connection between the superconducting conductors are used as connection boxes.
- a junction box should be provided.
- termination connection in the case of a single-phase cable, the termination connection part that connects the superconducting conductor to the room temperature side should be housed in the termination connection box.
- a junction box for storing the branch part and a terminal connection part for the room temperature side are stored as connection boxes.
- a termination junction box is provided.
- a branch box is also included.
- the specific configuration of the conductor connection portion is composed of the superconducting conductor exposed from the ends of the pair of superconducting cables and the conductive material connecting the pair of superconducting conductors.
- the connecting member may be a sleeve portion into which a pair of superconducting conductors are inserted, or may be configured to include an intermediate connecting member and a sleeve portion connecting the superconducting conductors via the intermediate connecting member. ⁇ .
- a solid insulating member such as an epoxy unit on the outer periphery of the conductor connection portion, or to provide a reinforcing layer with an insulating material such as kraft paper or PPLP (registered trademark) for insulation reinforcement.
- an insulating material such as kraft paper or PPLP (registered trademark) for insulation reinforcement.
- the terminal connection it may be formed by a superconducting conductor exposed from the end of the superconducting cable, and a lead made of a normal conducting material connecting the conductor and the room temperature side.
- the junction box is filled with a refrigerant for cooling the end portion of the superconducting cable, and is capable of maintaining a very low temperature state.
- a refrigerant tank filled with the refrigerant and a heat insulating tank arranged on the outer periphery of the refrigerant tank have a double structural strength.
- the refrigerant it is preferable to use the same refrigerant as that used for cooling the cable portion, such as liquid nitrogen.
- the heat insulating tank is preferably provided with a heat insulating function by performing evacuation or the like. Further, a heat insulating material may be provided.
- Such a connection box is preferably formed of a metal such as stainless steel having high durability. Further, it is preferable that the connection box be cylindrical, because turbulence of the pressurized refrigerant in the box can be suppressed.
- connection box is formed integrally by combining divided pieces divided in the longitudinal direction of the cable.
- connection work is easily performed even in a place where the installation space is limited, such as a manhole.
- a connection box consisting of a pair of half-split pieces that are bisected in the longitudinal direction of the cable, one end of the cable to be connected is located at the root side (the side away from the connection end). One half of the core is released, and another half is released at the base of the other core. Then, since the connection ends of both cable cores to be connected are exposed, the connection work can be easily performed. After connecting the superconducting conductor, it is preferable to move the two halved pieces that have escaped to the connection end side and connect them by welding or the like to form an integral connection box.
- connection structure can be downsized, the installation space is small, and it can be sufficiently installed in a manhole or the like.
- the connection structure can be downsized, the installation space is small, and it can be sufficiently installed in a manhole or the like.
- intermediate junction boxes for each phase, the same work is repeated many times, so the assembly workability is poor.However, when storing in one junction box, only one operation is required, so work efficiency should be improved. Can be.
- connection box is provided with a pressure adjusting portion capable of adjusting the pressure in the connection box by deforming following the change in the pressure in the box.
- the pressure adjusting section be capable of reducing a sudden change in pressure when the liquid refrigerant in the box is vaporized due to a short circuit accident or the like.
- a pressure adjusting section for example, there is a structure in which a housing that expands and contracts at least according to a change in pressure is provided, and a gas that does not flow at a refrigerant temperature filled in the connection box is sealed in the housing. .
- the housing is preferably formed of a coolant filled in the connection box, for example, a material having excellent strength even at an extremely low temperature such as liquid nitrogen, for example, a metal such as stainless steel.
- a bellows tube may be used as the extendable shape.
- the liquid refrigerant in the connection box is vaporized as described above, the pressure in the box rises sharply, and it is desired to instantaneously reduce this pressure change. Therefore, a housing capable of instantaneously contracting is preferable so that the pressure change can be reduced in a very short time.
- the amount of pressure relief can be changed by appropriately changing the thickness, length, height of unevenness, and the like.
- the arrangement direction of the housing may be devised. For example, when adjusting the pressure for an accident at a cable section farther from the junction box, arrange the casing in the junction box so that the direction of expansion and contraction of the casing is equal to the longitudinal direction of the superconducting cable. It is mentioned. When an accident such as a tangent occurs in the cable portion, the temperature increases from the accident portion in the longitudinal direction of the cable, that is, in the direction of current flow. Therefore, when the direction of expansion and contraction of the housing is set to the longitudinal direction of the cable, that is, the direction of energization, it becomes easy to cope with pressure changes.
- connection box When adjusting the pressure in the event of an accident inside the connection box, it is necessary to arrange the case inside the connection box so that the direction of expansion and contraction of the case is equal to the radial direction of the superconducting cable.
- the connection between the superconducting conductors housed in the connection box ⁇ If an accident such as a tangent occurs at the connection between the superconducting conductor and the room temperature side, the temperature rises from the accident in the radial direction of the cable. Is Therefore, the direction of The radial direction makes it easier to respond to pressure changes.
- the gas sealed in the housing include helium and hydrogen. When filling such gas, keep the same pressure as the pressure in the junction box.
- FIG. 1 is a schematic configuration diagram showing a connection structure of a superconducting cable of the present invention.
- the connection structure shown in this example is an intermediate connection structure of a multiphase superconducting cable having a plurality of cable cores 102 having superconducting conductors.
- This connection structure includes an intermediate connection box 10 in which the end of the superconducting cable 100 is stored, a refrigerant 120 filled in the box 10 to cool the end, And a pressure adjusting unit 1 capable of adjusting the pressure of the pressure.
- a pressure adjusting unit 1 capable of adjusting the pressure of the pressure.
- a three-core type three-phase superconducting cable 100 having three cable cores 102 is shown.
- Fig. 1 only two are shown because they are viewed from the side, but three are provided when viewed from the plane.
- Superconducting cable 100 has the same configuration as that shown in FIG. In other words, the central force is such that three cable cores 102 each having a former, a superconducting conductor, an electric insulating layer, a shield layer, and a protective layer are sequentially twisted and housed in a heat insulating pipe.
- the former a plurality of twisted copper wires coated with insulation were used.
- the superconducting conductor and the shielding layer were formed by spirally winding a Bi2223-based superconducting tape wire (Ag-Mn sheathed wire) around the former and the outer periphery of the electrical insulating layer.
- the electric insulating layer was formed by winding semi-synthetic insulating paper (PPLP: registered trademark, manufactured by Sumitomo Electric Industries, Ltd.) around the superconducting conductor.
- the protective layer was formed by winding kraft paper around the outer periphery of the shield layer.
- the insulation tube used was a SUS corrugated tube, and a vacuum multilayer insulation structure in which a plurality of insulation materials were arranged between the outer tube and the inner tube and vacuum was drawn.
- a refrigerant such as liquid nitrogen is circulated between the inner tube and each cable core 102.
- a protective layer made of polyvinyl chloride is provided on the outer circumference of the heat insulating pipe.
- the end of the superconducting cable 100 is introduced into the intermediate connection box 10 and connected thereto.
- three conductor connection portions for connecting the superconductors 201 of the cable core 102 of each phase drawn from the pair of three-phase superconducting cables 100 are housed in one intermediate connection box 10.
- the intermediate connection box 10 has a double structure including a refrigerant tank 11 filled with the refrigerant 120 and storing the end of the cable (conductor connection part), and an insulating tank 12 storing the refrigerant tank 11. is there.
- the refrigerant tank 11 and the heat insulating tank 12 used had a configuration in which a half-split piece of the cable core 102 that could be divided in the longitudinal direction was combined and integrated.
- the size of the manhole is generally about 5-6 m in length, 5-6 m in depth and 2 m in height, and the junction box 10 is about 4 m in length. For this reason, if the junction box is made into an integral structure that cannot be divided, it is difficult to introduce it into the manhole, and it is difficult to perform connection work inside the manhole.
- the conductor connection portion is disposed near the center of the connection box. If the integral connection box is escaped to the root side of one of the cables 100 to perform the connection operation of the superconducting conductor, The conductor connection part is formed on the side opposite to the side where the slack box was released just because it is necessary to make a large allowance, so if the box is moved to the conductor connection part side after connection work, the conductor connection part will be There is a risk that the box will be placed on one side (the side where the connection work was performed).
- the half-split pieces can be about 2 m, so that the escape allowance can be easily introduced into the manhole. Can also be reduced.
- the conductor connection portion can be easily arranged near the center of the intermediate connection box 10 after the formation of the conductor connection portion.
- the intermediate connection box 10 of the present example was formed in a cylindrical shape in order to suppress a pressure loss due to the flow of the pressurized refrigerant.
- the refrigerant tank 11 is filled with a liquid refrigerant such as liquid nitrogen for cooling the conductor connection part.
- the refrigerant tank 11 was formed of stainless steel.
- Each half-split piece constituting the refrigerant tank 11 includes a tubular member 11A having both ends opened, and an end face plate 11B attached to one end of the tubular member 11A.
- a closed space as shown in FIG. 1 is formed by attaching the end face plate 11B to the other end and connecting the open ends of the cylindrical member 11A to each other.
- the connection of the cylindrical member 11A is performed by welding or the like.
- the heat insulating tank 12 accommodates the refrigerant tank 11.
- the heat insulating tank 12 was formed of stainless steel. Further, in this example, heat insulation is performed by evacuating the space between the refrigerant tank 11 and the heat insulation tank 12.
- Each half-split piece constituting the heat insulating tank 12 includes a cylindrical member 12A having both ends opened, and an end plate 12B attached to one end of the cylindrical member 12A, and is provided at one end of the cylindrical member 12A.
- the closed space as shown in FIG. 1 is formed by attaching the end face plate 12B and connecting the other open ends of the cylindrical member 12A.
- the connection between the cylindrical members 12A is performed by welding or the like.
- a ring-shaped member 12c is arranged on the inner peripheral surface of the cylindrical member 12A so that the cylindrical members 12A can be easily connected to each other.
- a support jig 12a for supporting the weight of the refrigerant tank 11 and a fixture 12b for fixing the longitudinal position of the refrigerant tank 11 in the heat insulation tank 12 are arranged in the heat insulation tank 12.
- the support jig 12a has an arc shape along the outer periphery of the tubular member 11A of the refrigerant tank 11 and the inner periphery of the tubular member 12A of the heat insulating tank 12, and is formed of stainless steel having excellent strength.
- the fixture 12b has a ring shape large enough to be in contact with the end face plate 11B of the refrigerant tank 11, and is formed of FRP that is difficult to conduct heat.
- the present invention includes the pressure adjusting section 1 in the refrigerant tank 11.
- the pressure adjusting unit 1 does not liquefy at the temperature of the housing 2 that can expand and contract with the pressure change in the refrigerant tank 11 and the refrigerant 120 that is sealed in the housing 2 and filled in the refrigerant tank 11. It is a configuration including gas 3.
- the casing 2 used a stainless steel bellows tube. It is advisable to use a bellows tube whose thickness, size of irregularities, and length of the tube are adjusted so that it can be contracted (deformed) by a pressure change that occurs in a very short time. That is, the shrinkage allowance of the bellows tube becomes the pressure adjustable range.
- a stainless steel plate was attached to each opening of the bellows pipe by welding, so that the gas 3 could be enclosed.
- One of the plate members is provided with a supply port 2a for introducing the gas 3 and a fixing portion 2b for fixing in the refrigerant tank 11.
- the refrigerant tank 11 is provided with a mounting portion 11a for mounting the fixing portion 2b, and the pressure adjusting portion 1 is fixed in the refrigerant tank 11 by fastening the fixing portion 2b with a fastener such as a bolt.
- the housing 2 is attached so that the direction of expansion and contraction of the housing 2 (the direction indicated by the arrow in FIG. 1) is equal to the longitudinal direction of the superconducting cable (the left-right direction in FIG. 1).
- Gas 3 used was a hermetic gas.
- the pressure in the housing 2 is adjusted so as to be equal to the pressure of the refrigerant 120, and the case 3 is sealed.
- the pressure adjusting section 1 contracts. As a result, the rise can be reduced, and the pressure in the box 10 can be reduced. Therefore, it is possible to effectively prevent the superconducting cable and the intermediate connection box 10 from being destroyed due to the increase in the pressure.
- the pressure adjusting section 1 since the pressure adjusting section 1 is arranged in the intermediate connection box 10 and does not protrude from the box 10, it is possible to sufficiently maintain the pressure adjusting function as compared with the configuration in which the pressure adjusting section 1 is protruded.
- the present invention also has the effects of improving the workability of assembly, improving the workability of the assembly, increasing the heat intrusion from the outside even if the pressure adjusting section is provided, and easily providing the anticorrosion layer on the outer periphery of the box.
- the superconducting cable 100 is housed in a heat-insulated pipe in a twisted state, and at the end introduced into the intermediate connection box 10, the cable cores 102 are separated from each other so that they can be easily handled.
- the base side force is also spread toward the connection end side and is branched and stored in the box 10.
- the first holder 110a is located at the base
- the third holder 110c is located at the connection end
- the second holder 110c is located at the middle.
- the holder 110b is arranged.
- a semicircular member (not shown) is arranged between the first holding tool 110a and the second holding tool 110b to hold the cable core 102 and connect the two holding tools 110a and 110b.
- the third holder 110c is not connected to the other holders 110a and 110b.
- the first holder 110a has an annular portion at the center, and three semicircular members are fixed to the outer periphery of the annular portion.
- the center of the annular portion is substantially at the center of the space surrounded by the three cable cores 102. Are arranged between the cores 102 so that the distance between the cores 102 is maintained.
- the basic configuration of the second holder 110b and the third holder 110c is substantially the same as that of the first holder 110a, except that the diameter of the annular portion is larger than that of the first holder 110a. .
- these holders 110a-110c A sliding portion is provided so as to make almost point contact with the inner peripheral surface of the box 10 so that the inside of the connection box 10 can be moved with expansion and contraction.
- the sliding portion is attached to a place where the semicircular member is not fixed on the outer periphery of the annular portion.
- the holder may be fixed in the power box 10 which is configured to be movable in the intermediate connection box 10.
- the solid insulating members 20 are arranged on the outer periphery of each conductor connecting portion, and these solid insulating members 20 are fixed to the connection box 10 via the metal flange 30.
- the conductor connection portion includes an end portion of the superconducting conductor 201 exposed from the cable core 102 of each phase, an intermediate connection member 40 disposed between these ends and connecting the two, and an end connection between the end portion of the conductor 201 and the intermediate connection member. And a sleeve portion 41 for connecting the member 40.
- the intermediate connection member 40 and the sleeve portion 41 were formed of a conductive material having excellent strength even at the temperature of the refrigerant 120 such as copper or aluminum.
- a force indicating a conductor connection portion only in the lower cable core 102 is the same as in the other two cable cores.
- a solid insulating member 20 made of epoxy resin is arranged on the outer periphery of the intermediate connecting member 40.
- the solid insulating member 20 is integrally formed with a ring-shaped projection 21 in the circumferential direction so as to be easily fixed to the metal flange 30, and is fixed to the flange 30 by a fixing bracket 32.
- a reinforcing layer 22 for reinforcing insulation is provided on the outer periphery of the conductor connection portion as shown in FIG.
- the reinforcing layer 22 was formed by winding kraft paper.
- the solid insulating member 20 is fixed to the connection box 10 (the refrigerant tank 11) via the metal flange 30.
- the metal flange 30 has a disk shape that matches the shape of the connection box (refrigerant tank 11), and is fixed to the refrigerant tank 11 by welding.
- This metal flange 30 is provided with three fixing holes in the plane part, the solid insulating member 20 is inserted into each fixing hole, the protrusion 21 is pressed by the holding flange 31, and the solid metal is fixed to the flange 30 by the fixing bracket 32.
- the insulating member 20 is fixed.
- the metal flange 30 may be provided with a coolant circulation hole so that the coolant 120 can be circulated.
- the metal flange 30 and the holding flange 31 were formed of stainless steel (SUS304) having excellent strength.
- SUS304 stainless steel
- the shield layers of the cable cores 102 pulled out from the respective superconducting cables 100 are connected to each other at the shield connection portion 50 to be short-circuited. With this configuration, a leakage magnetic field is hardly generated outside each cable core 100.
- the shield connection portion 50 shown in this example has a configuration in which a cylindrical member 51 arranged on the outer periphery of the shield layer of the cable core and a connecting member 52 for connecting the cylindrical members 51 to each other.
- the shield connection part 50 was formed of copper.
- the connecting member 52 is made of a flexible braided material, and can easily connect the cylindrical member 51 and the connecting member 52 even in a limited space such as the intermediate connection box 10. At the same time, it is possible to absorb the dimensional deviation generated during the assembling work.
- the shield layer 203 and the cylindrical member 51 were connected with low melting point solder. Specifically, solder having a melting point of about 78 ° C. (chemical components; Sn: 17% by mass, 87% by mass, In: 26% by mass) was used.
- a superconducting material using a normal conducting material may be used as the material of the shield connection portion.
- the cylindrical member may be made of the above-mentioned copper, and the connecting member may be a superconducting material.
- a plurality of round wires formed by a nod-in-tube method may be prepared, and the cylindrical members may be connected by the round wires.
- the shield connection portion is provided at one place in the connection box 10, but it may be provided at two positions, one at each cable side, or the shield connection portion is not provided. May be configured
- the shield connection portion it is preferable to provide a shield connection portion for connecting the shield layer of one cable and the shield layer of the other cable.
- the shielded connection extends from the shield layer of one of the cables, where copper braid is preferred, to the reinforcing layer 22 and
- the cable may be disposed over the shield layer of the other cable via the solid insulating member 20 and connected to each shield layer by a solder.
- the shield connection portion may be made of a normal conductive material or a superconductive material.
- FIG. 2 is a schematic configuration diagram showing a connection structure of the superconducting cable of the present invention, and shows a branch portion in a terminal connection.
- the basic structure of this connection structure is the same as that of the first embodiment, except that the connection box is a branch box 60 that holds each phase of the superconducting cable 100 in an expanded state. That is, the connection structure includes a branch box 60 in which the branch portion of the superconducting cable 100 is stored, a refrigerant 120 that is filled in the box 60 and cools the branch portion, It has a pressure adjustment unit 1 that can adjust the pressure by deforming according to the pressure change of the pressure.
- the branch box 60 has a double structure including a refrigerant tank and a heat insulating tank, similarly to the intermediate connection box 10, and evacuates the refrigerant tank and the heat insulating tank.
- the superconducting cable 100 introduced into the box 60 is held by the holder with the cable cores 102 being spread.
- the holding tool includes a first holding tool 110a at the base side, a second holding tool 110b at the connection end side, and a first holding tool 110a and a second holding tool 110b along the longitudinal direction (the left-right direction in FIG. 2) of the cable core 102.
- a semicircular member 110d is arranged between them.
- the shield layer is treated at the shield connection part 50 as in the first embodiment.
- Insulated pipes 70 made of a double stainless steel corrugate are arranged around the outer periphery of each cable core 102 drawn from the branch box 60, and the pipe 70 is filled with the refrigerant 120.
- An end of each cable core 120 is provided with a terminal 71 that can be connected to a connection device or the like.
- the pressure adjuster 1 is arranged in the branch box 60, but is arranged in the terminal box. May be.
- the housing 2 is attached to the branch box 60 so that the direction of expansion and contraction of the pressure adjusting unit 1 (the direction indicated by the arrow in FIG. 2) is equal to the radial direction of the cable.
- the cable may be arranged so as to be equal to the longitudinal direction of the cable.
- connection structure of the present invention is suitable for establishing an intermediate connection or a terminal connection of a superconducting cable. Further, it is suitable for constructing a superconducting cable line having such a connection structure.
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Cable Accessories (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP05719220A EP1734631A1 (en) | 2004-03-04 | 2005-02-17 | Splice structure of superconducting cable |
CA002558558A CA2558558A1 (en) | 2004-03-04 | 2005-02-17 | Connection structure of superconducting cable |
US10/591,000 US20070169957A1 (en) | 2004-03-04 | 2005-02-17 | Splice structure of superconducting cable |
NO20064471A NO20064471L (no) | 2004-03-04 | 2006-10-03 | Skjotestruktur for superlederkabel |
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JP2004060757A JP2005253203A (ja) | 2004-03-04 | 2004-03-04 | 超電導ケーブルの接続構造 |
JP2004-060757 | 2004-03-04 |
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WO2005086307A1 true WO2005086307A1 (ja) | 2005-09-15 |
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PCT/JP2005/002418 WO2005086307A1 (ja) | 2004-03-04 | 2005-02-17 | 超電導ケーブルの接続構造 |
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US (1) | US20070169957A1 (ja) |
EP (1) | EP1734631A1 (ja) |
JP (1) | JP2005253203A (ja) |
KR (1) | KR20060124741A (ja) |
CN (1) | CN1943088A (ja) |
CA (1) | CA2558558A1 (ja) |
NO (1) | NO20064471L (ja) |
RU (1) | RU2006134613A (ja) |
TW (1) | TW200603510A (ja) |
WO (1) | WO2005086307A1 (ja) |
Families Citing this family (9)
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JP4761218B2 (ja) * | 2007-03-12 | 2011-08-31 | 住友電気工業株式会社 | 締結構造 |
GB201013960D0 (en) * | 2010-08-20 | 2010-10-06 | Advanced Sensors Ltd | Expandable enclosure for oil-in-water analysers |
KR101798659B1 (ko) * | 2011-04-27 | 2017-11-16 | 엘에스전선 주식회사 | 초전도 케이블 장치 |
US8970114B2 (en) * | 2013-02-01 | 2015-03-03 | Lam Research Corporation | Temperature controlled window of a plasma processing chamber component |
US20160170675A1 (en) * | 2013-07-30 | 2016-06-16 | SMART Storage Systems, Inc. | Superconducting Fiber and Efficient Cryogenic Cooling |
US20210313087A1 (en) * | 2014-12-19 | 2021-10-07 | The Texas A&M University System | Methods and compositions for fabrication of superconducting wire |
US11721462B2 (en) * | 2017-01-26 | 2023-08-08 | The Florida State University Research Foundation, Inc. | High temperature superconductor (HTS) cables and method of manufacture |
CN110752575B (zh) * | 2019-09-05 | 2020-12-01 | 国网江苏省电力有限公司电力科学研究院 | 一种三相同轴超导电缆应力锥 |
CN114242334B (zh) * | 2021-12-16 | 2024-05-24 | 深圳供电局有限公司 | 一种三相同轴超导交流电缆的中间接头 |
Citations (2)
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---|---|---|---|---|
JPH0955127A (ja) * | 1995-08-11 | 1997-02-25 | Fujikura Ltd | 超電導電力ケーブル |
JP2002534052A (ja) * | 1998-12-24 | 2002-10-08 | ピレリー・カビ・エ・システミ・ソチエタ・ペル・アツィオーニ | 超電導体を用いる送電システム |
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DE69021966T2 (de) * | 1989-07-10 | 1996-04-18 | Hitachi Ltd | In Isolierflüssigkeit getauchte elektrische Maschine. |
JP3932963B2 (ja) * | 2002-04-17 | 2007-06-20 | トヨタ自動車株式会社 | 蒸発燃料処理装置 |
JP4207223B2 (ja) * | 2003-06-19 | 2009-01-14 | 住友電気工業株式会社 | 超電導ケーブル及びこの超電導ケーブルを用いた超電導ケーブル線路 |
-
2004
- 2004-03-04 JP JP2004060757A patent/JP2005253203A/ja active Pending
-
2005
- 2005-02-17 US US10/591,000 patent/US20070169957A1/en not_active Abandoned
- 2005-02-17 WO PCT/JP2005/002418 patent/WO2005086307A1/ja active Application Filing
- 2005-02-17 KR KR1020067017870A patent/KR20060124741A/ko not_active Application Discontinuation
- 2005-02-17 RU RU2006134613/09A patent/RU2006134613A/ru not_active Application Discontinuation
- 2005-02-17 CN CNA2005800118125A patent/CN1943088A/zh active Pending
- 2005-02-17 EP EP05719220A patent/EP1734631A1/en not_active Withdrawn
- 2005-02-17 CA CA002558558A patent/CA2558558A1/en not_active Abandoned
- 2005-03-01 TW TW094105996A patent/TW200603510A/zh unknown
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2006
- 2006-10-03 NO NO20064471A patent/NO20064471L/no not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0955127A (ja) * | 1995-08-11 | 1997-02-25 | Fujikura Ltd | 超電導電力ケーブル |
JP2002534052A (ja) * | 1998-12-24 | 2002-10-08 | ピレリー・カビ・エ・システミ・ソチエタ・ペル・アツィオーニ | 超電導体を用いる送電システム |
Also Published As
Publication number | Publication date |
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US20070169957A1 (en) | 2007-07-26 |
TW200603510A (en) | 2006-01-16 |
NO20064471L (no) | 2006-10-03 |
JP2005253203A (ja) | 2005-09-15 |
CA2558558A1 (en) | 2005-09-15 |
RU2006134613A (ru) | 2008-04-10 |
EP1734631A1 (en) | 2006-12-20 |
CN1943088A (zh) | 2007-04-04 |
KR20060124741A (ko) | 2006-12-05 |
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