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1. 发明专利

JPH1051940A CONNECTION BOX FOR POWER CABLE 失效
公开(公告)号：JPH1051940A
公开(公告)日：1998-02-20
申请号：JP19907596
申请日：1996-07-29
申请人： HITACHI CABLE
发明人： SAKAMAKI MASATOSHI
IPC分类号： H02G15/06 , H02G15/10
摘要： PROBLEM TO BE SOLVED: To make it possible to restrict the scattering of a material forming a broken portion of a connection box to a minimum due to the inner pressure during dielectric breakdown. SOLUTION: A bore hole 4" is drilled from the inner diameter side of an insulation cylinder 4 made of epoxy resin in the direction to the outer diameter thereby forming the thin-walled portion 41 at the bottom of the bore hole at the outer diameter side where the mechanism strength is lowest, so that the thin-walled portion will be broken first when an inner pressure is applied. Also, the bore hole for the thin-walled portion 41 may be drilled from the outer diameter side in radial direction of the insulation cylinder 4 thereby drilling this hole with the bottom portion located at the inner diameter side. Because of this, the breakage will occur only at a very small portion of the insulation cylinder 4 so that the scattering of this small portion hardly hits pedestrians or nearby existing facilities.

2. 发明专利

JP2001157353A POWER CABLE JOINT 失效
公开(公告)号：JP2001157353A
公开(公告)日：2001-06-08
申请号：JP33000499
申请日：1999-11-19
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： GOTO TAKESHI , SAKAMAKI MASATOSHI , ABE KAZUTOSHI
IPC分类号： H02G15/08 , H02G15/10
摘要： PROBLEM TO BE SOLVED: To provide a power cable joint which can securely restrict the scattering directions of joint components when a grounding phenomenon occurs and protect existing equipment from damages caused by the scattering joint components. SOLUTION: A slit 10 is formed in the outer or inner surface of a joint case at an arbitrary position to restrict the scattering directions of joint components 12 in a joint case 5.

3. 发明专利

JP2001037062A POWER CABLE CONNECTOR 失效
公开(公告)号：JP2001037062A
公开(公告)日：2001-02-09
申请号：JP20404299
申请日：1999-07-19
申请人： HITACHI CABLE
发明人： KAWAKAMI TAKAAKI , TANNO SHIRO , SAKAMAKI MASATOSHI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To fix and release a connector without rotating a connector body by engaging to lock a metal pin to a groove formed of a cylindrical fitment and an embedded conductor. SOLUTION: The power cable connector is provided so as to engage a cylindrical fitment 13 with an inner taper surface with an interior of an embedded conductor 9 in an epoxy unit of a connector unit and to urge a metal pin 12 radially projectably from and retractably in a conductor connecting tube 10 at an outside by a spring 11. In this case, the pin 12 is engaged to be locked to an annular groove 16 formed of the fitment 13 and the conductor 9. Thus, the connector can be fixed and released without rotating a connector body.

4. 发明专利

JP2001016756A POWER CABLE JOINT 失效
公开(公告)号：JP2001016756A
公开(公告)日：2001-01-19
申请号：JP17697199
申请日：1999-06-23
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： GOTO TAKESHI , TANAKA KENICHIRO , MITO MASAHIKO , NUMATA NAOHISA , SAKAMAKI MASATOSHI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To obtain a power cable joint, which can suppress scattering of broken pieces to a minimum, when an insulating cylinder breaks due to the rise of the inner pressure of a joint. SOLUTION: A reinforcing cylinder 6, consisting of two cylinder elements 7 and 7' is buried in an insulating cylinder 4 which is incorporated in order to electrically isolate cable protective metal fittings 2 and adaptor metal fittings 3 from each other. Cut parts 10 are formed at prescribed positions in the circumferential directions of the cylinders 7 and 7'. When the inner pressure of the joint is elevated by insulation breakdown, the cut parts are first broken for reducing the internal pressure. With this constitution, the break of the whole insulating cylinder 4 can be avoided, and scattering of the broken pieces can be suppressed to a minimum.

5. 发明专利

JP2001231146A CONNECTION PART FOR POWER CABLE 失效
公开(公告)号：JP2001231146A
公开(公告)日：2001-08-24
申请号：JP2000041410
申请日：2000-02-15
申请人： HITACHI CABLE
发明人： SAKAMAKI MASATOSHI , HOSHINO TAKAYUKI , NAKAZAWA TAKESHI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a connection part for power cables that prevents power cables from rotating and at the same time falling off, and facilitates disassembly and reassembly. SOLUTION: In a connection part 1 for power cables that compressively connects conductor connection pipes 5 to ends parts 4 of each power cable conductor 3 to connect a plurality of power cables to one power cable, and inserts each conductor connection pipe 5 into each conductor connection pipe insertion part 8 being formed in buried fittings 7 in an insulation unit 6 for connecting the power cables one another, a groove 12 for preventing rotation is formed at the conductor connection pipe insertion parts 8 of the buried fittings 7, and a projection 13 for preventing rotation that is engaged to the groove 12 for preventing rotation is formed in the conductor connection pipes 5 for composing a rotation prevention means 14.

6. 发明专利

JP2001037061A BRANCH CONENCTOR FOR POWER CABLE 失效
公开(公告)号：JP2001037061A
公开(公告)日：2001-02-09
申请号：JP20404399
申请日：1999-07-19
申请人： HITACHI CABLE
发明人： YAMAGUCHI MASAYUKI , TANNO SHIRO , KAWAKAMI TAKAAKI , KOIBUCHI SUMIO , FUJIYOSHI YASUO , SAKAMAKI MASATOSHI
IPC分类号： H01R4/70 , H02B1/20 , H02G15/08
摘要： PROBLEM TO BE SOLVED: To reduce a dielectric loss tangent and to decrease an expansion coefficient by using a globular quartz having a mean particle size of a specific value or less as a filler of a filler-filled epoxy resin used as an insulator of a main insulating unit in a branch connector system-branched from a power cable line. SOLUTION: A CV cable is formed in a prefabricated shape constituted of a premolded insulator and a spring unit as an internal insulator. An OF cable is provided with a reinforcing insulator of insulating paper on an OF cable insulator, an epoxy bellmouth is disposed in a shield for filling an oil. A globular quartz having a mean particle size of 30 μm or less is blended and composed as a filler in an epoxy resin in a main insulator 2' of the unit, and an aluminum is used as an embedded electrode 1' to become a high-voltage conductor. Thus, its dielectric loss tangnt is reduced, and its expansion coefficient can be decreased.

7. 发明专利

JPH10160781A ELECTRODE FOR DETECTION OF PARTIAL DISCHARGE 失效
公开(公告)号：JPH10160781A
公开(公告)日：1998-06-19
申请号：JP32134596
申请日：1996-12-02
申请人： HITACHI CABLE
发明人： TASHIRO TSUTOMU , SAKAMAKI MASATOSHI , KUMAGAI SUSUMU , ENDO TAKESHI
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To make it possible to conduct mounting operation simply and safely in a short time by a method wherein a metal-foil electrode body and a lead wire connected to the body are insulated and covered. SOLUTION: In electrodes 4 for the detection of a partial discharge, metal-foil electrodes 8, 8 and lead wires 5, 5 connected to the electrodes are insulated and covered 10 by a molding operation with cross-linking polyethylene, and a conductive part on the side of a sample is insulated and reinforced so as not to be exposed. Then, the metal electrodes 8 are insulated and covered 10 so as to be brought into close contact with, arranged and installed on, respective corrosion-preventive sheath faces, covering a copper pipe 2, at the copper pipe 2 in connection parts on both sides of an insulating tube 1 in an insulating connection part. The electrodes 4, 4, for the detection of the partial discharge via the insulating tube 1, are connected to a partial- discharge detecting impedance 6 at the lead wires 5, 5, and partial-discharge pulses which are generated from the sample are detected. At this time, since the electrodes 4, 4 for the detection of the partial discharge are insulated and covered 10 integrally, their electrostatic coupling to the sample becomes uniform. When the lead wires 5, 5 for a high voltage are used, the electrodes are safe against a line conductor, a lightning surge or the like, and the mounting operation efficiency of the electrodes is enhanced.

8. 发明专利

JP2001268772A CONNECTION FOR PLASTIC POWER CABLE 失效
公开(公告)号：JP2001268772A
公开(公告)日：2001-09-28
申请号：JP2000079285
申请日：2000-03-16
申请人： HITACHI CABLE
发明人： SAKAMAKI MASATOSHI , NAKAZAWA TAKESHI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a connection for a power cable having stable characteristics, which is capable of reducing deformation in a cable insulator and maintaining precise boundary pressure, by ensuring that the expansion of a pre-molded insulator is likely to escape in the longitudinal direction. SOLUTION: The pre-molded insulator inserted into between an epoxy unit (or porcelain tube) and the cable insulator is pushed in from the rear side by push hardware, and thereby the mated faces of the pre-molded insulator and the epoxy unit and the mated faces of the pre-molded insulator and the cable insulator are pressed against each other and brought into tight contact. In this structure, the flat portion formed on the periphery of the pre-molded insulator is reduced in outside diameter and the flat portion is positively moved away from the epoxy unit, so that a gap can be ensured between the peripheral flat portion of the pre-molded insulator expanded during temperature rise and the inner face of the epoxy unit. Thus, it is not caught in the radial direction and the expansion can escape in the longitudinal direction, that is, in the direction of the axis of the cable. The flat portion, small in outside diameter, preferably comprises steps formed out of the conductive layer of the pre-molded insulator to which no electric field is applied.

9. 发明专利

JP2001177974A THREE-CORE BLANKET TYPE BRANCH CONNECTION 失效
公开(公告)号：JP2001177974A
公开(公告)日：2001-06-29
申请号：JP35267699
申请日：1999-12-13
申请人： HITACHI CABLE
发明人： TANNO SHIRO , YAMAGUCHI MASAYUKI , SAKAMAKI MASATOSHI , FUJIYOSHI YASUO
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a three-core blanket type branch connection which enables large reduction of cost by curtailment of work execution time and installation area, omission of maintenance inspection, etc. SOLUTION: This branch connection uses an epoxy unit where a shield electrode using a current application conductor in combination is buried inside, and this epoxy unit has three places of cable insertion ports reaching the shield electrode, and the shielding electrodes facing these cable insertion ports are provided with conductor connectors, and the terminals of plastic insulated cable, OF cables, or both those cables can be connected to these conductor connectors. It will do to store the epoxy unit in a protective pipe in the shape of an inverted cup, and mount the lower copper pipe attached to the terminal of the plastic insulated cable or the OF cable to the opening side of this protective pipe.

10. 发明专利

JP2000125459A POWER CABLE JOINT 失效
公开(公告)号：JP2000125459A
公开(公告)日：2000-04-28
申请号：JP29362298
申请日：1998-10-15
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： ISHIBASHI ATSUHIKO , NAKADE MASAHIKO , MATSUI TOSHIYA , SAKAMAKI MASATOSHI , KOIBUCHI SUMIO , FUJIYOSHI YASUO , YAMAGUCHI MASAYUKI , NAKAJIMA KENJI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a power cable joint in which a power cable will not turn even if it is an insertion-type intermediate joint part. SOLUTION: Two holes 5a are formed in a conductor connection pipe 5 at two positions deviated from its center. A conductor connection pipe 6, which has two protrusions 6a at two positions deviating from its center, is inserted into the conductor connection pipe 5 so as to have the respective holes 5a and protrusions 6a couple with each other. With this constitution, both the conductor connection pipes 5 and 6 are caught with each other with the holes 5a and the protrusions 6a and respective forces attempting to rotate in the directions opposite to each other are canceled, and the rotation is restrained. Thus, the rotating of a power cable can be suppressed.

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