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1. 发明专利

JP2001008354A DRY AIR TERMINAL CONNECTION PART 失效
公开(公告)号：JP2001008354A
公开(公告)日：2001-01-12
申请号：JP17075199
申请日：1999-06-17
申请人： HITACHI CABLE
发明人： TANNO SHIRO , YAMAGUCHI MASAYUKI , FUJIYOSHI YASUO
IPC分类号： H02B13/02 , H02G5/06 , H02G15/06 , H02G15/20
摘要： PROBLEM TO BE SOLVED: To provide a dry air terminal connection part which adopts insulating structure of a dry tape, without using insulating oil and whose insulating performance is stabilized. SOLUTION: An evaporation pipe 8, through which an insulating gas can be permeated, is installed at the inside of an insulating pipe 5 into which an insulating gas is filled and which is maintained under a positive pressure. Consequently, the insulating gas inside the insulating pipe is always maintained under a positive pressure, and the insulating performance of this dry air terminal connection part is stabilized and ensured. It is preferable to install a plastic permeation plate at the evaporation pipe 8. As a plastic material, polyethylene, nylon, Teflon(R), silicone rubber, EPR or the like are suitable. A liquid, gaseous or solid insulating substance is filled into the evaporation pipe. In this case, when the liquid or solid insulating substance is used, it is made to pass through as a gasified insulating gas.

2. 发明专利

JPH11262159A PREFABRICATED CONNECTOR FOR CV CABLE 失效
公开(公告)号：JPH11262159A
公开(公告)日：1999-09-24
申请号：JP5804998
申请日：1998-03-10
申请人： HITACHI CABLE
发明人： TANNO SHIRO , YAMAGUCHI MASAYUKI
IPC分类号： H02G15/08
摘要： PROBLEM TO BE SOLVED: To change the compressive pressure applied to a premolded insulator, actively following the temperature change of a CV cable, by so providing a clevis and a displacement transferring shaft that their dislacements and expansion and shrinkage of a temperature dependent hydraulic bellows interlock each other, and by linking the displacement transferring shaft to a spring. SOLUTION: When the temperature of a temperature dependent hydraulic bellows 13 is high, expanding itself and deforming a clevis 14 in a Z-shaped form by its expansion force, the displacement thereof is transferred to a displacement transferring shaft 15' to shorten the length of a spring 10. On the other hand, when the temperature of the hydraulic bellows 13 is low, shrinking itself and deforming the clevis 14 in an inverse-Z-shaped form by its shrinkage force, the displacement thereof is transferred to the displacement transferring shaft 15' to lengthen the length of the spring 10. By these operations, changing the length of the spring 10 accompanied by the temperature change of a CV cable (C), the compressive pressure caused by the spring 10 is changed to keep nearly constant the interfacial pressure of a premolded insulator 6.

3. 发明专利

JPH07312812A FORMATION METHOD OF REINFORCEMENT INSULATOR OF CONNECTION PART FOR PLASTIC-INSULATED POWER CABLE 失效
公开(公告)号：JPH07312812A
公开(公告)日：1995-11-28
申请号：JP12473394
申请日：1994-05-16
申请人： HITACHI CABLE
发明人： WATABE YOICHI , FUJIYOSHI YASUO , KOBAYASHI MASAYUKI , YAMAGUCHI MASAYUKI , KATO KOICHI
IPC分类号： H01R43/00 , H02G1/14 , H02G15/08
摘要： PURPOSE:To shorten the working time by a method wherein an insulating synthetic resin is injected into an external conductive unit through a metal mold, the whole is heated so as to be cross-linked, the insulating synthetic resin and the external conductive unit are integrated and a reinforcement insulator is formed. CONSTITUTION:An external conductive unit 8 is constituted of two split members which are symmetrical, it is formed to be a trumpet shape which is matched to the external shape of an is insulating synthetic resin which is injected into its inside so as to be integrated, and it must be preheated to a temperature of about 120 deg.C which is at the same degree as the temperature of the insulating synthetic resin which is injected into the external conductive unit 8 and cable insulators 2, 2' by means of a metal mold 10 having a heating function before the insulating synthetic resin is injected. Then, after the insulating synthetic resin has been injected, the metal mold 10 is set to a covered state, a heater 11 is electrified, the temperature of 120 deg.C is kept, and a cross-linking process is executed. Then, the external conductive unit 8 and an external conductive unit 8' which is provided with an insulating layer are brought into close contact and integrated, and a reinforcement insulator whose insulating performance is excellent can be formed. As a result, the working time can be shortened sharply, and the reliability of a connection part can be enhanced.

4. 发明专利

JPH0759244A PLASTIC INSULATED POWER CABLE JOINT 失效
公开(公告)号：JPH0759244A
公开(公告)日：1995-03-03
申请号：JP19612293
申请日：1993-08-06
申请人： HITACHI CABLE
发明人： KOIBUCHI SUMIO , KOBAYASHI MASAYUKI , YAMAGUCHI MASAYUKI
IPC分类号： H02G15/103 , H02G15/08
摘要： PURPOSE:To retard the generation of corona even upon application of abnormal voltage by covering the outer peripheral surface at the conductor joint of a sleeve with an insulation treatment layer communicated with the terminal of a plastic insulator. CONSTITUTION:An insulation tape is wound around the outer peripheral surface at the conductor joint 2a of a sleeve 2 to form an insulation treatment layer 13 having one end in the layer direction extending from the forward end of the conductor joint 2a and communicating with the right angle cut end face 120 of a plastic insulator 12 while filling a valley having an exposed part of the conductor 11 as the bottom. Preferably, the insulation tape is brought into pressure contact, at the side edge thereof, with the end face 120 of the plastic insulator 12. This structure prevents the generation of corona due to abnormal voltage after long term use and prevents a streak of water from intruding to the outside of the sleeve 2 thus suppressing the damage upon occurrence of failure.

5. 发明专利

JPH05111125A PREMOLDED INSULATOR INSERTION JIG 失效
公开(公告)号：JPH05111125A
公开(公告)日：1993-04-30
申请号：JP29759891
申请日：1991-10-18
申请人： HITACHI CABLE
发明人： YAMAGUCHI MASAYUKI , TANNO SHIRO , TSUBOI ZENKICHI
IPC分类号： H02G1/14 , H02G15/08
摘要： PURPOSE:To prevent bedewing and to conduct a premolded insulator mounting work easily by providing a hydraulic cylinder, fastening metal fittings and pressing metal fittings and by mounting the premolded insulator by means of the hydraulic cylinder with the inside of a cover filled with electric negative gas or dry air after degassing the inside of the cover. CONSTITUTION:An end of a CV cable 12 is peeled at places to expose a cable conductor 15, which is covered with a conductor connection sleeve 16 and is compression-connected. After the inside of a cover 4 is degassed, the atmosphere of the inside of the cover 4 is replaced with SF6 gas, etc., by using a gas filling tube 21. Then, a hydraulic cylinder 10 installed on a fastening metal fitting 7 is driven and a cone-shaped end of a premolded insulator 2 is moved to the right through a pressing metal fitting 3, to be fit in with a tapered face on the inner surface of an epoxy unit 1. After removing an insertion jig, a spring unit 18 is mounted on an end of a protective tube 17 and the spring unit 18 is covered with an end copper pipe 19. A part between the end copper pipe 19 and the CV cable 12 is coated with a waterproof agent 20.

6. 发明专利

JPH0510889B2 失效
公开(公告)号：JPH0510889B2
公开(公告)日：1993-02-12
申请号：JP16280586
申请日：1986-07-10
申请人： HITACHI CABLE
发明人： YAMAGUCHI MASAYUKI , TANNO SHIRO , TSUBOI ZENKICHI
IPC分类号： H02G1/14 , H02G15/00 , H02G15/013

7. 发明专利

JPH0463606B2 失效
公开(公告)号：JPH0463606B2
公开(公告)日：1992-10-12
申请号：JP16425386
申请日：1986-07-11
申请人： HITACHI CABLE
发明人： YAMAGUCHI MASAYUKI , TSUBOI ZENKICHI
IPC分类号： H02G1/14 , H02G15/08

8. 发明专利

JPH03273809A PREFABRICATED JOINT AND PARTIAL DISCHARGE DETECTION METHOD FOR CV CABLE 失效
公开(公告)号：JPH03273809A
公开(公告)日：1991-12-05
申请号：JP7142190
申请日：1990-03-20
申请人： HITACHI CABLE
发明人： SATO YASUO , YAMAGUCHI MASAYUKI , ENDO TAKESHI
IPC分类号： G01R31/04 , H02G15/08 , H02G15/103
摘要： PURPOSE:To detect a partial discharge and evaluate the boundary state of an insulator by a method wherein conductive layers which are separated into a main electrode which is so provided as to cover the most part of a buried electrode in the outer surface of an epoxy unit and grounding electrodes which are provided with certain intervals are formed. CONSTITUTION:A main electrode 10 which is composed of a conductive layer and long enough to cover a buried electrode 4 and a plurality of metallic measuring electrodes 13 on both ends of the main electrode 10 are formed on the outer surface of an epoxy unit 5 beforehand. Grounding electrodes 11 and 11 are formed on the outer circumferences of the ends of the epoxy unit 5 beforehand. A discharge pulse is detected by a discharge pulse measuring instrument 16 through a measuring lead wire 14 and a detection impedance 15.

9. 发明专利

JPH03245714A PREFABRICATED-TYPE CONNECTOR FOR CV CABLE 失效
公开(公告)号：JPH03245714A
公开(公告)日：1991-11-01
申请号：JP4417890
申请日：1990-02-22
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： TANAKA TAKESHI , KATAGAI TERUSHI , YAMAGUCHI MASAYUKI , TANNO SHIRO
IPC分类号： H02G15/08 , H02G1/14
摘要： PURPOSE:To increase a dielectric breakdown strength by impregnating a premold unit with cumyl alcohol. CONSTITUTION:Premold units 5 and 5' which have conical fore ends and are inserted into CV cables 1 and 1' beforehand from the right and the left respectively are fitted in a space formed among cable insulators 1b and 1b' and the tapered face of an epoxy insulator 4. For these premold units 5 and 5', premold units impregnated with cumyl alcohol of a temperature of 60 deg.C for three days are used. On the rear end sides of these premold units 5 and 5', semiconductive parts 5b and 5b' are molded integrally with insulating parts 5a and 5a' respectively and these semiconductive parts 5b and 5b' are connected to semiconductive layers 1c and 1c' of CV cables 1 and 1'. In succession, a protecting trunk tube 6 is provided on the outer periphery of the epoxy insulator 4.

10. 发明专利

JPH03167773A MANUFACTURE OF EXTRUSION MOLDED JOINT FOR CV CABLE 失效
公开(公告)号：JPH03167773A
公开(公告)日：1991-07-19
申请号：JP30660389
申请日：1989-11-28
申请人： HITACHI CABLE
发明人： IKEDA TADAYOSHI , SATO HIDEO , YAMAGUCHI MASAYUKI , ISONO MAKOTO
IPC分类号： H01R43/00
摘要： PURPOSE:To stabilize electric insulating performance by carrying out preheating at a certain specified temp. with a heater for an extrusion die, filling a space between a cable junction and the extrusion die and also the inside of an extruding device with a gas having a large degree of dissolution to polyethylene, and performing the extrusive molding upon attaining the specified temp. CONSTITUTION:The ends of bridged polyethylene (CV) cable 1, 1' are stripped in steps, butted, and connected to each other by a joint tube. An internally semiconductive layer 8 is formed, on its periphery and a cylindrical extrusion die 4 is put over the periphery of this junction part. A space between the junction of CV cables 1, 1' and the extrusion die 4 is filled with a gas 7 having a large degree of dissolution, and polyethylene with bridging agent is extruded into the space via a resin supply pipe 9 when the specified temp. is attained by feeding current to a heater 3 for heating the extrusion die 4. This process can enhance the electric characteristics.

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