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1. 发明专利

JPH1048105A SAMPLE CONTAINER FOR GAS ANALYSIS 失效
公开(公告)号：JPH1048105A
公开(公告)日：1998-02-20
申请号：JP21657696
申请日：1996-07-30
申请人： FUJIKURA LTD
发明人： SUGAWARA JUN , MAEDA TAKASHI , SUGIYAMA SHUICHI , UTSUNOMIYA SAERI
IPC分类号： G01N1/22 , G01N30/04 , G01N30/12
摘要： PROBLEM TO BE SOLVED: To enable adaptation to the analysis of large samples as well by a method wherein a seal member is interposed on a joint surface between a lid body and an opening part of the body of a container to mount an elastic cock airtightly at a gas sampling port and a substitution gas supply port is provided to interpose a seal member on an inner circumferential surface across the outer circumference in the axis of an opening/closing cock and a branch path of a protruded path part. SOLUTION: A seal member 3 is interposed on a joint surface between a lid body 2 and an opening part 1a of a container body 1 and it employs an O-ring or the like. A gas sampling port 5 is provided at a part of the lid body 2 and an elastic cock 6 is mounted airtight on the gas sampling port 5. The cock employs an elastic material such as rubber. A substitution gas supply port 8 comprises a branch path branched off the course of a protruded path part 7. Seal members 10a and 10b are interposed on an inner circumferential surface at two points across the outer circumference in the axis 9a of an opening/closing cock 9 and the branch path of the protruded path part 7 and they employ O-rings. A sample S is left alone for a specified time being sealed or heated. Then, a gas tight syringe 102 is inserted into the elastic cock 6 of the gas sampling port 5 to analyze a gas.

2. 发明专利

JPH09281015A MEASURING METHOD FOR DISSOLVED OXYGEN IN INSULATOR 失效
公开(公告)号：JPH09281015A
公开(公告)日：1997-10-31
申请号：JP8978296
申请日：1996-04-11
申请人： FUJIKURA LTD
发明人： UTSUNOMIYA SAERI , SUGIYAMA SHUICHI , SUGAWARA JUN
IPC分类号： G01N1/22 , G01N30/04 , G01N30/12
摘要： PROBLEM TO BE SOLVED: To obtain a method in which the amount of oxygen dissolved in an insulator at a cross-linked polyolefin insulated cable can be measured simply with a short-time operation, surely and without dispersion. SOLUTION: A sample S is put into a measuring container 10 in which an inert-gas introduction port 21 comprising a screw stopper 25 and an inert-gas- discharge-port and gas-sampling part 24 sealed with a rubber stopper 23 are formed. The air inside the container is substituted for an inert gas. The measuring container 10 is kept at a standstill for a definite time at a constant temperature. A needle is pierced into the rubber stopper 23, a gas is sampled, and the concentration of oxygen in the sampled gas is measured.

3. 发明专利

JP2000321317A PARTIAL DISCHARGE DETECTING METHOD FOR POWER CABLE LINE 失效
公开(公告)号：JP2000321317A
公开(公告)日：2000-11-24
申请号：JP12781299
申请日：1999-05-07
申请人： FUJIKURA LTD
发明人： MABUCHI TOSHIAKI , TAKAHASHI SUSUMU , SUGAWARA JUN
IPC分类号： G01R31/12 , G01N21/35 , G01N21/3563 , G01N27/62 , G01N30/88
摘要： PROBLEM TO BE SOLVED: To specify generation of partial discharge on a power cable line and the generated part position by detecting acetylene or ethylene contained in the constituting member of the power cable line, and detecting the concentration distribution. SOLUTION: A power cable line is electrified to confirm generation of partial discharge by electrical measurement, and the power cable or the connection part of part position estimated to generate partial discharge is dismembered. Next, samples are picked up from the respective part positions of respective constituting members of the dismembered part. Acetylene or ethylene fused in a small piece is expelled from the small piece and collected. This gas-like acetylene or ethylene is qualitatively and quantitatively analysed by an analyser such as a gas chromatograph, an infrared spectroscopic device, or a mass spectrometer. When acetylene or ethylene is detected by the analysis, it can be confirmed that partial discharge is generated on the part position of the constituting member, and the generated part position is also decided.

4. 发明专利

JPH08203344A CROSSLINKED-POLYETHYLENE-INSULATED CABLE 失效
公开(公告)号：JPH08203344A
公开(公告)日：1996-08-09
申请号：JP1453695
申请日：1995-01-31
申请人： FUJIKURA LTD
发明人： NAKAMURA SHIYOUICHIROU , KANEKO SATOSHI , SUGAWARA JUN
IPC分类号： C08L23/04 , C08L23/00 , H01B3/44 , H01B7/28 , H01B7/282
摘要： PURPOSE: To maintain low the oxygen concentration of a crosslinked- polyethylene insulator during preservation to prevent formation of water during heating by covering the crosslinkedpolyethylene insulator with a metal sheath, and providing a deoxidation layer. CONSTITUTION: A crosslinked-polyethylene insulator 3 is covered with a metal sheath 8, and a deoxidation layer 5 is provided between the insulator 3 and the metal sheath 8. This constitution allows oxygen in the metal sheath 8 to be absorbed into the deoxidation layer 5, and since oxygen outside the metal sheath 8 cannot penetrate through, oxygen in the insulator 3 inside the metal sheath 8 can be maintained at low oxygen concentration even without the cable being preserved in a lean oxygen atmosphere after manufacture. Therefore, formation of water can be prevented even in cases where the cable is heated within the atmosphere after long-range preservation. Desirably, a deoxidizer 1g of which absorbs 10ml or more oxygen is contained in the deoxidation layer 5 by 10g or more per 1m of the cable. Also, the deoxidizer contained in the layer 5 is desirably composed chiefly of iron powders or active iron oxide powders.

5. 发明专利

JP2000333358A DETECTING METHOD FOR PARTIAL DISCHARGE IN POWER CABLE JUNCTION 失效
公开(公告)号：JP2000333358A
公开(公告)日：2000-11-30
申请号：JP13644799
申请日：1999-05-17
申请人： FUJIKURA LTD
发明人： MABUCHI TOSHIAKI , TAKAHASHI SUSUMU , SUGAWARA JUN
IPC分类号： H02G15/28
摘要： PROBLEM TO BE SOLVED: To make it possible to identify any partial discharge occurring in silicone oil and locate the area of occurrence by sampling the silicone oil filled in a prefabricated junction or the like and chemically analyzing octamethyltetracyclosiloxane. SOLUTION: A prefabricated junction is dismantled, and silicone oil present in the boundaries between the members is sampled on an area-by-area basis. The samples are analyzed on an analyzer, such as a gas chromatograph-mass spectrometer and an infrared spectrometer to detect octamethyltetracyclosiloxane in the samples. If octamethyltetracyclosiloxane is detected, it is judged that partial discharge has occurred in the area where the sample was taken, Thus, it is possible to identify any partial discharge occurring in silicone oil in a joint, such as a prefabricated joint, and locate the area of occurrence with reliability.

6. 发明专利

JPH07141918A CROSSLINKED POLYETHYLENE INSULATED CABLE AND ITS TREATMENT METHOD 失效
公开(公告)号：JPH07141918A
公开(公告)日：1995-06-02
申请号：JP29104893
申请日：1993-11-19
申请人： FUJIKURA LTD
发明人： ISHIKAWA IZUMI , GOTO KAZUHIKO , NAKAMURA SHIYOUICHIROU , SUGAWARA JUN , YAMANOUCHI HIROSHI , KANEKO SATOSHI , ITO MASAHIKO , TAN MASAYUKI
IPC分类号： C08J7/00 , H01B3/44 , H01B13/14
摘要： PURPOSE:To restrain the occurrence of water as a result of crosslinking agent dissolved residue in an insulator for a crosslinked polyethylene insulated cable without adding special processes and effectively prevent the characteristic deterioration of the crosslinked polyethylene insulated cable. CONSTITUTION:The concentration of oxygen in an insulator is 0.5vol% or less. Over a period up to actual use immediately after crosslinking is completed, a heating process to heat up to 40 deg.C or higher is therefore performed in an atmosphere of oxygen partial pressure 80mmHg or less.

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