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1. 发明专利

JP2002175734A WIND NOISE PREVENTING INSULATOR 失效
公开(公告)号：JP2002175734A
公开(公告)日：2002-06-21
申请号：JP2000370380
申请日：2000-12-05
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： KIKUCHI HITOSHI , KUBOKAWA HIROSHI , KUMOFUJI KATSUYOSHI , NAKAMURA HIROSHI , TACHIBANA AKIRA , IKEDA KOICHI
IPC分类号： H01B17/02 , H02G7/00
摘要： PROBLEM TO BE SOLVED: To provide a wind noise preventing insulator capable of preventing wind noise generated from a large insulator string of an extra high voltage system. SOLUTION: Cavity noise is generated in a groove formed by an outermost circumferential rib of a suspension insulator 1 and a rib in a second row from an outer side and the cavity noise causes the insulator wind noise. When substantially perpendicular wind hits the insulator string where a plurality of such suspension insulators are connected, vortexes are generated at outermost circumferential ribs 2a of each suspension insulator 1, sound waves are generated when the vortexes hit ribs in second rows from outer sides, the sound waves return and hit the upstream side ribs, they become triggers for new vortex generation and form feedback mechanisms, and the so-called cavity noise is generated. To prevent generation of the feedback mechanisms, making turbulent flows in the upstream ribs 2a is effective. Namely, the wind noise can be prevented by providing uneven elastic bodies 31 and 41 in an end rim of the outermost circumferential rib 2a of an earthenware part 2 of the suspension insulator 1.

2. 发明专利

JP2002271960A HEAT DISSIPATION PROMOTING SPIRAL ROD AND OVERHEAD TRANSMISSION LINE USING THE SAME 失效
公开(公告)号：JP2002271960A
公开(公告)日：2002-09-20
申请号：JP2001063461
申请日：2001-03-07
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： OTAKA KAZUYOSHI , KIKUCHI HITOSHI , IWAMA SHIGEMI , ISOZAKI MASANORI
IPC分类号： H01B5/04 , H01B5/08 , H02G1/02 , H02G7/14
摘要： PROBLEM TO BE SOLVED: To provide a novel heat dissipation promoting spiral road wherein the efficiency of heat dissipation from a transmission line is enhanced, and to provide an overhead transmission line using the spiral rod. SOLUTION: The spiral rod 2 that is spirally wound around an overhead transmission line 1 is provided on the surface of the metal rod body 2a with a black coating 2b. Thus, heat dissipation from the overhead transmission line 1 into atmosphere is promoted and the efficiency of heat dissipation from the overhead transmission line 1 is enhanced.

3. 发明专利

JP2002118915A FIXING METHOD FOR SNOW DROP PREVENTION NET 失效
公开(公告)号：JP2002118915A
公开(公告)日：2002-04-19
申请号：JP2000313134
申请日：2000-10-06
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： KIKUCHI HITOSHI , TAKAHASHI TADAHIRO , KITAMURA SATOSHI , ISOZAKI MASANORI
IPC分类号： H02G1/02 , H02G7/16
摘要： PROBLEM TO BE SOLVED: To provide a novel fixing method for snow drop prevention net with which a snow drop prevention net is fixed easily and surely on an overhead linear body. SOLUTION: A snow drop prevention net 3 is placed around an overhead line body 1 ensured with certain intervals 5, and a wire 6 for fixation is spirally wound around the snow drop prevention net 3. Thus the snow drop prevention net 3 is fixed easily and securely on the overhead line body 1, and consequently, labor and time required for installation work is reduced significantly.

4. 发明专利

JP2002313166A METHOD OF RESTRAINING WIND NOISE GENERATED BY INSULATOR 失效
公开(公告)号：JP2002313166A
公开(公告)日：2002-10-25
申请号：JP2001110198
申请日：2001-04-09
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： KUMOFUJI KATSUYOSHI , KIKUCHI HITOSHI , KUBOKAWA HIROSHI , NAKAMURA HIROSHI , TACHIBANA AKIRA , IKEDA KOICHI
IPC分类号： H01B17/00 , H01B17/40
摘要： PROBLEM TO BE SOLVED: To provide a method which restrains wind noise generated by a long series of big insulators and can be applied to existing installations with ease and at low cost. SOLUTION: With the method of restraining wind noise generated by an insulator 1 for an aerial power transmission cable, an earthenware section 2 of the insulator is formed of a plurality of concentric corrugations 4 and a blocking member 9 is arranged to fill the outermost concave portion 8 formed between the corrugation of the outermost periphery 4a and the inner corrugation 4b next to 4a.

5. 发明专利

JPH0487210A ELECTRIC CABLE OF LOW WIND NOISE AND LOW AUDIBLE NOISE (AN) 失效
公开(公告)号：JPH0487210A
公开(公告)日：1992-03-19
申请号：JP20019190
申请日：1990-07-27
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： TAKEBE TOSHIRO , WATANABE MASATO , YAMADA TOSHIO , FUJISHIMA TAKAO , URASAWA KATSUYUKI , OGAWA MASAHIRO , SHIMOJIMA KIYOSHI , KARASHI YUJI , KAWAKAMI TAKASHI , YAMAMOTO KENJI , KIKUCHI HITOSHI , ITO HIROAKI
IPC分类号： H01B5/08
摘要： PURPOSE:To obtain an electric cable excellent in wind noise and AN characteristics by composing the outermost strand layer of thick and thin strands having nearly sectorial sections, forming a groove part at nearly the central position on the surface of each large diametral step and specifying their characteristics and shapes. CONSTITUTION:The outermost strand layer of a stranded wire is composed of thick strands 1 and thin strands 2 both having nearly sectorial sections and smooth step surfaces are spirally formed on the peripheral surface of the stranded wire by the difference between strands 1, 2, and also a groove part 11 is formed at nearly the central position on the surface of each large diametral step. Hereupon, where a center angle being formed with actual surfaces of each surface 10a of the large diametral step is thetae, an uneven level difference is h, an equivalent outside diameter of a surface- smooth electric cable to an ordinary electric cable is de, an outside diameter of the ordinary electric cable is d, a depth of a recess being formed between the strands adjoining each other which form a surface 10b of a small diametral step is delta and an opening width of the recess is t, expressions I to VI are satisfied. In this way, the electric cable of low wind noise and low AN having a constitution for attaining the optimum condition in both low wind noise and AN properties can be obtained.

6. 发明专利

JPH11341686A DISTRIBUTED POWER SYSTEM 失效
公开(公告)号：JPH11341686A
公开(公告)日：1999-12-10
申请号：JP13967198
申请日：1998-05-21
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： OSHIMA MASAAKI , MIYAZAKI SATOSHI , INAGAKI KATSUHISA , KIKUCHI HITOSHI , NIRASAWA HITOSHI
IPC分类号： H02J3/38 , H02M7/12 , H02M7/155
摘要： PROBLEM TO BE SOLVED: To obtain the cut-off performance similar to a case that a semiconductor element having a self arc-distinguishing function is used in a system linkage switch, even when one with no self-arc-distinguishing function is used. SOLUTION: In a distributed power system constituted of a power converter 4 which is connected parallelly with a load connected to a power system 1 through a system linkage switch 3 and is operated in linkage with the power system 1, and a DC power supply 5 which can be charged and discharged and is connected to the DC side of the power converter 4, the system linkage switch 3 is constituted of a semiconductor element having no self arc-distinguishing function. This distributed power system is provided with a means for controlling the current at a linkage point with the power system 1 to a desired value while the system linkage switch 3 is closed, a means for controlling the voltage of the load 2 to a desired value while the system linkage switch 3 is opened, a means for detecting an abnormality in the power system 1 and then instructing the system linkage switch 3 to open, and a means for changing the current of the power converter 4 so as to reduce a value of the current in the system linkage switch 3 when an abnormality is detected in the power system 1.

7. 发明专利

JP2002245880A WIND NOISE PREVENTING INSULATOR 失效
公开(公告)号：JP2002245880A
公开(公告)日：2002-08-30
申请号：JP2001042240
申请日：2001-02-19
申请人： HITACHI CABLE
发明人： SHIMADA NORIYUKI , KIKUCHI HITOSHI
IPC分类号： H01B17/40 , H01B17/02 , H02G1/02 , H02G7/00 , H02G7/14
摘要： PROBLEM TO BE SOLVED: To provide a wind noise preventing insulator that is effective even for a long insulator string and easy to take computer measures for an existing facilities. SOLUTION: In the insulator 10 that has ceramic part 12 which plural ring pleats 21 are formed integrally in concentric circle form at the lower part of a disc 20 made of porcelain, dampers 23 made of insulating elastic body are provided from the bottom end of the pleat 21, that is at the lowest end, to the outer circumference.

8. 发明专利

JP2002116359A COMPOSITE FIBER OPTIC OVERHEAD GROUND WIRE 失效
公开(公告)号：JP2002116359A
公开(公告)日：2002-04-19
申请号：JP2000311719
申请日：2000-10-05
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , KIKUCHI HITOSHI
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide a composite fiber optics overhead ground wire having a structure which stabilizes the transmission loss characteristic of the optical fiber situated at both ends of a tape fiber stored in a spacer grove and which also enables a stress relaxing effect to be imparted to the optical fiber. SOLUTION: The structure is such that a cushioning spacer is stored in a protective tube which is twined with a conductive wire on the outside, that a plurality of tape fibers are stored in a laminated state in this spacer groove, and that, by using the elasticity of this spacer, a stress relaxing effect is imparted to the optical fiber as well as restraining optical fiber behaviors inside an optical fiber unit to which various cable behaviors are imparted. In addition, this cushioning property, i.e., the buffering effect improves the buffering effect against a lateral pressure to the optical fiber stored in the spacer groove, and then the transmission loss characteristic of the optical fiber at both ends of the tape fiber can be stabilized. A desirable material of the cushioning spacer is sponge.

9. 发明专利

JP2001342751A SNOW RESISTANT FENCE 失效
公开(公告)号：JP2001342751A
公开(公告)日：2001-12-14
申请号：JP2000169065
申请日：2000-06-01
申请人： HITACHI CABLE
发明人： OTAKA KAZUYOSHI , KIKUCHI HITOSHI
IPC分类号： E04H17/02
摘要： PROBLEM TO BE SOLVED: To provide a snow resistant fence by eliminating the occurrence of deformation due to the weight of snow without taking a special step such as reinforcement to the fence in itself. SOLUTION: A heat dissipation part of a heat pipe, laid on the furring strips of wire netting, melts the fallen snow, reduces the settling force of the snow, which is applied to the furring strips, and prevents the deformation in the case of settlement of the snow to the furring strips. The heat dissipation part of the heat pipe, laid on the upper furring strips, can get ahead of others in melting the settling snow. The length of the heat dissipation part is made to range from 2 to 8 m.

10. 发明专利

JP2001243845A WIND NOISE DAMPENING INSULATOR 失效
公开(公告)号：JP2001243845A
公开(公告)日：2001-09-07
申请号：JP2000056018
申请日：2000-02-28
申请人： HITACHI CABLE
发明人： KIKUCHI HITOSHI , KUBOKAWA HIROSHI
IPC分类号： H01B17/20
摘要： PROBLEM TO BE SOLVED: To provide a wind noise dampening insulator with a wind noise dampening element having a function to dampen wind noises as well as having a function of preventing corrosion of an insulator pin. SOLUTION: A wind noise dampening insulator 10 has the wind noise dampening element 40 enclosing the insulator pin 23 of an insulator coupling part 35. Inside of the wind noise-dampening element 40, a sacrificial metal block 11 is embedded so as to contact with the insulator pin 23.

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