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11. 发明专利

JPH06245357A CLAMP STRUCTURE OF SPACER FOR OVERHEAD TRANSMISSION LINE 失效
公开(公告)号：JPH06245357A
公开(公告)日：1994-09-02
申请号：JP2675693
申请日：1993-02-16
申请人： HITACHI CABLE
发明人： YAMAMOTO KENJI
IPC分类号： H02G7/00
摘要： PURPOSE:To provide a structure of spacer for overhead transmission line in which local concentration of high current is prevented even if a fault current flows through an overhead transmission line by reducing the contact resistance between the overhead transmission line and the clamp member of spacer. CONSTITUTION:The clamp structure of a spacer 1 comprises a spacer 1 for holding an overhead transmission line 2 while spacing apart by a predetermined distance, a member 4 having outer peripheral part of semicircular cross-section for gripping the overhead transmission line, and armor rods 5 to be applied to the outer peripheral part of the gripping member 4, wherein the gripping member 4 and the armor rods 5 are made of a conductive member. Protrusions 10 for holding the armor rods 5 and engaging the armor rods 5 with the gripping member 4 at same potential are formed on the outer peripheral part of the gripping member 4 and a buffer layer 8 of rubber, for example, is applied to the outer peripheral part of the gripping member 4.

12. 发明专利

JPH05287552A 失效
公开(公告)号：JPH05287552A
公开(公告)日：1993-11-02
申请号：JP8719192
申请日：1992-04-08
申请人： HITACHI CABLE
发明人： MANOME MINORU , YAMAMOTO KENJI , YAMAGISHI RYOZO
IPC分类号： C23C22/56 , H01B13/00
摘要： PURPOSE:To harmonize an aerial transmission line of Al or Al alloy with natu ral environment by enabling the treatment of this wire at a low cost and suppressing Munsell lightness to =80 to 100 mesh size by sand blasting using an alumina abrasive material. The aerial transmission line subjected to this surface roughening treatment is immersed into an aq. soln. contg. at least one kind among 0.01 to 1.0vol.% triethanol amine which is water soluble amine, 2 to 200mg/l silicic acid and 1 to 500mg/l calcium. The aq. soln. is kept at a high-temp. state of >=50 deg.C. As a result, the treated film of a gray or dark black color with which the prescribed low lightness is attained is formed.

13. 发明专利

JPH04154979A LIGHTNESS LOWERING TREATMENT OF ALUMINUM MATERIAL 失效
公开(公告)号：JPH04154979A
公开(公告)日：1992-05-27
申请号：JP27496090
申请日：1990-10-12
申请人： HITACHI CABLE
发明人： YAMAMOTO KENJI , SANBONSUGI KIYOSHI , MANOME MINORU
IPC分类号： B24C1/06 , C23F1/00 , C23F1/36
摘要： PURPOSE:To prevent the reflection of light having the color of Al and to obtain a surface having a hue matched with nature by roughening the surface of the Al material with jetted alumina particles and immersing the Al material in a Ca-contg. alkaline aq. soln. at a high temp. CONSTITUTION:Alumina particles of 80-100 mesh size are jetted on the surface of an Al material to roughen the surface. The Al material is then immersed in a Ca-contg. alkaline aq. soln. at a high temp. to obtain a dark-gray surface having

14. 发明专利

JPH03143215A SNOW REMOVING DEVICE WITH HAMMER 失效
公开(公告)号：JPH03143215A
公开(公告)日：1991-06-18
申请号：JP15100989
申请日：1989-06-14
申请人： HITACHI CABLE
发明人： ABE KATSUYOSHI , SHIMOJIMA KIYOSHI , KAWAMURA TOSHIO , YAMAMOTO KENJI
IPC分类号： H02G7/16
摘要： PURPOSE:To remove snow completely from cables by striking a spiral rod wound and installed in the longitudinal direction while forming a gap between the spiral rod and a transmission line by a stroke type device. CONSTITUTION:A spiral rod 2 shaping a gap G is wound and mounted to a wire 1, and the terminal sections of one end or both ends of the spiral rod 2 are fixed by a support piece 3. A hammer 4 uses a current transformer 6 as a power supply, and is driven by a drive section 5 connected by a lead 7. The hammer 4 is driven up and down, and strikes the spiral rod 2. Striking vibrations given to the spiral rod 2 by the hammer 4 are not damped so much, and are transmitted over overall winding length while employing the spiral rod 2 as a propagation medium. Snow capped onto the wire 1 is dropped by the vibrations of the spiral rod 2. When snowfall is heavy and the quantity of snow attached to the wire 1 is increased, the striking pitches of the hammer 4 are accelerated, thus preventing the fixing of the hammer 4.

15. 发明专利

JPH03128615A SPACER CLAMP FOR TRANSMISSION LINE 失效
公开(公告)号：JPH03128615A
公开(公告)日：1991-05-31
申请号：JP26469689
申请日：1989-10-11
申请人： HITACHI CABLE
发明人： KOSUGIYAMA AKIO , YAMAMOTO KENJI
IPC分类号： H02G7/00 , H02G7/12
摘要： PURPOSE:To prevent a bearing box from coming off even in the vibration of a transmission line by forming three or more fitting projections on the periphery of the section, forcedly fitted in a clamp base, of the bearing box. CONSTITUTION:A bearing box 4 is made of two hollow half pieces 4a and 4b and a nut housing recession to contain and hold a nut 5 is made in one end thereof. A half of a spindle insertion hole 8 to insert a spindle 2 is made in each of the half pieces 4a and 4b, which are assembled to complete the spindle insertion hole 8. The spindle 2 is inserted into the spindle insertion hole 8 and the nut-housing side of the bearing box 4 is fitted forcedly and integratedly into a fitting hole made in a clamp base 7a. Protrusions 9 tighten the coupling between the bearing box 4 and the clamp base 7a. According to the invention, two or more protrusions 9, for example, protrusions 91-93 are provided. Thereby the frictional effect geometrically increases and the bearing box 4 is prevented from coming off by vibration of a transmission line.

16. 发明专利

JPH02311119A COUNTERMEASURE AGAINST NOISE OF WIND OF MULTIPLE-CONDUCTOR TRANSMISSION LINE 失效
公开(公告)号：JPH02311119A
公开(公告)日：1990-12-26
申请号：JP13250189
申请日：1989-05-25
申请人： HITACHI CABLE
发明人： KARASHI YUJI , SHIMOGAMO KIYOSHI , YAMAMOTO KENJI
IPC分类号： H01B5/08 , H02G7/14
摘要： PURPOSE:To reduce both an AN ratio and the noises of a wind coordinately by changing a potential gradient in a multiple conductor-changed bundle circle into equipotential and scaling up space having the equipotential gradient. CONSTITUTION:It is determined that an AN value rectilinearly lowers with the increase of a wrapping angle theta while there is no significance difference up to theta=160 deg. in the noises of a wind as the result of the relationship of the wrapping angle theta and the AN value. It is determined that there is the wrapping angle theta, where the AN value lowers only by approximately 10dB to the wrapping angle=0 deg., at the position of 120 deg.. SpiraI rods 2 as single bodies are only wound oppositely on element conductors 11, 12 positioned at sections upper than a virtual central horizontal line while six spiral rods 2, 2 are fast stuck respectively and wound oppositely so that 120 deg.

17. 发明专利

JPH02294214A SNOW DROPPER FOR TRANSMISSION LINE 失效
公开(公告)号：JPH02294214A
公开(公告)日：1990-12-05
申请号：JP11271189
申请日：1989-05-01
申请人： HITACHI CABLE
发明人： KAWAMURA TOSHIO , SHIMOJIMA KIYOSHI , ABE KATSUYOSHI , KAWAKAMI TAKASHI , YAMAMOTO KENJI
IPC分类号： H02G7/16 , H01B5/08
摘要： PURPOSE:To allow a spiral rod to clear away the snow just in case of need by arranging a snowfall detection sensor to a driving gear and by controlling the drive and stop of the driving gear depending on the snowfall detection result by this snowfall detection sensor. CONSTITUTION:A spiral rod 2 with an inside diameter greater than the outside diameter of a cable 1 is wound around the outside circumference of the cable 1. By the rotation or rectilinear motion of this spiral rod 2 with a driving gear 3 the snow 30 on the cable 1 is forced to drop. In this case, a snowfall detection sensor 6 is arranged to the driving gear 6 so that the drive and stop control of the driving gear 3 may be performed depending on the snowfall detection result by this snowfall detection sensor 6.

18. 发明专利

JPH0226214A RING FOR COUNTERMEASURE OF FALLING SNOW 失效
公开(公告)号：JPH0226214A
公开(公告)日：1990-01-29
申请号：JP17426588
申请日：1988-07-13
申请人： HITACHI CABLE
发明人： SHIMOJIMA KIYOSHI , YAMAMOTO KENJI , KAWAKAMI TAKASHI , KUMOFUJI KATSUYOSHI , KOMATSU MASAYASU
IPC分类号： H02G7/16 , H01B5/08
摘要： PURPOSE:To change falling snow into small pieces and prevent any damage from being generated under wires by fitting a shade section having a width large than that of a base section fitted on the wire. CONSTITUTION:A ring 10 is composed of a base section 1 to be fitted on a wire 20, and a shade section 2 wider than the base section 1, and between the shade section 2 and the wire 20, a gap (g) is formed. Snow is contained in the section of the gap (g), and so snow near the ring 10 is hardly dropped. Accordingly, effect for cutting off snow on the ring 10, with a shearing force is generated. Accordingly, the snow on the ring 10 is turned into small pieces and is dropped, and no damage is applied to a structure or the like under the wire.

19. 发明专利

JPH023963B2 失效
公开(公告)号：JPH023963B2
公开(公告)日：1990-01-25
申请号：JP21884684
申请日：1984-10-18
申请人： HITACHI CABLE
发明人： YAMAMOTO KENJI , NUMAJIRI FUMYA
IPC分类号： G02B6/24 , G02B6/00 , G02B6/46

20. 发明专利

JPH01264520A SNOW DAMAGE PREVENTIVE WIRE 失效
公开(公告)号：JPH01264520A
公开(公告)日：1989-10-20
申请号：JP9057188
申请日：1988-04-13
申请人： HITACHI CABLE
发明人： KAWAKAMI TAKASHI , SHIMOJIMA KIYOSHI , KARASHI YUJI , YAMAMOTO KENJI , NAKAMURA TEN
IPC分类号： H01B5/08 , H01B7/28 , H02G7/16
摘要： PURPOSE:To drop snow lump only in case of a large snowfall which exerts real influence on a wire by winding spiral rods in double on the outer periphery of the wire, and altering the winding conditions. CONSTITUTION:A first spiral rod 2 in close contact with the outer periphery of a wire 1 is wound on the wire 1, and a second spiral rod 3 is wound in relation to cross it. A spacer 4 is, for example, disposed on the rod 3, and held in relation isolated from not only the wire 1 but also the outer periphery of the rod 2. A gap G is formed between the rods 2 and 3. Thus, sliding and dropping of snow on the wire are largely prevented to hold a snow covering state. A vibration easily occurs due to the gap G, and the covering snow becomes small pieces to be dispersively dropped.

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