公开(公告)号：US4450317A

公开(公告)日：1984-05-22

申请号：US345578

申请日：1982-02-04

Applicant: John A. Baskwell ,  Christopher Larrive

Inventor： John A. Baskwell ,  Christopher Larrive

IPC: H01B9/06 ,  H01B13/18 ,  H01B13/24 ,  H02G5/06 ,  H01B13/22 ,  H02G1/00

CPC classification number: H01B13/185 ,  H01B13/24 ,  H01B9/0666

Abstract: An electrical cable for very high voltage underground power transmission comprises two or more inner conductors (2) which are twisted together and are supported within the gas-filled void of a hollow extruded plastic cable sheath (4) by means of a plurality of spacers (3) which are positioned along the length of the cable, each spacer (3) being formed of solid dielectric material with a number of angularly spaced radial webs equal to the number of conductors in the cable and being engaged with the twisted conductors with the webs extending from the cable axis radially outwardly between the conductors into contact with the inner wall of the cable sheath (4) where the outermost ends of the webs engage with complementarily shaped portions (5) of the sheath (4) providing for reduction of the electrical stresses at the spacer ends. The cable is formed by extrusion of the sheath over the twisted core conductors after insertion of the spacers, and is vacuum corrugated after extrusion, the corrugator being specially formed and operated so as to accommodate the locations whereat the spacer ends engage with and locally deform the extruded sheath. The plastic sheath can be formed with multiple layers by a multiple extrusion process, and a metal outer sheath may be formed integrally with the cable and may have corrugations which mate closely with the corrugations of the plastic sheath.

Abstract translation: 用于非常高压的地下电力传输的电缆包括两个或更多个内部导体（2），所述内部导体（2）被扭绞在一起，并且通过多个间隔件（4）支撑在中空挤出的塑料电缆护套（4）的充气空间内 3），其沿着电缆的长度定位，每个间隔物（3）由固体电介质材料形成，其具有等于电缆中的导体数目的多个角度间隔开的径向腹板，并且与扭绞导体与腹板 从电缆轴线径向向外延伸到导体之间与电缆护套（4）的内壁接触，其中腹板的最外端与护套（4）的互补成形部分（5）接合，从而减少电气 在间隔端处应力。 电缆是通过在插入间隔物之后将绞合线挤压在绞合的芯导体上而形成的，并且在挤压之后是真空波纹状的，波纹机被特别地形成和操作，以便容纳间隔件端部的位置，并使局部变形 挤压护套。 塑料护套可以通过多重挤出工艺形成多层，并且金属外护套可以与电缆一体地形成，并且可以具有与塑料护套的波纹紧密配合的波纹。

公开(公告)号：US3739074A

公开(公告)日：1973-06-12

申请号：US3739074D

申请日：1972-06-13

Applicant: BBC BROWN BOVERI & CIE

Inventor： FLOESSEL D

IPC: H01B9/06 ,  H02G5/06

CPC classification number: H01B9/0666 ,  H02G5/066

Abstract: A high-voltage tubular electrical conductor is encapsulated within an insulation gas filled rectilinear tubular casing and supported centrally within the casing by longitudinally spaced support-insulators each of which is provided with three legs spaced 120* apart about the conductor. Two of the legs are fixedly secured to the conductor structure and include rolling means in the form of balls at their outer ends to facilitate abrasion-free insertion of the conductor-support insulator assembly within the casing. The third leg is supported by the tubular conductor for movement in a radial direction by a drive mechanism to enable the leg to be moved from radially inward position establishing an initial clearance with the wall of the casing during insertion of the conductor and support insulator assembly to a radially outward position establishing a springloaded elastic pressure contact with the casing wall thereby to secure the support-insulator in position against longitudinal displacement. The drive mechanism for the radially displaceable leg is a tapered screw which, when rotated by a key inserted through the conductor, advances the tapered drive sur-face longitudinally and forces the leg radially outward.

公开(公告)号：US1856109A

公开(公告)日：1932-05-03

申请号：US69089324

申请日：1924-02-06

Applicant: METROPOLITAN DEVICE CORP

Inventor： BRADLEY MURRAY JOSEPH ,  MURRAY JR THOMAS E ,  MURRAY JOHN F

IPC: H01B9/06

CPC classification number: H01B9/0666 ,  Y10T24/1412

公开(公告)号：US4160119A

公开(公告)日：1979-07-03

申请号：US625583

申请日：1975-10-24

Applicant: Jan Artbauer

Inventor： Jan Artbauer

IPC: H01B9/04 ,  H01B9/06 ,  H01B11/18 ,  H01B17/58

CPC classification number: H01B11/1856 ,  H01B9/04 ,  H01B9/0666

Abstract: High voltage electrical cable comprising an inner elongated conductive member, a corrugated metallic tubular member positioned about such inner member, and a plurality of nonconductive spacers each positioned along the longitudinal axis of the electrical cable and extending between said members through a nonconductive environment comprising, for example, a gaseous, foam or liquid insulator. To avoid premature insulation breakdown or sparkover in the vicinity of the spacers, such spacers are so configurated and positioned that their end portions coming into engagement with the corrugations of the surrounding tubular member follow the profile of the engaged corrugations so as to extend into the corrugation troughs thereof.

公开(公告)号：US4101728A

公开(公告)日：1978-07-18

申请号：US827615

申请日：1977-08-25

Applicant: Jan Artbauer

Inventor： Jan Artbauer

IPC: H01B9/06

CPC classification number: H01B9/0666

Abstract: The cable is constructed so that the inner conductor has an asymmetric contour, configuration or position in the outer conductor to reduce the field strength in some zones of the cable while the inner conductor is held in the tubular interior of the cable in such a manner so that zones of increased field strength are bridged by spacer material.

Abstract translation: 电缆被构造成使得内部导体在外部导体中具有不对称的轮廓，构造或位置，以降低电缆的一些区域中的场强，同时将内部导体以这样的方式保持在电缆的管状内部 增加的场强的区域由间隔物材料桥接。

公开(公告)号：US4053338A

公开(公告)日：1977-10-11

申请号：US693241

申请日：1976-06-04

Applicant: Philip C. Bolin

Inventor： Philip C. Bolin

IPC: H02G5/06 ,  H01B9/06 ,  H01B13/00

CPC classification number: H01B9/0666

Abstract: A method of fabricating a compressed gas insulated cable which includes the steps of securing an electrical conductor to an insulating spacer; securing the spacer to a sheath section which forms a portion of circumference of the outer sheath of the gas insulated cable; and then sealingly securing the sheath sector together to form the outer shell.

公开(公告)号：US2141894A

公开(公告)日：1938-12-27

申请号：US13189637

申请日：1937-03-19

Applicant: GEN ELECTRIC

Inventor： ALEXANDERSON ERNST F W

IPC: H01B9/06

CPC classification number: H01B9/0666