SU842181A1

SU842181A1 - Power transmission line

Info

Publication number: SU842181A1
Application number: SU792823286A
Authority: SU
Inventors: Николай Владимирович Соловьев; Иннокентий Михайлович Носов
Priority date: 1979-09-28
Filing date: 1979-09-28
Publication date: 1981-06-30

Description

(54) ЛИНИЯ ЭЛЕКТРОПЕРЕДАЧИ(54) ELECTRICAL TRANSMISSION LINE

II

Изобретение относитс к строительству линий электропередачи на так называемых качающихс опорах (со стойками, соединенными с фундаментами посредством шарниров ).The invention relates to the construction of transmission lines on so-called swinging supports (with racks connected to the foundations by means of hinges).

Известна лини электропередачи с анкерными опорами и промежуточными опорами со стойками на шарнирах, снабженными двум боковыми отт жками I.The known transmission line with anchor supports and intermediate supports with poles on hinges, equipped with two side straps I.

Анкерные опоры этой линии т желые, что обусловливает недостаточную экономичность линии.The anchor supports of this line are heavy, which makes the line economically inadequate.

Наиболее близкой к предлагаемой вл етс лини электропередачи высоког о напр жени , содержаш,а промежуточные и анкерные опоры со стойками на шарнирах и с гибкими траверсами, провода и гирл нды изол торов , в которой промежуточные опоры снабжены двум , а анкерные - четырьм боковыми отт жками 2.The closest to the proposed is the high-voltage power line, containing, and the intermediate and anchor supports with hinge posts and flexible beams, wires and wires of insulators, in which the intermediate supports are provided with two, and the anchor ones with four lateral 2

Однако опора, удерживаема в рабочем положении проводами, должна быть жестко зафиксирована относительно точек (плоскости ) креплени проводов. Крепление провода на вертикально вис ш,ей поддерживаюш ,ей гирл нде изол торов не обеспечивает фиксации опоры, так как относительно проводов оказываютс зафиксированными только нижние точки гирл нд изол торов. Верхн точка гирл нд изол торов, а следовательно , и опора могут отклон тьс в стороны на неприемлемые величины. Последнее частично устран етс ,если вместо обычной гирл нды изол торов применить сдвоенную Л-образную гирл нду. Однако в рассматриваемом случае как вертикальна , так и Л-образна гирл нда изол торов, подвешиваетс к гибкой (тросовой) траверсе, котора об зательно имеет провес, за счет которого точки креплени гирл нд изол торов могут свободно отклон тьс в ту или другую сторону от плоскости опоры на значительное рассто ние . На этом же рассто нии может перемеш .атьс и условно зафиксированна на анкерной опоре точка провода.However, the support held in the working position by wires must be rigidly fixed with respect to the points (plane) of fastening of the wires. The fastening of the wire on a vertically high, supporting it with it, the wire of the insulators does not provide fixation of the support, since only the lower points of the wire of the insulator are fixed to the wires. The upper point of the heel of the insulators, and hence the support, can be deviated to the sides by unacceptable values. The latter is partially eliminated if, instead of the usual insulator arm, a double L-shaped arm is used. However, in the case under consideration, both vertical and L-shaped wires of insulators are suspended from a flexible (cable) yoke, which necessarily has a sag, due to which mounting points of a wire of insulators can freely deviate to one side or the other from support planes for a considerable distance. At the same distance, the point of the wire can be arbitrarily fixed and fixed on the anchor support.

SS

Таким образом, даже при фиксации трех точек гибкой траверсы не обеспечиваетс необходима фиксаци опоры.Thus, even when fixing the three points of the flexible crosshead, the support is not required.

При использовании проводов в качестве элементов, удерживающих промежуточные When using wires as elements that hold intermediate

0 опоры, провода на анкерных опорах должны быть жестко зафиксированы.0 supports, the wires on the anchor supports must be firmly fixed.

Claims

These drawbacks cause unacceptably high deformability of supports and power lines in general, its lack of stability and efficiency. The purpose of the invention is to reduce deformability, increase stability and reduce the material intensity of an overhead power line. This goal is achieved by the fact that in a power line, it includes intermediate and anchor supports with articulated supports, straps, placed in the plane of intermediate supports, and divergent anchor supports, flexible crossbars, wires and wires of insulators phases, flexible supports of the supports are made of branches located in opposite sides of the vertical plane of the supports, wires of the same span are attached to each branch of the crosshead, and wires of the same phases are connected by loops. Weights are suspended at the attachment points of the wires to the insulator wires. FIG. 1 shows a line, a general view; in fig. 2-support with flexible beam (anchor and intermediate), general view; in fig. 3 - anchor support, plan view; in fig. 4 - the same, side view; in fig. 5 - intermediate support, plan view; in fig. 6 - the same, side view. High voltage power line 1 includes intermediate 2 and anchor 3 supports with posts 4 on hinges 5, flexible cross members 6, wires 7 and wires 8 insulators. In this case, the intermediate supports are provided with two, and the anchor supports are provided with four side braces 9. The wires of the same phases are connected by loops 10, and the loads of the insulators on the intermediate supports are supported by 11 branches. The bending of the traverse 6 consists of two branches located on opposite sides of the vertical plane of the support, to each branch of the traverse b attached 8 tension wires 8 insulators of the wire 7 of a single span are attached. At the same time, the anchor supports 3 are installed in no more than four intermediate supports

2. By acting on the wires 7, each branch of the flexible cross member 6 deviates from the vertical plane of the support through a considerable angle. Any deviation of the support from the vertical position leads to the horizontal movement of all points of the flexible cross member 6 and, consequently, the points of attachment of the wires 7, which causes an increase in the pull of wires on the one side of the support and a drop in the tie on the other side with any deviation of the support of the wire 7 is included in the work and support support. in a vertical position. To reduce the deformability of line 1 to standard values, every three or four intermediate supports - 2, an anchor support must be installed.

3. At the same time, in order to ensure that the intermediate support 2 remains unchanged under any loads, it is sufficient to install two straps 9 in the support plane, one on each side. Anchor supports 3, having fixed, fixing wires and cables; fastened with four straps 9, i.e. two lateral straps. In addition, on the anchor supports, the stubs 10 are mounted without any loose, sagging. To fix the intermediate supports, it is sufficient to put the wires of the insulators with the branches of the flexible beam up to the angle, hang the wires in them on the supporting clamps. At the same time, wires remain significant tension in the cable. The drops in the wire at the points of attachment of the wiring of the insulators become equal to the force required for a given angle of deflection of the wiring and the branch of the traverse. With increasing wire length 7, the deflection angle of the branches of the flexible cross member 6 increases, while reducing wire length, the angle decreases accordingly. By reducing the wire pull, for example, by increasing the temperature, the sag of the wire increases, but at the same time the angle of deflection of the suspension arms decreases and the actual length of the spans increases. Since, for a given span, the height of the supports is determined by the sag of the wires at the maximum temperature, the proposed flexible traverse reduces the height of the supports or increases the length of the spans. The suspension of additional weights 11 on the wires to the nodes of fastening of the wires ensures equal sag booms at maximum loads and at maximum temperatures, which makes it possible to further reduce the height of the supports. The calculations show that the use of an overhead transmission line on swinging supports with flexible crossbars reduces its deformability, increases stability and provides savings in metal on each support in the order of 30-35% compared with the known lines. Claim 1. Power transmission lines, including intermediate and anchor supports with hinged racks, strands placed in the plane of intermediate supports, and divergent anchor supports, flexible crossheads, wires and wires of phase insulators, characterized in that , in order to reduce the deformability, increase stability and reduce the material intensity of the power line, the flexible traverses are made of branches located in opposite sides of the vertical plane of the supports, to each branch of the traverse when