SU1283338A1 - Power line support - Google Patents

Abstract

The invention relates to the field of construction of power line poles. The aim of the invention is to ensure the use of support on multi-circuit lines. This is achieved by the fact that the power line support, which includes the racks, the cable-stayed yoke, the cable connecting the tops of the racks, the wires of the insulators and the wires of the phases, is equipped with additional racks installed between the adjacent phases of different circuits. The height of the additional posts is determined from the ratio h 0.9 / g, where /. - the height of the rack, and hi - the height of the additional rack. Such an embodiment with a multi-circuit line provides a reduction in the cross-section and length of cables of the cable network. 1 h. nt fly, 1 ill. (/)

Description

-With o

Yu

00 with SAZ ОО 00

This invention relates to the construction of high and ultra high voltage power line poles.

The purpose of the invention is to provide support for multi-chain lines.

The drawing shows schematically a support, a general view.

The support includes wires of phases 1-6, main stands 7 and 8, fixed in space with the help of release 9 and upper cable 10. With the help of cables 11 and 12, the byte suspension of the first circuit phase was carried out. Similarly, the rest of the phase is suspended. Between the main racks are additional racks 13 and 14, to which the cables of the cable cross member are attached. The height of the main racks 7 and 8 is indicated by / g, and the additional racks 13 and 14 are h. The height of the suspension of the insulators of the phases 1-b to the cables of the cable-stayed crosshead is indicated by c, the distance between the main supports ai, between them and the additional ones - 02, and between the additional ones - az. The distance between the phases of their chains (1 and 2; 2 and 3; 4 and 5; 5 and 6) is D, and between the approaching phases of different chains (1 and 4; 2 and 3; 3 and 6), which are separate groups taken d. The minimum allowable length of the isolation gap is that the support column phase is S.

The values of the angles oci for the first and fourth phases of the double-circuit USVL are taken similarly to the prototype. The magnitudes of the remaining angles are determined from the condition that the average angle a is at least not less than that of the prototype when suspended on a wire pole of a three-phase line.

Under these conditions, the main geometrical distances between the supports of the support and the minimum height of the additional supports are defined below, beginning with which savings in the consumption of materials for cables and a support rack have already been achieved.

The distance between the additional and main racks of Co, as well as between the additional racks, is primarily due to the requirements of compliance with the corresponding minimum allowable insulation gaps of the phase-to-wall support (S-ion) to the nearest phases, as well as the need to ensure the specified distances between the adjacent phases located between every two adjacent racks.

For the construction of the support, the distance ratios must be observed, and the distances from each additional rack to the nearest phase, located both on the left and right

be equal to each other and be in the configuration in question (D-

- Y) 5 to 11.

The height of the extra racks is determined from the ratio

/ zi 0.9 / g

where I 1 - the height of the additional rack;

h - the height of the main rack. To increase mechanical stiffness

the support structure of the upper cable 10, fixing its side posts 7 and 8, is attached to the tops of the additional racks 13 and 14. In connection with a decrease in the weight of the cables of the cable-stayed crosshead at the same weight values of the wires of the insulators and wires of the phases

reduction of the forces acting on the compression of the support struts is provided. The total consumption of materials for all racks of the support (including additional ones) does not increase, but decreases.

The support can be applied not only

for double-circuit AC power with pairwise approximated phases, but also for triple-chain and multi-circuit power lines, with a corresponding increase in the number of intermediate racks installed between

in separate groups of phases, as well as for direct current transmission lines.

In addition, the solution can be applied in the case of the construction of single-circuit three-phase power lines of ultrahigh and ultrahigh voltage. Every split

the phase in this case is placed in a separate window of the support. In this case, the forces acting on the grass cables are equalized.

35

Claims (2)

1. A transmission line support, including racks, a cable-stayed yoke, a cable connecting the tops of the racks, wires of insulators and phase wires, is characterized in that, in order to use the support on the multi-track lines, it is equipped with additional racks installed between groups of contiguous phases of different circuits, and the height of the top racks is determined from the ratio /eleven 0.9 / i, where h is the height of the rack; L - the height of the additional rack. 2. The support according to claim 1, characterized in that the tops of the main and additional racks are combined by a flexible rod.