SU65425A1 - Suspension Support for Power Line Wires - Google Patents

Description

At present, in connection with the very wide scope of construction of overhead transmission lines of 110–400 kV, an intensive search is being made for expedient new forms of support for the suspension of electrical wires.

The main requirements imposed on the wire supports of transmission lines are as follows: 1) the smallest possible amount of building materials for the supports and bases,

2) transfer as much of the work as possible to the workshop and as little as possible to the field,

3) maximum simplification of work by introducing as many as possible into the same construction completely identical parts; 4) the support should be transported in as large parts as possible; Construction details should have a simplest form and minimum lateral dimensions that are most convenient for rail and autowagon transportation.

According to the inventor, the proposed support meets all these requirements in a fairly satisfactory degree.

Like the known one, the proposed support forms a pyramid at the bottom, and at the top a fork supporting a transverse beam for wires, and differs from these known ones in that the two edges of the specified pyramid and the fork are formed by two X-shaped intersecting rods, and the third edge of the pyramid - a strut propping up said rubbers or at the point of their intersection.

The foregoing summary of the invention is illustrated in the drawing, on ф; 5Р and 5-8 of which two variants of the proposed support are shown schematically.

The lower part of the support according to FIG. 1-4 consists of three rods AD, CD and VD forming a three-sided pyramid and adjacent to three foundations at points A, B and C. The upper part of the support is developed in accordance with the necessary arrangement of wires and grounded cables in the form of a plug, whose DL line is a continuation lines AD, and the line DR - the continuation of the line BD.

At points and F, the fork is tied with a beam of RP, above which the FL and EK horns remain, for the cable.

FIG. 1-4 shows an intermediate support; However, the same scheme remains in principle for both anchor and angular support, in which case points A and E or F and 5 can be connected by a rigid rod or flexible rod.

The support may be either wooden or metal. In the first case, no explanations are needed, since the structure of the support is possible only from wooden boards or from round wood. In the second case, i.e., when metal is intended for the manufacture of a support, the advantageous shape of the support most often will require not solid beams, but composite Rods such as through columns, tetrahedral or triangular; this applies to all pivots AD, CD, BD, ED, DF and PR. In accordance with the requirements of the cheapest transport, each of these rods can be made, flax in the whole form or consisting of two parts (along its length), and the longest parts even of three parts.

The support shown in FIG. 4, with a total height of about 37 m for a 400 kV transmission line, could be made, for example, with a maximum length of a separate part of 9.8 m: AD, CD, BD, DE, FD rods - in two parts, PjR rod -nz three parts and rods FL and EK from one part. Thus, the entire support can be made of 15 parts.

For large horizontal forces, the bending moment increases strongly and dramatically increases the weight of the AF and BE rods. In this case, the implementation of the rods in the form of trussed beams (Fig. 5-8) with the rods fastened to the rods x DM and DN significantly reduces the weight of the rods in question, and at the same time the whole structure.

The drawing conventionally shows massive foundations, however there are no obstacles to the direct incorporation of the legs of the support into the ground — in a wooden structure this will be inevitable, and in the metal one it is possible with the help of a lightweight reinforced concrete footplate.

In accordance with its appearance, the support receives the name of the support type LH.

The inventor claims that, according to made quick calculations, the support LH promises to be 20-25% lighter than other types. This accomplishes paragraph 1 of the conditions imposed on the supports. Items 2, 3 and 4 of the same conditions are fulfilled by the fact that rods, for example, metal supports will be made in the form of simple structures, entirely in workshops, and their transport will require minimal technical and monetary costs.

Subject invention

A support for hanging the wires of the power line, forming a pyramid at the bottom and a plug at the top. supporting transverse beam for wires, characterized in that the two edges of the pyramid and the fork are formed by two X-shaped intersecting rods, and the third edge of the pyramid is formed by a brace supporting the indicated rods at the point of their intersection.

FIG. one

tt E

FIG 2 f /

F /

I

: ".

FIG. 3

F

.6cbjnmfOi /.

/ e

FIG. four

rt i

fl. P / P

L

-P