REPAIR CORSET FOR REINFORCED CONCRETE SUPPORTS OF OVERHEAD POWER TRANSMISSION LINES

Abstract

This utility model relates to the field of energy, specifically to power transmission lines, and is intended for repairing reinforced concrete supports for overhead power lines. A repair brace for reinforced concrete supports for overhead power lines comprises four metal angles and eight studs secured with nuts and washers. Metal tubes are welded perpendicular to each metal angle: two parallel to each other on one outer side of the angle, and two parallel to each other on the other outer side of the angle. Studs are installed in these tubes to tighten the angles on the support. The technical result achieved by the utility model consists in expanding the arsenal of means for increasing the strength of a damaged support. 2 clauses, 1 fig.

Description

[0001] The utility model relates to the field of energy, in particular to power transmission lines, and is intended for the repair of reinforced concrete supports of overhead power transmission lines (hereinafter OHL).

[0002] During operation and inspections of the overhead power line, it was discovered that seasonal soil freezing in winter and thawing in summer cause the pile foundations of the overhead power line supports to be squeezed out. When a pile is squeezed out, the support tilts away from the vertical axis, causing tension on the conductors and increasing the load on the adjacent intermediate support. Since the intermediate support is not designed to withstand such loads, it deforms, causing concrete failure and cracks, typically at the attachment point of the upper support collar. If it is not possible to replace the deformed intermediate support, it is advisable to use temporary supports to provide additional support strength at the site of the defect until replacement, which is only possible in summer.

[0003] A reinforced concrete transmission line support with a locally restored section (patent for invention RU 2788372, IPC E04H 12 / 12, E04G 23 / 02, published on 01 / 18 / 2023) and a restored reinforced concrete transmission line support (patent for utility model RU 212958, IPC E04G 23 / 02, E04H 12 / 12, published on 08 / 15 / 2022) are known, where, to strengthen local sections of transmission line supports, ring concreting of the entire surface of the reinforced concrete support section is used as a local ring reinforcement, and composite elements are glued to the surface of the concreted section of the reinforced concrete support. The disadvantages of known supports are high material consumption and the need for additional technical resources, as well as limited restoration work only in the summer period without the possibility of using known technical solutions in hard-to-reach and remote places where overhead power lines pass in the winter.

[0004] The closest analogue of the same purpose as the device, in terms of the combination of features, is a continuous reinforcing shell, known from the method for restoring the bearing capacity of reinforced concrete transmission line supports (patent for invention 2371560, IPC E04H 12 / 00, E04G 23 / 00, published on 10 / 27 / 2009), made of structural, shrinkage-free fiber-reinforced concrete over the entire height of the support or part thereof, while the bearing capacity of the support can be further increased by installing reinforcement, which is fixed to the support before concreting the reinforcing shell. Significant disadvantages of this device are the high labor intensity of its implementation, a high probability of shrinkage with cracking and destruction of concrete later during operation, as well as the limited application of the device without the possibility of using it in hard-to-reach and remote places where overhead power lines pass without access roads and carrying out work in the winter.

[0005] The technical problem solved by the utility model is to increase the strength of the support at the site of damage in order to extend its service life.

[0006] The technical result achieved by the utility model is an increase in the rigidity of the fixed reinforced concrete support by preventing the displacement of the elements of the repair corset, in particular the metal corners, relative to each other.

[0007] The stated problem is solved, and the technical result is achieved, thanks to a repair brace for reinforced concrete overhead power line supports, comprising four metal angles and eight studs secured with nuts and washers. According to the utility model, metal tubes are welded perpendicular to the length of each metal angle: two parallel to each other on one outer side of the angle, and two parallel to each other on the other outer side of the angle. Studs are installed in these tubes to tighten the angles on the support. The distance between the first two metal tubes is shorter than the distance between the second two metal tubes, and the studs are inserted coaxially into the tubes of the opposite angles.

[0008] To increase the corrosion resistance of the structure, it is advisable to paint the metal elements with oil-based waterproof paint, and to treat the welded seams from scale and clean them.

[0009] Thanks to its lightweight, collapsible design, the claimed device can be used to reinforce damaged sections of supports of various lengths and cross-sections of metal structures without the need for additional material and technical resources, even for moving the device to hard-to-reach and remote locations where overhead power lines pass without access roads, which makes it possible to carry out work in the winter.

[0010] Fig. 1 - repair corset for reinforced concrete supports of overhead power lines,

[0011] where 1 is Corners;

[0012] 2 - Metal tubes;

[0013] 3 - Hairpins;

[0014] 4 - Nuts.

[0015] The repair corset consists of four metal corners 1, for example, 75x75 mm, welded to them perpendicular to the length of the corners 1 of metal tubes 2, for example, D20 mm, as well as eight studs 3, for example, D18 mm, having threads on both sides, installed in the said tubes 2 for tightening the corners 1 on the support, and nuts 4 with washers, fixing the position of the said studs 3. All metal elements are painted with oil-based waterproof paint.

[0016] The length of corners 1 and studs 3 depends on the damaged area of ​​the reinforced concrete support. Metal tubes 2 are electric-welded to corners 1 perpendicular to their length: two parallel to each other on one outer side of corner 1, two parallel to each other on the other outer side of corner 1. The distance between each pair of parallel metal tubes 2 depends on the length of corners 1 and the damaged area of ​​the reinforced concrete support, with the distance between the first two metal tubes 2 being shorter than the distance between the second two metal tubes 2. The welds are descaled and cleaned.

[0017] Corner pieces 1 are installed on the support at the defect location so that the tubes 2 on the adjacent sides of two opposite corner pieces 1 are aligned. Studs 3 are inserted into the coaxially located tubes 2 of the opposite corner pieces 1 and tightened with nuts 4, placing flat and engraved washers underneath them and then installing locknuts.

[0018] The repair brace for reinforced concrete overhead power line supports remains on the support until the damaged support is replaced with a new one. At that point, the device is dismantled and moved to another location for further use.

[0019] The utility model can be used at any time of the year without the need for additional equipment, and does not require significant costs for production and use.

Claims

1. A repair corset for reinforced concrete supports of overhead power lines, including four metal corners and eight studs secured with nuts and washers, characterized in that metal tubes are welded perpendicular to the length to each metal corner: two parallel to each other - on one outer side of the corner, two parallel to each other - on the other outer side of the corner, and studs are installed in the said tubes to tighten the corners on the support.

2. The corset according to item 1, characterized in that the distance between the first two metal tubes is less than the distance between the second two metal tubes.

3. A corset according to item 1, characterized in that the pins are inserted coaxially into the tubes of opposite corners.

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