Cable troughs used in earthquake areas and loose soil areas

Abstract

The invention discloses a cable trough used in a seismic region and a loose soil region. The cable trough comprises a bottom plate, wherein two short side holes are formed in a short side part, two long side holes are formed in a long side part, and the short side holes and the long side holes are symmetrically formed; when two bottom plates are butted, the distances between the short side holes and the long side holes are equal; vertical columns are inserted in the short side holes and the long side holes, and vertical column holes are formed in the bottom parts of a short side plate and a long side plate; two positioning grooves which are parallel to a short side are formed in the bottom plate, the two positioning grooves are symmetrically formed, and partition plates extending upwards are inserted in the positioning grooves; and the upper parts of the short side plate and the long side plate are buckled with a cover plate in the same shape with the bottom plate. The cable trough is reasonable in structure, can be paved in a manner of extending along a straight line, can be paved in an arc shape according to turning needs anytime and anywhere, and has the advantages of tight joint, smooth transition, simple construction, high efficiency, high interphase safety of cable, small storage occupation space, convenient transportation, and little possibility of damage.

Description

technical field [0001] The invention relates to a cable trough used in an earthquake area and an area with loose soil. Background technique [0002] With the gradual improvement of urban power supply quality requirements, the current domestic urban high-voltage power supply mode has basically completed the conversion from high-voltage overhead line power supply to underground high-voltage power supply. Underground high-voltage power supply mainly includes two forms: underground pipeline high-voltage power supply and underground trench high-voltage power supply. Among them, the high-voltage power supply in underground trenches requires the laying of high-voltage cable trenches containing high-voltage cables underground. [0003] The power system has made industrial construction regulations for the laying of high-voltage cable trenches, specifically: 1. The buried depth of cable climbing poles and towers must be increased reasonably according to the specific conditions on sit...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this kind of high-voltage cable groove are: 1. It is only suitable for laying straight cable grooves. When the cable groove turns, it can only make a right-angle turn. Requirements, either on-site cutting and shaping of the prefabricated high-voltage cable grooves, so that the butt joints of the prefabricated high-voltage cable grooves at the corners are even, the on-site processing is difficult, time-consuming and laborious; or the prefabricated high-voltage cable grooves at the corners There is a gap between them to meet the turning requirements, but after such use, water leakage and soil leakage will inevitably occur in the gap, which will eventually cause the cable groove to be filled with sand, which not only does not meet the construction requirements, but also brings troubles for future cable maintenance and transformation. 2. Since the cross-section of the prefabricated high-voltage cable groove is U-shaped, it takes up a lot of space and is extremely inconvenient during transportation and storage. Moreover, this structure has low impact resistance and is easy to be damaged by force; 3. There is no spacer in the prefabricated high-voltage cable groove, and three single-core cables are laid in the same groove, which will cause contact between the cables and phases, which is likely to cause cable accidents; 4. When the grooved line turns, each prefabricated high-voltage cable There will be gaps of different sizes at the junction of the cable trenches, which require additional on-site caulking construction, otherwise there will be soil leakage and mud leakage into the cavity of the trench, which will seriously affect the use of cables or optical cables in the trench Safety

[0006] At present, some design and construction units also use on-site prefabricated concrete troughs. Due to the brutal use during lifting and unloading during the construction process, the bottom trough and the cover plate will be exposed due to the damage of the concrete layer. Contact will inevitably form a closed magnetic circuit for the single-core cable, causing damage to the single-core cable due to eddy currents

Images