Four-circuit cable off-line structure based on terminal steel pipe pole

Abstract

The invention discloses a four-circuit cable off-line structure based on a terminal steel pipe pole. It utilizes two vertical rods connected to each other, and a multi-layer cross-arm layer is arranged on the two vertical rods from top to bottom; the cross-arm layer includes at least one cross-arm, and the two adjacent layers The cross-arms are not in the same vertical plane; the cross-arms on the first vertical bar are located above the cross-arms on the second vertical bar; line, the upper, middle and lower layer wires, jumper wires and lower leads of the first circuit, the upper, middle and lower layer wires, jumper wires and lower lead wires of the second circuit; The upper, middle and lower layer wires, jumper wires and lower leads of the third circuit, the upper, middle and lower layer wires, jumper wires and lower lead wires of the fourth circuit. The downline of the four-circuit overhead line is connected and guided with the cable terminal head. While ensuring the safety distance, the space layout requirements are reduced as much as possible to form a three-dimensional downline space layout.

Description

technical field [0001] The invention belongs to the high-voltage power transmission technology, and in particular relates to a technology for realizing the off-line of a high-voltage transmission cable by using a terminal steel pipe pole, especially a structure with a four-circuit high-voltage transmission line off-line. Background technique [0002] At present, the cable terminal of the 110 / 220 kV voltage level transmission line is often connected to the overhead line by the cable drop tower. The drop tower structure is usually a truss structure. This kind of structure has many components, occupies a large area, and has a long construction and installation process. For example, 201721092218.X discloses a 110kV six-circuit cable terminal off-line tower, which uses many high-voltage off-line circuits, but the structure of the truss-type tower is complicated, which is not conducive to construction and operation and maintenance. As for the pole tower, its structure is simple, b...

AI Technical Summary

Problems solved by technology

For example, 201721092218.X discloses a 110kV six-circuit cable terminal off-line tower, which uses many high-voltage off-line circuits, but the structure of the truss-type tower is complicated, which is not conducive to construction and operation and maintenance

As for the pole tower, its structure is simple, but the existing pole tower can only be applied to two-circuit power transmission due to the cross-arm design, such as a method for vertically directing the center of a composite material pole tower and its pole tower disclosed in 201010226694.2

How to use two towers to realize the four-circuit high-voltage off-line, there is no literature report yet

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