CN202013445U - Insulated down lead clip for 500kV line OPGW (Optical Fiber Composite Overhead Ground Wire) optical cable - Google Patents

Abstract

The utility model belongs to the field of power transmission line design, in particular to a 500kV line OPGW optical cable insulation down-lead clamp. The insulated down conductor clamp is fixed on the main material of the tower body, which includes insulators, OPGW optical cables, binding wires and iron tower fixing frames. One end of the iron tower fixing frame is connected to the main material of the tower body, and the other end is connected to the insulator The OPGW optical cable is fixed on the insulator by binding wires. The down conductor clip with the above structure makes the OPGW optical cable down conductor insulated from the tower body, and is used together with the OPGW insulating residual cable rack and the OPGW optical cable insulation splice box, thereby realizing the operation mode of the OPGW segmental insulation and greatly reducing the OPGW The power loss caused by the optical cable also plays the role of ground wire lightning protection.

Description

A 500kV line OPGW optical cable insulation down conductor clip

technical field

The utility model belongs to the field of power transmission line design, and in particular relates to an OPGW optical cable insulation down-conductor clamp applicable to 500kV lines.

Background technique

At present, most of my country's high-voltage and ultra-high-voltage transmission lines use OPGW optical cables (OPGW optical cables, Optical Fiber Composite Overhead Ground Wire, full name "optical fiber composite overhead ground wire") and ordinary ground wires to protect transmission lines. Ordinary ground wires usually adopt the operation mode of segmented insulation and single-point grounding. Due to its communication function, OPGW has always adopted the operation mode of tower-by-tower grounding.

Under normal operating conditions, an electromagnetic field will be generated around the wires of the transmission line, and then electromagnetic induction voltage and electrostatic induction voltage will be generated on the ground wire. Because the common ground wire is insulated in sections, it avoids the loop between it and the OPGW optical cable and the ground, so that no induced current will be generated, so the energy loss on the common ground wire is very small. Because of its particularity, the OPGW optical cable has been grounded tower by tower, so that a loop is formed between the OPGW optical cable and the earth, and there is a long-term energy loss in the OPGW optical cable, which is very large during the entire life cycle of the transmission line.

Utility model content

The utility model is a new 500kV line OPGW optical cable insulating down-conductor clamp, which makes the OPGW optical cable down-conducting wire insulated from the tower body, and is used together with the OPGW insulating residual cable rack and the OPGW optical cable insulating splicing box, thereby realizing the OPGW splitting. The operation mode of section insulation greatly reduces the power loss caused by the OPGW optical cable, and at the same time plays the role of ground wire lightning protection.

In order to achieve the above object, the utility model adopts the following technical solutions:

A 500kV line OPGW optical cable insulated down conductor clamp, the insulated down conductor clamp is fixed on the main material of the tower body of the iron tower, the improvement is that the insulated down conductor clamp includes insulators, OPGW optical cables, binding wires and iron towers A fixing frame, one end of the iron tower fixing frame is connected to the main material of the tower body, and the other end is connected to the insulator, and the OPGW optical cable is fixed on the insulator by binding wires.

Wherein, the specific creepage distance of the insulator is ≥170mm, and the structural height of the insulator is ≥200mm.

Wherein, the iron tower fixing frame is an S-shaped iron tower fixing frame.

Wherein, the iron tower fixing frame is connected with the main material of the tower body and the insulator through bolts respectively.

Owing to having adopted above-mentioned technical scheme, the beneficial effect that the utility model obtains is:

The utility model optical cable insulation down conductor clamp provides reliable technical support for the operation mode of OPGW segmental insulation single point grounding, it insulates the OPGW optical cable down conductor from the tower body, thereby realizing the operation mode of segmental insulation single point grounding, It greatly reduces the induced current loss, brings huge economic benefits to the power system, and has positive significance for the construction of "energy-saving and environment-friendly" transmission lines.

Description of drawings

Figure 1 is a schematic diagram of the structure of the OPGW optical cable insulation down-conductor clip for 500kV line;

Among them, 1-insulator, 2-OPGW optical cable, 3-binding wire, 4-iron tower fixing frame, 5-main material of tower body.

Detailed ways

The insulated down-lead clamp of the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the OPGW optical cable insulation down-conductor clamp described in this example includes an insulator 1, an OPGW optical cable 2, a binding wire 3 and an iron tower fixing frame 4, and the insulating down-conducting clamp is installed on the iron tower through the iron tower fixing frame 4 The body of the tower has 5 main materials. The iron tower fixing frame 4 is an S-shaped iron tower fixing frame. One end of the S-shaped iron tower fixing frame is connected with the main material 5 of the tower body through bolts, and the end of the main material 5 of the tower body is tightly bent in the middle of the S-shaped iron tower fixing frame. , the other end of the S-shaped iron tower fixing frame 4 is connected to the lower end of the insulator 1 through bolts. The insulator 1 plays the role of insulation and support. The down conductor of the OPGW optical cable 2 can be insulated from the main material 5 of the tower body through the insulator 1, so as to facilitate the realization of the operation mode of the OPGW optical cable section insulation single-point grounding. Insulator 1 can be made of porcelain or composite insulators, the specific creepage distance of the insulator is ≥170mm, and the structural height is ≥200mm. The OPGW optical cable 2 is fixed on the upper end of the insulator 1 through the binding wire 3. Since the OPGW optical cable 2 contains optical fibers, the OPGW optical cable should not be fixed with a rigid clamp. Therefore, the utility model uses the binding wire 3 to fix the OPGW optical cable 2 on the insulator 1. In this way, the optical cable is fixed, and at the same time, the optical cable is prevented from being damaged.

The 500kV line OPGW optical cable insulation down-conductor clamp insulates the optical cable from the tower body and realizes the insulation of the optical cable. In practical applications, it can be used together with the remaining cable rack and the splice box to further realize the single-point grounding of the OPGW segmental insulation. mode of operation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present utility model can still be The specific implementation of the utility model is modified or equivalently replaced, and any modification or equivalently replaced without departing from the spirit and scope of the utility model shall be covered by the scope of the present claims.

Claims (4)

1. 500kV circuit OPGW optical cable insulation drop wire clip, this insulation drop wire clip is fixed on the body of the tower master material (5) of iron tower, it is characterized in that: this insulation drop wire clip comprises insulator (1), OPGW optical cable (2), wiring (3) and iron tower fixed mount (4), one end of described iron tower fixed mount (4) is connected with body of the tower master material (5), its other end is connected with insulator (1), and described OPGW optical cable (2) is fixed on the insulator (1) by wiring (3).

2. 500kV circuit OPGW optical cable as claimed in claim 1 insulation drop wire clip is characterized in that: the creepage ratio of described insulator (1) is apart from 170mm, the structure height 〉=200mm of described insulator (1).

3. 500kV circuit OPGW optical cable insulation drop wire clip as claimed in claim 1 or 2, it is characterized in that: described iron tower fixed mount (4) is selected S sections tower fixed mount for use.

4. 500kV circuit OPGW optical cable insulation drop wire clip as claimed in claim 1 or 2, it is characterized in that: described iron tower fixed mount (4) is connected by bolt respectively with insulator (1) with body of the tower master material (5).

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