CN205189490U - Insulating cross arm - Google Patents

Abstract

The utility model relates to an insulating cross-arm. The cross-arm body is a hollow rectangular pipe body, and both ends of the rectangular pipe body are open ends. The joints of two vertical planes in the rectangular pipe body For the arc connection surface. The insulating cross-arm is improved in terms of raw materials and structure. It is made of rectangular tube structure and glass fiber material, which meets the strength and bearing weight of the cross-arm, and solves the phenomenon of line tripping caused by overvoltage.

Description

Insulated cross arm

technical field

The utility model relates to the field of lightning protection of electric power systems, in particular to an insulating cross arm.

Background technique

According to the research results, it can be known that lightning flashover depends on the overvoltage value and the insulation level of the line. The research shows that the severity of the arc caused by lightning is reduced with the decrease of the electric field gradient along the flashover path. Therefore, improving the insulation level of lines and increasing the insulation performance of power towers can significantly improve lightning flashover. At present, most of the power poles and towers of the distribution network system at home and abroad have iron cross-arms, wooden cross-arms, and porcelain cross-arms. The wooden cross-arm is not strong enough and has weak corrosion resistance; the porcelain cross-arm is not strong enough and has insufficient bending resistance; the iron cross-arm has poor insulation performance and is easy to rust.

At present, the poles of 10KV power transmission and distribution lines are all iron cross-arms, which are treated by hot-dip galvanizing of angle iron, and then punched. Hot-dip galvanizing is very serious for environmental pollution; in addition, the traditional iron cross-arm is made of 63 angle steel , The installation is bulky and inconvenient, and it cannot play the role of insulation, which brings a lot of trouble to the line operation. In order to adapt to the development of the social tide, the insulating cross arm will be a breakthrough and innovation of electric power products.

Utility model content

The purpose of this utility model is to overcome the defects in the prior art, and to design an insulating cross-arm. The insulating cross-arm is a bold breakthrough from the raw material. The traditional iron cross-arm uses 63 angle steel, which cannot play the role of insulation. We consider Comprehensive factors, make important improvements in materials, while satisfying the strength and load-bearing gravity of the cross-arm.

In order to achieve the above purpose, the technical solution adopted by the utility model is an insulating cross arm, the body of the cross arm is a hollow rectangular tube body, and both ends of the rectangular tube body are open ends, the rectangular tube body The junction of two vertical planes in the pipe body is an arc-shaped junction.

Among them, the preferred solution is that the arc-shaped connecting surface includes an inner surface and an outer surface, the inner surface is an arcuate body curved toward a direction close to the outer surface, and the outer surface is curved toward a direction away from the inner surface. Arcoid.

Wherein the preferred solution is that the wall thickness of the rectangular pipe body is 6-10mm.

Wherein the preferred scheme is that the pipe wall thickness of the rectangular pipe body is 8mm.

The preferred solution is that the rectangular pipe body is made of fiberglass wire.

Among them, the preferred solution is that the four planes of the rectangular tube body are specifically composed of two parallel first planes with long sides and two parallel second planes with short sides.

The preferred solution is that several groups of corresponding circular through holes and/or strip-like through holes are provided on the two first planes.

The preferred solution is that several groups of corresponding circular through holes and/or strip-like through holes are provided on the two second planes.

Advantage and beneficial effect of the present utility model are:

1. The insulating cross-arm of the utility model has a novel structure, adopts a rectangular tube body structure, and has a smooth surface and self-cleaning property, so as to avoid leaving moisture or dust on it and causing the insulation of the cross-arm surface to decline, and it is also energy-saving. Certain breakthroughs have been made, especially after installing the insulating cross arm of the utility model, the line will no longer cause line tripping due to overvoltage.

2. The inner side and outer side of the arc-shaped connecting surface are curved arc-shaped bodies that are outwardly curved. While ensuring its mechanical properties, it can also improve the insulation performance of the tower, reduce the discharge at the tip, increase the lightning flashover path, and improve the lightning protection of the line effect.

3. The insulating cross arm made of glass steel wire winding mainly solves the problem: the line is completely insulated from the earth, even after the insulator breaks down, the line will not be grounded, so that the line will not trip.

4. Its rectangular tube body structure is light and convenient to install, and several groups of corresponding circular through holes and/or strip through holes are provided on the tube body to further optimize the operation of convenient installation.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 insulation cross-arm;

Fig. 2 is the structural representation of embodiment 2 insulation cross-arm;

Fig. 3 is a schematic structural view of the insulating cross arm of Embodiment 3.

1. Cross arm body; 10. Arc connection surface; 11. Inner side; 12. Outer side; 2. First plane; 3. Second plane; 4. Circular through hole; 5. Strip through hole.

detailed description

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

Example 1

As shown in Figure 1: an insulating cross-arm, including a cross-arm body 1, the cross-arm body is a hollow rectangular tube 1, and both ends of the rectangular tube 1 are open ends, the The connection between two vertical planes in the rectangular pipe body 1 is an arc-shaped connection surface 10 .

The tube wall thickness of the rectangular tube body 1 is 6-10 mm, preferably 8 mm. The entire rectangular pipe body 1 is made of fiberglass wire.

Example 2

On the basis of Embodiment 1, the preferred embodiment of the present invention has the same structure except that the following structures are different from Embodiment 1.

As shown in Figure 2: the arc-shaped connecting surface 10 includes an inner surface 11 and an outer surface 12, the inner surface 11 is an arcuate body curved toward the direction of the outer surface 12, and the outer surface 12 is curved away from the outer surface 12. The inner surface 11 is an arcuate body curved in a direction.

Example 3

On the basis of Embodiment 2, the preferred embodiment of the present utility model has the same structure except that the following structures are different from Embodiment 2.

As shown in Fig. 3 : the four planes of the rectangular tube 1 are specifically composed of a first plane 2 with two parallel long sides and a second plane 3 with two parallel short sides.

Several groups of corresponding circular through-holes 4 and/or strip-shaped through-holes 5 are provided on the two first planes 2 . Several groups of corresponding circular through-holes 4 and/or strip-shaped through-holes 5 are provided on the two second planes 3 .

The above is only the preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present utility model.

Claims (8)

1. An insulating cross-arm, comprising a cross-arm body, characterized in that the cross-arm body is a hollow rectangular tube (1), and both ends of the rectangular tube (1) are open ends, The connection between two vertical planes in the rectangular pipe body (1) is an arc-shaped connection surface (10). 2. The insulating cross arm according to claim 1, characterized in that, the arc-shaped connection surface (10) includes an inner surface (11) and an outer surface (12), and the inner surface (11) is close to the The outer surface (12) is an arcuate body curved in a direction, and the outer surface (12) is an arcuate body curved in a direction away from the inner surface (11). 3. The insulating cross arm according to claim 1, characterized in that, the tube wall thickness of the rectangular tube body (1) is 6-10 mm. 4. The insulating cross arm according to claim 3, characterized in that, the tube wall thickness of the rectangular tube body (1) is 8 mm. 5. The insulating cross arm according to claim 1, characterized in that, the rectangular pipe body (1) is made of fiberglass wire. 6. The insulating cross arm according to claim 1, characterized in that, the four planes of the rectangular tube body (1) are specifically the first plane (2) of two parallel long sides and two parallel short sides The second plane (3) of the edge is composed. 7. The insulating cross-arm according to claim 6, characterized in that, several groups of corresponding circular through-holes (4) and/or strip-like through-holes (5) are provided on the two first planes (2). ). 8. The insulating cross arm according to claim 6, characterized in that, several groups of corresponding circular through-holes (4) and/or strip-like through-holes (5) are provided on the two second planes (3). ).