CN201818098U - Composite material cross arm - Google Patents

Abstract

The utility model relates to the technical field of insulating crossarms used on power transmission line towers, and specifically discloses a composite material crossarm, which includes a composite material mandrel and a composite material connector, and the composite material mandrel is a cone shaped barrel structure, its inclined tapered surface matches the tapered utility pole to be socketed by the composite material cross arm, and two composite material mandrels are fixedly connected on the opposite surface of the composite material connector, and the composite material mandrel is connected with the Composite connectors are formed in one piece as a monolithic structure. The composite material cross arm is made of resin-based composite material and is integrally formed. It has the advantages of simple, convenient and reliable installation, good structural stability, and high comprehensive performance such as tensile and torsion resistance.

Description

A composite cross arm

technical field

The utility model relates to the technical field of insulating cross arms used on power transmission line towers, in particular to a composite material cross arm.

Background technique

In the traditional cross-arm, the wooden cross-arm has poor flame retardancy, low strength, and short life; the metal cross-arm has poor corrosion resistance, poor insulation and large energy loss, and the cross-arm made of composite materials has the advantages of overcoming the above shortcomings and is obtained. extensive attention. In actual operation, the application of horizontally installed composite material crossarms is gradually being promoted on the power transmission lines of the high-voltage power grid, and the loads it bears are relatively complex and are a combination of various loads.

Composite insulating cross-arms in the prior art generally mainly consist of mandrels of composite material cross-arms, silicone rubber sheds, connecting bases, hanging heads/points, and the like. The connecting base is the connecting part between the cross-arm mandrel and the electric pole. During the operation, all kinds of forces and loads on the cross-arm are concentrated on the connecting base. Under normal conditions, they are indirectly transmitted to the base of the electric pole through the connecting base. . Therefore, the strength, rigidity and environmental reliability of the connection base itself are very important. Existing composite insulating cross-arm assemblies generally manufacture the composite insulating cross-arm and connectors separately and then assemble them on utility poles with metal parts such as nuts or bolts. For example, in CN88107801.8, CN97208380.4, CN03203732.5, CN200820185895.0, etc. in the prior art, it is still necessary to use U-shaped hoops and screws to connect the mandrel, connecting base and utility pole of the composite material cross arm together. . In the current method, there are hidden dangers of long construction time on site and loose connections, and in the long-term operation process, due to environmental factors such as wind load and ice coating of the wires, it is difficult to guarantee the connection strength or the critical value of structural instability under pressure Insufficient such as reduction, so the long-term operation reliability is poor.

Contents of the invention

The purpose of the utility model is to provide a composite material cross arm that has the functions of structural bearing and connection, can be quickly installed at the implementation site, and can significantly improve the reliability of long-term operation.

The technical scheme of the utility model is as follows: a composite material cross arm, which includes a composite material mandrel and a composite material connector, the composite material mandrel is a tapered tube structure, and its inclined conical surface is consistent with the composite material cross arm. The socketed tapered electric poles are matched, and two composite material mandrels are fixedly connected to the opposite surfaces of the composite material connectors, and the composite material mandrels and the composite material connectors form an integral structure through one-time molding.

The composite core rod and the composite connector are made of resin-based composite materials.

The outer surface of the composite material mandrel can be injection-molded with a silicone rubber shed.

The remarkable effect of the utility model lies in that the composite material cross arm of the present invention is made of resin material and integrally formed. It has the advantages of simple, convenient and reliable installation, good structural stability, and high comprehensive performance such as tensile resistance and torsion resistance. .

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the composite cross-arm described in the utility model;

Fig. 2 is a top view of the composite material cross-arm described in the utility model;

Fig. 3 is the front view of the composite material cross-arm described in the utility model;

In the figure: 1. Composite material mandrel; 2. Composite material connector.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 to 3, a composite material cross arm includes a composite material mandrel 1 and a composite material connector 2 made of resin-based composite materials, wherein the composite material connector 2 is a tapered cylinder structure, and its The inclined tapered surface is matched with the tapered utility pole to be socketed by the composite material cross arm, so that it is fixedly clamped on the tapered utility pole; two composite material mandrels are fixedly connected on the opposite surface of the composite material connector 2 1, and the composite material mandrel 1 and the composite material connector 2 form an integral structure through one-time molding, wherein the composite material mandrel 1 can be further injection-molded with a silicone rubber shed on its outer surface to improve the anti-pollution flashover performance. The overall structure of the composite material cross arm can be directly socketed and fixed on the tapered utility pole without any other accessories, and has the advantages of simple, convenient and reliable installation, good structural stability, and high comprehensive performance such as tensile and torsion resistance.

Claims (3)

1. A composite material cross arm, which includes a composite material mandrel (1) and a composite material connector (2), characterized in that: the composite material mandrel (1) is a tapered barrel structure, and its inclined conical surface Matching with the tapered electric pole to be socketed by the composite material cross arm, two composite material mandrels (1) are fixedly connected on the opposite surface of the composite material connector (2), and the composite material mandrels (1) and The composite material connector (2) is a one-time molding and becomes an integral structure. 2. A composite material cross arm according to claim 1, characterized in that: said composite material mandrel (1) and composite material connector (2) are made of resin-based composite material. 3. A composite material cross arm according to claim 1, characterized in that: the composite material mandrel (1) can be injection-molded with a silicone rubber shed on its outer surface.

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