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Composite cross arm for power transmission line and preparation method thereof

A technology of composite materials and transmission lines, applied in chemical instruments and methods, layered products, buildings, etc., can solve problems such as poor insulation performance of cross-arms, potential safety hazards, and short service life, so as to improve the overall insulation performance and rigidity Requirements, the effect of solving potential safety hazards

Active Publication Date: 2012-12-12
北玻电力复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional cross-arms usually use iron cross-arms and wooden cross-arms. Iron cross-arms and wooden cross-arms have exposed various problems during long-term operation, such as heavy weight, perishability, rust or cracking, durability, resistance Poor flammability and insulation performance, low strength, short service life, difficult construction, transportation and operation and maintenance, which consumes materials and increases the labor intensity of operators; there are also various safety hazards
In order to solve the defects of poor insulation performance and short service life of the cross-arm in the prior art, there is a FRP cross-arm processed with composite materials, and the fiber-reinforced resin-based composite material (hereinafter referred to as FRP) used in the cross-arm has strength High, light weight, corrosion resistance and fatigue resistance, durability and electrical insulation performance, performance can be designed, etc., using this fiberglass cross-arm to replace iron cross-arm and wooden cross-arm, improve the electrical insulation performance of the cross-arm, Solved various defects of iron cross-arm and wooden cross-arm
Since the FRP cross-arm adopts a hollow structure, that is, the core layer of the cross-arm is made of hollow glass steel pipes, and the inside is filled with insulating inert gas. After a period of running on the line, breakdowns will occur in different degrees, which is a guarantee for the safe operation of the transmission line. Buried hidden dangers, therefore, before such breakdown phenomenon is completely solved, the hollow composite crossarm will not be promoted and implemented

Method used

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  • Composite cross arm for power transmission line and preparation method thereof
  • Composite cross arm for power transmission line and preparation method thereof

Examples

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preparation example Construction

[0022] Simultaneously, the present invention also provides the preparation method of above-mentioned composite material cross-arm for transmission line, and this method comprises the following steps:

[0023] 1) Utilize the pultrusion forming method to pultrude the core layer 1 of the composite material cross arm, the core layer 1 is a composite material solid rod; its diameter is 100-130 mm; then, the outer surface of the composite material solid rod is treated, and the The surface is processed into a thread shape by the lathe, and the thread depth is 1-2mm;

[0024] 2) On the threaded surface of the composite material solid rod in step 1), the glass fiber yarn impregnated with the thermosetting resin matrix glue is evenly wound; Fiber unidirectional cloth; the winding tension of glass fiber yarn and glass fiber unidirectional cloth is 16-35N; then put it into a rotary curing furnace, dry at low speed, and cure to form the middle layer of the composite material cross arm; Am...

example 1

[0039] The composite cross arm of the present invention is divided into a core layer, a middle layer and an outer layer from inside to outside; the specific forming steps are as follows:

[0040] 1) The core layer is pultruded into a core layer by conventional pultrusion molding method. The material of the core layer is mixed with vinyl ester resin and glass fiber yarn, and pultruded into a solid rod of composite material; its diameter is 100mm; The outer surface of the solid rod is processed, and the surface is processed into a thread shape by using an ordinary lathe, and the thread depth is 1mm;

[0041] 2) On the threaded surface of the composite material solid rod in step 1), the glass fiber yarn impregnated with the thermosetting resin matrix glue is evenly wound; in order to remove the moisture in the glass fiber yarn and increase the wettability of the fiber yarn and resin, the glass fiber yarn Before winding, it needs to be baked in an oven; the baking temperature is 5...

example 2

[0052] Concrete forming step is basically the same as example 1, and its difference is:

[0053] 1) The thread depth on the surface of the core layer is 2mm;

[0054] 2) The glass fiber yarn is baked in the oven at a temperature of 70°C, and the baking time is 36 hours; the winding tension is 35N;

[0055] When the glass fiber yarn is wound to a thickness of 15mm, 6 pieces of glass fiber unidirectional cloth cut in advance according to the specification of 400×400mm are fully immersed in the thermosetting resin matrix glue, and after the glass fiber yarn is wound to a thickness of 18mm, the The glass fiber unidirectional cloth is 410mm-810mm from the root of the cross-arm to its end, and according to the direction in which the fiber direction in the glass fiber unidirectional cloth is parallel to the axis of the cross-arm, six pieces of glass fiber unidirectional cloth with a thickness of 0.8mm are placed in sequence. The cloth is evenly wound on the surface of the glass fibe...

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Abstract

The invention discloses a composite cross arm for a power transmission line and a preparation method thereof, belonging to the field of members matched with power transmission poles. The structure of the composite cross arm for the power transmission line adopts the cylindrical solid structure, and the cylindrical solid structure is divided into three layers, namely a core layer, an intermediate layer and an outer layer, from inside to outside, wherein the core layer is a composite solid rod which is formed by pultrusion; the intermediate layer made of a glass fiber resin based composite is wound on the outer surface of the solid rod; and the outer layer constituted by an umbrella skirt is coated on the outer surface of the intermediate layer. The preparation method comprises the following steps: performing the pultrusion on glass fiber reinforced thermosetting resins for forming the core layer; winding the resin-based composite on glass fibers for constituting the intermediate layer;and coating the layer of the umbrella skirt outside the intermediate layer for constituting the outer layer. The cross arm prepared by the method is light in weight, good in insulativity and anti-aging performance and convenient to mount, and can effectively improve the safety coefficient of the actual line when being applied on the actual line and reduce the cost.

Description

technical field [0001] The invention relates to a composite material cross arm for transmission lines and a preparation method thereof, belonging to the field of supporting components of transmission lines. Background technique [0002] In the field of power facilities, the cross arm for transmission lines is an important supporting structural part of the transmission pole. One end of the cross arm is connected to the main body of the transmission pole, and the other end is hung with the transmission wire. Traditional cross-arms usually use iron cross-arms and wooden cross-arms. Iron cross-arms and wooden cross-arms have exposed various problems during long-term operation, such as heavy weight, perishability, rust or cracking, durability, resistance Poor flammability and insulation performance, low strength, short service life, difficult construction, transportation and operation and maintenance, which consumes materials and increases the labor intensity of operators; there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04H12/24E04H12/02B32B17/04B32B17/10
Inventor 曹小平陈澍张雄军郝春功李济民彭玉刚贾伟赵爱军于成
Owner 北玻电力复合材料有限公司
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