Light aging testing method for composite core rod

Abstract

The invention discloses a light aging testing method for a composite core rod, which is characterized in that the method comprises the following steps of: 1) cutting off a test sample; 2) fixing the test sample; 3) increasing the temperature of a box body; 4) conducting a light aging test; 5) conducting a simulated rainfall test; 6) conducting a condensation test; 7) conducting a circulating test; 8) conducting visual inspection; and 9) conducting a tensile strength test. According to the working state and the performance demands of the composite core rod, not only can the alternate change of sunshine and dark environments in a natural environment, the alternate change of high-temperature and low-temperature humid and hot environments, dew condensation at dark nights and the like be designed, but also the test sample is turned round at even speed and the aging behavior of the composite core rod in the natural environment is highly simulated. After the light aging test, the tensile strength of the composite core rod is tested to fully assess the mechanical property change of the test sample before and after the light aging test. Therefore, the light aging testing method for the composite core rod has the advantages of high simulation level, complete performance assessment, high testing reliability and the like.

Description

technical field [0001] The invention relates to a test method for equipment used in power transmission lines, in particular to a test method for light aging of composite material mandrels. Background technique [0002] Conductors for transmission lines generally consist of aluminum wires for conducting electricity and core wires for bearing tension. With the continuous improvement of power grid transmission capacity, the continuous advancement of material technology and the increasingly urgent demand for energy conservation and emission reduction, wire manufacturers at home and abroad have introduced a new type of wire that uses composite material mandrels to replace traditional steel cores. This kind of wire has a series of advantages of light weight, high strength, small thermal expansion coefficient, large carrying capacity, and good corrosion resistance. It can be widely used in large-capacity, large drop, and heavy ice areas. However, since its core wire is replaced by...

AI Technical Summary

Problems solved by technology

If the traditional method is used, the sample is fixed and cannot receive circumferential and uniform light, so the aging degree of the sample will become very uneven; and after the test, only by observing the changes and defects of the sample Judging the light resistance performance of the sample can not reflect the change of the mechanical properties of the sample

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