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Analysis and solution of quality problems of carbon fiber wires

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Analysis and solution of quality problems of carbon fiber wires

作者: Release Date: 2018-06-01 Author: Click:

1. Carbon fiber quality problems, because the manufacturers did not strictly follow the relevant regulations and specifications, which caused some parameters of the products to be unqualified, which brought unpredictable hidden dangers to the construction process and even during operation.

2. Poor construction technology. Some construction units still use traditional wire construction methods, which leads to bulging, broken strands, or even broken wires of carbon fiber wires.

The above two problems pose certain safety hazards during operation, especially product quality problems. According to the current cases, mainly carbon rods do not meet the requirements of the specification. However, carbon cables are the bearing part of unqualified carbon rods. It is bound to cause the decline of the mechanical properties of the conductor. Even if the construction process is good and the operating conditions are encountered during operation, disconnection accidents are very likely to occur.


As an operating unit, the following aspects need to be paid attention to in the use of carbon fiber:

1. Although carbon fiber conductors have been developed for more than ten years, they have not been used in engineering and lack of operating experience. Carbon fiber conductors are not recommended for important and large spans. Aluminum alloy core high-conductivity aluminum stranded wires with the same current carrying capacity can be selected. .

2. Strict initial review, especially for capacity-enhancing projects, must have detailed conductor comparison and selection schemes, and carefully choose carbon fiber conductors. For the project to determine the use of carbon fiber conductors, understand the positioning temperature and the maximum allowable temperature of the carbon fiber conductors provided by the design unit, understand the corresponding sag characteristics of the conductors, and the selection method of the conductor connectors.

3. Due to the impact of an important leap once there is a problem, in order to ensure the safe and reliable operation of the tensile section where the important leap is located, the carbon fiber wire must not be used in the important leap. In principle, aluminum alloy core high-conductivity aluminum stranded wires with the same current carrying capacity can be used. .

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4. Strictly implement the "Construction Process and Acceptance Guidelines for Carbon Fiber Composite Core Overhead Conductors (Trial)", master the crimping process of the construction unit, and check the crimping quality. 500kV lines should be routed step by step, and 220kV lines should be driven by drones. Take photographs, etc., do a good job of the acceptance of the intermediate and completed links, and check the acceptance.

5. Where the construction unit has hard contact with the carbon fiber wire during the construction process, such as the position of the card clamp on the wire, etc., put forward trace recording requirements to avoid peeling after the problem occurs.

6. For the carbon fiber lines that have been put into operation, avoid using flying cars to prevent deformation of aluminum strands during the maintenance process. At the same time, prepare some high-temperature pre-stranded repair strips suitable for broken carbon fiber conductor strands.

7. Explore a practical method that can detect the damage of the core rod. Because the core rod is currently a single core, there is no effective detection method from the beginning of the damage to the disconnection. Therefore, explore an effective detection method to grasp the development law of the damage of the carbon rod. Imperative.

8. Advocate the concept of the full life cycle of carbon fiber conductor operation. From the beginning of operation, comprehensively grasp the operation situation, evaluate the operation condition, and infer the remaining operating time. It is also a critical issue, because once the carbon fiber conductor enters the end of life, it is important for the operating unit. It is equivalent to a time bomb, so from the perspective of the entire life cycle, it is recommended to grasp the optimal running time of carbon fiber conductors, provide strong support for subsequent replacement, and avoid replacement after major failures.

Carbon fiber wire as a new type of wire has a very good effect on capacity expansion and transformation. It is expected that in the future, old lines will be used in large quantities in the capacity expansion and transformation. However, due to the lack of operating experience at present, the operating unit generally holds Be conservative, because faults such as disconnection will put tremendous pressure on the operating unit.


URL of this article: http://herzheart.com/南方双彩网/376.html

Keywords: Henan wire and cable , Zhengzhou wire and cable , wire and cable manufacturer

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