With the continuous development of the power industry, cold shrinkable cable accessories have been widely used in the power system as an efficient and reliable cable connection method. However, how to ensure the quality and reliability of cold shrink cable accessories has become an important issue in front of us. This article will conduct an in-depth review of how to ensure the quality and reliability of cold shrink cable accessories from multiple aspects, and propose corresponding solutions and measures.
1. Overview of cold shrinkable cable accessories.
Cold shrinkable cable accessory refers to a cable accessory that is pre-expanded and placed in the mounting sleeve during the manufacturing process, and when the cable needs to be connected, the attachment is contracted in the pipe by pulling out the mounting sleeve, so as to realize the sealing and insulation of the cable. Cold shrink cable accessories have excellent electrical properties, mechanical properties and environmental adaptability, and are widely used in cable routes with voltage levels of 35kV and below.
2. Factors affecting the quality and reliability of cold shrinkable cable accessories.
1.Quality of raw materials.
The main raw materials of cold shrink cable accessories include polymer materials such as silicone rubber and EPDM rubber, as well as metal materials such as copper and aluminum. The quality of raw materials directly affects the performance and quality of cold shrink cable accessories. If the quality of raw materials is not up to standard, it will lead to the degradation of the electrical, mechanical and environmental adaptability of cold shrink cable accessories, which will affect their quality and reliability.
2.Production process.
The production process is an important part of ensuring the quality and reliability of cold shrink cable accessories. If the production process is unreasonable or the control is not strict, it will lead to the size, appearance and performance of the cold shrinkable cable accessories do not meet the requirements, and even defects such as bubbles and cracks will appear, which will seriously affect its quality and reliability.
3.Installation process.
The installation process is one of the key factors affecting the quality and reliability of cold shrink cable accessories. If the installation process is not reasonable or the operation is not standardized, it will lead to the degradation of the sealing performance, mechanical strength and electrical performance of the cold shrink cable accessories, which will affect its quality and reliability.
4.Environmental conditions.
Environmental conditions are also one of the important factors affecting the quality and reliability of cold shrink cable accessories. For example, environmental factors such as extreme temperatures, humidity, corrosion, etc., can accelerate the aging and damage of cold shrink cable accessories, which can affect their quality and reliability.
3. How to ensure the quality and reliability of cold shrinkable cable accessories.
1.Strictly control the quality of raw materials.
In order to ensure the quality of raw materials, it should be strictly controlled from the selection of leading suppliers, the incoming inspection of raw materials, storage and use. For unqualified raw materials, they should be processed or returned in time to avoid using unqualified raw materials to produce cold shrinkable cable accessories that do not meet the quality requirements.
2.Optimize the production process.
The production process is an important part of ensuring the quality and reliability of cold shrink cable accessories. Enterprises should continuously optimize the production process, improve the accuracy and stability of production equipment, strengthen quality control and testing in the production process, and ensure that the quality of each link meets the requirements. At the same time, the production equipment should be regularly maintained and maintained to ensure the normal operation of the equipment.
3.Improve the level of installation technology.
The installation process is one of the key factors affecting the quality and reliability of cold shrink cable accessories. Enterprises should strengthen the training and assessment of installers, improve their skill level and sense of responsibility, and ensure that they can carry out installation operations in accordance with specifications. At the same time, the corresponding installation tools and auxiliary materials should be provided to ensure the smooth progress of the installation work. During the installation process, attention should be paid to protecting the cold shrink cable accessories to avoid damage or contamination by external forces.
4.Strengthen environmental control and management.
Environmental conditions are one of the important factors affecting the quality and reliability of cold shrink cable accessories. Enterprises should strengthen environmental control and management, keep the production site and installation site clean and dry, and avoid the impact of environmental factors such as extreme temperature, humidity, and corrosion on cold shrinkable cable accessories. For cold shrink cable accessories that are stored for long periods of time, they should be regularly inspected and maintained to ensure their quality and reliability.