Abstract: As the main transmission line for instruments and equipment, cable plays an important role in effective operation of production control system. Particularly in the petroleum and chemical worksites which are required to meet the demand for high temperature resistance and fire resistance, the demand for special thermostability and fire-resistant cable is on the rise day by day. Based on the application characteristics of products and focusing on three areas of material, structure and process, the cable adopted temperature-resistant highmolecular material and was designed to have the winding refractory layer and the multi-core unequal cross section structure. It makes use of the technologies like seamless wrapping, high-temperature continuous extrusion and unequal core cabling, bringing about industrialization of products. As a domestic leader, the product can work long under the temperature of 180-200℃ and in flame for 90 minutes.

Key words: thermostability, fire-resistant, special cable, high-molecular material

摘要： 电缆作为仪器装备间的主要传输线, 对生产控制系统有效运行起着至关重要的作用, 尤其在有耐高温、 耐火要求的石油及化工场所, 对耐高温、耐火特种电缆的需求与日俱增。根据产品使用特性, 从材料、结构、工艺3 方面出发, 采用耐温高分子材料, 设计了绕包耐火层和多芯不等截面结构, 应用无缝绕包、高温连续挤出和不等芯成 缆技术, 实现产品的规模化生产, 产品性能国内领先, 长期工作温度可达180~200℃, 耐火焰燃烧90min。

关键词: 耐高温; 耐火; 特种电缆; 高分子材料