Research and Application of Hot Air Blowing Device for Contact Line Insulators

针对接触网绝缘子在冬季零度以下低温极端条件下清洗后容易产生覆冰的问题，采用了水冲洗 + 热风吹扫的低温清洗技术方案，设计研发了一款绝缘子热风吹扫装置。采用SolidWorks + Flow Simulation软件对其热风枪进行了三维建模和CFD有限元流场分析，仿真研究了热风枪出风口0~3米内的风速和温度变化损失情况，再通过样机试验验证了仿真结果的可信度。结果表明：热风枪出风口2米的位置最高风速可达25 m/s，通过提高加热器功率提高出风口温度，可使到达出风口2米位置的吹风温度达到40℃左右。因此此装置研发设计可以实现接触网绝缘子在水冲洗后进行热风吹扫绝缘子表面的残留积水，从而防止绝缘子在低温极端天气条件下迅速覆冰，影响绝缘性能。A low-temperature cleaning technology solution of water flushing and hot air blowing was adopted to address the problem of icing on contact wire insulators after cleaning under extreme conditions of low temperature below zero in winter. A hot air blowing device for insulators was designed and developed. The 3D modeling and CFD finite element flow field analysis of the hot air gun were carried out using SolidWorks + Flow Simulation software. The wind speed and temperature changes within 0~3 meters of the hot air gun outlet were simulated and studied, and the reliability of the simulation results was verified through prototype experiments. The results show that the maximum wind speed at a distance of 2 meters from the air outlet of the hot air gun can reach 25 m/s. By increasing the power of the heater to raise the temperature at the air outlet, the blowing temperature at a distance of 2 meters from the air outlet can reach around 40˚C. Therefore, the development and design of this device can achieve the hot air blowing of residual water on the surface of the contact wire insulator after water flushing, thereby preventing the insulator from rapidly icing under low-temperature extreme weather conditions and affecting its insulation performance.