Structure Of Tunnel Car Wash Equipment Research And Work Avoidance

The environment in tunnels has a direct effect on the traffic safety. In order to ensure driving safely, it is necessary to clean and maintain the inside of tunnels. The work of cleaning and maintaining the inside of tunnels are becoming much harder with the increasing length of tunnels[1].At present, the level of cleaning and maintaining the inside of tunnels is still low in our country. At most places in our country, the work of cleaning and maintaining the inside of tunnels are just the simple manual labors, which are very low efficient and have potential safety hazards to drivers and the personnel in tunnels. Moreover, it will cause serious traffic problems to closed tunnels only for cleaning. Therefore, it is necessary to have research and development on the technology of cleaning and maintaining the inside of tunnels. Just to do this will satisfy the needs and further enhance the level of cleaning and maintaining the inside of tunnels all over the country.The tunnel cleaning vehicle is a high level automatic machine, which integrates the technologies of mechanics, electrics and hydraulics. It is mainly used to clean the inside of tunnels. In the complex working condition, it still has good adaptability and reliability.The major research works are included as follows:1. The author designed the key components’material of the tunnel cleaning vehicle in order to improve the technical and economic performance. Considering that the arm fractured several times, the author applied the fuzzy evaluation method to make the quantitative analysis of the material selection based on the failure analysis of the components. After analyzing and comparing the four common metals, the fuzzy comprehensive evaluation results show that Q235A has the obvious advantages in such aspects as using performance, processing performance, economy etc.2. According to the modern design concepts and methods, the author finished the force analysis,3D modeling and the finite element analysis about the first mechanical arm and the second one of the tunnel cleaning vehicle. The mechanical arms’stress distribution and deformation under the different working conditions were focused on. Then, the author presented the improvement procedures of the key structure of the tunnel cleaning vehicle, which achieved the aim of the optimization design and satisfy the strength and stiffness requirements of the mechanical arms.3. The automatic obstacle avoidance system is designed for improving the cleaning effect and safety. The tunnel cleaning vehicle studied in this theme cleans the tunnel wall by the rolling brush with spraying water. The automatic obstacle avoidance system， composed of the detection devices and the control devices, makes the tunnel cleaning vehicle automatically avoid the obstacles in the cleaning process. Moreover, the distance between the shaft of the rolling brush and the tunnel wall can be automatically adjusted in a certain range, for example40-50cm, so as to ensure the cleaning effect and safety.4. The author made some performance tests of the mechanical system and the obstacle avoidance system. The results show that the tunnel cleaning vehicle’s cleaning effect and efficiency are improved, and labor costs are reduced besides. The research has an important significance to improve the level of the tunnel cleaning’s mechanization and automation.