Step-down Transmission Line Project of Commercial Aircraft Corporation of China(COMAC)

Project Introduction

The 110KV step-down transmission line project is a supporting project for Manufacturing Base of COMAC. The base covers an area of above 2.67 million M² and its entire construction area is about 1.15 million M2. The whole project is under direct management of Shanghai Government. It is required that this project be completed in a tense timely manner and the output have aesthetic appearance with high quality. Huitong has participated in the project from the initial design stage of steel poles. There were two special demands required by this project.
1. The diameters of steel poles should be as small as possible.
2. Plastic-spraying should be applied to steel poles after galvanizing.

As for the first demand, when diameters of steel poles are reduced, the thickness must be increased to ensure the strength. Therefore, the amount of raw materials raised significantly, which resulted in more difficulties in purchasing and processing raw materials. After repeated calculations and professional verifications, an optimal ratio of the diameter to thickness was determined to ensure satisfying performance with lower manufacturing cost. Meanwhile, it was in line with the availability of raw materials and the feasibility of manufacturing.

It is the main technical difficulty in this project that plastic-spraying should be applied to steel poles after galvanizing. After galvanizing, the surface of the steel pole is smooth so that the plastic-spraying layer has little adhesion. There was no precedent within the industry. To overcome this obstacle, Huitong cooperated with well-noted plastic-spraying entity. After large amounts of experiments, we broke through this difficulty and realized innovations in both technics and equipment. The output was well-commented by our customers.

For further information, please contact us→