The roller surface of high-speed paperboard production line heats up quickly and has high heat transfer efficiency. The rotary joint is required to have high temperature, high speed, high pressure, anti-corrosion and anti rust performance, and the inner tube concentricity and the sealing effect between steam inlet and water return are very strict. In order to keep up with the market demand and provide supporting services for the upstream and downstream manufacturers of corrugated industry, Wenxing Shi and others began to develop and design special rotary joint for high-speed paperboard line in 2015, which is applied to the core part of single side machine of corrugated board production line - peripheral heating corrugated roller. The project design adopts the form of external support, which can effectively reduce the load acting on the sealing surface and reduce the wear of the sealing ring; The internal use of imported seals and anti spherical structure can effectively improve the pressure bearing capacity of the seal ring and the wear resistance of high-speed rotation; It adopts multi spring structure, elastic compensation, stable external support, suitable for high-speed rotating conditions, and the spring does not contact with the medium, which can effectively protect the service life of the spring. This design makes the rotary joint not affected by three kinds of shaking and jumping caused by high-speed operation of steam inlet pipe, water return pipe and inner pipe, which can effectively ensure the sealing reliability of the product and prolong the service life. At present, this series of products can withstand high temperature 235 ℃, the maximum speed of 400rpm, the maximum pressure of 2.5MPa, and the technical parameters are leading in the domestic similar products.