Automatic turning type middle groove welding device

The utility model relates to a device for fixing and automatically turning a middle groove during the middle groove welding and mainly solves the problems of positioning and automatic turning of each component during the middle groove welding. Because the assembly of channel steel, middle plates and bottom plates is realized by manual welding after marking out, the quality consistency is poorer, in addition, more than two workers are generally needed for lifting and turning during the middle groove surface replacement welding, and the work efficiency is greatly reduced. In order to solve the problems, the device has the technical scheme that the device is mainly divided into two parts including a support frame and a turning flat plate, the flat plate can turn around a shaft on the support frame, a positioning plate is used for positioning each welding component, and a fixing block is inserted for fixing the flat plate. The device has the advantages that the welding quality of each component of the middle groo