Rotary ring type steel arch installer matched with TBM (Tunnel Boring Machine)

The invention relates to the technical field of TBM steel arch mounting, in particular to a TBM matched rotary ring type steel arch mounting device which comprises an assembly rotary ring and a mounting frame which are sequentially arranged on a TBM main beam in a sleeving mode in the tunneling direction, and pushing mechanisms used for controlling the mounting frame to move are arranged on the two sides of the main beam. The mounting frame is provided with a tight supporting mechanism which can be connected with the annular arch frame from the assembly rotary ring to complete supporting; the assembling rotary ring comprises a circumferential inner gear ring and an arch frame fixing ring fixed to the periphery of the circumferential inner gear ring, driving mechanisms for driving the inner gear ring to rotate are arranged on the two sides of the top of the main beam respectively, the driving mechanisms are located on the left side and the right side in the circumferential inner gear ring, and the bottom of th