Tower crane rotation angle control device

The utility model provides a tower crane rotation angle control device which comprises an upper blocking device, a connecting plate, a lower blocking device and a lifting point lug plate, the upper blocking device is connected with the connecting plate in a welded mode, the lower blocking device is connected with the connecting plate in a welded mode, and the lifting point lug plate is connected with the connecting plate in a welded mode. The lower blocking device is connected with the lower rotation pin shaft, the upper blocking device is tightly attached to the upper rotation pin shaft and installed at the four corners of the tower crane, and therefore the relative position and the installation size are controlled to meet the installation requirement of the tower crane all the time, installation is firm, disassembly is convenient, and repeated turnover use can be achieved. 本实用新型提供了一种塔机回转角度控制装置，包括上阻挡装置、连接板、下阻挡装置和吊点耳板，所述上阻挡装置与连接板通过焊接连接，所述下阻挡装置和连接板通过焊接连接，所述吊点耳板与连接板通过焊接连接，本实用新型通过通过下阻挡装置与下回转销轴连接，上阻挡装置紧贴上回转，在塔机的四