Full-section spray device

The utility model relates to a full-section spray device which aims to solve the problems that an existing dust-falling spray device is not convenient to move, can not be repeatedly used, and easily leaks dust at the joint of top plates. The full-section spray device comprises a fixed seat and a spray pipe. The root of the spray pipe is connected to the fixed seat, nozzles are arranged on the end portion of the spray pipe, and the middle section of the spray pipe is provided with a high-pressure water pipe connector. The full-section spray device is characterized in that the end portion of the spray pipe is connected to the outer peripheral wall of a hollow disc, a plurality of nozzles are evenly distributed on the outer periphery of the hollow disc in a sunflower mode integrally, and the spray pipe and the nozzles are all communicated with the inner space of the hollow disc. The full-section spray device has the advantages that machining is convenient, the shape of a cross section of a tunnel does not need t