Cold and hot separation double-layer sleeve type spray desuperheater

The utility model belongs to the technical field of desuperheaters, and particularly relates to a cold and hot separation double-layer sleeve type water spraying desuperheater which comprises a pipe body and a water spraying pipe, the left end of the top of the pipe body is communicated with an upper pipe, and a top pipe is installed in the upper pipe from top to bottom. The upper ring is rotationally connected with the lower ring correspondingly, the bottom of the lower ring communicates with a water spraying pipe, and a plastic pipe is embedded in the water spraying pipe. The plastic pipe is nested corresponding to the water spraying pipe, the upper ring rotates and moves downwards on the stud and is connected with the lower ring in a clamped mode, so that the lower ring is connected with the water spraying pipe, the water spraying pipe is convenient to disassemble, meanwhile, cold and hot alternate media are converted into the plastic pipe, and compared with metal, the plastic pipe is better in aging resis