Compressed air pipeline joint device for improving insulation of rainwater pump motor coil

The utility model discloses a compressed air pipeline joint device for improving rainwater pump motor coil insulation, which comprises a main fixing pipe and an auxiliary fixing pipe, the surfaces of the main fixing pipe and the auxiliary fixing pipe are fixedly provided with clamping rings, the outer ring surface of each clamping ring is in threaded connection with a threaded column, the threaded end of each threaded column is rotationally connected with a gear ring through a bearing, and the gear ring is in threaded connection with the clamping ring. Telescopic grooves are formed in the surfaces of the main fixing pipe and the auxiliary fixing pipe correspondingly, the surface of the gear ring is slidably connected with the interiors of the telescopic grooves, and connecting pipes are fixedly installed on the inner walls of the main fixing pipe and the auxiliary fixing pipe correspondingly. A toothed ring is arranged, a compressed air pipe is connected with a main fixing pipe, a purging hose is connected wi