Multi-branch parallel device for electrostatic spraying of epoxy resin coating composite steel pipes for underground coal mine

The device comprises a base, a plurality of guide rods are fixed to the upper end of the base, the circumferential side walls of the guide rods are jointly connected with a horizontal plate in a sliding mode, and a plurality of electric telescopic rods are fixed to the upper end of the base; rod heads of the multiple electric telescopic rods are fixed to the bottom of a horizontal plate, multiple supporting rings are fixed to the upper end of the base, the upper end of each supporting ring abuts against a steel pipe body, multiple spraying devices are arranged at the bottom of the horizontal plate, and each steel pipe body is sleeved with an annular block. The spraying device has the advantages that by means of the annular block and the disc arranged inside and outside the steel pipe body, the interior and the exterior of the steel pipe body can be sprayed at the same time in the horizontal plate and raw material pumping process, and the interior and the exterior of the steel pipe body can be completely spray