Spraying device for thermal insulation pipe production

The utility model relates to the field of metal calendaring, in particular to a spraying device for thermal insulation pipe production. The spraying device for thermal insulation pipe production comprises a support, a clamping plate installed on the surface of the support, an inner gear clamped in the clamping plate, a fixed gear meshed with the inner gear, one end of a fixed rack fixed on the surface of the inner gear, and a sliding plate connected to the rack in a sliding mode. A spraying head is fixed on a bottom plate of the sliding plate; the spraying device has the beneficial effects that the two groups of convex clamping shafts are arranged at the two ends of the thermal insulation pipe, the two groups of electric telescopic rods drive the two groups of clamping shafts to move towards the middle, and the bosses of the clamping shafts are clamped on the inner side of the thermal insulation pipe, so that the thermal insulation pipe is fixed, and the situation that the spraying quality is influenced due t