The application of high quality pipe inner wall sand-blasting especially
suction sand-blasting to the inner wall of long pipe is a difficult problem in surface
engineering field. It needs to take the lead in solving the two technical bottlenecks
of high efficiency sand-blasting and multi-runner rotary seal. The wind tunnel sand-
blasting gun improves the efficiency of suction sand-blasting, the double-flow two-
phase flow rotary sealing joint solves the problem of gas and material supply in
rotation, and the introduction of scanning mechanism finally realizes the engineering
significance of the automatic application of uniform and efficient sand-blasting on
the inner wall of long pipe. It provides advanced surface engineering equipment
with convenience, environmental protection, high quality and automation for the
pretreatment process of pipe inner wall painting, thermal spraying, electroplating and
vacuum coating in narrow space.