Dust collection device for cutting insulating pipe

A sliding seat is slidably connected to an air suction cover, an air inlet groove is formed in the upper end face of the air suction cover in the sliding direction of the sliding seat, rubber sheets are fixed to the two sides of the air inlet groove in the length direction, a magnetic attraction strip is arranged on the inner wall face of each rubber sheet, and the two rubber sheets attract each other through the magnetic attraction strips. The air inlet groove is formed in the sliding seat and seals the air inlet groove, the air nozzle is fixed to the sliding seat, the bottom end of the air nozzle penetrates through the position between the two rubber skins and extends into the air suction cover, the corrugated hose is fixed to the sliding seat, and the corrugated hose is communicated with the air nozzle. The air receiving pipe is connected with an air blower, so that negative pressure is formed in the air suction cover, when the gantry sawing machine cuts a resin insulation pipe, the corrugated hose sucks r