The invention discloses a device capable of automatically converting between a wire
barrel type polar plate and a barb
barrel type polar plate, and belongs to the electrostatic dust collection field. In order to solve the technical problems, the device consists of a particle sensor, a sampling
flue, an upper magnetic sensitive sensor, a
magnet, a left side wall of a
barrel-shaped dust collecting polar plate, a left side fixed rod, a
flue left side wall, a
flue inlet, barbs, a flue right side wall, a barb
discharge electrode, a linear
discharge electrode, a right side wall of the barrel-shaped dust collecting polar plate, a right side fixed rod, a traction
rope, a flue outlet, a
discharge electrode slide ring, a vertical supporting rod, a front half transverse supporting rod, a flue inner slide wheel, a flue inner slide wheel supporting rod, a channel tube, a
rope coiling box slide wheel, a motor retraction and extraction box, a
rope coiling box bottom plate, a rope coiling box, a rear half transverse supporting rod, a lower magnetic sensitive sensor, a
single chip microcomputer, a step retraction and extraction motor, a
resistor, a step
motor drive module and a rope coiling box slide wheel supporting rod. The device is characterized in that the particle sensor is connected with the flue left side wall through the sampling flue, wherein the upper magnetic sensitive sensor is connected with the flue left side wall. The device is mainly used for the electrostatic dust collection field.