Dustproof device for anchor rod drilling

The dustproof device comprises a dustproof cover, a Laval nozzle, a connecting rod and an exhaust pipe, an air pipe is communicated with the outer wall of the upper portion of the dustproof cover, the connecting rod is communicated with the outer wall of the upper portion of the dustproof cover, the Laval nozzle is communicated with the connecting rod, and anchoring holes are formed in the circumferential edge of the bottom of the dustproof cover. Compared with the prior art, the dustproof device has the advantages that the drill rod is sleeved with the dustproof cover, the bottom of the dustproof cover is attached to the ground and anchored to the ground through the anchor nails, and therefore a large amount of dust generated in the anchor rod drilling process can be reduced, the fine filter screen is arranged on an outer opening of the exhaust pipe, soil particles with the large particle size can be intercepted, and the drilling efficiency is improved. The water pipe is connected with the Laval spray pipe,