Drilling orifice dust falling device

The utility model relates to a dust falling device for a drilling hole opening, which belongs to the technical field of dust prevention and comprises a dust collecting barrel (1), a dust collecting pipe (2) and a drilling rod (3). The drill rod (3) is inserted into the dust collecting cylinder (1); a sealing opening (4) is formed in the tail end of the dust collecting barrel (1), and a drill rod channel (5) for allowing a drill rod (3) to pass through is formed in the sealing opening (4); the dust suction pipe (2) is communicated with the dust collection barrel (1); the tail end of the dust suction pipe (2) is connected with a dust collection device; according to the utility model, not only can dry punching be ensured, but also dust can be effectively prevented from diffusing into air in a working space during punching. 本实用新型涉及一种钻孔孔口降尘装置，属于防尘技术领域，本实用新型包括收尘筒（1）、吸尘管（2）、钻杆（3）；所述钻杆（3）插入收尘筒（1）内；所述收尘筒（1）的末端设有封口（4），所述封口（4）上开设有用于使钻杆（3）通过的钻杆通道（5）；所述吸尘管（2）与收尘筒（1）连通；所述吸尘管（2）的末端连接有收尘装置；本实用新型即能保证干打，又能有效防止打孔时粉尘扩散到工作空间空气中。