1results about How to "Achieve effective use" patented technology

The hole protecting device comprises a protective cylinder and a protective hopper, one end of a cylinder body of the protective cylinder is inserted into the blast hole, the outer wall of the cylinder body is tightly attached to the inner wall of the blast hole, and the other end of the cylinder body is provided with a positioning step aligned with an orifice of the blast hole; the protection bucket seals a casing body at the end, located at a blast hole opening, of the casing, the bottom of the protection bucket is a positioning funnel embedded with the end of the casing, the conical outer wall of the positioning funnel is provided with a plurality of segmented elastic clamping plugs distributed in a stepped mode in the axial direction, and the positioning funnel is embedded with an opening in the end of the casing in an extruding mode through one segment of the segmented elastic clamping plug. And the elastic clamping plugs are abutted against the end part of the pile casing through steps between the segmented elastic clamping plugs. The protective cylinder and the protective hopper are of a split structure, the protective hopper can be well matched with the protective cylinders of various sizes, the use cost of the hole protecting device is reduced, efficient hole opening protection of the open blasting hole is achieved, charging construction of the blast hole can be assisted, and reliability and safety of open blasting hole construction are improved.