Device for preventing blowout hole and casing pipe from moving downwards in underground drilling

Abstract

The utility model discloses an underground drilling blowout hole and casing downward movement prevention device which comprises a protection mechanism, the protection mechanism comprises a rectangular piece and a circular piece hinged to the middle position of the rectangular piece, and connecting pieces are installed on the two sides of the rectangular piece through screws; the outer side of the rectangular piece is connected with an outer frame through a connecting rod assembly, a blowout prevention net is installed on one side of the outer frame, a blowout prevention net opening is formed in the middle of the blowout prevention net, and the blowout prevention net opening and the circular pieces are arranged in a staggered mode. According to the protection mechanism, the protection mechanism is designed and installed on the drilling machine clamp holder, installation is firm, the casing pipe is put down from the round piece in the middle of the protection mechanism, the protection mechanism is further provided with the blowout prevention net, and by means of the protection mechanism, the accident that people are hurt due to the fact that the casing pipe moves downwards or pulverized coal in a hole rushes out can be effectively avoided; the safety risk of climbing operation for mounting a common safety protective net is avoided, the mounting time is saved, the labor efficiency is improved, and the labor intensity is reduced.

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