Drill rod positioning device and method for split disassembly and assembly type cast-in-place pile drilling machine for limited space

Abstract

The invention relates to a drill rod positioning device and method for a split disassembly and assembly type cast-in-place pile drilling machine for a limited space. The device comprises a split type fixing base installed on a drilling machine bottom frame, a clamping jaw type drill rod positioning device installed on the fixing base and a control system, the clamping jaw type drill rod positioning device comprises a rotary oil cylinder and a clamping jaw rocker arm, clamping jaw rocker arms which are trisected along the circumference are arranged in the split type fixing base and used for clamping and fixing a drill rod, the tail portion of each clamping jaw rocker arm is provided with a rotary center shaft and connected with the rotary oil cylinder, the rotary oil cylinder drives the clamping jaw rocker arms to rotate around the rotary center shafts, and the head portions of the clamping jaw rocker arms are connected with a head rolling shaft through a head core shaft. The device can be used for drilling machines and matched machines and tools, and has the characteristics of light and small structure, flexible operation, reliable work and multiple functions.

Description

technical field [0001] The invention relates to a special special-purpose equipment auxiliary tool in the field of foundation reinforcement, in particular to a set of detachable and detachable cast-in-place pile drilling rig drill pipe positioning devices for underground space development and utilization of a group of space-limited cultural relics protection buildings. Background technique [0002] The ground reinforcement for the development and utilization of the underground space of the cultural relics protected buildings with limited space requires a special split-type cast-in-place pile drilling machine. Threaded or inner flange type small-diameter drill pipe has poor effect of cleaning sandy soil at the bottom of the hole, and replacing with special hole cleaning equipment will have low work efficiency and will also affect the quality of the formed holes; for example, using outer flanges The drill pipe of the same diameter in the form of a joint can maximize the diamet...

AI Technical Summary

Problems solved by technology

[0002] The foundation reinforcement of the underground space development and utilization of the cultural relics protection buildings with limited space requires a special split disassembled cast-in-place pile drilling rig. Threaded or inner flange drill pipes with small diameters have poor cleaning effect on sandy soil at the bottom of the hole. If special hole cleaning equipment is used instead, the work efficiency will be low and the quality of the formed holes will be affected; if an outer flange is used The same-diameter drill pipe in the form of joints, under the condition of basically the same self-weight, the diameter is maximized to meet the hole cleaning requirements of sandy soil at the bottom of the hole

However, the drill pipe connected in the form of an outer flange is used, and the diameter of the connecting flange and the drill pipe pipe are inconsistent, which brings great trouble to the radial positioning of the drill pipe when it feeds. In order to solve this contradiction, it is necessary to design a drill pipe The positioning device is used to meet the requirements of low headroom and narrow plane space. When the bored piles for foundation reinforcement are formed into holes, the vertical accuracy and quality of the holes are guaranteed.

Images