Opening-closing type salvaging device for drilled pile drill bits

Abstract

The invention discloses an opening-closing type salvaging device for dilled pipe drill bits. A housing is a thin-wall cylindrical tapered barrel; a limiting rod passes through from a housing; an upper limiting bolt and a lower limiting bolt are welded on the limiting rod; four rod outlet windows are vertically formed in the side wall of the housing; two connecting rods are separately welded horizontally in two vertical inside centers of the rod outlet windows; guide slide sleeves are hinged between the two connecting rods in the rod outlet windows by taking the side wall as the center; a limiting slide sleeve is arranged between the upper limiting bolt and the lower limiting bolt of the limiting rod; movable rods are connected to the limiting slide sleeve in a manner of enabling a fixing rod to pass through a horizontal hole; the four movable rods on the limiting slide sleeve separately pass through four guide slide sleeves in corresponding directions to get out from the housing. The limiting slide sleeve upwards slides along the limiting rod, the movable rods are opened and the limiting slide sleeve downwards slides along the limiting rod, so that the movable rods are closed. The device realizes multi-angle all-around salvaging work for multiple drill bits in drilled holes and karst caves, and has great significance on improving the technical level of pile foundation construction.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in building and bridge engineering, in particular to an open-and-close drill bit salvage device for bored piles, which is suitable for handling accidents such as drill bit drop and drill pipe breakage in boreholes when drilling rigs are used for bored pile construction. bored pile drill bits for salvage. Background technique [0002] Bored piles are widely used in foundation construction projects such as municipal construction, highway bridges, high-rise buildings, docks and embankments. Drilling equipment is mainly circular drilling rigs and rotary drilling rigs. During the process of drilling piles, due to changes in geological conditions, poor quality of flange connections, unstable drilling rigs, swinging of drill bits, and negligence in human operation, etc., drills often occur. When the rod is detached, the drill pipe breaks and the drill bit falls off to the bottom of ...

AI Technical Summary

Problems solved by technology

[0003] Existing methods and equipment for salvaging drill bits often have certain defects. For example, using a crane to carry a hook to salvage is not only time-consuming, but the hook grabbing the drill belt or support plate will cause the bit to tilt eccentrically and cause the hole to be stuck; It will also take a long time to punch the dropped drill into small pieces, and then use the magnet to suck out the iron slag, and there is a risk of serious accidents in the hole during the percussion drilling process

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