Combined drill bit used for cast-in place pile
The utility model provides a combined drill bit used for a cast-in place pile, belonging to the field of building equipment and solving the problems in the prior art that a three-wing drill bit has difficult drilling and big construction difficulty, and a drum drill bit has slower drilling speed. Th...
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| creator | ZHANG XUEXING ZHOU HAIJUN CHEN RIXIN JIN CHONGZHENG RUAN GUANHUA |
| description | The utility model provides a combined drill bit used for a cast-in place pile, belonging to the field of building equipment and solving the problems in the prior art that a three-wing drill bit has difficult drilling and big construction difficulty, and a drum drill bit has slower drilling speed. The combined drill bit comprises a center rod, wherein the rear end of the center rod is used for connecting a power source that can lead the center rod to rotate; the middle part of the center rod is fixedly provided with a prismaid-shaped cutter rest taking the center rod as the center; the cutter rest becomes bigger gradually from front to back; and a plurality of drilling cutters 1 are fixedly arranged on the cutter rest. The combined drill bit is characterized in that the front end of the center rod is fixedly provided with a cylindrical drill drum; the size of the outer end surface of the drill drum is less than that of the front end surface of the cutter rest; and a plurality of drilling cutters 2 positioned o |
| format | Patent |
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The combined drill bit comprises a center rod, wherein the rear end of the center rod is used for connecting a power source that can lead the center rod to rotate; the middle part of the center rod is fixedly provided with a prismaid-shaped cutter rest taking the center rod as the center; the cutter rest becomes bigger gradually from front to back; and a plurality of drilling cutters 1 are fixedly arranged on the cutter rest. 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| language | chi ; eng |
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| subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
| title | Combined drill bit used for cast-in place pile |
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