Drilling bit for municipal public engineering

Abstract

The invention belongs to the technical field of municipal drilling, and particularly relates to a drilling bit for municipal public engineering. The drilling bit comprises a gear ring, a ring shaft, agear ring side wall, a supporting top cover, a motor, a ring gear, a motor rotating shaft, an inner ring, a clamping block, a clamping block inner block, an outer ring, an ejecting block and a centrifugal block. According to the drilling bit for the municipal public engineering, a circle guide ring is used between the inner ring and the outer ring so that the outer ring and the inner ring can rotate relatively, when an inner drill is stuck, the clamping block and the ejecting block cooperate with each other so that a ring drilling shell can rotate in the reverse direction with great power toenable the bottom of a well to be subjected to sidetracking from an outer circle until looseness, so that the inner drill gets out of the stuck state easily; and when the ring drilling shell is stuck,the ring drilling shell can limit the rotation of the inner drill, and at the same time, the inner drill loses power and the ring drilling shell obtains more power and rotates in the reverse direction to enable the bottom of the well to be subjected to sidetracking from the outer circle until looseness, so that the inner drill and the ring drilling shell restore to the original rotation state easily. The drilling bit can be automatically released from the stuck state through the reverse rotation of the ring drilling shell and has a good use effect.

Description

Technical field [0001] The invention belongs to the technical field of municipal drilling, in particular to a drilling bit for municipal public works. Background technique [0002] At present, for drill bits, most of the drill bits used for drilling are integrally cast or forged. For the drilling of rock layers with different hardness at different depths, either a single hard drill bit or real-time replacement of the drill bit according to the drilled rock layer has reached purpose of drilling. Both of these have certain problems. For the former, the drill bit is more or less worn when drilling the softer rock layer. The cost is high, which is not cost-effective; for the latter, it is necessary to use frequent replacement of the drill bit to increase the time cost, and for rocks that are harder than the hard drill bit, it is very easy to cause the drill bit to be stuck. When the drill bit is stuck, the motor’s Rotation will prompt the drill bit to continue to rotate, resul...

AI Technical Summary

Problems solved by technology

Both of these have certain problems. For the former, the drill bit is more or less worn when drilling the softer rock layer. The cost is high, which is not cost-effective; for the latter, it is necessary to use frequent replacement of the drill bit to increase the time cost, and for rocks that are harder than the hard drill bit, it is very easy to cause the drill bit to be stuck. When the drill bit is stuck, the motor’s Rotation will prompt the drill bit to continue to rotate, resulting in hard damage to the drill bit. At this time, a higher hardness drill bit is required. For drilling workers, using a softer drill bit to drill softer, harder or harder rocks can greatly improve operating efficiency. of

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