Drilling head capable of drilling into rock used for engineering pile
A technology of engineering piles and drill bits, which is applied in construction and other fields, can solve the problems of high air compressor requirements, high energy consumption, and high cost, and achieve the effects of fast rock entry, energy saving, and low cost and maintenance costs
Inactive Publication Date: 2013-07-24
阎慧奎
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Problems solved by technology
However, the large-diameter down-the-hole hammer and the down-the-hole hammer with the function of reaming are expensive, have high requirements on the air compressor, and consume a lot of energy, so the cost is the largest.
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[0009] The present invention will be further described below in conjunction with accompanying drawing, see figure 1 —4
[0010] This rock drilling bit includes a small-diameter down-the-hole hammer body 1 and an impactor 2, a pick 5 and a pick holder 4 for fixing the pick, and the spiral blade 3 when used as a long spiral drill bit for rotary excavation. The rotary drilling barrel 14 and the valve 13 connected with the pick when the machine bit is used for the disposable pick seat 6 and the pick 5 when there is a karst cave rock formation that needs to be drilled with the pipe. When used as a long helical drill bit, the small-diameter down-the-hole hammer body 1 and impactor 2 are located at the center of the drill bit, and the helical blade 3 is welded on the down-the-hole hammer body 1, and the bottom end of the helical blade 3 is welded with steel The pick seat 4 is equipped with a pick 5, the upper end of the DTH hammer body 1 is connected with the long auger rod, an...
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The invention relates to a drilling head capable of drilling into a rock used for an engineering pile. The drilling head comprises a small-diameter down hole hammer body and an impactor which are positioned at the center of the drilling head, cutting teeth and a cutting teeth and cutting teeth seats for fixing the cutting teeth, spiral blades used as a long spiral drilling head, a rotary digging and drilling barrel used as a rotary digging machine drilling head and valves connected with the cutting teeth; the spiral blades are welded on the down hole hammer body; the steel cutting teeth seats are welded at the bottom ends of the spiral blades; the cutting teeth are arranged on the cutting teeth seats; the down hole hammer body is connected with a spiral drilling rod; one spiral blade is connected with the other spiral blade on the spiral drilling rod; the small diameter down hole hammer body is positioned at the center of the rotary digging and drilling barrel and is fixed with the rotary digging and drilling barrel through welding; the cutting teeth seats are arranged at the bottom of the rotary digging and drilling barrel and are fixedly connected with the down hole hammer body and the rotary digging and drilling barrel; the cutting teeth seats are provided with the cutting teeth and are connected with the valves; and the upper end of the down hole hammer body is connected with the spiral drilling rod. The drilling head has the advantages of being high in speed, pollution-free and low in manufacturing cost when hard rock is drilled.
Description
technical field [0001] The invention belongs to the field of engineering machinery, in particular to a rock-entrying drill bit used for engineering piles. Background technique [0002] Bored piles are currently the most widely used type of pile foundation. When the load-bearing requirements of a single pile are large, many pile foundations are required to enter hard rock formations such as middle weathering or slight weathering. At present, in the construction of engineering piles, drilling into the hard rock layer mainly includes impact holes, rotary drilling rigs, and down-the-hole hammer drilling rigs. Impact drilling relies on the impact of the gravity head on the rock to crush the rock to form a hole. This method is slow and pollutes a lot; the rotary drilling rig forms a hole by grinding the rock on the pick on the rotary drilling bit. This method is efficient. Compared with percussion drilling, the hole-making performance is greatly improved, but the speed of drillin...
Claims
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IPC IPC(8): E21B10/43
Inventor 阎慧奎常国栋
Owner 阎慧奎