Jet-grouting drilling rig and drilling mechanism thereof
A drilling and drilling rig technology, applied in the field of drilling mechanism and rotary jet drilling rig, can solve the problems of low work efficiency, difficult to meet construction requirements, unsatisfactory shotcrete effect, etc., and achieve the effect of improving work efficiency and effect.
Inactive Publication Date: 2016-02-24
重庆九州探矿机械技术开发有限公司
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] See figure 1 , The drilling mechanism of the rotary jet drilling machine provided by the embodiment of the present invention includes a drill rod and a drill bit arranged at one end of the drill rod. The above-mentioned drill rod includes an outer drill rod and an inner drill rod arranged inside the outer drill rod, and a cavity through which air passes is formed between the two, so as to convey air while conveying slurry. Specifically, the outer drill...
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The invention discloses a jet-grouting drilling rig and a drilling mechanism thereof. The drilling mechanism comprises drill rods and a drill bit, wherein the drill rods comprise an outer drill rod and an inner drill rod, and a cavity is formed between the outer drill rod and the inner drill rod; the outer drill rod comprises a first outer joint, a second outer joint and a male rod arranged between the first outer joint and the second outer joint; and the inner drill rod comprises a first inner joint, a second inner joint and a core tube arranged between the first inner joint and the second inner joint, and each of the first inner joint and the second inner joint is provided with a through hole communicated with a middle hole of the core tube. When in use, air passes through the cavity and flows to the drill bit, and slurry can pass through the through holes and the middle hole and flows to the drill bit and is then jetted out of the drill bit. According to the drilling mechanism, the slurry is conveyed by the drill rods, and meanwhile, the air is conveyed to the drill bit, so that the slurry is mixed with the air when being jetted out. Therefore, under the action of the air, the slurry is jetted farther, thereby improving the slurry jetting effect and increasing the working efficiency of the drilling mechanism.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, and more specifically, relates to a drilling mechanism of a rotary jet drilling machine. In addition, the present invention also relates to a rotary jet drilling machine with the above-mentioned drilling mechanism. Background technique [0002] The rotary jet drilling rig is a drilling tool used to transport slurry, compressed air and clean water, etc., and can ensure continuous dynamic and static tightness under high-pressure working conditions. In the rotary jet drilling rig, the drill pipe is one of the key components, which can transport the slurry and transport the slurry to the drill bit for ejection. [0003] Existing drill pipes usually only transport the slurry. The slurry can flow to the drill bit through the through hole in the middle of the drill pipe. Under the action of pressure, the slurry can be ejected from the ejection port of the drill bit. The drill pipe is onl...
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IPC IPC(8): E21B7/18E21B17/18
CPCE21B7/18E21B17/18
Inventor 田虎刘小波
Owner 重庆九州探矿机械技术开发有限公司