Impact rotary jet grouting drilling tool

Abstract

The invention discloses an impact rotary jet grouting drilling tool. A rotating shaft assembly, a drill rod assembly and a spray nozzle drill bit assembly are sequentially connected; the drill rod assembly is of an inner-outer pipe double-layer structure, a first channel is formed between an inner pipe and an outer pipe, a central through hole of the inner pipe is a second channel; a water inlet and an air inlet are formed in the rotating shaft assembly, the water inlet communicates with the second channel, the air inlet communicates with the first channel; the spray nozzle drill bit assemblyis provided with a spray nozzle and a drill bit, a central channel of the spray nozzle communicates with the second channel, and outer channel communicates with the first channel; and an elastic one-way plugging structure is arranged between the spray nozzle and the drill bit. According to the impact rotary jet grouting drilling tool, after drilling is completed, a machining drilling machine doesnot need to be withdrawn, the drilling tool does not need to be replaced, rotary jet grouting construction can be carried out only by detaching the drill rod assembly from the rotating shaft assemblyand throwing one steel ball, guide hole drilling construction and rotary jet grouting construction can be completed through one set of drilling tool, the construction procedure is simple, the construction cost is low, the drill rod is convenient and rapid to detach, and the construction time is reduced.

Description

technical field [0001] The invention relates to the technical field of drilling rig equipment, in particular to an impact jet jet drilling tool. Background technique [0002] The rotary spraying construction method is to use a drilling rig to drill holes, and the slurry is sprayed out from the high-pressure nozzle at a high speed through a high-pressure generator to form a liquid flow with highly concentrated energy, which directly destroys the soil. As it is generally difficult for rotary grouting drilling rigs to directly penetrate the formations containing pebbles, rocks or sand, etc., when performing rotary grouting construction in these formations, it is generally necessary to carry out pilot hole construction first, and lower the PVC pipe in the drill hole to protect the wall , and then carry out rotary spraying construction; while conventional rotary spraying drilling rigs usually use diverters to transport different media (water, gas, slurry) to each channel of the d...

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Problems solved by technology

[0003] The applicant needs to use other drilling rigs to carry out the drilling construction for the above-mentioned existing rotary grouting drilling tools in strata containing pebble layers, rock layers or sand layers, and then remove the drilling rigs and then carry out the rotary grouting construction. The construction process More cumbersome, higher construction costs, longer construction hours and other shortcomings, to provide a reasonable structure impact rotary grouting drilling tool, use a set of drilling tools to complete the hole construction and rotary grouting construction, the construction process is simple, the construction cost is low, Short construction time

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