Drilling machine faucet of split structure

Abstract

The invention belongs to the technical field of engineering machines, and relates to a drilling machine faucet of a split structure. The faucet comprises a front mandrel, the axial end of the front mandrel is in threaded connection with a seal mandrel, the root of the front mandrel and the seal mandrel are sealed through a seal part, circumferential-direction locking rotation-prevention positioning between the seal mandrel and the front mandrel can be achieved through a locking screw, a front outer sleeve is supported on the front mandrel through two angular contact ball bearings, the axial ends of the two angular contact ball bearings are positioned through a shaft shoulder formed on the front mandrel, the other axial ends are positioned through the axial end face of the seal mandrel, theseal mandrel is sleeved with a connection rear outer sleeve, the faucet is reasonable and ingenious in structure, multiple sets of seal elements are adopted for combined seal, the seal property of the drilling machine faucet can be improved, due to the structural design of the mandrel and outer sleeve split connection of the drilling machine faucet, the faucet can be more rapid and convenient tomaintain, and meanwhile, the maintaining cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and relates to a drilling rig faucet with a split structure. Background technique [0002] The mud conveying system is an important part of the non-excavation horizontal directional drilling pipelay drilling rig, including mud pumps, mud conveying pipelines, drilling rig faucets, power head rotary spindles, drill pipes and drill bits, mainly responsible for conveying mud, flushing the bottom of the hole and cooling drill. Among them, the drilling rig faucet is a transition connection device between the mud delivery pipeline and the rotary spindle of the power head, so as to avoid distortion and deformation of the mud delivery pipeline following the synchronous rotation of the rotary spindle of the power head during the drilling process of the drilling rig. And the mud pressure that enters in the drilling rig faucet is very high, can reach more than ten MPa, in order to prevent the ...

AI Technical Summary

Problems solved by technology

However, during the drilling process of the existing drilling rig faucets, the sealing ring and the faucet mandrel are generally worn out, causing mud leakage and affecting the drilling efficiency. It is necessary to disassemble and replace the internal parts frequently, and the maintenance cost is correspondingly increased.

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