A power head structure for horizontal directional drilling rig

Abstract

The invention discloses a power head structure for a horizontal directional drilling machine, and belongs to the technical field of horizontal directional drilling machines. On the basis of an original structure, a cover body (9) is additionally arranged, the cover body (9) is arranged on the outer side of a power head main shaft (16), the front end of the cover body (9) is installed at the rear end of a power head box body (15), the center of a rear base plate is provided with a circular installation hole, meanwhile, a connecting shaft (18), a V-type combined sealing ring (19), a pressing flange (10) and a central spindle (8) are further arranged in the cover body (9), and the connecting shaft (18), the V-type combined sealing ring (19), the pressing flange (10) and the central spindle (8) are sequentially installed between a slime pump input connector (4) and the power head main shaft (16). According to the power head structure, the power head main shaft (16) is guaranteed to slide in a front-and-back mode relative to the power head box body (15), meanwhile, the position of the slime pump input connector (4) is fixed, slime in a slime input soft pipe (3) installed on the slime pump input connector (4) is guaranteed to be smoothly delivered, the phenomena of buckling and even breaking caused by non-timely movement in the original structure are avoided, and the construction progress is ensured.

Description

technical field [0001] The invention relates to a rotary joint, in particular to a power head structure for a horizontal directional drilling machine, and belongs to the technical field of the horizontal directional drilling machine. Background technique [0002] Horizontal directional drilling rig is a construction machine for laying various underground utilities (pipelines, cables, etc.) without excavating the ground surface. It is widely used in pipeline laying construction for water supply, electricity, gas, oil, etc. During the construction of the drilling rig, in order to achieve the purpose of supporting the hole wall, lubricating the drill pipe, suspending drill cuttings, and reducing construction resistance, etc., it is necessary to continuously transport mud to the drill pipe to the drill bit, and as the main part of mud transportation, the mud input soft Whether the inside of the pipe can be kept unobstructed is one of the important factors for whether the horizon...

AI Technical Summary

Problems solved by technology

The above-mentioned structure can reduce the wear of the drill pipe thread, but when the underground situation is more complicated and the demand for mud is large, the mud input hose needs to be made thicker, and the gravity of the mud in the pipe will cause the mud input hose to appear. With the movement of the main shaft of the power head, bending or even breaking occurs, which hinders the timely delivery of mud, resulting in the failure of the normal operation of the horizontal directional drilling machine and affecting the construction progress

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