Wellhead screwing and unscrewing device of rescue truck-mounted drilling rig for coal mine and electric control system

Abstract

The invention discloses a wellhead screwing and unscrewing device of a rescue truck-mounted drilling rig for a coal mine and an electric control system. The wellhead screwing and unscrewing device of the rescue truck-mounted drilling rig for the coal mine is provided with screwing and unscrewing pincers, wherein the screwing and unscrewing pincers are composed of clamping pincers and unscrewing pincers which are coaxially stacked, and a drilling rod is unscrewed through the clamping pincers and the unscrewing pincers which rotate relatively in the circumferential direction; buckle twisting pincers are arranged in parallel in the axial direction, and the buckle twisting pincers conduct continuous buckle twisting on the unscrewed drilling rod. The whole structure is light, the size is small, and small-platform operation can be adapted; according to a three-degree-of-freedom double-feeding moving frame, a first-stage moving frame and a second-stage moving frame can independently and horizontally move along a first-stage horizontal guiding rail and a second-stage horizontal guiding rail to remove an orifice, and the passing ability requirement of a double-wall drilling tool gas box is met; the buckle twisting pincers and the screwing and unscrewing pincers can move up and down along vertical guiding rails to find a seam of a drilling tool; a synchronous connecting rod design is adopted in left front arms and right front arms of the buckle twisting pincers, so that the left front arm and the right front arm synchronously move, and the drilling tool is reliably clamped.

Description

technical field [0001] The invention belongs to the field of automatic unscrewing devices for mines, and in particular relates to a wellhead unscrewing device and an electric control system for a rescue vehicle-mounted drilling rig used in coal mines. Background technique [0002] At present, the coal mining process in our country is accompanied by the occurrence of coal mine accidents. After the accident, the miners are trapped underground, the safety passage is blocked, and the rescuers cannot approach the disaster area, and the trapped people are facing life-threatening. In order to rescue the trapped miners as soon as possible, it is generally used to rescue the trapped miners by using precise small-diameter drilling to deliver supplies and large-diameter drilling to build an escape channel for transfer. At present, the general problems of unscrewing devices for large-diameter drilling tools are that the structural size is too large, the breakout ability is weak, and uns...

AI Technical Summary

Problems solved by technology

At present, the general problems of unscrewing devices for large-diameter drilling tools are that the structural size is too large, the breakout ability is weak, and unscrewing is difficult, which cannot meet the unscrewing tasks of various specifications of drilling tools and the traditional drilling and hydraulic elevator drilling. process requirements

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