Method for realizing extension and contraction of down-the-hole drilling arm of full hydraulic drill carriage

Abstract

The invention discloses a method for realizing extension and contraction of a down-the-hole drilling arm of a full hydraulic drill carriage. The down-the-hole drilling arm of the full hydraulic drillcarriage is composed of four segments of square pipes in a sleeving mode, drill rod support is arranged at the front end of the fourth segment of square pipe, a hydraulic cylinder is mounted in the fourth segment of square pipe, a first steel wire rope is fixed to a fixed shaft of the first segment of square pipe, and a second steel wire rope is fixed to a second sliding wheel shaft. When a telescopic rod of the hydraulic cylinder is operated to extend, the second segment of square pipe is pushed out, the third segment of square pipe is pulled out by the first steel wire rope while the secondsegment of square pipe is pushed out, and when the third segment of square pipe is pulled out, the second steel wire rope pulls out the fourth segment of square pipe, so that the four segments of square pipes of the drilling arm extend simultaneously; and during contraction, the contraction is realized through a hydraulic winch arranged at the rear end of the first segment of square pipe. According to the method for realizing the extension and contraction of the down-the-hole drilling arm of the full hydraulic drill carriage, a drill rod is not hung in the air any more during drilling starting, drill rod shaking is reduced, positioning is easy, and position running and inclined drilling are prevented, so that a hole reaches the standard.

Description

technical field [0001] The present invention relates to a drilling rig. Background technique [0002] The full-hydraulic drilling rig currently used (for example, CN104612586A is used for the full-section rapid drilling rig of the large empty hole straight eye cutting blasting in the roadway) is provided with two drilling arms to work simultaneously. One of the drill arms is a down-the-hole drill used to drill large holes with a diameter of 100mm. Due to the limited design space of the drilling rig, its length is only about 2 meters; the other drill arm is used for ordinary rock drills with a diameter of 32- 42mm expansion slot and peripheral holes. In order to meet the one-time advance distance of the expanded slot hole and the peripheral hole, the drilling rig needs to be parked more than 5 meters away from the front, resulting in the DTH drilling arm being too far away from the drilling face when drilling a large hole, and the suspended length of the drill pipe is too lo...

AI Technical Summary

Problems solved by technology

In order to meet the one-time advance distance of the expanded slot hole and the peripheral hole, the drilling rig needs to be parked more than 5 meters away from the front, resulting in the DTH drilling arm being too far away from the drilling face when drilling a large hole, and the suspended length of the drill pipe is too long , the drill pipe swayed greatly, making it difficult to fix the drilling position, and because the surface of the downhole head is not flat, the drill bit is easy to move when rotating and drilling, causing the drilling to deviate, the hole position is not standard, and the drill pipe also wears the hole wall. make holes non-standard

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