Air distribution anti-swiveling device for combination type down-the-hole hammer reverse circulating method

Abstract

The invention provides an air distribution anti-swiveling device for a combination type down-the-hole hammer reverse circulating method. The device mainly comprises an upper square head, a core pipe, a clamp plate, rollers, a front linkage rod, a rear linkage rod, a spring, a spring linkage rod, a spring linkage rod base, a regulating nut, an air inlet hole, a shell, a seal ring, a rotating innershell, a lower square head and a bearing, wherein one ends of the front linkage rod and the rear linkage rod are respectively hinged with the shell, the other ends of the front linkage rod and the rear linkage rod are hinged with the clamp plate, two ends of the clamp plate are bent toward the radial direction of a shaft and hollow, and the freely-rotating rollers are arranged in the clamp plate;one end of the spring linkage rod is hinged with the outer side of the front linkage rod and penetrates through the two outer sides of the rear linkage rod, the other end of the spring linkage rod isconnected with the spring linkage rod base through the regulating nut, and the spring linkage rod base is hinged with the shell; and the spring linkage rod penetrates through the spring, and a bottomend thread part penetrates through an unthreaded hole on the spring linkage rod base. The invention has the advantages that a parallelogram linkage rod mechanism is adopted, the structure is reasonable and reliable, and the series work diameter reaches 800-2200 millimeters; and an air distribution pipe of the combination type down-the-hole hammer can be prevented from being twisted with a telescopic drill rod in the hole.

Description

technical field [0001] The invention relates to an air distribution and anti-rotation device used in the reverse circulation construction method of a combined down-the-hole hammer. Background technique [0002] When the combined down-the-hole hammer is used in conjunction with the telescopic drill pipe, the air distribution method becomes a difficult problem because of the reverse circulation method. The combined down-the-hole hammer needs both continuous rotation and downward drilling movement, and its air distribution pipe is difficult to realize this function at the same time. In order to use the combined down-the-hole hammer to perform reverse circulation drilling operations in complex formations and hard formations, an overhead drill pipe or a non-continuous rotation method is now used, thus reducing work efficiency. Contents of the invention [0003] The technical problem to be solved by the present invention is to realize the continuous rotary gas distribution of t...

AI Technical Summary

Problems solved by technology

The combined down-the-hole hammer needs both continuous rotation and downward drilling movement, and its gas distribution pipe is difficult to achieve this function at the same time

In order to use the combined down-the-hole hammer to perform reverse circulation drilling operations in complex formations and hard formations, the overhead drill pipe or the non-continuous rotation method is now used, thus reducing the work efficiency

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