A rock-breaking mechanism combined with pulse jet and mechanical impact

Abstract

Disclosed is a pulse jet flow and mechanical shock joint rock-breaking mechanism, comprising a guide rail (1), a propulsion cylinder (2), a hydraulic impact power head (3), a drill rod (4), a drill bit (5), a dynamic seal combination sleeve (6), a static seal transition sleeve (7), an elastic retaining ring (8), a static seal ring (9), a dynamic seal ring (10), and a drill rod support base (11); the cylinder body of the propulsion cylinder (2) is hinged to the guide rail (1), and a piston rod of the propulsion cylinder (2) is hinged to a shell of the hydraulic impact power head (3), the hydraulic impact power head (3) being slidably arranged on the guide rail (1), an input shaft (3-1) of the hydraulic impact power head (3) being connected to one end of the drill rod (4) by means of a screw thread, the other end of the drill rod (4) being connected to the drill head (5) by means of a screw thread, the connecting sites of the output shaft (3-1) of the hydraulic impact power head (3) with the drill rod (4) and the drill rod (4) with the drill head (5) both being provided with a static seal transition sleeve (7); an outer sleeve of the dynamic seal combination sleeve (6) being screwed onto the shell of the hydraulic impact power head (3), and an inner sleeve of the dynamic seal combination sleeve (6) being screwed onto the outer sleeve of the dynamic seal combination sleeve (6). The present mechanism has a compact structure, a simple, reliable, and easily replaceable sealing structure, and a strong rock-breaking capability.

Description

technical field [0001] The invention relates to a rock breaking mechanism combined with pulse jet flow and mechanical impact, which is most suitable for drilling or breaking rocks with high Platinum hardness coefficient. Background technique [0002] In 2015, the "BP World Energy Statistical Yearbook" pointed out that China is still the world's largest energy consumer, accounting for 23% of global consumption and 61% of global net growth; coal resource consumption accounts for 66.03% of total consumption, and in the future For a long period of time, it has an irreplaceable position as the main energy source in our country. The "National Medium- and Long-Term Science and Technology Development Program (2006-2020)" clearly points out that it is urgent to strengthen research on safe and efficient mining and utilization of coal resources, and clearly requires research on deep and complex strata ore body mining technology. In 2011, the "National Energy Science and Technology "Tw...

AI Technical Summary

Problems solved by technology

At present, two methods of mechanical cutting and impact are mainly used for underground coal and rock drilling. When mechanical cutting breaks rock, the tool wears seriously and consumes a lot. It is mainly used for cutting and breaking coal and rock with Platinum hardness coefficient f≤8; mechanical impact can break Most coal rocks, but when working in hard coal rocks (f>15), there are problems such as serious wear and shedding of the buttons, low rock breaking efficiency and large amount of dust, which greatly reduces the mechanical impact rock breaking ability, efficiency and service life of the equipment How to achieve safe and efficient crushing of hard coal and rock has become a key issue and difficulty in the efficient development of deep and complex coal and other ore body resources

[0004] High-pressure water jet rock breaking is a coal and rock crushing technology that uses high-speed "water arrows" to impact, break and erode. The water volume meeting caused a large area of ​​water accumulation in the workplace of coal and rock crushing machinery, making it difficult for the equipment to work normally

The common continuous water jet assisted rock breaking only produces a single "water hammer pressure", which has limited impact rock breaking ability, and the subsequent low "stagnation pressure" is difficult to aggravate the internal damage and crack propagation of hard coal and rock, resulting in its failure in hard coal rock. Widely used in coal and rock crushing equipment

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