Ultrahigh-pressure rotary pulse water jet rock breaking mechanism

Abstract

The invention discloses an ultrahigh-pressure rotary pulse water jet rock breaking mechanism which comprises a water jet cutting head, a rock breaking mechanism shell and a cutting spindle. The cutting spindle is arranged inside the rock breaking mechanism shell, the front end of the cutting spindle is connected with the water jet cutting head, the rear end of the cutting spindle is connected with a driving device, a central water channel is arranged inside the cutting spindle by means of machining, the driving device comprises a speed reducer and a hydraulic motor, a booster cavity is arranged at the rear end of the central water channel, a booster piston rod is arranged in the booster cavity, a large-diameter end of the booster piston rod is matched with the booster cavity, a rod of the booster piston rod is matched with the central water channel, an annular cavity is formed between an outer circle of the rod of the booster piston rod and the inner wall of the booster cavity, a water inlet channel and a water outlet channel are arranged at the rear end of the cutting spindle, a high-pressure rotary sealing guide sleeve is arranged between the rear end of the cutting spindle and the rock breaking mechanism shell, a water inlet groove and a water outlet groove are formed in the high-pressure rotary sealing guide sleeve, and the rock breaking mechanism shell is provided with a high-frequency electromagnetic reversing valve. The ultrahigh-pressure rotary pulse water jet rock breaking mechanism has the advantages of compact structure, low water consumption and high rock breaking capacity.

Description

technical field [0001] The invention relates to coal seam roadway excavation equipment, in particular to an ultra-high pressure rotating pulse water jet rock-breaking mechanism suitable for tunneling construction of difficult-to-mine coal seam roadways. Background technique [0002] my country is the largest coal producer and consumer in the world. With the economic growth, the demand for coal is increasing. Difficult-to-mining coal seams are widely distributed and have large reserves. The proven reserves account for as much as 20% of the total coal reserves, but the mining volume only accounts for about 8% of the total output, which is far lower than the proportion of its reserves. All coal mining enterprises are facing the mining problem of difficult-to-mining coal seams, especially the reserves of medium-thick coal seams are decreasing day by day. The development of mining technology for difficult-to-mining coal seams is extremely important, and its mining has become a gl...

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Problems solved by technology

[0003] Due to the difficulty in efficient and safe excavation of difficult-to-mining coal seam roadways, my country studied the application of water jet technology to drum shearers, coal plows and drilling rigs in the 1970s, which has a significant effect in rock cutting compared with ordinary mining equipment. Advantages: It reduces the volume of the mining equipment, improves the environment of the working face, improves the ability of the mining equipment to cut coal and rock, and achieves certain social and economic benefits; The impact crushing ability of the rock is insufficient, and the excessive water consumption per unit time may easily cause flooding in the mining face, resulting in the failure of normal construction at the working face

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