High pressure water jet and hob multi-degree-of-freedom combinedrock breaking experiment device

Abstract

The invention discloses a high pressure water jet and hob multi-degree-of-freedom combined rock breaking experiment device. The rock breaking experiment device comprises a rock breaking main structure, a fluid power system, a water jet pressurizing device, an electric control cabinet and an abrasive supply device, wherein the fluide power system, the water jet pressuring device, the electric control cabinet and the abrasive supply device are arranged on the two sides of the rock breaking main structure,a hob and a water jet nozzle in the rock breaking main structure are positioned on a knife seat, the fluid power system provides driving force for a hydraulic cylinder in the rock breaking main structure, high pressure water is generated and conveyed to the nozzle by the water jet pressuringdevice, and the electric control cabinet controls the fluid power system and the water jet pressuring device to work; the abrasive supply device provides abrasives for water jet ejected by the nozzle; a stone silo containing rock samples can move back and forth in the longitudinal direction and the horizontal direction;ahob seat can move up and down in the vertical direction, and the relative positions and the angles of the hob and the water jet nozzle on the knife seat are adjustable. According to the rock breaking experiment device, anindependenthigh pressure water jet rock breaking experiment or an independenthobrock breaking experimentcan be conducted, a high pressure water jet and hob multi-degree-of-freedom combined rock breaking experiment can also be conducted, and various combinations and relative parameters can be adjusted independently.

Description

technical field [0001] The invention particularly relates to an experimental device for cutting rock with a TBM (hard rock boring machine) excavation tool in the field of tunnel engineering, in particular to a multi-degree-of-freedom composite rock-breaking experimental device for a high-pressure water jet hob. Background technique [0002] In recent years, with the increasing demand for underground space engineering construction in my country and the faster and faster construction speed, the application of TBM hard rock roadheaders has become more and more extensive. As the main tool for breaking rocks on TBM, disc hobs Rock-breaking efficiency and wear directly affect the progress and cost of underground engineering construction. Therefore, more and more experimental studies have been carried out on the rock-breaking characteristics of TBM tools. However, the breakthrough of pure mechanical tool rock-breaking technology has slowed down until now. It is about to reach the bot...

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Problems solved by technology

[0003] Through the search of relevant domestic literature and materials, it is found that there are some researches on the combined rock breaking of high-pressure water jets and picks, such as "The Influence of High-Pressure Water Jets on the Coal Cutting Performance of Shearers", "Water Jet-Mechanical Cutters Combined Rock Breaking" In the papers such as "Experimental Research on Influencing Factors of High Pressure Water Jet-Mechanical Teeth Combined Rock Breaking", the influence of high pressure water jet on rock breaking of picks was explored; in addition, the application of high pressure water jet in sheet metal cutting and other aspects More and more, and there are also many independent hob rock-breaking experimental devices. For example, the patent number applied by Central South University is CN 103969141 A, and the name is "a hard rock hob rock-breaking characteristic test device". The invention patent and the China Railway Tunnel Bureau Group The patent No. applied by Co., Ltd. is CN 207908291 U, and the title is "Experimental Device for Measuring Three-degree-of-freedom Hob Rock Breaking and Wear". There are still few studies on the new type of rock-breaking combined with knives, and there are even fewer researches on the combined rock-breaking test bench of the two.

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