Quick-drill pneumatic hard rock drill

Abstract

The invention discloses a quick-drill pneumatic hard rock drill which comprises a host machine, an operating valve and a propulsion unit, which are independent of one another and are connected with one another. An air suction nozzle communicated with an air distribution valve is arranged on a base of the host machine; the air distribution valve is in a fin type structure and consists of a valve body, a valve block and a valve rod; a valve cavity is arranged inside the valve body and is respectively communicated with a front chamber and a back chamber of a cylinder body through left and right air passages; the seesaw-like valve block is installed in the valve cavity through the valve rod; under the action of air pressure, the two ends of the valve block can respectively close or open the left and right air passages to enable a piston rod to move with high frequency; and a rotating device is arranged on a machine head. According to the invention, a new fin type air distribution valve which is flexible in change-over is adopted, so the impact frequency is greatly improved. The rotating device realizes primary transmission by adopting worm-and-gear principle, the transmission ratio is big, and the transmission efficiency is high. The quick-drill pneumatic hard rock drill is small in size, light in weight and convenient to operate, and is applicable for various propulsion modes.

Description

technical field [0001] The invention belongs to the category of rock drilling machines used in mines. Background technique [0002] The pneumatic rock drill used in mines is referred to as a pneumatic drill, which is a percussion drilling machine powered by compressed air. It is typically represented by the 7655 rock drill, which is most suitable for drilling horizontal or inclined horizontal or inclined blastholes on medium-hard or hard (f=8~18) rocks, with a drilling depth of up to 5 meters; it is widely used in Drilling and blasting holes in rock roadway excavation and various rock drilling operations is an important machine tool in stonework projects such as mines, railways, transportation, and water conservancy construction. It weighs 24 kg, and the impact frequency is ≥28 Hz when the working air pressure is 0.5 MPa; the air distribution form adopts a bowl-shaped air distribution valve, which has a reasonable structure and flexible start. The 7655D air leg rock drill ...

AI Technical Summary

Problems solved by technology

Since the rock bolt rig uses a pneumatic pick-type main engine, it can only be used to install rock bolts and cannot be used for blasting drilling in mines; moreover, the wind motor needs a four-stage gearbox to reduce the speed, which is large, heavy, and inconvenient to operate.

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