Air leg type rock drill
A technology of rock drills and air legs, applied in the field of air leg rock drills, which can solve the problems of forming air cushions, affecting piston strokes, and slowing rock drilling efficiency
Inactive Publication Date: 2020-06-12
JIANGSU HEHAI GRP
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Problems solved by technology
[0005] The invention provides an air-leg rock drill, which has the advantage of ensuring that the piston stroke is always at the maximum position, and solves the problem that after the piston returns, an air cushion will be formed on the left side of the piston, which will affect the stroke of the piston and cause the rock drilling efficiency to slow down.
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[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0022] see Figure 1-5 , an air-leg rock drill, comprising a cylinder body 1, one end of the cylinder body 1 is fixedly equipped with a control valve 2, the upper part of the cylinder body 1 close to the side of the control valve 2 is provided with an exhaust hole 3, the upper part of the cylinder body 1 A muffler box 4 is fixedly installed on the surface, and the muffler box 4 includes an exhaust hole 3. The inner side of the cylinder body 1 close to the cont...
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The invention relates to the technical field of ore production equipment, and discloses an air leg type rock drill. According to the air leg type rock drill, a spring and a sliding plug are movably arranged inside a piston in a sleeved mode, a bent air hole is formed inside the sliding plug, the bent air hole is in a C shape and is provided with an upward opening, under the stretching state of thespring, one end of the bent air hole stretches out of the piston to enter a front cavity, and the other end of the bent air hole cooperates with a formed pressure discharging hole so that air continuously compressed in the front cavity can be enabled to communicate with the external environment through an exhaust hole, then an air cushion cannot be generated in the front cavity in the return stroke process of the piston, and the piston can make contact with an air distribution valve; and at the moment, a rear cavity communicates with the exhaust hole, the pressure of the rear cavity is reduced, the spring is reset, the sliding plug is retracted into the piston, and the front cavity is in a sealed state so that compressed air can be injected next time for stroke, it can be guaranteed thatthe stroke of the pressed piston reaches the designed maximum distance, and in existing equipment, the stroke of a piston cannot reach the maximum under the action of the pressing force.
Description
technical field [0001] The invention relates to the technical field of ore production equipment, in particular to an air leg rock drill. Background technique [0002] Air-leg rock drill is a high-efficiency rock drilling machine. It is widely used in rock roadway excavation and various rock drilling operations to drill blast holes. It is an important machine in stonework projects such as mines, railways, transportation, and water conservancy construction. The air leg rock drill relies on compressed air to drive the piston to reciprocate. During the stroke, the piston hits the drill tail, and during the return stroke, the piston drives the drill tool to rotate to achieve rock breaking and drilling. [0003] The existing air-leg rock drill first controls the compressed air to enter the air cavity by manipulating the valve hole, and then enters the air distribution valve to fill the compressed air into the front cavity between the piston and the ratchet mechanism, and the rear ...
Claims
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IPC IPC(8): E21B1/30
CPCE21B1/00
Inventor 姚佳锋
Owner JIANGSU HEHAI GRP