An air leg rock drill
A technology of rock drills and air legs, applied in the field of air leg rock drills, which can solve problems such as slowing down of rock drilling efficiency, affecting piston strokes, and forming air cushions
Inactive Publication Date: 2021-05-14
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 rock drill. The air-leg rock drill uses a spring and a sliding plug movable inside the piston, and a bending air hole is opened inside the sliding plug. The bending air hole is in a "C" shape, and the opening is upward. When the spring is stretched, the bending air hole One end protrudes from the piston to enter the front cavity, and the other end cooperates with the opened pressure relief hole, which can communicate the continuously compressed air in the front cavity with the external environment through the exhaust hole, so that the front cavity does not move during the return process of the piston. An air cushion will be generated, and the piston and the gas distribution valve can be in contact. At this time, the rear cavity is connected to the exhaust hole, the pressure in the rear cavity becomes smaller, and the spring returns to retract the slide plug to the inside of the piston. The front cavity is in a sealed state, which can The next injection of compressed air for stroke can ensure that the stroke of the piston after being pressurized reaches the designed maximum distance. In the existing equipment, the stroke of the piston cannot reach the maximum under the action of the pressure 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