SU443968A1 - Percussion device - Google Patents

Description

I

This invention relates to the mining industry, namely pneumatic percussion drilling machines.

Percussion devices are known that include a cylinder with channels for supplying and discharging fluid and compressed air, which reciprocate a shock piston that interacts with the end of the plunger entering the working chamber of the cylinder, the other end of which forms with the cylinder in fluid communication with the hydraulic rotation motor auger, a cavity filled with liquid from a supply line.

The proposed device is characterized in that the plunger is provided with a protrusion located in an additional cavity made in the cylinder, which communicates with its working chamber and the atmosphere through channels.

This embodiment of the device increases the reliability of the return of the plunger to its original position.

The drawing shows the device hitting the action, section.

The proposed device has a cylinder

1 with forward 2 and reverse 3 channels, inside of which a piston 4 is placed with the possibility of a repeated post movement with an air distribution undercut 5 permanently connected to the main channel 6. The cylinder 1 is provided with a hydraulic system consisting of a chamber 7, filled with liquid, in the lower part of which a plunger 8 with an annular protrusion 9 is placed. An L-shaped channel 1O is made in the body of the plunger, which during operation of the device can periodically connect with the inlet channel 11. The annular protrusion of the plunger 9 can mix qi body cavity 12; shndra connected to the cylinder chamber 13 and the channel with the atmosphere channel 14.

Chamber 7 is connected to channel 15 with a hydraulic motor 16 for rotating the drill 17. Exhaust air is exhausted through channels 18.

Operation of the device begins with the supply of compressed air (X) to the trunk terminal ti, from KOTOpoi-o, through the undercut 5, it flows across either the channel 2 or the channel 3, depending on the position of the piston, which ensures its reciprocating motion. The exhaust air from the working chambers 19 and 2 O is alternately discharged through the channels 18. After the piston 4 collides with the plunger 8, the latter transmits a shock impulse to the liquid into the chamber 7, which through the channel 15 enters the hydraulic motor 16, turning the drill 17. The waste liquid goes to washing the hole. In the process of the collision of the piston 4 and plunger 8, as a result. moving the latter, the L-shaped channel 10 is aligned with the i inlet channel 11, which ensures that the chamber 7 is filled with liquid. After the piston 4 departs from the plunger 8, the last i returns to the initial position under | by increasing the pressure on the annular protrusion 9 placed in the cavity 12 of the chamber of the cylinder 19 through the channel 13. The overpressure from the cavity 12 is then released through the channel 14: into the atmosphere; The subject matter of the invention is a percussion device comprising a cylinder with channels for supplying and discharging liquid and compressed air, which causes a reciprocating movement of a percussion piston that interacts with the end of the plunger entering the working chamber of the cylinder, Informed with the hydraulic motor of rotation of the drill, the cavity filled with fluid from the supply line, characterized in that, in order to increase the reliability of the return of the plunger to its initial position, it is provided with a protrusion a cylinder formed in the storage chamber, which communicates with the atmosphere and its working through channels.