PNEUMATIC SELF-PROPELLED IMPACT DEVICE FOR ROCK CRUSHING BY MEANS OF SUPERHIGH-PRESSURE PULSE JET Russian patent published in 2019 - IPC E21B7/18 

FIELD: machine building; devices for crushing.

SUBSTANCE: invention discloses a pneumatic self-propelled impact device for rock crushing using a superhigh-pressure pulse jet. Device consists of compressed air compressor, air receiver, low-pressure water feed pump, bypass valve, pulse electromagnetic valve, ball valve, combined water-air pipe, water-air inlet union, impact piston acceleration chamber, middle piston chamber, front pressure water chamber, single-pass valve, impact drilling head, spring, locking coupling, central piston, impact piston and impact piston cushion. Front end of front pressure water chamber is equipped with end cover, rear end of front pressure water chamber is connected to front end of middle piston chamber, rear end of middle piston chamber is connected to front end of impact piston acceleration chamber, and the rear end of the impact piston acceleration chamber has a water-air inlet union. End cover is equipped with holes for removal of wastes of rock, unions for attachment of hard-alloy spherical cutters and hard-alloy spherical mills. Front pressure water chamber is equipped with impact drilling head with spring. Medium piston chamber is equipped with middle piston. Percussion accelerating chamber is equipped with impact piston. End cover, front pressure water chamber, middle piston chamber, impact piston acceleration chamber are connected in series due to water lines laid through water-air inlet union. Water-air inlet union is connected to compressed air compressor and low-pressure feeding water pump by means of combined water-air pipe. Providing simplicity and compactness of structure, ease of assembly and dismantling, high power and good sealing, efficient crushing of rock with high coefficient of hardness on Platt by means of ultra-high-pressure pulse jet.

EFFECT: reduced strength of rock and simplified operation for mechanical rigging of drilling head and, consequently, increased efficiency and capacity of crushing, reducing the level of dusting from rock fragments, prolonging service life of mechanical equipment, increasing safety and efficiency of development of deposits.

7 cl, 8 dwg