DOUBLE ACTION COMPRESSION-VACUUM IMPACT MACHINE Russian patent published in 2019 - IPC E21B1/12 E21B1/38 B25D9/08 B25D9/26 

FIELD: construction; mining.

SUBSTANCE: invention relates to mining and construction, namely to impact machines used in breaking monoliths, for destruction of obsolete foundations during reconstruction of buildings and pile driving, in seismic survey as source of excitation of seismic waves at shallow depths. Machine comprises a housing and a striker arranged therein, forming a lower chamber and an upper chamber connected to the vacuum compressor, working tool, inertial-friction valve in upper part of housing, containing slide valve with friction bushing-seat. Lower chamber is connected to atmosphere. Upper chamber is connected with vacuum and pressure lines of vacuum compressor alternatively through said inertial-friction valve, which slide valve is equipped in lower part with magnetic retainer, in upper part – by working medium distributor, made with possibility of alternate connection by means of hammer of vacuum and pressure lines of vacuum compressor with upper chamber and atmosphere. Friction bushing-seat slide valve is made of resilient material with a latch with possibility of locking slide valve in its upper position in housing cover, wherein said latch consists of adjustable spring and spool retainer arranged on its outer side.

EFFECT: possibility of operation in any direction, higher energy and frequency of shocks, elimination of short-lived flexible links.

1 cl, 2 dwg