IMPACT PNEUMATIC DEVICE Russian patent published in 2008 - IPC E02F5/18 

FIELD: construction.

SUBSTANCE: invention is related to pneumatic-percussive mechanisms, which are intended for trenchless installation of underground supply pipelines. Device contains hollow casing with hammer installed in it with central through channel, which separates casing cavity into chambers of working and idle stroke, tube with longitudinal through channel that interacts with central through channel of hammer, which is equipped with constantly open throttle inlet channel to idle stroke chamber, cover with relief channels and through central opening for passage of tube installed in central opening of cover with annular gap that forms throttle inlet channel to chamber of working stroke, threaded sleeve with constantly open inlet channel and hose for compressed air supply, network chamber formed in threaded sleeve, prechamber of network air that is formed between threaded sleeve and cover and that is constantly communicated by its relief valves with network chamber, working tool with tailpiece that enters into idle stroke chamber, outlet channel in casing that is covered with air-throwing cartridge with annular outlet opening, which is installed with annular gap in relation to the casing from the side opposite to tailpiece. Working tool is made in the form of annular shell that is put on the end of installed pipe. Tailpiece of working tool is made with through stepped channel, in tailpiece step of larger diameter tube is installed with clearance, in which is its turn through pipe is installed with circumferential clearance, which is fixed by means of sealing rings in threaded sleeve and in tailpiece step of smaller diameter. The device provides continuity of operation, reduces number of units of earth removal process mechanisation facilities units, reduces terms of underground pipelines installation.

EFFECT: provision of continuity of operation, reduction of number of units of earth removal process mechanisation facilities units, reduction of terms of underground pipelines installation.

1 dwg