Air gun for removing burnt and clogging material

摘要

Compressed air intended for producing air impacts for removing adhering and clogging material /6/ is accumulated in a pressure tank /1/ wherefrom it is supplied via an outlet valve /3/ and a discharge nozzle /11/ connected therewith into a region of the burnt adhering material /6/ causing removing thereof. The outlet valve /3/ comprises a valve housing /9/ and a piston /19/ being guided in a guide /18/ and on the rear side of which acts a closing pressure. Said piston /19/ has on its front end face facing said outlet nozzle /11/ an annular valve sealing surface /25/ inside of which acts pressure being present in the outlet nozzle /11/ when said outlet valve /3/ is closed, and wherein a pressure of said pressure tank /1/ acts on an area outside of said annular sealing surface. An annular channel /17/ formed between said valve housing /9/ and said piston /19 guide /18/ is connected to said pressure tank /1/. In open position of said outlet valve /3/ the annular channel /17/ forms a perfect cylindrical opening /39/ that opens into said outlet nozzle /11/.