INSTALLATION FOR LIFTING-LOWERING PIPES UNDER PRESSURE

摘要

Installation for lowering-lifting pipes under pressure consists of holders for fixation and feeding pipes and drive arranged as hydro-cylinders connected to pressure source. Holders for fixation and feeding pipes are connected to rods of respective pairs of placed in diagonal positions hydro-cylinders and are placed with possibility of reciprocal motion of those in counter directions with respect to each other with provision with each holder in turn of pipe feeding. Rod-less cavities of neighboring hydro-cylinders of drives of the upper and the lower holders are connected to pressure source, and rod cavities of those are connected to rod cavities of neighboring hydro-cylinders of drives of the upper and the lower holders rod-less cavities of which are connected to each other as well.