SELF-PROPELLED TRENCH TYPE HOIST FOR PIPE LINES

摘要

erection and repair of pipe lines. SUBSTANCE: hoist is designed for holding the pipe line in freely suspended state during its repair; hoist includes lifting support and head support interconnected by means of step- by-step motion hydraulic cylinder. Lifting support is provided with pipe line hoisting mechanism. Supports are moved in turn. In hoisting the pipe line, head support is unloaded by lifting support and is moved one step. After lowering the pipe line on head support, unloaded lifting support is moved by one step. EFFECT: extended range of application. 2 cl, 15 dwg