GEAR TO STRESS BUNDLES OF STRAND REINFORCEMENT OF FERROCONCRETE STRUCTURES Russian patent published in 2000 - IPC

FIELD: construction industry. SUBSTANCE: gear to stress bundles of strand reinforcement of ferroconcrete structures includes hydraulic drive, anchor and stopping fittings, front and rear collet clamps of bundles of strand reinforcement placed correspondingly in anchor and stopping fittings, hydraulic cylinder with case and piston forming together with case chambers of forward and reverse strokes, device to press front collet clamps with guiding passages for strands placed between tension piston and anchor fitting that can come in the form of pressing piston forming together with case chamber of forward stroke. Pressing piston is made with guiding passages for strands and is arranged for interaction with front collet clamps. Stopping fitting is installed in tension piston. Gear is fitted with device for pressing and pressing-out of rear collet clamps fabricated, for instance, in the form of additional piston fastened to tension piston and mounted for movement with regard to tension piston of case with rest that interacts with additional case of pusher mounted for interaction with butts of rear collet clamps. Additional case and piston form pressing and pressing-out chambers of rear collet clamps. Case of gear rests against anchor fitting via transducer of stress of bundles. Extending guiding tubes are pressed into guiding passages. Indicator is used to check stress of bundles. EFFECT: increased accuracy of observance of technological mode with simultaneous reduction of time needed for auxiliary operations. 2 cl, 2 dwg