Low-retracting secondary stretch-draw anchorage supporting nut screwing device

Abstract

The invention discloses a low-retracting secondary stretch-draw anchorage supporting nut screwing device which mainly aims to solve the technical problems that the existing low-retracting secondary stretch-draw anchorage supporting nut is inconvenient to screw and the like. The technical scheme is as follows: the device comprises an inward-convex connection sleeve (1), a transition sleeve (2), a driven rotary wheel (3), a driving rotary wheel (4), a power machine (5) and a stretch-draw bracket (6), wherein an inner boss is designed in the inner cavity of the inward-convex connection sleeve (1), and is matched with a groove corresponding to the periphery of a secondary stretch-draw anchorage supporting nut (7); more than three grooves are arranged at the upper end of the inward-convex connection sleeve (1); more than three bosses matched with the grooves at the upper end surface of the inward-convex connection sleeve (1) are arranged on the lower end surface of the transition sleeve (2); the grooves on the upper end surface of the inward-convex connection sleeve (1) are connected with the bosses on the lower end surface of the transition sleeve (2) in clearance fit; and a rotation device is arranged on the transition sleeve (2). The device disclosed by the invention well solves the problem of screwing the low-retracting secondary stretch-draw anchorage supporting nut, and can remarkably reduce the size of the reserved grooves on the bridge deck, reduce the concrete cut section of the bridge, reduce the difficulty in operating the knob supporting nut and improve the construction efficiency. The device can be widely applied to the box girder construction engineering adopting a suspension casting construction method, particularly to the mounting of the vertical pre-stressed low-retracting secondary stretch-draw anchorage in bridge engineering.

Description

Technical field [0001] The invention relates to a low-retraction secondary tension anchor supporting nut tightening device, in particular to a secondary tension anchor supporting nut tightening device in a groove. Background technique [0002] At present, low-retraction secondary tension anchors are used for vertical prestressing of bridge projects. Because the anchors are on the upper part of the beam but are not allowed to rise above the bridge deck, the low-retraction secondary tension anchors must be set below the bridge deck. In the groove. When the anchor is tensioned for the second time, the supporting nut needs to be tightened downwards. Because it is in the groove and the space is small, it brings difficulties and inconvenience to the construction operation. At the same time, to meet the manual tightening operation, the bridge deck The size of the reserved groove is larger, which weakens the structural size of the bridge concrete. Summary of the invention [0003] The o...

AI Technical Summary

Problems solved by technology

During the second tensioning construction of the anchor, the support nut needs to be tightened downwards. Because it is in the groove and the space is narrow, it brings difficulties and inconvenience to the construction operation. At the same time, in order to meet the manual tightening operation, the bridge deck The size of the reserved groove is larger, which weakens the structural size of the bridge concrete

Images