Steel strand tension device
A technology of tensioning device and steel strand, which is applied in the direction of erecting/assembling bridges, bridge materials, bridges, etc., which can solve problems such as difficulty in tension generation and impact on project quality, so as to prevent springback, ensure project quality, and operate conveniently and safely Effect
Active Publication Date: 2016-01-13
CHONGQING TECH & BUSINESS INST
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Problems solved by technology
[0002]In the construction of bridges, it is necessary to pass steel strands in the prestressed pipes of the bridge, and then stretch the steel strands with a tensioning device. The tapered clips are set on the strands, and the steel strands rebound after the steel strands are released, so that the tapered clips are inserted into the holes of the embedded anchor pads to tension the steel strands. This method needs to be applied The steel strand is stretched by a force greater than the designed prestress, and it is difficult to generate tension. In particular, after the steel strand rebounds, the prestress imposed on the bridge by the steel strand is often quite different from the designed prestress. The difference, which will inevitably have a great impact on the quality of the project
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[0015] figure 1 It is a structural schematic diagram of the present invention; as shown in the figure, the prestressed tensioning device of the present embodiment includes a bridge 1, a prestressed hole arranged in the bridge 1, a steel strand 5 passing through the prestressed hole, An oil cylinder 3 for pulling the steel strand 5, a hydraulic pump 7 for driving the action of the oil cylinder 3, and a magnetorheological damping body for fixing the steel strand 5; The piston 9 is fixedly connected, the steel strand 5 is fixed with a fixed block 12, and the magneto-rheological damping body includes a tensioning wheel 11 rolling with the fixed block 12 and a tensioning wheel 11 connected with the tensioning wheel 11. An intermediate wheel, the intermediate wheel is arranged outside the magnetorheological housing 13 for accommodating the intermediate wheel, the magnetorheological housing 13 is filled with magnetorheological fluid and the magnetorheological fluid housing 13 is woun...
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The invention discloses a steel strand tension device, comprising a bridge, prestressing force holes arranged in the bridge, a steel strand passing through the prestressing force holes, an oil cylinder used to pull the steel strand, a hydraulic pump used to drive the oil cylinder to operate, and a magnetorheological damping body used to fix the steel strand. The structure improvement is clever, and the steel strand is fixed by using the characteristics of a magnetorheological fluid, and the steel strand is prevented from rebounded. The device can ensure project quality of the bridge, and operation is more convenient and safer.
Description
technical field [0001] The invention relates to the field of prestressed bridges, in particular to a steel strand tensioning device. Background technique [0002] In the construction of bridges, it is necessary to wear steel strands in the prestressed pipe of the bridge, and then stretch the steel strands with a tensioning device. After stretching, set a tapered clip on the steel strands, and use the steel strands to release After the rebound of the steel strand, the tapered clip is inserted into the hole of the embedded anchor pad to tension the steel strand. This method requires a force greater than the designed prestress to stretch the steel strand , It is more difficult to generate tension, especially, after the steel strand rebounds, the prestress exerted by the steel strand on the bridge is often quite different from the designed prestress, which will inevitably have a great impact on the quality of the project. [0003] Therefore, the object of the present invention ...
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IPC IPC(8): E01D21/00E04G21/12E01D101/28
Inventor 罗晓良
Owner CHONGQING TECH & BUSINESS INST