Post tension multi-strands stressing jack and pump
2021-01-29 10:04:59
Post tension multi-strands stressing jack and pump
The post tension multi-strands stressing jack can be used for single-hole tensioning and group-anchor tensioning one by one, and can be used to troubleshoot failures and perform anchor withdrawal and supplementary tensioning. The post tension multi-strands stressing jack is light in weight, easy to operate, high in efficiency, and the reserved length of the steel strand is short, which is especially suitable for high-altitude or small space operations.
The post tension multi-strands stressing jack and pump used for tensioning steel strands and other prestressed tendons. The multi-strands stressing jack and pump，and the power for tensioning and topping is provided by the high pressure oil of the tensioning oil pump. According to the difference of structure, it is divided into front jack and through jack. The post tension multi-strands stressing jack has a compact structure, works smoothly during tension, high oil pressure, and large tension force. It is widely used in prestressed construction projects such as highway bridges, railway bridges, hydroelectric dams, and high-rise buildings.
Working principle: When post tension multi-strands stressing jack, the oil nozzle of the tensioning cylinder enters the oil, and the oil nozzle of the top pressure cylinder returns oil. The top pressure oil cylinder, the connecting sleeve and the supporting sleeve are connected to move the anchor ring right; tensioning oil cylinder, end cover nut and plug The head and the core sleeve are connected as a whole to drive the tool anchor to move to the left to tension the prestressed tendons; when the top pressure is anchored, the top pressure cylinder nozzle is filled with oil, and the top pressure, protective sleeve and top pressure head are connected move the clip to the right to push the clip into the anchor ring; at this time, the oil nozzle of the tension cylinder returns oil, the oil nozzle of the top pressure cylinder enters, and the tension cylinder returns hydraulically. The oil nozzles of the tension cylinder and the top pressure cylinder return oil at the same time, and the top pressure is reset under the action of the spring force. For large-span structures, long steel wire bundles and other large extensions, tension jacks are the best.
Precautions for use:
1. The post tension multi-strands stressing jack and pump connected through the high-pressure oil pipe, and the professional electrician connects the oil pump to the power source through the power cord.
2. Themulti-strands stressing jack and pump dry run.
3. Turn on the oil pump and run it no less than 3 times. If there is crawling, it can be increased to 6 times. If there is crawling again, stop the pump for inspection and analyze the reason. Before the jack and oil pump system are calibrated and tensioned, the jack must be run dry. After everything is normal, you can enter the calibration or tension work.
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