Manual-automatic integrated tensioning system

Abstract

The invention discloses a manual-automatic integrated tensioning system comprising a hydraulic oil cylinder jack, a hydraulic system, a control cabinet, a manual-automatic switching circuit and a sensor group, wherein the hydraulic system comprises an oil tank, a hydraulic pump, a motor, a variable frequency control system and a servo proportional control system; the variable frequency control system comprises a frequency converter for controlling the rotating speed of the motor; the servo proportional control system comprises a servo proportional valve arranged between the hydraulic pump and the hydraulic oil cylinder jack; a hydraulic control one-way valve is arranged between the servo proportional valve and the hydraulic oil cylinder jack; an unloading control bypass is arranged between the hydraulic control one-way valve and the servo proportional valve; an electromagnetic valve and a controllable unloading device are arranged on the unloading control bypass; a central processing system, an execution control system connected with the central processing system and a communication module connected with the execution control system are arranged in the control cabinet; and a data wire interface and / or a radio station are / is arranged on the communication module.

Description

technical field [0001] The invention belongs to the technical field of civil engineering construction equipment, in particular to a manual-automatic integrated tensioning system for prestressed tensioning. Background technique [0002] Prestressing technology has been widely used in civil engineering. According to preliminary statistics, by the end of 2011, there were 689,400 highway bridges and 33,494,400 meters in my country, of which bridge projects using prestressed structures accounted for more than 90% of the total. At the same time, prestressing technology has become an indispensable technology in large-span, large-space structures, high-rise structures, heavy-duty structures, special structures and new structural engineering. and many other fields. [0003] But at the same time, due to the influence of various factors, the construction quality of some bridge structures is poor, resulting in frequent bridge collapse accidents during construction and use. In recent ...

AI Technical Summary

Problems solved by technology

This traditional prestressed tensioning process has many defects, such as extensive tensioning operation, large loss of prestressed force, difficulty in synchronous tensioning, failure to detect hidden dangers in time, etc.

It can be seen that the prestress control precision of traditional tension is low, the construction management is difficult, the construction efficiency is low, and it is difficult to guarantee the construction quality and operation safety of the project, which has become an important factor restricting the application and development of prestressed structures.

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