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Control method for erecting main cable based on suspension bridge air spinning method

A control method and main cable technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve the problems that the AS method centralized control system has not carried out in-depth research, etc., to improve automation and operability Effect

Pending Publication Date: 2022-04-08
CCCC SHEC SECOND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The successful application of the "air spinning method" can not only greatly reduce the transportation pressure of the project, reduce the difficulty of the construction of suspension bridges in difficult and dangerous mountainous areas, but also have important significance for meeting the construction needs of super-long-span suspension bridges in the future and opening up the international market for suspension bridge construction. The AS method centralized control system has not yet carried out in-depth research

Method used

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  • Control method for erecting main cable based on suspension bridge air spinning method
  • Control method for erecting main cable based on suspension bridge air spinning method
  • Control method for erecting main cable based on suspension bridge air spinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a control method for erecting the main cable based on the aerial spinning method of the suspension bridge. During the aerial spinning process, the real-time communication connection between the host computer 7 and the monitoring system is used to monitor the construction site.

[0031] The lower computer 9 monitors the steel wire tension data measured by the tension measuring devices installed on both sides of the tension tower 26 in real time, and compares the steel wire tension data with the tension set value, and then controls the unwinding mechanism to unwind the wire or the winding mechanism to wind the wire. The tension device adjusts the tension force to realize the constant tension control of the main cable wire;

[0032] The lower computer receives the real-time winding diameter of the winding mechanism through the winding diameter measuring device 6, and converts the winding angular velocity of the winding mechanism into a linear speed ...

Embodiment 2

[0035] On the basis of Embodiment 1, this embodiment provides a control method for erecting the main cable based on the aerial spinning method of the suspension bridge. The constant tension control process of the main cable steel wire is as follows: the lower computer 9 measures the unwinding mechanism in real time through the tension measuring device The tension value of the steel wire during the wire winding process of the unwinding or rewinding mechanism outputs a signal to the unwinding proportional valve 12 or rewinding proportional valve 18 in a PID adjustment mode, and continuously adjusts the unwinding tension or rewinding tension to the set value through the tension device , so as to realize the constant tension of the main cable wire.

[0036] Taking the unwinding process as an example, during the unwinding system, the tension sensor measures the actual tension, and the PLC outputs the signal to the pneumatic proportional control valve in the PID adjustment mode, and ...

Embodiment 3

[0038]On the basis of Embodiment 1, this embodiment provides a control method for erecting the main cable based on the aerial spinning method of the suspension bridge. During the unwinding mechanism unwinding or the winding mechanism winding process, the lower computer 9 sends a signal to the The unwinding frequency converter of the winding mechanism or the winding frequency converter 11 of the winding mechanism makes the unwinding motor 13 or the winding motor 10 adopt a constant torque control mode to realize the constant tension of the steel wire during the change of the coil diameter.

[0039] During the unwinding mechanism unwinding or the winding mechanism winding process, the coil diameter changes, and after the coil diameter changes, the tension will also change. Therefore, the real-time coil diameter of the coil mechanism is measured by the coil diameter measuring device 6 and the measured data is real-time. Send it to the lower computer 9, and the lower computer 9 sen...

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Abstract

According to the control method for erecting the main cable based on the suspension bridge aerial spinning method, in the aerial spinning process, an upper computer and a monitoring system are in real-time communication connection to monitor a construction site, and a tension device in the wire unwinding process of an unwinding mechanism or the wire winding process of a winding mechanism is controlled in real time through a lower computer; the tension measuring devices on the two sides of the tension tower are monitored at the same time and compared with a tension set value to achieve constant tension control over the main cable steel wire, the real-time winding diameter of the winding mechanism is measured through the winding diameter measuring device, the angular speed is converted into the linear speed through the lower computer, and the winding length of the winding mechanism is obtained through the length metering device. According to the system, the upper computer monitors the operation state of each device in real time, the lower computer monitors the operation state of each device in real time, control adjustment is carried out according to measurement data of each sensor, and real-time interaction between integrated control and construction site operation is realized through the visual monitoring system, so that the automation and operability of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of linkage control of a suspension bridge aerial spinning system, and in particular relates to a control method for erecting a main cable based on a suspension bridge aerial spinning method. Background technique [0002] The method of erecting the main cables of modern suspension bridges in my country basically adopts the prefabricated parallel strand (PPWS) method. This process is to form a number of steel wire ropes into parallel steel wire bundles with a regular hexagonal cross-section, and wrap them with fiber strength tape to form parallel steel wire ropes. Anchor heads are installed at both ends of the strand, and then transported to the construction site on a plate. After being erected on site, the main cable is formed. The strands are manufactured in advance in the factory and transported to the site for direct erection. With the increase of the span of the suspension bridge, the increase of the lengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 郭瑞喻胜刚杨博王旭阳李金余薛胜伟施昊柳莹张海霞
Owner CCCC SHEC SECOND ENG
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