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Control method of intelligent tension system and intelligent tension system

A technology of intelligent tensioning and control method, applied in the control of intelligent tensioning system and the field of intelligent tensioning system, can solve the problems of high failure rate of tensioning system, excessive tensioning control force, low synchronization accuracy, etc. Data measurement accuracy and construction efficiency, reducing labor intensity and improving labor efficiency

Active Publication Date: 2014-01-22
LIUZHOU QIAN BRIDGE ENG MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional prestressed tensioning equipment and construction methods are all manually operated, and the pressure is adjusted and controlled by manually operating the handwheel control valve of the oil pump. The pressure value is read manually from the pressure gauge, and the steel strand is read manually using a steel ruler or tape measure. The elongation value of the line is measured, so the pressure error is large and the synchronization accuracy is low, especially the long-span box girder and rigid frame bridge that require multiple inversions. Because jacks and tool anchors need to be reinstalled for each stroke, the labor intensity and safety hazards are extremely high. Big
At present, there are also some automatic control tensioning equipment, but there are many defects: 1. It is impossible to realize the single-pump single-jack and multi-pump multi-jack scheme, and the application range is very limited; 2. The data transmission is unstable. Loss of recorded data often occurs; 3. The performance of the control system is unreliable, the failure rate of the tensioning system is high, and sometimes there will be a phenomenon of loss of control, resulting in the situation that the tension control force is too large or too small; 4. The signal transmission of the control system is not continuous , causing the "strike" phenomenon that the system cannot work; 5. Automatic tensioning can only be realized within a single stroke, and automatic rewinding of multiple strokes cannot be realized

Method used

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  • Control method of intelligent tension system and intelligent tension system
  • Control method of intelligent tension system and intelligent tension system
  • Control method of intelligent tension system and intelligent tension system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] like figure 1 , 4 , 5, 6, 7, and 9 are the embodiments of single pump and single roof. The intelligent tensioning system mainly includes anchorage 10, the first limiting plate 9, the first tool anchor 6, the first intelligent jack 8, the main Pumping station 1, the main pumping station 1 is connected with the first intelligent jack 8 arranged on the prestressed bundle through a plurality of oil pipes 4, the main pumping station 1 has a control cabinet, and a data acquisition instrument controlled by the control system is arranged in the control cabinet, The outer side of the first smart jack 8 is provided with a first displacement sensor 7 for measuring the extension length of the jack piston rod, and a pressure sensor 37 for measuring the pressure value of the jack is also arranged on the oil inlet road of the first smart jack 8. The main pumping station 1 The control system is electrically connected with the first displacement sensor 7 and the pressure sensor 37 of t...

Embodiment 2

[0090] like figure 2 , 8 , 10, and 11, the intelligent tensioning system mainly includes the first working anchor plate 10, the second working anchor plate 13, the first limiting plate 9, the second limiting plate 14, the first tool anchor 6, the second tool anchor Anchor 17, the first intelligent jack 8, the second intelligent jack 15, the main pumping station 1 and the auxiliary pumping station 19, the main pumping station 1 and the auxiliary pumping station 19 respectively pass through a plurality of oil pipes 4 and the first The intelligent jack 8 and the second intelligent jack 15 are connected together. Both the main pumping station 1 and the auxiliary pumping station 19 have a control cabinet, and a data acquisition instrument controlled by the control system is arranged in the control cabinet. The first intelligent jack 8 and the second intelligent jack The outer side of 15 is respectively provided with the first displacement sensor 7, the second displacement sensor ...

Embodiment 3

[0096] like image 3 , 12 , 13, and 14, that is, each pumping station is connected with one or two smart jacks, so as to realize symmetrical and synchronous tensioning of one or two bundles of steel strands at the same time, so as to improve the construction quality and work efficiency. image 3 In the shown structure, four smart jacks are used to stretch the continuous rigid structure box girder 20, wherein No. 1 and No. 3 smart tension jacks stretch a bundle of prestressed tendons, and No. 2 and No. 4 smart tension jacks Another bundle of prestressed tendons is stretched, No. 1 and No. 2 intelligent tension jacks are located at one end of the continuous rigid structure box girder 20, and No. 3 and No. 4 intelligent tension jacks are located at the other end of the continuous rigid structure box girder 20. The steps for checking the tension of different jacks in the secondary tension and the final tension are as follows: compare the tension values ​​of the intelligent tensio...

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Abstract

The invention provides a control method of an intelligent tension system and the intelligent tension system. The method is characterized by including the steps that a loading speed control unit is built and used for detecting pressure of an oil inlet, and the pressure, monitored in real time, of the oil inlet is compared with preset pretightening force of each stage; a prestressing tendon extending amount control unit is built and used for detecting the displacement value of a prestressed steel bar in real time in the tensioning process and the displacement value of the prestressed steel bar in set holdup time after the prestressed steel bar reaches set tension force of each stage; tensioning values of different jacks are compared after first-stage tension; control signals of different stage conditions in the tensioning process are converted into electromagnetic motions and frequency converter rotation speed control requirements; according to signals fed back by a pressure sensor and a displacement sensor in the tensioning process, the related control commands undergo fuzzy conditioning. The control method and the system have the advantages of improving data measuring precision and construction efficiency, reducing labor intensity of construction workers, reducing cost, improving labor efficiency, eliminating safety hidden risks of the construction workers, and enabling the whole tensioning process to be finished at a time.

Description

technical field [0001] The invention relates to the technical field of prestressed concrete engineering construction equipment, in particular to a control method of an intelligent tensioning system and the intelligent tensioning system. Background technique [0002] The quality of prestressed construction is the key process and the first condition to ensure the safety and durability of the structure. The traditional prestressed tensioning equipment and construction methods are all manually operated, and the pressure is adjusted and controlled by manually operating the handwheel control valve of the oil pump. The pressure value is read manually from the pressure gauge, and the steel strand is read manually using a steel ruler or tape measure. The elongation value of the line is measured, so the pressure error is large and the synchronization accuracy is low, especially the long-span box girder and rigid frame bridge that require multiple inversions. Because jacks and tool anc...

Claims

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Application Information

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IPC IPC(8): E04G21/12
Inventor 肖云唐祖文罗意钟黎海宁
Owner LIUZHOU QIAN BRIDGE ENG MATERIALS
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