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Internal stress monitoring system for railroad bridge

A monitoring system and technology for internal stress, applied in force/torque/work measuring instruments, measuring devices, instruments, etc., can solve problems such as failure to meet actual use needs, few stress monitoring devices for railway bridges, etc. The effect of large expansion and deformation ability

Active Publication Date: 2021-02-23
ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]With the improvement of my country's railway transportation network, the topography distribution and changes in the railway construction process are becoming more and more complex, and the railway bridges that can really adapt to complex environmental conditions There are few stress monitoring devices, and they often cannot meet the needs of actual use

Method used

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  • Internal stress monitoring system for railroad bridge
  • Internal stress monitoring system for railroad bridge
  • Internal stress monitoring system for railroad bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] combine figure 1 and figure 2 , an internal stress monitoring system for railway bridges, comprising a fixed plate 200 and a force-applying mechanism 100 arranged on the fixed plate 200, one force-applying mechanism 100 is provided, and the one force-applying mechanism 100 is arranged along the fixed plate 200 radial setting.

[0040] The force applying mechanism 100 includes a cylinder 1, a screw rod 2, a support rod 4 and a stress sensor 9, the support rod 4 and the cylinder 1 are all bolted on the fixed plate 200, and the outside of the screw rod 2 is provided with a guide cylinder 3 , the guide cylinder 3 is fixedly connected to the fixed plate 200 by bolts, one end of the screw 2 is connected to the output end of the cylinder 1, and the other end of the cylinder 1 is connected to the stress sensor 9 through the lead block 7, and the stress sensor A mounting frame 8 is provided outside the side of the device 9 facing the support rod 4, the guide block 7 and the g...

Embodiment 2

[0043] combine figure 2 , two force-applying mechanisms 100 are provided, and the two force-applying mechanisms 100 are arranged along the radial direction of the fixed plate 200, and the stress sensors 9 of the two force-applying mechanisms 100 are intersected at 90°, and can be monitored simultaneously Horizontal stress and vertical stress, a certain stress sensing probe 10 of two stress sensors 9 is aimed at the vertical direction, and another stress sensing probe 10 is then aimed at the horizontal direction, and the stress sensor is slowed down with the screw rod 2 and the lead block 7 9 is slowly sent to the designated position, and the two stress-sensing probes 10 are pressurized and monitored respectively.

Embodiment 3

[0045] combine image 3 , there are three force applying mechanisms 100, and two of the three force applying mechanisms 100 are distributed along the radial direction of the fixed disk 200, and the stress sensors 9 of the two force applying mechanisms 100 are at 90° Intersecting arrangement, the other of the three force-applying mechanisms 100 is arranged along the central axis of the fixed disk 200, and any stress induction probe 10 of the two radial stress induction probes 10 of the stress inductor 9 in three directions is paired quasi-vertical direction, the other radial stress sensing probe 10 is aimed at the horizontal direction, and the three-way stress sensing probe 9 is slowly sent into the bottom of the hole with the screw 2. When pressurizing, pressurize the two stress sensing probes 10 respectively , and finally inject pressure on the radial stress sensing probe 10, and monitor after the injection pressure is completed.

[0046] During the measurement process, the ...

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Abstract

The invention relates to an internal stress monitoring system for a railroad bridge. The system comprises a fixed disc and a stress application mechanism arranged on the fixed disc; the stress application mechanism comprises an air cylinder, a screw rod, supporting rods and a stress sensor; one end of the screw rod is connected with the output end of the air cylinder; the other end of the air cylinder is connected to the stress sensor through a lead block; and the two sides of the stress sensor are slidably connected to sliding sleeves of the supporting rods through guide rods. The internal stress monitoring system provided by the invention can be used for detecting the internal stress change of the bridge, predicting the abnormality of the bridge in advance and analyzing the deformation of the bridge, thereby preventing risks in advance and providing a maintenance basis for the safe operation of the bridge and a large-scale building.

Description

technical field [0001] The invention belongs to the technical field of railway safety monitoring, and in particular relates to an internal stress monitoring system for railway bridges. Background technique [0002] Railway bridges are structures built by railways across rivers, lakes, straits, valleys or other obstacles, and to realize the three-dimensional intersection of railway lines and railway lines or roads. Railway bridges have large loads, large impact forces, and high traffic density. The standard of resisting natural disasters is high, especially the structure requires certain vertical and lateral stiffness and dynamic performance. [0003] Internal stress refers to the internal force that interacts between the various parts of the object when the object is deformed due to external factors (force, humidity change, etc.), so as to resist the effect of this external factor and try to make the object change from the deformed Returning to the position before deformati...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/0047
Inventor 李巍
Owner ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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