WO2021208539A1 - Système et procédé de surveillance en ligne tout-temps de corrosion de câble en pont - Google Patents

Système et procédé de surveillance en ligne tout-temps de corrosion de câble en pont Download PDF

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Publication number
WO2021208539A1
WO2021208539A1 PCT/CN2021/071401 CN2021071401W WO2021208539A1 WO 2021208539 A1 WO2021208539 A1 WO 2021208539A1 CN 2021071401 W CN2021071401 W CN 2021071401W WO 2021208539 A1 WO2021208539 A1 WO 2021208539A1
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WO
WIPO (PCT)
Prior art keywords
corrosion
monitoring
box
cable
integrated
Prior art date
Application number
PCT/CN2021/071401
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English (en)
Chinese (zh)
Inventor
康壮苏
左新龙
倪雅
李紫跃
刘俊
许丽丽
Original Assignee
江苏中矿大正表面工程技术有限公司
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Publication date
Application filed by 江苏中矿大正表面工程技术有限公司 filed Critical 江苏中矿大正表面工程技术有限公司
Publication of WO2021208539A1 publication Critical patent/WO2021208539A1/fr

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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/203—Bridges

Definitions

  • the invention belongs to the technical field of bridge corrosion protection, and more specifically relates to an all-weather online monitoring system and method for bridge cable corrosion.
  • Cables are the main stress-bearing components of suspension bridges/cable-stayed bridges, which bear all the loads of the bridge and are not easy to replace during the entire service life of the bridge.
  • the cable steel wire and its protective layer will inevitably produce corrosion and damage, shorten the service life of the bridge, and make it difficult to evaluate the safety and reliability of the bridge. Therefore, in order to ensure the structural safety of the bridge and prevent the occurrence of operational accidents, it is necessary to conduct on-line corrosion monitoring of the bridge cables to ensure the safety of the bridge throughout its life.
  • the present invention provides a bridge cable corrosion all-weather online monitoring system and method, which can monitor the bridge cable corrosion rate status online in real time all-weather, and realize online collection of corrosion data of the bridge cable during service.
  • a bridge cable corrosion all-weather online monitoring system comprising: an integrated communication box and a monitoring integrated box, the monitoring integrated box is attached to the non-protective coating of the cable, and the integrated communication box is electrically connected to the monitoring integrated box.
  • sexual connection for signal data collection comprising: an integrated communication box and a monitoring integrated box, the monitoring integrated box is attached to the non-protective coating of the cable, and the integrated communication box is electrically connected to the monitoring integrated box.
  • the monitoring integrated box is arranged in an air clamp, an airtight waterproof head is installed on the air clamp, and a wire connecting the integrated communication box and the monitoring integrated box passes through the airtight and waterproof head.
  • the air clamp is arranged at the position of the cable inlet point and the cable outlet point.
  • the integrated communication box integrates a lightning arrester, an air switch, a power carrier communication module, a switching power supply, a resistance corrosion monitor, and a temperature and humidity monitor.
  • the monitoring integrated box is provided with a temperature and humidity sensor, a corrosion metal wire and a reference metal wire, the temperature and humidity sensor and the corrosion metal wire are both exposed outside the monitoring integrated box, and the reference metal wire It is embedded in the monitoring integrated box.
  • the temperature and humidity monitor is used to collect the signal of the temperature and humidity sensor
  • the resistance corrosion monitor is used to collect the signal of the corrosion metal wire and the reference metal wire, and transmit the adopted signal through the power carrier communication module To the bridge management center.
  • a method for all-weather online monitoring of bridge cable corrosion A monitoring integrated box is attached to the unprotected coating of the cable, an integrated communication box is arranged on the handrail rope of the cable, and the integrated communication box is integrated with the monitoring
  • the boxes are electrically connected to collect signal data, realize all-weather online monitoring of beam cable corrosion, and set up multiple corrosion monitoring points for all-round monitoring.
  • the resistance value R x of the corrosion metal wire leaking from the monitoring integrated box and the resistance value R f of the reference metal wire embedded in the monitoring integrated box are detected by the resistance corrosion monitor in the integrated communication box.
  • the temperature and humidity monitor in the communication box collects the signal of the temperature and humidity sensor leaked from the monitoring integrated box.
  • the ratio ⁇ (t) of the resistance value R x of the corrosion metal wire to the resistance value R f of the reference metal wire satisfies:
  • L x is the length of the corroded wire
  • L f is the length of the reference wire
  • r x (t) is the radius of the corroded wire
  • r f is the radius of the reference wire
  • t is the time of measurement
  • the corrosion rate V x of the corroded metal wire is derived from the formula (2):
  • the outdoor integrated communication box of the present invention integrates a lightning arrester, an air switch, a power carrier communication module, a switching power supply, a resistance corrosion monitor, and a temperature and humidity monitor, which is convenient for rapid installation at high altitude and can monitor the cable corrosion rate online in real time all-weather Status, realizing online collection of corrosion data during cable service.
  • the monitoring integrated box used in the bridge cable of the present invention is small in size and can be flexibly installed in the air clamp.
  • the cable is arranged in a circumferential direction to facilitate the horizontal comparison of the measurement points. It uses multiple cable inlet and exhaust ports in the longitudinal direction. Comparison of test points enables comprehensive and omni-directional monitoring of cable corrosion status.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • Figure 2 is a schematic diagram of the installation structure of the monitoring integrated box of the present invention.
  • Figure 3 is a schematic diagram of the structure of the monitoring integrated box of the present invention.
  • FIG. 4 is a construction drawing of the monitoring integrated box of the present invention.
  • Fig. 5 is a schematic diagram of the arrangement structure of the monitoring points of the present invention.
  • Fig. 6 is a graph showing the change curve of the resistance ratio of each corrosion monitoring point of the present invention.
  • Fig. 7 is a graph showing the corrosion rate change curve of each corrosion monitoring point of the present invention.
  • the present invention provides a bridge cable corrosion all-weather online monitoring system.
  • the cables 4 are connected on both sides of the bridge deck 5 and include: an integrated communication box 9 and a monitoring integrated box 12, integrated communication
  • the box 9 is arranged on the cable handrail rope, and the power is supplied through the 220V power line 8.
  • the monitoring integrated box 12 is attached to the unprotected coating 14 of the cable, and it is closely attached to the cable circumferential direction through a cable tie or fixing glue, and integrated communication
  • the box 9 is electrically connected to the monitoring integrated box 12 for signal data collection.
  • the monitoring integrated box 12 is arranged in the air clip 11, the air clip 11 is arranged at the cable inlet point 1 and the cable outlet point 2, and the air clip 11 is provided with a dry air inlet 10 to ensure The air in the air clip 11 circulates.
  • An airtight waterproof head 13 is installed on the air clamp 11, and the wire connecting the integrated communication box 9 and the monitoring integrated box 12 passes through the airtight waterproof head 13, which ensures the sealing of the monitoring system and improves the waterproof performance.
  • the integrated communication box 9 integrates lightning arrester, air switch, power carrier communication module, switching power supply, resistance corrosion monitor, temperature and humidity monitor, which is convenient for rapid installation at high altitude.
  • the monitoring integrated box 12 is provided with a temperature and humidity sensor 17, a corrosion metal wire 15 and a reference metal wire 16.
  • the wire 16 is embedded in the monitoring integrated box 12, and is not in contact with the external environment, and can be better compared with the corrosion resistance of the corroded metal wire 15 in the case of corrosion.
  • the thickness of the monitoring integrated box 12 can be 0.5 ⁇ 1mm.
  • the corrosion wire 15, the reference wire 16, and the temperature and humidity sensor 17 are integrated together. The size is small and can be flexibly installed at the cable inlet point 1, the cable outlet point 2. Clip 11 inside.
  • the temperature and humidity monitor is used to collect the signals of the temperature and humidity sensor 17, and the resistance corrosion monitor is used to collect the signals of the corrosion wire 15 and the reference wire 16, and transmit the adopted signals to the bridge management center through the power carrier communication module.
  • a method for all-weather online monitoring of bridge cable corrosion The monitoring integrated box 12 is attached to the unprotected coating 14 of the cable 4, the integrated communication box 9 is arranged on the handrail of the cable, and the integrated communication box 9 is connected to the monitoring The integrated box 12 is electrically connected for signal data collection to realize all-weather online monitoring of beam cable corrosion. Multiple corrosion monitoring points 3 are set for comprehensive monitoring. Corrosion monitoring is provided on the upstream main cable 6 and downstream main cable 7 of the cable. Point 3.
  • the present invention uses the resistance corrosion monitor in the integrated communication box 9 to detect the resistance value R x of the corrosion metal wire 15 leaking in the monitoring integrated box 12 and the resistance value R f of the reference metal wire 16 embedded in the monitoring integrated box 12 , Through the temperature and humidity monitor in the integrated communication box 9 to collect the signal leaked from the temperature and humidity sensor 17 of the monitoring integrated box 12.
  • the ratio ⁇ (t) of the resistance value R x of the corrosion metal wire 15 to the resistance value R f of the reference metal wire 16 satisfies:
  • L x is the length of the corrosion wire 15 and L f is the length of the reference wire 16; r x (t) is the radius of the corrosion wire 15 and r f is the radius of the reference wire 16; t is the measurement time Time; the radius r x (t) of the corrosion wire 15 will gradually decrease as the corrosion progresses, the reference wire 16 is in the enclosed probe body, and its radius r f remains unchanged.
  • the corrosion rate V x of the corroded wire 15 is derived from the formula (2):
  • the outdoor integrated communication box 9 of the present invention integrates a lightning arrester, an air switch, a power carrier communication module, a switching power supply, a resistance corrosion monitor, and a temperature and humidity monitor, which is convenient for high-altitude and fast installation, and can monitor the cable corrosion rate status online in real time all-weather. Realize the online collection of corrosion data during the service of the cable.
  • the monitoring integrated box 12 used in the bridge cable of the present invention has a small size and can be flexibly installed in the air clamp 11.
  • the cable circumferentially fitted arrangement is used to facilitate the horizontal comparison of the measurement points, and the multiple cable inlet and exhaust ports are used for longitudinal testing. Point comparison to achieve comprehensive and all-round monitoring of cable corrosion status.
  • the present invention is applied to the real bridge monitoring results of a cross-sea bridge.
  • a large amount of water remains in the cables.
  • the cable dehumidification system is operated. After dry air is passed to the inside of the cable, the relative humidity in the cable decreases within a period of time (0.5-1 year). A certain range, and remain below 50% for a long period of time. Therefore, the test results of the present invention can be seen: the instantaneous corrosion rate of corrosion wire 15 (5:57 on December 23, 2019): SS3, 14.66 ⁇ m/a, corrosion to 5:57 on December 31, 2019 The average rate is 5.727 ⁇ m/a.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

Sont divulgués un procédé et un système de surveillance en ligne tout temps de corrosion de câble en pont. Le système de surveillance comprend un boîtier de communication intégré et un boîtier intégré de surveillance, le boîtier intégré de surveillance étant fixé à la position d'un câble sans revêtement protecteur, et le boîtier de communication intégré étant électriquement connecté au boîtier intégré de surveillance pour effectuer une acquisition de données de signal. La présente invention peut réaliser une surveillance tout temps, en ligne et en temps réel de l'état de vitesse de la corrosion d'un câble en pont, ce qui permet d'obtenir une acquisition en ligne de données de corrosion dans le processus de service du câble en pont.
PCT/CN2021/071401 2020-04-17 2021-01-13 Système et procédé de surveillance en ligne tout-temps de corrosion de câble en pont WO2021208539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010307612.0 2020-04-17
CN202010307612.0A CN111505056A (zh) 2020-04-17 2020-04-17 一种桥梁缆索腐蚀全天候在线监测系统及方法

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Cited By (1)

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CN114002134A (zh) * 2021-11-01 2022-02-01 交科院公路工程科技(北京)有限公司 桥梁斜拉索腐蚀检测系统和方法

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CN111505056A (zh) * 2020-04-17 2020-08-07 江苏中矿大正表面工程技术有限公司 一种桥梁缆索腐蚀全天候在线监测系统及方法
CN113802457B (zh) * 2021-09-30 2023-03-28 江苏中矿大正表面工程技术有限公司 一种桥梁钢索多功能外层防护体系
CN113802458B (zh) * 2021-09-30 2022-12-13 江苏中矿大正表面工程技术有限公司 一种兼具防火防潮防盗功能的桥梁钢索防护体系

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114002134A (zh) * 2021-11-01 2022-02-01 交科院公路工程科技(北京)有限公司 桥梁斜拉索腐蚀检测系统和方法
CN114002134B (zh) * 2021-11-01 2024-01-09 交科院公路工程科技(北京)有限公司 桥梁斜拉索腐蚀检测系统和方法

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