CN106592429B - A kind of main rope of suspension bridge erosion protection system and method - Google Patents

A kind of main rope of suspension bridge erosion protection system and method Download PDF

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Publication number
CN106592429B
CN106592429B CN201611169062.0A CN201611169062A CN106592429B CN 106592429 B CN106592429 B CN 106592429B CN 201611169062 A CN201611169062 A CN 201611169062A CN 106592429 B CN106592429 B CN 106592429B
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nitrogen
air inlet
main push
towing rope
automatic control
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CN106592429A (en
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李鹏
刘俊
王波
赵青青
倪雅
杨帆
高海棠
周春侠
刘国彬
陈天建
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JIANGSU CUMT DAZHENG SURFACE ENGINEERING TECHNOLOGY CO LTD
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JIANGSU CUMT DAZHENG SURFACE ENGINEERING TECHNOLOGY CO LTD
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/16Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Drying Of Solid Materials (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention discloses a kind of main rope of suspension bridge erosion protection system and method, which includes suit air inlet folder and exhaust clip, and dehumidify the equipment of making nitrogen, automatic control system;Temperature Humidity Sensor is installed respectively, each Temperature Humidity Sensor connects automatic control system in inlet and outlet folder;Air inlet presss from both sides and is equipped with normally open type magnetic valve at air inlet, and exhaust clip exhaust ports are equipped with normally closed solenoid valve, and normally opened, normally closed solenoid valve connects automatic control system;The dehumidifying equipment of making nitrogen includes Dehumidifying element and nitrogen unit processed, and the exhaust outlet of the two, which is connected in parallel to after three-way control valve, to be pressed from both sides air inlet with air inlet and be connected, and the two is separately connected automatic control system.The present apparatus can monitor the humidity and oxygen content according to main push-towing rope inner space, and automatically select the operational mode of the dehumidifying equipment of making nitrogen, make to be flooded with the dry gas that nitrogen gas purity is higher than 99% inside main push-towing rope, substantially prolong the service life of bridge.

Description

A kind of main rope of suspension bridge erosion protection system and method
Technical field
The present invention relates to a kind of main rope of suspension bridge erosion protection system and methods, belong to bridge life-cycle protection technology field.
Background technology
Main push-towing rope is the lifeline of suspension bridge, is made of multi beam steel tendon, and steel tendon is by multiply high-strength galvanized steel wire group At.Since suspension bridge use environment is severe, mostly hot humid environment, the corrosion for the service life of guarantee bridge, main push-towing rope is anti- It protects particularly important.The corrosion rate of main push-towing rope is determined that the presence with humidity, temperature and hazardous medium has by the environment residing for it It closes.Such as:Humidity is as deciding factor, and when the relative humidity of air is below 60%, the corrosion of main push-towing rope is very slight;But When relative humidity increases to a certain numerical value, the corrosion rate of main push-towing rope will increase suddenly, this numerical value is known as critical humidity.When In normal temperature environment, under the action of moisture in an atmosphere, oxygen and other pollutants, electrochemical corrosion occurs for main push-towing rope steel wire, i.e., Steel wire constitutes the anode of primary battery, and occurring to chemically react with water, the oxygen in air becomes iron rust, and iron rust can absorb a large amount of water Point, cause rusty scale volume expansion that corrosion is made to continue to expand to inside;In hot environment, chemical corruption can occur for main push-towing rope steel wire After erosion, i.e. metal and dry air contact, surface can generate the compounds such as chloride, sulfide, oxide, to be formed to steel The chemical attack of silk, and the moisture film of steel wire surface is also the principal element for accelerating this process.
In the prior art, it is real to mostly use the mode for controlling inner air relative humidity for the erosion protection system of main rope of suspension bridge Existing anti-corrosion protection purpose, by constantly removing the content of water vapor in air, to avoid causing in steel wire surface formation moisture film Steel wire corrodes.Such method has certain effect for slowing down the corrosion rate of main push-towing rope, but with the increase of bridge service phase, main The corrosion rate of cable can also gradually increase, and not only shorten the service life of bridge, but also also constitute prestige for the safety of entire bridge The side of body.Also, there is no realizations to automatically control for traditional bridge dehumidifying anti-corrosion method, and dehumidification system is in the shape of continuous operation State causes the energy and greatly wastes.
In conclusion for the shortcoming of above main push-towing rope dehumidifying anti-corrosion method, if can have a kind of device can be from root The etching problem of main rope of suspension bridge is solved in sheet, and can be realized by using automatic control system, it will be with great research Meaning.
Invention content
For above-mentioned existing technical problem, a kind of main rope of suspension bridge erosion protection system of present invention offer and method utilize Automatic control system realizes dehumidifying and the automatic switchovers of two kinds of functions of nitrogen processed, is higher than to provide a nitrogen gas purity inside main push-towing rope 99% environment not corroded, fundamentally to solve the etching problem of main rope of suspension bridge.
To achieve the above object, the present invention provides a kind of main rope of suspension bridge erosion protection system, including is sleeved on main push-towing rope Air inlet folder and exhaust clip, dehumidify the equipment of making nitrogen, and the automatic control system equipped with PLC;
It is separately installed with Temperature Humidity Sensor in the inlet and outlet folder, each Temperature Humidity Sensor passes through RS485 respectively Connection connects the PLC serial ports of automatic control system;
Normally open type magnetic valve is equipped at the air inlet of the air inlet folder, the exhaust ports of exhaust clip are equipped with normally closed type electromagnetism Valve, and normally opened, normally closed solenoid valve connects the PLC output ends of automatic control system by the control terminal of A.C. contactor respectively;
The dehumidifying equipment of making nitrogen includes Dehumidifying element and nitrogen unit processed, and the exhaust outlet of the two is connected in parallel to three-way control valve Afterwards, it is connected with the air inlet that air inlet is pressed from both sides by pipeline, and the two is automatically controlled by the connection of the control terminal of A.C. contactor respectively The PLC output ends of system.
Further, the Dehumidifying element is mainly sequentially connected by rotary dehumidifier, booster fan and is formed.
Further, the nitrogen unit processed mainly by air compressor, cooling driers, air cleaning facility, nitrogen making machine successively Connection composition.Further, the exhaust outlet of the nitrogen making machine carries pressure-regulating valve door, and the outlet pressure of nitrogen making machine is 0.1- The gas pressure of 0.6MPa, pressure-regulating valve door are adjusted to 4-6KPa.
Further, the main push-towing rope is sealed by the way of being wrapped band or fluid sealant.
The present invention provides a kind of anti-corrosion method of above-mentioned apparatus again, comprises the following specific steps that:
(One)Monitor the relative humidity and oxygen content in inlet and outlet folder in real time using Temperature Humidity Sensor, it is each when detecting When the peak of the relative humidity in a exhaust clip >=45%, automatic control system opens Dehumidifying element, and normally closed solenoid valve is logical Electricity, exhaust clip are opened;The dry gas that Dehumidifying element generates at this time enters main push-towing rope space by air inlet folder, while in main push-towing rope space Original gas is discharged by exhaust clip;
(Two)In Dehumidifying element operational process, as the peak < 45% for detecting the relative humidity in each exhaust clip When, automatic control system closes Dehumidifying element, and opens nitrogen unit processed, and normally closed solenoid valve remains powered on, and exhaust clip is kept It opens;Nitrogen of the purity that nitrogen unit processed generates at this time higher than 99% enters main push-towing rope space by air inlet folder, while in main push-towing rope space Original gas continues through exhaust clip discharge;
(Three)In nitrogen unit operational process processed, when detecting the peak < 1% of the oxygen content in each exhaust clip, Automatic control system closes nitrogen unit processed, and normally closed solenoid valve powers off, and is vented clip closure;Nitrogen to be flooded with inside main push-towing rope pure at this time Dry gas of the degree higher than 99%, and be isolated with outside air.
Main rope of suspension bridge erosion protection system of the present invention utilizes Automatic Control Theory, passes through the temperature in being pressed from both sides mounted on inlet and outlet Humidity sensor monitors the humidity and oxygen content of main push-towing rope inner space in real time, and collected data are sent to Automatic control system is handled and is fed back, to automatically select the operational mode of the dehumidifying equipment of making nitrogen.When main push-towing rope space is opposite When the peak of humidity >=45%, automatic control system selects Dehumidifying element operational mode;When the highest of main push-towing rope space relative humidity When value < 45%, automatic control system automatically switches to nitrogen unit operational mode processed;As the peak < 1% of main push-towing rope space oxygen content When, automatic control system nitrogen unit processed out of service, and exhaust clip is closed, and make due to air inlet folder is connected with the dehumidifying equipment of making nitrogen The stable gas pressure for obtaining air inlet, to ensure that main push-towing rope space interior completely cuts off with outside air, gas pressure is constant, and maintenance one is not The environment corroded.
In conclusion present invention is mainly applied on bridge, it is different from traditional air dehumidification method, introducing automatically controls System makes the moisture in the air being passed through in main push-towing rope be removed completely, and oxygen content falls below 1%, and with drying, clean High nitrogen substitutes the raw-gas in main push-towing rope space, and a ring that corrosion reaction can not occur is created for bridge cable steel construction Border fundamentally solves the problems, such as that electrochemical corrosion occurs for bridge cable steel construction, is a kind of long-acting bridge anti-corrosion method.
In traditional bridge dehumidifying Corrosion prevention scheme, since the conveying gas capacity of dehumidification system is limited, air inlet folder, exhaust clip Mounting distance is greatly increased than comparatively dense, not only cost, and installation is time-consuming and laborious, also has centainly for the effect on moisture extraction of cable entirety Influence.Compared with the prior art, the invention has the advantages that:
1, the packing density of air inlet folder, exhaust clip is reduced, the mounting distance of air inlet folder and exhaust clip can be by original 200 Rice extends to 2000 meters or more so that the gas fed distance inside main push-towing rope greatly prolongs, and to save the energy, reduces into This, improves arrangement efficiency.
2, the humidity and oxygen content according to main push-towing rope inner space can be monitored in real time, and automatically select the dehumidifying equipment of making nitrogen Operational mode realizes the automatic switchover of dehumidifying and two kinds of functions of nitrogen processed, simplifies manual operation, improve main push-towing rope internal gas The accuracy of quality control.
When dry gas of the nitrogen gas purity higher than 99% 3, can be flooded with inside main push-towing rope, passes through and control normally opened, normally closed type Solenoid valve and form closed environment, and keep the gas pressure inside main push-towing rope, fundamentally prevent the corrosion of main push-towing rope, greatly prolong Service life of bridge.
Description of the drawings
Fig. 1 is the general arrangement of apparatus of the present invention;
Fig. 2 is the control principle drawing of the method for the present invention;
In figure:1, air inlet is pressed from both sides, and 2, exhaust clip, 3, conveyance conduit, 4, upper beam, 5, the dehumidifying equipment of making nitrogen, 61, two end bays One, 62, two end bays two, 7, in across.
Specific implementation mode
With reference to embodiment and attached drawing, the invention will be further described, but does not constitute the concrete restriction to the present invention.
As shown in Fig. 2, apparatus of the present invention include the air inlet folder 1 being sleeved on main push-towing rope and exhaust clip 2, dehumidify the equipment of making nitrogen 6, And the automatic control system equipped with PLC.
Wherein:It is separately installed with Temperature Humidity Sensor in inlet and outlet folder 1,2, each Temperature Humidity Sensor passes through respectively RS485 connections connect the PLC serial ports of automatic control system.Wherein, Temperature Humidity Sensor at air inlet folder 1 predominantly detects pair As if it is sent into the relative humidity and oxygen content of the gas in main push-towing rope space, it can reflect the workability of Dehumidifying element and nitrogen unit processed Can, reference is provided for staff, is convenient for follow-up maintenance.The object that predominantly detects of Temperature Humidity Sensor is main push-towing rope at exhaust clip 2 Relative humidity and oxygen content and the present apparatus parameter index to be controlled of the gas of inner space.
Normally open type magnetic valve is equipped at the air inlet of air inlet folder 1, the exhaust ports of exhaust clip 2 are equipped with normally closed solenoid valve, And normally opened, normally closed solenoid valve connects the PLC output ends of automatic control system by the control terminal of A.C. contactor respectively.
The equipment of making nitrogen 5 that dehumidifies includes Dehumidifying element and nitrogen unit processed, wherein Dehumidifying element mainly by rotary dehumidifier plus Pressure fan is sequentially connected composition.Nitrogen unit processed is mainly connected by air compressor, cooling driers, air cleaning facility, nitrogen making machine successively Connect composition.The exhaust outlet of nitrogen making machine carries pressure-regulating valve door, and the outlet pressure of nitrogen making machine is 0.1-0.6MPa, pressure-regulating valve The gas pressure of door is adjusted to 4-6KPa.
After the exhaust outlet of Dehumidifying element and nitrogen unit processed is connected in parallel to three-way control valve, pass through the air inlet of pipeline and air inlet folder 1 Mouth is connected, and the two passes through the PLC output ends that the control terminal of A.C. contactor connects automatic control system respectively.
Embodiment 1:
As shown in Figure 1, being sealed using fluid sealant outside main rope of suspension bridge, inside forms a confined space;Two end bays one, 2 61,62 be respectively 360m, 480m, and cable diameter is 852mm;In across 7 be 1200m, cable diameter 852mm.
When implementation, which need to install two sets of erosion protection systems of the present invention:One is installed respectively at two upper beams 4 A dehumidifying nitrogen corrosion protection equipment 5 processed;It is set with an air inlet folder 1 on each cable of two end bays one, 2 61,62 and two are located at The exhaust clip 2 of its both sides;In press from both sides 1, five exhaust clip 2, and air inlet folder 1 and row across being set with four air inlets on 7 each cable Gas folder 2 is alternately arranged.
According to the characteristic of main rope of suspension bridge, two end bays one, 2 61,62 supply gas distance be respectively 180m, 240m, in across 7 Supply gas distance be 150m, select the gas output of rotary dehumidifier for 1500 m3The outlet pressure of/h, booster fan are 4KPa, The gas production of air compressor is 2.5m3The outlet pressure of/min, outlet pressure 0.85MPa, nitrogen making machine are 0.1-0.6MPa, The adjusting pressure of outlet pressure regulating valve door is 4-6KPa.
When apparatus of the present invention power transmission works, exhaust clip is normally closed, and normally opened, the collected main push-towing rope of Temperature Humidity Sensor is pressed from both sides in air inlet The humidity of inner space and the signal of oxygen content are sent to by RS485 connections in the PLC of automatic control system, and data are passed through Processing, PLC send out control signal, the operational mode of the selection dehumidifying equipment of making nitrogen.It is relatively wet at each exhaust clip 2 when detecting When the peak of degree >=45%, PLC sends out control signal to select Dehumidifying element operational mode, while and normally closed solenoid valve It is powered, exhaust clip is opened, and the gas that Dehumidifying element generates is delivered to by conveyance conduit 3 shown in FIG. 1 and air inlet folder 1 in main push-towing rope Raw-gas inside main push-towing rope is discharged by exhaust clip 2 in portion.When the peak for detecting the relative humidity at each exhaust clip 2 When < 45%, PLC sends out control signal to switch to nitrogen unit operational mode processed, while and normally closed solenoid valve remain powered on, Exhaust clip stays open, and nitrogen unit processed will generate nitrogen of the purity higher than 99% and pass through conveyance conduit 3 as shown in Figure 1 and air inlet Folder 1 is delivered to inside main push-towing rope, and raw-gas inside main push-towing rope is discharged by exhaust clip 2.When detecting oxygen content at each exhaust clip Peak < 1% when, PLC, which sends out signal and controls nitrogen unit processed, is automatically stopped operation, while normally closed solenoid valve powers off, and is vented Clip closure, thus main push-towing rope inner space is isolated with outside air, and internal gas pressure is in the work of air inlet folder 1 and exhaust clip 2 It is remained unchanged under, forms an environment that can not corrode.
Embodiment 2:
Complete layout is similar with Fig. 1.It is sealed using the band mode that is wrapped outside main rope of suspension bridge, inside formation one is closed Space need to install two sets of erosion protection systems of the present invention.Wherein, two end bays one, 2 61,62 are respectively 460m, 491m, cable diameter point Not Wei 886mm, 901mm, an air inlet folder 1 is respectively set in each cables of two end bays and two are located at the exhausts that 1 both sides are pressed from both sides in air inlet Folder 2.In across for 1480m, cable diameter 886mm, in across each cable four air inlets be respectively set press from both sides 1, five exhaust clip 2, and Air inlet folder 1 and exhaust clip 2 are alternately arranged.One dehumidifying nitrogen corrosion protection equipment 5 processed is installed respectively at two upper beams 4.
According to the characteristic of main rope of suspension bridge, two end bays one, 2 61,62 supply gas distance be respectively 230m, 245.5m, in across Distance of supplying gas is 185m, selects the gas output of rotary dehumidifier for 1500 m3The outlet pressure of/h, booster fan are 4KPa, empty The gas production of air compressor is 2.5m3The outlet pressure of/min, outlet pressure 0.85MPa, nitrogen making machine are 0.1-0.6MPa, are gone out The adjusting pressure of mouth pressure-regulating valve door is 4-6KPa.
The present apparatus course of work is similar to Example 1, when the peak for detecting the relative humidity at each exhaust clip 2 >= When 45%, is being dehumidified to outdoor air, after compression processing first with present apparatus Dehumidifying element, is obtaining the air of dried and clean, It is passed through main push-towing rope space by gas transmission pipeline 3.When detecting the peak < 45% of the relative humidity at each exhaust clip 2, After recycling nitrogen unit compresses outdoor air, by cooling driers, air cleaning facility, the sky of dried and clean is obtained Gas, then by the equipment of making nitrogen, oxygen is removed, so that nitrogen gas concn is higher than 99%, finally obtain the high nitrogen of hypoxemia of dried and clean, And main push-towing rope space is passed through by gas transmission pipeline 3, until detecting the peak < 1% of oxygen content at each exhaust clip.It is above-mentioned Two steps so that original humid air is replaced by the gas of drying, high nitrogen in closed bridge main push-towing rope, in such environmental theory It can be prevent completely the corrosion of steel construction, to greatly improve the service life of bridge.
And dehumidifying, under nitrogen pattern processed, the normally closed solenoid valve at exhaust clip is powered always so that exhaust clip holding is beaten It opens, facilitates the exclusion of main push-towing rope inner space raw-gas, while the normally open type magnetic valve at air inlet folder powers off always so that air inlet is pressed from both sides It stays open, gas and high-purity nitrogen after dehumidifying is facilitated to be passed through inside main push-towing rope.
After the present apparatus is stopped, normally opened, normally closed solenoid valve powers off, and is vented clip closure, prevents the gas in main push-towing rope Body circulates with extraneous;And air inlet folder is still opened, and because it is directly connected with the dehumidifying equipment of making nitrogen, by the pressure influence of the equipment, therefore And inlet pressure is stablized, and the gas in main push-towing rope will not be made to circulate with extraneous.So that main push-towing rope inner space formation one is close The environment closed, and main push-towing rope by concentration higher than 99% nitrogen surround and from corrosion.
In addition, the layout of each component of the present apparatus, Yi Jizhuan can be adjusted according to ambient humidity, length of warping winch and control standard Take turns dehumidifier, booster fan, air compressor, the particular technique parameter of the equipment of making nitrogen and the adjustable range of outlet pressure.
Above be specific implementation method, it is all within the scope of the spirit and principles in the present invention made by it is any modification, equally replace It changes and improves, should all be included in the protection scope of the present invention.

Claims (6)

1. a kind of main rope of suspension bridge erosion protection system, which is characterized in that including the air inlet folder being sleeved on the main push-towing rope of sealing(1)With Exhaust clip(2), dehumidify the equipment of making nitrogen(5), and the automatic control system equipped with PLC;
The inlet and outlet folder(1、2)It is inside separately installed with Temperature Humidity Sensor, each Temperature Humidity Sensor passes through respectively RS485 connections connect the PLC serial ports of automatic control system;
The air inlet folder(1)Air inlet at be equipped with normally open type magnetic valve, exhaust clip(2)Exhaust ports be equipped with normally closed type electricity Magnet valve, and normally opened, normally closed solenoid valve connects the PLC outputs of automatic control system by the control terminal of A.C. contactor respectively End;
The dehumidifying equipment of making nitrogen(5)Including Dehumidifying element and nitrogen unit processed, the exhaust outlet of the two is connected in parallel to three-way control valve Afterwards, it is pressed from both sides by pipeline and air inlet(1)Air inlet be connected, and the two passes through the automatic control of the control terminal of A.C. contactor connection respectively The PLC output ends of system processed;
The humidity and oxygen content of main push-towing rope inner space are carried out by the Temperature Humidity Sensor in being pressed from both sides mounted on inlet and outlet real-time Monitoring, and collected data are sent to automatic control system and is handled and is fed back, to automatically select dehumidifying nitrogen The operational mode of equipment;When the peak of main push-towing rope space relative humidity >=45%, automatic control system selects Dehumidifying element operation Pattern;As the peak < 45% of main push-towing rope space relative humidity, automatic control system automatically switches to nitrogen unit operation mould processed Formula;As the peak < 1% of main push-towing rope space oxygen content, automatic control system nitrogen unit processed out of service, and exhaust clip is closed, And make the stable gas pressure of air inlet due to air inlet presss from both sides and is connected with the equipment of making nitrogen that dehumidifies, to ensure main push-towing rope space interior and the external world Air exclusion, gas pressure is constant, maintains an environment not corroded.
2. a kind of main rope of suspension bridge erosion protection system according to claim 1, which is characterized in that the Dehumidifying element master It to be sequentially connected and be formed by rotary dehumidifier, booster fan.
3. a kind of main rope of suspension bridge erosion protection system according to claim 1 or 2, which is characterized in that the nitrogen list processed Member, which is mainly sequentially connected by air compressor, cooling driers, air cleaning facility, nitrogen making machine, to be formed.
4. a kind of main rope of suspension bridge erosion protection system according to claim 3, which is characterized in that the row of the nitrogen making machine Gas port carries pressure-regulating valve door, and the outlet pressure of nitrogen making machine is 0.1-0.6MPa, and the gas pressure of pressure-regulating valve door is adjusted For 4-6KPa.
5. a kind of main rope of suspension bridge erosion protection system according to claim 1 or 2, which is characterized in that the main push-towing rope is adopted It is sealed with the mode of be wrapped band or fluid sealant.
6. a kind of anti-corrosion method according to any one of claim 1-5 described devices, which is characterized in that including following specific step Suddenly:
(One)Monitor inlet and outlet folder in real time using Temperature Humidity Sensor(1、2)Interior relative humidity and oxygen content, it is each when detecting A exhaust clip(2)When the peak of interior relative humidity >=45%, automatic control system opens Dehumidifying element, and normally closed type electromagnetism Valve is powered, exhaust clip(2)It opens;The dry gas that Dehumidifying element generates at this time is pressed from both sides by air inlet(1)Into main push-towing rope space, simultaneously Raw-gas in main push-towing rope space passes through exhaust clip(2)Discharge;
(Two)In Dehumidifying element operational process, when detecting each exhaust clip(2)The peak < 45% of interior relative humidity When, automatic control system closes Dehumidifying element, and opens nitrogen unit processed, and normally closed solenoid valve remains powered on, exhaust clip(2)It protects Hold opening;Nitrogen of the purity higher than 99% that nitrogen unit processed generates at this time is pressed from both sides by air inlet(1)Into main push-towing rope space, while main push-towing rope Raw-gas in space continues through exhaust clip(2)Discharge;
(Three)In nitrogen unit operational process processed, when detecting each exhaust clip(2)When the peak < 1% of interior oxygen content, from Autocontrol system closes nitrogen unit processed, and normally closed solenoid valve powers off, exhaust clip(2)It closes;At this time nitrogen is flooded with inside main push-towing rope Purity is higher than 99% dry gas, and is isolated with outside air.
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CN107366228A (en) * 2017-07-25 2017-11-21 西南交通大学 For the air drying methods of main rope of suspension bridge, system and air duct
CN108797392A (en) * 2018-05-31 2018-11-13 中交公路规划设计院有限公司 A kind of novel bridge Active Anticorrosion method
CN109140995A (en) * 2018-08-20 2019-01-04 江苏中矿大正表面工程技术有限公司 A kind of main rope of suspension bridge removal moisture drying system and detection device
CN108824231A (en) * 2018-09-04 2018-11-16 中智桥康(武汉)科技有限公司 It is a kind of with inert gas maintenance main rope of suspension bridge protective system and its maintenance anti-corrosion mode implementation method
CN111945562B (en) * 2020-08-12 2022-07-01 郑州大学 Dehumidification method of main cable of suspension bridge
CN114395982A (en) * 2022-01-24 2022-04-26 中国矿业大学 Liquid nitrogen supply system with corrosion inhibition and fire extinguishing functions for bridge steel cable

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