CN101532140A - Preservative treatment method for suspension bridge main cable - Google Patents
Preservative treatment method for suspension bridge main cable Download PDFInfo
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- CN101532140A CN101532140A CN200910025687A CN200910025687A CN101532140A CN 101532140 A CN101532140 A CN 101532140A CN 200910025687 A CN200910025687 A CN 200910025687A CN 200910025687 A CN200910025687 A CN 200910025687A CN 101532140 A CN101532140 A CN 101532140A
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- main cable
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- main push
- towing rope
- suspension bridge
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Abstract
The invention discloses a preservative treatment method for a suspension bridge main cable. An exhaust pipe at an air supply part of a main cable sheath layer is provided with an exhaust valve so that air pressure in the clearance between an air inlet part and an exhaust part can be adjusted; and the air pressure in the clearance between the main cable and a protective sleeve is larger than the air pressure outside the cable. Dry air is supplied to the clearance among steel wires in the main cable by the air supply part, and then exhausted by the exhaust part so that the interior of the main cable forms a dry environment to prevent the steel wires from eroding. At the preliminary dehumidifying stage of the moist main cable, the exhaust valve is fully opened, and the dry air with large flow rate is delivered to quickly dehumidify; and at the later drying and maintaining stage of the main cable, the exhaust valve is fully or partially closed, the dry air with little flow rate can keep micro positive pressure in the main cable to prevent external moisture from entering from a gap on the sealed sheath layer of the main cable and ensure the requirement of internal dryness so as to save power consumption of a dehumidifying air supply system and prolong the service life of the dehumidifying air supply system.
Description
One, technical field
The present invention relates to a kind of method for anticorrosion treatment of main rope of suspension bridge, be used to remove the moisture of main push-towing rope inside, main push-towing rope inside is often kept dry.
Two, background technology
Main push-towing rope is one of most important primary structure member of suspension bridge, is called as " lifeline ", and its long-term exposure is in atmospheric environment, standing the erosion of various adverse environments, simultaneously, because main push-towing rope is non-exchange member, so the life-span of main push-towing rope directly influences the working life of suspension bridge.Open the rope inspection from the main push-towing rope of external many suspension bridges,, also thoroughly do not solve anticorrosion problem, even also cause the follow-up maintenance expense of great number in some cases though the anticorrosion mode of traditional main push-towing rope is effective in a short time.China's utility model patent " load-bearing with the corrosion protective device of cable " (patent No.: ZL01237379.6) proposed a kind of corrosion protective device of load-bearing usefulness cable, preferably resolve the anticorrosion problem of main rope of suspension bridge, the main push-towing rope that successfully has been used for Runyang Changjiang Highway Bridge is anticorrosion.But from the running condition analysis, this installs at very long main push-towing rope the later stage of drying maintenance phase, the plenum system high-speed cruising that still need dehumidify, and power consumption is bigger, also influence dehumidifying plenum system self life-span.
Three, summary of the invention
(1) goal of the invention
At the problem that will solve in the above-mentioned prior art, the objective of the invention is to propose a kind of method for anticorrosion treatment of main rope of suspension bridge, the realization main push-towing rope is anticorrosion, and at very long main push-towing rope the later stage of drying maintenance phase, the dehumidifying plenum system only needs low speed or intermittent operation, save power consumption, prolonged the life-span of dehumidifying plenum system.
(2) technical scheme
The object of the present invention is achieved like this: a kind of preservative system of main rope of suspension bridge, on the vapor pipe of the air feed part of main push-towing rope restrictive coating, a vent valve is set, and make between intake section and the exhaust portion air pressure in the gap adjustable.
Air pressure in described main push-towing rope and the protective sleeve gap is greater than the outer air pressure of cable.
After adopting said structure, in the moist dehumidifying stage at initial stage of main push-towing rope, vent valve standard-sized sheet on the exhaust portion vapor pipe, the dry air of big flow is delivered to the space of steel wire in the main push-towing rope by air feed part, discharge by the vapor pipe of exhaust portion then, make the wet environment of main push-towing rope inside be improved into dry environment fast; At main push-towing rope the later stage of drying maintenance phase, vent valve complete shut-down on the exhaust portion vapor pipe or part are closed, because the exhaust shock resistance of exhaust portion increases, making only needs the dry air of low discharge just can make the interior dry air pressure of main push-towing rope a little more than external atmosphere pressure (the extraneous blast force value that the malleation value is born greater than main push-towing rope restrictive coating appearance at least), form a kind of sealing gland effect, make the main push-towing rope restrictive coating have only " expiration ", there be not " air-breathing ", make the extraneous moisture can not be from the crack of main push-towing rope restrictive coating, micropore or minim gap enter main push-towing rope inside, guaranteed the inner exsiccant requirement of main push-towing rope, thereby reduced dehumidifying plenum system power consumption, also prolonged the life-span of dehumidifying plenum system.
Technique scheme also is applicable to anticorrosion with the cable of main rope of suspension bridge same structure or pipeline, the moisture protection of the large-scale enclosed busbar of using with the anticorrosion of cable with in power plant such as the buildings load-bearing etc.
(3) technique effect
The present invention has realized that main rope of suspension bridge is anticorrosion, and at very long main push-towing rope the later stage of drying maintenance phase, only needs the dry air of low discharge just can guarantee the inner exsiccant requirement of main push-towing rope, has saved dehumidifying plenum system power consumption, has prolonged the life-span of dehumidifying plenum system.The principle of the invention is simple, and technical scheme realizes easily.
Four, description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is an air feed part A-A cut-away view among Fig. 1.
Five, embodiment
Embodiments of the invention 1:
With reference to shown in Figure 1, embodiments of the invention 1: a kind of preservative system of main rope of suspension bridge, be included in main push-towing rope 1 outside and carry out longitudinally between appropriate gap of sealing sheath layer covering construction, be provided with the air feed part 2 and exhaust portion 3 that are used for covering inboard mediation, be provided with a vapor pipe 4 that vent valve 5 is housed on the exhaust portion 3 at least.Dry air is delivered to the gap of steel wire 7 in the main push-towing rope by the inlet pipe 6 on the above-mentioned air feed part 2, is discharged by the vapor pipe on the exhaust portion 34 then.
Above-mentioned dry gas is air or the nitrogen of relative humidity below 60%.The pressure range of above-mentioned dry gas remains in the withstand voltage scope of main push-towing rope outside sealing sheath.
As dry gas, use the little air ratio of relative humidity better as far as possible.During the environment of relative humidity below 60%, corrosion of metal speed is very slow.If as dry gas, then capable of purifying air, make steel wire reach anaerobic state, the better like this protection against corrosion task of having finished on every side with nitrogen.
After adopting said structure, in the 1 moist dehumidifying stage at initial stage of main push-towing rope, vent valve 5 standard-sized sheets on exhaust portion 3 vapor pipes 4, the dry air of big flow is delivered to the space of steel wire 7 in the main push-towing rope by air feed part 2, discharge by the vapor pipe 4 of exhaust portion 3 then, make the wet environment of main push-towing rope inside be improved into dry environment fast; At main push-towing rope 1 the later stage of drying maintenance phase, vent valve 5 complete shut-downs on exhaust portion 3 vapor pipes 4 or part are closed, because the exhaust shock resistance of exhaust portion 3 increases, making only needs the dry air of low discharge just can make the interior dry air pressure of main push-towing rope 1 a little more than external atmosphere pressure (the extraneous blast force value that the malleation value is born greater than main push-towing rope restrictive coating appearance at least), form a kind of sealing gland effect, make main push-towing rope 1 restrictive coating have only " expiration ", there be not " air-breathing ", make the extraneous moisture can not be from the crack of main push-towing rope 1 restrictive coating, micropore or minim gap enter main push-towing rope 1 inside, guaranteed main push-towing rope 1 inner exsiccant requirement, thereby reduced dehumidifying plenum system power consumption, prolonged the life-span of dehumidifying plenum system.
With reference to shown in Figure 2, air feed part 2 and exhaust portion 3 are respectively by round shape half tubes of material two ends be combined into.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1, a kind of method for anticorrosion treatment of main rope of suspension bridge is characterized in that: on the vapor pipe (4) of the air feed part (3) of main push-towing rope (1) restrictive coating a vent valve (5) is set, makes between intake section (2) and the exhaust portion (3) air pressure in the gap adjustable.
2, the method for anticorrosion treatment of a kind of main rope of suspension bridge according to claim 1 is characterized in that: the air pressure in described main push-towing rope (1) and the protective sleeve gap is greater than the outer air pressure of cable.
3, the method for anticorrosion treatment of a kind of main rope of suspension bridge according to claim 1 is characterized in that: air feed part (2) and exhaust portion (3) are respectively by round shape half tubes of material two ends be combined into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910025687A CN101532140A (en) | 2009-03-06 | 2009-03-06 | Preservative treatment method for suspension bridge main cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910025687A CN101532140A (en) | 2009-03-06 | 2009-03-06 | Preservative treatment method for suspension bridge main cable |
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| CN101532140A true CN101532140A (en) | 2009-09-16 |
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| CN200910025687A Pending CN101532140A (en) | 2009-03-06 | 2009-03-06 | Preservative treatment method for suspension bridge main cable |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561178A (en) * | 2010-12-29 | 2012-07-11 | 中交公路规划设计院有限公司 | Dehumidifying anti-corrosion system for lower anchor head of stayed-cable for cable-stayed bridge |
| CN103255715A (en) * | 2013-04-24 | 2013-08-21 | 河海大学 | Stay cable dehumidification and anticorrosion system |
| CN104652262A (en) * | 2015-01-27 | 2015-05-27 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Stayed cable beam anchorage region dehumidification system and stayed cable beam anchorage region dehumidification method |
| CN104818674A (en) * | 2015-03-13 | 2015-08-05 | 中交公路规划设计院有限公司 | Suspension bridge unbonded prestressed anchorage corrosion resistant method and structure |
| CN106592429A (en) * | 2016-12-16 | 2017-04-26 | 江苏中矿大正表面工程技术有限公司 | Suspension bridge main cable anti-corrosion device and method |
| CN111851298A (en) * | 2020-07-07 | 2020-10-30 | 北京赛亿科技有限公司 | Suspension bridge main cable dehumidification system utilizing ventilating steel pipe structure |
| CN112726431A (en) * | 2020-12-29 | 2021-04-30 | 中交公路规划设计院有限公司 | Main cable dehumidification corrosion prevention device |
-
2009
- 2009-03-06 CN CN200910025687A patent/CN101532140A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561178A (en) * | 2010-12-29 | 2012-07-11 | 中交公路规划设计院有限公司 | Dehumidifying anti-corrosion system for lower anchor head of stayed-cable for cable-stayed bridge |
| CN103255715A (en) * | 2013-04-24 | 2013-08-21 | 河海大学 | Stay cable dehumidification and anticorrosion system |
| CN104652262A (en) * | 2015-01-27 | 2015-05-27 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Stayed cable beam anchorage region dehumidification system and stayed cable beam anchorage region dehumidification method |
| CN104818674A (en) * | 2015-03-13 | 2015-08-05 | 中交公路规划设计院有限公司 | Suspension bridge unbonded prestressed anchorage corrosion resistant method and structure |
| CN106592429A (en) * | 2016-12-16 | 2017-04-26 | 江苏中矿大正表面工程技术有限公司 | Suspension bridge main cable anti-corrosion device and method |
| CN106592429B (en) * | 2016-12-16 | 2018-08-28 | 江苏中矿大正表面工程技术有限公司 | A kind of main rope of suspension bridge erosion protection system and method |
| CN111851298A (en) * | 2020-07-07 | 2020-10-30 | 北京赛亿科技有限公司 | Suspension bridge main cable dehumidification system utilizing ventilating steel pipe structure |
| CN112726431A (en) * | 2020-12-29 | 2021-04-30 | 中交公路规划设计院有限公司 | Main cable dehumidification corrosion prevention device |
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Open date: 20090916 |