CN111827114A - Cable-stayed bridge inhaul cable dehumidification system utilizing ventilating steel pipe structure - Google Patents
Cable-stayed bridge inhaul cable dehumidification system utilizing ventilating steel pipe structure Download PDFInfo
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- CN111827114A CN111827114A CN202010769925.8A CN202010769925A CN111827114A CN 111827114 A CN111827114 A CN 111827114A CN 202010769925 A CN202010769925 A CN 202010769925A CN 111827114 A CN111827114 A CN 111827114A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- 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
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- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The stay cable of the cable-stayed bridge is a main stressed component of the cable-stayed bridge, and the durability of the stay cable directly influences the structural safety of the cable-stayed bridge. The invention provides a cable-stayed bridge cable dehumidification system utilizing a ventilating steel pipe structure, which comprises: the system comprises a guy cable with a ventilation steel pipe structure, a dehumidifying gas generating system, a sensor and actuator system, a monitoring and controlling system and an air exhaust monitoring system. The dehumidification system can enable the steel wires in the cable body to be in a dry environment, thereby preventing the steel wires in the cable body from being corroded and improving the durability and reliability of the cable-stayed bridge cable.
Description
Technical Field
The invention relates to the field of a cable-stayed bridge cable dehumidification system, in particular to a cable-stayed bridge cable dehumidification system utilizing a ventilating steel pipe structure.
Background
The cable-stay bridge cable is the main atress component of cable-stay bridge, traditional cable-stay bridge cable structure is formed according to 3 ~4 twist angle twists with many high strength galvanized steel wires, the crowded double-deck high density polyethylene sheath of steel wire external heating, the uranium utensil is installed at both ends, and adopt the totally enclosed cable-stay bridge cable structure that the sealed system of multilayer formed, prevent that water and other harmful substance from getting into the cable body, corrode the steel wire, influence the durability and the reliability of cable-stay bridge cable. The prior art mainly adopts the method that anticorrosive grease is poured into the cable body for protection. The high-density polyethylene sheath inevitably causes damage in the construction and service process, so that water or other harmful substances enter a cable body to cause corrosion of a steel wire, even the conditions of wire breakage, cable breakage and the like are generated, and the cable-stayed bridge cable is caused to lose efficacy. These all leave the potential safety hazard for the safe service of cable-stay bridge cable.
Aiming at the problems in the existing cable-stayed bridge cable dehumidification and corrosion prevention technology, the invention provides a cable-stayed bridge cable dehumidification system with a ventilation steel pipe structure, which enables steel wires in a cable body to be in a dry environment, thereby preventing the corrosion of the steel wires in the cable body, improving the durability and reliability of the cable-stayed bridge cable and prolonging the service life of the cable-stayed bridge.
The invention provides a cable-stayed bridge cable dehumidification system utilizing a ventilation steel pipe structure, wherein the ventilation steel pipe in the cable has a special structure, material and manufacturing process, galvanic corrosion cannot occur, the distribution of an air inlet and an air outlet is more reasonable and uniform, and dehumidification gas can be fed into the cable while the performance of the cable is considered. Dehumidification equipment, sensor and executor equipment are mutual with the monitoring control system, except basic automatic control units such as sensor data monitoring, sensor data and equipment status display, automatically regulated and control among the monitoring control system, can also long-range visit multi-terminal cloud monitoring platform in real time, through self-defined early warning propelling movement function, in time the early warning improves dehumidification efficiency, reduces fortune dimension cost.
Disclosure of Invention
The invention provides a cable-stayed bridge cable dehumidification system using a ventilation steel pipe structure, which is a suspension bridge main cable dehumidification system using a specially-made ventilation steel pipe cable structure as a main body, cooperating with a dehumidification gas generation system, a sensor and an actuator system to dehumidify a cable-stayed bridge cable under the control of a control system, and early warning through a cloud platform monitoring system.
Specifically, an utilize steel pipe structure's cable-stay bridge cable dehumidification system of ventilating, purpose-made cable structure accords with the cable-stay bridge cable structure of one kind utilization steel pipe dehumidification of ventilating of patent: 202010392707.7 [ 2020-05-11 ].
Specifically, the dehumidifying gas generating system comprises a dehumidifier or a nitrogen generator, an air extractor, an air supply pressurizing fan, a gas filter, a silencer and a cooler which meet the standard and process requirements.
Preferably, the dehumidifier, the air extractor and the nitrogen generator are controlled in a variable frequency mode, and power is adjusted according to the monitored humidity and the actual use requirement, so that the efficiency is improved, and meanwhile, energy is saved and emission is reduced.
Preferably, the air supply pressurizing fan performs pressurized air supply on the basis of calculating the pressure loss of the system, and dry air can cover all parts in the whole inhaul cable.
Preferably, the gas filter adopts high-medium-efficiency, sub-high-efficiency and high-efficiency class B three-stage filtration, the efficiency is not lower than 99.99% and the resistance of the filter is not higher than 220Pa under the rated air quantity and 20% rated air quantity.
Preferably, the silencer should determine the required silencing quantity according to the fan noise and the spectral characteristic noise allowance standard, i.e. the silencing performance of the selected silencer is adapted to the required silencing quantity.
Preferably, the cooler is arranged in a section of the pipe with stable gas flow, and the cooler can reduce the temperature of the high-temperature gas at the outlet to 60 ℃ or below through heat exchange.
Specifically, the cable-stayed bridge inhaul cable dehumidification system utilizing the ventilating steel pipe structure further comprises a sensor and an actuator system, and the sensor and the actuator system are composed of a flow sensor, a temperature and humidity sensor, a pressure sensor, a rainfall sensor and a motion control execution element which meet the standard and the measurement accuracy requirements, and are distributed on a bridge body and the inhaul cable.
Preferably, the sensor and actuator system, wherein the sensor part should be divided into two sensor groups, the position that every group sensor is constituteed and is installed is different, one group should integrate flow sensor, temperature and humidity sensor, pressure sensor and install the inside, air inlet and the gas outlet control cable dehumidification state at the cable. And the other group of the bridge monitoring system is integrated with a flow sensor, a temperature and humidity sensor and a rainfall sensor to monitor the on-site environment state of the bridge.
Preferably, the sensor and actuator system, wherein the actuator part is a motion actuator, is responsible for interlocking, linkage, automatic protection and automatic control of the equipment, and comprises electric valves, electromagnetic valves, contactors, relays, programmable logic controllers and other equipment.
The system comprises a monitoring and control system, and comprises parameter monitoring, parameter and equipment state display, automatic adjustment and control, background budget and self-defined early warning pushing, and a multi-terminal cloud monitoring platform capable of being remotely accessed.
Preferably, the monitoring and control system and the monitoring equipment can continuously record and display the running data and the equipment state of each system, and the data are stored in the local area and the cloud for more than two years.
Preferably, the monitoring and control system, the automatic adjustment and control part can change the set values of the controllers, and automatically start and stop the system equipment according to the requirements of the energy-saving control program.
Preferably, the monitoring and control system has the self-defined early warning function of providing self-defined numerical early warning, cable body state early warning and equipment state early warning, real-time display and instant push are carried out, and a basis is provided for equipment starting, energy consumption control and maintenance.
Preferably, the monitoring and control system and the multi-terminal software development and cloud monitoring platform part provide client downloading and installation of a multi-operating system, and the monitoring and control system comprises a PC (personal computer) end and a mobile phone end and provides data storage and data sending functions.
Specifically, the basic process flow of the dehumidified gas generation system is as follows: gas filtration → air dehumidification/nitrogen generation → dry gas pressurization → cooling → gas supply → intra-cable dehumidification → exhaust.
Preferably, the air exhaust monitoring system is provided with a T-shaped control device, the two pipelines can be controlled by a solenoid valve generally, the solenoid valve closes the air inlet pipeline and opens the air exhaust pipeline during air exhaust monitoring, and then the air in the cable body is exhausted and monitored by an air exhauster.
Further, the air in the cable body is extracted by the air extractor in a sampling test link before dehumidification, and timing sampling or environment value sampling is adopted, namely the air extractor samples at intervals or samples when the temperature, humidity, rainfall and the like in the environment reach set values.
Furthermore, a sensor group is arranged on an air exhaust pipeline of the air exhauster, parameters are monitored and uploaded to the cloud end, and the power, the operation time and the like of the dehumidification system are calculated through a cloud end big data model.
Furthermore, the dehumidifying gas supply pipeline at the front end of the inhaul cable is also provided with a sensor group for monitoring various parameters of the dehumidifying gas and ensuring that the supplied gas meets the requirements.
Further, the air outlet pipeline at the tail end of the inhaul cable is also provided with a sensor group for monitoring various parameters of the exhaust gas to judge whether the inhaul cable is dehumidified thoroughly.
Specifically, in the environment of the bridge, an environment monitoring sensor group is arranged to monitor parameters such as environment temperature, humidity and rainfall.
Specifically, on the basis of the above equipment scheme, the concrete dehumidification monitoring and control process of the cable-stayed bridge cable dehumidification system using the ventilating steel tube structure is as follows.
First, real-time monitoring
Sampling test before dehumidification adopts timing sampling or environment value sampling, namely sampling by an air extractor at intervals or sampling when the temperature, humidity, rainfall and the like in the environment reach set values.
Second, data calculation
And calculating the power required by each system through a preset mathematical model and a big data artificial intelligence system corresponding to the actual dehumidification requirement, and automatically formulating an energy-saving dehumidification scheme.
Third step, gas Preset
According to the established dehumidification scheme, air dehumidification or nitrogen presetting is carried out, and the dehumidification process comprises the following steps: gas filtration → air dehumidification/nitrogen generation → dry gas pressurization → cooling → gas supply → intra-cable dehumidification → exhaust.
The fourth step, dehumidification monitoring
Monitoring of a cable dehumidification system is carried out while cable dehumidification is carried out, and monitoring data are uploaded in real time.
Fifth, cloud analysis
The cloud big data and the artificial intelligence system collect dehumidification information, provide reliable data for subsequent dehumidification monitoring, and simultaneously also carry out the control of sensitive parameter, for example equipment load, trouble, extreme weather control, cable internal blocking, outer inoxidizing coating damage lead to dehumidification gas decompression etc. real-time warning carry out the propelling movement.
Sixthly, remotely checking
The data of the system can be stored at the cloud end, and meanwhile can be checked through the webpage, the PC end and the mobile phone end, monitoring is carried out in real time for 24 hours, early warning and alarm data of cloud end pushing are synchronized with each client end, and relevant personnel can be guaranteed to find and solve problems at the first time.
Compared with the existing cable-stayed bridge cable dehumidification system, the cable-stayed bridge dehumidification system has the following advantages.
1. Ventilation steel pipe innovative inhaul cable structure for improving dehumidification efficiency
In an application scene of cable-stayed bridge cable dehumidification, a traditional dehumidification structure and a dehumidification system have great technical defects, fundamentally, dry gas is not uniformly distributed in a cable feeding process, namely the traditional dehumidification dry gas only stays on the surface of a cable body, cannot enter gaps among cable strands and cannot enter gaps among cable wires in the cable strands, and the defects directly cause that anticorrosion measures of the dehumidification system in the application process are invalid.
The invention provides a dehumidification structure of an internal-external cable-stayed bridge cable, which ensures the strength of the cable, ensures that dry gas can be filled between cables inside the cable through a gas inlet, has higher efficiency than the traditional mode, does not influence the strength of the cable during corrosion prevention, and can reduce economic loss and potential safety hazard caused by cable corrosion.
2. The monitoring and control system gives early warning in time, so that the equipment is automatically started and stopped, and the system is energy-saving and environment-friendly
The automatic regulation and control part of the monitoring and control system can change the set value of each controller and automatically start and stop the system equipment according to the requirement of the energy-saving control program. The self-defined early warning function of the system provides self-defined numerical early warning, main cable state early warning and equipment state early warning, real-time display and instant push are realized, and a basis is provided for equipment starting, energy consumption control and maintenance.
3. Multi-platform access, accurate push
The data of the system can be stored at the cloud end, and meanwhile can be checked through the webpage, the PC end and the mobile phone end, monitoring is carried out in real time for 24 hours, early warning and alarm data of cloud end pushing are synchronized with each client end, and relevant personnel can be guaranteed to find and solve problems at the first time.
Drawings
FIG. 1 is a schematic view of the dehumidification system as a whole.
Fig. 2 is an overall schematic view of a cable bridge dehumidification system of a cable-stayed bridge.
FIG. 3 is a schematic view of the gas flow in the cable.
Fig. 4 shows a T-shaped air supply and monitoring structure at the front end of the cable.
FIG. 5 is a cable end vent monitoring structure.
FIG. 6 is a cable exhaust collet exhaust monitoring structure.
Detailed Description
Aiming at the structural defects of the traditional cable-stayed bridge cable in the prior art, the invention provides a cable-stayed bridge cable dehumidification system with a ventilating steel pipe structure, and the main implementation principle, the specific implementation mode and the corresponding beneficial effects of the implementation technical scheme of the invention are elaborated in detail by combining various figures.
Example 1.
The invention relates to a cable-stayed bridge inhaul cable dehumidification system.
1.1 stay cable dehumidification system
Firstly, a cable-stayed bridge cable dehumidification system feeds dehumidification gas through one end of a cable, namely the front end of the cable, the front end uses a T-shaped gas feeding and monitoring structure, a gas outlet cable clamp is arranged in the middle of the cable, and exhaust monitoring sensor groups are arranged on the cable and the tail end of the cable;
secondly, the dehumidifying gas is directly pressed from the front end of the stay cable to the tail end of the stay cable, an air inlet cable clamp is not arranged in the middle, the material and monitoring cost is reduced, and the cable-stayed bridge stay cable dehumidifying system is integrally shown in figure 2.
1.2 ventilating steel pipe structure
The cable-stayed bridge cable in the embodiment adopts a ventilating steel pipe structure, and the concrete structure of the cable-stayed bridge cable conforms to a cable-stayed bridge cable structure which is dehumidified by the ventilating steel pipe: 202010392707.7, the stay cable dehumidification is carried out from inside to outside, so that the dehumidifying gas can be filled in the stay cable really to achieve the better dehumidifying purpose, and the dehumidifying gas enters the stay cable through the ventilation steel pipe, as shown in the schematic diagram in fig. 3.
1.3 sensor monitoring
The sensor part should be divided into two sensor groups, and the position that every group sensor is constituteed and is installed is different, and a set of flow sensor, temperature and humidity sensor, pressure sensor that should integrate are installed at the air inlet gas outlet monitoring cable dehumidification state of cable. And the other group of the sensors is integrated with a flow sensor, a temperature and humidity sensor and a rainfall sensor to monitor the environment state of the site of the bridge, and the sensor group for monitoring the environment is usually arranged at a proper position of a bridge head or a main tower.
1.4 stay cable front end T type structure
The air inlet of cable-stay bridge cable front end should have T type structure, under the control of T type solenoid valve, be equipped with the extraction opening of the import of a dry gas and an air extractor respectively, and two pipelines are equipped with sensor group respectively, and when dry gas got into, the extraction opening self-closing of air extractor, when the air extractor was moved, dry gas air inlet closed, the air extractor extraction air was the sample monitoring, when the internal air of cable of sample reached the setting value, began to carry out data operation and dehumidification, T type structure refers to fig. 4.
1.5 inhaul cable exhaust lock clamp and tail end structure
The exhaust locking clamp of the cable-stayed bridge cable and the tail end gas outlet are provided with an exhaust monitoring sensor for monitoring the final dehumidification effect of the cable-stayed bridge cable, and the structure of the exhaust locking clamp is shown in fig. 5 and 6.
1.6 monitoring System
The monitoring and control system of the embodiment comprises a parameter monitoring and parameter and equipment state display part, namely, the monitoring equipment can continuously record and display the running parameters and the equipment state of each system at the same time interval and the same measurement precision as a field measurement instrument, a storage medium and a database of the monitoring equipment can locally store and record the running parameters which are continuous for more than two years, and an automatic adjustment and control part of the monitoring and control system can change the set values of each controller and automatically start and stop the system equipment according to the requirements of an energy-saving control program.
1.7 remote Access, early Warning
The data of the system can be stored at the cloud end and can be checked through the webpage, the PC end and the mobile phone end, 24-hour real-time monitoring is achieved, early warning and alarm data pushed by the cloud end are synchronized with each client end, and it is guaranteed that relevant personnel find and solve problems at the first time.
Claims (9)
1. A stay cable dehumidification system using a steel tube for ventilation, comprising: the device comprises a guy cable (1) with a ventilating steel pipe structure, a dehumidifying gas generating system (2), a sensor and actuator system (3), a monitoring and controlling system (4) and an air exhaust monitoring system (5).
2. A guy cable (1) with air-through steel pipe structure according to claim 1, which is constructed in a guy cable bridge guy cable structure for dehumidifying by using air-through steel pipes: 202010392707.7 (2020-05-11) is made by standard method.
3. The dehumidified gas generation system (2) as claimed in claim 1, which is composed of a dehumidifier or nitrogen generator, an air extractor, a pressure fan, a filter, a muffler, and a cooler meeting the standard and process requirements.
4. The sensor and actuator system (3) according to claim 1, which is composed of a flow sensor, a temperature and humidity sensor, a pressure sensor, a rainfall sensor and a control actuator, which meet the requirements of standards and measurement accuracy, and are distributed on the bridge body and the guy cable.
5. The monitoring and control system (4) according to claim 1, comprising a multi-terminal cloud monitoring platform with parameter monitoring, parameter and equipment status display, automatic adjustment and control, background budget and custom early warning push, and remote access.
6. The system (2) for generating dehumidified gas with steel ventilation tube according to claim 3, wherein the process flow is air filtration → air dehumidification/nitrogen generation → pressurization → cooling → air supply → dehumidification inside cable → exhaust.
7. The sensor and actuator system (3) of claim 4, wherein the sensor part is divided into two sensor groups, one group of integrated flow sensors, temperature and humidity sensors and pressure sensors are arranged at the air inlet and the air outlet of the inhaul cable to monitor the dehumidifying state of the inhaul cable; and the other group of the sensors integrates a flow sensor, a temperature and humidity sensor and a rainfall sensor to monitor the on-site environment state of the bridge.
8. A sensor and actuator system (3) according to claim 4, wherein the actuator part is a moving actuator, responsible for interlocking, automatic protection and automatic control of the equipment.
9. An air extraction monitoring system (5) according to claim 1, characterized in that the inlet of the dehumidified air has a T-shaped configuration, and that, under the control of the T-shaped solenoid valve, an extraction opening with an air extractor is provided, and the sensor group monitors various indexes of the extracted air.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010769925.8A CN111827114A (en) | 2020-08-04 | 2020-08-04 | Cable-stayed bridge inhaul cable dehumidification system utilizing ventilating steel pipe structure |
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| CN202010769925.8A CN111827114A (en) | 2020-08-04 | 2020-08-04 | Cable-stayed bridge inhaul cable dehumidification system utilizing ventilating steel pipe structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113481849A (en) * | 2021-07-19 | 2021-10-08 | 重庆万桥交通科技发展有限公司 | Cable system |
| CN113818346A (en) * | 2021-09-13 | 2021-12-21 | 上海浦江缆索股份有限公司 | Stay cable auxiliary mechanism based on dehumidification system and dehumidification method |
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| JPH01230802A (en) * | 1988-03-11 | 1989-09-14 | Kajima Corp | Corrosion preventing method in errection of diagonal member of diagonal tension bridge |
| CN101831658A (en) * | 2010-05-14 | 2010-09-15 | 中国人民解放军理工大学工程兵工程学院 | Drying and corrosion prevention method and system of main cable of suspension bridge |
| CN103255715A (en) * | 2013-04-24 | 2013-08-21 | 河海大学 | Stay cable dehumidification and anticorrosion system |
| CN110565524A (en) * | 2019-09-30 | 2019-12-13 | 西南交通大学 | Assessment method of air supply and dehumidification system in main cable of suspension bridge |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01230802A (en) * | 1988-03-11 | 1989-09-14 | Kajima Corp | Corrosion preventing method in errection of diagonal member of diagonal tension bridge |
| CN101831658A (en) * | 2010-05-14 | 2010-09-15 | 中国人民解放军理工大学工程兵工程学院 | Drying and corrosion prevention method and system of main cable of suspension bridge |
| CN103255715A (en) * | 2013-04-24 | 2013-08-21 | 河海大学 | Stay cable dehumidification and anticorrosion system |
| CN110565524A (en) * | 2019-09-30 | 2019-12-13 | 西南交通大学 | Assessment method of air supply and dehumidification system in main cable of suspension bridge |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113481849A (en) * | 2021-07-19 | 2021-10-08 | 重庆万桥交通科技发展有限公司 | Cable system |
| CN113818346A (en) * | 2021-09-13 | 2021-12-21 | 上海浦江缆索股份有限公司 | Stay cable auxiliary mechanism based on dehumidification system and dehumidification method |
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