WO2018188629A1

WO2018188629A1 - Dehumidification system of stay cable and dehumidification method of stay cable

Info

Publication number: WO2018188629A1
Application number: PCT/CN2018/082821
Authority: WO
Inventors: 姚超
Original assignee: 深圳市科兰德实业发展有限公司
Priority date: 2017-04-13
Filing date: 2018-04-12
Publication date: 2018-10-18
Also published as: CN107059621A

Abstract

Disclosed are a dehumidification system of a stay cable and a dehumidification method of a stay cable. The dehumidification system of a stay cable comprises a dehumidification module (2), and a stay cable ventilation module (3)used for transmitting new air after processing by the dehumidification module (2), wherein the dehumidification module (2) comprises: a filtering device (21) used for filtering the newly input air; a dehumidification device (22) used for dehumidifying the new air filtered by the filtering device (21); a drying balance device (23) used for balancing air pressure of new air dehumidified by the dehumidification device (22); an air transmission device (24) used for successively transmitting the new air to the filtering device (21), the dehumidification device (22) and the drying balance device (23). The dehumidification system of a stay cable and the dehumidification method of a stay cable achieve the aims of dehumidification and corrosion prevention by means of sending dry air to the stay cable, and can timely detect the system, solving the problem of rusting of upper and lower anchors and the stay cables, significantly decreasing the frequency of stay cable replacement and effectively increasing the safety of a bridge.

Description

Cable stay dehumidification system and stay cable dehumidification method

Technical field

The invention relates to the field of stay cable dehumidification, in particular to a stay cable dehumidification system and a cable stay dehumidification method.

Background technique

Due to corrosion problems, especially in areas with high humidity, the existing stay cables tend to corrode the upper and lower anchors of the stay cables. It is necessary to perform regular oiling and changing of cables. Such maintenance and maintenance, resulting in high maintenance costs and long maintenance time, some of the cost of the cable-stayed bridge is higher than the cost of repair, and the life of the cable-stayed bridge is short, there is a safety hazard.

Summary of the invention

In order to overcome the deficiencies of the prior art, it is an object of the present invention to provide a stay cable dehumidification system which can solve the problem of cable stay corrosion and high maintenance cost.

The object of the invention is achieved by the following technical solutions:

A stay cable dehumidification system for dehumidifying a stay cable, comprising a dehumidification module, and connecting with the dehumidification module for conveying fresh air processed through the dehumidification module to the stay cable The cable staying ventilation module; wherein the dehumidification module comprises:

a filtering device for filtering the input fresh air;

a dehumidifying device for dehumidifying fresh air filtered through the filtering device, the dehumidifying device being connected to the filtering device;

a dry air balance device for performing air pressure balance on fresh air dehumidified by the dehumidification device, the dry air balance device being connected to the dehumidification device;

a gas conveying device for sequentially conveying fresh air to the filtering device, the dehumidifying device, and the dry air balancing device, the gas conveying device and the filtering device, the dehumidifying device, and the dry wind Balance device connection.

Preferably, the dry wind balancing device comprises a mixing bellower between the filtering device and the dehumidifying device and an air volume automatic balancing section located at a rear end of the dehumidifying device, and the air volume automatic balancing section is connected with the air mixing box .

Preferably, a cooler is arranged between the air volume automatic balance section and the air mixing box.

Preferably, the dehumidification device comprises:

a dehumidification runner for dehumidifying the filtered fresh air, the dehumidification runner comprising an air inlet end and an air outlet end;

a processing fan, configured to send the filtered fresh air to the dehumidification runner, the processing fan being connected to the air inlet end of the dehumidification runner;

a regenerative heater for heating the filtered fresh air, the regenerative heater being located between the filtering device and the dehumidification rotor, and respectively connected to the filtering device and the dehumidification rotor;

The regeneration fan is configured to send the heated fresh air to the dehumidification runner, and the regeneration fan is connected to the outlet end of the dehumidification runner.

Preferably, the rear end of the dehumidification module is provided with a pressure sensor.

Preferably, the stay cable comprises an anchor pad, a stay cable body composed of a plurality of wires, an anchor provided at both ends of the stay cable body and engaged with the anchor pad to fasten the same. The device has a protective cover mounted on an outer end of the anchoring device at each end of the cable body; the cable staying ventilation module includes a ventilation device disposed at one end of the protective cover, and respectively disposed An air guiding tube is disposed at both ends of the stay cable body to allow dry air to enter the inside of the stay cable body, and one end of the air guiding tube communicates with the protective cover.

Preferably, the ventilation device comprises a high pressure tube disposed on the protective cover, and a high pressure tube combined joint disposed between the protective cover and the high pressure tube, the high pressure tube being fixed by the high pressure tube combination joint The protective cover is on.

Preferably, the air outlet end of the stay cable ventilation module is provided with a temperature and humidity sensor.

The invention also relates to a cable staying dehumidification method comprising:

Filter the incoming fresh air;

Dehumidification of filtered fresh air;

Pressure balance of dehumidified fresh air;

Fresh air that has been pressure balanced is delivered to the stay cable.

Preferably, the air pressure balance of the dehumidified fresh air comprises: conveying a part of the fresh air dehumidified to the stay cable, and mixing another part of the fresh air with the filtered fresh air to perform dehumidification.

Compared with the prior art, the beneficial effects of the invention are: the purpose of dehumidifying and anti-corrosion by sending the drying wind to the cable through the dehumidification system, reasonably designing the air supply amount of the dehumidifier and timely detecting the system, and solving the upper and lower anchor heads and the diagonal pulling The problem of corrosion of the cable greatly reduces the frequency of cable replacement, reduces the maintenance cost, effectively improves the safety of the bridge, and avoids measures such as oil filling, cable replacement, etc. Adverse consequences.

DRAWINGS

1 is a schematic view of a stay cable dehumidification system according to an embodiment of the present invention;

Figure 2 is a schematic view of the dehumidification device of the cable stay dehumidification system shown in Figure 1;

3 is a schematic view of a stay cable ventilation module in the cable stay dehumidification system shown in FIG. 1;

Figure 4 is an enlarged view of the portion A shown in Figure 3;

Figure 5 is an enlarged view of the portion B shown in Figure 3;

Figure 6 is a schematic view showing the distribution of the dehumidification system shown in Figure 1 in a cable stayed bridge;

Figure 7 is a plan view showing the planar distribution of the dehumidification system shown in Figure 6;

FIG. 8 is a flowchart of a method for dehumidifying a stay cable according to an embodiment of the present invention.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

1, the embodiment of the present invention is provided in the stay cable dehumidification system for dehumidification of

oblique

cable

1, 2 comprises a dehumidifier module, the dehumidifier module and the second connection for the second processing module via the dehumidifying after the fresh air delivered to the stay cables of cable 31 of vent module; wherein the dehumidifying means comprises a filter module 2 is connected through a pipe 21, dehumidifier 22, dry air balancing means 23 and a gas delivery device 24, wherein the conduit An air volume adjustment valve 25 is provided thereon. The filtering device 21 is for filtering the incoming fresh air. The dehumidifying device 22 is for dehumidifying the fresh air filtered by the filtering device 21 , and the dehumidifying device 22 is connected to the filtering device 21. Dry air balancing means 23 for dehumidified fresh air dehumidification device 22 for pressure balance, the balance dry air means 23 is connected to the dehumidifier 22; dry air balancing means 23 comprises a filter 22 is located between the mixing device 21 and the dehumidification device The air box 231 and the air volume automatic balance section 232 located at the rear end of the dehumidifying apparatus 22, and the air volume automatic balance section 232 are connected to the air mixing box 231; wherein the air volume automatic balance section 232 and the air mixing box 231 are provided with a cooler 233. The gas delivery device 24 is configured to sequentially deliver fresh air to the filtration device 21, the dehumidification device 22, and the dry air balance device 23, and the gas delivery device 24 is connected to the filtration device 21, the dehumidification device 22, and the dry air balance device 23, respectively; The conveying device 24 is a high pressure fan, and the high pressure fan is located at the rear end of the air volume automatic balancing section 232 for providing power for the fresh air entering the air volume automatic balancing section 232.

The high-pressure fan is started to provide power for the fresh air to flow in a specific direction in the pipeline, and the air volume adjusting valve 25 is opened, and the fresh air enters the filtering device 21 through the air inlet pipe, is filtered by the filtering device 21, enters the air mixing box 231, and then enters the dehumidifying device 22, and the fresh air passes through After the dehumidification device 22 is dehumidified, it becomes a dry wind, and the dry air enters the air volume automatic balance section 232 under the action of the high pressure fan. According to the required air volume of the stay cable 1, a part of the dry air is sent to the stay cable ventilation module 3 through the pipeline. The other part of the rich dry air is cooled by the cooler 233, and then enters the mixing tank 231 and mixed with the fresh air filtered by the filtering device 21, and then sent to the dehumidifying device 22. Another part of the rich dry air is cooled and sent to the mixing box to balance the pressure in the pipe. On the other hand, the dry air temperature passing through the air volume automatic balancing section 232 is generally between 60 degrees and 70 degrees, and passes through the cooler 233. After cooling, the temperature is controlled to be below 40 degrees after mixing with the fresh air passing through the filtering device 21, which can effectively reduce the temperature of the air in the air mixing box, increase the relative humidity, and make the water more likely to be precipitated, thereby making the dehumidifying effect better and achieving energy saving. purpose.

As shown in FIG. 2, the dehumidifying device 22 includes a dehumidifying rotor 221, a processing fan 222, a regenerative heater 223, and a regenerative fan 224. The dehumidification wheel 221 is used for dehumidifying the filtered fresh air. The dehumidification wheel 221 includes an air inlet end 2211 and an air outlet end 2212. The processing fan 222 is configured to send the filtered fresh air to the dehumidification wheel 221. The processing fan 222 is connected to the air inlet end 2211 of the dehumidification wheel 221; the regeneration heater 223 is used for heating the filtered fresh air, and the regeneration heater 223 is located between the filter device 21 and the dehumidification wheel 221, and is respectively connected to the filter device. 21. The dehumidification runner 221 is connected; the regeneration fan 224 is configured to send the heated fresh air to the dehumidification runner 221, and the regeneration fan 224 is connected to the outlet end 2212 of the dehumidification runner 221. A part of the fresh air filtered by the filtering device 21 passes through the mixing bellows 231 and enters the dehumidifying rotor 221 under the action of the processing fan 222. After the dehumidifying rotor 221 dehumidifies the fresh air, the water droplets are adsorbed on the surface of the dehumidifying runner 221; 21, another part of the filtered fresh air is heated by the regenerative heater 223 under the action of the regeneration fan 224, and then passes through the dehumidification rotor 221, thereby removing the water droplets adsorbed on the surface of the dehumidification wheel 221, thereby improving the dehumidification efficiency of the entire system.

Preferably, the back end of the dehumidification module 2 is provided with a pressure sensor 26 to monitor the pressure in the pipeline at any time, and feed back abnormal information to the control device of the entire dehumidification system for timely processing. When the display pressure is too small or atmospheric pressure, it indicates It has been reported that if the fan fails to operate, or if the pipe is broken, there is a leak, or the cable stays broken, it will remind people to carry out maintenance.

As shown in Figures 3 to 5, the upper and lower ends of the stay cable 1 are respectively an upper anchor head and a lower anchor head, and the upper anchor head and the lower anchor head are symmetrically designed. The stay cable 1 includes an anchor pad 11 and a plurality of metals. A cable body 12 composed of a wire, an anchoring device 13 disposed at both ends of the cable body 12 and engaged with the anchor plate 11 for fastening the cable body 12, and each of the two ends of the cable body 12 is provided with an installation a protective cover 14 at an outer end of the anchoring device 13; the cable staying ventilation module 3 includes a venting device 31 disposed at one end of the protective cover 14, and is disposed at each end of the cable body 12 to allow dry air to enter the cable body The inner air guiding tube 32 is 12, and one end of the air guiding tube 32 communicates with the protective cover 14. The ventilating device 31 includes a high pressure pipe 311 provided on the protective cover 14, and a high pressure pipe combination joint 312 provided between the protective cover 14 and the high pressure pipe, and the high pressure pipe 311 is fixed to the protective cover 14 by a high pressure pipe combination joint 312. The wire at both ends of the stay cable 1 is fixed by epoxy iron sand. The length of the air guide tube 32 is the same as the length of the epoxy iron sand at both ends of the stay cable 1. The air guide tube 32 slantes the dry wind along the air inlet end. The cable body 12 is conveyed to a region where there is no epoxy iron sand, and the dry wind is transported along the stay cable body 12 to the protective cover 14 of the upper anchor head at the air outlet end, thereby performing dry anticorrosion protection inside the stay cable body 12. The dry air dehumidified by the dehumidification module 2 enters the protective cover 14 through the high pressure pipe 311 of the venting device 31, and a part of the dry air circulates inside the protective cover 14 to enter the anchor pad 11, the anchoring device 13 and the cable body 12 In the gap between the two, the external rainwater is prevented from infiltrating, causing corrosion of the lower anchor head, the fastening nut and the anchor pad 11; another part of the dry wind enters the air guiding pipe 32 of the lower anchor head, and enters the stay cable through the air guiding pipe 32. The gap in the middle of the body 12 is then discharged from the protective cover 14 of the upper anchor head through the air duct 32 of the upper anchor head. The dry wind flows along the gap between the wires in the gap in the middle of the stay body 12, and the wire of the stay body 12 is dried to prevent corrosion of the stay body 12. At the upper anchor head, a part of the discharged dry wind is directly discharged from the venting device 31 at the end of the protective cover 14 of the upper anchor head, and another part of the discharged dry air circulates in the upper anchor head protection cover 14 to enter the anchor pad 11 The gap between the anchoring device 13 and the stay cable body 12 is discharged from the gap between the anchor pad 11 and the anchoring device 13 and the stay cable body 12 to prevent the external rainwater from penetrating and causing the upper anchor head to be tight. Corrosion of the solid nut and the anchor pad 11.

Preferably, the outlet end of the stay cable ventilation module 3 is provided with a silicone constant pressure valve 33 to ensure a constant air pressure of the entire system. The air outlet of the stay cable ventilation module 3 is provided with a temperature and humidity sensor 34 to monitor the temperature and humidity of the air outlet at any time. When the temperature and humidity values are stable, the system works normally; when the dehumidifier works for a long time, the temperature and humidity range does not reach When the control requirements are met, the management office is reminded of the need for human intervention.

As shown in FIG. 6 and FIG. 7, the dehumidification system 100 is distributed in the stay cables of the bridge 200, and the dehumidification system 100 is disposed at both ends of the bridge 200, and the dry wind is delivered to each of the stay cables 1 through the pipeline, according to the oblique The number of cables 1 sets the number of pipes, dehumidifies and preserves the stay cables 1, and detects the dehumidification condition in each stay cable 1 to ensure the safety of the bridge.

The embodiment of the present invention further provides a stay cable dehumidification method, which is implemented based on the cable stay dehumidification system in the above embodiment, as shown in FIGS. 1 to 8, the method includes:

Step S101: Filtering the input fresh air.

Specifically, the gas delivery device 24 and the air volume adjustment valve 25 are opened to supply fresh air to the filtration device 21, and the filtration device 21 filters the fresh air.

Step S102: Dehumidifying the filtered fresh air.

Specifically, the dehumidification device 22 dehumidifies the filtered fresh air.

Step S103: performing air pressure balance on the dehumidified fresh air;

Specifically, a mixing bellows 231 is disposed at the front end of the dehumidifying device 22, and an air volume automatic balancing section 232 is disposed at the rear end of the dehumidifying device 22. The filtered fresh air enters the mixing box 231 and enters the dehumidifying device 22, and the dry air after dehumidification enters the air volume automatic balancing section 232. A part of the fresh air is sent to the stay cable 1. In order to prevent the overpressure and overcurrent, another part of the surplus dry air is shunted through the automatic balance section 232, and after cooling, enters the air mix box 231 and is mixed with the filtered fresh air. The dehumidifying device 22 is sequentially circulated.

Step S104: The fresh air that has been subjected to the air pressure balance is sent to the stay cable.

Specifically, after the dehumidified dry air passes through the air volume automatic balance section 232, the air venting device 31 is sent to the ventilating device 31 of the stay cable 1 and enters the protective cover 14 of the stay cable 1 through the venting device 31, and the two ends of the cable body 12 are An air guiding tube 32 is provided, and the dry air enters the gap of the stay cable body 12 through the air guiding tube 32, and dehumidifies the stay cable body 12 and the upper and lower anchor heads.

The cable stay dehumidification system and the cable stay dehumidification method provided by the invention pass the dehumidification system to send the dry wind to the cable to achieve the purpose of dehumidification and anticorrosion, reasonably design the air supply volume of the dehumidifier and timely detect the system, and solve the upper and lower anchor heads and The corrosion problem of the stay cable greatly reduces the frequency of stay cable replacement, reduces the maintenance cost, effectively improves the safety of the bridge, and avoids the need for long-term bridge closure, such as oil filling, cable replacement, etc. Adverse consequences of the measures.

Various other changes and modifications may be made by those skilled in the art in light of the above-described technical solutions and concepts, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims

A stay cable dehumidification system for dehumidifying a stay cable, comprising: a dehumidification module; and a connection with the dehumidification module for conveying fresh air processed through the dehumidification module to the The cable staying ventilating module of the stay cable; wherein the dehumidification module comprises:

a filtering device for filtering the input fresh air;

a dehumidifying device for dehumidifying fresh air filtered through the filtering device, the dehumidifying device being connected to the filtering device;

a dry air balance device for performing air pressure balance on fresh air dehumidified by the dehumidification device, the dry air balance device being connected to the dehumidification device;

a gas conveying device for sequentially conveying fresh air to the filtering device, the dehumidifying device, and the dry air balancing device, the gas conveying device and the filtering device, the dehumidifying device, and the dry wind Balance device connection.
A cable-stayed dehumidification system according to claim 1, wherein said dry air balance means comprises a mixing bellower between said filtering means and said dehumidifying means and an air volume automatic balance at a rear end of said dehumidifying means The air volume automatic balance section is connected to the air mix box.
The stay cable dehumidification system according to claim 2, wherein a cooler is provided between the air volume automatic balance section and the air mix box.
The cable-stayed dehumidification system according to claim 1, wherein said dehumidifying apparatus comprises:

a dehumidification runner for dehumidifying the filtered fresh air, the dehumidification runner comprising an air inlet end and an air outlet end;

a processing fan, configured to send the filtered fresh air to the dehumidification runner, the processing fan being connected to the air inlet end of the dehumidification runner;

a regenerative heater for heating the filtered fresh air, the regenerative heater being located between the filtering device and the dehumidification rotor, and respectively connected to the filtering device and the dehumidification rotor;

The regeneration fan is configured to send the heated fresh air to the dehumidification runner, and the regeneration fan is connected to the outlet end of the dehumidification runner.
The stay cable dehumidification system according to claim 1, wherein a pressure sensor is disposed at a rear end of the dehumidification module.
A stay cable dehumidification system according to claim 1, wherein said gas delivery means is a high pressure blower, said high pressure blower being located at a rear end of said air volume automatic balance section.
The stay cable dehumidification system according to claim 1, wherein the gas delivery device is provided with a flow rate adjustment valve on the pipe.
The stay cable dehumidification system according to claim 1, wherein the stay cable comprises an anchor pad, a cable body composed of a plurality of wires, and is disposed at both ends of the cable body and An anchoring device that cooperates with the anchor pad to fasten the same, and both ends of the cable body are respectively provided with a protective cover installed at an outer end of the anchoring device; the cable staying ventilation module includes a venting device disposed at one end of the protective cover, and an air guiding tube respectively disposed at two ends of the stay cable body to allow dry air to enter the inside of the stay cable body, one end of the air guiding tube and the protective cover Connected.
A stay cable dehumidification system according to claim 8, wherein said venting means comprises a high pressure pipe provided on said protective cover, and a high pressure pipe combination joint provided between said protective cover and said high pressure pipe The high pressure pipe is fixed to the protective cover through the high pressure pipe combination joint.
The stay cable dehumidification system according to claim 6, wherein the outlet end of the stay cable ventilation module is provided with a silicone constant pressure valve. The stay cable dehumidification system according to claim 1, wherein the air outlet end of the stay cable ventilation module is provided with a temperature and humidity sensor.
A stay cable dehumidification method, comprising:

Filter the incoming fresh air;

Dehumidification of filtered fresh air;

Pressure balance of dehumidified fresh air;

Fresh air that has been pressure balanced is delivered to the stay cable.
The cable-stayed dehumidification method according to claim 12, wherein the filtering the input fresh air comprises: opening the gas delivery device and the air volume adjusting valve to deliver the fresh air to the filtering device, and the filtering device filters the fresh air.
The cable-stayed dehumidification method according to claim 12, wherein the dehumidifying the filtered fresh air comprises: dehumidifying the filtered fresh air by the dehumidifying device.
The cable-stayed dehumidification method according to claim 14, wherein the dehumidifying the filtered fresh air comprises: the processing fan sends a filtered portion of the fresh air to the dehumidification runner.
The cable-stayed dehumidification method according to claim 15, wherein the dehumidifying the filtered fresh air further comprises: another part of the fresh air filtered by the filtering device is heated by the regenerative fan under the action of the regenerative fan. And then through the dehumidification wheel.
The cable-stayed dehumidification method according to claim 12, wherein the air pressure balance of the dehumidified fresh air comprises: conveying a part of the fresh air dehumidified to the stay cable, and another part of the fresh air and the filtered fresh air. Dehumidification is carried out after mixing.
The cable-stayed dehumidification method according to claim 17, wherein the air pressure balancing of the dehumidified fresh air comprises: passing another filtered fresh air into the air mixing box, and then entering the dehumidifying device, and drying after dehumidification The wind enters the air balance automatic balance section.
The stay cable dehumidification method according to claim 18, wherein the air pressure balance of the dehumidified fresh air comprises: another part of the rich dry air is cooled by the cooler and then enters the air mix box.
The cable-stayed dehumidification method according to claim 12, wherein the conveying of the fresh air that has been subjected to the air pressure balance to the stay cable comprises: after the dehumidified dry air passes through the air volume automatic balance section, and is transported to the stay cable. The ventilating device enters the protective cover of the stay cable through the venting device, and the air guiding tube is disposed at both ends of the cable body, and the dry air enters the gap of the cable body through the air guiding tube, and the diagonal cable body and the upper and lower anchor heads Dehumidification.