A dehumidification system for air intake on cable protection anchor

Abstract

A dehumidification system for air intake of an upper anchor for cable protection includes a cable body, an upper anchor protection mechanism, and a lower anchor protection mechanism. The upper anchor protection mechanism includes an upper cable guide tube, an upper anchor protection cover, an air intake seat, an air intake pipe, and a pressure sensor. The air intake pipe is connected to the cable body to press the protective gas into the cable body. The lower anchor protection mechanism includes a rain cover, a lower anchor protection cover, an air release seat, and a lower anchor temperature and humidity sensor. The lower anchor temperature and humidity sensor is used to detect the temperature and humidity in the lower anchor protection cover, and the protective gas is introduced through the air intake pipe according to the temperature and humidity values, and then the pressure in the cable body reaches a predetermined value under the monitoring of the pressure sensor. The dehumidification system for air intake of an upper anchor for cable protection can prevent the steel wire in the cable strand from being oxidized and rusted due to excessive relative humidity, thereby greatly improving the service life of the inclined cable and saving the maintenance and operation costs of the bridge.

Description

Technical Field

[0001] The invention relates to the technical field of bridge cable manufacturing, in particular to a dehumidification system for air intake of anchors on cable protection. Background Art

[0002] Cables are the main load-bearing components of some bridges or other buildings, and the life of the cables also determines the life of the entire bridge. At present, the design life of cable-stayed bridges is more than 100 years, and their working environment is across rivers and seas, so the temperature and humidity change greatly, and the corrosion of cable steel wires is also very serious. At present, the actual service life of cable-stayed bridges is only about 20 years, because its main protection is achieved by galvanizing steel wires, extruding double-layer high-density polyethylene on the outer layer, and filling grease in the cable body. However, in actual use, as the cable is used, the anti-corrosion grease and galvanized layer in the cable body will gradually lose and even lose the protection of the steel wire, making it difficult to truly achieve a service life of more than 50 years for the cable. That is to say, for cable-stayed bridges with a design life of more than 100 years, at least one cable replacement must be carried out. The cost of cable replacement will exceed the manufacturing cost of the cable itself by several times. In addition, the cable replacement construction will seriously hinder traffic operation and cause safety hazards. Summary of the invention

[0003] In view of this, the present invention provides a dehumidification system for air intake on cable protection anchors that can prevent steel wire corrosion, so as to solve the above problems.

[0004] A dehumidification system for protecting the air intake of an upper anchor of a cable, comprising a cable body, an upper anchor protection mechanism arranged on the cable body, and a lower anchor protection mechanism arranged on the cable body. The upper anchor protection mechanism comprises an upper cable conduit sleeved on the cable body, an upper anchor protection cover sealed on the upper cable conduit, an air intake seat arranged on the upper anchor protection cover, an air intake pipe arranged on the air intake seat, and a pressure sensor arranged on the air intake seat. The air intake pipe is connected to the cable body to press the protective gas into the cable body. The lower anchor protection mechanism comprises a rain cover sleeved on the cable body, a lower anchor protection cover sealed on the rain cover, a degassing seat arranged on the lower anchor protection cover, and a lower anchor temperature and humidity sensor arranged on the degassing seat. The lower anchor temperature and humidity sensor is used to detect the temperature and humidity in the lower anchor protection cover, and the protective gas is introduced through the air inlet pipe according to the temperature and humidity values, and then the pressure in the cable body is made to reach a predetermined value under the monitoring of the pressure sensor.

[0005] Furthermore, the cable body includes an upper anchor wire sealing structure arranged at one end, and a lower anchor wire sealing structure arranged at the other end.

[0006] Furthermore, the upper anchor protection mechanism also includes an upper anchor air duct, which is arranged in the upper anchor wire sealing structure and is connected to the upper anchor protection cover and passes through the upper anchor wire sealing structure.

[0007] Furthermore, the lower anchor protection mechanism also includes at least one lower anchor air duct, which is arranged in the lower anchor wire sealing structure and is connected to the lower anchor protection cover and passes through the lower anchor wire sealing structure.

[0008] Furthermore, the lower anchor protection mechanism includes two lower anchor air ducts arranged at intervals.

[0009] Furthermore, when in use, the upper anchor wire sealing structure is located above the lower anchor wire sealing structure in the vertical direction.

[0010] Furthermore, the upper anchor protection mechanism also includes an air intake quick connector assembly arranged between the upper anchor protection cover and the air intake seat, and the air intake quick connector assembly is used to quickly connect and disassemble the upper anchor protection cover and the air intake seat.

[0011] Furthermore, the air release seat is fixedly connected to the lower anchor protective cover.

[0012] Furthermore, the air release seat is connected to the lower anchor protective cover via a pipe.

[0013] Furthermore, the dehumidification system for air intake on the cable protection anchor also includes a control device, which opens the air intake pipe to inflate the cable body according to the value output by the lower anchor temperature and humidity sensor, and closes the air intake pipe to stop inflating the cable body when the value output by the pressure sensor reaches a certain value.

[0014] Compared with the prior art, the dehumidification system for cable protection upper anchor air intake provided by the present invention has the upper anchor protection mechanism and the lower anchor protection mechanism, and the lower anchor protection mechanism has the lower anchor temperature and humidity sensor. The lower anchor temperature and humidity sensor detects the humidity in the cable all the time, and when the humidity reaches the threshold, the air pump connected to the air intake pipe is controlled to fill it with protective gas, and the protective gas can drive the moisture to separate from the air release seat, thereby preventing the steel wire in the cable strand from being oxidized and corroded due to excessive relative humidity, thereby greatly improving the service life of the inclined cable and saving the maintenance and operation costs of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional structure diagram of a dehumidification system for air intake on an anchor for cable protection provided by the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the partial enlarged structure at A of the dehumidification system for the air intake of the anchor on the cable protection.

[0017] Figure 3 for Figure 1 Schematic diagram of the partial enlarged structure at B of the dehumidification system for the air intake of the anchor on the cable protection. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0019] like Figures 1 to 3 As shown, it is a schematic diagram of the structure of the dehumidification system for the air intake of the anchor on the cable protection provided by the present invention. The dehumidification system for the air intake of the anchor on the cable protection includes a cable body 10, an upper anchor protection mechanism 20 arranged on the cable body 10, a lower anchor protection mechanism 30 arranged on the cable body 10, and a control device 40 electrically connected to the upper and lower anchor protection mechanisms 20 and 30. It can be imagined that the dehumidification system for the air intake of the anchor on the cable protection also includes some other functional modules, such as assembly modules, installation assemblies, sealing components, etc., which are well known to those skilled in the art and will not be repeated here.

[0020] The cable body 10 itself should be the prior art, which is composed of a plurality of steel wires, and a double layer of high-density polyethylene is extruded on the outside, and then a tape is wrapped around the outside of the polyethylene layer. The cable body 10 includes a cable strand 11, an upper anchor wire sealing structure 12 arranged at one end of the cable strand 11, and a lower anchor wire sealing structure 13 arranged at the other end of the cable strand 11. The cable strand 11, and the upper and lower anchor wire sealing structures 12 and 13 are also the prior art, such as the technical solution disclosed in patent number CN201620782756.0, which will not be repeated here. It can be understood that when in use, the upper anchor wire sealing structure 12 is located above the lower anchor wire sealing structure 13 in the vertical direction.

[0021] The upper anchor protection mechanism 20 includes an upper cable guide tube 21 sleeved on the cable body 10, an upper anchor protection cover 22 sealed on the upper cable guide tube 21, an air intake seat 23 arranged on the upper anchor protection cover 22, an air intake pipe 24 arranged on the air intake seat 23, a pressure sensor 25 arranged on the air intake seat, an upper anchor air guide tube 26 arranged in the cable body 10, and an air intake quick plug-in assembly 27 arranged between the upper anchor protection cover 22 and the air intake seat 23. The upper cable guide tube 21 is a tubular structure, which is sleeved on the outer side of the upper anchor wire sealing structure 12 and fixed to the upper anchor wire sealing structure 12. The upper anchor protection cover 22 can be a cylindrical structure with one end closed, which is buckled on the upper anchor wire sealing structure 12, and its end is fixed to the upper cable guide tube 21. It can be imagined that a sealing ring is provided between the upper anchor protection cover 22 and the upper cable guide tube 21 to achieve the purpose of sealing. The air inlet seat 23 can be a square frame, which is connected to the upper anchor protective cover 22 through an air inlet quick plug-in assembly 27. The air inlet quick plug-in assembly 27 is connected to the upper anchor wire sealing structure 12, and the air inlet quick plug-in assembly 27 itself should be a prior art and will not be described here. The air inlet quick plug-in assembly 27 is used to quickly connect and disassemble the upper anchor protective cover 22 and the air inlet seat 23. The air inlet pipe 24 is arranged on the air inlet seat 23, which can be connected to an air pump (not shown in the figure). When the air pump is turned on, gas such as protective gas can be pumped into the cable body 10. A valve can be set at one end of the air inlet pipe 24 to control its opening. The pressure sensor 25 is arranged on the air inlet seat 23 to timely detect the gas pressure in the air inlet seat 23. The upper anchor air guide pipe 26 is arranged in the upper anchor wire sealing structure 12 and is connected to the upper anchor protective cover 22 and passes through the upper anchor wire sealing structure 12. The upper anchor air guide tube 26 is disposed in the upper anchor wire sealing structure 12 to pump the pumped gas into the cable strand 11 of the cable body 10 and into the lower anchor wire sealing structure 13. Due to the presence of the upper anchor air guide tube 26, the air inlet pipe 24 is connected to the cable body 10 to press the protective gas into the cable body 10.

[0022] The lower anchor protection mechanism 30 includes a rain cover 31 sleeved on the cable body 10, a lower anchor protection cover 32 sealed on the rain cover 31, a degassing seat 33 arranged on the lower anchor protection cover 32, a lower anchor temperature and humidity sensor 34 arranged on the degassing seat 33, and at least one lower anchor air guide tube 35 arranged in the lower anchor wire sealing structure 13. For the cable body 10, the rain cover 31 is a prior art, which is arranged on the outside of the lower anchor wire sealing structure 13 to keep out rain, and it can be a conical tube. The lower anchor protection cover 32 can also be a cylindrical structure, which is buckled on the lower anchor wire sealing structure 13, and the lower anchor protection cover 32 is tightly connected to the rain cover 31. At the same time, a sealing ring is also arranged between the lower anchor protection cover 32 and the rain cover 31 to prevent leakage of protective gas. The degassing seat 33 is in communication with the protective cover 32, which can be connected by a pipe and fixedly connected to the lower anchor protective cover 32. The degassing seat 33 is also provided with a degassing pipe for discharging the water vapor existing in the lower anchor wire sealing structure 13. The lower anchor temperature and humidity sensor 34 is arranged on the degassing seat 33 to detect the humidity and temperature at the lower end of the cable body 10. The lower anchor air guide pipe 35 is in communication with the lower anchor protective cover 32 and passes through the lower anchor wire sealing structure 13, and is used to pass the protective gas in the cable strand 11 into the degassing seat 33. Of course, it is conceivable that when the protective gas is filled, the degassing pipe should be closed. In this embodiment, there are two lower anchor air guide pipes 35 to facilitate the introduction of the protective gas into the lower anchor wire sealing structure 13 as soon as possible.

[0023] The control device 40 may include a PLC or a microprocessor, which is electrically connected to the anchor temperature and humidity sensor 34 and the pressure sensor 25, and opens or closes the air pump to pump in the protective gas according to the values ​​output by the anchor temperature and humidity sensor 34 and the pressure sensor 25. Specifically, the anchor temperature and humidity sensor 34 is used to detect the temperature and humidity in the anchor protection cover 32, and the control device 40 introduces the protective gas through the air inlet pipe 24 according to the temperature and humidity values, and then makes the pressure in the cable body 10 reach a predetermined value under the monitoring of the pressure sensor 25. The control device 40 opens the air inlet pipe 24 to inflate the cable body 10 according to the value output by the anchor temperature and humidity sensor 34, and closes the air inlet pipe 24 to stop inflating the cable body 10 when the value output by the pressure sensor 25 is reached.

[0024] Compared with the prior art, the dehumidification system for cable protection upper anchor air intake provided by the present invention has the upper anchor protection mechanism 20 and the lower anchor protection mechanism 30, and the lower anchor protection mechanism 30 has the lower anchor temperature and humidity sensor 34. The lower anchor temperature and humidity sensor 34 always detects the humidity in the cable, and when the humidity reaches the threshold, the air pump connected to the air intake pipe 24 is controlled to fill it with protective gas, and the protective gas can drive the moisture to leave the air release seat, thereby preventing the steel wire in the cable strand from being oxidized and corroded due to excessive relative humidity, thereby greatly improving the service life of the inclined cable and saving the maintenance and operation costs of the bridge.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A dehumidification system for air intake on a cable protection anchor, characterized in that: The dehumidification system for protecting the air intake of the upper anchor of the cable comprises a cable body, an upper anchor protection mechanism arranged on the cable body, and a lower anchor protection mechanism arranged on the cable body, the upper anchor protection mechanism comprises an upper cable guide tube sleeved on the cable body, an upper anchor protection cover sealed on the upper cable guide tube, an air intake seat arranged on the upper anchor protection cover, an air intake pipe arranged on the air intake seat, and a pressure sensor arranged on the air intake seat, the air intake pipe is connected with the cable body to press the protective gas into the cable body, the lower anchor protection mechanism comprises a rain cover sleeved on the cable body, a lower anchor protection cover sealed on the rain cover, a deflation seat arranged on the lower anchor protection cover, and a lower anchor temperature and humidity sensor arranged on the deflation seat, the lower anchor temperature and humidity sensor is used to detect the lower anchor The temperature and humidity in the protective cover are detected, and protective gas is introduced through the air inlet pipe according to the temperature and humidity values, and then the pressure in the cable body reaches a predetermined value under the monitoring of the pressure sensor. The lower anchor protection mechanism also includes at least one lower anchor air duct, which is arranged in the lower anchor wire sealing structure and is communicated with the lower anchor protective cover and passes through the lower anchor wire sealing structure. The lower anchor protection mechanism includes two lower anchor air ducts arranged at intervals. The lower anchor temperature and humidity sensor detects the humidity and temperature of the lower end of the cable body. The lower anchor air duct is used to pass the protective gas in the cable strand into the degassing seat. The cable body includes an upper anchor wire sealing structure arranged at one end, and a lower anchor wire sealing structure arranged at the other end. The upper anchor protection mechanism also includes an upper anchor air duct, which is arranged in the upper anchor wire sealing structure and is communicated with the upper anchor protective cover and passes through the upper anchor wire sealing structure.

2. The dehumidification system for air intake of the cable protection anchor as claimed in claim 1, characterized in that: When in use, the upper anchor wire sealing structure is located above the lower anchor wire sealing structure in the vertical direction.

3. The dehumidification system for air intake of the anchor on the cable protection as claimed in claim 1, characterized in that: The upper anchor protection mechanism also includes an air intake quick connector assembly arranged between the upper anchor protection cover and the air intake seat, and the air intake quick connector assembly is used to quickly connect and disassemble the upper anchor protection cover and the air intake seat.

4. The dehumidification system for air intake of the cable protection anchor as claimed in claim 1, characterized in that: The air release seat is fixedly connected to the lower anchor protection cover.

5. The dehumidification system for air intake of the anchor on the cable protection as claimed in claim 4, characterized in that: The air release seat is connected to the lower anchor protection cover through a pipeline.

6. The dehumidification system for air intake of anchor on cable protection as claimed in claim 1, characterized in that: The dehumidification system for air intake of the cable protection upper anchor also includes a control device, which opens the air intake pipe to inflate the cable body according to the value output by the lower anchor temperature and humidity sensor, and closes the air intake pipe to stop inflating the cable body when the value output by the pressure sensor is reached.

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