Steel box girder dehumidification device

Abstract

The utility model discloses a steel box girder dehumidification device which comprises dehumidifiers arranged on the inner bottom faces of the two ends of a steel box girder body, steel box girder air inlets are formed in the inner bottom faces of the two ends of the steel box girder body, one end of each dehumidifier air inlet is connected with the corresponding steel box girder air inlet through a regeneration air pipe, and one end of each dehumidifier air outlet is connected with an activated carbon adsorption area. The other side of the activated carbon adsorption area is connected with a steel box beam booster fan, one end of an outlet of the steel box beam booster fan is connected with a first air supply pipe, and the other end of the first air supply pipe is located at the midspan position in the steel box beam body. The dehumidification device has the advantages that the dehumidification device is simple in structure and convenient to use, excessive consumption of materials is avoided, cost is reduced, air inside the steel box girder and air outside the steel box girder are circulated, the air outside the steel box girder is treated through the dehumidifier and the activated carbon adsorption area, and the dehumidification effect of the steel box girder is improved. Dehumidification in the steel box girder main body and dehumidification of the flange U ribs are achieved, and therefore the corrosion speed of the steel box girder is effectively slowed down.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder dehumidification, in particular to a steel box girder dehumidification device. Background Art

[0002] The corrosion of metal is related to the formation of water film, and the formation of water film changes with relative humidity. When the relative humidity is low, the corrosion is very slow. When the relative humidity gradually increases and reaches a certain limit, the corrosion rate will suddenly increase. The value of this relative humidity is called the critical relative humidity. The critical relative humidity of steel is about 70%, but when there is pollution in the air or the metal surface is unclean, this value will decrease, that is, at a lower relative humidity, the metal will corrode quickly. When the relative humidity is lower than the critical humidity, the metal is almost not corroded; when the relative humidity is above the critical humidity and the metal corrodes, the corrosion rate increases by about 2 times for every 10°C increase in temperature, and if the atmosphere contains salt spray, sulfur dioxide, hydrogen sulfide and dust, the corrosion will be accelerated. Therefore, the difference in the size of corrosion in different environments is obvious, higher in cities than in rural areas, higher in industrial areas than in living areas, higher in coastal areas than inland areas, and higher in high dust areas than in low dust areas, so it is particularly important to dry and dehumidify the interior of the steel box girder.

[0003] At present, the existing box girder dehumidification device mainly has the following problems:

[0004] 1. The air inside the box is isolated from the outside air, and the dry air circulating inside is seriously polluted, which causes great damage to the health of the construction workers inside the steel box girder;

[0005] 2. It is necessary to install seamless steel pipes to deliver dry air to various parts of the box, which is troublesome to install and not beautiful. It also increases material consumption and costs. The vibration generated during the movement of the vehicle can easily cause the pipes to loosen, affecting the drying effect of the dehumidification device.

[0006] 3. The impact of salt spray, sulfur dioxide and other substances on the corrosion of steel box girders was not considered.

[0007] 4. Only dehumidification is considered for the main body of the steel box girder, and the flange U ribs are not treated. However, the presence of humid air in the flange U ribs also has an impact on the corrosion of the steel box girder. Utility Model Content

[0008] In order to overcome the above problems existing in the existing box girder dehumidification device, the utility model provides a steel box girder dehumidification device. The technical solution is as follows:

[0009] A steel box girder dehumidification device comprises a dehumidifier arranged on the inner bottom surfaces at both ends of a steel box girder body, steel box girder air inlets are opened on the inner bottom surfaces at both ends of the steel box girder body, one end of the dehumidifier air inlet is connected to the steel box girder air inlet through a regeneration air duct, one end of the dehumidifier air outlet is connected to an activated carbon adsorption area, the other side of the activated carbon adsorption area is connected to a steel box girder pressurized fan, one end of the steel box girder pressurized fan outlet is connected to an air supply pipe 1, and the other end of the air supply pipe 1 is located at a mid-span position in the steel box girder body; flange U-rib pressurized fans are arranged on the inner bottom surfaces at both ends of the steel box girder body, the outlet end of the flange U-rib pressurized fan is connected to an air supply auxiliary pipe through an air supply pipe 2, and a flange U-rib air supply outlet is opened on the flange U-rib, and both ends of the air supply auxiliary pipe are respectively connected to the flange U-ribs on both sides of the steel box girder body, and the flange U-rib is located at the mid-span position of the steel box girder and has a flange U-rib air outlet.

[0010] Furthermore, a number of temperature and humidity sensors are arranged inside the steel box girder body, and one temperature and humidity sensor is arranged every 14m. The even distribution of the temperature and humidity sensors is conducive to detecting the humidity level of each part of the air inside the steel box girder body, so as to facilitate starting and stopping the dehumidification operation.

[0011] Furthermore, one end of the air supply duct located at the mid-span position within the steel box girder body is vertically connected to an air outlet duct, and a plurality of steel box girder air supply ports are opened on the air outlet duct, which increases the air outlet speed and improves the ventilation efficiency during the dehumidification operation.

[0012] Furthermore, an air duct hanger is provided at the top end of the steel box girder body, and the air duct hanger is used to fix the air duct.

[0013] Furthermore, the duct hanger includes a top plate channel steel fixed to the steel box girder via a nut, and the air supply duct is fixed to the duct hanger via an angle iron bracket.

[0014] Furthermore, outer web air holes are provided on the outer web of the steel box girder to balance the air pressure in the steel box girder body 1 .

[0015] Furthermore, equipment bottom plates are provided on the bottom surfaces at both ends of the steel box girder body, and the dehumidifier, steel box girder pressurizing fan, and flange U-rib pressurizing fan are all provided on the equipment bottom plates.

[0016] Furthermore, flange sealing end plates are provided at both ends of the flange U-rib, and the flange U-rib air supply port is located on the inner side of the flange sealing end plate. The flange sealing end plate can block external humid air from entering the flange U-rib and can make the air flow in the flange U-rib directional.

[0017] Furthermore, dustproof nets are provided on the steel box girder air inlet, the steel box girder air supply port, the flange U-rib air supply port, the flange U-rib air outlet and the outer web air hole.

[0018] Furthermore, the auxiliary air supply pipe is tightly connected to the flange U-rib air supply port via a connecting air duct.

[0019] Furthermore, the flange U-rib is connected to a filter air duct at the mid-span of the steel box girder, a plurality of through holes are opened on the filter air duct, one end of the filter air duct is tightly connected to the outer web air hole, the other end of the filter air duct is closed, a dustproof net is arranged in the through hole, and one end of the through hole is tightly connected to the flange U-rib air outlet.

[0020] The beneficial effects of the technical solution provided by the utility model are as follows: the dehumidification device has a relatively simple structure and is easy to use, avoids excessive consumption of materials, reduces costs, and allows the air inside the steel box girder to circulate with the outside air, and processes the outside air through the dehumidifier and the activated carbon adsorption area, which not only achieves dehumidification inside the main body of the steel box girder but also achieves dehumidification of the flange U ribs, thereby effectively slowing down the corrosion rate of the steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings used in the embodiments. Obviously, the drawings listed below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the left half of the overall structure of an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the right half of the overall structure of an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the left half of a top view of an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the right half of a top view of an embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the left half of the air circulation inside the steel box girder of the embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of the right half of the air circulation inside the steel box girder of the embodiment of the utility model;

[0028] Figure 7 It is a side view schematic diagram of the position of the flange U-rib pressure fan of an embodiment of the utility model;

[0029] Figure 8It is a side view schematic diagram of the position of the pressurized fan inside the steel box girder of an embodiment of the utility model;

[0030] Fig. 9 It is a side view schematic diagram of the location of the dehumidifier inside the steel box girder of an embodiment of the utility model;

[0031] Fig.10 It is a structural schematic diagram of an air duct hanger according to an embodiment of the utility model.

[0032] In the attached drawings, the list of components represented by each number is as follows: 1. Steel box girder body; 2. Duct hanger; 3. Air supply duct one; 4. Steel box girder air inlet; 5. Regeneration air duct; 6. Dehumidifier; 7. Equipment bottom plate; 8. Activated carbon adsorption area; 9. Steel box girder pressurized fan; 10. Steel box girder air supply outlet; 11. Flange U-rib pressurized fan; 12. Air supply duct two; 13. Air supply auxiliary duct; 14. Connecting air duct; 15. Flange U-rib air supply outlet; 16. Filter air duct 17. Outer web air hole; 18. Flange U-rib air outlet; 19. Temperature and humidity sensor; 20. Top plate channel steel; 21. Angle iron bracket; 22. Nut; 23. Flange U-rib; 24. Flange sealing end plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] See also Figures 1 to 8 The embodiment of the utility model provides a steel box girder dehumidification device, including a dehumidifier 6 arranged on the inner bottom surface of both ends of the steel box girder body 1, a steel box girder air inlet 4 is opened on the inner bottom surface of both ends of the steel box girder body 1, one end of the dehumidifier 6 air inlet is connected to the steel box girder air inlet 4 through a regeneration air duct 5, one end of the dehumidifier 6 air outlet is connected to an activated carbon adsorption area 8, the other side of the activated carbon adsorption area 8 is connected to a steel box girder pressurizing fan 9, and one end of the steel box girder pressurizing fan 9 outlet is connected to an air supply duct 3 The other end of the air supply pipe 1 3 is located at the mid-span position inside the steel box girder body 1; flange U-rib pressurized fans 11 are arranged on the inner bottom surfaces at both ends of the steel box girder body 1, and the outlet end of the flange U-rib pressurized fans 11 is connected to the air supply auxiliary pipe 13 through the air supply pipe 2 12, and a flange U-rib air supply port 15 is opened on the flange U-rib 23, and both ends of the air supply auxiliary pipe 13 are respectively connected to the flange U-ribs 23 on both sides of the steel box girder body 1, and the flange U-rib is located at the mid-span position of the steel box girder and is provided with a flange U-rib air outlet 18.

[0035] A plurality of temperature and humidity sensors 19 are arranged inside the steel box girder body 1 , and one temperature and humidity sensor 19 is arranged every 14 m; an air duct hanger 2 is arranged at the top end of the steel box girder body 1 .

[0036] Among them, the connection between the dehumidifier 6, the steel box girder pressurizing fan 9, the flange U-rib pressurizing fan 11, the temperature and humidity sensor and the connection of their control system are electrical connections and are existing technologies, which will not be repeated here.

[0037] One end of the air supply pipe 3 located at the mid-span position in the steel box girder body 1 is vertically connected to the air outlet pipe, and a plurality of steel box girder air supply ports 10 are opened on the air outlet pipe.

[0038] The air duct hanger 2 includes a top plate channel steel 20 fixed to the steel box girder through a nut 22, and the air supply pipe 3 is fixed to the air duct hanger 2 through an angle iron bracket 21.

[0039] Outer web air holes 17 are provided on the outer web of the steel box girder.

[0040] Equipment bottom plates 7 are provided on the bottom surfaces at both ends of the steel box girder body 1 , and the dehumidifier 6 , the steel box girder pressurizing fan 9 , and the flange U-rib pressurizing fan 11 are all provided on the equipment bottom plates 7 .

[0041] Flange sealing end plates 24 are provided at both ends of the flange U-rib 23 , and the flange U-rib air supply port 15 is located inside the flange sealing end plate 24 .

[0042] The steel box girder air inlet 4 , the steel box girder air outlet 10 , the flange U-rib air outlet 15 , the flange U-rib air outlet 18 and the outer web air hole 17 are all provided with dustproof nets.

[0043] The auxiliary air supply pipe 13 is tightly connected to the flange U-rib air supply port 15 via the connecting air pipe 14 .

[0044] The flange U-rib 23 is located at the mid-span of the steel box girder and is connected to a filter air duct 16. A number of through holes are opened on the filter air duct 16. One end of the filter air duct 16 is tightly connected to the outer web air hole 17, and the other end of the filter air duct 16 is closed. A dustproof net is arranged in the through hole, and one end of the through hole is tightly connected to the flange U-rib air outlet 15.

[0045] Working principle: The temperature and humidity sensor in the steel box girder body 1 transmits the detected air temperature and humidity data to the control system. When dehumidification is required, the dehumidifier 6, the steel box girder pressurized fan 9 and the flange U-rib pressurized fan 11 are started, and the external fresh air enters the dehumidifier 6 through the steel box girder air inlet 4 and the regeneration air duct 5 for dehumidification treatment, and then passes through the activated carbon adsorption area 8 for filtration and adsorption, effectively alleviating the steel box girder rust problem in chemical industry developed areas and areas with serious pollution and dust. The dried air passes through the steel box girder pressurized fan 9 and enters the air supply duct 3 The air is transported to the air outlet duct at the mid-span position of the steel box girder body 1, and discharged through multiple steel box girder air supply ports 10. At the same time, the flange U-rib pressurized fan 11 sucks in the humid air originally inside the steel box girder body 1 and transports it to the flange U-rib 23 through the air supply duct 2 12 and the air supply auxiliary duct 13. The air in the flange U-rib 23 moves to the mid-span position of the steel box girder body 1, and enters the external environment through a number of through holes opened on the filter air duct 16, wherein one end of the filter air duct 16 is closed, and the other end passes through the interior of the steel box girder body 1, thereby balancing the air pressure inside the steel box girder body 1.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel box girder dehumidification device, characterized in that: The invention comprises a dehumidifier (6) arranged on the inner bottom surface of both ends of a steel box girder body (1), and a steel box girder air inlet (4) is opened on the inner bottom surface of both ends of the steel box girder body (1), one end of the air inlet of the dehumidifier (6) is connected to the steel box girder air inlet (4) through a regeneration air duct (5), one end of the air outlet of the dehumidifier (6) is connected to an activated carbon adsorption area (8), the other side of the activated carbon adsorption area (8) is connected to a steel box girder pressurizing fan (9), one end of the outlet of the steel box girder pressurizing fan (9) is connected to an air supply pipe (3), and the other side of the air supply pipe (3) is connected to an activated carbon adsorption area (8). One end is located at the mid-span position inside the steel box girder body (1); flange U-rib pressure fans (11) are arranged on the inner bottom surfaces at both ends of the steel box girder body (1); the outlet end of the flange U-rib pressure fan (11) is connected to an air supply auxiliary pipe (13) through an air supply pipe 2 (12); a flange U-rib air supply port (15) is provided on the flange U-rib (23); both ends of the air supply auxiliary pipe (13) are respectively connected to the flange U-ribs (23) on both sides of the steel box girder body (1); and the flange U-rib is located at the mid-span position of the steel box girder and is provided with a flange U-rib air outlet (18).

2. The steel box girder dehumidification device according to claim 1, characterized in that: A plurality of temperature and humidity sensors (19) are arranged inside the steel box girder body (1).

3. The steel box girder dehumidification device according to claim 1, characterized in that: One end of the air supply pipe 1 (3) located at the mid-span position of the steel box girder body (1) is vertically connected to an air outlet pipe, and a plurality of steel box girder air supply ports (10) are provided on the air outlet pipe.

4. The steel box girder dehumidification device according to claim 1, characterized in that: An air duct hanger (2) is arranged at the top end of the steel box girder body (1).

5. The steel box girder dehumidification device according to claim 4, characterized in that: The air duct hanger (2) is fixed to the top plate channel steel (20) of the steel box beam via a nut (22), and the air supply pipe 1 (3) is fixed to the air duct hanger (2) via an angle iron bracket (21).

6. The steel box girder dehumidification device according to claim 1, characterized in that: The outer web of the steel box girder is provided with outer web air holes (17).

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