Dehumidifying and anti-freezing system for steel box girder road bridge

Abstract

The utility model relates to a dehumidifying and anti-freezing system for a steel box girder road bridge. The dehumidifying and anti-freezing system comprises a heating device, a detection device and a control device, a closed and through cavity is formed in the steel box girder road bridge; a heating device is arranged below the steel box girder road bridge; the heating device is connected with an access hole of the steel box girder road bridge through a fan and an air pipe; a detection device is arranged inside and / or outside the cavity of the steel box girder road bridge; and the heating device and the detection device are connected with the control device. The dehumidifying and anti-freezing system for the steel box girder road bridge can be additionally arranged for later construction of the steel box girder road bridge; after the system is operated, dehumidification and freezing prevention can be effectively implemented, the corrosion risk probability of a steel structure is reduced, especially skiing and deicing can be achieved in winter, the traffic safety of a road surface is improved, full-automatic operation of the system can be achieved, and manpower is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a road bridge dehumidification and anti-freezing system, especially for the dehumidification and anti-freezing system of the road bridge using steel box girder. BACKGROUND

[0002] After entering winter, the average temperature in East China / Yangtze River Delta is above 0℃, but there are about 10 days of weather below 0℃ every year, and generally accompanied by rainfall, which easily causes road icing; for the drivers in this area, when driving to the road icing section, it is easy to cause vehicle out of control, causing traffic accidents, causing the loss of vehicles and road facilities. And through research and analysis, the icing and snow accumulation of steel box girder bridge with large thermal conductivity are more prominent.

[0003] For the situation of road icing, generally only according to the weather forecast, make good plans, timely organize road and sanitation personnel to spread salt and deice, or mechanical deicing operation, time-consuming and laborious; and the salt spread for deicing will flow along the road after the ice and snow melt, especially for the viaduct and other road bridges with steel box girder structure, which will cause corrosion to the steel structure and affect the safety and reliability of the steel box girder bridge. And using pre-arranged heat exchange pipes in the concrete of the bridge deck, deicing operation is carried out through heat pipes, which has high requirements for the paving of the road concrete, and it is difficult to maintain and repair in the later period. Once damaged, it is difficult to replace, with high use cost and high cost.

[0004] For the existing steel box girder bridge, it is necessary to design a special dehumidification and anti-freezing system according to its structural characteristics, in order to reduce the dependence on manual deicing operation, realize the function of preventing road bridge deck icing in winter, ensure the driving safety of road bridge deck in winter, and dehumidify in the plum rain season and other high humidity weather, so as to improve the corrosion resistance of steel box girder and prolong the structural durability. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a steel box girder bridge dehumidification and anti-freezing system, which monitors the condition of the steel box girder bridge deck through the control system, starts the heating and dehumidification device in time to heat the steel box girder, realizes dehumidification and anti-freezing, improves the driving safety of road bridge deck in winter, and improves the corrosion resistance of steel box girder.

[0006] In order to achieve the above utility model purposes, the utility model provides a steel box girder bridge dehumidification and anti-freezing system, which comprises a heating device, a detection device and a control device.

[0007] The steel box girder bridge is a closed and through cavity; the heating device is arranged below the steel box girder bridge.

[0008] The heating device is connected with the inspection hole of the steel box girder bridge through the fan and the air pipe.

[0009] The chamber of the steel box girder road bridge and / or the outside of the chamber is provided with a detection device;

[0010] The heating device, the detection device and the control device are connected.

[0011] As a further improvement of the utility model, the heating device comprises a combustion furnace;

[0012] An air draught fan is arranged on the combustion furnace, one end of the air draught fan is connected with the combustion furnace through a wind pipe, the other end of the air draught fan is connected with the maintenance port cover through an air inlet pipe, and the maintenance port cover is connected with the maintenance port of the steel box girder road bridge in airtight mode.

[0013] Further, an electric air valve is arranged between the air inlet pipe and the maintenance port cover.

[0014] Further, a heat exchange device is arranged in or outside the combustion furnace.

[0015] Both ends of the steel box girder road bridge are provided with maintenance ports, and the maintenance port covers are arranged outside the maintenance ports.

[0016] The maintenance port cover at one end is connected with the air inlet pipe, and the maintenance port cover at the other end is connected with the heat exchange device through a gas return pipe.

[0017] As a further improvement of the utility model, the detection device comprises an external detection device arranged on the road surface above the steel box girder road bridge.

[0018] The external detection device comprises a camera and a thermal imager.

[0019] As a further improvement of the utility model, the detection device comprises an internal detection device arranged in the chamber of the steel box girder road bridge.

[0020] The internal detection device is a temperature and humidity sensor, and a plurality of temperature and humidity sensors are arranged in the chamber in a segmented mode along the length direction.

[0021] As a further improvement of the utility model, the detection device comprises a strain monitoring sensor.

[0022] The strain monitoring sensor is arranged in groups on the top and the bottom of the chamber of the steel box girder road bridge.

[0023] As a further improvement of the utility model, the detection device comprises a displacement sensor.

[0024] The displacement sensor is arranged on the bottom surface of both ends of the steel box girder road bridge and is arranged near the pier.

[0025] As a further improvement of the utility model, an axial flow fan is arranged in the chamber of the steel box girder road bridge along the length direction.

[0026] The axial flow fan is connected with the control device.

[0027] Further, the axial flow fan is provided with several sets, and the axial flow fans are arranged in sections along the length direction of the chamber.

[0028] As a further improvement of the utility model, a general control center is arranged, and the general control center is connected with the control device.

[0029] The steel box girder road bridge dehumidification and anti-freezing system can be implemented in the later construction and additional installation, and after the system is operated, dehumidification and anti-freezing can be effectively implemented, the corrosion risk probability of the steel structure is reduced, especially, snow melting and ice removing can be realized in winter, the traffic safety of the road surface is improved, and the system can realize full-automatic operation, and the manpower is greatly reduced.

[0030] When it is a humid rainy season, the combustion furnace is started in time to form dry hot air, and then the dry hot air is introduced into the chamber, so that the interior of the steel box girder road bridge is in a reasonable humidity range, and the corrosion resistance of the internal structure is better improved; meanwhile, the air has a certain heat, so that the steel structure is heated to be slightly higher than the ambient temperature, and water vapor is not easy to condense, and the external corrosion of the steel structure is avoided.

[0031] When it is a low-temperature weather in winter, snow melting and ice removing are needed, the combustion furnace is started, high-power combustion is realized, heat is fully generated, and the heat is introduced into the chamber; hot air rises, and the upper part of the steel box girder road bridge is mainly heated, so that the upper surface (the concrete layer) of the road surface is finally stably above zero degrees, so that the snow is timely melted into water, and the water is discharged through the drainage system, and even under the condition of winter rain, low-temperature icing does not occur.

[0032] The control cabinet combines the thermal imager and the environment sensor, the road surface condition and the environment, and the internal temperature and humidity sensor to adjust the combustion power of the combustion furnace, the opening degree of the electric air valve and the air conveying flow of the axial flow fan at each place, so that the heat is reasonably distributed and fully utilized, and local rapid heating is avoided, so that the large deformation of the steel box girder road bridge steel structure after local heating is avoided, and the risk of road bridge deformation is caused.

[0033] The general control center can start the combustion furnace in advance according to the weather forecast, so that the sudden temperature drop does not cause the road surface to be unable to be heated in a short time and cause icy road sliding. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The utility model discloses a kind of steel box girder road bridge dehumidification and anti-freezing devices of whole structure schematic Figure 1 ;

[0035] Figure 2 The utility model discloses a kind of steel box girder road bridge dehumidification and anti-freezing devices of whole structure schematic Figure 2 ;

[0036] Figure 3The overall structure internal section view of the steel box girder road bridge dehumidification and anti-freezing device Figure 1 ;

[0037] Figure 4 The overall structure internal section view of the steel box girder road bridge dehumidification and anti-freezing device Figure 2 ;

[0038] Figure 5 The overall structure of the steel box girder road bridge dehumidification and anti-freezing system. DETAILED DESCRIPTION

[0039] The specific embodiments of the utility model will be further described in detail below with reference to the drawings.

[0040] The steel box girder road bridge dehumidification and anti-freezing system of the utility model, including dehumidification and anti-freezing device, and control system, wherein, the arrangement of dehumidification and anti-freezing device is as shown in Figures 1-4 , and the connection schematic diagram of control system and dehumidification and anti-freezing device is as shown in Figure 5 .

[0041] The steel box girder road bridge dehumidification and anti-freezing system of the utility model is installed on the steel box girder road bridge 1, and the steel box girder road bridge 1 is generally a closed chamber 11, the chamber 11 is separated by a plurality of partitions, and the partitions are provided with through holes 12, which pass through the chamber 11 of the entire steel box girder road bridge 1; generally, a maintenance opening 13 is arranged at the lower part of the two ends of the steel box girder road bridge 1 and is communicated with the chamber 11, so that personnel can enter the steel box girder road bridge 1 for maintenance.

[0042] The steel box girder road bridge dehumidification and anti-freezing system of the utility model passes heated air into the chamber 11 of the steel box girder road bridge 1, thereby dehumidifying the steel box girder road bridge 1 and preventing the road surface on the upper surface of the steel box girder road bridge 1 from freezing.

[0043] The steel box girder road bridge dehumidification and anti-freezing system of the utility model specifically includes a heating device 2, and generally adopts a combustion furnace 21 due to the large heating power, the heat generated by combustion in the combustion furnace 21 is upwardly conveyed through an air inlet pipe 22, and then input into the chamber 11 through the maintenance opening 13 by a maintenance opening cover 23, and the hot air enters from the maintenance opening 13 at one end of the steel box girder road bridge 1 and is discharged from the maintenance opening 13 at the other end.

[0044] Preferably, the discharged cooling air is returned to the combustion furnace 21 through a gas return pipe 25, and the cooling air is preheated by a heat exchange device in the combustion furnace 21, so as to accelerate the temperature rise and save fuel.

[0045] When the combustion furnace 21 is selected, the branches generated by the municipal autumn and winter pruning of the greenery can be combined with the pulverization to form the biomass fuel (wood chips, leaves) and the like, the biomass combustion furnace is selected, the biomass generated by the municipal greenery is consumed by adding the biomass fuel, and the ash generated by the combustion can be used as the municipal greenery fertilizer after the spring and is directly used.

[0046] Two maintenance openings 13 are generally arranged on each side below the steel box girder road bridge 1, so that two maintenance opening covers 23 need to be arranged on the two sides respectively, and the corresponding air inlet pipe 22 and air return pipe 25 also need to be divided into two parts and connected with the maintenance opening cover 23 respectively.

[0047] The electric air valve 24 is further arranged between the air inlet pipe 22 and the maintenance opening cover 23, the electric air valve 24 adjusts the heat and flow rate entering the maintenance opening 13, so that the steel box girder road bridge 1 is uniformly heated.

[0048] Two induced draft fans 26 are arranged on the combustion furnace 21, one end of the induced draft fan 26 is connected with the combustion furnace 21 through the air pipe 27, and the other end is connected with the air inlet pipe 22 or the air return pipe 25 respectively; one induced draft fan 26 inputs the hot air generated by the combustion of the combustion furnace 21 into the air inlet pipe 22, and the other induced draft fan 26 extracts the air after being cooled from the chamber 11, and then inputs the air into the heat exchange device for preheating of the combustion air.

[0049] The external detection device 3 is arranged on the road surface above the steel box girder road bridge 1, and includes the camera 31 and the thermal imager 32, and is generally arranged at a high position through the stand column to monitor the condition of the road surface; the camera 31 generally adopts the fast ball camera, and the monitoring range can be expanded by rotating; the thermal imager 32 detects the surface temperature of the road surface through the infrared detection. The environmental sensor 33 is further arranged to monitor the temperature, humidity, wind direction and the like of the road surface, and the low-temperature side of the windward surface is more prone to low temperature. For convenient transmission, the wireless transmission antenna 34 can be further arranged to send and feed back the monitoring condition of the external detection device 3.

[0050] A plurality of axial flow fans 4 are arranged in the chamber 11 of the steel box girder road bridge 1 along the length direction, the axial flow fans 4 are arranged in sections along the length direction of the chamber 11, so that the heat can be more efficiently transmitted from one end of the chamber 11 to the other end, and the heat is uniformly distributed along the length direction of the chamber 11.

[0051] The internal detection device 5 is arranged in the chamber 11 of the steel box girder road bridge 1, mainly including the temperature and humidity sensor 52, and is arranged in sections along the length direction of the chamber 11 to detect the heat distribution condition in the chamber 11, and then cooperate with the axial flow fan 4 to adjust the heat distribution condition, so as to avoid that the heat is too concentrated at the inlet.

[0052] The internal detection device 5 also includes strain monitoring sensors 51, which are grouped and attached to the top and bottom of the chamber 11 to monitor the strain at key locations. Furthermore, displacement sensors 6 are installed on the bottom surfaces at both ends of the steel box girder bridge 1, near the piers. The health of the bridge is monitored using the strain monitoring sensors 51 and the displacement sensors 6.

[0053] like Figure 5 As shown, a control cabinet 7 is installed on site at the steel box girder road bridge 1. It is connected to the combustion furnace 21, the induced draft fan 26, the electric air valve 24, the axial flow fan 4, and various sensors (external detection device 3 and internal detection device 5) to control the stable operation of the dehumidification and antifreeze device.

[0054] During the humid rainy season, the combustion furnace 21 is started and burned at low power to generate dry hot air, which is then introduced into the chamber 11. This keeps the interior of the steel box girder bridge 1 within a reasonable humidity range, which can better improve the corrosion resistance of the internal structure. At the same time, the air carries a certain amount of heat, which heats the steel structure to a temperature slightly higher than the ambient temperature, making it less likely for water vapor to condense and preventing corrosion of the exterior of the steel structure.

[0055] When snow and ice need to be removed in cold winter weather, the combustion furnace 21 is started and the combustion is carried out at high power to generate heat. The heat is then introduced into the chamber 11, and the hot air rises, mainly heating the upper part of the steel box girder bridge 1. This ensures that the surface of the road (concrete layer) is kept stable above zero degrees Celsius, so that the snow will melt into water in time and be discharged through the drainage system. Even in winter rainy conditions, low-temperature freezing will not occur.

[0056] The control cabinet 7, in conjunction with the thermal imager 32 and the environmental sensor 33, monitors the road surface and surrounding environment. Combined with the internal temperature and humidity sensor 52, it adjusts the combustion power of the combustion furnace 21, the opening and closing degree of the electric air valve 24, and the air flow of the axial flow fans 4 at various locations. This ensures that the heat is reasonably distributed and fully utilized, while avoiding localized rapid heating that could cause large deformation of the steel structure of the steel box girder bridge 1 due to localized heating, thus posing a risk of bridge deformation.

[0057] The control cabinet 7 is also connected to the central control center 8, which sends the monitoring data of the strain monitoring sensor 51 and the displacement sensor 6 to the central control center 8 in a timely manner for monitoring and analyzing the health status of the steel box girder bridge 1.

[0058] The steel box girder road bridge dehumidification and anti-freezing system can be implemented by adding a combustion furnace 21 and a control cabinet 7 on the bridge pier, and does not occupy the space under the steel box girder road bridge, and can effectively implement dehumidification and anti-freezing, reduce the corrosion risk probability of the steel structure, and especially can realize snow skiing and ice melting in winter, improve the traffic safety of the road surface, and can realize full-automatic operation, and greatly reduce the manpower.

[0059] The preferred embodiments of the utility model have been specifically described above, but the utility model is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the application.

Claims

1. Steel box girder road and bridge dehumidification and anti-freezing system, characterized in that, The warming device, the detecting device, and the control device are connected. The steel box girder road bridge is provided with a warming device. The warming device is connected to the inspection opening of the steel box girder road bridge through a fan and a wind pipe. The detecting device is arranged in the chamber and / or outside the steel box girder road bridge. The warming device, the detecting device, and the control device are connected.

2. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The warming device comprises a combustion furnace. The combustion furnace is provided with an air induction fan.

3. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 2, characterized in that, The air induction fan is connected to the combustion furnace through a wind pipe.

4. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 2, characterized in that, The air induction fan is connected to the inspection opening cover through an air inlet pipe. An electric air valve is arranged between the air inlet pipe and the inspection opening cover. The combustion furnace is provided with a heat exchange device.

5. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The steel box girder road bridge is provided with an inspection opening at each end. The inspection opening cover at one end is connected to the air inlet pipe.

6. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The inspection opening cover at the other end is connected to the heat exchange device through a gas return pipe. The detecting device comprises an external detecting device arranged on the road surface above the steel box girder road bridge.

7. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The external detecting device comprises a camera and a thermal imager. The detecting device comprises an internal detecting device arranged in the chamber of the steel box girder road bridge.

8. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The internal detecting device is a temperature and humidity sensor. The temperature and humidity sensor is arranged in segments along the length direction of the chamber.

9. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The detecting device comprises a strain monitoring sensor. The strain monitoring sensor is arranged in groups on the top and bottom of the chamber of the steel box girder road bridge.

10. The steel box girder road and bridge dehumidification and anti-freezing system according to claim 1, characterized in that, The detecting device comprises a displacement sensor. The displacement sensor is arranged on the bottom surface of the steel box girder road bridge near the pier. An axial flow fan is arranged in the chamber of the steel box girder road bridge along the length direction. The axial flow fan is connected to the control device. A general control center is arranged. The general control center is connected to the control device.

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