Continuous steel box girder structure with spraying system

Abstract

The utility model discloses a continuous steel box girder structure with a spraying system, which comprises a box girder and a spraying mechanism, and is characterized in that the box girder comprises a main body girder and cantilevers arranged on the two sides of the main body girder, and the interior of the main body girder is of a hollow structure; the spraying mechanism comprises a water storage tank arranged at the outer end of the cantilever arm, an energy storage mechanism mounted at the upper end of the water storage tank, a control panel arranged at the side end of the water storage tank, a conveying pipe mounted in the cantilever arm and communicated with the interior of the main body beam, a temperature control system arranged in the main body beam, and a drainage mechanism arranged in a bottom plate of the main body beam; the spraying pipes are mounted on the inner side wall and the upper end of the main body beam, and the two ends of the conveying pipe are communicated with the spraying pipes and the water storage tank respectively. According to the utility model, a dredging method in structural fire prevention is applied, when a fire hazard comes, the temperature of the steel box girder bridge can be reduced through water spraying, the possibility of structural damage of a hogging moment area is reduced, and time is won for fire hazard extinguishment.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, and particularly relates to a steel box girder structure with a built-in sprinkler system. Background Art

[0002] During the early stage of a fire, the continuous steel box girder will experience a drastic internal force redistribution, with the negative moment area expanding rapidly and the mid-support reaction force increasing suddenly to more than twice that at normal temperature. At high temperatures, the mechanical properties of steel will be significantly reduced. Once the fire duration on the box girder is too long, the box girder structure is likely to be damaged. Therefore, applying fireproof coatings on the surface of the box girder can achieve the purpose of reducing the surface temperature, thereby delaying or avoiding structural damage. There are many methods to effectively suppress or avoid fires. The most commonly used measure is to apply fireproof coatings on the surface of the structure, and the diversion method such as spraying and cooling can also be used to control the temperature of the bridge. Content of the Utility Model

[0003] Therefore, in order to solve the above technical problems, the utility model provides a continuous steel box girder structure with a built-in sprinkler system.

[0004] In order to achieve the above technical effects, the utility model is realized through the following technical solutions: a continuous steel box girder structure with a built-in sprinkler system, including a box girder and a sprinkler mechanism, characterized in that: the box girder includes a main beam and cantilevers arranged on both sides of the main beam. The inside of the main beam is a hollow structure, and transverse stiffeners are equidistantly arranged inside the main beam; the sprinkler mechanism includes a water storage tank arranged at the outer end of the cantilever, an energy storage mechanism installed at the upper end of the water storage tank, a control panel arranged at the side end of the water storage tank, a delivery pipe installed inside the cantilever and communicating with the inside of the main beam, a temperature control system arranged inside the main beam, a drainage mechanism arranged in the bottom plate of the main beam, and sprinkler pipes installed on the inner side wall and the upper end of the main beam. Both ends of the delivery pipe are respectively communicated with the sprinkler pipes and the water storage tank.

[0005] Further, a water inlet pipe is arranged at the top end of the water storage tank, a solenoid valve is arranged in the middle of the water inlet pipe, a liquid level sensor is arranged inside the water storage tank, a liquid extraction pump is arranged at the side end of the water storage tank, and the water inlet end of the liquid extraction pump is communicated with the inside of the water storage tank through a pipeline; the delivery pipe is connected to the water outlet end of the liquid extraction pump; the solenoid valve, the liquid level sensor and the liquid extraction pump are all electrically connected to the control panel.

[0006] Further, the temperature control system includes a temperature sensor arranged in the top plate of the negative moment area of the main beam and an electric temperature control valve arranged on the delivery pipe; the temperature sensor and the electric temperature control valve are both electrically connected to the control panel.

[0007] Further, heat insulation coatings are applied on both the inner and outer walls of the water storage tank.

[0008] Furthermore, the energy storage mechanism includes a mounting frame provided at the upper end of the water storage tank, a storage battery provided inside the mounting frame, and a solar panel mounted on the upper end of the mounting frame; the solar panel is electrically connected to the storage battery, and the storage battery is electrically connected to the control panel.

[0009] Furthermore, the drainage mechanism includes a plurality of water collecting holes provided between two adjacent transverse stiffeners on the bottom plate of the main beam, a water collecting pipe installed inside the bottom plate of the main beam, a connecting pipe connecting the water collecting holes and the water collecting pipe, and a drainage pipe passing through the bottom plate of the main beam and communicating with the water collecting pipe.

[0010] Furthermore, the spray pipe includes a main pipe installed on the inner side wall and the upper transverse stiffener of the main beam, branch pipes equidistantly distributed on the main pipe, and a plurality of nozzles equidistantly installed on the branch pipes.

[0011] Furthermore, the control panel includes control buttons, a display screen, an alarm, a storage module, a liquid pumping control module, a temperature comparison module, a valve body control module, and a central processing unit; the control buttons, the storage battery, the liquid level sensor, the display screen, and the alarm are all electrically connected to the control panel, the temperature sensor and the electric temperature control valve are electrically connected to the central processing unit through the temperature comparison module, the solenoid valve is electrically connected to the central processing unit through the valve body control module, and the liquid pumping pump is electrically connected to the central processing unit through the liquid pumping control module.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The present utility model applies the dredging method in structural fire protection. When a fire breaks out, the temperature sensor measures the temperature of the environment inside the steel box girder. When the temperature rises to the preset threshold value of the storage module, the control panel controls the opening of the electric temperature control valve and simultaneously controls the liquid pumping pump to supply water to the spray pipe. The steel box girder is water-sprayed through the spray pipe. The water-spraying can reduce the temperature of the steel box girder bridge, reduce the possibility of structural damage in the negative moment area, gain time for extinguishing the fire, protect people's safety, and reduce the impact of the fire. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is the overall structural schematic diagram of the present utility model;

[0016] Figure 2 is the front view of the present utility model;

[0017] Figure 3 It is the side view of the present utility model;

[0018] Figure 4 It is the top view of the present utility model;

[0019] Figure 5 It is the schematic diagram of the internal structure of the present utility model;

[0020] Figure 6 It is the present utility model Figure 5 The enlarged schematic diagram of part A in it.

[0021] In the attached drawings, the list of components represented by each reference number is as follows:

[0022] 1. Main body beam; 2. Cantilever; 3. Water storage tank; 31. Water inlet pipe; 32. Solenoid valve; 33. Liquid level sensor; 34. Liquid pumping pump; 4. Energy storage mechanism; 41. Mounting rack; 42. Battery; 43. Solar panel; 5. Control panel; 6. Delivery pipe; 7. Temperature control system; 71. Temperature sensor; 72. Electric temperature control valve; 8. Drainage mechanism; 81. Water collecting hole; 82. Water collecting pipe; 83. Connecting pipe; 84. Drain pipe; 85. Transverse stiffening rib; 9. Spraying pipe; 91. Main pipe; 92. Branch pipe; 93. Sprinkler head. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0024] Embodiment 1

[0025] A continuous steel box girder structure with a built-in spraying system, including a box girder and a spraying mechanism, characterized in that: the box girder includes a main body beam 1 and cantilevers 2 arranged on both sides of the main body beam 1, and the inside of the main body beam 1 is a hollow structure; the spraying mechanism includes a water storage tank 3 arranged at the outer end of the cantilever 2, an energy storage mechanism 4 installed at the upper end of the water storage tank 3 and a control panel 5 arranged at the side end of the water storage tank 3, a delivery pipe 6 installed inside the cantilever 2 and communicating with the inside of the main body beam 1, a temperature control system 7 arranged inside the main body beam 1, a drainage mechanism 8 arranged inside the bottom plate of the main body beam 1, and a spraying pipe 9 installed on the inner side wall and the upper end of the main body beam 1, and both ends of the delivery pipe 6 are respectively communicated with the spraying pipe 9 and the water storage tank 3.

[0026] A water inlet pipe 31 is provided at the top of the water storage tank 3. A solenoid valve 32 is provided in the middle of the water inlet pipe 31. A liquid level sensor 33 is provided inside the water storage tank 3. A liquid extraction pump 34 is provided at the side end of the water storage tank 3. The water inlet end of the liquid extraction pump 34 is connected to the inside of the water storage tank 3 through a pipeline. The delivery pipe 6 is connected to the water outlet end of the liquid extraction pump 34. The solenoid valve 32, the liquid level sensor 33 and the liquid extraction pump 34 are all electrically connected to the control panel 5. The liquid level in the water storage tank 3 can be monitored in real time by the liquid level sensor. When the liquid level is lower than the height preset by the storage module, the control panel can be actively provided to control the solenoid valve 32 to open, and the water storage tank 3 can be actively filled with water. The water in the water storage tank 3 can be extracted by the provided liquid extraction pump 34, and the water can be pressurized and transported to the delivery pipe 6.

[0027] The temperature control system 7 includes a temperature sensor 71 provided in the top plate of the negative bending moment area of the main girder 1, and an electric temperature control valve 72 provided on the delivery pipe 6. The temperature sensor 71 and the electric temperature control valve 72 are both electrically connected to the control panel 5. The temperature sensor 71 can monitor the temperature in the top plate of the negative bending moment area of the main girder 1 in real time, and perform temperature comparison through the temperature comparison module. When the monitored temperature is higher than the threshold temperature preset inside the storage module, the control panel 5 can actively control the electric temperature control valve 72 to open, and at the same time control the liquid extraction pump 34 to start for spraying inside the steel box girder.

[0028] Heat insulation coatings are applied to both the inner and outer walls of the water storage tank 3, which can ensure that the water in the water storage tank 3 will not be affected by the external temperature too quickly. At the same time, the low temperature of the water in the water tank 3 will not be conducted outward, better ensuring the temperature of the water in the tank.

[0029] The energy storage mechanism 4 includes a mounting frame 41 provided at the upper end of the water storage tank 3, a storage battery 42 provided inside the mounting frame 41, and a solar panel 43 mounted at the upper end of the mounting frame 41. The solar panel 43 is electrically connected to the storage battery 42, and the storage battery 42 is electrically connected to the control panel 5. The setting of the solar panel 43 can automatically convert solar energy into electrical energy and store the electrical energy in the storage battery 42, realizing energy self-sufficiency, reducing the dependence on external power sources, and ensuring that when a fire occurs, the interruption of the external power supply to the normal use of the device can be reduced.

[0030] The drainage mechanism 8 includes a plurality of water collecting holes 81 provided between two adjacent transverse stiffeners 85 on the bottom plate of the main girder 1, a water collecting pipe 82 installed inside the bottom plate of the main girder 1, a connecting pipe 83 connecting the water collecting holes 81 and the water collecting pipe 82, and a drainage pipe 84 passing through the bottom plate of the main girder 1 and connected to the water collecting pipe 82. The cooperation of the water collecting holes 81 and the connecting pipe 83 can collect the water after spraying into the water collecting pipe 82, and then discharge it outward through the drainage pipe 84.

[0031] The spray pipe 9 includes a main pipe 91 installed on the inner side wall of the main body beam 1 and the upper transverse stiffeners, branch pipes 92 equidistantly distributed on the main pipe 91, and a number of spray nozzles 93 equidistantly installed on the branch pipes 92. The spray area and density are increased to ensure uniform spraying inside the steel box girder and uniform cooling of the steel box girder.

[0032] The control panel 5 includes control buttons, a display screen, an alarm, a storage module, a liquid pumping control module, a temperature comparison module, a valve body control module, and a central processing unit; the control buttons, battery, liquid level sensor, display screen, and alarm are all electrically connected to the control panel, the temperature sensor and the electric temperature control valve are electrically connected to the central processing unit through the temperature comparison module, the solenoid valve is electrically connected to the central processing unit through the valve body control module, and the liquid pump is electrically connected to the central processing unit through the liquid pumping control module.

[0033] Embodiment 2

[0034] A fireproof isolation cover is provided outside both the battery 42 and the control panel 5 of the present utility model. The fireproof isolation cover is a metal cover with a heat-insulating coating on its surface; one end of the fireproof isolation cover is hinged to the outside of the water storage tank.

[0035] The water inlet pipe 31, pipeline, delivery pipe 6, and spray pipe 9 of the present utility model are all made of high-temperature resistant materials;

[0036] The solenoid valve 32, liquid pump 34, and electric temperature control valve 72 of the present utility model are high-temperature resistant solenoid valves, high-temperature resistant pumps, and high-temperature resistant control valves.

[0037] The branch pipe 92 of the present utility model is connected to the main pipe 91 through a pipe joint; similarly, the spray nozzle 93 is connected to the branch pipe 92 through a pipe joint; the end of the branch pipe 92 is directly connected to the spray nozzle 93.

[0038] Embodiment 3

[0039] Working principle: This device needs to install the various parts of the spray mechanism accordingly when manufacturing the steel box girder. Specifically, the water tank 3 with the control panel 5, the energy storage device 4, the water inlet pipe 31, the liquid level sensor 33 and the liquid pump 34 are welded to the outside of the cantilever arms 2 on both sides of the steel box girder, and then holes are opened on the cantilever arms 3, and the delivery pipe 6 with the electric temperature control valve 72 is placed into the steel box girder through the holes, and one end of the delivery pipe 6 is connected to the liquid outlet of the liquid pump 34, and then the water pipe clamps are welded on the side walls and the transverse stiffening ribs of the top inner wall of the inner cavity of the main beam 1 of the steel box girder, the main pipe 91 and the branch pipe 92 with the nozzle are clamped into the water inlet pipe clamp, and the main pipe 91 is connected to the other end of the delivery pipe 6 using a water pipe tee joint to complete the installation of the spray pipeline of the spray mechanism; then Then, a plurality of water collection holes 81 are opened between two adjacent transverse stiffening ribs at the bottom end of the main beam 1 of the steel box girder, and then equidistant holes are opened on the water collection pipe 92 according to the spacing of the water collection holes 91, and the connecting pipe 83 is welded to the hole opened on the water collection pipe 82, and then the connecting pipe 83 is passed through the water collection holes 81 in turn and welded, and the water collection holes 81, the connecting pipe 83 and the water collection pipe 82 are connected, and then a new hole is opened at the bottom end of the water collection pipe 82, and the drainage pipe 84 is welded in the new hole to complete the installation of the drainage mechanism, and then the temperature sensor 71 is installed inside the top plate of the negative bending moment area of the main beam 1; then the temperature sensor 71 and circuit components such as the electric temperature control valve 72 are electrically connected to the control panel 5; the installation of the entire spray mechanism can be completed.

[0040] When the temperature sensor 71 installed inside the top plate of the negative bending moment area of the main beam 1 detects that the temperature is higher than the temperature threshold preset by the control panel 5 (inside the storage module), the control panel 5 actively controls the electric temperature control valve 72 to open, and at the same time controls the liquid pump 34 to pump the water inside the water tank 3 to the spray pipe 9, spraying and cooling the inside of the steel box beam, thereby reducing the possibility of structural damage in the negative bending moment area and buying time for extinguishing the fire.

[0041] During the spraying process, when the liquid level sensor 33 detects that the liquid level inside the water tank 3 is higher than or lower than the detection threshold, the control panel 5 actively controls the solenoid valve 32 to open, and continuously replenishes water to the water tank 3 through the water inlet pipe 31 to ensure long-term spraying.

[0042] The control panel 5 on the water tank 3 is initially set by the staff to set the opening threshold of the solenoid valve 32, the opening threshold of the liquid pump 34 and the opening threshold of the electric temperature control valve 72, so that the control panel 5 can automatically control the opening and closing of the solenoid valve 32, the liquid pump 34 and the electric temperature control valve 72 when the monitoring value is greater than or equal to the threshold.

Claims

1. A continuous steel box girder structure with a built-in spraying system, comprising a box girder and a spraying mechanism, characterized in that: The box girder includes a main beam and cantilevers arranged on both sides of the main beam. The inside of the main beam is a hollow structure, and transverse stiffeners are equidistantly arranged inside the main beam; the spraying mechanism includes a water storage tank arranged at the outer end of the cantilever, an energy storage mechanism installed at the upper end of the water storage tank, a control panel arranged at the side end of the water storage tank, a delivery pipe installed inside the cantilever and communicating with the inside of the main beam, a temperature control system arranged inside the main beam, a drainage mechanism arranged inside the bottom plate of the main beam, and spraying pipes installed on the inner side wall and the upper end of the main beam. The two ends of the delivery pipe are respectively communicated with the spraying pipes and the water storage tank.

2. A continuous steel box girder structure with a self - contained spray system according to claim 1, characterized in that, A water inlet pipe is arranged at the top end of the water storage tank, a solenoid valve is arranged in the middle of the water inlet pipe, a liquid level sensor is arranged inside the water storage tank, a liquid extraction pump is arranged at the side end of the water storage tank, and the water inlet end of the liquid extraction pump is communicated with the inside of the water storage tank through a pipeline; the delivery pipe is connected to the water outlet end of the liquid extraction pump; the solenoid valve, the liquid level sensor and the liquid extraction pump are all electrically connected to the control panel.

3. A continuous steel box girder structure with a self - contained spray system according to claim 1, characterized in that, The temperature control system includes a temperature sensor arranged in the top plate of the negative bending moment area of the main beam and an electric temperature control valve arranged on the delivery pipe; the temperature sensor and the electric temperature control valve are both electrically connected to the control panel.

4. A continuous steel box girder structure with a self - contained spray system according to claim 1, characterized in that, Heat insulation coatings are applied to both the inner and outer walls of the water storage tank.

5. A continuous steel box girder structure with a built-in spray system according to claim 1, characterized in that, The energy storage mechanism includes a mounting rack arranged at the upper end of the water storage tank, a storage battery arranged inside the mounting rack, and a solar panel installed at the upper end of the mounting rack; the solar panel is electrically connected to the storage battery, and the storage battery is electrically connected to the control panel.

6. A continuous steel box girder structure with a built-in spray system according to claim 1, characterized in that The drainage mechanism includes a plurality of water collecting holes arranged between two adjacent transverse stiffeners on the bottom plate of the main beam, a water collecting pipe installed inside the bottom plate of the main beam, a communication pipe connecting the water collecting holes and the water collecting pipe, and a drain pipe passing through the bottom plate of the main beam and communicating with the water collecting pipe.

7. A continuous steel box girder structure with a built-in spray system according to claim 1, characterized in that, The spraying pipe includes a main pipe installed on the inner side wall and the upper end transverse stiffeners of the main beam, branch pipes equidistantly distributed on the main pipe, and a plurality of nozzles equidistantly installed on the branch pipes.

8. A continuous steel box girder structure with a self - contained spray system according to claim 1, characterized in that, The control panel includes control buttons, a display screen, an alarm, a storage module, a liquid extraction pump control module, a temperature comparison module, a valve body control module and a central processor; the control buttons, the display screen, the alarm, the storage module, the liquid extraction pump control module, the temperature comparison module and the valve body control module are all electrically connected to the central processor.

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