CN111905315B - Fire monitoring and fire extinguishing method applied to cable-stayed bridge - Google Patents
Fire monitoring and fire extinguishing method applied to cable-stayed bridge Download PDFInfo
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- CN111905315B CN111905315B CN202010738664.3A CN202010738664A CN111905315B CN 111905315 B CN111905315 B CN 111905315B CN 202010738664 A CN202010738664 A CN 202010738664A CN 111905315 B CN111905315 B CN 111905315B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 21
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 120
- 239000007921 spray Substances 0.000 claims description 44
- 238000009434 installation Methods 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 34
- 238000005507 spraying Methods 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 13
- 208000003164 Diplopia Diseases 0.000 claims description 12
- 208000029444 double vision Diseases 0.000 claims description 12
- 238000001931 thermography Methods 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 206010000369 Accident Diseases 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 description 4
- 206010039203 Road traffic accident Diseases 0.000 description 2
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0072—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using sprayed or atomised water
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention provides a fire monitoring and extinguishing method applied to a cable-stayed bridge. It has solved the technical problem that the accident of starting a fire that takes place on the current cable-stayed bridge can't put out a fire fast. The fire monitoring and extinguishing method applied to the cable-stayed bridge comprises the following steps: s1, starting a power supply, and monitoring the bridge surface environment of the stay cable in real time through a sensing control unit; s2, finding fire: s3, fire extinguishing: s4, finishing fire extinguishing; and S5, cleaning the fire scene by maintenance personnel, and continuously monitoring by the sensing control unit. The invention can quickly extinguish fire accidents on the cable-stayed bridge.
Description
Technical Field
The invention belongs to the technical field of cable-stayed bridge fire control, and relates to a fire monitoring and extinguishing method applied to a cable-stayed bridge.
Background
Bridge transportation is an important component of highway transportation in China, and with the use of more transportation vehicles in recent years, the probability of traffic accidents is greatly increased due to the increase of bridge traffic volume, and particularly when flammable and explosive articles are carried by vehicles, fire accidents are easy to happen on bridge surfaces.
The cable-stayed bridge is composed of a stay cable, a cable tower, a main beam and a bridge floor, wherein the load of the bridge floor is transmitted to the stay cable through the main beam and then transmitted to the cable tower through the stay cable.
The fire accident that takes place in the cable-stayed bridge mainly possesses following several characteristics: the fire property of the bridge has higher uncertainty due to uncertain vehicle cargo flammability, unknown traffic accident degree and the like; when a fire accident occurs, the rescue difficulty is high, and the time for an emergency vehicle to arrive at the scene is long; municipal bridge engineering's the degree of difficulty of putting out a fire and fighting fire is great, and traffic jam has usually formed, and the fire source is difficult to be close to the rescue personnel. Generally, when a bridge is in a fire, professional firefighters and rescue workers need a certain time to arrive at a fire scene after a fire alarm facility responds, and the fire is further expanded due to missing of the optimal time point for fire extinguishment.
Therefore, the effective bridge fire fighting device is built, and the emergency treatment efficiency of bridge fire is improved, the spread of the fire is effectively controlled, the loss is reduced, and the life and property safety of personnel is guaranteed.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a fire monitoring and extinguishing method applied to a cable-stayed bridge, which aims to solve the technical problems that: how to monitor and quickly extinguish fire on the bridge surface of the stay cable in real time.
The purpose of the invention can be realized by the following technical scheme: a fire monitoring and extinguishing method applied to a cable-stayed bridge is characterized by comprising the following steps:
s1, starting a power supply, and monitoring the bridge surface environment of the stay cable in real time through a sensing control unit;
s2, finding fire:
s2.1, the MCU sends out an alarm signal;
s2.2, analyzing by the MCU through image data in the infrared double-vision thermal imaging module;
s2.3, determining a fire scene area and a fire source area with the highest temperature;
s2.4, controlling a fire extinguishing device to extinguish fire by the MCU;
s3, fire extinguishing:
if the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are both greater than 8m, namely the fire is small and the fire source is in the middle of the bridge deck, executing S3.1;
if the maximum distance between the fire source area and the boundary of the fire field area is less than or equal to 1m, and the vertical distance between the maximum distance between the boundary of the fire field area and the single-side bridge tower is less than or equal to 8m, namely the fire is small and the fire source is positioned on the single side of the bridge deck, S3.2 is executed;
if the maximum distance between the fire source area and the boundary of the fire scene area is greater than 1m and less than or equal to 5m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are less than or equal to 8m, namely the situation that the fire is great and the fire source spreads to two sides of the bridge floor is performed S3.3;
if the maximum distance between the fire source area and the boundary of the fire field area is more than 5m, namely the fire is great and the fire source is continuously uncontrollable, S3.4 is executed;
s3.1, the fire is little, the prior fire source that the fire source is in the bridge floor middle part is put out a fire:
s3.1a, controlling two side high-pressure spray heads nearest to a fire source area and two side high-pressure spray heads nearest to the fire field area to extinguish fire at the position of the fire source;
s3.1b, when the surface temperature of an object in a fire source area is 30-100 ℃, controlling high-pressure spray heads on two sides closest to the fire scene area to extinguish fire on the boundary of the fire scene area;
s3.1c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.2, the fire is little, the fire source is in the preferential fire source of bridge floor unilateral and puts out a fire:
s3.2a, controlling a pipeline network to supply water to the single-side high-pressure nozzles in a centralized manner, controlling the single-side high-pressure nozzles closest to a fire source area and the single-side high-pressure nozzles closest to the fire field area, and extinguishing the fire at the position of the fire source;
s3.2b, when the surface temperature of the object in the fire source area is 30-100 ℃, controlling a single-side high-pressure spray head closest to the fire field area to extinguish the fire at the boundary of the fire field area;
s3.2c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.3, the fire is great, the fire source spreads to the preferential diffusion prevention of bridge floor both sides and puts out a fire:
s3.3a, controlling high-pressure spray heads on two sides closest to a fire scene area to extinguish the fire of the boundary of the fire scene area, and forming a large amount of water vapor on the boundary of the fire scene area to achieve the effects of isolating oxygen and preventing the fire scene area from being enlarged;
s3.3b, controlling high-pressure spray heads at two sides closest to a fire source area to extinguish the fire at the fire source position;
s3.3c, executing S3.1 until the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1 m;
s3.4, if the fire is strong and the fire source is continuously uncontrollable, the fire is preferentially prevented from diffusing and extinguishes, and the fire exceeds the fire extinguishing capability of the fire extinguishing device, S3.3 is executed, and the remote operator calls a fire alarm command center at the same time;
s4, finishing fire extinguishing;
and S5, cleaning the fire scene by maintenance personnel, and continuously monitoring by the sensing control unit.
According to the fire monitoring and extinguishing method, real-time monitoring is carried out on the environment of the bridge surface of the stay cable through the sensing control unit, specifically, an alarm signal is sent out through the MCU, the MCU analyzes image data in the infrared double-vision thermal imaging module, the fire field area and the fire source area with the highest temperature are determined, the MCU controls the extinguishing device to extinguish fire, and therefore early warning and fire extinguishing of fire are achieved, the anti-interference capacity is strong, the space applicability is strong, and real-time monitoring and rapid fire extinguishing are more facilitated for fire disasters occurring on the bridge surface of the stay cable.
The sensing control unit in the step S1 includes a sensing module, an MCU, and a wireless data transmission module; the sensing module comprises an infrared double-vision thermal imaging module and a panoramic camera module; the MCU is connected with the sensing module, the fire extinguishing device and the power supply and interacts with a remote operator through the wireless data transmission module.
The fire extinguishing device in the step S2 comprises a bridge tower and a pipeline network, wherein a bridge body is fixed on the bridge tower, two sides of the bridge tower are connected with the bridge body through stay cables, stay cable sleeves are sleeved on the stay cables, a spraying mechanism is arranged on the stay cable sleeves, a partition plate is fixed inside the bridge tower, the inside of the bridge tower is divided into an installation bin and a lifting bin by the partition plate, the installation bin and the lifting bin are respectively located on the upper side and the lower side of the partition plate, a lifting mechanism and a water pumping mechanism are arranged inside the lifting bin, the pipeline network comprises a main water pipe and a plurality of branch water pipes, the main water pipe is located inside the installation bin, and the branch water pipes are located inside the stay cable sleeves.
The working principle of the invention is as follows: when a fire disaster occurs on the cable-stayed bridge, and the spraying mechanism identifies the occurrence of the fire disaster, the lifting mechanism lowers the water pumping mechanism into water, the water pumping mechanism pumps the river water away from the main path water pipe, then the main path water pipe conveys the river water to the branch water pipes, the branch water pipes convey the river water to the spraying mechanism, and the spraying mechanism sprays the river water to the occurrence of the fire disaster, so that the fire disaster can be quickly extinguished.
Airtight chamber and pipeline chamber have been seted up to suspension cable sheathed tube inside, and the branch road water pipe is located the inside in pipeline chamber, and pipeline chamber and installation storehouse intercommunication, and the suspension cable is located the inside in airtight chamber.
By adopting the structure, the stay cable is protected in a closed manner by the closed cavity, and the pipeline cavity provides an installation position for the branch water pipe.
The spraying mechanism comprises a rack and a plurality of mounting boxes, the rack is fixed on the side surface of a stay cable sleeve, an anti-drop plate is fixed on the side surface of the mounting box, a lifting groove is formed in the side surface of the mounting box, a rotating motor is fixed inside the mounting box, a driving gear and a driving bevel gear are fixed on an output shaft of the rotating motor, the driving bevel gear is positioned above the driving gear, a quick coupling is arranged at the bottom of the mounting box, the quick coupling is connected with a branch water pipe through a spring water pipe, a high-pressure nozzle is connected to the quick coupling through a metal pipeline, the high-pressure nozzle is positioned above the mounting box, a driven gear is fixed on the metal pipeline, the driven gear is meshed with the driving gear, an electric push rod is fixed on the inner side wall of the mounting box, a connecting shaft block is fixed below the electric push rod, a transmission shaft is rotatably arranged inside the connecting shaft block, and is slidably arranged inside the lifting groove, one end of the transmission shaft is fixed with a driven bevel gear which can be meshed with the driving bevel gear, the other end of the transmission shaft is fixed with a traveling gear, and the traveling gear is meshed with the rack.
By adopting the structure, when the infrared double-vision thermal imaging module identifies that a fire disaster happens to a stayed cable bridge deck (the width of the inclined inhaul cable bridge deck is about 20 meters generally), an electric push rod in the fire disaster adjacent to the installation box is started, the electric push rod drives the connecting shaft block to move, the connecting shaft block drives the transmission shaft to descend, the transmission shaft is used for meshing the driven bevel gear with the driving bevel gear so as to enable the installation box to ascend, then, the rotating motor drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear to rotate, the transmission shaft drives the traveling gear to rotate on the rack so as to drive the installation box to move, the installation box drives the high-pressure spray head to move to a fire disaster occurrence position, then, the electric push rod drives the connecting shaft block to move, the connecting shaft block drives the transmission shaft to ascend, and the driven bevel gear is separated from the driving bevel gear, thereby make the install bin descend, put out a fire to the conflagration, a plurality of high pressure shower nozzles assemble and spray, can effectively increase the speed of putting out a fire.
The installation points of the high-pressure spray heads are all located on the same horizontal line, and the installation horizontal line of the high-pressure spray heads is parallel to the graduation line of the rack.
By adopting the structure, the high-pressure spray heads are positioned on the same horizontal line, so that the high-pressure spray heads can be conveniently adjusted to spray on the fire.
The main road water pipes are provided with control valves, and communicated pipes are connected between adjacent main road water pipes.
Structure more than adopting, the control valve can be closed main road water pipe to cut off the water supply of main road water pipe and branch road water pipe, conveniently carry out the later maintenance to main road water pipe, and through the cooperation of control valve and closed pipe, can improve the water supply capacity to unilateral main road water pipe.
The water pumping mechanism comprises a lifting box, the lifting box is arranged inside the lifting bin, filter screens are arranged on the side faces of the lifting box, a water pumping pump is fixed inside the lifting box, a water outlet pipe is arranged on the side face of the water pumping pump and penetrates through the lifting box, the tail end of the water outlet pipe is located above the lifting box, and the tail end of the water outlet pipe is connected with a main water pipe through a spring hose.
By adopting the structure, the filter screen filters water, then the water suction pump pumps the water into the water outlet pipe, and the water outlet pipe is conveyed to the interior of the main water pipe through the spring hose.
The lifting mechanism comprises a mounting plate, the mounting plate is L-shaped and is fixed on the inner wall of the lifting bin, a lifting motor is fixed on the side face of the mounting plate, an output shaft of the lifting motor penetrates through the mounting plate, a sling shaft is fixed on the output shaft of the lifting motor, a sling is arranged on the sling shaft, and the end part of the sling is fixed above the lifting box.
By adopting the structure, the lifting motor drives the sling shaft to rotate through the output shaft, the sling shaft drives the sling to rotate, the sling drives the lifting box to lift, the height of the lifting box can be adjusted, and the lifting box is suitable for water levels in different periods, so that the situation that the river water can be taken out for fire extinguishment is guaranteed.
Compared with the prior art, the fire monitoring and extinguishing method applied to the cable-stayed bridge has the following advantages:
according to the fire monitoring and extinguishing method, real-time monitoring is carried out on the environment of the bridge surface of the stay cable through the sensing control unit, specifically, an alarm signal is sent out through the MCU, the MCU analyzes image data in the infrared double-vision thermal imaging module, the fire field area and the fire source area with the highest temperature are determined, the MCU controls the extinguishing device to extinguish fire, and therefore early warning and fire extinguishing of fire are achieved, the anti-interference capacity is strong, the space applicability is strong, and real-time monitoring and rapid fire extinguishing are more facilitated for fire disasters occurring on the bridge surface of the stay cable.
Drawings
FIG. 1 is a schematic diagram of the fire monitoring and extinguishing process of the present invention.
Fig. 2 is an overall architecture diagram of fire monitoring and suppression in the present invention.
Fig. 3 is a schematic perspective view of the fire extinguishing apparatus of the present invention.
Fig. 4 is a schematic perspective view of the spraying mechanism of the fire extinguishing apparatus.
Fig. 5 is a schematic view of the front internal structure of the spraying mechanism in the fire extinguishing apparatus.
Fig. 6 is an enlarged schematic view of a structure at a in fig. 3.
Fig. 7 is a schematic perspective view of a water pumping mechanism in the fire extinguishing apparatus.
Fig. 8 is a schematic perspective view of the piping network of the fire fighting device.
Fig. 9 is a schematic view of the internal structure of the rear side of the spraying mechanism in the fire extinguishing apparatus.
In the figure, 1, a bridge tower; 101. installing a bin; 102. a lifting bin; 103. a partition plate; 2. A bridge body; 3. a spraying mechanism; 301. installing a box; 302. a high pressure spray head; 303. a driven gear; 304. a driving bevel gear; 305. a quick coupling; 306. rotating the motor; 307. a driving gear; 308. an electric push rod; 309. a driven bevel gear; 310. a traveling gear; 311. A rack; 312. the anti-drop plate 313 and the transmission shaft; 4. a stay cable sleeve; 5. a lifting mechanism; 501. a sling; 502. mounting a plate; 503. a lifting motor; 504. a sling shaft; 6. a water pumping mechanism; 601. a filter screen; 602. a water outlet pipe; 603. a lifting box; 604. A water pump; 7. a network of pipes; 701. a branch water pipe; 702. a main road water pipe; 703. A communicating pipe.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1-2, the present embodiment provides a fire monitoring and extinguishing method applied to a cable-stayed bridge, the cable-stayed bridge is provided with a sensing control unit, and the fire monitoring and extinguishing method comprises the following steps:
s1, starting a power supply, and monitoring the bridge surface environment of the stay cable in real time through a sensing control unit;
s2, finding fire:
s2.1, the MCU sends out an alarm signal;
s2.2, analyzing by the MCU through image data in the infrared double-vision thermal imaging module;
s2.3, determining a fire scene area and a fire source area with the highest temperature;
s2.4, controlling a fire extinguishing device to extinguish fire by the MCU;
s3, fire extinguishing:
if the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are both greater than 8m, namely the fire is small and the fire source is in the middle of the bridge deck, executing S3.1;
if the maximum distance between the fire source area and the boundary of the fire field area is less than or equal to 1m, and the vertical distance between the maximum distance between the boundary of the fire field area and the single-side bridge tower is less than or equal to 8m, namely the fire is small and the fire source is positioned on the single side of the bridge deck, S3.2 is executed;
if the maximum distance between the fire source area and the boundary of the fire scene area is greater than 1m and less than or equal to 5m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are less than or equal to 8m, namely the situation that the fire is great and the fire source spreads to two sides of the bridge floor is performed S3.3;
if the maximum distance between the fire source area and the boundary of the fire field area is more than 5m, namely the fire is great and the fire source is continuously uncontrollable, S3.4 is executed;
s3.1, the fire is little, the prior fire source that the fire source is in the bridge floor middle part is put out a fire:
s3.1a, controlling two side high-pressure spray heads nearest to a fire source area and two side high-pressure spray heads nearest to the fire field area to extinguish fire at the position of the fire source;
s3.1b, when the surface temperature of an object in a fire source area is 30-100 ℃, controlling high-pressure spray heads on two sides closest to the fire scene area to extinguish fire on the boundary of the fire scene area;
s3.1c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.2, the fire is little, the fire source is in the preferential fire source of bridge floor unilateral and puts out a fire:
s3.2a, controlling a pipeline network to supply water to the single-side high-pressure nozzles in a centralized manner, controlling the single-side high-pressure nozzles closest to a fire source area and the single-side high-pressure nozzles closest to the fire field area, and extinguishing the fire at the position of the fire source;
s3.2b, when the surface temperature of the object in the fire source area is 30-100 ℃, controlling a single-side high-pressure spray head closest to the fire field area to extinguish the fire at the boundary of the fire field area;
s3.2c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.3, the fire is great, the fire source spreads to the preferential diffusion prevention of bridge floor both sides and puts out a fire:
s3.3a, controlling high-pressure spray heads on two sides closest to a fire scene area to extinguish the fire of the boundary of the fire scene area, and forming a large amount of water vapor on the boundary of the fire scene area to achieve the effects of isolating oxygen and preventing the fire scene area from being enlarged;
s3.3b, controlling high-pressure spray heads at two sides closest to a fire source area to extinguish the fire at the fire source position;
s3.3c, executing S3.1 until the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1 m;
s3.4, if the fire is strong and the fire source is continuously uncontrollable, the fire is preferentially prevented from diffusing and extinguishes, and the fire exceeds the fire extinguishing capability of the fire extinguishing device, S3.3 is executed, and the remote operator calls a fire alarm command center at the same time;
s4, finishing fire extinguishing;
and S5, cleaning the fire scene by maintenance personnel, and continuously monitoring by the sensing control unit.
According to the fire monitoring and extinguishing method, real-time monitoring is carried out on the environment of the bridge surface of the stay cable through the sensing control unit, specifically, an alarm signal is sent out through the MCU, the MCU analyzes image data in the infrared double-vision thermal imaging module, the fire field area and the fire source area with the highest temperature are determined, the MCU controls the extinguishing device to extinguish fire, and therefore early warning and fire extinguishing of fire are achieved, the anti-interference capacity is strong, the space applicability is strong, and real-time monitoring and rapid fire extinguishing are more facilitated for fire disasters occurring on the bridge surface of the stay cable.
The sensing control unit in the step S1 comprises a sensing module, an MCU and a wireless data transmission module; the sensing module comprises an infrared double-vision thermal imaging module and a panoramic camera module; the MCU is connected with the sensing module, the fire extinguishing device and the power supply and interacts with a remote operator through the wireless data transmission module.
As shown in fig. 3 to 9, the fire extinguishing apparatus in step S2 includes a bridge tower 1 and a pipeline network 7, a bridge body 2 is fixed on the bridge tower 1, two sides of the bridge tower 1 are connected to the bridge body 2 through stay cables, the stay cables are sleeved with stay cable sleeves 4, spraying mechanisms 3 are provided on the stay cable sleeves 4, a partition plate 103 is fixed inside the bridge tower 1, the inside of the bridge tower 1 is divided into an installation bin 101 and a lifting bin 102 by the partition plate 103, the installation bin 101 and the lifting bin 102 are respectively located at upper and lower sides of the partition plate 103, a lifting mechanism 5 and a pumping mechanism 6 are provided inside the lifting bin 102, the pipeline network 7 includes a main water pipe 702 and a plurality of branch water pipes 701, the main water pipe 702 is located inside the installation bin 101, and the branch water pipes 701 are located inside the stay cable sleeves 4.
The working principle of the fire extinguishing device is as follows: when the infrared double vision thermal imaging module identifies that a fire disaster occurs on an inclined cable bridge floor (the width of the cable bridge floor is generally about 20 meters), an electric push rod 308 in the installation box 301 adjacent to the fire disaster is started, the electric push rod 308 drives a connecting shaft block to move, the connecting shaft block drives a transmission shaft 312 to descend, the transmission shaft 312 is used for meshing a driven bevel gear 309 with a driving bevel gear 304, so that the installation box 301 ascends, then a rotating motor 306 is used for driving the driving bevel gear 304 to rotate, the driving bevel gear 304 drives the driven bevel gear 309 to rotate, the driven bevel gear 309 drives the transmission shaft 312 to rotate, the transmission shaft 312 drives a traveling gear 310 to rotate, the traveling gear 310 rotates on a rack 311, so that the installation box 301 is driven to move, the installation box 301 drives a high-pressure nozzle 302 to move to a fire disaster place, and then the lifting motor 503 drives a cable lifting shaft 504 to rotate through an output shaft, the sling shaft 504 drives the sling 501 to rotate, the sling 501 drives the lifting box 603 to lift, the lifting box 603 can adjust the height, thereby the lifting box 603 is placed in river water, the filter screen 601 filters the water, then, the water pump 604 pumps the water into the water outlet pipe 602, the water outlet pipe 602 is conveyed to the interior of the main water pipe 702 through a spring hose, then, the main water pipe 702 conveys a plurality of branch water pipes 701 to the high-pressure spray heads 302, then, the electric push rod 308 drives the connecting shaft block to move, the connecting shaft block drives the transmission shaft 312 to ascend, the transmission shaft 312 separates the driven bevel gear 309 from the driving bevel gear 304, thereby the installation box 301 descends, extinguishes the fire occurrence places, the plurality of high-pressure spray heads 302 converge and spray, and accordingly, extinguishes the fire occurrence places quickly.
Airtight cavity and pipeline cavity have been seted up to suspension cable sleeve 4's inside, and branch road water pipe 701 is located the inside in pipeline cavity, and pipeline cavity and installation storehouse 101 intercommunication, and the suspension cable is located the inside in airtight cavity.
The closed cavity performs closed protection on the stay cable, and the pipeline cavity provides an installation position for the branch water pipe 701.
The spraying mechanism 3 comprises a rack 311 and a plurality of installation boxes 301, the rack 311 is fixed on the side surface of the stay cable sleeve 4, an anti-dropping plate 312 is fixed on the side surface of the installation box 301, a lifting groove is formed on the side surface of the installation box 301, a rotating motor 306 is fixed inside the installation box 301, a driving gear 307 and a driving bevel gear 304 are fixed on an output shaft of the rotating motor 306, the driving bevel gear 304 is positioned above the driving gear 307, a quick connector is arranged at the bottom of the installation box 301 and is connected with a branch water pipe 701 through a spring water pipe, a high-pressure spray head 302 is connected on the quick connector through a metal pipeline, the high-pressure spray head 302 is positioned above the installation box 301, a driven gear 303 is fixed on the metal pipeline, the driven gear 303 is meshed with the driving gear 307, an electric push rod 308 is fixed on the inner side wall of the installation box 301, and a connecting block is fixed below the electric push rod 308, a transmission shaft 312 is rotatably arranged inside the connecting shaft block, the transmission shaft 312 is slidably arranged inside the lifting groove, a driven bevel gear 309 is fixed at one end of the transmission shaft 312, the driven bevel gear 309 can be meshed with the driving bevel gear 304, a traveling gear 310 is fixed at the other end of the transmission shaft 312, the traveling gear 310 is meshed with a rack 311, and an infrared temperature sensor is arranged below the installation box 301.
When the infrared double vision thermal imaging module identifies that a fire disaster occurs on a stayed cable bridge floor (the width of the stayed cable bridge floor is generally about 20 meters), an electric push rod 308 in the installation box 301 adjacent to the fire disaster is started, the electric push rod 308 drives a connecting shaft block to move, the connecting shaft block drives a transmission shaft 312 to descend, the transmission shaft 312 meshes a driven bevel gear 309 with a driving bevel gear 304, so that the installation box 301 ascends, then a rotating motor 306 drives the driving bevel gear 304 to rotate, the driving bevel gear 304 drives the driven bevel gear 309 to rotate, the driven bevel gear 309 drives the transmission shaft 312 to rotate, the transmission shaft 312 drives a traveling gear 310 to rotate, the traveling gear 310 rotates on a rack 311, so that the installation box 301 is driven to move, the installation box 301 drives a high-pressure nozzle 302 to move to a fire disaster place, then the electric push rod 308 drives the connecting shaft block to move, and the connecting shaft block drives the transmission shaft 312 to ascend, the transmission shaft 312 separates the driven bevel gear 309 from the driving bevel gear 304, so that the installation box 301 descends to extinguish fire, and the plurality of high-pressure spray nozzles 302 converge and spray, thereby effectively increasing the speed of extinguishing fire.
The installation points of the high-pressure spray heads 302 are all located on the same horizontal line, and the installation horizontal line of the high-pressure spray heads 302 is parallel to the graduation line of the rack 311.
The high-pressure spray nozzles 302 are positioned on the same horizontal line, so that the high-pressure spray nozzles 302 can be adjusted conveniently to spray on the fire.
The main water pipes 702 are provided with control valves, and a communicating pipe 703 is connected between adjacent main water pipes 702.
The control valve can be closed main water pipe 702 to cut off the water supply of main water pipe 702 and branch water pipe 701, conveniently carry out the later maintenance to main water pipe 702, and through the cooperation of control valve and closed pipe 703, can improve the water supply capacity to unilateral main water pipe 702.
The water pumping mechanism 6 comprises a lifting box 603, the lifting box 603 is arranged inside the lifting bin 102, filter screens 601 are arranged on the side surfaces of the lifting box 603, a water pump 604 is fixed inside the lifting box 603, a water outlet pipe 602 is arranged on the side surface of the water pump 604, the water outlet pipe 602 penetrates through the lifting box 603, the tail end of the water outlet pipe 602 is located above the lifting box 603, and the tail end of the water outlet pipe 602 is connected with a main water pipe 702 through a spring hose.
The filter screen 601 filters the water, and then the water pump 604 pumps the water into the water outlet pipe 602, and the water outlet pipe 602 is transported to the interior of the main water pipe 702 through the spring hose.
The lifting mechanism 5 comprises a mounting plate 502, the mounting plate 502 is L-shaped, the mounting plate 502 is fixed on the inner wall of the lifting bin 102, a lifting motor 503 is fixed on the side surface of the mounting plate 502, an output shaft of the lifting motor 503 penetrates through the mounting plate 502, a sling shaft 504 is fixed on the output shaft of the lifting motor 503, a sling 501 is arranged on the sling shaft 504, and the end of the sling 501 is fixed above the lifting bin 603.
Lifting motor 503 passes through the output shaft and drives hoist cable axle 504 and rotate, and hoist cable axle 504 drives hoist cable 501 and rotates, and hoist cable 501 drives lifting box 603 and goes up and down, and lifting box 603 can the height-adjusting, is applicable to the water level in different periods to the assurance can be taken out from the river and put out a fire.
In conclusion, the spraying mechanism 3 is matched with the traveling gear 310 by the rack 312, and can drive the high-pressure spray nozzle 302 to move to spray the fire source in a centralized manner, so that the fire accident occurring on the cable-stayed bridge can be quickly extinguished; the water pumping mechanism 6 adopts the matching of the filter screen 601 and the water pump 604, so that the pipeline can be prevented from being blocked when river water is pumped, and the fault rate is reduced; the lifting mechanism 5 is matched with a lifting motor 503 and a lifting rope 504, and can lift the lifting box 603, so that the lifting mechanism is suitable for different water levels, and avoids the situation that river water cannot be pumped for extinguishment due to the reduction of the water level; pipeline network 7 adopts main water pipe 702 and branch road water pipe 701 cooperation, can carry spray mechanism 3 with water fast to realize the multiple spot and put out a fire, improved fire extinguishing efficiency.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A fire monitoring and extinguishing method applied to a cable-stayed bridge is characterized by comprising the following steps:
s1, starting a power supply, and monitoring the bridge surface environment of the stay cable in real time through a sensing control unit;
s2, finding fire:
s2.1, the MCU sends out an alarm signal;
s2.2, analyzing by the MCU through image data in the infrared double-vision thermal imaging module;
s2.3, determining a fire scene area and a fire source area with the highest temperature;
s2.4, controlling a fire extinguishing device to extinguish fire by the MCU;
s3, fire extinguishing:
if the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are both greater than 8m, namely the fire is small and the fire source is in the middle of the bridge deck, executing S3.1;
if the maximum distance between the fire source area and the boundary of the fire field area is less than or equal to 1m, and the vertical distance between the maximum distance between the boundary of the fire field area and the single-side bridge tower is less than or equal to 8m, namely the fire is small and the fire source is positioned on the single side of the bridge deck, S3.2 is executed;
if the maximum distance between the fire source area and the boundary of the fire scene area is greater than 1m and less than or equal to 5m, and the vertical distances between the maximum distance between the boundary of the fire scene area and the bridge towers at two sides are less than or equal to 8m, namely the situation that the fire is great and the fire source spreads to two sides of the bridge floor is performed S3.3;
if the maximum distance between the fire source area and the boundary of the fire field area is more than 5m, namely the fire is great and the fire source is continuously uncontrollable, S3.4 is executed;
s3.1, the fire is little, the prior fire source that the fire source is in the bridge floor middle part is put out a fire:
s3.1a, controlling two side high-pressure spray heads nearest to a fire source area and two side high-pressure spray heads nearest to the fire field area to extinguish fire at the position of the fire source;
s3.1b, when the surface temperature of an object in a fire source area is 30-100 ℃, controlling high-pressure spray heads on two sides closest to the fire scene area to extinguish fire on the boundary of the fire scene area;
s3.1c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.2, the fire is little, the fire source is in the preferential fire source of bridge floor unilateral and puts out a fire:
s3.2a, controlling a pipeline network to supply water to the single-side high-pressure nozzles in a centralized manner, controlling the single-side high-pressure nozzles closest to a fire source area and the single-side high-pressure nozzles closest to the fire field area, and extinguishing the fire at the position of the fire source;
s3.2b, when the surface temperature of the object in the fire source area is 30-100 ℃, controlling a single-side high-pressure spray head closest to the fire field area to extinguish the fire at the boundary of the fire field area;
s3.2c, when the surface temperature of the object in the whole fire scene area is reduced to normal temperature, stopping extinguishing the fire in the area;
s3.3, the fire is great, the fire source spreads to the preferential diffusion prevention of bridge floor both sides and puts out a fire:
s3.3a, controlling high-pressure spray heads at two sides nearest to a fire scene area to extinguish fire at the boundary of the fire scene area, and forming a large amount of water vapor at the boundary of the fire scene area to achieve the effects of isolating oxygen and preventing the fire scene area from being enlarged;
s3.3b, controlling high-pressure spray heads at two sides closest to a fire source area to extinguish the fire at the position of the fire source;
s3.3c, executing S3.1 until the maximum distance between the fire source area and the boundary of the fire scene area is less than or equal to 1 m;
s3.4, if the fire is strong and the fire source is continuously uncontrollable, the fire is preferentially prevented from diffusing and extinguishes, and the fire exceeds the fire extinguishing capability of the fire extinguishing device, S3.3 is executed, and the remote operator calls a fire alarm command center at the same time;
s4, finishing fire extinguishing;
s5, cleaning the fire scene by maintainers, and continuously monitoring by the sensing control unit;
the fire extinguishing device in the step S2 comprises a bridge tower and a pipeline network, wherein the bridge tower is fixedly provided with a bridge body, two sides of the bridge tower are connected with the bridge body through stay cables, the stay cables are sleeved with stay cable sleeves, the stay cable sleeves are provided with spraying mechanisms, a partition plate is fixed in the bridge tower and divides the interior of the bridge tower into an installation cabin and a lifting cabin, the installation cabin and the lifting cabin are respectively positioned on the upper side and the lower side of the partition plate, the lifting cabin is internally provided with a lifting mechanism and a water pumping mechanism, the pipeline network comprises a main water pipe and a plurality of branch water pipes, the main water pipe is positioned in the installation cabin, and the branch water pipes are positioned in the stay cable sleeves;
the spraying mechanism comprises a rack and a plurality of mounting boxes, the rack is fixed on the side surface of a stay cable sleeve, an anti-drop plate is fixed on the side surface of the mounting box, a lifting groove is formed in the side surface of the mounting box, a rotating motor is fixed inside the mounting box, a driving gear and a driving bevel gear are fixed on an output shaft of the rotating motor, the driving bevel gear is positioned above the driving gear, a quick coupling is arranged at the bottom of the mounting box, the quick coupling is connected with a branch water pipe through a spring water pipe, a high-pressure nozzle is connected onto the quick coupling through a metal pipeline, the high-pressure nozzle is positioned above the mounting box, a driven gear is fixed on the metal pipeline and meshed with the driving gear, an electric push rod is fixed on the inner side wall of the mounting box, a connecting shaft block is fixed below the electric push rod, a transmission shaft is rotatably arranged inside the connecting shaft block, the transmission shaft is slidably arranged inside the lifting groove, and a driven bevel gear is fixed at one end of the transmission shaft, the driven bevel gear can be meshed with the driving bevel gear, and the other end of the transmission shaft is fixedly provided with a traveling gear which is meshed with the rack.
2. The method for fire monitoring and extinguishing a cable-stayed bridge according to claim 1, wherein the sensing control unit of the step S1 includes a sensing module, an MCU and a wireless data transmission module; the sensing module comprises an infrared double-vision thermal imaging module and a panoramic camera module; the MCU is connected with the sensing module, the fire extinguishing device and the power supply and interacts with a remote operator through the wireless data transmission module.
3. The method as claimed in claim 1, wherein the stay cable sleeve has a closed cavity and a pipe cavity therein, the branch water pipe is located inside the pipe cavity, the pipe cavity is communicated with the installation chamber, and the stay cable is located inside the closed cavity.
4. A fire monitoring and extinguishing method applied to a cable-stayed bridge according to claim 1, characterized in that the installation points of the plurality of high-pressure spray heads are all located on the same horizontal line, and the installation horizontal line of the high-pressure spray heads is parallel to the graduation line of the rack.
5. A fire monitoring and extinguishing method applied to a cable-stayed bridge according to claim 1, wherein a control valve is provided on the main water pipes, and a communicating pipe is connected between adjacent main water pipes.
6. A fire monitoring and extinguishing method applied to a cable-stayed bridge according to claim 1, characterized in that the water pumping mechanism comprises a lifting box, the lifting box is arranged inside a lifting bin, filter screens are arranged on the side surfaces of the lifting box, a water pump is fixed inside the lifting box, a water outlet pipe is arranged on the side surface of the water pump and penetrates through the lifting box, the tail end of the water outlet pipe is positioned above the lifting box, and the tail end of the water outlet pipe is connected with a main pipeline water pipe through a spring hose.
7. A fire monitoring and extinguishing method applied to a cable-stayed bridge according to claim 1, characterized in that the lifting mechanism comprises a mounting plate, the mounting plate is L-shaped, the mounting plate is fixed on the inner wall of the lifting bin, a lifting motor is fixed on the side surface of the mounting plate, the output shaft of the lifting motor penetrates through the mounting plate, a lifting cable shaft is fixed on the output shaft of the lifting motor, a lifting cable is arranged on the lifting cable shaft, and the end part of the lifting cable is fixed above the lifting bin.
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| CN202010738664.3A CN111905315B (en) | 2020-07-28 | 2020-07-28 | Fire monitoring and fire extinguishing method applied to cable-stayed bridge |
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| CN101673319A (en) * | 2008-09-12 | 2010-03-17 | 上海宝冶工程技术有限公司 | Method for assessing steel structural building after fire hazard |
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| CN209967484U (en) * | 2019-04-30 | 2020-01-21 | 广州大学 | Fire fighting system for long-span bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100761235B1 (en) * | 2002-01-22 | 2007-10-04 | 노드슨 코포레이션 | Method and apparatus for detecting a liquid spray pattern |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673319A (en) * | 2008-09-12 | 2010-03-17 | 上海宝冶工程技术有限公司 | Method for assessing steel structural building after fire hazard |
| CN102467804A (en) * | 2010-11-19 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Security sensing system for fire disaster and method thereof |
| CN209967484U (en) * | 2019-04-30 | 2020-01-21 | 广州大学 | Fire fighting system for long-span bridge |
| CN111008494A (en) * | 2019-11-30 | 2020-04-14 | 华南理工大学 | Target pipeline dynamic thermal failure analysis method under parallel pipeline jet fire scene |
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Inventor after: Mu Juan Inventor after: Zhou Manli Inventor before: Zhou Manli |
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Address after: 510000 No. 13, Jiaotong Chung East Street, Caixin Road, Lanhe Town, Nansha District, Guangzhou City, Guangdong Province Applicant after: Zhou Manli Address before: No. 200, Chuangye Road, Feihua County, Hefei City, Anhui Province Applicant before: Zhou Manli |
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