CN114159711A - Fire monitoring and fire extinguishing and smoke discharging system for power transmission steel box girder - Google Patents
Fire monitoring and fire extinguishing and smoke discharging system for power transmission steel box girder Download PDFInfo
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- CN114159711A CN114159711A CN202111384107.7A CN202111384107A CN114159711A CN 114159711 A CN114159711 A CN 114159711A CN 202111384107 A CN202111384107 A CN 202111384107A CN 114159711 A CN114159711 A CN 114159711A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/24—Operating or controlling mechanisms
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
- F24F11/34—Responding to malfunctions or emergencies to fire, excessive heat or smoke by opening air passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- Business, Economics & Management (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
A fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder comprises: the fire extinguishing system comprises a processor, a fire monitoring module, a suffocation fire extinguishing module and a ventilation and smoke exhausting module, wherein the processor comprises an operation and maintenance algorithm module, the operation and maintenance algorithm module is software and decision support for the whole process of fire monitoring and fire extinguishing and smoke discharging, the algorithm can automatically make decisions in the stages of fire detection, fire confirmation, fire extinguishing by suffocation and ventilation and smoke discharging, but the decision level is lower than that of the operation and maintenance personnel who have the authority to stop the algorithm execution at any stage and any time, and manually takes over the hardware of the fire monitoring and fire extinguishing smoke discharging module, the fire monitoring module consists of a smoke sensor, a temperature sensor and an oxygen concentration tester and is mainly used for detecting the temperature change and smoke monitoring before the fire happens to the cable in the box girder, the fire disaster detector is used for judging whether a fire disaster occurs or not, and has the characteristics of simple structure, larger operability space, better safety performance and the like.
Description
Technical Field
The invention relates to the technical field of fire monitoring and fire extinguishing and smoke discharging systems, in particular to a fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder.
Background
The internal environment of the sea-crossing steel box girder is closed, and the temperature is higher. When the cable works at high temperature for a long time, the problem that the insulating layer of the transmission cable is easy to be ignited at high temperature, particularly the joint part of the cable. In order to ensure the efficiency of the power transmission cable, the general power supply cables are intensively placed inside the sea-crossing steel box girder, so that the fire risk is further increased. In order to ensure the fireproof performance of the power transmission cable, the conventional fire extinguishing bomb scheme in the tunnel is used for reference for more cable fire prevention in the existing sea-crossing steel box girder, but the fire extinguishing bomb has more dead angles in the launching process; meanwhile, the cross-sea steel box girder bridge is built in a sectional assembly mode, the internal traffic condition is poor, an unmanned vehicle is difficult to operate, and further the movement of the fire extinguishing bomb robot is further hindered. In order to improve the fireproof capacity inside the cross-sea steel box girder, the invention provides the fire monitoring and fire extinguishing smoke discharging system inside the cross-sea steel box girder, which has more reliable performance, lower cost and easier maintenance.
Disclosure of Invention
In view of the defects in the prior art, the present invention aims to provide a fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder, which can realize the functions of monitoring the interior, extinguishing fire and discharging smoke, so as to solve the problems in the background art. The invention is as follows: a fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder comprises: the fire monitoring module consists of a smoke sensor, a temperature sensor and an oxygen concentration measuring instrument, is mainly used for detecting the temperature change and smoke monitoring at the early stage of fire occurrence of a cable in a box girder and judging whether the fire occurs and where the fire occurs and the real-time condition of the fire and the internal fire occurs, and uses an independent circuit for the smoke sensor and the temperature sensor, and transmitting the independent signal to a control computer, and rapidly positioning a specific fire starting place and judging the fire spreading speed by the computer through an operation and maintenance algorithm so as to judge the fire condition.
Preferably, the method comprises the following steps: and the operation and maintenance algorithm makes a preliminary judgment according to the fire condition and immediately sends an alarm to operation and maintenance personnel. The operation and maintenance algorithm at least comprises three fire processing modes, including an immediate automatic control suffocation fire extinguishing module, waiting for manual response of operation and maintenance personnel, or switching to an automatic control program after manual timeout of the operation and maintenance personnel.
Preferably, the method comprises the following steps: the fire extinguishing module that suffocates mainly includes automatic fire prevention airtight door, and this automatic fire prevention airtight door is by setting up manhole department in the multicavity structure that has arranged vertical and horizontal partition board inside transmission steel box girder, and after this module mainly used conflagration takes place, implement inclosed to the regional implementation of taking place of conflagration, the manhole that closes the scene of a fire place space promptly to form airtight space, let the intensity of a fire automatic extinguish after oxygen in this airtight space exhausts, automatic fire prevention airtight door contains the necessary subassembly of triplex at least: high temperature resistant fire-retardant door leaf, automatic actuating arm and fire-retardant airtight rubber door pocket, and the airtight door is control by temperature change, smoke control, automatically controlled assembled mode to the emergent effect of fire prevention airtight door when guaranteeing the circuit inefficacy.
Preferably, the method comprises the following steps: the ventilation and smoke exhaust module is composed of a box girder top smoke outlet and a smoke exhaust fan, and is mainly used for conducting fire smoke exhaust in a fire scene area after the fire is extinguished, so that toxic and harmful gas in the fire scene can be diluted as soon as possible, emergency repair personnel can conveniently enter the corresponding area for emergency repair, in the working process of the ventilation and smoke exhaust module, smoke, temperature and oxygen concentration information are continuously collected and fed back to the operation and maintenance algorithm module, the operation and maintenance algorithm module further judges the fire situation and then forms a fire situation brief report to the operation and maintenance personnel in real time, the operation and maintenance personnel make corresponding judgment according to algorithm feedback, the operation and maintenance algorithm confirms that the fire situation is controlled, and the oxygen content of the internal air is at a safe level, and the operation and maintenance personnel can arrange personnel to enter the scene for emergency repair.
The invention has the characteristics of simple structure, larger operability space, better safety performance and the like.
Drawings
Fig. 1 is a schematic view of an application part of the invention in a power transmission steel box girder.
Fig. 2 is a system decision flow diagram.
Detailed Description
The invention will be described in detail below with reference to the following figures: as shown in fig. 1-2, a fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder comprises: the fire monitoring system comprises a processor 4, a fire monitoring module 1, a suffocation fire extinguishing module 2 and a ventilation smoke discharging module 3, wherein the processor 4 comprises an operation and maintenance algorithm module which is software and decision support in the whole process of fire monitoring and fire extinguishing smoke discharging, the algorithm can automatically make decisions in the stages of fire detection, fire confirmation, suffocation fire extinguishing and ventilation smoke discharging, the decision level is lower than that of operation and maintenance personnel, the operation and maintenance personnel have the authority to stop algorithm execution at any stage at any moment and manually take over the hardware of the fire monitoring and fire extinguishing smoke discharging module, the fire monitoring module 1 comprises a smoke sensor, a temperature sensor and an oxygen concentration determinator, is mainly used for detecting temperature change and smoke monitoring in the early stage before fire occurrence of cables in a box girder and judging whether the fire occurs or not, and where the fire occurs and the real-time condition of the internal fire, and the smoke sensor and the temperature sensor use independent circuits, and transmitting the independent signal to a control computer, and rapidly positioning a specific fire starting place and judging the fire spreading speed by the computer through an operation and maintenance algorithm so as to judge the fire condition.
And the operation and maintenance algorithm makes a preliminary judgment according to the fire condition and immediately sends an alarm to operation and maintenance personnel. The operation and maintenance algorithm at least comprises three fire processing modes, including an immediate automatic control suffocation fire extinguishing module, waiting for manual response of operation and maintenance personnel, or switching to an automatic control program after manual timeout of the operation and maintenance personnel.
The fire extinguishing module 2 of suffocating mainly includes automatic fire prevention airtight door, and this automatic fire prevention airtight door is by setting up in the inside multicavity structure inner manhole department that arranges vertical and horizontal partition plate of transmission steel box girder, and after this module mainly used conflagration takes place, implements inclosed to the conflagration area of taking place, is the manhole that closes the scene of a fire place space promptly to form airtight space, let the intensity of a fire automatic extinguish after oxygen in this airtight space exhausts, automatic fire prevention airtight door contains the necessary subassembly of triplex at least: high temperature resistant fire-retardant door leaf, automatic actuating arm and fire-retardant airtight rubber door pocket, and the airtight door is control by temperature change, smoke control, automatically controlled assembled mode to the emergent effect of fire prevention airtight door when guaranteeing the circuit inefficacy.
The ventilation and smoke exhaust module 3 is composed of a box girder top smoke outlet and a smoke exhaust fan, and is mainly used for conducting fire smoke exhaust to a fire scene area after the fire is extinguished, so that toxic and harmful gas in the fire scene can be diluted as soon as possible, emergency repair personnel can conveniently enter the corresponding area for emergency repair, in the working process of the ventilation and smoke exhaust module 3, smoke, temperature and oxygen concentration information are continuously collected and fed back to the operation and maintenance algorithm module, the operation and maintenance algorithm module further judges the fire situation and then forms a fire situation brief report to the operation and maintenance personnel in real time, the operation and maintenance personnel make corresponding judgment according to algorithm feedback, the operation and maintenance algorithm confirms that the fire situation is controlled, and the oxygen content of the internal air is kept at a safe level, and the operation and maintenance personnel can arrange personnel to enter the scene for emergency repair.
The specific embodiment is as follows:
the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, it should be noted that the structure or configuration of the present invention, which is not specifically illustrated or defined, may be provided according to the related art.
As shown in fig. 1, the sea-crossing steel box girder bridge is provided with a vertical and horizontal partition plate, and a power transmission cable is arranged in a plurality of chambers divided by the vertical and horizontal partition plate.
The power transmission cable is easy to have fire hazard in an extreme environment with high-temperature sealing and unsmooth ventilation.
The whole system comprises 4 components: the fire monitoring system comprises a processor 4, a fire monitoring module 1, a suffocation fire extinguishing module 2 and a ventilation and smoke discharging module 3.
As shown in fig. 1, 1 represents a fire monitoring module in the system, including a smoke sensor, a temperature sensor and an oxygen concentration monitor. And 2, the suffocation fire extinguishing module in the system is a three-control automatic fireproof airtight door consisting of a control circuit, a fireproof door leaf, a fireproof airtight rubber ring and an automatic actuating arm, and the three-control automatic fireproof airtight door is in a temperature control, smoke control and electric control combined mode so as to ensure the emergency effect of the fireproof airtight door when the circuit fails. And 3, a ventilation and smoke exhaust module which consists of a smoke outlet at the top of the box girder and a smoke exhaust fan.
As shown in fig. 2, the working process of the system is mainly divided into four stages: monitoring stage, fire confirmation stage, suffocation fire extinguishing stage and ventilation smoke discharging stage.
In the monitoring stage, the main working module is a fire monitoring module, and the operation and maintenance algorithm is based on data measured by the smoke sensor, the temperature sensor and the inner cavity oxygen concentration monitor. And judging whether a fire occurs or not.
The training of the operation and maintenance algorithm needs to acquire data such as temperature, smoke concentration and the like of the steel box girder bridge, and the fire condition is accurately judged.
The operation and maintenance personnel have the highest authority at any stage of the operation of the system, and once the operation and maintenance personnel distrust the algorithm, the operation and maintenance personnel can take over the system hardware at any time to automatically control the whole process of detection or fire extinguishing. The embodiment focuses on the automatic monitoring and fire extinguishing process of the operation and maintenance algorithm.
The fire condition confirmation feedback of the operation and maintenance algorithm is directly transmitted to the operation and maintenance personnel, and the operation and maintenance personnel can select to stop the algorithm automatic suffocation fire extinguishing program to enter manual operation or select to trust the feedback of the operation and maintenance algorithm to enter a fire condition confirmation stage.
Once the fire is confirmed by warning, the operation and maintenance algorithm immediately gives an instruction to the suffocation fire extinguishing module, the automatic fireproof airtight door is closed immediately, and the automatic suffocation fire extinguishing stage is started.
In the suffocation fire extinguishing stage, the monitoring module and the operation and maintenance algorithm work in the whole process, and real-time smoke, temperature and oxygen concentration data are pushed to operation and maintenance personnel.
The monitoring system feeds back data to the operation and maintenance algorithm, after the algorithm confirms that the internal fire is extinguished, the algorithm gives an instruction to the ventilation and smoke exhaust module under the condition that operation and maintenance personnel do not interrupt operation, and the negative pressure smoke exhaust fan is started to enter a ventilation and smoke exhaust stage.
All modules of the ventilation and smoke exhaust stage keep working states, when smoke and temperature data collected by the monitoring module are lower than a threshold value and oxygen concentration data are higher than the threshold value, an algorithm prompts operation and maintenance personnel to arrange personnel to enter a field for rush repair, and the work of the fire extinguishing system is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (4)
1. A fire monitoring and fire extinguishing and smoke discharging system for a power transmission steel box girder comprises: the fire monitoring module consists of a smoke sensor, a temperature sensor and an oxygen concentration measuring instrument, is mainly used for detecting the temperature change and smoke monitoring at the early stage of fire occurrence of a cable in a box girder and judging whether the fire occurs and the real-time conditions of the fire and the internal fire, and the smoke sensor and the temperature sensor use independent circuits, and transmitting the independent signal to a control computer, and rapidly positioning a specific fire starting place and judging the fire spreading speed by the computer through an operation and maintenance algorithm so as to judge the fire condition.
2. A fire monitoring and fire extinguishing and smoke exhausting system for power transmission steel box girders according to claim 1, characterized in that the operation and maintenance algorithm makes a preliminary judgment according to the fire and immediately gives an alarm to the operation and maintenance personnel, the operation and maintenance algorithm comprises at least three fire handling modes, including an immediate automatic control suffocation extinguishing module, waiting for the manual response of the operation and maintenance personnel, or switching to an automatic control program after the manual timeout of the operation and maintenance personnel.
3. A fire monitoring and fire extinguishing and smoke exhausting system for steel box girders according to claim 1, wherein the suffocation fire extinguishing module mainly comprises an automatic fire-proof airtight door which is arranged at a manhole in a multi-cavity structure with longitudinal and transverse partition plates arranged inside the steel box girders, the module is mainly used for sealing a fire area after a fire occurs, namely, closing the manhole in a space where a fire scene is located to form an airtight space, so that the fire can be automatically extinguished after oxygen in the airtight space is exhausted, and the automatic fire-proof airtight door at least comprises three necessary components: high temperature resistant fire-retardant door leaf, automatic actuating arm and fire-retardant airtight rubber door pocket, and the airtight door is control by temperature change, smoke control, automatically controlled assembled mode to the emergent effect of fire prevention airtight door when guaranteeing the circuit inefficacy.
4. A fire monitoring and fire extinguishing and smoke exhausting system for electric transmission steel box beams according to claim 1, it is characterized in that the ventilation and smoke exhaust module consists of a box girder top smoke outlet and a smoke exhaust fan, the module is mainly used for performing fire smoke exhaust in a fire scene area after suffocation and fire extinguishment, so as to dilute the toxic and harmful gas in the interior as soon as possible, facilitate emergency repair personnel to enter corresponding areas for emergency rescue, in the working process of the ventilation and smoke exhaust module, the fire monitoring module works in the whole process, continuously collects smoke, temperature and oxygen concentration information and feeds the information back to the operation and maintenance algorithm module, the operation and maintenance algorithm module further judges the fire and then forms a fire briefing to operation and maintenance personnel in real time, the operation and maintenance personnel make corresponding judgment according to the algorithm feedback, when the operation and maintenance algorithm confirms that the fire is controlled, and after the oxygen content of the internal air is at a safe level, operation and maintenance personnel can arrange to enter the field for rush repair.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111384107.7A CN114159711A (en) | 2021-11-19 | 2021-11-19 | Fire monitoring and fire extinguishing and smoke discharging system for power transmission steel box girder |
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| CN202111384107.7A CN114159711A (en) | 2021-11-19 | 2021-11-19 | Fire monitoring and fire extinguishing and smoke discharging system for power transmission steel box girder |
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