CN109603035A - A kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system and its application method - Google Patents
A kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system and its application method Download PDFInfo
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- CN109603035A CN109603035A CN201811268308.9A CN201811268308A CN109603035A CN 109603035 A CN109603035 A CN 109603035A CN 201811268308 A CN201811268308 A CN 201811268308A CN 109603035 A CN109603035 A CN 109603035A
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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
- 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
Abstract
The invention discloses a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system and its application methods.This is divided into gas extinguishing system, cabinet inner part includes top exhaust fan, bottom exhaust fan, cabinet internal controller and signal sensor on fire with including cabinet inner part and cabinet outer portion outside cabinet；Signal sensor on fire can send the signal to cabinet internal controller and gas extinguishing system controller respectively.The system can make air reverse flow in cabinet body form negative pressure suppression fire spreading radiated to power distribution cabinet in the case where in-cabinet temperature is excessively high after receiving signal on fire, and be conducive to the quick diffusion of gas fire-extinguishing medium；Exhaust fan is closed after fire-suppressant gas medium discharges certain time-delay, makes to form relatively closed space in cabinet, realizes quick extinguishing；Gas extinguishing system is triggered by redundant signals, ensure that the reliability of whole system；Fire alarm signal is issued by monitoring system, related personnel can be notified to take appropriate measures in time.
Description
Technical field
The present invention relates to power distribution cabinet fire extinguishing system, in particular to a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system.
Background technique
Power distribution cabinet is the final stage device of distribution system, in addition to completing to distribute electric energy to next stage power load, can also be configured
The very big equipment of heat dissipation capacities such as some rectifier equipments, driving equipment, large-scale disconnecting link, contactor, cause distribution in-cabinet temperature excessively high.
The reasons such as aging, electrical equipment improper use, the short circuit of other loads or the overload of simultaneous route and component, cause to match
The risk that fire occurs in electric cabinet is very high.
Under normal circumstances, in order to make power distribution cabinet can satisfy the requirement of heat dissipation, air draft is typically provided at the top of power distribution cabinet
Fan, bottom are equipped with air inlet filtering mouth, but such be arranged in cabinet occurs to accelerate air circulation in the case where fire, leads to fire
Gesture expands rapidly.While on fire in cabinet, equipment may be charged still in cabinet, be existed centainly by the way of manual extinguishing
Risk, the smog on fire supervened include a large amount of poisonous and harmful particle, the difficulty of the manual extinguishing further increased
Degree.
The ring control cabinet of self-extinguishing common at present closes air inlet and exhaust outlet by mechanical device in fire extinguishing, provides
A kind of technical solution put out a fire in effective enclosure space.The technical solution, ground injustice causes cabinet body to deform at the scene
In the case of, there are the possibility of mechanical structure failure, in the case where exhaust outlet is equipped with exhaust fan, the installation of exhaust outlet closed plate by
To the limitation of mechanical structure.
It after power distribution cabinet is on fire, generally requires and reaches the intensity of a fire Rapid Expansion phase, trigger the fire report in the room where power distribution cabinet
Alert system, could issue sound and light alarm signal, this scheme is not especially important in equipment and power distribution cabinet centralized arrangement is being equipped with
Relatively common in the room of fire extinguishing system, this technical solution, which not only misses, is easiest to put out Initial Stage of Fire on fire, Er Qie
Smog is difficult to be dispersed into outside cabinet body in closed cabinet body, so that fire extinguishing system cannot be triggered, causes to compare huge economic loss.
Summary of the invention
In order to solve power distribution cabinet existing above problem in operation and generation on fire, the present invention provides a kind of power distribution cabinets
Counterflow negative quick and automatic fire extinguishing system, the angle of this system exhaust fan operating status at the top and bottom of change cabinet body,
On the one hand the air reverse flow in cabinet body can be made to form negative pressure, slow down the speed of fire spreading；On the other hand in negative pressure
Under effect, gas fire-extinguishing medium can reach rapidly fire location and put out a fire.At the same time, redundancy trigger signal guarantees system
Reliability, monitoring system can initial stage on fire issue sound and light alarm signal.
Technical scheme is as follows:
A kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system, including cabinet inner part and cabinet outer portion, outside the cabinet
Dividing includes gas extinguishing system, including the gas extinguishing system controller and extinguishing chemical bottle connected by extinguishing chemical transfer pipeline
Group；The cabinet inner part includes top exhaust fan, bottom exhaust fan, cabinet internal controller and signal sensor on fire；Signal on fire
Detector includes smoke detector and heat detector, can send the signal to cabinet internal controller and gas extinguishing system respectively
Controller.
Further, the top exhaust fan and bottom exhaust fan are mounted on the diagonally opposing corner position of power distribution cabinet side, equal band
Shutter and filter screen.
Further, the cabinet internal controller is connected with monitoring system, and monitoring system can export sound and light alarm signal.
Further, the gas extinguishing system controller can be communicated with cabinet internal controller, and cabinet internal controller is same
When receive temperature sensing controller sending high temperature signal and sense cigarette controller issue smoke-sensitive alarm signal when, to gas extinguishing system
Controller issues and signal.
Further, the gas extinguishing system in the detector signal and cabinet in signal sensor on fire to control
Device with signal as redundancy starting signal.
Further, the extinguishing chemical bottle group have can be manually opened mechanical emergency starter.
Further, the gas extinguishing system is connected with multiple power distribution cabinets by extinguishing chemical transfer pipeline, and extinguishing chemical is defeated
It send and is provided with selector valve on pipeline.
The application method of above-mentioned power distribution cabinet counterflow negative quick and automatic fire extinguishing system, in turn includes the following steps,
Temperature-sensitive alarm detector touching of the step 1. when distribution in-cabinet temperature height and setting value, in signal sensor on fire
Hair, while two-way high temperature signal is exported to cabinet internal controller and gas extinguishing system controller；
Step 2. cabinet internal controller judge it is whether on fire in power distribution cabinet,
If step 2.1 cabinet internal controller receives the sense that the smoke-sensitive alarm detector in signal sensor on fire issues simultaneously
Cigarette alarm signal is then judged as on fire in power distribution cabinet；Cabinet internal controller issues and signal conduct to gas extinguishing system controller
Signal on fire simultaneously closes off top exhaust fan and opens bottom exhaust fan；
If step 2.2 cabinet internal controller does not receive the sense cigarette of the sending of the smoke-sensitive alarm detector in signal sensor on fire
Alarm signal is then judged as not on fire in power distribution cabinet；Open top part exhaust fan simultaneously closes bottom exhaust fan, and hot-air is by pushing up at this time
The discharge of portion's exhaust fan, cold air are sucked by bottom exhaust fan, carry out air discharging and radiating；It is lower than setting value to distribution in-cabinet temperature, closes
Closing top exhaust fan terminates to radiate；
Step 3. gas extinguishing system controller receives the height of the sending of the temperature-sensitive alarm detector in signal sensor on fire
The signal on fire that the smoke-sensitive alarm signal one of both and cabinet internal controller that warm signal and smoke-sensitive alarm detector issue issue,
Or receiving the high temperature signal and smoke-sensitive alarm signal simultaneously, then gas extinguishing system controller is judged as in power distribution cabinet and rises
Fire；
Step 5. gas extinguishing system controller issues confirmation signal on fire to cabinet internal controller, then,
Step 5.1 cabinet internal controller controls bottom exhaust fan and opens, and top exhaust fan is out of service, at this time can air in cabinet
Adverse current can be formed from top to bottom, inhibit fire spreading using top flue gas；
Simultaneously, gas extinguishing system controller controls gas extinguishing system and discharges firing-fighting medium step 5.2；
The firing-fighting medium of step 6. gas extinguishing system release is rapidly filled up power distribution cabinet and is gone out due to the effect of negative pressure
Fire, cabinet internal controller control bottom exhaust fan and close.
Further, the cabinet internal controller is by after certain delay time t, closing bottom exhaust fan, when delay
Between t, calculation formula is as follows:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3).
The application method of above-mentioned power distribution cabinet counterflow negative quick and automatic fire extinguishing system, in turn includes the following steps,
Step 1. is triggered when with the smoke-sensitive alarm detector in signal sensor on fire, while exporting two-way smoke-sensitive alarm letter
Number to cabinet internal controller 3 and gas extinguishing system controller 5；
Step 2. gas extinguishing system controller 5 judge it is whether on fire in power distribution cabinet,
If step 2.1 gas extinguishing system controller 5 receives the temperature-sensitive alarm detection in signal sensor 4 on fire simultaneously
The high temperature signal that device issues, then be judged as on fire in power distribution cabinet；Gas extinguishing system controller 5 to cabinet internal controller 3 issue with
Signal is as confirmation signal on fire, while gas extinguishing system controller 5 controls gas extinguishing system and discharges firing-fighting medium；
If step 2.2 gas extinguishing system controller 5 does not receive the temperature-sensitive alarm detector in signal sensor on fire
The high temperature signal of sending, and do not receive the signal on fire of the sending of cabinet internal controller 3, then it is judged as not on fire in power distribution cabinet；
After step 3. cabinet internal controller 3 receives the confirmation signal on fire of the sending of gas extinguishing system controller 5, bottom is controlled
Exhaust fan 2 is opened, and top exhaust fan 1 is out of service, and meeting air can form adverse current from top to bottom in cabinet at this time, uses top flue gas
Inhibit fire spreading；
The firing-fighting medium of step 4. gas extinguishing system release is rapidly filled up power distribution cabinet and is gone out due to the effect of negative pressure
Fire, cabinet internal controller 3 are passed through after certain delay time t, closing bottom exhaust fan 2, delay time t, and calculation formula is as follows:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3)
The beneficial effects of the present invention are:
The present invention can radiate in the case where in-cabinet temperature is excessively high to power distribution cabinet, the temperature that radiator fan is opened
It can freely be set according to the actual situation；It can be after receiving signal on fire, in the feelings that signal logic is met the requirements
Under condition, air reverse flow in cabinet body is set to form negative pressure suppression fire spreading, and be conducive to the quick diffusion of gas fire-extinguishing medium；
Exhaust fan is closed after fire-suppressant gas medium discharges certain time-delay, makes to form relatively closed space in cabinet, is realized quick
Fire extinguishing；Gas extinguishing system is triggered by redundant signals, ensure that the reliability of whole system；Fire is issued by monitoring system
Alarm signal can notify related personnel to take appropriate measures in time.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is work flow diagram of the invention.
In figure: exhaust fan, the bottom 2- exhaust fan, 3- cabinet internal controller, 4- signal sensor on fire, 5- fire extinguishing system at the top of 1-
System controller, 6- extinguishing chemical bottle group, 7- monitoring system.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The technology of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1
As shown in Figure 1, present embodiments provide a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system point by cabinet and
The outer two parts composition of cabinet；In order to which the E class for putting out electric components is on fire, the part outside cabinet generally uses market purchasing, satisfaction
The gas extinguishing system of fire protection rule, the system need to be from tape controllers；The system is generally comprised to be connected by extinguishing chemical transfer pipeline
6 two parts of fire extinguishing system controller 5 and extinguishing chemical bottle group connect are equipped with check valve, safety relief on extinguishing chemical transfer pipeline
Device also needs to install selector valve if this gas extinguishing system is the combined distribution system for protecting multiple power distribution cabinets,
The quantity and capacity of extinguishing chemical bottle group 6 need under the premise of meeting specification, are determined according to the quantity of power distribution cabinet and volume；
Part in cabinet mainly includes cabinet internal controller 3, signal sensor on fire 4 and exhaust fan；Cabinet internal controller 3 is general
Using small PLC, position should be arranged in position comparatively safe in cabinet, and cabinet internal controller 3 is connected with monitoring system 7, can
The communication of cabinet internal controller 3 is received, and exports sound and light alarm signal；
Fire detectors include at least more than two different types of detectors, such as smoke detector, temperature sensing
Device.In general power distribution cabinet heat detector is as the first trigger signal, and heat detector is as the second trigger signal, two letters
Number simultaneously triggering may determine that occur cabinet in it is on fire.Signal sensor 4 on fire is other than alarm, it is also necessary to provide temperature in real time
Degree controls the working condition of exhaust fan for cabinet internal controller 3；The detector for providing real time temperature generally uses pt100, and pacifies
Near the serious component that generates heat, the detector for alarm generally uses the point type heat fire detector and point of fire-fighting
Type smoke fire detector；
Exhaust fan includes top exhaust fan 1 and bottom exhaust fan 3, and air draft wind direction is to arrange outside cabinet in cabinet, should be with shutter
And filter screen, installation site, it is normally at the diagonally opposing corner position of cabinet body side, forms good air duct, convenient for rapidly by cabinet
Interior air is replaced.
System of the present invention, the outer gas extinguishing system of cabinet by two independent detector signals as trigger signal,
One detector signal is plus cabinet internal controller 3 with signal as redundancy trigger signal；Cabinet internal controller 3 judges letter on fire
Number for temperature-sensitive and the sense independent alarm signal of cigarette two-way, temperature real-time in cabinet passes to cabinet internal controller 3, is used for by pt100
Judge whether to air discharging and radiating.The alarm signal of temperature-sensitive and smoke detector has two contacts, is delivered separately to cabinet internal control
The outer gas extinguishing system controller 5 of device 3 and cabinet processed；The installation of gas extinguishing system spray head is generally placed upon the top of cabinet body, and its
The equipment that the gas that should not around have an impact spurts.
As shown in Fig. 2, above-mentioned power distribution cabinet counterflow negative quick and automatic fire extinguishing system, in cabinet without it is on fire in the case where,
If the high temperature signal for the signal sensor on fire 4 that cabinet internal controller 3 receives, display in-cabinet temperature is more than that (this sets setting value
Definite value need to voluntarily calculate setting according to equipment power dissipation in cabinet), then the top unlatching of exhaust fan 1 is controlled by cabinet internal controller 3, bottom is arranged
Fan 2 remains turned-off, and hot-air is discharged by top exhaust outlet at this time, and cold air is sucked after filtering by bottom exhaust fan, cabinet
Internal portion has achieved the purpose that cooling.After temperature is fallen to a certain temperature, then closing top exhaust fan 1 terminates heat dissipation.Top
There is certain stagnant ring in the setting value that exhaust fan 1 opens and closes, exhaust fan is avoided frequently to start.
As shown in Fig. 2, above-mentioned power distribution cabinet counterflow negative quick and automatic fire extinguishing system, when occurring on fire in cabinet, according to
It is secondary to include the following steps:
Smoke-sensitive alarm detector triggering in step 1. signal sensor 4 on fire, while exporting two road feel cigarette signals on fire
To cabinet internal controller 3 and gas extinguishing system controller 5, this signal is passed to monitoring system by cabinet internal controller 3, is monitored at this time
There may be point of origins by visual alarm prompt relevant staff for system；
Temperature-sensitive alarm detector triggering in step 2. signal sensor 4 on fire, while two-way high temperature signal is exported to cabinet
Internal controller 3 and gas extinguishing system controller 5；
Step 3. cabinet internal controller 3 and 5 controller of gas extinguishing system receive the independent signal on fire of two-way, Huo Zheren
Meaning passes through the confirmation letter on fire of communication transfer all the way between signal and cabinet internal controller 3 on fire and gas extinguishing system controller 5
Number, logical AND judgement is carried out, is judged as in cabinet that generation is on fire；
Step 4. cabinet internal controller 3 controls bottom exhaust fan 2 and opens, and top exhaust fan 1 is out of service, at this time can be empty in cabinet
Gas can be formed from top to bottom adverse current, since top flue gas oxygen content is few, this portion gas flow downward can play it is certain
Inhibit the effect of fire spreading；
Simultaneously, gas extinguishing system receives heat alarm all the way and all the way smog alarm signal for step 5. and step 4
And signal, can be used as the trigger signal of gas extinguishing system, receive heat alarm all the way or all the way smog alarm believe
Number, and the trigger signal that can also be used as gas extinguishing system with signal of cabinet internal controller received, gas extinguishing system
Start to link according to fixed logic immediately after triggering, discharges firing-fighting medium.Due to gas extinguishing system controller 5, release
Gas fire-extinguishing medium density is larger, and since step 3.1 acts on simultaneously, also results in that top air pressure is lower to form negative pressure, just
The every nook and cranny to power distribution cabinet is rapidly full of in the firing-fighting medium of gas extinguishing system release.
Step 6. gas extinguishing system can be opened by mechanical emergency device, and should be able to issue sound and light alarm signal, be mentioned
Awake related personnel is putting out a fire.The unspecified part of gas extinguishing system is same as the prior art.
The firing-fighting medium of step 7. gas extinguishing system release is rapidly filled up power distribution cabinet and is gone out due to the effect of negative pressure
Fire, cabinet internal controller 3 are formed relatively close by after certain delay time t, closing bottom exhaust fan 2 in power distribution cabinet
Point of origin and oxygen are adequately isolated, put out a fire by the space closed, firing-fighting medium.Wherein delay time t, calculation formula is such as
Under:
Wherein D: cabinet body volume；S: exhaust fan wind sweeping area；V: exhaust outlet wind speed generally uses axial flow blower to arrange
Wind, then wind sweeping area is π r2, r is air draft port radius；β: safety coefficient (1.2~1.3).
The power distribution cabinet counterflow negative quick and automatic fire extinguishing system of the present embodiment by being in detector comprehensive descision power distribution cabinet
It is no on fire, confirm that the working condition of the controller control exhaust fan in rear power distribution cabinet on fire is converted to counterflow negative shape by radiating
State, and by redundant signals, triggering gas extinguishing system releases immediately fire-suppressant gas, achievees the purpose that quick extinguishing, simultaneously will
Signal on fire passes to monitoring system and issues alarm signal, notifies operator on duty at the first time.
Embodiment 2
A kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system is present embodiments provided, as shown in Fig. 2, including inside cabinet
Point and cabinet outer portion, the cabinet outer portion includes gas extinguishing system, and the gas including being connected by extinguishing chemical transfer pipeline goes out
Fiery system controller and extinguishing chemical bottle group；The cabinet inner part includes top exhaust fan, bottom exhaust fan, cabinet internal controller and rises
Fiery signal sensor；Signal sensor on fire includes smoke detector and heat detector, can send the signal to cabinet respectively
Internal controller and gas extinguishing system controller；
Exhaust fan is respectively set one in the upper and lower part of power distribution cabinet for gas in power distribution cabinet to be discharged to outside cabinet body
It is a；Cabinet internal controller be used for receive smoke detector and hygrosensor signal, control exhaust fan working condition and with
Monitoring system communication；Smoke detector and hygrosensor are used to monitor the flue dust and temperature in power distribution cabinet, and two signals are for comprehensive
Whether conjunction judges on fire in power distribution cabinet；
The top exhaust fan and bottom exhaust fan are mounted on the diagonally opposing corner position of power distribution cabinet side, band shutter and mistake
Strainer；The cabinet internal controller is connected with monitoring system, and monitoring system can export sound and light alarm signal；The extinction using gas system
System controller can be communicated with cabinet internal controller, cabinet internal controller simultaneously receive temperature sensing controller sending high temperature signal and
When feeling the smoke-sensitive alarm signal that cigarette controller issues, to the sending of gas extinguishing system controller and signal；The extinction using gas system
Unite using in signal sensor on fire a detector signal and cabinet internal controller with signal as redundancy starting signal；It is described
Extinguishing chemical bottle group has mechanical emergency starter that can be manually opened；The gas extinguishing system passes through extinguishing chemical delivery pipe
Road is connected with multiple power distribution cabinets, is provided with selector valve on extinguishing chemical transfer pipeline.
The present embodiment additionally provides the application method of above-mentioned power distribution cabinet counterflow negative quick and automatic fire extinguishing system, successively includes
Following steps,
Temperature-sensitive alarm detector touching of the step 1. when distribution in-cabinet temperature height and setting value, in signal sensor on fire
Hair, while two-way high temperature signal is exported to cabinet internal controller and gas extinguishing system controller；
Step 2. cabinet internal controller judge it is whether on fire in power distribution cabinet,
If step 2.1 cabinet internal controller receives the sense that the smoke-sensitive alarm detector in signal sensor on fire issues simultaneously
Cigarette alarm signal is then judged as on fire in power distribution cabinet；Cabinet internal controller issues and signal conduct to gas extinguishing system controller
Signal on fire simultaneously closes off top exhaust fan and opens bottom exhaust fan；
If step 2.2 cabinet internal controller does not receive the sense cigarette of the sending of the smoke-sensitive alarm detector in signal sensor on fire
Alarm signal is then judged as not on fire in power distribution cabinet；Open top part exhaust fan simultaneously closes bottom exhaust fan, and hot-air is by pushing up at this time
The discharge of portion's exhaust fan, cold air are sucked by bottom exhaust fan, carry out air discharging and radiating；It is lower than setting value to distribution in-cabinet temperature, closes
Closing top exhaust fan terminates to radiate；
Step 3. gas extinguishing system controller receives the height of the sending of the temperature-sensitive alarm detector in signal sensor on fire
The signal on fire that the smoke-sensitive alarm signal one of both and cabinet internal controller that warm signal and smoke-sensitive alarm detector issue issue,
Or receiving the high temperature signal and smoke-sensitive alarm signal simultaneously, then gas extinguishing system controller is judged as in power distribution cabinet and rises
Fire；
Step 5. gas extinguishing system controller issues confirmation signal on fire to cabinet internal controller, then,
Step 5.1 cabinet internal controller controls bottom exhaust fan and opens, and top exhaust fan is out of service, at this time can air in cabinet
Adverse current can be formed from top to bottom, inhibit fire spreading using top flue gas；
Simultaneously, gas extinguishing system controller controls gas extinguishing system and discharges firing-fighting medium step 5.2；Or gas goes out
Fiery system is opened by mechanical emergency device, and should be able to issue sound and light alarm signal, and related personnel is reminded to put out a fire；
The firing-fighting medium of step 6. gas extinguishing system release is rapidly filled up power distribution cabinet and is gone out due to the effect of negative pressure
Fire, cabinet internal controller are passed through after certain delay time t, closing bottom exhaust fan, delay time t, and calculation formula is as follows:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3)；Top
Portion's exhaust fan and bottom exhaust fan are usually axial flow blower, then wind sweeping area S is π r2, r is air draft port radius.
Embodiment 3
The present embodiment provides the power distribution cabinet counterflow negative quick and automatic fire extinguishing system on the basis of embodiment 2
Another application method, in turn includes the following steps,
Step 1. is triggered when with the smoke-sensitive alarm detector in signal sensor on fire, while exporting two-way smoke-sensitive alarm letter
Number to cabinet internal controller 3 and gas extinguishing system controller 5；
Step 2. gas extinguishing system controller 5 judge it is whether on fire in power distribution cabinet,
If step 2.1 gas extinguishing system controller 5 receives the temperature-sensitive alarm detection in signal sensor 4 on fire simultaneously
The high temperature signal that device issues, then be judged as on fire in power distribution cabinet；Gas extinguishing system controller 5 to cabinet internal controller 3 issue with
Signal is as confirmation signal on fire, while gas extinguishing system controller 5 controls gas extinguishing system and discharges firing-fighting medium；
If step 2.2 gas extinguishing system controller 5 does not receive the temperature-sensitive alarm detector in signal sensor on fire
The high temperature signal of sending, and do not receive the signal on fire of the sending of cabinet internal controller 3, then it is judged as not on fire in power distribution cabinet；
After step 3. cabinet internal controller 3 receives the confirmation signal on fire of the sending of gas extinguishing system controller 5, bottom is controlled
Exhaust fan 2 is opened, and top exhaust fan 1 is out of service, and meeting air can form adverse current from top to bottom in cabinet at this time, uses top flue gas
Inhibit fire spreading；
The firing-fighting medium of step 4. gas extinguishing system release is rapidly filled up power distribution cabinet and is gone out due to the effect of negative pressure
Fire, cabinet internal controller 3 are passed through after certain delay time t, closing bottom exhaust fan 2, delay time t, and calculation formula is as follows:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3)；Top
Portion's exhaust fan 1 and bottom exhaust fan 2 are usually axial flow blower, then wind sweeping area S is π r2, r is air draft port radius.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.It is if these modifications and variations are within the scope of the claims of the present invention and its equivalent technology, then of the invention
It is also intended to include these modifications and variations.
Claims (10)
1. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system, including cabinet inner part and cabinet outer portion, the cabinet outer portion
Including gas extinguishing system, gas extinguishing system includes the gas extinguishing system controller connected by extinguishing chemical transfer pipeline
(5) and extinguishing chemical bottle group (6), it is characterised in that: the cabinet inner part includes top exhaust fan (1), bottom exhaust fan (2), cabinet
Internal controller (3) and signal sensor on fire (4)；Signal sensor (4) on fire includes smoke detector and heat detector, energy
It is enough to send the signal to cabinet internal controller (3) and gas extinguishing system controller (5) respectively.
2. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as described in claim 1, it is characterised in that: the top
Exhaust fan (1) and bottom exhaust fan (2) are mounted on the diagonally opposing corner position of power distribution cabinet side, band shutter and filter screen.
3. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 1 or 2, it is characterised in that: described
Cabinet internal controller (3) is connected with monitoring system (7), and monitoring system (7) can export sound and light alarm signal.
4. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 1 or 2, it is characterised in that: described
Gas extinguishing system controller (5) can be communicated with cabinet internal controller (3), and cabinet internal controller (3) receives temperature-sensitive control simultaneously
When the smoke-sensitive alarm signal that the high temperature signal and sense cigarette controller that device processed issues issue, sent out to gas extinguishing system controller (5)
Out and signal.
5. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 4, it is characterised in that: the gas
Fire extinguishing system using in signal sensor on fire (4) a detector signal and cabinet internal controller (3) with signal as redundancy
Starting signal.
6. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 1 or 2, it is characterised in that: described
Extinguishing chemical bottle group (6) has mechanical emergency starter that can be manually opened.
7. a kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as described in claim 1, it is characterised in that: the gas
Fire extinguishing system is connected with multiple power distribution cabinets by extinguishing chemical transfer pipeline, is provided with selector valve on extinguishing chemical transfer pipeline.
8. a kind of application method of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 5, feature exist
In: it in turn includes the following steps,
When distribution in-cabinet temperature height and setting value, the temperature-sensitive alarm detector in signal sensor (4) on fire triggers step 1.,
Two-way high temperature signal is exported to cabinet internal controller (3) and gas extinguishing system controller (5) simultaneously；
Step 2. cabinet internal controller (3) judge it is whether on fire in power distribution cabinet,
If step 2.1 cabinet internal controller (3) receives what the smoke-sensitive alarm detector in signal sensor on fire (4) issued simultaneously
Smoke-sensitive alarm signal is then judged as on fire in power distribution cabinet；Cabinet internal controller (3) to gas extinguishing system controller (5) issue with
Signal simultaneously closes off top exhaust fan (1) and opens bottom exhaust fan (2) as signal on fire；
If step 2.2 cabinet internal controller (3) does not receive the sense of the sending of the smoke-sensitive alarm detector in signal sensor on fire (4)
Cigarette alarm signal is then judged as not on fire in power distribution cabinet；Open top part exhaust fan (1) simultaneously closes bottom exhaust fan (2), hot at this time
Air is discharged by top exhaust fan (1), and cold air is sucked by bottom exhaust fan (2), carries out air discharging and radiating；To distribution in-cabinet temperature
Lower than setting value, closing top exhaust fan (1) terminates heat dissipation；
Step 3. gas extinguishing system controller (5) receives the sending of the temperature-sensitive alarm detector in signal sensor on fire (4)
The smoke-sensitive alarm signal one of both and cabinet internal controller (3) that high temperature signal and smoke-sensitive alarm detector issue issue on fire
Signal, or receive the high temperature signal and smoke-sensitive alarm signal simultaneously, then gas extinguishing system controller (5) is judged as distribution
It is on fire in cabinet；
Step 5. gas extinguishing system controller (5) issues confirmation signal on fire to cabinet internal controller (3), then,
Step 5.1 cabinet internal controller (3) controls bottom exhaust fan (2) and opens, and top exhaust fan (1) is out of service, at this time in cabinet
Meeting air can form adverse current from top to bottom, and top flue gas is used to inhibit fire spreading；
Simultaneously, gas extinguishing system controller (5) controls gas extinguishing system and discharges firing-fighting medium step 5.2；
The firing-fighting medium of step 6. gas extinguishing system release is rapidly filled up power distribution cabinet and is put out a fire due to the effect of negative pressure,
Cabinet internal controller (3) controls bottom exhaust fan (2) and closes.
9. the application method of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 8, it is characterised in that: institute
Cabinet internal controller (3) are stated by closing bottom exhaust fan (2), delay time t, calculation formula is such as after certain delay time t
Under:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3).
10. a kind of application method of power distribution cabinet counterflow negative quick and automatic fire extinguishing system as claimed in claim 5, feature exist
In: it in turn includes the following steps,
Step 1. is triggered when with the smoke-sensitive alarm detector in signal sensor on fire, while exporting two-way smoke-sensitive alarm signal extremely
Cabinet internal controller 3 and gas extinguishing system controller 5；
Step 2. gas extinguishing system controller 5 judge it is whether on fire in power distribution cabinet,
If step 2.1 gas extinguishing system controller 5 receives the temperature-sensitive alarm detector hair in signal sensor 4 on fire simultaneously
High temperature signal out is then judged as on fire in power distribution cabinet；Gas extinguishing system controller 5 is issued to cabinet internal controller 3 and signal
As confirmation signal on fire, while gas extinguishing system controller 5 controls gas extinguishing system and discharges firing-fighting medium；
If step 2.2 gas extinguishing system controller 5 does not receive the sending of the temperature-sensitive alarm detector in signal sensor on fire
High temperature signal, and do not receive cabinet internal controller 3 sending signal on fire, then be judged as not on fire in power distribution cabinet；
After step 3. cabinet internal controller 3 receives the confirmation signal on fire of the sending of gas extinguishing system controller 5, bottom air draft is controlled
Fan 2 is opened, and top exhaust fan 1 is out of service, and meeting air can form adverse current from top to bottom in cabinet at this time, is inhibited using top flue gas
Fire spreading；
The firing-fighting medium of step 4. gas extinguishing system release is rapidly filled up power distribution cabinet and is put out a fire due to the effect of negative pressure,
Cabinet internal controller 3 is passed through after certain delay time t, closing bottom exhaust fan 2, delay time t, and calculation formula is as follows:
In formula: D- cabinet body volume；S- exhaust fan wind sweeping area；V- exhaust outlet wind speed；β-safety coefficient (1.2~1.3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811268308.9A CN109603035A (en) | 2018-10-29 | 2018-10-29 | A kind of power distribution cabinet counterflow negative quick and automatic fire extinguishing system and its application method |
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| CN115337577A (en) * | 2022-08-19 | 2022-11-15 | 江苏天合储能有限公司 | Liquid cooling cabinet fire fighting method and system and liquid cooling cabinet |
| CN117117655A (en) * | 2023-08-25 | 2023-11-24 | 江苏恩斯特系统设备有限公司 | Intelligent low-voltage power distribution cabinet |
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Application publication date: 20190412 |