CN102335491B - Pipe network type dry powder fire extinguishing system and method - Google Patents
Pipe network type dry powder fire extinguishing system and method Download PDFInfo
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- CN102335491B CN102335491B CN 201110210993 CN201110210993A CN102335491B CN 102335491 B CN102335491 B CN 102335491B CN 201110210993 CN201110210993 CN 201110210993 CN 201110210993 A CN201110210993 A CN 201110210993A CN 102335491 B CN102335491 B CN 102335491B
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Abstract
The invention discloses a pipe network type dry powder fire extinguishing system which comprises fire source detectors arranged in all subareas of a protected area, a temperature detector arranged in the protected area, a controller, a gas supply device, a mist mixing tank, subarea electric valves and spray nozzles, wherein the controller is used for receiving electrical signals from the fire source detectors and the temperature detector, or the electrical signals from the more than two fire source detectors and then sending a fire extinguishing control command; the gas supply device is electrically connected with the controller; the number of the subarea electric valves is equal to the number of the subareas; and the spray nozzles are connected with the output ends of all the subarea electric valves through pipelines. The pipe network type dry powder fire extinguishing system can perform fire extinguishment once or many times, and can perform fire extinguishment on each divided area separately.
Description
Technical field
The present invention relates to the fire prevention field, be specifically related to a kind of ductwork type powder extinguishing system and method for fire-fighting.
Background technology
All there is significant impact in fire for people's productive life and economic development, and therefore in fire-fighting domain, fire-extinguishing apparatus is one of indispensable equipment.Common fire-extinguishing apparatus has following several:
The first, fire hydrant: fire hydrant is arranged on the fire-fighting watering device on the fire water-supply pipe network, is made up of valve, delivery port and housing etc.Fire hydrant can be divided into two kinds of low pressure type and high pressure types by its hydraulic pressure; By it condition is set and is divided into two kinds of indoor formula and outdoor formula and ground type and underground types.
The second, carbon dioxide extinguisher: be that liquid carbon dioxide is compressed in the small steel cylinder, again with its ejection, the effect of cooling and secluding air arranged during fire extinguishing.Extract lock during use earlier, depress pressure handle (or turn valve) again, spout is aimed at the fire extinguishing of flame root.To wear gloves during use, to avoid skin contact spray tube and to spray sebific duct, prevent frostbite.When using carbon dioxide extinguisher to put out a fire to save life and property appliance fire, if voltage surpasses 600 volts, should cut off the power supply earlier and afterwards put out a fire.
The 3rd, dry powder extinguisher: what fill in the dry powder extinguisher is powder extinguishing agent.Powder extinguishing agent is for the dry of fire extinguishing and the attritive powder that is easy to flow, by the inorganic salts with fire extinguishing effectiveness and minor amounts of additives drying, pulverize, mix the micro-solid powder constituent.It is a kind of extinguishing chemical of being used widely in fire-fighting, and is mainly used in the fire extinguisher.
In above-mentioned three kinds of fire-extinguishing apparatus, for the very big intensity of a fire, when water was firing-fighting medium, water was vaporized and can't puts out a fire; When being firing-fighting medium with the carbon dioxide, it will be subjected to the influence of the factor of cutting off the power supply, and this is large-scale for example for operations of putting out a fire of can not cutting off the power supply such as power distribution stations for some, therefore, is that the fire-extinguishing apparatus of firing-fighting medium all can be restricted with water and carbon dioxide.For dry powder extinguisher, the volatility analyte of the inorganic salts in the dry powder with free radical or active group generation Chemical Inhibition and the secondary catalytic action that fuel in the combustion process produces, makes the chain reaction of burning interrupt and put out a fire; The powder of dry powder drops on outside the combustible surface, and chemical reaction takes place, and forms the glassy cover layer of one deck under high temperature action, thus isolated oxygen, and then fire smothering.In addition, also have part to dilute oxygen and cooling effect.The field of employment of dry powder extinguisher is unrestricted substantially, does not particularly need the place that cuts off the power supply and put out a fire for some.
Traditional dry powder extinguisher generally is portable and cart type.For the dry powder extinguisher of these two kinds of forms, all be when Attended mode, if the protection thing generation condition of a fire, the duty personnel can take off extinguishing device, extracts night bolt, fire extinguisher is aimed at the ignition point root of protection thing, presses the emergency starting handle, quick extinguishing.But unattended the time, existing extinguishing device generally can not spray extinguishing chemical automatically, and its automation performance is lower.
Weak point in view of above-mentioned dry powder extinguisher existence, the patent No. is that 201020567900.1 utility model patent discloses a kind of multi-functional dry powder extinguishing device (seeing Fig. 1 and Fig. 2), the portable dry powder extinguisher of tradition has been proposed improvement, it comprises emergency starting handle 1, Pressure gauge 2, emergent powder delivery flexible pipe or nozzle 3, control valve 4, storage powder jar 6, night bolt 8 and siphon pipe 10, storage powder jar 6 places suitable for reading are equipped with control valve 4, emergency starting handle 1 and Pressure gauge 2 are installed on the control valve 4, night bolt 8 is installed on the emergency starting handle 1, siphon pipe 10 is arranged on storage powder jar 6 inside, and siphon pipe 10 connects the control valve lower port 4-2 of control valve 4; Also comprise dry powder shower nozzle 9 and temperature-sensitive glass envelope 11, at the sidepiece of control valve 4 control valve side ports 4-1 is arranged, dry powder shower nozzle 9 is installed in the control valve side ports 4-1 outside, and install thoughts and mixes glass envelope 11 at the nozzle place of dry powder shower nozzle 9.This multi-functional dry powder extinguishing device is wall hanging (the dry powder shower nozzle is aimed at the protection thing) in the guard plot in use; during unmanned; when the protection thing generation condition of a fire; temperature-sensitive glass envelope on the dry powder shower nozzle is sensed temperature automatically and is broken and open control valve; ultra-fine (or common) powder extinguishing agent in the storage powder jar sprays self-extinguishing by siphon pipe under the driving of nitrogen.When Attended mode; fire appears; personnel can take off extinguishing device; extract night bolt; the powder delivery flexible pipe (or nozzle) of will meeting an urgent need is aimed at the ignition point root of protection thing; press the emergency starting handle, ultra-fine (or common) powder extinguishing agent in the storage powder jar sprays quick extinguishing (identical with the hand fire extinguisher occupation mode) by siphon pipe under the driving of nitrogen.
Though the patent No. is 201020567900.1 multi-functional dry powder extinguishing device the function of self-extinguishing is arranged, this dry powder extinguisher also has following weak point:
The first, in advance dry powder and nitrogen are stored in the jar in the storage powder jar, dry powder sprays under the drive of nitrogen during use.Because fire extinguisher is long-time the use once, after the storage powder jar suspension time was long, at the bottom of jar, when needs were put out a fire, dry powder did not form a loosening process to dry powder in gravity effect deposit, caused the few situation of the many powder of gas that occurs, influence fire extinguishing effect.Secondly, after by-pass valve control is opened, being stored in jar interior gas will spray totally, therefore can only form one time fire extinguishing procedure, behind the fire that is gone out resume combustion again, can not form for the second time or repeatedly fire extinguishing.The 3rd, in fire extinguishing procedure, during if any high wind; fire extinguisher also sprays the air-flow that carries dry powder in the same old way, because dry powder itself is very light, the excessive back of wind-force makes a big impact to the mobile of dry powder; cause dry powder to arrive the protected object place according to predetermined circuit, fire is extinguished.The 4th, if placed N such dry powder extinguisher in an attack area, because after in a single day the temperature-sensitive glass envelope detected temperature, it just opened control valve, like this, all dry powder extinguishers all can be worked, and for the little situation of the intensity of a fire, this will form waste.
Summary of the invention
At above-mentioned technical problem, the object of the present invention is to provide a kind of single or multiple fire extinguishing can carried out, and ductwork type powder extinguishing system and the method that can put out a fire separately to the zone of each division.
The technical scheme that realizes the object of the invention is as follows:
The ductwork type powder extinguishing system comprises the fire source probing device that is arranged at each subregion place, protected area, and the spectral signal that the fire source probing device will detect in the flame is converted to signal of telecommunication output; And
Be arranged at the hygrosensor at place, protected area, hygrosensor is converted to signal of telecommunication output with detected flame temperature; And
After controller, this controller received and come from the signal of telecommunication of fire source probing device and hygrosensor, perhaps the signal of telecommunication of two above fire source probing devices sent the fire extinguishing control instruction; And
The feeder that is electrically connected with controller, this feeder have the nitrogen of pressure according to the instruction output of controller; And
The mist that is connected with feeder by appendix mixes jar, and the controller output order is opened the valve that mist mixes jar, fully mixes forming the output of gas powder stream after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening again with nitrogen; And
The subregion motor-driven valve of setting and number of partitions equity, the subregion motor-driven valve is electrically connected with controller, and the subregion motor-driven valve mixes jar by pipeline and mist and is connected; And
Be connected in the nozzle of each subregion motor-driven valve output by pipeline.
The ductwork type dry chemical extinguishing method comprises following steps:
Step 1, controller have judged whether two and above fire source probing device signal, and fire source probing device signal and hygrosensor signal are perhaps arranged simultaneously, if judged result is for being then to enter step 2;
Step 2, the electrically operated valve that controller is controlled on the feeder is opened, and controller control feeder is exported gas in the mixed jar of mist, mist is mixed mix formation gas powder stream after a jar interior powder extinguishing agent becomes flexible again with nitrogen, mix when reaching the time of setting, enter step 3;
Step 5, controller control is opened corresponding to the subregion motor-driven valve with burning things which may cause a fire disaster place, and the gas powder stream that contains powder extinguishing agent is put out a fire separately to this subregion in this subregion by nozzle ejection;
Step 6, at interval after N minute, controller judges in each subregion whether also have not fire extinguishing and/or sleeper fire according to the signal that the fire source probing device of each subregion transmits, if judged result is for being then to return step 5; If judged result then enters step 7 for not;
Adopted such scheme, system and method for the present invention has the following advantages:
1. have the single or multiple fire extinguishing: no matter the present invention is where to catch fire for the protected area, is to open all subregion motor-driven valves for fire extinguishing first, and fire extinguishing is to extinguish the blaze comprehensively first.After fire extinguishing is finished first, detect own place subregion by each fire source probing device and whether also have not fire extinguishing and/or sleeper fire, if exist, then system can start again the subregion that has not fire extinguishing and/or sleeper fire is put out a fire individually again, till fire is knocked out, therefore, it has the characteristics of repeatability fire extinguishing.At this point, the characteristic that only possesses once fire extinguishing with traditional portable or cart type dry powder extinguisher forms huge contrast, the present invention for the fire of protected area be fully control in its scope.
2. can carry out the subregion fire extinguishing: after fire extinguishing is finished first, detect own place subregion by each fire source probing device and whether also have not fire extinguishing and/or sleeper fire, if exist, then system can start again the subregion that has not fire extinguishing and/or sleeper fire is put out a fire individually again, till fire is knocked out, therefore, it has the advantage of subregion fire extinguishing.
3. have high wind and avoid advantage, after controller receives the signal of wind speed detector, whether suspend and send fire extinguishing control instruction signal.Namely in fire extinguishing procedure; when attacking if any high wind; by the detection of wind speed detector and the judgement of controller; controller suspends output fire extinguishing control instruction; at this moment; the equipment that is connected with controller output end all quits work, and can not play the effect of saving extinguishing chemical like this to the protected area spray fire extinguishing agent.
4. have automatic loose powder and make dry powder atomizing advantage: the gas of controller control feeder output at first mixes the bottom input of jar from mist, powder extinguishing agent that mist stores in mixing jar is become flexible under the effect of the impact of gas and shearing, deposition is reduced to original graininess with powder extinguishing agent of a specified duration, so that powder extinguishing agent can fully be mixed when mixing with nitrogen, have a suitable gas-powder ratio example in this gas powder stream, be very helpful for the raising tool of fire-fighting efficiency.
Description of drawings
Fig. 1 is the front view of multi-functional dry powder extinguishing device in the prior art;
Fig. 2 is the side view of multi-functional dry powder extinguishing device in the prior art;
Fig. 3 is the structural representation of ductwork type powder extinguishing system of the present invention;
Fig. 4 is the structural representation that first kind of mist mixes jar;
Fig. 4 a is the horizontal section structure chart of first atomizer;
Fig. 4 b is the longitudinal profile structure chart of first atomizer;
Fig. 4 c is the upward view of second atomizer;
Fig. 5 mixes the structural representation of jar for second kind of mist of the present invention;
Fig. 6 mixes the structural representation of jar for the third mist of the present invention;
Fig. 7 a is the sectional structure chart of first kind of nozzle of the present invention;
Fig. 7 b is that the A of Fig. 7 a is to schematic diagram;
Fig. 7 c is the cutaway view of the embodiment one of second kind of nozzle;
Fig. 7 d is that the K of Fig. 7 c is to view;
Fig. 7 e is the enlarged drawing at the A place of Fig. 7 c;
Fig. 7 f is the cutaway view of second kind of nozzle embodiment two;
Fig. 8 is the schematic flow sheet of ductwork type dry chemical extinguishing method of the present invention;
Fig. 9 a to Fig. 9 c is the put out a fire reference picture of experimentation of the present invention;
The specific embodiment
Below in conjunction with the drawings and specific embodiments system and method for the present invention is made detailed explanation:
With reference to Fig. 3, ductwork type powder extinguishing system of the present invention, it mainly is made up of fire source probing device 10, hygrosensor 20, wind speed detector 30, controller 40, feeder 50, mixed jar 60 of mist, subregion motor-driven valve 70, nozzle 80.Fig. 1 of the present invention schematic diagram of a protected area that just schematically drawn; as required; can also expand system; namely according to the quantity of protected area; increase mist at the place, protected area of correspondence and mix jar and detector; mixed jar and the detector of these increases all are connected with same controller 40, namely form the powder extinguishing system of ductwork type.Below every part is described in detail:
With reference to Fig. 3, for the protected fire extinguishing of a needs zone, at first subregion is carried out in this zone, at each subregion place fire source probing device 10 is set, the spectral signal that the fire source probing device will detect in the flame is converted to signal of telecommunication output.The quantity of fire source probing device 10 advances to arrange according to the size of subregion, the expression of the oval frame of broken lines part from Fig. 1 as can be seen, each fire source probing device 10 all has the investigative range of oneself.
With reference to Fig. 3, the hygrosensor 20 at place, protected area, hygrosensor is converted to signal of telecommunication output with detected flame temperature.
With reference to Fig. 3, in the fire extinguishing procedure of reality, wind-force is in case above six grades, and next for dry-chemical fire extinguishing equipment, the extinguishing chemical of injection is inoperative substantially.Therefore, for fear of high wind fire extinguishing procedure is produced interference, so be provided with a wind speed detector 30 that is electrically connected with controller, after controller receives the signal of wind speed detector, whether suspend and send fire extinguishing control instruction signal.Namely in fire extinguishing procedure; when attacking if any high wind; by the detection of wind speed detector 30 and the judgement of controller; controller suspends output fire extinguishing control instruction; at this moment; the equipment that is connected with controller output end all quits work, and can not play the effect of saving extinguishing chemical like this to the protected area spray fire extinguishing agent.
With reference to Fig. 3, as core component controller 40 of the present invention, after this controller received and comes from the signal of telecommunication of fire source probing device and hygrosensor, perhaps the signal of telecommunication of two above fire source probing devices sent the fire extinguishing control instruction.For these control instructions, controller has been shown has following characteristic at least:
1. has the single or multiple fire-fighting characteristic; 2. has the subregion fire-fighting characteristic; 3. have high wind and avoid characteristic.
For above three big characteristics, be described in detail in the fire extinguishing flow process below.
With reference to Fig. 3 and Fig. 4, what wherein Fig. 4 expressed is the mixed jar of mist of first kind of embodiment of the present invention, and what Fig. 4 represented is that single mist mixes jar.As seen in Figure 3, mist mixes jars 60 and is connected with feeder 50 by appendix.Controller 40 output orders are opened the valve on the mixed jar of mist, mix formation gas powder again with nitrogen after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening and flow output.It is as follows that the mist of Fig. 4 mixes jar concrete structure:
With reference to Fig. 4 and Fig. 4 a to Fig. 4 c, mist mixes jar 60 and comprises that mist mixes tank body 61, the top that this mist mixes tank body is provided with the pressure detector 62 that the mixed tank body internal pressure of mist is detected, top and bottom that mist mixes tank body are respectively arranged with air inlet and following air inlet, and the inside of mixing tank body at mist is provided with the atomising device that makes the dry powder atomizing.Atomising device is connected with the following air inlet that mist mixes tank base, and atomising device is made of first atomizer 63 and/or second atomizer 64, and in the present embodiment, atomising device is made of first atomizer 63 and second atomizer 64.First atomizer 63 is ring pipe, is provided with first orifice 630 at the outer side surface of first atomizer, this first orifice axially with the horizontal direction parallel of first atomizer; The interior sidewall surface of first atomizer is provided with second orifice 631, and the axial and horizontal direction of first atomizer of this second orifice forms 15 °～85 ° angle.Second atomizer 64 is the air jet pipe of umbrella shape, is provided with the fumarole 641 that sprays on the mixed inner tank wall face of mist at the bottom of the umbrella of second atomizer.The outside that mist mixes tank body is provided with the distributor that distributes for power gas source, and distributor is connected with following air inlet with last air inlet respectively.Distributor comprises first distributing pipe 65 that is connected with following air inlet and second distributing pipe 66 that is connected with last air inlet, between first distributing pipe and second distributing pipe, be provided with electric T-shaped valve 67, also comprise the distribution branch road 68 of UNICOM's first distributing pipe and second distributing pipe, described distribution branch road is provided with electronic aperture valve 69.The port of export of a material efferent duct 601 passes from the sidewall that mist mixes tank body, and the entrance point of material efferent duct is positioned at mist and mixes tank body, and the entrance point of material efferent duct is horn-like.
The gas of controller control feeder output enters the bottom that mist mixes tank body 61 by electric T-shaped valve 67, first distributing pipe 65 successively, part nitrogen sprays to the tank skin that mist mixes tank body 61 from the fumarole of second atomizer, these nitrogen produce a reverse thrust from tank skin, mix the powder extinguishing agent of tank body 61 to the top promotion of the mixed tank body 61 of mist with being deposited on mist.Another part nitrogen is from first orifice 630 and 631 ejections of second orifice of first atomizer 63, because the horizontal direction parallel of first orifice 630 and first atomizer, therefore, from the nitrogen of first orifice 630 ejection the powder extinguishing agent that rises is imposed the impulsive force of horizontal direction, become the powder extinguishing agent of piece or consolidation to break up; And second orifice 631 is obliquely installed, from the nitrogen of second orifice, 631 ejections powder extinguishing agent is imposed tiltedly the impulsive force of direction down, equally to becoming piece or consolidation powder extinguishing agent to form the effect of breaking up, come from parallel, vertical, favour under the impact forces that mist mixes three axial directions of tank body 61, be stored in the powder extinguishing agents that mist mixes in the tank body 61 and be reduced into tiny graininess.Behind the loose powder time up, controller control electric T-shaped valve 67 is closed, control electronic aperture valve 69 and open, by distributing branch road 68, first atomizer, 64 outputs of second atomizer, another part nitrogen passes through second distributing pipe 66 from mix the top input of tank body 61 from mist to a part of nitrogen successively.Up and down two partly under the effect of pressure, make powder extinguishing agent after loosening mix formation gas powder with nitrogen and flow.
With reference to Fig. 3 and Fig. 5, be the mixed jar of mist of second embodiment of the invention, this illustrated mist mixes jar to be made up of the mixed jar of a plurality of parallel mists, so is parallel composite tanks again.Its concrete structure is: it comprises at least two storage powder jars 61 that are used for storage dry powder and can atomize to the dry powder in the jar and mix, identical among first atomizer that arranges in the inside of storage powder jar 61 and/or the structure of second atomizer and Fig. 4 do not repeat them here.Describe with two storage powder jars in the present embodiment, described two storage powder jars 61 are arranged on the same horizontal line, be arranged on and reduce gravity on the same horizontal line to the influence of dry-powder air-current, the speed that guarantees the dry-powder air-current that dry powder pipeline Centralized Controller is exported is even, and the meal outlets 6 of two storage powder jars 61 all are connected with dry powder pipeline Centralized Controller 6a by tube connector.Described dry powder pipeline Centralized Controller 6a is one and has a plurality of and the tank connected connecting line of storage powder, and a kind of concentrated output pipe, connecting line all communicates with output pipe, and on connecting line, also be provided with the switching device of control connection pipeline break-make, the dry powder pipeline Centralized Controller that arranges can carry out a scheduling controlling to all storage powder jars, according to the size of fire, control the quantity of the switching device of opening, realize controlling the size of dry powder amount.
The advantage of parallel composite tanks shown in Figure 5 is as follows:
1, can be according to the size of fire, by adjusting the switch of dry powder pipeline Centralized Controller, control the quantity of the storage powder jar of unlatching, guarantee the dry powder amount that fire extinguishing needs, the delay on fire extinguishing opportunity that can overcome also simultaneously that storage powder jar fault causes, also can successively open simultaneously storage powder jar, make the secondary fire extinguishing become possibility.
2, the atomising device of tank interior setting, can carry out the dry powder at the bottom of need not being deposited on for a long time jar one loosening, make dry powder from newly becoming graininess, and can make dry powder and gas carry out one to mix fully, form the fire-fighting powder air-flow of a suitable gas-powder ratio.
3, the leading tube cell and can lead to dry-powder air-current of tank interior setting, reduced dry-powder air-current and flowed out needed pressure.
With reference to Fig. 3 and Fig. 6, the mist that is third embodiment of the invention mixes jar, comprises that the gas that dry powder and gas are mixed mixes jars 61, and it is identical with the structure that single mist shown in Figure 4 mixes jar that gas mixes jars 61 structure, do not repeat them here.Mix jars 61 at gas and be connected with two storage powder jars 62, storage powder jar 62 is provided with pressure-detecting device 63, and each storage powder jar 62 mixes on jar 61 pipelines that are connected with gas and is equipped with valve 64, mixes jar 61 and stores up passage between the powder jar 62 in order to determine to open and close gas.Be provided with two storage powder jars in the present embodiment, can determine the quantity of the storage powder jar opened in use according to the size of the fire of reality, when a large amount of dry powder of the bigger needs of fire the condition of a disaster is put out a fire, we can open two storage powder jars simultaneously, guarantee that the dry powder amount can satisfy the demand of fire extinguishing, when the fire the condition of a disaster hour, we can open a storage powder jar and put out a fire, another storage powder jar is failure to actuate, when detecting the fire resume combustion, we can open another storage powder jar and put out a fire again, and the assurance fire can access effectively and put out.Certainly, the quantity of storage powder jar can also increase again, in being not limited to illustrate two.
With reference to Fig. 3, the quantity of subregion motor-driven valve 70 and subregion equity, so that can cover injection to each subregion when spraying gas powder stream, carrying out each subregion all has a motor-driven valve to manage, subregion motor-driven valve 70 is electrically connected with controller, and the subregion motor-driven valve mixes jar by pipeline and mist and is connected.
With reference to Fig. 3, nozzle is connected in the output of each subregion motor-driven valve by pipeline, and the output of a subregion motor-driven valve can connect a plurality of nozzles 80, and these nozzles can be arranged from the different angles of each subregion according to calculating, to improve the efficient of flame.A kind of combining nozzle of nozzle of the present invention, another kind are the nested type nozzles, respectively these two kinds of nozzles are described below.
With reference to Fig. 7 a and Fig. 7 b, be first kind of combining nozzle, it comprises the nozzle connection 81 that is connected with the powder extinguishing system pipe network, the axis of nozzle connection 81 is provided with the first flow 83 that supplies the dry-powder air-current circulation and dry-powder air-current is compressed, nozzle 82 is fixedly connected on the nozzle connection 81, adopt between nozzle 82 and the nozzle connection 81 and be threaded, nozzle 82 is provided with a chamber 84 at connection nozzle connection 81 places, the chamber 84 that arranges can carry out a buffering to the primary mixture of coming in from carrier pipe and mix, in chamber 84, form a stable air pressure, guaranteed from uniformity and the stability of the dry-powder air-current of spray road 85 outflows, described chamber 84 is communicated with first flow 83, also be provided with the spray road 85 that is communicated with chamber 84 of a plurality of different directions on the described nozzle 82, the spray road 85 that different directions is set has enlarged the scope that nozzle can cover, in the present embodiment, on nozzle, be the center of circle with the nozzle-axis, uniform three spray roads and six spray roads of being provided with respectively on the circle of Φ 69.5 and Φ 169, the angle of the axis in two spray roads of symmetry is 50 °, spray simultaneously primary mixture is carried out guide effect, described spray road is by air inlet section 851, compression section 852, expansion segment 853 and guide section 854 constitute, the area of section of described compression section from large to small, when dry-powder air-current during through the compression section, the speed of dry-powder air-current strengthens, increased the flow velocity of dry-powder air-current, when dry-powder air-current process expansion segment, the area of section of expansion segment changes from small to big, this moment, air velocity had certain slowing down, but the flow velocity of the dry-powder air-current that ejects through compression section and expansion segment is higher than the flow velocity of plain cylindrical form pipeline, improved the jet length of nozzle, also namely realized to cover bigger fire-fighting area, dry-powder air-current has increased after by expansion segment and has ejected the area that the back dry-powder air-current can cover, the guide section that arranges is realized the guiding to dry powder stream at last, also can prevent simultaneously the disperse of dry powder stream, guarantee the fire extinguishing effect of dry-powder air-current.
Chamber of the present invention can be processed into difform chamber, and commonly used have sphere, a taper and cylindrical:
1, chamber is spherical, adopts spherical chamber, can satisfy the requirement of wide-angle nozzle, adopts spherical chamber, and maximum can form 180 ° spray regime.
2, chamber is taper, adopts the chamber of taper, on the one hand can be to carrying out prediffusion, and prediffusion can improve the uniformity of the mixing of gas powder.
3, described chamber is cylindrical, adopts cylinder design, and is simple in structure, is convenient to processing.
Chamber in the present embodiment adopts conical design.
The first flow 83 of described nozzle connection 81 is made of compression runner 811 and expansionary channel 812, the diameter of described compression runner 811 from large to small, the diameter of described expansionary channel 812 changes from small to big.
The outlet in described spray road 85 is rounded, adopts the road junction, spray road of circular design, has guidance quality preferably, can prevent the disperse of gas powder degree of flowing through, and guarantees the fire extinguishing effect.
The outlet in described spray road 85 can also be oval, and elliptic design spray road junction, road can increase the speed of gas powder stream and the pressure when ejecting, and has improved the range of nozzle.
The end of described nozzle is dome shape, the layout that the design of employing sphere is convenient to spray.
In sum: the present invention is by being provided with a chamber at nozzle, chamber can carry out a buffering to the primary mixture of coming in from carrier pipe, assurance has uniformity from the gas powder stream that the spray road ejects, namely improved the mixed type of gas powder, guaranteed the extinguishing property of the primary mixture that ejects, in addition the structure in spray road is improved, come gas powder stream is carried out a compression by the compression section that arranges, improved the speed of gas powder stream, the expansion segment that arranges carries out a release to the gas powder stream of compression suddenly, make gas powder stream form a diffusion, enlarged the area that can be ejected into of gas powder stream, the compression of moment discharges the jet velocity that also can improve the gas powder, has improved the jet length of nozzle, the guide section that arranges is realized the guiding to dry powder stream at last, also can prevent simultaneously the disperse of dry powder stream, guarantee the fire extinguishing effect of dry-powder air-current, adopt many sprays road design, the spray road can be arranged in different directions, the coverage of the nozzle of expansion.
With reference to Fig. 7 c to Fig. 7 f, be the signal of nested type structure of nozzle, wherein Fig. 7 c to Fig. 7 e has expressed first kind of embodiment of nested type nozzle.
Fig. 7 c to Fig. 7 e, nozzle 82 comprises the nozzle body 821 that is connected with pipe network, described nozzle body inside is provided with nozzle flow channel 822, nozzle flow channel 822 passes through for the high speed dry-powder air-current, nozzle flow channel 822 be nested be provided with one the spray core 823, present embodiment is used and is adopted only core as the spray core of present embodiment, the tapering of described spray core 3 is 60 °, described spray core 823 is fixedly connected on the nozzle body 821 by fixed mount 824, it is a brace with a plurality of connection pawls, spray core 823 is by on the fixedly connected brace of screw, brace is fixed on the nozzle body 821 by connecting pawl, realization is fixing to spray core 823 and nozzle body 821, fixedly not contact connection between rear nozzle body 821 and the spray core 823, spray core 823 unsettled being arranged in the nozzle flow channel 821, form an annular spray road 825 between described spray core 823 and the nozzle body 821, the dry-powder air-current that ejects from the annular spray road can form an aerosol cover, reduce the dry powder that outer gas stream dispels disperse, improve the fire extinguishing effect, on spray core 823 axis, also be provided with one and spray runner 826, spray the dry-powder air-current that runner 826 can eject the high pressure straight line, dry-powder air-current directly acts on the burning things which may cause a fire disaster surface, dry-powder air-current bump back forms the dry powder district of a disperse, the condition of isolated burning things which may cause a fire disaster burning is put out a fire.
The end of described spray core 823 offers a groove 8231, be provided with spout regulating block 8232 in the groove 8231, spout regulating block 8232 is provided with adjustment hole 8233, adjustment hole and injection runner coaxial line, described spout regulating block 8233 adjustment holes are made up of first conical surface hole 82331 and second conical surface hole 82332, angle between two conical surfaces in described second conical surface hole 82332 is between 10 °-70 °, a compression is carried out to dry-powder air-current in first conical surface hole, improve the pressure of dry-powder air-current, second conical surface hole is carried out one to dry-powder air-current and is discharged and diffusion, improved the jet velocity of dry-powder air-current, enlarge the area that dry-powder air-current can cover, dry powder has been carried out a diffusion, also can improve the speed of its disperse in air, energy fast shut-off burning condition is realized arc extinguishing.
The inwall of described nozzle flow channel one end is provided with internal thread 8211, and it is connected with pipe network, and adopting is threaded has better seal, meets powder extinguishing system to the requirement of sealing property, and adopting simultaneously is threaded also is convenient to processing, has reduced manufacture difficulty.
Shown in Fig. 7 f, the embodiment two of nested type nozzle is as described below:
Comprise the nozzle body 821 that is connected with pipe network, described nozzle body inside is provided with nozzle flow channel 822, nozzle flow channel 822 passes through for the high speed dry-powder air-current, nozzle flow channel 822 be nested be provided with one the spray core 823, spray core 823 described in the present embodiment is composite core, described composite core has the taper combination core 828 by 60 ° taper combination core 827 and 30 ° to constitute, 60 ° of taper combination cores 827 directly are nested in the nozzle flow channel 821, described 30 ° taper combination core 828 is nested in 60 ° of taper combination cores 827, described composite core is fixedly connected on the nozzle body 821 by fixed mount 824, realization is fixing to spray core 823 and nozzle body 821, fixedly not contact connection between rear nozzle body 821 and the spray core 823, spray core 823 unsettled being arranged in the nozzle flow channel 821, form the first annular spray road 829 between described 60 ° of tapers combination core 827 and the nozzle body 821, formed the second annular spray road 8210 between two taper combination cores, the dry-powder air-current that ejects from the first annular spray road and the second annular spray road can form an aerosol cover, reduce the dry powder that outer gas stream dispels disperse, improve the fire extinguishing effect, the dry-powder air-current Mass fast that the while second annular spray road 8210 ejects, improve blow-off velocity, on the axis of 30 ° of taper combination cores, also be provided with one and spray runner, spray the dry-powder air-current that runner can eject the high pressure straight line, dry-powder air-current directly acts on the burning things which may cause a fire disaster surface, dry-powder air-current bump back forms the dry powder district of a disperse, the condition of isolated burning things which may cause a fire disaster burning is put out a fire.
The scope of the tapering of described taper combination core is at 30 °-90 °, and angle commonly used is by 90 °, 60 °, 45 ° and 30 °, and described taper combination core can only be nested low-angle taper combination core in the wide-angle taper combination core.
In sum, the present invention is by improving structure of nozzle, between spray core and nozzle body, form the annular spray road, the dry-powder air-current that ejects from the annular spray road, can form an aerosol cover, reduce the extraneous air air-flow to the effect that dispels of the dry powder of disperse, also can accelerate simultaneously dry powder to disperse all around, in addition, the present invention adopts the design of composite core, can prevent the influence of air outside air-flow on the one hand, the design of different angles has on the other hand increased the coverage of nozzle, and the road of the annular of different angles spray simultaneously also can accelerate dry powder dispersing, cut off burning condition fast, realize quick extinguishing.
Ductwork type dry chemical extinguishing method of the present invention comprises following steps:
Step 1; survey by fire source probing device 10 and 20 pairs of protected areas of hygrosensor; the signal of surveying is sent to controller 40, and controller 40 has judged whether two and above fire source probing device signal, and fire source probing device signal and hygrosensor signal are perhaps arranged simultaneously.If step 1 judged result is for denying, then enter step 10 and judge whether to have only a fire source probing device signal or hygrosensor signal by controller, if step 10 judged result is for being, then explanation is that fire may appear in local non-key area, then enter step 100 and send the fire alarm signal, manually handle by the aspect notice; If step 10 judged result is not, illustrating does not have fire to occur, and then returns step 1 and continues to detect.If step 1 judged result for being, then may be that fire appears in the key preservation area, then enter following steps and put out a fire in the key area.
When judging the key preservation area and fire occurs by step 1; before entering step 2; execution in step 11; be after controller 40 receptions come from the detection signal of wind speed detector 30; execution in step 12; whether controller 40 judges wind-force greater than the P level that sets value according to the signal of telecommunication that wind speed detector 30 provides, and the P value is 6 in the present embodiment.If judged result is for being, then returning step 11 continues to detect, such information slip fiery scene from tomorrow has high wind to follow simultaneously, spray the fire extinguishing of gas powder stream if at this moment enter step 2 and 3, high wind reduces the efficient of fire extinguishing to the influence of gas powder stream, even do not have the fire extinguishing effect, thereby having the high wind that avoidance is not put out a fire when running into high wind, system of the present invention avoids characteristic.Because wind-force changes at any time, therefore, continue to detect by wind speed detector 30, judge that by controller 40 step 12 judged result is that wind-force is not less than the P level when then showing, enter step 13, controller judges according to the signal that the wind-force detector detects whether wind-force has rising or downward trend, so that select the abundant pressure of equity to inflate for mixed jar to mist.
The electrically operated valve that step 2, controller are controlled on the feeder is opened, and controller control feeder is exported gas in the mixed jar of mist, mist is mixed mix formation gas powder stream after a jar interior powder extinguishing agent becomes flexible again with nitrogen.The blowing pressure progression with wind-force progression equity is set in the controller, and it is different that the blowing pressure progression is that the asynchronism(-nization) according to inflation reaches the pressure of inflation, and therefore, when inflation, the inflationtime that controller is selected to arrange gets final product.Controller 40 is the wind scales that detect according to wind-force detector 30, step 2 is carried out selected to inflate in the mixed jar of mist with the blowing pressure of wind-force progression equity, for example, if current wind-force is 4 grades, the atmospheric pressure of then selecting to be equivalent to 4 times mixes a jar input nitrogen to mist, if current wind-force is 5 grades, the atmospheric pressure of then selecting to be equivalent to 5 times mixes a jar input nitrogen to mist.Can tackle current wind-force by such mode fire extinguishing procedure is produced interference, improve fire-fighting efficiency as possible.
The mist that is passed into for step 2 mixes a jar interior nitrogen, its mode is: the gas of controller 40 control feeders 50 outputs at first mixes the bottom input of jar 60 from mist, the powder extinguishing agents that mist mixed store in jars 60 become flexible under the effect of the impact of gas and shearing, powder extinguishing agent deposition is reduced to original graininess with powder extinguishing agent of a specified duration, so that can fully be mixed when mixing with nitrogen.In the process that powder extinguishing agent is become flexible, also be the process that tentatively forms the gas dust cloudization, but the gas-powder ratio of this preliminary atomization process example is also undesirable.Therefore, behind the loose powder time up, the gas part of controller control feeder output is mixed the bottom input of jar 60 from mist, another part mixes the top input of jar 60 from mist, the top input nitrogen gas pressure of mixing jar from mist is greater than the bottom input nitrogen gas pressure of mixing jar from mist, the nitrogen that feeds continues mixed aerosol with dry-chemical fire extinguishing and forms the gas powder stream that can put out a fire, and this gas powder has a suitable gas-powder ratio example in flowing, and is very helpful for the raising tool of fire-fighting efficiency.Mix when reaching the time of setting, enter step 3.
Step 3, after the gas powder mixed, controller control mist mixed output motor-driven valve and all subregion motor-driven valves 70 of jar and all opens, and the gas powder stream that contains powder extinguishing agent is put out a fire in the protected area first by nozzle ejection.When subregion motor-driven valve 70 is all opened, the process of mixing output gas powder stream the jar 60 from mist is: because mist mixes the gas outlet of pot bottom close to the import distance of the mixed jar 60 material efferent ducts of mist, therefore, opening the moment that mist mixes delivery valve on the jar, because mist mixes jar interior pressure greater than external atmospheric pressure, under this action of pressure, the gas major part of coming out from the gas outlet of the mixed pot bottom of mist can be introduced into the material efferent duct that mist mixes jar 60, and then flow with/gas powder the stream that hauls mixing, and on the other hand, mix jar nitrogen of 60 tops input from mist and give gas powder stream certain pressure simultaneously, it is mobile that this part gas is promoting gas powder stream like this, draw under the effect that pushes away one, gas powder stream can form the process of a mixing again in the material efferent duct, not only make unimpeded the flowing in the material efferent duct of gas powder stream, but also can be not few in the many gas of powder occurring, perhaps the many situations of powder weak breath.
For the present invention, can be divided into the single fire extinguishing, also can repeatedly put out a fire, when system sprayed gas powder stream first, all subregion motor-driven valves all will be opened, and put out a fire to carry out comprehensively.The present invention can be set to single fire extinguishing and repeatedly fire extinguishing to system, for the single fire extinguishing, behind comprehensive unlatching subregion motor-driven valve of execution of step 3, can enter step 7 and wait for the stopping signal input, and the time of single fire extinguishing is 60 seconds.But if realize repeatedly fire extinguishing, improve the reliability of protection, also need execution in step 4 to step 6.
Step 4; all subregion motor-driven valves 70 are opened to put out a fire comprehensively and are finished at interval after M minute; controller 40 is according to the signal of the fire source probing device transmission of each subregion; judge and whether also have not fire extinguishing and/or sleeper fire in each subregion; if judged result illustrates then that for not burning things which may cause a fire disaster has been eliminated, enter step 7 and judge to wait for whether the stopping signal input is arranged; if judged result is for being then to return the monitoring that step 1 enters a new round.If judged result illustrates to have not fire extinguishing and/or sleeper fire for being, then enters step 40, whether controller judges wind-force greater than the P level of setting by the signal that the wind speed detector provides, if step 40 is judged as not, then enter step 5, to fire extinguishing and/or sleeper fire are not proceeded cleaning.If step 40 judged result is for being then to enter step 41.Step 41, the signal that controller provides by the wind speed detector judge that wind-force until less than the P level time, then enters step 5, otherwise controller is not controlled the unlatching of subregion motor-driven valve, similarly, carries out high wind and avoid before to the subregion fire extinguishing.
Step 5, controller 40 controls are opened corresponding to the subregion motor-driven valve with burning things which may cause a fire disaster place, and the gas powder stream that contains powder extinguishing agent is put out a fire separately to this subregion in this subregion by nozzle ejection.Not fire extinguishing and/or sleeper fire for fire extinguishing first, the secondary fire extinguishing procedure of the present invention is the signal that transmits by subregion fire source probing device, behind the burning things which may cause a fire disaster point of controller accuracy of judgement, control is opened corresponding to the subregion motor-driven valve of this burning things which may cause a fire disaster, to fire extinguishing and/or sleeper fire do not spray gas powder stream.This has illustrated that also the present invention need not to open all subregion motor-driven valves when putting out a fire for the second time, and the local subregion motor-driven valve of opening corresponding burning things which may cause a fire disaster is put out a fire, and can form effective control for the use of powder extinguishing agent.
Step 6, carried out interval, the subregion fire extinguishing back second time N minute, controller 40 is according to the signal of the fire source probing device transmission of each subregion, judge and whether also have not fire extinguishing and/or sleeper fire in each subregion, if judged result is for being, then also there is ignition point in Dui Ying subregion, returns the corresponding subregion motor-driven valve 70 of step 5 unlatching and proceeds fire extinguishing; If judged result shows then that for not all burning things which may cause a fire disaster have all been removed, can return step 1 under automatic mode, enter a new round and detect, and enter step 7 under manual mode, judge artificial input signal through after repeatedly putting out a fire.
Describe below in conjunction with the fire extinguishing procedure of fire extinguishing laboratory reference figure:
Referring to Fig. 9 a to Fig. 9 c, lay out 10 in the fire pot of 50mm * 50mm in idle place, select to inject the big transformer oil of fire extinguishing difficulty in back on fire in every fire pot.After treating that the ductwork type powder extinguishing system is ready, every fire pot is lighted a fire, as can be seen from the figure, the fire burns in every fire pot gets all very vigorous.Start fire extinguishing system of the present invention, controller control feeder mixes jar to mist and inflates, after being become flexible powder extinguishing agent, mixes with powder extinguishing agent again nitrogen, the gas powder that will mix then nozzle (nozzle is 11 meters apart from farthest fire pot, is 3 meters apart from the nearest fire pot) ejection of flowing through.Behind nozzle ejection gas powder stream, a slice of entire field vast expanse of whiteness, all fire pot are all shrouded in these gas powder stream, and through 15 seconds time, the fire in all fire pot all extinguished.
Claims (18)
1. ductwork type powder extinguishing system is characterized in that:
Comprise the fire source probing device that is arranged at each subregion place, protected area, the spectral signal that the fire source probing device will detect in the flame is converted to signal of telecommunication output; And
Be arranged at the hygrosensor at place, protected area, hygrosensor is converted to signal of telecommunication output with detected flame temperature; And
After controller, this controller received and come from the signal of telecommunication of fire source probing device and hygrosensor, perhaps the signal of telecommunication of two above fire source probing devices sent the fire extinguishing control instruction; And
The feeder that is electrically connected with controller, this feeder have the nitrogen of pressure according to the instruction output of controller; And
The mist that is connected with feeder by appendix mixes jar, described mist mixes jar and comprises that mist mixes tank body, the top that this mist mixes tank body is provided with the pressure detector that the mixed tank body internal pressure of mist is detected, top and bottom that mist mixes tank body are respectively arranged with air inlet and following air inlet, the inside of mixing tank body at mist is provided with the atomising device that makes the dry powder atomizing, atomising device is connected with the following air inlet that mist mixes tank base, atomising device is made of first atomizer and/or second atomizer, the outside that mist mixes tank body is provided with the distributor that distributes for power gas source, distributor is connected with following air inlet with last air inlet respectively, the port of export of a material efferent duct passes from the sidewall that mist mixes tank body, the entrance point of material efferent duct is positioned at mist and mixes tank body, the entrance point of material efferent duct is horn-like, described second atomizer is the air jet pipe of umbrella shape, be provided with at the bottom of the umbrella of second atomizer to mist and mix the jet fumarole of inner tank wall face, described controller output order is opened the valve on the mixed jar of mist, mixes formation gas powder again with nitrogen after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening and flows output; And
The subregion motor-driven valve of setting and number of partitions equity, the subregion motor-driven valve is electrically connected with controller, and the subregion motor-driven valve mixes jar by pipeline and mist and is connected; And
Be connected in the nozzle of each subregion motor-driven valve output by pipeline.
2. whether ductwork type powder extinguishing system according to claim 1 is characterized in that: also comprise a wind speed detector that is electrically connected with controller, after controller receives the signal of wind speed detector, suspend and send fire extinguishing control instruction signal.
3. ductwork type powder extinguishing system according to claim 1, it is characterized in that: first atomizer is ring pipe, is provided with first orifice at the outer side surface of first atomizer, this first orifice axially and the radial parallel of coil pipe; The interior sidewall surface of first atomizer is provided with second orifice, this second orifice axially and coil pipe radially form 30 °～50 ° angle.
4. ductwork type powder extinguishing system according to claim 1, it is characterized in that: described distributor comprises first distributing pipe that is connected with following air inlet and second distributing pipe that is connected with last air inlet, between first distributing pipe and second distributing pipe, be provided with electric T-shaped valve, also comprise the distribution branch road of UNICOM's first distributing pipe and second distributing pipe, described distribution branch road is provided with electronic aperture valve.
5. ductwork type powder extinguishing system according to claim 1, it is characterized in that: described nozzle comprises the nozzle connection that is connected with the powder extinguishing system pipe network, the axis of nozzle connection is provided with the first flow that circulates and dry-powder air-current is compressed for dry-powder air-current, nozzle is fixedly connected on the nozzle connection, nozzle is that the nozzle connection junction is provided with a chamber, described chamber is connected with first flow, also be provided with the spray road that is communicated with chamber of a plurality of different directions on the described nozzle, described spray road is by the air inlet section, the compression section, expansion segment and guide section constitute, the area of section of described compression section from large to small, the area of section of expansion segment changes from small to big.
6. ductwork type powder extinguishing system according to claim 5 is characterized in that: described chamber is spherical chamber or taper chamber or is cylindrical chamber.
7. ductwork type powder extinguishing system according to claim 5, it is characterized in that: the first flow of described nozzle connection is made of compression runner and expansionary channel, the area of section of described compression runner from large to small, the area of section of described expansionary channel changes from small to big.
8. ductwork type powder extinguishing system according to claim 5 is characterized in that: the outlet in described spray road is for circular and/or oval.
9. ductwork type powder extinguishing system according to claim 1, it is characterized in that: described nozzle body inside is provided with nozzle flow channel, nozzle flow channel be nested be provided with one the spray core, described spray core is fixedly connected on the nozzle body by fixed mount, form an annular spray road between described spray core and the nozzle body, on the spray wire mandrel, also be provided with one and spray runner.
10. ductwork type powder extinguishing system according to claim 9, it is characterized in that: the end of described spray core offers a groove, be provided with the spout regulating block in the groove, the spout regulating block is provided with and the adjustment hole that sprays the runner coaxial line, described spout regulating block adjustment hole is made up of first conical surface hole and second conical surface hole, and the angle between two conical surfaces in described second conical surface hole is between 10 °-70 °.
11. ductwork type powder extinguishing system according to claim 9 is characterized in that: described spray core is composite core, and described composite core is made of the taper combination core of a plurality of different angles, and low-angle taper combination core is nested in the taper combination in-core of wide-angle.
12. one kind is adopted ductwork type powder extinguishing system as claimed in claim 1 to carry out the ductwork type dry chemical extinguishing method, it is characterized in that, comprises following steps:
Step 1, controller have judged whether two and above fire source probing device signal, and fire source probing device signal and hygrosensor signal are perhaps arranged simultaneously, if judged result is for being then to enter step 2;
Step 2, electrically operated valve on the controller control feeder is opened, and during controller control feeder output gas mixes jar to mist, fully mixes forming gas powder stream after making the powder extinguishing agent of mist in mixing jar loosening again with nitrogen, mix when reaching the time of setting, enter step 3;
Step 3, controller control mist mixes output motor-driven valve and all subregion motor-driven valves of jar and all opens, and the gas powder stream that contains powder extinguishing agent is put out a fire in the protected area first by nozzle ejection;
Step 4, at interval after M minute, controller judges in each subregion whether also have not fire extinguishing and/or sleeper fire according to the signal that the fire source probing device of each subregion transmits, if judged result is for being to enter step 5;
Step 5, controller control is opened corresponding to the subregion motor-driven valve with burning things which may cause a fire disaster place, and the gas powder stream that contains powder extinguishing agent is put out a fire separately to this subregion in this subregion by nozzle ejection;
Step 6, at interval after N minute, controller judges in each subregion whether also have not fire extinguishing and/or sleeper fire according to the signal that the fire source probing device of each subregion transmits, if judged result is for being then to return step 5.
13. ductwork type dry chemical extinguishing method according to claim 12, it is characterized in that, if step 1 judged result is for denying, then enter step 10 and judge whether to have only a fire source probing device signal or hygrosensor signal by controller, if judged result is for being, then enter step 100 and send the fire alarm signal, if judged result is then returned step 1 and continued to detect for not.
14. ductwork type dry chemical extinguishing method according to claim 12 is characterized in that, a wind speed detector is provided, and following steps also are set between step 1 and step 2:
Step 11, for after being, controller receives the detection signal that comes from the wind speed detector in step 1 judged result;
Step 12, controller be according to the signal of telecommunication that the wind speed detector provides, and judges wind-force whether greater than the P level of setting value, if judged result is for being then to return step 11 and continue detection; Then if judged result for not, then enters step 2.
15. ductwork type dry chemical extinguishing method according to claim 14, it is characterized in that, the blowing pressure progression corresponding with wind-force progression is set in the controller, controller is carried out step 2 and is selected to inflate in the mixed jar of mist with the blowing pressure of wind-force progression equity according to the wind scale of wind-force detector detection.
16. according to claim 14 or 15 described ductwork type dry chemical extinguishing methods, it is characterized in that, following steps also be set between step 4 and step 5:
Step 40, controller be by the signal that the wind speed detector provides, and judges that wind-force whether greater than the P level of setting, if be judged as not, then enters step 5, or judged result is for being then to enter step 41;
Step 41, the signal that controller provides by the wind speed detector judge that wind-force until less than the P level time, then enters step 5, otherwise controller is not controlled the unlatching of subregion motor-driven valve.
17. ductwork type dry chemical extinguishing method according to claim 12, it is characterized in that, in step 2, the gas of controller control feeder output at first mixes the bottom input of jar from mist, making mist mix a jar interior powder extinguishing agent of storing becomes flexible, behind the loose powder time up, the gas part that controller control feeder is exported is imported from the bottom that mist mixes jar, and another part mixes the top input of jar from mist.
18. ductwork type dry chemical extinguishing method according to claim 16 is characterized in that, if the judged result of step 6 is for being that then also there is ignition point in Dui Ying subregion, returns step 41 and carries out putting out a fire after the wind-force detection again.
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| CN 201110210993 CN102335491B (en) | 2011-07-27 | 2011-07-27 | Pipe network type dry powder fire extinguishing system and method |
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| CN 201110210993 CN102335491B (en) | 2011-07-27 | 2011-07-27 | Pipe network type dry powder fire extinguishing system and method |
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