CN202398012U - Pipe network type dry powder fire extinguishing system for sub-areas - Google Patents
Pipe network type dry powder fire extinguishing system for sub-areas Download PDFInfo
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- CN202398012U CN202398012U CN2011202670743U CN201120267074U CN202398012U CN 202398012 U CN202398012 U CN 202398012U CN 2011202670743 U CN2011202670743 U CN 2011202670743U CN 201120267074 U CN201120267074 U CN 201120267074U CN 202398012 U CN202398012 U CN 202398012U
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Abstract
The utility model discloses a pipe network type dry powder fire extinguishing system for sub-areas, which comprises fire source detectors, a temperature detector, an A/D converter, a controller, an air supply device, a fog mixing tank, sub-area motor operated valves and nozzles, wherein the fire source detectors are arranged at all sub-areas of a protected area; the temperature detector is arranged at the protected area; the air supply device is electrically connected with the controller; the fog mixing tank is connected with the air supply device through an air delivery pipe; the sub-area motor operated valves are the same as the sub-areas in number; and the nozzles are connected with the output ends of the sub-area motor operated valves through pipelines. The pipe network type dry powder fire extinguishing system has the advantages of extinguishing fire at each sub-area independently.
Description
Technical field
The utility model relates to the fire prevention field, is specifically related to a kind of ductwork type subregion powder extinguishing system that is used 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 kinds:
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,, prevent frostbite to avoid skin contact spray tube and to spray sebific duct.When using carbon dioxide extinguisher to put out a fire to save life and property appliance fire,, should cut off the power supply earlier and afterwards put out a fire if voltage surpasses 600 volts.
The 3rd, dry powder extinguisher: what fill in the dry powder extinguisher is powder extinguishing agent.Powder extinguishing agent is be used to put out a fire dry and the attritive powder that is easy to flow, by the inorganic salts with fire extinguishing effectiveness and minor amounts of additives through drying, pulverize, mix the micro-solid powder constituent.It is a kind of extinguishing chemical of in fire-fighting, being used widely, 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 can't be put out a fire by gasification; When being firing-fighting medium with the carbon dioxide, it will receive the influence of outage factor, and this large-scale for example supplies the operations of putting out a fire of can not cutting off the power supply such as power distribution station 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 produced in the combustion process, 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 under high temperature action, forms the glassy cover layer of one deck, 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 basically, particularly for some places that need not cut off the power supply and put out a fire.
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 the pulse ultrafine dry powder extinguishing installation (seeing figures.1.and.2) that 201020534649.9 utility model patent discloses a kind of many Starting mode, comprises shell 1, current divider 2, gas generator 4, sealing plate 13, retainer ring 14, start-up control box 16; Current divider 2 is welded on shell 1 inside; Gas generator 4 is fixed on enclosure through nut; Shell 1 internal shunt device 2 outsides are full of ultra-fine dry powder extinguishing agent 12, and sealing plate 13 is the spout seal of shell 1, through retainer ring 14 with sealing plate 13 and shell 1 fixation; Shell 1 top is welded with fixture 1; Fixture 1 and fixture 22 are connected through bolt, and the start-up control box is installed in through nut 16 on the screw of fixture 1, directly draws heat-sensitive line or the fuse gas-forming agent in gas generator 4.
The course of work of this utility model does, the first, start through heat-sensitive line or the fuse that spreads all over the guard plot: when the guard plot breaking out of fire; Its sense temperature is ignited after reaching autoignition temperature, passes nut 5, is transmitted to gas generator 4; Ignite gas-forming agent, the mass air flow of gas-forming agent moment generation quickens through the tap hole on the current divider 2, breaks through barrier film 3; Promote ultra-fine dry powder extinguishing agent 12, break through sealing plate 13 again, ultra-fine dry powder 12 pulse high velocity jet are arrived the guard plot.
The second, the self-contained battery through the start-up control box starts: the end of probe connector that the start-up control box is reserved can connect the mixing switch, when temperature reaches alarm temperature; Mixing switch 23 closures, electric current through switch one 26 point of ignition duration and degree of heatings 34, are ignited gas-forming agent by start-up circuit; Whole device starts, and gas-forming agent quickens through the hole on the current divider 2, breaks through barrier film 3; Promote ultra-fine dry powder 12, break through sealing plate 13 again, ultra-fine dry powder 12 pulse high velocity jet are arrived by the protection zone; At this moment, switch 1 breaks off, switch 2 27 closures, and electric current makes relay K 2 charged through switch 2 27, and indicator lamp 35 is bright, and switch 5 30 breaks off, switch 6 31 closures, the output of interlock signal, switch 7 32 breaks off, switch 8 33 closures, feedback signal output; Switch 3 28 breaks off, switch 4 29 closures, and whole loop is in self-locking state, and when temperature reduced, mixing switch 23 broke off, and started loop 20 and recovered effective duty again.
Though the patent No. is the function that the pulse ultrafine dry powder extinguishing installation of many Starting mode of 201020534649.9 has self-extinguishing, this dry powder extinguisher also has following weak point:
The first, if in a protected area, placed N such dry powder extinguisher, because after in a single day Temperature Detector detect temperature; It just opens control valve, and like this, all dry powder extinguishers all can be worked; For the little situation of the intensity of a fire, this will form waste.Secondly, after by-pass valve control is opened, the gas that is stored in the housing 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 advance dry powder and nitrogen are stored in the housing in the housing, dry powder sprays under the drive of nitrogen during use.Because fire extinguisher is long-time the use once, after the time is long, dry powder in gravity effect deposit at housing; When needs are put out a fire; Dry powder does not form a loosening process, causes in the mixed airflow of ejection the few situation of the many powder of gas to occur, thus influence fire extinguishing effect.
Summary of the invention
To above-mentioned technical problem, the purpose of the utility model is to provide a kind of ductwork type subregion powder extinguishing system that can put out a fire separately to the zone of each division.
The technical scheme that realizes the utility model purpose is following:
Ductwork type subregion 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 converts signal of telecommunication output into; And
Be arranged at the hygrosensor at place, protected area, hygrosensor converts detected flame temperature into signal of telecommunication output; And
A/D converter is a data signal with the analog signal conversion of fire source probing device and/or hygrosensor output; And
Controller, this controller send the fire extinguishing control instruction after receiving and coming from the signal of A/D converter; 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 through appendix mixes jar, and the controller output order is opened the valve that mist mixes jar, mixes with nitrogen after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening to form atomization air flow and export again; And
The subregion motor-driven valve reciprocity with number of partitions is set, and the subregion motor-driven valve is electrically connected with controller, and the subregion motor-driven valve is connected for mixed jar through pipeline and mist; And
Be connected in the nozzle of each subregion motor-driven valve output through pipeline.
Adopted such scheme, the system and method for the utility model has the following advantages:
1. has the advantage of carrying out subregion fire extinguishing: when the fire source probing device of subregion or hygrosensor detect when in this subregion the condition of a fire being arranged; Controller control is opened motor-driven valve that should subregion, and dry powder nitrogen mixture stream is put out a fire in this subregion on fire through nozzle ejection.Whether also there are not fire extinguishing and/or sleeper fire through each fire source probing device detection oneself place subregion; 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, also has the advantage that can repeatedly put out a fire simultaneously.
2. 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 atomization air flow, have very big help for the raising of fire-fighting efficiency.
Description of drawings
Fig. 1 is the front view of the pulse ultrafine dry powder extinguishing installation of many Starting mode in the prior art;
Fig. 2 is the circuit theory diagrams of the pulse ultrafine dry powder extinguishing installation of many Starting mode in the prior art with the start-up control box;
Fig. 3 is the structural representation of the ductwork type subregion powder extinguishing system of the utility model;
Fig. 4 mixes the structural representation of jar for mist;
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 a is the cross-sectional view of nozzle in the utility model;
Fig. 5 b is that the A of Fig. 5 a is to view;
Fig. 6 is the schematic flow sheet of the ductwork type dry chemical extinguishing method of the utility model;
In the accompanying drawing, 10 is the fire source probing device, and 20 is hygrosensor, and 30 is A/D converter, and 40 is controller, and 50 is feeder; 60 for mist mixes jar, and 61 for mixing tank body, and 62 is pressure detector, and 63 is first atomizer, and 630 is first orifice, and 631 is second orifice; 64 is second atomizer, and 641 is fumarole, and 65 is first distributing pipe, and 66 is second distributing pipe, and 67 is electric T-shaped valve; 68 for distributing branch road, and 69 is electronic aperture valve, and 70 is the subregion motor-driven valve, and 80 is nozzle, and 81 is nozzle connection; 82 is nozzle, and 83 is first flow, and 811 are the compression runner, and 812 is expansionary channel, and 84 is chamber; 85 are the spray road, and 851 are the air inlet section, and 852 is the compression section, and 853 is expansion segment, and 854 is guide section.
The specific embodiment
With reference to Fig. 3, the ductwork type subregion powder extinguishing system of the utility model, it mainly is made up of fire source probing device 10, hygrosensor 20, A/D converter 30, controller 40, feeder 50, mixed jar 60 of mist, subregion motor-driven valve 70, nozzle 80.Fig. 1 of the utility model sketch map of a protected area (4 subregions) that just schematically drawn; As required; Can also expand system, promptly, increase mist at the place, protected area of correspondence and mix jar and detector according to the quantity of protected area; The mist of these increases mixes jar and detector all is connected with same controller 40, promptly forms the powder extinguishing system of ductwork type.Carry out detailed explanation in the face of every part down:
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 converts signal of telecommunication output into.The quantity of fire source probing device 10 advances to arrange that the expression of the oval frame of broken lines part from Fig. 1 can find out that each fire source probing device 10 all has the investigative range of oneself according to the size of subregion.
The place, protected area is provided with hygrosensor 20, and hygrosensor converts detected flame temperature into signal of telecommunication output.
A/D converter 30 is a data signal with the analog signal conversion of fire source probing device and/or hygrosensor output, uses to offer controller.
As the core component controller 40 of the utility model, this controller sends the fire extinguishing control instruction after receiving and coming from the signal of telecommunication of A/D converter 30.For these control instructions, controller has been shown has following characteristic at least:
1. has the subregion fire-fighting characteristic; 2. it is loosening and make the dry powder atomization characteristics to have the powder extinguishing agent of making;
For above two big characteristics, set forth in detail in the fire extinguishing flow process below.
Feeder 50 is electrically connected with controller, and this feeder has the nitrogen of pressure according to the instruction output of controller.
With reference to Fig. 4, Fig. 4 a, Fig. 4 b, Fig. 4 c, mist mixes jar 60 and is connected with feeder 50 through appendix.Controller 40 output orders are opened the valve on the mixed jar of mist, mix the formation atomization air flow again with nitrogen after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening and export.The concrete structure that mist is mixed jar is following:
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 set inside of mixing tank body at mist has 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 up of first atomizer 63 and/or second atomizer 64, and in this embodiment, atomising device is made up of first atomizer 63 and second atomizer 64.First atomizer 63 is a ring pipe, on the outer side surface of first atomizer, is provided with first orifice 630, the horizontal direction parallel of axial and first atomizer of this first orifice; 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, and the angle of the utility model is 30 °.Second atomizer 64 is the air jet pipe of umbrella shape, is provided with at the bottom of the umbrella of second atomizer to spray in mist to mix the fumarole 641 on the inner tank wall face.The outside that mist mixes tank body is provided with the distributor that is used for the power gas source distribution, 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 course of work that mist mixes jar is: the gas of controller 40 control feeders 50 outputs gets into the bottom of the mixed tank body 61 of mist successively through electric T-shaped valve 67, first distributing pipe 65; 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, and the powder extinguishing agent that is deposited on the mixed tank body 61 of mist is promoted to the top that mist mixes tank body 61.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 be broken up; And second orifice 631 is obliquely installed; Powder extinguishing agent is imposed the impulsive force of oblique lower direction from the nitrogen of second orifice, 631 ejections; 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, through 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 the powder extinguishing agent after loosening mix the formation atomization air flow with nitrogen.
The quantity of subregion motor-driven valve 70 and subregion equity; So that when the jet atomization air-flow, can cover injection to each subregion; Carrying out each subregion all has a motor-driven valve to manage, and subregion motor-driven valve 70 is electrically connected with controller, and the subregion motor-driven valve mixes jar through pipeline and mist and is connected.
With reference to Fig. 4, nozzle 80 is connected in the output of each subregion motor-driven valve through 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.The concrete structure of nozzle is following:
With reference to Fig. 5 a and Fig. 5 b, it comprises the nozzle connection 81 that is connected with the powder extinguishing system pipe network, and 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, adopts between nozzle 82 and the nozzle connection 81 to be threaded, and nozzle 82 is provided with a chamber 84 at connection nozzle connection 81 places; The chamber 84 that is provided with can carry out a buffering to the primary mixture of coming in from carrier pipe and mix, and in chamber 84, forms a stable air pressure, has guaranteed from spraying the uniformity and the stability of the dry-powder air-current that flows out in road 85; Described chamber 84 is communicated with first flow 83, also is provided with the spray road 85 that is communicated with chamber 84 of a plurality of different directions on the said nozzle 82, and 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, on the circle of Ф 69.5 and Ф 169, be uniformly distributed with respectively and be provided with three spray roads and six spray roads with the nozzle-axis; The angle of the axis in two spray roads of symmetry is 50 °, sprays simultaneously primary mixture is carried out guide effect, and described spray road is made up of air inlet section 851, compression section 852, expansion segment 853 and guide section 854; 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, and has 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, and 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 promptly realized covering bigger fire-fighting area, dry-powder air-current has increased after through expansion segment and has ejected the area that the back dry-powder air-current can cover, the guiding that the guide section of setting realization is at last flowed dry powder; Also can prevent simultaneously the disperse of dry powder stream, guarantee the fire extinguishing effect of dry-powder air-current.
The described chamber of the utility model 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 up of with expansionary channel 812 compression runner 811, 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 dry powder nitrogen mixture degree of flowing through, and guarantees the fire extinguishing effect.
The outlet in described spray road 85 can also be oval, and the pressure of the speed that elliptic design spray road junction, road can increase dry powder nitrogen mixture stream when ejecting 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 utility model is through being provided with a chamber on nozzle, chamber can carry out a buffering to the primary mixture of coming in from carrier pipe, guarantees that the dry powder nitrogen mixture stream that ejects from the spray road has uniformity; Promptly improved the mixed type of gas powder, the extinguishing property of the primary mixture that has guaranteed to eject improves the structure in spray road in addition; Come dry powder nitrogen mixture stream is carried out a compression through the compression section that is provided with, improved the speed of gas powder, the expansion segment of setting carries out a release to the dry powder nitrogen mixture stream of compression suddenly; Make dry powder nitrogen mixture stream form a diffusion; Enlarged the area that can be ejected into of dry powder nitrogen mixture 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 is provided with is at last realized the guiding to dry powder stream; 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. 6, the ductwork type dry chemical extinguishing method of the utility model comprises following steps:
Step 1 is surveyed through fire source probing device 10 and/or 20 pairs of protected areas of hygrosensor, is that data signal is sent to controller 40 and judges through A/D converter 30 with analog signal conversion.If step 1 judged result is for denying.If step 1 judged result for being, shows it is that subregion has had the fire appearance, then get into following steps subregion on fire is put out a fire.
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 the formation atomization air flow again with nitrogen after a jar interior powder extinguishing agent becomes flexible.Be provided with the progression of the blowing pressure in the controller, controller can make step 2 carry out and select the blowing pressure in mist mixes jar, to inflate, improve fire-fighting efficiency as possible.
Nitrogen for step 2 is passed into mixed jar of interior nitrogen of mist; 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 that controller control feeder is exported is imported from the bottom that mist mixes jar 60, and 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 atomization air flow that can put out a fire, and it is routine to have a suitable gas-powder ratio in this atomization air flow, has very big help for the raising of fire-fighting efficiency.Mix when reaching the time of setting, get into step 3.
Step 3, after the gas powder mixed, controller control mist mixed the output motor-driven valve and the corresponding subregion motor-driven valve 70 on fire of jar and all opens, and the atomization air flow that contains powder extinguishing agent is put out a fire in the protected area through nozzle ejection first.When subregion motor-driven valve 70 is all opened, the process of mixing output atomization air flow jars 60 from mist is: because that mist mixes the gas outlet of pot bottom is near from the import distance that mist mixes jar 60 efferent ducts, therefore; In the moment of opening delivery valve on the mixed jar of mist, 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 efferent duct that mist mixes jar 60; And then flow with/the atomization air flow that hauls mixing, and on the other hand, mix jar nitrogen of 60 tops input from mist and give the atomization air flow certain pressure simultaneously; This part gas is promoting atomization air flow and is flowing like this; Draw under the effect that pushes away one, atomization air flow can form the process of a mixing again in efferent duct, not only makes atomization air flow unimpeded flowing in efferent duct; But also can be not few in the many gas of powder occurring, perhaps many situation of powder weak breath.
Claims (9)
1. ductwork type subregion 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 converts signal of telecommunication output into; And
Be arranged at the hygrosensor at place, protected area, hygrosensor converts detected flame temperature into signal of telecommunication output; And
A/D converter is a data signal with the analog signal conversion of fire source probing device and/or hygrosensor output; And
Controller, this controller send the fire extinguishing control instruction after receiving and coming from the signal of A/D converter; 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 through appendix mixes jar, and the controller output order is opened the valve that mist mixes jar, mixes with nitrogen after the nitrogen that feeding feeder provides makes the powder extinguishing agent that is stored in the tank body loosening to form atomization air flow and export again; And
The subregion motor-driven valve reciprocity with number of partitions is set, and the subregion motor-driven valve is electrically connected with controller, and the subregion motor-driven valve is connected for mixed jar through pipeline and mist; And
Be connected in the nozzle of each subregion motor-driven valve output through pipeline.
2. ductwork type subregion powder extinguishing system according to claim 1; It is characterized in that: said mist mixes jar and comprises that mist mixes tank body, and 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, and top and bottom that mist mixes tank body are respectively arranged with air inlet and following air inlet; The set inside of mixing tank body at mist has 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 up of first atomizer and/or second atomizer, and the outside that mist mixes tank body is provided with the distributor that is used for the power gas source distribution; 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, 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.
3. ductwork type subregion powder extinguishing system according to claim 2; It is characterized in that: first atomizer is a ring pipe; On the outer side surface of first atomizer, be provided with first orifice, the horizontal direction parallel of axial and first atomizer of this first orifice; The interior sidewall surface of first atomizer is provided with second orifice, and the axial and horizontal direction of first atomizer of this second orifice forms 15 °-85 ° angle.
4. ductwork type subregion powder extinguishing system according to claim 2 is characterized in that: said second atomizer is the air jet pipe of umbrella shape, is provided with at the bottom of the umbrella of second atomizer to spray in mist to mix the fumarole on the inner tank wall face.
5. ductwork type subregion powder extinguishing system according to claim 2; 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.
6. ductwork type subregion powder extinguishing system according to claim 1; It is characterized in that: said 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 supplies dry-powder air-current to circulate and dry-powder air-current is compressed; Nozzle is fixedly connected on the nozzle connection, and nozzle is that the nozzle connection junction is provided with a chamber, and 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 said nozzle; Described spray road is made up of air inlet section, compression section, expansion segment and guide section, the area of section of described compression section from large to small, the area of section of expansion segment changes from small to big.
7. ductwork type subregion powder extinguishing system according to claim 6 is characterized in that: described chamber perhaps is cylindrical for spherical or taper.
8. compound nozzle according to claim 6; It is characterized in that: the first flow of described nozzle connection is made up 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.
9. compound nozzle according to claim 6 is characterized in that: the outlet in described spray road is for circular and/or oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202670743U CN202398012U (en) | 2011-07-27 | 2011-07-27 | Pipe network type dry powder fire extinguishing system for sub-areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202670743U CN202398012U (en) | 2011-07-27 | 2011-07-27 | Pipe network type dry powder fire extinguishing system for sub-areas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102406999A (en) * | 2011-07-27 | 2012-04-11 | 江苏中瑞电保智能装备有限公司 | Pipe network type divisional dry powder fire extinguishing system and method |
| CN104389629A (en) * | 2014-12-04 | 2015-03-04 | 安徽理工大学 | Gas and solid jet active flame-retarding explosion-suppressing unit |
| CN108613561A (en) * | 2018-07-12 | 2018-10-02 | 李晓敏 | A kind of heating furnace super fine dry powder fire extinguisher |
-
2011
- 2011-07-27 CN CN2011202670743U patent/CN202398012U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102406999A (en) * | 2011-07-27 | 2012-04-11 | 江苏中瑞电保智能装备有限公司 | Pipe network type divisional dry powder fire extinguishing system and method |
| CN104389629A (en) * | 2014-12-04 | 2015-03-04 | 安徽理工大学 | Gas and solid jet active flame-retarding explosion-suppressing unit |
| CN108613561A (en) * | 2018-07-12 | 2018-10-02 | 李晓敏 | A kind of heating furnace super fine dry powder fire extinguisher |
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