CN102538119B - Safe evacuation system for airflow closed channel on side of building element - Google Patents
Safe evacuation system for airflow closed channel on side of building element Download PDFInfo
- Publication number
- CN102538119B CN102538119B CN 201110415014 CN201110415014A CN102538119B CN 102538119 B CN102538119 B CN 102538119B CN 201110415014 CN201110415014 CN 201110415014 CN 201110415014 A CN201110415014 A CN 201110415014A CN 102538119 B CN102538119 B CN 102538119B
- Authority
- CN
- China
- Prior art keywords
- spout
- flue gas
- air
- plenum chamber
- building element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention disclosed a safe evacuation system for an airflow closed channel on side of a building element. The safe evacuation system comprises a first static pressure box, a first nozzle, a second nozzle, a second static pressure box, a third nozzle, a fourth nozzle, a ventilation pipe and a fan and is characterized in that the first nozzle and the second nozzle are connected with the first static pressure box (1). The third nozzle and the fourth nozzle are connected with the second static pressure box (4). The first static pressure box and the second static pressure box are connected with the ventilation pipe. The ventilation pipe is connected with the fan. Due to specific design of the safe evacuation system for the airflow closed channel on side of the building element, four groupsof collision airflows are generated, and then the piston flow can be formed by the collision among airflows. Therefore, the smoke in the special area can be expelled, and then a clean and safe channel is generated in the building component, so that a clean and safe evacuation path is created for escape.
Description
Technical field
The present invention relates to a kind of personnel escape system, relate in particular to a kind of building element limit section safe escape system for closed airflow channel.
Background technology
After occuring, fire can produce a large amount of flue gases, and the main cause of death of high-temperature flue gas when being breaking out of fire.Because flue gas is higher than environment temperature, the relative air of its density will be little.The little smoke density of comparing with surrounding air can produce buoyancy, causes flue gas to move up.When flue gas moves upward when running into ceiling, because the flue gas of rear contact ceiling contacts the flue gas of ceiling before can pushing.This has just caused flue gas to move horizontally along ceiling, studies show that moving horizontally of this flue gas is breakneck, because it can take flue gas to each place of building element.
Studies show that for building element or tier building owing to the accumulation of flue gas in top of space, smoke height can constantly reduce.This will compress personnel escape's space largely, referring to Fig. 1.Personnel in this can cause building are difficult to escape.Thereby cause great personnel's property loss.If after fire occurs, can in building, form a zone clean, that low temperature does not namely have flue gas yet by various technological means, will make things convenient for largely the personnel escape.The personal security of improvement after fire occurs.Thereby reduce to greatest extent personnel's property loss.
At present correlative study shows, without any a kind of smoke control system can 100% eliminating because the caused fire smoke of fire.Existing building element fume-resisting system mainly adopts the mode that the smoke evacuation air port is set at building top to discharge fume, thereby the flue gas in the building is diluted, thereby reduces indoor flue gas concentration, but at present there is following problem in prior art:
1. flue gas dilution is not whole eliminatings, still have the flue gas of the overwhelming majority to be present in the building, and this part flue gas can cause personnel's property loss equally.
2. the flue gas dilution effect is not directly to depend on the smoke exhaust fan watt level, be that the exhaust blower exhaust air rate is larger just more effective, because the effect of smoke exhaust fan draft, in building, can form negative pressure, namely the building internal pressure is larger than outdoor, and smoke exhaust fan can't be fully extracted the difficult situation of cigarette in the building out in this case.
The simple mode technical disadvantages of discharging fume by the smoke evacuation air port for prior art, the applicant has applied for a patent of invention in 2010, denomination of invention is a kind of smoke protection system for stairwell (number of patent application: 201010580513.6) prior art is improved, the applicant is in line with the scientific idea of " stifled not as dredging ", by six independently " jet " spout produced an opposed jets district, thereby effectively stoped entering of flue gas, finally reached the effect of Smoke prevention.
Along with the further research of applicant to this problem, the applicant finds that also there is following technological deficiency in said system:
1. although can stop flue gas to enter the protection zone by " jet " spout in first to file.But because flue gas has turbulance, stochastic volatility, this so that flue gas itself vary with respect to each spout air-out speed.Thereby cause this smoke protection system for stairwell that flue gas stopped only 70-80%(percent by volume of rate), therefore remaining 20-30%(percent by volume) flue gas can enter the Smoke prevention protection zone of this patent.
2. can't get rid of process " jet " spout in first to file and hit the flue gas of fluerics, on the contrary, because up and down a plurality of efflux nozzle effect meeting is accelerated by hitting the diffusion of fluerics flue gas.
3. because can't be to getting rid of by the flue gas of head-on collision fluerics in first to file, so its main purpose of design be to strengthen fume-resisting system to the barrier effectiveness of flue gas.Be provided with altogether three pairs of six spouts at first to file fume-resisting system efflux nozzle, we find the research practice by the later stage, initial outlay fund, manufacture difficulty and operating cost in the technological improvement design increase system of first to file.
Summary of the invention
The object of the present invention is to provide a kind of building element limit section safe escape system for closed airflow channel for prior art and applicant in defective or the deficiency that first to file exists, the unique design of this building element limit section safe escape system for closed airflow channel can produce four groups of air streams of mutual head-on collision.At first form the fluerics by common air port to blowing, stop entering of flue gas by the fluerics.Secondly by flaring type spout to blowing the formation zone of positive pressure.This zone of positive pressure can be as " backing " of the Smoke prevention of fluerics.Can increase this device to flue gas stop rate in, the flue gas that enters because of the effect of flue gas turbulance in the flue gas protection zone can be got rid of.
The object of the present invention is to provide a kind of building element safe evacuation system for airflow closed channel in middle, the unique design of this building element safe evacuation system for airflow closed channel in middle can produce four groups of air streams of mutual head-on collision, by the head-on collision between the air stream.Producing piston flow, thereby the flue gas in the specific region " is driven away ", and then produce the passage of a safety, cleaning at the building element middle part, finally is that personnel's escape is created one totally, the road of seeking survival of safety
In order to realize above-mentioned task, the present invention adopts as following technical scheme is achieved:
A kind of building element limit section safe escape system for closed airflow channel, comprise the first plenum chamber and the second plenum chamber, described the first plenum chamber and the second plenum chamber symmetrical parallel arrange, and are connected by ventilation shaft between the first plenum chamber and the second plenum chamber, and ventilation shaft links to each other with blower fan;
Described the first plenum chamber lower end is provided with the first spout and the second spout, is provided with the 3rd spout and the 4th spout in the second plenum chamber upper end;
Described the first spout, the second spout and the 3rd spout and the 4th spout along continuous straight runs are symmetrical arranged, and the first spout is relative towards vertically with the air-out of the 3rd spout, and the air-out of the second spout and the 4th spout is towards intersecting.
Other technologies characteristics of the present invention are:
Described the first spout and the 3rd spout are vertically blown, and the air-out direction of the second spout and the 4th spout (6) and vertical direction angle are 1 °～5 °;
Described the first spout 2 and the 3rd spout 5 are flaring type spout, and the Area Ratio of flaring type spout exit and porch is 5:1; The exit of the first spout 2 and the 3rd spout 5 and the second spout 3 and the 4th spout 6 exit Area Ratios are 5:1; Fore-and-aft distance between the first spout 2 and the 3rd spout 5 is less than 3m; Distance between the second spout 3 and the 4th spout 6 is vertically less than 3m.
The present invention is symmetrical arranged up and down and all adopts the tilting air-supply by the second spout mouth and the 4th spout, the air-supply that realizes the second air outlet and the 4th air outlet collides, offset the vertical velocity component of air-supply, the stack horizontal velocity component, thereby the air slide that forms horizontal direction is passed, the technique effect that piston is passed stops flue gas and the upper space of incoming flow flue gas in its sphere of action is entrainmented; Simultaneously the present invention is oppositely arranged up and down and all adopts vertical ventilation by the first air outlet and the 3rd air outlet, the first air outlet and the large air supply velocity of the 3rd air outlet area are little and be in the head-on collision form, entrained dynamic pressure or the momentum of fluid itself has greatly loss after the head-on collision up and down, and the dynamic pressure of this part loss or momentum can be converted into this zone with respect to the pressure differential in the whole passage, thereby form zone of positive pressure.This and the formed flow field of tiny air outlet are distinct, the tiny air outlet here refers to the second air outlet and the 4th air outlet, so after the head-on collision of tiny air outlet because the excessive loss of momentum of momentum less with respect to itself entrained momentum, this is just so that the rear dynamic pressure conversion of tiny air outlet upper and lower sides air-out head-on collision static pressure is incomplete, thereby form the plug-flow towards channel direction, it also is above-mentioned mixed zone, see Fig. 2, this is just so that second, the 4th formed head-on collision jet, owing to the reason with larger momentum, can effectively intercept flue gas enters, the first and the 3rd air outlet is owing to the reason with larger malleation simultaneously, can effectively will pass second, the flue gas of the 4th fluerics that air outlet forms is pressed also to passage, thereby has finally played the effect that forms escape way.
The present invention compared with prior art has following technological merit:
1. the present invention's the first air outlet and the 3rd air outlet can effectively be got rid of the flue gas that enters in this zone, rather than only stop flue gas to enter the effect of the zone of positive pressure that blows formation.So consider, flue gas of the present invention stops that rate is near 100%.
2. personnel escape's passage of being comprised of air-flow of the present invention so do not account for architectural volume, also stops people's escape without any parts of the present invention when the personnel escape.
3. the present invention so do not need to arrange more inclination air port, only needs this a pair of air port of the first and the 3rd air outlet because the effect of zone of positive pressure can be got rid of the flue gas that enters in the Smoke prevention zone.So its cost is lower with respect to existing invention smoke protection system for stairwell (201010580513.6), system is simpler, and operating cost is also lower.
Description of drawings
Fig. 1 is that flue gas spreads schematic diagram in the building element passage.Wherein Fig. 1 a is the flue gas concentration distribution schematic diagram on the longitudinal section, burning things which may cause a fire disaster 10m place; Fig. 1 b is the flue gas concentration distribution schematic diagram on the longitudinal section, burning things which may cause a fire disaster 5m place; Flue gas concentration distribution schematic diagram on the longitudinal section, Fig. 1 c fire location place.
Fig. 2 is building element of the present invention limit section safe escape system for closed airflow channel air supply direction schematic diagram.
Fig. 3 building element of the present invention limit section safe escape system for closed airflow channel structural representation.
The outlet of Fig. 4 flaring type spout and inlet area are best than calculating schematic diagram.
Under the different spout fore-and-aft distances of Fig. 5, the flue gas concentration schematic diagram in the Smoke prevention protection zone.
Fig. 6 difference is under blowing mouth and the numerical value angular separation, puts the cigarette system flue gas stopped the rate schematic diagram.
Fig. 7 is that the optimum air supply velocity of different air outlet of the present invention compares schematic diagram.
Fig. 8 spreads schematic diagram for flue gas after building element of the present invention limit section safe escape system for closed airflow channel is installed.Wherein Fig. 8 a is the flue gas concentration distribution schematic diagram on the longitudinal section, burning things which may cause a fire disaster 10m place; Fig. 8 b is the flue gas concentration distribution schematic diagram on the longitudinal section, burning things which may cause a fire disaster 5m place; Fig. 8 c is the flue gas concentration distribution schematic diagram on the longitudinal section, fire location place; Fig. 8 d is that fire occurs rear 240 seconds, the flue gas concentration distribution schematic diagram on the 2m At The Height cross section of ground.
Fig. 9 is at first to file " smoke protection system for stairwell (201010580513.6) " velocity field schematic diagram
Figure 10 with compare the flue gas concentration schematic diagram in this patent Smoke prevention protection zone in first to file " smoke protection system for stairwell (201010580513.6) ".
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in more detail.
The specific embodiment
Building element refers to have definite shape here, cube, and cylinder, the interior construction spacing Constitution Elements of taper construction, such as Zhongting, corridor, platform etc.
As shown in Figure 3, building element of the present invention limit section safe escape system for closed airflow channel comprises the first plenum chamber 1 and the second plenum chamber 4, described the first plenum chamber 1 and the 4 symmetrical parallel settings of the second plenum chamber, be connected by ventilation shaft 7 between the first plenum chamber 1 and the second plenum chamber 4, ventilation shaft 7 links to each other with blower fan 8;
The first plenum chamber 1 lower end is provided with the first spout 2 and the second spout 3, is provided with the 3rd spout 5 and the 4th spout 6 in the second plenum chamber 4 upper ends;
Described the first spout 2, the second spout 3 and the 3rd spout 5 and the 4th spout 6 along continuous straight runs are symmetrical arranged, and the first spout 2 is relative towards vertically with the air-out of the 3rd spout 5, and the air-out of the second spout 3 and the 4th spout 6 is towards intersecting.
Described the first spout 2 and the 3rd spout 5 are vertically blown, and the air-out direction of the second spout 3 and the 4th spout 6 and vertical direction angle are 1 °～5 °
The first spout 2 of the present invention and the 3rd spout 5 are flaring type spout, and the Area Ratio of flaring type spout exit and porch is 5:1, and the exit of the first spout 2 and the 3rd spout 5 and the second spout 3 and the 4th spout 6 exit Area Ratios are 5:1.Why get this ratio of 5:1, be because when ratio larger, then to be converted into static pressure more thorough in the dynamic pressure in spout exit, and momentum transformation can bring larger static pressure more thoroughly, thereby form more good zone of positive pressure, better eliminating enters its inner flue gas then.But excessive discharge area can be with larger cost.And when the Area Ratio of flaring type spout exit and porch was 5:1, technical ability guaranteed that good dynamic pressure is converted into the static pressure ratio, can guarantee that again cost is incessantly too high.The schematic diagram of cost and dynamic pressure transformation efficiency ratio is seen Fig. 4.As seen from the figure, optimum flaring type spout exit and the Area Ratio of porch are 5:1, also are the selected ratio of the present invention.
Fore-and-aft distance between the first spout 2 and the 3rd spout 5 is less than 3m; Fore-and-aft distance between the second spout 3 and the 4th spout 6 is less than 3m.When air quantity one regularly, the fore-and-aft distance between the spout is crossed the jet that conference causes this spout to spray and can not be clashed, thereby can not form fluerics and zone of positive pressure, then can not effectively get rid of flue gas.Fig. 5 represents along with the increasing of spout longitudinal pitch and causes the flue gas in the Smoke prevention protection zone to change.Can find out that the flue gas concentration behind spacing 3m obviously increases.So in this patent, the longitudinal pitch of being got between spout is 3m.This distance just can guarantee the exit flow collision, thereby guarantee the formation that zone of positive pressure and jet go, the final flue gas of effectively discharging.
When fire occured, the outer clean air of blower fan suction chamber was sent into the first plenum chamber 1 and the second plenum chamber 4 by ventilation shaft.Behind plenum chamber, the dynamic pressure of the air in the ventilation shaft changes static pressure into, so that air is evenly by the first spout 2, the second spouts, 3, the three spouts 5 and the 4th spout 6.We know that the wind of any direction can resolve into the directions X that varies in size according to the vector principle, the stack of the wind of Y-direction and Z direction.As follows:
Wind speed WS1(x, y, z)=u1(x) i+v1 (y) j+w1 (z) k
Wind speed WS2(x, y, z)=u2(x) i+v2 (y) j+w2 (z) k
After wind speed WS1 and the WS2 stack be:
WS3（x,y,z）=[u1（x）+?u2（x）]i+[v1(y)+?v2(y)]j+[w1(z)+?w2(z)]k
When two differences are come the wind facies collision of flow path direction, if do not have the velocity component of Z direction.When the velocity magnitude of Y-direction equates, have:
WS3（x,y,z）=[u1（x）+?u2（x）]i+[v1(y)-?v2(y)]j+[0+?0]k
=2×u1（x）i
That is to say: understand only remaining horizontal wind speed after these two kinds of wind speed collisions, the wind speed of vertical direction can be offset.The present invention just utilizes this principle, and the first spout 2, the second spouts, 3, the three spouts 5 and the 4th spout 6 are blown simultaneously, thereby it is identical to form velocity magnitude, and direction is two fluericses of 90 ° of angles.The air of two fluericses only stays horizontal wind speed through offsetting the speed of vertical direction after clashing, thereby forms plug-flow in building element limit section, forms at last the mixed zone, as shown in Figure 2.
Simultaneously the present invention is oppositely arranged up and down and all adopts vertical ventilation by the first spout and the 3rd spout, the first spout and the large air supply velocity of the 3rd area of injection orifice are little and be in the head-on collision form, entrained dynamic pressure or the momentum of fluid itself has very large two partial losses after the head-on collision up and down, and the dynamic pressure of this part loss or momentum can be converted into this zone with respect to the pressure differential in the whole passage, thereby form zone of positive pressure.
The present invention's the first spout and the 3rd spout are flaring type spout, it and the formed flow field of tiny air outlet are distinct, the tiny air outlet here refers to the second spout, the 4th spout, so after the head-on collision of tiny air outlet because the excessive loss of momentum of momentum less with respect to itself entrained momentum, this is just so that the rear dynamic pressure conversion of tiny air outlet upper and lower sides air-out head-on collision static pressure is incomplete, thereby form the plug-flow towards channel direction, it is the mixed zone, see Fig. 2, this is just so that the second spout, the formed head-on collision jet of the 4th spout, owing to the reason with larger momentum, can effectively intercept flue gas and enter, the first spout and the 3rd spout can will pass the second spout effectively owing to have larger malleation simultaneously, press also to passage with the flue gas of the 4th fluerics that spout forms, thereby finally played the effect that forms escape way.
Like this, just the flue gas in the specific region " can be driven away ", and then the passage that produces a safety, cleaning in building element limit section, finally create clean, a safe road of seeking survival for personnel's escape.
Studies show that the too small of the second spout and the 4th spout and vertical direction, then to depart from air supply position excessively far away for convergent point, after flue gas leaks out to zone of positive pressure easily.If angle is excessive, then too small towards the wind speed of horizontal direction, cause equally easily the flue gas seepage.Research through the Patent design people is found, when the angle of the second spout and the 4th spout and vertical direction was between 1 °～5 °, this patent system skills guaranteed certain horizontal wind speed, can guarantee again the unlikely process of air supplying distance, thereby play good air-supply effect, see Fig. 6.
In addition, studies show that at the air supply velocity ratio of the first spout and the second spout certain being particular about arranged.In the certain situation of total blast volume, the first nozzle outlet air supply speed strengthens, and then the second nozzle outlet air supply speed reduces, otherwise the first muzzle velocity reduces, and then the second nozzle outlet air supply speed increases.When the first muzzle velocity strengthened, the first spout will be strengthened " shielding " effect of flue gas, and the second nozzle outlet air supply speed reduces, and then will reduce the effect of driveing of flue gas.Otherwise the first spout will reduce " shielding " effect of flue gas, and the second spout will be strengthened the effect of driveing of flue gas.So the first spout has an optimal value with the air supply velocity ratio of the second spout, studies show that when the air supply velocity ratio of the first spout and the second spout reached 5:1, the CO concentration in the Smoke prevention protection zone was minimum, sees Fig. 7.In like manner, because symmetrical effect, the 3rd spout also is 5:1 with the air supply velocity of the 4th spout than optimal value as can be known.Can be in the hope of the first spout by the air supply velocity ratio, the second spout, the 3rd spout, the air supply areas of the 4th spout, specific embodiment sees below.
In this simultaneously, the first spout and the formed zone of positive pressure of the 3rd spout and the second spout and the formed fluerics of the 4th spout cooperatively interact, and be indispensable.
At first, if there is not the fluerics, and only has zone of positive pressure.Even the first spout and the 3rd spout can form zone of positive pressure.Because the pulsating nature of flue gas, partial fume can constantly enter zone of positive pressure, is constantly extruded by the pressure in the zone of positive pressure again.This will form a dynamic equilibrium, also, ceaselessly has flue gas to enter, and the not all right flue gas that has is excluded.This just causes having all the time in the Smoke prevention protection zone flue gas to exist, and this part flue gas can cause personnel's property loss.And after adding the second spout and the formed fluerics of the 4th spout, shielding action can be played to the flue gas of wanting to enter in the Smoke prevention protection zone in the fluerics.Isolated most of flue gas, and the flue gas of slipping through the net finally can be got rid of by the malleation in the zone of positive pressure.
Secondly, if only have the fluerics, and there is not zone of positive pressure.Although the fluerics can effectively shield flue gas, because the effect of flue gas pulsating nature, its shield effectiveness is not 100%, this just so that part of smoke can directly enter in the Smoke prevention protection zone.And this part flue gas that enters, because the blowing of only having the fluerics is to opposing with the Smoke prevention protection zone (without Smoke prevention, directly can directly be blown into indoor flue gas the protection zone when identical, also can't play a protective role).This also just says that it can't be got rid of Smoke prevention protection zone in the fluerics just so that this part flue gas is in the back side of fluerics.
Generally speaking, the fluerics is equivalent to the gate of zone of positive pressure, can effectively get rid of most flue gas.Zone of positive pressure then is equivalent to the strong backing of fluerics, gets rid of because a small amount of flue gas that the flue gas pulsating nature enters.Fluerics and zone of positive pressure are indispensable.Both are complementary.
The angle design of the application's spout and vertical direction mainly is to avoid the flue gas seepage, guarantees certain horizontal wind speed and guarantee that air supplying distance is difficult for long.
Among the present invention, wherein the spout of the first spout 2 and the 3rd spout 5 has a flaring, and its size is greater than the spout size of the second spout 3 and the 4th spout 6.The main purpose that arranges like this is because the air quantity in the plenum chamber is certain, if the air quantity that row's spout is sent is large, the air quantity that another exhaust outlet is sent is just little.Under certain air quantity, how the clean level that the air outlet size is directly determining air in the exhaust gases passes is set reasonably.Because the second spout 3 and the 4th spout 6 are in the outer part, the flue gas that the wind that they are sent will be offset is many, the flue gas momentum of offsetting is large, so its wind speed size is larger than the wind speed of the second spout and the 4th spout, and the wind speed of the second spout and the 4th spout is too large, can affect personnel escape's speed and give discomfort, if wind speed is too little, just can not guarantee fully that flue gas is isolated in outside the zone of positive pressure, therefore in the identical situation of air quantity, one flaring is installed on the first spout 2 and the 3rd spout 5, can be made the wind speed of zone of positive pressure suitable, thereby reach best air-supply effect.
Because the building element passage is passway for escaping, need remarkable.Therefore the first plenum chamber and the second plenum chamber concealed installation the passing through of person who happens to be on hand for an errand person above the furred ceiling of building element passage limit section and floor respectively.
Specific embodiment:
Below provide specific embodiments of the invention, need to prove that the present invention is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection scope of the present invention.
Defer to technique scheme, as depicted in figs. 1 and 2.At first, the second spout porch area and exit Area Ratio are 1:5.And air supply velocity is than being 5:1.Because air supply velocity and area of injection orifice are proportional.This is just so that just can satisfy above-mentioned requirements when the second spout inlet area is equal with the first spout inlet area (outlet of the first spout and inlet area equate).Then working as the first area of injection orifice is 30m * 0.1m, and then the second area of injection orifice is 30m * 0.5m.The size of the first plenum chamber and the second plenum chamber is 30m * 0.6m * 0.4m, and the ventilation shaft caliber is 0.3m * 0.3m.The first spout and the 3rd nozzle outlet air supply speed are 1m/s.Air output is 3m
3/ s, the second spout and the 4th nozzle outlet air supply speed are 0.2m/s.Air output is for also being 3m
3/ s.Total air output of whole system is 12 m
3/ s.Above-mentioned the first spout is vertical with plenum chamber with the 3rd spout, and the angle of the second spout and the 4th spout and vertical direction is identical and be 3 °.All spouts are that plenum chamber all embeds concealed installation at furred ceiling and the subsurface of passage limit section.
The effect that realizes:
By such scheme, as shown in Figure 1, when fire occured in building element, because flue-gas temperature is high, ambient air temperature was low, causes flue gas to move up.When flue gas moves upward when running into ceiling, because the flue gas of rear contact ceiling contacts the flue gas of ceiling before can pushing.This has just caused flue gas to move horizontally along ceiling, is breakneck when flue gas studies show that moving horizontally of this flue gas.The first spout 2 among the present invention and the vertical ventilation of the 3rd spout 5 and air-out are towards relative, the inclination air-supply of the second spout 3 and the 4th spout 6 and angle that vertical direction is are 1 °～5 °, four groups of air streams that mutually clash have been formed, by the head-on collision between the air stream.Offset the vertical velocity component of air-supply, the stack horizontal velocity component.Thereby the air slide that forms horizontal direction is passed, and the upper space of incoming flow flue gas in its sphere of action entrainmented, as shown in Figure 2.These four strands of wind-force cross in building element mutually, have formed a zone of positive pressure and two fluericses in building element limit section.So that the flue gas in the first half space entrainments, and when stoping it to move towards zone of positive pressure, form a clean air bottom in building element limit section, as shown in Figure 8.In building element, produce the passage of a safety, cleaning, finally create clean, a safe road of seeking survival for personnel's escape.
The technological merit of comparing with formerly patent application for further this patent of checking has carried out experiment effect relatively to present patent application and patent patent smoke protection system for stairwell (201010580513.6) formerly.Both relatively carry out under same experiment condition, comprise identical exhaust smoke level, identical plenum chamber size, identical fire location and identical rate of heat release etc.
1. from the rate that stops to flue gas, because the present invention can stop effectively that by cooperatively interacting of zone of positive pressure and fluerics flue gas enters, the flue gas that enters can be got rid of again, see Fig. 9.This compares smoke protection system for stairwell (201010580513.6) can only stop that flue gas more has superiority.Because smoke protection system for stairwell (201010580513.6) can not form zone of positive pressure at all, see Fig. 8.So this patent is better to stopping of flue gas, the flue gas concentration in the protection zone is lower.As shown in figure 10, original system " smoke protection system for stairwell (201010580513.6) ",, strengthens when flue gas concentration pursues so the flue gas that enters in the Smoke prevention zone is more because the flue gas turbulance strengthens along with the passing of the duration of ignition.This patent does not then have the impact of this respect, and along with the passing of the duration of ignition, the flue gas concentration in the Smoke prevention zone maintains a steady state value, and obviously low than original system.This just illustrate this patent by the flaring type to blowing mouth and common air port to blow the zone of positive pressure that forms respectively compare existing common air port with the fluerics and more have superiority to blowing, flue gas stopped that rate is larger.
2. from the cost lattice, because spout number of the present invention only has 4 and original system has 6 spouts, this is just so that air output of the present invention has under equal conditions lacked 30% than original system.Owing to the saving of air quantity, blower fan also can become from original large model present ting model blower fan simultaneously.The building initial cost of total system will reduce more than 20% so through calculating.On operational efficiency.And because the air quantity requirement is less, so the efficient when moving is higher, the power consumption when system moves also reduces relatively.
Claims (3)
1. building element limit section safe escape system for closed airflow channel, comprise the first plenum chamber (1) and the second plenum chamber (4), described the first plenum chamber (1) and the second plenum chamber (4) symmetrical parallel setting, be connected by ventilation shaft (7) between the first plenum chamber (1) and the second plenum chamber (4), ventilation shaft (7) links to each other with blower fan (8);
It is characterized in that: described the first plenum chamber (1) lower end is provided with the first spout (2) and the second spout (3), is provided with the 3rd spout (5) and the 4th spout (6) in the second plenum chamber (4) upper end;
Described the first spout (2), the second spout (3) and the 3rd spout (5) and the 4th spout (6) along continuous straight runs are symmetrical arranged, and the first spout (2) is relative towards vertically with the air-out of the 3rd spout (5), and the air-out of the second spout (3) and the 4th spout (6) is towards intersecting.
2. building element as claimed in claim 1 limit section safe escape system for closed airflow channel, it is characterized in that: described the first spout (2) and the 3rd spout (5) are vertically blown, and the air-out direction of the second spout (3) and the 4th spout (6) and vertical direction angle are 1 °～5 °.
3. building element as claimed in claim 1 limit section safe escape system for closed airflow channel, it is characterized in that: described the first spout (2) and the 3rd spout (5) they are flaring type spout, and the Area Ratio of flaring type spout exit and porch is 5 to 1; The exit of the first spout (2) and the 3rd spout (5) and the second spout (3) and the 4th spout (6) exit Area Ratio are 5 to 1; Fore-and-aft distance between the first spout (2) and the 3rd spout (5) is less than 3m; Fore-and-aft distance between the second spout (3) and the 4th spout (6) is less than 3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110415014 CN102538119B (en) | 2011-12-13 | 2011-12-13 | Safe evacuation system for airflow closed channel on side of building element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110415014 CN102538119B (en) | 2011-12-13 | 2011-12-13 | Safe evacuation system for airflow closed channel on side of building element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102538119A CN102538119A (en) | 2012-07-04 |
| CN102538119B true CN102538119B (en) | 2013-10-23 |
Family
ID=46345664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110415014 Active CN102538119B (en) | 2011-12-13 | 2011-12-13 | Safe evacuation system for airflow closed channel on side of building element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102538119B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244172B (en) * | 2013-04-26 | 2015-04-15 | 西安建筑科技大学 | Colliding-jet tunnel fire side escape system |
| CN114165877B (en) * | 2021-11-17 | 2023-09-26 | 上海外高桥造船有限公司 | Air-conditioning exhausting end device for restaurant |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194468Y (en) * | 1994-05-21 | 1995-04-12 | 徐振昌 | Multi-function exhausting hood |
| CN100396347C (en) * | 2004-05-21 | 2008-06-25 | 南京工业大学 | Fire smoke-proof air curtain system with additional power |
| CN102003766B (en) * | 2010-12-09 | 2013-10-23 | 西安建筑科技大学 | Smoke protection system for stairwell |
-
2011
- 2011-12-13 CN CN 201110415014 patent/CN102538119B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102538119A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102003766B (en) | Smoke protection system for stairwell | |
| CN101832549B (en) | Multi-ejection grading combustion method | |
| CN102538120B (en) | Safe escape system of enclosed airflow channel at L-shaped building member edge | |
| CN102538119B (en) | Safe evacuation system for airflow closed channel on side of building element | |
| CN102563796B (en) | Safe escape system for closed airflow channel in middle of building member | |
| CN101832548A (en) | Method for arch single-stage injection fractional combustion and W flame boiler for realizing method | |
| CN102526909B (en) | Long-channel air vortex plug smoke isolation system | |
| JP5646698B1 (en) | Smoke treatment system for fire drill facility | |
| CN100396347C (en) | Fire smoke-proof air curtain system with additional power | |
| CN102538121B (en) | Safe evacuation system for airflow closed channel in middle of L-shaped building element | |
| CN106193538B (en) | A kind of fire prevention flow-guiding type flue and difunctional exhaust system | |
| CN102434901B (en) | Ring-shaped edge part airflow totally enclosed type kitchen assistant smoke discharge system | |
| CN205935554U (en) | Fire prevention water conservancy diversion formula flue and difunctional exhaust system | |
| CN102563733B (en) | Airflow closed type kitchen auxiliary smoke exhaust system with U-shaped edge part | |
| CN202569246U (en) | Air vortex plug smoke-baffling system with long passage | |
| CN210769673U (en) | Vortex ventilation device for limited space | |
| CN111412573B (en) | Basement intelligence new trend induction system | |
| CN102589029B (en) | Double-ring airflow closed auxiliary smoke exhaust system for kitchen | |
| CN205935556U (en) | Fire prevention water conservancy diversion formula flue and exhaust system | |
| CN202581289U (en) | W flame boiler with ash removal function | |
| CN102607082B (en) | Rack type airflow totally enclosed type auxiliary smoke exhaust system for kitchens | |
| CN204275315U (en) | Plume short circuit baffling device | |
| CN103245029B (en) | Breathing zone air supply and forced draft combined tunnel fire escape system | |
| CN102297422A (en) | Burn-out wind combustion device and method with low NOx emission | |
| CN103277135B (en) | Tunnel fire escape system with breathing zone air supplying and lower portion air supplying combined |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |