CN215461634U - Automatic water mist fire extinguisher in building - Google Patents

Abstract

The utility model belongs to the technical field of the technique that thin water smoke put out a fire and specifically relates to a thin water smoke automatic fire extinguishing device in building is related to, it is including being used for along the raceway of the interior top installation of building and connecting the high-pressure water supply assembly of raceway, raceway outside cover is equipped with heat insulating sleeve, be connected with a plurality of stretches out on the raceway heat insulating sleeve's thin water smoke shower nozzle, heat insulating sleeve is connected with automatic water supply assembly. This application has the effect that improves the fire prevention high temperature resistance performance of raceway when the conflagration takes place.

Description

Automatic water mist fire extinguisher in building

Technical Field

The application relates to the technical field of water mist fire extinguishing, in particular to an automatic water mist fire extinguishing device in a building.

Background

The water mist fire extinguishing is to extinguish fire by using water particles generated by high-pressure water spraying by using a special nozzle. The key to the success of water mist fire suppression is to increase the surface area of water particles per unit volume. As the surface area of the water particles increases, the heat absorption and cooling combustion reaction is more easily performed. The water particles absorbing heat are easy to vaporize, the generation of water vapor not only dilutes the oxygen concentration near the flame and suffocates the combustion reaction, but also effectively controls the heat radiation, namely, the double functions of high-efficiency cooling and oxygen-poor suffocation are realized.

In the related art, the water mist fire extinguishing device generally comprises a water delivery pipe, a plurality of water mist nozzles installed on the water delivery pipe, and water supply equipment connected with the water delivery pipe. The operator installs the raceway in the building top, and when the conflagration took place, drive water supply equipment carried high-pressure water source to the raceway and sprayed down by a plurality of thin water smoke shower nozzles to play the effect of putting out a fire fast.

Aiming at the related technologies, the inventor thinks that when the water delivery pipe extends along the building to a long length, the coverage area of the adjacent water mist spray heads is easy to have fire extinguishing dead angles, and when high-temperature flame contacts the water delivery pipe and causes damage to the water delivery pipe, the high-pressure water delivery effect of the water delivery pipe is easy to damage, and the spraying fire extinguishing effect of the subsequent water mist spray heads is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the fire-proof high temperature resistance of the water mist fire-extinguishing pipeline, the application provides an automatic fire extinguishing device with fine mist in a building.

The application provides a thin water smoke automatic fire extinguishing device adopts following technical scheme in the building:

the utility model provides a thin water smoke automatic fire extinguishing device in building, is including being used for along the raceway of the interior top installation of building with connect the high-pressure water supply assembly of raceway, raceway outside cover is equipped with heat insulation sleeve, be connected with a plurality of stretches out on the raceway heat insulation sleeve's thin water smoke shower nozzle, heat insulation sleeve is connected with automatic water supply assembly.

By adopting the technical scheme, an operator arranges the heat insulation sleeve outside the water pipe in advance, then sequentially connects a plurality of thin water spray heads along the extension direction of the water pipe, connects the water pipe with the high-pressure water supply assembly, simultaneously connects the heat insulation sleeve with the automatic water supply assembly, and finally installs the water pipe and the heat insulation sleeve at the top in the building; when a fire disaster happens, the automatic water supply assembly is started to fill a water source into the heat insulation sleeve, the high-pressure water supply assembly is started to flush a high-pressure water source into the water delivery pipe and spray by the water mist spray nozzles to extinguish the fire, the heat insulation sleeve and the water source inside the heat insulation sleeve form two layers of protection on the outer side of the water delivery pipe, and the fire prevention and high temperature resistance of the water delivery pipe when the fire disaster happens are improved.

Optionally, the automatic water supply assembly comprises a first water supply tank for externally connecting a water source, a first extraction pump is connected between the first water supply tank and the heat insulation sleeve, and a plurality of water seepage holes are formed in the heat insulation sleeve.

Through adopting above-mentioned technical scheme, when the conflagration takes place, start the retaining of an extraction feed tank of extraction pump, the water source is carried to the heat insulating sleeve intraductally and is oozed by the infiltration hole, and a plurality of infiltration holes avoid heat insulating sleeve to wash into the water source on the one hand after pressure too big, make things convenient for heat insulating sleeve in time to decompress, and a plurality of infiltration holes of on the other hand drip and drench the water source, cooperate the supplementary fire extinguishing of water mist shower nozzle.

Optionally, a water delivery end of the first extraction pump and the heat insulation sleeve are connected with a first water supply pipe, the first water supply pipe is connected with a first inflation pipe, and the first inflation pipe is connected with an inflation pump.

Through adopting above-mentioned technical scheme, after putting out a fire and accomplishing, operating personnel stops to take out pump one, starts the pump and dashes into gas in the inflation tube one, and is gaseous in leading-in heat insulation sleeve by delivery pipe one to spout fast and remain the water source in heat insulation sleeve, convenient clearance heat insulation sleeve fast.

Optionally, the high pressure water supply subassembly is including the feed tank two that is used for external water source, feed tank two with be connected with the extraction pump two between the raceway, the raceway is connected with high-pressure nitrogen gas bottle, just high-pressure nitrogen gas bottle with be provided with the stop valve between the raceway.

Through adopting above-mentioned technical scheme, when the conflagration takes place, the retaining of second extraction feed tank of operating personnel drive extraction pump two in supplies water for the raceway supplies water, opens the stop valve simultaneously, improves water supply pressure in leading-in the raceway through the high-pressure nitrogen gas that stores in the high-pressure nitrogen gas bottle, is favorable to improving the water supply pressure that the raceway is water mist shower nozzle fast, improves water mist shower nozzle's the effect that sprays.

Optionally, a mixing box is connected between the second extraction pump and the water pipe, the mixing box is connected with a drug guide pipe for guiding in the drug, and a third extraction pump is connected between the mixing box and the water pipe.

Through adopting above-mentioned technical scheme, when the conflagration takes place, raise dust, foreign particles and toxic gas more in the building, operating personnel can be with suppressing dust agent, harmful gas adsorption agent etc. by leading the leading-in mixing box of pencil in, drive two extraction water sources of extraction pump are in the leading-in mixing box, then carry the water source of mixing agent through three orientation raceway of drive extraction pump, improve the effect that fine spray shower nozzle sprayed dust fall, adsorbed harmful gas.

Optionally, the drug guide pipe is connected with the top surface of the mixing box, and the water delivery end of the second extraction pump is connected with the top surface of the mixing box;

a flow guide shell is arranged in the mixing box, two ends of the flow guide shell are communicated and form a buffer flow passage, one end of the buffer flow passage faces the top surface of the mixing box, the other end of the buffer flow passage faces the bottom surface of the mixing box, and the size of the cross section of the buffer flow passage is gradually reduced from one end facing the top surface of the mixing box to one end facing the bottom surface of the mixing box;

the top surface of mixing box is fixed with agitator motor, agitator motor's output is used for stretching into with axle center fixedly connected with (mixing) shaft in the buffering runner, the axial wall circumference of (mixing) shaft is provided with a plurality of stirring vane, just the stirring vane laminating the blower inlet casing is located inner wall in the buffering runner.

Through adopting above-mentioned technical scheme, when the conflagration takes place, operating personnel will press down the dirt agent, harmful gas adsorbs the medicament etc. by leading-in mixing box of medicine guide pipe, then drive two extraction pumps of extraction pump in the leading-in mixing box of water source, start agitator motor and rotate, the medicament mixes the water source and mixes by (mixing) shaft and a plurality of stirring vane stirring when falling along the buffering runner, start the water source behind the three extraction mixed medicament of extraction pump and leading-in the water delivery pipe at last to further improve the fine water smoke shower nozzle and spout down dust suppression, the harmful gas adsorption effect of water smoke.

Optionally, a plurality of baffle plates are arranged on the inner wall of the mixing box, the baffle plates are sequentially and alternately arranged along the falling direction of the water source, and the baffle plates are inclined downwards.

By adopting the technical scheme, after the medicament mixed water source is guided down by the diversion shell, the plurality of baffle plates alternately buffer the water source of the mixed medicament, and the uniform mixing effect of the medicament and the water source is further improved.

Optionally, still including being used for setting up the smoke alarm at the building inside top, smoke alarm is connected with the controller, just controller control connection high pressure water supply subassembly and automatic water supply subassembly.

By adopting the technical scheme, when a fire disaster occurs, the smoke alarm timely senses rising smoke in a building and timely transmits a signal to the controller, and the controller further controls and starts the high-pressure water supply assembly to supply water for the water delivery pipe and the plurality of water mist nozzles, so that the water mist nozzles can timely spray and extinguish the fire.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when a fire disaster happens, the heat-insulating sleeve and the water source inside the heat-insulating sleeve form two layers of protection at the outer side of the water pipe, so that the fireproof and high-temperature resistant performance of the water pipe is improved when the fire disaster happens;

2. the dust suppressant, the harmful gas adsorption agent and the like are led into the mixing box through the pesticide guide pipe, the stirring motor is started to stir the mixed agent and the water source, then the extraction pump III is started to extract the water source after the mixed agent and lead the water source into the water delivery pipe, and the dust suppression and harmful gas adsorption effects of the water mist sprayed by the water mist spray head are further improved.

Drawings

FIG. 1 is a schematic structural diagram of a water pipe, an insulating sleeve, a water mist nozzle, a high-pressure water supply assembly, an automatic water supply assembly, a smoke alarm and a controller which are used for embodying the installation of a roof of a building in the embodiment of the application.

FIG. 2 is a partial sectional view for embodying a mixing tank, a high-pressure nitrogen gas cylinder, a second inflation tube, a first water supply tube, a second water supply tube, a first inflation tube and an inflator in the embodiment of the present application.

Fig. 3 is an enlarged view at a in fig. 2.

FIG. 4 is a partial cross-sectional view of a mixing shaft, mixing blades, guide shell and baffles in the embodiment of the present application.

Reference number specification, 1, water delivery pipe; 11. a water mist spray head; 2. a high pressure water supply assembly; 21. a second water supply tank; 22. a second extraction pump; 23. a high-pressure nitrogen cylinder; 24. a stop valve; 25. a safety valve; 26. a second conduit; 27. a second air inflation tube; 3. a heat insulating sleeve; 31. a water seepage hole; 4. an automatic water supply assembly; 41. a first water supply tank; 42. a first extraction pump; 43. a water supply pipe I; 44. a one-way valve I; 45. a first conduit; 5. an inflator pump; 51. a first inflation tube; 6. a mixing box; 61. a drug guide tube; 62. a third extraction pump; 63. a guide shell; 631. a buffer flow channel; 64. a stirring motor; 65. a stirring shaft; 651. a stirring blade; 66. a baffle plate; 67. a second one-way valve; 68. a second water supply pipe; 69. a third conduit; 7. a smoke alarm; 71. a controller; 8. a building roof.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a water mist automatic fire extinguishing device in a building. Referring to fig. 1 and 2, the automatic water mist fire extinguishing device in a building comprises a water pipe 1, a heat insulation sleeve 3 sleeved on the outer pipe wall of the water pipe 1, and a plurality of water mist nozzles 11 sequentially installed on the pipe wall of the water pipe 1 along the axial direction of the water pipe 1, in the embodiment of the application, two water pipes 1 are taken as an example, the two water pipes 1 and the heat insulation sleeve 3 are installed in parallel along the bottom surface of a top plate 8 of the building, and the water spraying ends of the water mist nozzles 11 vertically downwards extend out of the heat insulation sleeve 3. Two raceway 1 are connected with high-pressure water supply assembly 2, and heat insulating sleeve 3 is connected with automatic water supply assembly 4, and a plurality of infiltration holes 31 are evenly seted up along self circumference and axial to heat insulating sleeve 3's outer pipe wall. The high pressure water supply assembly 2 and the automatic water supply assembly 4 may be provided outside the building to reduce damage to the high pressure water supply assembly 2 and the automatic water supply assembly 4 when a fire occurs inside the building.

When a fire disaster happens, the automatic water supply assembly 4 is started to fill a water source into the heat insulation sleeve 3, the high-pressure water supply assembly 2 is started to flush a high-pressure water source into the water pipe 1 and spray by the water mist spray nozzles 11 to extinguish the fire, the heat insulation sleeve 3 and the water source inside the heat insulation sleeve form two layers of protection at the outer side of the water pipe 1, and the fire prevention and high temperature resistance of the water pipe 1 when the fire disaster happens are improved. A plurality of infiltration holes 31 avoid insulating sleeve 3 to rush into the water source on the one hand after pressure too big, make things convenient for insulating sleeve 3 in time to release pressure, a plurality of infiltration holes 31 of on the other hand drip the trickle source, cooperate thin water smoke shower nozzle 11 to assist and put out a fire.

Referring to fig. 1 and 2, the automatic water supply assembly 4 includes a first water supply tank 41 externally connected to a water supply source, a first conduit 45 is connected to a top surface of the first water supply tank 41, a first suction pump 42 is connected to an end of the first conduit 45 away from the first water supply tank 41, and the first conduit 45 is communicated with a suction end of the first suction pump 42. The first extraction pump 42 can be fixed on the top surface of the top plate 8 of the building, and the water delivery end of the first extraction pump 42 is connected with a water supply pipe 43.

Referring to fig. 2 and 3, the first water supply pipe 43 may be configured as a tee pipe in the embodiment, and the other two ends of the first water supply pipe 43 correspond to and communicate with the two heat insulation sleeves 3.

Referring to fig. 1 and 2, the water supply pipe one 43 is connected to the air charge pipe one 51, and the air charge pipe one 51 is connected to the inflator 5. In the present embodiment, the inflator 5 may be fixed to the top surface of the roof panel 8 of the building to reduce damage to the inflator 5 in the event of a fire. A one-way valve I44 is arranged on the water supply pipe I43 and is positioned between the access end of the inflation pipe I51 and the extraction pump I42, the flow direction of the one-way valve I44 is that the extraction pump I42 transmits water to the water supply pipe I43, so that gas is prevented from being introduced into one side of the extraction pump I42 in the working process of the inflation pump 5, and meanwhile, the one-way valve is arranged in the inflation pipe I51 to prevent the inflation pump 5 from being inflated by water.

When a fire happens, an operator starts the first extraction pump 42 to extract the stored water of the first water supply tank 41 through the first guide pipe 45, and a water source is conveyed into the two heat insulation sleeves 3 along the first water supply pipe 43 and seeps out from the seepage holes 31, so that water layer protection is formed in the heat insulation sleeves 3 in time, the heat insulation sleeves 3 and the internal water layer exchange heat with the outside, and the protection of the water conveying pipe 1 is improved. After putting out a fire and accomplishing, operating personnel stops to take out pump 42, starts inflator pump 5 and dashes into gas in the inflation tube 51, and gas is by the leading-in heat insulation sleeve 3 of delivery pipe 43 to remain the water source in heat insulation sleeve 3 by a plurality of infiltration hole 31 blowout fast, convenient clearance heat insulation sleeve 3 fast.

Referring to fig. 1 and 2, the high-pressure water supply assembly 2 includes a second water supply tank 21 externally connected with a water source, a mixing tank 6 is arranged on one side of the second water supply tank 21, a second extraction pump 22 is arranged between the second water supply tank 21 and the mixing tank 6, the extraction end of the second extraction pump 22 is communicated with the bottom side wall of the second water supply tank, the water delivery end of the second extraction pump 22 is connected with a second conduit 26, and one end of the second conduit 26, far away from the second extraction pump 22, is communicated with the top surface of the mixing tank 6. The top surface of the mixing box 6 is communicated with a medicine guide pipe 61, and operators can introduce dust suppressant, harmful gas adsorbing agent and the like into the mixing box 6 through the medicine guide pipe 61. The side wall of the bottom of the mixing box 6 is connected with a third guide pipe 69, one end of the third guide pipe 69, which is far away from the mixing box 6, is connected with a third extraction pump 62, and the third guide pipe 69 is communicated with the extraction end of the third extraction pump 62. The third suction pump 62 can be arranged on the top surface of the roof 8 of the building, and the water delivery end of the third suction pump 62 is connected with the second water supply pipe 68.

Referring to fig. 2 and 3, the second water supply pipe 68 in the embodiment of the present invention may be configured as a three-way pipe, and the other two ends of the second water supply pipe 68 correspond to and communicate with the two water pipes 1 one by one.

Referring to fig. 1 and 2, a high-pressure nitrogen gas cylinder 23 is arranged on one side of the mixing box 6, the top end of the high-pressure nitrogen gas cylinder 23 is connected with a second inflation tube 27, and one end, far away from the high-pressure nitrogen gas cylinder 23, of the second inflation tube 27 is connected with a third guide tube 69. The second inflation tube 27 is sequentially provided with a safety valve 25 and a stop valve 24 from one end close to the high-pressure nitrogen cylinder 23 to one end of the third connecting conduit 69, wherein the safety valve 25 can adopt a mechanical opening and closing valve for an operator to open and close flexibly. The stop valve 24 is a one-way valve, namely, the water source flowing to the inflation tube II 27 from the conduit III 69 is stopped.

When a fire occurs, an operator drives the second extraction pump 22 to extract the stored water in the second water supply tank 21 and convey the stored water into the mixing tank 6 through the second guide pipe 26, meanwhile, the dust suppressant, the harmful gas adsorbing agent and the like are introduced into the mixing tank 6 through the chemical guide pipe 61, and after the agents are mixed with water sources, the third extraction pump 62 is driven to extract the mixed water sources and convey the mixed water sources to the water conveying pipe 1 through the third guide pipe 69 and the second water supply pipe 68 and spray the mixed water sources by the plurality of fine water spray nozzles 11. The safety valve 25 and the stop valve 24 are synchronously opened, and the water supply pressure is improved in the high-pressure nitrogen gas stored in the high-pressure nitrogen gas cylinder 23 introduced into the water delivery pipe 1, so that the water supply pressure of the water mist spray head 11 is favorably and quickly improved, and the spraying effect of the water mist spray head 11 is improved.

Referring to fig. 2 and 4, in the embodiment of the present application, the mixing box 6 is a cylinder, for example, a diversion shell 63 is disposed in the mixing box 6, the diversion shell 63 is funnel-shaped as a whole, that is, the diversion shell 63 is closed from its top end to its bottom center, the upper and lower ends of the diversion shell 63 penetrate through and form a buffer channel 631, and the top peripheral wall of the diversion shell 63 is attached to the inner peripheral wall of the mixing box 6. The outer top surface of mixing box 6 is fixed with agitator motor 64, and agitator motor 64's output vertically penetrates in mixing box 6 and with axle center fixedly connected with (mixing) shaft 65, and in the bottom of (mixing) shaft 65 extended to buffering runner 631, the (mixing) shaft 65 was located the axle wall circumference of buffering runner 631 and is provided with a plurality of stirring vane 651, and the stirring vane 651 is kept away from the inner wall of the one end laminating blower inlet housing 63 of (mixing) shaft 65.

When the conflagration takes place, raise dust, foreign particles and toxic gas more in the building, operating personnel can be with suppressing in the leading-in mixing box 6 of dirt agent, harmful gas adsorption medicament etc. by medicine guide tube 61, start agitator motor 64 and rotate, and the mixed water source of medicament is stirred by (mixing) shaft 65 and a plurality of stirring vane 651 when falling along buffering runner 631 and is mixed, improves the mixed effect of medicament and water source. And finally, the third extraction pump 62 is started to extract the water source mixed with the medicament and guide the water source into the water delivery pipe 1, so that the dust suppression and harmful gas adsorption effects of the water mist sprayed by the water mist spray head 11 are further improved.

Referring to fig. 4, a plurality of baffle plates 66 are arranged on the inner wall of the mixing box 6 below the guide shell 63, the baffle plates 66 are longitudinally and sequentially arranged in an opposite and alternating manner, and the baffle plates 66 are inclined downwards. After the medicament mixed water source is guided down by the diversion shell 63, the plurality of baffle plates 66 buffer the water source of the mixed medicament alternately, and the uniform mixing effect of the medicament and the water source is further improved.

Referring to fig. 1, a smoke alarm 7 is installed on the bottom surface of a building roof 8, the smoke alarm 7 is connected with a controller 71 through signals, the controller 71 is fixed on the side wall of a second water supply tank 21, and the controller 71 controls the power on and off of a first suction pump 42, a second suction pump 22 and a third suction pump 62. When a fire disaster occurs, the smoke alarm 7 timely senses rising smoke in a building and timely transmits a signal to the controller 71, the controller 71 further controls the first extraction pump 42 to be started to supply water for the heat insulation sleeve 3, the second extraction pump 22 and the third extraction pump 62 are started to supply water for the water conveying pipe 1 and the water mist nozzles 11, and the water mist nozzles 11 are favorable for timely spraying and extinguishing the fire.

The implementation principle of the automatic water mist fire extinguishing device in the building is as follows: when a fire disaster occurs in a building, the smoke alarm 7 senses rising smoke and transmits a signal to the controller 71, the controller 71 is connected with power supplies of the first drawing pump 42, the second drawing pump 22 and the third drawing pump 62, meanwhile, an operator can lead in a medicament into the mixing box 6 through the medicament guide pipe 61 and start the stirring motor 64, the safety valve 25 and the stop valve 24 are opened, a water source in the first water supply box 41 is filled into the heat insulation sleeve 3 to form protection on the water conveying pipe 1, and simultaneously, a water source in the second water supply box 21 is mixed with the medicament in the mixing box 6 and then is led into the water conveying pipe 1 and sprayed by the water mist nozzles 11 to extinguish the fire.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a thin water smoke automatic fire extinguishing device in building which characterized in that: including being used for along raceway (1) of the interior top installation of building and connecting high-pressure water supply assembly (2) of raceway (1), raceway (1) outside cover is equipped with heat insulating sleeve pipe (3), be connected with a plurality of stretches out on raceway (1) water mist nozzle (11) of heat insulating sleeve pipe (3), heat insulating sleeve pipe (3) are connected with automatic water supply assembly (4).

2. The automatic fire extinguishing device with water mist in the building according to claim 1, characterized in that: the automatic water supply assembly (4) comprises a first water supply tank (41) used for being connected with an external water source, a first extraction pump (42) is connected between the first water supply tank (41) and the heat insulation sleeve (3), and a plurality of water seepage holes (31) are formed in the heat insulation sleeve (3).

3. The automatic fire extinguishing device with water mist in the building according to claim 2, characterized in that: the water delivery end of the first extraction pump (42) and the heat insulation sleeve (3) are connected with a first water supply pipe (43), the first water supply pipe (43) is connected with a first inflation pipe (51), and the first inflation pipe (51) is connected with an inflation pump (5).

4. The automatic fire extinguishing device with water mist in the building according to claim 1, characterized in that: high-pressure water supply subassembly (2) is including the feed tank two (21) that are used for external water source, feed tank two (21) with be connected with extraction pump two (22) between raceway (1), raceway (1) is connected with high-pressure nitrogen gas bottle (23), just high-pressure nitrogen gas bottle (23) with be provided with stop valve (24) between raceway (1).

5. The automatic fire extinguishing device with water mist in the building according to claim 4, characterized in that: a mixing box (6) is connected between the second extraction pump (22) and the water delivery pipe (1), the mixing box (6) is connected with a medicine guide pipe (61) for guiding medicine, and a third extraction pump (62) is connected between the mixing box (6) and the water delivery pipe (1).

6. The automatic fire extinguishing device with water mist in the building according to claim 5, characterized in that: the drug guide pipe (61) is connected with the top surface of the mixing box (6), and the water delivery end of the second extraction pump (22) is connected with the top surface of the mixing box (6);

a flow guide shell (63) is arranged in the mixing box (6), two ends of the flow guide shell (63) are communicated and form a buffer flow channel (631), one end of the buffer flow channel (631) faces to the top surface of the mixing box (6), the other end of the buffer flow channel faces to the bottom surface of the mixing box (6), and the cross section size of the buffer flow channel (631) is gradually reduced from one end facing to the top surface of the mixing box (6) to one end facing to the bottom surface of the mixing box (6);

the top surface of mixing box (6) is fixed with agitator motor (64), the output of agitator motor (64) is used for stretching into with axle center fixedly connected with (mixing) shaft (65) in buffering runner (631), the shaft wall circumference of (mixing) shaft (65) is provided with a plurality of stirring vane (651), just stirring vane (651) laminating kuppe (63) are located inner wall in buffering runner (631).

7. The automatic fire extinguishing device with water mist in the building according to claim 5, characterized in that: the inner wall of the mixing box (6) is provided with a plurality of baffle plates (66), the baffle plates (66) are sequentially and alternately arranged along the falling direction of a water source, and the baffle plates (66) are inclined downwards.

8. The automatic fire extinguishing device with water mist in the building according to claim 1, characterized in that: still including being used for setting up smoke alarm (7) at the interior top of building, smoke alarm (7) are connected with controller (71), just controller (71) control connection high pressure water supply subassembly (2) and automatic water supply subassembly (4).

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