Safe escape system for closed airflow channel in middle of building member
A technology of closed passages and building components, which is applied in the field of personnel escape systems, and can solve the problems of not completely eliminating the dilution of flue gas, loss of personnel and property, and low speed of flue gas outlet.
Active Publication Date: 2013-12-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
[0005] 1. The dilution of flue gas is not completely eliminated. Most of the flue gas still exists in the building, and this part of the flue gas will also cause loss of personnel and property
[0006] 2. The flue gas dilution effect does not directly depend on the power of the exhaust fan, that is, the greater the exhaust fan exhaust volume, the more effective it is. Because of the suction force of the exhaust fan, a negative pressure will be formed in the building, that is, the building will The pressure inside the building is higher than that of the outside, in this case the smoke exhaust fan will not be able to completely extract the smoke from the embarrassing situation in the building
However, due to the turbulence and random fluctuation of the flue gas, this makes the flue gas itself different from the wind speed of each nozzle.
As a result, the stairwell smoke prevention system only has a blocking rate of 70-80% (volume percentage) of the smoke, so the remaining 20-30% (volume percentage) of the smoke will enter the smoke protection area of the previous patent application
[0010] 2. The previous application cannot rule out the smoke passing through the "jet" nozzle and hitting the jet area. On the contrary, due to the action of multiple jet nozzles up and down, the diffusion of smoke passing through the jet area will be accelerated
There are three pairs of six jet nozzles in the earlier application for the smoke prevention system. Through later research and practice, we found that the technical improvement design of the earlier application increases the initial investment funds, manufacturing difficulty and operating costs of the system.
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[0066] Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the scope of protection of the present invention.
[0067] Comply with the above technical scheme, as shown in Figure 1 and figure 2 shown. Firstly, the ratio of the area at the entrance of the second nozzle to the area at the exit is 1:5. The air speed ratio is 5:1. Because the air supply speed is directly proportional to the nozzle area. This makes it possible to meet the above requirements when the area of the inlet of the second nozzle is equal to that of the inlet of the first nozzle (the areas of the outlet and inlet of the first nozzle are equal). Then when the area of the first nozzle is 30m×0.1m, the area of the second nozzle is 30m×0.5m. The size of the first sta...
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The invention discloses a safe escape system for a closed airflow channel in the middle of a building member. The system comprises a first static pressure box, a first nozzle, a second nozzle, a third nozzle, a second static pressure box, a fourth nozzle, a fifth nozzle, a sixth nozzle, a ventilation pipeline and a fan. The system is characterized in that the first nozzle, the second nozzle and the third nozzle are connected with the first static pressure box, the fourth nozzle, the fifth nozzle and the sixth nozzle are connected with the second static pressure box, the first static pressure box and the second static pressure box are connected by virtue of the ventilation pipeline, and the ventilation pipeline is connected with the fan. In the safe escape system for the closed airflow channel in the middle of the building member, due to a unique design of the system, six groups of air flow which mutually clash can be generated, piston flow is generated by clash among the air flow, thus smoke in a special area can be removed, a safe and clean channel can be formed in the building member, and finally a clean and safe living channel can be created for personnel.
Description
technical field [0001] The invention relates to a personnel escape system, in particular to a safety escape system for an airflow closed channel in the middle of a building component. Background technique [0002] A large amount of smoke will be produced after a fire, and high-temperature smoke is the main cause of death in a fire. Since the flue gas is at a higher temperature than the environment, its density will be lower than that of air. The low smoke density compared to the surrounding air creates a buoyant force which causes the smoke to move upwards. When the flue gas moves upwards and hits the ceiling, the flue gas that touches the ceiling later will push the flue gas that touched the ceiling before. This results in a horizontal movement of the smoke along the ceiling, which smoke studies have shown to be very dangerous as it carries the smoke to various places in the building elements. [0003] Studies have shown that for building elements or multi-storey buildin...
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IPC IPC(8): F24F7/06F24F9/00
Inventor李安桂高然郝鑫鹏雷文君邱国志
OwnerXI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY