Curtain type regulating air valve

Abstract

The invention relates to a regulating air valve for opening and closing an exhaust air flareout of an underground railway tunnel, in particular to a curtain type regulating air valve which can effectively prevent gas fume from leaking when a fire disaster happens in the tunnel. The regulating air valve comprises a framework and a reelable roller with a curtain, wherein both ends of the reelable roller are fixed at the upper end of the framework through bearing blocks; the bottom end of the framework is provided with a guide wheel bearing block; a curtain guide shaft is arranged below the framework; the curtain guide shaft is provided with a curtain guide wheel and a guide bearing block; the guide bearing block is matched with the guide wheel bearing block; the curtain guide wheel is provided with a tensioning belt connected with the curtain in a matching way; and a transmission shaft with a speed reducer and a motor is arranged on the same side of the reelable roller and the curtain guide shaft. The regulating air valve can increase the area of an air outlet during ventilation, has low air leaking rate when closed, can effectively control the smoke leakage, makes personnel evacuate in time and reduces losses of life and property.

Description

technical field [0001] The invention relates to a regulating air valve for opening and closing the air exhaust flaring of a subway tunnel, in particular to a curtain type regulating air valve which can effectively prevent smoke from leaking when a fire occurs in the tunnel. Background technique [0002] At present, the smoke exhaust regulating damper used in the subway tunnel generally uses a multi-electric disc-type split regulating damper, which is composed of dozens of blades assembled together, and assembled in groups, and this damper enters and exits The air area is small, there are many parts, and the assembly requirements are excellent. A little negligence will result in poor sealing and a large amount of air leakage. When a fire occurs in the tunnel, the air valve will be closed. Due to the large number of blades, it cannot play the role of smoke sealing. And cause the loss of life and property caused by a large amount of smoke leakage. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the existing air valve blades, such as large number of blades, poor sealing performance, large air leakage, and a large amount of smoke leakage in the event of a fire, the present invention provides a curtain-type regulating air valve, which can not only increase the air volume during ventilation. The area of ​​the air outlet is small, and the air leakage is small when it is closed, which can effectively control the leakage of smoke, make the personnel evacuate in time, and reduce the loss of life and property

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