Fireproof non-returning exhaust valve
A technology of exhaust valve and check piece, which is applied in vertical pipelines, building components, buildings, etc., can solve the problems of lack of fire protection function, and achieve the effect of low cost and preventing fire from spreading
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Embodiment 1
[0022] refer to figure 1 , figure 2 , is a schematic diagram of a structure of a fire prevention check exhaust valve according to an embodiment of the present invention. The fire prevention check exhaust valve in this embodiment is located at the air inlet of the residential common exhaust system. The fire check exhaust valve includes a panel 100 with an air inlet 110, a guide tube 200 located inside the panel 100 and communicated with the air inlet 110, and a guide tube 200 located at the outlet 210 of the guide tube 200 and capable of sealing the guide tube 200-channel normally closed check piece 300. A gravity hammer 400 is disposed on the panel 100 and above the non-return piece 300 , and the gravity hammer 400 is connected to the panel 100 through a fuse 500 . In this embodiment, under normal conditions, when the suction fan exhausts air into the pipeline, the non-return piece 300 opens, and when it stops exhausting the pipeline, the non-return piece 300 falls back in...
Embodiment 2
[0031] refer to image 3 , Figure 4 , is a structural schematic diagram of the fire prevention check exhaust valve of this embodiment. The main difference between this embodiment and Embodiment 1 is that the gravity hammer 400 is replaced by an elastic hammer 410 . When a fire occurs and the fuse is disconnected, the gravity hammer 400 presses the normally closed non-return piece 300 by gravity, and in this embodiment, the elastic hammer 410 presses the normally closed non-return piece 300 by elastic force to cover the guide tube 200 Channels prevent the spread of fire. Figure 4 The middle dotted line represents the open state of the normally closed non-return piece 300 . The similarities will not be repeated.
[0032] Of course, in order to enhance the sealing effect, the gravity hammer 400 and the elastic hammer 410 can also be installed here at the same time.
Embodiment 3
[0034] refer to Figure 5 , Figure 6 , is a structural schematic diagram of the fire check exhaust valve of this embodiment. The difference between this embodiment and Embodiment 1 is that a Venturi effect plate 700 is arranged on the periphery of the guide pipe 200, and its purpose is to make the Venturi effect plate 700 Enclosed with the guide pipe 200 to form a variable pressure zone, in this way, when the pipe ascending airflow passes through, this space produces a pressure variable effect, which can reduce the positive pressure of the air inlet 110 at this place, and even reach a negative pressure state, which plays a fixed role. The structure prevents gas backflow in the pipeline. At the same time, through the action of pressure transformation, the difference between the air supply pressure of the exhaust fan and the pressure value at the air inlet 110 increases, thereby increasing the exhaust volume into the pipeline, and at the same time, the exhaust of the exhaust f...
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