Check valve with double fireproof valves for smoke flue
A check valve, fire damper technology, applied in valve details, control valve, valve device and other directions, can solve the problems of fire prevention and smoke prevention, backflow, no smoke upward function, etc., to achieve the effect of expanding space
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Embodiment 1
[0025] refer to Figure 1-Figure 6 , a double-valve check valve for flue fire prevention, including a main valve body 1 and an auxiliary valve body, the auxiliary valve body is placed in the main valve body 1 and matched with the main valve body 1 as a whole.
[0026] The main valve body 1 is a circular cavity with two small ends and a large middle. There is a square protrusion near the flue pipe outside the cavity. The smoke outlet of the cavity is set in an arch shape. The supporting plate 10 receiving the auxiliary valve body is provided with a manual valve opening rod 11 connected with the main valve body 1 on the right side of the front end of the main valve body 1 .
[0027] The auxiliary valve body is composed of a smoke inlet 3 that gradually changes from a circle to a square and an auxiliary valve body 2 connected to the smoke inlet 3. The auxiliary valve body 2 is composed of two right-angled surfaces holding the sealing valve 5 and holding the fire damper 8. The sq...
Embodiment 2
[0032] The smoke inlet at the rear end of the main valve body 1 and the exhaust pipe interface of the hood are arranged in a circular shape, and the remaining part is arranged in a square structure from the front end.
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