Check valve with double fireproof valves for smoke flue
A technology of check valve and fire damper, applied in the direction of valve details, control valves, valve devices, etc., can solve the problems of fire prevention and smoke prevention, backflow, no smoke upward function, etc., and achieve the effect of expanding the space
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[0024] Example 1:
[0025] Reference Figure 1-Figure 6 , A double-valve check valve for flue fire prevention, comprising a main valve body 1 and an auxiliary valve body. The auxiliary valve body is placed in the main valve body 1 and matched and assembled 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. The outside of the cavity is provided with a square protrusion near the flue pipe. The smoke outlet of the cavity is set in an arch shape, and the bottom edge of the arch shape is set The support plate 10 for receiving the auxiliary valve body is provided with a manual valve opening rod 11 connected to 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 changes from a circle to a square shape and an auxiliary valve body 2 connected to the smoke inlet 3. The auxiliary valve body 2 is composed of two righ...
Example Embodiment
[0031] Example 2:
[0032] The inlet of the rear end of the main valve body 1 and the exhaust pipe of the smoke extractor are arranged in a circular shape, and the remaining part to the front end is arranged in a square structure. The upper part of the fire damper 8 is also arranged in a square structure, and the rest is the same as in Embodiment 1.
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