Check fire valve for flue
A fire damper and non-return technology, applied in the direction of control valve, safety valve, balance valve, etc., can solve the problems of not having the forced closing position of the valve plate, the effect of exhausting oil fume is worse, and threatening the life safety of residents.
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[0020] Figure 1-Figure 3 The shown flue non-return fire damper includes a cylindrical oil fume passage formed by a housing 1. The oil fume passage can be a variable diameter passage, and the oil fume passage has opposite air inlets 3 and air outlets 14 (that is, opposite The air inlet channel and the air outlet channel), a mounting plate 2 is provided on the outer wall of the housing 1, and a barrier 15 is provided at one end of the oil fume channel near the air inlet 3. The barrier 15 is an annular body provided on the inner wall of the oil fume channel. The blocking body 15 may also be a boss arranged on the inner wall of the soot passage or convex points arranged at an annular interval along the inner wall of the soot passage. In the oil fume channel near the air inlet 3, there is provided a longitudinal connecting strip 4 that divides the air inlet 3 into two parts. The connecting strip 4 and the blocking body 15 can be integrally arranged, such as figure 2 As shown, the lo...
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