Zero-resistance flue check valve
A check valve and flue technology, applied in the direction of control valve, valve device, functional valve type, etc., can solve problems such as endangering physical and mental health, pollution, affecting the use effect of check valve, etc., to achieve zero resistance and straight exhaust, The effect of improving efficiency
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[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0019] Such as Figure 1-2 As shown, the zero-resistance flue check valve of the present invention includes a valve body 1, which can be composed of a square shell 100 and an upper cover 101 located at one end of the square shell 100, wherein an air hole 2 is opened in the middle of the upper cover 101, And a section extends outward from the air hole 2 to form an external connection 102 , and an upper cover level 107 can be provided on the upper cover 101 as required. The present invention is provided with a monolithic valve 3 at the vent hole 2. One side of the valve 3 extends outward for a section and passes through the side wall of the valve body to bend obliquely. The width of the upper and lower ends of the bent part is not equal. Install door shaft 4 at the bent end, such as Figure 3-4 As shown, since the width of the upper end of the...
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