Air exhausting pipe check valve with natural ventilating and speed variable function

A technology of natural ventilation and exhaust ducts, applied in the direction of functional valves, control valves, valve devices, etc., can solve the problems of no gaps, backflow, and loose closure of valve plates and valve bodies, etc., achieving low cost and convenient use , the effect of simple structure
CN1614329AActive Publication Date: 2005-05-11HENAN WUJIAN CONSTR GRP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HENAN WUJIAN CONSTR GRP
Publication Date
2005-05-11

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Abstract

A check valve of exhaust channel with the functions of natural ventilation and speed variation is composed of a jointer for joining the exhaust port of exhaust channel with the flexible pipe of oil soot exhaustor, a valve body in said jointer with an airflow channel having big inlet and small outlet for changing speed, and a flexible valve sheet which is naturally suspended at the air outlet of valve body for covering it.
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Description

Technical field:

[0001] The invention relates to an exhaust duct check valve which is matched with the exhaust duct to prevent backflow of the air flow in the exhaust duct and has the functions of natural ventilation and speed change. Background technique:

[0002] Exhaust duct check valves currently in use are mostly made of steel plates, aluminum plates or engineering plastic plates to prevent the backflow of airflow in the exhaust ducts. What they have in common is rigid bodies. The disadvantage is that when the valve discs adhere After being greasy, it is easy to cause the valve plate and the valve body to be closed tightly; at the same time, the rotating shaft that fixes the valve plate, whether it is set at the upper end or lower end or the middle part of the valve plate, whether it is a horizontal rotating shaft or a vertical rotating shaft, The structural assembly between it and the shaft sleeve and the valve body is also difficult to leave no gap between the valve p...

Claims

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