Self-weight closed fully-sealed fan valve

Abstract

The invention discloses a self-weight type closed fully-sealed fan valve which comprises an air valve barrel and is characterized in that an acute angle is formed by two end faces of the air valve barrel, a pair of air doors, namely a left air door and a right air door, is arranged at the air outlet end of the air valve barrel, the left air door and the right air door are hinged to a door shaft located on one diameter part of the air outlet end of the air valve barrel, and the two ends of the door shaft are located in a gap adjusting limiting base. The opening and closing functions are completely achieved through exhaust pressure and the dead weight of the air doors, and no other power configuration is needed, so that energy is saved, and action is sensitive; and seamless sealing is conducted on the end face of an air valve in a static state, so that the protection grade of the air valve to a fan is improved, configuration is flexible, the requirement for exhaust system engineering of fans with different power can be met, the structure is stable and reliable, and the service life is long.

Description

technical field [0001] The invention relates to fan manufacturing technology, in particular to a self-weight closed fully-sealed fan valve. Background technique [0002] The fan valve is a component used to protect the safety of the fan and its equipment. When the pressure in the fan and equipment rises abnormally to a certain value (the opening pressure of the safety valve), the safety valve can automatically open and discharge the medium to prevent pressure Continue to rise, when the pressure in the fan and equipment drops to a certain value (reseat pressure of the safety valve), the safety valve will automatically close. There are two main ways to open and close traditional safety valves. One is to use a spring with less rigidity. This structure has the defect of not being able to move accurately and sensitively under low pressure; the other is an electric control type. An electric fan valve, comprising a valve body, a rotating shaft pierced on the valve body at both end...

AI Technical Summary

Problems solved by technology

In addition, in the fan valve, whether it is a single door or a double door, as long as the hinge or door pivot structure is adopted, since there are two hinged shafts (cylindrical parts) where the two leaves are hinged to each other, the gap between the two dampers or the single door There must be a certain gap between the air door and the door frame to prevent the door frame from being squeezed by the boundary position of the air door, so as to ensure the normal opening of the hinge or the relative hinge structure together with the air door. Even if the gap is small, the air door cannot be completely closed. valve port

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