Auxiliary opening mechanism for flue check valve

Abstract

The invention provides an auxiliary opening mechanism for a flue check valve, and belongs to the technical field of pipeline structures. The auxiliary opening mechanism solves the problem that valve plates cannot be opened after long-term use in the prior art. The auxiliary opening mechanism for the flue check valve comprises a shell and a plurality of valve plates; an annular sealing baffle edgeis arranged in the shell; the valve plates are hinged in the shell; the edges of the valve plates can be attached to or can be separated from the annular sealing baffle edge; and the shell is providedwith an air inlet end and an air outlet end. The auxiliary opening mechanism is characterized by comprising swing rods; an installation cavity is formed in each valve plate; the swing rods are arranged in the installation cavities in a swinging mode; openings I and openings II are formed in the sides, close to the air inlet end, of the valve plates; an elastic pad is arranged on each opening I; one ends of the swing rods make contact with the elastic pads; the openings II are formed in the edges of the valve plates; and when the elastic pads deform to drive one ends of the swing rods to swing, the other ends of the swing rods can penetrate out of the openings II to abut against the annular sealing baffle edge. The auxiliary opening mechanism has the advantage of enhancing the opening force of the valve plates.

Description

technical field [0001] The invention belongs to the technical field of pipeline structures and relates to an auxiliary opening mechanism for a flue check valve. Background technique [0002] In kitchens that use longitudinal public flue gas ducts, in order to prevent oily fumes from flowing back into the kitchen, a check valve is generally installed between the integrated stove or range hood and the public flue gas duct to block them. Most of the non-return valves still have oil fume backflow and poor smoke exhaust, which cannot be eradicated. [0003] The sealing working principle of the existing check valve: the valve disc in the check valve that plays a sealing role is opened by the exhaust wind force, and when the exhaust wind force disappears, it is closed under the action of the valve disc's self-gravity and return spring force. General principle analysis will find that the opening force and closing force in this structure are mutually contradictory and a pair of acti...

AI Technical Summary

Problems solved by technology

Long-term use of this common flue exhaust check valve will still cause the windshield to stick to the shell, and the windshield cannot be opened under the same wind force

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