Check sealing structure for smoke exhaust equipment

Abstract

Disclosed is a check sealing structure for smoke exhaust equipment. The check sealing structure comprises a valve body, a discharge barrel is connected with the inner side of the valve body, a turnover check plate is arranged at the smoke outlet end of the discharge barrel, elastic sealing pieces are connected to the check plate, and are matched with an end opening of the smoke outlet end of the discharge barrel, and the elastic sealing pieces are in a folded shape in the direction perpendicular to the plane formed by the contact trails of the elastic sealing pieces and the end opening of the discharge barrel. Due to the fact that when the elastic sealing pieces and the discharge barrel are matched, the elastic sealing pieces are in the folded shape in the exhaust direction, when air flow blows to the check plate and enables the check plate to rotate, the elastic sealing pieces begin to deform, the deformation is larger than that of arc-shaped elastic sealing pieces in the prior art, relative movement is formed between the elastic sealing pieces and the end opening of the discharge barrel, stress is concentrated at the position at the moment, opening is quite easy under drive of the inertia and blowing force of the check plate, and therefore the elastic sealing pieces and the check plate are easy to blow open, smoke is immediately exhausted while being generated, and therefore indoor air quality is guaranteed.

Description

technical field [0001] The invention relates to a non-return sealing structure for smoke exhaust equipment, which is used in cooperation with oil fume exhaust equipment and exhaust equipment to discharge indoor smoke to the outside in time and can play a check effect to prevent outdoor air from entering the room. Background technique [0002] The existing check sealing structure for smoke exhaust equipment includes a valve body, and a smoke exhaust cylinder connected with the smoke equipment is located in the valve body. During installation, the valve body is connected to the outside through the exhaust pipe. A non-return plate is connected to the upper shaft of the discharge cylinder, and an elastic seal with a curved section is installed on the non-return plate. When the exhaust gas equipment is not working, the non-return plate and the elastic seal fall on the upper port of the discharge cylinder. , preventing the backflow of gas. When the flue gas exhaust equipment is w...

AI Technical Summary

Problems solved by technology

Due to the tight fit between the elastic seal and the port of the discharge cylinder, especially when it is used for exhausting oil fume, the elastic seal and the port of the discharge cylinder are often stuck by the oil fume, and often cannot be blown open, and the smoke cannot be discharged

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