A high sealing smoke exhaust ventilation fire damper

Abstract

The invention discloses a smoke exhaust and ventilation fire resisting damper with high sealing performance. The smoke exhaust and ventilation fire resisting damper comprises a damper body; an executing mechanism is arranged on the damper body, and is connected with a temperature fuse; a plurality of blade fixing grooves are arranged on both the left inside wall and the right inside wall in the damper body; blade shaft sleeves are arranged on the blade fixing grooves; blade shafts are arranged in the two corresponding blade shaft sleeves in an inserting and sleeving manner; blades are arranged on the blade shafts, and are connected through a blade connecting rod; weather strips are fixed on the top surface and the bottom surface in the damper body, and are long strips bent to form obtuse angles; one side of each obtuse angle is fixed on the top surface or the bottom surface in the damper body, and the other side of each obtuse angle is a bevel side; and upper grooves protruding backwards are formed in the upper parts of the blades. After heated, side sealing plates, middle side sealing plates and arc-shaped sealing plates are clung to the blades, so that the sealing effect of the fire resisting damper is improved greatly, and the air leakage rate is reduced.

Description

Technical field: [0001] The invention relates to the technical field of fan equipment, and more specifically relates to a high-sealing smoke exhaust ventilation fire damper. Background technique: [0002] At present, general fire protection valves are welded by Q235 galvanized iron plates after forming. In production, in addition to the problem of good flatness of the iron plate after forming process in the process, there is also the problem of thermal deformation due to welding process, which brings great processing difficulty to the workers who make the product. cannot meet the requirements. Moreover, it will be deformed after being heated, which will cause a larger gap between the blade and the valve body, so that the air leakage of the fire protection valve cannot meet the national standard GB15930-2007. [0003] And what existing fire damper adopts is to be sealed by being fixed with asbestos and other non-combustible strips on the inner wall of the valve body, but it...

AI Technical Summary

Problems solved by technology

During production, in addition to the problem that the flatness of the iron plate after forming process is required in the process, there is also the problem of thermal deformation due to welding process, which brings great processing difficulty to the workers who make the product. can not meet the requirements

Moreover, it will be deformed after being heated, which will cause a larger gap between the blade and the valve body, resulting in the air leakage of the fire protection valve not meeting the national standard GB15930-2007

[0003] Moreover, the existing fire dampers are sealed by fixing non-combustible strips such as asbestos on the inner wall of the valve body. However, the gap between the blades and the elastic deformation cannot be guaranteed, and it cannot be adjusted according to the temperature.

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