Vale blade sealing structure and air valve

Abstract

The invention discloses a valve blade sealing structure and an air valve. The valve blade sealing structure comprises valve blades. The upper ends and the lower ends of the valve blades are provided with lap joint parts. The directions of the lap joint parts of every two adjacent valve blades are opposite. Each lap joint part is composed of a folding start face obliquely extending out and a folding stop face reversely folded back. A flexible sealing strip is arranged on one side of one end of the lap joint. A pressing strip is arranged at the upper end of the sealing strip. The pressing strip and the sealing strip are fixed to the valve blades through rivets in an inserting manner. The lower end of the sealing strip is squeezed by and attached to the folding stop faces of the two corresponding adjacent lap joint parts. The valve blade sealing structure is simple and convenient to install; and when the air valve is closed, the flexible sealing strip is deformed under the acting force of the lap joint parts of the valve blades so as to adaptively fill the connecting gaps between the lap joint parts of the valve blades, and therefore the leakage amount of air valves such as an air volume regulating valve, a fire valve, a smoke exhausting fire valve and a smoke exhausting valve is controlled to be reduced as much as possible.

Description

technical field [0001] The invention relates to the field of air valves and accessories thereof, in particular to a valve blade sealing structure and an air valve using the valve blade sealing structure. Background technique [0002] At present, the air volume leakage of air volume control valves, fire dampers, smoke exhaust dampers, smoke exhaust valves and other air valves used in central air conditioning or other ventilation systems cannot meet the national standard during use, and there will be gaps when the valve blades are closed. , the amount of leakage cannot be controlled. Especially for large-sized valve blades, it is difficult to guarantee the processing accuracy of straightness and flatness after forming, and the air leakage at the overlapping parts between the valve blades will be greater. More seriously, when a fire or other emergency occurs, the air valve in the ventilation system needs to be closed tightly, but the air leakage between the valve blades cannot...

AI Technical Summary

Problems solved by technology

[0002] At present, the air volume leakage of air volume control valves, fire dampers, smoke exhaust dampers, smoke exhaust valves and other air valves used in central air conditioning or other ventilation systems cannot meet the national standard during use, and there will be gaps when the valve blades are closed. , the amount of leakage cannot be controlled

Especially for large-sized valve blades, it is difficult to guarantee the machining accuracy of straightness and flatness after forming, and the air leakage at the overlapping parts between the valve blades will be greater

More seriously, when a fire or other emergency occurs, it is necessary to close the air valve in the ventilation system, but the air leakage between the valve blades cannot completely block the fire or smoke, which poses a huge threat to personal and property safety. could have more serious consequences

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