Multiple-blade closed air valve

Abstract

The invention relates to a multiple-blade closed air valve which comprises a square valve body, a plurality of blades and sealing rings, wherein rows of openings are formed in sequence in the square valve body, and the end part of each opening is arc-shaped; the blades are correspondingly arranged in the openings through first fixing components, and the end parts of all the blades are arranged to be arc-shaped, and are matched with the openings; and the sealing rings are arranged on the outer sides of the blades through second fixing components in a surrounding manner, and are in contact with the inner wall of the square valve body. The multiple-blade closed air valve provided by the invention can effectively solve the problem of leakage hazards between the blades, between the blades and the square valve body, and at the right-angle end parts of the blades, and has a good sealing effect.

Description

technical field [0001] The invention relates to an airtight damper, in particular to a square multi-blade airtight damper, which is mainly applicable to process exhaust pipes of manufacturing enterprises such as semiconductors, microelectronics and liquid crystal panels. Background technique [0002] Process exhaust pipes used in manufacturing companies such as semiconductors, microelectronics, and liquid crystal panels, due to their large diameters and hoisting above buildings, cannot be completely sealed by precision casting and machining like water pipe valves. Such as figure 1 As shown, the existing large-diameter airtight air valve generally adopts a multi-blade linkage structure after considering the problem of excessive single-axis force load. But this kind of structure has the unavoidable hidden danger of leakage described below. [0003] 1. There is a hidden danger of leakage between two adjacent blades 2: the existing large-diameter airtight air valve generally u...

AI Technical Summary

Problems solved by technology

However, this type of structure has the following unavoidable hidden dangers of leakage

[0003] 1. There is a hidden danger of leakage between two adjacent blades 2: the existing large-diameter airtight air valve generally uses V-shaped groove buckles to realize the connection between the blades, but this type of structure cannot achieve a sealing effect , but can only be used to adjust the air volume

[0004] 2. There is a hidden danger of leakage between the blades 2 and the square valve body 1: the multi-blade linkage structure will inevitably lead to too many contact points between the rotating shafts 3 and the square valve body 1, resulting in leakage

[0005] 3. There are hidden dangers of leakage at the right angles of the square valve body 1: Due to the limitations of the structure of the square valve body 1 itself, it is difficult to seal at the top of each right angle, which will cause leakage

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