High-frequency single-valve-plate air seal butterfly-shaped air valve

Abstract

The invention relates to a high-frequency single-valve-plate air seal butterfly-shaped air valve. The high-frequency single-valve-plate air seal butterfly-shaped air valve comprises a valve body, a valve shaft arranged in the valve body in the radial direction, a valve plate arranged on the valve shaft and coaxially arranged with the valve body, and an actuator arranged outside the valve body and used for driving the valve shaft to rotate, wherein flanges are arranged at the two ends of the valve body correspondingly; annular check rings are arranged on the inner wall of the valve body and located on the two sides of the valve shaft correspondingly; the diameter of the valve plate is smaller than the inner diameter of the annular check rings; annular sealing pieces are arranged on the edges of the two sides of the valve plate correspondingly; when the valve plate rotates to be in a closed state, the two annular sealing pieces are located on the same sides of the two annular check rings correspondingly and attached to the two annular check rings correspondingly, and an annular cavity is formed; an inflation pipeline communicating with the annular cavity is arranged outside the valve body; and an air seal valve is arranged on the inflation pipeline. The size of the annular cavity is small, and therefore the inflation time is very short, rapid sealing can be better achieved after the valve is closed, and the high-frequency single-valve-plate air seal butterfly-shaped air valve is suitable for the high-frequency switch switching work condition.

Description

technical field [0001] The invention relates to the technical field of air valves, in particular to a high-frequency single valve plate air-sealed butterfly air valve. Background technique [0002] In the VOCs treatment technology, the waste gas pipeline is used to transport the waste gas to the VOCs treatment device; in the process of transporting the VOCs gas, there are higher requirements for the sealing of the pipeline valve; such as an air-tight double-plate type disclosed in the prior art 201921455952.7 Damper, when the double-layer valve plate is in the closed state, the double-layer valve plate, the inner wall of the valve and the double-layer retaining ring between the two form a sealed space, and the cold air enters the airtight space through the intake port, making the inside The gas pressure of the valve is greater than the gas pressure in the valve pipeline, so only the air in the double plate is allowed to leak to both sides of the valve plate, and the gas in t...

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Problems solved by technology

[0002] In the VOCs treatment technology, the waste gas pipeline is used to transport the waste gas to the VOCs treatment device; in the process of transporting the VOCs gas, there are higher requirements for the sealing of the pipeline valve; such as an air-tight double-plate type disclosed in the prior art 201921455952.7 Damper, when the double-layer valve plate is in the closed state, the double-layer valve plate, the inner wall of the valve and the double-layer retaining ring between the two form a sealed space, and the cold air enters the airtight space through the intake port, making the inside The gas pressure of the valve is greater than the gas pressure in the valve pipeline, so only the air in the double plate is allowed to leak to both sides of the valve plate, and the gas in the pipeline is not allowed to leak from one side of the valve plate to the other side, so as to achieve the air sealing effect of harmful gases; now Although the existing technology has improved the sealing performance of the valve, due to the large sealing space, the inflation time is long, and the rapid sealing effect cannot be achieved, so the high-frequency switching effect is poor.

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