Ventilation valve

Abstract

A ventilation valve, comprising a cylindrical valve body (1), a gear box (2), a plurality of fan-shaped vanes (3) and a drive device (4), the gear box (2) being arranged in the center of the valve body (1), and a geared mechanism being provided inside the gear box (2). The drive device (4), by means of a geared drive mechanism, cause the vanes (3) to rotate in a same direction, each around its own central shaft; the vanes (3) are arranged within the valve body (1) in a uniform distribution; the geared mechanism comprises a first central gear (23) and a second central gear (24) fitted on a same supporting shaft (25); between the first central gear (23) and the second central gear (24) are provided a plurality of gears, one each of which is arranged at the end of one of said central shafts which extends to within the gear box (2), each of said gears engaging with both said first central gear (23) and said second central gear (24). Also arranged within the valve body (1) is one or a plurality of airflow meters (6), the distance between the central axis of each of said one or plurality of airflow meters (6) and the central axis of the valve body (1) is different. The present ventilation valve precisely controls airflow and is safe and reliable, while featuring improved geared mechanism security and reduced wear and tear, thus prolongs the service life of the ventilation valve.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is the US National Stage Entry under 35 U.S.C. 371 based on and claiming the benefit of PCT Application No. PCT / CN2016 / 080990, filed May 4, 2016, which claims the benefit of Chinese Patent Application Serial No. 201610200092.7, filed Mar. 31, 2016.INCORPORATION BY REFERENCE[0002]The disclosures of PCT Application No. PCT / CN2016 / 080990, filed May 4, 2016, and Chinese Patent Application Serial No. 201610200092.7, filed Mar. 31, 2016, are incorporated by reference herein for all purposes as if presented in their entirety.TECHNICAL FIELD[0003]The present invention relates to a ventilation valve.BACKGROUND ARTS[0004]The ventilation valve is a type of regulation valve with a simple structure and wide application. It can be used as a control device to control or shutoff gas flow rates, which can be applied to ventilation and environmental protection projects across various industries such as chemical industry, building ma...

AI Technical Summary

Benefits of technology

[0017]As above, the present invention achieves a small external size, a safe and reliable structure, which effe...

Problems solved by technology

However, since the structure of the geared mechanisms are relatively simple in the prior art, vibrations easily occur during the operation of the motor, if the vibration amplitude is large, gear misalig...

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