Vent valve

Abstract

The invention provides a vent valve which comprises a cylindrical valve body, a gear box, a plurality of fan-surface-shaped blades and a driving device. The gear box is arranged in the center of the valve body, and the gear box is internally provided with a gear mechanism; the driving device drives the gear mechanism so as to drive the blades to rotate in the same direction around center shafts of the blades correspondingly, and the blades are arranged in the valve body in an evenly-distributed mode; the gear mechanism comprises a first center gear and a second center gear which are arranged on the same supporting shaft in a sleeving mode, and a plurality of gears arranged at one ends, stretching into the gear box, of all the center shafts are arranged between the first center gear and the second center gear; all the gears are simultaneously engaged with the first center gear and the second center gear, and the valve body is further internally provided with one or more air flow rate instruments; and the distances from the axes of the one or more air flow rate instruments to the axis of the valve body are not equal. The vent valve can accurately control the ventilation quantity, is safe and reliable, improves safety of the gear mechanism, effectively reduces service wear and prolongs the service life.

Description

technical field [0001] The invention relates to a ventilation valve. Background technique [0002] Ventilation valve is a regulating valve with simple structure and wide application. It can be used in ventilation and environmental protection projects in various industries such as chemical industry, building materials, power stations, etc., as a control device for regulating or cutting off the flow of gas medium. [0003] In the prior art, the gear mechanism in the ventilation valve is used to control the rotation of the blades. However, the gear structure in the prior art is relatively simple. Since vibration is likely to occur during the operation of the motor, if the vibration amplitude is large, the gear structure is easy to In the case of gear misalignment or jamming, not only the gears are easily damaged, but also the motor is easily damaged, the service life of the ventilation valve is shortened, and the noise is relatively large. Contents of the invention [0004] ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the gear mechanism in the ventilation valve is used to control the rotation of the blades. However, the gear structure in the prior art is relatively simple. Since vibration is likely to occur during the operation of the motor, if the vibration amplitude is large, the gear structure is easy to In the case of gear misalignment or jamming, it is easy to cause damage not only to the gear, but also to the motor, which reduces the service life of the ventilation valve and makes the noise louder.

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