High-precision variable air volume venturi valve

Abstract

The invention discloses a high-precision variable air volume venturi valve which comprises a valve body shell, a valve element arranged in the valve body shell, an air volume adjusting mechanism and a moving rod connected with the air volume adjusting mechanism, and the moving rod is sleeved with the valve element; the air volume adjusting mechanism comprises a mounting plate fixed to the valve body shell, an air valve actuator mounted on the mounting plate, a connecting spline, a connecting rod connected with the connecting spline and a transmission rod rotationally mounted on the mounting plate, and one end of the transmission rod penetrates through the valve body shell to be connected with the moving rod; the other end of the transmission rod is fixedly connected with the connecting rod; and an output gear ring of an air valve actuator is arranged on the connecting spline in a sleeving mode, and the air valve actuator is used for driving the connecting spline and the connecting rod to rotate. The rotating process is controlled through the air valve actuator, and the rotating angle of the air valve actuator corresponds to the moving position of the valve element, so that the opening degree of the valve element is controlled, and accurate adjustment of the air volume is achieved.

Description

technical field [0001] The invention relates to the field of venturi valves, in particular to a high-precision variable air volume venturi valve. Background technique [0002] Venturi valves are widely used in air supply and exhaust pipes to adjust the air volume. The Venturi valve mainly controls the air volume through the cooperation of a Venturi-shaped shell, the internal valve core and the valve stem. The Venturi valve is widely used because it combines a mechanical pressure-independent regulator, which can extend the airflow control to the highest level. It is used in some biological product production plants, toxic and harmful, chemical laboratories and biosafety laboratories that require negative pressure control. [0003] However, the Venturi valve in the prior art has the following problems: 1. The adjustment process cannot be accurately controlled, resulting in low adjustment accuracy; 2. The air volume adjustment structure is complicated, inconvenient to adjust, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-precision variable air volume Venturi valve to solve the problem in the prior art that the Venturi valve cannot accurately control its air volume adjustment process, resulting in low adjustment accuracy; The air volume adjustment structure of the inner valve is complex and inconvenient to adjust

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