Axial flow type control valve with gear rack transmission belt pre-tightening valve seat structure

Abstract

The invention relates to the technical field of valves, and discloses an axial flow type control valve with a gear rack transmission belt pre-tightening valve seat structure. The axial flow type control valve comprises a valve body, a valve seat, a valve core transmission shaft, a transmission gear and a valve rod transmission shaft, a pre-tightening clamping sleeve device is arranged between the valve body and the valve seat to eliminate gaps among axial parts, and the up-down displacement of the valve rod transmission shaft perpendicular to a flow channel is converted into the displacement (90-degree conversion) of the valve core transmission shaft parallel to the flow channel in a gear and rack transmission mode. Mechanical vibration and noise caused by high-speed fluid can be reduced by arranging a pre-tightening clamping sleeve structure, by adopting a single-gear and double-rack symmetrical structure, during use, symmetrical distribution is free of eccentricity, transmission is stable, transmission torque loss is small, the movement direction of a valve element is in a pressure balance state, and the torque of the valve is not affected by medium force in the adjusting process.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an axial-flow control valve with a rack-and-pinion drive belt pre-tightening valve seat structure. Background technique [0002] Axial flow valve is a special equipment installed on the pipeline to regulate the flow of the conveying medium. After the medium enters from the input port, the flow channel area of ​​the medium will gradually shrink, and the flow rate of the medium will increase. The media outlet flows out. In the prior art, when the adjustment pressure difference is large, the sealing surface of the valve seat is prone to erosion and cavitation at the moment of opening, and the valve opening and closing torque is relatively large, which leads to the opening, closing, and movement of the valve. Affected by medium force, adjust the accuracy. Contents of the invention [0003] In view of the above problems, an axial flow control valve with a rack and pinion drive belt ...

AI Technical Summary

Problems solved by technology

[0002] Axial flow valve is a special equipment installed on the pipeline to regulate the flow of the conveying medium. After the medium enters from the input port, the flow channel area of ​​the medium will gradually shrink, and the flow rate of the medium will increase. The media outlet flows out. In the prior art, when the adjustment pressure difference is large, the sealing surface of the valve seat is prone to erosion and cavitation at the moment of opening, and the valve opening and closing torque is relatively large, which leads to the opening, closing, and movement of the valve. Affected by medium force, adjustment accuracy

Images