Axial-flow type adjusting valve

Abstract

The invention discloses an axial-flow type adjusting valve which mainly comprises a valve body, an electric head, an adjusting controller, a connecting rod crank arm mechanism, a pressure sensor and a flow sensor, wherein the electric head is mounted in the valve body, the connecting rod crank arm mechanism is assembled in the valve body, and the pressure sensor and the flow sensor are mounted on an output tube. Output pressure and flow fluctuation signals are acquired on line by electronic integration technology and inputted to the adjusting controller for calculation, adjusting instructions are transmitted to the electric head, the electric head drives an adjusting rotation shaft to rotate, a valve spool is pushed by the connecting rod crank arm mechanism, opening of an adjusting valve port is changed to adjust output flow and pressure, and the output flow and the output pressure can be automatically adjusted and tend to be stable. The axial-flow type adjusting valve has the outstanding advantages of simple structure, convenience in mounting and using, high adjusting precision, high reaction speed, running safety and reliability, high automated control level and good conveying medium stability, and is particularly suitable for being mounted and used on a pipeline requiring high conveying medium dynamic stability.

Description

technical field [0001] The invention relates to an axial-flow regulating valve, which belongs to the technical field of automatic control equipment for transmission and distribution pipe network systems, and is particularly suitable for installation and use on pipelines with high requirements on the dynamic stability of the transmission medium in the petrochemical industry. Background technique [0002] We know that the current control valve products are divided into internal flow channel structure, there are conventional control valves with "S" shaped flow channels in the valve body cavity and axial flow control valves coaxial with the pipeline axis. Objectively speaking, conventional control valves have the advantages of simple structure and low manufacturing cost, and are widely used. However, because the displacement direction of the spool of conventional control valves is perpendicular to the pipeline axis and the medium flows along an "S" shape in the valve body Road m...

AI Technical Summary

Problems solved by technology

Although the current axial flow regulating valves have been maturely used in the petrochemical industry for many years, we have also found in the long-term research and development and actual production of axial flow regulating valves: due to the fact that the pipeline network will be affected by many factors during the actual operation The influence causes the output pressure and output flow to fluctuate, while the current axial flow control valve simply uses the motor to push the spool to adjust the opening of the valve port to control the flow and pressure.

Objectively speaking, this control method has technical defects in actual operation, such as "slow response to transmission pipeline network control, low adjustment accuracy, and low level of automatic control", which is why the current axial flow control valve products need to be further improved. and perfect place, the present invention will solve this technical problem exactly

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