High-performance regulating valve with floating valve base

Abstract

The invention discloses a high-performance regulating valve with a floating valve base. The high-performance regulating valve comprises a valve body, a valve rod and a valve plate, wherein a press plate installing groove is formed in one end of the valve body, a positioning press plate is arranged in the press plate installing groove, a medium through hole is formed in the middle of the positioning press plate, a seal seat installing groove is formed in the inner wall face of the medium through hole, a floating seal seat for sealing the valve plate is installed in the seal seat installing groove, a first seal ring is arranged at the end, deviating from the valve plate, of the floating seal seat, a first regulating gap is reserved between the first seal ring and the inner wall face of the seal seat installing groove, and the floating seal seat radially floats in the first regulating gap. A self-seal structure is arranged on the floating seal seat. By adopting the technical scheme, the high-performance regulating valve is reasonable in structural design, simple in structure, good in sealing performance, not prone to leakage, long in service life, easy to operate and maintain and high in practicability.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a high-performance regulating valve with a floating valve seat. Background technique [0002] In the traditional regulating valve, the valve stem is fixedly connected with the valve plate. When the pressure in the valve body is high, the valve stem will be subjected to the scouring force of the medium, resulting in deformation and vibration, and the valve plate will be sealed with the deviation of the valve stem. If it is not strict, the accuracy and motion precision of the valve plate movement will deteriorate; more often, the valve stem and the drive shaft of the actuator are usually not on the same axis after the valve is assembled, and there is a large error. When the valve stem is connected to the drive shaft After being fixed, the valve stem will have a certain deflection, which not only affects the flexibility of the valve stem itself, but also greatly affects the accuracy ...

AI Technical Summary

Problems solved by technology

[0002] In the traditional regulating valve, the valve stem is fixedly connected with the valve plate. When the pressure in the valve body is high, the valve stem will be subjected to the scouring force of the medium, resulting in deformation and vibration, and the valve plate will be sealed with the deviation of the valve stem. If it is not strict, the accuracy and motion precision of the valve plate movement will deteriorate; more often, after the valve is assembled, the valve stem and the drive shaft of the actuator are usually not on the same axis, and there is a large error. When the valve stem is connected to the drive shaft After being fixed, the valve stem will have a certain deflection, which not only affects the flexibility of the valve stem itself, but also greatly affects the accuracy and precision of the valve core movement, which will eventually lead to poor sealing and leakage , short service life, troublesome maintenance operations, poor practicability

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