Drive device and valve comprising the same
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorsPing Huo, Yanbo Shi, Xiaojuan Qin
Life of this patent
Estimating the term…
Abstract
A drive device and a valve including the drive device. The drive device senses the pressure of a working medium and generates a drive force to control the flow of the working medium. The drive device includes a sensing part with a chamber and a drive shaft. Vents and an air exhausting device are arranged on the chamber. The drive device and the valve including such a drive device can exhaust air entering the chamber along with the working medium out of the chamber by the vents on the chamber thereby optimizing the performance of the drive device and the valve and helping to keep the valve operating in a stable manner.
Claims20
A valve adapted to be connected with a main fluid pipeline to control the pressure in the main fluid pipeline, the valve comprising:
- a drive device;
- and
- a valve body connected to the drive device;
- wherein the valve body comprises an inlet chamber and an outlet chamber, the inlet chamber adapted to be connected to an upstream pipeline of the main pipeline, and the outlet chamber adapted to be connected with a downstream pipeline of the main pipeline, the valve further comprising a flow control device arranged between the inlet chamber and outlet chamber, the flow control device configured to control a flow of a working medium in the valve body, and
- wherein the drive device comprises a sensing chamber and a drive shaft, the sensing chamber comprising a membrane and a shell, the drive shaft having one end connected to the membrane and another end connected to the flow control device, the drive device further comprising a vent arranged on the shell and configured to exhaust gas from the working medium out of the sensing chamber;
- a first connecting pipeline connected to the shell of the sensing chamber;
- and
- a second connecting pipeline connected to the shell of the sensing chamber, the second connecting pipeline fluidly connecting the vent and one of the downstream pipeline and the upstream pipeline of the main pipeline,
- wherein the membrane is configured to sense the pressure in the sensing chamber via the first connecting pipeline, and the membrane is configured to drive the drive shaft to move based on the sensed pressure.
A valve adapted to be connected with a main fluid pipeline to control the pressure in the main fluid pipeline, the valve comprising:
- a drive device;
- and
- a valve body connected to the drive device;
- wherein the valve body comprises an inlet chamber and an outlet chamber, the inlet chamber adapted to be connected to an upstream pipeline of the main pipeline, and the outlet chamber adapted to be connected with a downstream pipeline of the main pipeline, the valve further comprising a flow control device arranged between the inlet chamber and outlet chamber, the flow control device configured to control a flow of a working medium in the valve body,
- wherein the drive device comprises a sensing chamber and a drive shaft, the sensing chamber comprising a membrane and a shell, the drive shaft having one end connected to the membrane and another end connected to the flow control device, the membrane configured to sense the pressure in the sensing chamber and drive the drive shaft to move based on the sensed pressure, the drive device further comprising a vent arranged on the shell;
- a first connecting pipeline connected to the shell of the sensing chamber at a first position, wherein the vent is located vertically above the first position, and wherein the first connecting pipe is arranged between the shell and a first portion of the downstream pipeline of the main pipeline;
- and
- a second connecting pipeline arranged between the vent and a second portion of the downstream pipeline of the main pipeline, wherein the second portion of the downstream pipeline of the main pipeline is located downstream of the first portion of the downstream pipeline of the main pipeline.
A valve adapted to be connected with a main fluid pipeline to control the pressure in the main fluid pipeline, the valve comprising:
- a drive device;
- and
- a valve body connected to the drive device;
- wherein the valve body comprises an inlet chamber and an outlet chamber, the inlet chamber adapted to be connected to an upstream pipeline of the main pipeline, and the outlet chamber adapted to be connected with a downstream pipeline of the main pipeline, the valve further comprising a flow control device arranged between the inlet chamber and outlet chamber, the flow control device configured to control a flow of a working medium in the valve body,
- wherein the drive device comprises a sensing chamber and a drive shaft, the sensing chamber comprising a membrane and a shell, the drive shaft having one end connected to the membrane and another end connected to the flow control device, the membrane configured to sense the pressure in the sensing chamber and drive the drive shaft to move based on the sensed pressure, the drive device further comprising a vent arranged on the shell;
- a first connecting pipeline connected to the shell of the sensing chamber at a first position, wherein the vent is located vertically above the first position, and wherein the first connecting pipeline is arranged between the shell and a first portion of the upstream pipeline of the main pipeline;
- and
- a second connecting pipeline arranged between the vent and a second portion of the upstream pipeline of the main pipeline;
- wherein the second portion of the upstream pipeline of the main pipeline is located downstream of the first portion of the upstream pipeline of the main pipeline.
Dependencies are inferred from the claim text.