Drive device and valve comprising the same

Patent metadata

Field	Value
Publication number	US-9541926-B2
Application number	US-201314437817-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 22, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

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.

First claim

The invention claimed is:

1. 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.

2. The valve according to claim 1 , wherein the flow control device comprises a clack valve arranged at the another end of the drive shaft, the valve further comprising a valve opening arranged in the valve body between the inlet chamber and the outlet chamber; wherein the clack valve matches with the valve opening, and the clack valve is movable relative to the valve opening to define opening and closing states of the valve.

3. The valve according to claim 1 , wherein the second connecting pipeline fluidly connects the vent and the downstream pipeline of the main pipeline.

4. The valve according to claim 1 , wherein the first connecting pipeline is connected to the shell of the sensing chamber at a first position, wherein the vent is located vertically above the first position.

5. The valve according to claim 4 , wherein the first connecting pipe is arranged between the shell and a first portion of the downstream pipeline of the main pipeline, wherein the second connecting pipeline is arranged between the vent and a second portion of the downstream pipeline of the main pipeline, and 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.

6. The valve according to claim 5 , further comprising an air exhausting device connected with the vent, the air exhausting device configured to control the gas exhausted from the sensing chamber.

7. The valve according to claim 6 , wherein the air exhausting device comprises a bulkhead or a vent valve.

8. The valve according to claim 4 , wherein the first connecting pipeline is arranged between the shell and a first portion of the upstream pipeline of the main pipeline, wherein the second connecting pipeline is arranged between the vent and a second portion of the upstream pipeline of the main pipeline and 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.

9. The valve according to claim 8 , further comprising an air exhausting device connected with the vent, the air exhausting device configured to control the gas exhausted from the sensing chamber.

10. The valve according to claim 9 , wherein the air exhausting device comprises a bulkhead or a vent valve.

11. The valve according to claim 4 , further comprising an air exhausting device connected with the vent, the air exhausting device configured to control the gas exhausted from the sensing chamber.

12. The valve according to claim 11 , wherein the air exhausting device comprises a bulkhead or a vent valve.

13. 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.

14. The valve according to claim 13 , wherein the flow control device comprises a clack valve arranged at the another end of the drive shaft, the valve further comprising a valve opening arranged in the valve body between the inlet chamber and the outlet chamber, wherein the clack valve is movable relative to the valve opening to define opening and closing states of the valve.

15. The valve according to claim 13 , further comprising an air exhausting device connected with the vent, the air exhausting device configured to control the gas exhausted from the sensing chamber.

16. The valve according to claim 15 , wherein the air exhausting device comprises a bulkhead or a vent valve.

17. 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

Assignees

• Emerson Process Man Regulator Technologies Inc

Inventors

• Huo Ping
• Shi Yanbo
• Qin Xiaojuan

Classifications

• G05D16/0655

  using one spring-loaded membrane · CPC title

• F16K31/1266

  one side of the diaphragm being acted upon by the circulating fluid · CPC title

• G05D16/02

  Modifications to reduce the effects of instability, e.g. due to vibrations, friction, abnormal temperature, overloading or imbalance · CPC title

• Y10T137/7793

  With opening bias [e.g., pressure regulator] · CPC title

• G05D16/08 Primary

  Control of liquid pressure · CPC title