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Methods and apparatus to determine a position of a valve

A user, scheduled operation technique used in the field of determining the position of valves, which can solve problems such as inefficiency

Active Publication Date: 2010-03-24
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach can be inefficient if, for example, operator error causes several equalization attempts to be performed

Method used

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  • Methods and apparatus to determine a position of a valve
  • Methods and apparatus to determine a position of a valve
  • Methods and apparatus to determine a position of a valve

Examples

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Embodiment Construction

[0013] Many known fluid control or delivery systems include valves that are not fully accessible after installation. For example, valves may be installed within the tank to control the flow of pressurized fluid such as liquid propane. Such internal valves can be designed to operate automatically without external control and depending only or mainly on system conditions such as pressure values. Although such internal valves are protected from certain hazards (such as mechanical damage from external impacts), the limited access to such valves often makes it difficult or impossible to determine the valve's position or state (ie, operating state).

[0014] Rather, the example devices and methods described herein provide operators with status information about components of a fluid control process or delivery system that would otherwise remain unknown to the system operator and / or any other personnel or instrumentation associated with the system . More specifically, the examples ...

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Abstract

Methods and apparatus to indicate a position of a valve (100) are described. An example apparatus includes a first pressure sensor (104) to detect an inlet, pressure of a valve, a second pressure sensor (106) to detect an outlet pressure of the valve, and a controller (126) operatively coupled to the first pressure sensor and the second pressure sensor to determine a position of the valve corresponding to one of a plurality of predetermined operational states of the valve.

Description

[0001] This application claims the benefit of US Provisional Application Serial No. 60 / 944,285, filed June 15, 2007, which is hereby incorporated by reference in its entirety. technical field [0002] The present disclosure relates generally to valves and, more particularly, to methods and apparatus for determining the position of valves. Background technique [0003] Valves are commonly used in process fluid handling systems and fluid transfer systems to manipulate the flow of fluids. In general, valves regulate flow by selectively allowing or preventing fluid from reaching its destination. Fluid pressure associated with the system often affects valve operation. For example, valves can be opened or closed to manipulate the pressure at different points or stages of the process. In other examples, the operation of the valve may depend on the pressure value at a specified point in the system. [0004] One example is an internal valve that opens or closes based on the pressu...

Claims

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Application Information

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IPC IPC(8): F16K37/00
CPCF16K37/0066Y10T137/8326Y10T137/0379Y10T137/86485Y10T137/8225Y10T137/86944
Inventor 庄殷仓露君凡健
Owner FISHER CONTROLS INT LLC