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Emergency shutdown valve diagnostics using a pressure transmitter

A technology of transmitters and shut-off valves, which is applied in the direction of flow control of electrical devices, instruments, valve devices, etc., and can solve problems such as poor instantaneous clarity

Inactive Publication Date: 2007-02-21
ROSEMOUNT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One disadvantage of current diagnostic systems using pressure transmitters that provide pressure readings over time to a microcomputer is that the data acquired and stored by the microcomputer has relatively poor temporal clarity with respect to events (typically occurring within seconds) Spend

Method used

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  • Emergency shutdown valve diagnostics using a pressure transmitter
  • Emergency shutdown valve diagnostics using a pressure transmitter
  • Emergency shutdown valve diagnostics using a pressure transmitter

Examples

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Embodiment Construction

[0013] figure 1 is a schematic diagram of a pressure transmitter connected to a slam-shut valve. Pressure transmitter 100 is fluidly connected to pressurized gas in line 102 , which controls the operation of slam-shut valve 104 . The pressurized gas is provided by source 106 . Solenoid valve 108 is shown interposed between slam shut valve 104 and source 106 . The solenoid valve 108 is energized via a control line 110 when actuation of the valve 104 is desired. To reduce the reaction time of the valve 104, one or more quick discharge valves 112 as known in the art may be provided.

[0014] In the past, pressure readings from transmitter 100 were transmitted to a microcomputer (not shown) that stored a plurality of such readings over time. The microcomputer can then construct a graph plotting the pressure measured by the transmitter 100 over time. As briefly mentioned above, this approach has significant disadvantages. Specifically, the resolution achievable by the microco...

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Abstract

An emergency shut down valve is operated using a pressurized fluid. A pressure transmitter is operably coupleable to the source of pressurized fluid and is configured to receive an indication relative to emergency shut down valve diagnostics. The pressure transmitter responsively captures pressure readings relative to the source of pressurized fluid for a selected duration. In some embodiments, the pressure transmitter may perform diagnostics upon the captured data. In other embodiments, the captured data is provided to an external device for analysis.

Description

technical field [0001] The present invention relates to the diagnosis of emergency shutdown valves. Background technique [0002] Emergency shut-off valves are designed to return a process, such as an industrial process like oil refining, to a safe state if certain pre-specified operating limits are exceeded. Slam shut valves can take any of a variety of forms such as gate, butterfly, rotary or ball valves. Emergency valves typically operate using a pressurized fluid source. One method of operation involves an actuator, using hydraulic or pneumatic pressure, to hold the valve in its normal position, eg, the open position. When the safety valve is to be closed, hydraulic or pneumatic pressure is released and a metal spring or other mechanism closes the valve. In the case of a double acting actuator, the medium controlling the actuator is redirected to close the valve. The hydraulic or pneumatic application is usually controlled by one or more electrically controlled solen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02F16K37/00G05D7/06
CPCF16K37/0091F16K37/0075G05B23/0286G05B23/0229Y10T137/7761
Inventor 埃夫伦·埃尔于雷克
Owner ROSEMOUNT INC