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Title: Microprocessors control pipeline pressure

Abstract

This study presents a new concept in pipeline pressure limiting which in the past has been accomplished by pneumatic control equipment using gas from the pipeline as the power source. The concept uses a microprocessor-based system which controls pressure through electro hydraulically actuated valves having numerical solenoids as hydraulic pilots. This concept uses fluid under pressure (either air or hydraulic oil) is supplied by the system pump to a pair of directional control three-way solenoid valves. When deenergized, both valves apply pressure to the cylinders of the valves actuator, locking the position of the valve. When either of the directional valves is energized, fluid is allowed to vent from the appropriate sides of the actuator pistons, moving the connection rod which, in turn, moves the lever and hence the valve through a 90-degree motion. As the fluid leaves the actuator cylinders, it returns to the reservoir (or is vented) through a set of parallel restrictions, each with its own solenoid actuator. In this example, there are four possible paths, one of which is normally open and one of which has no restriction at all. By selectively energizing these solenoids either singly, or in combination, up to seven different rates ofmore » fluid efflux, and, therefore, actuator motion is available.« less

Authors:
Publication Date:
Research Org.:
El Paso Nat Gas Co, Tex
OSTI Identifier:
5463394
Resource Type:
Journal Article
Journal Name:
Oil Gas J.; (United States)
Additional Journal Information:
Journal Volume: 79:50
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; MICROPROCESSORS; NATURAL GAS DISTRIBUTION SYSTEMS; COMPUTERIZED CONTROL SYSTEMS; PRESSURE CONTROL; PIPELINES; COMPUTERS; CONTROL; CONTROL SYSTEMS; ELECTRONIC CIRCUITS; ENERGY SYSTEMS; MICROELECTRONIC CIRCUITS; 032000* - Natural Gas- Transport, Handling, & Storage

Citation Formats

Harris, J L. Microprocessors control pipeline pressure. United States: N. p., 1981. Web.
Harris, J L. Microprocessors control pipeline pressure. United States.
Harris, J L. 1981. "Microprocessors control pipeline pressure". United States.
@article{osti_5463394,
title = {Microprocessors control pipeline pressure},
author = {Harris, J L},
abstractNote = {This study presents a new concept in pipeline pressure limiting which in the past has been accomplished by pneumatic control equipment using gas from the pipeline as the power source. The concept uses a microprocessor-based system which controls pressure through electro hydraulically actuated valves having numerical solenoids as hydraulic pilots. This concept uses fluid under pressure (either air or hydraulic oil) is supplied by the system pump to a pair of directional control three-way solenoid valves. When deenergized, both valves apply pressure to the cylinders of the valves actuator, locking the position of the valve. When either of the directional valves is energized, fluid is allowed to vent from the appropriate sides of the actuator pistons, moving the connection rod which, in turn, moves the lever and hence the valve through a 90-degree motion. As the fluid leaves the actuator cylinders, it returns to the reservoir (or is vented) through a set of parallel restrictions, each with its own solenoid actuator. In this example, there are four possible paths, one of which is normally open and one of which has no restriction at all. By selectively energizing these solenoids either singly, or in combination, up to seven different rates of fluid efflux, and, therefore, actuator motion is available.},
doi = {},
url = {https://www.osti.gov/biblio/5463394}, journal = {Oil Gas J.; (United States)},
number = ,
volume = 79:50,
place = {United States},
year = {1981},
month = {12}
}