Fluid control system with autonomously controlled valves

• US 6,450,254 B1
• Filed: 06/30/2000
• Issued: 09/17/2002
• Est. Priority Date: 06/30/2000
• Status: Expired due to Term

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Hoyle, Scott Baxter, McSweeney, Michael Anthony
• Primary Examiner(s): Ford, John K.
• Application Number:
  US09/608,829
• Time in Patent Office: 809 Days
• Field of Search: 165/200, 165/295, 165/282, 165/294, 165/70, 165/101, 165/11.1, 165/41, 73/40, 73/405.R
• US Class Current: 165/200
• CPC Class Codes: B63B 13/00 Conduits for emptying or ballasting; Self-bailing equipment; Scuppers draining means for hatches B63B19/26; centrifugal bilge-water separators B04; arrangements of installations for treating ballast water B63J4/002; pipes in general F16L
• CPC Class Codes: B63B 43/02 reducing risk of capsizing or sinking by means of watertight doors in bulkheads B63B43/24
• CPC Class Codes: B63B 43/10 by improving buoyancy amphibious cycles B60F3/0038
• CPC Class Codes: G01M 3/26 by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
• CPC Class Codes: G05D 7/0641 using a plurality of throttling means G05D7/067 takes precedence

Abstract

A plurality of autonomously controlled valves in a fluid distribution system are interconnected by a data communication network. The system also includes fluid flow sensors which report to the system by way of the network. The autonomous controllers include information as to their neighbors or environment sufficient to determine malfunctions such as a leak or break in an associated path, and can take autonomous action. The actions are established by the autonomous controllers regardless of the existence of a connection to the network, so that even if the network connection fails or is damaged, the valve can still respond to its own flow sensor with predetermined actions.

Claims

1. A circulating fluid system for tending to cause a flow of fluid through at least one fluid affecting device of a set of fluid affecting devices, where any fluid affecting device of said set of fluid affecting devices may fail, said system comprising:

a plurality of fluid affecting devices, each including a first port and a second port connected by a path for the flow of said fluid between said first and second ports;

a first fluid path extending from a first fluid bifurcation to said first port of a first fluid affecting device of said set of fluid affecting devices, said first fluid path including a first software-controllable valve and a first flow sensor;

a second fluid path extending from said first bifurcation to said first port of a second fluid affecting device of said set of fluid affecting devices, said second fluid path including a second software-controllable valve and a second flow sensor;

a third fluid path extending from said first port of said first fluid affecting device to said first port of said second fluid affecting device, said third fluid path including a third software-controllable valve and a third flow sensor;

a sink for said fluid;

a second bifurcation coupled to said sink;

a fourth flow sensor in a fourth fluid flow path extending from said second port of said first fluid affecting device to said second bifurcation;

a fifth flow sensor in a fifth fluid flow path extending from said second port of said second fluid affecting device to said second bifurcation;

a sixth fluid flow path coupling said first bifurcation to a source of pressurized fluid;

a communication network interconnecting said flow meters and valves for providing a path for the flow of information relating to the state of each valve and the flow rate sensed by each flow sensor;

an independent first software program associated with said first valve, said first software program being preloaded with information about said third and fourth fluid flow paths, for receiving from said network current fluid flow information associated with at least said third and fourth flow sensors, for summing the flows associated with said third and fourth fluid flow paths to thereby form a first summed fluid flow, and for comparing said first summed fluid flow with the flow through said first flow sensor, and for closing said first valve for closing off said first fluid flow path when said first summed flow is not equal to said flow through said first flow sensor;

an independent second software program associated with said second valve, said second software program being preloaded with information about said third and fifth fluid flow paths, for receiving from said network current fluid flow information associated with at least said third and fifth flow sensors, for summing the flows associated with said third and fifth flow paths to form a second summed fluid flow, and for comparing said second summed fluid flow with the flow through said second flow sensor, and for closing said second valve for closing off said second flow path when said second summed flow is not equal to said flow through said second flow sensor.

2. A circulating fluid system for tending to cause a flow of fluid through at least one heat exchanger of a set of heat exchangers, where any heat exchanger of said set of heat exchangers may fail, said system comprising:

a plurality of heat exchangers, each including a first port and a second port connected by a path for the flow of said fluid between said first and second ports;

a first fluid path extending from a first fluid bifurcation to said first port of a first heat exchanger of said set of heat exchangers, said first fluid path including a first software-controllable valve and a first flow sensor;

a second fluid path extending from said first bifurcation to said first port of a second heat exchanger of said set of heat exchangers, said second fluid path including a second software-controllable valve and a second flow sensor;

a third fluid path extending from said first port of said first heat exchanger to said first port of said second heat exchanger, said third fluid path including a third software-controllable valve and a third flow sensor;

a sink for said fluid;

a second bifurcation coupled to said sink;

a fourth flow sensor in a fourth fluid flow path extending from said second port of said first heat exchanger to said second bifurcation;

a fifth flow sensor in a fifth fluid flow path extending from said second port of said second heat exchanger to said second bifurcation;

a sixth fluid flow path coupling said first bifurcation to a source of pressurized fluid;

a communication network interconnecting said flow meters and valves for providing a path for the flow of information relating to the state of each valve and the flow rate sensed by each flow sensor;

an independent first software program associated with said first valve, said first software program being preloaded with information about said third and fourth fluid flow paths, for receiving from said network current fluid flow information associated with at least said third and fourth flow sensors, for summing the flows associated with said third and fourth fluid flow paths to thereby form a first summed fluid flow, and for comparing said first summed fluid flow with the flow through said first flow sensor, and for closing said first valve for closing off said first fluid flow path when said first summed flow is not equal to said flow through said first flow sensor;

an independent second software program associated with said second valve, said second software program being preloaded with information about said third and fifth fluid flow paths, for receiving from said network current fluid flow information associated with at least said third and fifth flow sensors, for summing the flows associated with said third and fifth flow paths to form a second summed fluid flow, and for comparing said second summed fluid flow with the flow through said second flow sensor, and for closing said second valve for closing off said second flow path when said second summed flow is not equal to said flow through said second flow sensor.