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Automatic leakage detection system for pipelines carrying fluids

  • US 4,066,095 A
  • Filed: 02/17/1976
  • Issued: 01/03/1978
  • Est. Priority Date: 02/17/1976
  • Status: Expired due to Term
First Claim
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1. In combination in a system for monitoring the rate of flow of a fluid being transported through a conduit, a plurality of valve means located at various points along the conduit for controlling the rate of flow of said transported fluid, a plurality of flow measurement probes located at different points along the conduit, the locations of said plurality of flow measurement probes characterized in that neighboring pairs of probes are located one upstream and one downstream from a particular valve means, each probe characterized in that it produces an output signal which is precisely indicative of the rate of flow in the conduit at the position in the conduit occupied by the probe, means for comparing the output signal from one probe with the output signal from another probe, remote control means for selectively operating said valve means, said remote control means characterized in that it is selectively responsive to any specified difference in said output signals being produced by a neighboring pair of probes, said remote control means further characterized in that a particular valve means is operated by a particular remote control signal initiated in response to said specified difference in output signals produced by a particular pair of probes, said remote control means further characterized in that it selectively initiates the closing of a pair of valve means located one upstream and one downstream from the probe which has indicated an abrupt decrease in flow from its nearest upstream neighbor, whereby the section of the conduit containing said probe is isolated and sealed off by the closing of the said pair of valve means.

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