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Fluid loss, damage prevention and control system

  • US 4,730,637 A
  • Filed: 02/20/1987
  • Issued: 03/15/1988
  • Est. Priority Date: 02/20/1987
  • Status: Expired due to Fees
First Claim
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1. A fluid loss and damage control system for a fluid distribution system comprising:

  • (a) system control means for receiving input data on fluid flow and pipe temperatures in the fluid distribution system, processing said data and providing output control signals to valves in the distribution system responsive to programmed limit conditions, said control means comprising a programmable controller settable for operating various parameter conditions simultaneously or independently;

    (b) flow sensing means in the fluid supply line for sensing flow in the line and providing an input signal to the controller proportional to the rate of flow in the line for controlling fluid flow through the distribution system;

    (c) temperature sensing means for sensing the temperature at points along the fluid distribution system of the facility providing a signal to the controller when the temperature at a point in the system approaches freezing;

    (d) fluid supply control means for controlling the fluid supply to the distribution system, said fluid supply control means located adjacent to the main supply shut-off valve and said fluid supply control means operated by a signal provided by the controller;

    (e) auxiliary control means for controlling a gas distribution system said auxiliary control means being controlled by signals provided by the controller, said auxiliary control means including a gas heater control means;

    (f) drain means for draining the distribution system, said drain means installed at desired points of the distribution system and controlled by signals provided by the controller;

    (g) means for providing an audible and visual alarm when the system controller senses an out-of-limit condition of flow or temperature in the fluid distribution system, so that when the control means receives a flow signal from the flow sensing means for a period which exceeds a programmed limit it transmits a signal operating said fluid supply control means to a closed position and said heater control means to an off position for shutting off the gas supply to the gas distribution system, and when the system control means receives a signal from the temperature sensing means which indicates that a freezing condition is present it operates said fluid supply control means to a closed position for shutting off the fluid flow to the distribution system and simultaneously operates said heater control means to an off position for shutting off the gas supply to the gas distribution system and said drain means to an operative position for allowing the system to drain and,(h) manual over-ride means for maintaining said fluid and gas distribution systems and drain means operative in the event of electrical power failure.

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