Pump controller for controlling pumps connected in tandem

• US 20070056630A1
• Filed: 04/06/2006
• Published: 03/15/2007
• Est. Priority Date: 09/15/2005
• Status: Active Grant

• Current Assignee: Wildfire Environmental, Inc.
• Original Assignee: Ansul Canada Limited
• Inventors: Moskun, Peter
• Granted Patent: US 7,758,315 B2
• Time in Patent Office: Days
• US Class Current: 137/87.10
• CPC Class Codes: F04D 15/0209 responsive to a condition of the working fluid F04D15/029 takes precedence
• CPC Class Codes: G05D 7/0682 using a plurality of flow sources
• CPC Class Codes: Y10T 137/2496 Self-proportioning or correlating systems

Abstract

A system for automatically controlling a pumping unit used in fire suppression comprises a pumping unit, a water flow sensor and a pump controller. The pumping unit has a pump with a suction inlet configured to receive water from an upstream pumping unit and an engine to run the pump. The water flow sensor senses water flow into the suction inlet of the pumping unit. The pump controller receives a water flow sensor signal from the water flow sensor and controls an on/off state of the engine based on the water flow sensor signal.

Claims

1. A system for automatically controlling a pumping unit used in fire suppression, comprising:

a pumping unit comprising a pump having a suction inlet configured to receive water from an upstream pumping unit and an engine to run the pump;

a water flow sensor for sensing water flow into the suction inlet of the pumping unit; and

a pump controller for receiving a water flow sensor signal from the water flow sensor, the pump controller controlling an on/off state of the engine based on the water flow sensor signal.

2. The system of claim 1, the pumping unit further comprising:

a discharge outlet for discharging water out of the pump; and

a water pressure switch for sensing water flow out of the discharge outlet, the pump controller receiving a water pressure switch signal from the water pressure switch and further controlling the on/off state of the engine based on the water pressure switch signal.

3. The system of claim 1, the pumping unit further comprising an oil pressure switch for detecting a level of oil pressure within the engine, the pump controller receiving an oil pressure switch signal from the oil pressure switch and further controlling the on/off state of the engine based on the oil pressure switch signal.

4. The system of claim 1, the pumping unit further comprising a vibrational sensor for detecting a level of vibration created by the engine, the pump controller receiving a vibration sense signal from the vibrational sensor and further controlling the on/off state of the engine based on the vibration sense signal.

5. The system of claim 1, the engine further comprising an ignition switch for setting the on/off state and a starting component for starting the engine, the pump controller sending a start engine signal to the engine when the water flow sensor signal indicates water flow into the suction inlet, the start engine signal comprising at least one of an ignition on signal and a starting component activation signal.

6. The system of claim 1, further comprising:

the pumping unit further comprising;

a discharge outlet for discharging water out of the pump; and

at least one of a water pressure switch, an oil pressure switch and a vibrational sensor, wherein the water pressure switch senses water flow out of the discharge outlet, wherein the oil pressure switch detects a level of oil pressure within the engine, and wherein the vibrational sensor detects vibrations created by the engine; and

the pump controller receiving at least one signal from at least one of the water pressure switch, oil pressure switch, and vibrational sensor, the pump controller further controlling the on/off state of the engine based on the at least one signal.

7. The system of claim 1, the pump controller further comprising a microprocessor, the microprocessor inhibiting the engine from starting when the water flow sensor signal indicates water flow below a predetermined level at the suction inlet.

8. The system of claim 1, the pump controller attempting to start the engine for one of a predetermined number of times and a predetermined length of time, the pump controller inhibiting further attempts to start the engine until a reset condition is satisfied.

9. The system of claim 1, the pump controller further comprising a transmitter for communicating at least one of the on/off state, failure information, and status information with respect to the pumping unit to a receiver unit.

10. A system for controlling a pumping unit used in fire suppression, comprising:

means for supplying water to a suction inlet of a pumping unit;

a water flow sensor for detecting the water in the suction inlet of the pumping unit; and

a microprocessor for controlling the operation of the pumping unit based on at least a signal from the water flow sensor indicating whether water is available at the suction inlet, the microprocessor outputting a start signal to start the pumping unit when the water flow sensor indicates water is available, the microprocessor inhibiting the pumping unit from running when the water flow sensor indicates water is not available.

11. The system of claim 10, further comprising at least one of a water pressure switch, an oil pressure switch and a vibrational sensor, wherein the water pressure switch indicates whether water is being output by the pumping unit, wherein the oil pressure switch indicates a level of oil pressure within an engine for running the pumping unit, and wherein the vibrational sensor indicates a level of vibration created by the engine which indicates whether the engine is operating, the microprocessor determining whether the pumping unit is running based on signals from the water pressure switch, the oil pressure switch and the vibrational sensor.

12. The system of claim 10, further comprising means for determining whether the pumping unit is running and outputting water, the microprocessor turning the pumping unit off when no water is being output.

13. The system of claim 10, the start signal to start the pumping unit further comprising a voltage level being output by the microprocessor for a predetermined period of time, the voltage level being received by a starting component within the pumping unit.

14. The system of claim 10, wherein the microprocessor further determining that the pumping unit is not operating, the microprocessor inhibiting the outputting of the start signal to start the pumping unit until after the water flow sensor indicates that water flow is not available to the pumping unit.

15. The system of claim 10, further comprising means for electrically starting the pumping unit.

16. A method for automatically controlling a pumping unit used in fire suppression, comprising:

connecting a discharge outlet of an upstream pumping unit with a suction inlet of a pumping unit;

monitoring a water flow sensor signal to determine if water is available at the suction inlet of the pumping unit; and

outputting a start signal to start an engine which runs the pumping unit when the water flow sensor indicates that water is available at the suction inlet.

17. The method of claim 16, further comprising:

monitoring at least one of a water pressure switch signal, an oil pressure switch signal and a vibration sense signal, wherein the water pressure switch signal indicates whether water is being output from the pumping unit, wherein the oil pressure switch signal indicates a level of oil pressure within the engine with respect to a predetermined level, and wherein the vibration sense signal indicates a level of vibration detected proximate the engine with respect to a predetermined vibration level; and

determining whether the pumping unit is running based on at least one of the water pressure switch signal, the oil pressure switch signal, and the vibration sense signal.

18. The method of claim 16, further comprising:

the outputting step further comprising outputting the start signal for one of a predetermined number of times and a predetermined time period;

determining if the pumping unit is running; and

waiting for the water flow sensor signal to indicate that water is not available before repeating the outputting step.

19. The method of claim 16, further comprising outputting a signal to indicate that the pumping unit is running, the signal activating at least one of a strobe and a horn.

20. The method of claim 16, wherein when the pumping unit is running, the method further comprising:

monitoring signals within the pumping unit; and

turning the pumping unit off when the signals indicate at least one of a level of water output from the pumping unit which is less than a predetermined water output level, a level of oil pressure within the engine running the pumping unit which is less than a predetermined oil pressure, and a level of sensed vibration proximate the engine which is less than a predetermined level of vibration.