Sewage pump blockage detection
AssigneeRetroflo Limited
InventorLaundon Andy
Life of this patent
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Abstract
A method of monitoring a pump which operates to pump sewage from a wet well in which the current drawn by the pump is detected along with the speed of operation of the pump and the wet well level. The detected values are compared with stored values in a look up table to determine whether the pump is blocked.
Claims36
A method of monitoring a pump operable to pump sewage from a wet well comprising the steps of:
- detecting the current drawn by the pump;
- detecting the speed of operation of the pump;
- detecting the wet well level;
- and
- comparing each of the detected values with stored values in a look up table to determine whether the pump is blocked.
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A method as claimed in any preceding claim wherein the look up table comprises upper and/or lower threshold values for each parameter and wherein in order to determine that the pump is blocked, any two out of the three parameters or all three parameters may need to fall outside said threshold levels.
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A control unit for a pump operable to pump sewage from a wet well, the control unit comprising:
- current detection means;
- pump speed detection means;
- wet well level detection means;
- memory means operable to store a look up table of current, pump speed and wet well level values;
- and
- a processor operable to compare each of the detected current, speed and level values with values stored in the look up table to determine whether the pump is blocked.
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A pump operable in accordance with a method comprising the steps of
- detecting the current drawn by the pump;
- detecting the speed of operation of the pump;
- detecting the wet well level;
- and
- comparing each of the detected values with stored values in a look up table to determine whether the pump is blocked.
A pump incorporating a control unit comprising:
- current detection means;
- pump speed detection means;
- wet well level detection means;
- memory means operable to store a look up table of current, pump speed and wet well level values;
- and
- a processor operable to compare each of the detected current, speed and level values with values stored in the look up table to determine whether the pump is blocked.
A sewage pumping station incorporating a pump operable in accordance with a method comprising the steps of
- detecting the current drawn by the pump;
- detecting the speed of operation of the pump;
- detecting the wet well level;
- and
- comparing each of the detected values with stored values in a look up table to determine whether the pump is blocked.
A sewage network incorporating one or more pumping stations incorporating a pump operable in accordance with a method comprising the steps of
- detecting the current drawn by the pump;
- detecting the speed of operation of the pump;
- detecting the wet well level;
- and
- comparing each of the detected values with stored values in a look up table to determine whether the pump is blocked.
Dependencies are inferred from the claim text.