Automatic Initiation of Priming Sequence for Metering Pumps

Inactive Publication Date: 2019-03-14
MILTON ROY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a method for operating a metering pump to transfer fluid from one tank to another. The pump is activated for a set amount of time and then raised to its maximum capacity to fully prime the system. This allows the pump to actively inject fluid into the process tank. Overall, this method ensures effective pump operation and efficient fluid transfer.

Problems solved by technology

In some instances, diaphragm metering pumps may be subject to a loss of prime condition where the tubing is not filled with liquid, and air or gas has built up in the cavity.
During a loss of prime condition, the pressure vacuum in the tubing may be lost and the fluid may reverse flow from the tubing back into the source tank.
This may particularly occur in low duty cycle pumping applications or if the pump is turned off for an extended amount of time.
However, this re-priming requires manual intervention, and may be time consuming and may result in under treating the process fluid.

Method used

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  • Automatic Initiation of Priming Sequence for Metering Pumps
  • Automatic Initiation of Priming Sequence for Metering Pumps
  • Automatic Initiation of Priming Sequence for Metering Pumps

Examples

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Embodiment Construction

[0039]Referring now to FIG. 1A, an exemplary system using a metering pump is described. Metering pump system (10) for pumping a specified volume of liquid in a specified time includes a storage tank (2), a metering pump (50), and a process fluid tank (8). The metering pump (50) is fluidly coupled with the storage tank (2) by suction tubing (4), and the metering pump (50) is fluidly coupled with the process fluid tank (8) by injection tubing (6). Accordingly, the metering pump (50) can be operated to pump fluid from the storage tank (2) to the process fluid tank (8), as shown in FIG. 1B, in a specified time at a desired flow rate. The initial priming sequence of the pump (50) is the process of filling the tubing (4, 6) with fluid to a primed condition shown in FIG. 1B. Typically, this process takes several pumping cycles to fill the tubing (4, 6) adequately prior to being able to inject fluid into the process fluid tank (8). Although any type of metering pump can be incorporated into...

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Abstract

Metering pumps are typically used to move a specified volume of liquid in a specified time to provide an accurate flow rate. A recurring automatic priming function is provided for operating such a metering pump by running the pump for a short duration and periodically thereafter. This may maintain fluid in the pumping system such that the pump is automatically in a primed configuration.

Description

CROSS REFERENCE TO RELATED INFORMATION[0001]This application claims the benefit of U.S. Provisional Patent Application No. 62 / 558,476, filed Sep. 14, 2017, titled Automatic Initiation of Priming Sequence for Metering Pumps, the contents of which are hereby incorporated herein in its entirety.TECHNICAL FIELD[0002]The present disclosure is directed to an apparatus and method to automatically initiate a priming sequence for a metering pump.BACKGROUND OF THE INVENTION[0003]Metering pumps are typically used to move a specified volume of liquid in a specified time to provide an accurate flow rate. Many precision metering pumps use a flexible diaphragm mechanism and checkball configuration to transfer fluid from a source tank to a process fluid tank for treatment. During a suction stroke, the diaphragm and checkball(s) generally create a negative pressure scenario that lifts the fluid from the source tank into the suction tube toward the suction end of the pump. During the discharge stroke...

Claims

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Application Information

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IPC IPC(8): F04D9/02F04B43/14F04D9/04F04B49/06
CPCF04D9/04F04B49/06F04D9/02F04B43/14F04B13/00F04B43/0081F04B43/04F04B17/042F04B23/025F04B49/02F04B49/065F04B49/10F04B2201/0206F04B2201/0207F04B17/04F04B2203/0401
Inventor CARMAN, JASONFAIRFIELD, NILE
Owner MILTON ROY
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