Priming device for electric pumps

Abstract

A priming device (10) for electric pumps (11) comprises means for the automatic filling of the pump body (12) upon starting with liquid that originates from the same basin (13) from which the electric pump (11) is designed to draw when it is in the steady-state condition, an electronic controller (14) for the coordinated management of the power-on and power- off of the automatic filling means and of the electric motor (15) of the electric pump (11), and liquid level sensor means (16), which are associated with the pump body (12) and interconnected with the electronic controller (14), in order to detect the level of liquid inside the pump body (12).

Description

technical field [0001] The invention relates to a priming device for an electric pump. Background technique [0002] Electric pumps such as self-priming electric pumps, especially centrifugal electric pumps, are particularly useful for water supply in domestic systems, small farms, gardening, and generally where liquids need to be moved. [0003] Self-priming is the ability of the pump (if such a pump is under head pressure) to draw liquid into the suction line during pump start-up. [0004] In order to achieve this, it is usually necessary to first fill the pump body with the liquid to be pumped. [0005] All self-priming pumps are capable of generating a partial vacuum which is sufficient to ensure correct operation of the pump during the pumping step. [0006] A non-return valve included in the pump body prevents the pump body from venting when the pump is stopped, thus enabling rapid self-priming when the pump is restarted. [0007] The self-priming capability allows ...

AI Technical Summary

Problems solved by technology

[0009] This negligence will inevitably make the electric pump run dry, and the result will be the damage of the pump seal. Normally, the pump seal needs to be lubricated by the liquid itself.

[0010] At the same time, there can be no turbulent flow without liquid in the pump body, which needs to occur in order to create the partial vacuum needed to lift the liquid from the outside of the pump into the pump body. Therefore, electric pumps are basically unable to pump liquid, much to the disappointment of users and dissatisfied

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