Passive device for improving rapid liquid discharge of multiple self-priming pumps

Abstract

The invention discloses a passive device for improving rapid liquid discharge of multiple self-priming pumps. The passive device comprises a passive water tank, wherein an ultrasonic liquid level meter and a float switch are respectively arranged on the passive water tank; the passive water tank is communicated with a first liquid pool through an exhaust pipe; the passive water tank is connected with a main outlet valve through a pipeline; the main outlet valve is connected with a blow-down valve through a pipeline and communicated to the first liquid pool; the main outlet valve is connected with a first electromagnetic valve through a pipeline; the first electromagnetic valve is connected with a first self-priming pump through a pipeline; the passive water tank is connected with a main inlet valve through a pipeline; the main inlet valve is sequentially connected with a first check valve, a third electromagnetic valve and a first pressure reducing valve through a pipeline; the main inlet valve is communicated with the first self-priming pump; the first self-priming pump is provided with a first suction inlet; the first suction inlet is communicated with the first liquid pool through a pipeline; and the first self-priming pump is provided with a first liquid outlet. The passive device for improving rapid liquid discharge of the multiple self-priming pumps has the advantages that the passive design is adopted, and the "once for all" liquid adding of one or more self-priming pumps before the pumps are started can be thoroughly realized.

Description

technical field [0001] The invention belongs to passive devices, and in particular relates to a passive device for improving rapid liquid discharge of multiple self-priming pumps. Background technique [0002] Working principle of the self-priming pump: Before the self-priming pump is started, there must be a certain amount of liquid in the pump cavity. After the pump is started, the impeller rotates to fully mix the air and liquid in the suction line and discharge it to the gas-liquid separation chamber. The gas in the upper part of the gas-liquid separation chamber escapes, and the liquid in the lower part returns to the impeller due to gravity, and re-mixes with the remaining gas in the suction line until all the gas in the pump and the suction line is exhausted, and the self-priming is completed, and the pump starts into normal working condition. [0003] The main advantage of the self-priming pump is that it does not need to be installed at the bottom of the liquid poo...

AI Technical Summary

Problems solved by technology

Once the amount is lower than the required limit, the self-priming pump is still running, and the consequences range from pumping out liquid or taking a long time to pumping out liquid, to serious problems and even burning the mechanical seal, making the equipment unable to operate safely and reliably.

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