Bottom-valve-free centrifugal pump water filling and gas exhausting device and using method

Abstract

The invention discloses a bottom-valve-free centrifugal pump water filling and gas exhausting device. The bottom-valve-free centrifugal pump water filling and gas exhausting device is composed of an upper replacement valve, a replacement tank, a connecting hose and a lower replacement valve. The upper side of the replacement tank is connected with the lower end of a pipeline with the upper replacement valve. The lower side of the replacement tank is connected with the hose. The lower end of the hose is connected with the upper end of a pipeline with the lower replacement valve. The lower end of the pipeline with the lower replacement valve is connected with a branch pipe which is drawn out of a pipeline from an outlet valve to a pump in an upward mode. By closing the outlet valve of the pump, the pipe opening of an inlet pipe is inserted into liquid, and the inlet pipe and a pump body are changed into a bottomless closed container without a bottom valve from a bottomed open container with the bottom valve before; and then the range of a confined space is changed through the upper replacement valve and the lower replacement valve, and the liquid in the replacement tank can replace gas in the inlet pipe and the pump body.

Description

[0001] 1. Technical field [0002] The invention belongs to the technical field of centrifugal pumps, and in particular relates to a water filling and exhausting device for a bottomless valve centrifugal pump and an application method thereof. [0003] 2. Background technology [0004] The suction nozzle of the centrifugal pump installed above the liquid surface without self-priming ability generally needs to be equipped with a bottom valve. Before the centrifugal pump is started, the liquid filling valve must be opened, and after the bottomed open container formed by the pump casing and the suction pipe is filled with liquid, the liquid filling valve is closed. After the centrifugal pump is started, the impeller rotates to form a vacuum, and the water is sucked upward, so that the bottom valve is automatically opened to lift the water. The bottom valve installed at the suction pipe of the centrifugal pump will cause troubles such as inconvenient movement of the suction pipe, ...

AI Technical Summary

Problems solved by technology

The bottom valve installed at the suction pipe of the centrifugal pump will bring troubles such as inconvenient movement of the suction pipe, difficulty in cleaning and easy failure of the bottom valve during use.

Centrifugal pumps with self-priming ability can avoid the above-mentioned troubles, but their general structure is complicated, the cost is high, and the efficiency is low, the self-priming time is long, and the self-priming performance is poor. Condition

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