Filtration device combined with self-priming pump

Abstract

The present invention provides a filtration device combined with self-priming pump in which a filter replacement work is easy and safe, and removal of air inside of a pump and priming are not necessary. And this filtration device is characterized to provide with a pump unit, which is a valveless-construction self-priming pump without a check valve, including a suction port, a suction chamber, an impeller, a self-priming chamber, a discharge port from an upstream of a channel to a downstream thereof in this order, the suction port and the discharge port being arranged above the level of the suction chamber and the impeller, and a self-priming chamber arranged above the level of the suction port and the discharge port; a filtration unit arranged on a channel between the self-priming chamber and the discharge port and above the level of the self-priming chamber; and a filter arranged inside of the filtration unit and above the level of residual liquid inside of the pump unit at the time of suspending of the pump unit.

Description

technical field [0001] The present invention relates to a self-priming filter device, in particular to a filter device with a self-priming pump. Background technique [0002] In the chemical field and other fields, filtration devices are generally used as means for removing impurities from various liquids. Among them, some filter devices have a pump that sucks the liquid stored in a container, etc., and after passing through the filter, sends the liquid to the subsequent process or returns the liquid to the above-mentioned container for circulation. There are known devices in the form of a filter device having a pump with a push-in type foot valve (押込み式一ト式きポンプ) (refer to Japanese Patent Laid-Open No. 2005-238071 and Japanese Patent Laid-Open No. 2004-188337) . [0003] On the other hand, a self-priming chemical pump is known as a valve-less self-priming pump (see Japanese Patent No. 2665140). [0004] In the above-mentioned filter devices of the type described in JP-A-200...

AI Technical Summary

Problems solved by technology

[0005] However, the recovery of the liquid that is discharged from the filter unit through the drain pipe must be done by hand using a bucket, etc., which is not only complicated but also dangerous depending on the type of liquid.

[0006] In addition, the filter immersed in the liquid until the liquid is discharged, even if the liquid is discharged, the so-called dripping problem of the liquid remaining inside or on the surface of the filter may occur, so not only the operator will be polluted when taking it out , around the equipment, and it is difficult to remove the dripping filter, the replacement operation is complicated and troublesome, and may be dangerous depending on the type of liquid

[0007] In addition, when restarting the operation after replacing the filter, it is necessary to discharge the air in the pump and perform priming water, so not only labor is required, but also there is a problem that the operation interruption time is prolonged.

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