Pretreating device of online water quality analyzer

Abstract

The invention relates to a pretreating device of an online water quality analyzer. By adoption of the pretreating device, the problems in the prior art that a sampling control valve is easily damaged, a filter is more easily blocked, and the use place is limited by tap water are solved. The pretreating device comprises a water feeding pipe, a water discharging pipe, a primary filter, a precise filter, an ejector, a pipeline branch part, a normally closed electromagnetic valve, a first normally open electromagnetic valve and a second normally open electromagnetic valve; the water feeding pipe is connected with a first opening of the pipeline branch part by the primary filter; a second opening of the pipeline branch part is connected with a spraying nozzle of the ejector by the normally closed electromagnetic valve; a diffusion chamber of the ejector is connected with the water discharging pipe; a third opening of the pipeline branch part is connected with an inlet / outlet under a precise filter by the first normally opened electromagnetic valve; the inlet / outlet under the precise filter is also connected with a suction chamber of the ejector by the second normally open electromagnetic valve. The pretreating device has the beneficial effects that a water sample filtered by two stages can be supplied to the online water quality analyzer in real time, and separated automatic cleaning of two stages of filtering nets can be realized.

Description

technical field [0001] The invention relates to a pretreatment device for an online water quality analyzer in the fields of environmental monitoring, industrial process water, etc., and belongs to a pretreatment device for an online water quality analyzer. Background technique [0002] The pretreatment of the existing online water quality analyzer is generally to draw the water sample to be tested by an external water pump to the pretreatment device, and filter out various solid impurities in the water sample, such as sludge and suspended matter, through the filter system of the pretreatment device. Then the filtered water sample is sent to the online analysis instrument. At present, the preprocessors produced by most manufacturers have at least one stage of filtration and are equipped with flushing devices, and they all use tap water to flush the filter screen. There are also preprocessors of individual manufacturers that do not have a flushing device at all. For a preproc...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pretreatment device for an online water quality analyzer, which solves the problem that the existing online water quality analyzer pretreatment device is easy to block or even destroy the sampling pinch valve (solenoid valve), the filter is more likely to be blocked, and the place of use is affected by tap water. Technical problems such as restrictions and large amount of manual maintenance

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