Filter element detection apparatus with tiny errors, and measurement method thereof

Abstract

The invention relates to a filter element detection apparatus with tiny errors and a measurement method thereof. The filter element detection apparatus comprises a liquid storage tank which is internally provided with testing liquid and an elevating system for fixing a to-be-detected filter element. The filter element detection apparatus is connected with a ventilation device. The ventilation device comprises an air source and an air conduit, wherein the air inlet end of the air conduit is connected with the air source; the air outlet end of the air conduit is provided with an air outlet; theair outlet is connected with the elevating system; and the air inlet end of the air conduit is successively provided with a pressure regulating valve, a pressure meter and a ventilation control switch. Compared with the prior art, the filter element detection apparatus provided by the invention has the advantages that since the elevating system is arranged, the detection apparatus is convenient todetect and operate; a to-be-detected filter element is soaked in the testing liquid before testing, so capillary holes in the filter paper of the filter element are infiltrated by the testing liquid,the filter paper of the filter element is totally wetted, and the phenomenon of false bubbles during measurement is avoided; and the air outlet is allowed to be located above a liquid level and residual liquid in the air conduit is thoroughly discharged as the elevating system rises, so pressure influence caused by liquid in the air conduit can be eliminated, the precision of measured values is ensured, experimental errors are tiny and the detection method is accurate.

Description

technical field [0001] The invention relates to a filter element detection device, in particular to a filter element detection device and a measuring method with small errors. Background technique [0002] In industrial production, in order to detect the integrity and airtightness of an object, the object is usually immersed in a liquid, a certain air pressure is input into the object, and the sealing performance of the object is evaluated by observing whether there are bubbles on the surface of the object, and the position of the air bubble and the point of maximum aperture can be observed , this method is called the bubble method. At present, the detection of the structure of the filter element is to use the bubble method to distinguish whether the hot melt adhesive, polyurethane and filter paper are bonded, whether the sealing is good or not, whether the filter paper is damaged during processing, and whether the pressure value of the first bubble of the filter element mee...

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Problems solved by technology

[0003] The pressure of the bubbles is determined according to the readings on the pressure gauge, but during the ventilation process, the test liquid usually remains in the trachea, and the gas outlet of the trachea is located below the liquid surface, which has a certain forehead pressure, which will affect the accuracy of the test results. The existing device and measurement There is a large error in the method, which cannot truly reflect the maximum pore size of the filter element

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