Chlorophyll filter

Abstract

The invention discloses a chlorophyll filter, comprising a transparent barrel, a push rod, a filtering membrane and a filtering cover, wherein a rubber plug is arranged at the front end of the push rod and is located in the barrel, the outer wall of the rubber plug is in sliding contact with the inner wall of the barrel, the rear end of the push rod stretches out from the rear opening of the barrel, the filtering membrane is circular and is arranged on the front opening of the barrel, the filtering cover covers on the front opening of the barrel, a liquid outlet is formed at the front end of the filtering cover, and scales are marked on the barrel from front to back. The filtering membrane of the chlorophyll filter is located in the barrel, so that the contact area between the filtering membrane and water is increased, blockage of the filtering membrane is prevented, filtering pressure is lowered, impact of pressure to the filtering membrane and the filtering cover is relieved, and the filtering membrane is prevented from being damaged by impact or the filtering cover is prevented from being moved out by impact due to high filtering pressure. The filtering cover is in threaded connection with the barrel, the connection is firm, and the sealing performance is good, so that the filtering volume can be precisely measured, and the measurement precision is ensured.

Description

technical field [0001] The invention relates to a filtering device, in particular to a device for filtering chlorophyll out of water. Background technique [0002] In the determination of water quality, the content of algae in the water used to evaluate the water quality can be obtained by detecting the content of chlorophyll in the water. According to the requirements of the spectrophotometric method SL88-194 for the determination of chlorophyll in the industry standard of our country, when collecting chlorophyll, the filter used is generally a needle filter, which consists of two parts, the ordinary syringe and the detachable needle filter. The filter head, when in use, insert the injection head of the syringe into the hole of the filter head for connection. [0003] Due to the small pore size of the filter membrane and the small surface area of ​​the filter membrane, when the biomass in the water body is high or the turbidity of the water body is high, the filter pores o...

AI Technical Summary

Problems solved by technology

[0003] Due to the small pore size of the filter membrane and the small surface area of ​​the filter membrane, when the biomass in the water body is high or the turbidity of the water body is high, the filter pores of the filter membrane will be blocked, the filter pressure will increase, and the syringe will be connected to the filter head. Water leaks at places, the filtration volume is inaccurate, and the accuracy of final measurement is reduced. The high filtration pressure even causes the filter head to be washed out, the collection of chlorophyll fails, the filter membrane is lost, and wastes manpower and material resources.

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