Pointwise scanning type micro-fluid metering device and method

Abstract

Disclosed is a pointwise scanning type micro-fluid metering device and a method thereof. The device comprises an N-way valve, a closed anti-corrosion fluororubber tube, a peristaltic pump, a fluid outlet, a control computing unit and two fluid detector Y1 and Y2, wherein for the N-way valve, 1-1 is an air port, 1-i are fluid inlets, and i is equal to 2 to N; the N-way valve is sequentially connected with the fluid detectors Y1 and Y2 through the closed anti-corrosion fluororubber tube the other end of which is connected with one end of the peristaltic pump with the other end connected with the fluid outlet; the control computing unit are respectively connected with the N-way valve, the fluid detectors Y1 and Y2 and the peristaltic pump.

Description

technical field [0001] The invention relates to a liquid sampling and metering system in water quality monitoring instruments in the field of environmental protection, in particular to a device and method for quantitatively taking trace amounts of liquid. Background technique [0002] Since the reform and opening up, China's economy has developed rapidly, and its economic construction has made remarkable achievements. However, many industries are sacrificing the environment and resources in exchange for temporary economic prosperity. Some high-energy-consuming and high-pollution enterprises have brought enormous pressure to our country's environment and resources. In the long run, this will definitely restrict The further development of our country's economy. Controlling sewage discharge of enterprises and monitoring environmental water quality requires the use of a large number of online water quality monitoring instruments, which need to measure trace (≤5ml) water samples...

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Problems solved by technology

The mechanical structure is complex, it is difficult to achieve the effect of sealing and anti-corrosion, and it is difficult to take the liquid below 10 ml, and if we want to measure sewage and other liquids that may contain algae or flocs, it will definitely affect the friction of the counting impeller rotation. Thus affecting the measurement accuracy

[0006] Another example is that the time pulse control step-by-step quantitative liquid feeding machine with the patent No. CN86200994U and the non-contact liquid flow indicating device with the patent No. ZL91103249, although the anti-corrosion effect has been achi

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