Accurate liquid extracting and metering device and method

A metering device and precise technology, applied in measurement devices, sampling devices, volume measuring instruments/methods, etc., can solve problems such as high cost, inaccurate liquid measurement, and complex system

Active Publication Date: 2010-02-24
YIWEN ENVIRONMENTAL SCI & TECH GUANGZHOU
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  • Abstract
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  • Claims
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Problems solved by technology

The device has high sampling accuracy. Various impurities in the sewage will affect the strength of the light signal, but the reliability of the device depends too much on the sensitivity of the light sensor. The volume of the syringe pump is limited, and the volume of the liquid that can be measured is inflexible. Each volume measurement needs a pair of photoelectric sensors, so the struct

Method used

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  • Accurate liquid extracting and metering device and method
  • Accurate liquid extracting and metering device and method
  • Accurate liquid extracting and metering device and method

Examples

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Embodiment Construction

[0020] Figure 4 Shown is a schematic structural diagram of the metering system of the present invention, which is mainly composed of a valve unit 16, an electromagnetic shut-off valve 17, a liquid detector A 18, a liquid storage unit 19, a liquid detector B 20, and a pump 21. The inlet of the valve unit 16 is The liquid passage P1 is connected with the liquid (or reagent), the test passage P2 is connected with the test module, the liquid discharge passage P3 is connected with the air, and the common passage of the valve unit 16 is connected with one end of the liquid detector A 18 through the electromagnetic shut-off valve 17. The other end of the liquid detector A 18 is connected to one end of the liquid storage unit 19, the other end of the liquid storage unit 19 is connected to one end of the liquid detector B 20, and the other end of the liquid detector B 20 is connected to the pump 21 . Among them, the valve unit 16 is used for the switching selection of the pipeline ch...

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Abstract

The invention discloses an accurate liquid extracting and metering device and a method. The device comprises a pump, a valve unit, an electromagnetic stop valve, a liquid storing unit, a testing module, a liquid detector A and a liquid detector B, wherein the valve unit is provided with a liquid inlet passage, a testing passage, a liquid discharging passage and a common passage connected with theliquid storing unit; the liquid inlet passage of the valve unit is connected with liquid; the testing passage is connected with the testing module; the liquid discharging passage is connected with a waste liquid collecting device; the common passage is connected with one end of the liquid detector A by the electromagnetic stop valve, and the other end of the liquid detector A is connected with oneend of the liquid storing unit; the other end of the liquid storing unit is connected with one end of the liquid detector B, and the other end of the liquid detector B is connected with the pump.

Description

technical field [0001] The invention relates to a liquid sampling and measuring system in water quality monitoring instruments in the field of environmental protection, in particular to an accurate liquid taking and measuring device and method. Background technique [0002] The liquid sampling metering device is one of the core components of the water quality monitoring instrument. The accuracy and reliability of the metering device directly determine the accuracy of the test results and the reliability of the instrument. The dexterity of the device determines the reusability, development cycle and cost. At present, there are three main types of liquid sampling and measurement technologies applied to water quality online monitoring instruments: [0003] (1) Use the sensor to sense the momentary flow of the liquid in the conduit, and realize the measurement of the liquid volume by controlling the flow rate and switching time of the pump. The principle is as follows figure 1...

Claims

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Application Information

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IPC IPC(8): G01N1/14G01F19/00
Inventor 肖巍赵忠欣傅杨剑
Owner YIWEN ENVIRONMENTAL SCI & TECH GUANGZHOU
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