Sample solution fixed-value sampling apparatus and method

A sampling device and sample liquid technology, which is applied to the sampling device and other directions, can solve the problems of inaccurate fixed value sampling, and achieve the effect of avoiding false alarms by sensors and high accuracy of sampling.

Pending Publication Date: 2017-10-27
HANGZHOU CHUNLAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the operation of the peristaltic pump, due to the aging of the pump tube and other reasons, its flow rate will decline with time, resulting in inaccurate sampling of the fixed value

Method used

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  • Sample solution fixed-value sampling apparatus and method
  • Sample solution fixed-value sampling apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 Schematically provides the structural diagram of the fixed value sampling device for sample liquid in this embodiment, as figure 1 As shown, the fixed-value sampling device for sample liquid in this embodiment includes a sample liquid, a container, a sampling pipeline connecting the sample liquid and the container, and a delivery unit arranged on the sampling pipeline for providing power. The device further includes:

[0033] At least one sensor, the sensor is provided with a plurality of photocouplers along the direction of the sampling pipeline, and when there are multiple sensors, the sensors are connected in series on the sampling pipeline at intervals;

[0034] A sampling valve, the sampling valve is located between the sample liquid and the sensor;

[0035] A control unit, the control unit selectively adopts a signal of a photoelectric coupler in one of the sensors to control the closing of the sampling valve, and obtains a fixed-value sample liquid bet...

Embodiment 2

[0054] An application example of obtaining 10 ml of a single sample liquid at a fixed value in water quality analysis and sampling according to the fixed value sampling device for sample liquid according to Embodiment 1 of the present invention.

[0055] Such as figure 2 As shown, in this embodiment, the sample liquid is connected to the sampling pipeline through a three-way solenoid valve, the other interface of the three-way solenoid valve is connected to the distilled water test bottle, and the sampling pipeline is sequentially provided with a sampling valve, sensor A and sensor B, where the capacity of the sampling pipeline between the sampling valve and sensor A is 10ml, the capacity of the sampling pipeline between sensor A and sensor B is 5ml, and the delivery unit is a peristaltic pump. The control unit controls the three-way solenoid valve, the sampling valve, the sensor A, the sensor B and the peristaltic pump, wherein the sensor A and the sensor B are both provided...

Embodiment 3

[0062] This embodiment is an application example in which the sample liquid fixed-value sampling device in embodiment 1 collects multiple sample liquids at a fixed value and mixes them when mixing the sample liquids.

[0063] Such as image 3 As shown, in this embodiment, the various sample liquid components of the proportioned mixed sample liquid are connected to the sampling pipeline through the multi-way valve, wherein one channel of the multi-way valve is connected to the distilled water test bottle. The sampling pipeline is provided with sampling valves and multiple sensors arranged at intervals in sequence. The container is a mixing container, and the mixing container is set between the sampling valve and the first sensor through a three-way valve, and between the mixing container and the sampling pipeline. A solenoid valve is arranged on the connecting pipeline. The delivery unit is a peristaltic pump, and the peristaltic pump is arranged behind the sensor.

[0064] T...

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PUM

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Abstract

The invention provides a sample solution fixed-value sampling apparatus. The sample solution fixed-value sampling apparatus comprises a sample inlet pipeline, a sample inlet valve arranged on the sample inlet pipeline, a conveying unit and at least one sensor, wherein a plurality of photoelectric couplers are arranged in the sensor, when in sampling, after a sample solution passes through the sample inlet valve to reach the sensor, the sensor transmits a signal to a control unit, the control unit controls the sample inlet valve to be closed, a fixed-value sample solution between the sample inlet valve and the sensor is obtained, a photoelectric coupler calibration unit is provided before the sampling, the photoelectric coupler calibration unit can remove a photoelectric coupler interfered by residual liquid on the inner wall of the sample inlet pipeline so as to prevent the influence of misinformation on the sample solution fixed-value sampling can be prevented. The invention also provides a sample solution fixed-value sampling method. The sample solution fixed-value sampling apparatus and method have the advantages of high sampling accuracy and small interference.

Description

technical field [0001] The invention relates to fixed value sampling in the liquid sample sampling process, in particular to a sample liquid fixed value sampling device and method in a water quality analyzer. Background technique [0002] The water quality online analysis instrument is a water quality monitoring tool, which can achieve automatic real-time monitoring of various parameters of water quality. It belongs to an interdisciplinary field, which integrates the professional techniques of physics, chemistry, mechanics, electronic information and so on. The metering part is an important part in the water quality online analyzer. For example, when measuring the COD concentration, the function of the metering part is to precisely control the required amount of potassium dichromate and water samples. Potassium dichromate reduces the oxygen consumption in the water sample Substances, reducing substances and organic substances are oxidized to a solution that can be reduced b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14
CPCG01N1/14
Inventor 许哲哲付聪刘建龙朱伟健张果胡兴斌唐怀武
Owner HANGZHOU CHUNLAI TECH
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