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Liquid sampling device

A liquid sampling and sampling pipeline technology, applied in the direction of sampling devices, etc., can solve the problems of sampling result deviation, difficult maintenance, high cost, etc., and achieve the effect of realizing automatic calibration, ensuring sampling accuracy, and reducing control costs

Active Publication Date: 2012-09-19
浙江泰林分析仪器有限公司
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AI Technical Summary

Problems solved by technology

The current sampling system mainly uses a peristaltic pump matching solenoid valve or a syringe pump matching solenoid valve to sample the sample to be tested. Different pipelines often have different resistances, and the power provided by the peristaltic pump is constant, which will cause the peristaltic pump to provide the same power at the same time, but the sampling results of different pipelines will appear correspondingly. The deviation affects the accuracy of sampling results; the sampling by syringe pump has a higher accuracy than that of a single peristaltic pump, but the matching solenoid valve controls different pipelines, the whole system has complex structure, large volume, high cost and Maintenance is also more difficult

Method used

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  • Liquid sampling device
  • Liquid sampling device

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Embodiment Construction

[0012] The present invention includes a liquid replenishment container 8, two or more liquid containers 9 to be tested, a sampling pipeline, a sampling container 7, a sampling needle 1 arranged at one end of the corresponding sampling pipeline, and a peristaltic pump 2 corresponding to the corresponding sampling pipeline One end of the peristaltic pump 2 is connected to the liquid container 9 to be tested, the other end is provided with a liquid replenishment pipeline connected to the liquid replenishment container 8 and a liquid outlet 10 at the other end of the sampling pipeline to be connected, and a three-way joint is connected to the peristaltic pump 2, Between the liquid outlet 10 and the liquid replenishment pipeline.

[0013] The sampling pipeline is also equipped with a two-dimensional motion mechanism and a weighing scale 11 that feeds back the pipeline pressure to the control system of the peristaltic pump 2. The weighing scale 11 includes a pressure sensor and a liq...

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Abstract

The invention discloses a liquid sampling device which comprises a liquid infusion container, two or more containers with liquid to be tested, a sampling pipeline, a sampling container, a sampling needle arranged at one end of the sampling pipeline correspondingly, and a peristaltic pump corresponding to the corresponding sampling pipeline, wherein one end of the peristaltic pump is communicated with the container with liquid to be tested, the other end of the peristaltic pump is provided with a liquid infusion pipe connected with the liquid infusion container, and a liquid outlet to be connected with the other end of the sampling pipeline. Compared with the prior art, the liquid sampling device has the beneficial effects that the sampling pipeline is controlled by the peristaltic pump, so that the structure is simple and the control cost is lowered; in addition, a metering gage additionally arranged is used for testing the sampling pipeline and feeding back control on the peristaltic pump, thus objectively realizing automatic alignment on the sampling pipeline and ensuring the sampling accuracy.

Description

technical field [0001] The invention relates to a liquid sampling device, in particular to a liquid sampling device used in conjunction with a dissolution rate measuring instrument. Background technique [0002] Sampling and analysis instruments for on-line monitoring of liquids in pipelines and containers have been widely used. To achieve on-line monitoring of liquids, the first problem is to collect the measured liquids into the on-line monitoring analysis instruments, such as ultra-pure water quality analysis in the industrial field , urban sewage discharge detection, and analysis and determination of drug dissolution in the pharmaceutical field. The current sampling system mainly uses a peristaltic pump matching solenoid valve or a syringe pump matching solenoid valve to sample the sample to be tested. Different pipelines often have different resistances, and the power provided by the peristaltic pump is constant, which will cause the peristaltic pump to provide the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14
Inventor 叶大林夏信群
Owner 浙江泰林分析仪器有限公司
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