Self-control metering sampling peristaltic pump system

Abstract

According to the technical scheme, the peristaltic pump system comprises a control unit, a driving unit, a machine box and a pump head, a liquid conveying pipe and a pump shaft with idler wheels are arranged in the pump head, the pump head comprises a front shell, an upper shell and a lower shell, the lower shell is arranged on the front shell, and the lower shell is arranged on the upper shell. A linkage mechanism is arranged between the upper shell and the lower shell, the linkage mechanism is electrically connected with the control unit, the control unit controls the linkage mechanism to be opened, the upper shell is matched with the lower shell to clamp the infusion tube, the control unit controls the linkage mechanism to be closed, and the upper shell is far away from the lower shell. According to the present invention, the design is novel, each pump head can be separately controlled, the liquid inlet amount of each reagent can be separately metered, the traditional metering pipe, the traditional multi-ported valve and other devices are cancelled, such that the device integration level is high, different channels can be switched, the flexibility and the variability are provided, and the automatic metering and automatic sample introduction functions are achieved.

Description

technical field [0001] The invention relates to the technical field of peristaltic pumps, in particular to a self-controlled metering and sampling peristaltic pump system. Background technique [0002] Peristaltic pump is a commonly used fluid delivery device. Its principle is to deliver fluid by alternately squeezing and releasing the elastic delivery hose. It has the advantages of no pollution, high precision, low shear force, good sealing, and simple maintenance. , is widely used. [0003] Existing peristaltic pumps are usually equipped with multiple pump heads side by side, but they cannot individually control the peristaltic liquid for each pump head, resulting in defects in its application, such as the existing patent "stop flow-sequential injection-cerium oxidation online monitoring of COD in water method", "a water quality ammonia nitrogen online monitoring device", "a special equipment for measuring the COD value of the solution", etc., all use syringe pumps (peris...

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Problems solved by technology

[0003] Existing peristaltic pumps are usually equipped with multiple pump heads side by side, but they cannot individually control the peristaltic liquid for each pump head, resulting in defects in its application, such as the existing patent "stop flow-sequential injection-cerium oxidation online monitoring of COD in water method", "a water quality ammonia nitrogen online monitoring device", "a special equipment for measuring the COD value of the solution", etc., all use syringe pumps (peristaltic pumps), multi-way valves, and metering devices to complete the sampling and metering of each reagent. , but this mode requires three kinds of module materials, which takes up a lot of space in the equipment, has many operation joints, and complicated installation, which is not conducive to the small integration of products

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