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Accurate solution matching device

A solution and precise technology, applied in the field of solution proportioning device and precise solution proportioning device, can solve the problems of large volume, low precision and resolution, complex structure, etc. The effect of controlling precision

Inactive Publication Date: 2010-06-23
杨志刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of precise solution proportioning device to solve the problems of existing solution proportioning devices such as low precision and resolution, complex structure, and large volume.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In Embodiment 1, the piezoelectric pump adopts a single-cavity structure, the diaphragm-type cavity adopts a single piezoelectric vibrator structure, and the active valve adopts a piezoelectric vibrator-driven active valve.

[0044] refer to Figure 11 , the single-cavity piezoelectric pump 5a is the pumping unit of the piezoelectric precise solution proportioning device of the present invention; the single piezoelectric vibrator chamber 3a is the sample liquid suction unit; the piezoelectric active valve 4a is the intermediate valve control unit; The outlet of cavity 3a is connected with suction needle 2 .

Embodiment 2

[0045] In Embodiment 2, the piezoelectric pump adopts a two-cavity series structure, the diaphragm-type cavity adopts an electromagnetic motor-driven single-diaphragm structure, and the active valve adopts a piezoelectric vibrator-driven active valve.

[0046] refer to Figure 12 , the piezoelectric pump 5b with two cavities connected in series is the pumping unit of the piezoelectric precise solution proportioning device of the present invention; the cavity 3b is the sample liquid suction unit; the piezoelectric active valve 4a is the intermediate valve control unit; the single diaphragm capacity The outlet of cavity 3b is connected with suction needle 2 .

Embodiment 3

[0047] In Embodiment 3, the piezoelectric pump adopts a parallel structure of two cavities, the piezoelectric cavity adopts a structure of two oscillators, and the active valve adopts an electromagnetic motor-driven active valve.

[0048] refer to Figure 13 , the piezoelectric pump 5c with two cavities in series is the pumping unit of the piezoelectric precise solution proportioning device of the present invention; the two vibrator cavities 3c are the sample liquid suction unit; the electromagnetic motor-driven active valve 4c is the middle valve control unit; The outlet of the vibrator cavity 3c is connected with the suction needle 2 .

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Abstract

The invention relates to a precise matching device for solution, belonging to the solution matching device, wherein, the output of a piezoelectric pump for pumping dilution is connected with the inlet of an active valve; the outlet of the active valve is connected with one end of a diaphragm type cavity for pumping the sample solution; an electric control unit is connected with the piezoelectric pump; the active valve is connected with the diaphragm type cavity. The precise matching device has the advantages of high control precision, high resolution, simple and reliable structure, compact size, easy integration and large variable range of dilution ratio.

Description

technical field [0001] The invention relates to a precise solution proportioning device, in particular to a solution proportioning device composed of a piezoelectric pump, a diaphragm cavity and an active valve, belonging to the technical field of precision fluid control. Background technique [0002] At present, in devices used for precise solution proportioning, the way of motor plus piston is mostly used for liquid suction and discharge. For example, in the patent "Variable Ratio Diluter" (200520028891.8), two linear stepping motors are used to directly drive the large and small pistons to realize the absorption and discharge of solvent diluent and sample liquid. If the stroke of the motor is the same, the ratio of the area of ​​the piston is the ratio of the volume of the diluent to the sample liquid; in addition, the variable ratio dilution of the liquid can be realized by adjusting the stroke of the motor. This kind of solution proportioning device generally includes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/38
Inventor 沈传亮杨志刚董景石田丰君孙晓峰闫世伟
Owner 杨志刚
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