Splicable pneumatic steady-flow micro valve manufactured through 3D printing
A 3D printing, flow-stabilizing technology, applied in the field of microfluidics, can solve the problems of flow fluctuation, not considering flow stability, influence, etc., to ensure stability, flow regulation effect and good cutoff, and eliminate flow fluctuation. Effect
Active Publication Date: 2021-05-04
SOUTHEAST UNIV
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Problems solved by technology
There are many types of micro valves, which can be divided into piezoelectric ceramic micro valves, pneumatic micro valves, electromagnetic micro valves, shape memory alloy micro valves, phase change micro valves, etc. according to the driving form. However, traditional micro valves generally only consider The flow control effect is considered, and the flow stability is not considered
The control object of the micro-valve is the micro-flow, and the accuracy of the flow control is paid special attention to when it is applied. If no measures are taken when the inlet pressure fluctuates, the flow will fluctuate and affect the results of chemical testing or biological analysis. Therefore, it is urgently needed. A microvalve that can not only regulate the flow rate but also ensure the flow stability of the microchannel
Method used
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[0048] As an embodiment, the lower runner block 100, the diaphragm 200 and the upper runner block 300 are locked by bolts;
[0049] The diaphragm 200 is made of PDMS or other materials with large deformation and good toughness, and the diaphragm 200 fills the gap between the two flow channel blocks.
[0050] Such as image 3 As shown, for the convenience of description and clear and intuitive display, the corresponding part of the diaphragm 200 between the inlet chamber 106 and the feedback chamber 302 is named as the steady flow film 201, and the corresponding diaphragm 200 between the power chamber 303 and the inlet chamber 108 is named The part is named flow regulating film 202 .
[0051] As an implementation, the lower runner block 100 and / or the upper runner block 300 are provided with buckle parts for connecting multiple microvalves.
[0052] The splicable pneumatic steady flow microvalve produced by 3D printing in this embodiment has specific working methods and princ...
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The invention provides a splicable pneumatic steady-flow micro valve manufactured through 3D printing. The splicable pneumatic steady-flow micro valve comprises a lower flow channel block, a diaphragm and an upper flow channel block, wherein the diaphragm is connected between the bottom face of the lower flow channel block and the top face of the upper flow channel block in a sealed mode; a flow inlet cavity, a flow inlet cavity communicated with the flow inlet cavity and a plug communicated with the flow inlet cavity are arranged on the top surface of the lower flow channel block; a small groove communicated with the plug and a feedback cavity which is communicated with the small groove and corresponds to the flow inlet cavity are formed in the bottom surface of the upper flow channel block; the flow inlet cavity is communicated with an external fluid source, and the feedback cavity is communicated with the outside through a flow channel; when the pressure of fluid entering the flow inlet cavity or the feedback cavity fluctuates, the diaphragm between the flow inlet cavity and the feedback cavity deforms, and the flow fluctuation caused by the pressure change of an inlet of the flow channel can be eliminated, so that the stability of the flow is guaranteed, and the flow stability control capability of the micro valve is improved.
Description
technical field [0001] The invention relates to the technical field of microfluidics, in particular to a splicable pneumatic steady flow microvalve manufactured by 3D printing. Background technique [0002] The microfluidic chip (lab-on-a-chip) is an integrated chip that uses microfluidics as the operating object and replaces the laboratory to complete functions including micro sample introduction, transmission, dilution, mixing, reaction and detection. There is huge potential for development in areas such as biology and medicine. [0003] The microvalve is one of the most important modules on the microfluidic chip. It is used to control the opening of the flow channel, change the flow direction, adjust the flow rate and flow stability, etc. The performance of the microvalve affects the function of the microfluidic chip. have a decisive influence. There are many types of micro valves, which can be divided into piezoelectric ceramic micro valves, pneumatic micro valves, ele...
Claims
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Login to View More IPC IPC(8): B01L3/00
CPCB01L3/502738B01L3/502746B01L3/502707
Inventor 张艳江源陈云飞田云陈凯
Owner SOUTHEAST UNIV