CN216440663U

CN216440663U - Cylindrical mixer with groove

Info

Publication number: CN216440663U
Application number: CN202122331729.5U
Authority: CN
Inventors: 吴涛; 吴之豪; 刘宏举; 卞钦; 何纪新; 赵俊程; 周腾; 史留勇
Original assignee: Hainan University
Current assignee: Hainan University
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-05-06
Anticipated expiration: 2031-09-26

Abstract

The utility model belongs to the field of computational fluid mechanics, and particularly discloses a cylindrical mixer with grooves. Six grooves are respectively embedded in the wall of the mixing channel, after the solution passes through the cylindrical channel with the six grooves, the solution can generate vortex in the mixing channel to break the original state of the fluid, and the solution with different concentrations in the mixing channel can be fully mixed after generating vortex. After passing through the whole mixing channel, the solutions with different concentrations can achieve an ideal mixing effect. The utility model is characterized in that: only need make solution pass through the mixing channel, solution produces the flow under receiving pressure self, collides the groove part afterwards and will produce the vortex, need not apply other extra energy, just can make different solutions realize mixing, need not to carry out complicated design to the mixing channel, improvement mixing efficiency that can be great, energy saving.

Description

Cylindrical mixer with groove

Technical Field

The utility model relates to a cylindrical mixer, in particular to a cylindrical mixer with grooves.

Background

The micro-fluidic chip is a scientific technology which is mainly characterized by controlling fluid in a micron-scale space, and has the capability of shrinking the basic functions of laboratories such as biology, chemistry and the like to a chip with a few square centimeters, so the micro-fluidic chip is also called a lab-on-a-chip, and a micro mixer is taken as an important component of the micro-fluidic chip and is sufficient to attract more attention; with the continuous development and progress of society, a microfluid mixer is used before test reaction in various fields such as chemical experiments, environmental monitoring and analysis, DNA detection and the like, so that various reagents can be fully mixed under different requirements; the microfluid mixer has the characteristics of rapidness, high efficiency, easy control and easy integration, and has the advantages of lower cost, simple structure and good mixing.

Mixing generally refers to unit operations in which two or more materials are dispersed with each other to a certain degree of uniformity by means of mechanical or hydrodynamic methods, but the micron-scale dimension is greatly different from the flow of macroscopic fluids, the effect brought by the convection action of the fluids at the micron-scale dimension is not strong, and in this case, the mixing of microfluids mainly depends on the intermolecular diffusion action, so that the mixing of microfluids becomes difficult under certain experimental requirements; the low-cost micro-fluid mixer can improve the mixing efficiency between fluids through simple structural improvement, and achieve the expected mixing effect.

The micro mixer can be divided into a passive micro mixer and an active micro mixer according to different input energy; the former simply utilizes the geometrical shape or the fluid characteristic to generate a mixing effect, and the mixing does not depend on other external forces except the force (such as pressure, electroosmosis driving and the like) for driving the fluid to flow, and the mixer does not contain any movable part; the latter realizes mixing by means of external forces such as magnetic force, electric field force, sound field and the like; the active micro-fluid mixer has good mixing effect, but the universality of the technology in various fields is not high due to the complex structure and high cost; the passive micro-fluid mixer is simple in structure, high in response speed, low in processing cost, convenient to use and widely used in various fields.

In most of current fluid experimental processes, two or more fluids are required to be fully mixed, most of the current mixing modes adopt two or more fluids to be introduced from respective pipelines and directly discharged after being converged, so that the micro-fluid mixing efficiency is very low and the mixing precision required by experiments cannot be achieved.

In order to improve the mixing efficiency of the passive micro mixer, the effective contact area between the fluids is increased by usually dividing the fluids for many times and then polymerizing the fluids, and the diffusion efficiency and the mixing strength of the fluids are improved by increasing the effective contact area between the fluids; commonly used configurations are split and elbow channel.

The existing main method for mixing different microfluids is to add a certain number of baffle grooves in a microfluid mixer, wherein the added baffle grooves can generate interference effect on fluid in a channel, increase the convection diffusion effect of fluid mixing, and simultaneously cause the flow loss of the fluid to be larger; the utility model realizes the high-efficiency mixing of two or more fluids only by changing the structure of the microfluid flow channel, so that the mixing time is short, the mixing flow channel is short, the fluids are fully mixed, and the mixing efficiency is greatly improved.

Disclosure of Invention

The utility model aims to provide a cylindrical mixer with a groove, which is used for further simplifying and optimizing the structure of a mixing channel; a cylindrical mixer with grooves comprises a first inlet (1), a second inlet (2), a third inlet (3), a fourth inlet (4), a fifth inlet (5), a sixth inlet (6), a mixing channel (7), a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12), a sixth groove (13) and an outlet (14); the mixer is characterized in that: six inlets (1-6) are a microchannel sheet with a rectangular section, the length of the microchannel sheet is 20 micrometers, and the height of the microchannel sheet is 10 micrometers; the mixing channel (7) is a cylindrical channel, the radius is 40 mu m, the length is 200 mu m, a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12) and a sixth groove (13) are symmetrically distributed at the positions of 50 mu m, 100 mu m and 150 mu m of the mixing channel, and the structure is semicircular; the outlet (14) is a circular outlet in cross-section with a radius of 40 μm.

The utility model provides a cylindrical mixer with recess, the solution that needs to mix pours into from first entry (1), second entry (2), third entry (3), fourth entry (4), fifth entry (5), sixth entry (6), mixing channel (7) flows through, because of colliding and touching first recess (8), second recess (9), third recess (10), fourth recess (11), fifth recess (12), the inner wall of sixth recess (13) causes the vortex to impel to carry out abundant mixing between the solution in mixing channel (7) space, flow out from export (14), thereby reach the function of mixed solution.

A cylindrical mixer with grooves is characterized in that a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12) and a sixth groove (13) are distributed on the inner wall of a mixing channel, and the deepest part of the mixing channel can reach 35 mu m; by distributing three groups of grooves with the same interval on the inner side of the mixing channel (7), the solution flows to touch the inner wall of the groove to generate vortex, so that the solution is more effectively and uniformly mixed, and each groove can be regarded as a part formed by cutting off a cuboid with the length of 80 mu m, the width of 35 mu m and the height of 5 mu m of the cylindrical mixing channel.

A cylindrical mixer with grooves, the mixing channel (7) is of a cylindrical structure as a whole and has a length of 200 μm.

The technical scheme of the utility model is that: a cylindrical mixer with grooves can generate vortex along the path around the grooves when solution flows through a mixing channel, the vortex is generated after the vortex is generated by a plurality of grooves and flows to an outlet pipeline, two solutions can be fully mixed in the mixing channel, and the expected mixing effect can be obtained.

The utility model is characterized in that: the cylindrical mixer with the groove has the advantages that the design structure of the mixing channel is simple and clear, compared with other mixers, the cylindrical mixer with the groove has a more optimized and simpler structure, the efficient mixing of solution can be realized, and the energy is saved.

Drawings

FIG. 1 is a schematic diagram of a cylindrical mixer with a groove, wherein: the mixing device comprises a first inlet (1), a second inlet (2), a third inlet (3), a fourth inlet (4), a fifth inlet (5), a sixth inlet (6), a mixing channel (7), a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12), a sixth groove (13) and an outlet (14).

FIG. 2 is a graph of the total internal flow flux of a cylindrical mixer with grooves to enhance bonding at each vortex to effect cleaning.

Fig. 3 is a graph of the internal concentration of a cylindrical mixer with a groove, where the inlet and outlet concentrations can be seen.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.

A cylindrical mixer with grooves comprises a first inlet (1), a second inlet (2), a third inlet (3), a fourth inlet (4), a fifth inlet (5), a sixth inlet (6), a mixing channel (7), a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12), a sixth groove (13) and an outlet (14).

Specifically, a cylindrical mixer with a groove has fluid characteristics such that when a solution flows through a mixing passage, a vortex is generated along a curved path around a baffle formed by the groove and flows toward an outlet pipe, the generated vortex sufficiently combines solutions of different concentrations, and when the solutions leave the mixer, the solutions of different concentrations can be sufficiently mixed.

Concretely, six cuboid grooves are distributed on the inner wall of a mixing channel of the cylindrical mixer with the grooves.

Specifically, the length of the micro-mixing channel of the present invention is not limited thereto, and the length thereof can be appropriately shortened or lengthened according to actual needs, so as to correspondingly reduce or increase the length of the whole device, so as to meet the actual separation needs.

Claims

1. A cylindrical blender with recess, characterized by: comprises a first inlet (1), a second inlet (2), a third inlet (3), a fourth inlet (4), a fifth inlet (5), a sixth inlet (6), a mixing channel (7), a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12), a sixth groove (13) and an outlet (14); six grooves are recessed in the walls of the mixing channel, respectively, and six inlets are embedded in the inlet side of the mixing channel.

2. A cylindrical mixer with grooves according to claim 1, wherein: the solution that needs to be mixed is injected from first entry (1), second entry (2), third entry (3), fourth entry (4), fifth entry (5), sixth entry (6), flows through mixing channel (7), in mixing channel (7) space because of colliding and touching first recess (8), second recess (9), third recess (10), fourth recess (11), fifth recess (12), the inner wall of sixth recess (13) causes the vortex and impels and carry out abundant mixing between the solution, flow out from export (14) to reach the function of mixed solution.

3. A cylindrical mixer with grooves according to claim 1, wherein: a first groove (8), a second groove (9), a third groove (10), a fourth groove (11), a fifth groove (12) and a sixth groove (13) are distributed on the inner wall of the mixing channel, and the deepest part of the mixing channel can reach 35 mu m; by distributing three groups of grooves with the same interval on the inner side of the mixing channel (7), the solution flows to touch the inner wall of the groove to generate vortex, so that the solution is more effectively and uniformly mixed, and each groove can be regarded as a part formed by cutting off a cuboid with the length of 80 mu m, the width of 35 mu m and the height of 5 mu m of the cylindrical mixing channel.

4. A cylindrical mixer with grooves according to claim 1, wherein: the mixing channel (7) is of a cylindrical structure as a whole and has the length of 200 mu m.

5. A cylindrical blender with recess, characterized by: six parts of a first inlet (1), a second inlet (2), a third inlet (3), a fourth inlet (4), a fifth inlet (5) and a sixth inlet (6) are all a microchannel sheet, the cross section of the microchannel sheet is rectangular, the length of the microchannel sheet is 20 micrometers, and the height of the microchannel sheet is 10 micrometers; the mixing channel (7) is a cylindrical channel, the radius is 40 μm, the length is 200 μm, and 6 grooves with semicircular structures are symmetrically distributed at the positions of 50 μm, 100 μm and 150 μm of the length; the outlet (14) is a circular outlet in cross-section with a radius of 40 μm.