Magnetic force driven grid ring microchannel liquid mixing device

Abstract

The utility model discloses a kind of magnetic drive grid ring microchannel liquid mixing device, it relates to a kind of liquid mixing device.The utility model uses modularization magnetic drive, pre-dispersion and shearing breakage are carried out to premixed liquid by grid structure, three-stage Archimedes spiral microchannel design is adopted in mixed channel, wherein inlet passage layer is configured annular average arrangement rectangular cross section microchannel, secondary mixing passage layer adopts spiral channel from circle center to outer periphery, tertiary mixing passage layer is the spiral channel of circumferential flow to circle center, through the synergistic effect of eddy current and shear force induced by spiral gradually expanding structure, realize two liquid efficient mass transfer.The utility model has the advantages of modularization easy disassembly replacement and active mixing, through the synergistic effect of magnetic drive multistage mixing unit, significantly improve the dispersion uniformity and mixing efficiency of material in microchannel, suitable for fine chemical and biological pharmaceutical technology field etc.

Description

Technical Field

[0001] This utility model relates to a liquid mixing device, specifically a magnetically driven grid ring microchannel liquid mixing device. Background Technology

[0002] In the field of chemical engineering, liquid-liquid mixing and reaction are crucial steps in the process, thus creating an urgent need for technologies and devices to enhance liquid-liquid mixing. Traditional passive liquid-liquid mixers are inefficient, and thorough mixing of the two liquid phases is essential for improving product quality. This is especially true for traditional microchannel mixing, which suffers from low process efficiency and limited mass transfer. Innovation in areas such as low reaction efficiency, poor reaction selectivity, and miniaturization needs improvement, and the intersection of microfluidic technology and chemical reaction engineering urgently needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetically driven grid ring microchannel liquid mixing device. This invention adopts a laboratory-grade compact liquid-liquid microreactor. Through modular structure optimization, the device is easy to assemble and disassemble. At the same time, the flow channel topology configuration is used to enhance the mass transfer process of the two liquids. Ultimately, it achieves a dual improvement in operation and maintenance convenience and mixing enhancement, and is particularly suitable for microprocess conditions requiring frequent and precise maintenance.

[0004] The present invention adopts the following technical solution: A magnetically driven microchannel liquid mixing device with a grid ring includes a magnetic wheel cover, an active magnetic wheel, a first feeding channel layer, an upper rubber pad, a second feeding channel layer, a liquid-liquid initial mixing grid ring, a stirring grid ring, a rubber pad, a secondary mixing channel layer, a lower rubber pad, a tertiary mixing channel layer, bolts, and nuts. The magnetic wheel cover fixes the active magnetic wheel, which is equipped with a permanent magnet. The active magnetic wheel shaft is connected to a motor, and a rolling ball is provided at the bottom. The first feeding channel is a circular liquid inlet channel with an arc-shaped groove at the top that matches the rolling ball structure to position the active magnetic wheel; the bottom has an annular groove with a rubber pad installed on the outside. The second feeding channel is a square liquid inlet channel. The upper part is provided with two annular grooves for installing the liquid-liquid primary mixing grid ring and the stirring ring. The lower part is provided with rolling beads. The bottom has an installation groove for installing rubber pads. The liquid-liquid primary mixing grid ring consists of upper and lower annular parts and a middle grid, containing four equidistant permanent magnets; the lower part is equipped with rolling beads, the annular part cooperates with the liquid flow groove of the feed channel layer, and multiple guide holes are set in the annular area. The central region of the secondary mixing channel layer is a small circular groove, and the outer periphery is set with an annular groove. The microchannels are arranged in a spiral shape, and two guide holes are provided on the outside. The three-stage mixing channel layer has a circular guide hole in the center, an annular groove on the outside, and a rubber pad installed on the outside. The rubber pad is placed between the first feed channel layer, the second feed channel layer, the secondary mixing channel layer, and the tertiary mixing channel layer; The beneficial effects of this utility model are as follows: 1. This invention achieves efficient mixing based on the special structure of its channel. The device features a magnetic traction uniform stirring structure, which can ensure thorough mixing of the liquid and liquid phases. The Archimedes spiral microchannel used in this invention solves the problems of low mixing efficiency and limited mass transfer in traditional microchannels through its unique geometric design. It has significant advantages in improving reaction efficiency, controlling reaction selectivity, and achieving miniaturization. The combination of the Archimedes spiral microchannel and the magnetic wheel demonstrates the innovative advantages of the intersection of microfluidic technology and chemical reaction engineering.

[0005] 1. This utility model, by setting up a magnetic wheel cover, a multi-layer liquid inlet channel layer, a liquid-liquid primary mixing grid ring, a stirring grid ring, and a rubber pad, uses magnetic force to rotate the stirring ring and the liquid-liquid primary mixing grid ring in a non-contact manner, ensuring the sealing of the device and allowing the two liquids to be well stirred before entering the microchannel. The rotating structure of the liquid-liquid primary mixing grid ring allows for the simultaneous multi-component distribution and mixing of the two liquids.

[0006] 2. This utility model, by setting up a magnetic wheel cover, a multi-layer liquid inlet channel layer, a liquid-liquid initial mixing grid ring, a stirring ring and a rubber pad, adopts multiple sets of annularly arranged Archimedean spiral microchannels. Under the condition of equal axial distance, it enhances the radial mixing of liquid between channels, reduces mixing time and makes the mixing more thorough. Attached Figure Description

[0007] Figure 1 This is a front sectional view of the liquid-liquid mixing device of this utility model; Figure 2 This is a front view of the liquid-liquid mixing device of this utility model; Figure 3 This is a top side view of the active magnetic wheel component of this utility model; Figure 4 This is a top side view of the feed channel layer component of this utility model; Figure 5 This is a side top view of the liquid-liquid initial mixing grid wheel component of this utility model; Figure 6 This is a top view of the secondary mixing channel layer component of this utility model.

[0008] In the diagram: 1. Magnetic wheel cover; 2. Active magnetic wheel; 3. Feeding channel layer 1; 4. Upper rubber pad; 5. Feeding channel layer 2; 6. Liquid-liquid primary mixing grid ring; 7. Stirring grid ring; 8. Rubber pad; 9. Secondary mixing channel layer; 10. Lower rubber pad; 11. Tertiary mixing channel layer; 12. Bolt; 13. Nut. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0010] The present invention relates to a magnetically driven grid ring microchannel liquid mixing device: Magnetic wheel cover and active magnetic wheel: The magnetic wheel cover fixes the active magnetic wheel, which has eight permanent magnets. When it rotates, it drives the liquid-liquid initial mixing grid ring and the stirring ring. The active magnetic wheel shaft is connected to the motor, and the lower part is equipped with a ball bearing structure to reduce rotational resistance.

[0011] Feed Channel Layer: This layer features a circular liquid inlet channel and an arc-shaped groove at the top that mates with the rolling ball structure to effectively position the active magnetic wheel. The bottom has an annular groove where the liquid flows, and an external rubber gasket maintains a tight seal.

[0012] Two-channel feed layer: Includes a square inlet channel, with two annular grooves at the top for installing the liquid-liquid primary mixing grid ring and stirring ring, and a rolling ball structure at the bottom. The liquid flows through a spiral microchannel and enters the secondary mixing layer, with a mounting groove at the bottom for installing rubber pads.

[0013] Liquid-liquid primary mixing grid ring: Composed of upper and lower annular sections and a central grid, containing four equidistant permanent magnets. The lower part has a rolling ball structure to reduce rotational resistance. The annular section engages with the liquid flow grooves in the feed channel layer. Multiple guide holes are provided in the annular area to facilitate the introduction of material into the center of each grid for mixing with another material.

[0014] Stirring ring: Similar to the liquid-liquid initial mixing grid ring, it is used to stir two liquids to achieve rapid mixing. The rolling ball structure at the bottom reduces resistance.

[0015] Secondary mixing channel layer: The central area is a small circular groove, and the outer periphery is set with annular grooves. The microchannels are arranged in a spiral shape, and there are two guide holes on the outside to allow the mixture to flow to the tertiary mixing channel layer.

[0016] Tertiary mixing channel layer: The structure is similar to that of the secondary mixing channel layer, with a circular guide hole in the center and an annular groove on the outside. Microchannels connect the two and a rubber pad is installed on the outside.

[0017] Rubber gasket: Used between the first feed channel layer, the second feed channel layer, the secondary mixing channel layer, and the tertiary mixing channel layer to ensure sealing.

[0018] Assembly method: Each layer of components is fixed with bolts and nuts. The bolt holes are located at diagonal positions of the device to ensure a tight fit, good sealing and stability, and easy disassembly and cleaning.

[0019] The process of this invention, a magnetically driven grid ring microchannel liquid mixing device, is as follows: Fluid input and premixing: Liquid is injected through the square inlet of the second feed channel, and after filling the annular tank, another liquid is introduced. The liquid injected through the square inlet of the second feed channel is the continuous phase, and the other liquid introduced after filling the annular tank is the dispersed phase.

[0020] The active magnetic wheel 2 drives the liquid-liquid primary mixing grid wheel 6 to rotate. Liquid is injected from the square inlet of the feed channel 2, flows through the guide hole above the grid to fill the annular groove, and is then introduced into another liquid. Gravity and inertia cause the liquid to move towards the center, forming a liquid-liquid collision interface.

[0021] 2. Dynamic dispersion and shearing: The stirring grid wheel 7 rotates at high speed, cutting liquid microparticles into smaller-scale dispersed phases, significantly increasing the contact area.

[0022] The mixture enters the secondary mixing channel layer 9 through the arc-shaped channel, and the spiral microchannel induces radial vortex, which enhances axial mixing.

[0023] 3. Mass transfer optimization of helical channels: Primary spiral segment (center → outer periphery): The material flows in the spiral gradually expanding structure, generating axial vortices, which breaks the laminar boundary layer and promotes turbulent mixing.

[0024] Secondary helical segment (outer periphery → center): The reverse helical design creates a gradient velocity field, prolongs the residence time, and avoids short-circuit flow.

[0025] Spiral expansion effect: Periodic changes in the channel cross-section induce periodic interface rupture and recombination, improving microscopic mass transfer efficiency.

[0026] 4. Product output: The mixture flows out through the central outlet of the three-stage mixing channel layer 11, completing the efficient liquid-liquid mixing reaction. Example

[0027] This utility model device adopts modular magnetic drive, and its core components include a magnetic drive module and a microchannel structure module. In the magnetic module, an external motor drives the liquid-liquid initial mixing grid wheel and the stirring grid wheel to rotate without contact. The grid structure pre-disperses and shears the premixed liquid, ensuring the overall sealing of the device. The mixing channel adopts a three-stage Archimedean spiral microchannel design. The inlet channel layer is configured with rectangular cross-section microchannels arranged in annularly. The secondary mixing channel layer uses a spiral channel from the center outwards, and the tertiary mixing channel layer is a spiral channel flowing from the circumference to the center. Through the spiral expanding structure, eddies and shear forces are induced to work synergistically, achieving efficient mass transfer between the two liquids.

[0028] The device of this utility model consists of, from top to bottom, a magnetic wheel cover 1, an active magnetic wheel 2, a first feeding channel layer 3, a second feeding channel layer 5, an upper rubber pad 4, a rubber pad 8, and a lower rubber pad 10 for maintaining sealing, a liquid-liquid initial mixing grid ring 6 to accelerate mixing, a stirring grid ring 7, a secondary mixing channel layer 9 for fully mixing materials, a tertiary mixing channel layer 11, and bolts 12 and nuts 13 for fixing the device. The liquid-liquid initial mixing grid ring 6 has an inlet hole above it that connects to the second feeding channel layer 3 and the second feeding channel layer 5. The center of the second feeding channel layer 5 and the secondary mixing channel layer 9 has an outlet hole that connects to the next layer, so that the mixture enters different channels sequentially for mixing. Finally, the mixture flows out from the center outlet hole of the tertiary mixing channel layer 11. The rotation direction of each channel is different.

[0029] The microchannel mixing device of this invention has an active magnetic wheel 2 with eight permanent magnets, which drive the liquid-liquid initial mixing grid ring 6 and the stirring grid ring 7 to rotate, and the bottom ball bearings effectively reduce resistance loss.

[0030] The microchannel mixing device has a feed channel layer 5 comprising two annular grooves for placing a liquid-liquid initial mixing grid ring 6 and a stirring grid ring 7. The central circular area has several Archimedean spiral liquid-liquid mixing microchannels evenly arranged along the annular direction. The channel cross-section is rectangular, and a guide hole is provided in the central area.

[0031] The microchannel mixer's feed channel layer 5 houses a liquid-liquid primary mixing grid ring 6 and a stirring grid ring 7. A magnetic wheel 2 drives the two primary mixing grid rings 6 and the stirring grid ring 7 to rotate. The liquid-liquid primary mixing grid ring 6 and the stirring grid ring 7 have similar structures, but the grid of the liquid-liquid primary mixing grid ring 6 is larger, allowing for a tighter fit with the annular groove of the feed channel layer 5, and an inlet is provided at the top of the grid to introduce liquid. The grid of the stirring grid ring 7 is smaller. Both the liquid-liquid primary mixing grid ring 6 and the stirring grid ring 7 have a ball-bearing rolling structure, effectively reducing resistance loss during rotation. The liquid-liquid primary mixing grid ring 6 and the stirring grid ring 7 have four grids, each composed of permanent magnets, which are the force points for their rotation.

[0032] Both the secondary mixing channel layer 9 and the tertiary mixing channel layer 11 of the microchannel mixing device have several Archimedean spiral multi-material mixing channels evenly arranged along the annular direction. The microchannels of the secondary mixing channel layer 9 flow from the center to the periphery, and an annular groove is set at the end of the channel with two guide holes at the bottom of the groove. The microchannels of the tertiary mixing channel layer 11 flow from the periphery to the center. The two channel layers have the same number of microchannels, and the channel cross-section is rectangular. A material outlet is set in the center of the tertiary mixing channel layer 11, through which the uniformly mixed material flows out.

[0033] The structure of the microchannel mixing device, including the rubber pad 4, rubber pad 8, and lower rubber pad 10, varies depending on the position of the guide holes in the feed channel layer 5, the secondary mixing channel layer 9, and the tertiary mixing channel layer 11.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and patent concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A magnetically driven grid ring microchannel liquid mixing device, characterized in that, The device includes a magnetic wheel cover (1), an active magnetic wheel (2), a first feeding channel layer (3), an upper rubber pad (4), a second feeding channel layer (5), a liquid-liquid initial mixing grid ring (6), a stirring grid ring (7), a rubber pad (8), a secondary mixing channel layer (9), a lower rubber pad (10), a tertiary mixing channel layer (11), bolts (12), and nuts (13). The magnetic wheel cover fixes the active magnetic wheel, which is equipped with a permanent magnet. The active magnetic wheel shaft is connected to a motor, and a rolling ball is provided at the bottom. The first feeding channel layer is a circular liquid inlet channel with an arc-shaped groove at the top that matches the structure of the rolling ball to position the active magnetic wheel. An annular groove is provided at the bottom, and a rubber pad is installed on the outside. The second feeding channel layer is a square liquid inlet channel. The system comprises four feed channels: an upper section with two annular grooves for installing a liquid-liquid primary mixing grid ring and a stirring ring; a lower section with rolling beads; and a bottom mounting groove for installing a rubber pad. The liquid-liquid primary mixing grid ring consists of upper and lower annular sections and a central grid, containing four equidistant permanent magnets. The lower section has rolling beads, and the annular section engages with the liquid flow groove of the first feed channel layer. Multiple guide holes are provided in the annular area. The secondary mixing channel layer has a small circular groove in the center, surrounded by annular grooves. The microchannels are arranged in a spiral shape, and two guide holes are provided on the outside. The tertiary mixing channel layer has a circular guide hole in the center, an annular groove on the outside, and a rubber pad installed on the outside. The rubber pad is located between the first feed channel layer, the second feed channel layer, the secondary mixing channel layer, and the tertiary mixing channel layer.

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