Gradient dilution mixing device for solvent type fluorine-free waterproof agent

Abstract

The utility model discloses a kind of gradient dilution mixing devices of solvent type fluorine-free waterproof agent, multilayer disc-shaped mixing unit is vertically stacked along axis, form continuous stepped reaction space, not only utilize gravity natural guidance fluid downward step-by-step flow, prolongs mixed path, more in each layer, independent shear and turbulence area are created, cooperate with coaxial high-speed rotating stirrer, the fluid that passes through each disc-shaped cavity is subjected to sustained mechanical shear force and radial agitation, effectively break the molecular cohesion between different waterproof agent, prevent stratification or agglomeration, realize the integration of physical space and mechanical power in three-dimensional level, force material to experience multiple segmentation, reorganization and strong dispersion, to complete preliminary homogenization in extremely short time, improve the compatibility and stability of different formula system, ensure that waterproof agent chemical functional group is fully contacted and form uniform stable solution system, finally significantly enhance the application performance and batch consistency of product.

Description

Technical Field

[0001] This utility model relates to the technical field of waterproofing agent mixing device, and more particularly to a gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent. Background Technology

[0002] Solvent-based fluorine-free waterproofing agents are textile treatment auxiliaries that use organic solvents as carriers and do not contain perfluorinated compounds. Their core function is to create a low-surface-energy nanoscale polymer film on the surface of fabric fibers, making it difficult for water droplets to wet the surface and thus achieving a waterproof effect. Compared with traditional fluorinated waterproofing agents, their biggest advantage lies in their environmental friendliness, avoiding the potential risks to the environment and health posed by persistent organic pollutants, and complying with increasingly stringent global environmental regulations.

[0003] Gradient mixing is crucial in the preparation of such waterproofing agents because it directly affects the final performance and stability of the product. Due to the high viscosity and surface tension of high-concentration mother liquor, direct one-step mixing with a large amount of solvent can easily lead to the instantaneous precipitation and aggregation of solute molecules due to drastic changes in concentration and physical properties, forming irreversible particle or micelle defects. Employing a staged, gradient dilution method from high to low concentration, and applying sufficient mechanical shear at each dilution stage, provides a smooth transition for solute molecules and sufficient energy to ensure uniform dispersion in the solvent, thereby obtaining a homogeneous, stable, and reliable working solution.

[0004] In existing technologies, typical devices for gradient mixing often employ multiple stirred tanks or vessels connected in series, with materials being pumped sequentially from one mixing vessel to the next for gradual dilution. Another common form involves installing a series of static mixers in a pipeline, relying on the fluid flow itself to divide and merge the mixture. These are all relatively traditional and structurally dispersed mixing systems.

[0005] These existing devices generally suffer from low efficiency, large footprint, and high energy consumption. They lack sufficient control over the entire mixing process, especially the shear history and flow state experienced by the fluid. They are unable to accurately avoid local over-concentration or uneven shearing, which leads to quality fluctuations between product batches and even significantly reduces the waterproofing effect due to mixing defects.

[0006] Therefore, it is necessary to improve the existing gradient dilution mixing apparatus to solve the above problems. Summary of the Invention

[0007] This invention overcomes the shortcomings of the prior art by providing a gradient dilution mixing device for solvent-based fluorine-free waterproofing agents, aiming to solve the problem of uneven shearing in existing gradient dilution mixing devices.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent, comprising:

[0009] Hybrid matrix, used to provide a load-bearing matrix;

[0010] A mixing chamber, disposed inside the mixing matrix, is used to provide a mixing space for the waterproofing agent. The mixing chamber includes several mixing units, each of which is a disc-shaped cavity. The mixing units are distributed and connected sequentially from top to bottom, and are located on the same straight line and perpendicular to the horizontal plane.

[0011] A stirring rod is disposed in the mixing chamber and coaxially arranged with the mixing chamber, and is used to disperse and mix the waterproofing agent. The stirring rod is rotatably connected to the inner wall of the mixing chamber.

[0012] A stirring power unit, fixedly connected to the mixing matrix, is used to provide power to the stirring rod; and

[0013] The waterproofing agent port includes a waterproofing agent outlet and several waterproofing agent inlets, wherein the waterproofing agent outlet and several waterproofing agent inlets are respectively connected to the mixing chamber, and the several waterproofing agent inlets are disposed above the waterproofing agent outlet.

[0014] In a preferred embodiment of the present invention, each of the mixing units is provided with a spiral groove, and the spiral direction of the spiral grooves on the plurality of mixing units is consistent.

[0015] In a preferred embodiment of this utility model, the stirring rod is provided with a spiral fan blade, which is a double-layered reverse spiral fan blade.

[0016] In a preferred embodiment of this invention, a stirring hole is provided above the mixing matrix, and the diameter of the stirring hole is larger than the diameter of the stirring rod.

[0017] In a preferred embodiment of the present invention, the stirring rod is disposed in the stirring hole, the stirring rod is fixedly connected to the stirring power unit, and the stirring power unit is disposed above the mixing substrate.

[0018] In a preferred embodiment of the present invention, a stirring bracket is fixedly provided at the bottom of the mixing chamber, and the stirring bracket is rotatably connected to the stirring rod, and the stirring bracket is used to support the stirring rod.

[0019] In a preferred embodiment of this invention, several of the waterproofing agent inlets are respectively connected to the uppermost mixing unit.

[0020] In a preferred embodiment of this invention, a plurality of the waterproofing agent inlets are distributed along the circumference of the stirring rod.

[0021] In a preferred embodiment of this invention, the waterproofing agent outlet is coaxially arranged with the stirring rod.

[0022] In a preferred embodiment of this utility model, a collection chamber is provided on the mixing chamber, the collection chamber is connected to the lowest mixing unit, the collection chamber is connected to the waterproofing agent outlet, and the collection chamber is bowl-shaped.

[0023] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0024] (1) This utility model provides a gradient dilution mixing device for solvent-based fluorine-free waterproofing agents. Multi-layer disc-shaped mixing units are stacked vertically along the axis to form a continuous stepped reaction space. This not only utilizes gravity to naturally guide the fluid downwards step by step, extending the mixing path, but also creates independent shear and turbulence regions in each layer. With the high-speed rotating stirring rod coaxial with it, continuous mechanical shear force and radial stirring are applied to the fluid flowing through each disc cavity. Compared with the prior art, this effectively breaks the molecular cohesive force between solvent-based waterproofing agents of different viscosities and densities, prevents layering or agglomeration, and realizes the integration of physical space and mechanical power in three dimensions. This forces the material to undergo multiple divisions, recombinations and strong dispersions, thereby completing the initial homogenization in a very short time, improving the compatibility and stability of different formulation systems, ensuring that the chemical functional groups of the waterproofing agent are fully contacted and form a uniform and stable solution system, and ultimately significantly enhancing the application performance and batch consistency of the product.

[0025] (2) In this invention, when the double-layered counter-rotating fan blades rotate, the upper and lower blades generate axial thrust in opposite directions. The opposing shearing instantaneously tears, stretches and reassembles the material, enhancing the macroscopic turbulence intensity and interface renewal rate. Compared with the prior art, it breaks the phase interface between different waterproofing agent components, ensuring that the solute molecules can not only diffuse rapidly, but also achieve deep-level kinetic stability, thereby preparing a fluorine-free waterproofing agent product with high uniformity and excellent stability.

[0026] (3) In this utility model, the spiral groove changes the movement trajectory of the fluid at the microscopic level. Its consistent spiral direction gives the downward fluid a clear and uniform tangential motion component, strengthens the circumferential shear and overall vortex effect in the axial flow process, overcomes the mixing resistance caused by the difference in viscosity and surface tension of different waterproofing agents, and achieves rapid and fine primary emulsification compared with the prior art, ensuring that the solute and solvent undergo highly controllable and uniform shear in each mixing unit. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of a preferred embodiment of the present invention;

[0030] Figure 3 This is a preferred embodiment of the present invention. Figure 2 Enlarged view of point A in the middle;

[0031] In the diagram: 100, mixing matrix; 200, mixing chamber; 300, stirring rod; 310, spiral fan blade; 400, stirring power unit; 500, waterproofing agent inlet; 510, waterproofing agent outlet; 520, waterproofing agent inlet. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] like Figure 1 and Figure 2 As shown, a gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent includes:

[0034] Hybrid matrix 100 is used to provide a load-bearing matrix;

[0035] The mixing chamber 200 is disposed inside the mixing substrate 100 and is used to provide a mixing space for the waterproofing agent. The mixing chamber 200 includes several mixing units, each of which is a disc-shaped cavity. The several mixing units are distributed and connected from top to bottom, and are located on the same straight line and perpendicular to the horizontal plane.

[0036] A stirring rod 300 is disposed in the mixing chamber 200 and coaxially disposed with the mixing chamber 200, and is used to disperse and mix the waterproofing agent. The stirring rod 300 is rotatably connected to the inner wall of the mixing chamber 200.

[0037] A stirring power unit 400, fixedly connected to the mixing substrate 100, is used to provide power to the stirring rod 300; and

[0038] The waterproofing agent inlet 500 includes a waterproofing agent outlet 510 and several waterproofing agent inlets 520. The waterproofing agent outlet 510 and several waterproofing agent inlets 520 are respectively connected to the mixing chamber 200, and the several waterproofing agent inlets 520 are disposed above the waterproofing agent outlet 510.

[0039] Each mixing unit is equipped with a spiral groove, and the spiral direction of the spiral grooves on several mixing units is consistent. The spiral grooves microscopically change the fluid's motion trajectory, and their consistent spiral direction gives the downward fluid a clear and uniform tangential motion component, which greatly enhances the circumferential shear and overall vortex effect in the axial flow process.

[0040] When the high-speed rotating coaxial stirring rod 300 applies the main mechanical energy to the fluid, the inner wall of the groove acts like a static auxiliary blade, which not only further divides the fluid and increases its surface area, but also couples with the direction of motion of the stirring blade to jointly construct a strong and orderly three-dimensional composite flow field.

[0041] The initial mixing stage greatly enhances the mutual penetration and dispersion between fluids, effectively overcoming the mixing resistance caused by differences in viscosity and surface tension of different waterproofing agents. It achieves rapid and fine primary emulsification, ensuring that the solute and solvent undergo highly controllable and uniform shearing in each mixing unit, thereby eliminating mixing dead zones and significantly improving the uniformity, stability and chemical reliability of the final diluted solution, providing a key guarantee for obtaining high-quality fluorine-free waterproofing agent products.

[0042] like Figure 3 As shown, the stirring rod 300 is equipped with a spiral fan blade 310, which is a double-layered counter-rotating spiral fan blade 310. When the double-layered counter-rotating fan blade rotates, the upper and lower blades generate axial thrusts in opposite directions. One force pushes the fluid downward to accelerate longitudinal circulation, while the other forms an upward counter-current to violently tumble the fluid. This counter-shearing instantaneously tears, stretches, and reorganizes the material, greatly enhancing the macroscopic turbulence intensity and interface renewal rate.

[0043] When the bidirectional flow field meets the directional spiral grooves on the inner wall of the mixing unit, the static grooves and dynamic blades guide the fluid together, forming a highly ordered and multiplied three-dimensional turbulence, so that the fluid undergoes extremely thorough division and displacement within each mixing chamber 200.

[0044] It completely breaks down the phase interface between different waterproofing agent components, achieving micro-dispersion and instantaneous homogenization far exceeding conventional stirring, effectively overcoming the mixing dead zone problem that is easily generated by high viscosity fluids. This extremely enhanced directional mixing mode ensures that solute molecules can not only diffuse rapidly, but also achieve deep-level kinetic stability, thereby preparing fluorine-free waterproofing agent products with high uniformity, excellent stability and superior application performance, completely eliminating quality defects such as stratification and precipitation.

[0045] A stirring hole is provided above the mixing substrate 100, and the diameter of the stirring hole is larger than the diameter of the stirring rod 300. This effectively avoids friction between the high-speed rotating stirring rod 300 and the substrate due to thermal expansion or slight deformation, ensuring stable power transmission and safe operation of the equipment. At the same time, the hole also provides additional buffering and adjustment space for the axial movement of the fluid.

[0046] When combined with the strong bidirectional flow field generated by the internal double-layer reverse spiral fan blades 310 and the spiral grooves on the inner wall of the mixing unit, this upper space becomes a key area for the natural release of fluid pressure and the formation of a larger vortex. It allows some of the upward-push fluid to fully flow back and tumble here, and to premix with the newly injected material, greatly enhancing the smoothness of the overall circulation and the utilization rate of the mixing volume.

[0047] Eliminating any potential mixing dead zones makes the fluid shearing within the entire system more uniform, achieving unobstructed and efficient dispersion and fusion from inlet to outlet. This dynamically stable open structure ensures the ultimate reliability and repeatability of the mixing process under continuous high-speed operation, ultimately laying a solid mechanical foundation for ensuring the preparation of fluorine-free waterproofing agents with ultimate uniformity, long-term storage stability, and excellent performance in every batch.

[0048] A stirring rod 300 is disposed in a stirring hole and is fixedly connected to a stirring power unit 400, which is positioned above the mixing substrate 100. This ensures direct and stable drive of the stirring rod 300 by the power unit, completely eliminating potential energy loss and vibration in the transmission process, and enabling the double-layer counter-rotating spiral fan blades 310 to accurately output the powerful bidirectional shear force required by the design.

[0049] The appropriate gap between the stirring hole and the rod body avoids friction and, together with this open space, forms a key hub for fluid circulation. When the power unit is running stably, the powerful torque it generates is efficiently converted into the mechanical energy of the fan blades through the stirring rod 300. This energy is then integrated with the spiral grooves on the inner wall of the disc-shaped unit and the deep gravity flow, creating a highly ordered three-dimensional composite flow field with multiplied intensity within each mixing chamber 200. Furthermore, the upper buffer space promotes the vigorous turbulence and full-area circulation of the material.

[0050] It achieves efficient and uniform energy transfer from the power source to the mixing end, ensuring high-speed shearing and micro-dispersion without dead angles throughout the system. This enables waterproofing agent components of different viscosities to achieve fine emulsification at the molecular level in a very short time, improving the batch consistency and chemical stability of the product. It provides crucial engineering support for the preparation of high-end fluorine-free waterproofing agents with excellent waterproofing performance and long-term storage stability, while significantly enhancing the reliability and durability of equipment operation.

[0051] A stirring bracket is fixedly installed at the bottom of the mixing chamber 200. The stirring bracket is rotatably connected to the stirring rod 300 and is used to support the stirring rod 300. It provides crucial bottom radial support for the high-speed rotating stirring rod 300, greatly enhancing its rotational stability and effectively suppressing vibration, oscillation, or uneven wear that may be caused by the strong bidirectional axial thrust and torque generated by the double-layer counter-rotating spiral fan blades 310. This ensures that the stirring rod 300 and each disc-shaped mixing unit always maintain a precise coaxial relationship.

[0052] When the stirring rod 300 is running stably under the drive of the power unit, the rigid support at the bottom enables it to efficiently convert all the torque into the shear force of the fan blades, thereby deeply coupling with the spiral grooves on the inner wall, forming an extremely stable and high-intensity, high-precision three-dimensional composite shear flow field in each mixing chamber 200, completely eliminating the uneven mixing caused by shaft end vibration.

[0053] It achieves ultimate uniformity and controllability of fluid dynamics throughout the entire mixing chamber 200 from top to bottom, enabling different waterproofing agent components to achieve completely consistent dispersion when undergoing multi-layer and multi-directional shearing. This achieves unprecedented micro-mixing precision and efficiency, ensuring unparalleled batch-to-batch consistency and chemical stability of the final product. At the same time, it significantly reduces equipment maintenance requirements, providing a solid and reliable equipment foundation for the continuous and large-scale production of high-performance fluorine-free waterproofing agents.

[0054] Several waterproofing agent inlets 520 are connected to the uppermost mixing unit. This ensures that all raw materials enter the primary mixing chamber 200 from the same plane at the top of the device, exposing them to the most intense initial shear field generated by the double-layered counter-rotating spiral fan blades 310 from the very beginning of mixing. This instantly achieves high-intensity pre-dispersion and preliminary emulsification of multiple components, laying a uniform starting point for subsequent deep mixing. As this initially cut mixture flows through the lower disc-shaped mixing units under the strong push of the fan blades and the action of gravity, it continuously couples with the spiral grooves on the inner wall of each layer and the continuously acting counter-rotating shear force, resulting in a clear, progressively deepening gradient enhancement effect in the mixing process.

[0055] This eliminates the possibility of localized excessive concentrations, agglomeration, or stratification caused by stepwise or staggered feeding, ensuring that the material undergoes continuous, uniform, and increasingly enhanced dispersion throughout the entire downward flow process. This improves the reproducibility of the process between different batches and ultimately guarantees that the prepared fluorine-free waterproofing agent product has an extremely uniform chemical composition, excellent stability, and highly reliable waterproofing performance.

[0056] Several waterproofing agent inlets 520 are distributed around the circumference of the stirring rod 300, and the waterproofing agent outlets 510 are coaxially arranged with the stirring rod 300. The circumferentially distributed inlets ensure that various raw materials are injected symmetrically and evenly into the top mixing chamber 200, so that they are instantly captured and entrained by the high-speed rotating double-layer counter-rotating spiral fan blades 310. This completely avoids the jetting or excessively high local concentration that may occur due to single-point feeding, and achieves the ultimate initial dispersion from the beginning of mixing.

[0057] A complete, uniform, and efficient mixing path was constructed, from radial uniform feeding and axial gradient deepening to centrally symmetrical discharge. This ensures that the shear history of the material is highly consistent throughout the entire process, guaranteeing that the final product has unparalleled batch-to-batch consistency, excellent storage stability, and waterproof performance. At the same time, it significantly improves the stability and reliability of the entire continuous production process.

[0058] A collection chamber is provided on the mixing chamber 200. The collection chamber is connected to the lowest mixing unit and communicates with the waterproofing agent outlet 510. The collection chamber is bowl-shaped. The bowl-shaped structure provides a natural convergence and slowing-down transition space for the material flowing out from the last stage mixing unit. Its smooth arc-shaped inner wall effectively eliminates the flow dead zone and eddies that are easily generated by right-angle structures, allowing the mixture that has undergone high-intensity shear to smoothly turn here and flow evenly to the coaxial outlet.

[0059] When combined with the continuous downward thrust generated by the internal double-layer reverse spiral fan blades 310 and the action of gravity, the bowl-shaped design of the collection chamber ensures that the material can smoothly and completely leave the mixing area, completely avoiding residue or local accumulation. At the same time, its buffering characteristics also help to release tiny air bubbles that may be entrained in the fluid.

[0060] This achieves a seamless transition from vigorous mixing to stable output, ensuring the extreme uniformity and optical clarity of the discharged fluid. It eliminates product quality fluctuations caused by poor outlet flow or turbulence, improves the reliability and repeatability of the entire mixing process, and ensures that each batch of fluorine-free waterproofing agent products achieves highly consistent chemical composition, storage stability, and final application performance, providing a key guarantee for continuous large-scale production.

[0061] The mixing substrate 100 is a tank or shell, providing structural support and sealing; the mixing chamber 200 and its internal disc-shaped mixing unit are cavities; the stirring rod 300 and its double-layered counter-rotating spiral fan blades 310 constitute a specially designed stirring shaft and stirring blade assembly, providing both upward and downward shearing forces; the stirring power unit 400 is the motor that drives the stirring shaft to rotate; the waterproofing agent inlet 520 and waterproofing agent outlet 510 are assemblies of fluid interfaces, pipes, and valves; the bowl-shaped collecting chamber is a conical or arc-shaped outlet collection area at the bottom of the tank, designed to allow the fluid to flow out smoothly.

[0062] In use, various waterproofing agent raw materials are simultaneously injected into the uppermost mixing unit from the circumferentially distributed inlets at the top. They are immediately captured and subjected to intense initial shearing by the high-speed rotating double-layer reverse spiral fan blades 310. Driven by the fan blades and under the action of gravity, the mixed materials flow sequentially through the disc-shaped mixing units embedded with spiral grooves in each layer. They are gradually and finely dispersed in the continuously enhanced reverse shearing and eddy currents. Finally, the homogeneous solution that has been mixed is collected in the bowl-shaped collection chamber at the bottom. After being buffered, it is smoothly discharged from the coaxial outlet, completing the entire gradient dilution and mixing process.

[0063] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent, characterized in that, include: Hybrid matrix (100) is used to provide a load-bearing matrix; A mixing chamber (200) is disposed inside the mixing substrate (100) to provide a mixing space for the waterproofing agent. The mixing chamber (200) includes a plurality of mixing units, each of which is a disc-shaped cavity. The plurality of mixing units are distributed and connected from top to bottom, and are located on the same straight line and perpendicular to the horizontal plane. A stirring rod (300) is disposed in the mixing chamber (200) and coaxially arranged with the mixing chamber (200) for dispersing and mixing the waterproofing agent. The stirring rod (300) is rotatably connected to the inner wall of the mixing chamber (200). A stirring power unit (400), fixedly connected to the mixing matrix (100), is used to provide power to the stirring rod (300); and The waterproofing agent port (500) includes a waterproofing agent outlet (510) and a plurality of waterproofing agent inlets (520), wherein the waterproofing agent outlet (510) and the plurality of waterproofing agent inlets (520) are respectively connected to the mixing chamber (200), and the plurality of waterproofing agent inlets (520) are disposed above the waterproofing agent outlet (510).

2. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: Each of the mixing units is provided with a spiral groove, and the spiral direction of the spiral grooves on several mixing units is consistent.

3. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: The stirring rod (300) is provided with a spiral fan blade (310), which is a double-layered reverse spiral fan blade (310).

4. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: A stirring hole is provided above the mixing matrix (100), and the diameter of the stirring hole is larger than the diameter of the stirring rod (300).

5. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 4, characterized in that: The stirring rod (300) is disposed in the stirring hole, and the stirring rod (300) is fixedly connected to the stirring power unit (400). The stirring power unit (400) is disposed above the mixing substrate (100).

6. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: A stirring bracket is fixedly provided at the bottom of the mixing chamber (200), and the stirring bracket is rotatably connected to the stirring rod (300). The stirring bracket is used to support the stirring rod (300).

7. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: Several of the waterproofing agent inlets (520) are respectively connected to the uppermost mixing unit.

8. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: Several of the waterproofing agent inlets (520) are distributed around the circumference of the stirring rod (300).

9. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: The waterproofing agent outlet (510) is coaxially arranged with the stirring rod (300).

10. The gradient dilution mixing device for a solvent-based fluorine-free waterproofing agent according to claim 1, characterized in that: The mixing chamber (200) is provided with a collection chamber, which is connected to the mixing unit at the bottom and communicates with the waterproofing agent outlet (510). The collection chamber is bowl-shaped.

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