A stirring device for improving the uniformity of organic pigments

Abstract

The application discloses a kind of organic stirring devices for improving the uniformity of organic pigment, and it relates to the technical field of organic pigment production and processing;Including container mechanism, container mechanism includes container;Container is provided with stirring assembly;The lower portion of container mechanism is provided with barrel bottom assembly;Barrel bottom assembly includes bottom mechanism, bottom mechanism includes hemispherical bottom shell, three equal parts of inner wall of bottom shell are respectively provided with annular grooves, the cross section of groove is drop-shaped, the inner wall of bottom shell is equidistantly and uniformly fixedly connected with annularly arranged convex edges, the cross section of convex edge is trapezoidal, the part of convex edge corresponding to groove is provided with notch;Bottom anchor mechanism is provided in bottom mechanism, bottom anchor mechanism includes stand, the lower end of stand is fixedly connected with anchor paddle, anchor paddle is in the posture of inclination and upwardly coiled, the continuity of organic pigment stirring process is optimized, and dispersion uniformity is improved.

Description

Technical Field

[0001] This invention relates to the field of organic pigment production and processing technology, specifically to a stirring device for improving the uniformity of organic pigments. Background Technology

[0002] Organic pigments are insoluble organic compounds, typically added to substrates in a highly dispersed state to color them. The fundamental difference between them and dyes is that dyes dissolve in the dyeing medium, while pigments are insoluble in both the medium and the substrate. Many pigments and dyes share the same chemical structure, and different application methods can lead to their interconversion. For example, some vat dyes and sulfur vat dyes, when reduced to their leuco forms, can be used as fiber dyes; otherwise, they can be used as pigments in high-grade inks. Organic pigments are widely used in inks, paints, coatings, doping of synthetic fibers, as well as in coating printing of fabrics, and coloring of plastics, rubber, and leather, with inks having the largest pigment usage. As an important class of coloring materials, organic pigments are applied in numerous industrial fields such as coatings, inks, plastics, rubber, and textiles. Their dispersion uniformity directly determines the color consistency, color strength, and performance of the final product. In high-end applications, such as automotive original equipment paints and high-end printing inks, small pigment color differences and small particle size distribution standard deviations are required, placing extremely high demands on the stirring and dispersion process.

[0003] Patent CN106964272A discloses an organic pigment stirring device, which includes a tank vertically mounted above a support frame. A first stirring mechanism is located at the top of the tank, comprising a first motor and a first stirring shaft. The first stirring shaft is vertically mounted and its upper end is connected to the first motor. The first stirring shaft extends into the tank, with its lower end near the middle of the tank. A propeller blade is mounted on the first stirring shaft, which, when rotating with the first stirring shaft, pushes the surrounding liquid downwards. A second stirring mechanism is located at the lower part of the tank's sidewall, comprising a second motor and a second stirring shaft. The second stirring shaft is horizontally mounted and one end is connected to the second motor. Multiple straight-plate-shaped blades, perpendicularly connected to the second stirring shaft, are spaced apart on the second stirring shaft and located within the tank. A liquid inlet and a solid inlet are located at the top of the tank, and a slurry outlet is located at the bottom of the tank.

[0004] The traditional mixing devices currently used in the industry have the following technical bottlenecks: they generally use flat-bottomed or conical-bottomed containers, which easily form vortex dead zones at the corners, causing a small number of pigment particles to remain for a long time. This is especially true for low-flow pigments, where bottom deposition and sidewall adhesion are severe, directly affecting the uniformity of mixing. The mixing blades are mostly straight or standard anchor-type designs, which are difficult to adapt to pigment particles with different agglomeration intensities. In addition, lightly agglomerated particles may break due to excessive shearing, while tightly agglomerated particles may remain due to insufficient shearing, ultimately resulting in excessive deviations in particle size distribution.

[0005] These problems result in insufficient mixing uniformity of organic pigments produced by traditional equipment, significant color differences, and large standard deviations in particle size distribution, failing to meet the quality standards of the high-end market. Therefore, developing a stirring device that improves the uniformity of organic pigments has become crucial for solving the problem of organic pigment dispersion. Summary of the Invention

[0006] The purpose of this invention is to provide a stirring device for improving the uniformity of organic pigments, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an organic stirring device for improving the uniformity of organic pigments, comprising a container mechanism, the container mechanism comprising a container, a lid fastened to the upper port of the container, a motor fixedly connected to the middle of the upper surface of the lid, and the output end of the motor passing through the lid and fixedly connected to a main shaft; The container is equipped with a stirring assembly; A bottom cylinder assembly is provided below the container mechanism; A frame mechanism is provided on the outside of the container mechanism; The bottom assembly includes a bottom mechanism, which includes a hemispherical bottom shell. The upper end of the bottom shell is fixedly connected to a container, and the lower end of the bottom shell is fixedly connected to a discharge port for discharging materials. Annular grooves are formed at three equal divisions of the inner wall of the bottom shell, and the cross-section of the grooves is teardrop-shaped. Annularly arranged protruding ribs are fixedly connected to the inner wall of the bottom shell at equal intervals. The cross-section of the protruding ribs is trapezoidal, and notches are formed in the portions of the protruding ribs corresponding to the grooves. The bottom mechanism is equipped with a bottom anchor mechanism for stirring. The bottom anchor mechanism includes a column that is fixedly connected to the main shaft. Anchor blades that are evenly and equidistantly fixed to the lower end of the column are close to the inner wall of the bottom shell. The anchor blades are inclined and spiral upward. An ultrasonic vibrator is fixedly connected to the end of each anchor blade.

[0008] As a preferred embodiment of the present invention, an inlet is provided through one side of the surface of the lid.

[0009] As a preferred embodiment of the present invention, the stirring assembly includes, from top to bottom, a flow guiding stirring mechanism, a middle stirring mechanism, and a perforation mechanism; The flow guiding and stirring mechanism includes two main sleeves that are fixedly fitted onto the main shaft. The two main sleeves are fitted together vertically. Each main sleeve has a rotating shaft that is equidistantly and evenly connected to the outer side via bearings. The outer end of the rotating shaft is fixedly connected to a spiral ribbon propeller that gradually extends from the root to the end. The upper and lower main sleeves have staggered spiral propellers.

[0010] The central stirring mechanism includes two symmetrically arranged dispersing discs, with one side of each disc facing away from the other forming a cone. Each of the dispersion discs has a feed hole through the center of its surface. A bushing that is fixedly fitted to the main shaft is centrally located in the feed hole. A crossbar that passes through the dispersion disc is fixedly connected to the outer side of the bushing at equal intervals. The outer end of the crossbar is attached to the container. Two dispersion discs are fixedly connected with serrations at equal intervals on their adjacent sides, and the ends of the serrations on the upper and lower dispersion discs are deflected in different directions.

[0011] The perforation mechanism includes a ring of perforated cylinders, the upper end of which is recessed and inclined toward the axis of the container. A cylinder rod is fixedly connected to the outer side of the middle part of the perforated cylinder, and the outer end of the cylinder rod is fixedly connected to the container.

[0012] The outer side of the bottom mechanism is provided with a heat preservation mechanism for temperature control. The heat preservation mechanism includes a protective shell that is fixedly covered on the outside of the bottom shell, and a temperature control tube is spirally wound between the protective shell and the bottom shell.

[0013] As a preferred embodiment of the present invention, each of the anchor blades is uniformly and equidistantly fixedly connected to a rack on one side near the bottom shell, the racks corresponding to the notches of the protruding ridges, and each rack is fixedly connected to a lever plate that fits the insertion groove.

[0014] As a preferred embodiment of the present invention, each of the anchor blades is provided with a scraper mechanism at equal intervals. The scraper mechanism includes a flexible block that penetrates and is fixed to the anchor blade, and scraper heads that extend out of the anchor blade are fixedly connected to both ends of the flexible block.

[0015] As a preferred embodiment of the present invention, the frame mechanism includes a support plate for fixing a container, and support rods are fixedly connected to the lower surface corners of the support plate, and the lower ends of the support rods are jointly fixed to a frame-shaped bottom frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) An organic stirring device for improving the uniformity of organic pigments, wherein a crossbar is rigidly connected to the main shaft through a bushing, and the end of the crossbar abuts against the container to form four-point radial support, thereby increasing the rigidity of the central stirring mechanism. When rotating at high speed, the radial runout of the main shaft is reduced, reducing sawtooth wear caused by vibration and extending service life.

[0017] (2) An organic stirring device for improving the uniformity of organic pigments, wherein the crossbar extends radially to the container and forms a radial flow when rotating, which pushes the organic pigments retained above the dispersion plate to flow towards the container. Combined with the axial flow of the feed hole, the area of ​​the retention zone above the dispersion plate is reduced. The additional radial flow velocity generated by the rotation of the crossbar and the shear flow of the dispersion plate form a composite flow field, which promotes the pre-dispersion of pigment particles before shearing and improves the uniformity of agglomerates entering the shear zone.

[0018] (3) An organic stirring device for improving the uniformity of organic pigments, in conjunction with a flow guiding stirring mechanism, pushes the organic pigments falling along the container radially inward through the crossbar, moves downward through the feed hole, forming a movement path of organic pigments moving downward on the outside, then being pushed inward laterally, and then moving downward in the middle, thereby extending the circulation cycle of organic pigments, expanding the movement range of organic pigments, and avoiding the accumulation of low-flow pigments. The flow guiding stirring mechanism and the middle stirring mechanism work together to enhance the flow circulation of organic pigments.

[0019] (4) An organic stirring device for improving the uniformity of organic pigments, wherein the large radius of the crossbar pushes the flow and the small radius of the dispersing plate forms a combination. The crossbar conveys the organic pigments at the edge to the feed hole in the center, reducing the suction resistance of the dispersing plate and increasing the amount of organic pigments flowing through the shearing zone per unit time. At the same time, the rigid support of the crossbar reduces the energy consumption of the main shaft drive compared to the design without this design, offsetting the power loss caused by the expansion of the stirring radius and improving the balance of energy consumption.

[0020] (5) An organic stirring device for improving the uniformity of organic pigments, wherein annular grooves are respectively set at one-third of the radius of curvature of the bottom of the bottom shell, and the cross-section of the annular grooves is teardrop-shaped. When organic pigments flow through the grooves, they are guided into the grooves and form teardrop-shaped flow channels, thereby increasing the flow velocity and reducing dead angles in the flow, thus helping to enhance the stability of the eddy current.

[0021] (6) An organic stirring device for improving the uniformity of organic pigments, wherein when the anchor blade rotates, the scraper mechanism moves in a circular motion along the bottom curved surface of the bottom shell, and its sharp corner structure generates a continuous shearing force on the deposited particles, which can directly peel off the agglomerates. The scraper mechanism, in conjunction with the anchor blade, can peel off the agglomerates at the bottom, while avoiding particle breakage caused by crushing, thereby improving the peeling efficiency.

[0022] (7) An organic stirring device for improving the uniformity of organic pigments, which increases the speed at which organic pigments rise spirally along the convex ridge, can guide the organic pigments to form a continuous spiral upward flow field along the arc surface of the bottom shell, avoids the formation of stagnant areas with flow rates close to zero at the corners, avoids long-term accumulation of organic pigments, pushes the organic pigments upward and combines the radial shear of the central stirring mechanism, can form a composite flow field of vortex and shear at the bottom, continuously optimizes the stirring process of organic pigments, generates a continuous peeling force on the deposited agglomerates, and improves the agglomerate removal rate.

[0023] (8) An organic stirring device for improving the uniformity of organic pigments, wherein a toothed rack is provided at the edge of the anchor blade. When the anchor blade rotates, the toothed rack generates micro-scale vortices, which form a synergistic disturbance with the main vortex in the groove, thereby improving the uniformity of the radial velocity distribution at the bottom.

[0024] (9) An organic stirring device for improving the uniformity of organic pigments, which can prevent residual particles in the groove from causing secondary pollution in subsequent batches for organic pigments that are prone to agglomeration, control the color difference fluctuation between batches within a reasonable range, thoroughly remove the residue in the groove, avoid cross-contamination, and improve batch stability.

[0025] (10) An organic stirring device for improving the uniformity of organic pigments, wherein after the stirring plate forcibly pulls out the pigment in the groove, it can be immediately captured by the annular vortex and carried into the spiral rising flow field, eliminating the problem of excessive local concentration caused by residual particles in the groove, further reducing the standard deviation of pigment particle size distribution, enhancing the flow field carrying efficiency, and improving uniformity.

[0026] (11) An organic stirring device for improving the uniformity of organic pigments, wherein the rotating plate can loosen the stubborn deposits in the groove, and combined with the dead-angle-free characteristics of the hemispherical bottom arc surface of the bottom shell, the cleaning liquid can flow seamlessly along the curved surface and groove of the bottom shell during subsequent rotary spray cleaning, thereby shortening the cleaning time, reducing the amount of cleaning agent used, cleaning without blind spots, and reducing maintenance costs.

[0027] (12) An organic stirring device for improving the uniformity of organic pigments, in which the particles stripped by the scraper mechanism immediately enter the flow field of the groove, the centrifugal force generated by the eddy in the groove gathers the particles toward the center, and then is pushed upward by the convex ridge and the anchor blade, avoiding secondary deposition of particles at the bottom. This process forms a closed loop of stripping, conveying and dispersing, shortening the time from stripping to entering the main stirring zone and improving the circulation speed of organic pigments.

[0028] (13) An organic stirring device for improving the uniformity of organic pigments, wherein an annular perforation mechanism is provided at the connection between the bottom shell and the container, and the perforation tube is inclined upward. When the spirally rising organic pigments flow through this point, some of the organic pigments form a jet through the perforation tube. The direction of the jet forms an angle with the direction of the mainstream, generating turbulent disturbance in the transition zone, eliminating the flow field separation phenomenon that may be caused by the sudden change in curvature at the connection between the bottom shell and the container, and improving the continuity of the spiral flow field.

[0029] (14) An organic stirring device for improving the uniformity of organic pigments, wherein the radial thrust generated by the rotation of the ribbon paddle causes the surface organic pigments to fall along the cylinder wall of the container to the middle stirring mechanism in the middle layer, forming convection with the organic pigments pushed by the bottom anchor mechanism, and each batch of organic pigments undergoes at least 3 shear cycles of the middle stirring mechanism. This multi-stage cycle reduces the standard deviation of particle size distribution, improves uniformity compared to a single rotating ribbon paddle, and further synergistically improves dispersion uniformity. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the container mechanism of the present invention; Figure 3 This is a schematic diagram of the stirring assembly of the present invention; Figure 4 This is a schematic diagram of the flow guiding and stirring mechanism of the present invention; Figure 5 This is a top view schematic diagram of the flow guiding and stirring mechanism of the present invention; Figure 6 This is a schematic diagram of the stirring mechanism in the middle of the present invention; Figure 7 This is a schematic diagram of the sawtooth plane of the present invention; Figure 8 This is a schematic diagram of the perforation mechanism of the present invention; Figure 9 This is a schematic diagram of the bottom assembly of the present invention; Figure 10 This is a schematic diagram of the bottom mechanism of the present invention; Figure 11 This is a schematic cross-sectional view of the bottom mechanism of the present invention; Figure 12 This is a schematic diagram of the heat preservation mechanism of the present invention; Figure 13 This is a schematic diagram of the bottom anchor mechanism of the present invention; Figure 14 This is a schematic diagram of the scraper mechanism of the present invention; Figure 15 This is a schematic diagram of the internal structure of the present invention.

[0031] In the diagram: 1. Container mechanism; 101. Container; 102. Container cover; 103. Inlet; 104. Motor; 105. Main shaft; 2. Flow guiding and stirring mechanism; 201. Main sleeve; 202. Rotating shaft; 203. Ribbon paddle; 3. Central stirring mechanism; 301. Dispersion disc; 302. Feed hole; 303. Shaft sleeve; 304. Crossbar; 305. Serrated edge; 4. Perforation mechanism; 401. Perforated tube; 402. Tube rod; 5. Bottom mechanism 501. Bottom shell; 502. Groove; 503. Raised ridge; 504. Feed port; 6. Insulation mechanism; 601. Protective shell; 602. Temperature control tube; 7. Bottom anchor mechanism; 701. Column; 702. Anchor blade; 703. Ultrasonic vibrator; 704. Rack; 705. Pulley; 8. Scraper mechanism; 801. Scraper head; 802. Flexible block; 9. Frame mechanism; 901. Support plate; 902. Support rod; 903. Bottom frame. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 11 , Figure 13 , Figure 15 An organic stirring device for improving the uniformity of organic pigments includes a container mechanism 1, which includes a container 101. A cover 102 is fastened to the upper port of the container 101. A motor 104 is fixedly connected to the middle of the upper surface of the cover 102. The output end of the motor 104 passes through the cover 102 and is fixedly connected to a main shaft 105. A stirring assembly is installed inside container 101; A bottom assembly is provided below the container mechanism 1; A frame mechanism 9 is provided on the outside of the container mechanism 1; The bottom assembly includes a bottom mechanism 5, which includes a hemispherical bottom shell 501. The upper end of the bottom shell 501 is fixedly connected to the container 101, and the lower end of the bottom shell 501 is fixedly connected to a discharge port 504 for discharging materials. The inner wall of the bottom shell 501 is provided with annular grooves 502 at three equal divisions. The cross-section of the grooves 502 is teardrop-shaped. The inner wall of the bottom shell 501 is fixedly connected with annularly arranged protrusions 503 at equal intervals. The cross-section of the protrusions 503 is trapezoidal, and the part of the protrusions 503 corresponding to the grooves 502 has a notch. The bottom mechanism 5 is equipped with a bottom anchor mechanism 7 for stirring. The bottom anchor mechanism 7 includes a column 701 that is fixedly connected to the main shaft 105. Anchor blades 702 that are close to the inner wall of the bottom shell 501 are fixedly connected at equal intervals at the lower end of the column 701. The anchor blades 702 are inclined and coiled upwards. An ultrasonic vibrator 703 is fixedly connected to the end of each anchor blade 702.

[0034] Please see Figure 2 An inlet 103 is provided through one side of the surface of the cover 102.

[0035] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 12 The mixing assembly includes, from top to bottom, a flow guiding mixing mechanism 2, a middle mixing mechanism 3, and a perforation mechanism 4; The flow guiding and stirring mechanism 2 includes two main sleeves 201 that are fixedly sleeved on the main shaft 105. The two main sleeves 201 are fitted together. Each main sleeve 201 has a rotating shaft 202 that is equidistantly and evenly connected to the outer side of the main sleeve 201 through a bearing. The outer end of the rotating shaft 202 is fixedly connected to a spiral ribbon propeller 203, which gradually extends from the root to the end. The upper and lower main sleeves 201 have staggered ribbon propellers 203.

[0036] The central stirring mechanism 3 includes two vertically symmetrical dispersion discs 301, with one side of each dispersion disc 301 facing away from the other forming a cone. Each dispersing disc 301 has a feed hole 302 through the center of its surface. A bushing 303 that is fixedly connected to the main shaft 105 is centrally located in the feed hole 302. A crossbar 304 that passes through the dispersing disc 301 is fixedly connected to the outer side of the bushing 303 at equal intervals. The outer end of the crossbar 304 is attached to the container 101. Two dispersion discs 301 are fixedly connected with serrations 305 at equal intervals on their adjacent sides. The ends of the serrations 305 on the upper and lower dispersion discs 301 are tilted in different directions, and the number of serrations 305 on the lower dispersion disc 301 is greater than the number of serrations 305 on the upper dispersion disc 301.

[0037] The perforation mechanism 4 includes a ring of perforated cylinders 401. The upper end of the perforated cylinder 401 is recessed and inclined toward the axis of the container 101. A cylinder rod 402 is fixedly connected to the outer side of the middle part of the perforated cylinder 401. The outer end of the cylinder rod 402 is fixedly connected to the container 101.

[0038] A heat preservation mechanism 6 for temperature control is provided on the outside of the bottom mechanism 5. The heat preservation mechanism 6 includes a protective shell 601 fixedly covered on the outside of the bottom shell 501. A temperature control tube 602 is spirally wound between the protective shell 601 and the bottom shell 501. The temperature control tube 602 gradually becomes sparse from the bottom to the top.

[0039] Please see Figure 13 Each anchor blade 702 has a rack 704 fixedly connected at equal intervals on one side near the bottom shell 501. The rack 704 corresponds to the notch of the protrusion 503. Each rack 704 has a lever 705 that is adapted to the insertion groove 502 fixedly connected.

[0040] Please see Figure 13 , Figure 14 Each anchor blade 702 is provided with a scraper mechanism 8 at equal intervals. The scraper mechanism 8 includes a flexible block 802 that passes through and is fixed to the anchor blade 702. The flexible block 802 is made of silicone material, and scraper heads 801 that extend out of the anchor blade 702 are fixedly connected to both ends of the flexible block 802.

[0041] Please see Figure 1 The frame mechanism 9 includes a support plate 901 that is fixedly connected to the container 101. Support rods 902 are fixedly connected to the lower surface corners of the support plate 901. The lower ends of the support rods 902 are fixedly connected to a frame-shaped bottom frame 903.

[0042] The working principle of this invention is as follows: A stirring assembly is installed inside the container 101. The flow guiding and stirring mechanism 2 of the stirring assembly is located at the top of the container 101. The flow guiding and stirring mechanism 2 at the top adopts a ribbon paddle 203. The ribbon paddle 203 gradually expands from the root to the end. The ribbon paddle 203 is connected to the main sleeve 201 through the rotating shaft 202. The main shaft 105 drives the ribbon paddle 203 to revolve through the main sleeve 201. At the same time, the ribbon paddle 203 rotates around the rotating shaft 202, thereby stirring the organic pigments. The gradual expansion design from the root to the end of the ribbon paddle 203, combined with the revolution, forms a large-scale axial pushing force that can cover the upper area of ​​the container 101. At the same time, the rotation of the ribbon paddle 203 around the rotating shaft 202 generates radial centrifugal force, causing the organic pigments to move along the surface of the ribbon paddle 203 towards the end, and finally move downward on the inner wall of the container 101.

[0043] The diameter of the dispersing disc 301 is smaller than the diameter of the container 101. The surface of the dispersing disc 301 is electrolytically polished to reduce the adhesion of organic pigments. The dispersing disc 301 consists of two layers with a gap between them, and is rigidly connected to the main shaft 105 through a bushing 303. Sawtooth 305s are evenly and equidistantly fixed to the sides of the two dispersing discs 301 that are close to each other. The lower layer of sawtooth 305s has more teeth than the upper layer, and the inclination directions of the upper and lower layers of sawtooth 305s are opposite, forming a double-layered staggered cross-shear structure when the central stirring mechanism 3 rotates. The ends of the sawtooth 305s are rounded to avoid fatigue fracture caused by stress concentration. A feed hole 302 is opened in the center of the dispersing disc 301, and a bushing 303 is installed inside the feed hole 302. Four crossbars 304 are fixedly connected to the outer wall of the bushing 303 along its four circumferences. The crossbars 304 contact the container 101, and the central bushing 303 and the radial crossbars 304 form a radial support structure.

[0044] The crossbar 304 is rigidly connected to the main shaft 105 via the bushing 303. At the same time, the end of the crossbar 304 abuts against the container 101 to form four-point radial support, thereby increasing the rigidity of the central stirring mechanism 3. During high-speed rotation, the radial runout of the main shaft 105 is reduced, which reduces the wear of the saw teeth 305 caused by vibration and extends its service life.

[0045] The crossbar 304 extends radially to the container 101. When it rotates, it forms a radial flow, which pushes the organic pigments retained above the dispersion disk 301 toward the container 101. Combined with the axial flow of the feed hole 302, it reduces the area of ​​the retention zone above the dispersion disk 301. The additional radial flow velocity generated by the rotation of the crossbar 304 and the shear flow of the dispersion disk 301 form a composite flow field, which promotes the pre-dispersion of pigment particles before shearing and improves the uniformity of agglomerates entering the shear zone.

[0046] In conjunction with the flow guiding and stirring mechanism 2, the organic pigment falling along the container 101 is radially pushed inward by the crossbar 304 and moves downward through the feed hole 302, forming a movement path of organic pigment moving downward on the outside, then being pushed inward laterally, and then moving downward in the middle. This extends the circulation cycle of organic pigment, expands the movement range of organic pigment, and avoids the accumulation of low-flow pigment. The flow guiding and stirring mechanism 2 and the middle stirring mechanism 3 work together to enhance the flow circulation of organic pigment.

[0047] The large-radius push of the crossbar 304 and the small-radius shear of the dispersing disk 301 work together to transport the organic pigments from the edge to the feed hole 302 in the center, reducing the suction resistance of the dispersing disk 301 and increasing the amount of organic pigments flowing through the shearing zone per unit time. At the same time, the rigid support of the crossbar 304 reduces the drive energy consumption of the main shaft 105 compared to not having this design, offsetting the power loss caused by the expansion of the stirring radius and improving the balance of energy consumption.

[0048] The hemispherical surface of the bottom shell 501 has no right-angle transition. For low-flow pigments, the hemispherical curvature of the bottom shell 501 can help organic pigments to gather towards the center through gravity, reducing the amount of pigments adhering to the sidewalls of the bottom shell 501. At the same time, gravity can be used to assist in discharging, reducing the amount of residual organic pigments.

[0049] Annular grooves 502 are provided at one-third of the radius of curvature at the bottom of the bottom shell 501. The cross-section of the annular grooves 502 is teardrop-shaped. When organic pigments flow through the grooves 502, they are guided into the grooves 502 to form teardrop-shaped flow channels, which increases the flow velocity and helps to enhance the stability of the eddy current by reducing dead flow angles.

[0050] An insulation mechanism 6 is installed on the outside of the bottom mechanism 5, and the temperature control tubes 602 are distributed with denser distribution in the center and sparser distribution at the edges. The flow rate of heat transfer oil inside the temperature control tubes 602 is precisely adjusted by the temperature control system to minimize the temperature distribution deviation at the bottom, avoid oxidation of organic pigments due to local overheating, and improve heating uniformity.

[0051] The arc-shaped bottom of the bottom shell 501 makes the linear velocity distribution of the anchor blade 702 of the bottom anchor mechanism 7 more balanced and evenly distributes the shear force.

[0052] The anchor blade 702 adopts an arc-shaped biomimetic design, fitting snugly against the hemispherical bottom of the base shell 501. Wear-resistant alloy scraper mechanisms 8 are evenly spaced and interspersed on the anchor blade 702. The scraper mechanisms 8 have sharp ends and maintain a gap with the bottom arc surface of the base shell 501. When the anchor blade 702 rotates, the scraper mechanisms 8 move in a circular motion along the bottom curved surface of the base shell 501. Their sharp ends generate a continuous shearing force on the deposited particles, directly peeling off agglomerates. The scraper mechanisms 8, in conjunction with the anchor blade 702, can peel off agglomerates at the bottom while avoiding particle breakage caused by crushing, thus improving peeling efficiency.

[0053] Along the generatrix of the hemispherical bottom of the bottom shell 501, three equidistant convex ribs 503 are provided from the bottom center of the bottom shell 501 to the transition point of the container 101. The cross-section of the convex ribs 503 is trapezoidal. When the organic pigment is pushed towards the edge by the anchor blades 702, the convex ribs 503 can convert the radial flow into axial upward force (climbing along the inclined surface of the convex ribs 503), forming a basic spiral flow tendency. The bottom anchor blade 702 adopts an inclined torsion design. When the anchor blade 702 rotates, it generates an upward axial thrust. Combined with the torsion angle, it forms a spiral propulsion trajectory, which, together with the convex rib 503, forms a thrust guide. This increases the speed at which the organic pigment spirals upward along the convex rib 503, and guides the organic pigment to form a continuous spiral upward flow field along the arc surface of the bottom shell 501. This avoids the formation of stagnant areas with near-zero flow velocity at the corners, thus preventing long-term accumulation of organic pigment. The upward push of the organic pigment, combined with the radial shear of the central stirring mechanism 3, can form a composite flow field of vortex and shear at the bottom, continuously optimizing the stirring process of the organic pigment, generating a continuous peeling force on the deposited agglomerates, and improving the agglomerate removal rate.

[0054] A rack 704 is provided at the edge of the anchor blade 702. When the anchor blade 702 rotates, the rack 704 generates micro-scale vortices, which form a synergistic disturbance with the main vortex in the groove 502, thereby improving the uniformity of the radial velocity distribution at the bottom. At the same time, the height of the anchor blade 702 is adjusted to be above the groove 502, so that the organic pigment has pre-rotated before entering the groove 502, which can shorten the vortex establishment time.

[0055] A lever 705 is connected to the part of the rack 704 corresponding to the groove 502, which is adapted to the groove 502. The lever 705 is precisely adapted to the contour of the groove 502. When the anchor blade 702 rotates, it can penetrate into the groove 502 to scrape off the attached pigment particles, reducing the amount of residue in the groove 502. For organic pigments that are prone to agglomeration, it can prevent the residual particles in the groove 502 from causing secondary pollution in subsequent batches, control the color difference fluctuation between batches within a reasonable range, thoroughly remove the residue in the groove 502, avoid cross-contamination, and improve batch stability.

[0056] After the deflector 705 forcibly removes the pigment from the groove 502, it can be immediately captured by the annular vortex and carried into the spiral upward flow field, eliminating the problem of excessively high local concentration caused by the accumulation of residual particles in the groove 502, further reducing the standard deviation of pigment particle size distribution, enhancing the flow field carrying efficiency, and improving uniformity.

[0057] When the lever 705 rotates, it can loosen the stubborn deposits in the groove 502. Combined with the hemispherical bottom arc surface of the bottom shell 501, which has no dead angles, the cleaning fluid can flow seamlessly along the curved surface of the bottom shell 501 and the groove 502 during subsequent rotary spray cleaning. This shortens the cleaning time, reduces the amount of cleaning agent used, ensures cleaning without blind spots, and reduces maintenance costs.

[0058] The particles stripped by the scraper mechanism 8 immediately enter the flow field of the groove 502. The centrifugal force generated by the eddy current in the groove 502 gathers the particles towards the center. They are then pushed upward by the convex rib 503 and the anchor blade 702, preventing the particles from being deposited again at the bottom. This process forms a closed loop of stripping, conveying and dispersing, shortening the time from stripping to entering the main stirring zone and increasing the circulation speed of organic pigments.

[0059] The scraper mechanism 8 is made of wear-resistant alloy, and the edges are treated with high-frequency quenching to improve the surface hardness. Even if it is in contact with high-hardness pigment particles for a long time, the annual wear is reduced.

[0060] A flexible block 802 is embedded in the middle of the scraper mechanism 8, forming a tough connection with the anchor blade 702. The elastic deformation characteristics of the flexible block 802 can compensate for the slight deformation of the hemispherical bottom of the bottom shell 501 caused by errors or long-term use, so that the gap between the scraper mechanism 8 and the bottom shell 501 is always stable within the design range. Even when the anchor blade 702 rotates and causes radial runout, the buffering effect of the flexible block 802 can still maintain the continuous shearing of the scraper head 801 on the deposited particles. The scraper mechanism 8 adaptively enhances the peeling efficiency.

[0061] An ultrasonic vibrator 703 is integrated at the end of the anchor blade 702. It helps to disperse stubborn agglomerates through high-frequency vibration. When used with the ultrasonic vibrator 703, the hemispherical structure of the bottom shell 501 can reflect sound waves to form a standing wave field, so that the agglomerates are subjected to multidimensional shear forces, thereby improving the breaking efficiency.

[0062] An annular perforation mechanism 4 is provided at the connection between the bottom shell 501 and the container 101, with the perforation tube 401 tilted upwards. When the spirally rising organic pigment flows through this point, some of the organic pigment forms a jet through the perforation tube 401. The direction of the jet intersects the direction of the mainstream, generating turbulent disturbance in the transition zone. This eliminates the flow field separation phenomenon that may be caused by the abrupt change in curvature at the connection between the bottom shell 501 and the container 101, and improves the continuity of the spiral flow field.

[0063] The radial thrust generated by the rotation of the ribbon propeller 203 causes the surface organic pigment to fall along the cylinder wall of container 101 to the central stirring mechanism 3 in the middle layer, where it forms convection with the organic pigment pushed by the bottom anchor mechanism 7. Each batch of organic pigment undergoes at least three shear cycles in the central stirring mechanism 3. This multi-stage circulation reduces the standard deviation of particle size distribution, improves uniformity compared to the single-rotation ribbon propeller 203, and further synergistically enhances the dispersion uniformity.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An organic stirring device for improving the uniformity of organic pigments, comprising a container mechanism (1), the container mechanism (1) comprising a container (101), a lid (102) being fastened to the upper port of the container (101), a motor (104) being fixedly connected to the middle of the upper surface of the lid (102), and the output end of the motor (104) passing through the lid (102) and fixedly connected to a main shaft (105). The container (101) is equipped with a stirring assembly; A bottom assembly is provided below the container mechanism (1); A frame mechanism (9) is provided on the outside of the container mechanism (1). Its features are: The bottom assembly includes a bottom mechanism (5), which includes a hemispherical bottom shell (501). The upper end of the bottom shell (501) is fixedly connected to a container (101), and the lower end of the bottom shell (501) is fixedly connected to a discharge port (504) for discharging materials. The inner wall of the bottom shell (501) is provided with annular grooves (502) at three equal divisions. The cross-section of the grooves (502) is teardrop-shaped. The inner wall of the bottom shell (501) is fixedly connected with annularly arranged protrusions (503) at equal intervals. The cross-section of the protrusions (503) is trapezoidal, and the part of the protrusions (503) corresponding to the grooves (502) has a notch. The bottom mechanism (5) is provided with a bottom anchor mechanism (7) for stirring. The bottom anchor mechanism (7) includes a column (701) fixedly connected to the main shaft (105). The lower end of the column (701) is fixedly connected with anchor blades (702) close to the inner wall of the bottom shell (501). The anchor blades (702) are inclined and coiled upwards. Each anchor blade (702) is fixedly connected to an ultrasonic vibrator (703) at its end.

2. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: An inlet (103) is provided through one side of the surface of the lid (102).

3. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: The stirring assembly includes, from top to bottom, a flow guiding stirring mechanism (2), a middle stirring mechanism (3), and a perforation mechanism (4). The flow guiding and stirring mechanism (2) includes two main sleeves (201) that are fixedly sleeved on the main shaft (105). The two main sleeves (201) are fitted together vertically. Each main sleeve (201) has a rotating shaft (202) movably connected to its outer side by bearings at equal intervals. The outer end of the rotating shaft (202) is fixedly connected to a spiral ribbon propeller (203). The ribbon propeller (203) gradually extends from the root to the end. The ribbon propellers (203) of the upper and lower main sleeves (201) are staggered.

4. The stirring device for improving the uniformity of organic pigments according to claim 3, characterized in that: The central stirring mechanism (3) includes two vertically symmetrical dispersion discs (301), with the opposite sides of the two dispersion discs (301) forming a conical surface. Each of the dispersion discs (301) has a feed hole (302) through the center of its surface. A bushing (303) for fixing the main shaft (105) is centrally located in the feed hole (302). A crossbar (304) through the dispersion disc (301) is fixedly connected to the outer side of the bushing (303) at equal intervals. The outer end of the crossbar (304) is attached to the container (101). Two dispersion discs (301) are fixedly connected with serrations (305) at equal intervals on their adjacent sides, and the ends of the serrations (305) of the upper and lower dispersion discs (301) are deflected in different directions.

5. The stirring device for improving the uniformity of organic pigments according to claim 4, characterized in that: The perforation mechanism (4) includes a ring-shaped perforated cylinder (401), the upper end of the perforated cylinder (401) is recessed and inclined toward the axis of the container (101), and a cylinder rod (402) is fixedly connected to the outer side of the middle part of the perforated cylinder (401), and the outer end of the cylinder rod (402) is fixedly connected to the container (101).

6. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: The bottom mechanism (5) is provided with a heat preservation mechanism (6) for temperature control on the outside. The heat preservation mechanism (6) includes a protective shell (601) fixedly covered on the outside of the bottom shell (501). A temperature control tube (602) is spirally wound between the protective shell (601) and the bottom shell (501).

7. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: Each of the anchor blades (702) has a rack (704) fixedly connected at equal intervals on one side near the bottom shell (501). The rack (704) corresponds to the notch of the protrusion (503). Each rack (704) has a lever (705) fixedly connected to it to fit the insertion groove (502).

8. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: Each of the anchor blades (702) is provided with a scraper mechanism (8) at equal intervals. The scraper mechanism (8) includes a flexible block (802) that penetrates and is fixed to the anchor blade (702). Both ends of the flexible block (802) are respectively fixedly connected to scraper heads (801) that extend out of the anchor blade (702).

9. The stirring device for improving the uniformity of organic pigments according to claim 1, characterized in that: The frame mechanism (9) includes a support plate (901) for fixing the sleeve container (101), and support rods (902) are fixedly connected to the lower surface corners of the support plate (901), and the lower ends of the support rods (902) are fixedly connected to a frame-shaped bottom frame (903).

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