A stirring discharging device and a sand mill

Abstract

The utility model discloses a stirring and discharging device and a sand mill with the stirring and discharging device, wherein the stirring and discharging device comprises a machine base; a rotating assembly, which is rotatably mounted on the machine base, and the rotating assembly comprises a rotating shaft, a first dispersing wheel and a second dispersing wheel, the rotating shaft connects and drives the first dispersing wheel and the second dispersing wheel to rotate together, the first dispersing wheel is used to disperse the solid matter in the slurry, and the second dispersing wheel is used to disperse the liquid matter in the slurry; a screen, which is fixedly mounted on the machine base, the screen is arranged between the first dispersing wheel and the second dispersing wheel, the screen is suitable for allowing the liquid matter to pass through, and a discharging cavity is formed between the second dispersing wheel and the screen, and the slurry passes through the first dispersing wheel, the screen and the second dispersing wheel in sequence. The discharging efficiency can be improved, the grinding effect can be optimized, and the system stability can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mills, in particular to a stirring and discharging device and a sand mill. Background Art

[0002] Horizontal sand mill is a high-efficiency wet ultrafine grinding and dispersing machine widely used in non-metallic mineral industries such as coatings, dyes, paints, inks, medicines, magnetic powders, ferrites, photographic films, pesticides, papermaking, and cosmetics. It uses a material pump to input the solid-liquid mixed slurry that has been pre-dispersed and wetted by the mixer into the cylinder. The slurry and the grinding media in the cylinder are stirred by the high-speed rotating disperser, so that the solid particles in the slurry and the grinding media produce stronger collision, friction, and shearing effects with each other, so as to accelerate the grinding of particles and disperse aggregates. The slurry after grinding and dispersion is separated from the grinding media by a dynamic separator and flows out from the discharge pipe.

[0003] The current horizontal sand mill design requires the installation of a screen to prevent the grinding beads (zirconium beads) from being discharged with the slurry. The current design is to set the screen at the end of the main shaft (i.e., the static screen discharge of the rear end cover). When the slurry passes through the screen, once it condenses into blocks, it will quickly block the screen holes, seriously hindering the smooth discharge of the material, resulting in a significant decrease in the discharge speed. At the same time, the internal pressure increase caused by the blockage directly acts on the sealing components of the equipment, which not only aggravates the wear of the seals, but also greatly reduces the overall service life of the sand mill, which has an adverse impact on the stable operation and maintenance costs of the equipment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a stirring and discharging device, which can improve the discharging efficiency, optimize the grinding effect, and enhance the system stability.

[0005] The utility model also provides a sand mill with the above stirring and discharging device.

[0006] According to the first aspect of the present utility model, a stirring and discharging device includes: a machine base;

[0007] A rotating assembly is rotatably mounted on the machine base, the rotating assembly comprises a rotating shaft, a first dispersing wheel and a second dispersing wheel, the rotating shaft connects and drives the first dispersing wheel and the second dispersing wheel to rotate together, the first dispersing wheel is used to disperse the solid matter in the slurry, and the second dispersing wheel is used to disperse the liquid matter in the slurry;

[0008] A screen is fixedly mounted on the machine base, the screen is arranged between the first dispersing wheel and the second dispersing wheel, the screen is suitable for allowing liquid to pass through, a discharge cavity is formed between the second dispersing wheel and the screen, and the slurry passes through the first dispersing wheel, the screen and the second dispersing wheel in sequence.

[0009] A stirring and discharging device according to an embodiment of the utility model has at least the following beneficial effects: the rotating component can process the solid and liquid components in the slurry at the same time, the first dispersing wheel and the second dispersing wheel work together, the first dispersing wheel can break up the grinding beads in the slurry to prevent the grinding beads from clogging the screen, and the second dispersing wheel can break up the slurry in the screen to prevent the slurry in the screen from agglomerating and clogging the discharge port, thereby improving the discharge efficiency; the screen is arranged between the first dispersing wheel and the second dispersing wheel, which can separate slurries of different particle sizes and prevent the grinding beads from entering the discharge port, thereby ensuring the continuity and stability of the processing process; the slurry needs to be processed step by step by the first dispersing wheel, the screen, and the second dispersing wheel, which can ensure that the slurry is refined, improve the processing efficiency, and ensure the quality of the final product; the discharge port is arranged in the machine base, which can prevent the pressure in the machine base from being too high and causing damage to the machine base, and can also enhance the stability of the rotating shaft and reduce the load on the rotating shaft.

[0010] According to some embodiments of the utility model, the rotating shaft is provided with a positioning groove, and the first dispersing wheel and the second dispersing wheel are installed on the rotating shaft through the positioning groove. The positioning groove can ensure the positioning of the rotating assembly, avoid position deviation during assembly, and achieve efficient disassembly and assembly when disassembling the rotating assembly, thereby simplifying the maintenance process and reducing maintenance costs.

[0011] According to some embodiments of the utility model, the first dispersing wheel is a hollow cylindrical structure with one end open, and the side wall and the bottom of the first dispersing wheel are provided with a plurality of through holes, and the through holes form a circulation channel for the slurry. Providing a plurality of through holes can speed up the flow of the slurry, and can also speed up the dispersion of the grinding beads and avoid the accumulation of the grinding beads.

[0012] According to some embodiments of the utility model, the diameter of the second dispersing wheel is smaller than that of the first dispersing wheel, and the second dispersing wheel comprises a plurality of blade blocks, which are arranged at intervals along the circumferential direction on the second dispersing wheel, so as to generate a more concentrated shear force, improve the uniformity and fineness of the slurry, and significantly improve the efficiency of discharging.

[0013] According to some embodiments of the utility model, two sets of second dispersion wheels are arranged on the rotating shaft. Providing two sets of dispersion wheels can avoid balancing the torque of the rotating shaft and further prevent the slurry from agglomerating in the discharge chamber.

[0014] According to some embodiments of the utility model, two sets of second dispersion wheels are arranged on the rotating shaft, and the projections of the blades of the two sets of second dispersion wheels in the direction of the machine base are staggered. The two sets of second dispersion wheels can form staggered shearing areas, greatly improving the material shearing effect.

[0015] According to some embodiments of the utility model, the second dispersion wheel is provided with four blade blocks. Providing the second dispersion wheel can reduce the wear of a single blade head and reduce the cost of equipment maintenance.

[0016] According to some embodiments of the utility model, the rotating assembly further comprises a plurality of grinding discs, the grinding discs are installed on the rotating shaft in a transmission connection, and a spacer is arranged between two adjacent grinding discs. The spacer can reduce the friction between adjacent grinding discs, reduce unnecessary energy loss, and make the grinding process more efficient and energy-saving.

[0017] According to some embodiments of the utility model, the screen is fixedly connected to the base via a flange. The screen is fixed to the base via a flange, and such a structural design ensures the stability and durability of the screen, reduces the risk of displacement or damage caused by vibration or long-term operation, thereby extending the service life of the equipment and reducing maintenance costs.

[0018] The sand mill according to the second embodiment of the utility model comprises any one of the stirring and discharging devices described above.

[0019] The sand mill according to the embodiment of the utility model has at least the following beneficial effects: the sand mill using the embodiment of the first aspect can effectively break up the slurry agglomerated during the grinding process, avoid the accumulation of slurry in the machine base, significantly reduce the blockage phenomenon, thereby speeding up the discharge speed and improving the overall discharge efficiency.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A cross-sectional view of a stirring and discharging device according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of a first dispersion wheel according to an embodiment of the present utility model.

[0024] Reference numerals: rotating shaft 100 ; first dispersing wheel 110 ; screen 120 ; second dispersing wheel 130 ; grinding disc 140 ; ​​discharge chamber 150 ; through hole 160 . DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figure 1 to Figure 2 , a stirring and discharging device, comprising: a machine base;

[0030] A rotating assembly is rotatably mounted on the machine base, and the rotating assembly includes a rotating shaft 100, a first dispersing wheel 110, and a second dispersing wheel 130. The rotating shaft 100 is connected to and drives the first dispersing wheel 110 and the second dispersing wheel 130 to rotate together. The first dispersing wheel 110 is used to disperse the solid matter in the slurry, and the second dispersing wheel 130 is used to disperse the liquid matter in the slurry.

[0031] The screen 120 is fixedly mounted on the machine base and is disposed between the first dispersing wheel 110 and the second dispersing wheel 130. The screen 120 is suitable for allowing liquid to pass through. A discharge cavity 150 is formed between the second dispersing wheel 130 and the screen 120. The slurry passes through the first dispersing wheel 110, the screen 120 and the second dispersing wheel 130 in sequence.

[0032] It is understandable that the static screen 120 is integrated into the end of the bearing seat at the mechanical seal end to form an internal and external dispersion wheel combination device. The flange structure of the screen 120 is fixed to the end plate of the bearing seat, achieving a stable and efficient installation. The first dispersion wheel 110 is responsible for separating the grinding media (such as zirconium beads), while the second dispersion wheel 130 is used to disperse the slurry. The core of this design is that although the rotation of the rotating shaft 100 drives the first dispersion wheel 110 and the second dispersion wheel 130 to rotate synchronously, the screen 120 itself remains stationary, and a speed difference is formed between the components, so that the slurry can be separated and dispersed. The second dispersion wheel 130 can also form a principle similar to a water pump to disperse and discharge the slurry entering the screen 120, so that the slurry in the screen 120 will not be blocked, thereby greatly improving the discharge efficiency.

[0033] Different from the traditional solution of setting the screen 120 at the end of the rotating shaft 100, this solution sets the screen 120 at the head end of the rotating shaft 100, which effectively balances the weight distribution of the equipment and significantly reduces the vibration that may be generated during high-speed rotation due to the heavy screen 120. It avoids the high vibration problem caused by the previous shaft tail installation and ensures that the equipment can maintain excellent stability and low noise even in high-speed operation.

[0034] The rotating shaft 100 is provided with a positioning groove, and the first dispersing wheel 110 and the second dispersing wheel 130 are installed on the rotating shaft 100 through the positioning groove. The positioning groove can ensure the positioning of the rotating assembly, avoid position deviation during the assembly process, and can also achieve efficient disassembly and assembly when disassembling the rotating assembly, thereby simplifying the maintenance process and reducing maintenance costs.

[0035] Reference Figure 2 The first dispersing wheel 110 is a hollow cylindrical structure with one end open. The sidewall and bottom of the first dispersing wheel 110 are provided with a plurality of through holes 160, and the through holes 160 form a circulation channel for the slurry. The provision of multiple through holes 160 can speed up the flow of the slurry, and can also speed up the dispersion of the grinding beads and avoid the accumulation of the grinding beads. It is understandable that the first dispersing wheel 110 can also be designed into other shapes, as long as it can be installed on the rotating shaft 100 and can break up the grinding beads. The design of the first dispersing wheel 110 in this solution is a more preferred embodiment. By providing multiple through holes 160, the influence of the first dispersing wheel 110 on the material flow can be reduced.

[0036] Reference Figure 1 The diameter of the second dispersing wheel 130 is smaller than that of the first dispersing wheel 110, and the second dispersing wheel 130 includes a plurality of blade blocks, which are arranged at intervals along the circumferential direction on the second dispersing wheel 130. A more concentrated shear force can be generated, the uniformity and fineness of the slurry can be improved, and the efficiency of discharging can be significantly improved.

[0037] Two sets of second dispersion wheels 130 are provided on the rotating shaft 100. The two sets of dispersion wheels can avoid balancing the torque of the rotating shaft 100 and further prevent the slurry from agglomerating in the discharge chamber 150. The two dispersion wheels are provided with four blade blocks. The second dispersion wheel 130 can reduce the wear of a single blade head and reduce the cost of equipment maintenance. The four blade blocks are arranged at a 90° interval in the circumferential direction.

[0038] Two sets of second dispersing wheels 130 are arranged on the rotating shaft 100, and the projections of the cutter heads of the two sets of second dispersing wheels 130 in the direction of the machine base are staggered. The two sets of second dispersing wheels 130 can form staggered shearing areas, which greatly improves the shearing effect of the material. It is understandable that the two sets of cutter heads can be designed into different knife shapes. In some preferred embodiments, one set adopts a straight-edge knife shape and the other set adopts a serrated shape, which can adapt to materials of different properties and improve the flexibility and efficiency of processing.

[0039] The rotating assembly further includes a plurality of grinding discs 140, which are transmission-connected and mounted on the rotating shaft 100, and a spacer is provided between two adjacent grinding discs 140. The spacer can reduce the friction between adjacent grinding discs 140, reduce unnecessary energy loss, and make the grinding process more efficient and energy-saving.

[0040] The screen 120 is fixedly connected to the base through a flange. The screen 120 is fixed to the base through a flange. Such a structural design ensures the stability and durability of the screen 120, reduces the risk of displacement or damage caused by vibration or long-term operation, thereby extending the service life of the equipment and reducing maintenance costs.

[0041] The present embodiment provides a stirring and discharging device for optimizing the slurry grinding process. The device includes a machine base to ensure stable support of the equipment. The rotating assembly is installed on the machine base, with the rotating shaft 100 as the center. The rotating shaft 100 is provided with a positioning groove for installing the first dispersing wheel 110 and the second dispersing wheel 130. The first dispersing wheel 110 is designed as a hollow cylindrical structure with one end open. The first dispersing wheel 110 and the bottom and side walls are respectively provided with through holes 160 to promote the smooth flow of materials. The second dispersing wheel 130 is smaller than the first dispersing wheel 110, and four knife blocks are installed on it. These knife blocks are arranged at 90 degrees in the circumferential direction to achieve effective dispersion of liquid substances.

[0042] When the rotating shaft 100 rotates, the first dispersing wheel 110 and the second dispersing wheel 130 rotate synchronously, the first dispersing wheel 110 can break up the grinding beads, and the second dispersing wheel 130 can break up the slurry that has agglomerated in the screen 120, thereby improving the efficiency of discharging. Since the screen 120 is fixed, the first dispersing wheel 110 and the second dispersing wheel 130 rotate with the rotating shaft 100, and there is a speed difference between the screen 120 and the second dispersing wheel 130, the slurry that has agglomerated in the discharging cavity 150 can be broken up, greatly improving the efficiency of discharging.

[0043] The rotating assembly also includes eight grinding discs 140, which are fixed to the rotating shaft 100 by key connection. Wear-resistant spacers are installed between adjacent grinding discs 140 to reduce wear and promote step-by-step grinding of materials. The screen 120 is fixed to the machine base by flange connection, which can effectively block large particles and ensure the smooth passage of liquid materials. After the slurry is initially crushed by the first dispersing wheel 110, it is filtered through the screen 120 and finally the grinding process is completed under the fine treatment of the second dispersing wheel 130. The whole device shows excellent material handling performance and high efficiency.

[0044] The utility model also proposes a sand mill, including any of the above stirring and discharging devices, which can effectively break up the slurry agglomerated during the grinding process, avoid the accumulation of slurry in the machine base, significantly reduce the blockage phenomenon, thereby accelerating the discharging speed and improving the overall discharging efficiency.

[0045] It is understandable that the feed end of the sand mill is usually subjected to greater pressure, while the pressure at the discharge end is relatively small. In the existing design, the feed end is arranged inside the machine base. This design leads to excessive pressure inside the machine base, which easily affects the life of the bearing end seat in the machine base. The sand mill using the above-mentioned stirring and discharging device sets the discharge end inside the machine base, which effectively alleviates the pressure of the machine base, significantly improves the pressure balance of the sand mill system, and optimizes the stress distribution of various parts inside the machine base, thereby extending the service life of the sand mill.

[0046] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A stirring and discharging device for grinding slurry, characterized in that: include: Machine base; A rotating assembly is rotatably mounted on the machine base, the rotating assembly comprises a rotating shaft, a first dispersing wheel and a second dispersing wheel, the rotating shaft connects and drives the first dispersing wheel and the second dispersing wheel to rotate together, the first dispersing wheel is used to disperse the solid matter in the slurry, and the second dispersing wheel is used to disperse the liquid matter in the slurry; A screen is fixedly mounted on the machine base, the screen is arranged between the first dispersing wheel and the second dispersing wheel, the screen is suitable for allowing liquid to pass through, a discharge cavity is formed between the second dispersing wheel and the screen, and the slurry passes through the first dispersing wheel, the screen and the second dispersing wheel in sequence.

2. A stirring and discharging device according to claim 1, characterized in that: The rotating shaft is provided with a positioning groove, and the first dispersing wheel and the second dispersing wheel are installed on the rotating shaft through the positioning groove.

3. A stirring and discharging device according to claim 1, characterized in that: The first dispersing wheel is a hollow cylindrical structure with an open end. The side wall and the bottom of the first dispersing wheel are provided with a plurality of through holes, and the through holes form a circulation channel for the slurry.

4. A stirring and discharging device according to claim 1, characterized in that: The diameter of the second dispersing wheel is smaller than that of the first dispersing wheel. The second dispersing wheel comprises a plurality of blade blocks, and the plurality of blade blocks are arranged on the second dispersing wheel at intervals along the circumferential direction.

5. A stirring and discharging device according to claim 4, characterized in that: Two groups of second dispersing wheels are arranged on the rotating shaft.

6. A stirring and discharging device according to claim 4, characterized in that: Two groups of second dispersing wheels are arranged on the rotating shaft, and the projections of the cutter heads of the two groups of the second dispersing wheels in the direction of the machine base are staggered.

7. A stirring and discharging device according to claim 6, characterized in that: The binary dispersion wheel is provided with four blade blocks.

8. A stirring and discharging device according to claim 1, characterized in that: The rotating assembly also includes a plurality of grinding discs, which are installed in a transmission connection with the rotating shaft, and a spacer is arranged between two adjacent grinding discs.

9. A stirring and discharging device according to claim 1, characterized in that: The screen is fixedly connected to the machine base via a flange.

10. A sand mill, characterized in that: A stirring and discharging device comprising any one of claims 1 to 9.

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