A device for preventing sticking to the inner wall of the mixing tank of a slurry forming apparatus.

Abstract

This utility model discloses an anti-sticking treatment device for the inner wall of the mixing tank of a slurry forming device, relating to the technical field of mixing tanks. The device includes a mixing tank; a mixing assembly includes a drive motor, which is fixedly connected to the upper end of the mixing tank, and a stirring shaft is fixedly connected to the output end of the drive motor; a turntable is rotatably connected to the upper end of a fixed ring; a gear ring is fixedly connected to the inner wall of the mixing tank; a first gear is fixedly connected to the surface of the stirring shaft; a rotating shaft is rotatably connected inside the turntable; and a second gear is fixedly connected to the surface of the rotating shaft. By setting the first gear, the second gear, and the gear ring in a relatively enclosed space formed by the turntable, fixed ring, and mixing tank, and ensuring that the gear meshing area is far from the direct scouring range of the slurry, the device effectively avoids the problems of fiber entanglement on the gear shaft and particle blockage of the gear side gaps, ensuring long-term stable operation of the transmission system and reducing equipment failure rate.

Description

Technical Field

[0001] This utility model relates to the field of mixing tank technology, and in particular to an anti-sticking treatment device for the inner wall of the mixing tank of a mixing and slurry forming device. Background Technology

[0002] In the pulping process of the papermaking industry, the pulp mixing device is a key piece of equipment for achieving uniform mixing of pulp raw materials and adjusting pulp concentration and properties. Through the rotational motion of the stirring paddle, it fully integrates fibers, water, and various additives, providing pulp with uniform texture and stable performance for subsequent papermaking processes. Chinese utility model patent, authorized publication number "CN222034388U", discloses a pulp mixing device for environmentally friendly cardboard box production, including a shell, a first mixing component, and a second mixing component. The first mixing component includes a first mixing shaft and a first mixing blade; the second mixing component includes a second mixing shaft and transverse spiral mixing blades disposed on the second mixing shaft; the second mixing shaft is also equipped with a first helical gear, and a vertical rod is equipped with longitudinal spiral mixing blades. The bottom end of the vertical rod is equipped with a second helical gear, which meshes with the first helical gear.

[0003] The device described in the aforementioned patent uses a second stirring shaft to drive the horizontal spiral stirring blades on it, thereby stirring the pulp at the bottom of the housing. However, this technical solution still has certain drawbacks. When the device is in use, the vertical rod and the second stirring shaft are located inside the housing, and a helical gear is used for transmission. Since the helical gear is directly exposed inside the housing, the smoothness of the helical gear transmission depends on precise tooth meshing and appropriate tooth flank clearance. Fibers in the pulp can easily become entangled on the gear shaft or tooth surface, and small particles may become embedded in the tooth flank clearance, leading to poor gear meshing. This can cause impacts, vibrations, and noise during transmission, disrupting the smoothness of the transmission and affecting the stirring effect of the agitator. In severe cases, it can easily lead to malfunctions. Therefore, this utility model proposes a novel solution. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a device for preventing sticking to the inner wall of the mixing tank of a mixing and slurry forming device, which can solve the problem of the mixing tank.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing sticking to the inner wall of the mixing tank of a slurry mixing apparatus, comprising a mixing tank; The inner wall of the mixing tank is coated with polytetrafluoroethylene. The mixing assembly is set on the mixing tank and includes a drive motor. The drive motor is fixedly connected to the upper end of the mixing tank, and the output end of the drive motor is fixedly connected to the mixing shaft. A fixing ring is fixedly connected to the inner wall of the mixing tank, and a turntable is rotatably connected to the upper end of the fixing ring. Both the mixing tank and the turntable are rotatably connected to the mixing shaft, and a second mixing blade is fixedly connected to the lower end surface of the mixing shaft. A gear ring is fixedly connected to the inner wall of the mixing tank, a first gear is fixedly connected to the surface of the mixing shaft, a rotating shaft is rotatably connected to the inside of the turntable, and a second gear is fixedly connected to the surface of the rotating shaft. The first gear and the gear ring both mesh with the second gear, and the lower end of the rotating shaft is fixedly connected to the third stirring blade.

[0006] Preferably, the mixing tank is provided with a connecting plate inside, the rotating shaft is rotatably connected to the connecting plate, and scrapers are fixedly connected to both the left and right sides of the connecting plate, and connecting rings are fixedly connected to the opposite surfaces of the two scrapers.

[0007] Preferably, the number of the rotating shaft, the second gear, and the third stirring blade are all arranged in two sets symmetrically on both sides of the stirring shaft.

[0008] Preferably, three first stirring blades are fixedly connected to the lower end of the connecting ring.

[0009] Preferably, a feed hopper is fixedly connected to the middle side of the mixing tank, and a detachable filter basket is provided on the inner wall of the feed hopper.

[0010] Preferably, the bottom of the mixing tank is funnel-shaped and a discharge pipe is fixedly connected to the bottom.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The anti-sticking treatment device on the inner wall of the mixing tank of the mixing and slurry forming device effectively avoids the problems of fiber entanglement on the gear shaft and particle blockage of the tooth side gap by setting the first gear, the second gear, and the gear ring in the relatively closed space formed by the turntable and the fixed ring mixing tank, and the gear meshing area is far away from the direct scouring range of the slurry. This ensures the long-term stable operation of the transmission system and reduces the equipment failure rate.

[0012] 2. The mixing tank of this slurry-forming device has an anti-sticking treatment device on the inner wall. The polytetrafluoroethylene coating sprayed on the inner wall of the mixing tank utilizes the low surface energy characteristics to reduce slurry adhesion. The synchronously moving scraper closely scrapes against the inner wall, forcibly scraping off the already adhered slurry and avoiding the formation of a stubborn sticky layer. This design not only reduces the frequency and cost of manual cleaning, but also keeps the inside of the tank clean and prevents residual slurry from deteriorating and affecting product quality. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the anti-sticking treatment device for the inner wall of the mixing tank of the mixing and slurry forming device according to the present invention. Figure 2This is a schematic diagram of the mixing tank of this utility model; Figure 3 This is a schematic diagram of the scraper of this utility model; Figure 4 This is a schematic diagram of the third stirring blade of this utility model; Figure 5 This is a schematic diagram of the second stirring blade of this utility model; Figure 6 This is a schematic diagram of the filter basket of this utility model.

[0014] Reference numerals in the attached drawings: 1. Mixing tank; 2. Feed hopper; 3. Discharge pipe; 4. Drive motor; 5. Mixing shaft; 6. Fixing ring; 7. Turntable; 8. Gear ring; 9. First gear; 10. Rotating shaft; 11. Second gear; 12. Connecting plate; 13. Scraper; 14. Connecting ring; 15. First mixing blade; 16. Second mixing blade; 17. Third mixing blade; 18. Filter basket. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Please see Figure 1-6This utility model provides a technical solution: an anti-sticking treatment device for the inner wall of the mixing tank of a slurry forming device, including a mixing tank 1, the inner wall of the mixing tank 1 being coated with polytetrafluoroethylene, a mixing assembly, the mixing assembly being disposed on the mixing tank 1, the mixing assembly including a drive motor 4, the drive motor 4 being fixedly connected to the upper end of the mixing tank 1, the output end of the drive motor 4 being fixedly connected to a mixing shaft 5, a fixing ring 6 being fixedly connected to the inner wall of the mixing tank 1, a turntable 7 being rotatably connected to the upper end of the fixing ring 6, the mixing tank 1 and the turntable 7 being rotatably connected to the mixing shaft 5, a second mixing blade 16 being fixedly connected to the lower end surface of the mixing shaft 5, a gear ring 8 being fixedly connected to the inner wall of the mixing tank 1, a first gear 9 being fixedly connected to the surface of the mixing shaft 5, a rotating shaft 10 being rotatably connected inside the turntable 7, a second gear 11 being fixedly connected to the surface of the rotating shaft 10, the first gear 9 and the gear ring 8 being meshed with the second gear 11, and a third mixing blade 17 being fixedly connected to the lower end of the rotating shaft 10.

[0020] The mixing tank 1 is equipped with a connecting plate 12. The rotating shaft 10 is rotatably connected to the connecting plate 12. Scrapers 13 are fixedly connected to both the left and right sides of the connecting plate 12. A connecting ring 14 is fixedly connected to the opposite face of the two scrapers 13.

[0021] The number of rotating shaft 10, second gear 11 and third stirring blade 17 are all arranged in two sets, symmetrically on both sides of stirring shaft 5.

[0022] Three first stirring blades 15 are fixedly connected to the lower end of the connecting ring 14.

[0023] A feed hopper 2 is fixedly connected to the middle side of the mixing tank 1, and a detachable filter basket 18 is provided on the inner wall of the feed hopper 2.

[0024] The bottom of the mixing tank 1 is funnel-shaped and a discharge pipe 3 is fixedly connected to the bottom.

[0025] When using the device, the raw material to be mixed enters the device through the feed hopper 2 on the side of the middle part of the mixing tank 1. The detachable filter basket 18 set on the inner wall of the feed hopper 2 will perform preliminary filtration of the raw material, intercepting large impurities or foreign objects to prevent them from entering the mixing tank 1 and affecting the mixing effect or damaging the equipment; the filtered raw material slides down the feed hopper 2 into the mixing tank 1. After the device is started, the drive motor 4, which is fixed to the upper end of the mixing tank 1, outputs power to drive the mixing shaft 5, which is fixedly connected to it, to rotate. The mixing shaft 5, as the core transmission component, drives multiple mixing structures to operate synchronously through gear meshing. The first gear 9 on the surface of the stirring shaft 5 meshes with the second gear 11 on two sets of symmetrically distributed rotating shafts 10. At the same time, the second gear 11 meshes with the gear ring 8 fixed on the inner wall of the stirring tank 1. When the stirring shaft 5 rotates, the first gear 9 drives the second gear 11 to rotate around its own axis. At the same time, due to the meshing action of the second gear 11 and the gear ring 8, the rotating shaft 10 will move in a circular motion around the stirring shaft 5 with the turntable 7. Multiple sets of mixing blades precisely mix different areas of the mixing tank 1 to ensure uniform mixing of the slurry: The third stirring blades 17 at the lower end of the two sets of rotating shafts 10, while rotating and revolving with the rotating shafts 10, stir the slurry in the upper and middle parts of the mixing tank 1 in all directions, and use rotational shear force to break up the slurry agglomeration and promote the fusion of fibers and additives. The three first stirring blades 15 at the lower end of the connecting ring 14 move synchronously with the scraper 13 and the connecting ring 14, focusing on stirring the slurry in the bottom area of ​​the mixing tank 1 to prevent the slurry from settling at the bottom; The second stirring blade 16 on the lower surface of the stirring shaft 5 acts directly on the middle position of the bottom of the stirring tank 1, further enhancing the stirring effect in the central area of ​​the bottom, and working in synergy with the first stirring blade 15 to ensure that there are no dead corners in the stirring at the bottom of the tank.

[0026] The polytetrafluoroethylene coating sprayed on the inner wall of the mixing tank 1 has low viscosity, which can reduce the adhesion of slurry. At the same time, the connecting plate 12, which moves synchronously with the rotating shaft 10, drives the scrapers 13 on the left and right sides to move in a circular motion close to the inner wall of the mixing tank 1. During the movement, the scrapers 13 continuously scrape the inner wall, scraping the slurry that has been attached into the tank to participate in the mixing again, thus solving the problem of material sticking to the inner wall.

[0027] The scraper 13 maintains structural stability through the connecting ring 14. Its movement trajectory covers the upper and middle areas of the inner wall of the mixing tank 1. It works in conjunction with the funnel-shaped design at the bottom of the tank to prevent slurry residue from remaining in the non-mixing area.

[0028] The slurry, after being thoroughly stirred and mixed evenly, gathers at the bottom of the mixing tank 1 under the action of gravity. Since the bottom of the tank is funnel-shaped, the slurry can flow naturally to the discharge pipe 3 at the center of the bottom, and finally be discharged from the device through the discharge pipe 3 to enter the subsequent process.

[0029] Furthermore, by setting the first gear 9, the second gear 11, and the gear ring 8 in the relatively enclosed space formed by the turntable 7, the fixed ring 6, and the mixing tank 1, and with the gear meshing area far away from the direct scouring range of the slurry, the problems of fiber entanglement on the gear shaft and particle blockage of the tooth side gap are effectively avoided, ensuring the long-term stable operation of the transmission system and reducing the equipment failure rate.

[0030] Through multi-stage layered synergistic mixing: the third mixing blade 17 moves with the rotating shaft 10 in a "rotation + revolution" compound motion, covering the upper and middle areas of the mixing tank 1; the first mixing blade 15 mixes the bottom edge, and the second mixing blade 16 focuses on the bottom center area. The three form a three-dimensional mixing network, eliminating dead corners in the tank, ensuring that the fiber, water and additives are fully integrated, improving the uniformity of the slurry, and providing high-quality raw materials for the subsequent papermaking process.

[0031] The polytetrafluoroethylene coating sprayed on the inner wall of the mixing tank 1 utilizes its low surface energy properties to reduce slurry adhesion; the synchronously moving scraper 13 continuously scrapes against the inner wall, forcibly scraping off the already adhered slurry and avoiding the formation of a stubborn sticky layer; this design not only reduces the frequency and cost of manual cleaning, but also keeps the inside of the tank clean and prevents residual slurry from deteriorating and affecting product quality.

[0032] Structural Description: Mixing Tank 1: As the core container, it provides a closed space for mixing slurry; the inner wall is coated with polytetrafluoroethylene, which reduces slurry adhesion by utilizing its low surface energy properties, thus achieving passive anti-sticking; Feed hopper 2: Used for raw material introduction, its inclined side design guides the material smoothly into the mixing tank 1; the removable filter basket 18 on the inner wall can intercept large impurities in the raw material, ensuring smooth subsequent mixing; Discharge pipe 3: Located at the center of the bottom of mixing tank 1, and with the funnel-shaped bottom design, the mixed slurry is discharged in a concentrated manner under the action of gravity, reducing residue; Drive motor 4: As a power source, it outputs torque to drive the stirring shaft 5 to rotate, providing power for the entire stirring and transmission system; Stirring shaft 5: The core transmission component, which is connected to the drive motor 4 and drives the first gear 9 and the second stirring blade 16 to rotate synchronously. At the same time, it drives the movement of other components through gear meshing. Fixed ring 6: Fixed to the inner wall of the mixing tank 1, providing rotational support for the turntable 7 and ensuring that the turntable 7 stably rotates around the mixing shaft 5; Turntable 7: Rotatably connected to the fixed ring 6, it carries the rotating shaft 10 and moves in a circular motion with the stirring shaft 5, providing a stable trajectory for the revolution of the rotating shaft 10; Gear ring 8: Fixed to the inner wall of the mixing tank 1, meshing with the second gear 11, and cooperating with the first gear 9 to drive the rotating shaft 10 to achieve a "rotation + revolution" compound motion; First gear 9: Fixed to the surface of stirring shaft 5, meshing with second gear 11, transmitting the rotational power of stirring shaft 5 to rotating shaft 10, driving it to rotate; Rotating shaft 10: Symmetrically distributed on both sides of stirring shaft 5, it performs "rotation + revolution" motion under the coordinated action of first gear 9 and gear ring 8, driving the third stirring blade 17 and connecting plate 12 to move synchronously; The second gear 11 is fixed on the surface of the rotating shaft 10 and meshes with the first gear 9 and the gear ring 8. It is a key transmission component for realizing the compound motion of the rotating shaft 10. Connecting plate 12: connects the rotating shaft 10 and the scraper 13, moves with the rotating shaft 10 and drives the scraper 13 to move synchronously, ensuring the stable operation of the scraper 13; Scraper 13: It closely adheres to the inner wall of the mixing tank 1 and moves in a circular motion with the connecting plate 12. Through continuous scraping, it forcibly scrapes off the slurry adhering to the inner wall, thereby achieving active anti-sticking and avoiding residue. Connecting ring 14: connects the scrapers 13 on both sides, enhancing the structural stability of the scrapers 13; at the same time, it carries the first stirring blade 15 and drives it to move synchronously. First stirring blade 15: Fixed to the lower end of connecting ring 14, it moves with scraper 13 and focuses on stirring the bottom edge area of ​​stirring tank 1 to prevent slurry from settling. The second stirring blade 16 is fixed to the lower end of the stirring shaft 5 and acts directly on the center of the bottom of the mixing tank 1 to strengthen the stirring in the center area of ​​the bottom and work together with the first stirring blade 15 to eliminate the dead corner at the bottom. The third stirring blade 17 is fixed at the lower end of the rotating shaft 10 and moves with the rotating shaft 10 in a compound motion of "rotation + revolution", covering the upper side and middle area of ​​the mixing tank 1, and using rotational shear force to promote slurry mixing. Filter basket 18: Located on the inner wall of feed hopper 2, the detachable design facilitates cleaning. It performs preliminary filtration of incoming raw materials, intercepting impurities to protect downstream equipment.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A device for preventing adhesion to the inner wall of a stirring tank of a slurry preparation device, characterized by: Including the mixing tank (1); The inner wall of the mixing tank (1) is coated with polytetrafluoroethylene. The mixing assembly is set on the mixing tank (1). The mixing assembly includes a drive motor (4). The drive motor (4) is fixedly connected to the upper end of the mixing tank (1). The output end of the drive motor (4) is fixedly connected to a stirring shaft (5). A fixed ring (6) is fixedly connected to the inner wall of the mixing tank (1). A turntable (7) is rotatably connected to the upper end of the fixed ring (6). Both the mixing tank (1) and the turntable (7) are rotatably connected to the mixing shaft (5). A second mixing blade (16) is fixedly connected to the lower end surface of the mixing shaft (5). A gear ring (8) is fixedly connected to the inner wall of the mixing tank (1), a first gear (9) is fixedly connected to the surface of the mixing shaft (5), a rotating shaft (10) is rotatably connected inside the turntable (7), and a second gear (11) is fixedly connected to the surface of the rotating shaft (10). The first gear (9) and the gear ring (8) are both meshed with the second gear (11), and the lower end of the rotating shaft (10) is fixedly connected with the third stirring blade (17).

2. A slurry agitator according to claim 1, wherein: The mixing tank (1) is provided with a connecting plate (12), and the rotating shaft (10) is rotatably connected to the connecting plate (12). Scrapers (13) are fixedly connected to both the left and right sides of the connecting plate (12), and connecting rings (14) are fixedly connected to the opposite surfaces of the two scrapers (13).

3. The slurry agitator according to claim 1, wherein: The number of the rotating shaft (10), the second gear (11) and the third stirring blade (17) are all arranged in two sets symmetrically on both sides of the stirring shaft (5).

4. The slurry agitator according to claim 2, wherein: The lower end of the connecting ring (14) is fixedly connected to three first stirring blades (15).

5. The slurry agitator according to claim 1, wherein: The mixing tank (1) is fixedly connected to the middle side of the feed hopper (2), and the inner wall of the feed hopper (2) is provided with a detachable filter basket (18).

6. A slurry agitator device according to claim 1, wherein: The bottom of the mixing tank (1) is funnel-shaped and a discharge pipe (3) is fixedly connected to the bottom.

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