Wall-hanging-preventing vertical stirring machine for plastic processing

Abstract

The invention relates to the field of plastic raw material processing, and discloses an anti-wall-hanging vertical stirring machine for plastic processing, which comprises a stirring tank, a rotary top cover, a spiral stirring machine, a revolution driving part, a sectional stirring part and a rotation driving part, and the revolution driving part drives the rotary top cover and the spiral stirring part to synchronously rotate; the rotation driving part drives the sectional stirring part to rotate firstly, then the sectional stirring part stops rotating when rotating until the edge part of the sectional stirring part abuts against the inner wall of the stirring tank, and the sectional stirring part keeps the state and continuously revolves for a certain stroke along with the rotating top cover. According to the invention, a multi-directional linkage stirring structure in which the spiral stirring part and the sectional stirring part are differentiated is adopted, so that the stirring coverage range is expanded, and the overall mixing uniformity of plastic raw materials is improved; the sectional type stirring piece can be tightly attached to the inner wall of the stirring tank to operate in the stalling and wall scraping stage, plastic materials attached to the inner wall are continuously and thoroughly stripped, raw materials are prevented from being hung on the wall and accumulated, and raw material loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of plastic raw material processing technology, specifically to a vertical mixer for plastic processing that prevents sticking to the wall. Background Technology

[0002] In the plastics processing industry, the uniformity of plastic raw material mixing and the accuracy of batching directly determine the mechanical properties, appearance quality and molding stability of plastic products. Vertical mixers, with their advantages of compact structure, high mixing efficiency and strong adaptability, have become the most commonly used material mixing equipment in plastic granulation, recycled material recycling and plastic modification processes. They are widely used in the mixing of various plastic granules, plastic powders, crushed recycled materials and additives such as PE, PP, and ABS.

[0003] Most existing vertical mixers for plastic processing adopt a structure with a vertical cylinder and a central spiral mixing shaft. The motor is usually located at the top of the equipment. Through the high-speed rotation of the spiral mixing shaft, the plastic material at the bottom of the cylinder is continuously lifted to the top of the cylinder and then flows back to the bottom of the cylinder, realizing the material circulating and tumbling up and down and being fully mixed.

[0004] However, in actual plastic processing and production, existing vertical mixers have the following technical defects: Existing equipment relies solely on the central spiral stirring shaft to lift materials up and down, resulting in limited stirring coverage. It can only achieve material circulation in the central area of ​​the tank, while materials in the edge areas of the tank cannot be effectively stirred, forming obvious stirring blind zones and making it difficult to achieve uniform mixing throughout the entire area. At the same time, the stirring action lacks fine disturbance, failing to break up the agglomeration of easily agglomerated materials such as ultrafine plastic powder and modified additives, leading to uneven mixing of raw materials in small areas. Furthermore, gaps exist between the stirring components and the inner wall, making it easy for viscous and electrostatically adsorbed plastic materials to adhere to the inner wall of the tank. The retained wall-mounted material cannot participate in normal stirring circulation, affecting the overall mixing effect and causing material waste.

[0005] Therefore, existing vertical mixers for plastic processing have technical problems such as many dead zones in mixing, insufficient fine mixing, and difficulty in cleaning materials adhering to the walls. Summary of the Invention

[0006] Therefore, the present invention provides a vertical mixer for plastic processing that prevents material from sticking to the wall, effectively solving the technical problems of existing vertical mixers for plastic processing having many dead corners, insufficient mixing fineness, and difficulty in cleaning materials stuck to the wall.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a vertical mixer for plastic processing with anti-wall adhesion, comprising: A mixing tank with a discharge pipe installed at the bottom; The rotating top cover is movably mounted on the top of the mixing tank; A spiral stirring element is installed at the bottom of the rotating top cover and corresponds to the center position inside the mixing tank; A revolution drive component is installed outside the mixing tank and is connected to the rotating top cover in a transmission manner. The revolution drive component drives the rotating top cover and the spiral mixing component to rotate synchronously. The segmented agitator is installed at the bottom of the rotating top cover and corresponds to the position inside the mixing tank near the side wall. The segmented agitator can revolve around the central axis of the mixing tank along with the rotating top cover. The self-rotation drive is installed on the top of the rotating top cover. During each stroke of the segmented stirring component as it revolves with the rotating top cover, the self-rotation drive drives the segmented stirring component to rotate first, and then rotates back to its edge and stops rotating when it abuts against the inner wall of the mixing tank. It then maintains this state and continues to revolve with the rotating top cover for a certain period of time.

[0008] Furthermore, the mixing tank is composed of a first tank body, a second tank body, and a third tank body connected sequentially from top to bottom; The first tank and the third tank are both cylindrical tank structures, while the second tank is a conical tank structure; The diameter of the first tank is larger than that of the third tank, and the discharge pipe is installed on the side wall of the second tank near the bottom.

[0009] Furthermore, the spiral stirring component includes a stirring shaft and spiral blades mounted on the outer wall of the stirring shaft; The stirring shaft is fixedly mounted on the rotating top cover, and the top end of the stirring shaft extends out of the stirring tank.

[0010] Furthermore, the revolution drive includes a first mounting base mounted on the rotating top cover and a transmission wheel mounted on the top of the stirring shaft; The stirring shaft is mounted through the first mounting base. A fixed base is installed on the top side wall of the stirring tank. A drive motor is mounted on the fixed base. The drive end of the drive motor is connected to a drive wheel. The drive wheel and the transmission wheel are connected by a transmission belt.

[0011] Furthermore, an mounting ring seat is installed on the top of the mixing tank, and the rotating top cover is rotatably installed on the inner circumference of the mounting ring seat; A second mounting base is vertically fitted onto the rotating top cover near its edge.

[0012] Furthermore, the segmented stirring component includes a first rotating shaft that is mounted through the second mounting base, a first stirring blade mounted on the first rotating shaft, a first rotating column that is rotatably mounted at the bottom of the first rotating shaft, and a second rotating column mounted at the bottom of the first rotating column; A second rotating shaft is coaxially mounted at the end of the second rotating column, and a second stirring blade is mounted on the second rotating shaft. A third rotating column is mounted at the end of the second rotating shaft away from the second rotating column, and a fourth rotating column is mounted at the bottom of the third rotating column. The second rotating column and the first rotating column, as well as the third rotating column and the fourth rotating column, are rotatably connected by a cross shaft. A fixing ring is mounted on the outer wall of the stirring shaft, and an installation rod is fixed on the outer circumference of the fixing ring. A connecting bolt is provided at the end of the installation rod in the vertical direction, and the fourth rotating column is rotatably mounted on the connecting bolt. The first rotating shaft is parallel to the inner wall of the first tank, and the second rotating shaft is located inside the second tank and is parallel to the inside of the second tank.

[0013] Furthermore, the self-rotation drive includes a first drive gear and a second drive gear coaxially mounted on the first rotating shaft, and a rotating rod installed between the first rotating shaft and the stirring shaft; One end of the rotating rod is fixedly connected to the stirring shaft, and the other end is rotatably connected to the first rotating shaft. The first driving gear is located below the rotating rod, and the second driving gear is located above the rotating rod. A rotating ring plate is rotatably mounted on the mounting ring seat. A first connecting ring plate is horizontally mounted at the top of the rotating ring plate. A second connecting ring plate is vertically mounted at the end of the first connecting ring plate. A plurality of first racks are evenly spaced on the inner circumference of the rotating ring plate. A plurality of second racks are evenly spaced on the outer circumference of the second connecting ring plate. The number of first racks and second racks is the same. During the process of the first drive gear and the second drive gear revolving around the first rotating shaft, the second drive gear first meshes with the second rack and drives the first rotating shaft to rotate clockwise. When the second drive gear completely disengages from the second rack, the first drive gear meshes with the first rack and drives the first rotating shaft to rotate counterclockwise.

[0014] Furthermore, a horizontal ring plate is connected to the inner circumference of the second connecting ring plate. The horizontal ring plate is provided with a plurality of through slots. A lifting bolt is movably arranged in the through slot. A first spring is provided between the lifting bolt and the through slot. A pressure ring seat is connected to the top of the lifting bolt. A friction ring seat is connected to the bottom of the lifting bolt. A friction ring strip is provided on the rotating rod at the position opposite to the friction ring seat. A through hole is provided on the rotating rod, and a movable bolt is movably disposed in the through hole. A pressing plate is installed on the top of the movable bolt, and a second spring is sleeved on the movable bolt. One end of the second spring is connected to the pressing plate, and the other end is connected to the top of the rotating rod. Limit buckles are connected to both ends of the movable bolt. A connecting ring seat is installed on the top of the pressing plate. The connecting ring seat is hollow inside and has a pressing ring. A third spring is installed at the bottom of the connecting ring seat. The end of the third spring is connected to the pressing ring. The bottom of the pressing ring passes through the connecting ring seat and is directly opposite the top of the pressing plate. The connecting ring seat and the mounting ring seat are fixedly connected by a connecting bracket. A pressing cylinder is installed on the top of the pressing ring. The pressing ring is pressed down and applies pressure to the pressing plate. The pressing plate is pressed down and pushes the friction ring seat against the friction ring bar. The horizontal ring plate, the second connecting ring plate, the first connecting ring plate and the rotating ring plate revolve synchronously with the rotating rod.

[0015] Furthermore, the rotating top cover is provided with a feeding port, and a sealing plate is installed on the feeding port.

[0016] Compared with the prior art, the present invention has the following advantages: This invention employs a differentiated, multi-directionally linked stirring structure using spiral and segmented stirring components to construct a full-area stirring system with central lifting and edge agitation. This expands the stirring coverage area, achieving no dead corners in the stirring zone, eliminating stirring blind spots at the edges and bottom of the mixing tank, and ensuring that all plastic materials in the tank can participate in the circulating stirring, thereby improving the overall uniformity of plastic raw material mixing. This invention utilizes the rotational force of a segmented stirring component during both clockwise and counterclockwise rotations to finely agitate and stir the surrounding plastic materials, effectively breaking up agglomerated materials, refining the material dispersion state, and improving the uniformity of mixing various plastic raw materials in a small area. In this invention, the segmented agitator can closely adhere to the inner wall of the mixing tank during the stop-and-scrape phase, continuously and thoroughly peeling off the plastic material adhering to the inner wall. On the one hand, this prevents the material adhering to the wall from leaving the mixing cycle and affecting the overall mixing quality, ensuring the continuity and uniformity of the mixing process. On the other hand, during the discharge phase, residual raw materials in the tank can be cleaned simultaneously, preventing the accumulation of raw materials on the wall and reducing raw material loss. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of a vertical mixer for plastic processing that prevents wall adhesion, provided in an embodiment of the present invention; Figure 2A top view of a vertical mixer for plastic processing with anti-wall adhesion provided in an embodiment of the present invention; Figure 3 This is a front view structural diagram of a vertical mixer for plastic processing that prevents wall adhesion, provided in an embodiment of the present invention. Figure 4 for Figure 2 A three-dimensional sectional view along the AA direction; Figure 5 for Figure 4 Enlarged schematic diagram of the middle section structure; Figure 6 for Figure 4 A magnified structural diagram of A in the middle; Figure 7 for Figure 4 A magnified structural diagram of B in the diagram; Figure 8 for Figure 5 A magnified structural diagram of C; Figure 9 for Figure 5 A magnified structural diagram of D in the diagram; Figure 10 for Figure 3 A planar sectional view along the BB direction.

[0019] The labels in the diagram represent the following: 1. Mixing tank; 2. Discharge pipe; 3. Rotating top cover; 4. Spiral agitator; 5. Revolution drive; 6. Segmented agitator; 7. Rotation drive; 8. First tank body; 9. Second tank body; 10. Third tank body; 11. Mounting ring seat; 12. Second mounting seat; 13. Sealing plate; 41. Stirring shaft; 42. Spiral blades; 51. First mounting base; 52. Transmission wheel; 53. Fixed base; 54. Drive motor; 55. Drive wheel; 56. Transmission belt; 61. First rotating shaft; 62. First stirring blade; 63. First rotating column; 64. Second rotating column; 65. Second rotating shaft; 66. Second stirring blade; 67. Third rotating column; 68. Fourth rotating column; 69. Cross shaft; 610. Retaining ring; 611. Mounting rod; 612. Connecting bolt; 71. First drive gear; 72. Second drive gear; 73. Rotating rod; 74. Rotating ring plate; 75. First connecting ring plate; 76. Second connecting ring plate; 77. First rack; 78. Second rack; 79. Horizontal ring plate; 710. Through slot; 711. Lifting bolt; 712. First spring; 713. Pressure ring seat; 714. Friction ring seat; 715. Friction ring bar; 716. Through hole; 717. Movable bolt; 718. Pressing plate; 719. Second spring; 720. Limit buckle; 721. Connecting ring seat; 723. Pressing ring; 724. Third spring. Detailed Implementation

[0020] 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.

[0021] like Figures 1-5 As shown, this invention discloses a vertical mixer for plastic processing that prevents sticking to the wall. The whole machine structure includes a mixing tank 1, a rotating top cover 3, a spiral mixing component 4, a revolution drive component 5, a segmented mixing component 6, and a rotation drive component 7, etc. The various structures cooperate with each other and work together to achieve efficient mixing of plastic raw materials in all directions, and solve the problems of raw materials sticking to the wall and insufficient mixing, thus adapting to the mixing and processing needs of various plastic raw materials.

[0022] The mixing tank 1 serves as the raw material carrier and mixing chamber of the whole machine. The bottom of the tank is fixedly installed with the discharge pipe 2 for the smooth discharge of plastic raw materials after mixing. The discharge pipe 2 is equipped with a controllable valve. The valve can be either manually operated or electrically controlled. After the mixing operation is completed, opening the valve can realize the directional discharge of the uniformly mixed plastic raw materials in the tank. Closing the valve can ensure the sealing of the tank during the mixing process and prevent the raw materials from leaking out. The rotating top cover 3 is movably mounted on the top of the mixing tank 1. It is a movable structure that can rotate around the central axis of the mixing tank 1. It is the transmission carrier for the mixing action of the whole machine. On the one hand, it serves as the mounting base for the spiral mixing component 4, driving the spiral mixing component 4 to complete the rotation mixing around its own axis. On the other hand, it serves as the bearing structure for the segmented mixing component 6, synchronously driving the segmented mixing component 6 to complete the revolution motion around the central axis of the mixing tank 1. At the same time, it cooperates with the rotation drive component 7 to realize the rotation of the segmented mixing component 6. The spiral agitator 4 is fixedly installed at the bottom of the rotating top cover 3 and corresponds to the central area inside the mixing tank 1, and is synchronously linked with the rotating top cover 3. When the rotating top cover 3 is running, the spiral agitator 4 continuously rotates around its own axis. Relying on the special spiral structure, it generates an axial lifting force from bottom to top during the rotation process, which continuously transports the raw materials deposited at the bottom of the mixing tank 1 upward, breaks the stratification state of the bottom raw materials being deposited and the top raw materials being suspended, promotes the vertical convection and full mixing of the raw materials in the central area of ​​the tank, and achieves uniform mixing of the upper and lower layers of raw materials in the tank. The revolution drive component 5 is installed outside the mixing tank 1 and is connected to the rotating top cover 3 for transmission. As the power source of the whole machine, it provides revolution drive force for the rotating top cover 3. After the revolution drive component 5 is started, it drives the rotating top cover 3 to rotate at a constant speed around the central axis of the mixing tank 1, thereby driving the spiral mixing component 4 and the segmented mixing component 6 to complete the revolution motion synchronously. The segmented agitator 6 is installed at the bottom of the rotating top cover 3, corresponding to the edge area of ​​the mixing tank 1 near the tank wall. It forms a complementary mixing layout with the spiral agitator 4. The segmented agitator 6 can follow the rotating top cover 3 to complete the revolution around the central axis of the mixing tank 1, and form a linkage with the spiral agitator 4 in the central area: the spiral agitator 4 focuses on axial lifting and mixing to achieve uniform mixing of raw materials in the tank; the segmented agitator 6 focuses on stirring the area around the inner wall of the mixing tank 1. During the revolution, it continuously disturbs the raw materials in the areas that are prone to stagnation, such as the periphery of the tank wall and the corners of the inner edge of the tank, breaking the local accumulation of raw materials; at the same time, the segmented agitator 6 rotates synchronously during the revolution, further improving the mixing intensity in a small area and refining the mixing effect of raw materials; when the edge of the segmented agitator 6 touches the inner wall of the mixing tank 1, it can form a scraping action by relying on the revolution to continuously peel off the plastic raw materials attached to the tank wall, avoiding the raw materials from adhering to the inner wall for a long time and leaving the mixing system, thus solving the problem of raw materials not being mixed evenly on the tank wall and leaving residues on the wall after discharge; The self-rotating drive component 7 is fixedly installed on the top of the rotating top cover 3 and is connected to the segmented stirring component 6 for transmission, realizing a cyclical operation process of "clockwise rotation-reverse rotation-stop". When the segmented stirring component 6 revolves with the rotating top cover 3, the self-rotating drive component 7 controls it to first start clockwise rotation in each segment of its revolution with the rotating top cover 3, relying on the rotational motion to stir the surrounding raw materials and improve the local stirring effect. When one edge of the segmented stirring component 6 approaches the inner wall of the mixing tank 1, the self-rotating drive component 7 drives the segmented stirring component 6 to rotate counterclockwise to reset and return to the initial state. During the process, the other edge of the segmented agitator 6 gradually presses against the inner wall of the mixing tank 1. Due to the limiting effect of the inner wall, it can no longer rotate. At this time, it stops rotating while maintaining its current rotation posture and only continues to revolve with the rotating top cover 3. The edge of the segmented agitator 6 that is in contact with the inner wall forms a continuous scraping force to thoroughly scrape off the plastic material adhering to the inner wall. After completing the scraping operation of one stroke, it immediately enters the next stroke cycle. Within one revolution cycle, the segmented agitator 6 completes multiple "clockwise-reverse-stop" cycles, which have the dual functions of edge mixing and inner wall scraping.

[0023] This invention constructs a full-area mixing system with central lifting and edge stirring by using a spiral stirring component 4 and a segmented stirring component 6 in a differentiated and multi-directional linkage. This system broadens the mixing coverage, eliminates dead corners in the tank, and achieves all-round and fine mixing of plastic raw materials, thereby improving the overall mixing efficiency and mixing quality. The segmented mixing component 6 features a unique circulating operation mode, offering advantages in efficient mixing and preventing wall adhesion: During the rotation and gyration stages, it utilizes its own rotational force to finely agitate the surrounding plastic raw materials, breaking up material agglomeration and improving the uniformity of material mixing in small areas; during the stop-rotation wall scraping stage, its tightly fitted structural design against the inner wall of the mixing tank 1 continuously and thoroughly peels off the material adhering to the inner wall. This avoids the problem of raw materials on the tank wall not being able to participate in the mixing process, affecting the overall mixing quality, and also cleans up residual raw materials in the tank during the discharge stage, preventing material buildup on the walls and waste, while reducing the difficulty of subsequent tank cleaning, thus meeting the needs of large-scale and refined plastic processing production.

[0024] To address the issues of edge and corner accumulation and poor material flow during the mixing and feeding of plastic raw materials, this invention improves the mixing tank 1 with a segmented structure, as detailed below: like Figure 4 As shown, the mixing tank 1 adopts a three-section split structure, consisting of a first tank 8, a second tank 9, and a third tank 10 from top to bottom. The tank sections are closely connected to form an integrated mixing and bearing cavity. The first tank 8 and the third tank 10 both adopt a regular cylindrical structure, while the second tank 9 adopts a conical structure that is wider at the top and narrower at the bottom. The diameter of the first tank 8 is larger than the diameter of the third tank 10. The discharge pipe 2 is installed on the side wall of the second tank 9 near the bottom.

[0025] The differentiated three-section tank design is tailored to the flow characteristics and gravity discharge patterns of plastic raw materials: the conical second tank 9 serves as a transition section between the first tank 8 and the second tank 9, forming a gentle sloping guide surface. This not only receives the raw materials falling from the first tank 8, preventing them from accumulating at the tank junction, but also guides the raw materials smoothly along the conical surface to the third tank 10 and the discharge pipe 2. Simultaneously, the scraping action of the segmented agitator 6 and the lifting and mixing effect of the spiral agitator 4 further ensure that there is no raw material residue in the tank, achieving a smooth and efficient mixing and discharge process.

[0026] In this invention, the spiral stirring element 4 continuously rotates around its own axis, generating axial lifting force based on its special spiral structure to achieve upward conveying of raw materials from the bottom. The detailed structural design of the spiral stirring element 4 is as follows: like Figure 4 As shown, the spiral stirring component 4 is mainly composed of a stirring shaft 41 and an integrated spiral blade 42. The stirring shaft 41, as the core transmission component of the spiral stirring component 4, is installed at the center of the rotating top cover 3. The top end of the stirring shaft 41 extends upward and passes through the outside of the stirring tank 1, so as to achieve a stable transmission connection with the rotating top cover 3 and receive the rotational power transmitted by the revolution drive component 5. When the stirring shaft 41 rotates synchronously with the rotating top cover 3, it can drive the spiral blades 42 on the outer wall to rotate at a uniform speed. As the spiral blades 42 rotate with the stirring shaft 41, they continuously exert an upward pushing force on the plastic raw material deposited at the bottom of the mixing tank 1, conveying the material accumulated at the bottom of the tank upward layer by layer. Combined with the edge stirring operation of the segmented stirring component 6, the material inside the tank is convected and mixed throughout the entire area. At the same time, the rotation and stirring of the spiral blades 42 can also break up the clumps of plastic raw material, refine the particle state of the raw material, and further improve the overall mixing uniformity. Combined with the flow guiding structure of the three-section mixing tank 1, dead corners in stirring and feeding are eliminated.

[0027] In this invention, the revolution drive component 5 is installed outside the mixing tank 1 and is connected to the rotating top cover 3 for transmission, providing revolution drive force for the rotating top cover 3. The specific structure of the revolution drive component 5 is as follows: like Figure 2 and Figure 4As shown, the revolution drive component 5 includes a first mounting base 51, a transmission wheel 52, a fixed base 53, a drive motor 54, a drive wheel 55, and a transmission belt 56. The first mounting base 51 is fixedly mounted on the rotating top cover 3 and keeps synchronously linked with the rotating top cover 3. The stirring shaft 41 is vertically installed through the first mounting base 51. The fixed base 53 is fixedly installed on the outer side of the top of the mixing tank 1. The fixed base 53 serves as a bearing base and is equipped with the drive motor 54. The output drive end of the drive motor 54 is coaxially connected to the drive wheel 55. The transmission wheel 52 is fixedly sleeved at the part of the top of the stirring shaft 41 that protrudes from the mixing tank 1. The transmission wheel 52 and the drive wheel 55 are connected by the transmission belt 56.

[0028] When the whole machine starts to revolve, the drive motor 54 is powered on and runs, driving the drive wheel 55 at the end to rotate at a constant speed. Relying on the friction and traction of the transmission belt 56, it synchronously drives the transmission wheel 52 to rotate coaxially, thereby driving the stirring shaft 41 to rotate stably. After the stirring shaft 41 rotates, it further drives the rotating top cover 3, which is fixed to it, to revolve synchronously around the central axis of the mixing tank 1, and finally realizes the linkage of the spiral stirring component 4 and the segmented stirring component 6.

[0029] In this invention, a mounting ring seat 11 is fixedly assembled on the top end face of the mixing tank 1. The mounting ring seat 11 is coaxially arranged with the mixing tank 1. The rotating top cover 3 is correspondingly rotatably embedded in the inner circumference of the mounting ring seat 11. The two adopt a clearance fit rotational connection form, which can not only ensure that the rotating top cover 3 revolves smoothly around the central axis of the mixing tank 1, avoiding radial offset, jamming and shaking during rotation, but also enhance the sealing of the top of the tank, preventing dust and raw material debris from leaking out during the mixing process.

[0030] A second mounting base 12 is vertically oriented and embedded at a corresponding position near the outer periphery of the rotating top cover 3. The second mounting base 12 is tightly connected to the rotating top cover 3 and moves synchronously, which can ensure that the segmented stirring component 6 is firmly assembled.

[0031] In this invention, the segmented stirring element 6 is installed at the bottom of the rotating top cover 3, corresponding to the edge area of ​​the mixing tank 1 near the tank wall, forming a complementary stirring layout with the spiral stirring element 4. The specific structure of the segmented stirring element 6 is as follows: like Figure 4 , Figure 6 and Figure 7 As shown, the segmented stirring component 6 includes core components such as a first rotating shaft 61, a first stirring blade 62, a first rotating column 63, a second rotating column 64, a second rotating shaft 65, a second stirring blade 66, a third rotating column 67, a fourth rotating column 68, and a cross shaft 69. The first rotating shaft 61 is vertically installed inside the second mounting base 12 and can rotate relative to the second mounting base 12. It serves as the power input shaft for the segmented stirring component 6, and the orientation of the first rotating shaft 61 is parallel to the inner wall of the first tank 8. The first stirring blade 62 is fixedly mounted on the outer wall of the first rotating shaft 61 and rotates synchronously with the first rotating shaft 61 to agitate the raw materials in the upper edge area of ​​the tank. The bottom of the first rotating shaft 61 is rotatably connected to the first rotating column 63. The bottom end of the first rotating column 63 is equipped with a second rotating column 64. The end of the second rotating column 64 away from the first rotating column 63 is coaxially fixed to the second rotating shaft 65. The second rotating shaft 65 is located inside the second tank body 9 and is arranged in a parallel position to the inner wall of the second tank body 9, in an inclined arrangement. The second rotating shaft 65 is fitted with a second stirring blade 66, which rotates synchronously with the second rotating shaft 65 to specifically stir the raw materials around the inclined wall of the second tank 9, preventing the accumulation of raw materials in this area; a third rotating column 67 is fixedly installed at the end of the second rotating shaft 65 away from the second rotating column 64, and the bottom of the third rotating column 67 is connected to the fourth rotating column 68. The second rotating column 64 and the first rotating column 63, and the third rotating column 67 and the fourth rotating column 68 are all rotatably connected by a cross shaft 69; a fixing ring 610 is fixedly sleeved on the outer wall of the stirring shaft 41, and a rod 611 is fixedly installed radially on the outer circumference of the fixing ring 610. A connecting bolt 612 is arranged vertically at the end of the mounting rod 611, and the fourth rotating column 68 is correspondingly rotatably sleeved on the connecting bolt 612 to achieve directional limiting of the bottom of the segmented stirring component 6.

[0032] The aforementioned first rotating column 63, second rotating column 64, third rotating column 67, and fourth rotating column 68, together with two sets of cross shafts 69, constitute a complete universal joint transmission structure. Utilizing the adaptive transmission characteristics of the universal joint, it adapts to the different orientation requirements of the first rotating shaft 61 being arranged vertically and the second rotating shaft 65 being arranged at an angle, ensuring that the first rotating shaft 61 and the second rotating shaft 65 can achieve synchronous self-rotation under the drive of the same drive source, and can also rotate stably around their respective central axes. During the specific linkage process, when the first rotating shaft 61 rotates, it can synchronously drive the second rotating column 64 to rotate around the central axis of the first rotating shaft 61. The first rotating column 63 drives the second rotating column 64 to rotate around the central axis of the second rotating shaft 65 through the cross shaft 69. The second rotating shaft 65 and the third rotating column 67 then operate in linkage. At the same time, the third rotating column 67 drives the fourth rotating column 68 to rotate synchronously through the cross shaft 69. This ensures that the blades of each segment of the segmented agitator 6 exert force synchronously and agitate the raw materials at the edge of the entire area. It also ensures that the edge of the agitator adheres to the tank wall and achieves stable wall scraping.

[0033] In this invention, the self-rotating drive component 7 is fixedly installed on the top of the rotating top cover 3 and is connected to the segmented stirring component 6 for transmission, realizing a cyclic operation process of "forward rotation-reverse rotation-stop". The specific structure of the self-rotating drive component 7 is as follows: like Figure 8 and Figure 10 As shown, the self-rotation drive component 7 is a gear and rack transmission assembly adapted to the revolution and rotation linkage of the segmented stirring component 6. It mainly includes a first drive gear 71 and a second drive gear 72 coaxially sleeved on the first rotating shaft 61, and a rotating rod 73 mounted between the first rotating shaft 61 and the stirring shaft 41. The components cooperate to achieve directional and timed self-rotation drive. The rotating rod 73 serves as a lateral support component for the first rotating shaft 61. One end is fixedly connected to the outer wall of the stirring shaft 41 and remains relatively stationary, while the other end is rotatably connected to the first rotating shaft 61. The first driving gear 71 and the second driving gear 72 are coaxially fixed on the first rotating shaft 61 and are arranged in a staggered manner. The first driving gear 71 is located below the rotating rod 73, and the second driving gear 72 is correspondingly located above the rotating rod 73, forming a double-layer gear transmission structure that adapts to different steering requirements. A rotating ring plate 74 is rotatably mounted on the mounting ring seat 11. The rotating ring plate 74 is coaxially arranged with the mounting ring seat 11 and can rotate flexibly. A first connecting ring plate 75 is horizontally extended from the top of the rotating ring plate 74. A second connecting ring plate 76 is vertically arranged downward from the end of the first connecting ring plate 75 away from the rotating ring plate 74. Several first racks 77 are fixed at equal intervals on the inner circumferential wall of the rotating ring plate 74, and several second racks 78 are fixed at equal intervals on the outer circumferential wall of the second connecting ring plate 76. The number and spacing of the first racks 77 and the second racks 78 are completely consistent.

[0034] When the machine is in operation, the first drive gear 71 and the second drive gear 72 revolve synchronously around the central axis of the mixing tank 1, following the first rotating shaft 61. Relying on the sequential meshing of the gears and racks, the segmented stirring components 6 are directionally rotated: During the revolution, the second drive gear 72 first meshes with the second rack 78, and under the action of the rack meshing force, it drives the first rotating shaft 61 to rotate clockwise. Then, through the universal joint transmission structure, it drives the first stirring blade 62 and the second stirring blade 66 to rotate clockwise synchronously, completing the fine stirring of the edge raw materials. As the revolution progresses, the second drive gear 72 gradually disengages from the second rack 78. At this time, the first drive gear 71 just meshes with the first rack 77, and then drives the first rotating shaft 61 to reverse direction and rotate counterclockwise. The first stirring blade 62 and the second stirring blade 66 rotate counterclockwise synchronously to reset, until the edges of the first stirring blade 62 and the second stirring blade 66 abut against the inner wall of the mixing tank 1.

[0035] The aforementioned gear and rack meshing structure enables the segmented stirring component 6 to switch between clockwise and counterclockwise rotation. To further achieve stable wall scraping during the stop phase and ensure that the first stirring blade 62 and the second stirring blade 66 continuously scrape against the tank wall without angular deviation, the present invention further designs the following structure: like Figure 5 and Figure 9As shown, a horizontal ring plate 79 extends horizontally from the inner circumferential wall of the second connecting ring plate 76. The horizontal ring plate 79 is fixed to the second connecting ring plate 76 as a whole. Several evenly arranged through slots 710 are vertically opened through the plate. A lifting bolt 711 is movably installed inside each through slot 710. A first spring 712 is provided between the lifting bolt 711 and the inner wall of the through slot 710 to press against each other. The lifting bolt 711 is elastically reset by relying on the first spring 712. The top end of the lifting bolt 711 is fixedly connected to the pressure ring seat 713, and the bottom end is fixedly connected to the friction ring seat 714. At the same time, a matching friction ring strip 715 is fixedly provided on the outer wall of the rotating rod 73 at the position opposite to the friction ring seat 714 to provide frictional support for the stop operation. A vertical through-hole 716 is made at the corresponding position of the rotating rod 73. A movable bolt 717 is inserted inside the through-hole 716. A pressing plate 718 is fixedly installed on the top of the movable bolt 717. A second spring 719 is sleeved on the outside of the movable bolt 717. The top of the second spring 719 abuts against the bottom surface of the pressing plate 718, and the bottom end abuts against the top surface of the rotating rod 73, so as to realize the elastic lifting and reset of the pressing plate 718. Limiting buckles 720 are fixedly connected to both the upper and lower ends of the movable bolt 717. The limiting buckles 720 limit the movement stroke of the movable bolt 717 to prevent slippage and displacement. The top of the pressing plate 718... A connecting ring seat 721 is fixedly assembled. The connecting ring seat 721 has a hollow cavity structure. A pressing ring 723 is embedded in the cavity. A third spring 724 is pressed and installed at the bottom of the connecting ring seat 721. The top of the third spring 724 is fixedly connected to the pressing ring 723 to realize the elastic reset of the pressing ring 723. The bottom of the pressing ring 723 vertically penetrates the bottom end of the connecting ring seat 721 and is set directly opposite the top surface of the pressing plate 718. At the same time, the connecting ring seat 721 is fixedly connected to the mounting ring seat 11 on the top of the mixing tank 1 through a fixed connecting bracket, keeping it in a stationary state and not rotating with the rotating top cover 3. A pressing cylinder is installed on the top of the pressing ring 723 as a power source for braking and stopping the rotation. The driving end of the pressing cylinder is set directly opposite the top surface of the pressing ring 723. When it is necessary to perform the stop and scrape action, the pressing cylinder is activated and drives the telescopic end to press down, applying vertical pressure to the pressing ring 723. The pressing ring 723 is pressed down to overcome the elastic force of the third spring 724 and continues to squeeze the pressing plate 718 during the downward movement. The pressing plate 718 is forced to overcome the elastic force of the second spring 719 and moves down, thereby simultaneously pushing the pressing ring seat 713 and the lifting bolt 711 to descend. While the lifting bolt 711 compresses the first spring 712, it drives the bottom friction ring seat 714 to approach and tightly abut against the friction ring bar 715 of the rotating rod 73. The two fit together to generate a sufficiently large static friction force. Under the constraint of static friction, the friction ring seat 714 and the friction ring bar 715 rotate synchronously, thereby driving the horizontal ring plate 79, the second connecting ring plate 76, the first connecting ring plate 75, and the rotating ring plate 74 to revolve synchronously with the rotating rod 73. At this time, the first rack 77, the second rack 78, the first drive gear 71, and the second drive gear 72 are in a relatively stationary state, and the gears and racks do not mesh. The first drive gear 71 and the second drive gear 72 stop rotating, thereby keeping the first rotating shaft 61, the first stirring blade 62, and the second stirring blade 66 stationary in their current posture, only completing a certain angle of revolution with the rotating top cover 3, realizing the static scraping of the raw material on the tank wall by the stirring blades. At the same time, this relatively stationary state can effectively avoid the blade deflection problem caused by the reaction force of the material. With the help of the locking and limiting effect of the gears and racks, the angle of the stirring blades is firmly locked to avoid posture deviation, thereby ensuring the scraping effect of the raw material on the tank wall and avoiding residue on the wall.

[0036] The specific operation process of the segmented stirring component 6 in this invention, which performs a single cycle of "forward rotation-reverse rotation-stop rotation", is as follows: The stirring shaft 41 is driven to rotate by the revolution drive component 5, which synchronously drives the rotating top cover 3 to revolve at a uniform speed, thereby driving the first rotating shaft 61 and the matching segmented stirring component 6 to revolve around the central axis of the mixing tank 1. In the initial stage of revolution, the second drive gear 72 first meshes with the second rack 78. Driven by the directional meshing force of the second rack 78, the first rotating shaft 61 rotates clockwise. Then, through the linkage transmission of the universal joint transmission structure, the first stirring blade 62 and the second stirring blade 66 rotate clockwise synchronously, stirring the plastic raw material in the edge area of ​​the mixing tank 1, breaking up the locally accumulated raw material, improving the small-scale mixing effect, and completing the clockwise stirring process in the cycle. As the revolution continues, the second drive gear 72 gradually disengages from the meshing range of the second rack 78. At this time, the first drive gear 71 meshes with the first rack 77, which then drives the first rotating shaft 61 to rotate counterclockwise. The first stirring blade 62 and the second stirring blade 66 simultaneously follow and rotate counterclockwise to reset, continuously reversing the stirring of the edge raw materials to further refine the mixing state of the raw materials until the edge parts of the first stirring blade 62 and the second stirring blade 66 are tightly against the inner wall of the mixing tank 1, completing the reverse stirring process in the cycle. Before the first stirring blade 62 and the second stirring blade 66 come into contact with the tank wall, the pressing cylinder is activated and performs a driving action. Its driving end applies vertical pressure to the pressing ring 723. The pressing ring 723 is pressed down to overcome the elastic force of the internal third spring 724 and continues to press the pressing plate 718 below during the downward movement. The pressing plate 718 is also pressed down to overcome the elastic force of the second spring 719 and moves down synchronously, thereby pushing the pressing ring seat 713 and the lifting bolt 711 to move down synchronously. While the lifting bolt 711 compresses the first spring 712, it drives the bottom friction ring seat 714 to gradually approach and tightly abut against the friction ring strip 715 of the rotating rod 73. (Under normal circumstances, when the first stirring blade 62 and the second stirring blade 66 come into contact with the tank wall, the friction ring seat 714 just touches the tank wall.) The friction ring seat 714 and the friction ring 715 are pressed together, generating a large frictional force. Under the constraint of this frictional force, the friction ring seat 714 and the friction ring 715 revolve synchronously, thereby driving the horizontal ring plate 79, the second connecting ring plate 76, the first connecting ring plate 75, the rotating ring plate 74, and the first rack 77 and the second rack 78 to rotate synchronously with the rotating rod 73. This makes the first rack 77 and the second rack 78, the first drive gear 71, and the second drive gear 72 relatively stationary. The first drive gear 71 and the second drive gear 72 stop rotating. The first stirring blade 62 and the second stirring blade 66 maintain a fixed posture and only revolve with the rotating top cover 3, completing the stop-rotation scraping process in the cycle and achieving stable scraping of the raw materials adhering to the tank wall. After the set duration of the wall scraping operation, the drive end of the pressing cylinder resets and retracts, and the pressing ring 723 and pressing plate 718 are lifted and reset under the action of the corresponding spring force, and the friction ring seat 714 and friction ring bar 715 separate to release the brake.

[0037] In this embodiment, the pressing cylinder adopts a periodic driving mode. The driving interval can be flexibly adjusted during equipment operation according to the actual characteristics of the plastic raw material being mixed and the mixing conditions. This avoids the mixing blades being fixed for a long time to scrape a single area, and achieves full-area scraping of multiple different areas on the inner wall of the mixing tank 1, further improving the anti-wall adhesion effect and the uniformity of raw material mixing.

[0038] To facilitate the feeding process of plastic raw materials, a dedicated feeding port is provided at a preset position on the rotating top cover 3. The size of the feeding port is adapted to the feeding requirements of conventional plastic raw materials, such as... Figure 2 As shown, the feeding port is equipped with a flexible opening and closing sealing plate 13. The sealing plate 13 and the feeding port are assembled in a sealed fit, which can not only ensure the sealing of the tank during the mixing process and prevent dust leakage and raw material spillage, but also enable quick opening and closing to realize the feeding operation. By opening the sealing plate 13, plastic raw materials can be directly put into the mixing tank 1 through the feeding port, simplifying the feeding process and improving the feeding efficiency. In addition, a special climbing ladder is fixedly installed on the outer wall of the mixing tank 1. The ladder body is firmly connected to the outer wall of the mixing tank 1 and is laid out to fit the shape of the tank. Workers can easily climb to the top of the mixing tank 1 through the ladder to carry out various operations such as material loading and inspection, opening and closing of the sealing plate 13, component maintenance, and parameter adjustment.

[0039] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A vertical mixer for plastic processing with anti-wall adhesion, characterized in that, include: A mixing tank (1) with a discharge pipe (2) installed at its bottom; The rotating top cover (3) is movably mounted on the top of the mixing tank (1); The spiral stirring component (4) is installed at the bottom of the rotating top cover (3) and corresponds to the center position inside the stirring tank (1); The revolution drive component (5) is installed outside the mixing tank (1) and is connected to the rotating top cover (3) in a transmission manner. The revolution drive component (5) drives the rotating top cover (3) and the spiral stirring component (4) to rotate synchronously. The segmented stirring component (6) is installed at the bottom of the rotating top cover (3) and corresponds to the position inside the mixing tank (1) near the side wall. The segmented stirring component (6) can follow the rotating top cover (3) to revolve around the central axis of the mixing tank (1). The self-rotating drive (7) is installed on the top of the rotating top cover (3). During each stroke of the segmented stirring component (6) revolving with the rotating top cover (3), the self-rotating drive (7) drives the segmented stirring component (6) to rotate first, and then rotates back to its edge part to abut against the inner wall of the stirring tank (1) and stops rotating. It maintains this state and continues to revolve with the rotating top cover (3) for a period of time.

2. The anti-wall-sticking vertical mixer for plastic processing according to claim 1, characterized in that, The mixing tank (1) is composed of a first tank body (8), a second tank body (9) and a third tank body (10) connected from top to bottom; The first tank (8) and the third tank (10) are both cylindrical tank structures, and the second tank (9) is a conical tank structure; The diameter of the first tank (8) is larger than the diameter of the third tank (10), and the discharge pipe (2) is installed on the side wall of the second tank (9) near the bottom.

3. The anti-wall-sticking vertical mixer for plastic processing according to claim 2, characterized in that, The spiral agitator (4) includes an agitator shaft (41) and spiral blades (42) mounted on the outer wall of the agitator shaft (41). The stirring shaft (41) is fixedly installed on the rotating top cover (3), and the top end of the stirring shaft (41) extends out of the stirring tank (1).

4. The anti-wall-sticking vertical mixer for plastic processing according to claim 3, characterized in that, The revolution drive (5) includes a first mounting base (51) mounted on the rotating top cover (3) and a drive wheel (52) mounted on the top of the stirring shaft (41). The stirring shaft (41) is installed through the first mounting base (51). A fixed base (53) is installed on the top side wall of the stirring tank (1). A drive motor (54) is installed on the fixed base (53). The drive end of the drive motor (54) is connected to a drive wheel (55). The drive wheel (55) and the transmission wheel (52) are connected by a transmission belt (56).

5. The anti-wall-sludge vertical mixer for plastic processing according to claim 4, characterized in that, The mixing tank (1) is equipped with an mounting ring seat (11) on its top, and the rotating top cover (3) is rotatably mounted on the inner circumference of the mounting ring seat (11); A second mounting base (12) is embedded in the vertical direction near the edge of the rotating top cover (3).

6. The anti-wall-sludge vertical mixer for plastic processing according to claim 5, characterized in that, The segmented stirring component (6) includes a first rotating shaft (61) that is mounted through the second mounting base (12), a first stirring blade (62) mounted on the first rotating shaft (61), a first rotating column (63) that is rotatably mounted on the bottom of the first rotating shaft (61), and a second rotating column (64) mounted on the bottom of the first rotating column (63). A second rotating shaft (65) is coaxially mounted on the end of the second rotating column (64). A second stirring blade (66) is mounted on the second rotating shaft (65). A third rotating column (67) is mounted on the end of the second rotating shaft (65) away from the second rotating column (64). A fourth rotating column (68) is mounted on the bottom of the third rotating column (67). The second rotating column (64) and the first rotating column (63), and the third rotating column (67) and the fourth rotating column (68) are rotatably connected by a cross shaft (69). A fixing ring (610) is mounted on the outer wall of the stirring shaft (41). An installation rod (611) is fixed on the outer periphery of the fixing ring (610). A connecting bolt (612) is provided at the end of the installation rod (611) in the vertical direction. The fourth rotating column (68) is rotatably mounted on the connecting bolt (612). The first rotating shaft (61) is parallel to the inner wall of the first tank (8), and the second rotating shaft (65) is located inside the second tank (9) and is parallel to the inside of the second tank (9).

7. The anti-wall-sticking vertical mixer for plastic processing according to claim 6, characterized in that, The self-rotating drive (7) includes a first drive gear (71) and a second drive gear (72) coaxially mounted on the first rotating shaft (61) and a rotating rod (73) mounted between the first rotating shaft (61) and the stirring shaft (41). One end of the rotating rod (73) is fixedly connected to the stirring shaft (41), and the other end is rotatably connected to the first rotating shaft (61). The first driving gear (71) is located below the rotating rod (73), and the second driving gear (72) is located above the rotating rod (73). A rotating ring plate (74) is rotatably mounted on the mounting ring seat (11). A first connecting ring plate (75) is horizontally mounted at the top of the rotating ring plate (74). A second connecting ring plate (76) is vertically mounted at the end of the first connecting ring plate (75). A plurality of first racks (77) are evenly spaced on the inner circumference of the rotating ring plate (74). A plurality of second racks (78) are evenly spaced on the outer circumference of the second connecting ring plate (76). The number of first racks (77) and second racks (78) is the same. During the process of the first drive gear (71) and the second drive gear (72) revolving around the first rotating shaft (61), the second drive gear (72) first meshes with the second rack (78) and drives the first rotating shaft (61) to rotate clockwise. When the second drive gear (72) completely disengages from the second rack (78), the first drive gear (71) meshes with the first rack (77) and drives the first rotating shaft (61) to rotate counterclockwise.

8. The anti-wall-sticking vertical mixer for plastic processing according to claim 7, characterized in that, The second connecting ring plate (76) is connected to a horizontal ring plate (79) on its inner circumference. The horizontal ring plate (79) is provided with a plurality of through slots (710). A lifting bolt (711) is movably arranged in the through slots (710). A first spring (712) is provided between the lifting bolt (711) and the through slot (710). A pressure ring seat (713) is connected to the top of the lifting bolt (711). A friction ring seat (714) is connected to the bottom of the lifting bolt (711). A friction ring bar (715) is provided on the rotating rod (73) at a position opposite to the friction ring seat (714). A through hole (716) is provided through the rotating rod (73), and a movable bolt (717) is movably provided in the through hole (716). A pressing plate (718) is installed on the top of the movable bolt (717), and a second spring (719) is provided on the outer sleeve of the movable bolt (717). One end of the second spring (719) is connected to the pressing plate (718), and the other end is connected to the top of the rotating rod (73). Limit buckles (720) are connected to both ends of the movable bolt (717). The top of the pressing plate (718) is equipped with a connecting ring seat (721). The connecting ring seat (721) is hollow inside and is provided with a pressing ring (723). A third spring (724) is provided at the bottom of the connecting ring seat (721). The end of the third spring (724) is connected to the pressing ring (723). The bottom of the pressing ring (723) passes through the connecting ring seat (721) and is directly opposite the top of the pressing plate (718). The connecting ring seat (721) and the mounting ring seat (11) are fixedly connected by a connecting bracket. A pressing cylinder is installed on the top of the pressing ring (723). The pressing ring (723) is pressed down and applies pressure to the pressing plate (718). The pressing plate (718) is pressed down and pushes the friction ring seat (714) against the friction ring bar (715). The horizontal ring plate (79), the second connecting ring plate (76), the first connecting ring plate (75) and the rotating ring plate (74) revolve synchronously with the rotating rod (73).

9. The anti-wall-sticking vertical mixer for plastic processing according to claim 1, characterized in that, The rotating top cover (3) is provided with a feeding port, and a sealing plate (13) is installed on the feeding port.

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