Efficient homogenizing stirring mechanism and mixing machine applying same

Abstract

The invention relates to the technical field of stirring mechanisms, and discloses an efficient homogenizing stirring mechanism which comprises an outer stirring unit and an inner stirring unit, the outer stirring unit comprises an outer cylinder and a plurality of outer stirring blades distributed on the inner wall of the outer cylinder, and the inner stirring unit comprises a fixed outer pipe and a plurality of inner stirring blades distributed on the fixed outer pipe; the outer cylinder rotates in the horizontal direction, and the inner stirring blades swing in the vertical direction; the inner stirring unit further comprises a driving inner shaft which is arranged in the fixed outer pipe and rotates in the horizontal direction, and a wavy guide groove is formed in the outer wall of the driving inner shaft; the ball socket joint assembly is arranged on the fixed outer pipe and comprises a ball socket base, a ball head and a magnetic attraction limiting ring. The invention further discloses a mixing machine comprising the efficient homogenizing and stirring mechanism. According to the invention, the inner and outer stirring units are adopted, and the outer stirring blades enable materials to circularly flow in a large range in the circumferential direction; and the inner stirring blades continuously perform high-frequency up-and-down insertion in the annular flow to scatter material blocks, so that the stirring efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of stirring mechanism technology, and more specifically, to a high-efficiency homogenizing stirring mechanism and a mixer using the same. Background Technology

[0002] In the processing of polyvinyl chloride (PVC), PVC resin powder needs to be thoroughly mixed with liquid plasticizers and various fillers. Because PVC material is highly abrasive and easily clumps together to form hard agglomerates in the initial stages of mixing, it is essential to develop a dedicated, efficient, homogenizing mixing mechanism. Existing commonly used mixing equipment often employs a rigid, single-track mixing method. This approach not only fails to deeply break up hard material clumps and easily creates mixing dead zones, but also, when the rigid blades directly impact unplasticized hard clumps, the instantaneous overload can easily cause the mixing shaft to twist and break or damage transmission components.

[0003] To improve mixing uniformity, Chinese utility model patent CN212167296U discloses a high-efficiency homogenizing mixer. This technical solution uses a motor located at the center of the top of the tank. A driving gear on the rotating shaft drives the driven gears and stirring mechanism in the two side mixing chambers to rotate, performing an initial mixing of the raw materials. Subsequently, the material falls into the lower part of the tank through a discharge hole on the bottom plate, where it is further mixed by inclined rotating blades.

[0004] However, this technology still has obvious drawbacks when dealing with highly viscous and easily agglomerated materials such as PVC: First, the upper and lower stage mixing is still a rigid, fixed trajectory of rotation and pushing. When facing high-hardness PVC lumps, the reverse resistance can easily cause gear teeth to break or shafts to break. Second, the motor and gear transmission mechanism are suspended on the top of the tank and exposed in the mixing space, which can easily cause transmission blockage.

[0005] Therefore, it is necessary to propose an efficient homogenizing stirring mechanism and a mixer using it, so as to at least partially solve the problems existing in the prior art. Summary of the Invention

[0006] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a high-efficiency homogenizing stirring mechanism, comprising: an outer stirring unit and an inner stirring unit. The outer stirring unit includes an outer cylinder and a plurality of outer stirring blades distributed on the inner wall of the outer cylinder. The inner stirring unit includes a fixed outer tube and a plurality of inner stirring blades distributed on the fixed outer tube. The outer cylinder rotates in the horizontal direction, and the inner stirring blades swing in the vertical direction. The internal stirring unit also includes: a drive inner shaft that is set inside the fixed outer tube and rotates in the horizontal direction, and the outer wall of the drive inner shaft is provided with a wave-shaped guide groove, and a guide ball is adapted in the guide groove; The ball-and-socket joint assembly is mounted on a fixed outer tube and includes a ball-and-socket base, a ball head rotatably disposed within the ball-and-socket base, and a magnetic retaining ring that restricts the ball head from detaching. When the magnetic retaining ring is subjected to a load exceeding a set threshold, the magnetic retaining ring overcomes the magnetic force and slides relative to the ball-and-socket base to avoid it. One end of the ball head is connected to the inner stirring blade, and the other end extends inward and is connected to the guide ball.

[0008] Preferably, a concealed locking component is provided between the inner stirring blade and the ball head. The concealed locking component is configured to be unlocked under external triggering and to provide elastic restoring force to lock the inner stirring blade to the ball head under normal conditions.

[0009] Preferably, the inner side of the ball head is connected to the guide ball via an elastic telescopic rod, and the guide ball remains in close contact with its inner wall as it moves along the guide groove. The inner side of the ball socket base is provided with a through groove for the elastic telescopic rod to rotate horizontally.

[0010] Preferably, the outer end face of the ball socket base is provided with a limiting groove in the horizontal direction, the magnetic limiting ring is slidably connected in the limiting groove and does not detach, and a spring is connected between the magnetic limiting ring and the end of the limiting groove; the ball socket base is provided with a first magnetic element, the magnetic limiting ring is provided with a second magnetic element, and the first magnetic element and the second magnetic element are magnetically attracted to each other; the first magnetic element and the second magnetic element are made of high temperature resistant magnetic material.

[0011] Preferably, the magnetic retaining ring includes a first annular portion located on the outer side and a second annular portion located on the inner side. The inner diameter of the first annular portion is smaller than the diameter of the ball head, and the inner diameter of the second annular portion is larger than the diameter of the ball head. The end of the first annular portion is located outside the central axis of the ball head, and the first annular portion is in contact with the ball head.

[0012] Preferably, the ball-and-socket joint assembly further includes a protective seat fitted on the outside of the ball-and-socket base, the protective seat being installed on the fixed outer tube and a sealing ring being provided between the two; the protective seat is provided with a through groove for the elastic telescopic rod to rotate horizontally.

[0013] Preferably, the outer wall of the ball socket base is provided with an annular air guide groove, and multiple air vents are provided through the protective seat. The air vents are connected to the inside of the fixed outer tube, and a cooling jacket is formed between the fixed outer tube and the drive inner shaft, and is connected to the heat exchange equipment through pipelines.

[0014] Preferably, the present invention provides a mixer, including the high-efficiency homogenizing stirring mechanism and a drive unit, wherein the output end of the drive unit is connected to both the outer cylinder and the inner drive shaft, and the drive unit is independently disposed at the bottom of the machine body.

[0015] Preferably, the feeding pipe passes through the top of the machine body and is rotatably connected to the outer cylinder. The inner wall of the machine body is provided with a rotating support ring to support the outer cylinder. A fixed base plate is provided at the center of the bottom of the outer cylinder. The outer cylinder rotates relative to the fixed base plate. The fixed outer pipe and the drive inner shaft are installed at the center of the fixed base plate. The discharge pipe is provided on the fixed base plate.

[0016] Preferably, the drive unit includes: The drive motor is installed at the bottom of the machine body, and its output shaft is connected to the inner drive shaft; The drive gear is connected to the output shaft of the drive motor; Driven gears are mounted between the machine body and the fixed base plate via gear shafts, and multiple driven gears mesh with the driving gears simultaneously. The drive gear ring is connected to the bottom of the outer cylinder, and its inner wall is simultaneously engaged with multiple driven gears through snap teeth.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: This invention provides a high-efficiency homogenizing stirring mechanism and a mixer using it. It employs internal and external dual stirring units to construct a combined horizontal tangential flow and vertical axial flow mixing flow field. The horizontally rotating external stirring blades induce a large-scale circumferential circulation of the material; the vertically oscillating internal stirring blades continuously perform high-frequency up-and-down movements within this circumferential flow, breaking up material clumps and improving stirring efficiency. In complex mixing conditions, a magnetic retaining ring combined with a ball-and-socket joint assembly allows for instantaneous compliant deflection of the internal stirring blades. This reduces mechanical damage to the core transmission components, ensures the continuous operation of the overall equipment, and maintains high operational reliability within the mixing chamber.

[0018] By maximizing the mixing space within the machine body and utilizing a highly efficient homogenizing stirring mechanism to improve the mixing efficiency within a single mixing space, the risk of material damage and blockage is reduced compared to mechanisms with multiple mixing chambers.

[0019] The present invention provides a high-efficiency homogenizing stirring mechanism and a mixer using the same. Other advantages, objectives and features of the present invention will be apparent in part from the following description, and in part from the understanding of those skilled in the art through study and practice of the invention. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a high-efficiency homogenizing stirring mechanism of the present invention; Figure 2 This is a schematic cross-sectional view of the ball-and-socket joint assembly in the present invention along the horizontal direction; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point B; Figure 5 This is a schematic diagram of the internal structure of the mixer in this invention; Figure 6 This is a cross-sectional structural diagram of the mixer in this invention.

[0021] In the diagram: 1. Machine body; 2. Feeding pipe; 3. Rotating support ring; 4. Fixed base plate; 5. Discharge pipe; 6. Drive motor; 7. Driving gear; 8. Driven gear; 9. Gear shaft; 10. Drive gear ring; 11. Outer cylinder; 12. Outer stirring blade; 21. Fixed outer pipe; 22. Inner stirring blade; 23. Drive inner shaft; 24. Guide groove; 25. Guide ball; 26. Ball socket base; 27. Ball head; 28. Magnetic limit ring; 29. ​​Elastic telescopic rod; 31. Limiting slide groove; 32. First magnetic component; 33. Second magnetic component; 34. Spring; 35. First annular part; 36. Second annular part; 41. Protective seat; 42. Sealing ring; 43. Annular air guide groove; 44. Vent hole. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0023] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0024] Example 1: As Figures 1-4 As shown, the present invention provides a high-efficiency homogenizing stirring mechanism, comprising: A high-efficiency homogenizing stirring mechanism, characterized in that it comprises: The outer stirring unit includes an outer cylinder 11 and a plurality of outer stirring blades 12 distributed on the inner wall of the outer cylinder 11. The inner stirring unit includes a fixed outer tube 21 and a plurality of inner stirring blades 22 distributed on the fixed outer tube 21. The outer cylinder 11 rotates in the horizontal direction and the inner stirring blades 22 swing in the vertical direction. The internal stirring unit also includes: The drive inner shaft 23 is located inside the fixed outer tube 21 and rotates in the horizontal direction. The outer wall of the drive inner shaft 23 is provided with a wave-shaped guide groove 24, and a guide ball 25 is adapted in the guide groove 24. The ball-and-socket joint assembly is mounted on the fixed outer tube 21 and includes a ball-and-socket base 26, a ball head 27 that is rotatably mounted in the ball-and-socket base, and a magnetic retaining ring 28 that restricts the ball head 27 from detaching. When the magnetic retaining ring 28 is subjected to a load exceeding a set threshold, the magnetic retaining ring 28 overcomes the magnetic force and slides away from the ball-and-socket base 26. One end of the ball head 27 is connected to the inner stirring blade 22, and the other end extends inward and is connected to the guide ball 25.

[0025] The working principle and beneficial effects of the above technical solution are as follows: This invention provides a highly efficient homogenizing stirring mechanism. After the power source is started, the inner shaft 23 rotates at a constant speed horizontally at its axial position. Accompanying the rotation of the inner shaft 23, the wavy guide groove 24 on its outer wall simultaneously generates rotational displacement. Because the guide groove 24 has a continuous undulating profile along the axial direction, the guide ball 25 placed inside the guide groove 24, under the pushing action of the groove wall, generates a reciprocating linear displacement parallel to the axis of the inner shaft 23, i.e., a lever-like pitching motion within a single vertical section. The linear displacement of the guide ball 25 is then transmitted outwards, driving the inner end of the ball head 27 connected to it. After being subjected to force, the ball head 27 generates a lever-like rotational motion with the ball socket base 26 as the support center. During the rotation of the ball head 27, the end of the ball head 27 located outside the ball socket drives the inner stirring blade 22 to regularly oscillate up and down in the vertical direction. While the inner stirring blade 22 swings vertically, the outer cylinder 11 rotates continuously in the horizontal direction under the drive of its peripheral drive structure, and the outer stirring blade 12 fixed to the inner wall of the outer cylinder 11 moves in a horizontal circular motion.

[0026] When the inner stirring blade 22 collides with an incompletely crushed hard material clump during its oscillation, the resistance force at its end surges instantaneously. This resistance force, acting as a reverse torque, is transmitted back to the ball head 27, forcing the middle of the ball head 27 to forcefully press the magnetic retaining ring 28 outward. When this pressing force exceeds the magnetic attraction limit (i.e., the set threshold) of the magnetic retaining ring 28 itself, the magnetic retaining ring 28 directly overcomes the magnetic constraint and undergoes lateral displacement relative to the ball base 26 to avoid it. The avoidance action of the magnetic retaining ring 28 immediately releases the rigid obstruction to the periphery of the ball head 27, causing the inner stirring blade 22, along with the ball head 27, to deflect in the direction of material resistance, completing an instantaneous stress release. After the local high-resistance area moves away with the rotation of the outer cylinder 11, the magnetic force recaptures and attracts the magnetic retaining ring 28, pulling it back to its initial position, and the inner stirring blade 22 then resumes its predetermined vertical oscillation trajectory. Optionally, a protective membrane is connected between the ball head 27 and the fixed outer tube 21, which neither affects the rotation of the ball head nor prevents materials from entering.

[0027] Through the above structural design, this embodiment employs internal and external dual stirring units to construct a combined horizontal tangential flow and vertical axial flow stirring flow field. The horizontally rotating external stirring blade 12 causes the material to circulate within a large circumferential range; the vertically oscillating internal stirring blade 22 continuously performs high-frequency up-and-down insertion within the aforementioned circumferential flow, breaking up material clumps and improving stirring efficiency. When facing complex mixing conditions, the magnetic retaining ring 28 is used in combination with the ball-and-socket joint assembly, allowing the internal stirring blade 22 to undergo instantaneous compliant deflection. This reduces mechanical damage to the core transmission components, ensures the continuous operation of the overall equipment, and maintains high operational reliability within the mixing chamber.

[0028] Example 2: Based on Example 1 above, a hidden locking component is provided between the inner stirring blade 22 and the ball head 27. The hidden locking component is configured to be unlocked under external triggering and to provide elastic restoring force under normal conditions to lock the inner stirring blade 22 onto the ball head 27.

[0029] The working principle and beneficial effects of the above technical solution are as follows: As an optional embodiment of the concealed locking assembly, the ball head 27 has a transverse guide blind hole inside, in which a return spring and a locking pin pushed by the return spring are installed. The end of the connecting handle of the inner stirring blade 22 is provided with a recessed self-locking groove that perfectly matches the shape of the locking pin. Under normal conditions without external physical intervention, the return spring releases its elastic potential energy, continuously pushing the locking pin outward from the hole, and the locking pin is tightly engaged in the recessed self-locking groove on the connecting handle, locking the inner stirring blade 22 into the insertion hole of the ball head 27. During disassembly, a slender, rigid unlocking rod is inserted through a pre-drilled process hole on the side of the inner stirring blade 22, overcoming the repulsive force of the return spring, and pushing the locking pin outward from the depth of the blind hole, completely disengaging the locking pin from the recessed self-locking groove. Then, a pulling force is applied outward along the axial direction of the inner stirring blade 22 to pull the inner stirring blade 22 out of the ball head 27. During normal use, the perforation in the process is sealed with a sealing plug.

[0030] The concealed locking assembly adopts a direct-insertion engagement mechanism with an embedded spring pin and a self-locking slot. This not only completely encloses the fasteners within the metal housing, eliminating the risk of conventional exposed bolts being severely worn or even jammed by the high-hardness PVC filler, but also avoids serious production accidents caused by fasteners loosening and falling into the mixing chamber due to high-speed material scouring.

[0031] Example 3: Based on Example 1 above, the inner side of the ball head 27 is connected to the guide ball 25 through the elastic telescopic rod 29. When the guide ball 25 moves along the guide groove 24, it is always in close contact with its inner wall. The inner side of the ball socket base 26 is provided with a through groove for the elastic telescopic rod 29 to rotate horizontally.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The elastic telescopic rod 29, connecting the inner side of the ball head 27 and the guide ball 25, has an energy-storing compression spring installed inside its outer sleeve. When the guide ball 25 deflects vertically due to the undulations within the wavy guide groove 24, the elastic telescopic rod 29 extends and retracts to compensate for its length, adapting to the movement trajectory of the guide ball 25. This ensures that the guide ball 25 remains firmly attached to the guide groove 24, guaranteeing effective deflection drive for the ball head 27 and eliminating the risk of rod breakage due to component interference.

[0033] Example 4: Based on Example 1 above, a limiting groove 31 is provided on the outer end face of the ball socket base 26 in the horizontal direction. The magnetic limiting ring 28 is slidably connected in the limiting groove 31 and does not detach. A spring 34 is connected between the magnetic limiting ring 28 and the end of the limiting groove 31. A first magnetic element 32 is provided on the ball socket base 26, and a second magnetic element 33 is provided on the magnetic limiting ring 28. The first magnetic element 32 and the second magnetic element 33 are magnetically attracted to each other. The first magnetic element 32 and the second magnetic element 33 are made of high temperature resistant magnetic material.

[0034] The magnetic retaining ring 28 includes a first annular portion 35 located on the outer side and a second annular portion 36 located on the inner side. The inner diameter of the first annular portion 35 is smaller than the diameter of the ball head 27, and the inner diameter of the second annular portion 36 is larger than the diameter of the ball head 27. The end of the first annular portion 35 is located outside the central axis of the ball head 27, and the first annular portion 35 is in contact with the ball head 27.

[0035] The working principle and beneficial effects of the above technical solution are as follows: When the inner stirring blade 22 impacts the hard, unplasticized PVC lump during mixing, the reverse resisting torque is transmitted inward to the ball head 27. The convex spherical area in the middle of the ball head 27 forcefully presses the inner wall of the magnetic retaining ring 28 outward. When this pressing force exceeds the predetermined magnetic attraction limit between the first magnetic element 32 on the ball base 26 and the second magnetic element 33 on the magnetic retaining ring 28, the magnetic retaining ring 28 overcomes the magnetic force and rotates and slides outward along the horizontally oriented limiting groove 31 opened on the outer end face of the ball base 26. During the rotation and sliding process, the magnetic retaining ring 28 on the other side continuously pushes and compresses the spring 34 to accumulate potential energy. As the magnetic retaining ring 28 slides and shifts, the first annular portion 35, which was originally in close contact with the ball head 27, moves away. The ball head 27 loses the rigid physical resistance of the first annular portion 35 and deflects in the direction of the PVC block's push within the clearance space reserved by the second annular portion 36. After the PVC block moves away with the outer cylinder 11, the external reverse torque pushing the ball head 27 dissipates, the spring 34 releases its compressive potential energy, and pushes the magnetic retaining ring 28 inward along the limiting groove 31 back to its initial position. The first annular portion 35 re-locks the ball head 27, and the first magnetic component 32 and the second magnetic component 33 re-attract and lock together. A limiting stop structure can be provided on the limiting groove 31 to limit the movement distance of the magnetic retaining ring 28.

[0036] At the instant the ball head 27 deflects laterally, the guide ball 25 connected to its inner end simultaneously generates a reverse lateral displacement based on the ball's center fulcrum. Since the wavy guide groove 24 extends circumferentially around the outer cylindrical surface of the inner drive shaft 23, this lateral displacement of the guide ball 25 is directly converted into tangential sliding along the circumferential trajectory of the guide groove 24, thereby absorbing the geometric phase difference between the inner and outer movements and avoiding physical interference between components. In this fit, the radial physical depth of the wavy guide groove 24 is set to be greater than the maximum radial retraction of the guide ball 25 at the extreme lateral swing angle, ensuring that the guide ball 25 is always deeply embedded inside the guide groove 24 during lateral unloading sliding, preventing derailment and jamming.

[0037] Through the above structural design, the magnetic retaining ring 28 adopts a non-uniform diameter stepped inner hole configuration of the first annular portion 35 and the second annular portion 36, giving it two spatial states: rigid locking and clearance release. When the first annular portion 35 is engaged, the movement of the inner stirring blade 22 is constrained within a set single vertical section, performing precise shearing. After overload causes the magnetic retaining ring 28 to slip, the expanded space of the second annular portion 36 allows the ball head 27 to deflect, and the deflection angle is limited by the limiting groove 31 and the spring 34. This fully ensures that the inner stirring blade 22 can flexibly slide over the hard PVC block to complete instantaneous mechanical unloading and fracture protection, while strictly preventing interference and collision between the inner stirring blade 22 and the fixed outer tube 21 or adjacent blades after excessive deflection.

[0038] Example 5: Based on Example 4 above, the ball-and-socket joint assembly further includes a protective seat 41 sleeved on the outside of the ball-and-socket base 26. The protective seat 41 is installed on the fixed outer tube 21 and a sealing ring 42 is provided between the two. The protective seat 41 is provided with a through groove for the elastic telescopic rod 29 to rotate horizontally.

[0039] The outer wall of the ball socket base 26 is provided with an annular air guide groove 43, and multiple air vents 44 are provided through the protective seat 41. The air vents 44 are connected to the inside of the fixed outer tube 21. A cooling jacket is formed between the fixed outer tube 21 and the drive inner shaft 23, and is connected to the heat exchange equipment through the pipeline.

[0040] The working principle and beneficial effects of the above technical solution are as follows: The protective seat 41 is installed on the outer wall of the fixed outer tube 21, completely enclosing the entire ball-and-socket base 26 from the outside in. A sealing ring 42, sandwiched between the protective seat 41 and the fixed outer tube 21, fills the gap between their contact surfaces. An external heat exchanger continuously pressurizes low-temperature gas into the sealed cooling jacket formed between the fixed outer tube 21 and the drive inner shaft 23 through a circulation pipeline. The low-temperature gas circulates unidirectionally within the jacket pipeline, carrying away the heat energy from the drive inner shaft 23 and the fixed outer tube 21, keeping the fixed outer tube 21 at a low temperature. The reciprocating friction of the metal components inside the ball-and-socket base 26 causes the structural components to heat up. Some of the low-temperature gas passes through the vent 44 and enters the pre-drilled annular air guide groove 43 on the outer wall of the ball socket base 26. Some of the low-temperature gas passes through the groove and contacts the outer wall of the ball socket base 26, thereby reducing the overall temperature of the ball socket joint assembly. The heated gas flows back into the heat exchange equipment for cooling circulation, which improves the reliability of the transmission components in high-temperature environments and prevents the heat-sensitive PVC material at the contact points from charring, blackening, or severe thermal degradation due to localized continuous overheating.

[0041] Example 6: As Figure 5 , Figure 6As shown, based on any one of the above embodiments 1-5, this embodiment provides a mixer, including the high-efficiency homogenizing stirring mechanism and the drive unit. The output end of the drive unit is connected to both the outer cylinder 11 and the drive inner shaft 23. The drive unit is independently located at the bottom of the machine body 1.

[0042] The working principle and beneficial effects of the above technical solution are as follows: The core heavy-duty drive unit is independently and centrally deployed at the bottom of the machine body 1, achieving a stable distribution of the machine's geometric center. Independent placement of the drive unit effectively avoids the drawbacks of exposed transmission components in the mixing chamber, which are prone to blockage and affect the mixing space. The transmission space above the equipment, previously occupied by the motor, is completely cleared and freed up, greatly facilitating the connection and installation of multiple sets of PVC material feeding pipelines with different proportions, automatic metering and weighing devices, and exhaust and dust removal pipelines at the top of the machine body 1. The mixing space within the machine body 1 is maximized, and a highly efficient homogenizing stirring mechanism improves the mixing efficiency within a single mixing space, reducing the risk of material damage and blockage compared to mechanisms with multiple mixing chambers.

[0043] Example 7: Based on Example 6 above, the feeding pipe 2 passes through the top of the machine body 1 and is rotatably connected to the outer cylinder 11. The inner wall of the machine body 1 is provided with a rotating support ring 3 to support the outer cylinder 11. A fixed base plate 4 is provided at the bottom center of the outer cylinder 11. The outer cylinder 11 rotates relative to the fixed base plate 4. The fixed outer pipe 21 and the drive inner shaft 23 are installed at the center of the fixed base plate 4. The discharge pipe 5 is provided on the fixed base plate 4.

[0044] The drive unit includes: The drive motor 6 is installed at the bottom of the machine body 1, and its output shaft is connected to the drive inner shaft 23; The drive gear 7 is connected to the output shaft of the drive motor 6; Driven gear 8 is installed between body 1 and fixed base plate 4 via gear shaft 9, and multiple driven gears 8 mesh with driving gear 7 at the same time; The drive gear ring 10 is connected to the bottom end of the outer cylinder 11, and its inner wall is simultaneously engaged with multiple driven gears 8 through snap teeth.

[0045] The working principle and beneficial effects of the above technical solution are as follows: PVC resin granules and various functional liquid additives located in the feeding pipe network above the equipment fall downwards under gravity, dropping through the feeding pipe 2 that penetrates the top cover of the machine body 1 and sinking into the cavity at the bottom of the outer cylinder 11. The bottom-mounted drive motor 6 starts running, driving the inner drive shaft 23 to rotate. The drive gear 7, mounted in the middle of the output shaft of the drive motor 6, rotates synchronously with the main shaft. The circumferential tangential thrust applied by the drive gear 7 continuously drives all the driven gears 8 around their respective gear shafts 9 to rotate. The driven gears 8 mesh with the teeth fixed on the inner side wall of the drive gear ring 10, causing the drive gear ring 10 to rotate. The bottom end of the outer cylinder 11 is connected to the top end of the drive gear ring 10, causing the outer cylinder 11 to rotate as a whole, and to roll and slide in a supported manner on the inner ring surface of the rotating support ring 3 at the bottom of the outer side, maintaining rotation with the fixed base plate 4 as the center. The uniform PVC liquid, which has been mixed and plasticized inside the outer cylinder 11, flows down the discharge slope into the discharge pipe 5 and is discharged into the outside of the machine body in a centralized sinking manner.

[0046] Through the above structural design, the high-speed, low-torque state of the drive motor 6 is converted into a stable, low-speed thrust on the outer cylinder 11 of the PVC mixture, while simultaneously driving the inner and outer mixing units. This concentric bidirectional power speed-changing output structure, compared with the traditional dual-drive equipment, reduces the control difficulty and space occupation. All exposed and lubricated transmission structures are arranged in the isolation space below the fixed base plate 4, expanding the actual effective physical loading volume of the core working cavity above the machine, and greatly simplifying the daily mechanical maintenance and lubrication process.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high-efficiency homogenizing stirring mechanism, characterized in that, include: The outer stirring unit includes an outer cylinder (11) and a number of outer stirring blades (12) distributed on the inner wall of the outer cylinder (11). The inner stirring unit includes a fixed outer tube (21) and a number of inner stirring blades (22) distributed on the fixed outer tube (21). The outer cylinder (11) rotates in the horizontal direction and the inner stirring blades (22) swing in the vertical direction. The internal stirring unit also includes: The drive inner shaft (23) is set inside the fixed outer tube (21) and rotates in the horizontal direction. The outer wall of the drive inner shaft (23) is provided with a wave-shaped guide groove (24), and a guide ball (25) is adapted in the guide groove (24). The ball joint assembly is mounted on the fixed outer tube (21) and includes a ball base (26), a ball head (27) that is rotatably mounted in the ball base (26), and a magnetic retaining ring (28) that restricts the ball head (27) from detaching. When the magnetic retaining ring (28) is subjected to a load exceeding a set threshold, the magnetic retaining ring (28) overcomes the magnetic force and slides away from the ball base (26). One end of the ball head (27) is connected to the inner stirring blade (22), and the other end extends inward and is connected to the guide ball (25).

2. The high-efficiency homogenizing stirring mechanism according to claim 1, characterized in that, A concealed locking assembly is provided between the inner stirring blade (22) and the ball head (27). The concealed locking assembly is configured to be unlocked under external triggering and to provide elastic restoring force under normal conditions to lock the inner stirring blade (22) onto the ball head (27).

3. The high-efficiency homogenizing stirring mechanism according to claim 1, characterized in that, The inner side of the ball head (27) is connected to the guide ball (25) through the elastic telescopic rod (29). When the guide ball (25) moves along the guide groove (24), it is always in close contact with its inner wall. The inner side of the ball socket base (26) is provided with a through groove for the elastic telescopic rod (29) to rotate horizontally.

4. The high-efficiency homogenizing stirring mechanism according to claim 1, characterized in that, The outer end face of the ball socket base (26) is provided with a limiting groove (31) in the horizontal direction. The magnetic limiting ring (28) is slidably connected in the limiting groove (31) and does not detach. A spring (34) is connected between the magnetic limiting ring (28) and the end of the limiting groove (31). The ball socket base (26) is provided with a first magnetic element (32), and the magnetic limiting ring (28) is provided with a second magnetic element (33). The first magnetic element (32) and the second magnetic element (33) are magnetically attracted to each other. The first magnetic element (32) and the second magnetic element (33) are made of high temperature resistant magnetic material.

5. The high-efficiency homogenizing stirring mechanism according to claim 4, characterized in that, The magnetic retaining ring (28) includes a first annular portion (35) located on the outer side and a second annular portion (36) located on the inner side. The inner diameter of the first annular portion (35) is smaller than the diameter of the ball head (27), and the inner diameter of the second annular portion (36) is larger than the diameter of the ball head (27). The end of the first annular portion (35) is located outside the central axis of the ball head (27), and the first annular portion (35) is in contact with the ball head (27).

6. The high-efficiency homogenizing stirring mechanism according to claim 3, characterized in that, The ball-and-socket joint assembly also includes a protective seat (41) fitted on the outside of the ball-and-socket base (26). The protective seat (41) is installed on the fixed outer tube (21) and a sealing ring (42) is provided between the two. The protective seat (41) is provided with a through groove for the elastic telescopic rod (29) to rotate horizontally.

7. The high-efficiency homogenizing stirring mechanism according to claim 6, characterized in that, The outer wall of the ball socket base (26) is provided with an annular air guide groove (43), and multiple air vents (44) are provided through the protective seat (41). The air vents (44) are connected to the inside of the fixed outer tube (21). A cooling jacket is formed between the fixed outer tube (21) and the drive inner shaft (23), and is connected to the heat exchange equipment through the pipeline.

8. A mixer, characterized in that, Includes a high-efficiency homogenizing stirring mechanism and a drive unit as described in any one of claims 1 to 7, wherein the output end of the drive unit is connected to both the outer cylinder (11) and the drive inner shaft (23), and the drive unit is independently located at the bottom of the body (1).

9. A mixer according to claim 8, characterized in that, The feeding pipe (2) passes through the top of the machine body (1) and is rotatably connected to the outer cylinder (11). The inner wall of the machine body (1) is provided with a rotating support ring (3) to support the outer cylinder (11). A fixed base plate (4) is provided at the center of the bottom of the outer cylinder (11). The outer cylinder (11) rotates relative to the fixed base plate (4). The fixed outer pipe (21) and the drive inner shaft (23) are installed at the center of the fixed base plate (4). The discharge pipe (5) is provided on the fixed base plate (4).

10. A mixer according to claim 9, characterized in that, The drive unit includes: The drive motor (6) is installed at the bottom of the machine body (1), and its output shaft is connected to the drive inner shaft (23); The drive gear (7) is connected to the output shaft of the drive motor (6); Driven gears (8) are installed between the machine body (1) and the fixed base plate (4) via gear shaft (9), and multiple driven gears (8) mesh with the driving gear (7) at the same time; The drive gear ring (10) is connected to the bottom end of the outer cylinder (11), and its inner wall is simultaneously engaged with multiple driven gears (8) through the snap teeth.

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