Multi-stage gradient cleaning treatment equipment for waste PET bottle piece recycling

Abstract

The application relates to the technical field of PET bottle piece disinfection, in particular to a multistage gradient cleaning treatment equipment for waste PET bottle piece recycling, which comprises a rotary workbench, cleaning chambers, a rubbing mechanism and a driving mechanism; the rotary workbench is provided with a rotatable rotary table, a fixed base is arranged at the center of the rotary workbench, and at least three inclined protrusions are arranged on the fixed base; the cleaning chambers are arranged at least in three, support columns are fixed on the rotary table, the cleaning chambers are rotationally assembled on the corresponding support columns, and lower rubbing plates and upper rubbing plates are arranged in the cleaning chambers; the rubbing mechanism comprises a rotary driving assembly and an elastic connecting assembly; the rotary driving assembly comprises a supporting rod and a roller; the roller can slide with the inclined protrusions in cooperation with the rotation of the rotary table. The application realizes the function of the lower rubbing plate and the upper rubbing plate in rubbing and rubbing the bottle pieces, and solves the technical problem that the traditional PET bottle pieces are rubbed only on one side, so that the bottle piece surface is left with adhering substances.

Description

Technical Field

[0001] This invention relates to the field of PET bottle flake sterilization technology, specifically to a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes. Background Technology

[0002] During the recycling and processing of waste PET bottle flakes, various impurities such as mud, glue stains, and label residue easily adhere to the surface of the flakes. These impurities are firmly attached and it is difficult to completely remove them by simply soaking them in water. The rubbing and washing process is a key step to ensure the cleanliness of the bottle flakes and meet the standards for subsequent regranulation processing. Currently, the industry generally relies on specialized cleaning equipment to complete the rubbing and washing of bottle flakes to remove impurities.

[0003] To this end, Chinese Patent No. CN120552253B discloses a PET bottle flake disinfection and washing device and its usage method. By setting a rubbing mechanism, a pushing mechanism and a rinsing mechanism on the top of the base, the device can intermittently lay out and rub the bottle flakes in batches through the rubbing mechanism, the pushing mechanism and the rinsing mechanism, thereby breaking the adhesion of the adhesive to the bottle flakes, and powerfully rinsing the bottle flakes to remove the residues attached to the surface of the bottle flakes. At the same time, it assists the internal liquid flow of the drift pool to improve the fluidity of the bottle flakes.

[0004] However, the existing equipment has a fixed washing surface position, allowing only single-sided washing. Bottle flakes randomly tumble and reposition themselves within the washing chamber due to water flow, lacking external force for control. Many flakes only have one side of their outer wall in contact with the washing surface, leaving the other side with residual adhesive and stains difficult to remove effectively, resulting in inconsistent cleanliness of the finished product. Furthermore, each functional mechanism within the device, such as washing and flow control, is driven by a separate power source. The machine contains numerous driving components, and the humid washing environment accelerates corrosion and wear of these electrical parts. This not only increases manufacturing costs and daily maintenance expenses but also further raises the probability of equipment failure due to the simultaneous operation of multiple components. The single-sided washing mode's inability to comprehensively remove residue from bottle flakes and the high cost and failure rate caused by separate, independent drives have long hindered the practical implementation of refined cleaning and processing of PET bottle flakes. Summary of the Invention

[0005] To address the aforementioned issues, a multi-stage gradient cleaning and processing device for recycling waste PET bottle flakes is provided. This device solves the technical problem of residual adhesive residue on the surface of PET bottle flakes caused by traditional single-sided rubbing of PET bottle flakes through inclined protrusions, rollers, support rods, and elastic connecting components.

[0006] To address the problems of existing technologies, this invention provides a multi-stage gradient cleaning and processing device for recycling waste PET bottle flakes, comprising a rotating worktable, cleaning chambers, a scrubbing mechanism, and a driving mechanism; the rotating worktable is equipped with a revolving rotating platform and a rotary driver for driving the rotating platform to rotate, and a fixed base is set at the center of the rotating worktable, with at least three oblique protrusions on the fixed base; at least three cleaning chambers are provided, and support columns are fixed on the rotating platform, with each cleaning chamber rotatably mounted on a corresponding support column, and a lower scrubbing mechanism is provided inside the cleaning chamber. The washing plate and the upper scrubbing plate; the scrubbing mechanism includes a rotary drive assembly and an elastic connection assembly. The rotary drive assembly includes a support rod disposed at the bottom of the cleaning chamber and a roller rotatably sleeved on the support rod. The roller can slide and cooperate with the inclined protrusion as the rotating table revolves. The drive mechanism is used to drive the upper scrubbing plate to perform lifting and rotating movements. When the rotating table revolves and drives the roller to slide along the inclined protrusion, the inclined protrusion pushes the cleaning chamber to deflect via the roller. After the roller disengages from the inclined protrusion, the cleaning chamber resets under the elastic force of the elastic connection assembly and drives the lower scrubbing plate to swing.

[0007] Preferably, the elastic connection assembly includes a connecting ring, an extension rod, a vertical plate, and a first elastic damping rod; the connecting ring is fixedly sleeved on the support column, the extension rod and the connecting ring are fixedly connected, the vertical plate is fixedly installed at the bottom of the cleaning chamber, and the two ends of the first elastic damping rod are respectively hinged and assembled between the extension rod and the vertical plate. After the cleaning chamber is pushed and deflected by the inclined protrusion, it can complete the rotation and reset with the damping force of the first elastic damping rod.

[0008] Preferably, the cleaning chamber is further provided with an auxiliary control mechanism, which includes a buffer assembly, the buffer assembly including a slide and a second elastic damping rod; the bottom of the cleaning chamber is provided with a radially extending groove, the slide is slidably assembled inside the groove, and the support rod is fixed on the slide; the second elastic damping rod is arranged in the groove and connected to the slide, and the slide can elastically slide along the groove by relying on the second elastic damping rod.

[0009] Preferably, the auxiliary control mechanism further includes a pressurizing component for driving the lower scrubbing plate to rise; the pressurizing component is connected to the slide block in a transmission manner, and during the process of the slide block sliding towards the axis of the cleaning chamber to compress the second elastic damping rod, the slide block is linked with the pressurizing component to raise the lower scrubbing plate.

[0010] Preferably, the pressurization assembly includes a first support frame and a first guide rod; the first support frame is arranged inside the cleaning chamber, and there are at least two first guide rods. The first guide rods are fixedly connected to the first support frame. The cleaning chamber has guide grooves that correspond one-to-one with the first guide rods. Each first guide rod is slidably assembled with its corresponding guide groove. The first support frame slides with the first guide rods to achieve lifting and lowering and to support the scrubbing plate.

[0011] Preferably, the pressurization assembly further includes an elastic sealing membrane that is sealed to the inner wall of the cleaning chamber, the elastic sealing membrane being disposed between the first support frame and the lower scrubbing plate.

[0012] Preferably, a wedge is fixedly connected to the slide block, and during the movement of the slide block towards the axis of the cleaning chamber, the wedge block squeezes the first support frame and lifts the first support frame.

[0013] Preferably, the driving mechanism includes a second support frame and a rotating bracket; the second support frame is fixedly mounted on the rotary table, and a second guide rod is fixedly mounted on the second support frame; the rotating bracket and the second guide rod are slidably engaged; the upper scrubbing plate is coaxially fixedly connected to a connecting shaft, the rotating bracket is rotatably connected to the connecting shaft, and the fixed base is equipped with a linear actuator for driving the rotating bracket to rise and fall; when the linear actuator drives the rotating bracket to rise, it drives the connecting shaft to rise synchronously.

[0014] Preferably, a secondary support is fixedly mounted on the second support frame, and a transmission gear is rotatably mounted on the secondary support. The transmission gear is slidably sleeved on the outside of the connecting shaft, and the two achieve circumferential transmission through an axial keyway and a flat key. The rotation of the transmission gear can drive the connecting shaft to rotate synchronously. A toothed ring that meshes with the transmission gear is fixedly mounted on the fixed base.

[0015] Preferably, the inclined protrusion is equipped with a cover plate and bolts, and the fixed base has at least three mounting slots for accommodating the inclined protrusion. The inclined protrusion is embedded in the mounting slot and locked to the fixed base by the cover plate and bolts.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention utilizes inclined protrusions, rollers, support rods, and elastic connecting components to achieve the function of coordinating the lower and upper washing plates to rub bottle flakes. This achieves intermittent reciprocating gradient washing and removes adhering debris from the bottle flake surface, solving the technical problem of residual adhesive residue on the bottle flake surface caused by traditional PET bottle flake washing which only washes one side. Compared to existing technologies, this invention relies entirely on existing components to achieve the reciprocating washing action, eliminating the need for an additional separate oscillation drive source. The equipment structure is compact and simplified, and multiple cleaning chambers can rotate synchronously with the turntable to achieve continuous production. The reciprocating staggered washing action can drive the bottle flakes to rotate autonomously, avoiding blind spots in local cleaning, and effectively improving the overall cleaning quality of the bottle flakes while controlling manufacturing costs.

[0018] 2. This invention achieves the function of elastic reset and buffering limit after the cleaning chamber is pushed by the connecting ring, extension rod, upright plate, and first elastic damping rod. This achieves stable control of the cleaning chamber's swing amplitude and balanced rebound force, solving the technical problems of excessive rebound impact and chaotic, unstable swing stroke. Compared with existing technologies, this split-type elastic connecting assembly is easy to assemble and disassemble, and the separate arrangement of components facilitates individual replacement of damaged parts. The damping buffer design can smoothly control the reciprocating swing rhythm of the cleaning chamber, ensuring continuous and stable cooperation between the lower and upper washing plates to complete the bottle flake washing operation.

[0019] 3. This invention achieves elastic buffering when the roller contacts the oblique protrusion through a sliding block, a second elastic damping rod, and a radially extending groove. This reduces instantaneous impact load and smoothly adjusts the deflection amplitude of the cleaning chamber, solving the technical problems of large impact from hard contact between the roller and the oblique protrusion and easy wear and tear on components. Compared with the prior art, the radially arranged groove combined with the second elastic damping rod can flexibly buffer the thrust, effectively reducing wear and tear on the roller and oblique protrusion, improving the smoothness of the cleaning chamber's swinging motion, and stabilizing the scrubbing stroke of the lower scrubbing plate.

[0020] 4. This invention achieves independent lifting and continuous rotation of the upper scrubbing plate through a linkage structure of the second support frame, sub-support, transmission gear, gear ring, and connecting shaft. This achieves complete decoupling of the upper scrubbing plate's rotation, lifting, and rotation actions without the need for an onboard motor or conductive slip ring. It solves the technical problems of traditional rotary cleaning equipment that require an onboard motor, rely on slip ring power supply, and have a high failure rate in humid environments. Compared to onboard motor solutions, this structure fixes the rotational power source to a fixed base, avoiding the risks associated with slip ring structures and electrical faults. Combined with a detachable locking assembly using oblique protrusions, it adapts to multiple cleaning processes, significantly improving the equipment's operational stability and versatility. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0022] Figure 2 This is a three-dimensional exploded view of the rotating worktable, cleaning chamber, and scrubbing mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0023] Figure 3 This is a three-dimensional schematic diagram of a single cleaning chamber, a scrubbing mechanism, and an auxiliary control mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0024] Figure 4This is a three-dimensional exploded view of a single cleaning chamber, a scrubbing mechanism, and an auxiliary control mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0025] Figure 5 This is a three-dimensional schematic diagram of the auxiliary control mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0026] Figure 6 This is a three-dimensional exploded view of a single cleaning chamber and auxiliary control mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0027] Figure 7 This is a cross-sectional schematic diagram of a single cleaning chamber and auxiliary control mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0028] Figure 8 This is the invention Figure 7 A magnified view of a portion of point A in the middle.

[0029] Figure 9 This is a three-dimensional schematic diagram of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention, after the upper scrubbing plate is moved up.

[0030] Figure 10 This is a three-dimensional schematic diagram of the drive mechanism of a multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to the present invention.

[0031] The diagram is labeled as follows: 1. Rotary worktable; 11. Rotary table; 111. Support column; 12. Fixed base; 121. Angled protrusion; 1211. Cover plate; 1212. Bolt; 122. Gear ring; 2. Cleaning chamber; 21. Lower scrubbing plate; 22. Upper scrubbing plate; 221. Connecting shaft; 3. Scrubbing mechanism; 31. Rotary drive assembly; 311. Support rod; 312. Roller; 32. Elastic connection assembly; 321. Connecting ring; 322. Extension... 323. Extension rod; 324. Vertical plate; 325. First elastic damping rod; 4. Drive mechanism; 41. Second support frame; 411. Second guide rod; 412. Sub-support; 4121. Transmission gear; 42. Rotating support; 5. Auxiliary control mechanism; 51. Buffer assembly; 511. Slide; 5111. Wedge; 512. Second elastic damping rod; 52. Pressurization assembly; 521. First support frame; 522. First guide rod; 523. Elastic sealing membrane. Detailed Implementation

[0032] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1 to 4 A multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes includes a rotating worktable 1, cleaning chambers 2, a scrubbing mechanism 3, and a driving mechanism 4. The rotating worktable 1 is equipped with a revolving rotating platform 11 and a rotary driver for driving the rotating platform 11 to rotate. A fixed base 12 is located at the center of the rotating worktable 1, and at least three oblique protrusions 121 are provided on the fixed base 12. At least three cleaning chambers 2 are provided. Support columns 111 are fixed on the rotating platform 11, and each cleaning chamber 2 is rotatably mounted on a corresponding support column 111. A lower scrubbing plate 21 and an upper scrubbing plate 22 are provided inside each cleaning chamber 2. The scrubbing mechanism 3 includes a rotary... The rotary drive assembly 31 and the elastic connection assembly 32 are provided. The rotary drive assembly 31 includes a support rod 311 disposed at the bottom of the cleaning chamber 2 and a roller 312 rotatably sleeved on the support rod 311. The roller 312 can slide and cooperate with the inclined protrusion 121 as the rotary table 11 revolves. The drive mechanism 4 is used to drive the upper scrubbing plate 22 to perform lifting and rotating movements. When the rotary table 11 revolves and drives the roller 312 to slide along the inclined protrusion 121, the inclined protrusion 121 pushes the cleaning chamber 2 to deflect via the roller 312. After the roller 312 disengages from the inclined protrusion 121, the cleaning chamber 2 resets under the elastic force of the elastic connection assembly 32 and drives the lower scrubbing plate 21 to swing.

[0034] This invention utilizes an inclined protrusion 121, rollers 312, support rods 311, and an elastic connecting assembly 32 to achieve the function of the lower scrubbing plate 21 and the upper scrubbing plate 22 working together to rub the bottle flakes. This achieves the effect of intermittent reciprocating gradient scrubbing and peeling off the adhering debris on the surface of the bottle flakes, solving the technical problem of residual adhesive residue on the surface of traditional PET bottle flakes due to only rubbing one side. During operation, the drive mechanism 4 drives the upper scrubbing plate 22 to complete lifting and rotation movements, so that the upper scrubbing plate 22 and the lower scrubbing plate 21 work together to clean the bottle flakes in the cleaning chamber 2. The upper scrubbing plate 22 and the lower scrubbing plate 21 are evenly distributed with protrusions for rubbing and bumping the PET bottle flakes. During operation, the upper scrubbing plate 22 and the lower scrubbing plate 21 move relative to each other, and the protrusions on the plate surfaces alternately squeeze and scrape the bottle flakes inside the chamber, relying on the protruding structure to enhance the peeling ability of the adhering dirt. The rotary drive drives the rotary table 11 to maintain its revolution. Each cleaning chamber 2 moves synchronously around the fixed base 12 following the rotary table 11. When the roller 312 at the bottom of the cleaning chamber 2 passes the inclined protrusion 121, it slides along the inclined surface and is pushed laterally, causing the cleaning chamber 2 to deflect around the support column 111. The lower scrubbing plate 21 inside deflects synchronously. After the roller 312 leaves the inclined protrusion 121, the external pushing force disappears. The elastic connecting component 32 pulls the cleaning chamber 2 to rotate back to its original position by its own elasticity. The lower scrubbing plate 21 swings in the opposite direction and works with the upper scrubbing plate 22 to continuously rub and clean the PET bottle flakes inside the cavity. The rotating table can continuously repeat the above scrubbing action. Compared to existing technologies, this invention relies entirely on existing components to achieve the reciprocating rubbing motion, without the need for an additional separate oscillation drive source. The equipment has a compact and simplified structure, and the multiple cleaning chambers 2 rotate synchronously with the turntable to achieve continuous production. The reciprocating rubbing motion can drive the bottle flakes to turn autonomously, avoiding blind spots in local cleaning, and effectively improving the overall cleaning quality of the bottle flakes while controlling manufacturing costs.

[0035] Reference Figures 2 to 4 The elastic connection assembly 32 includes a connecting ring 321, an extension rod 322, a vertical plate 323, and a first elastic damping rod 324. The connecting ring 321 is fixedly sleeved on the support column 111, the extension rod 322 and the connecting ring 321 are fixedly connected, the vertical plate 323 is fixedly installed at the bottom of the cleaning chamber 2, and the two ends of the first elastic damping rod 324 are respectively hinged and assembled between the extension rod 322 and the vertical plate 323. After the cleaning chamber 2 is pushed and deflected by the inclined protrusion 121, it can complete the rotation and reset with the damping force of the first elastic damping rod 324.

[0036] This invention achieves the function of elastic reset and buffering limit after the cleaning chamber 2 is pushed by the connecting ring 321, the extension rod 322, the upright plate 323, and the first elastic damping rod 324. This achieves the effect of stably controlling the swing amplitude of the cleaning chamber 2 and balancing the rebound force, solving the technical problems of excessive rebound impact and chaotic and unstable swing stroke of the cleaning chamber 2. During operation, the cleaning chamber 2 is pushed by the roller 312 and deflects. The upright plate 323 at the bottom of the cleaning chamber 2 moves synchronously with the cleaning chamber 2. The upright plate 323 pulls the first elastic damping rod 324 to deform. The extension rod 322 is kept in a fixed position by the support column 111 via the connecting ring 321. After the roller 312 disengages from the inclined protrusion 121, the deformed first elastic damping rod 324 releases its elastic force, pulling the upright plate 323 and the cleaning chamber 2 to rotate and reset. The damping structure synchronously buffers the reset impact and limits the reciprocating swing range of the lower scrubbing plate 21. During the swing of the lower scrubbing plate 21, it cooperates with the upper scrubbing plate 22 to rub and clean the material. Compared to existing technologies, this split-type elastic connection component 32 is easy to assemble and disassemble, and the separate arrangement of parts makes it easy to replace damaged parts individually in the future. The damping buffer design can smoothly control the reciprocating swing rhythm of the cleaning chamber 2, ensuring that the lower scrubbing plate 21 and the upper scrubbing plate 22 work together to complete the bottle flake scrubbing operation.

[0037] Reference Figures 3 to 5 The cleaning chamber 2 is also provided with an auxiliary control mechanism 5, which includes a buffer assembly 51. The buffer assembly 51 includes a slide block 511 and a second elastic damping rod 512. The bottom of the cleaning chamber 2 is provided with a radially extending slide groove. The slide block 511 is slidably assembled inside the slide groove, and the support rod 311 is fixed on the slide block 511. The second elastic damping rod 512 is arranged in the slide groove and is connected to the slide block 511. The slide block 511 can elastically slide along the slide groove by relying on the second elastic damping rod 512.

[0038] This invention achieves the function of elastic buffering when the roller 312 contacts the inclined protrusion 121 through the slide block 511, the second elastic damping rod 512, and the radially extending groove. This reduces the instantaneous impact load and smoothly adjusts the deflection amplitude of the cleaning chamber 2, solving the technical problems of large impact from hard contact between the roller 312 and the inclined protrusion 121 and easy wear and tear of the components. During operation, the roller 312 is pushed by the inclined protrusion 121, generating a lateral force. The force is transmitted to the slide block 511 through the support rod 311. The slide block 511 slides radially along the groove and squeezes the second elastic damping rod 512. The deformation of the second elastic damping rod 512 absorbs the impact load. After the roller 312 disengages from the inclined protrusion 121, the second elastic damping rod 512 rebounds and drives the slide block 511 to reset. The support rod 311 and the roller 312 then return to their initial positions. Compared with existing technologies, the radially arranged grooves, combined with the second elastic damping rod 512, can flexibly buffer the top thrust, effectively reduce the wear and tear of the roller 312 and the oblique protrusion 121, improve the smoothness of the swinging motion of the cleaning chamber 2, and stabilize the scrubbing stroke of the scrubbing plate 21.

[0039] Reference Figures 3 to 5 The auxiliary control mechanism 5 also includes a pressure boosting component 52 for lifting the lower scrubbing plate 21; the pressure boosting component 52 is connected to the slide 511 in a transmission manner, and during the process of the slide 511 sliding towards the axis of the cleaning chamber 2 to compress the second elastic damping rod 512, the slide 511 is linked with the pressure boosting component 52 to lift the lower scrubbing plate 21.

[0040] This invention achieves the function of synchronously driving the sliding of the slide 511 to raise and lower the scrubbing plate 21 and adjust the pressure during the scrubbing process by using the pressure boosting component 52 and the slide 511. This allows for dynamic changes in the scrubbing distance and real-time control of the scrubbing and pressing force. During operation, the roller 312 is pushed by the inclined protrusion 121, causing the slide 511 to slide towards the axis of the cleaning chamber 2. Simultaneously, the slide 511 compresses the second elastic damping rod 512, which in turn activates the pressure boosting component 52. The pressure boosting component 52 synchronously raises the lower scrubbing plate 21, reducing the gap between the lower scrubbing plate 21 and the upper scrubbing plate 22 to increase the material scrubbing pressure. After the roller 312 disengages from the inclined protrusion 121, the second elastic damping rod 512 rebounds, causing the slide 511 to reset in the opposite direction. The pressure boosting component 52 then releases its lifting action, and the lower scrubbing plate 21 falls back to its initial height. Compared to existing technologies, the pressure adaptive adjustment is achieved by relying on the displacement synchronization of the slide 511, without the need for an additional independent lifting power source. The synchronous linkage structure is simple and compact, and the amount of scrubbing and pressing can be changed in real time according to the pushing stroke of the roller 312, further improving the cleaning effect.

[0041] Reference Figures 5 to 8The pressurization component 52 includes a first support frame 521 and a first guide rod 522. The first support frame 521 is arranged inside the cleaning chamber 2. There are at least two first guide rods 522. The first guide rods 522 are fixedly connected to the first support frame 521. The cleaning chamber 2 has guide grooves that correspond one-to-one with the first guide rods 522. Each first guide rod 522 is slidably assembled with the corresponding guide groove. The first support frame 521 slides with the first guide rods 522 to achieve lifting and support the lower scrubbing plate 21.

[0042] This invention utilizes a first support frame 521, a first guide rod 522, and a guide groove to achieve the functions of directional sliding and lifting of the first support frame 521 and stable lifting of the lower scrubbing plate 21. This achieves the effect of limiting the lifting trajectory and ensuring smooth lifting and pressure adjustment of the lower scrubbing plate 21, solving the technical problems of misalignment and uneven pressure application of the lower scrubbing plate 21 during lifting. During operation, the slide block 511 moves in conjunction with the first support frame 521. The first support frame 521, relying on the first guide rod 522, slides and lifts directionally along the guide groove of the cleaning chamber 2. The first guide rod 522 and the guide groove cooperate to constrain the movement direction of the first support frame 521, preventing tilting or deviation during its lifting process. Simultaneously, the lifting process of the first support frame 521 lifts the lower scrubbing plate 21 to complete the pressurization. Compared with existing technologies, multiple first guide rods 522 cooperate with guide grooves to limit and guide the first support frame 521, making the lifting operation stable and reliable. This ensures that the overall lifting height of the lower scrubbing plate 21 is consistent and the scrubbing pressure is evenly distributed. The overall structure relies on the original slide block 511 for linkage drive, eliminating the need for a separate lifting power component.

[0043] Reference Figures 6 to 8 The pressurization assembly 52 also includes an elastic sealing membrane 523 that is sealed to the inner wall of the cleaning chamber 2. The elastic sealing membrane 523 is disposed between the first support frame 521 and the lower scrubbing plate 21.

[0044] This invention utilizes an elastic sealing membrane 523 to achieve flexible force transmission and cavity isolation between the first support frame 521 and the lower scrubbing plate 21, thus buffering the top support pressure and isolating sewage and debris. During operation, the first support frame 521 rises upwards, and the elastic sealing membrane 523 flexibly pushes the lower scrubbing plate 21. The elastic sealing membrane 523, through its airtight connection with the inner wall of the cleaning chamber 2, isolates the cleaning sewage and material debris inside the cavity, preventing dirt from leaking downwards to the slide 511, the second elastic damping rod 512, the elastic connecting assembly 32, and other bottom components. Compared to existing technologies, the elastic sealing membrane 523 can isolate and protect the upper and lower spaces of the cleaning chamber 2, preventing dirt from corroding various moving parts at the bottom, effectively reducing the probability of rust and blockage of components, and extending the service life of the entire machine.

[0045] Reference Figures 5 to 8A wedge block 5111 is fixedly connected to the slide block 511. During the movement of the slide block 511 towards the axis of the cleaning chamber 2, the wedge block 5111 squeezes the first support frame 521 and lifts the first support frame 521.

[0046] This invention utilizes a wedge block 5111 and a slide block 511 to convert the horizontal displacement of the slide block 511 into the vertical lifting action of the first support frame 521, achieving the effect of reversing the horizontal driving force and simultaneously lifting the lower scrubbing plate 21 to adjust the clamping force. During operation, the slide block 511 slides towards the axis of the cleaning chamber 2, and the wedge block 5111 moves synchronously with it. The inclined surface of the wedge block 5111 abuts against and presses against the first support frame 521, pushing it upwards along the guide rod and guide groove. Simultaneously, the first support frame 521 drives the lower scrubbing plate 21 upwards to shorten the scrubbing interval. After the slide block 511 returns to its original position, the wedge block 5111 releases its pressure limit on the first support frame 521, and the first support frame 521 and the lower scrubbing plate 21 naturally fall back down. Compared to existing technologies, the wedge-shaped inclined pressure structure completes the force conversion, and the vertical lifting and pressure adjustment can be achieved by relying on the horizontal stroke of the original slide 511. There is no need to add additional transmission rods and drive sources, the number of parts is small, and the transmission linkage is reliable.

[0047] Reference Figure 1 , Figure 9 and Figure 10 The driving mechanism 4 includes a second support frame 41 and a rotating bracket 42; the second support frame 41 is fixedly mounted on the rotating table 11, and the second guide rod 411 is fixedly mounted on the second support frame 41. The rotating bracket 42 and the second guide rod 411 are slidably engaged; the upper scrubbing plate 22 is coaxially fixedly connected to a connecting shaft 221, and the rotating bracket 42 is rotatably connected to the connecting shaft 221. The fixed base 12 is equipped with a linear actuator for driving the rotating bracket 42 to rise and fall. When the linear actuator drives the rotating bracket 42 to rise, it drives the connecting shaft 221 to rise synchronously.

[0048] This invention achieves stable vertical lifting and independent rotation of the upper scrubbing plate 22 through a second support frame 41, a second guide rod 411, a rotating bracket 42, a connecting shaft 221, and a linear actuator. This allows for adjustment of the scrubbing interval and solves the technical problems of traditional cleaning equipment requiring slip rings for rotation drive and having a high failure rate. During operation, the extension and retraction of the linear actuator on the fixed base 12 drives the rotating bracket 42 to slide vertically along the second guide rod 411, thereby driving the connecting shaft 221 and the upper scrubbing plate 22 to synchronously complete the lifting and lowering adjustment. The rotating bracket 42 forms a rotational support with the connecting shaft 221 through bearings. Relying on the rotational characteristics of the bearings, the rotating bracket 42 only provides vertical support and lifting traction force for the connecting shaft 221, without restricting the circumferential rotation of the connecting shaft 221, ensuring that the connecting shaft 221 can drive the upper scrubbing plate 22 to rotate continuously and stably. Compared to existing technologies, the linear actuator is fixedly arranged on a stationary base 12, eliminating the need for it to revolve with the rotary table 11. This eliminates the need for a conductive slip ring power supply structure, effectively reducing the probability of electrical failures and production costs under humid conditions. At the same time, the bearing support structure completely decouples the lifting and rotating motions, allowing the two sets of actions to operate independently without interference. This results in stronger equipment stability and allows it to work in conjunction with the dynamic oscillation and pressure adjustment of the lower scrubbing plate 21 to form a multi-level gradient scrubbing operation, significantly improving the overall cleaning quality of PET bottle flakes.

[0049] Reference Figure 1 , Figure 9 and Figure 10 The second support frame 41 is fixedly provided with a secondary support 412, and a transmission gear 4121 is rotatably mounted on the secondary support 412. The transmission gear 4121 is slidably sleeved on the outside of the connecting shaft 221. The two are connected by an axial keyway and a flat key to achieve circumferential transmission. The rotation of the transmission gear 4121 can drive the connecting shaft 221 to rotate synchronously. The fixed base 12 is fixedly provided with a toothed ring 122 that meshes with the transmission gear 4121.

[0050] This invention achieves the function of automatically driving the upper scrubbing plate 22 to rotate continuously during revolution through the secondary support 412, transmission gear 4121, gear ring 122, and connecting shaft 221. This achieves the effect of eliminating the need for an independent rotational power source and ensuring that lifting and rotational actions do not interfere with each other, solving the technical problems of traditional rotary cleaning equipment requiring an onboard rotary motor, relying on slip ring power supply, and having a high failure rate. During operation, the rotating table 11 revolves, driving the second support frame 41, secondary support 412, and transmission gear 4121 to move around the fixed base 12. The transmission gear 4121 always maintains engagement with the fixed gear ring 122, and during movement, it is constrained by the gear ring 122 to continuously rotate, thereby driving the connecting shaft 221 to rotate synchronously with the upper scrubbing plate 22. Simultaneously, the transmission gear 4121 is slidably sleeved on the outside of the connecting shaft 221, adapting to the vertical lifting stroke of the connecting shaft 221. Combined with the bearing support structure of the rotating support 42, this ensures that the lifting and rotational actions of the upper scrubbing plate 22 are completely independent and do not interfere with each other. Compared with the prior art, the present invention uses a fixed gear ring 122 meshing transmission to realize the rotation of the upper scrubbing plate 22, eliminating the need to arrange a rotary drive motor and conductive slip ring on the rotary table 11, which greatly reduces the probability of electrical failure and manufacturing cost. At the same time, the sliding sleeve structure is used to adapt to the lifting stroke, and the mechanical linkage transmission throughout the process is stable and reliable. Combined with the swing pressure adjustment of the lower scrubbing plate 21, a multi-level gradient cleaning operation is formed, which greatly improves the cleaning uniformity and equipment operation stability.

[0051] Reference Figure 3 and Figure 4 The oblique protrusion 121 is equipped with a cover plate 1211 and a bolt 1212. The fixed base 12 has at least three mounting slots for accommodating the oblique protrusion 121. The oblique protrusion 121 is embedded in the mounting slot and locked and fixed to the fixed base 12 by the cover plate 1211 and the bolt 1212.

[0052] This invention utilizes a mounting groove, a cover plate 1211, bolts 1212, and an inclined protrusion 121 to achieve detachable positioning and stable fixing of the inclined protrusion 121, enabling quick disassembly and replacement, and flexible adjustment of the protrusion. During operation, the inclined protrusion 121 is positioned by being embedded into the mounting groove of the fixed base 12. After being pressed and limited by the cover plate 1211, it is locked in place by the bolts 1212, ensuring the inclined protrusion 121 remains stable and does not shift during continuous operation. It can continuously slide and cooperate with the rollers 312 to complete the reciprocating oscillation operation of the cleaning chamber 2. When the inclined protrusion 121 wears out or the number of inclined protrusions 121 needs to be adjusted to adapt to different cleaning conditions, the bolts 1212 and the cover plate 1211 can be directly disassembled, and the corresponding inclined protrusion 121 can be individually disassembled and installed. Compared to existing technologies, this structure adopts a split, detachable, and locking assembly method, which allows for the inspection and replacement of a single oblique protrusion 121 without disassembling the main body of the equipment. This significantly reduces the difficulty of equipment maintenance and downtime costs. At the same time, oblique protrusions 121 with different parameters can be flexibly replaced according to the cleaning level requirements of PET bottle flakes, adapting to multi-level gradient cleaning processes, making the equipment more versatile and practical.

[0053] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes, characterized in that, It includes a rotating worktable (1), a cleaning chamber (2), a scrubbing mechanism (3), and a drive mechanism (4); The rotary worktable (1) is provided with a rotating platform (11) that can revolve around a central axis and a rotary driver for driving the rotating platform (11) to rotate. A fixed base (12) is provided at the center of the rotary worktable (1), and at least three oblique protrusions (121) are provided on the fixed base (12). The cleaning chamber (2) is provided with at least three, and a support column (111) is fixed on the rotating table (11). The cleaning chamber (2) is rotatably assembled on the corresponding support column (111). The cleaning chamber (2) is provided with a lower scrubbing plate (21) and an upper scrubbing plate (22). The scrubbing mechanism (3) includes a rotary drive assembly (31) and an elastic connection assembly (32). The rotary drive assembly (31) includes a support rod (311) disposed at the bottom of the cleaning chamber (2) and a roller (312) rotatably sleeved on the support rod (311). The roller (312) can slide and cooperate with the inclined protrusion (121) as the rotating table (11) revolves. The drive mechanism (4) is used to drive the upper scrubbing plate (22) to perform lifting and rotating movements; When the rotating table (11) revolves and drives the roller (312) to slide along the inclined protrusion (121), the inclined protrusion (121) pushes the cleaning chamber (2) to deflect via the roller (312). After the roller (312) disengages from the inclined protrusion (121), the cleaning chamber (2) resets under the elastic force of the elastic connecting component (32) and drives the lower scrubbing plate (21) to swing.

2. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 1, characterized in that, The elastic connection assembly (32) includes a connecting ring (321), an extension rod (322), a vertical plate (323), and a first elastic damping rod (324). The connecting ring (321) is fixedly sleeved on the support column (111), the extension rod (322) and the connecting ring (321) are fixedly connected, the upright plate (323) is fixedly installed at the bottom of the cleaning chamber (2), and the two ends of the first elastic damping rod (324) are respectively hinged and assembled between the extension rod (322) and the upright plate (323). After the cleaning chamber (2) is pushed and deflected by the oblique protrusion (121), it can complete the rotation and reset with the help of the damping elastic force of the first elastic damping rod (324).

3. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 1, characterized in that, The cleaning chamber (2) is also provided with an auxiliary control mechanism (5), which includes a buffer assembly (51), and the buffer assembly (51) includes a slide (511) and a second elastic damping rod (512). The bottom of the cleaning chamber (2) is provided with a radially extending groove, the slide block (511) is slidably assembled inside the groove, and the support rod (311) is fixed on the slide block (511). The second elastic damping rod (512) is arranged in the groove and is connected to the slide block (511). The slide block (511) can slide elastically along the groove by relying on the second elastic damping rod (512).

4. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 3, characterized in that, The auxiliary control mechanism (5) also includes a pressurizing component (52) for lifting the lower scrubbing plate (21). The pressurizing component (52) and the slide (511) are connected by a drive. During the process of the slide (511) sliding towards the axis of the cleaning chamber (2) to compress the second elastic damping rod (512), the slide (511) is linked with the pressurizing component (52) to lift the lower scrubbing plate (21).

5. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 4, characterized in that, The booster assembly (52) includes a first support frame (521) and a first guide rod (522); The first support frame (521) is arranged inside the cleaning chamber (2). There are at least two first guide rods (522). The first guide rods (522) are fixedly connected to the first support frame (521). The cleaning chamber (2) has guide grooves that correspond one-to-one with the first guide rods (522). Each first guide rod (522) is slidably assembled with the corresponding guide groove. The first support frame (521) slides with the first guide rods (522) to achieve lifting and lowering and support the scrubbing board (21).

6. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 5, characterized in that, The pressurization assembly (52) also includes an elastic sealing membrane (523) that is sealed to the inner wall of the cleaning chamber (2), and the elastic sealing membrane (523) is located between the first support frame (521) and the lower scrubbing plate (21).

7. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 5, characterized in that, A wedge (5111) is fixedly connected to the slide (511). During the movement of the slide (511) toward the axis of the cleaning chamber (2), the wedge (5111) squeezes the first support frame (521) and lifts the first support frame (521).

8. The multi-stage gradient cleaning and treatment equipment for recycling waste PET bottle flakes according to claim 1, characterized in that, The drive mechanism (4) includes a second support frame (41) and a rotating bracket (42). The second support frame (41) is fixedly mounted on the rotary table (11), and the second guide rod (411) is fixedly mounted on the second support frame (41). The rotary bracket (42) and the second guide rod (411) are slidably engaged. The upper scrubbing plate (22) is coaxially fixed to a connecting shaft (221). The rotating bracket (42) is rotatably connected to the connecting shaft (221). The fixed base (12) is equipped with a linear driver for driving the rotating bracket (42) to rise and fall. When the linear driver drives the rotating bracket (42) to rise, it drives the connecting shaft (221) to rise synchronously.

9. A multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to claim 8, characterized in that, A secondary support (412) is fixedly installed on the second support frame (41), and a transmission gear (4121) is rotatably mounted on the secondary support (412). The transmission gear (4121) is slidably sleeved on the outside of the connecting shaft (221), and the two achieve circumferential transmission through the axial keyway and the flat key. The rotation of the transmission gear (4121) can drive the connecting shaft (221) to rotate synchronously. A gear ring (122) that meshes with the transmission gear (4121) is fixedly installed on the fixed base (12).

10. A multi-stage gradient cleaning and treatment device for recycling waste PET bottle flakes according to claim 1, characterized in that, The oblique protrusion (121) is equipped with a cover plate (1211) and a bolt (1212). The fixed base (12) has at least three mounting grooves for accommodating the oblique protrusion (121). The oblique protrusion (121) is embedded in the mounting groove and is locked and fixed to the fixed base (12) by the cover plate (1211) and the bolt (1212).

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