Double-cylinder type strong friction cleaning machine for waste plastic recovery

Abstract

The invention relates to a double-barrel type strong friction cleaning machine for waste plastic recovery. Two parallel cylindrical cavities are formed in a barrel of the double-barrel type strong friction cleaning machine; the material stirring blades comprise the large blades and the small blades, the multiple large blades are distributed in an equal-interval circumferential array mode in the axial direction of the main shaft to form a large material stirring set, the multiple small blades are distributed in an equal-interval circumferential array mode in the axial direction of the main shaft to form a small material stirring set, and the multiple large material stirring sets and the multiple small material stirring sets are alternately arranged in the axial direction of the main shaft. The two main shafts are located on the central axes of the two cylindrical cavities correspondingly, one large material stirring set on one main shaft and one adjacent small material stirring set on the other main shaft are located on the same cross section of the barrel, and the large material stirring set and the small material stirring set form a circulating material stirring set. A material guiding channel used for guiding materials in the upstream circulating material stirring set into the downstream circulating material stirring set is arranged in the barrel. According to the friction cleaning device, plastic materials can move in the barrel body in a snakelike winding mode, and the friction cleaning quality and the cleaning efficiency of the plastic materials are bi-directionally improved.

Description

Technical Field

[0001] This application relates to the technical field of waste plastic recycling, and in particular to a dual-cylinder high-power friction cleaning machine for waste plastic recycling. Background Technology

[0002] With the rapid development of my country's comprehensive national strength and continuous social progress, plastic, as a major source of waste in people's daily lives, not only occupies a large amount of space but also pollutes the air, soil, and water. Furthermore, the long degradation cycle of plastic has made it one of the major environmental problems facing humanity. As people's living standards improve, the importance of the environment becomes increasingly apparent. Plastic recycling and reuse can not only generate economic benefits but also solve the problem of environmental pollution.

[0003] Friction cleaning is a very important step in plastic recycling. Most existing friction machines on the market are single-cylinder friction machines, which drive multiple feeding blades to make the material rub against the wear-resistant plate when a single main shaft rotates. They have a short service life, low friction efficiency, and short material residence time, resulting in poor plastic friction effect and directly affecting the quality of the finished product.

[0004] In addition, existing friction cleaning machines are divided into two types: intermittent and continuous. Intermittent friction cleaning machines use continuous large-volume water injection for cleaning, which makes it easy to control product quality, but the processing efficiency is low and it is not suitable for production line use. Continuous friction cleaning machines mainly rely on spiral-arranged feeding blades to push the material, but this spiral arrangement of feeding blades will cause the material to be conveyed too fast, resulting in poor cleaning effect. Reducing the spindle speed will also affect the overall cleaning efficiency of plastics.

[0005] Therefore, there is an urgent need to develop a powerful friction cleaning machine that can improve the quality and efficiency of plastic friction cleaning without changing the arrangement of the feeding blades. Summary of the Invention

[0006] To address the issue of failing to balance the quality and efficiency of plastic friction cleaning without adjusting the arrangement of the feeding blades, this application provides a dual-cylinder high-power friction cleaner for waste plastic recycling.

[0007] The technical solution provided in this application for a double-cylinder high-power friction cleaning machine for waste plastic recycling is as follows: A double-cylinder high-power friction cleaning machine for waste plastic recycling includes a base, a cylinder, a feed hopper, a discharge hopper, a main shaft, and multiple feeding blades. The cylinder contains two parallel cylindrical cavities that are radially connected and the distance between their central axes is greater than the radius of the larger cylindrical cavity and less than the sum of the radii of the two cylindrical cavities. The feeding blades include large blades and small blades. A number of large blades are arranged in a circular array with equal intervals along the main axis to form a large feeding group. A number of small blades are arranged in a circular array with equal intervals along the main axis to form a small feeding group. Multiple large feeding groups and multiple small feeding groups are alternately arranged along the main axis. The main shaft is provided in two places and is located on the central axis of the two cylindrical cavities respectively. A set of large material feeding groups on one main shaft and a set of small material feeding groups adjacent to the other main shaft are located on the same cross section of the cylinder, and the two form a circulating material feeding group. The cylinder is equipped with a guide channel for guiding the material in the upstream circulating material feeding group to the downstream circulating material feeding group.

[0008] Furthermore, the inner wall of the cylinder is provided with multiple wear-resistant plate groups along its axial direction. The wear-resistant plate group includes a large wear-resistant arc plate, a small wear-resistant arc plate, a constricted arc plate, and a flared arc plate. The large wear-resistant arc plate and the small wear-resistant arc plate are integrally formed to form a friction part. The constricted arc plate and the flared arc plate are integrally formed to form a material guiding part. The multiple friction parts and the multiple material guiding parts are alternately connected along the axial direction of the cylinder. The wear-resistant large arc plate corresponds to the large material feeding group, and the wear-resistant small arc plate corresponds to the small material feeding group; The flared end of the tapered arc plate is connected to the end of the adjacent wear-resistant large arc plate, and the tapered end is connected to the end of the adjacent wear-resistant small arc plate; the tapered end of the flared arc plate is connected to the end of the adjacent wear-resistant small arc plate, and the flared end is connected to the end of the adjacent wear-resistant large arc plate.

[0009] Furthermore, the constricting arc plate is used to restrict the material in the wear-resistant large arc plate corresponding to the circulating material feeding group from flowing into the next circulating material feeding group, and the flaring arc plate is used to form the material guiding channel.

[0010] Furthermore, the inner diameter of the wear-resistant small arc plate increases along the material conveying direction in the cylinder.

[0011] Furthermore, the joint between the upper inner side of the wear-resistant large arc plate and the wear-resistant small arc plate is a flat part, and the joint between the lower inner side is a pointed part.

[0012] Furthermore, the wear-resistant small arc plate has a gentle arc surface on the inner arc side near the tip, and the radius of curvature of the gentle arc surface is greater than the radius of the wear-resistant small arc plate.

[0013] Furthermore, an acceleration nozzle is provided on the side of the wear-resistant large arc plate opposite to the material conveying direction, a main pipeline connected to an external medium source is provided inside the main shaft, and a branch pipeline for connecting the main pipeline and the acceleration nozzle is provided on the wear-resistant large arc plate. The acceleration nozzle is directed downstream of the wear-resistant small arc plate, and the straight-line distance between the acceleration nozzle and the corresponding spindle centerline is less than or equal to the inner diameter of the wear-resistant small arc plate.

[0014] Furthermore, a rotary joint is connected to the end of the main shaft. The inner channel of the rotary joint is connected to the main pipeline, and the outer channel is connected to a conveying pipe that is connected to an external medium source. An electromagnetic flow valve is installed on the conveying pipe, and the electromagnetic flow valve is electrically connected to an acceleration controller. The acceleration controller is used to control the conveying speed of the material in the cylinder.

[0015] Furthermore, an electromagnetic pulse valve is installed on the delivery pipe, and the electromagnetic pulse valve is electrically connected to the acceleration controller.

[0016] Furthermore, a material flow monitoring mechanism is provided at the discharge hopper, and the material flow monitoring mechanism is connected to the acceleration controller.

[0017] In summary, the beneficial technical effects of this application are as follows: 1. The plastic material flows along the wear-resistant large arc plate - wear-resistant small arc plate - downstream wear-resistant large arc plate - downstream wear-resistant small arc plate - next downstream wear-resistant large arc plate - next downstream wear-resistant small arc plate in the cylinder, mimicking the serpentine movement in nature. This can improve the shear work capacity per unit volume, greatly extend the residence time of the plastic material in the two cylindrical cavities of the cylinder, and enhance the disturbance intensity, thereby achieving a two-way improvement in the friction cleaning quality and cleaning efficiency of the plastic material. 2. Multiple feeding blades on the two main shafts rotate in opposite directions to rub against each other, which can subject the plastic material between the large feeding group and the small feeding group in the same cycle to bidirectional high-speed shearing action, which is equivalent to forming a "micro-grinding zone" in a local area, which can significantly improve the removal efficiency of attached contaminants; moreover, driven by the feeding blades, the plastic material is not only pushed forward, but also undergoes frequent tumbling and scattering, forcing the plastic material to constantly change its flow direction to expose new surfaces for cleaning, which is also conducive to improving the cleaning quality. 3. The inner diameter of the wear-resistant small arc plate increases along the material conveying direction in the cylinder, which makes it more likely that the plastic material contained in the small material feeding group in the wear-resistant small arc plate will flow to the downstream wear-resistant large arc plate when it rotates with the main shaft. This can reduce the probability of plastic material stagnation in the wear-resistant small arc plate or backflow upstream, ensuring that the plastic material flow can "only go forward and not back" in the complex double-cavity alternating structure. 4. When the feed rate in the feed hopper suddenly increases or the discharge rate in the discharge hopper suddenly decreases, and the material conveying resistance inside the cylinder increases, the acceleration controller can control the electromagnetic flow valve to open or increase the flow rate, so that when the wear-resistant large arc plate rotates, it sprays fluid medium into the inner side of the downstream wear-resistant small arc plate through multiple acceleration nozzles, thereby accelerating the flow rate of plastic material along the cylinder axis, eliminating or preventing blockage, and realizing dynamic, adjustable, and intelligent control of the material conveying speed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of this application embodiment with the base and cylinder removed; Figure 3 yes Figure 2 Top view; Figure 4 It is along Figure 3 Schematic diagram of the cross-sectional structure along line AA; Figure 5 This is an exploded view of the wear-resistant plate assembly according to an embodiment of this application; Figure 6 This is a partial cross-sectional view of the wear-resistant plate assembly after the upper half has been removed, according to an embodiment of this application. Figure 7 yes Figure 6 Top view.

[0019] Explanation of reference numerals in the attached figures: 1. Base; 2. Cylinder body; 21. Feed hopper; 22. Discharge hopper; 23. Cylindrical cavity; 3. Main shaft; 31. Circulating feeding assembly; 32. Friction section; 33. Feeding section; 4. Large material feeding assembly; 41. Large blades; 5. Small material feeding group; 51. Small blade; 61. Wear-resistant large arc plate; 62. Wear-resistant small arc plate; 621. Gentle arc surface; 63. Tapered arc plate; 64. Flared arc plate; 65. Flat part; 66. Pointed part; 7. Accelerate the nozzle; 81. Rotary joint; 82. Delivery pipe; 83. Electromagnetic flow valve; 84. Electromagnetic pulse valve. Detailed Implementation

[0020] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] This application discloses a dual-cylinder high-power friction cleaner for recycling waste plastics. (Refer to...) Figure 1 It includes a base 1, a cylinder 2, a feed hopper 21, a discharge hopper 22, a main shaft 3, and multiple material feeding blades. Inspection ports can be provided on the top of the cylinder 2 and the groove wall. The discharge hopper 22 is equipped with a material discharge switch and a drive mechanism that drives the main shaft 3 to rotate. These are all existing technologies that can be fully implemented by those skilled in the art and do not need to be elaborated.

[0022] Specifically, refer to Figure 2 , Figure 3 and Figure 4 The cylinder 2 has two parallel cylindrical cavities 23 arranged along the axial direction of the cylinder 2. The two cylindrical cavities 23 are connected radially and the distance between their central axes is greater than the radius of the larger cylindrical cavity 23 and less than the sum of the radii of the two cylindrical cavities 23.

[0023] The feeding blades include large blades 41 and small blades 51. Several large blades 41 are arranged in a circular array with equal intervals along the main axis 3 to form a large feeding group 4. Several small blades 51 are arranged in a circular array with equal intervals along the main axis 3 to form a small feeding group 5. Multiple large feeding groups 4 and multiple small feeding groups 5 are alternately arranged along the main axis 3.

[0024] Two main shafts 3 are provided and located on the central axis of two cylindrical cavities 23 respectively. A set of large material feeding groups 4 on one main shaft 3 and a set of small material feeding groups 5 adjacent to the other main shaft 3 are located on the same cross section of the cylinder 2, and the two form a circulating material feeding group 31. The two main shafts 3 are driven with the same rotational angular velocity and opposite rotation directions to avoid interference between the large blades 41 and the small blades 51 in the same circulating material feeding group 31 when they rotate with their respective main shafts 3.

[0025] The cylinder 2 is provided with a guide channel for guiding the material in the upstream circulating material feeding group 31 to the downstream circulating material feeding group 31.

[0026] Specifically, refer to Figure 5 , Figure 6 and Figure 7Multiple wear-resistant plate assemblies are arranged along the axial direction of the inner wall of the cylinder 2. The wear-resistant plate assembly includes a large wear-resistant arc plate 61, a small wear-resistant arc plate 62, a constricted arc plate 63, and a flared arc plate 64. The large wear-resistant arc plate 61 and the small wear-resistant arc plate 62 are integrally formed to form a friction part 32, and the constricted arc plate 63 and the flared arc plate 64 are integrally formed to form a guide part 33. Multiple friction parts 32 and multiple guide parts 33 are alternately connected along the axial direction of the cylinder 2. In specific connection, the friction part 32 located downstream of two adjacent friction parts 32 needs to be rotated 180° around the midline of the cross-section of the line connecting the centers of the cross-sections of the two main axes 3 before being connected by the guide part 33 between them, so that the cycle of large wear-resistant arc plate 61-small wear-resistant arc plate 62 is sequentially formed in the same direction of the main axis 3.

[0027] Wear-resistant large arc plate 61 corresponds to large material feeding group 4, and wear-resistant small arc plate 62 corresponds to small material feeding group 5; The flared end of the constricted arc plate 63 is connected to the end of the adjacent wear-resistant large arc plate 61, and the constricted end is connected to the end of the adjacent wear-resistant small arc plate 62; the constricted end of the flared arc plate 64 is connected to the end of the adjacent wear-resistant small arc plate 62, and the flared end is connected to the end of the adjacent wear-resistant large arc plate 61.

[0028] Among them, the constricted arc plate 63 is used to restrict the material in the wear-resistant large arc plate 61 corresponding to the circulating material feeding group 31 from flowing into the next circulating material feeding group 31, and the flared arc plate 64 is used to form a material guiding channel.

[0029] Therefore, when the recycled plastic is fed into the cylinder 2 from the feed hopper 21, it enters the two connected cylindrical cavities 23. When the two main shafts 3 rotate at the same speed but in opposite directions, they can drive the multiple large blades 41 and small blades 51 on them to perform friction cleaning on the plastic material.

[0030] Specifically, when the plastic material is inside one of the wear-resistant large arc plates 61, the rotation of its corresponding main shaft 3 drives the rotation of multiple large blades 41 in a set of large material feeding groups 4, which can perform powerful friction cleaning on the plastic material. At this time, the constricting arc plate 63 connected to the downstream side of the wear-resistant large arc plate 61 can restrict the upstream material from flowing into the wear-resistant small arc plate 62 in the downstream friction part 32 too early, preventing the plastic material from "short-circuiting" in the axial flow of the cylinder 2. As the multiple large blades 41 in the large material feeding group 4 continue to rotate, some plastic material crosses the connecting area of ​​the two cylindrical cavities 23 and enters the wear-resistant small arc plate 62, which is the same friction part 32 as the wear-resistant large arc plate 61, realizing the migration of plastic material from the large material feeding group 4 to the small material feeding group 5 in the same circulating material feeding group 31. Of course, the remaining plastic material will continue to be friction-cleaned in the corresponding wear-resistant large arc plate 61 and wear-resistant small arc plate 62. Compared with the conventional single-cylinder friction cleaning machine, the double-cylinder high-power friction cleaning machine of this application has higher cleaning quality.

[0031] As for the plastic material entering the wear-resistant small arc plate 62, since its downstream is connected to the flared arc plate 64, the plastic material in the wear-resistant small arc plate 62 has a high probability of flowing into the wear-resistant large arc plate 61 in the downstream friction part 32 along the material guide channel formed by the rotation of multiple small blades 51 in the small feeding group 5. In this way, the plastic material can be migrated along the axial direction of the cylinder 2.

[0032] After sequential circulation, a closed-loop flow path resembling the number "∞" can be constructed: after entering from the feed hopper 21, the plastic material moves axially under the push of multiple circulating feeding groups 31, and achieves radial cross-cavity migration at each friction part 32. This greatly extends the residence time of the plastic material in the two cylindrical cavities 23 of the cylinder 2, enhances the disturbance intensity, and improves the cleaning efficiency of the dual-cylinder high-power friction cleaner of this application. Unlike the traditional linear propulsion or ring tumbling mode, this flow path of the plastic material in the cylinder 2 along the wear-resistant large arc plate 61 - wear-resistant small arc plate 62 - downstream wear-resistant large arc plate 61 - downstream wear-resistant small arc plate 62 - downstream-downstream wear-resistant large arc plate 61 - downstream-downstream wear-resistant small arc plate 62 mimics the serpentine meandering motion in nature, which can improve the shear work capacity per unit volume, thereby achieving a two-way improvement in the friction cleaning quality and cleaning efficiency of the plastic material.

[0033] In addition, the multiple feeding blades on the two main shafts 3 rotate in opposite directions to rub against each other, which can subject the plastic material between the large feeding group 4 and the small feeding group 5 in the same cycle feeding group 31 to bidirectional high-speed shearing action, which is equivalent to forming a "micro-grinding zone" in a local area, which can significantly improve the peeling efficiency of attached contaminants. Moreover, driven by the feeding blades, the plastic material is not only pushed forward, but also undergoes frequent tumbling and scattering, forcing the plastic material to constantly change its flow direction to expose new surfaces for cleaning, which is also conducive to improving the cleaning quality.

[0034] Of course, the wear-resistant large arc plate 61, wear-resistant small arc plate 62, constricted arc plate 63 and flared arc plate 64 in the wear-resistant plate group can all be independently disassembled and replaced from the inner wall of the cylinder 2, which is easy for later maintenance.

[0035] In order to facilitate the smooth transport of material in the wear-resistant small arc plate 62 to the wear-resistant large arc plate 61 in the downstream friction part 32.

[0036] In one feasible embodiment, on the one hand, the inner diameter of the wear-resistant small arc plate 62 increases gradually along the material conveying direction in the cylinder 2; that is, in the predetermined flow direction of the plastic material, the inner wall of the wear-resistant small arc plate 62 is set from high to low. This makes it more likely that the plastic material contained in the small material-pushing group 5 in the wear-resistant small arc plate 62 will flow downstream into the wear-resistant large arc plate 61 when it rotates with the main shaft 3. This reduces the probability of plastic material stagnation in the wear-resistant small arc plate 62 or backflow upstream, ensuring that the plastic material flow can "only go forward and not backward" in the complex dual-cavity alternating structure. Therefore, it can be understood that the cooperation between the wear-resistant small arc plate 62 and the small material-pushing group 5 can only play an auxiliary role in friction cleaning of the plastic material, and its main purpose is to guide the plastic material flow to the downstream friction part 32. However, the inclination angle of the inner wall of the wear-resistant small arc plate 62 is no greater than 5°, so as to prevent most of the plastic material entering the wear-resistant small arc plate 62 from flowing directly into the next friction part 32 without being friction-cleaned by the small material-pushing group 5.

[0037] On the other hand, the upper inner part of the wear-resistant large arc plate 61 and the wear-resistant small arc plate 62 forms a flat part 65, and the lower inner part forms a pointed part 66. The inner arc side of the wear-resistant small arc plate 62 near the pointed part 66 is provided with a gentle arc surface 621, the radius of curvature of which is larger than the radius of the wear-resistant small arc plate 62. Figure 4 , Figure 5 As shown.

[0038] Therefore, the upper flat portion 65 of the friction part 32 is mainly designed to address the impact of plastic material being rubbed, providing a larger contact area and structural strength, which is beneficial for stress dispersion and ensures the overall structural stability of the friction part 32. The pointed portion 66 greatly reduces the probability of plastic material getting stuck and accumulating during radial migration within the friction part 32. The gently curving surface 621 reduces the energy required for plastic material to migrate from the large wear-resistant arc plate 61 to the small wear-resistant arc plate 62. Simultaneously, the gently curving surface 621 also acts as a guide and buffer, facilitating the migration of plastic material from the large wear-resistant arc plate 61 to the small wear-resistant arc plate 62.

[0039] In another feasible embodiment, refer to Figure 1 and Figure 7 An acceleration nozzle 7 is provided on the side of the wear-resistant large arc plate 61 away from the material conveying direction. A main pipeline connected to an external medium source is provided inside the main shaft 3. A branch pipeline for connecting the main pipeline and the acceleration nozzle 7 is provided on the wear-resistant large arc plate 61. The external medium can be compressed air, water or a mixture of air and water.

[0040] The acceleration nozzle 7 points to the downstream wear-resistant small arc plate 62, and the straight-line distance between the acceleration nozzle 7 and the corresponding central axis of the main shaft 3 is less than or equal to the inner diameter of the wear-resistant small arc plate 62.

[0041] The main shaft 3 is connected to a rotary joint 81 at one end. The inner channel of the rotary joint 81 is connected to the main pipeline, and the outer channel is connected to a conveying pipe 82 connected to an external medium source. An electromagnetic flow valve 83 is installed on the conveying pipe 82, and the electromagnetic flow valve 83 is electrically connected to an acceleration controller. The acceleration controller is used to control the conveying speed of the material in the cylinder 2. Moreover, the acceleration controller can be controlled manually or automatically by a computer program.

[0042] Therefore, when the feed rate in the feed hopper 21 suddenly increases or the discharge rate in the discharge hopper 22 suddenly decreases, increasing the material conveying resistance inside the cylinder 2, the acceleration controller can control the electromagnetic flow valve 83 to open or increase the flow rate. This causes the wear-resistant large arc plate 61 to spray fluid medium into the inner side of the downstream wear-resistant small arc plate 62 through multiple acceleration nozzles 7 during rotation, thereby accelerating the flow rate of the plastic material along the axial direction of the cylinder 2 and eliminating or preventing blockages. Conversely, when gentle cleaning or energy-saving operation is required, the acceleration controller can control the electromagnetic flow valve 83 to reduce the flow rate or close it, thus achieving dynamic, adjustable, and intelligent control of the material conveying speed.

[0043] Furthermore, in practical use, the dual-cylinder high-power friction cleaner of this application can flexibly adjust the spray pressure and medium type of the acceleration nozzle 7 according to the material characteristics of different waste plastics. For example, for plastics with a lot of oil stains on the surface, a water-air mixture containing a powerful cleaning agent can be used as the spray medium, and the cleaning effect can be enhanced by increasing the spray flow rate; while for some brittle plastics, a lower pressure hot air spray can be used to avoid damaging the plastic while cleaning. At the same time, the acceleration controller can automatically adjust the opening of the electromagnetic flow valve 83 according to the real-time monitoring of the material conditions inside the cylinder 2, such as the material accumulation height and flow rate, to ensure that the entire cleaning process is always in the optimal state, further improving cleaning efficiency and quality.

[0044] In addition, in other feasible embodiments, an electromagnetic pulse valve 84 is further provided on the delivery pipe 82, and the electromagnetic pulse valve 84 is electrically connected to the acceleration controller.

[0045] Therefore, by configuring the electromagnetic pulse valve 84, the opening and closing of the electromagnetic pulse valve 84 can be controlled by the acceleration controller during the cleaning process according to actual needs. This achieves pulsed impact conveying of the material in the conveying pipe 82, maximizing the flow time of the plastic material in the cylinder 2 and ensuring the quality of friction cleaning. Furthermore, this pulsed conveying method enhances the tumbling and friction effect of the plastic material in the cylinder 2. Especially for some firmly adhered impurities, the pulsed impact can more effectively peel them off the plastic surface, further improving the thoroughness of cleaning. Moreover, the acceleration controller can flexibly adjust the pulse frequency and intensity of the electromagnetic pulse valve 84 according to different cleaning stages and material characteristics to achieve the best cleaning effect.

[0046] Furthermore, in another feasible embodiment, a material flow monitoring mechanism is further provided at the discharge hopper 22, and the material flow monitoring mechanism is connected to the acceleration controller. The material flow monitoring mechanism can be a weighing flow meter or an impact flow meter; in this embodiment, a weighing flow meter, such as an electronic belt scale, is selected.

[0047] Therefore, the material flow monitoring mechanism can monitor the flow rate of material at the 22 discharge hoppers in real time and promptly feed the monitored data back to the acceleration controller. After receiving this data, the acceleration controller analyzes and judges it according to the preset program and algorithm, forming a highly intelligent, adaptive, efficient and energy-saving waste plastic friction cleaning system. For example, when the material flow monitoring mechanism detects that the material flow is too large, the acceleration controller will automatically adjust the relevant parameters of the cleaning machine, such as reducing the rotation speed of the main shaft 3 and reducing the spray flow and frequency of the acceleration nozzle 7, to avoid affecting the cleaning effect due to excessive material. When the material flow is detected to be too small, the acceleration controller will correspondingly increase the rotation speed of the main shaft 3 and increase the spray flow and frequency of the acceleration nozzle 7 to ensure that the cleaning machine can operate efficiently and stably, thereby ensuring the continuity and stability of the entire waste plastic recycling and cleaning process.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double cylinder type strong friction cleaning machine for recycling of waste plastic, comprising a base, a cylinder, a feed hopper, a discharge hopper, a main shaft and a plurality of raking blades, characterized in that, Two parallel cylindrical cavities are arranged in the barrel, the two cylindrical cavities are in radial communication and the distance between the central axes of the two cylindrical cavities is greater than the radius of the larger cylindrical cavity and less than the sum of the radii of the two cylindrical cavities; The stirring vanes include large vanes and small vanes, a plurality of the large vanes are distributed in an equidistant circumferential array along the axial direction of the main shaft to form a large stirring group, a plurality of the small vanes are distributed in an equidistant circumferential array along the axial direction of the main shaft to form a small stirring group, and a plurality of the large stirring groups and a plurality of the small stirring groups are arranged alternately along the axial direction of the main shaft; The main shaft is provided with two main shafts, and each of the two main shafts is located on the central axis of the two cylindrical cavities; one large stirring group on one main shaft and an adjacent small stirring group on the other main shaft are located on the same cross section of the barrel, and the two groups form a circulating stirring group; A material guiding channel is arranged in the barrel to guide the material in the upstream circulating stirring group to the downstream circulating stirring group.

2. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 1 wherein, A plurality of wear-resistant plate groups are arranged on the inner wall of the barrel along the axial direction of the barrel, each wear-resistant plate group includes a wear-resistant large arc plate, a wear-resistant small arc plate, a closing arc plate and an expanding arc plate, the wear-resistant large arc plate and the wear-resistant small arc plate are integrally formed to form a friction part, the closing arc plate and the expanding arc plate are integrally formed to form a material guiding part, and a plurality of the friction parts and a plurality of the material guiding parts are connected alternately along the axial direction of the barrel; The wear-resistant large arc plate corresponds to the large stirring group, and the wear-resistant small arc plate corresponds to the small stirring group. The expanding end of the closing arc plate is connected with the end of the adjacent wear-resistant large arc plate, and the closing end is connected with the end of the adjacent wear-resistant small arc plate; the closing end of the expanding arc plate is connected with the end of the adjacent wear-resistant small arc plate, and the expanding end is connected with the end of the adjacent wear-resistant large arc plate.

3. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 2 wherein, The closing arc plate is used to limit the flow of the material in the wear-resistant large arc plate corresponding to the circulating stirring group to the next circulating stirring group, and the expanding arc plate is used to form the material guiding channel.

4. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 2 wherein, The inner diameter of the wear-resistant small arc plate increases along the conveying direction of the material in the barrel.

5. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 1 wherein, The joint part on the upper inner side of the wear-resistant large arc plate and the wear-resistant small arc plate is a flat part, and the joint part on the lower inner side is a pointed end part.

6. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 5 wherein, A gentle arc surface is arranged on the inner arc side of the wear-resistant small arc plate close to the pointed end part, and the curvature radius of the gentle arc surface is greater than the radius of the wear-resistant small arc plate.

7. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in any one of claims 2 to 6 wherein, An accelerating nozzle is arranged on the side of the wear-resistant large arc plate away from the conveying direction of the material, a main pipeline is arranged in the main shaft and communicates with an external medium source, and a branch pipeline is arranged on the wear-resistant large arc plate and used to connect the main pipeline and the accelerating nozzle. The accelerating nozzle is directed to the wear-resistant small arc plate downstream, and the straight-line distance from the accelerating nozzle to the central axis of the corresponding main shaft is less than or equal to the inner diameter of the wear-resistant small arc plate.

8. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 7 wherein, A rotary joint is connected to the end of the main shaft, an inner passage of the rotary joint communicates with the main pipeline, an outer passage of the rotary joint is connected with a conveying pipe which communicates with an external medium source, an electromagnetic flow valve is arranged on the conveying pipe, the electromagnetic flow valve is electrically connected with an accelerating controller, and the accelerating controller is used to control the conveying speed of the material in the barrel.

9. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 8 wherein, An electromagnetic pulse valve is arranged on the conveying pipe, and the electromagnetic pulse valve is electrically connected with the accelerating controller.

10. A double barrelled heavy duty friction washer for recycling of waste plastics as claimed in claim 7 wherein, A material flow monitoring mechanism is arranged at the discharge hopper, and the material flow monitoring mechanism is in control connection with the accelerating controller.

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