A fine pulverization device and method for plastic raw materials

Abstract

The present invention provides a fine crushing device and method for plastic raw materials, belonging to the technical field of plastic crushing devices. It includes an installation support member, on which a crushing part is installed, and two circles of crushing detection parts are installed on the crushing part; the two circles of crushing detection parts are used to crush and tear the plastic raw materials; the crushing part is used to drive the two circles of crushing detection parts to rotate. To solve the problems that in the existing fine crushing device for plastic raw materials, wear is likely to occur during the crushing process, which makes it difficult for the crushing teeth to fit adjacent rollers, affecting the cutting effect and making it inconvenient to realize wear detection and prompt; the present invention adopts crushing detection parts, which can keep continuously performing crushing work and can regularly perform precision detection work to avoid excessive wear of the crushing teeth not being discovered, resulting in affecting the crushing and cutting effect.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic crushing devices, and particularly relates to a fine plastic raw material crushing device and method. Background Art

[0002] In actual plastic recycling work, different plastic raw materials need to be crushed. Usually, a crusher is used for crushing. It mainly performs crushing and tearing work by two rollers with crushing teeth rotating driven by a motor. After classifying and crushing the plastic raw materials, subsequent hot melting and granulation work is carried out. Currently, crushers are widely used due to their advantages such as high crushing efficiency. At present, because the fine plastic raw material crushing device involves miscellaneous crushing raw materials, it is prone to wear during the actual crushing process, resulting in the difficulty for the crushing teeth to fit adjacent rollers, affecting the cutting effect, being inconvenient for realizing wear detection and prompting, and at the same time being inconvenient for automatically removing ferromagnetic metals through comprehensive magnetic separation. Magnetic separation is prone to omission, and it is also inconvenient for automatically classifying and conveying precipitates and floating substances, and the classification and crushing treatment effect is not good. Therefore, this application provides a fine plastic raw material crushing device and method to meet the requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fine plastic raw material crushing device and method to solve the problems that in the existing fine plastic raw material crushing device, wear is prone to occur during the crushing process, resulting in the difficulty for the crushing teeth to fit adjacent rollers, affecting the cutting effect, and being inconvenient for realizing wear detection and prompting.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A fine plastic raw material crushing device includes an installation and support member, a crushing part is installed on the installation and support member, and two circles of crushing detection parts are installed on the crushing part; the two circles of crushing detection parts are used for crushing and tearing plastic raw materials; the crushing part is used to drive the two circles of crushing detection parts to rotate; a magnetic separation part is installed on the installation and support member; the magnetic separation part is located below the two circles of crushing detection parts; a magnetic separation and cleaning part is installed on the installation and support member; the magnetic separation and cleaning part is used for cleaning the magnetic separation part; two rows of flotation and conveying parts are installed on the installation and support member; the heights of the two rows of flotation and conveying parts are different; the two rows of flotation and conveying parts are respectively used for conveying precipitated plastic raw materials and floating plastic raw materials; the installation and support member includes: a crushing box body and a guiding bottom plate, the guiding bottom plate is fixedly installed at the bottom of the crushing box body; the guiding bottom plate is used for guiding precipitated plastic raw materials; the bottom of the crushing box body is used for storing water.

[0006] Optionally, the flotation conveyor further includes conveyor motors respectively and fixedly installed on two rows of material conveying pipes; the output shafts of the two rows of conveyor motors respectively pass through the ends of the two rows of material conveying pipes; material conveying augers are respectively and fixedly installed on the output shafts of the two rows of conveyor motors; mesh holes are respectively provided on the two rows of material conveying augers; the mesh holes on the two rows of material conveying augers are used to filter out moisture; the two rows of material conveying augers are respectively located inside the two rows of material conveying pipes.

[0007] Optionally, the crushing part includes two crushing roller wheels rotatably installed on the crushing box body; a driving motor is fixedly installed on the side of the crushing box body; the output shaft of the driving motor is connected to the end of the front crushing roller wheel; gears are respectively and fixedly installed at the end parts of the two crushing roller wheels, and the two gears are meshed with each other; the two crushing roller wheels are arranged in parallel.

[0008] Optionally, the magnetic separation part includes a separation push plate slidably installed on the crushing box body, and the separation push plate is aligned with the scraping plate; cam control plates are respectively and fixedly installed at both ends of the separation push plate; the two cam control plates are respectively attached to both sides of the crushing box body; the two cam control plates are respectively attached to the two cams.

[0009] Optionally, the installation support part further includes two support rods fixedly installed at the bottom of the crushing box body; a scraping plate is fixedly installed on the side of the crushing box body; the scraping plate is used to scrape the magnetic separation part; a guiding plate is fixedly installed inside the crushing box body; a magnetic separation diversion plate is fixedly installed inside the crushing box body; the guiding plate and the magnetic separation diversion plate are arranged oppositely; an alarm control lamp is fixedly installed on the side of the crushing box body; the crushing box body is used to prompt the wear of the crushing detection part.

[0010] Optionally, the flotation conveyor includes two rows of material conveying pipes fixedly installed on the crushing box body; discharge holes are respectively formed in the two rows of material conveying pipes; the heights of the two rows of material conveying pipes are different; the lower row of material conveying pipes is used to convey sediment; the upper row of material conveying pipes is used to convey floating objects; the two rows of material conveying pipes are obliquely installed on the crushing box body.

[0011] Optionally, the crushing detection part includes two circles of crushing sliding blocks slidably inserted on the two crushing roller wheels; a row of crushing teeth are respectively and fixedly installed on the two circles of crushing sliding blocks; the crushing teeth on the two circles of crushing sliding blocks are axially misaligned; a row of sliding guiding shafts are respectively and slidably installed on the two circles of crushing sliding blocks, and the end parts of the sliding guiding shafts are respectively and fixedly installed on the two crushing roller wheels; limiting springs are respectively sleeved on the outer parts of the sliding guiding shafts installed on the two crushing roller wheels, and each limiting spring is respectively connected between the crushing roller wheel and the crushing sliding block; micro switches are respectively and fixedly installed on the inner sides of the two circles of crushing sliding blocks; the two micro switches are respectively electrically connected to the alarm control lamp, and a row of lamp beads respectively electrically connected to the two circles of micro switches are arranged inside the alarm control lamp.

[0012] Optionally, the magnetic separation member further includes two tension springs fixedly installed on both sides of the crushing box body; the top parts of the two tension springs are respectively fixedly connected to the side surface of the cam control plate; the two tension springs are used to pull the two cam control plates to adhere to the cam; the separation push plate is used to scrape the iron metal impurities on the scraping plate.

[0013] Optionally, the magnetic separation member includes a magnetic separation roller rotatably installed on the crushing box body, and a magnetic separation motor is fixedly installed on the crushing box body through a bracket; the output shaft of the magnetic separation motor is fixedly installed at the end of the magnetic separation roller; cams are respectively fixedly installed at both ends of the magnetic separation roller; the two cams are respectively located on both sides of the crushing box body; a row of electromagnets are fixedly installed inside the magnetic separation roller; the row of electromagnets are used to magnetically attract the iron metal impurities in the plastic raw materials; the magnetic separation roller is attached to the scraping plate.

[0014] The present application also provides a method for finely crushing plastic raw materials, including the following steps:

[0015] 1), The driving motor drives the two driving crushing rollers to rotate, and the plastic raw materials are crushed by the crushing teeth. When it is detected that the crushing teeth are worn, the two crushing rollers are controlled to rotate at a low speed. When the crushing teeth are severely worn after long-term use, the micro switch no longer presses the crushing rollers. At this time, the corresponding alarm control lamp can be controlled to turn off the internal lamp beads for prompt.

[0016] 2), The crushed materials and the contained iron metal impurities after being crushed by the crushing teeth fall on the guide plate and the magnetic separation diversion plate together. The electromagnet magnetically attracts the iron impurities. As the magnetic separation roller rotates, it drives the cam to squeeze and control the separation push plate to lift and scrape the iron impurities on the scraping plate for cleaning.

[0017] 3), The conveying motor drives the feeding auger to rotate. The upper feeding auger conveys the floating particles, and the lower feeding auger conveys the precipitated plastic particles.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above solution, by using the crushing detection member, continuous crushing work can be maintained, and at the same time, precision detection work can be carried out regularly, avoiding the situation that the excessive wear of the crushing teeth is not discovered, which may affect the crushing and cutting effect. It can be more suitable for the crushing work of plastics with higher toughness, ensuring the crushing effect. At the same time, the structure of this solution uses the crushing detection member for detection, which does not affect the structural strength of the crushing detection member during normal crushing.

[0020] By adopting a magnetic separation component, efficient magnetic separation work can be carried out, and impurities such as iron metal wire in plastic raw materials can be sorted to ensure the crushing quality. By using the magnetic separation component, automatic impurity separation work is realized, avoiding impurities being magnetically adsorbed on the outside of the magnetic separation roller all the time, and at the same time not affecting the continuous magnetic separation work of the magnetic separation roller. The adopted magnetic separation roller uses a row of electromagnets to ensure the comprehensiveness of magnetic separation.

[0021] By adopting a flotation conveying component, the conveying and discharging work of plastic crushed particles can be continuously carried out. At the same time, by using the flotation conveying component, the moisture in plastic particles can be filtered out, and the precipitation particles and floating particles in plastic particles can be independently conveyed, which is more applicable to the actual plastic raw material crushing work, classifying and sorting different raw materials, and is more applicable to the sorting of plastic raw materials with different densities. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0023] Figure 1 It is a schematic three-dimensional structure diagram of a fine plastic raw material crushing device;

[0024] Figure 2 It is a schematic three-dimensional rear structure diagram of a fine plastic raw material crushing device;

[0025] Figure 3 It is a cross-sectional view of the internal structure of a fine plastic raw material crushing device;

[0026] Figure 4 It is a schematic enlarged three-dimensional structure diagram of the installation support member;

[0027] Figure 5 For Figure 3 The enlarged structure diagram of area C in

[0028] Figure 6 It is a schematic enlarged three-dimensional structure diagram of the crushing part;

[0029] Figure 7 It is a cross-sectional view of the crushing detection member;

[0030] Figure 8 For Figure 7 The enlarged structure diagram of area E in

[0031] Figure 9 It is a schematic enlarged three-dimensional structure diagram of the magnetic separation member;

[0032] Figure 10 It is a schematic enlarged three-dimensional structure diagram of the magnetic separation component;

[0033] Figure 11 Schematic diagram of the three-dimensional enlarged structure of the flotation conveyor

[0034] Figure 12 is Figure 5 Enlarged view of the structure of area F in

[0035] Reference numerals

[0036] 1. Installation support; 101. Crushing box; 1011. Guide bottom plate; 102. Support rod; 103. Scraper; 104. Guide plate; 105. Magnetic separation guide plate; 106. Alarm control lamp; 2. Crushing part; 201. Crushing roller; 202. Driving motor; 203. Gear; 3. Crushing detection part; 301. Crushing slider; 3011. Crushing teeth; 302. Sliding guide shaft; 303. Limit spring; 304. Microswitch; 4. Magnetic separation part; 401. Magnetic separation roller; 402. Magnetic separation motor; 403. Cam; 404. Electromagnet; 5. Magnetic separation and separation part; 501. Separation propulsion plate; 502. Cam control plate; 503. Tension spring; 6. Flotation conveyor; 601. Feed pipe; 602. Discharge hole; 603. Conveyor motor; 604. Feed auger.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0038] The following describes in detail a plastic raw material fine crushing device and method provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0039] It should be pointed out that in the specification, "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment necessarily includes the specific features, structures or characteristics. In addition, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0040] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather can alternatively, depending at least in part on the context, allow for the presence of other factors that may not be explicitly described.

[0041] It is to be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0042] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device may be oriented in other ways, and the spatial relative descriptors used herein may be similarly interpreted accordingly.

[0043] As Figures 1 to 12 shown, an embodiment of the present invention provides a fine crushing device for plastic raw materials, including a mounting support member 1, a crushing part 2 is mounted on the mounting support member 1, and two circles of crushing detection members 3 are mounted on the crushing part 2; the two circles of crushing detection members 3 are used for crushing and shredding plastic raw materials; the crushing part 2 is used for driving the two circles of crushing detection members 3 to rotate; a magnetic separation member 4 is mounted on the mounting support member 1; the magnetic separation member 4 is located below the two circles of crushing detection members 3; a magnetic separation and cleaning member 5 is mounted on the mounting support member 1; the magnetic separation and cleaning member 5 is used for cleaning the magnetic separation member 4; two rows of flotation conveying members 6 are mounted on the mounting support member 1; the two rows of flotation conveying members 6 are of different heights; the two rows of flotation conveying members 6 are respectively used for conveying precipitated plastic raw materials and floating plastic raw materials; the mounting support member 1 includes: a crushing box body 101 and a guiding bottom plate 1011, the guiding bottom plate 1011 is fixedly mounted at the bottom of the crushing box body 101; the guiding bottom plate 1011 is used for guiding precipitated plastic raw materials; the bottom of the crushing box body 101 is used for storing water.

[0044] As Figures 3 to 8As shown, the installation support 1 further includes two support rods 102 fixedly installed at the bottom of the crushing box body 101; a scraping plate 103 is fixedly installed on the side of the crushing box body 101; the scraping plate 103 is used to scrape the magnetic separation component 4; a guiding plate 104 is fixedly installed inside the crushing box body 101; a magnetic separation guiding plate 105 is fixedly installed inside the crushing box body 101; the guiding plate 104 and the magnetic separation guiding plate 105 are arranged opposite to each other; an alarm control lamp 106 is fixedly installed on the side of the crushing box body 101; the crushing box body 101 is used to prompt the wear of the crushing detection component 3; the crushing part 2 includes two crushing roller wheels 201 rotatably installed on the crushing box body 101; a driving motor 202 is fixedly installed on the side of the crushing box body 101; the output shaft of the driving motor 202 is connected to the end of the front crushing roller wheel 201; gears 203 are respectively fixedly installed at the ends of the two crushing roller wheels 201, and the two gears 203 are meshed with each other; the two crushing roller wheels 201 are arranged in parallel; the crushing detection component 3 includes two circles of crushing sliding blocks 301 slidably inserted on the two crushing roller wheels 201.

[0045] A row of crushing teeth 3011 are respectively and fixedly installed on two circles of crushing sliding blocks 301; the crushing teeth 3011 on the two circles of crushing sliding blocks 301 are axially offset; a row of sliding guide shafts 302 are respectively and slidably installed on the two circles of crushing sliding blocks 301, and the end parts of the sliding guide shafts 302 are respectively and fixedly installed on two crushing rollers 201; limiting springs 303 are respectively sleeved outside the sliding guide shafts 302 installed on the two crushing rollers 201, and each limiting spring 303 is respectively connected between the crushing roller 201 and the crushing sliding block 301; microswitches 304 are respectively and fixedly installed on the inner sides of the two circles of crushing sliding blocks 301; the two circles of microswitches 304 are respectively electrically connected to an alarm control lamp 106, and a row of lamp beads respectively electrically connected to the two circles of microswitches 304 are arranged inside the alarm control lamp 106. By adopting a crushing detection member 3, the continuous crushing work of this structure can be maintained, and the precision detection work can be carried out regularly, so as to avoid the situation that the excessive wear of the crushing teeth 3011 is not discovered, resulting in the influence on the crushing and cutting effect. This structure is more suitable for the crushing work of plastics with relatively high toughness, can ensure the crushing effect, and at the same time, this structure adopts the detection method of the microswitch 304, which does not affect the structural strength of the crushing detection member 3 during normal crushing, and the structure is more reasonable. The adopted crushing part 2 can crush efficiently, and when wear occurs, the alarm control lamp 106 can give an alarm prompt in time, ensuring that when the crushing teeth 3011 are performing crushing work under normal use conditions, they should squeeze and fit the surface of the crushing roller 201 at the interval of the crushing teeth 3011. During detection, the crushing roller 201 is driven to rotate at a low speed. At this time, each row of crushing teeth 3011 rotates in turn. When the crushing teeth 3011 are worn, when the crushing teeth 3011 rotate to the side of the crushing roller 201, under the extrusion of the limiting spring 303, the crushing sliding block 301 will be driven to move outwards to keep the crushing teeth 3011 attached to the crushing roller 201. At this time, because the overall crushing teeth 3011 are severely worn, the microswitch 304 no longer presses the crushing roller 201, and at this time, the lamp beads inside the corresponding alarm control lamp 106 can be controlled to go out for prompting; the guide bottom plate 1011 can promote the precipitation of broken material particles to gather at the bottom of the flotation conveyor 6, facilitating the transportation of the flotation conveyor 6.

[0046] As Figure 4 , Figure 9 and Figure 10As shown in the figure, the magnetic separation component 4 includes a magnetic separation roller 401 rotatably installed on the crushing box body 101, and a magnetic separation motor 402 is fixedly installed on the crushing box body 101 through a bracket; the output shaft of the magnetic separation motor 402 is fixedly installed at the end of the magnetic separation roller 401; cams 403 are fixedly installed at both ends of the magnetic separation roller 401; the two cams 403 are respectively located on both sides of the crushing box body 101; a row of electromagnets 404 are fixedly installed inside the magnetic separation roller 401; the row of electromagnets 404 are used to magnetically attract iron metal impurities in the plastic raw materials; the magnetic separation roller 401 is attached to the scraping plate 103; the magnetic separation and separation component 5 includes a separation push plate 501 slidably installed on the crushing box body 101, and the separation push plate 501 is aligned with the scraping plate 103; cam control plates 502 are fixedly installed at both ends of the separation push plate 501; the two cam control plates 502 are respectively attached to both sides of the crushing box body 101; the two cam control plates 502 are respectively attached to the two cams 403; the magnetic separation and separation component 5 further includes two tension springs 503 fixedly installed on both sides of the crushing box body 101; the tops of the two tension springs 503 are respectively fixedly connected to the sides of the cam control plates 502; the two tension springs 503 are used to pull the two cam control plates 502 to be attached to the cams 403; the separation push plate 501 is used to scrape the iron metal impurities on the scraping plate 103. The magnetic separation and separation component 5 can be used for magnetic separation work, and can sort out impurities such as iron metal wires in the plastic raw materials to ensure the crushing quality. By using the magnetic separation and separation component 5, automatic impurity separation work can be realized, avoiding impurities from being magnetically attracted to the outside of the magnetic separation roller 401 all the time. The magnetic separation roller 401 adopted ensures the comprehensiveness of magnetic separation by using a row of electromagnets 404. The separation push plate 501 can be automatically lifted and lowered to scrape impurities such as iron metal wires, ensuring the sustainable usability of the magnetic separation roller 401. The iron impurities are magnetically attracted by a row of electromagnets 404 inside the magnetic separation roller 401. At this time, as the magnetic separation motor 402 drives the magnetic separation roller 401, the iron impurities are driven to rotate, and then can be scraped by the scraping plate 103. As the magnetic separation roller 401 rotates, the cam 403 drives to squeeze the cam control plate 502. At this time, the cam control plate 502 can drive the separation push plate 501 to lift and lower, and scrape and push the iron impurities on the scraping plate 103 for cleaning work.

[0047] As Figure 4 , Figure 11 , Figure 12As shown in the figure, the flotation conveyor 6 includes two rows of feeding pipes 601 fixedly installed on the crushing box body 101; discharging holes 602 are respectively formed in the two rows of feeding pipes 601; the two rows of feeding pipes 601 are of different heights; the lower row of feeding pipes 601 is used for conveying precipitates; the upper row of feeding pipes 601 is used for conveying floating substances; the two rows of feeding pipes 601 are obliquely installed on the crushing box body 101; the flotation conveyor 6 further includes conveying motors 603 respectively fixedly installed on the two rows of feeding pipes 601; the output shafts of the two rows of conveying motors 603 respectively pass through the ends of the two rows of feeding pipes 601; feeding augers 604 are respectively fixedly installed on the output shafts of the two rows of conveying motors 603; mesh holes are respectively provided on the two rows of feeding augers 604; the mesh holes on the two rows of feeding augers 604 are used for filtering out moisture; the two rows of feeding augers 604 are respectively located inside the two rows of feeding pipes 601. By using the flotation conveyor 6, the conveying and discharging work of plastic crushing particles can be continuously carried out. At the same time, by using the flotation conveyor 6, the moisture in the plastic particles can be filtered out, and the precipitation particles and floating particles in the plastic particles can be independently conveyed, which can be more suitable for the actual plastic raw material crushing work and classify and separate different raw materials; the raw material particles fall on the crushing box body 101, and at this time, the moisture inside the crushing box body 101 can float the plastics with low density on the water surface.

[0048] The present application also provides a method for finely crushing plastic raw materials, including the following steps:

[0049] 1), The driving motor 202 drives the two driving crushing rollers 201 to rotate, and the plastic raw materials are crushed by the crushing teeth 3011. When it is detected that the crushing teeth 3011 are worn, the two crushing rollers 201 are controlled to rotate at a low speed. When the crushing teeth 3011 are severely worn after long-term use, the microswitch 304 no longer presses the crushing roller 201. At this time, the lamp beads inside the corresponding alarm control lamp 106 can be controlled to go out for prompt;

[0050] 2), The crushed materials and the iron metal impurities contained after being crushed by the crushing teeth 3011 together fall on the guide plate 104 and the magnetic separation guide plate 105. The electromagnet 404 magnetically attracts the iron impurities. As the magnetic separation roller 401 rotates, the cam 403 is driven to squeeze and control the separation and propulsion plate 501 to lift and scrape the iron impurities on the propulsion scraping plate 103 for cleaning;

[0051] 3), The conveying motor 603 drives the feeding auger 604 to rotate. The upper feeding auger 604 conveys floating particles, and the lower feeding auger 604 conveys precipitated plastic particles.

[0052] The working principle provided by the present invention is as follows. First, the crushing box 101 is placed on the ground, and water is stored at the bottom of the crushing box 101. The plastic raw materials are placed between the two crushing rollers 201. Driven by the driving motor 202 and engaged and driven by the gears 203, the crushing work can be carried out through the crushing teeth 3011 at this time. The crushed plastic particles fall to the bottom of the crushing box 101 for sorting. When detecting the wear degree of the crushing teeth 3011, the crushing roller 201 is driven to rotate at a low speed. At this time, each row of crushing teeth 3011 rotates in turn. When the crushing teeth 3011 are worn, when the crushing teeth 3011 rotate to the side of the crushing roller 201, under the extrusion of the limiting spring 303, it will drive the crushing sliding block 301 to move outwards, keeping the crushing teeth 3011 attached to the crushing roller 201. At this time, because the crushing teeth 3011 are worn significantly as a whole, the microswitch 304 no longer presses the crushing roller 201 at this time. At this time, the corresponding alarm control lamp 106 can be controlled to turn off the internal lamp beads for prompting. Correspondingly, if the overall wear degree of the crushing teeth 3011 meets the standard.

[0053] When the crushing teeth 3011 rotate to the position attached to the crushing roller 201, the microswitch 304 will be pressed. At this time, the alarm control lamp 106 can remain lit. Each internal lamp bead of the alarm control lamp 106 adopted is controlled by the microswitch 304. The guiding bottom plate 1011 can promote the precipitation of broken material particles to gather at the bottom of the flotation conveyor 6; the broken materials and the contained iron metal impurities after being crushed by the crushing teeth 3011 fall on the guiding plate 104 and the magnetic separation guiding plate 105 together, and are guided to one side of the magnetic separation roller 401 through the guiding plate 104 and the magnetic separation guiding plate 105. The iron impurities are magnetically attracted by a row of electromagnets 404 inside the magnetic separation roller 401, and the plastic particles will continue to fall to the bottom of the crushing box 101. At this time, as the magnetic separation motor 402 drives the magnetic separation roller 401 to drive the iron impurities to rotate, they can be scraped by the scraping plate 103. However, under the magnetic attraction of the electromagnet 404 at this time, the iron impurities will not fall immediately, but gather on the top of the scraping plate 103. At this time, as the magnetic separation roller 401 rotates, it drives the cam 403 to press the cam control plate 502. At this time, the cam control plate 502 can drive the separation and propulsion plate 501 to lift and lower. At this time, the separation and propulsion plate 501 can move downwards to scrape and push the iron impurities on the scraping plate 103. At this time, the iron impurities are pushed downwards. As the iron impurities are continuously pushed downwards, they are no longer magnetically attracted by the electromagnet 404, and the cleaning work can be realized, which is convenient for the scraping plate 103 to continuously clean the magnetic separation roller 401.

[0054] The conveying motor 603 drives the material conveying auger 604 to rotate. At this time, the upper material conveying auger 604 conveys floating particles, which are discharged through the upper discharge hole 602. The precipitated plastic particles are conveyed by the lower material conveying auger 604, so that the precipitated plastics can be independently conveyed and discharged through the discharge hole 602 on the lower material conveying pipe 601. Conveyor belts can be provided below the discharge holes 602 on both layers for conveying respectively.

[0055] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, well-known methods, processes, procedures, components and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A plastic raw material fine grinding device, comprising a mounting support, on which a grinding unit is mounted, characterized in that: The crushing part is equipped with two circles of crushing detection parts; the two circles of crushing detection parts are used to crush and shred the plastic raw materials; the crushing part is used to drive the two circles of crushing detection parts to rotate; A magnetic selector is installed on the mounting support; the magnetic selector is located below the two circles of crushing detection components; A magnetic separation component is installed on the mounting support; the magnetic separation component is used to clean the magnetic separation component; Two rows of flotation conveying members are installed on the mounting support; The two rows of flotation conveying members have different heights; the two rows of flotation conveying members are used to convey the precipitated plastic raw materials and the floating plastic raw materials respectively; The mounting support comprises: a crushing box and a guide bottom plate, wherein the guide bottom plate is fixedly mounted on the bottom of the crushing box; the guide bottom plate is used to guide the precipitated plastic raw materials; The bottom of the crushing box is used for storing water; The magnetic separation part comprises a magnetic separation roller rotatably mounted on a pulverizing box, a magnetic separation motor is fixedly mounted on the pulverizing box through a bracket; the output shaft of the magnetic separation motor is fixedly mounted on the end of the magnetic separation roller; cams are fixedly mounted on both ends of the magnetic separation roller; two cams are respectively located on both sides of the pulverizing box; a row of electromagnets is fixedly mounted inside the magnetic separation roller; the row of electromagnets is used to magnetically absorb iron metal impurities in the plastic raw materials; the magnetic separation roller is attached to the scraper plate; The magnetic separation member comprises a separation push plate slidably mounted on the crushing box, the separation push plate is aligned with the scraping plate; cam control plates are fixedly mounted on both ends of the separation push plate; two cam control plates are respectively attached to both sides of the crushing box; and two cam control plates are respectively attached to two cams; The magnetic separation component also includes two tension springs fixedly installed on both sides of the crushing box; the tops of the two tension springs are respectively fixedly connected to the sides of the cam control plate; the two tension springs are used to pull the two cam control plates to stick to the cam; the separation push plate is used to scrape off the iron metal impurities on the scraping plate.

2. The plastic raw material fine grinding device according to claim 1, characterized in that: The mounting support also includes two support rods fixedly installed at the bottom of the crushing box; a scraper plate is fixedly installed on the side of the crushing box; the scraper plate is used to scrape the magnetic separation part; a guide plate is fixedly installed inside the crushing box; a magnetic separation guide plate is fixedly installed inside the crushing box; the guide plate and the magnetic separation guide plate are arranged opposite to each other; an alarm control light is fixedly installed on the side of the crushing box; the crushing box is used to indicate the wear of the crushing detection part.

3. The plastic raw material fine grinding device according to claim 1, characterized in that: The crushing part includes two crushing rollers rotatably mounted on a crushing box; a driving motor is fixedly mounted on the side of the crushing box; the output shaft of the driving motor is connected to the front end of the crushing roller; gears are fixedly mounted on the ends of the two crushing rollers, respectively, and the two gears are meshed; the two crushing rollers are arranged in parallel.

4. The plastic raw material fine grinding device according to claim 3, characterized in that: The crushing detection component includes two circles of crushing sliding blocks slidably inserted on the two crushing rollers; a row of crushing teeth are fixedly installed on the two circles of the crushing sliding blocks; the crushing teeth on the two circles of the crushing sliding blocks are axially staggered; a row of sliding guide shafts are slidably installed on the two circles of the crushing sliding blocks, and the ends of the sliding guide shafts are fixedly installed on the two crushing rollers; the outsides of the sliding guide shafts installed on the two crushing rollers are respectively sleeved with limit springs, and each limit spring is respectively connected between the crushing roller and the crushing sliding block; micro switches are fixedly installed on the inner sides of the two circles of the crushing sliding blocks; the two circles of the micro switches are electrically connected to the alarm control lights, and a row of lamp beads electrically connected to the two circles of micro switches are arranged inside the alarm control lights.

5. The plastic raw material fine grinding device according to claim 1, characterized in that: The flotation conveying element includes two rows of conveying pipes fixedly installed on the crushing box; the two rows of conveying pipes are respectively provided with discharge holes; the two rows of conveying pipes are at different heights; the lower row of conveying pipes is used to convey sediment; the upper row of conveying pipes is used to convey floating objects; the two rows of conveying pipes are installed obliquely on the crushing box.

6. The plastic raw material fine grinding device according to claim 1, characterized in that: The flotation conveying element also includes conveying motors fixedly installed on two rows of conveying pipes; the output shafts of the two rows of conveying motors pass through the ends of the two rows of conveying pipes respectively; conveying augers are fixedly installed on the output shafts of the two rows of conveying motors; mesh holes are respectively provided on the two rows of conveying augers; the mesh holes on the two rows of conveying augers are used to filter out moisture; the two rows of conveying augers are respectively located inside the two rows of conveying pipes.

7. A method for finely pulverizing plastic raw materials, using a plastic raw material finely pulverizing device as claimed in any one of claims 1 to 6, characterized in that: The steps include: 1) The driving motor drives the two driving crushing rollers to rotate, and the crushing teeth crush the plastic raw materials; when the crushing teeth are detected to be worn, the two crushing rollers are controlled to rotate at a low speed. When the crushing teeth are worn out after long-term use, the micro switch will no longer squeeze the crushing rollers, and the corresponding alarm control lamp can be controlled to turn off the internal lamp bead to give a prompt; 2) The crushed materials and the iron metal impurities contained in the crushing teeth fall together on the guide plate and the magnetic separation guide plate. The electromagnet magnetically attracts the iron impurities. As the magnetic separation roller rotates, the cam squeezes and controls the separation push plate to rise and fall, scraping the iron impurities on the push scraper plate to clean them; 3) The conveying motor drives the conveying auger to rotate. The upper conveying auger conveys floating particles, and the lower conveying auger conveys settled plastic particles.

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