Plastic raw material fine crushing device and method

Abstract

The invention provides a plastic raw material fine crushing device and method, and belongs to the technical field of plastic crushing devices. Comprising a mounting supporting piece, a crushing part is mounted on the mounting supporting piece, and two circles of crushing detection pieces are mounted on the crushing part; the two circles of crushing detection pieces are used for crushing and shredding plastic raw materials; and the crushing part is used for driving the two circles of crushing detection pieces to rotate. The plastic raw material fine crushing device solves the problems that an existing plastic raw material fine crushing device is prone to abrasion in the crushing process, crushing teeth are difficult to attach to adjacent rollers, the cutting effect is affected, and abrasion detection prompting is inconvenient to achieve. The crushing detection part is adopted, continuous crushing work can be kept, meanwhile, precision detection work can be conducted regularly, and the situation that crushing teeth are excessively abraded and cannot be found, and consequently the crushing and cutting-off effect is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plastic crushing devices, and in particular to a device and method for finely crushing plastic raw materials. Background Art

[0002] In actual plastic recycling work, different plastic raw materials need to be crushed and processed, and a crusher is usually used for the crushing work. It mainly crushes and tears the plastic raw materials through two rollers with crushing teeth driven by a motor. The plastic raw materials are crushed and classified before subsequent hot melt granulation and other work. The current crusher is widely used due to its advantages such as high crushing efficiency. The current plastic raw material fine crushing device involves more mixed crushing raw materials, which are prone to wear in the actual crushing process, making it difficult for the crushing teeth to fit adjacent rollers, affecting the cutting effect, and making it difficult to implement wear detection prompts. At the same time, it is not convenient to automatically carry out comprehensive magnetic separation to remove iron metals, and magnetic separation is easy to miss. It is also not convenient to automatically classify and transport sediments and floating objects, and the graded crushing treatment effect is not good. Therefore, the present application provides a plastic raw material fine crushing device and method to meet the needs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a plastic raw material fine grinding device and method to solve the problem that the existing plastic raw material fine grinding device is prone to wear during the grinding process, which makes it difficult for the grinding teeth to fit the adjacent rollers, affects the cutting effect, and is not convenient for realizing wear detection prompts.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A plastic raw material fine crushing device comprises a mounting support, a crushing part is mounted on the mounting support, two circles of crushing detection parts are mounted on the crushing part; the two circles of crushing detection parts are used to crush and shred plastic raw materials; the crushing part is used to drive the two circles of crushing detection parts to rotate; a magnetic separation part is mounted on the mounting support; the magnetic separation part is located below the two circles of crushing detection parts; a magnetic separation part is mounted on the mounting support; the magnetic separation part is used to clean the magnetic separation part; two rows of flotation conveying parts are mounted on the mounting support; the two rows of flotation conveying parts have different heights; the two rows of flotation conveying parts are used to transport precipitated plastic raw materials and floating plastic raw materials respectively; the mounting support comprises: a crushing box and a guide bottom plate, 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 to store water.

[0006] Optionally, the flotation conveying element also includes conveying motors fixedly mounted 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 mounted 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.

[0007] Optionally, 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 respectively fixedly mounted on the ends of the two crushing rollers, and the two gears are meshed; the two crushing rollers are arranged in parallel.

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

[0009] Optionally, the mounting support also includes two support rods fixedly mounted on the bottom of the crushing box; a scraper plate is fixedly mounted on the side of the crushing box; the scraper plate is used to scrape the magnetic separation part; a guide plate is fixedly mounted inside the crushing box; a magnetic separation guide plate is fixedly mounted 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 mounted on the side of the crushing box; the crushing box is used to indicate the wear of the crushing detection part.

[0010] Optionally, 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.

[0011] Optionally, 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 provided inside the alarm control lights.

[0012] Optionally, 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.

[0013] Optionally, the magnetic separation component includes a magnetic separation roller rotatably mounted on a crushing box, on which a magnetic separation motor is fixedly mounted via 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 at both ends of the magnetic separation roller; the two cams are respectively located on both sides of the crushing box; a row of electromagnets is fixedly mounted inside the magnetic separation roller; a row of electromagnets is used to magnetically absorb ferrous metal impurities in plastic raw materials; the magnetic separation roller is attached to a scraper plate.

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

[0015] 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. At this time, the internal lamp beads of the corresponding alarm control lamp can be controlled to go out to prompt;

[0016] 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;

[0017] 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.

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

[0019] In the above scheme, the crushing detection part is used to maintain continuous crushing work, and precision detection work can be carried out regularly to avoid excessive wear of the crushing teeth without being discovered, which affects the crushing and cutting effect. It can be more suitable for crushing plastic, a material with higher toughness, and can ensure the crushing effect. At the same time, this structure adopts the method of crushing detection part detection, which does not affect the structural strength of the crushing detection part during normal crushing.

[0020] By adopting magnetic separation parts, efficient magnetic separation can be carried out, and impurities such as iron metal wire in plastic raw materials can be separated to ensure the crushing quality. Magnetic separation parts can be used to realize automatic impurity separation to prevent impurities from being magnetically attracted to the outside of the magnetic separation roller. At the same time, it does not affect the uninterrupted magnetic separation of the magnetic separation roller. The magnetic separation roller used uses a row of electromagnets to ensure the comprehensiveness of the magnetic separation.

[0021] By adopting flotation conveying parts, the plastic crushed particles can be continuously conveyed and discharged. At the same time, the flotation conveying parts can filter out the moisture in the plastic particles, and independently convey the precipitated particles and floating particles in the plastic particles. It can be more suitable for the actual plastic raw material crushing work, and is more suitable for the classification and sorting of different raw materials, and is more suitable for the sorting of plastic raw materials with different densities. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

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

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

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

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

[0027] Figure 5 for Figure 3 A magnified view of the structure of the middle C region;

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

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

[0030] Figure 8 for Figure 7 A magnified view of the structure of the middle E region;

[0031] Fig. 9 It is a three-dimensional enlarged structural diagram of the magnetic selection component;

[0032] Fig.10 It is a three-dimensional enlarged structural schematic diagram of the magnetic separation component;

[0033] Fig.11 It is a three-dimensional enlarged structural diagram of the flotation conveying component;

[0034] Fig.12 for Figure 5 A magnified view of the structure of the middle F region.

[0035] Reference numerals

[0036] 1. Install the support; 101. Crushing box; 1011. Guide bottom plate; 102. Support rod; 103. Scraping plate; 104. Guide plate; 105. Magnetic separation guide plate; 106. Alarm control light; 2. Crushing part; 201. Crushing roller; 202. Driving motor; 203. Gear; 3. Crushing detection part; 301. Crushing sliding block; 3011. Crushing teeth; 302. Sliding guide shaft; 303. Limit spring; 304. Micro switch; 4. Magnetic separation part; 401. Magnetic separation roller; 402. Magnetic separation motor; 403. Cam; 404. Electromagnet; 5. Magnetic separation separation part; 501. Separation push plate; 502. Cam control plate; 503. Tension spring; 6. Floatation conveying part; 601. Feed pipe; 602. Discharge hole; 603. Conveying motor; 604. Feeding auger.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following is a detailed description of a plastic raw material fine grinding device and method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; 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 noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, a term can be understood, at least in part, from its 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 the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0043] like Figures 1 to 12 As shown, an embodiment of the present invention provides a plastic raw material fine grinding device, including a mounting support 1, a grinding part 2 is mounted on the mounting support 1, and two circles of grinding detection parts 3 are mounted on the grinding part 2; the two circles of grinding detection parts 3 are used to grind and shred the plastic raw materials; the grinding part 2 is used to drive the two circles of grinding detection parts 3 to rotate; a magnetic separator 4 is mounted on the mounting support 1; the magnetic separator 4 is located below the two circles of grinding detection parts 3; a magnetic separation part 5 is mounted on the mounting support 1; the magnetic separation part 5 is used to clean the magnetic separator 4; two rows of flotation conveying parts 6 are mounted on the mounting support 1; the two rows of flotation conveying parts 6 have different heights; the two rows of flotation conveying parts 6 are used to transport precipitated plastic raw materials and floating plastic raw materials respectively; the mounting support 1 includes: a grinding box 101 and a guide bottom plate 1011, the guide bottom plate 1011 is fixedly mounted on the bottom of the grinding box 101; the guide bottom plate 1011 is used to guide the precipitated plastic raw materials; the bottom of the grinding box 101 is used to store water.

[0044] like Figures 3 to 8As shown, the mounting support 1 also includes two support rods 102 fixedly mounted at the bottom of the crushing box 101; a scraper plate 103 is fixedly mounted on the side of the crushing box 101; the scraper plate 103 is used to scrape the magnetic separation element 4; a guide plate 104 is fixedly mounted inside the crushing box 101; a magnetic separation guide plate 105 is fixedly mounted inside the crushing box 101; the guide plate 104 and the magnetic separation guide plate 105 are arranged opposite to each other; an alarm control light 106 is fixedly mounted on the side of the crushing box 101; the crushing box 101 is used to prompt The crushing detection member 3 is worn; the crushing part 2 includes two crushing rollers 201 rotatably mounted on the crushing box 101; a driving motor 202 is fixedly mounted on the side of the crushing box 101; the output shaft of the driving motor 202 is connected to the front end of the crushing roller 201; gears 203 are fixedly mounted on the ends of the two crushing rollers 201, and the two gears 203 are meshed; the two crushing rollers 201 are arranged in parallel; the crushing detection member 3 includes two circles of crushing sliding blocks 301 slidably inserted on the two crushing rollers 201.

[0045] A row of crushing teeth 3011 is fixedly mounted on the two circles of crushing sliding blocks 301; the crushing teeth 3011 on the two circles of crushing sliding blocks 301 are axially staggered; a row of sliding guide shafts 302 are slidably mounted on the two circles of crushing sliding blocks 301, and the ends of the sliding guide shafts 302 are fixedly mounted on the two crushing rollers 201; the outsides of the sliding guide shafts 302 mounted on the two crushing rollers 201 are respectively sleeved with limit springs 303, and each limit spring 303 is respectively connected between the crushing roller 201 and the crushing sliding block 301; the two circles of crushing Micro switches 304 are fixedly installed on the inner side of the crushing sliding block 301; two circles of micro switches 304 are electrically connected to the alarm control light 106, and a row of lamp beads electrically connected to the two circles of micro switches 304 are arranged inside the alarm control light 106. The crushing detection part 3 is adopted to keep the structure in continuous crushing work, and the precision detection work can be carried out regularly to avoid excessive wear of the crushing teeth 3011 without being discovered, which affects the crushing and cutting effect. The present structure can be more suitable for the crushing of plastic, a material with higher toughness, and can ensure the crushing The structure adopts the micro switch 304 detection mode, which does not affect the structural strength of the crushing detection part 3 during normal crushing, and the structure is more reasonable. The crushing part 2 can be crushed efficiently, and the alarm control light 106 can be used to give an alarm prompt in time when wear occurs, ensuring that the crushing teeth 3011 should be pressed and fit the surface of the crushing roller 201 at the interval of the crushing teeth 3011 when crushing in the normal use state. During the detection, the crushing roller 201 is driven to rotate at a low speed, and each row of crushing teeth 3011 rotates in turn. When the crushing teeth 3011 are in the crushing state, the crushing roller 201 is driven to rotate at a low speed, and each row of crushing teeth 3011 rotates in turn. When wear occurs to the crushing teeth 3011, when the crushing teeth 3011 rotate to the side of the crushing roller 201, the crushing sliding block 301 will be driven to move outward under the pressure of the limit spring 303, so as to keep the crushing teeth 3011 attached to the crushing roller 201. At this time, because the crushing teeth 3011 are worn as a whole, the micro switch 304 will no longer squeeze the crushing roller 201, and the corresponding alarm control light 106 can be controlled to turn off the internal lamp bead to prompt; the guide bottom plate 1011 can promote the accumulation of precipitated crushed particles at the bottom of the flotation conveyor 6, so as to facilitate the conveying of the flotation conveyor 6.

[0046] like Figure 4 , Fig. 9 and Fig.10As shown, the magnetic separation element 4 includes a magnetic separation roller 401 rotatably mounted on the pulverizing box 101, and a magnetic separation motor 402 is fixedly mounted on the pulverizing box 101 through a bracket; the output shaft of the magnetic separation motor 402 is fixedly mounted on the end of the magnetic separation roller 401; cams 403 are fixedly mounted on both ends of the magnetic separation roller 401; the two cams 403 are respectively located on both sides of the pulverizing box 101; a row of electromagnets 404 are fixedly mounted inside the magnetic separation roller 401; the row of electromagnets 404 is used to magnetically absorb iron metal impurities in the plastic raw material; the magnetic separation roller 401 is attached to the scraper The magnetic separation member 5 includes a separation push plate 501 slidably mounted on the crushing box 101, and the separation push plate 501 is aligned with the scraping plate 103; cam control plates 502 are fixedly mounted on both ends of the separation push plate 501; the two cam control plates 502 are respectively attached to the two sides of the crushing box 101; the two cam control plates 502 are respectively attached to the two cams 403; the magnetic separation member 5 also includes two tension springs 503 fixedly mounted on both sides of the crushing box 101; the tops of the two tension springs 503 are respectively fixedly connected to the sides of the cam control plates 502; the two A tension spring 503 is used to pull the two cam control plates 502 to stick to the cam 403; the separation push plate 501 is used to scrape off the iron metal impurities on the scraper plate 103. The magnetic separation separation element 5 can be used for magnetic separation, and can be used to separate the iron metal wire and other impurities in the plastic raw materials to ensure the crushing quality. The magnetic separation separation element 5 is used to realize the automatic impurity separation work to prevent the impurities from being magnetically attracted to the outside of the magnetic separation roller 401. The magnetic separation roller 401 used uses a row of electromagnets 404 to ensure the comprehensiveness of the magnetic separation. The separation push plate 5 is used 01 can automatically rise and fall, scrape off impurities such as ferrous metal wires, and ensure the sustainable use of the magnetic separation roller 401. A row of electromagnets 404 inside the magnetic separation roller 401 are used to magnetically absorb ferrous impurities. At this time, as the magnetic separation motor 402 drives the magnetic separation roller 401, the ferrous impurities are driven to rotate and can be scraped by the scraper plate 103. As the magnetic separation roller 401 rotates, the cam 403 is driven to squeeze the cam control plate 502. At this time, the cam control plate 502 can drive the separation push plate 501 to rise and fall, scrape and push the ferrous impurities on the scraper plate 103 for cleaning.

[0047] like Figure 4 , Fig.11 , Fig.12As shown, the flotation conveying member 6 includes two rows of feed pipes 601 fixedly mounted on the crushing box 101; the two rows of feed pipes 601 are respectively provided with discharge holes 602; the two rows of feed pipes 601 are at different heights; the lower row of feed pipes 601 is used to transport sediments; the upper row of feed pipes 601 is used to transport floating objects; the two rows of feed pipes 601 are obliquely installed on the crushing box 101; the flotation conveying member 6 also includes conveying motors 603 respectively fixedly mounted on the two rows of feed pipes 601; the output shafts of the two rows of feed motors 603 respectively pass through the ends of the two rows of feed pipes 601; and feed augers 604 are respectively fixedly mounted on the output shafts of the two rows of feed motors 603 ; The two rows of feed augers 604 are respectively provided with mesh holes; the mesh holes on the two rows of feed augers 604 are used to filter out moisture; the two rows of feed augers 604 are respectively located inside the two rows of feed pipes 601, and the flotation conveying element 6 is used to continuously convey and discharge the plastic crushed particles. At the same time, the flotation conveying element 6 can filter out moisture from the plastic particles, and independently convey the precipitated particles and floating particles in the plastic particles, which can be more suitable for actual plastic raw material crushing work and can classify and sort different raw materials; the raw material particles fall into the crushing box 101, and the moisture inside the crushing box 101 can float the plastic with low density to the water surface.

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

[0049] 1) The driving motor 202 drives the two driving crushing rollers 201 to rotate, and the crushing teeth 3011 crush the plastic raw materials. When the crushing teeth 3011 are detected to be worn, the two crushing rollers 201 are controlled to rotate at a low speed. When the crushing teeth 3011 are worn out after long-term use, the micro switch 304 will no longer squeeze the crushing rollers 201. At this time, the internal lamp beads of the corresponding alarm control lamp 106 can be controlled to go out for prompting;

[0050] 2) The crushed materials and the iron metal impurities contained in the crushing teeth 3011 fall together on the guide plate 104 and the magnetic separation guide plate 105, and 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 push plate 501 to rise and fall, scrape and push the iron impurities on the scraper plate 103 to clean;

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

[0052] The working principle provided by the present invention is that first, the crushing box 101 is placed on the ground, water is stored at the bottom of the crushing box 101, and the plastic raw material is placed between the two crushing rollers 201. Under the drive of the driving motor 202, the gear 203 is engaged and driven, and the crushing work can be carried out through the crushing teeth 3011. The crushed plastic particles fall to the bottom of the crushing box 101 for sorting. When the wear degree of the crushing teeth 3011 is detected, 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 tooth 3011 is worn, when the crushing tooth 3011 rotates to the side of the crushing roller 201, the crushing sliding block 301 will be driven to move outward under the pressure of the limit spring 303, keeping the crushing tooth 3011 attached to the crushing roller 201. At this time, because the crushing tooth 3011 is greatly worn as a whole, the micro switch 304 will no longer squeeze the crushing roller 201. At this time, the internal lamp bead of the corresponding alarm control light 106 can be controlled to go out to prompt, correspondingly, if the overall wear degree of the crushing tooth 3011 meets the standard.

[0053] When the crushing teeth 3011 rotate to the position attached to the crushing roller 201, the micro switch 304 will be squeezed, and the alarm control light 106 can remain on. Each lamp bead inside the alarm control light 106 is controlled by the micro switch 304. The guide bottom plate 1011 can promote the accumulation of precipitated crushed material particles at the bottom of the flotation conveyor 6; the crushed material and the iron metal impurities contained in the crushing teeth 3011 fall together on the guide plate 104 and the magnetic separation guide plate 105, and are guided to the side of the magnetic separation roller 401 by the guide plate 104 and the magnetic separation guide plate 105. The row of electromagnets 404 inside the magnetic separation roller 401 magnetically absorbs the iron impurities, and the plastic particles continue to fall to the bottom of the crushing box 101. At this time, as the magnetic The motor 402 drives the magnetic separation roller 401 to rotate, and the iron impurities can be scraped by the scraper plate 103. However, under the magnetic attraction of the electromagnet 404, the iron impurities will not fall immediately, but will gather on the top of the scraper plate 103. At this time, as the magnetic separation roller 401 rotates, the cam 403 is driven to squeeze the cam control plate 502. At this time, the cam control plate 502 can drive the separation push plate 501 to rise and fall. At this time, the separation push plate 501 can move downward to scrape and push the iron impurities on the scraper plate 103. At this time, the iron impurities are pushed downward. As the iron impurities are continuously pushed downward, they are no longer magnetically attracted by the electromagnet 404, and the cleaning work can be achieved, so that the scraper plate 103 can continue to clean the magnetic separation roller 401.

[0054] The conveying motor 603 drives the conveying auger 604 to rotate. At this time, the upper conveying auger 604 conveys floating particles and discharges them through the upper discharge hole 602, and the lower conveying auger 604 conveys precipitated plastic particles. The precipitated plastic can be independently conveyed and discharged through the discharge hole 602 on the lower conveying pipe 601. Conveyor belts can be set under the two layers of discharge holes 602 for transportation.

[0055] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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.

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 2, characterized in that: The magnetic separation component includes a magnetic separation roller rotatably mounted on a pulverizing box, on which a magnetic separation motor is fixedly mounted via 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; the 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 ferrous metal impurities in plastic raw materials; the magnetic separation roller is attached to a scraper plate.

6. The plastic raw material fine pulverizing device according to claim 5, characterized in that: The magnetic separation component includes a separation push plate slidably mounted on the crushing box, and the separation push plate is aligned with the scraping plate; cam control plates are fixedly mounted on both ends of the separation push plate; the two cam control plates are respectively attached to both sides of the crushing box; the two cam control plates are respectively attached to two cams.

7. The plastic raw material fine pulverizing device according to claim 6, characterized in that: 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.

8. The plastic raw material fine pulverizing 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.

9. The plastic raw material fine pulverizing device according to claim 8, 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.

10. 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 9, 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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