Background
At present, with the development of society, people rely on plastics more and more, plastic products are ubiquitous, and after the service life or the use purpose of the products are achieved, the products can be discarded to become waste plastics, most of the plastic products, especially a large number of disposable plastic products, the performance of the plastic materials is not changed greatly after the products are used, so that the plastic products can be recycled and then reprocessed into the plastic products by using a proper method for reuse.
The prior art publication No. CN111070466A discloses a waste plastic granulating reprocessing machine, which comprises a machine body, wherein a heating cavity is arranged on the upper side of the machine body, a communicated crushing cavity is arranged on the lower side of the heating cavity, a feeding cavity is arranged on the lower side of the crushing cavity, a discharging cavity is arranged on the right side of the feeding cavity, a crushing device for crushing plastic is arranged in the crushing cavity, an extruding device can melt crushed plastic blocks to soften the plastic blocks, the plastic blocks are extruded by a screw rod to be in a strip shape and then are cut into plastic particles by a cutting knife, the size of the plastic particles can be controlled by adjusting to adapt to different purposes, the machine is convenient for recycling the plastic, the processes are combined, and the processing efficiency can be improved;
however, common plastic products are mainly divided into thermoplastic plastics and thermosetting plastics, and because the appearance of the two plastics is not greatly different under the influence of the coating in plastic processing, but the melting point of the thermoplastic plastics is between 100 ℃ and 200 ℃, the thermoplastic plastics can be melted and granulated after being heated for continuous recycling, and the recycling property is strong; however, after the thermosetting plastic is processed and molded, the thermosetting plastic is difficult to melt even under high-temperature heating due to irreversibility, so that the thermosetting plastic is difficult to recycle, and the thermoplastic plastic can be efficiently processed in the prior art, but the thermoplastic plastic and the thermosetting plastic in the crushed plastic particles cannot be distinguished, so that the thermosetting plastic particles exist in the plastic after being recovered, heated and melted, the purity of the plastic after being recovered and processed can be influenced, and the overall economic benefit of plastic recovery and processing can be further influenced.
How to invent a waste plastic granulation treatment device with a screening function to improve the problems becomes a problem to be urgently solved by the technical personnel in the field.
Disclosure of Invention
In order to make up for the defects, the invention provides a waste plastic granulating treatment device with a screening function, and aims to solve the problem that in the prior art, the thermosetting plastic which cannot be recycled and processed is difficult to separate in the plastic recycling and processing process.
The invention is realized by the following steps:
the invention provides a waste plastic granulation treatment device with a screening function, which comprises a treatment device, a hot gas pipeline and a particle collecting box, wherein a feed inlet is formed in the top of the treatment device, a fixed frame is fixedly installed in the treatment device, a screening frame is fixedly installed in the treatment device, a melting cavity is further formed in the treatment device and is positioned below the screening frame, a movable screening plate is arranged in the fixed frame, a plurality of groups of screening rollers which are uniformly distributed are rotatably connected to the inner side of the screening frame through bearings and rotating shafts, a driving motor is further fixedly installed in the treatment device, an output shaft of the driving motor is connected with the rotating shafts of the screening rollers, a first transmission shaft is rotatably connected to the interior of the treatment device through bearings, a transmission cam is fixedly installed on the outer side wall of the first transmission shaft, a transmission belt is arranged between the first transmission shaft and the output shaft of the driving motor, and the outer side wall of the transmission cam is contacted with the bottom of the movable screening plate;
the tail end of the hot gas pipeline extends to the inside of the treatment device and is positioned above the screening frame, a plurality of groups of heating pipelines are arranged on the outer side wall of the hot gas pipeline, and the heating pipelines are distributed in an increasing state along the distribution direction of the screening rollers from high to low;
through the scheme, the device is whole different through the melting point of recoverable plastics, at first sieves the size of plastic granules through movable sieve plate, then heats the screening through screening roller and heating pipeline to the recoverability of screening back plastic granules, can realize sieving and collecting the size and the performance of plastic granules, has reduced the impurity in the thermoplastic granules after retrieving, has improved the purity of retrieving plastic granules, has ensured the economic nature of retrieving processing.
Preferably, the fixed frame is internally provided with a limiting chute, and the side wall of the movable sieve plate is provided with a fixed slide block movably clamped with the limiting chute;
the top of the movable sieve plate is designed to be inclined, the inside of the movable sieve plate is designed to be hollow, and the top of the movable sieve plate is provided with a wave-shaped filter screen.
Preferably, the arrangement direction of the screening rollers is designed to be inclined, a conveying inclined plate with the same slope as the screening rollers is arranged at the lower part of the inner side wall of the screening frame, and a collecting tank is arranged in the treatment device and is positioned below the tail end of the conveying inclined plate.
Preferably, the screen hole diameter of the screen on the top of the movable screen deck is slightly larger than the gap between adjacent screening rollers.
Preferably, the inside of the treatment device is rotatably connected with a second transmission shaft through a group of fixed blocks and bearings, the inside of the treatment device is also rotatably connected with a third transmission shaft through a group of fixed blocks and bearings, the bottom of the melting cavity is rotatably connected with a fourth transmission shaft through a group of bearings, and the inside of the treatment device is also rotatably connected with a fifth transmission shaft through bearings;
a set of transmission belt is arranged between the second transmission shaft and an output shaft of the driving motor, one end, close to the fifth transmission shaft, of the second transmission shaft is in meshed transmission through two sets of bevel gears, one end, close to the third transmission shaft, of the second transmission shaft is in meshed transmission through two sets of bevel gears, and one end, close to the fourth transmission shaft, of the third transmission shaft is also in meshed transmission through two sets of bevel gears.
Preferably, the end that third transmission shaft and fourth transmission shaft are close is provided with a set of spherical safety cover, and spherical safety cover is circular cavity design, and spherical safety cover is connected with third transmission shaft and fourth transmission shaft rotation respectively through two sets of sealed bearing.
Preferably, the outer side wall of the fourth transmission shaft is fixedly provided with an annular frame and a helical blade, the helical blade is in a helical design, and the edge and the bottom of the annular frame are respectively attached to the inner side wall and the bottom of the melting cavity.
Preferably, the bottom of the treatment device is provided with a discharge port, the discharge port is communicated with the bottom of the melting cavity through a group of pipelines, one end of the fifth transmission shaft, which extends to the outer side of the bottom of the treatment device, is fixedly provided with a cutting knife, and the top of the cutting knife is attached to the bottom of the treatment device.
Preferably, the hot gas pipeline extends to the inside of the processing device and is distributed on the side wall of the melting cavity, the outer side of a communication pipeline between the melting cavity and the discharge port and the outer side of the fifth transmission shaft in a winding-accompanying manner;
through the scheme, the hot air pipeline can heat, melt and granulate the screened plastic particles while heating and screening the broken plastic particles, so that the multi-stage utilization of energy is realized, and the energy consumption is effectively reduced.
The beneficial effects of the invention are:
the size of plastic particles is firstly screened through different melting points of the recyclable plastic, and then the recyclable plastic particles are subjected to heating screening, so that the size and the performance of the plastic particles can be screened and collected, impurities in the recycled thermoplastic particles are reduced, the purity of the recycled plastic particles is improved, and the economical efficiency of recycling and processing is guaranteed; and can melt and cut the granulation to plastics through the associated heating of hot gas pipeline simultaneously screening, go on deep processing to plastic granules when screening, improve machining efficiency, realize the multistage utilization of energy, effectively practiced thrift the energy.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example 1
Referring to fig. 1-3, a waste plastic granulation treatment device with a screening function comprises a treatment device 1, a hot gas pipeline 2 and a particle collection box 3, wherein a feed inlet 11 is formed in the top of the treatment device 1, a fixed frame 12 is fixedly installed inside the treatment device 1, a screening frame 5 is fixedly installed inside the treatment device 1, a melting chamber 4 is further formed in the treatment device 1 below the screening frame 5, a movable screening plate 122 is arranged inside the fixed frame 12, a plurality of groups of screening rollers 51 which are uniformly distributed are rotatably connected to the inner side of the screening frame 5 through bearings and rotating shafts, a driving motor 14 is further fixedly installed inside the treatment device 1, an output shaft of the driving motor 14 is connected with the rotating shaft of the screening rollers 51, a first transmission shaft 141 is rotatably connected inside the treatment device 1 through bearings, a transmission cam 142 is fixedly installed on the outer side wall of the first transmission shaft 141, a transmission belt is arranged between the first transmission shaft 141 and the output shaft of the driving motor 14, and the outer side wall of the transmission cam 142 is in contact with the bottom of the movable screening plate 122;
the tail end of the hot gas pipeline 2 extends to the inside of the processing device 1 and is located above the screening frame 5, a plurality of groups of heating pipelines 21 are arranged on the outer side wall of the hot gas pipeline 2, and the lengths of the heating pipelines 21 are distributed in an increasing state along the distribution direction of the screening rollers 51 from high to low.
As shown in fig. 2-3, a limiting chute 121 is formed inside the fixed frame 12, and a fixed slider 123 movably clamped with the limiting chute 121 is formed on the side wall of the movable sieve plate 122;
the top of the movable sieve plate 122 is designed to be inclined, the inside of the movable sieve plate 122 is designed to be hollow, and a waved filter screen is arranged at the top of the movable sieve plate 122.
As shown in fig. 2, the arrangement direction of the screening rollers 51 is designed to be inclined, a conveying inclined plate 52 having the same slope as that of the screening rollers 51 is arranged at a lower portion of the inner side wall of the screening frame 5, and the collecting tank 13 is provided inside the treatment apparatus 1 below the end of the conveying inclined plate 52.
As shown in fig. 2, the top screen of the moving screen deck 122 has a screen hole diameter slightly larger than the gap between adjacent screening rollers 51.
The working principle of the waste plastic granulation treatment device with the screening function is as follows:
firstly, conveying broken plastic particles towards the interior of a treatment device 1 through a feeding hole 11, controlling a driving motor 14 to be electrified and started, and simultaneously introducing hot air into a hot air pipeline 2;
an output shaft of the driving motor 14 can drive the sieving roller 51 to rotate, so that the sieving roller 51 rotates towards the direction of the conveying inclined plate 52 for conveying, meanwhile, the first transmission shaft 141 is driven to rotate through a belt, and further the transmission cam 142 rotates, through the convex design of the transmission cam 142, the movable sieve plate 122 can be circularly pushed while the transmission cam 142 rotates, the fixed sliding block 123 is driven to slide along the limiting sliding chute 121 in the vertical direction, and further the movable sieve plate 122 is driven to sieve, because the filtering hole of the movable sieve plate 122 is slightly larger than the gap of the sieving roller 51, small particles which cannot be sieved by the sieving roller 51 can be filtered and collected through the filtering of the movable sieve plate 122, so that the sieving quality and effect are ensured, meanwhile, due to the design of the inclined wavy filter screen of the movable sieve plate 122, the stay time of the plastic particles on the movable sieve plate 122 can be prolonged, and the small plastic particles which cannot be sieved can be efficiently removed through the shaking and sieving of the movable sieve plate 122;
after entering the surface of the screening roller 51, the screened plastic particles are conveyed towards the direction of the collecting tank 13 by the rotation of the screening roller 51, meanwhile, hot gas inside the hot gas pipeline 2 is blown out through the heating pipeline 21, the hot gas at about 200 ℃ blown out by the heating pipeline 21 can quickly soften and deform thermoplastic plastic particles in the plastic particles, and then the thermoplastic plastic particles fall into the melting chamber 4 through the gaps of the screening roller 51 by the rotation of the screening roller 51, while the thermosetting plastic particles are difficult to change in state due to heating, and finally fall into the inside of the collecting tank 13 through the conveying inclined plate 52 along with the rolling transmission of the screening roller 51, and the distances from the tail end of the heating pipeline 21 to the screening roller 51 are approximately equal due to the increasing distribution of the length of the heating pipeline 21, so that the hot gas blown out by the heating pipeline 21 can be prevented from being lost, and the heating and softening effects on the plastic particles can be ensured;
the device is whole different through recoverable plastics's melting point, at first sieve the size of plastic granules, then but the recoverability to screening back plastic granules heats the screening, not only can realize the high-efficient screening to the plastic granules after the breakage, effectively sieve and collect thermoplastic, but also can drive movable sieve plate 122 sieve in the screening to thermoplastic and move, show the filter effect who promotes movable sieve plate 122, the impurity in the recovery back thermoplastic granules that has significantly reduced, the purity of retrieving plastic granules has been improved, the economic nature of retrieving processing has been ensured.
Example 2
Referring to fig. 3 to 7, the apparatus for granulating waste plastic with a sieving function according to claim 1, wherein the inside of the apparatus 1 is rotatably connected to a second transmission shaft 143 through a set of fixing blocks and bearings, the inside of the apparatus 1 is further rotatably connected to a third transmission shaft 144 through a set of fixing blocks and bearings, the bottom of the melting chamber 4 is rotatably connected to a fourth transmission shaft 145 through a set of bearings, and the inside of the apparatus 1 is further rotatably connected to a fifth transmission shaft 148 through bearings;
a group of transmission belts are arranged between the second transmission shaft 143 and the output shaft of the driving motor 14, one end of the second transmission shaft 143, which is close to the fifth transmission shaft 148, is in meshing transmission through two groups of bevel gears, one end of the second transmission shaft 143, which is close to the third transmission shaft 144, is in meshing transmission through two groups of bevel gears, and one end of the third transmission shaft 144, which is close to the fourth transmission shaft 145, is also in meshing transmission through two groups of bevel gears;
the bottom of the melting chamber 4 is provided with a pipe that flows toward the discharge port 16, and the bottom of the melting chamber 4 is also provided with an electromagnetic valve.
Referring to fig. 4, a group of spherical protection covers 15 is disposed at the end of the third transmission shaft 144 close to the end of the fourth transmission shaft 145, the spherical protection covers 15 are circular and hollow, and the spherical protection covers 15 are respectively rotatably connected to the third transmission shaft 144 and the fourth transmission shaft 145 through two groups of sealed bearings;
it should be noted that, the bevel gear at the connection of the third transmission shaft 144 and the fourth transmission shaft 145 can be protected by the spherical protection cover 15, so as to prevent the screened plastic particles from entering and affecting the transmission effect.
As shown in fig. 4, the outer side wall of the fourth transmission shaft 145 is fixedly provided with a ring frame 146 and a helical blade 147, the helical blade 147 is of a helical design, and the edge and the bottom of the ring frame 146 are respectively attached to the inner side wall and the bottom of the melting chamber 4.
As shown in fig. 7, a discharge port 16 is opened at the bottom of the processing apparatus 1, the discharge port 16 is communicated with the bottom of the melting chamber 4 through a set of pipes, a cutting knife 17 is fixedly mounted at one end of the fifth transmission shaft 148 extending to the outer side of the bottom of the processing apparatus 1, and the top of the cutting knife 17 is attached to the bottom of the processing apparatus 1.
As shown in fig. 5, the hot gas duct 2 extends into the interior of the processing apparatus 1, and is distributed in a concomitant winding manner outside the side wall of the melting chamber 4, the communicating duct of the melting chamber 4 with the discharge port 16, and outside the fifth drive shaft 148.
The working principle is as follows:
after the hot gas pipeline 2 extends to the inside of the processing device 1 and is wound, thermoplastic plastic particles collected inside the melting chamber 4 can be heated, meanwhile, an output shaft of the driving motor 14 drives the second transmission shaft 143 to rotate through a belt, the second transmission shaft 143 drives the third transmission shaft 144 and the fifth transmission shaft 148 to rotate through meshing of bevel gears, the third transmission shaft 144 drives the fourth transmission shaft 145 to rotate through meshing of bevel gears, the annular frame 146 and the spiral blades 147 are driven to rotate through rotation of the fourth transmission shaft 145, the molten plastic particles inside the melting chamber 4 can be stirred through rotation of the annular frame 146 and the spiral blades 147, the melting effect of the plastic particles is improved, the inner side wall of the melting chamber 4 can be scraped through the annular frame 146, the molten plastic is prevented from attaching to the inner side wall of the melting chamber 4, the heating uniformity can be effectively ensured, the spiral blades 147 can drive the molten plastic particles at the bottom and below the melting chamber 4 to the top through spiral design, so that the molten plastic particle liquid inside the melting chamber 4 circularly flows under stirring, and the heating uniformity is ensured;
when the heated and melted liquid needs to be discharged, the electromagnetic valve at the bottom of the melting cavity 4 can be opened, the heated plastic liquid is discharged, the melted liquid flows towards the direction of the discharge port 16 through the pipeline in the processing device 1, heat can be absorbed by the processing device 1 when the plastic solution passes through the pipeline, so that the temperature becomes low and begins to solidify, meanwhile, under the condition of associated winding heat supply of the hot gas pipeline 2, the plastic solution in the pipeline keeps flowing and avoids solidification, when the plastic solution flows to the discharge port 16, the external temperature is low, the melted plastic solution can begin to soften and solidify, the fifth transmission shaft 148 drives the cutting knife 17 to rotate, the cutting knife 17 can cut the plastic solution which extends to the outside of the discharge port 16 and begins to solidify, the plastic particles are cut, the cut particles fall into the particle collecting box 3 for collection and cooling, the later-stage processing is convenient, meanwhile, the fifth transmission shaft 148 is also associated and wound due to the hot gas pipeline 2, the fifth transmission shaft 148 is heated, the cutting knife 17 is driven to be heated, the cutting knife 17 can not only improve the cutting effect on the plastic particles, but also can make the particles contacted with the cutting knife 17, and the water flow of the cooled plastic particles adhere to the plastic particles;
above-mentioned scheme also can melt and cut grain processing to the plastics after the screening when hot gas pipeline 2 sieves broken plastics, drive through driving motor 14 can drive the inside ring frame 146 of melting chamber 4 and helical blade 147 and rotate, can improve the homogeneity of heating, and then improve the effect of melting of plastic granules, can conveniently soften and cut the plastic solution after the heating through the associated heating of hot gas pipeline 2 simultaneously, go deep into processing to plastic granules in the screening, the machining efficiency is improved, the cyclic utilization of energy is improved, the energy has effectively been practiced thrift.
It should be noted that the specific model specification of the motor needs to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.