A dust separation crusher for plastic recycling

Abstract

The invention discloses a dust separation type crusher for plastic recycling, which relates to the field of dust separation type crushers for plastic recycling, and comprises a filter box, a cutting box and a dust separation mechanism. The filter box is installed just below an extrusion crushing box, a filter plate is installed in the filter box, the filter plate can screen and discharge small-volume plastics, and the filter plate can discharge large-volume plastics into a cutting box, and two transverse cutting rollers and two longitudinal cutting rollers are installed in the cutting box through bearings; the dust separation mechanism comprises a fan, a filter bag installation cylinder and a dust collecting hopper, a dust collecting inner hopper is fixedly installed in the dust collecting hopper, an air inlet end of the fan is connected with the inside of the filter box through a pipeline, and an air outlet end of the fan is connected with the inside of the dust collecting inner hopper through a pipeline, and through the arrangement of the above structure, flexible plastics can be cut longitudinally, which is convenient for subsequent processing of the plastics and avoids affecting the plastic recycling results.

Description

Technical Field

[0001] The invention relates to the field of plastic crushers, in particular to a floating dust separation type crusher for plastic recycling. Background Art

[0002] Plastics are difficult to degrade. In order to save costs and reduce environmental pollution, plastics generally need to be recycled and the waste plastics need to be crushed. The crushed plastics enter the barrel, and then enter the plastic extruder for melting and extrusion, and then enter the mold for molding. Plastic crushers are used to crush various plastics and rubbers, that is, to crush waste plastics and rubber products, and the crushed pellets are recycled and can be directly extruded or used as production raw materials.

[0003] The existing plastic crusher generally has a simple structure, including two rollers, and an extrusion block is arranged on the outside of the roller, which is used to squeeze and crush the plastic. However, this type of plastic crusher has the following problems: 1. This type of plastic crusher can only crush hard plastics, while flexible plastics cannot be completely crushed after passing through the extrusion roller due to their elasticity, and the expected crushing effect cannot be achieved, which affects the plastic recycling result; 2. A large amount of floating dust will be generated during the crushing process of waste plastics. The floating dust will float in the air when discharged in the production workshop, polluting the environment in the production workshop, and the production personnel will be inhaled. It causes great harm to the body. Some existing plastic crushers are equipped with a dust recovery structure, such as a drum-type plastic crusher disclosed in publication number CN110126137B, in which the dust removal structure is arranged to collect the floating dust by installing a filter bag on the air outlet end of the dust removal fan. This dust removal method still has problems. The single-layer filter bag cannot completely block the floating dust. After long-term use, a small amount of floating dust will pass through the filter bag, and there is still a hidden danger of polluting the production environment. Moreover, since the filter bag is made of flexible material, it is inconvenient when the dust collection reaches a certain level and needs to be cleaned. Summary of the invention

[0004] The object of the present application is to provide a dust separation crusher for plastic recycling. A dust separation mechanism is set, which comprises a fan, a filter bag mounting cylinder and a dust collecting hopper, wherein a dust collecting inner hopper is fixedly installed in the dust collecting hopper, an air inlet end of the fan is connected with the inside of the filter box through a pipeline, and an air outlet end of the fan is connected with the inside of the dust collecting inner hopper through a pipeline, a lifting plate is installed on the top of the filter bag mounting cylinder, and a plurality of filter bags are fixedly installed on the bottom end of the lifting plate, and the plurality of filter bags are arranged in layers, and the innermost filter bag is connected with the dust collecting inner hopper, and the fan is used to extract the floating dust generated by the plastic crushing into the dust collecting inner hopper, after the filter bags are filtered layer by layer, the air is discharged, and the plastic floating dust in the air is isolated in the filter bags, and finally falls into the dust collecting hopper and the dust collecting inner hopper and is collected, so as to avoid polluting the environment of the production workshop. In addition, compared with the existing floating dust collection structure, the dust collection effect of the present invention is better, and it is more convenient to collect and clean the floating dust.

[0005] To achieve the above purpose, the present application provides the following technical solution: a floating dust separation crusher for plastic recycling, comprising:

[0006] An extrusion crushing box, wherein two extrusion rollers are installed in the extrusion crushing box through bearings, and the two extrusion rollers can extrude and crush hard plastics;

[0007] A filter box is installed directly below the extrusion crushing box. A filter plate is installed in the filter box, and the filter plate can filter and discharge small-volume plastics;

[0008] A cutting box, wherein the filter plate can discharge large-volume plastics into the cutting box, wherein two transverse cutting rollers and two longitudinal cutting rollers are installed in the cutting box through bearings, wherein the outer walls of the two transverse cutting rollers are provided with a plurality of transverse cutting blades equidistantly installed in a circular array, and the transverse cutting blades on the two transverse cutting rollers are engaged with each other, wherein the two longitudinal cutting rollers are installed directly below the two transverse cutting rollers, wherein the outer walls of the two longitudinal cutting rollers are provided with a plurality of longitudinal cutting blades equidistantly installed in a linear array, and the longitudinal cutting blades on the two longitudinal cutting rollers are staggered, and the two transverse cutting rollers and the two longitudinal cutting rollers can rotate synchronously in opposite directions;

[0009] A floating dust separation mechanism, the floating dust separation mechanism comprises a fan, a filter bag installation cylinder and a dust collecting hopper, the dust collecting hopper is fixedly installed at the bottom of the filter bag installation cylinder, a dust collecting inner hopper is fixedly installed in the dust collecting hopper, the air inlet end of the fan is connected with the inside of the filter box through a pipeline, the air outlet end of the fan is connected with the inside of the dust collecting inner hopper through a pipeline, a lifting plate is installed at the top of the filter bag installation cylinder, the lifting plate can do up and down reciprocating motion, a plurality of filter bags are fixedly installed at the bottom end of the lifting plate, the plurality of filter bags are layered, and the innermost filter bag is connected with the dust collecting inner hopper;

[0010] A feed hopper is fixedly installed on the top of the extrusion and crushing box, a discharge hopper is fixedly installed on the bottom of the cutting box, and sealing doors are hingedly installed on the top of the feed hopper and the bottom of the discharge hopper.

[0011] Preferably, a filter plate is obliquely installed on the top of the filter box via an elastic connection structure, a vibrator is fixedly installed on the filter plate, a flexible plastic discharge outlet is opened on one side of the filter box, the lower end of the filter plate is inserted into the flexible plastic discharge outlet, a discharge plate is fixedly installed on the bottom of the filter box, the discharge plate is inclined, a hard plastic discharge outlet is opened on the other side of the filter box, and the lowered end of the discharge plate is set at the hard plastic discharge outlet.

[0012] Preferably, a bag mouth fixing frame is fixedly installed on the bottom end of the filter bag mounting cylinder, and a plurality of fixing rings are fixedly installed on the bag mouth fixing frame. The diameters of the plurality of fixing rings correspond to the bag mouth diameters of the plurality of filter bags, and the bag mouths of the respective filter bags are fixedly connected to the corresponding fixing rings, and the top end of the dust collecting inner bucket is arranged to fit the top end of the innermost fixing ring.

[0013] Preferably, the filter bag is columnar, and a filter cloth is fixedly installed inside the innermost filter bag, the filter cloth is columnar, and the cross section of the filter cloth is honeycomb-shaped.

[0014] Preferably, the lifting plate is connected to the inner wall of the filter bag mounting cylinder through an elastic connection structure, a rotating shaft is installed at the top of the filter bag mounting cylinder through a bearing, a motor is fixedly installed on the outer wall of the filter bag mounting cylinder, one end of the rotating shaft is connected to the output end of the motor, and a push block is fixedly installed in the middle of the rotating shaft.

[0015] Preferably, an exhaust port is provided at the top of the filter bag mounting cylinder, and a dust collecting box is sleeved at the bottom of the dust collecting hopper.

[0016] Preferably, one end of the two squeezing rollers, one end of the two transverse cutting rollers and one end of the two longitudinal cutting rollers are respectively fixedly mounted with mutually meshing gear sets, and one of the squeezing rollers, one of the transverse cutting rollers and the longitudinal cutting roller are respectively connected to the output end of the corresponding driving motor.

[0017] Preferably, the elastic connection structure includes a fixing block, a stud, a nut and a spring, one end of the stud is fixedly connected to the fixing block, the other end of the stud is threadedly connected to the nut, the spring is sleeved on the stud and one end of the spring is fixedly connected to the fixing block.

[0018] Preferably, the top of the filter bag mounting cylinder is hinged with an opening and closing door via a hinge, the bottom end of the filter bag mounting cylinder and the top end of the dust hopper are fixedly mounted with connecting flanges, and the filter bag mounting cylinder and the dust hopper are connected via connecting flanges and bolts.

[0019] In summary, the technical effects and advantages of the present invention are as follows:

[0020] 1. In the present invention, the plastic is squeezed and crushed by using the squeezing and crushing box, the hard plastic is crushed into blocks, and the flexible plastic is not crushed. A filter box is arranged directly below the squeezing and crushing box to separate the hard plastic fragments and the flexible plastic and discharge them separately. The top of the cutting box is connected with the flexible plastic discharge port of the filter box. Two transverse cutting rollers and two longitudinal cutting rollers are installed in the cutting box through bearings. A plurality of transverse cutting blades are equidistantly installed in a circular array on the outer walls of the two transverse cutting rollers to cut the flexible plastic transversely. A plurality of longitudinal cutting blades are equidistantly installed in a linear array on the outer walls of the two longitudinal cutting rollers to cut the flexible plastic longitudinally, so as to ensure that the flexible plastic can also be processed into fragments, facilitate the subsequent processing of the plastic, and avoid affecting the plastic recycling result.

[0021] 2. In the present invention, a floating dust separation mechanism is provided, which comprises a fan, a filter bag mounting cylinder and a dust hopper, wherein a dust collecting inner hopper is fixedly installed in the dust hopper, an air inlet end of the fan is connected with the inside of the filter box through a pipeline, and an air outlet end of the fan is connected with the inside of the dust collecting inner hopper through a pipeline. A lifting plate is installed on the top of the filter bag mounting cylinder, and a plurality of filter bags are fixedly installed on the bottom end of the lifting plate. The plurality of filter bags are arranged in layers, and the filter bag in the innermost layer is connected with the dust collecting inner hopper. The fan is used to extract the floating dust generated by the plastic crushing into the dust collecting inner hopper. After the filter bags are filtered layer by layer, the air is discharged, and the plastic floating dust in the air is isolated in the filter bags and finally falls into the dust collecting hopper and the dust collecting inner hopper to be collected, so as to avoid polluting the environment of the production workshop. In addition, compared with the existing floating dust collection structure, the dust collection effect of the present invention is better, and it is more convenient to collect and clean the floating dust.

[0022] 3. In the present invention, the lifting plate is connected to the inner wall of the filter bag installation cylinder through an elastic connection structure. A rotating shaft is installed on the top of the filter bag installation cylinder through a bearing. One end of the rotating shaft is connected to the output end of the motor. A push block is fixedly installed in the middle of the rotating shaft. The pushing block can be driven to rotate by driving the rotating shaft. The pushing block repeatedly pushes the lifting plate. The lifting plate performs reciprocating lifting and lowering motion under the action of the elastic connection structure, which can shake off the plastic floating dust attached to the filter bag, avoid a large amount of floating dust attached to the filter bag, and make the collection of plastic floating dust more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle;

[0026] Figure 3 It is a schematic diagram of the structure of the extrusion and crushing box, the filtering box and the cutting box from the first perspective of the present invention;

[0027] Figure 4 It is a second perspective structural schematic diagram of the extrusion and crushing box, the filtering box and the cutting box of the present invention;

[0028] Figure 5 It is a front cutaway schematic diagram of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the longitudinal cutting roller of the present invention;

[0030] Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0031] Figure 8 It is a cutaway schematic diagram of the dust collecting hopper of the present invention;

[0032] Fig. 9 This is a schematic cross-sectional view of the filter bag installation cylinder of the present invention;

[0033] Fig.10 This is a schematic diagram of the internal structure of the filter bag installation cylinder of the present invention;

[0034] Fig.11 For the present invention Fig. 9 Enlarged structural diagram at B in the middle.

[0035] In the figure: 1. extrusion crushing box; 101. extrusion roller; 2. filter box; 201. flexible plastic discharge port; 202. filter plate; 203. hard plastic discharge port; 204. discharge plate; 3. cutting box; 301. transverse cutting roller; 302. longitudinal cutting roller; 303. transverse cutting blade; 304. longitudinal cutting blade; 305. discharge hopper; 4. floating dust separation mechanism; 401. fan; 402. filter bag installation cylinder; 403. dust hopper; 404. dust collecting inner hopper; 405. lifting plate; 406. filter bag; 407. bag opening fixing frame; 408. fixing ring; 409. filter cloth; 410. rotating shaft; 411. push block; 412. exhaust port; 413. dust collecting box; 5. feed hopper; 6. fixing block; 7. stud; 8. nut; 9. spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example: Reference Figure 1-5 A dust separation crusher for plastic recycling shown in the figure comprises:

[0038] An extrusion crushing box 1, wherein two extrusion rollers 101 are installed in the extrusion crushing box 1 through bearings, and the two extrusion rollers 101 can extrude and crush hard plastics;

[0039] The filter box 2 is installed directly below the extrusion and crushing box 1. The plastic after extrusion and crushing directly falls into the filter box 2. The filter box 2 is installed with a filter plate 202. The filter plate 202 can filter and discharge small-volume plastics;

[0040] The cutting box 3, the filter plate 202 can discharge large-volume plastics into the cutting box 3. Since hard plastics can be squeezed and crushed into small-volume particles, and flexible plastics are not easily crushed into small-volume particles after squeezing due to their characteristics, the filter plate 202 can basically separate hard plastics from flexible plastics, and a small amount of mixing does not affect the crushing structure. Two transverse cutting rollers 301 and two longitudinal cutting rollers 302 are installed in the cutting box 3 through bearings. Multiple transverse cutting blades 303 are equidistantly installed on the outer walls of the two transverse cutting rollers 301 in a circular array, and the transverse cutting blades 303 on the two transverse cutting rollers 301 are engaged with each other to drive the transverse cutting rollers 301. The transverse cutting blades 303 can cut the flexible plastic transversely; the two longitudinal cutting rollers 302 are installed directly below the two transverse cutting rollers 301, such as Figure 6-7 As shown, a plurality of longitudinal cutting blades 304 are installed in a linear array and equidistantly on the outer walls of the two longitudinal cutting rollers 302, and the longitudinal cutting blades 304 on the two longitudinal cutting rollers 302 are arranged alternately, and the longitudinal cutting blades 304 can cut the flexible plastic longitudinally, and the two transverse cutting rollers 301 and the two longitudinal cutting rollers 302 can rotate synchronously in opposite directions, and the two can cooperate to cut the flexible plastic into small pieces, which is convenient for subsequent processing;

[0041] The floating dust separation mechanism 4 includes a fan 401, a filter bag installation cylinder 402 and a dust collecting hopper 403. The dust collecting hopper 403 is fixedly installed at the bottom of the filter bag installation cylinder 402. Figure 8-10 As shown, a dust collecting inner bucket 404 is fixedly installed in the dust collecting hopper 403, the air inlet end of the fan 401 is connected with the inside of the filter box 2 through a pipeline, and the air outlet end of the fan 401 is connected with the inside of the dust collecting inner bucket 404 through a pipeline, so that the plastic floating dust in the filter box 2 is directly discharged into the dust collecting inner bucket 404, and a lifting plate 405 is installed on the top of the filter bag installation cylinder 402, and the lifting plate 405 can do up and down reciprocating motion, and a plurality of filter bags 406 are fixedly installed on the bottom end of the lifting plate 405, and the plurality of filter bags 406 are arranged layer by layer, The innermost filter bag 406 is connected to the dust collecting hopper 404. After the plastic dust enters the dust collecting hopper 404, some of the heavier dust falls directly, and the rest of the dust floats upward with the air. The air containing the plastic dust diffuses outward from the innermost filter bag 406. Multiple filter bags 406 filter the air layer by layer, and finally the clean air is discharged outward. The dust adheres to the filter bag 406, and the lifting plate 405 reciprocates up and down. The dust is shaken off at the bottom of the dust collecting hopper 403 and the dust collecting hopper 404 for easy collection, so as to avoid polluting the environment of the production workshop.

[0042] A feed hopper 5 is fixedly installed on the top of the extrusion and crushing box 1 to facilitate feeding, and a discharge hopper 305 is fixedly installed on the bottom of the cutting box 3 to facilitate discharging of the crushed plastic. The top of the feed hopper 5 and the bottom of the discharge hopper 305 are both hingedly installed with sealing doors to ensure that when the present invention is working, the interior of the extrusion and crushing box 1, the filtering box 2 and the cutting box 3 are not connected to the outside to prevent the diffusion of floating dust.

[0043] Furthermore, a filter plate 202 is obliquely installed on the top of the filter box 2 via an elastic connection structure, and a vibrator is fixedly installed on the filter plate 202. The crushed plastic falls onto the filter plate 202 after being squeezed, and the vibrator drives the filter plate 202 to vibrate. Small-volume plastic particles fall through the sieve holes of the filter plate 202, and large-volume plastic moves along the oblique direction of the filter plate 202 to complete the screening process. A flexible plastic discharge port 201 is provided on one side of the filter box 2, and the lower end of the filter plate 202 is inserted into the flexible plastic discharge port 201 to discharge the screened plastic particles. The accumulated plastic is discharged from the flexible plastic discharge port 201 into the cutting box 3, a discharge plate 204 is fixedly installed at the bottom of the filter box 2, the discharge plate 204 is tilted, a hard plastic discharge port 203 is opened on the other side of the filter box 2, and the lower end of the discharge plate 204 is set at the hard plastic discharge port 203. After the small-volume plastic particles fall from the filter plate 202, they fall on the discharge plate 204 and fall in the tilted direction of the discharge plate 204, and are finally discharged from the hard plastic discharge port 203. After the above process, the basic separation of hard plastic and flexible plastic is completed.

[0044] Furthermore, a bag opening fixing frame 407 is fixedly installed at the bottom end of the filter bag mounting tube 402, and a plurality of fixing rings 408 are fixedly installed on the bag opening fixing frame 407. The diameters of the plurality of fixing rings 408 correspond to the bag opening diameters of the plurality of filter bags 406, and the bag openings of the filter bags 406 are fixedly connected to the corresponding fixing rings 408. The bag openings of the filter bags 406 are fixed by the fixing rings 408. The top of the dust collecting inner bucket 404 is fitted with the top of the innermost fixing ring 408, so that the air containing floating dust first enters the innermost filter bag 406, and then diffuses outward layer by layer until it is discharged, thereby ensuring that the floating dust is filtered layer by layer.

[0045] Furthermore, the filter bag 406 is columnar, and a filter cloth 409 is fixedly installed inside the innermost filter bag 406. The filter cloth 409 is columnar, and the cross-section of the filter cloth 409 is honeycomb-shaped. The innermost filter bag 406 is required to filter the largest amount of plastic floating dust, and the speed at which the floating dust adheres to the innermost filter bag 406 will be very fast. When the amount of floating dust attached to the filter bag 406 is too much, its air permeability will be affected, thereby affecting the floating dust filtering effect. The surface area of ​​the innermost filter bag 406 is increased by setting the filter cloth 409, so that the attachment area of ​​the floating dust is increased, and then the amount of floating dust attached per unit area is reduced in the same time, so as to prevent the floating dust from attaching too quickly and affecting the filtering effect of the innermost filter bag 406.

[0046] Furthermore, the lifting plate 405 is connected to the inner wall of the filter bag mounting cylinder 402 through an elastic connection structure, and a rotating shaft 410 is rotatably installed between the two side walls of the top of the filter bag mounting cylinder 402 through bearings. A motor is fixedly installed on the outer wall of the filter bag mounting cylinder 402, and one end of the rotating shaft 410 is connected to the output end of the motor. A pushing block 411 is fixedly installed in the middle of the rotating shaft 410. Driving the rotating shaft 410 to rotate can drive the pushing block 411 to rotate, and the pushing block 411 repeatedly pushes the lifting plate 405. The lifting plate 405 performs reciprocating lifting and lowering motion under the action of the elastic connection structure, which can shake off the plastic floating dust attached to the filter bag 406, avoid a large amount of floating dust attached to the filter bag, and make the collection of plastic floating dust more thorough.

[0047] Furthermore, an exhaust port 412 is provided at the top of the filter bag mounting cylinder 402. After the air containing plastic dust is filtered by multiple filter bags 406, the clean air is discharged from the exhaust port 412. A dust box 413 is provided at the bottom of the dust hopper 403. During the air filtering process, the dust box 413 is installed at the bottom of the dust hopper 403 to prevent plastic dust from being discharged from the dust hopper 403 and the dust collecting inner hopper 404, and to collect the plastic dust that falls into the dust hopper 403 and the dust collecting inner hopper 404. After the dust collection is completed, the dust box 413 is removed to facilitate the subsequent treatment of the plastic dust and cleaning of the device.

[0048] Furthermore, one end of the two squeezing rollers 101, one end of the two transverse cutting rollers 301 and one end of the two longitudinal cutting rollers 302 are respectively fixedly installed with mutually meshing gear sets, and one of the squeezing rollers 101, one of the transverse cutting rollers 301 and one of the longitudinal cutting rollers 302 are respectively connected to the output ends of the corresponding driving motors, so that the movements between the two squeezing rollers 101, the two transverse cutting rollers 301 and the two longitudinal cutting rollers 302 can be kept consistent, thereby ensuring the effects of hard plastic extrusion and flexible plastic cutting.

[0049] Furthermore, if Fig.11As shown, the elastic connection structure includes a fixing block 6, a stud 7, a nut 8 and a spring 9, one end of the stud 7 is fixedly connected to the fixing block 6, the other end of the stud 7 is threadedly connected to the nut 8, the spring 9 is sleeved on the stud 7 and one end of the spring 9 is fixedly connected to the fixing block 6;

[0050] Specifically, a filter plate 202 is obliquely installed on the top of the filter box 2 via an elastic connection structure. When the elastic connection structure is installed between the inner wall of the filter box 2 and the filter plate 202, the fixing block 6 is fixedly installed on one side of the inner wall of the filter box 2, and the bottom end of the stud 7 is fixedly connected to the fixing block 6. The top end of the stud 7 slides through the surface of the filter plate 202 and is threadedly connected to the nut 8. The spring 9 is sleeved on the stud 7 and the bottom end of the spring 9 is fixedly connected to the fixing block 6. The top end of the spring 9 abuts against the lower surface of the filter plate 202. Then, the filter plate 202 is elastically connected to the inside of the filter box 2. The filter plate 202 can perform reciprocating motion to screen the crushed plastic. When the elastic connection is performed, the nut 8 is used to prevent the filter plate 202 from detaching from the stud 7. After the nut 8 is rotated and removed, the filter plate 202 can be removed from the stud 7 to complete the disassembly.

[0051] The lifting plate 405 is connected to the inner wall of the filter bag mounting cylinder 402 through an elastic connection structure. When the elastic connection structure is installed between the lifting plate 405 and the inner wall of the filter bag mounting cylinder 402, the fixing block 6 is fixedly installed on one side of the inner wall of the filter bag mounting cylinder 402, the bottom end of the stud 7 is fixedly connected to the fixing block 6, the top end of the stud 7 slides through the surface of the lifting plate 405 and is threadedly connected to the nut 8, the spring 9 is sleeved on the stud 7 and the bottom end of the spring 9 is fixedly connected to the fixing block 6, the top end of the spring 9 abuts against the lower surface of the lifting plate 405; then the lifting plate 405 is elastically connected to the inside of the filter bag mounting cylinder 402, the lifting plate 405 performs reciprocating motion to shake off the plastic dust attached to the filter bag 406, and the nut 8 is used to prevent the lifting plate 405 from detaching from the stud 7 during the elastic connection, and the lifting plate 405 can be removed from the stud 7 after the nut 8 is rotated and removed, completing the disassembly.

[0052] Furthermore, an opening and closing door is hinged on the top of the filter bag mounting cylinder 402 by a hinge, and a connecting flange is fixedly installed on the bottom end of the filter bag mounting cylinder 402 and the top end of the dust collecting hopper 403. The filter bag mounting cylinder 402 and the dust collecting hopper 403 are connected by connecting flanges and bolts, so that the filter bag mounting cylinder 402 and the dust collecting hopper 403 can be separated, which is convenient for cleaning the inside of the filter bag mounting cylinder 402 and the dust collecting hopper 403 after long-term use, as well as replacement of the filter bag 406.

[0053] Working principle: When the present invention is used, the extrusion roller 101, the transverse cutting roller 301 and the longitudinal cutting roller 302 are all connected to the driving motor, and the driving motor is used to drive the extrusion roller 101, the transverse cutting roller 301 and the longitudinal cutting roller 302, and the vibration motor and the fan 401 are started at the same time. The plastic is added into the feed hopper 5, and the plastic falls into the extrusion crushing box 1. The two extrusion rollers 101 squeeze the plastic, and the hard plastic is crushed into pieces after being squeezed, while the flexible plastic cannot be completely crushed. The extruded plastic falls on the filter plate 202, and the vibration motor drives the filter plate 202 to vibrate. The hard plastic pieces pass through the filter plate 202 and are discharged from the hard plastic discharge port 203 through the discharge plate 204. The flexible plastic, because it is not completely crushed and has a large volume, enters the cutting box 3 from the filter plate 202 through the flexible plastic discharge port 201. After the flexible plastic enters the cutting box 3, it falls between two transverse cutting rollers 301, and the transverse cutting knife 303 cuts the flexible plastic transversely. After that, the flexible plastic falls between two longitudinal cutting rollers 302, and the longitudinal cutting knife 304 cuts the flexible plastic longitudinally. The flexible plastic is cut into pieces and finally discharged from the discharge hopper 305. During the plastic crushing process, the fan 401 discharges the generated floating dust into the dust collecting hopper 404 through the pipe. Part of the floating dust falls directly into the dust collecting box 413, and more floating dust floats upward, is blocked by the filter bag 406, and then sinks or adheres to the filter bag 406, while the clean air is discharged from the exhaust port 412. The motor connected to the rotating shaft 410 is started, and the motor drives the rotating shaft 410 to rotate. The push block 411 repeatedly pushes the lifting plate 405, and the lifting plate 405 performs reciprocating lifting and lowering motion under the action of the elastic connection structure, which can shake off the plastic floating dust attached to the filter bag 406 and fall into the dust collecting box 413. After the plastic crushing work is completed, the dust collecting box can be removed to dispose of the floating dust.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust separation crusher for plastic recycling, characterized in that: include: An extrusion crushing box (1), wherein two extrusion rollers (101) are mounted in the extrusion crushing box (1) via bearings, and the two extrusion rollers (101) are capable of extruding and crushing hard plastics; A filter box (2), the filter box (2) being installed directly below the extrusion crushing box (1), the filter box (2) being provided with a filter plate (202), the filter plate (202) being capable of filtering out small-volume plastics and discharging them; A cutting box (3), wherein the filter plate (202) is capable of discharging a large volume of plastic into the cutting box (3), wherein two transverse cutting rollers (301) and two longitudinal cutting rollers (302) are installed in the cutting box (3) via bearings, wherein the outer walls of the two transverse cutting rollers (301) are provided with a plurality of transverse cutting blades (303) equidistantly installed in a circular array, and the transverse cutting blades (303) on the two transverse cutting rollers (301) are engaged with each other, wherein the two longitudinal cutting rollers (302) are installed directly below the two transverse cutting rollers (301), wherein the outer walls of the two longitudinal cutting rollers (302) are provided with a plurality of longitudinal cutting blades (304) equidistantly installed in a linear array, and the longitudinal cutting blades (304) on the two longitudinal cutting rollers (302) are arranged in an alternating manner, and wherein the two transverse cutting rollers (301) and the two longitudinal cutting rollers (302) are capable of synchronously rotating in opposite directions; A floating dust separation mechanism (4), the floating dust separation mechanism (4) comprising a fan (401), a filter bag mounting cylinder (402) and a dust collecting hopper (403), the dust collecting hopper (403) being fixedly mounted on the bottom of the filter bag mounting cylinder (402), a dust collecting inner hopper (404) being fixedly mounted inside the dust collecting hopper (403), an air inlet end of the fan (401) being connected to the inside of the filter box (2) via a pipeline, an air outlet end of the fan (401) being connected to the inside of the dust collecting inner hopper (404) via a pipeline, a lifting plate (405) being mounted on the top of the filter bag mounting cylinder (402), the lifting plate (405) being capable of reciprocating up and down, a plurality of filter bags (406) being fixedly mounted on the bottom end of the lifting plate (405), the plurality of filter bags (406) being arranged in layers, and the innermost filter bag (406) being connected to the dust collecting inner hopper (404); A feed hopper (5) is fixedly mounted on the top of the extrusion and crushing box (1), a discharge hopper (305) is fixedly mounted on the bottom of the cutting box (3), and sealing doors are hingedly mounted on the top of the feed hopper (5) and the bottom of the discharge hopper (305); A filter plate (202) is obliquely mounted on the top of the filter box (2) via an elastic connection structure, a vibrator is fixedly mounted on the filter plate (202), a flexible plastic discharge outlet (201) is provided on one side of the filter box (2), a lower end of the filter plate (202) is inserted into the flexible plastic discharge outlet (201), a discharge plate (204) is fixedly mounted on the bottom of the filter box (2), the discharge plate (204) is obliquely mounted, a hard plastic discharge outlet (203) is provided on the other side of the filter box (2), and a lowered end of the discharge plate (204) is arranged at the hard plastic discharge outlet (203); A bag opening fixing frame (407) is fixedly installed at the bottom end of the filter bag installation cylinder (402), and a plurality of fixing rings (408) are fixedly installed on the bag opening fixing frame (407), the diameters of the plurality of fixing rings (408) correspond to the bag opening diameters of the plurality of filter bags (406), and the bag openings of the respective filter bags (406) are fixedly connected to the corresponding fixing rings (408), and the top end of the dust collecting inner bucket (404) is arranged to fit the top end of the innermost fixing ring (408); The filter bag (406) is columnar, and a filter cloth (409) is fixedly installed inside the innermost filter bag (406), the filter cloth (409) is columnar, and the cross section of the filter cloth (409) is honeycomb-shaped; The lifting plate (405) is connected to the inner wall of the filter bag installation cylinder (402) via an elastic connection structure; a rotating shaft (410) is installed at the top of the filter bag installation cylinder (402) via a bearing; a motor is fixedly installed on the outer wall of the filter bag installation cylinder (402); one end of the rotating shaft (410) is connected to the output end of the motor; and a push block (411) is fixedly installed in the middle of the rotating shaft (410); An exhaust port (412) is provided at the top of the filter bag installation cylinder (402), and a dust collection box (413) is sleeved at the bottom of the dust collection hopper (403); The elastic connection structure comprises a fixing block (6), a stud (7), a nut (8) and a spring (9); one end of the stud (7) is fixedly connected to the fixing block (6); the other end of the stud (7) is threadedly connected to the nut (8); the spring (9) is sleeved on the stud (7) and one end of the spring (9) is fixedly connected to the fixing block (6).

2. A dust separation crusher for plastic recycling according to claim 1, characterized in that: One end of the two squeezing rollers (101), one end of the two transverse cutting rollers (301), and one end of the two longitudinal cutting rollers (302) are respectively fixedly mounted with mutually meshing gear sets, and one of the squeezing rollers (101), one of the transverse cutting rollers (301), and one of the longitudinal cutting rollers (302) are respectively connected to the output end of the corresponding drive motor.

3. The dust separation crusher for plastic recycling according to claim 1, characterized in that: The top of the filter bag installation cylinder (402) is hinged with an opening and closing door via a hinge, the bottom end of the filter bag installation cylinder (402) and the top end of the dust collecting hopper (403) are both fixedly mounted with connecting flanges, and the filter bag installation cylinder (402) and the dust collecting hopper (403) are connected via the connecting flanges and bolts.

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