Winnowing separation equipment and separation method for removing labels from fragments of plastic bottles

Abstract

The invention relates to the technical field of plastic recycling, and discloses winnowing separation equipment and a separation method for removing labels from fragments of plastic bottles, the winnowing separation equipment comprises a device body, a screening and crushing mechanism, a driving mechanism and a label outlet, the screening and crushing mechanism is mounted in the device body, the driving mechanism is mounted in the device body, and the label outlet is connected with the driving mechanism. The label outlet is formed in the bottom of the device body. Before plastic bottle fragments enter the separation sleeve, the screening and crushing mechanism screens incompletely crushed plastic bottle fragments in advance, and in the working process, the driving motor can drive the screening and crushing mechanism to secondarily crush the incompletely crushed plastic bottle fragments; and the plastic bottle fragments enter the separation sleeve after being subjected to secondary crushing, so that the problem of incomplete separation caused by the fact that labels are wound on the incompletely crushed plastic bottle fragments in the subsequent winnowing separation process can be effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling, and specifically to an air separation device and a separation method for removing labels from plastic bottle fragments. Background Art

[0002] Plastic waste is not only difficult to degrade in the natural environment but also pollutes the environment. Recycling plastic waste can not only reduce environmental pollution but also prevent waste of resources.

[0003] Chinese Patent CN112077114B discloses an aluminum-plastic separation and recycling device, including a heating barrel. A paper base removal structure is arranged inside the heating barrel. The paper base removal structure includes a speed reducer arranged on the outer wall of the upper end of the heating barrel, a temperature sensor arranged inside the heating barrel, and a plurality of electric heating rods arranged on the inner wall of the bottom of the heating barrel. A plurality of stirring rods are arranged on the positioning plate; the heating barrel is connected to the upper end of the side wall of an air separation barrel through a discharging structure. A plurality of air outlet covers are also arranged on the side wall of the air separation barrel. The air outlet covers are connected to a second blower through a second air pipe. A discharging port is arranged on the side wall of the air separation barrel opposite to the air outlet covers. The air separation barrel is connected to a reflux tank through a second discharging pipe. A reflux cover is arranged inside the reflux tank. The reflux cover is connected to the heating barrel through a reflux pipe. An air suction fan is arranged on the reflux pipe.

[0004] In the above patent and the prior art, when plastic bottle fragments are separated by air separation, the plastic bottles may not be crushed thoroughly, resulting in adhesion between the plastic bottle fragments. And during the subsequent air separation, the labels in the plastic bottle fragments will be wound around the plastic bottle fragments, making it difficult to separate the labels from the plastic bottle fragments. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an air separation device and a separation method for removing labels from plastic bottle fragments.

[0006] An air separation device and a separation method for removing labels from plastic bottle fragments, including a device main body, a screening and crushing mechanism, a driving mechanism, and a label outlet. The screening and crushing mechanism is installed inside the device main body. The driving mechanism is installed inside the device main body. The label outlet is opened at the bottom of the device main body. A separation sleeve is installed on the driving mechanism. A plastic bottle fragment outlet is fixedly installed outside the device main body. A suction fan is fixedly installed at the bottom of the label outlet. A label discharge port is fixedly installed outside the suction fan. A device support frame is installed at the bottom of the device main body. A feeding trough opening is installed at the top of the device main body. A shunt fan is installed at the top of the device main body;

[0007] The main body of the device is inclined and installed on the top of the device support frame. The exhaust fan is communicated with the inside of the main body of the device through the label outlet. A plastic bottle fragment outlet is installed on the lower side of the main body of the device.

[0008] The separation sleeve is rotationally installed inside the main body of the device through a driving mechanism. The separation sleeve is of an inclined structure. The higher side of the separation sleeve faces the screening and crushing mechanism, and the lower side of the separation sleeve faces the plastic bottle fragment outlet.

[0009] The screening and crushing mechanism can perform secondary damage to the plastic bottle fragments entering the inside of the separation sleeve. The driving mechanism can drive the separation sleeve to rotate inside the main body of the device. When the separation sleeve rotates, it can drive the plastic bottle fragments to roll and make the labels fall from the inside of the separation sleeve to the inside of the main body of the device. The exhaust fan can suck out the labels inside the main body of the device through the label outlet and assist in separating the plastic bottle fragments from the labels.

[0010] Preferably, a vibration motor is installed at the bottom of the main body of the device.

[0011] Preferably, the screening and crushing mechanism includes a screening main body. The screening main body is fixedly installed inside the main body of the device. Fragment gathering blocks are arranged inside the screening main body. A fragment diversion plate is fixedly installed inside the screening main body. Fragment screening columns are fixedly installed at the top of the fragment diversion plate. A horizontal connecting plate is slidably installed inside the screening main body. Auxiliary separation columns are installed at the top of the horizontal connecting plate. A transmission rack is installed at the bottom of the horizontal connecting plate. A screening and separation spring is installed at the bottom of the horizontal connecting plate. A fragment outlet is provided on the outside of the screening main body.

[0012] Preferably, the inner side of the fragment gathering block is a concave inclined structure. The top of the fragment diversion plate is a convex structure inclined to both sides. The top of the fragment diversion plate is connected to the fragment gathering block through the fragment screening columns.

[0013] The inclined structure on the fragment gathering block can make the plastic bottle fragments fall towards the middle of the fragment diversion plate. The inclined structure on the fragment diversion plate can make the plastic bottle fragments fall towards both sides of the screening main body. The fragment screening columns between the fragment diversion plate and the fragment gathering block can limit the plastic bottle fragments that are not completely cut.

[0014] Preferably, the auxiliary separation columns at the top of the horizontal connecting plate extend from the bottom of the fragment diversion plate to above the fragment diversion plate. The positions of the auxiliary separation columns and the fragment screening columns are staggered from each other.

[0015] When the horizontal connecting plate slides left and right inside the screening body, it can drive the auxiliary separation column to move synchronously. When the auxiliary separation column moves, it can push and separate the plastic bottle fragments stuck on the fragment screening column, so that the incompletely broken plastic bottle fragments can be broken again.

[0016] Preferably, the bottom of the horizontal connecting plate is connected to the bottom of the debris diverter plate via a screening separation spring, and the bottom of the horizontal connecting plate is connected to the external transmission of the driving mechanism via a transmission rack.

[0017] Preferably, the driving mechanism includes a motor mounting seat and a transmission central shaft, the motor mounting seat is installed on the outside of the device body, the transmission central shaft is rotatably installed inside the device body, a driving motor is installed on the top of the motor mounting seat, a motor wheel is installed on the driving end of the driving motor, a transmission belt is installed on the outside of the motor wheel, a central shaft wheel is installed on one end of the transmission central shaft, a central shaft mounting plate is installed on the other end of the transmission central shaft, the central shaft mounting plate is installed inside the device body, a sleeve connecting frame is installed on the outside of the transmission central shaft, and a transmission gear is installed on the outside of the transmission central shaft.

[0018] Preferably, one end of the transmission central shaft is connected to the motor wheel outside the driving motor through the central shaft wheel and the transmission belt, and the outside of the transmission central shaft is fixedly connected to the separation sleeve through the sleeve connecting frame;

[0019] The driving motor can drive the motor wheel at the end to rotate. When the motor wheel rotates, it can drive the transmission central shaft to rotate through the transmission belt and the central shaft wheel. When the transmission central shaft rotates, it can drive the separation sleeve to rotate through the sleeve connecting frame.

[0020] Preferably, the outside of the transmission middle shaft is connected to the transmission rack at the bottom of the horizontal connecting plate through a transmission gear, and the outside of the transmission gear is only provided with a half circle of latch teeth;

[0021] When the transmission center shaft rotates, the horizontal connecting plate can be driven to move by the engagement of the transmission gear and the transmission rack. When the transmission gear is not engaged with the transmission rack, the transmission center shaft and the horizontal connecting plate are released from the transmission connection.

[0022] Preferably, one end of the transmission center shaft is rotatably mounted inside the device body through a center shaft mounting plate, and the other end of the transmission center shaft passes through the screening body and the device body and is mounted with a center shaft rotating wheel;

[0023] When the transmission center shaft rotates, it can not only drive the separation sleeve to rotate to separate the plastic bottle fragments and labels, but also simultaneously drive the horizontal connecting plate to move to assist in the feeding and secondary crushing of the plastic bottle fragments.

[0024] A separation method for removing labels from plastic bottle fragments uses the above-mentioned air separation equipment.

[0025] Compared with the prior art, the present invention provides an air separation equipment and a separation method for removing labels from plastic bottle fragments, having the following beneficial effects:

[0026] 1. For this air separation equipment, before the plastic bottle fragments enter the inside of the separation sleeve, the screening and crushing mechanism pre-screens the incompletely crushed plastic bottle fragments in the plastic bottle fragments, and during the working process, the driving motor can also drive the screening and crushing mechanism to perform secondary crushing on the incompletely crushed plastic bottle fragments. After the plastic bottle fragments are subjected to secondary crushing, they enter the inside of the separation sleeve, thereby effectively preventing the problem that the label is wound around the incompletely broken plastic bottle fragments during the subsequent air separation process, resulting in incomplete separation.

[0027] 2. For this air separation equipment, during the separation process, the driving mechanism drives the separation sleeve to rotate. When the separation sleeve rotates, it can drive the plastic bottle fragments inside to flip repeatedly and also enable the plastic bottle fragments to continuously move downward along the separation sleeve. The repeated flipping of the plastic bottle fragments can not only improve the separation effect of the labels in the plastic bottle fragments but also prevent the plastic bottle fragments from getting stuck in the holes on the separation sleeve, thereby enabling continuous air separation work of the plastic bottle fragments.

[0028] 3. For this air separation equipment, during the separation process, the exhaust fan sucks and separates the labels of the plastic product fragments in the separation sleeve from bottom to top, and after collection, they are uniformly discharged through the label discharge port. During the separation process, the labels can also be collected, thereby preventing the labels from flying and causing secondary rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural schematic diagram of an air separation equipment of the present invention Figure 1 ;

[0030] Figure 2 is a three-dimensional structural schematic diagram of an air separation equipment of the present invention Figure 2 ;

[0031] Figure 3 is a three-dimensional structural schematic diagram of an air separation equipment of the present invention Figure 3 ;

[0032] Figure 4 is a three-dimensional structural schematic diagram of an air separation equipment of the present invention Figure 4 ;

[0033] Figure 5 is a three-dimensional structural schematic diagram of the separation sleeve of an air separation equipment of the present invention;

[0034] Figure 6 Schematic three-dimensional structure diagram of the screening and separation mechanism of a pneumatic separation device according to the present invention;

[0035] Figure 7 Schematic internal structure diagram of the screening and separation mechanism of a pneumatic separation device according to the present invention Figure 1 ;

[0036] Figure 8 Schematic internal structure diagram of the screening and separation mechanism of a pneumatic separation device according to the present invention Figure 2 ;

[0037] Figure 9 Schematic three-dimensional structure diagram of the transmission mechanism of a pneumatic separation device according to the present invention Figure 1 ;

[0038] Figure 10 Schematic three-dimensional structure diagram of the transmission mechanism of a pneumatic separation device according to the present invention Figure 2 ;

[0039] Figure 11 Schematic three-dimensional structure diagram of a pneumatic separation device according to the present invention Figure 5 。

[0040] In the figure: 1, device main body; 2, screening and crushing mechanism; 21, screening main body; 22, debris gathering and clamping block; 23, debris diversion plate; 24, debris screening clamping column; 25, horizontal connecting plate; 26, auxiliary separation clamping column; 27, transmission rack; 28, screening and separation spring; 29, debris outlet; 3, separation sleeve; 4, drive mechanism; 41, motor mounting seat; 42, drive motor; 43, motor runner; 44, transmission belt; 45, middle shaft runner; 46, transmission middle shaft; 47, middle shaft mounting plate; 48, sleeve connecting frame; 49, transmission gear; 5, plastic bottle debris outlet; 6, label outlet; 7, exhaust fan; 8, label discharge port; 9, device support frame; 10, feed chute opening; 11, diversion fan; 12, vibration motor. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a pneumatic separation device and a separation method for removing labels from plastic bottle debris.

[0043] Embodiment 1:

[0044] Please refer to Figure 1 - Figure 11 , an air separation device, comprising a device main body 1, a screening and crushing mechanism 2, a driving mechanism 4 and a label outlet 6. The screening and crushing mechanism 2 is installed inside the device main body 1, the driving mechanism 4 is installed inside the device main body 1, a label outlet 6 is opened at the bottom of the device main body 1, a separation sleeve 3 is installed on the driving mechanism 4, a plastic bottle fragment outlet 5 is fixedly installed outside the device main body 1, a suction fan 7 is fixedly installed at the bottom of the label outlet 6, a label discharge port 8 is fixedly installed outside the suction fan 7, a device support frame 9 is installed at the bottom of the device main body 1, a feed trough opening 10 is installed at the top of the device main body 1, and a shunt fan 11 is installed at the top of the device main body 1;

[0045] The device main body 1 is inclined and installed on the top of the device support frame 9. The suction fan 7 is communicated with the inside of the device main body 1 through the label outlet 6. A plastic bottle fragment outlet 5 is installed on the lower side of the device main body 1;

[0046] The separation sleeve 3 is rotationally installed inside the device main body 1 through the driving mechanism 4. The separation sleeve 3 is of an inclined structure. The higher side of the separation sleeve 3 faces the screening and crushing mechanism 2, and the lower side of the separation sleeve 3 faces the plastic bottle fragment outlet 5;

[0047] The screening and crushing mechanism 2 can perform secondary destruction on the plastic bottle fragments entering the inside of the separation sleeve 3. The driving mechanism 4 can drive the separation sleeve 3 to rotate inside the device main body 1. When the separation sleeve 3 rotates, it can drive the plastic bottle fragments to roll and make the labels fall from the inside of the separation sleeve 3 into the inside of the device main body 1. The suction fan 7 can suck out the labels inside the device main body 1 through the label outlet 6 and assist in separating the plastic bottle fragments from the labels.

[0048] During operation, first pour plastic bottle fragments into the interior of the device through the feed chute opening 10. There are two channels inside the feed chute opening 10. The channel below the feed chute opening 10 enables the plastic bottle fragments to enter the screening and crushing mechanism 2, and the channel above the feed chute opening 10 enables the plastic bottle fragments to directly enter the separation sleeve 3. When the plastic bottle fragments move along the feed chute opening 10, the shunt fan 11 can generate an upward oblique suction force on the plastic bottle fragments. The suction force of the shunt fan 11 can directly draw the completely crushed fragments into the interior of the separation sleeve 3 through the channel above the feed chute opening 10, and the incompletely crushed fragments enter the screening and crushing mechanism 2 through the channel below the feed chute opening 10. The incompletely crushed plastic bottle fragments will get stuck inside the screening and crushing mechanism 2, and during the operation process, the driving mechanism 4 can drive the screening and crushing mechanism 2 to perform secondary crushing on the incompletely crushed plastic bottle fragments. After the plastic bottle fragments enter the interior of the separation sleeve 3, the driving mechanism 4 can drive the separation sleeve 3 to rotate. When the separation sleeve 3 rotates, it can drive the plastic bottle fragments inside to flip. During the flipping process, the labels in some of the plastic bottle fragments fall from the holes on the separation sleeve 3 into the interior of the device main body 1. And when the plastic bottle fragments move downward along the interior of the separation sleeve 3, the exhaust fan 7 can generate a suction force from the label outlet 6 towards the bottom of the separation sleeve 3. The suction force generated by the exhaust fan 7 can not only discharge the labels that have fallen into the interior of the device main body 1 from the label outlet 6 but also perform air separation on the labels in the plastic bottle fragments. The labels sucked out by the exhaust fan 7 are discharged from the label discharge port 8. The remaining plastic bottle fragments in the separation sleeve 3 continue to move along the separation sleeve 3 to the plastic bottle fragment outlet 5 and then are discharged along the plastic bottle fragment outlet 5. Before the plastic bottle fragments enter the separation sleeve 3, the screening and crushing mechanism 2 screens and secondarily crushes the incompletely broken plastic bottle fragments, thereby preventing the problem that the labels are wound around the incompletely broken plastic bottle fragments during the subsequent air separation process, resulting in incomplete separation.

[0049] In some embodiments, a vibration motor 12 is installed at the bottom of the device main body;

[0050] During the screening process, the vibration motor 12 drives the device main body 1 and the internal separation sleeve 3 to vibrate while screening the plastic bottle fragments, which can effectively prevent the plastic bottle fragments from getting stuck during the screening process and improve the screening efficiency.

[0051] Embodiment 2:

[0052] Please refer to Figure 1 - Figure 11, an air separation device, comprising a device main body 1, a screening and crushing mechanism 2, a driving mechanism 4 and a label outlet 6. The screening and crushing mechanism 2 is installed inside the device main body 1, the driving mechanism 4 is installed inside the device main body 1, a label outlet 6 is opened at the bottom of the device main body 1, a separation sleeve 3 is installed on the driving mechanism 4, a plastic bottle fragment outlet 5 is fixedly installed outside the device main body 1, an exhaust fan 7 is fixedly installed at the bottom of the label outlet 6, a label discharge port 8 is fixedly installed outside the exhaust fan 7, a device support frame 9 is installed at the bottom of the device main body 1, a feed trough opening 10 is installed at the top of the device main body 1, and a shunt fan 11 is installed at the top of the device main body 1;

[0053] The device main body 1 is inclined and installed on the top of the device support frame 9. The exhaust fan 7 is communicated with the inside of the device main body 1 through the label outlet 6. A plastic bottle fragment outlet 5 is installed on the lower side of the device main body 1;

[0054] The separation sleeve 3 is rotatably installed inside the device main body 1 through the driving mechanism 4. The separation sleeve 3 is of an inclined structure. The higher side of the separation sleeve 3 faces the screening and crushing mechanism 2, and the lower side of the separation sleeve 3 faces the plastic bottle fragment outlet 5;

[0055] The screening and crushing mechanism 2 can perform secondary destruction on the plastic bottle fragments entering the inside of the separation sleeve 3. The driving mechanism 4 can drive the separation sleeve 3 to rotate inside the device main body 1. When the separation sleeve 3 rotates, it can drive the plastic bottle fragments to roll and make the labels fall from the inside of the separation sleeve 3 into the inside of the device main body 1. The exhaust fan 7 can suck out the labels inside the device main body 1 through the label outlet 6 and assist in separating the plastic bottle fragments from the labels.

[0056] During operation, plastic bottle fragments are continuously poured into the screening and crushing mechanism 2. The completely crushed plastic bottle fragments enter the separation sleeve 3 after passing through the screening and crushing mechanism 2, while the incompletely crushed plastic bottle fragments get stuck inside the screening and crushing mechanism 2. During the operation, the driving mechanism 4 can drive the screening and crushing mechanism 2 to perform secondary crushing on the incompletely crushed plastic bottle fragments. After the plastic bottle fragments enter the separation sleeve 3, the driving mechanism 4 can drive the separation sleeve 3 to rotate. When the separation sleeve 3 rotates, it can drive the plastic bottle fragments inside to flip. During the flipping process, the labels in some of the plastic bottle fragments fall through the holes on the separation sleeve 3 into the device main body 1. And when the plastic bottle fragments move downward along the inside of the separation sleeve 3, the suction fan 7 can generate suction towards the bottom of the separation sleeve 3 through the label outlet 6. The suction generated by the suction fan 7 can not only discharge the labels that have fallen into the device main body 1 from the label outlet 6 but also perform air separation on the labels in the plastic bottle fragments. The labels sucked out by the suction fan 7 are discharged from the label discharge port 8. The remaining plastic bottle fragments in the separation sleeve 3 continue to move along the separation sleeve 3 to the plastic bottle fragment outlet 5 and then are discharged along the plastic bottle fragment outlet 5. Before the plastic bottle fragments enter the separation sleeve 3, the screening and crushing mechanism 2 screens and performs secondary crushing on the incompletely crushed plastic bottle fragments, thus preventing the problem that the labels are wound around the incompletely crushed plastic bottle fragments during the subsequent air separation process, resulting in incomplete separation.

[0057] Embodiment Three:

[0058] The difference from the above embodiment is as follows. Please refer to Figure 3 - Figure 7 , the screening and crushing mechanism 2 includes a screening main body 21, the screening main body 21 is fixedly installed inside the device main body 1. Inside the screening main body 21, there is a fragment gathering and clamping block 22. Inside the screening main body 21, a fragment diversion plate 23 is fixedly installed. At the top of the fragment diversion plate 23, a fragment screening and clamping column 24 is fixedly installed. Inside the screening main body 21, a horizontal connecting plate 25 is slidably installed. At the top of the horizontal connecting plate 25, an auxiliary separation clamping column 26 is installed. At the bottom of the horizontal connecting plate 25, a transmission rack 27 is installed. At the bottom of the horizontal connecting plate 25, a screening and separation spring 28 is installed. Outside the screening main body 21, there is a fragment outlet 29.

[0059] The inner side of the fragment gathering and clamping block 22 is a concave and inclined structure, and the top of the fragment diversion plate 23 is a convex structure inclined towards both sides. The top of the fragment diversion plate 23 is connected to the fragment gathering and clamping block 22 through the fragment screening and clamping column 24;

[0060] The inclined structure on the debris gathering block 22 can make the plastic bottle fragments fall to the middle of the debris diverter plate 23, and the inclined structure on the debris diverter plate 23 can make the plastic bottle fragments fall to both sides of the screening body 21, and the debris screening column 24 between the debris diverter plate 23 and the debris gathering block 22 can limit the incompletely cut plastic bottle fragments.

[0061] The auxiliary separation column 26 on the top of the horizontal connecting plate 25 extends from the bottom of the debris diverter plate 23 to the top of the debris diverter plate 23, and the positions of the auxiliary separation column 26 and the debris screening column 24 are staggered.

[0062] When the horizontal connecting plate 25 slides left and right inside the screening body 21, it can drive the auxiliary separation column 26 to move synchronously. When the auxiliary separation column 26 moves, it can push and separate the plastic bottle fragments stuck on the fragment screening column 24, so that the incompletely broken plastic bottle fragments can be broken again.

[0063] The bottom of the horizontal connecting plate 25 is connected to the bottom of the debris diverter plate 23 via a screening separation spring 28 , and the bottom of the horizontal connecting plate 25 is connected to the external transmission of the driving mechanism 4 via a transmission rack 27 .

[0064] During operation, plastic bottle fragments enter the interior of the screening main body 21 through the opening above the screening main body 21. After being gathered by the fragment gathering block 22, the plastic bottle fragments first fall onto the fragment diversion plate 23, and then the plastic bottle fragments fall to both sides along the fragment diversion plate 23. During the falling process of the plastic bottle fragments, the fragment screening column 24 between the fragment diversion plate 23 and the fragment gathering block 22 can intercept the incompletely broken plastic bottle fragments. When the driving central shaft 46 rotates, it can also drive the horizontal connecting plate 25 to move horizontally to the left through the meshing connection between the driving gear 49 and the driving rack 27. When the horizontal connecting plate 25 moves to the left, the auxiliary separation column 26 on the left side of the top of the horizontal connecting plate 25 can pass through the gap between the fragment screening columns 24 on the left side of the top of the fragment diversion plate 23. When the auxiliary separation column 26 passes through the gap between the fragment screening columns 24, it can perform secondary crushing on the incompletely broken plastic bottle fragments by extrusion and pulling. And when the horizontal connecting plate 25 moves to the left, it can also compress the screening separation spring 28. When the driving rack 27 is no longer meshed with the driving gear 49, the screening separation spring 28 rebounds. When the screening separation spring 28 rebounds, it can drive the horizontal connecting plate 25 to move to the right. When the horizontal connecting plate 25 moves to the right, the auxiliary separation column 26 on the right side of the top of the horizontal connecting plate 25 can pass through the gap between the fragment screening columns 24 on the right side of the top of the fragment diversion plate 23. Then the plastic bottle fragments continue to descend and enter the separation sleeve 3 through the fragment outlet 29. During the rotation of the driving central shaft 46, it repeatedly drives the horizontal connecting plate 25 to move left and right to perform secondary cleaning and crushing on the incompletely broken plastic bottle fragments stuck on the fragment screening column 24, thus effectively preventing the incompletely broken plastic bottle fragments from entering the separation sleeve 3 and causing the labels to be wound around the incompletely broken plastic bottle fragments, which affects the quality of air separation.

[0065] Embodiment 4:

[0066] The difference from the above embodiment is as follows. Please refer to Figure 2 - Figure 9 , the driving mechanism 4 includes a motor mounting base 41 and a driving central shaft 46. The motor mounting base 41 is installed outside the device main body 1, the driving central shaft 46 is rotatably installed inside the device main body 1. A driving motor 42 is installed on the top of the motor mounting base 41. A motor runner 43 is installed at the driving end of the driving motor 42. A transmission belt 44 is installed outside the motor runner 43. One end of the driving central shaft 46 is installed with a central shaft runner 45, the other end of the driving central shaft 46 is installed with a central shaft mounting plate 47, the central shaft mounting plate 47 is installed inside the device main body 1. A sleeve connecting frame 48 is installed outside the driving central shaft 46, and a driving gear 49 is installed outside the driving central shaft 46.

[0067] One end of the transmission central shaft 46 is drivingly connected to the motor runner 43 outside the driving motor 42 through the central shaft runner 45 and the transmission belt 44. The outside of the transmission central shaft 46 is fixedly connected to the separation sleeve 3 through the sleeve connection frame 48;

[0068] The motor runner 43 at the driving end of the driving motor 42 can rotate. When the motor runner 43 rotates, it can drive the transmission central shaft 46 to rotate through the transmission belt 44 and the central shaft runner 45. When the transmission central shaft 46 rotates, it can drive the separation sleeve 3 to rotate through the sleeve connection frame 48.

[0069] The outside of the transmission central shaft 46 is drivingly connected to the transmission rack 27 at the bottom of the horizontal connecting plate 25 through the transmission gear 49. Only half a circle of engaging teeth is provided on the outside of the transmission gear 49;

[0070] When the transmission central shaft 46 rotates, it can drive the horizontal connecting plate 25 to move by engaging with the transmission rack 27 through the transmission gear 49. When the transmission gear 49 is not engaged with the transmission rack 27, the transmission connection between the transmission central shaft 46 and the horizontal connecting plate 25 is released.

[0071] One end of the transmission central shaft 46 is rotatably installed inside the device main body 1 through the central shaft mounting plate 47. The other end of the transmission central shaft 46 passes through the screening main body 21 and the device main body 1 and is equipped with the central shaft runner 45;

[0072] When the transmission central shaft 46 rotates, it can not only drive the separation sleeve 3 to rotate to separate the plastic bottle fragments and labels, but also drive the horizontal connecting plate 25 to move at the same time to assist in the feeding and secondary crushing of the plastic bottle fragments.

[0073] When working, when the driving motor 42 drives the motor runner 43 to rotate, it can drive the transmission central shaft 46 to rotate through the transmission belt 44 and the central shaft runner 45. When the transmission central shaft 46 rotates, it can drive the separation sleeve 3 to rotate through the sleeve connection frame 48. When the separation sleeve 3 rotates, it can turn and mix the plastic bottle fragments, and the inclined structure of the separation sleeve 3 can make the plastic bottle fragments inside the separation sleeve 3 move downward along the separation sleeve 3 better when the separation sleeve 3 rotates. When the transmission central shaft 46 rotates, it can also drive the horizontal connecting plate 25 to move to one side by meshing the transmission gear 49 with the transmission rack 27. And the transmission gear 49 is only provided with half a week of engaging teeth, which can leave a space for the horizontal connecting plate 25 to rebound after driving the horizontal connecting plate 25 to move. During the air separation process, when the transmission central shaft 46 rotates to drive the screening and crushing mechanism 2 to continuously feed materials, it can also drive the separation sleeve 3 to rotate to turn the plastic bottle fragments and move them downward along the separation sleeve 3, so as to continuously carry out the air separation work of the plastic bottle fragments.

[0074] Example:

[0075] A separation method for removing labels from plastic bottle fragments, using a pneumatic separation device as described in Examples 1 to 3, includes the following steps:

[0076] During operation, first, the plastic bottle fragments are fed into the screening and crushing mechanism 2, and the screening and crushing mechanism 2 screens the incompletely crushed plastic bottle fragments;

[0077] Then, the driving mechanism 4 drives the screening and crushing mechanism 2 to perform secondary crushing on the incompletely crushed plastic bottles horizontally, and the driving mechanism 4 can also drive the separation sleeve 3 to rotate;

[0078] Then, when the separation sleeve 3 rotates to flip the plastic bottle fragments, the suction fan 7 sucks out the labels mixed in the plastic bottle fragments from the inside of the separation sleeve 3;

[0079] The remaining plastic bottle fragments continue to move along the separation sleeve 3 and finally are discharged from the plastic bottle fragment outlet 5.

[0080] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic separation device, comprising a device main body, a screening and crushing mechanism, a driving mechanism and a label outlet. The screening and crushing mechanism is installed inside the device main body, the driving mechanism is installed inside the device main body, and the label outlet is opened at the bottom of the device main body, characterized in that: The driving mechanism is provided with a separation sleeve, the outside of the device body is fixedly provided with a plastic bottle fragment outlet, the bottom of the label outlet is fixedly provided with an exhaust fan, the outside of the exhaust fan is fixedly provided with a label discharge port, the bottom of the device body is provided with a device support frame, the top of the device body is provided with a feed slot, and the top of the device body is provided with a split flow fan; The device body is installed obliquely at the top of the device support frame, the exhaust fan is connected to the inside of the device body through the label outlet, and a plastic bottle fragment outlet is installed on the lower side of the device body; The separation sleeve is rotatably installed inside the device body through a driving mechanism, and the separation sleeve is an inclined structure, with the higher side of the separation sleeve facing the screening and crushing mechanism, and the lower side of the separation sleeve facing the plastic bottle fragment outlet; The screening and crushing mechanism can perform secondary destruction on the plastic bottle fragments that enter the separation sleeve, the driving mechanism can drive the separation sleeve to rotate inside the device body, and when the separation sleeve rotates, it can drive the plastic bottle fragments to roll and make the label fall from the separation sleeve to the inside of the device body, and the exhaust fan can suck out the label inside the device body through the label outlet and assist in separating the plastic bottle fragments from the label.

2. The air separation device according to claim 1, characterized in that: The screening and crushing mechanism includes a screening body, which is fixedly installed inside the device body, a debris gathering block is arranged inside the screening body, a debris diverter plate is fixedly installed inside the screening body, a debris screening column is fixedly installed on the top of the debris diverter plate, a horizontal connecting plate is slidably installed inside the screening body, an auxiliary separation column is installed on the top of the horizontal connecting plate, a transmission rack is installed at the bottom of the horizontal connecting plate, a screening separation spring is installed at the bottom of the horizontal connecting plate, and a debris outlet is opened on the outside of the screening body.

3. The air separation device according to claim 2, characterized in that: The inner side of the debris gathering block is a concave inclined structure, the top of the debris diverter plate is a convex structure inclined toward both sides, and the top of the debris diverter plate is connected to the debris gathering block through a debris screening column; The inclined structure on the debris gathering block can make the plastic bottle fragments fall to the middle of the debris diversion plate, and the inclined structure on the debris diversion plate can make the plastic bottle fragments fall to both sides of the screening body. The debris screening column between the debris diversion plate and the debris gathering block can limit the incompletely cut plastic bottle fragments.

4. The air separation device according to claim 2, characterized in that: The auxiliary separation card column on the top of the horizontal connecting plate extends from the bottom of the debris diversion plate to the top of the debris diversion plate, and the positions of the auxiliary separation card column and the debris screening card column are staggered; When the horizontal connecting plate slides left and right inside the screening body, it can drive the auxiliary separation column to move synchronously. When the auxiliary separation column moves, it can push and separate the plastic bottle fragments stuck on the fragment screening column, so that the incompletely broken plastic bottle fragments can be broken again.

5. The air separation device according to claim 4, characterized in that: The bottom of the horizontal connecting plate is connected to the bottom of the debris diverter plate through a screening separation spring, and the bottom of the horizontal connecting plate is connected to the external transmission of the driving mechanism through a transmission rack.

6. The air separation device according to claim 5, wherein: The driving mechanism includes a motor mounting seat and a transmission central shaft. The motor mounting seat is installed outside the device main body, and the transmission central shaft is rotatably installed inside the device main body. A driving motor is installed on the top of the motor mounting seat, a motor runner is installed at the driving end of the driving motor, a transmission belt is installed outside the motor runner, a central shaft runner is installed at one end of the transmission central shaft, a central shaft mounting plate is installed at the other end of the transmission central shaft, the central shaft mounting plate is installed inside the device main body, a sleeve connecting frame is installed outside the transmission central shaft, and a transmission gear is installed outside the transmission central shaft.

7. The air separation device according to claim 6, characterized in that: One end of the transmission central shaft is in transmission connection with the motor runner outside the driving motor through the central shaft runner and the transmission belt, and the outside of the transmission central shaft is fixedly connected with the separation sleeve through the sleeve connecting frame; The driving motor can drive the motor runner at the driving end to rotate. When the motor runner rotates, it can drive the transmission central shaft to rotate through the transmission belt and the central shaft runner. When the transmission central shaft rotates, it can drive the separation sleeve to rotate through the sleeve connecting frame.

8. A pneumatic separation device according to claim 7, characterized in that: The outside of the transmission central shaft is in transmission connection with the transmission rack at the bottom of the horizontal connecting plate through the transmission gear, and only half a circle of engaging teeth is provided outside the transmission gear; When the transmission central shaft rotates, it can drive the horizontal connecting plate to move through the engagement of the transmission gear and the transmission rack. When the transmission gear is not engaged with the transmission rack, the transmission connection between the transmission central shaft and the horizontal connecting plate is released.

9. The air separation device according to claim 8, characterized in that: One end of the transmission central shaft is rotatably installed inside the device main body through the central shaft mounting plate, and the other end of the transmission central shaft passes through the screening main body and the device main body and is installed with a central shaft runner; When the transmission central shaft rotates, it can drive the separation sleeve to rotate to separate the plastic bottle fragments and labels, and can also drive the horizontal connecting plate to move at the same time to assist in the feeding and secondary crushing of the plastic bottle fragments.

10. A separation method for removing labels from plastic bottle fragments, using an air separation device according to any one of claims 1-9.

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