Multi-stage sorting device for plastic bottle pieces

Abstract

The invention relates to the technical field of sorting devices, and discloses a multi-stage sorting device for plastic bottle flakes, which comprises a rack, a vibration generating part is mounted on the rack, the vibration generating part is in transmission connection with a vibration sorting frame and an inner sorting shaft, a second-stage rotating cylinder is rotatably sleeved on the inner sorting shaft, a third-stage rotating cylinder is rotatably sleeved on the second-stage rotating cylinder, and the third-stage rotating cylinder is in transmission connection with the vibration sorting frame. And the third-stage rotating cylinder is rotationally connected with the vibration selection frame, a differential part is installed on the vibration selection frame, and the inner selection shaft, the second-stage rotating cylinder and the third-stage rotating cylinder are linked through the differential part. According to the plastic bottle piece screening device, through the spiral structure arrangement of the first-stage spiral screening piece, the second-stage spiral screening piece and the third-stage spiral screening piece, layer-by-layer and repeated screening during plastic bottle piece sorting can be achieved, and the layer-by-layer and repeated screening effect of the plastic bottle pieces is achieved; therefore, the sorting precision of the plastic bottle pieces is effectively improved, and the missing sorting rate and the wrong sorting rate during sorting of the plastic bottle pieces are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting devices, and more particularly to a multi-stage sorting device for plastic bottle flakes. Background Art

[0002] After the plastic bottles are crushed, they will form plastic bottle flakes. During the subsequent processing, the plastic bottle flakes need to be sorted into multiple levels according to the particles;

[0003] In the prior art, the patent document with the publication number CN214812567U discloses a vibrating screen for plastic particle sorting, comprising a frame, a sieve plate provided on the frame, a vibration motor provided on the frame, sieve holes provided on the sieve plate, a fixed plate provided on both sides of the sieve plate along the length direction, and a first dredging member and a second dredging member for dredging the sieve holes provided on the sieve plate. By adopting the above technical scheme, during the screening of plastic particles, the operator pours the plastic particles onto the sieve plate, the operator starts the vibration motor, and the vibration motor vibrates the sieve plate, thereby screening the plastic particles through the sieve holes. At this time, the operator can dredge the sieve holes through the first dredging member and the second sieving member to reduce the occurrence of sieve hole blockage, thereby improving the screening efficiency of plastic particles. However, the above device is not convenient for improving the sorting accuracy of plastic bottle flakes and reducing the omission and misselection rate of plastic bottle flakes during the sorting of plastic bottle flakes through layers and repeated screening when using the device. Based on this, the present invention provides a multi-stage sorting device for plastic bottle flakes to solve the technical problems raised in the above background technology. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a multi-stage sorting device for plastic bottle flakes. Through the spiral structure arrangement of the first-stage spiral screen, the second-stage spiral screen and the third-stage spiral screen, layer-by-layer and repeated screening can be achieved during the sorting of plastic bottle flakes. By achieving the layer-by-layer and repeated screening effect of the plastic bottle flakes, the sorting accuracy of the plastic bottle flakes is effectively improved and the omission and wrong selection rates during the sorting of plastic bottle flakes are reduced.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage sorting device for plastic bottle flakes, comprising a frame, a vibration generating component is installed on the frame, the vibration generating component is transmission-connected with a vibrating frame and an inner selection shaft, a secondary rotary drum is rotatably sleeved on the inner selection shaft, a third rotary drum is rotatably sleeved on the second rotary drum, the third rotary drum is rotationally connected with the vibrating frame, a differential is installed on the vibrating frame, the inner selection shaft, the secondary rotary drum and the third rotary drum are linked by the differential, a primary spiral screen is fixedly installed on the inner selection shaft, the primary spiral screen is evenly distributed with primary sieve holes, the primary spiral screen is connected to the secondary rotary drum The drum rotates and fits together, the secondary drum is provided with an internal guide component, the outer wall of the secondary drum is installed with a secondary spiral screen, the secondary spiral screen is rotationally fitted with the tertiary drum, the secondary spiral screen is evenly distributed with secondary sieve holes, the tertiary drum is installed with an external guide component, the tertiary drum is fixedly installed with a tertiary spiral screen, the tertiary spiral screen is evenly distributed with tertiary sieve holes, a sorting drum is fixedly installed on the bottom surface of the vibration frame, the tertiary spiral screen is rotationally fitted with the sorting drum, and the frame is respectively installed with wind pressure components and screening material discharge components adapted to the primary spiral screen, the secondary spiral screen and the tertiary spiral screen.

[0006] As a preferred technical solution of the present invention, the vibration generating component includes a servo motor fixedly connected to the frame, a transmission main shaft and a reciprocating shaft rotatably connected to the frame, the output shaft end of the servo motor is transmission-connected to the transmission main shaft, the inner selection shaft and the reciprocating shaft are both driven by the transmission main shaft, a reciprocating tooth plate is fixedly mounted on the vibration selection frame, a half-face gear transmission-connected to the reciprocating tooth plate is fixedly mounted on the reciprocating shaft, two symmetrically arranged T-shaped guide rods are fixedly mounted on the frame, the two T-shaped guide rods are both slidably connected to the frame, and the two T-shaped guide rods and the positions corresponding to the top of the frame are both sleeved with reciprocating springs.

[0007] As a preferred technical solution of the present invention, bevel gears a are fixedly installed on the transmission main shaft and the reciprocating shaft, and the two bevel gears a are meshed with each other. A transmission guide groove with an opening at the bottom end and transmission-connected to the inner selection shaft is fixedly provided inside the transmission main shaft, and a linkage section slidingly connected to the transmission guide groove is fixedly provided on the top of the inner selection shaft, and the cross-sections of the linkage section and the transmission guide groove are both regular polygons.

[0008] As a preferred technical solution of the present invention, the differential member includes a differential shaft rotatably connected to the vibrating frame, and a bevel gear b and a bevel gear c are respectively fixedly installed on the differential shaft. Upper bevel gears are fixedly installed on the inner selection shaft and the secondary rotor, and the two upper bevel gears are both transmission connected to the bevel gear b. The two upper bevel gears are symmetrically arranged with the horizontal plane where the axis of the differential shaft is located as the axis, and a lower bevel gear transmission connected to the bevel gear c is fixedly installed on the third-stage rotor.

[0009] As a preferred technical solution of the present invention, the internal guide assembly includes a guide ring cavity a, the inner upper part of the secondary vortex is provided with a group of screen material flow ports a distributed in a circular array, and the outer lower part of the secondary vortex is provided with a group of screen material discharge ports a distributed in a circular array.

[0010] As a preferred technical solution of the present invention, the external guide assembly includes a guide ring cavity b, the inner upper part of the three-stage rotor is provided with a group of screen material flow ports b distributed in a circular array, and the outer lower part of the three-stage rotor is provided with a group of screen material discharge ports b distributed in a circular array.

[0011] As a preferred technical solution of the present invention, the screening material discharge assembly includes a waste material discharge box fixedly connected to the sorting cylinder, the bottom of the sorting cylinder is respectively fixedly installed with a screening material guide cylinder a and a screening material guide cylinder b, the screening material guide cylinder a is rotatably connected to the secondary rotary cylinder, the screening material guide cylinder a is connected to the screening material discharge area of ​​the primary sieve hole, the bottom end of the screening material guide cylinder a is fixedly provided with a primary screening material outlet, the screening material guide cylinder b is rotatably connected to the tertiary rotary cylinder, the bottom end of the sorting cylinder is fixedly connected to the screening material guide cylinder b, and the screening material guide cylinder a is installed with a secondary discharge The screen material guide cylinder b is fixedly provided with a tertiary row box, and the tertiary row box is connected with the sieve material discharge area of ​​the tertiary sieve hole. The screen material guide cylinder a is fixedly provided with a feed box, and a group of scattering shafts are rotatably connected inside the feed box, and a group of scattering plates are fixedly installed on the scattering shafts. The vibration frame is rotatably connected with a side shaft, and the side shaft is transmission-connected to the reciprocating shaft through a first chain belt, and the side shaft is transmission-connected with a second chain belt, and each of the scattering shafts is driven by the second chain belt.

[0012] As a preferred technical solution of the present invention, the axes of the primary sieve holes, the secondary sieve holes and the tertiary sieve holes are parallel, the axis of the primary sieve holes is perpendicular to the horizontal plane, the primary sieve holes, the secondary sieve holes and the tertiary sieve holes are all circular holes, the aperture of the tertiary sieve holes is 1.5 times the aperture of the secondary sieve holes, and the aperture of the secondary sieve holes is 1.5 times the aperture of the primary sieve holes.

[0013] As a preferred technical solution of the present invention, the wind pressure component includes a high-pressure fan fixed on the frame, a pressure supply chamber is fixedly opened on the inner shaft, the air outlet port of the high-pressure fan is connected with the pressure supply chamber through a pipe, and the secondary rotor, the tertiary rotor and the sorting cylinder are all provided with a pressure dividing ring chamber connected with the pressure supply chamber, and a group of high-pressure spray holes distributed in a circular array are opened on the secondary rotor and corresponding to the position directly above the first-stage spiral screen, the tertiary rotor and the position directly above the second-stage spiral screen, and the sorting cylinder and the position directly above the third-stage spiral screen, and each of the high-pressure spray holes is connected to the pressure dividing ring chamber at the corresponding position.

[0014] As a preferred technical solution of the present invention, a guide ring slidably connected to the sorting barrel is fixedly installed on the frame, and a limit ring is provided at a position above the sorting barrel corresponding to the guide ring. A limit spring is installed between the guide ring and the limit ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. During the sorting operation of the present invention, the material conveying directions of the first-stage spiral screen, the second-stage spiral screen and the third-stage spiral screen are all upward. When the first-stage spiral screen, the second-stage spiral screen and the third-stage spiral screen rotate, vibration of a set frequency occurs at the same time. Through the spiral structure setting of the first-stage spiral screen, the second-stage spiral screen and the third-stage spiral screen, layer-by-layer and repeated screening can be achieved during the sorting of plastic bottle flakes. By achieving the layer-by-layer and repeated screening effect of plastic bottle flakes, the sorting accuracy of plastic bottle flakes is effectively improved, and the omission and wrong selection rates of plastic bottle flakes are reduced during the sorting, thereby effectively improving the sorting effect of plastic bottle flakes.

[0017] 2. During the sorting operation of the present invention, the high-pressure fan discharges high-pressure air. After the high-pressure fan discharges high-pressure air, the screening efficiency of the plastic bottle pieces through the primary sieve holes, the secondary sieve holes and the tertiary sieve holes is effectively improved, and the probability of the primary sieve holes, the secondary sieve holes and the tertiary sieve holes being blocked is effectively reduced, thereby maintaining the sorting efficiency of the present device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a multi-stage sorting device for plastic bottle flakes according to the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0020] Figure 3 For the present invention Figure 1 A schematic diagram of the structure from another perspective;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0022] Figure 5 For the present invention Figure 1 A schematic cross-sectional structure diagram of ;

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the local enlarged structure at C in the middle;

[0024] Figure 7 For the present invention Figure 5 A schematic diagram of the local enlarged structure at D in the middle;

[0025] Figure 8 For the present invention Figure 5 A schematic diagram of the local enlarged structure at E in the middle;

[0026] Fig. 9 For the present invention Figure 5 A schematic diagram of the local enlarged structure at F in the middle;

[0027] Fig.10 For the present invention Figure 5 A schematic diagram of the local enlarged structure at G in the middle;

[0028] Fig.11 For the present invention Figure 5 Schematic diagram of the local enlarged structure at H in the middle;

[0029] Fig.12 It is a schematic diagram of the structure of the three-stage rotor of the present invention;

[0030] Fig.13 It is a schematic diagram of the structure of the secondary rotor of the present invention.

[0031] In the figure: 1, frame; 2, vibrating frame; 3, inner selection shaft; 4, secondary rotary drum; 5, tertiary rotary drum; 6, primary spiral screen; 7, primary screen hole; 8, secondary spiral screen; 9, secondary screen hole; 10, tertiary spiral screen; 11, tertiary screen hole; 12, sorting drum; 13, servo motor; 14, transmission main shaft; 15, reciprocating shaft; 16, reciprocating tooth plate; 17, half-face gear; 18, T-shaped guide rod; 19, reciprocating spring; 20, differential shaft; 21, guide ring cavity a ; 22. Screen material flow port a; 23. Screen material discharge port a; 24. Guide ring cavity b; 25. Screen material flow port b; 26. Screen material discharge port b; 27. Waste material discharge box; 28. Screen material guide cylinder a; 29. ​​Screen material guide cylinder b; 30. Secondary discharge box; 31. Third-stage discharge box; 32. Feed box; 33. Breaking shaft; 34. Breaking plate; 35. Side shaft; 36. High-pressure fan; 37. Pressure supply cavity; 38. Pressure dividing ring cavity; 39. High-pressure spray hole; 40. Guide ring; 41. Limit spring. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figures 1 to 13 As shown, the present invention provides a multi-stage sorting device for plastic bottle flakes, comprising a frame 1, on which a vibration generating component is mounted, and the vibration generating component is drivingly connected to a vibration selection frame 2 and an inner selection shaft 3;

[0034] The vibration generating component includes a servo motor 13 fixedly connected to the frame 1, a transmission main shaft 14 and a reciprocating shaft 15 rotatably connected to the frame 1, and the output shaft end of the servo motor 13 is transmission-connected to the transmission main shaft 14;

[0035] The servo motor 13 and the transmission main shaft 14 are both equipped with driving bevel gears, and the two driving bevel gears are meshed with each other;

[0036] The inner selection shaft 3 and the reciprocating shaft 15 are both driven by the transmission main shaft 14;

[0037] Bevel gears a are fixedly mounted on the transmission main shaft 14 and the reciprocating shaft 15, and the two bevel gears a mesh with each other;

[0038] A transmission guide groove with a bottom opening and transmission connection to the inner selection shaft 3 is fixedly provided inside the transmission main shaft 14, and a linkage section slidingly connected to the transmission guide groove is fixedly provided on the top of the inner selection shaft 3, and the cross sections of the linkage section and the transmission guide groove are both regular polygons;

[0039] By setting the regular polygonal cross section of the transmission guide groove and the linkage section, the transmission main shaft 14 can continuously drive the inner selection shaft 3 when the vibration selection frame 2 moves up and down;

[0040] A reciprocating toothed plate 16 is fixedly mounted on the vibration frame 2, a half-face gear 17 transmission-connected to the reciprocating toothed plate 16 is fixedly mounted on the reciprocating shaft 15, two symmetrically arranged T-shaped guide rods 18 are fixedly mounted on the frame 1, both T-shaped guide rods 18 are slidingly connected to the frame 1, and both T-shaped guide rods 18 and corresponding positions above the frame 1 are sleeved with reciprocating springs 19.

[0041] After the transmission main shaft 14 works, the reciprocating shaft 15 is driven, and after the reciprocating shaft 15 is driven, the half-face gear 17 is driven to rotate. After the half-face gear 17 rotates, the reciprocating spring 19 and the reciprocating tooth plate 16 are set, so that the vibration selection frame 2 can reciprocate up and down within the set stroke. Through the reciprocating motion of the reciprocating frame, the vibration screening operation of the sorting device is realized;

[0042] A secondary rotor 4 is rotatably sleeved on the inner selection shaft 3, a tertiary rotor 5 is rotatably sleeved on the secondary rotor 4, the tertiary rotor 5 is rotatably connected to the vibration selection frame 2, a differential is installed on the vibration selection frame 2, and the inner selection shaft 3, the secondary rotor 4 and the tertiary rotor 5 are linked through the differential;

[0043] The differential member includes a differential shaft 20 rotatably connected to the vibration frame 2, and a bevel gear b and a bevel gear c are fixedly mounted on the differential shaft 20, and upper bevel gears are fixedly mounted on the inner selection shaft 3 and the secondary rotary cylinder 4, and the two upper bevel gears are both transmission-connected to the bevel gear b, and the two upper bevel gears are symmetrically arranged with the horizontal plane where the axis of the differential shaft is located as the axis;

[0044] By setting the positions of the two upper bevel gears, the rotation directions of the secondary rotor 4 and the inner selection shaft 3 are opposite;

[0045] A lower bevel gear connected to the bevel gear c is fixedly mounted on the third-stage rotary drum 5;

[0046] By setting the lower bevel gear and the bevel gear c, the rotation speed of the third-stage rotor 5 is different from that of the second-stage rotor 4;

[0047] A primary spiral screen piece 6 is fixedly mounted on the inner selection shaft 3, and primary screen holes 7 are evenly distributed on the primary spiral screen piece 6. The primary spiral screen piece 6 is rotatably fitted with the secondary rotary drum 4;

[0048] An inner flow guide assembly is provided on the secondary vortex drum 4, and a secondary spiral screen 8 is installed on the outer wall of the secondary vortex drum 4;

[0049] The inner guide assembly includes a vertically arranged guide ring cavity a21, a group of sieve flow ports a22 distributed in a circular array are opened in the inner upper part of the secondary vortex 4, and a group of sieve discharge ports a23 distributed in a circular array are opened in the outer lower part of the secondary vortex 4.

[0050] The screening material flow port a22 is used to flow out the plastic bottle flakes intercepted by the primary screen hole 7. The plastic bottle flakes intercepted by the primary screen hole 7 finally enter the material extraction and screening area of ​​the secondary spiral screen plate 8 through the guide ring cavity a21 and the screening material flow port a22.

[0051] The secondary spiral screen 8 is rotatably fitted with the tertiary rotary drum 5, and the secondary spiral screen 8 is evenly distributed with secondary screen holes 9. An external flow guide assembly is installed in the tertiary rotary drum 5, and a tertiary spiral screen 10 is fixedly installed on the tertiary rotary drum 5;

[0052] The outer flow guide assembly includes a flow guide annular cavity b24, a group of sieve material flow ports b25 distributed in a circumferential array are opened in the inner upper part of the third-stage cyclone 5, and a group of sieve material discharge ports b26 distributed in a circumferential array are opened in the outer lower part of the third-stage cyclone 5;

[0053] The screening material flow port b25 is used to flow out the plastic bottle flakes intercepted by the secondary screen hole 9. The plastic bottle flakes intercepted by the secondary screen hole 9 finally enter the material extraction and screening area of ​​the third-stage spiral screen plate 10 through the guide ring cavity b24 and the screening material flow port b25.

[0054] The three-stage spiral screen 10 is evenly distributed with three-stage screen holes 11, and a separation cylinder 12 is fixedly installed on the bottom surface of the vibration frame 2, and the three-stage spiral screen 10 is rotatably fitted with the separation cylinder 12;

[0055] The axes of the primary sieve hole 7, the secondary sieve hole 9 and the tertiary sieve hole 11 are parallel, the axis of the primary sieve hole 7 is perpendicular to the horizontal plane, the primary sieve hole 7, the secondary sieve hole 9 and the tertiary sieve hole 11 are all circular holes, the aperture of the tertiary sieve hole 11 is 1.5 times the aperture of the secondary sieve hole 9, and the aperture of the secondary sieve hole 9 is 1.5 times the aperture of the primary sieve hole 7;

[0056] By setting the primary sieve hole 7, the secondary sieve hole 9 and the tertiary sieve hole 11, the plastic bottle flakes can be graded and screened;

[0057] During the sorting operation, the material conveying directions of the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10 are all upward. When the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10 rotate, vibration of a set frequency occurs at the same time. Through the spiral structure setting of the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10, layer-by-layer and repeated screening can be achieved during the sorting of plastic bottle flakes. By achieving the layer-by-layer and repeated screening effect of the plastic bottle flakes, the sorting accuracy of the plastic bottle flakes is effectively improved and the omission and misselection rates of the plastic bottle flakes are reduced during the sorting, thereby effectively improving the sorting effect of the plastic bottle flakes;

[0058] Wind pressure components and screening material discharge components adapted to the first-stage spiral screen 6 , the second-stage spiral screen 8 and the third-stage spiral screen 10 are respectively installed on the frame 1 .

[0059] The screening material discharging assembly includes a waste material discharging box 27 fixedly connected to the sorting cylinder 12, and the bottom of the sorting cylinder 12 is respectively fixedly installed with a screening material guide cylinder a28 and a screening material guide cylinder b29, the screening material guide cylinder a28 is rotatably connected to the secondary rotary cylinder 4, and the screening material guide cylinder a28 is connected to the screening material discharging area of ​​the primary sieve hole 7;

[0060] A first-level screening outlet is fixedly provided at the bottom end of the screening guide cylinder a28;

[0061] The screening material guide cylinder b29 is rotatably connected to the tertiary rotary cylinder 5, the bottom end of the sorting cylinder 12 is fixedly connected to the screening material guide cylinder b29, a secondary row box 30 is installed on the screening material guide cylinder a28, the secondary row box 30 is connected to the screening material discharge area of ​​the secondary sieve hole 9, a tertiary row box 31 is fixedly installed on the screening material guide cylinder b29, the tertiary row box 31 is connected to the screening material discharge area of ​​the tertiary sieve hole 11, a feed box 32 is fixedly connected to the screening material guide cylinder a28, a group of breaking up shafts 33 are rotatably connected inside the feed box 32, a group of breaking up plates 34 are fixedly installed on the breaking up shafts 33, a side shaft 35 is rotatably connected to the vibration frame 2, the side shaft 35 is transmission connected to the reciprocating shaft 15 through a first chain belt, the side shaft 35 is transmission connected to the second chain belt, and each breaking up shaft 33 is driven by the second chain belt.

[0062] The wind pressure component includes a high-pressure fan 36 fixed on the frame 1, and a pressure supply chamber 37 is fixedly opened on the inner shaft. The air outlet port of the high-pressure fan 36 is connected with the pressure supply chamber 37 through a pipeline. The secondary rotor 4, the tertiary rotor 5 and the sorting cylinder 12 are all provided with a pressure dividing ring chamber 38 connected with the pressure supply chamber 37. A group of high-pressure spray holes 39 distributed in a circular array are opened on the secondary rotor 4 and corresponding to the position directly above the primary spiral screen 6, the tertiary rotor 5 and the position directly above the secondary spiral screen 8, and the sorting cylinder 12 and the position directly above the tertiary spiral screen 10, and each high-pressure spray hole 39 is connected to the pressure dividing ring chamber 38 at the corresponding position.

[0063] During the sorting operation, the high-pressure fan 36 discharges high-pressure air. After the high-pressure fan 36 discharges high-pressure air, the screening efficiency of the plastic bottle pieces from the primary sieve hole 7, the secondary sieve hole 9 and the tertiary sieve hole 11 is effectively improved, and the probability of the primary sieve hole 7, the secondary sieve hole 9 and the tertiary sieve hole 11 being blocked is effectively reduced, thereby maintaining the sorting efficiency of the device;

[0064] A guide ring 40 slidably connected to the sorting drum 12 is fixedly mounted on the frame 1 , and a limiting ring is provided at a position above the sorting drum 12 corresponding to the guide ring 40 , and a limiting spring 41 is installed between the guide ring 40 and the limiting ring.

[0065] The working principle and use process of the present invention:

[0066] During the sorting operation, the material conveying directions of the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10 are all upward. When the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10 rotate, vibration of the set frequency occurs at the same time. The spiral structure of the first-stage spiral screen 6, the second-stage spiral screen 8 and the third-stage spiral screen 10 can realize layer-by-layer and repeated screening during the sorting of plastic bottle flakes. By realizing the layer-by-layer and repeated screening effect of the plastic bottle flakes, the sorting accuracy of the plastic bottle flakes is effectively improved and the omission and misselection rates of the plastic bottle flakes are reduced during the sorting, thereby effectively improving the sorting effect of the plastic bottle flakes. During the sorting operation, the high-pressure fan 36 discharges high-pressure air. After the high-pressure fan 36 discharges high-pressure air, the screening efficiency of the plastic bottle flakes by the first-stage sieve hole 7, the second-stage sieve hole 9 and the third-stage sieve hole 11 is effectively improved, and the probability of the first-stage sieve hole 7, the second-stage sieve hole 9 and the third-stage sieve hole 11 being blocked is effectively reduced, thereby maintaining the sorting efficiency of the device.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sorting device for plastic bottle flakes, comprising a frame (1), characterized in that: The frame (1) is provided with a vibration generating component, and the vibration generating component is drivingly connected with a vibration selection frame (2) and an inner selection shaft (3). A secondary rotor (4) is rotatably sleeved on the inner selection shaft (3), and a tertiary rotor (5) is rotatably sleeved on the secondary rotor (4). The tertiary rotor (5) is rotatably connected with the vibration selection frame (2). A differential is installed on the vibration selection frame (2). The inner selection shaft (3), the secondary rotor (4) and the tertiary rotor (5) are linked via a differential. A primary spiral screen (6) is fixedly installed on the inner selection shaft (3), and primary sieve holes (7) are evenly distributed on the primary spiral screen (6). The primary spiral screen (6) is rotationally fitted with the secondary rotor (4), and an internal flow guide component is provided on the secondary rotor (4). A secondary spiral screen (8) is installed on the outer wall of the secondary rotary drum (4), the secondary spiral screen (8) is rotationally fitted with the tertiary rotary drum (5), the secondary spiral screen (8) is evenly distributed with secondary screen holes (9), an external flow guide component is installed in the tertiary rotary drum (5), a tertiary spiral screen (10) is fixedly installed on the tertiary rotary drum (5), the tertiary spiral screen (10) is evenly distributed with tertiary screen holes (11), a separation drum (12) is fixedly installed on the bottom surface of the vibration selection frame (2), the tertiary spiral screen (10) is rotationally fitted with the separation drum (12), and a wind pressure component and a screening material discharge component adapted to the primary spiral screen (6), the secondary spiral screen (8) and the tertiary spiral screen (10) are respectively installed on the frame (1).

2. A multi-stage sorting device for plastic bottle flakes according to claim 1, characterized in that: The vibration generating component comprises a servo motor (13) fixedly connected to the frame (1), a transmission main shaft (14) and a reciprocating shaft (15) rotatably connected to the frame (1); the output shaft end of the servo motor (13) is transmission-connected to the transmission main shaft (14); the inner selection shaft (3) and the reciprocating shaft (15) are both driven by the transmission main shaft (14); a reciprocating tooth plate (16) is fixedly mounted on the vibration selection frame (2); a half-face gear (17) transmission-connected to the reciprocating tooth plate (16) is fixedly mounted on the reciprocating shaft (15); two symmetrically arranged T-shaped guide rods (18) are fixedly mounted on the frame (1); the two T-shaped guide rods (18) are both slidably connected to the frame (1); and the two T-shaped guide rods (18) are sleeved with reciprocating springs (19) at positions corresponding to the top of the frame (1).

3. A multi-stage sorting device for plastic bottle flakes according to claim 2, characterized in that: The transmission main shaft (14) and the reciprocating shaft (15) are both fixedly mounted with bevel gears a, the two bevel gears a meshing with each other, the transmission main shaft (14) is fixedly provided with a transmission guide groove with a bottom opening and transmission-connected to the inner selection shaft (3), the top of the inner selection shaft (3) is fixedly provided with a linkage section slidably connected to the transmission guide groove, and the cross-sections of the linkage section and the transmission guide groove are both regular polygons.

4. A multi-stage sorting device for plastic bottle flakes according to claim 3, characterized in that: The differential member comprises a differential shaft (20) rotatably connected to the vibration frame (2), a bevel gear b and a bevel gear c being fixedly mounted on the differential shaft (20), an upper bevel gear being fixedly mounted on the inner selection shaft (3) and the secondary rotary drum (4), the two upper bevel gears being both transmission-connected to the bevel gear b, the two upper bevel gears being symmetrically arranged with the horizontal plane where the axis of the differential shaft is located as the axis, and a lower bevel gear being transmission-connected to the bevel gear c being fixedly mounted on the tertiary rotary drum (5).

5. A multi-stage sorting device for plastic bottle flakes according to claim 4, characterized in that: The inner flow guide component comprises a flow guide annular cavity a (21), a group of sieve material flow openings a (22) distributed in a circumferential array are opened on the inner upper part of the secondary cyclone (4), and a group of sieve material discharge openings a (23) distributed in a circumferential array are opened on the outer lower part of the secondary cyclone (4).

6. A multi-stage sorting device for plastic bottle flakes according to claim 5, characterized in that: The outer flow guide assembly comprises a flow guide annular cavity b (24), a group of sieve material flow openings b (25) distributed in a circumferential array are opened on the inner upper part of the three-stage vortex drum (5), and a group of sieve material discharge openings b (26) distributed in a circumferential array are opened on the outer lower part of the three-stage vortex drum (5).

7. A multi-stage sorting device for plastic bottle flakes according to claim 6, characterized in that: The screening material discharge assembly comprises a waste material discharge box (27) fixedly connected to the sorting drum (12); a screening material guide cylinder a (28) and a screening material guide cylinder b (29) are fixedly installed at the bottom of the sorting drum (12); the screening material guide cylinder a (28) is rotatably connected to the secondary rotary drum (4); the screening material guide cylinder a (28) is connected to the screening material discharge area of ​​the primary sieve hole (7); a primary screening material outlet is fixedly arranged at the bottom end of the screening material guide cylinder a (28); the screening material guide cylinder b (29) is rotatably connected to the tertiary rotary drum (5); the bottom end of the sorting drum (12) is fixedly connected to the screening material guide cylinder b (29); a secondary discharge box (30) is installed on the screening material guide cylinder a (28); the secondary discharge box (30) The screen material discharging area is connected with the secondary screen hole (9); a third-level discharging box (31) is fixedly installed on the screen material guide cylinder b (29); the third-level discharging box (31) is connected with the screen material discharging area of ​​the third-level screen hole (11); the screen material guide cylinder a (28) is fixedly connected with a feed box (32); a group of scattering shafts (33) are rotatably connected inside the feed box (32); a group of scattering plates (34) are fixedly installed on the scattering shafts (33); a side shaft (35) is rotatably connected to the vibration frame (2); the side shaft (35) is transmission-connected to the reciprocating shaft (15) through a first chain belt; the side shaft (35) is transmission-connected to a second chain belt; each of the scattering shafts (33) is driven by the second chain belt.

8. The multi-stage sorting device for plastic bottle flakes according to claim 7, characterized in that: The axes of the primary sieve hole (7), the secondary sieve hole (9) and the tertiary sieve hole (11) are parallel, the axis of the primary sieve hole (7) is perpendicular to the horizontal plane, the primary sieve hole (7), the secondary sieve hole (9) and the tertiary sieve hole (11) are all circular holes, the aperture of the tertiary sieve hole (11) is 1.5 times the aperture of the secondary sieve hole (9), and the aperture of the secondary sieve hole (9) is 1.5 times the aperture of the primary sieve hole (7).

9. A multi-stage sorting device for plastic bottle flakes according to claim 8, characterized in that: The wind pressure component comprises a high-pressure fan (36) fixed on the frame (1), a pressure supply chamber (37) is fixedly provided on the inner shaft, an air outlet port of the high-pressure fan (36) is connected to the pressure supply chamber (37) through a pipeline, and the secondary rotor (4), the tertiary rotor (5) and the separation cylinder (12) are all provided with a pressure dividing ring chamber (38) connected to the pressure supply chamber (37), and a group of high-pressure spray holes (39) distributed in a circular array are provided on the secondary rotor (4) and at a position corresponding to the position directly above the primary spiral screen (6), the tertiary rotor (5) and at a position corresponding to the position directly above the secondary spiral screen (8), and the separation cylinder (12) and at a position corresponding to the position directly above the tertiary spiral screen (10), and each of the high-pressure spray holes (39) is connected to the pressure dividing ring chamber (38) at a corresponding position.

10. A multi-stage sorting device for plastic bottle flakes according to claim 9, characterized in that: A guide ring (40) slidably connected to a sorting barrel (12) is fixedly mounted on the frame (1); a limit ring is provided on the sorting barrel (12) at a position corresponding to the upper portion of the guide ring (40); and a limit spring (41) is installed between the guide ring (40) and the limit ring.

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