Multi-stage screening device for crushed plastic bottle materials

Abstract

The utility model relates to the technical field of screening devices, and discloses a plastic bottle broken material multi-stage screening device which comprises a frame body, two screening mechanisms are installed on the frame body, the two screening mechanisms are arranged in a mirroring and staggered height mode, and a transmission mechanism for driving the two screening mechanisms to reciprocate left and right in a staggered mode is installed on the frame body. The reciprocating displacement directions of the two screening mechanisms are opposite, each screening mechanism comprises a screening shell in sliding connection with the frame body, a set of elastic reset pieces are installed between the opposite surfaces of the screening shell and the frame body, a guide module in linkage with the transmission mechanism is installed in the screening shell, and the screening shell is in transmission connection with an annular filter screen through the guide module. After the double-shaft motor outputs the rotating speed, on one hand, the two screen shells are driven to move left and right in a staggered and reciprocating mode, then swing type dynamic screening of plastic crushing materials to be screened is achieved, and on the other hand, the two annular filter screens are driven to rotate at the same speed in the opposite directions, so that the screening time, the screening degree and the screening strength of the plastic crushing materials are effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, and more specifically, to a multi-stage screening device for broken plastic bottles. Background Art

[0002] After the plastic is crushed, the crushed materials need to be screened;

[0003] In the prior art, the patent document with publication number CN213797557U discloses a multi-stage screening device for plastic masterbatch, including a bottom plate, a fixed box is fixedly connected to the top surface of the bottom plate, a cover plate is provided on the top surface of the fixed box, a feed funnel is fixedly connected to the top surface of the cover plate, a side groove is provided on the side of the fixed box, and a sleeve frame is movably sleeved inside the fixed box. The above device is provided with a primary sieve plate inside the fixed box, and a secondary sieve plate is additionally provided inside the fixed box below the primary sieve plate, so that the secondary sieve plate is trapezoidal in shape. When the masterbatch after primary screening falls on the inclined secondary sieve plate, the masterbatch is subjected to the action of gravity and rolls downward, extending the distance of the crushed masterbatch to be screened out, improving the screening effect, and having a good use effect. However, the above device has the following technical problems in Jining screening operation:

[0004] 1. The existing device, on the basis of realizing multi-stage screening of crushed materials, cannot effectively control the screening time, screening degree and screening intensity of crushed materials through screening time control within a unit space;

[0005] 2. The existing device cannot synchronously realize the swing screening of the crushed material and the rotation of the screen through a single motor, and then realize dynamic screening;

[0006] 3. The existing device is not convenient for realizing self-maintenance of the screening structure simultaneously during dynamic screening;

[0007] Based on this, the utility model provides a multi-stage screening device for broken plastic bottles to solve the technical problems raised in the above-mentioned background technology. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, the utility model provides a multi-stage screening device for plastic bottle crushed materials. The utility model can realize the bipolar screening operation of plastic crushed materials. When the screening operation is in progress, the dual-axis motor outputs the speed at a set power. After the dual-axis motor outputs the speed, on the one hand, it drives the two screen shells to move back and forth left and right in an offset manner, thereby realizing the swinging dynamic screening of the plastic crushed materials to be screened, so as to effectively improve the dispersion and screening efficiency of the plastic crushed materials. On the other hand, it drives the two annular filter screens to rotate in opposite directions at the same speed. The speed setting of the two annular filter screens can effectively control the screening time, screening degree and screening intensity of the plastic crushed materials.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage screening device for broken plastic bottles, comprising a frame, on which two screening mechanisms are mounted, the two screening mechanisms are mirror images and are arranged at staggered heights, and a transmission mechanism is mounted on the frame to drive the two screening mechanisms to reciprocate left and right, and the reciprocating displacement directions of the two screening mechanisms are opposite;

[0010] The screening mechanism includes a sieve shell slidably connected to the frame, a group of elastic reset parts are installed between the relative surfaces of the sieve shell and the frame, a guide module linked to the transmission mechanism is installed in the sieve shell, the sieve shell is connected to an annular filter through the guide module, the rotation speed of the annular filter is 0.8 times the reciprocating movement speed of the screening mechanism, the annular filter is evenly distributed with sieve holes for filtering broken plastic bottles, the apertures of the sieve holes on the two screening mechanisms are different, a sieve material discharge box is installed on the inner wall of the sieve shell and at a position corresponding to the inner side of the annular filter, the discharge port of the upper sieve material discharge box is connected to the guide box, the side of the sieve shell is connected to the discharge nozzle, and an anti-cleaning component for recoil cleaning of the sieve holes is installed in the sieve shell.

[0011] As a preferred technical solution of the utility model, the guide module includes four guide rollers rotatably connected to the inner surface of the screen shell, and each of the guide rollers is drivingly connected to the annular filter screen.

[0012] As a preferred technical solution of the utility model, the aperture of the sieve holes in the upper screening mechanism is 1.5 to 3 times the aperture of the sieve holes in the lower screening mechanism.

[0013] As an optimal technical scheme of the utility model, the transmission mechanism includes a double-axis motor fixed on the frame, two tensioning blocks slidably connected to the frame and two driven gear plates arranged in a mirror image and staggered manner, the output shaft end of the double-axis motor is fixedly installed with a half gear, the two driven gear plates are both transmission connected to the half gear, the other output shaft end of the double-axis motor is transmission connected to the first chain belt, tensioning springs are installed between the relative surfaces of the two tensioning blocks and between the relative surfaces of the two tensioning blocks and the frame, the two tensioning blocks are rotatably connected with a tensioning shaft, the two tensioning shafts are linked by a second chain belt, the side of one of the sieve shells is rotatably connected with a counter-coupling shaft, the counter-coupling shaft and the guide roller at the sieve shell are fixedly installed with linkage gears, the two linkage gears are meshed with each other, and the counter-coupling shaft and the guide roller at the other sieve shell are both transmission connected to the second chain belt.

[0014] As a preferred technical solution of the utility model, the two driven gear plates are respectively arranged on both sides of the half gear.

[0015] As a preferred technical solution of the utility model, the anti-cleaning component includes an anti-cleaning pump fixed to the side of the sieve shell and an anti-cleaning nozzle fixed between the inner surface of the sieve shell and arranged on the inner side of the annular filter. A waste guide box for receiving anti-cleaning waste is installed on the bottom surface of the sieve shell and corresponding to the position below the annular filter. The air outlet port of the anti-cleaning pump is fixedly connected to the anti-cleaning nozzle. The bottom surface of the anti-cleaning nozzle is evenly distributed with a group of regularly distributed anti-cleaning spray holes with the air outlet direction facing the annular filter. The air inlet port of the anti-cleaning pump is installed with a filter.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The utility model can realize the bipolar screening operation of plastic crushed materials. When the screening operation is in progress, the dual-axis motor outputs the speed at the set power. After the dual-axis motor outputs the speed, on the one hand, it drives the two screen shells to move back and forth left and right in a staggered manner, thereby realizing the swing-type dynamic screening of the plastic crushed materials to be screened, so as to effectively improve the dispersion and screening efficiency of the plastic crushed materials. On the other hand, it drives the two annular filter screens to rotate at the same speed in opposite directions. Through the speed setting of the two annular filter screens, the screening time, screening degree and screening intensity of the plastic crushed materials can be effectively controlled.

[0018] 2. The utility model sets the rotating structure of the annular filter screen so that the sieve holes on the annular filter screen can be cyclically cleaned by the anti-cleaning spray holes, thereby maintaining the high filtering performance of the annular filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a multi-stage screening device for broken plastic bottles of the utility model;

[0020] Figure 2 For this utility model Figure 1 A schematic diagram of the structure from another perspective;

[0021] Figure 3 For this utility model Figure 2 A schematic diagram of the partial enlarged structure of the plastic crushing material in the middle;

[0022] Figure 4 For this utility model Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the screening material discharging box and the elastic reset member of the utility model;

[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the local enlarged structure at point C in the middle.

[0025] In the figure: 1. frame; 2. sieve shell; 3. elastic reset part; 4. annular filter; 5. sieve material discharge box; 6. material guide box; 7. discharge nozzle; 8. guide roller; 9. double-axis motor; 10. tensioning block; 11. driven gear plate; 12. half gear; 13. tensioning spring; 14. tensioning shaft; 15. counter-coupling shaft; 16. linkage gear; 17. anti-cleaning pump; 18. anti-cleaning spray pipe; 19. waste guide box; 20. anti-cleaning spray hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 6 As shown, the utility model provides a multi-stage screening device for broken plastic bottles, comprising a frame 1, on which two screening mechanisms are mounted, the two screening mechanisms are mirror images and are arranged at staggered heights, and a transmission mechanism is mounted on the frame 1 to drive the two screening mechanisms to reciprocate left and right;

[0028] The screening mechanism comprises a sieve shell 2 slidably connected to the frame 1, a group of elastic reset members 3 are installed between the relative surfaces of the sieve shell 2 and the frame 1, a guide module linked to the transmission mechanism is installed in the sieve shell 2, and the sieve shell 2 is connected to the annular filter screen 4 through the guide module, and the rotation speed of the annular filter screen 4 is 0.8 times the reciprocating speed of the screening mechanism;

[0029] The guide module includes four guide rollers 8 rotatably connected to the inner surface of the sieve shell 2, and each guide roller 8 is drivingly connected to the annular filter screen 4;

[0030] By setting the rotation speed of the annular filter 4 and the reciprocating displacement speed of the screening mechanism, the plastic crushed materials can be reciprocated left and right during the screening operation. By achieving the reciprocating swing effect of the plastic crushed materials, the screening efficiency of the plastic crushed materials can be effectively improved;

[0031] The annular filter screen 4 is evenly distributed with sieve holes for filtering the broken plastic bottles, and the apertures of the sieve holes on the two screening mechanisms are different;

[0032] The aperture of the sieve holes in the upper screening mechanism is 1.5 times the aperture of the sieve holes in the lower screening mechanism;

[0033] By setting the aperture of the sieve holes in the two screening mechanisms, bipolar filtration of the plastic bottle crushed materials can be achieved;

[0034] A sieve material discharge box 5 is installed on the inner wall of the sieve shell 2 and at a position corresponding to the inner side of the annular filter screen 4. The discharge port of the upper sieve material discharge box 5 is connected to a material guide box 6. The side of the sieve shell 2 is connected to a discharge nozzle 7. A back-cleaning component for back-flushing and self-cleaning the sieve holes is installed in the sieve shell 2.

[0035] The transmission mechanism includes a double-axis motor 9 fixed on the frame 1, two tensioning blocks 10 slidably connected to the frame 1, and two driven gear plates 11 that are mirror-imaged and staggered. A half gear 12 is fixedly installed on the output shaft end of the double-axis motor 9. Both driven gear plates 11 are transmission-connected to the half gear 12. The two driven gear plates 11 are respectively arranged on both sides of the half gear 12.

[0036] The other output shaft end of the dual-axis motor 9 is transmission-connected with the first chain belt, and tensioning springs 13 are installed between the relative surfaces of the two tensioning blocks 10 and between the relative surfaces of the two tensioning blocks 10 and the frame 1, and the two tensioning blocks 10 are rotationally connected with tensioning shafts 14, and the two tensioning shafts 14 are linked through the second chain belt. A counter-coupling shaft 15 is rotationally connected to the side of a sieve shell 2, and linkage gears 16 are fixedly installed on the counter-coupling shaft 15 and on a guide roller 8 at the sieve shell 2, and the two linkage gears 16 are meshed with each other, and the counter-coupling shaft 15 and a guide roller 8 at another sieve shell 2 are transmission-connected with the second chain belt.

[0037] The back-cleaning component includes a back-cleaning pump 17 fixed to the side of the sieve shell 2 and a back-cleaning nozzle 18 fixed between the inner surfaces of the sieve shell 2 and arranged on the inner side of the annular filter screen 4. A waste guide box 19 for receiving back-cleaning waste is installed on the bottom surface of the sieve shell 2 and at a position corresponding to the bottom of the annular filter screen 4. The air outlet port of the back-cleaning pump 17 is fixedly connected to the back-cleaning nozzle 18. A group of regularly distributed back-cleaning spray holes 20 are evenly distributed on the bottom surface of the back-cleaning nozzle 18, and the air outlet direction is facing the annular filter screen 4. A filter is installed on the air inlet port of the back-cleaning pump 17.

[0038] The working principle and use process of this utility model:

[0039] This device is mainly suitable for bipolar screening of plastic crushed materials. During the screening operation, the dual-axis motor 9 outputs the speed at the set power. After the dual-axis motor 9 outputs the speed, on the one hand, it drives the two screen shells 2 to move back and forth in a staggered manner, thereby realizing the swing-type screening of the plastic crushed materials to be screened, so as to effectively improve the dispersion and screening efficiency of the plastic crushed materials. On the other hand, it drives the two annular filter screens 4 to rotate at the same speed in opposite directions. The speed setting of the two annular filter screens 4 can effectively control the screening time, screening degree and screening intensity of the plastic crushed materials. In addition, the rotating structure setting of the annular filter screen 4 allows the sieve holes on the annular filter screen 4 to cyclically accept the back-cleaning cleaning of the back-cleaning spray holes 20, thereby maintaining the high filtering performance of the annular filter screen 4. The primary screening material screened out by the upper screening mechanism enters the lower screening mechanism for secondary screening.

[0040] 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.

[0041] 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 screening device for broken plastic bottles, comprising a frame (1), characterized in that: Two screening mechanisms are mounted on the frame (1), the two screening mechanisms are mirror images and are arranged at staggered heights, and a transmission mechanism is mounted on the frame (1) for driving the two screening mechanisms to reciprocate left and right in a staggered manner, and the reciprocating directions of the two screening mechanisms are opposite; The screening mechanism comprises a sieve shell (2) slidably connected to the frame (1), a group of elastic reset parts (3) are installed between the relative surfaces of the sieve shell (2) and the frame (1), a guide module linked to the transmission mechanism is installed in the sieve shell (2), the sieve shell (2) is connected to the annular filter (4) through the guide module, the rotation speed of the annular filter (4) is 0.8 times the reciprocating movement speed of the screening mechanism, the annular filter (4) is evenly distributed with sieve holes for filtering broken plastic bottles, the apertures of the sieve holes on the two screening mechanisms are different, a sieve material discharge box (5) is installed on the inner wall of the sieve shell (2) and at a position corresponding to the inner side of the annular filter (4), the discharge port of the upper sieve material discharge box (5) is connected to the guide box (6), the side of the sieve shell (2) is connected to the discharge nozzle (7), and the sieve shell (2) is installed with a back-flushing self-cleaning component for the sieve holes.

2. A multi-stage screening device for broken plastic bottles according to claim 1, characterized in that: The guide module comprises four guide rollers (8) rotatably connected to the inner surface of the screen shell (2), and each of the guide rollers (8) is drivingly connected to the annular filter screen (4).

3. The multi-stage screening device for broken plastic bottles according to claim 1, characterized in that: The aperture of the sieve holes in the upper screening mechanism is 1.5 to 3 times the aperture of the sieve holes in the lower screening mechanism.

4. A multi-stage screening device for broken plastic bottles according to claim 2, characterized in that: The transmission mechanism comprises a double-axis motor (9) fixed on the frame (1), two tensioning blocks (10) slidably connected to the frame (1) and two driven gear plates (11) which are mirror-imaged and staggered, a half gear (12) being fixedly mounted on the output shaft end of the double-axis motor (9), both of the two driven gear plates (11) being transmission-connected to the half gear (12), the other output shaft end of the double-axis motor (9) being transmission-connected to the first chain belt, the relative surfaces of the two tensioning blocks (10) and the relative surfaces of the two tensioning blocks (10) and the frame (1) being connected to each other. A tensioning spring (13) is installed between the two tensioning blocks (10), and a tensioning shaft (14) is rotatably connected to the two tensioning blocks (10). The two tensioning shafts (14) are linked by a second chain belt. A side of one of the sieve shells (2) is rotatably connected to a counter-coupling shaft (15). A linkage gear (16) is fixedly installed on the counter-coupling shaft (15) and on a guide roller (8) at the sieve shell (2). The two linkage gears (16) are meshed with each other. The counter-coupling shaft (15) and the guide roller (8) at the other sieve shell (2) are both connected to the second chain belt transmission.

5. The multi-stage screening device for broken plastic bottles according to claim 4, characterized in that: The two driven gear plates (11) are respectively arranged on both sides of the half gear (12).

6. The multi-stage screening device for broken plastic bottles according to claim 1, characterized in that: The back-cleaning component comprises a back-cleaning pump (17) fixed to the side of the sieve shell (2) and a back-cleaning nozzle (18) fixed between the inner surface of the sieve shell (2) and arranged on the inner side of the annular filter (4); a waste guide box (19) for receiving back-cleaning waste is installed on the bottom surface of the sieve shell (2) and at a position corresponding to the bottom of the annular filter (4); the air outlet port of the back-cleaning pump (17) is fixedly connected to the back-cleaning nozzle (18); the bottom surface of the back-cleaning nozzle (18) is evenly distributed with a group of back-cleaning nozzle holes (20) which are regularly distributed and the air outlet direction faces the annular filter (4); and a filter is installed on the air inlet port of the back-cleaning pump (17).

Images