Multistage crushing equipment for polypropylene recovery

Abstract

The utility model relates to the technical field of crushing equipment, in particular to multi-stage crushing equipment for polypropylene recovery, which comprises a shell and a plurality of crushing mechanisms, a feeding hopper is mounted in the middle of the top surface of the shell, and each crushing mechanism comprises two crushing rollers which are rotationally connected in the shell side by side; the multiple screening mechanisms are installed below the crushing mechanisms, each screening mechanism comprises a filter plate installed in the shell through a transverse plate and a spring, and the sizes of filter holes of the multiple filter plates are sequentially reduced from top to bottom; and the conveying mechanism comprises a box body, rotating rollers are rotationally connected to the positions, close to the top end and the bottom end, in the box body, the two rotating rollers are in transmission connection through a conveying belt, and a plurality of partition plates are fixed to the conveying belt at equal intervals. According to the utility model, the plurality of crushing mechanisms and the plurality of screening mechanisms crush polypropylene for multiple times, and then the polypropylene which is not completely crushed is conveyed into the shell again through the conveying mechanism to be crushed again, so that the crushing effect is ensured, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of crushing equipment, in particular to multi-stage crushing equipment for recycling polypropylene. Background Art

[0002] Polypropylene is a thermoplastic synthetic resin with excellent performance, which has the characteristics of chemical resistance, heat resistance, electrical insulation, high strength mechanical properties and high wear resistance. It is widely used in the production of clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, pipelines, chemical containers, etc. It is also commonly used in the packaging of food and medicines, and can also be recycled.

[0003] The utility model patent with publication number CN220638588U discloses a waste plastic recycling and crushing device, including a crusher and a cleaning component. The cleaning component includes a cleaning box installed on one side of the crusher, and a filter plate movably installed at the lower end of the cleaning box. Cleaning rollers are also movably installed on both sides of the cleaning box on the upper part of the filter plate.

[0004] Although the utility model can clean up a large amount of dirt and impurities adhering to the upper end of the waste plastics and improve the purity of the waste plastics after crushing, it lacks a multiple crushing structure, resulting in insufficient crushing and poor crushing effect. Utility Model Content

[0005] The utility model aims to provide a multi-stage crushing device for polypropylene recovery, so as to solve the problem of lack of multiple crushing structure proposed in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The multi-stage crushing equipment for polypropylene recycling comprises a shell, wherein a feed hopper is installed at the center of the top surface of the shell, and further comprises: a plurality of crushing mechanisms for graded crushing, wherein the crushing mechanism comprises two crushing rollers rotatably connected in parallel in the shell; a plurality of screening mechanisms for graded screening, wherein a plurality of the screening mechanisms are installed below each of the crushing mechanisms, wherein the screening mechanism comprises a filter plate installed in the shell through a transverse plate and a spring, wherein the filter plate is arranged obliquely, and the filter hole sizes of the plurality of filter plates decrease sequentially from top to bottom; a conveying mechanism for conveying materials, wherein the conveying mechanism comprises a box body fixed to the side surface of the shell near the lower end of the filter plate, wherein rollers are rotatably connected near the top and the bottom of the box body, wherein the two rollers are connected through a conveyor belt transmission, and a plurality of partitions are equidistantly fixed on the conveyor belt.

[0008] Preferably, two guide bars are fixed opposite to each other above the crushing roller in the shell, and the longitudinal section of the guide bar is triangular.

[0009] Preferably, the crushing teeth on the two crushing rollers are arranged alternately in sequence, one end of the crushing roller extends out of the shell and a gear is coaxially fixed thereto, and the two gears are meshed with each other.

[0010] Preferably, the crushing mechanism further comprises a driving motor fixed to an outer side wall of the shell, and the driving motor is coaxially connected to one of the crushing rollers.

[0011] Preferably, a rotating shaft is rotatably connected to the housing below the filter plate, and a cam is coaxially connected to the rotating shaft. The cam is used to control the up and down vibration of the filter plate.

[0012] Preferably, the screening mechanism further comprises a control motor fixed to the outer side wall of the shell, and the output shaft of the control motor is coaxially connected to the rotating shaft.

[0013] Preferably, the box body is provided with a feed inlet near the lower ends of the plurality of filter plates, and the box body is provided with a discharge outlet near the feed hopper.

[0014] Preferably, a lifting motor is fixed to the outer side wall of the box body, and the output shaft of the lifting motor is coaxially connected to one of the rollers.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides multiple crushing mechanisms and multiple screening mechanisms to crush polypropylene multiple times, and then transports the incompletely crushed polypropylene back into the shell through the conveying mechanism for further crushing, thereby ensuring the crushing effect and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the housing in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the crushing mechanism in the utility model;

[0020] Figure 4 It is a longitudinal section view of the housing in the utility model;

[0021] Figure 5 It is a longitudinal section view of the box body in the utility model.

[0022] In the figure:

[0023] 1. Shell; 10. Feed hopper; 11. Guide strip;

[0024] 2. Crushing mechanism; 20. Crushing roller; 21. Gear; 22. Driving motor;

[0025] 3. Screening mechanism; 30. Filter plate; 31. Horizontal plate; 32. Spring; 33. Control motor; 34. Rotating shaft; 35. Cam;

[0026] 4. Conveying mechanism; 40. Box body; 41. Roller; 42. Conveyor belt; 43. Partition; 44. Lifting motor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in 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.

[0028] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0029] The multi-stage crushing equipment for polypropylene recycling comprises a shell 1, a feed hopper 10 is installed at the center of the top surface of the shell 1, and also comprises: a plurality of crushing mechanisms 2 for graded crushing, the crushing mechanism 2 comprises two crushing rollers 20 rotatably connected to the shell 1 side by side, and the two crushing rollers 20 rotate in opposite directions; a plurality of screening mechanisms 3 for graded screening, the plurality of screening mechanisms 3 are installed below each crushing mechanism 2, the screening mechanism 3 comprises a filter plate 30 installed in the shell 1 through a cross plate 31 and a spring 32, the filter plate 30 is inclined, the filter hole sizes of the plurality of filter plates 30 decrease from top to bottom, and polypropylene of different sizes is filtered out in turn; a conveying mechanism 4 for conveying materials, the conveying mechanism 4 comprises a box body 40 fixed to the side of the lower end of the shell 1 near the filter plate 30, and rollers 41 are rotatably connected near the top and the bottom of the box body 40, the two rollers 41 are connected by a conveyor belt 42, and a plurality of partitions 43 are fixed on the conveyor belt 42 at equal intervals, so that polypropylene that does not meet the size requirements is transported to the feed hopper 10, which saves manpower and is more practical.

[0030] In this embodiment, two guide bars 11 are fixed opposite to each other above the crushing roller 20 in the shell 1. The longitudinal section of the guide bar 11 is triangular. The direction of the guide bar 11 is the same as that of the crushing roller 20, and the polypropylene is guided between the two crushing rollers 20.

[0031] Specifically, the crushing teeth on the two crushing rollers 20 are arranged alternately in sequence, one end of the crushing roller 20 extends out of the shell 1 and a gear 21 is coaxially fixed thereto, and the two gears 21 mesh with each other, so that the two crushing rollers 20 rotate simultaneously and in opposite directions.

[0032] Specifically, the crushing mechanism 2 further includes a driving motor 22 fixed to the outer side wall of the shell 1 . The driving motor 22 is coaxially connected to one of the crushing rollers 20 . The driving motor 22 serves as a power source to drive the two crushing rollers 20 to rotate.

[0033] Furthermore, a rotating shaft 34 is rotatably connected to the housing 1 below the filter plate 30, and a cam 35 is coaxially connected to the rotating shaft 34. The cam 35 is used to control the up and down vibration of the filter plate 30. The cam 35 intermittently contacts the filter plate 30, and under the action of the spring 32, the filter plate 30 vibrates up and down.

[0034] In addition, the screening mechanism 3 further comprises a control motor 33 fixed to the outer wall of the shell 1 , the output shaft of the control motor 33 is coaxially connected with the rotating shaft 34 , and the control motor 33 serves as a power source to drive the rotating shaft 34 to rotate.

[0035] It is worth noting that the box body 40 is provided with a feed inlet near the lower end of the filter plates 30 , and the box body 40 is provided with a discharge port near the feed hopper 10 , so that the polypropylene on the filter plates 30 can fall into the box body 40 .

[0036] It is worth noting that a lifting motor 44 is fixed to the outer wall of the box 40, and the output shaft of the lifting motor 44 is coaxially connected to one of the rollers 41. The lifting motor 44 serves as a power source to drive the conveyor belt 42 to work, and can also open the box 40 to take out the polypropylene in the box 40.

[0037] Finally, it should be noted that the components involved in the utility model, such as the drive motor 22, the control motor 33 and the lifting motor 44, are all universal standard parts or components known to technical personnel in this field. Their structures and principles are all known to technical personnel through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and compatible controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the utility model. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0038] When the multi-stage crushing equipment for recycling polypropylene of the utility model is in use, polypropylene is added into the shell body 1 from the feed hopper 10, and the polypropylene is guided to between the two crushing rollers 20 by the guide bar 11. The output shaft of the driving motor 22 drives the crushing roller 20 coaxially connected thereto to rotate, and then the two crushing rollers 20 are rotated simultaneously through the gear 21, and the two crushing rollers 20 perform a crushing operation, and the crushed polypropylene continues to fall, and the output shaft of the control motor 33 drives the rotating shaft 34 to rotate, and the cam 35 rotates accordingly. The cam 35 drives the filter plate 30 to vibrate up and down during the rotation process. Polypropylene with too large size cannot pass through the filter holes on the filter plate 30 and will fall into the box body 40. After multiple crushing and screening, the crushing effect is better. For the polypropylene falling into the box body 40, the output shaft of the lifting motor 44 drives the rotating roller 41 coaxially connected thereto to rotate, and the conveyor belt 42 moves, and the polypropylene falls between the two adjacent partitions 43. The conveyor belt 42 brings the polypropylene to the feed hopper 10 and falls, which saves manpower and is more practical.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-stage crushing device for polypropylene recovery, comprising a housing (1), wherein a feed hopper (10) is installed at the center of the top surface of the housing (1), characterized in that: Also includes: A plurality of crushing mechanisms (2) for graded crushing, wherein the crushing mechanisms (2) include two crushing rollers (20) rotatably connected side by side in the housing (1); A plurality of screening mechanisms (3) for graded screening, wherein the plurality of screening mechanisms (3) are installed below each of the crushing mechanisms (2), the screening mechanisms (3) comprising a filter plate (30) installed in the housing (1) via a transverse plate (31) and a spring (32), the filter plate (30) being arranged at an angle, and the filter hole sizes of the plurality of filter plates (30) decreasing in sequence from top to bottom; A conveying mechanism (4) for conveying materials, the conveying mechanism (4) comprising a box body (40) fixed to the side surface of the housing (1) near the lower end of the filter plate (30), rollers (41) are rotatably connected near the top and bottom ends of the box body (40), two rollers (41) are connected by a conveyor belt (42), and a plurality of partitions (43) are equidistantly fixed on the conveyor belt (42).

2. The multi-stage crushing equipment for polypropylene recovery according to claim 1, characterized in that: Two guide bars (11) are fixed opposite to each other above the crushing roller (20) in the shell (1), and the longitudinal section of the guide bar (11) is triangular.

3. The multi-stage crushing equipment for polypropylene recovery according to claim 1 is characterized in that: The crushing teeth on the two crushing rollers (20) are arranged alternately in sequence, and a gear (21) is coaxially fixed to one end of the crushing roller (20) after extending outside the shell (1), and the two gears (21) are meshed with each other.

4. The multi-stage crushing equipment for polypropylene recovery according to claim 1 is characterized in that: The crushing mechanism (2) further comprises a driving motor (22) fixed to the outer side wall of the shell (1), and the driving motor (22) is coaxially connected to one of the crushing rollers (20).

5. The multi-stage crushing equipment for polypropylene recovery according to claim 1 is characterized in that: A rotating shaft (34) is rotatably connected to the housing (1) below the filter plate (30), and a cam (35) is coaxially connected to the rotating shaft (34). The cam (35) is used to control the up and down vibration of the filter plate (30).

6. The multi-stage crushing equipment for polypropylene recovery according to claim 5, characterized in that: The screening mechanism (3) further comprises a control motor (33) fixed to the outer wall of the housing (1), and an output shaft of the control motor (33) is coaxially connected to the rotating shaft (34).

7. The multi-stage crushing equipment for polypropylene recovery according to claim 1, characterized in that: The box body (40) is provided with a feed inlet at a position close to the lower ends of the plurality of filter plates (30), and the box body (40) is provided with a discharge port at a position close to the feed hopper (10).

8. The multi-stage crushing equipment for polypropylene recovery according to claim 1, characterized in that: A lifting motor (44) is fixed to the outer side wall of the box body (40), and an output shaft of the lifting motor (44) is coaxially connected to one of the rotating rollers (41).

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