Waste plastic recycling and crushing device

Abstract

The utility model discloses a waste plastic recycling and crushing device which is characterized in that a treatment tank body comprises a crushing chamber and a recycling chamber which are communicated from top to bottom, and a rotary cutter group driven by a driving motor is arranged in the crushing chamber; a blower nozzle is formed in the lower part of the left side wall of the recovery chamber, an air outlet is formed in the upper part of the right side wall, and an arc-shaped air deflector gradually rising from the blower nozzle to the air outlet is arranged at the bottom of the recovery chamber; the blower further comprises an axial flow fan, a cylindrical filter screen and a collecting box, the axial flow fan is embedded in the blower nozzle, the cylindrical filter screen is fixed to the air outlet, and the collecting box is arranged at the bottom of the fixing support and located under the cylindrical filter screen. Through air deflector angle optimization, airflow path planning and improvement of a collecting mechanism, the unit energy consumption of equipment is reduced while the sorting precision is ensured, so that the purity of treated plastic particles is ensured, and the technical bottlenecks of incomplete sorting, high energy consumption, difficult maintenance and the like in the prior art are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic recycling equipment, and in particular to a waste plastic recycling and crushing device. Background Technology

[0002] With the continuous growth in the consumption of plastic products, the recycling and disposal of waste plastics has become a global environmental concern. Traditional waste plastic recycling processes typically employ a two-stage processing model of crushing and sorting, which suffers from problems such as large equipment footprint, high energy consumption, and low sorting efficiency. Particularly in the sorting stage, existing technologies mostly use hydrocyclone separation or vibrating screens. The former wastes water resources and poses a risk of secondary pollution, while the latter lacks sufficient sorting precision for fine plastic particles and is prone to screen clogging.

[0003] In the field of integrated crushing and sorting equipment, although existing vertical crushing and sorting machines can achieve continuous operation, their airflow sorting channels use a straight plate guide structure, resulting in uneven airflow distribution and easy retention of light impurities in the crushed material. In addition, although the use of multi-stage filter structures can improve sorting accuracy, there are drawbacks such as difficult filter replacement and high maintenance costs.

[0004] It is evident that the existing technology still faces the following technical bottlenecks: (1) the connection structure between the crushing chamber and the sorting chamber is unreasonable, and the crushed material is prone to accumulate at the joint; (2) the flow field control of the sorting airflow is inaccurate, making it difficult to balance the contradictory relationship between wind force intensity and material residence time; (3) the collection devices are mostly fixed structures, requiring machine shutdown for cleaning accumulated materials, which affects production efficiency. These problems severely restrict the processing efficiency and product quality stability of waste plastic recycling equipment. Therefore, it is urgent to develop an integrated crushing and recycling device with a compact structure, high sorting efficiency, and easy maintenance. In summary, the existing technology still needs improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a waste plastic recycling and crushing device to solve the problems of low efficiency and low integration of existing plastic crushing and recycling devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a waste plastic recycling and crushing device, comprising a fixed support and a processing tank installed on the fixed support, the processing tank comprising a crushing chamber and a recycling chamber connected from top to bottom, the crushing chamber being provided with a rotating blade assembly driven by a drive motor; the recycling chamber having an air inlet at the lower part of the left side wall and an air outlet at the upper part of the right side wall, and an arc-shaped air guide plate gradually rising from the air inlet to the air outlet at the bottom of the recycling chamber; further comprising an axial flow fan, a cylindrical filter screen and a collection box, the axial flow fan being embedded at the air inlet, the cylindrical filter screen being detachably fixed to the air outlet via a flange assembly, and the collection box being slidably disposed at the bottom of the fixed support and located directly below the cylindrical filter screen via a slide rail mechanism.

[0007] In one embodiment of the present invention, the flange assembly includes a fixed flange welded to the edge of the air outlet and an assembly flange connected by bolts, wherein the end of the cylindrical filter screen is embedded in the annular groove of the assembly flange.

[0008] The beneficial effects of the above embodiments are as follows: the modular connection structure of the fixed flange and the assembly flange enables the rapid positioning and installation of the cylindrical filter screen through the annular groove, which not only ensures sealing but also facilitates disassembly and maintenance, while avoiding air leakage problems caused by welding deformation.

[0009] In one embodiment of the present invention, the cylindrical filter screen has a staggered diamond-shaped mesh with a pore size of 0.5-1.2 mm.

[0010] The beneficial effects of the above embodiments are as follows: the diamond-shaped interlaced mesh design forms a multi-directional filtration channel, which increases the filtration area by 25% compared with the traditional circular mesh, and can accurately intercept dust and fibrous impurities, while avoiding the clogging of plastic particles.

[0011] In one embodiment of the present invention, the top of the crushing chamber is provided with an inverted conical feed hopper, the lower end of the feed hopper is connected to the crushing chamber through a discharge channel, and an adjustable baffle is provided in the discharge channel.

[0012] The beneficial effects of the above embodiments are as follows: the inverted cone-shaped feed hopper combined with the adjustable baffle forms a controllable material dropping system. By adjusting the opening of the baffle, the falling speed of the material can be controlled, so that the crushing blade assembly is always in the best load state and avoids material congestion or idling.

[0013] In one embodiment of this utility model, the radius of curvature of the arc-shaped air guide plate is 1 / 3 to 1 / 2 of the length of the recovery chamber, its lowest point is flush with the lower edge of the blower, and its highest point extends to 20-30cm below the air outlet.

[0014] The beneficial effects of the above embodiments are as follows: by limiting the ratio between the curvature radius of the air guide plate and the length of the chamber, the airflow is ensured to form a stable laminar flow state in the recovery chamber; and the design of extending the highest point of the air guide plate to 20-30cm below the air outlet makes the airflow form a vortex deceleration zone in front of the air outlet, effectively separating the micron-sized particles mixed due to inertia and improving the impurity removal rate.

[0015] In one embodiment of the present invention, the bottom of the recovery chamber is provided with an openable and closable maintenance door, the edge of the maintenance door is provided with a silicone sealing strip, and the surface of the maintenance door is provided with a transparent observation window.

[0016] In one embodiment of the present invention, the maintenance hatch is located at the bottom of the recovery chamber, the blower is located on one side of the maintenance hatch, and the arc-shaped air guide plate is located on the other side of the maintenance hatch.

[0017] The beneficial effects of the above embodiments are that, while ensuring airtightness, the bottom inspection hatch can monitor the material separation status in real time through a transparent observation window, thus preventing plastic particles from accumulating in corners.

[0018] In one embodiment of the present invention, the slide rail mechanism includes a guide groove disposed at the bottom of the fixed bracket and a roller assembly installed at the bottom of the collection box, and a limiting block is provided at the end of the guide groove.

[0019] The beneficial effects of the above embodiments are as follows: the sliding mechanism of the guide groove and the roller assembly, together with the limiting block, realizes the precise positioning of the collection box and the protection against detachment. Compared with the traditional drawer-type structure, it reduces the pushing and pulling resistance and can compress the time of a single cleaning operation.

[0020] As described above, the waste plastic recycling and crushing device of this utility model has the following beneficial effects: the vertical connection structure between the crushing chamber and the recycling chamber effectively avoids the problem of secondary accumulation during material transfer in traditional equipment; the axial flow fan embedded in the blower generates directional airflow, forming an airflow channel that gradually rises along the arc-shaped guide plate in the recycling chamber. The unique curvature design of the arc-shaped guide plate causes the airflow to spiral upward, which prolongs the suspension time of the material in the chamber while ensuring sufficient wind strength. Light impurities move continuously towards the air outlet under the influence of airflow, while the heavier plastic particles settle due to gravity. The dynamic balance mechanism effectively improves the separation efficiency of plastic particles and impurities. Combined with the sliding rail collection box located directly below, impurities can be collected and cleaned in real time during continuous operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the waste plastic recycling and crushing device provided by this utility model;

[0023] Figure 2 Another structural schematic diagram of the waste plastic recycling and crushing device provided by this utility model;

[0024] Figure 3 A partial structural schematic diagram of the waste plastic recycling and crushing device provided by this utility model.

[0025] Component designation explanation

[0026] 1. Crushing chamber; 2. Recovery chamber; 3. Arc-shaped air guide plate; 4. Axial flow fan; 5. Cylindrical filter screen; 6. Flange assembly; 61. Fixed flange; 62. Assembly flange; 7. Collection box; 8. Feed hopper. Detailed Implementation

[0027] This utility model provides a waste plastic recycling and crushing device. To make the purpose, technical solution and effect of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0028] In the description of this utility model, it should be understood that the terms "up, down, left, right" and other indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Please see Figures 1 to 3This utility model provides a waste plastic recycling and crushing device, including a fixed support and a processing tank installed on the fixed support. The processing tank includes a crushing chamber 1 and a recycling chamber 2 connected from top to bottom. The crushing chamber 1 is equipped with a rotating blade assembly driven by a drive motor. The recycling chamber 2 has an air inlet on the lower part of the left side wall and an air outlet on the upper part of the right side wall. The bottom of the recycling chamber 2 is equipped with an arc-shaped air guide plate 3 that gradually rises from the air inlet to the air outlet. It also includes an axial flow fan 4, a cylindrical filter screen 5 and a collection box 7. The axial flow fan 4 is embedded in the air inlet. The cylindrical filter screen 5 is detachably fixed to the air outlet by a flange assembly 6. The collection box 7 is slidably disposed at the bottom of the fixed support and located directly below the cylindrical filter screen 5 by a slide rail mechanism.

[0030] Optionally, the rotary blade assembly is a three-axis rotary blade assembly, with each blade axis distributed in an equilateral triangle, and staggered moving and fixed blades arranged between adjacent blade axes. The recovery chamber 2 adopts a double-layer stainless steel plate welded structure, with sound-absorbing and heat-insulating materials filling the interlayer, effectively reducing equipment operating noise and improving thermal energy utilization. The axial flow fan 4 adopts variable frequency control technology, and the wind speed can be infinitely adjusted within the range of 3-15m / s.

[0031] The inverted conical feed hopper 8 at the top of the crushing chamber 1 is made of 304 stainless steel, with a taper angle of 60°±2°. Its lower part connects to the crushing chamber 1 via a rectangular discharge channel, which is equipped with an adjustable baffle. The inverted conical feed hopper 8, together with the adjustable baffle, forms a controllable material discharge system. By adjusting the baffle opening, the material falling speed can be controlled, ensuring the crushing blade assembly is always under optimal load and preventing material blockage or idling.

[0032] The radius of curvature of the arc-shaped air guide plate 3 is 1 / 3 to 1 / 2 of the length of the recovery chamber 2. Its lowest point is flush with the lower edge of the air outlet, and its highest point extends 20-30cm below the air outlet. By limiting the ratio of the radius of curvature of the air guide plate to the length of the chamber, a stable laminar flow is ensured in the recovery chamber 2. The design of the air guide plate extending 20-30cm below the air outlet creates a vortex deceleration zone in front of the air outlet, effectively separating micron-sized particles mixed due to inertia and improving the impurity removal rate.

[0033] The bottom of the recovery chamber 2 is equipped with an openable and closable maintenance door. The maintenance door has a silicone sealing strip along its edge and a transparent observation window on its surface. Specifically, the maintenance door is located at the bottom of the recovery chamber 2, the air vent is located on one side of the maintenance door, and the arc-shaped air guide plate 3 is located on the other side. The bottom maintenance door ensures airtightness while allowing real-time monitoring of the material separation process through the transparent observation window, preventing plastic particles from accumulating in corners.

[0034] The flange assembly 6 includes a fixed flange 61 welded to the edge of the air outlet and an assembly flange 62 connected by bolts. The end of the cylindrical filter screen 5 is embedded in the annular groove of the assembly flange 62. The modular connection structure of the fixed flange 61 and the assembly flange 62 enables quick positioning and installation of the cylindrical filter screen 5 through the annular groove, ensuring both sealing and easy disassembly and maintenance, while avoiding air leakage caused by welding deformation.

[0035] The cylindrical filter screen 5 has an interlaced diamond-shaped mesh with a pore size of 0.5-1.2 mm. The interlaced diamond mesh design forms a multi-directional filtration channel, increasing the filtration area by 25% compared to traditional circular mesh. This allows for precise interception of dust and fibrous impurities while preventing plastic particles from getting stuck.

[0036] The slide rail mechanism includes a guide groove at the bottom of the fixed bracket and a roller assembly installed at the bottom of the collection box 7. A limiting block is provided at the end of the guide groove. The sliding mechanism of the guide groove and the roller assembly, together with the limiting block, enables precise positioning of the collection box 7 and provides anti-dislodgement protection. Compared with the traditional drawer-type structure, it reduces the pushing and pulling resistance and can shorten the time for a single cleaning operation.

[0037] In summary, the waste plastic recycling and crushing device of this utility model constructs a continuous processing channel from top to bottom. The vertical connection structure between the crushing chamber 1 and the recycling chamber 2 effectively avoids the problem of secondary accumulation during material transfer in traditional equipment. When the drive motor drives the rotating blade assembly to crush the input waste plastic at high speed, the crushed mixture falls naturally into the recycling chamber 2 under gravity. At this time, the axial flow fan 4 embedded in the blower generates directional airflow, forming an airflow channel that gradually rises along the arc-shaped guide plate 3 in the recycling chamber 2. The unique curvature design of the arc-shaped guide plate 3 causes the airflow to spiral upward, extending the suspension time of the material in the chamber while ensuring sufficient airflow strength. Light impurities move continuously towards the air outlet under the influence of airflow, while heavier plastic particles settle due to gravity. The dynamic balance mechanism effectively improves the separation efficiency of plastic particles and impurities. The cylindrical filter screen 5 can be quickly installed and removed through the flange assembly 6. Its circumferentially distributed filtration structure intercepts impurities while maintaining smooth airflow. Combined with the sliding rail collection box 7 located directly below, impurities can be collected and cleaned in real time during continuous operation, avoiding production loss caused by downtime maintenance. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0038] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A waste plastic recycling and crushing device, comprising a fixed support and a processing tank mounted on the fixed support, characterized in that: The processing tank includes a crushing chamber (1) and a recovery chamber (2) connected from top to bottom. The crushing chamber (1) is equipped with a rotating blade assembly driven by a drive motor. The recovery chamber (2) has an air inlet on the lower part of the left side wall and an air outlet on the upper part of the right side wall. The bottom of the recovery chamber (2) is equipped with an arc-shaped air guide plate (3) that gradually rises from the air inlet to the air outlet. It also includes an axial flow fan (4), a cylindrical filter screen (5) and a collection box (7). The axial flow fan (4) is embedded in the air inlet. The cylindrical filter screen (5) is detachably fixed to the air outlet through a flange assembly (6). The collection box (7) is slidably set at the bottom of the fixed bracket and located directly below the cylindrical filter screen (5) through a slide rail mechanism.

2. The waste plastic recycling and crushing device according to claim 1, characterized in that: The flange assembly (6) includes a fixed flange (61) welded to the edge of the air outlet and an assembly flange (62) connected by bolts, with the end of the cylindrical filter (5) embedded in the annular groove of the assembly flange (62).

3. The waste plastic recycling and crushing device according to claim 2, characterized in that: The tubular filter screen (5) has a diamond-shaped structure with staggered mesh openings and a pore size of 0.5-1.2 mm.

4. The waste plastic recycling and crushing device according to claim 1, characterized in that: The crushing chamber (1) is provided with an inverted cone-shaped feed hopper (8) at the top. The lower end of the feed hopper (8) is connected to the crushing chamber (1) through a material discharge channel. An adjustable baffle is provided in the material discharge channel.

5. The waste plastic recycling and crushing device according to claim 1, characterized in that: The radius of curvature of the arc-shaped air guide plate (3) is 1 / 3 to 1 / 2 of the length of the recovery chamber (2), and its lowest point is flush with the lower edge of the air outlet, while its highest point extends to 20-30cm below the air outlet.

6. The waste plastic recycling and crushing device according to claim 1, characterized in that: The bottom of the recovery chamber (2) is provided with an openable and closable maintenance door, the edge of which is provided with a silicone sealing strip, and the surface of the maintenance door is provided with a transparent observation window.

7. The waste plastic recycling and crushing device according to claim 6, characterized in that: The maintenance hatch is located at the bottom of the recovery chamber (2), the blower is located on one side of the maintenance hatch, and the arc-shaped air guide plate (3) is located on the other side of the maintenance hatch.

8. The waste plastic recycling and crushing device according to claim 1, characterized in that: The slide rail mechanism includes a guide groove at the bottom of the fixed bracket and a roller assembly installed at the bottom of the collection box (7), and a limiting block is provided at the end of the guide groove.

Images