A detection device for a double screw extrusion granulator

Abstract

The utility model discloses a kind of detection devices for double-screw extruding granulator, belong to the technical field of plastics processing.This kind of detection device for double-screw extruding granulator, including connecting assembly, detection component and separation component, detection component is set to the outside one end of connecting assembly, separation component is set to the outside other end of connecting assembly, detection component includes detection tube, detection tube is transparent acrylic material, the outside of detection tube is equipped with annular seat, the inner wall of annular seat is fixedly connected with the outer wall of detection tube, the outer wall of annular seat is equipped with several mounting seats, several mounting seats are equidistant annular distribution, and several mounting seats are all equipped with industrial camera, the utility model can effectively detect the impurity particles contained in plastic particles, simultaneously realize the separation of plastic particles and non-metallic impurity particles, improve production efficiency, with higher practical value.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing technology, specifically to a testing device for a twin-screw extrusion granulator. Background Technology

[0002] A twin-screw extruder is a piece of equipment used for the production and processing of plastic granules. Its core function is to process plastic granule raw materials, such as conveying, mixing, melting, and extruding, to ultimately produce granular finished products that meet the requirements. Through the shearing and extruding forces generated by the co-rotation or counter-rotation of the twin screws, the raw materials are deeply homogenized and plasticized, ensuring the consistency of the finished granules in terms of composition, density, and melting properties. Simultaneously, its pelletizing mechanism after extrusion can process the molten material into granules of specific size and shape, and it is adaptable to different types of plastic raw materials (such as PE, PP, PVC, etc.).

[0003] Based on the above, the inventors have discovered the following problems: In the twin-screw extrusion granulation production process, the purity of the plastic granules directly determines the quality of the final product. However, in the current production process, plastic granule raw materials are mostly directly fed into the feed hopper of the twin-screw extruder, and non-metallic impurity particles may be mixed in with the raw materials. The detection of such impurities often relies mainly on manual visual screening. This method is not only prone to high false negative rates due to factors such as visual fatigue and lack of concentration, but also significantly reduces production efficiency due to the limitations of manual operation.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a detection device for a twin-screw extrusion granulator, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide a detection device for a twin-screw extruder granulator to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A detection device for a twin-screw extruder granulator includes a connecting assembly, a detection assembly, and a separating assembly. The detection assembly is located at one external end of the connecting assembly, and the separating assembly is located at the other external end of the connecting assembly. The detection assembly includes a detection tube made of transparent acrylic material. An annular seat is fitted around the outside of the detection tube. The inner wall of the annular seat is fixedly connected to the outer wall of the detection tube. A plurality of mounting seats are installed on the outer wall of the annular seat. The mounting seats are arranged in a ring at equal intervals, and an industrial camera is mounted on each of the mounting seats.

[0008] Furthermore, the separation assembly includes a vertical cylinder, with a feed inlet on one side of the outer wall of the vertical cylinder, and an impurity discharge pipe connected to one side of the bottom of the vertical cylinder. A pneumatic slide valve is installed at the end of the impurity discharge pipe away from the vertical cylinder.

[0009] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up a vertical cylinder, the vertical cylinder provides a closed vertical space for air separation, which meets the dynamic requirements of vertical airflow. It can utilize the synergistic effect of gravity and airflow to achieve the stratified separation of impurities and plastic particles; by opening the feed port on the side of the vertical cylinder and then precisely docking it with the connecting components, the detected material can smoothly enter the middle of the cylinder in the horizontal direction, avoiding the material directly impacting the bottom airflow field and causing turbulence; through the combined use of the impurity discharge pipe and the pneumatic slide valve, when the pneumatic slide valve is working, the non-metallic impurities accumulated at the bottom of the vertical cylinder will be discharged through the impurity discharge pipe.

[0010] Furthermore, an air inlet pipe is welded to the bottom of the vertical cylinder, and an air outlet pipe is welded to the top of the vertical cylinder. A centrifugal fan is installed inside the air inlet pipe.

[0011] The beneficial effects of adopting the above-mentioned further solution are that by setting an air inlet pipe at the bottom and an air outlet pipe at the top, a bottom-in, top-out airflow circulation path is formed. Combined with the stable air pressure provided by the centrifugal fan, a uniform vertical upward airflow field can be formed in the vertical cylinder to meet the requirements of the suspension velocity difference between plastic particles and non-metallic impurities. The centrifugal fan can flexibly adjust the wind speed through frequency conversion control to adapt to the separation of plastic particles with different densities and particle sizes, such as PE particles requiring 10-12 meters per second and PP particles requiring 8-10 meters per second. When the density difference between plastic and impurities is large, such as separating non-metallic impurities such as stones from PE or PP plastic particles, and the particle size of non-metallic impurities is within the range of 5-50mm, the material falls from the inlet and encounters the upward airflow. Plastic particles with low suspension velocity are carried upward by the airflow to the top air outlet pipe. Impurities with high suspension velocity, such as stones and glass, cannot be carried by the airflow and sink to the bottom.

[0012] Furthermore, microporous filter membranes are installed inside the air inlet pipe both above and below the centrifugal fan.

[0013] The beneficial effect of adopting the above-mentioned further solution is that by setting microporous filter membranes above and below the centrifugal fan, both the upper and lower microporous filter membranes are intended to prevent impurities and other particulate matter from contacting the internal parts of the centrifugal fan and causing damage to the centrifugal fan, thereby improving the service life of the centrifugal fan.

[0014] Furthermore, a converging hood is installed at the bottom of the interior of the vertical cylinder. The converging hood is conical, and an airflow channel is provided inside the converging hood.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that, since the wind-gathering hood is conical, it can gather the dispersed airflow introduced by the air inlet pipe, guide the airflow vertically upward through the internal wind-gathering channel, enhance the concentration and impact of the airflow at the bottom, and avoid the wind speed attenuation caused by the airflow spreading at the bottom of the cylinder; the wind-gathering channel is usually radial or spiral.

[0016] Furthermore, the air outlet pipe has a corrugated pipe at the end away from the vertical cylinder, and the corrugated pipe is connected to the air outlet pipe by a flange.

[0017] The beneficial effect of adopting the above-mentioned further solution is that, through the setting of the corrugated pipe, the corrugated pipe can be connected to the feed port of the cyclone separator; the material falls from the feed port and encounters the upward airflow; the plastic particles with low suspension velocity are carried upward by the airflow to the top air outlet pipe, and then sent into the cyclone separator by the corrugated pipe. After the non-metallic impurities are separated, the plastic particles enter the cyclone separator for separation of plastic particles and airflow.

[0018] Furthermore, the connecting assembly includes a first connecting pipe, a second connecting pipe is fixedly installed on the outer wall of the first connecting pipe, the second connecting pipe is connected to the first connecting pipe, one end of the first connecting pipe is open, the other end of the first connecting pipe is closed, the open end of the first connecting pipe is fixedly connected to the feed port of the vertical cylinder, and the end of the second connecting pipe away from the first connecting pipe is fixedly connected to one end of the detection pipe.

[0019] The beneficial effect of adopting the above-mentioned further solution is that, since the first connecting pipe is connected to the second connecting pipe, the first connecting pipe is connected to the detection pipe, and the second connecting pipe is connected to the vertical cylinder, the detected plastic particles enter the vertical cylinder through the connecting assembly to wait for separation processing; since one end of the first connecting pipe is open and the other end is closed, the closed end design of the first connecting pipe can prevent material leakage from the non-feeding direction.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This detection device for a twin-screw extruder granulator is configured with a connecting component, a detection component, and a separation component. The connecting component connects the detection component and the separation component; the detection component detects whether non-metallic impurities are present in the plastic raw material; the separation component separates the plastic particles from the non-metallic impurities; since the detection tube is made of acrylic material, which has high light transmittance, it provides a clear observation window for the industrial camera, ensuring that the industrial camera can accurately capture the characteristics of impurities in the plastic particles inside the detection tube (impurities and plastic particles have distinguishable visual characteristics such as color, shape, and texture); the annular seat is fixedly connected to the detection tube to form an integral whole, and several mounting seats are evenly distributed in a ring, which can realize full-circumference imaging of the detection tube; through the setting of the industrial camera, the industrial camera first performs real-time imaging analysis on the material passing through the detection tube, identifies particles containing impurities, and then the separation component can separate the plastic particles and non-metallic impurity particles. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of a detection device for a twin-screw extrusion granulator provided by this utility model;

[0022] Figure 2 Exploded three-dimensional structural diagram of the detection component of a detection device for a twin-screw extruder granulator provided by this utility model. Figure 1 ;

[0023] Figure 3 Exploded three-dimensional structural diagram of the detection component of a detection device for a twin-screw extruder granulator provided by this utility model. Figure 2 ;

[0024] Figure 4 A bottom-view cross-sectional three-dimensional structural diagram of the separation component of a detection device for a twin-screw extruder provided by this utility model;

[0025] Figure 5 A front cross-sectional view of the separation component of a detection device for a twin-screw extruder provided by this utility model.

[0026] In the diagram: 1. Connecting assembly; 11. First connecting pipe; 12. Second connecting pipe; 2. Detection assembly; 21. Detection pipe; 22. Annular seat; 23. Mounting seat; 24. Industrial camera; 3. Separation assembly; 31. Vertical cylinder; 32. Feed inlet; 33. Air inlet pipe; 34. Air outlet pipe; 35. Air concentrator; 36. Centrifugal fan; 37. Microporous filter membrane; 38. Corrugated pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 This utility model provides a technical solution: a detection device for a twin-screw extruder granulator, comprising a connecting component 1, a detection component 2, and a separation component 3. The detection component 2 is disposed at one external end of the connecting component 1, and the separation component 3 is disposed at the other external end of the connecting component 1. The detection component 2 includes a detection tube 21 made of transparent acrylic material. An annular seat 22 is fitted around the outside of the detection tube 21, and the inner wall of the annular seat 22 is fixedly connected to the outer wall of the detection tube 21. A plurality of mounting seats 23 are installed on the outer wall of the annular seat 22, and the mounting seats 23 are distributed in a ring at equal intervals. An industrial camera 24 is installed on each of the mounting seats 23. By setting up the connecting component 1, the detection component 2, and the separation component 3, the connecting component 1 is used to connect the detection component 2 and the separation component 3; the detection component 2 is used to detect whether non-metallic impurities are present in the plastic raw material. The material is tested; the separation component 3 is used to separate plastic particles and non-metallic impurities; since the detection tube 21 is made of acrylic material, which has high light transmittance, it can provide a clear observation window for the industrial camera 24, ensuring that the industrial camera 24 can accurately capture the characteristics of impurities in the plastic particles inside the detection tube 21; the annular seat 22 is fixedly connected to the detection tube 21 to form an integral whole, and several mounting seats 23 are evenly distributed in a ring, which can realize full-circumference shooting of the detection tube 21; through the setting of the industrial camera 24, the industrial camera 24 first performs real-time imaging analysis on the material passing through the detection tube 21, and after identifying particles containing impurities, the plastic particles and non-metallic impurity particles can be separated by the subsequent separation component 3. The specific hardware of the industrial camera 24 includes a high-resolution camera, an adaptive light source, a lens, and algorithm feature extraction and classification model optimized for specific impurity types.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-5This utility model provides a technical solution: the separation component 3 includes a vertical cylinder 31, with an inlet 32 ​​on one side of the outer wall of the vertical cylinder 31, and an impurity discharge pipe connected to one side of the bottom of the vertical cylinder 31. A pneumatic slide valve is installed at the end of the impurity discharge pipe away from the vertical cylinder 31. An air inlet pipe 33 is welded to the bottom of the vertical cylinder 31, and an air outlet pipe 34 is welded to the top of the vertical cylinder 31. A centrifugal fan 36 is installed inside the air inlet pipe 33, and microporous filter membranes 37 are installed above and below the centrifugal fan 36 inside the air inlet pipe 33. An air concentrator 35 is installed at the bottom of the interior of the vertical cylinder 31. The air concentrator 35 is conical, and an air concentrator channel is opened inside the air concentrator 35. A corrugated pipe is provided at the end of the air outlet pipe 34 away from the vertical cylinder 31. 38. The corrugated pipe 38 is connected to the air outlet pipe 34 via a flange. The corrugated pipe 38 can be connected to the feed inlet 32 ​​of the cyclone separator. When the centrifugal fan 36 starts, it forms an upward airflow field. The material falls from the feed inlet 32 ​​and encounters the upward airflow. Plastic particles with low suspension velocity are carried upward by the airflow to the top air outlet pipe 34, and then sent into the cyclone separator by the corrugated pipe 38. The plastic particles after the non-metallic impurities are separated enter the cyclone separator for separation of plastic particles and airflow. Impurities with high suspension velocity, such as stones and glass, cannot be carried by the airflow and sink downward to the bottom. They roll down and accumulate at the bottom of the vertical cylinder 31 due to the inclination of the outer wall of the wind-gathering hood 35. The pneumatic slide valve works, and the non-metallic impurities accumulated at the bottom of the vertical cylinder 31 are discharged through the impurity discharge pipe.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-5This utility model provides a technical solution: the connecting component 1 includes a first connecting pipe 11, and a second connecting pipe 12 is fixedly installed on the outer wall of the first connecting pipe 11. The second connecting pipe 12 is connected to the first connecting pipe 11. One end of the first connecting pipe 11 is open, and the other end is closed. The open end of the first connecting pipe 11 is fixedly connected to the feed port 32 of the vertical cylinder 31. The end of the second connecting pipe 12 away from the first connecting pipe 11 is fixedly connected to one end of the detection pipe 21. Since the first connecting pipe 11 is connected to the second connecting pipe 12, the first connecting pipe 11 is connected to the detection pipe 21, and the second connecting pipe 12 is connected to the vertical cylinder 31, the detected plastic particles enter the vertical cylinder 31 through the connecting component 1 to wait for separation processing. Since one end of the first connecting pipe 11 is open and the other end is closed, the closed end design of the first connecting pipe 11 can prevent material leakage from the non-feeding direction.

[0033] Specifically, the working principle of this detection device for a twin-screw extruder is as follows: In use, first connect the end of the corrugated pipe 38 furthest from the air outlet to the flange at the inlet 32 ​​of the cyclone separator. The outlet of the cyclone separator can be fixedly connected to the feed hopper of the twin-screw extruder through an external pipe. Connect the detection tube 21 to the flange at the outlet of the vacuum feeder. When the vacuum feeder starts, plastic granules enter the detection tube 21. The acrylic material has high light transmittance, providing a clear observation window for the industrial camera 24, ensuring that the industrial camera 24 can accurately capture the characteristics of impurities within the plastic granules in the detection tube 21. The annular seat 22 is fixedly connected to the detection tube 21 to form an integral unit, and several mounting seats 23 are evenly distributed in a ring, enabling full-circumference imaging of the detection tube 21. Through the setting of the industrial camera 24, the industrial camera 24 first performs real-time imaging of the material passing through the detection tube 21. The system analyzes and identifies impurities within the plastic granules. Centrifugal fan 36 is activated, creating an upward airflow. The detected plastic granules fall through the first connecting pipe 11 and the second connecting pipe 12, and then through the feed inlet 32 ​​to the vertical cylinder 31, where they encounter the upward airflow. Plastic granules with low suspension velocity are carried upwards by the airflow to the top outlet pipe 34, and then fed into the cyclone separator through the corrugated pipe 38. The plastic granules, after being separated from non-metallic impurities, enter the cyclone separator for further separation of the plastic granules and airflow. The separated plastic granules then enter the twin-screw extruder granulator through its feed hopper. Impurities with high suspension velocity, such as stones and glass, cannot be carried by the airflow and sink to the bottom. Due to the tilting action of the outer wall of the air-collecting hood 35, they roll and accumulate at the bottom of the vertical cylinder 31. The pneumatic slide valve operates, and the non-metallic impurities accumulated at the bottom of the vertical cylinder 31 are discharged through the impurity discharge pipe.

[0034] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.

Claims

1. A detection device for a twin-screw extruder granulator, characterized in that, The device includes a connecting component (1), a detection component (2), and a separating component (3). The detection component (2) is located at one end of the connecting component (1), and the separating component (3) is located at the other end of the connecting component (1). The detection component (2) includes a detection tube (21) made of transparent acrylic material. An annular seat (22) is fitted around the outside of the detection tube (21). The inner wall of the annular seat (22) is fixedly connected to the outer wall of the detection tube (21). Several mounting seats (23) are installed on the outer wall of the annular seat (22). The mounting seats (23) are distributed in a ring at equal intervals, and an industrial camera (24) is installed on each of the mounting seats (23).

2. The detection device for a twin-screw extruder granulator according to claim 1, characterized in that, The separation component (3) includes a vertical cylinder (31), with a feed inlet (32) on one side of the outer wall of the vertical cylinder (31), and an impurity discharge pipe connected to one side of the bottom end of the vertical cylinder (31). A pneumatic slide valve is installed at the end of the impurity discharge pipe away from the vertical cylinder (31).

3. The detection device for a twin-screw extruder granulator according to claim 2, characterized in that, An air inlet pipe (33) is welded to the bottom end of the vertical cylinder (31), and an air outlet pipe (34) is welded to the top end of the vertical cylinder (31). A centrifugal fan (36) is installed inside the air inlet pipe (33).

4. The detection device for a twin-screw extruder granulator according to claim 3, characterized in that, The air inlet pipe (33) is equipped with microporous filter membranes (37) located above and below the centrifugal fan (36).

5. The detection device for a twin-screw extruder granulator according to claim 3, characterized in that, The bottom of the vertical cylinder (31) is equipped with a wind-gathering hood (35), which is conical and has a wind-gathering channel inside.

6. The detection device for a twin-screw extruder granulator according to claim 3, characterized in that, The air outlet pipe (34) has a corrugated pipe (38) at one end away from the vertical cylinder (31), and the corrugated pipe (38) is connected to the air outlet pipe (34) by a flange.

7. The detection device for a twin-screw extruder granulator according to claim 1, characterized in that, The connecting assembly (1) includes a first connecting pipe (11), and a second connecting pipe (12) is fixedly installed on the outer wall of the first connecting pipe (11). The second connecting pipe (12) is connected to the first connecting pipe (11). One end of the first connecting pipe (11) is open, and the other end of the first connecting pipe (11) is closed. The open end of the first connecting pipe (11) is fixedly connected to the feed port (32) of the vertical cylinder (31). The end of the second connecting pipe (12) away from the first connecting pipe (11) is fixedly connected to one end of the detection pipe (21).

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