Metal separator for pneumatic conveying system

Abstract

The invention discloses a metal separator for a pneumatic conveying system, and relates to the technical field of metal separation equipment, the metal separator comprises a conveying pipeline, the conveying pipeline is provided with a metal detection mechanism for detecting metal impurities in plastic, and the conveying pipeline is further provided with a separation mechanism for separating raw materials; and one side of the separation mechanism communicates with a storage box for collecting the raw materials. According to the metal separator for the pneumatic conveying system, when the supporting plate moves, the knocking plate knocks the conveying pipeline, particles attached to the inner wall of the pipeline can fall off more easily, cleaning efficiency is improved in cooperation with cleaning of the ash cleaning plate, it is guaranteed that the conveying pipeline is kept in a good conveying state all the time, and the service life of the conveying pipeline is prolonged. And the knocking plate can swing in the rotating process of the linkage disc, it is guaranteed that the butt joint plate and the adjusting plate can elastically move within a certain range through the arrangement of a spring, swing of the knocking plate is more flexible and stable, and therefore the function of knocking and cleaning the conveying pipeline is better achieved.

Description

Technical Field

[0001] This invention relates to the field of metal separation equipment technology, specifically a metal separator for a pneumatic conveying system. Background Technology

[0002] The plastics and chemical industry is a core industry of the national economy. Granular materials need to be transported to equipment such as injection molding machines, extruders, and granulators through vacuum or pressure feeding systems for processing. Metal impurities are a core hidden danger in plastics and chemical production. Therefore, configuring dedicated metal separation equipment in the plastics and chemical feeding system is the key to ensuring stable production and reducing losses.

[0003] To overcome the above-mentioned defects, existing technology 1 (Chinese patent with announcement number CN101327484B, announcement date 2011-09-07) provides a metal separator, which includes: a hopper, a metal detection channel, a metal detection circuit, a feed channel, a metal channel, and a separation actuator; the separation actuator includes: a baffle, a cylinder, a swing rod, and a solenoid valve; when the baffle is working, it can be controlled by the separation actuator to be in a first position that closes the entrance of the metal channel, or in a second position that closes the feed channel; when the metal detection circuit detects that metal is passing through the metal detection channel, the metal detection circuit supplies power to the solenoid valve, causing the output shaft of the cylinder to move and the baffle to switch from the first position to the second position; when no metal is detected, the power supply to the solenoid valve is stopped, causing the output shaft of the cylinder to move and the baffle to return from the second position to the first position. The metal separator has a long service life and low use and maintenance costs.

[0004] There is also existing technology two (Chinese patent with announcement number CN217042986U and announcement date of 2022-07-26) energy-saving metal separator, which solves the problem of material waste caused by the inability to replace the storage device after the discharge pipe is full, and also solves the problem of shutting down the equipment to replace the material after the material is full. Therefore, it improves work efficiency and practicality. It includes a metal separation device and an automatic rejection device. The automatic rejection device is installed inside the metal separation device. It also includes a discharge pipe, an upper sealing bearing, a discharge seat and a lower sealing bearing. The discharge pipe is installed in the middle of the bottom end of the metal separation device. The bottom of the discharge pipe is connected to the transfer pipe through the upper sealing bearing. The top of the discharge seat has an installation groove. The bottom of the connecting pipe is installed in the installation groove through the lower sealing bearing. The side of the discharge seat has two sets of discharge ports that are connected to the installation groove and are inclined downward. The discharge pipe is installed at an incline in both sets of discharge ports. The bottom of the transfer pipe is installed with an arc-shaped baffle that matches one set of discharge ports.

[0005] While existing technologies can shut down the equipment for material replacement when the material is full, they do not disperse plastic particles thoroughly enough in the conveying pipeline. This may result in some metal impurities being trapped within the plastic particle clumps, thus reducing the accuracy of metal detection. Furthermore, existing metal separators mostly only perform simple dust removal when cleaning the conveying pipeline, and their cleaning effect is not ideal for some stubborn particles adhering to the inner wall of the pipeline.

[0006] Therefore, we propose a metal separator for pneumatic conveying systems to address the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a metal separator for a pneumatic conveying system, in order to solve the problems mentioned in the background art, such as the insufficient dispersion of plastic particles in the conveying pipeline, which may result in some metal impurities being wrapped in the plastic particle clumps, thereby reducing the accuracy of metal detection. Furthermore, existing metal separators mostly only perform simple dust removal when cleaning the conveying pipeline, and the cleaning effect is not ideal for some stubborn particles adhering to the inner wall of the pipeline.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a metal separator for a pneumatic conveying system, comprising a conveying pipe, wherein the conveying pipe is provided with a metal detection mechanism for detecting metal impurities in plastic, and a separation mechanism for separating raw materials is also provided on the conveying pipe, and a storage box for collecting raw materials is connected to one side of the separation mechanism; a linkage disc is provided inside the conveying pipe, and a support plate is fixedly connected to the outside of the linkage disc; a cleaning mechanism is provided between the linkage disc and the inside of the conveying pipe, the cleaning mechanism cleaning the pipe wall by rotating the linkage disc, reducing the number of times the machine needs to be stopped for cleaning every week due to particle adhesion; the cleaning mechanism is also provided with a striking mechanism, the striking mechanism driving the striking plate contained therein to swing by moving the position of the support plate, striking the conveying pipe, thereby improving cleaning efficiency.

[0009] Preferably, the conveying pipe is internally rotatably connected to a connecting shaft, and a drive wheel is provided below the connecting shaft. The drive wheel drives the connecting shaft to rotate by the power of the conveying plastic granules, and the linkage disc is rotatably connected to the outside of the connecting shaft.

[0010] Preferably, the conveying pipe is internally fixedly connected to a fixed frame, and the upper surface of the fixed frame is fixedly connected to a toothed block. The linkage disc is rotatably connected to a rotating shaft, and a gear is fixedly connected to the rotating shaft. The rotating shaft is arranged horizontally.

[0011] Preferably, the gear and the tooth block mesh with each other, and the gear is located above the tooth block. An agitator is fixedly connected to the outside of the rotating shaft, and three sets of agitator shafts are arranged in a ring about the center point of the linkage disk. The rotation of the agitator shaft further disperses the conveyed plastic particles and further improves the detection efficiency of plastic particles.

[0012] Preferably, the cleaning mechanism includes a dust removal plate, which is fixedly connected to the upper surface of the support plate, and the inner side of the dust removal plate is in contact with the inner wall of the conveying pipe, and the dust removal plate can simultaneously disperse the conveyed plastic particles.

[0013] Preferably, the striking mechanism includes an adjusting plate, which is slidably connected to the outside of the conveying pipe and is arranged in a ring array about the center point of the conveying pipe, and the inner ends of the adjusting plate are both inclined.

[0014] Preferably, an abutment block is fixedly connected to the lower surface of the end side of the striking plate, and the abutment block is arranged in an arc shape when viewed from above. The abutment block and the adjusting plate are located at the same horizontal position, and the abutment block slides along the conveying pipe by the abutment action of the adjusting plate.

[0015] Preferably, the outer end of the adjusting plate is fixedly connected to a docking plate, and the inner side of the docking plate is fixedly connected to the conveying pipe, and the docking plate and the conveying pipe form an elastic structure through the spring.

[0016] Preferably, a striking plate is rotatably connected to the outer side of the conveying pipe, and the lower end of the striking plate is arranged in an outward inclined structure. A groove is opened at the lower end of the striking plate, and an abutment frame is slidably connected inside the groove. The lower end of the abutment frame is fixedly connected to the docking plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are: Equipped with a metal detection mechanism, the raw materials can be tested to accurately identify metal impurities in the plastic granules. The separation mechanism can promptly separate the raw materials containing metal impurities, preventing them from mixing with normal raw materials and ensuring the quality of subsequent processed plastic products. The storage bin provides a dedicated storage space for the separated raw materials containing metal impurities, facilitating centralized processing later.

[0018] The rotating connection between the linkage disc and the connecting shaft allows the power for conveying plastic granules to drive the linkage disc through the drive wheel. Utilizing its own power not only saves additional energy consumption but also improves the overall operating efficiency of the equipment. The support plate on the outside of the linkage disc provides support and connection for the normal operation of the cleaning and striking mechanisms. The cleaning plate contacts the inner wall of the conveying pipe. When the linkage disc rotates, it synchronously drives the support plate to rotate. At this time, the support plate prevents the cleaning plate from rotating. The cleaning plate effectively cleans the inner wall of the conveying pipe, reducing particle adhesion and greatly reducing the frequency of downtime for cleaning due to particle adhesion. This allows the equipment to operate more continuously and stably, improving production efficiency.

[0019] The dust removal plate can also simultaneously disperse the conveyed plastic granules, further optimizing the conveying state of the plastic granules and improving the accuracy of metal detection. The meshing design of gears and teeth blocks allows the rotating shaft to rotate with the rotation of the linkage disk, which in turn drives the agitator shaft to rotate. The agitator shaft is arranged in three sets in a ring shape, and its rotation further disperses the conveyed plastic granules, allowing the plastic granules to pass through the metal detection mechanism more evenly during the conveying process, thereby further improving the detection efficiency of plastic granules and ensuring that metal impurities can be detected more accurately.

[0020] When the support plate moves, it causes the striking plate to swing, which in turn strikes the conveying pipe, making it easier for particles adhering to the inner wall of the pipe to fall off. Combined with the cleaning plate, this improves cleaning efficiency and ensures that the conveying pipe always maintains a good conveying condition. The inclined structure of the adjusting plate and its cooperation with the contact block allow the striking plate to swing during the rotation of the linkage disc. The spring setting ensures that the docking plate and the adjusting plate can move elastically within a certain range, making the swing of the striking plate more flexible and stable, thereby better realizing the function of striking and cleaning the conveying pipe.

[0021] Vibration also loosens the plastic granules in the conveying pipeline, making it easier for the subsequent metal detection mechanism to more accurately detect metal impurities in the plastic granules. When the support plate continues to move and no longer contacts the adjusting plate, the elasticity of the spring will reset the docking plate, thereby driving the contact frame and the striking plate back to their initial positions, preparing for the next tapping and cleaning. During the conveying process of plastic granules, the conveying pipeline is continuously cleaned and the conveying state is optimized to ensure that the entire pneumatic conveying system with metal separator operates efficiently and stably. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional sectional view of the conveying pipeline of the present invention; Figure 3This is a three-dimensional structural diagram of the connecting shaft of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the three-dimensional structure of the dust removal plate of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the linkage disk of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the striking plate of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the three-dimensional structure of the contact frame of the present invention.

[0023] In the diagram: 1. Conveying pipe; 2. Metal detection mechanism; 3. Storage bin; 4. Drive wheel; 5. Connecting shaft; 6. Spring; 7. Striking plate; 8. Slide chute; 9. Contact frame; 10. Contact block; 11. Adjusting plate; 12. Dust removal plate; 13. Linkage disc; 14. Agitating shaft; 15. Fixing frame; 16. Tooth block; 17. Gear; 18. Rotating shaft; 19. Connecting plate; 20. Support plate; 21. Separation mechanism. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: As Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8The present invention provides the following technical solution: a metal separator for a pneumatic conveying system, wherein the conveying pipe 1 is provided with a metal detection mechanism 2 for detecting metal impurities in plastic, and the conveying pipe 1 is also provided with a separation mechanism 21 for separating raw materials, and a storage box 3 for collecting raw materials is connected to one side of the separation mechanism 21. A connecting shaft 5 is rotatably connected inside the conveying pipe 1, and a drive wheel 4 is provided below the connecting shaft 5. The drive wheel 4 drives the connecting shaft 5 to rotate by the power of conveying plastic particles. A linkage disc 13 is rotatably connected to the outside of the connecting shaft 5. A fixed frame 15 is fixedly connected inside the pipe 1, and a toothed block 16 is fixedly connected to the upper surface of the fixed frame 15. A rotating shaft 18 is rotatably connected to the linkage disk 13, and a gear 17 is fixedly connected to the rotating shaft 18. The rotating shaft 18 is arranged horizontally, and the gear 17 meshes with the toothed block 16. The gear 17 is located above the toothed block 16. An agitator 14 is fixedly connected to the outside of the rotating shaft 18, and three sets of agitator 14 are arranged in a ring about the center point of the linkage disk 13. The rotation of the agitator 14 further disperses the conveyed plastic particles, thereby further improving the detection efficiency of the plastic particles.

[0026] When the separation mechanism 21 detects that the plastic particles contain metal impurities, it can quickly and accurately separate them. Through the airflow channel and baffle device, the particles containing metal impurities can be guided to the storage bin 3 without affecting the normal conveying of plastic particles.

[0027] During the conveying of plastic granules, the drive wheel 4 and the connecting shaft 5 cooperate with each other. The drive wheel 4 can accurately transmit the power of conveying plastic granules to the connecting shaft 5, so that the linkage disk 13 can rotate stably. The stable rotation of the linkage disk 13 drives the support plate 20 to rotate accordingly. Due to the meshing of the gear 17 and the tooth block 16, the rotating shaft 18 will rotate, thereby driving the three sets of stirring shafts 14 to rotate synchronously. The rotation of the stirring shaft 14 further disperses the plastic granules, so that the plastic granules can be detected in a more uniform state when passing through the metal detection mechanism 2, which greatly improves the accuracy and efficiency of the detection.

[0028] Example 2: Figure 3 , Figures 5-7 The present invention provides the following technical solution: a metal separator for a pneumatic conveying system, wherein a linkage disc 13 is provided inside the conveying pipe 1, and a support plate 20 is fixedly connected to the outside of the linkage disc 13. A cleaning mechanism is provided between the linkage disc 13 and the inside of the conveying pipe 1. The cleaning mechanism includes a dust removal plate 12, which is fixedly connected to the upper surface of the support plate 20. The inner side of the dust removal plate 12 is in contact with the inner wall of the conveying pipe 1, and the dust removal plate 12 can simultaneously disperse the conveyed plastic particles.

[0029] When the linkage plate 13 rotates, the cleaning plate 12 continuously cleans the inner wall of the conveying pipe 1. During the cleaning process, the cleaning plate 12 can not only scrape off the adhering particles, but also create a certain airflow disturbance in the pipe. The airflow disturbance helps to disperse the plastic particles in the pipe more effectively, further optimizing the conveying state of the plastic particles and creating favorable conditions for the metal detection mechanism 2 to detect metal impurities more accurately.

[0030] Example 3: Figure 4 , Figure 5 , Figure 7 Figure 9 The present invention provides the following technical solution: a metal separator for a pneumatic conveying system, wherein a cleaning mechanism cleans the wall of the conveying pipe 1 by rotating the linkage disc 13, reducing the number of times the machine needs to be stopped for cleaning weekly due to particle adhesion. The cleaning mechanism is also provided with a striking mechanism, which drives the striking plate 7 included therein to swing by moving the position of the support plate 20, thereby striking the conveying pipe 1 and improving cleaning efficiency. The striking mechanism includes an adjusting plate 11, which is slidably connected to the outside of the conveying pipe 1, and the adjusting plates 11 are arranged in a ring array about the center point of the conveying pipe 1. The inner ends of the adjusting plates 11 are inclined on both sides. The end sides of the striking plate 7 are lower. A contact block 10 is fixedly connected to the surface, and the contact block 10 is arranged in an arc shape when viewed from above. The contact block 10 and the adjusting plate 11 are located at the same horizontal position. The contact block 10 slides along the conveying pipe 1 through the contact action of the adjusting plate 11. A docking plate 19 is fixedly connected to the outer end of the adjusting plate 11, and a spring 6 is fixedly connected between the inner side of the docking plate 19 and the conveying pipe 1. The docking plate 19 and the conveying pipe 1 form an elastic structure through the spring 6. A striking plate 7 is rotatably connected to the outer side of the conveying pipe 1, and the lower end of the striking plate 7 is arranged in an outward inclined structure. A groove 8 is opened at the lower end of the striking plate 7. A contact frame 9 is slidably connected inside the groove 8, and the lower end of the contact frame 9 is fixedly connected to the docking plate 19.

[0031] When the support plate 20 moves, it will abut against the adjusting plate 11. Because the inner ends of the adjusting plate 11 are inclined, the abutment from the support plate 20 will cause the adjusting plate 11 to slide along the outside of the conveying pipe 1. The spring 6 between the connecting plate 19 at the outer end of the adjusting plate 11 and the conveying pipe 1 will be compressed, causing the connecting plate 19 to shift. This shift will cause the contact frame 9, which is fixedly connected to it, to slide within the groove 8 at the lower end of the striking plate 7. The striking plate 7 is rotatably connected to the outside of the conveying pipe 1. The sliding of the contact frame 9 will cause the striking plate 7 to swing around the pivot point. The lower end of the striking plate 7 has an outward inclined structure; during swinging, its lower end will impact the conveying pipe 1. The tapping action causes vibration in the conveying pipe 1, further promoting the removal of particles adhering to the inner wall of the conveying pipe 1. Combined with the cleaning work of the dust removal plate 12, this greatly improves the cleaning efficiency. At the same time, this vibration also makes the plastic particles in the conveying pipe 1 more loose, preventing the particles from agglomerating and affecting the accuracy of metal detection. When the support plate 20 continues to move and no longer resists the adjusting plate 11, the compressed spring 6 will push the docking plate 19 to reset by its own elastic restoring force. The reset of the docking plate 19 will then drive the contact frame 9 to slide in the opposite direction in the slide groove 8, thereby returning the tapping plate 7 to its initial position, preparing for the next tapping cleaning.

[0032] The metal detection mechanism 2 accurately detects metal impurities in the plastic granules, the separation mechanism 21 promptly separates the granules containing metal impurities, and the cleaning mechanism and the knocking mechanism ensure the cleanliness of the conveying pipe 1 and the good conveying condition of the plastic granules, reducing the number of downtime cleaning caused by particle adhesion and improving production efficiency.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal separator for a pneumatic conveying system, comprising a conveying pipe (1), the conveying pipe (1) is provided with a metal detection mechanism (2) for detecting metal impurities in plastic, and the conveying pipe (1) is further provided with a separation mechanism (21) for separating raw materials, and one side of the separation mechanism (21) is connected and communicated with a storage tank (3) for collecting raw materials, characterized in that, The inside of the conveying pipeline (1) is provided with a linkage disc (13), and the outer side of the linkage disc (13) is fixedly connected with a supporting plate (20), a cleaning mechanism is arranged between the linkage disc (13) and the inside of the conveying pipeline (1), the cleaning mechanism cleans the wall of the conveying pipeline (1) through the rotation of the linkage disc (13), reduces the number of times of cleaning per week due to the adhesion of particles, and the knocking mechanism is further arranged on the cleaning mechanism, the knocking mechanism drives the contained knocking plate (7) to swing through the position movement of the supporting plate (20), knocks the conveying pipeline (1), and improves the cleaning efficiency.

2. A metal separator for use in a pneumatic conveying system according to claim 1, characterized in that: The inside of the conveying pipeline (1) is rotatably connected with a connecting shaft (5), and the lower side of the connecting shaft (5) is provided with a driving wheel (4), the driving wheel (4) drives the connecting shaft (5) to rotate through the power of the plastic particle conveying, and the linkage disc (13) is rotatably connected on the outer side of the connecting shaft (5).

3. A metal separator for use in a pneumatic conveying system according to claim 2, characterized in that: The inside of the conveying pipeline (1) is fixedly connected with a fixed frame (15), and the upper surface of the fixed frame (15) is fixedly connected with a tooth block (16), the linkage disc (13) is rotatably connected with a rotating shaft (18), the rotating shaft (18) is fixedly connected with a gear (17), and the rotating shaft (18) is horizontally arranged.

4. A metal separator for use in a pneumatic conveying system according to claim 3, characterized in that: The gear (17) and the tooth block (16) are in meshing relationship, the gear (17) is located above the tooth block (16), the outer side of the rotating shaft (18) is fixedly connected with an agitating shaft (14), and the agitating shaft (14) is arranged in three groups in annular array around the center point of the linkage disc (13), the rotation of the agitating shaft (14) further disperses the conveyed plastic particles, and the detection efficiency of the plastic particles is further improved.

5. A metal separator for use in a pneumatic conveying system according to claim 4, characterized in that: The cleaning mechanism comprises a dust cleaning plate (12), the dust cleaning plate (12) is fixedly connected to the upper surface of the supporting plate (20), the inner side of the dust cleaning plate (12) is in contact with the inner wall of the conveying pipeline (1), and the dust cleaning plate (12) can synchronously disperse the conveyed plastic particles.

6. A metal separator for use in a pneumatic conveying system according to claim 5, characterized in that: The knocking mechanism comprises an adjusting plate (11), the adjusting plate (11) is slidably connected to the outer side of the conveying pipeline (1), the adjusting plate (11) is arranged in annular array around the center point of the conveying pipeline (1), and the inner ends of the adjusting plates (11) are arranged in inclined structure.

7. A metal separator for use in a pneumatic conveying system according to claim 6, characterized in that: The end side lower surface of the knocking plate (7) is fixedly connected with a resisting block (10), the resisting block (10) is arranged in arc structure in top view, the resisting block (10) is located at the same horizontal position as the adjusting plate (11), and the resisting block (10) slides along the conveying pipeline (1) through the abutting action of the adjusting plate (11).

8. A metal separator for use in a pneumatic conveying system according to claim 7, characterized in that: The outer end of the adjusting plate (11) is fixedly connected with a butt plate (19), the inner side of the butt plate (19) and the conveying pipeline (1) are fixedly connected with a spring (6), and the butt plate (19) and the conveying pipeline (1) form an elastic structure through the spring (6).

9. A metal separator for use in a pneumatic conveying system according to claim 8, characterized in that: The outer side of the conveying pipeline (1) is rotationally connected with a knocking plate (7), the lower end of the knocking plate (7) is provided in an outwardly inclined structure, and the lower end of the knocking plate (7) is provided with a sliding groove (8), the inner side of the sliding groove (8) is slidably connected with an abutting frame (9), and the lower end of the abutting frame (9) is fixedly connected with a butt plate (19).

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