Device for automatically sucking and filtering returned dust
By designing an automatic material suction and filtration dust return device, which uses multi-stage filter elements and guide rings to remove dust from crushed return materials, the problem of dust entering the vacuum conveying system is solved, and stable operation and efficient production of the equipment are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG KERUIDA PLASTIC CO LTD
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-10
AI Technical Summary
The crushed material contains a lot of dust, which can enter the vacuum conveying system, causing blockages, shortening equipment life, and reducing operating efficiency.
Design an automatic material suction and filtration dust return device, including a return cylinder, a storage box, a storage cylinder and a filter cylinder. The filter cylinder is equipped with multi-stage filter elements and guide rings. The return material is extracted by a negative pressure system and filtered in multiple stages to remove dust.
It effectively separates dust from recycled materials, protects the negative pressure system, extends equipment life, improves operating efficiency, simplifies the production process, and reduces the frequency and cost of replacing filter components.
Smart Images
Figure CN121819486A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lithium battery recycling equipment technology, and more particularly to an automatic material suction and filtration device for recycled dust. Background Technology
[0002] In the lithium battery manufacturing industry, material recycling is a crucial step in improving resource utilization and reducing production costs. Recycled materials primarily encompass materials from spent lithium-ion batteries. After professional processing, these materials can be reused as both positive and negative electrode materials. Additionally, crushed recycled materials generated during lithium battery production are also an important source, including materials produced during the commissioning phase, defective products, and sprues. These crushed recycled materials, after being crushed, can be reused in production or processing stages. In actual production, commonly used crushed recycled materials include PP, PE, ABS, PC, and modified materials. To efficiently transport these crushed recycled materials to the injection molding machine barrel, a vacuum conveying system is typically used. This system utilizes pressure differences to draw the recycled materials into the conveying pipes, ultimately leading them into the injection molding machine barrel for subsequent production.
[0003] However, due to the high dust content in the crushed return material, the powdery and flocculent particles mixed in can easily clog the filter screen and vacuum equipment during vacuum conveying. Even more seriously, dust can enter the negative pressure system, significantly shortening its lifespan and reducing its operating efficiency. Summary of the Invention
[0004] To address the problem in existing technologies where the crushed return material contains a large amount of dust, which can enter the negative pressure system and affect its lifespan and operating efficiency, the present invention aims to provide an automatic material suction and dust filtering device for return material. The specific technical solution is as follows: An automatic material suction, filtration, and dust return device includes: The return feeder is used to hold materials. A storage box, which is connected and communicates with the return cylinder, is used to disperse materials to increase material gaps; A storage cylinder, which is connected and communicates with the storage box, is used to store materials after dust removal. A filter cartridge is connected and communicates with the storage box. A negative pressure pipe is provided on the filter cartridge, and the end of the negative pressure pipe away from the filter cartridge is connected to a negative pressure system. The filter cartridge includes a main cylinder, and a filter assembly is provided inside the main cylinder. The filter assembly is used to perform multi-stage filtration on the dust-laden air entering from the storage box.
[0005] In some embodiments, the filtration assembly includes a primary filter element and a secondary filter element, the secondary filter element being disposed within the primary filter element, and both the primary and secondary filter elements being disposed at the end of the main cylinder near the negative pressure pipe, the negative pressure pipe being inserted into the secondary filter element.
[0006] In some embodiments, the end of the primary filter element away from the negative pressure pipe is a closed end, and a dust-proof sheet is provided on the closed end. The dust-proof sheet is funnel-shaped, and the diameter of the dust-proof sheet gradually increases along the direction away from the primary filter element.
[0007] In some embodiments, a baffle is provided at the end of the secondary filter element away from the negative pressure tube, and a recessed portion is provided in the central area of the baffle, which is recessed towards the secondary filter element. The recessed portion extends in a smooth, curved shape from the center of the baffle as a reference.
[0008] In some embodiments, the filter cartridge includes a connecting ring and a dust collection tube, the main cartridge and the connecting ring are connected by a first snap-fit structure, the dust collection tube and the connecting ring are connected by a second snap-fit structure, and the main cartridge and the dust collection tube are in communication.
[0009] In some embodiments, the connecting ring is provided with a guide ring, which is funnel-shaped and has a diameter that gradually decreases in the direction away from the main cylinder.
[0010] In some embodiments, the first snap-fit structure includes a first fixing block, a second fixing block, and a first locking member. The first fixing block is disposed on the main cylinder, the second fixing block is disposed on the connecting ring, the first fixing block is provided with a groove, and the first locking member includes a collar and a sleeve. The sleeve is rotatably connected to the second fixing block through a rotating member, and the two ends of the collar are rotatably connected to the two sides of the order sleeve. The collar can be fitted onto the groove.
[0011] In some embodiments, a first cap is provided on the main cylinder, and the first cap is connected to the main cylinder through a third snap-fit structure. A second cap is provided on the primary filter element, and the second cap is connected to the primary filter element through a fourth snap-fit structure. A third cap is provided on the secondary filter element, and the third cap is connected to the secondary filter element through a fifth snap-fit structure. The negative pressure tube passes through the first cap, the second cap, and the third cap in sequence and is inserted into the secondary filter element. A limit ring is provided on the negative pressure tube, and the limit ring is snapped with the third cap. By pulling the limit ring away from the secondary filter element, both the secondary filter element and the primary filter element can be installed close to the first cap.
[0012] In some embodiments, the third locking structure includes a third fixing block, a fourth fixing block, and a second locking member. The third fixing block is disposed on the first cap, and the fourth fixing block is disposed on the main cylinder. The third fixing block and the fourth fixing block are respectively provided with connecting holes. The second locking member includes a bolt and a nut. The bolt passes through both the third fixing block and the fourth fixing block. Two nuts are respectively connected to both ends of the bolt, and the two nuts are threadedly connected to the bolt.
[0013] In some embodiments, a stirring mechanism is provided inside the return cylinder. The stirring mechanism includes a rotating ring, a bottom ring, a stirring shaft, and a driving mechanism. The return cylinder has holes. The rotating ring is rotatably mounted on the inner wall of the holes. The bottom ring is disposed inside the return cylinder and connected to the rotating ring. Several bases are distributed circumferentially on the bottom ring. The stirring shaft is disposed on each base. The driving mechanism is fixedly installed inside the return cylinder and connected to the rotating ring.
[0014] Compared with existing technologies, the automatic material suction and filtration dust return device of this invention has the following advantages: A return cylinder is used for centralized storage of returned materials. A storage box allows for simple separation of the extracted materials. A filter cylinder, equipped with filter components, performs multi-stage filtration of the dust-laden air entering from the storage box, gradually removing dust particles of different sizes and properties. Compared with single-stage filtration, multi-stage filtration can more thoroughly purify the air, obtaining pure gas, effectively separating and treating dust in the returned materials. This eliminates the need for separate processing of returned materials containing significant amounts of dust, simplifying the production process, reducing the replacement frequency and cost of the overall filter components, and ensuring long-term stable operation of the device, thus extending its service life. This automatic material suction and filtration dust return device also ensures the normal operation of the negative pressure system, extends its service life, and enhances its operating efficiency. Attached Figure Description
[0015] The invention can be further understood from the following description taken in conjunction with the accompanying drawings, in which the components are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.
[0016] Figure 1 This is a schematic diagram of the structure of the automatic material suction, filtration, and dust return device according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the filter cartridge according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the filter cartridge according to one embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of the filter cartridge according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the top structure of the filter cartridge according to one embodiment of the present invention; Figure 6 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 7 for Figure 2 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the internal structure of the return cylinder according to one embodiment of the present invention.
[0017] Explanation of reference numerals in the attached figures: 1. Filter cartridge; 11. Main cartridge; 12. Connecting ring; 121. Guide ring; 13. Dust collection cartridge; 141. First snap-fit structure; 1411. First fixing block; 14111. Groove; 1412. Second fixing block; 1413. First locking element; 1414. Collar; 1415. Sleeve; 1416. Rotating element; 142. Second snap-fit structure; 143. Third snap-fit structure; 1431. Third fixing block; 1432. Fourth fixing block; 1433. Second locking element; 1434. Bolt; 1435. Nut; 144. Fourth snap-fit structure; 145. Fifth snap-fit structure; 15. Filter assembly; 51. Primary filter element; 152. Secondary filter element; 153. Dust separator; 154. Baffle; 1541. Recess; 16. First cap; 17. Second cap; 18. Third cap; 19. Limiting ring; 2. Storage cylinder; 3. Return cylinder; 31. Cylinder body; 32. Cover plate; 321. Hole; 4. Negative pressure pipe; 5. Storage box; 51. Box body; 52. Sealing cover; 6. First pipe; 7. Second pipe; 8. Stirring mechanism; 81. Rotating ring; 82. Bottom ring; 821. Base; 83. Stirring shaft; 84. Connecting shaft; 85. Drive mechanism; 851. Motor; 852. Linkage gear; 853. Drive gear. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0019] It should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0022] like Figure 1As shown, this embodiment provides an automatic material suction, filtration, and dust return device, including a filter cylinder 1, a storage cylinder 2, and a return cylinder 3. Material is placed inside the return cylinder 3. A negative pressure pipe 4 is provided on the filter cylinder 1, with one end of the negative pressure pipe 4 away from the filter cylinder 1 connected to a negative pressure system, which can be a vacuum pump or a Roots blower. A sealing layer (not shown) for sealing the gas is provided on the outer surface of the negative pressure pipe 4. A storage box 5 is provided above the storage cylinder 2. The return cylinder 3 is connected to and communicates with the storage box 5 through a first pipe 6. The storage box 5 is connected to and communicates with the filter cylinder 1 through a second pipe 7. The storage cylinder 2 is connected to and communicates with the storage box 5. The return cylinder 3 includes a cylinder body 31 and a cover plate 32, which are detachably connected to the cylinder body 31. The storage box 5 includes a box body 51 and a sealing cover 52, which are detachably connected to the box body 51. One end of the first pipe 6 passes through the cover plate 32 and is connected to the cylinder body 31, and the other end of the first pipe 6 is connected to the box body 51. One end of the second pipe 7 passes through the sealing cover 52 and is connected to the box body 51, and the other end of the second pipe 7 is connected to and communicates with the filter cylinder 1. As the negative pressure system operates, the first pipe 6 is evacuated, thereby drawing the material in the return cylinder 3 into the storage box 5. The storage box 5 is equipped with a grid plate (not shown), which disperses the material and increases the gaps between the materials. This allows the dust to be effectively extracted and guided under the action of airflow. The storage box 5 creates a holding space to help the dust be extracted from the material. The material passing through the grid plate will fall into the storage cylinder 2 under the action of gravity for storage. At the same time, the dust in the material will be moved by the airflow, thereby cleaning the dust in the material. The extracted air will enter the filter cylinder 1 through the second pipe 7 for filtration.
[0023] like Figures 2-5As shown, the filter cartridge 1 includes a main cylinder 11, a connecting ring 12, and a dust collection cylinder 13. The main cylinder 11 and the dust collection cylinder 13 are connected by the connecting ring 12. The end of the main cylinder 11 near the connecting ring 12 is connected to the second pipe 7, and the negative pressure pipe 4 is disposed on the upper end of the main cylinder 11 (i.e., the end away from the dust collection cylinder 13). In this embodiment, the main cylinder 11 is snapped onto the upper part of the connecting ring 12 by a first snap-fit structure 141, and the dust collection cylinder 13 is snapped onto the lower part of the connecting ring 12 by a second snap-fit structure 142. A filter assembly 15 is installed inside the main cylinder 11. The filter assembly 15 includes a primary filter element 151 and a secondary filter element 152. Both the primary filter element 151 and the secondary filter element 152 are sleeve-shaped. The secondary filter element 152 is installed inside the primary filter element 151. A first cap 16 is installed at the upper end of the main cylinder 11 (i.e., the end away from the dust collection cylinder 13). The first cap 16 is connected to the main cylinder 11 through a third snap-fit structure 143. A second cap 17 is installed at the upper end of the primary filter element 151 (i.e., the end away from the dust collection cylinder 13). The second cap 17 is connected to the primary filter element 151 through a fourth snap-fit structure 144. A third cap 18 is installed at the upper end of the secondary filter element 152 (i.e., the end away from the dust collection cylinder 13). The third cap 18 is connected to the secondary filter element 152 through a fifth snap-fit structure 145. The negative pressure pipe 4 passes through the first cap 16, the second cap 17, and the third cap 18 in sequence and is inserted into the secondary filter element 152. Specifically, the first cap 16, the third cap 18, and the third cap 18 are all provided with insertion holes, through which the negative pressure pipe 4 enters the secondary filter element 152. A limiting ring 19 is provided at one end of the negative pressure pipe 4 that enters the secondary filter element 152. The limiting ring 19 is connected to the third cap 18. By pulling the limiting ring 19 away from the secondary filter element 152 until the secondary filter element 152 and the primary filter element 151 are close to the first cap 16, and then fixing the position of the limiting ring 19 for installation, the first cap 16, the second cap 17, and the third cap 18 abut against each other in sequence. Since gas rises, under the action of the negative pressure system, the dust-laden air will flow from bottom to top after entering the filter cartridge 1. First, dusty air enters the primary filter element 151. The primary filter element 151 has a large filtration area and a certain filtration precision, enabling it to initially intercept and filter larger dust particles in the air, causing some dust to adhere to the outer surface of the primary filter element 151, while the relatively clean air continues to flow upwards. Next, the air that has passed through the primary filter element 151 enters the secondary filter element 152. The secondary filter element 152 is located inside the primary filter element 151 and has a higher filtration precision, further filtering out the remaining fine dust particles in the air, achieving multi-stage fine filtration of the dusty air.In this embodiment, the primary filter element 151 can filter large particles of 50μm, so that the air after the large particles fall into the dust collection cylinder 13 will enter the primary filter element 151 and be filtered again by the secondary filter element 152. The secondary filter element 152 can filter small particles of 20μm. Finally, the air entering the secondary filter element 152 is a relatively pure gas, which effectively avoids damage to the negative pressure system connected to the negative pressure pipe 4.
[0024] like Figures 3-4 As shown, a guide ring 121 is provided inside the connecting ring 12. The guide ring 121 is funnel-shaped, and its diameter gradually decreases along the direction away from the main cylinder 11 (i.e., the end closer to the main cylinder 11 is larger, and the end farther away from the main cylinder 11 is smaller). The filtered dust will slide down the inner wall of the guide ring 121 into the dust collection cylinder 13, while preventing the dust in the dust collection cylinder 13 from being stirred up again and entering the main cylinder 11. The lower end of the primary filter element 151 (i.e., the end away from the negative pressure pipe 4) is a closed end, and a dust-proof sheet 153 is provided on the closed end. The dust-proof sheet 153 acts as a barrier to prevent dust from re-entering the primary filter element 151. The dust-proof sheet 153 is funnel-shaped, and its diameter gradually increases along the direction away from the primary filter element 151 (i.e., the end closer to the primary filter element 151 is smaller, and the end farther away from the primary filter element 151 is larger). The dust-proof sheet 153 is made of transparent material. A baffle 154 is provided at the lower end of the secondary filter element 152 (i.e., the end furthest from the negative pressure pipe 4). A recessed portion 1541 is provided in the central area of the baffle 154, extending towards the secondary filter element 152. This recessed portion 1541 extends smoothly outwards from the center of the baffle 154, forming a bowl-shaped or funnel-shaped concave structure. The depth, radius of curvature, and other parameters of the recessed portion 1541 can be optimized according to actual design requirements. Dust trapped by the secondary filter element 152 falls downwards and eventually concentrates below the baffle 154, inside the primary filter element 151. When airflow fluctuations occur within the device, causing the trapped dust to become airborne again, the airborne dust moves upwards under the influence of the airflow and first impacts the surface of the baffle 154. At this point, the recessed portion 1541 of the baffle 154 possesses unique aerodynamic characteristics. The curved shape of the recessed portion 1541 can alter the flow direction and velocity distribution of the airflow. Specifically, when dust particles impact the recessed portion 1541 with the airflow, the airflow will change direction along the curved surface of the recessed portion 1541, throwing the dust particles towards the edge area of the recessed portion 1541 instead of continuing to move upwards. This further enhances the dust control effect of the baffle 154, effectively preventing dust from re-entering the secondary filter element 152, ensuring the filtration effect and stable operation of the device.
[0025] like Figure 2 , Figure 3 , Figure 6As shown, the first snap-fit structure 141 includes a first fixing block 1411, a second fixing block 1412 and a first locking member 1413. The first fixing block 1411 is disposed on the main cylinder 11, the second fixing block 1412 is disposed on the connecting ring 12, and the first locking member 1413 connects the first fixing block 1411 and the second fixing block 1412. In this embodiment, the first fixing block 1411 is provided with a groove 14111, and the first locking member 1413 includes a collar 1414 and a retainer 1415. The retainer 1415 is rotatably connected to the second fixing block 1412 through a rotating member 1416 (e.g., a pin). The collar 1414 is U-shaped and its two ends are rotatably connected to the two sides of the retainer 1415. The collar 1414 can be fitted onto the groove 14111. In use, when the retainer 1415 is rotated relative to the rotating member 1416, the position of the collar 1414 can be changed, thereby hooking the collar 1414 onto the groove 14111, realizing the fixing effect of the first fixing block 1411 relative to the second fixing block 1412. When the first fixing block 1411 and the second fixing block 1412 are locked, the rotatable connection between the sleeve 1415 and the collar 1414 and the rotating member 1416 are located on different vertical planes. Furthermore, in the direction away from the connecting ring 12, the rotating member 1416 is further away from the connecting ring 12 than the rotatable connection between the sleeve 1415 and the collar 1414. Taking the rotating member 1416 as a reference point, the side facing closer to the connecting ring 12 is the inner side of the rotating member 1416, and the side facing away from the connecting ring 12 is the outer side of the rotating member 1416. When the connection between the sleeve 1415 and the collar 1414 is adjusted to the inner range of the rotating member 1416, the collar 1414 can be confined within the groove 14111, thus fixing the first fixing block 1411 and the second fixing block 1412. When the connection between the sleeve 1415 and the collar 1414 is located outside the rotating member 1416, the collar 1414 can be removed from the groove 14111, releasing the fixing state of the first fixing block 1411 and the second fixing block 1412. The second snap-fit structure 142 has the same structure as the first snap-fit structure 141, and will not be described in detail here. A plurality of first snap-fit structures 141 and second snap-fit structures 142 are provided. The multiple first snap-fit structures 141 and multiple second snap-fit structures 142 are staggered in vertical position. Through the first snap-fit structures 141 and second snap-fit structures 142, the connection structure between the connecting ring 12 and the main cylinder 11 and between the connecting ring 12 and the dust collection cylinder 13 is simple and easy to use, and the disassembly and installation are convenient and quick.
[0026] like Figure 2 , Figure 3 , Figure 7As shown, the third locking structure 143 includes a third fixing block 1431, a fourth fixing block 1432, and a second locking member 1433. The third fixing block 1431 is disposed on the first cap 16, and the fourth fixing block 1432 is disposed on the main cylinder 11. The second locking member 1433 connects the third fixing block 1431 and the fourth fixing block 1432. The second locking member 1433 includes a bolt 1434 and a nut 1435. The bolt 1434 passes through both the cooperating third fixing block 1431 and the fourth fixing block 1432, and is threadedly connected to two nuts 1435 at both ends of the bolt 1434, thereby achieving a detachable connection between the first cap 16 and the main cylinder 11. The structures of the fourth locking structure 144 and the fifth locking structure 145 are the same as those of the third locking structure 143, and will not be described in detail here. Several third snap-fit structures 143, fourth snap-fit structures 144, and fifth snap-fit structures 145 are provided. Through the third snap-fit structures 143, fourth snap-fit structures 144, and fifth snap-fit structures 145, the connection structure between the first cap 16 and the main cylinder 11, between the second cap 17 and the primary filter element 151, and between the third cap 18 and the secondary filter element 152 is simple and easy to use, and disassembly and installation are convenient and quick.
[0027] like Figure 8As shown, the return cylinder 3 is cylindrical in shape, and its internal space is used to accommodate the material to be processed. A stirring mechanism 8 is installed inside the return cylinder 3. The stirring mechanism 8 includes a rotating ring 81, a bottom ring 82, a stirring shaft 83, a connecting shaft 84, and a drive mechanism 85. A hole 321 is provided on the cover plate 32, through which the first pipe 6 passes. The rotating ring 81 is rotatably mounted on the inner wall of the hole 321. In this embodiment, a mounting groove (not shown) is provided on the inner wall of the hole 321, and a bearing is installed in the mounting groove. The rotating ring 81 is mounted on the inner ring of the bearing. The bottom ring 82 is located at the end of the cylinder 31 away from the hole 321 and is fixedly connected to the rotating ring 81 via the connecting shaft 84. Several bases 821 are distributed circumferentially on the bottom ring 82, and the stirring shaft 83 is mounted on each base 821. The drive mechanism 85 is fixedly installed inside the return cylinder 3 and is connected to the rotating ring 81. In this embodiment, each base 821 extends away from the center of the bottom ring 82. The extension length is reasonably set according to the size of the return cylinder 3 and the stirring requirements. Each base 821 is provided with at least two stirring shafts 83, and each stirring shaft 83 is perpendicular to the base 821. Optionally, the stirring shaft 83 can be cylindrical, prismatic, or other irregular shapes. When the first pipe 6 is absorbing material, the drive mechanism 85 is activated to drive the rotating ring 81 to rotate, causing the stirring shaft 83 to rotate inside the return cylinder 3, which can agitate the material and break it up to avoid blockage during absorption. The drive mechanism 85 includes a motor 851, a linkage gear 852, and a drive gear 853. The motor 851 is fixedly installed on the inner wall of the return cylinder 3. The linkage gear 852 is sleeved on the end of the rotating ring 81 facing the inner wall of the return cylinder 3. The drive gear 853 is fixedly connected to the drive end of the motor 851, and the drive gear 853 meshes with the linkage gear 852. The motor 851 can drive the drive gear 853 to rotate through the drive end. The drive gear 853 meshes with the linkage gear 852, so as the drive gear 853 rotates, it can drive the linkage gear 852 to rotate, which in turn drives the rotating ring 81 and the connected connecting shaft 84, bottom ring 82 and stirring shaft 83 to rotate, so as to realize the stirring action of the stirring shaft 83 on the material.
[0028] When the automatic suction and filtration dust return device of this embodiment starts working, the negative pressure system is activated to generate negative pressure, creating a negative pressure environment throughout the device, thereby adsorbing the material in the return cylinder 3. At this time, the motor 851 in the return cylinder 3 starts, and the drive end of the motor 851 drives the drive gear 853 to rotate. The rotation of the drive gear 853 drives the linkage gear 852 to rotate, and the linkage gear 852 drives the rotating ring 81 to rotate on the inner wall of the hole 321 on the cover plate 32. The rotating ring 81 drives the bottom ring 82 to rotate through the connecting shaft 84. Several bases 821 distributed circumferentially on the bottom ring 82 rotate accordingly, and the stirring shaft 83 set on each base 821 rotates synchronously. The stirring shaft 83 rotates and agitates the material in the return cylinder 3, breaking up the material and preventing blockage when the material is sucked in by the first pipe 6. Under the action of negative pressure, the material in the return cylinder 3 is drawn into the storage box 5 through the first pipe 6. The grid plate in the storage box 5 disperses the material, so that the dust can be effectively extracted and guided under the action of airflow. Material passing through the mesh plate falls into the storage cylinder under gravity, while dust in the material moves with the airflow. The airflow carrying dust enters the filter cartridge 1 through the second pipe 7. In the filter cartridge 1, air first enters the primary filter element 151, which can filter large particles of 50μm, and these large particles fall into the dust collection cylinder 13. The filtered air enters the primary filter element 151 and is then filtered by the secondary filter element 152, which can filter small particles of 20μm. The filtered dust slides down the inner wall of the funnel-shaped guide ring 121 with a gradually decreasing diameter inside the connecting ring 12 into the dust collection cylinder 13. The dust-proof plate 153 on the lower closed end of the primary filter element 151 prevents dust from re-entering the primary filter element 151, and the recessed part 1541 of the baffle 154 at the lower end of the secondary filter element 152 changes the airflow direction and velocity distribution to prevent dust from re-entering the secondary filter element 152. Finally, the relatively pure gas enters the secondary filter element 152 and then enters the negative pressure system through the negative pressure pipe 4.
[0029] This device is suitable for use as an external component in automatic feeding systems. It can feed materials via vacuum suction or compressed air. To achieve precise feeding, it can be equipped with a weighing sensor or metering device to accurately control the amount of material fed. It coordinates and monitors the entire feeding process, automatically starting and stopping the feeding, and adjusting the feeding speed and amount according to the set parameters and the needs of the injection molding machine. It has a built-in filter assembly. This device is used for feeding recycled or crushed materials that cannot be granulated directly to the machine. The device is portable and can be disassembled and cleaned independently. It has a service life of 30 days. To clean the inner filter element, connect the air pipe through the suction outlet.
[0030] When processing recycled materials, this device connects a filter cartridge 1 before the negative pressure system to filter the air, preventing dust from entering the negative pressure system and protecting the equipment. It can also absorb dust in the recycled materials, allowing the crushed recycled materials to be used directly, reducing subsequent processing.
[0031] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0032] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.
Claims
1. An automatic material suction, filtration, and dust return device, characterized in that, include: The return feeder is used to hold materials. A storage box, which is connected and communicates with the return cylinder, is used to disperse materials to increase material gaps; A storage cylinder, which is connected and communicates with the storage box, is used to store materials after dust removal. A filter cartridge is connected and communicates with the storage box. A negative pressure pipe is provided on the filter cartridge, and the end of the negative pressure pipe away from the filter cartridge is connected to a negative pressure system. The filter cartridge includes a main cylinder, and a filter assembly is provided inside the main cylinder. The filter assembly is used to perform multi-stage filtration on the dust-laden air entering from the storage box.
2. The automatic material suction, filtration, and dust return device according to claim 1, characterized in that, The filtration assembly includes a primary filter element and a secondary filter element. The secondary filter element is disposed inside the primary filter element. Both the primary and secondary filter elements are disposed at the end of the main cylinder near the negative pressure pipe. The negative pressure pipe is inserted into the secondary filter element.
3. The automatic material suction, filtration, and dust return device according to claim 2, characterized in that, The end of the primary filter element away from the negative pressure pipe is a closed end, and a dust-proof sheet is provided on the closed end. The dust-proof sheet is funnel-shaped, and the diameter of the dust-proof sheet gradually increases along the direction away from the primary filter element.
4. The automatic material suction, filtration, and dust return device according to claim 2, characterized in that, The secondary filter element is provided with a baffle at the end away from the negative pressure pipe. The central area of the baffle has a recessed part that is recessed towards the secondary filter element. The recessed part extends in a smooth curved shape from the center of the baffle.
5. The automatic material suction, filtration, and dust return device according to claim 1, characterized in that, The filter cartridge includes a connecting ring and a dust collection tube. The main cylinder and the connecting ring are connected by a first snap-fit structure, and the dust collection tube and the connecting ring are connected by a second snap-fit structure. The main cylinder is in communication with the dust collection tube.
6. The automatic material suction, filtration, and dust return device according to claim 5, characterized in that, The connecting ring is provided with a guide ring, which is funnel-shaped and its diameter gradually decreases along the direction away from the main cylinder.
7. The automatic material suction, filtration, and dust return device according to claim 5, characterized in that, The first snap-fit structure includes a first fixing block, a second fixing block, and a first locking member. The first fixing block is disposed on the main cylinder, and the second fixing block is disposed on the connecting ring. The first fixing block is provided with a groove. The first locking member includes a collar and a sleeve. The sleeve is rotatably connected to the second fixing block through a rotating member. The two ends of the collar are rotatably connected to the two sides of the order sleeve. The collar can be fitted onto the groove.
8. The automatic material suction, filtration, and dust return device according to claim 2, characterized in that, The main cylinder is provided with a first cap, which is connected to the main cylinder through a third snap-fit structure. The primary filter element is provided with a second cap, which is connected to the primary filter element through a fourth snap-fit structure. The secondary filter element is provided with a third cap, which is connected to the secondary filter element through a fifth snap-fit structure. The negative pressure tube passes through the first cap, the second cap, and the third cap in sequence and is inserted into the secondary filter element. The negative pressure tube is provided with a limiting ring, which is connected to the third cap. By pulling the limiting ring away from the secondary filter element, both the secondary filter element and the primary filter element can be installed close to the first cap.
9. The automatic material suction, filtration, and dust return device according to claim 8, characterized in that, The third locking structure includes a third fixing block, a fourth fixing block, and a second locking member. The third fixing block is disposed on the first cap, and the fourth fixing block is disposed on the main cylinder. The third fixing block and the fourth fixing block are respectively provided with connecting holes. The second locking member includes a bolt and a nut. The bolt passes through both the third fixing block and the fourth fixing block. Two nuts are respectively connected to both ends of the bolt, and the two nuts are threadedly connected to the bolt.
10. The automatic material suction, filtration, and dust return device according to claim 1, characterized in that, The return material cylinder is equipped with a stirring mechanism, which includes a rotating ring, a bottom ring, a stirring shaft, and a driving mechanism. The return material cylinder has holes, and the rotating ring is rotatably mounted on the inner wall of the holes. The bottom ring is located inside the return material cylinder and connected to the rotating ring. Several bases are distributed circumferentially on the bottom ring, and the stirring shaft is located on each base. The driving mechanism is fixedly installed inside the return material cylinder and is connected to the rotating ring.