Gas filtering device for 3D printing equipment
By designing an alternating adsorption and independently replaceable gas filtration device, the problem of decreased activated carbon treatment effect in 3D printing equipment was solved, achieving efficient gas filtration and inert gas recycling, thus improving the equipment's operational stability and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-13
- Publication Date
- 2026-03-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
After prolonged use, the activated carbon in the gas filtration devices of existing 3D printing equipment deteriorates, leading to the leakage of harmful gases and the inert gases that cannot be effectively recycled, thus affecting printing quality and efficiency.
A gas filtration device including an adsorption component, an air intake component, a recovery component, and a replacement component was designed. Alternating adsorption is achieved through the switching of the annular filter and the gear-driven filter. The adsorption tube and activated carbon can be replaced independently. The drive component and the electric clamping frame are used to achieve efficient replacement of activated carbon blocks and efficient gas treatment.
It achieves efficient gas filtration and recovery, avoids activated carbon clogging and reduced processing efficiency, facilitates regular replacement of activated carbon, and improves the working stability of 3D printing equipment and the utilization rate of inert gas.
Smart Images
Figure CN121714992A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of gas filtration device technology, and more particularly to a gas filtration device for 3D printing equipment. Background Technology
[0002] In the process of printing parts using 3D printing equipment (SLM technology), the laser irradiates the metal powder layer to generate a molten metal pool. This process needs to be carried out in a low-oxygen atmosphere. Therefore, an inert protective gas (argon, nitrogen) needs to be continuously supplied to the molten metal interface. After passing through the molten metal pool, the inert gas carries away oxide particles and some metal particles generated during the melting and solidification process, and enters the circulating air path. These impurities in the inert gas, namely oxide and metal particles, need to be filtered out and the gas collected for reuse. Otherwise, it will lead to waste of inert gas, low density of printed parts, and even failure of 3D printed parts. Therefore, the gas filtration device in 3D printing equipment is crucial.
[0003] In existing 3D printers, gases and tiny particles are generated during operation. These emissions primarily originate from the melting and decomposition of printing materials (such as plastic filaments) at high temperatures. Studies have shown that the gases released by 3D printers mainly include two types of harmful components: ultrafine particles (UFP): particles with a diameter of less than 0.1 micrometers, which can penetrate deep into the lungs and even enter the bloodstream; and volatile organic compounds (VOCs): including chemicals such as styrene, formaldehyde, and lactide.
[0004] Harmful gases generated during the operation of 3D printers need to be treated, which generally relies on the principle of activated carbon adsorption. However, the treatment effect of activated carbon gradually decreases with prolonged use, which can easily lead to the leakage of harmful gases and their mixing with inert gases. It is also inconvenient to replace the activated carbon in a timely manner. Summary of the Invention
[0005] This disclosure aims to at least partially address one of the technical problems in the related art.
[0006] Therefore, the purpose of this disclosure is to provide a gas filtration device for 3D printing equipment.
[0007] To achieve the above objectives, this disclosure provides a gas filtration device for 3D printing equipment, comprising: a mounting plate, an adsorption assembly on the top of the mounting plate, an air inlet assembly on the top of the adsorption assembly, a recovery assembly mounted on the inner ring of the mounting plate, a driving assembly at the center of the top of the adsorption assembly, and a replacement assembly at the bottom of the inlet end of the air inlet assembly; the air inlet assembly includes a circular frame, an annular filter screen rotatably mounted inside the circular frame, a conveying pipe fixed to the bottom of the filter screen and extending out of the bottom of the circular frame, and an air inlet on the side of the circular frame; the adsorption assembly includes an upper circular plate, a lower circular plate of the same radius at the bottom of the upper circular plate, and five equidistant openings on the surfaces of the upper and lower circular plates. The upper and lower circular plates each have a circular hole, and an adsorption tube is installed at the circular hole position. Activated carbon blocks are fixedly installed inside the adsorption tube. The bottom of the conveying pipe corresponds to the top of one set of adsorption tubes. The driving assembly includes a gear, which is fixed at the top center of the upper circular plate, and the upper and lower circular plates are fixedly connected by a shaft. The recovery assembly includes a fan box, which is rotatably installed at the bottom of the lower circular plate. A gas storage pipe is fixed at the bottom of the fan box, and a gas inlet is fixed at the bottom of the gas storage pipe. The replacement assembly includes a rotating frame, which is rotatably installed at the top of the air inlet. One side of the rotating frame corresponds to the adsorption tube, and a blocking column is installed on the outside of the rotating frame. The blocking column and the adsorption tube are symmetrically arranged on both sides of the rotating frame.
[0008] Optionally, a vertical frame is fixed to the side of the mounting plate away from the replacement component, and a baffle is fixed to the top of the vertical frame. The baffle covers the top of the upper circular plate, and a fixing frame is fixed to the top of the baffle. One end of the fixing frame is fixedly connected to the circular frame. The baffle has a notch at the position corresponding to the bottom of the conveying pipe, and the conveying pipe connects to the adsorption pipe through the notch of the baffle.
[0009] Optionally, the air intake assembly further includes: a collection box, a sealing plate, and a partition. The partition is fixed at equal intervals inside the circular frame on the outside of the filter screen. The other side of the partition slides along the inner wall of the circular frame. The bottom of the circular frame away from the air intake is hollowed out, and the collection box is snapped into the hollowed-out bottom of the circular frame. The sealing plate is fixed on the top of the circular frame near the hollowed-out side. The sealing plate is semi-circular and slides along the inner ring of the filter screen.
[0010] Optionally, the drive assembly further includes: a first motor and a gear ring, wherein the first motor is fixedly mounted on the top of the gear corresponding to the fixed frame, and the output end of the first motor is fixedly connected to the gear, and a gear ring is fixedly mounted on the outer surface of the bottom of the conveying pipe, and the gear ring meshes with the gear.
[0011] Optionally, the adsorption assembly further includes: a tube, a movable ring, and a first spring. The movable ring is slidably installed on the inner ring of the circular hole of the upper circular plate. The movable ring is slidably inserted into the top of the adsorption tube. The tube is slidably inserted into the circular hole of the lower circular plate and is slidably inserted into the bottom of the adsorption tube. The first spring is fixedly fixed at equal intervals on the top of the movable ring, and the other end of the first spring is fixedly connected to the inner wall of the through hole of the upper circular plate.
[0012] Optionally, the recycling assembly further includes: a vertical tube, a fixing plate, and a connecting tube. The bottom of the insert tube is slidably connected to the vertical tube, and the bottom of the vertical tube is fixed to the fixing plate. The outer ring of the fan box is provided with a rotating layer. The fixing plate is fixed on the rotating layer of the fan box. The bottom of the vertical tube is fixed to the side facing the rotating layer of the fan box, and the connecting tube is in sliding contact with the outer surface of the rotating layer. The rotating layer of the fan box has a through hole that alternately connects to five connecting tubes.
[0013] Optionally, a second spring is fitted onto the outer surface of the bottom of the insert tube through the vertical tube, and the bottom of the second spring is fixedly connected to the bottom of the insert tube. A cover plate is fixed inside the insert tube at the top of the vertical tube. A turbine is rotatably installed inside the vertical tube, and a speed sensor is installed at the bearing of the turbine.
[0014] Optionally, the replacement component further includes: a bidirectional electric push rod and a push plate. The bidirectional electric push rod is fixedly installed inside the rotating frame, and push plates are fixed to the two extended ends of the bidirectional electric push rod. An upper convex plate is fixed to the surface of the moving ring facing the outer ring of the first ring, and a lower convex plate is fixed to the surface of the insertion tube facing the outer ring of the first ring. The push plates at both ends of the bidirectional electric push rod are in contact with the upper and lower convex plates.
[0015] Optionally, a moving groove is provided on the outer ring surface of the upper circular plate at the position where the upper convex plate protrudes, and the upper convex plate slides along the inside of the moving groove.
[0016] Optionally, a second motor is fixed at the bottom of the air inlet corresponding to the position of the rotating frame, and the output end of the second motor is fixedly connected to the rotating frame. Electric clamping frames are installed on both sides of the rotating frame, and the two sets of electric clamping frames respectively clamp the blocking column and the adsorption tube.
[0017] The technical solution provided in this disclosure may include the following beneficial effects: 1. This invention uses a ring-shaped filter for isolation and filtration. A first motor drives a gear to rotate, and the gear meshes with the gear ring to drive the conveying pipe, filter, and baffle to rotate inside the circular frame. This causes the filter surface corresponding to the air inlet to switch continuously, preventing blockage. At the same time, the baffle cleans debris. When it moves to the side away from the air inlet, the debris can fall into the collection box through the perforations, cleaning the circular frame and filter. The collection box can be disassembled for internal cleaning. The rotation of the gear in the drive component also drives the entire adsorption component to rotate, thus aligning different adsorption tubes with the conveying pipe for alternating adsorption, efficiently treating the mixed gas, and facilitating the replacement of new adsorption tubes and activated carbon. The baffle in the inner ring of the filter can block the perforated parts, thus preventing debris from being sucked out of the collection box again. 2. In this invention, when the insert tube is inserted into the bottom of the adsorption tube, the cover plate separates from the top of the vertical tube. At this time, the entire gas path is connected. When the insert tube is moved downward to disassemble the adsorption tube, the cover plate covers the top of the vertical tube, blocking the entire passage and preventing the flow and leakage of gas. 3. The present invention uses five sets of adsorption tubes in alternating ways to avoid the activated carbon receiving too much gas at once, which would lead to low treatment efficiency and rapid decline in adsorption capacity. In addition, each set of adsorption tubes is set independently, which is convenient for replacement of components without affecting the normal use of the other sets of adsorption tubes. 4. This invention utilizes a plug to seal the circular holes of the upper and lower circular plates. The position of the rotating frame and the distance between the plug and the adsorption tube can satisfy the need for two sets of rotational replacement without touching other adsorption tubes. Furthermore, the two sets of electric clamping frames work independently. Simply put, the rotation of the two clamping frames can be electrically driven to clamp the outside of the plug and the adsorption tube. Under normal conditions, the electric clamping frame on the side of the adsorption tube is in the open state. At the same time, the clamping and releasing of the plug and the adsorption tube by the two sets of electric clamping frames are also independently controlled, which makes it convenient to remove and replace the adsorption tubes that have failed due to the activated carbon block. 5. In this invention, when the adsorption assembly rotates with the drive assembly, the upper and lower convex plates can slide along the top and bottom of the two push plates respectively without interfering with the rotation of the adsorption assembly. When it is detected that the activated carbon adsorption capacity inside a certain adsorption tube is insufficient, the adsorption tube is located at the bottom of the air intake assembly. The two push plates are moved by the bidirectional electric push rod, pushing the upper convex plate upward along the moving groove and pushing the lower convex plate downward. Then, the moving ring and the insertion tube are inserted into the adsorption tube and respectively into the circular holes of the upper and lower circular plates, releasing the insertion limit of the moving ring and the insertion tube on both ends of the adsorption tube. Then, the outer end of the adsorption tube is clamped by the electric clamping frame, and the rotating frame is rotated by the second motor to replace the position of the plug column and the adsorption tube, making it convenient to remove the adsorption tube and replace the activated carbon block inside.
[0018] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of a gas filtration device for 3D printing equipment according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram showing the connection between the adsorption component and the air intake component in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 3 This is a schematic diagram showing the connection between a replacement component and an adsorption tube and a plug column in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 4 This is a schematic diagram of a replacement component structure in a gas filtration device for 3D printing equipment according to an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the internal structure of a circular frame in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 6 This is a schematic diagram showing the separation of the sealing plate and collection box from the air intake assembly in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 7 This is a schematic diagram of the internal structure of the adsorption tube in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 8 This is a schematic diagram of the connection between the moving ring and the upper circular plate in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 9 This is a schematic diagram of the connection between the insert tube and the lower circular plate in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; Figure 10 This is a schematic diagram of the internal structure of the insertion tube and connecting tube in a gas filtration device for 3D printing equipment according to an embodiment of this disclosure; As shown in the figure: 1. Intake assembly; 11. Circular frame; 12. Intake port; 13. Collection box; 14. Delivery pipe; 15. Sealing plate; 16. Filter screen; 17. Partition plate; 2. Adsorption assembly; 21. Adsorption tube; 22. Upper circular plate; 23. Lower circular plate; 24. Insertion tube; 25. Lower convex plate; 26. Moving groove; 27. Upper convex plate; 28. Activated carbon block; 29. Moving ring; 210. First spring; 211. Cover plate; 3. Recycling components; 31. Fan box; 32. Air storage pipe; 33. Air outlet; 34. Vertical pipe; 35. Fixing plate; 36. Connecting pipe; 37. Second spring; 38. Turbine; 4. Mounting plate; 41. Vertical frame; 42. Fixing frame; 43. Baffle; 5. Drive assembly; 51. First motor; 52. Gear; 53. Gear ring; 6. Replace components; 61. Rotating frame; 62. Second motor; 63. Two-way electric push rod; 64. Push plate; 65. Electric clamping frame; 66. Blocking column. Detailed Implementation
[0020] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, this disclosure proposes a gas filtration device for a 3D printing equipment, comprising: a mounting plate 4, an adsorption assembly 2 on the top of the mounting plate 4, an air inlet assembly 1 on the top of the adsorption assembly 2, a recovery assembly 3 mounted on the inner ring of the mounting plate 4, a driving assembly 5 at the center of the top of the adsorption assembly 2, and a replacement assembly 6 at the bottom of the inlet end of the air inlet assembly 1; the air inlet assembly 1 includes a circular frame 11, an annular filter screen 16 rotatably mounted inside the circular frame 11, and a conveying pipe 14 fixed to the bottom of the filter screen 16. 14 extends through the bottom of the circular frame 11, and an air inlet 12 is provided on the side of the circular frame 11; the adsorption assembly 2 includes an upper circular plate 22, and a lower circular plate 23 of the same radius is provided at the bottom of the upper circular plate 22. Five circular holes are equidistantly provided on the surfaces of the upper circular plate 22 and the lower circular plate 23, and adsorption tubes 21 are installed at the positions of the circular holes of the upper circular plate 22 and the lower circular plate 23. Activated carbon blocks 28 are fixedly installed inside the adsorption tubes 21. The bottom of the conveying pipe 14 corresponds to the top of one set of adsorption tubes 21; the driving assembly 5 includes a gear 52, which is fixed on... The upper circular plate 22 is located at the top center, and the upper circular plate 22 and the lower circular plate 23 are fixedly connected by a shaft; the recycling component 3 includes a fan box 31, which is rotatably mounted on the bottom of the lower circular plate 23. An air storage pipe 32 is fixed to the bottom of the fan box 31, and an air inlet 33 is fixed to the bottom of the air storage pipe 32; the replacement component 6 includes a rotating frame 61, which is rotatably mounted on the top of the air inlet 12. One side of the rotating frame 61 corresponds to the adsorption pipe 21, and a blocking column 66 is installed on the outer side of the rotating frame 61. The blocking column 66 and the adsorption pipe... The air inlets 12 and 21 are symmetrically arranged on both sides of the rotating frame 61. When using the device, the air inlet 12 is connected to the printing chamber of the 3D printing equipment. During printing, the air inlet component 1 draws out the gas and debris. After the filter 16 of the air inlet component 1 filters the debris, the gas is sent into the adsorption component 2. The activated carbon block 28 in the adsorption tube 21 adsorbs the harmful gases in the gas. The inert gas is sent into the recovery component 3. The recovery component 3 can return the inert gas to the inside of the printing equipment for reuse. When the adsorption capacity of the activated carbon block 28 decreases significantly, it is replaced by the replacement component 6.
[0022] like Figure 2 As shown, in some embodiments, a vertical frame 41 is fixed to the side of the mounting plate 4 away from the replacement component 6, and a baffle 43 is fixed to the top of the vertical frame 41. The baffle 43 covers the top of the upper circular plate 22, and a fixing frame 42 is fixed to the top of the baffle 43. One end of the fixing frame 42 is fixedly connected to the circular frame 11. The baffle 43 has a notch at the position corresponding to the bottom of the conveying pipe 14, and the conveying pipe 14 is connected to the adsorption pipe 21 through the notch of the baffle 43.
[0023] It is understandable that the device is fixed and installed by mounting plate 4, vertical frame 41 and fixing frame 42. The sealing plate 15 covers the top of the upper circular plate 22 and blocks the upper end of the adsorption tube 21 except the bottom of the delivery tube 14, thus protecting the activated carbon block 28 inside. The device can be installed at the outside of the 3D printing equipment by vertical frame 41, or the device can be installed inside the 3D printing equipment by setting an installation cavity inside the 3D printing equipment.
[0024] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the air intake assembly 1 further includes: a collection box 13, a sealing plate 15, and a partition 17. The partition 17 is fixed at equal intervals inside the circular frame 11 on the outer side of the filter screen 16. The other side of the partition 17 slides along the inner wall of the circular frame 11. The bottom of the circular frame 11 away from the air intake port 12 is hollowed out, and the collection box 13 is snapped into the hollowed-out bottom of the circular frame 11. The sealing plate 15 is fixed on the top of the circular frame 11 near the hollowed-out side. The sealing plate 15 is semi-circular and slides along the inner ring of the filter screen 16. The drive assembly 5 further includes: a first motor 51 and a gear ring 53. The first motor 51 is fixed on the top of the fixed frame 42 corresponding to the gear 52, and the output end of the first motor 51 is fixedly connected to the gear 52. The gear ring 53 is fixed on the outer surface of the bottom of the conveying pipe 14, and the gear ring 53 meshes with the gear 52.
[0025] Understandably, the air inlet 12 is connected to the printing chamber of the 3D printing equipment to remove the gas generated during the 3D printing process and the input inert gas, and to suck the metal debris generated during printing into the circular frame 11. The debris is then filtered through the annular filter 16. The first motor 51 drives the gear 52 to rotate, and the gear 52 meshes with the gear ring 53, causing the conveying pipe 14, filter 16, and baffle 17 to rotate inside the circular frame 11. This causes the filter 16 corresponding to the air inlet to continuously switch surfaces, preventing blockage. Simultaneously, the baffle 17 serves to clean debris. On the side furthest from the air inlet, debris can fall into the collection box 13 through the perforation, cleaning the circular frame 11 and the filter screen 16. The collection box 13 can be disassembled for internal cleaning. At the same time, the rotation of the gear 52 of the drive component 5 will also drive the entire adsorption component 2 to rotate, thereby aligning different adsorption tubes 21 with the delivery tube 14 for alternating adsorption, efficiently treating the mixed gas, and facilitating the replacement of new adsorption tubes 21 and activated carbon. The baffle 43 on the inner ring of the filter screen 16 can block the perforated part, thus preventing debris from being sucked out of the collection box 13 again.
[0026] like Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, in some embodiments, the adsorption assembly 2 further includes: a tube 24, a moving ring 29, and a first spring 210. The moving ring 29 is slidably installed on the inner ring of the circular hole of the upper circular plate 22. The moving ring 29 is slidably inserted into the top of the adsorption tube 21. The tube 24 is slidably inserted into the circular hole of the lower circular plate 23. The tube 24 is slidably inserted into the bottom of the adsorption tube 21. The first spring 210 is fixed at equal intervals on the top of the moving ring 29, and the other end of the first spring 210 is fixedly connected to the inner wall of the through hole of the upper circular plate 22. The recovery assembly 3 further includes: a vertical tube 34, a fixing plate 35, and a connecting tube 36. The vertical tube 34 is slidably inserted into the bottom of the tube 24, and the fixing plate 35 is fixed to the bottom of the vertical tube 34. 5. The outer ring of the fan box 31 is provided with a rotating layer. The fixing plate 35 is fixed on the rotating layer of the fan box 31. The bottom of the vertical tube 34 is fixed with a connecting tube 36 on the side facing the rotating layer of the fan box 31. The connecting tube 36 slides in contact with the outer surface of the rotating layer. The rotating layer of the fan box 31 has a through hole that alternately connects with five connecting tubes 36. The bottom of the vertical tube 34 is inserted into the outer surface of the insertion tube 24 and a second spring 37 is sleeved on it. The bottom of the second spring 37 is fixedly connected to the bottom of the insertion tube 24. The inside of the insertion tube 24 is fixed with a cover plate 211 at the top of the vertical tube 34. The inside of the vertical tube 34 is rotatably installed with a turbine 38, and a speed sensor is installed at the bearing of the turbine 38.
[0027] Regarding the treatment of solid waste pollution and air pollution: The printing process generates ultrafine particles, which, if left untreated, will cause solid waste pollution. Furthermore, the chemical substances such as styrene, formaldehyde, and lactide produced during high-temperature melting and decomposition will cause air pollution. The conventional treatment method uses high-efficiency activated carbon for adsorption. It should be noted that the adsorption component 2 consists of five sets of adsorption tubes 21, an upper circular plate 22, and a lower circular plate 23. The drive component 5 can rotate the five sets of adsorption tubes 21 to the bottom of the conveying pipe 14. The conveying pipe 14 and the adsorption tubes 21 are connected through the through holes in the upper and lower circular plates 22 and 23. The process is then completed by the recovery component. The negative pressure of the fan box 31 in unit 3 allows the gas entering through the air intake assembly 1 to be sent into the adsorption tube 21. Harmful gases generated during 3D printing can be adsorbed by the activated carbon block 28 inside the adsorption tube 21. Argon, due to its inert nature, cannot be adsorbed by the activated carbon and thus continues to move downwards through the adsorption tube 21 for recovery by the recovery assembly 3. Here, the five sets of adsorption tubes 21 are used alternately to avoid the activated carbon receiving too much gas at once, which would lead to low processing efficiency and a rapid decline in adsorption capacity. Furthermore, each set of adsorption tubes 21 is independently set up, facilitating independent replacement in conjunction with the replacement assembly 6 without affecting the operation of the other sets of adsorption tubes 21. In common use, the movable ring 29 and the insertion tube 24 inside the circular holes of the upper circular plate 22 and the lower circular plate 23 are movable. Therefore, during installation, the movable ring 29 and the insertion tube 24 can be inserted into the top and bottom of the adsorption tube 21 to limit its movement. During disassembly, simply retract the movable ring 29 and the insertion tube 24 into their respective circular holes, and the adsorption tube 21 can be removed directly. After the inert gas is sent out through the adsorption tube 21 and the insertion tube 24, it enters the gas storage tube 32 through the vertical pipe 34 and the connecting pipe 36 via the fan box 31. The gas outlet at the bottom of the gas storage tube 32 can be connected to the inert gas storage device of the 3D printing equipment through a pipe to realize the recycling of inert gas. When the adsorption tube 21 is inserted to the bottom, the cover plate 211 separates from the top of the vertical tube 34, and the entire gas path is connected. When the insertion tube 24 is moved downward to remove the adsorption tube 21, the cover plate 211 covers the top of the vertical tube 34, blocking the entire passage and preventing gas flow and leakage. In addition, a turbine 38 and a wind speed sensor are installed inside the vertical tube 34. When normal inert gas passes through the vertical tube 34, it will drive the turbine 38 to rotate, and its speed can be measured. When its speed is similar to that of the other four groups, it indicates that the activated carbon adsorption is good. If the speed decreases, the activated carbon needs to be replaced. This method is one way to test the adsorption of activated carbon. Other methods can also be used for testing.
[0028] like Figure 3 and Figure 4As shown, in some embodiments, the replacement component 6 further includes: a bidirectional electric push rod 63 and a push plate 64. The bidirectional electric push rod 63 is fixedly installed inside the rotating frame 61, and the two extended ends of the bidirectional electric push rod 63 are fixed with push plates 64. An upper convex plate 27 is fixed on the surface of the moving ring 29 facing the outer ring of the first ring, and a lower convex plate 25 is fixed on the surface of the insertion tube 24 facing the outer ring of the first ring. The push plates 64 at both ends of the bidirectional electric push rod 63 are in contact with the upper convex plate 27 and the lower convex plate 25. A moving groove 26 is provided on the outer ring surface of the upper circular plate 22 corresponding to the position through which the upper convex plate 27 passes, and the upper convex plate 27 slides along the inside of the moving groove 26. A second motor 62 is fixed at the bottom of the air inlet 12 corresponding to the position of the rotating frame 61, and the output end of the second motor 62 is fixedly connected to the rotating frame 61. Electric clamping frames 65 are installed on both sides of the rotating frame 61, and the two sets of electric clamping frames 65 clamp the blocking column 66 and the adsorption tube 21 respectively.
[0029] It should be noted that when the adsorption assembly 2 rotates with the drive assembly 5, the upper convex plate 27 and the lower convex plate 25 can slide along the top and bottom of the two push plates 64 respectively, without interfering with the rotation of the adsorption assembly 2. When it is detected that the activated carbon adsorption capacity inside a certain adsorption tube 21 is insufficient, the adsorption tube 21 is located at the bottom of the air intake assembly 1. The two push plates 64 are moved by the bidirectional electric push rod 63, pushing the upper convex plate 27 upward along the moving groove 26 and pushing the lower convex plate 25 downward. This causes the moving ring 29 and the insertion tube 24 to be inserted into the adsorption tube 21, respectively, and into the circular holes of the upper circular plate 22 and the lower circular plate 23. This releases the insertion limit of the moving ring 29 and the insertion tube 24 on both ends of the adsorption tube 21. Then, the outer end of the adsorption tube 21 is clamped by the electric clamping frame 65 and driven by the second motor 62. The rotating frame 61 rotates, replacing the positions of the plug column 66 and the adsorption tube 21, making it easy to remove the adsorption tube 21 and replace the internal activated carbon block 28. At the same time, the plug column 66 seals the round holes of the upper circular plate 22 and the lower circular plate 23. The position of the rotating frame 61 and the distance between the plug column 66 and the adsorption tube 21 can meet the requirements of two sets of rotation replacement without touching other adsorption tubes 21. Furthermore, the two sets of electric clamping frames 65 work independently. Simply put, the rotation of the two clamping frames can be electrically driven to clamp the plug column 66 and the adsorption tube 21 on the outside. Under normal conditions, the electric clamping frame 65 on the side of the adsorption tube 21 is in the open state. At the same time, the clamping and releasing of the two sets of electric clamping frames 65 on the plug column 66 and the adsorption tube 21 are also independently controlled, making it easy to remove and replace the adsorption tube 21 that has failed to activate the activated carbon block 28.
[0030] Working principle: When using the device, the air inlet 12 is connected to the printing chamber of the 3D printing equipment. During printing, the air inlet 12 is connected to the printing chamber of the 3D printing equipment to remove the gas generated during the 3D printing process and the input inert gas, and to suck the metal debris generated during printing into the circular frame 11. It is then filtered by the annular filter 16. The first motor 51 drives the gear 52 to rotate. The gear 52 meshes with the gear ring 53 to drive the conveying pipe 14, the filter 16, and the partition 17 to rotate inside the circular frame 11. This causes the filter 16 corresponding to the air inlet to switch continuously to avoid clogging. At the same time, the partition 17 serves to clean the debris. When it moves to the side away from the air inlet, the debris can fall into the collection box 13 through the perforation. The filter screen 16 is cleaned, and the collection box 13 can be disassembled for internal cleaning. Simultaneously, the rotation of the gear 52 in the drive assembly 5 also drives the entire adsorption assembly 2 to rotate, thus aligning different adsorption tubes 21 with the conveying pipe 14 for alternating adsorption, efficiently treating the mixed gas, and facilitating the replacement of new adsorption tubes 21 and activated carbon. The baffle 43 on the inner ring of the filter screen 16 can block the perforated parts, preventing debris from being drawn out of the collection box 13 again. The adsorption assembly 2 consists of five sets of adsorption tubes 21, an upper circular plate 22, and a lower circular plate 23. The drive assembly 5 can rotate the five sets of adsorption tubes 21 cyclically to the bottom of the conveying pipe 14. The through holes in the upper and lower circular plates 22 and 23 connect the conveying pipe 14 and the adsorption tubes 21. The process is completed through the recovery assembly. The negative pressure of the fan box 31 in section 3 allows the gas entering through the air intake assembly 1 to be sent into the adsorption tube 21. Harmful gases generated during 3D printing can be adsorbed by the activated carbon block 28 inside the adsorption tube 21. Argon, due to its inert nature, cannot be adsorbed by the activated carbon and thus continues to move downwards through the adsorption tube 21 for recovery by the recovery assembly 3. Here, the five sets of adsorption tubes 21 are used alternately to avoid the activated carbon receiving too much gas at once, which would lead to low processing efficiency and a rapid decline in adsorption capacity. Each set of adsorption tubes 21 is independently set up, facilitating independent replacement with the replacement assembly 6 without affecting the normal use of the other sets of adsorption tubes 21. The moving ring 29 inside the circular holes of the upper circular plate 22 and the lower circular plate 23... The tube 24 is movable, so during installation, it can be positioned by inserting the movable ring 29 and the insertion tube 24 into the top and bottom of the adsorption tube 21. During disassembly, simply retract the movable ring 29 and the insertion tube 24 into their respective holes, and the adsorption tube 21 can be removed directly. The inert gas, after being delivered through the adsorption tube 21 and the insertion tube 24, enters the gas storage tube 32 through the vertical tube 34 and the connecting tube 36 via the fan box 31. The outlet at the bottom of the gas storage tube 32 can be connected to the inert gas storage device of the 3D printing equipment via a pipe, enabling the recycling of the inert gas. When the insertion tube 24 is inserted into the bottom of the adsorption tube 21, the cover plate 211 separates from the top of the vertical tube 34, at which point the entire gas path is connected. When the insertion tube 24 moves downwards to disassemble the adsorption tube 21…Cover plate 211 covers the top of vertical pipe 34, blocking the entire passage and preventing gas flow and leakage. Additionally, a turbine 38 and a wind speed sensor are installed inside vertical pipe 34. When normal inert gas passes through vertical pipe 34, it drives turbine 38 to rotate, allowing for speed measurement. When its rotation speed is similar to the other four groups, it indicates good activated carbon adsorption. If the rotation speed decreases, the activated carbon needs to be replaced. This is one method for testing activated carbon adsorption; other methods can also be used for testing. Adsorption component 2 is included... When the drive assembly 5 rotates, the upper convex plate 27 and the lower convex plate 25 can slide along the top and bottom of the two push plates 64 respectively, without interfering with the rotation of the adsorption assembly 2. When it is detected that the activated carbon adsorption capacity inside a certain adsorption tube 21 is insufficient, the adsorption tube 21 is located at the bottom of the air intake assembly 1. The two push plates 64 are moved by the bidirectional electric push rod 63, pushing the upper convex plate 27 upward along the moving groove 26 and pushing the lower convex plate 25 downward, thereby inserting the moving ring 29 and the insertion tube 24 into one end of the adsorption tube 21. The tube 21 is inserted into the holes of the upper circular plate 22 and the lower circular plate 23. The insertion limit of the moving ring 29 and the insertion tube 24 on both ends of the adsorption tube 21 is released. Then, the outer end of the adsorption tube 21 is clamped by the electric clamping frame 65, and the rotating frame 61 is rotated by the second motor 62 to replace the position of the plug 66 and the adsorption tube 21, so that the adsorption tube 21 can be removed to replace the activated carbon block 28 inside. At the same time, the plug 66 is used to seal the holes of the upper circular plate 22 and the lower circular plate 23. The position of the rotating frame 61 is relative to the plug 66 and the adsorption tube 21. The distance of 1 unit allows for the rotation and replacement of two sets of adsorption tubes 21 without contacting other adsorption tubes 21. Furthermore, the two sets of electric clamping frames 65 operate independently. Simply put, the rotation of the two clamping frames is electrically driven, clamping the outer sides of the plugging column 66 and adsorption tube 21. Under normal conditions, the electric clamping frame 65 on one side of the adsorption tube 21 is in the open state. Simultaneously, the clamping and releasing of the two sets of electric clamping frames 65 on the plugging column 66 and adsorption tube 21 are also independently controlled, facilitating the removal and replacement of the adsorption tube 21 that has failed due to the activated carbon block 28.
[0031] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.
[0032] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.
[0033] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. 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.
[0034] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.
Claims
1. A gas filtration device for 3D printing equipment, characterized in that, include: Mounting plate (4), the top of the mounting plate (4) is provided with an adsorption component (2), the top of the adsorption component (2) is provided with an air intake component (1), the inner ring of the mounting plate (4) is provided with a recycling component (3), the top center of the adsorption component (2) is provided with a driving component (5), and the bottom of the inlet end of the air intake component (1) is provided with a replacement component (6). The air intake assembly (1) includes a circular frame (11), an annular filter (16) is rotatably installed inside the circular frame (11), a conveying pipe (14) is fixed at the bottom of the filter (16), and the conveying pipe (14) extends out of the bottom of the circular frame (11). An air intake port (12) is provided on the side of the circular frame (11). The adsorption assembly (2) includes an upper circular plate (22), and a lower circular plate (23) of the same radius is provided at the bottom of the upper circular plate (22). Five circular holes are equidistantly opened on the surfaces of the upper circular plate (22) and the lower circular plate (23), and adsorption tubes (21) are installed at the positions of the circular holes of the upper circular plate (22) and the lower circular plate (23). Activated carbon blocks (28) are fixedly installed inside the adsorption tubes (21), and the bottom of the conveying pipe (14) corresponds to the top of one of the adsorption tubes (21). The drive assembly (5) includes a gear (52), which is fixed at the top center of the upper circular plate (22), and the upper circular plate (22) and the lower circular plate (23) are fixedly connected by a shaft. The recycling component (3) includes a fan box (31), the fan box (31) is rotatably mounted on the bottom of the lower circular plate (23), the bottom of the fan box (31) is fixed with an air storage pipe (32), and the bottom of the air storage pipe (32) is fixed with an air outlet (33). The replacement component (6) includes a rotating frame (61). The rotating frame (61) is rotatably mounted on the top of the air inlet (12). One side of the rotating frame (61) corresponds to the adsorption tube (21), and a plug (66) is installed on the outside of the rotating frame (61). The plug (66) and the adsorption tube (21) are symmetrically arranged on both sides of the rotating frame (61).
2. The gas filtration device for 3D printing equipment according to claim 1, characterized in that, The mounting plate (4) is fixed with a vertical frame (41) on the side away from the replacement component (6), and a baffle (43) is fixed on the top of the vertical frame (41). The baffle (43) covers the top of the upper circular plate (22), and a fixing frame (42) is fixed on the top of the baffle (43). One end of the fixing frame (42) is fixedly connected to the circular frame (11). The baffle (43) has a notch at the bottom of the conveying pipe (14), and the conveying pipe (14) connects with the adsorption pipe (21) through the notch of the baffle (43).
3. The gas filtration device for 3D printing equipment according to claim 2, characterized in that, The intake assembly (1) further includes: The circular frame (11) has a collection box (13), a sealing plate (15), and a partition (17). The partition (17) is fixed at equal intervals inside the circular frame (11) on the outside of the filter screen (16). The other side of the partition (17) slides along the inner wall of the circular frame (11). The bottom of the circular frame (11) away from the air inlet (12) is hollowed out. The collection box (13) is snapped into the hollowed-out bottom of the circular frame (11). Among them, a sealing plate (15) is fixed on the top of the circular frame (11) near the hollow side. The sealing plate (15) is semi-circular and slides along the inner ring of the filter screen (16).
4. The gas filtration device for 3D printing equipment according to claim 3, characterized in that, The driving component (5) also includes: The first motor (51) and the gear ring (53) are fixed on the top of the fixed frame (42) corresponding to the gear (52), and the output end of the first motor (51) is fixedly connected to the gear (52). The gear ring (53) is fixed on the outer surface of the bottom of the conveying pipe (14), and the gear ring (53) meshes with the gear (52).
5. The gas filtration device for 3D printing equipment according to claim 1, characterized in that, The adsorption component (2) further includes: Insertion tube (24), moving ring (29), first spring (210), the moving ring (29) is slidably installed in the inner ring of the circular hole of the upper circular plate (22), the moving ring (29) is slidably inserted into the top of the adsorption tube (21), the insertion tube (24) is slidably inserted into the circular hole of the lower circular plate (23), and the insertion tube (24) is slidably inserted into the bottom of the adsorption tube (21); The top of the movable ring (29) is fixed with a first spring (210) at equal intervals, and the other end of the first spring (210) is fixedly connected to the inner wall of the through hole of the upper circular plate (22).
6. The gas filtration device for 3D printing equipment according to claim 5, characterized in that, The recycling component (3) also includes: The vertical tube (34), the fixing plate (35), and the connecting tube (36) are provided. The bottom of the insertion tube (24) is slidably inserted with the vertical tube (34), and the bottom of the vertical tube (34) is fixed with the fixing plate (35). The outer ring of the fan box (31) is provided with a rotating layer. The fixing plate (35) is fixed on the rotating layer of the fan box (31). The bottom of the vertical tube (34) is fixed with the connecting tube (36) on the side facing the rotating layer of the fan box (31). The connecting tube (36) is in sliding contact with the outer surface of the rotating layer. The rotating layer of the fan box (31) has a through hole that alternately connects to five connecting pipes (36).
7. A gas filtration device for 3D printing equipment according to claim 6, characterized in that, The vertical tube (34) is inserted into the outer surface of the bottom of the insertion tube (24) and a second spring (37) is sleeved thereon. The bottom of the second spring (37) is fixedly connected to the bottom of the insertion tube (24). The inside of the insertion tube (24) is fixed with a cover plate (211) at the top of the vertical tube (34). The vertical tube (34) is equipped with a turbine (38) that rotates inside, and a speed sensor is installed at the bearing of the turbine (38).
8. A gas filtration device for 3D printing equipment according to claim 7, characterized in that, The replacement component (6) also includes: The bidirectional electric push rod (63) and push plate (64) are fixedly installed inside the rotating frame (61). The two extended ends of the bidirectional electric push rod (63) are fixed with push plate (64). The upper convex plate (27) is fixed on the surface of the moving ring (29) facing the outer ring of the first ring. The lower convex plate (25) is fixed on the surface of the insertion tube (24) facing the outer ring of the first ring. The push plates (64) at both ends of the bidirectional electric push rod (63) are in contact with the upper convex plate (27) and the lower convex plate (25).
9. A gas filtration device for 3D printing equipment according to claim 8, characterized in that, A moving groove (26) is provided on the outer ring surface of the upper circular plate (22) at the position where the upper convex plate (27) protrudes, and the upper convex plate (27) slides along the inside of the moving groove (26).
10. A gas filtration device for 3D printing equipment according to claim 1, characterized in that: The bottom of the air inlet (12) is fixed with a second motor (62) corresponding to the position of the rotating frame (61), and the output end of the second motor (62) is fixedly connected to the rotating frame (61). Electric clamping frames (65) are installed on both sides of the rotating frame (61), and the two sets of electric clamping frames (65) clamp the plug (66) and the adsorption tube (21) respectively.