Smoke and dust cleaning mechanism for cast pipe production
By employing a dual cleaning method of magnetic field separation and jet scraping, the problem of damage to dust collector bags and impurity removal caused by iron oxide dust in pipe casting production has been solved, achieving efficient and stable operation of the dust removal system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NEODIC (QINGDAO) ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2026-04-02
- Publication Date
- 2026-05-12
AI Technical Summary
During the pipe casting process, iron oxide fumes generated during molten iron pouring enter the flue gas, causing damage to the dust collector bags and making it difficult to clean the impurities.
The system uses magnetic field components to separate metal particles, combined with a cleaning mechanism that performs dual cleaning through air jetting and scraping, thus protecting the dust collector bag and removing impurities.
It effectively prevents wear and tear on dust collector bags, improves dust collection efficiency, extends bag life, and ensures stable operation of the dust collection system.
Smart Images
Figure CN122007115A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of cast iron pipe production, specifically to a flue gas and dust cleaning mechanism for cast iron pipe production. Background Technology
[0002] Cast iron pipes, pipes formed by casting cast iron, often produce dust during the processing of the castings. This dust is mostly composed of metallic powder, so we need to filter it to remove it.
[0003] Existing flue gas dust cleaning devices use a scraping mechanism to scrape the filter screen, and then a collection mechanism collects the scraped dust. However, in actual use, when there is too much dust on the scraping base, the scraping effect on the filter screen is weakened. Furthermore, if the dust inside the collection box is not cleaned in time, the dust can be drawn into the device by the air intake. To solve these problems, reference can be made to the prior art (Chinese patent application number CN202322069750.1, application date 2023-08-02). A dust filtration device for pipe casting is disclosed. This device, through a scraping mechanism, uses a moving component to control a scraper to scrape the filter screen during operation. After scraping, the scraper can be disassembled via a snap-fit component to clean the dust off the scraper, thus enhancing the scraping effect on the filter screen. Reference can also be made to a dust removal device for pipe casting disclosed in prior art (Chinese Patent Application No. CN202322102163.8, filed on 2023-08-05), which uses a moving component to control a scraper to scrape the filter screen. The auxiliary dust collection mechanism, during use, operates a first motor that, in conjunction with a sliding rod, moves a scraper to facilitate the cleaning of dust adhering to the filter plate, preventing clogging and improving efficiency. A second motor, in conjunction with a limiting plate, moves a residual gear, causing the right suction port to move, allowing for a wider suction angle, increasing effectiveness while reducing worker workload. Finally, reference can be made to existing technology (Chinese Patent Application No. CN202322485129.3, application date 2023-09-13). The disclosed energy-saving bag filter for cast iron pipe processing allows for dust removal when internal cleaning is required. This is achieved by controlling an electric telescopic rod to insert an air jet into the filter bags, followed by controlling a blower to blow air onto the bags, removing dust adhering to the surface filters. A displacement component cleans each filter bag individually, and after the dust is dispersed, a dust discharge component guides the dust into a water tank for collection, preventing dust re-entrainment. Furthermore, the device generates minimal noise during operation, enhancing its environmental friendliness.
[0004] Although the above-mentioned device can treat dust during use, it still has certain shortcomings. During the production of cast iron pipes, when molten iron is poured, the high-temperature molten iron comes into contact with air, molding sand, and coatings, which will generate iron oxide dust, forming extremely fine metal oxide dust. This dust rises with the hot airflow and enters the flue gas. Excessive metal oxides will cause irreversible damage to the dust collector bags in the later stages, and the impurities adhering to the surface of the dust collector bags are not easy to clean.
[0005] Therefore, we propose a flue gas dust cleaning mechanism for pipe casting production to solve the problems mentioned above. Summary of the Invention
[0006] The purpose of this invention is to provide a flue gas dust cleaning mechanism for cast pipe production, in order to solve the problems mentioned in the background art. In the current market, during the production of cast pipes, when molten iron is poured at high temperature, it comes into contact with air, molding sand, and coatings, which generates iron oxide dust, forming extremely fine metal oxide dust. This dust rises with the hot air flow and enters the flue gas. Excessive metal oxides will cause irreversible damage to the dust collector bag in the later stages, and the impurities adhering to the surface of the dust collector bag are not easy to clean.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a flue gas dust cleaning mechanism for pipe casting production, comprising a dust collection hood and a purification treatment box. The dust collection hood is connected to the purification treatment box via a conveying pipe. An induced draft power component is installed on the outside of the purification treatment box. A pretreatment box is connected to the left side of the purification treatment box. An exhaust port is provided on the top of the purification treatment box. A magnetic field component is installed inside the pretreatment box and is movably disposed within the pretreatment box for separating metal particles in the dust. The magnetic field component is linked to an opening mechanism, which is used to control the opening and closing of the conveying pipe outlet. A dust collector bag is movably disposed in the middle of the inner side of the purification treatment box. A fixed motor is installed inside the purification treatment box. The fixed motor is connected to a cleaning mechanism, which acts on the outside of the dust collector bag to clean impurities adhering to the surface of the dust collector bag.
[0008] Preferably, the bottom of the pretreatment box has a conical opening, and the bottom of the pretreatment box is connected to a metal collection box, while the bottom of the purification treatment box is connected to a collection frame.
[0009] Preferably, the magnetic field component includes a drive screw rotatably disposed within the pretreatment box and an electromagnetic pole plate threadedly connected to the drive screw. A normally closed switch is provided on one side of the bottom of the electromagnetic pole plate. A protrusion corresponding to the normally closed switch is provided inside the pretreatment box. The protrusion is used to trigger the normally closed switch to control the power supply to the electromagnetic pole plate. The opening mechanism includes a closing plate fixed to the electromagnetic pole plate. The closing plate is slidably disposed within the conveying pipe. A blocking block is fixed to the bottom of the electromagnetic pole plate. The blocking block is adapted to the outlet of the pretreatment box.
[0010] Preferably, the electromagnetic pole plate has a square structure and is slidably disposed inside the pretreatment box. The power input end of the drive screw is connected to a drive motor, which is mounted on the pretreatment box.
[0011] Preferably, the cleaning mechanism includes a cam rod fixedly connected to the output end of a fixed motor, and the cam rod is provided with a first cleaning part and a second cleaning part; the first cleaning part includes a first movable rod rotatably connected to the cam rod and a horizontal plate rotatably connected to the first movable rod, the horizontal plate is slidably disposed between the dust collector bag and the purification treatment box, an air jet pipe is rotatably disposed on the horizontal plate, the air jet pipe is connected to an air storage bag through an air delivery hose, and the air storage bag is disposed inside the purification treatment box.
[0012] Preferably, a rotating gear is fixed on the jet pipe, and a matching rack is fixed inside the purification treatment box. The rotating gear meshes with the matching rack, and the rotation range of the jet pipe is -30° to 30°.
[0013] Preferably, the air storage bladder is made of elastic rubber, the air storage bladder has a one-way air inlet, the horizontal plate is attached to the top of the dust collector bag, and the horizontal plate separates from the inlet of the collection frame when it slides to the far right.
[0014] Preferably, the second cleaning part includes a top rod that fits against the cam rod. The top rod is connected to a truss via a return spring. A movable block is slidably disposed inside the truss. A second movable rod is rotatably connected to the movable block. The second movable rod is rotatably connected to the purification treatment box via a rotating shaft. The end of the second movable rod is positioned towards the dust collector bag.
[0015] Preferably, the top rod is slidably disposed inside the purification treatment box, and a transverse plate is fixed to the end of the second movable rod facing the dust collector bag body, the transverse plate being in contact with the outer side of the dust collector bag body.
[0016] Preferably, the dust collector bag is connected to the purification treatment box via a guide member. The guide member includes a movable rod fixed to the dust collector bag and a fixed cylinder fixed to the purification treatment box. The movable rod is slidably disposed inside the fixed cylinder. A connecting spring connects the movable rod and the fixed cylinder. The upper and lower ends of the dust collector bag are respectively connected to the inner wall of the top of the purification treatment box and the top of the horizontal plate via elastic sealing gaskets to prevent dust from seeping in through the sliding gap.
[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: This flue gas dust cleaning mechanism for pipe casting production is equipped with a movable magnetic field component in the pretreatment box. The magnetic attraction of electromagnetic plates efficiently separates metal oxide particles from the flue gas. A linked opening mechanism coordinates the opening and closing of the conveying pipeline with the magnetic attraction operation, intercepting metal dust at the source and preventing it from entering the dust collector bags and causing irreversible wear, thus significantly extending the service life of the bags. Simultaneously, the cleaning mechanism, driven by a fixed motor, integrates a dual cleaning structure of air jetting and scraping. The air jet pipe can rotate within a range of -30° to 30°, achieving all-around air jetting cleaning of the outside of the dust collector bags. The scraping structure physically removes stubborn impurities adhering to the bag surface. This dual action ensures more thorough bag cleaning and effectively prevents bag blockage. Furthermore, metal particles and ordinary dust are collected separately through metal collection boxes and collection frames, preventing secondary dust entrainment and improving overall dust removal efficiency. This design is suitable for high-temperature flue gas dust treatment scenarios in pipe casting production, ensuring the long-term stable operation of the dust removal system. Specific details are as follows: 1. During the process of driving the lead screw to raise and lower the electromagnetic pole plate, the opening and closing of the conveying pipeline and the opening and closing of the electromagnetic pole plate are completed simultaneously. The coordinated action of each component can be achieved without additional control components, which simplifies the control logic of the mechanism and reduces the operation and maintenance costs of the equipment. At the same time, the magnetic separation method of the electromagnetic pole plate is physical separation, and the metal collection box can recycle the separated metal oxide particles, realizing the secondary utilization of resources. 2. The rotation of the cam rod synchronously drives the jet cleaning and scraping cleaning actions, which greatly reduces the use of drive components, simplifies the internal structure of the equipment, and reduces the manufacturing cost and failure probability. The dust collector bag is elastically connected to the purification treatment box through guide components. When the cleaning mechanism is working, the bag can generate slight vibration to help remove the dust adhering to the surface and further improve the dust removal effect. In addition, each collection structure adopts a conical opening design, which allows the collected dust to slide down quickly and avoids accumulation in the box, effectively preventing dust blockage and secondary dust. 3. The high-pressure gas generated by the cam rod squeezing the air storage bag forms a fan-shaped airflow surface. The jet pipe achieves external coverage cleaning of the filter bag through axial sliding and ±30° circumferential swing, solving the problem of only being able to treat one side of the air inlet. Furthermore, the external jet and flexible vibration cleaning work together to effectively prevent filter bag blockage and maintain high filtration efficiency. At the same time, no additional high-pressure power components are required, simplifying the structure and reducing energy consumption. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the pretreatment box and the purification box of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the pretreatment box of the present invention; Figure 4 This is a schematic diagram of the main cross-sectional structure of the purification treatment box of the present invention; Figure 5 This is a schematic diagram of the main structure of the jet pipe of the present invention; Figure 6 This is a schematic diagram of the horizontal plate structure of the present invention viewed from below; Figure 7 This is a schematic diagram of the rear view of the second movable rod of the present invention; Figure 8 This is a side view schematic diagram of the truss structure of the present invention; Figure 9 This is a schematic diagram of the main cross-sectional structure of the guide component of the present invention; Figure 10 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 11 For the present invention Figure 4 Enlarged structural diagram at point B.
[0019] In the diagram: 1. Dust collection hood; 2. Conveying pipe; 3. Pretreatment box; 4. Metal collection box; 5. Purification treatment box; 6. Collection frame; 7. Drive screw; 8. Electromagnetic plate; 9. Protrusion; 10. Closing plate; 11. Blocking block; 12. Fixed motor; 13. Cam rod; 14. First movable rod; 15. Horizontal plate; 16. Jet pipe; 17. Rotating gear; 18. Matching rack; 19. Air accumulator; 20. Air delivery hose; 21. Top rod; 22. Truss; 23. Movable block; 24. Second movable rod; 25. Rotating shaft; 26. Dust collector bag body; 27. Guide component; 271. Moving rod; 272. Fixed cylinder; 273. Connecting spring. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Please see Figures 1-11 The present invention provides the following technical solution: Example 1: To address the problem that during the production of cast iron pipes on the market, when molten iron is poured at high temperatures, it comes into contact with air, molding sand, and coatings, generating iron oxide dust. This dust forms extremely fine metal oxide particles that rise with the hot air flow and enter the flue gas. Excessive metal oxides can cause irreversible damage to the dust collector bags later on. Please refer to the attached... Figure 1 -Appendix Figure 3 and Figure 10 The dust collection hood 1 and the purification treatment box 5 are connected. The dust collection hood 1 is connected to the purification treatment box 5 through the conveying pipe 2. An exhaust fan is installed on the outside of the purification treatment box 5. A pretreatment box 3 is connected to the left side of the purification treatment box 5. The purification treatment box 5 has an exhaust port. A magnetic field is installed inside the pretreatment box 3. The magnetic field is movably installed inside the pretreatment box 3 and is used to separate metal particles in the dust. The magnetic field is linked to an opening mechanism, which is used to control the opening and closing of the outlet of the conveying pipe 2. The bottom of the pretreatment box 3 has a conical opening and is connected to a metal collection box 4. A collection frame 6 is connected to the bottom of the purification treatment box 5. The magnetic field includes a drive wire that is rotatably installed inside the pretreatment box 3. The pretreatment box 3 has a rod 7 and an electromagnetic pole plate 8 threadedly connected to the drive screw 7. The bottom side of the electromagnetic pole plate 8 is provided with a normally closed switch. The pretreatment box 3 is provided with a protrusion 9 corresponding to the normally closed switch. The protrusion 9 is used to trigger the normally closed switch to control the power supply of the electromagnetic pole plate 8. The opening mechanism includes a closing plate 10 fixed to the electromagnetic pole plate 8. The closing plate 10 is slidably disposed in the conveying pipe 2. A blocking block 11 is fixed at the bottom of the electromagnetic pole plate 8. The blocking block 11 is adapted to the outlet of the pretreatment box 3. The electromagnetic pole plate 8 has a square structure and is slidably disposed inside the pretreatment box 3. The power input end of the drive screw 7 is connected to a drive motor, which is mounted on the pretreatment box 3.
[0022] First, the induced draft fan is activated via the control panel, generating negative pressure suction. The flue gas containing metal oxide dust generated during the casting process is collected by the dust collection hood 1 and then transported to the pretreatment box 3 via the conveying pipe 2. Simultaneously, the drive motor is activated via the control panel, causing the drive screw 7 to rotate. The square electromagnetic plate 8, threadedly connected to the drive screw 7, slides downwards along the inner wall of the pretreatment box 3. During this sliding process, the normally closed switch at the bottom of the electromagnetic plate 8 contacts and is triggered by the protrusion 9 inside the pretreatment box 3, activating the power supply to the electromagnetic plate 8 and generating a magnetic field. As the electromagnetic plate 8 slides downwards, its fixed closing plate 10 slides synchronously within the conveying pipe 2, opening the outlet of the conveying pipe 2. The flue gas smoothly enters the pretreatment box 3, where the metal oxide particles are adsorbed by the magnetic field and separated from the flue gas, adhering to the surface. On the surface of the electromagnetic plate 8, metal dust is intercepted at the source, preventing it from entering the dust collector bag 26 and causing wear. At this time, the blocking block 11 blocks the outlet of the pretreatment box 3. When the amount of metal particles adsorbed by the electromagnetic plate 8 reaches a certain amount, the control panel controls the drive motor to reverse, and the drive screw 7 drives the electromagnetic plate 8 to slide upward. The normally closed switch separates from the protrusion 9, the electromagnetic plate 8 is de-energized and demagnetized, and the adsorbed metal particles fall off and slide into the metal collection box 4 through the conical opening at the bottom of the pretreatment box 3 for collection. The top of the blocking block 11 is arc-shaped, which can also prevent metal particles from remaining. At the same time, the electromagnetic plate 8 drives the closing plate 10 to slide upward to close the conveying pipe 2. The blocking block 11 at the bottom moves away from the outlet of the pretreatment box 3 to prevent the collected metal particles from being rolled up again by the airflow, thus completing the separation and collection of metal dust.
[0023] Example 2: To address the problem of difficult-to-clean impurities adhering to the surface of the dust collector bag, please refer to the attached... Figure 4 -Appendix Figure 6 and Figure 11A dust collector bag 26 is movably disposed inside the middle of the purification treatment box 5. A fixed motor 12 is installed inside the purification treatment box 5. The fixed motor 12 is connected to a cleaning mechanism. The cleaning mechanism acts on the outside of the dust collector bag 26 to clean impurities adhering to the surface of the dust collector bag 26. The cleaning mechanism includes a cam rod 13 fixedly connected to the output end of the fixed motor 12. A first cleaning part and a second cleaning part are provided on the cam rod 13. The first cleaning part includes a first movable rod 14 rotatably connected to the cam rod 13 and a horizontal plate 15 rotatably connected to the first movable rod 14. The horizontal plate 15 is slidably disposed between the dust collector bag 26 and the purification treatment box 5. Between the boxes 5, a jet pipe 16 is rotatably mounted on the horizontal plate 15. The jet pipe 16 is connected to an air accumulator 19 via an air supply hose 20. The air accumulator 19 is located inside the purification treatment box 5. A rotating gear 17 is fixed on the jet pipe 16. A matching rack 18 is fixed inside the purification treatment box 5. The rotating gear 17 and the matching rack 18 are meshed and connected. The rotation range of the jet pipe 16 is -30° to 30°. The air accumulator 19 is made of elastic rubber and has a one-way air inlet. The horizontal plate 15 is attached to the top of the dust collector bag 26, and the horizontal plate 15 separates from the inlet of the collection frame 6 when it slides to the far right.
[0024] When the cam rod 13 rotates, it drives the first movable rod 14, which is rotatably connected to its inner side, to perform a reciprocating push-pull motion. The first movable rod 14 drives the horizontal plate 15 to slide back and forth between the dust collector bag body 26 and the purification treatment box 5. During the sliding of the horizontal plate 15, the jet pipe 16, which is rotatably set above it, moves synchronously with the horizontal plate 15. The horizontal plate 15 also pushes the impurities scattered inside the purification treatment box 5, making it convenient for collection and unloading. The rotating gear 17 at the top of the jet pipe 16 meshes with the matching rack 18 inside the purification treatment box 5, driving the jet pipe 16 to reciprocate within the range of -30° to 30°. Since the jet pipe 16 oscillates back and forth around its own axis as the center of rotation... Its initial vertical position is based on 0°. The maximum clockwise rotation angle towards the dust collector bag body 26 is 30°, and the maximum counterclockwise rotation angle is also 30°. The jet pipe 16 is installed on the end face of the horizontal plate 15 facing the dust collector bag body 26, with a horizontal gap between it and the outer side of the dust collector bag body 26. The jet nozzle of the jet pipe 16 faces the outer wall of the dust collector bag body 26 throughout its entire length. The sliding stroke of the horizontal plate 15 is adapted to the axial length of the dust collector bag body 26, and the jet pipe 16 covers the outer axial area of the dust collector bag body 26 along the sliding trajectory of the horizontal plate 15. Simultaneously, during the rotation of the cam rod 13, the air accumulator 19 inside the purification treatment box 5 is continuously compressed, and the elastic rubber material... The air accumulator 19 draws in air through a one-way inlet. After being compressed, the internal air is delivered to the jet pipe 16 through the air delivery hose 20. During its movement, the jet pipe 16 sprays air omnidirectionally onto the outside of the dust collector bag 26. The air accumulator 19 is made of elastic rubber and is fixed in the cavity between the inner wall of the purification treatment box 5 and the dust collector bag 26. The volume of the air accumulator 19 is 1.5-2L. The working process between the air accumulator 19 and the cam rod 13 is as follows: when the protruding end of the cam rod 13 rotates to contact the air accumulator 19, it linearly compresses the air accumulator 19, causing the internal air pressure of the air accumulator 19 to rise instantaneously. The compressed gas is then rapidly delivered to the jet pipe through the air delivery hose 20. 16. High-speed jetting from the jet nozzle; when the non-protruding end of the cam rod 13 rotates to the airbag position, the compression is released, and the air accumulator 19 quickly draws in the filtered clean air from the purification chamber 5 through the one-way air inlet, completing the air accumulation and preparing for the next air compression; the continuous rotation of the cam rod 13 can ensure the continuity of jetting and the stability of air pressure, blowing off the dust adhering to the surface of the dust collector bag 26. The blown-off dust slides into the collection frame 6 at the bottom of the purification chamber 5 for collection; the horizontal plate 15 is always in contact with the bottom of the dust collector bag 26, and separates from the inlet of the collection frame 6 when it slides to the far right, which not only prevents dust from escaping from the top of the bag, but also avoids obstructing the dust collection.
[0025] Example 3: This example differs from Example 2 in that it allows for further cleaning during use. Please refer to the attached document. Figure 7 -Appendix Figure 9The second cleaning section includes a top rod 21 that fits against the cam rod 13. The top rod 21 is connected to a truss 22 via a return spring. A movable block 23 is slidably disposed inside the truss 22. A second movable rod 24 is rotatably connected to the movable block 23. The second movable rod 24 is rotatably connected to the purification treatment box 5 via a rotating shaft 25. The end of the second movable rod 24 faces the dust collector bag body 26. The top rod 21 is slidably disposed inside the purification treatment box 5. A transverse plate is fixed to the end of the second movable rod 24 facing the dust collector bag body 26. The transverse plate is attached to the outer surface of the dust collector bag body 26. The dust collector bag 26 is connected to the purification treatment box 5 via a guide 27. The guide 27 includes a movable rod 271 fixed to the dust collector bag 26 and a fixed cylinder 272 fixed to the purification treatment box 5. The movable rod 271 is slidably disposed inside the fixed cylinder 272. A connecting spring 273 is connected between the movable rod 271 and the fixed cylinder 272. The upper and lower ends of the dust collector bag 26 are respectively connected to the top inner wall of the purification treatment box 5 and the top of the horizontal plate 15 via elastic sealing gaskets to prevent dust from seeping in through the sliding gap.
[0026] After the fixed motor 12 is started via the control panel, during the rotation of the cam rod 13, its outer side continuously contacts and pushes the top rod 21 to slide upward along the inner wall of the purification treatment box 5. The top rod 21 compresses the return spring and pushes the movable block 23 inside the truss 22 to slide upward. The movable block 23 drives the second movable rod 24, which is rotatably connected to it, to rotate around the rotating shaft 25. The transverse plate at the end of the second movable rod 24 approaches and presses against the outside of the dust collector bag body 26. The heat-resistant elastic rubber transverse plate at the end of the second movable rod 24 approaches and flexibly presses against the outside of the dust collector bag body 26. When the cam rod 13 separates from the top rod 21, the elastic force of the return spring drives the top rod 21 and the movable block 23 to return to their original positions. The second movable rod 24 rotates in the opposite direction, and the transverse plate separates from the dust collector bag body 26. When the cam rod 13 separates from the top rod 21, the elastic force of the return spring drives the top rod 21 and the movable block 23 to return to their original positions. 23 resets, the second movable rod 24 rotates in the opposite direction, and the transverse plate separates from the dust collector bag body 26; during this process, the dust collector bag body 26 is reciprocatedly squeezed by the transverse plate, and its right side is elastically connected to the purification treatment box 5 through the guide 27. When the dust collector bag body 26 is squeezed, it drives the moving rod 271 to slide along the fixed cylinder 272 and compress the connecting spring 273. When reset, the elastic force of the connecting spring 273 drives the moving rod 271 to reset, causing the dust collector bag body 26 to generate high-frequency slight vibration; the vibration mode is combined with the air jet cleaning mode to completely shake off the stubborn dust adhering to the surface of the bag, further improving the cleaning effect. The shaken-off dust is also collected through the collection frame 6. After double cleaning, the dust collector bag body 26 can maintain good filtration performance and extend its service life; the clean flue gas after being cleaned by the pretreatment box 3 and filtered by the dust collector bag body 26 is finally discharged through the exhaust port of the purification treatment box 5.
[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A dust removal mechanism for flue gas in pipe casting production, comprising a dust collection hood (1) and a purification treatment box (5), wherein the dust collection hood (1) is connected to the purification treatment box (5) via a conveying pipe (2), characterized in that: The purification treatment box (5) is connected to the pretreatment box (3) on the left side; a magnetic field component is provided in the pretreatment box (3), which is movably installed in the pretreatment box (3) to separate metal particles in the dust. The magnetic field component is linked to an opening mechanism, which is used to control the opening and closing of the outlet of the conveying pipe (2); a dust collector bag (26) is movably installed in the middle of the inner side of the purification treatment box (5). A fixed motor (12) is installed in the purification treatment box (5), and the fixed motor (12) is connected to a cleaning mechanism. The cleaning mechanism acts on the outside of the dust collector bag (26) to clean the impurities adhering to the surface of the dust collector bag (26).
2. The flue gas and dust cleaning mechanism for pipe casting production according to claim 1, characterized in that: The bottom of the pretreatment box (3) is a conical opening, and the bottom of the pretreatment box (3) is connected to a metal collection box (4), and the bottom of the purification box (5) is connected to a collection frame (6).
3. The flue gas and dust cleaning mechanism for pipe casting production according to claim 1, characterized in that: The magnetic field component includes a drive screw (7) rotatably disposed in the pretreatment box (3) and an electromagnetic pole plate (8) threadedly connected to the drive screw (7). A normally closed switch is provided on one side of the bottom of the electromagnetic pole plate (8). A protrusion (9) corresponding to the normally closed switch is provided in the pretreatment box (3). The protrusion (9) is used to trigger the normally closed switch to control the power supply of the electromagnetic pole plate (8). The opening mechanism includes a closing plate (10) fixed to the electromagnetic pole plate (8). The closing plate (10) is slidably disposed in the conveying pipe (2). A blocking block (11) is fixed at the bottom of the electromagnetic pole plate (8). The blocking block (11) is adapted to the outlet of the pretreatment box (3).
4. The flue gas and dust cleaning mechanism for pipe casting production according to claim 3, characterized in that: The electromagnetic pole plate (8) has a square structure and is slidably disposed inside the pretreatment box (3). The power input end of the drive screw (7) is connected to a drive motor, which is mounted on the pretreatment box (3).
5. The flue gas and dust cleaning mechanism for pipe casting production according to claim 1, characterized in that: The cleaning mechanism includes a cam rod (13) fixedly connected to the output end of a fixed motor (12). The cam rod (13) is provided with a first cleaning part and a second cleaning part. The first cleaning part includes a first movable rod (14) rotatably connected to the cam rod (13) and a horizontal plate (15) rotatably connected to the first movable rod (14). The horizontal plate (15) is slidably disposed between the dust collector bag body (26) and the purification treatment box (5). An air jet pipe (16) is rotatably disposed on the horizontal plate (15). The air jet pipe (16) is connected to an air storage bag (19) through an air delivery hose (20). The air storage bag (19) is disposed inside the purification treatment box (5).
6. The flue gas and dust cleaning mechanism for pipe casting production according to claim 5, characterized in that: A rotating gear (17) is fixed on the jet pipe (16), and a matching rack (18) is fixed inside the purification treatment box (5). The rotating gear (17) meshes with the matching rack (18), and the rotation range of the jet pipe (16) is -30° to 30°.
7. The flue gas and dust cleaning mechanism for pipe casting production according to claim 5, characterized in that: The air storage bag (19) is made of elastic rubber. The air storage bag (19) is provided with a one-way air inlet. The horizontal plate (15) is attached to the top of the dust collector bag body (26). When the horizontal plate (15) slides to the rightmost side, it separates from the inlet of the collection frame (6).
8. The flue gas and dust cleaning mechanism for pipe casting production according to claim 5, characterized in that: The second cleaning unit includes a top rod (21) that fits against the cam rod (13). The top rod (21) is connected to a truss (22) via a return spring. A movable block (23) is slidably arranged inside the truss (22). A second movable rod (24) is rotatably connected to the movable block (23). The second movable rod (24) is rotatably connected to the purification treatment box (5) via a rotating shaft (25). The end of the second movable rod (24) is set toward the dust collector bag body (26).
9. A flue gas and dust cleaning mechanism for pipe casting production according to claim 8, characterized in that: The top rod (21) is slidably disposed inside the purification treatment box (5). The second movable rod (24) has a horizontal plate fixed at the end facing the dust collector bag body (26). The horizontal plate is attached to the outside of the dust collector bag body (26). The material of the horizontal plate is a heat-resistant elastic rubber material with a Shore hardness of 55-65HA. Its flexible end face is attached to the outside of the dust collector bag body (26).
10. A flue gas dust cleaning mechanism for pipe casting production according to claim 8, characterized in that: The dust collector bag body (26) is connected to the purification treatment box (5) through the guide member (27). The guide member (27) includes a moving rod (271) fixed to the dust collector bag body (26) and a fixed cylinder (272) fixed to the purification treatment box (5). The moving rod (271) is slidably disposed in the fixed cylinder (272). A connecting spring (273) is connected between the moving rod (271) and the fixed cylinder (272). The upper and lower ends of the dust collector bag body (26) are respectively connected to the top inner wall of the purification treatment box (5) and the top of the horizontal plate (15) through elastic sealing gaskets to prevent dust from seeping in through the sliding gap.