Gas safety protection device for aluminum casting production

Abstract

The invention discloses a gas safety protection device for aluminum casting production, and relates to the technical field of aluminum casting production, the gas safety protection device comprises a smelting furnace, a furnace frame, a protective cover and a dust removal box, the smelting furnace is installed on the furnace frame, the protective cover is installed on the furnace frame through a support, and a conveying pipe is arranged on the side wall of the smelting furnace; a forming mold is placed below the protective cover, the conveying pipe penetrates through the protective cover, and two air pipe openings are formed in the side of the protective cover in a penetrating mode. According to the innovative design of the dust collection assembly, all parts on the peripheral side of the dust collection bag make uniform contact with dust-containing gas, local blockage is avoided, and the dust collection uniformity and efficiency are greatly improved; through linkage of the infrared transmitter, the infrared receiver and the controller, non-stop dust removal of the cloth bag can be achieved. The whole process does not need to be stopped, the problem that production is interrupted due to cleaning of a traditional device is effectively avoided, and continuity of aluminum casting production is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum casting production, and particularly relates to a gas safety protection device for aluminum casting production. BACKGROUND

[0002] In the modern aluminum casting production process, aluminum materials need to be smelted into a molten state by a smelting furnace at high temperature, and then introduced into a forming mold through a conveying pipe to complete forming. However, the production process has significant gas safety hazards: the molten aluminum materials are easy to react with oxygen in the air under high-temperature environment to generate a large amount of aluminum oxide particles. These particles are scattered in the production environment in the form of dust and smoke, which seriously threatens the health of workers - short-term inhalation can cause acute respiratory inflammation, and symptoms such as cough, chest tightness, and difficulty breathing appear; long-term inhalation can cause aluminum dust to deposit in the lungs, inducing irreversible occupational diseases such as pneumoconiosis.

[0003] At the same time, the existing gas protection device in the aluminum casting production has obvious drawbacks. On the one hand, the traditional protection device relies on simple exhaust equipment and can only exhaust the dust-containing gas from the production area, which cannot effectively collect the aluminum oxide particles, resulting in direct emission of dust to the external environment, which not only pollutes the air but also wastes resources; on the other hand, some devices equipped with dust removal structures have the problems of low collection efficiency and easy clogging of the dust removal components (such as fixed dust collection bags), and frequent shutdown and disassembly for cleaning seriously affect the production continuity.

[0004] Based on this, the present application provides a gas safety protection device for aluminum casting production, which can eliminate the drawbacks of the existing device. SUMMARY

[0005] The purpose of the present application is to provide a gas safety protection device for aluminum casting production to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A gas safety protection device for aluminum casting production, comprising a smelting furnace, a furnace stand, a protective cover, and a dust removal box, wherein the furnace stand is installed with the smelting furnace, the furnace stand is installed with the protective cover through a support, the smelting furnace is provided with a conveying pipe on the side wall, the protective cover is placed with a forming mold below, the conveying pipe penetrates through the protective cover, two air pipes are provided on the side of the protective cover, a fan is installed at the air inlet of the dust removal box, one end of the air pipe away from the protective cover is connected with the fan, and an air outlet is formed in the side wall of the dust removal box. A dust collection assembly is arranged in the dust removal box to collect the aluminum oxide particles generated by casting.

[0007] On the basis of the above technical solutions, the present application further provides the following optional technical solutions: In an optional scheme, the dust collection assembly comprises a motor and a belt, the top wall and the bottom wall of the dust removal box are connected with a plurality of belt pulleys through rotating shafts, the upper surface and the lower surface of the dust removal box are provided with protective shells, the protective shells are provided with the motor, the output end of the motor is connected with the belt pulleys, the belt pulleys are jointly matched with the belt, the belt is provided with a plurality of fixing frames on the side, the fixing frames are fixedly connected with connecting blocks, the connecting blocks are rotatably connected with friction wheels, the upper surface and the lower surface of the dust removal box are provided with friction guide rails, the friction wheels abut against the friction guide rails, and the friction wheels are provided below the bag structure.

[0008] In an optional scheme, the bag structure comprises a driving rotor, a driven rotor and an outer frame, the lower surface of the friction wheel is fixedly connected with the driving rotor, the outer frame is slidably provided with an inner frame, the dust collection bag is clamped between the outer frame and the inner frame, the outer frame and the inner frame are fixed by bolts, and the inner frame and the outer frame are fixedly connected with the driven rotor.

[0009] In an optional scheme, the inner bottom wall and the inner top wall of the dust removal box are fixedly connected with guide rails, and the driven rotor is located in the guide rails.

[0010] In an optional scheme, the upper surface of the dust removal box is provided with an air compressor, the top wall of the dust removal box is provided with a blowing pipe, one end of the blowing pipe is connected with the air compressor, the blowing pipe is provided with an electromagnetic pulse valve, and the blowing pipe is located above the movement path of the bag structure.

[0011] In an optional scheme, the inner wall of the dust removal box is fixedly connected with a baffle.

[0012] In an optional scheme, the upper surface of the dust removal box is fixedly connected with a fixed pressing plate, the fixing frames above the dust removal box are provided with infrared emitters, the protective shells above the dust removal box are provided with an infrared receiver, the infrared receiver is located above the movement track of the infrared emitter, a pressing block slot is formed in the infrared emitter, a tactile switch is arranged in the pressing block slot, a spring is arranged between the pressing block and the inner wall of the pressing block slot, the pressing block abuts against the fixed pressing plate, the pressing block abuts against the tactile switch, the infrared receiver is electrically connected with a controller, and the air compressor is electrically connected with the controller.

[0013] In an optional scheme, the lower surface of the pressing block is provided with a ball.

[0014] In one alternative embodiment: a discharge box is provided on the lower surface of the dust collector box; a dust collection electrode plate is installed in the dust collector box; a corona electrode plate is installed on the side wall of the baffle; the dust collection electrode plate and the corona electrode plate are positioned opposite each other; the discharge box is located below the dust collection electrode plate; a valve is provided at the discharge port of the discharge box; the dust collection electrode plate is connected to the positive terminal of the electrode plate power supply; the corona electrode plate is connected to the negative terminal of the electrode plate power supply; and the electrode plate power supply is electrically connected to the controller.

[0015] In one alternative: the inner wall of the dust collection box is equipped with a cleaner for scraping off alumina particles from the surface of the dust collection plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a synergistic structure of a protective cover, a fan, and a dust collection box. First, the protective cover seals the casting area, preventing the spread of alumina dust. Then, the fan draws dust-laden gas through a duct into the dust collection box. Combining baghouse and electrostatic precipitators, it achieves highly efficient collection of alumina particles. The baghouse structure intercepts most of the dust in the gas, and subsequent electrostatic precipitators (using a combination of dust collection plates and corona discharge plates) transfer the alumina particles cleaned from the baghouse, significantly improving the alumina particle removal rate. This eliminates the threat of dust to workers' health at the source and reduces pollution to the surrounding environment.

[0017] The innovative design of the dust collection component in this invention involves a motor-driven pulley that rotates a belt, causing the filter bag structure to revolve along the belt's trajectory. Simultaneously, a friction wheel and friction guide rail work together to achieve rotation, ensuring uniform contact of the dust-laden gas with all parts of the filter bag, preventing localized blockages and significantly improving dust collection uniformity and efficiency. Furthermore, intelligent control of the filter bag cleaning process is achieved through the linkage of an infrared transmitter, receiver, and controller. When the filter bag moves to the area below the blowpipe, an infrared signal triggers the air compressor and electromagnetic pulse valve, injecting compressed air into the filter bag through the blowpipe, enabling non-stop cleaning. During cleaning, an electrostatic precipitator operates simultaneously, capturing detached dust and guiding it into the discharge box. The entire process requires no machine shutdown, effectively avoiding the production interruptions caused by cleaning in traditional devices and ensuring the continuity of aluminum casting production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a first-view diagram of the present invention.

[0020] Figure 3 This is a first-view view of the dust collection box of the present invention.

[0021] Figure 4 This is a second-view view of the dust collection box of the present invention.

[0022] Figure 5 This is a first-view view of the internal structure of the dust collector box of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0024] Figure 7 This is a second-view view of the internal structure of the dust collector box of the present invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the dust collector box of the present invention.

[0026] Figure 9 This is a schematic diagram of the active rotor structure of the present invention.

[0027] Figure 10 This is a schematic diagram of the bag structure of the present invention.

[0028] Figure 11 This is an exploded view of the bag structure of the present invention.

[0029] Figure label annotations: 1. Smelting furnace, 2. Furnace frame, 3. Conveying pipe, 4. Protective cover, 5. Molding mold, 6. Dust collector, 7. Fan, 8. Air pipe, 9. Protective shell, 10. Air compressor, 11. Discharge box, 12. Exhaust port, 13. Dust collection plate, 14. Corona discharge plate, 15. Baffle, 16. Motor, 17. Guide rail, 18. Pulley, 19. Belt, 20. Friction guide rail, 21. Infrared receiver, 22. Infrared transmitter, 23. Pressing block, 24. Fixing frame, 25. Connecting block, 26. Friction wheel, 27. Driving rotor, 28. Driven rotor, 29. Inner frame, 30. Outer frame, 31. Dust collection bag, 32. Blowpipe, 33. Cleaner, 34. Fixing pressure plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] In one embodiment, such as Figures 1-11 As shown, a gas safety protection device for aluminum casting production includes a smelting furnace 1, a furnace frame 2, a protective cover 4, and a dust collection box 6. The furnace frame 2 is equipped with the smelting furnace 1, and the protective cover 4 is installed on the furnace frame 2 via a bracket. A transport pipe 3 is provided on the side wall of the smelting furnace 1, and a forming mold 5 is placed below the protective cover 4. The transport pipe 3 passes through the protective cover 4, and two gas pipes 8 are provided through the side of the protective cover 4. A fan 7 is installed at the air inlet of the dust collection box 6, and the end of the gas pipe 8 away from the protective cover 4 is connected to the fan 7. An exhaust port 12 is opened on the side wall of the dust collection box 6. The dust collection box 6 is equipped with a dust collection component for collecting alumina particles generated during casting.

[0032] Aluminum material is smelted in furnace 1, and then the valve of transport pipe 3 is opened to introduce the molten aluminum material into molding mold 5. During this process, under high temperature, the molten aluminum material reacts with oxygen in the air to generate alumina particles, which are dispersed in the air, forming irritating dust and smoke, which can easily cause acute respiratory inflammation in workers. Long-term inhalation can also lead to pneumoconiosis in workers. The fan 7 is started, and the fan 7 sucks the alumina dust particles generated below the protective cover 4 into the dust collection box 6 through the air pipe 8 to prevent them from being dispersed in the air and affecting the safety of employees. The alumina particles sucked into the dust collection box 6 are attached to the dust collection bag 31 by the dust collection bag 31. The gas with alumina particles removed is discharged from the exhaust port 12. The exhaust port 12 can be connected to other air purification equipment to purify other substances in the gas that are harmful to the human body or the environment, so as to meet the emission standards.

[0033] In one embodiment, the dust collection assembly includes a motor 16 and a belt 19. The top and bottom walls of the dust collection box 6 are connected to several pulleys 18 via rotating shafts. Protective shells 9 are installed on the upper and lower surfaces of the dust collection box 6. The motor 16 is installed on the protective shells 9. The output end of the motor 16 is connected to the pulleys 18. Several pulleys 18 cooperate with the belt 19. Several fixing frames 24 are installed around the belt 19. The fixing frames 24 are fixedly connected to connecting blocks 25. The connecting blocks 25 are rotatably connected to friction wheels 26. Friction guide rails 20 are installed on the upper and lower surfaces of the dust collection box 6. The friction wheels 26 abut against the friction guide rails 20. A filter bag structure is provided below the friction wheels 26.

[0034] After the gas is introduced into the dust collector 6, the motor 16 is started, causing the motor 16 to intermittently drive the pulley 18 to rotate. The pulley 18 intermittently drives the belt 19 to rotate, and the belt 19 drives several friction wheels 26 to rotate. During the rotation of the friction wheels 26, they rotate in conjunction with the friction guide rail 20. The rotation of the friction wheels 26 drives the active rotor 27 to rotate. Under the action of magnetic force, the active rotor 27 drives the driven rotor 28 to both revolve along the movement trajectory of the belt 19 and rotate on its own axis. The driven rotor 28 drives the entire bag structure to rotate, allowing each dust bag 31 to approach the air inlet of the dust collector 6. With the rotation of the dust bag 31, every part of the periphery of the dust bag 31 can face the air inlet, so that all the dust bags 31 and their periphery can be evenly attached with alumina particles, improving the collection efficiency and effect of alumina particles.

[0035] In one embodiment, the bag structure includes an active rotor 27, a driven rotor 28, and an outer frame 30. The active rotor 27 is fixedly connected to the lower surface of the friction wheel 26. An inner frame 29 is slidably disposed inside the outer frame 30. A dust collection bag 31 is held between the outer frame 30 and the inner frame 29. The outer frame 30 and the inner frame 29 are fixedly connected by bolts. The driven rotor 28 is fixedly connected to both the inner frame 29 and the outer frame 30. The driven rotor 28 is magnetically coupled to the active rotor 27.

[0036] The dust bag 31 can be removed and replaced by unscrewing the bolts connecting the outer frame 30 and the inner frame 29.

[0037] In one embodiment, guide rails 17 are fixedly connected to both the bottom wall and the top wall of the dust collector 6, and the driven rotor 28 is located within the guide rails 17. The guide rails 17 can guide the driven rotor 28 and prevent it from deviating.

[0038] In one embodiment, an air compressor 10 is installed on the upper surface of the dust collector 6, and a blow pipe 32 is provided through the top wall of the dust collector 6. One end of the blow pipe 32 is connected to the air compressor 10, and the blow pipe 32 is equipped with an electromagnetic pulse valve. The blow pipe 32 is located above the movement path of the bag structure.

[0039] The controller activates the electromagnetic pulse valve on the air compressor 10 and the blow pipe 32. The pulse valve opens instantly, and compressed air is sprayed through the blow pipe 32 onto the top of the dust collection bag 31. The high-speed airflow causes the dust collection bag 31 to expand and vibrate instantly, and the dust layer peels off from the surface of the dust collection bag 31 and falls with gravity.

[0040] In one embodiment, a baffle 15 is fixedly connected to the inner wall of the dust collection box 6. The baffle 15 can prevent the incoming air containing alumina particles from affecting the self-cleaning of the dust collection bag 31.

[0041] In one embodiment, a fixed pressure plate 34 is fixedly connected to the upper surface of the dust collector 6. Several fixed frames 24 located above the dust collector 6 are equipped with infrared transmitters 22. An infrared receiver 21 is installed inside the protective shell 9 located above the dust collector 6. The infrared receiver 21 is located above the movement trajectory of the infrared transmitter 22. A pressing block slot is opened inside the infrared transmitter 22. A tactile switch is provided in the pressing block slot. A spring is provided between the pressing block 23 and the inner wall of the pressing block slot. The pressing block 23 abuts against the fixed pressure plate 34 and the pressing block 23 abuts against the tactile switch. The infrared receiver 21 is electrically connected to the controller. The air compressor 10 is electrically connected to the controller.

[0042] Whenever a dust collection bag 31 is located below the blow pipe 32, the infrared transmitter 22 and the infrared receiver 21 are positioned opposite each other. At this time, the fixed pressure plate 34 lifts the pressing block 23 inside the infrared transmitter 22, which contacts the tactile switch inside the infrared transmitter 22. The infrared transmitter 22 emits infrared rays, and the infrared receiver 21 receives the infrared rays and transmits the signal to the controller.

[0043] In one embodiment, the lower surface of the pressing block 23 is provided with ball bearings to reduce wear on the pressing block 23.

[0044] In one embodiment, a discharge box 11 is provided on the lower surface of the dust collector 6, a dust collection electrode plate 13 is installed in the dust collector 6, a corona electrode plate 14 is installed on the side wall of the baffle 15, the dust collection electrode plate 13 and the corona electrode plate 14 are positioned opposite each other, the discharge box 11 is located below the dust collection electrode plate 13, a valve is provided at the discharge port of the discharge box 11, the dust collection electrode plate 13 is connected to the positive terminal of the electrode plate power supply, the corona electrode plate 14 is connected to the negative terminal of the electrode plate power supply, and the electrode plate power supply is electrically connected to the controller.

[0045] As alumina dust falls with gravity, the controller connects the dust collecting plate 13 and the corona plate 14 to the positive and negative terminals of the plate power supply. The high-voltage power supply device applies a negative high voltage to the corona plate 14, causing corona discharge around the corona plate 14. Gas molecules are ionized into free electrons and positive ions, and an "ion cloud" is formed in the electric field region to prepare for the dust to be charged. When alumina dust particles pass through the "ion cloud", free electrons attach to the surface of alumina dust through collision and diffusion, making the alumina dust particles negatively charged. Under the action of the electric field force, the negatively charged dust particles migrate towards the dust collecting plate 13 and are finally adsorbed on the surface of the dust collecting plate 13. When the motor 16 continues to drive the bag structure to rotate intermittently, the infrared transmitter 22 leaves the position of the fixed pressure plate 34, the pressing block 23 is reset under the action of the spring, the infrared receiver 21 no longer transmits signals to the controller, the power supply of the electrode plate, the electromagnetic pulse valve, and the air compressor 10 are all disconnected, and the alumina dust attached to the dust collection electrode plate 13 falls into the discharge box 11, realizing the cleaning of the bag structure at the same time during the rotation of the bag structure. The dust collection bag 31 can be self-cleaned without stopping the machine, which is more efficient and convenient.

[0046] In one embodiment, a cleaner 33 is provided on the inner wall of the dust collection box 6 to scrape off the alumina particles from the surface of the dust collection plate 13. The cleaner 33 mainly uses a screw to drive a cleaning rod to move up and down, scraping the alumina from the surface of the dust collection plate 13 into the discharge box 11.

[0047] The above embodiments disclose a gas safety protection device for aluminum casting production, the specific working principle and process of which are as follows: S1: Aluminum material is smelted in smelting furnace 1, and then the valve of transport pipe 3 is opened to introduce the molten aluminum material into molding mold 5. During this process, under high temperature, the molten aluminum material reacts with oxygen in the air to generate aluminum oxide particles, which are dispersed in the air to form irritating dust and smoke, which can easily cause acute respiratory inflammation in workers; long-term inhalation can also lead to pneumoconiosis in workers.

[0048] S2: In order to protect employees and avoid this situation, start the fan 7. The fan 7 sucks the alumina dust particles generated below the protective cover 4 into the dust collection box 6 through the air pipe 8 to prevent them from floating in the air and affecting the safety of employees. S3: Alumina particles sucked into the dust collection box 6 are attached to the dust collection bag 31 under the action of the dust collection bag 31. The gas with alumina particles removed is discharged from the exhaust port 12. The exhaust port 12 can be connected to other air purification equipment to purify other substances in the gas that are harmful to the human body or the environment, so as to meet the emission standards. S4: After the gas is introduced into the dust collector 6, the motor 16 is started, and the motor 16 intermittently drives the pulley 18 to rotate. The pulley 18 intermittently drives the belt 19 to rotate. The belt 19 drives several friction wheels 26 to rotate. During the rotation of the friction wheels 26, they rotate in conjunction with the friction guide rail 20. The rotation of the friction wheels 26 drives the active rotor 27 to rotate. Under the action of magnetic force, the active rotor 27 drives the driven rotor 28 to both revolve along the movement trajectory of the belt 19 and rotate on its own axis. The driven rotor 28 drives the entire bag structure to rotate, so that each dust bag 31 can approach the air inlet of the dust collector 6. And with the rotation of the dust bag 31, every part of the periphery of the dust bag 31 can face the air inlet, so that all the dust bags 31 and their periphery can be evenly attached with alumina particles, improving the collection efficiency and effect of alumina particles. S5: Whenever a dust bag 31 is located below the blowpipe 32, the infrared transmitter 22 and the infrared receiver 21 are positioned opposite each other. At this time, the fixed pressure plate 34 lifts the pressing block 23 inside the infrared transmitter 22, which contacts the tactile switch inside the infrared transmitter 22. The infrared transmitter 22 emits infrared rays. After the infrared receiver 21 receives the infrared rays, it transmits a signal to the controller. The controller controls the air compressor 10 and the electromagnetic pulse valve on the blowpipe 32 to start. The pulse valve opens instantly, and compressed air is sprayed through the blowpipe 32 onto the top of the dust bag 31. The high-speed airflow causes the dust bag 31 to expand and vibrate instantly, and the dust layer peels off from the surface of the dust bag 31 and falls with gravity. As alumina dust falls with gravity, the controller connects the dust collecting plate 13 and the corona plate 14 to the positive and negative terminals of the plate power supply. The high-voltage power supply device applies a negative high voltage to the corona plate 14, causing corona discharge around the corona plate 14. Gas molecules are ionized into free electrons and positive ions, and an "ion cloud" is formed in the electric field region to prepare for the dust to be charged. When alumina dust particles pass through the "ion cloud", free electrons attach to the surface of alumina dust through collision and diffusion, making the alumina dust particles negatively charged. Under the action of the electric field force, the negatively charged dust particles migrate towards the dust collecting plate 13 and are finally adsorbed on the surface of the dust collecting plate 13. S6: When the motor 16 continues to drive the bag structure to rotate intermittently, the infrared transmitter 22 leaves the position of the fixed pressure plate 34, the pressing block 23 is reset under the action of the spring, the infrared receiver 21 no longer transmits signals to the controller, the plate power supply, the electromagnetic pulse valve, and the air compressor 10 are all disconnected, and the alumina dust attached to the dust collection plate 13 falls into the discharge box 11, realizing the cleaning of the bag structure at the same time during the rotation of the bag structure. The dust collection bag 31 can be self-cleaned without stopping the machine, which is more efficient and convenient.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gas safety protection device for aluminum casting production, characterized in that, The furnace includes a smelting furnace (1), a furnace frame (2), a protective cover (4), and a dust collector (6). The furnace frame (2) is equipped with the smelting furnace (1). The protective cover (4) is installed on the furnace frame (2) via a bracket. A transport pipe (3) is provided on the side wall of the smelting furnace (1). A forming mold (5) is placed below the protective cover (4). The transport pipe (3) passes through the protective cover (4). Two air pipes (8) are provided through the side of the protective cover (4). A fan (7) is installed at the air inlet of the dust collector (6). The end of the air pipe (8) away from the protective cover (4) is connected to the fan (7). An exhaust port (12) is opened on the side wall of the dust collector (6). The dust collection box (6) is equipped with a dust collection component for collecting alumina particles generated by casting.

2. The gas safety protection device for aluminum casting production according to claim 1, characterized in that, The dust collection assembly includes a motor (16) and a belt (19). The top and bottom walls of the dust collection box (6) are connected to several pulleys (18) via a rotating shaft. The upper and lower surfaces of the dust collection box (6) are equipped with protective shells (9). The motor (16) is installed on the protective shell (9). The output end of the motor (16) is connected to the pulleys (18). Several pulleys (18) cooperate with the belt (19). Several fixing frames (24) are installed around the belt (19). The fixing frames (24) are fixedly connected to connecting blocks (25). The connecting blocks (25) are rotatably connected to friction wheels (26). Friction guide rails (20) are installed on the upper and lower surfaces of the dust collection box (6). The friction wheels (26) abut against the friction guide rails (20). A cloth bag structure is provided below the friction wheels (26).

3. The gas safety protection device for aluminum casting production according to claim 2, characterized in that, The bag structure includes an active rotor (27), a driven rotor (28), and an outer frame (30). The active rotor (27) is fixedly connected to the lower surface of the friction wheel (26). An inner frame (29) is slidably arranged inside the outer frame (30). A dust collection bag (31) is held between the outer frame (30) and the inner frame (29). The outer frame (30) and the inner frame (29) are fixed by bolts. The driven rotor (28) is fixedly connected to both the inner frame (29) and the outer frame (30). The driven rotor (28) is magnetically coupled to the active rotor (27).

4. A gas safety protection device for aluminum casting production according to claim 3, characterized in that, The bottom wall and top wall of the dust collector (6) are both fixedly connected to guide rails (17), and the driven rotor (28) is located inside the guide rails (17).

5. A gas safety protection device for aluminum casting production according to claim 2, characterized in that, An air compressor (10) is installed on the upper surface of the dust collector (6). A blow pipe (32) is provided through the top wall of the dust collector (6). One end of the blow pipe (32) is connected to the air compressor (10). An electromagnetic pulse valve is provided on the blow pipe (32). The blow pipe (32) is located above the movement path of the bag structure.

6. A gas safety protection device for aluminum casting production according to claim 1, characterized in that, A baffle (15) is fixedly connected to the inner wall of the dust collection box (6).

7. A gas safety protection device for aluminum casting production according to claim 5, characterized in that, A fixed pressure plate (34) is fixedly connected to the upper surface of the dust collector (6). Several fixed frames (24) located above the dust collector (6) are equipped with infrared transmitters (22). An infrared receiver (21) is installed inside the protective shell (9) located above the dust collector (6). The infrared receiver (21) is located above the movement trajectory of the infrared transmitter (22). A pressing block slot is opened inside the infrared transmitter (22). A tactile switch is provided in the pressing block slot. A spring is provided between the pressing block (23) and the inner wall of the pressing block slot. The pressing block (23) abuts against the fixed pressure plate (34). The pressing block (23) abuts against the tactile switch. The infrared receiver (21) is electrically connected to the controller. The air compressor (10) is electrically connected to the controller.

8. A gas safety protection device for aluminum casting production according to claim 7, characterized in that, The lower surface of the pressing block (23) is provided with ball bearings.

9. A gas safety protection device for aluminum casting production according to claim 6, characterized in that, The dust collector (6) has a discharge box (11) on its lower surface. The dust collector (6) is equipped with a dust collection plate (13). The side wall of the baffle (15) is equipped with a corona electrode (14). The dust collection plate (13) and the corona electrode (14) are positioned opposite each other. The discharge box (11) is located below the dust collection plate (13). A valve is provided at the discharge port of the discharge box (11). The dust collection plate (13) is connected to the positive terminal of the electrode power supply, and the corona electrode (14) is connected to the negative terminal of the electrode power supply. The electrode power supply is electrically connected to the controller.

10. A gas safety protection device for aluminum casting production according to claim 9, characterized in that, The inner wall of the dust collection box (6) is equipped with a cleaner (33) for scraping off the alumina particles on the surface of the dust collection plate (13).

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