A foundry dust collecting and cleaning apparatus

Abstract

The utility model relates to air purification, specifically disclose a kind of foundry workshop dust collection and purification equipment, including vertically arranged negative pressure tank, with the dust absorption pipe of negative pressure tank side wall intercommunication, with the collecting tank of negative pressure tank lower end intercommunication, filter tube is vertically arranged in negative pressure tank and both ends are closed, first negative pressure pipe is passed through negative pressure tank and with filter tube inside intercommunication, with the second negative pressure pipe of negative pressure tank inside intercommunication, and the air blowing pipe that is vertically arranged and simultaneously with negative pressure tank upper end and filter tube upper end sliding connection;Air blowing pipe lower end side wall is equipped with multiple air blowing holes, first negative pressure pipe and second negative pressure pipe are simultaneously connected with negative pressure machine.The foundry workshop dust collection and purification equipment of the utility model, it can efficiently carry out self-cleaning, reduce the period of shutdown maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of air purification, and more specifically, to a dust collection and purification device for a foundry workshop. Background Technology

[0002] In the daily operation of a foundry, pollutants such as metal powder and molding sand particles are inevitably generated. These pollutants are dispersed freely in the air, posing a threat to the workshop environment and the health of personnel. Therefore, using air purification equipment to collect and purify dust has become a key measure to ensure air quality in the workshop.

[0003] However, the powder particles generated in foundries are characterized by their large particle size, high concentration, and large quantity. Conventional filtration equipment shows its limitations in such a unique dusty environment, easily becoming clogged. Once clogged, the filter needs to be replaced or cleaned more frequently. During replacement or cleaning, the equipment must be shut down, which not only wastes time and manpower but also severely impacts air purification efficiency, causing a sharp decline in air quality within the workshop during this period, failing to meet the workshop's stringent air quality requirements. To solve this problem, designing an air purification device with higher cleaning efficiency is urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a dust collection and purification device for foundry workshops, which can efficiently perform self-cleaning and reduce downtime maintenance cycles.

[0005] This utility model is achieved through the following technical solution: The dust collection and purification equipment for the foundry workshop of this utility model includes a vertically arranged negative pressure tank, a dust suction pipe communicating with the side wall of the negative pressure tank, a collection tank communicating with the lower end of the negative pressure tank, a filter pipe vertically arranged in the negative pressure tank and closed at both ends, a first negative pressure pipe passing through the negative pressure tank and communicating with the inside of the filter pipe, a second negative pressure pipe communicating with the inside of the negative pressure tank, and a vertically arranged air blowing pipe that is slidably connected to the upper end of the negative pressure tank and the upper end of the filter pipe; the lower side wall of the air blowing pipe is provided with multiple air blowing holes, and the first negative pressure pipe and the second negative pressure pipe are simultaneously connected to a negative pressure machine.

[0006] Furthermore, the first negative pressure pipe is equipped with a first valve, and the second negative pressure pipe is equipped with a second valve.

[0007] Furthermore, the lower end of the air blowing pipe is provided with a pair of annular baffles, one of the baffles being located directly above the other baffle. The lower end of the air blowing pipe is a closed end, and the air blowing hole is located between the pair of baffles. The outer wall of the baffle abuts against the inner wall of the filter pipe.

[0008] Furthermore, the filter tube is composed of multiple filters; the multiple filters are distributed vertically and connected end to end; the filter includes a vertically arranged cylinder, a pair of isolation rings respectively located at the upper and lower ends of the cylinder, a vent hole opened on the side wall of the cylinder, and filter cotton sleeved on the outer wall of the cylinder; the outer wall of the baffle is slidably connected to the inner wall of the cylinder, and the filter cotton is located between the pair of isolation rings.

[0009] Furthermore, the gap width between the pair of baffles is equal to the length of the cylinder.

[0010] Furthermore, the upper sidewall of the air blowing pipe is provided with a limiting ring, the upper sidewall of the air blowing pipe is provided with an air inlet, and the upper end of the air blowing pipe is provided with a hanging ring; the air inlet is located between the limiting ring and the hanging ring; the lower end of the filter pipe is provided with an isolation pipe, and the lower end of the isolation pipe is a closed end; the outer wall of the baffle is slidably connected to the inner wall of the isolation pipe; when both baffles are located in the isolation pipe, the limiting ring is attached to the upper outer wall of the negative pressure tank.

[0011] Furthermore, a cleaning tube is slidably connected to the inner wall of the suction pipe, and a push plate is threadedly connected to the inner wall of the cleaning tube near the negative pressure tank; the outer wall of the cleaning tube is attached to the inner wall of the suction pipe.

[0012] Furthermore, it also includes a detachable sealing cover on the end of the suction pipe away from the negative pressure tank, an air guide pipe, and a third valve on the air guide pipe; one end of the air guide pipe is connected to the side wall of the suction pipe away from the negative pressure tank, and the other end is connected to the inside of the filter pipe; the connection between the air guide pipe and the suction pipe is located between the sealing cover and the cleaning pipe.

[0013] Furthermore, a gate valve is provided between the negative pressure tank and the collection tank.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: The dust collection and purification equipment for a foundry workshop of this utility model generates negative pressure in the filter tube, negative pressure tank, and suction pipe through a negative pressure machine and a first negative pressure pipe (the second negative pressure pipe is closed at this time). Large dust particles from the environment are sucked into the negative pressure tank through the suction pipe. Some dust accumulates at the bottom of the negative pressure tank, while most dust adheres to the outer wall of the filter tube. After a certain period, the filter tube is cleaned. During cleaning, the first negative pressure pipe is closed, the second negative pressure pipe is opened, the suction pipe is blocked, and the negative pressure machine is started. Negative pressure is generated in the negative pressure tank through the second negative pressure pipe, and outside air is directly absorbed through the upper end of the air blowing pipe and blown into the filter tube through the air blowing hole at the lower end of the air blowing pipe. This backflushing of the filter tube blows off the dust adhering to the outer wall of the filter tube, causing the dust to fall to the lower end of the negative pressure tank and finally enter the collection tank for temporary storage. During the backflushing process, the air blowing pipe can be repeatedly raised and lowered to achieve the purpose of thoroughly backflushing the filter tube. After backflushing is complete, close the second negative pressure pipe, open the first negative pressure pipe, open the suction pipe, and close the blow-out pipe to restart the air filtration operation. This effectively reduces the difficulty of backflushing, improves its efficiency, and reduces the frequency of downtime for large particles, high concentrations of dust that are prone to clogging and require frequent cleaning. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the dust collection and purification equipment for the foundry workshop provided in this embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of the dust collection and purification equipment in the foundry workshop provided in an embodiment of this utility model;

[0017] Figure 3 A schematic diagram of the internal structure of the dust collection and purification equipment in the foundry workshop provided in this embodiment of the utility model, showing two states.

[0018] Figure 4 A schematic diagram of the internal structure of the dust collection and purification equipment in the foundry workshop provided in this embodiment of the utility model, showing the three states of the equipment.

[0019] Figure 5 This is a schematic diagram of the air blowing pipe portion provided in an embodiment of the present utility model;

[0020] Figure 6 A schematic diagram of the filter portion provided in an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the expanded structure of the filter provided in an embodiment of the present invention.

[0022] Icons: 10-Negative pressure tank, 11-Suction pipe, 12-Collection tank, 13-Filter pipe, 131-Filter, 132-Cylinder, 133-Ventilation hole, 134-Isolation ring, 135-Filter cotton, 14-First negative pressure pipe, 15-Second negative pressure pipe, 16-First valve, 17-Second valve, 18-Cleaning pipe, 19-Push plate, 110-Sealing cover, 111-Air guide pipe, 112-Third valve, 113-Insulator valve, 20-Blowing pipe, 21-Blowing hole, 22-Baffle, 23-Limiting ring, 24-Air inlet, 25-Hanging ring. Detailed Implementation

[0023] Example

[0024] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 -Appendix Figure 7As shown, the dust collection and purification equipment for the foundry workshop in this embodiment includes a vertically arranged negative pressure tank 10, a dust suction pipe 11 communicating with the side wall of the negative pressure tank 10, a collection tank 12 communicating with the lower end of the negative pressure tank 10, a filter pipe 13 vertically arranged in the negative pressure tank 10 and closed at both ends, a first negative pressure pipe 14 passing through the negative pressure tank 10 and communicating with the interior of the filter pipe 13, a second negative pressure pipe 15 communicating with the interior of the negative pressure tank 10, and a vertically arranged air blowing pipe 20 that is slidably connected to the upper end of the negative pressure tank 10 and the upper end of the filter pipe 13; the lower side wall of the air blowing pipe 20 is provided with a plurality of air blowing holes 21, and the first negative pressure pipe 14 and the second negative pressure pipe 15 are simultaneously connected to a negative pressure machine. Specifically, during use, negative pressure is generated in the filter tube 13, negative pressure tank 10, and suction pipe 11 through the negative pressure machine and the first negative pressure pipe 14 (the second negative pressure pipe 15 is closed at this time). Large dust particles in the environment are sucked into the negative pressure tank 10 through the suction pipe 11. Some dust accumulates at the bottom of the negative pressure tank 10, and most dust is adsorbed on the outer wall of the filter tube 13. After a certain period of time, the filter tube 13 is cleaned. During cleaning, the first negative pressure pipe 14 is closed, the second negative pressure pipe 15 is opened, the suction pipe 11 is blocked, and the negative pressure machine is started. Negative pressure is generated in the negative pressure tank 10 through the second negative pressure pipe 15, and air from the outside is directly absorbed through the upper end of the air blowing pipe 20 and blown into the inside of the filter tube 13 through the air blowing hole 21 at the lower end of the air blowing pipe 20. The filter tube 13 is back-blown, and the dust adhering to the outer wall of the filter tube 13 is blown off. The dust falls to the lower end of the negative pressure tank 10 and finally enters the collection tank 12 for temporary storage. During the backflushing process, the air blowing pipe 20 can be repeatedly raised and lowered to thoroughly backflush the filter pipe 13. After the backflushing is complete, close the second negative pressure pipe 15, open the first negative pressure pipe 14, open the dust suction pipe 11, and close the air blowing pipe 20 to restart the air filtration operation. This effectively reduces the difficulty of backflushing operations, improves the efficiency of backflushing operations, and reduces the frequency of purification shutdowns for large particles, high concentrations, dust that is prone to clogging, and requires frequent cleaning.

[0025] In this embodiment, the first negative pressure pipe 14 is provided with a first valve 16, and the second negative pressure pipe 15 is provided with a second valve 17. Specifically, the opening and closing of the first negative pressure pipe 14 can be controlled by the first valve 16, and the opening and closing of the second negative pressure pipe 15 can be controlled by the second valve 17. The first valve 16 and the second valve 17 can be automatic valves or manually operated.

[0026] In this embodiment, the lower outer wall of the air blowing pipe 20 is provided with a pair of annular baffles 22, with one baffle 22 positioned directly above the other. The lower end of the air blowing pipe 20 is a closed end, and the air blowing hole 21 is located between the pair of baffles 22. The outer wall of the baffle 22 abuts against the inner wall of the filter tube 13. Specifically, when the air blowing pipe 20 is used to back-blow the filter tube 13, the airflow blown from the air blowing hole 21 can be concentrated between the pair of baffles 22. This results in a higher airflow velocity between the baffles 22, providing better impact on the dust and enabling more thorough and efficient removal of dust adhering to the outer wall of the filter tube 13.

[0027] In this embodiment, the filter tube 13 is composed of multiple filters 131. These filters 131 are distributed vertically and connected end-to-end. Each filter 131 includes a vertically arranged cylindrical body 132, a pair of isolation rings 134 respectively located at the upper and lower ends of the cylindrical body 132, vent holes 133 formed on the side wall of the cylindrical body 132, and filter cotton 135 sleeved on the outer wall of the cylindrical body 132. The outer wall of the baffle 22 is slidably connected to the inner wall of the cylindrical body 132, and the filter cotton 135 is disposed between the pair of isolation rings 134. The gap width between the pair of baffles 22 is equal to the length of the cylindrical body 132. Specifically, this effectively separates the multiple filter cotton 135 in the filter tube 13 by the isolation rings 134, allowing the airflow to be better concentrated between the pair of isolation rings 134 during backflush, resulting in a greater impact on the dust on the filter cotton 135.

[0028] In this embodiment, the upper sidewall of the air blowing pipe 20 is provided with a limiting ring 23, and the upper sidewall of the air blowing pipe 20 is provided with an air inlet 24. The upper end of the air blowing pipe 20 is provided with a hanging ring 25; the air inlet 24 is located between the limiting ring 23 and the hanging ring 25; the lower end of the filter pipe 13 is provided with an isolation pipe, and the lower end of the isolation pipe is a closed end; the outer wall of the baffle 22 is slidably connected to the inner wall of the isolation pipe; when both baffles 22 are located in the isolation pipe, the limiting ring 23 is attached to the upper outer wall of the negative pressure tank 10. Specifically, by providing an isolation pipe at the lower end of the filter pipe 13, when in normal air filtration, both baffles 22 are located in the isolation pipe, thus preventing any impact on the air filtration process. The limiting ring 23 can limit the movement of the air blowing pipe 20. The air blowing pipe 20 can be hoisted via the hanging ring 25. For example, a lifting machine or electric hoist can be connected to the hanging ring 25 to drive the air blowing pipe 20 to rise and fall. Alternatively, the air blowing pipe 20 can be manually driven to rise and fall. Furthermore, a screw or bolt structure can be used to suspend the filter pipe 13 within the negative pressure tank 10.

[0029] In this embodiment, a cleaning pipe 18 is slidably connected to the inner wall of the suction pipe 11, and a push plate 19 is threadedly connected to the inner wall of the cleaning pipe 18 near the negative pressure tank 10; the outer wall of the cleaning pipe 18 is attached to the inner wall of the suction pipe 11. Specifically, when the device is in air filtration mode, the push plate 19 is not connected to the cleaning pipe 18. At this time, outside air passes through the cleaning pipe 18 and the suction pipe 11 and enters the negative pressure tank 10. When cleaning is required, the suction pipe 11 can be cleaned first. The operation process is as follows: first, turn off the negative pressure machine, then screw the push plate 19 into the cleaning pipe 18, and then turn on the negative pressure machine. The negative pressure will push the cleaning pipe 18 and the push plate 19 towards the negative pressure tank 10 (as shown in the attached figure). Figure 4 As shown, during the movement of the cleaning tube 18 in the suction tube 11, the dust on the inner wall of the suction tube 11 can be scraped into the negative pressure tank 10, thereby achieving the purpose of cleaning the suction tube 11.

[0030] In this embodiment, it also includes a detachable sealing cover 110 on the end of the suction pipe 11 away from the negative pressure tank 10, an air guide pipe 111, and a third valve 112 provided on the air guide pipe 111; one end of the air guide pipe 111 is connected to the side wall of the suction pipe 11 away from the negative pressure tank 10, and the other end is connected to the inside of the filter pipe 13; the connection between the air guide pipe 111 and the suction pipe 11 is located between the sealing cover 110 and the cleaning pipe 18. Specifically, when the sealing cover 110 is placed over the end of the suction pipe 11, the suction pipe 11 is sealed. At this time, when the cleaning pipe 18 is at the end of the suction pipe 11 near the negative pressure tank 10, the third valve 112 can be opened. Air is then drawn from inside the suction pipe 11 through the negative pressure unit, the first negative pressure pipe 14 (the second negative pressure pipe 15 is closed), and the air guide pipe 111, thereby driving the cleaning pipe 18 to move towards the end of the sealing cover 110, causing the cleaning pipe 18 to return to the end of the suction pipe 11 (as shown in the attached diagram). Figure 5 (As shown). When using the first negative pressure tube 14 to draw negative pressure, since the air guide tube 111 and the filter tube 13 are internally connected, the air pressure inside the air guide tube 111 and the filter tube 13 is the same. However, the outer wall of the filter tube 13 is covered with a large amount of dust. Therefore, the air pressure inside the filter tube 13 and the negative pressure tank 10 is significantly greater than the negative pressure in the filter tube 13 and the air guide tube 111. Therefore, the cleaning tube 18 can move toward the sealing cover 110 at this time.

[0031] In this embodiment, a gate valve 113 is provided between the negative pressure tank 10 and the collection tank 12. Specifically, when the large negative pressure machine stops running, the gate valve 113 can be opened to allow the dust at the bottom of the negative pressure tank 10 to enter the collection tank 12.

[0032] In summary, the dust collection and purification equipment for the foundry workshop in this embodiment generates negative pressure in the filter pipe 13, negative pressure tank 10, and suction pipe 11 through a negative pressure machine and the first negative pressure pipe 14 (at which time the second negative pressure pipe 15 is closed). Large dust particles in the environment are sucked into the negative pressure tank 10 through the suction pipe 11. Some dust accumulates at the bottom of the negative pressure tank 10, and most dust is adsorbed on the outer wall of the filter pipe 13. After a certain period of time, the filter pipe 13 is cleaned. During cleaning, the second negative pressure pipe 15 is closed first. Open the first negative pressure pipe 14, open the second negative pressure pipe 15, then block the suction pipe 11, start the negative pressure machine, and generate negative pressure in the negative pressure tank 10 through the second negative pressure pipe 15. Air from the outside is drawn in directly through the upper end of the air blowing pipe 20 and blown into the filter tube 13 through the air blowing hole 21 at the lower end of the air blowing pipe 20, thus backflushing the filter tube 13 and blowing off the dust adhering to its outer wall. The dust falls to the lower end of the negative pressure tank 10 and is eventually temporarily stored in the collection tank 12. During the backflushing process, the air blowing pipe 20 can be repeatedly raised and lowered to achieve thorough backflushing of the filter tube 13. After the backflushing is complete, close the second negative pressure pipe 15, open the first negative pressure pipe 14, open the suction pipe 11, and close the air blowing pipe 20 to restart the air filtration operation. This effectively reduces the difficulty of backflushing operations, improves the efficiency of backflushing operations, and reduces the cycle of stopping purification for large particles, high concentrations, dust that is prone to clogging, and requires frequent cleaning.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A foundry plant dust collection and cleaning apparatus characterized by: The utility model provides a dust collection device, which comprises a vertically arranged negative pressure tank (10), a dust suction pipe (11) in communication with the side wall of the negative pressure tank (10), a collection tank (12) in communication with the lower end of the negative pressure tank (10), a filter pipe (13) vertically arranged in the negative pressure tank (10) and having both ends closed, a first negative pressure pipe (14) passing through the negative pressure tank (10) and in communication with the inside of the filter pipe (13), a second negative pressure pipe (15) in communication with the inside of the negative pressure tank (10), and a blowing pipe (20) vertically arranged and simultaneously in sliding connection with the upper end of the negative pressure tank (10) and the upper end of the filter pipe (13). The lower end side wall of the blowing pipe (20) is provided with a plurality of blowing holes (21), and the first negative pressure pipe (14) and the second negative pressure pipe (15) are simultaneously connected with a negative pressure machine.

2. The foundry plant dust collection and cleaning apparatus of claim 1, wherein: The first negative pressure pipe (14) is provided with a first valve (16), and the second negative pressure pipe (15) is provided with a second valve (17).

3. The foundry plant dust collection and cleaning apparatus of claim 1, wherein: The lower end outer wall of the blowing pipe (20) is provided with a pair of annular baffles (22), one of the baffles (22) is arranged directly above the other baffle (22), the lower end of the blowing pipe (20) is a closed end, the blowing holes (21) are arranged between the pair of baffles (22), and the outer wall of the baffle (22) is in abutment with the inner wall of the filter pipe (13).

4. The foundry plant dust collection and cleaning apparatus of claim 3, wherein: The filter pipe (13) is composed of a plurality of filters (131); the plurality of filters (131) are distributed along the vertical direction and are sequentially connected in head-to-tail mode. The filter (131) comprises a vertically arranged cylinder (132), a pair of isolation rings (134) arranged at the upper and lower ends of the cylinder (132) respectively, air permeable holes (133) formed in the side wall of the cylinder (132), and filter cotton (135) sleeved on the outer wall of the cylinder (132). The outer wall of the baffle (22) is in sliding connection with the inner wall of the cylinder (132), and the filter cotton (135) is arranged between the pair of isolation rings (134).

5. The foundry plant dust collection and cleaning apparatus of claim 4, wherein: The gap width between the pair of baffles (22) is equal to the length of the cylinder (132).

6. The foundry plant dust collection and cleaning apparatus of claim 3, wherein: The upper end side wall of the blowing pipe (20) is provided with a limiting ring (23), the upper end side wall of the blowing pipe (20) is provided with an air inlet hole (24), the upper end of the blowing pipe (20) is provided with a hanging ring (25), and the air inlet hole (24) is arranged between the limiting ring (23) and the hanging ring (25). The lower end of the filter pipe (13) is provided with an isolation pipe, the lower end of the isolation pipe is a closed end, and the outer wall of the baffle (22) is in sealing sliding connection with the inner wall of the isolation pipe. When the pair of baffles (22) are both arranged in the isolation pipe, the limiting ring (23) is attached to the outer wall of the upper end of the negative pressure tank (10).

7. The foundry plant dust collection and cleaning apparatus of claim 1 wherein: The inner wall of the cleaning pipe (18) is in sliding connection with a push plate (19) which is threadedly connected to the inner wall of one end of the cleaning pipe (18) close to the negative pressure tank (10), and the outer wall of the cleaning pipe (18) is attached to the inner wall of the dust suction pipe (11).

8. The foundry plant dust collection and cleaning apparatus of claim 7, wherein: Also included is a detachable cover provided on the dust suction pipe (11) at the end of the end portion away from the negative pressure tank (10), a gas guide pipe (111), and a third valve (112) provided on the gas guide pipe (111); One end of the gas guide pipe (111) is in communication with the side wall of the dust suction pipe (11) away from the negative pressure tank (10), and the other end is in communication with the inside of the filter pipe (13); the connection between the gas guide pipe (111) and the dust suction pipe (11) is provided between the sealing cover (110) and the cleaning pipe (18).

9. The foundry plant dust collection and cleaning apparatus of claim 1 wherein: A plug valve (113) is provided between the negative pressure tank (10) and the collection tank (12).

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