A kind of waste gas collection device for coated sand

Abstract

The present application discloses a coated sand waste gas collection device, which belongs to the field of waste gas treatment technology. The key points of its technical solution are that it includes a treatment box, a collection component and a filter screen for collecting waste gas, the collection component is connected to the treatment box, the treatment box is connected to an air outlet pipe, the filter screen is arranged in the treatment box, the filter screen separates the treatment box into a collection chamber and an air outlet chamber, the collection component is connected to the collection chamber, and the air outlet pipe is connected to the air outlet chamber; the filter screen is connected to a cleaning component for cleaning the filter screen, the cleaning component includes a cylinder, a mounting frame, a rotating shaft and a cleaning member, the cylinder is connected to the outer wall of the treatment box, the driving shaft of the cylinder extends into the treatment box, the mounting frame, the rotating shaft and the cleaning member are all arranged in the treatment box, the mounting frame is connected to the driving shaft of the cylinder, the rotating shaft is connected to the mounting frame, the cleaning member is sleeved on the rotating shaft and connected to the rotating shaft, and the cleaning member abuts against the filter screen, so as to achieve the effect of improving work efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a device for collecting waste gas from coated sand. Background Art

[0002] At present, coated sand is a kind of sand that uses high-quality selected natural sand as the sand base, and is coated with a resin system with special properties and the most ideal process technology. According to the technical needs of different users, it strives to achieve the most perfect combination of room temperature performance, high temperature performance, disintegration, fluidity, casting surface roughness, etc. It is widely used in automobile engines, diesel engines, hydraulic parts and other industries.

[0003] During the casting production process, resin-coated sand is used to make models, which produces waste gas. This waste gas includes smoke, organic gases with pungent odors, and volatile gases. During waste gas treatment, a filter is first used to remove larger impurities from the waste gas. However, since the coated sand reactor operates continuously, large impurities in the waste gas can accumulate on the surface of the filter, causing it to become clogged and affecting the normal operation of the coated sand reactor. Therefore, frequent cleaning is required. Conventional technology typically requires the filter to be removed for cleaning. Excessive impurities lead to frequent removal, reducing work efficiency. Utility Model Content

[0004] In order to improve work efficiency, the utility model provides a coated sand waste gas collection device.

[0005] The utility model provides a coated sand waste gas collection device adopts the following technical solutions:

[0006] The exhaust gas collecting device of coated sand comprises a treatment box, a collection assembly and a filter for collecting exhaust gas, the collection assembly is connected to the treatment box, the treatment box is connected to an exhaust pipe, the filter screen is arranged in the treatment box, the filter screen isolates the treatment box into a collection chamber and an exhaust chamber, the collection assembly is communicated with the collection chamber, and the outlet pipe is communicated with the exhaust chamber; the filter screen is connected to a cleaning assembly for cleaning the filter screen, the cleaning assembly comprises a cylinder, a mounting bracket, a rotating shaft and a cleaning member, the cylinder is connected to the outer wall of the treatment box, the driving shaft of the cylinder extends into the treatment box, the mounting bracket, the rotating shaft and the cleaning member are all arranged in the treatment box, the mounting bracket is connected to the driving shaft of the cylinder, the rotating shaft is connected to the mounting bracket, the cleaning member is sleeved on the rotating shaft and connected to the rotating shaft, and the cleaning member abuts against the filter screen.

[0007] By adopting the above technical solution, exhaust gas enters the treatment box through the collection assembly, is filtered by the filter, which removes smoke and dust from the exhaust gas, and then is discharged from the treatment box through the exhaust pipe. To reduce the possibility of filter clogging, the cylinder is activated, which drives the mounting frame to move, which in turn drives the rotating shaft, which in turn drives the cleaning element to move. The cleaning element cleans the filter during movement, reducing the need for filter maintenance or replacement and improving work efficiency.

[0008] Preferably, a movable chamber is provided in the processing box, and a through hole is provided on the processing box, the length direction of the through hole is parallel to the driving direction of the mounting frame driven by the cylinder, the through hole connects the movable chamber and the inside of the processing box, the rotating shaft is rotatably connected to the mounting frame, the first end of the rotating shaft passes through the through hole and extends into the movable chamber; a rolling assembly is provided in the movable chamber, the rolling assembly includes a rack and a gear, the rack is fixedly connected to the processing box, the length direction of the rack is parallel to the length direction of the through hole, the gear is sleeved on the rotating shaft and connected to the rotating shaft, the gear is meshed with the rack, and an anti-slip pad is provided between the cleaning member and the rotating shaft, and the anti-slip pad is connected to both the rotating shaft and the cleaning member.

[0009] By adopting this technical solution, the cleaning element moves, driving the gear. Because the gear meshes with the rack, the gear rotates during the cleaning element's rotation, which in turn drives the shaft, which in turn drives the cleaning element. This forward movement of the cleaning element reduces wear on the cleaning element, thereby reducing the need for repair or replacement and improving work efficiency. The anti-slip pad increases friction between the cleaning element and the shaft, ensuring that the shaft drives the cleaning element's rotation.

[0010] Preferably, a first slide groove and a second slide groove are provided on the inner wall of the processing box away from the through hole, the length direction of the first slide groove and the length direction of the second slide groove are both parallel to the length direction of the through hole, one end of the mounting frame extends into the first slide groove and is slidably connected to the processing box, the second end of the rotating shaft extends into the second slide groove and is slidably connected to the processing box, a hinged switch door is provided on the processing box, and the second slide groove is at least partially provided on the switch door.

[0011] By adopting this technical solution, the first chute restrains the mounting bracket during movement, while the second chute also restrains the rotating shaft during movement of the mounting bracket. Once the mounting bracket and rotating shaft are moved to the door, the door can be opened to replace or repair the cleaning components. This also allows impurities on the filter to be removed from the treatment box.

[0012] Preferably, the bottom surface of the switch door is flush with the top of the filter.

[0013] By adopting the above technical solution, when opening the switch door and cleaning impurities on the filter screen, the impurities can be easily cleaned out.

[0014] Preferably, the treatment box is connected to a spray assembly, which includes a water tank, a water pump, a delivery pipe, a branch pipe and a spray head. The water tank is arranged near the treatment box, the water pump is connected to the water tank, the inlet end of the water pump is connected to the inside of the water tank, the outlet end of the water pump is connected to the delivery pipe, a plurality of branch pipes are provided, the first end of the branch pipe is connected to the delivery pipe, the second end of the branch pipe extends into the treatment box and is connected to the spray head, the branch pipe is plugged into the treatment box, and the spray head is located in the collection chamber.

[0015] By adopting this technical solution, the water pump is activated, pumping water from the water tank and delivering it to the delivery pipe. The water in the delivery pipe is then delivered to the branch pipe and sprayed out by the spray head. The spray head sprays water mist, which adsorbs, aggregates, and settles the exhaust dust entering the treatment tank, thereby improving the treatment of exhaust dust. The water mist also cools the exhaust gas.

[0016] Preferably, an adsorption layer is provided in the air outlet chamber, the adsorption layer is fixedly connected to the processing box, the adsorption layer separates two spaces of the air outlet chamber, and the filter screen and the air outlet pipe are respectively located on both sides of the adsorption layer.

[0017] By adopting the above technical solution, the exhaust gas passing through the filter screen also passes through the adsorption layer, which adsorbs the organic gas with pungent odor in the exhaust gas, and then discharges the exhaust gas passing through the adsorption layer from the exhaust pipe.

[0018] Preferably, a first partition is provided in the air outlet chamber, the first partition is arranged between the filter and the adsorption layer, the top of the first partition is fixedly connected to the processing box, and a gap is left between the bottom of the first partition and the processing box.

[0019] By adopting the above technical solution, the exhaust gas passing through the filter is slowed down due to the blocking speed of the first partition, temporarily stored between the filter and the first partition, and then flows from the bottom of the first partition to the adsorption layer, so that the adsorption layer can completely adsorb the organic gas with pungent odor in the exhaust gas.

[0020] Preferably, a second partition is provided in the air outlet chamber, and the second partition is arranged between the first partition and the adsorption layer. The bottom of the first partition is fixedly connected to the processing box, and a gap is left between the top of the first partition and the processing box. The top surface of the second partition is higher than the bottom surface of the first partition.

[0021] By adopting the above technical solution, the second partition and the first partition cooperate to further slow down the flow rate of the exhaust gas entering the adsorption layer, making it easier for the adsorption layer to completely adsorb the organic gas with pungent odor in the exhaust gas.

[0022] Preferably, the collection assembly includes a fan and a telescopic tube, the fan is fixedly connected to the processing box, the air inlet of the fan is fixedly connected to the telescopic tube, and the air outlet of the fan is connected to the interior of the processing box.

[0023] By adopting the above technical solution, when collecting exhaust gas, the telescopic tube is placed at the exhaust gas collection point, the fan is started, and the exhaust gas enters the fan through the telescopic tube and is sent into the treatment box by the fan. The telescopic tube can collect exhaust gas at different heights.

[0024] In summary, the present invention has the following beneficial effects:

[0025] Exhaust gas enters the treatment box through the collection assembly. It is then filtered by the filter, which removes smoke and dust from the exhaust gas. The filtered gas then exits the treatment box through the exhaust pipe. To reduce the possibility of filter clogging, the cylinder is activated, which drives the mounting frame to move. The mounting frame drives the rotating shaft, which in turn drives the cleaning element to move. The cleaning element cleans the filter during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the overall structure of a coated sand waste gas collection device.

[0027] Figure 2 This is a schematic diagram of the interior of the processing box.

[0028] Figure 3 It is a structural diagram of the cleaning component.

[0029] Figure 4 yes Figure 2 Enlarged schematic diagram of part A.

[0030] Figure 5 A schematic diagram showing the structure of the first separator, the second separator and the adsorption layer.

[0031] Description of reference numerals:

[0032] 1. Processing box; 11. Exhaust pipe; 12. Active cavity; 13. Through hole; 14. First chute; 15. Second chute; 16. Open / close door; 2. Collecting assembly; 21. Fan; 22. Telescopic tube; 3. Filter; 4. Cleaning assembly; 41. Cylinder; 42. Mounting frame; 43. Rotating shaft; 44. Cleaning part; 5. Rolling assembly; 51. Rack; 52. Gear; 6. Spray assembly; 61. Water tank; 62. Water pump; 63. Delivery pipe; 64. Branch pipe; 65. Spray head; 7. First partition; 8. Second partition; 9. Adsorption layer. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings.

[0034] A coated sand waste gas collection device, referring to Figure 1 and Figure 2 , including a treatment box 1, a collecting component 2 and a filter 3. The collecting component 2 is connected to the treatment box 1, and the collecting component 2 is used to collect exhaust gas. The bottom of the treatment box 1 is connected to an exhaust pipe 11, and the exhaust pipe 11 is used to release the treated exhaust gas. The filter 3 is arranged in the treatment box 1 and fixedly connected to the treatment box 1. The filter 3 separates the treatment box 1 into a collection chamber and an exhaust chamber. The collecting component 2 is connected to the collection chamber, and the exhaust pipe 11 is connected to the exhaust chamber. The filter 3 is used to filter smoke and dust in the exhaust gas. The filter 3 is connected to a cleaning assembly 4, which includes a cylinder 41, a mounting bracket 42, a rotating shaft 43, and a cleaning member 44. The cylinder 41 is fixedly connected to the outer wall of the processing box 1, and the drive shaft of the cylinder 41 extends into the processing box 1. The mounting bracket 42, the rotating shaft 43, and the cleaning member 44 are all arranged in the processing box 1. The mounting bracket 42 is fixedly connected to the drive shaft of the cylinder 41, and the rotating shaft 43 is connected to the mounting bracket 42. The cleaning member 44 is sleeved on and connected to the rotating shaft 43, and the cleaning member 44 abuts against the filter 3. When the cylinder 41 is started, the cylinder 41 drives the mounting bracket 42 to move, the mounting bracket 42 drives the rotating shaft 43 to move, and the rotating shaft 43 drives the cleaning member 44 to move. The cleaning member 44 cleans the filter 3, reducing the possibility of clogging the filter 3 even when there are too many impurities, further reducing the possibility of repairing and replacing the filter 3, and improving work efficiency.

[0035] Reference Figure 1 The exhaust pipe 11 and the collection assembly 2 are located on two parallel side walls of the treatment box 1. The collection assembly 2 includes a fan 21 and a telescopic tube 22. The fan 21 is fixedly connected to the outer wall of the treatment box 1. The inlet end of the fan 21 is fixedly connected to the telescopic tube 22, and the outlet end of the fan 21 is connected to the interior of the treatment box 1.

[0036] When collecting waste gas, the fan 21 is started, the telescopic tube 22 is placed at the waste gas collection location, and the waste gas is sent into the processing box 1 through the telescopic tube 22. The telescopic tube 22 can collect waste gas at different heights.

[0037] Reference Figure 2 , the filter screen 3 is placed horizontally. A hinged switch door 16 is provided on the processing box 1. The bottom surface of the switch door 16 is flush with the top surface of the filter screen 3. Opening the switch door 16 facilitates cleaning out impurities on the filter screen 3.

[0038] Reference Figure 2 A first chute 14 and a second chute 15 are formed on the inner wall of the processing box 1, away from the through hole 13. The length directions of the first chute 14 and the second chute 15 are both parallel to the length direction of the through hole 13. The first chute 14 is located above the second chute 15. The first chute 14 is at least partially disposed on the switch door 16. The second chute 15 is at least partially disposed on the switch door 16.

[0039] Reference Figure 2 and Figure 3 The mounting frame 42 includes a horizontal portion and a vertical portion. The first end of the horizontal portion is fixedly connected to the top of the vertical portion, and the second end of the horizontal portion extends into the first slide groove 14 and is slidably connected to the processing box 1. The first end of the rotating shaft 43 passes through the vertical portion and is rotatably connected to the vertical portion. The second end of the rotating shaft 43 extends into the second slide groove 15 and is slidably connected to the processing box 1. The cleaning member 44 adopts a cleaning sponge roller or a cleaning brush roller. An anti-slip pad is provided between the cleaning member 44 and the rotating shaft 43. The anti-slip pad is fixedly connected to the circumferential wall of the rotating shaft 43. The outer wall of the anti-slip pad matches the inner wall of the cleaning member 44, and the outer wall of the anti-slip pad abuts against the inner wall of the cleaning member 44.

[0040] During the movement of the mounting frame 42, the first chute 14 limits the mounting frame 42. At the same time, during the movement of the rotating shaft 43 driven by the mounting frame 42, the second chute 15 limits the rotating shaft 43. When the mounting frame 42 and the rotating shaft 43 are moved to the door 16, the door 16 is opened and the cleaning member 44 can be replaced or repaired.

[0041] Reference Figure 2 and Figure 4 The processing box 1 is provided with an active cavity 12 and a through hole 13, and the through hole 13 communicates with the active cavity 12 and the interior of the processing box 1. The length direction of the through hole 13 is parallel to the driving direction of the cylinder 41 driving the mounting frame 42.

[0042] Reference Figure 3 and Figure 4 A rolling assembly 5 is disposed within the active chamber 12. The rolling assembly 5 comprises a rack 51 and a gear 52. The rack 51 is fixedly connected to the processing box 1, with its length parallel to the length of the through-hole 13. The first end of the rotating shaft 43 passes through the through-hole 13 and extends into the active chamber 12. The gear 52 is sleeved on and fixedly connected to the rotating shaft 43.

[0043] The cleaning member 44 drives the gear 52 to move during the movement. Since the gear 52 is engaged with the rack 51, the gear 52 rotates during the rotation of the cleaning member 44. The gear 52 drives the rotating shaft 43 to rotate. The rotating shaft 43 drives the cleaning member 44 to rotate. The cleaning member 44 rotates forward, reducing the possibility of wear of the cleaning member 44, thereby reducing the number of times the cleaning member 44 needs to be repaired or replaced, and improving work efficiency.

[0044] Reference Figure 1 and Figure 2 The treatment box 1 is connected to a spray assembly 6, which includes a water tank 61, a water pump 62, a delivery pipe 63, a branch pipe 64 and a spray head 65. The water tank 61 is arranged near the treatment box 1, and the water pump 62 is fixedly connected to the top of the water tank 61. The inlet end of the water pump 62 is connected to the inside of the water tank 61, and the outlet end of the water pump 62 is fixedly connected to the delivery pipe 63. There are three branch pipes 64, the first end of the branch pipe 64 is connected to the delivery pipe 63, and the second end of the branch pipe 64 extends into the treatment box 1 and is fixedly connected to the spray head 65. The branch pipe 64 is plugged into the treatment box 1. The spray head 65 is located in the collection chamber.

[0045] Water pump 62 is activated, pumping water from water tank 61 and delivering it to delivery pipe 63. The water in delivery pipe 63 is then delivered to branch pipe 64 and sprayed out by spray nozzle 65. Spray nozzle 65 sprays water mist, which attracts, aggregates, and settles the dust in the exhaust gas entering treatment box 1, thereby improving the treatment of dust in the exhaust gas. The water mist also cools the exhaust gas.

[0046] Reference Figure 5 The adsorption layer 9 is vertically disposed in the exhaust chamber and fixedly connected to the treatment box 1. The adsorption layer 9 is an activated carbon layer. The number of adsorption layers 9 can be adjusted according to actual needs. In this embodiment, one adsorption layer 9 is provided. The adsorption layer 9 separates the two spaces of the exhaust chamber. The filter 3 and the exhaust pipe 11 are respectively located on both sides of the adsorption layer 9. The adsorption layer 9 processes odorous organic matter in the exhaust gas.

[0047] Reference Figure 5 The placement chamber is provided with a first partition 7 and a second partition 8. The first partition 7 is vertically arranged between the filter screen 3 and the adsorption layer 9, and the second partition 8 is vertically located between the first partition 7 and the adsorption layer 9. The first partition 7 and the second partition 8 are arranged alternately. The top of the first partition 7 is fixedly connected to the treatment box 1, and a gap is left between the bottom and the treatment box 1. The top of the second partition 8 is fixedly connected to the treatment box 1 with a gap left between the top and the treatment box 1. The top surface of the second partition 8 is higher than the bottom surface of the first partition 7.

[0048] The operating principle of this application is as follows: Telescopic tube 22 is placed where exhaust gas is to be collected. Fan 21 is started, and exhaust gas enters fan 21 through telescopic tube 22 and is then transported into treatment box 1. Water pump 62 is started, pumping water from water tank 61 and delivering it to delivery pipe 63. The water in delivery pipe 63 is then delivered to branch pipe 64, where it is sprayed out as a water mist by spray nozzle 65. The water mist adsorbs, aggregates, and settles the smoke and dust entering treatment box 1. The water mist also cools the exhaust gas.

[0049] When cylinder 41 is activated, it moves mounting bracket 42, which in turn moves shaft 43, which in turn moves cleaning member 44. Gear 52 and rack 51 cooperate to rotate shaft 43, which in turn rotates cleaning member 44. During this movement, cleaning member 44 cleans filter 3, reducing the likelihood of filter 3 becoming clogged. This reduces the need for filter 3 repair or replacement, thereby improving work efficiency.

[0050] The exhaust gas passing through the filter 3 is temporarily stored between the first partition 7 and the filter 3. The exhaust gas is decelerated and passes through the gap between the first partition 7 and the treatment box 1, and then passes through the gap between the second partition 8 and the treatment box 1. The exhaust gas passes through the adsorption layer 9. The adsorption layer 9 adsorbs the organic gas with a pungent odor in the exhaust gas, and finally the treated exhaust gas is discharged from the outlet pipe 11.

[0051] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A coated sand waste gas collection device, characterized in that: The invention comprises a treatment box (1), a collection component (2) for collecting waste gas, and a filter (3), wherein the collection component (2) is connected to the treatment box (1), the treatment box (1) is connected to an air outlet pipe (11), the filter (3) is arranged in the treatment box (1), the filter (3) separates the treatment box (1) into a collection chamber and an air outlet chamber, the collection component (2) is connected to the collection chamber, and the air outlet pipe (11) is connected to the air outlet chamber; The filter (3) is connected to a cleaning assembly (4) for cleaning the filter (3). The cleaning assembly (4) comprises a cylinder (41), a mounting frame (42), a rotating shaft (43) and a cleaning member (44). The cylinder (41) is connected to the outer wall of the processing box (1). The driving shaft of the cylinder (41) extends into the processing box (1). The mounting frame (42), the rotating shaft (43) and the cleaning member (44) are all arranged in the processing box (1). The mounting frame (42) is connected to the driving shaft of the cylinder (41). The rotating shaft (43) is connected to the mounting frame (42). The cleaning member (44) is sleeved on the rotating shaft (43) and connected to the rotating shaft (43). The cleaning member (44) abuts against the filter (3).

2. A coated sand waste gas collection device according to claim 1, characterized in that: An active chamber (12) is provided in the processing box (1), and a through hole (13) is provided on the processing box (1). The length direction of the through hole (13) is parallel to the driving direction of the cylinder (41) driving the mounting frame (42). The through hole (13) communicates with the active chamber (12) and the interior of the processing box (1). The rotating shaft (43) is rotatably connected to the mounting frame (42). The first end of the rotating shaft (43) passes through the through hole (13) and extends into the active chamber (12). A rolling assembly (5) is arranged in the movable chamber (12), and the rolling assembly (5) comprises a rack (51) and a gear (52). The rack (51) is fixedly connected to the processing box (1), and the length direction of the rack (51) is parallel to the length direction of the through hole (13). The gear (52) is sleeved on the rotating shaft (43) and connected to the rotating shaft (43). The gear (52) is meshed with the rack (51). An anti-skid pad is arranged between the cleaning member (44) and the rotating shaft (43), and the anti-skid pad is connected to both the rotating shaft (43) and the cleaning member (44).

3. A coated sand waste gas collection device according to claim 2, characterized in that: A first slide groove (14) and a second slide groove (15) are provided on the inner wall of the processing box (1) away from the through hole (13); the length direction of the first slide groove (14) and the length direction of the second slide groove (15) are both parallel to the length direction of the through hole (13); one end of the mounting frame (42) extends into the first slide groove (14) and is slidably connected to the processing box (1); the second end of the rotating shaft (43) extends into the second slide groove (15) and is slidably connected to the processing box (1); a hinged switch door (16) is provided on the processing box (1); and the second slide groove (15) is at least partially provided on the switch door (16).

4. A coated sand waste gas collection device according to claim 3, characterized in that: The bottom surface of the switch door (16) is flush with the top of the filter screen (3).

5. A coated sand waste gas collection device according to any one of claims 1 to 4, characterized in that: The treatment box (1) is connected to a spray assembly (6), and the spray assembly (6) comprises a water tank (61), a water pump (62), a delivery pipe (63), a branch pipe (64) and a spray head (65). The water tank (61) is arranged near the treatment box (1), the water pump (62) is connected to the water tank (61), the inlet end of the water pump (62) is connected to the inside of the water tank (61), the outlet end of the water pump (62) is connected to the delivery pipe (63), a plurality of branch pipes (64) are arranged, the first end of the branch pipe (64) is connected to the delivery pipe (63), the second end of the branch pipe (64) extends into the treatment box (1) and is connected to the spray head (65), the branch pipe (64) is plugged into the treatment box (1), and the spray head (65) is located in the collection chamber.

6. A coated sand waste gas collection device according to any one of claims 1 to 4, characterized in that: An adsorption layer (9) is arranged in the air outlet chamber, and the adsorption layer (9) is fixedly connected to the processing box (1). The adsorption layer (9) separates two spaces of the air outlet chamber into an isolation layer, and the filter screen (3) and the air outlet pipe (11) are respectively located on both sides of the adsorption layer (9).

7. The coated sand waste gas collection device according to claim 6, characterized in that: A first partition (7) is provided in the air outlet chamber, and the first partition (7) is arranged between the filter (3) and the adsorption layer (9). The top of the first partition (7) is fixedly connected to the processing box (1), and a gap is left between the bottom of the first partition (7) and the processing box (1).

8. The coated sand waste gas collection device according to claim 7, characterized in that: A second partition (8) is provided in the air outlet chamber, and the second partition (8) is arranged between the first partition (7) and the adsorption layer (9). The bottom of the first partition (7) is fixedly connected to the processing box (1), and a gap is left between the top of the first partition (7) and the processing box (1). The top surface of the second partition (8) is higher than the bottom surface of the first partition (7).

9. The coated sand waste gas collection device according to claim 1, characterized in that: The collecting assembly (2) comprises a fan (21) and a telescopic tube (22); the fan (21) is fixedly connected to the processing box (1); an air inlet of the fan (21) is fixedly connected to the telescopic tube (22); and an air outlet of the fan (21) is in communication with the interior of the processing box (1).

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