Screening equipment for processing and cooling precoated sand

Abstract

The invention relates to the field of precoated sand, in particular to screening equipment for processing and cooling precoated sand, which comprises a screen drum, and a first screen plate and a second screen plate are fixedly mounted in the screen drum; and a material distributing assembly is arranged in the screen drum, the material distributing assembly is used for evenly distributing the precoated sand on the surfaces of the first screen plate and the second screen plate, the material distributing assembly comprises a material discharging barrel fixedly installed on the screen drum, and a material distributing plate and a plurality of material separating plates are arranged in an inner cavity of the screen drum. According to the precoated sand screening equipment, the precoated sand can uniformly fall into the area between the partition plates after entering the screening equipment and passing through the discharging barrel by arranging the material distributing assembly, that is, the precoated sand is uniformly distributed at all positions of the surface of the first screening plate, and the situation that the precoated sand concentratedly falls to the top end of the first screening plate and is accumulated at a certain position is avoided; and rotation of the material distributing plates can push the precoated sand with the stacking height possibly exceeding the height of the material separating plates to the area between the next material separating plates, and the precoated sand in the area formed between the material separating plates is further equally divided.

Description

Technical Field

[0001] The present invention relates to the technical field of coated sand, in particular to a screening device used for processing and cooling coated sand. Background Art

[0002] Coated sand is a type of molding sand or core sand with a solid resin film coated on the surface of the sand particles, also known as shell sand. It is widely used in the foundry industry. During the processing of coated sand, cooling and screening equipment is mainly used to reduce the temperature of the coated sand and ensure that its particle size distribution meets production requirements, and to screen out coated sand that does not meet the specifications.

[0003] In the existing traditional coated sand screening process, it is difficult for the coated sand to enter the screening equipment evenly for screening. In the actual production process, after the coated sand enters the screening equipment from the feed port, it is difficult to be evenly distributed on the screen plate. When the amount of coated sand is large, it is easy to accumulate in some areas of the screen plate, increasing the screening pressure in this area, and the screen holes are easily blocked, while the materials in other areas are sparse, and the screening capacity cannot be fully utilized, thereby greatly reducing the screening efficiency of the coated sand and affecting the entire production process of the coated sand.

[0004] Therefore, a screening device for processing and cooling coated sand is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a screening device for processing and cooling coated sand to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a screening device for processing and cooling coated sand, comprising a screen drum, wherein the screen drum is fixedly mounted with a first screen plate and a second screen plate; the screen drum is provided with a distribution assembly, wherein the distribution assembly is used to evenly distribute the coated sand on the surfaces of the first screen plate and the second screen plate, wherein the distribution assembly comprises a discharge drum fixedly mounted on the screen drum, and the inner cavity of the screen drum is provided with a distribution plate and a plurality of partition plates; the distribution plate is provided with a stirring assembly, wherein the stirring assembly is used to enhance the fluidity of the coated sand on the first screen plate and the second screen plate, thereby improving the screening efficiency of the coated sand, wherein the stirring assembly comprises a mounting plate fixedly mounted on the distribution plate, and a movable rod is slidably connected to the mounting plate; the mounting plate is provided with a discharge assembly, wherein the discharge assembly is used to discharge the coated sand that does not meet the specifications after screening outward in a concentrated manner, and the discharge assembly comprises a push box fixedly mounted on the mounting plate, and a transfer box for cooperating with the push box to discharge material outward is fixedly mounted at the bottom ends of the first screen plate and the second screen plate.

[0007] Preferably, the bottom of the inner cavity of the discharge barrel is opened in a cone shape, and a plurality of through holes are evenly opened on the bottom surface of the cone.

[0008] Preferably, a connecting platform is fixedly mounted on each of the first sieve plate and the second sieve plate, and a plurality of partition plates are fixedly connected to the connecting platform, and the plurality of partition plates evenly divide the tops of the first sieve plate and the second sieve plate into a plurality of areas.

[0009] Preferably, a motor is fixedly mounted on the bottom end of the second screen plate, a rotating shaft is fixedly connected to the output shaft of the motor, and the rotating shaft is rotatably connected to the connecting platform, and the dividing plate is fixedly connected to the rotating shaft.

[0010] Preferably, a plurality of stirring plates are fixedly connected to the movable rod, and a first spring is fixedly connected between the movable rod and the mounting plate.

[0011] Preferably, the end of the movable rod is fixedly connected to a bracket, and a roller is rotatably connected to the bracket. A corrugated ring is fixedly installed in the screen cylinder, and the inner ring of the corrugated ring is arranged in a wavy shape. The corrugated ring and the roller are used to make the movable rod slide in the mounting plate, and the corrugated ring is provided with an arc portion.

[0012] Preferably, a receiving cylinder is fixedly installed in the transfer box, and a sliding column is slidably connected in the receiving cylinder. A second spring is fixedly connected between the sliding column and the receiving cylinder, and a sealing plate is fixedly connected to the top end of the sliding column.

[0013] Preferably, a stopper is fixedly mounted on the sealing plate, a slope is provided on the pushing box, and an inclined shape matching the slope is provided on the stopper, and the stopper and the slope cooperate to allow the sealing plate to move up and down.

[0014] Preferably, a connecting cylinder is fixedly installed on the bottom end of the first screen plate, and a plurality of guide plates are fixedly connected to the connecting cylinder. The guide plates are used to guide the coated sand passing through the first screen plate to fall onto the second screen plate.

[0015] Preferably, the connecting cylinder and the guide plate are both hollow and internally interconnected, a cooling air duct is fixedly connected to the guide plate, and the cooling air duct passes through the screen cylinder, and a plurality of air outlet ducts are evenly opened on the guide plate, and the air outlet ducts are arranged in an inclined downward shape.

[0016] Beneficial effects of the present invention: 1. The present invention provides a dividing component so that the coated sand can evenly fall into the area between the partition plates after entering the screening equipment and passing through the discharge barrel, that is, the coated sand is evenly distributed on the surface of the first screen plate, avoiding the situation where the coated sand falls to the top of the first screen plate and accumulates at a certain place, and the rotation of the dividing plate can push the coated sand that may have a pile height exceeding the height of the partition plate to the area between the next partition plates, further dividing the coated sand in the area formed between the partition plates, so that the coated sand is more evenly distributed on the surface of the first screen plate.

[0017] 2. The present invention sets a stirring assembly so that the material distribution plate drives the mounting plate to rotate when it rotates, so that the stirring plate on the movable rod pushes the coated sand to disperse during the rotation of the first screen plate, enhances the fluidity of the coated sand, makes it easier for the coated sand to pass through the first screen plate, and has higher screening efficiency. In addition, with the cooperation of the roller and the corrugated ring, the stirring plate can not only push the coated sand to disperse during the rotation, but also circulate left and right on the mounting plate through the movable rod, further enhancing the fluidity of the coated sand to improve the screening efficiency, prevent accumulation and reduce the possibility of blockage.

[0018] 3. The present invention sets a discharge assembly so that when the first screen plate is screening the coated sand, the rotation of the mounting plate drives the push box to rotate on the first screen plate. The push box can collect the large-particle coated sand on the top of the first screen plate, and cooperate with the block when the push box rotates to the sealing plate, so that the sealing plate is separated from the first screen plate. The large-particle coated sand in the push box can fall downward and be discharged through the transfer box. There is no need to manually remove the large-particle coated sand. At the same time, the timely discharge of large-particle coated sand can prevent it from being excessive and blocking the first screen plate, affecting the timely passage of the coated sand that meets the requirements.

[0019] 4. The present invention guides the coated sand passing through the first screen plate by arranging a guide plate, so that it falls correspondingly between the partition plates on the second screen plate, keeping the coated sand distributed everywhere on the surface of the second screen plate, giving full play to the screening capacity, so that the coated sand can also maintain uniformity when it is on the surface of the second screen plate, and introducing cold air through the cooling air duct to discharge it from the air outlet on the guide plate, and fully contacting with the coated sand in a dispersed state that falls between the guide plates, thereby fully cooling the coated sand and making its cooling effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a cross-sectional structure of a screen drum of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a material separator plate of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 4This is a schematic diagram of the structure of a dividing plate of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the movable rod structure of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 6 This is a schematic cross-sectional view of a pusher box of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the pusher box structure of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 8 This is a schematic cross-sectional structural diagram of a first screen plate of a screening device for processing and cooling coated sand according to an embodiment of the present invention; Figure 9 This is a screening device for cooling coated sand processing according to an embodiment of the present invention. Figure 8 A in the middle is an enlarged structural diagram; Figure 10 This is a schematic diagram of the guide plate structure of a screening device for processing and cooling coated sand according to an embodiment of the present invention.

[0022] The markings in the figure are: 1. Screen cylinder; 2. First screen plate; 3. Second screen plate; 4. Discharge cylinder; 5. Dividing plate; 6. Partition plate; 7. Mounting plate; 8. Movable rod; 9. Push box; 10. Transfer box; 11. Connecting table; 12. Motor; 13. Rotating shaft; 14. Stirring plate; 15. First spring; 16. Bracket; 17. Roller; 18. Corrugated ring; 19. Arc portion; 20. Accommodating cylinder; 21. Sliding column; 22. Second spring; 23. Sealing plate; 24. Stop block; 25. Inclined surface; 26. Connecting cylinder; 27. Guide plate; 28. Cooling air duct; 29. ​​Outlet duct. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0025] like Figures 1 to 10 As shown, a specific embodiment of the present invention provides a screening device for processing and cooling coated sand, including a screen drum 1, in which a first screen plate 2 and a second screen plate 3 are fixedly installed; a material dividing assembly is provided in the screen drum 1, and the material dividing assembly is used to evenly distribute the coated sand on the surfaces of the first screen plate 2 and the second screen plate 3. By setting the material dividing assembly, the coated sand entering the screen drum 1 can be evenly distributed on the first screen plate 2 and the second screen plate 3, thereby preventing uneven feeding from causing accumulation of coated sand in some areas, and preventing the screening pressure in the accumulated areas from being too high and affecting the screening efficiency. The evenly distributed coated sand can enable the first screen plate 2 and the second screen plate 3 to fully exert their screening capacity, thereby improving the screening efficiency. The material dividing assembly includes a discharge drum 4 fixedly mounted on the screen drum 1, and a material dividing plate 5 and a plurality of material partition plates 6 are provided in the inner cavity of the screen drum 1; a stirring assembly is provided on the material dividing plate 5, and the stirring assembly is used to enhance the fluidity of the coated sand on the first screen plate 2 and the second screen plate 3, thereby improving the screening efficiency of the coated sand. The sieve 5 of the present invention is to move the sieve 5 of the present invention to the sieve 2 of the present invention, so that the sieve 5 of the present invention can move the sieve 5 of the present invention to the sieve 2 of the present invention.

[0026] like Figures 1 to 4 As shown, specifically, the bottom of the inner cavity of the discharge barrel 4 is opened in a cone shape, and a number of through holes are evenly opened on the bottom surface of the cone. The first screen plate 2 and the second screen plate 3 are fixedly installed with a connecting platform 11, and a number of partition plates 6 are fixedly connected to the connecting platform 11. The number of partition plates 6 evenly divides the top of the first screen plate 2 and the second screen plate 3 into multiple areas. During operation, the coated sand enters the interior through the top of the discharge barrel 4. Since the bottom of the inner cavity of the discharge barrel 4 is opened in a cone shape, the coated sand entering can disperse and flow around and be discharged downward through the through holes, and then fall to the top of the first screen plate 2, that is, fall between the partition plates 6. In this process, since the coated sand is dispersed and discharged downward, there will be coated sand in the area formed between different partition plates 6, that is, the coated sand is evenly distributed on the top surface of the first screen plate 2, thereby avoiding the situation where the coated sand falls to the top of the first screen plate 2 and accumulates in a certain place.

[0027] A motor 12 is fixedly installed at the bottom end of the second screen plate 3, and a rotating shaft 13 is fixedly connected to the output shaft of the motor 12, and the rotating shaft 13 is rotatably connected to the connecting platform 11, and the dividing plate 5 is fixedly connected to the rotating shaft 13. At the same time, the motor 12 is started to drive the rotating shaft 13 to rotate, and the rotating shaft 13 drives the dividing plate 5 to rotate. The dividing plate 5 rotates along the top surface of the partition plate 6 and gradually passes through the top of the area between each partition plate 6. At this time, the dividing plate 5 will push and disperse the coated sand in the area between the partition plates 6, and push the coated sand that may have a stacking height exceeding the height of the partition plate 6 to the area between the next partition plates 6, thereby further dividing the coated sand in the area formed between the partition plates 6, so that the coated sand is more evenly distributed on the surface of the first screen plate 2, thereby preventing the coated sand from accumulating in the area between the partition plates 6 and affecting the screening efficiency in different areas.

[0028] like Figures 3 to 5 As shown, specifically, a plurality of stirring plates 14 are fixedly connected to the movable rod 8, a first spring 15 is fixedly connected between the movable rod 8 and the mounting plate 7, a bracket 16 is fixedly connected to the end of the movable rod 8, and a roller 17 is rotatably connected to the bracket 16, a corrugated ring 18 is fixedly installed in the screen drum 1, and the inner ring of the corrugated ring 18 is arranged in a wavy shape, the corrugated ring 18 and the roller 17 cooperate to enable the movable rod 8 to slide in the mounting plate 7, and a circular arc portion 19 is provided on the corrugated ring 18. When the above-mentioned rotating shaft 13 drives the dividing plate 5 to rotate, the dividing plate 5 drives the mounting plate 7 to rotate. At this time, the mounting plate 7 drives the movable rod 8 and the roller 17 to rotate. When the movable rod 8 rotates at the top of the first screen plate 2, the stirring plate 14 on the movable rod 8 can push the coated sand at the top of the first screen plate 2 to disperse, thereby enhancing its fluidity, thereby accelerating the screening efficiency and effectively reducing blockage.

[0029] At the same time, the rotation of the movable rod 8 makes the roller 17 slide along the inner circle of the corrugated ring 18 under the action of the first spring 15. Since the inner circle of the corrugated ring 18 is wavy, when the roller 17 passes through the wavy inner circle of the corrugated ring 18, the wavy convex part extrudes the roller 17 to pass through the support 16 to extrude the movable rod 8, so that the first spring 15 is forced to contract to generate a reaction force, and when the roller 17 moves to the concave part of the wavy, the movable rod 8 moves to reset under the reaction force of the first spring 15. Therefore, when the roller 17 rotates along the inner circle of the corrugated ring 18, the movable rod 8 and the stirring plate 14 repeatedly move on the mounting plate 7, that is, the stirring plate 14 can rotate on the top surface of the first sieve plate 2 to follow the mounting plate 7 to enhance the flowability of the coated sand, and at the same time, the stirring plate 14 can also move left and right on the mounting plate 7 through the movable rod 8, further enhancing the flowability of the coated sand, so that the coated sand has higher screening efficiency on the first sieve plate 2 and passes through the first sieve plate 2 faster. The enhancement of the flowability further reduces the possibility of accumulation.

[0030] As Figures 5 to 9As shown, in particular, the transfer box 10 is fixedly installed with a containing cylinder 20, and the containing cylinder 20 is slidingly connected with a sliding column 21, and the sliding column 21 is fixedly connected with the containing cylinder 20 with a second spring 22, and the top end of the sliding column 21 is fixedly connected with a sealing plate 23, and the sealing plate 23 is fixedly installed with a stop block 24, and the pushing box 9 is provided with an inclined surface 25, and the stop block 24 is provided with an inclined shape matched with the inclined surface 25, and the stop block 24 and the inclined surface 25 cooperate to move the sealing plate 23 up and down, and in the above process, the continuous rotation of the mounting plate 7 makes the coated sand on the top end of the first sieve plate 2 continuously sieved, and the coated sand that does not meet the size specification is located on the top end of the first sieve plate 2 and cannot pass through, at this time, the rotation of the mounting plate 7 drives the pushing box 9 to rotate on the top end of the first sieve plate 2, and the rotation of the pushing box 9 can collect the large particle coated sand on the top end of the first sieve plate 2, and the large particle coated sand enters the inside of the pushing box 9 along with the rotation of the pushing box 9, and when the pushing box 9 moves to the stop block 24, because the pushing box 9 is provided with the inclined surface 25, and the stop block 24 is provided with an inclined shape matched with the inclined surface 25, so that when the inclined surface 25 contacts and cooperates with the stop block 24, the stop block 24 is extruded and moves downward, the second spring 22 is contracted under stress to generate a reaction force, and the downward movement of the stop block 24 makes the sealing plate 23 move downward and separate from the first sieve plate 2, at this time, the large particle coated sand in the pushing box 9 falls downward to the top end of the sealing plate 23 and slides downward into the transfer box 10, and then is discharged outward through the transfer box 10, so that manual removal of the large particle coated sand sieved on the first sieve plate 2 is not required, and the timely discharge of the large particle coated sand can prevent it from being too much to block the first sieve plate 2 and affect the timely passing of the coated sand meeting the requirements, and after the pushing box 9 is separated from the stop block 24, the stop block 24 drives the sealing plate 23 to move upward under the reaction force of the second spring 22, and keeps the sealing of the transfer box 10, and the arc part 19 is not provided with corrugations, so that when the roller 17 rotates to this position, the stirring plate 14 and the movable rod 8 will not repeatedly slide on the mounting plate 7, and then the stirring plate 14 passes between the stop blocks 24, and the stop blocks 24 pass through the gap between the mounting plate 7 and the support 16.

[0031] As Figure 2 , Figure 3 and Figure 10As shown, specifically, a connecting tube 26 is fixedly installed at the bottom end of the first screen plate 2, and a number of guide plates 27 are fixedly connected to the connecting tube 26. The guide plates 27 are used to guide the coated sand passing through the first screen plate 2 to fall onto the second screen plate 3. After the first screen plate 2 screens the coated sand, the coated sand that meets the requirements passes through the first screen plate 2 and falls downward. In the process of falling downward, it gradually passes between the guide plates 27. The guide plates 27 guide its path so that the coated sand between different guide plates 27 falls correspondingly between the partition plates 6 on the second screen plate 3, so that the coated sand maintains uniformity when it is on the surface of the second screen plate 3. The second screen plate 3 further screens the coated sand. According to the above principle and process, the drive of the motor 12 can also make the coated sand on the second screen plate 3 evenly distributed, while enhancing the fluidity, improving the screening efficiency, and making the coated sand that does not meet the specifications be discharged smoothly.

[0032] The connecting tube 26 and the guide plate 27 are both hollow and interconnected. A cooling air duct 28 is fixedly connected to the guide plate 27, and the cooling air duct 28 passes through the sieve tube 1. A number of air outlet ducts 29 are evenly opened on the guide plate 27, and the air outlet ducts 29 are arranged in an inclined downward shape. At the same time, external cooling air enters the guide plate 27 through the cooling air duct 28, and the cooling air flows into each guide plate 27 and is discharged outward through the air outlet duct 29, cooling the coated sand that falls downward through the guide plates 27. Since the coated sand falls downward from the first sieve plate 2 to the second sieve plate 3, it is scattered through the guide plates 27, so that the cooling air can better fully contact the coated sand, resulting in better cooling effect and faster cooling. At the same time, the air outlet duct 29 is arranged in an inclined downward shape, so that the coated sand scattered downward is not easy to enter the air outlet duct 29 and falls into the inside of the guide plate 27, while the coated sand that passes through the second sieve plate 3 is discharged downward.

[0033] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.

[0034] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A screening device for processing and cooling coated sand, comprising a screen drum (1), characterized in that: A first sieve plate (2) and a second sieve plate (3) are fixedly mounted in the sieve cylinder (1); The screen drum (1) is provided with a material distribution assembly, which is used to evenly distribute the coated sand on the surfaces of the first screen plate (2) and the second screen plate (3). The material distribution assembly includes a discharge drum (4) fixedly mounted on the screen drum (1), and a material distribution plate (5) and a plurality of material separation plates (6) are provided in the inner cavity of the screen drum (1); The distribution plate (5) is provided with a stirring assembly, which is used to enhance the fluidity of the coated sand on the first screen plate (2) and the second screen plate (3) and improve the screening efficiency of the coated sand. The stirring assembly includes a mounting plate (7) fixedly mounted on the distribution plate (5), and a movable rod (8) is slidably connected to the mounting plate (7); A discharge assembly is provided on the mounting plate (7), and the discharge assembly is used to discharge coated sand that does not meet the specifications after screening. The discharge assembly includes a push box (9) fixedly mounted on the mounting plate (7), and a transfer box (10) for cooperating with the push box (9) to discharge materials outward is fixedly mounted at the bottom ends of the first sieve plate (2) and the second sieve plate (3).

2. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: The bottom of the inner cavity of the discharge barrel (4) is opened in a cone shape, and a plurality of through holes are evenly opened on the bottom surface of the cone.

3. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: A connecting platform (11) is fixedly mounted on each of the first sieve plate (2) and the second sieve plate (3), and a plurality of material separators (6) are fixedly connected to the connecting platform (11). The plurality of material separators (6) evenly divide the tops of the first sieve plate (2) and the second sieve plate (3) into a plurality of areas.

4. The screening equipment for coating sand processing and cooling according to claim 3, characterized in that: A motor (12) is fixedly mounted on the bottom end of the second sieve plate (3), a rotating shaft (13) is fixedly connected to the output shaft of the motor (12), and the rotating shaft (13) is rotatably connected to the connecting platform (11), and the material distribution plate (5) is fixedly connected to the rotating shaft (13).

5. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: A plurality of stirring plates (14) are fixedly connected to the movable rod (8), and a first spring (15) is fixedly connected between the movable rod (8) and the mounting plate (7).

6. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: The end of the movable rod (8) is fixedly connected to a bracket (16), and a roller (17) is rotatably connected to the bracket (16). A corrugated ring (18) is fixedly installed in the screen drum (1), and the inner ring of the corrugated ring (18) is arranged in a wavy shape. The corrugated ring (18) and the roller (17) cooperate to allow the movable rod (8) to slide in the mounting plate (7). The corrugated ring (18) is provided with an arc portion (19).

7. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: A receiving cylinder (20) is fixedly installed in the transfer box (10), and a sliding column (21) is slidably connected in the receiving cylinder (20). A second spring (22) is fixedly connected between the sliding column (21) and the receiving cylinder (20), and a sealing plate (23) is fixedly connected to the top end of the sliding column (21).

8. The screening equipment for coating sand processing and cooling according to claim 7, characterized in that: A stopper (24) is fixedly mounted on the sealing plate (23), a slope (25) is provided on the pushing box (9), and an inclined shape matching the slope (25) is provided on the stopper (24), and the stopper (24) and the slope (25) cooperate to enable the sealing plate (23) to move up and down.

9. The screening equipment for coating sand processing and cooling according to claim 1, characterized in that: A connecting tube (26) is fixedly mounted on the bottom end of the first screen plate (2), and a plurality of guide plates (27) are fixedly connected to the connecting tube (26). The guide plates (27) are used to guide the coated sand passing through the first screen plate (2) to fall onto the second screen plate (3).

10. The screening equipment for coating sand processing and cooling according to claim 9, characterized in that: The connecting cylinder (26) and the guide plate (27) are both hollow and internally interconnected. A cooling air duct (28) is fixedly connected to the guide plate (27), and the cooling air duct (28) passes through the sieve cylinder (1). A plurality of air outlet ducts (29) are evenly arranged on the guide plate (27), and the air outlet ducts (29) are arranged in a downwardly inclined manner.

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