Rotary precoated sand feeding cover

Abstract

The utility model relates to the technical field of precoated sand processing, in particular to a precoated sand rotary feeding cover which comprises a screening box, a feeding hopper is installed at one end of the top of the screening box in an embedded mode, two sets of crushing rollers are installed on the inner side of the feeding hopper, and supporting legs are installed at the corners of the bottom of the screening box. A discharging pipe is installed at the bottom end of the screening box in an embedded mode, a screening and sweeping mechanism is installed on the screening box and comprises a reciprocating screening assembly, a pushing assembly, a rotary screening assembly and a scraping and sweeping assembly, and the reciprocating screening assembly is used for conducting transverse reciprocating motion to screen materials. The reciprocating screening and scraping screening device is simple in structure and convenient to operate, qualified powder can be completely screened out through reciprocating screening and scraping screening, then materials which are completely smashed are scraped, swept and collected, the situation that the materials are deposited on the screen and affect the follow-up screening efficiency is avoided, part of the materials clamped into the movable inner sides of screen holes can be ejected out and swept out, and the screening efficiency is improved. And the subsequent screening and feeding effects are ensured.

Description

Technical Field

[0001] This utility model relates to the field of coated sand processing technology, specifically to a coated sand rotary feeder. Background Technology

[0002] Coated sand is molding sand or core sand with a solid resin film coated on the surface of the sand grains before molding. There are two coating processes: cold and hot. The cold method uses ethanol to dissolve the resin and adds hexamethylenetetramine during sand mixing, so that the two coat the surface of the sand grains. The ethanol evaporates to obtain coated sand. The hot method preheats the sand to a certain temperature, adds resin to melt it, stirs to coat the surface of the sand grains with resin, adds hexamethylenetetramine aqueous solution and lubricant, cools, crushes, and separates to obtain coated sand, which is used for cast steel and cast iron parts. During the processing, coated sand needs to be fed into the machine body of various equipment through feeding. However, in some humid environments, coated sand is prone to agglomerate. If the agglomerated coated sand is not broken up, it will affect the quality of the processed workpieces, thus causing difficulties in subsequent processing. Although the screen plate can slow down the fall of coated sand, coated sand will remain on each layer of the screen plate, and the coated sand passing through the center of the screen plate cannot be preheated well, resulting in uneven preheating.

[0003] To solve the above-mentioned technical problems, Chinese Patent No. CN215144422U discloses a coated sand rotary feed hood, which includes a hood body, a connecting pipe fixedly connected to one side of the top of the hood body, and rollers rotatably connected to the inner wall of the connecting pipe, wherein the number of rollers is two. A first motor is fixedly connected to one side of the connecting pipe.

[0004] Although the existing technical solution mentioned above uses a scraper to scrape on the filter plate to assist the coated sand in passing through the filter plate, when the scraper rotates and scrapes on the filter plate, some of the larger-sized crushed particles become completely clumps and cannot fall down. Instead, they are pushed around by the scraper. Some clumps with sizes close to the screen mesh size will also get stuck in the holes and cause blockage, which in turn affects the efficiency of subsequent screening and feeding. Utility Model Content

[0005] The purpose of this invention is to provide a coated sand rotary feed hood to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A coated sand rotary feed hood includes a screening box. A feed hopper is embedded at one end of the top of the screening box. Two sets of crushing rollers are installed inside the feed hopper. Support feet are installed at the corners of the bottom of the screening box. A discharge pipe is embedded at the bottom of the screening box. A screening and cleaning mechanism is installed on the screening box. The screening and cleaning mechanism includes a reciprocating screening component, a pushing component, a rotary screening component, and a scraping component. The reciprocating screening component is used for transverse reciprocating motion to screen materials. The rotary screening component is used for rotating, pressing, and scraping materials. The scraping component is used to sweep out materials of unqualified sizes that have been intercepted. The pushing component is used to push out material particles stuck on the reciprocating screening component.

[0008] As a preferred embodiment of this utility model, the reciprocating screening assembly includes a first motor installed on one side of the screening box. A first movable shaft is installed at one end of the first motor extending into the inner side of the screening box. A first connecting plate is sleeved on the outer side of the first movable shaft. A second movable shaft is rotatably connected to the end of the first connecting plate away from the first movable shaft. A second connecting plate is rotatably connected to the end of the second movable shaft extending into the outer side of the first connecting plate. A third movable shaft is rotatably connected to the end of the second connecting plate away from the second movable shaft. A third connecting plate is rotatably connected to the end of the third movable shaft extending into the outer side of the second connecting plate. Movable grooves are provided at both ends of the screening box. Movable blocks are slidably connected inside the movable grooves. Screen plates are installed at both ends of the movable blocks. One end of the third connecting plate is fixedly connected to one side of the screen plate. The cross-section of the movable block is T-shaped. Screen meshes are installed on the inner sides of both sets of screen plates. An extension groove that is slidably connected to the screen plates is provided on the other side of the inner wall of the screening box.

[0009] As a preferred embodiment of this utility model, the rotary screening assembly includes two sets of first motors installed inside the screening box. An adjusting cylinder is installed on one side of the first motor. A first bevel gear is installed at the end of the drive end of the first motor extending into the inner side of the adjusting cylinder. A first threaded rod is rotatably connected to the inner side of the adjusting cylinder. A second bevel gear that meshes with the first bevel gear is installed at one end of the outer side of the first threaded rod. A movable sleeve is threadedly connected to the other end of the outer side of the first threaded rod. A second motor is installed at one end of the movable sleeve. A movable plate is installed at the drive end of the second motor. Multiple sets of protrusions are arranged at the bottom of the movable plate. The movable sleeve is slidably connected to the inner side of the adjusting cylinder.

[0010] As a preferred embodiment of this utility model, the scraping assembly includes two sets of scraping grooves opened on both sides inside the screening box. A second threaded rod is rotatably connected to the inner side of the scraping groove, and a sliding block is threadedly connected to the outer side of the second threaded rod. The sliding block is slidably connected to the scraping groove. A sweeping plate is installed at one end of the sliding block, and a brush is installed on one side of the sweeping plate. Two sets of second motors are installed on one side of the screening box. The drive end of the second motor extends to the inner side of the scraping groove and is fixedly connected to one end of the second threaded rod.

[0011] As a preferred embodiment of this utility model, the pushing assembly includes a fixed cylinder embedded in one end of the top of the screen plate. A first lead screw is rotatably connected to the inner side of the fixed cylinder, and a pushing cylinder is threadedly connected to the outer side of the first lead screw. A pushing motor is installed at the top of the fixed cylinder, and the driving end of the pushing motor extends to the inner side of the fixed cylinder and is fixedly connected to one end of the first lead screw. An installation plate is installed at the bottom of the pushing cylinder, and a pushing frame is installed at one end of the installation plate. Multiple sets of push rods are arranged at the top of the pushing frame, and the push rods are slidably connected to the screen holes on the screen.

[0012] As a preferred embodiment of this utility model, the fixed cylinder has limit grooves on both sides inside, and the pushing cylinder has limit blocks installed on both sides, with the limit blocks and limit grooves being slidably connected.

[0013] As a preferred embodiment of this utility model, both ends of one side of the screening box are provided with discharge ports, and a positioning groove is provided on the outside of the screening box below the discharge port. A positioning block is engaged with the inside of the positioning groove. A magnetic block is embedded in one end of the positioning block, and an iron block that attracts the magnetic block is embedded in the inner wall of the positioning groove. A recycling box is installed at the other end of the positioning block, and a transparent window is embedded in one side of the recycling box.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, materials are screened by the reciprocating sieving component moving laterally back and forth, the rotating sieving component rotates and grinds and scrapes the materials, the scraping component sweeps out the intercepted non-conforming materials, and the pushing component pushes out the lumps of materials stuck on the reciprocating sieving component. The structure is simple and easy to operate. The reciprocating sieving and scraping sieving ensure that qualified powder is completely screened out. Then, the completely crushed materials are scraped and collected to avoid accumulating on the screen and affecting the subsequent screening efficiency. In addition, some materials stuck inside the screen holes can be pushed out and swept out, ensuring the subsequent screening and feeding effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2This is a partial cross-sectional view of the screening box of this utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the sieve mesh and sieve plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the pusher frame of this utility model.

[0020] In the diagram: 1. Screening box; 2. Feed hopper; 3. Crushing roller; 4. Discharge pipe; 5. Transparent window; 6. First movable shaft; 7. Second movable shaft; 8. Third movable shaft; 9. Movable block; 10. Scraping groove; 11. Sweeping plate; 12. Brush; 13. Screen plate; 14. Screen mesh; 15. First motor; 16. Adjusting cylinder; 17. First threaded rod; 18. Movable sleeve; 19. Second motor; 20. Movable plate; 21. Protrusion; 22. Second threaded rod; 23. Fixed cylinder; 24. First lead screw; 25. Pushing motor; 26. Pushing frame; 27. Push rod; 28. Limiting block; 29. ​​Discharge port; 30. Positioning block; 31. Magnetic block; 32. Pushing cylinder. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example:

[0023] Please see Figures 1-4 This utility model provides a technical solution:

[0024] A coated sand rotary feed hood includes a screening box 1. A feed hopper 2 is embedded at one end of the top of the screening box 1. Two sets of crushing rollers 3 are installed inside the feed hopper 2. Support feet are installed at the bottom corners of the screening box 1. A discharge pipe 4 is embedded at the bottom of the screening box 1. A screening and cleaning mechanism is installed on the screening box 1. The screening and cleaning mechanism includes a reciprocating screening component, a pushing component, a rotary screening component, and a scraping component. The reciprocating screening component is used for transverse reciprocating motion to screen materials. The rotary screening component is used for rotary grinding and scraping the materials. The scraping component is used to sweep out the intercepted non-conforming materials. The pushing component is used to push the reciprocating screening component... The device pushes out any stuck material particles. During use, the reciprocating screening component can screen materials by moving laterally back and forth, the rotating screening component can rotate and grind and scrape the materials, the scraping component can sweep out the intercepted unqualified materials, and the pushing component can push out the lumps stuck on the reciprocating screening component. The structure is simple and easy to operate. The reciprocating screening and scraping screening ensure that qualified powder is completely screened out. Then, the completely crushed material is scraped and collected to avoid accumulating on the screen 14 and affecting the subsequent screening efficiency. It can also push out some of the material stuck inside the holes of the screen 14 and sweep it out, ensuring the subsequent screening and feeding effect.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the reciprocating screening assembly includes a first motor installed on one side of the screening box 1. A first movable shaft 6 is installed at one end of the first motor extending into the inner side of the screening box 1. A first connecting plate is sleeved on the outer side of the first movable shaft 6. A second movable shaft 7 is rotatably connected to the end of the first connecting plate away from the first movable shaft 6. A second connecting plate is rotatably connected to the end of the second movable shaft 7 extending into the outer side of the first connecting plate. A third movable shaft 8 is rotatably connected to the end of the second connecting plate away from the second movable shaft 7. A third connecting plate is rotatably connected to the end of the third movable shaft 8 extending into the outer side of the second connecting plate. Movable grooves are opened at both ends inside the screening box 1, and movable blocks 9 are slidably connected inside the movable grooves. Both ends of the movable block 9 are equipped with screen plates 13. One end of the third connecting plate is fixedly connected to one side of the screen plate 13. The cross-section of the movable block 9 is T-shaped. Screen mesh 14 is installed on the inner side of both sets of screen plates 13. An extension groove that is slidably connected to the screen plate 13 is opened on the other side of the inner wall of the screening box 1. First, the material is poured in through the feed hopper 2. Then, the first motor is started to drive the first movable shaft 6 to rotate, which drives the first connecting plate to swing around. The second movable shaft 7 rotates and continues to drive the second connecting plate to swing. At the same time, the third movable shaft 8 rotates and pulls the screen mesh 14 on the screen plate 13 to perform a horizontal reciprocating motion, thereby realizing the screening operation and allowing qualified broken materials to fall out after passing through two layers of screening.

[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the rotary screening assembly includes two sets of first motors 15 installed inside the screening box 1. An adjusting cylinder 16 is installed on one side of each first motor 15. A first bevel gear is installed at one end of the drive end of the first motor 15 extending into the inner side of the adjusting cylinder 16. A first threaded rod 17 is rotatably connected to the inner side of the adjusting cylinder 16. A second bevel gear, meshing with the first bevel gear, is installed at one end of the outer side of the first threaded rod 17. A movable sleeve 18 is threaded to the other end of the outer side of the first threaded rod 17. A second motor 19 is installed at one end of the movable sleeve 18. A movable plate 20 is installed at the drive end of the second motor 19. Multiple sets of protrusions 21 are arranged at the bottom of the movable plate 20. The movable sleeve 18 slides against the inner side of the adjusting cylinder 16. Connect, then start the first motor 15 to drive the first bevel gear to rotate, and at the same time drive the second bevel gear and the first threaded rod 17 to rotate, so that the movable sleeve 18 moves accordingly, driving the movable plate 20 and protrusions 21 on the second motor 19 to approach the top surface of the screen 14. After starting the second motor 19, the drive end of the second motor 19 can make the movable plate 20 rotate clockwise or counterclockwise. At this time, the multiple sets of protrusions 21 at the bottom of the movable plate 20 contact the top surface of the screen 14. The protrusions 21 rotate clockwise or counterclockwise with the movable plate 20. While the protrusions 21 are scraping around, they can scrape open the qualified material powder that is lumped together on the top surface of the screen 14 and make it fall through the holes of the screen 14.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the scraping assembly includes two sets of scraping grooves 10 located on both sides inside the screening box 1. A second threaded rod 22 is rotatably connected to the inner side of the scraping groove 10, and a sliding block is threadedly connected to the outer side of the second threaded rod 22. The sliding block and the scraping groove 10 are slidably connected. A sweeping plate 11 is installed at one end of the sliding block, and a brush 12 is installed on one side of the sweeping plate 11. Two sets of second motors are installed on one side of the screening box 1. The drive end of the second motor extends to the inner side of the scraping groove 10 and is fixedly connected to one end of the second threaded rod 22. Both ends of one side of the screening box 1 have discharge ports 29. A positioning groove is opened below the discharge port 29 on the outer side of the screening box 1. A positioning block 30 is engaged with the inner side of the positioning groove. A magnetic block 31 is embedded in one end of the positioning block 30. A magnetic block 31 is embedded in the inner wall of the positioning groove. The iron block is attached to the magnetic block 31. A recycling box is installed at the other end of the positioning block 30. A transparent window 5 is embedded in one side of the recycling box. Further, after the screen plate 13 is brought close to the discharge port 29 by the reciprocating screening assembly, the second motor is started to drive the two sets of second threaded rods 22 to rotate synchronously, so that the sliding block moves inside the scraping groove 10, and drives the brush 12 at the bottom of the sweeping plate 11 to sweep the clumps of material on the top surface of the screen 14 out of the discharge port 29. The clumps of material fall into the recycling box from the discharge port 29 for collection. After collection, the recycling box can be pulled away from the screening box 1 to make the positioning block 30 disengage from the inner side of the positioning groove, so that the magnetic block 31 and the iron block are no longer attached. Then the collected material can be sent for crushing again.

[0028] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the feeding assembly includes a fixed cylinder 23 embedded in one end of the top of the screen plate 13. A first lead screw 24 is rotatably connected to the inside of the fixed cylinder 23, and a pushing cylinder 32 is threadedly connected to the outside of the first lead screw 24. A pushing motor 25 is installed at the top of the fixed cylinder 23, and the driving end of the pushing motor 25 extends to the inside of the fixed cylinder 23 and is fixedly connected to one end of the first lead screw 24. A mounting plate is installed at the bottom of the pushing cylinder 32, and a pushing frame 26 is installed at one end of the mounting plate. Multiple sets of push rods 27 are arranged at the top of the pushing frame 26. The push rods 27 are connected to the screen 14. The sieve holes are slidably connected. Limiting grooves are opened on both sides of the inside of the fixed cylinder 23. Limiting blocks 28 are installed on both sides of the pushing cylinder 32. The limiting blocks 28 and the limiting grooves are slidably connected. Furthermore, the pushing motor 25 can be started to drive the first lead screw 24 to rotate. The pushing cylinder 32, together with the limiting blocks 28 and the limiting grooves, drives the pushing frame 26 to retract. The pushing frame 26 fits against one side of the sieve plate 13. The push rod 27 gradually enters the inside of the holes of the screen 14 to push out the stuck material particles and place them on the top surface of the screen 14 so that they can be swept out in a concentrated manner later.

[0029] The implementation principle of the coated sand rotary feed hood in this application embodiment is as follows: Material is poured into the feed hopper 2, then the first motor is started to drive the first movable shaft 6 to rotate, causing the first connecting plate to swing in a circle. The second movable shaft 7 rotates and continues to drive the second connecting plate to swing. At the same time, the third movable shaft 8 rotates and, together with the third connecting plate, pulls the screen 14 on the screen plate 13 to perform a lateral reciprocating motion, realizing the screening operation. After the qualified crushed material passes through two layers of screening, it falls out. The first motor 15 is started to drive the first bevel gear to rotate, and at the same time, it drives... The rotation of the second bevel gear and the first threaded rod 17 causes the movable sleeve 18 to move accordingly, driving the movable plate 20 and protrusions 21 on the second motor 19 to approach the top surface of the screen 14. After the second motor 19 is started, the drive end of the second motor 19 can make the movable plate 20 rotate clockwise or counterclockwise. At this time, the multiple sets of protrusions 21 at the bottom of the movable plate 20 contact the top surface of the screen 14. As the movable plate 20 rotates clockwise or counterclockwise, the protrusions 21 scrape and clump together on the top surface of the screen 14 while scraping in a circular motion. The qualified material powder at one point on the screen 14 is allowed to fall through the holes of the screen 14. Using the reciprocating screening assembly, one end of the screen plate 13 is brought close to the discharge port 29. Then, the second motor is started, driving the two sets of second threaded rods 22 to rotate synchronously. This causes the sliding block to move inside the scraping groove 10, driving the brush 12 at the bottom of the sweeping plate 11 to sweep the clumps of material on the top surface of the screen 14 out through the discharge port 29. The clumps of material fall from the discharge port 29 into the collection box for collection. After collection, the collection box can be moved away from the screening box 1. Pulling it to the side causes the positioning block 30 to disengage from the inner side of the positioning groove, so that the magnetic block 31 and the iron block are no longer attracted. Then the collected material can be sent for further crushing. The push motor 25 can be started to drive the first lead screw 24 to rotate. The push cylinder 32, together with the limit block 28 and the limit groove, drives the push frame 26 to retract. The push frame 26 fits against one side of the screen plate 13. The push rod 27 gradually enters the inner side of the hole of the screen 14 to push out the stuck material particles and place them on the top surface of the screen 14 for subsequent centralized sweeping.

[0030] The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coated sand rotary feed hood, comprising a screening box (1), characterized in that: The top end of the screening box (1) is embedded with a feeding hopper (2), and two sets of crushing rollers (3) are installed inside the feeding hopper (2). Support feet are installed at the bottom corners of the screening box (1). A discharge pipe (4) is embedded at the bottom end of the screening box (1). A screening and cleaning mechanism is installed on the screening box (1). The screening and cleaning mechanism includes a reciprocating screening component, a pushing component, a rotating screening component, and a scraping component. The reciprocating screening component is used for transverse reciprocating motion to screen materials. The rotating screening component is used for rotating and grinding and scraping materials. The scraping component is used to sweep out the intercepted unqualified materials. The pushing component is used to push out the material particles stuck on the reciprocating screening component. The reciprocating screening assembly includes a first motor installed on one side of the screening box (1). A first movable shaft (6) is installed at one end of the first motor extending into the inner side of the screening box (1). A first connecting plate is sleeved on the outer side of the first movable shaft (6). A second movable shaft (7) is rotatably connected to the end of the first connecting plate away from the first movable shaft (6). A second connecting plate is rotatably connected to the end of the second movable shaft (7) extending into the outer side of the first connecting plate. A third movable shaft (8) is rotatably connected to the end of the second connecting plate away from the second movable shaft (7). The movable shaft (8) extends to one end of the second connecting plate and is rotatably connected to the third connecting plate. The screening box (1) has movable grooves at both ends. Movable blocks (9) are slidably connected inside the movable grooves. Screen plates (13) are installed at both ends of the movable blocks (9). One end of the third connecting plate is fixedly connected to one side of the screen plate (13). The movable block (9) has a T-shaped cross section. Screen mesh (14) is installed on the inner side of both sets of screen plates (13). An extension groove that is slidably connected to the screen plate (13) is opened on the other side of the inner wall of the screening box (1). The rotary screening assembly includes two sets of first motors (15) installed inside the screening box (1). An adjusting cylinder (16) is installed on one side of the first motor (15). A first bevel gear is installed at the end of the drive end of the first motor (15) extending to the inside of the adjusting cylinder (16). A first threaded rod (17) is rotatably connected to the inside of the adjusting cylinder (16). A second bevel gear that meshes with the first bevel gear is installed at the outer end of the first threaded rod (17). A movable sleeve (18) is threaded to the other outer end of the first threaded rod (17). A second motor (19) is installed at one end of the movable sleeve (18). A movable plate (20) is installed at the drive end of the second motor (19). Multiple sets of protrusions (21) are arranged at the bottom of the movable plate (20). The movable sleeve (18) is slidably connected to the inside of the adjusting cylinder (16). The scraping assembly includes two sets of scraping grooves (10) opened on both sides inside the screening box (1). A second threaded rod (22) is rotatably connected to the inside of the scraping groove (10). A sliding block is threadedly connected to the outside of the second threaded rod (22). The sliding block is slidably connected to the scraping groove (10). A sweeping plate (11) is installed at one end of the sliding block. A brush (12) is installed on one side of the sweeping plate (11). Two sets of second motors are installed on one side of the screening box (1). The driving end of the second motor extends to the inside of the scraping groove (10) and is fixedly connected to one end of the second threaded rod (22). The feeding assembly includes a fixed cylinder (23) embedded in one end of the top of the screen plate (13). A first lead screw (24) is rotatably connected to the inside of the fixed cylinder (23). A pushing cylinder (32) is threadedly connected to the outside of the first lead screw (24). A pushing motor (25) is installed at the top of the fixed cylinder (23). The driving end of the pushing motor (25) extends to the inside of the fixed cylinder (23) and is fixedly connected to one end of the first lead screw (24). An installation plate is installed at the bottom of the pushing cylinder (32). A pushing frame (26) is installed at one end of the installation plate. Multiple sets of push rods (27) are arranged at the top of the pushing frame (26). The push rods (27) are slidably connected to the screen holes on the screen (14). The fixed cylinder (23) has limit grooves on both sides inside, and the push cylinder (32) has limit blocks (28) installed on both sides. The limit blocks (28) and the limit grooves are slidably connected. The screening box (1) has discharge ports (29) at both ends on one side. A positioning groove is provided on the outside of the screening box (1) below the discharge port (29). A positioning block (30) is engaged with the inside of the positioning groove. A magnetic block (31) is embedded in one end of the positioning block (30). An iron block that attracts the magnetic block (31) is embedded in the inner wall of the positioning groove. A recycling box is installed at the other end of the positioning block (30). A transparent window (5) is embedded in one side of the recycling box.

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