Multiple refining and crushing device for coated sand regeneration

Abstract

The application relates to the technical field of coated sand regeneration equipment, and particularly relates to a multiple-refining crushing device for coated sand regeneration; the device comprises a stirring crushing device, a rolling box, a flattening device, a discharging mechanism and a rolling device; the flattening device comprises a horizontal sliding mechanism, a lifting device and a scraper; the mold is stirred and crushed by the stirring crushing device, so that the mold enters the rolling box through the stirring crushing device; at this time, the mold is stirred and crushed into small pieces and is accumulated in the rolling box; the lifting device can adjust the scraper according to the height of the accumulated mold; the small pieces can be laid flat in the rolling box through the horizontal sliding device; when the laying is completed, the small pieces can be rolled through the rolling device until the small pieces are rolled to the required size; and then the small pieces are discharged through the discharging mechanism; through the above operation, the mold can be processed for multiple times to obtain coated sand with uniform texture, so that repeated processing is not needed, and the processing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of coated sand recycling equipment, specifically to a multi-stage refining and crushing device for coated sand recycling. Background Technology

[0002] Coated sand, a commonly used mold casting material in modern metallurgical industry, plays an important role in metal casting. Molds made of coated sand are often recycled and reused after casting to reduce costs. However, the molds used for casting are generally quite hard and difficult to crush. Therefore, a heavy hammer is often used to crush them. While this method effectively crushes the mold, it may affect the particle size of the coated sand. During the crushing process, the coated sand becomes further refined, and sufficiently small particle sizes will affect its properties. Furthermore, this crushing method makes it difficult to transfer the crushed coated sand, thus increasing the difficulty of regenerating it.

[0003] Chinese Patent No. CN213856903U discloses a crushing device for regenerating coated sand. This device crushes the coated sand by driving the lower pressure plate with a hydraulic cylinder. However, in actual operation, the mold is a complete carrier after use. Although the lower pressure plate driven by the hydraulic cylinder can crush the mold and obtain coated sand, it cannot refine the coated sand, which leads to the need for further processing and thus causes inconvenience in use. Summary of the Invention

[0004] To address the problems existing in current technology, a multi-stage refining and crushing device for regenerating coated sand is provided. The device uses a crushing unit to break down the abrasive molds, which then enter a compaction box. The molds are broken into small pieces and accumulate inside the compaction box. A lifting device adjusts the scraper according to the height of the accumulated molds. A horizontal sliding device spreads the small pieces evenly into the compaction box. After spreading, the compaction device crushes the small pieces until they reach the desired size. The material is then discharged through a discharge device. This process allows for multiple processing steps to obtain uniform coated sand from the mold, eliminating the need for repeated processing and improving processing efficiency.

[0005] To address the problems of existing technologies, this invention provides a multi-stage refining and crushing device for coated sand recycling, comprising a crushing box, a crushing device fixedly installed on the top of the crushing box, a leveling device installed inside the crushing box, an extension plate installed on the left side of the crushing box, the leveling device comprising a horizontal sliding mechanism, a lifting device, and a scraper, the horizontal sliding device being fixedly installed on the inner top of the crushing box, the lifting device being fixedly installed at the output end of the horizontal sliding device, the scraper being fixedly installed at the output end of the lifting device, the crushing device being fixedly installed on the left and right sides inside the crushing box, and a discharge mechanism being fixedly installed on the extension plate of the crushing box.

[0006] Preferably, the crushing device includes a crushing box, a first crushing mechanism, a second crushing mechanism, a pulley assembly, a first gear, a second gear, and a first drive unit. The crushing box is fixedly mounted on the top of the crushing box. The first crushing mechanism and the second crushing mechanism are mirror-rotated on the crushing box. The first gear is fixedly mounted on the first crushing mechanism, and the second gear is fixedly mounted on the second gear. One end of the pulley assembly is fixedly mounted on the first crushing mechanism, and the other end of the pulley assembly is fixedly mounted on the output end of the first drive unit. The first drive unit is fixedly mounted on the top of the crushing box.

[0007] Preferably, the horizontal sliding mechanism includes a first bracket, a threaded rod, a second drive unit, a second bracket, and a stabilizer bar. The first bracket and the second bracket are mirror images of each other on the inner top of the compaction box. The threaded rod is rotatably mounted on the first bracket. The second drive unit is fixedly mounted on the first bracket. The output end of the second drive unit is fixedly connected to the threaded rod. The stabilizer bar is fixedly mounted on the second bracket.

[0008] Preferably, the lifting device includes a first lifting mechanism and a second lifting mechanism, the first lifting mechanism being slidably mounted on the threaded rod, and the second lifting mechanism being slidably mounted on the stabilizer rod.

[0009] Preferably, the first lifting mechanism and the second lifting mechanism have the same structure. Both the first lifting mechanism and the second lifting mechanism include a first slider, a second slider, an X-shaped bracket, a fixed frame, a bidirectional lead screw, a third bracket, and a third drive unit. The third bracket is slidably mounted on the threaded rod, the bidirectional lead screw is rotatably mounted on the third bracket, and the third drive unit is fixedly mounted on the third bracket. The output end of the third drive unit is fixedly connected to the bidirectional lead screw. The first slider and the second slider are slidably mounted on the bidirectional lead screw. There are multiple X-shaped brackets, and each X-shaped bracket is hinged to each other. The side of the X-shaped bracket closest to the first slider and the second slider is hinged to the first slider and the second slider, and the side of the X-shaped bracket furthest from the first slider and the second slider is hinged to the fixed frame.

[0010] Preferably, the compaction device includes a first chain wheel assembly, a second chain wheel assembly, a fourth drive unit, a compaction roller, and a rotating shaft. The rotating shaft is rotatably mounted on the compaction box, the fourth drive unit is fixedly mounted outside the compaction box, and the output end of the fourth drive unit is fixedly connected to the rotating shaft. One end of the compaction roller is fixedly mounted on the first chain wheel assembly, and the other end of the compaction roller is fixedly mounted on the second chain wheel assembly.

[0011] Preferably, the first chain wheel assembly and the second chain wheel assembly have the same structure. Both the first chain wheel assembly and the second chain wheel assembly include a first sprocket, a second sprocket and a chain. The first sprocket is fixedly mounted on the rotating shaft, and the second sprocket is rotatably mounted on the crushing box. One end of the chain is sleeved on the first sprocket and the other end of the chain is sleeved on the second sprocket.

[0012] Preferably, the rolling roller includes a rotating shaft and a rotating roller. One end of the rotating shaft is fixedly connected to a first chain wheel assembly, and the other end of the rotating shaft is fixedly connected to a second chain wheel assembly. The rotating roller is rotatably mounted on the rotating shaft.

[0013] Preferably, the discharge mechanism includes a first sliding plate, a second sliding plate, a baffle, and a pushing mechanism. The first and second sliding plates are mirror images of each other on the left and right sides of the compaction box. The baffle is fixedly mounted on the extension plate, and the pushing mechanism is fixed on the baffle.

[0014] Preferably, the pushing mechanism includes a first cylinder, a second cylinder, and a push plate. The first cylinder and the second cylinder are mirror images of each other on the baffle, and the push plate is fixedly disposed at the output end of the first cylinder and the second cylinder.

[0015] The advantages of this application compared to the prior art are: This application achieves multiple crushing processes on materials through the coordinated operation of a crushing device, a leveling device, and a rolling device, thereby enabling the refinement of coated sand. Attached Figure Description

[0016] Figure 1 A schematic diagram of a three-dimensional structure of a multi-stage refining and crushing device for coated sand recycling. Figure 1 .

[0017] Figure 2 A schematic diagram of a three-dimensional structure of a multi-stage refining and crushing device for coated sand recycling. Figure 2 .

[0018] Figure 3 A schematic diagram of a three-dimensional structure of a multi-stage refining and crushing device for coated sand recycling. Figure 3 .

[0019] Figure 4 This is a front view of a multi-stage refining and crushing device for coated sand regeneration.

[0020] Figure 5 This is a side view of a multi-stage refining and crushing device for coated sand regeneration.

[0021] Figure 6 This is a side view of a partial structure of a multi-refining and crushing device for coated sand regeneration.

[0022] Figure 7 A partial three-dimensional structural diagram of a multi-stage refining and crushing device for coated sand recycling. Figure 1 .

[0023] Figure 8 A multi-stage refining and crushing device for coated sand regeneration Figure 7 Enlarged view of point A in the middle.

[0024] Figure 9 A partial three-dimensional structural diagram of a multi-stage refining and crushing device for coated sand recycling. Figure 2 .

[0025] The numbers on the map are: 1-Grinding device; 11-Grinding box; 12-First grinding mechanism; 13-Second grinding mechanism; 14-Pulley assembly; 15-First drive unit; 16-First gear; 17-Second gear; 2-Compactor box; 3-Leveling device; 31-Horizontal sliding mechanism; 311-First support; 312-Threaded rod; 313-Second drive unit; 314-Second support; 315-Stabilizing rod; 32-Lifting device; 321-First lifting mechanism; 3211-First slider; 3212-Second slider; 3 213-X-shaped bracket; 3214-fixed frame; 3215-third drive unit; 3216-double-acting lead screw; 3217-third bracket; 322-second lifting mechanism; 33-scraper; 4-discharge mechanism; 41-first sliding plate; 42-second sliding plate; 43-baffle; 44-pushing mechanism; 441-first cylinder; 442-second cylinder; 443-push plate; 5-crushing device; 51-first chain wheel assembly; 52-second chain wheel assembly; 53-fourth drive unit; 54-crushing roller. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0027] See Figures 1 to 9As shown, a multi-stage refining and crushing device for coated sand recycling includes a crushing box 2, a crushing device 1 fixedly installed on the top of the crushing box 2, a leveling device 3 installed inside the crushing box 2, and an extension plate installed on the left side of the crushing box 2. The leveling device 3 includes a horizontal sliding mechanism 31, a lifting device 32, and a scraper 33. The horizontal sliding device is fixedly installed on the inner top of the crushing box 2, the lifting device 32 is fixedly installed at the output end of the horizontal sliding device, the scraper 33 is fixedly installed at the output end of the lifting device 32, the crushing device 5 is fixedly installed on the left and right sides inside the crushing box 2, and the discharge mechanism 4 is fixedly installed on the extension plate of the crushing box 2.

[0028] When it is necessary to crush and recycle coated sand, the operator can place the recycled abrasive in the crushing device 1. The crushing device 1 crushes the abrasive and then enters the compaction box 2. At this time, the abrasive is crushed into small pieces and piled up in the compaction box 2. The lifting device 32 can adjust the scraper 33 according to the height of the piled abrasive. The horizontal sliding device can spread the small pieces evenly in the compaction box 2. After spreading, the compaction device 5 can compact the small pieces until they are compacted to the required size. Then, the material is discharged through the discharge device. Through the above operation, the mold can be processed multiple times to obtain coated sand with uniform texture, thus eliminating the need for repeated processing and improving processing efficiency.

[0029] See Figure 2 As shown, the crushing device 1 includes a crushing box 11, a first crushing mechanism 12, a second crushing mechanism 13, a pulley assembly 14, a first gear 16, a second gear 17, and a first drive unit 15. The crushing box 11 is fixedly installed on the top of the crushing box 2. The first crushing mechanism 12 and the second crushing mechanism 13 are mirror images of each other and rotate on the crushing box 11. The first gear 16 is fixedly installed on the first crushing mechanism 12, and the second gear 17 is fixedly installed on the second gear 17. One end of the pulley assembly 14 is fixedly installed on the first crushing mechanism 12, and the other end of the pulley assembly 14 is fixedly installed at the output end of the first drive unit 15. The first drive unit 15 is fixedly installed on the top of the crushing box 2.

[0030] When preliminary processing of the grinding wheel is required to achieve crushing, the grinding wheel is placed in the crushing box 11. At this time, the first drive unit 15 drives the pulley assembly 14 to rotate. The pulley assembly 14 consists of a first rotating wheel and a second rotating wheel. The first rotating wheel is fixedly installed at the output end of the first drive unit 15, and the second rotating wheel is fixedly installed on the first crushing mechanism 12. The first rotating wheel and the second rotating wheel are driven by a belt. When the first rotating wheel is driven to rotate by the first drive unit 15, the second rotating wheel drives the first crushing mechanism 12 to rotate through the belt drive. The external teeth of the first gear 16 and the second gear 17 mesh with each other. While the first crushing mechanism 12 rotates, it drives the first gear 16 to rotate, which in turn drives the second gear 17 to rotate, and the second gear 17 drives the second crushing mechanism 13 to rotate. The second crushing mechanism 13 rotates in the opposite direction to the first crushing mechanism 12. The first crushing mechanism 12 is provided with several first reamers on its outside, and the second crushing mechanism 13 is provided with several second reamers on its outside. The first and second reamers are staggered. Therefore, when the first crushing mechanism 12 and the second crushing mechanism 13 rotate, the first and second reamers rotate in opposite directions, thereby achieving the initial crushing of the grinding wheel, which facilitates subsequent grinding and refining.

[0031] See Figures 5 to 9 As shown, the horizontal sliding mechanism 31 includes a first bracket 311, a threaded rod 312, a second drive unit 313, a second bracket 314, and a stabilizing rod 315. The first bracket 311 and the second bracket 314 are mirror images of each other and are arranged on the inner top of the compaction box 2. The threaded rod 312 is rotatably mounted on the first bracket 311. The second drive unit 313 is fixedly mounted on the first bracket 311. The output end of the second drive unit 313 is fixedly connected to the threaded rod 312. The stabilizing rod 315 is fixedly mounted on the second bracket 314.

[0032] When the horizontal sliding device needs to move the scraper 33, the second drive unit 313 drives the threaded rod 312 to rotate. The lifting device 32 is provided with a through hole for the threaded rod 312 to pass through, and the through hole is provided with a thread for the threaded rod 312 to engage. Therefore, while the threaded rod 312 rotates, the lifting device 32 moves horizontally along the direction of the threaded rod 312. The stability of the lifting device 32 during the movement is maintained by the setting of the stabilizing rod 315. The movement of the lifting device 32 drives the scraper 33 to move, thereby realizing the scraping function of the scraper 33.

[0033] See Figures 5 to 9 As shown, the lifting device 32 includes a first lifting mechanism 321 and a second lifting mechanism 322. The first lifting mechanism 321 is slidably mounted on the threaded rod 312, and the second lifting mechanism 322 is slidably mounted on the stabilizer rod 315.

[0034] When the height of the scraper 33 needs to be adjusted, the height of the scraper 33 can be adjusted by the synchronous cooperation of the first lifting mechanism 321 and the second lifting mechanism 322. This allows the scraper 33 to level the material according to the height of the material accumulation, making it easier for the rolling device 5 to perform rolling processing.

[0035] See Figures 5 to 9 As shown, the first lifting mechanism 321 and the second lifting mechanism 322 have the same structure. Both the first lifting mechanism 321 and the second lifting mechanism 322 include a first slider 3211, a second slider 3212, an X-shaped bracket 3213, a fixed frame 3214, a bidirectional lead screw 3216, a third bracket 3217, and a third drive unit 3215. The third bracket 3217 is slidably mounted on the threaded rod 312, the bidirectional lead screw 3216 is rotatably mounted on the third bracket 3217, and the third drive unit 3215 is fixedly mounted on the third bracket 3217. The output end of the third drive unit 3215 is fixedly connected to the bidirectional lead screw 3216. The first slider 3211 and the second slider 3212 are slidably disposed on the bidirectional lead screw 3216. There are multiple X-shaped brackets 3213, and each X-shaped bracket 3213 is hinged to each other. The side of the X-shaped bracket 3213 close to the first slider 3211 and the second slider 3212 is hinged to the first slider 3211 and the second slider 3212, and the side of the X-shaped bracket 3213 away from the first slider 3211 and the second slider 3212 is hinged to the fixed frame 3214.

[0036] When it is necessary to adjust the height of the scraper 33 by adjusting the lifting mechanism, the bidirectional lead screw 3216 is rotated by the third drive unit 3215. The first slider 3211 and the second slider 3212 are provided with through holes for the bidirectional lead screw 3216 to pass through. The through holes are provided with threads that mesh with the bidirectional lead screw 3216. Therefore, while the bidirectional lead screw 3216 rotates, the first slider 3211 and the second slider 3212 move towards or away from each other, thereby realizing the retraction of the X-shaped bracket 3213. This causes the X-shaped bracket 3213 to drive the fixed frame 3214 to move up and down, thereby realizing the up and down movement of the scraper 33 driven by the fixed frame 3214.

[0037] See Figures 1 to 5 As shown, the compaction device 5 includes a first chain wheel assembly 51, a second chain wheel assembly 52, a fourth drive unit 53, a compaction roller 54, and a rotating shaft. The rotating shaft is rotatably mounted on the compaction box 2. The fourth drive unit 53 is fixedly mounted outside the compaction box 2. The output end of the fourth drive unit 53 is fixedly connected to the rotating shaft. One end of the compaction roller 54 is fixedly mounted on the first chain wheel assembly 51, and the other end of the compaction roller 54 is fixedly mounted on the second chain wheel assembly 52.

[0038] See Figures 1 to 5As shown, the first chain wheel assembly 51 and the second chain wheel assembly 52 have the same structure. Both the first chain wheel assembly 51 and the second chain wheel assembly 52 include a first sprocket, a second sprocket and a chain. The first sprocket is fixedly mounted on the rotating shaft, and the second sprocket is rotatably mounted on the crushing box 2. One end of the chain is sleeved on the first sprocket and the other side of the chain is sleeved on the second sprocket.

[0039] When the first chain wheel assembly 51 needs time to drive the crushing roller 54 to crush the material, the fourth drive unit 53 drives the rotating shaft to rotate. The rotating shaft drives the first sprocket to rotate at the same time. The first sprocket rotates through the chain drive, and the second sprocket rotates. The first chain drives the crushing roller 54 to rotate during the movement, thereby crushing and refining the material in the crushing box 2.

[0040] See Figures 1 to 5 As shown, the rolling roller 54 includes a rotating shaft and a rotating roller. One end of the rotating shaft is fixedly connected to the first chain wheel assembly 51, and the other end of the rotating shaft is fixedly connected to the second chain wheel assembly 52. ​​The rotating roller is rotatably mounted on the rotating shaft.

[0041] When the crushing roller 54 needs to crush the material, the first chain wheel assembly 51 drives the rotating shaft to move horizontally. During the movement, due to the mutual friction between the rotating roller and the coated sand, the rotating roller and the rotating shaft move and rotate at the same time, thereby crushing the material.

[0042] See Figures 1 to 4 As shown, the discharge mechanism 4 includes a first sliding plate 41, a second sliding plate 42, a baffle 43, and a pushing mechanism 44. The first sliding plate 41 and the second sliding plate 42 are mirror images of each other on the left and right sides of the crushing box 2. The baffle 43 is fixedly mounted on the extension plate, and the pushing mechanism 44 is fixed on the baffle 43.

[0043] When material needs to be discharged, the first sliding plate 41 and the second sliding plate 42 are manually pulled out from the compaction box 2, and the processed coated sand can be discharged by the pushing mechanism 44.

[0044] See Figure 3 As shown, the pushing mechanism 44 includes a first cylinder 441, a second cylinder 442 and a push plate 443. The first cylinder 441 and the second cylinder 442 are mirror images of each other on the baffle 43, and the push plate 443 is fixedly disposed at the output end of the first cylinder 441 and the second cylinder 442.

[0045] When material needs to be discharged, the push plate 443 is driven by the first cylinder 441 and the second cylinder 442 to move towards the compaction box 2, thereby enabling the push plate 443 to discharge the processed coated sand from the compaction box 2.

[0046] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A multi-stage refining and crushing device for coated sand regeneration, characterized in that, The device includes a crushing box (2), a crushing device (1) is fixedly installed on the top of the crushing box (2), a leveling device (3) is installed inside the crushing box (2), an extension plate is installed on the left side of the crushing box (2), the leveling device (3) includes a horizontal sliding mechanism (31), a lifting device (32) and a scraper (33), the horizontal sliding device is fixedly installed on the top inside the crushing box (2), the lifting device (32) is fixedly installed at the output end of the horizontal sliding device, the scraper (33) is fixedly installed at the output end of the lifting device (32), the crushing device (5) is fixedly installed on the left and right sides inside the crushing box (2), and the discharge mechanism (4) is fixedly installed on the extension plate of the crushing box (2). The rolling device (5) includes a first chain wheel assembly (51), a second chain wheel assembly (52), a fourth drive unit (53), a rolling roller (54), and a rotating shaft. The rotating shaft is rotatably mounted on the rolling box (2). The fourth drive unit (53) is fixedly mounted outside the rolling box (2). The output end of the fourth drive unit (53) is fixedly connected to the rotating shaft. One end of the rolling roller (54) is fixedly mounted on the first chain wheel assembly (51), and the other end of the rolling roller (54) is fixedly mounted on the second chain wheel assembly (52). The rolling roller (54) includes a rotating shaft and a rotating roller. One end of the rotating shaft is fixedly connected to the first chain wheel assembly (51), and the other end of the rotating shaft is fixedly connected to the second chain wheel assembly (52). The rotating roller is rotatably mounted on the rotating shaft.

2. The multi-stage refining and crushing device for coated sand regeneration according to claim 1, characterized in that, The crushing device (1) includes a crushing box (11), a first crushing mechanism (12), a second crushing mechanism (13), a pulley assembly (14), a first gear (16), a second gear (17), and a first drive unit (15). The crushing box (11) is fixedly installed on the top of the crushing box (2). The first crushing mechanism (12) and the second crushing mechanism (13) are mirror-rotated on the crushing box (11). The first gear (16) is fixedly installed on the first crushing mechanism (12). The second gear (17) is fixedly installed on the second gear (17). One end of the pulley assembly (14) is fixedly installed on the first crushing mechanism (12). The other end of the pulley assembly (14) is fixedly installed at the output end of the first drive unit (15). The first drive unit (15) is fixedly installed on the top of the crushing box (2).

3. The multi-stage refining and crushing device for coated sand regeneration according to claim 1, characterized in that, The horizontal sliding mechanism (31) includes a first bracket (311), a threaded rod (312), a second drive unit (313), a second bracket (314), and a stabilizer (315). The first bracket (311) and the second bracket (314) are mirror images of each other on the inner top of the compaction box (2). The threaded rod (312) is rotatably mounted on the first bracket (311). The second drive unit (313) is fixedly mounted on the first bracket (311). The output end of the second drive unit (313) is fixedly connected to the threaded rod (312). The stabilizer (315) is fixedly mounted on the second bracket (314).

4. The multi-stage refining and crushing device for coated sand regeneration according to claim 3, characterized in that, The lifting device (32) includes a first lifting mechanism (321) and a second lifting mechanism (322). The first lifting mechanism (321) is slidably mounted on the threaded rod (312), and the second lifting mechanism (322) is slidably mounted on the stabilizer rod (315).

5. The multi-stage refining and crushing device for coated sand regeneration according to claim 4, characterized in that, The first lifting mechanism (321) and the second lifting mechanism (322) have the same structure. Both the first lifting mechanism (321) and the second lifting mechanism (322) include a first slider (3211), a second slider (3212), an X-shaped bracket (3213), a fixed frame (3214), a bidirectional lead screw (3216), a third bracket (3217), and a third drive unit (3215). The third bracket (3217) is slidably mounted on the threaded rod (312), the bidirectional lead screw (3216) is rotatably mounted on the third bracket (3217), and the third drive unit (3215) is fixedly mounted on the third bracket (3217). The output end of the third drive unit (3215) is fixedly connected to the bidirectional lead screw (3216). The first slider (3211) and the second slider (3212) are slidably mounted on the bidirectional lead screw (3216). There are multiple X-shaped brackets (3213), and each X-shaped bracket (3213) is hinged to each other. The side of the X-shaped bracket (3213) close to the first slider (3211) and the second slider (3212) is hinged to the first slider (3211) and the second slider (3212), and the side of the X-shaped bracket (3213) away from the first slider (3211) and the second slider (3212) is hinged to the fixed frame (3214).

6. The multi-stage refining and crushing device for coated sand regeneration according to claim 1, characterized in that, The first sprocket assembly (51) and the second sprocket assembly (52) have the same structure. Both the first sprocket assembly (51) and the second sprocket assembly (52) include a first sprocket, a second sprocket and a chain. The first sprocket is fixedly mounted on the rotating shaft, and the second sprocket is rotatably mounted on the crushing box (2). One end of the chain is sleeved on the first sprocket, and the other side of the chain is sleeved on the second sprocket.

7. The multi-stage refining and crushing device for coated sand regeneration according to claim 1, characterized in that, The discharge mechanism (4) includes a first sliding plate (41), a second sliding plate (42), a baffle (43) and a pushing mechanism (44). The first sliding plate (41) and the second sliding plate (42) are mirror images of each other on the left and right sides of the crushing box (2). The baffle (43) is fixedly mounted on the extension plate. The pushing mechanism (44) is fixed on the baffle (43).

8. The multi-stage refining and crushing device for coated sand regeneration according to claim 7, characterized in that, The feeding mechanism (44) includes a first cylinder (441), a second cylinder (442) and a push plate (443). The first cylinder (441) and the second cylinder (442) are mirror images of each other on the baffle (43), and the push plate (443) is fixedly disposed at the output end of the first cylinder (441) and the second cylinder (442).

Images