A multi-stage crushing device for waste sand

Abstract

This invention relates to the technical field of waste sand crushing devices, specifically a multi-stage waste sand crushing device, comprising a base, a feeding assembly (equipped to rotate a conical block via a motor to shake the waste sand), a screening assembly (equipped to change the vertical position of the base and the inclination angle of the screening plate via the power of the motor to screen the waste sand), a coarse crushing assembly (equipped to rotate a connecting shaft via a motor to coarsely crush the waste sand), a return assembly (located to one side of the coarse crushing assembly, equipped to rotate a circular shaft via the power of the motor to transport the waste sand screened out by the screening assembly back to the coarse crushing assembly), and a fine crushing assembly (equipped to finely crush the waste sand). This invention employs a feeding assembly, a screening assembly, a coarse crushing assembly, a return assembly, and a fine crushing assembly, enabling simultaneous coarse and fine crushing of waste sand, and screening of the products from both crushing processes.

Description

Technical Field

[0001] This invention relates to the field of waste sand crushing equipment technology, specifically a multi-stage crushing waste sand crushing equipment. Background Technology

[0002] Waste sand crushing equipment can crush and process industrial waste sand, enabling it to be reused in industries such as construction and casting, achieving resource recycling, reducing the mining of new sand, and extracting valuable components from waste sand. It can reduce the pollution of waste sand to the environment, preventing its indiscriminate dumping or landfilling, which occupies land and pollutes soil and water sources. At the same time, the equipped dust removal equipment can reduce dust emissions, improve air quality, reduce the production costs of enterprises that generate waste sand, reduce the cost of purchasing new sand and the cost of waste sand disposal, improve the market competitiveness of enterprises, and drive the development of related equipment manufacturing, technical services and other industries, creating employment opportunities and economic growth points.

[0003] Chinese patent CN110000332A discloses a waste sand crushing and screening machine, which mainly solves the problem of synchronizing crushing and screening operations. During the rotation of the cylinder, the first crushing plate, the second crushing plate and the collision plate perform collision crushing operations, resulting in thorough crushing. Waste sand of qualified diameter is discharged into the material hood under the action of centrifugal force along the screen. Uncrushable waste residue is automatically discharged when the cylinder reverses.

[0004] However, existing technologies mostly involve direct quantitative crushing of waste sand in one or multiple stages, or adding a screening process after one or multiple crushing stages. But if waste sand is not crushed in multiple stages and screened multiple times, on the one hand, it will be difficult to guarantee the quality of waste sand. Uneven particle size will lead to unstable concrete performance and casting quality when used in industries such as construction and casting, and the scope of application will be greatly limited. At the same time, it will also aggravate equipment wear. Larger particles are prone to clogging equipment, and smaller particles are prone to accumulation, increasing maintenance costs and energy consumption. On the other hand, this will cause resource waste, with a large amount of waste sand being piled up or landfilled, and the useful components cannot be recovered.

[0005] Therefore, a multi-stage crushing waste sand crushing device is needed to solve the problem of low crushing and screening efficiency without multi-stage crushing and multiple screenings. Summary of the Invention

[0006] To address the problems of inconvenience in screening waste sand that has undergone multiple crushing processes, inconvenience in classifying waste sand after multiple screening processes, and high costs and energy consumption, this application provides a multi-stage crushing waste sand crushing device.

[0007] The technical solution of the present invention is: a multi-stage crushing waste sand crushing device, including a base.

[0008] Furthermore, the feeding assembly, located on the top of the base, is configured to rotate a conical block driven by a motor, thereby changing the vertical position of the connecting plate by the shape of the conical block. The connecting plate, via a guide rod, changes the vertical position of the screen plate to shake the waste sand. The feeding assembly includes a material shell fixed to the top of the base, a motor fixed to the top of the base, and the motor located on one side of the material shell. A transmission rod is rotatably installed through the material shell on the side closest to the motor, with both ends of the transmission rod located outside the material shell. One end of the transmission rod is fixedly connected to the output end of the motor. Two conical blocks are respectively fixed to the outer ends of the transmission rod. Two guide holes are respectively opened through the two sides of the material shell, and two guide holes are located on the same side of the transmission rod. Guide rods are placed inside the guide holes, and screen plates are fixed to the outside of the two guide rods, with the screen plates located inside the material shell. Connecting plates are fixed to the outside of the two guide rods near the motor, and another connecting plate is fixed to the outside of the other end of the two guide rods. Both connecting plates are located outside the material shell, and the tops of the two conical blocks are respectively attached to the bottoms of the two connecting plates. A set of fixed plates is fixed to both sides of the material shell, and two fixed plates form a set. The two sets of fixed plates are located on top of the two connecting plates. Two limiting rods are fixed to the top of each of the two connecting plates. All four limiting rods are located inside the four fixed plates. A spring is fixed to the bottom of each fixed plate, and the other end of each spring is fixed to the top of the connecting plate. All four springs are located outside the four limiting rods.

[0009] Furthermore, the screening component, located on top of the feeding component, is assembled to change the vertical position of the base via the power of motor one. The base moves the meshing frame vertically via telescopic rods, causing the gear to rotate the shaft, changing the inclination angle of the screening plate, and screening the waste sand. The screening component includes a screen shell, which is fixed to the top of the material shell. The shaft is rotatably mounted on the side of the screen shell near motor one. The gear is fixed to the outer side of the shaft near motor one. A limiting shell is fixed to the side of the screen shell near the gear. The base is fixed to the top of the connecting plate near motor one. Two telescopic rods are fixed to the top of the base. The meshing frame is fixed to the top of the output ends of the two telescopic rods. The inner side of the meshing frame meshes with the gear. The meshing frame is located inside the limiting shell. The screening plate is fixed to the outer side of the shaft.

[0010] Furthermore, a left groove is provided on the top of the screening plate, and a baffle is rotatably installed on the inner side of the left groove. A spring is fixed on the inner side of the baffle, and a plate is fixed on the other end of the spring. A movable shaft is rotatably installed on the inner side of the other end of the plate. A side groove is provided on the inner wall of the screen shell adjacent to the side near the gear. Movable grooves are provided on the inner walls of both sides of the side groove. The two ends of the movable shaft are located inside the two movable grooves.

[0011] Furthermore, a through groove is provided on the top of the screening plate, and the through groove and the left groove are symmetrically arranged on the top of the screening plate. A baffle is rotatably installed on the inner side of the through groove. A spring is fixed to the other end of the baffle, and a pull plate is fixed to the other end of the spring. The baffle is located inside the pull plate. A guide rod is rotatably installed on the inner side of the other end of the pull plate. Guide grooves are provided on the inner wall of the screen shell on the side close to the gear and on the inner wall opposite to the gear. The two ends of the guide rod are located inside the two guide grooves.

[0012] Furthermore, a coarse crushing component, located on top of the screening component, is assembled to coarsely crush waste sand by rotating a connecting shaft driven by motor two. The coarse crushing component includes a shell, which is fixed to the top of the screen shell. A feed hopper is fixed to the top of the shell. A support is fixed to one side of the shell. Motor two is fixed to the inner side of the support and is located on top of motor one. A support plate is fixed to the inner wall of one side of the shell, and a sealing plate is fixed to the inner wall of the other side of the shell. One connecting shaft is fixed to the inner side of the sealing plate, and another connecting shaft is placed inside the support plate. The output end of motor two is fixedly connected to one end of the connecting shaft inside the sealing plate. Side plates are fixed to both ends of the other connecting shaft. The two side plates are located outside the shell. Limiting rods are fixed to the side of the two side plates away from motor two. A fixed plate is slidably connected to the outer side of each limiting rod. The side of each fixed plate close to the shell is fixedly connected to the shell. The fixed plate and the side plate on the same side of the shell are connected by a spring, and the spring is located outside the limiting rod.

[0013] Furthermore, a double-groove pulley is fixed to the outside of the output end of motor two. Belt two is fitted in the groove of the double-groove pulley near the housing, and belt one is fitted in the groove of the double-groove pulley near motor two.

[0014] Furthermore, the return material assembly is located on top of the feeding assembly and on one side of the coarse crushing assembly. It is configured to rotate the round shaft driven by the power of motor two, so that the feeding belt transports the waste sand screened out by the screening assembly back to the coarse crushing assembly. The return material assembly includes a shell, which is fixed to the top of the material shell. Two round shafts are rotatably installed through one side of the shell. A single groove pulley is fixed to the outer side of the two round shafts near the motor two. The other end of belt one is fitted inside the single groove pulley near the shell. A feeding belt is fitted to the outer side of the two round shafts. The feeding belt is located inside the shell. A bottom shell is fixed inside the material shell. Another belt one is fitted to the outer side of the other single groove pulley.

[0015] Furthermore, the fine crushing component is located inside the feeding component. It is assembled so that the main shaft is driven to rotate by the power of the second motor, so that the pressure rollers can finely crush the waste sand. The fine crushing component includes a partition plate, which is fixed to the side of the material shell away from the bottom shell. Two main shafts are rotatably installed through one side of the material shell. Pressure rollers are fixed to the outer side of both main shafts. Another double-groove pulley is fixed to the outer side of the main shaft near the bottom shell and the end of the main shaft near the first motor. The other end of the second belt is fitted into the groove of the other double-groove pulley near the shell. The other end of the first belt is fitted into the groove of the other double-groove pulley near the first motor.

[0016] The beneficial effects of this invention are as follows:

[0017] (1) The multi-stage crushing waste sand device of the present invention employs a feeding component, a screening component, a coarse crushing component, a return component, and a fine crushing component. It can perform coarse and fine crushing of waste sand while simultaneously screening the products from both crushing processes. Compared with existing technologies, it optimizes the particle size distribution of waste sand, ensures uniform particle size, improves the quality of waste sand, and enables it to play a better role in many fields such as construction, casting, and glass manufacturing, expanding the application scope of waste sand, improving resource utilization, and achieving sustainable development. It can also reduce raw material procurement costs for enterprises, reduce equipment maintenance costs, and improve production efficiency. At the same time, this device can reduce waste sand accumulation and landfill, reducing negative environmental impacts.

[0018] (2) The multi-stage crushing waste sand crushing device of the present invention adopts a feeding component and a screening component, which not only optimizes the power structure, but also classifies the waste sand with different results after two crushings, thereby increasing the crushing effect.

[0019] (3) The multi-stage crushing waste sand crushing device of the present invention adopts a return material component. It uses the power of the fine crushing component and the coarse crushing component to crush the unqualified waste sand after coarse crushing again. This not only reduces the pressure of the fine crushing component, but also improves the utilization rate of waste sand and reduces costs. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure of a multi-stage crushing waste sand device provided by the present invention;

[0022] Figure 2 A schematic cross-sectional view of the overall structure of a multi-stage crushing waste sand device provided by the present invention;

[0023] Figure 3 A three-dimensional structural diagram of the return component of a multi-stage crushing waste sand device provided by the present invention;

[0024] Figure 4 for Figure 1 Enlarged view of point C;

[0025] Figure 5 A three-dimensional structural diagram of the screening component of a multi-stage crushing waste sand device provided by the present invention;

[0026] Figure 6 A schematic diagram of the material shell cross-section of a multi-stage crushing waste sand crushing device provided by the present invention;

[0027] Figure 7 A three-dimensional structural diagram of the feeding component of a multi-stage crushing waste sand device provided by the present invention;

[0028] Figure 8 for Figure 6 A magnified view of A;

[0029] Figure 9 for Figure 6 A magnified view of B;

[0030] Figure 10 A schematic diagram of the three-dimensional structure of a conical block in a multi-stage crushing waste sand crushing device provided by the present invention.

[0031] In the diagram: 1. Base; 2. Feeding assembly; 21. Material shell; 22. Motor 1; 23. Conical block; 24. Transmission rod; 25. Fixed plate; 251. Limiting rod; 26. Screen plate; 27. Connecting plate; 28. Guide rod; 29. ​​Guide hole; 3. Screening assembly; 31. Screen shell; 32. Rotating shaft; 33. Gear; 34. Meshing frame; 35. Telescopic rod; 36. Base; 37. Screening plate; 371. Left groove; 372. Baffle; 373. Insert plate; 374. Movable shaft; 375. Movable groove; 376. Side groove; 377. Through groove; 378. Baffle plate; 3 79. Pull plate; 3791. Guide rod; 3792. Guide groove; 38. Restriction shell; 4. Coarse crushing assembly; 41. Shell; 411. Bracket; 42. Motor II; 43. Coupling shaft; 44. Support plate; 45. Sealing plate; 46. Side plate; 47. Fixing plate; 48. Limiting rod; 49. Double groove pulley; 491. Belt I; 492. Belt II; 5. Feed hopper; 6. Return assembly; 61. Shell; 62. Round shaft; 63. Feeding belt; 64. Bottom shell; 65. Single groove pulley; 7. Fine crushing assembly; 71. Partition plate; 72. Main shaft; 73. Pressure roller. Detailed Implementation

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0033] Example: Figures 1-10 As shown, a multi-stage crushing waste sand crushing device includes a base 1;

[0034] Specifically, the coarse crushing component 4 is located on top of the screening component 3. It is assembled to coarsely crush the waste sand by rotating the connecting shaft 43 driven by the second motor 42. The coarse crushing component 4 includes a housing 41, which is fixed to the top of the screen shell 31. A feed hopper 5 is fixed to the top of the housing 41. A support 411 is fixed to one side of the housing 41. The second motor 42 is fixed to the inner side of the support 411 and is located on top of the first motor 22. A support plate 44 is fixed to the inner wall of one side of the housing 41, and a sealing plate 45 is fixed to the inner wall of the other side of the housing 41. A connecting shaft 43 is fixed to the inner side of the sealing plate 45. Another connecting shaft 43 is placed inside the support plate 44. The output end of the second motor 42 is fixedly connected to one end of the connecting shaft 43 inside the sealing plate 45. The two ends of the other connecting shaft 43 are respectively fixed with side plates 46. The two side plates 46 are located outside the housing 41. Limit rods 48 are fixed on the side of the two side plates 46 away from the second motor 42. A fixed plate 47 is slidably connected to the outside of each limit rod 48. The side of each fixed plate 47 close to the housing 41 is fixedly connected to the housing 41. The fixed plate 47 and the side plate 46 on the same side of the housing 41 are connected by a spring, and the spring is located outside the limit rod 48.

[0035] In this embodiment, the workers use mechanical equipment (such as transport vehicles or conveyor belts, which are existing technologies and will not be described in detail here) to transport the waste sand to be crushed to the inside of the feed hopper 5. Then, the unloading equipment (such as containers or conveyor belts) is installed inside the base 1. Then, the motor 1 22 and the motor 2 42 are started. The output end of the motor drives the connecting shaft 43 to rotate forward. The waste sand to be crushed is guided by the feed hopper 5 to move to the inside of the two connecting shafts 43. The two connecting shafts 43 squeeze and crush the waste sand for preliminary coarse crushing.

[0036] If the waste sand is transported too fast, causing the waste sand to accumulate on top of the two connecting shafts 43, the connecting shaft 43 fixedly connected to the second motor 42 will squeeze the other connecting shaft 43 through the waste sand. The other connecting shaft 43 will move along the inner side of the support plate 44 away from the connecting shaft 43 fixedly connected to the second motor 42. The connecting shaft 43 will squeeze the spring through the two side plates 46. The two side plates 46 will push the two limit rods 48 to move along the inner side of the two side plates 46 away from the connecting shaft 43, thereby increasing the distance between the two connecting shafts 43. After clearing the blockage, the two springs will push the two side plates 46. The two side plates 46 will drive the other connecting shaft 43 to move along the inner side of the support plate 44 towards the side of the connecting shaft 43 fixedly connected to the second motor 42, thereby restoring the two connecting shafts 43 to their original positions and preventing the coarse crushing component 4 from being blocked.

[0037] Specifically, the screening component 3 is located on top of the feeding component 2. It is configured to change the vertical position of the base 36 via the power of the motor 22. The base 36 drives the meshing frame 34 to move vertically via the telescopic rod 35, causing the gear 33 to drive the rotating shaft 32 to rotate, changing the inclination angle of the screening plate 37, and screening the waste sand. The screening component 3 includes a screen shell 31, which is fixed to the top of the material shell 21. The rotating shaft 32 is rotatably mounted on the screen shell 31 near the motor 22. On one side of 2, gear 33 is fixed to the outer side of the rotating shaft 32 near the motor 22. A limiting shell 38 is fixed to the side of the screen shell 31 near gear 33. The base 36 is fixed to the top of the connecting plate 27 near motor 22. Two telescopic rods 35 are fixed to the top of the base 36. The meshing frame 34 is fixed to the top of the output end of the two telescopic rods 35. The inner side of the meshing frame 34 meshes with gear 33. The meshing frame 34 is located inside the limiting shell 38. The screening plate 37 is fixed to the outer side of the rotating shaft 32.

[0038] Specifically, a left groove 371 is provided on the top of the screening plate 37, and a baffle 372 is rotatably installed on the inner side of the left groove 371. A spring is fixed on the inner side of the baffle 372, and a plate 373 is fixed on the other end of the spring. A movable shaft 374 is rotatably installed on the inner side of the other end of the plate 373. A side groove 376 is provided on the inner wall of the screen shell 31 adjacent to the side near the gear 33. Movable grooves 375 are provided on the inner walls of both sides of the side groove 376. The two ends of the movable shaft 374 are located inside the two movable grooves 375.

[0039] Specifically, a through groove 377 is provided on the top of the screening plate 37, and the through groove 377 and the left groove 371 are symmetrically arranged on the top of the screening plate 37. A baffle 378 is rotatably installed on the inner side of the through groove 377. A spring is fixed to the other end of the baffle 378, and a pull plate 379 is fixed to the other end of the spring. The baffle 378 is located inside the pull plate 379. A guide rod 3791 is rotatably installed on the inner side of the other end of the pull plate 379. Guide grooves 3792 are provided on the inner wall of the screen shell 31 on the side close to the gear 33 and on the inner wall opposite to the gear 33. The two ends of the guide rod 3791 are located inside the two guide grooves 3792.

[0040] In this embodiment, after the preliminary crushed waste sand falls to the top of the screening plate 37, the output end of the motor 22 drives the conical block 23 to rotate via the transmission rod 24. During the 180-degree rotation of the conical block 23, the conical block 23 pushes the connecting plate 27 to move towards the top of the device. The connecting plate 27 pushes the base plate to move closer to the top of the device. The base plate pushes the meshing frame 34 to move closer to the top of the device via the telescopic rod 35. The meshing frame 34 drives the rotating shaft 32 to rotate clockwise through the meshing action. The rotating shaft 32 drives the screening plate 37 to rotate clockwise. The screening plate 37 drives the baffle 372 and the insert plate 373 to rotate in reverse around the movable shaft 374, releasing the blockage on the left side of the screening plate 37. The screening plate 37 drives the pull plate 379 and the baffle 378 to rotate in the forward direction around the rotating shaft 32. The pull plate 379 drives the guide rod 3791 to move along the inside of the guide groove 3792 toward the top of the device. The guide rod 3791 drives the pull plate 379 to move away from the baffle 378. At this time, the spring inside the pull plate 379 is stretched, and the coarsely crushed qualified waste sand passes through the left side of the screening plate 37 and enters the fine crushing component 7.

[0041] During the rotation of the conical block 23 from 180 degrees to 360 degrees, the connecting plate 27 moves towards the bottom of the device. The connecting plate 27 pulls the base plate towards the bottom of the device. The base plate pulls the meshing frame 34 towards the bottom of the device through the telescopic rod 35. The meshing frame 34 drives the rotating shaft 32 to reverse through meshing. The rotating shaft 32 drives the screening plate 37 to reverse. The screening plate 37 drives the baffle 372 and the insert plate 373 to rotate clockwise around the movable shaft 374 until the baffle 372 and the insert plate 373 return to their original positions. The pulling plate 379 and the baffle plate 378 rotate clockwise around the rotating shaft 32 and return to their original positions. The pulling plate 379 drives the guide rod 3791 to return to its original position along the inner side of the guide groove 3792. This process is repeated so that the coarsely crushed qualified sand continuously enters the fine crushing component 7, while the coarsely crushed unqualified waste sand remains on the top of the screening plate 37.

[0042] When the coarse crushing of waste sand is completed or there is too much unqualified waste sand from the top of the screening plate 37, the feeding of waste sand into the feed hopper 5 is stopped. The operator controls the device to return to its initial position via motor 22 and motor 42, and then controls the two telescopic rods 35 to retract. The two telescopic rods 35 drive the meshing frame 34 to move towards the side closer to the base 36. When the output end of the two telescopic rods 35 retracts to its limit, the telescopic rods 35 pull the meshing frame 34 towards the bottom of the device. The meshing frame 34 drives the rotating shaft 32 to reverse through meshing. The rotating shaft 32 drives the screening plate 37 to reverse. The screening plate 37 drives the baffle 372 and the insert plate 373 to reverse around the rotating shaft 32. The insert plate 373 drives the movable shaft 374 to move along the inner side of the movable groove 375 towards the top of the device. Finally, the movable shaft 374 is located at the top of the movable groove 375. Pull the panel 373 to move away from the baffle 372. At this time, the spring inside the baffle 372 is stretched. The screening plate 37 drives the baffle 378 and the pull plate 379 to rotate in reverse around the guide rod 3791. When the guide rod 3791 moves to contact the top wall of the guide groove 3792, the spring inside the baffle 378 is stretched to the limit, and a through hole is formed between the baffle 378 and the pull plate 379. Then, start the motor 1 22 and the motor 2 42. The screening plate 37 returns to its initial state during the rotation of the cone block 23 by 180 degrees, and then closes the through hole between the baffle 378 and the pull plate 379. During the rotation of the cone block 23 from 180 degrees to 360 degrees, the screening plate 37 opens the through hole between the baffle 378 and the pull plate 379 again. Unqualified waste sand enters the inside of the bottom shell 64 through this through hole and enters the return material assembly 6, thereby completing the classification of the coarsely crushed waste sand.

[0043] Specifically, the feeding assembly 2 is located on the top of the base 1. It is assembled to rotate the conical block 23 driven by the motor 22, thereby changing the vertical position of the connecting plate 27 by the shape of the conical block 23. The connecting plate 27 changes the vertical position of the screen plate 26 through the guide rod 28 to shake the waste sand. The feeding assembly 2 includes a material shell 21, which is fixed to the top of the base 1. The motor 22 is fixed to the top of the base 1 and is located on one side of the material shell 21. A transmission rod 24 is rotatably installed through the side of the material shell 21 near the motor 22, and both ends of the transmission rod 24 are located outside the material shell 21. One end of the transmission rod 24 is fixedly connected to the output end of the motor 22. Two conical blocks 23 are respectively fixed to the outside of the two ends of the transmission rod 24. Two guide holes 29 are respectively opened through the two sides of the material shell 21. The two guide holes are located on the same side of the transmission rod 24. Guide rods 28 are placed on the inner side of the material shell 21. Screen plates 26 are fixed on the outer side of the two guide rods 28 and are located inside the material shell 21. Connecting plates 27 are fixed on the outer side of the two guide rods 28 near the motor 22. Another connecting plate 27 is fixed on the outer side of the other end of the two guide rods 28. Both connecting plates 27 are located outside the material shell 21. The tops of the two conical blocks 23 are respectively attached to the bottoms of the two connecting plates 27. A set of fixed plates 25 are fixed on both sides of the material shell 21. Two fixed plates 25 are a set. The two sets of fixed plates 25 are located on the top of the two connecting plates 27. Two limiting rods 251 are fixed on the top of the two connecting plates 27. The four limiting rods 251 are located inside the four fixed plates 25. A spring is fixed at the bottom of each fixed plate 25. The other end of each spring is fixed to the top of the connecting plate 27. The four springs are located outside the four limiting rods 251.

[0044] In this embodiment, as the motor drives the two conical blocks 23 to rotate 180 degrees via the transmission rod 24, the two conical blocks 23 push the two connecting plates 27 to move towards the top of the device. Simultaneously, the two connecting plates 27 compress the spring, causing the limiting rod 251 to move along the inner side of the fixed plate 25 towards the top of the device. The two connecting plates 27, via the two guide rods 28, move along the inner side of the guide hole 29 towards the top of the device, simultaneously causing the screen plate 26 to move towards the top of the device. During the rotation of the conical blocks 23 from 180 degrees to 360 degrees... The spring presses the two connecting plates 27, which in turn drive the limiting rod 251 to move along the inner side of the fixed plate 25 toward the bottom of the device. The two connecting plates 27 move along the inner side of the guide hole 29 through the two guide rods 28 toward the bottom of the device, while simultaneously driving the screen plate 26 to move toward the bottom of the device. This causes the screen plate 26 to shake, so that the screen plate 26 can screen the finely crushed waste sand again. The finely crushed waste sand that does not meet the requirements accumulates on the inner side of the screen plate 26, while the finely crushed waste sand that meets the requirements passes through the screen plate 26 and falls into the inner side of the feeding device on the inner side of the base 1.

[0045] Specifically, the return material assembly 6 is located on top of the feeding assembly 2 and on one side of the coarse crushing assembly 4. It is configured to rotate the round shaft 62 driven by the power of the second motor 42, so that the feeding belt 63 transports the waste sand screened out by the screening assembly 3 back to the coarse crushing assembly 4. The return material assembly 6 includes a housing 61, which is fixed to the top of the shell 21. Two round shafts 62 are rotatably installed through one side of the housing 61. A single groove pulley 65 is fixed to the outer side of the two round shafts 62 near the second motor 42. The other end of the belt 491 is fitted inside the single groove pulley 65 near the housing 41. The feeding belt 63 is fitted to the outer side of the two round shafts 62. The feeding belt 63 is located inside the housing 61. A bottom shell 64 is fixed inside the shell 21. Another belt 491 is fitted to the outer side of the other single groove pulley 65.

[0046] In this embodiment, motor 42 causes double-groove pulleys 49 to rotate in the same direction via belt 492. The two double-groove pulleys 49 drive two round shafts 62 to rotate in the forward direction via belts 491 and single-groove pulleys 65. The two round shafts 62 drive the feeding belt 63 to rotate in the forward direction, transporting the waste sand that enters the inner side of the bottom shell 64 to the bottom of the top wall of the outer shell 61. By inertia, the unqualified waste sand is thrown into the inner side of the feed hopper 5 for coarse crushing again.

[0047] Specifically, the fine crushing component 7 is located inside the feeding component 2. It is assembled so that the main shaft 72 is driven to rotate by the power of the second motor 42, so that the pressure roller 73 can finely crush the waste sand. The fine crushing component 7 includes a partition 71, which is fixed to the side of the material shell 21 away from the bottom shell 64. Two main shafts 72 are rotatably installed through one side of the material shell 21. Pressure rollers 73 are fixed to the outer side of both main shafts 72. Another double groove pulley 49 is fixed to the outer side of the main shaft 72 near the bottom shell 64 and the first motor 22. The other end of the second belt 492 is fitted into the groove of the other double groove pulley 49 near the shell 41. The other end of the first belt 491 is fitted into the groove of the other double groove pulley 49 near the motor 22.

[0048] In this embodiment, after entering the fine crushing component 7, the motor 42 causes the double-groove pulley 49 to rotate in the same direction via the belt 492, which in turn causes the main shaft 72 to drive the pressure roller 73 to finely crush the coarsely crushed waste sand. The finely crushed waste sand falls to the inner side of the screen plate 26.

[0049] Working principle: Initial state as follows Figures 1-10 As shown, the workers use mechanical equipment (such as transport vehicles or conveyor belts, which are existing technologies and will not be described in detail here) to transport the waste sand to be crushed to the inside of the feed hopper 5. Then, the feeding equipment (such as containers or conveyor belts) is installed inside the base 1. Then, the motor 1 22 and motor 2 42 are started, and the two shafts 43 squeeze and crush the waste sand to perform preliminary coarse crushing.

[0050] After the waste sand after preliminary crushing falls to the top of the screening plate 37, the output end of the motor 22 drives the conical block 23 to rotate through the transmission rod 24. During the rotation of the conical block 23 by 180 degrees, the rotating shaft 32 drives the screening plate 37 to rotate forward. The screening plate 37 drives the baffle 372 and the insert plate 373 to rotate in reverse around the movable shaft 374, releasing the blockage on the left side of the screening plate 37. The qualified waste sand from the coarse crushing passes through the left side of the screening plate 37 and enters the fine crushing component 7.

[0051] During the rotation of the conical block 23 from 180 degrees to 360 degrees, the connecting plate 27 moves toward the bottom of the device. The screening plate 37 drives the baffle 372 and the insert plate 373 to rotate clockwise around the movable shaft 374 until the baffle 372 and the insert plate 373 return to their original positions. The pull plate 379 and the baffle 378 rotate clockwise around the rotating shaft 32 and return to their original positions. The pull plate 379 drives the guide rod 3791 to return to its original position along the inner side of the guide groove 3792. This process is repeated so that the coarsely crushed qualified sand continuously enters the fine crushing component 7, while the coarsely crushed unqualified waste sand remains on the top of the screening plate 37.

[0052] When the coarse crushing of waste sand is completed or there is too much unqualified waste sand at the top of the screening plate 37, the feeding of waste sand into the feed hopper 5 is stopped. The operator controls the device to return to its initial position via motor 22 and motor 42, then controls the two telescopic rods 35 to retract, forming a through hole between the baffle plate 378 and the pull plate 379. Then, motors 22 and 42 are started, and the screening plate 37 returns to its initial state as the conical block 23 rotates 180 degrees, thereby closing the through hole between the baffle plate 378 and the pull plate 379. The screening plate 37 rotates 180 degrees to... During the 360-degree process, the through hole between the baffle 378 and the pull plate 379 is opened again. The unqualified waste sand enters the inner side of the bottom shell 64 through this through hole and enters the return material assembly 6. The motor 42 drives the double groove pulley 49 to rotate in the same direction through the belt 492. The two double groove pulleys 49 drive the two round shafts 62 to rotate in the forward direction through the two belts 491 and the two single groove pulleys 65. The two round shafts 62 drive the feeding belt 63 to rotate in the forward direction, transporting the waste sand that has entered the inner side of the bottom shell 64 to the bottom of the top wall of the outer shell 61. The unqualified waste sand is thrown into the inner side of the feed hopper 5 by inertia and is coarsely crushed again.

[0053] After entering the fine crushing component 7, the motor 42 drives the double groove pulley 49 to rotate in the same direction via the belt 492, which in turn drives the pressure roller 73 to finely crush the waste sand after coarse crushing. The finely crushed waste sand falls to the inside of the screen plate 26. During the rotation of the two conical blocks 23 driven by the motor via the transmission rod 24, the screen plate 26 vibrates, causing the screen plate 26 to screen the finely crushed waste sand again. The finely crushed qualified waste sand passes through the screen plate 26 and falls to the inside of the feeding device inside the base 1.

[0054] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any 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 multi-stage waste sand crushing device, comprising a base (1), characterized in that: It also includes a feeding component (2), which is set on the top of the base (1). It is assembled to drive the conical block (23) to rotate by a motor (22), and change the vertical position of the connecting plate (27) by the shape of the conical block (23). The connecting plate (27) changes the vertical position of the screen plate (26) through the guide rod (28) to shake the waste sand. The feeding assembly (2) includes a material shell (21), which is fixed to the top of the base (1). A motor (22) is fixed to the top of the base (1) and is located on one side of the material shell (21). A transmission rod (24) is rotatably installed on the side of the material shell (21) near the motor (22). Both ends of the transmission rod (24) are located outside the material shell (21). One end of the transmission rod (24) is fixedly connected to the output end of the motor (22). Two conical blocks (23) are fixed to the outer sides of the two ends of the transmission rod (24). Two guide holes (29) are opened through the two sides of the material shell (21). Guide rods (28) are placed inside the two guide holes (29) on the same side of the transmission rod (24). A screen plate (26) is fixed to the outer side of the two guide rods (28). The screen plate (26) is located on the material shell (21). Inside the shell (21), two guide rods (28) are fixed with connecting plates (27) on the outer side of one end of the motor (22), and another connecting plate (27) is fixed on the outer side of the other end of the two guide rods (28). Both connecting plates (27) are located outside the shell (21), and the tops of the two cone blocks (23) are respectively attached to the bottoms of the two connecting plates (27). Both sides of the shell (21) are fixed with a set of fixed plates (25), and the two fixed plates (25) are a set. The two sets of fixed plates (25) are located on the tops of the two connecting plates (27). The tops of the two connecting plates (27) are fixed with two limiting rods (251). The four limiting rods (251) are located inside the four fixed plates (25). The bottom of each fixed plate (25) is fixed with a spring. The other end of each spring is fixed to the top of the connecting plate (27). The four springs are located outside the four limiting rods (251). The screening assembly (3) is located on top of the feeding assembly (2). It is assembled to change the vertical position of the base (36) through the power of the motor (22). The base (36) drives the meshing frame (34) to move vertically through the telescopic rod (35), so that the gear (33) drives the rotating shaft (32) to rotate, changing the inclination angle of the screening plate (37) to screen the waste sand. The screening assembly (3) includes a screen shell (31), which is fixed to the top of the material shell (21). The rotating shaft (32) is rotatably installed through the screen shell (31) on the side near the motor (22). The gear (33) is fixed to the top of the material shell (21). The rotating shaft (32) is located on the outer side of one end near the motor (22). A limiting shell (38) is fixed on the side of the screen shell (31) near the gear (33). The base (36) is fixed to the top of the connecting plate (27) near the motor (22). Two telescopic rods (35) are fixed to the top of the base (36). The meshing frame (34) is fixed to the top of the output end of the two telescopic rods (35). The inner side of the meshing frame (34) meshes with the gear (33). The meshing frame (34) is located inside the limiting shell (38). The screening plate (37) is fixed to the outer side of the rotating shaft (32). A left groove (371) is opened on the top of the screening plate (37). A baffle (372) is rotatably mounted inside the groove (371). A spring is fixed inside the baffle (372). A plate (373) is fixed at the other end of the spring. A movable shaft (374) is rotatably mounted inside the other end of the plate (373). A side groove (376) is provided on the inner wall of the screen shell (31) adjacent to the side near the gear (33). Movable grooves (375) are provided on the inner walls of the two sides of the side groove (376). The two ends of the movable shaft (374) are located inside the two movable grooves (375). A through groove (377) is provided on the top of the screening plate (37). The through groove (377) is connected to the left groove. (371) Symmetrically arranged on the top of the screening plate (37), a baffle (378) is rotatably installed on the inner side of the through groove (377), a spring is fixed at the other end of the baffle (378), a pull plate (379) is fixed at the other end of the spring, and the baffle (378) is located inside the pull plate (379). A guide rod (3791) is rotatably installed on the inner side of the other end of the pull plate (379). Guide grooves (3792) are opened on the inner wall of the screen shell (31) on the side close to the gear (33) and on the inner wall opposite to the gear (33). The two ends of the guide rod (3791) are located inside the two guide grooves (3792). The coarse crushing component (4) is set on top of the screening component (3) and is assembled to coarsely crush the waste sand by rotating the connecting shaft (43) driven by the second motor (42); The return component (6) is set on top of the feeding component (2) and located on one side of the coarse crushing component (4). It is assembled to drive the round shaft (62) to rotate through the power of the motor (42), so that the feeding belt (63) transports the waste sand screened out by the screening component (3) back to the coarse crushing component (4). The fine crushing component (7) is located inside the feeding component (2). It is assembled so that the main shaft (72) is driven to rotate by the power of the second motor (42), so that the pressure roller (73) can finely crush the waste sand.

2. The multi-stage comminuted spent sand breaking device of claim 1, wherein: The coarse crushing component (4) includes a housing (41), which is fixed to the top of the screen shell (31). A feed hopper (5) is fixed to the top of the housing (41). A bracket (411) is fixed to one side of the housing (41). A second motor (42) is fixed to the inside of the bracket (411) and is located on top of the first motor (22). A support plate (44) is fixed to the inner wall of one side of the housing (41), and a sealing plate (45) is fixed to the inner wall of the other side of the housing (41). One connecting shaft (43) is fixed to the inside of the sealing plate (45), and another connecting shaft (43) is placed inside the support plate (44). The second motor (42) is fixed to the inner wall of the screen shell (31). The output end of 42) is fixedly connected to one end of the connecting shaft (43) inside the sealing plate (45). The two ends of the other connecting shaft (43) are respectively fixed with side plates (46). The two side plates (46) are located outside the housing (41). The side of the two side plates (46) away from the motor (42) is fixed with a limit rod (48). The outer side of each limit rod (48) is slidably connected with a fixed plate (47). The side of each fixed plate (47) close to the housing (41) is fixedly connected to the housing (41). The fixed plate (47) and the side plate (46) on the same side of the housing (41) are connected by a spring, and the spring is located outside the limit rod (48).

3. The multi-stage comminuted spent sand breaking device of claim 2, wherein: A double-groove pulley (49) is fixed on the outer side of the output end of the second motor (42). A second belt (492) is fitted in the groove of the double-groove pulley (49) near the housing (41), and a first belt (491) is fitted in the groove of the double-groove pulley (49) near the second motor (42).

4. The multi-stage crushing waste sand crushing device as described in claim 3, characterized in that: The return material assembly (6) includes a housing (61), which is fixed to the top of the material shell (21). Two round shafts (62) are rotatably installed on one side of the housing (61). A single groove pulley (65) is fixed to the outer side of the end of the two round shafts (62) near the motor (42). The other end of the belt (491) is fitted inside the single groove pulley (65) near the housing (41). A feeding belt (63) is fitted to the outer side of the two round shafts (62). The feeding belt (63) is located inside the housing (61). A bottom shell (64) is fixed to the inner side of the material shell (21). Another belt (491) is fitted to the outer side of the other single groove pulley (65).

5. The multi-stage comminuted spent sand breaking device of claim 4, wherein: The fine crushing component (7) includes a partition (71) fixed to the side of the material shell (21) away from the bottom shell (64). Two main shafts (72) are rotatably installed through one side of the material shell (21). Pressure rollers (73) are fixed to the outer side of both main shafts (72). Another double groove pulley (49) is fixed to the outer side of the main shaft (72) near the bottom shell (64) near the motor (22). The other end of the second belt (492) is fitted into the groove of the other double groove pulley (49) near the shell (41). The other end of the first belt (491) is fitted into the groove of the other double groove pulley (49) near the motor (22).

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