Gravel device based on granite aggregate and construction method

Abstract

The invention discloses an aggregate stone crushing device based on granite, and relates to the technical field of granite crushing devices, the aggregate stone crushing device comprises a machine body bearing frame, and a granite crushing structure is arranged at the upper end of the machine body bearing frame. According to the granite aggregate and stone crushing device, in the rotating process of a conical sorting disc in a material separation structure, granite crushed aggregates meeting the particle size requirement are collected towards the center through the centrifugal effect, large materials are thrown to the edge, and through cooperation of an avoiding groove formed in the side wall of a sorting bin and a fixed top flow guide plate, the granite crushed aggregates meeting the particle size requirement are separated; and large materials can be effectively separated and guided out. More importantly, the central flow guide structure located in the middle forms a dynamic flow guide channel through the rotating central flow guide plate, falling materials are forcibly guided to be evenly dispersed, and the technical problem that in a traditional device, the materials are prone to accumulation and bridging in a bin, and consequently blockage is caused is thoroughly solved. And the process from feeding, pre-sorting to fed material crushing is ensured to be smooth and unobstructed.

Description

A Granite Aggregate Crushing Device and Construction Method Technical Field

[0001] This invention relates to the field of granite crushing devices, and in particular to a granite aggregate crushing device. Background Technology

[0002] Granite crushing equipment is a specialized crushing device for processing hard rocks such as granite. It is widely used in mining, building materials, highways, railways, and water conservancy projects, capable of crushing large pieces of granite into aggregates that meet requirements. Its working principle is mainly based on impact energy or compression principles. Through the interaction of a high-speed rotating rotor, hammer, or moving jaw with a fixed jaw, the material is impacted, collided, and compressed, ultimately crushing it into cubic particles. A granite crushing device, as described in Chinese Patent Publication No. CN120243231A, includes a crusher and a receiving mechanism. The crusher includes a casing and multiple sets of crushing components arranged vertically within the casing, with filter rings between adjacent crushing components. The granite aggregates processed by the multiple crushing components have different particle sizes. The receiving mechanism includes a collecting component and a return component. The collecting component screens granite aggregates that meet requirements and transports excessively large aggregates to the return component, which then returns these aggregates to the crushing components for reprocessing. This application facilitates the simultaneous production of granite aggregates of different particle sizes, which is beneficial to improving the production efficiency of granite aggregates.

[0003] However, materials are prone to accumulation or blockage during crushing and conveying, affecting the smoothness of continuous operation. At the same time, the efficiency of the screening structure may be limited, which can easily lead to screen blockage or inaccurate grading. Furthermore, the overall structure of the device may not be optimized in coordinating crushing, separation and screening functions, resulting in problems such as inconvenient maintenance or high energy consumption. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a granite aggregate crushing device, comprising a machine body support frame, a granite crushing structure at the upper end of the machine body support frame, a material separation structure at the upper end of the granite crushing structure, a central guide structure in the middle of the material separation structure and the granite crushing structure, and a grading and screening structure at the bottom end of the granite crushing structure; the granite crushing structure includes a machine body crushing barrel fixedly disposed at the center of the machine body support frame; the machine body crushing barrel includes a diversion chamber fixedly connected to the machine body support frame, and a sorting chamber and a crushing chamber respectively disposed at the upper and lower ends of the machine body support frame.

[0005] Preferably, the granite crushing structure includes a bottom positioning frame fixedly installed at the bottom of the crushing chamber, a top positioning frame fixedly connected to the top of the sorting chamber, and a central drive shaft rotatably installed at the center of the bottom positioning frame and the top positioning frame.

[0006] Preferably, a conical crushing roller is fixedly connected to the surface of the central drive shaft, a driven bevel gear is fixedly connected to the bottom surface of the conical crushing roller, a motor positioning plate is fixedly connected to the side of the crushing chamber, a reduction motor is fixedly connected to the surface of the motor positioning plate, a drive shaft is rotatably connected to the drive end of the reduction motor, and a transmission bevel gear is fixedly connected to the end of the drive shaft away from the reduction motor, and the transmission bevel gear meshes with the driven bevel gear.

[0007] Preferably, the conical crushing roller is disposed inside the crushing chamber, and the central drive shaft is eccentrically disposed with respect to the conical crushing roller.

[0008] Preferably, the surface of the drive shaft is fitted with a shaft protective sleeve, and the shaft protective sleeve is fixedly connected to the surface of the motor positioning plate.

[0009] Preferably, the material separation structure includes a top protective cover fixedly installed on the surface of the top positioning frame, an avoidance groove is provided on the surface of the sorting bin, a top guide plate is fixedly connected inside the avoidance groove, and a sorting disc is fixedly connected to the surface of the central drive shaft, the sorting disc being located at the upper end of the top guide plate.

[0010] Preferably, the surface of the top protective cover has a feeding opening, the sorting disc is tapered with a narrow top and a wide bottom, and the sorting disc is located inside the sorting chamber.

[0011] Preferably, the central flow guiding structure includes a central sleeve fixedly disposed on the surface of the central drive shaft, with an annular rotating sleeve disposed on the outer ring of the central sleeve, and central flow guiding plates fixedly connected to the surface of the central sleeve in an annular array. The side of the central flow guiding plate far away from the central sleeve is fixedly connected to the annular rotating sleeve, and multiple flow guiding channels are formed between the multiple central flow guiding plates.

[0012] Preferably, the bottom surface of the bottom positioning frame is fixedly connected with connecting blocks in a circular array. A conical screening disc is fixedly connected to the bottom end of each connecting block. A conical backflow disc is fixedly connected to the bottom end of the conical screening disc. A conveying bucket is fixedly connected to the center of the conical screening disc and the conical backflow disc. A bottom transmission disc is fixedly connected to the bottom end of the central transmission shaft. A positioning shaft is symmetrically fixedly connected to the surface of the bottom transmission disc. A connecting arm is rotatably connected to the surface of the positioning shaft. A striking hammer is fixedly connected to the end of the connecting arm away from the positioning shaft. The striking hammer is in close contact with the surface of the conical screening disc. A torsion spring is sleeved on the surface of the positioning shaft. The two ends of the torsion spring are fixedly connected to the bottom transmission disc and the connecting arm, respectively.

[0013] A method for crushing granite aggregate includes: S1, starting the device and turning on the geared motor (16), which drives the central drive shaft (12) to rotate through the transmission system, thereby driving the sorting disc (21), the central guide plate (25), the conical crushing roller (13) and the bottom drive disc (30) to operate synchronously, providing power for the entire crushing and screening process; S2, feeding materials, feeding the granite crushed stone to be processed into the sorting bin (8) through the feed inlet of the top protective cover (20); S3, pre-separating the materials, the rotating conical sorting disc (21) uses centrifugal force to make the crushed material that meets the particle size requirements gather towards the center and fall, while larger pieces of material are thrown to the edge and pass through the clearance groove (3) on the side wall of the sorting bin (8). 5) and fixed top guide plate (22) guide and discharge; S4, central guide anti-blocking, the falling material enters the diversion chamber (7), the dynamic guide channel formed by the rotating central guide plate (25) forcibly disperses the material, prevents it from accumulating or bridging in the chamber, and ensures that the material enters the crushing chamber (9) below evenly and smoothly; S5, compression crushing and screening, the material is crushed by the eccentrically set conical crushing roller (13) in the crushing chamber (9); the crushed material falls onto the conical screening plate (27), the bottom transmission plate (30) rotates and drives the hammer (33) to periodically strike the screen plate, generate vibration for efficient screening, fine material passes through the screen and is discharged, larger particles gather towards the center and are discharged through the conveying bucket (29).

[0014] In summary, this invention provides a granite aggregate crushing device with the following advantages: 1. In this granite aggregate crushing device, the conical sorting disc in the material separation structure, during rotation, utilizes centrifugal force to gather granite fragments that meet the particle size requirements towards the center, while larger pieces are thrown to the edge. Combined with the clearance grooves on the side wall of the sorting bin and the fixed top guide plate, large pieces of material are effectively separated and discharged. More importantly, the central guide structure located in the middle forms a dynamic guide channel through the rotating central guide plate, forcibly guiding the falling material to disperse evenly. This completely solves the technical problem of material accumulation and bridging in the bin, leading to blockages, in traditional devices, ensuring a smooth and unobstructed process from feeding and pre-sorting to crushing.

[0015] 2. The core of the grading and screening structure of this granite aggregate crushing device is a conical screening disc, which is fixed to the bottom by a connecting block. When the central drive shaft drives the bottom drive disc to rotate, the symmetrically arranged hammers periodically strike the inner surface of the conical screening disc under the combined action of centrifugal force and torsion spring. This continuous and flexible striking generates high-frequency micro-vibration, which can not only effectively prevent fine materials from adhering and clogging the screen, but also allow the material to jump and roll fully on the screen surface, thereby greatly improving the screening throughput and the grading accuracy of aggregates of different particle sizes, and realizing the immediate and efficient separation of crushed materials.

[0016] 3. This granite aggregate crushing device is centered around a single central drive shaft, which drives the sorting disc, central guide plate, conical crushing roller, and bottom impact vibration mechanism in series from top to bottom. This design eliminates multiple independent motors and transmission systems, resulting in a compact mechanical structure and extremely high coordination. The eccentrically positioned conical crushing roller achieves efficient compression crushing under the drive of a single geared motor. The integrated design not only reduces the equipment's footprint and energy consumption from multiple power sources but also significantly reduces potential failure points caused by complex transmission chains. This makes daily maintenance, inspection, and upkeep more centralized and convenient, and the overall operational reliability and economy are significantly superior to traditional multi-stage split crushing and screening equipment. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the overall planar structure of the present invention; Figure 3 is a schematic diagram of the cross-sectional structure at point AA in Figure 2 of the present invention; Figure 4 is a schematic diagram of the internal structure of the crushing barrel of the present invention; Figure 5 is a schematic diagram of the structure of the granite crushing structure of the present invention; Figure 6 is a schematic diagram of the internal structure of the granite crushing structure of the present invention; Figure 7 is a schematic diagram of the structure of the material separation structure of the present invention; Figure 8 is a schematic diagram of the structure of the central flow guiding structure of the present invention; Figure 9 is a schematic diagram of the structure of the grading and screening structure of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Machine body support frame; 2. Granite crushing structure; 3. Material separation structure; 4. Central guide structure; 5. Grading and screening structure; 6. Crushing barrel; 7. Diversion chamber; 8. Separation chamber; 9. Crushing chamber; 10. Bottom positioning frame; 11. Top positioning frame; 12. Central drive shaft; 13. Conical crushing roller; 14. Driven bevel gear; 15. Motor positioning plate; 16. Gear motor; 17. Drive shaft ; 18. Transmission bevel gear; 19. Shaft protective sleeve; 35. Clearance groove; 20. Top protective cover; 21. Sorting disc; 22. Top guide plate; 23. Central sleeve; 24. Annular rotating sleeve; 25. Central guide plate; 26. Connecting block; 27. Conical screening disc; 28. Conical backflow disc; 29. ​​Conveying barrel; 30. Bottom transmission disc; 31. Positioning shaft; 32. Connecting arm; 33. Striking hammer; 34. Torsion spring. Detailed Implementation

[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Please refer to Figures 1, 2, and 3. A granite aggregate crushing device includes a machine body support frame 1, a granite crushing structure 2 at the upper end of the machine body support frame 1, a material separation structure 3 at the upper end of the granite crushing structure 2, a central guide structure 4 in the middle of the material separation structure 3 and the granite crushing structure 2, and a grading and screening structure 5 at the bottom end of the granite crushing structure 2. The granite crushing structure 2 includes a machine body crushing barrel 6 fixedly installed at the center of the machine body support frame 1. The machine body crushing barrel 6 adopts an integrated design, specifically including a middle diversion chamber 7 fixedly connected to the machine body support frame 1, and a cylindrical sorting chamber 8 and an inverted conical crushing chamber 9 respectively vertically installed at the upper and lower ends of the machine body support frame 1, thereby forming a continuous material processing cavity. The machine body crushing barrel 6 includes a diversion chamber 7 fixedly connected to the machine body support frame 1, and a sorting chamber 8 and a crushing chamber 9 respectively installed at the upper and lower ends of the machine body support frame 1.

[0021] Please refer to Figures 4, 5 and 6. The granite crushing structure 2 includes a bottom positioning frame 10 fixedly installed at the bottom of the crushing chamber 9, and a top positioning frame 11 fixedly connected to the top of the sorting chamber 8. A central drive shaft 12 is rotatably installed at the center of the bottom positioning frame 10 and the top positioning frame 11. The central axes of the bottom positioning frame 10 and the top positioning frame 11 are aligned and jointly support a central drive shaft 12 that vertically penetrates the crushing barrel 6 of the machine body, providing a unified rotational power source for the device.

[0022] Please refer to Figures 5 and 6. A conical crushing roller 13 is fixedly connected to the surface of the central drive shaft 12. A driven bevel gear 14 is fixedly connected to the bottom surface of the conical crushing roller 13. A motor positioning plate 15 is fixedly connected to the side of the crushing chamber 9. A reduction motor 16 is fixedly connected to the surface of the motor positioning plate 15. A drive shaft 17 is rotatably connected to the drive end of the reduction motor 16. A transmission bevel gear 18 is fixedly connected to the end of the drive shaft 17 away from the reduction motor 16. The transmission bevel gear 18 meshes with the driven bevel gear 14. The end of the drive shaft 17 away from the reduction motor 16 extends into the side wall of the crushing chamber 9 and is fixedly connected to a transmission bevel gear 18. The transmission bevel gear 18 and the driven bevel gear 14 mesh with each other, thereby converting the horizontal rotational power of the reduction motor 16 into the vertical rotational power of the conical crushing roller 13.

[0023] Referring to Figure 6, the conical crushing roller 13 is disposed inside the crushing chamber 9. The central drive shaft 12 is eccentrically positioned with respect to the conical crushing roller 13. The rotation axis of the central drive shaft 12 is not coincident with the geometric center axis of the conical crushing roller 13 itself, but is eccentrically positioned. This design causes the gap between the outer surface of the conical crushing roller 13 and the inner wall of the crushing chamber 9 to change periodically when the roller rotates, thereby generating an efficient kneading and crushing effect on the material.

[0024] Please refer to Figures 5 and 6. A shaft protective sleeve 19 is fitted on the surface of the drive shaft 17. The shaft protective sleeve 19 is fixedly connected to the surface of the motor positioning plate 15. One end of the shaft protective sleeve 19 is fixedly connected to the surface of the motor positioning plate 15. Its function is to protect the drive shaft 17 from external dust pollution or accidental impact, and at the same time prevent operators from approaching high-speed rotating parts to ensure operational safety.

[0025] Please refer to Figures 7 and 8. The material separation structure 3 includes a top protective cover 20 fixedly installed on the surface of the top positioning frame 11. The surface of the sorting bin 8 is provided with a clearance groove 35. A top guide plate 22 is fixedly connected inside the clearance groove 35. A sorting disk 21 is fixedly connected to the surface of the central drive shaft 12. The sorting disk 21 is located at the upper end of the top guide plate 22.

[0026] Please refer to Figure 7. The surface of the top protective cover 20 has a feeding opening. The sorting disc 21 is tapered, narrower at the top and wider at the bottom. The sorting disc 21 is located inside the sorting chamber 8. The central drive shaft 12 is located on the surface of the section of the sorting chamber 8 and is fixedly connected to the sorting disc 21. The sorting disc 21 is positioned above the top guide plate 22, allowing the material to be sorted to fall onto the sorting disc 21.

[0027] Please refer to Figures 4 and 8. The central flow guiding structure 4 includes a central sleeve 23 fixedly mounted on the surface of the central drive shaft 12. An annular rotating sleeve 24 is disposed around the outer circumference of the central sleeve 23. Central flow guiding plates 25 are fixedly connected to the surface of the central sleeve 23 in a circular array. The side of the central flow guiding plates 25 furthest from the central sleeve 23 is fixedly connected to the annular rotating sleeve 24. Multiple flow guiding channels are formed between the multiple central flow guiding plates 25. The outer edge of each central flow guiding plate 25 furthest from the central sleeve 23 is fixedly connected to the inner wall of the annular rotating sleeve 24. Thus, the multiple central flow guiding plates 25, the central sleeve 23, and the annular rotating sleeve 24 together constitute a cage-like structure that rotates synchronously with the central drive shaft 12, and multiple downward-sloping flow guiding channels are formed between adjacent central flow guiding plates 25.

[0028] Please refer to Figures 4 and 9. The bottom surface of the bottom positioning frame 10 is fixedly connected with connecting blocks 26 in a circular array. The bottom end of the connecting blocks 26 is fixedly connected with a conical screening disc 27. The bottom end of the conical screening disc 27 is fixedly connected with a conical backflow disc 28. The center of the conical screening disc 27 and the conical backflow disc 28 is fixedly connected with a conveying bucket 29. The bottom end of the central drive shaft 12 is fixedly connected with a bottom drive disc 30. The surface of the bottom drive disc 30 is symmetrically fixedly connected with a positioning shaft 31. The surface of the positioning shaft 31 is rotatably connected with a connecting arm 32. The end of the connecting arm 32 away from the positioning shaft 31 is fixedly connected with a striking hammer 33. The striking hammer 33 is in close contact with the surface of the conical screening disc 27. The surface of the positioning shaft 31 is fitted with a torsion spring 34. The two ends of the torsion spring 34 are fixedly connected to the bottom drive disc 30 and the connecting arm 32, respectively. In the natural state, the striking hammer 33 remains in close contact with the upper surface of the conical screening disc 27 under the action of gravity or pre-tightening force. A torsion spring 34 is also fitted on the surface of each positioning shaft 31. The two ends of the torsion spring 34 are fixedly connected to the bottom transmission plate 30 and the connecting arm 32, respectively, to provide the reset torque and enhance the striking force of the hammer 33.

[0029] In operation, the device is activated by turning on the reduction motor 16. The reduction motor 16 drives the drive shaft 17, which in turn drives the transmission bevel gear 18 to rotate. Simultaneously, the rotation of the transmission bevel gear 18 drives the driven bevel gear 14 to rotate. The rotation of the driven bevel gear 14, in turn, drives the conical crushing roller 13, the central sleeve 23, and the sorting disc 21 to rotate. After completion, the granite crushed stone is placed inside the sorting chamber 8 through the notch in the top protective cover 20. The granite rolls through the sorting disc 21 into the diversion chamber 7. As the sorting disc 21 rotates, larger stones roll to the edge of the sorting disc 21 and are conveyed through its rotation, exiting from inside the clearance trough 35 and being guided by the top guide plate 22. After the composite crushed stone enters the diversion chamber 7, the central sleeve 23 drives the central guide plate 25 and the annular rotating sleeve 24 to rotate, allowing the stone to enter the central guide plate 25. Entering the central guide plate 25 effectively prevents stone accumulation and blockage. The stone then flows through the central guide plate 25 into the crushing chamber 9. In the crushing chamber 9, the central drive shaft 12 drives the conical crushing roller 13 to rotate. Due to the eccentric arrangement of the conical crushing roller 13, it crushes the stone material against the inner wall of the crushing chamber 9. The crushed stone material falls into the conical screening disc 27. Simultaneously, the rotation of the central drive shaft 12 drives the bottom drive disc 30 to rotate synchronously. The rotation of the bottom drive disc 30 drives the positioning shaft 31 on the surface to rotate. Simultaneously, the rotation of the positioning shaft 31 drives the striking hammer 33 via the connecting arm 32 to rotate on the conical screen. The internal friction of the disc 27 is caused by the mesh surface inside the conical screening disc 27. When the hammer 33 rotates, it works in conjunction with the torsion spring 34 on the surface of the positioning shaft 31 to strike the conical screening disc 27, thereby causing the surface of the conical screening disc 27 to vibrate. Some of the smaller stones are discharged from the holes on the surface of the conical screening disc 27, while the larger stones gather towards the center and are discharged from the inside of the conveying barrel 29. The smaller stones are discharged from the outer ring of the 28, while the larger stones are discharged downward from the inside of the conveying barrel 29 to the bottom surface of the conical backflow disc 28.

[0030] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crushing device based on granite aggregate, characterized in that: The machine includes a body support frame (1), a granite crushing structure (2) is provided at the upper end of the body support frame (1), a material separation structure (3) is provided at the upper end of the granite crushing structure (2), a central flow guide structure (4) is provided in the middle of the material separation structure (3) and the granite crushing structure (2), and a grading screening structure (5) is provided at the bottom end of the granite crushing structure (2); the granite crushing structure (2) includes a body crushing barrel (6) fixedly set at the center of the body support frame (1); the body crushing barrel (6) includes a diversion chamber (7) fixedly connected to the body support frame (1), and a sorting chamber (8) and a crushing chamber (9) respectively set at the upper and lower ends of the body support frame (1).

2. The granite aggregate crushing device according to claim 1, characterized in that: The granite crushing structure (2) includes a bottom positioning frame (10) fixedly installed at the bottom of the crushing chamber (9), and a top positioning frame (11) fixedly connected to the top of the sorting chamber (8). A central drive shaft (12) is rotatably installed at the center of the bottom positioning frame (10) and the top positioning frame (11).

3. The granite aggregate crushing device according to claim 2, characterized in that: A conical crushing roller (13) is fixedly connected to the surface of the central drive shaft (12). A driven bevel gear (14) is fixedly connected to the bottom surface of the conical crushing roller (13). A motor positioning plate (15) is fixedly connected to the side of the crushing chamber (9). A reduction motor (16) is fixedly connected to the surface of the motor positioning plate (15). A drive shaft (17) is rotatably connected to the drive end of the reduction motor (16). A transmission bevel gear (18) is fixedly connected to the end of the drive shaft (17) away from the reduction motor (16). The transmission bevel gear (18) meshes with the driven bevel gear (14).

4. The granite aggregate crushing device according to claim 3, characterized in that: The conical crushing roller (13) is located inside the crushing chamber (9), and the central drive shaft (12) is eccentrically positioned with respect to the conical crushing roller (13).

5. A granite aggregate crushing device according to claim 4, characterized in that: The surface of the drive shaft (17) is fitted with a shaft protective sleeve (19), which is fixedly connected to the surface of the motor positioning plate (15).

6. The granite aggregate crushing device according to claim 5, characterized in that: The material separation structure (3) includes a top protective cover (20) fixedly installed on the surface of the top positioning frame (11), a clearance groove (35) is provided on the surface of the sorting bin (8), a top guide plate (22) is fixedly connected inside the clearance groove (35), and a sorting disk (21) is fixedly connected to the surface of the central drive shaft (12), and the sorting disk (21) is located at the upper end of the top guide plate (22).

7. A granite aggregate crushing device according to claim 6, characterized in that: The surface of the top protective cover (20) is provided with a feeding opening. The sorting disc (21) is a cone shape that is narrow at the top and wide at the bottom. The sorting disc (21) is located inside the sorting bin (8).

8. A granite aggregate crushing device according to claim 7, characterized in that: The central flow guiding structure (4) includes a central sleeve (23) fixedly set on the surface of the central drive shaft (12). The outer ring of the central sleeve (23) is provided with an annular rotating sleeve (24). The surface of the central sleeve (23) is fixedly connected with central flow guiding plates (25) in an annular array. The side of the central flow guiding plate (25) far away from the central sleeve (23) is fixedly connected to the annular rotating sleeve (24). Multiple flow guiding channels are formed between the multiple central flow guiding plates (25).

9. A granite aggregate crushing device according to claim 8, characterized in that: The bottom of the bottom positioning frame (10) is fixedly connected to connecting blocks (26) in a circular array on its bottom surface. A conical screening disc (27) is fixedly connected to the bottom end of the connecting blocks (26). A conical backflow disc (28) is fixedly connected to the bottom end of the conical screening disc (27). A conveying bucket (29) is fixedly connected to the center of the conical screening disc (27) and the conical backflow disc (28). A bottom transmission disc (30) is fixedly connected to the bottom end of the central drive shaft (12). A positioning shaft (31) is symmetrically fixedly connected to the surface of the cone-shaped screening disc (27). A connecting arm (32) is rotatably connected to the surface of the positioning shaft (31). A hammer (33) is fixedly connected to one end of the connecting arm (32) away from the positioning shaft (31). The hammer (33) is in close contact with the surface of the cone-shaped screening disc (27). A torsion spring (34) is sleeved on the surface of the positioning shaft (31). The two ends of the torsion spring (34) are fixedly connected to the bottom transmission disc (30) and the connecting arm (32) respectively.

10. A construction method based on granite aggregate crushing, comprising any one of the above-mentioned granite aggregate crushing devices according to any one of claims 1-9, characterized in that: S1. Start the device and turn on the geared motor (16). Drive the central drive shaft (12) to rotate through the transmission system, thereby driving the sorting disc (21), the central guide plate (25), the conical crushing roller (13) and the bottom drive disc (30) to operate synchronously, providing power for the entire crushing and screening process; S2. Feed the material and feed the granite crushed stone to be processed into the sorting bin (8) through the feed inlet of the top protective cover (20); S3. Pre-separate the material. The rotating conical sorting disc (21) uses centrifugal force to make the crushed material that meets the particle size requirements gather towards the center and fall, while larger pieces of material are thrown to the edge and pass through the clearance groove (35) on the side wall of the sorting bin (8) and the fixed top guide plate. S4. Central guide flow to prevent blockage. The falling material enters the diversion chamber (7). The dynamic guide channel formed by the rotating central guide plate (25) forcibly disperses the material to prevent it from accumulating or bridging in the chamber, ensuring that the material enters the crushing chamber (9) below evenly and smoothly. S5. Extrusion crushing and screening. The material is crushed by the eccentrically set conical crushing roller (13) in the crushing chamber (9). The crushed material falls onto the conical screening plate (27). The bottom transmission plate (30) rotates and drives the hammer (33) to periodically strike the screen plate, generating vibration for efficient screening. Fine material passes through the screen and is discharged. Larger particles gather towards the center and are discharged through the conveying bucket (29).

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