A combined crushing plant for producing sand

Abstract

The utility model discloses a kind of combined crushing equipment for sand making belongs to sandstone production technical field, including crushing assembly, the crushing assembly includes support, the support is symmetrically equipped with driving crushing roller and driven crushing roller, driving motor is installed on the support, and driving crushing roller rotates, the driving crushing roller is driven crushing roller through chain transmission;Screening assembly, the screening assembly includes screening bin installed on support, sandstone after crushing falls into the inside of screening bin under the action of gravity, the inside of screening bin is also equipped with screening board, movable groove is opened in the inside of screening board, slidingly installed movable plate is in the inside of movable groove, screen hole is opened in the screening board, through hole corresponding with screen hole is opened in the movable plate;Without disassembly, it can adjust screening aperture, both reduce manpower time cost, and can satisfy diversified sand making demand.

Description

Technical Field

[0001] This utility model specifically relates to a combined crushing equipment for sand making, belonging to the field of sand and gravel production technology. Background Technology

[0002] The demand for sand and gravel continues to rise in infrastructure construction such as buildings and highways. Crushing and screening are the core processes in sand making, and their synergy directly determines the efficiency of the production line and the quality of the finished product. Currently, traditional sand making production lines mostly adopt decentralized equipment configurations, with crushing and screening equipment operating independently. Materials need to be transferred via conveyor belts, which can easily lead to accumulation and blockage, causing interruptions in process connections. Furthermore, multiple transfers extend the production cycle, increase costs, and make it difficult to control in real time to ensure the stability of the finished product gradation.

[0003] Existing technologies include combined crushers that integrate crushing and screening. While these simplify equipment layout and reduce material handling steps, they still have a key drawback: the screen aperture cannot be easily adjusted according to the required particle size. In actual sand production, different projects have different requirements for sand and gravel particle size, necessitating frequent adjustments to the screen aperture to match the desired finished particle size. However, the screens in existing combined crushers are mostly fixed installations. Adjusting the aperture requires stopping the machine, disassembling the original screen, and replacing it with a new screen of the corresponding aperture. This cumbersome process not only consumes a lot of manpower and time but also causes prolonged production line downtime, severely impacting continuous production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a combined crushing equipment for sand making.

[0005] A combined crushing equipment for sand making, comprising

[0006] A crushing assembly, comprising a support frame on which an active crushing roller and a driven crushing roller are symmetrically mounted, and a drive motor for driving the active crushing roller to rotate is mounted on the support frame, wherein the active crushing roller and the driven crushing roller are connected by a chain drive.

[0007] A screening assembly includes a screening chamber mounted on a support. Crushed sand and gravel fall into the screening chamber under gravity. A screening plate is installed inside the screening chamber. The screening plate has a movable groove inside. A movable plate is slidably installed inside the movable groove. The screening plate has screen holes. The movable plate has through holes corresponding to the screen holes. A second adjusting screw is threaded to the side wall of the screening chamber. One end of the second adjusting screw extends into the movable groove and is rotatably connected to the movable plate. The movable plate slides along the movable groove to adjust the size of the connection between the through holes and the screen holes.

[0008] Furthermore, a mounting bracket is slidably mounted on the bracket, and the driven crushing roller is rotatably connected to the mounting bracket. The mounting bracket drives the driven crushing roller to synchronously adjust the distance between the driving crushing roller and the driven crushing roller. A first adjusting screw is also threadedly connected to the bracket, and one end of the first adjusting screw is rotatably connected to the mounting bracket.

[0009] Furthermore, the drive end of the drive motor is equipped with a drive pulley, the drive crushing roller is equipped with a driven pulley, and a synchronous belt is connected between the drive pulley and the driven pulley.

[0010] Furthermore, an active sprocket is installed at the end of the active crushing roller, a driven sprocket is installed at the end of the driven crushing roller, a first tensioning sprocket and a second tensioning sprocket are installed on the bracket, and a transmission chain is connected between the active sprocket, the driven sprocket, the first tensioning sprocket and the second tensioning sprocket.

[0011] Furthermore, the screening chamber has a discharge channel located below the screening plate. The side wall of the screening chamber has a coarse material outlet and a fine material outlet, with the fine material outlet corresponding to the discharge channel and the bottom of the coarse material outlet flush with the top surface of the screening plate.

[0012] Furthermore, a feed hopper is installed on the support, and both the active crushing roller and the driven crushing roller are rotatably installed inside the feed hopper.

[0013] Furthermore, the bracket is provided with a slide rail, and the mounting bracket is slidably connected to the slide rail.

[0014] Furthermore, a threaded through hole is provided on the side wall of the screening chamber, and the second adjusting screw is threadedly connected inside the threaded through hole.

[0015] Beneficial effects:

[0016] 1. This utility model allows for flexible adjustment of the distance between the active and driven crushing rollers by pushing the mounting frame along the slide rail via the first adjusting screw, adapting to different raw material hardness and crushing particle size requirements; rotating the second adjusting screw can drive the movable plate to slide along the movable groove, changing the size of the connecting part between the through hole and the screen hole, allowing adjustment of the screening hole diameter without disassembly, and the self-locking and precision of the threaded connection ensures structural stability and high accuracy after adjustment, reducing labor and time costs while meeting diversified sand making needs.

[0017] 2. In this utility model, the crushing and screening components are integrated into the support frame. The raw material enters the double roller crusher directly through the feed hopper. After crushing, the sand and gravel fall into the screening bin by gravity, eliminating the transfer link and avoiding accumulation and blockage. The synchronous belt and sprocket chain work together to tension the sprocket to ensure stable transmission of the double rollers. Coarse and fine materials are discharged separately from the fine material outlet and coarse material outlet, which improves the continuous production efficiency and the finished product grading effect, while reducing the equipment footprint, energy consumption and maintenance costs, and extending the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0020] Figure 3 This is a side view of the structure of this utility model;

[0021] Figure 4 This is a side sectional view of the present invention.

[0022] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of the screening plate in this utility model.

[0023] In the diagram: 1. Support frame; 2. Feed hopper; 3. Screening bin; 4. Coarse material outlet; 5. Fine material outlet; 6. Screening plate; 7. Active crushing roller; 8. Drive motor; 9. Active pulley; 10. Driven pulley; 11. Synchronous belt; 12. Mounting frame; 13. Driven crushing roller; 14. First adjusting screw; 15. Active sprocket; 16. Driven sprocket; 17. First tension sprocket; 18. Second tension sprocket; 19. Transmission chain; 20. Second adjusting screw; 21. Screen hole; 22. Movable groove; 23. Movable plate; 24. Through hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 As shown, a combined crushing device for sand making includes...

[0026] The crushing assembly includes a support 1, on which an active crushing roller 7 and a driven crushing roller 13 are symmetrically mounted. A drive motor 8 that drives the active crushing roller 7 to rotate is mounted on the support 1. The active crushing roller 7 and the driven crushing roller 13 are connected by a chain drive.

[0027] The screening assembly includes a screening chamber 3 mounted on a support 1. Crushed sand and gravel fall into the screening chamber 3 under gravity. A screening plate 6 is also installed inside the screening chamber 3. A movable groove 22 is opened inside the screening plate 6. A movable plate 23 is slidably installed inside the movable groove 22. Screen holes 21 are opened on the screening plate 6. Through holes 24 corresponding to the screen holes 21 are opened on the movable plate 23. A second adjusting screw 20 is threadedly connected to the side wall of the screening chamber 3. One end of the second adjusting screw 20 extends into the movable groove 22 and is rotatably connected to the movable plate 23. The movable plate 23 slides along the movable groove 22 to adjust the size of the connection between the through hole 24 and the screen hole 21.

[0028] Specifically, the bracket 1 provides support for the overall structure, and the drive motor 8 outputs power after starting, driving the active crushing roller 7 to rotate. The active crushing roller 7, in conjunction with the chain drive structure, synchronously drives the driven crushing roller 13 to rotate, and the two rollers work together to squeeze, shear and crush the incoming raw materials.

[0029] The crushed sand and gravel fall directly into the screening chamber 3 installed on the support 1 under the action of gravity. The screening plate 6 in the screening chamber 3 receives the sand and gravel. When it is necessary to adjust the screening particle size, the second adjusting screw 20 connected to the side wall of the screening chamber 3 is rotated. One end of the screw extends into the movable groove 22 of the screening plate 6 and pushes the movable plate 23 to slide along the movable groove 22. By changing the size of the connecting part between the through hole 24 on the movable plate 23 and the screen hole 21 on the screening plate 6, the actual screening hole diameter can be adjusted.

[0030] No need to stop the machine to disassemble and replace the screen plate; the aperture can be adjusted simply by turning the second adjusting screw 20, saving labor and time costs, avoiding production line downtime, and ensuring continuous production efficiency.

[0031] The movable plate 23 slides smoothly in the movable groove 22, and the through hole 24 and the sieve hole 21 have high matching precision, which can accurately control the sieve hole diameter and avoid the problem of unqualified finished particle size caused by improper installation.

[0032] The crushing and screening components are integrated into the support frame 1, eliminating the material transfer process, reducing the risk of accumulation and blockage, shortening the production cycle, and reducing equipment footprint and transfer costs.

[0033] As a technical optimization of this utility model, a mounting frame 12 is slidably installed on the bracket 1, and the driven crushing roller 13 is rotatably connected to the mounting frame 12. The mounting frame 12 drives the driven crushing roller 13 to synchronously adjust the distance between the active crushing roller 7 and the driven crushing roller 13. A first adjusting screw 14 is also threadedly connected to the bracket 1, and one end of the first adjusting screw 14 is rotatably connected to the mounting frame 12.

[0034] Specifically, the slide rail on the bracket 1 provides a sliding guide for the mounting frame 12, and the driven crushing roller 13 is rotatably connected to the mounting frame 12. When it is necessary to adjust the spacing according to the hardness of the raw material, the initial particle size, or the required crushing particle size, the first adjusting screw 14 threaded on the bracket 1 is rotated, and one end of it pushes the mounting frame 12 to slide along the slide rail. The mounting frame 12 synchronously drives the driven crushing roller 13 to move, thereby changing the spacing between the active crushing roller 7 and the driven crushing roller 13.

[0035] As a technical optimization of this utility model, the drive end of the drive motor 8 is equipped with a drive pulley 9, the drive roller 7 is equipped with a driven pulley 10, and a synchronous belt 11 is connected between the drive pulley 9 and the driven pulley 10.

[0036] Specifically, the drive end of the drive motor 8 is equipped with a drive pulley 9, and the driven pulley 10 is installed on the active crushing roller 7. The drive pulley 9 and the driven pulley 10 are connected by a synchronous belt 11. After the drive motor 8 starts, the drive pulley 9 transmits power synchronously to the driven pulley 10 through the synchronous belt 11, thereby driving the active crushing roller 7 to rotate stably.

[0037] As a technical optimization of this utility model, an active sprocket 15 is installed at the end of the active crushing roller 7, a driven sprocket 16 is installed at the end of the driven crushing roller 13, a first tensioning sprocket 17 and a second tensioning sprocket 18 are installed on the bracket 1, and a transmission chain 19 is connected between the active sprocket 15, the driven sprocket 16, the first tensioning sprocket 17 and the second tensioning sprocket 18.

[0038] Specifically, an active sprocket 15 is installed at the end of the active crushing roller 7, and a driven sprocket 16 is installed at the end of the driven crushing roller 13. The first tension sprocket 17 and the second tension sprocket 18 installed on the bracket 1 tension and guide the transmission chain 19. When the active crushing roller 7 rotates, the active sprocket 15 drives the first tension sprocket 17, the second tension sprocket 18 and the driven sprocket 16 to rotate in sequence through the transmission chain 19, so as to achieve synchronous rotation of the driven crushing roller 13 and the active crushing roller 7.

[0039] As a technical optimization of this utility model, the screening chamber 3 has a discharge channel inside, which is located below the screening plate 6. The side wall of the screening chamber 3 is provided with a coarse material outlet 4 and a fine material outlet 5. The fine material outlet 5 corresponds to the discharge channel, and the bottom end of the coarse material outlet 4 is flush with the top surface of the screening plate 6.

[0040] Specifically, the discharge channel inside the screening chamber 3 is located below the screening plate 6. Fine materials that meet the aperture requirements after screening fall into the discharge channel through the connection between the screen hole 21 and the through hole 24 and are discharged from the fine material outlet 5 on the side wall of the screening chamber 3. Coarse materials that do not meet the aperture requirements accumulate on the screening plate 6. Since the bottom of the coarse material outlet 4 is flush with the top surface of the screening plate 6, the coarse materials can slide out of the coarse material outlet 4 along the top surface of the screening plate 6.

[0041] As a technical optimization of this utility model, a feed hopper 2 is installed on the support 1, and both the active crushing roller 7 and the driven crushing roller 13 are rotatably installed inside the feed hopper 2.

[0042] Specifically, the feed hopper 2 installed on the support 1 provides guidance for the raw materials. The active crushing roller 7 and the driven crushing roller 13 are both rotatably installed inside the feed hopper 2. After the raw materials enter from the top of the feed hopper 2, they can fall directly between the two rollers for crushing without the need for an additional transfer structure.

[0043] As a technical optimization of this utility model, the bracket 1 is provided with a slide rail, and the mounting bracket 12 is slidably connected to the slide rail.

[0044] Specifically, the slide rail on the bracket 1 provides sliding constraint for the mounting frame 12. When the first adjusting screw 14 is rotated to push the mounting frame 12, the mounting frame 12 slides linearly along the slide rail, causing the driven crushing roller 13 to move in a fixed direction, ensuring the parallelism between the driven crushing roller 13 and the active crushing roller 7.

[0045] As a technical optimization of this utility model, a threaded through hole is provided on the side wall of the screening chamber 3, and the second adjusting screw 20 is threadedly connected inside the threaded through hole.

[0046] Specifically, the threaded through hole on the side wall of the screening chamber 3 provides installation and positioning for the second adjusting screw 20. The second adjusting screw 20 is threadedly connected in the threaded through hole and can move axially along the thread direction when rotated. One end of it extends into the movable groove 22 and is rotatably connected to the movable plate 23, thereby pushing the movable plate 23 to slide.

[0047] Working principle: Raw materials enter the equipment through the feed hopper 2 on the support 1. After the drive motor 8 is started, the drive end of the drive motor 8 drives the active pulley 9 to rotate, which drives the driven pulley 10 and the active crushing roller 7 to rotate through the synchronous belt 11. The synchronous belt 11 transmission has the characteristics of stable transmission ratio and efficient power transmission, which can ensure that the speed of the active crushing roller 7 is consistent with the output speed of the drive motor 8, avoid speed fluctuations affecting the uniformity of crushed particle size, and has low operating noise, low wear, and is easier to maintain, reducing the probability of equipment failure.

[0048] When the active crushing roller 7 rotates, its active sprocket 15 at its end, through the transmission chain 19, cooperates with the driven sprocket 16 at the end of the driven crushing roller 13, as well as the first tension sprocket 17 and the second tension sprocket 18 mounted on the bracket 1, to drive the driven crushing roller 13 to rotate synchronously. The first tension sprocket 17 and the second tension sprocket 18 can adjust the tension of the transmission chain 19 in real time to prevent the chain from becoming loose and slipping, ensure synchronous rotation of the two rollers, ensure uniform force on the raw material during the crushing process, and improve the consistency of the crushed particle size.

[0049] If adjustments are needed based on raw material characteristics such as hardness, initial particle size, or required crushing particle size, the first adjusting screw 14 threaded on the rotating bracket 1 is rotated. One end of the screw pushes the mounting frame 12 to slide along the slide rail on the bracket 1. The mounting frame 12 simultaneously drives the driven crushing roller 13 to move, flexibly changing the distance between the active crushing roller 7 and the driven crushing roller 13. The raw material is finally crushed under the squeezing and shearing action of the double rollers. The entire crushing process is stable and flexible in adjustment, laying a good foundation for the subsequent screening process.

[0050] The crushed sand and gravel fall from the feed hopper 2 into the screening chamber 3 installed on the support 1 below under the influence of gravity, and directly onto the screening plate 6 inside the screening chamber 3. Because the crushing and screening components are integrated into the same support 1, this process eliminates the need for conveyor belts and other transfer links, avoids material accumulation and blockage, shortens the production cycle, reduces transfer costs, and at the same time reduces material contamination during transfer, improving the cleanliness of the finished product.

[0051] When adjusting the sieving according to the required finished particle size, rotate the second adjusting screw 20 inside the threaded through hole on the side wall of the sieving chamber 3. One end of the second adjusting screw 20 extends into the movable groove 22 of the sieving plate 6, pushing the movable plate 23 to slide along the movable groove 22. This changes the size of the connecting part between the through hole 24 on the movable plate 23 and the sieve hole 21 on the sieving plate 6, thereby adjusting the actual sieving aperture. This adjustment method eliminates the need to stop the machine to disassemble and replace the sieve plate, saving manpower and time costs, avoiding long-term production line shutdowns, ensuring continuous production efficiency, reducing wear and tear on equipment parts caused by frequent disassembly, extending equipment lifespan, and ensuring smooth sliding of the movable plate 23 and high precision in the fit between the through hole 24 and the sieve hole 21. This allows for precise control of sieving accuracy and avoids finished particle size defects caused by improper installation.

[0052] During the screening process, fine materials that meet the aperture requirements enter the discharge channel below the screening plate 6 through the connection between the through hole 24 and the screen hole 21, and are finally discharged from the fine material outlet 5 on the side wall of the screening chamber 3. Coarse materials that do not meet the aperture requirements accumulate on the screening plate 6. Since the bottom of the coarse material outlet 4 is flush with the top surface of the screening plate 6, the coarse materials slide out of the coarse material outlet 4 along the top surface of the screening plate 6. The design of the coarse material outlet 4 and the fine material outlet 5 enables rapid separation and classification of coarse and fine materials, improves the efficiency of finished product grading, ensures stable finished product gradation, solves the problem of poor coordination in traditional decentralized equipment, and ultimately achieves integrated and efficient operation of crushing and screening.

[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combined crushing device for sand making, characterized in that: include The crushing assembly includes a support (1), on which an active crushing roller (7) and a driven crushing roller (13) are symmetrically mounted. A drive motor (8) for driving the active crushing roller (7) to rotate is mounted on the support (1). The active crushing roller (7) and the driven crushing roller (13) are driven by a chain. The screening assembly includes a screening chamber (3) mounted on a support (1). The crushed sand and gravel fall into the screening chamber (3) under gravity. A screening plate (6) is also installed inside the screening chamber (3). A movable groove (22) is opened inside the screening plate (6). A movable plate (23) is slidably installed inside the movable groove (22). A screen hole (21) is opened on the screening plate (6). A through hole (24) corresponding to the screen hole (21) is opened on the movable plate (23). A second adjusting screw (20) is threadedly connected to the side wall of the screening chamber (3). One end of the second adjusting screw (20) extends into the movable groove (22) and is rotatably connected to the movable plate (23). The movable plate (23) slides along the movable groove (22) to adjust the size of the connecting part between the through hole (24) and the screen hole (21).

2. The combined crushing equipment for sand making as described in claim 1, characterized in that: A mounting frame (12) is slidably mounted on the bracket (1). The driven crushing roller (13) is rotatably connected to the mounting frame (12). The mounting frame (12) drives the driven crushing roller (13) to synchronously adjust the distance between the active crushing roller (7) and the driven crushing roller (13). A first adjusting screw (14) is also threadedly connected to the bracket (1). One end of the first adjusting screw (14) is rotatably connected to the mounting frame (12).

3. The combined crushing equipment for sand making as described in claim 1, characterized in that: The drive end of the drive motor (8) is equipped with a drive pulley (9), the drive roller (7) is equipped with a driven pulley (10), and a synchronous belt (11) is connected between the drive pulley (9) and the driven pulley (10).

4. The combined crushing equipment for sand making as described in claim 1, characterized in that: The active crushing roller (7) is equipped with an active sprocket (15) at its end, and the driven crushing roller (13) is equipped with a driven sprocket (16) at its end. The support (1) is equipped with a first tension sprocket (17) and a second tension sprocket (18). A transmission chain (19) is connected between the active sprocket (15), the driven sprocket (16), the first tension sprocket (17), and the second tension sprocket (18).

5. The combined crushing equipment for sand making as described in claim 1, characterized in that: The screening chamber (3) has a discharge channel inside, which is located below the screening plate (6). The screening chamber (3) has a coarse material outlet (4) and a fine material outlet (5) on its side wall. The fine material outlet (5) corresponds to the discharge channel, and the bottom of the coarse material outlet (4) is flush with the top surface of the screening plate (6).

6. The combined crushing equipment for sand making as described in claim 1, characterized in that: The support (1) is equipped with a feed hopper (2), and the active crushing roller (7) and the driven crushing roller (13) are both rotatably installed inside the feed hopper (2).

7. The combined crushing equipment for sand making as described in claim 2, characterized in that: The bracket (1) is provided with a slide rail, and the mounting bracket (12) is slidably connected to the slide rail.

8. The combined crushing equipment for sand making as described in claim 1, characterized in that: The screening chamber (3) has a threaded through hole on its side wall, and the second adjusting screw (20) is threadedly connected inside the threaded through hole.

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