A multi-stage screening grit device

Abstract

The utility model discloses a kind of multi-stage screening gravel devices, which aims to solve the technical problem that the surface of large particle size gravel particles is easily adhered to small particles under prior art, which is difficult to fall off, and further cannot realize the repeated accurate screening of gravel. The screening device comprises a screening base, a screening box and a screen assembly. The inner wall of the screening box at the top of the screening base is installed with the screen assembly. The surface of the screening box is installed with a vibration motor. The inner wall of the screening box is respectively provided with a driving brush roller and a driven brush roller. The driving brush roller and the driven brush roller are respectively connected with the screening box through a first bearing. When the driving motor operates, it drives the driving brush roller to rotate and drives the driven brush roller to rotate through the driving pulley, belt loop and driven pulley. When the driving brush roller and the driven brush roller rotate, small gravel attached to the surface of large particle gravel is separated by the bristles. The small gravel is screened through the screen assembly. In this way, the gravel particles of different sizes can be fully screened.

Description

Technical Field

[0001] This utility model belongs to the field of sand and gravel screening technology, specifically relating to a multi-stage sand and gravel screening device. Background Technology

[0002] A multi-stage screening device is a piece of equipment used for multi-stage screening of sand and gravel. Its structure and working principle are carefully designed to achieve efficient and precise screening results. Multi-stage screening devices typically contain multiple layers of screens, with the mesh size decreasing from top to bottom to achieve screening of sand and gravel of different particle sizes. The screens are mostly made of stainless steel, which is acid and corrosion resistant, and does not easily rust, ensuring the durability of the device.

[0003] In operation, the multi-stage screening sand and gravel device allows sand and gravel materials to enter the screening box through the feed pipe. Inside the screening box, the materials are sequentially screened through multiple layers of screens. Larger particles are blocked by the upper screen and move forward, while smaller particles fall through the screens into the next layer or the bottom collection area. During the screening process, auxiliary devices such as water tanks and drip heads can prevent dust and clean the screens, while buffer units can reduce the impact of the materials and protect the screens and equipment from damage. After screening, sand and gravel materials of different sizes are discharged from the device through different outlets.

[0004] The existing screening devices have the following problems during use:

[0005] Multi-stage screening equipment for sand and gravel often encounters a challenging problem in practical use: large sand and gravel particles easily attract and adhere to the surface of numerous tiny particles. These tiny particles are tightly attached to the surface of the large particles and are difficult to detach on their own. As a result, during subsequent screening operations, these large sand and gravel particles with adhered tiny particles cannot pass through the screens of the appropriate aperture size due to the "artificially increased" overall particle size, thus hindering the repeated and accurate screening of the sand and gravel. This not only severely affects the efficiency and quality of sand and gravel screening, resulting in uneven particle size of the screened sand and gravel products, but may also increase the difficulty and cost of subsequent processing, reducing the overall efficiency of the sand and gravel production process. Utility Model Content

[0006] (1) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a multi-stage sand and gravel screening device. This device aims to solve the problem that, in existing technologies, large-diameter sand and gravel particles easily adhere to the surface of many fine particles. These fine particles are tightly attached to the surface of the large particles and are difficult to detach on their own. As a result, during subsequent screening operations, these large sand and gravel particles with adhered fine particles will be unable to pass through the screen of the corresponding aperture due to the "artificial increase" in their overall particle size, thus preventing the achievement of repeated and accurate screening of sand and gravel.

[0008] (2) Technical solution

[0009] To solve the above-mentioned technical problems, this utility model provides a multi-stage sand and gravel screening device. The screening device includes a screening base, a screening box, and a screen assembly. The screen assembly is installed on the inner wall of the screening box at the top of the screening base. A vibration motor is installed on the surface of the screening box. An active brush roller and a driven brush roller are respectively arranged on the inner wall of the screening box. The active brush roller and the driven brush roller are respectively connected to the screening box through a first bearing so that the active brush roller and the driven brush roller can rotate inside the screening box. The lowest point of the active brush roller and the driven brush roller is in contact with the top screen surface of the screen assembly.

[0010] When using the screening device of this technical solution, the drive motor drives the active brush roller to rotate during operation. When the active brush roller rotates, it drives the driven brush roller to rotate through the active pulley, belt ring and driven pulley. When large particles of sand and gravel run to the bottom side of the active brush roller and the driven brush roller, the rotation of the active brush roller and the driven brush roller separates the small sand and gravel attached to the surface of the large particles of sand and gravel through the friction of the bristles.

[0011] Preferably, the end of the active brush roller is connected to an active pulley, the end of the driven brush roller is connected to a driven pulley, belt rings are fitted onto the surfaces of the active pulley and the driven pulley, and a drive motor connected to the screening base is installed at the other end of the active brush roller. When the drive motor runs, it can drive the active brush roller to rotate, thereby providing driving force for the rotation of the active brush roller.

[0012] Furthermore, the driving pulley and the driven pulley form a linkage structure through the belt ring. When the driving brush roller rotates, it can drive the driving pulley to rotate. When the driving pulley rotates, it can drive the driven pulley to rotate through the belt ring. When the driven pulley rotates, it can drive the driven brush roller to rotate, thereby realizing the transmission between the driving brush roller and the driven brush roller.

[0013] Furthermore, a power motor is installed at the bottom of the screen assembly, and a threaded rod is connected to the output end of the power motor. A second bearing that fits into the inner wall of the screening box is sleeved at the end of the threaded rod.

[0014] Furthermore, a threaded sleeve is fitted onto the surface of the threaded rod, and an adjusting plate is connected to the bottom surface of the threaded sleeve. A guide rod connected to the inner wall of the screening box passes through the interior of the adjusting plate. When the adjusting plate is subjected to force, it can slide on the surface of the guide rod, which can limit the movement direction of the adjusting plate.

[0015] Furthermore, a telescopic rod is installed on the side surface of the adjusting plate, and a scraper is connected to the output end of the telescopic rod so that the telescopic rod drives the scraper to move axially.

[0016] Furthermore, when the scraper moves to the bottom of its stroke, the bottom side of the scraper moves to the bottom side of the inner wall of the screening box. When the telescopic rod drives the scraper to move to the bottom side of the inner wall of the screening box, the scraper can push the small gravel to slide.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In this invention, the drive motor drives the active brush roller to rotate during operation. When the active brush roller rotates, it drives the driven brush roller to rotate through the active pulley, belt ring and driven pulley. When large sand and gravel particles run to the bottom side of the active and driven brush rollers, the rotation of the active and driven brush rollers separates the small sand and gravel particles attached to the surface of the large sand and gravel particles through the friction of the bristles. The small sand and gravel particles can be screened through the screen assembly, so that sand and gravel particles of different sizes can be fully screened.

[0020] In this invention, when the telescopic rod drives the scraper to move downward to the bottom surface of the box, the power motor is activated. When the power motor is running, it can drive the threaded rod to rotate. When the threaded rod rotates, it drives the adjusting plate to move through the threaded sleeve. The lateral movement of the adjusting plate can drive the scraper to move to the other end of the screening box through the telescopic rod. Thus, the scraper can push the accumulated small sand and gravel to the discharge port for easy discharge. This can prevent the damp small sand and gravel from adhering to the bottom side of the inner wall of the screening box and making it impossible to discharge. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the device of this utility model;

[0022] Figure 2 This is a side view of the device of this utility model.

[0023] Figure 3 This is a schematic diagram of the brush roller linkage structure of the device of this utility model;

[0024] Figure 4 This is a bottom view and a partial enlarged view of the scraper drive structure of the present invention;

[0025] Figure 5This is a top view and a partial enlarged view of the scraper drive structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the scraper adjustment structure of the device of this utility model.

[0027] The labels in the attached diagram are as follows: 1. Screening base; 2. Screening box; 3. Screen assembly; 4. Vibrating motor; 5. Active brush roller; 6. Driven brush roller; 7. First bearing; 8. Active pulley; 9. Driven pulley; 10. Belt ring; 11. Drive motor; 12. Power motor; 13. Threaded rod; 14. Second bearing; 15. Threaded sleeve; 16. Adjusting plate; 17. Guide rod; 18. Telescopic rod; 19. Scraper. Detailed Implementation

[0028] This specific embodiment is a multi-stage sand and gravel screening device, the structural diagram of which is shown below. Figure 1-6 As shown, the screening device includes a screening base 1, a screening box 2, and a screen assembly 3. The screen assembly 3 is installed on the inner wall of the screening box 2 at the top of the screening base 1. A vibration motor 4 is installed on the surface of the screening box 2. An active brush roller 5 and a driven brush roller 6 are respectively provided on the inner wall of the screening box 2. The active brush roller 5 and the driven brush roller 6 are respectively connected to the screening box 2 through a first bearing 7 so that the active brush roller 5 and the driven brush roller 6 can rotate inside the screening box 2. The lowest end of the active brush roller 5 and the driven brush roller 6 is in contact with the top screen surface of the screen assembly 3.

[0029] The active brush roller 5 is connected to an active pulley 8 at one end, and the driven brush roller 6 is connected to a driven pulley 9 at one end. A belt ring 10 is fitted onto the surfaces of the active pulley 8 and the driven pulley 9. A drive motor 11 connected to the screening base 1 is installed at the other end of the active brush roller 5. The active pulley 8 and the driven pulley 9 form a linkage structure through the belt ring 10.

[0030] In addition, a power motor 12 is installed at the bottom of the screen assembly 3. The output end of the power motor 12 is connected to a threaded rod 13. The end of the threaded rod 13 is sleeved with a second bearing 14 that fits into the inner wall of the screening box 2. A threaded sleeve 15 is sleeved on the surface of the threaded rod 13. An adjusting plate 16 is connected to the bottom surface of the threaded sleeve 15. A guide rod 17 connected to the inner wall of the screening box 2 passes through the interior of the adjusting plate 16. A telescopic rod 18 is installed on the side surface of the adjusting plate 16. A scraper 19 is connected to the output end of the telescopic rod 18 so that the telescopic rod 18 drives the scraper 19 to move axially. When the scraper 19 moves to the bottom of its stroke, the bottom side of the scraper 19 moves to the bottom side of the inner wall of the screening box 2.

[0031] Working principle: When using the device of this technical solution, large sand and gravel particles will slide on the upper screen surface of the screen assembly 3. At this time, the drive motor 11 can be run. When the drive motor 11 runs, it can drive the active brush roller 5 to rotate. When the active brush roller 5 rotates, it can drive the active pulley 8 to rotate. When the active pulley 8 rotates, it can drive the driven pulley 9 to rotate through the belt ring 10. When the driven pulley 9 rotates, it can drive the driven brush roller 6 to rotate. When the large sand and gravel particles run to the bottom side of the active brush roller 5 and the driven brush roller 6, the active brush roller 5 and the driven brush roller 6 can separate the small sand and gravel particles attached to the surface of the large sand and gravel particles through the friction of the bristles. The small sand and gravel particles can be screened through the screen assembly 3, thereby screening sand and gravel particles of different sizes.

[0032] When small gravel accumulates on the bottom side of the inner wall of the screening box 2, the telescopic rod 18 can be operated. When the telescopic rod 18 extends, it can drive the scraper 19 to move downward. When the scraper 19 moves to the bottom surface of the screening box 2, the power motor 12 can be operated. When the power motor 12 runs, it can drive the threaded rod 13 to rotate. Under the limiting action of the guide rod 17, when the threaded rod 13 rotates, it can drive the threaded sleeve 15 to move along the central axis of the threaded rod 13 through the threaded connection. The movement of the threaded sleeve 15 can drive the adjusting plate 16 to move. The lateral movement of the adjusting plate 16 can drive the scraper 19 to move towards the other end of the screening box 2 through the telescopic rod 18. Thus, the scraper 19 can push the accumulated small gravel to the discharge port for easy discharge.

[0033] All technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A multi-stage sand and gravel screening device, comprising a screening base (1), a screening box (2), and a screen assembly (3), characterized in that, A screen assembly (3) is installed on the inner wall of the screening box (2) at the top of the screening base (1). A vibration motor (4) is installed on the surface of the screening box (2). An active brush roller (5) and a driven brush roller (6) are respectively provided on the inner wall of the screening box (2). The active brush roller (5) and the driven brush roller (6) are respectively connected to the screening box (2) through a first bearing (7) so that the active brush roller (5) and the driven brush roller (6) can rotate inside the screening box (2). The lowest end of the active brush roller (5) and the driven brush roller (6) are in contact with the top screen surface of the screen assembly (3). The bottom of the screen assembly (3) is equipped with a power motor (12), the output end of the power motor (12) is connected to a threaded rod (13), and the end of the threaded rod (13) is connected to the inner wall of the screening box (2) through a second bearing (14); The threaded rod (13) is fitted with a threaded sleeve (15), and an adjusting plate (16) is connected to the bottom surface of the threaded sleeve (15). A guide rod (17) connected to the inner wall of the screening box (2) passes through the interior of the adjusting plate (16). The side surface of the adjusting plate (16) is equipped with a telescopic rod (18), and the output end of the telescopic rod (18) is connected to a scraper (19). When the scraper (19) moves to the bottom of its stroke, the bottom side of the scraper (19) abuts against the bottom side of the inner wall of the screening box (2).

2. The multi-stage screening device for sand and gravel according to claim 1, characterized in that, The active brush roller (5) is connected to an active pulley (8) at one end, and the driven brush roller (6) is connected to a driven pulley (9) at one end. A belt ring (10) is fitted onto the surfaces of the active pulley (8) and the driven pulley (9). A drive motor (11) connected to the screening base (1) is installed at the other end of the active brush roller (5).

3. The multi-stage screening device for sand and gravel according to claim 2, characterized in that, The driving pulley (8) and the driven pulley (9) are linked together by a belt ring (10).

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