Aggregate multi-stage crushing and screening device capable of adjusting particle size
By using a multi-stage crushing and screening device with adjustable particle size, the problems of limited particle size adjustment capability and insufficient multi-stage screening efficiency of screening equipment are solved, and efficient and accurate aggregate particle size separation is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-04-14
AI Technical Summary
Existing screening equipment has limited ability to adjust the screening particle size, requiring shutdown to replace the screens. Furthermore, the material conveying and separation efficiency in multi-stage screening processes is insufficient, leading to decreased screening accuracy and severe mixing.
The device employs a multi-stage crushing and screening unit with adjustable particle size. It achieves multi-stage screening of aggregates through aperture adjustment components and conveying mechanisms. Combined with toothed plate meshing and dynamic tumbling of the spiral conveyor blades, it ensures screening accuracy and efficiency.
It enables convenient particle size adjustment, improves screening accuracy and efficiency, avoids material mixing, and meets the screening needs of different particle sizes.
Smart Images
Figure CN224114178U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening technology, and more specifically, to a multi-stage crushing and screening device for aggregates with adjustable particle size. Background Technology
[0002] Construction waste recycled aggregate crushing refers to the process of crushing and processing waste concrete blocks produced from building demolition, road resurfacing, concrete production, etc., into small-particle recycled aggregates. The aggregates are divided into coarse aggregates and fine aggregates. Coarse aggregates refer to materials with a diameter greater than 5mm. Coarse aggregates are further divided into multiple grades, such as 10-15mm, 15mm-20mm, and other sizes. During the crushing process, the recycled aggregates are screened by a screening device to facilitate subsequent use by users.
[0003] In the aggregate processing industry, accurate screening of aggregate particle size is a crucial step affecting product quality. Existing screening equipment generally suffers from two major pain points:
[0004] On the one hand, traditional screening devices mostly use screen structures with fixed apertures, which limits the ability to adjust the screening particle size. When production needs change (such as the need for different specifications of coarse and fine aggregates), the machine needs to be stopped to disassemble and replace the screens, which is cumbersome and time-consuming, seriously affecting production efficiency, and is especially difficult to adapt to flexible production scenarios with multiple varieties and small batches.
[0005] On the other hand, the material conveying and separation efficiency of multi-stage screening processes is insufficient. In traditional equipment, aggregates typically move solely by gravity or simple conveying mechanisms, lacking a dynamic tumbling and mixing mechanism. This leads to particles squeezing and clogging the screen holes, preventing fine particles from passing through the screen and leaving coarse particles as residue, resulting in decreased screening accuracy. Furthermore, the fixed screening stages in existing equipment cause aggregates of different sizes to easily mix again during discharge, further reducing screening effectiveness.
[0006] Therefore, a multi-stage crushing and screening device for aggregates with adjustable particle size is proposed. Utility Model Content
[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides an adjustable particle size multi-stage crushing and screening device for aggregates to solve the problems mentioned in the background art.
[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage aggregate crushing and screening device with adjustable particle size, comprising a screening box, support legs on both sides of the screening box, a crushing chamber installed at one end of the screening box, a discharge port at the top of the crushing chamber, a crushing mechanism installed inside the crushing chamber, an inner screen cylinder connected to the crushing chamber below the crushing mechanism, a conveying mechanism installed inside the inner screen cylinder, a first screen barrel sleeved on the inner screen cylinder, a second screen barrel installed on one side of the first screen barrel, a third screen barrel installed on one side of the second screen barrel, toothed plates installed at the top of one end of the first screen barrel, multiple fixing plates installed at the top of the screening box, and aperture adjustment components installed on each fixing plate, the bottom end of each aperture adjustment component engaging with the corresponding toothed plate.
[0009] Preferably, the first, second, and third sieve barrels are provided with sieve holes of different sizes, which are respectively matched with sieve holes at different positions on the inner sieve cylinder.
[0010] Preferably, the bottom of the screening box is provided with multiple partitions, and a first discharge port, a second discharge port and a third discharge port are respectively provided between two adjacent partitions.
[0011] Preferably, the conveying mechanism includes a first motor, a rotating rod, and a spiral conveying blade. The first motor is installed outside the crushing chamber, and the output end of the first motor is connected to the rotating rod. The spiral conveying blade, which is configured to cooperate with the inner screen cylinder, is installed on the rotating rod.
[0012] Preferably, the aperture adjustment assembly includes a second motor, a drive rod, a drive pulley, a shaft, a gear, a follower pulley, and a belt. The second motor is mounted on a fixed plate, and the output end of the second motor is connected to the drive rod. The drive pulley is mounted on the drive rod, and a gear that meshes with a gear plate is mounted on the shaft. A follower pulley is coaxially arranged on one side of the gear, and a belt connects the follower pulley and the drive pulley.
[0013] Preferably, a fixing frame is installed at one bottom of each of the fixing plates, and one end of the corresponding shaft is rotatably mounted on the fixing frame.
[0014] The technical effects and advantages of this utility model are as follows:
[0015] By cooperating with the screen holes of the first, second, and third screen barrels and the inner screen cylinder, multi-stage screening of fine, medium, and large aggregate particles can be achieved. The remaining unscreenable material is discharged from the fourth discharge port, resulting in high screening efficiency. Furthermore, in conjunction with the second motor driving gear and toothed plate in the aperture adjustment component, the screen barrel is rotated, causing the screen holes of the screen barrel and the inner screen cylinder to be misaligned. This allows for convenient adjustment of the aperture at each screening stage, meeting the screening requirements of different particle sizes and improving the screening accuracy of aggregate particle size.
[0016] The first motor of the conveying mechanism drives the spiral conveyor blades to rotate, pushing the aggregate to tumble and move inside the inner screen cylinder, promoting the separation of aggregates of different particle sizes, avoiding accumulation, and improving screening efficiency and accuracy. The bottom partition of the screening box isolates each discharge port, so that aggregates of different particle sizes are discharged from the corresponding discharge port, preventing mixing and ensuring the effectiveness of screening.
[0017] By using a fixed support frame to support the shaft, stable meshing between the gear and the toothed plate is ensured, thereby improving the structural stability and adjustment accuracy of the aperture adjustment process. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the screening box of this utility model.
[0020] Figure 3 This is a schematic diagram showing the connection structure of each sieve barrel of this utility model with its corresponding aperture adjustment component.
[0021] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.
[0022] Figure 5 This is a schematic diagram of the conveying mechanism of this utility model.
[0023] The attached figures are labeled as follows: 1. Screening box; 2. Crushing chamber; 3. Discharge port; 4. Crushing mechanism; 5. Conveying mechanism; 501. First motor; 502. Rotating rod; 503. Spiral conveyor blade; 6. First discharge port; 7. Second discharge port; 8. Third discharge port; 9. Fourth discharge port; 10. Fixed plate; 11. Aperture adjustment assembly; 1101. Second motor; 1102. Drive rod; 1103. Drive pulley; 1104. Shaft; 1105. Gear; 1106. Follower pulley; 1107. Belt; 12. Support leg; 13. First screen barrel; 14. Second screen barrel; 15. Third screen barrel; 16. Inner screen cylinder; 17. Partition plate; 18. Toothed plate. 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] As attached Figure 1-5The present invention discloses an adjustable particle size multi-stage aggregate crushing and screening device, comprising a screening box 1, with support legs 12 on both sides of the screening box 1, a crushing chamber 2 installed at one end of the screening box 1, a discharge port 3 at the top of the crushing chamber 2, a crushing mechanism 4 installed inside the crushing chamber 2, an inner screen cylinder 16 connected to the crushing chamber 2 below the crushing mechanism 4, a conveying mechanism 5 installed inside the inner screen cylinder 16, a first screen barrel 13 sleeved on the inner screen cylinder 16, a second screen barrel 14 on one side of the first screen barrel 13, and a third screen barrel 15 on one side of the second screen barrel 14. Toothed plates 18 are installed at the top of one end of the first screen barrel 13, the second screen barrel 14, and the third screen barrel 15. Multiple fixed plates 10 are installed at the top of the screening box 1, and each fixed plate 10 is equipped with an aperture adjustment component 11, the bottom end of each aperture adjustment component 11 being engaged with the corresponding toothed plate 18.
[0026] In practice, the raw material is fed into the crushing chamber 2 from the discharge port 3, crushed by the crushing mechanism 4, and then falls into the inner screen cylinder 16. It is then conveyed by the conveying mechanism 5, causing the crushed material to move from one end of the inner screen cylinder 16 towards the fourth discharge port 9. During this movement, fine particles are screened out when passing the first screen barrel 13, medium particles are screened out when passing the second screen barrel 14, and large particles are screened out when passing the third screen barrel 15. Finally, the remaining unscreened material is discharged from the fourth discharge port 9. When it is necessary to adjust the screening size of each particle, the corresponding screen barrel is rotated by the operation of the aperture adjustment components 11. This causes the screen holes on the screen barrel to be misaligned with the screen holes on the inner screen cylinder 16, thereby changing the screening aperture. This allows different screening sections to screen out the corresponding aggregate particles, improving the aggregate particle size screening accuracy. The adjustment is convenient, improving ease of use and meeting the screening needs of different particle sizes.
[0027] The first sieve barrel 13, the second sieve barrel 14 and the third sieve barrel 15 are respectively provided with sieve holes of different sizes, and respectively cooperate with sieve holes at different positions on the inner sieve barrel 16.
[0028] The bottom of the screening box 1 is provided with multiple partitions 17, and a first discharge port 6, a second discharge port 7 and a third discharge port 8 are respectively provided between two adjacent partitions 17.
[0029] In practice, by setting the first discharge port 6, the second discharge port 7 and the third discharge port 8, and using the partitions 17 on both sides to rotate and support the corresponding screen barrels, the aggregates screened by each screen barrel can fall separately and be isolated by the partitions 17, and discharged from the corresponding discharge ports, thus avoiding the materials from mixing again after screening and improving the effectiveness of screening.
[0030] The conveying mechanism 5 includes a first motor 501, a rotating rod 502, and a spiral conveying blade 503. The first motor 501 is installed on the outside of the crushing chamber 2. The output end of the first motor 501 is connected to the rotating rod 502. The spiral conveying blade 503, which is configured to cooperate with the inner screen cylinder 16, is installed on the rotating rod 502.
[0031] In practice, the operation of the first motor 501 causes the rotating rod 502 to drive the spiral conveyor blade 503 to rotate. As the spiral conveyor blade 503 rotates, it can transport the crushed aggregate that falls into the inner screen cylinder 16. During the movement of the aggregate, it passes through screen holes of different sizes, thus achieving multi-stage screening. Through the conveying of the spiral conveyor blade 503, the aggregate can tumble and move at the same time, which facilitates the separation of aggregates of different particle sizes, improves screening efficiency, avoids aggregate accumulation, and thus improves screening accuracy.
[0032] The aperture adjustment assembly 11 includes a second motor 1101, a drive rod 1102, a drive pulley 1103, a shaft 1104, a gear 1105, a follower pulley 1106, and a belt 1107. The second motor 1101 is mounted on the fixed plate 10. The output end of the second motor 1101 is connected to the drive rod 1102. The drive pulley 1103 is mounted on the drive rod 1102. The gear 1105, which meshes with the gear plate 18, is mounted on the shaft 1104. The follower pulley 1106 is coaxially arranged on one side of the gear 1105. The belt 1107 connects the follower pulley 1106 and the drive pulley 1103.
[0033] In practice, the second motor 1101 operates, causing the drive rod 1102 to drive the drive pulley 1103 to rotate. Under the connection of the belt 1107, the follower pulley 1106 drives the shaft 1104 to rotate, which in turn causes the gear 1105 to drive the toothed plate 18 to rotate. This allows the corresponding screen barrel to rotate on the inner screen cylinder 16, causing the screen holes of the screen barrel to be misaligned with the screen holes on the inner screen cylinder 16. This allows the diameter of the discharge screen holes to be changed, making it easy to adjust the diameter of the screen holes at different positions according to needs, so as to screen out aggregates of different particle sizes.
[0034] Each of the fixed plates 10 has a fixed frame installed at one bottom end, and one end of the corresponding shaft 1104 is rotatably mounted on the fixed frame.
[0035] In practice, the mounting position of the shaft 1104 is fixed by a fixing bracket, which ensures that while the shaft 1104 rotates, the gear 1105 remains engaged with the gear plate 18, thereby improving the stability of the structure and ensuring the accuracy of the aperture adjustment.
[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A multi-stage crushing and screening device for aggregates with adjustable particle size, comprising a screening box (1), characterized in that: The screening box (1) is provided with support legs (12) on both sides. A crushing chamber (2) is installed at one end of the screening box (1). A discharge port (3) is provided at the top of the crushing chamber (2). A crushing mechanism (4) is installed inside the crushing chamber (2). An inner screen cylinder (16) communicating with the crushing chamber (2) is provided below the crushing mechanism (4). A conveying mechanism (5) is installed inside the inner screen cylinder (16). A first screen barrel (13) is sleeved on the inner screen cylinder (16). A second sieve barrel (14) is provided on one side of the first sieve barrel (13), and a third sieve barrel (15) is provided on one side of the second sieve barrel (14). A toothed plate (18) is installed on the top of one end of the first sieve barrel (13), the second sieve barrel (14), and the third sieve barrel (15). A plurality of fixed plates (10) are installed on the top of the screening box (1). A aperture adjustment component (11) is installed on each fixed plate (10). The bottom end of each aperture adjustment component (11) is engaged with the corresponding toothed plate (18).
2. The adjustable particle size multi-stage crushing and screening device for aggregates according to claim 1, characterized in that: The first sieve barrel (13), the second sieve barrel (14) and the third sieve barrel (15) are respectively provided with sieve holes of different sizes, and respectively cooperate with sieve holes at different positions on the inner sieve barrel (16).
3. The adjustable particle size multi-stage crushing and screening device for aggregates according to claim 2, characterized in that: The bottom of the screening box (1) is provided with multiple partitions (17), and a first discharge port (6), a second discharge port (7) and a third discharge port (8) are respectively provided between two adjacent partitions (17).
4. The adjustable particle size multi-stage crushing and screening device for aggregates according to claim 3, characterized in that: The conveying mechanism (5) includes a first motor (501), a rotating rod (502) and a spiral conveying blade (503). The first motor (501) is installed on the outside of the crushing chamber (2). The output end of the first motor (501) is connected to the rotating rod (502). The spiral conveying blade (503) that cooperates with the inner screen cylinder (16) is installed on the rotating rod (502).
5. The adjustable particle size multi-stage crushing and screening device for aggregates according to claim 4, characterized in that: The aperture adjustment assembly (11) includes a second motor (1101), a drive rod (1102), a drive pulley (1103), a shaft (1104), a gear (1105), a follower pulley (1106), and a belt (1107). The second motor (1101) is mounted on a fixed plate (10). The output end of the second motor (1101) is connected to the drive rod (1102). The drive rod (1102) is equipped with a drive pulley (1103). The shaft (1104) is equipped with a gear (1105) that meshes with the toothed plate (18). The follower pulley (1106) is coaxially arranged on one side of the gear (1105). The follower pulley (1106) and the drive pulley (1103) are connected by a belt (1107).
6. The adjustable particle size multi-stage crushing and screening device for aggregates according to claim 5, characterized in that: Each of the fixed plates (10) has a fixed frame installed at one end of its bottom, and one end of the corresponding shaft (1104) is rotatably mounted on the fixed frame.