Anti-blocking type sandstone aggregate automatic screening and feeding device
By employing a combination of rotation and vibration in the sand and gravel aggregate screening equipment, centrifugal force and shearing force are used to prevent screen clogging, thus solving the clogging problem of traditional equipment and achieving efficient grading and screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional sand and gravel aggregate screening equipment is prone to clogging, has low screening efficiency, and high maintenance costs.
It adopts a semi-circular fixed cover and screen cylinder structure, combined with rotation and vibration, and uses centrifugal force and shear force to prevent screen hole clogging, and achieves graded screening through screen holes of different diameters.
It enables continuous and efficient grading and screening of sand and gravel aggregates, prevents screen clogging, and improves screening efficiency and equipment stability.
Smart Images
Figure CN224072567U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete production technology, specifically to an anti-clogging automatic screening and feeding device for sand and gravel aggregates. Background Technology
[0002] Sand and gravel aggregates are indispensable basic materials in the construction of infrastructure such as buildings, roads, and bridges. They are mainly made from natural rocks or ores through crushing, screening and other processes. According to particle size, they can be divided into coarse aggregates (such as crushed stone and pebbles) and fine aggregates (such as river sand and manufactured sand).
[0003] In the field of sand and gravel aggregate screening, traditional screening equipment has long faced problems such as screen hole clogging, low screening efficiency, and high maintenance costs. Clogged screen holes not only reduce screening efficiency but also decrease the screening rate. To address this, we propose an anti-clogging automatic screening and feeding device for sand and gravel aggregates. Utility Model Content
[0004] The purpose of this invention is to provide an anti-clogging automatic screening and feeding device for sand and gravel aggregates to address the aforementioned shortcomings in the technology.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An anti-clogging automatic screening and feeding device for sand and gravel aggregates includes a semi-circular fixed cover and a screening cylinder. The screening cylinder is located inside the semi-circular fixed cover. Four bearings are fixedly arranged at equal intervals on the outer wall of the screening cylinder. The outer walls of the bearings are fixedly connected to the inner wall of the screening cylinder. Semi-circular fixed rings are fixedly installed at both ends of the top of the semi-circular fixed cover. A motor is fixedly installed at one end of the top of the semi-circular fixed ring. The output shaft of the motor is fixedly connected to a rotating shaft through a coupling. Two drive gears are fixedly installed on the outer wall of the rotating shaft. Two toothed rings are fixedly installed on the outer wall of the screening cylinder. The outer walls of the drive gears mesh with the outer walls of the toothed rings. Two vibrating motors are fixedly installed on the bottom outer wall of the semi-circular fixed cover.
[0007] Preferably, the semi-circular fixed cover and the screen cylinder are inclined downwards at an angle of 5-8°. The screen cylinder has an inlet and an outlet at both ends. The inlet is located at the upwardly inclined end of the screen cylinder, and the outlet is located at the downwardly inclined end of the screen cylinder.
[0008] Preferably, the outer wall of the screening cylinder is provided with a first screening hole, a second screening hole and a third screening hole that are equally spaced apart. The first screening hole, the second screening hole and the third screening hole are located between adjacent bearings. The diameter of the first screening hole is smaller than the diameter of the second screening hole, and the diameter of the second screening hole is smaller than the diameter of the third screening hole.
[0009] Preferably, the bottom outer wall of the semi-circular fixed cover is fixed with three storage bins through an opening, the bottom of the three storage bins are connected to a discharge pipe, and a gate is inserted into one side of the outer wall of the discharge pipe through an opening. The three storage bins are respectively located at the bottom of the first screen hole, the second screen hole and the third screen hole.
[0010] Preferably, the front and rear ends of the semi-circular fixing cover are fixedly provided with fixing plates, the outer wall of the fixing plate is fixedly provided with an upper sleeve through an opening, the bottom of the upper sleeve is provided with a lower sleeve, the inner wall of the upper sleeve is fixedly provided with a vertically downward vibration spring, and the bottom of the vibration spring is fixed to the top inner wall of the lower sleeve.
[0011] Preferably, the bottom outer wall of the four lower sleeves is fixed with vertically downward supporting legs.
[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:
[0013] The automatic screening and feeding device for sand and gravel aggregates of this utility model uses the combined action of rotation and vertical vibration of the screen cylinder to keep the material in a rolling and dispersed state during the screening process. The centrifugal force generated by the circumferential rotation causes the aggregate to slide along the screen surface, preventing it from accumulating statically at the screen holes and thus preventing the holes from clogging. When the aggregate is embedded in the screen hole, the shearing force generated by the rotational motion, combined with the vibration effect, can automatically peel off the particles stuck at the edge of the screen hole, further preventing the screen holes from clogging. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0015] Figure 1 This is a three-dimensional structural diagram of an anti-clogging automatic screening and feeding device for sand and gravel aggregates according to the present invention;
[0016] Figure 2 This is a schematic diagram of the semi-arc-shaped fixed cover structure of an anti-clogging automatic screening and feeding device for sand and gravel aggregates according to this utility model;
[0017] Figure 3 This is a schematic diagram of the screen cylinder structure of an anti-clogging automatic screening and feeding device for sand and gravel aggregates according to this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Semi-circular fixed cover, 2. Screen cylinder, 3. Bearing, 4. Semi-circular fixed ring, 5. Motor, 6. Rotary shaft, 7. Drive gear, 8. Gear ring, 9. First screen hole, 10. Second screen hole, 11. Third screen hole, 12. Vibration motor, 13. Storage bin, 14. Discharge pipe, 15. Gate, 16. Fixed plate, 17. Upper sleeve, 18. Lower sleeve, 19. Vibration spring, 20. Support legs. Detailed Implementation
[0020] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.
[0021] Refer to the instruction manual appendix Figure 1-3 This utility model is an anti-clogging automatic screening and feeding device for sand and gravel aggregates. Its main components include a semi-arc fixed cover 1 and a screening cylinder 2. The screening cylinder 2 is installed inside the semi-arc fixed cover 1. Four bearings 3 are fixed at equal intervals on the outer wall of the screening cylinder 2. The outer wall of the bearings 3 contacts the inner wall of the semi-arc fixed cover 1 to achieve rotational support. Semi-arc fixed rings 4 are fixed at both ends of the top of the semi-arc fixed cover 1. A motor 5 is installed at one end of the top of the semi-arc fixed ring 4. The output shaft of the motor 5 is connected to a rotating shaft 6 through a coupling. Two drive gears 7 are fixed on the outer wall of the rotating shaft 6. Two toothed rings 8 are fixed on the outer wall of the screening cylinder 2. The outer wall of the drive gears 7 meshes with the outer wall of the toothed rings 8. The rotating shaft 6 is driven to rotate by the motor 5, thereby driving the drive gears 7 to rotate. In turn, the toothed rings 8 and the screening cylinder 2 achieve rotational movement under the support of the bearings 3.
[0022] Two vibration motors 12 are installed on the bottom outer wall of the semi-circular fixed cover 1. The two vibration motors 12 vibrate the semi-circular fixed cover 1 and the screening cylinder 2 to assist in the screening of sand and gravel.
[0023] The semi-circular fixed cover 1 and the screen cylinder 2 are inclined downwards at an angle of 5°. The screen cylinder 2 has an inlet and an outlet at both ends. The inlet is located at the upward-inclined end of the screen cylinder 2, and the outlet is located at the downward-inclined end, which facilitates the automatic flow and screening of aggregates. The outer wall of the screen cylinder 2 has a first screen hole 9, a second screen hole 10, and a third screen hole 11 that are evenly distributed and located between adjacent bearings 3. The diameters of the first screen hole 9, the second screen hole 10, and the third screen hole 11 increase sequentially to achieve the grading and screening of aggregates of different particle sizes. The bottom outer wall of the semi-circular fixed cover 1 has three storage bins 13 fixed through openings. The bottom of the three storage bins 13 is connected to a discharge pipe 14. A gate 15 is inserted into one side of the outer wall of the discharge pipe 14. The three storage bins 13 are located at the bottom of the first screen hole 9, the second screen hole 10, and the third screen hole 11, respectively, and are used to collect and store aggregates of different particle sizes.
[0024] The front and rear ends of the semi-circular fixed cover 1 are fixed with fixed plates 16. The outer wall of the fixed plate 16 is fixed with an upper sleeve 17 through an opening. The bottom of the upper sleeve 17 is provided with a lower sleeve 18. The inner wall of the upper sleeve 17 is fixed with a vertically downward vibration spring 19. The bottom of the vibration spring 19 is fixed to the top inner wall of the lower sleeve 18. The bottom outer walls of the four lower sleeves 18 are fixed with vertically downward support legs 20. The present invention is placed in a designated position by means of the support legs 20.
[0025] Refer to the instruction manual appendix Figure 1-3 When the feeding device of this utility model is in automatic screening of sand and gravel aggregates, the motor 5 drives the rotating shaft 6 through the coupling to drive the drive gear 7 to rotate. The drive gear 7 meshes with the toothed ring 8 on the outer wall of the screen cylinder 2, causing the screen cylinder 2 to rotate slowly. At the same time, the bottom vibration motor 12 generates high-frequency vibration in the vertical direction. The dual motion causes the sand and gravel aggregates entering the feed inlet to continuously tumble and disperse in the inclined screen cylinder 2.
[0026] The aforementioned materials first pass through the first screen hole 9 with the smallest aperture. Fine aggregates fall through the screen holes into the corresponding storage bin 13. Larger particles continue to move with the screen cylinder 2 to the area of the second screen hole 10. Medium-sized aggregates are screened into the intermediate storage bin 13. The remaining large aggregates finally fall into the end storage bin 13 through the third screen hole 11.
[0027] During the screening process, the vibration spring 19 between the semi-circular fixed cover 1 and the screening cylinder 2 effectively buffers the vibration and maintains the stability of the equipment. The discharge pipe 14 at the bottom of each storage bin 13 controls the discharge speed through the gate 15 to prevent overflow. When the screening cylinder 2 rotates to a specific angle, the material that is not completely screened can re-enter the screening area through circumferential movement. The screening effect is good, realizing continuous and efficient automatic grading screening and feeding of sand and gravel aggregates.
[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A kind of anti-blocking sand aggregate automatic screening feeding device, including semi-arc fixed cover (1) and screening cylinder (2), the screening cylinder (2) is located in the inside of semi-arc fixed cover (1), it is characterized by: The outer wall of the screening cylinder (2) is fixedly provided with four equidistantly distributed bearings (3), the outer wall of the bearing (3) is fixedly connected with the inner wall of the screening cylinder (2), the top of the semi-arc fixed cover (1) is fixedly provided with a semi-arc fixed ring (4), one end of the top of the semi-arc fixed ring (4) is fixedly provided with an electric motor (5), the output shaft of the electric motor (5) is fixedly provided with a rotating shaft (6) through a shaft coupling, the outer wall of the rotating shaft (6) is fixedly provided with two driving gears (7), the outer wall of the screening cylinder (2) is fixedly provided with two toothed rings (8), the outer wall of the driving gear (7) is engaged with the outer wall of the toothed ring (8), and the bottom outer wall of the semi-arc fixed cover (1) is fixedly provided with two vibration motors (12).
2. The anti-blocking sand and gravel aggregate automatic screening and feeding device according to claim 1, characterized in that: The semi-arc fixed cover (1) and the screening cylinder (2) are in an inclined downward structure, the inclination angle is 5-8°, the two ends of the screening cylinder (2) comprise a feeding port and a discharging port, the feeding port is located at the end of the screening cylinder (2) inclined upward, and the discharging port is located at the end of the screening cylinder (2) inclined downward.
3. The anti-blocking sand and gravel aggregate automatic screening and feeding device according to claim 1, characterized in that: The outer wall of the screening cylinder (2) is respectively provided with equidistantly distributed first screening holes (9), second screening holes (10) and third screening holes (11), the first screening holes (9), the second screening holes (10) and the third screening holes (11) are respectively located between adjacent bearings (3), the aperture of the first screening hole (9) is smaller than the aperture of the second screening hole (10), and the aperture of the second screening hole (10) is smaller than the aperture of the third screening hole (11).
4. The anti-blocking sand and gravel aggregate automatic screening and feeding device according to claim 3, characterized in that: The bottom outer wall of the semi-arc fixed cover (1) is fixedly provided with three storage bins (13) through openings, the bottom of each of the three storage bins (13) is communicated with a discharging pipe (14), the outer wall of one side of the discharging pipe (14) is inserted with a gate (15) through an opening, and the three storage bins (13) are respectively located at the bottom of the first screening hole (9), the second screening hole (10) and the third screening hole (11).
5. The anti-blocking sand and gravel aggregate automatic screening and feeding device according to claim 1, characterized in that: The front and rear ends of the semi-arc fixed cover (1) are fixedly provided with fixed plates (16), the outer wall of the fixed plate (16) is fixedly provided with an upper sleeve (17) through an opening, the bottom of the upper sleeve (17) is provided with a lower sleeve (18), the inner wall of the upper sleeve (17) is fixedly provided with a vertically downward vibration spring (19), and the bottom of the vibration spring (19) is fixed to the top inner wall of the lower sleeve (18).
6. The anti-blocking sand and gravel aggregate automatic screening and feeding device according to claim 5, characterized in that: The bottom outer wall of each of the four lower sleeves (18) is fixedly provided with a vertically downward supporting leg (20).