Abrasive particle screening device

Abstract

The utility model belongs to abrasive wheel manufacturing technical field discloses a kind of abrasive particle screening devices, including the drum of inclined arrangement;Output pipe is connected to the lower end of feed hopper and in-depth the inside of drum, the lower side of the low end of drum is equipped with receiving hopper;Swing box is equipped directly below the drum;The swing box includes upper sieve plate and lower sieve plate, and the side plate of fixed connection in the periphery of upper sieve plate and lower sieve plate;The upper sieve plate has multiple spaced even distribution's upward protruding corrugated strip;The side of corrugated strip towards receiving hopper is inclined plane, and its side towards feed hopper is vertical face;The screen hole of two sieve plates is less than the screen hole of drum;The swing box is connected with driving mechanism;Belt conveying mechanism is equipped below the swing box.The utility model's two-stage screening mechanism cooperation, with larger screening area, can actively discharge large particle, reduce the occupation of screen hole, screen hole is not easy to block, screening quality is good, and efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of grinding wheel manufacturing technology and relates to an abrasive particle screening device. Background Technology

[0002] Abrasive is one of the basic raw materials for producing grinding wheels. Due to the different requirements for grinding performance in different applications, the requirements for abrasive particle size also vary. Therefore, it is often necessary to use sorting sieves to screen and classify the abrasive. Because the required qualified abrasive particles are small and the sieve holes are small, they are prone to clogging, affecting screening efficiency and screening quality.

[0003] To overcome the problem of easy clogging of screen holes, existing screening devices, such as the one described in patent CN120325530A entitled "A Classification and Screening Device for Abrasive Particles," utilize air blowing and pushing to reduce the probability of screen hole clogging. However, the problems are as follows: First, the working area of ​​each screen plate is small, and air blowing and pushing reduce the throughput of the screen holes, affecting particle passage and reducing screening quality, making it difficult to separate particles of different sizes in one pass. Second, both the air blowing and pushing mechanisms occupy the working area of ​​the screen plates, affecting screening efficiency. Third, during operation, the amount of particles screened in a batch is determined by the capacity of the top-level screen plate, resulting in a low capacity for single screening and requiring frequent refilling. Fourth, the top-level screen plate retains a large number of unqualified large-diameter particles. These large particles slide on the screen plate only by gravity, lingering there for a long time. These large particles block the screen holes, preventing small particles from passing through, and unscreened small particles are discharged along with the large particles through the discharge chute, further reducing screening quality. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an abrasive particle screening device. The purpose is to avoid screen hole clogging, set a large-capacity screen cylinder to increase the screening area, improve screening efficiency and increase the capacity of a single screening, reduce the frequency of filling, and cooperate with the oscillating screening mechanism to actively discharge large particles, reduce the occupation of screen holes by large particles, and improve the quality and efficiency of screening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an abrasive particle screening device, comprising a rotatable drum with open ends arranged at an incline, the sidewalls of which are densely covered with sieve holes; an output pipe connected to the lower end of a feed hopper extends into the interior of the drum from the open end on the high end side, and a receiving hopper is provided below the low end side of the drum; a swing box is provided directly below the drum; the swing box includes an upper sieve plate and a lower sieve plate arranged vertically and both having densely covered sieve holes, and side plates fixed to the periphery of the upper and lower sieve plates; the upper sieve plate has multiple evenly spaced, upwardly protruding corrugated strips; the side of the corrugated strips facing the receiving hopper is inclined, and the side facing the feed hopper is vertical; the sieve holes of the two sieve plates are smaller than the sieve holes of the drum; the swing box is connected to a drive mechanism for driving the swing box to swing back and forth in a horizontal posture; a belt conveyor mechanism is provided below the swing box for receiving the screened particle material.

[0006] As a further optimization, the roller has a mandrel at its center, and multiple support rods are fixed to the side wall of the mandrel. The end of each support rod is fixed to the inner wall of the roller, which is used to fix the mandrel and the roller into a whole. Both ends of the mandrel extend out of the roller and are connected to bearings. The bearings are connected to a support frame, which is used to rotatably suspend the roller above the swing box. One end of the mandrel is connected to a rotary motor, which is used to drive the mandrel to rotate.

[0007] As a further optimization, the drive mechanism includes two columns on each of the left and right sides of the swing box; each column has a bearing seat at its top; the four columns are divided into two groups, with the bearing seats on the two columns in each group respectively fitted onto the two ends of a crankshaft; the central axis of the crankshaft is eccentric to its two end axes; the central parts of the two crankshafts are rotatably connected to the swing box, which drives the swing box to swing back and forth in a horizontal posture when the two crankshafts rotate synchronously; one of the crankshafts is connected to a swing motor, which is connected to one end of the two crankshafts through a synchronous belt mechanism, for driving the two crankshafts to rotate synchronously.

[0008] As a further optimization, a non-porous area without the sieve holes is provided on one side of the lower end of the roller.

[0009] As a further optimization, upwardly extending side baffles are fixed to both sides of the swing box to block the left and right sides of the roller.

[0010] As a further optimization, the spindle is also connected to multiple swing arms; each swing arm has an elastic flap hinged at its end, and the end of the elastic flap abuts against the inner wall of the roller.

[0011] As a further optimization, multiple elastic balls are provided in the sealed space between the two sieve plates.

[0012] As a further optimization, the elastic ball is a hollow rubber ball.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the two-stage screening mechanism of this utility model has a large screening area, a large screening capacity in one go, can actively discharge large particles, reduce the occupation of the screen holes, the screen holes are not easy to clog, the screening quality is good, and the efficiency is high. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present invention, omitting the side baffle;

[0015] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention, omitting the belt conveyor mechanism;

[0016] Figure 3 This is a partial structural diagram of the corrugated strip according to an embodiment of the present invention.

[0017] The correspondence between the technical features in the figure and the reference numerals is as follows: 1. Roller; 11. Spindle; 12. Support rod; 13. Bearing; 14. Support frame; 15. Rotary motor; 16. Holeless area; 17. Swing arm; 18. Elastic sling; 2. Feed hopper; 21. Output pipe; 3. Receiving hopper; 4. Swing box; 41. Upper screen plate; 41. Corrugated strip; 411. Inclined surface; 412. Vertical surface; 413. Lower screen plate; 42. Column; 43. Bearing seat; 431. Crankshaft; 44. Swing motor; 45. Synchronous belt mechanism; 46. Side baffle; 47. Elastic ball; 48. Belt conveyor mechanism; 5. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model, and are not intended to limit the protection scope of this utility model.

[0019] Example: Please refer to Figure 1-3This utility model provides the following technical solution: An abrasive particle screening device includes a rotatable drum 1 with open ends arranged at an incline; the sidewalls of the drum 1 are densely covered with sieve holes; an output pipe 21 connected to the lower end of the feed hopper 2 extends into the interior of the drum 1 from the open end on the high end side; a receiving hopper 3 is provided below the low end side of the drum 1; a swing box 4 is provided directly below the drum 1; the swing box 4 includes an upper sieve plate 41 and a lower sieve plate 42 arranged vertically and both having densely covered sieve holes, and a device fixedly connected to the upper sieve plate 41. 1. Side plates around the lower screen plate 42; the upper screen plate 41 has multiple evenly spaced, upwardly protruding corrugated strips 411; the side of the corrugated strips 411 facing the receiving hopper 3 is an inclined surface 412, and the side facing the feeding hopper 2 is a vertical surface 413; the screen holes of the two screen plates are smaller than the screen holes of the roller 1; the swing box 4 is connected to a drive mechanism for driving the swing box 4 to swing back and forth in a horizontal posture; a belt conveyor mechanism 5 is provided below the swing box 4 for receiving the sieved granular material.

[0020] In use, the rotatable drum 1 serves as the primary screening mechanism, and the swing box 4 serves as the secondary screening mechanism. Its screen holes are smaller than those of the drum 1. When the drum 1 rotates, the screen holes on the circumferential side can rotate to the lower end in sequence to participate in screening. Under the same floor space conditions, it has a larger screening area, which initially filters out large particles and discharges them into the receiving hopper 3 from the lower end of the drum 1. Since the drum 1 is rolling, large particles will not occupy the screen holes for a long time, ensuring the passage of small particles and avoiding blockage. In the secondary screening mechanism, the reciprocating oscillating box 4 drives the upper screen plate 41 to move synchronously. During screening, it continuously throws large particles up, preventing them from occupying the screen holes for extended periods and increasing the chances of small particles passing through, thus improving screening efficiency. Secondly, while throwing up large particles, the inclined corrugated strips 411 on one side continuously push the large particles towards the receiving hopper 3 until they are discharged from the upper screen plate 41, actively discharging large particles and reducing their occupation of the screen holes, allowing small particles to pass through more smoothly. Furthermore, the continuous oscillation of the oscillating box 4 causes the two screen plates to vibrate, reducing the probability of screen blockage even if small particles accumulate at the screen holes. Based on this, the device has a large screening area, actively discharges large particles, reduces the occupation of the screen holes, is less prone to clogging, and provides good screening quality and high efficiency.

[0021] To enable the roller 1 to rotate, an exemplary structure includes a mandrel 11 at the center of the roller 1, with multiple support rods 12 fixedly connected to the side walls of the mandrel 11. The end of each support rod 12 is fixedly connected to the inner wall of the roller 1, serving to connect the mandrel 11 and the roller 1 as a whole. Both ends of the mandrel 11 extend outside the roller 1 and are connected to bearings 13. The bearings 13 are connected to support frames 14, allowing the roller 1 to be rotatably suspended above the swing box 4. One end of the mandrel 11 is connected to a rotary motor 15 to drive the mandrel 11 to rotate. The two support frames 14 have different heights, resulting in the roller 1 being tilted with one end higher than the other.

[0022] There are many existing technologies that drive the swing box 4 to swing. In this embodiment, the preferred driving mechanism includes two columns 43 on each of the left and right sides of the swing box 4; each column 43 has a bearing seat 431 at its top; the four columns 43 are divided into two groups, with the bearing seats 431 on the two columns in each group respectively fitted onto the two ends of a crankshaft 44; the central axis of the crankshaft 44 is eccentric to its two end axes; the central parts of the two crankshafts 44 are rotatably connected to the swing box 4, driving the swing box 4 to swing cyclically in a horizontal posture when the two crankshafts 44 rotate synchronously; one of the crankshafts 44 is connected to a swing motor 45, which is connected to one end of the two crankshafts 44 via a synchronous belt mechanism 46, driving the two crankshafts 44 to rotate synchronously. The synchronous belt mechanism 46 includes two synchronous pulleys and a synchronous belt; the two synchronous pulleys are connected to one end of the two crankshafts 44, and the synchronous belt wraps around the two synchronous pulleys to ensure that the two crankshafts 44 rotate synchronously.

[0023] Near the lower end of the roller 1, to prevent small particles from falling outside the swing box 4, a non-perforated area 16 without the sieve holes is provided on the lower end side of the roller 1. This ensures that when the swing box 4 swings, all small particles falling from the roller 1 fall into the upper sieve plate 41.

[0024] To prevent small particles from scattering randomly on both sides of the roller 1, upward-extending side baffles 47 are fixed to both sides of the swing box 4 to shield the left and right sides of the roller 1. The height of the side baffles 47 exceeds the highest point of the upper side of the mandrel 11, covering the lower semicircular arc of the roller 1, ensuring that all small particles from the roller 1 fall into the swing box 4.

[0025] Preferably, the spindle 11 is further connected to a plurality of swing arms 17; each swing arm 17 has an elastic flap 18 hinged at its end, and the end of the elastic flap 18 abuts against the inner wall of the drum 1. The elastic flap 18 is preferably made of rubber, and it swings as it rotates with the drum 1. The elastic flap 18 has two functions: first, it can continuously impact the screen drum, causing the screen drum to vibrate, which helps to reduce the probability of screen hole blockage and clears the already blocked screen holes through vibration; second, the continuously swinging elastic flap 18 can block the speed at which particles slide down, prolonging the time of the particle material in the drum 1 and improving the screening quality.

[0026] More preferably, the plurality of the swing arms 17 are arranged in a spiral around the spindle 11, and the spiral direction corresponds to the rotation direction of the roller 1, so as to slow down the movement of the granular material to the lower end of the roller 1 by means of the elastic flaps 18 when the roller 1 rotates.

[0027] For further optimization of the swing box 4, a plurality of elastic balls 48 are provided in the sealed space between the two sieve plates. When the elastic balls 48 swing together with the swing box 4, they bounce and continuously impact the two sieve plates, causing the two sieve plates to vibrate. This vibration clears the blocked sieve holes, allowing particles to pass through more smoothly. The exemplary elastic balls 48 are rubber balls, preferably hollow rubber balls, to improve elasticity.

[0028] The advantage of this embodiment is that the two-stage screening mechanism works together to have a large screening area, a large screening capacity in one go, can actively discharge large particles, reduce the occupation of the screen holes, the screen holes are not easy to clog, the screening quality is good, and the efficiency is high.

[0029] The parts of this utility model not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An abrasive particle screening device, comprising a rotatable drum (1) arranged at an inclined angle with open ends, characterized in that: The side wall of the roller (1) is densely covered with screen holes; the output pipe (21) connected to the lower end of the feed hopper (2) extends into the interior of the roller (1) from the opening on the high end side of the roller (1); a receiving hopper (3) is provided below the low end side of the roller (1); A swing box (4) is provided directly below the roller (1); the swing box (4) includes an upper screen plate (41) and a lower screen plate (42) arranged vertically and both having densely distributed screen holes, as well as side plates fixed to the periphery of the upper screen plate (41) and the lower screen plate (42); the upper screen plate (41) has a plurality of evenly spaced, upwardly protruding corrugated strips (411); the side of the corrugated strip (411) facing the receiving hopper (3) is an inclined surface (412), and the side facing the feeding hopper (2) is a vertical surface (413); the screen holes of the two screen plates are smaller than the screen holes of the roller (1); The swing box (4) is connected to a drive mechanism for driving the swing box (4) to swing back and forth in a horizontal posture; a belt conveyor (5) is provided below the swing box (4) for receiving the sieved granular material.

2. The abrasive particle screening device according to claim 1, characterized in that: The roller (1) has a spindle (11) at its center. Multiple support rods (12) are fixed to the side wall of the spindle (11). The end of each support rod (12) is fixed to the inner wall of the roller (1) to connect the spindle (11) and the roller (1) into a whole. Both ends of the spindle (11) extend out of the roller (1) and are connected to bearings (13). The bearings (13) are connected to the support frame (14) to rotatably suspend the roller (1) above the swing box (4). One end of the spindle (11) is connected to a rotary motor (15) to drive the spindle (11) to rotate.

3. The abrasive particle screening device according to claim 1, characterized in that: The drive mechanism includes two columns (43) on each of the left and right sides of the swing box (4); each column (43) has a bearing seat (431) at its top; the four columns (43) are divided into two groups, and the bearing seats (431) on the two columns (43) in each group are respectively fitted onto the two ends of a crankshaft (44); The central axis of the crankshaft (44) is eccentric relative to the axes at both ends; the central parts of both crankshafts (44) are rotatably connected to the swing box (4), which drives the swing box (4) to swing back and forth in a horizontal posture when the two crankshafts (44) rotate synchronously. One of the crankshafts (44) is connected to a swing motor (45), which is connected to one end of the two crankshafts (44) by a synchronous belt mechanism (46) to drive the two crankshafts (44) to rotate synchronously.

4. The abrasive particle screening device according to claim 1, characterized in that: The lower end of the roller (1) is provided with a non-porous area (16) without the sieve holes.

5. The abrasive particle screening device according to claim 1, characterized in that: The swing box (4) has upwardly extending side baffles (47) fixed to both sides.

6. The abrasive particle screening device according to claim 2, characterized in that: The spindle (11) is also connected to a plurality of swing arms (17); each swing arm (17) is hinged to an elastic flap (18) at its end, and the end of the elastic flap (18) abuts against the inner wall of the roller (1).

7. The abrasive particle screening device according to claim 1, characterized in that: Multiple elastic balls (48) are provided in the sealed space between the two sieve plates.

8. The abrasive particle screening device according to claim 7, characterized in that: The elastic ball (48) is a hollow rubber ball.

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