Multi-stage gravel screening device

Abstract

The utility model relates to the technical field of broken stone screening, discloses a multi-stage broken stone screening device, and aims to solve the problems that a vibration mechanism is relatively large in load and is accumulated and blocked due to broken stone. The multi-stage broken stone screening device is characterized in that a gap I is reserved between a first-stage conveying mechanism and a second-stage conveying mechanism; a second gap is reserved between the second-stage conveying mechanism and the third-stage conveying mechanism, the width of the second gap is larger than that of the first gap, small broken stones with the width smaller than that of the first gap preferentially fall into a first-stage material guiding piece from the first gap, and similarly, medium broken stones with the width smaller than that of the second gap preferentially fall into a second-stage material guiding piece from the second gap. And then the large gravel is output from the output end by the third-stage conveying mechanism, so that the gravel is conveyed and cannot be accumulated after falling to the input end of the first-stage conveying mechanism, a small amount of gravel is always kept at any position of the upper end of the conveying mechanism, and the dead weight of the gravel cannot cause overlarge load to the conveying mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of gravel screening, in particular to a multi-stage gravel screening device. Background Art

[0002] Gravel screening is a technological process of classifying gravel according to different particle sizes. Gravel screening usually uses equipment such as vibrating screens to complete. Through the action of vibration and sieve meshes, these devices separate gravel according to particle sizes. Common gravel screening specifications include 5-10mm, 10-20mm, 20-30mm, etc. Different engineering projects will select gravel with appropriate particle size specifications for use according to specific requirements.

[0003] The existing Chinese patent with the publication number of CN213223182U discloses a mountain stone grading and screening device, which includes a support seat, a screening box, and a vibration mechanism; the screening box is divided into multiple screening spaces by arranging multiple screening spaces inside, and multiple discharge covers are respectively communicated with the multiple screening spaces. By conveying gravel from the feed inlet of the screening box, the vibration mechanism vibrates to screen the gravel into various different specifications and discharges them from the discharge covers.

[0004] In view of the above related technologies, it is found that the gravel is conveyed by vibration. Since the gravel itself is heavy and irregular in shape, not only does it cause a large load on the vibration mechanism, but also the gravel is prone to accumulate and block, resulting in a reduction in the screening effect. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a multi-stage gravel screening device. By using this device for work, the problems that the gravel itself is heavy and irregular in shape, not only causing a large load on the vibration mechanism, but also the gravel is prone to accumulate and block, resulting in a reduction in the screening effect are solved.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A multi-stage gravel screening device includes a first-stage conveying mechanism, a second-stage conveying mechanism, and a third-stage conveying mechanism. The output end of the first-stage conveying mechanism is provided with the second-stage conveying mechanism, and the output end of the second-stage conveying mechanism is provided with the third-stage conveying mechanism. A gap one is reserved between the first-stage conveying mechanism and the second-stage conveying mechanism, and a gap two is reserved between the second-stage conveying mechanism and the third-stage conveying mechanism. The width of the gap two is greater than the width of the gap one. Baffles are installed at the upper ends of the first-stage conveying mechanism, the second-stage conveying mechanism, and the third-stage conveying mechanism. The output end of the first-stage conveying mechanism is located above the input end of the second-stage conveying mechanism, and the output end of the second-stage conveying mechanism is located above the input end of the third-stage conveying mechanism. A first-stage guiding member is arranged below the gap one, and a second-stage guiding member is arranged below the gap two.

[0007] Preferably, the baffle is designed in a U shape. The input end of the baffle close to the first-stage conveying mechanism is the total input end of the crushed stones, and the output end of the baffle close to the third-stage conveying mechanism is the total output end of the crushed stones.

[0008] Preferably, the first-stage conveying mechanism includes a support frame. A driving member is installed at one end of the support frame. A transmission belt is sleeved outside the driving end of the driving member. A rotating shaft is arranged inside the transmission belt at the end far from the driving member. The rotating shaft is movably connected to the inside of the end of the support frame far from the driving member. Multiple groups of pusher members are evenly arranged on the outside of the transmission belt.

[0009] Preferably, anti-jamming mechanisms are installed between the baffles at the upper ends of the first gap and the second gap. The anti-jamming mechanism includes a servo motor. The servo motor is fixedly installed on the outside of the baffle. The driving end of the servo motor penetrates through the baffle and is fixedly installed with a transmission shaft. A rotating pushing assembly is installed at the end of the transmission shaft far from the driving end of the servo motor. The end of the rotating pushing assembly far from the transmission shaft is movably connected to the baffle. The rotating pushing assembly includes a rotating disk. Two rotating disks are provided. Multiple groups of pushing columns are evenly arranged around between the two rotating disks. At least two pushing columns are provided.

[0010] Preferably, a medium-sized crushed stone pusher is further arranged between the two rotating disks. The medium-sized crushed stone pusher includes a pushing piece and movable blocks installed at both ends of the pushing piece. Sliding grooves are formed inside the rotating disks, and the movable blocks are slidably connected to the sliding grooves.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] A multi-stage crushed stone screening device proposed by the present utility model conveys crushed stones to the input end of the first-stage conveying mechanism. The first-stage conveying mechanism conveys the crushed stones to the input end of the second-stage conveying mechanism. When the crushed stones are input into the first gap, the small-sized crushed stones smaller than the width of the first gap preferentially fall from the first gap onto the first guiding member and are guided out by the first guiding member. Similarly, when the crushed stones are input into the second gap, the medium-sized crushed stones smaller than the width of the second gap preferentially fall from the second gap onto the second guiding member and are guided out by the second guiding member. Then the large-sized crushed stones are output from the output end by the third-stage conveying mechanism, thereby completing the screening of different specifications of crushed stones in a grading manner. Since the first-stage conveying mechanism, the second-stage conveying mechanism, and the third-stage conveying mechanism are all arranged in a long strip shape and are in a non-stop conveying state, the crushed stones are conveyed after falling to the input end of the first-stage conveying mechanism and will not accumulate. There is always a small amount of crushed stones at any position on the upper end of the conveying mechanism. The self-weight of the crushed stones will not cause too much load on the conveying mechanism. Therefore, the fact that the crushed stones are heavy and irregular in shape does not need to be considered, and it is not easy to cause the accumulation of crushed stones, improving the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is a schematic side view plane structure diagram of the whole of the present utility model;

[0015] Figure 3 is a schematic three-dimensional structure diagram of the anti-jamming mechanism of the present utility model;

[0016] Figure 4 is a schematic side view plane structure diagram of the rotation driving assembly of the present utility model;

[0017] Figure 5 is of the present utility model Figure 3 schematic enlarged structure diagram at position A;

[0018] Figure 6 is a schematic plane structure diagram of the state where large crushed stones of the present utility model are being pushed;

[0019] Figure 7 is a schematic plane structure diagram of the state where medium-sized crushed stones of the present utility model are being pushed.

[0020] In the figure: 1, primary conveying mechanism; 11, support frame; 12, driving member; 13, conveyor belt; 14, pusher; 2, secondary conveying mechanism; 3, tertiary conveying mechanism; 4, baffle; 5, anti-jamming mechanism; 51, servo motor; 52, transmission shaft; 53, rotation driving assembly; 531, rotating disk; 5311, chute; 532, pushing column; 533, medium-sized crushed stone pusher; 5331, pushing piece; 5332, movable block; 6, gap one; 7, gap two; 8, primary guiding member; 9, secondary guiding member. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0023] Combined with Figures 1 - 2, A multi-stage gravel screening device, including a first-stage conveying mechanism 1, a second-stage conveying mechanism 2, and a third-stage conveying mechanism 3. The output end of the first-stage conveying mechanism 1 is provided with the second-stage conveying mechanism 2, and the output end of the second-stage conveying mechanism 2 is provided with the third-stage conveying mechanism 3. The output end of the first-stage conveying mechanism 1 is located above the input end of the second-stage conveying mechanism 2, facilitating the small gravel to fall from the gap 6. A gap 6 is reserved between the first-stage conveying mechanism 1 and the second-stage conveying mechanism 2. A first-stage guiding member 8 is arranged below the gap 6. The output end of the second-stage conveying mechanism 2 is located above the input end of the third-stage conveying mechanism 3, facilitating the medium-sized gravel to fall from the gap 7. A gap 7 is reserved between the second-stage conveying mechanism 2 and the third-stage conveying mechanism 3. A second-stage guiding member 9 is arranged below the gap 7. The width of the gap 7 is greater than the width of the gap 6. A baffle 4 is installed at the upper ends of the first-stage conveying mechanism 1, the second-stage conveying mechanism 2, and the third-stage conveying mechanism 3. The baffle 4 is designed in a U shape. The input end of the baffle 4 close to the first-stage conveying mechanism 1 is the total input end of the gravel, and the output end of the baffle 4 close to the third-stage conveying mechanism 3 is the total output end of the gravel.

[0024] Combined with Figure Figure 2 , The structures of the first-stage conveying mechanism 1, the second-stage conveying mechanism 2, and the third-stage conveying mechanism 3 are the same. The first-stage conveying mechanism 1 includes a support frame 11. One end of the support frame 11 is installed with a driving member 12. The driving member 12 can be a motor. A transmission belt 13 is sleeved outside the driving end of the driving member 12. A rotating shaft is arranged inside the transmission belt 13 at the end far from the driving member 12. The rotating shaft is movably connected to the inner side of the end of the support frame 11 far from the driving member 12. A plurality of pushing members 14 are evenly arranged on the outside of the transmission belt 13.

[0025] Combined with Figures 3 - 4 and Figure 6 , Anti-jamming mechanisms 5 are installed between the baffles 4 at the upper ends of the gap 6 and the gap 7. The anti-jamming mechanism 5 includes a servo motor 51. The servo motor 51 is fixedly installed on the outside of the baffle 4. The driving end of the servo motor 51 penetrates through the baffle 4 and is fixedly installed with a transmission shaft 52. One end of the transmission shaft 52 far from the driving end of the servo motor 51 is installed with a rotating pushing assembly 53. One end of the rotating pushing assembly 53 far from the transmission shaft 52 is movably connected to the baffle 4. The rotating pushing assembly 53 includes a rotating disc 531. Two rotating discs 531 are provided. A plurality of pushing columns 532 are evenly arranged around between the two rotating discs 531. Preferably, three pushing columns 532 are provided.

[0026] When the servo motor 51 is started, it drives the transmission shaft 52 to drive the rotating disc 531 to rotate. When the large gravel is stuck in the gap 6 or the gap 7, at this time, when the pushing column 532 rotates and fits the large gravel, it will push the large gravel to move. Then, combined with the rotation of the transmission belt 13, the large gravel can cross the gap 6 or the gap 7 to avoid jamming and improve the stability of gravel screening.

[0027] Combined with Figures 3 - 5 and Figure 7 Figure 7 , a medium-sized gravel pusher 533 is also provided between the two rotating disks 531. The medium-sized gravel pusher 533 includes a pushing piece 5331 and movable blocks 5332 installed at both ends of the pushing piece 5331. A chute 5311 is provided on the inner side of the rotating disk 531, and the movable blocks 5332 are slidably connected to the movable blocks 5332. When medium and large-sized gravel is stuck in the gap 6, at this time, the pushing column 532 rotates to push the large-sized gravel away. As it rotates, the pushing piece 5331 causes the movable blocks 5332 to slide outwards along the chute 5311 under the action of gravity, so that the pushing piece 5331 extends out of the rotating disk 531. At this time, the pushing piece 5331 will contact the medium-sized gravel and push the medium-sized gravel to avoid jamming, further improving the stability of gravel screening and classification.

[0028] Working principle: The gravel falls onto one end of the conveyor belt 13, and the driving member 12 drives the conveyor belt 13 to rotate. With the cooperation of the pusher 14, the gravel is conveyed, and then the gravel is conveyed from the first-level conveying mechanism 1 to the input end of the second-level conveying mechanism 2. When the gravel is input into the gap 6, the small-sized gravel smaller than the width of the gap 6 preferentially falls from the gap 6 onto the first-level guiding member 8 and is guided out by the first-level guiding member 8. At the same time, the servo motor 51 is started to drive the transmission shaft 52 to drive the rotating disk 531 to rotate. When the large-sized gravel is stuck in the gap 6 or the gap 7, at this time, when the pushing column 532 rotates and fits against the large-sized gravel, it will push the large-sized gravel to move. Then, with the rotation of the conveyor belt 13, the large-sized gravel can cross the gap 6 or the gap 7. When the medium and large-sized gravel is stuck in the gap 6, at this time, the pushing column 532 rotates to push the large-sized gravel away. As it rotates, the pushing piece 5331 causes the movable blocks 5332 to slide outwards along the chute 5311 under the action of gravity, so that the pushing piece 5331 extends out of the rotating disk 531. At this time, the pushing piece 5331 will contact the medium-sized gravel and push the medium-sized gravel. Similarly, as the screening continues, when the gravel is input into the gap 7, the medium-sized gravel smaller than the width of the gap 7 preferentially falls from the gap 7 onto the second-level guiding member 9 and is guided out by the second-level guiding member 9. At the same time, the anti-jamming mechanism 5 prevents the gravel from jamming. Then, the large-sized gravel is output from the output end by the third-level conveying mechanism 3, thus completing the screening of different specifications of gravel in a hierarchical manner.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage gravel screening device, comprising a first-stage conveying mechanism (1), a second-stage conveying mechanism (2) and a third-stage conveying mechanism (3). The output end of the first-stage conveying mechanism (1) is provided with the second-stage conveying mechanism (2), and the output end of the second-stage conveying mechanism (2) is provided with the third-stage conveying mechanism (3), characterized in that: A gap one (6) is reserved between the first-level conveying mechanism (1) and the second-level conveying mechanism (2), and a gap two (7) is reserved between the second-level conveying mechanism (2) and the third-level conveying mechanism (3). The width of the gap two (7) is greater than the width of the gap one (6). A baffle (4) is installed at the upper ends of the first-level conveying mechanism (1), the second-level conveying mechanism (2), and the third-level conveying mechanism (3).

2. The multi-stage gravel screening device according to claim 1, wherein: The output end of the first-level conveying mechanism (1) is located above the input end of the second-level conveying mechanism (2), and the output end of the second-level conveying mechanism (2) is located above the input end of the third-level conveying mechanism (3).

3. A multi-stage gravel screening device according to claim 1, characterized in that: A first-level material guiding member (8) is arranged below the gap one (6), and a second-level material guiding member (9) is arranged below the gap two (7).

4. A multi-stage gravel screening device according to claim 1, characterized in that: The baffle (4) is designed in a U shape. The input end of the baffle (4) close to the first-level conveying mechanism (1) is the total input end of the crushed stones, and the output end of the baffle (4) close to the third-level conveying mechanism (3) is the total output end of the crushed stones.

5. A multi-stage gravel screening device according to claim 1, characterized in that: The first-level conveying mechanism (1) includes a support frame (11). A driving member (12) is installed at one end of the support frame (11). A transmission belt (13) is sleeved outside the driving end of the driving member (12). A rotating shaft is arranged inside the transmission belt (13) at the end far from the driving member (12). The rotating shaft is movably connected to the inside of the end of the support frame (11) far from the driving member (12). A plurality of groups of material pushing members (14) are evenly arranged on the outside of the transmission belt (13).

6. The multi-stage gravel screening device according to claim 1, characterized in that: An anti-jamming mechanism (5) is installed between the baffles (4) at the upper ends of the gap one (6) and the gap two (7).

7. The multi-stage gravel screening device according to claim 6, characterized in that: The anti-jamming mechanism (5) includes a servo motor (51). The servo motor (51) is fixedly installed on the outside of the baffle (4). The driving end of the servo motor (51) penetrates through the baffle (4) and is fixedly installed with a transmission shaft (52). A rotating and pushing assembly (53) is installed at the end of the transmission shaft (52) far from the driving end of the servo motor (51). The end of the rotating and pushing assembly (53) far from the transmission shaft (52) is movably connected to the baffle (4).

8. The multi-stage gravel screening device according to claim 7, characterized in that: The rotating and pushing assembly (53) includes a rotating disc (531). Two rotating discs (531) are provided. A plurality of groups of pushing columns (532) are evenly arranged around between the two rotating discs (531). At least two pushing columns (532) are provided.

9. The multi-stage gravel screening device according to claim 8, wherein: A medium-sized crushed stone pushing member (533) is also arranged between the two rotating discs (531). The medium-sized crushed stone pushing member (533) includes a pushing piece (5331) and movable blocks (5332) installed at both ends of the pushing piece (5331). A sliding groove (5311) is formed inside the rotating disc (531). The movable blocks (5332) are slidably connected to the sliding groove (5311).

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