Quickly-replaceable lime powder multi-stage screening device

Abstract

The utility model relates to a lime powder multistage screening device of quick screen replacement belongs to the field of limestone processing technology. Mainly include frame, screening box, screen, limiting mechanism, gland and locking mechanism, screening box is installed on the frame through spring inclination, inside is equipped with multiple sets of limiting mechanism and screen, and limiting mechanism includes carrier roller and limiting wheel for supporting and positioning screen, gland is hinged in the bottom of feed inlet and is fixed through locking mechanism, and locking mechanism adopts L shape positioning plate and compression spring to realize quick unlocking. The utility model through the cooperation of limiting mechanism and gland is used, and the mechanical locking function of locking mechanism is combined, realized the quick installation and disassembly of screen, significantly simplified the maintenance process, at the same time, effectively improved the work efficiency and screening quality of equipment, reduced the maintenance cost and time loss.

Description

Technical Field

[0001] This utility model belongs to the field of limestone processing technology, specifically relating to a multi-stage limestone powder screening device with quick screen replacement. Background Technology

[0002] In industrial production, multi-stage screening devices are widely used for the grading of granular materials such as lime powder. Their working efficiency and screening quality directly affect the smooth progress of subsequent processes. However, after long-term operation, existing multi-stage screening devices are prone to wear or clogging on the screen surface, which not only affects screening efficiency but may also lead to a decline in product quality.

[0003] Traditional screens are typically installed inside the screening machine frame using welding or bolting. While this method provides structural stability, it makes screen replacement or maintenance extremely cumbersome, time-consuming, and labor-intensive, severely impacting the overall efficiency of the equipment. Furthermore, the complex disassembly and assembly process often requires professional personnel, further increasing maintenance costs and time. Therefore, there is a need for a multi-stage screening device that allows for quick screen assembly and disassembly to simplify maintenance and improve work efficiency. Utility Model Content

[0004] To overcome the problems of cumbersome, time-consuming, and labor-intensive operation when replacing and maintaining screens in traditional multi-stage screening devices, this utility model provides a lime powder multi-stage screening device with quick screen replacement. By using a limiting mechanism and a pressure cap in combination with the mechanical locking function of a locking mechanism, the screen can be quickly installed and disassembled, significantly simplifying the maintenance process. At the same time, it effectively improves the working efficiency and screening quality of the equipment, and reduces maintenance costs and time consumption.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A multi-stage lime powder screening device with quick screen replacement mainly includes a frame, springs, screening box, screen, vibrating motor, partition, pressure cover, locking mechanism, and limiting mechanism. The screening box is installed at an inclination on the top of the frame by springs. The top of the screening box is provided with a feed inlet, and the bottom is provided with a discharge hopper communicating with its interior. Multiple sets of limiting mechanisms are installed at equal intervals along the height direction inside the screening box. Each set of limiting mechanisms is equipped with a layer of screen. The screen hole diameter of the screen decreases from top to bottom, dividing the interior of the screening box into multiple screening chambers. A pressure cover for fixing the screen is hinged at the bottom of the feed inlet. A locking mechanism for locking the bottom of the pressure cover is installed at the bottom of the screening box. The discharge end of the screening box is divided into multiple discharge channels corresponding to the screening chambers by partitions. A discharge trough is installed at the bottom of each discharge channel. Two limiting baffles are provided at the top of each partition. The vibrating motor is installed at the bottom of the screening box by bolts and is electrically connected to the controller on the frame.

[0006] The limiting mechanism includes a roller, a connecting shaft, and a limiting wheel. The end of the roller passes through the screening box and is fixedly connected to its side wall through a bearing. One end of the connecting shaft is installed on the inner wall of the screening box and above the roller, and the other end is equipped with a limiting wheel. The bottom surface of the screen contacts the roller, and the top edge of the screen rolls in contact with the limiting wheel. A guide plate is installed on the inner wall of the screening box. The guide plate is located directly below the screen, with one end extending horizontally to the side of the roller and the other end bending downward and parallel to the lower surface of the screen.

[0007] The locking mechanism includes an L-shaped positioning plate, a guide rod, a compression spring, a connecting plate, and a nut. A connecting plate is provided on the side wall of the screening box. The L-shaped positioning plate is horizontally installed at the bottom of the screening box. Guide rods are symmetrically arranged at its ends. The top of the guide rod passes through a through hole opened on the connecting plate and is threaded with a nut. The compression spring is sleeved on the guide rod, with its bottom end abutting against the connecting plate and its top end abutting against the nut.

[0008] An electromagnet electrically connected to the controller is installed at the bottom of the feed inlet, and a handle is provided on the outer wall of the pressure cover.

[0009] The beneficial effects of this utility model are: This invention, through the combined use of a limiting mechanism and a pressure cap, along with the mechanical locking function of a locking mechanism, enables the rapid installation and disassembly of the screen, significantly simplifying the maintenance process. At the same time, it effectively improves the working efficiency and screening quality of the equipment, while reducing maintenance costs and time consumption. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a three-dimensional schematic diagram of the cap of this utility model in the open state.

[0012] Figure 3 This is a three-dimensional cross-sectional view of the present invention.

[0013] Figure 4 This is a three-dimensional schematic diagram of the limiting mechanism and the screen in this utility model.

[0014] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0015] Figure 6 yes Figure 2 A magnified view of a section at point B.

[0016] The attached diagram is labeled as follows: 1. Frame; 2. Spring; 3. Screening box; 4. Screen; 5. Vibrating motor; 6. Partition plate; 7. Pressure cover; 8. Locking mechanism; 9. Feed inlet; 10. Discharge hopper; 11. Limiting mechanism; 12. Idler roller; 13. Connecting shaft; 14. Limiting wheel; 15. Discharge chute; 16. L-shaped positioning plate; 17. Guide rod; 18. Compression spring; 19. Connecting plate; 20. Nut; 21. Guide plate; 22. Electromagnet; 23. Handle; 24. Limiting baffle. Detailed Implementation

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0018] This utility model discloses a multi-stage lime powder screening device with quick screen replacement. The device mainly includes a frame 1, springs 2, a screening box 3, screens 4, a vibrating motor 5, partitions 6, a pressure cover 7, a locking mechanism 8, and limiting mechanisms 11. The screening box 3 has a parallelogram cross-section and is inclinedly mounted on the top of the frame 1 via springs 2. This inclined design utilizes gravity to promote material flow, thereby improving screening efficiency. The screening box 3 has a feed inlet 9 at the top and a discharge hopper 10 at the bottom, communicating with its interior, for receiving the material to be screened and the graded material after screening, respectively. Multiple sets of limiting mechanisms 11 are equidistantly installed along the height direction inside the screening box 3. Each set of limiting mechanisms has a layer of screens 4 installed on it. The diameter of the screen holes in the screens 4 decreases from top to bottom, thus dividing the interior of the screening box 3 into multiple screening chambers. Each screening chamber is used to screen materials within a specific particle size range. The discharge end of the screening box 3 is divided into multiple discharge channels by several vertically arranged partitions 6. Each discharge channel corresponds to a screening chamber, and a discharge trough 14 is installed at the bottom of each discharge channel to collect the material screened from the corresponding screening chamber. Two limiting baffles 24 are provided at the top of each partition 6 to limit the position of the end of the screen 4. The vibrating motor 5 is fixed to the bottom of the screening box 3 by bolts and electrically connected to the controller to drive the screening box 3 to generate high-frequency vibration, so that the material is evenly distributed on the screen 4 and the screening is completed, thereby improving the screening efficiency.

[0019] The limiting mechanism 11 includes a roller 12, a connecting shaft 13, and a limiting wheel 14. The end of the roller 12 passes through the screening box 3 and is fixedly connected to the side wall through a bearing, ensuring that it can rotate freely during use. One end of the connecting shaft 13 is fixed to the inner wall of the screening box 3 and located above the roller 12, and the other end is equipped with the limiting wheel 14, which can rotate freely. The screen 4 is placed on the roller 12, with its bottom surface in direct contact with the roller 12 and its top edge in rolling contact with the limiting wheel 14. The roller 12 is used to support the screen 4 and reduce friction when it moves, while the limiting wheel 14 is used to limit the vertical displacement of the screen 4, ensuring that the screen 4 can slide smoothly on the roller 11 during installation and disassembly, while avoiding jamming caused by the shaking of the screen 4.

[0020] In addition, a guide plate 21 is installed on the inner wall of the screening box 3. One end of the guide plate extends horizontally to the side of the idler roller 12, and the other end bends downward and is parallel to the lower surface of the screen 4. The function of the guide plate 21 is to guide the screen 4 to move smoothly onto the adjacent idler roller 12, preventing the screen 4 from shifting during replacement, thereby further improving the stability and reliability of the disassembly and assembly process. When the screen 4 needs to be installed, the operator only needs to slide one end of the screen 4 from the idler roller 11 on the feed port side of the screening box onto the guide plate 20, and then move it along the curved part of the guide plate 20 to the adjacent idler roller 11. When the end of the screen 4 contacts the limiting baffle 24, the sliding stops, thus completing the initial installation of the screen 4.

[0021] To enable quick assembly and disassembly of the screen 4, this invention employs a locking mechanism 8 and a pressure cap 7. The locking mechanism 8 includes an L-shaped positioning plate 16, a guide rod 17, a compression spring 18, a connecting plate 19, and a nut 20. The connecting plate 19 is located on the side wall of the screening box 3. The L-shaped positioning plate 16 is horizontally installed at the bottom of the screening box 3, with guide rods 17 symmetrically positioned at its ends. The top of the guide rod 17 passes through a through hole in the connecting plate 19 and is fixed by the nut 20. The compression spring 18 is sleeved on the guide rod 17, with its bottom end abutting against the connecting plate 19 and its top end abutting against the nut 20. When the screen 4 needs to be replaced, the operator simply presses the L-shaped positioning plate 16, causing the compression spring 18 to contract and release the locking of the pressure cap 7. At this time, the bottom end of the pressure cap 7 disengages from its limit position, and the operator can pull it open and flip it to a horizontal position using the handle 23. An electromagnet 22 is installed at the bottom of the feed inlet 9. The electromagnet 22 is electrically connected to the controller. When the pressure cover 7 is flipped to a horizontal position, the electromagnet 22 is energized to attract the pressure cover 7, fixing it in a horizontal position, which facilitates the operator's subsequent replacement of the screen 4. The locking mechanism 8 achieves quick locking and releasing of the pressure cover 7 through the elastic action of the compression spring 18, which significantly simplifies the disassembly and assembly process of the screen 4 and improves maintenance efficiency.

[0022] In practical applications, the working process of this screening device is as follows: First, the lime powder to be screened enters the screening box 3 through the feed inlet 9. Under the high-frequency vibration generated by the vibrating motor 5, the material is evenly distributed on the screen 4 and gradually completes multi-stage screening. As the diameter of the screen holes of the screen 4 decreases layer by layer, larger particles of material will remain on the upper screen 4, while smaller particles of material will pass through the screen holes and enter the next screening chamber. Finally, materials of different particle sizes are discharged into the corresponding discharge trough 15 through the discharge channels separated by the partition 6.

[0023] After prolonged use, if a layer of screen 4 becomes clogged or worn and needs replacement, the operator can manually press the L-shaped positioning plate 16, causing the compression spring 18 to contract under force. The guide rod 17 slides downward along the through hole on the connecting plate 19, thereby disengaging the end of the L-shaped positioning plate 16 from the limiting position of the cover 7 and releasing the locking mechanism 8 from locking the cover 7. At this time, the operator can pull open the cover 7 using the handle 22 and flip it to a horizontal position, where it is attracted and fixed by the energized electromagnet 22, facilitating subsequent operations. Next, the operator holds the end of the old screen 4 and pulls it to move on the roller 12, removing the old screen 4 from the roller 12. Then, one end of the new screen 4 is inserted into the gap between the roller 12 and the limiting wheel 14, ensuring that the top edge of the screen 4 rolls in contact with the limiting wheel 13 and the bottom surface is tightly fitted with the roller 11. Under the guidance of the guide plate 21, the new screen 4 is smoothly pushed into the designated position, and the end of the screen 4 is pressed against the limiting baffle. Finally, disconnect the power supply to the solenoid valve and flip the cover 7 back to its original position. As the bottom end of the cover 7 contacts the L-shaped positioning plate 16, the L-shaped positioning plate 16 gradually moves downward under the guidance of the guide rod 17, causing the compression spring 18 to contract. When the bottom end of the cover 7 rotates to the end of the L-shaped positioning plate 16, the L-shaped positioning plate 16 resets under the elastic force of the compression spring 18, locking the cover 7. At this time, the inner side of the cover 7 abuts against and fixes the end of the screen 4, thus completing the replacement of the screen 4. The above process achieves quick locking and releasing of the cover 7, further simplifying the operation steps. The entire replacement process does not require additional tools and is simple and quick to operate, significantly reducing maintenance costs and time consumption.

[0024] In summary, this invention, through the combined use of the limiting mechanism 11 and the pressure cap 7, along with the mechanical locking function of the locking mechanism 8 and the guiding action of the guide plate 21, achieves rapid installation and disassembly of the screen 4, significantly simplifying the maintenance process while ensuring the stability and reliability of the screen 4 during replacement. This device not only improves the working efficiency and screening quality of the equipment but also reduces downtime and labor costs caused by screen 4 maintenance.

[0025] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A multi-stage lime powder screening device with quick screen replacement, characterized in that: The machine includes a frame (1), springs (2), a screening box (3), a screen (4), a vibrating motor (5), a partition (6), a pressure cover (7), a locking mechanism (8), and a limiting mechanism (11). The screening box (3) is installed at an angle on the top of the frame (1) by the springs (2). The top of the screening box (3) is provided with a feed inlet (9), and the bottom is provided with a discharge hopper (10) communicating with its interior. Multiple sets of limiting mechanisms (11) are installed at equal intervals along the height direction inside the screening box (3). Each set of limiting mechanisms is equipped with a layer of screen (4). The diameter of the screen holes of the screen (4) decreases from top to bottom. The small size divides the inside of the screening box (3) into multiple screening chambers. The bottom of the feed inlet (9) is hinged with a pressure cover (7) for fixing the screen (4). The bottom of the screening box (3) is equipped with a locking mechanism (8) for locking the bottom of the pressure cover (7). The discharge end of the screening box (3) is divided into multiple discharge channels corresponding to the screening chambers by partitions (6). Each discharge channel is equipped with a discharge trough (15) at the bottom. Two limit baffles (24) are set at the top of each partition (6). The vibration motor (5) is installed at the bottom of the screening box (3) by bolts and is electrically connected to the controller on the frame.

2. The lime powder multi-stage screening device with quick screen replacement as described in claim 1, characterized in that: The limiting mechanism (11) includes a roller (12), a connecting shaft (13), and a limiting wheel (14). The end of the roller (12) passes through the screening box (3) and is fixedly connected to its side wall through a bearing. One end of the connecting shaft (13) is installed on the inner wall of the screening box (3) and is located above the roller (12). The other end is installed with the limiting wheel (14). The bottom surface of the screen (4) contacts the roller (12), and the top edge rolls in contact with the limiting wheel (14). A guide plate (21) is installed on the inner wall of the screening box (3). The guide plate (21) is located directly below the screen (4). One end of the guide plate extends horizontally to the side of the roller (12), and the other end bends downward and is parallel to the lower surface of the screen (4).

3. A multi-stage lime powder screening device with quick screen replacement as described in claim 1 or 2, characterized in that: The locking mechanism (8) includes an L-shaped positioning plate (16), a guide rod (17), a compression spring (18), and a nut (20). A connecting plate (19) is provided on the side wall of the screening box (3). The L-shaped positioning plate (16) is horizontally installed at the bottom of the screening box (3). The guide rod (17) is symmetrically provided at its end. The top of the guide rod (17) passes through the through hole opened on the connecting plate (19) and is threadedly connected to the nut (20). The compression spring (18) is sleeved on the guide rod (17). Its bottom end abuts against the connecting plate (19), and its top end abuts against the nut (20).

4. The lime powder multi-stage screening device with quick screen replacement as described in claim 3, characterized in that: The bottom of the feed inlet (9) is equipped with an electromagnet (22) that is electrically connected to the controller, and a handle (23) is provided on the outer wall of the cover (7).

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