Dry sand screening machine
By combining the rotational motion of the first and second screening discs with air pressure vibration, along with the scraper cleaning structure, the problems of accumulation and clogging during dry sand screening are solved, achieving efficient and precise dry sand particle size separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MACHENG YUANFENG MINERAL RESOURCES DEVELOPMENT CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-15
AI Technical Summary
In the screening process of traditional vibrating screens and drum screens, dry sand is prone to local accumulation and screen holes are easily blocked, resulting in incomplete screening and low efficiency.
The reciprocating rotation of the first and second screening discs, combined with air pressure vibration and scraper cleaning structure, expands the movement range of dry sand, prevents accumulation and clears blockages, and achieves two-stage screening.
It improves the comprehensiveness and speed of dry sand screening, ensures unobstructed screen holes, and can accurately separate dry sand of different particle sizes to meet various application needs.
Smart Images
Figure CN224237429U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of screening equipment, specifically a dry sand screening machine. Background Technology
[0002] Dry sand is a commonly used basic material in many industrial fields such as construction, casting, and chemical industry. Different application scenarios have different requirements for the particle size of dry sand. For example, in precision casting, dry sand with uniform and fine particle size is often required to ensure the accuracy and surface quality of castings. However, in some stages of construction, such as concrete mixing, the requirements for the particle size of dry sand are relatively more lenient. Therefore, efficient and accurate dry sand screening has become a key link to ensure that dry sand meets various application requirements.
[0003] Currently, the most common dry sand screening devices on the market include vibrating screens and drum screens. Vibrating screens use a motor to drive the screen body to generate high-frequency vibration, causing the dry sand to jump on the screen surface and pass through the screen holes to achieve screening. Drum screens use a motor to drive the drum to rotate, and the dry sand is screened as it rolls inside the drum.
[0004] However, during the screening process, dry sand tends to accumulate locally on the screen surface of traditional vibrating screens and drum screens, resulting in incomplete screening. Moreover, due to the lack of effective anti-clogging measures, the screen holes are easily blocked by dry sand particles, which greatly reduces the speed at which dry sand passes through the screen holes, making it difficult to improve the overall screening efficiency. Utility Model Content
[0005] To overcome the above-mentioned defects, this utility model provides a dry sand screening machine, which solves the problem that in the traditional vibrating screen and drum screen, dry sand is prone to local accumulation on the screen surface during the screening process, resulting in incomplete screening. Moreover, due to the lack of effective anti-clogging measures, the screen holes are easily blocked by dry sand particles, which greatly reduces the speed at which dry sand passes through the screen holes and makes it difficult to improve the overall screening efficiency.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a dry sand screening machine, comprising an outer barrel, with multiple sets of first connecting blocks fixedly installed on the outer side of the outer barrel, a base fixedly connected to the inner side of the first connecting blocks, a hopper rotatably connected inside the base, multiple sets of connecting rods fixedly installed on the top of the hopper, a second screening disc fixedly installed on the top of the connecting rods, a first screening disc positioned above the second screening disc, multiple sets of air storage tanks installed between the first and second screening discs, piston blocks movably installed in the air storage tanks with a symmetrical upper and lower structure, a movable rod fixedly connected to one end of the piston block, the movable rod being fixedly connected to the first and second screening discs respectively with an upper and lower opposing structure, and springs installed in the air storage tanks with a symmetrical upper and lower structure. Located outside the movable rod and fixed between the piston block and both ends of the air storage tank, the outer side of the air storage tank is connected to a connecting pipe, the inner side of the outer tank is slidably connected to an air guide ring, the outer side of the air guide ring is connected to an air inlet pipe, the air guide ring is connected to the connecting pipe, a first support block is fixedly connected to one side of the base, a first motor is fixedly installed on the top of the first support block, a drive gear is coaxially fixedly connected to the output end of the first motor, a gear ring is fixedly connected to the outer side of the collection hopper, the drive gear meshes with the gear ring, a first discharge pipe is installed on one side of the first screening disc, a second discharge pipe is installed on one side of the second screening disc, a third discharge pipe is connected to the bottom of the collection hopper, and the filter holes of the first screening disc are larger than those of the second screening disc.
[0007] As a further embodiment of this utility model: a second support block is fixedly connected to one side of the top of the outer barrel by bolts, a second motor is fixedly installed on the top of the second support block, and a transmission rod is coaxially fixedly connected to the output end of the second motor. The transmission rod movably passes through the first screening disc and the second screening disc. Two sets of scrapers are fixedly connected to the outside of the transmission rod. The scrapers are respectively located inside the first screening disc and the second screening disc. A brush is provided on the side of the scraper that contacts the first screening disc and the second screening disc.
[0008] As a further embodiment of this utility model: a protective shell for use with the drive gear is fixedly installed on the outer side of the outer barrel, and a support leg is fixedly installed on the first support block and the bottom of the base.
[0009] As a further embodiment of this utility model: a feed hopper is fixedly installed on the top of the outer barrel, a second slot is opened on the outer side of the outer barrel to cooperate with the air guide ring, and a first sliding groove is opened on the outer side of the outer barrel to cooperate with the toothed ring.
[0010] As a further embodiment of this utility model: multiple sets of movable grooves are provided on the outer side of the outer barrel to cooperate with the first discharge pipe and the second discharge pipe.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] The reciprocating rotation of the first and second screening discs expands the movement range of dry sand on the screen surface, allowing for more uniform distribution and preventing local accumulation, thus improving the comprehensiveness of screening. Simultaneously, the up-and-down vibration prevents screen hole clogging, allowing dry sand to pass through the screen more smoothly and accelerating the screening speed. The filter holes of the first screening disc are larger than those of the second screening disc, enabling two-stage screening of dry sand. This structure allows for more precise separation of dry sand of different particle sizes, meeting diverse application needs. The outer barrel is connected to the base via the first connecting block, providing stable support for the entire device. The collection hopper is rotatably connected to the base, and the transmission structure of the gear ring and drive gear ensures stable rotation. The combination of the air storage tank, piston block, movable rod, and spring cleverly utilizes air pressure to vibrate the screen discs, while the springs ensure structural stability and cushioning. The first and second screening discs and the collection hopper are respectively equipped with corresponding first, second, and third discharge pipes, facilitating the separate collection and discharge of dry sand of different particle sizes, improving the convenience of subsequent processing. Attached Figure Description
[0013] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;
[0015] Figure 3 This is a first-view schematic diagram of the cross-sectional structure of this utility model;
[0016] Figure 4 This is a second-view schematic diagram of the cross-sectional structure of this utility model;
[0017] Figure 5 For the present utility model Figure 3 Enlarged view of a portion of point A in the middle:
[0018] Figure 6 This is a schematic diagram of the main structure of this utility model.
[0019] In the diagram: 1. Outer barrel; 2. Support leg; 3. Connecting block; 4. Protective shell; 5. First motor; 6. First support block; 7. Air inlet pipe; 8. Feed hopper; 9. First chute; 10. Gear ring; 11. Second support block; 12. Second motor; 13. Transmission rod; 14. First screening disc; 15. Scraper; 16. Second slot; 17. First discharge pipe; 18. Second discharge pipe; 19. Base; 20. Third discharge pipe; 21. Drive gear; 22. Air guide ring; 23. Second screening disc; 24. Connecting rod; 25. Air storage tank; 26. Connecting pipe; 27. Piston block; 28. Movable rod; 29. Spring; 30. Collection hopper. Detailed Implementation
[0020] The technical solution of this patent will be further described in detail below with reference to specific embodiments.
[0021] like Figures 1-5 As shown, this utility model provides a technical solution for a dry sand screening machine:
[0022] The system includes an outer barrel 1. Multiple sets of first connecting blocks 3 are fixedly installed on the outer side of the outer barrel 1. A base 19 is fixedly connected to the inner side of each first connecting block 3. A collecting hopper 30 is rotatably connected inside the base 19. Multiple sets of connecting rods 24 are fixedly installed on the top of the collecting hopper 30. A second screening disc 23 is fixedly installed on the top of each connecting rod 24. A first screening disc 14 is positioned above the second screening disc 23. Multiple sets of air storage tanks 25 are installed between the first screening disc 14 and the second screening disc 23. A piston block 27 is movably installed in the air storage tank 25 in a symmetrical structure. A movable rod 28 is fixedly connected to one end of the piston block 27. The movable rod 28 is fixedly connected to the first screening disc 14 and the second screening disc 23 respectively in a vertically opposite structure. A spring 29 is installed in the air storage tank 25 in a symmetrical structure, and the spring 29 is located outside the movable rod 28 and fixed. Between the piston block 27 and the two ends of the air storage tank 25, a connecting pipe 26 is fixedly connected to the outside of the air storage tank 25, a guide ring 22 is slidably connected to the inside of the outer tank 1, an air inlet pipe 7 is fixedly connected to the outside of the guide ring 22, the guide ring 22 and the connecting pipe 26 are fixedly connected, a first support block 6 is fixedly connected to one side of the base 19, a first motor 5 is fixedly installed on the top of the first support block 6, a drive gear 21 is fixedly connected to the output end of the first motor 5, a gear ring 10 is fixedly connected to the outside of the collection hopper 30, the drive gear 21 and the gear ring 10 mesh, a first discharge pipe 17 is installed on one side of the first screening plate 14, a second discharge pipe 18 is installed on one side of the second screening plate 23, a third discharge pipe 20 is connected to the bottom of the collection hopper 30, and the filter holes of the first screening plate 14 are larger than the filter holes of the second screening plate 23;
[0023] Specifically, the first motor 5 is turned on and a threshold is set, causing the drive gear 21 to drive the gear ring 10 to rotate reciprocally at a deflection angle of 120°. The rotation of the gear ring 10 drives the collecting hopper 30 to rotate. The second screening disc 23, which is connected to the collecting hopper 30 via the connecting rod 24, and the first screening disc 14 located above it, are also connected. At this time, the dry sand to be screened is placed into the first screening disc 14. During its rotation, larger particles of dry sand remain on the first screening disc 14 and are discharged through the first discharge pipe 17. External gas enters the air guide ring 22 through the air inlet pipe 7, and then fills the air storage tank 25 through the connecting pipe 26. As the gas enters, the storage tank... When the air pressure inside the air tank 25 changes, the piston block 27 is squeezed to both ends by the air pressure. Since the piston block 27 is connected to the first screening plate 14 and the second screening plate 23 through the movable rod 28, the first screening plate 14 and the second screening plate 23 will vibrate up and down. During this process, the spring 29 on the outside of the air tank 25 plays a role in buffering and assisting in resetting. The dry sand that has been initially screened by the first screening plate 14 falls onto the second screening plate 23. Smaller particles of dry sand pass through the sieve holes of the second screening plate 23, while the particles remaining on the second screening plate 23 are discharged through the second discharge pipe 18. After two screenings, the remaining dry sand falls... The material enters the collection hopper 30 and is finally discharged through the third discharge pipe 20. The reciprocating rotation of the first screening disc 14 and the second screening disc 23 expands the movement range of the dry sand on the screen surface, allowing for more even distribution and preventing localized accumulation, thus improving the comprehensiveness of screening. Simultaneously, the up-and-down vibration prevents screen hole clogging, allowing the dry sand to pass through the screen more smoothly and accelerating the screening speed. The filter holes of the first screening disc 14 are larger than those of the second screening disc 23. This structure achieves two-stage screening of the dry sand, enabling more precise separation of dry sand of different particle sizes to meet various application requirements. The outer barrel 1 is connected to the base via the first connecting block 3. The 19 connection provides stable support for the entire equipment; the hopper 30 is rotatably connected to the base 19, and the transmission structure of the gear ring 10 and the drive gear 21 ensures stable rotation; the combination of the air storage tank 25, piston block 27, movable rod 28 and spring 29 cleverly utilizes air pressure to achieve vibration of the screen plate, and the spring 29 can ensure the stability and buffering effect of the structure. The first screening plate 14, the second screening plate 23 and the hopper 30 are respectively equipped with the first discharge pipe 17, the second discharge pipe 18 and the third discharge pipe 20, which facilitates the separate collection and discharge of dry sand of different particle sizes and improves the convenience of subsequent processing;
[0024] A second support block 11 is fixedly connected to one side of the top of the outer barrel 1 by bolts. A second motor 12 is fixedly installed on the top of the second support block 11. A transmission rod 13 is fixedly connected to the output end of the second motor 12 on the same axis. The transmission rod 13 moves through the first screening plate 14 and the second screening plate 23. Two sets of scrapers 15 are fixedly connected to the outside of the transmission rod 13. The scrapers 15 are located inside the first screening plate 14 and the second screening plate 23 respectively. A brush is provided on the side of the scraper 15 that contacts the first screening plate 14 and the second screening plate 23.
[0025] Specifically, the second motor 12 is fixed to the top of the outer barrel 1 by the second support block 11. When the second motor 12 is turned on, the transmission rod 13 at the output end of the second motor 12 begins to rotate. Since the transmission rod 13 moves through the first screening plate 14 and the second screening plate 23, and the two sets of scrapers 15 fixedly connected to the outside are located inside the first screening plate 14 and the second screening plate 23 respectively, the scrapers 15 will rotate together with the transmission rod 13. The brushes set on the contact surfaces of the scrapers 15 with the first screening plate 14 and the second screening plate 23 will clean the surface of the screening plates during the rotation. The sweeping action removes dry sand and particles clogging the screen holes from the screen plate, ensuring the normal screening function of the screen plate. The reciprocating rotation of the first screening plate 14 and the second screening plate 23 expands the movement range of the dry sand on the screen surface, allowing the dry sand to be distributed more evenly and avoiding local accumulation, thereby improving the comprehensiveness of screening. At the same time, the up-and-down vibration effect prevents the screen holes from clogging, allowing the dry sand to pass through the screen holes more smoothly and speeding up the screening speed. The scraper 15 and brush in the cleaning operation can clean the screen plate in time, further ensuring that the screen holes are unobstructed and maintaining efficient screening continuously.
[0026] A protective shell 4 for use with drive gear 21 is fixedly installed on the outside of the outer barrel 1. A support leg 2 is fixedly installed on the bottom of the first support block 6 and the base 19. A feed hopper 8 is fixedly installed on the top of the outer barrel 1. A second slot 16 for use with air guide ring 22 is opened on the outside of the outer barrel 1. A first sliding groove 9 for use with toothed ring 10 is opened on the outside of the outer barrel 1. Multiple sets of movable slots for use with first discharge pipe 17 and second discharge pipe 18 are opened on the outside of the outer barrel 1.
[0027] Specifically, the support leg 2 provides stable support for the equipment; the protective shell 4 protects the drive gear 21; the first sliding groove 9 ensures the stable rotation of the gear ring 10; the second slot 16 facilitates the sliding air guide ring 22 to guide air; the first screening plate 14, the second screening plate 23 and the collecting hopper 30 are respectively provided with the corresponding first discharge pipe 17, the second discharge pipe 18 and the third discharge pipe 20, and the outer barrel 1 is provided with a matching movable groove to facilitate the separate collection and discharge of dry sand of different particle sizes, thereby improving the convenience of subsequent processing.
[0028] The working principle of this utility model is as follows:
[0029] First, after the equipment is started, the first motor 5 is turned on and the threshold is set. The drive gear 21 at the output end of the first motor 5 drives the gear ring 10 meshing with it to rotate back and forth at a deflection angle of 120°. The rotation of the gear ring 10 causes the collection hopper 30 to rotate as well. The second screening plate 23 and the first screening plate 14 above it, which are connected to the collection hopper 30 through the connecting rod 24, also rotate back and forth synchronously. At the same time, the dry sand to be screened is put into the first screening plate 14 from the feed hopper 8.
[0030] Secondly, during the rotation of the first screening disc 14, external gas enters the air guide ring 22 through the air inlet pipe 7. The air guide ring 22 slides in the second slot 16 and fills the gas storage tank 25 through the connecting pipe 26. The gas pressure in the gas storage tank 25 changes, and the piston block 27 is squeezed to both ends by the gas pressure. Since the piston block 27 is connected to the first screening disc 14 and the second screening disc 23 through the movable rod 28, the first screening disc 14 and the second screening disc 23 will vibrate up and down. The spring 29 on the outside of the gas storage tank 25 plays a buffering and auxiliary reset role. During this process, the larger dry sand particles remain on the first screening disc 14 and are discharged through the first discharge pipe 17 and the movable groove on the outside of the outer barrel 1. The dry sand that has been preliminarily screened by the first screening disc 14 falls onto the second screening disc 23. The smaller dry sand particles pass through the screen holes of the second screening disc 23. The particles remaining on the second screening disc 23 are discharged through the second discharge pipe 18 and the movable groove on the outside of the outer barrel 1.
[0031] Next, the second motor 12 is turned on. The second motor 12 is fixed to the top of the outer barrel 1 by the second support block 11. The transmission rod 13 at its output end starts to rotate. The transmission rod 13 passes through the first screening plate 14 and the second screening plate 23, driving the scraper 15 fixed on its outer side to rotate. The brush on the scraper 15 cleans the surface of the first screening plate 14 and the second screening plate 23, removing the attached dry sand and particles that block the screen holes, ensuring the normal screening function of the screen plate.
[0032] It is worth mentioning that during the entire operation, the support leg 2 provides stable support for the equipment, the protective shell 4 protects the drive gear 21, and the first slide groove 9 ensures the stable rotation of the gear ring 10. These structures ensure the stable operation of each part of the equipment.
[0033] Finally, after two screenings, the remaining dry sand falls into the collection hopper 30 and is eventually discharged through the third discharge pipe 20. The entire equipment achieves efficient and precise screening of dry sand through a series of actions such as rotation, vibration, and screen cleaning.
[0034] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.
Claims
1. A dry sand screening machine, comprising an outer barrel (1), characterized in that: Multiple sets of first connecting blocks (3) are fixedly installed on the outer side of the outer barrel (1). A base (19) is fixedly connected to the inner side of the first connecting block (3). A hopper (30) is rotatably connected inside the base (19). Multiple sets of connecting rods (24) are fixedly installed on the top of the hopper (30). A second screening disc (23) is fixedly installed on the top of the connecting rods (24). A first screening disc (14) is set above the second screening disc (23). Between the first screening disc (14) and the second screening disc (23) Multiple gas storage tanks (25) are installed. A piston block (27) is movably installed inside each gas storage tank (25) using a symmetrical upper and lower structure. One end of each piston block (27) is fixedly connected to a movable rod (28). The movable rod (28) is fixedly connected to the first sieve disc (14) and the second sieve disc (23) respectively using an upper and lower opposing structure. A spring (29) is installed in each gas storage tank (25) using a symmetrical upper and lower structure. The spring (29) is located outside the movable rod (28) and fixed to the piston block. 27) Between the two ends of the gas storage tank (25), a connecting pipe (26) is fixedly connected to the outer side of the gas storage tank (25), a guide ring (22) is slidably connected to the inner side of the outer tank (1), an air inlet pipe (7) is fixedly connected to the outer side of the guide ring (22), the guide ring (22) is fixedly connected to the connecting pipe (26), a first support block (6) is fixedly connected to one side of the base (19), a first motor (5) is fixedly installed on the top of the first support block (6), the first motor (5) A drive gear (21) is coaxially fixedly connected to the output end. A toothed ring (10) is fixedly connected to the outside of the hopper (30). The drive gear (21) meshes with the toothed ring (10). A first discharge pipe (17) is installed on one side of the first sieve disc (14). A second discharge pipe (18) is installed on one side of the second sieve disc (23). A third discharge pipe (20) is connected to the bottom of the hopper (30). The filter holes of the first sieve disc (14) are larger than the filter holes of the second sieve disc (23).
2. The dry sand screening machine according to claim 1, characterized in that: The top side of the outer barrel (1) is fixedly connected to a second support block (11) by bolts. A second motor (12) is fixedly installed on the top of the second support block (11). A transmission rod (13) is coaxially fixedly connected to the output end of the second motor (12). The transmission rod (13) moves through the first sieve disc (14) and the second sieve disc (23). Two sets of scrapers (15) are fixedly connected to the outside of the transmission rod (13). The scrapers (15) are located inside the first sieve disc (14) and the second sieve disc (23) respectively. A brush is provided on the side of the scraper (15) that contacts the first sieve disc (14) and the second sieve disc (23).
3. A dry sand screening machine according to claim 2, characterized in that: The outer barrel (1) is fixedly installed with a protective shell (4) for use with the drive gear (21), and the first support block (6) and the bottom of the base (19) are fixedly installed with support legs (2).
4. A dry sand screening machine according to claim 3, characterized in that: The outer barrel (1) is fixedly installed with a feed hopper (8), and the outer barrel (1) has a second slot (16) for use with the air guide ring (22) on the outside. The outer barrel (1) also has a first sliding groove (9) for use with the toothed ring (10) on the outside.
5. A dry sand screening machine according to claim 4, characterized in that: The outer barrel (1) has multiple sets of movable slots on its outer side that work in conjunction with the first discharge pipe (17) and the second discharge pipe (18).