A sand and gravel screening device
Patent Information
- Application Number
- CN202522427484.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-17
AI Technical Summary
现有的振动筛在工作时，其产生的强烈振动会直接传递至整个机架，不仅产生巨大的噪音，还容易导致设备结构疲劳损伤，缩短使用寿命，同时剧烈的晃动也影响了筛分的稳定性和精度；
通过设置支撑底板、固定立柱和最终分筛箱，在此过程中位于第二分筛滤板上方的等距打散挡杆能有效碰撞、打散下落的砂石团，防止其堵塞筛孔，确保了筛分的通畅性，第二、第三、第四分筛滤板的一侧均通过铰链轴转动连接有下料导向板，当需要收集某一规格的砂石时，有效吸收并耗散震动电机产生的大部分振动能量，同时位于震动电机上方的缓冲棒提供了一次震动吸收，共同降低了防尘罩传递给固定立柱的持续晃动，保障了设备稳定运行并延长了寿命，在储存箱内的收集盒底部，当砂石落入收集盒产生冲击时，第一弹簧和第一减震阻尼器配合使用能有效缓冲下压力，配合由海绵材质的缓冲压块与尼龙材质的缓冲框架进行二次缓冲，通过缓冲压块在缓冲框架限位槽内的压缩滑动，进一步吸收能量，完美保护了收集盒与储存箱的结构，通过加固斜板增强了固定立柱的稳定性，通过内部加固板强化了最终分筛箱的结构，收集盒通过两侧的限位滑块与储存箱内壁的限位导轨配合滑动，确保了其在缓冲过程中始终沿预定轨迹平稳运动，并能顺利复位，并通过可调向导向板和分类收集设计实现了砂石的精细化分级与管理，从而提升了筛分效率及操作便利性。
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Figure CN224865831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sand and gravel screening equipment, and in particular to a sand and gravel screening device. Background Technology
[0002] As an indispensable basic raw material in road and bridge construction projects, the rationality of the particle size distribution of sand and gravel directly affects the strength, workability, and durability of concrete. Therefore, before sand and gravel are put into use, they must be classified according to particle size using screening equipment.
[0003] In practical applications, existing sand and gravel screening devices mostly employ vibrating screen structures. A motor drives the screen to vibrate, causing the sand and gravel to jump across the screen surface, allowing particles smaller than the screen openings to pass through, thus achieving grading. However, these devices still have the following problems in practical applications: When existing vibrating screens are in operation, the strong vibrations they generate are directly transmitted to the entire frame, which not only produces huge noise, but also easily leads to fatigue damage to the equipment structure, shortening its service life. At the same time, the violent shaking also affects the stability and accuracy of screening. Most screening devices have limited grading levels and concentrated discharge ports, making it easy for sand and gravel of different sizes to mix during collection. Alternatively, multiple independent collection devices may be required, which takes up a lot of working space, increases operational complexity, and causes many inconveniences.
[0004] Therefore, this utility model provides a sand and gravel screening device. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies and provide a sand and gravel screening device that can effectively prevent screen clogging, has efficient buffering and shock absorption performance, and can achieve multi-stage fine screening and classification collection.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sand and gravel screening device, including a supporting base plate. Four fixed columns are fixedly connected to the top of the supporting base plate. A dust cover is installed between the four fixed columns. A primary screening chamber is fixedly connected inside the dust cover. A second screening filter plate is installed inside the primary screening chamber. Dispersion baffles are installed above the second screening filter plate at equal intervals. A third screening filter plate and a fourth screening filter plate are installed from top to bottom inside the dust cover and below the primary screening chamber. A vibration motor is installed on the outside of the dust cover. A final screening box is installed on the top of the supporting base plate and on one side of the dust cover. A top mounting frame with an inclined structure is fixedly connected to the top of the final screening box. A first screening filter plate is fixedly connected inside the top mounting frame. A storage box is fixedly connected to the top of the supporting base plate and on the side of the final screening box away from the dust cover. A collection box for use with the first screening filter plate is slidably connected inside the storage box. Equally spaced first springs are installed at the bottom of the collection box. A first shock absorber is fixedly connected inside each of the first springs. A top connecting plate is fixedly connected to the top of each of the first springs. The top of each top connecting plate is fixedly connected to the bottom of the collection box.
[0007] In a preferred embodiment, the second screening filter plate has equidistantly distributed first screening holes inside, the third screening filter plate has equidistantly distributed second screening holes inside, and the fourth screening filter plate has equidistantly distributed third screening holes inside. A material guide plate is rotatably connected to one side of each of the second, third, and fourth screening filter plates. The material guide plate rotates with the second, third, and fourth screening filter plates via a hinge shaft. Symmetrically distributed reinforcing inclined plates are installed between two fixed columns on the same side, reinforcing the fixed columns through these inclined plates. The final screening box has equidistantly distributed internal reinforcing plates fixedly connected inside. A bottom recovery box is installed at the bottom of the final screening box. The bottom recovery box has a pull-out structure for easy removal of the screened sand and gravel from the final screening box. The bottom of the bottom recovery box is slidably connected to the top of the supporting base plate.
[0008] In a preferred embodiment, a buffer frame is fixedly connected inside the storage box and below the collection box, and a buffer block is fixedly connected to the bottom of the collection box and above the buffer frame. The top of the buffer frame has a limiting groove that slides with the buffer block. The buffer block is made of sponge, and the buffer frame is made of nylon. When the collection box is subjected to force and moves downward, the buffer block will gradually slide into the buffer frame. The specially designed materials provide a secondary buffering and protection effect when the storage box collects sand and gravel. A control panel is fixedly connected to the outside of the storage box, and the vibration motor is electrically connected to the control panel.
[0009] In a preferred embodiment, a top support is fixedly connected to one end of each fixed column, and a second spring is fixedly connected to the top of each top support. A second damping device is fixedly connected inside each second spring, and a top fixing block is fixedly connected to one end of each second spring. One side of each top fixing block is fixedly connected to a dust cover, and a buffer rod is installed between two top fixing blocks on the same side and above the vibration motor.
[0010] In a preferred embodiment, the storage box has an internal cavity for mounting the collection box. The inner wall of the storage box and both sides of the collection box have limit guide rails. Limit sliders are slidably connected inside the limit guide rails. The sides of the two limit sliders that are close to each other are fixedly connected to the collection box.
[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: By setting up a supporting base plate, fixed columns, and a final screening box, the equidistant dispersing baffles located above the second screening filter plate effectively collide with and disperse falling sand and gravel clumps, preventing them from clogging the screen holes and ensuring smooth screening. One side of the second, third, and fourth screening filter plates is rotatably connected to a discharge guide plate via a hinge shaft. When collecting sand and gravel of a certain size, this effectively absorbs and dissipates most of the vibration energy generated by the vibrating motor. Simultaneously, the buffer bar located above the vibrating motor provides primary vibration absorption, collectively reducing the continuous shaking transmitted from the dust cover to the fixed columns, ensuring stable equipment operation and extending its lifespan. At the bottom of the collection box inside the storage tank, when sand and gravel fall into the collection box and impact, the first spring and... The first shock absorber, when used in conjunction with the buffer, effectively buffers the downward pressure. It works in conjunction with a buffer block made of sponge material and a buffer frame made of nylon material for secondary buffering. The buffer block's compression and sliding within the limiting groove of the buffer frame further absorbs energy, perfectly protecting the structure of the collection box and storage box. The stability of the fixed column is enhanced by a reinforcing inclined plate, and the structure of the final screening box is strengthened by an internal reinforcing plate. The collection box slides along the limiting sliders on both sides in conjunction with the limiting guide rails on the inner wall of the storage box, ensuring that it moves smoothly along a predetermined trajectory during the buffering process and can be easily reset. The adjustable guide plate and the classified collection design enable refined grading and management of sand and gravel, thereby improving screening efficiency and operational convenience. Attached Figure Description
[0012] Figure 1 A schematic diagram of the overall structure of a sand and gravel screening device provided by this utility model. Figure 1 ; Figure 2 A schematic diagram of the overall structure of a sand and gravel screening device provided by this utility model. Figure 2 ; Figure 3 An enlarged schematic diagram of the internal structure of the final screening box of a sand and gravel screening device provided by this utility model; Figure 4 An enlarged schematic diagram of the internal structure of the dust cover of a sand and gravel screening device provided by this utility model; Figure 5 An enlarged schematic diagram of the internal structure of the storage box of a sand and gravel screening device provided by this utility model; Figure 6 The present invention provides an accessory for a sand and gravel screening device. Figure 5 Enlarged schematic diagram of the structure at plate A.
[0013] Legend: 1. Support base plate; 11. Storage box; 12. Collection box; 13. Control panel; 14. Buffer block; 15. Buffer frame; 16. Limiting guide rail; 17. Limiting slider; 18. First spring; 19. First shock absorber; 191. Top connecting plate; 2. Fixed column; 21. Reinforcing inclined plate; 22. Top support base; 23. Second spring; 24. Second shock absorber; 25. Top fixing block; 26. Buffer rod; 3. Final screening box; 31. Bottom recycling box; 32. Internal reinforcing plate; 33. Top mounting frame; 34. First screening filter plate; 4. Dust cover; 41. Primary screening chamber; 42. Second screening filter plate; 43. Dispersing baffle; 44. Third screening filter plate; 45. Fourth screening filter plate; 46. Vibration motor; 47. Feed guide plate. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figures 1-6 As shown, this embodiment provides a technical solution: a sand and gravel screening device, including a supporting base plate 1, four fixed columns 2 are fixedly connected to the top of the supporting base plate 1, a dust cover 4 is installed between the four fixed columns 2, a primary screening chamber 41 is fixedly connected inside the dust cover 4, a second screening filter plate 42 is installed inside the primary screening chamber 41, and equidistantly distributed dispersing baffles 43 are installed above the second screening filter plate 42. A third screening filter plate 44 and a fourth screening filter plate 45 are installed from top to bottom inside the dust cover 4 and below the primary screening chamber 41. A vibration motor 46 is installed on the outside of the dust cover 4. In this scheme, a final screening box 3 is installed on the top of the supporting base plate 1 and on one side of the dust cover 4. A top mounting frame 33 with an inclined structure is fixedly connected to the top of the final screening box 3. A first screening filter plate 34 is fixedly connected inside the top mounting frame 33. A storage box 11 is fixedly connected to the top of the supporting base plate 1 and on the side of the final screening box 3 away from the dust cover 4. A collection box 12 for collection with the first screening filter plate 34 is slidably connected inside the storage box 11. A first spring 18 is installed at equal intervals at the bottom of the collection box 12. A first shock absorber 19 is fixedly connected inside each of the first springs 18. A top connecting plate 191 is fixedly connected to the top of each of the first springs 18. The top of the top connecting plate 191 is fixedly connected to the bottom of the collection box 12.
[0016] Going a step further, such as Figures 1-4 As shown: In this scheme, the second screening filter plate 42 has equidistantly distributed first screening holes inside, the third screening filter plate 44 has equidistantly distributed second screening holes inside, and the fourth screening filter plate 45 has equidistantly distributed third screening holes inside. The first screening holes have the largest openings, and the third screening holes have the smallest openings, thereby realizing multiple screening operations. The second screening filter plate 42, the third screening filter plate 44, and the fourth screening filter plate 45 are all rotatably connected to one side of a discharge guide plate 47. The discharge guide plate 47 is located above the first screening filter plate 34, thereby ensuring normal sand and gravel discharge. The discharge guide plate 47 rotates with the second screening filter plate 42, the third screening filter plate 44, and the fourth screening filter plate 45 through a hinge shaft, which facilitates manual operation of the discharge guide plate 47 to clear blockages in the discharge channels of the second screening filter plate 42, the third screening filter plate 44, and the fourth screening filter plate 45, and facilitates the collection and processing of sand and gravel of the corresponding specifications.
[0017] Going a step further, such as Figures 1-6 As shown: In this scheme, symmetrically distributed reinforcing inclined plates 21 are installed between the two fixed columns 2 on the same side. The fixed columns 2 are reinforced and connected by the reinforcing inclined plates 21. The internal reinforcing plates 32 are fixedly connected to the inside of the final screening box 3. The bottom of the final screening box 3 is equipped with a bottom recycling box 31. The bottom recycling box 31 is a pull-out structure, which facilitates the removal of the screened sand and gravel inside the final screening box 3. The bottom of the bottom recycling box 31 is slidably connected to the top of the supporting base plate 1.
[0018] In this design, a buffer frame 15 is fixedly connected inside the storage box 11 and below the collection box 12. A buffer block 14 is fixedly connected to the bottom of the collection box 12 and above the buffer frame 15. A limiting groove is provided on the top of the buffer frame 15 to accommodate the sliding of the buffer block 14. The buffer block 14 is made of sponge, and the buffer frame 15 is made of nylon. When the collection box 12 is subjected to force and moves downward, it will drive the buffer block 14 to gradually slide into the buffer frame 15. The specially designed materials provide a secondary buffering and protection effect when the storage box 11 collects sand and gravel.
[0019] Going a step further, such as Figures 1-4 As shown, in this scheme, a control panel 13 is fixedly connected to the outside of the storage box 11. The vibration motor 46 is electrically connected to the control panel 13. The control panel 13 is used to control the operation of the vibration motor 46, realizing unified management of electrical equipment. The overall structure does not use a large number of electrical equipment to assist in operation, saving the overall use and installation costs.
[0020] Going a step further, such as Figures 1-6 As shown, in this scheme, a top support 22 is fixedly connected to the top end of each fixed column 2. Equally spaced second springs 23 are fixedly connected to the top of each top support 22. A second damping device 24 is fixedly connected inside each second spring 23. A top fixing block 25 is fixedly connected to the top end of each second spring 23. One side of each top fixing block 25 is fixedly connected to the dust cover 4. A buffer rod 26 is installed between two top fixing blocks 25 on the same side and above the vibration motor 46. The buffer rod 26 absorbs primary vibration. The second springs 23 and the second damping device 24 work together to absorb the shaking of the dust cover 4, achieving a secondary buffering and protection effect. This reduces the continuous shaking of the dust cover 4 as a whole, providing protection for the equipment and ensuring normal subsequent sand and gravel screening operations.
[0021] In this design, the storage box 11 has an internal cavity for mounting the collection box 12. Limiting guide rails 16 are provided on the inner wall of the storage box 11 and on both sides of the collection box 12. Limiting sliders 17 are slidably connected inside the limiting guide rails 16. The side of the two limiting sliders 17 that are close to each other is fixedly connected to the collection box 12. By providing limiting guide rails 16 and limiting sliders 17 inside the storage box 11, the sliding trajectory of the collection box 12 is limited, thereby facilitating subsequent normal reset.
[0022] Working principle: like Figures 1-6 As shown: By setting up a supporting base plate 1, fixed columns 2, and a final screening box 3, and opening the control panel 13 during use, the control panel 13 is used to control the operation of the vibration motor 46, realizing unified management of electrical equipment. The overall structure does not use a large number of electrical equipment to assist in operation, saving overall usage and installation costs. The sand and gravel to be screened first enter the primary screening chamber 41 inside the dust cover 4, and fall onto the second screening filter plate 42 with the first screening hole with the largest aperture. During this process, the equidistant dispersing baffles 43 located above the second screening filter plate 42 can effectively collide and disperse the falling sand and gravel clumps, preventing them from clogging the screen holes and ensuring smooth screening. Driven by the vibration motor 46, the sand and gravel pass sequentially through the second screening filter plate 42, the first screening chamber with the medium aperture, and the second screening chamber 43. The third screening plate 44 with two sieve holes and the fourth screening plate 45 with the smallest sieve hole achieve multi-stage screening from coarse to fine. The largest sand and gravel particles are retained on the second screening plate, while the finest sand and gravel fall to the bottom. Each of the second, third, and fourth screening plates 45 is rotatably connected to a feed guide plate 47 via a hinge shaft. When collecting sand and gravel of a specific size, the corresponding feed guide plate 47 can be manually moved to tilt it in the direction of material flow, precisely guiding the sand and gravel of that size to the first screening plate 34 at the top of the final screening box 3. The first screening plate 34 performs final screening of sand and gravel from different grades. Sand and gravel that meet the requirements pass through the sieve holes and fall into the collection box 31 below. A small amount of oversized sand and gravel may remain. The particles are separated, and a pull-out bottom collection box 31 is provided at the bottom of the final screening box 3 to collect the residual material that slides off the first screening filter plate, achieving complete separation and collection of the material. A top shock absorption device consisting of a second spring 23 and a second shock absorber 24 is set between the fixed column 2 and the dust cover 4, which effectively absorbs and dissipates most of the vibration energy generated by the vibration motor 46. At the same time, the buffer bar located above the vibration motor 46 provides primary vibration absorption, which together reduces the continuous shaking transmitted from the dust cover to the fixed column, ensuring stable operation of the equipment and extending its service life. At the bottom of the collection box 12 in the storage box 11, when sand and gravel fall into the collection box 12 and cause impact, the first spring 18 and the first shock absorber 19 cooperate to... The system effectively buffers downward pressure, and utilizes a secondary buffer consisting of a sponge-material buffer block 14 and a nylon-material buffer frame 15. The buffer block 14, through compression and sliding within the limiting groove of the buffer frame 15, further absorbs energy, perfectly protecting the structure of the collection box 12 and storage box 11. The stability of the fixed column 2 is enhanced by the reinforcing inclined plate 21, and the structure of the final screening box 3 is strengthened by the internal reinforcing plate 32. The collection box 12 slides smoothly along a predetermined trajectory during the buffering process through the cooperation of the limiting sliders 17 on both sides and the limiting guide rails 16 on the inner wall of the storage box 11, ensuring smooth movement and successful resetting. The combination of the dispersing baffle 43 and multi-stage filter plates solves the clogging problem, and the dual shock absorption device suppresses harmful vibrations.The adjustable guide plate and classified collection design enable refined grading and management of sand and gravel, thereby improving screening efficiency and operational convenience.
[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A sand and gravel screening device, comprising a supporting base plate (1), characterized in that, Four fixed columns (2) are fixedly connected to the top of the supporting base plate (1). A dust cover (4) is installed between the four fixed columns (2). A primary screening chamber (41) is fixedly connected inside the dust cover (4). A second screening filter plate (42) is installed inside the primary screening chamber (41). Equally spaced dispersing baffles (43) are installed above the second screening filter plate (42). A third screening filter plate (44) and a fourth screening filter plate (45) are installed from top to bottom inside the dust cover (4) and below the primary screening chamber (41). A vibration motor (46) is installed on the outside of the dust cover (4). A final screening box (3) is installed on the top of the supporting base plate (1) and on one side of the dust cover (4). A top mounting frame (33) is fixedly connected to the top of the final screening box (3). A first screening filter plate (34) is fixedly connected inside the top mounting frame (33). A storage box (11) is fixedly connected to the top of the supporting base plate (1) and on the side of the final screening box (3) away from the dust cover (4). A collection box (12) is slidably connected inside the storage box (11) to collect the first screening filter plate (34). A first spring (18) and a first shock absorber (19) are installed at equal intervals at the bottom of the collection box (12). A top connecting plate (191) is fixedly connected to the top of each of the first springs (18). The top of each of the top connecting plates (191) is fixedly connected to the bottom of the collection box (12).
2. The sand and gravel screening device according to claim 1, characterized in that: The second screening filter plate (42) has equidistantly distributed first screening holes inside, the third screening filter plate (44) has equidistantly distributed second screening holes inside, and the fourth screening filter plate (45) has equidistantly distributed third screening holes inside. A feeding guide plate (47) is rotatably connected to one side of the second screening filter plate (42), the third screening filter plate (44), and the fourth screening filter plate (45). The feeding guide plate (47) is located above the first screening filter plate (34) to ensure normal sand and gravel feeding. The feeding guide plate (47) rotates with the second screening filter plate (42), the third screening filter plate (44), and the fourth screening filter plate (45) through a hinge shaft.
3. The sand and gravel screening device according to claim 1, characterized in that: Symmetrically distributed reinforcing inclined plates (21) are installed between the two fixed columns (2) on the same side. The interior of the final screening box (3) is fixedly connected with equidistantly distributed internal reinforcing plates (32). The bottom of the final screening box (3) is equipped with a bottom recycling box (31). The bottom recycling box (31) is a pull-out structure. The bottom of the bottom recycling box (31) is slidably connected to the top of the supporting base plate (1).
4. The sand and gravel screening device according to claim 3, characterized in that: A buffer frame (15) is fixedly connected inside the storage box (11) and below the collection box (12). A buffer block (14) is fixedly connected at the bottom of the collection box (12) and above the buffer frame (15). A limiting groove is provided on the top of the buffer frame (15) to cooperate with the sliding of the buffer block (14). The material of the buffer block (14) is a sponge block, and the material of the buffer frame (15) is nylon.
5. The sand and gravel screening device according to claim 4, characterized in that: The storage box (11) is fixedly connected to a control panel (13). The vibration motor (46) and the control panel (13) are electrically connected. The control panel (13) is used to control the operation of the vibration motor (46), thereby realizing the unified management of the power equipment.
6. The sand and gravel screening device according to claim 1, characterized in that: The top end of each fixed column (2) is fixedly connected to a top support seat (22), and the top of each top support seat (22) is fixedly connected to a second spring (23) distributed at equal intervals. The inside of each second spring (23) is fixedly connected to a second shock absorber (24). The top end of each second spring (23) is fixedly connected to a top fixing block (25). One side of each top fixing block (25) is fixedly connected to a dust cover (4). A buffer rod (26) is installed between two top fixing blocks (25) on the same side and above the vibration motor (46).
7. The sand and gravel screening device according to claim 6, characterized in that: The storage box (11) has an internal cavity for mounting the collection box (12). The inner wall of the storage box (11) and both sides of the collection box (12) are provided with limit guide rails (16). The inside of each limit guide rail (16) is slidably connected to a limit slider (17). The two limit sliders (17) are fixedly connected to the collection box (12) on the side that is close to each other.