A limestone raw material pretreatment device

Abstract

The utility model relates to the field of limestone raw material pretreatment technology, especially to a limestone raw material pretreatment device, the limestone raw material pretreatment device includes: box, fixed sieve roller, three sliding sieve rollers, adjusting sliding block, threaded rod, first motor, electric push rod, adjusting sprocket, driving sprocket, driven sprocket, second motor, drive box, cleaning plate, fixed scraper, sliding scraper and spring assembly. Fixed sieve roller rotary connection is in the top of box, and sliding sieve roller is connected with threaded rod through adjusting sliding block, threaded rod thread groove pitch ratio is 1:2:3, and the position of adjusting sprocket is realized flexible adjustment of screening gap through cooperation electric push rod. The cleaning plate is driven by the third motor, and the sieve roller is cleaned through the fixed scraper and the sliding scraper with the third spring. The limestone raw material pretreatment device provided by the utility model has the advantages of wide application range, stable operation, high screening efficiency and good cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of limestone raw material pretreatment technology, and in particular to a limestone raw material pretreatment device. Background Technology

[0002] A limestone raw material pretreatment device is a specialized piece of equipment used for the preliminary processing of limestone raw materials. It is mainly used in the production processes of industries such as building materials, chemicals, and metallurgy. Its core function is to remove impurities from limestone raw materials through screening and cleaning, and to classify the limestone according to different particle sizes. This provides raw materials that meet quality requirements for subsequent deep processing steps such as crushing, grinding, and calcination, thereby improving subsequent production efficiency and ensuring product quality stability.

[0003] Existing limestone raw material pretreatment devices have many shortcomings in practical applications. First, the screening gap is mostly a fixed structure, which cannot flexibly adjust the screening gap according to different batches and different particle size requirements of limestone raw materials, resulting in a limited range of applications and difficulty in meeting diverse production needs. Second, limestone powder and fine particles easily adhere to the surface of the screening rollers. Existing cleaning mechanisms are mostly fixed scrapers, which cannot flexibly switch working states as needed. They remain in contact with the screening rollers during non-cleaning periods, which not only affects the screening effect but also aggravates component wear and reduces the service life of the equipment. At the same time, fixed scrapers are difficult to adapt to the special structure of the screening roller surface, resulting in unsatisfactory cleaning effects.

[0004] Therefore, it is necessary to provide a new limestone raw material pretreatment device to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a limestone raw material pretreatment device.

[0006] The limestone raw material pretreatment device provided by this utility model includes: a box body, a fixed screening roller rotatably connected to the top of the box body, and three sliding screening rollers equidistantly installed on the top of the box body; a first chute and a second chute are provided on both sides of the inner wall of the box body, with the first chute located above the second chute; three first baffles are slidably connected to each of the two first chutes, and three second baffles are slidably connected to each of the two second chutes; the two ends of the three sliding screening rollers are rotatably connected to the corresponding first baffles; three adjusting sliders are symmetrically slidably connected to both sides of the inner wall of the box body, and the two ends of the three sliding screening rollers are respectively connected to the top of the corresponding adjusting sliders. The fixed screening roller and the sliding screening roller are rotatably connected at the ends. The adjusting slider drives the sliding screening roller to slide, thereby adjusting the distance between the fixed screening roller and the sliding screening roller, as well as between each sliding screening roller. Four drive boxes are symmetrically installed at equal intervals inside the housing. Of the eight drive boxes, the two drive boxes located below the fixed screening roller are fixedly connected to the housing, and the top ends of the other six drive boxes are fixedly connected to the bottom ends of the corresponding adjusting sliders. Four cleaning plates are equidistantly installed inside the housing. Each cleaning plate has a drive box at each end, and the two ends of the four cleaning plates are rotatably connected to the corresponding drive boxes. The cleaning plates are used to clean the surfaces of the fixed screening roller and the sliding screening roller.

[0007] Preferably, the box body is symmetrically rotatably connected with a threaded rod, the surface of which has three threaded grooves, and the pitch ratio of the three threaded grooves from one end near the fixed screening roller to the other end is 1:2:3; the threaded rod is threadedly connected to the adjusting slider on the same side.

[0008] Preferably, a first motor is symmetrically installed inside the housing, and the output end of the first motor is fixedly connected to one end of the threaded rod.

[0009] Preferably, a drive sprocket is fixedly connected to one end of the fixed screening roller, and a driven sprocket is fixedly connected to one end of each sliding screening roller. An adjusting sprocket is installed inside the housing below the three driven sprockets. The drive sprocket, driven sprocket, and adjusting sprocket are connected by chain drive.

[0010] Preferably, a second motor is installed inside the housing, and the output end of the second motor is fixedly connected to the drive sprocket; an electric push rod is installed inside the housing, and the output end of the electric push rod is rotatably connected to the adjusting sprocket.

[0011] Preferably, both ends of the first baffle are slidably connected to a first slide plate, and a first spring is symmetrically installed between the first slide plate and the first baffle. One end of the first spring is fixedly connected to the first slide plate, and the other end of the first spring is fixedly connected to the first baffle. Both ends of the second baffle are slidably connected to a second slide plate, and a second spring is symmetrically installed between the second slide plate and the second baffle. One end of the second spring is fixedly connected to the second slide plate, and the other end of the second spring is fixedly connected to the second baffle.

[0012] Preferably, a fixed scraper is fixedly connected to the top of the cleaning plate, a sliding scraper is slidably connected to the top of the cleaning plate, and a third spring is symmetrically fixedly connected to the bottom of the sliding scraper, with the bottom end of the third spring fixedly connected to the inner wall of the cleaning plate.

[0013] Preferably, a third motor is fixedly connected inside the drive box, and the output end of the third motor is fixedly connected to one end of the cleaning plate.

[0014] Compared with related technologies, the limestone raw material pretreatment device provided by this utility model has the following beneficial effects: I. Improve equipment applicability and flexibility This invention utilizes an adjustment mechanism comprised of a threaded rod, an adjusting slider, a first motor, and an electric push rod to flexibly adjust the distance between the fixed and sliding screening rollers, as well as among the individual sliding screening rollers. The threaded rod's surface features grooves with varying pitch ratios, enabling synchronous and proportional adjustment of each sliding screening roller. Combined with the electric push rod's position control of the adjusting sprocket, this ensures the transmission chain remains consistently taut. This design solves the problems of fixed screening gaps and limited applicability in existing devices, allowing the equipment to quickly adjust screening parameters according to different batches and particle size requirements of limestone raw materials. This meets diverse production needs and significantly improves the equipment's versatility and operational flexibility.

[0015] II. Ensuring equipment operational stability and service life The device, through its first and second baffles and their associated sliding plate and spring structure, effectively blocks the first and second sliding grooves on the inner wall of the housing, preventing limestone particles from entering the housing and causing contamination or jamming of the transmission components and adjustment mechanism, thus ensuring the normal operation of all parts of the equipment. Simultaneously, the cleaning mechanism employs a controllable third motor drive design. When cleaning is required, it rotates the cleaning plate to bring the scraper into contact with the screening roller; when cleaning is not needed, it rotates to a separated state, avoiding unnecessary contact that could lead to component wear, extending the service life of the screening roller and scraper, and reducing equipment maintenance costs.

[0016] III. Enhancing screening effect and cleaning efficiency The triangular protrusions on the surfaces of the fixed and sliding screening rollers enhance the agitation and conveying capacity of the limestone raw materials, improving screening efficiency and grading accuracy. The coordinated design of the sliding scraper and the third spring in the cleaning mechanism allows the scraper to adapt to the triangular protrusions on the screening roller surface, ensuring close contact throughout the cleaning process. This effectively removes adhering limestone particles and prevents clogging of the screening roller surface from affecting the screening effect. This highly efficient cleaning capability ensures that the screening rollers maintain good working condition over a long period, further improving the quality stability of limestone pretreatment. Attached Figure Description

[0017] Figure 1 A schematic diagram of the limestone raw material pretreatment device provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the box structure. Figure 3 for Figure 2 The diagram shows the structure of the threaded rod. Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the baffle shown; Figure 5 for Figure 3 The diagram shows a cross-sectional view of the cleaning plate.

[0018] The following are the labels in the diagram: 1. Box body; 2. Fixed screening roller; 3. Sliding screening roller; 4. First chute; 5. Second chute; 6. First baffle; 7. Second baffle; 8. Adjusting slider; 9. Drive box; 10. Cleaning plate; 11. Threaded rod; 12. First motor; 13. Drive sprocket; 14. Driven sprocket; 15. Adjusting sprocket; 16. Second motor; 17. Electric push rod; 18. First slide plate; 19. First spring; 20. Second slide plate; 21. Second spring; 22. Fixed scraper; 23. Sliding scraper; 24. Third spring; 25. Third motor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 5A limestone raw material pretreatment device includes: a housing 1, a fixed screening roller 2 rotatably connected to the top of the housing 1, and three sliding screening rollers 3 equidistantly installed on the top of the housing 1; first grooves 4 and second grooves 5 are provided on both sides of the inner wall of the housing 1, with the first grooves 4 located above the second grooves 5; three first baffles 6 are slidably connected in each of the two first grooves 4, and three second baffles 7 are slidably connected in each of the two second grooves 5; the two ends of the three sliding screening rollers 3 are rotatably connected to the corresponding first baffles 6; three adjusting sliders 8 are symmetrically slidably connected on both sides of the inner wall of the housing 1, and the two ends of the three sliding screening rollers 3 are rotatably connected to the top of the corresponding adjusting sliders 8, the adjusting sliders 8 drive the sliding screening rollers 3 to slide, thereby adjusting the distance between the fixed screening roller 2 and the sliding screening rollers 3, as well as the distance between each sliding screening roller 3; four drive boxes 9 are symmetrically installed equidistantly inside the housing 1, and the eight drive boxes 9 contain... Two drive boxes 9 located below the fixed screening roller 2 are fixedly connected to the housing 1. The top ends of the other six drive boxes 9 are fixedly connected to the bottom ends of the corresponding adjusting sliders 8. Four cleaning plates 10 are equidistantly installed inside the housing 1. Each cleaning plate 10 has one drive box 9 at each end. The two ends of the four cleaning plates 10 are rotatably connected to the corresponding drive boxes 9. The cleaning plates 10 are used to clean the surfaces of the fixed screening roller 2 and the sliding screening roller 3. The two ends of the first baffle 6 are slidably connected to the first slide plate 18. The first slide plate 18 and the first baffle 6 are symmetrically installed with the first spring 19. One end of the first spring 19 is fixedly connected to the first slide plate 18, and the other end of the first spring 19 is fixedly connected to the first baffle 6. The two ends of the second baffle 7 are slidably connected to the second slide plate 20. The second slide plate 20 and the second baffle 7 are symmetrically installed with the second spring 21. One end of the second spring 21 is fixedly connected to the second slide plate 20, and the other end of the second spring 21 is fixedly connected to the second baffle 7.

[0022] It should be noted that the first baffle 6 and the second baffle 7 can block the first slide groove 4 and the second slide groove 5 to prevent solid particles from entering the interior of the housing 1 during operation and affecting the operation of other components.

[0023] Please see Figures 2 to 5Inside the housing 1, threaded rods 11 are symmetrically rotatably connected. The surface of the threaded rods 11 has three threaded grooves, with a pitch ratio of 1:2:3 from one end near the fixed screening roller 2 to the other. The threaded rods 11 are threadedly connected to the adjusting slider 8 on the same side. A first motor 12 is symmetrically installed inside the housing 1, and its output end is fixedly connected to one end of the threaded rod 11. A drive sprocket 13 is fixedly connected to one end of the fixed screening roller 2, and driven sprockets 14 are fixedly connected to one end of each sliding screening roller 3. An adjusting sprocket 15 is installed inside the housing 1, below the three driven sprockets 14 as a whole. The drive sprocket 13 and driven sprockets 14... The adjusting sprocket 15 is connected via chain drive; a second motor 16 is installed inside the housing 1, and the output end of the second motor 16 is fixedly connected to the drive sprocket 13; an electric push rod 17 is installed inside the housing 1, and the output end of the electric push rod 17 is rotatably connected to the adjusting sprocket 15; a fixed scraper 22 is fixedly connected to the top of the cleaning plate 10, a sliding scraper 23 is slidably connected to the top of the cleaning plate 10, and a third spring 24 is symmetrically fixedly connected to the bottom of the sliding scraper 23, with the bottom end of the third spring 24 fixedly connected to the inner wall of the cleaning plate 10; a third motor 25 is fixedly connected inside the drive box 9, and the output end of the third motor 25 is fixedly connected to one end of the cleaning plate 10.

[0024] It should be noted that when it is necessary to increase the distance between the fixed screening roller 2 and the sliding screening roller 3, as well as between each sliding screening roller 3, the electric push rod 17 pushes the adjusting sprocket 15 upward, and at the same time the first motor 12 drives the threaded rod 11 to rotate; conversely, the distance between the fixed screening roller 2 and the sliding screening roller 3, as well as between each sliding screening roller 3, is shortened.

[0025] The working principle of the limestone raw material pretreatment device provided by this utility model is as follows: I. Overall Structure and Protection Mechanism The device uses a housing 1 as its mounting base. A fixed screening roller 2 is rotatably connected to the top, and three sliding screening rollers 3 are arranged equidistantly below it. Both the fixed screening roller 2 and the sliding screening rollers 3 have equidistantly spaced triangular protrusions on their surfaces to enhance the screening effect. First and second sliding grooves 4 and 5 are symmetrically formed on both sides of the inner wall of the housing 1. Three first baffles 6 are slidably connected to each of the two first sliding grooves 4, and three second baffles 7 are slidably connected to each of the two second sliding grooves 5. First sliding plates 18 are slidably connected to both ends of the first baffles 6, and first springs 19 are symmetrically installed between the first sliding plates 18 and the first baffles 6, with both ends of the springs fixed to both. Second sliding plates 20 are slidably connected to both ends of the second baffles 7, and second springs 21 are symmetrically installed between the second sliding plates 20 and the second baffles 7, with both ends of the springs also fixed. Through the spring force, the first sliding plates 18 and the second sliding plates 20 are always in close contact with the inner wall of the groove, reliably blocking the groove and preventing solid particles from entering the housing 1 and affecting the operation of other components.

[0026] II. Screening Gap Adjustment Mechanism When it is necessary to adjust the distance between the fixed screening roller 2 and the sliding screening roller 3, as well as between each sliding screening roller 3, the adjustment is achieved by means of the threaded rod 11 symmetrically rotated inside the housing 1. The threaded rod 11 has three threaded grooves on its surface, and the pitch ratio from one end near the fixed screening roller 2 to the other end is 1:2:3. The threaded rod 11 is threadedly connected to the adjusting slider 8 on the same side. The output end of the first motor 12 symmetrically installed inside the housing 1 is fixedly connected to one end of the threaded rod 11. To increase the spacing, the first motor 12 drives the threaded rod 11 to rotate. Under the action of the threaded transmission, the adjusting slider 8 drives the sliding screening roller 3 to slide away from the fixed screening roller 2. At the same time, since one end of the fixed screening roller 2 is fixedly connected to the driving sprocket 13, and one end of each sliding screening roller 3 is fixedly connected to the driven sprocket 14, the adjusting sprocket 15 installed inside the housing 1 below the three driven sprockets 14 is connected to the driving sprocket 13 and the driven sprocket 14 through chain transmission. The output end of the electric push rod 17 installed inside the housing 1 is rotatably connected to the adjusting sprocket 15. At this time, the electric push rod 17 pushes the adjusting sprocket 15 upward to ensure chain tension. To shorten the spacing, the first motor 12 drives the threaded rod 11 to rotate in the opposite direction. The adjusting slider 8 drives the sliding screening roller 3 to slide closer to the fixed screening roller 2. At the same time, the electric push rod 17 retracts, driving the adjusting sprocket 15 downward to ensure chain tension and stable transmission.

[0027] III. Screening Operation Mechanism During the limestone raw material pretreatment screening operation, the second motor 16 installed inside the housing 1 starts, and its output end is fixedly connected to the drive sprocket 13. Through the transmission cooperation of the drive sprocket 13, chain, driven sprocket 14 and adjusting sprocket 15, the fixed screening roller 2 and three sliding screening rollers 3 are driven to rotate synchronously. The limestone raw material enters the housing 1 from the top of the device and falls on the rotating screening rollers. The triangular protrusions on the surface of the screening rollers are used to tumble and convey the raw material. At the same time, the gaps between the fixed screening roller 2 and the sliding screening rollers 3, as well as between each sliding screening roller 3, are used to classify and screen limestone of different particle sizes. Limestone particles that meet the corresponding gap size fall through the gap, completing the pretreatment screening.

[0028] IV. Cleaning and Maintenance Mechanism To ensure screening efficiency, four cleaning plates 10 are installed equidistantly inside the housing 1. Each cleaning plate 10 has a drive box 9 at each end. Two drive boxes 9 located below the fixed screening roller 2 are fixedly connected to the housing 1. The tops of the other six drive boxes 9 are fixed to the bottoms of the corresponding adjusting sliders 8. The two ends of the four cleaning plates 10 are rotatably connected to the corresponding drive boxes 9, and a third motor 25 is fixedly connected inside each drive box 9, with its output end fixed to one end of the cleaning plate 10. A fixed scraper 22 is fixedly connected to the top of the cleaning plate 10, and a sliding scraper 23 is also slidably connected to the top. A third spring 24 is symmetrically fixedly connected to the bottom of the sliding scraper 23, and the bottom end of the spring is fixed to the inner wall of the cleaning plate 10. When cleaning is required, the third motor 25 drives the cleaning plate 10 to rotate to the working position, bringing the fixed scraper 22 and the sliding scraper 23 into contact with the surfaces of the fixed screening roller 2 and the sliding screening roller 3. Under the elastic force of the third spring 24, the sliding scraper 23 adapts to the triangular protrusions on the surface of the screening roller, ensuring a tight fit. Through the rotation of the screening roller and the cooperation of the scrapers, the attached limestone particles are effectively removed. When cleaning is not required, the third motor 25 drives the cleaning plate 10 to rotate to the non-working position, separating the scrapers from the fixed screening roller 2 and the sliding screening roller 3. This avoids unnecessary contact in the non-cleaning state, reduces component wear, and ensures the normal operation of the screening process. This controllable cleaning method maintains the cleanliness of the screening rollers and extends the service life of the equipment.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A limestone raw material pretreatment device, characterized in that, include: The box (1) has a fixed screening roller (2) rotatably connected to its top, and three sliding screening rollers (3) are equidistantly installed on the top of the box (1). A first sliding groove (4) and a second sliding groove (5) are provided on both sides of the inner wall of the box (1), with the first sliding groove (4) located above the second sliding groove (5). Three first baffles (6) are slidably connected to each of the two first sliding grooves (4), and three second baffles (7) are slidably connected to each of the two second sliding grooves (5). The two ends of the three sliding screening rollers (3) are rotatably connected to the corresponding first baffles (6). The two inner walls of the box (1) are symmetrically arranged, and three adjusting sliders (8) are slidably connected to each of the two inner walls. The two ends of the three sliding screening rollers (3) are rotatably connected to the top of the corresponding adjusting sliders (8). Block (8) drives the sliding screening roller (3) to slide, thereby adjusting the distance between the fixed screening roller (2) and the sliding screening roller (3) and between each sliding screening roller (3); four drive boxes (9) are symmetrically installed at equal intervals inside the box (1). Among the eight drive boxes (9), the two drive boxes (9) located below the fixed screening roller (2) are fixedly connected to the box (1), and the top of the other six drive boxes (9) are fixedly connected to the bottom of the corresponding adjusting slider (8); four cleaning plates (10) are equidistantly installed inside the box (1). Each cleaning plate (10) has a drive box (9) at each end. The two ends of the four cleaning plates (10) are rotatably connected to the corresponding drive boxes (9). The cleaning plates (10) are used to clean the surfaces of the fixed screening roller (2) and the sliding screening roller (3).

2. The limestone raw material pretreatment device according to claim 1, characterized in that, The box (1) is symmetrically rotated inside and threaded rod (11). The surface of the threaded rod (11) has three threaded grooves. The pitch ratio of the three threaded grooves from one end near the fixed screening roller (2) to the other end is 1:2:

3. The threaded rod (11) is threadedly connected to the adjusting slider (8) on the same side.

3. The limestone raw material pretreatment device according to claim 2, characterized in that, The first motor (12) is symmetrically installed inside the housing (1), and the output end of the first motor (12) is fixedly connected to one end of the threaded rod (11).

4. The limestone raw material pretreatment device according to claim 1, characterized in that, One end of the fixed screening roller (2) is fixedly connected to the drive sprocket (13), and one end of the sliding screening roller (3) is fixedly connected to the driven sprocket (14). Inside the housing (1), below the three driven sprockets (14), an adjusting sprocket (15) is installed. The drive sprocket (13), driven sprocket (14), and adjusting sprocket (15) are connected by chain drive.

5. The limestone raw material pretreatment device according to claim 4, characterized in that, The housing (1) is equipped with a second motor (16), the output end of which is fixedly connected to the drive sprocket (13); the housing (1) is equipped with an electric push rod (17), the output end of which is rotatably connected to the adjusting sprocket (15).

6. The limestone raw material pretreatment device according to claim 1, characterized in that, Both ends of the first baffle (6) are slidably connected to the first slide plate (18). The first slide plate (18) and the first baffle (6) are symmetrically installed with the first spring (19). One end of the first spring (19) is fixedly connected to the first slide plate (18), and the other end of the first spring (19) is fixedly connected to the first baffle (6). Both ends of the second baffle (7) are slidably connected to the second slide plate (20). The second slide plate (20) and the second baffle (7) are symmetrically installed with the second spring (21). One end of the second spring (21) is fixedly connected to the second slide plate (20), and the other end of the second spring (21) is fixedly connected to the second baffle (7).

7. The limestone raw material pretreatment device according to claim 1, characterized in that, A fixed scraper (22) is fixedly connected to the top of the cleaning plate (10), and a sliding scraper (23) is slidably connected to the top of the cleaning plate (10). A third spring (24) is symmetrically fixedly connected to the bottom of the sliding scraper (23), and the bottom end of the third spring (24) is fixedly connected to the inner wall of the cleaning plate (10).

8. The limestone raw material pretreatment device according to claim 7, characterized in that, The drive box (9) is fixedly connected to a third motor (25), and the output end of the third motor (25) is fixedly connected to one end of the cleaning plate (10).

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