Limestone crushing and screening device

Abstract

The utility model discloses a kind of limestone crushing screening devices, its structure includes box, vibration screen is installed in the top of box inside corresponding place of hopper, two matching blocks are installed corresponding in the bottom left and right ends of vibration screen, the matching block of left side is sliding fit with vibration screen, the matching block of right side is fixedly connected with vibration screen, two matching blocks are connected with supporting mechanism and are hinged fit with supporting mechanism, the supporting mechanism of left end is fixedly connected with box left side, the installation position of the supporting mechanism of right end is adjustable in vertical direction, the vertical height of right end supporting mechanism is adjusted to change the right end height of vibration screen and further change the inclination angle of vibration screen, box left end is also profiled with side chamber, side chamber has feed inlet and discharge port between box, two crushing rollers are rotatably arranged in side chamber, side chamber is provided with first guide plate, and the other end of first guide plate extends into box through discharge port, conveying belt device is arranged through the bottom of box.

Description

Technical Field

[0001] This utility model relates to the technical field of limestone processing equipment, and more specifically, it relates to a limestone crushing and screening device. Background Technology

[0002] Limestone, primarily composed of calcium carbonate, is a crucial raw material widely used in construction, metallurgy, chemical industry, and other sectors. With the rapid development of these industries, higher demands are being placed on the particle size accuracy and production efficiency of limestone products. Efficient crushing and screening of limestone is a key step in ensuring it meets the production needs of various industries.

[0003] Current limestone crushing and screening devices typically consist of a shell, supporting frame, and connecting brackets. They use crushing hammers to initially crush the limestone, followed by screening using a vibrating screen. A dust removal system comprised of fans, suction pipes, and filters reduces dust emissions. However, in the screening process, the screen angle is usually fixed and cannot be adjusted. This fixed angle introduces several drawbacks. Different batches of limestone raw materials exhibit significant differences in particle size distribution, moisture content, and viscosity. A fixed-angle screen cannot flexibly adapt to these varying characteristics. For example, when processing small-sized limestone with high moisture content, the material tends to accumulate and clog the screen openings, significantly reducing screening efficiency and increasing the proportion of substandard particles in the product. Conversely, when processing larger-sized limestone, a fixed screen angle may cause the material to pass through the screen too quickly, resulting in insufficient screening. In addition, during the production process, the screening conditions need to be flexibly adjusted according to the different requirements of different downstream industries for limestone particle size. However, the fixed screen angle limits this flexibility, resulting in poor production adaptability and difficulty in meeting diverse market demands. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a limestone crushing and screening device to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a limestone crushing and screening device, comprising a box body, a hopper at the top of the box body communicating with the interior of the box body, a vibrating screen installed at the top of the box body corresponding to the hopper, two mating blocks installed at the bottom left and right ends of the vibrating screen, the left mating block slidingly engaging with the vibrating screen, and the right mating block fixedly connected to the vibrating screen, both mating blocks being connected to a support mechanism and hinged to the support mechanism, the left support mechanism being fixedly connected to the left side of the box body, the vertical installation position of the right support mechanism being adjustable, the right end height of the vibrating screen being changed by adjusting the vertical height of the right support mechanism, thereby changing the tilt angle of the vibrating screen, a side chamber being formed at the left end of the box body, an inlet and a outlet being provided between the side chamber and the box body, two crushing rollers being rotatably arranged in the side chamber, a first guide plate being provided in the side chamber, and the other end of the first guide plate extending through the outlet into the box body, and a conveyor belt device being installed through the bottom of the box body.

[0006] The present invention is further configured such that: the support mechanism includes a support base plate, a spring is fixedly mounted on the top of the support base plate, a U-shaped seat is fixedly connected to the upper end of the spring, the U-shaped seat is formed with an accommodating area adapted to the mating block, and the mating block is pivotally hinged within the accommodating area.

[0007] The present invention is further configured such that: the supporting base plate includes a vertical part and a horizontal part, the spring is fixedly mounted on the upper surface of the horizontal part, and the vertical part has two fastening holes correspondingly formed, and the fastener passes through the fastening holes to fix the position of the supporting base plate.

[0008] The present invention is further configured such that: two first threaded holes corresponding to the fastening holes are provided on the inner wall of the left side of the box body, and a positioning side plate is detachably provided on the inner wall of the right side of the box body, and the positioning side plate has a second threaded hole corresponding to each fastening hole in each pair of material outlets.

[0009] The present invention is further configured such that: a material distribution plate is provided inside the box above the conveyor belt device and below the first guide plate, and the material distribution plate is provided with a plurality of material distribution holes, the diameter of the material distribution holes being arranged in a gradient from right to left.

[0010] The present invention is further provided with a second guide plate located above the conveyor belt device and below the bulk material plate inside the box.

[0011] The present invention is further configured such that: a vacuum head is installed in both the housing and the side chamber, and each vacuum head is connected to the external vacuum unit.

[0012] In summary, this utility model has the following beneficial effects: 1. Flexible adjustment of screening angle: Through the adjustable support mechanism, the tilt angle of the vibrating screen can be easily changed, and the best screening effect can be achieved according to the characteristics of limestone such as particle size and moisture content and production requirements, thereby improving screening efficiency and quality.

[0013] 2. Optimize material transfer process: The crushing roller in the side chamber works closely with the screening components inside the box. The setting of the first guide plate, the dispersing plate and the second guide plate makes the transfer of materials between crushing, screening and other processes smoother, reduces material blockage and accumulation, and improves production efficiency.

[0014] 3. Effectively handles dust problems: The dust collection head connects to an external dust collection unit, which can promptly remove dust generated during the production process, reduce the dust concentration in the working environment, protect the health of operators, reduce dust corrosion on equipment, and extend the service life of equipment.

[0015] 4. Simple structure and easy maintenance: The overall structure is reasonably designed, the connection of each component is simple, the adjustment of the support mechanism is convenient, and the positioning side plate is detachable, which facilitates the installation, debugging and maintenance of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the support mechanism of this utility model.

[0019] Reference numerals: 1. Box body; 10. Hopper; 2. Vibrating screen; 20. Matching block; 21. Support mechanism; 22. Support base plate; 23. Spring component; 24. U-shaped seat; 25. Accommodation area; 26. Pivot; 27. Vertical part; 28. Horizontal part; 29. ​​Vibration source; 3. Side chamber; 30. Feed inlet; 31. Discharge outlet; 32. Crushing roller; 33. First guide plate; 4. Conveyor belt device; 5. Fastening hole; 50. First threaded hole; 51. Positioning side plate; 52. Second threaded hole; 6. Distributing plate; 60. Distributing hole; 61. Second guide plate; 7. Dust suction head. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-2 As shown in the figure, a limestone crushing and screening device according to an embodiment of the present invention includes a housing 1. The top of the housing 1 has a hopper 10 that communicates with the interior of the housing 1. A vibrating screen 2 is installed at the top of the housing 1 corresponding to the hopper 10. Two mating blocks 20 are installed at the left and right ends of the bottom of the vibrating screen 2. The left mating block 20 is in sliding engagement with the vibrating screen 2, and the right mating block 20 is fixedly connected to the vibrating screen 2. Both mating blocks 20 are connected to a support mechanism 21 and are hinged to the support mechanism 21. The support mechanism 21 at the left end is fixedly connected to the left side of the housing 1. The vertical installation position of the support mechanism 21 at the right end is adjustable. By adjusting the vertical height of the support mechanism 21 at the right end, the height of the right end of the vibrating screen 2 can be changed, thereby changing the tilt angle of the vibrating screen 2. A side chamber 3 is also formed at the left end of the box body 1. The side chamber 3 and the box body 1 have a feed inlet 30 and a discharge outlet 31. Two crushing rollers 32 are correspondingly and rotatably arranged in the side chamber 3. The side chamber 3 is provided with a first guide plate 33, and the other end of the first guide plate 33 extends through the discharge outlet 31 into the box body 1. A conveyor belt device 4 is provided through the bottom of the box body 1.

[0022] During use, the equipment is first installed and debugged. The support base plate 22 of the support mechanism 21 is installed on the left and right inner walls of the housing 1 using fasteners, ensuring that the support mechanism 21 at the left end is firmly fixed. The support mechanism 21 at the right end is adjusted to a suitable height as needed and fixed. The mating block 20 of the vibrating screen 2 is hinged to the receiving area 25 of the U-shaped seat 24 via the pivot 26, completing the installation of the vibrating screen 2. In the installed state, there is a certain safety distance between the vibrating screen 2 and the inner wall of the housing 1 to avoid collision between the vibrating screen 2 and the housing body when vibrating. The mating block 20 on the left side is in sliding fit with the vibrating screen 2, and the mating block 20 on the right side is fixed to the vibrating screen 2. The left end mating block 20 and the vibrating screen 2 have a sliding fit relationship that is the same as the fit principle of the slide rail and slider in the prior art. When the angle of the vibrating screen 2 is adjusted, the position of the vibrating screen 2 is adaptively changed through the sliding fit between the mating block 20 and the vibrating screen 2 to ensure smooth adjustment and avoid jamming. The crushing roller 32 is installed in the side chamber 3. The two crushing rollers 32 are driven and connected to the external drive device (which is the prior art) so that they can rotate normally. The first guide plate 33, the dispersing plate 6 and the second guide plate 61 are installed to ensure that the position of each guide plate is accurate and the connection is firm. The dust collection head 7 is installed in the box 1 and the side chamber 3 and connected to the external dust collection unit.

[0023] Limestone raw material is fed into housing 1 through hopper 10, and vibrating screen 2 starts working. Vibrating screen 2 is equipped with vibration source 29 (existing technology) to perform preliminary screening of limestone. According to the characteristics of limestone, the height of the right end support mechanism 21 is adjusted to change the inclination angle of vibrating screen 2 to achieve the best screening effect. Larger limestone particles that do not pass through vibrating screen 2 enter side chamber 3 through feed inlet 30. Vibrating screen 2 has an extension plate that extends through feed inlet 30 to above two crushing rollers 32. The extension plate is detachably connected to vibrating screen 2 by fasteners for easy daily maintenance and replacement. The extension plate guides the raw material to fall to the center of the two crushing rollers 32 and is crushed by the two crushing rollers 32. The crushed limestone enters housing 1 through first guide plate 33 and falls onto conveyor belt device 4, where it is output (existing technology).

[0024] The support mechanism 21 includes a support base plate 22, a spring member 23 is fixedly mounted on the top of the support base plate 22, a U-shaped seat 24 is fixedly connected to the upper end of the spring member 23, the U-shaped seat 24 is formed with a receiving area 25 that is adapted to the mating block 20, and the mating block 20 is hinged in the receiving area 25 through a pivot 26.

[0025] During use, the mating block 20 of the vibrating screen 2 is hinged to the accommodating area 25 of the U-shaped seat 24 via the pivot 26, which facilitates the daily maintenance and replacement of the vibrating screen 2; both ends of the vibrating screen 2 are hinged to the support mechanism 21 to ensure the smoothness of the angle adjustment of the vibrating screen 2.

[0026] The support base plate includes a vertical part 27 and a horizontal part 28. The spring member 23 is fixedly mounted on the upper surface of the horizontal part 28. The vertical part 27 has two fastening holes 5. The fastener passes through the fastening holes 5 to fix the position of the support base plate 22. The inner wall of the left side of the box body 1 has two first threaded holes 50 corresponding to the fastening holes 5. The inner wall of the right side of the box body 1 is detachably provided with a positioning side plate 51. The positioning side plate 51 has two second threaded holes 52 corresponding to each fastening hole 5.

[0027] In use, the horizontal part 28 of the support base plate is used to provide support, and the vertical part 27 is provided with fastening holes 5; when installing the support mechanism 21 on the left, the external fasteners (bolts or screws) are passed through the two fastening holes 5 and tightened with the first threaded hole 50; the support mechanism 21 on the right end is adjusted to a suitable height as needed, and then the external fasteners are passed through the two fastening holes 5 and tightened with the threaded holes of the corresponding height.

[0028] The positioning side plate 51 has two mounting ears formed on its upper and lower sides respectively. External fasteners pass through the two mounting ears and are fixedly connected to the inner side wall of the housing 1 to fix the positioning side plate 51. The positioning side plate 51 is detachably connected to the inner side wall of the housing 1 for easy daily maintenance and replacement.

[0029] Inside the housing 1, above the conveyor belt device 4 and below the first guide plate 33, there is a material distribution plate 6. The material distribution plate 6 has several material distribution holes 60 arranged in a gradient with the diameter of the holes being smaller on the right and larger on the left. Inside the housing 1, above the conveyor belt device 4 and below the material distribution plate 6, there is also a second guide plate 61.

[0030] In use, the loose material plate 6 is the preferred embodiment of this utility model. Users can choose whether to install the loose material plate 6 as needed. If the loose material plate 6 is installed, the second guide plate 61 needs to be installed in conjunction with it (the installation and fixing of the loose material plate 6 and the second guide plate 61 adopts the conventional fastener connection method of the prior art). When the bottom of the box 1 is a collection method such as a collection bucket, it is possible to choose not to install the loose material plate 6 and the second guide plate 61, that is, the raw material is directly guided by the first guide plate 33 to a single position for collection.

[0031] The bottom of the housing 1 of this utility model is set as a conveyor belt device 4. Therefore, it is preferable to set and install a material distribution plate 6 and a second guide plate 61. In this material distribution system, the raw material falls to the rightmost end of the material distribution plate 6 via the first guide plate 33. The material distribution holes 60 on the material distribution plate 6 are arranged in a gradient with smaller diameters on the right and larger diameters on the left. When the raw material contacts the material distribution plate 6, although the smaller holes 60 on the right have small individual diameters, the raw material initially falls here in a concentrated manner, and a large amount of raw material gathers in a unit time, resulting in a large throughput. As the raw material flows to the left, under the action of gravity and its own accumulation, the subsequent raw material begins to fall through the gradually larger holes 60 on the left. Although the holes 60 on the left have large diameters, the total amount of raw material is reduced due to the large amount of diversion at the right end. In addition, the distribution range is expanded, and the amount of raw material per unit area is reduced, so the throughput is actually smaller. In this way, the material distribution holes 60 with different diameters work together based on the difference in throughput to ensure that the raw material is evenly distributed on the belt of the conveyor belt device 4, effectively avoiding the accumulation of raw material.

[0032] The function of the second guide plate 61 is to address the situation where, when the amount of raw material is too large, the material supply may exceed the normal processing capacity of the material distribution plate 6 during the material conveying and dispersing process. When a large amount of raw material floods in, and the material distribution plate 6 is unable to evenly disperse the raw material through the material dispersing holes 60 within a predetermined time, there is a high risk of raw material accumulation and overflow. To address this issue, the second guide plate 61 is specially installed. It is installed in a key position and can receive the raw material that may overflow when the material distribution plate 6 cannot disperse the material sufficiently, change its flow direction, and guide it to a suitable area (conveyor belt device 4), thereby preventing the raw material from overflowing and scattering uncontrollably, thus ensuring the stability of the material handling process, reducing cleaning costs, and maintaining a clean and orderly production environment.

[0033] Avoiding raw material accumulation has the following benefits: it allows raw materials to be evenly distributed on the conveyor belt, continuously and stably entering subsequent processing stages, ensuring the continuity and efficiency of the entire production process; even material transport ensures balanced force on the conveyor belt equipment, reducing wear and deformation caused by excessive local pressure, extending equipment lifespan, and reducing equipment maintenance costs; even material distribution makes the production process easier to monitor and manage, allowing staff to more accurately grasp the amount of raw materials transported and the processing progress, and promptly identify and resolve problems that arise in production.

[0034] Both the housing 1 and the side chamber 3 are equipped with vacuum heads 7, and each vacuum head 7 is connected to the external vacuum unit.

[0035] During use, the vacuum head 7 continuously removes the generated dust throughout the entire working process, keeping the working environment clean;

[0036] This equipment requires regular inspection and maintenance, including but not limited to: ensuring that fasteners are not loose, regularly cleaning the dust suction head 7 and dust suction pipe to prevent dust blockage, regularly checking the wear of the crushing roller 32 and replacing the severely worn crushing roller 32 in a timely manner, checking the elasticity of the spring 23 and replacing it in a timely manner if necessary, and ensuring the buffering effect of the support mechanism 21.

[0037] It should be noted that the two crushing rollers used in this equipment are a mature, existing technology commonly found in various crushing equipment. They are typically made of high-strength, wear-resistant materials and consist of an active crushing roller and a driven crushing roller, arranged in parallel. The active crushing roller is connected to a power source and rotates at high speed under the drive of a motor. The driven crushing roller rotates synchronously in the opposite direction to the active crushing roller via gear or belt transmission. During operation, the material enters the gap between the two crushing rollers and is crushed under the compressive and shearing forces generated by the opposing rotation. The particle size can be controlled by adjusting the gap between the two rollers.

[0038] Installing a vibration source 29 on the vibrating screen 2 to provide vibration force is widely used in various industrial production processes. A common type of vibration source 29 is a vibrating motor, which contains an eccentric block. When the motor is powered on, the motor shaft drives the eccentric block to rotate at high speed. Because the center of gravity of the eccentric block does not coincide with the center of the motor shaft, centrifugal force is generated during rotation. This centrifugal force changes continuously in magnitude and direction, causing the motor to vibrate, which is then transmitted to the vibrating screen 2. Another type uses an eccentric shaft vibrator as the vibration source 29. The eccentric shaft rotates under the drive of the motor, and the centrifugal inertial force generated by the eccentric mass serves as the excitation force, driving the vibrating screen 2 to work. In some large-scale vibrating screen 2 applications, multiple sets of vibrating motors or vibrators are used in tandem to provide sufficient vibration force to meet the screening requirements of large-volume materials.

[0039] Belt conveyors are widely used material conveying equipment in industrial production. They mainly consist of a conveyor belt, drive rollers, idler rollers, idlers, a frame, and a drive unit. The conveyor belt wraps around the drive rollers and idler rollers. The drive unit drives the drive rollers to rotate, and the conveyor belt moves by friction. Materials are placed on the conveyor belt and are conveyed horizontally or at an incline as the belt moves. Idler rollers support the conveyor belt and materials, reduce running resistance, and ensure smooth operation of the conveyor belt. The conveying speed and conveying capacity can be adjusted according to actual production needs by adjusting the speed of the drive motor and the width and length of the conveyor belt.

[0040] In the overall structure of the equipment, the front ends of the housing 1 and the side chamber 3 are hinged with doors, a common existing technology structure. The doors are equipped with transparent windows, which, although not shown in the attached drawings, play a crucial role in practical applications. The transparent windows allow operators to directly observe the production situation inside the housing 1 at any time, promptly identifying problems such as material flow status and whether the equipment is operating abnormally. The doors also greatly facilitate the maintenance and replacement of internal parts in the housing 1. When repair or replacement of internal components is required, simply opening the door allows for operation, effectively improving the convenience and efficiency of equipment maintenance and ensuring continuous and stable operation of the equipment.

[0041] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0042] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A limestone crushing and screening device comprising a housing (1), characterized in that: The top of the box (1) has a hopper (10) that communicates with the inside of the box (1). A vibrating screen (2) is installed at the top of the box (1) at the position corresponding to the hopper (10). Two mating blocks (20) are installed at the bottom left and right ends of the vibrating screen (2). The mating block (20) on the left side is in sliding fit with the vibrating screen (2), and the mating block (20) on the right side is fixedly connected to the vibrating screen (2). Both mating blocks (20) are connected to a support mechanism (21) and are in hinge fit with the support mechanism (21). The support mechanism (21) at the left end is fixedly connected to the left side of the box (1), and the support mechanism (21) at the right end is vertically connected to the left side of the box (1). The installation position in the direction is adjustable. By adjusting the vertical height of the support mechanism (21) at the right end, the height of the right end of the vibrating screen (2) can be changed, thereby changing the tilt angle of the vibrating screen (2). The left end of the box (1) is also formed with a side chamber (3). The side chamber (3) and the box (1) have a feed inlet (30) and a discharge outlet (31). Two crushing rollers (32) are correspondingly and rotatably arranged in the side chamber (3). The side chamber (3) is provided with a first guide plate (33), and the other end of the first guide plate (33) extends through the discharge outlet (31) into the box (1). A conveyor belt device (4) is provided through the bottom of the box (1).

2. The limestone crushing and sizing device of claim 1, wherein: The support mechanism (21) includes a support base plate (22), a spring member (23) is fixedly mounted on the top of the support base plate (22), a U-shaped seat (24) is fixedly connected to the upper end of the spring member (23), the U-shaped seat (24) is formed with a receiving area (25) adapted to the mating block (20), and the mating block (20) is hinged in the receiving area (25) by a pivot (26).

3. The limestone crushing and sizing device of claim 2, wherein: The support base plate (22) includes a vertical part (27) and a horizontal part (28). A spring (23) is fixed on the upper surface of the horizontal part (28). The vertical part (27) has two fastening holes (5) formed accordingly. Fasteners pass through the fastening holes (5) to fix the position of the support base plate (22).

4. The limestone crushing and sizing device of claim 3, wherein: The inner wall of the left side of the box (1) has two first threaded holes (50) corresponding to the fastening holes (5). The inner wall of the right side of the box (1) is detachably provided with a positioning side plate (51). The positioning side plate (51) has two second threaded holes (52) corresponding to each fastening hole (5) in each pair of material outlets.

5. The limestone crushing and sizing device of claim 1, wherein: Inside the housing (1), above the conveyor belt device (4) and below the first guide plate (33), there is a material distribution plate (6). The material distribution plate (6) is provided with a plurality of material distribution holes (60), and the diameter of the material distribution holes (60) is arranged in a gradient from right to left.

6. The limestone crushing and sizing device of claim 5, wherein: A second guide plate (61) is also provided inside the box (1) above the conveyor belt device (4) and below the bulk material plate (6).

7. The limestone crushing and sizing device of claim 1, wherein: The housing (1) and the side chamber (3) are each equipped with a vacuum head (7), and each vacuum head (7) is connected to an external vacuum unit.

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