Mining Machinery Vibrating Screen

Abstract

This utility model belongs to the field of mineral processing technology, specifically relating to a vibrating screen for mining machinery. It includes a base plate, a screen box on the upper side of the base plate, and base blocks fixed at the four corners of the lower side of the screen box. The base blocks are positioned on the upper side of the base plate. From top to bottom, a primary screen, a secondary screen, and a tertiary screen are fixedly arranged on the inner side of the screen box. Vibrators are installed in the middle of both sides of the screen box. Impact components are symmetrically arranged on the inner side of the base plate corresponding to the lower sides of the primary, secondary, and tertiary screens. By repeatedly impacting the screens with cleaning balls, the vibration frequency of the screens is disturbed, thereby shaking off clogged materials and preventing screen blockage, thus ensuring screening efficiency. Compared to existing methods where rubber cleaning balls vibrate at the same frequency as the vibrator impact the lower side of the screen, or manual washing, the impact of the cleaning balls on each level of the screen in this technical solution is more stable and effective, enabling continuous, efficient, and automatic cleaning of each level of the screen surface.

Description

Technical Field

[0001] This utility model belongs to the field of mineral processing technology, specifically relating to a vibrating screen for mining machinery. Background Technology

[0002] Mining vibrating screens typically use linear vibrating screens, which generally include a screen box, screen mesh, vibrator, support device, and spring damping system. The screen box is the main load-bearing structure, containing multiple layers of screen mesh, ranging from 1 to 4 layers depending on the requirements. The screen mesh can be made of woven metal mesh, perforated plate, or polyurethane screen plate. The vibrator is usually installed on the sides or top of the screen box, generating excitation force through the rotation of eccentric blocks, driving the screen box to produce linear vibration. The support device is used to fix the screen box and can be connected with anchor bolts or installed with a support frame. The spring system is used for vibration isolation and buffering, ensuring stable equipment operation.

[0003] In use, the equipment is usually installed below the conveyor belt or silo. The ore to be screened enters the screen surface from the feed inlet. As the screen body vibrates, the particles jump and roll on the screen. Particles of different sizes are classified through the screen. Particles smaller than the screen holes fall through the screen and are discharged from the bottom outlet, while particles larger than the screen holes move along the front of the screen and are discharged from the other side.

[0004] Currently, vibrating screens used in the mining industry are prone to screen clogging and low screening efficiency when processing large pieces of ore, wet materials, and sticky materials. Especially in continuous operation environments, due to high material moisture content or strong adhesion, material easily accumulates and clogs the screen mesh, causing the screen holes to become blocked and affecting the material classification accuracy. In addition, traditional self-cleaning structures often rely on rubber ball vibration or manual washing, which has limited effectiveness and cannot continuously and efficiently clean the screen surface automatically. In severe cases, it is necessary to stop the machine for cleaning, reducing work efficiency. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a vibrating screen for mining machinery, solving the problems of screen clogging and low screening efficiency that currently used vibrating screens in the mining field easily encounter when processing large pieces of ore, wet materials, and sticky materials. Especially in continuous operation environments, due to the high moisture content or strong adhesion of materials, material easily accumulates and clogs the screen mesh, causing the screen holes to become blocked and affecting the accuracy of material classification. In addition, traditional self-cleaning structures often rely on rubber ball vibration or manual washing, which has limited effectiveness and cannot continuously and efficiently clean the screen surface automatically. In severe cases, it is necessary to stop the machine for cleaning, reducing work efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vibrating screen for mining machinery, comprising a base plate, a screen box disposed on the upper side of the base plate, and base blocks fixedly disposed at the four corners of the lower side of the screen box, the base blocks being disposed on the upper side of the base plate. A primary screen, a secondary screen, and a tertiary screen are sequentially fixedly disposed on the inner side of the screen box from top to bottom. Vibrators are disposed in the middle of both sides of the screen box. Impact components are symmetrically disposed on the inner side of the base plate corresponding to the lower sides of the primary, secondary, and tertiary screens. Each impact component includes a cylinder, a rotating rod, a side plate, and a cleaning ball. The cylinder is fixedly connected to the base plate. Next, a rotating rod is provided at the center of the inner side of the cylinder. The rotating rod is rotatably connected to the base plate. A lever plate is symmetrically fixed on both sides of the rotating rod. A motor is fixedly provided on one side of the base plate corresponding to each rotating rod. The output end of the motor is fixedly connected to the rotating rod. An opening is provided in the middle of the upper side of the cylinder. Side plates are symmetrically fixed on the upper side of the cylinder. The upper side of the side plates is close to the lower side of the primary screen, secondary screen and tertiary screen respectively. Cleaning balls are evenly arranged between the side plates. The bottom of the cleaning balls extends to the inner side of the cylinder through the opening. When the lever plate rotates, it moves the bottom of the cleaning balls.

[0007] The beneficial effects of this utility model are as follows: by repeatedly impacting the screen with cleaning balls, the vibration frequency of the screen is disturbed, thereby shaking off the material blocking the screen through the impact vibration, avoiding screen blockage, and ensuring screening efficiency. Compared with the existing rubber cleaning balls that vibrate at the same frequency as the vibrator and impact the lower side of the screen, or compared with manual washing, the impact of the cleaning balls on each level of the screen in this technical solution is more stable and effective, and can continuously and efficiently clean the screen surfaces at each level automatically.

[0008] For use in separating and cleaning balls;

[0009] As a further improvement to the above technical solution: partitions are fixedly arranged at equal intervals between the side plates, and the cleaning balls are spaced apart between the partitions.

[0010] The beneficial effect of this improvement is that it can separate the cleaning balls so that they do not interfere with each other.

[0011] To adjust the tilt angle of the screen box;

[0012] As a further improvement to the above technical solution: hydraulic telescopic rods are fixedly installed at the four corners of the upper side of the base plate, corresponding to the base blocks. A rotating block is fixedly connected to the upper output end of the hydraulic telescopic rod, and the rotating block is located on the lower side of the base block.

[0013] The beneficial effect of this improvement is that pushing the rotating block upwards from the output end of the hydraulic telescopic rod can adjust the tilt angle of the screen box.

[0014] To reduce the transmission of vibration to the base plate;

[0015] As a further improvement to the above technical solution: a spring is fixedly provided between the rotating block and the bottom block.

[0016] The beneficial effect of this improvement is that the spring is used to reduce the transmission of vibration to the base plate.

[0017] For centralized feeding;

[0018] As a further improvement to the above technical solution: a bucket box is fixedly installed on one side of the upper side of the base plate.

[0019] The beneficial effects of this improvement are: the addition of a hopper for centralized material feeding.

[0020] For use in zoned material discharge;

[0021] As a further improvement to the above technical solution: A guide plate 1 and a guide plate 2 are fixedly installed on the inner side of the base plate away from the hopper box. The guide plate 1 is installed above the primary screen, and the guide plate 2 is installed above the secondary screen. The guide plates 1 and 2 are staggered and inclined. A discharge hopper 1 is connected to the side edge of the base plate corresponding to the edge of the guide plate 1 away from the hopper box, and a discharge hopper 2 is connected to the side edge of the base plate corresponding to the edge of the guide plate 2 away from the hopper box. The tertiary screen is unobstructed on the side away from the hopper box. A baffle is fixedly installed on the bottom inner side of the base plate away from the hopper box, and a discharge port is opened on the lower side of the base plate near the baffle.

[0022] The beneficial effect of this improvement is that it can be used for zoned material discharge.

[0023] To clean each level of the screen by spraying water through the mesh plate surface;

[0024] As a further improvement to the above technical solution: the side of the base plate away from the guide plate is a mesh plate surface.

[0025] The beneficial effects of this improvement are: it makes it easier to observe the working status of each level of screen on the inner side of the base plate through the plate surface, and it also makes it easier to directly spray water through the mesh plate surface to clean each level of screen in the later stage.

[0026] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0029] Figure 3 This is a side sectional view of the present invention;

[0030] Figure 4 In this utility model Figure 3 Enlarged view of point A.

[0031] In the diagram: 1. Base plate; 2. Base block; 3. Screen box; 4. Primary screen; 5. Secondary screen; 6. Tertiary screen; 7. Vibrator; 8. Hopper box; 9. Guide plate one; 10. Discharge hopper one; 11. Guide plate two; 12. Discharge hopper two; 13. Baffle; 14. Discharge port; 15. Motor; 16. Impact assembly; 161. Cylinder; 162. Rotating rod; 163. Side plate; 164. Cleaning ball; 165. Partition; 17. Hydraulic telescopic rod; 18. Rotating block; 19. Spring. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0033] like Figure 1 — Figure 4The vibrating screen for mining machinery includes a base plate 1. A screen box 3 is mounted on the upper side of the base plate 1. Base blocks 2 are fixedly mounted at the four corners of the lower side of the screen box 3, and the base blocks 2 are mounted on the upper side of the base plate 1. A primary screen 4, a secondary screen 5, and a tertiary screen 6 are fixedly mounted sequentially from top to bottom on the inner side of the screen box 3. A vibrator 7 is mounted in the middle of both sides of the screen box 3. Impact components 16 are symmetrically arranged on the inner side of the base plate 1, corresponding to the lower sides of the primary screen 4, secondary screen 5, and tertiary screen 6. The impact components 16 include a cylinder 161, a rotating rod 162, a side plate 163, and a cleaning ball 164. The cylinder 161 is fixedly connected to the base plate 1, and the rotating rod 162 is located at the center of the inner side of the cylinder 161. 2. The rotating rod 162 is rotatably connected to the base plate 1. A lever is symmetrically fixed on both sides of the rotating rod 162. A motor 15 is fixedly installed on one side of the base plate 1 corresponding to each rotating rod 162. The output ends of the motors 15 are fixedly connected to the rotating rods 162. An opening is provided in the middle of the upper side of the cylinder 161. Side plates 163 are symmetrically fixed on the upper side of the cylinder 161. The upper sides of the side plates 163 are close to the lower sides of the primary screen 4, secondary screen 5, and tertiary screen 6, respectively. Cleaning balls 164 are evenly arranged between the side plates 163. The bottom of the cleaning balls 164 extends through the opening to the inside of the cylinder 161. When the lever rotates, it actuates the bottom of the cleaning balls 164, repeatedly... The impact interferes with the vibration frequency of the screen, thereby shaking off the material clogging the screen and preventing clogging, thus ensuring screening efficiency. Compared to existing rubber cleaning balls that vibrate at the same frequency as the vibrator and impact the lower side of the screen, or compared to manual washing, the cleaning balls 164 in this technical solution provide a more stable and effective impact on each level of the screen, enabling continuous, efficient, and automatic cleaning of each level of the screen surface. Partitions 165 are fixedly and equidistantly arranged between the side plates 163, and the cleaning balls 164 are spaced apart between the partitions 165 to separate the cleaning balls 164 and prevent them from interfering with each other. Hydraulic telescopic rods 17 are fixedly arranged at the four corners of the upper side of the base plate 1, corresponding to the base blocks 2. A rotating block 18 is fixedly connected to the upper output end of the rod 17. The rotating block 18 is located on the lower side of the base block 2. Pushing the rotating block 18 upwards from the output end of the hydraulic telescopic rod 17 can adjust the tilt angle of the screen box 3. A spring 19 is fixedly installed between the rotating block 18 and the base block 2 to reduce the transmission of vibration to the base plate 1. A hopper box 8 is fixedly installed on one side of the upper surface of the base plate 1 for centralized feeding. A guide plate 1 9 and a guide plate 2 11 are fixedly installed on the inner side of the base plate 1 away from the hopper box 8. The guide plate 1 9 is located on the upper side of the primary screen 4, and the guide plate 2 11 is located on the upper side of the secondary screen 5. The guide plates 1 9 and 2 11 are staggered and inclined.A discharge hopper 10 is connected to the side edge of the base plate 1, corresponding to the side edge of the guide plate 1 9 away from the hopper box 8. A discharge hopper 2 12 is connected to the side edge of the base plate 1, corresponding to the side edge of the guide plate 2 11 away from the hopper box 8. The side of the three-stage screen 6 away from the hopper box 8 is unobstructed. A baffle 13 is fixedly installed on the bottom inner side of the base plate 1, away from the hopper box 8. A discharge port 14 is opened on the lower side of the base plate 1 near the baffle 13 for zoned discharge. The side of the base plate 1 away from the guide plate 9 is a mesh plate, which allows for easy observation of the working status of each stage of the screens inside the base plate 1 and facilitates direct water spraying through the mesh plate for cleaning each stage of the screens later.

[0034] Working principle and usage process of this utility model:

[0035] When using this device, the screen box 3 should be tilted downwards towards the guide plate 9. The ore is fed in from the top of the primary screen 4. Under the action of the vibrator 7, the primary screen 4, secondary screen 5, and tertiary screen 6 vibrate, screening the ore step by step to achieve grading. When processing large pieces of ore, wet materials, and sticky materials, screen blockage and low screening efficiency are common problems. The motor 15 can be started. The output of the motor 15 drives the rotating rod 162 to rotate, which in turn drives the agitator plate to rotate. The edge of the agitator plate is close to the inner wall of the cylinder 161. During rotation, the agitator plates on both sides will cyclically agitate the cleaning balls 1. 64. Under the rapid movement of the deflector, the instantaneous kinetic energy is converted into upward force, causing the cleaning ball 164 to impact the lower side of the corresponding screen. This impact, combined with repeated impacts, disrupts the vibration frequency of the screen, thereby shaking off the material clogging the screen and preventing clogging, thus ensuring screening efficiency. Compared to existing methods where rubber cleaning balls vibrate at the same frequency as the vibrator impact the lower side of the screen, or manual rinsing, the impact of the cleaning ball 164 on each level of screen in this technical solution is more stable and effective, enabling continuous, efficient, and automatic cleaning of each level of screen surface.

[0036] In addition, a partition 165 is provided to separate the cleaning balls 164, so that the cleaning balls 164 do not interfere with each other. In addition, the output end of the hydraulic telescopic rod 17 pushes the rotating block 18 to adjust the tilt angle of the screen box 3. In addition, a spring 19 is provided to reduce the transmission of vibration to the base plate 1. In addition, a hopper box 8 is provided for centralized feeding. In addition, the ore on the primary screen 4 is guided by the guide plate 19 and discharged from the discharge hopper 10. The ore on the secondary screen 5 is guided by the guide plate 21 and discharged from the baffle 13. The ore on the tertiary screen 6 is discharged directly. The ore on the bottom inner side of the base plate 1 is discharged from the discharge port 14 for zoned discharge. In addition, the side of the base plate 1 away from the guide plate 19 is a mesh plate. Through the plate, it is easy to observe the working status of each level of screen on the inner side of the base plate 1, and it is also easy to directly spray water through the mesh plate to clean each level of screen later.

[0037] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the invention; these examples are merely for the purpose of helping to understand the method and core ideas of the invention. The above descriptions are only preferred embodiments of the invention. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of the invention, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this invention.

Claims

1. A vibrating screen for mining machinery, characterized in that: The system includes a base plate (1), a sieve box (3) on the upper side of the base plate (1), and base blocks (2) fixedly installed at the four corners of the lower side of the sieve box (3). The base blocks (2) are installed on the upper side of the base plate (1). A primary sieve (4), a secondary sieve (5), and a tertiary sieve (6) are fixedly installed on the inner side of the sieve box (3) from top to bottom. A vibrator (7) is installed in the middle of both sides of the sieve box (3). An impact assembly (16) is symmetrically installed on the inner side of the base plate (1) corresponding to the lower side of the primary sieve (4), the secondary sieve (5), and the tertiary sieve (6). The impact assembly (16) includes a cylinder (161), a rotating rod (162), a side plate (163), and a cleaning ball (164). The cylinder (161) is fixedly connected to the base plate (1), and a rotating rod is installed at the center of the inner side of the cylinder (161). The rotating rod (162) is rotatably connected to the base plate (1). The rotating rod (162) is symmetrically fixed with a lever on both sides. The base plate (1) is fixedly equipped with a motor (15) on one side corresponding to the rotating rod (162). The output end of the motor (15) is fixedly connected to the rotating rod (162). The upper middle part of the cylinder (161) is provided with an opening. The upper side of the cylinder (161) is symmetrically fixed with a side plate (163). The upper side of the side plate (163) is close to the lower side of the first-stage screen (4), the second-stage screen (5) and the third-stage screen (6). Cleaning balls (164) are evenly arranged between the side plates (163). The bottom of the cleaning ball (164) goes through the opening to the inside of the cylinder (161). When the lever rotates, it moves the bottom of the cleaning ball (164).

2. The vibrating screen for mining machinery according to claim 1, characterized in that: The side plates (163) are fixedly arranged at equal intervals with partitions (165), and the cleaning balls (164) are arranged at intervals between the partitions (165).

3. The vibrating screen for mining machinery according to claim 1, characterized in that: Hydraulic telescopic rods (17) are fixedly installed at the four corners of the upper side of the base plate (1) corresponding to the base block (2). A rotating block (18) is fixedly connected to the upper output end of the hydraulic telescopic rod (17). The rotating block (18) is located on the lower side of the base block (2).

4. The vibrating screen for mining machinery according to claim 3, characterized in that: A spring (19) is fixedly installed between the rotating block (18) and the bottom block (2).

5. The vibrating screen for mining machinery according to claim 1, characterized in that: A bucket box (8) is fixedly installed on one side of the upper side of the base plate (1).

6. The vibrating screen for mining machinery according to claim 5, characterized in that: On the inner side of the base plate (1) away from the hopper (8), a guide plate 1 (9) and a guide plate 2 (11) are fixedly provided respectively. The guide plate 1 (9) is located on the upper side of the primary screen (4), and the guide plate 2 (11) is located on the upper side of the secondary screen (5). The guide plate 1 (9) and the guide plate 2 (11) are staggered and inclined. On the side of the base plate (1), a discharge hopper 1 (10) is connected to the edge of the guide plate 1 (9) away from the hopper (8). On the side of the base plate (1), a discharge hopper 2 (12) is connected to the edge of the guide plate 2 (11) away from the hopper (8). The tertiary screen (6) is unobstructed on the side away from the hopper (8). A baffle (13) is fixedly provided on the bottom inner side of the base plate (1) away from the hopper (8). A discharge port (14) is opened on the lower side of the base plate (1) near the baffle (13).

7. The vibrating screen for mining machinery according to claim 6, characterized in that: The side of the base plate (1) away from the guide plate (9) is a mesh plate surface.

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