A coal screening device

Abstract

This utility model discloses a coal screening device, including a box body. Two symmetrically distributed support columns are fixedly connected to the bottom of the box body, and a door is hinged to the front of the box body. This utility model belongs to the field of coal screening technology, specifically addressing the problems of incomplete screening by fixed screens relying on the weight of coal, uneven vibration amplitude of screen plates in some vibrating screens using a single vibration source, and high labor intensity due to manual feeding in traditional devices.

Description

Technical Field

[0001] This utility model belongs to the field of coal screening technology, and in particular relates to a coal screening device. Background Technology

[0002] Screening is a crucial pretreatment step in coal production and processing, directly affecting the graded utilization and combustion efficiency of coal.

[0003] Traditional coal screening devices typically use fixed screens or simple vibrating screens, but they have the following technical problems: fixed screens rely on the coal's own weight to fall and screen, which can easily cause blockages and result in incomplete screening; some vibrating screens use a single vibration source, resulting in uneven screen plate amplitude; traditional devices rely on manual feeding, which is labor-intensive and difficult to achieve continuous operation, thus limiting production efficiency. Summary of the Invention

[0004] The technical problems to be solved by this utility model are: fixed screens rely on the weight of coal for screening, which is not thorough; some vibrating screens use a single vibration source, resulting in uneven screen plate amplitude; and traditional devices rely on manual feeding, which is labor-intensive.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a coal screening device, comprising a box body, wherein two symmetrically distributed support columns are fixedly connected to the bottom of the box body, and a box door is hinged to the front side of the box body, and further comprising...

[0006] The screening assembly, located inside the housing, includes guide columns fixedly connected between the top wall and the inner side wall of the housing, and the guide columns are symmetrically distributed. A horizontal screening plate slides on the guide columns, and a barrier is fixedly connected to the top of the screening plate.

[0007] The conveying assembly, located on one side of the housing, is used for conveying and feeding coal.

[0008] Furthermore, a spring is fitted on the guide post, and its two ends are fixedly connected to the top of the box and the top of the screening plate. A vibration motor is fixedly installed on the top of the screening plate, and it is symmetrically distributed relative to the enclosure.

[0009] Furthermore, the bottom of the box is fixedly connected to symmetrically distributed vertical plates, and a screening box is rotatably connected between the opposite side walls of the vertical plates. The screening box is located directly below the screening plate, and the screening box is reciprocated by a driving mechanism. The driving mechanism is symmetrically distributed relative to the vertical plates.

[0010] Furthermore, the driving mechanism includes a base plate fixedly connected to the bottom of the box, a stepper motor fixedly mounted on the base plate, a disk fixedly connected to the output end of the stepper motor, a guide rail fixedly connected to the bottom of the screening box, a slider sliding on the guide rail, a sliding column perpendicular to the bottom of the box sliding on the guide rail, the upper end of the sliding column hinged to the bottom of the slider, and a connecting rod rotatably connected between the lower end of the sliding column and the disk, the connecting rod and the disk being eccentrically arranged.

[0011] Furthermore, the conveying assembly includes a conveying cylinder fixedly connected to the outer wall of the housing. The bottom side of the conveying cylinder has an opening. A servo motor is fixedly installed on the top of the conveying cylinder. The output end of the servo motor is located inside the conveying cylinder, and its end is rotatably connected to the inner bottom of the conveying cylinder. A conveying blade is fixedly connected to the output end of the servo motor. A feed cylinder communicating with the outer wall of the conveying cylinder is fixedly connected to the outer wall. The lower end of the feed cylinder passes through the top of the housing and is fixedly connected to the outer wall.

[0012] Furthermore, a cylinder is fixedly connected to the bottom of the box, the sliding column passes through the cylinder and is slidably connected to it, and a vacuum cleaner is provided on the top of the box, with the input end of the vacuum cleaner located inside the box.

[0013] The beneficial effects of this utility model after adopting the above structure are as follows:

[0014] (1) The screw conveyor mechanism is adopted, and the conveying blades are driven by a servo motor to realize the automatic feeding of coal. The conveying speed is adjustable to ensure uniform and stable feeding. The closed conveying channel effectively reduces dust overflow.

[0015] (2) The dual vibration motors are symmetrically arranged, and together with the springs and guide columns, they realize the high-frequency vibration of the screen plate to ensure the initial effective classification of coal. The two stepper motors drive the screen box in a synchronous manner to achieve regular oscillation, thereby improving the screening accuracy and efficiency.

[0016] (3) The vacuum cleaner can collect the dust during operation. The cylindrical structure isolates the coal and ensures the reliable operation of the transmission components. The fully enclosed box design effectively controls the spread of dust. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the overall structure of a coal screening device proposed in this utility model.

[0019] Figure 2 This is a front sectional view of a coal screening device proposed in this utility model;

[0020] Figure 3 A cross-section of a coal screening device proposed in this utility model. Figure 1 ;

[0021] Figure 4 A cross-section of a coal screening device proposed in this utility model. Figure 2 .

[0022] In the attached diagram: 1. Box body, 2. Support column, 3. Box door, 4. Guide column, 5. Screening plate, 6. Enclosure, 7. Spring, 8. Vibration motor, 9. Vertical plate, 10. Screening box, 11. Base plate, 12. Stepper motor, 13. Disc, 14. Guide rail, 15. Slider, 16. Connecting rod, 17. Conveying cylinder, 18. Opening, 19. Servo motor, 20. Conveying blade, 21. Feeding cylinder, 22. Cylinder, 23. Vacuum cleaner, 24. Sliding column. Detailed Implementation

[0023] like Figure 1-2 As shown, a coal screening device includes a housing 1, with two symmetrically distributed support columns 2 fixedly connected to the bottom of the housing 1, a door 3 hinged to the front of the housing 1, and a vacuum cleaner 23 installed on the top of the housing 1. The input end of the vacuum cleaner 23 is located inside the housing 1. The device also includes a screening component and a conveying component. The screening component is located inside the housing 1, and the conveying component is located on one side of the housing 1 for conveying and feeding coal.

[0024] like Figure 1-4As shown, to improve the coal screening efficiency, the screening assembly includes guide columns 4 fixedly connected between the top wall and inner side wall of the box 1, and they are symmetrically distributed. A horizontal screening plate 5 slides on the guide columns 4. A barrier 6 is fixedly connected to the top of the screening plate 5. A spring 7 is sleeved on the guide columns 4, and its two ends are fixedly connected to the top of the box 1 and the top of the screening plate 5. A vibration motor 8 is fixedly installed on the top of the screening plate 5, and it is symmetrically distributed relative to the barrier 6. A vertical plate 9 is fixedly connected to the bottom of the box 1, and a screening box 10 is rotatably connected between the vertical plates 9 and their opposite side walls. The screening box 10 is located directly below the screening plate 5. The screening box 10 is reciprocated by a drive mechanism. The drive mechanism is symmetrically distributed relative to the vertical plates 9. The drive mechanism includes a bottom plate 11 fixedly connected to the bottom of the box 1, and a vibration motor 8 is fixedly installed on the bottom plate 11. A stepper motor 12 is fixedly connected to a disc 13 at its output end. A guide rail 14 is fixedly connected to the bottom of the screening box 10, and a slider 15 slides on the guide rail 14. A sliding column 24 perpendicular to the bottom of the box 1 slides on the bottom of the box 1. The upper end of the sliding column 24 is hinged to the bottom of the slider 15, and a connecting rod 16 is rotatably connected between the lower end of the sliding column 24 and the disc 13. The connecting rod 16 and the disc 13 are eccentrically arranged. Two vibration motors 8 are symmetrically arranged and work with springs 7 and guide columns 4 to achieve high-frequency vibration of the screen plate, ensuring the initial effective grading of coal. The two stepper motors 12 drive the screening box 10 synchronously to achieve regular oscillation, improving screening accuracy and efficiency. A cylinder 22 is fixedly connected to the bottom of the box 1. The sliding column 24 passes through the cylinder 22 and slides with it. The structure of the cylinder 22 isolates the coal, ensuring the reliable operation of the sliding column 24.

[0025] like Figure 1-4 As shown, in order to facilitate coal feeding and reduce dust, the conveying assembly includes a conveying cylinder 17 fixedly connected to the outer wall of the housing 1. The bottom side of the conveying cylinder 17 has an opening 18. A servo motor 19 is fixedly installed on the top of the conveying cylinder 17. The output end of the servo motor 19 is located inside the conveying cylinder 17, and its end is rotatably connected to the inner bottom of the conveying cylinder 17. The output end of the servo motor 19 is fixedly connected to a conveying blade 20. A feed cylinder 21 communicating with the outer wall of the conveying cylinder 17 is fixedly connected. The lower end of the feed cylinder 21 penetrates the top of the housing 1 and is fixedly connected to it. A spiral conveying mechanism is adopted. The servo motor 19 drives the conveying blade 20 to realize the automatic feeding of coal. The conveying speed is adjustable to ensure uniform and stable feeding. The closed conveying channel effectively reduces dust overflow.

[0026] In practical use, the lower end of the conveyor cylinder 17 is inserted into the position where coal is piled up. The servo motor 19 is turned on to make the conveyor blade 20 rotate. The coal enters the conveyor cylinder 17 through the opening 18 and is lifted at a constant speed by the conveyor blade 20. Then, it enters the box 1 through the feed cylinder 21 and falls onto the top of the screen plate. Then, the two vibration motors 8 are turned on. The screen plate vibrates up and down on the guide column 4 under the action of the spring 7, which can screen the coal. The coal after the first screening falls into the screening box 10. Then, the two stepper motors 12 are controlled to rotate synchronously. The rotation of the disc 13 can make the sliding column 24 move up and down under the action of the connecting rod 16. The sliding column 24 drives the slider 15 to slide on the guide rail 14, which can make the screening box 10 sway left and right to perform a second screening of the coal and improve the screening effect. During screening, the vacuum cleaner 23 can be turned on to collect dust. The setting of the cylinder 22 can prevent the coal falling to the bottom of the box 1 from affecting the sliding of the sliding column 24.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A coal screening device, comprising a box (1), the bottom of the box (1) is fixedly connected with two pairs of symmetrically distributed support columns (2), the front side of the box (1) is hingedly connected with a box door (3), characterized in that: Also includes The screening assembly is located inside the box (1) and includes guide columns (4) fixedly connected between the top wall and the inner side wall of the box (1) and they are symmetrically distributed. A horizontal screening plate (5) slides on the guide column (4) and a barrier (6) is fixedly connected to the top of the screening plate (5). A conveying assembly is located on one side of the housing (1) and is used for conveying and feeding coal.

2. A coal screening apparatus as claimed in claim 1, wherein: A spring (7) is fitted on the guide post (4), and its two ends are fixedly connected to the top of the box (1) and the top of the screening plate (5). A vibration motor (8) is fixedly installed on the top of the screening plate (5), and it is symmetrically distributed relative to the enclosure (6).

3. A coal sizing device according to claim 1 or 2, characterised in that: The bottom of the box (1) is fixedly connected to upright plates (9) that are symmetrically distributed front and back. A screening box (10) is rotatably connected between the upright plates (9) and their opposite side walls. The screening box (10) is located directly below the screening plate (5). The screening box (10) is reciprocated by a driving mechanism. The driving mechanism is symmetrically distributed relative to the upright plates (9).

4. A coal sizing device according to claim 3, characterised in that: The driving mechanism includes a base plate (11) fixedly connected to the bottom of the box (1), a stepper motor (12) fixedly mounted on the base plate (11), a disc (13) fixedly connected to the output end of the stepper motor (12), a guide rail (14) fixedly connected to the bottom of the screening box (10), a slider (15) sliding on the guide rail (14), a sliding column (24) perpendicular to the bottom of the box (1) sliding, the upper end of the sliding column (24) and the bottom of the slider (15) hinged together, and a connecting rod (16) rotatably connected between the lower end of the sliding column (24) and the disc (13), the connecting rod (16) and the disc (13) being eccentrically arranged.

5. A coal screening device according to claim 1, characterized in that: The conveying assembly includes a conveying cylinder (17) fixedly connected to the outer wall of the housing (1). The bottom side of the conveying cylinder (17) has an opening (18). A servo motor (19) is fixedly installed on the top of the conveying cylinder (17). The output end of the servo motor (19) is located inside the conveying cylinder (17), and its end is rotatably connected to the inner bottom of the conveying cylinder (17). The output end of the servo motor (19) is fixedly connected to a conveying blade (20). A feed cylinder (21) communicating with the outer wall of the conveying cylinder (17) is fixedly connected. The lower end of the feed cylinder (21) penetrates the top of the housing (1) and is fixedly connected to it.

6. A coal sizing device according to claim 4, characterised in that: A cylinder (22) is fixedly connected to the bottom of the box (1). The sliding column (24) passes through the cylinder (22) and is slidably connected to it. A vacuum cleaner (23) is provided on the top of the box (1). The input end of the vacuum cleaner (23) is located inside the box (1).

Images