A screening device for coal processing

Abstract

The utility model discloses a screening device for coal processing, including collecting box no.

Description

Technical Field

[0001] This utility model belongs to the field of coal screening technology, specifically referring to a screening device for coal processing. Background Technology

[0002] Coal screening devices are key equipment used in the coal sorting process to classify and separate coal according to particle size. Their core function is to separate the mined raw coal into products of different particle size grades through different screening methods to meet the needs of subsequent processing (such as washing, crushing, coking, etc.) or direct use.

[0003] In existing technologies, the common screening method is to use a vibrating screen. Coal moves forward on the screen surface due to vibration. Particles smaller than the screen holes fall through the screen, while particles larger than the screen holes are intercepted and discharged. However, there are some shortcomings in its use: vibrating screens generally move horizontally back and forth. Although screening can be achieved, the coal left on the screening frame is not easy to be discharged in time. It is necessary to manually clean the coal left on the screening frame before continuing screening, which affects the continuity of screening. Therefore, improvements are needed. Summary of the Invention

[0004] The technical problem this invention aims to solve is that in the prior art, when screening coal using a linear reciprocating screening method, the coal remaining on the screening frame is not easy to discharge in a timely manner, requiring manual labor to clean it off, which affects the continuous screening process and is inefficient.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: A screening device for coal processing includes a collection box one, a collection box two arranged side by side on the side of the collection box one, support troughs symmetrically arranged on both sides of the upper end of the collection box one, a screening frame with one end open arranged above the collection box one, a sliding shoe arranged at the lower end of the screening frame and sliding in the support trough, a screening drive device arranged on the support trough and the side wall of the screening frame for the screening frame to move back and forth, a horizontal plate fixed to the upper end of the screening frame, the horizontal plate being located above the side opening of the screening frame, a side opening device arranged in the horizontal plate, and an inclined unloading device arranged on the support trough and the screening frame to lift and tilt one end of the screening frame to pour the coal in the screening frame into the collection trough two.

[0006] Furthermore, the inclined unloading device includes a fixed plate, which is horizontally fixed to the side wall of the support trough plate. An electric push rod is vertically fixed to the upper end of the fixed plate, and a sliding column is connected to the output end of the electric push rod. A limiting groove is horizontally fixed to the side wall of the screening frame, and the sliding column is located in the limiting groove.

[0007] Furthermore, the side-opening door device includes a bracket, which is fixed to the upper end of the horizontal plate in an inverted L shape. An electric push rod is fixed vertically downward on the top wall of the bracket. The output end of the electric push rod is connected to a stop door and is adapted to seal the side opening of the screening frame. Two sets of guide rods are symmetrically provided on the upper end of the stop door and both extend upward through the horizontal plate.

[0008] Furthermore, the screening drive device includes a trough frame, which is fixedly connected to the side wall of the supporting trough plate. A motor is fixedly connected to the trough frame, and an eccentric wheel is coaxially connected to the output end of the motor. A connecting column is horizontally fixed to the side wall of the screening frame, and a circular plate is rotatably provided at the end of the connecting column. The eccentric wheel is attached to the circular plate. A spring is horizontally fixed in the supporting trough plate, with one end of the spring fixedly connected to the side wall of the supporting trough plate and the other end connected to the sliding shoe.

[0009] Furthermore, a guide plate is hinged to the upper end of the second collection box near the first collection box via louvers, and the guide plate can be rotatably attached to the screening frame.

[0010] Furthermore, the spring maintains tension on the slipper so that the circular plate adheres to the eccentric wheel.

[0011] The beneficial effects achieved by adopting the above-described structure are as follows: 1. This utility model, by setting up an inclined unloading device, allows the sliding column to slide in the limiting groove through the extension and retraction of the second electric push rod, and can lift one end of the screening frame, so that the screening frame will tilt towards the second collection box. By pulling the first electric push rod, the baffle door is moved upward, so that the screening frame is in the open state, and the coal remaining in the screening frame can be poured into the second collection box for continuous screening.

[0012] 2. By setting a guide plate, the guide plate is rotated and overlapped at the edge of the screening frame before the screening frame starts to pour, so that the coal will not fall out of the gap between the collection box one and the collection box two when it is poured.

[0013] 3. This utility model sets up a screening drive device, which drives the eccentric wheel to rotate through a motor. The eccentric wheel can strike the circular plate. When the spring pulls the sliding shoe, the screening frame can reciprocate, thereby achieving screening. Attached Figure Description

[0014] Figure 1 This utility model describes the overall structure of a screening device for coal processing. Figure 1 ; Figure 2 This utility model describes the overall structure of a screening device for coal processing. Figure 2 ; Figure 3 This utility model describes the overall structure of a screening device for coal processing. Figure 3 ; Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle.

[0015] Among them, 1. Collection box one, 2. Collection box two, 3. Support trough plate, 4. Screening frame, 5. Slipper, 6. Horizontal plate, 7. Side opening device, 8. Screening drive device, 9. Inclined unloading device, 10. Fixed plate, 11. Electric push rod two, 12. Sliding column, 13. Limiting groove, 14. Bracket, 15. Electric push rod one, 16. Stop door, 17. Guide rod, 18. Trough frame, 19. Motor, 20. Eccentric wheel, 21. Connecting column, 22. Circular plate, 23. Spring, 24. Guide plate. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0018] like Figure 1-4This utility model discloses a screening device for coal processing, comprising a collection box 1, a collection box 2 arranged side-by-side on the side of the collection box 1, support troughs 3 symmetrically arranged on both sides of the upper end of the collection box 1, and a screening frame 4 with one open end arranged above the collection box 1. A guide plate 24 is hinged to the upper end of the collection box 2 near the collection box 1 via louvers. The guide plate 24 can rotatably overlap the screening frame 4, so that when the screening frame 4 is emptied, the coal can flow along the guide plate 24 into the collection box 2, preventing coal from spilling out of the collection box. The gap between collection box 1 and collection box 2 falls out. The lower end of the screening frame 4 is provided with a sliding shoe 5 and slides in the support trough plate 3. The support trough plate 3 and the side wall of the screening frame 4 are provided with a screening drive device 8 to allow the screening frame 4 to move back and forth. The upper end of the screening frame 4 is horizontally fixed with a horizontal plate 6. The horizontal plate 6 is located above the side opening of the screening frame 4. The horizontal plate 6 is provided with a side opening device 7. The support trough plate 3 and the screening frame 4 are provided with an inclined unloading device 9 to lift and tilt one end of the screening frame 4 to pour the coal in the screening frame 4 into the collection trough 2.

[0019] like Figure 1-4 The tilting unloading device 9 includes a fixed plate 10, which is horizontally fixed to the side wall of the support trough plate 3. An electric push rod 11 is vertically fixed to the upper end of the fixed plate 10. The output end of the electric push rod 11 is connected to a sliding column 12. A limiting groove 13 is horizontally fixed to the side wall of the screening frame 4. The sliding column 12 is located in the limiting groove 13. By activating the electric push rod 11, the sliding column 12 can lift the limiting groove 13, causing the screening frame 4 to tilt towards the collection box 2, so that the coal in the screening frame 4 can be quickly dumped out.

[0020] like Figure 1 and 3 The side-opening door device 7 includes a bracket 14, which is fixed to the upper end of the horizontal plate 6 in an inverted L shape. An electric push rod 15 is fixed vertically downward on the top wall of the bracket 14. The output end of the electric push rod 15 is connected to a baffle 16 and is adapted to seal the side opening of the screening frame 4. Two sets of guide rods 17 are symmetrically provided on the upper end of the electric push rod 15 and both extend upward through the horizontal plate 6. The baffle 16 can be lifted by the electric push rod 15, so that when the screening frame 4 is tilted, the coal in the screening frame 4 can be smoothly poured into the collection box 2.

[0021] like Figure 1-3The screening drive device 8 includes a trough frame 18, which is fixed to the side wall of the support trough plate 3. A motor 19 is fixed to the trough frame 18, and an eccentric wheel 20 is coaxially connected to the output end of the motor 19. A connecting column 21 is horizontally fixed to the side wall of the screening frame 4. A circular plate 22 is rotatably mounted at the end of the connecting column 21. The eccentric wheel 20 is attached to the circular plate 22. A spring 23 is horizontally fixed in the support trough plate 3. One end of the spring 23 is fixed to the side wall of the support trough plate 3, and the other end is connected to the sliding shoe 5. The spring 23 maintains a pulling force on the sliding shoe 5 so that the circular plate 22 is attached to the eccentric wheel 20. When the eccentric wheel 20 strikes the circular plate 22, the sliding shoe 5 can slide in the support trough plate 3 under the action of the spring 23, thereby realizing the reciprocating motion of the screening frame 4 and screening the coal. The screened coal falls into the collection box 1 below.

[0022] In practical use, the coal to be screened is poured into the screening frame 4. At this time, the gate 16 is in a closed state. Then, the motor 19 is started, and the motor 19 drives the eccentric wheel 20 to rotate. The eccentric wheel 20 will strike the circular plate 22, so the sliding shoe 5 will slide in the support groove plate 3. Rollers can be set at the bottom of the sliding shoe 5 and slide in the support groove plate 3 to reduce the friction of reciprocating motion. When the sliding shoe 5 reciprocates, it will be pulled by the spring 23, so that continuous reciprocating motion can be achieved. In this way, the coal in the screening frame 4 can be screened into the collection box 1 below.

[0023] Large-diameter coal particles remain in the screening frame 4. When it is necessary to pour out the large-diameter coal particles from the screening frame 4, firstly, by controlling the start of the electric push rod 15, the baffle 16 will be pulled upward, and at the same time, the guide rod 17 will slide in the horizontal plate 6, and the baffle will be in the open state. Then, the guide plate 24 will be lifted and overlapped on the screening frame 4. By controlling the electric push rod 11, the sliding column 12 will slide in the limiting groove 13 and be lifted at the same time. In this way, the screening frame 4 will tilt towards the collection box 2, so that the coal in the screening frame 4 will roll smoothly into the collection box 2. Then, the screening frame 4 will be leveled, and coal can be added to the screening frame 4 for continuous screening.

[0024] It should be noted that the motor 19, electric push rod 15, and electric push rod 11 in the solution all need to be connected to the power supply via cables and centrally controlled by a switch, which is existing technology. At the same time, electric push rod 15 and electric push rod 11 can also be replaced by hydraulic cylinders. The hydraulic cylinders are connected to the hydraulic pump station and controlled by control valves. In practical applications, the application can be flexibly selected. Those skilled in the art can clearly understand its working principle, so it will not be described in detail here.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures 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 screening device for coal processing, characterized in that: It includes a collection box 1 (1) and a collection box 2 (2) arranged side by side. The upper end of the collection box 1 (1) is symmetrically fixed with a support groove plate (3). A screening frame (4) is slidably connected on the support groove plate (3). The lower end of the screening frame (4) is provided with a sliding shoe (5) and the sliding shoe (5) is embedded in the sliding groove of the support groove plate (3). One end of the screening frame (4) is an open structure and a horizontal plate (6) is fixedly connected above its open end. The side walls of the support trough plate (3) and the screening frame (4) are provided with a screening drive device (8) to drive the screening frame (4) to reciprocate left and right. The horizontal plate (6) is provided with a side door device (7) for controlling the opening and closing of the screening box (4). An inclined unloading device (9) is provided between the support trough plate (3) and the screening frame (4) to lift the opening end of the screening frame (4) towards the collection box (2).

2. The screening device for coal processing according to claim 1, characterized in that: The inclined unloading device (9) includes a fixed plate (10) horizontally fixed to the side wall of the support trough plate (3). An electric push rod (11) is vertically fixed to the upper end of the fixed plate (10). A sliding column (12) is connected to the output end of the electric push rod (11). A limiting groove (13) is horizontally fixed to the side wall of the screening frame (4). The sliding column (12) is slidably embedded in the limiting groove (13).

3. A screening device for coal processing according to claim 1, characterized in that: The side-opening door device (7) includes an inverted L-shaped bracket (14), which is vertically fixed to the upper end of the horizontal plate (6). An electric push rod (15) is vertically fixed to the top wall of the bracket (14). The output end of the electric push rod (15) is connected to a blocking door (16) that blocks the opening of the screening frame (4). A guide rod (17) that penetrates the horizontal plate (6) is symmetrically fixed to the upper end of the blocking door (16).

4. A screening device for coal processing according to claim 1, characterized in that: The screening drive device (8) includes a trough frame (18) fixed to the side wall of the support trough plate (3), a motor (19) fixed to the trough frame (18), an eccentric wheel (20) coaxially connected to the output end of the motor (19), a connecting column (21) horizontally fixed to the side wall of the screening frame (4), a circular plate (22) rotatably connected to the end of the connecting column (21) and in contact with the eccentric wheel (20), and a spring (23) horizontally fixed inside the support trough plate (3), one end of the spring (23) fixed to the side wall of the support trough plate (3) and the other end connected to the slipper (5).

5. A screening device for coal processing according to claim 1, characterized in that: The upper end of the collection box (2) is hinged with a guide plate (24) via louvers, and the guide plate (24) can be rotatably attached to the edge of the opening end of the screening frame (4).

6. A screening device for coal processing according to claim 4, characterized in that: The spring (23) continuously applies tension to the slipper (5) to keep the circular plate (22) in contact with the eccentric wheel (20).

7. A screening device for coal processing according to claim 2, characterized in that: The sliding column (12) and the limiting groove (13) form a sliding pair. When the electric push rod (11) extends, it drives the screening frame (4) to rotate and tilt around the support groove plate (3).

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