Screening vibrating screen for separating gangue from raw coal
By adopting the staggered screen rod structure and the cam-driven swing mechanism in the screening vibrating screen separation between gangue and raw coal, the problem of screening passage is solved, the screening effect is improved and the frequency of clearing is reduced.
Patent Information
- Application Number
- CN202421614394.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In the prior art, there is a problem of screen silt when the gangue is separated from the raw coal, resulting in poor screening effect and frequent clearing of blockages.
A plurality of parallel spaced and interlaced first screen rods and second screen rods are used to form a screen body. The gangue and raw coal are screened under the action of a vibrating motor, and cams and driving parts are provided on one side of the screen so that the second screen rod can swing, pushing the raw coal and gangue stuck in the screen to prevent silt.
It effectively improves the screening effect of gangue and raw coal, reduces the phenomenon of silt in the screen, and reduces the frequency of people clearing blockages.
Smart Images
Figure CN222872690U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mine dressing, in particular to a screening vibrating screen for separating gangue from raw coal. Background Art
[0002] Due to the bottom rock tunnels, some coal mines (such as Xin'an Coal Mine where the applicant is located) cannot transport drilled coal independently and can only be transported via gangue belts. However, a large amount of gangue is mixed in the gangue belt transportation, and the cost of packaging and transportation is too high, resulting in waste of drilled coal and also posing a risk of self-ignition to the gangue mountain. Gangue is often discharged to the gangue mountain through the gangue belt. During the discharge process, it passes through a fixed gangue chute to screen the raw coal in the gangue. The effect is poor and it is frequently blocked, which not only affects the operation of the gangue system, but also increases the workload of employees.
[0003] In order to solve the above technical problems, the applicant made a self-made screening vibrating screen for separating gangue and raw coal. The 5mm thick steel plate was processed into a screen frame with an open bottom. The open bottom of the screen frame was welded with 5cm round steel to form a screen rod. The spacing between each screen rod was 5cm, and a screen path for the raw coal to fall was formed between any adjacent screen rods. The four corners of the screen frame use spring cylinders as buffer devices, four support frames are installed under the spring cylinders, and vibration motors are installed on both sides of the screen frame. Through the above technical scheme, when the raw materials pass through the screening vibrating screen, most of the raw coal falls from the screen path under the action of the vibration motor, while most of the gangue continues to slide down with the screen rod, the screening effect is better, and the clogging situation is improved.
[0004] However, during the continuous implementation, it was found that the above-mentioned screen path still had clogging, which might be due to the fact that the larger pieces of raw coal or gangue bounced on the screen bars under the action of the vibration motor, and then "smashed" into the screen path under the action of its own gravity and got stuck between the two screen bars. The strength of the connection between some of the above-mentioned larger pieces of raw coal or gangue and the screen bars was greater than the shaking effect of the vibration motor, which led to the accumulation of raw materials and clogging, and personnel still needed to frequently clear the blockage. Utility Model Content
[0005] The utility model aims to provide a screening vibrating screen for separating gangue and raw coal, thereby improving the screening effect of raw materials and further reducing the frequency of clearing blockages by personnel.
[0006] In order to solve the above technical problems, the specific solution adopted by the utility model is: a screening vibrating screen for separating gangue and raw coal, comprising a screen frame with an open bottom, a vibration motor is provided on the side of the screen frame, and a screen body is provided at the bottom of the screen frame for screening gangue and raw coal under the action of the vibration motor, the screen body is composed of a plurality of first screen bars and a plurality of second screen bars which are parallel, spaced and staggered, and the gaps between adjacent first screen bars and second screen bars form a screen path for the raw coal to fall, both ends of the first screen bar are fixedly connected to the screen frame, one end of the second screen bar is hingedly connected to the screen frame, and the other end is elastically connected to the screen frame, and a cam and a driving member for driving the cam to rotate are rotatably provided at the position on the screen frame corresponding to the elastic connection of the second screen bar, and the wheel rims of the cam are respectively in contact with the corresponding second screen bars.
[0007] Preferably, the driving member includes a wheel axle and a driving motor for driving the wheel axle to rotate, and the cams are fixedly arranged on the wheel axle.
[0008] Preferably, the wheel axles are distributed in the horizontal direction.
[0009] Preferably, shields are provided on the screen frame at the end positions corresponding to the first screen bar and the second screen bar, and strip holes are provided on the shields for the end of the second screen bar to swing.
[0010] Preferably, the second screen bars are each provided with a flat plate for the cam to contact and cooperate with.
[0011] Preferably, the second screen rod is connected to the screen frame via a spring.
[0012] Preferably, the screen frame is made of welded steel plates, and the first screen bar and the second screen bar are made of round steel.
[0013] Preferably, the outer diameters of the first sieve rod and the second sieve rod are 4-6 cm, and the spacing between adjacent first sieve rods and second sieve rods is 4-6 cm.
[0014] The utility model comprises a plurality of parallel, spaced and staggered first screen bars and second screen bars to form a screen body, and the gaps between any adjacent first screen bars and second screen bars form screen paths. Under the action of a vibrating motor, most of the raw coal in the passing raw materials can fall through the screen paths, and most of the gangue can continue to slide down along the first screen bars and the second screen bars, so that the screening effects of the two are better and the clogging situation is improved.
[0015] Furthermore, the second screen bar in the utility model can continuously swing under the action of the continuously rotating cam, so that the position of the screen path corresponding to the side of the second screen bar is continuously changed, and then the raw coal and gangue that are stuck between the first screen bar and the second screen bar after bouncing due to the action of the vibration motor can be pushed upward, thereby preventing the blockage caused by the raw coal or gangue getting stuck in the screen path to a great extent, and further reducing the frequency of personnel clearing the blockage. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of the top view of the screen body of the utility model, and Figure 1 The shield is hidden in the middle;
[0017] Figure 2 for Figure 1 The AA section structure diagram in FIG. Figure 2 The shield is shown in;
[0018] Figure 3 for Figure 1 The BB section structure diagram in FIG. Figure 3 The shield is shown in
[0019] Markings in the figure: 1. driving motor, 2. axle, 3. screen frame, 4. spring, 5. cam, 6. plate, 7. second screen bar, 8. first screen bar, 9. screen channel, 10. rotating shaft, 11. hinge groove, 12. protective cover. DETAILED DESCRIPTION
[0020] The utility model is a screening vibrating screen for separating gangue from raw coal, which is the same as a conventional vibrating screen, and includes a screen frame 3, a bracket for supporting the screen frame 3, a screen body arranged at an open position at the bottom of the screen frame 3, and a vibration motor arranged at the side of the screen frame 3. When the raw material passes through, the vibration motor drives the screen frame 3 and the screen body to vibrate continuously, so that the gangue with a larger size slides down along the screen body, while the raw coal with a smaller size passes through the screen body and falls down for further collection.
[0021] like Figure 1 As shown, the screen body of the utility model is different from that of the conventional vibrating screen in that the screen body of the utility model is a plurality of parallel and staggered first screen bars 8 and second screen bars 7, and the gaps between any adjacent first screen bars 8 and second screen bars 7 form a screen path 9 for the raw coal to pass through and fall. In order to further reduce the clogging during the implementation process, one side of the screen path 9 in the utility model can move back and forth, thereby reducing the risk of gangue and raw coal in the raw material being stuck in the screen path 9, specifically:
[0022] Combination Figure 1 and Figure 3 As shown, two ends of the first screen rod 8 are respectively welded and fixed to the left side of the screen frame 3 and the right side of the screen frame 3 .
[0023] Combination Figure 1 and Figure 2As shown, the left end of the second screen bar 7 is fixed with a rotating shaft 10 distributed in the horizontal direction, and a hinge groove 11 is provided on the right side surface of the left side of the screen frame 3. The two ends of the rotating shaft 10 are respectively rotatably matched with the shaft holes provided on the groove walls on the front and rear sides of the hinge groove 11, so that the right end of the second screen bar 7 can rotate around the rotating shaft 10 under the action of external force. The right end of the second screen bar 7 is connected to the right side of the screen frame 3 through a spring 4. At the same time, a driving mechanism for driving the right end of the second screen bar 7 to swing back and forth is also provided on the right side of the screen frame 3. The driving mechanism includes a wheel shaft 2 distributed in the horizontal direction and a driving motor 1 for driving the wheel shaft 2 to rotate. The wheel shaft 2 is rotatably mounted on the right side of the screen frame 3, and the driving motor 1 is fixed on the right side of the screen frame 3 and directly connected to the wheel shaft 2. Cams 5 corresponding to the right end of the second screen bar 7 are arranged on the wheel shaft 2 at intervals, and the wheel rims of the cams 5 are all in contact with the upper edge of the flat plate 6 fixed on the corresponding second screen bar 7. Therefore, when the drive motor 1 drives the wheel shaft 2 to rotate, the cam 5 presses the flat plate 6 to move the right end of the second screen bar 7 downward. After the convex part of the cam 5 rotates away from the flat plate 6, the spring 4 pulls the right end of the second screen bar 7 up, so that the right end of the second screen bar 7 swings back and forth, thereby pushing the gangue or raw coal stuck in the screen channel 9, producing an anti-clogging effect.
[0024] like Figure 2 and Figure 3 As shown, a protective cover 12 is fixedly provided on the right side of the screen frame 3, and the protective cover 12 covers the cam 5, the wheel shaft 2 and other structures, so as to avoid the raw coal or gangue from being hit during the jumping process, and effectively prolongs the service life of the utility model. In order not to interfere with the swing of the right end of the second screen bar 7, a vertically distributed strip hole is provided on the left side of the protective cover 12 to adapt to the movement stroke of the right end of the second screen bar 7. In order to protect the hinge structure of the left end of the second screen bar 7, a protective cover 12 of the same structure can also be provided on the left side of the screen frame 3.
[0025] In this embodiment, the sieve frame 3 is made of 5 mm thick steel plate by welding, the first sieve bar 8 and the second sieve bar 7 are both made of round steel with an outer diameter of 5 cm, and the spacing between adjacent first sieve bars 8 and second sieve bars 7 is 5 cm.
Claims
1. A screening vibrating screen for separating gangue from raw coal, comprising a screen frame (3) with an open bottom, a vibration motor provided on the side of the screen frame (3), and a screen body provided at the bottom of the screen frame (3) for screening gangue and raw coal under the action of the vibration motor, characterized in that: The screen body is composed of a plurality of first screen bars (8) and a plurality of second screen bars (7) which are spaced apart in parallel and staggered. The gaps between adjacent first screen bars (8) and second screen bars (7) form screen paths (9) for raw coal to fall through. Both ends of the first screen bars (8) are fixedly connected to the screen frame (3). One end of the second screen bars (7) is hingedly connected to the screen frame (3), and the other end is elastically connected to the screen frame (3). A cam (5) and a driving member for driving the cam (5) to rotate are rotatably provided at a position on the screen frame (3) corresponding to the elastic connection of the second screen bars (7). The wheel rims of the cam (5) are in contact with the second screen bars (7) respectively.
2. A screening vibrating screen for separating gangue and raw coal as claimed in claim 1, characterized in that: The driving member comprises a wheel axle (2) and a driving motor (1) for driving the wheel axle (2) to rotate, and the cams (5) are fixedly arranged on the wheel axle (2).
3. A screening vibrating screen for separating gangue and raw coal as claimed in claim 2, characterized in that: The wheel axles (2) are distributed in the horizontal direction.
4. The vibrating screen for separating gangue and raw coal according to claim 1, characterized in that: The screen frame (3) is provided with a protective cover (12) at the end positions corresponding to the first screen bar (8) and the second screen bar (7), and the protective cover (12) is provided with a strip hole for the end of the second screen bar (7) to swing.
5. The vibrating screen for separating gangue and raw coal according to claim 1, characterized in that: The second screen rod (7) is provided with a flat plate (6) for the cam (5) to contact and cooperate with.
6. The vibrating screen for separating gangue and raw coal according to claim 1, characterized in that: The second screen rod (7) is connected to the screen frame (3) via a spring (4).
7. The vibrating screen for separating gangue and raw coal according to claim 1, characterized in that: The screen frame (3) is made by welding steel plates, and the first screen bar (8) and the second screen bar (7) are made by round steel.
8. A screening vibrating screen for separating gangue and raw coal as claimed in claim 7, characterized in that: The outer diameters of the first sieve rod (8) and the second sieve rod (7) are 4-6 cm, and the spacing between adjacent first sieve rods (8) and second sieve rods (7) is 4-6 cm.