Feed coal screening device

Abstract

The utility model relates to a feed coal screening device, and belongs to the technical field of feed coal screening. Comprising a box body, multiple guide rails and multiple screening boxes, one sides of the guide rails are fixedly connected with shaft rods, the ends, away from the guide rails, of the shaft rods are rotationally connected with bearing seats, the bearing seats are fixedly connected to the inner side wall of the box body, and the guide rails and the bearing seats form a rotating structure through the shaft rods. Through the arrangement of the movable frame and the screen box, when the movable frame and the screen box slide left and right, the movable frame and the screen box slide relatively, and as the shaking track of the screen box is in a relatively movable state, feed coal in the screen box can be screened more effectively, and the screening effect is further improved. And after screening is finished, the movable frame and the screening box are indirectly driven to incline through the third hydraulic rod, at the moment, the feed coal which does not pass through the screening holes in the screening box slides into the receiving groove with the corresponding height along with the change of the inclination angle, mechanical automatic cleaning is achieved, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of raw coal screening, in particular to a raw coal screening device. Background Art

[0002] Raw coal usually refers to unprocessed coal raw materials, coal mined directly from mines or mines. When making PCI, the raw coal needs to be processed and treated to meet the production requirements of PCI. First, the raw coal needs to be screened using a screening device, and the screened coal is stored in bins according to different particle size grades. Then, according to the actual production situation, the discharge amount of coal bins of different particle size grades is adjusted so that the mixed PCI coal meets the predetermined particle size distribution.

[0003] After searching, the utility model patent with the publication number "CN217141108U" discloses a raw coal particle size screening device for a coal preparation plant, including a box body, a feed hopper connected to the inner cavity of the box body is fixedly connected to the top of the box body, a cylinder is fixedly installed on one side of the box body, a screening component is arranged in the inner cavity of the box body, vibration components are arranged on both sides of the screening component, a slot is opened at the bottom of the inner cavity of the box body, and a collecting component is arranged in the slot. The device can quickly screen the raw coal, thereby improving the screening efficiency.

[0004] However, since the output end of the cylinder is fixedly connected to one side of the screening frame, when the cylinder drives the screening frame to swing left and right, the swing path and amplitude of the screening frame will be affected by the output end of the cylinder, so that the screening frame can only move back and forth with the output end of the cylinder, thereby affecting the screening effect. Secondly, after the screening is completed, since there is raw coal that has not passed through the screen inside the screening frame, it needs to be cleaned up by manual dumping, which will consume a lot of time and energy. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a raw coal screening device. The technical solution of the utility model is as follows:

[0006] A raw coal screening device comprises a box body, multiple groups of guide rails and multiple groups of screen boxes, the upper surface of the box body is connected with a feeding port, the lower surface of the box body is connected with a feeding port, one side of the guide rail is fixedly connected with a shaft rod, the end of the shaft rod away from the guide rail is rotatably connected with a bearing seat, and the bearing seat is fixedly connected to the inner side wall of the box body, and the guide rail forms a rotating structure with the bearing seat through the shaft rod, one group of the shaft rods is fixedly connected with a gear on the outer side, one side of the gear is meshed with a rack, and the upper surface of the rack is fixedly connected with a hydraulic rod 1 for adjusting the height of the rack, and the two groups of guide rails are connected by a fixed plate, one side of the fixed plate is fixedly connected with a hydraulic rod 2, and the telescopic end of the hydraulic rod 2 is fixedly connected with a movable frame, the inner bottom surface of the movable frame is penetrated with a feeding trough, and multiple groups of springs are fixedly connected to the left and right sides of the interior of the movable frame, and the movable frame is away from the side of the hydraulic rod 2 A through slot is provided through it, the screen box is slidably connected to the inside of the movable frame, and multiple groups of screen holes on the surface of the screen box become smaller from top to bottom, and the end of the spring away from the movable frame is fixedly connected to the screen box, an outlet is provided through it on the side of the screen box away from the hydraulic rod 2, the inside of the screen box and both sides close to the outlet are fixedly connected with a guide seat, the outlet is slidably connected with a baffle, one side of the baffle is fixedly connected with a fixed seat, the outer wall of the screen box and both sides located at the outlet are fixedly connected with a support seat, a hydraulic rod three for adjusting the position of the baffle is connected between the support seat and the fixed seat, and the hydraulic rod one, hydraulic rod two and hydraulic rod three are all electrically connected to the control box, and multiple groups of discharge ports are provided on the side of the box body away from the fixed plate, one side of the discharge port and the inner wall of the box body are fixedly connected with a receiving groove, and the other side of the discharge port and the outer wall of the box body are fixedly connected with a discharge hopper.

[0007] Optionally, a slider is fixedly connected to the side of the rack away from the gear, a slide rail is fixedly connected to the inner wall of the box body and close to the rack, the slider is slidably connected to the inside of the slide rail, and an L-shaped bracket for fixing a hydraulic rod is fixedly connected to the upper surface of the slide rail.

[0008] Optionally, a lower hopper is fixedly connected to the lower surface of the movable frame and is located below the lower chute, and the lower hopper is a funnel structure.

[0009] Optionally, both sides of the movable frame are rotatably connected to pulleys via short shafts, and the pulleys are slidably connected inside the guide rails.

[0010] Optionally, guide grooves are provided on both the front and rear sides of the movable frame, guide blocks are fixedly connected to both sides of the outer wall of the screen box, and the guide blocks are slidably connected to the inside of the guide groove on the corresponding side.

[0011] Optionally, slots are provided on one side of the sieve box and on both sides of the opening, and the baffle is slidably connected inside the slots.

[0012] Optionally, a limiting groove is formed through one side of the slot, a limiting block is fixedly connected to the side wall of the baffle, and the limiting block is slidably connected to the inside of the limiting groove.

[0013] Optionally, a guard plate is fixedly connected to a side of the fixing seat away from the hydraulic rod three.

[0014] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations.

[0015] By means of the above scheme, the beneficial effects of the utility model are as follows:

[0016] 1. Through the setting of the movable frame and the screen box, when screening the raw coal, the control box drives the hydraulic rod 2 to operate, and the telescopic end of the hydraulic rod 2 reciprocates, thereby driving the movable frame and the screen box to slide left and right. At the same time, the movable frame and the screen box are fixedly connected by a spring, so that when the movable frame slides left and right, the movable frame and the screen box will also slide relative to each other. Since the shaking track of the screen box is in a relatively active state, the raw coal inside the screen box can be screened more effectively, thereby further improving the screening effect.

[0017] 2. After the screening is completed, first open the baffle at the exit of the screen box by driving the hydraulic rod three. Then drive the rack downward through the hydraulic rod three, and the gear cooperates with the rack to rotate, thereby driving the movable frame and the screen box to tilt through the shaft rod. At this time, the raw coal inside the screen box that has not passed through the sieve hole will slide into the receiving groove of the corresponding height as the tilt angle changes, realizing mechanized cleaning, saving time and effort. During the dumping process, the telescopic end of the hydraulic rod two can also be driven to reciprocate and telescope, driving the screen box to shake, so as to completely dump the raw coal remaining inside the screen box.

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the raw coal screening device provided by the utility model;

[0020] Figure 2 A front cross-sectional view of the raw coal screening device provided by the utility model in a working state;

[0021] Figure 3 A cross-sectional view of the raw coal screening device provided by the utility model in another working state;

[0022] Figure 4 A top view of the raw coal screening device provided by the utility model;

[0023] Figure 5 It is a schematic diagram of the exploded structure of the guide rail, hydraulic rod 1, movable frame, screen box and baffle in the utility model;

[0024] Figure 6 It is a schematic diagram of the exploded structure of the rack, the slider and the slide rail in the utility model;

[0025] Figure 7 It is a schematic diagram of the exploded structure of the movable frame in the utility model;

[0026] Figure 8 It is a schematic diagram of the exploded structure of the matching of the screen box and the baffle in the utility model.

[0027] Numbers in the figure: 1. Box body; 11. Feed inlet; 12. Feed outlet; 13. Feed outlet; 2. Guide rail; 21. Fixed plate; 22. Shaft; 23. Bearing seat; 24. Gear; 25. Rack; 251. Slider; 26. Hydraulic rod one; 27. Slide rail; 271. L-shaped bracket; 3. Hydraulic rod two; 4. Movable frame; 41. Feed chute; 42. Feed hopper; 43. Spring; 44. Through groove; 45. Pulley; 46. Guide groove; 5. Screen box; 51. Guide block; 52. Outlet; 521. Slot; 522. Limiting groove; 53. Guide seat; 6. Baffle; 61. Limiting block; 62. Fixed seat; 63. Support seat; 64. Hydraulic rod three; 65. Guard plate; 7. Receiving groove; 8. Feed hopper. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] See also Figure 1-8As shown, the utility model provides a raw coal screening device, including a box body 1, multiple groups of guide rails 2 and multiple groups of screen boxes 5, the upper surface of the box body 1 is connected with a feed inlet 11, the lower surface of the box body 1 is connected with a feed outlet 12, one side of the guide rail 2 is fixedly connected with a shaft rod 22, one end of the shaft rod 22 away from the guide rail 2 is rotatably connected with a bearing seat 23, and the bearing seat 23 is fixedly connected to the inner side wall of the box body 1, the guide rail 2 forms a rotating structure with the bearing seat 23 through the shaft rod 22, and the outer side of one group of shaft rods 22 is fixedly connected to the outer side of the guide rail 22. A gear 24 is fixedly connected, a rack 25 is meshed on one side of the gear 24, a hydraulic rod 26 for adjusting the height of the rack 25 is fixedly connected to the upper surface of the rack 25, two sets of guide rails 2 are connected through a fixed plate 21, a hydraulic rod 23 is fixedly connected to one side of the fixed plate 21, a movable frame 4 is fixedly connected to the telescopic end of the hydraulic rod 23, a material discharge trough 41 is provided through the inner bottom surface of the movable frame 4, multiple sets of springs 43 are fixedly connected to the left and right sides of the inner part of the movable frame 4, and the movable frame 4 is away from the hydraulic rod 2 A through slot 44 is provided on one side of the movable frame 4, the sieve box 5 is slidably connected to the inside of the movable frame 4, and the sieve holes on the surfaces of the multiple groups of sieve boxes 5 are successively smaller from top to bottom, and the end of the spring 43 away from the movable frame 4 is fixedly connected to the sieve box 5, and an outlet 52 is provided on the side of the sieve box 5 away from the hydraulic rod 23, and the inside of the sieve box 5 and both sides close to the outlet 52 are fixedly connected with a guide seat 53, the outlet 52 is slidably connected to a baffle 6, and one side of the baffle 6 is fixedly connected to a fixed seat 62, and the outer wall of the sieve box 5 And support seats 63 are fixedly connected on both sides of the outlet 52, and hydraulic rod three 64 for adjusting the position of the baffle 6 is connected between the support seat 63 and the fixed seat 62, and hydraulic rod one 26, hydraulic rod two 3 and hydraulic rod three 64 are all electrically connected to the control box, and multiple groups of discharge ports 13 are opened on the side of the box body 1 away from the fixed plate 21, and a receiving groove 7 is fixedly connected to one side of the discharge port 13 and on the inner wall of the box body 1, and a discharge hopper 8 is fixedly connected to the other side of the discharge port 13 and on the outer wall of the box body 1.

[0030] The utility model screens the raw coal according to different particle sizes by installing multiple groups of screen boxes 5 with different screen hole diameters (the number of screen boxes 5 is determined according to the actual screening situation). During the screening process of the raw coal, the telescopic end of the hydraulic rod 2 3 is reciprocated and retracted by the control box to realize the movable frame 4 sliding left and right inside the two groups of guide rails 2, thereby driving the screen box 5 to shake left and right. The movable frame 4 is connected to the screen box 5 by a spring 43, which increases the frequency of the shaking of the screen box 5 and helps to screen out the raw coal smaller than the screen hole diameter of the screen box 5. After the screening of the raw coal is completed, the telescopic end of the hydraulic rod 3 64 can be retracted by the control box, so that the baffle 6 at the outlet 52 is opened. Then the telescopic end of the hydraulic rod 1 26 is extended by the control box, thereby driving the rack 25 to move downward. Under the transmission action of the rack 25, the gear 24 will drive the movable frame 4 to tilt through the shaft rod 22, thereby dumping the raw coal that has not passed through the screen hole in the screen box 5 into the receiving groove 7 of the corresponding height, and finally discharged through the discharge port 13 and the discharge hopper 8. In the process of dumping the raw coal, the telescopic end of the hydraulic rod 23 can also be driven to reciprocate and telescope, thereby accelerating the speed at which the raw coal falls from the screen box 5.

[0031] The function of the guide seat 53 is that during the process of pouring the raw coal, the raw coal inside the screen box 5 will slide along the guide seat 53 to the position of the outlet 52, so as to ensure that the raw coal inside the screen box 5 is completely discharged.

[0032] Furthermore, a slider 251 is fixedly connected to the side of the rack 25 away from the gear 24, and a slide rail 27 is fixedly connected to the inner wall of the box 1 and the side close to the rack 25. The slider 251 is slidably connected inside the slide rail 27, and an L-shaped bracket 271 for fixing the hydraulic rod 1 26 is fixedly connected to the upper surface of the slide rail 27; when the telescopic end of the hydraulic rod 1 26 drives the rack 25 to move up and down, the rack 25 drives the slider 251 to slide inside the slide rail 27. The slide rail 27 can indirectly guide and limit the rack 25 by limiting the slider 251.

[0033] Furthermore, a lower hopper 42 is fixedly connected to the lower surface of the movable frame 4 and located below the lower chute 41, and the lower hopper 42 is a funnel structure; the raw coal smaller than the diameter of the sieve hole of the sieve box 5 will fall from the sieve box 5, and fall into the lower sieve box 5 through the lower hopper 42, and the funnel-shaped lower hopper 42 can effectively gather and guide the screened raw coal, ensuring that the raw coal in the upper sieve box 5 always falls at the opening of the lower sieve box 5, and can avoid the raw coal spilling due to the left and right shaking of the sieve box 5.

[0034] Furthermore, both sides of the movable frame 4 are connected to pulleys 45 by short shaft rotation, and the pulleys 45 are slidably connected to the inside of the guide rail 2; when the movable frame 4 slides left and right, it will drive the pulleys 45 to slide inside the guide rail 2. Through the setting of the pulleys 45, the movable frame 4 slides more smoothly.

[0035] Furthermore, guide grooves 46 are provided on the front and rear sides of the movable frame 4, and guide blocks 51 are fixedly connected to both sides of the outer wall of the screen box 5, and the guide blocks 51 are slidably connected to the inside of the guide grooves 46 on the corresponding side; when the screen box 5 drives the guide blocks 51 to slide inside the guide grooves 46, the guide grooves 46 can indirectly limit the movement trajectory of the screen box 5 so that it can only slide along the direction of the guide grooves 46.

[0036] Furthermore, a slot 521 is provided on one side of the sieve box 5 and on both sides of the opening, and the baffle 6 is slidably connected inside the slot 521; during the process of screening the raw coal, the baffle 6 will block the outlet 52, so that a complete screening space is formed inside the sieve box 5. After the screening is completed, when the screened raw coal needs to be dumped and discharged, the baffle 6 will move to the inside of the slot 521, and the raw coal inside the sieve box 5 can be discharged through the outlet 52.

[0037] Furthermore, a limiting groove 522 is formed through one side of the slot 521, and a side wall of the baffle 6 is fixedly connected to a limiting block 61, which is slidably connected inside the limiting groove 522; during the opening and closing process of the baffle 6, the baffle 6 drives the limiting block 61 to slide inside the limiting groove 522, and the sliding path of the baffle 6 is indirectly controlled by limiting the position of the limiting block 61 by the limiting groove 522.

[0038] Furthermore, a guard plate 65 is fixedly connected to the side of the fixed seat 62 away from the hydraulic rod 3 64; the movable frame 4 and the screen box 5 are connected by a spring 43, and there is a certain sliding space between the two. The function of the guard plate 65 is that when the baffle 6 is opened, the guard plate 65 can block the connection gap between the movable frame 4 and the screen box 5 on both sides of the outlet 52 (that is, the sliding space between the two), so that the raw coal can slide directly through the outlet 52 to the through slot 44, and will not slide into the connection gap between the movable frame 4 and the screen box 5, ensuring the smooth progress of the screening process.

[0039] Working principle: First, pour the raw coal from the feed port 11 into the box body 1, and the raw coal will accumulate inside the topmost group of screen boxes 5. Then, the telescopic end of the hydraulic rod 23 is driven to reciprocate through the control box, and its telescopic end will drive the movable frame 4 to slide left and right inside the two groups of guide rails 2, thereby indirectly driving the screen box 5 to shake left and right. The spring 43 connected between the movable frame 4 and the screen box 5 will increase the shaking frequency of the screen box 5. At this time, the raw coal that is smaller than the diameter of the screen hole of the top screen box 5 will fall into the lower screen box 5 through the lower hopper 42. After passing through multiple groups of screen boxes 5, the raw coal that meets the particle size will eventually be discharged through the lower feed port 12.

[0040] After the screening is completed, the hydraulic rod 3 64 is controlled to operate, and the telescopic end of the hydraulic rod 3 64 drives the baffle 6 to slide in the direction of the slot 521 through the fixed seat 62, and the outlet 52 is opened. Then the telescopic end of the hydraulic rod 1 26 is extended through the control box, which will drive the rack 25 to move downward, thereby driving the gear 24 to rotate clockwise, and the gear 24 indirectly drives the screen box 5 to tilt through the shaft 22. As the screen box 5 gradually tilts, the raw coal that does not pass through the sieve hole inside the screen box 5 will slide into the receiving groove 7 through the outlet 52 and the through groove 44. In this process, the telescopic end of the hydraulic rod 2 3 can also be driven to reciprocate and telescope, so that it drives the screen box 5 to shake, thereby shaking out the raw coal remaining in the screen box 5. The dumped and discharged raw coal will be discharged through the discharge port 13 and the discharge hopper 8. A conveyor belt device can be installed under each group of discharge hoppers 8 to directly transport the raw coal of different particle sizes after screening in batches.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A raw coal screening device, characterized in that: The invention comprises a box body (1), a plurality of guide rails (2) and a plurality of screen boxes (5), wherein the upper surface of the box body (1) is connected with a material inlet (11), the lower surface of the box body (1) is connected with a material outlet (12), one side of the guide rail (2) is fixedly connected with a shaft rod (22), the end of the shaft rod (22) away from the guide rail (2) is rotatably connected with a bearing seat (23), and the bearing seat (23) is fixedly connected to the inner wall of the box body (1), the guide rail (2) and the bearing seat (23) form a rotating structure through the shaft rod (22), and the outer side of one group of the shaft rods (22) is fixedly connected with a gear (24), and the gear A rack (25) is meshed on one side of the guide rail (24), and a hydraulic rod (26) for adjusting the height of the rack (25) is fixedly connected to the upper surface of the rack (25). The two groups of guide rails (2) are connected via a fixed plate (21), and a hydraulic rod (3) is fixedly connected to one side of the fixed plate (21). The telescopic end of the hydraulic rod (3) is fixedly connected to a movable frame (4), and a material discharge trough (41) is provided through the inner bottom surface of the movable frame (4). Multiple groups of springs (43) are fixedly connected to the left and right sides of the movable frame (4), and a side of the movable frame (4) away from the hydraulic rod (3) is provided through A through groove (44) is provided, the sieve box (5) is slidably connected to the inside of the movable frame (4), and the sieve holes on the surface of the plurality of groups of the sieve boxes (5) are gradually reduced from top to bottom, and the end of the spring (43) away from the movable frame (4) is fixedly connected to the sieve box (5), an outlet (52) is provided through the side of the sieve box (5) away from the second hydraulic rod (3), the inside of the sieve box (5) and both sides close to the outlet (52) are fixedly connected with a guide seat (53), the outlet (52) is slidably connected to a baffle (6), one side of the baffle (6) is fixedly connected to a fixed seat (62), and the outer wall of the sieve box (5) is Support seats (63) are fixedly connected on both sides of the outlet (52), and hydraulic rod three (64) for adjusting the position of the baffle (6) is connected between the support seat (63) and the fixed seat (62), and the hydraulic rod one (26), hydraulic rod two (3) and hydraulic rod three (64) are all electrically connected to the control box. A plurality of discharge ports (13) are provided on a side of the box body (1) away from the fixed plate (21), and a receiving groove (7) is fixedly connected on one side of the discharge port (13) and located on the inner wall of the box body (1), and a discharge hopper (8) is fixedly connected on the other side of the discharge port (13) and located on the outer wall of the box body (1).

2. A raw coal screening device according to claim 1, characterized in that: A slider (251) is fixedly connected to the side of the rack (25) away from the gear (24), a slide rail (27) is fixedly connected to the inner wall of the box (1) and close to the rack (25), the slider (251) is slidably connected inside the slide rail (27), and an L-shaped bracket (271) for fixing a hydraulic rod (26) is fixedly connected to the upper surface of the slide rail (27).

3. A raw coal screening device according to claim 1, characterized in that: A lower hopper (42) is fixedly connected to the lower surface of the movable frame (4) and located below the lower chute (41), and the lower hopper (42) is a funnel structure.

4. A raw coal screening device according to claim 1, characterized in that: Both sides of the movable frame (4) are rotatably connected to pulleys (45) via short shafts, and the pulleys (45) are slidably connected inside the guide rail (2).

5. The raw coal screening device according to claim 1, characterized in that: The movable frame (4) is provided with guide grooves (46) on both the front and rear sides thereof, and the outer walls of the sieve box (5) are fixedly connected with guide blocks (51) on both sides thereof, and the guide blocks (51) are slidably connected to the inside of the guide groove (46) on the corresponding side.

6. A raw coal screening device according to claim 1, characterized in that: A slot (521) is provided on one side of the sieve box (5) and on both sides of the opening, and the baffle (6) is slidably connected inside the slot (521).

7. A raw coal screening device according to claim 6, characterized in that: A limiting groove (522) is formed through one side of the slot (521); a side wall of the baffle (6) is fixedly connected to a limiting block (61); and the limiting block (61) is slidably connected inside the limiting groove (522).

8. The raw coal screening device according to claim 1, characterized in that: A guard plate (65) is fixedly connected to a side of the fixing seat (62) away from the hydraulic rod three (64).

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