A screening device

Abstract

This invention relates to the field of coal screening technology and proposes a screening device, including a frame, a feed chute, and a discharge chute, all mounted on the frame with a space between them. A rotating frame is rotatably mounted within this space. A first screen and a second screen are both mounted on the rotating frame, arranged radially along the rotating frame. After the rotating frame rotates, the first and second screens alternately occupy the space, allowing material to pass sequentially through the feed chute and the first screen's discharge chute, or sequentially through the feed chute and the second screen's discharge chute. A washing assembly is movable and positioned to one side below the space to wash either the first or second screen. This technical solution solves the problems of low screen lifespan and low screening accuracy in existing screening devices, requiring shutdown for repairs upon damage.

Description

Technical Field

[0001] This invention relates to the field of coal screening technology, specifically to a screening device. Background Technology

[0002] Coal is the most important solid fuel, a type of combustible organic rock. It is formed by the gradual accumulation of thick layers of abundant vegetation that grew during specific geological eras, buried underwater or in silt, and undergoing natural coalification over long geological periods. Among the world's geological periods, the Carboniferous, Permian, Jurassic, and Tertiary strata contain the most coal and represent important coal-forming eras. Coal generally has a carbon content of 46%–97%, is brown to black, and has a dull to metallic luster. Based on the degree of coalification, coal can be classified into four categories: peat, lignite, bituminous coal, and anthracite. Coal production requires screening. Existing screening devices have short screen lifespans and low screening accuracy; once damaged, the machine must be shut down. Summary of the Invention

[0003] This invention proposes a screening device that solves the technical problems of low screen life and low screening accuracy in related technologies, and the need to stop the machine once damaged.

[0004] The technical solution of the present invention is as follows:

[0005] A screening device, comprising

[0006] frame,

[0007] The machine includes a feed chute and a discharge chute, both mounted on the frame, with a space between them.

[0008] A rotating frame, which is rotatably mounted within the interval space.

[0009] A first screen and a second screen are both mounted on the rotating frame. The first and second screens are arranged radially along the rotating frame. When the rotating frame rotates, the first and second screens alternately occupy the space between them, allowing material to pass sequentially through the feed chute and the discharge chute of the first screen, or sequentially through the feed chute and the discharge chute of the second screen.

[0010] A rinsing assembly is movably disposed on one side below the interval space for rinsing the first screen or the second screen.

[0011] As a further technical solution, the rotating frame has a mounting groove, and both the first screen component and the second screen component include...

[0012] A screening disc, which is slidably disposed in the mounting groove.

[0013] An upper spring and a lower spring are provided, with one end of the upper spring and one end of the lower spring acting on opposite sides of the screening disc, and the other ends of the upper spring and the lower spring acting on the rotating frame.

[0014] A vibrating motor, mounted on the frame, has a vibrating end that acts on the screening disc.

[0015] A pushing member is disposed on the rotating frame and is used to push the screening disc to move and make way so that the screening disc can rotate to the vibrating end side. After the screening disc rotates to the vibrating end side, the pushing member cancels the pushing of the screening disc so that the screening disc abuts against the vibrating end.

[0016] As a further technical solution, the screening disc has a material guiding section, the material guiding section has a first discharge port, and the first discharge port is connected to the discharge trough.

[0017] A collection tray is disposed on the screening tray and has a second discharge port.

[0018] As a further technical solution, a feeding component is also included, the feeding component comprising:

[0019] The housing has an inlet and an outlet, with a second outlet leading to the inlet and an outlet leading to the feed trough.

[0020] A conveying auger, rotatably mounted on the housing, has a spiral guide plate with crushing ridges on the spiral guide plate.

[0021] A rotation drive unit drives the conveying auger to rotate.

[0022] As a further technical solution, a roller screen is also included, which is disposed in front of the feed trough, and the roller screen includes...

[0023] A screening rack, which is mounted on the machine frame.

[0024] A screening roller is rotatably mounted on the screening frame. Several screening rollers are arranged sequentially and rotate in the same direction.

[0025] A crushing roller is rotatably mounted on the screening frame and located behind the screening roller. The crushing roller rotates in the opposite direction to the screening roller, and a crushing space is formed between the crushing roller and the screening roller.

[0026] As a further technical solution, the outlet leads to the roller screen, and the feed trough is located below the roller screen.

[0027] As a further technical solution, the blow-washing assembly includes

[0028] A first movable cover and a second movable cover are movably mounted on the frame, respectively located on opposite sides of the lower part of the rotating frame, and are used to cover the screening disc after being moved.

[0029] A high-pressure nozzle is disposed inside the first movable cover and the second movable cover, and there are several high-pressure nozzles arranged in sequence.

[0030] As a further technical solution, the rotating frame has a sliding part, the frame has a sliding groove, and the sliding part is slidably disposed in the sliding groove.

[0031] As a further technical solution, the screening rollers are arranged in sequence and include a rotating shaft and a screening turntable. The screening turntable is disposed on the rotating shaft and the rotating shaft and the screening turntable are coaxially disposed.

[0032] As a further technical solution, the vibrating end has a slot, and the screening disc has an insertion part. After the screening disc located on one side of the vibrating motor slides, the insertion part slides into or out of the slot.

[0033] The working principle and beneficial effects of this invention are as follows:

[0034] This invention incorporates a feed chute for conveying coal materials and a first and second screen for screening the coal materials. Both screens are mounted on a rotating frame, allowing for switching between their respective workstations. A cleaning assembly is included for cleaning either the first or second screen. The rotating frame enables the switching of workstations between the two screens, with one station serving as a screening station and the other as a cleaning station. Compared to existing screening devices, the added cleaning station allows for the periodic cleaning of either the first or second screen, removing any debris stuck in the mesh of the screening device. The coal is flushed down, preventing it from sticking to the screen for extended periods and affecting the feeding efficiency of the first and second screens. The dual-station setup allows the first or second screen in the cleaning station to be moved to the screening station by a rotating component if either screen malfunctions or is damaged. This ensures normal equipment operation, maintains the screening rhythm, avoids production delays, and improves screening efficiency. Compared to existing technologies, regular screen cleaning reduces the enlargement of the screen mesh caused by coal sticking to it for extended periods, ensuring screening accuracy and extending the service life of both the first and second screens. Attached Figure Description

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is another schematic diagram of the structure of the present invention;

[0038] Figure 3 This is a schematic diagram of the shell and conveying auger structure in this invention;

[0039] In the diagram: Frame-1, Slide-101, Feed chute-2, Discharge chute-3, Rotating frame-4, Mounting slot-401, Screening disc-402, Upper spring-403, Lower spring-404, Vibrating motor-405, Pushing component-406, Guide part-407, First discharge port-409, Collecting disc-408, Sliding part-410, Insert part-411, Slot-412, Vibrating end-413, First screen component-5, Second screen component-6, Feeding component-7, Housing-701, Outlet-702, Conveying auger-703, Rotating drive component-704, Roller screen-8, Screening frame-9, Screening roller-10, Rotating shaft-1001, Screening turntable-1002, Crushing roller-11, First moving cover-1301, Second moving cover-1302, High-pressure nozzle-1303. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figures 1-3 As shown, this embodiment proposes a screening device, including a frame 1, a feed chute 2 and a discharge chute 3. The feed chute 2 and the discharge chute 3 are both mounted on the frame 1, and there is a space between the feed chute 2 and the discharge chute 3. A rotating frame 4 is rotatably mounted within the space. A first screen 5 and a second screen 6 are both mounted on the rotating frame 4. The first screen 5 and the second screen 6 are arranged radially along the rotating frame 4. After the rotating frame 4 rotates, the first screen 5 and the second screen 6 are alternately located in the space, so that the material passes through the feed chute 2 and the discharge chute 3 of the first screen 5 in sequence or through the feed chute 2 and the discharge chute 3 of the second screen 6 in sequence. A washing assembly is movable and mounted on one side below the space for washing the first screen 5 or the second screen 6.

[0042] This embodiment features a feed chute 2 for conveying coal materials and a first screen 5 and a second screen 6 for screening the coal materials. Both the first screen 5 and the second screen 6 are mounted on a rotating frame 4. The rotation of the rotating frame 4 allows for switching between the positions of the first screen 5 and the second screen 6. A cleaning assembly is included for cleaning either the first screen 5 or the second screen 6. The rotating frame 4 allows for switching between the two screens, with one position being the screening position and the other the cleaning position. Compared to existing screening devices, the added cleaning position allows for the periodic cleaning of either the first screen 5 or the second screen 6, preventing materials from getting stuck in the screening process. The coal on the screen is flushed off, preventing it from sticking for too long and affecting the feeding efficiency of the first screen 5 and the second screen 6. The dual-station setup allows the first screen 5 or the second screen 6 in the cleaning station to be moved back to the screening station by rotating components if either malfunctions or is damaged. This ensures normal equipment operation, maintains the screening rhythm, avoids production delays, and improves screening efficiency. Compared to existing technologies, regular screen cleaning reduces the enlargement of the screen mesh caused by coal sticking for extended periods, ensuring screening accuracy and extending the service life of the first screen 5 and the second screen 6.

[0043] Furthermore, the rotating frame 4 has a mounting groove 401. The first screen component 5 and the second screen component 6 both include a screening disc 402, which is slidably disposed in the mounting groove 401. An upper spring 403 and a lower spring 404 are provided, with one end of the upper spring 403 and one end of the lower spring 404 acting on both sides of the screening disc 402, and the other ends of the upper spring 403 and the lower spring 404 acting on the rotating frame 4. A vibration motor 405 is provided on the frame 1 and has a vibration end 413, which acts on the screening disc 402. A pusher 406 is provided on the rotating frame 4 and is used to push the screening disc 402 to move and make room so that the screening disc 402 can rotate to the side of the vibration end 413. After the screening disc 402 rotates to the side of the vibration end 413, the pusher 406 stops pushing the screening disc 402 so that the screening disc 402 abuts against the vibration end 413.

[0044] In this embodiment, both the first screen component 5 and the second screen component 6 are designed with a screening disc 402 for screening smaller pieces of coal. A vibration motor 405 is designed to drive the screening disc 402 to vibrate and achieve material screening. The screening disc 402 is installed in the mounting groove 401. In order to avoid interference between the screening disc 402 and the frame 1 when it rotates, a pusher 406 is designed to lift the screening disc 402 when the rotating frame 4 rotates, so as to ensure that the screening disc 402 will not collide with the frame 1. Its structure is simple and easy to maintain.

[0045] Furthermore, the screening disc 402 has a material guiding part 407, the material guiding part 407 has a first discharge port 409, the first discharge port 409 is connected to the discharge trough 3, and a collection disc 408 is disposed on the screening disc 402, the collection disc 408 has a second discharge port.

[0046] In this embodiment, a first discharge port 409 is designed for feeding the first screen 5 and the second screen 6, and a collection tray 408 is designed for collecting large pieces of material after screening by the first screen 5 and the second screen 6 and discharging them through the second discharge port. Its structure is simple and easy to maintain.

[0047] Furthermore, it also includes a feeding component 7, which includes a housing 701, the housing 701 having an inlet and an outlet 702, a second discharge port leading to the inlet, and an outlet 702 leading to the feed trough 2. A conveying auger 703 is rotatably mounted on the housing 701 and has a spiral guide plate with crushing protrusions on the spiral guide plate. A rotation drive 704 drives the conveying auger 703 to rotate.

[0048] In this embodiment, in order to ensure that large pieces of material after screening by the screen will not affect the normal operation of the screening device, a feeding component 7 is also designed for material transfer. Under the action of the conveying auger 703, large pieces of material can not only be conveyed, but also crushed. Its structure is simple and easy to maintain.

[0049] Furthermore, it also includes a roller screen 8, which is located in front of the feed trough 2. The roller screen 8 includes a screening frame 9, which is mounted on the frame 1. Screening rollers 10 are rotatably mounted on the screening frame 9. Several screening rollers 10 are arranged sequentially and rotate in the same direction. Crushing rollers 11 are rotatably mounted on the screening frame 9 and located behind the screening rollers 10. The crushing rollers 11 rotate in the opposite direction to the screening rollers 10, and a crushing space is formed between the crushing rollers 11 and the screening rollers 10.

[0050] In this embodiment, the screening roller 10 and the crushing roller 11 are arranged adjacent to each other, and their rotation drive 704 can be the same rotation drive 704, which effectively saves the energy consumption of the drive. The adjacent arrangement of the screening roller 10 and the crushing roller 11 can directly crush large pieces of material. The large pieces of material fed by the feeding component 7 fall directly into the crushing space from the outlet 702. Compared with the existing technology of adding a new crushing device, this solution saves space and is easy to maintain.

[0051] Furthermore, outlet 702 leads to roller screen 8, and feed chute 2 is located below roller screen 8. In this embodiment, to facilitate the feeding of the first screen 5 and the second screen 6, feed chute 2 is located below roller screen 8, which has a simple structure and is easy to maintain.

[0052] Furthermore, the rinsing assembly includes a first movable cover 1301 and a second movable cover 1302, which are relatively movable on the frame 1. The first movable cover 1301 and the second movable cover 1302 are located on both sides of the lower part of the rotating frame 4, and are used to cover the screening disc 402 after being moved. The high-pressure nozzle 1302 is disposed inside the first movable cover 1301 and the second movable cover 1302, and there are several high-pressure nozzles 1302 arranged in sequence.

[0053] In this embodiment, the rinsing assembly is designed as two parts: a first movable cover 1301 and a second movable cover 1302. Both the first movable cover 1301 and the second movable cover 1302 are equipped with high-pressure nozzles 1302. When the screen needs to be cleaned, the first movable cover 1301 and the second movable cover 1302 move to cover the first screen 5 or the second screen 6, and then the high-pressure nozzles 1302 clean it. The arrangement of the first movable cover 1301 and the second movable cover 1302 ensures that the waste liquid generated from cleaning the first screen 5 and the second screen 6 will not affect normal production, and facilitates the recycling of waste liquid. Its structure is simple and easy to maintain.

[0054] Furthermore, the rotating frame 4 has a sliding part 410, and the frame 1 has a sliding groove 101. The sliding part 410 is slidably disposed in the sliding groove 101. In this embodiment, in order to ensure the structural stability of the rotating frame 4, the sliding part 410 is also designed. The sliding part 410 is inserted into the sliding groove 101 and slides, which can not only ensure the rotation trajectory of the rotating disk, but also ensure the structural stability of the rotating frame 4, thereby reducing the failure rate of the equipment.

[0055] Furthermore, the screening rollers 10 are arranged in sequence and include a rotating shaft 1001 and a screening turntable 1002. The screening turntable 1002 is disposed on the rotating shaft 1001, and the rotating shaft 1001 and the screening turntable 1002 are coaxially disposed.

[0056] In this embodiment, in order to ensure the screening efficiency of the roller screen 8, the screening roller 10 is designed as two parts: a rotating shaft 1001 and a screening turntable 1002. When the coal moves from one side of the screening device to the other side, the coal will be initially crushed under the action of the screening turntable 1002, and small pieces of material will fall out of the screen. When it is conveyed to the crushing space, the coal material is crushed and falls onto the screening screen. Its structure is simple, the screening efficiency is high, and it is easy to maintain.

[0057] Furthermore, the vibrating end 413 has a slot 412, and the screening disc 402 has an insertion part 411. After the screening disc 402 located on one side of the vibrating motor 405 slides, the insertion part 411 slides into or out of the slot 412. In this embodiment, in order to ensure the vibration effect of the screening disc 402, an insertion part 411 connected to the slot 412 is also designed. When the insertion part 411 is connected to the slot 412, it can ensure that the vibration force of the vibrating motor 405 is transmitted to the screen part with maximum effect.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screening device, characterized in that, The utility model relates to a kind of screening machines, including Machine frame (1), Feed slot (2) and discharge slot (3), the feed slot (2) and the discharge slot (3) are both provided on the machine frame (1), and the feed slot (2) and the discharge slot (3) have interval space, Rotary frame (4) is rotationally arranged in the interval space, First screen element (5) and second screen element (6), the first screen element (5) and the second screen element (6) are both arranged on the rotary frame (4), and the arrangement direction of the first screen element (5) and the second screen element (6) is along the radial direction of the rotary frame (4), after the rotary frame (4) rotates, the first screen element (5) and the second screen element (6) are alternately located in the interval space, so that material passes through the feed slot (2), the first screen element (5) the discharge slot (3) in turn or passes through the feed slot (2), the second screen element (6) the discharge slot (3) in turn, Blow washing assembly is movably arranged at one side below the interval space, for blowing and washing the first screen element (5) or the second screen element (6), Rotary frame (4) has mounting groove (401), and the first screen element (5) and the second screen element (6) both include Screening disc (402) is slidably arranged in the mounting groove (401), Upper spring (403) and lower spring (404), one end of the upper spring (403) and one end of the lower spring (404) are respectively applied to both sides of the screening disc (402), and the other end of the upper spring (403) and the other end of the lower spring (404) are applied to the rotary frame (4), Vibration motor (405) is arranged on the machine frame (1), and has vibration end (413), and the vibration end (413) is used to act on the screening disc (402), in screening state, the first screen element (5) and the second screen element (6) are arranged up and down, and vibration motor (405) is located below the first screen element (5) or the second screen element (6) above, Pushing element (406) is arranged on the rotary frame (4), for pushing the screening disc (402) to move and make room so that the screening disc (402) can rotate to one side of the vibration end (413), and after the screening disc (402) rotates to one side of the vibration end (413), the pushing element (406) cancels the pushing of the screening disc (402) so that the screening disc (402) is inserted with the vibration end (413).

2. A screening device according to claim 1, characterized in that The screening disc (402) has material guide part (407), and the material guide part (407) has first discharge port (409), and the first discharge port (409) is communicated with the discharge slot (3), Material collecting disc (408) is arranged on the screening disc (402), and the material collecting disc (408) has second discharge port.

3. A screening apparatus according to claim 2, wherein, It also includes feeding element (7), and the feeding element (7) includes A shell (701) having an inlet and an outlet (702), the second discharge port leading to the inlet, the outlet (702) leading to the feeding groove (2), A conveying auger (703) rotationally arranged in the shell (701) and having a spiral guide plate with broken ridges, A rotation driving member (704) driving the conveying auger (703) to rotate.

4. A screening apparatus according to claim 3, wherein, Further comprising a roller screen (8) arranged in front of the feeding groove (2), the roller screen (8) comprising A screening frame (9) arranged on the rack (1), Screening rollers (10) rotationally arranged on the screening frame (9), the screening rollers (10) being sequentially arranged and rotating in the same direction, Broken rollers (11) rotationally arranged on the screening frame (9) and located behind the screening rollers (10), the broken rollers (11) rotating in the opposite direction of the screening rollers (10), and the broken rollers (11) and the screening rollers (10) forming a broken space therebetween.

5. A screening device according to claim 4, characterised in that The outlet (702) leads to the roller screen (8), and the feeding groove (2) is located below the roller screen (8).

6. A screening device according to claim 1, characterized in that The purging assembly comprises First and second moving covers (1301) and (1302) oppositely arranged on the rack (1), the first and second moving covers (1301) and (1302) being respectively located on both sides of the lower part of the rotating frame (4) and used for covering the screening disc (402) after moving, High-pressure nozzles (1303) arranged in the first and second moving covers (1301) and (1302), the high-pressure nozzles (1303) being sequentially arranged.

7. A screening device according to claim 1, characterized in that The rotating frame (4) has a sliding part (410), and the rack (1) has a sliding groove (101), the sliding part (410) being slidingly arranged in the sliding groove (101).

8. A screening device according to claim 4, wherein The screening rollers (10) are sequentially arranged and comprise shafts (1001) and screening rotary discs (1002), the screening rotary discs (1002) being arranged on the shafts (1001), and the shafts (1001) and the screening rotary discs (1002) being coaxially arranged.

9. A screening device according to claim 1, characterized in that The vibrating end (413) has a slot (412), and the screening disc (402) has an insertion part (411), the insertion part (411) sliding into or out of the slot (412) after the screening disc (402) on the vibrating motor side is slid.

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