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CN-121988523-A - Efficient anti-blocking vibration screening device for coal and screening method thereof

CN121988523ACN 121988523 ACN121988523 ACN 121988523ACN-121988523-A

Abstract

The invention discloses a high-efficiency anti-blocking vibration screening device for coal and a screening method thereof, which belong to the technical field of screening equipment and comprise a frame and a screening box, wherein four top ends of the frame are fixedly connected with the outer wall of the screening box through elastic supporting legs, the elastic supporting legs comprise supporting rods fixed at the top of the frame and supporting seats fixed on the outer wall of the bottom of the screening box, the supporting seats can elastically stretch and retract up and down and left and right along the supporting rods, screening plates are fixedly arranged in the screening box, the front surface and the back surface of the frame are fixedly connected with supporting shells, a cleaning assembly is arranged between the supporting shells, the cleaning assembly comprises supporting tubes arranged above the screening box, cleaning brush bars and cleaning spray pipes fixedly arranged on the side walls of the supporting tubes, and the cleaning assembly can switch modes of the cleaning brush bars and the cleaning spray pipes.

Inventors

  • YANG XIAOQUAN
  • LIU YUEMU
  • Wen Jiangmin

Assignees

  • 国能榆林能源有限责任公司

Dates

Publication Date
20260508
Application Date
20260401

Claims (8)

  1. 1. The utility model provides a high-efficient anti-blocking vibration screening plant for coal, includes frame (1) and screening case (2), its characterized in that through elastic leg (3) fixed connection between four tops of frame (1) and the outer wall of screening case (2), elastic leg (3) are including branch (303) that are fixed in frame (1) top, support (305) that are fixed in screening case (2) bottom outer wall, elastic telescopic movement of support (305) up-and-down and left and right directions can be carried out along branch (303), vibrating motor (204) are fixed to the bottom of screening case (2), screening plate (203) are fixed to the inside of screening case (2), front and the equal fixedly connected with supporting shell (101) in back of frame (1), install the clearance subassembly between supporting shell (101), the clearance subassembly is including setting up stay tube (4) in screening case (2) top, clearance brush strip (401) and clearance spray tube (402) of fixed mounting in stay tube (4) lateral wall, the clearance subassembly can carry out the switching of clearance brush strip (401) and clearance spray tube (402).
  2. 2. The efficient anti-blocking vibration screening device for coal, as set forth in claim 1, is characterized in that the upper end of the supporting rod (303) penetrates through the top of the supporting seat (305) in a sliding mode and is fixedly connected with the baffle (304), a transverse sliding hole (306) is formed in the supporting seat (305), the supporting rod (303) is located in the middle of the transverse sliding hole (306), a rubber supporting cylinder (301) is fixedly connected between the bottom of the supporting seat (305) and the top of the frame (1), a vertical spring (302) is fixed in the rubber supporting cylinder (301), and the rubber supporting cylinder (301) and the vertical spring (302) are both sleeved on the supporting rod (303).
  3. 3. The efficient anti-blocking vibration screening device for coal, as set forth in claim 2, wherein two ends of the horizontal sliding hole (306) are fixedly connected with horizontal springs (307), the ends of the horizontal springs (307) are fixedly connected with guide plates (308), the supporting rods (303) are in sliding fit between the guide plates (308), guide grooves (309) are formed in two sides of the horizontal sliding hole (306), and two ends of the guide plates (308) extend into the corresponding guide grooves (309) and are in sliding connection with the corresponding guide grooves.
  4. 4. The efficient anti-blocking vibration screening device for coal, as set forth in claim 1, is characterized in that the right ends of the screening boxes (2) corresponding to the upper and lower sides of the screening plate (203) are respectively provided with a discharging door plate (205) in a hinged mode, the two discharging door plates (205) are used for discharging, and the left end of the screening box (2) is fixedly connected with a feed hopper (202) through a supporting plate (201).
  5. 5. The efficient anti-blocking vibration screening device for coal is characterized in that an ear plate (501) is fixedly connected to the inner side of the supporting shell (101), a screw rod (5) is connected between the ear plates (501) in the front through a bearing, a guide rod (503) is fixedly connected between the ear plates (501) in the rear, a stepping motor (502) is fixedly arranged on the outer wall of one ear plate (501), the output end of the stepping motor (502) is fixedly connected with the screw rod (5), adjusting sliding seats (403) are fixedly connected to the two ends of the bottom of the supporting tube (4), one adjusting sliding seat (403) is in threaded sleeve joint with the screw rod (5), and the other adjusting sliding seat (403) is in sliding sleeve joint with the guide rod (503).
  6. 6. The efficient anti-blocking vibration screening device for coal according to claim 5, wherein a rotating motor (404) is fixedly arranged on the outer wall of the adjusting sliding seat (403), the output end of the rotating motor (404) is fixedly connected with the rear end of the supporting tube (4), the cleaning brush strips (401) are made of elastic plastic materials, when the cleaning brush strips (401) are rotated to clean the screening plate (203), the cleaning brush strips (401) are in sliding connection with the screening plate (203), and the cleaning brush strips (401) and the cleaning spray tubes (402) are uniformly distributed along the supporting tube (4) in a linear array.
  7. 7. The efficient anti-blocking vibration screening device for coal, as claimed in claim 1, wherein the inner wall of the front end opening of the supporting tube (4) is connected with a swivel (405) through a bearing, the middle part of the swivel (405) is fixedly connected with a blowing hose (406), the bottom of the frame (1) is fixedly provided with a blowing pump (407), and the output end of the blowing pump (407) is fixedly connected with the end part of the blowing hose (406).
  8. 8. A screening method of a vibration screening device for high-efficiency anti-blocking coal, characterized in that the vibration screening device for high-efficiency anti-blocking coal according to any one of claims 1 to 7 is applied, comprising the following steps: S1, pouring raw coal into a screening box (2) and falling on an inclined screening plate (203), starting a vibrating motor (204) to drive the screening box (2) to vibrate, driving the screening plate (203) to vibrate in multiple directions up and down and left and right through an elastic supporting leg (3), enabling the raw coal to slide downwards under the vibration effect, enabling fine coal to fall through screening holes, and enabling coarse coal to slide towards the bottom end of the screening plate (203); S2, when the screening plate (203) needs to be cleaned, the cleaning assembly moves along the length direction of the screening plate (203) to drive the cleaning spray pipe (402) to perform high-pressure blowing cleaning on the screening plate (203), and then the cleaning brush strip (401) is switched to scrape the screening plate (203) for cleaning, so that efficient anti-blocking is realized.

Description

Efficient anti-blocking vibration screening device for coal and screening method thereof Technical Field The invention belongs to the technical field of screening equipment, and particularly relates to a high-efficiency anti-blocking vibration screening device for coal and a screening method thereof. Background In the coal exploitation and processing process, the vibration screening device is core equipment for realizing classification, impurity removal and quality improvement of raw coal, and the screening efficiency and the operation stability of the vibration screening device directly influence the overall efficiency and the product quality of coal processing. At present, the existing vibration screening device for coal generally has the problem of hole blocking, especially when treating raw coal with high water content and high mud content, fine coal is easy to be adsorbed on the inner wall of a sieve hole, or is blocked in the sieve hole after caking, so that the sieve hole is blocked, and the screening efficiency is greatly reduced. For this reason, chinese patent with patent number CN218872812U discloses a high-efficient coal preparation device of anti-blocking vibrating screen, which comprises a supporting bar, the bracing piece is provided with two altogether, and the equal fixedly connected with first supporting leg in two bracing piece upper end left parts, two equal fixedly connected with second supporting leg in bracing piece upper end right part, two equal fixedly connected with strutting arrangement in first supporting leg upper end and two second supporting leg upper ends, and common fixedly connected with screening case between four strutting arrangement, screening incasement left part fixedly connected with screening board, screening case lower extreme middle part fixedly connected with vibrating motor, screening case lower extreme left part symmetry fixedly connected with two discharge gates, screening case front end upper portion and rear end upper portion are fixedly connected with displacement device jointly. Through setting up jet mechanism to can carry out high-pressure jet, avoid screening board to block up, thereby can high-efficient screening coal dressing to raw coal. However, the device can only realize the vibration of the screening box in the vertical direction through the elastic supporting device, the vibration direction is single, so that raw coal is not uniformly distributed on the screening plate and the screening speed is easy to reduce, and the device can only perform blowing cleaning, so that high-pressure air flow is difficult to thoroughly blow off coal blocks and mud balls which are firmly stuck in the screen holes, the cleaning effect is limited, the anti-blocking effect is weak, and the screening efficiency is influenced. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides the efficient anti-blocking vibration screening device for coal and the screening method thereof, which have the advantages of multidirectional vibration, switchable cleaning modes, good anti-blocking effect and high screening efficiency, and solve the problems of single vibration direction, limited cleaning effect, weak anti-blocking capability and low screening efficiency in the prior art. The invention discloses a high-efficiency anti-blocking vibration screening device for coal, which comprises a frame and a screening box, wherein four top ends of the frame are fixedly connected with the outer wall of the screening box through elastic supporting legs, each elastic supporting leg comprises a supporting rod fixed at the top of the frame and a support fixed on the outer wall of the bottom of the screening box, the support can elastically stretch and retract along the supporting rod in the up-down and left-right directions, a vibrating motor is fixedly arranged at the bottom of the screening box, a screening plate is fixedly arranged in the screening box, supporting shells are fixedly connected to the front surface and the back surface of the frame, a cleaning assembly is arranged between the supporting shells, each cleaning assembly comprises a supporting tube erected above the screening box, a cleaning brush bar fixedly arranged on the side wall of the supporting tube and a cleaning spray tube, and the cleaning assembly can switch modes of the cleaning brush bar and the cleaning spray tube. As the preferable mode of the invention, the upper end of the supporting rod penetrates through the top of the supporting seat in a sliding way and is fixedly connected with the baffle, the supporting seat is provided with a transverse sliding hole, the supporting rod is positioned in the middle of the transverse sliding hole, a rubber supporting cylinder is fixedly connected between the bottom of the supporting seat and the top of the frame, a vertical spring is fixedly arranged in the rubber supporting cylinder, and the rubber supporting cylinder and the vertic