Fine screening classifier
By using star discharge valves and guide plates in the fine screening grader to evenly distribute the materials, and combined with the airflow purge function of the cleaning mechanism, the problems of fine screening holes and uneven distribution of materials are solved, which significantly improves the screening efficiency and processing capacity and reduces energy consumption.
Patent Information
- Application Number
- CN202421911746.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-08
AI Technical Summary
When the existing fine screening grader controls the final material yield at around 70%, the screening and grading efficiency is low, and there are too many qualified products on the screen, resulting in high energy consumption and low efficiency. The main reason is that the material distribution is uneven and the long-term use of the screen surface leads to clogging of the fine screen holes.
A fine screening grader is designed, using a star-shaped discharge valve and a guide plate to evenly distribute the materials, and through a cleaning mechanism, the blocked screen hole is purged and broken through the airflow to improve screening efficiency.
By evenly distributing materials and cleaning mechanisms, the screening efficiency of the fine screening grader is improved, energy consumption is reduced, material residue is reduced, and overall processing capacity is improved.
Smart Images
Figure CN222970307U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of classification and screening machinery, and particularly relates to a fine screen classifier. Background Art
[0002] A fine screen classifier is a classification device used in the ore dressing production industry. It realizes mineral classification through the mechanical vibration of a screen mesh, is suitable for processing relatively fine-grained materials, has the characteristics of high screening accuracy and strong processing capacity, and is often used in high-precision screening occasions. However, for the fine screen classifier used in the existing limestone ore production, when the yield of the final material is controlled at about 70%, its screening and classification efficiency is only about 30%. There are too many qualified products remaining on the screen, and an additional recycling mechanism needs to be added to rescreen these qualified products, ultimately resulting in problems such as high energy consumption and low efficiency. The main reasons are that the materials entering the fine screen classifier are unevenly distributed in the distribution box, and the fine screen holes are blocked due to long-term use of the screen surface. Therefore, it is necessary to design a fine screen classifier that can prevent the fine screen holes from being blocked and evenly distribute the materials. Content of the Utility Model
[0003] In view of the above technical problems, the utility model provides a fine screen classifier that can prevent the fine screen holes from being blocked and evenly distribute the materials.
[0004] To solve the above technical problems, the technical solution of the utility model is: a fine screen classifier, including a screening box, a coarse screen vibrating screen, and a fine screen vibrating screen. The top of the screening box is fixedly connected with a feed hopper, and the bottom is fixedly connected with a fine material outlet. The coarse screen vibrating screen and the fine screen vibrating screen are sequentially installed inside the screening box from top to bottom. The coarse screen vibrating screen and the fine screen vibrating screen are both inclined, and the inclined downward ends extend outside the screening box. A star discharge valve is installed in the feed hopper. A guide plate is inclined and arranged above the coarse screen vibrating screen below the star discharge valve. The inclined direction of the guide plate is opposite to the inclined direction of the coarse screen vibrating screen. Both sides of the guide plate are fixedly connected with the inner wall of the screening box. A cleaning mechanism is arranged below the fine screen vibrating screen. The cleaning mechanism includes a nozzle, a telescopic cylinder, and an air supply pipe. The telescopic cylinder is fixedly connected with the inner wall of the screening box. The output end of the telescopic cylinder is fixedly connected with one side of the air supply pipe. A number of upwardly arranged nozzles are installed on the air supply pipe. The air inlet interface of the air supply pipe is connected to a gas source through a hose.
[0005] Further, a coarse material receiving hopper is arranged below the inclined downward end of the coarse screen vibrating screen, and a fine material receiving hopper is arranged below the inclined downward end of the fine screen vibrating screen. One side of the coarse material receiving hopper and the fine material receiving hopper is fixedly connected with the outside of the screening box.
[0006] Further, a dust suction pipe is fixedly connected to the top of the screening box. An induced draft fan is installed on the dust suction pipe, and a filter screen is arranged at the air inlet of the dust suction pipe.
[0007] Further, a coil winder is installed outside the screening box. The flexible hose is wound around the coil winder, and the other end of the flexible hose is communicated with a gas source.
[0008] Further, four support legs are fixedly connected to the outer side of the bottom of the screening box.
[0009] The utility model has the following advantages compared with the prior art:
[0010] 1. By arranging a star-shaped discharge valve and a guide plate in the utility model, the star-shaped discharge valve can evenly convey materials into the screening box. At the same time, the guide plate can guide the materials falling on it to the inclined upward side of the coarse screening vibrating screen, increasing the residence time of the materials on the screen plate of the coarse screening vibrating screen and improving the screening efficiency. By arranging a cleaning mechanism, an operator can start the cleaning mechanism to clean the screen plate of the fine screening vibrating screen, and break the blocked screen holes through air flow blowing, further improving the screening efficiency.
[0011] 2. By arranging an induced draft fan to continuously suck the air in the screening box in the utility model, a negative pressure environment is formed in the screening box, preventing the dust in the screening box from escaping and avoiding environmental pollution. By arranging a coil winder to store the flexible hose, the knotting between the flexible hoses is prevented from affecting the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic structural view of the utility model.
[0013] Figure 2 is a right side view of the utility model.
[0014] Figure 3 is a schematic structural view of the cleaning mechanism of the utility model.
[0015] Figure 4 is a right side view of the cleaning mechanism of the utility model.
[0016] In the figure: 1. Screening box, 2. Coarse screening vibrating screen, 3. Fine screening vibrating screen, 4. Feed hopper, 5. Fine material outlet, 6. Star-shaped discharge valve, 7. Guide plate, 8. Cleaning mechanism, 81. Nozzle, 82. Telescopic cylinder, 83. Air supply pipe, 9. Flexible hose, 10. Coil winder, 11. Coarse material receiving hopper, 12. Fine material receiving hopper, 13. Dust suction pipe, 14. Induced draft fan, 15. Support leg. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following will further illustrate the utility model in conjunction with the drawings.
[0018] As Figures 1 to 4 shown, a fine sieve classifier includes a screening box 1, a coarse sieve vibrating screen 2, and a fine sieve vibrating screen 3. A feed hopper 4 is fixedly connected to the top of the screening box 1. The bottom of the screening box 1 is funnel-shaped and fixedly connected with a fine material outlet 5. The coarse sieve vibrating screen 2 and the fine sieve vibrating screen 3 are sequentially installed inside the screening box 1 from top to bottom. Springs are fixedly connected to the inner wall of the screening box 1. Both ends of the coarse sieve vibrating screen 2 and the fine sieve vibrating screen 3 are movably connected to the inner wall of the screening box 1 through springs. Vibration motors are fixedly connected to the lower sides of the coarse sieve vibrating screen 2 and the fine sieve vibrating screen 3. Both the coarse sieve vibrating screen 2 and the fine sieve vibrating screen 3 are inclined, and the inclined downward ends extend outside the screening box 1. A star-shaped discharge valve 6 is installed in the feed hopper 4. The star-shaped discharge valve 6 is an electric star-shaped discharge valve. A deflector plate 7 is inclined below the star-shaped discharge valve 6 and above the coarse sieve vibrating screen 2. The inclination direction of the deflector plate 7 is opposite to the inclination direction of the coarse sieve vibrating screen 2. Both sides of the deflector plate 7 are fixedly connected to the inner wall of the screening box 1. The deflector plate 7 can guide the materials falling on it to the upward inclined side of the coarse sieve vibrating screen 2, increasing the residence time of the materials on the sieve plate of the coarse sieve vibrating screen 2. A cleaning mechanism 8 is arranged below the fine sieve vibrating screen 3. The cleaning mechanism includes a nozzle 81, a telescopic cylinder 82, and an air supply pipe 83. The telescopic cylinder 82 is fixedly connected to the inner wall of the screening box 1. The output end of the telescopic cylinder 82 is fixedly connected to one side of the air supply pipe 83. The movement direction of the output end of the telescopic cylinder 82 is parallel to the sieve plate of the fine sieve vibrating screen 3. A plurality of upwardly arranged nozzles 81 are installed on the air supply pipe 83. The air inlet interface of the air supply pipe 83 is connected to a gas source through a hose 9. In this embodiment, the telescopic cylinder 82 is an electric telescopic cylinder, and the gas source is a gas storage tank connected to an air compressor.
[0019] To facilitate the separate transportation of the screened coarse materials and fine materials, a coarse material receiving hopper 11 is arranged below the inclined downward end of the coarse sieve vibrating screen 2, and a fine material receiving hopper 12 is arranged below the inclined downward end of the fine sieve vibrating screen 3. One side of each of the coarse material receiving hopper 11 and the fine material receiving hopper 12 is fixedly connected to the outside of the screening box 1.
[0020] To prevent the dust inside the screening box 1 from scattering outside the screening box 1 through each opening, a dust suction pipe 13 is fixedly connected to the top of the screening box 1. An induced draft fan 14 is installed on the dust suction pipe 13. A filter screen is arranged at the air inlet of the dust suction pipe 13. The dust suction pipe 13 is connected to a dust collector. When the induced draft fan 14 is started, the air inside the screening box 1 is continuously sucked, so that a negative pressure is formed inside the screening box 1, and the air flow enters the box from each opening on the screening box 1.
[0021] To store the hose 9 and prevent the hose 9 from being alternately knotted and affecting its use, a coiler 10 is installed outside the screening box 1. The hose 9 is wound around the coiler 10. The coiler 10 can be a hand-cranked coiler. In this case, the operator needs to manually rotate the crank to store the hose 9. It can also be a coiler with a coiling spring, which can automatically store the hose 9. The other end of the hose 9 is connected to a gas source.
[0022] To support the overall stability of the device and the lifting device, four support legs 15 are fixedly connected to the outside of the bottom of the screening box 1.
[0023] The specific working process of the present utility model is as follows:
[0024] Start the coarse screening vibrating screen 2, the fine screening vibrating screen 3, and the induced draft fan 14 in sequence. Add the processed fine-grained limestone ore material into the feed hopper 4. At the same time, start the star-shaped discharge valve 6 to continuously feed the material into the screening box 1. The guide plate 7 guides the falling material to the upwardly inclined side of the coarse screening vibrating screen 2. The material is screened under the vibration of the coarse screening vibrating screen 2. The material with a particle size larger than the screen holes of the coarse screening vibrating screen 2 falls into the coarse material receiving hopper 11 at the other end of the coarse screening vibrating screen 2 and is collected and stored as coarse material. The remaining material falls to the fine screening vibrating screen 3 for further screening. The material with a particle size larger than the screen holes of the fine screening vibrating screen 3 falls into the fine material receiving hopper 12 at the other end of the fine screening vibrating screen 3 and is collected and stored as fine material. The remaining material falls and is discharged through the fine material outlet 5 and is collected and stored as fine material. When the screen holes of the fine screening vibrating screen 3 are blocked, the operator can temporarily stop the screening operation, turn off the fine screening vibrating screen 3, open the valve connecting the hose 9 to the gas source, the air flow passes through the hose 9 and the air supply pipe 83 and finally sprays out from the nozzle 81. Control the output end of the telescopic cylinder 82 to continuously extend to clean the screen holes of the fine screening vibrating screen 3. After the cleaning is completed, control the output end of the telescopic cylinder 82 to retract to its original position, close the gas source valve, open the fine screening vibrating screen 3, and perform the screening operation again.
Claims
1. A fine screening classifier, comprising a screening box (1), a coarse screen vibrating screen (2), and a fine screen vibrating screen (3), wherein the top of the screening box (1) is fixedly connected to a feed hopper (4), and the bottom is fixedly connected to a fine material outlet (5), the coarse screen vibrating screen (2) and the fine screen vibrating screen (3) are sequentially installed inside the screening box (1) from top to bottom, the coarse screen vibrating screen (2) and the fine screen vibrating screen (3) are both inclined and one end of the inclined downward extends to the outside of the screening box (1), characterized in that: A star-shaped discharge valve (6) is installed in the feed hopper (4), and a guide plate (7) is obliquely arranged below the star-shaped discharge valve (6) and above the coarse screen vibrating screen (2). The inclination direction of the guide plate (7) is opposite to that of the coarse screen vibrating screen (2). Both sides of the guide plate (7) are fixedly connected to the inner wall of the screening box (1). A cleaning mechanism (8) is arranged below the fine screen vibrating screen (3), and the cleaning mechanism comprises a nozzle (81), a telescopic cylinder (82), and an air supply pipe (83). The telescopic cylinder (82) is fixedly connected to the inner wall of the screening box (1), and the output end of the telescopic cylinder (82) is fixedly connected to one side of the air supply pipe (83). The air supply pipe (83) is equipped with a plurality of nozzles (81) arranged upward, and the air inlet interface of the air supply pipe (83) is connected to an air source through a hose (9).
2. The fine screening classifier according to claim 1, characterized in that: A coarse material receiving hopper (11) is provided below one end of the coarse screen vibrating screen (2) that is inclined downward, and a fine material receiving hopper (12) is provided below one end of the fine screen vibrating screen (3) that is inclined downward, and one side of each of the coarse material receiving hopper (11) and the fine material receiving hopper (12) is fixedly connected to the outside of the screening box (1).
3. The fine screening classifier according to claim 1, characterized in that: A dust suction pipe (13) is fixedly connected to the top of the screening box (1), an induced draft fan (14) is installed on the dust suction pipe (13), and a filter screen is provided at the air inlet of the dust suction pipe (13).
4. The fine screening classifier according to claim 1, characterized in that: A hose reel (10) is installed outside the screening box (1), the hose (9) is wound around the hose reel (10), and the other end of the hose (9) is connected to an air source.
5. The fine screening classifier according to claim 1, characterized in that: Four supporting legs (15) are fixedly connected to the outer side of the bottom of the screening box (1).