Coal screening device

Abstract

The present application discloses a coal screening device, relates to the technical field of coal screening, and comprises a frame body and a screening table, the top of the frame body is provided with a spring, the top of the spring is fixedly provided with a connecting block, the end of the connecting block is fixedly connected with the side wall of the screening table, a plurality of screening holes are formed in the screening table, the screening table is arranged in an inclined manner, the highest end of the screening table is provided with a dispersing mechanism for uniformly dispersing the coal raw materials, and the side wall of the screening table is provided with a dredging mechanism capable of dredging and cleaning the screening holes, the dispersing mechanism is used to uniformly disperse the coal raw materials to each area of the screening table, the accumulation phenomenon is avoided, the effective screening area is increased, the dredging mechanism can timely dredge the blocked screening holes, the coal raw materials can be separated according to the particle size, the screening quality is prevented from being reduced, the screening process is smoother and more efficient, and the overall production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal screening technology, and more specifically to coal screening devices. Background Technology

[0002] Coal is a solid combustible mineral formed gradually from ancient plants buried underground through complex biochemical and physicochemical changes. Known as "black gold" and the "food of industry," coal has been one of the world's primary energy sources since the 18th century. The supply of coal is crucial to the stability of my country's industrial development and all aspects of society; therefore, coal supply security is a vital link in my country's energy security. When unearthed, coal is mostly in the form of lumps of varying shapes and sizes, requiring screening and sorting.

[0003] A coal vibrating screening device with existing patent publication number CN115254283B includes an inclined support plate, a screening frame, a screening mechanism, four sets of support mechanisms, a reciprocating shaking mechanism, and a crushing mechanism. The screening frame is located on the upper side of the support plate. Multiple springs are fixedly connected between one side of the screening frame and the support plate, and multiple hinges are fixedly connected between the other side of the screening frame and the support plate, so as to drive the entire screening frame to reciprocate. The screening plate reciprocates with the screening frame, and the coal is quickly screened by the reciprocating shaking of the screening plate. The overall inclined structure of the screening frame and the screening plate, and the inclined plate based on the inclined angle of the screening plate, can slow down the movement speed of the coal when it is shaken, maintain sufficient screening time, and effectively improve the screening effect.

[0004] However, when the aforementioned screening device screens and filters coal raw materials, the coal raw materials tend to accumulate when conveyed from the crushing mechanism to the screening plate. The accumulated coal raw materials cannot be dispersed evenly and promptly to various areas of the screening plate for screening. This not only reduces the effective screening area of ​​the screening plate but also significantly reduces the screening efficiency. Furthermore, the coal raw materials are usually not effectively cleared during screening and filtration. Large particles are more likely to clog the screen holes due to their larger size. The clogged screen holes cannot effectively separate the coal raw materials according to particle size, further affecting the filtration efficiency of the coal raw materials and causing a decline in screening quality. Summary of the Invention

[0005] The purpose of this invention is to provide a coal screening device to solve the problem that existing screening devices are prone to coal material accumulation during screening, which leads to a reduction in the effective screening area of ​​the screening plate, a decrease in screening efficiency, difficulty in effectively clearing coal material, and a decline in screening quality.

[0006] A coal screening device includes a frame and a screening table. A spring is mounted on the top of the frame, and a connecting block is fixedly mounted on the top of the spring. The end of the connecting block is fixedly connected to the side wall of the screening table. Multiple screening holes are provided on the screening table. A support plate and a mounting base are provided on the top of the frame. An eccentric wheel is rotatably mounted on the side wall of the support plate. A motor is fixedly mounted on the mounting base. The output shaft of the motor is connected to the rotating rod of the eccentric wheel via a belt drive. The eccentric shaft of the eccentric wheel is fixedly connected to the side wall of the screening table. The screening table is inclined. A dispersion mechanism for uniformly dispersing coal raw materials is provided at the highest end of the screening table. A clearing mechanism for unblocking and cleaning the screening holes is provided on the side wall of the screening table.

[0007] Preferably, the dispersing mechanism includes a mounting frame fixedly mounted on the top of the screening table, a feed hopper mounted on the mounting frame, two side plates symmetrically arranged along the central axis at the bottom of the screening table, a rotating shaft rotatably mounted on the side wall of the side plate, a synchronous belt connecting the rotating shaft and an eccentric wheel, a first bevel gear fixedly mounted on the shaft of the rotating shaft, a rotating block rotatably mounted on the top of the screening table, a second bevel gear meshing with the first bevel gear fixedly mounted on the bottom of the rotating block extending outside the screening table, the rotating block being a hollow structure with an open top, a return spring mounted on the bottom of the rotating block, a connecting rod mounted on the top of the return spring, a dispersing plate mounted on the top of the connecting rod, an adjusting block coaxially mounted on the top of the screening table and coaxially mounted on the rotating block, a notch mounted on the top of the adjusting block, and the bottom of the dispersing plate abutting against the top of the adjusting block.

[0008] Preferably, a limiting groove is formed on the side wall of the rotating block, and a limiting block is movably disposed in the limiting groove. The end of the limiting block is fixedly connected to the side wall of the connecting rod.

[0009] Preferably, the side wall of the adjusting block away from the feed hopper is provided with a partition, and the bottom of the partition is fixedly connected to the top of the screening table.

[0010] Preferably, the unblocking mechanism includes two supports fixedly mounted on the side wall of the screening table. A guide rod is fixedly mounted on one side of each support, and a lead screw is rotatably mounted on the other side. A drive motor is mounted on the side wall of each support near the lead screw. The output end of the drive motor is connected to the lead screw. A moving block is threadedly connected to the lead screw. A moving sleeve is provided inside the moving block. A main bevel gear is fixedly mounted outside the moving sleeve. A secondary bevel gear is rotatably mounted on the inner side wall of the moving block and meshes with the main bevel gear. A connecting shaft extending outside the moving block is fixedly mounted at the end of the secondary bevel gear. A cleaning roller is fixedly mounted at the end of the connecting shaft. A guide block is movably mounted on the outer circumference of the guide rod. The side wall of the guide block is rotatably connected to the cleaning roller. Multiple brushes are provided on the circumferential surface of the cleaning roller.

[0011] Preferably, the cross-section of the screening hole is trapezoidal.

[0012] Preferably, each of the frame bodies is fixedly provided with a stabilizing base.

[0013] The advantages of this invention are as follows: The coal screening device of this invention, by setting a dispersing mechanism, evenly disperses the coal raw material into various areas of the screening table, avoiding accumulation and increasing the effective screening area. By setting a clearing mechanism, blocked screening holes can be cleared in time, ensuring that the coal raw material is separated according to particle size, avoiding a decline in screening quality, making the screening process smoother and more efficient, and improving the overall production efficiency. At the same time, the vibration and tilting of the screening table promotes the downward movement of the coal raw material, further improving the screening efficiency. Attached Figure Description

[0014] Figure 1 , 2 These are schematic diagrams of the structure of the present invention from different perspectives.

[0015] Figure 3 This is a cross-sectional view of the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of the present invention without the dredging mechanism installed.

[0017] Figure 5 This is a schematic diagram of the dispersing mechanism in the present invention. Figure 1 .

[0018] Figure 6 This is a schematic diagram of the dispersing mechanism in the present invention. Figure 2 .

[0019] Among them, 100, frame; 101, stabilizing base; 102, spring; 103, connecting block; 104, screening table; 105, screening hole; 106, support plate; 107, mounting base; 108, motor; 109, belt; 110, eccentric wheel; 200, unblocking mechanism; 201, bracket; 202, guide rod; 203, lead screw; 204, moving block; 205, cleaning roller; 206, brush; 207, drive motor; 208. 209. Main bevel gear; 210. Secondary bevel gear; 301. Connecting shaft; 302. Dispersing mechanism; 303. Feed hopper; 304. Mounting bracket; 305. Partition plate; 306. Side plate; 307. Rotating shaft; 308. Synchronous belt; 309. First bevel gear; 310. Second bevel gear; 311. Adjusting block; 312. Rotating block; 313. Dispersing plate; 314. Limiting groove; 315. Limiting block; 316. Return spring. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 6 As shown, the coal screening device includes a frame 100 and a screening table 104. A spring 102 is provided on the top of the frame 100, and a connecting block 103 is fixedly mounted on the top of the spring 102. The end of the connecting block 103 is fixedly connected to the side wall of the screening table 104. The screening table 104 has multiple screening holes 105. A support plate 106 and a mounting base 107 are provided on the top of the frame 100. An eccentric wheel 110 is rotatably mounted on the side wall of the support plate 106. A motor 108 is fixedly mounted on the base 107. The output shaft of the motor 108 is connected to the rotating rod of the eccentric wheel 110 by a belt 109. The eccentric shaft of the eccentric wheel 110 is fixedly connected to the side wall of the screening table 104. The screening table 104 is inclined. The highest end of the screening table 104 is provided with a dispersing mechanism 300 for uniformly dispersing coal raw materials. The side wall of the screening table 104 is provided with a clearing mechanism 200 for clearing and cleaning the screening holes 105.

[0022] The motor 108 starts and drives the eccentric wheel 110 to rotate via the belt 109. The eccentric shaft of the eccentric wheel 110 is fixedly connected to the side wall of the screening table 104, so the screening table 104 will vibrate accordingly, which helps to screen the coal raw material. The structural design of the spring 102 and the connecting block 103 can buffer the impact force during the screening process and extend the service life of the screening device. The coal raw material is screened on the screening table 104, and coal raw materials of different particle sizes are separated through multiple screening holes 105. The inclined setting of the screening table 104 helps the coal raw material slide down the screening table, improving the screening efficiency.

[0023] In this embodiment, the dispersing mechanism 300 includes a mounting frame 302 fixedly mounted on the top of the screening table 104. A feed hopper 301 is mounted on the mounting frame 302. The bottom of the screening table 104 has two side plates 304 symmetrically arranged along its central axis. A rotating shaft 305 is rotatably mounted on the side wall of the side plate 304. A synchronous belt 306 is connected between the rotating shaft 305 and the eccentric wheel 110. A first bevel gear 307 is fixedly sleeved on the shaft of the rotating shaft 305. A rotating block 310 is rotatably mounted on the top of the screening table 104. The bottom of the rotating block 310 extends through the screening table 104 and is fixedly mounted with a second bevel gear 308 that meshes with the first bevel gear 307. The rotating block 310 is a hollow structure with an open top. The rotating block 310 has a return spring 315 at its bottom, a connecting rod 311 at its top, a dispersing plate 312 at its top, and an adjusting block 309 coaxially arranged with the rotating block 310 at its top. The adjusting block 309 has a notch at its top, and the bottom of the dispersing plate 312 abuts against the top of the adjusting block 309. The rotating block 310 has a limiting groove 313 on its side wall, and a limiting block 314 is movably arranged in the limiting groove 313. The end of the limiting block 314 is fixedly connected to the side wall of the connecting rod 311. The adjusting block 309 has a partition 303 on its side wall away from the feed hopper 301, and the bottom of the partition 303 is fixedly connected to the top of the screening table 104.

[0024] As the eccentric wheel 110 rotates, it drives the rotating shaft 305 to rotate via the synchronous belt 306. The first bevel gear 307 on the rotating shaft 305 meshes with the second bevel gear 308 at the top of the screening table 104, causing the rotating block 310 to rotate. The rotation of the rotating block 310 drives the dispersing plate 312 to adjust along the shape of the adjusting block 309. The return spring 315 inside the rotating block 310 causes the dispersing plate 312 to move up and down during rotation. When it moves to the discharge port of the feed hopper 301, the dispersing plate 312 moves down and approaches the screening table. 104. As the rotating block 310 rotates, the coal raw material is evenly dispersed by the dispersing plate 312, thereby effectively dispersing the coal raw material evenly to various areas of the screening table 104, enhancing the screening effect of the device. When the dispersing plate 312 moves away from the feed hopper 301, the dispersing plate 312 moves upward, and the partition plate 303 prevents the coal raw material from moving excessively with the dispersing plate 312, avoiding residual coal raw material that has not been screened. The setting of the limiting groove 313 and the limiting block 314 makes the up-and-down movement of the dispersing plate 312 more stable, improving the stability of the device.

[0025] In this embodiment, the unblocking mechanism 200 includes two supports 201 fixedly mounted on the side wall of the screening table 104. A guide rod 202 is fixedly mounted on one side of each support 201, and a lead screw 203 is rotatably mounted on the other side. A drive motor 207 is mounted on the side wall of each support 201 near the lead screw 203. The output end of the drive motor 207 is connected to the lead screw 203. A moving block 204 is threaded onto the body of the lead screw 203, and a moving sleeve is provided inside the moving block 204. The movable block 204 is fixedly fitted with a main bevel gear 208. The inner sidewall of the movable block 204 is rotatably fitted with a secondary bevel gear 209 that meshes with the main bevel gear 208. The end of the secondary bevel gear 209 is fixedly fitted with a connecting shaft 210 extending out of the movable block 204. The end of the connecting shaft 210 is fixedly fitted with a cleaning roller 205. The guide rod 202 is movably fitted with a guide block. The sidewall of the guide block is rotatably connected to the cleaning roller 205. The circumferential surface of the cleaning roller 205 is provided with a plurality of brushes 206.

[0026] When the screening hole 105 becomes clogged, the drive motor 207 starts and drives the moving block 204 to move along the guide rod 202 via the lead screw 203. The main bevel gear 208 and the secondary bevel gear 209 inside the moving block 204 mesh, driving the connecting shaft 210 and the cleaning roller 205 to rotate. Multiple brushes 206 on the cleaning roller 205 unclog the screening hole 105, ensuring the continuous screening process and ensuring that the coal raw material is separated according to particle size, thus avoiding a decline in screening quality.

[0027] In this embodiment, the cross-section of the sieve hole 105 is trapezoidal.

[0028] The trapezoidal cross-section design of the screening aperture 105 helps reduce clogging and improve screening efficiency and quality.

[0029] In this embodiment, a stabilizing base 101 is fixedly provided at the bottom of each frame 100.

[0030] The stabilizing base 101 at the bottom of the frame 100 ensures the stability and reliability of the screening device, preventing shaking or tilting during the screening process.

[0031] Working process and principle: When in use, coal raw material enters the screening device through the feed hopper 301. The motor 108 starts and drives the eccentric wheel 110 to rotate via the belt 109. The eccentric shaft of the eccentric wheel 110 is fixedly connected to the side wall of the screening table 104, so the screening table 104 will vibrate, which helps to screen the coal raw material. At the same time, the eccentric wheel 110 drives the rotating shaft 305 to rotate via the synchronous belt 306. The first bevel gear 307 on the rotating shaft 305 meshes with the second bevel gear 308 on the top of the screening table 104, causing the rotating block 310 to rotate. The rotation of the rotating block 310 drives the dispersing plate 312 to adjust along the shape of the adjusting block 309. The return spring in the rotating block 310 is used to adjust the position of the plate. Spring 315 causes the dispersing plate 312 to move up and down during rotation, which evenly disperses the coal raw material, thereby effectively dispersing the coal raw material evenly to various areas of the screening table 104 and enhancing the screening effect of the device. When the screening hole 105 is blocked, the drive motor 207 starts and drives the moving block 204 to move along the guide rod 202 through the lead screw 203. The main bevel gear 208 and the secondary bevel gear 209 in the moving block 204 mesh, driving the connecting shaft 210 and the cleaning roller 205 to rotate. Multiple brushes 206 on the cleaning roller 205 unclog the screening hole 105, ensuring the continuous screening process and ensuring that the coal raw material is separated according to particle size, thus avoiding a decrease in screening quality.

[0032] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or equivalent to the scope of this invention are included in this invention.

Claims

1. A coal screening device, characterized in that: The system includes a frame (100) and a screening table (104). A spring (102) is provided on the top of the frame (100), and a connecting block (103) is fixedly provided on the top of the spring (102). The end of the connecting block (103) is fixedly connected to the side wall of the screening table (104). The screening table (104) has multiple screening holes (105). A support plate (106) and a mounting base (107) are provided on the top of the frame (100). An eccentric wheel (110) is rotatably provided on the side wall of the support plate (106). The mounting base (107)... 07) A motor (108) is fixedly installed on the screen. The output shaft of the motor (108) is connected to the rotating rod of the eccentric wheel (110) by a belt (109). The eccentric shaft of the eccentric wheel (110) is fixedly connected to the side wall of the screening table (104). The screening table (104) is inclined. The highest end of the screening table (104) is provided with a dispersing mechanism (300) for uniformly dispersing coal raw materials. The side wall of the screening table (104) is provided with a clearing mechanism (200) for clearing and cleaning the screening holes (105). The dispersing mechanism (300) includes a mounting frame (302) fixedly mounted on the top of the screening table (104). A feed hopper (301) is mounted on the mounting frame (302). The bottom of the screening table (104) is provided with two side plates (304) symmetrically arranged along its central axis. A rotating shaft (305) is rotatably mounted on the side wall of the side plate (304). A synchronous belt (306) is connected between the rotating shaft (305) and the eccentric wheel (110). A first bevel gear (307) is fixedly sleeved on the shaft of the rotating shaft (305). A rotating block (310) is rotatably mounted on the top of the screening table (104). The bottom of the rotating block (310) is... A second bevel gear (308) is fixedly installed outside the screening table (104) and meshes with the first bevel gear (307). The rotating block (310) is a hollow structure with an open top. A return spring (315) is provided at the bottom of the rotating block (310). A connecting rod (311) is provided at the top of the return spring (315). A dispersing plate (312) is provided at the top of the connecting rod (311). An adjusting block (309) is provided at the top of the screening table (104) and is coaxially arranged with the rotating block (310). A notch is provided at the top of the adjusting block (309). The bottom of the dispersing plate (312) abuts against the top of the adjusting block (309). The rotating block (310) has a limiting groove (313) on its side wall, and a limiting block (314) is movably provided in the limiting groove (313). The end of the limiting block (314) is fixedly connected to the side wall of the connecting rod (311). The adjusting block (309) has a partition (303) on its side wall away from the feed hopper (301), and the bottom of the partition (303) is fixedly connected to the top of the screening table (104).

2. The coal screening device according to claim 1, characterized in that: The unblocking mechanism (200) includes two supports (201) fixedly mounted on the side wall of the screening table (104). A guide rod (202) is fixedly mounted on one side of each support (201), and a lead screw (203) is rotatably mounted on the other side. A drive motor (207) is mounted on the side wall of each support (201) near the lead screw (203). The output end of the drive motor (207) is connected to the lead screw (203). A moving block (204) is threaded onto the body of the lead screw (203). A moving sleeve is provided inside the moving block (204). A main bevel gear (208) is fixedly sleeved on the outside of the sleeve. A secondary bevel gear (209) is rotatably provided on the inner side wall of the moving block (204) and meshes with the main bevel gear (208). A connecting shaft (210) extending to the outside of the moving block (204) is fixedly provided at the end of the secondary bevel gear (209). A cleaning roller (205) is fixedly provided at the end of the connecting shaft (210). A guide block is movably sleeved on the outer periphery of the guide rod (202). The side wall of the guide block is rotatably connected to the cleaning roller (205). A plurality of brushes (206) are provided on the circumferential surface of the cleaning roller (205).

3. The coal screening device according to claim 1, characterized in that: The cross-section of the sieve hole (105) is trapezoidal.

4. The coal screening device according to claim 3, characterized in that: Each frame (100) is fixedly provided with a stabilizing base (101) at its bottom.

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