A multi-stage material screening device

Abstract

This utility model discloses a multi-stage material screening device, relating to the field of material screening technology. The utility model includes a housing with two screening boxes inside, and a vibration mechanism located on the front of the housing. The vibration mechanism is used to remove residues adhering to the inside of the two screening boxes. Specifically, when the electric push rod extends, it drives the rack to move to the right, causing the rotating shaft and cylinder to rotate clockwise. After the cylinder enters the U-shaped groove, it pushes the shaped block to rotate counterclockwise, causing the right-side moving rod to move backward. The impact block strikes the screening box. When the electric push rod retracts, the rack drives the rotating shaft to rotate counterclockwise, the cylinder re-enters the U-shaped groove, causing the shaped block to rotate clockwise, and the left-side impact block strikes the mounting box. This repeated impact dislodges adhering materials and blockages from the screening boxes. This design, by changing the vibration direction, effectively improves the cleaning effect.

Description

Technical Field

[0001] This utility model belongs to the field of material screening technology, and in particular relates to a multi-stage material screening device. Background Technology

[0002] In industrial production, mining, building materials, agricultural processing and chemical industries, particle size classification of materials is a key process to ensure the accuracy of subsequent processing, product quality and production efficiency. Multi-stage screening devices are widely used in various material handling scenarios because they can complete the separation of multiple particle size ranges in one operation.

[0003] Since the materials may contain impurities such as moisture and sand, prolonged operation may cause water and sand to mix and adhere to the screen or clog the screen holes, resulting in a significant reduction in screening efficiency. Existing multi-stage screening devices mostly screen by rotating an eccentric shaft, but the rotation of the eccentric shaft only causes the screen to move up and down, resulting in a relatively limited vibration direction. Therefore, it is difficult to effectively remove the adhering materials and blockages from the screen surface and the inner wall of the screen holes. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage material screening device. By incorporating a vibration mechanism, specifically, when the electric push rod extends, it drives the rack to move to the right, causing the rotating shaft and cylinder to rotate clockwise. After the cylinder enters the U-shaped groove, it pushes the shaped block to rotate counterclockwise, causing the right-side moving rod to move backward. The impact block strikes the screening box. When the electric push rod retracts, the rack drives the rotating shaft to rotate counterclockwise, and the cylinder re-enters the U-shaped groove, causing the shaped block to rotate clockwise. The left-side impact block strikes the mounting box. This continuous repetitive impact helps to remove deposits and blockages from the screening box. This design, by changing the vibration direction, effectively improves the cleaning effect and solves the problem that existing multi-stage screening devices often rely on eccentric shaft rotation for screening, but the eccentric shaft results in a relatively fixed screen movement direction, making it difficult to effectively clean the screen.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a multi-stage material screening device, including a housing, inside which two screening boxes are arranged, and further comprising:

[0007] A vibration mechanism, located on the front of the housing, is used to remove residues adhering to the inside of the two screening boxes. The vibration mechanism includes a third rotating shaft and a fourth rotating shaft. Two irregularly shaped blocks are fixedly connected to the outer surface of the third rotating shaft, and two rotating blocks are fixedly connected to the outer surface of the fourth rotating shaft.

[0008] An adjustment mechanism is provided on the left side of the screening box, and the adjustment mechanism is used to adjust the angle of the screening box;

[0009] The adjustment mechanism is provided in two sets. A hopper is fixedly connected to the top of the box. A screening box is provided inside the box. An eccentric shaft is rotatably connected inside the box. A motor is fixedly connected to the front of the box. The output end of the motor is fixedly connected to the front of the eccentric shaft through a coupling.

[0010] Furthermore, a rotating shaft is fixedly connected to the bottom left side of the screening box, and the rotating shaft is rotatably connected to the box body. A rotating shaft is rotatably connected to the right side of the bottom of each of the two screening boxes, and the rotating shaft is rotatably connected to the screening box.

[0011] Both screening boxes are fixedly connected to the bottom of anti-splash plates, and drawers are inserted into the inside of the box. The height of the lower anti-splash plate is higher than that of the upper anti-splash plate.

[0012] Furthermore, an installation box is fixedly connected to the front of the housing, and two movable slots are opened on the back of the installation box. Two limiting blocks are fixedly connected to the inner walls of the two movable slots. Two movable rods are slidably limited and engaged inside the two movable slots. An impact block is fixedly connected to one end of the back of each of the two movable rods. A limiting groove is opened inside the movable rod. A fixing ring is fixedly connected to the outer surface of the movable rod. A spring is fixedly connected to the back of the fixing ring. The other end of the spring is fixedly connected to the front of the inner wall of the installation box.

[0013] The impact block is made of rubber, and the limiting block is slidably limited in conjunction with the limiting groove.

[0014] Furthermore, both the third and fourth rotating shafts are rotatably connected to the mounting box, and the front of the irregular block is provided with two arc surfaces and a U-shaped groove;

[0015] The two arc surfaces are symmetrically arranged, and anti-detachment round blocks are fixedly connected to the top and bottom of the three and four rotating shafts.

[0016] Furthermore, cylinders are fixedly connected to the outer surfaces of both rotating blocks, and several teeth are fixedly connected to the center of the four outer surfaces of the rotating shaft;

[0017] The outer surface of the rotating block is adapted to the arc surface, and the cylinder is slidably limited by the U-shaped groove.

[0018] Furthermore, a fixing frame is fixedly connected to the inner wall of the mounting box, a second movable groove is provided inside the fixing frame, an electric push rod is fixedly connected to the bottom of the fixing frame, a connecting block is fixedly connected to the right output end of the electric push rod, and a rack is fixedly connected to the left side of the connecting block;

[0019] The connecting block is slidably limited to the moving groove two, and the rack is engaged with several teeth on the outer surface of the rotating shaft four.

[0020] Furthermore, each of the two screening boxes has a mounting ring fixedly connected to its left side. An adjusting rod is rotatably connected inside the mounting ring. Several locking blocks are fixedly connected to the outer surface of the adjusting rod. Two arc-shaped grooves are opened on the front and back of the screening box. Several locking slots are opened inside the arc-shaped grooves. An elastic rope is fixedly connected to the left side of the screening box. A pin is fixedly connected to the other end of the elastic rope. The bottom of the outer surface of the pin is threaded. A nut is connected to the pin through the thread.

[0021] The pin is inserted into the mounting ring and the adjusting rod, the locking block is inserted into the locking slot, and the elastic rope is made of elastic material.

[0022] This utility model has the following beneficial effects:

[0023] 1. This utility model incorporates a vibration mechanism. Specifically, when the electric push rod extends, it drives the rack to move to the right, causing the rotating shaft and cylinder to rotate clockwise through the teeth. After the cylinder enters the U-shaped groove, it pushes the irregularly shaped block to rotate counterclockwise, causing the right-side moving rod to move backward. The impact block then strikes the screening box. When the electric push rod retracts, the rack drives the rotating shaft to rotate counterclockwise, and the cylinder re-enters the U-shaped groove, causing the irregularly shaped block to rotate clockwise. The left-side impact block then strikes the mounting box. This continuous repetitive impact can dislodge the attached materials and blockages on the screening box. This design, by changing the vibration direction, can effectively improve the cleaning effect.

[0024] 2. This utility model uses an adjustment mechanism. Specifically, the nut is turned counterclockwise to remove it, and the pin is pulled out. Then, the adjustment rod is pulled forward. At this time, several locking blocks are disengaged from their corresponding slots, allowing for adjustment. After adjustment, the adjustment rod is inserted back into its original position, and the locking blocks are put into their corresponding slots. Then, the pin is reinserted into the mounting ring and the adjustment rod, and the nut is tightened counterclockwise.

[0025] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the rotating shaft of this utility model;

[0029] Figure 3 This is a schematic diagram of the anti-splash plate structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the overall structure of the adjustment mechanism of this utility model;

[0031] Figure 5 This is a schematic diagram of the overall structure of the vibration mechanism of this utility model;

[0032] Figure 6 This is a schematic diagram of the U-shaped groove structure of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Box body; 11. Hopper; 12. Screening box; 121. Eccentric shaft; 122. Motor; 123. Rotating shaft one; 13. Screening box; 131. Rotating shaft two; 132. Anti-splash plate; 133. Drawer; 2. Vibration mechanism; 21. Mounting box; 211. Moving groove one; 212. Limiting block; 22. Moving rod; 221. Impact block; 222. Limiting groove; 223. Fixing ring; 224. Spring; 23. Rotating shaft three; 231. 232. Irregularly shaped block; 233. Arc surface; 233. U-shaped groove; 24. Rotating shaft four; 241. Rotating block; 242. Cylinder; 243. Tooth; 25. Fixed frame; 251. Moving groove two; 252. Electric push rod; 253. Connecting block; 254. Rack; 3. Adjusting mechanism; 31. Mounting ring; 311. Adjusting rod; 312. Locking block; 32. Arc groove; 321. Locking groove; 33. Pin; 331. Elastic rope; 332. Nut. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-6As shown, this utility model is a multi-stage material screening device, including a box 1, with two screening boxes 13 inside the box 1, and also includes: a vibration mechanism 2, which is located on the front of the box 1 and is used to remove residues attached to the inside of the two screening boxes 13. The vibration mechanism 2 includes a third rotating shaft 23 and a fourth rotating shaft 24. Two irregularly shaped blocks 231 are fixedly connected to the outer surface of the third rotating shaft 23, and two rotating blocks 241 are fixedly connected to the outer surface of the fourth rotating shaft 24; and an adjustment mechanism 3, which is located on the left side of the screening box 13 and is used to adjust the angle of the screening box 13. There are two sets of adjustment mechanisms 3. A hopper 11 is fixedly connected to the top of the box 1. A screening box 12 is located inside the box 1. An eccentric shaft 121 is rotatably connected inside the box 1. A motor 122 is fixedly connected to the front of the box 1. The output end of the motor 122 is fixedly connected to the front of the eccentric shaft 121 through a coupling. A rotating shaft 123 is fixedly connected to the bottom left side of the screening box 12. The rotating shaft 123 is rotatably connected to the box body 1. A rotating shaft 131 is rotatably connected to the right side of the bottom of each of the two screening boxes 13. The rotating shaft 131 is rotatably connected to the screening box 12. A splash guard 132 is fixedly connected to the bottom of each of the two screening boxes 13. A drawer 133 is inserted into the inside of the box body 1. The splash guard 132 located below is higher than the splash guard 132 located above. The front of the housing 1 is fixedly connected to the mounting box 21. The back of the mounting box 21 has two moving slots 211. The inner walls of the two moving slots 211 are fixedly connected to two limiting blocks 212. The two moving slots 211 are slidably limited by two moving rods 22. One end of the back of each moving rod 22 is fixedly connected to an impact block 221. The moving rod 22 has a limiting groove 222 inside. The outer surface of the moving rod 22 is fixedly connected to a fixing ring 223. The back of the fixing ring 223 is fixedly connected to a spring 224. The other end of the spring 224 is fixedly connected to the front of the inner wall of the mounting box 21. The impact block 221 is made of rubber, and the limiting block 212 is slidably limited by the limiting groove 222. Both rotating shafts 23 and 24 are rotatably connected to the mounting box 21. The front of the irregular block 231 is provided with two arc surfaces 232 and a U-shaped groove 233; the two arc surfaces 232 are symmetrically arranged. Anti-detachment round blocks are fixedly connected to the top and bottom of both rotating shafts 23 and 24. The outer surfaces of the two rotating blocks 241 are fixedly connected with cylinders 242, and the center of the outer surface of the rotating shaft 24 is fixedly connected with several teeth 243; the outer surface of the rotating block 241 is adapted to the arc surface 232, and the cylinder 242 and the U-shaped groove 233 are in sliding limit engagement.A mounting bracket 25 is fixedly connected to the inner wall of the mounting box 21. A movable groove 251 is opened inside the mounting bracket 25. An electric push rod 252 is fixedly connected to the bottom of the mounting bracket 25. A connecting block 253 is fixedly connected to the right output end of the electric push rod 252, and a rack 254 is fixedly connected to the left side of the connecting block 253. When the electric push rod 252 extends, it drives the rack 254 to move to the right, and through the teeth 243, it causes the rotating shaft 24 and the cylinder 242 to rotate clockwise. After the cylinder 242 enters the U-shaped groove 233, it pushes the irregular block 231 to rotate counterclockwise, causing the right movable rod 22 to move backward and impact... When block 221 impacts the screening box 12, and the electric push rod 252 retracts, the rack 254 drives the rotating shaft 24 to rotate counterclockwise. The cylinder 242 re-enters the U-shaped groove 233, causing the irregular block 231 to rotate clockwise. The left impact block 221 impacts the mounting box 21. This repeated impact can dislodge the attached materials and blockages on the screening box 13. This setting can effectively improve the cleaning effect by changing the vibration direction. Among them, the connecting block 253 and the moving groove 251 are in sliding limit cooperation, and the rack 254 is engaged with several teeth 243 on the outer surface of the rotating shaft 24. Each of the two screening boxes 13 has a mounting ring 31 fixedly connected to its left side. An adjusting rod 311 is rotatably connected inside the mounting ring 31. Several locking blocks 312 are fixedly connected to the outer surface of the adjusting rod 311. Two arc-shaped grooves 32 are formed on both the front and back of the screening box 12. Several locking slots 321 are formed inside the arc-shaped grooves 32. An elastic rope 331 is fixedly connected to the left side of the screening box 13. A pin 33 is fixedly connected to the other end of the elastic rope 331. The bottom of the outer surface of the pin 33 is threaded, and a nut 332 is threadedly connected to the pin 33. The nut 332 is rotated counterclockwise. Remove 332 and pull out the pin 33. Then pull the adjusting rod 311 forward. At this time, several locking blocks 312 will leave their corresponding slots 321, allowing for adjustment. After adjustment, insert the adjusting rod 311 back into its original position and allow the locking blocks 312 to enter their corresponding slots 321. Then reinsert the pin 33 into the mounting ring 31 and the adjusting rod 311, and tighten the nut 332 counterclockwise. The pin 33 is inserted into the mounting ring 31 and the adjusting rod 311, the locking blocks 312 are inserted into the slots 321, and the elastic rope 331 is made of elastic material.

[0037] A specific application of this embodiment is as follows: When in use, the motor 122 is started to drive the eccentric shaft 121 to rotate, and then the material is poured into the hopper 11. When the eccentric shaft 121 rotates, its convex surface will push the screening box 12 upward. When the convex surface stops contacting the screening box 12, the screening box 12 falls down. Continuous rotation can make the two screening boxes 13 vibrate. Material that meets the diameter requirements falling into the upper screening box 13 will fall into the lower screening box 13 through the screen holes. Non-compliant material will be discharged through its right opening. At the same time, compliant material falling into the lower screening box 13 will be discharged through the right opening. Smaller diameter material will fall into the drawer 133 through the screen holes. At this time, the material has been screened.

[0038] Since the rotation of the eccentric shaft 121 only causes the screening box 13 to move up or down, the vibration in one direction is insufficient to remove the attached materials and clogging particles. At this time, the electric push rod 252 is activated to extend, which drives the rack 254 to move to the right through the connecting block 253. At the same time, the rack 254 will cause the rotating shaft 24 to rotate clockwise through several teeth 243. The two rotating blocks 241 and the cylinder 242 follow the rotation. When the cylinder 242 enters the U-shaped groove 233, it will push the irregular block 231 and the rotating shaft 23 to rotate counterclockwise. At this time, the irregular block 231 will push the right moving rod 22 to move to the back. At this time, the spring 224 on the outer surface of the right moving rod 22 is squeezed. When the cylinder 242 has not left the U-shaped groove 233, the impact block 221 has already made contact with the front of the screening box 12. When the cylinder 242 holds When the cylinder 242 rotates and finally disengages from the U-shaped groove 233, the impact block 221 will be squeezed, allowing the cylinder 242 to complete the circumferential motion smoothly. At this time, the rotating block 241 is in close contact with the arc surface 232 on the left side. The moving rod 22 is reset by the spring 224. Since the shaped block 231 loses the push of the cylinder 242, the opening of the U-shaped groove 233 remains unchanged. At this time, the electric push rod 252 is activated to retract, and the rack 254 will drive the rotating shaft 24 and the cylinder 242 to rotate counterclockwise. At this time, the cylinder 242 will re-enter the U-shaped groove 233, causing the shaped block 231 to rotate clockwise. At the same time, the moving rod 22 on the left side will impact the mounting box 21 through the impact block 221. The repeated impacts can cause the attached materials and blockages on the screening box 13 to fall into the drawer 133 or be discharged.

[0039] When the angle of the screening box 13 needs to be changed, the nut 332 can be turned counterclockwise to remove it, and the pin 33 can be pulled out. Then, the adjusting rod 311 is pulled forward. At this time, several locking blocks 312 have left the corresponding slots 321, and the adjustment can be made. After the adjustment is completed, the adjusting rod 311 is inserted back into its original position, and the locking blocks 312 are put into the corresponding slots 321. Then, the pin 33 is reinserted into the mounting ring 31 and the adjusting rod 311, and the nut 332 is tightened counterclockwise.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage material screening device, comprising a housing (1), wherein two screening boxes (13) are disposed inside the housing (1), characterized in that, Also includes: A vibration mechanism (2) is provided on the front of the housing (1). The vibration mechanism (2) is used to remove residues attached to the inside of the two screening boxes (13). The vibration mechanism (2) includes a third rotating shaft (23) and a fourth rotating shaft (24). Two irregularly shaped blocks (231) are fixedly connected to the outer surface of the third rotating shaft (23), and two rotating blocks (241) are fixedly connected to the outer surface of the fourth rotating shaft (24). Adjustment mechanism (3), which is located on the left side of the screening box (13), is used to adjust the angle of the screening box (13); The adjustment mechanism (3) is provided in two sets. A hopper (11) is fixedly connected to the top of the box (1). A screening box (12) is provided inside the box (1). An eccentric shaft (121) is rotatably connected inside the box (1). A motor (122) is fixedly connected to the front of the box (1). The output end of the motor (122) is fixedly connected to the front of the eccentric shaft (121) through a coupling.

2. The multi-stage material screening device according to claim 1, characterized in that, A rotating shaft (123) is fixedly connected to the bottom left side of the screening box (12). The rotating shaft (123) is rotatably connected to the box body (1). A rotating shaft (131) is rotatably connected to the right side of the bottom of the two screening boxes (13). The rotating shaft (131) is rotatably connected to the screening box (12). The bottom of each of the two screening boxes (13) is fixedly connected with a splash guard (132), and a drawer (133) is inserted inside the box body (1). The splash guard (132) located below is higher than the splash guard (132) located above.

3. The multi-stage material screening device according to claim 1, characterized in that, The front of the housing (1) is fixedly connected to the mounting box (21). The back of the mounting box (21) has two moving slots (211). The inner walls of the two moving slots (211) are fixedly connected to two limiting blocks (212). The two moving slots (211) are slidably limited to two moving rods (22). One end of the back of the two moving rods (22) is fixedly connected to an impact block (221). The moving rods (22) have limiting slots (222) inside. The outer surface of the moving rods (22) is fixedly connected to a fixing ring (223). The back of the fixing ring (223) is fixedly connected to a spring (224). The other end of the spring (224) is fixedly connected to the front of the inner wall of the mounting box (21). The impact block (221) is made of rubber, and the limiting block (212) and the limiting groove (222) are slidably limited together.

4. The multi-stage material screening device according to claim 1, characterized in that, The three rotating shafts (23) and four rotating shafts (24) are rotatably connected to the mounting box (21), and the irregular block (231) has two arc surfaces (232) and a U-shaped groove (233) on its front side. Among them, the two arc surfaces (232) are symmetrically arranged, and the top and bottom of the three rotating shafts (23) and the four rotating shafts (24) are fixedly connected with anti-detachment round blocks.

5. A multi-stage material screening device according to claim 4, characterized in that, The outer surfaces of the two rotating blocks (241) are fixedly connected with cylinders (242), and the center of the outer surface of the rotating shaft (24) is fixedly connected with several teeth (243). The outer surface of the rotating block (241) is adapted to the arc surface (232), and the cylinder (242) is slidably limited to the U-shaped groove (233).

6. A multi-stage material screening device according to claim 5, characterized in that, The mounting box (21) is fixedly connected to a fixing frame (25) on its inner wall. The fixing frame (25) has a moving groove (251) inside. An electric push rod (252) is fixedly connected to the bottom of the fixing frame (25). A connecting block (253) is fixedly connected to the right output end of the electric push rod (252). A rack (254) is fixedly connected to the left side of the connecting block (253). The connecting block (253) is slidably limited to the moving groove (251), and the rack (254) is engaged with several teeth (243) on the outer surface of the rotating shaft (24).

7. The multi-stage material screening device according to claim 4, characterized in that, A mounting ring (31) is fixedly connected to the left side of each of the two screening boxes (13). An adjusting rod (311) is rotatably connected inside the mounting ring (31). Several locking blocks (312) are fixedly connected to the outer surface of the adjusting rod (311). Two arc-shaped grooves (32) are opened on the front and back of the screening box (12). Several locking slots (321) are opened inside the arc-shaped grooves (32). An elastic rope (331) is fixedly connected to the left side of the screening box (13). A pin (33) is fixedly connected to the other end of the elastic rope (331). The bottom of the outer surface of the pin (33) is provided with threads. The pin (33) is connected to a nut (332) through the threads. The pin (33) is inserted into the mounting ring (31) and the adjusting rod (311), the locking block (312) is inserted into the locking groove (321), and the elastic rope (331) is made of elastic material.

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