A screen resizing device for particle vibration sieving

Abstract

The present application relates to the technical field of coal mine screening, and particularly relates to a screen mesh diameter changing device for particle vibration screening, which comprises a coaming, vibration mechanisms are arranged on the two sides of the coaming, a plurality of screening strips are fixedly installed on the inner side of the coaming, a rotating strip is arranged between every two adjacent screening strips, rotating rods and rotating shafts are fixedly connected to the front end and the rear end of the plurality of rotating strips respectively, the two ends of the rotating shafts are rotatably matched with the inner walls of the coaming, arc-shaped baffles are fixedly sleeved on the outer surfaces of the two ends of the rotating rods respectively, a pressing rod is fixedly connected between the lower ends of the two arc-shaped baffles, the present application has the diameter changing function, the changing process is convenient and fast, has the automatic cleaning function, prevents the problem of being stuck, prevents too many small coal blocks from being accumulated at the front end and sliding and falling off during the process of receiving coal blocks, grabs the coal blocks backward, assists the coal blocks in being stored on the collecting box, and is beneficial to the collection of small coal blocks.

Description

Technical Field

[0001] This invention relates to the field of coal mine screening technology, and in particular to a screen diameter changing device for particle vibrating screening. Background Technology

[0002] In green coal preparation systems, the screening process is a crucial step in achieving coal grading and preliminary separation of impurities. Its core objective is to classify coal by particle size through mechanical screening and remove some large pieces of gangue or debris, laying the foundation for subsequent sorting processes. Coal mine vibrating screens generally use vibrating motors for excitation. The screen box relies on two identical vibrating motors rotating synchronously in opposite directions, causing the entire screen supported on vibration dampers to vibrate linearly or along other specific trajectories. After the material enters, it rapidly advances, loosens, and passes through the screen under the action of vibration, thus completing the screening operation.

[0003] In existing technologies, vibration screening removes smaller coal particles, while larger coal lumps slide off the surface. These larger lumps can become stuck in the screening gaps, often requiring manual prying and removal, which is inconvenient. Furthermore, when the screening bars change diameter, the entire bar needs to be replaced manually, which is also quite inconvenient. Additionally, smaller coal lumps falling to the bottom tend to accumulate at the front, causing them to roll and fall, mixing with the larger lumps falling from above, further contributing to the problem. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a screen diameter changing device for particle vibrating screening.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a screen diameter changing device for particle vibrating screening, comprising a surrounding plate, a vibration mechanism provided on both sides of the surrounding plate, a plurality of screening bars fixedly installed on the inner side of the surrounding plate, a rotating bar provided between every two adjacent screening bars, a rotating rod and a rotating shaft fixedly connected to the front and rear ends of the plurality of rotating bars respectively, the two ends of the rotating shaft respectively rotatingly engaging with the inner wall of the surrounding plate, arc-shaped baffles fixedly sleeved at both ends of the outer surface of the rotating rod, a pressure rod fixedly connected at the lower end between two arc-shaped baffles, a plurality of actuating claws sleeved on the outer surface of the pressure rod through a tensioning mechanism, and a pulling mechanism provided between the two ends of the rotating rod and the surrounding plate respectively.

[0006] Preferably, the front and rear ends of several screening bars are respectively fixedly connected to a front fixing rod and a rear fixing rod, and the two ends of the front fixing rod and the rear fixing rod are respectively fixedly connected to the inner wall of the enclosure. This ensures the stable installation of the screening bars.

[0007] Preferably, the front and rear ends of the rotating bar are respectively fixedly connected to a front bent end and a rear bent end, the lower ends of several rear bent ends are jointly fixedly connected to the upper surface of the rotating shaft, and the lower ends of several front bent ends are jointly fixedly connected to the upper surface of the rotating rod. The design of the front and rear bent ends allows the rotating rod and the rotating shaft to avoid the end positions of the screening bar, preventing mutual interference.

[0008] Preferably, the tensioning mechanism includes a square block fixedly connected to the upper surface of the pressure rod. A circular hole is formed through the side surface of the actuating pawl. Several limiting teeth are fixedly connected to the inner wall of the circular hole. The pressure rod passes through the inner side of the circular hole. Limiting discs are fixedly fitted onto the outer surface of the pressure rod, near both sides of the actuating pawl. An insert block is slidably inserted into the outer surface of the square block, located inside the circular hole, via an elastic mechanism. Several end teeth are fixedly connected to the upper surface of the insert block, and these end teeth mesh with the limiting teeth. The limiting discs serve a restrictive function, preventing the actuating pawl from sliding along the surface of the pressure rod and limiting its rotation to relative to the pressure rod.

[0009] Preferably, the elastic mechanism includes protrusions fixedly connected to the front and rear surfaces of the insert block, a plurality of compression springs fixedly connected to the lower surface of the protrusions, the lower ends of the compression springs fixedly connected to the inner bottom surface of the square block, and a limit block slidably inserted into the inner side of the pressure rod through a positioning mechanism, the upper surface of the limit block having a reserved groove. When the insert block is compressed, the protrusions will compress the compression springs, and the lower end of the insert block will insert into the reserved groove.

[0010] Preferably, the positioning mechanism includes an adjusting plate fixedly connected to one end of the limiting block. An adjusting rod is threaded through one side surface of the adjusting plate. One end of the adjusting rod is rotatably connected to the side end face of the square block, and the other end of the adjusting rod is fixedly connected to an end head. A polygonal groove is formed on one side surface of the end head. The polygonal groove facilitates the user's rotation of the adjusting rod using tools.

[0011] Preferably, the vibration mechanism includes a base plate disposed below the enclosure panel. A baffle is fixedly connected to the upper surface of the base plate near the inner wall of the enclosure panel, and the baffle slides vertically with the enclosure panel. Support plates are fixedly connected to both sides of the upper surface of the base plate. A connecting beam is fixedly connected to the rear surface of the enclosure panel. Side plates are fixedly connected to both sides of the connecting beam. A plurality of vibration springs are fixedly connected between the upper end of the support plate and the side surface of the side plate. A vibration motor is fixedly installed at the upper end of the side surface of the side plate. A collection box is slidably disposed on the upper surface of the base plate between the two baffles. The connecting beam is used to increase the stability between the enclosure panel and the side plates. The collection box is used to collect smaller coal chunks and particles for convenient extraction and centralized collection and processing later.

[0012] Preferably, the pulling mechanism includes a telescopic rod rotatably connected to the side surface of the enclosure plate via a connecting shaft. The telescopic ends of the telescopic rod are rotatably sleeved on both ends of the outer surface of the rotating rod, and the telescopic rod is located between the enclosure plate and the side plate. The enclosure plate and the arc-shaped baffle can provide protection, preventing coal blocks from directly impacting the surface of the telescopic rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. When the rotating bar of the present invention rotates upward, it can achieve a change in screening diameter. At this time, the rotating bar and the screening bar are arranged side by side in sequence to form a screening state with a higher mesh size. It has a change in diameter function and the change process is convenient and quick.

[0015] 2. In the screening process, some stones get stuck between adjacent screening bars. When screening stops, the telescopic rod is retracted to make the rotating bar rotate upward. When the rotating bar rotates upward, the coal stones stuck between the adjacent screening bars are squeezed out. Then, the coal stones slide forward and downward along the surface of the screening bar and the rotating bar. It has an automatic cleaning function to prevent the jamming problem.

[0016] 3. When the rotating bar of the present invention rotates downward around the rotating shaft, several actuating claws will grab the coal blocks on the collection box backward, preventing too many smaller coal blocks from accumulating at the front end and slipping out during the coal block receiving process. Grabbing the coal blocks backward helps to store the coal blocks on the collection box, which is beneficial to the collection of smaller coal blocks. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a screen diameter changing device for particle vibrating screening according to the present invention.

[0018] Figure 2 This is a schematic diagram from another perspective of a screen diameter changing device for particle vibrating screening according to the present invention.

[0019] Figure 3 This is a partial cross-sectional view of a screen diameter changing device for particle vibrating screening according to the present invention.

[0020] Figure 4 This invention relates to a screen diameter changing device for particle vibrating screening. Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This invention relates to a screen diameter changing device for particle vibrating screening. Figure 4 Enlarged view at point B in the middle;

[0022] Figure 6 This is a cross-sectional view of the actuating claw of a screen diameter changing device for particle vibrating screening according to the present invention.

[0023] Figure 7 This is a schematic diagram of the screening bar of a screen diameter changing device for particle vibrating screening according to the present invention;

[0024] Figure 8 This is a schematic diagram of the rotating bar of a screen diameter changing device for particle vibrating screening according to the present invention.

[0025] Figure 9 This is a partial schematic diagram of the pressure bar of a screen diameter changing device for particle vibrating sieving according to the present invention.

[0026] The components are as follows: 1. Enclosure; 2. Vibrating motor; 3. Screening bar; 4. Rear fixing rod; 5. Front fixing rod; 6. Rotating bar; 7. Rear bent end; 8. Rotating shaft; 9. Front bent end; 10. Rotating rod; 11. Arc-shaped baffle; 12. Telescopic rod; 13. Connecting shaft; 14. Pressure rod; 15. Square block; 16. Limiting block; 17. Adjusting plate; 18. Adjusting rod; 19. End; 20. Multi-angled groove; 21. Reserved groove; 22. Insert block; 23. Protruding strip; 24. Compression spring; 25. Actuating claw; 26. Limiting plate; 27. Round hole; 28. Limiting tooth; 29. ​​End tooth; 30. Side plate; 31. Connecting beam; 32. Vibrating spring; 33. Baffle; 34. Support plate; 35. Base plate; 36. Collection box. Detailed Implementation

[0027] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0028] like Figures 1-9 The screen diameter changing device for particle vibrating screening shown includes a surrounding plate 1. Vibration mechanisms are provided on both sides of the surrounding plate 1. Several screening bars 3 are fixedly installed on the inner side of the surrounding plate 1. A rotating bar 6 is provided between every two adjacent screening bars 3. The front and rear ends of the several rotating bars 6 are respectively fixedly connected to a rotating rod 10 and a rotating shaft 8. The two ends of the rotating shaft 8 are respectively rotatably engaged with the inner wall of the surrounding plate 1. Arc-shaped baffles 11 are fixedly sleeved on both ends of the outer surface of the rotating rod 10. A pressure rod 14 is fixedly connected at the lower end between two arc-shaped baffles 11. Several actuating claws 25 are sleeved on the outer surface of the pressure rod 14 through a tensioning mechanism. Pulling mechanisms are respectively provided between the two ends of the rotating rod 10 and the surrounding plate 1.

[0029] like Figure 1 , Figure 7 As shown, the front and rear ends of several screening bars 3 are respectively fixedly connected to a front fixing rod 5 and a rear fixing rod 4, and the two ends of the front fixing rod 5 and the rear fixing rod 4 are respectively fixedly connected to the inner wall of the enclosure 1. This ensures the stable installation of the screening bars 3.

[0030] like Figure 1 , Figure 8 As shown, the front and rear ends of the rotating bar 6 are fixedly connected to a front bent end 9 and a rear bent end 7, respectively. The lower ends of several rear bent ends 7 are fixedly connected to the upper surface of the rotating shaft 8, and the lower ends of several front bent ends 9 are fixedly connected to the upper surface of the rotating rod 10. The design of the front bent ends 9 and the rear bent ends 7 allows the rotating rod 10 and the rotating shaft 8 to avoid the end positions of the screening bar 3, preventing mutual interference.

[0031] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the tensioning mechanism includes a square block 15 fixedly connected to the upper surface of the pressure rod 14. A circular hole 27 is provided through the side surface of the actuating pawl 25. Several limiting teeth 28 are fixedly connected to the inner wall of the circular hole 27. The pressure rod 14 passes through the inner side of the circular hole 27. Limiting discs 26 are fixedly sleeved on the outer surface of the pressure rod 14 and on both sides near the actuating pawl 25. An insert block 22 is slidably inserted into the outer surface of the square block 15 and located inside the circular hole 27 through an elastic mechanism. Several end teeth 29 are fixedly connected to the upper surface of the insert block 22, and the end teeth 29 mesh with the limiting teeth 28. The limiting discs 26 play a limiting role, preventing the actuating pawl 25 from sliding along the surface of the pressure rod 14 and restricting the actuating pawl 25 to rotate only relative to the pressure rod 14.

[0032] The elastic mechanism includes protruding strips 23 fixedly connected to the front and rear surfaces of the insert block 22, respectively. Several compression springs 24 are fixedly connected to the lower surface of the protruding strips 23. The lower ends of the compression springs 24 are fixedly connected to the inner bottom surface of the square block 15. A limiting block 16 is slidably inserted into the inner side of the pressure rod 14 through a positioning mechanism. A reserved groove 21 is provided on the upper surface of the limiting block 16. When the insert block 22 is compressed, the protruding strips 23 will compress the compression springs 24, and the lower end of the insert block 22 will insert into the inner side of the reserved groove 21.

[0033] like Figure 6 , Figure 9 As shown, the positioning mechanism includes an adjusting plate 17 fixedly connected to one end of the limiting block 16. An adjusting rod 18 is threaded through one side surface of the adjusting plate 17. One end of the adjusting rod 18 is rotatably connected to the side end face of the square block 15, and the other end of the adjusting rod 18 is fixedly connected to an end head 19. A polygonal groove 20 is formed on one side end face of the end head 19. The polygonal groove 20 facilitates the user to rotate the adjusting rod 18 with tools.

[0034] like Figure 1 , Figure 2As shown, the vibration mechanism includes a base plate 35 located below the enclosure 1. A baffle 33 is fixedly connected to the upper surface of the base plate 35 near the inner wall of the enclosure 1, and the baffle 33 slides vertically with the enclosure 1. Support plates 34 are fixedly connected to both sides of the upper surface of the base plate 35. A connecting beam 31 is fixedly connected to the rear surface of the enclosure 1. Side plates 30 are fixedly connected to both sides of the connecting beam 31. Several vibration springs 32 are fixedly connected between the upper end of the support plate 34 and the side surface of the side plate 30. A vibration motor 2 is fixedly installed at the upper end of the side surface of the side plate 30. A collection box 36 is slidably disposed on the upper surface of the base plate 35 between the two baffles 33. The connecting beam 31 is used to increase the stability between the enclosure 1 and the side plate 30. The collection box 36 is used to collect smaller coal pieces and particles for easy extraction and centralized collection and processing later.

[0035] like Figure 1 , Figure 8 As shown, the pulling mechanism includes a telescopic rod 12 rotatably connected to the side surface of the enclosure 1 via a connecting shaft 13. The telescopic ends of the telescopic rod 12 are rotatably sleeved on both ends of the outer surface of the rotating rod 10. The telescopic rod 12 is located between the enclosure 1 and the side plate 30. The enclosure 1 and the arc-shaped baffle 11 can provide protection to prevent coal blocks from directly impacting the surface of the telescopic rod 12.

[0036] During the extension of the telescopic rod 12, since the upper end of the telescopic rod 12 rotates around the connecting shaft 13, the lower end of the telescopic rod 12 rotates relative to the rotating rod 10, so there will be no jamming problem. The rotating rod 10 rotates downward around the rotating shaft 8, and the rotating bar 6 disengages from between the screening bars 3. Then, the coal blocks are poured in, and the coal blocks are screened by passing through the surface of the screening bars 3. The vibrating motor 2 runs and generates vibration. With the action of the shaking spring 32, the surrounding plate 1 moves up and down back and forth. The vibrating screening bars 3 screen the coal blocks. Larger coal blocks slide along the surface, while smaller coal blocks and particles fall into the collection box 36 below.

[0037] During screening, some stones get stuck between adjacent screening bars 3. When screening stops, the telescopic rod 12 is retracted, causing the rotating rod 10 to rotate upward. When the rotating bar 6 rotates upward, the coal stones stuck between adjacent screening bars 3 are squeezed out. Afterward, the coal stones slide forward and downward along the surfaces of the screening bars 3 and the rotating bar 6. It has an automatic cleaning function to prevent the problem of getting stuck.

[0038] When the rotating bar 6 rotates upward, the screening diameter can be changed. At this time, the rotating bar 6 and the screening bar 3 are arranged side by side to form a screening state with a higher mesh size. It has a diameter change function and the change process is convenient and quick.

[0039] When the rotating bar 6 rotates downward about the rotating shaft 8, several actuating claws 25 will grab the coal blocks on the collection box 36 backward to prevent too many smaller coal blocks from accumulating at the front end and slipping out during the coal block receiving process. Grabbing the coal blocks backward helps to store them on the collection box 36, which is beneficial for the collection of smaller coal blocks.

[0040] When the actuating pawl 25 needs to be rotated and adjusted, the adjusting rod 18 is rotated so that the side of the adjusting plate 17 is against the end 19. After the reserved groove 21 is located below the insert block 22, the user rotates the actuating pawl 25. The limiting tooth 28 pushes the end tooth 29. During this process, the insert block 22 will move downwards relatively, and the protrusion 23 pushes the compression spring 24. The lower end of the insert block 22 is inserted into the inner side of the reserved groove 21 without jamming. The user rotates the adjusting rod 18 so that the adjusting plate 17 moves along the surface of the adjusting rod 18. The limiting block 16 moves laterally, causing the reserved groove 21 to move laterally and no longer be located below the insert block 22. At this time, the upper end of the insert block 22 will not move downwards when pushed, thus achieving the limiting effect and positioning the actuating pawl 25 after the angle adjustment. After the angle of the actuating pawl 25 is adjusted, the degree of gripping the coal block when the rotating rod 10 is rotated downwards can be changed to adjust the amount of coal block gripped backwards, thereby reducing the resistance burden during gripping.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A screen diameter changing device for particle vibrating screening, comprising a surrounding plate (1), characterized in that: Vibration mechanisms are provided on both sides of the enclosure (1). Several screening strips (3) are fixedly installed on the inner side of the enclosure (1). A rotating strip (6) is provided between every two adjacent screening strips (3). The front and rear ends of several rotating strips (6) are respectively fixedly connected to a rotating rod (10) and a rotating shaft (8). The two ends of the rotating shaft (8) are respectively rotatably engaged with the inner wall of the enclosure (1). Arc-shaped baffles (11) are fixedly sleeved on both ends of the outer surface of the rotating rod (10). A pressure rod (14) is fixedly connected at the lower end between the two arc-shaped baffles (11). Several actuating claws (25) are sleeved on the outer surface of the pressure rod (14) through a tensioning mechanism. A pulling mechanism is provided between the two ends of the rotating rod (10) and the enclosure (1). The tensioning mechanism includes a square block (15) fixedly connected to the upper surface of the pressure rod (14), a circular hole (27) is opened through the side surface of the actuating claw (25), a number of limiting teeth (28) are fixedly connected to the inner wall of the circular hole (27), the pressure rod (14) passes through the inner side of the circular hole (27), and limiting discs (26) are fixedly sleeved on the outer surface of the pressure rod (14) and on both sides near the actuating claw (25). A plug block (22) is slidably inserted into the outer surface of the square block (15) and located inside the circular hole (27) through an elastic mechanism. A number of end teeth (29) are fixedly connected to the upper surface of the plug block (22), and the end teeth (29) mesh with the limiting teeth (28). The elastic mechanism includes protrusions (23) fixedly connected to the front and rear surfaces of the insert block (22), and a number of compression springs (24) fixedly connected to the lower surface of the protrusions (23). The lower end of the compression springs (24) is fixedly connected to the inner bottom surface of the square block (15). The inner side of the pressure rod (14) is slidably inserted with a limiting block (16) through a positioning mechanism. The upper surface of the limiting block (16) is provided with a reserved groove (21). The positioning mechanism includes an adjusting plate (17) fixedly connected to one end of the limiting block (16). An adjusting rod (18) is threaded through one side surface of the adjusting plate (17). One end of the adjusting rod (18) is rotatably connected to the side end face of the square block (15). The other end of the adjusting rod (18) is fixedly connected to an end head (19). A polygonal groove (20) is formed on one side end face of the end head (19).

2. The screen diameter changing device for particle vibrating screening according to claim 1, characterized in that: The front and rear ends of several screening bars (3) are respectively fixedly connected to a front fixing rod (5) and a rear fixing rod (4), and the two ends of the front fixing rod (5) and the rear fixing rod (4) are respectively fixedly connected to the inner wall of the enclosure (1).

3. The screen diameter changing device for particle vibrating screening according to claim 1, characterized in that: The front and rear ends of the rotating bar (6) are respectively fixedly connected to a front bent end (9) and a rear bent end (7). The lower ends of several rear bent ends (7) are fixedly connected to the upper surface of the rotating shaft (8), and the lower ends of several front bent ends (9) are fixedly connected to the upper surface of the rotating rod (10).

4. The screen diameter changing device for particle vibrating screening according to claim 1, characterized in that: The vibration mechanism includes a base plate (35) disposed below the enclosure (1). A baffle (33) is fixedly connected to the upper surface of the base plate (35) near the inner wall of the enclosure (1), and the baffle (33) slides vertically with the enclosure (1). Support plates (34) are fixedly connected to both sides of the upper surface of the base plate (35). A connecting beam (31) is fixedly connected to the rear surface of the enclosure (1). Side plates (30) are fixedly connected to both sides of the connecting beam (31). Several shaking springs (32) are fixedly connected between the upper end of the support plate (34) and the side surface of the side plate (30). A vibration motor (2) is fixedly installed at the upper end of the side surface of the side plate (30). A collection box (36) is slidably disposed on the upper surface of the base plate (35) between the two baffles (33).

5. A screen diameter changing device for particle vibrating screening according to claim 4, characterized in that: The pulling mechanism includes a telescopic rod (12) rotatably connected to the side surface of the enclosure (1) via a connecting shaft (13). The telescopic ends of the telescopic rod (12) are rotatably sleeved on both ends of the outer surface of the rotating rod (10). The telescopic rod (12) is located between the enclosure (1) and the side plate (30).

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