A screening device for multi-stage filtration of soil materials

Abstract

The present invention relates to the technical field of soil material filtering and screening, and in particular to a screening device for multi-stage filtering of soil material, comprising a screening box, a screening cylinder for filtering and screening the soil material is arranged inside the screening box, a first screening disc for primary screening of the soil material is movably arranged at the top of the screening cylinder, a second screening disc for multi-stage screening of the soil material is movably arranged at the bottom of the screening cylinder, a fixing cylinder for driving the first screening disc and the second screening disc to perform twisting and rotating motion is connected at the center of the screening cylinder through a supporting plate, the soil material on the first screening disc of the present invention can perform reciprocating motion and can be turned over by centrifugal friction, the soil material turns over while moving left and right in the first screening disc, thereby improving the screening effect of the soil material, and the soil material is broken up by a swinging arc-shaped breaking plate during the twisting, thereby stably and effectively improving the screening efficiency, and the first screening disc and the breaking rod form a cross-cross motion in the same plane, thereby ingeniously integrating the breaking up of the soil material with the screening of the soil material.

Description

Technical Field

[0001] The present invention relates to the technical field of soil filtering and screening, and in particular to a screening device for multi-stage filtering of soil materials. Background Art

[0002] Soil filtering and screening is a process of classifying soil materials by particle size or removing impurities through physical means, which is commonly used in fields such as soil treatment, building material preparation, and environmental restoration. Its core purpose is to separate the mixed soil materials into components with different particle sizes through a screening device, or to screen out particles that meet specific engineering requirements. By using the difference in the aperture of the sieve mesh, particles smaller than the aperture pass through the sieve surface, while particles larger than the aperture remain on the sieve surface.

[0003] Currently, the existing soil screening devices mainly use a filter sieve mesh in cooperation with a driving structure to achieve reciprocating motion. The soil materials are poured onto the filter sieve mesh and filtered and screened in the holes of the sieve mesh by vibration or reciprocating motion. The reciprocating motion of the filter sieve mesh is also fixed within a certain range, and the reciprocating motion is relatively regular. This will cause the soil materials on the sieve mesh to form a layered phenomenon. Smaller particle soil materials are doped between larger soil materials, and two larger soil materials will combine together during the horizontal reciprocating motion, making it impossible to screen out the smaller soil materials in the gaps. That is, it is difficult for the larger particles to flip during the reciprocating screening process, and the smaller particles clamped between the tops cannot be screened out, resulting in non-detailed screening of the soil materials, causing partial waste of the soil materials. Moreover, the initially screened soil materials are not dispersed, so the agglomerated soil materials will further dope the fine soil materials, and the agglomerated soil materials are not screened and are directly wasted and discharged, resulting in waste of soil resources. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a screening device for multi-stage filtering of soil materials.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: It includes a screening box, inside which there is a screening cylinder for filtering and screening soil materials. At the top inside the screening cylinder, there is a first screening plate that is movably arranged for primary screening of soil materials. At the bottom inside the screening cylinder, there is a second screening plate that is movably arranged for multi-stage screening of soil materials. At the center inside the screening cylinder, there is a fixed cylinder connected by a support plate to drive the first screening plate and the second screening plate to perform torsional rotational motion. Inside the fixed cylinder, there is a torsion assembly;

[0006] The twisting assembly includes a twisting frame that moves inside the fixed cylinder. Inside the twisting frame, an adapter block is movably connected through an adapter plate. The adapter block is movably connected to a twisting rotating rod. Both ends of the twisting rotating rod are movably connected to rotating swing arms. The bottom of the twisting frame is connected to a rotating column that drives the second screening plate to move through a rotating disk. The fixed cylinder is movably connected to a driving rotating shaft that drives the rotating swing arms to move. The top of the twisting frame drives the first screening plate to move through a connecting column.

[0007] At the inner top of the first screening plate, a dispersing rod for dispersing soil materials is movably arranged. Inside the screening box, a dispersing assembly for driving the dispersing rod to move is provided. The dispersing assembly includes a U-shaped fixing plate fixedly installed inside the screening box. The U-shaped fixing plate is movably connected to a loop-shaped swing arm through a fixed rotating shaft. The loop-shaped swing arm is movably connected to a T-shaped connecting rod. The dispersing rod is fixedly installed on the loop-shaped swing arm.

[0008] The bottom of the screening box is fixedly installed with a vibration box. Inside the vibration box, a vibration assembly for performing intermittent vibration movement on the second screening plate is provided.

[0009] As a preferred technical solution of the present invention, on one side of the top of the vibration box outside the screening box, a motor box is fixedly installed through bolts. Inside the motor box, a driving motor is fixedly installed through bolts. The driving rotating shaft penetrates through the screening cylinder and the screening box and is connected to the output end of the driving motor. On the side of the rotating swing arm far from the motor box, it is movably installed on the inner wall of the screening cylinder through a driven rotating shaft.

[0010] T-shaped sliding grooves are opened at the upper and lower ends of the inner wall of the screening cylinder. T-shaped sliding rings that are matched and fitted with the T-shaped sliding grooves are fixedly installed on the outer circumferences of the first screening plate and the second screening plate. And the T-shaped sliding rings move inside the T-shaped sliding grooves. First filtering holes are opened at the inner bottom of the first screening plate. Second filtering holes are opened at the inner bottom of the second screening plate. The top of the screening cylinder is fixedly installed with a support frame with a discharge hopper through bolts. And the discharge hopper is located at the center of the bottom of the screening cylinder. A slag outlet with a sealing plug is opened at the bottom of the second screening plate.

[0011] As a preferred technical solution of the present invention, a first bevel gear is fixedly installed on the driving rotating shaft inside the screening box. Inside the screening box, a first rotating rod is connected to the top side of the driving rotating shaft through a first support plate. Inside the screening box, a second rotating rod is connected to the bottom side of the driving rotating shaft through a second support plate. Second bevel gears that are movably meshed with the first bevel gear are installed on both the first rotating rod and the second rotating rod.

[0012] The dispersing component further includes a dispersing disk that moves within the U-shaped fixing plate, and the T-shaped connecting rod moves on the dispersing disk. A support rotating shaft is fixedly installed at the center of the side of the dispersing disk away from the fixed rotating shaft. The support rotating shaft movably penetrates through the U-shaped fixing plate and is connected to a third bevel gear. A fourth bevel gear that meshes with the third bevel gear is installed at the top of the first rotating rod.

[0013] As a preferred technical solution of the present invention, the dispersing rod is installed on the side of the loop-shaped swing arm away from the support rotating shaft. The screening box and the screening cylinder are provided with dispersing grooves that match the size of the dispersing rod, and the dispersing rod moves within the dispersing grooves. A number of dispersing support rods are evenly installed at the top of the first screening plate of the dispersing rod. An arc-shaped dispersing plate for mixing and dispersing the soil material is fixedly installed at the bottom of the dispersing support rod through bolts, and the lengths of the arc-shaped dispersing plates are different.

[0014] A circular base ring is fixedly installed at the inner bottom of the fixed cylinder through bolts. A fixed sliding groove is provided at the top of the circular base ring. A fixed slider is slidably connected within the fixed sliding groove of the circular base ring. The top end of the fixed slider is connected to the bottom of the rotating disk. A rotating column is fixedly installed at the center of the bottom of the rotating disk, and the rotating column moves within a fixed hole provided at the bottom of the fixed cylinder. The periphery of the bottom of the rotating column is connected to the inner wall of the second screening plate through an arc-shaped rod.

[0015] As a preferred technical solution of the present invention, a rotating cam that moves within the vibration box is fixedly installed at the bottom of the second rotating rod through bolts. The vibration component further includes a U-shaped moving plate that moves within the vibration box. A triangular support block is fixedly installed on the outside of the screening cylinder near the screening box through bolts. A telescopic spring is fixedly installed on the triangular support block. The top of the telescopic spring is fixedly installed with the U-shaped moving plate, and the rotating cam and the U-shaped moving plate are movably abutted against each other.

[0016] A moving plate is fixedly installed at the center of the bottom of the U-shaped moving plate through bolts. A moving rod with an arc-shaped vibration block is fixedly installed at the center of the side of the moving plate near the screening cylinder through bolts. The screening cylinder is provided with a moving hole that matches the size of the moving rod, and the moving rod movably penetrates through the moving hole. The arc-shaped vibration block is movably abutted against the side of the second screening plate.

[0017] Compared with the prior art, the beneficial effects that the present invention can achieve are:

[0018] 1. The first screening plate and the second screening plate are driven by a twisting frame to perform reciprocating twisting and filtering screening. The twisting screening can make the soil material on the first screening plate perform reciprocating motion, and at the same time, the centrifugal friction between the soil material and the first screening plate during the rotation causes the soil material to turn over. The soil material moves left and right in the first screening plate while turning over itself, greatly improving the screening effect of the soil material. During the twisting, the swinging arc-shaped dispersing plate is used to disperse the soil material, stably and effectively improving the screening efficiency. Moreover, the first screening plate and the dispersing rod form a cross movement in the same plane, cleverly integrating the dispersion of the soil material and the screening of the soil material, improving the fineness of the screening of the soil material, and making the screening of the soil material more stable and sufficient.

[0019] 2. The disk-shaped structure of the first screening plate results in a small space stock for soil material filtration and screening, effectively improving the efficiency of primary screening. While the second screening plate has a basin-shaped structure, resulting in a large space stock for the soil material in secondary screening, enabling the fine soil material to stay in the second screening plate for a long time, and the filtration and screening being more thorough. Using screening equipment with different structures to achieve the screening effects of different levels, the design is ingenious.

[0020] 3. The dispersing rod that swings left and right with the fixed rotating shaft as the center is used to disperse the soil material in the first screening plate, effectively improving the screening effect of the first screening plate on the soil material. Through dispersion, not only can the agglomerated soil material be dispersed, but also it can collide with the moving soil material, preventing the doped impurities from adhering to the soil material and improving the filtration and screening effect of the soil material.

[0021] 4. The arc-shaped vibration block connected by the movable rod under the U-shaped motion plate performs intermittent knocking motion on the second screening plate, preventing the second filtering holes in the second screening plate from being blocked, and improving the screening efficiency of the second screening plate for fine soil material. Through the connection with the driving rotating shaft, the second screening plate twists and rotates while knocking and vibrating, making the screening of the second screening plate for the soil material more stable and smooth, and improving the screening efficiency of the soil material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the screening cylinder of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the screening box of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the fixed cylinder of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the discharge hopper of the present invention;

[0027] Figure 6Structural schematic diagram of the first screening plate of the present invention;

[0028] Figure 7 Structural schematic diagram of the second screening plate of the present invention;

[0029] Figure 8 Structural schematic diagram of the driving rotating shaft of the present invention;

[0030] Figure 9 Internal structural schematic diagram of the fixed cylinder of the present invention;

[0031] Figure 10 Structural schematic diagram of the twisting frame of the present invention;

[0032] Figure 11 Structural schematic diagram of the arc-shaped dispersing plate of the present invention;

[0033] Figure 12 Structural schematic diagram of the U-shaped fixing plate of the present invention;

[0034] Figure 13 Structural schematic diagram of the connection between the first screening plate and the second screening plate of the present invention;

[0035] Figure 14 Structural schematic diagram of the U-shaped moving plate of the present invention;

[0036] Figure 15 For the present invention Figure 10 Enlarged structural schematic diagram at position A in

[0037] Wherein: 10, screening box; 11, screening cylinder; 12, motor box; 13, driving motor; 14, support frame; 15, discharge hopper; 16, T-shaped chute; 17, T-shaped slip ring; 18, dispersing tank; 19, driving rotating shaft; 20, first screening plate; 21, connecting column; 22, first filtering holes; 30, second screening plate; 31, second filtering holes; 32, slag outlet; 40, fixed cylinder; 41, annular base ring; 42, fixed chute; 43, fixed slider; 44, rotating disk; 45, support plate; 50, twisting frame; 51, connecting plate; 52, connecting block; 53, twisting rotating rod; 54, rotating swing arm; 55, arc-shaped rod; 56, rotating column; 57, fixed holes; 58, driven rotating shaft; 60, dispersing rod; 61, U-shaped fixing plate; 62, loop-shaped swing arm; 63, fixed rotating shaft; 64, T-shaped connecting rod; 65, dispersing disk; 66, support rotating shaft; 67, third bevel gear; 68, dispersing support rod; 69, arc-shaped dispersing plate; 70, first bevel gear; 71, first support plate; 72, first rotating rod; 73, second support plate; 74, second rotating rod; 75, second bevel gear; 76, fourth bevel gear; 80, vibration box; 81, rotating cam; 82, U-shaped moving plate; 83, triangular support block; 84, telescopic spring; 85, movable plate; 86, arc-shaped vibration block; 87, movable rod; 88, movable holes. Detailed implementation manners

[0038] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0039] Embodiment: As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14As shown in the figure, it includes a screening box 10. Inside the screening box 10, there is a screening cylinder 11 for filtering and screening soil materials. At the top inside the screening cylinder 11, there is a first screening plate 20 that conducts primary screening on the soil materials. At the bottom inside the screening cylinder 11, there is a second screening plate 30 that conducts multi-stage screening on the soil materials, and the second screening plate 30 is in a basin-like structure. At the center inside the screening cylinder 11, there is a fixed cylinder 40 connected by a support plate 45 to drive the first screening plate 20 and the second screening plate 30 to perform a twisting and rotating motion. Inside the fixed cylinder 40, there is a twisting component;

[0040] The twisting component includes a twisting frame 50 that moves inside the fixed cylinder 40. Inside the twisting frame 50, there is an engagement block 52 movably connected through an engagement plate 51. The engagement block 52 is movably connected to a twisting rotating rod 53. At both ends of the twisting rotating rod 53, there are rotating swing arms 54. At the bottom of the twisting frame 50, there is a rotating column 56 connected by a rotating disk 44 to drive the movement of the second screening plate 30. The fixed cylinder 40 is movably connected to a driving rotating shaft 19 that drives the rotating swing arm 54 to move. At the top of the twisting frame 50, the first screening plate 20 is driven to move through a connecting column 21;

[0041] At the top inside the first screening plate 20, there is a dispersing rod 60 for dispersing the soil materials. Inside the screening box 10, there is a dispersing component for driving the dispersing rod 60 to move, and the dispersing component includes a U-shaped fixing plate 61 fixedly installed inside the screening box 10. The U-shaped fixing plate 61 is movably connected through a fixed rotating shaft 63 to a loop-shaped swing arm 62. The loop-shaped swing arm 62 is movably connected to a T-shaped connecting rod 64, and the loop-shaped swing arm 62 is fixedly installed with the dispersing rod 60;

[0042] At the bottom of the screening box 10, there is a vibration box 80 fixedly installed. Inside the vibration box 80, there is a vibration component for performing intermittent vibration movement on the second screening plate 30.

[0043] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 13, on the top side of the outer side of the screening box 10 and at one side of the vibration box 80, a motor box 12 is fixedly installed by bolts. Inside the motor box 12, a driving motor 13 is fixedly installed by bolts. The driving shaft 19 passes through the screening cylinder 11 and the screening box 10 and is connected to the output end of the driving motor 13. The driving motor 13 in the motor box 12 drives the driving shaft 19 to rotate. The driving shaft 19 drives the rotating swing arm 54 to perform synchronous rotational motion. The rotating swing arm 54 on the side far from the motor box 12 is movably installed on the inner wall of the screening cylinder 11 through the driven shaft 58, so that the rotating swing arms 54 at both ends of the twisting rod 53 obtain stable rotational motion. The twisting rod 53 cooperates with the connecting plate 51 and the connecting block 52 to complete the reciprocating twisting effect on the twisting frame 50.

[0044] T-shaped sliding grooves 16 are opened at the upper and lower ends of the inner wall of the screening cylinder 11. T-shaped sliding rings 17 that are matched with the T-shaped sliding grooves 16 are fixedly installed on the outer peripheries of the first screening plate 20 and the second screening plate 30, and the T-shaped sliding rings 17 are movably arranged in the T-shaped sliding grooves 16. The first screening plate 20 and the second screening plate 30 are rotationally supported in the screening cylinder 11 and are driven to rotate by the internal twisting frame 50. First filtering holes 22 are opened at the inner bottom of the first screening plate 20, and second filtering holes 31 are opened at the inner bottom of the second screening plate 30. The diameter of the second filtering holes 31 is smaller than the diameter of the first filtering holes 22, so as to realize multi-stage effective filtering and screening of the soil material. A support frame 14 with a discharge hopper 15 is fixedly installed at the top of the screening cylinder 11 by bolts, and the discharge hopper 15 is located at the center of the bottom of the screening cylinder 11. A slag outlet 32 with a sealing plug is opened at the bottom of the second screening plate 30, and the soil material that is not filtered out in the second screening plate 30 is centrally taken out by opening the slag outlet 32.

[0045] Refer to Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 11 and Figure 12 , a first bevel gear 70 is fixedly installed on the driving shaft 19 in the screening box 10. In the screening box 10, a first rotating rod 72 is connected to one side of the top of the driving shaft 19 through a first support plate 71, and a second rotating rod 74 is connected to one side of the bottom of the driving shaft 19 through a second support plate 73. Second bevel gears 75 that are movably meshed with the first bevel gear 70 are installed on the first rotating rod 72 and the second rotating rod 74. The first rotating rod 72 and the second rotating rod 74 on the first support plate 71 and the second support plate 73 are respectively driven to rotate synchronously through the meshing of the first bevel gear 70 on the driving shaft 19 and the second bevel gears 75.

[0046] The crushing component further includes a crushing disc 65 that moves within the U-shaped fixing plate 61, and the T-shaped connecting rod 64 moves on the crushing disc 65. At the center of the side of the crushing disc 65 away from the fixed rotating shaft 63, a support rotating shaft 66 is fixedly installed. The support rotating shaft 66 movably passes through the U-shaped fixing plate 61 and is connected with a third bevel gear 67. At the top of the first rotating rod 72, a fourth bevel gear 76 that meshes with the third bevel gear 67 is installed. By using the driving rotating rod to cooperate with multiple groups of bevel gears, the support rotating shaft 66 is driven to rotate. The support rotating shaft 66 drives the crushing disc 65 to move. During the rotation of the crushing disc 65, the T-shaped connecting rod 64 moves up and down in the loop-shaped swing arm 62. When the T-shaped connecting rod 64 moves to the middle of the loop-shaped swing arm 62, the T-shaped connecting rod 64 will drive the loop-shaped swing arm 62 on the fixed rotating shaft 63 to form an included angle state with the U-shaped fixing plate 61, thus driving the loop-shaped swing arm 62 to produce a reciprocating swinging effect on the U-shaped fixing plate 61, driving the arc-shaped crushing plate 69 under the crushing rod 60 to swing and crush the soil material on the first screening disc 20.

[0047] Refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 14 and Figure 15 The crushing rod 60 is installed on the side of the loop-shaped swing arm 62 away from the support rotating shaft 66. The screening box 10 and the screening cylinder 11 are provided with crushing grooves 18 that match the size of the crushing rod 60, and the crushing rod 60 moves within the crushing grooves 18. A number of crushing support rods 68 are evenly installed at the top of the first screening disc 20 on the crushing rod 60. At the bottom of the crushing support rods 68, an arc-shaped crushing plate 69 for mixing and crushing the soil material is fixedly installed by bolts, and the lengths of the arc-shaped crushing plates 69 are different. By means of the arc-shaped crushing plates 69, the crushing efficiency of the soil material on the first screening disc 20 is improved, and the crushing contact area of the soil material is enlarged.

[0048] The inner bottom of the fixed cylinder 40 is fixedly installed with an annular base ring 41 through bolts. A fixed sliding groove 42 is opened at the top of the annular base ring 41. A fixed slider 43 is slidably connected in the fixed sliding groove 42 of the annular base ring 41. Through the annular base ring 41, the fixed sliding groove 42 and the fixed sliding groove 42, the twisting frame 50 on the rotating disk 44 makes a stable and smooth back-and-forth movement. The top end of the fixed slider 43 is connected to the bottom of the rotating disk 44. A rotating column 56 is fixedly installed at the center of the bottom of the rotating disk 44, and the rotating column 56 is movably located in the fixed hole 57 opened at the bottom of the fixed cylinder 40. The periphery of the bottom of the rotating column 56 is connected to the inner wall of the second screening disk 30 through an arc-shaped rod 55. The movement of the twisting frame 50 is used to drive the second screening disk 30 to perform synchronous movement, and the first screening disk 20 and the second screening disk 30 are used to complete the multi-stage filtration and screening of the soil material.

[0049] Refer to Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 14 , the bottom of the second rotating rod 74 is fixedly installed with a rotating cam 81 that is movably located inside the vibration box 80 through bolts. The vibration assembly further includes a U-shaped moving plate 82 that is movably located inside the vibration box 80. On the outside of the screening cylinder 11 and close to one side of the screening box 10, a triangular support block 83 is fixedly installed through bolts. The triangular support block 83 is fixedly installed with a telescopic spring 84. The top of the telescopic spring 84 is fixedly installed with a U-shaped moving plate 82 through bolts, and the rotating cam 81 and the U-shaped moving plate 82 are movably abutted against each other. During the abutment between the rotating cam 81 and the U-shaped moving plate 82, the telescopic spring 84 will enter a state of stretching and storing energy.

[0050] The center of the bottom of the U-shaped moving plate 82 is fixedly installed with a moving plate 85 through bolts. The center of the moving plate 85 close to the screening cylinder 11 is fixedly installed with a moving rod 87 with an arc-shaped vibration block 86 through bolts. The screening cylinder 11 is provided with a moving hole 88 that matches the size of the moving rod 87, and the moving rod 87 movably penetrates through the moving hole 88. The arc-shaped vibration block 86 is movably abutted against the side of the second screening disk 30. The telescopic spring 84 is used to drive the arc-shaped vibration block 86 on the moving rod 87 to perform intermittent vibration knocking on the side of the second screening disk 30 during the energy storage and reset process, preventing the second filtering holes 31 on the second screening disk 30 from being blocked, and greatly improving the filtration and screening efficiency of the soil material.

[0051] Working principle: Inject the soil material onto the first screening plate 20. The driving motor 13 inside the motor box 12 drives the active rotating shaft 19 to perform a rotational motion. The active rotating shaft 19 drives the rotating swing arm 54 to perform a rotational motion. During the swinging process of the rotating swing arm 54, the reciprocating torsion of the torsion frame 50 on the annular base ring 41 is carried out through the connecting plate 51, the connecting block 52 and the torsion rod 53. When the rotating swing arms 54 at both ends inside the fixed cylinder 40 are horizontal with the connecting plate 51, the rotating swing arm 54 connected to the active rotating shaft 19 is at the highest position. At this time, the torsion rod 53 and the connecting block 52 are in a crossed state with the torsion frame 50. When the rotating swing arm 54 moves to the horizontal state, it will cooperate with the connecting block 52 and the torsion rod 53 to rotate the torsion frame 50 to the side where the rotating swing arm 54 moves. When the rotating swing arm 54 moves to the lowest position, the torsion frame 50 resets again. In this way, the reciprocating torsion of the torsion frame is realized, and the rotating swing arm 54 at the other end of the torsion rod 53 completes the rotational support in cooperation with the driven rotating shaft 58;

[0052] When the torsion frame 50 is reciprocatingly twisted, the connecting column 21 on the top of the torsion frame 50 drives the first screening plate 20 to achieve synchronous rotational torsion under the action of the T-shaped sliding groove 16 and the T-shaped sliding ring 17. The torsion frame 50 drives the second screening plate 30 under the arc-shaped rod 55 through the rotating column 56 of the rotating disk 44 to synchronously achieve reciprocating torsion under the action of the T-shaped sliding groove 16 and the T-shaped sliding ring 17. The primary screening of the soil material is carried out through the first filtering holes 22 of the first screening plate 20, and the multi-stage filtering and screening of the soil material is carried out through the second filtering holes 31 of the second screening plate 30;

[0053] During the torsion screening, the first bevel gear 70 on the active rotating shaft 19 meshes with the second bevel gear 75 at the bottom of the first rotating rod 72 to move. The second bevel gear 75 synchronously drives the first rotating rod 72 on the first support plate 71 to perform a rotational motion. The first rotating rod 72 drives the third bevel gear 67 and the support rotating shaft 66 to perform synchronous rotational motion through meshing with the fourth bevel gear 76. During the rotation of the support rotating shaft 66, the dispersing disk 65 inside the U-shaped fixing plate 61 is driven to perform a rotational motion. During the rotation of the dispersing disk 65, it moves through the T-shaped connecting rod 64 in the loop-shaped swing arm 62, causing the loop-shaped swing arm 62 to move back and forth on the fixed rotating shaft 63. The loop-shaped swing arm 62 will drive the dispersing rod 60 to reciprocate in the dispersing groove 18. The dispersing rod 60 will drive the arc-shaped dispersing plate 69 to perform a reciprocating swinging motion inside the first screening plate 20 through the dispersing support rod 68. The soil material in the first screening plate 20 is dispersed and mixed through the arc-shaped dispersing plate 69, improving the screening efficiency of the first screening plate 20 for the soil material;

[0054] Meanwhile, during the reciprocating twisting of the twisting frame 50, the first bevel gear 70 on the driving rotating shaft 19 meshes with the second bevel gear 75 at the top of the second rotating rod 74 to move. The second bevel gear 75 synchronously drives the second rotating rod 74 on the second support plate 73 to perform a rotating motion. During the synchronous rotating motion of the second rotating rod 74, the rotating cam 81 in the vibration box 80 is driven to perform a rotating motion. When the rotating cam 81 moves to abut against the U-shaped moving plate 82, the U-shaped moving plate 82 causes the telescopic spring 84 on the triangular support block 83 to be stretched and store energy. When the rotating cam 81 disengages from abutting against the U-shaped moving plate 82, the reset of the telescopic spring 84 drives the moving plate 85 under the U-shaped moving plate 82 to move. The moving rod 87 on one side of the moving plate 85 moves synchronously, and the arc-shaped vibration block 86 connected to the moving rod 87 will intermittently strike and vibrate the second screening plate 30, effectively preventing the second filtering holes 31 in the second screening plate 30 from being blocked;

[0055] After the multi-stage screening of the soil material, the operator opens the slag discharge port 32 at the bottom of the second screening plate 30 through the discharge hopper 15 to centrally discharge the unfiltered soil particles, and the unfiltered soil residues on the first screening plate 20 are directly adsorbed and cleaned by an external dust suction device.

[0056] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art to which the present invention pertains.

Claims

1. A screening device for multi-stage filtration of soil materials, comprising a screening box, characterized in that: The screening box is provided with a screening cylinder for filtering and screening soil materials, a first screening disc for primary screening of soil materials is movably provided at the top of the screening cylinder, a second screening disc for multi-stage screening of soil materials is movably provided at the bottom of the screening cylinder, a fixed cylinder for driving the first screening disc and the second screening disc to perform twisting and rotating motion is connected at the center of the screening cylinder through a support plate, and a twisting assembly is provided inside the fixed cylinder; The twisting assembly includes a twisting frame movable inside the fixed cylinder, a connecting block is movably connected to the inside of the twisting frame through a connecting plate, a twisting rotating rod is movably connected to the connecting block, and rotating swing arms are movably connected to both ends of the twisting rotating rod. The bottom of the twisting frame is connected to a rotating column driving the second screening disk to move through a rotating disk, the fixed cylinder is movably connected to an active rotating shaft driving the rotating swing arm to move, and the top of the twisting frame drives the first screening disk to move through a connecting column; A scattering rod for scattering the soil material is movably arranged on the inner top of the first screening plate, a scattering assembly for driving the scattering rod to move is arranged inside the screening box, and the scattering assembly includes a U-shaped fixing plate fixedly installed inside the screening box, the U-shaped fixing plate is movably connected to a circular swing arm through a fixed rotating shaft, the circular swing arm is movably connected to a T-shaped connecting rod, and the circular swing arm is fixedly installed with the scattering rod; A vibration box is fixedly installed at the bottom of the screening box, and a vibration component for performing interval vibration motion on the second screening plate is arranged inside the vibration box; The scattering assembly also includes a scattering disk movable in the U-shaped fixed plate, and a T-shaped connecting rod movable on the scattering disk, a supporting shaft fixedly installed at the center of the scattering disk on the side away from the fixed shaft, a scattering rod installed on the side of the circular swing arm away from the supporting shaft, the screening box and the screening cylinder are provided with a scattering groove matching the size of the scattering rod, and the scattering rod moves in the scattering groove, a plurality of scattering support rods are evenly installed at the top of the first screening disk, and an arc-shaped scattering plate for mixing and scattering the soil material is fixed to the bottom of the scattering support rod by bolts, and the arc-shaped scattering plate has different lengths.

2. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: A motor box is fixedly installed on the outside of the screening box at the top side of the vibration box by bolts, and a driving motor is fixedly installed inside the motor box by bolts. The driving shaft passes through the screening cylinder and the screening box and is connected to the output end of the driving motor. The rotating swing arm on the side away from the motor box is movably installed on the inner wall of the screening cylinder through the driven shaft.

3. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: T-shaped slide grooves are provided at the upper and lower ends of the inner wall of the screening cylinder, and T-shaped slip rings matching the T-shaped slide grooves are fixedly installed on the outer peripheries of the first screening disc and the second screening disc, and the T-shaped slip rings move in the T-shaped slide grooves. A first filtering hole is provided at the bottom of the first screening disc, and a second filtering hole is provided at the bottom of the second screening disc. A support frame with a discharge hopper is fixedly installed on the top of the screening cylinder by bolts, and the discharge hopper is located at the bottom center of the screening cylinder, and a slag discharge port with a sealing plug is provided at the bottom of the second screening disc.

4. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: The active rotating shaft is fixedly installed with a first bevel gear in the screening box, and a first rotating rod is connected to the top side of the active rotating shaft in the screening box through a first support plate, and a second rotating rod is connected to the bottom side of the active rotating shaft in the screening box through a second support plate, and both the first rotating rod and the second rotating rod are installed with a second bevel gear that is movably meshed with the first bevel gear.

5. The screening device for multi-stage filtration of soil materials according to claim 4, characterized in that: The support shaft movably passes through the U-shaped fixing plate and is connected to a third bevel gear, and a fourth bevel gear movably meshed with the third bevel gear is installed on the top of the first rotating rod.

6. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: An annular base ring is fixedly installed on the inner bottom of the fixed cylinder by bolts, a fixed slide groove is opened on the top of the annular base ring, and the annular base ring is slidably connected with a fixed slider in the fixed slide groove, and the top of the fixed slider is connected to the bottom of the rotating disk. A rotating column is fixedly installed at the bottom center of the rotating disk, and the rotating column moves in a fixed hole opened on the bottom of the fixed cylinder, and the bottom of the rotating column is connected to the inner wall of the second screening disk by arc rods.

7. The screening device for multi-stage filtration of soil materials according to claim 4, characterized in that: A rotating cam movable inside the vibration box is fixedly installed at the bottom of the second rotating rod by bolts, and the vibration assembly also includes a U-shaped moving plate movable inside the vibration box. A triangular support block is fixedly installed at the outside of the screening cylinder on the side close to the screening box by bolts, and a telescopic spring is fixedly installed on the triangular support block. A U-shaped moving plate is fixedly installed on the top of the telescopic spring by bolts, and the rotating cam and the U-shaped moving plate are movable against each other.

8. The screening device for multi-stage filtration of soil materials according to claim 7, characterized in that: A movable plate is fixedly installed at the bottom center of the U-shaped moving plate by bolts, and a movable rod with an arc-shaped vibrating block is fixedly installed at the center of one side of the movable plate close to the screening cylinder by bolts, and the screening cylinder is provided with a movable hole that matches the size of the movable rod, the movable rod movably passes through the movable hole, and the arc-shaped vibrating block movably abuts against the side of the second screening disk.

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