Screening equipment for multistage filtering of soil materials

Abstract

The invention relates to the technical field of soil material filtering and screening, in particular to screening equipment for soil material multi-stage filtering, which comprises a screening box, a screening barrel for filtering and screening soil materials is arranged in the screening box, and a first screening disc for primarily screening the soil materials is movably arranged at the top in the screening barrel; a first screening disc for conducting multi-stage screening on soil materials is movably arranged at the bottom of the interior of the screening barrel, a second screening disc for conducting multi-stage screening on the soil materials is movably arranged at the bottom of the interior of the screening barrel, and a fixing barrel for driving the first screening disc and the second screening disc to conduct twisting and rotating motion is connected to the center of the interior of the screening barrel through a supporting plate. Soil materials turn over while moving left and right in the first screening disc, the screening effect of the soil materials is improved, the swinging arc-shaped scattering plate is used for scattering the soil materials in the twisting process, the screening efficiency is stably and effectively improved, the first screening disc and the scattering rods form cross movement in the same plane, and the screening efficiency is improved. Soil scattering and soil screening are ingeniously combined into a whole.

Description

Technical Field

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

[0002] Soil filtration and screening is a process of grading soil according to particle size or removing impurities through physical means. It is often used in soil treatment, construction material preparation, environmental remediation and other fields. Its core purpose is to separate mixed soil into components of different particle sizes through screening equipment, or to screen out particles that meet specific engineering needs. By utilizing the difference in the aperture size of the screen, particles smaller than the aperture can pass through the screen surface, while particles larger than the aperture remain on the screen surface.

[0003] At present, the existing soil screening equipment mainly utilizes the filter screen and the driving structure to realize reciprocating motion. The soil is poured onto the filter screen and filtered and screened in the screen holes by vibration or reciprocating motion. The reciprocating motion of the filter screen is also fixed within a certain range, and the reciprocating motion is more regular, which will cause the soil on the screen to be stratified. Smaller particles of soil are mixed between larger soil, and the two larger soils will combine together in the horizontal reciprocating motion, and the smaller soil in the gap cannot be screened out, that is, it is difficult for larger particles to flip during the reciprocating screening process, and the smaller particles clamped between the tops cannot be screened out. The soil screening is not meticulous, resulting in partial waste of soil, and the primary screened soil is not broken up, so that the clumped soil will be mixed with fine soil, and the clumped soil is not screened and is 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 filtration of soil materials.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a screening box, wherein a screening cylinder for filtering and screening soil materials is arranged inside the screening box, a first screening disc for primary screening of soil materials is movably arranged at the top of the screening cylinder, a second screening disc for multi-stage screening of soil materials is movably arranged 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 arranged inside the fixed cylinder; The twisting assembly includes a twisting frame movable inside the fixed cylinder, a connecting block movably connected to the inside of the twisting frame through a connecting plate, a twisting rotating rod movably connected to the connecting block, a rotating swing arm movably connected to both ends of the twisting rotating rod, a rotating column driving the second screening disk to move is connected to the bottom of the twisting frame through a rotating disk, an active rotating shaft driving the rotating swing arm to move is movably connected to the fixed cylinder, and the top of the twisting frame drives the first screening disk to move through a connecting column; A breaking rod for breaking up the soil material is movably arranged on the inner top of the first screening disc, and a breaking assembly for driving the breaking rod to move is arranged inside the screening box, and the breaking assembly includes a U-shaped fixing plate fixedly installed inside the screening box, and the U-shaped fixing plate is movably connected to a round-shaped swing arm through a fixed rotating shaft, and the round-shaped swing arm is movably connected to a T-shaped connecting rod, and the breaking rod is fixedly installed on the round-shaped swing arm; A vibration box is fixedly installed at the bottom of the screening box, and a vibration component for performing intermittent vibration motion on the second screening disc is arranged inside the vibration box.

[0006] As a preferred technical solution of the present invention, a motor box is fixedly installed on the top side of the vibration box on the outside of the screening box by bolts, a driving motor is fixedly installed on the inside of 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, and the rotating swing arm on the side away from the motor box is movably installed on the inner wall of the screening cylinder through a driven shaft.

[0007] T-shaped 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 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 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 outlet with a sealing plug is provided at the bottom of the second screening disc.

[0008] As a preferred technical solution of the present invention, 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 the first rotating rod and the second rotating rod are both equipped with a second bevel gear that is movably meshed with the first bevel gear.

[0009] The scattering assembly also includes a scattering disk movable in the U-shaped fixed plate, and the T-shaped connecting rod is movable on the scattering disk, and the scattering disk is fixedly installed with a supporting shaft at the center of a side away from the fixed shaft, and the supporting shaft movably passes through the U-shaped fixed 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.

[0010] As a preferred technical solution of the present invention, the breaking rod is 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 breaking groove matching the size of the breaking rod, and the breaking rod moves in the breaking groove, the breaking rod is evenly provided with a plurality of breaking support rods at the top of the first screening plate, and the bottom of the breaking support rod is fixed with an arc-shaped breaking plate for mixing and breaking the soil material by bolts, and the arc-shaped breaking plate has different lengths.

[0011] 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 a fixed slider is slidably connected to the annular base ring 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.

[0012] As a preferred technical solution of the present invention, a rotating cam movable inside the vibration box is fixedly installed on 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 on 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. The 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 movably opposed to each other.

[0013] 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 vibration 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 vibration block movably abuts against the side of the second screening disk.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. The first screening disc and the second screening disc are driven by the twisting frame to perform reciprocating twisting filtering and screening. The twisting screening can make the soil on the first screening disc reciprocate. At the same time, the centrifugal friction between the soil and the first screening disc during the rotation process causes the soil to flip. The soil moves left and right in the first screening disc while flipping itself, which greatly improves the screening effect of the soil. The swinging arc-shaped breaking plate is used to break up the soil during the twisting, which stably and effectively improves the screening efficiency. The first screening disc and the breaking rod form a cross-cross motion in the same plane, which cleverly integrates the breaking up of the soil and the screening of the soil into one, improves the fineness of the screening of the soil, and makes the screening of the soil more stable and sufficient.

[0015] 2. The disc-shaped structure of the first screening plate reduces the space for soil filtering and screening, effectively improving the efficiency of the first-level screening. The basin-shaped structure of the second screening plate increases the space for soil storage in the second-level screening, allowing fine soil to stay in the second screening plate for a long time, making the filtering and screening more thorough. The screening effects of different levels can be achieved by using screening equipment with different structures, which is an ingenious design.

[0016] 3. The soil in the first screening disc is broken up by a breaking rod that swings left and right with a fixed rotating shaft as the center point, which effectively improves the screening effect of the first screening disc on the soil. The breaking up can not only break up the clumped soil, but also collide with the moving soil, so that the impurities will not adhere to the soil, thereby improving the filtering and screening effect of the soil.

[0017] 4. The arc-shaped vibration block connected to the movable rod under the U-shaped motion plate performs interval tapping motion on the second screening plate, so that the second filter holes in the second screening plate will not be blocked, thereby improving the screening efficiency of the second screening plate for fine soil materials. By connecting with the active rotating shaft, the second screening plate can be twisted and rotated while tapping and vibrating, so that the second screening plate can screen soil materials more stably and smoothly, thereby improving the screening efficiency of soil materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the screening cylinder of the present invention; Figure 3 It is a schematic diagram of the structure inside the screening box of the present invention; Figure 4 It is a structural schematic diagram of the fixing tube of the present invention; Figure 5 It is a structural schematic diagram of the discharge hopper of the present invention; Figure 6 It is a schematic structural diagram of the first screening disc of the present invention; Figure 7 It is a schematic structural diagram of the second screening disc of the present invention; Figure 8 It is a structural schematic diagram of the active rotating shaft of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the fixing cylinder of the present invention; Fig.10 It is a structural schematic diagram of the torsion frame of the present invention; Fig.11 It is a structural schematic diagram of the arc-shaped breaking plate of the present invention; Fig.12 It is a structural schematic diagram of the U-shaped fixing plate of the present invention; Fig.13 It is a schematic structural diagram of the connection between the first screening disc and the second screening disc of the present invention; Fig.14 It is a structural schematic diagram of the U-shaped sports board of the present invention; Fig.15 For the present invention Fig.10 A schematic enlarged diagram of the structure in the middle.

[0019] Among them: 10, screening box; 11, screening cylinder; 12, motor box; 13, driving motor; 14, support frame; 15, discharge hopper; 16, T-type slide; 17, T-type slip ring; 18, scattering groove; 19, active shaft; 20, first screening plate; 21, connecting column; 22, first filter hole; 30, second screening plate; 31, second filter hole; 32, slag outlet; 40, fixed cylinder; 41, annular base ring; 42, fixed slide; 43, fixed slider; 44, rotating plate; 45, support plate; 50, twisting frame; 51, connecting plate; 52, connecting block; 53, twisting rotating rod; 54, rotating swing arm; 55, arc rod; 56, rotating column; 5 7. Fixed hole; 58. Driven shaft; 60. Breaking rod; 61. U-shaped fixed plate; 62. Reciprocating swing arm; 63. Fixed shaft; 64. T-shaped connecting rod; 65. Breaking plate; 66. Support shaft; 67. Third bevel gear; 68. Breaking support rod; 69. Arc-shaped breaking 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 vibrating block; 87. Movable rod; 88. Movable hole. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0021] Embodiment: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, it includes a screening box 10, a screening cylinder 11 for filtering and screening soil materials is arranged inside the screening box 10, a first screening disc 20 for primary screening of soil materials is movably arranged at the top of the screening cylinder 11, a second screening disc 30 for multi-stage screening of soil materials is movably arranged at the bottom of the screening cylinder 11, and the second screening disc 30 is a basin-shaped structure, and a fixed cylinder 40 for driving the first screening disc 20 and the second screening disc 30 to perform twisting and rotating motion is connected at the center of the screening cylinder 11 through a support plate 45, and a twisting assembly is arranged inside the fixed cylinder 40; The twisting assembly includes a twisting frame 50 movable inside the fixed cylinder 40, a connecting block 52 is movably connected to the inside of the twisting frame 50 through a connecting plate 51, a twisting rotating rod 53 is movably connected to the connecting block 52, and both ends of the twisting rotating rod 53 are movably connected to rotating swing arms 54. The bottom of the twisting frame 50 is connected to a rotating column 56 driving the second screening disk 30 to move through a rotating disk 44, the fixed cylinder 40 is movably connected to an active rotating shaft 19 driving the rotating swing arm 54 to move, and the top of the twisting frame 50 drives the first screening disk 20 to move through a connecting column 21; A breaking rod 60 for breaking up the soil is movably provided at the inner top of the first screening disc 20, and a breaking assembly for driving the breaking rod 60 to move is provided inside the screening box 10, and the breaking assembly includes a U-shaped fixing plate 61 fixedly installed inside the screening box 10, and the U-shaped fixing plate 61 is movably connected to a circular swing arm 62 through a fixed rotating shaft 63, and the circular swing arm 62 is movably connected to a T-shaped connecting rod 64, and the breaking rod 60 is fixedly installed on the circular swing arm 62; A vibration box 80 is fixedly installed at the bottom of the screening box 10 , and a vibration component for performing intermittent vibration motion on the second screening disc 30 is arranged inside the vibration box 80 .

[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 , Fig.10 and Fig.13 A motor box 12 is fixedly installed on the outside of the screening box 10 on one side of the top of the vibration box 80 by bolts, and a driving motor 13 is fixedly installed inside the motor box 12 by bolts. An active rotating shaft 19 passes through the screening drum 11 and the screening box 10 and is connected to the output end of the driving motor 13. The driving rotating shaft 19 is driven by the driving motor 13 in the motor box 12 to rotate, and the active rotating shaft 19 drives the rotating swing arm 54 to rotate synchronously. The rotating swing arm 54 on the side away from the motor box 12 is movably installed on the inner wall of the screening drum 11 through the driven rotating shaft 58, so that the rotating swing arms 54 at both ends of the torsion rod 53 can obtain a stable rotational movement, and the torsion rod 53 cooperates with the connecting plate 51 and the connecting block 52 to complete the reciprocating torsion effect of the torsion frame 50.

[0023] The inner wall of the screening drum 11 is provided with a T-shaped slide groove 16 at both ends, and the outer peripheries of the first screening disc 20 and the second screening disc 30 are fixedly installed with a T-shaped slide ring 17 that matches the T-shaped slide groove 16, and the T-shaped slide ring 17 moves in the T-shaped slide groove 16. The first screening disc 20 and the second screening disc 30 are supported for rotation in the screening drum 11, and the rotation movement is driven by the internal torsion frame 50. The first screening disc 20 is provided with a first filtering hole 22 at the bottom, and the second screening disc 30 is provided with a first filtering hole 22 at the bottom. A second filter hole 31 is provided at the bottom, and the diameter of the second filter hole 31 is smaller than the diameter of the first filter hole 22, so as to realize multi-stage effective filtering and screening of soil. A support frame 14 with a discharge hopper 15 is fixedly installed on the top of the screening cylinder 11 by bolts, and the discharge hopper 15 is located at the bottom center of the screening cylinder 11. A slag outlet 32 ​​with a sealing plug is provided at the bottom of the second screening disc 30. The soil that has not been filtered out of the second screening disc 30 can be taken out by opening the slag outlet 32.

[0024] See also Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.11 and Fig.12The driving shaft 19 is fixedly mounted with a first bevel gear 70 in the screening box 10, and a first rotating rod 72 is connected to the top side of the driving shaft 19 in the screening box 10 through a first support plate 71, and a second rotating rod 74 is connected to the bottom side of the driving shaft 19 in the screening box 10 through a second support plate 73. The first rotating rod 72 and the second rotating rod 74 are both mounted with a second bevel gear 75 movably engaged with the first bevel gear 70, and the first bevel gear 70 on the driving shaft 19 is engaged with the second bevel gear 75, so that 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.

[0025] The scattering assembly also includes a scattering disk 65 that moves in the U-shaped fixed plate 61, and the T-shaped connecting rod 64 moves on the scattering disk 65. The scattering disk 65 is fixedly installed with a supporting shaft 66 at the center of one side away from the fixed rotating shaft 63. The supporting shaft 66 moves through the U-shaped fixed plate 61 and is connected to a third bevel gear 67. A fourth bevel gear 76 that is movably meshed with the third bevel gear 67 is installed on the top of the first rotating rod 72. The active rotating rod cooperates with multiple sets of bevel gears to drive the supporting shaft 66 to rotate. The supporting shaft 66 carries The movable scattering disc 65 moves, and the scattering disc 65 moves up and down in the circular swing arm 62 through the T-shaped connecting rod 64 during the rotation process. When the T-shaped connecting rod 64 moves to the middle of the circular swing arm 62, the T-shaped connecting rod 64 will drive the circular swing arm 62 on the fixed rotating shaft 63 to form an angle state with the U-shaped fixed plate 61, thereby driving the circular swing arm 62 to produce a reciprocating swing effect on the U-shaped fixed plate 61, and driving the arc-shaped scattering plate 69 under the scattering rod 60 to swing and scatter the soil on the first screening disc 20.

[0026] See also Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.14 and Fig.15 The breaking rod 60 is installed on the side of the circular swing arm 62 away from the supporting shaft 66. The screening box 10 and the screening cylinder 11 are provided with a breaking groove 18 which matches the size of the breaking rod 60, and the breaking rod 60 moves in the breaking groove 18. The breaking rod 60 is evenly installed with a plurality of breaking support rods 68 at the top of the first screening disk 20. The bottom of the breaking support rod 68 is fixed with an arc-shaped breaking plate 69 for mixing and breaking the soil material by bolts, and the arc-shaped breaking plate 69 has different lengths. The arc-shaped breaking plate 69 is used to improve the breaking efficiency of the soil material on the first screening disk 20 and expand the breaking contact area of ​​the soil material.

[0027] An annular base ring 41 is fixedly installed on the inner bottom of the fixed cylinder 40 by bolts, and a fixed slide groove 42 is provided on the top of the annular base ring 41. The annular base ring 41 is slidably connected with a fixed slider 43 in the fixed slide groove 42. The torsion frame 50 on the rotating disk 44 can move back and forth stably and smoothly through the annular base ring 41, the fixed slide groove 42 and the fixed slide groove 42. The top of the fixed slider 43 is connected to the bottom of the rotating disk 44. A rotating column 56 is fixedly installed at the bottom center of the rotating disk 44, and the rotating column 56 moves in a fixed hole 57 provided at the bottom of the fixed cylinder 40. The bottom of the rotating column 56 is connected to the inner wall of the second screening disk 30 by arc rods 55. The movement of the torsion frame 50 drives the second screening disk 30 to move synchronously, and the multi-stage filtering and screening of the soil material is completed by the first screening disk 20 and the second screening disk 30.

[0028] See also Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig.14 A rotating cam 81 movable inside the vibration box 80 is fixedly installed at the bottom of the second rotating rod 74 by bolts. The vibration assembly also includes a U-shaped moving plate 82 movable inside the vibration box 80. A triangular support block 83 is fixedly installed on the outside of the screening drum 11 on the side close to the screening box 10 by bolts. A telescopic spring 84 is fixedly installed on the triangular support block 83. A U-shaped moving plate 82 is fixedly installed on the top of the telescopic spring 84 by bolts. The rotating cam 81 and the U-shaped moving plate 82 are movable against each other. When the rotating cam 81 and the U-shaped moving plate 82 are against each other, the telescopic spring 84 will enter a state of stretching and storing force.

[0029] A movable plate 85 is fixedly installed at the bottom center of the U-shaped moving plate 82 by bolts, and a movable rod 87 with an arc-shaped vibrating block 86 is fixedly installed at the center of one side of the movable plate 85 close to the screening cylinder 11 by bolts, and the screening cylinder 11 is provided with a movable hole 88 that matches the size of the movable rod 87. The movable rod 87 movably penetrates the movable hole 88, and the arc-shaped vibrating block 86 is movably opposed to the side of the second screening disk 30. The telescopic spring 84 is used to store force and reset to drive the arc-shaped vibrating block 86 on the movable rod 87 to perform intermittent vibration and knock on the side of the second screening disk 30, so as to prevent the second filtering holes 31 on the second screening disk 30 from being blocked, thereby greatly improving the filtering and screening efficiency of the soil material.

[0030] Working principle: soil material is injected onto the first screening plate 20, and the driving motor 13 in the motor box 12 drives the active shaft 19 to rotate, and the active shaft 19 drives the rotating swing arm 54 to rotate. During the swinging process, the rotating swing arm 54 reciprocates the torsion frame 50 on the annular base ring 41 through the connecting plate 51, the connecting block 52 and the torsion rotating rod 53. When the rotating swing arms 54 at both ends of the fixed cylinder 40 are kept horizontal with the connecting plate 51, the active shaft 19 connected to the rotating frame 50 is connected to the rotating frame 50. The rotating swing arm 54 is at the highest point, at which time the torsion rod 53 and the connecting block 52 are in a cross state with the torsion frame 50. When the rotating swing arm 54 moves to a horizontal state, the connecting block 52 and the torsion rod 53 will be used 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 bottom, the torsion frame 50 is reset again. This reciprocating movement enables the torsion frame to achieve reciprocating torsion, and the rotating swing arm 54 at the other end of the torsion rod 53 cooperates with the driven shaft 58 to complete the rotation support. When the twisting frame 50 twists back and forth, the first screening disc 20 is driven by the connecting column 21 on the top of the twisting frame 50 to realize synchronous rotation and twisting under the action of the T-shaped slide groove 16 and the T-shaped slip ring 17. The twisting frame 50 drives the second screening disc 30 under the arc rod 55 through the rotating column 56 of the rotating disc 44 to realize synchronous reciprocating twisting under the action of the T-shaped slide groove 16 and the T-shaped slip ring 17, and the soil material is primarily screened through the first filtering holes 22 of the first screening disc 20, and then the soil material is multi-stage filtered and screened through the second filtering holes 31 of the second screening disc 30. When twisting and screening, the first bevel gear 70 on the active shaft 19 meshes with the second bevel gear 75 at the bottom of the first rotating rod 72 to move, and the second bevel gear 75 synchronously drives the first rotating rod 72 on the first support plate 71 to rotate. The first rotating rod 72 meshes with the fourth bevel gear 76 to drive the third bevel gear 67 and the supporting shaft 66 to rotate synchronously. During the rotation process, the supporting shaft 66 drives the scattering disk 65 inside the U-shaped fixed plate 61 to rotate, and the scattering disk 65 rotates. During the rotation process, the T-shaped connecting rod 64 moves on the circular swing arm 62, so that the circular swing arm 62 moves back and forth on the fixed rotating shaft 63, and the circular swing arm 62 drives the scattering rod 60 to reciprocate in the scattering groove 18. The scattering rod 60 drives the arc scattering plate 69 to reciprocate inside the first screening disc 20 through the scattering support rod 68, and the soil materials in the first screening disc 20 are scattered and mixed by the arc scattering plate 69, thereby improving the screening efficiency of the first screening disc 20 for the soil materials; At the same time, in the process of reciprocating torsion frame 50, the first bevel gear 70 on the active rotating shaft 19 meshes with the second bevel gear 75 on the top of the second rotating rod 74 to move, and the second bevel gear 75 synchronously drives the second rotating rod 74 on the second support plate 73 to rotate. The second rotating rod 74 drives the rotating cam 81 in the vibration box 80 to rotate during the synchronous rotation movement. 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 force is stored. When the rotating cam 81 is disengaged from the U-shaped moving plate 82, the resetting of the telescopic spring 84 drives the movable plate 85 under the U-shaped moving plate 82 to move, and the movable rod 87 on one side of the movable plate 85 moves synchronously. The arc-shaped vibration block 86 connected to the movable rod 87 will perform interval knocking and vibration on the second screening disk 30, effectively preventing the second filtering holes 31 in the second screening disk 30 from being blocked; After the soil material is screened at multiple stages, the operator opens the slag outlet 32 ​​at the bottom of the second screening plate 30 through the discharge hopper 15 to discharge the unfiltered soil particles in a centralized manner, while the unfiltered soil slag on the first screening plate 20 is directly cleaned by external dust collection equipment.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A screening device for multi-stage filtration of soil materials, comprising a screening box (10), characterized in that: The screening box (10) is provided with a screening cylinder (11) for filtering and screening soil materials, a first screening disc (20) for primary screening of soil materials is movably provided at the top of the screening cylinder (11), a second screening disc (30) for multi-stage screening of soil materials is movably provided at the bottom of the screening cylinder (11), a fixed cylinder (40) for driving the first screening disc (20) and the second screening disc (30) to perform twisting and rotating motion is connected at the center of the screening cylinder (11) via a support plate (45), and a twisting assembly is provided inside the fixed cylinder (40); The twisting assembly comprises a twisting frame (50) movable inside the fixed cylinder (40), a connecting block (52) movably connected to the inside of the twisting frame (50) via a connecting plate (51), a twisting rotating rod (53) movably connected to the connecting block (52), a rotating swing arm (54) movably connected to both ends of the twisting rotating rod (53), a rotating column (56) for driving the second screening disc (30) to move connected to the bottom of the twisting frame (50) via a rotating disc (44), an active rotating shaft (19) for driving the rotating swing arm (54) to move connected to the fixed cylinder (40), and a top of the twisting frame (50) drives the first screening disc (20) to move via a connecting column (21); A breaking rod (60) for breaking up soil is movably provided on the inner top of the first screening disc (20); a breaking assembly for driving the breaking rod (60) to move is provided inside the screening box (10); the breaking assembly comprises a U-shaped fixing plate (61) fixedly mounted inside the screening box (10); the U-shaped fixing plate (61) is movably connected to a circular swing arm (62) via a fixed rotating shaft (63); the circular swing arm (62) is movably connected to a T-shaped connecting rod (64); the breaking rod (60) is fixedly mounted on the circular swing arm (62); A vibration box (80) is fixedly mounted on the bottom of the screening box (10), and a vibration component for performing intermittent vibration motion on the second screening disc (30) is arranged inside the vibration box (80).

2. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: A motor box (12) is fixedly mounted on the top side of the vibration box (80) on the outside of the screening box (10) by means of bolts, a drive motor (13) is fixedly mounted on the inside of the motor box (12) by means of 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 drive motor (13), and the rotating swing arm (54) on the side away from the motor box (12) is movably mounted on the inner wall of the screening cylinder (11) via a driven shaft (58).

3. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: The inner wall of the screening cylinder (11) is provided with T-shaped grooves (16) at both upper and lower ends; the outer peripheries of the first screening disc (20) and the second screening disc (30) are both fixedly mounted with T-shaped sliding rings (17) matching the T-shaped sliding grooves (16); the T-shaped sliding rings (17) are movable in the T-shaped sliding grooves (16); the bottom of the first screening disc (20) is provided with first filtering holes (22); the bottom of the second screening disc (30) is provided with second filtering holes (31); a support frame (14) with a discharge hopper (15) is fixedly mounted on the top of the screening cylinder (11) by bolts; the discharge hopper (15) is located at the bottom center of the screening cylinder (11); the bottom of the second screening disc (30) is provided with a slag discharge port (32) with a sealing plug.

4. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: The active rotating shaft (19) is fixedly mounted with a first bevel gear (70) in the screening box (10); a first rotating rod (72) is connected to the top side of the active rotating shaft (19) in the screening box (10) via a first support plate (71); a second rotating rod (74) is connected to the bottom side of the active rotating shaft (19) in the screening box (10) via a second support plate (73); and both the first rotating rod (72) and the second rotating rod (74) are mounted with a second bevel gear (75) movably meshing with the first bevel gear (70).

5. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: The scattering assembly also includes a scattering disc (65) movable in the U-shaped fixed plate (61), and the T-shaped connecting rod (64) is movable on the scattering disc (65), and the scattering disc (65) is fixedly installed with a supporting shaft (66) at the center of a side away from the fixed rotating shaft (63), and the supporting shaft (66) movably passes through the U-shaped fixed plate (61) and is connected to a third bevel gear (67), and a fourth bevel gear (76) movably meshing with the third bevel gear (67) is installed on the top of the first rotating rod (72).

6. The screening device for multi-stage filtration of soil materials according to claim 5, characterized in that: The breaking rod (60) is installed on a side of the circular swing arm (62) away from the supporting shaft (66); the screening box (10) and the screening cylinder (11) are provided with a breaking groove (18) that matches the size of the breaking rod (60), and the breaking rod (60) moves in the breaking groove (18); the breaking rod (60) is evenly installed with a plurality of breaking support rods (68) at the top of the first screening plate (20); the bottom of the breaking support rod (68) is fixed with an arc-shaped breaking plate (69) for mixing and breaking the soil material by bolts, and the arc-shaped breaking plate (69) has different lengths.

7. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: An annular base ring (41) is fixedly mounted on the inner bottom of the fixed cylinder (40) by means of bolts, a fixed slide groove (42) is provided on the top of the annular base ring (41), a fixed slider (43) is slidably connected to the annular base ring (41) in the fixed slide groove (42), the top end of the fixed slider (43) is connected to the bottom of the rotating disk (44), a rotating column (56) is fixedly mounted at the bottom center of the rotating disk (44), and the rotating column (56) moves in a fixed hole (57) provided on the bottom of the fixed cylinder (40), and the bottom of the rotating column (56) is connected to the inner wall of the second screening disk (30) via arc rods (55) on all sides.

8. The screening device for multi-stage filtration of soil materials according to claim 1, characterized in that: A rotating cam (81) movable inside the vibration box (80) is fixedly mounted on the bottom of the second rotating rod (74) by means of bolts. The vibration assembly further comprises a U-shaped moving plate (82) movable inside the vibration box (80). A triangular support block (83) is fixedly mounted on the outside of the screening cylinder (11) on a side close to the screening box (10) by means of bolts. A telescopic spring (84) is fixedly mounted on the triangular support block (83). The U-shaped moving plate (82) is fixedly mounted on the top of the telescopic spring (84) by means of bolts. The rotating cam (81) and the U-shaped moving plate (82) are movable against each other.

9. The screening device for multi-stage filtration of soil materials according to claim 8, characterized in that: A movable plate (85) is fixedly mounted at the bottom center of the U-shaped moving plate (82) by means of bolts, and a movable rod (87) with an arc-shaped vibration block (86) is fixedly mounted at the center of one side of the movable plate (85) by means of bolts, and the screening cylinder (11) is provided with a movable hole (88) having a size matching that of the movable rod (87), and the movable rod (87) is movably inserted into the movable hole (88), and the arc-shaped vibration block (86) movably contacts the side of the second screening disc (30).

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