Building solid waste material screening device

Abstract

The invention discloses a building solid waste material screening device, and particularly relates to the technical field of solid screening, the building solid waste material screening device comprises a screening machine, a feeding hopper and a screening cylinder, the top of the screening machine is provided with a first discharging port for discharging materials in the screening cylinder, and the bottom of the screening machine is provided with a second discharging port for discharging screened materials; a light and heavy screening assembly for screening materials screened by the screening cylinder again is installed in the screening machine. Through the arrangement of the light and heavy screening plate, the screening barrel and the first discharging opening, the height difference exists between the screening barrel and the light and heavy screening plate, the path of solid waste falling on the surface of the light and heavy screening plate is prolonged, and the distance between the light and heavy screening plate and the screening barrel forms a buffer space; when air flow blown out of the air outlet nozzle enters the space, the air flow can be buffered and diffused to a certain extent in the space, the light waste is pushed by consistent wind power, the light waste is prevented from remaining in screened materials, and the screening efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid screening, and in particular to a device for screening construction solid waste materials. Background Art

[0002] With the rapid development of urban construction, the amount of construction solid waste is increasing. These solid wastes are complex in composition, including concrete blocks, bricks, metals, wood and plastics. Since construction solid waste is a complex mixture that contains a variety of valuable materials, screening equipment is needed to screen the waste concrete blocks and screen out the concrete fragments for road base filling or production of recycled aggregates to reduce the exploitation of natural resources. At present, when screening complex solid waste mixtures, multi-stage screening machines are mostly used to screen the solid waste into primary, secondary and tertiary levels. , thereby achieving the classification of coarse particles (such as large pieces of concrete, bricks), medium particles (such as crushed stone, sand) and fine particles according to the sorting process; since light solid waste is likely to exist inside the solid waste during the sorting process, these external forces will cause the solid waste to continuously roll and move on the screening plate during the vibration screening process. In this process, the relative position between light waste and heavier waste will change, causing them to intertwine with each other, causing light waste to be screened together with heavier waste, resulting in light waste remaining in the screened material, affecting the incomplete classification of solid waste at the front end and reducing screening efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for screening construction solid waste materials to solve the above-mentioned shortcomings in the technology.

[0004] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for screening construction solid waste materials, comprising a screening machine, a feed hopper and a screening drum, a first discharge port for discharging the material inside the screening drum being opened on the top of the screening machine, and a second discharge port for discharging the screened material being opened on the bottom of the screening machine, a light and heavy screening assembly for re-screening the material screened by the screening drum being installed inside the screening machine, the light and heavy screening assembly comprising a light and heavy screening plate installed inside the screening machine for vibrating and screening the material, a wind collecting shell which is in communication with the interior of the screening machine being fixedly connected to one side of the screening machine, the wind collecting shell generating wind force between the light and heavy screening plate and the screening drum for blowing out the light material inside the fallen material, a pre-screening assembly for dispersing the material inside the feed hopper and the screening drum being provided on the top of the screening machine, two symmetrical throttling assemblies being provided inside the screening machine, and the throttling assembly being used to disturb the waste material between the light and heavy screening plate and the screening drum.

[0005] Preferably, the screening machine is fixedly connected to a distribution box on the side away from the air collecting shell, and the distribution box is arranged as a volute structure, a material inlet cavity is commonly connected between the distribution box and the screening machine, and the material inlet cavity remains corresponding to the air collecting shell, a blower is fixedly connected to the outside of the air collecting shell, and the blower is used to generate wind force inside the air collecting shell, a plurality of air outlet nozzles communicated with the interior of the air collecting shell are fixedly connected to one side of the air collecting shell, a third discharge port is provided on the side of the screening machine close to the light and heavy screening plate, and a subdivision component is provided on one side of the distribution box for re-discharging the residual material in the material inlet cavity into the surface of the light and heavy screening plate.

[0006] Preferably, the subdivision component includes a subdivision rack fixedly connected to the inside of the feed chamber, and the subdivision rack is arranged as a trapezoidal structure, the distribution box and the screening machine are commonly connected with two throwing pipes which are communicated with the inside thereof, and a number of fine material openings are commonly opened between the subdivision rack and the distribution box, and the fine material openings are used to discharge the waste material inside the feed chamber into the inside of the throwing pipe, and the top of the distribution box is hinged with a closing plate which opens and closes with the inside thereof.

[0007] Preferably, the pre-screening assembly includes a feed pipe fixedly connected between the feed hopper and the screening machine, a support frame is commonly connected between the feed pipe and the screening machine, a rotating rod is commonly connected between the support frame, the feed pipe and the screening machine, the outside of the rotating rod is fixedly sleeved with a sleeve, the outside of the rotating rod is fixedly sleeved with a spiral push rack, and the spiral push rack is located inside the feed pipe, a first servo motor is fixedly connected to one side of the support frame, and the first servo motor is used to drive the rotating rod to rotate.

[0008] Preferably, the outside of the rotating rod is fixedly sleeved with a casing, and the casing is located inside the screening cylinder. The outside of the casing is fixedly connected with a plurality of throwing rod racks, and the throwing rod racks are arranged as an I-shaped structure.

[0009] Preferably, the throttling assembly includes a positioning plate fixedly connected to the inside of the screening machine, two guide sliders are symmetrically connected to the outside of the positioning plate, two fixed columns are commonly connected between the two guide sliders, a disturbance rod is provided on one side of the two fixed columns, and the disturbance rod is used to contact the fallen waste, and a multi-directional assembly is provided between the fixed column and the positioning plate to drive the disturbance rod to move back and forth horizontally and up and down.

[0010] Preferably, the multi-directional component includes a plurality of tooth-groove meshing columns fixedly connected to one side of the positioning plate, two fixed columns are rotatably connected to a ring gear frame meshed with the tooth-groove meshing columns on the side close to the positioning plate, a limiting plate is slidably connected between the two fixed columns, a second servo motor is fixedly connected to the side of the limiting plate away from the ring gear frame, and the second servo motor is used to drive the ring gear frame to rotate, and a quick-displacement component is provided between the limiting plate and the disturbance rod to drive the disturbance rod to rotate.

[0011] Preferably, the quick-displacement assembly includes a centering slider slidably connected to one side of the fixed column, and the centering slider is sleeved on the outside of the second servo motor, the disturbance rod is fixedly connected to an ear column at one end close to the centering slider, and one side of the centering slider is fixedly connected to a centering frame, and the centering frame and the ear column are connected, and the outside of the disturbance rod is fixedly connected to a plurality of ear plates.

[0012] In the above technical solution, the technical effects and advantages provided by the present invention are: 1. The present invention arranges the air outlet nozzle, the light and heavy screening plates, the screening machine, the screening drum and the first discharge port so that there is a height difference between the screening drum and the light and heavy screening plates, which is used to extend the path of solid waste falling on the surface of the light and heavy screening plates. The distance between the light and heavy screening plates and the screening drum forms a buffer space. When the airflow blown out by the air outlet nozzle enters this space, the airflow will be buffered and diffused to a certain extent, which helps to avoid excessive concentration of the airflow and enables the airflow to be more evenly distributed in the entire screening area. The uniform airflow can better act on each waste particle, allowing the light waste to be pushed by a more consistent wind force, thereby being separated more smoothly, preventing the light waste from remaining in the screened material, which is beneficial to the front-end solid waste classification and improves the screening efficiency. 2. The present invention is provided with a feed chamber, a subdivision rack, a throwing pipe and a light and heavy screening plate. The light waste moves along the inner wall of the feed chamber to the top of the subdivision rack. Then the light waste is in a dispersed state during the movement. At this time, the light waste is separated from the small particle waste carried inside it, and the throwing pipe re-discharges the small particle waste inside it to the surface of the light and heavy screening plate. Then the light and heavy screening plate re-screens the small particle waste, thereby improving the solid waste screening accuracy and effectively separating non-target waste. 3. The present invention, through the arrangement of the pre-screening assembly, screening drum, air outlet nozzle and light and heavy screening plate, can fully lift or flip the solid waste inside the screening drum. In addition, during the stirring process of the rotating rod, the light waste will be thrown into the inside of the screening drum, while the heavier waste will fall faster due to its greater inertia, forming a significant density difference. As a result, the light waste and the heavier waste will pass through the screening opening of the screening drum in a more dispersed manner, optimizing the separation trajectory of the light and heavy waste and further improving the light and heavy waste separation effect. 4. The present invention arranges a disturbance rod, an air outlet nozzle, a screening drum and a light and heavy screening plate. The disturbance rod moves to different positions of the falling waste to interfere with it, so that the waste forms a turbulent state after contacting the disturbance rod, which is beneficial for the airflow to have more opportunities to blow it away from the heavier waste, so that the waste will have a longer residence time when passing through the wind area, and the light waste can be more effectively separated from the heavier waste, thereby improving the waste screening effect; 5. The present invention, through the arrangement of multi-directional components, disturbance rods and light and heavy screening plates, can realize that the disturbance rod forms a circular motion state inside the screening machine, which can evenly distribute the waste in the airflow action area, ensuring that after the disturbance rod disperses the waste, the airflow can accurately act on the target waste, avoiding the increase of airflow resistance due to the dense waste, and reducing energy consumption; 6. The present invention, through the arrangement of the disturbance rod, the quick discharge component, the third discharge port and the light and heavy screening plates, can form resistance after contact with the waste on the surface of the light and heavy screening plates and push the waste along the surface of the light and heavy screening plates to the vicinity of the third discharge port, thereby accelerating the discharge of target waste. At the same time, the ear plates are used to flatten the waste that is more concentrated on the surface of the light and heavy screening plates when pushing the waste, so that the waste can quickly pass through the light and heavy screening plates and fall to the inside of the first discharge port, thereby improving the flexibility of solid waste screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 This is a schematic structural diagram of the first discharge port of the present invention; Figure 2 It is a structural schematic diagram of the material distribution box of the present invention; Figure 3 This is a schematic structural diagram of the light and heavy screening plate of the present invention; Figure 4 For the present invention Figure 3 A local enlarged view of point A in FIG; Figure 5 It is a structural schematic diagram of the rod throwing frame of the present invention; Figure 6 It is a structural schematic diagram of the spiral push frame of the present invention; Figure 7 This is a schematic structural diagram of the positioning plate of the present invention; Figure 8 For the present invention Figure 7 A local enlarged view of point B in FIG; Figure 9 It is a structural schematic diagram of the feed chamber of the present invention; Figure 10 It is a structural schematic diagram of the subdivision frame of the present invention; Figure 11 A schematic diagram of the structure of the ring gear carrier of the present invention meshing with the rightmost tooth groove meshing column; Figure 12 It is a schematic structural diagram of the engagement between the ring gear carrier and the leftmost tooth groove engagement column of the present invention.

[0015] Description of reference numerals: 1. Screening machine; 11. Feed hopper; 12. Screening drum; 13. First discharge port; 14. Second discharge port; 2. Light and heavy screening assembly; 21. Light and heavy screening plate; 22. Air collecting shell; 23. Air outlet nozzle; 24. Blower; 25. Material distribution box; 26. Material introduction chamber; 27. Third material outlet; 3. Pre-screen assembly; 31. Feed pipe; 32. Rotating rod; 33. Housing; 34. Screw pusher; 35. First servo motor; 36. Support frame; 37. Rod thrower frame; 4. Throttle assembly; 41. Positioning plate; 42. Guide slide; 43. Fixing column; 44. Ring gear rack; 45. Tooth-slot engagement column; 46. Disturbance rod; 47. Limiting plate; 48. Second servo motor; 5. Quick-displacement assembly; 51. Ear plate; 52. Centering slider; 53. Centering frame; 54. Ear post; 6. Subdivision assembly; 61. Subdivision rack; 62. Closing plate; 63. Fine material port; 64. Material throwing tube. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] The present invention provides Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The device for screening construction solid waste materials shown in the figure comprises a screening machine 1, a feed hopper 11 and a screening drum 12. A first discharge port 13 is provided on the top of the screening machine 1 for discharging the material inside the screening drum 12, and a second discharge port 14 is provided on the bottom of the screening machine 1 for discharging the screened material. A light and heavy screening assembly 2 is installed inside the screening machine 1 for re-screening the material screened by the screening drum 12. The light and heavy screening assembly 2 includes a light and heavy screening plate 21 installed inside the screening machine 1 for vibrating and screening the material. An air collecting shell 22 is fixedly connected to one side of the screening machine 1 and is communicated with the interior thereof. The air collecting shell 22 is connected between the light and heavy screening plate 21 and the screening drum 12. Wind is generated between the dividing cylinders 12 to blow out the light material inside the fallen material: a distribution box 25 is fixedly connected to the side of the screening machine 1 away from the air collecting shell 22, and the distribution box 25 is configured as a volute structure, a material introduction cavity 26 is commonly connected between the distribution box 25 and the screening machine 1, and the material introduction cavity 26 corresponds to the air collecting shell 22, a blower 24 is fixedly connected to the outside of the air collecting shell 22, and the blower 24 is used to generate wind force inside the air collecting shell 22, and a plurality of air outlet nozzles 23 communicating with the interior of the air collecting shell 22 are fixedly connected to one side of the air collecting shell 22, and a third discharge port 27 is provided on the side of the screening machine 1 close to the light and heavy screening plate 21; Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the first discharge port 13 and the second discharge port 14 are distributed at different positions outside the screening machine 1, and are used to classify and screen solid waste of different particle sizes. The first discharge port 13 and the second discharge port 14 can be connected to different external conveying equipment to transport the screened solid waste to a designated location. The number of the plurality of air outlet nozzles 23 is seven, and the seven air outlet nozzles 23 are arranged in a linear array on one side of the air collecting shell 22. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 9 As shown, when it is necessary to screen the light solid waste (wood blocks or plastics) and heavy solid waste (concrete blocks or bricks) inside the screening machine 1, the solid waste to be sorted is first put into the inside of the feed hopper 11, and then the feed hopper 11 transports the solid waste inside it to the inside of the screening drum 12. At this time, the solid waste falls through the screening port of the screening drum 12 to the surface of the light and heavy screening plate 21, and there is a height difference between the screening drum 12 and the light and heavy screening plate 21, which is used to prolong the time for the solid waste to fall on the light and heavy screening plate 21. 1 surface path, and the blower 24 rotates the gas from the air inlet into its volute-shaped cavity and flows to the vicinity of the rotating impeller. Then the gas is guided to the outlet inside the blower 24 and forms high-pressure gas, so that the high-pressure airflow is discharged from the outlet into the interior of the wind collecting shell 22. At this time, a directional wind force is formed inside the wind collecting shell 22 and transported to the interior of the seven air outlet nozzles 23. Then the seven air outlet nozzles 23 generate wind force inside the screening machine 1. As the wind force is used to blow the falling solid waste, the solid waste is then The waste is affected by the wind, so that the solid waste is separated into light and heavy during the falling process, and the heavier waste keeps the original trajectory while being discharged, while the light waste is blown to the inside of the feed chamber 26 under the action of the wind. At this time, the light waste slides along the inner wall of the feed chamber 26 to the deep inside, and then the heavier waste falls on the surface of the light and heavy screening plate 21, and the light and heavy screening plate 21 is used to sort the heavier waste again; since there is a certain distance between the light and heavy screening plate 21 and the screening cylinder 12, the distance between the light and heavy screening plate 21 and the screening cylinder 12 forms a buffer space. When the airflow blown out by the air outlet nozzle 23 enters this space, the airflow will be buffered and diffused therein, which helps to avoid excessive concentration of the airflow and make the airflow more evenly distributed in the entire screening area. The uniform airflow can better act on each waste particle, so that the light waste is pushed by a more consistent wind force, thereby being separated more smoothly, reducing the situation where some light waste cannot be effectively separated due to uneven airflow.

[0018] refer to Figure 9 and Figure 10As shown, a subdivision assembly 6 for re-discharging the residual material in the feed chamber 26 into the surface of the light and heavy screening plate 21 is provided on one side of the distribution box 25; the subdivision assembly 6 includes a subdivision rack 61 fixedly connected to the inside of the feed chamber 26, and the subdivision rack 61 is arranged in a trapezoidal structure. Two throwing pipes 64 communicating with the interior of the distribution box 25 and the screening machine 1 are commonly connected between the distribution box 25 and the screening machine 1. A plurality of fine material openings 63 are commonly opened between the subdivision rack 61 and the distribution box 25, and the fine material openings 63 are used to discharge the waste material in the feed chamber 26 into the inside of the throwing pipes 64. The top of the distribution box 25 is hinged with a closing plate 62 that opens and closes with the interior. In addition, the subdivision rack 61 is configured as a trapezoidal structure, with the middle portion of the subdivision rack 61 being convex and both ends of the subdivision rack 61 being inclined, thereby guiding the small particles of light waste in the feed chamber 26 and facilitating the discharge of the small particles into the feed opening 63. refer to Figure 9 and Figure 10 As shown, when light waste is blown into the interior of the feed inlet chamber 26 and the light waste contains small particles, the light waste moves along the inner wall of the feed inlet chamber 26 to the top of the subdivision rack 61, and then the light waste is in a dispersed state during the movement. At this time, the light waste is separated from the small particles of waste carried inside it, and the small particles of waste approach the top of the subdivision rack 61, and the subdivision rack 61 guides the small particles of waste near it to the inside of the fine material port 63, so that the small particles of waste are discharged into the interior of the throwing pipe 64 through the fine material port 63, and then the throwing pipe 64 re-discharges the small particles of waste inside it to the surface of the light and heavy screening plate 21, and then the light and heavy screening plate 21 re-screens the small particles of waste, thereby improving the solid waste screening accuracy and effectively separating From non-target waste, as the light waste is continuously collected inside the feed chamber 26, the closing plate 62 is opened to expose the internal space of the feed chamber 26 to the outside, and then the light waste inside the feed chamber 26 is collected and processed in the same way. In addition, the target waste remaining on the surface of the light and heavy screening plate 21 approaches the third discharge port 27 under the continuous vibration of the light and heavy screening plate 21, and is discharged from the interior of the screening machine 1 by the third discharge port 27; thus, the third discharge port 27, the first discharge port 13 and the second discharge port 14 cooperate with each other to realize the classification and screening of waste. Accurate screening and classification enable the recyclable resources in construction solid waste to be more effectively recycled, thereby improving resource utilization and reducing resource waste.

[0019] refer to Figure 3 、 Figure 5 and Figure 6As shown, a pre-screening assembly 3 for dispersing the materials inside the feed hopper 11 and the screening drum 12 is provided on the top of the screening machine 1; the pre-screening assembly 3 includes a feed pipe 31 fixedly connected between the feed hopper 11 and the screening machine 1, a support frame 36 is commonly connected between the feed pipe 31 and the screening machine 1, a rotating rod 32 is commonly connected between the support frame 36, the feed pipe 31 and the screening machine 1, the outer portion of the rotating rod 32 is fixedly sleeved with a casing 33, the outer portion of the rotating rod 32 is fixedly sleeved with a spiral push frame 34, and the spiral push frame 34 is located inside the feed pipe 31, one side of the support frame 36 is fixedly connected to a first servo motor 35, and the first servo motor 35 is used to drive the rotating rod 32 to rotate; the outer portion of the rotating rod 32 is fixedly sleeved with a casing 33, and the casing 33 is located inside the screening drum 12, the outer portion of the casing 33 is fixedly connected to a plurality of throwing rod frames 37, and the throwing rod frames 37 are arranged as an I-shaped structure; refer to Figure 3 、 Figure 5 and Figure 6 As shown, in addition, the spiral push rack 34 is set to a spiral structure, which can disperse the waste into the interior of the screening drum 12, and the number of the plurality of throwing rod racks 37 is three; when the waste inside the feed hopper 11 is transported to the interior of the screening drum 12, the first servo motor 35 drives the rotating rod 32 to rotate synchronously, and then the rotating rod 32 rotates to drive the spiral push rack 34 to rotate synchronously. At this time, the rotation of the spiral push rack 34 is used to push the waste inside the feed pipe 31 to move into the interior of the screening drum 12, and the solid waste inside the feed pipe 31 is pre-dispersed under the rotation of the spiral push rack 34, so that the light waste is separated from the heavier waste and dispersed and discharged into the screening drum. Inside the separation drum 12, during this process, the rotation of the rotating rod 32 drives the sleeve 33 to rotate synchronously. At this time, the rotation of the rotating rod 32 drives the three throwing rod racks 37 to rotate synchronously. At this time, the throwing rod rack 37 will fully lift or flip the solid waste, and during the stirring process of the rotating rod 32, the light waste will be thrown into the inside of the screening drum 12, while the heavier waste will fall faster due to its greater inertia, forming an obvious density difference, so that the light waste and the heavier waste will pass through the screening port of the screening drum 12 more dispersedly, optimizing the separation trajectory of light and heavy waste, and then forming a synergistic effect between the pre-screening component 3 and the air outlet nozzle 23, further improving the separation effect of light and heavy waste.

[0020] refer to Figure 7 、 Figure 8 、 Figure 11 and Figure 12As shown, the interior of the screening machine 1 is provided with two symmetrical throttling components 4, and the throttling components 4 are used to disturb the waste between the light and heavy screening plates 21 and the screening drum 12. The throttling components 4 include a positioning plate 41 fixedly connected to the interior of the screening machine 1, and two guide sliders 42 are symmetrically connected to the outside of the positioning plate 41. Two fixed columns 43 are commonly connected between the two guide sliders 42. A disturbance rod 46 is provided on one side of the two fixed columns 43, and the disturbance rod 46 is used to contact the falling waste. The fixed column 43 is connected to the positioning plate 41. 1 is provided with a multi-directional assembly that drives the disturbance rod 46 to move back and forth horizontally and up and down; the multi-directional assembly includes a plurality of tooth-slot engaging columns 45 fixedly connected to one side of the positioning plate 41, two fixed columns 43 are rotatably connected to the side of the positioning plate 41 close to the ring gear frame 44 that meshes with the tooth-slot engaging columns 45, a limiting plate 47 is slidably connected between the two fixed columns 43, and a second servo motor 48 is fixedly connected to the side of the limiting plate 47 away from the ring gear frame 44, and the second servo motor 48 is used to drive the ring gear frame 44 to rotate; refer to Figure 7 、 Figure 8 、 Figure 11 and Figure 12As shown, in addition, the two disturbance rods 46 are combined to form a whole; when the waste falls between the screening drum 12 and the light and heavy screening plate 21, and the air outlet nozzle 23 blows and separates the light and heavy waste, the second servo motor 48 drives the ring gear frame 44 to rotate synchronously, and then the ring gear frame 44 rotates and forms a meshing transmission with a plurality of tooth groove meshing columns 45. At this time, the ring gear frame 44 moves horizontally along the outside of the plurality of tooth groove meshing columns 45, and the ring gear frame 44 drives the two fixed columns 43 and the two guide sliders 42 to move horizontally along the outside of the positioning plate 41 and one end of the plurality of tooth groove meshing columns 45 during the movement, and the movement of the fixed column 43 drives the disturbance rod 46 moves synchronously along the interior of the screening machine 1, so that the disturbance rod 46 moves to different positions of the falling waste to conflict with it, so that the waste forms a turbulent state after contacting the disturbance rod 46, which is beneficial for the airflow to have more opportunities to blow it away from the heavier waste, so that the waste will have a longer residence time when passing through the wind area, and the light waste will be more effectively separated from the heavier waste, thereby improving the waste screening effect. In addition, when the ring gear frame 44 moves to the leftmost side of the positioning plate 41, the ring gear frame 44 and the leftmost tooth groove meshing column 45 are kept in meshing state, and then the rotation of the ring gear frame 44 moves along the outer circumference of the leftmost tooth groove meshing column 45, and the ring gear frame 44 moves downward along one side of the positioning plate 41, and the ring gear frame 44 moves downward, driving the limiting plate 47 to move downward between the two fixed columns 43, so that the limiting plate 47 moves downward, driving the disturbance rod 46 to move downward synchronously along one side of the fixed column 43, so that the disturbance rod 46 moves closer to the surface of the light and heavy screening plate 21, and the disturbance rod 46 is used to change the horizontal movement of the left along the side of the positioning plate 41 to move downward, and the height between the disturbance rod 46 and the positioning plate 41 is adjusted synchronously, and then the ring gear frame 44 continues to rotate and engages with a plurality of tooth groove meshing columns 45 to drive the disturbance rod 46 to move horizontally from left to right. Similarly, the ring gear frame 44 moves to the positioning plate 41, and the ring gear frame 44 moves to the positioning plate 41. When the plate 41 is on the rightmost side, the ring gear frame 44 moves along the outer circumference of the rightmost tooth groove meshing column 45, so that the disturbance rod 46 moves from bottom to top, and reciprocates in sequence, so that the disturbance rod 46 makes a circular reciprocating motion along one side of the positioning plate 41, which is conducive to the disturbance rod 46 having multiple motion states. The motion state of the disturbance rod 46 changes from horizontal movement to left to downward movement, and then from downward movement to horizontal movement to right, and from horizontal movement to upward movement. In this reciprocating manner, the waste can be evenly distributed in the airflow action area, ensuring that after the disturbance rod 46 disperses the waste, the airflow can accurately act on the target waste, avoiding the increase of airflow resistance due to dense waste, and reducing energy consumption.

[0021] refer to Figure 7 、 Figure 8 、 Figure 11 and Figure 12As shown, a quick-displacement assembly 5 for driving the disturbance rod 46 to rotate is provided between the limiting plate 47 and the disturbance rod 46. The quick-displacement assembly 5 includes a centering slider 52 slidably connected to one side of the fixed column 43, and the centering slider 52 is sleeved on the outside of the second servo motor 48. An ear column 54 is fixedly connected to one end of the disturbance rod 46 close to the centering slider 52. A centering frame 53 is fixedly connected to one side of the centering slider 52, and the centering frame 53 is connected to the ear column 54. A plurality of ear plates 51 are fixedly connected to the outside of the disturbance rod 46. refer to Figure 7 As shown, the plurality of ear plates 51 are divided into four groups, with two groups outside each fixing column 43, and the two groups of ear plates 51 outside the two fixing columns 43 are kept symmetrically staggered.

[0022] refer to Figure 7 、 Figure 8 、 Figure 11 and Figure 12 As shown, when the disturbance rod 46 moves from top to bottom along one side of the positioning plate 41 and the waste on the surface of the light and heavy screening plate 21 is unevenly distributed, the disturbance rod 46 moves from top to bottom along one side of the positioning plate 41, and then the outside of the ear plate 51 is located near the surface of the light and heavy screening plate 21, and there is a certain distance between the ear plate 51 and the light and heavy screening plate 21. At this time, the movement of the disturbance rod 46 drives the ear plate 51 to move synchronously, and the ear plate 51 forms a friction after contacting the waste on the surface of the light and heavy screening plate 21 and pushes the waste along the surface of the light and heavy screening plate 21 to the vicinity of the third discharge port 27, thereby accelerating the discharge of the target waste. At the same time, the ear plate 51 is used to flatten the waste that is more concentrated on the surface of the light and heavy screening plate 21 when pushing the waste, so that the waste can quickly pass through the light and heavy screening plate 21 and fall to the inside of the first discharge port 13, thereby improving the flexibility of solid waste screening.

[0023] Working principle: When in use; refer to Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, when it is necessary to screen the light solid waste (wood blocks or plastics) and heavy solid waste (concrete blocks or bricks) inside the screening machine 1, the first servo motor 35 drives the rotating rod 32 to rotate synchronously, and then the rotating rod 32 rotates to drive the spiral push frame 34 to rotate synchronously. At this time, the spiral push frame 34 rotates to push the waste inside the feed pipe 31 to move into the screening drum 12, and the solid waste inside the feed pipe 31 is pre-dispersed under the rotation of the spiral push frame 34, so that the light waste and the heavier waste are separated. The solid waste is separated and dispersed and discharged into the interior of the screening drum 12. During this process, the rotation of the rotating rod 32 drives the casing 33 to rotate synchronously. At this time, the rotation of the rotating rod 32 drives the three throwing rod frames 37 to rotate synchronously. At this time, the throwing rod frames 37 will fully lift or flip the solid waste, and during the stirring process of the rotating rod 32, the light waste will be thrown into the interior of the screening drum 12, while the heavier waste will fall faster due to its greater inertia, forming an obvious density difference, so that the light waste and the heavier waste will pass through the screening port of the screening drum 12 in a more dispersed manner.

[0024] refer to Figure 3 and Figure 4 As shown, when light and heavy solid waste are separated in advance inside the screening drum 12 and then the light and heavy solid waste passes through the screening drum 12, there is a height difference between the screening drum 12 and the light and heavy screening plate 21, which is used to extend the path of the solid waste falling on the surface of the light and heavy screening plate 21, and the blower 24 rotates the gas from the air inlet into its volute-shaped cavity and flows to the vicinity of the rotating impeller. The gas is then guided to the outlet inside the blower 24 and forms high-pressure gas, so that the high-pressure airflow is discharged from the outlet into the interior of the wind collecting shell 22. At this time, directional wind force is formed inside the wind collecting shell 22 and transported to the interior of the seven air outlet nozzles 23. Then the seven air outlet nozzles 23 generate wind force to the inside of the screening machine 1. As the wind force is used to blow the falling solid waste, the solid waste is affected by the wind force, so that the solid waste is separated into light and heavy during the falling process, and the heavier waste is discharged along the original trajectory.

[0025] refer to Figure 3 、 Figure 9 and Figure 10 As shown, when light and heavy solid wastes are separated between the screening drum 12 and the light and heavy screening plate 21, the light waste is blown toward the inside of the feed chamber 26 under the action of wind. At this time, the light waste slides along the inner wall of the feed chamber 26 to the deep inside thereof, and then the heavier waste falls on the surface of the light and heavy screening plate 21, and the light and heavy screening plate 21 re-sorts the heavier waste, and uses the subdivision component 6 to re-discharge the small particle waste inside the feed chamber 26 to the surface of the light and heavy screening plate 21, and then the light and heavy screening plate 21 re-screens the small particle waste, thereby improving the solid waste screening accuracy and effectively separating non-target waste.

[0026] refer to Figure 3 and Figure 7As shown, when the waste falls between the screening drum 12 and the light and heavy screening plates 21, and the air outlet nozzle 23 blows and separates the light and heavy waste, the throttling component 4 makes a circular reciprocating motion between the screening machine 1, the screening drum 12 and the light and heavy screening plates 21, so that the waste can be evenly distributed in the airflow action area, ensuring that after the throttling component 4 disperses the waste, the airflow can accurately act on the target waste, avoiding the increase of airflow resistance due to the dense waste, and reducing energy consumption.

[0027] The above description is only of certain exemplary embodiments of the present invention by way of illustration. It is undeniable that a person skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for screening construction solid waste, comprising a screening machine, a feed hopper, and a screening drum, wherein the top of the screening machine is provided with a first discharge port for discharging the material inside the screening drum, and the bottom of the screening machine is provided with a second discharge port for discharging the screened material, characterized in that: The screening machine is internally provided with a light and heavy screening assembly for re-screening the material screened by the screening drum. The light and heavy screening assembly includes a light and heavy screening plate installed inside the screening machine for vibrating and screening the material. One side of the screening machine is fixedly connected to a wind collecting shell communicated with the interior thereof. The wind collecting shell generates wind between the light and heavy screening plate and the screening drum to blow out the light material inside the fallen material. The top of the screening machine is provided with a pre-screening assembly for dispersing the material inside the feed hopper and the screening drum. The interior of the screening machine is provided with two symmetrical throttling assemblies, and the throttling assembly is used to disturb the waste material between the light and heavy screening plate and the screening drum.

2. The device for screening construction solid waste according to claim 1, characterized in that: The screening machine is fixedly connected to a distribution box on the side away from the air collecting shell, and the distribution box is arranged to be a volute structure. A material inlet cavity is commonly connected between the distribution box and the screening machine, and the material inlet cavity corresponds to the air collecting shell. A blower is fixedly connected to the outside of the air collecting shell, and the blower is used to generate wind force inside the air collecting shell. One side of the air collecting shell is fixedly connected to a plurality of air outlet nozzles communicated with the interior thereof. A third discharge port is provided on the side of the screening machine close to the light and heavy screening plate, and a subdivision component is provided on one side of the distribution box for re-discharging the residual material in the material inlet cavity into the surface of the light and heavy screening plate.

3. The device for screening construction solid waste according to claim 2, characterized in that: The subdivision component includes a subdivision rack fixedly connected to the inside of the material introduction cavity, and the subdivision rack is arranged in a trapezoidal structure. The material distribution box and the screening machine are commonly connected with two throwing pipes which are communicated with the inside thereof. Several fine material openings are commonly opened between the subdivision rack and the material distribution box, and the fine material openings are used to discharge the waste material inside the material introduction cavity into the inside of the throwing pipe. The top of the material distribution box is hinged with a closing plate which opens and closes with the inside thereof.

4. The device for screening construction solid waste according to claim 1, characterized in that: The pre-screening assembly includes a feed pipe fixedly connected between the feed hopper and the screening machine, a support frame is commonly connected between the feed pipe and the screening machine, a rotating rod is commonly connected between the support frame, the feed pipe and the screening machine, the outside of the rotating rod is fixedly sleeved with a sleeve, the outside of the rotating rod is fixedly sleeved with a spiral push rack, and the spiral push rack is located inside the feed pipe, a first servo motor is fixedly connected to one side of the support frame, and the first servo motor is used to drive the rotating rod to rotate.

5. The device for screening construction solid waste according to claim 4, characterized in that: The outside of the rotating rod is fixedly sleeved with a casing, and the casing is located inside the screening cylinder. The outside of the casing is fixedly connected with a plurality of throwing rod frames, and the throwing rod frames are arranged in an I-shaped structure.

6. The device for screening construction solid waste according to claim 1, characterized in that: The throttling assembly includes a positioning plate fixedly connected to the inside of the screening machine, two guide sliders are symmetrically connected to the outside of the positioning plate, two fixed columns are commonly connected between the two guide sliders, a disturbance rod is provided on one side of the two fixed columns, and the disturbance rod is used to contact the fallen waste, and a multi-directional assembly is provided between the fixed column and the positioning plate to drive the disturbance rod to move back and forth horizontally and up and down.

7. The device for screening construction solid waste according to claim 6, characterized in that: The multi-directional component includes a plurality of tooth-groove meshing columns fixedly connected to one side of the positioning plate, two fixed columns are rotatably connected to a ring gear frame meshed with the tooth-groove meshing columns on the side close to the positioning plate, a limiting plate is slidably connected between the two fixed columns, a second servo motor is fixedly connected to the side of the limiting plate away from the ring gear frame, and the second servo motor is used to drive the ring gear frame to rotate, and a quick-displacement component is provided between the limiting plate and the disturbance rod to drive the disturbance rod to rotate.

8. The device for screening construction solid waste according to claim 7, characterized in that: The quick-displacement assembly includes a centering slider slidably connected to one side of the fixed column, and the centering slider is sleeved on the outside of the second servo motor, the disturbance rod is fixedly connected to an ear column at one end close to the centering slider, and one side of the centering slider is fixedly connected to a centering frame, and the centering frame and the ear column are connected, and a plurality of ear plates are fixedly connected to the outside of the disturbance rod.

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