Vibrating screen for concrete treatment

Abstract

The invention discloses a vibrating screen for concrete treatment, which comprises a box body, a blanking mechanism, an upper vibrating screening mechanism, a lower vibrating screening mechanism, a vibrating mechanism, a supporting mechanism, a screen plate group and a controller, and the blanking mechanism, the upper vibrating screening mechanism and the lower vibrating screening mechanism are sequentially mounted on the box body from top to bottom; the upper vibration screening mechanism and the lower vibration screening mechanism each comprise a vibration mechanism, a supporting mechanism and a screen plate set, and the screen plate sets are arranged in a front-back sliding mode relative to the box body. The vibrating mechanism drives the sieve plate set to vibrate back and forth in a reciprocating mode to achieve screening, the sieve plate set is driven by controlling the supporting mechanism, and therefore the shape of the sieve plate set is changed, namely the sieve plate set is in an upwards-convex shape or a downwards-concave shape, and the shape of the sieve plate set of the lower vibrating screening mechanism is opposite to the shape of the sieve plate set of the upper vibrating screening mechanism. And the relative position of the guide shell relative to the discharging barrel can be changed by controlling the lifting mechanism to act.

Description

Technical Field

[0001] The present invention relates to a vibrating screen, in particular to a vibrating screen for concrete processing. Background Art

[0002] The raw materials for concrete primarily consist of cement, natural or artificial sand, crushed stone or pebbles, and water. The particle size of natural or artificial sand must be less than 4.75mm, while the particle size of crushed stone or pebbles must be larger than 4.75mm. These three components are collectively referred to as aggregates. During the raw material preparation process, a screening device is required to select the target aggregates. Vibrating screens are a common screening device.

[0003] The Chinese invention patent application number 202510383161.1 provides a sediment screening device for water conservancy projects, which "sets a first vibrating assembly and a second vibrating assembly so that the first screen can vibrate and screen the sediment with a large amplitude and low frequency, and the second screen can vibrate and screen the sediment with a low amplitude and high frequency, thereby improving the screening effect of sediments of different particle sizes" and "sets a first swing assembly and a second swing assembly to extend the screening time of the sediment on the first and second screens, thereby improving the screening effect of the sediment." First, the feed pipe of the device is The position relative to the position of the screening box remains unchanged, resulting in the position where the material falls to the first screen remaining basically unchanged. From the attached figure, it is close to the middle position of the first screen, which makes the wear degree of the middle part of the top of the first screen much greater than that of other parts, which is not conducive to the uniform and full utilization of the first screen and reduces the service life; second, the device is suitable for sediment screening. If it is used for screening aggregates, since the aggregates are relatively dry, it is easier to pile up after screening, and the gaps between them are larger, that is, it is not dense enough, which easily leads to waste of space and makes transportation and screening inconvenient, highlighting the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a vibrating screen for concrete processing, so as to solve the technical problems of uneven wear and insufficient utilization of the screening mechanism of the existing vibrating screen resulting in reduced service life and the technical problem of being unable to compact the material after screening to reduce the occupied space.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: The sieve plate group is a kind of sieve screen that is used for processing concrete, and comprises box body, feeding mechanism, upper vibrating screening mechanism, lower vibrating screening mechanism, vibrating mechanism, supporting mechanism, sieve plate group, and controller, and the box body is sequentially installed with feeding mechanism, upper vibrating screening mechanism and lower vibrating screening mechanism from top to bottom, and the upper vibrating screening mechanism and the lower vibrating screening mechanism respectively comprise vibrating mechanism, supporting mechanism and sieve plate group, and the sieve plate group is slidably arranged back and forth compared with the box body, and is supported by the supporting mechanism, and the vibrating mechanism can drive the supporting mechanism to drive the sieve plate group to vibrate back and forth to realize screening, and the sieve holes of the sieve plate group are arranged through up and down, and can be driven by the supporting mechanism to deform up and down into convex shape and concave shape, and the sieve plate group is extended in the front and back direction when it is convex or concave, and the screening accuracy of the sieve plate group of the lower vibrating screening mechanism is greater than the screening accuracy of the sieve plate group of the upper vibrating screening mechanism, and the feeding mechanism comprises a guide shell, a lower The material channel, the material discharge barrel, the lifting mechanism and the discharge port are respectively provided with a guide shell, and the left and right parts of the guide shell are respectively provided with a material discharge channel. The bottoms of the two material discharge channels are vertical, and the upper parts are upwardly converged. The guide shell is slidably connected to a vertical material discharge barrel, and the upper part of the material discharge barrel is downwardly gathered, and the bottom is vertical. The material discharge barrel is slidably connected to the upper part of the box body, and the guide shell and the material discharge barrel are jointly provided with a lifting mechanism, and the lifting mechanism is used to drive the material discharge barrel to move up and down compared with the guide shell. The bottom of the material discharge barrel is penetrated by the left and right discharge ports, and the discharge ports on the left and right parts of the material discharge barrel can be respectively connected with the two material discharge channels, and can be respectively located below the two material discharge channels and connected with the inner cavity of the box body. The vibration mechanism is driven by electricity, and the box body is fixed with a controller. The vibration mechanism is electrically connected to the controller, and the controller is externally powered.

[0006] On the basis of the above technical solution, a guide protrusion is fixed at the bottom of the discharge barrel, and the guide protrusion is in the shape of a ridge extending forward and backward with an acute top angle. The lifting mechanism is an electric push rod, and a vertical electric push rod is fixed to the front and rear parts of the guide shell. The push rods of the two electric push rods are respectively fixed to the front and rear parts of the discharge barrel, and are respectively electrically connected to the controller through surplus cables. When the electric push rod is extended and retracted, it can drive the discharge barrel to move up and down relative to the guide shell.

[0007] Based on the above technical solution, a support shaft is fixed to the bottom of the guide shell along the front-to-back direction, and the support shaft is coaxially connected to the support roller. A reduction motor is fixed to the front end of the box along the front-to-back direction, and the rotating shaft of the reduction motor is rotationally connected to the box, and a cam is coaxially fixed to its rotating shaft, and the cam rolls and rubs against the bottom of the support roller, and the reduction motor is electrically connected to the controller.

[0008] The cam is fixedly mounted on the left and right sides of the vehicle frame, and the cam is fixedly mounted on the vehicle frame, wherein the cam is fixedly mounted on the vehicle frame, wherein the cam is fixedly mounted on the vehicle frame. The sliding seat and the part near the middle of the box body are jointly fixed with a No. 1 tension spring, and each of the sliding seats has a tendency to approach each other left and right under the elastic tension of the No. 1 tension spring, and the sieve plate group includes a plurality of sieve plates installed in the support frame, and the vibration mechanism is used to drive the flower axis to vibrate back and forth, thereby driving the support frame and the sieve plate group to vibrate back and forth, and the box body is also equipped with two rotation drive mechanisms, each of the rotation drive mechanisms is used to drive the left and right corresponding hollow shafts in each support mechanism to rotate and brake, thereby changing the angle of the sieve plate, and the left and right ends of the support groove are flush with the left and right ends of the support frame, and the support grooves and support frames of the left and right parts of the support mechanism can contact each other under the indirect pull of the No. 1 tension spring and rotate under the indirect drive of the rotation drive mechanism to realize the convex and concave of the sieve plate group, and the left and right parts of the box body are each provided with two discharge buckets that penetrate left and right and tilt outward and downward, and the two discharge buckets of the left and right parts of the box body are respectively located obliquely below the support frame.

[0009] On the basis of the above technical solution, the rotary drive mechanism includes a gear reducer, a No. 1 speed regulating motor, an active bevel gear, a support seat, a transmission shaft, a worm, a driven bevel gear, a worm wheel, and a baffle. Two gear reducers are fixed on the right side of the housing. The transmission shaft of the gear reducer is arranged in the front-to-back direction, and the input shaft is arranged horizontally to the right. A No. 1 speed regulating motor is fixed on the right side of the gear reducer. The rotating shaft of the No. 1 speed regulating motor is coaxially fixed with the input shaft. A driving bevel gear is coaxially fixed to the front and rear parts of the transmission shaft of the gear reducer. Two groups of support seats are fixed on the housing from top to bottom, and multiple support seats corresponding horizontally are a group. The two groups of support seats are rotatably connected to two transmission shafts respectively. Each of the transmission shafts is axially slidably connected to a worm, and is divided into A driven bevel gear is coaxially fixed to each of the driving bevel gears, and the driving bevel gear is meshed with the driven bevel gear. A worm gear is coaxially fixed to each of the hollow shafts, and the worm gear is meshed with the worm. The No. 1 speed-regulating motor is electrically connected to the controller. When the No. 1 speed-regulating motor rotates, it is decelerated through a gear reducer. The meshing of the driving bevel gear and the driven bevel gear can make the two transmission shafts where a group of support seats are located rotate at the same time. When the two transmission shafts where the support seats are located are indirectly driven by the No. 1 speed-regulating motor and rotate at the same time, the meshing of the worm and the worm gear can make the hollow shafts on the left and right parts of the support mechanism rotate at the same speed and in opposite directions. Each sliding seat is fixed with a shielding plate, and each shielding plate is located in the box and blocks the guide groove.

[0010] On the basis of the above technical solution, a sieve plate is installed on the front and rear parts of each support frame, and a pin is fixed on the left and right ends of the middle part of the sieve plate. The pins on the left and right ends of the sieve plate are coaxially arranged, and the pins are rotatably connected to the support frame. The sieve plate can be flipped forward and backward under the push of external force through the rotation connection between the pin and the support frame. When the sieve plate is flipped to be parallel to the support frame, the support frame can be closed. The end of the sieve plate near the discharge bucket is threadedly connected with a detachable limiting bolt, and the limiting bolt is inserted into the support frame to limit the position of the sieve plate relative to the support frame. Two maintenance windows are penetrated on the left and right parts of the box body, and each maintenance window is located obliquely above each support frame, and the maintenance window is equipped with a shielding member that can be opened and closed.

[0011] On the basis of the above technical solution, the support groove can be in contact with the top of the discharge hopper, the shielding part includes a guide hopper, a fastening bolt, and a fastening screw hole, and each of the maintenance windows is hinged with a guide hopper on the left and right. The upper part of the guide hopper is vertical and the bottom is inclined and protruding toward the lower part of the box body. Fastening bolts are inserted through the left and right parts of the upper part of the guide hopper, and two fastening screw holes are penetrated through the left and right parts of the box body. The fastening bolts can be threadedly connected with the fastening screw holes to realize the closure of the guide hopper and the maintenance window. After the fastening bolts are disengaged from the fastening screw holes, the guide hopper can be opened relative to the maintenance window by manually shifting, and the support groove can be in contact with the bottom end of the guide hopper. The upper parts of the support grooves of the front and rear parts of the support frame are gathered downward toward the middle part of the support frame.

[0012] On the basis of the above technical solution, there are two vibration mechanisms, and the two vibration mechanisms are respectively used to drive the flower axes of the two groups of support mechanisms to vibrate back and forth. The vibration mechanism includes a mounting seat, a No. 2 speed regulating motor, a support plate, a guide seat, a slider, an adjusting bolt, a drag shaft, and a drag frame. Two mounting seats are fixed on the front end of the box body, and the two mounting seats are respectively fixed with a vertical No. 2 speed regulating motor. The rotating shafts of the two No. 2 speed regulating motors are respectively coaxially fixed with support plates. The two support plates are respectively rotatably connected to the mounting seats, and the top ends are respectively fixed with radial guide seats. The two guide seats are respectively horizontally slidably connected with sliders, and The two control wheels are connected in a rotationally-controlled manner, and the adjusting screws are threadedly connected to the slider and are rotatably connected to the guide seat. A vertical drag shaft is fixed to the top of the two sliders, and when the adjusting screws are rotated forward and reversely, the slider can slide back and forth horizontally along the guide seat, thereby changing the axial distance of the drag shaft relative to the support disk. The two drag shafts are rotatably connected to a horizontal drag rack, and the left and right parts of the drag rack are respectively slidably connected to the flower axis left and right. When the support disk rotates and the drag shaft is not coaxial with the support disk, the flower axis can be driven to reciprocate back and forth through the drag rack, and the two No. 2 speed regulating motors are electrically connected to the controller respectively.

[0013] On the basis of the above technical solution, the box body is penetrated by an upper opening and a lower opening from top to bottom in sequence, and a plurality of support beams are fixed in the box body along the front-to-back direction, the top end of the support beam is flush with the bottom end of the upper opening, and the upper opening and the lower opening are respectively located below the two supporting mechanisms, and the upper opening and the lower opening are respectively inserted into the front and back of the collecting troughs and can be detached forward, the bottom end of the collecting trough in the upper opening is in contact with the top end of the support beam, and the bottom end of the collecting trough in the lower opening is in contact with the bottom end of the inner wall of the box body, the front of the box body is hinged with a cover plate front and back, and is connected with a baffle for left and right rotation, the cover plate can completely cover the upper opening, the baffle is located in the front and upper part of the cover plate, and its rear end can interfere with the front end of the cover plate when the baffle naturally hangs down, and the interference with the front end of the cover plate can be released when the baffle is manually pushed upward.

[0014] The two gears are connected to each other by a spring, and the two gears are connected with each other by a spring, and the two gears are connected with each other by a spring, and the two gears are connected with each other by a spring.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention realizes screening by driving the screen plate group to vibrate back and forth by the vibration mechanism, realizes driving the screen plate group by controlling the support mechanism, thereby changing the shape of the screen plate group, that is, whether it is convex or concave, and makes the shape of the screen plate group of the lower vibrating screening mechanism opposite to the shape of the screen plate group of the upper vibrating screening mechanism, and by controlling the action of the lifting mechanism, the relative position of the guide shell relative to the discharge barrel can be changed, thereby controlling whether the discharge port is connected to the discharge channel or directly connected to the inner cavity of the box, and then changing the position where the material finally falls on the screen plate group, that is, the left and right parts and the middle part of the screen plate group can all receive the aggregate in the first time, making the wear more uniform than the prior art, and making the screen plate group more fully utilized; Open the shielding part and control the action of the rotary drive mechanism so that the part of the sieve plate connected with the limit bolt is close to the maintenance window. Then remove the limit bolt and manually turn the sieve plate with the pin as the axis so that the bottom end of the sieve plate becomes the top end. Then install the limit bolt so that the bottom end of the original sieve plate can also directly contact with the aggregate and be worn, so that the wear is more uniform, the utilization is more sufficient, and the service life is extended. By utilizing the counterclockwise rotation of the support plate and the intermittent engagement of the incomplete gear ring with the rack, the sliding frame can be moved forward intermittently. When the incomplete gear ring is disengaged from the rack, the sliding frame slides backward under the elastic tension of the No. 2 tension spring, thereby realizing the back and forth reciprocating sliding of the sliding frame, and then the pendulum moves and swings back and forth under the action of inertia. When the pendulum swings backward, it can knock on the transmission arm, causing the collection trough to vibrate, so that the aggregate in the collection trough is evenly distributed and more compact, reducing the waste of occupied space, and making the subsequent transportation and screening of the aggregate more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the axonometric structure of the present invention.

[0017] Figure 2 It is a front sectional structural schematic diagram of the present invention.

[0018] Figure 3 Schematic diagram of the cooperation between the support column and the sliding frame of the present invention.

[0019] Figure 4 It is a schematic diagram of the cooperation between the support frame and the screen plate of the present invention.

[0020] Figure 5 It is a front cross-sectional structural diagram of the guide housing and the discharge barrel of the present invention when they are matched.

[0021] Figure 6 Schematic diagram of the cooperation between the cover plate and the baffle of the present invention.

[0022] In the figure: 1. Box body, 8. Guide shell, 9. Discharge channel, 10. Discharge barrel, 12. Discharge outlet, 13. Controller, 14. Guide protrusion, 15. Electric push rod, 16. Support shaft, 17. Support roller, 18. Reducer motor, 19. Cam, 20. Guide groove, 21. Sliding seat, 22. Hollow shaft, 23. Flower shaft, 24. Support groove, 25. Support frame, 26. Memory foam, 27. No. 1 tension spring, 28. Sieve plate, 30. Discharge bucket, 31. Gear reducer, 32. No. 1 speed regulating motor, 33. Driving bevel gear, 34. Support seat, 35. Transmission shaft, 36. Worm, 37. Driven Bevel gear, 38. Worm gear, 39. Pin, 40. Limit bolt, 41. Maintenance window, 43. Guide hopper, 44. Fastening bolt, 45. Fastening screw hole, 46. Mounting seat, 47. No. 2 speed regulating motor, 48. Support plate, 49. Guide seat, 50. Slider, 51. Adjusting bolt, 52. Drag shaft, 53. Drag frame, 54. Upper through port, 55. Lower through port, 56. Support beam, 57. Collecting trough, 58. Cover plate, 59. Baffle, 60. Support column, 61. Sliding frame, 62. Rack, 63. No. 2 tension spring, 64. Incomplete gear ring, 65. Pendulum, 66. Transmission arm, 67. Shielding plate. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-6As shown, a vibrating screen for concrete processing includes a box body 1, a feeding mechanism, an upper vibrating screening mechanism, a lower vibrating screening mechanism, a vibration mechanism, a support mechanism, a screen plate group, and a controller 13. The box body 1 is sequentially equipped with a feeding mechanism, an upper vibrating screening mechanism, and a lower vibrating screening mechanism from top to bottom. The upper vibrating screening mechanism and the lower vibrating screening mechanism respectively include a vibration mechanism, a support mechanism, and a screen plate group. The screen plate group is arranged to slide back and forth relative to the box body 1 and is supported by the support mechanism. The vibrating mechanism The structure can drive the supporting mechanism to drive the screen plate group to vibrate back and forth to achieve screening. The screen holes of the screen plate group are arranged to pass through from top to bottom, and can be driven by the supporting mechanism to deform up and down to form an upper convex shape and a lower concave shape. When the screen plate group is in an upper convex shape or a lower concave shape, it is extended in the front-to-back direction. The screening accuracy of the screen plate group of the lower vibrating screening mechanism is greater than that of the screen plate group of the upper vibrating screening mechanism. The discharge mechanism includes a guide shell 8, a discharge channel 9, a discharge barrel 10, a lifting mechanism, and a discharge port 12. The upper The guide housing 8 is installed on the top, and the left and right parts of the guide housing 8 are each provided with a discharge channel 9. The bottoms of the two discharge channels 9 are vertical, and the upper parts are upwardly gathered. The guide housing 8 is connected to a vertical discharge barrel 10 by sliding up and down. The upper part of the discharge barrel 10 is downwardly gathered, and the bottom is vertical. The discharge barrel 10 is connected to the upper part of the box body 1 by sliding up and down. The guide housing 8 and the discharge barrel 10 are jointly equipped with a lifting mechanism, which is used to drive the discharge barrel 10 compared to the guide The shell 8 moves up and down, and the discharge outlet 12 is passed through the left and right sides of the bottom of the discharge barrel 10. The discharge outlets 12 on the left and right sides of the discharge barrel 10 can be respectively connected with the two discharge channels 9, and can be respectively located below the two discharge channels 9 and connected with the inner cavity of the box body 1. The vibration mechanism is driven by electricity, and the box body 1 is fixed with a controller 13. The vibration mechanism is electrically connected to the controller 13, and the controller 13 is an external power supply. The controller 13 is a known prior art, such as a single-chip microcomputer and an industrial computer.

[0025] When in use, the vibrating mechanism drives the screen plate group to vibrate back and forth to achieve screening, and the driving of the screen plate group is achieved by controlling the supporting mechanism, thereby changing the shape of the screen plate group, that is, whether it is convex or concave, and making the shape of the screen plate group of the lower vibrating screening mechanism opposite to the shape of the screen plate group of the upper vibrating screening mechanism, and by controlling the action of the lifting mechanism, the relative position of the guide shell 8 relative to the discharge barrel 10 can be changed, thereby controlling whether the discharge port 12 is connected to the discharge channel 9 or directly connected to the inner cavity of the box body 1, and then changing the position where the material finally falls on the screen plate group. Specifically, when the screen plate group of the upper vibrating screening mechanism is concave, the screen plate group of the lower vibrating screening mechanism is convex, and the discharge port 12 is connected to the discharge channel 9. At this time, the aggregate passes through the lower The material channel 9 discharges and falls to the left and right parts of the screen plate group, and then the aggregate moves to the middle of the screen plate group under the action of gravity, and screening is achieved during the movement. After passing through the sieve holes, the aggregate falls to the screen plate group below, and moves from the middle to the left and right parts under the action of gravity for more fine screening; when the screen plate group of the upper vibrating screening mechanism is convex, the screen plate group of the lower vibrating screening mechanism is concave, and the discharge port 12 is directly connected to the inner cavity of the box body 1. At this time, the aggregate is discharged through the discharge barrel 10 and falls to a position near the middle of the screen plate group, and then the aggregate moves to the left and right parts of the screen plate group under the action of gravity, and screening is achieved during the movement. After passing through the sieve holes, the aggregate falls to the screen plate group below, and moves from the left and right parts to the middle part under the action of gravity for more fine screening. In other words, this allows the left and right parts or the middle part of the screen plate group to receive the aggregate in the first place, making the wear more uniform than the existing technology, and making the screen plate group more fully utilized.

[0026] A guide protrusion 14 is fixed to the bottom of the discharge barrel 10, and the guide protrusion 14 is in the shape of a ridge extending forward and backward with an acute top angle. The lifting mechanism is an electric push rod 15, and a vertical electric push rod 15 is fixed to the front and rear parts of the guide shell 8. The push rods of the two electric push rods 15 are respectively fixed to the front and rear parts of the discharge barrel 10, and are respectively electrically connected to the controller 13 through surplus cables. When the electric push rod 15 is extended and retracted, it can drive the discharge barrel 10 to move up and down relative to the guide shell 8.

[0027] Furthermore, the guide protrusion 14 can separate the aggregate to the left and right sides when passing through this place, and the sharp-angled ridge-like structure allows the aggregate to be closer to the middle of the sieve plate group when it is discharged through the discharge port 12 and directly falls onto the sieve plate group. The controller 13 controls the extension and retraction of the electric push rod 15 to adjust the relative position of the guide shell 8 and the discharge barrel 10, and then the discharge port 12 is connected to the discharge channel 9 or directly connected to the inner cavity of the box body 1.

[0028] A support shaft 16 is fixed to the bottom of the guide shell 8 along the front-to-back direction, and the support shaft 16 is coaxially connected to a support roller 17. A reduction motor 18 is fixed to the front end of the box body 1 along the front-to-back direction, and the rotating shaft of the reduction motor 18 is rotationally connected to the box body 1, and a cam 19 is coaxially fixed to its rotating shaft. The cam 19 rolls and rubs with the bottom of the support roller 17, and the reduction motor 18 is electrically connected to the controller 13.

[0029] Furthermore, by controlling the reduction motor 18 to rotate, the cam 19 and the support roller 17 can be used to cooperate to realize the up and down movement of the support shaft 16 and the guide shell 8, and further transmit it to the discharge barrel 10 through the lifting mechanism to move up and down, thereby avoiding the blockage and accumulation of aggregate in the discharge channel 9 or the discharge barrel 10, so that the screening work can proceed smoothly.

[0030] The support mechanism includes a guide groove 20, a sliding seat 21, a hollow shaft 22, a flower shaft 23, a support groove 24, a support frame 25, a memory sponge 26, a No. 1 tension spring 27, a screen plate 28, a rotary drive mechanism, and a discharge bucket 30. The left and right parts of the box body 1 are each penetrated by two groups of guide grooves 20 in front and back. The two guide grooves 20 corresponding to each other in the front and back parts of the box body 1 are a group, and each group of the guide grooves 20 is respectively connected to the sliding seat 21 for sliding left and right. The sliding seat 21 corresponding to each group of the guide grooves 20 is a group, and each group of the sliding seats 21 are respectively in the front and back. The hollow shaft 22 is connected to the rear direction of rotation, and the hollow shaft 22 of each group of sliding seats 21 is connected to the flower shaft 23 in an axial sliding manner. The adjacent ends of each hollow shaft 22 are radially fixed with a support groove 24, and the middle of each flower shaft 23 is radially fixed with a support frame 25. The support frame 25 is connected to the support grooves 24 on the front and rear sides in a front-to-back sliding manner. The left and right parts of the inner wall of the support groove 24 are respectively fixed with memory sponges 26. The memory sponge 26 is always filled in the gap between the support groove 24 and the support frame 25 and is in contact with the support groove 24 and the support frame. The support frame 25 is always in contact, and the sliding seat 21 and the part near the middle of the box body 1 are fixed with a tension spring 27. Each of the sliding seats 21 has a tendency to approach each other left and right under the elastic tension of the tension spring 27. The sieve plate group includes a plurality of sieve plates 28 installed in the support frame 25. The vibration mechanism is used to drive the flower axis 23 to vibrate back and forth, thereby driving the support frame 25 and the sieve plate group to vibrate back and forth. The box body 1 is also equipped with two rotation drive mechanisms, each of which is used to drive the left and right corresponding parts of each support mechanism. The hollow shaft 22 is rotated and braked to change the angle of the sieve plate 28. The left and right ends of the support groove 24 are flush with the left and right ends of the support frame 25. The support grooves 24 and the support frame 25 on the left and right parts of the support mechanism can contact each other under the indirect pull of the No. 1 tension spring 27 and rotate under the indirect drive of the rotary drive mechanism to realize the convex and concave of the sieve plate group. The left and right parts of the box body 1 are respectively provided with two discharge buckets 30 that penetrate the left and right and are inclined outward and downward. The two discharge buckets 30 on the left and right parts of the box body 1 are respectively located obliquely below the support frame 25.

[0031] Furthermore, the hollow shaft 22 is driven by a rotary drive mechanism to rotate or brake, thereby driving the support groove 24, the flower axis 23, the support frame 25 and the sieve plate 28 to rotate or brake, thereby changing the shape of the sieve plate group, that is, convex or concave. In the process of changing the shape, the No. 1 tension spring 27 is used to pull the sliding seat 21, so that the support groove 24 and the support frame 25 on the left and right parts of the box body 1 can be close to each other and contact each other, thereby reducing the leakage of aggregate from the middle part of the concave sieve plate group and ensuring the accuracy of screening. When the sieve plate group is convex, the left and right parts of the sieve plate group are located above the discharge bucket 30. At this time, the aggregate that has not passed through the sieve hole can be discharged through the discharge bucket 30 under the action of gravity, that is, separation and impurity removal are achieved, and the memory sponge 26 is used to block the space between the support groove 24 and the support frame 25 to reduce the entry of aggregate.

[0032] The rotary drive mechanism includes a gear reducer 31, a No. 1 speed regulating motor 32, a driving bevel gear 33, a support seat 34, a transmission shaft 35, a worm 36, a driven bevel gear 37, a worm wheel 38, and a baffle 67. Two gear reducers 31 are fixed on the right side of the housing 1. The transmission shaft 35 of the gear reducer 31 is arranged in the front-to-back direction, and the input shaft is arranged horizontally to the right. The No. 1 speed regulating motor 32 is fixed on the right side of the gear reducer 31. The rotating shaft of the No. 1 speed regulating motor 32 is coaxially fixed with the input shaft. The front and rear parts of the transmission shaft 35 of the gear reducer 31 are coaxially fixed with a driving bevel gear 33. Two groups of support seats 34 are fixed on the housing 1 from top to bottom. Multiple support seats 34 corresponding horizontally are a group. The two groups of support seats 34 are rotatably connected to two transmission shafts 35 respectively. Each of the transmission shafts 35 is axially slidably connected to a worm 36 and is coaxially fixed with The driven bevel gear 37, the active bevel gear 33 is meshed with the driven bevel gear 37, and each of the hollow shafts 22 is coaxially fixed with a worm gear 38, and the worm gear 38 is meshed with the worm 36, and the No. 1 speed regulating motor 32 is electrically connected to the controller 13. When the No. 1 speed regulating motor 32 rotates, it is decelerated by the gear reducer 31. The meshing of the active bevel gear 33 and the driven bevel gear 37 can make a group of two transmission shafts 35 where the support seat 34 is located rotate at the same time. When the two transmission shafts 35 where the support seat 34 is located are indirectly driven by the No. 1 speed regulating motor 32 and rotate at the same time, the meshing of the worm 36 and the worm gear 38 can make the hollow shafts 22 on the left and right parts of the support mechanism rotate at the same speed and in opposite directions. Each of the sliding seats 21 is fixed with a shielding plate 67, and each of the shielding plates 67 is located in the box body 1 and blocks the guide groove 20.

[0033] The worm gear 33 is engaged with the driven bevel gear 37, thereby driving the transmission shaft 35 to rotate forward and backward, thereby driving the worm 36 to rotate forward and backward, thereby utilizing the engagement of the worm 36 with the worm wheel 38 to make the hollow shaft 22 rotate forward and backward, thereby further driving the support groove 24, the flower axis 23, the support frame 25 and the sieve plate 28 to rotate forward and backward, thereby changing the shape of the sieve plate group. When the sliding seat 21 moves left and right, the self-locking property of the worm 36 and the worm wheel 38 is utilized to enable the worm 36 and the worm wheel 38 to move left and right together, which can not only ensure the left and right movement of the sliding seat 21, but also ensure the accuracy of the transmission of the worm wheel 38 and the worm 36, and avoid the worm wheel 38 from rotating accidentally, that is, ensuring the controllable and reliable shape of the sieve plate group.

[0034] The sieve plate 28 is mounted on each of the front and rear portions of the support frame 25, and a pin 39 is fixed to each of the left and right ends of the middle portion of the sieve plate 28. The pins 39 at the left and right ends of the sieve plate 28 are coaxially arranged, and the pins 39 are rotatably connected to the support frame 25. The sieve plate 28 is rotatably connected to the support frame 25 through the pin 39 and can be flipped forward and backward under the push of an external force. When the sieve plate 28 is flipped to be parallel to the support frame 25, the support frame 25 can be closed and sealed. The end of the sieve plate 28 near the discharge bucket 30 is threadedly connected to a detachable limiting bolt 40, and the limiting bolt 40 is inserted through the support frame 25 to limit the position of the sieve plate 28 relative to the support frame 25. Two maintenance windows 41 are respectively passed through the left and right portions of the box body 1. Each of the maintenance windows 41 is located obliquely above each support frame 25, and the maintenance window 41 is equipped with a shielding member that can be opened and closed.

[0035] Furthermore, the shielding member is opened, and then the rotation drive mechanism is controlled to move so that the portion of the sieve plate 28 threadedly connected with the limiting bolt 40 is close to the maintenance window 41, and then the limiting bolt 40 is removed, and the sieve plate 28 is manually flipped around the pin shaft 39 as the axis, so that the bottom end of the sieve plate 28 becomes the top end, and then the limiting bolt 40 is installed, so that the bottom end of the original sieve plate 28 can also directly contact the aggregate and be subject to wear, thereby making the wear more uniform, the utilization more complete, and extending the service life.

[0036] The support groove 24 can be in contact with the top of the discharge bucket 30, and the shielding member includes a guide hopper 43, a fastening bolt 44, and a fastening screw hole 45. A guide hopper 43 is hinged on the left and right at each of the maintenance windows 41. The upper part of the guide hopper 43 is vertical and the bottom is inclined and protruding toward the lower part of the box body 1. Fastening bolts 44 are inserted through the left and right parts of the upper part of the guide hopper 43. Two fastening screw holes 45 are penetrated on the left and right parts of the box body 1. The fastening bolts 44 can be threadedly connected with the fastening screw holes 45 to realize the closure of the guide hopper 43 and the maintenance window 41. After the fastening bolts 44 are disengaged from the fastening screw holes 45, the guide hopper 43 can be opened relative to the maintenance window 41 by manually shifting. The support groove 24 can be in contact with the bottom end of the guide hopper 43, and the upper parts of the support grooves 24 of the front and rear parts of the support frame 25 are gathered downward toward the middle part of the support frame 25.

[0037] Furthermore, by removing the fastening bolts 44 with tools such as a wrench, the guide hopper 43 can be manually pushed to open the maintenance window 41, thereby facilitating manual operation of the limit bolts 40 and the screen plate 28. After the operation is completed, the guide hopper 43 is manually reset, and then the threaded connection between the fastening bolts 44 and the fastening screw holes 45 is restored to restore the blockage of the maintenance window 41. The inclined protruding part at the bottom of the guide hopper 43 can guide the falling aggregate so that the aggregate flows to the screen plate group to be screened, thereby ensuring the screening effect. The support groove 24 can also guide the falling aggregate from the front and back directions to the middle, so that the aggregate flows to the screen plate group to be screened.

[0038] There are two vibration mechanisms, and the two vibration mechanisms are respectively used to drive the flower shafts 23 of the two groups of support mechanisms to vibrate back and forth. The vibration mechanism includes a mounting seat 46, a second speed regulating motor 47, a support plate 48, a guide seat 49, a slider 50, an adjusting bolt 51, a drag shaft 52, and a drag frame 53. Two mounting seats 46 are fixed at the front end of the box body 1. The two mounting seats 46 are respectively fixed with a vertical second speed regulating motor 47. The rotating shafts of the two second speed regulating motors 47 are respectively coaxially fixed with support plates 48. The two support plates 48 are respectively rotatably connected to the mounting seats 46, and the top ends are respectively fixed with radial guide seats 49. The two guide seats 49 are respectively horizontally slidably connected with sliders 50, and are respectively rotatably connected with the adjusting The joint bolt 51, the adjusting bolt 51 is threadedly connected to the slider 50 and is rotatably connected to the guide seat 49. A vertical drag shaft 52 is fixed to the top of the two sliders 50. When the adjusting bolt 51 rotates forward and backward, the slider 50 can slide back and forth horizontally along the guide seat 49, thereby changing the axial distance of the drag shaft 52 relative to the support disk 48. The two drag shafts 52 are rotatably connected to a horizontal drag rack 53. The left and right parts of the drag rack 53 are respectively slidably connected to the flower shaft 23. When the support disk 48 rotates and the drag shaft 52 is not coaxial with the support disk 48, the drag rack 53 can drive the flower shaft 23 to move back and forth. The two No. 2 speed regulating motors 47 are electrically connected to the controller 13 respectively.

[0039] Furthermore, by manually rotating the adjusting bolt 51 with a tool such as a wrench, the slider 50 can be moved along the guide seat 49, thereby adjusting the distance between the drag shaft 52 and the virtual axis of the support plate 48. The size of this distance determines the vibration amplitude of the subsequent back and forth vibration of the screen plate 28, that is, by controlling the rotation of the No. 2 speed-regulating motor 47, the support plate 48, the guide seat 49 and the slider 50 can be used to drive the drag shaft 52 to move circumferentially, thereby using the drag frame 53 to drive the flower axis 23 to move back and forth, and then drive the support frame 25 and the screen plate 28 to vibrate back and forth, that is, to achieve vibration screening, and the speed of the No. 2 speed-regulating motor 47 determines the frequency of vibration. For example, the screening method in the patent document mentioned in the background technology is used, and the screen plate 28 at the upper part of the box body 1 is screened with a large amplitude and low frequency, while the screen plate 28 at the lower part of the box body 1 is screened with a small amplitude and high frequency, so as to achieve a relatively good screening effect for aggregates with different particle sizes.

[0040] The box body 1 is sequentially penetrated from top to bottom with an upper opening 54 and a lower opening 55, and a plurality of support beams 56 are fixed in the box body 1 along the front-to-back direction. The top of the support beam 56 is flush with the bottom of the upper opening 54. The upper opening 54 and the lower opening 55 are respectively located below the two support mechanisms. The upper opening 54 and the lower opening 55 are respectively inserted into the front and back and can be detached forward. The bottom of the collection groove 57 in the upper opening 54 is flush with the top of the support beam 56. The bottom end of the collecting trough 57 in the lower opening 55 is in close contact with the bottom end of the inner wall of the box body 1. The front of the box body 1 is hinged with a cover plate 58, and is connected with a baffle 59 for left and right rotation. The cover plate 58 can completely cover the upper opening 54. The baffle 59 is located above and in front of the cover plate 58. When the baffle 59 falls naturally, its rear end can interfere with the front end of the cover plate 58. When the baffle 59 is manually pushed upward, the interference with the front end of the cover plate 58 can be eliminated.

[0041] Furthermore, according to the needs of use, the aggregate screened by the upper vibrating screening mechanism can be directly taken. At this time, the cover 58 is opened and the collecting trough 57 is inserted into the upper opening 54. When it is not taken, when it is necessary to use the lower vibrating screening mechanism for screening again, the collecting trough 57 is pulled out from the upper opening 54, and then the cover 58 is manually flipped upward to cover the upper opening 54. During this period, the baffle 59 is manually moved upward to avoid interference with the covering of the cover 58. After the covering is completed, the baffle 59 is stopped from being moved, so that the baffle 59 falls naturally, thereby achieving resistance to the cover 58, so as to maintain the covering of the cover 58 and the upper opening 54, and avoid accidental leakage of aggregate.

[0042] Two groups of horizontal support columns 60 are fixed to the front end of the box body 1. The support columns 60 are arranged horizontally in the front and rear directions, and the left and right corresponding supports 60 are a group. The two groups of support columns 60 are respectively connected to the sliding frame 61 for sliding forward and backward. The two sliding frames 61 are respectively fixed with racks 62 along the front and rear directions. A second tension spring 63 is respectively fixed between the two sliding frames 61 and the two groups of support columns 60. The sliding frame 61 has a tendency to move backward under the elastic tension of the second tension spring 63. The outer circumferential walls of the two support plates 48 are respectively coaxially fixed with incomplete teeth. Ring 64, the two incomplete gear rings 64 are intermittently meshed with the two racks 62 respectively, and the left and right parts of the sliding frame 61 are each hinged with a pendulum 65 front and back, and the virtual hinge axis of the pendulum 65 is set horizontally left and right. The left and right parts of the front end of the two collecting troughs 57 are each fixed with a transmission arm 66. The sliding frame 61 can drive the pendulum 65 to swing back and forth when it moves back and forth, and the pendulum 65 can knock on the transmission arm 66 when it swings backward. When the pendulum 65 is manually pushed upward, it can stay away from the transmission arm 66 so as not to interfere with the front and rear movement of the collecting trough 57.

[0043] Furthermore, when the collecting trough 57 is inserted into the upper opening 54 or the lower opening 55, the counterclockwise rotation of the support plate 48 (viewed from a top-down angle) can be utilized, and the intermittent engagement of the incomplete gear ring 64 with the rack 62 can enable the sliding frame 61 to intermittently move forward. When the incomplete gear ring 64 is disengaged from the rack 62, the sliding frame 61 slides backward under the elastic tension of the No. 2 tension spring 63, thereby realizing the back-and-forth reciprocating sliding of the sliding frame 61, and then the pendulum 65 moves and swings back and forth under the action of inertia. When the pendulum 65 swings backward, it can knock on the transmission arm 66, causing the collecting trough 57 to vibrate, so as to make the aggregate in the collecting trough 57 evenly distributed and more compact, reduce the waste of occupied space, and make the subsequent transportation and screening of the aggregate more convenient.

[0044] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A vibrating screen for concrete processing, comprising a housing (1), a feeding mechanism, an upper vibrating screening mechanism, a lower vibrating screening mechanism, a vibrating mechanism, a supporting mechanism, a screen plate group, and a controller (13), characterized in that: The box body (1) is sequentially provided with a feeding mechanism, an upper vibrating screening mechanism and a lower vibrating screening mechanism from top to bottom. The upper vibrating screening mechanism and the lower vibrating screening mechanism respectively include a vibrating mechanism, a supporting mechanism and a screen plate group. The screen plate group is arranged to slide forward and backward compared to the box body (1) and is supported by the supporting mechanism. The vibrating mechanism can drive the supporting mechanism to drive the screen plate group to vibrate forward and backward to achieve screening. The screen holes of the screen plate group are arranged to penetrate up and down and can be driven by the supporting mechanism to deform up and down into an upper convex shape and a lower concave shape. When the screen plate group is in an upper convex shape or a lower concave shape, it is extended in the front-to-back direction. The screening accuracy of the screen plate group of the lower vibrating screening mechanism is greater than the screening accuracy of the screen plate group of the upper vibrating screening mechanism. The feeding mechanism includes a guide shell (8), a feeding channel (9), a feeding barrel (10), a lifting mechanism and a discharge port (12). The guide shell (8) is installed on the upper inner part of the box body (1). The left and right parts of the guide shell (8) are each provided with a feeding channel (9). The bottoms of the two discharge channels (9) are vertical, and the upper parts are upwardly gathered together. The guide housing (8) is slidably connected to a vertical discharge barrel (10). The upper part of the discharge barrel (10) is downwardly gathered, and the bottom is vertical. The discharge barrel (10) is slidably connected to the upper part of the box body (1). The guide housing (8) and the discharge barrel (10) are jointly equipped with a lifting mechanism. The lifting mechanism is used to drive the discharge barrel (10) to move up and down relative to the upper part of the guide housing (8). The discharge barrel (10) moves downward, and the left and right sides of the bottom of the discharge barrel (10) are penetrated by discharge outlets (12). The discharge outlets (12) on the left and right sides of the discharge barrel (10) can be respectively connected to the two discharge channels (9), and can be respectively located below the two discharge channels (9) and connected to the inner cavity of the box body (1). The vibration mechanism is driven by electricity, and a controller (13) is fixed to the box body (1). The vibration mechanism is electrically connected to the controller (13), and the controller (13) is externally connected to a power supply.

2. A vibrating screen for concrete processing according to claim 1, characterized in that: A guide protrusion (14) is fixed to the bottom of the discharge barrel (10), and the guide protrusion (14) is in the shape of a ridge extending forward and backward with an acute top angle. The lifting mechanism is an electric push rod (15), and a vertical electric push rod (15) is fixed to the front and rear parts of the guide shell (8). The push rods of the two electric push rods (15) are respectively fixed to the front and rear parts of the discharge barrel (10), and are respectively electrically connected to the controller (13) through surplus cables. When the electric push rod (15) is extended and retracted, it can drive the discharge barrel (10) to move up and down relative to the guide shell (8).

3. A vibrating screen for concrete processing according to claim 2, characterized in that: A support shaft (16) is fixed to the bottom of the guide housing (8) along the front-to-back direction, and the support shaft (16) is coaxially connected to a support roller (17). A reduction motor (18) is fixed to the front end of the box body (1) along the front-to-back direction, and the rotating shaft of the reduction motor (18) is rotationally connected to the box body (1), and a cam (19) is coaxially fixed to the rotating shaft. The cam (19) rolls and rubs against the bottom of the support roller (17), and the reduction motor (18) is electrically connected to the controller (13).

4. A vibrating screen for concrete processing according to claim 3, characterized in that: The support mechanism includes a guide groove (20), a sliding seat (21), a hollow shaft (22), a flower shaft (23), a support groove (24), a support frame (25), a memory sponge (26), a No. 1 tension spring (27), a screen plate (28), a rotary drive mechanism, and a discharge bucket (30). The left and right parts of the box body (1) are each penetrated by two groups of guide grooves (20) in front and back. The two guide grooves (20) corresponding to each other in the front and back parts of the box body (1) form a group. Each group of the guide grooves (20) is respectively connected to the sliding seat (21) in a left and right sliding manner. The sliding seat (21) corresponding to each group of the guide grooves (20) forms a group. The seats (21) are connected to hollow shafts (22) that rotate in the front-back direction, and the hollow shafts (22) of each group of the sliding seats (21) are connected to the flower shafts (23) in a common axial sliding manner. The adjacent ends of each hollow shaft (22) are radially fixed with support grooves (24), and the middle of each flower shaft (23) is radially fixed with a support frame (25). The support frame (25) is connected to the support grooves (24) on the front and back sides in a front-back sliding manner. The left and right parts of the inner wall of the support groove (24) are fixed with memory sponges (26), and the memory sponges (26) always fill the gap between the support groove (24) and the support frame (25). The sliding seat (21) and the box body (1) are always in contact with the support groove (24) and the support frame (25). The sliding seat (21) and the box body (1) near the middle are fixed with a tension spring (27). Each of the sliding seats (21) has a tendency to move closer to each other left and right under the elastic tension of the tension spring (27). The sieve plate group includes a plurality of sieve plates (28) installed in the support frame (25). The vibration mechanism is used to drive the flower axis (23) to vibrate back and forth, thereby driving the support frame (25) and the sieve plate group to vibrate back and forth. The box body (1) is also equipped with two rotation drive mechanisms, each of which is used to drive the left and right of each support mechanism. The hollow shafts (22) corresponding to each other on the right rotate and brake to change the angle of the screen plate (28). The left and right ends of the support groove (24) are flush with the left and right ends of the support frame (25). The support grooves (24) and the support frame (25) on the left and right parts of the support mechanism can contact each other under the indirect pulling of the No. 1 tension spring (27) and rotate under the indirect driving of the rotary drive mechanism to realize the convexity and concavity of the screen plate group. The left and right parts of the box body (1) are respectively provided with two discharge buckets (30) that penetrate left and right and are inclined outward and downward. The two discharge buckets (30) on the left and right parts of the box body (1) are respectively located obliquely below the support frame (25).

5. A vibrating screen for concrete processing according to claim 4, characterized in that: The rotary drive mechanism comprises a gear reducer (31), a first speed regulating motor (32), a driving bevel gear (33), a support base (34), a transmission shaft (35), a worm (36), a driven bevel gear (37), a worm wheel (38), and a shielding plate (67). Two gear reducers (31) are fixed to the right side of the housing (1). The transmission shafts (35) of the gear reducers (31) are arranged in a front-to-back direction, and the input shafts are arranged horizontally to the right. The first speed regulating motor is fixed to the right side of the gear reducer (31). (32), the rotating shaft of the first speed regulating motor (32) is coaxially fixed with the input shaft, the front and rear parts of the transmission shaft (35) of the gear reducer (31) are coaxially fixed with an active bevel gear (33), and the housing (1) is fixed with two groups of support seats (34) from top to bottom, and a plurality of support seats (34) corresponding to the horizontal are a group, and the two groups of support seats (34) are respectively rotatably connected to two transmission shafts (35), and each of the transmission shafts (35) is respectively axially slidably connected to a worm (36), and is respectively coaxially fixed with The driven bevel gear (37) is meshed with the driving bevel gear (33), and each of the hollow shafts (22) is coaxially fixed with a worm gear (38), and the worm gear (38) is meshed with the worm (36). The first speed regulating motor (32) is electrically connected to the controller (13). When the first speed regulating motor (32) rotates, it is decelerated by the gear reducer (31). The meshing of the driving bevel gear (33) and the driven bevel gear (37) enables a group of support seats (34) to be located. The two transmission shafts (35) of the support seat (34) rotate simultaneously, and the two transmission shafts (35) of a group of support seats (34) are indirectly driven by the first speed regulating motor (32) and rotate simultaneously. Through the engagement of the worm (36) and the worm wheel (38), the hollow shafts (22) on the left and right sides of the support mechanism can rotate at the same speed but in opposite directions. Each of the sliding seats (21) is fixed with a shielding plate (67), and each of the shielding plates (67) is located in the box body (1) and shields the guide groove (20).

6. A vibrating screen for concrete processing according to claim 5, characterized in that: Each of the front and rear parts of each support frame (25) is equipped with a sieve plate (28), and a pin shaft (39) is fixed to the left and right ends of the middle part of the sieve plate (28). The pin shafts (39) at the left and right ends of the sieve plate (28) are coaxially arranged, and the pin shafts (39) are rotatably connected to the support frame (25). The sieve plate (28) can be turned forward and backward under the push of an external force through the rotatable connection with the support frame (25). When the sieve plate (28) is turned to be parallel to the support frame (25), it can rotate with the support frame (25). ) is closed, the end of the sieve plate (28) near the discharge bucket (30) is threadedly connected with a detachable limiting bolt (40), and the limiting bolt (40) is inserted into the support frame (25) to limit the position of the sieve plate (28) relative to the support frame (25), and the left and right parts of the box body (1) are respectively penetrated by two maintenance windows (41), and each maintenance window (41) is located obliquely above each support frame (25), and the maintenance window (41) is installed with a shielding member that can be opened and closed.

7. A vibrating screen for concrete processing according to claim 6, characterized in that: The support groove (24) can contact the top of the discharge bucket (30), and the shielding member includes a guide hopper (43), a fastening bolt (44), and a fastening screw hole (45). Each of the maintenance windows (41) is hinged with a guide hopper (43) on the left and right. The upper part of the guide hopper (43) is vertical and the bottom is inclined and protruding toward the lower part of the box body (1). The upper part of the guide hopper (43) is penetrated by fastening bolts (44) on the left and right. The left and right parts of the box body (1) each have two fastening screw holes (45) on the left and right. 5), the fastening bolt (44) can be threadedly connected with the fastening screw hole (45) to realize the closure of the guide hopper (43) and the maintenance window (41), and after the fastening bolt (44) is disengaged from the fastening screw hole (45), the guide hopper (43) can be opened relative to the maintenance window (41) by manually shifting, and the support groove (24) can be in contact with the bottom end of the guide hopper (43), and the upper parts of the support grooves (24) at the front and rear parts of the support frame (25) are in a downward convergence shape toward the middle part of the support frame (25).

8. The vibrating screen for concrete processing according to claim 7, characterized in that: The number of the vibration mechanisms is two, and the two vibration mechanisms are respectively used to drive the flower shafts (23) of the two groups of support mechanisms to vibrate forward and backward. The vibration mechanisms include a mounting seat (46), a second speed regulating motor (47), a support plate (48), a guide seat (49), a slider (50), an adjusting bolt (51), a drag shaft (52), and a drag frame (53). The front end of the box (1) is fixed with two mounting seats (46), the two mounting seats (46) are respectively fixed with a vertical second speed regulating motor (47), the rotating shafts of the two second speed regulating motors (47) are respectively coaxially fixed with a support plate (48), the two support plates (48) are respectively rotatably connected to the mounting seat (46), and the top ends are respectively fixed with a radial guide seat (49), the two guide seats (49) are respectively horizontally slidably connected with a slider (50), and are respectively rotatably connected with an adjusting screw Bolt (51), the adjusting bolt (51) is threadedly connected to the slider (50) and is rotatably connected to the guide seat (49), and the tops of the two sliders (50) are respectively fixed with vertical drag shafts (52), and when the adjusting bolt (51) rotates forward and reverse, the slider (50) can slide back and forth horizontally along the guide seat (49), thereby changing the axial distance of the drag shaft (52) relative to the support disk (48), and the two drag shafts (52) are respectively rotatably connected with a horizontal drag rack (53), and the left and right parts of the drag rack (53) are respectively connected to the flower axis (23) for left and right sliding. When the support disk (48) rotates and the drag shaft (52) is not coaxial with the support disk (48), the flower axis (23) can be driven to move back and forth through the drag rack (53), and the two second speed regulating motors (47) are respectively electrically connected to the controller (13).

9. The vibrating screen for concrete processing according to claim 8, characterized in that: The box body (1) is penetrated by an upper opening (54) and a lower opening (55) in sequence from top to bottom. A plurality of support beams (56) are fixed in the box body (1) along the front-to-back direction. The top of the support beam (56) is flush with the bottom of the upper opening (54). The upper opening (54) and the lower opening (55) are respectively located below two supporting mechanisms. The upper opening (54) and the lower opening (55) are respectively provided with a collecting trough (57) which is plugged in front and back and can be detached forward. The bottom of the collecting trough (57) in the upper opening (54) is flush with the top of the support beam (56). The bottom end of the collecting trough (57) in the lower opening (55) is in contact with the bottom end of the inner wall of the box body (1). The front of the box body (1) is hinged with a cover plate (58) at the front and rear, and is connected to a baffle plate (59) for left and right rotation. The cover plate (58) can completely cover the upper opening (54). The baffle plate (59) is located above and in front of the cover plate (58). When the baffle plate (59) naturally falls, its rear end can contact with the front end of the cover plate (58). When the baffle plate (59) is manually pushed upward, the contact with the front end of the cover plate (58) can be released.

10. The vibrating screen for concrete processing according to claim 9, characterized in that: Two groups of horizontal support columns (60) are fixed at the front end of the box body (1). The support columns (60) are arranged horizontally in the front and rear directions, and the left and right support columns (60) corresponding to each other are a group. The two groups of support columns (60) are respectively connected to the sliding frame (61) by sliding forward and backward. The two sliding frames (61) are respectively fixed with racks (62) along the front and rear directions. A second tension spring (63) is respectively fixed between the two sliding frames (61) and the two groups of support columns (60). The sliding frame (61) has a tendency to move backward under the elastic tension of the second tension spring (63). The outer circumferential walls of the two support plates (48) are respectively coaxially fixed with incomplete gear rings. (64), the two incomplete gear rings (64) are intermittently meshed with the two racks (62) respectively, and the left and right parts of the sliding frame (61) are each hinged with a pendulum (65) in the front and rear directions, and the virtual hinge axis of the pendulum (65) is arranged horizontally in the left and right directions. The front ends of the two collecting troughs (57) are each fixed with a transmission arm (66). When the sliding frame (61) moves forward and backward, it can drive the pendulum (65) to swing forward and backward. When the pendulum (65) swings backward, it can knock on the transmission arm (66). When the pendulum (65) is manually pushed upward, it can stay away from the transmission arm (66) so as not to interfere with the forward and backward movement of the collecting trough (57).

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