A hydraulic sand and gravel screening device and screening method thereof

Abstract

The present invention relates to the field of water conservancy engineering technology, specifically to a water conservancy sand and gravel screening device and a screening method thereof, including a screening box, wherein a screening assembly for screening sand and gravel raw materials is arranged in the screening box, and a plurality of discharge ports are opened on one side of the screening box, and the positions of the plurality of discharge ports match the positions of the discharge ports of the screening assembly. This device solves the blockage problem that may occur during the sand and gravel screening process through the design of the dredging assembly. When the first transmission belt rotates, the first connecting shaft connected to the first transmission belt will slide along the first limiting groove and drive the rotating drum to move. During the movement of the rotating drum, the dredging rod will continuously move the sand and gravel on the screening plate, and remove the sand and gravel stuck on the sieve hole, thereby avoiding blockage during the screening process. At the same time, when the rotating drum on the discharge plate rotates, it will also drive the discharge brush to rotate, clean the discharge plate, and sweep the remaining sand and gravel off and discharge it through the discharge port.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, in particular to a water conservancy sand and gravel screening device and a screening method thereof. Background Art

[0002] Water conservancy projects refer to various projects built to control, regulate and utilize natural surface water and groundwater to achieve the purpose of eliminating harm and promoting benefits. In water conservancy projects, it is usually necessary to build some buildings, such as dams, reservoirs, sluices, etc. During the construction process, in order to ensure and improve the construction quality, it is necessary to refine and screen the sand and gravel raw materials;

[0003] The commonly used screening devices at present have a relatively simple structure and are usually only equipped with one screen, with poor screening accuracy. When screening sand and gravel, the sand and gravel are easily stuck in the screen holes and cannot fall, causing the screen holes to be blocked, which greatly affects the screening efficiency.

[0004] Or, as provided in the publication number "CN215783714U", a crushed stone screening device for water conservancy projects is provided, in which the output shaft is driven to rotate by a motor, and the output shaft drives the output transmission wheel to rotate, and the output transmission wheel drives two filter plates to move up and down reciprocatingly through multiple transmission wheels and a rotating shaft, thereby realizing the screening of crushed stones, improving the utilization rate of crushed stones, and reducing the influence of different sizes of crushed stones on subsequent backfill utilization;

[0005] However, when the device is in use, when sand and gravel pass through the screen, due to the vibration of the screen, the sand and gravel on the screen will collide and squeeze each other, which may easily cause some sand and gravel to get stuck in the screen holes, causing the screen to be blocked. When blockage occurs, it needs to be handled manually, which seriously reduces the screening efficiency. At the same time, it also brings a heavy workload to the staff.

[0006] Therefore, those skilled in the art provide a hydraulic sand and gravel screening device and a screening method thereof to solve the problems raised in the above background technology. Summary of the invention

[0007] The object of the present invention is to provide a hydraulic sand and gravel screening device and a screening method thereof to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A hydraulic sand and gravel screening device comprises a screening box, wherein a screening assembly for screening sand and gravel raw materials is arranged in the screening box, a plurality of discharge ports are provided on one side of the screening box, and the positions of the plurality of discharge ports match the positions of the discharge ports of the screening assembly, a feeding box and a feeding assembly are also arranged on the side of the screening box away from the discharge ports, and the feeding box is connected with the feeding assembly, the feeding assembly comprises a feeding cylinder, a feeding pipe is arranged on the side wall of the feeding cylinder close to the top, the feeding cylinder is connected with the screening box through the feeding pipe, and a synchronization assembly is also arranged in the inner wall of the screening box;

[0010] The screening component includes two screening plates and a discharge plate, and the discharge plate is arranged below the two screening plates. Screen holes are provided on the two screening plates, and the diameter of the screen holes on the upper screening plate is larger than the diameter of the screen holes on the lower screening plate. The two screening plates and the discharge plate are also provided with dredging components.

[0011] Preferably: a conveying auger is arranged inside the feeding barrel, and the two ends of the conveying auger are rotatably connected to the top and bottom of the inner wall of the feeding barrel respectively, a driving motor is installed on the top of the feeding barrel, and the output end of the driving motor is fixed to the top of the conveying auger through a coupling, a feeding port for discharging materials is opened on the side wall of the feeding barrel near the top, and the feeding pipe is installed on the feeding port;

[0012] The bottom of the inner wall of the feeding box is arranged as an inclined surface, and the feeding box is communicated with the feeding tube, and the top of the feeding box is arranged with a cover plate for reducing dust emission.

[0013] Preferably, the dredging assembly comprises a plurality of rotating drums, which are respectively arranged above adjacent screening plates and discharge plates, a plurality of first limiting grooves are opened on the inner wall of one side of the screening box, and the plurality of first limiting grooves are respectively located above one side of adjacent screening plates and discharge plates, and the plurality of rotating drums are respectively slidably connected to adjacent first limiting grooves;

[0014] The rotating drum located on the two screening plates is equipped with a plurality of evenly distributed dredging rods, and the rotating drum located on the discharging plate is equipped with a plurality of evenly distributed discharging brushes.

[0015] Preferably: the synchronization component is arranged in the inner walls on both sides of the screening box, the synchronization component includes a plurality of drive mechanisms, the plurality of drive mechanisms are respectively arranged in adjacent first limiting grooves, the drive mechanism includes two first transmission wheels, a first transmission belt is arranged between the two first transmission wheels, the two first transmission wheels are connected by the first transmission belt, a servo motor is also installed in the inner wall of the screening box, and the output end of the servo motor is fixed to one of the first transmission wheels through a coupling;

[0016] The synchronization component also includes multiple groups of auxiliary movement mechanisms, which are respectively arranged in the inner wall of the screening box away from the first limit groove. Each group of the driving mechanisms includes a guide rail, and a synchronization slider is slidably connected to the guide rail. The guide rail is also equipped with multiple guide wheels for assisting the sliding of the synchronization slider.

[0017] Preferably, a guide groove for sliding of the rotating drum is provided on a side of the synchronous sliding block close to the rotating drum.

[0018] Preferably: both sides of each of the rotating drums are rotatably connected with a first connecting shaft, the first connecting shaft close to the first limiting groove is slidably connected to the adjacent first limiting groove, and the ends of the plurality of first connecting shafts away from the rotating drum are fixed to the outer surface of the adjacent first transmission belt;

[0019] The first connecting shaft on the other side of the rotating drum is slidably connected to the guide groove on the adjacent synchronous sliding block.

[0020] Preferably, the driving mechanism is further provided with a second transmission wheel, the second transmission wheel is provided on one of the first transmission wheels, and the second transmission wheel is provided on a side of the first transmission wheel away from the first limiting groove, a second transmission belt is provided between two adjacent second transmission wheels, and the plurality of second transmission wheels are connected by the second transmission belt;

[0021] Each of the second transmission wheels is hinged with a connecting rod on one side away from the first transmission wheel, and the connecting rod is arranged at an eccentric position of the second transmission wheel. The other end of each of the connecting rods is hinged with a synchronous shaft, and the sides of the multiple synchronous shafts away from the connecting rods are respectively fixed to the side walls of the adjacent screening plate and the discharge plate.

[0022] Preferably: a plurality of second limiting grooves having the same position as the first limiting grooves are formed on the inner wall of the screening box on a side away from the first limiting groove, each of the second limiting grooves is provided with limiting teeth, a second connecting shaft is installed on a side of each rotating drum away from the first connecting shaft, a plurality of second connecting shafts are installed on a side away from the rotating drum with synchronous gears, and the plurality of synchronous gears are respectively meshed with the limiting teeth in adjacent second limiting grooves.

[0023] Preferably, tension springs are installed on one side of the two screening plates and one discharge plate away from the discharge port, and the other ends of the plurality of tension springs are fixed to the inner wall of the screening box.

[0024] The present invention also provides a hydraulic sand and gravel screening method, which comprises the following steps:

[0025] S1. First, the raw materials are added through the feeding box, and the driving motor is started, so that the driving motor drives the conveying auger to rotate, and the raw materials in the feeding box are transported upward through the feeding pipe to the screening box, ready for screening;

[0026] S2, start the servo motor in the screening box, so that the servo motor drives one of the first transmission wheels to rotate, and the two first transmission wheels in one group rotate synchronously through the first transmission belt, and the first transmission wheels of another group rotate synchronously under the drive of the second transmission wheel and the second transmission belt, thereby rotating the three groups of synchronous connection mechanisms;

[0027] S2a, when the second transmission wheel rotates, the second transmission wheel pulls the connecting rod to move at the same time, and the connecting rod pulls the two screening plates and the discharge plate to move forward and backward through the synchronous shaft, and the sand and gravel are screened by the movement of the screening plates and the discharge plate;

[0028] S3. When the first transmission belt rotates, the first connecting shaft is driven by the first transmission belt to move synchronously along the first transmission belt, and the first connecting shaft slides along the first limiting groove while driving the rotating drum to slide;

[0029] S3a, the first connecting shaft located in the guide groove drives the synchronous sliding block to slide synchronously in the guide rail;

[0030] S3b. During the movement of the drum, the synchronous gear at the other end of the drum drives the drum and the dredging rod to rotate under the action of the limiting teeth. The sand and gravel on the screening plate are continuously moved by the rotation of the dredging rod, and the sand and gravel stuck in the sieve holes of the screening plate are pushed out. When the drum on the discharge plate rotates, the discharge brush is also driven to rotate, so that the discharge brush cleans the discharge plate, sweeps off the sand and gravel left on the discharge plate and discharges it through the discharge port.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In the present invention, the three sets of driving mechanisms in the screening box realize the synchronous movement of the three sets of screening plates and the discharge plates through the cooperation of the servo motor, the first transmission wheel, the second transmission wheel and the transmission belt. This design not only makes the screening process more stable, but also effectively screens and grades the sand and gravel through the movement of the screening plates and the discharge plates. At the same time, the setting of the tension spring further increases the movement range of the screening plates and the discharge plates, thereby improving the screening efficiency and stability.

[0033] 2. The present invention solves the problem of blockage that may occur in the sand and gravel screening process through the design of the dredging component. When the first transmission belt rotates, the first connecting shaft connected to the first transmission belt will slide along the first limiting groove and drive the rotating drum to move. During the movement of the rotating drum, the dredging rod will continuously move the sand and gravel on the screening plate, and remove the sand and gravel stuck in the sieve holes, thereby avoiding blockage in the screening process. At the same time, when the rotating drum on the discharge plate rotates, it will also drive the discharge brush to rotate, clean the discharge plate, and sweep the sand and gravel remaining on the discharge plate and discharge it through the discharge port.

[0034] 3. In the present invention, when the first connecting shaft slides upward along the first limiting groove, the rotating drum will move upward at the same time, so that the dredging rod and the discharge brush are away from the surface of the screening plate and the discharge plate. This design avoids the dredging rod and the discharge brush from causing obstruction when the sand and gravel are discharged, thereby ensuring the smooth progress of the screening process. At the same time, through the set guide rails and synchronous sliders, when the rotating drum moves, the synchronous slider is driven by the rotating drum and slides synchronously in the guide slider, making the movement of the rotating drum more stable.

[0035] 4. The present invention realizes the automatic transportation of sand and gravel raw materials through the cooperation of the driving motor and the conveying auger. Workers only need to put the sand and gravel raw materials into the feeding box, and the conveying auger can continuously transport the raw materials upward to the screening box. This process not only saves manpower, but also greatly improves the screening efficiency. At the same time, the bottom of the inner wall of the feeding box is set as an inclined surface, so that the sand and gravel can slide into the feeding tube more smoothly, further ensuring the continuity of transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the first viewing angle of the present invention;

[0037] Figure 2 This is a schematic diagram of the internal structure of the screening box in the present invention;

[0038] Figure 3 It is a partial structural schematic diagram of the dredging component in the present invention;

[0039] Figure 4 It is a partial structural schematic diagram of the screening box in the present invention;

[0040] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle;

[0041] Figure 6 It is a partial structural schematic diagram of the dredging component and the synchronization component in the present invention;

[0042] Figure 7 It is a partial structural schematic diagram of the synchronization component in the present invention;

[0043] Figure 8 It is a schematic diagram of part of the structure in the screening box of the present invention;

[0044] Fig. 9 It is a structural schematic diagram of the dredging component in the present invention;

[0045] Fig.10 It is a front cross-sectional view of the material feeding assembly in the present invention;

[0046] Fig.11 It is a front cross-sectional view of the feeding box in the present invention.

[0047] In the figure: 1. screening box; 11. discharge port; 12. first limiting groove; 13. second limiting groove; 14. limiting teeth; 15. screening plate; 16. discharge plate; 17. tension spring; 2. feeding box; 21. cover plate; 3. feeding assembly; 31. feeding cylinder; 32. conveying auger; 33. driving motor; 34. feeding pipe; 4. dredging assembly; 41. rotating cylinder; 42. first connecting shaft; 43. dredging rod; 44. second connecting shaft; 45. synchronous gear; 46. discharge brush; 51. first transmission wheel; 52. first transmission belt; 53. second transmission wheel; 54. second transmission belt; 55. guide rail; 56. synchronous slider; 57. guide groove; 58. connecting rod; 59. synchronous shaft. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] For example, see Figure 1-11 A hydraulic sand and gravel screening device comprises a screening box 1, wherein the screening box 1 is provided with a screening component for screening sand and gravel raw materials, a plurality of discharge ports 11 are provided on one side of the screening box 1, and the positions of the plurality of discharge ports 11 match the positions of the discharge ports of the screening component, a feeding box 2 and a feeding component 3 are further provided on the side of the screening box 1 away from the discharge port 11, and the feeding box 2 is connected with the feeding component 3, and the feeding component 3 comprises a feeding cylinder 31, and a feeding pipe 34 is provided on the side wall of the feeding cylinder 31 near the top, and the feeding cylinder 31 is connected with the screening box 1 through the feeding pipe 34, and the screening A synchronization component is also provided in the inner wall of the box 1. The screening component includes two screening plates 15 and a discharge plate 16. The discharge plate 16 is provided below the two screening plates 15. Screen holes are provided on the two screening plates 15. The diameter of the screen holes on the upper screening plate 15 is larger than the diameter of the screen holes on the lower screening plate 15. A dredging component 4 is also provided on the two screening plates 15 and the discharge plate 16. Tension springs 17 are also installed on the side of the two screening plates 15 and the discharge plate 16 away from the discharge port 11. The other ends of the plurality of tension springs 17 are fixed to the inner wall of the screening box 1.

[0051] When the device is needed, firstly, sand and gravel raw materials are put into the feeding box 2, and the feeding assembly 3 is started, and the sand and gravel raw materials are transported upward by the feeding assembly 3, and then transported to the screening box 1 through the feeding pipe 34;

[0052] After the sand and gravel raw materials enter the screening box 1, they first fall on the upper screening plate 15, and are preliminarily screened by the screening plate 15. Large particles of sand and gravel are discharged from the discharge port 11 through the discharge port on the screening plate 15, and small particles of sand and gravel continue to fall downward through the sieve holes on the screening plate 15, and fall on the lower screening plate 15 for further screening. The screened sand and gravel are discharged through the discharge port 11, and the sand and gravel that pass through the sieve holes on the lower screening plate 15 fall on the discharge plate 16 and are discharged through the discharge port 11 connected to the discharge plate 16.

[0053] By setting up multiple layers of screens, the screening accuracy and purity are greatly increased during use. By setting up the feeding box 2 and the feeding assembly 3, it is convenient for workers to add materials in time during use. By setting up the dredging assembly 4 on the screening plate 15 and the discharge plate 16, when screening sand and gravel, the dredging assembly 4 can be used to remove the sand and gravel stuck in the sieve holes to avoid the sand and gravel clogging the sieve holes and affecting the screening efficiency. At the same time, it can further promote the discharge of sand and gravel from the discharge port 11 to avoid the accumulation of sand and gravel on the sieve.

[0054] For example 2, please refer to Figure 1 , Fig.10 and Fig.11 A conveying auger 32 is arranged inside the feeding cylinder 31, and the two ends of the conveying auger 32 are rotatably connected to the top and bottom of the inner wall of the feeding cylinder 31 respectively, a driving motor 33 is installed on the top of the feeding cylinder 31, and the output end of the driving motor 33 is fixed to the top of the conveying auger 32 through a coupling, a feeding port for discharging materials is opened on the side wall of the feeding cylinder 31 near the top, and a feeding pipe 34 is installed on the feeding port, the bottom of the inner wall of the feeding box 2 is set as an inclined surface, and the feeding box 2 is connected to the feeding cylinder 31, and a cover plate 21 for reducing dust emission is arranged on the top of the feeding box 2;

[0055] When feeding, first start the driving motor 33, so that the driving motor 33 drives the conveying auger 32 to rotate in the feeding barrel 31, remove the cover plate 21 from the feeding box 2, and put the sand and gravel materials to be screened into the feeding box 2. By setting the bottom of the inner wall of the feeding box 2 as an inclined surface, it is convenient for the sand and gravel to slide into the feeding barrel 31. The sand and gravel raw materials enter the feeding barrel 31 and are continuously transported upward by the conveying auger 32, and are discharged into the feeding pipe 34 through the feeding port, and finally discharged into the screening box 1 through the feeding pipe 34 for screening;

[0056] By setting up the feeding box 2 and the conveying auger 32, when in use, the sand and gravel raw materials in the feeding box 2 can be conveyed to the screening box 1 through the conveying auger 32, with high conveying efficiency and uniform and stable speed, which greatly reduces the workload and labor intensity of workers.

[0057] For example 3, please refer to Figure 1-9The dredging component 4 includes a plurality of rotating drums 41, which are respectively arranged above the adjacent screening plates 15 and the discharge plates 16. A plurality of first limiting grooves 12 are provided on the inner wall of one side of the screening box 1, and the plurality of first limiting grooves 12 are respectively located above one side of the adjacent screening plates 15 and the discharge plates 16. The plurality of rotating drums 41 are respectively slidably connected to the adjacent first limiting grooves 12. A plurality of evenly distributed dredging rods 43 are installed on the rotating drums 41 located on the two screening plates 15, and a plurality of groups of evenly distributed discharge brushes 46 are installed on the rotating drums 41 located on the discharge plates 16. The synchronous component is arranged in the inner walls on both sides of the screening box 1. The synchronous component includes a plurality of driving mechanisms, which are respectively arranged in the adjacent first limiting grooves 12. The driving mechanism includes two A first transmission wheel 51 is provided between the two first transmission wheels 51, and the two first transmission wheels 51 are connected through the first transmission belt 52. A servo motor is also installed in the inner wall of the screening box 1, and the output end of the servo motor is fixed to one of the first transmission wheels 51 through a coupling. The synchronization component also includes a plurality of groups of auxiliary movement mechanisms, and the plurality of groups of auxiliary movement mechanisms are respectively arranged in the inner wall of the screening box 1 away from the first limiting groove 12. Each group of driving mechanisms includes a guide rail 55, and a synchronous slider 56 is slidably connected to the guide rail 55. A plurality of guide wheels for assisting the sliding of the synchronous slider 56 are also installed in the guide rail 55. A guide groove 57 for sliding the rotating drum 41 is provided on the side of the synchronous slider 56 close to the rotating drum 41. Each The first connecting shaft 42 is rotatably connected to one side of the rotating drum 41 close to the first transmission belt 52. The plurality of first connecting shafts 42 are respectively slidably connected to the adjacent first limiting grooves 12, and the ends of the plurality of first connecting shafts 42 away from the rotating drum 41 are fixed to the outer surface of the adjacent first transmission belt 52. The first connecting shaft 42 on the other side of the rotating drum 41 is slidably connected to the guide groove 57 on the adjacent synchronous slider 56. A second transmission wheel 53 is also installed on the driving mechanism. The second transmission wheel 53 is installed on one of the first transmission wheels 51, and the second transmission wheel 53 is installed on the side of the first transmission wheel 51 away from the first limiting groove 12. A second transmission belt 54 is arranged between two adjacent second transmission wheels 53. The plurality of second transmission wheels 53 are connected to the first transmission belt 54 through the second transmission belt 54. The second transmission wheel 53 is connected to the first transmission wheel 51 by a driving belt 54. A connecting rod 58 is hinged on the side of each second transmission wheel 53 away from the first transmission wheel 51, and the connecting rod 58 is arranged at the eccentric position of the second transmission wheel 53. A synchronous shaft 59 is hinged on the other end of each connecting rod 58. The side of multiple synchronous shafts 59 away from the connecting rod 58 is respectively fixed to the side walls of the adjacent screening plate 15 and the discharge plate 16. A plurality of second limiting grooves 13 with the same position as the first limiting groove 12 are also opened on the side of the inner wall of the screening box 1 away from the first limiting groove 12. A limiting tooth 14 is arranged on each second limiting groove 13. A second connecting shaft 44 is installed on the side of each rotating drum 41 away from the first connecting shaft 42. A synchronous gear 45 is installed on the side of multiple second connecting shafts 44 away from the rotating drum 41.The plurality of synchronous gears 45 are respectively meshed with the limiting teeth 14 in the adjacent second limiting grooves 13;

[0058] When the sand and gravel raw materials enter the screening box 1 through the feeding pipe 34, the servo motor in the screening box 1 is first started, so that the servo motor drives one of the first transmission wheels 51 to rotate, and the two first transmission wheels 51 in one group rotate synchronously through the first transmission belt 52, and the first transmission wheels 51 in another group rotate synchronously under the drive of the second transmission wheel 53 and the second transmission belt 54, thereby rotating the three groups of synchronous connection mechanisms;

[0059] When the second transmission wheel 53 rotates, the second transmission wheel 53 pulls the connecting rod 58 to move at the same time, and the connecting rod 58 pulls the two screening plates 15 and the discharge plate 16 to move forward and backward through the synchronization shaft 59, and the sand and gravel are screened by the movement of the screening plates 15 and the discharge plate 16;

[0060] At the same time, when the first transmission belt 52 rotates, the first connecting shaft 42 connected to the first transmission belt 52 moves synchronously along the first transmission belt 52 under the drive of the first transmission belt 52, and the first connecting shaft 42 slides along the first limiting groove 12 while driving the rotating drum 41 to slide. At the same time, the first connecting shaft 42 located in the guide groove 57 drives the synchronous slider 56 to slide synchronously in the guide rail 55, so that the movement of the rotating drum 41 is more stable;

[0061] In the initial state, the drum 41 is located at a side of the screening box 1 away from the discharge port 11. When the first connecting shaft 42 drives the drum 41 to move, the drum 41 gradually moves toward the direction close to the discharge port 11. During the movement of the drum 41, the synchronous gear 45 at the other end of the drum 41 drives the drum 41 to rotate under the action of the limiting teeth 14 in the second limiting groove 13. The drum 41 drives the dredging rod 43 to rotate. The sand and gravel on the screening plate 15 are continuously moved by the rotation of the dredging rod 43, and the sand and gravel stuck on the sieve holes of the screening plate 15 are removed. When the drum 41 on the discharge plate 16 rotates, it also drives the discharge brush 46 to rotate, so that the discharge brush 46 cleans the discharge plate 16, sweeps the sand and gravel left on the discharge plate 16 and discharges it through the discharge port 11.

[0062] When the first connecting shaft 42 slides upward along the first limiting groove 12, the rotating drum 41 moves upward at the same time, so that the dredging rod 43 and the discharge brush 46 are away from the surfaces of the screening plate 15 and the discharge plate 16, so as to prevent the dredging rod 43 and the discharge brush 46 from blocking the discharge of sand and gravel. Through the set guide groove 57, when the rotating drum 41 moves upward, the first connecting shaft 42 in the guide groove 57 slides upward along the guide groove 57, and is clamped in the horizontal groove above the guide groove 57 under the action of the upward movement of the rotating drum 41, thereby further ensuring the stability of the rotating drum 41 when it moves.

[0063] Example 4, please refer to Figure 1-11, a hydraulic sand and gravel screening method, the method comprising the following steps:

[0064] S1, firstly, the raw materials are added through the feeding box 2, and the driving motor 33 is started, so that the driving motor 33 drives the conveying auger 32 to rotate, and the raw materials in the feeding box 2 are transported upward through the feeding pipe 34 to the screening box 1, ready for screening;

[0065] S2, start the servo motor in the screening box 1, so that the servo motor drives one of the first transmission wheels 51 to rotate, and the two first transmission wheels 51 in one group rotate synchronously through the first transmission belt 52, and the first transmission wheels 51 in another group rotate synchronously under the drive of the second transmission wheel 53 and the second transmission belt 54, thereby rotating the three groups of synchronous connection mechanisms;

[0066] S2a, when the second transmission wheel 53 rotates, the second transmission wheel 53 pulls the connecting rod 58 to move at the same time, and the connecting rod 58 pulls the two screening plates 15 and the discharge plate 16 to move forward and backward through the synchronous shaft 59, and the sand and gravel are screened by the movement of the screening plates 15 and the discharge plate 16;

[0067] S3. When the first transmission belt 52 rotates, the first connecting shaft 42 is driven by the first transmission belt 52 to move synchronously along the first transmission belt 52 , and the first connecting shaft 42 slides along the first limiting groove 12 while driving the rotating drum 41 to slide;

[0068] S3a, the first connecting shaft 42 located in the guide groove 57 drives the synchronous slider 56 to slide synchronously in the guide rail 55;

[0069] S3b. During the movement of the drum 41, the synchronous gear 45 at the other end of the drum 41 drives the drum 41 and the dredging rod 43 to rotate under the action of the limiting teeth 14. The dredging rod 43 rotates to continuously move the sand and gravel on the screening plate 15, and the sand and gravel stuck on the sieve holes of the screening plate 15 are moved out. When the drum 41 on the discharge plate 16 rotates, it also drives the discharge brush 46 to rotate, so that the discharge brush 46 cleans the discharge plate 16, sweeps the sand and gravel left on the discharge plate 16 off and discharges it through the discharge port 11.

[0070] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0071] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic sand and gravel screening device, comprising a screening box (1), characterized in that: The screening box (1) is provided with a screening component for screening sandstone raw materials, a plurality of discharge ports (11) are provided on one side of the screening box (1), and the positions of the plurality of discharge ports (11) match the positions of the discharge ports of the screening component, a feeding box (2) and a feeding component (3) are also provided on the side of the screening box (1) away from the discharge ports (11), and the feeding box (2) is connected to the feeding component (3), the feeding component (3) comprises a feeding cylinder (31), a feeding pipe (34) is provided on the side wall of the feeding cylinder (31) near the top, the feeding cylinder (31) is connected to the screening box (1) via the feeding pipe (34), and a synchronization component is also provided on the inner wall of the screening box (1); The screening assembly comprises two screening plates (15) and a discharge plate (16), wherein the discharge plate (16) is arranged below the two screening plates (15), and the two screening plates (15) are provided with screening holes, wherein the diameter of the screening holes on the upper screening plate (15) is larger than the diameter of the screening holes on the lower screening plate (15), and the two screening plates (15) and the discharge plate (16) are also provided with dredging assemblies (4); The dredging assembly (4) comprises a plurality of rotating drums (41), wherein the plurality of rotating drums (41) are respectively arranged above adjacent screening plates (15) and discharge plates (16); a plurality of first limiting grooves (12) are opened on the inner wall of one side of the screening box (1), and the plurality of first limiting grooves (12) are respectively located above one side of adjacent screening plates (15) and discharge plates (16); and the plurality of rotating drums (41) are respectively slidably connected to adjacent first limiting grooves (12); The rotating drum (41) located on the two screening plates (15) is installed with a plurality of evenly distributed dredging rods (43), and the rotating drum (41) located on the discharge plate (16) is installed with a plurality of evenly distributed discharge brushes (46); The synchronization component is arranged in the inner walls of both sides of the screening box (1), the synchronization component comprises a plurality of drive mechanisms, the plurality of drive mechanisms are respectively arranged in adjacent first limit grooves (12), the drive mechanism comprises two first transmission wheels (51), a first transmission belt (52) is arranged between the two first transmission wheels (51), the two first transmission wheels (51) are connected in transmission via the first transmission belt (52), a servo motor is also installed in the inner wall of the screening box (1), the output end of the servo motor is fixed to one of the first transmission wheels (51) via a coupling; The synchronization component further comprises a plurality of groups of auxiliary moving mechanisms, the plurality of groups of auxiliary moving mechanisms being respectively arranged in the inner wall of the screening box (1) away from the first limiting groove (12), each group of the auxiliary moving mechanisms comprising a guide rail (55), a synchronization slider (56) being slidably connected to the guide rail (55), and a plurality of guide wheels for assisting the sliding of the synchronization slider (56) are also installed in the guide rail (55); A guide groove (57) for the rotating drum (41) to slide is formed on a side of the synchronous slider (56) close to the rotating drum (41); Both sides of each rotating drum (41) are rotatably connected to a first connecting shaft (42), the first connecting shaft (42) close to the first limiting groove (12) is slidably connected to an adjacent first limiting groove (12), and ends of the plurality of first connecting shafts (42) away from the rotating drum (41) are fixed to the outer surface of an adjacent first transmission belt (52); The first connecting shaft (42) on the other side of the rotating drum (41) is slidably connected to a guide groove (57) on an adjacent synchronous sliding block (56); The driving mechanism is further provided with a second transmission wheel (53), the second transmission wheel (53) being installed on one of the first transmission wheels (51), and the second transmission wheel (53) being installed on a side of the first transmission wheel (51) away from the first limiting groove (12), a second transmission belt (54) being provided between two adjacent second transmission wheels (53), and the plurality of second transmission wheels (53) being connected in transmission via the second transmission belt (54); A connecting rod (58) is hingedly connected to one side of each of the second transmission wheels (53) away from the first transmission wheel (51), and the connecting rod (58) is arranged at an eccentric position of the second transmission wheel (53). A synchronous shaft (59) is hingedly connected to the other end of each of the connecting rods (58). The sides of the multiple synchronous shafts (59) away from the connecting rods (58) are respectively fixed to the side walls of the adjacent screening plate (15) and the discharge plate (16); A plurality of second limiting grooves (13) having the same position as the first limiting groove (12) are further provided on the inner wall of the screening box (1) at a side away from the first limiting groove (12); each of the second limiting grooves (13) is provided with limiting teeth (14); a second connecting shaft (44) is installed on a side away from the first connecting shaft (42) of each rotating drum (41); a plurality of second connecting shafts (44) are installed on a side away from the rotating drum (41) with synchronous gears (45); and the plurality of synchronous gears (45) are respectively meshed with the limiting teeth (14) in adjacent second limiting grooves (13).

2. A hydraulic sand and gravel screening device according to claim 1, characterized in that: A conveying auger (32) is arranged inside the feeding barrel (31), and the two ends of the conveying auger (32) are rotatably connected to the top and bottom of the inner wall of the feeding barrel (31), respectively; a driving motor (33) is installed on the top of the feeding barrel (31), and the output end of the driving motor (33) is fixed to the top of the conveying auger (32) through a coupling; a feeding port for discharging materials is opened on the side wall of the feeding barrel (31) near the top, and the feeding pipe (34) is installed on the feeding port; The bottom of the inner wall of the feeding box (2) is arranged as an inclined surface, and the feeding box (2) is connected to the feeding cylinder (31). The top of the feeding box (2) is provided with a cover plate (21) for reducing dust emission.

3. A hydraulic sand and gravel screening device according to claim 2, characterized in that: Tension springs (17) are also installed on the side of the two screening plates (15) and the one discharge plate (16) away from the discharge port (11), and the other ends of the plurality of tension springs (17) are fixed to the inner wall of the screening box (1).

4. A screening method according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: S1, firstly, raw materials are added through the feeding box (2), and the driving motor (33) is started, so that the driving motor (33) drives the conveying auger (32) to rotate, and the raw materials in the feeding box (2) are conveyed upward through the feeding pipe (34) to the screening box (1) to prepare for screening; S2, starting the servo motor in the screening box (1), so that the servo motor drives one of the first transmission wheels (51) to rotate, and the two first transmission wheels (51) in one group rotate synchronously through the first transmission belt (52), and the first transmission wheels (51) in another group rotate synchronously under the drive of the second transmission wheel (53) and the second transmission belt (54), thereby causing the three groups of synchronous connection mechanisms to rotate; S2a, when the second transmission wheel (53) rotates, the second transmission wheel (53) simultaneously pulls the connecting rod (58) to move, and the connecting rod (58) pulls the two screening plates (15) and the discharge plate (16) to move forward and backward through the synchronization shaft (59), and the sand and gravel are screened by the movement of the screening plates (15) and the discharge plate (16); S3. When the first transmission belt (52) rotates, the first connecting shaft (42) is driven by the first transmission belt (52) to move synchronously along the first transmission belt (52), and the first connecting shaft (42) slides along the first limiting groove (12) and drives the rotating drum (41) to slide at the same time; S3a, the first connecting shaft (42) located in the guide groove (57) drives the synchronous sliding block (56) to slide synchronously in the guide rail (55); S3b. During the movement of the rotating drum (41), the synchronous gear (45) at the other end of the rotating drum (41) drives the rotating drum (41) and the dredging rod (43) to rotate under the action of the limiting teeth (14). The dredging rod (43) rotates to continuously move the sand and gravel on the screening plate (15), and the sand and gravel stuck on the sieve holes of the screening plate (15) are removed. When the rotating drum (41) on the discharge plate (16) rotates, the discharge brush (46) is driven to rotate at the same time, so that the discharge brush (46) cleans the discharge plate (16), sweeps the sand and gravel left on the discharge plate (16) off, and discharges the sand and gravel through the discharge port (11).

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