A sediment screening device for water conservancy projects

Abstract

The present application relates to a sediment screening device for water conservancy projects, belonging to the technical field of sediment screening, and comprising: a screening box; a first screen, located inside the screening box and hinged with a first connecting column, the first connecting column being connected to the side wall of the screening box; a second screen, located inside the screening box and below the first screen, the second screen being hinged with a second connecting column, the second connecting column being connected to the side wall of the screening box, and the screening accuracy of the second screen being higher than that of the first screen; a first vibration assembly, arranged on the first screen; a second vibration assembly, arranged on the second screen and having the same structure as the first vibration assembly; wherein, the first vibration assembly is used to vibrate and screen the sediment on the first screen in a manner of large amplitude and low vibration frequency, and the second vibration assembly is used to vibrate and screen the sediment on the second screen in a manner of low amplitude and high vibration frequency. The present application has the effect of improving the screening effect of sediments with different particle sizes.

Description

Technical Field

[0001] This application relates to the technical field of sediment screening, and particularly to a sediment screening device for water conservancy projects. Background Art

[0002] In water conservancy projects, in order to meet the requirements of different projects for the particle size of sediment, it is necessary to use a screening device to screen the sediment so that the sediment can be classified and used according to different particle sizes.

[0003] Currently, a vibrating screening device is generally used to screen sediment. The vibrating screening device includes more than two sieve plates of different specifications. The more than two sieve plates of different specifications perform multi-stage screening on the sediment to achieve particle size classification of the sediment. However, during the screening process, all the sieve plates are usually driven by the same vibration source to vibrate with the same amplitude and the same vibration frequency. The magnitude of the amplitude and the vibration frequency will directly affect the screening effect of the sediment on the sieve plate. For sediment with a larger particle size, large amplitude and low vibration frequency are required for screening so that the sediment can be fully dispersed and pass through the sieve plate. For sediment with a smaller particle size, small amplitude and high vibration frequency are required for screening to accelerate the screening speed of the sediment and prevent the sediment from prematurely detaching from the sieve plate.

[0004] Based on the above analysis, although the existing vibrating screening device realizes multi-stage screening of sediment, it has the defect of poor screening effect, which is not conducive to the precise classification of sediment. Summary of the Invention

[0005] In order to improve the screening effect of sediment with different particle sizes so that the sediment can be precisely classified, this application provides a sediment screening device for water conservancy projects.

[0006] A sediment screening device for water conservancy projects provided by this application adopts the following technical solutions:

[0007] A sediment screening device for water conservancy projects includes:

[0008] A screening box;

[0009] A first screen, located inside the screening box, and hinged with a first connecting column, and the first connecting column is connected to the side wall of the screening box;

[0010] A second screen, located inside the screening box and below the first screen. The second screen is hinged with a second connecting column, and the second connecting column is connected to the side wall of the screening box. The screening accuracy of the second screen is higher than that of the first screen;

[0011] A first vibration assembly, arranged on the first screen;

[0012] A second vibration assembly, arranged on the second screen and having the same structure as the first vibration assembly;

[0013] Among them,

[0014] The first vibration assembly includes:

[0015] A vibration box, connected to one side of the first screen, and the side far from the first screen is open;

[0016] A vibration rotating shaft, rotatably connected inside the vibration box;

[0017] A vibration impeller, sleeved on the vibration rotating shaft;

[0018] A vibration turntable, hermetically covered on the open side of the vibration box and connected to the vibration rotating shaft;

[0019] A vibration rod, one end rotatably connected to the vibration turntable and the other end hinged to the first connecting column;

[0020] A vibration water inlet pipe and a vibration water outlet pipe are communicated with the vibration box. The communication position of the vibration water inlet pipe with the vibration box is directly opposite to the blades of the vibration impeller. The vibration water inlet pipe is used to introduce pressurized water flow into the vibration box, and the vibration water outlet pipe is used to discharge the water in the vibration box. An adjusting valve is arranged on the vibration water inlet pipe;

[0021] The rotation connection position of the vibration rod of the first vibration assembly with the vibration turntable of the first vibration assembly is arranged close to the edge position of the vibration turntable; the rotation connection position of the vibration rod of the second vibration assembly with the vibration turntable of the second vibration assembly is arranged close to the center position of the vibration turntable.

[0022] By adopting the above technical solution, the vibration water inlet pipe supplies pressurized water flow into the vibration box, and can make the pressurized water flow impact on the blades of the vibration impeller to drive the vibration impeller to rotate. The vibration impeller drives the vibration rod to swing through the vibration turntable. The swinging vibration rod drives the vibration box to vibrate through the vibration turntable, and the vibration box drives the first screen to vibrate; the vibration rod of the first vibration assembly can drive the first screen to vibrate, and because the rotation connection position of the vibration rod with the vibration turntable is arranged close to the edge position of the vibration turntable, the vibration amplitude of the first screen is relatively large, so that the first screen can vibrate the sediment with a large amplitude; the vibration rod of the second vibration assembly can drive the second screen to vibrate, and because the rotation connection position of the vibration rod with the vibration turntable is arranged close to the center position of the vibration turntable, the vibration amplitude of the second screen is relatively small, so that the second screen can vibrate the sediment with a small amplitude.

[0023] By adjusting the valve to control the water flow rate in the vibrating water inlet pipe, the driving speed of the vibrating impeller by the water flow can be regulated, so that the rotation speed of the vibrating impeller can be adjusted adaptively; adjust the valve of the first vibrating component to slow down the water flow rate in the vibrating water inlet pipe, so that the vibrating impeller of the first vibrating component rotates slowly, so that the first screen can vibrate the sediment at a low vibration frequency; adjust the valve of the second vibrating component to increase the water flow rate in the vibrating water inlet pipe, so that the vibrating impeller of the second vibrating component rotates quickly, so that the second screen can vibrate the sediment at a high vibration frequency.

[0024] By controlling the rotational connection position of the vibrating rod and the vibrating turntable and the water flow rate in the vibrating water inlet pipe, the first screen can screen the sediment with a large amplitude and a low vibration frequency, and the second screen can screen the sediment with a small amplitude and a high vibration frequency, improving the screening effect of sediment with different particle sizes and enabling the sediment to be accurately classified.

[0025] Optionally, the first connecting column and the second connecting column are respectively arranged close to two opposite side walls of the screening box and are both rotationally connected to the screening box. One end of the first connecting column is provided with a first swinging component, and one end of the second connecting column is provided with a second swinging component. The first swinging component and the second swinging component have the same structure;

[0026] The first swinging component includes a swinging part, and the swinging part includes a swinging box, a swinging shaft and a swinging impeller;

[0027] The swinging box is connected to the screening box. The swinging shaft rotates through the swinging box and is connected to the end of the first connecting column. The swinging impeller is located in the swinging box and is sleeved on the swinging shaft;

[0028] A forward water inlet pipe, a reverse water inlet pipe and a swinging water outlet pipe are communicated with the swinging box. The forward water inlet pipe and the reverse water inlet pipe are symmetrically arranged on both sides of the swinging shaft. The communication part of the forward water inlet pipe and the swinging box is opposite to the blades of the swinging impeller, and the communication part of the reverse water inlet pipe and the swinging box is opposite to the blades of the swinging impeller;

[0029] Both the forward water inlet pipe and the reverse water inlet pipe are used to introduce pressurized water flow into the swinging box. A first ball valve is arranged on the forward water inlet pipe, a second ball valve is arranged on the reverse water inlet pipe, and the swinging water outlet pipe is used to discharge the water in the swinging box;

[0030] When the first ball valve is opened and the second ball valve is closed, the forward water inlet pipe introduces pressurized water flow into the swinging box, so that the first screen can swing from a downward inclination to an upward inclination. When the first ball valve is closed and the second ball valve is opened, the reverse water inlet pipe introduces pressurized water flow into the swinging box, so that the first screen can swing from an upward inclination to a downward inclination.

[0031] By adopting the above technical solution, the first ball valve is opened and the second ball valve is closed, so that the pressurized water flow enters the swing box from the forward water inlet pipe. The pressurized water flow impacts on the blades of the swing impeller to drive the swing impeller to rotate forward. The swing impeller drives the first connecting column to rotate, so that the first screen swings upward around the rotation axis of the first connecting column; the second ball valve is opened and the first ball valve is closed, so that the pressurized water flow enters the swing box from the reverse water inlet pipe. The pressurized water flow impacts on the blades of the swing impeller to drive the swing impeller to rotate in reverse. The swing impeller drives the first connecting column to rotate, so that the first screen swings downward around the rotation axis of the first connecting column; thus, by regulating the opening and closing of the first ball valve and the second ball valve, the first screen can swing up and down reciprocally around the rotation axis of the first connecting column, prolonging the screening time of the sediment on the first screen and improving the screening effect of the sediment.

[0032] Optionally, the first swing assembly further includes a fixing part and a releasing part. The fixing part is respectively connected to the first connecting column and the screening box, and is used to fix the first connecting column relative to the screening box. The releasing part is connected to the screening box and is used to intermittently release the fixation of the fixing part on the first connecting column. After the fixation of the fixing part on the first connecting column is released, the first connecting column can rotate a fixed angle. After the first connecting column rotates the fixed angle, the fixing part fixes the first connecting column relative to the screening box again.

[0033] By adopting the above technical solution, since the releasing part can intermittently release the fixation of the fixing part on the first connecting column, and after the first connecting column is released from fixation and rotates a fixed angle, the fixing part can fix the first connecting column again, the first connecting column can perform intermittent rotation, so that the first screen can swing intermittently around the rotation axis of the first connecting column, and further, the time for the first screen to swing from upward inclination to downward inclination around the rotation axis of the first connecting column can be prolonged.

[0034] Optionally, the fixing part includes a fixing disk, a fixing slide rod and a fixing spring. The fixing disk is connected to the end of the first connecting column. A plurality of fixing grooves are formed in the circumferential direction on the side wall of the fixing disk. The fixing slide rod is slidably connected to the screening box. The fixing spring is arranged between the fixing slide rod and the screening box and is used to drive the end of the fixing slide rod to be inserted into any one of the fixing grooves.

[0035] By adopting the above technical scheme, the end of the fixed slide rod is inserted into the fixed groove, so that the fixed disk can be fixed relative to the screening box, so that the first connecting column can be fixed to the screening box by relying on the fixed slide rod; when an external force drives the end of the fixed slide rod to slide out of the fixed groove, the rotation state of the first connecting column can be quickly restored; when the first connecting column rotates, the external force driving the fixed slide rod is canceled, and under the elastic force of the fixed spring, the end of the fixed slide rod can abut against the side wall of the fixed disk until the next fixed groove rotates to the position of the fixed slide rod, and the fixed slide rod can be reinserted into the fixed groove under the elastic force of the fixed spring to re-fix the fixed disk and the screening box, so that the first connecting column is easy to fix and easy to automatically re-fix after releasing the fixation.

[0036] Optionally, the release unit includes:

[0037] A release box connected to the screening box;

[0038] A release shaft is rotatably arranged on the release box;

[0039] A release impeller is located in the release box and sleeved on the release shaft;

[0040] A first release gear is located outside the release box and connected to the release shaft, and the first release gear is an incomplete gear;

[0041] A second release gear is rotatably connected to the screening box, and the second release gear is intermittently meshed with the first release gear;

[0042] A release plate is connected to the second release gear, and a plurality of release blocks are evenly connected to the side wall of the release plate along the circumferential direction;

[0043] a release rod connected to the fixed slide rod;

[0044] The release box is connected with a release water inlet pipe and a release water outlet pipe, the connection point between the release water inlet pipe and the release box is directly opposite to the blades of the release impeller, the release water inlet pipe is used to introduce pressurized water into the release box, and the release water outlet pipe is used to discharge water in the release box;

[0045] The release block is used to push the release rod to move during the rotation of the release disk. When the release block pushes past the release rod, the release rod drives the end of the fixed slide rod to completely escape from the fixed groove.

[0046] By adopting the above technical solution, the pressurized water flow released in the water inlet pipe can impact on the blades of the release impeller. The release impeller drives the first release gear to rotate continuously. The first release gear intermittently drives the second release gear to rotate. The second release gear intermittently drives the release disc to rotate. The release disc intermittently drives all the release blocks to rotate. All the release blocks sequentially push the release rod to move. Since when the release block passes over the release rod, the release rod drives the end of the fixed slide rod to completely disengage from the fixed slot, the fixed slide rod can intermittently disengage from the fixed slot under the intermittent pushing of the release block, so that the fixed state of the fixed disc can be intermittently released.

[0047] Optionally, both the fixing part and the releasing part are located on the side of the first connecting column close to the swing box. A reversing part is commonly connected to the first ball valve and the second ball valve. The reversing part includes a first synchronous pulley, a second synchronous pulley, a first synchronous drive belt, a cross reversing frame and a reversing lever.

[0048] The first synchronous pulley is connected to the valve stem of the first ball valve. The second synchronous pulley is connected to the valve stem of the second ball valve. The first synchronous drive belt is wound around the first synchronous pulley and the second synchronous pulley. The opening and closing states of the first ball valve are opposite to those of the second ball valve.

[0049] The central part of the cross reversing frame is connected to the valve stem of the second ball valve. The reversing lever is connected to the release disc. The reversing lever is used to push the cross reversing frame to rotate during the rotation process following the release disc.

[0050] After the release block drives the end of the fixed slide rod to completely disengage from the fixed slot, the reversing lever just pushes the cross reversing frame to rotate 90°.

[0051] By adopting the above technical solution, during the intermittent rotation process, the release disc can not only make the release block push the release rod, but also drive the reversing lever to push the cross reversing frame after rotating one week. The cross reversing frame can drive the valve stem of the second ball valve to rotate 90° to realize the switching of the opening and closing states of the second ball valve. Under the transmission action of the first synchronous pulley, the second synchronous pulley and the first synchronous drive belt, the opening and closing states of the first ball valve can follow the switching. And since the opening and closing states of the first ball valve are opposite to those of the second ball valve, the rotation direction of the swing impeller can be switched, so that after the first connecting column rotates a fixed angle in a single direction, it can automatically switch the rotation direction, and the first screen can swing a fixed angle in a single direction around the rotation axis of the first connecting column and then automatically switch the swing direction.

[0052] Optionally, a first flushing assembly and a second flushing assembly are arranged in the screening box. The first flushing assembly is located between the first screen and the second screen and is arranged close to the side wall of the screening box opposite to the first connecting column. The second flushing assembly is located on the side of the second screen away from the first screen and is arranged close to the side wall of the screening box opposite to the second connecting column. The first flushing assembly and the second flushing assembly have the same structure;

[0053] The first flushing assembly includes a flushing water pipe and flushing nozzles. The flushing water pipe is connected to the side wall of the screening box. A plurality of flushing nozzles are provided and are all communicated with the flushing water pipe. The flushing nozzles face the first screen. One end of the flushing water pipe is connected with a flushing water inlet pipe, and the flushing water inlet pipe is used for introducing pressurized water flow into the flushing water pipe.

[0054] By adopting the above technical solution, the flushing water inlet pipe introduces the pressurized water flow into the flushing water pipe, and the pressurized water flow is sprayed from the flushing nozzles onto the first screen. The water flow sprayed from the flushing nozzles can flush the mud and sand on the first screen to remove the soil in the mud and sand. At the same time, the water flow can dredge the mesh holes of the first screen, so that the first screen is not easily blocked.

[0055] Optionally, the flushing water pipe is rotatably connected to the screening box and is also rotatably connected to the flushing water inlet pipe. One end of the flushing water pipe away from the flushing water inlet pipe is connected with a third synchronous pulley. One end of the first connecting column close to the third synchronous pulley is connected with a fourth synchronous pulley. A second synchronous drive belt is wound around the third synchronous pulley and the fourth synchronous pulley. When the first screen tilts upward, the water flow sprayed by the flushing nozzles impacts on the position of the first screen close to the first connecting column.

[0056] By adopting the above technical solution, through the third synchronous pulley, the fourth synchronous pulley and the second synchronous drive belt, when the first connecting column rotates, it can drive the flushing water pipe to rotate synchronously, so that the direction of the water flow sprayed by the flushing nozzles can be adjusted synchronously with the swing of the first screen around the rotation axis of the first connecting column, so that the water flow sprayed by the flushing nozzles can fully flush the first screen; since when the first screen tilts upward, the water flow sprayed by the flushing nozzles impacts on the position of the first screen close to the first connecting column, when the first screen tilts downward, the water flow sprayed by the flushing nozzles can impact on the position of the first screen away from the first connecting column. Therefore, in the process that the first screen gradually swings downward around the rotation axis of the first connecting column, the spraying position of the spraying water flow of the flushing nozzles on the first screen can gradually move away from the first connecting column, so that the spraying water flow of the flushing nozzles can hinder the discharge of the mud and sand on the first screen, thereby prolonging the screening time of the mud and sand on the first screen.

[0057] Optionally, a water tank is provided on one side of the screening box. The water tank is used for storing water and is connected to a first water pump and a second water pump. The first water pump is used to supply water to the first vibration assembly, the first swing assembly, and the first flushing assembly, and the second water pump is used to supply water to the second vibration assembly, the second swing assembly, and the second flushing assembly. Moreover, the water supply pipeline of the first water pump is the same as that of the second water pump;

[0058] The water outlet of the first water pump is respectively connected to the vibration water inlet pipe and the release water inlet pipe. The vibration water outlet pipe is connected to the flushing water inlet pipe. The release water outlet pipe is respectively connected to the forward water inlet pipe and the reverse water inlet pipe. The swing water outlet pipe is connected to the water tank.

[0059] By adopting the above technical solution, the first water pump pressurizes and conveys water into the vibration water inlet pipe and the release water inlet pipe to drive the vibration impeller and the release impeller to rotate. The water flow in the vibration box can flow into the flushing water inlet pipe after driving the vibration impeller to be used as the water for mud and sand flushing. The water flow in the release box can flow into the swing box after driving the release impeller to continue to drive the swing impeller to rotate. The water flow in the swing box can flow back into the water tank after driving the swing impeller, so that the water can be recycled, thus realizing the efficient utilization of water in the mud and sand screening device.

[0060] Optionally, a first frame is connected to the first screen. A first sand discharge hole is formed at the bottom of the side of the first frame away from the first connecting column. The first sand discharge hole discharges the mud and sand on the first screen into the first material receiving port communicated with the side wall of the screening box;

[0061] A second frame is connected to the second screen. A second sand discharge hole is formed at the bottom of the side of the second frame away from the second connecting column. The second sand discharge hole discharges the mud and sand on the second screen into the second material receiving port communicated with the side wall of the screening box.

[0062] By adopting the above technical solution, the first frame restricts the mud and sand on the first screen from easily falling from the side of the first screen. The first frame guides the mud and sand on the first screen to be discharged from the first sand discharge hole into the first material receiving port, making the screening effect of the first screen on mud and sand stable and reliable; the second frame restricts the mud and sand on the second screen from easily falling from the side of the second screen. The second frame guides the mud and sand on the second screen to be discharged from the second sand discharge hole into the second material receiving port, making the screening effect of the second screen on mud and sand stable and reliable, thereby improving the reliability of the mud and sand screening device for mud and sand screening.

[0063] In summary, the present application includes at least one of the following beneficial technical effects:

[0064] 1. By providing the first vibration assembly and the second vibration assembly, the first screen can vibrate and screen mud and sand in a manner of large amplitude and low vibration frequency, and the second screen can vibrate and screen mud and sand in a manner of low amplitude and high vibration frequency, thereby improving the screening effect of mud and sand with different particle sizes;

[0065] 2. By setting the first swing component and the second swing component, the screening time of the sediment on the first screen and the second screen is extended, improving the screening effect of the sediment.

[0066] 3. By setting the first flushing component and the second flushing component, the sediment on the first screen and the second screen can be flushed. Brief Description of the Drawings

[0067] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0068] Figure 2 is a schematic structural diagram of the first screen and the second screen;

[0069] Figure 3 is a schematic structural diagram of the first vibration component, the first swing component and the first flushing component;

[0070] Figure 4 is a schematic structural diagram of the vibrating impeller;

[0071] Figure 5 is a schematic structural diagram of the swing part, the fixed part and the release part;

[0072] Figure 6 is a schematic structural diagram of the commutation part;

[0073] Figure 7 is a schematic structural diagram of the third synchronous pulley, the fourth synchronous pulley and the second synchronous drive belt.

[0074] Description of the Reference Numerals:

[0075] 1. Screening box; 11. Water tank; 12. First water pump; 13. Second water pump; 14. First material receiving port; 15. Second material receiving port; 16. Feed pipe; 2. First screen; 21. First connecting column; 22. First frame; 23. First sand discharge hole; 3. Second screen; 31. Second connecting column; 32. Second frame; 33. Second sand discharge hole; 4. First vibration assembly; 41. Vibration box; 42. Vibration rotating shaft; 43. Vibration impeller; 44. Vibration turntable; 45. Vibration rod; 46. Vibration water inlet pipe; 47. Vibration water outlet pipe; 48. Adjusting valve; 5. Second vibration assembly; 6. First swing assembly; 61. Swing part; 611. Swing box; 612. Swing shaft; 613. Swing impeller; 614. Forward water inlet pipe; 6141. First ball valve; 615. Reverse water inlet pipe; 6151. Second ball valve; 616. Swing water outlet pipe; 62. Fixed part; 621. Fixed disk; 6211. Fixed groove; 622. Fixed slide bar; 623. Fixed spring; 63. Release part; 631. Release box; 632. Release rotating shaft; 633. Release impeller; 634. First release gear; 635. Second release gear; 636. Release disk; 6361. Release dial; 637. Release rod; 638. Release water inlet pipe; 639. Release water outlet pipe; 64. Reversing part; 641. First synchronous pulley; 642. Second synchronous pulley; 643. First synchronous drive belt; 644. Cross reversing frame; 645. Reversing lever; 7. Second swing assembly; 8. First flushing assembly; 81. Flushing water pipe; 82. Flushing nozzle; 83. Flushing water inlet pipe; 84. Third synchronous pulley; 85. Fourth synchronous pulley; 86. Second synchronous drive belt; 9. Second flushing assembly. Detailed implementation manners

[0076] The following will further elaborate on this application Figure 1-7 in conjunction with the appended drawings.

[0077] An embodiment of this application discloses a sediment screening device for water conservancy projects. Referring to Figure 1 and Figure 2 , a sediment screening device for water conservancy projects includes a screening box 1, a first screen 2, a second screen 3, a first vibration assembly 4, and a second vibration assembly 5.

[0078] Referring to Figure 2 , the screening box 1 is vertically arranged, and a feed pipe 16 is connected to the top. The first screen 2 is located inside the screening box 1 and is hinged to a first connecting column 21. The first connecting column 21 is connected to the side wall of the screening box 1. The hinge of the first screen 2 and the first connecting column 21 is located on the side wall of the first connecting column 21. The first screen 2 can vibrate the sediment on the first screen 2 by swinging relative to the first connecting column 21.

[0079] The second sieve mesh 3 is located inside the screening box 1 and below the first sieve mesh 2. The second sieve mesh 3 is hinged with a second connecting column 31, and the second connecting column 31 is connected to the side wall of the screening box 1. The screening accuracy of the second sieve mesh 3 is higher than that of the first sieve mesh 2. The hinged part of the second sieve mesh 3 and the second connecting column 31 is located on the side wall of the second connecting column 31. The second sieve mesh 3 swinging relative to the second connecting column 31 can form vibration on the sediment on the second sieve mesh 3. The first sieve mesh 2 and the second sieve mesh 3 form two-stage screening of the sediment.

[0080] The first vibration assembly 4 is arranged on the first sieve mesh 2, and the second vibration assembly 5 is arranged on the second sieve mesh 3. The second vibration assembly 5 has the same structure as the first vibration assembly 4. In this application, the first vibration assembly 4 is taken as an example for detailed description.

[0081] Refer to Figure 3 and Figure 4 As shown in, the first vibration assembly 4 includes a vibration box 41, a vibration rotating shaft 42, a vibration impeller 43, a vibration turntable 44 and a vibration rod 45.

[0082] The vibration box 41 is in a circular box shape and is fixedly connected to one side of the first sieve mesh 2. The side of the vibration box 41 away from the first sieve mesh 2 is open. The vibration rotating shaft 42 is rotatably connected inside the vibration box 41 and is coaxially arranged with the vibration box 41. The vibration impeller 43 is sleeved on the vibration rotating shaft 42 and is fixedly connected to the vibration rotating shaft 42. The vibration turntable 44 is adapted to the open side of the vibration box 41. The vibration turntable 44 is hermetically covered on the open side of the vibration box 41. The vibration turntable 44 is fixedly connected to the vibration rotating shaft 42. One end of the vibration rod 45 is rotatably connected to the vibration turntable 44, and the other end is hinged to the first connecting column 21. The vibration impeller 43 can drive the vibration turntable 44 to rotate, so that the vibration turntable 44 can drive the vibration rod 45 to swing. The swinging vibration rod 45 uses the first connecting column 21 as the support object to drive the first sieve mesh 2 to swing relative to the first connecting column 21 through the vibration turntable 44 and the vibration box 41, so that the first sieve mesh 2 vibrates to screen the sediment.

[0083] In order to facilitate driving the vibration impeller 43 to rotate, a vibration water inlet pipe 46 and a vibration water outlet pipe 47 are communicated with the vibration box 41. The communicating position of the vibration water inlet pipe 46 and the vibration box 41 is directly opposite to the blades of the vibration impeller 43. The vibration water inlet pipe 46 is used to introduce pressurized water flow into the vibration box 41, and the vibration water outlet pipe 47 is used to discharge the water in the vibration box 41 to facilitate the water flow to discharge from the vibration box 41. An adjusting valve 48 is arranged on the vibration water inlet pipe 46. The adjusting valve 48 can adjust the flow rate of the water flow in the vibration water inlet pipe 46 to facilitate controlling the rotation speed of the vibration impeller 43.

[0084] Particularly, refer to Figure 3, the connection position between the vibrating rod 45 of the first vibrating assembly 4 and the vibrating turntable 44 of the first vibrating assembly 4 is arranged near the edge position of the vibrating turntable 44, so that the vibrating amplitude of the first screen 2 driven by the vibrating rod 45 is relatively large, enabling the first screen 2 to vibrate the sediment with a large amplitude; the connection position between the vibrating rod 45 of the second vibrating assembly 5 and the vibrating turntable 44 of the second vibrating assembly 5 is arranged near the center position of the vibrating turntable 44, so that the vibrating amplitude of the second screen 3 driven by the vibrating rod 45 is relatively small, enabling the second screen 3 to vibrate the sediment with a small amplitude.

[0085] When classifying and screening sediment, the sediment is loaded into the screening box 1. The sediment first falls onto the first screen 2, and the first screen 2 performs primary screening on the sediment. The undersize material of the first screen 2 falls onto the second screen 3, and the second screen 3 performs secondary screening on the sediment, so that the sediment can be subjected to particle size classification screening to meet the requirements of different projects for the particle size of the sediment.

[0086] The vibrating water inlet pipe 46 supplies pressurized water flow into the vibrating box 41, and can make the pressurized water flow impact on the blades of the vibrating impeller 43 to drive the vibrating impeller 43 to rotate. The vibrating impeller 43 drives the vibrating rod 45 to swing through the vibrating turntable 44. The swinging vibrating rod 45 drives the vibrating box 41 to vibrate through the vibrating turntable 44, and the vibrating box 41 drives the first screen 2 to vibrate; the vibrating rod 45 of the first vibrating assembly 4 can drive the first screen 2 to vibrate, and since the connection position between the vibrating rod 45 and the vibrating turntable 44 is arranged near the edge position of the vibrating turntable 44, the vibrating amplitude of the first screen 2 is relatively large, enabling the first screen 2 to vibrate the sediment with a large amplitude; the vibrating rod 45 of the second vibrating assembly 5 can drive the second screen 3 to vibrate, and since the connection position between the vibrating rod 45 and the vibrating turntable 44 is arranged near the center position of the vibrating turntable 44, the vibrating amplitude of the second screen 3 is relatively small, enabling the second screen 3 to vibrate the sediment with a small amplitude.

[0087] By adjusting the valve 48, the flow rate of the water flow in the vibrating water inlet pipe 46 is controlled, so that the driving speed of the water flow on the vibrating impeller 43 can be regulated, thereby enabling the rotational speed of the vibrating impeller 43 to be adaptively adjusted; adjust the valve 48 of the first vibrating assembly 4 to slow down the water flow rate in the vibrating water inlet pipe 46, so that the vibrating impeller 43 of the first vibrating assembly 4 rotates slowly, thereby enabling the first screen 2 to vibrate the sediment with a low vibration frequency; adjust the valve 48 of the second vibrating assembly 5 to increase the water flow rate in the vibrating water inlet pipe 46, so that the vibrating impeller 43 of the second vibrating assembly 5 rotates quickly, thereby enabling the second screen 3 to vibrate the sediment with a high vibration frequency.

[0088] By controlling the rotational connection position between the vibrating rod 45 and the vibrating turntable 44 and the flow rate of the water flow in the vibrating water inlet pipe 46, the first screen 2 can screen the sediment with a large amplitude and a low vibration frequency, and the second screen 3 can screen the sediment with a small amplitude and a high vibration frequency, improving the screening effect of sediments with different particle sizes and enabling the precise classification of the sediment.

[0089] Refer to Figure 2 and Figure 3 In order to prevent the sediment on the first screen 2 and the second screen 3 from easily falling off from the side, a first frame 22 is fixedly connected to the first screen 2. A first sand discharge hole 23 is opened at the bottom of the side of the first frame 22 away from the first connecting column 21. The sediment on the first screen 2 is discharged through the first sand discharge hole 23 into the first material receiving port 14 communicated with the side wall of the screening box 1; a second frame 32 is fixedly connected to the second screen 3. A second sand discharge hole 33 is opened at the bottom of the side of the second frame 32 away from the second connecting column 31. The sediment on the second screen 3 is discharged through the second sand discharge hole 33 into the second material receiving port 15 communicated with the side wall of the screening box 1.

[0090] The first frame 22 restricts the sediment on the first screen 2 from easily falling off from the side of the first screen 2. The first frame 22 guides the sediment on the first screen 2 to be discharged from the first sand discharge hole 23 into the first material receiving port 14, making the screening effect of the first screen 2 on the sediment stable and reliable; the second frame 32 restricts the sediment on the second screen 3 from easily falling off from the side of the second screen 3. The second frame 32 guides the sediment on the second screen 3 to be discharged from the second sand discharge hole 33 into the second material receiving port 15, making the screening effect of the second screen 3 on the sediment stable and reliable, thereby improving the reliability of the sediment screening device for screening the sediment.

[0091] Refer to Figure 3 In order to extend the screening time of the sediment on the first screen 2 and the second screen 3 to improve the screening effect of the first screen 2 and the second screen 3, a first swinging assembly 6 is provided at one end of the first connecting column 21, and a second swinging assembly 7 is provided at one end of the second connecting column 31. The first swinging assembly 6 and the second swinging assembly 7 have the same structure. In this application, the first swinging assembly 6 is taken as an example for detailed description.

[0092] Refer to Figure 2 The first connecting column 21 and the second connecting column 31 are respectively arranged close to two opposite side walls of the screening box 1 and are both rotatably connected to the screening box 1.

[0093] Refer to Figure 5 The first swinging assembly 6 includes a swinging part 61. The swinging part 61 includes a swinging box 611, a swinging shaft 612 and a swinging impeller 613.

[0094] The swing box 611 is fixedly connected to the screening box 1. The swing shaft 612 rotatably penetrates through the swing box 611, and one end of the swing shaft 612 located outside the swing box 611 is fixedly connected to the end of the first connecting column 21. The swing impeller 613 is located inside the swing box 611 and sleeved on the swing shaft 612, and the swing impeller 613 is fixedly connected to the swing shaft 612. The swing impeller 613 can drive the first connecting column 21 to rotate, so that the first connecting column 21 can drive the first screen 2 to swing around the rotation axis of the first connecting column 21. During the process of the first screen 2 swinging around the rotation axis of the first connecting column 21, the screening time of the sediment is extended.

[0095] Referring to Figure 5 and Figure 6 , in order to facilitate driving the swing impeller 613 to rotate forward and backward, so that the first screen 2 can swing up and down reciprocally around the rotation axis of the first connecting column 21, a forward water inlet pipe 614, a reverse water inlet pipe 615 and a swing water outlet pipe 616 are communicated with the swing box 611. The forward water inlet pipe 614 and the reverse water inlet pipe 615 are symmetrically arranged on both sides of the swing shaft 612. The communication part of the forward water inlet pipe 614 and the swing box 611 faces the blade of the swing impeller 613, and the communication part of the reverse water inlet pipe 615 and the swing box 611 faces the blade of the swing impeller 613. The communication part of the swing water outlet pipe 616 and the swing box 611 is located on the side of the swing shaft 612 away from the forward water inlet pipe 614 and the reverse water inlet pipe 615, and the communication part of the swing water outlet pipe 616 and the swing box 611 is located between the forward water inlet pipe 614 and the reverse water inlet pipe 615.

[0096] Referring to Figure 5 , both the forward water inlet pipe 614 and the reverse water inlet pipe 615 are used to introduce pressurized water flow into the swing box 611. A first ball valve 6141 is arranged on the forward water inlet pipe 614, and a second ball valve 6151 is arranged on the reverse water inlet pipe 615. The swing water outlet pipe 616 is used to discharge the water in the swing box 611. The first ball valve 6141 is used to control the opening and closing of the forward water inlet pipe 614, and the second ball valve 6151 is used to control the opening and closing of the reverse water inlet pipe 615.

[0097] Referring to Figure 3 and Figure 6 , when the first ball valve 6141 is opened and the second ball valve 6151 is closed, the forward water inlet pipe 614 introduces pressurized water flow into the swing box 611, so that the first screen 2 can swing from downward inclination to upward inclination around the rotation axis of the first connecting column 21; when the first ball valve 6141 is closed and the second ball valve 6151 is opened, the reverse water inlet pipe 615 introduces pressurized water flow into the swing box 611, so that the first screen 2 can swing from upward inclination to downward inclination around the rotation axis of the first connecting column 21. By adjusting the opening and closing of the first ball valve 6141 and the second ball valve 6151, the rotation direction of the swing impeller 613 can be controlled.

[0098] Open the first ball valve 6141 and close the second ball valve 6151, so that the pressurized water flow enters the swing box 611 from the forward water inlet pipe 614. The pressurized water flow impacts on the blades of the swing impeller 613 to drive the swing impeller 613 to rotate forward. The swing impeller 613 drives the first connecting column 21 to rotate, so that the first screen 2 swings upward around the rotation axis of the first connecting column 21; open the second ball valve 6151 and close the first ball valve 6141, so that the pressurized water flow enters the swing box 611 from the reverse water inlet pipe 615. The pressurized water flow impacts on the blades of the swing impeller 613 to drive the swing impeller 613 to rotate reversely. The swing impeller 613 drives the first connecting column 21 to rotate, so that the first screen 2 swings downward around the rotation axis of the first connecting column 21; thus, by adjusting the opening and closing of the first ball valve 6141 and the second ball valve 6151, the first screen 2 can swing up and down reciprocally around the rotation axis of the first connecting column 21, extending the screening time of the sediment on the first screen 2 and improving the screening effect of the sediment.

[0099] Refer to Figure 5 In order to further extend the screening time of the sediment on the first screen 2 so that the first connecting column 21 can rotate intermittently, the first swing assembly 6 further includes a fixing part 62 and a releasing part 63. The fixing part 62 is respectively connected to the first connecting column 21 and the screening box 1. The fixing part 62 is used to fix the first connecting column 21 relative to the screening box 1. The releasing part 63 is connected to the screening box 1 and is used to intermittently release the fixing of the fixing part 62 on the first connecting column 21. After the fixing of the fixing part 62 on the first connecting column 21 is released, the first connecting column 21 can rotate by a fixed angle. After the first connecting column 21 rotates by a fixed angle, the fixing part 62 fixes the first connecting column 21 relative to the screening box 1 again.

[0100] Since the releasing part 63 can intermittently release the fixing of the fixing part 62 on the first connecting column 21, and after the first connecting column 21 is released from fixation and rotates by a fixed angle, the fixing part 62 can fix the first connecting column 21 again, the first connecting column 21 can rotate intermittently, so that the first screen 2 can swing intermittently around the rotation axis of the first connecting column 21, and further extend the time for the first screen 2 to swing from upward inclination to downward inclination around the rotation axis of the first connecting column 21.

[0101] Specifically, refer to Figure 5 The fixing part 62 includes a fixing disk 621, a fixing slide bar 622 and a fixing spring 623.

[0102] The fixed disk 621 is fixedly connected to the end of the first connecting column 21. A plurality of fixing grooves 6211 are circumferentially formed on the side wall of the fixed disk 621. The fixed sliding rod 622 is slidably connected to the screening box 1, and the sliding direction is towards or away from the fixed disk 621. The fixed spring 623 is fixedly arranged between the fixed sliding rod 622 and the screening box 1, and is used to drive the end of the fixed sliding rod 622 to be inserted into any one of the fixing grooves 6211.

[0103] Insert the end of the fixed sliding rod 622 into the fixing groove 6211, so that the fixed disk 621 can be fixed relative to the screening box 1, and thus the first connecting column 21 can be fixed to the screening box 1 by relying on the fixed sliding rod 622; when an external force drives the end of the fixed sliding rod 622 to slide out of the fixing groove 6211, the rotating state of the first connecting column 21 can be quickly restored; when the external force driving the fixed sliding rod 622 is withdrawn during the rotation of the first connecting column 21, under the elastic force of the fixed spring 623, the end of the fixed sliding rod 622 can abut against the side wall of the fixed disk 621 until the next fixing groove 6211 rotates to the position of the fixed sliding rod 622, and the fixed sliding rod 622 can be re-inserted into the fixing groove 6211 under the elastic force of the fixed spring 623 to re-fix the fixed disk 621 to the screening box 1, so that the first connecting column 21 is easy to fix and can be automatically re-fixed after the fixation is released.

[0104] Specifically, referring to Figure 5 and Figure 6 , the releasing part 63 includes a releasing box 631, a releasing rotating shaft 632, a releasing impeller 633, a first releasing gear 634, a second releasing gear 635, a releasing disk 636 and a releasing rod 637.

[0105] Referring to Figure 5 , the releasing box 631 is fixedly connected to the screening box 1. The releasing rotating shaft 632 rotatably penetrates through the releasing box 631. The releasing impeller 633 is located inside the releasing box 631 and sleeved on the releasing rotating shaft 632, and the releasing impeller 633 is fixedly connected to the releasing rotating shaft 632.

[0106] Referring to Figure 5 and Figure 6 , the first releasing gear 634 is located outside the releasing box 631 and fixedly connected to the releasing rotating shaft 632. The first releasing gear 634 is an incomplete gear. The second releasing gear 635 is rotatably connected to the screening box 1, and the second releasing gear 635 meshes with the first releasing gear 634 intermittently. The first releasing gear 634 can intermittently drive the second releasing gear 635 to rotate.

[0107] Referring to Figure 6, the release disc 636 is disengaged from the second release gear 635, and a plurality of release blocks 6361 are uniformly connected to the side wall of the release disc 636 in the circumferential direction. The release rod 637 is fixedly connected to the fixed slide rod 622. When the release rod 637 is toggled, the end of the fixed slide rod 622 can be disengaged from the fixed groove 6211.

[0108] Refer to Figure 5 , in order to facilitate driving the release impeller 633 to rotate, a release water inlet pipe 638 and a release water outlet pipe 639 are connected to the release box 631. The connection between the release water inlet pipe 638 and the release box 631 is opposite to the blades of the release impeller 633. The release water inlet pipe 638 is used to introduce pressurized water flow into the release box 631, and the release water outlet pipe 639 is used to discharge the water in the release box 631.

[0109] Specifically, refer to Figure 5 , the release block 6361 is used to toggle the release rod 637 to move during the rotation of the release disc 636. When the release block 6361 passes by the release rod 637, the release rod 637 drives the end of the fixed slide rod 622 to completely disengage from the fixed groove 6211.

[0110] The pressurized water flow in the release water inlet pipe 638 can impact on the blades of the release impeller 633. The release impeller 633 drives the first release gear 634 to rotate continuously. The first release gear 634 intermittently drives the second release gear 635 to rotate. The second release gear 635 intermittently drives the release disc 636 to rotate. The release disc 636 intermittently drives all the release blocks 6361 to rotate. All the release blocks 6361 sequentially toggle the release rod 637 to move. Since when the release block 6361 passes by the release rod 637, the release rod 637 drives the end of the fixed slide rod 622 to completely disengage from the fixed groove 6211, the fixed slide rod 622 can intermittently disengage from the fixed groove 6211 under the intermittent toggling of the release block 6361, so that the fixed state of the fixed disc 621 can be intermittently released.

[0111] Refer to Figure 6 , in order to automatically switch the opening and closing states of the first ball valve 6141 and the second ball valve 6151 while releasing the fixation of the fixed slide rod 622 to the fixed disc 621, a reversing part 64 is commonly connected to the first ball valve 6141 and the second ball valve 6151. Both the fixing part 62 and the releasing part 63 are located on the side of the first connecting column 21 close to the swing box 611.

[0112] The reversing part 64 includes a first synchronous pulley 641, a second synchronous pulley 642, a first synchronous drive belt 643, a cross reversing frame 644 and a reversing lever 645.

[0113] The first synchronous pulley 641 is fixedly connected to the valve stem of the first ball valve 6141. The second synchronous pulley 642 is fixedly connected to the valve stem of the second ball valve 6151. The first synchronous drive belt 643 is wound around the first synchronous pulley 641 and the second synchronous pulley 642. The opening and closing state of the first ball valve 6141 is opposite to the opening and closing state of the second ball valve 6151, that is, when the first ball valve 6141 is opened, the second ball valve 6151 is closed, and when the first ball valve 6141 is closed, the second ball valve 6151 is opened.

[0114] The cross reversing frame 644 is cross-shaped, and the center of the cross reversing frame 644 is fixedly connected to the valve stem of the second ball valve 6151, and the cross reversing frame 644 can drive the valve stem of the second ball valve 6151 to rotate. The reversing lever 645 is fixedly connected to the release disk 636, and the reversing lever 645 is used to drive the cross reversing frame 644 to rotate during the rotation of the release disk 636.

[0115] After the release block 6361 drives the end of the fixed slide rod 622 to completely disengage from the fixed groove 6211, the reversing lever 645 just drives the cross reversing frame 644 to rotate 90°. When the fixation of the fixed slide rod 622 to the fixed disk 621 is released, the automatic switching of the opening and closing states of the first ball valve 6141 and the second ball valve 6151 can be achieved, so that the swinging direction of the first screen 2 around the rotation axis of the first connecting column 21 can be automatically switched after the release disk 636 rotates one circle.

[0116] During the intermittent rotation, the release disk 636 can not only enable the release block 6361 to move the release rod 637, but also drive the reversing rod 645 to move the cross reversing frame 644 after one rotation. The cross reversing frame 644 can drive the valve stem of the second ball valve 6151 to rotate 90° to achieve the switching of the opening and closing state of the second ball valve 6151. Under the transmission action of the first synchronous pulley 641, the second synchronous pulley 642 and the first synchronous driving belt 643, the opening and closing state of the first ball valve 6141 can follow the switching, and since the opening and closing state of the first ball valve 6141 is opposite to the opening and closing state of the second ball valve 6151, the direction of the swing impeller 613 can be switched, so that the first connecting column 21 can automatically switch the rotation direction after rotating in a single direction for a fixed angle, and the first screen 2 can automatically switch the swing direction after swinging in a single direction for a fixed angle around the rotation axis of the first connecting column 21.

[0117] Reference Figure 2, in order to enable the mud and sand to be washed during the screening process to remove the soil in the mud and sand, a first washing component 8 and a second washing component 9 are arranged in the screening box 1. The first washing component 8 is located between the first screen 2 and the second screen 3 and is arranged close to the side wall of the screening box 1 opposite to the first connecting column 21. The second washing component 9 is located on the side of the second screen 3 away from the first screen 2 and is arranged close to the side wall of the screening box 1 opposite to the second connecting column 31. The first washing component 8 and the second washing component 9 have the same structure. In this application, the first washing component 8 is taken as an example for detailed description.

[0118] Referring to Figure 3 , the first washing component 8 includes a washing water pipe 81 and a washing nozzle 82.

[0119] Referring to Figure 2 and Figure 3 , the washing water pipe 81 is in a circular tubular shape and is connected to the side wall of the screening box 1. A plurality of washing nozzles 82 are provided and are all connected to the washing water pipe 81. The plurality of washing nozzles 82 are arranged along the axial direction of the washing water pipe 81, and the washing nozzles 82 face the first screen 2. One end of the washing water pipe 81 is connected with a washing water inlet pipe 83, and the washing water inlet pipe 83 is used for introducing pressurized water flow into the washing water pipe 81.

[0120] The washing water inlet pipe 83 introduces the pressurized water flow into the washing water pipe 81, and the pressurized water flow is sprayed from the washing nozzles 82 onto the first screen 2. The water flow sprayed by the washing nozzles 82 can wash the mud and sand on the first screen 2 to remove the soil in the mud and sand. At the same time, the water flow can dredge the mesh holes of the first screen 2, so that the first screen 2 is not easily blocked.

[0121] Furthermore, referring to Figure 2 , Figure 3 and Figure 7 , the washing water pipe 81 is rotatably connected to the screening box 1 and is also rotatably connected to the washing water inlet pipe 83. One end of the washing water pipe 81 away from the washing water inlet pipe 83 is fixedly connected with a third synchronous pulley 84, and one end of the first connecting column 21 close to the third synchronous pulley 84 is fixedly connected with a fourth synchronous pulley 85. A second synchronous drive belt 86 is wound around the third synchronous pulley 84 and the fourth synchronous pulley 85 together. When the first screen 2 is tilted upward, the water flow sprayed by the washing nozzles 82 impacts on the position of the first screen 2 close to the first connecting column 21.

[0122] Through the third synchronous pulley 84, the fourth synchronous pulley 85 and the second synchronous drive belt 86, when the first connecting column 21 rotates, it can drive the flushing water pipe 81 to rotate synchronously, so that the direction of the water jet from the flushing nozzle 82 can be adjusted synchronously with the swing of the first screen 2 around the rotation axis of the first connecting column 21, so that the water jet from the flushing nozzle 82 can fully flush the first screen 2; since when the first screen 2 is tilted upward, the water jet from the flushing nozzle 82 impacts on the position of the first screen 2 close to the first connecting column 21, so that when the first screen 2 is tilted downward, the water jet from the flushing nozzle 82 can impact on the position of the first screen 2 far from the first connecting column 21. Thus, in the process of the first screen 2 gradually swinging downward around the rotation axis of the first connecting column 21, the jet point of the water jet from the flushing nozzle 82 on the first screen 2 can gradually move away from the first connecting column 21, so that the water jet from the flushing nozzle 82 can hinder the discharge of sediment on the first screen 2, thereby prolonging the screening time of sediment on the first screen 2.

[0123] Referring to Figure 2 , in order to make efficient use of the water in the sediment screening device, a water tank 11 is fixedly connected to one side of the screening box 1. The water tank 11 is located inside the screening box 1 and is used for storing water. The water tank 11 is connected to a first water pump 12 and a second water pump 13. The first water pump 12 is used to supply water to the first vibration assembly 4, the first swing assembly 6 and the first flushing assembly 8, and the second water pump 13 is used to supply water to the second vibration assembly 5, the second swing assembly 7 and the second flushing assembly 9, and the water supply pipeline of the first water pump 12 is the same as that of the second water pump 13.

[0124] Referring to Figure 3 and Figure 7 , the water outlet of the first water pump 12 is respectively connected to the vibration water inlet pipe 46 and the release water inlet pipe 638. The vibration water outlet pipe 47 is connected to the flushing water inlet pipe 83. The release water outlet pipe 639 is respectively connected to the forward water inlet pipe 614 and the reverse water inlet pipe 615. The swing water outlet pipe 616 is connected to the water tank 11.

[0125] The first water pump 12 pressurizes and conveys water into the vibration water inlet pipe 46 and the release water inlet pipe 638 to drive the vibration impeller 43 and the release impeller 633 to rotate. The water flow in the vibration box 41 can flow into the flushing water inlet pipe 83 after driving the vibration impeller 43 and is used as sediment flushing water. The water flow in the release box 631 can flow into the swing box 611 after driving the release impeller 633 to continue to drive the swing impeller 613 to rotate. The water flow in the swing box 611 can flow back to the water tank 11 after driving the swing impeller 613, so that the water can be recycled, thus realizing the efficient use of water in the sediment screening device.

[0126] The implementation principle of a sediment screening device for water conservancy projects in an embodiment of this application is as follows: During use, the sediment is loaded into the screening box 1. The first vibration assembly 4 drives the first screen 2 to vibrate for screening, the second vibration assembly 5 drives the second screen 3 to vibrate for screening, the first swinging assembly 6 drives the first screen 2 to swing up and down reciprocally around the rotation axis of the first connecting column 21, the second swinging assembly 7 drives the second screen 3 to swing up and down reciprocally around the rotation axis of the second connecting column 31, the first flushing assembly 8 performs swinging flushing on the sediment on the first screen 2, and the second flushing assembly 9 performs swinging flushing on the sediment on the second screen 3, improving the screening effect of sediment with different particle sizes and enabling the sediment to be accurately classified.

[0127] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A mud and sand screening device for water conservancy projects, characterized in that: include: Screening box; A first screen is located in the screening box and is hinged with a first connecting column, and the first connecting column is connected to the side wall of the screening box; The second screen is located in the screening box and below the first screen. The second screen is hinged with a second connecting column, and the second connecting column is connected to the side wall of the screening box. The screening accuracy of the second screen is higher than that of the first screen. A first vibrating assembly is disposed on the first screen; A second vibration assembly is disposed on the second screen and has the same structure as the first vibration assembly; in, The first vibration assembly includes: A vibration box is connected to one side of the first screen, and the side away from the first screen is open; A vibration shaft, rotatably connected in the vibration box; A vibrating impeller is sleeved on the vibrating shaft; A vibration turntable, a sealing cover is arranged on the opening side of the vibration box and connected to the vibration shaft; A vibration rod, one end of which is rotatably connected to the vibration turntable, and the other end of which is hinged to the first connection column; The vibration box is connected with a vibration water inlet pipe and a vibration water outlet pipe. The connection position of the vibration water inlet pipe and the vibration box is just opposite to the blades of the vibration impeller. The vibration water inlet pipe is used to introduce pressurized water into the vibration box, and the vibration water outlet pipe is used to discharge water in the vibration box. The vibration water inlet pipe is provided with a regulating valve; The rotation connection position between the vibration rod of the first vibration assembly and the vibration turntable of the first vibration assembly is arranged near the edge of the vibration turntable; the rotation connection position between the vibration rod of the second vibration assembly and the vibration turntable of the second vibration assembly is arranged near the center of the vibration turntable; The first connecting column and the second connecting column are respectively arranged close to the two side walls facing the screening box, and are both rotatably connected to the screening box. A first swing assembly is arranged at one end of the first connecting column, and a second swing assembly is arranged at one end of the second connecting column. The first swing assembly and the second swing assembly have the same structure. The first swing assembly includes a swing part, and the swing part includes a swing box, a swing shaft and a swing impeller; The swing box is connected to the screening box, the swing shaft is rotatably arranged on the swing box and connected to the end of the first connecting column, the swing impeller is located in the swing box and sleeved on the swing shaft; The swing box is connected with a forward water inlet pipe, a reverse water inlet pipe and a swing water outlet pipe. The forward water inlet pipe and the reverse water inlet pipe are symmetrically arranged on both sides of the swing axis. The connection point between the forward water inlet pipe and the swing box is opposite to the blades of the swing impeller, and the connection point between the reverse water inlet pipe and the swing box is opposite to the blades of the swing impeller. The first swing component is used to drive the first screen to tilt and swing up and down.

2. A mud and sand screening device for water conservancy projects according to claim 1, characterized in that: The forward water inlet pipe and the reverse water inlet pipe are both used to introduce pressurized water into the swing box, a first ball valve is provided on the forward water inlet pipe, a second ball valve is provided on the reverse water inlet pipe, and the swing water outlet pipe is used to discharge water in the swing box; When the first ball valve is opened and the second ball valve is closed, the forward water inlet pipe passes pressurized water into the swing box, so that the first screen can swing from a downward tilt to an upward tilt. When the first ball valve is closed and the second ball valve is opened, the reverse water inlet pipe passes pressurized water into the swing box, so that the first screen can swing from an upward tilt to a downward tilt.

3. A mud and sand screening device for water conservancy projects according to claim 2, characterized in that: The first swing assembly also includes a fixing part and a releasing part, the fixing part is connected to the first connecting column and the screening box respectively, the fixing part is used to fix the first connecting column relative to the screening box, the releasing part is connected to the screening box, and is used to intermittently release the fixing of the first connecting column by the fixing part, after the fixing of the first connecting column by the fixing part is released, the first connecting column can be rotated by a fixed angle, and after the first connecting column is rotated by a fixed angle, the fixing part fixes the first connecting column relative to the screening box again.

4. A mud and sand screening device for water conservancy projects according to claim 3, characterized in that: The fixing part includes a fixing plate, a fixing slide rod and a fixing spring. The fixing plate is connected to the end of the first connecting column. A plurality of fixing grooves are circumferentially provided on the side wall of the fixing plate. The fixing slide rod is slidably connected to the screening box. The fixing spring is arranged between the fixing slide rod and the screening box and is used to drive the end of the fixing slide rod to be inserted into any one of the fixing grooves.

5. A mud and sand screening device for water conservancy projects according to claim 4, characterized in that: The release unit comprises: A release box connected to the screening box; A release shaft is rotatably arranged on the release box; The release impeller is located in the release box and sleeved on the release shaft; A first release gear is located outside the release box and connected to the release shaft, and the first release gear is an incomplete gear; A second release gear is rotatably connected to the screening box, and the second release gear is intermittently meshed with the first release gear; A release plate is connected to the second release gear, and a plurality of release blocks are evenly connected to the side wall of the release plate along the circumferential direction; a release rod connected to the fixed slide rod; The release box is connected with a release water inlet pipe and a release water outlet pipe, the connection point between the release water inlet pipe and the release box is directly opposite to the blades of the release impeller, the release water inlet pipe is used to introduce pressurized water into the release box, and the release water outlet pipe is used to discharge water in the release box; The release block is used to push the release rod to move during the rotation of the release disk. When the release block pushes past the release rod, the release rod drives the end of the fixed slide rod to completely escape from the fixed groove.

6. A mud and sand screening device for water conservancy projects according to claim 5, characterized in that: The fixing part and the releasing part are both located on the side of the first connecting column close to the swing box, the first ball valve and the second ball valve are commonly connected with a reversing part, and the reversing part includes a first synchronous pulley, a second synchronous pulley, a first synchronous driving belt, a cross reversing frame and a reversing lever; The first synchronous pulley is connected to the valve stem of the first ball valve, the second synchronous pulley is connected to the valve stem of the second ball valve, the first synchronous drive belt is wound around the first synchronous pulley and the second synchronous pulley, and the opening and closing state of the first ball valve is opposite to the opening and closing state of the second ball valve; The center part of the cross reversing frame is connected to the valve stem of the second ball valve, the reversing lever is connected to the release disk, and the reversing lever is used to drive the cross reversing frame to rotate in the process of rotating with the release disk; After the release block drives the end of the fixed slide rod to completely escape from the fixed groove, the reversing lever just drives the cross reversing frame to rotate 90°.

7. The mud and sand screening device for water conservancy engineering according to claim 5, characterized in that: The screening box is provided with a first flushing assembly and a second flushing assembly, the first flushing assembly is located between the first screen and the second screen, and is arranged close to the side wall of the screening box directly facing the first connecting column, the second flushing assembly is located on the side of the second screen away from the first screen, and is arranged close to the side wall of the screening box directly facing the second connecting column, and the first flushing assembly and the second flushing assembly have the same structure; The first flushing component includes a flushing water pipe and a flushing nozzle. The flushing water pipe is connected to the side wall of the screening box. There are multiple flushing nozzles, which are all connected to the flushing water pipe. The flushing nozzles are facing the first screen. One end of the flushing water pipe is connected to a flushing water inlet pipe, which is used to introduce pressurized water into the flushing water pipe.

8. The mud and sand screening device for water conservancy projects according to claim 7, characterized in that: The flushing water pipe is rotatably connected to the screening box and to the flushing water inlet pipe. The end of the flushing water pipe away from the flushing water inlet pipe is connected to a third synchronous pulley, and the end of the first connecting column close to the third synchronous pulley is connected to a fourth synchronous pulley. A second synchronous drive belt is wound around the third synchronous pulley and the fourth synchronous pulley. When the first screen is tilted upward, the water flow sprayed by the flushing nozzle impacts the position of the first screen close to the first connecting column.

9. The mud and sand screening device for water conservancy projects according to claim 7, characterized in that: A water tank is provided on one side of the screening box, the water tank is used to hold water, the water tank is connected to a first water pump and a second water pump, the first water pump is used to supply water to the first vibration assembly, the first swing assembly and the first flushing assembly, the second water pump is used to supply water to the second vibration assembly, the second swing assembly and the second flushing assembly, and the water supply pipeline of the first water pump is the same as the water supply pipeline of the second water pump; The water outlet of the first water pump is connected with the vibration water inlet pipe and the release water inlet pipe respectively, the vibration water outlet pipe is connected with the flushing water inlet pipe, the release water outlet pipe is connected with the forward water inlet pipe and the reverse water inlet pipe respectively, and the swing water outlet pipe is connected with the water tank.

10. The mud and sand screening device for water conservancy engineering according to claim 1, characterized in that: The first screen is connected to a first frame, and a first sand row hole is provided on the bottom of the first frame away from the first connecting column, and the first sand row hole discharges mud and sand on the first screen to a first material receiving port connected to the side wall of the screening box; The second screen is connected with a second frame, and a second row of sand holes is provided at the bottom of the second frame away from the second connecting column. The second row of sand holes discharges mud and sand on the second screen into a second material receiving port connected to the side wall of the screening box.

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