Mud and sand screening device for water conservancy project

Abstract

The invention relates to a mud and sand screening device for hydraulic engineering, and relates to the technical field of mud and sand screening. The first screen is located in the screening box and hinged to 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 located below the first screen, a second connecting column is hinged to the second screen and connected to the side wall of the screening box, and the screening precision of the second screen is higher than that of the first screen; the first vibration assembly is arranged on the first screen; the second vibration assembly is arranged on the second screen, and the second vibration assembly and the first vibration assembly are of the same structure; wherein the first vibration assembly is used for enabling the first screen to vibrate and separate mud and sand in a large-amplitude and low-vibration-frequency mode, and the second vibration assembly is used for enabling the second screen to vibrate and separate mud and sand in a low-amplitude and high-vibration-frequency mode. The screening device has the effect of improving the screening effect of mud sand with different particle sizes.

Description

Technical Field

[0001] The present application relates to the technical field of mud and sand screening, and in particular to a mud and sand screening device for water conservancy projects. Background Art

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

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

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

[0005] In order to improve the screening effect of mud and sand of different particle sizes so that the mud and sand can be accurately classified, the present application provides a mud and sand screening device for water conservancy projects.

[0006] The present application provides a mud and sand screening device for water conservancy projects, which adopts the following technical solution: A mud and sand screening device for water conservancy projects, comprising: 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 rotational connection position between the vibration rod of the first vibration component and the vibration turntable of the first vibration component is set close to the edge of the vibration turntable; the rotational connection position between the vibration rod of the second vibration component and the vibration turntable of the second vibration component is set close to the center of the vibration turntable.

[0007] By adopting the above technical solution, the vibrating water inlet pipe supplies pressurized water to the vibration box, and the pressurized water can impact the blades of the vibrating impeller to drive the vibrating impeller to rotate. The vibrating impeller drives the vibrating rod to swing through the vibrating turntable, and the swinging vibrating rod drives the vibrating box to vibrate through the vibrating turntable, and the vibrating box drives the first screen to vibrate; the vibrating rod of the first vibrating component can drive the first screen to vibrate, and because the rotation connection position of the vibrating rod and the vibrating turntable is set close to the edge position of the vibrating turntable, the vibration amplitude of the first screen is large, so that the first screen can vibrate mud and sand with a large amplitude; the vibrating rod of the second vibrating component can drive the second screen to vibrate, and because the rotation connection position of the vibrating rod and the vibrating turntable is set close to the center position of the vibrating turntable, the vibration amplitude of the second screen is small, so that the second screen can vibrate mud and sand with a small amplitude.

[0008] The flow rate of water in the vibrating water inlet pipe is controlled by adjusting the valve, so that the water flow can regulate the driving speed of the vibrating impeller, thereby allowing the speed of the vibrating impeller to be adaptively adjusted; the regulating valve of the first vibrating component is adjusted 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, thereby allowing the first screen to vibrate mud and sand at a low frequency; the regulating valve of the second vibrating component is adjusted to speed up the water flow rate in the vibrating water inlet pipe, so that the vibrating impeller of the second vibrating component rotates quickly, thereby allowing the second screen to vibrate mud and sand at a high frequency.

[0009] By controlling the rotational connection position of the vibration rod and the vibration turntable and the flow rate of the water in the vibrating water inlet pipe, the first screen can screen mud and sand with a large amplitude and low frequency, and the second screen can screen mud and sand with a small amplitude and high frequency, thereby improving the screening effect of mud and sand with different particle sizes and enabling accurate classification of mud and sand.

[0010] Optionally, the first connecting column and the second connecting column are respectively arranged close to two side walls facing the screening box, and are both rotatably connected to the screening box, a first swinging assembly is arranged at one end of the first connecting column, and a second swinging assembly is arranged at one end of the second connecting column, and the first swinging assembly and the second swinging 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 shaft. The connection point of the forward water inlet pipe and the swing box is directly opposite to the blades of the swing impeller, and the connection point of the reverse water inlet pipe and the swing box is directly opposite to the blades of the swing impeller. 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.

[0011] 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 is passed into the swing box from the forward water inlet pipe, and the pressurized water flow impacts the blades of the swing impeller to drive the swing impeller to rotate forward, and the swing impeller drives the first connecting column to rotate, so that the first screen is swung 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 is passed into the swing box from the reverse water inlet pipe, and the pressurized water flow impacts the blades of the swing impeller to drive the swing impeller to rotate reversely, and the swing impeller drives the first connecting column to rotate, so that the first screen is swung downward around the rotation axis of the first connecting column; thus, by regulating the switches of the first ball valve and the second ball valve, the first screen can be swung back and forth up and down around the rotation axis of the first connecting column, thereby extending the screening time of mud and sand on the first screen and improving the screening effect of mud and sand.

[0012] Optionally, the first swing assembly also includes a fixing part and a releasing part, the fixing part being connected to the first connecting column and the screening box respectively, the fixing part being used to fix the first connecting column relative to the screening box, the releasing part being connected to the screening box and being 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.

[0013] By adopting the above technical solution, since the releasing part can intermittently release the fixation of the fixing part to the first connecting column, and after the first connecting column is released and rotated to a fixed angle, the fixing part can re-fix the first connecting column, so that the first connecting column can be intermittently rotated, thereby allowing the first screen to intermittently swing around the rotation axis of the first connecting column, thereby extending the time for the first screen to swing from an upward tilt to a downward tilt around the rotation axis of the first connecting column.

[0014] Optionally, the fixing part includes a fixed plate, a fixed slide rod and a fixed spring, the fixed plate is connected to the end of the first connecting column, a plurality of fixed grooves are circumferentially opened on the side wall of the fixed plate, the fixed slide rod is slidably connected to the screening box, the fixed spring is arranged between the fixed slide rod and the screening box, and is used to drive the end of the fixed slide rod to be inserted into any one of the fixed grooves.

[0015] 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.

[0016] Optionally, the release unit includes: A release box connected to the screening box; A release shaft is rotatably arranged on the release box; A 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.

[0017] By adopting the above technical solution, the pressurized water flow in the water inlet pipe can impact 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 disk to rotate, the release disk intermittently drives all the release blocks to rotate, and all the release blocks sequentially drive the release rod to move, because when the release block pushes the release rod, the release rod drives the end of the fixed slide rod to completely disengage from the fixed groove, so that the fixed slide rod can intermittently disengage from the fixed groove under the intermittent toggling of the release block, so that the fixed state of the fixed disk can be intermittently released.

[0018] Optionally, the fixing part and the releasing part are both located on a 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 drive 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°.

[0019] By adopting the above technical solution, the release disk can not only enable the release block to move the release rod during the intermittent rotation process, but also drive the reversing lever to move the cross reversing frame after rotating one circle, and 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 state 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 state of the first ball valve can follow the switching, and because the opening and closing state of the first ball valve is opposite to the opening and closing state of the second ball valve, the direction of the swing impeller can be switched, so that the first connecting column can automatically switch the rotation direction after rotating in a single direction for a fixed angle, and the first screen can automatically switch the swing direction after swinging in a single direction around the rotation axis of the first connecting column for a fixed angle.

[0020] Optionally, a first flushing assembly and a second flushing assembly are provided 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 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.

[0021] By adopting the above technical solution, the flushing water inlet pipe will flow pressurized water into the flushing water pipe, and the pressurized water will be sprayed from the flushing nozzle onto the first screen. The water flow sprayed from the flushing nozzle can flush the mud and sand on the first screen to remove the mud in the mud and sand. At the same time, the water flow can dredge the mesh of the first screen, so that the first screen is not easily blocked.

[0022] Optionally, 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, the end of the first connecting column close to the third synchronous pulley is connected to a fourth synchronous pulley, and a second synchronous drive belt is wound around the third synchronous pulley and the fourth synchronous pulley together, and when the first screen is tilted upward, the water jetted from the flushing nozzle impacts the position of the first screen close to the first connecting column.

[0023] By adopting the above technical scheme, the first connecting column can drive the flushing water pipe to rotate synchronously through the third synchronous pulley, the fourth synchronous pulley and the second synchronous drive belt, so that the direction of the water flow sprayed by the flushing nozzle 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 nozzle can fully flush the first screen; because 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, so that when the first screen is tilted downward, the water flow sprayed by the flushing nozzle can impact the position of the first screen away from the first connecting column, so that in the process of the first screen gradually swinging downward around the rotation axis of the first connecting column, the injection point of the water flow sprayed by the flushing nozzle on the first screen can gradually move away from the first connecting column, so that the water flow sprayed by the flushing nozzle can hinder the discharge of mud and sand on the first screen, thereby extending the screening time of mud and sand on the first screen.

[0024] Optionally, 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.

[0025] By adopting the above technical scheme, the first water pump conveys water under pressure to the vibrating water inlet pipe and the release water inlet pipe to drive the vibrating 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 vibrating impeller to be used as water for flushing mud and sand. The water flow in the release box can flow into the swing box after driving the release impeller to continue driving the swing impeller to rotate. The water flow in the swing box can flow back to the water tank after driving the swing impeller, so that the water can be recycled, thereby realizing efficient utilization of water in the mud and sand screening device.

[0026] Optionally, the first screen is connected to a first frame, and a first sand row hole is provided at 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 into 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.

[0027] By adopting the above technical solution, the first frame limits the mud and sand on the first screen from falling off from the side of the first screen, and the first frame guides the mud and sand on the first screen to be discharged from the first sand row holes to the first material receiving port, so that the first screen has a stable and reliable screening effect on the mud and sand; the second frame limits the mud and sand on the second screen from falling off from the side of the second screen, and the second frame guides the mud and sand on the second screen to be discharged from the second sand row holes to the second material receiving port, so that the second screen has a stable and reliable screening effect on the mud and sand, thereby improving the reliability of the mud and sand screening device in mud and sand screening.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the first vibration component and the second vibration component, the first screen can vibrate and screen the mud and sand in a large amplitude and low frequency manner, and the second screen can vibrate and screen the mud and sand in a low amplitude and high frequency manner, thereby improving the screening effect of mud and sand with different particle sizes; 2. By setting the first swing assembly and the second swing assembly, the screening time of mud and sand on the first screen and the second screen is prolonged, and the screening effect of mud and sand is improved; 3. By setting up the first flushing component and the second flushing component, the mud and sand on the first screen and the second screen can be flushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the first screen and the second screen; Figure 3 It is a structural schematic diagram of a first vibration component, a first swing component and a first flushing component; Figure 4 It is a schematic diagram of the structure of the vibrating impeller; Figure 5 It is a schematic diagram of the structure of the swing part, the fixing part and the release part; Figure 6 It is a structural schematic diagram of the reversing unit; Figure 7 It is a schematic diagram of the structure of the third synchronous pulley, the fourth synchronous pulley and the second synchronous drive belt.

[0030] Description of reference numerals: 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 row of sand holes; 3. Second screen; 31. Second connecting column; 32. Second frame; 33. Second row of sand holes; 4. First vibration assembly; 41. Vibration box; 42. Vibration shaft; 4 3. Vibrating impeller; 44. Vibrating turntable; 45. Vibrating rod; 46. Vibrating water inlet pipe; 47. Vibrating water outlet pipe; 48. Regulating valve; 5. Second vibrating assembly; 6. First swing assembly; 61. Swinging part; 611. Swinging box; 612. Swinging shaft; 613. Swinging impeller; 614. Forward water inlet pipe; 6141. First ball valve; 615. Reverse water inlet pipe; 6151. Second ball valve; 616. Swinging outlet water pipe; 62, fixing part; 621, fixing plate; 6211, fixing groove; 622, fixing slide rod; 623, fixing spring; 63, releasing part; 631, releasing box; 632, releasing shaft; 633, releasing impeller; 634, first releasing gear; 635, second releasing gear; 636, releasing plate; 6361, releasing block; 637, releasing rod; 638, releasing water inlet pipe; 639, releasing 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 swinging 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 DESCRIPTION

[0031] The following is combined with Figure 1-7 This application is described in further detail.

[0032] The present application embodiment discloses a mud and sand screening device for water conservancy projects. Figure 1 and Figure 2 A mud and sand screening device for water conservancy projects includes a screening box 1, a first screen 2, a second screen 3, a first vibration component 4 and a second vibration component 5.

[0033] Reference Figure 2 The screening box 1 is vertically arranged, and the top end is connected with a feed pipe 16. The first screen 2 is located in the screening box 1, and is hinged with a first connecting column 21, the first connecting column 21 is connected to the side wall of the screening box 1, and the hinge between 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 swings relative to the first connecting column 21 to vibrate the mud and sand on the first screen 2.

[0034] The second screen 3 is located in the screening box 1 and below the first screen 2. The second screen 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 screen 3 is higher than that of the first screen 2. The hinge between the second screen 3 and the second connecting column 31 is located on the side wall of the second connecting column 31. The second screen 3 swings relative to the second connecting column 31 to vibrate the mud and sand on the second screen 3. The first screen 2 and the second screen 3 form two-stage screening for the mud and sand.

[0035] The first vibration component 4 is arranged on the first screen 2, and the second vibration component 5 is arranged on the second screen 3. The second vibration component 5 has the same structure as the first vibration component 4. The present application takes the first vibration component 4 as an example for detailed description.

[0036] Reference Figure 3 and Figure 4 The first vibration component 4 includes a vibration box 41, a vibration shaft 42, a vibration impeller 43, a vibration turntable 44 and a vibration rod 45.

[0037] The vibration box 41 is in a circular box shape and is fixedly connected to one side of the first screen 2. The side of the vibration box 41 away from the first screen 2 is in an open shape. The vibration shaft 42 is rotatably connected in the vibration box 41 and is coaxially arranged with the vibration box 41. The vibration impeller 43 is sleeved on the vibration shaft 42 and is fixedly connected to the vibration shaft 42. The vibration turntable 44 is adapted to the opening side of the vibration box 41, and the sealing cover of the vibration turntable 44 is arranged on the opening side of the vibration box 41, and the vibration turntable 44 is fixedly connected to the vibration shaft 42. One end of the vibration rod 45 is rotatably connected to the vibration turntable 44, and the other end is hinged on 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, and the swinging vibration rod 45 drives the first screen 2 to swing relative to the first connecting column 21 through the vibration turntable 44 and the vibration box 41 with the first connecting column 21 as the support object, so that the first screen 2 vibrates to screen mud and sand.

[0038] In order to facilitate driving the vibration impeller 43 to rotate, the vibration box 41 is connected with a vibration water inlet pipe 46 and a vibration water outlet pipe 47. The connecting position of the vibration water inlet pipe 46 and the vibration box 41 is opposite to the blades of the vibration impeller 43. The vibration water inlet pipe 46 is used to introduce pressurized water into the vibration box 41, and the vibration water outlet pipe 47 is used to discharge the water in the vibration box 41 so that the water can flow out of the vibration box 41. The vibration water inlet pipe 46 is provided with a regulating valve 48. The regulating valve 48 can adjust the flow rate of the water in the vibration water inlet pipe 46 to control the rotation speed of the vibration impeller 43.

[0039] In particular, refer to Figure 3The rotational connection position between the vibration rod 45 of the first vibration component 4 and the vibration turntable 44 of the first vibration component 4 is arranged close to the edge of the vibration turntable 44, so that the vibration amplitude of the first screen 2 driven by the vibration rod 45 is larger, so that the first screen 2 can vibrate the mud and sand with a large amplitude; the rotational connection position between the vibration rod 45 of the second vibration component 5 and the vibration turntable 44 of the second vibration component 5 is arranged close to the center of the vibration turntable 44, so that the vibration amplitude of the second screen 3 driven by the vibration rod 45 is smaller, so that the second screen 3 can vibrate the mud and sand with a small amplitude.

[0040] When grading and screening mud and sand, the mud and sand are loaded into the screening box 1, and the mud and sand first fall onto the first screen 2, and the first screen 2 performs primary screening on the mud and sand. The screened material of the first screen 2 falls onto the second screen 3, and the second screen 3 performs secondary screening on the mud and sand, so that the mud and sand can be graded and screened according to particle size to meet the requirements of different projects for mud and sand particle size.

[0041] The vibrating water inlet pipe 46 supplies pressurized water to 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 component 4 can drive the first screen 2 to vibrate, and because the rotation connection position of the vibrating rod 45 and the vibrating turntable 44 is set close to the edge position of the vibrating turntable 44, the vibration amplitude of the first screen 2 is large, so that the first screen 2 can vibrate the mud and sand with a large amplitude; the vibrating rod 45 of the second vibrating component 5 can drive the second screen 3 to vibrate, and because the rotation connection position of the vibrating rod 45 and the vibrating turntable 44 is set close to the center position of the vibrating turntable 44, the vibration amplitude of the second screen 3 is small, so that the second screen 3 can vibrate the mud and sand with a small amplitude.

[0042] The flow rate of the water flow in the vibrating water inlet pipe 46 is controlled by adjusting the valve 48, so that the water flow can regulate the driving speed of the vibrating impeller 43, thereby allowing the speed of the vibrating impeller 43 to be adaptively adjusted; the regulating valve 48 of the first vibrating component 4 is adjusted to slow down the flow rate of the water flow in the vibrating water inlet pipe 46, so that the vibrating impeller 43 of the first vibrating component 4 rotates slowly, thereby allowing the first screen 2 to vibrate the mud and sand at a low frequency; the regulating valve 48 of the second vibrating component 5 is adjusted to speed up the flow rate of the water flow in the vibrating water inlet pipe 46, so that the vibrating impeller 43 of the second vibrating component 5 rotates quickly, thereby allowing the second screen 3 to vibrate the mud and sand at a high frequency.

[0043] By controlling the rotational connection position between the vibration rod 45 and the vibration turntable 44 and the flow rate of the water in the vibration water inlet pipe 46, the first screen 2 can screen mud and sand with a large amplitude and low frequency, and the second screen 3 can screen mud and sand with a small amplitude and high frequency, thereby improving the screening effect of mud and sand of different particle sizes and enabling accurate classification of mud and sand.

[0044] Reference Figure 2 and Figure 3 In order to prevent mud and sand from falling from the sides on the first screen 2 and the second screen 3, a first frame 22 is fixedly connected to the first screen 2, and a first sand row hole 23 is opened at the bottom of the first frame 22 away from the first connecting column 21. The first sand row hole 23 discharges mud and sand on the first screen 2 into the first material receiving port 14 connected to the side wall of the screening box 1; a second frame 32 is fixedly connected to the second screen 3, and a second sand row hole 33 is opened at the bottom of the second frame 32 away from the second connecting column 31. The second sand row hole 33 discharges mud and sand on the second screen 3 into the second material receiving port 15 connected to the side wall of the screening box 1.

[0045] The first frame 22 limits the mud and sand on the first screen 2 from falling from the side of the first screen 2, and the first frame 22 guides the mud and sand on the first screen 2 to be discharged from the first sand discharge hole 23 to the first material receiving port 14, so that the first screen 2 has a stable and reliable screening effect on the mud and sand; the second frame 32 limits the mud and sand on the second screen 3 from falling from the side of the second screen 3, and the second frame 32 guides the mud and sand on the second screen 3 to be discharged from the second sand discharge hole 33 to the second material receiving port 15, so that the second screen 3 has a stable and reliable screening effect on the mud and sand, thereby improving the reliability of the mud and sand screening device for mud and sand screening.

[0046] Reference Figure 3 In order to prolong the screening time of mud and sand 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. This application takes the first swinging assembly 6 as an example for detailed description.

[0047] Reference Figure 2 The first connecting column 21 and the second connecting column 31 are respectively arranged close to the two side walls facing the screening box 1, and are both rotatably connected to the screening box 1.

[0048] Reference Figure 5 The first swing assembly 6 includes a swing part 61 , and the swing part 61 includes a swing box 611 , a swing shaft 612 and a swing impeller 613 .

[0049] The swing box 611 is fixedly connected to the screening box 1. The swing shaft 612 is rotatably arranged on 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 in 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, and the first screen 2 prolongs the screening time of mud and sand in the process of swinging around the rotation axis of the first connecting column 21.

[0050] Reference Figure 5 and Figure 6 In order to facilitate driving the swing impeller 613 to rotate forward and reversely so that the first screen 2 can swing back and forth up and down around the rotation axis of the first connecting column 21, the swing box 611 is connected with a forward water inlet pipe 614, a reverse water inlet pipe 615 and a swing outlet pipe 616. 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 connection between the forward water inlet pipe 614 and the swing box 611 is directly opposite to the blades of the swing impeller 613. The connection between the reverse water inlet pipe 615 and the swing box 611 is directly opposite to the blades of the swing impeller 613. The connection between the swing 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. The connection between the swing outlet pipe 616 and the swing box 611 is located between the forward water inlet pipe 614 and the reverse water inlet pipe 615.

[0051] Reference Figure 5 The forward water inlet pipe 614 and the reverse water inlet pipe 615 are both used to introduce pressurized water into the swing box 611. The forward water inlet pipe 614 is provided with a first ball valve 6141, and the reverse water inlet pipe 615 is provided with a second ball valve 6151. The swing water outlet pipe 616 is used to discharge 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.

[0052] Reference 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 into the swing box 611, so that the first screen 2 can swing from a downward tilt to an upward tilt 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 into the swing box 611, so that the first screen 2 can swing from an upward tilt to a downward tilt 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 direction of the swing impeller 613 can be controlled.

[0053] The first ball valve 6141 is opened and the second ball valve 6151 is closed, so that the pressurized water flows from the forward water inlet pipe 614 into the swing box 611, and the pressurized water flows on the blades of the swing impeller 613 to drive the swing impeller 613 to rotate forward, and 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; the second ball valve 6151 is opened and the first ball valve 6141 is closed, so that the pressurized water flows from the reverse water inlet pipe 615 into the swing box 6 11, the pressurized water flow impacts the blades of the swing impeller 613 to drive the swing impeller 613 to reverse, and 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; thereby, by adjusting the switches of the first ball valve 6141 and the second ball valve 6151, the first screen 2 can swing back and forth up and down around the rotation axis of the first connecting column 21, thereby extending the screening time of mud and sand on the first screen 2 and improving the screening effect of mud and sand.

[0054] Reference Figure 5 In order to further extend the screening time of mud and sand on the first screen 2 so that the first connecting column 21 can rotate intermittently, the first swing assembly 6 also includes a fixing part 62 and a releasing part 63. The fixing part 62 is connected to the first connecting column 21 and the screening box 1 respectively. 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 to the first connecting column 21. After the fixing of the fixing part 62 to the first connecting column 21 is released, the first connecting column 21 can be rotated 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.

[0055] Since the release portion 63 can intermittently release the fixation of the fixing portion 62 to the first connecting column 21, and after the first connecting column 21 is released and rotated to a fixed angle, the fixing portion 62 can re-fix the first connecting column 21, so that the first connecting column 21 can be intermittently rotated, thereby allowing the first screen 2 to intermittently swing around the rotation axis of the first connecting column 21, thereby extending the time for the first screen 2 to swing from an upward tilt to a downward tilt around the rotation axis of the first connecting column 21.

[0056] Specifically, refer to Figure 5 The fixing portion 62 includes a fixing plate 621 , a fixing slide rod 622 and a fixing spring 623 .

[0057] The fixed plate 621 is fixedly connected to the end of the first connecting column 21, and a plurality of fixed grooves 6211 are circumferentially provided on the side wall of the fixed plate 621. The fixed slide bar 622 is slidably connected to the screening box 1, and the sliding direction is the direction of approaching or moving away from the fixed plate 621. The fixed spring 623 is fixedly arranged between the fixed slide bar 622 and the screening box 1, and is used to drive the end of the fixed slide bar 622 to be inserted into any one of the fixed grooves 6211.

[0058] The end of the fixing slide bar 622 is inserted into the fixing groove 6211 so that the fixing plate 621 can be fixed relative to the screening box 1, so that the first connecting column 21 can be fixed to the screening box 1 by relying on the fixing slide bar 622; when an external force drives the end of the fixing slide bar 622 to slide out of the fixing groove 6211, the rotation state of the first connecting column 21 can be quickly restored; when the first connecting column 21 rotates, the external force driving the fixing slide bar 622 is canceled, and under the elastic force of the fixing spring 623, the end of the fixing slide bar 622 can abut against the side wall of the fixing plate 621 until the next fixing groove 6211 rotates to the position of the fixing slide bar 622, and the fixing slide bar 622 can be reinserted into the fixing groove 6211 under the elastic force of the fixing spring 623 to fix the fixing plate 621 to the screening box 1 again, so that the first connecting column 21 is easy to fix, and it is easy to automatically re-fix after releasing the fixation.

[0059] Specifically, refer to Figure 5 and Figure 6 The release portion 63 includes a release box 631 , a release shaft 632 , a release impeller 633 , a first release gear 634 , a second release gear 635 , a release disk 636 and a release lever 637 .

[0060] Reference Figure 5 The release box 631 is fixedly connected to the screening box 1. The release shaft 632 is rotatably arranged on the release box 631. The release impeller 633 is located in the release box 631 and is sleeved on the release shaft 632. The release impeller 633 is fixedly connected to the release shaft 632.

[0061] Reference Figure 5 and Figure 6 The first release gear 634 is located outside the release box 631 and is fixedly connected to the release shaft 632. The first release gear 634 is an incomplete gear. The second release gear 635 is rotatably connected to the screening box 1, and the second release gear 635 is intermittently meshed with the first release gear 634. The first release gear 634 can intermittently drive the second release gear 635 to rotate.

[0062] Reference Figure 6The release plate 636 is fixedly connected to the second release gear 635, and a plurality of release blocks 6361 are evenly connected along the circumferential direction on the side wall of the release plate 636. The release rod 637 is fixedly connected to the fixed slide bar 622. When the release rod 637 is moved, the end of the fixed slide bar 622 can be driven to escape from the fixed groove 6211.

[0063] Reference Figure 5 In order to facilitate the driving of the release impeller 633 to rotate, the release box 631 is connected with a release water inlet pipe 638 and a release water outlet pipe 639. The connection between the release water inlet pipe 638 and the release box 631 is directly 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.

[0064] In particular, refer to Figure 5 The release block 6361 is used to move the release rod 637 during the rotation of the release disk 636. When the release block 6361 passes the release rod 637, the release rod 637 drives the end of the fixed slide rod 622 to completely escape from the fixed groove 6211.

[0065] The pressurized water flow in the release water inlet pipe 638 can impact on the blades of the release impeller 633, and 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, and the second release gear 635 intermittently drives the release disk 636 to rotate. The release disk 636 intermittently drives all the release blocks 6361 to rotate, and all the release blocks 6361 sequentially drive the release rod 637 to move. When the release block 6361 pushes over the release rod 637, the release rod 637 drives the end of the fixed slide bar 622 to completely disengage from the fixed groove 6211, so that the fixed slide bar 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 disk 621 can be intermittently released.

[0066] Reference Figure 6 In order to realize automatic switching of the opening and closing states of the first ball valve 6141 and the second ball valve 6151 while releasing the fixing slide rod 622 from fixing the fixed disk 621, the first ball valve 6141 and the second ball valve 6151 are commonly connected with a reversing part 64, and the fixing part 62 and the releasing part 63 are both located on the side of the first connecting column 21 close to the swing box 611.

[0067] The reversing portion 64 includes a first synchronous pulley 641 , a second synchronous pulley 642 , a first synchronous driving belt 643 , a cross reversing frame 644 and a reversing lever 645 .

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Reference Figure 2In 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 facing 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 facing the second connecting column 31. The first washing component 8 and the second washing component 9 have the same structure. This application takes the first washing component 8 as an example for detailed description.

[0073] Reference Figure 3 The first flushing component 8 includes a flushing water pipe 81 and a flushing nozzle 82.

[0074] Reference Figure 2 and Figure 3 The flushing water pipe 81 is in a circular tubular shape and is connected to the side wall of the screening box 1. A plurality of flushing nozzles 82 are provided and are all connected to the flushing water pipe 81. The plurality of flushing nozzles 82 are arranged along the axial direction of the flushing water pipe 81, and the flushing nozzles 82 face the first screen 2. A flushing water inlet pipe 83 is connected to one end of the flushing water pipe 81, and the flushing water inlet pipe 83 is used to introduce pressurized water into the flushing water pipe 81.

[0075] The flushing water inlet pipe 83 flows pressurized water into the flushing water pipe 81, and the pressurized water is sprayed from the flushing nozzle 82 onto the first screen 2. The water sprayed from the flushing nozzle 82 can flush the mud and sand on the first screen 2 to remove the mud in the mud and sand. At the same time, the water flow can dredge the mesh of the first screen 2, so that the first screen 2 is not easily blocked.

[0076] Further, refer to Figure 2 , Figure 3 and Figure 7 The flushing water pipe 81 is rotatably connected to the screening box 1 and to the flushing water inlet pipe 83. The end of the flushing water pipe 81 away from the flushing water inlet pipe 83 is fixedly connected to the third synchronous pulley 84, and the end of the first connecting column 21 close to the third synchronous pulley 84 is fixedly connected to the fourth synchronous pulley 85. The third synchronous pulley 84 and the fourth synchronous pulley 85 are jointly wound with a second synchronous drive belt 86. When the first screen 2 is tilted upward, the water flow sprayed by the flushing nozzle 82 impacts the position of the first screen 2 close to the first connecting column 21.

[0077] Through the third synchronous pulley 84, the fourth synchronous pulley 85 and the second synchronous drive belt 86, the first connecting column 21 can drive the flushing water pipe 81 to rotate synchronously when rotating, so that the direction of the water flow sprayed by 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 flow sprayed by the flushing nozzle 82 can fully flush the first screen 2; because when the first screen 2 tilts upward, the water flow sprayed by the flushing nozzle 82 impacts the position of the first screen 2 close to the first connecting column 21, so that when the first screen 2 tilts downward, the water flow sprayed by the flushing nozzle 82 can impact the position of the first screen 2 away from the first connecting column 21, so that in the process of the first screen 2 gradually swinging downward around the rotation axis of the first connecting column 21, the injection point of the water flow sprayed by the flushing nozzle 82 on the first screen 2 can gradually move away from the first connecting column 21, so that the water flow sprayed by the flushing nozzle 82 can hinder the discharge of mud and sand on the first screen 2, thereby extending the screening time of mud and sand on the first screen 2.

[0078] Reference Figure 2 In order to make efficient use of water in the mud and sand screening device, a water tank 11 is fixedly connected to one side of the screening box 1. The water tank 11 is located in the screening box 1 and is used to hold 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 component 4, the first swing component 6 and the first flushing component 8. The second water pump 13 is used to supply water to the second vibration component 5, the second swing component 7 and the second flushing component 9, and the water supply pipeline of the first water pump 12 is the same as the water supply pipeline of the second water pump 13.

[0079] Reference 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, and the swing water outlet pipe 616 is connected to the water tank 11.

[0080] The first water pump 12 conveys water under pressure to 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 to be used as water for mud and sand flushing. The water flow in the release box 631 can flow into the swing box 611 after driving the release impeller 633 to continue driving 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, thereby realizing efficient use of water in the mud and sand screening device.

[0081] The implementation principle of a mud and sand screening device for a water conservancy project in an embodiment of the present application is as follows: when in use, mud and sand are loaded into a screening box 1, a first vibration component 4 drives a first screen 2 for vibration screening, a second vibration component 5 drives a second screen 3 for vibration screening, a first swing component 6 drives the first screen 2 to swing back and forth around the rotation axis of a first connecting column 21, a second swing component 7 drives the second screen 3 to swing back and forth around the rotation axis of a second connecting column 31, a first flushing component 8 swings and flushes the mud and sand on the first screen 2, and a second flushing component 9 swings and flushes the mud and sand on the second screen 3, thereby improving the screening effect of mud and sand of different particle sizes and enabling accurate classification of the mud and sand.

[0082] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mud and sand screening device for water conservancy projects, characterized in that: include: Screening box (1); A first screen (2) is located in the screening box (1) and is hingedly connected to a first connecting column (21), wherein the first connecting column (21) is connected to a side wall of the screening box (1); The second screen (3) is located in the screening box (1) and below the first screen (2). The second screen (3) is hinged with a second connecting column (31). The second connecting column (31) is connected to the side wall of the screening box (1). The screening accuracy of the second screen (3) is higher than the screening accuracy of the first screen (2). A first vibration assembly (4) is arranged on the first screen (2); A second vibration component (5) is arranged on the second screen (3) and has the same structure as the first vibration component (4); in, The first vibration component (4) comprises: A vibration box (41) connected to one side of the first screen (2), and having an opening on a side away from the first screen (2); A vibration shaft (42) is rotatably connected in the vibration box (41); A vibration impeller (43) sleeved on the vibration shaft (42); A vibration turntable (44), a sealing cover is arranged on the opening side of the vibration box (41) and is connected to the vibration shaft (42); A vibration rod (45), one end of which is rotatably connected to the vibration turntable (44), and the other end of which is hinged to the first connection column (21); The vibration box (41) is connected with a vibration water inlet pipe (46) and a vibration water outlet pipe (47). The communication position between 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 into the vibration box (41). The vibration water outlet pipe (47) is used to discharge water in the vibration box (41). The vibration water inlet pipe (46) is provided with a regulating valve (48); The rotational connection position between the vibration rod (45) of the first vibration component (4) and the vibration turntable (44) of the first vibration component (4) is arranged close to the edge of the vibration turntable (44); and the rotational connection position between the vibration rod (45) of the second vibration component (5) and the vibration turntable (44) of the second vibration component (5) is arranged close to the center of the vibration turntable (44).

2. A mud and sand screening device for water conservancy projects according to claim 1, characterized in that: The first connecting column (21) and the second connecting column (31) are respectively arranged near two side walls directly facing the screening box (1), and are both rotatably connected to the screening box (1); a first swinging assembly (6) is arranged at one end of the first connecting column (21), and a second swinging assembly (7) is arranged at one end of the second connecting column (31); the first swinging assembly (6) and the second swinging assembly (7) have the same structure; The first swing assembly (6) comprises a swing part (61), and the swing part (61) comprises a swing box (611), a swing shaft (612) and a swing impeller (613); The swing box (611) is connected to the screening box (1); the swing shaft (612) is rotatably arranged on the swing box (611) and connected to the end of the first connecting column (21); the swing impeller (613) is located in the swing box (611) and sleeved on the swing shaft (612); The swing box (611) is connected with a forward water inlet pipe (614), a reverse water inlet pipe (615) and a swing water outlet pipe (616); 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 connection point between the forward water inlet pipe (614) and the swing box (611) is directly opposite to the blades of the swing impeller (613); and the connection point between the reverse water inlet pipe (615) and the swing box (611) is directly opposite to the blades of the swing impeller (613); The forward water inlet pipe (614) and the reverse water inlet pipe (615) are both used to introduce pressurized water into the swing box (611); a first ball valve (6141) is provided on the forward water inlet pipe (614); a second ball valve (6151) is provided on the reverse water inlet pipe (615); and the swing water outlet pipe (616) is used to discharge water in the swing box (611); 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 a downward tilt to an upward tilt; 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 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 (6) further comprises a fixing portion (62) and a releasing portion (63), wherein the fixing portion (62) is connected to the first connecting column (21) and the screening box (1) respectively, the fixing portion (62) being used to fix the first connecting column (21) relative to the screening box (1), and the releasing portion (63) being connected to the screening box (1) and being used to intermittently release the fixing of the fixing portion (62) to the first connecting column (21), after the fixing of the first connecting column (21) by the fixing portion (62) is released, the first connecting column (21) can be rotated by a fixed angle, and after the first connecting column (21) is rotated by a fixed angle, the fixing portion (62) fixes the first connecting column (21) relative to the screening box (1) again.

4. A mud and sand screening device for water conservancy projects according to claim 3, characterized in that: The fixing portion (62) includes a fixing plate (621), a fixing slide bar (622) and a fixing spring (623); the fixing plate (621) is connected to the end of the first connecting column (21); a plurality of fixing grooves (6211) are circumferentially provided on the side wall of the fixing plate (621); the fixing slide bar (622) is slidably connected to the screening box (1); the fixing spring (623) is arranged between the fixing slide bar (622) and the screening box (1) and is used to drive the end of the fixing slide bar (622) to be inserted into any one of the fixing grooves (6211).

5. A mud and sand screening device for water conservancy projects according to claim 4, characterized in that: The release unit (63) comprises: A release box (631) is connected to the screening box (1); A release shaft (632) is rotatably mounted on the release box (631); A release impeller (633) is located in the release box (631) and sleeved on the release shaft (632); A first release gear (634) is located outside the release box (631) and connected to the release shaft (632). The first release gear (634) is an incomplete gear; A second release gear (635) is rotatably connected to the screening box (1), and the second release gear (635) is intermittently meshed with the first release gear (634); A release plate (636) is connected to the second release gear (635), and a plurality of release blocks (6361) are evenly connected to the side wall of the release plate (636) along the circumferential direction; A release rod (637) connected to the fixed slide rod (622); The release box (631) is connected with a release water inlet pipe (638) and a release water outlet pipe (639); the connection point between the release water inlet pipe (638) and the release box (631) is directly opposite to the blades of the release impeller (633); the release water inlet pipe (638) is used to introduce pressurized water into the release box (631); and the release water outlet pipe (639) is used to discharge water in the release box (631); The release block (6361) is used to move the release rod (637) during the rotation of the release disk (636). When the release block (6361) moves past the release rod (637), the release rod (637) drives the end of the fixed slide rod (622) to completely escape from the fixed groove (6211).

6. A mud and sand screening device for water conservancy projects according to claim 5, characterized in that: The fixing part (62) and the releasing part (63) are both located on a side of the first connecting column (21) close to the swing box (611); the first ball valve (6141) and the second ball valve (6151) are commonly connected with a reversing part (64); the reversing part (64) comprises a first synchronous pulley (641), a second synchronous pulley (642), a first synchronous driving belt (643), a cross reversing frame (644) and a reversing lever (645); The first synchronous pulley (641) is connected to the valve stem of the first ball valve (6141), the second synchronous pulley (642) is connected to the valve stem of the second ball valve (6151), the first synchronous driving belt (643) is wound around the first synchronous pulley (641) and the second synchronous pulley (642), and 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 central part of the cross reversing frame (644) is connected to the valve stem of the second ball valve (6151), the reversing lever (645) is connected to the release disk (636), and the reversing lever (645) is used to drive the cross reversing frame (644) to rotate in the process of rotating with the release disk (636); After the release block (6361) drives the end of the fixed slide rod (622) to completely escape from the fixed groove (6211), the reversing lever (645) just drives the cross reversing frame (644) to rotate 90 degrees.

7. The mud and sand screening device for water conservancy projects according to claim 5, characterized in that: The screening box (1) is provided with a first flushing assembly (8) and a second flushing assembly (9); the first flushing assembly (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) facing the first connecting column (21); the second flushing assembly (9) is located on a 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) facing the second connecting column (31); the first flushing assembly (8) and the second flushing assembly (9) have the same structure; The first flushing assembly (8) comprises a flushing water pipe (81) and a flushing nozzle (82). The flushing water pipe (81) is connected to the side wall of the screening box (1). A plurality of flushing nozzles (82) are provided and are all connected to the flushing water pipe (81). The flushing nozzles (82) face the first screen (2). One end of the flushing water pipe (81) is connected to a flushing water inlet pipe (83). The flushing water inlet pipe (83) is used to introduce pressurized water into the flushing water pipe (81).

8. The mud and sand screening device for water conservancy projects according to claim 7, characterized in that: The flushing water pipe (81) is rotatably connected to the screening box (1) and is rotatably connected to the flushing water inlet pipe (83); one end of the flushing water pipe (81) away from the flushing water inlet pipe (83) is connected to a third synchronous pulley (84); one end of the first connecting column (21) close to the third synchronous pulley (84) is connected to 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); when the first screen (2) is tilted upward, the water flow sprayed by the flushing nozzle (82) impacts the first screen (2) at a position close to the first connecting column (21).

9. The mud and sand screening device for water conservancy engineering according to claim 7, characterized in that: A water tank (11) is provided on one side of the screening box (1). The water tank (11) is used to hold 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 component (4), the first swing component (6) and the first flushing component (8). The second water pump (13) is used to supply water to the second vibration component (5), the second swing component (7) and the second flushing component (9). The water supply pipeline of the first water pump (12) is the same as the water supply pipeline of the second water pump (13). 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), and the swing water outlet pipe (616) is connected to the water tank (11).

10. The mud and sand screening device for water conservancy engineering according to claim 1, characterized in that: The first screen (2) is connected to a first frame (22), and a first sand discharge hole (23) is provided at the bottom of the first frame (22) on a side away from the first connecting column (21), and the first sand discharge hole (23) discharges mud and sand on the first screen (2) into a first material receiving port (14) connected to the side wall of the screening box (1); The second screen (3) is connected to a second frame (32), and a second sand row hole (33) is provided at the bottom of the second frame (32) on a side away from the second connecting column (31). The second sand row hole (33) discharges mud and sand on the second screen (3) into a second material receiving port (15) connected to the side wall of the screening box (1).

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