CN210546252U

CN210546252U - Sieving mechanism for hydraulic engineering

Info

Publication number: CN210546252U
Application number: CN201921023941.1U
Authority: CN
Inventors: 叶家兴; 李世红; 冯秋菊
Original assignee: Guangdong Gaofeng Construction Engineering Co ltd
Current assignee: Guangdong Gaofeng Construction Engineering Co ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-05-19
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a sieving mechanism for hydraulic engineering belongs to hydraulic engineering technical field, including conveyor components, screening subassembly and broken subassembly, conveyor components sets up the side at the screening subassembly, conveyor components's discharge end corresponds the setting with the feed end of screening subassembly, the screening subassembly is including screening case, first screening piece, second screening piece and dust removal piece, first screening piece sets up the top at the screening case, second screening piece sets up at the screening incasement, second screening piece and screening case sliding fit, dust removal piece sets up at the screening incasement, broken subassembly sets up the side at the screening case, the feed end of broken subassembly is corresponding with first screening piece. The utility model discloses a conveying motor rotates and drives to carry the auger to rotate and upwards carry the grit of feeding incasement, carries the grit to first screening spare through ejection of compact funnel on, can realize the automatic feeding of grit, has improved work efficiency.

Description

Sieving mechanism for hydraulic engineering

Technical Field

The utility model belongs to the technical field of the hydraulic engineering technique and specifically relates to a sieving mechanism for hydraulic engineering is related to.

Background

The water conservancy project is a project constructed for controlling and allocating surface water and underground water in the nature to achieve the purposes of removing harm and benefiting. Also known as water engineering. Water is a valuable resource essential for human production and life, but its naturally occurring state does not completely meet the needs of human beings. Only when hydraulic engineering is built, water flow can be controlled, flood disasters are prevented, and water quantity is adjusted and distributed to meet the requirements of people on water resources in life and production. Hydraulic engineering needs to build various types of hydraulic buildings such as dams, dikes, spillways, water gates, water inlets, channels, transition troughs, rafts, fishways and the like so as to achieve the aims.

The utility model discloses a utility model with publication number CN207997337U relates to a sieving mechanism for hydraulic engineering, which comprises a shell, a stirring cavity, a primary sieving cavity, a first rotating shaft and a fan, wherein the stirring cavity is arranged at the upper part of the inner cavity of the shell, and the upper part of the left side of the stirring cavity is connected with a feeding port; a second motor is arranged on the left side above the shell, a first rotating shaft is fixedly connected to the output end of the lower portion of the second motor, a first rotating wheel is sleeved at the upper end of the first rotating shaft, and a packing auger is fixedly installed at the lower end of the first rotating shaft; a fan is installed on the left side of the second motor, a second rotating wheel is arranged on the left side of the first rotating wheel, and the inner wall of the second rotating wheel is fixedly connected with a second rotating shaft; a first screen is arranged at the lower part of the stirring cavity, and a primary screening cavity is arranged at the lower part of the first screen; a second screen is arranged at the lower part of the primary screening cavity; the utility model discloses a practice thrift a large amount of manpowers and material resources, can be efficient carry out multistage screening to the grit of hydraulic engineering construction usefulness, made things convenient for the constructor, also can realize carrying out abundant utilization to the resource.

However, the above-mentioned devices also have the following problems in use: firstly, when screening the grit, the bold grit can not be handled, leads to the waste of resource, and the second can not carry out automatic feeding, needs artifical material loading in production, leads to production efficiency low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sieving mechanism for hydraulic engineering to bulky grit can not handle among the solution prior art, leads to the waste of resource and needs artifical material loading in the production, technical problem that production efficiency is low.

The utility model provides a sieving mechanism for hydraulic engineering, including conveyor components, screening subassembly and broken subassembly, conveyor components sets up the side at the screening subassembly, conveyor components's discharge end corresponds the setting with the feed end of screening subassembly, the screening subassembly is including screening case, first screening piece, second screening piece and dust removal piece, the screening case is vertical setting, first screening piece sets up the top at the screening case, second screening piece sets up at the screening incasement, second screening piece and screening case sliding fit, dust removal piece sets up at the screening incasement, the output of dust removal piece sets up towards second screening piece, broken subassembly sets up the side at the screening case, broken subassembly's feed end is corresponding with first screening piece.

Further, the conveying assembly comprises a conveying motor, a conveying auger and a conveying box, the conveying box is vertically arranged, the conveying motor is arranged at the top of the conveying box, the conveying auger is arranged in the conveying box and fixedly connected with an output shaft of the conveying motor, a feeding box is arranged at the bottom of the conveying box and communicated with the conveying box, and a discharging funnel is arranged at the top of the conveying box.

Further, the first screening part comprises a screening frame, a driving motor, a first rotating rod, a second rotating rod, a connecting block, four supporting rods and four connecting plates, wherein the four supporting rods are arranged at the top of the screening box in a rectangular manner, the four connecting plates are arranged on the side wall of the screening frame in a rectangular manner, each connecting plate is provided with a vibration spring at the bottom, each vibration spring is arranged at the bottom of the corresponding supporting rod, the connecting block is arranged at the bottom of the screening frame, the driving motor is arranged at the top of the screening box, the first rotating rod is arranged on an output shaft of the driving motor, one end of the second rotating rod is arranged on the first rotating rod and is rotatably connected with the first rotating rod, the other end of the second rotating rod is arranged on the connecting block and is rotatably connected with the connecting block, and a dust collecting box is arranged at the bottom of the screening frame, the dust collection box is provided with a conveying pipe communicated with the dust collection box, the conveying pipe extends into the screening box, the side wall of the screening frame is provided with an opening and closing door, and a discharge plate is arranged below the opening and closing door.

Further, the second screening piece is including rotating motor, running gear, two screening boards and a plurality of connecting piece, two screening board symmetry set up on the screening case and with screening case sliding fit, two all be equipped with the rack on the one end lateral wall of screening board, every the other end of screening board is connected with the lateral wall of screening case through a plurality of connecting pieces, the running gear sets up on the lateral wall of screening case, the running gear sets up on the output shaft of rotating the motor, running gear and two racks meshing.

Further, every the connecting piece all includes fixed plate, expanding spring and telescopic link, the fixed plate sets up on the lateral wall of screening board, expanding spring's both ends set up respectively on the lateral wall of fixed plate and screening case, the telescopic link sets up on expanding spring, the both ends of telescopic link set up respectively on the lateral wall of fixed plate and screening case.

Further, the piece that removes dust all includes four connecting pipes, every the connecting pipe all through the lateral wall fixed connection of ferrule and screening case, every all be equipped with the inlet tube rather than being linked together on the connecting pipe, every all be equipped with a plurality of equidistant distribution's fog nozzle on the connecting pipe, every the fog nozzle all is linked together rather than the connecting pipe that corresponds, every the fog nozzle all sets up towards two screening boards.

Further, broken subassembly includes mounting bracket, broken case, broken motor, two live-rollers and a plurality of broken blade, the mounting bracket is the side of vertical setting at the screening case, broken case sets up at the top of mounting bracket, two the live-rollers set up in broken incasement and with broken case normal running fit, and is a plurality of broken blade is the circumference setting on two live-rollers, two one of live-rollers serves and all is equipped with first belt pulley, broken motor sets up on the mounting bracket, be equipped with the second belt pulley on broken motor's the output shaft, first belt pulley and two second belt pulleys pass through the belt and connect, the top of broken case is equipped with the stock guide that communicates mutually with broken case, be equipped with the discharge door on the broken case.

Compared with the prior art, the beneficial effects of the utility model reside in that:

one of the two, the utility model discloses pass through the stock guide at bold grit and carry to broken incasement back, broken motor rotates and drives the second belt pulley and rotate, and the second belt pulley passes through the belt and drives two first belt pulleys and rotate, and two first belt pulleys rotate and drive two live-rollers and rotate, and two live-rollers rotate and drive a plurality of broken blades and carry out broken operation to bold grit, carry out broken back at bold grit, are favorable to the recycling to bold grit, can not cause the waste of production.

Two, the utility model discloses when carrying out defeated material, the conveyor motor rotates and drives and carries the auger to rotate and upwards carry the grit in the feeding case, carries the grit to first screening spare through ejection of compact funnel on, can realize the automatic feeding of grit, has improved work efficiency.

And thirdly, the utility model discloses when well two screening plates filter, a large amount of dust influence environment can appear, and water is through four inlet tubes entering four connecting pipes, and four connecting pipes atomize water through a plurality of fog nozzles, and when two screening plates screened the grit, a large amount of water smoke of spun carried out the dust fall to the dust and handled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a top view of the present invention;

3 FIG. 33 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 A 3- 3 A 3 of 3 FIG. 32 3; 3

Fig. 4 is a schematic view of a partial three-dimensional structure of the present invention;

fig. 5 is a schematic perspective view of the crushing assembly of the present invention;

fig. 6 is a schematic diagram of a partial three-dimensional structure of the present invention.

Reference numerals:

the device comprises a conveying assembly 1, a conveying motor 11, a conveying auger 12, a conveying box 13, a feeding box 14, a discharging hopper 15, a screening assembly 2, a screening box 21, a first screening part 22, a screening frame 221, an opening and closing door 2211, a discharging plate 2212, a driving motor 222, a first rotating rod 223, a second rotating rod 224, a connecting block 225, a supporting rod 226, a connecting plate 227, a vibrating spring 228, a dust collection box 229, a conveying pipe 2291, a second screening part 23, a rotating motor 231, a rotating gear 232, a screening plate 233, a tooth row 2331, a connecting part 234, a fixing plate 2341, an expansion spring 2342, an expansion rod 2343, a dust removal part 24, a connecting pipe 241, a water inlet pipe 242, an atomizing nozzle 243, a crushing assembly 3, a mounting frame 31, a crushing box 32, a crushing motor 33, a rotating roller 34, a crushing blade 35, a first belt pulley 36, a second belt pulley 37 and a guide.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring now to fig. 1 to 6, the embodiment of the present invention provides a screening device for hydraulic engineering, which comprises a conveying assembly 1, a screening assembly 2 and a crushing assembly 3, the conveying component 1 is arranged at the side of the screening component 2, the discharge end of the conveying component 1 is arranged corresponding to the feed end of the screening component 2, the screening assembly 2 comprises a screening box 21, a first screening element 22, a second screening element 23 and a dusting element 24, the screening box 21 is vertically arranged, the first screening part 22 is arranged at the top of the screening box 21, the second screening element 23 is arranged in the screening box 21, the second screening element 23 is in sliding fit with the screening box 21, the dust-removing element 24 is arranged in the screening box 21, the output end of the dust-removing element 24 is arranged towards the second screening element 23, the crushing assembly 3 is arranged beside the screening box 21, and the feeding end of the crushing assembly 3 corresponds to the first screening element 22; when screening, carry the grit to first screening 22 through conveyor assembly 1 on, first screening 22 carries out the work of preliminary screening to the grit, pass through crushing subassembly 3 with the grit of macroparticles after the screening and to its breakage after throwing into hydraulic engineering construction, the grit removes to second screening 23 after first screening 22 filters on, second screening 23 carries out more detailed screening work to the grit, at the in-process that second screening 23 screened, dust removal 24 works and carries out the dust fall to the dust that the screening produced and handle.

Specifically, the conveying assembly 1 comprises a conveying motor 11, a conveying auger 12 and a conveying box 13, the conveying box 13 is vertically arranged, the conveying motor 11 is arranged at the top of the conveying box 13, the conveying auger 12 is arranged in the conveying box 13 and is fixedly connected with an output shaft of the conveying motor 11, a feeding box 14 is arranged at the bottom of the conveying box 13, the feeding box 14 is communicated with the conveying box 13, and a discharging hopper 15 is arranged at the top of the conveying box 13; when material is conveyed, the conveying motor 11 rotates to drive the conveying auger 12 to rotate so as to convey the sandstone in the feeding box 14 upwards, and the sandstone is conveyed to the first screening part 22 through the discharging hopper 15.

Specifically, first screening piece 22 includes screening frame 221, driving motor 222, first rotation pole 223, second rotation pole 224, connecting block 225, four bracing pieces 226 and four connecting plates 227, four bracing pieces 226 are the rectangle and set up at the top of screening case 21, four connecting plates 227 are the rectangle and set up on the lateral wall of screening frame 221, every the bottom of connecting plate 227 all is equipped with vibrations spring 228, every the top at the bracing piece 226 that corresponds rather than the bottom of vibrations spring 228 is all installed, connecting block 225 sets up the bottom at screening frame 221, driving motor 222 sets up the top at screening case 21, first rotation pole 223 sets up on driving motor 222's output shaft, the one end setting of second rotation pole 224 is on first rotation pole 223 and is connected with first rotation pole 223 rotation, the other end setting of second rotation pole 224 is on connecting block 225 and is connected with connecting block 225 rotation, the bottom of the screening frame 221 is provided with a dust collection box 229, the dust collection box 229 is provided with a delivery pipe 2291 communicated with the dust collection box 229, the delivery pipe 2291 extends into the screening box 21, the side wall of the screening frame 221 is provided with an opening and closing door 2211, and a discharge plate 2212 is arranged below the opening and closing door 2211; when screening, driving motor 222 rotates and drives first dwang 223 and rotate, first dwang 223 rotates and drives second dwang 224 and rotate, second dwang 224 rotates and drives connecting block 225 and removes, connecting block 225 removes and drives screening frame 221 and trembles on four vibrations spring 228 through four connecting plates 227, filter the fine grit in the grit, the fine grit falls into in dust collection box 229 and carries to screening box 21 in through conveyer pipe 2291, after the screening, in bold grit broken case 32 when passing through play flitch 2212 and removing.

Specifically, the second screening element 23 includes a rotating motor 231, a rotating gear 232, two screening plates 233 and a plurality of connecting members 234, the two screening plates 233 are symmetrically disposed on the screening box 21 and are in sliding fit with the screening box 21, a tooth row 2331 is disposed on a side wall of one end of each of the two screening plates 233, the other end of each of the screening plates 233 is connected with a side wall of the screening box 21 through the plurality of connecting members 234, the rotating motor 231 is disposed on the side wall of the screening box 21, the rotating gear 232 is disposed on an output shaft of the rotating motor 231, and the rotating gear 232 is engaged with the two tooth rows 2331; after the gravel is conveyed into the screening box 21, the rotating motor 231 rotates to drive the rotating gear 232 to rotate, the rotating gear 232 rotates to drive the two gear rows 2331 to move, the two gear rows 2331 move to drive the two screening plates 233 to move, and the two screening plates 233 move to screen the gravel.

Specifically, each of the connecting members 234 includes a fixing plate 2341, an extension spring 2342 and an extension rod 2343, the fixing plate 2341 is disposed on the side wall of the screening plate 233, two ends of the extension spring 2342 are respectively disposed on the fixing plate 2341 and the side wall of the screening box 21, the extension rod 2343 is disposed on the extension spring 2342, and two ends of the extension rod 2343 are respectively disposed on the fixing plate 2341 and the side wall of the screening box 21; two screening boards 233 drive expanding spring 2342 and telescopic link 2343 through fixed plate 2341 and remove when screening, carry out the screening operation to the grit on two screening boards 233.

Specifically, each dust removing member 24 includes four connecting pipes 241, each connecting pipe 241 is fixedly connected with the side wall of the screening box 21 through a pipe hoop, each connecting pipe 241 is provided with a water inlet pipe 242 communicated with the connecting pipe, each connecting pipe 241 is provided with a plurality of spray nozzles 243 distributed at equal intervals, each spray nozzle 243 is communicated with the corresponding connecting pipe 241, and each spray nozzle 243 is arranged towards two screening plates 233; when two screening boards 233 were screened, a large amount of dust influence environment can appear, and water gets into four connecting pipes 241 through four inlet tubes 242, and four connecting pipes 241 atomize water through a plurality of fog nozzles 243, and when two screening boards 233 screened the grit, a large amount of water smoke of spun carried out the dust fall to the dust and handled.

Specifically, the crushing assembly 3 comprises an installation frame 31, a crushing box 32, a crushing motor 33, two rotating rollers 34 and a plurality of crushing blades 35, the installation frame 31 is vertically arranged at the side of the screening box 21, the crushing box 32 is arranged at the top of the installation frame 31, the two rotating rollers 34 are arranged in the crushing box 32 and are in running fit with the crushing box 32, the crushing blades 35 are circumferentially arranged on the two rotating rollers 34, one end of each of the two rotating rollers 34 is provided with a first belt pulley 36, the crushing motor 33 is arranged on the installation frame 31, an output shaft of the crushing motor 33 is provided with a second belt pulley 37, the first belt pulley 36 and the two second belt pulleys 37 are connected through a belt, the top of the crushing box 32 is provided with a guide plate 38 communicated with the crushing box 32, and the crushing box 32 is provided with a discharge door; after in the broken case 32 of conveying through stock guide 38 at bold grit, crushing motor 33 rotates and drives second belt pulley 37 and rotate, second belt pulley 37 passes through the belt and drives two first belt pulleys 36 and rotate, two first belt pulleys 36 rotate and drive two live-rollers 34 and rotate, two live-rollers 34 rotate and drive a plurality of broken blades 35 and carry out broken operation to bold grit, carry out broken back at bold grit, be favorable to the recycling to bold grit, remove out broken grit through ejection of compact door after the breakage.

The working principle is as follows: when the utility model is used, when transporting materials, the transportation motor 11 rotates to drive the transportation auger 12 to rotate to transport the gravels in the feeding box 14 upwards, the gravels are transported to the screening frame 221 through the discharging hopper 15, the driving motor 222 rotates to drive the first rotation rod 223 to rotate, the first rotation rod 223 rotates to drive the second rotation rod 224 to rotate, the second rotation rod 224 rotates to drive the connecting block 225 to move, the connecting block 225 moves to drive the screening frame 221 to shake on four vibration springs 228 through four connecting plates 227, screening is performed to the fine gravels in the gravels, the fine gravels fall into the dust collection box 229 and are transported into the screening box 21 through the transporting pipe 2291, after screening, the massive gravels move through the discharging plate 2212 in the crushing box 32, after the gravels are transported into the screening box 21, the rotation motor 231 rotates to drive the rotation gear 232 to rotate, the rotation gear 232 drives the two tooth rows 2331 to move, the two tooth rows 2331 move to drive the two screening plates 233 to move, the two screening plates 233 move to screen gravels, the two screening plates 233 drive the telescopic springs 2342 and the telescopic rods 2343 to move through the fixing plates 2341 when screening is performed on the two screening plates 233, the gravels on the two screening plates 233 are screened, a large amount of dust affecting the environment can be generated when the two screening plates 233 are screened, water enters the four connecting pipes 241 through the four water inlet pipes 242, the four connecting pipes 241 atomize the water through the spray nozzles 243, when the two screening plates 233 screen the gravels, the dust is reduced by the sprayed large amount of water mist, after the large gravels are conveyed into the crushing box 32 through the guide plate 38, the crushing motor 33 rotates to drive the second belt pulley 37 to rotate, the second belt pulley 37 drives the two first belt pulleys 36 to rotate through a belt, the two first belt pulleys 36 rotate to drive the two rotating rollers 34 to rotate, two live-rollers 34 rotate and drive a plurality of broken blades 35 and carry out broken operation to bold grit, carry out broken back at bold grit, are favorable to recycling of bold grit, move out broken grit through the discharge gate after the breakage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A screening device for hydraulic engineering is characterized by comprising a conveying assembly (1), a screening assembly (2) and a crushing assembly (3), wherein the conveying assembly (1) is arranged beside the screening assembly (2), the discharge end of the conveying assembly (1) is arranged corresponding to the feed end of the screening assembly (2), the screening assembly (2) comprises a screening box (21), a first screening part (22), a second screening part (23) and a dust removing part (24), the screening box (21) is vertically arranged, the first screening part (22) is arranged at the top of the screening box (21), the second screening part (23) is arranged in the screening box (21), the second screening part (23) is in sliding fit with the screening box (21), the dust removing part (24) is arranged in the screening box (21), and the output end of the dust removing part (24) faces the second screening part (23), the crushing assembly (3) is arranged at the side of the screening box (21), and the feeding end of the crushing assembly (3) corresponds to the first screening piece (22).

2. The screening device for hydraulic engineering according to claim 1, wherein: conveying component (1) is including carrying motor (11), carrying auger (12) and transport case (13), carry the vertical setting of case (13), carry motor (11) to set up the top at transport case (13), carry auger (12) to set up in transport case (13) and with the output shaft fixed connection of carrying motor (11), the bottom of transport case (13) is equipped with feeding case (14), feeding case (14) are linked together with transport case (13), the top of carrying case (13) is equipped with ejection of compact funnel (15).

3. The screening device for hydraulic engineering according to claim 1, wherein: first screening piece (22) includes screening frame (221), driving motor (222), first dwang (223), second dwang (224), connecting block (225), four bracing pieces (226) and four connecting plates (227), four bracing pieces (226) are the rectangle and set up at the top of screening case (21), four connecting plate (227) are the rectangle and set up on the lateral wall of screening frame (221), every the bottom of connecting plate (227) all is equipped with vibrations spring (228), every the top at bracing piece (226) rather than corresponding is all installed to the bottom of vibrations spring (228), connecting block (225) set up the bottom at screening frame (221), driving motor (222) set up the top at screening case (21), first dwang (223) set up on the output shaft of driving motor (222), the one end of second dwang (224) sets up on first dwang (223) and rotates with first dwang (223) and is connected, the other end setting of second dwang (224) is on connecting block (225) and with connecting block (225) rotation connection, the bottom of screening frame (221) is equipped with dust collection box (229), be equipped with conveyer pipe (2291) rather than being linked together on dust collection box (229), in extending to screening box (21) of conveyer pipe (2291), be equipped with door (2211) that opens and shuts on the lateral wall of screening frame (221), the below of door (2211) that opens and shuts is equipped with out flitch (2212).

4. The screening device for hydraulic engineering according to claim 1, wherein: second screening piece (23) are including rotating motor (231), rotating gear (232), two screening boards (233) and a plurality of connecting piece (234), two screening board (233) symmetry set up on screening case (21) and with screening case (21) sliding fit, two all be equipped with on the one end lateral wall of screening board (233) tooth row (2331), every the other end of screening board (233) is connected with the lateral wall of screening case (21) through a plurality of connecting piece (234), rotating motor (231) set up on the lateral wall of screening case (21), rotating gear (232) set up on the output shaft of rotating motor (231), rotating gear (232) and two tooth row (2331) meshing.

5. The screening device for hydraulic engineering according to claim 4, wherein: every connecting piece (234) all include fixed plate (2341), expanding spring (2342) and telescopic link (2343), fixed plate (2341) sets up on the lateral wall of screening board (233), the both ends of expanding spring (2342) set up respectively on the lateral wall of fixed plate (2341) and screening case (21), telescopic link (2343) set up on expanding spring (2342), the both ends of telescopic link (2343) set up respectively on the lateral wall of fixed plate (2341) and screening case (21).

6. The screening device for hydraulic engineering according to claim 3, wherein: dust removal spare (24) all include four connecting pipes (241), every connecting pipe (241) all through the lateral wall fixed connection of ferrule and screening case (21), every all be equipped with inlet tube (242) rather than being linked together on connecting pipe (241), every all be equipped with a plurality of equidistant distribution's fog nozzle (243) on connecting pipe (241), every fog nozzle (243) all are linked together rather than corresponding connecting pipe (241), every fog nozzle (243) all set up towards two screening boards (233).

7. The screening device for hydraulic engineering according to claim 1, wherein: the crushing assembly (3) comprises a mounting frame (31), a crushing box (32), a crushing motor (33), two rotating rollers (34) and a plurality of crushing blades (35), the mounting frame (31) is vertically arranged at the side of the screening box (21), the crushing box (32) is arranged at the top of the mounting frame (31), the two rotating rollers (34) are arranged in the crushing box (32) and are in running fit with the crushing box (32), the crushing blades (35) are circumferentially arranged on the two rotating rollers (34), one ends of the two rotating rollers (34) are respectively provided with a first belt pulley (36), the crushing motor (33) is arranged on the mounting frame (31), an output shaft of the crushing motor (33) is provided with a second belt pulley (37), the first belt pulley (36) is connected with the two second belt pulleys (37) through a belt, the top of the crushing box (32) is provided with a guide plate (38) communicated with the crushing box (32), and a discharge door is arranged on the crushing box (32).