CN111561004A

CN111561004A - Hydraulic engineering desilting device

Info

Publication number: CN111561004A
Application number: CN202010466431.2A
Authority: CN
Inventors: 杜林豪
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-21

Abstract

The hydraulic engineering dredging device effectively solves the problems that the operation is complex and secondary pollution is easy to generate during dredging of the river channel; the dredging box is internally and partially provided with a first cavity, a second cavity, a third cavity and a fourth cavity, the dredging box is provided with a mud inlet positioned at the front end of the third cavity, a first filter screen is arranged between the first cavity and the third cavity, the side edge of the first cavity is connected with a water pumping pipeline, the second cavity is connected with the filter-pressing box, the rear end of the fourth cavity is provided with a second filter screen, the mud outlet end of the filter-pressing box is connected with the ship body, the bottom of the filter-pressing box is provided with a water outlet, and the power box controls the operation of the first separating mechanism and the second separating mechanism and the advancing of equipment; the invention has smart structure, the split structure can adapt to various different construction environments, the carrying of river water is reduced during dredging, the dredging cost is reduced, and the dredging efficiency is improved.

Description

Hydraulic engineering desilting device

Technical Field

This device relates to hydraulic engineering equipment technical field, especially relates to a hydraulic engineering desilting device.

Background

As is known, the bottom of a river channel, a pond or a water tank can deposit a lot of dirt needing to be cleaned after the river channel, the pond or the water tank is used for a period of time, and the dirt needs to be cleaned in time after the river channel, the pond or the water tank is used for a period of time. Especially, the normal operation of hydraulic engineering can be influenced to the filth that deposits in hydraulic engineering, needs regularly to clear up. The existing cleaning methods are generally two types: one is dry dredging, the river channel is segmented and coffered, then the accumulated water in the river pool in the cofferdam range is drained by a water pump, and then the dredging is carried out by adopting an excavator or manually excavating along two banks of the river channel according to the site conditions of a construction site. The dredging method has the advantages of thorough dredging, easy control of dredging depth, high sludge concentration, low transportation cost and relatively low total engineering cost, but has obvious defects, and because cofferdam drainage is needed, the method has certain influence on the safety of slope protection at both banks, construction can also cause certain damage to the established engineering at both banks, and meanwhile, because of cutoff of a river channel, the method is not beneficial to the construction of some river channels. The second type is semi-dry dredging, which is similar to the dry dredging, but is not limited to completely emptying water and discharging the water to a sufficient stirring depth, then flushing and damaging the sludge by using a high-pressure water gun, pumping the sludge to a sludge centralized treatment area by using a slurry pump, and treating the sludge which cannot be flushed by using an excavator or a manual excavation mode. The dredging method can also thoroughly finish dredging, is simple and convenient to operate, has the same defect of strong limitation as dry dredging, and is not suitable for river channel construction which is not suitable for cutting off. The third is wet mechanical dredging, without cofferdam drainage, dredging construction is carried out by a dredging machine under water environment, the common machines comprise an amphibious backhoe type dredging machine, a small chain bucket type dredging boat, a small cutter suction type dredging machine, a small suction cup type dredging boat, a jet type dredging boat, a pneumatic chestnut type dredging machine and the like, the adaptability of the dredging machines to the environment exceeds that of dry dredging or semi-dry dredging, but secondary pollution generated in the dredging process is not easy to control, so that the dredging is not thorough, and a mud discharge pipeline needs to be laid to influence the navigation of a river channel.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a hydraulic engineering dredging device, which effectively solves the problems of complex operation and easy generation of secondary pollution during river dredging.

The technical scheme for solving the technical problem is as follows: a dredging device for hydraulic engineering comprises a ship body and a dredging box, wherein a power box and a filter-pressing box are fixedly connected to the side edge of the dredging box, the front ends of the dredging box and the power box are arranged in parallel and provided with sharp edges, the interior of the dredging box is divided into an upper cavity and a lower cavity through a partition plate, a first separating mechanism is arranged in the upper cavity and divides the upper cavity into a first cavity and a second cavity which are always in a separating state, a second separating mechanism is arranged in the lower cavity and divides the lower cavity into a third cavity and a fourth cavity which are always in a separating state, a sludge inlet at the front end of the third cavity is formed in the dredging box, a first filter screen is mounted on the partition plate between the first cavity and the third cavity, a water pumping pipeline is connected to the side edge of the first cavity, the second cavity is connected with the filter-pressing box, and a second filter screen is arranged at the rear end of the fourth cavity, the mud outlet end of the filter-pressing box is connected with the ship body, a water outlet is formed in the bottom of the filter-pressing box, and the power box controls the operation of the first separating mechanism and the second separating mechanism and the advancing of equipment.

Preferably, a sludge bin communicated with the filter-pressing box is arranged in the ship body.

Preferably, the internal cylindrical recess that is equipped with of epicoele, first partition mechanism arranges the recess in, first partition mechanism sets up the pivot in the upper chamber body including rotating, pivot axis direction is perpendicular with desilting case advancing direction, the equipartition has four baffles outside the pivot, baffle outer end and recess wall sliding contact, the headstock is connected in the pivot, the pivot is rotated and is driven the baffle and rotate, the baffle can be with in the second cavity is carried to first cavity silt, be in the partition state between first cavity and the second cavity all the time when the baffle rotates.

Preferably, the second separating mechanism comprises a first flexible board and a second flexible board which are arranged in the lower cavity, the first flexible board and the second flexible board are arranged in parallel and are provided with buffer cavities, the first flexible board and the second flexible board are controlled by a driving mechanism in the power box, the first flexible board and the second flexible board are always separated between the third cavity and the fourth cavity, a structure which is always in a separating state between the third cavity and the fourth cavity is formed, and sundries in the third cavity can enter the fourth cavity through the buffer cavities.

Preferably, a motor is arranged in the power box, and the motor is connected with the rotating shaft after being decelerated.

Preferably, the motor output shaft on be fixed with the gear, the gear has cup jointed the ring gear, the ring gear inboard is equipped with the rack with gear engagement, set up two annular spacing grooves on the desilting case outer wall, be equipped with the locating lever that inserts the spacing inslot on the ring gear, the motor rotates and drives the ring gear and move at the spacing inslot, first flexbile plate and second flexbile plate all are equipped with the driving lever that stretches out the desilting case outside, the driving frame has cup jointed driving frame outward, driving frame and ring gear swing joint, the ring gear drives driving frame horizontal migration, be equipped with the electric putter that is used for fixed driving lever on the driving frame, constitute the structure that driving frame control driving lever drove first flexbile plate and second flexbile plate and remove.

Preferably, the desilting case below be equipped with the groove of stepping down, the inslot of stepping down can be arranged in to first flexonics board and second flexonics board, the groove of stepping down divide into two parts, the inslot that steps down is equipped with the sensor, the sensor is connected with electric putter electricity.

Preferably, the filter-pressing box in be equipped with the filter-pressing mechanism, the filter-pressing mechanism includes two first filter cloths and the second filter cloth that form the closed loop, is equipped with first compression roller in the first filter cloth closed loop, is equipped with a plurality of second compression rollers that are located the compression roller outside in the second filter cloth closed loop, first compression roller is the active driving spare, second compression roller and first filter cloth and second filter cloth contact and produce the extrusion effect when first compression roller rotates.

Preferably, the second filter cloth forms a sludge inlet, the tail ends of the first filter cloth and the second filter cloth form a sludge outlet, and the filter press box is provided with a scraper at the sludge outlet.

The invention has smart structure, the split structure can adapt to various different construction environments, the carrying of river water is reduced during dredging, the dredging cost is reduced, and the dredging efficiency is improved.

Drawings

Fig. 1 is a schematic side view of the present invention.

Fig. 2 is a schematic front view of the present invention.

Fig. 3 is a side cross-sectional schematic view of the present invention.

Fig. 4 is an enlarged view of portion a of fig. 3 according to the present invention.

FIG. 5 is a schematic view of the present invention with the power box housing removed.

Fig. 6 is an enlarged view of the portion B of fig. 5 (with the pumping duct removed) according to the present invention.

FIG. 7 is a schematic view of the structure of the dredging tank of the present invention.

Fig. 8 is an enlarged view of the portion C of fig. 7 according to the present invention.

Fig. 9 is a schematic view of the internal structure of the filter press box of the present invention.

Fig. 10 is a schematic structural view of a driving block in the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As can be seen from fig. 1 to 10, a dredging device for hydraulic engineering comprises a ship body 1 and a dredging box 2, wherein the dredging box 2 is brought into the water body through the ship body 1 and is placed in the water body through equipment carried by the ship body 1, a carrying device and a throwing device are both in the prior art, details are not described, the side edge of the dredging box 2 is fixedly connected with a power box 3 and a filter pressing box 4, the front ends of the dredging box 2 and the power box 3 are parallel and provided with a sharp edge 5, when the dredging box 2 advances, the sharp edge 5 squeezes away sludge so as to enable the sludge to enter the dredging box 2, the inside of the dredging box 2 is divided into an upper cavity and a lower cavity through a partition plate, a first partition mechanism is arranged in the upper cavity and divides the upper cavity into a first cavity 6 and a second cavity 7, the first cavity 6 and the second cavity 7 are always in a partition state, a second partition mechanism is arranged in the lower cavity and divides the lower cavity into a third cavity 8 and a fourth cavity 9, the third cavity 8 and the fourth cavity 9 are always in a separated state, a sludge inlet 10 positioned at the front end of the third cavity 8 is arranged on the dredging box 2, a first filter screen 11 is arranged on a partition plate between the first cavity 6 and the third cavity 8, the side edge of the first cavity 6 is connected with a water pumping pipeline 12, the second cavity 7 is connected with a filter-pressing box 4, a second filter screen 13 is arranged at the rear end of the fourth cavity 9, the sludge outlet end of the filter-pressing box 4 is connected with the ship body 1, a water outlet 14 is arranged at the bottom of the filter-pressing box 4, the power box 3 controls the operation of the first separating mechanism and the second separating mechanism and the advancing of equipment, the power box 3 drives the equipment to advance, sludge enters the third cavity 8 from the sludge inlet 10, the sludge in the first cavity 6 can be pumped into the first cavity 6 due to the existence of the water pumping pipeline 12 and the second separating mechanism in the first cavity 6, and solid pollutants such as stones, branches and the like in the sludge can be filtered when passing through the first filter screen 11, these solid pollutants can enter into fourth cavity 9 through second partition mechanism and collect, the muddy water that solid pollutants contains can be discharged in the river course from second filter screen 13, only collect solid pollutants, under the effect of pipeline 12 that draws water, the moisture mud that gets into in the first cavity 6, partly water in the mud is pumped to the pipeline 12 that draws water, and discharge into the river course, mud passes through the effect of first partition mechanism, enter into in the second cavity 7, get into in the pressure filter case 4 from the second cavity 7 and carry out the filter-pressing, wherein moisture discharges into the river course through delivery port 14, dry mud is in the silt storehouse 15 of hull 1 through the mud pipe suction.

The internal cylindrical recess 16 that is equipped with of epicoele, first partition mechanism arranges in recess 16, first partition mechanism sets up the pivot 17 in the cavity at the epicoele including rotating, pivot 17 axis direction is perpendicular and level with 2 advancing direction of desilting case, the equipartition has four baffles 18 outside the

pivot

17, 18 outer ends of baffle and 16 wall sliding contact of recess, headstock 3 is connected to pivot 17, pivot 17 rotates and drives baffle 18 and rotate, it has two baffles 18 and recess 16 to contact all the time between first cavity 6 and the second cavity 7, baffle 18 rotates and can carry the second cavity 7 with silt in the first cavity 6 from the space of 18 pieces of baffle in, be in the partition state all the time between first cavity 6 and the second cavity 7 when baffle 18 rotates.

The second separating mechanism comprises a first flexible board 19 and a second flexible board 20 which are arranged in a lower cavity, the first flexible board 19 and the second flexible board 20 are arranged in parallel and are provided with a buffer cavity 21, the first flexible board 19 and the second flexible board 20 are controlled by a driving mechanism in the power box 3, the first flexible board 19 and the second flexible board 20 are always separated between the third cavity 8 and the fourth cavity 9, a structure which is always in a separating state between the third cavity 8 and the fourth cavity 9 is formed, sundries in the third cavity 8 can enter the fourth cavity 9 through the buffer cavity 21, and when solid pollutants pass through, the first flexible board 19 and the second flexible board 20 can not interfere with the movement of the solid pollutants, so that the solid pollutants smoothly enter the fourth cavity 9 for collection.

The power box 3 is provided with a motor 22, the motor 22 is connected with the rotating shaft 17 after being decelerated to provide power for the first separating mechanism, and is further provided with a power device for driving the equipment to advance, the power device comprises a roller and other equipment (not shown in the figure), and the devices are all conventional technical means in the field and are not described more herein.

A gear 23 is fixed on an output shaft of the motor 22, a gear ring 24 is sleeved outside the gear 23, a rack meshed with the gear 23 is arranged on the inner side of the gear ring 24, two annular limiting grooves 25 are formed in the outer wall of the dredging box 2, a positioning rod 26 inserted into the limiting grooves 25 is arranged on the gear ring 24, the gear ring 24 is driven by the motor 22 to move in the limiting grooves 25, the gear 23 is always meshed with the gear ring 24 in the moving process, a deflector rod 27 extending out of the dredging box 2 is arranged on each of the first flexible plate 19 and the second flexible plate 20, a driving frame 28 is sleeved outside the deflector rod 27, a connecting rod extends out of the driving frame 28, a sleeve ring sleeved outside the connecting rod is arranged on the gear ring 24, the driving frame 28 is movably connected with the gear ring 24, the gear ring 24 drives the driving frame 28 to move horizontally, an electric push rod 29 for fixing the deflector rod 27 is arranged on the driving frame 28, the electric push rod 29 controls the connection of the driving frame 28 and the deflector rod 27, so that the first flexible plate 19 and, the second separating mechanism is used for conveying solid pollutants and separating the third cavity 8 and the fourth cavity 9.

2 below of desilting case be equipped with the groove of stepping down 30, the groove of stepping down 30 can be arranged in to first flexbile plate 19 and second flexbile plate 20, the groove of stepping down 30 divide into two parts, hold first flexbile plate 19 and second flexbile plate 20 respectively, all be equipped with sensor 31 in the groove of stepping down 30 of each part, when first flexbile plate 19 and second flexbile plate 20 are located cavity third 8 and fourth cavity 9 down in the separation, driving lever 27 triggers sensor 31, sensor 31 is connected with electric putter 29 electricity, sensor 31 is triggered the back and gives electric putter 29 with the signal transmission, electric putter 29 makes the reaction according to the signal, thereby control drive frame 28 and driving lever 27 be connected or break off, and then conveniently control first flexbile plate 19 or second flexbile plate 20.

Filter-pressing case 4 in be equipped with the filter-pressing mechanism, the filter-pressing mechanism includes two first filter cloth 32 and the second filter cloth 33 that form the closed loop, be equipped with first compression roller 34 in the first filter cloth 32 closed loop, be equipped with in the closed loop of second filter cloth 33 and be located a plurality of second compression rollers 35 of compression roller outside, first filter cloth 32 and second filter cloth 33 pass between first compression roller 34 and the second compression roller 35, wrap up the silt in area between first filter cloth 32 and the second filter cloth 33 under the pressure effect of first compression roller 34 and second compression roller 35, the moisture that contains is extruded from the filter cloth, discharge the river course from below delivery port 14, in the silt storehouse 15 in the hull 1 is sucked from mud outlet end to the dry mud, first compression roller 34 is the initiative driving piece, drive first filter cloth 32 and the transmission of second filter cloth 33.

The second filter cloth 33 form a sludge inlet 36, the sludge inlet 36 is located below a connecting port of the second cavity 7 and the filter-pressing box 4, sludge in the second cavity 7 enters the second filter cloth 33, the first filter cloth 32 and the second filter cloth 33 are overlapped and then wrapped with the sludge, a sludge outlet 37 is formed at the tail ends of the first filter cloth 32 and the second filter cloth 33, the filter-pressing box 4 is provided with a scraper 38 at the sludge outlet 37, the sludge outlet 37 is located above a sludge outlet, the scraper 38 scrapes dry sludge on the first filter cloth 32 and the second filter cloth 33, and the dry sludge is conveyed into the sludge bin 15 of the ship body 1 from a sludge conveying pipe.

The joint of the water pumping pipeline 12 and the first cavity 6 is provided with filter cloth to prevent sludge from returning to the river channel through the water pumping pipeline 12, the sludge outlet end of the filter-pressing box 4 is connected with the hull 1 through a sludge conveying pipe, and the water pumping pipeline 12 and the sludge conveying pipe are both provided with power elements which are conventional technical means in the field and are not described herein.

When the second separating mechanism is controlled, the first flexible plate 19 and the second flexible plate 20 move alternately, when the first flexible plate 19 is blocked between the third cavity 8 and the fourth cavity 9, the poking rod 27 triggers the sensor 31, the sensor 31 transmits a signal to the electric push rod 29, the electric push rod 29 controls the driving frame 28 to be fixedly connected with the poking rod 27 of the second flexible plate 20, the second flexible plate 20 is in a moving state, the second flexible plate 20 retracts towards the yielding groove 30 first, when the second flexible plate retracts to the limit position, the positioning rod 26 of the gear ring 24 is positioned at the inflection point of the limiting groove 25, the inflection point of the limiting groove 25 is provided with a step, the gear ring 24 can only move in one direction, the gear ring 24 and the gear 23 are ensured to be always in the meshing position, the positioning rod 26 returns from the inflection point, the gear ring 24 moves reversely, the second flexible plate 20 extends out of the yielding groove 30, when the second flexible plate 20 is blocked between the third cavity 8 and the fourth cavity 9, the shifting rod 27 triggers the sensor 31, the sensor 31 transmits a signal to the electric push rod 29, the electric push rod 29 controls the driving frame 28 to be fixedly connected with the shifting rod 27 of the first flexible board 19, the connection with the second flexible board 20 is released, the first flexible board 19 starts to move, and the second flexible board 20 is in a fixed position.

When the electric push rod 29 controls the driving frame 28 to be connected with the shift lever 27, the end part of the telescopic rod of the electric push rod 29 is provided with a clamping block, the clamping block is in contact with the shift lever 27 after the electric push rod 29 extends to form fixed connection, and the shift lever 27 moves in the driving frame 28 without being influenced after the electric push rod 29 retracts.

When the invention is used, the water-saving agent is added,

the boat body 1 is used for carrying the dredging box 2 to enter a dredging river channel, the dredging box 2 is lowered into the river channel, the driving device in the power box 3 is started to drive equipment to advance, sludge at the bottom of the river channel enters the dredging box 2 from the sludge inlet 10, the sludge enters the fourth cavity 9 through the second separating mechanism for collection due to the fact that the sludge between the first cavity 6 and the second cavity 7 and between the third cavity 8 and the fourth cavity 9 are always in a separated state under the action of the water pumping pipeline 12, the sludge is pumped into the first cavity 6, solid pollutants contained in the sludge enter the fourth cavity 9 through the filtering action of the first filter screen 11, water in the sludge entering the first cavity 6 is played back into the river channel under the action of the water pumping pipeline 12, the sludge containing less water enters the second cavity 7 through the first separating mechanism and enters the filter pressing box 4 for filter pressing, dry sludge and water are separated after filter pressing, and water are discharged back into the river channel, and dry mud is carried the silt storehouse 15 in the hull 1 through defeated mud pipe and is stored, shifts after collecting a certain amount, at the in-process of desilting, collects solid contaminant in the fourth cavity 9, and dry mud is collected in the silt storehouse 15, and moisture is arranged back to the river course in, and a large amount of power and the energy that need when reducing the transfer river are extravagant, reduce the storage space, promote the desilting ability.

Compared with the prior art, the invention has the following beneficial effects:

1. the separated structure of the ship body 1 and the dredging box 2 is adopted, the environment is not limited, sludge in a river channel can be cleaned to the maximum extent, and the structure is suitable for various different construction environments;

2. a large-scale mud conveying pipe is not required to be laid, so that the investment cost is reduced;

3. the dredging box 2 is only used for collecting sludge during dredging, the sludge is treated in a post-process, the water body is not stirred, and the secondary pollution of the water body is avoided;

4. water in the sludge is extruded, and only the sludge is collected, so that the investment of a storage space is reduced, and the transportation capacity is improved;

5. can separate and collect the solid pollutant contained in the sludge, avoid the damage of the sludge to the filter pressing equipment and improve the dredging efficiency.

Claims

1. The dredging device for the water conservancy project is characterized by comprising a ship body (1) and a dredging box (2), wherein the side edge of the dredging box (2) is fixedly connected with a power box (3) and a filter-pressing box (4), the front ends of the dredging box (2) and the power box (3) are parallel and are provided with sharp edges (5), the inside of the dredging box (2) is divided into an upper cavity and a lower cavity through a partition plate, a first separating mechanism is arranged in the upper cavity, the upper cavity is divided into a first cavity (6) and a second cavity (7) by the first separating mechanism, the first cavity (6) and the second cavity (7) are always in a separating state, a second separating mechanism is arranged in the lower cavity, the lower cavity is divided into a third cavity (8) and a fourth cavity (9) by the second separating mechanism, the third cavity (8) and the fourth cavity (9) are always in a separating state, a sludge inlet (10) positioned at the front end of the third cavity (8) is arranged on the dredging box (2), install first filter screen (11) on the baffle between first cavity (6) and third cavity (8), draw water pipeline (12) are connected to first cavity (6) side, filter-pressing case (4) is connected in second cavity (7), fourth cavity (9) rear end is equipped with second filter screen (13), filter-pressing case (4) play mud end connects hull (1), filter-pressing case (4) bottom is equipped with delivery port (14), the operation of first partition mechanism and second partition mechanism and the marcing of equipment are controlled in headstock (3).

2. The hydraulic engineering dredging device according to claim 1, wherein a silt bin (15) communicated with the filter-pressing box (4) is arranged in the hull (1).

3. The hydraulic engineering dredging device according to claim 1, wherein a cylindrical groove (16) is formed in the upper cavity, the first separating mechanism is arranged in the groove (16) and comprises a rotating shaft (17) rotatably arranged in the upper cavity, the axis direction of the rotating shaft (17) is perpendicular to the advancing direction of the dredging box (2), four baffles (18) are uniformly distributed outside the rotating shaft (17), the outer ends of the baffles (18) are in sliding contact with the wall of the groove (16), the rotating shaft (17) is connected with the power box (3), the rotating shaft (17) rotates to drive the baffles (18) to rotate, the baffles (18) can convey sludge in the first cavity (6) to the second cavity (7), and the first cavity (6) and the second cavity (7) are always in a separating state when the baffles (18) rotate.

4. The hydraulic engineering dredging device according to claim 1, wherein the second partition mechanism comprises a first flexible plate (19) and a second flexible plate (20) which are arranged in the lower cavity, the first flexible plate (19) and the second flexible plate (20) are arranged in parallel and are provided with a buffer cavity (21), the first flexible plate (19) and the second flexible plate (20) are controlled by a driving mechanism in the power box (3), the first flexible plate (19) and the second flexible plate (20) are always isolated between the third cavity (8) and the fourth cavity (9), a structure that the third cavity (8) and the fourth cavity (9) are always in a partition state is formed, and sundries in the third cavity (8) can enter the fourth cavity (9) through the buffer cavity (21).

5. The hydraulic engineering dredging device according to claim 1, wherein a motor (22) is arranged in the power box (3), and the motor (22) is connected with the rotating shaft (17) after being decelerated.

6. The hydraulic engineering dredging device according to claim 1, wherein a gear (23) is fixed on an output shaft of the motor (22), a gear ring (24) is sleeved outside the gear (23), a rack meshed with the gear (23) is arranged on the inner side of the gear ring (24), two annular limiting grooves (25) are formed in the outer wall of the dredging box (2), a positioning rod (26) inserted into the limiting groove (25) is arranged on the gear ring (24), the motor (22) rotates to drive the gear ring (24) to move in the limiting groove (25), the first flexible plate (19) and the second flexible plate (20) are both provided with a driving lever (27) extending out of the dredging box (2), a driving frame (28) is sleeved outside the driving lever (27), the driving frame (28) is movably connected with the gear ring (24), the gear ring (24) drives the driving frame (28) to horizontally move, and an electric push rod (29) for fixing the driving lever (27) is arranged on the driving frame (28), the driving frame (28) controls the deflector rod (27) to drive the first flexible plate (19) and the second flexible plate (20) to move.

7. The hydraulic engineering dredging device according to claim 1, wherein a yielding groove (30) is arranged below the dredging box (2), the first flexible plate (19) and the second flexible plate (20) can be arranged in the yielding groove (30), the yielding groove (30) is divided into two parts, a sensor (31) is arranged in the yielding groove (30), and the sensor (31) is electrically connected with the electric push rod (29).

8. The hydraulic engineering desilting device of claim 1, characterized in that, be equipped with the filter-pressing mechanism in filter-pressing case (4), the filter-pressing mechanism includes two first filter cloth (32) and the second filter cloth (33) that form the closed loop, be equipped with first compression roller (34) in the first filter cloth (32) closed loop, be equipped with a plurality of second compression rollers (35) that are located the compression roller outside in the second filter cloth (33) closed loop, first compression roller (34) is the active driving spare, second compression roller (35) and first filter cloth (32) and second filter cloth (33) contact and produce the extrusion effect when first compression roller (34) rotates.

9. The hydraulic engineering dredging device according to claim 1, wherein the second filter cloth (33) forms a sludge inlet (36), the ends of the first filter cloth (32) and the second filter cloth (33) form a sludge outlet (37), and the filter press box (4) is provided with a scraper (38) at the sludge outlet (37).