CN219753347U - Desilting device for hydraulic engineering - Google Patents

Abstract

The utility model discloses a dredging device for hydraulic engineering, which belongs to the technical field of hydraulic engineering dredging, and the technical scheme is characterized by comprising a separation box, wherein a dredging mechanism is arranged at the front side of the top of the separation box, and by arranging the separation box, the dredging mechanism, a separating mud conveying mechanism and a water draining mechanism, when the dredging device is used for dredging, the position of the required dredging mud is sucked through starting a dredging component at the top of the separation box, in the process, the larger garbage and the smaller garbage in the mud are blocked by a filtering component in the dredging component, so that the mud is prevented from being sucked into the separation box through the dredging component, and meanwhile, the bottom of the filtering component is stirred by starting an anti-blocking component in the dredging component when the filtering component is used for filtering, so that the bottom of the filtering component is prevented from being blocked by excessive garbage under the suction of the dredging component, and the blocking condition is caused.

Description

Desilting device for hydraulic engineering

Technical Field

The utility model relates to the technical field of dredging of hydraulic engineering, in particular to a dredging device for hydraulic engineering.

Background

River dredging generally refers to river treatment, and belongs to hydraulic engineering, and sludge at the bottom of a deposited river is blown and stirred into turbid water through mechanical equipment and flows away along with river water, so that a dredging effect is achieved, the normal play of various functions such as flood control, drainage, irrigation, water supply, navigation and the like is increasingly affected by river sedimentation, the normal function of the river is recovered, the rapid sustainable development of economy and society is promoted, and river dredging engineering is carried out, so that the river is deepened and widened through treatment, the river is cleared, the production conditions and living environment of masses are obviously improved, and the aims of 'water clearing, river smoothness, green shore and beautiful scene' are achieved.

Currently, the bulletin number is: CN212956706U, which belongs to the technical field of river dredging equipment, discloses a dredging device for hydraulic engineering, which comprises a stabilizing bottom plate, the top fixedly connected with storage box of this dredging device for hydraulic engineering, when using the device, the device can mostly use the vehicle to pull, the effect of stabilizing the bottom plate can increase the area of contact of storage box and holding surface, strengthen the stability of the device, the effect of side support column is the support of strengthening the storage box from the side, the side support base of strengthening side support column bottom can increase the area of side support column and ground contact, strengthen the stability of side support column support, the effect of reinforcing the triangle is the support of strengthening the side of side support column and the connection between side support column and the side support base, strengthen the stability of side support column support, the effect of reinforcing rod is the stability of strengthening the connection between side support column and the spliced pole.

According to the above patent, there is the following shortcoming when the silt remover for hydraulic engineering is used in the prior art, though this patent carries out reinforcement to whole device, but when sucking to silt, through the rough filter screen with great rubbish interception outside the net, prevent great rubbish to get into the inside of device, the suction that the in-process adsorbs the suction that produces exists and adsorbs great rubbish in the bottom of rough filter screen, can have the condition of jam, and then influence the speed of sucking silt, thereby reduce efficiency, still can cause the damage of equipment in serious cases, and after adsorbing silt to the inside of bin, can not effectually separate sewage and the mud that constitutes of silt, with the mud in this a large amount of sewage can lead to settling in the inside of bin, be difficult to clean, the processing of whole to silt will also be discounted greatly simultaneously, consequently, improve above-mentioned patent with regard to above-mentioned problem.

Disclosure of Invention

The utility model provides a dredging device for hydraulic engineering, which aims to solve the defects that the prior dredging device for hydraulic engineering has the following defects when in use, although the whole device is reinforced and loaded, when the sludge is sucked, larger garbage is intercepted outside a coarse filter screen to prevent the larger garbage from entering the device, the suction generated by adsorption in the process has the condition that the larger garbage is adsorbed at the bottom of the coarse filter screen and is blocked, the speed of sucking the sludge is further influenced, thereby reducing the efficiency, causing equipment damage in severe cases, and separating sewage and sludge composed of the sludge after the sludge is adsorbed into the storage box, so that the sludge in a large amount of sewage can be deposited in the storage box and is difficult to clean, and the whole treatment of the sludge is also greatly discounted.

The utility model discloses a dredging device for hydraulic engineering, which comprises a separation box, wherein a dredging mechanism is arranged at the front side of the top of the separation box, a separation mud conveying mechanism is arranged in the separation box, a drainage mechanism is arranged at the right side of the rear side of the separation box, and the drainage mechanism is communicated with the separation box;

the silt sucking mechanism comprises a silt sucking component, a filtering component and an anti-blocking component, wherein the silt sucking component is arranged at the top of the separation box and is communicated with the separation box, the filtering component is arranged inside the bottom of the front side of the silt sucking component, and the anti-blocking component is arranged inside the silt sucking component.

In order to achieve the effect of sucking sludge, as a dredging device for hydraulic engineering, the dredging assembly preferably comprises a suction water pump, a suction pipe, a conveying pipe and a suction hopper, wherein the suction water pump is bolted on the front side of the top of the separation box, the discharge end of the suction water pump is communicated with the top of the separation box, the rear side of the suction pipe is communicated with the absorption end of the suction water pump, the rear side of the conveying pipe is communicated with the front side of the suction pipe, and the top of the suction hopper is communicated with the bottom of the conveying pipe.

In order to achieve the effect of filtering when the silt sucking component sucks silt, the silt cleaning device for the hydraulic engineering is preferable, and the filtering component comprises a coarse filtering net and a fine filtering net which are sequentially welded in the bottom of the extracting hopper.

In order to achieve the effect of stirring the silt absorbing component to prevent the garbage from blocking the filtering component when the filtering component absorbs the silt for filtering, the silt removing device for the hydraulic engineering is preferable, and the silt removing device for the hydraulic engineering comprises an anti-blocking motor, a rotating shaft and a stirring plate, wherein the anti-blocking motor is bolted to the top of a conveying pipe, the output end of the anti-blocking motor penetrates through the top of the conveying pipe, the top of the rotating shaft is bolted to the output end of the anti-blocking motor, the bottom of the rotating shaft penetrates through the tops of a fine filter screen and a coarse filter screen in sequence, and the top of the stirring plate is bolted to the bottom of the rotating shaft.

In order to achieve the effect of separating sewage and sludge and discharging the sludge discharged into the separating tank, as a dredging device for hydraulic engineering, the separating and conveying mechanism preferably comprises a semicircular filter screen, a conveying port, a conveying motor and a spiral conveying shaft, wherein two sides of the semicircular filter screen are respectively in bolt connection with two sides of the inside of the separating tank, the conveying port is formed in the rear side of the separating tank, the conveying motor is in bolt connection with the front side of the separating tank, the output end of the conveying motor penetrates through the front side of the separating tank, the front side of the spiral conveying shaft is in bolt connection with the output end of the conveying motor, the rear side of the spiral conveying shaft penetrates through the conveying port, and the outer side of the spiral conveying shaft is in contact with the inside of the top of the semicircular filter screen.

In order to achieve the effect of discharging sewage in the separation tank, as a dredging device for hydraulic engineering, the drainage mechanism preferably comprises a drainage pump, a water suction pipe and a drainage pipe, wherein the drainage pump is bolted to the right side of the rear side of the separation tank, the right side of the water suction pipe is bolted to the absorption end of the drainage pump, the top of the water suction pipe penetrates through the bottom of the separation tank and is communicated in the separation tank, and the left side of the drainage pipe is communicated with the discharge end of the drainage pump.

In order to achieve the effect of auxiliary receiving and discharging when the spiral conveying shaft discharges sludge in the separating box through the conveying port, as a dredging device for hydraulic engineering, the rear side of the separating box is preferably bolted with a sludge receiving and discharging bucket, and the sludge receiving and discharging bucket is positioned at the bottoms of the rear sides of the conveying port and the spiral conveying shaft.

In order to achieve the effect of reinforcing and supporting the separation tank to ensure stability in use, the dredging device for hydraulic engineering is preferable, and reinforcing supporting legs are bolted to the front side and the rear side of the two sides of the separation tank.

Compared with the prior art, the utility model has the beneficial effects that:

this sediment removal device for hydraulic engineering through setting up the separator tank, inhale the silt mechanism, separation conveying mechanism and drainage mechanism, when the user device carries out the desilting and uses, inhale the position of silt subassembly to required clearance silt through starting the separator tank top, at this in-process inhale the inside filter module of silt subassembly and realize sheltering from the barrier to the inside great rubbish of silt and less rubbish, in order to avoid getting into the separator tank through inhaling the silt subassembly suction, simultaneously when filter module filters the use, start and inhale the inside anti-blocking subassembly of silt subassembly and stir filter module's bottom, in order to avoid inhaling the excessive rubbish jam under the silt subassembly suction in filter module's bottom, lead to the condition emergence of jam, so avoid influencing the speed of absorbing the silt, and guarantee the efficiency of desilting, then inhale the silt subassembly and inhale the inside back of discharging to the separator tank, through the inside separation conveying mechanism of starting the separator tank realization separates the sewage and mud of silt, make sewage drip to the inside bottom of separator tank, and the inside of separated mud is carried out by the filter module and is carried out the inside of separator tank, can be avoided the inside of this sediment tank to carry out the inside of this sediment tank to the inside the sewage, can be more thoroughly treated with the inside the sewage side is difficult to realize the sediment removal to the inside the sediment removal mechanism, simultaneously, the sediment is difficult to be discharged to the inside the sediment removal side is guaranteed to be more thoroughly is simultaneously to the inside the sewage is discharged to be more difficult to the inside the sewage is discharged to be separated.

Drawings

FIG. 1 is a whole structure diagram of a dredging device for hydraulic engineering;

FIG. 2 is a schematic diagram of components of a silt sucking mechanism according to the present utility model;

FIG. 3 is a schematic view of a silt sucking assembly according to the present utility model;

FIG. 4 is a schematic view of the structure of the filter assembly and the anti-blocking assembly of the present utility model;

FIG. 5 is a schematic diagram of a separating and conveying mechanism according to the present utility model;

fig. 6 is a schematic structural view of a drainage mechanism in the present utility model.

In the figure, 1, a separation box; 2. a silt sucking mechanism; 201. a silt sucking component; 2011. a suction water pump; 2012. a suction tube; 2013. a delivery tube; 2014. extracting a bucket; 202. a filter assembly; 2021. a coarse filter screen; 2022. a fine filter screen; 203. an anti-blocking assembly; 2031. an anti-blocking motor; 2032. a rotating shaft; 2033. an agitating plate; 3. separating a mud conveying mechanism; 301. a semicircular filter screen; 302. a delivery port; 303. a conveying motor; 304. a screw conveying shaft; 4. a drainage mechanism; 401. a draining pump; 402. a water suction pipe; 403. a drain pipe; 5. a mud receiving and discharging bucket; 6. reinforcing the support legs.

Description of the embodiments

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-6, the present utility model provides the following technical solutions: the dredging device for the hydraulic engineering comprises a separation box 1, wherein a dredging mechanism 2 is arranged on the front side of the top of the separation box 1, a separation mud conveying mechanism 3 is arranged in the separation box 1, a drainage mechanism 4 is arranged on the right side of the rear side of the separation box 1, and the drainage mechanism 4 is communicated with the separation box 1;

inhale silt mechanism 2 and include inhale silt subassembly 201, filter component 202 and prevent stifled subassembly 203, inhale silt subassembly 201 and set up at the top of separator box 1 and with separator box 1 intercommunication, filter component 202 sets up the inside in inhaling silt subassembly 201 front side bottom, prevents stifled subassembly 203 setting in the inside of inhaling silt subassembly 201.

In this embodiment: through setting up separator tank 1, inhale silt mechanism 2, separation sediment transport mechanism 3 and drainage mechanism 4, when the user device carries out the desilting and uses, inhale the position of silt subassembly 201 to required clearance silt through starting separator tank 1 top, at this in-process inhale the inside filter module 202 realization of silt inside and shelter from blocking to less rubbish, in order to avoid getting into separator tank 1 through inhaling silt subassembly 201 suction, simultaneously when filter module 202 filters the use, start and inhale the inside anti-blocking subassembly 203 of silt subassembly 201 and stir filter module 202's bottom, in order to avoid inhaling the bottom that silt subassembly 201 suction is too much down and blockked up in filter module 202, lead to the condition to take place, so as to avoid influencing the speed of absorbing the silt, and guarantee the efficiency of desilting, then inhale the inside back of silt subassembly 201 with silt to separator tank 1, realize carrying out the sewage and the mud separation to silt through starting the inside separation sediment transport mechanism 3 of separator tank 1, make sewage drip to the inside bottom of separator tank 1, and the inside of being separated by the inside is then carried out the inside of separator tank 3 and is carried out the inside to separate the sediment transport mechanism 1, the inside is difficult to realize the inside sediment removal 1, and the volume is difficult to be in this side is in order to realize the inside the sediment removal 1, and the inside is more thoroughly is difficult to be treated to realize at this side is difficult to be treated to the inside the sediment removal 1.

As a technical optimization scheme of the present utility model, the silt suction assembly 201 includes a suction pump 2011, a suction pipe 2012, a conveying pipe 2013 and a suction bucket 2014, the suction pump 2011 is bolted on the front side of the top of the separation tank 1, the discharge end of the suction pump 2011 is communicated with the top of the separation tank 1, the rear side of the suction pipe 2012 is communicated with the absorption end of the suction pump 2011, the rear side of the conveying pipe 2013 is communicated with the front side of the suction pipe 2012, and the top of the suction bucket 2014 is communicated with the bottom of the conveying pipe 2013.

In this embodiment: by providing the suction pump 2011, the suction pipe 2012, the delivery pipe 2013 and the suction hopper 2014, when sludge is cleaned, the suction hopper 2014 is placed inside the sludge, suction is applied to the suction pipe 2012 and the delivery pipe 2013 through the suction pump 2011 on the top of the start-up separation tank 1, so that the suction hopper 2014 communicated with the bottom of the delivery pipe 2013 sucks the sludge, and the sludge is sucked and discharged to the inside of the separation tank 1 through the suction pipe 2012 and the suction pump 2011.

As a technical optimization scheme of the utility model, the filter assembly 202 comprises a coarse filter screen 2021 and a fine filter screen 2022, and the coarse filter screen 2021 and the fine filter screen 2022 are sequentially welded inside the bottom of the extraction hopper 2014.

In this embodiment: through setting up coarse filter screen 2021 and thin filter screen 2022, when suction pump 2011 control extraction fill 2014 pumps silt, through coarse filter screen 2021 and thin filter screen 2022 that set up in extraction fill 2014 respectively to great rubbish with intercept less rubbish to this avoids being inhaled by suction pump 2011 and discharges to the inside of separator box 1, avoids being difficult to clear up the effect.

As a technical optimization scheme of the present utility model, the anti-blocking assembly 203 includes an anti-blocking motor 2031, a rotation shaft 2032 and an agitation plate 2033, the anti-blocking motor 2031 is bolted to the top of the conveying pipe 2013, the output end of the anti-blocking motor 2031 penetrates through the top of the conveying pipe 2013, the top of the rotation shaft 2032 is bolted to the output end of the anti-blocking motor 2031, the bottom of the rotation shaft 2032 penetrates through the tops of the fine filter screen 2022 and the coarse filter screen 2021 in sequence, and the top of the agitation plate 2033 is bolted to the bottom of the rotation shaft 2032.

In this embodiment: through setting up anti-blocking motor 2031, axis of rotation 2032 and stirring board 2033, when coarse filter screen 2021 and fine filter screen 2022 intercept great rubbish and with less rubbish, the anti-blocking motor 2031 through the start-up conveyer pipe 2013 top drives axis of rotation 2032 and rotates in conveyer pipe 2013 and the inside of fine filter screen 2022 and coarse filter screen 2021 to the realization drives axis of rotation 2032 that is located coarse filter screen 2021 bottom and rotates, with this in order to avoid the too much rubbish to block up in coarse filter screen 2021's bottom under suction pump 2011, the condition that leads to the jam takes place, avoids influencing the speed of sucking silt, and guarantees the efficiency of sucking silt.

As a technical optimization scheme of the utility model, the separating and conveying mechanism 3 comprises a semicircular filter screen 301, a conveying port 302, a conveying motor 303 and a spiral conveying shaft 304, wherein two sides of the semicircular filter screen 301 are respectively in bolt connection with two sides of the inside of the separating box 1, the conveying port 302 is formed in the rear side of the separating box 1, the conveying motor 303 is in bolt connection with the front side of the separating box 1, the output end of the conveying motor 303 penetrates through the front side of the separating box 1, the front side of the spiral conveying shaft 304 is in bolt connection with the output end of the conveying motor 303, the rear side of the spiral conveying shaft 304 penetrates through the conveying port 302, and the outer side of the spiral conveying shaft 304 is in contact with the inside of the top of the semicircular filter screen 301.

In this embodiment: through setting up semicircle filter screen 301, delivery port 302, conveying motor 303 and screw conveying axle 304, when sucking and discharging silt to the inside of separator box 1 through suction water pump 2011, can fall on the inside semicircle filter screen 301 surface of separator box 1, and start screw conveying axle 304 under the state that conveying motor 303 starts and stir the silt that is located semicircle filter screen 301 surface, so that sewage and the mud of silt separate, make sewage drip to the inside bottom of separator box 1, and the mud that is separated then is carried out the inside of separator box 1 by screw conveying axle 304 through the delivery port 302 of separator box 1, so that can avoid a large amount of mud in the sewage to lead to settling at the inside bottom side of separator box 1.

As a technical optimization scheme of the present utility model, the drainage mechanism 4 includes a drainage pump 401, a water suction pipe 402 and a drainage pipe 403, the drainage pump 401 is bolted to the right side of the rear side of the separation tank 1, the right side of the water suction pipe 402 is bolted to the absorption end of the drainage pump 401, the top of the water suction pipe 402 penetrates through the bottom of the separation tank 1 and is communicated with the inside of the separation tank 1, and the left side of the drainage pipe 403 is communicated with the drainage end of the drainage pump 401.

In this embodiment: through setting up drain pump 401, water suction pipe 402 and drain pipe 403, after the sewage drip behind silt was separated to the inside bottom side of separator tank 1, through the drain pump 401 of starting separator tank 1 rear side to apply suction with the water suction pipe 402 of separator tank 1 intercommunication to realize the sewage suction in the separator tank 1 inside, then discharge through drain pipe 403 again, with this realization is to the treatment of sewage.

As a technical optimization scheme of the utility model, the rear side of the separation box 1 is bolted with a mud receiving bucket 5, and the mud receiving bucket 5 is positioned at the bottom of the rear side of the conveying port 302 and the screw conveying shaft 304.

In this embodiment: by providing the sludge receiving bucket 5, the effect of assisting in receiving and discharging when the spiral conveying shaft 304 discharges the sludge inside the separation tank 1 through the conveying port 302 can be achieved, so that the practicability is increased.

As a technical optimization of the utility model, the front side and the rear side of both sides of the separation tank 1 are bolted with reinforcing support legs 6.

In this embodiment: through setting up reinforcing support leg 6, can consolidate and support to separate case 1 to guarantee the stable effect when using.

Working principle: firstly, when the device is used for dredging, the suction hopper 2014 is placed in the interior of sludge, suction is applied to the suction pipe 2012 and the conveying pipe 2013 through the suction water pump 2011 at the top of the starting separation box 1, so that the suction hopper 2014 communicated with the bottom of the conveying pipe 2013 pumps the sludge, meanwhile, the coarse filter screen 2021 and the fine filter screen 2022 arranged in the interior of the suction hopper 2014 intercept larger garbage and smaller garbage respectively, so that the suction water pump 2011 is prevented from sucking and discharging the garbage to the interior of the separation box 1, the effect of difficult cleaning is avoided, and the anti-blocking motor 2031 at the top of the starting conveying pipe 2013 drives the rotation shaft 2032 to rotate in the interior of the conveying pipe 2013 and the fine filter screen 2022, so that the rotation shaft 2032 positioned at the bottom of the coarse filter screen 2021 is driven to rotate, the condition that the garbage at the bottom of the suction water pump 2011 is blocked at the bottom of the filter screen 2021, the blocking is prevented from being caused, the suction water pump 2011 is prevented from being sucked and discharged to the interior of the separation box 1, the sludge is prevented from being sucked and discharged to the interior of the separation box 1 through the inner side of the spiral separation box 301, and the sewage is prevented from being separated by the inner side of the sewage inlet of the spiral separation box 301, and the sewage is prevented from being separated by the inner side of the sewage is separated by the spiral separation box 301, and the inner side of the sewage is prevented from being separated by the bottom of the sewage is separated by the inner side of the sewage inlet 1, the bottom of the starting separation box 1, the bottom of the starting separation box 1 is separated by the bottom of the sludge is separated by the bottom of the suction box 1, simultaneously, the drainage pump 401 at the rear side of the separation tank 1 is started to apply suction force to the water suction pipe 402 communicated with the separation tank 1, so that the sewage in the separation tank 1 is sucked out, and then the sewage is discharged through the drainage pipe 403, so that the sludge is treated, and the sludge is thoroughly treated.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. The utility model provides a dredging device for hydraulic engineering, includes separator box (1), its characterized in that: the device is characterized in that a silt sucking mechanism (2) is arranged on the front side of the top of the separation box (1), a separation mud conveying mechanism (3) is arranged in the separation box (1), a drainage mechanism (4) is arranged on the right side of the rear side of the separation box (1), and the drainage mechanism (4) is communicated with the separation box (1);

inhale silt mechanism (2) including inhaling silt subassembly (201), filter component (202) and anti-blocking component (203), inhale silt subassembly (201) setting at the top of separator box (1) and with separator box (1) intercommunication, filter component (202) set up in the inside of inhaling silt subassembly (201) front side bottom, anti-blocking component (203) set up in the inside of inhaling silt subassembly (201).

2. The dredging device for hydraulic engineering according to claim 1, wherein: the silt sucking assembly (201) comprises a sucking water pump (2011), a sucking pipe (2012), a conveying pipe (2013) and a sucking hopper (2014), wherein the sucking water pump (2011) is bolted to the front side of the top of the separation box (1), the discharging end of the sucking water pump (2011) is communicated with the top of the separation box (1), the rear side of the sucking pipe (2012) is communicated with the absorbing end of the sucking water pump (2011), the rear side of the conveying pipe (2013) is communicated with the front side of the sucking pipe (2012), and the top of the sucking hopper (2014) is communicated with the bottom of the conveying pipe (2013).

3. The dredging device for hydraulic engineering according to claim 2, wherein: the filter assembly (202) comprises a coarse filter screen (2021) and a fine filter screen (2022), wherein the coarse filter screen (2021) and the fine filter screen (2022) are sequentially welded inside the bottom of the extraction hopper (2014).

4. A dredging apparatus for hydraulic engineering according to claim 3, wherein: anti-blocking assembly (203) is including preventing stifled motor (2031), axis of rotation (2032) and stirring board (2033), anti-blocking motor (2031) bolt is at the top of conveyer pipe (2013), the output of anti-blocking motor (2031) runs through the top of conveyer pipe (2013), the top of axis of rotation (2032) and the output bolt of anti-blocking motor (2031), the top of axis of rotation (2032) runs through the top of fine filter screen (2022) and coarse filter screen (2021) in proper order, the top of stirring board (2033) and the bottom bolt of axis of rotation (2032).

5. The dredging device for hydraulic engineering according to claim 1, wherein: the separating and conveying mechanism (3) comprises a semicircular filter screen (301), a conveying port (302), a conveying motor (303) and a spiral conveying shaft (304), wherein two sides of the semicircular filter screen (301) are respectively in bolt connection with two sides of the inside of the separating box (1), the conveying port (302) is formed in the rear side of the separating box (1), the conveying motor (303) is in bolt connection with the front side of the separating box (1), the output end of the conveying motor (303) penetrates through the front side of the separating box (1), the front side of the spiral conveying shaft (304) is in bolt connection with the output end of the conveying motor (303), the rear side of the spiral conveying shaft (304) penetrates through the conveying port (302), and the outer side of the spiral conveying shaft (304) is in contact with the inside of the top of the semicircular filter screen (301).

6. The dredging device for hydraulic engineering according to claim 1, wherein: drainage mechanism (4) are including drain pump (401), water suction pipe (402) and drain pipe (403), the right side of drain pump (401) bolt at separator tank (1) rear side, the right side of water suction pipe (402) is bolted with the absorption end of drain pump (401), the top of water suction pipe (402) runs through the bottom of separator tank (1) and communicates in the inside of separator tank (1), the left side of drain pipe (403) communicates with the discharge end of drain pump (401).

7. The dredging device for hydraulic engineering according to claim 5, wherein: the rear side of the separation box (1) is bolted with a mud receiving downward bucket (5), and the mud receiving downward bucket (5) is positioned at the bottom of the rear sides of the conveying port (302) and the spiral conveying shaft (304).

8. The dredging device for hydraulic engineering according to claim 1, wherein: the front side and the rear side of the two sides of the separation box (1) are respectively bolted with a reinforced supporting leg (6).