CN116378143A - Dredging device - Google Patents

Abstract

The invention discloses a dredging device, comprising: a dredging mechanism, which includes a bucket and a processing box connected to the upper part of the bucket, the upper part of the processing box is provided with a plurality of rollers at intervals along the moving direction of the hull, and the processing box A first filter plate with a plurality of first permeable holes and a second filter plate with a plurality of second permeable holes are arranged at intervals up and down in the lower part, the diameter of the first permeable holes is larger than that of the second permeable holes, and the first permeable holes Between a filter plate and the second filter plate, there is a hole cleaning assembly that can move up and down relative to the processing box. The hole cleaning assembly includes a plurality of annular first rods and a first rod for connecting the plurality of first rods. Two rod bodies, the first rod body is separated from a plurality of first hole cleaning rods and second hole cleaning rods. The beneficial effect of the present invention is to realize the timely treatment of the first water permeable hole and the second water permeable hole by setting the treatment box, the first filter plate, the second filter plate and the cleaning hole assembly, so as to avoid the blockage of the first water permeable hole and the second water permeable hole .

Description

Desilting device

technical field

The invention relates to the technical field of river dredging equipment. More specifically, the present invention relates to a dredging device.

Background technique

The sludge at the bottom of rivers or lakes should be cleaned regularly. If it is not cleaned in time, there will be a large amount of sediment and dirt on the bottom of the water, which will greatly reduce the water storage and ecological capacity. Therefore, it is necessary to deal with underwater sludge and debris in a timely manner. In the prior art, dredging is generally carried out by boat. The patent application number 202111415528.1 discloses a river channel dredging device, which includes the main body of the dredging ship, a salvage component, a silt suction component and a salvage component. The holes and the filter screen realize that the sludge is sucked into the silt suction assembly, but the meshes of the mud leakage holes and the filter screen are easily blocked, and there is a problem that the sludge cannot be discharged.

Contents of the invention

It is an object of the present invention to solve at least the above-mentioned problems and to provide at least the advantages which will be described later.

Still another object of the present invention is to provide a dredging device, which realizes timely processing of the first water permeable hole and the second water permeable hole by setting the treatment box, the first filter plate, the second filter plate and the hole cleaning assembly, so as to avoid the The first water hole and the second water hole are blocked.

In order to achieve these objects and other advantages of the present invention, a dredging device is provided, the dredging device includes a hull, a silt treatment mechanism arranged on the hull, and is characterized in that it also includes: a dredging mechanism, which includes a shovel bucket, and a treatment box connected to the upper part of the bucket. The upper part of the treatment box is provided with a plurality of rollers at intervals along the moving direction of the hull, and the lower part of the treatment box is provided with a first filter plate with a plurality of first water permeable holes at intervals up and down. A second filter plate with a plurality of second permeable holes, the diameter of the first permeable hole is larger than that of the second permeable hole, and there is a filter plate between the first filter plate and the second filter plate that can be used for the treatment. A hole cleaning assembly that moves up and down the box. The hole cleaning assembly includes a plurality of annular first rods and a second rod for connecting the first rods. The first rods are separated by a plurality of first hole cleaning rods. and the second hole cleaning rod, the first hole cleaning rod is arranged vertically upwards, the second hole cleaning rod is arranged vertically downward, the treatment box is connected with a mud discharge pipe, and the mud discharge pipe is connected to the Connectivity of sludge treatment mechanism;

The conveying mechanism communicates with the processing box and is used for receiving the materials on the drum and transferring the materials to the hull.

Preferably, the horizontal section of the processing box is rectangular, and the first rod body is rectangular;

A first scraper assembly is arranged above the first filter plate, which includes a first waterproof cover and a recovery box arranged outside the treatment box, and the recovery box and the first waterproof cover respectively correspond to the The two opposite side walls of the processing box, the first telescopic motor is arranged in the first waterproof cover, the output shaft of the first telescopic motor seals and slides through the side walls of the processing box and is located in the processing box , the end of the output shaft of the first telescopic motor is connected with a scraper, the lower end of the scraper is in contact with the upper surface of the first filter plate, and a discharge port is provided on the treatment box, and the discharge port is connected to the connected to the recycling bin.

Preferably, the first waterproof cover is provided with a second telescopic motor, the output shaft of the second telescopic motor seals and slides through the side wall of the processing box, and the second telescopic motor is located in the first Between a filter plate and the second filter plate, a scraper is connected to the end of the output shaft of the second telescopic motor, and the lower end of the scraper is in contact with the upper surface of the second filter plate. The pipe and the recycling box are located on the same side of the treatment box and the mud discharge pipe is located between the first filter plate and the second filter plate.

Preferably, the distance between the outermost first rod body and the corresponding side wall of the processing box is greater than the thickness of the scraper, and when the output shaft of the second telescopic motor shrinks to the shortest, the The scraper is attached to the side wall of the processing box corresponding to the second telescopic motor;

The two opposite inner side walls of the treatment box are respectively recessed outwards to form grooves, the side walls of the treatment box where the grooves are located are perpendicular to the side walls of the treatment box where the first waterproof cover is located, and the grooves are located at Between the first filter plate and the second filter plate, a plurality of first slide rails are horizontally spaced in the groove, the first slide rails are vertically arranged, and the first slide rails The end face is flush with the inner side wall of the processing box;

The first rod body located on the outermost layer has brackets on both parallel sides, and the parallel sides are parallel to the output shaft of the second telescopic motor, and the two brackets are arranged corresponding to the two grooves. A plurality of first sliders are arranged at intervals on the bracket, and the plurality of first sliders are slidably connected to the plurality of first slide rails in one-to-one correspondence;

Wherein, the length of the first hole-clearing rod is greater than that of the second hole-clearing rod, and the side wall above the groove is provided with a second waterproof cover on the side wall of the processing box. The first telescopic cylinder, the output shaft of the first telescopic cylinder seals and rotates through the second waterproof cover and is positioned to protrude from the second waterproof cover, and the end of the output shaft of the first telescopic cylinder is connected to the bracket so as to Drive the cleaning assembly to slide up and down.

Preferably, a plurality of conical teeth are arranged at intervals on the roller.

Preferably, the conveying mechanism includes a fixed box communicated with the processing box, a metal conveyor belt arranged in the fixed box, and the upper end of the fixed box is connected with the hull.

Preferably, two support frames are provided on the hull, a third telescopic cylinder is provided on the support frame, support rods are provided on both sides of the upper part of the fixed box, and the output shaft of the third telescopic cylinder is connected to the The support rod is connected to drive the fixed box to move up and down;

The front end of the hull is provided with a fixed plate, and a plurality of second telescopic cylinders are fixed on the fixed plate, and the end of the output shaft of the second telescopic cylinder is connected with the fixed box.

Preferably, the drum is provided with a rotating shaft, and the rotating shaft seals and rotates through the side wall of the treatment box and protrudes out of the treatment box;

A third waterproof cover is provided outside the upper part of the treatment box, the end of the rotating shaft is located in the third waterproof cover, and a first gear is provided on the rotating shaft, and a plurality of first gears are communicated together through a first chain, A rotating motor is arranged inside the third waterproof cover, and the rotating motor is connected with one of the first gears.

The present invention at least includes the following beneficial effects:

The present invention realizes the timely treatment of the first water permeable hole and the second water permeable hole by setting the treatment box, the first filter plate, the second filter plate and the hole clearing assembly, so as to avoid the blockage of the first water permeable hole and the second water permeable hole; Set the first filter plate and the second filter plate to separate the dirt and sludge again. This setting can not only reduce the dirt entering the sludge treatment mechanism and reduce the blockage of the sludge discharge pipe, but also reduce the sludge in the sludge by setting the second filter plate. reduce the water content, thereby reducing the workload of the sewage suction pump; the present invention pushes the sludge on the second filter plate to the sludge discharge pipe by setting the second telescopic motor and the scraper, thereby improving work efficiency and reducing sludge Accumulated between the first filter plate and the second filter plate; the present invention can clean the dirt on the first filter plate in time through the first scraper assembly, so as to avoid dirt accumulation and affect the first filter net to filter; the present invention realizes the stability of the first rod moving up and down by setting the first slide rail and the first slider, and by setting the groove and the first slide rail in the groove to facilitate the intervention of the hole cleaning component The movement of the scraper is realized by setting the first telescopic cylinder and the second waterproof cover to drive the cleaning assembly to move up and down.

Other advantages, objectives and features of the present invention will partly be embodied through the following descriptions, and partly will be understood by those skilled in the art through the research and practice of the present invention.

Description of drawings

Fig. 1 is the structural representation of the desilting device described in one of the technical solutions of the present invention;

Figure 2 is an enlarged view of A in Figure 1;

Fig. 3 is a structural schematic diagram of the first slide rail described in one of the technical solutions of the present invention;

Fig. 4 is a schematic structural view of the first filter plate described in one of the technical solutions of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figure 1-4, the present invention provides a kind of dredging device, comprises:

A dredging device, the dredging device includes a hull 1, a sludge treatment mechanism 2 arranged on the hull 1, and also includes: a dredging mechanism, which includes a bucket 3, a treatment box 5 communicated with the top of the bucket 3, the The top of the treatment box 5 is provided with a plurality of rollers at intervals along the moving direction of the hull 1, and the bottom of the treatment box 5 is provided with a first filter plate 13 with a plurality of first water permeable holes 33 at intervals up and down, and a first filter plate 13 with a plurality of second water permeable holes. Two filter plates 14, the diameter of the first permeable hole 33 is greater than that of the second permeable hole, and there is a filter plate between the first filter plate 13 and the second filter plate 14 that can move up and down relative to the treatment box 5. The hole clearing assembly includes a plurality of annular first rod bodies 15 and a second rod body 32 for connecting a plurality of first rod bodies 15, and a plurality of first cleaning holes are separated on the first rod body 15 Rod 16 and the second hole cleaning rod 17, the first hole cleaning rod 16 is arranged vertically upward, the second hole cleaning rod 17 is vertically arranged downward, and the treatment box 5 is connected with a mud discharge pipe 7, so The mud discharge pipe 7 communicates with the sludge treatment mechanism 2;

The conveying mechanism communicates with the processing box 5 and is used to receive the materials on the drum and transfer the materials to the hull 1 .

In this technical scheme, the lowest end of the treatment box 5 is higher than the lowest end of the bucket 3, the shape of the bucket 3 adopts the prior art, and a plurality of drums form a pre-filter to remove large volume The dirt is separated, the first filter plate 13 is provided with a plurality of first permeable holes 33, the second filter plate 14 is provided with a plurality of second permeable holes, the diameter of the first permeable holes 33 is larger than the The diameter of the second permeable hole is described, the first filter plate 13 and the second filter plate 14 are all set horizontally, and a plurality of first hole cleaning rods 16 and a plurality of second hole cleaning rods are respectively arranged on the first rod body 15 Rod 17, the first hole cleaning rod 16 is positioned above the first rod body 15, the second hole cleaning rod 17 is positioned under the first rod body 15, and the diameter of the first hole cleaning rod 16 is approximately Less than the diameter of the first water permeable hole 33, the diameter of the second hole clearing rod 17 is slightly smaller than the diameter of the second water permeable hole, a plurality of first water permeable holes 33 and a plurality of first hole clearing rods 16 one by one Correspondingly set, a plurality of second hole cleaning rods 17 are arranged in one-to-one correspondence with a plurality of second water permeable holes. When the first filter plate 13 is cleaned, the hole cleaning assembly moves upward until the first hole cleaning rod 16 is located at its position. In the corresponding first water-permeable hole 33, when the second filter plate 14 is cleaned, the hole-cleaning assembly moves down until the second hole-clearing rod 17 is located in the corresponding second water-permeable hole. The box 5 is provided with a water outlet 6, and the water outlet 6 is located below the second filter plate 14, and the treatment box 5 can be drained regularly. The mud processing mechanism includes a sewage suction pump, the mud discharge pipe 7 is connected with the sewage suction pump, the outlet end of the sewage suction pump is connected with the screw stacker, the outlet end of the screw stacker is connected with the storage box, and the hull 1 The setting adopts the prior art, and two rotating rollers 4 are arranged in the described bucket 3, and single teeth are arranged on the two rotating rollers 4, and the rotation directions of the two rotating rollers 4 are opposite, and the dirt in the bucket 3 is separated from the two rotating rollers. Pass between two turning rollers 4, and the setting of turning rollers 4 adopts the prior art.

During use, the hull 1 is moved to the position to be dredged, and the bucket 3 is used to shovel the silt. The silt enters the drum through two rotating rollers 4, and the large dirt moves on the conveying mechanism through the drum, and then falls into the ship, while Relatively small volume of dirt and sludge falls on the first filter plate 13 and the second filter plate 14 from between the two drums, the remaining dirt falls on the first filter plate 13, and the sludge falls on the second filter plate 14 , the silt with more water content falls below the second filter plate 14, and during the filtration process, the hole cleaning assembly moves up and down, and moves up until the first hole cleaning rod 16 is located in the first water permeable hole 33, and the first water permeable hole 33. Complete hole cleaning, move down until the second hole cleaning rod 17 is located in the second water permeable hole, complete hole cleaning for the second water permeable hole, and move up and down in this way to reduce blockage.

Adopting this technical solution, the present invention realizes timely processing of the first water permeable hole 33 and the second water permeable hole by setting the treatment box 5, the first filter plate 13, the second filter plate 14 and the cleaning hole assembly, avoiding the first water permeable hole 33 1. The second permeable hole is blocked; the present invention realizes the separation of dirt and sludge again by setting the first filter plate 13 and the second filter plate 14. This setting can not only reduce the entry of dirt into the sludge treatment mechanism 2, but also reduce blockage and sludge discharge Pipe 7, and the water content in the sludge can be reduced by setting the second filter plate 14, thereby reducing the workload of the sewage suction pump.

In another technical solution, the horizontal section of the processing box 5 is rectangular, and the first rod body 15 is rectangular;

The top of the first filter plate 13 is provided with a first scraper assembly, which includes a first waterproof cover 18 located outside the treatment box 5, and a recovery box 8, and the recovery box 8 is connected to the first waterproof cover. 18 respectively correspond to the two opposite side walls of the processing box 5, the first telescopic motor 19 is arranged inside the first waterproof cover 18, and the output shaft of the first telescopic motor 19 slides through the processing box in a sealed manner. 5 and is located in the processing box 5, the end of the output shaft of the first telescopic motor 19 is connected with a scraper 20, the lower end of the scraper 20 is in contact with the upper surface of the first filter plate 13, the The treatment box 5 is provided with a discharge port, and the discharge port communicates with the recovery box 8 to scrape the dirt on the first filter plate 13 into the recovery box 8 through the scraper teeth 20, and the second telescopic motor 21 is electrically connected with the main control part on the hull 1, which is a prior art, and will not be described in detail here. With this technical solution, the present invention can clean up the dirt on the first filter plate 13 in time through the first scraper assembly, so as to avoid dirt accumulation and affect the filtering of the first filter screen.

In another technical solution, the first waterproof cover 18 is provided with a second telescopic motor 21, and the output shaft of the second telescopic motor 21 is sealed and slides through the side wall of the processing box 5 and is located in the In the processing box 5, and the second telescopic motor 21 is located between the first filter plate 13 and the second filter plate 14, the end of the output shaft of the second telescopic motor 21 is connected with a scraper 22, so The scraper 22 is arranged vertically, the lower end of the scraper 22 is in contact with the upper surface of the second filter plate 14, the mud discharge pipe 7 and the recovery box 8 are located on the same side of the treatment box 5 and The mud discharge pipe 7 is located between the first filter plate 13 and the second filter plate 14 , and the second telescopic motor 21 is electrically connected to the main control part on the hull 1 . With this technical solution, the present invention pushes the sludge on the second filter plate 14 to the sludge discharge pipe 7 by setting the second telescopic motor 21 and the scraper 22, thereby improving work efficiency and reducing the accumulation of sludge on the second filter plate 14. between a filter plate 13 and the second filter plate 14 .

In another technical solution, the distance between the first rod body 15 (outermost circle) at the outermost layer and the sidewall of the corresponding processing box 5 is greater than the thickness of the scraper 22 (to facilitate the The first rod body 15 moves up and down), when the output shaft of the second telescopic motor 21 shrinks to the shortest, the scraper 22 is attached to the side wall of the processing box 5 corresponding to the second telescopic motor 21 combine;

Two opposite inner sidewalls of the processing box 5 are respectively outwardly recessed to form grooves 23, and the side walls of the processing box 5 where the grooves 23 are located are perpendicular to the side walls of the processing box 5 where the first waterproof cover 18 is located. , the groove 23 is located between the first filter plate 13 and the second filter plate 14, a plurality of first slide rails 24 are horizontally spaced in the groove 23, and the first slide rails 24 Vertically arranged, and the end face of the first slide rail 24 is flush with the inner sidewall of the processing box 5;

The first rod body 15 located at the outermost layer has brackets 34 on the two parallel sides, and the parallel sides are parallel to the output shaft of the second telescopic motor 21, and the two brackets 34 are aligned with the two grooves 23. Correspondingly arranged, the bracket 34 is provided with a plurality of first sliders at intervals, and the plurality of first sliders are slidably connected to the plurality of first slide rails 24 one by one;

Wherein, the length of the first hole-clearing rod 16 is greater than that of the second hole-clearing rod 17, and the side wall of the processing box 5 above the groove 23 is provided with a second waterproof cover 26. A first telescopic cylinder 27 is arranged inside the waterproof cover 26, and the output shaft of the first telescopic cylinder 27 seals and rotates through the second waterproof cover 26 and is positioned to protrude from the second waterproof cover 26. The end of the output shaft of the cylinder 27 is connected with the support 34 to drive the cleaning assembly to slide up and down. With this technical solution, the present invention realizes the stability of the first rod body 15 moving up and down by setting the first slide rail 24 and the first slide block, and by setting the groove 23 and the first slide rail 24 in the groove 23 to facilitate The hole clearing assembly interferes with the movement of the scraper 22, and the hole cleaning assembly is driven to move up and down by setting the first telescopic cylinder 27 and the second waterproof cover 26.

In another technical solution, a plurality of conical teeth are arranged at intervals on the roller. With this technical solution, the conical teeth are provided to facilitate the transfer of dirt from the drum to the conveying mechanism.

In another technical solution, the conveying mechanism includes a fixed box 9 communicated with the processing box 5 , and a metal conveyor belt arranged in the fixed box 9 , and the upper end of the fixed box 9 is connected with the hull 1 . The technical solution is adopted to realize the transmission of dirt.

In another technical solution, the hull 1 is provided with two support frames 10 (the support frames 10 are vertically arranged), the support frame 10 is provided with a third telescopic cylinder 11, and the fixed box 9 Support rods 12 are provided on both sides of the upper part, and the output shaft of the third telescopic cylinder 11 is connected with the support rods 12 to drive the fixed box 9 to move up and down;

The front end of the hull 1 is provided with a fixing plate 28 on which a plurality of second telescopic cylinders 29 are fixed, and the end of the output shaft of the second telescopic cylinders 29 is connected with the fixed box 9 . By adopting the technical scheme, the conveying mechanism and the dredging mechanism can be driven to move up and down, so that the dredging device can be applied to water areas of different depths.

In another technical solution, the drum is provided with a rotating shaft, and the rotating shaft seals and rotates through the side wall of the processing box 5 and protrudes out of the processing box 5;

The outer side of the upper part of the processing box 5 is provided with a third waterproof cover, the end of the rotating shaft is located in the third waterproof cover, and the rotating shaft is provided with a first gear, and a plurality of first gears are connected together through a first chain , a rotating motor is arranged inside the third waterproof cover, and the rotating motor is connected to one of the first gears. Adopting this technical solution, the present invention realizes driving the rotation of the drum by arranging a rotating shaft, a rotating motor, a first gear, and a first chain.

The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations to the desilting device of the present invention will be apparent to those skilled in the art.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. dredging device, described dredging device comprises hull, is located at the silt processing mechanism on hull, is characterized in that, also comprises: Dredging mechanism, it comprises bucket, the treatment box that is communicated with bucket top, described The upper part of the treatment box is provided with a plurality of rollers at intervals along the moving direction of the hull, and the lower part of the treatment box is provided with a first filter plate with a plurality of first water permeable holes and a second filter plate with a plurality of second water permeable holes at intervals. The diameter of the first water permeable hole is larger than that of the second water permeable hole, and a hole cleaning assembly that can move up and down relative to the treatment box is provided between the first filter plate and the second filter plate, and the hole cleaning assembly It includes a plurality of annular first rod bodies and a second rod body used to connect the plurality of first rod bodies, and a plurality of first hole cleaning rods and second hole cleaning rods are separated on the first rod body, and the first hole cleaning rods The rod is arranged vertically upward, the second hole cleaning rod is arranged vertically downward, and the treatment box is connected with a mud discharge pipe, and the mud discharge pipe is connected with the sludge processing mechanism; The conveying mechanism communicates with the processing box and is used for receiving the materials on the drum and transferring the materials to the hull. 2. The dredging device according to claim 1, wherein the horizontal section of the treatment tank is rectangular, and the first rod body is rectangular; A first scraper assembly is arranged above the first filter plate, which includes a first waterproof cover and a recovery box arranged outside the treatment box, and the recovery box and the first waterproof cover respectively correspond to the The two opposite side walls of the processing box, the first telescopic motor is arranged in the first waterproof cover, the output shaft of the first telescopic motor seals and slides through the side walls of the processing box and is located in the processing box , the end of the output shaft of the first telescopic motor is connected with a scraper, the lower end of the scraper is in contact with the upper surface of the first filter plate, and a discharge port is provided on the treatment box, and the discharge port is connected to the connected to the recycling bin. 3. The dredging device according to claim 2, wherein a second telescopic motor is arranged inside the first waterproof cover, and the output shaft of the second telescopic motor seals and slides through the side of the treatment box. wall, and the second telescopic motor is located between the first filter plate and the second filter plate, the end of the output shaft of the second telescopic motor is connected to a scraper, and the lower end of the scraper is connected to the The upper surface of the second filter plate is in contact, the mud discharge pipe and the recovery box are located on the same side of the treatment box, and the mud discharge pipe is located between the first filter plate and the second filter plate. 4. The dredging device according to claim 3, characterized in that, the distance between the first rod body positioned at the outermost layer and the side wall of the corresponding treatment box is greater than the thickness of the scraper, when the When the output shaft of the second telescopic motor shrinks to the shortest, the scraper is attached to the side wall of the processing box corresponding to the second telescopic motor; The two opposite inner side walls of the treatment box are respectively recessed outwards to form grooves, the side walls of the treatment box where the grooves are located are perpendicular to the side walls of the treatment box where the first waterproof cover is located, and the grooves are located at Between the first filter plate and the second filter plate, a plurality of first slide rails are horizontally spaced in the groove, the first slide rails are vertically arranged, and the first slide rails The end face is flush with the inner side wall of the processing box; The first rod body located on the outermost layer has brackets on both parallel sides, and the parallel sides are parallel to the output shaft of the second telescopic motor, and the two brackets are arranged corresponding to the two grooves. A plurality of first sliders are arranged at intervals on the bracket, and the plurality of first sliders are slidably connected to the plurality of first slide rails in one-to-one correspondence; Wherein, the length of the first hole-clearing rod is greater than that of the second hole-clearing rod, and the side wall above the groove is provided with a second waterproof cover on the side wall of the processing box. The first telescopic cylinder, the output shaft of the first telescopic cylinder seals and rotates through the second waterproof cover and is positioned to protrude from the second waterproof cover, and the end of the output shaft of the first telescopic cylinder is connected to the bracket so as to Drive the cleaning assembly to slide up and down. 5. The dredging device according to claim 4, wherein a plurality of conical teeth are arranged at intervals on the drum. 6. The dredging device according to claim 4, wherein the conveying mechanism comprises a fixed box communicated with the treatment box, a metal conveyor belt arranged in the fixed box, and the upper end of the fixed box is connected to the fixed box. Hull connections described above. 7. The dredging device according to claim 6, characterized in that, the hull is provided with two support frames, the support frame is provided with a third telescopic cylinder, and both sides of the upper part of the fixed box are provided with supports rod, the output shaft of the third telescopic cylinder is connected to the support rod to drive the fixed box to move up and down; The front end of the hull is provided with a fixed plate, and a plurality of second telescopic cylinders are fixed on the fixed plate, and the end of the output shaft of the second telescopic cylinder is connected with the fixed box. 8. The dredging device according to claim 7, wherein a rotating shaft is arranged on the drum, and the rotating shaft seals and rotates through the side wall of the treatment box and protrudes out of the treatment box; A third waterproof cover is provided outside the upper part of the treatment box, the end of the rotating shaft is located in the third waterproof cover, and a first gear is provided on the rotating shaft, and a plurality of first gears are communicated together through a first chain, A rotating motor is arranged inside the third waterproof cover, and the rotating motor is connected with one of the first gears.

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