Harbor channel dredging device

Abstract

The application discloses a port channel dredging device, which is fixed on a dredging ship and comprises a suction pipe, at least two mud discharge pipes and at least two mud separation assemblies. One end of the suction pipe is communicated with a suction head, and the other end of the suction pipe is communicated with the at least two mud discharge pipes. Each of the mud discharge pipes is provided with a mud discharge valve. Each of the mud separation assemblies is arranged below the mud discharge pipe in one-to-one correspondence. Each of the mud separation assemblies comprises a separation box, a sewage collection box and a mud collection box arranged in sequence from top to bottom. The separation box is communicated with the sewage collection box through sieve holes arranged at the bottom of the separation box. The separation box is communicated with the mud collection box through a mud discharge channel penetrating through the sewage collection box and the bottom of the separation box. The top of the mud discharge channel is provided with a mud discharge door. A drain pipe is arranged outside the lower part of the sewage collection box and communicated with the inside of the sewage collection box. The two ends of the drain pipe extend to the two sides of the dredging ship respectively. The application has the advantages of high dredging efficiency, convenient unloading and transportation of the mud and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of channel dredging. More particularly, the present application relates to a port channel dredging device. BACKGROUND

[0002] During a long time of operation, the silt at the bottom of the port channel will continuously accumulate, which causes the depth of the port channel to gradually become shallower, and affects the traffic capacity of the channel. Therefore, it is necessary to regularly carry out dredging operation on the port channel.

[0003] The existing port channel dredging generally uses a dredging ship. The dredging ship sucks the silt to the cabin through the underwater suction head. When the cabin is full of silt, the silt is transported to the shore, and then the silt in the cabin is unloaded to the silt storage area on the shore by manual or mechanical means. By using the above-mentioned method, firstly, the water content in the silt is large, and the cabin is easily filled with silt, which increases the frequency of the dredging ship going back and forth to the shore, and secondly, the unloading and transportation of the silt are troublesome. SUMMARY

[0004] The purpose of the present application is to provide a port channel dredging device to at least solve the above-mentioned problems.

[0005] In order to achieve the purpose of the present application and other advantages, a port channel dredging device is provided, which is fixed on a dredging ship and comprises: a silt suction pipe, one end of which is in communication with a silt suction head, and the other end of which is in communication with at least two silt discharge pipes, each of which is provided with a silt discharge valve; at least two silt separation assemblies, which are arranged one by one below the silt discharge pipes, each of which comprises a separation tank, a sewage collection tank and a silt collection tank arranged in sequence from top to bottom, the separation tank and the sewage collection tank are in communication through the screen holes provided at the bottom of the separation tank, the separation tank and the silt collection tank are in communication through the silt discharge channel provided through the sewage collection tank and the bottom of the separation tank, and the top of the silt discharge channel is provided with a silt discharge door; a drain pipe, which is provided on the outside of the lower part of the sewage collection tank and is in communication with the inside of the sewage collection tank, and the two ends of the drain pipe extend to the two sides of the dredging ship respectively.

[0006] Preferably, the port channel dredging device further comprises: a support assembly, which is fixed on the dredging ship and comprises a support plate, which is a inverted U-shaped plate, a horizontal plate of the support plate is provided with an opening corresponding to the silt separation assembly, the separation tank is fixed above the opening on the horizontal plate, and the sewage collection tank is fixed below the opening on the horizontal plate; a support frame, which is an inverted U-shaped frame, is fixed on the support plate, a pipe clamp is fixed on the horizontal part of the support frame, and the silt suction pipe is supported and fixed on the support frame through the pipe clamp.

[0007] Preferably, the port channel dredging device further includes: a first extrusion assembly, which includes a pair of first extrusion plates, which are arranged on the left and right sides of the separation box, each first extrusion plate is driven by a first linear drive arranged outside the separation box and on the same side, and the front and rear sides of the first extrusion plate are respectively provided with a plurality of first openings at equal intervals along its height direction, each first opening is horizontally arranged and connected to the outside, and the upper and lower sides of each first opening are provided with a first air bag along its length direction, and the first exhaust valve is provided at one end of the first extrusion plate near the middle of the first extrusion plate on the first air bag, and the first air inlet valve is provided at the other end; a pair of second extrusion plates, which are provided on the front and rear sides of the separation box, each second extrusion plate is driven by a second linear drive arranged outside the separation box and on the same side, and the left and right sides of the second extrusion plate are respectively provided with a plurality of first openings at equal intervals along its height direction A plurality of second openings are provided at equal intervals, each second opening is arranged horizontally and connected to the outside, and a second air bag is provided on the upper and lower sides of each second opening along its length direction, and a second exhaust valve is provided at one end of the second air bag close to the middle of the second extrusion plate, and a second air intake valve is provided at the other end, and the left and right sides of the bottom of the second extrusion plate are arranged as telescopic plates, and the telescopic plates can be extended and retracted along the length direction of the second extrusion plate; wherein, the first opening and the second opening are staggered, and the adjacent ends of the first extrusion plate and the second extrusion plate are arranged to be plugged and engaged with each other through the first opening and the second opening, and the part of the first extrusion plate other than the first opening and the part of the second extrusion plate other than the second opening are both provided with a plurality of filter holes at intervals, and the entrance of the sludge discharge channel is arranged in the middle of the separation box.

[0008] Preferably, the port channel dredging device further includes: a second extrusion assembly, which is arranged above the separation box and opposite to the entrance of the dredging channel, the second extrusion assembly includes a third linear drive, which is fixed on the horizontal part of the support frame, and an extrusion plate, which is horizontally arranged below the third linear drive and fixedly connected to its output end.

[0009] Preferably, the silt discharge door includes two doors, and the opposite sides of the two doors are pivotally connected to the side walls of the silt discharge channel respectively. At least two fourth linear drives are respectively fixed outside the silt discharge channel and are located on the same side as the pivotal side of the door. Each fourth linear drive is located below the door, and the output end of the fourth linear drive is configured to be able to extend into the silt discharge channel and control the opening and closing of the silt discharge door.

[0010] Preferably, a support box is fixedly provided below the sewage collection box, the support box is fixedly provided on the deck of the dredging vessel, the front and rear sides of the support box are open, and the sludge collection box is slidably provided in the support box.

[0011] Preferably, the bottom of the silt collecting box is provided with an upwardly recessed limiting chute arranged along the front-rear direction of the silt collecting box, and the deck is provided with a limiting slide rail matched with the limiting chute.

[0012] Preferably, the end of the limiting slide rail is fixed with a vertical upward anchor rod, the rear side wall of the silt collecting box is provided with a mounting groove, and the mounting groove is hingedly connected with a connecting plate provided with an anchor hole matched with the anchor rod.

[0013] The present application at least includes the following beneficial effects:

[0014] The present application at least includes the following beneficial effects:

[0015] Other advantages, objects and features of the present application will be apparent to those skilled in the art from the following description, and will be appreciated and understood by those skilled in the art upon reading and understanding the following specification and claims. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a port channel dredging device according to an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of the cross-sectional structure of a silt separating assembly according to an embodiment of the present application;

[0018] Figure 3 is Figure 2 is an enlarged view of the local part A;

[0019] Figure 4 is a schematic diagram of the top view structure of a separating box according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the embodiments and the accompanying drawings, so that those skilled in the art can implement the present application according to the description and the drawings.

[0021] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that the experimental methods described in the following embodiments are conventional methods, and the reagents and materials are commercially available unless otherwise specified. In the description of the present application, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] As shown in Figures 1-4 The embodiment of the present application provides a port channel dredging device, which is fixed on a dredging ship 1 and comprises a suction pipe 2, at least two discharge pipes 3, at least two sludge separation assemblies, and a drain pipe 10. One end of the suction pipe 2 is in communication with a suction head (not shown) placed underwater, and the other end of the suction pipe 2 is placed above the dredging ship 1 and is preferably arranged along the width direction (left-right direction in the figure) of the dredging ship 1. The other end of the suction pipe 2 is in communication with the at least two discharge pipes 3. Each discharge pipe 3 is provided with a discharge valve 4. Each sludge separation assembly is correspondingly arranged below the discharge pipe 3. Each sludge separation assembly comprises, from top to bottom, a separation tank 5, a sewage collection tank 6, and a sludge collection tank 7. The separation tank 5 and the sewage collection tank 6 are in communication through a sieve hole 51 arranged at the bottom of the separation tank 5. The separation tank 5 and the sludge collection tank 7 are in communication through a discharge channel 8 arranged through the sewage collection tank 6 and the bottom of the separation tank 5. The top of the discharge channel 8 is provided with a discharge door 9. The drain pipe 10 is arranged outside the lower part of the sewage collection tank 6 and is in communication with the inside of the sewage collection tank 6. Both ends of the drain pipe 10 extend to both sides of the dredging ship 1, respectively.

[0024] In the above embodiment, the port channel dredging device comprises the suction pipe 2, the sludge separation assembly, and the drain pipe 10. One end of the suction pipe 2 is in communication with the suction head placed underwater, and the other end of the suction pipe 2 is placed above the dredging ship 1 and is preferably arranged along the width direction (left-right direction in the figure) of the dredging ship 1. The other end of the suction pipe 2 is in communication with the at least two discharge pipes 3. Each discharge pipe 3 is provided with a discharge valve 4. Figure 1The two dredging pipes 3 are communicated with the two dredging valves 4, and the dredging valves 4 are used for controlling the opening and closing of the dredging pipes 3. The number of the sludge separation assemblies corresponds to the number of the dredging pipes 3, each sludge separation assembly is fixedly arranged on the deck of the dredging ship 1 and located below the dredging pipe 3, and each sludge separation assembly comprises a separation box 5, a sewage collection box 6 and a sludge collection box 7 which are sequentially arranged from top to bottom. The top of each of the separation box 5, the sewage collection box 6 and the sludge collection box 7 is preferably open to save materials and reduce the weight of the sludge separation assembly. The top of the separation box 5 is opposite to the corresponding dredging pipe 3. The separation box 5 is communicated with the sewage collection box 6 through a sieve hole 51 arranged at the bottom of the separation box 5. The separation box 5 is communicated with the sludge collection box 7 through a dredging channel 8 penetrating through the sewage collection box 6 and the bottom of the separation box 5. The top and the bottom of the dredging channel 8 are open, and the top of the dredging channel 8 is provided with a dredging door 9. A drainage pipe 10 is arranged outside the lower part of the sewage collection box 6 along the width direction of the dredging ship 1 and communicated with the inside of the sewage collection box 6. The two ends of the drainage pipe 10 extend to the two sides of the dredging ship 1 respectively to directly discharge the sewage separated from the sludge into the channel.

[0025] In use, the channel sludge is taken by the suction head, introduced into the separation box 5 through the suction pipe 2 and the dredging pipe 3, and separated from water in the separation box 5 under the action of gravity. The separated sewage falls into the sewage collection box 6 through the sieve hole 51 at the bottom of the separation box 5, and then directly discharged into the channel through the drainage pipe 10. The separated sludge falls into the sludge collection box 7 through the dredging door 9 and the dredging channel 8, and collected and transported by the sludge collection box 7. The multiple sludge separation assemblies are not operated at the same time, and when the sludge separation assembly is stopped (the corresponding dredging valve 4 is closed for a predetermined time), the dredging door 9 is opened to collect the separated sludge.

[0026] The present application adds the sludge separation assembly and the drainage pipe below the dredging pipe, separates the channel sludge taken by the suction head through the sludge separation assembly to reduce the water content in the sludge, collects the separated sludge in the sludge collection box, facilitates the subsequent unloading and transportation of the sludge, collects the separated sewage through the sewage collection box and directly discharges it into the river through the drainage pipe, prolongs the time required for the sludge to be full, effectively reduces the frequency of the dredging ship to and from the shore, and improves the dredging efficiency.

[0027] In another embodiment, the port channel dredging device further comprises a support assembly fixed on the dredging ship 1, which comprises a support plate 11 in the shape of an inverted U-shaped plate, a plurality of openings corresponding to the sludge separation assembly are provided through the horizontal plate of the support plate 11, the separation tank 5 is fixed above the openings on the horizontal plate, and the sewage collection tank 6 is fixed below the openings on the horizontal plate; a support frame 12 in the shape of an inverted U-shaped frame is fixed on the support plate 11, and a pipe clamp 13 is fixed on the horizontal part of the support frame 12, and the suction pipe 2 is supported and fixed on the support frame 12 through the pipe clamp 13.

[0028] In this embodiment, the port channel dredging device further comprises a support assembly, which preferably comprises a support plate 11, a support frame 12 and a pipe clamp 13, and the separation tank 5, the sewage collection tank 6 and the suction pipe 2 are supported and fixed by the support plate 11, the support frame 12 and the pipe clamp 13, so that the structure is stable and easy to disassemble and assemble.

[0029] In another embodiment, the port channel dredging device further comprises a first extrusion assembly, which comprises a pair of first extrusion plates 14 arranged on the left and right sides in the separation tank 5, each first extrusion plate 14 is driven by a first linear actuator 15 arranged on the same side outside the separation tank 5, a plurality of first openings are arranged at equal intervals along the height direction of the front and back of each first extrusion plate 14, each first opening is horizontally arranged and communicates with the outside, and a first air bag is arranged on the upper and lower sides of each first opening along the length direction, one end of the first air bag close to the middle of the first extrusion plate is provided with a first exhaust valve, and the other end is provided with a first air inlet valve; a pair of second extrusion plates 16 are arranged on the front and back sides in the separation tank 5, each second extrusion plate 16 is driven by a second linear actuator 17 arranged on the same side outside the separation tank 5, a plurality of second openings are arranged at equal intervals along the height direction of the left and right sides of each second extrusion plate 16, each second opening is horizontally arranged and communicates with the outside, and a second air bag 18 is arranged on the upper and lower sides of each second opening along the length direction, one end of the second air bag 18 close to the middle of the second extrusion plate 16 is provided with a second exhaust valve, and the other end is provided with a second air inlet valve, and the bottom of the second extrusion plate 16 is provided with a telescopic plate 19 on the left and right sides, which can be sealed and telescoped along the length direction of the second extrusion plate 16; wherein the first openings and the second openings are arranged alternately, the adjacent ends of the first extrusion plates 14 and the second extrusion plates 16 are arranged to be inserted and engaged with each other through the first openings and the second openings, and a plurality of filter holes 20 are arranged at intervals on the parts of the first extrusion plates 14 and the second extrusion plates 16 other than the first openings and the second openings, and the inlet of the sludge discharge channel 8 is arranged at the middle of the separation tank 5.

[0030] In the embodiment, the port channel dredging device further comprises a first extrusion assembly, the first extrusion assembly comprises a pair of first extrusion plates 14 and a pair of second extrusion plates 16 arranged in the separation box 5, the pair of first extrusion plates 14, the pair of second extrusion plates 16 and the bottom of the separation box 5 form a cuboid structure, and the pair of first extrusion plates 14 and the pair of second extrusion plates 16 are respectively driven by the first linear driver 15 and the second linear driver 17 arranged outside the separation box 5 to move along the left-right direction or the front-back direction of the separation box 5, so as to change the size of the cuboid structure formed by the pair of first extrusion plates 14 and the pair of second extrusion plates 16, that is, the pair of first extrusion plates 14 and the pair of second extrusion plates 16 are gathered to the middle part of the separation box 5 to extrude the sludge, and the extruded sewage flows into the sewage collection box 6 through the filter holes 20 arranged on the first extrusion plate 14 and the second extrusion plate 16 and the screen holes 51 arranged at the bottom of the separation box 5, that is, the first extrusion assembly drives the pair of first extrusion plates 14 and the pair of second extrusion plates 16 to extrude the sludge through the first linear driver 15 and the second linear driver 17, thereby effectively improving the efficiency of separating the sewage in the sludge.

[0031] Specifically, in the initial state, the first pair of extrusion plates 14 are in contact with the left and right side walls in the separation tank 5, and the front and back sides of the first pair of extrusion plates 14 are in contact with the front and back side walls in the separation tank 5, the bottom surface of the first pair of extrusion plates 14 is in contact with the bottom surface of the separation tank 5, the second pair of extrusion plates 16 are in contact with the front and back side walls in the separation tank 5, and the left and right sides of the second pair of extrusion plates 16 are in contact with the first pair of extrusion plates 14, the bottom surface of the second pair of extrusion plates 16 is in contact with the bottom surface of the separation tank 5, the end of the part of the first pair of extrusion plates 14 between the two first openings is inserted into the corresponding second opening of the second pair of extrusion plates 16, the end of the part of the second pair of extrusion plates 16 between the two second openings is inserted into the corresponding first opening of the first pair of extrusion plates 14, and the end of the part of the second pair of extrusion plates 16 between the telescopic plate 19 and the lowermost second opening is inserted into the lowermost first opening of the first pair of extrusion plates 14, the bottom surface of the telescopic plate 19 is in contact with the bottom surface of the separation tank 5, and the free end of the telescopic plate 19 is in contact with the bottom of the first pair of extrusion plates 14, the first and second air bags 18 are filled with gas, sealing the first and second openings, preferably, the length of the first opening is about 1 / 4 of the length of the first pair of extrusion plates 14, the length of the second opening is about 1 / 4 of the length of the second pair of extrusion plates 16, and the maximum telescopic distance of the telescopic plate 19 is greater than the length of the second opening, so as not to hinder the movement of the first pair of extrusion plates 14 to the middle of the separation tank 5; when the separation tank 5 is filled with a predetermined amount of channel silt, first and second exhaust valves are opened, and then the first and second linear actuators 15 and 17 are controlled to push the first and second pair of extrusion plates 14 and 16 to move closer to the middle of the separation tank 5, so that the cuboid structure formed by the first and second pair of extrusion plates 14 and 16 and the bottom of the separation tank 5 becomes smaller to extrude the channel silt, and the extruded sewage is discharged through the filter holes 20 and the screen holes 51, the linear actuators include but are not limited to telescopic cylinders and electric push rods, during the movement of the first and second pair of extrusion plates 14 and 16, the part of the first pair of extrusion plates 14 between the adjacent two first openings is inserted into the corresponding second opening of the second pair of extrusion plates 16 and extrudes the second air bag 18, the excess air in the second air bag 18 is discharged through the second exhaust valve, and the part of the second opening inside the first pair of extrusion plates 14 is sealed, at the same time, the part of the second pair of extrusion plates 16 between the adjacent two second openings is inserted into the corresponding first opening of the first pair of extrusion plates 14 and extrudes the first air bag, the excess air in the first air bag is discharged through the first exhaust valve, and the part of the first opening inside the second pair of extrusion plates 16 is sealed, and the telescopic plate 19 arranged at the bottom of the second pair of extrusion plates 16 is driven by the first pair of extrusion plates 14 to contract to the middle of the second pair of extrusion plates 16.When the channel silt is fully extruded, the silt discharge door 9 is opened, and the separated silt falls into the silt collecting box 7 through the silt discharge channel 8, and after the silt discharge is completed, the silt discharge door 9 is closed, and then the first linear driver 15 and the second linear driver 17 drive the pair of first extrusion plates 14 and the pair of second extrusion plates 16 to move to the left and right sides of the separation box 5, so that the pair of first extrusion plates 14 and the pair of second extrusion plates 16 are reset, and then the first air inlet valve and the second air inlet valve are used to inflate the first air bag and the second air bag 18 respectively, and the first opening and the second opening are sealed, waiting for the next extrusion operation.

[0032] In another embodiment, the port channel dredging device further comprises a second extrusion assembly arranged above the separation box 5 and opposite the inlet of the silt discharge channel 8, the second extrusion assembly comprising a third linear driver 21 fixedly arranged on the horizontal portion of the support frame 12, and an extrusion plate 22 horizontally arranged below the third linear driver 21 and fixedly connected with the output end of the third linear driver 21.

[0033] In this embodiment, the port channel dredging device further comprises a second extrusion assembly, which preferably comprises a third linear driver 21 and an extrusion plate 22, the extrusion plate 22 being opposite the inlet of the silt discharge channel 8 and cooperating with the cross section of the smallest cuboid structure enclosed by the pair of first extrusion plates 14 and the pair of second extrusion plates 16, when the pair of first extrusion plates 14 and the pair of second extrusion plates 16 move to the smallest cuboid structure, the extrusion plate 22 is pushed downward by the third linear driver 21 to extend into the smallest cuboid structure, and the channel silt is extruded twice to further improve the extrusion efficiency of the channel silt, after the extrusion is completed, the silt discharge door 9 is opened, and at the same time the extrusion plate 22 is pushed downward by the third linear driver 21 to push the separated silt to fall into the silt collecting box 7 through the silt discharge channel 8, after the silt discharge is completed, the silt discharge door 9 is closed, and then the extrusion plate 22 is reset by the third linear driver 21, waiting for the next extrusion operation.

[0034] In another embodiment, the silt discharge door 9 comprises two doors, the opposite sides of the two doors are respectively pivoted to the side walls of the silt discharge channel 8, at least two fourth linear drivers 23 are respectively fixedly arranged outside the silt discharge channel 8 and located on the same side as the pivoted side of the door, each fourth linear driver 23 is located below the door, and the output end of the fourth linear driver 23 is arranged to be able to extend into the silt discharge channel 8 and control the opening and closing of the silt discharge door 9.

[0035] In the embodiment, the dredging door 9 is provided with two doors which are pivotally connected with the side walls of the dredging channel 8, and at least two fourth linear drives 23 are arranged below the two doors to control the opening and closing of the dredging door 9 and provide support for the dredging door 9 when the dredging door 9 is closed.

[0036] In another embodiment, a support box 24 is fixedly arranged below the sewage collecting box 6, the support box 24 is fixedly arranged on the deck of the dredging ship 1, the front and rear sides of the support box 24 are open, and the sludge collecting box 7 is slidably arranged in the support box 24.

[0037] In the embodiment, the support box 24 is fixedly arranged below the sewage collecting box 6, which can provide support for the sewage collecting box 6 to reduce the stress on the support plate 11 and reduce the strength requirement of the support plate 11, and the support box 24 can also act as a shielding cover to prevent the sludge falling into the sludge collecting box from splashing to other positions on the deck, thereby improving the environmental cleanliness of the dredging operation.

[0038] In another embodiment, a limiting sliding groove is arranged on the bottom of the sludge collecting box 7, the limiting sliding groove is arranged along the front-rear direction of the sludge collecting box 7, and a limiting sliding rail 25 is arranged on the deck and matched with the limiting sliding groove.

[0039] In the embodiment, the limiting sliding groove is arranged on the bottom of the sludge collecting box 7, and the limiting sliding rail 25 is arranged on the deck, so as to facilitate the movement of the sludge collecting box 7 and reduce the labor intensity.

[0040] In another embodiment, an anchor rod (not shown) is fixedly arranged at the end of the limiting sliding rail 25, a mounting groove is arranged on the rear side wall of the sludge collecting box 7, a connecting plate (not shown) is hingedly arranged in the mounting groove, and an anchor hole is arranged on the connecting plate and matched with the anchor rod.

[0041] In the embodiment, the end of the limiting sliding rail 25 is located at the rear side of the support box 24, when the sludge collecting box 7 is moved along the limiting sliding rail 25 to the end of the limiting sliding rail 25, the sludge collecting box 7 is just located below the dredging channel 8, at this time, the connecting plate is rotated and connected with the anchor rod through the anchor hole, so as to fix the sludge collecting box 7 and avoid the sludge collecting box 7 moving randomly during the dredging process, thereby affecting the collection of sludge.

[0042] The number of devices and the scale of processing described herein are used to simplify the description of the present application. The application, modification and change of the port channel dredging device of the present application are obvious to those skilled in the art.

[0043] While embodiments of the application have been disclosed in connection with the above specification and drawings this description is not intended to limit the scope of the application and many modifications, enhancements, alternatives, and variations will become apparent to those skilled in the art from this disclosure. Accordingly, it is intended that the application not be limited to the described embodiments, but that it include all variations falling within the scope of the claims, and their equivalents.

Claims

1. A port channel dredging device, which is fixed on a dredging vessel and is characterized in that: include: A sludge suction pipe, one end of which is connected to the sludge suction head, and the other end of which is connected to at least two sludge discharge pipes, each of which is provided with a sludge discharge valve; At least two sludge separation assemblies are arranged in a one-to-one correspondence below the sludge discharge pipe, each sludge separation assembly includes a separation box, a sewage collection box, and a sludge collection box arranged in sequence from top to bottom, the separation box and the sewage collection box are connected through a sieve hole provided at the bottom of the separation box, and the separation box and the sludge collection box are connected through a sludge discharge channel provided through the sewage collection box and the bottom of the separation box, and a sludge discharge door is provided at the top of the sludge discharge channel; a drainage pipe, which is provided on the lower outer side of the sewage collection tank and communicates with the interior of the sewage collection tank, with both ends of the drainage pipe extending to both sides of the dredging vessel respectively; A first extrusion assembly includes a pair of first extrusion plates, which are arranged on the left and right sides of the separation box, each first extrusion plate is driven by a first linear drive arranged on the same side outside the separation box, and a plurality of first openings are provided on the front and rear sides of the first extrusion plate at equal intervals along its height direction, each first opening is arranged horizontally and connected to the outside, and a first air bag is provided on the upper and lower sides of each first opening along its length direction, and a first exhaust valve is provided on one end of the first air bag near the middle of the first extrusion plate, and a first air intake valve is provided on the other end; a pair of second extrusion plates, which are arranged on the front and rear sides of the separation box, each second extrusion plate is driven by a second linear drive arranged on the same side outside the separation box, and a plurality of second air bags are provided on the left and right sides of the second extrusion plate at equal intervals along its height direction. Opening, each second opening is arranged horizontally and connected to the outside, and second air bags are provided on the upper and lower sides of each second opening along its length direction, and a second exhaust valve is provided at one end of the second air bag close to the middle of the second extrusion plate, and a second air inlet valve is provided at the other end. The left and right sides of the bottom of the second extrusion plate are arranged to be telescopic plates, and the telescopic plates can be extended and retracted along the length direction of the second extrusion plate; wherein, the first opening and the second opening are staggered, and the adjacent ends of the first extrusion plate and the second extrusion plate are arranged to be plugged and engaged with each other through the first opening and the second opening, and the part of the first extrusion plate other than the first opening and the part of the second extrusion plate other than the second opening are both provided with a plurality of filter holes at intervals, and the entrance of the sludge discharge channel is arranged in the middle of the separation box.

2. The port channel dredging device according to claim 1, characterized in that: Also includes: A support assembly is fixedly mounted on the dredging boat and includes a support plate which is an inverted U-shaped plate. The horizontal plate of the support plate is penetrated by openings corresponding one to one with the sludge separation assembly. The separation box is fixedly mounted above the opening on the horizontal plate, and the sewage collection box is fixedly mounted below the opening on the horizontal plate. A support frame is an inverted U-shaped frame which is fixedly mounted on the support plate. A pipe clamp is fixedly mounted on the horizontal part of the support frame, and the sludge suction pipe is supported and fixed on the support frame by the pipe clamp.

3. The port channel desilting device according to claim 2, characterized in that: Also includes: The second extrusion assembly is arranged above the separation box and opposite to the entrance of the silt discharge channel. The second extrusion assembly includes a third linear drive, which is fixed on the horizontal part of the support frame, and an extrusion plate, which is horizontally arranged below the third linear drive and fixedly connected to its output end.

4. The port channel dredging device according to claim 3, characterized in that: The silt discharge door includes two doors, and the opposite sides of the two doors are pivotally connected to the side walls of the silt discharge channel respectively. At least two fourth linear drives are respectively fixed outside the silt discharge channel and are located on the same side as the pivotal side of the door. Each fourth linear drive is located below the door, and the output end of the fourth linear drive is configured to extend into the silt discharge channel and control the opening and closing of the silt discharge door.

5. The port channel desilting device according to claim 4, characterized in that: A support box is fixedly provided below the sewage collection box. The support box is fixedly provided on the deck of the dredging vessel. The front and rear sides of the support box are open. The sludge collection box is slidably provided in the support box.

6. The port channel desilting device according to claim 5, characterized in that: The bottom of the sludge collection box is provided with an upwardly concave limiting slide groove, and the limiting slide groove is arranged along the front and rear directions of the sludge collection box. The deck is provided with a limiting slide rail that cooperates with the limiting slide groove.

7. The port channel desilting device according to claim 6, characterized in that: A vertically upward anchor rod is fixed to the end of the limiting slide rail, and a mounting groove is provided on the rear side wall of the sludge collection box. A connecting plate is hinged in the mounting groove, and an anchor hole cooperating with the anchor rod is provided on the connecting plate.

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