CN108204003B - Ship with travelling step pile assembly - Google Patents

Abstract

The invention relates to a ship with a travel step pile assembly, which comprises a ship body and the travel step pile assembly, wherein the travel step pile assembly comprises a first travel step pile, a second travel step pile, a first travel device, a second travel device, a first lifting device and a second lifting device, the first travel step pile and the second travel step pile extend downwards from the ship body to extend into the water, the first travel device is connected with the first travel step pile, the second travel device is connected with the second travel step pile, the first travel device and the second travel device are used for driving the ship body to move relative to the first travel step pile and the second travel step pile along the travel direction, the first lifting device is connected with the first travel step pile, the second lifting device is connected with the second travel step pile, and the first lifting device and the second lifting device are respectively used for lifting the first travel step pile and the second travel step pile. The ship with the travelling step pile assembly has the advantages that the travelling step pile is inserted into the bottom of a river bed, so that the ship body is stabilized, and the ship can conveniently operate.

Description

Ship with travelling step pile assembly

Technical Field

The invention relates to the field of ships, in particular to a ship with a travelling step pile assembly.

Background

The river dredging is to remove the silt deposited at the bottom of the river through mechanical equipment, so as to play a role in dredging the river. At present, people generally adopt dredging ships to carry out river dredging, and the dredging modes of the existing dredging ships are numerous, such as bucket type, jet-suction type, mechanical cutter-suction type, hydraulic cutter-suction type, trailing suction type and the like. However, the existing dredging ship has the problem that vibration is large when dredging, so that the ship body jolts on the water surface, and dredging operation is affected.

Disclosure of Invention

Accordingly, the present invention is directed to a ship with a travel step pile assembly having a good hull stability.

To achieve the object of the present invention, an embodiment of the present invention provides a ship having a travel step pile assembly including a hull and a travel step pile assembly mounted on the hull, the travel step pile assembly including a first travel step pile, a second travel step pile, a first travel means, a second travel means, a first elevating means and a second elevating means, the first travel step pile and the second travel step pile extending downward from the hull to extend into the water, the first travel means being connected to the first travel step pile, the second travel means being connected to the second travel step pile, the first travel means and the second travel means being for driving the hull to move in a travel direction of the ship relative to the first travel step pile and the second travel step pile, the first elevating means being connected to the first travel step pile, the second elevating means being connected to the second travel step pile, the first elevating means and the second elevating means being for elevating the first travel step pile and the second travel step pile, respectively.

As a further improvement of the above embodiment, the first traveling device and the second traveling device each include a traveling carriage, a rail, and a carriage cylinder, the traveling carriage is movably disposed on the rail, one end of the carriage cylinder is fixed with respect to the rail, the other end is connected with the traveling carriage to drive the traveling carriage to move with respect to the rail, and the first traveling pile, the first lifting device, the second traveling pile, and the second lifting device are disposed on the traveling carriages of the first traveling device and the second traveling device, respectively.

As a further improvement of the above embodiment, the first lifting device includes a first lifting cylinder, the second lifting device includes a second lifting cylinder, the extending and retracting directions of the first lifting cylinder and the second lifting cylinder are respectively parallel to the axial directions of the first progressive pile and the second progressive pile, one end of the first lifting cylinder is connected to the first progressive pile, the other end is connected to the travelling trolley of the first travelling device, one end of the second lifting cylinder is connected to the second progressive pile, and the other end is connected to the travelling trolley of the second travelling device.

As a further improvement of the above embodiment, hydraulic pile clamps are provided on the first and second progressive piles, and the first and second progressive piles are connected to the ends of the first and second lift cylinders, respectively, through the hydraulic pile clamps.

As a further improvement of the above embodiment, the ship with the travelling step pile assembly further comprises a sludge milling and digging device connected with the ship body and used for collecting sludge on the ship body, wherein the sludge milling and digging device comprises a crawler support frame, a crawler, a rotating shaft, a driver and a plurality of milling and digging buckets, the crawler support frame is connected with the ship body and obliquely extends out of the ship body, the rotating shaft is rotatably connected with the crawler support frame, the crawler is movably connected with the crawler support frame and matched with the rotating shaft, the plurality of milling and digging buckets are connected with the crawler, the driver is connected with the rotating shaft and used for driving the rotating shaft to rotate, and the rotating shaft is used for driving the crawler to rotate on the crawler support frame.

As a further improvement of the above embodiment, the vessel with travelling step pile assembly further comprises a control module controlling the travelling speeds of the first travelling device and the second travelling device in dependence of the amount of sludge to be dredged and the dredging speed of the sludge milling and dredging device.

As a further improvement of the embodiment, the ship with the travelling step pile assembly further comprises a positioning module, a storage device and a sonar sounding instrument, wherein the positioning module is used for detecting the position of the ship, an electronic drawing is stored in the storage device, and the control module calculates the amount of mud to be dug according to the difference between the depth of water measured by the sonar sounding instrument and the milling depth required by the electronic drawing.

As a further improvement of the above embodiment, the ship with the travelling step pile assembly further comprises a crushing device, the crushing device is arranged on the ship body and used for crushing sludge conveyed to the ship body by the sludge milling device, the ship comprises a crusher and a crusher, the crusher is arranged below the crusher, the crusher comprises a crushing rotating shaft, a crushing motor and a plurality of crushing blades, the crushing motor is connected with the crushing rotating shaft to drive the crushing rotating shaft to rotate, the crushing blades are arranged on the crushing rotating shaft and are distributed along the axial direction of the crushing rotating shaft, the crusher comprises a crushing motor, a crushing rotating shaft, rotating blades, fixed blades and fixed blades, the crushing motor is connected with the crushing rotating shaft to drive the crushing rotating shaft to rotate, the rotating blades are fixed on the crushing rotating shaft, the rotating blades are mounted on the fixed blades, and the rotating blades are spaced by a preset distance from the fixed blades.

As a further improvement of the above embodiment, the ship with the travelling step pile assembly further comprises a dewatering device, wherein the dewatering device is arranged on the ship body and used for dewatering sludge conveyed to the ship body by the sludge milling device, the dewatering device comprises a centrifugal screen, a centrifugal screen rotating shaft, a filter screen, a spiral pushing plate and a dewatering motor, the dewatering device is provided with a feeding hole and a discharging hole, the centrifugal screen is connected with the centrifugal screen rotating shaft, the filter screen is cylindrical, is fixedly connected with the centrifugal screen and is in nested fit with the centrifugal screen, the spiral pushing plate is arranged in the filter screen and extends along the axial direction of the filter screen and is positioned between the feeding hole and the discharging hole, the dewatering motor is connected with the centrifugal screen rotating shaft and drives the centrifugal screen rotating shaft to rotate, and the centrifugal screen and the filter screen rotate relative to the spiral pushing plate.

As a further improvement of the above embodiment, the dewatering device further comprises a pushing shaft, the pushing shaft is arranged in the filter screen, the spiral pushing plate is arranged on the pushing shaft, the pushing shaft drives the spiral pushing plate to rotate in the same direction with the centrifugal screen and the filter screen, and the rotating speed of the spiral pushing plate is larger than that of the centrifugal screen and the filter screen.

According to the ship with the travelling step pile assembly, the travelling step pile assembly is arranged, so that the travelling step pile can be inserted into the bottom of a river bed, the ship body is stabilized, and the ship can conveniently operate.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intentionally drawn to scale on actual size or the like, with emphasis on illustrating the principles of the invention.

Fig. 1 is a schematic diagram of the front structure of a dredging vessel.

Fig. 2 is a top view of the dredging vessel.

Fig. 3 is a partial enlarged view of the dredging vessel.

Fig. 4 is an enlarged view of a portion of the silt milling apparatus.

Fig. 5 is a schematic structural view of the pulverizing apparatus.

Fig. 6 is a top view of the crusher.

Fig. 7 is a side view of the crusher.

Fig. 8 is a top view of the pulverizer.

Fig. 9 is a side view of the shredder.

Fig. 10 is a schematic structural view of the dehydration engine.

Fig. 11 is a partial enlarged view of the dehydrating apparatus.

Fig. 12 is another enlarged partial view of the dehydrating apparatus.

Fig. 13 is a schematic structural view of the traveling step pile assembly.

Fig. 14 is a top view of the travel step pile assembly.

Fig. 15 is an enlarged view of a portion of the travel step stake assembly.

Fig. 16 is a schematic structural view of the sludge conveying passage.

Detailed Description

In order that the invention may be understood more fully, the invention will be described with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 16, a ship having a travel step pile assembly is provided according to an embodiment of the present invention. In this embodiment, the ship with the travelling step pile assembly is a dredging ship, which comprises a ship body 1, a sludge milling and digging device 2, a crushing device 3, a dewatering device 4 and a sludge conveying channel 5. The smashing device 3, the dewatering device 4 and the mud conveying channel 5 are all arranged on the ship body 1, and the mud milling and digging device 2 is connected with the ship body 1. In particular, the silt milling apparatus 2 may be arranged at the bow, protruding forward from the hull 1 and into the water bottom. The stern may also be provided with a sludge transfer device 7 for transferring dewatered sludge to a sludge carrier working in connection with the dredging vessel. The silt milling and digging device 2, the crushing device 3 and the dewatering device 4 are sequentially connected through a silt conveying channel 5. The silt milling and digging device 2 can collect the silt of the water bottom onto the ship body 1 in a milling and digging mode, the crushing device 3 is used for crushing the silt collected by the silt milling and digging device 2, large garbage in the silt is crushed, the crushed silt is conveyed to the dehydration device 4 by the silt conveying channel 5, the dehydration device 4 is used for spin-drying and dehydrating the silt, and water is discharged out of the ship body 1, so that the weight of the silt is greatly reduced, and the workload of a follow-up silt carrying ship is reduced. The hull 1 may also be provided with a cockpit 11, in which cockpit 11 an operator can maneuver the dredging vessel. The hull 1 is also provided with a power system composed of a propeller, an engine and the like, and the description is omitted here.

Referring to fig. 3 and 4, the silt milling apparatus 2 includes a track support frame 21, a track 22, a rotating shaft 24, a driver 25, and a plurality of milling buckets 23. The crawler support frames 21 are connected with the ship body 1, extend obliquely out of the ship body 1 and extend into the water bottom. Specifically, the crawler support frames 21 have a substantially rectangular parallelepiped shape, and one end (second end) of the long side thereof extends into the water bottom, and the other end (first end) of the long side is located on the hull 1. The rotating shaft 24 is rotatably connected to the track support frame 21. The crawler 22 is movably connected to the crawler support 21 along the length direction of the crawler support 21 and is matched with the rotating shaft 24, and the crawler 22 circularly rotates on the crawler support 21 along with the rotation of the rotating shaft 24, and is embodied on the outer surface of one long side of the crawler support 21, so that the crawler 22 translates on the outer surface of the crawler support 21. The plurality of milling buckets 23 are connected with the crawler 22, and move on the crawler support frame 21 under the drive of the crawler 22, and the bucket opening of the milling buckets 23 faces the same direction as the movement direction of the crawler 22. When the milling bucket 23 moves to one end of the track support frame 21 extending into the water bottom along with the track 22, the silt at the water bottom is dug up, then the silt is moved to one end of the track support frame 21 located on the ship under the drive of the track 22, the silt is poured into the feed hopper 31 of the crushing device 3, the silt continues to move towards the one end of the track support frame 21 extending into the water bottom, the milling buckets 23 are circularly reciprocated in this way, and the dredging efficiency is higher. The number of milling hoppers 23 is set as required, typically between 15 and 30. The driver 25 is connected with the rotating shaft 24, and is used for driving the rotating shaft 24 to rotate, and the rotating shaft 24 is used for driving the crawler 22 to rotate on the crawler support frame 21. In this embodiment, two ends of the track support 21 are respectively provided with a rotating shaft 24, and each rotating shaft 24 may be connected to one driver 25, or only one rotating shaft 24 may be connected to the driver 25. The track support 21 has a bottom surface 212 and a top surface 211, wherein the bottom surface 212 faces the water surface and the hull 1, and the long side faces downward, and the top surface 212 faces the bottom surface, and the long side faces upward. In the preferred embodiment, the tracks 22 and the milling buckets 23 on the top surface 211 of the track support 21 move from the second end to the first end of the track support 21, and the tracks 22 and the milling buckets 23 on the bottom surface 212 move from the first end to the second end of the track support 21. Because the track support 21 is inclined in a front-low back-high manner, the bucket openings of the milling buckets 23 are upward when the milling buckets are moved on the track support 21 after the mud is dredged, so that more mud can be contained, and the flatness of the river bed can be ensured. In a further preferred embodiment, the shaft 24 is a square shaft and the drive 25 is a hydraulic motor. The square shaft may better mate with the track 22. Moreover, the square shaft is used as the rotating shaft 24, and even if the square shaft is worn to a certain extent, the crawler belt 22 can still be driven to rotate, so that the service life of the silt milling and digging device 2 is longer. The traditional dredging ship usually uses equipment such as an excavator and a grab bucket to dredge, but when the grab bucket is turned up, a lot of sludge always falls back to the river bottom, the dredging is not clean, and circular pits are easily dug out at the river bottom, so that the bottom of the river bed is uneven. By adopting the milling-digging type silt milling-digging device 2 of the embodiment, the silt at the bottom of the river can be cleared up, and the bottom of the river can be kept flat.

In a further preferred embodiment, the track support 21 is located at a first end on the hull 1 and at a second end remote from the hull 1 and below the hull 1, extending into the water bottom, the track support 21 being rotatably connected to the hull 1. Specifically, the track support 21 may be hinged to the hull 1 by a rotation shaft, the axial direction of which is perpendicular to the travelling direction of the hull 1, near the first end. The silt milling and digging device 2 further comprises a milling and digging adjusting oil cylinder 26, wherein a first end of the milling and digging adjusting oil cylinder 26 is hinged to the ship body 1, a second end of the milling and digging adjusting oil cylinder 26 is connected to the crawler support frame 21, and a second end of the milling and digging adjusting oil cylinder 26, which is close to the second end (one end extending into the water bottom) of the crawler support frame 21 relative to the joint of the crawler support frame 21 and the ship body 1, so that three vertexes of a triangle are formed by the first end, the second end and the hinging point of the crawler support frame 21 and the ship body 1, and the milling and digging adjusting oil cylinder 26 is one side of the triangle. When the milling depth is required to be adjusted, the telescopic length of the milling and digging adjusting oil cylinder 26 is only required to be adjusted, the shorter the length of the milling and digging adjusting oil cylinder 26 is, the larger the inclination angle of the crawler support frame 21 relative to the water surface is, the deeper the second end of the crawler support frame 21 stretches into the water, so that the milling depth is deeper, and conversely, the longer the length of the milling and digging adjusting oil cylinder 26 is, the shallower the second end of the crawler support frame 21 stretches into the water, and the shallower the milling and digging depth is. When the dredging vessel completes dredging operation, the milling and dredging adjusting oil cylinder 26 extends to a longer length, so that the second end of the crawler support frame 21 is not contacted with the water bottom, and the dredging vessel can conveniently navigate.

In a preferred embodiment, the dredging vessel further comprises a positioning module, a control module and a storage device (not shown), wherein the positioning module, the storage device and the milling and digging adjusting oil cylinder 26 are connected with the control module, the positioning module is used for detecting the position of the dredging vessel, an electronic drawing is stored in the storage device, and the control module controls the length of the milling and digging adjusting oil cylinder 26 according to the position of the dredging vessel and the electronic drawing. Specifically, the positioning module may be a GPS positioning module, a GSM positioning module, etc., the control module may be a Programmable Logic Controller (PLC), a single chip microcomputer, etc., and the storage device may be a built-in memory of the dredging ship, or may be an external memory of a usb disk, etc. The electronic drawing can be provided by a ladle issuing party of dredging engineering, and comprises construction parameters such as a construction range, a water bottom appearance, a reference height, milling and digging depths of all positions and the like. During construction, the control module automatically controls the length of the milling and digging adjusting oil cylinder 26 according to the parameter requirements in the electronic drawing and the position of the dredging ship, so that the milling and digging depth of the silt milling and digging device 2 is adjusted. The control mode can effectively control the quasi-point and ensure the milling and digging elevation.

Referring to fig. 4, in a further preferred embodiment, the silt milling apparatus 2 further comprises a hydraulic telescopic adjuster 27, wherein the hydraulic telescopic adjuster 27 is arranged on the track support frame 21 and cooperates with the track 22 for adjusting the tension of the track 22. Specifically, the hydraulic expansion/contraction adjuster 27 is provided near the second end of the track frame 21, and when the silt milling apparatus 2 is used for a long time, the track 22 is easily loosened on the track frame 21, and at this time, the length of the hydraulic expansion/contraction adjuster 27 is increased to lift the track 22, thereby increasing the tension of the track 22.

Referring to fig. 3 to 9, the crushing apparatus 3 includes a crusher 32 and a crusher 33, and the crusher 33 is disposed below the crusher 32. The crusher 32 is used for coarse crushing of garbage, stones and the like in the sludge, the crusher 33 is used for fine crushing of the garbage after coarse crushing, and the garbage and stones after fine crushing are turned into powder and conveyed to the dewatering device 4 at the rear together with the sludge. The crushing device 3 further comprises a feed hopper 31, an outer frame 35 and a discharge hopper 34, wherein the feed hopper 31 is arranged at the output end of the silt milling and digging device 2, namely the first end of the crawler support frame 21, and is used for guiding silt collected by the silt milling and digging device 2 into the crushing device 3. The crusher 32 and the crusher 33 are mounted in the outer frame 35, the crusher 32 is located below the feed hopper 31, the discharge hopper 34 is located below the crusher 33 and connected to the sludge conveying pipe 51 of the sludge conveying channel 5 for conveying the sludge crushed by the crusher 33 into the sludge conveying pipe 51.

Referring to fig. 6 and 7, the crusher 32 includes a crushing shaft 321, a crushing motor 323, and a plurality of crushing blades 322. The crushing motor 323 is connected with the crushing rotating shaft 321 to drive the crushing rotating shaft 321 to rotate. The crushing rotary shaft 321 and the crushing blade 322 are provided in the outer frame 35, and the crushing motor 323 is provided outside the outer frame 35. The crushing blades 322 are disposed on the crushing shaft 321 and are distributed along the axial direction of the crushing shaft 321, and a certain distance may be provided between the crushing blades 322. Crushing blade 322 is a high strength alloy blade. In this embodiment, the crusher 32 comprises two parallel arranged crushing spindles 321, each crushing spindle 321 being connected to a crushing motor 323. A plurality of crushing blades 322 are arranged on each crushing rotating shaft 321, and the crushing blades 322 on the two crushing rotating shafts 321 are staggered. When the sludge passes through the crusher 32, the crushing blades 322 rotated at high speed by the crushing shaft 321 pulverize stones, iron garbage, wooden garbage, plastic garbage, and the like in the sludge into small pieces.

Referring to fig. 8 and 9, the shredder 33 includes a shredder motor 336, a shredder shaft 331, a rotary cutter holder 332, a rotary cutter 333, a fixed cutter holder 334, and a fixed cutter 335. The crushing rotating shaft 331, the rotating tool apron 332, the rotating tool 333, the fixed tool apron 334 and the fixed tool 335 are all installed in the outer frame 35, and the crushing motor 336 is installed outside the outer frame 35. The pulverizing motor 336 is connected with the pulverizing shaft 331 to drive the pulverizing shaft 331 to rotate. The rotary blade holder 332 is fixed to the pulverizing shaft 331, and the rotary blade 333 is mounted to the rotary blade holder 332 by bolts. The fixed blade holder 334 is fixed on the inner wall of the outer frame 35, and the fixed blade 335 is mounted on the fixed blade holder 334 by bolts. The rotating blade holder 332 is spaced a predetermined distance from the fixed blade holder 334. The fixed blade 335 and the rotating blade 333 are both high strength alloy blades, and when the rotating blade 333 rotates to be opposite to the fixed blade 335, a small amount of clearance is provided between the two. The crusher 33 further has a crushing hopper and a crushing discharge hopper, the crushing hopper being located below the crusher 32, and the crushing shaft 331, the rotary blade holder 332, the rotary blade 333, the fixed blade holder 334 and the fixed blade 335 being located between the crushing hopper and the crushing discharge hopper. The shredder discharge hopper is located above the discharge hopper 34. The pulverizing motor 336 may have a higher rotational speed than the pulverizing motor 323. When the sludge coarsely crushed by the crusher 32 enters the crusher 33 from the crushing hopper, the small stone and garbage in the sludge are crushed into powder by the rotating cutter 333 rotating at a high speed through the gap between the rotating cutter 333 and the fixed cutter 335.

In a further preferred embodiment, the fixed tool holder 334 includes a first fixed tool holder 3341 and a second fixed tool holder 3342, and the first fixed tool holder 3341 and the second fixed tool holder 3342 are respectively located at two sides of the crushing rotating shaft 331 and spaced apart by a predetermined distance. The first fixed tool holder 3341 and the second fixed tool holder 3342 are each provided with a fixed tool 335. The rotary tool holder 332 includes a first rotary tool holder 3321 and a second rotary tool holder 3322, and the first rotary tool holder 3321 and the second rotary tool holder 3322 are respectively fixed on opposite sides of the crushing rotary shaft 331 and are located on substantially the same diameter of the cross section of the crushing rotary shaft 331. The first rotary tool holder 3321 and the second rotary tool holder 3322 are each provided with a rotary tool 333. Through setting up two sets of rotating tool 333 and fixed tool 335, make partial silt can be brought up by high-speed pivoted rotating blade holder 332, through twice or even cubic fine crushing, crushing effect is better.

In a further preferred embodiment, the surfaces of the first fixed blade holder 3341 and the second fixed blade holder 3342 facing the crushing shaft 331 are arc-shaped and located on the same circumference with the crushing shaft 331 as the center, a crushing feed port 337 is formed between the upper ends of the first fixed blade holder 3341 and the second fixed blade holder 3342, and a crushing discharge port 338 is formed between the lower ends of the first fixed blade holder 3341 and the second fixed blade holder 3342. The fixed cutter 335 is installed at the upper end of the first fixed cutter holder 3341, and the fixed cutter 335 is installed at the lower end of the second fixed cutter holder 3342. The silt flows in from smashing the feed inlet 337, is smashed for the first time by fixed cutter 335 and the rotation cutter 335 on the first fixed cutter holder 3341, and part of the silt after smashing flows out from smashing the discharge outlet 338, and part of the silt still does not flow out, is brought to the lower end of the second fixed cutter holder 3342 by the rotation cutter 332, is smashed for the second time by the fixed cutter 335 on the second fixed cutter holder 3342, then rotates along with the rotation cutter holder 332, is smashed for the third time by the fixed cutter 335 on the first fixed cutter holder 3341 again, finally flows out from smashing the discharge outlet 338, and is smashed for the third time, and the smashing effect is better.

In a further preferred embodiment, the length of the face of the first fixed blade holder 3341 facing the crushing shaft 331 is less than 1/4 of the circumference, the length of the face of the second fixed blade holder 3342 facing the crushing shaft 331 is less than or equal to 1/4 of the circumference, and the spacing between the upper ends of the first fixed blade holder 3341 and the second fixed blade holder 3342 is less than the spacing between the lower ends of the first fixed blade holder 3341 and the second fixed blade holder 3342, i.e. the width of the crushing feed opening 337 is less than the width of the crushing discharge opening 338. In the present embodiment, from the perspective of fig. 9, the first fixed blade holder 3341 is located at the left side of the crushing shaft 331, and the second fixed blade holder 3342 is located at the right side of the crushing shaft 331, and the crushing shaft 331 rotates counterclockwise.

Referring to fig. 10 to 12, the dewatering apparatus 4 includes a centrifugal screen 41, a centrifugal screen rotating shaft 42, a filter screen 43, a screw pushing plate 44, and a dewatering motor (not shown). The dehydrating apparatus 4 is provided with a feed port 461 and a discharge port 411. The centrifugal screen 41 is connected to a centrifugal screen rotation shaft 42, and rotates around the centrifugal screen rotation shaft 42. The centrifugal screen 41 is generally in a cylindrical structure, and the outer frame of the centrifugal screen 41 is in a hollow structure, for example, a structure formed by connecting frame strips, or a structure that a plurality of holes are formed in a cylinder, so that water can pass through the centrifugal screen 41 and leave the dewatering device 4. The filter screen 43 is cylindrical and is fixedly connected to the inner wall or the outer wall of the centrifugal screen 41, and is in nested fit with the centrifugal screen 41. In this embodiment, the filter screen 43 is fixed on the inner wall of the centrifugal screen 41, the shape of the filter screen 43 is matched with the shape of the inner wall of the centrifugal screen 41, and two ends of the filter screen are respectively fixed on the inner wall of the centrifugal screen 41 through the filter screen fixing rings 413. The spiral pushing plate 44 is in a spiral shape, is arranged in the centrifugal screen 41 and the filter screen 43, extends along the axial direction of the filter screen 43, is positioned between the feed inlet 461 and the discharge outlet 411, and is used for pushing sludge in the filter screen 43 from the feed inlet 461 to the discharge outlet 411. When the dewatering device 4 works, sludge mixed with a large amount of water enters the centrifugal screen 41 from the feed inlet 461, the dewatering motor is connected with the centrifugal screen rotating shaft 42 to drive the centrifugal screen rotating shaft 42 to rotate, the centrifugal screen rotating shaft 42 drives the centrifugal screen 41 and the filter screen 43 to rotate, the sludge in the centrifugal screen 41 is acted by centrifugal force when rotating, the water in the sludge passes through the filter screen 43 and the side wall of the centrifugal screen 41 and is discharged to the outside of the dewatering device 4, the spiral pushing plate 44 rotates relative to the centrifugal screen 41 and the filter screen 43, the dewatered sludge in the centrifugal screen 41 and the filter screen 43 is pushed to the direction of the discharge outlet 411, and the dewatered sludge leaves the dewatering device 4 from the discharge outlet 411. A water tank may be provided below the dewatering device 4 for collecting water discharged from the side walls of the centrifugal screen 41 and the filter screen 43, and a sludge storage tank may be provided at the rear end of the dewatering device 4 for receiving dewatered sludge discharged from the discharge port 411. The rear end of the dewatering device 4 can be provided with a conveyor belt 7 for conveying dewatered sludge to a dredger cooperating with the dredging vessel.

In a further preferred embodiment, the dewatering device 4 further comprises a pushing shaft 45, wherein the pushing shaft 45 is disposed in the filter screen 43, and a spiral pushing plate 44 is fixedly disposed on an outer surface of the pushing shaft 45, and extends spirally around the pushing shaft 45. The pushing shaft 45 drives the spiral pushing plate 44 to rotate in the same direction with the centrifugal screen 41 and the filter screen 43, and the rotating speed of the spiral pushing plate 44 is greater than that of the centrifugal screen 41 and the filter screen 43. The pushing shaft 45 may be disposed coaxially with the centrifugal screen rotation shaft 42. The pushing shaft 45 can be in transmission connection with other independent motors, and can also be in transmission connection with a dewatering motor. Since the rotation speed of the screw 44 is greater than the rotation speed of the centrifugal screen 41 and the filter screen 43, the screw 44 pushes the sludge forward to the discharge port 411.

In a further preferred embodiment, a first centrifugal screen pulley 423 and a second centrifugal screen pulley 424 are provided on the centrifugal screen rotation shaft 42. The first and second centrifugal screen pulleys 423 and 424 may be fixedly provided at both ends of the centrifugal screen rotation shaft 42, respectively, and located outside both ends of the centrifugal screen 41. The dewatering device 4 further comprises a differential mechanism 47, a pushing belt pulley 451 is arranged on the pushing shaft 45, the first centrifugal screen belt pulley 423 is in transmission connection with the dewatering motor, the second centrifugal screen belt pulley 424 is in transmission connection with the pushing belt pulley 451 through the differential mechanism 47, and the rotating speed of the pushing belt pulley 451 is larger than that of the second centrifugal screen belt pulley 424. Specifically, the first centrifugal screen pulley 423 is connected with the dewatering motor through a belt, and the first centrifugal screen pulley 423 drives the centrifugal screen rotating shaft 42 and the second centrifugal screen pulley 424 arranged on the centrifugal screen rotating shaft to rotate under the driving of the dewatering motor, and the second centrifugal screen pulley 424 and the pushing pulley 451 are in transmission connection through the differential 47, so that the pushing pulley 451 rotates under the driving of the second centrifugal screen pulley 424 and the rotating speed is greater than that of the second centrifugal screen pulley 424. In this embodiment, only one dewatering motor is required to meet the driving requirement of the dewatering device 4.

In a further preferred embodiment, differential 47 includes first differential wheel 471 and second differential wheel 472 coaxially disposed, second centrifugal screen pulley 424 is in belt driven connection with first differential wheel 471, and second differential wheel 471 is in belt driven connection with push pulley 451. The transmission ratio of the second differential gear 472 to the pushing pulley 451 is greater than the transmission ratio of the first differential gear 471 to the second centrifugal screen pulley 424, so that the rotational speed of the pushing pulley 451 is greater than the rotational speed of the second centrifugal screen pulley 424. In particular, the transmission ratio between the pulley and the differential can be adjusted by adjusting the tread between the two.

In a further preferred embodiment, the centrifugal screen rotation shaft 42 includes a first half shaft 421 and a second half shaft 422 coaxially disposed, and the first half shaft 421 and the second half shaft 422 are independent of each other (not connected to each other) and fixedly connected to both ends of the centrifugal screen 41, respectively. A first centrifugal screen pulley 423 is disposed on the first half shaft 421 and a second centrifugal screen pulley 424 is disposed on the second half shaft 422. The first half shaft 421 and the second half shaft 422 are hollow shafts, and the pushing shaft 45 coaxially penetrates through the second half shaft 422, extends into the centrifugal screen 41 and extends towards the first half shaft 421, and a certain distance is reserved between one end of the pushing shaft 45, which faces the first half shaft 421, and the first half shaft 421. The ejector shaft 45 may rotate in the second half shaft 422 relative to the second half shaft 422.

In a preferred embodiment, the dewatering apparatus 4 further comprises a stationary tube shaft 46, the stationary tube shaft 46 passing through the centrifugal screen 41 and the screen 43 in the axial direction of the centrifugal screen 41, the centrifugal screen rotation shaft 42 and the pushing shaft 44 being rotatably nested outside the stationary tube shaft 46. One end of the fixed tube shaft 46 is hollow and extends towards the middle of the fixed tube shaft 46 to form a hollow section, the hollow end (namely the end of the hollow end) of the fixed tube shaft 46 is communicated with the crushing device 3 through the mud conveying channel 5, a feed inlet 461 is formed in the hollow section of the fixed tube shaft 46, and the feed inlet 461 is positioned in the centrifugal screen 41. The dewatering device 4 may further comprise a mounting bracket 40, and both ends of the stationary tube shaft 46 are fixed to the mounting bracket 40 and suspended. The sludge crushed by the crushing device 3 is conveyed to the hollow section of the fixed pipe shaft 46 through the sludge conveying passage 5, and then flows out from the feed port 461 to the centrifugal screen 41. The discharge opening 411 of the dewatering device 4 is arranged at one end of the centrifugal screen 41 away from the feed opening 461.

In a further preferred embodiment, the centrifugal screen 41 has an inlet end close to the feed opening 461 and an outlet end opposite to the inlet end (i.e. the end remote from the feed opening 461), the inlet end of the centrifugal screen 41 being fixedly provided with a conical cylinder 412, the conical cylinder 412 being arranged coaxially with the centrifugal screen rotation axis 42. The fixed tube shaft 46 passes through the tapered barrel 412, and the feed port 461 is located in the tapered barrel 412. The inner diameter of the end of the cone 412 near the inlet end of the centrifugal screen 41 is smaller than the inner diameter of the end near the outlet end of the centrifugal screen 41, that is, the flare (larger inner diameter end) of the cone 412 faces the outlet end of the centrifugal screen 41, so that when the cone 412 rotates with the centrifugal screen 41, a thrust force toward the outlet end of the centrifugal screen 41 can be generated against the sludge rushed in from the feed port 461, facilitating the dewatering operation.

Referring to fig. 1, 13 to 15, in a preferred embodiment, the dredging vessel further comprises a travelling step pile assembly 6 mounted on the hull 1, the travelling step pile assembly comprising a first travelling step pile 61, a second travelling step pile 64, a first travelling means 63, a second travelling means 66, a first lifting means 62 and a second lifting means 65. The first row of progressive piles 61 and the second row of progressive piles 64 extend downwardly from the hull 1 to extend underwater, and the axial direction of the first row of progressive piles 61 and the second row of progressive piles 64 is substantially perpendicular to the water surface. The first travelling device 63 is connected to the first travelling pile 61 and the second travelling device 66 is connected to the second travelling pile 64, the first travelling device 63 and the second travelling device 66 being adapted to drive the hull 1 to move in the travelling direction of the dredging vessel relative to the first travelling pile 61 and the second travelling pile 62. The first elevating device 62 is connected to the first row of progressive piles 61, the second elevating device 65 is connected to the second row of progressive piles 64, and the first elevating device 62 and the second elevating device 65 are respectively used to elevate the first row of progressive piles 61 and the second row of progressive piles 64. When the dredging vessel is to move in the dredging process, the first advancing pile 61 and the second advancing pile 64 are firstly lowered through the first lifting device 62 and the second lifting device 65, the first advancing pile 61 and the second advancing pile 64 are inserted into the bottom of a river bed to be positioned, then the first travelling device 63 and the second travelling device 66 can jointly drive the ship body 1 to move forwards relative to the first advancing pile 61 and the second advancing pile 62, when the dredging vessel walks to the limit of the travel of the first travelling device 63 and the second travelling device 66, the first lifting device 62 and the second lifting device 65 lift the first advancing pile 61 and the second advancing pile 64, the bottom ends of the first advancing pile 61 and the second advancing pile 64 leave the river bed, the first travelling device 63 and the second travelling device 66 are reset, and then the first advancing pile 61 and the second advancing pile 64 are lowered again, so the dredging vessel can move forwards in a circulating way. Conversely, by adjusting the control commands of the first running gear 63 and the second running gear 66, the dredging vessel can be moved backward.

In a further preferred embodiment, the first running gear 63 and the second running gear 66 each comprise a running carriage 631/661, a rail 632/662 and a carriage cylinder 633/663, the rail 632/662 being fixed to the hull 1, the running carriage 631/661 being movably arranged on the rail 632/662, one end of the carriage cylinder 633/663 being fixed relative to the rail 632/662, e.g. connected to the hull 1, and the other end being connected to the running carriage 631/661 for driving the running carriage 631/661 to move relative to the rail 632/662. The controller of the dredging ship controls the expansion and contraction of the trolley oil cylinders 633/663 through a hydraulic pipeline. The first traveling pile 61, the first elevating device 62, the second traveling pile 64, and the second elevating device 65 are provided on traveling carriages 631/661 of the first traveling device 63 and the second traveling device 66, respectively. The traveling carriage 661 is provided with a plurality of rollers 6611, and the rollers 6611 can roll on the rails 662, thereby moving the traveling carriage 661 relative to the rails 662. The traveling carriage 631 is also provided with a plurality of rollers. When the dredging vessel moves forward, the trolley cylinders 633/663 are retracted to the shortest position, the first row of progressive piles 61 and the second row of progressive piles 64 are inserted into the bottom of the river bed to be positioned, and then the trolley cylinders 633/663 are extended simultaneously, and since the first row of progressive piles 61 and the second row of progressive piles 64 are fixed, the traveling trolley 631/661 applies a reaction force to the trolley cylinders 633/663, thereby pushing the hull 1 to move forward. When the trolley cylinders 633/663 are extended to the longest position, the first row of progressive piles 61 and the second row of progressive piles 64 are lifted, and then the trolley cylinders 633/663 are retracted again to the shortest position, inserting the first row of progressive piles 61 and the second row of progressive piles 64 into the bottom of the river bed for positioning. So as to reciprocate the hull 1 continuously forward as required. If the ship body 1 is required to move backward, the trolley cylinders 633/663 are extended to the longest position, then the first row of progressive piles 61 and the second row of progressive piles 64 are inserted into the bottom of the river bed to be positioned, and then the trolley cylinders 633/663 are synchronously shortened to move the ship body 1 backward.

In a further preferred embodiment, the first lifting device 62 comprises a first lifting cylinder and the second lifting device 65 comprises a second lifting cylinder, the telescopic directions of which are respectively parallel to the axial directions of the first row of progressive piles 61 and the second row of progressive piles 64, i.e. the first lifting cylinder and the second lifting cylinder are telescopic in the up-down direction. One end of the first lift cylinder is connected to the top end of the first traveling pile 61, the other end is connected to the traveling carriage 631 of the first traveling device 63, one end of the second lift cylinder is connected to the top end of the second traveling pile 64, and the other end is connected to the traveling carriage 661 of the second traveling device 66. When the first lift cylinder and the second lift cylinder extend, the first row progressive pile 61 and the second row progressive pile 64 rise, and when the first lift cylinder and the second lift cylinder shorten, the first row progressive pile 61 and the second row progressive pile 64 fall. The controller of the dredging ship controls the expansion and contraction of the first lifting oil cylinder and the second lifting oil cylinder through the hydraulic pipeline.

In a further preferred embodiment, hydraulic pile clamps 611/641 are provided on both the first and second rows of progressive piles 61 and 64, the hydraulic pile clamps 611/641 being connected to the top ends of the first and second lift cylinders, respectively, and clamping the first and second rows of progressive piles 61 and 64, respectively, so that the first and second rows of progressive piles 61 and 64 are connected to the ends of the first and second lift cylinders.

In a further preferred embodiment, the dredging vessel further comprises a control module controlling the travelling speed of the first travelling device 63 and the second travelling device 66 in dependence of the amount of sludge to be dredged and the dredging speed. Specifically, the control module can be a Programmable Logic Controller (PLC), a single chip microcomputer or the like, and can determine construction parameters such as the shape of the water bottom in front of the dredging ship and the milling depth according to the position of the dredging ship determined by the electronic drawing and the positioning module, so as to calculate the amount of the to-be-dredged mud (namely the amount of mud) in the period, and can set a sonar sounding instrument at the bow, and calculate the amount of the to-be-dredged mud as a correction mode according to the difference between the depth of water measured by the sonar sounding instrument and the milling depth required by the electronic drawing. The dredging speed can be obtained through testing before delivery, or a flow detection device (such as a flowmeter) can be arranged at the front end of the mud conveying channel 5 to detect the flow of the mud conveying channel 5 in unit time so as to obtain the dredging speed. The traveling speeds of the first traveling device 63 and the second traveling device 66 may correspond to the telescopic speeds of the carriage cylinders 633/663, and may be inversely proportional to the amount of the sludge to be dredged. In the case where the dredge speed is constant, the greater the amount of dredged material at a certain position, the slower the traveling speeds of the first traveling device 63 and the second traveling device 66, and vice versa.

Referring to fig. 2 and 16, in a preferred embodiment, the dredging vessel further comprises a chemical tank 12/13 and a chemical tank 16 provided on the hull 1, and the chemical tank 12/13 is connected to the chemical tank 16. A mud pump 52 is arranged in the mud conveying passage 5, and the mud pump 52 is positioned between the crushing device 3 and the dewatering device 4 and is used for pumping the crushed mud of the crushing device 3 to the dewatering device 4. The chemical cabin 12/13 is connected with a mud pump 52 or connected with a mud conveying pipeline 51 between the mud pump 52 and the crushing device 3, and is used for adding chemicals such as flocculating agent and/or sterilizing agent into the mud to cause the mud to undergo flocculation reaction so as to facilitate the dehydration of the subsequent dehydration device 4. The medicament reservoir 16 contains a quantity of medicament for supplying the respective medicament to the medicament compartment 12/13. Since the chemical tank 12/13 is connected to the mud pump 52 or to the mud pipe 51 between the mud pump 52 and the crushing device 3, the mud to which the flocculant and/or the sterilizing agent is added is rotated at a high speed while passing through the mud pump 52, so that the flocculant and/or the sterilizing agent is more uniformly dispersed in the mud. In this embodiment, the agent tanks 12/13 are connected to the mud pump 52 by piping.

In a further preferred embodiment, the mud conveying passage 5 further comprises a first mud compartment 53 and a second mud compartment 54, the first mud compartment 53 being located between the mud pump 52 and the crushing device 3, and the second mud compartment 54 being located between the mud pump 52 and the dewatering device 4. The cross-sectional dimensions of the first and second mud tanks 53 and 54 are larger than the pipe diameter of the mud conveying pipe 51, so that the mud in the mud conveying pipe 51 is accumulated and stays in the first and second mud tanks 53 and 54 for a while, thereby preventing the suction phenomenon of the mud pump 52.

In a further preferred embodiment, the sludge conveying passage 5 further comprises a first swirling mechanism 55 and a second swirling mechanism 56, the first swirling mechanism 55 and the second swirling mechanism 56 being arranged in the sludge conveying pipe 51 between the sludge pump 52 and the dewatering device 4 for swirling the sludge in the sludge conveying pipe 51, and the swirling directions of the first swirling mechanism 55 and the second swirling mechanism 56 being opposite. The first swirling mechanism 55 and the second swirling mechanism 56 may be helical guide plates provided in the sludge conveying pipe 51, and the helical directions of the two are opposite, and swirling of the sludge is caused by the helical guide plates. The mud pipe 51 may be bent in the hull 1 a plurality of times, and the first and second swirling mechanisms 55 and 56 are provided at the bent portions of the mud pipe 51. By swirling the first and second swirling means 55, 56 in opposite directions, the sludge can be more evenly mixed with the flocculant and/or sterilant added thereto.

In a further preferred embodiment, the sludge conveying passage 5 further comprises a third swirling mechanism 57, the first swirling mechanism 55, the second swirling mechanism 56 and the third swirling mechanism 57 being arranged between the sludge pump 52 and the dewatering device 4 in sequence, i.e. after the sludge is pumped out of the sludge pump 52, the sludge passes through the first swirling mechanism 55, the second swirling mechanism 56 and the third swirling mechanism 57 in sequence and then enters the dewatering device 4. The swirling directions of the first swirling mechanism 55 and the third swirling mechanism 57 are the same, i.e., the swirling direction of the second swirling mechanism 56 is opposite to the swirling direction of the third swirling mechanism 57. This arrangement allows the sludge to be swirled in two opposite directions, which allows the sludge to be more evenly mixed with the flocculant and/or sterilant added thereto.

In a preferred embodiment, the medicament compartment comprises a first sub-medicament compartment 12, a second sub-medicament compartment 13 and a medicament pump 14, the first sub-medicament compartment 12 and the second sub-medicament compartment 13 being in cyclic communication via a connecting channel 58, the medicament pump 14 being arranged at the connecting channel 58 between the first sub-medicament compartment 12 and the second sub-medicament compartment 13 for delivering medicament such that medicament may circulate between the first sub-medicament compartment 12 and the second sub-medicament compartment 13. Specifically, the first sub-tank 12 may be a flocculant tank and the second sub-tank 13 may be a sterilant tank. The first sub-agent compartment 12 and the mud pump 52 (or the mud delivery pipe 51 between the mud pump 52 and the pulverizing device 3) may also be connected by a connection channel 58, and a control valve (not shown) is provided on the connection channel 58. In the prior art, to add flocculant into sludge, a special flocculant preparation cabin is required to be arranged on a ship, the flocculant is prepared by adopting a traditional stirring mode, the time is long and is generally more than 1 hour, and if the amount of sludge in dredging river is large, a large-volume container is required to store the prepared flocculant, so that the space of the ship body 1 is occupied relatively. In the present embodiment, before the control valve is opened to deliver the chemical to the mud pump 52, the chemical is circulated at a high speed between the first sub-chemical tank 12 and the second sub-chemical tank 13, the preparation of the chemical such as the flocculant is completed, and then the control valve is opened to deliver the chemical such as the flocculant to the mud pump 52. The use of the method of preparing the flocculant and other medicines in a high-speed circulation flow between the first sub-medicine tank 12 and the second sub-medicine tank 13 can save about three-fourths of the preparation time, and the method does not require separate storage of the prepared flocculant, thereby saving the space of the ship body 1.

According to the dredging ship disclosed by the embodiment of the invention, the dewatering device is arranged, so that the sludge can be dewatered, the weight and the volume of the sludge are greatly reduced, and the sludge is convenient to transport.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A watercraft having a travel step pile assembly comprising a hull and a travel step pile assembly mounted on the hull, the travel step pile assembly comprising a first travel step pile, a second travel step pile, a first travel means, a second travel means, a first lifting means and a second lifting means, the first travel step pile and the second travel step pile extending downwardly from the hull to extend into the water, the first travel means being connected to the first travel step pile, the second travel means being connected to the second travel step pile, the first travel means and the second travel means being for driving the hull to move in a direction of travel of the watercraft relative to the first travel step pile and the second travel step pile, the first lifting means being connected to the first travel step pile, the second lifting means being connected to the second travel step pile, the first lifting means and the second lifting means being for lifting the first travel step pile and the second travel step pile, respectively;

The device comprises a sludge pump, a sludge conveying pipeline and a medicament cabin, wherein the input end of the sludge pump is connected with a sludge input device through the sludge conveying pipeline, the output end of the sludge pump is connected with a sludge post-treatment device through the sludge conveying pipeline, and the medicament cabin is connected with the sludge pump or the sludge conveying pipeline at the input end of the sludge pump and is used for adding medicament into sludge;

the mud conveying pipeline is internally provided with a first rotational flow mechanism and a second rotational flow mechanism, the first rotational flow mechanism and the second rotational flow mechanism are positioned between the output end of the mud pump and the mud coating post-treatment equipment, and the rotational flow directions of the first rotational flow mechanism and the second rotational flow mechanism are opposite.

2. The watercraft with the travel step pile assembly of claim 1 wherein the first travel means and the second travel means each comprise a travel carriage, a rail and a carriage cylinder, the travel carriage being movably disposed on the rail, one end of the carriage cylinder being fixed relative to the rail and the other end being connected to the travel carriage to drive the travel carriage to move relative to the rail, the first travel step pile, the first lifting means, the second travel step pile and the second lifting means being disposed on the travel carriage of the first travel means and the second travel means, respectively.

3. The vessel with a traveling step pile assembly according to claim 2, wherein the first lifting device comprises a first lifting cylinder, the second lifting device comprises a second lifting cylinder, the telescopic directions of the first lifting cylinder and the second lifting cylinder are respectively parallel to the axial directions of the first traveling step pile and the second traveling step pile, one end of the first lifting cylinder is connected to the first traveling step pile, the other end is connected to a traveling trolley of the first traveling device, one end of the second lifting cylinder is connected to the second traveling step pile, and the other end is connected to a traveling trolley of the second traveling device.

4. A vessel with a travelling step pile assembly according to claim 3, wherein hydraulic pile clamps are provided on both the first and second rows of progressive piles, which are connected to the ends of the first and second lift cylinders respectively by means of the hydraulic pile clamps.

5. The watercraft with the travel step pile assembly of claim 1 further comprising a silt milling device connected to the hull for collecting silt to the hull, the silt milling device comprising a track support frame connected to the hull and extending obliquely out of the hull, a track, a shaft rotatably connected to the track support frame, a track movably connected to the track support frame and cooperating with the shaft, a plurality of milling buckets connected to the track, the drive connected to the shaft for driving the shaft to rotate, and a plurality of milling buckets for driving the track to rotate on the track support frame.

6. The watercraft with a travel step pile assembly of claim 5 further comprising a control module that controls the travel speeds of the first and second travel means according to the amount of mud to be dredged and the dredging speed of the mud milling and dredging means.

7. The ship with the travelling stub assembly according to claim 6, further comprising a positioning module, a storage device and a sonar sounding instrument, wherein the positioning module is used for detecting the position of the ship, an electronic drawing is stored in the storage device, and the control module calculates the amount of mud to be dug according to the difference between the depth of water measured by the sonar sounding instrument and the milling depth required by the electronic drawing.

8. The watercraft with the travel step pile assembly of claim 5 further comprising a crushing device disposed on the hull for conveying the silt milling device to the silt on the hull, comprising a crusher and a crusher, the crusher disposed below the crusher, the crusher comprising a crushing shaft, a crushing motor and a plurality of crushing blades, the crushing motor being connected to the crushing shaft for driving the crushing shaft to rotate, the plurality of crushing blades being disposed on the crushing shaft and distributed in an axial direction of the crushing shaft, the crusher comprising a crushing motor, a crushing shaft, a rotating blade holder, a fixed blade holder and a fixed blade holder, the crushing motor being connected to the crushing shaft for driving the crushing shaft to rotate, the rotating blade holder being fixed to the crushing shaft, the rotating blade holder being mounted to the rotating blade holder, the fixed blade holder being mounted to the fixed blade holder, the rotating blade holder being spaced from the fixed blade holder by a preset distance.

9. The ship with travel step pile assembly according to claim 5, further comprising a dewatering device arranged on the ship body and used for conveying the sludge milling device to the ship body for dewatering the sludge, wherein the dewatering device comprises a centrifugal screen, a centrifugal screen rotating shaft, a filter screen, a spiral pushing plate and a dewatering motor, the dewatering device is provided with a feeding hole and a discharging hole, the centrifugal screen is connected with the centrifugal screen rotating shaft, the filter screen is cylindrical, is fixedly connected with the centrifugal screen and is in nested fit, the spiral pushing plate is arranged in the filter screen, extends along the axial direction of the filter screen and is positioned between the feeding hole and the discharging hole, the dewatering motor is connected with the centrifugal screen rotating shaft and drives the centrifugal screen rotating shaft to rotate, and the centrifugal screen and the filter screen are rotated relative to the spiral pushing plate.

10. The watercraft with the travel step pile assembly of claim 9 wherein the dewatering device further comprises a pushing shaft disposed in the screen, the spiral pushing plate disposed on the pushing shaft, the pushing shaft driving the spiral pushing plate to rotate in the same direction as the centrifugal screen and screen, and the rotational speed of the spiral pushing plate is greater than the rotational speed of the centrifugal screen and screen.

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