CN108797681B - River channel cleaning device and method arranged on ship - Google Patents
River channel cleaning device and method arranged on ship Download PDFInfo
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- CN108797681B CN108797681B CN201810624849.4A CN201810624849A CN108797681B CN 108797681 B CN108797681 B CN 108797681B CN 201810624849 A CN201810624849 A CN 201810624849A CN 108797681 B CN108797681 B CN 108797681B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/10—Devices for removing the material from the surface
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8833—Floating installations
- E02F3/885—Floating installations self propelled, e.g. ship
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/282—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with rotating cutting or digging tools
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/04—Loading devices mounted on a dredger or an excavator hopper dredgers, also equipment for unloading the hopper
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/06—Delivery chutes or screening plants or mixing plants mounted on dredgers or excavators
- E02F7/065—Delivery chutes or screening plants or mixing plants mounted on dredgers or excavators mounted on a floating dredger
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a river channel cleaning device and method arranged on a ship, wherein a power system for driving the ship to advance is arranged on the ship and comprises 2 vertical swing wings which are respectively arranged on the upper parts of two sides of the ship, each of the 2 vertical swing wings comprises a first garbage intercepting net rack and a second garbage intercepting net rack which are vertical to the side surface of the ship, the upper part of the outer side and the lower part of the outer side of each first garbage intercepting net rack are respectively provided with 2 first motors, rotating shafts of the 2 first motors are respectively connected with the upper part of the inner side and the lower part of the inner side of each second garbage intercepting net rack, the ship is provided with 2 second motors for respectively driving the 2 first garbage intercepting net racks to overturn, and the river channel cleaning device further comprises a controller which is respectively and electrically connected with the 2 first motors and the 2 second motors. The river channel cleaning device has the characteristics of good river channel cleaning effect, good river water quality keeping in the cleaning process and capability of ensuring the normal shipping function of the river channel.
Description
Technical Field
The invention relates to the technical field of river channel cleaning, in particular to a river channel cleaning device and a river channel cleaning method which are arranged on a ship and have good river channel cleaning effect and ensure river channel water quality and normal shipping function of a river channel.
Background
River channel siltation increasingly affects the normal performance of various functions such as flood control, waterlogging drainage, irrigation, water supply, navigation and the like, and river channel dredging engineering is required for recovering the normal functions of the river channel and promoting the rapid and continuous development of social economy.
In a common river channel dredging project, cofferdams are firstly required, then water in the cofferdams is pumped, surface layer sludge is directly sucked onto a tank car by a sewage suction pump and transported to a soil unloading point for stacking; manually cleaning the lower part of the muck (containing garbage and stones), then hoisting the muck to a temporary stacking point on the bank, and transporting the muck to a soil unloading point outside the bank for stacking; the river channel cleaning device can only clean branch river reach, has a long construction period, and can affect the normal shipping function of the river channel.
In addition, the rubbish on the water surface of the river channel is mainly salvaged manually, the clearing efficiency is low, the cost is high, the attractiveness of the river channel is affected, and the life quality is reduced.
Disclosure of Invention
The invention aims to overcome the defects that the construction period of garbage and sludge is long, the cleaning efficiency is low and the normal shipping function of a river channel is influenced in the prior art, and provides a river channel cleaning device and a river channel cleaning method which are arranged on a ship, have a good river channel garbage and sludge cleaning effect and ensure the water quality of the river channel and the normal shipping function of the river channel.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a locate marine river course cleaning device, be equipped with the driving system who is used for driving the ship to march on the ship, including locating 2 vertical swing wings on ship both sides upper portion respectively, 2 vertical swing wings all include with ship side vertically first rubbish interception rack and second rubbish interception rack, first rubbish interception rack outside upper portion and outside lower part are equipped with 2 first motors respectively, the pivot of 2 first motors respectively with the inboard upper portion and the inboard sub-unit connection of second rubbish interception rack, be equipped with 2 second motors that are used for driving 2 first rubbish interception rack upsets respectively on the ship, still include the controller, the controller is connected with 2 first motors and 2 second motor electricity respectively.
Before collecting rubbish, 2 first motors of controller control and 2 second motor work to drive 2 swing wings respectively and open, at the in-process that the ship was marchd, river surface rubbish gets into 2 swing wings respectively, the back is good in the refuse collection, 2 first motors of controller control make 2 swing wings press from both sides tight rubbish respectively, 2 second drive 2 swing wings upset to the ship in respectively, 2 first motors of controller control drive 2 vertical swing wings respectively and open, the rubbish that 2 vertical swing wings were collected is unloaded on the ship.
Therefore, the invention can automatically clear the garbage on the river surface conveniently and efficiently, effectively reduce labor cost, improve the cleanness of the river surface and improve the life quality of people.
Preferably, the device also comprises a plurality of vertical rods arranged at the bottom of the ship, a river bottom disturber arranged at the lower end of each vertical rod, a suction pipe arranged on the bottom of the ship behind each vertical rod, a first water pump arranged on the suction pipe, a first filter box arranged in the ship, a first storage box communicated with the first filter box, a first push plate arranged in the first filter box, a first power device connected with the first push plate, and a collection pool arranged below the first filter box; the collecting tank is connected with a second filter tank through a pipeline, the second filter tank is communicated with a second storage tank, a second push plate is arranged in the second filter tank and connected with a second power device, a drain pipe is arranged at the lower part of the first filter tank, and a second water pump is arranged on the pipeline; the size of each filtering hole of the second filtering tank is smaller than that of each filtering hole of the first filtering tank, and the controller is electrically connected with the power system, the first water pump, the second water pump, the first power device and the second power device respectively.
The invention can automatically absorb the surface sludge in the river channel, water in the sludge can be discharged into the river channel again after two times of filtration, the first filter tank and the second filter tank are respectively used for filtering large-volume substances and small-volume sludge in the sludge, and the filtered large-volume substances and small-volume sludge are respectively stored in the first storage tank and the second storage tank, so that the large-volume substances and the small-volume sludge can be conveniently respectively conveyed to different treatment places, and secondary pollution is avoided.
The method has the advantages that a cofferdam is not needed, the dredging can be carried out in the river channel of the full river basin in the light season of shipping, and the normal shipping function of the river channel is ensured while the dredging project is carried out.
Preferably, the river bottom spoiler is V-shaped, the river bottom spoiler comprises an inclined rod inclining forwards gradually from top to bottom and a V-shaped rod which is connected with the lower end of the inclined rod and is opened backwards, and a plurality of connecting rods which are arranged at intervals are arranged between the V-shaped rod and the inclined rod.
The river bottom disturbers of the invention turn over the sludge at the river bottom, the turned-over sludge leaks out from the gaps among the connecting rods, the leaked sludge can be just sucked by the lower end of the suction pipe, the river bottom disturbers not only turn over the sludge, but also provide shielding protection for the suction pipe, and the suction pipe is not easy to damage.
Preferably, the first garbage intercepting net rack and the second garbage intercepting net rack comprise rectangular frames, a plurality of support rods and fishing nets, wherein the support rods and the fishing nets are arranged in the rectangular frames; the rectangular frame lower edges of the first garbage intercepting net rack and the second garbage intercepting net rack are respectively provided with a strip-shaped floater.
Preferably, the upper ends of the two sides of the ship are respectively provided with a rotating shaft, and the two rotating shafts are respectively connected with the rotating shafts of the 2 second motors.
Preferably, the first power device and the second power device are both cylinders, and the telescopic rods of the 2 cylinders are respectively connected with the first push plate and the second push plate.
A method for arranging a river channel cleaning device on a ship comprises the following steps of water garbage collection:
(7-1) the controller controls 2 second motors to respectively drive 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings respectively rotate to two sides of the ship, and the controller controls the 2 second motors to stop working after the lower ends of the 2 vertical swinging wings fall on the water surface;
(7-2) the controller controls 2 first motors to respectively drive the second garbage intercepting net racks to rotate, so that the first garbage intercepting net rack and the second garbage intercepting net rack of each swing wing are erected on the same vertical plane;
(7-3) controlling the power system to work under the control of the controller, wherein in the process of advancing of the ship, 2 swing wings block the garbage on the river surface and move forward together with the ship;
(7-4) when the time for the power system to work reaches T2, the controller controls the power system to stop working; the controller controls 2 first motors to respectively drive the second garbage intercepting net racks of the 2 vertical swing wings to rotate, so that the first garbage intercepting net racks and the second garbage intercepting net racks of the 2 vertical swing wings clamp garbage;
(7-5) the controller controls 2 second motors to respectively drive 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings are all turned into the ship, the controller controls 2 first motors to respectively drive 2 vertical swinging wings to open, and the garbage collected by the 2 vertical swinging wings is unloaded onto the ship; and (4) after the power system stops working for T3 time, the step (7-1) is carried out.
Preferably, the method further comprises the following river sludge removing step:
(8-1) the controller controls the power system to work for A minutes at intervals of T1, each river bottom spoiler is inserted into the sludge in the advancing process of the ship, and the river bottom sludge is turned up by each river bottom spoiler along with the movement of the ship;
(8-2) while the ship travels, the controller controls the first water pump to work, river water carrying silt is pumped into the first filter tank, substances with diameters larger than that of all filter holes of the first filter tank in the silt are left, silt which does not pass through all filter holes at the bottom of the second filter tank is left in the second filter tank, and the controller controls the first power device to do reciprocating motion once when the first water pump stops working, so that the substances which do not pass through all the filter holes are pushed into the first storage tank;
(8-3) in the gap between the ship and the ship, the controller controls the second water pump to work, the mud-water mixture in the collecting tank is pumped into the second filter tank, the filtered water is discharged into a river through the water discharge pipe, and the controller controls the second power device to drive the second push plate to send the filtered sludge into the second storage tank.
Therefore, the invention has the following beneficial effects: the garbage on the river surface can be conveniently and efficiently removed automatically, and the labor cost is effectively reduced; the river course cleaning effect is good, and the river water quality keeps well in the cleaning process, can not influence the normal shipping function of the river course, has created economic benefits, has reduced construction cost.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the river bottom spoiler of the present invention;
FIG. 3 is a schematic view of a partial structure of the present invention;
FIG. 4 is a schematic view of one configuration of the vertical oscillating wing, the elongated float and the rotating shaft of the present invention;
FIG. 5 is a functional block diagram of the present invention;
FIG. 6 is a flowchart of embodiment 1 of the present invention;
fig. 7 is a flowchart of embodiment 2 of the present invention.
In the figure: the device comprises a vertical rod 1, a river bottom disturber 2, a suction pipe 3, a first filter tank 4, a first storage tank 5, a second filter tank 6, a drain pipe 7, a first water pump 8, a power system 12, a second water pump 13, a controller 15, an inclined rod 21, a V-shaped rod 22, a connecting rod 23, a first push plate 41, a first power device 42, a collecting tank 43, a second push plate 61, a second power device 62, a ship 101, a second storage tank 102, a pipeline 103, a vertical swing wing 201, a first garbage intercepting net rack 202, a second garbage intercepting net rack 203, a first motor 204, a second motor 205, a long-strip-shaped floater 206 and a rotating shaft 207.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example 1
As shown in fig. 4, the embodiment shown in fig. 5 is a river cleaning device arranged on a ship 101, a power system 12 for driving the ship to advance is arranged on the ship, and the river cleaning device comprises 2 vertical swing wings 201 respectively arranged on the upper portions of two sides of the ship, wherein each of the 2 vertical swing wings comprises a first garbage intercepting net rack 202 and a second garbage intercepting net rack 203 which are perpendicular to the side surface of the ship, 2 first motors 204 are respectively arranged on the upper portion and the lower portion of the outer side of the first garbage intercepting net rack, the rotating shafts of the 2 first motors are respectively connected with the upper portion and the lower portion of the inner side of the second garbage intercepting net rack, 2 second motors 205 for respectively driving the 2 first garbage intercepting net racks to overturn are arranged on the ship, and the river cleaning device further comprises a controller 15 which is respectively electrically connected with the 2 first motors and the 2 second motors.
As shown in fig. 4, the first and second trash catching net racks each include a rectangular frame, 4 support rods and a fishing net provided in the rectangular frame; the rectangular frame lower edges of the first and second trash catching net racks are provided with elongated floats 206.
The upper ends of two sides of the ship are respectively provided with a rotating shaft 207, and the two rotating shafts are respectively connected with the rotating shafts of the 2 second motors.
As shown in fig. 6, a method of a river cleaning device provided on a ship includes an aquatic garbage collecting step:
The controller controls the 2 second motors to respectively drive the 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings respectively rotate to two sides of the ship, and the controller controls the 2 second motors to stop working after the lower ends of the 2 vertical swinging wings fall on the water surface;
The controller controls 2 first motors to respectively drive the second garbage intercepting net rack to rotate, so that the first garbage intercepting net rack and the second garbage intercepting net rack of each swing wing are erected on the same vertical plane;
When the controller controls the power system to work, in the process of ship moving, 2 swinging wings block the garbage on the river surface and move forward together with the ship;
When the working time of the power system reaches 30 minutes, the controller controls the power system to stop working; the controller controls 2 first motors to respectively drive the second garbage intercepting net racks of the 2 vertical swing wings to rotate, so that the first garbage intercepting net racks and the second garbage intercepting net racks of the 2 vertical swing wings clamp garbage;
The controller controls the 2 second motors to respectively drive the 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings are all turned into the ship, the controller controls the 2 first motors to respectively drive the 2 vertical swinging wings to open, and the garbage collected by the 2 vertical swinging wings is unloaded onto the ship; after the power system stops operating for time T3, the process proceeds to step 100.
Example 2
As shown in fig. 2, the river bottom spoiler is V-shaped, and includes an inclined bar 21 inclined forward gradually from top to bottom and a V-shaped bar 22 connected to a lower end of the inclined bar and opened backward, and 10 connecting bars 23 arranged at intervals are provided between the V-shaped bar and the inclined bar.
The first power device and the second power device are cylinders, and the telescopic rods of the 2 cylinders are respectively connected with the first push plate and the second push plate.
As shown in fig. 7, a method of a river cleaning device installed on a ship includes a river sludge removing step:
The controller controls the power system to work for 10 minutes every 10 minutes, each river bottom disturber is inserted into the sludge in the advancing process of the ship, and the river bottom sludge is turned up by each river bottom disturber along with the movement of the ship;
When the ship moves, the controller controls the first water pump to work, river water carrying silt is pumped into the first filter tank, substances with the diameter larger than that of each filter hole of the first filter tank are left in the silt, and when the first water pump stops working, the controller controls the first power device to do reciprocating motion once, and the substances which do not pass through each filter hole are pushed into the first storage tank;
In the gap of twice marcing around the ship, the work of second water pump is controlled to the controller, takes out the mud-water mixture of collecting pit to the second rose box, and in the filterable water passed through the drain pipe and discharged into the river, the silt that does not pass through each filtration pore of second rose box bottom stayed in the second rose box, and the controller control second power device drives the silt that the second push pedal will filter out and send into the second holding tank in.
It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a locate marine river course cleaning device, be equipped with on the ship and be used for driving the driving system (12) that the ship marchd, characterized by, river course cleaning device includes 2 vertical swing wings (201) of locating ship both sides upper portion respectively, 2 vertical swing wings all include with ship side perpendicular first rubbish interception rack (202) and second rubbish interception rack (203), first rubbish interception rack outside upper portion and outside lower part are equipped with 2 first motors (204) respectively, the pivot of 2 first motors is connected with inboard upper portion and inboard lower part of second rubbish interception rack respectively, be equipped with 2 second motors (205) that are used for driving 2 first rubbish interception rack upset respectively on the ship, still include controller (15), the controller is connected with 2 first motors and 2 second motors electricity respectively; the device comprises a plurality of vertical rods (1) arranged at the bottom of a ship, a river bottom disturber (2) arranged at the lower end of each vertical rod, a suction pipe (3) arranged at the bottom of the ship behind each vertical rod, a first water pump (8) arranged on the suction pipe, a first filter box (4) arranged in the ship, a first storage box (5) communicated with the first filter box, a first push plate (41) arranged in the first filter box, a first power device (42) connected with the first push plate, and a collection pool (43) arranged below the first filter box; the collecting tank is connected with a second filtering tank (6) through a pipeline (103), the second filtering tank is communicated with a second storage tank (102), a second push plate (61) is arranged in the second filtering tank, the second push plate is connected with a second power device (62), a drain pipe (7) is arranged at the lower part of the first filtering tank, and a second water pump (13) is arranged on the pipeline; the size of each filtering hole of the second filtering tank is smaller than that of each filtering hole of the first filtering tank, and the controller is electrically connected with the power system, the first water pump, the second water pump, the first power device and the second power device respectively.
2. The river cleaning device as claimed in claim 1, wherein the bottom spoiler is V-shaped, the bottom spoiler comprises an inclined bar (21) inclined forward gradually from top to bottom and a V-shaped bar (22) connected to a lower end of the inclined bar and opened backward, and a plurality of connecting bars (23) are arranged between the V-shaped bar and the inclined bar at intervals.
3. The river cleaning device arranged on the ship as claimed in claim 1, wherein the first garbage intercepting net rack and the second garbage intercepting net rack each comprise a rectangular frame, a plurality of support rods and a fishing net arranged in the rectangular frame; the lower edges of the rectangular frames of the first garbage intercepting net rack and the second garbage intercepting net rack are respectively provided with a strip-shaped floater (206).
4. The device for cleaning river course on board according to claim 1, wherein the boat has two rotating shafts (207) at both sides of the boat, and the two rotating shafts are respectively connected to the rotating shafts of the 2 second motors.
5. The river channel cleaning device arranged on the ship according to claim 1 or 2, wherein the first power device and the second power device are both cylinders, and the telescopic rods of the 2 cylinders are respectively connected with the first push plate and the second push plate.
6. A method for cleaning a river channel on a ship according to claim 1, which comprises the step of collecting water garbage:
(6-1) the controller controls 2 second motors to respectively drive 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings respectively rotate to two sides of the ship, and the controller controls the 2 second motors to stop working after the lower ends of the 2 vertical swinging wings fall on the water surface;
(6-2) the controller controls 2 first motors to respectively drive the second garbage intercepting net racks to rotate, so that the first garbage intercepting net rack and the second garbage intercepting net rack of each swing wing are erected on the same vertical plane;
(6-3) controlling the power system to work under the control of the controller, wherein in the process of advancing of the ship, 2 swing wings block the garbage on the river surface and move forward together with the ship;
(6-4) when the time for the power system to work reaches T2, the controller controls the power system to stop working; the controller controls 2 first motors to respectively drive the second garbage intercepting net racks of the 2 vertical swing wings to rotate, so that the first garbage intercepting net racks and the second garbage intercepting net racks of the 2 vertical swing wings clamp garbage;
(6-5) the controller controls 2 second motors to respectively drive 2 vertical swinging wings to rotate, so that the 2 vertical swinging wings are all turned into the ship, the controller controls 2 first motors to respectively drive 2 vertical swinging wings to open, and the garbage collected by the 2 vertical swinging wings is unloaded onto the ship; and (4) after the power system stops working for T3 time, the step (6-1) is carried out.
7. The method for cleaning the river channel on the ship according to claim 1, further comprising the following river channel sludge removing step:
(7-1) the controller controls the power system to work for A minutes at intervals of T1, each river bottom spoiler is inserted into the sludge in the advancing process of the ship, and the river bottom sludge is turned up by each river bottom spoiler along with the movement of the ship;
(7-2) while the ship moves, the controller controls the first water pump to work, river water carrying silt is pumped into the first filter tank, substances with the diameter larger than that of each filter hole of the first filter tank in the silt are left, and the controller controls the first power device to do reciprocating motion once when the first water pump stops working, and the substances which do not pass through each filter hole are pushed into the first storage tank;
(7-3) in the gap between the ship and the ship, the controller controls the second water pump to work, the mud-water mixture in the collecting tank is pumped into the second filter tank, the filtered water is discharged into the river through the drain pipe, sludge which does not pass through each filtering hole in the bottom of the second filter tank is left in the second filter tank, and the controller controls the second power device to drive the second push plate to send the filtered sludge into the second storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624849.4A CN108797681B (en) | 2018-06-17 | 2018-06-17 | River channel cleaning device and method arranged on ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624849.4A CN108797681B (en) | 2018-06-17 | 2018-06-17 | River channel cleaning device and method arranged on ship |
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| CN108797681A CN108797681A (en) | 2018-11-13 |
| CN108797681B true CN108797681B (en) | 2020-09-04 |
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| CN108797681A (en) | 2018-11-13 |
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