CSD-250 Cutter Suction Dredger

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

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Supply Capability:: 10 unit/month

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General Introduction

u This cutter suction dredger is designed to operate in sheltered inshore waters and under tropical climate conditions. Build under enterprise standard with reference to ZC standard.

u She is of all welded steel construction ,bottom plate 8 mm thickness and shell plating 6 mm thickness, frame distance 500 mm, with 2 fixed spuds on the aft ,ladder support A frame in the front and 3 hydraulic operated winches ,2 double bollards(fwd and aft) and 1 single bollard in the center on each side.

u The whole dredger is dismountable in road transportable sections.

u The engines and dredge pump are located in the center pontoon, the 2 side pontoons serve as fuel bunkers, ballast tanks and store.

u Engine room and pump section are accessible by watertight hatches

u Cutter shaft runs on roller type bearings in an enclosed shaft housing flooded with lubrication oil a lock oil tank to ensure a positive pressure inside the bearing housing is located on top of the wheelhouse.

u The spacious control cabin is ergonomically designed fitted on a raised platform with all around non obstructed view ,2 operators consoles containing engine instrumentation and controls for winches, dredge pump, suction and discharge pressure gauges, navigation light controls, airconditioned and well insulated .

u Below the control cabin is a changing room located with table, chairs and washbasin

u The underwater section of the dredger is protected with a marine coating system and cathodic protection for use in a saltwater environment。

TECHNICAL SPECIFICATION CSD250
No.	Item	Description	Remark
1.	General Principle
	(1). Overall Length	26m
	(2). Side Pontoon Size	17m
	(3). Main Pontoon Size	11.0m
	(4). Breadth	5.2m
	(5). Moulded Depth	1.6m
	(6). Mean Draft	1.0m
	(7). Dredging Depth	10m
	(8). Pumping Distance	1000m
	(9). Pump Flow Capacity	1400m³/h
	(10).Suction Pipe Dia	350mm	Out Diameter
	(11) Discharge Pipe Dia	350mm	Out Diameter

2.	Main Pontoon
	(1). Dimension	11m2.2m1.6m
	(2). Bottom Plate Thick	10mm	CCSB marine plate
	(3). Side Wall Thick	8mm	CCSB marine plate
	(4). Front and Rear	14mm	CCSB marine plate

3.	Side Pontoon
	(1). Dimension	17m1.5m1.6m
	(2). Bottom Plate Thick	8mm
	(3). Side Wall Thick	6mm
	(4). Front and Rear Thick	6mm

4.	Main Engine		Drive dredger pump only
	(1). Make	weichai
	(2). Model	8170	Marine Engine. Cummins is optional
	(3). Power / rpm	601Kw @ 1500 rmp
	(4). Fuel Consumption	85L/h
	(5). Cooling Style	Water Cooling

6.	Axle Generator		Driven by auxiliary engine
	Make	STANFORD
	Power / rpm	24Kw

7.	Harbor Generator		Drive hydraulic pump & axle generator
	Make	WEICHAI +STANFORD
	Power / rpm	24Kw
	Fuel Consumption	4L/h
	Cooling Style	Air Cooling
	Output Voltage	220V/ 380V

8.	Dredge Pump
	Make	SHIJIAZHUANG
	Model	250G-G
	Suction Pipe Diameter	300mm
	Discharge Pipe Diameter	250mm
	Head	65m
	Rpm	650rpm
	Water Flow Capacity	1200m³/h

9.	Gearbox
	Model	L620
	Ratio	2 : 1

10.	Cutter
	Style	Hydraulic Motor+ Planetary Gearbox
	Cutter Power	60kw
	Crown Diameter	900mm
	Cutter Out Diameter	1000mm
	Blades	5pcs	High manganese alloy
	Cutter Teeth	33pcs	High manganese alloy
	Rpm	0-10-30rpm

11.	Ladder Winch		Hydraulic Drive
	Winch Motor Brand	XINHONG	Sino-Italy Joint Venture
	First Layer Pull	4 Ton
	Wire Rope Dia	18mm
	Wire Rope Capacity	120m
	Wire Speed	0-20m/min

12.	Swing Winch		Hydraulic Drive
	Winch Motor Brand	XINHONG	Sino-Italy Joint Venture
	First Layer Pull	4 Ton
	Wire Rope Dia	18mm
	Wire Rope Capacity	120m
	Wire Speed	0-20m/min
	Quantity	2 sets

14	Spud
	Length	13m
	Diameter	325mm
	Weight	2200Kg	Each

15	Spud Cylinder
	Cylinder Stroke	2.0m
	Cylinder Dia	140mm
	Working Pressure	16Mpa
	Travel Speed	0.2m/s

17.	Anchor
	(1). Type	HHP Anchor
	(2). Weight	300Kg

18.	Operation Cabin
	(1). Operation Board	Control all dredger movement commands and monitor equipments running condition. PLC system from SIMENS
	(2). Adjustable Chair	For dredger master. Leather.
	(3). A/ C	One set
	(4). Lounge	First floor cabin has space for two persons rest.

19.	Hydraulic System
	A. System Introduction	Hydraulic system is designed to supply power for winches, cutter, spud cylinder. Hydraulic pump separately is driven by engine free end.
	B. Hydraulic Motor	From Sino-Italy Joint Venture, YINING. Excellent working performance and durable usage life.
	C. Hydraulic Pump	NANJING

20.	Painting Principle
	Introduction	Do sand blasting before welding. Use good quality marine paint with greater thickness. Paint system is 3 or 4 layers with minimum thickness of 400 micron on the below water line area

19.	Electrical System
	Introduction	All electrical components are from famous brand as Omron and CHINT. Equip overload protection box to control safety. Use high quality electrical marine type cables (smoke and halogen free).
20.	Navigation Tool
	(1). Elec-mag Compass	Equipped
	(2). VHF-Radiotelephone	Equipped

Q: The famous type of cutter suction dredger: The leading dredging expert, Jan De Nul, will further expand its fleet of ships, which will build a self propelled suction dredger, named JDN8069, at the Croatia shipyard UljanikBrodogradiliste. After completion, the ship will become the world's largest suction suction dredger, compared with Luxemburg, JDN dredging group currently has the world's largest suction suction dredger, "J.F.J. DeNul", power 50%. JDN8069 ship is expected to be delivered in early 2017, global operations.

Q: What is the working principle of a cutter suction dredger?: Construction principle of cutter suction dredger:The dredger is in place, the steel pile excavation construction method, horizontal positioning dredging and filling, it is with a fall in the channel center line of the main hull positioning pile as the center of the rotation, the role of the reamer for traversing on lateral swing in the channel width, the construction method of excavation section of soil layer cutting cutter.

Q: How much dredging can the 4000 side /h suction dredge dredge in one day? Soft silt: The pump in the cabin and the underwater pump are full load. The length of the pipeline is within 3 kilometers, and the depth is about -16 meters. According to the rate of 18 hours per day, the production rate is 61200 according to 3400.The actual amount should be between 45000 and 55000.

Q: Who has the construction plan of dredger dredger after dredger dredging and dredging with dredger barge?: Would dig into the mud barge, barge by suction dredger, using force pump suction dredger through pipelines on shore

Q: Does dredging dredger need relevant qualification?: This should be based on the requirements of your local department, which is not required in general

Q: Classification of trailing suction dredgers for trailing suction dredger: Trailing suction dredger is one of suction suction type. It sucks in mud by raking the head of the two side of the ship's hull or at the tail to work with mud and side navigation. Is the use of mud rake scarification, boat design sediment tank, tank volume said the size of the ship. A single to rake or harrow, are arranged on the ship or on both sides. Suction dredger is flexible, high efficiency, strong wind waves, suitable for coastal ports, the wide river and ship anchorage operation in large waves and without the cover of coastal and estuarine areas, should choose the self-propelled trailing suction dredger. Soil works suitable for loosening and less than clay hardness. The self-propelled boat is equipped with a mobile power unit (paddle machine) to drive the dredger.

Q: 3800m3 cutter suction dredger: 3800m3 bucket wheel dredger is at the end of the last century according to the Ministry of transportation "based on domestic design and construction, the introduction of equipment key technology policy, the Yangtze River Waterway Bureau presided over the development of construction, Shanghai 708 Institute of design, Wuchang shipyard built China's first inland new dredger. The ship's key power equipment, dredging equipment, hydraulic systems were provided by German SKL company, United States Ellicotte (Aili, Kurt) company, the United States Dennison hydraulic company. This ship has been officially delivered to the Yichang Waterway Engineering Bureau of the Yangtze River. The name of vessel is No. 1.Bucket wheel cutting device in the river near the mouth of the soil suction, and by rotating the bucket wheel by cutting soil and water into high concentration mud, directly transported to the suction suction head of the top tube, rely on the suction centrifugal pump, the suction pipe has certain vacuum. The mud suction head, suction tube at the top end of the suction pipe, through the mud pump pressure after the mud through the mud discharging pipe into the mud barge or transported to the mud field. Through positioning piles, positioning piles, landing gear and traversing winch, the positioning of dredger, longitudinal forward movement and lateral swing of ship are achieved, and the purpose of continuous excavation of river bed soil is achieved.

Q: What is the difference between a cutter suction dredger and a trailing suction dredger?: The work of a cutter suction dredger works through an agitator in the head of a straw and straw.

Q: The working principle of a trailing suction dredger: The ship is equipped with one or several sets of centrifugal pumps, centrifugal pumps for absorbing water and mud from the bottom of the vessel, into the mud tank. These operations are carried out on the voyage, while air while digging, mud tank fill to throw mud mud area, through the Bilge mud. Handle cases

Q: What are the crew members on the dredge?: The tonnage of dredger is large and small, and the dredging method is also divided into many kinds, so it can not be generalized.

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