1. Foreword
The LDCSD-250 Cutter Suction Dredger of steel construction, the non self-propelled, dismountable type, is able to berth and dredge at any waters both in the coastal area and inland rivers.
The dredger can be used to excavate and transport cohesive sediment below the class III specified in code for dredging engineering construction technique issued by Ministry of Water Resources(MWR) of P.R.China.
In the course of technical designing, we have considered special requirements for local tropical climate conditions such as meteorological and waters distributing state etc.
Its hull consists of a main pontoon and two side pontoons which is to be easy to dismantle or mount for transportation by road, rail or water, and is to be easy to reassemble at project site.The engines and dredge pump are located in the center pontoon,the 2 side pontoons serve as fuel bunkers,ballast tanks and store.
The dredger is powered by diesel engine. The dredge pump is driven by the engine through the gearbox. On the gearbox, two hydraulic pumps are equipped, to supply power for all the hydraulic equipments such as cutter, swing and ladder winches, and the spud rams etc.
The spacious control cabin is ergonomically designed with 360 degree view. All the operation buttons, switches, indicators, gauges are equipped on the control desk. only two operators can control all the dredger in the operation room.
The dredger is painted by 4 coats of marine paint to protect from the corrosion. The ZINC anode can be used to give better anti-corrosion function.
2. Dredger Arrangement in Whole
You can see the following arrangement from foreword to end of the dredger:
------Cutter
------Cutter Ladder
------Ladder Gantry
------Swing Winches
------Ladder Winch
------Operating Room
------Deck Diesel Generator Set
------Dredge Pump
------Gearbox
------Diesel Engine
------Generator and Hydraulic Pump, Emergency Hydraulic Pump
------Seal Water Pump
------Spuds and Spud Hoisting Rams
3. Specification List
| Ser | Description | Required Specification | Remarks | |||
| A | Supplier | HEBEI LEADER IMP.&EXP. CO., LTD. | ISO Certified Enterprise | |||
| B | Brand | Can use your brand or ours | Registered Brand | |||
| C | Make and Model | LDCSD-250 | ||||
| D | Dredger Unit | |||||
| 1. Dredger Type | Cutter Suction Dredger | |||||
| 2. Principle Dimensions | ||||||
| (1) Length Overall | 25.0 m | |||||
| (2) Breadth | 5.4 m | |||||
| (3) Depth | 1.6 m | |||||
| (4) Draft Loaded | 1.0 m | |||||
| (5) Dredging Depth | 10.0 m | |||||
| (6) Discharge Distance | 800 m | |||||
| (7) Pump Water Flow | 1200 m3/hr | |||||
| (8) Solid Output | 200 m3/hr | |||||
| (9) Total Installed Power | 559 kw | Cummins Engine | ||||
| 3. Main Pontoon | ||||||
| (1) Length | 11.0 m | |||||
| (2) Width | 2.2 m | |||||
| (3) Depth | 1.6 m | |||||
| (4) Plate Thickness- Sides | 6 mm | CCSB Steel Plate | ||||
| (5) Plate Thickness- Deck | 6 mm | CCSB Steel Plate | ||||
| (6) Plate Thickness- Bottom | 10 mm | CCSB Steel Plate | ||||
| 4. Side Pontoons | ||||||
| (1) Length | 17 m | |||||
| (2) Width | 1.6 m | |||||
| (3) Depth | 1.6 m | |||||
| (4) Plate Thickness- Sides | 6 mm | CCSB Steel Plate | ||||
| (5) Plate Thickness- Deck | 6 mm | CCSB Steel Plate | ||||
| (6) Plate Thickness- Bottom | 6 mm | CCSB Steel Plate | ||||
| 5. Dredging Pump | ||||||
| (1) Made | SHIJIAZHUANG PUMP GROUP | Australia Warman Technology | ||||
| (2) Model | 12/10 G-G | |||||
| (3) Head | 40-65 m | |||||
| (4) Pump Water Flow | 1200 m3/hr | |||||
| 6. Main Engine | ||||||
| (1) Manufacturer | Cummins | |||||
| (2) Model | KTA19 | |||||
| (3) Rated Power with RPM | 559 KW @ 1800 RPM | |||||
| (4) Amount | 1 set | |||||
| 7. Gearbox | ||||||
| (1) Manufacturers | Hangzhou Gearbox | |||||
| (2) Model | Marine Gearbox | |||||
| (3) Amount | 1 set | |||||
| 8. Cutter | ||||||
| (1) Type | Crown | Alloy material | ||||
| (2) Wearing parts on cutting edges | Replaceable Alloy Teeth | |||||
| (3) Driver | Hydraulic Motor | |||||
| (4) Diameter | 1200 mm | |||||
| (5) Cutter Shaft Power | 60 kw | |||||
| (6) Cutting Speed in rpm | 0-40 | |||||
| (7) Amount of Blades Teeth | 20 pieces | |||||
| 9. Ladder Winch | ||||||
| (1) Line Pull - Second Layer | 40 KN | |||||
| (2) Line Speed - Second Layer | 0-20 m/min | |||||
| (3) Wire Size | Φ18 mm | |||||
| (4) Driver | Hydraulic Motor | |||||
| 10. Swing Winch | ||||||
| (1) Line Pull - Second Layer | 40 KN | |||||
| (2) Line Speed - Second Layer | 0-20 m/min | |||||
| (3) Wire Size | Φ18 mm | |||||
| (4) Driver | Hydraulic Motor | |||||
| 11. Spuds | ||||||
| (1) Amount | 2 | |||||
| (2) Dia. | 377 mm | |||||
| (3) Thickness | 16 mm | |||||
| (4) Length | 14 m | |||||
| (5) Material | 16 Mn | |||||
| (6) Drive | Hydraulic Ram | |||||
| 12. Spud Hydraulic Ram | ||||||
| (1) Cylinder Travel | 2.0 m | |||||
| (2) Core Diameter Cylinder | 125 mm | |||||
| (3) Working Pressure | 16 MPa | |||||
| (4) Wire Size | Φ20 mm | |||||
| 13. Operating Cabin | ||||||
| (1) Main Item | PLC Control Desk | Siemens PLC (German Origin) | ||||
| (2) Air Condition | 1 set | |||||
| (3) Adjustable Chair | Leather , adjustable | |||||
| (4) Control Indicator and Lights | 1 set | Equipped on the Control Desk | ||||
| (5) Operation Gauges | 1 set | |||||
| (6) Suction Depth Indicator | 1 set | |||||
| 14. Hydraulic System | ||||||
| (1) Description | Hydraulic system of proven design & reputed make to be used for operation of winches, cutter, spuds etc. All components are to be of proven design for trouble free operation. Hydraulic Pumps are "Vane Type" & driven through the Gearbox. | |||||
| 15. Tanks | ||||||
| (1) Description | Fuel oil tanks, water ballast tanks, fresh water tank and dry tanks are to be provided. | |||||
| 16. Anchors and Wire Ropes | ||||||
| (1) Description | Anchors: 2 Nos. @ 200kg Side winch wire (fitting): Minimum 100 m on each side. Necessary wires, gantry wires, spud slings, spud hoisting wires, mooring ropes etc. to be supplied and fitted with dredger. | |||||
| 17. Auxiliary Generator | ||||||
| (1) Make & Model | Sunvim Generator | Supplying Power for battery charging, fuel transfer pump, lighting, operation of one welding machine, air condition, bilge pump and other electric equipment. | ||||
| (2) Power | 30 kw | |||||
| (3) Voltage | 220/380 v | |||||
| (4) Amount | 1 set | |||||
| 18. Deck Generator Set | ||||||
| (1) Make and Model | Weichai | When in emergency condition, the deck generator will start to supply power. | ||||
| (2) Power | 30 kw | |||||
| (3) Voltage | 220/380 v | |||||
| 19. Lights | ||||||
| (1) Description | Deck Lights: 1 Unit 500 watt spot light mounted on the ladder lift gantry 2 Units 500 watt spot lights mounted on the control cabin roof 4 Units 65 watt flood lights mounted on control cabin roof Engine Room Lights: 8 Units sunlight lamps divided over engine room area. Operating Cabin Lights: 2 Units sunlight lamps in the control room | |||||
| 20. Portable Bilge Pump | ||||||
| (1) Description | Used to discharge dirty water in the bottom of pontoons. Driven by electricity | |||||
| 21. Signal Mast | ||||||
| (1) Description | Signal lamps required for navigation is to be provided. | |||||
| 22. Cathodic Protection | ||||||
| (1) Description | Sufficient amount of anodes to be placed on the dredger body for a period of 2 years in salty water. | |||||