“backacter 600” yoyo.pdf · “donge flushing yard”, portugalweg 3, 4455 tz nieuwdorp, the...

“BACKACTER 600”

“Donge Flushing Yard”, Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. +31.113.613100, Email; [email protected], www.shipyarddedonge.nl Changes without notice, referring to all pages, July 2015 of 12

INTRODUCTION

Shipyard De Donge designed and built a new type of excavator: the Backacter.

The first dedicated marine dipperdredger excavators in the world.

Why to do this:

• The Classic approach of an (land) excavator on a dipperdredger had too many

compromises.

• Higher lifting and penetration forces were demanded.

• A functional desire to put the engines in the hull; to have water cooling, no fuel stops,

a reduced oil spill risk, easier maintenance, etc.

• Free choice of dimensions and components.

• Stronger dredging equipment.

• Improved design with regard to maritime environment.

• Longer life time required than offered by the “classic” mining machine manufacturers.

• Reduced fire risk.

GENERAL FEATURES

• A top-class marine dredger with all drive unit power packs in an engineroom under deck.

• Big buckets at a deep dredging depth with highest penetration forces.

• No fuel stops required, automatic filling of the daytank.

• High and extended dumping reach.

• Low turbidity dredging machine.

• Shock-absorbing elastic foundation.

• All spud and spudcarrier operations from the Backacter’s cabin.

• One hydraulic powerpack system for the Backacter, for 360° rotating propulsion thruster,

and for the spudsystem.

• Water cooled diesels and water cooled hydraulic system (fresh water cooling).

• For working in ambient temperatures till -25OC


DREDGING EQUIPMENT

The BA600 can be executed with the following monobloc – stick combination:

First equipment:

• Boom : 13.25 metres

• Stick : 4.50 metres.

• Bucket : 5.00 m³ SAE

• Max. working depth : 14.00 metres approx.

• Penetration capacity on max depth : 50 tons approx.

Second equipment:

• Boom : 13.25 metres





Third equipment:

• Boom : 16.30 metres.





Fourth equipment:

• Boom : 16.30 metres.






TECHNICAL HIGHLIGHTS

BA 600 Marine Excavator features:

• Gravity filling of the hydraulic main-pumps for a longer life-time of the pumps.

• Water-cooled diesel with on gearbox mounted hydraulic pumpsets under deck in a well

maintainable spacious environment.

• Easy to observe / check / maintain, slewing motors and slewing ring teeth.

• Marine electric system (for dredge and excavator).

• Illumination for 24 hours working.

• Air-conditioning and heating in the cabin of the excavator.

• Longer life-time for the bearings of the dredging equipment.

• All bearings of the dredging equipment centrally greased, via stainless steel lines (triple

greasing system).

• By-pass float mode for the dredging equipment during spudcarrier moving.

• Bucket cylinder rods are protected by sliding steel structure.

• Forged cylinder rods for monobloc and stick cylinders.

• Spacious cabin for dredging and spud operation.

• Dredging instrumentation fitted in the cabin.

A view below deck in the engine room of the BA 600.


MAIN CHARACTERISTICS OF A “C-TYPE” DONGE DIPPERDREDGER

Below the main characteristics are given for the BA 600 mounted on a C-type pontoon:

• BA600 marine excavator mounted on a flexible pedestal.

• Bureau Veritas classification, Hull, Mach, loadline certificate.

• Capable to dredge max. 1.50 M wave height.

• Dimensions (standard) : 32.00 x 11.00 x 2.50 M.

• Bureau Veritas classification : dredge pontoon I 3/3, Estuaria.

• Spud length : 24.00 M basic length (or longer)

• Spudbuffering system, spudcarrier with 5,- M stroke.

• Dredging instrumentation; mounted in the cabin of the excavator.

• “Deep Sea” hull; high bow for optimum towing.

• Accommodation according clients instruction.

• “Backacter’s” low noise, water cooled diesel(s), mounted in a separate engine room under

the aft deck.

• Auxiliary crane near the “Backacter”.

• Painting system “Sigma”.

• Safety inventory.


Options:

• Self-propelled by 2 x 200 kW 360O rotating thrusters : ”assisted power”

(not for sailing)

• Additional auxiliary crane.

Note: The Backacter 600 can be mounted on a dipperbarge as well. In this execution the

spuds are non-tilting and no spudcarrier is present. It results in a large free deck area.

Whatever the soil density in the bucket… it can be lifted.


GENERAL TECHNICAL SPECIFICATIONS

• 1x 560 kW (“Cummins”, QSK19) installed.

• Upper carriage is heat stress relieved.

• Estimated weight of “Backacter” : 120 tons

• Hydraulic boom cylinders : 270 mm / 180 mm

• Stick cylinder : 220 mm / 140 mm

• Bucket cylinder : 180 mm / 110 mm (short + long stick)

• Forged connection eyes at rods applied.

• All cylinders have hydraulic “damping”.

• Large operation cabin.

Option; cabin made from stainless steel.

• Automatic greasing on slewing ring and

dredging equipment, except bucket

connections.

• Monobloc and stick can be switched in

H-bypasses (floating position)

• Diameter slewing ring : 3100 mm

• Slewing gears : 2

• Like all “Backacter’s”, the main hydraulic tank is

non-pressurized, thus enhancing H-pump and

eliminating air bubbles water cooled hydraulic

system.


ESTIMATED STANDARD PRODUCTION

The estimated standard production calculation for the BA600 at 16,- metres depth

with a 3 m³ SAE bucket is approx.120 M³/ hr.

The above calculation is done with the following assumptions.

- Filling degree 90%

- 45 minutes effective production per hour.

- Variables are e.g. : When dredging layer thickness is limited.

: Resistance of bottom.

: barge availability.

: Environmental (currents, waves, etc.).

: Operator, capability/ experience, etc.

: Profile dredging.


LIFTING CHART OF 1ST / SHORTEST CONFIGURATION


PENETRATION CHART OF 1ST / SHORTEST CONFIGURATION


LIFTING CHART OF 2ND CONFIGURATION


PENETRATION CHART OF 2ND CONFIGURATION

“backacter 600” yoyo.pdf · “donge flushing yard”, portugalweg 3, 4455 tz nieuwdorp, the...

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