Introduction Barge and Ship Unloading Boom and Sheaves Bucket Dynamics Buckets and Attachments Center of Gravity Colour Scheme Components Contacts Control Systems Corrosion Protection Cost per Ton Crawler Hopper Cycle Calculator Directions to the Factory Disclaimer Dredging Alternatives Environmental Features Features Floating Cranes Fuel Consumption Gantry Base Cranes History Liftcrane Long Reach Alternatives Magnet Tables Maintenance and Overhauls Operator Comfort Optional Equipment Photographs PLM Lineup Prices and Lease Calculator Reeving Diagrams Scrap Handling Ship Conversions Stevedoring Rigs SU Dredges Swing Drive Transportation Arrangements Undercarriage Updates Used Equipment Video Clips Winch Construction Wire Ropes If the menu does not respond, right click the yellow bar directly below "Address" at the top of the screen and allow blocked content...click "yes" when prompted. Click the PLM logo for the home page. Please read our disclaimer. draglines, grab cranes, clamshell cranes, duty cycle cranes, dredging cranes, dredges, stevedoring cranes, stevedoring rigs, hydraulic cranes, marine cranes, ship conversions, 4 rope cranes, barge unloaders, dockside cranes, crawler cranes, harbor cranes, floating cranes, self-unloaders, plm cranes, pulleman, btc, pullemanbtc, plm, used cranes, used duty cycle cranes, bulk handling cranes Self-Unloading Dredges Click for PLM50SU500 Deck barge...................... Click for PLM65SU1000 Deck barge Click for General Arrangement PLM 80LR1 SU1000.......... Click for Specification........... The PLM Self-Unloading dredge is a perfect solution for sand and gravel pits that have been excavated by dragline leaving deep deposits of sand and gravel submerged. The unit shown in the photograph is a PLM80LR1SU1000 located in Morrisville, Pennsylvania, USA. This unit has a separate generator on deck to run the 3000tph conveyor and power the deck hydraulics. One man is able to run the entire operation. By setting the spuds on the shallow side and digging off the deep side, the barge is able to attain depths of 100ft or more. twin thrusters, 200hp each, powered by the crane hydraulics, operated by the crane joysticks 50ft spuds radio controlled from the deck or from the crane cabin 54 inch conveyor belt with 100hp electric drive and frequency controlled starter 8yd bucket radio control over the 5 cargo gates 1000 gal double skin fuel tank 55ft x 130ft x 10ft one piece heavy barge, 3/8" scantlings bilge alarm system conveyor load control feedback system gps conveyor boom is able to luff. 1000t cargo capacity at 8.5ft draft One man is able to navigate the barge into position, set the spuds, fill the barge, retract the spuds, navigate back to shore and set the spuds without leaving the operator's cabin. It takes approximately 1.5 hours to fill the hopper with 40 seconds per crane cycle on average. Navigation time is about 7 minutes out, 10 minutes in. Conveyor time is between 20 minutes and 1/2 hour. One complete voyage can be completed in 2.5 to 3 hours, 3 or 4 voyages per shift. The thrusters are located port side fore and stbd side aft and are able to rotate as well as run fwd and reverse. Thruster position indicators in the crane cabin assist the operator. Side to side motion of the joysticks azimuth the thrusters, 12:00 is ahead and 06:00 is reverse. The barge is able to turn in its own length, travel sideways as well as fwd and reverse with more than enough power to handle heavy cross winds and make 6 knots. To unload, the crane operator comes down on deck to open and close the gates using a portable radio control. In straight sand and gravel, the gates and vibrators can be operated in a pre-programmed mode for totally automated unloading without leaving the crane cab. In very difficult material or material that does not de-water, such as silt and loose clay, the deck boom can be lowered to allow material to flow up the belt. This machine can handle everything from sand and gravel to straight water. In deposits with heavy rocks, a belt feeder can be installed along the stbd side into which rocks are pushed off the grizzly. The belt feeder loads a crusher and the material is fed into the main hopper. In this way, material stockpiled on shore can be used directly in the screening plant without having to separate the large rocks. This unit is completely self-contained without floating conveyors and has total mobility. The operators are able to go anywhere in the pit for specific materials and unload the material onto shore at any location in the facility. If you run into clay seams, the strategy is to dig a hole at one specific location, dig out your clay seams and dump them into the hole. If you have a ot of large rocks, you can use the crane to place them in a skip box or a deck barge alongside. You can also use a dump scow alongside for handling clay seams.