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A trailing suction hopper dredger[1] (TSHD) is a type of ship capable of maintaining navigable waterways, deepening the maritime canals that are threatened to become silted, constructing new land elsewhere or replacing sand eroded by storms or wave action on the beaches. This is made possible by large, powerful pumps and engines able to suck ...
The dredger built at Tebma's Malpe facility in Karnataka is a self-propelled grab-hopper dredger that can discharge dredged material through eight hopper doors controlled by hydraulic rams and chains over pulley out at sea. Grab-hopper dredgers generally produce minimal turbidity and less disturbance to marine ecosystem.
A grab dredge. Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value.
USAV. Yaquina. USAV Yaquina is a hopper dredge of the United States Army Corps of Engineers. Her primary mission is to maintain the entrance bars, rivers, and harbors along the coasts of California, Oregon, and Washington. She is assigned to the Portland District of the Army Corps of Engineers. Her homeport is Portland, Oregon.
Queen of the Netherlands (ship) Queen of the Netherlands. (ship) Queen of the Netherlands is a Dutch trailing suction hopper dredger ship constructed in 1998. After lengthening in 2009, she was the largest and most powerful dredger in the world. The vessel has been used in high-profile salvage and dredging operations including the investigation ...
A dredge drag head is used by a trailing suction hopper dredger to collect sand from the sea floor. Dredge drag head. The dredge drag head of a suction dredge barge on the Vistula River, Warsaw, Poland. The same dredge drag head and the suction pipe. The dredge drag head is a steel structure that is connected to the dredger by a suction pipe.
The dredge turning gland has a special particularity. Attached to the lower suction pipe the dredge turning gland allows a radial rotation in both directions of 15°. Due to this particularity the dredge turning gland enable the dredge drag head to follow the sea bottom without losing vacuum The dredge turning gland’s flanges are cast ...
Dredge valve. The dredge valve is a component of a Cutter Suction Dredge or a Trailing Suction Hopper Dredger that is used control the flow of water and sand in the suction and discharge pipes of one of these types of dredgers. Dredge Valve CAD Design. There are 3 cases when this vertical valve can block or reduce the mixture flow of water and ...