The term suction dredger called three different types of heavy machinery of civil engineering and water engineering for the degradation of mineral building materials as well as mineral and raw materials.
- 2.1 Working principle
Suction dredger ( watercraft )
Suction dredger with drive
It involves a self-propelled dredger for use in ports, waterways or at sea, with the aid of a milling head (cutter excavator ) or a drag head ( hopper dredger ) the sediment dissolves in the river bed and sucked by a suction line on board. The water fraction is separated and deposited again into the water; the solid constituents of Saugguts be either pumped into a barge or in the hold of the ship itself is filled ( the hold -suction dredger ) and transported or directly to nearby wash trays.
Suction dredge without drive
For sand and gravel extraction in gravel pits a pontoon with suction device for gravel or sand is used, which are sucked under the water at the bottom of the water. The proportion of water is re- deposited into the water, the solid constituents of Saugguts be transported via a conveyor belt on land and stored there until the evacuation.
Suction dredger ( machinery on land )
A suction dredger (English: Suction excavator ), is a serious construction machine with a weight between 18 and 40 tons. In its functionality, a suction dredger is an oversized vacuum cleaner the same. It solves a variety of materials from the soil, for example, Soil, clay, gravel, crushed stone, water and mud.
Suction dredgers are used wherever a high risk of damage to the use of hydraulic excavating equipment prohibits or the environmental conditions do not permit this.
Possible applications are for example in pipe and fitting replacement, burst pipes, renovation and new installation of gas, water, cable, district heating and waste pipes, road departures, maintenance and repairs in the track area, the use of soil displacement missiles, the remediation of environmental damage, the exchange of contaminated soil in the root zone of trees, demolition, Kiesabsaugen of flat roofs, cleaning of road gullies and gullies in conjunction with horizontal drilling systems, Laubabsaugung and special use cases.
Suction dredge permit short periods of use, fast excavation damage-free and low traffic and environmental impacts.
A fan generates an air flow of up to 44,000 m³ / h and a maximum. Under pressure of 55,000 Pa. The suction tube is hydraulically movable three-dimensionally on the support. In the area of the suction crown material is entrained by the air stream. Be sucked all media, solid particles up to a size of 250 mm. In the plenum due to the plenum and rotation is a deposit of all material particles. Deposition chambers on the air current is further cleaned and dried. The location of the collector determines the axle load of the vehicle. Over the last Feinstfiltereinheit dusts are absorbed. The cleaned air is discharged through a large surface acoustic assembly upward. The cleaning of the fine filter by means of compressed air. When tipping next collection chamber and the deposition chambers and the fine filter to be emptied. All body functions are controlled via a cable remote control or via a remote control.
A suction dredge is very economical for civil engineering company: When using a suction dredge can be achieved in the same period 12 times the performance compared to manual work and therefore time and cost savings of more than 60%.