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(Image: Flushing vehicle – Remote control) (Image: Super 2000 Remote control sender unit) (Image: HP flushing vehicle remote control reciever unit) |
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Main types of discharge systems: (Image: Sewer cleaning vehicle discharge system - High dump) High dump (Image: Sewer cleaning vehicle discharge system - Hydraulic piston) Hydraulic piston (Image: Sewer cleaning vehicle discharge system - Pneumatic) Pneumatic (Image: Sewer cleaning vehicle discharge system - Auger) Auger |
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(Image: Wiedemann & Reichhardt "Super 2000" emptying its sludge tank) |
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Influence of the water tank placement on vehicle safety. (Image: High dump - Placement of the water reservoir:Low centre of gravity)
(Image: High dump - Placement of the water reservoir:High centre of gravity)
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(Image: High dump discharge system) Warning: not suitable for the transportation of materials listed under the dangerous goods ordinance!
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(Image: Sewer cleaning vehicle discharge system - Hydraulic piston)
Information of the company Wiedemann & Reichardt [FI-Wiede] |
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(Image: Sewer cleaning vehicle discharge system - Pneumatic) |
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(Image: Sewer cleaning vehicle discharge system - Auger) (Image: Discharging by auger )
(Image: Discharging by auger ) (Image: Discharging by auger ) |
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One tank system (Image: Mass distribution in a one-tank systems at the beginning of cleaning) Axle load before the cleaning operation (Image: Mass distribution in a one-tank systems at the end of cleaning) Axle load after the cleaning operation Two tank system (Image: Mass distribution in a two-tank systems) |
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As there are many types of chassis and powertrains available, their selection is based on the final application of the cleaning vehicle. The cleaning equipment is powered by the vehicle's main engine through an independent gearbox, or by an auxiliary power drive. Criteria for the selection of the chassis according to [KA 4/97]1:
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[KA 4/97] |
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(Image: Criteria for the selection of the chassis and powertrain [Bild S&P GmbH]) |
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(Image: Economic analysis of high pressure cleaning vehicles 1) |
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(Image: Economic analysis of high pressure cleaning vehicles 2) |
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The selection of the most economical vehicle type can only be made in conjunction with a comprehensive operational concept for the cleaning of the planned drains, sewers and various structures within the drainage system. |
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Depending on the vehicle type, there exist
or both types of pumps can be used at the same time. (Image: HP piston pump) (Image: Vacuum pump) Images: High-pressure piston pump (left) und vacuum pump (right) [Image: Prof. Dr. Ing. Stein & Partner GmbH] |
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(Table: High-pressure pumps as per [KA 4/97 ]) |
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The pumps are arranged behind the driver's cab and are driven by the vehicle's engine through an independent transmission and v-belt. (Image: Pumps drive system) |
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The pumps installed in the vehicles have to meet the following performance requirements [ATV/VKS] [Gütes03] [FI-Müller]. (Table: Performance parameters and standard values for high-pressure pumps subject to the nominal size of the sewer) |
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Piston pumps, also called plunger pumps, are the most commonly used types of pumps in cleaning vehicles (Animation). Occasionally, a hydraulically driven high-pressure water pump that directly converts oil pressure into water pressure is used [Geib2002]. (Image: Piston pump components) (Video: Ventil of the high-pressure plunger pump) |
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(Table: Comparison of the types of high-pressure pumps used in cleaning vehicles) |
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(Table: High-pressure pumps) |
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Removing the accumulated waste material from the respective manholes is of essential importance for the success of the sewer cleaning procedure. Vacuum pumps with 0.6 bar negative pressure and induced volumetric flow rate of 680 m3/h to 4,000 m3/h are usually used for this purpose. (Image: Liquid ring pump - Detail) (Image: Liquid ring pump - front view) (Video: Rotary vane pump) |
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