COMPUTERIZED OPEN SURFACE TILTING FLOW CHANNEL A transparent, inclinable flow channel through which water can be recirculated by a pump over a mobile bed to demonstrate the whole range of bedforms from incipient particle movement to bed wash-out The channel slope can be adjusted within the range 0-10%
Tempered glass sides, 6mm thickness,
Stainless steel bed,
Working section of: 300mm deep x 450mm height,
Lenght: 20m.
Fill and stilling tank: made of stainless steel
Capacity: 0,6 m equipped with a manally operated vertical gate to
Vary the height of the hydraulic head Collection tank: made of stainless steel capacity: 3 m Supporting frame
Made of stainless steel rectangular tube, section 60x80x3mm
Descharge sluice gate: made of anodized aluminum and PVC manually adjustable
Electrically controlled system to regulate the channel slope between -1- +3, composed of: axial geared type motor equipped with 0,55 kW engine automatic breaking speed 1450 n/1 educer drive 1:5140
Electric limit switch to limit the slope of the channel for safety reasons
Electrically operated centrifugal pump, with the following characteristics: monoblo centrifugal pump direct coupling engine-pump single axe
Power 3kW max flow rate 150 m/h max head 9m HO
Valve to control pump suction
Flow rate regulating valve
Flow meter direct reading with calibrated diaphragm
Guide rails along all channel lenght equipped with sliding
Trolley to allow the optional component assembly
The electric control board should include:main switch safety devices
On/Off pump control Slope regulation switches (clockwise and couter clockwise rotation modes)
Computerization of the unit should include:
Feeding and signal conditioning unit along with A/D
board that should: allow the A/D conversion of signals coming from transducers be connected to a PC through an USB port
Electronic transducer to measure the flow level along the channel, equipped with:digital indicator signal transmitter
Measuring range: 0,38m
Precision:1%
Electronic transducer to measure water speed along the channel, equipped with: digital indicator signal transmitter compact box
two measuring sensors turbine type, with the following characteristcs: five blades rotor, made of PVC, assembled on a stainless steel shaft
Low speed sensor: range: 5150cm/s precision: 2% of real speed
Max immersion lenght: 420 mm high speed sensor: range: 60300cm/s
Precision: 2% of real speed max immersion lenght: 420 mm
Data acquisition and analysis software
The PC (not supplied) should have minimum the following characteristics: Pentium minimum
Hard Disk (>10Gb)
CD drive
Graphic board SVGA
mouse
RAM 32 MB
USB port
MS-Windows seven or previous versions
Graphic printer[5] It should be possible assemble the optionals on different point of the channel lenght
Services:
Electrical feeding: 380V, triphases + N, 50/60 Hz, 7 kW