4
5. Description of the machine
5.1
Functional description
The drive shaft powers a compressor which generates negative pressure (vacuum) in the tank container.
By connecting a suction hose to the quick coupler, the slurry can be sucked into the tank by means of the negative
pressure. A siphon and additional siphon prohibit over-suction in the slurry tank, thereby preventing contamination of the
compressor during the suction process. The filling speed can be increased with a turbo filler. The slurry is discharged by
means of the positive pressure, which is also generated by the compressor. The pressure relief valve (compressor) is
configured at the factory. The valve is factory-sealed to prevent manipulation of the setting. It stops the pressure rising
above the permissible value of 0.5 bar. A positive/negative pressure relief device is located at the top of the tank as
standard.
For large spreading widths, the output can be increased with the aid of a discharge accelerator.
To prevent excessive sloshing during travel, baffle plates are used in the vacuum tank.
5.1.1
Suction process
Suction:
When the compressor is set to suction position, negative pressure is created in the tank container.
The resulting vacuum causes the substrate to be sucked into the tank.
In combination with the foam separator, the siphon prevents over-suction of slurry into the compressor.
5.1.2
Discharge process
Discharge:
When the compressor is set to pressure position, air flows into the tank container.
The resulting positive pressure causes the substrate to be pressed into the spreader.
A pressure relief valve ensures that a maximum pressure of 0.5 bar is not exceeded during discharge.
1.
Vacuum compressor
2.
Compressor air outlet
3.
Pressure relief valve
4.
Foam separator
5.
Pressure gauge for negative
pressure control
6.
Siphon
7.
Negative pressure
8.
Suction valve
9.
Suction line
1.
Vacuum compressor
2.
Compressor air inlet
3.
Pressure relief valve
4.
Foam separator
5.
Pressure gauge for positive pressure
control
6.
Siphon
7.
Positive pressure
8.
Slurry under pressure
9.
Spreader
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