Concrete spraying machine SSB 02 works on the rotor principle and it is designed for the processing of dry or wet mixtures. It is the most efficient model of the shotcreting machines (concrete spraying machines) series SSB and it is appropriate to execute works of medium and large scope. It is used, in particular, to reinforce surfaces of engineering structures and the construction of water works, to reinforce the vaulting of tunnels and collectors in underground engineering and to maintain concrete constructions.
The SSB 02 concrete spraying machine is driven either by a two-speed motor with two power positions without the possibility of additional control (DUO version), or by a single-speed electric motor with the possibility of continuous output control (COM-F) or by an air turbine with continuous output control (COM-A). It is a standard that it is equipped with a centralised lubrication system providing lubrication of the abrasion areas. The lubrication process itself is solved either by a manual lever press or automatically.
ADVANTAGES
- it may be used universally for both dry and wet gunning
- easy operation and maintenance of the machine
- stepless output control (COM-F model)
- belt drive preventing damage of the drive in case of impulse stoppage of the machine
- long service life of spare parts (sealing and wearing plates) due to the use of centralised lubrication system
- robust structure enables work in demanding conditions
Working principle
Shotcreting machine SSB 02 works on the principle of pneumatic transport.
Dry method
The dry mixture for spraying or transportation is poured into the machine and smoothly fills the cylinders of the rotor below the hopper. To fill a mixture into the rotor more easily, a vibrator and a rippling are fitted in the hopper. The rotating movement of the rotor moves the mixture along by 180° in the clockwise direction. The mixture is thus blown out from individual cylinders of the rotor into transport hoses. As the mix passes through the blower into the transport hoses, lower pressure air is added to enhance the continuous flow of the material in the hoses. The hoses are equipped with spraying nozzles at the end, into which the mixing water is fed at the same time to wet the transported mixture. The required wetting of the mixture is controlled with the supply cock.
Wet method
When the concrete mixture is applied in the so-called wet method, the hopper is filled in with the prepared wet mix. In principle, the mix passes through the machine in the same way as when spraying the dry mixture. A hose with the liquid accelerator is taken from the dosing pump DC 200 to the spraying nozzle instead of mixing water.
MANUFACTURED MODELS
The SSB 02 concrete spraying machine is manufactured in three basic designs, differing in the type of drive and output regulation options.
| Model | Drive | Output regulation |
| DUO | Two-speed electromotor | two output positions – switch |
| COM-F | One-speed electromotor | smooth-frequency inverter |
| COM-A | Air turbine | smooth |
Technical data
| Parameter | Small dosing rotor | Big dosing rotor | ||
| Rotor volume [l] | 13,5 | 21,9 | ||
| Theoretical output *) [m3/h] | 2 - 10 | 3 - 16 | ||
| Air consumption **) (transport distance of 40 m) [m3/min] | 6 - 8 | 8 - 14 | ||
| Air pressure [MPa] | 0,5 - 0,6 | |||
| Motor output [kW] | 4,5 / 6,5 ; 7,5 | |||
| Mains connection | 3 × PEN 400 V | |||
| Transport hoses inside diameter [mm] | DN 50, 60 | DN 60, 65 | ||
| Granularity of transported material [mm] | 16 | 20 | ||
| Max. moisture of material [%](dry gunning) | 6 | |||
| Horizontal transport distance (dry/wet gunning) [m] | 250 / 40 | |||
| Vertical transport distance (dry/wet gunning) [m] | 100 / 15 | |||
| Water hose inside diameter [mm] | DN 20 | |||
| Minimum water pressure at nozzle [MPa] | 0,3 | |||
SIZE AND WEIGHT
| Parameter | SSB 02 |
| Length [mm] | 1620 |
| Width [mm] | 990 |
| Height [mm] | 1480 |
| Weight (with no accessories) [kg] | 950 |
*) These are theoretical values only. The actual output depends on the design of the transported mixture, the capacity of the source of the compressed air, the transport distance, and the diameter of the transport hose.
**) The data regarding the consumption of air is only approximate and depends on the momentary output of the machine, the transport distance, and the diameter of the transport hose.
Photogallery
Practical demonstration
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