Gunite machine (concrete spraying machine) – SSB 05

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Field of Application

Gunite machine SSB 05 is designed for spraying of concrete and refractory mixtures in a so-called dry, eventually wet method. This machine works on the rotor principle. The SSB 05 gunite machine provides a gunite capacity of 0.5 – 7.1 m³/h and is suitable for small and medium-size jobs.

Gunite machine SSB 05

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This machine finds its main applications in the spraying of refractory concrete mixtures during the lining of metallurgic and glassworks furnaces, heating plant boilers, coke-oven batteries, etc.; in the metallurgic, chemical and glass working industries. It is also used to maintain concrete structures (e.g. road and railroad bridges, abutment walls, cooling towers, water reservoirs, sewerage plants, etc.); during the construction and reconstruction of buildings and during the reinforcement and bracing of tunnel vaults and sewers.

Manufactured Models

The gunite machine SSB 05 is driven either by two-speed electromotor with two output levels (DUO version), or by one-speed electromotor with fluent output regulation (COM-V, COM-F versions), eventually by air turbine with fluent output regulation (COM-A). Its standard equipment includes central lubrication system that ensures the automatic greasing of all abrasion-prone surfaces. Greasing process is either manual (lever), or automatic.

Depending on the nature of concrete used, a small, medium or large dosing drum is employed. The small drum is recommended for the spraying of fine, dry and heavy mixtures (e.g. refractory concrete, fine prefabricated mixtures). For spraying in so-called wet method, dosing drum MAXI (7,9 l) shall be used.

Model	Drive	Output regulation
DUO	Two-speed electromotor	two output levels – switch
COM-V	One-speed electromotor	smooth – ballast variator
COM-F	One-speed electromotor	smooth – frequency inverter
COM-A	Air turbine	smooth

Working Principle

Gunite machine SSB 05 works on the principle of pneumatic transport of concrete mixture.

Dry method

The dry mixture for spraying or transportation is poured in 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 hoses. The hoses are equipped with the 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 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 for addition of chemical additives (e. g. accelerating admixture) is taken from the external dosing pump DC 200 to the spraying nozzle instead of mixing water.

Technical data

Parameter	Dry method spraying			Wet method spraying
Rotor volume [l]	1,9	3,9	6,9	7,9
Theoretical output *) [m³/h]	0,25 – 1,5	0,5 – 3,0	0,9 – 5,4	2,3 – 7,1
Air consumption **) (transport distance of 40 m) [m³/min]	3 – 5			10 – 15
Air pressure [MPa]	0,5 – 0,6			0,5 – 0,6
Motor output [kW]	3			3
Mains connection	3 × PEN 400 V			3 × PEN 400 V
Transport hoses inside diameter [mm]	DN 25/32/40/50			DN 40/50
Granularity of transported material [mm]	8 (DN 25/DN 32); 16 (DN 40/50)			4 – 8
Max. moisture of material [%]	6			x
Degree of consistency	x			S4
Horizontal transport distance [m]	max. 300			max. 40
Vertical transport distance [m]	max. 100			max. 5 – 10
Water hose inside diameter [mm]	DN 20			x
Supply of additives [mm]	x			DN 20
Minimum water pressure at nozzle [MPa]	0,3			x

Dimensions	SSB 05 (COM-F version)
Length [mm]	1600
Width [mm]	750
Height [mm]	1250
Weight (with no accessories) [kg]	450

*) These are theoretical values only. The actual output depends on the design of 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.

Advantages

Excellent operating capacity during the transport of heavy, dry and fine concrete mixtures (refractory concrete, fine prefabricated mixtures)
Usable for both wet and dry spraying technology
Long service life of consumption parts (sealing and wearing plates) ensured by the application of central lubrication system
output control
possibility of remote control
low operational costs
easy operation and maintenance of the machine
robust structure enables work in demanding conditions