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Filamos – Mining and Construction Technology

 
Concrete spraying machine SSB 02.1 DUO Concrete spraying machine (gunite machine) TTS-400 Compulsory mixer M 180 COM-F

Shotcreting Machines – series SSB 02

Field of Application

Shotcreting 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.


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The electrically driven shotcreting machines are determined for operations in the places free of a danger from the methane explosion. Therefore, for works to be executed in the methane explosion hazard environment, a concrete spraying machine designed with an air turbine – SSB 14 and SSB 24 COM-A – should be employed.

Manufactured Models

Two basic types of shotcreting machines SSB 02 are produced, differing in the drive and the power control facility.

The machine can be equipped with a two-speed motor or a single speed motor with a variator providing the stepless output regulation. The basic output position of the machine is determined by the rotor size.

Shotcreting machine SSB 02 can be mounted either on a wheel frame or a firm frame. It is a standard that it is equipped with a centralised lubrication system providing automatic lubrication of the abrasion areas.

Model Drive Output regulation
SSB 02 DUO Two-speed electromotor two output positions – switch
SSB 02 COM-V One-speed electromotor smooth – variator

Working Principle

Shotcreting machine SSB 02 works on the principle of pneumatic transport.

Dry Gunning

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 Gunning

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 with the liquid accelerator is taken from the dosing pump (DC 200) to the spraying nozzle instead of mixing water.

The output of the machine is regulated by:

  • the switch control (SSB 02 DUO)
  • the hand-wheel on the variable drive (SSB 02 COM-V)

Technical data

Parameter Small rotor Big rotor
Rotor volume [dm3] 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] 0,6
Motor output [kW] 4,5/6,5; 7,5
Mains connection 3 × PEN 400 V
Transport hoses inside diameter [mm] DN 50, DN 60 DN 60, DN 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
Dimensions 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 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

  • it may be used universally for both dry and wet gunning
  • easy operation and maintenance of the machine
  • stepless output control (COM-V 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
  • low operational costs

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