System and method for spraying lightweight insulating concrete
AssigneeEurl Baumer Damien
InventorDamien Baumer
Life of this patent
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Abstract
A method for coating a support with a lightweight insulating shotcrete, includes preparing the shotcrete by mixing, in predetermined proportions, at least a fibrous aggregate, a binder and water; pouring the prepared shotcrete in a tank; having at least one outlet; continuously moving the wet shotcrete in the tank until it reaches the or each outlet; sucking the wet shotcrete along a feeding pipe linking the outlet of the tank to a spraying gun, with a Venturi hose fed with pressurized air, included in the spraying gun; spraying the sucked shotcrete on the support with the spraying gun.
Claims9
A system for spraying lightweight insulating shotcrete, comprising:
- a container provided with a tank and at least one first worm screw rotatably mounted in the tank, the tank having one primary outlet facing the at least one first worm screw and one secondary outlet positioned next to the at least one first worm screw;
- a spraying gun provided with a barrel, with a Venturi hose comprising a throttled section followed by a diverging section by which the Venturi hose opens in the barrel, with a primary inlet duct and a secondary inlet duct which are symmetrical with respect to the barrel, in which they both open next to the Venturi hose;
- a pressurized air source connected to the Venturi hose;
- one primary feeding pipe connecting the primary outlet of the tank to the primary inlet duct of the spraying gun;
- one secondary feeding pipe connecting the secondary outlet of the tank to the secondary inlet duct,
- wherein, downstream a junction between the primary and secondary inlet ducts and the barrel, the barrel comprises a lower diameter section opening in a greater diameter section.
Dependencies are inferred from the claim text.