Device for cooling a turbine casing with air jets

A device for cooling a turbine casing by air jets, preferably a low-pressure turbine casing of a turbomachine, comprising a pressurized air supply housing and at least one cooling line comprising two cooling pipes arranged on each side of said housing, said housing comprising a bottom, two longitudinal side walls, two upstream and downstream end walls and an upper wall, and said bottom of the housing being pierced by air injection orifices arranged so as to open toward the casing around which said cooling device is intended to be arranged, each cooling pipe being curved, arranged around a part of the casing and at a distance therefrom and being provided with air injection orifices opening toward the casing, wherein each of said side walls extends outward via at least one tubular sleeve integral with said side wall, wherein each sleeve is arranged on said side wall so that its bottom is at the same level as said bottom of the housing at the place where they join and wherein each sleeve is configured and dimensioned so that one of the cooling pipes may be connected thereto.