Patent ID: 8858866

Claim:
A cooling tank for a thermal treatment of a head of a rail, the cooling tank defining a longitudinal axis, the cooling tank comprising at least one longitudinal modulus comprising: a frame having a central volume to be filled with a cooling fluid wherein the head of the rail to be treated is immersed; a delivery manifold for an inlet of the cooling fluid placed in a lower area of the central volume; two second volumes disposed laterally with respect to the central volume for collecting the cooling fluid when the cooling fluid overflows from a top of the central volume; wherein said two second volumes a plurality of pairs of discharge pipes disposed along the longitudinal extension of the two second volumes, the discharge pipes of each pair being connected to a same further pipe, arranged transversal with respect to said discharge pipes of each pair and below a bottom of the at least one modulus and on its turn connected to a blow-by circuit of the cooling fluid; wherein pairs of restraint elements are disposed above the second volumes, each restraint element being locked to a respective discharge pipe, each pair of the restraint elements being adjustable in height and defining a space for the passage of the head of the rail; wherein at least one restraint element of each pair of restraint elements is rotatable around a pin; and wherein the tank comprises a plurality of longitudinal moduli connected in succession to each other at their respective ends.