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1. A parabolic concentrating solar collector, includes a parabolic reflective surface associated with programmed and/or calculated solar tracking in real time, as well as an element on which solar radiation is concentrated, wherein the element is made of a vacuum tube, with a corresponding duly insulated inlet and outlet of fluid to be heated, wherein the vacuum tube is statically arranged on a frame, the parabolic reflective surface pivotable with respect to an imaginary central longitudinal axis of the vacuum tube, in which bushings or bearings through which the pipes associated with the inlet and outlet of the vacuum tube pass participate, unaffected by the pivotable movement of the parabolic reflective surface, wherein the chamber through which the fluid to be heated circulates in the vacuum tube is subdivided into two concentric chambers, an internal chamber, through which the cold fluid is fed, open at one ends through which the internal chamber communicates with an external chamber, concentrically positioned, on which solar radiation is concentrated inside the vacuum tube, wherein an inlet section to the internal chamber is an outlet section of the external chamber and wherein the parabolic reflection surface includes passive safety means against strong winds, made up of sectors, of a reflective nature, as folding gates with respect to axes against the tension of a spring, and wherein the parabolic reflective surface is linked to a structure of the vacuum tube through lateral ends by arms that converge in a bearing or bushing axial to the imaginary central longitudinal axis of the vacuum tube, wherein in correspondence with the inlet and outlet of the vacuum tube, the arms are integral with a ring, which is integral with a toothed wheel with which a pinion associated with a small electric motor engages, integral with the structure of the vacuum tube.
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