Method for producing a solar power receiving tube and resulting tube

摘要

The invention relates to a method for producing a solar power receiving tube and to the resulting tube, which is of the type that includes: an outer glass tube, an inner metal absorber through which a heat-transfer fluid flows, and an intermediate area in which the vacuum is produced. The method comprises the following steps:
i. Production of the metal tubesii. Production of the glass tubes: namely a longer central glass tube and two shorter glass tubes for the ends.iii. Process for the production of the Kovar rings or glass-metal transition elementsiv. Process for the welding of the Kovar rings to the tubesv. Process for the production of the bellows or expansion compensating devices assembliesvi. Assembly of the products obtained in the preceding operationsvii. Creation of the vacuum and anodising of the welds.

主权项

1. A method for producing a solar power receiving tube comprising an outer glass tube, an inner metal absorber tube through which the heat-transfer fluid flows, and an intermediate area in which a vacuum is produced, the method comprising the following steps:
producing of the inner metal absorber tube; producing glass tubes for forming the outer glass tube, comprising a longer central glass tube, and two shorter glass tubes for connecting to ends of the longer central glass tube to form the outer glass tube; producing ASTM F-15 rings configured as glass-metal transition elements; welding the ASTM F-15 rings to the shorter glass tubes;
welding the two shorter glass tubes to the longer central glass tube;after the shorter glass tubes are welded to the ASTM F-15 rings and the two shorter glass tubes are welded to the longer central glass tube to form the outer glass tube, the outer glass tube is taken to the sol-gel station and the outer glass tube is cleaned through washing with water or ultrasound;drying the outer glass tube;immersing the outer glass tube in a vat to apply an anti-reflective coating thereto;then reducing a temperature of the outer glass tube;providing a hydrophobic treatment for achieving a water-repellent surface on the outer glass tube;drying the outer glass tube with heat or air; producing expansion compensating assemblies, wherein each of the expansion compensating assemblies includes a bellows-shaped device, a vessel, a cover, an evaporable getter, and non-evaporable getters, the producing process comprises:
welding the bellows-shaped device to the vessel,welding the bellows-shaped device welded to the vessel to the cover,welding an assembly of the non-evaporable getters to the vessel, andassembling the evaporable getter; assembling together the metal absorber tube, the outer glass tube, and the expansion compensating assemblies; creation of the vacuum in the intermediate area; and
anodising welds,wherein prior to welding the assembly of the non-evaporable getters, connecting the non-evaporable getters to a cable, wherein the cable has a closure with a female part and a male part, and joining the female part and the male part after the non-evaporable getters are disposed on the cable, andwherein the assembling of the evaporable getter comprises disposing the evaporable getter to a circular end of a support having a clip.