An absorber tube is provided that includes a metal tube, a glass sleeve tube surrounding the metal tube, and a glass-metal transition element is disposed on at least one end. The metal tube and the transition element can be moved relative to one another in the longitudinal direction and connected to
An absorber tube is provided that includes a metal tube, a glass sleeve tube surrounding the metal tube, and a glass-metal transition element is disposed on at least one end. The metal tube and the transition element can be moved relative to one another in the longitudinal direction and connected to one another by an expansion compensating device. An inner end of the expansion compensating device is fastened to an attachment element, which is connected to the transition element. An outer end of the expansion compensating device is fastened to the metal tube. An annular space section of the annular space is constructed between the transition and attachment elements. The attachment element has an annular disc on which the expansion compensating device is fastened. The absorber tube has at least one shielding device that has a first annular disc-shaped section disposed on at least one end in the annular space.
대표청구항▼
1. An absorber tube comprising: a central metal tube;a glass sleeve tube surrounding the central metal tube;a glass-metal transition element disposed on an end of the glass sleeve tube, wherein the central metal tube and the glass-metal transition element are movable relative to one another in a lon
1. An absorber tube comprising: a central metal tube;a glass sleeve tube surrounding the central metal tube;a glass-metal transition element disposed on an end of the glass sleeve tube, wherein the central metal tube and the glass-metal transition element are movable relative to one another in a longitudinal direction and connected to one another by an expansion compensating device, the expansion compensating device being disposed at least partially in an annular space between the central metal tube and the glass-metal transition element, the annular space having an annular space section constructed between the glass-metal transition element and the attachment element, wherein the expansion compensating device having an inner end and an outer end, the inner end being fastened to an attachment element, the attachment element being connected to the glass-metal transition element, the outer end being fastened to the central metal tube, wherein, in axial plan view, the attachment element and the expansion compensating device have a circular ring-shaped end face, wherein the attachment element has an annular disc on which the expansion compensating device is fastened; anda shielding device separate from the attachment element, the shielding device having a first annular disc-shaped section, the shielding device being disposed in the annular space, wherein, in the axial direction, the annular disc-shaped section is disposed with a spacing before the end face. 2. The absorber tube according to claim 1, wherein the annular disc has an inner edge with an inner radius (R3) on which the expansion compensating device is fastened. 3. The absorber tube according to claim 2, wherein the first annular disc-shaped section has an inner radius (R1) that is greater than or equal to the inner radius (R3). 4. The absorber tube according to claim 2, wherein the expansion compensating device has an inner radius (R2) that is greater than or equal to the inner radius (R3). 5. The absorber tube according to claim 1, wherein the annular disc has a first bead on which the expansion compensating device is disposed. 6. The absorber tube according to claim 1, wherein the first annular disc-shaped section is inclined by an angle with respect to a perpendicular on of a central axis, the angle being greater than or equal to 0. 7. The absorber tube according to claim 6, wherein the first annular disc-shaped section is inclined in such a way that a radially outer edge protrudes axially further into the annular space than an inner edge of the first annular disc-shaped section. 8. The absorber tube according to claim 1, wherein the shielding device extends at least partially into the annular space section. 9. The absorber tube according to claim 1, wherein the first annular disc-shaped section has a radially outer edge that merges into a first tubular section, which extends into the annular space section. 10. The absorber tube according to claim 9, wherein the first tubular section is of cylindrical or conical construction. 11. The absorber tube according to claim 9, wherein the first tubular section is disposed spaced apart from the attachment element. 12. The absorber tube according to claim 9, wherein the first tubular section contacts the attachment element. 13. The absorber tube according to claim 12, wherein the first tubular section and the attachment element each have at least one fourth bead and a third bead that engage in one another. 14. The absorber tube according to claim 1, wherein the shielding device has a second annular disc-shaped section that bears against the glass-metal transition element or the attachment element. 15. The absorber tube according to claim 1, wherein the shielding device has a third annular disc-shaped section and the glass-metal transition element has an annular step on which the third annular disc-shaped section is supported. 16. The absorber tube according to claim 15, wherein the second annular disc-shaped section separates the annular space section and an annular space is disposed between the second annular disc-shaped section and an annular disc section of the attachment element. 17. The absorber tube according to claim 16, further comprising a getter disposed in the annular space section. 18. The absorber tube according to claim 1, further comprising, on an outside of the sleeve tube, an outer protective cap that covers the glass-metal transition element. 19. An absorber tube comprising: a central metal tube;a glass sleeve tube surrounding the central metal tube;a glass-metal transition element disposed on an end of the glass sleeve tube, wherein the central metal tube and the glass-metal transition element are movable relative to one another in a longitudinal direction and connected to one another by an expansion compensating device, the expansion compensating device being disposed at least partially in an annular space between the central metal tube and the glass-metal transition element, the annular space having an annular space section constructed between the glass-metal transition element and the attachment element, wherein the expansion compensating device having an inner end and an outer end, the inner end being fastened to an attachment element, the attachment element being connected to the glass-metal transition element, the outer end being fastened to the central metal tube, wherein, in axial plan view, the attachment element and the expansion compensating device have a circular ring-shaped end face, wherein the attachment element has an annular disc on which the expansion compensating device is fastened;a shielding device having a first annular disc-shaped section, the shielding device being disposed in the annular space, wherein, in the axial direction, the annular disc-shaped section is disposed with a spacing before the end face; anda holder on which a protective gas container or an indicator getter spring is disposed, the holder being fastened on the attachment element. 20. The absorber tube according to claim 19, wherein the first annular disc-shaped section has a section or an opening for the passage of the holder and/or the holder and the protective gas container or the indicator getter spring.
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이 특허에 인용된 특허 (3)
Kuckelkorn,Thomas; Doenitz,Fritz Dieter; Benz,Nikolaus, Absorber pipe for solar heating applications.
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