CN102466349A

CN102466349A - Spoke type solar vacuum metal heat collection tube

Info

Publication number: CN102466349A
Application number: CN201010535103XA
Authority: CN
Inventors: 杨志勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-09
Filing date: 2010-11-09
Publication date: 2012-05-23
Anticipated expiration: 2030-11-09
Also published as: CN102466349B

Abstract

The invention discloses a spoke type solar vacuum metal heat collection tube. The invention relates to a solar heat collection device, in particular to a medium-and-high-temperature solar heat collection device of which an inner tube is a metal tube and an outer tube is a glass tube. The spoke type solar vacuum metal heat collection tube is characterized in that: an energy absorbing end cover which is connected with the metal inner tube and the glass outer tube consists of a rim and a spoke plate; the metal inner tube and the glass outer tube are hung on the rim through a pulling force of a thin-wall spoke plate; a heat collection tube fixing device can be arranged on the rim, so that a force of a sealing part of glass and metal is reduced; the energy absorbing end cover which consists of the rim and the spoke plate has small influence on the effective heat absorbing area of a heat absorbing tube; the temperature difference of the sealing part of the glass and the metal is small, and an acting force is small; and the service life of the heat collection tube is long.

Description

The solar energy evacuated collector metal pipe of radial

Affiliated technical field

The present invention relates to a kind of solar energy heat collector, particularly a kind of interior pipe is metal tube, and outer tube is the vacuous solar energy heat collector of glass tube, belongs to field of solar energy utilization.

Background technology

At present, the vacuum heat collection pipe that in the utilization of medium and high temperature solar energy, is adopted all is that to compensate the coefficient of expansion huge between metal inner pipe and the glass outer tube with bellows poor; Because bellows radial support power is poor, having limited the bellows wall thickness can not be too thin, in order to guarantee certain stroke; Cause bellows length longer, have a strong impact on effective daylighting area of thermal-collecting tube, and; The endotherm area that bellows is bigger; Cause the bellows temperature higher and glass outer tube sealing-in place temperature difference degree is big, make the fragile gas leakage of sealing-in place; The suffered power of bellows axial deformation has also all directly affacted sealing-in place with glass-tube, has increased sealing-in place spoilage and sealing-in difficulty, makes the medium and high temperature solar pipe can not obtain popularizing and uses.

Summary of the invention

In order to solve in the prior art, big to the effective daylighting area influence of thermal-collecting tube, big, the stressed big flimsy defective of the metal and the glass sealing place temperature difference; The invention provides the solar energy evacuated collector metal pipe of a kind of radial, it utilizes wheel rim and disc formula end cap as energy absorption device, and effectively daylighting area is big; Sealing-in place has a narrow range of temperature; The deformation force that affacts sealing-in place is little, and the thermal-collecting tube spoilage is low, long service life.

The concrete technical scheme that the present invention adopts is: the metal inner pipe close end of thermal-collecting tube is worn and is connected on the disc disc, and glass outer tube end is connected on another disc disc through annular transition material or with the ring device of disc one, or the flange plate-like is processed in glass outer tube end is connected with direct sealing by fusing of another piece disc or press seal etc.; Two disc outers certain interval of being separated by is connected on the wheel rim, and disc only plays the tension effect, and the material wall thickness can be very thin; Wheel rim play supporting role, and adopts pipe cyclic structure reinforcement stress-bearing capability or adopts other annular wheel rim structure, and metal inner pipe and glass outer tube all are suspended on the wheel rim through the tension of disc relatively; Axial relative swing through two thin-walled disc absorbs the differential expansion between metal tube and the glass tube, and the size in wheel diameter and gap, two disc outers is according to the maximum swelling difference decision of metal inner pipe and glass outer tube, because the differential expansion of inner and outer pipes is influenced by inner and outer pipes material therefor, length and serviceability temperature; Wheel diameter can add between the 2-100MM on outer tube diameter base plinth and choose that gap, two disc outers can be chosen between 0-10MM, when thermal-collecting tube adopts single-ended energy absorption device; Gap, two disc outers is got 1/2nd of maximum swelling difference and is the best, and when energy absorption device was adopted at two ends, gap, two disc outers was got 1/4th of maximum swelling difference and is the best; Wheel diameter is to guarantee that the relative swing amplitude gets final product greater than the maximum swelling difference along the place in two disc, and wheel diameter also receives the disc influence of wall thickness, and the disc wall is thick more; The disc vibration is poor more, and the respective wheel loop diameter is big more, in order to increase the disc amplitude of fluctuation; Can increase annular detent or ring-type folding line at inside and outside disc,, satisfy under the preceding topic of differential expansion requirement to increase the disc amplitude of fluctuation; Wheel rim should be as far as possible little; To reduce,, can adopt same apparatus to increase the distortion uptake at the endothermic tube two ends for the straight tubular endothermic tube to the blocking of light; When thermal-collecting tube is vacuumized; Most of deformation force has affacted on the wheel rim, has reduced the active force at glass tube sealing-in position, can also the thermal-collecting tube fixed piovt point be selected on the wheel rim at thermal-collecting tube two ends; The supporting that is fixed of the active force of metal tube is absorbed; It is stressed further to reduce sealing-in place, has reduced simultaneously between two pipes to connect distance, has reduced heat and has scattered and disappeared.

The present invention's advantage compared to known techniques is: adopt wheel rim and disc energy absorption device, sealing-in is flexible, and very little to effective endotherm area influence of endothermic tube, glassy metal sealing-in place has a narrow range of temperature, and active force is little, long service life.

Description of drawings

The solar energy evacuated collector metal pipe of Fig. 1 radial normal temperature vacuum state figure

The state diagram of the solar energy evacuated collector metal pipe of Fig. 2 radial high-temperature vacuum

1. glass outer tubes among the figure; 2. band coating metal inner pipe; 3. outer tube disc; 4. wheel rim; 5. interior pipe disc; 6. blast pipe

Specific embodiments

Specify below in conjunction with accompanying drawing:

In Fig. 1, band coating metal inner pipe 2 one or both ends are being welded to connect pipe disc 5 in the disk shape thin-walled, and the outer of interior pipe disc 5 is connected with wheel rim 4; Outer tube disc 3 and interior pipe disc 5 certain interval of being separated by all is connected on the wheel rim 4, and glass outer tube 1 end is connected on another disc outer tube disc 3 through annular transition material or with the ring device of disc one, or the flange plate-like is processed in glass outer tube 1 end is connected with outer tube disc 3 direct sealings by fusing or press seal etc.; Glass outer tube 1, outer tube disc 3, wheel rim 4, interior pipe disc 5, band coating metal inner pipe 2, connect and compose a confined space successively, vacuumize the back through blast pipe 6 and form vacuum state, inner and outer pipes is suspended on the wheel rim through the tension of disc respectively; Two disc only play the tension effect, and therefore, wall thickness can be very thin; The axial wobble deformation requirements that had both guaranteed disc is beneficial to energy-absorbing, has satisfied the thin-walled sealing-in requirement of glass and metal again, simultaneously; the deformability that thin-walled is good makes that to be delivered to stress on glass less, and the heat that thin-walled transmits also greatly reduces, and wheel rim is the loop configuration that a hollow pipe is processed; pipe inside be vacuum, and intensity is high, and it is few to conduct heat; add the thin-wall construction of superradial; the temperature that is delivered to glass tube sealing-in place is few, and the heat that has also reduced interior pipe scatters and disappears, and can also increase a light shield again at wheel rim and disc outside; can't any influence be arranged to thermal-arrest, greatly reduce again absorb heat and heat lost.Adopt wheel rim, disc endergonic structure, very little to effective daylighting area influence, be employed in the device supporting-point that fixes on the wheel rim at straight pipe two ends; Inner and outer pipe is suspended on the wheel rim at two ends relatively, and the expansive force major part of metal inner pipe has affacted on wheel rim and the fixture, and the active force of glass outer tube is significantly reduced; Add that what link to each other with glass tube all is thin-wall construction; Make the sealing-in position of glass and metal stressed little, significantly reduced the fault rate at this place, thermal-collecting tube prolongs service life greatly.

In the present embodiment, wheel rim can adopt independent structure, also can by inside and outside disc through punching press, folding, curved or welding after; Be made of one device and constitute, its structure is not limited in the annular that pipe constitutes, the wheel cast that also can adopt different shapes such as straight tubular, circular arc, triangle, V font to constitute; Can inner and outer pipe be suspended on the wheel rim, torsional deformation when stressed, not occur and get final product, can inwardly suppress some round pools on the inner and outer pipe disc; When preventing to vacuumize; The inner and outer pipe disc is drawn onto together, on the inner and outer pipe disc, can increase annular detent or ring-type folding line, to increase the disc amplitude of fluctuation.

The present invention can be provided with getter in the vacuum space between outer tube and the interior pipe, the vacuum in using with further assurance.

When the present invention uses in the multitube series connection; Can with supporting be made on the wheel rim at thermal-collecting tube two ends and relatively support fix; Available bellows or U-shaped pipe connect between adjacent two collector metal pipes; To eliminate the expansion of metal inner pipe, affact expansive force on the glass outer tube support that is fixed and absorb, and can be not influential to the glass outer tube.

Wheel rim of the present invention is different with web pattern and bellows endergonic structure; Being that also metal inner pipe is on the axis that can be arranged on the glass outer tube; Also can be biased in optional position in the glass outer tube; Thereby adapt to the requirement of internal light-concentrating device, process various forms of interior light-gathering heat collection pipes, and do not influence effective daylighting, endotherm area.

The present invention except that can be used for medium and high temperature solar energy, in, in the cryogenic applications since metal straight-through in the application of pipe; Can conveniently link to each other with the storage tank that splits, help the circulation of water, and can adopt interior optically focused through pipeline; Tubule neck thermal-collecting tube; Reducing water capacity, or adopt air etc. in the middle of other heat medium alleviate heat collector weight, heat collector can hang over balcony and wall outside arbitrarily; Satisfy the warm up needs of solar airconditioning of hot water and ground, solved the difficult problem of skyscraper Application of Solar Energy.

Can increase various fins in the metal inner pipe of the present invention, further increase heat and transmit absorbability, pipe and shower nozzle are processed steam generator usefulness in also can in metal inner pipe, being provided with again.

Metal inner pipe of the present invention outside also can increase various fins, to increase endotherm area.

The present invention also can stretch out outer tube part through pipe in extending, and processes heat pipe and uses.

Claims

1. solar energy evacuated collector metal pipe of radial that utilizes solar energy; Comprise: metal inner pipe, glass outer tube, energy-absorbing end cap, blast pipe; It is characterized in that: the energy-absorbing end cap that connects metal inner pipe and glass outer tube is made up of wheel rim and disc, and metal inner pipe is worn and is connected on the disc disc, and glass outer tube end is connected on another disc disc through annular transition material or with the ring device of disc one; Or the flange plate-like is processed in glass outer tube end directly be connected with another piece disc again; Two disc outers all are connected on the wheel rim, and metal inner pipe and glass outer tube are suspended on the wheel rim through the pulling force of disc.

2. the solar energy evacuated collector metal pipe of radial according to claim 1 is characterized in that: the energy-absorbing end cap that is made up of wheel rim and disc is arranged on the one or both ends of thermal-collecting tube.