Symmetrical concentrated force and uniformly distributed load coupling bending forming device and application thereof

A technology of uniform load distribution and concentrated force, applied in the field of solar energy, can solve problems such as surface distortion, contact damage, and cost constraints on solar heat utilization

Active Publication Date: 2015-09-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional parabolic mirror molding technology scheme, the method of heating the glass to a temperature above its softening point to make it collapse and fit the mold can ensure the accuracy of the surface shape, but because the glass surface is in contact with the mold at too high a temperature Causes contact damage and reduces its specular reflectance of high-energy band solar radiation
However, due to the existence of suspended parts, multi-point support molds such as grids, ribs, and flexible rollers are likely to cause surface distortion
The high cost of traditional glass concentrators is also an important factor restricting the utilization of solar heat

Method used

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  • Symmetrical concentrated force and uniformly distributed load coupling bending forming device and application thereof
  • Symmetrical concentrated force and uniformly distributed load coupling bending forming device and application thereof
  • Symmetrical concentrated force and uniformly distributed load coupling bending forming device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1 is used to prepare a hot-bending forming device for a condenser.

[0053] The invention provides a thermal bending forming device for preparing a condenser lens, like figure 1 As shown, it includes a mold frame and a concentrated force loading unit, wherein the mold frame is a hollow structure as a whole, including a base 1, a support frame 2 and a limit beam 3, wherein the support frame 2 is arranged at both ends of the base and is perpendicular to the base , the two support frames are fixedly connected by a support beam 4, and a limit beam 3 is erected between the two support beams 4, and the limit beam 3 is used to control the crown height of the prepared condenser. The mold frame is welded by square steel or angle steel. The support surface at the top of the support frame forms an included angle with the glass plate to be processed in the range of 30-60°C. The support surface at the top of the support frame is covered with a layer of high-temperature re...

Embodiment 2

[0055] Example 2 A condenser lens is prepared under the coupled action of symmetrical concentrated force and uniformly distributed load.

[0056] The present invention utilizes the coupling effect of symmetrical concentrated force and uniformly distributed load to prepare the concentrator, and the manufacturing method steps are glass type selection—glass entering the furnace—installation of the concentrated force application unit—position control through the limit beam of the mold frame, and the bending temperature Control, annealing with the furnace to complete the hot bending forming process - glass surface shape verification - edge trimming - coating, etc.

[0057] Specific steps are as follows:

[0058] (1) According to the requirements of the hot-bending condenser, select a low-iron soda-lime glass plate with a thickness of 4mm, an error of ±0.2mm, a span of 1500mm, and an error of ±2mm. In terms of the geometric dimensions of the glass condenser, a glass original sheet ...

Embodiment 3

[0066] Example 3 Condenser performance test.

[0067] (1) Roughness test

[0068] Statistical analysis of the roughness Ra values ​​of 10 condenser lenses before and after hot bending obtained by hot bending under the action of pure uniform load of the same hollow mold in the early stage by using the high-precision roughness tester Mahr Perthometer M1 (with PFM drive unit) made in Germany . The results show that the average value of glass roughness before bending is 10.7nm, and the total average value after bending is reduced to 10nm, which shows that the condenser lens has excellent surface properties.

[0069] (2) Symmetrical concentrated force and uniform load coupled thermoformed condenser lens concentrating effect

[0070] Concentration analysis was carried out for a loading scheme with b = 0.15m. Firstly, the solid modeling of the solar concentrator is carried out through SolidWorks, and then the solid model is imported into Tracepro optical software for optical traci...

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Abstract

The invention provides a symmetrical concentrated force and uniformly distributed load coupling bending forming device. The device comprises a die frame and a concentrated force loading unit, an integral body of the die frame is in a hollow structure, and comprises a pedestal, a bracing frame and a spacing beam. The concentrated force loading unit comprises an upper fixing device and a lower fixing device, the upper fixing device comprises an upper fixing channel steel and a first high temperature resistance glass wool which are arranged in order, the lower fixing device comprises a second high temperature resistance glass wool and a lower fixed slot steel which are arranged in order, a hook ring is arranged at central section of the lower fixed slot steel, the upper fixing device and the lower fixing device are fixedly connected through a fixing bolt; the upper fixing device and the lower fixing device are fixed by employing the slot steel, the slot steel has stronger intensity and less bearing deformation. According to the invention, a condenser is prepared by coupling symmetrical concentrated force and uniformly distributed load and then performing thermal forming, the surface curve of the prepared condenser is the composite curve formed under coupling effect of symmetrical concentrated force and uniformly distributed load, and its curve is the segmented high order curve.

Description

technical field [0001] The invention belongs to the field of solar energy, and relates to a thermal bending forming device for solar concentrating mirrors, in particular to a thermal bending forming device coupled with symmetrical concentrated force and uniform load and its application in preparing concentrating mirrors. Background technique [0002] As a renewable and clean energy, solar energy has received more and more attention under severe situations such as energy shortage, climate warming, and ecological environment deterioration. After about 20 years of market cultivation, the scale of my country's solar thermal utilization industry has reached the level of 100 billion yuan, and has begun to enter the industry development window with medium and high temperature thermal utilization as the new direction. [0003] In the traditional parabolic mirror molding technology scheme, the method of heating the glass to a temperature above its softening point to make it collapse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/025
Inventor 匡荛叶超峰潘杭萍范毅闫建璐吴丹丹
Owner SOUTHEAST UNIV
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