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A Symmetrical Concentrated Force and Uniform Load Coupled Hot Bending Forming Device and Its Application

A technology of uniform load distribution and concentrated force, applied in the field of solar energy, can solve the problems of reducing the specular reflection ability of solar radiation in high-energy bands, cost constraints on solar heat utilization, and surface distortion, etc., to achieve strong elastic self-restraint ability, small stress deformation, The effect of preventing temperature unevenness

Active Publication Date: 2017-07-18
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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  • A Symmetrical Concentrated Force and Uniform Load Coupled Hot Bending Forming Device and Its Application
  • A Symmetrical Concentrated Force and Uniform Load Coupled Hot Bending Forming Device and Its Application
  • A Symmetrical Concentrated Force and Uniform Load Coupled Hot Bending Forming Device and Its Application

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 hot bending forming device for preparing a condenser lens, such as 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 resis...

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 uniform load coupled thermal bending forming device, which includes a mold frame and a concentrated force loading unit. The mold frame is a hollow structure as a whole, including a base, a support frame and a limit beam. The concentrated force loading unit includes an upper fixing device and a lower fixing device. The upper fixing device includes an upper fixing channel steel and a first high-temperature-resistant glass wool arranged in sequence, and the lower fixing device includes a second high-temperature-resistant glass wool and a first high-temperature-resistant glass wool arranged in sequence. The lower fixing channel steel is provided with a shackle in the middle of the lower fixing channel steel, and the upper fixing device and the lower fixing device are fixedly connected by fixing bolts; both the upper fixing device and the lower fixing device are fixed by channel steel, and the channel steel has Stronger strength, less stress deformation. The invention prepares the concentrator through thermoforming coupled with symmetrical concentrated force and uniform load, and the surface curve of the prepared concentrator is a compound curve formed under the coupling action of concentrated load and uniform load, and the curve is a 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 Patents(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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