CN102495440A - Solar-energy cambered-surface reflector machinery bending molding method - Google Patents

Abstract

A method for mechanical bending and forming of a solar curved reflector. The plane mirror is placed on the support surface of the mirror holder, and the support surface is evenly coated with a cream-like adhesive medium at room temperature. The support surface of the mirror holder is a non-continuous pseudo-arc The shape of the quasi-arc surface is consistent with the shape of the arc reflector to be manufactured, and the plane mirror and the support surface are closely attached together by external mechanical force. The invention is simple and practical, and can be manufactured under normal temperature and pressure conditions.

Description

A kind of mechanical bending forming method of solar arc reflector

technical field

The invention relates to a manufacturing method of an arc mirror, in particular to a mechanical bending forming method for a line-concentrating solar arc mirror.

Background technique

In the field of solar thermal power generation, especially in the line concentrating thermal power generation method, curved mirrors are widely used as a solar concentrating system. Generally, such mirrors are manufactured by deforming flat mirrors or flat glass. The specific processing technology can be roughly divided into two categories: (1) High-temperature thermal deformation: first heat the glass to a softened state, then heat-bend and deform it in the mold, and then optionally temper it to increase the strength, and then shape the curved glass Mirrored and painted. This process is expensive, and the surface of the glass is prone to wavy lines due to uneven heating, which has a great impact on reflection and concentration. In addition, the consistency of the product is poor; (2) Mechanical cold deformation: the flat mirror is deformed by the external force It is physically deformed under action, acquires the desired shape and is mechanically fixed. This kind of process has low cost, relatively simple operation, and the mirror surface is relatively smooth, without defects such as lines, and has a good light-gathering effect.

Mechanical cold deformation is effective in the manufacture and molding of curved mirrors. The ideal mirror support surface is a continuous curved structure, which will inevitably lead to a heavier mirror support structure, higher requirements for the curved surface, and higher manufacturing costs. big. The invention patent "A Manufacturing Method for Curved Mirrors for Solar Heliostats (CN 101661125A)" proposes a method for manufacturing curved solar heliostats by mechanical cold deformation. The overall structure is slightly complicated, and the processing process needs to be carried out under medium temperature and low pressure conditions.

Contents of the invention

In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a mechanical bending and forming method for a solar curved reflector, which is simple and practical, and can be manufactured and formed under normal temperature and pressure conditions.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for mechanical bending and forming of a solar arc reflector. The flat mirror is placed on the support surface of the mirror holder, and the support surface is evenly coated with a 2-5mm thick adhesive medium in the form of a cream at normal temperature. The support surface of the mirror holder is discontinuous. The pseudo-arc surface, the shape of the pseudo-arc surface is consistent with the shape of the arc reflector to be manufactured. The plane mirror and the supporting surface are tightly attached together by an external mechanical force applying device.

The support surface of the mirror support is a quasi-arc surface structure composed of a plurality of discrete strip support surfaces, and the strip support surface is just arranged on the arc shape curve of the mirror to be manufactured, and Symmetrically arranged, and the number of discrete strip support surfaces is at least three.

The bonding medium is a cream-like glue that can bond glass and metal at room temperature, and silicone structural sealant or organosilicon sealant can be used.

The external mechanical force applying device is a device capable of providing vertical external force, including heavy objects or hydraulic devices.

The support surface of the mirror holder is composed of multiple discrete strip structures, which is not only light in weight, but also avoids the high-precision processing requirements of the continuous arc surface structure, and the cost is low.

The method of the invention is used to manufacture the curved reflector, which is simple, easy to implement, low in cost, and accurate enough to meet the requirements of light concentration, and can be popularized and used on a large scale, and applied to related fields such as solar concentrated light thermal power generation.

Description of drawings

Accompanying drawing is the schematic diagram when using the present invention to manufacture curved mirror.

specific implementation plan

The present invention is described in detail below in conjunction with accompanying drawing.

With reference to accompanying drawing, a kind of mechanical bending forming method of solar curved surface reflector, a long 3m, wide 1m, thick 3.2mm flat mirror 1 is placed on the support surface of overall length 3m, wide 1m mirror support 3, and support surface is made of 5 It is composed of discrete support strips, arranged symmetrically from left to right. The length of the support strips is 3m. The upper surface of the support strips is evenly coated with a 2-5mm thick adhesive medium 2 in the form of cream at room temperature. The curved mirrors to be manufactured have the same shape, and the flat mirror is placed on it, and the external mechanical force application device 4 is used to bend the flat mirror, so that the supporting surfaces of the flat mirror 1, the bonding medium 2 and the mirror support 3 are closely attached to each other, 15 minutes Finally, the bonding medium starts to solidify. After 1 hour, the bonding medium is initially cured, and the initial curved mirror is ready. After 24 hours, it is completely cured and becomes the finished product.

In the accompanying drawings, 1. Plane mirror; 2. Adhesive medium; 3. Mirror support; 4. External mechanical force applying device

Claims (6)

1. A kind of solar curved reflector mechanical bending forming method, it is characterized in that, plane mirror is placed on the support surface of mirror holder, evenly smears on the support surface with 2～5mm thick normal temperature and is cream-like adhesive medium, The supporting surface of the mirror holder is a discontinuous quasi-arc surface, and the shape of the arc surface is consistent with the shape of the arc reflector to be manufactured. 2. A method for mechanical bending and forming of a solar curved reflector according to claim 1, characterized in that the plane mirror and the support surface are closely attached together by an external mechanical force applying device. 3. A method of mechanical bending and forming of a solar arc reflector according to claim 1, wherein the supporting surface of the mirror holder is a pseudo-arc structure formed by combining a plurality of discrete strip-shaped supporting surfaces , the strip-shaped support surfaces are just arranged on the arc shape curve of the reflector to be manufactured, and arranged symmetrically from left to right, and the number of discrete strip-shaped support surfaces is at least three. 4 . A method for mechanical bending and forming of a solar arc reflector according to claim 1 , wherein the bonding medium is a paste-like glue that can bond glass and metal at room temperature. 5 . 5. A mechanical bending and forming method for a solar arc reflector according to claim 1 or 4, characterized in that the glue that can bond glass and metal is a silicone structural sealant or a silicone sealant. 6 . A method for mechanical bending and forming of a solar curved reflector according to claim 2 , wherein the external mechanical force applying device is a device capable of providing a vertical external force, including a weight or a hydraulic device.

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