DE102011001947A1 - Preparing a curved reflector provided with a support structure for a solar thermal plant, comprises connecting a curved, a convex rear side exhibiting reflector with one support structure by sticking - Google Patents

Abstract

Preparing a curved reflector (2) provided with at least one support structure (3) for a solar thermal plant, comprises connecting a curved, a convex rear side exhibiting reflector with at least one support structure by sticking. The supporting profiles are used as support structures, which respectively exhibit an attachment surface stripped to the contour course of reflector rear side. The attachment structure extends parallel to the longitudinal center axis of the respective supporting profiles support structure. Preparing a curved reflector (2) provided with at least one support structure (3) for a solar thermal plant, comprises connecting a curved, a convex rear side exhibiting reflector with at least one support structure by sticking. The supporting profiles are used as support structures, which respectively exhibit an attachment surface stripped to the contour course of reflector rear side. The attachment structure extends parallel to the longitudinal center axis of the respective supporting profiles support structure. The linear adhesive beads associated with the attachment surfaces area arranged on the reflector rear side and/or the supporting profiles support structure of linear adhesive beads are arranged on the attachment surfaces. The reflector on the one hand and the supporting profiles support structure or the respective supporting profile support structure on the other hand are bound together after the adhesive bead application and is fixed relative to each other until at least one partial cure of the adhesive takes place. An independent claim is also included for the curved reflector for the solar thermal plant adhered with the support structure on it, is prepared by the above mentioned method.

Description

The invention relates to a method for producing a curved reflector provided with at least one support for a solar thermal system in which a curved, a convex rear-facing reflector is connected by gluing with at least one support beam, and a curved reflector produced by such a method.

With regard to the expansion of solar thermal power plants not only issues to increase the energy yield in the foreground, but also increasingly a reduction in the investment costs necessary for such plants. In a solar thermal power plant with a large number of mirrors (reflectors), the achievable power output depends on the usable mirror surface. Solar thermal power plants are equipped with flat mirrors, but also with parabolic mirrors, in particular parabolic trough collectors. The parabolic trough collectors used usually have a considerable total length, which can sometimes be more than 100 m. For reasons of production and transport, parabolic trough collectors are produced in segments, with the length of the individual segments being, for example, in the order of magnitude of 8 m to 12 m. Due to the relatively large areas of the domed mirrors used, there is a need to support them, since the curved parabolic mirror contour must be maintained very precisely in order to ensure a high energy yield.

This applies in particular to thin-film mirrors, such as anodized aluminum sheets or polymer foils, but also for self-supporting parabolic trough mirrors made of silver-plated laminated glass on the backside. Furthermore, serving as collectors mirrors a solar thermal system must be mechanically tracked to the sun. For this reason, domed mirrors for solar thermal systems are provided with a movably storable substructure.

From the DE 199 31 372 C1 is a trough-shaped solar collector for focusing solar radiation on an elongated absorber known. The solar collector has a longitudinal member on which a plurality of cross members are mounted. Between two consecutive cross members, a channel-shaped reflector is arranged, which is formed for example from a metal sheet. The cross members consist of a relatively thin sheet metal and have a central opening, with which they are attached to the longitudinal member. In the cross members recesses for receiving in each case on both sides of the cross member projecting, the reflectors bearing tabs are provided. The arranged between two consecutive cross members reflector and the tabs can be positively connected to each other, for example, with a screw, rivet or adhesive connection.

Channel-shaped solar collectors offer the wind a large attack surface due to their large reflector surface. To meet high wind load requirements, the cross member of the from DE 199 31 372 C1 known solar collector with relatively many recesses and tabs to connect the reflectors are provided. The connection of the reflectors on the tabs is labor-intensive and causes in the connected by screws, rivets or relatively few splices connection points local voltage and, accordingly, load concentrations. A adapted to different levels of wind load connection of cross members and reflectors can be with the from the DE 199 31 372 C1 known solar collector hardly or only difficult to realize.

The present invention has for its object to provide a method for producing a provided with at least one support beam curved reflector for a solar thermal system, which allows a simple way a requirement-optimized adhesive bond of reflector and support beams and also very low production costs. In addition, a cost-effective curved reflector for a solar thermal system to be provided.

This object is achieved by a method having the features of claim 1 or by a reflector having the features of claim 16.

The method according to the invention, in which a convex reflector having a convex rear side is adhesively bonded to at least one support beam, is essentially characterized in that support profiles are used as support beams, each having a strip-like connection surface following the contour profile of the reflector back extends in particular parallel to the longitudinal center axis of the respective support profile, being applied to the reflector back the line surfaces associated adhesive beads and / or on the connection surfaces of the support profiles line-shaped adhesive beads, and wherein the reflector on the one hand and the support profiles or the respective support profile on the other hand after adhesive bead application joined together and relatively are fixed to each other until at least a partial curing of the adhesive has occurred.

The inventive method allows by the use of support profiles, the have a the contour profile of the reflector backside largely following strip-shaped connection surface, a direct adhesive connection of reflector and support profile. An assembly of additional intermediate elements, such as the tabs according to the DE 199 31 372 C1 , is not required in the method according to the invention. The support profiles can be produced in a relatively simple manner with high dimensional accuracy. This is especially true if the support profiles are preferably formed from sheet metal by deep drawing. If a compensation of manufacturing tolerances of the support profiles is necessary, this can be realized in a simple and reliable way by Dickschichtklebung when performing the method according to the invention. The contour profile of the reflector backside largely following strip-shaped attachment surface of the support profile allows in particular a requirement-optimized adhesive bond of reflector and support profile. Thus, at high load requirements at least one continuous line-shaped adhesive bead for cohesive connection of reflector and support profile on the reflector back and / or on the at least one connection surface of the support profile are applied, while at medium or low load requirements at least one broken line-shaped adhesive bead can be applied. Thus, a requirement-optimized adhesive connection of reflector and support profiles can be realized in a simple manner. The requirement-optimized adhesive bond comprises a demand-optimized adhesive application, by which an excessive adhesive consumption and thus unnecessary material costs can be avoided. In the overall result, the method according to the invention thus makes it possible to produce a curved reflector provided with at least one support carrier for a solar thermal system at particularly low production costs.

An advantageous embodiment of the method according to the invention is that extruded profiles and / or roll forming profiles are used as support profiles or support member profiles. Extrusion and roll forming (roll forming) allow the production of large quantities of similar support profiles with a constant cross-section at relatively low production costs. The support profiles thus produced and used in the method according to the invention may, for example, have a T-shaped, double-T-shaped, Z-shaped, L-shaped, C-shaped or U-shaped cross-sectional shape.

In addition, however, other production methods, in particular deep drawing are available to provide inventive support profiles or support member profiles, each having a contour contour of the reflector back largely following strip-like connection surface, which preferably extends parallel to the longitudinal center axis of the respective support profile or support member profile. Deep drawing of U-shaped support profiles or U-shaped support part profiles can be carried out with high precision simply, with few process steps and short cycle times. An advantageous embodiment of the method according to the invention is accordingly characterized in that used as support profiles or support member profiles produced by deep drawing sheet metal parts. Due to the higher geometric degrees of freedom during deep drawing specific and load-appropriate shape or cross-sectional changes of the support profiles or support member profiles, for example, for forming the connection surfaces, are easily taken into account. In particular, during deep drawing, the cross section of the support profile or support member profile can be varied in the longitudinal direction. About changes in cross section of the support profile or support member profile in particular different stiffness requirements in the longitudinal direction of the support profile can be taken into account.

A further advantageous embodiment of the method according to the invention is characterized in that the connection surfaces for the reflector are provided by flanges formed on the support profiles. A flange can be easily produced in the production of the respective support profile or support member profile during prototyping or forming of starting material, so that no further intermediate elements, such as tabs according to the DE 199 31 372 C1 , are necessary. In addition, a flange advantageously causes an increase in the rigidity of the respective support profile or support member profile, which is preferably designed as a lightweight component.

According to a further advantageous embodiment of the method according to the invention it is provided that the respective support profile is composed of a plurality of adjoining in the longitudinal direction of the support profile support member profiles. By dividing the support profile into at least two support member profiles, the production costs can be further reduced through the use of simple and smaller tools. This is especially true if, for example, two substantially identically shaped support member profiles arranged in mirror image form together a complete support profile. The use of multiple support member profiles also allows a stress-optimized design by using different sheet thicknesses and / or material grades per sub-profile. In addition, the support member profiles can be transported easier due to their smaller size and easier to handle when sticking to the convex curved back of the solar reflector (collector).

For reliable connection of reflector and support profile, it will usually be sufficient if According to a further preferred embodiment of the method according to the invention, the adhesive beads are applied with a thickness in the range of 1 mm to 10 mm on the reflector back and / or the attachment surfaces of the support profiles.

With regard to a compensation of manufacturing tolerances of the support profiles provides a further preferred embodiment of the method according to the invention that the adhesive beads are applied with a thickness of at least 3 mm, preferably at least 6 mm on the reflector back and / or the attachment surfaces of the support profiles.

A particularly reliable cohesive connection of reflector and support profile is achieved when the adhesive beads are applied in the form of continuous adhesive beads on the reflector back and / or the connection surfaces of the support profiles. This embodiment of the method according to the invention is advantageous if the reflector in the application area can be exposed to high wind loads.

If, on the other hand, the reflector is to be set up in a location where only medium wind loads prevail, it will generally not be necessary to apply continuous adhesive beads. To save on adhesive costs, another preferred embodiment of the method according to the invention for such applications that the adhesive beads are applied in the form of interrupted adhesive beads, such that the distance between the successive adhesive bead sections is equal to or smaller than the length of the respective adhesive bead section.

If, on the other hand, only low wind loads are to be expected, then the amount of adhesive to be applied can be reduced even further. For such applications, a further preferred embodiment of the inventive method provides that the adhesive beads are applied in the form of interrupted adhesive beads, such that the distance between the successive adhesive bead sections is greater than the length of the respective adhesive bead section.

A further advantageous embodiment of the method according to the invention provides that the adhesive beads are applied in the form of interrupted adhesive beads, such that the successive adhesive bead sections of at least two mutually parallel discontinuous adhesive beads are offset relative to each other with respect to the transverse direction of the adhered support profile. This embodiment of the method according to the invention is advantageous, in particular in connection with the use of U-shaped support profiles, which have mutually parallel flanges as strip-shaped attachment surfaces, if the expected wind loads acting on the reflector are not large but only medium or rather small , This embodiment of the method according to the invention makes it possible, on the one hand, to save adhesive when using cross-sectionally U-shaped support profiles with mutually parallel flanges as attachment surfaces, but, on the other hand, to achieve a higher connection stability compared with the application of a single continuous bead of adhesive due to the double overlay.

For a reliable compensation of dimensional tolerances of the support profiles with high connection stability and at the same time the lowest possible consumption of adhesive provides a further preferred embodiment of the method according to the invention that the respective bead of adhesive is applied such that it has a cross-sectional shape prior to joining and fixing reflector and support profile , which tapers from the respective base surface to the free upper side of the adhesive bead, preferably has a substantially triangular cross-sectional shape.

In order to achieve a fast, reliable and reproducible application of the adhesive beads, according to a further preferred embodiment of the method according to the invention, a program-controlled application device for the automatic application of the adhesive beads is used. This embodiment allows in a simple manner in particular a variation of the adhesive application from the order of a continuous bead of adhesive to order a broken adhesive bead and vice versa by simple reprogramming or a program change.

The inventive method is particularly distinguished from that of DE 199 31 372 C1 known prior art by the fact that in him no costly structural adjustments are necessary if, for example, another adhesive application is needed or different glued variants are required for the same or similar components. In the method according to the invention an adjustment or variation of the adhesive application with automated bonding is simply possible by a program change. Different variants of the adhesive application may be necessary, for example, if there are areas within a solar field with different demands on the support structure and thus on the bond, which can occur, for example, due to different wind conditions within the solar field.

A further preferred embodiment of the method according to the invention is characterized in that a program-controlled handling device is used for automatic joining and fixing of reflector and support profile. This refinement also makes possible a rapid, reliable and reproducible production of a curved reflector provided with at least one support carrier for a solar thermal system.

In order to keep the production time in carrying out the method according to the invention low, provides a further advantageous embodiment of the method that the adhesive is applied after joining and fixing of reflector and support profile or support profiles with heat and / or light radiation, for example UV radiation ,

Further preferred and advantageous embodiments of the method according to the invention are specified in the subclaims.

The invention will be explained in more detail by means of embodiments in conjunction with a drawing. The drawing shows in

1a) a solar collector with trough-shaped reflector and attached to the convex rear support support, in a schematic sectional view perpendicular to the longitudinal axis of the solar collector;

1b) to 1f) the support of the 1a) in different cross-sectional designs;

2a) a further solar collector with trough-shaped reflector and attached to the convex rear support support, in a schematic sectional view perpendicular to the longitudinal axis of the solar collector;

2 B) to 2d) Cross-sectional views of the support of the 2a) along the section lines AA, BB and CC in 2a) ;

2e) to 2g) Top views of the support of the solar collector 2a) without reflector, in direction D in 2a ;

2h) to 2y) a variant of a support carrier of the solar collector of 2a) or 1e) or 1f) without reflector, in plan view and in cross section along the section lines EE and FF in 2h ;

2k) to 2m) another variant of a support bracket of the solar collector of 2a) or 1e) or 1f) without reflector, in plan view and in cross section along the cutting lines GG and HH in 2k ;

3 a production plant for producing a reflector according to the invention provided with support beams for the focusing of solar radiation, in a schematic perspective view;

4a) to 4c) various manufacturing steps in the manufacture of a support provided with curved supports according to the invention, in a schematic perspective view;

5a) and 5b) two embodiments of the cross-sectional shape of a bead of adhesive; and

6a) to 6c) various embodiments of an adhesive application to the back of a curved reflector, in a schematic perspective view.

1a) shows first an embodiment of a solar collector 1 with a curved reflector (mirror) 2 , at its convex back transverse to the longitudinal axis of the collector 1 extending support beams 3 are glued. The reflector 2 is designed here as a parabolic trough mirror. In the center of the parabolic trough mirror 2 is an absorber tube 4 arranged on which the on the arched mirror 2 incident sunbeams are focused, wherein in the absorber tube 4 a fluid to be heated flows. The support beams 3 are on one in the longitudinal direction of the collector 1 extending side members 5 arranged and connected to this example by screws or other connecting means.

The support beams 3 consist of support profiles and each have a the contour profile of the reflector back following strip-shaped connection surface 6 on, which are parallel to the longitudinal central axis of the respective support profile 3 extends. The connection area 6 is as needed at least in sections with adhesive 7 for cohesive connection of the reflector 2 with the support profile 3 Mistake. For this purpose, the connection surfaces 6 associated linear adhesive beads on the reflector back and / or on the attachment surfaces 6 the support profiles 3 applied. Subsequently, the reflector 2 and the support profiles 3 or the respective support profile 3 joined together and fixed relative to each other until at least a partial curing of the adhesive 7 is done.

The support profiles 3 can have any geometry, but it is preferably to the determined peak load of the solar collector 1 customized geometries. For this purpose, those in the geographical area of application of the solar collector 1 occurring peak Wind loads as well as the loads that accompany the tracking of the reflector 2 depending on the position of the sun by swiveling the solar collector 1 occur, determined and in the design of the geometry of the support profiles 3 considered.

The support profiles 3 are formed, for example, of metallic material, preferably of steel material. They can be produced in particular by extrusion or roll forming. In the 1b) and 1c) are examples of the cross-sectional shape of a support profile used in the method according to the invention 3 an extruded part in the form of a double-T-profile ( 1b) ) or a T-profile ( 1c) ). Furthermore, as support profiles 3 in the method according to the invention also extruded parts or roll-formed parts in the form of a Z-profile ( 1d) ) and / or in the form of a U-profile with outwardly projecting flanges 6.1 . 6.2 ( 1e) respectively. 1f) ) be used.

Further, as support profiles 3 in the inventive method, as in the 2a) to 2d) also shown deep-drawn parts in the form of U-profiles with outwardly projecting flanges 6.1 . 6.2 be used. In the in the 2a) to 2d) embodiment shown has the support profile 3 a varying along the longitudinal axis of the support profile cross-sectional shape. In the area of the longitudinal member 5 is the tread depth of the support profile 3 relatively small while moving towards the free end of the support profile 3 or the outer edge of the reflector 2 initially steadily increases, reaches a maximum and then towards the free end of the support profile 3 steadily decreasing. Furthermore, in 2a) to recognize that the support profile consists of two in the longitudinal direction of the support profile 3 juxtaposed support member profiles 3.1 . 3.2 is formed. The support profiles 3.1 . 3.2 For example, they can be connected to one another via screwing elements using bores which are formed in the mutually facing ends of the support part profiles. However, other types of connection of the support member profiles 3.1 . 3.2 conceivable, for example, soldering, welding, gluing or other material, positive and / or non-positive connections.

In 3 is a production plant for the production of a support according to the invention 3 provided reflector 2 schematically shown for focusing of solar rays. The plant has a device 8th for receiving one or more arched reflectors 2 on. The cradle 8th is, for example, an elongated body 8.1 formed, which has a cylinder-shaped lateral surface. The body 8.1 for example, has a length in the range of 8 m to 25 m. The curvature of the curved cross-sectional contour of the body 8.1 Corresponds essentially to the curved inner contour of with support beams (support profiles) 3 to be provided reflectors 2 , The reflectors (mirrors) 2 For example, they may consist of curved laminated glass whose back is silver-plated, or of thin anodized aluminum sheet or chromed sheet metal, in particular stainless steel sheet.

One or more such reflectors (mirrors) 2 be with their concave curved front on the receiving body 8.1 hung up. A section of the solar collector to be manufactured 1 can, for example, four reflector segments (mirrors) 2.1 . 2.2 . 2.3 . 2.4 include (cf. 4a) to 4c) ). The transport and positioning of the reflectors 2 respectively. 2.1 . 2.2 . 2.3 . 2.4 are preferably carried out automatically by means of a suitable handling device, for example by means of a robot equipped with a suction gripper (not shown).

On the curved back of the reflectors 2 respectively. 2.1 . 2.2 . 2.3 . 2.4 will then glue at predetermined locations 7 applied. The adhesive 7 is preferably by means of a robot or other suitable means, for example, a parallel to the elongate receiving body 8.1 movable portal system 9 applied automatically. At the bridge-like carrier 9.1 the portal system 9 is a raised and lowered robot arm 9.2 arranged along the carrier 9.1 or transversely to the elongate receiving body 8.1 is movable. The hand of the robotic arm 9.2 holds a job nozzle 9.3 , for example, via a pipe or hose 9.4 on an adhesive reservoir 9.5 connected.

The adhesive 7 is made as required in the form of linear adhesive beads on the back of the reflectors 2 respectively. 2.1 . 2.2 . 2.3 . 2.4 applied. The adhesive beads are thereby depending on the load requirements, which the solar collector 1 exposed in later use as a continuous ( 7 ' ) or broken beads of adhesive 7 '' or 7 ''' applied.

After the glue application the robot arm becomes 9.2 moved to a parking position P1, which is close to one of the vertical supports 9.7 the portal system 9 located. By means of at least one suitable handling device, for example a gripper 9.6 , the or at a robot or the portal system 9 is hung on the contour of the reflectors 2 respectively. 2.1 . 2.2 . 2.3 . 2.4 adapted support profiles (cross member) 3 from storage containers 10.1 . 10.2 , For example, taken grid boxes, placed in position, placed on the adhesive beads on the back of the reflector and, if necessary, depending on the composition of the adhesive 7 fixed with a predetermined contact pressure until at least partial hardening has taken place (cf. 4a) to 4c) ).

In support of this, suitable heat and / or radiation sources (not shown) may be used which facilitate partial cure or cure of the adhesive 7 accelerate.

The on the bridge-like carrier 9.1 the portal system 9 movable grippers 9.6 is then moved back to its parking position P2, which is located at the parking position P1 of the adhesive applicator opposite end of the carrier 9.1 or near the other vertical support 9.7 the portal system 9 located. The boundaries of the two parking positions P1 and P2 are in 3 marked by vertical dashed lines.

After sufficient curing of the adhesive 7 will be the one with support profiles 3 provided reflector (parabolic trough mirror) 2 by means of a crane 11 , For example, a hall crane or mobile crane, or other suitable movable lifting device of the receiving body 8.1 lifted and transported to a next processing station or an intermediate storage.

Be the support profiles 3 , as in 2a shown, from two or more support member profiles 3.1 . 3.2 composed, so includes a production plant according to 3 preferably a storage container 10.1 with support member profiles 3.1 for the right side and a storage container 10.2 with support member profiles 3.2 for the left side of the solar collector to be produced 1 , It is understood that the production plant not only as in 3 presented with a portal system 9 may be equipped, but that alternatively or additionally, conventional robots for producing a reflector provided with support according to the invention can be used.

The connection area 6 is the part of the attached support profiles 3 respectively. 3.1 . 3.2 preferably by at least one, preferably two flanges formed on the respective support profile 6.1 . 6.2 provided. The required component accuracy to achieve the highest possible optical quality of the solar collector 1 in particular by a high manufacturing accuracy of the support profiles 3 or support member profiles 3.1 . 3.2 reached. For this purpose, the support profiles 3 preferably made of sheet metal as deep-drawn parts. Furthermore, the inventive method includes the possibility of certain dimensional or shape tolerances of the support profiles 3 or the reflectors to be connected with it 2 respectively. 2.1 . 2.2 . 2.3 . 2.4 to be compensated by a Dickschichtklebung. For this purpose, the line-shaped adhesive beads 7 ' For example, with a layer thickness in the range of 3 mm to 6 mm on the reflector back and / or the connection surfaces 6 or flanges 6.1 . 6.2 the support profiles 3 or support member profiles 3.1 . 3.2 applied.

The order of the adhesive 7 used application nozzle 9.3 is preferably formed so that the adhesive bead applied thereto 7 ' . 7 '' or 7 ''' has a cross-sectional shape extending from the respective base surface to the free top of the adhesive bead 7 ' tapered towards, preferably has a substantially triangular cross-sectional shape (see. 5a) and 5b) ). The adhesive beads 7 ' . 7 '' . 7 ''' However, also with other cross-sectional shapes on the reflector back and / or the connection surfaces 6 or flanges 6.1 . 6.2 the support profiles 3 or support member profiles 3.1 . 3.2 be applied.

To reduce the material costs of producing one with support beams 3 provided arched reflector 2 to minimize, the present invention provides a demand-optimized adhesive application. At high load requirements, especially high wind loads detected, the adhesive is 7 in the form of continuous line-shaped adhesive beads 7 ' applied (see. 6c ).

At medium load requirements, the adhesive becomes 7 in contrast, in the form of interrupted line-shaped adhesive beads 7 '' applied, such that the distance between the successive adhesive bead sections 7.1 is equal to or less than the length of the respective adhesive bead section 7.1 (see. 6b ).

Are the solar collectors produced according to the invention 1 only exposed to low wind loads or load requirements, so is the adhesive 7 preferably in the form of interrupted line-shaped adhesive beads 7 ''' applied, such that the distance between the successive adhesive bead sections 7.1 is greater than the length of the respective adhesive bead section 7.1 (see. 6a ).

In the 2f) and 2g) Two further advantageous variants of the adhesive application are outlined, the U-shaped support profiles 3 respectively. 3.1 . 3.2 with mutually parallel flanges 6.1 . 6.2 can be applied, allow a significant adhesive savings and yet give a cohesive connection with high stability.

The in the 2f) and 2g) sketched variants of the adhesive application are each characterized by the adhesive beads in the form of two broken adhesive beads 7 '' respectively. 7 ''' are applied, wherein the successive adhesive bead sections 7.1 the two mutually parallel interrupted adhesive beads 7 '' respectively. 7 ''' with respect to the transverse direction of the supporting profile to be adhered 3 offset from one another.

The total adhesive length of in 2f) sketched variant corresponds essentially to the total adhesive length of a single continuous adhesive bead 7 ' when gluing, for example, a T or Z profile 3 according to 1c) respectively. 1d) , Due to the double support or double connection on the two flanges 6.1 . 6.2 of the U-profile 3 However, this results in relation to a single continuous adhesive bead 7 ' a higher stability of the cohesive connection.

The in the 2h) to 2m) outlined variants are other examples of cross-sectional shapes suitable support profiles. The 2h) to 2y) show an example of a substantially U-shaped support profile 3 with outwardly projecting and continuous flanges 6.1 . 6.2 , Wherein the cross-sectional shape in the longitudinal direction of the support profile 3 changes periodically. The 2k) to 2m) show another example of a substantially U-shaped support profile 3 , which only partially with outwardly projecting flanges (flange sections) 6.1 . 6.2 is provided.

The inventive method for producing a with at least one support carrier 3 . 3.1 . 3.2 provided reflector 2 is not just about the connection between support beams 3 and reflector 2 limited, but may also include other components, with the at least one support beam (support profile) 3 . 3.1 . 3.2 connected, which can lead to the complete substructure. For example, several support beams (support profiles) 3.1 . 3.2 be provided, which are connected to each other via other components, in particular side members and / or transverse struts with the reflector 2 , which can also be constructed of several segments, fixed and connected, so that a reflector with substructure for solar technology facilities can be provided.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19931372 C1 [0004, 0005, 0005, 0009, 0012, 0022]

Claims (17)

Method for producing a curved reflector provided with at least one support beam ( 2 . 2.1 . 2.2 . 2.3 . 2.4 ) for a solar thermal system, in which a curved, a convex rear-facing reflector is connected by gluing with at least one support carrier, characterized in that as a support carrier support profiles ( 3 . 3.1 . 3.2 ) are used, each having a contour contour of the reflector back following strip-like attachment surface ( 6 . 6.1 . 6.2 ), which in particular parallel to the longitudinal central axis of the respective support profile ( 3 . 3.1 . 3.2 ), wherein on the reflector backside the attachment surfaces ( 6 . 6.1 . 6.2 ) assigned line-shaped adhesive beads ( 7 ' . 7 '' . 7 ''' ) and / or on the connection surfaces ( 6 . 6.1 . 6.2 ) of the supporting profiles ( 3 . 3.1 . 3.2 ) linear adhesive beads ( 7 ' . 7 '' . 7 ''' ), and wherein the reflector ( 2 . 2.1 . 2.2 . 2.3 . 2.4 ) on the one hand and the support profiles ( 3 . 3.1 . 3.2 ) or the respective support profile ( 3 . 3.1 . 3.2 On the other hand, after adhesive bead application, they are joined together and fixed relative to each other until at least partial curing of the adhesive ( 7 ) is done. Method according to claim 1, characterized in that as support profiles ( 3 . 3.1 . 3.2 ) Extruded profiles and / or Rollformprofile be used. Method according to claim 1 or 2, characterized in that as support profiles ( 3 . 3.1 . 3.2 ) produced by deep drawing sheet metal parts are used. Method according to one of claims 1 to 3, characterized in that the connection surfaces by on the support profiles ( 3 . 3.1 . 3.2 ) formed flanges ( 6.1 . 6.2 ) to be provided. Method according to one of claims 1 to 4, characterized in that the respective support profile ( 3 ) of a plurality in the longitudinal direction of the support profile ( 3 ) adjoining support member profiles ( 3.1 . 3.2 ) is composed. Method according to one of claims 1 to 5, characterized in that the adhesive beads ( 7 ' . 7 '' . 7 ''' ) with a thickness in the range of 1 mm to 10 mm on the back of the reflector and / or the bonding surfaces ( 6 . 6.1 . 6.2 ) of the supporting profiles ( 3 . 3.1 . 3.2 ) are applied. Method according to one of claims 1 to 6, characterized in that the adhesive beads ( 7 ' . 7 '' . 7 ''' ) having a thickness of at least 3 mm, preferably at least 6 mm on the reflector back side and / or the attachment surfaces ( 6 . 6.1 . 6.2 ) of the supporting profiles ( 3 . 3.1 . 3.2 ) are applied. Method according to one of claims 1 to 7, characterized in that the adhesive beads in the form of continuous adhesive beads ( 7 ' ) are applied. Method according to one of claims 1 to 7, characterized in that the adhesive beads in the form of interrupted adhesive beads ( 7 '' ) are applied, such that the distance between the successive adhesive bead sections ( 7.1 ) is equal to or smaller than the length of the respective adhesive bead section ( 7.1 ). Method according to one of claims 1 to 7, characterized in that the adhesive beads in the form of interrupted adhesive beads ( 7 ''' ) are applied, such that the distance between the successive adhesive bead sections ( 7.1 ) is greater than the length of the respective adhesive bead section ( 7.1 ). Method according to one of claims 1 to 7, 9 or 10, characterized in that the adhesive beads in the form of interrupted adhesive beads ( 7 '' . 7 ''' ) are applied, such that the successive adhesive bead sections ( 7.1 ) of at least two mutually parallel interrupted adhesive beads ( 7 '' . 7 ''' ) with respect to the transverse direction of the support profile to be adhered ( 3 . 3.1 . 3.2 ) are offset from one another. Method according to one of claims 1 to 11, characterized in that the respective adhesive bead ( 7 ' . 7 '' . 7 ''' ) is applied in such a way that, prior to the joining and fixing of reflector ( 2 . 2.1 . 2.2 . 2.3 . 2.4 ) and support profile ( 3 . 3.1 . 3.2 ) has a cross-sectional shape extending from the respective base surface to the free upper side of the adhesive bead ( 7 ' . 7 '' . 7 ''' ), preferably has a substantially triangular cross-sectional shape. Method according to one of claims 1 to 12, characterized in that a program-controlled application device ( 9 . 9.2 . 9.3 ) for the automatic application of the adhesive beads ( 7 ' . 7 '' . 7 ''' ) is used. Method according to one of claims 1 to 13, characterized in that a program-controlled handling device ( 9.6 ) for automatic joining and fixing of reflector ( 2 ., 2.1 . 2.2 . 2.3 . 2.4 ) and support profile ( 3 . 3.1 . 3.2 ) is used. Method according to one of claims 1 to 14, characterized in that the adhesive ( 7 ) after joining and fixing reflector ( 2 ., 2.1 . 2.2 . 2.3 . 2.4 ) and support profile or support profiles ( 3 . 3.1 . 3.2 ) is subjected to heat and / or light radiation. Arched reflector ( 2 . 2.1 . 2.2 . 2.3 . 2.4 ) for a solar thermal plant, with support beams adhered thereto ( 3 . 3.1 . 3.2 ) produced by a method according to any one of claims 1 to 15. Arched reflector according to claim 16, characterized in that further components with the support beams ( 3 . 3.1 . 3.2 ) and / or the support beams ( 3 . 3.1 . 3.2 ) with each other via a longitudinal member ( 5 ) are connected.

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