EP2047519A2 - Support arrangement for a solar plant and solar plant comprising said support arrangement - Google Patents

Abstract

The invention relates to a novel support arrangement for the solar modules of a solar plant, characterized by module supports that are arranged at an angle and that are fastened on two longitudinal beam profiles interspaced in the longitudinal direction of the module supports, the longitudinal beam profiles being connected to each other and to ground supports via connecting elements.

Description

 Support arrangement for solar system and solar system with such a support arrangement.

The invention relates to a support arrangement for a solar system and a solar system with such a support arrangement.

In solar arrangements with one or more solar modules, the orientation of the module surfaces is essential for the achievable area performance of the typically planar modules. The surface normal of the module surfaces generally has at least approximately to the south and is inclined to the horizontal by an angle preferably dependent on the geographical latitude of the installation site.

While in a mounting of the solar modules on a sloping roof surface, the module surfaces are typically arranged parallel to the roof surface, support structures of different design are used for other sites. From DE 200 08 509 U1 an advantageous embodiment of a support structure for the installation of a solar array on a flat surface, in particular a flat roof is known in which commercially available concrete blocks are used inexpensively as part of a stable substructure.

From DE 203 03 257 U1 a holding device for solar modules is known in which a crash barrier profile is attached as a longitudinal beam by means of angles to a number of posts. The solar modules have frames which are bolted to the side rail. In DE 203 19 065 U1, the solar modules are not mounted directly on the longitudinal member, but on module carrier profiles, which in turn are mounted in an inclined relative to the horizontal orientation on the longitudinal member.

In DE 89 00 621 U1 a holder for solar modules is described in which are clamped on a round tube as a longitudinal beam by clamping angle profiles in variable inclination to the horizontal and frame of solar modules are held on these angle profiles by means of screw terminals. In other embodiments described in this document, two round tubes are fastened to a side rail spaced apart transversely to the pipe longitudinal axis on an H-shaped frame, and solar modules are fastened to each side rail.

The invention has for its object to provide an advantageous support arrangement for a solar system with multiple solar modules and a solar system with such a support assembly.

Solutions according to the invention are described in the independent claims. The dependent claims contain advantageous refinements and developments of the invention.

The use of two transversely spaced to their longitudinal direction of the longitudinal member and the support of the transverse to the longitudinal members extending module carrier results in a support assembly high stability while low material consumption, especially when connecting the floor supports on

Connecting elements that preferably connect together in each case both longitudinal members with the floor support. In the direction of the side members, which is also referred to below as the longitudinal direction, a plurality of floor supports are arranged in a row at a distance from one another and the side rail arrangement extends over a plurality of floor supports. A longitudinal member may be formed in the longitudinal direction by a plurality of sub-carriers, which are connected to one another overlapping or via intermediate pieces at joints. Preferably, a plurality of module carriers are fastened on the longitudinal carriers between two longitudinally successive floor supports.

Of particular advantage is the design of the connecting elements with a flat first portion, the surface normal shows substantially in the longitudinal direction of the side members. Advantageously, a second planar portion of the connecting element is aligned at an angle to the first. Preferably, the first and second sections are integrally formed in one piece as folded sheet metal. The second section is advantageously used for fastening the module carrier on the connecting element and preferably extends over the entire length of the upwardly facing edge of the first section.

The mutual distance of the two side members is advantageously at least 40%, in particular at least 60% of the distance between the attachment points of a module carrier with the two side members. The distance between the two attachment points mentioned is advantageously at least 15%, in particular at least 20% of the length of the module carrier.

The attachment of the connecting element to the floor support takes place in the first advantageous embodiment of a further plate-shaped portion, which is connected to a at least the first plate portion, preferably first and second plate portion of the connecting element, in particular is welded. In a preferred embodiment, two further plate sections are provided, which bear against opposite sides of the floor support. The further plate sections advantageously have vertical plate surfaces and may favorably have a smaller area and a greater wall thickness than the first plate section.

In another advantageous embodiment, a plate portion parallel to the first plate portion is provided which encloses the upper end of the floor support between itself and the first portion. Preferably, the first and parallel portions of the second portion and two of the other portions mentioned in the preceding paragraph form a downwardly open cavity which surrounds the upper end of the floor support. The connection of the node element is advantageously carried out over the first and the parallel section. The plurality of sections are preferably connected as parts of Abkantblechen and / or via welding.

The floor supports are advantageously in the manner known per se pile-shaped and preferably designed as a profile, in particular with two opposite flat surfaces. In a first advantageous embodiment, the side member profiles are designed as a sheet metal profile with several profile legs as profile surfaces, which z. B. from a flat sheet metal strip by folding, rollers, etc. are particularly inexpensive to produce. In another advantageous embodiment, the longitudinal beam profiles can be made as extruded profiles, in particular made of aluminum, which in particular allows the bridging of large distances between floor supports.

The longitudinal members are preferably designed as profiles. Advantageously, the side rail profiles are fastened with a first profiled surface on the connecting element and have a profile which preferably extends to the first profiled surface. Double the second profile surface on which the module carriers rest. One, the first and second profile surface connecting third profile surface is preferably aligned approximately perpendicular to the first and second profile surface. The second profile surface preferably points upward from the third profile surface in the longitudinal direction of the module carrier. The second profile surface engaging behind brackets and fasteners are preferably arranged on the upper edge of the module carrier in the longitudinal direction of the second profile surface.

The invention is illustrated below with reference to preferred embodiments with reference to the figures still in detail. Showing:

1 is a solar system in side view,

2 is an oblique view,

3 is an enlarged detail of FIG. 1,

4 alternative embodiments of node element and side members,

Fig. 5 is a view of the node element from below.

Fig. 1 shows a side view of a row-shaped solar system or such a series of a multi-row larger system. For the purpose of comparative orientation, an xyz coordinate system with an x-direction perpendicular to the plane of the drawing of FIG. 1, a horizontal direction h running perpendicular to the longitudinal direction x and a vertical direction are preferably shown. The angle between the y-direction and the horizontal h is from the site dependent and amount in the example sketched about 30 °. The row-shaped installation of a plurality of perpendicular to the plane of Fig. 1 spaced successive, preferably pile-shaped floor supports BS for a support assembly is in use and z. B. from the aforementioned prior art. The floor supports may be mounted on foot plates or preferably recessed into the floor EB as in the example outlined. The floor supports can advantageously be designed as tubes or as rolled, drawn or folded profiles. An indicated with QS profile cross-section, which is known per se, is advantageously open to one side and has two opposite flat surfaces. The floor supports usually run in the vertical direction V. The successive floor supports are aligned perpendicular to the plane and aligned with their upper ends substantially at the same horizontal level.

At the upper ends of the floor supports BS connecting elements VE are fixed, preferably screwed with mounting screws SB. On the connecting elements VE two in the direction of the horizontal inclined y-direction spaced, in the longitudinal direction x perpendicular to the plane of Fig. 1 mutually parallel longitudinal beams LT1, LT2 are attached. Facing away from the connecting elements VE on the longitudinal members LT1, LT2, module carriers MT extending in the y direction are fastened. On the module carriers MT are solar modules, which can also be designed frameless and advantageously clamped by connected to the module carriers, preferably screwed terminals KL against the module carrier and against Abrut- see in the y-direction are preferably positively supported.

The module carriers, which are preferably designed as profiles, have a length denoted by DT in the y direction. The attachment points to which the module carriers are fastened on the side members point in the y direction a distance DB, which is advantageously at least 15%, in particular at least 20% of the length DT of the module carrier MT. The distance DL between the two longitudinal beams LT1, LT2 is advantageously at least 40%, in particular at least 60% of DB. The width of the longitudinal members in the y-direction is small compared to their mutual distance. The cost of materials for the side rail assembly is characterized advantageously low at the same time in the y-direction with DB large base of the support of the module carrier.

The fastening of the module carrier MT on the longitudinal carriers can advantageously be carried out in any manner known from DE 20 2005 012 993 U1 via screws ST and staples BK in any direction in the x-direction and / or y-direction.

The side members LT1, LT2 are advantageously of identical construction, so that only one type of profile needs to be manufactured and / or stored. The longitudinal members may be composed in the x-direction of a plurality of adjoining, possibly slightly overlapping sub-carriers.

An advantageous cross-section of a longitudinal member as a sheet metal profile with a plurality of profile legs as profile surfaces has as in the detail of FIG. 3 illustrated a first profile leg PS1 in an xy plane, by means of which the longitudinal member LT1 attached to the connecting element, for example screwed. A second profile leg PS2 running parallel to the first profile limb PS1 and displaced in the z direction and advantageously also in the y direction serves as a support for the module supports MT and for their connection to the side member, for which screws can be guided through the second profile limb or preferably via a bent end portion EA in continuation of the second profile leg in the manner mentioned Staples BK and screws ST with displaceable in a groove of the module carrier head a position-variable connection.

The first and the second profile legs are connected via a third profile leg PS3, which runs substantially perpendicular to the first and second profile legs in an x-z plane. In the z-direction, a profiling in the form of beads according to FIG. 1 and FIG. 3 or a triangular bent edge as shown in FIG. 2, which deviates from a flat profile of the third profile limb, can be provided for further mechanical reinforcement.

For further stiffening of the sheet metal profile can be provided in continuation of the first profile leg PS1 and angled against this, preferably by approximately 90 °, a fourth profile leg PS4, which is advantageously shorter in the z direction than the third profile leg. Relative to the longitudinal direction y of the module carrier MT, advantageously the second profile limb adjoins the upper and the fourth profile limb at the lower edge of the first profile limb. The longitudinal beam profiles form with the first, the third and the fourth profile leg substantially an upwardly open U-profile, in which over the advantageously shorter fourth profile leg in the longitudinal direction x extending power cable can be inserted. The side rail profiles advantageously have drainage openings for the discharge of rainwater.

The connecting element VE advantageously contains a first flat plate-shaped section PA1 in a yz plane and a preferably perpendicular thereto angled second section PA2. The second section PA2 is advantageously connected to the first section PA1 at its plate edge PK facing the longitudinal members or the module carriers and the solar modules in the z direction, and extending in the y direction. bound and is advantageously in an xy plane. The second section can advantageously serve for fastening the longitudinal members on the connecting element by means of screws SL. First and second sections are advantageously formed in one piece by a folded along PK PK. On the sheet further stiffening structures not shown in the example outlined may be provided.

For attachment of the connecting element VE with the bottom support BS is advantageously another plate portion BP1, which runs parallel to one of the side surfaces SF of the bottom support BS and can be applied to this, at least with the first portion PA1, preferably also connected to the second portion PA2, in particular welded. Advantageously, two such further plate sections BP 1, BP2 are provided, which bear against opposite sides of the floor support BS. The attachment of the connecting element with the floor support is advantageously carried out by screwing the two other plate sections BP1, BP2 with the floor support. The two further plate sections can also be connected together to form a bracket.

The solar modules SM are in each case two adjacent module carriers in the x direction and are secured on them by terminals KL. In other z. B. from DE 20 2005 012 993 U1 also known arrangement solar modules can be inserted between two successive in the x-direction module carrier.

In the embodiment sketched in FIGS. 4 and 5, to illustrate possible variations of various elements, the longitudinal members are selected as extruded profiles SP1, SP2 with a closed chamber cross-section and the construction of the connecting element VH and its attachment to the floor Prop BR are designed differently. In the coordinate system whose x-axis is perpendicular to the plane of Fig. 4, again additional coordinates v for the vertical direction and h for the horizontal direction are shown. The extruded profiles with closed chamber cross-section are particularly advantageous for bridging large distances of longitudinally adjacent floor supports because of the bending stiffness.

The cross-section of the extruded profiles sketched in the example shows a first profiled surface PF 1, with which the longitudinal member rests on the connecting element VH. In the first profile surface, which runs essentially in an xy plane, a channel SK is advantageously designed as an undercut groove, in which heads of fastening screws BE or the like can be used as fastening elements between connecting element and longitudinal member. The second profile surface PF2, on which the module carrier rests, is connected to the first profile surface via the third profile surface PF3 and angled away from the third profile surface by a section PF21 in the y direction and serves with this section for fastening the module carrier to the already way described by means of the bracket BK. The second profile surface is at the same time continued downward against the third profile surface in the y direction with a surface section PF22 forming a wall of the chamber profile, which is again connected to the first profile surface via the fourth profile surface, so that a particularly stable closed chamber cross section is created. The cross-section of the extruded profiles is substantially rectangular in the example outlined with advantage, and including the fastening structures symmetrical with respect to two orthogonal planes. In the longitudinal beam SP1, an intermediate piece ZS for connecting two longitudinally abutting sub-carriers is located, which z. B. is inserted as a four-band pipe section in the chamber cross-section of the abutting sub-carrier and connected to both sub-carriers. The connecting element between floor support BR and longitudinal members in turn comprises a first plate section PA1 in a yz plane and a second plate section PA2 in an xy plane of the selected xyz coordinate system, wherein the two sections PA1, PA2 advantageously along an edge extending in the y direction are integrally connected and made of a folded flat sheet metal blank. A third plate section PA3 parallel to the first plate section PA1 is arranged on the side of the floor support BR facing away from the first plate section in the x direction, so that the upper end of the floor support is enclosed in the x direction between the first and third plate sections. Connected to the third plate section are fourth and fifth plate sections PA4, PA5, which are advantageously oriented predominantly vertically and are preferably designed with the third plate section as a double folded plate. The fourth and the fifth plate portions connect the third plate portion PA3 in the longitudinal direction x with the first plate portion PA1 and are preferably welded thereto. Third, fourth and fifth plate portions extend in the vertical direction v up to the second plate portion PA2 and are preferably welded thereto, so that the plate portions PA3 to PA5 with parts of the plate portions PA1, PA2 define a downwardly open cavity, which the upper end of Floor support BR surrounds.

An attachment of the connecting element VH to the floor support preferably takes place by means of screws VS or comparable fastening elements guided in the longitudinal direction through the first and third plate sections and the floor support. In the example shown, the floor support is provided with abutment surfaces lying in the x-direction between the first and third panel sections. tensioned. Fig. 5 shows the floor support BR as a square tube in said cavity with a vertical viewing direction.

4 also indicates that the connecting element VH and with this the module carrier and modules limited relative to the floor support about a perpendicular to the plane in the x direction extending pivot axis (SA) variably alignable and in different orientations about the illustrated center position fixable.

For this purpose, guides F1, F2 are provided in the floor support and / or preferably in the first and third plate sections, which in the example shown are designed as circular arc sections around a common center approximately in the plane of the second plate section. The circular arc sections advantageously also allow slight linear alignment corrections in the horizontal direction.

As a rule, the features of the various exemplary embodiments are, insofar as not compelling reasons stand in the individual case between the exemplary embodiments, interchangeable and therefore to understand the sketched feature combinations only as two of several possibilities.

The features indicated above and in the claims, as well as the features which can be seen in the figures, can be implemented advantageously both individually and in various combinations. The invention is not limited to the described exemplary embodiments, but can be modified in many ways within the scope of expert knowledge.

Claims

Claims: 1. support arrangement for solar system, in particular photovoltaic system, with a plurality of solar modules (SM), with a plurality of in a row in a horizontal longitudinal (x) spaced floor supports (BS, BR), with a longitudinally elongated elongated longitudinal member arrangement, with the side rail assembly connected to the floor supports connecting elements, and with several held on the side rail assembly, transversely to the longitudinal direction and inclined to the horizontal module supports, rest on soft solar modules, characterized in that the longitudinal beam arrangement two transversely to the longitudinally spaced side members (LT1, LT2, SP1, SP2 ) and the module carriers (MT) are respectively held on both longitudinal members. 2. Arrangement according to claim 1, characterized in that the two longitudinal members are each connected via a common connecting element (VE, VH) with a floor support. 3. Arrangement according to claim 2, characterized in that the connecting element tion a flat, substantially flat first portion (PA1) with a surface normal pointing in the longitudinal direction and a second section (PA2) angled against the surface of the first section. 4. Arrangement according to claim 3, characterized in that the first and the second portion (PA1, PA2) are parts of a folded sheet. 5. Arrangement according to claim 3 or 4, characterized in that the second section on an upwardly facing edge of the first Ab- Section connects and runs substantially parallel to the module carriers (MT). 6. Arrangement according to claim 5, characterized in that the second portion (PA2) extends substantially over the entire length of the first portion (PA1) parallel to the module carriers. 7. Arrangement according to one of claims 3 to 6, characterized in that the side members are fastened on the second portion (PA2). 8. Arrangement according to one of claims 3 to 7, characterized in that at least one further plate portion (BP1, BP2, PA4, PA5) transversely to the first and second portion (PA1, PA2) extends and preferably connected to at least one of these two sections is welded. 9. Arrangement according to claim 7, characterized in that the further plate portion extends substantially vertically. 10. Arrangement according to claim 9, characterized in that the further plate portion (BP1, BP2) for fixing the connecting element to the floor support (BR) is used. 11. Arrangement according to one of claims 3 to 9, characterized in that the connecting element includes a parallel to the first portion (PA1) portion (PA3), which includes the bottom support (BR) between itself and the first portion. 12. Arrangement according to claim 11, characterized in that the first and the parallel section (PA1, PA3) serve for fastening of the connecting element to the floor support. 13. Arrangement according to claim 8 and claim 12, characterized in that the first and the parallel section (PA1, PA3), the second section (PA2) and two further plate sections (PA4, PA5) connected to each other, in particular welded and a form a downwardly open cavity which surrounds the upper end of the floor support (BR). 14. Arrangement according to one of claims 1 to 13, characterized in that the longitudinal members are designed as profiles with a plurality of profile surfaces. 15. An arrangement according to claim 14, characterized in that the Längsträ- ger with a first profile surface (PS1, PF1) on the connecting elements (VE, VH) are fastened and on a second profile surface (RS2, PF21) carry the module carrier (MT) and a third profile surface (PS3, PF3) connects the first and second profile surface. 16. Arrangement according to claim 14 or 15, characterized in that the third profile surface is substantially perpendicular to the first and second profile surface. 17. Arrangement according to one of claims 11 to 13, characterized in that a fourth profile surface (PS4, PF4) following the first profile surface (PS1, PF 1) is provided and preferably substantially parallel to the third profile surface (PS3, PF3 ) runs. 18. Arrangement according to claim 14, characterized in that the fourth profile surface (PS4) is shorter than the third profile surface (PS3). 19. Arrangement according to claim 15, characterized in that, relative to the longitudinal direction of the module carrier inclined relative to the horizontal, the third profiled surface (PS3, PF3) at the upper edge and the fourth profiled surface (PS4, PF4) at the lower edge of the first profiled surface ( PS1, PF 1). 20. Arrangement according to one of claims 14 to 19, characterized in that the first, third and fourth profile surface (PS1, PS3, PS4) form an upwardly open U-profile. 21. Arrangement according to one of claims 14 to 20, characterized in that the longitudinal members (LT1, LT2) are designed as formed sheets with integrally connected profile surfaces. 22. Arrangement according to one of claims 14 to 19, characterized in that the longitudinal members are designed as extruded profiles (SP1, SP2). 23. Arrangement according to one of claims 1 to 22, characterized in that the module carrier (MT) in the longitudinal direction of the side members are arbitrarily positionable. 24. Arrangement according to one of claims 15 to 23, characterized in that the module carrier (MT) by means of the second profile surface (PS2, PF21) behind engaging brackets (BK) are mounted on the side rail assembly. 25. Arrangement according to claim 24, characterized in that the second profile surface (PS2, PF21) of the third profile surface (PS3, PF3) in the longitudinal direction (y) of the module carrier (MT) is arranged pointing upwards. 26. Arrangement according to one of claims 1 to 16, characterized in that the mutual distance of the two side members (DL), preferably 40%, in particular at least 60% of the distance (DB) of the attachment points of a module carrier (MT) with the two side members ( LT1, LT2). 27. Arrangement according to one of claims 1 to 26, characterized in that between two in the direction of the side members successive floor supports (BS, BR) with connecting elements in the longitudinal direction (x) spaced module carrier (MT) are arranged. 28. Support arrangement according to one of claims 1 to 27, characterized in that the connecting elements with the module carriers about a longitudinal direction (x) parallel pivot axes (SA) relative to the floor supports (BR) in different angular orientations are fixed. 29. Solar system with a support arrangement according to one of claims 1 to 28 and with a plurality of solar modules resting on the module supports. 30. Solar system according to claim 29, characterized in that power cables are inserted into the side rail assembly.