DE202008004521U1 - Two-axis swiveling carrying device for solar collectors - Google Patents

Abstract

Around two axes pivotable support means (10) for at least a collector surface, in particular for one or a plurality of photovoltaic elements (30), with a rotatable column (20), which is a pivoting device for receiving a support frame (22) for the at least one collector surface comprises, characterized in that the rotatable column (22) at least Sectionally having a reinforcement or stiffening.

Description

The The present invention relates to a biaxially pivotable carrying device for solar collectors with the characteristics of the generic term of the independent claim.

Heat collectors, especially solar panels are often mounted on south facing rooftops. This type of roof application ensures that the energy of the sun's rays can be optimally utilized. If solar collectors are to be used without a corresponding building roof being available - for example, on a meadow or a flat roof - it makes sense to arrange these likewise inclined and oriented to the south. Such a support device in the form of a Aufständerung for solar panels is, for example, in DE 10 2005 015 346 A1 shown. This support means for a roof-shaped solar system provides a Pfette between solar modules and two or more inclined to the horizontal arranged carriers arranged support means which connects the solar modules with the carriers. The support device is formed from a sheet steel profile and has a hat-like profile in cross section with a lid and two webs. The webs extend from the solar modules to the carriers.

photovoltaic elements for the conversion of solar radiation energy into electrical energy have a relatively limited efficiency. To achieve For a maximum energy yield, it is necessary to use the surfaces possible to align perpendicular to the sun's direction of irradiation. To adapt the photovoltaic elements to the changing position of the sun are swivel stands, so-called. Tracker, become known, which are able, the collector surfaces in the desired position. This also applies to concentrating photovoltaic modules.

One The primary object of the invention is seen in a simple Built-up and stable, biaxially pivotable support structure to provide for solar collectors, which can be mounted quickly and inexpensively.

This The aim of the invention is with the subject of the independent Achieved. Features of advantageous developments of the invention result from the dependent claims.

Around the largest load moment on the flange plate of the tracker, the mast is made up of two different ones welded strong sheets. This sheet is not over the entire mast height, but only up to the height, which is needed for stability reasons. Thus, with the same stability material quantities and costs reduced. According to a preferred embodiment the mast consists of two telescoping tubes, a different one Have tube diameter. The inner flange-near pipe does not overflow the entire mast length but is only in the range high Bending stresses arranged.

in principle The tracker consists of a mast and a so-called awning. On the awning are the photovoltaic or thin-film panels mounted over. This awning is powered by two electric motors daily updated from the east to the sun West, according to the position of the sun every day and seasonal. This ensures maximum utilization of the photovoltaic modules. This is an approximately right angle of the PV area necessary to the sun.

According to one Another embodiment, the awning also means only one electric motor can track the position of the sun. These Embodiment further includes a manual lever. With this the awning becomes according to the season manually set optimally.

The Production of the components takes place in the production steelworks, so that the work-intensive assembly can be done on the tracker. It is therefore not necessary, the time-consuming assembly steps in the open field during final assembly. By The chosen construction becomes essential in the field facilitates and can provide extra protection against breaking provide the bearing fittings. Made of profiled steel sheets, get the conical cutouts, the bearing block for the Awning formed. This arrangement proves to hang the awning as particularly advantageous.

By the V-shaped fork makes assembly much easier, because the bearing is easy to hit during assembly. At 90 Offset degrees are mounted on the fork import slopes, which precenter the awning biaxially. On the awning is a bolt and / or a socket inserted, the bearing point forms with the clevis. The construction becomes a backlash-free Storage reached, the brass bushes or discs one good sliding bearing property. Alternatively, too used an A-shaped fork, which simplified the same Assembly possible.

The upper bearing point has a brass bushing. According to an alternative embodiment, a bush made of dimensionally stable plastic is used (???). Once the awning is inserted into the V-guide, the awning is fixed in the X and Y direction and can without high outside Force effects are unlikely to be lifted from storage. To protect against falling out in extreme wind loads, a retaining plate is placed over the bolt and secured tension-free, for example, screwed laterally over the bearing pin. The bearing pin has enough clearance to the holding plate, so that no additional frictional forces. The retaining plate can be modified according to a further embodiment on customer request so that the bearing is provided with a lifetime lubrication.

The Screwing the panels on the track sails can be done as follows be provided. The sail of the tracker usually consists of Square tube or C-profiles to simplify installation. There Usually the assembly in the open field happens, are in the square tubes or C-profiles Rivet nuts or flow hole shaped threads inserted, flush or with paragraph pressed into the profile become. This happens under ideal operating conditions in the factory. This gives the fastening screw that over a hold-down profile secures the panels, the counter bearing (screw point). Without holding back can be bolted from above. There are self-locking screws or nuts used to loosen the screw connection to prevent. The screw can thus in such a way done that holding back or securing with the help of nuts is not necessary.

Between the square tube or C-profile and the panels is a stainless steel disc, which sufficient distance between the materials (aluminum and zinc) offers, laid. In this way, a chemical reaction between the zinc surface of the tracker and the alu rim of the panel avoided.

Further Features, objects and advantages of the present invention will be apparent The following detailed description of a preferred embodiment of the invention, as a non-limiting example serves and refers to the accompanying drawings. Identical components basically have the same reference numerals on and are sometimes not explained several times.

1a / b each show a trackable about two axes tracker;

2a / b each show a detail view of a column;

3a / b shows a detailed view of an upper bearing support of the column without holding plate ( 3a ) and with retaining plate ( 3b );

4 shows the sunshade used in the storage;

5 shows the secured with a retaining plate solar sail;

6 shows a sectional view of the solar panels connected to the awning and the attachment of the panels with the awning;

7 . 8th . 9 show different views in wireframe representations and

10 shows a side view of the pivotable about two axes tracker.

Basically, the tracker exists 10 from a mast 20 and a so-called awning 22 , On the awning are the photovoltaic or thin-film panels 30 mounted over. This awning 22 is adjusted via two electric motors as needed the sun's position from east to west, ie there is an alignment according to the daytime and seasonal sun. This is a maximum utilization of the photovoltaic modules 30 ensured. For this, an approximately right angle of the PV surface to the sun is necessary. The production of the components takes place in the manufacturing steel construction, so that the labor-intensive assembly can be done on the tracker. It is therefore not necessary to carry out the time-consuming assembly steps in the open field during the final assembly. The chosen design makes field installation much easier and can provide additional protection against breakage of the bearing glands. From profiled steel sheets, which receive conical cutouts, the bearing block 40 formed for the awning.

The largest load moment on the flange plate of the tracker ( 1 ) is the mast 20 welded from two different strong tubes (sheet metal) ( 2a / B). The sheet 50 does not go over the entire mast height, but only up to the height, which is needed for stability reasons. This reduces material quantities and costs while maintaining the same stability.

As in 1a and 1b clearly shown, is the awning 22 Off-center on the mast 20 stored. This eccentric bearing is necessary to keep the changing load on the engine as small as possible under normal wind conditions. In normal operation, the engine is subjected to the seasonally required adjustment to train. As a result, the drive can be spared and the service life extended. According to a further embodiment, the awning 22 also in the middle of the mast 20 be stored.

Through the V-shaped fork ( 3 ), the assembly is much easier because the bearing 40 easy to hit during assembly. 90 degrees offset are mounted on the fork insertion bevels that the awning 22 pre-center at right angles. On the awning is a bolt 42 or a socket plugged into the bearing 40 forms with the clevis ( 4 . 5 ). Through the construction of a play-free storage is achieved, which receives a good slide bearing property brass bushes or discs.

The upper depository 40 has a brass bushing. Once the awning 22 is inserted into the V-guide, is the awning 22 Fixed in the X and Y directions and can hardly be lifted out of storage without external high force effects. To protect against falling out in extreme wind loads is laterally over the bearing pin 42 a holding plate 44 over the bolt 42 plugged in and tension-free screwed ( 5 ). The bearing bolt 42 has to the holding plate 44 sufficient play, so that no additional frictional forces arise. Furthermore, it is possible to integrate lubrication for life.

The screwing of the panels 30 on the track sails 22 ( 6 ) may be provided as follows. The sail 22 The tracker usually consists of square tube or C-profiles 60 to simplify the assembly. Since most of the assembly is done outdoors, are in the square tubes or C-profiles 60 Rivnuts 62 or flow-hole shaped threads are introduced, which are pressed flush or with paragraph in the profile. This happens under ideal operating conditions in the factory. This gives the fixing screw 64 that have a holddown profile 66 the panels secures, the counter bearing (screw point). Without holding back can be bolted from above. Self-locking screws or nuts are used to prevent loosening of the screw connection. Between the square tube / C-profile 60 and the panels 30 becomes a stainless steel liner 68 , which provides sufficient distance between the materials (aluminum and zinc), laid. In this way, a chemical reaction between the zinc surface of the tracker 10 and the Alurand of the panel 30 avoided.

The The invention is not limited to the above embodiments limited. Rather, a variety of variants and Modifications conceivable that of the invention Use your thoughts and therefore also in the protection area fall.

10

tracker

20

Mast / rotatable pillar

22

awning

30

Photovoltaic panel

40

bearing block

42

bolt

44

Halteblech

50

Support panel

60

Square tube

62

Rivet nut

64

fixing screw

66

Hold Profile

68

Stainless steel liner

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005015346 A1 [0002]

Claims (17)

Supporting device pivotable about two axes ( 10 ) for at least one collector surface, in particular for one or more photovoltaic elements ( 30 ), with a rotatable column ( 20 ) comprising a pivoting device for receiving a support frame ( 22 ) for the at least one collector surface, characterized in that the rotatable column ( 22 ) has at least in sections a reinforcement or stiffening. Carrying device according to claim 1, characterized in that the column ( 20 ) a second stiffening tube ( 50 ) having a smaller pipe diameter, which is connected to the column ( 20 ) is welded. Carrying device according to one of the preceding claims, characterized in that the inner support tube ( 50 ) is arranged in a range of high bending stresses. Carrying device according to claim 2, characterized in that the flange close to the support tube (???) (???) ( 50 ) is arranged in a range of high bending stresses. Carrying device according to one of the preceding claims, characterized in that the carrying device ( 10 ) an awning pivotable about two axes ( 22 ). Carrying device according to one of the preceding claims, characterized in that on the awning ( 22 ) one or more collector surfaces ( 30 ) are mounted. Carrying device according to one of the preceding claims, characterized in that the awning ( 22 ) is trackable by means of at least two electric motors the sun. Carrying device according to one of the preceding claims, characterized in that the awning ( 22 ) is trackable by means of an electric motor and a manual adjustment lever the sun. Carrying device according to one of the preceding claims, characterized in that the column ( 20 ) and / or the awning ( 22 ) are formed from pre-assembled components. Carrying device according to one of the preceding claims, characterized in that the column ( 20 ) an upper bearing block ( 40 ) for receiving the awning ( 22 ) having. Carrying device according to one of the preceding claims, characterized in that the upper bearing block ( 40 ) has conical cutouts with a V- or A-shaped fork. Carrying device according to one of the preceding claims, characterized in that the fork insertion bevels for biaxial pre-centering of the solar sail ( 22 ) has during assembly. Carrying device according to one of the preceding claims, characterized in that on the awning ( 22 ) a bolt ( 42 ) or a socket is inserted, which forms the bearing with the clevis. Carrying device according to one of the preceding claims, characterized in that laterally beyond the bearing pin ( 42 ) a retaining plate ( 44 ) over the bolt ( 42 ) and screwed tension-free is. Carrying device according to one of the preceding claims, characterized in that the awning ( 22 ) eccentrically on the rotatable column ( 20 ) is stored. Carrying device according to one of the preceding claims, characterized in that the sun sail rivet nuts ( 62 ) or flow hole shaped threaded holes for screwing the photovoltaic elements ( 30 ) from above. Carrying device according to one of the preceding claims, characterized in that between the square tube or C-profile ( 60 ) and the photovoltaic elements 30 a stainless steel liner ( 68 ) is located.