CN215222104U

CN215222104U - Girder and photovoltaic tracking support thereof

Info

Publication number: CN215222104U
Application number: CN202121515394.6U
Authority: CN
Inventors: 陈岚崴; 王士涛; 马丽君
Original assignee: Arctech Solar Holding Co Ltd
Current assignee: Arctech Solar Holding Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-12-17
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a girder and use and photovoltaic tracking support thereof, wherein, the girder includes: the flat plate and the elliptic arc plate are fixedly connected with the corresponding ends of the elliptic arc plate respectively to form a ring shape, and the plane where the flat plate is located is vertical to the long axis of the ellipse where the elliptic arc plate is located. And simultaneously provides the application of the main beam in the photovoltaic tracking support. Photovoltaic tracking support, including the girder, still include: a column; the bearing block comprises a bearing ring, a Z-shaped supporting plate and a bottom plate which are sequentially connected, the section shape of the Z-shaped supporting plate is Z-shaped, a main beam is installed in the bearing ring, a flat plate of the main beam is opposite to the photovoltaic assembly, and the bottom plate is connected with the stand column. The utility model discloses a girder is under the prerequisite of guaranteeing the same thickness, and the transverse section is to the moment improvement, practices thrift the cost, is applied to the hot spot effect that photovoltaic tracking support internal energy slowed down two-sided photovoltaic module, prolongs two-sided photovoltaic module's life-span.

Description

Girder and photovoltaic tracking support thereof

Technical Field

The utility model relates to a structural design field of support is trailed to the photovoltaic especially relates to girder and support is trailed to photovoltaic thereof.

Background

In the prior art, photovoltaic power generation is a trend and is widely applied to various places, and the photovoltaic power generation directly converts solar energy into electric energy according to the principle of photovoltaic effect. No matter independent use or grid-connected power generation, a photovoltaic power generation system mainly comprises a photovoltaic module, a controller and an inverter, and in order to ensure that the photovoltaic module keeps high power generation efficiency, a photovoltaic tracking support is developed, the photovoltaic module is installed on a main beam, and the main beam drives the photovoltaic module to rotate along with the movement of the sun.

Since the main beam of the photovoltaic tracking support needs to achieve a certain bending strength, U.S. Pat. No. US7647924B2, SYSTEM FOR SUPPORTING ENERGY CONVERSION MODULES, wherein a main beam is disclosed, which is formed by a circular arc plate and a flat plate, although the bending strength of the main beam is partially improved, the weight of the main beam is still larger to achieve the same strength and rigidity, and the cost of the main beam is heavier within the cost of the photovoltaic tracking support, thereby causing the cost of the photovoltaic tracking support to be huge.

In addition, the girder of photovoltaic tracking support still need have certain torsional strength and rotation smoothness, and the card is died, reduction life easily appears in the pivoted in-process in some girder now.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a girder and support is trailed to photovoltaic thereof, wherein, the transverse section of girder is supported the square and is improved, and the quality is lighter, practices thrift the cost of girder. After the photovoltaic tracking support is applied to the main beam, the stress is more uniform, the rotation is smooth, and the installation is more convenient and rapid except for realizing the technical effect.

The utility model provides a technical scheme as follows:

a main beam, comprising: the device comprises a flat plate and an elliptic arc plate, wherein two ends of the flat plate are respectively fixedly connected with corresponding ends of the elliptic arc plate to form a ring shape, and the plane of the flat plate is vertical to the long axis of the ellipse of the elliptic arc plate.

In the structure, due to the special shape of the main beam, when the main beam is applied to a photovoltaic tracking support, the transverse section resisting moment of the main beam is improved by sacrificing less torsion resistance, and compared with an arc D-shaped main beam in the prior art, under the condition of ensuring the same thickness, the transverse section resisting moment is improved by 5.14%, and the steel is saved by 0.04% per meter, so that the main beam has better practical application value.

Preferably, a transition section is arranged between the flat plate and the elliptic arc-shaped plate, and the outer surface of the transition section is in smooth transition.

Connect dull and stereotyped and oval arc through the changeover portion, avoid dull and stereotyped sharp-pointed and fish tail staff of junction with oval arc.

Preferably, the outer surface of the plate and/or the transition section has a reflective layer.

When the double-sided photovoltaic assembly is installed on the main beam, because one part of the double-sided photovoltaic assembly can be shielded by the main beam and cannot irradiate light, the shielded part of the double-sided photovoltaic assembly consumes energy generated by other parts of the double-sided photovoltaic assembly as load, and the shielded part of the double-sided photovoltaic assembly can generate heat to form a hot spot effect, and the effect can seriously shorten the service life of the double-sided photovoltaic assembly. The structure reflects light rays to the shielded part of the double-sided photovoltaic module through the reflecting layer, reduces the hot spot effect and prolongs the service life of the double-sided photovoltaic module.

A main beam, comprising: the main beam is annular, and the length L1 of the arc-shaped plate on the cross section is more than or equal to 76% of the circumference L2 of the main beam on the cross section.

Preferably, the arc plate is in the shape of a circular arc or an elliptical arc.

Preferably, the flat plate comprises a main plate and two side plates located on two sides of the main plate, two side ends of the main plate are respectively connected with the two side plates, the two side plates are perpendicular to the main plate, two free ends of the arc-shaped plate are respectively connected with the two side plates correspondingly, and the length of the main plate on the cross section is smaller than the maximum chord length of the arc-shaped plate on the cross section.

A girder comprises a flat plate and an arc-shaped plate, wherein the flat plate comprises a main plate and two side plates positioned on two sides of the main plate, two side ends of the main plate are respectively connected with the two side plates, the two side plates are perpendicular to the main plate, the arc-shaped plate is positioned on one opposite side of the flat plate, and two free ends of the arc-shaped plate are respectively correspondingly connected with the two side plates, so that the girder is a circumferentially closed tubular product; the main beam is provided with a rotating center, an included angle A is formed between two free ends of the arc-shaped plate and two connecting lines of the rotating center, wherein A is more than or equal to 120 degrees and less than or equal to 180 degrees.

Preferably, the length of the main plate in cross section is equal to the maximum chord length of the arc-shaped plate in cross section.

The utility model provides a support is trailed to photovoltaic, includes aforementioned girder, still includes: a column; a bearing housing, the bearing housing comprising: from last race ring, Z type backup pad and the bottom plate that connects gradually extremely down, Z type backup pad is the Z type in the ascending section shape of horizontal direction, the girder install in the race ring, just the flat board of girder is just to photovoltaic module, the bottom plate is connected with the stand.

In the structure, the bearing ring is fixed by the Z-shaped supporting plate, so that the stress of the Z-shaped supporting plate is more uniform and the bearing load is larger compared with the bearing ring fixed by a supporting structure with a C-shaped section in the prior art.

Preferably, the photovoltaic tracking rack further comprises: the stand footstock, the stand footstock includes first connecting plate, the both ends of first connecting plate all extend towards the stand and obtain the second connecting plate, the second connecting plate is connected with the stand, be equipped with first level (l) ing waist hole on the first connecting plate, the bottom plate corresponds first level (l) ing waist hole department is equipped with second level (l) ing waist hole, first level (l) ing waist hole passes through bolt locking with second level (l) ing waist hole, the major axis in first level (l) ing waist hole just with the major axis mutually perpendicular in second level (l) ing waist hole the major axis in first level (l) ing waist hole is on a parallel with the extending direction of girder or the major axis perpendicular to in first level (l) ing waist hole the extending direction of girder.

When the position or the angle of the main beam is adjusted, the bolt is loosened, then the position of the main beam in the axis direction of the main beam and the position of the main beam in the axis direction perpendicular to the axis direction are adjusted through the matching of the first horizontal adjustment waist hole and the second horizontal adjustment waist hole, or the angle of the main beam on the horizontal plane is adjusted by rotating the main beam, and finally the bolt is screwed to fix the main beam.

Preferably, the number of the first horizontal adjustment waist holes is two, two of the first horizontal adjustment waist holes are symmetrical about the center of the first connection plate, the number of the second horizontal adjustment waist holes is two, and two of the second horizontal adjustment waist holes are symmetrical about the center of the bottom plate.

Through setting up two first level (l) ing waist holes and second level (l) ing waist hole respectively, and because its central symmetry about first connecting plate and bottom plate respectively equally divide, consequently, when carrying out angle adjustment to the girder through swivel base plate, can make the bottom plate regard its center as the rotation center, the angle of adjustment girder is more accurate.

Preferably, every all be equipped with vertical regulation waist hole and vertical fixed orifices on the second connecting plate, the stand corresponds the position department in vertical regulation waist hole is equipped with the stand and adjusts the waist hole, the stand corresponds the position department in vertical fixed orifices is equipped with the stand fixed orifices, the major axis in vertical regulation waist hole is mutually perpendicular with the major axis in stand regulation waist hole, the stand is adjusted the waist hole and is passed through bolt-up with vertical regulation waist hole and be connected, the stand fixed orifices passes through bolt-up with vertical fixed orifices and be connected.

In the structure, the vertical adjustment waist hole and the vertical column adjustment waist hole are adjusted, so that the angle of the vertical column top seat in the height direction can be adjusted, and the rotation center of the vertical column top seat is the center of the vertical fixing hole.

Preferably, the first end of the main beam is a contracted section, the contracted section is formed by extruding the first end of the main beam, and a locking nut is welded or riveted on the inner surface of the contracted section; the contracted pipe section of the main beam extends into the second end of the adjacent main beam, and the locking bolt sequentially penetrates through the second end of the adjacent main beam and the contracted pipe section of the main beam and is screwed and fixed with the locking nut at the corresponding position.

By adopting the structure, the connection of the adjacent main beams is realized, compared with the connection of the connecting plates in the prior art, the method has the advantages that the number of bolts is large, the installation speed is low, the locking nut is arranged on the inner surface of the contraction section in advance, the locking bolt can be screwed up with the locking nut at the corresponding position, the installation speed is high, and the cost is saved because the connecting plates are not required to be additionally used.

Preferably, the number of the locking nuts is a plurality, the locking nuts are uniformly arranged on the inner surface of the contraction section of the main beam in a surrounding manner, and the locking nuts and the locking bolts are arranged in a one-to-one correspondence manner.

The connection of adjacent girder is realized through a plurality of lock nuts of evenly establishing all around, and connection between them is more firm.

The utility model provides a pair of girder and use and photovoltaic tracking support thereof can bring following beneficial effect:

the utility model discloses a girder has better under the prerequisite that reaches the same thickness, and the transverse section is to the square and the quality is lighter, and compared with prior art, the transverse section is to square improvement 5.14%, practices thrift steel 0.04% per meter, and when it was applied to in the photovoltaic tracking support, girder torsional resistance improved, and the rotation is smooth, does not have the card phenomenon of dying, and the even atress of bearing to improve life; the girder can be with on the two-sided photovoltaic module of light reflection partial that is shielded to slow down two-sided photovoltaic module's hot spot effect, prolong two-sided photovoltaic module's life. Meanwhile, as the Z-shaped supporting plate is adopted to support the bearing ring, compared with a supporting structure with a C-shaped cross section in the prior art, the stress of the Z-shaped supporting plate is more uniform, so that the load capacity of the Z-shaped supporting plate is improved.

Drawings

The above characteristics, technical features, advantages and realisations of the main beam and its applications and of the photovoltaic tracking support will be further explained in a clearly understandable way with reference to the following description of preferred embodiments, with reference to the attached drawings.

FIG. 1 is a perspective view of a main beam;

FIG. 2 is a cross-sectional view of the main beam;

FIG. 3 is a schematic perspective view of a photovoltaic tracking mount;

FIG. 4 is a schematic view of the connection of adjacent main beams;

FIG. 5 is a schematic perspective view of a main beam at a reduced section;

FIG. 6 is a schematic view of a first main beam at a reduced section;

FIG. 7 is a schematic view of a second main beam at a reduced section;

FIG. 8 is a perspective view of the bearing housing;

FIG. 9 is a top view of the base plate and Z-shaped support plate;

FIG. 10 is a schematic perspective view of a column top mount;

FIG. 11 is a cross-sectional view of another radius plate girder;

FIG. 12 is a cross-sectional view of an alternative elliptical arc main beam;

FIG. 13 is a cross-sectional view of another centrally symmetric ring main beam;

FIG. 14 is a cross-sectional view of another radius plate girder;

FIG. 15 is a cross-sectional view of another radius plate girder;

the reference numbers illustrate:

the structure comprises a main beam 1, a pipe reducing section 1a, a first connecting hole 1b, a second connecting hole 1c, a flat plate 1d, a transition section 1e, an elliptical arc plate 1f, a locking nut 2a, a locking bolt 2b, a stand column 3, a first connecting plate 4a, a second connecting plate 4b, a first horizontal adjusting waist hole 4c, a vertical adjusting waist hole 4d, a vertical fixing hole 4e, a bottom plate 5, a second horizontal adjusting waist hole 5a, a support plate 6-Z, a bearing ring 7, the length of an arc plate L1, the perimeter of the main beam L2 in the cross section, a main plate 11d, a side plate 12d, an arc plate 1f, two free ends of the

arc plate

11f,12f and a rotation center 13 d.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product.

[ example 1 ]

As shown in fig. 1 to 2, embodiment 1 discloses a specific implementation of a main beam, which specifically includes: the flat plate 1d and the elliptic arc plate 1f, both ends of the flat plate 1d are respectively fixedly connected with the corresponding ends of the elliptic arc plate 1f to form a ring shape, the plane of the flat plate 1d is vertical to the major axis of the ellipse of the elliptic arc plate 1f, in order to realize the smooth transition between the flat plate 1d and the elliptic arc plate 1f, a transition section 1e is arranged between the flat plate 1d and the elliptic arc plate 1f, and the outer surface of the transition section 1e is in smooth transition.

When the main beam 1 is installed on a photovoltaic tracking support, the main beam 1 is used for carrying out a bending resistance test and calculating the weight of a unit length, and specific data are listed in the following table 1.

[ TABLE 1 ]

In the case that the arc D-shaped main beam in US7647924B2 mentioned in the background art is mounted on the photovoltaic tracking support, so that the arc D-shaped main beam has the same thickness as the main beam 1 of the present embodiment, the transverse cross-sectional resisting moment of the arc D-shaped main beam is 46340/mm as measured by an experiment³The weight per unit length is 12.451kg, and comparing the data shown in table 1, it can be seen that the transverse section resisting moment of the main beam 1 of the present embodiment is increased by 5.14% and the cost is saved by 0.04% under the condition of achieving the same thickness.

[ example 2 ]

As shown in fig. 11 to 12, embodiment 2 discloses a specific implementation of a main beam, which specifically includes: the length L1 of the cross section of the arc-shaped plate is greater than or equal to 76% of the perimeter L2 of the main beam on the cross section. Can make the girder rotate in the same direction as smooth like this, do not have the card phenomenon of dying, the even atress of bearing to improve life, simultaneously, still have better antitorque ability and this size and correspond dull and stereotyped 1f down and can provide sufficient mounting surface. When the length L1 of the arc-shaped plate on the cross section is less than 76% of the perimeter L2 of the main beam on the cross section, the main beam is easy to be stuck during the rotation process, and the torsion resistance and the support stability of the whole main beam are reduced. In order to realize smooth transition between the flat plate 1d and the elliptical arc-shaped plate 1f, a transition section is arranged between the flat plate 1d and the elliptical arc-shaped plate 1f, and the outer surface of the transition section is in smooth transition.

In this embodiment, the arc plate 1f may have an arc shape or an elliptical arc shape.

In this embodiment, as shown in fig. 13, the main beam may also be a central symmetrical ring main beam having a cross section including two flat plates 1d and two arc-shaped plates 1 f. The length L1 of the arc plate in cross section is L3+ L4.

[ example 3 ]

As shown in fig. 14, the only difference between embodiment 3 and embodiment 2 lies in the structure of the flat plate 1d, where the flat plate 1d includes a main plate 11d and two side plates 12d located at two sides of the main plate 11d, two side ends of the main plate 11d are respectively connected to the two side plates 12d, and the two side plates 12d are perpendicular to the main plate 11 d. The arc-shaped plate 1f is positioned at the opposite side of the flat plate 1d, and two free ends (11f,12f) of the arc-shaped plate 1f are respectively and correspondingly connected with the two side plates 12d, so that the main beam is a pipe piece with a closed circumferential direction. The length L of the main plate 11d on the cross section is smaller than the maximum chord length T of the arc-shaped plate 1f on the cross section, at the moment, the arc length of the arc-shaped plate 1f is increased, so that the main beam rotates smoothly, the clamping phenomenon does not exist, and the bearing is stressed uniformly. Meanwhile, the main beam has better torsion resistance and bending resistance, the utilization rate of materials is improved, and the cost of the materials is reduced. In the present embodiment, the main beam has a circumferential length L2 in cross section which is the sum of the lengths of the main plate 11d, the two side plates 12d, and the arc-shaped plate 1 f.

[ example 4 ]

As shown in fig. 15, embodiment 4 discloses another specific implementation of the main beam, where the main beam includes a flat plate 1d and an arc-shaped plate 1f, the flat plate 1d includes a main plate 11d and two side plates 12d located at two sides of the main plate 11d, two side ends of the main plate 11d are respectively connected to the two side plates 12d, and the two side plates 12d are perpendicular to the main plate 11 d. The arc-shaped plate 1f is positioned at the opposite side of the flat plate 1d, and two free ends (11f,12f) of the arc-shaped plate 1f are respectively and correspondingly connected with the two side plates 12d, so that the main beam is a pipe piece with a closed circumferential direction. Typically, there is a smooth transition between the main panel 11d and the two side panels 12 d.

The main beam has a centre of rotation 13d, preferably the centre of rotation 13d is located in the area enclosed by the main plate 11d and the two side plates 12d, i.e. the centre of rotation 13d is located on the opposite side of the arc 1 f. The position of the specific rotation center 13d is determined according to design calculation, experiment, or simulation. An included angle A is formed between two free ends (11f,12f) of the arc-shaped plate 1f and two connecting lines of the rotating center 13d, wherein A is more than or equal to 100 degrees and less than or equal to 180 degrees. When the included angle A is less than 100 degrees, the main beam is applied to the photovoltaic tracking support, under the common condition, the rotation limit angle of the photovoltaic tracking support for supporting the photovoltaic module is +/-50 degrees, and the included angle A is less than 100 degrees, so that the main beam has a part of non-circular-arc area to generate friction with the plastic bearing when the photovoltaic tracking support rotates, the plastic bearing is subjected to eccentric force, and the main beam is further caused to generate an eccentric distance. In addition, friction to the plastic bearing is accelerated, and the service life of the plastic bearing is reduced. When the included angle A & gt is 180 degrees, the height H of the whole main beam is reduced, and the bending resistance of the main beam is reduced under the condition that the main beam is subjected to the same load.

In the present embodiment, the included angle a is preferably 120 degrees, and in other embodiments, the included angle a may be 100 degrees or 110 degrees.

Preferably, the length L of the main plate 11d in cross section is equal to the maximum chord length T of the arc-shaped plate 1f in cross section, which can make the flat plate have the longest installation surface, which is beneficial for firmly fixing the purlin. Here, the maximum chord length T is the maximum distance formed by the intersection of the curved plate 11 and a straight line perpendicular to the perpendicular bisector of the main plate 11 d.

[ example 5 ]

As shown in fig. 1-2, in embodiment 5, based on

embodiments

1, 2, 3 and 4, the outer surfaces of the flat plate 1d and the transition section 1e of embodiment 2 have a reflective layer, which is formed by coating a reflective material or wrapping a tinfoil paper, in this embodiment, the reflective material is a metal paint, in other specific embodiments, the reflective material may also be a white paint, a luminescent film, etc., and details thereof are not repeated herein.

When this girder 1 is installed on photovoltaic tracking support, dull and stereotyped 1d is just to two-sided photovoltaic module, and light is reflected the two-sided photovoltaic module department of part that is sheltered from by girder 1 by the reflection stratum to slow down hot spot effect, in the region that all kinds of irradiation resources are different, two-sided photovoltaic module's life-span still can keep 25 years, girder 1 in embodiment 1 is installed on photovoltaic tracking support, in the region that irradiation resources are good, two-sided photovoltaic module can appear the back because hot spot effect and sheltered from the regional phenomenon of inefficacy, thereby two-sided photovoltaic module life-span significantly reduces.

Furthermore, in order to realize diffuse reflection at the flat plate 1d and the transition section 1e and make the light received by the shielded part of the double-sided photovoltaic module more uniform, the outer surfaces of the flat plate 1d and the transition section 1e are designed to be rough, and then a reflecting layer is laid on the rough outer surface, namely the reflecting surface is a diffuse reflecting surface, so that when the light irradiates on the reflecting layer, the diffuse reflection is formed because the reflecting layer is uneven.

Of course, the outer surface of the single flat plate 1d or the outer surface of the single transition section 1e may have a reflective layer, and both the light rays may be reflected at the shielded portion of the double-sided photovoltaic module to a certain extent, so as to alleviate the hot spot effect, and details are not described here.

[ example 6 ]

As shown in fig. 1 to 6 and 8 to 10, embodiment 6 discloses a specific implementation of a photovoltaic tracking support, which includes any one of the main beams 1 in

embodiments

1, 2, 3, 4, or 5, and further includes: the upright post 3 and the bearing seat are connected,

as shown in fig. 8, the bearing housing includes: from last race ring 7, Z type backup pad 6 and the bottom plate 5 that connects gradually down, wherein, Z type backup pad 6 is the Z type in the ascending section shape of horizontal direction, and girder 1 installs in race ring 7, and the dull and stereotyped 1d of girder 1 is just to photovoltaic module, and bottom plate 5 is connected with stand 3. Wherein, Z type backup pad 6 is the bearing structure of C type for the cross sectional shape that adopts among the prior art, and Z type backup pad 6's atress is more even to can bear bigger load.

Preferably, as shown in fig. 3 and 8 to 10, in order to adjust the position and angle of the main beam 1, the present embodiment further includes: stand footstock, wherein, stand footstock includes the first connecting plate 4a of level setting, and the both ends of first connecting plate 4a all extend towards stand 3 and obtain second connecting plate 4b, and second connecting plate 4b is connected with stand 3, and in this embodiment, the both ends of first connecting plate 4a extend downwards and obtain second connecting plate 4b, and second connecting plate 4b is vertical setting promptly.

As shown in fig. 10, the first connecting plate 4a is provided with two first horizontal adjustment waist holes 4c which are symmetrical with respect to the center of the first connecting plate 4a, and the centers of the two first horizontal adjustment waist holes 4c are located on the same diagonal line. As shown in fig. 8 to 9, two second horizontal adjustment waist holes 5a symmetrical with respect to the center of the bottom plate 5 are provided at the position of the bottom plate 5 corresponding to the first horizontal adjustment waist hole 4c, the centers of the two second horizontal adjustment waist holes 5a are located on the same diagonal line, the two second horizontal adjustment waist holes 5a are respectively located at both sides of the Z-shaped support plate, and the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist holes 5a are locked by bolts.

As shown in fig. 8 to 10, the long axis of the first horizontal adjustment waist hole 4c is perpendicular to the long axis of the second horizontal adjustment waist hole 5a, the long axis of the first horizontal adjustment waist hole 4c is perpendicular to the extending direction of the main beam 1, and the long axis of the second horizontal adjustment waist hole 5a is parallel to the extending direction of the main beam 1.

When the horizontal position of the main beam 1 is adjusted, the bolts for locking the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist hole 5a are loosened, the main beam 1 is moved to a proper position, and then the bolts are screwed down to fix the bottom plate 5 and the first connecting plate 4a of the upright post top seat.

When the angle of the main beam 1 in the horizontal direction is adjusted, the bolts for locking the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist hole 5a are firstly loosened, the main beam 1 is rotated by taking the center of the bottom plate 5 as a rotation center, the main beam 1 is adjusted to a proper angle, and then the bolts are screwed to fix the bottom plate 5 and the first connecting plate 4a of the upright post top seat, so that the horizontal position of the main beam 1 can be adjusted firstly, and then the angle of the main beam in the horizontal direction is adjusted, and the adjusting method is the same as that described above.

In other embodiments, the long axis of the first horizontal adjustment waist hole 4c may also be parallel to the extending direction of the main beam 1 and the long axis of the second horizontal adjustment waist hole 5a is perpendicular to the extending direction of the main beam 1, which is not described herein again.

In order to realize the angle adjustment of the pillar top base in the height direction, as shown in fig. 3 and 10, each second connecting plate 4b is provided with a vertical adjusting waist hole 4d and a vertical fixing hole 4e, that is, two second connecting plates 4b of the embodiment are provided with a vertical adjusting waist hole 4d and a vertical fixing hole 4e, the pillar 3 is provided with a pillar adjusting waist hole at a position corresponding to the vertical adjusting waist hole 4d, the pillar 3 is provided with a pillar fixing hole at a position corresponding to the vertical fixing hole 4e, that is, the sidewalls at two sides of the pillar 3 are provided with a pillar adjusting waist hole and a pillar fixing hole, the long axis of the vertical adjusting waist hole 4d is perpendicular to the long axis of the pillar adjusting waist hole, as shown in fig. 10, the long axis of the vertical adjusting waist hole 4d is parallel to the vertical direction, the pillar adjusting waist hole is fastened and connected with the vertical adjusting waist hole 4d through a bolt, the upright post fixing holes are fixedly connected with the vertical fixing holes 4e through bolts.

When the angle of the main beam 1 in the height direction needs to be adjusted through the upright post footstock, the bolt for connecting the upright post adjusting waist hole and the vertical adjusting waist hole 4d is loosened, then the main beam 1 is adjusted to a proper angle in the height direction, and then the bolt is screwed and fixed.

Of course, the long axis of the vertical adjustment waist hole 4d can also be perpendicular to the vertical direction, and meanwhile, the long axis of the vertical adjustment waist hole is parallel to the vertical direction, so that the purpose of adjusting the angle of the main beam 1 in the height direction can be achieved.

As shown in fig. 4 to 6, the first end of the main beam 1 is a contracted section 1a, the contracted section 1a is formed by extruding the first end of the main beam 1 (the left end of the main beam 1 in fig. 5), 8 first connection holes 1b are arranged on the contracted section 1a, the 8 first connection holes 1b are divided into two groups, 4 first connection holes 1b in each group of first connection holes 1b are uniformly arranged on the contracted section 1a in a surrounding manner, and the two groups of first connection holes 1b are arranged along the axial direction of the main beam 1. As shown in fig. 6, a lock nut 2a is welded to each first connection hole 1b on the inner surface of the contraction pipe section 1 a. As shown in fig. 4, a second connection hole 1c is provided at a position, corresponding to the first connection hole 1b of the contraction section 1a, of the second end of the main beam 1 (the right end of the main beam 1 in fig. 5), that is, 8 second connection holes 1c are provided at the second end of the main beam 1, when the adjacent main beams 1 are connected, the contraction section 1a of the main beam 1 extends into the second end of the adjacent main beam 1 and is screwed and fixed with a locking nut 2a at the first connection hole 1b after passing through the second connection hole 1c of the second end of the adjacent main beam 1 and the first connection hole 1b of the contraction section 1a of the main beam 1 in sequence by using a locking bolt 2b, that is, in this embodiment, 8 locking bolts 2b are required to connect the adjacent main beams 1.

In other specific embodiments, the number of the first connection holes 1b, the second connection holes 1c, the locking nuts 2a and the locking bolts 2b is not limited to this example, and may be other numbers, and the first connection holes 1b may not be circumferentially arranged at the contracted pipe section 1a, and may be arranged at any position of the contracted pipe section 1a, as long as it is ensured that the first connection holes 1b and the second connection holes 1c can be correspondingly connected with the locking bolts 2b through the locking nuts 2a, and here, there is no limitation.

[ example 7 ]

As shown in fig. 7, the embodiment 7 has substantially the same structure as the embodiment 6, and the embodiment 7 is different from the embodiment 6 in that a lock nut 2a of the embodiment 4 is riveted to an inner surface of a ferrule section 1 a.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A main beam, comprising: the main beam is annular, and the length L1 of the arc-shaped plate on the cross section is more than or equal to 76% of the circumference L2 of the main beam on the cross section.

2. The main beam of claim 1, wherein: the arc-shaped plate is in an arc shape or an elliptical arc shape.

3. The main beam of claim 1, wherein: the flat plate comprises a main plate and two side plates located on two sides of the main plate, two side ends of the main plate are respectively connected with the two side plates, the two side plates are perpendicular to the main plate, two free ends of the arc-shaped plate are respectively connected with the two side plates correspondingly, and the length of the main plate on the cross section is smaller than the maximum chord length of the arc-shaped plate on the cross section.

4. A girder is characterized by comprising a flat plate and an arc-shaped plate, wherein the flat plate comprises a main plate and two side plates positioned on two sides of the main plate, two side ends of the main plate are respectively connected with the two side plates, the two side plates are perpendicular to the main plate, the arc-shaped plate is positioned on one opposite side of the flat plate, and two free ends of the arc-shaped plate are respectively correspondingly connected with the two side plates, so that the girder is a circumferentially closed tubular product; the main beam is provided with a rotating center, an included angle A is formed between two free ends of the arc-shaped plate and two connecting lines of the rotating center, wherein A is more than or equal to 120 degrees and less than or equal to 180 degrees.

5. The main beam of claim 4, wherein: the length of the main plate in the cross section is equal to the maximum chord length of the arc-shaped plate in the cross section.

6. A photovoltaic tracking support, comprising the main beam of any one of claims 1-5, further comprising:

a column;

a bearing housing, the bearing housing comprising: from last race ring, Z type backup pad and the bottom plate that connects gradually extremely down, Z type backup pad is the Z type in the ascending section shape of horizontal direction, the girder install in the race ring, just the flat board of girder is just to photovoltaic module, the bottom plate is connected with the stand.

7. The photovoltaic tracking rack of claim 6, further comprising:

the stand footstock, the stand footstock includes first connecting plate, the both ends of first connecting plate all extend towards the stand and obtain the second connecting plate, the second connecting plate is connected with the stand, be equipped with first level (l) ing waist hole on the first connecting plate, the bottom plate corresponds first level (l) ing waist hole department is equipped with second level (l) ing waist hole, first level (l) ing waist hole passes through bolt locking with second level (l) ing waist hole, the major axis in first level (l) ing waist hole just with the major axis mutually perpendicular in second level (l) ing waist hole the major axis in first level (l) ing waist hole is on a parallel with the extending direction of girder or the major axis perpendicular to in first level (l) ing waist hole the extending direction of girder.

8. The photovoltaic tracking rack of claim 7, wherein:

the number of the first horizontal adjustment waist holes is two, the two first horizontal adjustment waist holes are symmetrical about the center of the first connecting plate, the number of the second horizontal adjustment waist holes is two, and the two second horizontal adjustment waist holes are symmetrical about the center of the bottom plate.

9. The photovoltaic tracking rack of claim 7, wherein:

every all be equipped with vertical regulation waist hole and vertical fixed orifices on the second connecting plate, the stand corresponds the position department of vertical regulation waist hole is equipped with the stand and adjusts the waist hole, the stand corresponds the position department of vertical fixed orifices is equipped with the stand fixed orifices, the major axis of vertical regulation waist hole is mutually perpendicular with the major axis of stand regulation waist hole, the waist hole is adjusted to the stand and is passed through bolt-up with vertical regulation waist hole and be connected, the stand fixed orifices passes through bolt-up with vertical fixed orifices and is connected.

10. The photovoltaic tracking rack of claim 6, wherein:

the first end of the main beam is a contracted pipe section, the contracted pipe section is formed by extruding the first end of the main beam, and a locking nut is welded or riveted on the inner surface of the contracted pipe section;

the contracted pipe section of the main beam extends into the second end of the adjacent main beam, and the locking bolt sequentially penetrates through the second end of the adjacent main beam and the contracted pipe section of the main beam and is screwed and fixed with the locking nut at the corresponding position.

11. The photovoltaic tracking rack of claim 10, wherein:

the locking nuts are uniformly arranged on the inner surface of the contraction section of the main beam in a surrounding mode, and the locking nuts and the locking bolts are arranged in a one-to-one correspondence mode.