CN219304731U - Large-span photovoltaic bracket mixed by steel ropes - Google Patents

Abstract

The utility model relates to a cable mixed large-span photovoltaic bracket, which belongs to the field of photovoltaic brackets and comprises upright posts, a cable mixed net rack and an upper bracket; the steel cable mixing net rack is fixed at the upper end of the upright post and comprises at least two transverse steel cable trusses and at least two longitudinal trusses; the transverse steel rope truss comprises transverse truss girders, and the transverse truss girders and the longitudinal truss girders are staggered into a grid structure; at least one steel rope fixed end is fixed on the transverse truss girder; each steel rope fixed end comprises a first steel rope fixed end and a second steel rope fixed end, and the first steel rope fixed end and the second steel rope fixed end are respectively positioned at two ends of the transverse truss girder; a steel rope with pretension is connected between the first steel rope fixing end and the second steel rope fixing end. The steel cable applies prestress to the original transverse truss girder, and when external load acts on the truss girder, the generated stress and the prestress are counteracted, so that the steel cable hybrid truss girder can bear larger load.

Description

Large-span photovoltaic bracket mixed by steel ropes

Technical Field

The utility model relates to the field of photovoltaic supports, in particular to a cable mixed large-span photovoltaic support.

Background

Photovoltaic power stations developed on flat lands are fewer and fewer, and the development environment of the photovoltaic power stations is more and more complex. The development of photovoltaic power stations in the environments of ponds, beaches, sewage treatment plants, artificial ditches and the like requires that the photovoltaic support adopts fewer columns as possible or no columns are arranged, so that the span of the photovoltaic support is larger and far exceeds the span of the original ground photovoltaic support below 5 meters, and the maximum span even needs to exceed 50 meters.

For a large-span photovoltaic support structure, a steel structure can be adopted, and has the advantages of good rigidity, small deformation under the action of wind and snow load, stable work and high cost, and the defects of large steel structure self-weight, large steel structure engineering quantity and high cost along with the increase of the span.

The novel large-span photovoltaic support structure at present adopts a flexible photovoltaic support with a rope structure, and has the advantages of small dead weight, small engineering quantity and relatively low cost. However, as the span is increased, the wind vibration effect is more obvious, the vibration amplitude is larger, resonance can be generated, and hidden crack damage can be caused to the photovoltaic module by vibration.

In addition, the cable of the flexible support generally needs to exert pretension, so that a pull rod and a stand column are required to be arranged at the end part of the flexible support, the load to be born by the pull rod and the stand column is large, and the foundation load of the pull rod and the stand column is also large.

Disclosure of Invention

The utility model provides a cable-mixed large-span photovoltaic bracket, which aims to solve the technical problem of ensuring the strength and rigidity of the photovoltaic bracket under the condition of lightening dead weight.

In order to achieve the above object, the utility model provides a cable-mixed large-span photovoltaic bracket, which comprises upright posts, a cable-mixed net rack and an upper bracket; the steel rope mixed net rack is fixed at the upper end of the upright post and comprises at least two transverse steel rope trusses and at least two longitudinal trusses; the transverse steel rope truss comprises transverse truss girders, and the transverse truss girders and the longitudinal truss girders are staggered to form a grid structure; at least one steel rope fixed end is fixed on the transverse truss girder; each steel rope fixed end comprises a first steel rope fixed end and a second steel rope fixed end, and the first steel rope fixed end and the second steel rope fixed end are respectively positioned at two ends of the transverse truss girder; a steel rope with pretension is connected between the first steel rope fixing end and the second steel rope fixing end.

Further, the upper bracket comprises at least two steel frames, and the steel frames are arranged in parallel; each steel frame comprises at least one upper upright post, and the upper upright posts are vertically fixed at the top ends of the longitudinal trusses; the upper bracket further comprises an inclined beam, the inclined beam is fixed on the upper upright post, and the inclined beam is obliquely arranged relative to the horizontal plane; a diagonal bracing is arranged between the diagonal beam and the upper upright post, and two ends of the diagonal bracing are respectively fixedly connected with the diagonal beam and the upper upright post; the upper support further comprises purlines for installing photovoltaic modules, and the purlines are fixed at the top ends of two adjacent oblique beams.

Further, two steel rope fixing ends are arranged on one side of each transverse truss girder, and the two steel rope fixing ends are arranged in parallel vertically; two steel rope fixing ends are symmetrically arranged on the other side of each transverse truss girder; two steel ropes at one side of each transverse truss girder are respectively marked as a concave steel rope and an upper arch steel rope, and two ends of the concave steel rope are positioned above two ends of the upper arch steel rope; a plurality of redirection pulleys are fixed on the transverse truss girder, and the middle positions of the concave steel cable and the upper arch steel cable are in contact with the redirection pulleys; the height of the middle part of the concave steel cable is lower than the height of the two ends of the concave steel cable; the middle part of the upper arch steel cable is higher than the two ends of the upper arch steel cable; the upper arch steel rope and the lower concave steel rope form an arch shape and a concave shape by means of the bend pulleys.

The concave steel rope is pre-tensioned to provide upward supporting force for the transverse truss girder at the position of the redirecting pulley, and when the transverse steel rope truss is subjected to downward load, the upward supporting force can be counteracted with partial external load. The upper arch wire rope provides downward pressure to the transverse truss girder by pre-tensioning. When the transverse steel rope truss is under the action of wind suction load, the downward pressure and the wind suction action are partially counteracted. The upper arch and lower arch and concave steel cables together provide prestress to the transverse truss girder, thereby reinforcing rigidity thereof.

Further, the concave steel cable and the upper arch steel cable are respectively provided with a steel cable tension adjusting device for adjusting tension.

The steel cable tension adjusting device changes the pretension force of the steel cable, applies prestress to the original transverse truss girder, and when external load acts on the truss girder, the generated stress and the prestress counteract each other, so that the steel cable hybrid truss girder can bear larger load.

Further, the top end of the upright post is also provided with a steel structure support, and the upright post is in sliding connection with the steel cable mixing net rack through the steel structure support.

When the steel cable mixing net frame is acted by earthquake, temperature, wind or snow load, the steel structure support can adapt to the displacement between the steel cable mixing net frame and the upright post.

Further, the transverse truss girder is any one of a plane truss, a triangular cross-section truss or a quadrangular cross-section truss.

Different types of cross sections can be adopted according to different load sizes and rigidity requirements.

Advantageous effects

The transverse truss girder of the bracket is fixedly provided with the steel cable fixing end, the steel cable fixing end is connected with the steel cable, the steel cable is provided with pretension, the pretension of the steel cable is utilized to apply prestress to the transverse truss girder, and when external load acts on the transverse truss girder, the generated stress and the prestress counteract each other, so that the steel cable hybrid truss girder can bear larger load. The pretension force of the steel cable is the stress applied by the transverse truss girder and is the internal stress, so that the tension rod and the upright post are not needed, and the load problem of the tension rod and the upright post is not worried.

Compared with a steel structure adopted purely, the steel cable hybrid truss girder has the advantage that the weight is greatly reduced. Compared with a flexible photovoltaic bracket adopting a rope structure, the rigidity is enhanced.

When the whole cable hybrid photovoltaic support is subjected to gravity, earthquake, wind, snow and temperature loads, the loads are transferred to the transverse cable truss through the upper support and the longitudinal truss, and the internal stress of the transverse cable truss can offset a part of the loads.

Drawings

FIG. 1 is a schematic structural view of an arrangement in which the span direction of the transverse wire trusses is consistent with the orientation of the photovoltaic modules;

FIG. 2 is a schematic structural view of an arrangement in which the span direction of the transverse wire trusses is perpendicular to the photovoltaic module orientation;

FIG. 3 is a schematic view of the arrangement of the transverse wire trusses in a span direction at an angle to the orientation of the photovoltaic modules;

FIG. 4 is a schematic diagram of a rope hybrid grid structure;

FIG. 5 is a schematic view of a transverse wire truss structure;

FIG. 6 is a schematic view of a triangular cross-section transverse wire truss structure;

FIG. 7 is a schematic view of a transverse wire truss structure of quadrilateral cross section;

FIG. 8 is a schematic view of the structure of the front and rear double column upper brackets;

fig. 9 is a schematic view of the upper bracket structure of the single column.

Reference numerals:

1. upright post, 2, steel structure support,

3. A steel rope mixed net rack,

31. Transverse steel girder, 311. Transverse truss girder,

312. A bend pulley,

313. Steel cable, 3131, concave steel cable, 3132, upward arch steel cable, 3133, steel cable tension regulator,

314. A first steel cable fixed end,

32. Longitudinal truss,

4. An upper bracket,

41. Upper upright post, 42, diagonal beam, 43, diagonal brace, 44, purlin,

5. A photovoltaic module.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, 2 and 3, a cable-mixed large-span photovoltaic support comprises a plurality of upright posts 1, a steel structure support 2, a cable-mixed net frame 3, an upper support 4 and a photovoltaic module 5.

The upright 1 is a reinforced concrete column or a steel structure column and is used for supporting the weight and other loads of all components on the upright, and the bottom end of the upright 1 is fixed on a foundation.

The bottom ends of the steel structure supports 2 are fixed to the upper end surfaces of the corresponding upright posts 1; the steel cable mixing net frame 3 is arranged above the steel structure support 2, and the surface wall at the lower end of the steel cable mixing net frame 3 is fixed with the surface wall at the upper end of the steel structure support 2. The steel structure support 2 can generate certain relative displacement in the horizontal direction, and when the steel rope mixing net frame 3 is acted by earthquake, temperature, wind or snow load, the steel structure support 2 can adapt to the displacement between the steel rope mixing net frame 3 and the upright post 1.

Referring to fig. 4 and 5, the wire rope hybrid net frame 3 includes a plurality of transverse wire girder frames 31 and a plurality of longitudinal girder frames 32, and a net frame structure formed by interlacing the plurality of transverse wire girder frames 31 and the plurality of longitudinal girder frames 32.

Referring to fig. 5, 6 and 7, the transverse wire truss 31 includes a transverse truss girder 311, and the transverse truss girder 311 may have different types of cross sections according to different load sizes and rigidity requirements, such as a planar truss shown in fig. 5, a truss having a triangular cross section shown in fig. 6, and a truss having a quadrangular cross section shown in fig. 7. The transverse wire trusses 31 are used to achieve a large distance span.

Referring to fig. 5, the transverse girder 31 further includes a diverting pulley 312, a rope 313, and a rope fixing end. The diverting pulleys 312, the steel ropes 313 and the fixed ends of the steel ropes are symmetrically disposed at both sides of the transverse truss girder 311 in the length direction of the longitudinal truss 32. The fixed end of the steel rope is a steel structure provided on the transverse truss girder 311 for fixing the steel rope 313.

Referring to fig. 5, 6 and 7, specifically, the steel cables 313 are symmetrically disposed on both sides of the transverse truss girder 311 along the length direction of the longitudinal truss girder 32, two on each side, one denoted as a concave steel cable 3131 and one denoted as an up-arch steel cable 3132. Two cable fixing ends are also fixed to the lateral truss girder 311 of the side, each for fixing the concave down cable 3131 and the up-arch cable 3132, respectively. The two steel cable fixing ends are arranged in parallel along the vertical direction.

Each steel cable fixing end comprises a first steel cable fixing end 314 and a second steel cable fixing end when seen from one side of the transverse truss girder 311, the first steel cable fixing end 314 and the second steel cable fixing end are respectively fixed at two ends of the transverse truss girder 311, and two ends of the concave steel cable 3131 are respectively fixedly connected with the first steel cable fixing end 314 and the second steel cable fixing end. Similarly, the two ends of the upper arch wire 3132 are fixedly connected to the other first wire fixing end 314 and the second wire fixing end, respectively.

The first wire rope fixing end 314 and the second wire rope fixing end at both ends of the concave wire rope 3131 are respectively positioned at the upper ends of the first wire rope fixing end 314 and the second wire rope fixing end of the upper arch wire rope 3132.

Referring to fig. 5, two sets of diverting pulleys 312 are fixed to the transverse truss girder 311, each set of diverting pulleys 312 includes two diverting pulleys 312, the middle position of the concave steel cable 3131 is abutted against one set of diverting pulleys 312, and the diverting pulleys 312 are used for changing the shape of the concave steel cable 3131 or the upper arch steel cable 3132.

Referring to fig. 4 and 5, the shape of the concave steel rope 3131 is an inverted isosceles trapezoid when viewed in the length direction of the longitudinal truss 32, and the height of the middle position of the concave steel rope 3131 is lower than the height of both ends thereof; the upper arch wire 3132 has a height at a middle position thereof higher than that at both ends thereof. The upper arch steel cords 3132 provide downward pressure to the transverse truss beams 311 by pretensioning. When the transverse girder 31 is loaded by the wind suction force, the downward force is partially offset from the wind suction force. The upper arch steel cords 3132 and the lower concave steel cords 3131 together provide prestress to the transverse truss girder 311, thereby reinforcing rigidity thereof. The upper arch wire 3132 and the lower arch wire 3131 are formed in an arch and concave shape by means of the diverting pulley 312.

The concave cable 3131 may be pre-tensioned to provide an upward holding force to the transverse truss girder 311 at the location of the diverting pulley 312, which may counteract a portion of the external load when the transverse cable truss 31 is subjected to a downward load.

The upper arch wire 3132 and the lower arch wire 3131 are each provided with a wire tension adjusting device 3133 for adjusting the pretensioning force of the upper arch wire 3132 and the lower arch wire 3131, respectively. The wire rope tension adjusting device 3133 is a prior art, and the patent with the application number of 2020228471266 and the application date of 2020, 12 months and 1 day has the patent name of a wire rope tension adjusting device, and discloses a specific structure of the wire rope tension adjusting device. And will not be described in detail herein.

In this embodiment, the transverse girder 31 is lighter in weight in a larger span, and mainly uses the pretension force of the steel cable 313 to pre-stress the original transverse girder 311, so that when an external load is applied to the girder, the generated stress and the pre-stress are counteracted, and the steel cable hybrid girder can bear a larger load.

Referring to fig. 8 and 9, the upper brace 4 includes purlins 44 and a truss frame. A truss frame in turn includes upper uprights 41, diagonal girders 42 and diagonal braces 43. The upper upright posts 41 are vertically fixed on the longitudinal truss 32, and each steel frame can have one or two upper upright posts 41, that is, the upper bracket 4 can adopt a single upright post or a front-rear double upright post structure. In the present embodiment, as shown in fig. 8, two upper columns 41 are taken as an example, and the two upper columns 41 are vertically fixed to the top end of the longitudinal truss 32. The oblique beams 42 are fixed above the two upper uprights 41 and are disposed at an inclination angle to the horizontal. One end of the diagonal brace 43 is fixed to the bottom surface of the diagonal beam 42, and the other end is fixed to the bottom of the upper upright 41.

Referring to fig. 8 and 9, a plurality of steel frames are arranged in parallel along the length direction of the transverse truss beams 311, and purlines 44 are fixed on the plurality of transverse truss beams 311 arranged in parallel. In this embodiment, a plurality of upper brackets 4 are provided, and a photovoltaic module 5 is fixed to each upper bracket 4. The photovoltaic module 5 is the prior art, and the uppermost layer of the photovoltaic module is a low-iron high-permeability toughened glass plate, has two functions, namely, the first function of enabling light to penetrate through and irradiate the battery piece and the second function of fixing and supporting the solar battery piece. The middle layer of the component consists of a polymer EVA (ethylene-vinyl acetate copolymer) and a solar cell, wherein the EVA polymer wraps the solar cell and plays roles in fixing and protecting the solar cell. The lowest layer of the component consists of an alloy composite film which is ageing resistant, corrosion resistant and has good electrical insulation property.

In this embodiment, the upper upright 41, the diagonal beam 42, the diagonal brace 43, and the purlin 44 are hot rolled or cold rolled steel sections.

The photovoltaic module 5 is secured over the purlin 44. In order to enable the photovoltaic module to generate more power, for the northern hemisphere, the photovoltaic module is generally arranged in a south direction or close to the south direction and forms a certain included angle with the horizontal plane. Specifically, fig. 1 shows an arrangement in which the span direction of the transverse wire truss 31 is aligned with the photovoltaic module orientation. Fig. 2 shows an arrangement in which the span direction of the transverse wire truss 31 is perpendicular to the photovoltaic module orientation. Fig. 3 shows an arrangement in which the span direction of the transverse girder 31 forms an angle with the photovoltaic module.

If necessary, the span direction of the transverse wire truss 31 of the wire mixing rack 3 is perpendicular to the direction of the canal when crossing a continuous area such as the canal or road surface. The pretensioning of the concave-down cables 3131 and the up-arch cables 3132 is accomplished by the cable tension adjusting means 3133 of the cables 313 before the upper bracket 4 and the photovoltaic module 5 are installed, thereby forming a certain internal stress inside the transverse cable truss 31. When the whole cable hybrid photovoltaic support is subjected to gravity, earthquake, wind, snow and temperature loads, the loads are transferred to the transverse cable truss 31 through the upper support 2 and the longitudinal truss 32, the internal stress of the transverse cable truss 31 can offset a part of the loads, and when the loads are larger, the cable can provide a certain support for the transverse cable truss 31 through the position of the redirecting pulley 312, so that the deformation of the transverse cable truss 31 when the span is larger is reduced.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (6)

1. The utility model provides a cable wire mixed large-span photovoltaic support which characterized in that: comprises an upright post (1), a steel rope mixing net rack (3) and an upper bracket (4);

the steel cable mixing net frame (3) is fixed at the upper end of the upright post (1), and the steel cable mixing net frame (3) comprises at least two transverse steel cable trusses (31) and at least two longitudinal trusses (32);

the transverse steel rope truss (31) comprises transverse truss girders (311), and the transverse truss girders (311) and the longitudinal truss girders (32) are staggered into a grid structure;

at least one steel rope fixed end is fixed on the transverse truss girder (311); each steel rope fixed end comprises a first steel rope fixed end (314) and a second steel rope fixed end, and the first steel rope fixed end (314) and the second steel rope fixed end are respectively positioned at two ends of the transverse truss girder (311); a pretensioned wire rope (313) is connected between the first wire rope fixing end (314) and the second wire rope fixing end.

2. A cable hybrid large span photovoltaic bracket according to claim 1, wherein: the upper support (4) comprises at least two steel frames, and the steel frames are arranged in parallel;

each steel frame comprises at least one upper upright post (41), and the upper upright posts (41) are vertically fixed at the top ends of the longitudinal trusses (32); the upper bracket (4) further comprises an inclined beam (42), the inclined beam (42) is fixed on the upper upright post (41), and the inclined beam (42) is obliquely arranged relative to the horizontal plane; a diagonal brace (43) is arranged between the diagonal beam (42) and the upper upright post (41), and two ends of the diagonal brace (43) are fixedly connected with the diagonal beam (42) and the upper upright post (41) respectively;

the upper support (4) further comprises purlines (44) for installing photovoltaic modules, and the purlines (44) are fixed at the top ends of two adjacent oblique beams (42).

3. A cable hybrid large span photovoltaic bracket according to claim 1, wherein: two steel rope fixing ends are arranged on one side of each transverse truss girder (311) and are arranged in parallel vertically; two steel rope fixing ends are symmetrically arranged on the other side of each transverse truss girder (311);

two steel ropes on one side of each transverse truss girder (311) are respectively marked as a concave steel rope (3131) and an upper arch steel rope (3132), and two ends of the concave steel rope (3131) are positioned above two ends of the upper arch steel rope (3132);

a plurality of redirection pulleys (312) are fixed on the transverse truss girder (311), and the middle positions of the concave steel cable (3131) and the upper arch steel cable (3132) are abutted against the redirection pulleys (312); the height of the middle position of the concave steel cable (3131) is lower than the height of the two ends of the concave steel cable; the height of the middle position of the upper arch steel cable (3132) is higher than the height of the two ends of the upper arch steel cable; the upper arch wire (3132) and the lower arch wire (3131) are arched and concaved by means of the diverting pulley (312).

4. A rope hybrid large span photovoltaic rack as recited in claim 3, wherein: the concave steel cable (3131) and the upper arch steel cable (3132) are respectively provided with a steel cable tension adjusting device (3133) for adjusting tension.

5. A cable hybrid large span photovoltaic bracket according to claim 1, wherein: the top end of the upright post (1) is also provided with a steel structure support (2), and the upright post (1) is in sliding connection with the steel cable mixing net rack (3) through the steel structure support (2).

6. A cable hybrid large span photovoltaic bracket according to claim 1, wherein: the transverse truss girder (311) is any one of a plane truss, a triangular cross-section truss or a quadrangular cross-section truss.

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