CN114777342A

CN114777342A - Photovoltaic cable truss support

Info

Publication number: CN114777342A
Application number: CN202210356685.8A
Authority: CN
Inventors: 庞亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-22

Abstract

The invention belongs to the technical field of photovoltaic supports, and particularly relates to a photovoltaic cable truss support, which comprises: the middle upright columns are arranged in rows, and two ends of each row are provided with end upright columns; a cable truss mechanism is erected on the end upright columns and the middle upright columns of each row; the cable truss mechanism comprises an upper chord cable, a lower chord cable and an inclined rod, and the inclined rod is arranged between the upper chord cable and the lower chord cable; the upper chord cable and the lower chord cable are flexible inhaul cables; a plurality of purlins are laid on the upper chord cables of each two rows of cable truss mechanisms; the end upright post is provided with an inclined pull connected at an external fixing position. The photovoltaic cable truss support has the advantages of material saving, strong bearing capacity and strong deformation resistance, thereby achieving the effect of improving the stability of a photovoltaic module.

Description

Photovoltaic cable truss support

Technical Field

The invention belongs to the technical field of photovoltaic supports, and particularly relates to a photovoltaic cable truss support.

Background

A solar photovoltaic bracket is a special bracket designed for placing, installing and fixing a solar panel in a solar photovoltaic power generation system. The general materials include aluminum alloy, carbon steel and stainless steel.

The materials of the products related to the solar support system are carbon steel and stainless steel, the surface of the carbon steel is subjected to hot galvanizing treatment, and the products do not rust after being used outdoors for 30 years. The solar photovoltaic bracket system has the characteristics of no welding, no drilling, 100 percent adjustability and 100 percent reutilization.

The existing typical photovoltaic flexible support comprises: the middle upright columns are arranged in one row or two rows, and end upright columns are arranged at two ends of each middle upright column; each row of the middle upright columns and the end upright columns are provided with cable mechanisms; the cable mechanism at least comprises a stay cable arranged on the end upright post and the middle upright post, and generally comprises a stay cable for connecting the upper end of the end upright post and the ground; exerting pretension in the inhaul cable; photovoltaic module directly lays on the cable. Through adopting the self-balancing prestressing force cable system of optimizing, improved the vertical rigidity of cable to showing the leap ability that improves photovoltaic support, reducing area has stronger adaptability to the complicated region of topography.

The above prior art solutions have the following drawbacks: 1. although the vertical rigidity of the structure can be improved by adopting an optimized self-balancing prestress stay cable system, the vertical rigidity of the stay cable is still small, and the stay cable is easy to deform to a large extent under the action of wind load. 2. The cable can produce flexible deformation under various load effects, and photovoltaic module direct mount can follow the cable and warp together on the cable, leads to photovoltaic module to destroy. 3. The quantity of the upright posts is large, which is not beneficial to saving materials.

Disclosure of Invention

The invention aims to provide a photovoltaic flexible support, which has a simple structure, saves the number of stand columns, solves the technical problem that a stay cable can generate telescopic deformation under the action of various loads to cause damage of a photovoltaic module, and simultaneously improves the bearing capacity and the deformation resistance of the structure, thereby achieving the purposes of improving the bearing load of the structure and improving the stability of the photovoltaic module.

In order to solve the above technical problem, the present invention provides a photovoltaic cable truss support, including:

the middle upright columns are arranged in rows, and end upright columns are arranged at two ends of each middle upright column;

a cable truss mechanism is erected on each row of the end upright columns and the middle upright column;

the cable truss mechanism comprises an upper chord cable, a lower chord cable and an inclined rod, and the inclined rod is arranged between the upper chord cable and the lower chord cable;

the upper chord cable and the lower chord cable are flexible inhaul cables, and pretension force is applied to the inhaul cables;

furthermore, a plurality of purlines are laid on the upper chord cables of every two adjacent rows of the cable truss mechanisms;

furthermore, the end upright post is provided with an inclined pull connected to an external fixing position.

Further, height difference is formed between two adjacent rows of the middle upright columns and the end upright columns.

Furthermore, the inclined rods are connected end to form a plurality of W-shaped waveform supporting frames.

Further, the plurality of W-shaped wave supports are disconnected in the midspan.

Furthermore, a secondary transverse supporting rod is arranged between every two adjacent inclined rods.

Furthermore, the two ends of the secondary transverse supporting rod are provided with buffer blocks, and two sides of each buffer block are provided with elastic adhesive layers.

Furthermore, the lower end of the upper chord cable is provided with a plurality of upper damping mechanisms, and each upper damping mechanism comprises an upper hanging rope arranged on the upper chord cable and an upper damping ball body arranged at the lower end of the upper hanging rope;

the lower end of the lower chord cable is provided with a plurality of lower damping mechanisms, and each lower damping mechanism comprises a lower hanging rope arranged on the lower chord cable and a lower damping ball body arranged at the lower end of the hanging rope.

The beneficial effects of the invention are:

1. by laying the purlines on the upper chord cables, more photovoltaic modules can be laid along the purlines, and the number of piles used by the same number of photovoltaic modules is less, so that the material is saved.

2. Due to the fact that the purlins are laid on the upper chord cables and the photovoltaic modules are laid on the purlins, the photovoltaic modules are not directly connected with the upper chord cables, and accordingly the buffer structure is equivalently arranged between the upper chord cables and the photovoltaic modules, and the photovoltaic modules are not prone to damage due to stretching deformation of the upper chord cables.

3. Because the cable truss structure that this patent scheme adopted, according to engineering mechanics general knowledge, the vertical rigidity that can provide is far greater than general individual layer cable, and because the purlin has been laid at the cable truss structure, makes the interval between the cable truss bigger, receives under the condition of vertical load or wind torsion, warp and the torsion angle all can reduce by a wide margin.

4. Because this patent scheme has exerted pretension in the cable for the structure can not produce stability problem, avoids extravagant material in order to solve stability problem.

5. Through horizontal bracing piece, can play horizontal supporting role to form stable triangle-shaped structure with the down tube, thereby further increase the stability of structure.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a photovoltaic cable truss mount of the present invention;

FIG. 2 is a schematic view of a portion of the construction of the photovoltaic cable truss mount of the present invention;

fig. 3 is a schematic view of a purlin of the present invention under force.

In the figure:

1. a middle upright post;

2. an end post;

3. a cable truss mechanism; 31. a top chord cable; 32. a lower chord cable; 33. a diagonal bar;

4. a purlin;

5. obliquely pulling;

6. secondary transverse supporting rods; 61. a buffer block; 62. an elastic adhesive layer;

7. an upper damping mechanism; 71. hanging a rope; 72. an upper damping sphere;

8. a lower damping mechanism; 81. hanging a rope; 82. a lower damping sphere.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment is as follows:

as shown in fig. 1 to 3, a photovoltaic cable truss mount includes: the plurality of the middle columns 1 are arranged in rows, two rows are taken as an example, the two ends of each middle column 1 are provided with the end columns 2, and the end columns 2 and the middle columns 1 mainly play a supporting role in supporting the upper mechanism and the photovoltaic module. The provision of an appropriate number of center pillars 1 can reduce the span. In this embodiment, the height difference is formed between two rows of the middle columns 1 and the end columns 2 arranged in two rows, so that the laid photovoltaic module can have an inclination angle, and a better positive direction is achieved. An inclined pull 5 is arranged between the upper end of the end upright post 2 and the ground so as to balance the horizontal force applied to the end upright post 2.

As shown in fig. 1, a cable truss mechanism 3 is erected on each row of end columns 2 and middle columns 1; the cable truss mechanism 3 comprises an upper cable 31, a lower cable 32 and an inclined rod 33, wherein the inclined rod 33 is arranged between the upper cable 31 and the lower cable 32. The diagonal rod 33 is arranged above the center pillar 1. In the present embodiment, the upper chord 31 and the lower chord 32 are flexible cables, but not limited to steel strands, and a high pretension force is applied in the steel strands, which can be used for the upper chord 31 and the lower chord 32. When the cable truss mechanism 3 bears the in-plane load, according to the mechanics theory, the analog beam bears the vertical load and generates tensile and compressive stress on the upper surface and the lower surface, and the cable truss mechanism 3 also generates the tensile and compressive stress in the upper chord 31 and the lower chord 32 respectively according to the scheme of the patent. The compression stress may cause stability problems, but as long as the pressure caused by the external load in the chord is not greater than the pretension in the steel strand, there is no pressure in the chord, so the cable truss mechanism 3 of the patent scheme does not need to check the lateral stability, does not need to additionally provide a structure for providing out-of-plane stability, only needs two chords and corresponding diagonal rods 33, and the conventional steel truss structure needs at least 3 chord rods to form a stable structure. The structure has been simplified greatly to the used cable truss of this patent scheme. Furthermore, because the stress on the inclined rod 33 of the cable truss close to the midspan is lower, the inclined rod 33 is disconnected in the midspan, the material is saved, the structure is simplified, and the performance index is not influenced.

As shown in fig. 1 and 3, in the present embodiment, the diagonal rods 33 are connected end to form a plurality of W-shaped wave-shaped support frames.

Meanwhile, a plurality of purlins 4 are paved on the upper chord cable 31, so that the photovoltaic module is not directly connected with the upper chord cable 31, which is equivalent to that a buffer structure is additionally arranged between the upper chord cable and the photovoltaic module, and the photovoltaic module is not easily damaged due to the telescopic deformation of the upper chord cable.

Due to the fact that the purlines 4 are laid on the upper chord 31, the distance between the two pull cables 32 is not limited by the size of the photovoltaic module any more, the distance can be increased, more photovoltaic modules are laid along the purlines 4, the number of piles used by the same number of photovoltaic modules is less, and therefore the number of the middle columns 1 and the number of the end columns 2 are saved, and materials are saved.

Generally, the photovoltaic modules are arranged at an inclination angle for facing the sunlight. When the inclined flat plate structure faces the wind, the structure is equivalent to a typical flat plate airfoil. The aerodynamic field refers to the angle of attack. The wind load on the wing profile is not only the force passing through the section centroid, but also the moment around the centroid, namely the wind torque. A plurality of purlins 4 are laid on the upper chord 31, so that the distance between the cable trusses is larger, and the vertical rigidity provided by the cable truss mechanism 3 used in the patent scheme is far greater than that of a conventional single cable, so that the deformation and torsion angle are much smaller under the condition of vertical load or wind torsion. The following was demonstrated: the following comparison was made. It is assumed that the vertical stiffness provided by the conventional single cable of the prior art and the cable-truss mechanism 3 of the present patent solution is linear. In the prior art, the vertical rigidity of a single inhaul cable is k, the vertical load is f, the wind torque moment is m, the distance between two inhaul cables is d, and the chord length of a wind receiving area formed by photovoltaic modules is l (the chord length is a professional term of aerodynamics, and the width of the wind receiving area of the modules in the air flowing direction is referred to in the patent). The span of the patent scheme is assumed to be the same as that of the prior art scheme, the number of the laid components per span is a times of that of the prior art scheme, and a>1. Therefore, the wind-receiving area formed by the components has a chord length a x l and a vertical load a x f. According to the aerodynamic knowledge, the chord length becomes a times, and the wind torque momentIs changed into a²Multiple, i.e. a²M. If the single-row cable truss mechanism 3 in the patent scheme provides vertical rigidity b x k, the rigidity of the cable truss mechanism 3 is far greater than that of a horizontal cable, so that b>>a>1. The distance is a d between two cable of this patent scheme. According to the mechanics theory, the vertical deformation D1= f/(2 ×) of the prior art, the vertical deformation D2= a ×/(2 × b ×) of the present patent, D2= (a/b) × D1, because b is>>a, so D2<<D1. Under a small angle, the torsion angle of the prior art scheme is alpha = m/(d)²K), the torsion angle of the present patent scheme β = a²*m/((a*d)²B k). The comparison found that β = α/b. According to the derivation, compared with the prior art, the deformation of the wind power generator under the vertical load is reduced by b/a times, the rotation angle of the wind power generator under the wind torque is reduced by b times, and b times>>a>1, both this patent scheme can effectively reduce the support and warp the torsion angle under the wind torsion under vertical load. The derivation process above assumes that the vertical rigidity of the single cable in the prior art and the cable truss mechanism 3 in the patent scheme are both linear, the torsion angle is linear solution, and the actual two have nonlinear effects, but do not affect the qualitative analysis.

As shown in fig. 1 and 2, a secondary transverse support bar 6 is arranged between adjacent diagonal bars 33, and a stable triangular structure is formed between the secondary transverse support bar and the adjacent diagonal bars 33. Meanwhile, in order to reduce the damage of the secondary transverse supporting rod 6 caused by the deformation of the inclined rod 33, the two ends of the secondary transverse supporting rod 6 are provided with the buffer blocks 61, the two sides of the buffer blocks 61 are provided with the elastic adhesive layers 62, and when the inclined rod 33 deforms, the buffer blocks 61 can keep the stable triangular structure formed between the secondary transverse supporting rod 6 and the inclined rod 33 through the deformation of the buffer blocks 61.

As shown in fig. 1 and 2, the lower end of the upper chord 31 is provided with a plurality of upper damping mechanisms 7, and each upper damping mechanism 7 comprises an upper sling 71 arranged on the upper chord 31 and an upper damping sphere 72 arranged at the lower end of the sling; the lower end of the lower chord 32 is provided with a plurality of lower damping mechanisms 8, and each lower damping mechanism 8 comprises a lower hanging rope 81 arranged on the lower chord 32 and a lower damping ball 82 arranged at the lower end of the hanging rope. Through the upper damping ball 72 on the upper hanging rope 71, when the upper chord 31 vibrates or swings due to external force, the upper damping ball 72 swings therewith, and because the swinging directions of the upper damping ball 72 and the lower damping ball 82 are respectively opposite to the swinging direction of the chord, the upper damping ball 72 and the lower damping ball 82 generate a force opposite to the swinging, so that the swinging amplitudes of the upper chord 31 and the lower chord 32 are resolved, the swinging influence of wind on the chord is counteracted, and the swinging of the upper chord 31 and the lower chord 32 is reduced.

In summary, the following steps: by laying the purlins 4 on the upper chord 31, more photovoltaic modules can be laid along the purlins 4, and the number of piles used by the same number of photovoltaic modules is less, so that materials are saved. Due to the fact that the purlines 4 are laid on the upper chord cables 31 and the photovoltaic modules are laid on the purlines 4, the photovoltaic modules are not directly connected with the upper chord cables 31, the effect that a buffer structure is additionally arranged between the upper chord cables 31 and the photovoltaic modules is equivalent to the effect that the photovoltaic modules are not easily damaged due to the telescopic deformation of the upper chord cables 31. Due to the pretension applied in the upper chord 31 and the lower chord 32, the structure is free from stability risks and no material is wasted for stability problems. Because the cable truss mechanism 3 that this patent scheme adopted, according to engineering mechanics general knowledge, the vertical rigidity that can provide is far greater than horizontal cable, and because laid purlin 4 on cable truss mechanism 3, makes the interval between cable truss mechanism 3 bigger, receives under the condition of vertical load or wind torsion, warp and the torsion angle all can reduce by a wide margin. The transverse support rod 6 can play a role of transverse support, and forms a stable triangular structure with the inclined rod 33, thereby further increasing the stability of the inclined rod 33.

All the components selected in the application are general standard components or components known by those skilled in the art, and the structure and the principle of the components can be known by technical manuals or by routine experiments.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Those of ordinary skill in the art will appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A photovoltaic cable truss mount, comprising:

the middle upright columns (1) are arranged in rows, and end upright columns (2) are arranged at two ends of each middle upright column (1);

a cable truss mechanism (3) is erected on each row of the end columns (2) and the middle column (1);

the cable truss mechanism (3) comprises an upper chord cable (31), a lower chord cable (32) and an inclined rod (33), wherein the inclined rod (33) is arranged between the upper chord cable (31) and the lower chord cable (32);

the upper chord (31) and the lower chord (32) are flexible inhaul cables, and pretension force is applied to the inhaul cables.

2. The photovoltaic cable truss mount of claim 1,

and a plurality of purlines (4) are paved on the upper chord cables (31) of every two adjacent rows of the cable truss mechanisms (3).

3. The photovoltaic cable truss mount of claim 1,

the end upright post (2) is provided with a diagonal pull (5) connected to an external fixing part.

4. The photovoltaic flexible stent of claim 1,

the end columns (2) and the middle columns (1) arranged in rows form a height difference between two adjacent rows.

5. The photovoltaic cable truss mount of claim 1,

the inclined rods (33) are connected end to form a plurality of W-shaped waveform supporting frames.

6. The photovoltaic cable truss mount of claim 5 wherein,

the plurality of W-shaped wave supports are disconnected in the midspan.

7. The photovoltaic cable truss mount of claim 6,

and a secondary transverse supporting rod (6) is arranged between the adjacent inclined rods (33).

8. The photovoltaic cable truss mount of claim 7,

two ends of the secondary transverse supporting rod (6) are provided with buffer blocks (61), and two sides of each buffer block (61) are provided with elastic adhesive layers (62).

9. The photovoltaic cable truss mount of claim 1,

the lower end of the upper chord (31) is provided with a plurality of upper damping mechanisms (7), and each upper damping mechanism (7) comprises an upper hanging rope (71) arranged on the upper chord (31) and an upper damping sphere (72) arranged at the lower end of the hanging rope;

the lower end of the lower chord rope (32) is provided with a plurality of lower damping mechanisms (8), and each lower damping mechanism (8) comprises a lower hanging rope (81) arranged on the lower chord rope (32) and a lower damping ball body (82) arranged at the lower end of the hanging rope.