CN114584046A

CN114584046A - Photovoltaic flexible support

Info

Publication number: CN114584046A
Application number: CN202210356691.3A
Authority: CN
Inventors: 庞亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-06-03

Abstract

The invention belongs to the technical field of photovoltaic supports, and particularly relates to a photovoltaic flexible support, which comprises: 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 end upright columns and the middle upright column; the cable truss mechanism comprises an installation cable, a stabilizing cable and a supporting cable piece, wherein the supporting cable piece comprises a first arch cable, a second arch cable and a connecting rod which are arranged below the installation cable, the first arch cable and the second arch cable are both in a wave shape, and the first arch cable is intersected with the second arch cable; the mounting cable and the stabilizing cable are flexible inhaul cables; a plurality of purlins are laid on the mounting cables of every two adjacent rows of cable truss mechanisms; the end upright post is provided with an inclined pull connected at an external fixing position. This kind of flexible support of photovoltaic has can promote the cable load to promote the effect of photovoltaic stability.

Description

Photovoltaic flexible support

Technical Field

The invention belongs to the technical field of photovoltaic supports, and particularly relates to a photovoltaic flexible 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 material includes aluminum alloy, carbon steel and stainless steel.

The materials of the related products of the solar support system are carbon steel and stainless steel, the surface of the carbon steel is subjected to hot galvanizing treatment, and the solar support system does 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; applying 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.

In view of the above-mentioned drawback 1, the prior art also attempts to improve the structure, wherein the more common way is to add an arched cable, thereby improving the vertical rigidity and the bearing capacity of the structure, for example, the patent with publication number CN 209709990U. However, the arch-shaped inhaul cable is at the position where two adjacent spans are connected, namely at the position of the central upright post, the trend of the arch-shaped inhaul cable is bent in a large angle, and the large-angle bending can greatly influence the strength of the cable body, so that the arch-shaped inhaul cable of the two spans has to be disconnected at the position, the number of joints and anchors is increased, the anchor cost is high in the cable structure, and the cost is greatly increased.

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 photovoltaic module is damaged due to the fact that a stay cable can be subjected to telescopic deformation under the action of various loads, and simultaneously improves the bearing capacity and the deformation resistance of the structure, so that the purposes of improving the bearing load of the structure and improving the stability of the photovoltaic module are achieved, and a large number of anchors are avoided.

In order to solve the above technical problem, the present invention provides a photovoltaic flexible stent, 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 columns and the middle column;

the cable truss mechanism at least comprises an installation cable and a support cable piece, wherein the support cable piece comprises a first arch cable, a second arch cable and a vertical rod which are arranged below the installation cable, the first arch cable and the second arch cable are both in a wave shape and are intersected, and the first arch cable, the second arch cable and the installation cable are connected through the vertical rod;

the first arch cable, the second arch cable and the mounting cable are flexible inhaul cables;

a pre-tension is applied in the mounting cord.

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

Furthermore, the cable truss mechanism also comprises a stabilizing cable arranged below the supporting cable piece;

the stabilizing cable is a flexible inhaul cable;

applying a pre-tension in the stabilizing cable;

the vertical rod connects the stabilizing cable with the first arch cable, the second arch cable and the mounting cable.

Further, a pre-tension is applied to the first and second arcuate cables.

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

Furthermore, a plurality of purlins are paved on the mounting cables of every two adjacent rows of the cable truss mechanisms.

Further, the wave shape of the first arch-shaped cable and the second arch-shaped cable is periodic and repeats a period including, but not limited to, half, one, two, etc. within the length of each span;

the number of the vertical rods arranged in each wave-shaped period of the first arch-shaped cable and the second arch-shaped cable is a positive integer;

the first arch-shaped cable body and the second arch-shaped cable body extend for uninterrupted multi-span.

Furthermore, the direction of the first arch-shaped cable and the second arch-shaped cable is changed only at the position connected with the vertical rod and the center pillar, and the first arch-shaped cable and the second arch-shaped cable keep straight lines at other positions.

Furthermore, a first magnetic block is arranged at the position, facing the second arched cable, of the first arched cable, and a second magnetic block is arranged at the position, facing the first arched cable, of the second arched cable;

the first magnetic block attracts the second magnetic block.

Furthermore, a positioning block is arranged on the first magnetic block in a protruding mode, and a positioning groove for embedding the positioning block is arranged on the second magnetic block in a recessed mode.

The beneficial effects of the invention are:

1. through having laid the purlin on the installation cable, can lay more photovoltaic module along the purlin, the used stake quantity of the photovoltaic module of equivalent quantity is still less to save material.

2. Due to the fact that the purlines are laid on the installation cables and the photovoltaic modules are laid on the purlines, the photovoltaic modules are not directly connected with the installation cables, namely, the buffer structures are additionally arranged between the installation cables and the photovoltaic modules, and the photovoltaic modules are not prone to damage due to stretching deformation of the installation 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. This patent scheme arch cable shape is approximate cosine function, so at two span arch cable hookups location, the arch cable trend is similar, can use same root cable, need not set up the joint in the junction, can not lead to hookup location intensity moreover to show the reduction.

5. This patent scheme is used for laying photovoltaic module's installation cable and keeps the level, and photovoltaic module top does not have the structure thing, can furthest guarantee the daylighting of photovoltaic module.

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 description of the embodiments or the prior art 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 flexible stent of the present invention;

FIG. 2 is a schematic structural view of the cable truss mechanism of the present invention;

FIG. 3 is a schematic diagram of the construction of a first magnetic block and a second magnetic block of the present invention;

fig. 4 is a schematic diagram of a purlin of the present invention under force.

In the figure:

1. a middle upright post;

2. an end upright; 21. performing inclined pulling;

3. a cable truss mechanism; 31. installing a cable; 32. a stabilizing cable; 33. a support cable member; 331. a first arch wire; 332. a second arch wire;

4. a purlin;

6. a vertical rod;

7. a first magnetic block; 71. positioning a block;

8. a second magnetic block; 81. and (6) positioning a groove.

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.

Example (b):

as shown in fig. 1, a photovoltaic cable truss mount includes: a plurality of center pillar 1, the row is arranged, and this embodiment is two rows, and the both ends of center pillar 1 are provided with end stand 2, and end stand 2 mainly plays the supporting role with center pillar 1, props upper portion mechanism and 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 and 2, a cable truss mechanism 3 is erected on each row of end columns 2 and middle columns 1; the cable truss mechanism 3 comprises at least a mounting cable 31 and a support cable member 33. The supporting cable member 33 includes a first arch cable 331, a second arch cable 332 and a vertical rod 6 which are arranged below the mounting cable 31, wherein the first arch cable 331 and the second arch cable 332 are both wave-shaped, and the first arch cable 331 and the second arch cable 332 intersect. Depending on the specific engineering parameters, stabilizing wires 32 may be provided in the cable-truss mechanism 3 if the lateral stability of the cable-truss mechanism 3 is not sufficient. The stabilizing cable 32 is mounted below the support cable member 33. The vertical rod 6 connects the first arch cable 331, the second arch cable 332, the installation cable 31 and the stabilizing cable 32. In this embodiment, the first arched cable 331, the second arched cable 332, the installation cable 31, and the stabilizing cable 32 are flexible cables, and the material includes, but is not limited to, steel strands. Pretension is applied to the mounting cables 31 and the stabilizing cables 32, so that the mounting cables 31 and the stabilizing cables 32 are straightened. According to mechanics theory, an arch wire can only provide stiffness and load bearing in a single direction if there is no pre-tension in the arch wire. In this embodiment, the first arch-shaped cable 331 and the second arch-shaped cable 332 exert a pretension force, so as to further improve the structural rigidity and the bearing capacity, and improve the stability of erecting the photovoltaic module.

As shown in fig. 1 and 2, the first arch-shaped cable 331 and the second arch-shaped cable 332 extend without interruption in cable body span. The technical point of the present embodiment is described in detail below. The flexible inhaul cable is generally made of steel stranded wires. With the current material technology, if the steel strand is bent at a large angle, the strength of the steel strand is greatly weakened. In the prior art, each span of the arch-shaped cable is approximate to a catenary, so that the direction of a cable body at the joint of two spans can generate a turning with a larger angle, and the strength of the cable body is weakened. Thus, the prior art typically breaks the cable body there and connects it through the cable anchorage, which can be a significant waste of material and increase costs. According to the scheme, the arch cable is arranged into a wave shape, so that the direction of the arch cable at the joint of the two spans is basically the same, and the cable body at the joint does not need to be disconnected. The wave shape of the first and second

arcuate cables

331 and 332 is described in more detail as follows: a plane rectangular coordinate system is established in the plane of the cable truss mechanism 3, the length direction of the installation cable 31 is an x axis, the direction perpendicular to the installation cable 31 is a y axis, and the shapes of the first arch cable 331 and the second arch cable 332 respectively approximately meet the curve described by a cosine function formula: y = a × cos (k × x), y = a × cos (k × x +180 °), where A, k is a coefficient. The above-mentioned curve shape is periodic, and the periodic undulating shape of the first and second

arcuate cords

331 and 332 of the present patent scheme repeats a period including, but not limited to, half, one, two, etc. periods within the length of each span. As shown in the drawing, the present embodiment repeats one cycle per span length. The above-mentioned "approximately satisfies" the formula means that the curve described by the formula is approximated by a certain number of broken lines. According to the scheme, the first arch-shaped cable 331 and the second arch-shaped cable 332 are only bent at the vertical rod 6 and the middle upright post 1, and keep straight lines at other places. In the scheme of the patent, the number of the vertical rods 6 arranged in each period length of the first arch-shaped cable 331 and the second arch-shaped cable 332 in the periodic wave undulating shape is a positive integer. This patent scheme is through setting up the montant, changes the crooked direction of arch cable to once the bending replacement of large angle with arch cable is for many times the bending of small angle, thereby avoids buckling the weakening to the cable body intensity as far as possible. The larger the number of the vertical rods 6 in each period, the more the broken line approaches to the curve described by the formula, and the lower the strength weakening of the cable body is. The vertical rod 6 has the functions of connection and support. As shown in the drawings, the number of the vertical bars 6 provided per cycle is seven in the present embodiment. The shape of the arch cable in the patent scheme is obviously different from that of the arch cable in the prior art, and the difference is that the same arch cable in the patent scheme has an upward arched section and a downward concave section, and the arch cable in the patent scheme keeps basically consistent trend at a middle upright post at the joint of two spans; in the prior art, the same arch cable only arches upwards or downwards, and the arch cable generates a larger folding angle at the joint of the two spans. Because the arch cable shape of this patent scheme is approximate cosine function, so at two span arch cable hookup locations, the arch cable trend is approximate the same, can use same root cable, need not set up the joint in the junction, can not lead to hookup location intensity to show the reduction moreover.

As shown in fig. 1 and 4, a plurality of purlins 4 are transversely laid on the installation cables 31 of the two-row cable truss mechanism 3 in this embodiment, so that the photovoltaic modules are not directly connected to the installation cables 31, which is equivalent to that a buffer structure is added between the installation cables and the photovoltaic modules, and thus the photovoltaic modules are less prone to being damaged due to the telescopic deformation of the installation cables.

Due to the fact that the purlines 4 are laid on the installation cables 31, the distance between the two rows of cable trusses 3 is not limited by the size of the photovoltaic modules any more, the distance can be increased, more photovoltaic modules are laid along the purlines 4, the number of piles used by the photovoltaic modules in the same number 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 installation cable 31, so that the distance between the cable truss mechanisms 3 is larger, and the vertical rigidity provided by the cable truss mechanisms 3 in the scheme is far greater than that of a conventional single cable, so that the deformation and torsion angles 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. If the vertical rigidity of a single inhaul cable in the prior art is k, the vertical load is f, and the wind torque isThe moment is m, the distance between the two guys is d, and the chord length of the wind receiving area formed by the 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 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 laying components per span is a times of that of the prior art scheme, and a>1. Therefore, the chord length of the wind receiving area formed by the components is a x l, and the vertical load is a x f. According to the aerodynamic knowledge, the chord length is changed into a times, and the wind torsion moment is changed into a²Multiple, 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. Distance is a d between two cables 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, therefore 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 solution β = a²*m/((a*d)²B k). The comparison found β = α/b. According to the derivation, compared with the prior art, the deformation of the wind-driven generator under vertical load is reduced by b/a times, and the rotation angle of the wind-driven generator under 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. 3, the first magnetic block 7 is disposed on the first arched cable 331 facing the second arched cable 332, and the second magnetic block 8 is disposed on the second arched cable 332 facing the first arched cable 331; the first magnetic block 7 attracts the second magnetic block 8. Wherein, the first magnetic block 7 is protruded with a positioning block 71, and the second magnetic block 8 is recessed with a positioning slot 81 for embedding the positioning block 71. The first magnetic block 7 attracts the second magnetic block 8, so that the first arch wire 331 and the second arch wire 332 can be better connected together, and the connection position of the first arch wire 331 and the second arch wire 332 can be fixed by inserting the positioning block 71 into the positioning groove 81.

In summary, the following steps: through having laid purlin 4 on installation cable 31, can lay more photovoltaic module along purlin 4, the used stake quantity of the photovoltaic module of equivalent quantity is still less to save material. Due to the fact that the purlines 4 are laid on the installation cables 31 and the photovoltaic modules are laid on the purlines 4, the photovoltaic modules are not directly connected with the installation cables 31, namely, a buffer structure is additionally arranged between the installation cables 31 and the photovoltaic modules, and the photovoltaic modules are not prone to damage due to stretching deformation of the installation cables 31. Because the wave-shaped arch cable adopted by the scheme of the patent enables the trend of the arch cable at the joint of the two spans to be basically consistent, an anchor device is not needed, materials are greatly saved, and the cost is reduced. 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.

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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

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 flexible stent, 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) at least comprises an installation cable (31) and a support cable piece (33), the support cable piece (33) comprises a first arch cable (331), a second arch cable (332) and a vertical rod (6) which are arranged below the installation cable (31), the first arch cable (331) and the second arch cable (332) are both in a wave shape, the first arch cable (331) and the second arch cable (332) are intersected, and the first arch cable (331), the second arch cable (332) and the installation cable (31) are connected through the vertical rod (6);

the first arched cable (331), the second arched cable (332) and the mounting cable (31) are flexible cables;

a pretension is applied in the mounting cord (31).

2. The photovoltaic flexible mount of claim 1,

the end upright post (2) is provided with a diagonal pull (21) connected to an external fixing position.

3. The photovoltaic flexible mount of claim 1,

the cable truss mechanism (3) further comprises a stabilizing cable (32) arranged below the supporting cable piece (33);

the stabilizing cable (32) is a flexible inhaul cable;

-exerting a pretension in the stabilizing wire (32);

the vertical rod (6) connects the stabilizing cable (32) with the first arched cable (331), the second arched cable (332) and the mounting cable (31).

4. The photovoltaic flexible mount of claim 1,

a pretension is applied to the first and second arcuate cables (331, 332).

5. The photovoltaic flexible mount of claim 1,

and the height difference is formed between the two rows of the end columns (2) and the middle columns (1) in the two adjacent rows.

6. The photovoltaic flexible stent of claim 1,

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

7. The photovoltaic flexible mount of claim 1,

the wave shape of the first arcuate cable (331) and the second arcuate cable (332) is periodic and repeats, including but not limited to, half, one, two, etc., cycles within the length of each span;

the number of the vertical rods (6) in each wave-shaped period of the first arched cables (331) and the second arched cables (332) is a positive integer;

the first arch-shaped cable (331) and the second arch-shaped cable (332) extend continuously for multiple spans.

8. The photovoltaic flexible mount of claim 1,

the first arch-shaped cable (331) and the second arch-shaped cable (332) change their directions only at the positions connected to the vertical rod (6) and the center pillar (1), and remain straight at other positions.

9. The photovoltaic flexible mount of claim 1,

a first magnetic block (7) is arranged at the position of the first arched cable (331) facing the second arched cable (332), and a second magnetic block (8) is arranged at the position of the second arched cable (332) facing the first arched cable (331);

the first magnetic block (7) adsorbs a second magnetic block (8).

10. The photovoltaic flexible mount of claim 9,

the first magnetic block (7) is provided with a positioning block (71) in a protruding mode, and the second magnetic block (8) is provided with a positioning groove (81) for the positioning block (71) to be embedded into in a recessed mode.