CN223553255U - A flexible photovoltaic support based on composite materials - Google Patents

Abstract

This utility model belongs to the field of photovoltaic power generation technology and relates to a flexible photovoltaic support structure. A flexible photovoltaic support structure based on composite materials includes a support base structure and a flexible cable structure; both ends of the flexible cable structure are fixed to the support base structure; the flexible cable structure consists of flexible cables and flexible conversion connectors. The flexible cable includes three sections: the middle section is a load-bearing cable, and the two end sections are anchor cables. The load-bearing cable and the anchor cables are connected by flexible conversion connectors. This utility model utilizes the corrosion resistance, insulation, lightweight and high strength characteristics of materials such as FRP to improve the service life of the support structure. It has strong adaptability to complex environments, such as uneven sites, slopes, tidal flats, high-pressure environments, saline-alkali land, and areas subject to acid rain corrosion.

Description

Flexible photovoltaic bracket based on composite material

Technical Field

The utility model belongs to the technical field of photovoltaic power generation, and relates to a flexible photovoltaic bracket.

Background

In recent years, the application of the photovoltaic power generation field is wide, and the photovoltaic power generation field is one of clean energy sources with the greatest development speed and potential in the current energy structure. However, the large-scale photovoltaic power station has the characteristic of wide occupied area, is scarce in land resources, and the topography meeting the power station construction standard gradually tends to be saturated, many places such as sloping fields, tidal flats, saline-alkali lands and the like with poor relief conditions are limited by the traditional fixed photovoltaic support and are not fully utilized, since 2021, the flexible photovoltaic support gradually appears in the public view, and has wide application prospects in view of the uniqueness of the structure, large spanning capacity, less material use, good economy and wide application scenes, and is similar to sewage treatment plants, agricultural light complementation, fishing light complementation, mountain area photovoltaic, parking lot photovoltaic and the like, and the flexible photovoltaic support has wide development prospects on the premise of national advocating the light guide complementation and agricultural light complementation. In order to be suitable for more special erection environments, the development of a flexible photovoltaic bracket based on a composite material is one of effective ways.

At present, the service life of the traditional flexible photovoltaic bracket is obviously short (1) the service life of the photovoltaic module is 25 years, and the flexible photovoltaic bracket also needs to realize the service life of more than 25 years in the period so as to maximize the power generation capacity of the whole power generation module. However, most of the flexible photovoltaic brackets are made of materials such as profile steel, aluminum alloy and steel strands, and because the power station is installed outdoors, if the power station encounters acidic rainwater and saline-alkali soil environment, compared with a composite material (FRP), the iron-containing material is more prone to rust, so that the service life of the brackets is influenced, and (2) most of the traditional flexible photovoltaic brackets are made of alloy materials, the structure has the possibility of conducting electricity. To ensure the safety of the staff, the conventional flexible photovoltaic support is not suitable for an environment where high voltage may be generated. (3) The traditional flexible photovoltaic bracket, the initial transverse tension generated by the prestressed flexible inhaul cable can enable the end part of the vertical upright post of the large-span flexible photovoltaic bracket to generate larger bending moment, which is not beneficial to the overall stability of the structure, and the axial compressive capacity of the upright post is not fully utilized.

Therefore, how to quickly and efficiently build a flexible photovoltaic bracket with large span and long service time in a special environment is a key technical problem meeting the actual requirements and to be solved urgently.

Disclosure of utility model

The utility model provides a flexible photovoltaic bracket based on a composite material, which aims to solve the defects of the service life of the conventional flexible photovoltaic bracket and has the advantages of strong environmental applicability, convenience in disassembly and assembly, rapidness in construction, strong corrosion resistance, good insulativity and the like. The structure is suitable for special environments such as uneven fields, sloping fields, beach areas, high-voltage areas, acid rain areas, saline-alkali lands and the like, and can build a flexible photovoltaic bracket with large span and long service time in a short time.

The flexible photovoltaic bracket based on the composite material comprises a bracket basic structure and a flexible cable structure, wherein two ends of the flexible cable structure are fixed on the bracket basic structure, the flexible cable structure comprises flexible cables and flexible conversion connecting pieces, the flexible cable comprises three sections, the middle section is a carrier cable made of the composite material with high elastic modulus, the two end sections are anchor cables made of the woven composite material, and the carrier cable is connected with the anchor cables through the flexible conversion connecting pieces.

The support foundation structure comprises a strip foundation, inclined upright posts, cable saddles, transverse supports and support connecting pieces, wherein a plurality of parallel inclined upright posts are arranged on the strip foundation, the adjacent inclined upright posts are provided with height differences and are arranged at intervals, the lower ends of the inclined upright posts are connected with the strip foundation, the cable saddles are arranged at the upper ends of the inclined upright posts, the adjacent inclined upright posts are connected with each other through the transverse supports and the hoops, the inclined upright posts at the two ends of the strip foundation are connected with the transverse supports through the upright post supports, and the lower ends of the upright post supports are fixed with the strip foundation through the support connecting pieces.

Preferably, the inclined upright post is composed of an FRP sleeve and concrete in the FRP sleeve, and an included angle of 45 degrees is formed between the inclined upright post and the strip-shaped foundation.

The flexible conversion connecting piece is characterized in that one end of the flexible conversion connecting piece is provided with a carrier cable anchoring device, the other end of the flexible conversion connecting piece is provided with a cable anchoring device, the carrier cable anchoring device is composed of a variable-section sleeve and filled with modified resin, the modified resin is used for anchoring a carrier cable, the cable anchoring device comprises a connecting sleeve, a flange plate and an anchoring clamping piece, the flange plate is used as an anchor ring and is combined with the anchoring clamping piece to anchor a cable, and the carrier cable anchoring device is connected with the cable anchoring device through bolts.

Preferably, the carrier cable is made of any one of glass fiber reinforced plastic, basalt fiber reinforced resin and carbon fiber reinforced matrix composite material and is used for installing the photovoltaic module.

Preferably, the anchoring stay rope is made of any one of aramid fiber, glass fiber reinforced nylon and ultra-high molecular weight polyethylene composite material through a braiding process.

The cable saddle comprises a cable saddle bottom plate, triangular rib plates and cable saddle pulley parts, wherein the cable saddle pulley parts comprise arc clamping plates and pulley devices, and the cable saddle bottom plate is fixed with the top of the inclined upright post by bolts.

The wind-resistant support is arranged between the adjacent carrier ropes, and comprises a support diagonal, a support upper chord and a support connecting piece, wherein the support diagonal and the support upper chord are connected with the support connecting piece through bolts, and the support connecting piece comprises a support connecting clamping plate and a support connecting lug plate.

Preferably, the free end of the anchoring stay is wound around a saddle at the upper end of the inclined upright post and is fixed on the strip-shaped foundation through the anchoring device.

The beneficial effects of the utility model are as follows:

(1) The utility model relates to a flexible photovoltaic bracket based on a composite material, wherein the outer sleeve of an inclined upright post and the middle section of a flexible inhaul cable adopt the composite material such as CFRP/BFRP/GFRP, and the composite material has the characteristics of wide application range, convenient transportation, good corrosion resistance, good insulativity and the like, is suitable for non-flat fields, sloping fields, mud flat, high-pressure environments, saline-alkali soil, acid rain environments and the like, and can greatly prolong the service life of the flexible photovoltaic bracket.

(2) The inclined upright post adopts a commonly used round post, but the round post is changed from the traditional vertical installation into the traditional inclined installation at 45 degrees, and the inclined angle formed by the inclined upright post and two sides of the anchoring inhaul cable is the same through a cable saddle at the upper end of the inclined upright post, so that the resultant force born by the inclined upright post is along the axial direction of the inclined upright post, and the two purposes are achieved. According to the utility model, the carrier cable bypasses the cable saddle, so that the tensile forces on two sides of the inclined upright post are the same and the included angles are consistent, the resultant force direction is ensured to be along the central axis of the inclined upright post, and the overturning risk of the end part of the upright post is reduced. The bearing cable of the force transmission system can exert larger prestress than the traditional support, so that the in-plane rigidity and span of the photovoltaic support are improved, the axial center of the inclined upright post is pressed, the defect of poor shearing capacity of FRP constraint concrete can be effectively avoided, the stronger compressive bearing capacity of the FRP constraint concrete is fully utilized, and the structure of the model can exert larger prestress on the bearing cable, so that the bearing cable is suitable for large-span terrains with the middle part incapable of using the swinging support.

(3) The wind-resistant support is arranged between the adjacent flexible inhaul cables, so that the overall stability of the structure can be improved, and the FRP material is prevented from bearing excessive load transversely, so that adverse effects are generated.

Drawings

FIG. 1 is a schematic view of the overall effect of a photovoltaic module after installation

FIG. 2 is a schematic view of the stent infrastructure of the present utility model;

FIG. 3 is a schematic view of the column construction details;

FIG. 4 (a) is a schematic illustration of the cable saddle and post support construction details;

FIG. 4 (b) is a schematic view of the saddle pulley assembly in construction detail;

FIG. 5 (a) is a schematic side view of a diagonal column;

FIGS. 5 (b) and 5 (c) are detail views of the anchoring connection of the diagonal stud to the lateral support;

FIG. 6 (a) is a top view of the bracket base structure after completion of the anchored connection with the flexible cable structure;

FIG. 6 (b) is a schematic view of the construction of the bottom flexible cable to foundation tie beam connection anchors;

FIG. 7 (a) is a construction view of a flexible conversion connector;

FIG. 7 (b) is a schematic cross-sectional view of a messenger anchor in a flexible transition joint;

FIG. 7 (c) is a schematic illustration of a cable anchoring device in a flexible transition joint;

FIG. 7 (d) is a schematic cross-sectional view of the anchoring clip in the cable anchoring device;

FIG. 8 (a) is a schematic illustration of the connection of the wind-resistant bracket to the carrier cable;

FIG. 8 (b) is a schematic view of the construction of the wind resistant bracket attachment;

Reference numerals illustrate:

1-bracket base structure, 100-base, 110-strip base, 111-outside strip base, 112-inside strip base, 120-base connecting beam, 200-inclined column, 210-FRP sleeve, 220-concrete inclined column, 300-cable saddle, 310-cable saddle pulley component, 311-arc clamping plate, 312-pulley device, 3121-sliding sleeve 3122-round bar, 320-cable saddle bottom plate, 330-triangle rib plate, 400-transverse supporting structure, 410-hoop, 420-connecting lug plate, 430-column support, 440 transverse connecting rod, 500-supporting connector, 510-supporting restraint device and 520-supporting bottom plate;

2-flexible cable structure, 600-flexible cable, 610-carrier cable, 620-anchor cable, 700-flexible conversion connector, 710-carrier cable anchoring device, 711-variable cross section sleeve, 712-modified resin, 720-cable anchoring device, 721-sleeve, 722-flange plate, 723-anchoring clip, 800-anchoring device, 810-anchoring pulley component, 820-anchoring splint, 830-anchoring base plate, 900-wind-resistant bracket, 910-bracket upper chord, 920-bracket diagonal, 930-bracket connector, 931-bracket connecting splint, 932-bracket connecting lug plate;

and 3, a photovoltaic module.

Detailed Description

The flexible photovoltaic bracket based on the composite material is further described by the following drawings and examples, which are conducted under the guidance of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following examples.

This embodiment will be described by taking a flexible photovoltaic support having a building height of 2m as an example on a flat ground having a planar dimension of 20m×10m. The embodiment provides a flexible photovoltaic support based on combined material, mainly includes support foundation structure 1 and flexible cable structure 2. The photovoltaic module 3 is mounted on the flexible guy cable structure 2.

As shown in fig. 1, the bracket base structure 1 includes a foundation 100, a diagonal column 200, a saddle 300, a lateral support 400, and a support link 500. The flexible cable structure 2 is composed of a flexible cable 600 and a flexible transition connector 700. The flexible cable 600 comprises three sections, wherein the middle section is a carrier cable 610 made of a high elastic modulus composite material, the two ends are anchor cables 620 made of a braided composite material, and the carrier cable 610 and the anchor cables 620 are connected through a flexible conversion connecting piece 700. The anchor cables 620 at the two ends of the flexible cable 600 bypass the inclined upright posts 200 at the two sides and are in anchor connection with the foundation through the anchor device 800, and the middle carrier cable 610 is restrained by a plurality of wind-resistant brackets 900. The height difference between adjacent flexible cables 600 provides different inclination angles for the photovoltaic modules 3, which can be installed according to the illustration, and finally form an array of photovoltaic modules 3.

As shown in fig. 2, the foundation 100 is composed of a bar-shaped foundation 110 and a foundation bridge 120. The bar-shaped foundation 110 is composed of an outer bar-shaped foundation 111 and an inner bar-shaped foundation 112 which are parallel to each other, and the outer bar-shaped foundation 111 and the inner bar-shaped foundation 112 are connected through a foundation connecting beam 120. A plurality of parallel inclined upright posts 200 are arranged on the strip-shaped foundation 1, and the lower ends of the inclined upright posts 200 are connected with the inner strip-shaped foundation 112.

As shown in fig. 3, the inclined upright post 200 is mainly composed of a concrete inclined upright post 220, and an FRP sleeve 210 is arranged on the outer side of the concrete inclined upright post 220, wherein the FRP sleeve 210 can also be used as a template of the concrete inclined upright post 220, and the FRP sleeve 210 is integrally cast or sectionally cast with the strip-shaped foundation 110 through casting concrete, so that the connection performance of the FRP sleeve 210 is ensured. The manner in which each diagonal column 200 is poured is substantially equal.

As shown in fig. 4 (a) and 4 (b), a saddle 300 is provided on the top of the diagonal column 200, and the saddle 300 includes a saddle pulley member 310, a saddle bottom plate 320, and triangular ribs 330. The cable saddle pulley component 310 comprises an arc clamping plate 311 and a pulley device 312, and the triangular rib plates 330 are perpendicular to the arc clamping plate 311, so that the out-of-plane rigidity of the arc clamping plate 311 is improved. The arc clamping plate 311 is provided with a pulley device 312, and the pulley device 312 is formed by connecting a sliding sleeve 3121 and a round rod 3122 in a penetrating way. The pulley device 312 is used to switch the direction of the stress of the flexible cable 600 and reduce the friction between the saddle and the flexible cable 600 so that the direction of the resultant force applied by the diagonal column 200 is consistent with the inclination angle of the diagonal column 200. The saddle bottom plate 320 is connected with the top of the inclined upright post 200 through the embedded bolts, so that the connection performance of the saddle and the inclined upright post 200 is ensured.

As shown in fig. 4 (a) and 5 (a), there is a height difference between adjacent diagonal columns 200, and the tall diagonal columns and the short diagonal columns are alternately arranged, and the height difference is used to realize different installation angles of the photovoltaic module. A transverse support 400 is provided between adjacent diagonal columns 200, the transverse support 400 including a collar 410, a connecting lug 420, a column support 430 and a transverse connecting rod 440, the transverse support 400 effectively preventing the diagonal columns 200 from tilting sideways. The upper end of the inclined upright post 200 is provided with a hoop 410, and two sides of the hoop 410 are welded with connecting lugs 420. The connecting lug plate 420 is used for connecting the upright post support 430 and the transverse connecting rod 440 in a bolt connection mode. The mounting gap between the ferrule 410 and the diagonal column 200 is filled with an adhesive to secure the ferrule to the diagonal column.

As shown in fig. 5 (a), 5 (b) and 5 (c), the upper ends of the edge column supports 430 are connected to the diagonal column 200, and the other ends are anchored to the foundation 100 by the support connectors 500. The support link 500 includes a support restraint 510, a support floor 520. The support base 520 is attached to the foundation 100 in a manner substantially identical to the manner described above for the base, and is also secured to the foundation 100 using bolts. The support restraining device 510 is mainly used for restraining the column support 430.

As shown in fig. 6 (a), the carrier cable 610 is used for mounting a photovoltaic module using any one of glass fiber reinforced plastic (CFRP), basalt fiber reinforced resin (BFRP), and carbon fiber reinforced composite material (GFRP), for example. The anchor cable 620 is made of any one of Aramid Fiber (GFRP) reinforced nylon (PA) and ultra-high molecular weight polyethylene (UHMWPE) composite material through a braiding process. The anchor cable 620 and the carrier cable 610 are made of different materials and are connected by the flexible conversion connecting piece 700. The free end of the anchor cable 620 is connected to the foundation 100 by the anchor 800.

As shown in fig. 6 (b), the free end of the flexible cable 600 is connected to the base 100 by an anchor 800. The anchoring device 800 is composed of an anchor pulley member 810 and an anchor clamping plate 820 and an anchor bottom plate 830. The anchor pulley member 810 is substantially identical to the pulley arrangement 312 in the cable saddle for changing the direction of the flexible cable 600. The anchor pulley member 810 is coupled to the anchor base plate 830, and the anchor clamping plate 820 is coupled to the anchor base plate 830 by bolts. The whole anchoring device 800 has the following functions of (1) enabling the inhaul cable of the flexible inhaul cable 600 to bypass the sliding sleeve to form a reasonable force transmission system, and (2) enabling the anchoring splint 820 and the anchoring base plate 830 to have semicircular arc grooves, forming a larger contact area with the free end of the flexible inhaul cable 600, and providing enough anchoring force.

As shown in fig. 7 (a), the flexible conversion connector 700 includes a messenger anchor 710 and a cable anchor 720. As shown in fig. 7 (b), the main structure of the carrier cable anchoring device 710 is a variable cross-section sleeve 711, and the carrier cable 610 is anchored by filling a modified resin 712. Preferably, the center of the variable cross-section sleeve 711 is a circular hole, the hole is gradually increased, and a filling mode of variable stiffness anchoring is adopted, namely, the elastic modulus of modified resin filled in each section is gradually increased along the direction of the free end of the carrier rope 610, so that the anchoring performance of the carrier rope 610 is improved. As shown in fig. 7 (c), the cable anchoring device 720 includes a sleeve 721, a flange 722, and an anchoring clip 723. The end of the variable cross-section sleeve 711 is reserved with a bolt hole for connecting with the flange 722 in a bolt connection mode. A hole is left in the center of the flange 722, and the flange 722 can be used as an anchor ring and form an anchoring device for anchoring the inhaul cable 620 together with the anchoring clamping piece 723. As shown in fig. 7 (d), the anchoring clip 723 has an annular groove inside, and the outside variable cross-section configuration can further enhance the anchoring performance of the anchoring cable 620.

As shown in fig. 8 (a), as a flexible photovoltaic support based on a composite material, the overall stability of the flexible photovoltaic support should be ensured. The carrier cable 610 should be designed to ensure that its primary form of force is in longitudinal tension to fully utilize the properties of the FRP material. The wind-resistant support 900 is arranged between the flexible inhaul cables 600 to improve the overall stability of the flexible photovoltaic support, and is used for preventing the flexible inhaul cables 600 from shaking violently. The wind resistant stand 900 includes a stand upper chord 910, a stand diagonal 920, and a stand attachment 930. The arrangement of the wind resistant stand 900 may take the form of the arrangement shown in the drawings. Other arrangements of the wind resistant brackets 900 may be employed, provided that they provide the same wind resistant effect and do not affect the load bearing performance of the carrier cable 610.

As shown in fig. 8 (a) and 8 (b), the bracket coupler 930 includes a bracket coupler clip 931 and a bracket coupler ear 932, and the bracket coupler clip 931 and the bracket coupler ear 932 are integrally molded. The support connecting clamping plate 931 should be designed with a sufficient longitudinal length, so that the force transmitted by the support rod piece is dispersed to the carrier cable 610, the concentration of the force on the carrier cable 610 is avoided, and the support connecting clamping plate 931 and the carrier cable 610 can be connected by bolts. The bracket attachment lugs 932 are used to attach the bracket diagonal 920, the bracket top chord 910, and the attachment may be by bolting. The support diagonal 920, the support top chord 910 is substantially identical to the rod of the upright support 430, and the rod of the wind-resistant support 900 may have a smaller cross section, so as to ensure that the wind-resistant support 900 can effectively restrict the deformation between the flexible cables 600.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these examples and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications within the scope of the present utility model.

Claims (9)

1. A flexible photovoltaic support based on composite materials, characterized in that: it includes a support base structure and a flexible cable structure; both ends of the flexible cable structure are fixed to the support base structure; the flexible cable structure is composed of flexible cables and flexible conversion connectors, the flexible cables include three sections, the middle section is a load-bearing cable made of high elastic modulus composite material, the two end sections are anchor cables made of braided composite material, and the load-bearing cable and the anchor cables are connected by flexible conversion connectors. 2. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: the support foundation structure includes a strip foundation, inclined columns, cable saddles, transverse supports, and support connectors; a plurality of parallel inclined columns are arranged on the strip foundation, adjacent inclined columns having a height difference and being arranged at intervals; the lower end of the inclined column is connected to the strip foundation, and the upper end is equipped with a cable saddle; adjacent inclined columns are connected by transverse supports and cable saddles; the inclined columns at both ends of the strip foundation are connected by column supports and transverse supports; the lower end of the column supports is fixed to the strip foundation by support connectors. 3. The flexible photovoltaic support based on composite materials according to claim 2, characterized in that: the inclined column is composed of an FRP sleeve and the concrete inside it, and the inclined column forms a 45-degree angle with the strip foundation. 4. The flexible photovoltaic support based on composite materials according to claim 2, characterized in that: the cable saddle includes a cable saddle base plate, a triangular rib plate, and a cable saddle pulley component, which are connected by welding; the cable saddle pulley component includes an arc-shaped clamping plate and a pulley device; the cable saddle base plate is fixed to the top of the inclined column by bolts. 5. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: one end of the flexible conversion connector is a load-bearing cable anchoring device, and the other end is a tension cable anchoring device; the load-bearing cable anchoring device is composed of a variable cross-section sleeve and modified resin filled inside it; the modified resin is used to anchor the load-bearing cable; the tension cable anchoring device includes a connecting sleeve and a flange; the load-bearing cable anchoring device and the tension cable anchoring device are connected by bolts. 6. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: the load-bearing cable is made of any one of glass fiber reinforced plastic, basalt fiber reinforced resin, or carbon fiber reinforced matrix composite material, and is used to install photovoltaic modules. 7. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: the anchoring cable is made of any one of aramid fiber, glass fiber reinforced nylon, or ultra-high molecular weight polyethylene composite material, and is manufactured by a weaving process. 8. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: the free end of the anchor cable passes around the saddle at the upper end of the inclined column and is fixed to the strip foundation by an anchoring device. 9. The flexible photovoltaic support based on composite materials according to claim 1, characterized in that: a wind-resistant support is provided between adjacent load-bearing cables; the wind-resistant support includes a support diagonal member, a support upper chord, and a support connector; the support diagonal member and the support upper chord are connected to the support connector by bolts; the support connector includes a support connecting clamp and a support connecting lug.