Large-span fish belly type flexible photovoltaic support structure

Abstract

The utility model relates to a large-span fish belly type flexible photovoltaic support structure which comprises a first support, a second support, at least two stabilizing cables, at least one bearing cable and at least one supporting rod. The upper end of the supporting rod is fixed to the stabilizing cable, and the lower end of the supporting rod is fixed to the bearing cable. Through the supporting rod, the stabilizing cable is in an arc shape with the middle arched upwards, and the bearing cable is in an arc shape with the middle drooping; the distance between the first position and the second position of the first support in the height direction is 1 / 3-2 / 3 of the maximum height of the supporting rod. According to the utility model, by arranging the fish-bellied bearing cable, the deformation of the flexible photovoltaic support structure under the action of wind pressure and wind suction force can be effectively reduced, the most unfavorable wind load effect is weakened, the wind resistance purpose is achieved, and while the flexible photovoltaic support structure is suitable for a large span, the structural quality of the flexible cable is effectively reduced, the safety of a photovoltaic assembly and the structure is ensured, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power stations, and in particular to a large-span fish-belly type flexible photovoltaic support structure capable of reducing wind load effects. Background Art

[0002] Due to the scarcity of land resources, photovoltaic power stations are gradually being built in complex scenarios such as mountainous areas or Gobi Desert. In some areas, it is also necessary to consider the combination of fisheries, agriculture and photovoltaic power generation. The spanning capacity of ordinary single-layer suspension photovoltaic brackets is limited. When encountering large-span scenarios such as deep water or fish ponds, hills with broken topography, or mountains with undulating terrain, single-layer suspension cables may be far from meeting the site span requirements of special scenarios. In addition, under a specific span, the cable force of the single-layer suspension structure is large, and the requirements for the support are high, which further increases the construction cost of the structure.

[0003] Flexible photovoltaic support structures are wind-sensitive structures. The displacement caused by wind loads will cause hidden cracks in photovoltaic modules and even cause large-scale damage, making it impossible for photovoltaic power stations to operate normally. Wind pressure and wind suction are the most unfavorable load effects on structures. Although traditional single-layer cable suspension structures can withstand the load effects of module deadweight, wind pressure and wind suction through stabilizing cables, they often require a large prestress to offset the wind load effect, which will lead to larger cable forces and cable cross-sections. Although traditional three-cable flexible photovoltaic support structures can effectively withstand the vertical loads generated by deadweight and wind pressure through stabilizing cables, for the upward vertical loads generated by wind suction, since the load-bearing cables have little effect on wind suction, the structure will have a large wind suction response, making the structure unsafe.

[0004] Therefore, how to simultaneously limit the wind pressure and wind suction effects of flexible photovoltaic brackets has become the focus of designers and researchers. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the purpose of the utility model is to provide a large-span fish-belly flexible photovoltaic support structure that can reduce the wind load effect. The photovoltaic support structure can effectively reduce the deformation of the flexible photovoltaic support under wind pressure and wind suction, weaken the wind load effect, achieve the purpose of wind resistance, and ensure the safety of photovoltaic components and structures.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A large-span fish-belly type flexible photovoltaic support structure, the photovoltaic support structure comprising:

[0008] A bracket, the bracket comprising a first bracket and a second bracket arranged at an interval;

[0009] At least two stabilizing cables, the stabilizing cables being fixed between the first bracket and the second bracket; the stabilizing cables being used to install the photovoltaic module;

[0010] The fixing position of the stabilizing cable and the first bracket is located at the first position of the first bracket in the height direction, and the fixing position of the stabilizing cable and the second bracket is located at the first position of the second bracket in the height direction;

[0011] At least one load-bearing cable, both ends of which are fixedly connected to the first bracket and the second bracket respectively, the fixed position of the load-bearing cable and the first bracket is located at the second position of the first bracket in the height direction, and the fixed position of the load-bearing cable and the second bracket is located at the second position of the second bracket in the height direction; the second position of the first bracket in the height direction is higher than its first position, and the second position of the second bracket in the height direction is higher than its first position; the distance between the first position and the second position of the first bracket in the height direction is equal to the distance between the first position and the second position of the second bracket in the height direction;

[0012] And at least one support rod, the upper end of the support rod is fixed on the stabilizing cable, and the lower end is fixed on the load-bearing cable; through the support rod, the stabilizing cable is in an arc shape with the middle part arched upward, and the load-bearing cable is in an arc shape with the middle part drooping.

[0013] According to the preferred embodiment of the present invention, the distance between the first position and the second position of the first bracket is 1 / 3 to 2 / 3 of the maximum support rod height. When the distance between the first position and the second position of the first bracket is 1 / 3 to 2 / 3 of the maximum support rod height, the overall stability is optimal.

[0014] Preferably, according to the utility model, the first bracket and the second bracket both include a column and a crossbeam; the crossbeam is fixed at a position at a set distance from the column; the end of the stabilizing cable is connected to the crossbeam; and the end of the load-bearing cable is connected to the top of the column.

[0015] Preferably, according to the present invention, the first bracket and the second bracket are respectively provided with a stay cable.

[0016] Preferably, according to the present invention, the number n of the support rods is an odd number, and the support rods are arranged at n+1 equal divisions of the photovoltaic support structure along the span.

[0017] Preferably, according to the present invention, the support rod is triangular, and comprises a first support rod connected to a stabilizing cable, and a second support rod and a third support rod located below the first support rod.

[0018] Preferably, according to the present invention, the stabilizing cable, the load-bearing cable and the inclined cable are all made of hot-dip galvanized steel strands, and the diameters of the three are all in the range of 9 to 22 mm.

[0019] Preferably, according to the utility model, the lower end of the inclined cable is connected to the ground, and the angle between the inclined cable and the ground ranges from 30° to 60°.

[0020] Preferably, the span of the photovoltaic support structure is 10m~50m; the distance between the lowest point of the load-bearing cable and the midpoint of the first support rod is 1 / 10~1 / 20 of the span of the photovoltaic support structure. When the distance between the lowest point of the load-bearing cable and the midpoint of the first support rod is 1 / 10~1 / 20 of the span of the stabilizing cable, the photovoltaic support is optimal in resisting wind load effects.

[0021] Preferably, according to the present invention, the highest point of the stabilizing cable is flush with the position where the first bracket and the second bracket are connected to the load-bearing cable.

[0022] (1) The utility model can reduce the deformation of the flexible photovoltaic bracket under the action of wind pressure by adding an arc-shaped load-bearing cable on the basis of a single-layer suspension cable; by setting a certain degree of anti-arch stabilizing cable, it can reduce the deformation under the action of wind suction, weaken the wind load effect, achieve the purpose of wind resistance, and ensure the safety of photovoltaic components and structures. The setting of the anti-arch stabilizing cable is conducive to reducing the final vertical displacement and improving the stability of the structure.

[0023] (2) Compared with the single-layer suspension cable photovoltaic module and the traditional three-cable structure, the fish-belly flexible photovoltaic support structure described in the utility model can better resist the wind load effect, and its structure is lighter in weight, meeting the requirements of engineering economy. The utility model stabilizer cable integrates the functions of resisting wind load effect and carrying solar photovoltaic modules.

[0024] (3) The utility model can adapt to different wind force levels by adjusting the degree of the anti-arch stabilizing cable and the lowest point of the concave load-bearing cable. On this basis, the ability to cross the site with a large span is obtained by adjusting the number of support rods and applying prestress to the stabilizing cable of the installation assembly.

[0025] (4) The utility model can adapt to different complex terrains, such as the ground surface of the fish pond bank of different heights, by adjusting the length of the anchor end and the column pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the fish-belly type flexible photovoltaic support structure in the utility model;

[0027] Figure 2 It is the front view of the fish-belly type flexible photovoltaic support structure in the utility model.

[0028] in:

[0029] 1. Column, 2. Beam, 3. Stabilizing cable, 4. Load-bearing cable, 5. Stay cable, 6. Solar photovoltaic module, 7. Support. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings:

[0031] like Figure 1~Figure 2 A large-span fish-belly flexible photovoltaic support structure is shown, comprising a first support, a second support, at least two stabilizing cables 3, at least one load-bearing cable 4 and at least one support rod 7. The first support is fixed at a first position of the foundation; the second support is fixed at a second position of the foundation. The foundation includes but is not limited to the ground, the lake bottom and other constructable environments.

[0032] The utility model can effectively reduce the deformation of the flexible photovoltaic support structure under the action of wind pressure and wind suction by setting a fish-belly stabilizing cable, weaken the most unfavorable wind load effect, and achieve the purpose of wind resistance. While being suitable for large spans, it effectively reduces the structural quality of the flexible cable, ensures the safety of photovoltaic components and structures, and reduces construction costs. The prestressed effect of the load-bearing cable in the prestressed state causes the structure to produce reverse deflection. The addition of a fish-belly reverse arch arc stabilizing cable will partially offset the existing deflections, thereby reducing the final vertical displacement. And the added arc shape makes the stabilizing cable multifunctional, including laying solar photovoltaic components on the upper part.

[0033] Specifically, the stabilizing cable 3 and the load-bearing cable 4 are both fixed between two brackets; the fixing position of the stabilizing cable 3 and the bracket is lower than the fixing position of the load-bearing cable 4 and the bracket. By adjusting the fixing positions of the stabilizing cable 3, the load-bearing cable 4 and the bracket, the degree of the span arc is controlled, the cable force of the load-bearing cable and the stabilizing cable is controlled, the stability of the structure is improved, and the torque that may be generated on the stabilizing cable during the wind-induced vibration of the flexible photovoltaic bracket is avoided.

[0034] The support rod 7 is fixed between the stabilizing cable 3 and the load-bearing cable 4. By tensioning the stabilizing cable 3 and the load-bearing cable 4, the stabilizing cable 3 is in an arc shape with the middle portion arching upward, and the load-bearing cable 4 is in an arc shape with the middle portion drooping downward.

[0035] like Figure 1 and Figure 2As shown, the first bracket and the second bracket are both composed of a column 1 and a crossbeam 2. The crossbeam 2 is provided at a certain distance below the top of the column 1, and both ends of the crossbeam 2 are fixedly connected to the column 1 by welding or bolts. Two stabilizing cables 3 of different heights are connected between the crossbeams 2. The stabilizing cables 3 are components that directly carry solar photovoltaic modules and bear loads, and a plurality of solar photovoltaic modules 6 are arranged above the stabilizing cables 3. The two stabilizing cables 3 at different heights can make the solar photovoltaic modules tilt at a certain angle.

[0036] like Figure 1 and Figure 2 As shown, an arc-shaped load-bearing cable 4 is connected between the column of the first bracket and the column of the second bracket. The distance between the lowest point of the load-bearing cable 4 and the stabilizing cable 3 is 1 / 10 to 1 / 20 of the span L, and the highest point of the load-bearing cable 4 is connected to the top of the column of the first bracket and the second bracket. The 1 / 10 to 1 / 20 is the structural rise. f The larger the arrow height, the smaller the corresponding horizontal force of the cable. The horizontal force of the parabolic cable is H=qL 2 / 8 f,q The maximum strut height connected to the stabilizing cable 3 and the load-bearing cable 4 is the sagittal height, which determines the wind resistance of the structure, that is, the strut height is positively correlated with the wind resistance.

[0037] A support rod 7 is connected between the stabilizing cable 3 and the load-bearing cable 4, the upper end of the support rod 7 is connected to two stabilizing cables 3, the support rod 7 is arranged between the stabilizing cables 3, and the lower end of the support rod 7 is connected to the load-bearing cable 4 at an intersection point, so that the stabilizing cable 3 and the load-bearing cable 4 cooperate to form a spatial cable net to bear the dead weight and wind and snow loads transmitted by the solar photovoltaic assembly 6. Preferably, the support 7 is a triangular support rod, that is, a triangle formed by three support rods.

[0038] When subjected to vertical downward loads, including the deadweight of the constant load solar photovoltaic assembly 6, snow loads and wind pressure loads, the stabilizing cable 3 transfers the load to the load-bearing cable 4 and the columns 1 of the supports on both sides; when subjected to upward wind suction loads, the stabilizing cable 3 transfers the load to the crossbeams 2 of the supports on both sides.

[0039] The degree of anti-arching of the stabilizing cable 3 is positively correlated with the wind suction resistance, but the solar photovoltaic assembly 6 needs to be set on its upper part. The distance between the highest point in the middle of the stabilizing cable 3 and the lowest point at both ends can be set to 1 / 3-2 / 3 of the height of the middle support rod to resist the wind pressure and wind suction of the structure, while limiting the vertical upward and vertical downward displacement of the overall structure. The design value is 1 / 3-2 / 3. When the load deformation condition is met, the cable force is greatly reduced compared with the cable force of the conventional cable truss flexible photovoltaic bracket, maintaining high wind resistance and reducing engineering economy.

[0040] like Figure 2As shown, the position where the cross beam 2 connected to the stabilizing cable 3 at a certain distance from the top of the column 1 is connected to one end of the inclined cable 5, and the other end of the inclined cable 5 is fixed to the ground foundation. The inclined cable 5 is set on the opposite sides of the column, and the angle between it and the ground is in the range of 30°~60°. The inclined cable is fixed on the anchor pile. The smaller the angle with the ground, the smaller the cable force of the inclined cable, which is set according to the horizontal force of the cable at the corresponding position of the column.

[0041] The solar photovoltaic module 6 transfers the load it bears to the columns 1 and the inclined cables 5 on both sides, and then to the ground by the columns 1 and the inclined cables 5. The anchoring end of the flexible photovoltaic support structure is jointly acted upon by the columns 1, the beams 2 and the inclined cables 5. The function of the inclined cables 5 is to balance the horizontal forces borne by the stabilizing cables 3 and the load-bearing cables 4, and to reduce the bending moment at the bottom of the column 1.

[0042] The diameters of the stabilizing cables 3, the load-bearing cables 4 and the inclined cables 5 are all in the range of 9 to 22 mm, and the materials are hot-dip galvanized steel strands with a strength grade of 1770 MPa, 1860 MPa or 1960 MPa.

[0043] The lengths of the stabilizing cable 3 and the load-bearing cable 4 need to be determined according to the span and structural rise of the flexible photovoltaic support structure, and the length of the inclined cable 5 needs to be determined according to the height of the column 1 and the inclination angle between the inclined cable and the ground.

[0044] In summary, the utility model can effectively reduce the deformation of the flexible photovoltaic support structure under wind pressure and wind suction by setting a fish-belly load-bearing cable, weaken the most unfavorable wind load effect, achieve the purpose of wind resistance, and is suitable for large spans while effectively reducing the structural quality of the flexible cable, ensuring the safety of photovoltaic components and structures, and reducing construction costs.

[0045] The installation method of the utility model is:

[0046] (1) Driving piles on both sides of the pond, including several anchor ends of the support.

[0047] (2) Install several columns 1 and beams 2.

[0048] (3) Lay and install several stabilizing cables 3.

[0049] (4) Install several support members 7.

[0050] (5) Lay and install several load-bearing cables 4, and lift the elevations of the support rods 7 and stabilizing cables 3 at different span positions to the set elevations.

[0051] (6) Install the inclined cables 5, and tension the stabilizing cables 3 and the load-bearing cables 4 through the inclined cables 5 at the top of the column 1 and the position of the crossbeam 2. The load-bearing cables 4 are tensioned together with the stabilizing cables 3 to ensure that the stabilizing cables 3 and the load-bearing cables 4 are in a tensioned state under their own weight.

[0052] (7) Install solar photovoltaic panels 6.

[0053] (8) The load-bearing cable 4 and the stabilizing cable 3 are tensioned twice to the specified prestress value.

[0054] (9) Check the tightness of the nodes and fasteners at each connection position and the installation is complete.

[0055] Compared with the conventional cable truss flexible photovoltaic support structure, the utility model adds a concave load-bearing cable and an inverted arched stabilizing cable to achieve the functional integration of the stabilizing cable's wind load resistance effect and the carrying of solar photovoltaic components. The structure can effectively resist the wind load effect, form an overall spatial cable network, and improve the structural stability and anti-torsion. Ensure structural performance and reduce engineering economy.

[0056] The above-described embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A large-span fish-belly flexible photovoltaic support structure, characterized in that: The photovoltaic support structure includes: A bracket, the bracket comprising a first bracket and a second bracket arranged at an interval; At least two stabilizing cables (3), the stabilizing cables (3) being fixed between a first bracket and a second bracket; the stabilizing cables (3) being used to install a photovoltaic module (6); the fixing position of the stabilizing cables (3) and the first bracket being located at a first position of the first bracket in a height direction, and the fixing position of the stabilizing cables (3) and the second bracket being located at a first position of the second bracket in a height direction; at least one load-bearing cable (4), the two ends of the load-bearing cable (4) being fixedly connected to the first bracket and the second bracket respectively; the fixed position of the load-bearing cable (4) and the first bracket is located at the second position of the first bracket in the height direction; the fixed position of the load-bearing cable (4) and the second bracket is located at the second position of the second bracket in the height direction; the second position of the first bracket in the height direction is higher than its first position, and the second position of the second bracket in the height direction is higher than its first position; the distance between the first position and the second position of the first bracket in the height direction is equal to the distance between the first position and the second position of the second bracket in the height direction; and at least one support rod (7), the upper end of the support rod (7) being fixed to the stabilizing cable (3), and the lower end being fixed to the load-bearing cable (4); through the support rod (7), the stabilizing cable (3) is formed into an arc shape with its middle portion arching upward, and the load-bearing cable (4) is formed into an arc shape with its middle portion drooping downward.

2. The large-span fish-belly flexible photovoltaic support structure according to claim 1 is characterized in that: The distance between the first position and the second position of the first bracket is 1 / 3 to 2 / 3 of the maximum support rod height.

3. The large-span fish-belly flexible photovoltaic support structure according to claim 1 is characterized in that: The first bracket and the second bracket both comprise a column (1) and a crossbeam (2); The end of the stabilizing cable (3) is connected to the crossbeam (2); The end of the load-bearing cable (4) is connected to the top of the column.

4. The large-span fish-belly flexible photovoltaic support structure according to claim 1 is characterized in that: The first bracket and the second bracket are respectively provided with a stay cable (5).

5. The large-span fish-belly flexible photovoltaic support structure according to claim 1 is characterized in that: The number n of the support rods (7) is an odd number, and the support rods (7) are arranged at n+1 equal divisions along the span of the photovoltaic support structure.

6. The large-span fish-belly flexible photovoltaic support structure according to claim 1 or 5, characterized in that: The support rod (7) is triangular in shape, and comprises a first support rod connected to the stabilizing cable (3), and a second support rod and a third support rod located below the first support rod.

7. The large-span fish-belly flexible photovoltaic support structure according to claim 4 is characterized in that: The stabilizing cable (3), the load-bearing cable (4) and the inclined cable (5) are all made of hot-dip galvanized steel strands, and the diameters of the three are all in the range of 9 to 22 mm.

8. The large-span fish-belly flexible photovoltaic support structure according to claim 4 is characterized in that: The lower end of the inclined cable (5) is connected to the ground, and the angle between the inclined cable (5) and the ground is in the range of 30° to 60°.

9. The large-span fish-belly flexible photovoltaic support structure according to claim 6, characterized in that: The span of the photovoltaic support structure is 10m~50m; The distance between the lowest point of the load-bearing cable (4) and the midpoint of the first support rod is 1 / 10 to 1 / 20 of the span of the photovoltaic support structure.

10. The large-span fish-belly flexible photovoltaic support structure according to claim 1, characterized in that: The highest point of the stabilizing cable (3) is flush with the position where the first bracket and the second bracket are connected to the load-bearing cable (4).

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