Large-span multi-layer prestressed cable structure supporting system for photovoltaic module

Abstract

The utility model discloses a photovoltaic module large-span multi-layer prestressed cable structure supporting system which comprises end columns arranged on two sides, a front end column and a rear end column which are arranged on each side, a front bearing cable, a rear bearing cable, a front prestressed cable structure and a rear prestressed cable structure which are arranged between the end columns on the two sides, and a plurality of supporting wingceltis strips arranged between the front bearing cable and the rear bearing cable. And the photovoltaic module is arranged on the supporting wingceltis strips. The system is mainly characterized in that a multi-layer prestressed cable structure is adopted, a positive wind resistant cable structure adopts a multi-layer drooping type prestressed cable, and a negative wind resistant cable structure adopts a multi-layer upper arch type prestressed cable.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic power generation, and specifically relates to a photovoltaic component large-span multi-layer prestressed cable structure support system. Background Art

[0002] Compared with traditional steel support structures, the prestressed cable support structure of photovoltaic modules has the advantages of large span, high clearance and land resource conservation. It has the advantage of being used in scenarios where the number of piles is strictly limited, such as fish ponds, sewage treatment plants and vegetation land, and can achieve the effect of upper photovoltaic power generation and lower land use without mutual influence. The prestressed cable structure of photovoltaic modules usually adopts a single-layer cable structure or a double-layer cable structure, and the more common span is 20-35m. When facing application scenarios with a span of more than 50m such as sewage treatment plants and ditches, the commonly used single-layer cable or double-layer cable structure will produce large deformation due to the characteristics of the structure itself, and the system stiffness will be reduced. At the same time, the prestress of the cable will increase significantly, which will lead to certain limitations on the safety, wind resistance and construction feasibility of the structure itself.

[0003] Patent CN217216410U is a single-layer prestressed cable support structure for photovoltaic modules. Two prestressed cables form a certain height difference through the end steel structure to meet the inclination angle requirements of photovoltaic modules. This type of cable structure is simple, but for spans above 30m, the cable structure deforms greatly. Due to the lack of a structural system to resist positive and negative winds, the overall wind resistance is weak, and it is suitable for small span scenarios. Patent CN217849294U is a double-layer prestressed cable support structure for photovoltaic modules. Two prestressed cables with a certain height difference are arranged on the upper layer of the structure. The modules are installed on the upper cables to meet the inclination requirements of the modules. The lower cables are connected to the upper cables through a steel structure to improve the overall resistance to positive winds. This form has improved wind resistance, but for spans exceeding 50m, the prestress of the cable structure needs to be greatly increased to reduce deformation, which is difficult to construct. At the same time, due to the increase in span, the resistance to negative winds also faces certain challenges. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned background technology, the utility model provides a photovoltaic module large-span multi-layer prestressed cable structure support system, which has good resistance to both positive wind and negative wind. The multi-layer cable structure will reduce the prestress of a single cable and facilitate construction.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A photovoltaic module large-span multi-layer prestressed cable structure support system includes: end columns are arranged on both sides, two front and rear end columns are arranged on each side, two front and rear load-bearing cables and two sets of front and rear prestressed cable structures are arranged between the end columns on both sides, a number of supporting bars are arranged between the front and rear load-bearing cables, and the photovoltaic modules are arranged on the supporting bars.

[0007] Preferably, of the two end columns on the same side, the height of the end column located in the front is greater than the height of the end column located in the rear.

[0008] Preferably, of the two end columns on the same side, the height of the end column located in the front is smaller than the height of the end column located in the rear.

[0009] Preferably, each set of prestressed cable structures includes anti-tension cables, a first layer of anti-compression cables and a second layer of anti-compression cables arranged in sequence from top to bottom, and also includes a plurality of prestressed cable connecting rods connected to the anti-tension cables, the first layer of anti-compression cables and the second layer of anti-compression cables.

[0010] Preferably, among the several prestressed cable connecting rods, the prestressed cable connecting rod located in the middle has the largest length, and the lengths of the prestressed cable connecting rods arranged on both sides decrease successively.

[0011] Preferably, the upper end of the prestressed cable connecting rod is connected to the tensile cable, the middle or lower middle part of the prestressed cable connecting rod is connected to the first layer of compression cables, and the lower end of the prestressed cable connecting rod is connected to the second layer of compression cables.

[0012] Preferably, it also includes an anchoring hoop, which includes two corresponding arc structures, mounting plates are provided on both sides of the arc structures, and prestressed cable holes for connecting the prestressed cable structure and bolt fastening holes for mounting bolts to pass through are provided at corresponding positions of the mounting plates of the two arc structures.

[0013] Preferably, it also includes a limiting structure arranged outside the end column, which is a circular cage-shaped structure composed of multiple steel rods, the upper part of which is welded and fixed to the top of the end column, and the lower part of the rod is welded and connected to the anchor hoop.

[0014] Preferably, it also includes front and rear connecting rods connecting the front and rear corresponding prestressed cable structures.

[0015] The beneficial effects of the utility model are as follows: the most important feature of the system is the use of a multi-layer prestressed cable structure, the cable structure for resisting positive winds uses a multi-layer drooping type prestressed cable, and the cable structure for resisting negative winds uses a multi-layer upward arched type prestressed cable. The addition of an upward arched tensile cable can effectively resist the upward arch deformation of the cable structure caused by wind loads under negative wind conditions, thereby improving the overall negative wind resistance performance; the first layer of compression cables and the second layer of compression cables are used to effectively reduce the pretension of each compression cable, thereby improving the convenience of construction; the compression cables are arranged in parallel, and when they are deformed under the action of their own weight and wind and snow loads, the deformation of the multi-layer compression cables is consistent, and the tension of the compression cables changes consistently, and there will be no situation where the tension of a certain compression cable is too large, and the load distribution is reasonable; the structural form of an anchoring hoop is used to fix the ends of the tensile cable and the compression cable in the middle of the end column, thereby reducing the complexity of the cable fixing steel structure at the top of the end column and making reasonable use of the space of the end column; anchors are arranged on both sides of each hoop, which can balance the tension of the prestressed cables on both sides and avoid rotation caused by force on one end of the hoop. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a photovoltaic module large-span multi-layer prestressed cable structure support system according to an embodiment of the utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model.

[0018] Figure 3 This is a schematic diagram of a multi-layer prestressed cable structure according to an embodiment of the utility model.

[0019] Figure 4 This is a schematic diagram of the anchoring hoop structure of the utility model embodiment.

[0020] Figure 5 This is a connection diagram of the anchor clamp according to an embodiment of the utility model.

[0021] Figure numerals: 1, photovoltaic module; 2, prestressed cable structure; 3, end column; 4, supporting purlin; 21, load-bearing cable; 22, tension cable; 23, first layer of compression cable; 24, second layer of compression cable; 25, prestressed cable connecting rod; 26, front and rear connecting rods; 27, anchoring hoop; 28, limiting structure; 271, prestressed cable hole; 272, bolt fastening hole DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] A photovoltaic module 1 large-span multi-layer prestressed cable structure 2 support system includes: end columns 3 are arranged on both sides, and two front and rear end columns 3 are arranged on each side respectively, and two front and rear load-bearing cables 21 and two sets of front and rear prestressed cable structures 2 are arranged between the end columns 3 on both sides, and several supporting bars are arranged between the front and rear load-bearing cables 21, and the photovoltaic module 1 is arranged on the supporting bars.

[0024] Of the two end columns 3 on the same side, the height of the end column 3 located in the front is greater than the height of the end column 3 located in the rear.

[0025] Or, of the two end columns 3 on the same side, the height of the end column 3 located in the front is smaller than the height of the end column 3 located in the rear.

[0026] Each set of prestressed cable structure 2 includes anti-tension cables 22, a first layer of anti-compression cables 23 and a second layer of anti-compression cables 24 arranged in sequence from top to bottom, and also includes a plurality of prestressed cable connecting rods 25 connected to the anti-tension cables 22, the first layer of anti-compression cables 23 and the second layer of anti-compression cables 24.

[0027] Among the several prestressed cable connecting rods 25, the prestressed cable connecting rod 25 located in the middle has the longest length, and the lengths of the prestressed cable connecting rods 25 arranged on both sides decrease in sequence.

[0028] The upper end of the prestressed cable connecting rod 25 is connected to the anti-tension cable 22 , the middle or lower middle part of the prestressed cable connecting rod 25 is connected to the first layer of anti-compression cables 23 , and the lower end of the prestressed cable connecting rod 25 is connected to the second layer of anti-compression cables 24 .

[0029] This embodiment also includes an anchoring hoop 27, which includes two corresponding arc structures, and mounting plates are provided on both sides of the arc structures. Prestressed cable holes 271 for connecting the prestressed cable structure 2 and bolt fastening holes 272 for mounting bolts to pass through are provided at corresponding positions of the mounting plates of the two arc structures.

[0030] This embodiment also includes a limiting structure 28 arranged outside the end column 3. The limiting structure 28 is a circular cage structure composed of multiple steel rods. The upper part is welded and fixed to the top of the end column 3, and the lower part of the rod is welded and connected to the anchor hoop 27.

[0031] This embodiment further includes front and rear connecting rods 26 connecting the front and rear corresponding prestressed cable structures.

[0032] like Figure 1As shown, this embodiment provides a photovoltaic module large-span multi-layer prestressed cable structure support system, and the flexible photovoltaic support system consists of four parts: photovoltaic module 1; prestressed cable structure 2; end column 3; support purlin 4. The end column 3 is used to lift the prestressed cable structure 2 to keep it at a certain position above the ground; the support purlin 4 is installed on the prestressed cable structure 2, and the photovoltaic module 1 is fixed on the support purlin 4 through the frame mounting hole.

[0033] Figure 2 It is a schematic diagram of the overall structure. Figure 3 It is a schematic diagram of a multi-layer prestressed cable structure. This embodiment includes a load-bearing cable 21 and a prestressed cable structure 2; the prestressed cable structure 2 includes an anti-tension cable 22; a first layer of anti-compression cables 23; a second layer of anti-compression cables 24; a prestressed cable connecting rod 25; a front and rear connecting rod 26; an anchoring hoop 27; and a limiting structure 28. The top layer is a horizontally arranged load-bearing cable 21, with both ends fixed on the top of the end column 3. The height difference between the front and rear end columns 3 is formed by the difference in height between the load-bearing cable 21, and the supporting purlin 4 is installed on the load-bearing cable 21 by buckles to form a designed inclination angle. The second layer cable structure is two arched anti-tension cables 22 at the front and rear ends. By changing the connection position of the anti-tension cables 22 and the prestressed cable connecting rod 25, the arch curvature of the anti-tension cables 22 is changed, thereby adjusting the ability of the anti-tension cables 22 to resist negative wind loads. The third layer cable structure is two drooping first layer anti-compression cables 23 at the front and rear ends, and the drooping sag is adjusted by the connection position of the anti-compression cables 23 and the prestressed cable connecting rod 25. The fourth layer of cable structure is a second layer of compression cables 24 parallel to the first layer of compression cables 23. The second layer of compression cables 24 is connected to the bottom of the prestressed cable connecting rod 25, thereby forming a certain verticality. The prestressed cable connecting rod 25 adopts a steel rod structure and is connected to the multi-layer prestressed cable structure. The front and rear connecting rods 26 are multiple connecting rods, which connect the front and rear tensile cables 21 through horizontal rods, and connect the front and rear first layer of compression cables 23 and the front and rear second layer of compression cables 24 through horizontal rods and diagonal bracing rods. The multi-layer cables are also connected to each other by vertical rods to improve the overall structural stability of the cable structure. The ends of the tensile cables 22, the first layer of compression cables 23 and the second layer of compression cables 24 are fixed to the clamping hoop to simplify the anchor fixing structure.

[0034] Figure 4 This is the anchor hoop diagram. Figure 5The diagram is a connection diagram of an anchoring hoop. The anchoring hoop 27 is circular, and its inner diameter is consistent with the diameter of the end column 3. The mounting plates on both sides are provided with prestressed cable holes 271 for the prestressed cable to pass through. The prestressed cable anchor can use the hoop to fix the end of the cable; the connection between the anchoring hoop 27 and the end column 3 is compressed by bolts on both sides of the horizontal plates, thereby increasing the friction between the anchoring hoop 27 and the end column 3 to prevent the anchoring hoop 27 from sliding. The prestressed cable and anchor are preferably installed on both sides of the anchoring hoop 27 to form a balancing force to prevent the anchoring hoop 27 from rotating. The limiting structure 28 is a circular cage structure composed of multiple steel rods. The upper part is welded and fixed to the top of the end column 3, and the lower part of the rod is welded and connected to the anchoring hoop 27. The anchoring hoops 27 are also connected by rod welding. At this time, the limiting structure 28 and the anchoring hoop 27 are rigidly fixed to the end column 3 to prevent the anchoring hoop 27 from sliding up and down under the action of the prestressed cable and limit its displacement.

[0035] The present embodiment proposes a large-span multi-layer prestressed cable structure support system for photovoltaic components. Compared with the prior art, the present embodiment adds an arched anti-tension cable 22, which can effectively resist the arch deformation of the cable structure caused by wind load under negative wind conditions, thereby improving the overall negative wind resistance performance; the first layer of anti-compression cables 23 and the second layer of anti-compression cables 24 are adopted to effectively reduce the pretension of each anti-compression cable and improve the construction convenience; the anti-compression cables are arranged in parallel, and when they are deformed under the action of their own weight and wind and snow loads, the deformations produced by the multi-layer anti-compression cables are consistent, and the tension changes of the anti-compression cables are consistent, and the tension of a certain anti-compression cable will not be too large, and the load distribution is reasonable; the anti-tension cable 22 and the ends of the anti-compression cables 23 and 24 are fixed to the middle part of the end column 3 by an anchoring hoop 27, thereby reducing the complexity of the prestressed cable fixing structure on the top of the end column 3 and reasonably utilizing the space of the end column 3; anchors are arranged on both sides of each hoop, which can balance the tension of the prestressed cables on both sides and avoid rotation caused by force on one end of the hoop.

[0036] Although the present invention uses more terms: 1. photovoltaic module; 2. prestressed cable structure; 3. end column; 4. supporting purlin; 21. load-bearing cable; 22. tension cable; 23. first layer of compression cable; 24. second layer of compression cable; 25. prestressed cable connecting rod; 26. front and rear connecting rods; 27. anchoring hoop; 271. prestressed cable hole; 272. bolt fastening hole. But it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional restrictions.

[0037] The above is only a preferred embodiment of the utility model, but the utility model is not limited to the above specific embodiments. Ordinary technicians in this field can also make some modifications, supplements or replace them with similar methods without departing from the principle of the utility model, which should also be regarded as the protection scope of the utility model.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A photovoltaic module large-span multi-layer prestressed cable structure support system, characterized in that: include: End columns (3) are arranged on both sides, and two front and rear end columns (3) are arranged on each side respectively; two front and rear load-bearing cables (21) and two front and rear prestressed cable structures (2) are arranged between the two side end columns (3); a plurality of supporting bars are arranged between the two front and rear load-bearing cables (21); and the photovoltaic modules (1) are arranged on the supporting bars.

2. A photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 1, characterized in that: Of the two end columns (3) on the same side, the height of the end column (3) located in the front is greater than the height of the end column (3) located in the rear.

3. The photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 1, characterized in that: Of the two end columns (3) on the same side, the height of the end column (3) located in the front is smaller than the height of the end column (3) located in the rear.

4. The photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 1, characterized in that: Each set of the prestressed cable structure (2) comprises anti-tension cables (22), a first layer of anti-compression cables (23) and a second layer of anti-compression cables (24) arranged in sequence from top to bottom, and also comprises a plurality of prestressed cable connecting rods (25) connected to the anti-tension cables (22), the first layer of anti-compression cables (23) and the second layer of anti-compression cables (24).

5. A photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 4, characterized in that: Among the plurality of prestressed cable connecting rods (25), the prestressed cable connecting rod (25) located in the middle has the largest length, and the lengths of the prestressed cable connecting rods (25) arranged on both sides decrease in sequence.

6. A photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 4, characterized in that: The upper end of the prestressed cable connecting rod (25) is connected to the anti-tension cable (22), the middle or lower middle part of the prestressed cable connecting rod (25) is connected to the first layer of anti-compression cables (23), and the lower end of the prestressed cable connecting rod (25) is connected to the second layer of anti-compression cables (24).

7. A photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 1 or 4, characterized in that: It also includes an anchoring hoop (27), which includes two correspondingly arranged arc structures, mounting plates are provided on both sides of the arc structures, and prestressed cable holes (271) for connecting the prestressed cable structure (2) and bolt fastening holes for mounting bolts to pass through are provided at corresponding positions of the mounting plates of the two arc structures.

8. The photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 1, characterized in that: It also includes a limiting structure (28) arranged outside the end column (3), wherein the limiting structure (28) is a circular cage-shaped structure composed of multiple steel rods, the upper part of which is welded and fixed to the top of the end column (3), and the lower part of the rod is welded and connected to the anchoring hoop (27).

9. The photovoltaic module large-span multi-layer prestressed cable structure support system according to claim 4, characterized in that: It also includes front and rear connecting rods (26) for connecting the front and rear corresponding prestressed cable structures (2).

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