Symmetric Balanced Counterweight Large-Span Suspension Photovoltaic Bracket Structure and Usage Method

Abstract

The present invention discloses a large-span suspension photovoltaic support structure with symmetric balanced weights, which relates to the field of renewable clean energy. It includes a water conveyance main canal, a self-supporting frame structure, pulley groups, a combined counterweight block group, and suspension steel cables. Multiple pulley groups are arranged at intervals on the top of the self-supporting frame structure. The two ends of the suspension steel cables are connected to the combined counterweight block group through the pulley groups, and photovoltaic modules are supported on multiple suspension steel cables. The whole of the present invention has no fixed points and can slide freely in the large-span direction. Therefore, it can well adapt to various temporary loads such as strong winds, heavy rains, heavy snows, etc., as well as the thermal expansion and contraction deformation caused by temperature changes. The present invention also relates to a usage method of this large-span suspension photovoltaic support structure with symmetric balanced weights.

Description

Technical Field

[0001] The present invention relates to the field of renewable clean energy, and more specifically, it is a large-span suspension photovoltaic support structure with symmetric balanced weights. The present invention also relates to a method of using such a large-span suspension photovoltaic support structure with symmetric balanced weights. Background Art

[0002] Taking a large water conveyance main canal in water conservancy and water service as an example, it generally has the characteristics of a wide artificial canal (80m - 120m) and a long distance (more than 1200km); moreover, due to the requirement of ensuring the water supply quality, operation and maintenance inspection channels (horse paths) and protection buffer green belts are provided on both sides of the main canal. If the protection scope is considered, the entire width of the main canal can reach 150m; since the water conveyance main canal is generally in the form of an open channel, there is no obstruction in the entire flow channel of the main canal except for control buildings such as sluice gates. Under long-distance conditions, the solar photovoltaic power generation resources within the flow channel of the main canal are very considerable. However, since supports are not allowed to be installed in the channel, the crossing structure above the channel presents the characteristics of a large-span space.

[0003] Therefore, it is necessary to develop a photovoltaic support structure that does not require ground anchors, embedding, or other anchoring and fixing facilities on the premise of not affecting the original water conveyance and water supply functions of the main canal. Summary of the Invention

[0004] The first object of the present invention is to overcome the deficiencies of the above background art, and provide a large-span suspension photovoltaic support structure with symmetric balanced weights.

[0005] The second object of the present invention is to provide a method of using such a large-span suspension photovoltaic support structure with symmetric balanced weights.

[0006] To achieve the above first object, the technical solution of the present invention is: a large-span suspension photovoltaic support structure with symmetric balanced weights, which is characterized in that it includes a water conveyance main canal, a self-supporting frame structure on the horse paths on both sides of the water conveyance main canal, a pulley group on the top of the self-supporting frame structure, a combined counterweight block group on the side of the self-supporting frame structure away from the water conveyance main canal, and suspension steel cables. A plurality of the pulley groups are arranged at intervals on the top of the self-supporting frame structure. Both ends of the suspension steel cables are connected to the combined counterweight block group through the pulley groups, and photovoltaic modules are supported on a plurality of suspension steel cables.

[0007] In the above technical solution, a limiting device is provided on the combined counterweight block group.

[0008] In the above technical solution, the combined counterweight block group is a precast concrete structural member, and the suspension steel cables are steel strands.

[0009] To achieve the above second objective, the technical solution of the present invention is as follows: A method for using a symmetrically balanced counterweight large-span suspension photovoltaic support structure, characterized by comprising the following steps:

[0010] Step 1: Set up a self-supporting frame structure according to the width and clearance of the catwalk. A pulley block is arranged at the top of the self-supporting frame structure, and a combined counterweight block group and a limiting device are arranged on the side of the self-supporting frame structure away from the main water conveyance canal;

[0011] Step 2: Multiple pulley blocks are distributed at a certain interval. The suspension cable is connected to the combined counterweight block group through the pulley blocks on the frame structure to form a prestressed tensioned flexible structure. Place the photovoltaic modules on the tensioned flexible structure and adjust the counterweight of the combined counterweight block group to form a symmetrically balanced stress condition.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1) The suspension cables of the present invention are respectively connected to the combined counterweight block groups on both sides through pulley blocks, and the suspension cables are tightened through the combined counterweight block groups to form a certain prestressed tensioned suspension cable. Under the combination of paired or multiple groups of suspension cables, a large-span flexible strip-shaped or net-shaped structure with load-bearing capacity is formed, on which photovoltaic modules can be laid; under the condition of ensuring the span and sag, the bearing capacity of the tensioned suspension cable is coordinated with the balanced combined counterweight block group to achieve the best stress state, and according to actual needs, by symmetrically increasing or decreasing the counterweight of the combined counterweight block group, the maximum sag of the suspension cable structure and the corresponding load capacity can be adjusted.

[0014] 2) The whole of the present invention has no fixed points and can slide freely in the large-span direction, so it can well adapt to various temporary loads such as strong winds, heavy rains, and heavy snows, as well as the thermal expansion and contraction deformation caused by temperature changes.

[0015] 3) By adjusting the counterweight of the combined counterweight block groups on both sides, the present invention can very conveniently adjust and compensate for the permanent deformation of the suspension cables in the flexible structure, so that the overall structure can maintain long-term stability and not sag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] Among them, 1 - main water conveyance canal, 11 - catwalk, 2 - self-supporting frame structure, 21 - pulley block, 3 - combined counterweight block group, 31 - limiting device, 4 - suspension cable, 5 - photovoltaic module. DETAILED DESCRIPTION OF THE INVENTION

[0018] The implementation of the present invention will be described in detail below in conjunction with the drawings, but they do not constitute a limitation to the present invention, and are only for illustration purposes. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0019] Referring to the attached drawings, it can be seen that a large-span suspension photovoltaic support structure with symmetric balance weights is adopted, which is characterized in that it includes a water conveyance main canal 1, a self-supporting frame structure 2 on the access roads 11 on both sides of the water conveyance main canal 1, a pulley block 21 at the top of the self-supporting frame structure 2, a combined counterweight block group 3 on the side of the self-supporting frame structure 2 away from the water conveyance main canal 1, and a suspension cable 4. A plurality of the pulley blocks 21 are arranged at intervals on the top of the self-supporting frame structure 2. Both ends of the suspension cable 4 are connected to the combined counterweight block group 3 through the pulley blocks 21, and a plurality of photovoltaic modules 5 are laid on the suspension cable 4.

[0020] A limiting device 31 is provided on the combined counterweight block group 3.

[0021] The combined counterweight block group 3 is a precast concrete structural member, and the suspension cable 4 is a steel strand.

[0022] A method of using a large-span suspension photovoltaic support structure with symmetric balance weights is characterized by including the following steps:

[0023] Step 1: Set the self-supporting frame structure 2 according to the width and clearance of the access road 11. A pulley block 21 is provided at the top of the self-supporting frame structure 2, and a combined counterweight block group 3 and a limiting device 31 are provided on the side of the self-supporting frame structure 2 away from the water conveyance main canal 1.

[0024] Step 2: A plurality of pulley blocks 21 are distributed at a certain interval. The suspension cable 4 is connected to the combined counterweight block group 3 through the pulley blocks 21 on the frame structure 2 to form a prestressed tensioned flexible structure. The photovoltaic module 5 is laid on the tensioned flexible structure, and the counterweight of the combined counterweight block group 3 is adjusted to form a symmetric balance stress condition.

[0025] Embodiment

[0026] Taking a certain main canal of the middle route as an example, the main components of the present invention are introduced as follows:

[0027] The water conveyance main canal 1 is an open water conveyance open channel. The channel is generally an artificial concrete lining flow channel without covering on the top. Generally, access roads 11 for operation inspection and transportation and maintenance equipment are provided on both sides of the lined channel. The access roads 11 are concrete or asphalt roads, and generally buffer protection forest belts are also provided on both sides of the access roads 11 for closed management and ensuring water quality safety. The span of the water conveyance main canal 1 is 80m - 120m.

[0028] The self-supporting frame structures 2 are arranged in pairs. The self-supporting frame structures 2 are set according to the width and clearance of the channel access road 11 (such as 4.5m). A pulley block 21 is provided at the top of the self-supporting frame structure 2, and a combined counterweight block group 3 and a limiting device 31 are provided on the side of the self-supporting frame structure 2 away from the water conveyance main canal 1. The combined counterweight block group 3 is a precast concrete structural member.

[0029] The pulley blocks 21 are arranged in pairs and are used to carry and transfer the load of the suspension cable 4. They have constraints in the direction perpendicular to the suspension cable 4 and are in an unconstrained state in the longitudinal direction of the suspension cable 4. The entire flexible structure can freely slide along the span direction according to the stress and load conditions.

[0030] The combined counterweight block group 3 is a precast concrete structural member, which can be precast with plain concrete or made of other materials. The combined counterweight block group 3 is provided with a limiting device 31 (such as a positioning pin, a limiting pin, a limiting rod, etc.). The limiting device 31 is used to prevent the combined counterweight block group 3 from swinging in directions other than the vertical direction. The unit counterweight of the combined counterweight block group 3 is 500 kg, which is convenient for adding and adjusting the counterweight.

[0031] The suspension cable 4 is in the form of a steel strand. The suspension cable 4 is connected to the combined counterweight block groups 3 on both sides through the pulley blocks 21 on the self-supporting frame structure 2 to form a symmetric balanced stress condition. Multiple suspension cables 4 and the corresponding pulley blocks 21 are distributed at a certain interval along the direction of the main water conveyance canal 1 to form a prestressed tensioned flexible structure.

[0032] The photovoltaic modules 5 are mostly photovoltaic modules with glass as the carrier, such as high-efficiency double-sided double-glass photovoltaic modules, and are laid on the tensioned flexible structure.

[0033] Taking the photovoltaic power generation with a typical span of 90 m of the main water conveyance canal 1 as an example, the suspension cable 4 can adopt a steel strand with a cross-sectional area of 120 mm 2 The unilateral double pulley blocks 21, the distance between multiple suspension cables 4 is 1.5 m, and the average load of the photovoltaic module 5 is 20 kg / m 2 . Then the additional total load of the paired suspension cables 4 is 3 t (excluding the self-weight of the suspension cable 4), the single group of pulleys bears 1 t, the unilateral combined counterweight block group 3 is 4 × 0.5 t, the combined counterweight block group 3 is precast with plain concrete with positioning pins, the unit counterweight is 500 kg, and the single-piece volume is 0.4 m 3 .

[0034] The above-mentioned flexible structure of the suspension cable 4 is symmetrically arranged on both sides of the main water conveyance canal 1 and can be arranged in pairs side by side along the water flow direction of the main water conveyance canal 1 to form a large-area photovoltaic power generation system along the long-distance main water conveyance canal 1.

[0035] Other parts not described are all prior arts.

Claims

1. Adopt a large-span suspension photovoltaic support structure with symmetric balanced weights, characterized in that: It includes a water conveyance main canal (1), a self-supporting frame structure (2) on the access roads (11) on both sides of the water conveyance main canal (1), a pulley block (21) on the top of the self-supporting frame structure (2), a combined counterweight block group (3) on the side of the self-supporting frame structure (2) away from the water conveyance main canal (1), and a suspension cable (4). A plurality of the pulley blocks (21) are arranged at intervals on the top of the self-supporting frame structure (2). Both ends of the suspension cable (4) are connected to the combined counterweight block group (3) through the pulley blocks (21). A photovoltaic module (5) is laid on a plurality of suspension cables (4); The suspension cable (4) has no fixed points as a whole and can slide freely in the large-span direction; By symmetrically increasing or decreasing the weights of the combined counterweight block group (3), the maximum sag of the suspension cable (4) structure and the corresponding load capacity are adjusted; The suspension cable (4) is in the form of a steel strand. The suspension cable (4) is connected to the combined counterweight block groups (3) on both sides through the pulley blocks (21) on the self-supporting frame structure (2) to form a symmetric balanced stress condition. A plurality of suspension cables (4) and the corresponding pulley blocks (21) are distributed at a certain interval along the direction of the water conveyance main canal (1) to form a prestressed tension flexible structure.

2. The large-span suspension photovoltaic support structure with symmetric balanced weights according to claim 1, characterized in that: A limiting device (31) is arranged on the combined counterweight block group (3).

3. The large-span suspension photovoltaic support structure with symmetric balanced weights according to claim 2, characterized in that: The combined counterweight block group (3) is a precast concrete structural member, and the suspension cable (4) is a steel strand.

4. The usage method of the large-span suspension photovoltaic support structure with symmetric balanced weights according to any one of claims 1-3, characterized in that it includes the following steps: Step 1: Set the self-supporting frame structure (2) according to the width and clearance of the access road (11). A pulley block (21) is arranged on the top of the self-supporting frame structure (2). A combined counterweight block group (3) and a limiting device (31) are arranged on the side of the self-supporting frame structure (2) away from the water conveyance main canal (1); Step 2: A plurality of pulley blocks (21) are distributed at a certain interval. The suspension cable (4) is connected to the combined counterweight block group (3) through the pulley blocks (21) on the frame structure (2) to form a prestressed tension flexible structure. The photovoltaic module (5) is laid on the tension flexible structure, and the weights of the combined counterweight block group (3) are adjusted to form a symmetric balanced stress condition.

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