Flexible photovoltaic support steel strand connecting rotating shaft capable of adapting to different slope changes of mountain land

Abstract

The utility model discloses a flexible photovoltaic support steel strand connecting rotating shaft capable of adapting to different slope changes of mountainous regions, which comprises an anchorage device and a shaft which are sleeved on the outer side of a steel strand, one end of the anchorage device is connected with the middle part of the shaft, and two ends of the shaft are movably connected with a base. Stepless adjustment can be achieved according to different slopes of mountainous regions, the rotating shaft rotates along with changes of the slopes, it is guaranteed that the steel strands are always parallel to the slopes of the mountainous regions after being tensioned, and the problems of bending friction loss, tensile strength reduction and the like of the steel strands are solved.

Description

Technical Field

[0001] The utility model relates to a photovoltaic flexible bracket and belongs to the technical field of photovoltaic brackets. Background Art

[0002] With the vigorous development of the photovoltaic industry, the land for photovoltaic projects is becoming increasingly scarce. Many undulating mountains and terraces are not fully utilized. How to install photovoltaic brackets under specific land conditions has become a difficult problem in the industry. Many mountain projects have slopes of 20° to 30° within the land area, facing south with good lighting conditions. If this area is not fully utilized, additional land acquisition is required, otherwise the expected capacity cannot be achieved, affecting project benefits.

[0003] In recent years, with the development of flexible photovoltaic brackets, some flexible photovoltaic brackets have been used in mountain projects. Among them, steel strands, as the core components of flexible brackets, play the role of connecting main beams, columns and supporting photovoltaic modules. However, previous flexible photovoltaic brackets have been used in mountain projects, ignoring the problem of different slope changes in mountains. Since the steel strands will generate stiffness after tensioning, when the slope of the mountain is 0°, there will be no angle on both sides of the steel strand anchor point after the steel strand is tensioned. As the slope of the mountain increases, the angle on both sides of the steel strand anchor point becomes larger, and the steel strand will bend after tensioning. Stress concentration will occur at the bend of the steel strand, resulting in bending friction loss and reduced tensile strength. This form greatly increases the potential safety hazards of the structure and may even lead to accidents such as steel strand breakage and damage to photovoltaic modules.

[0004] In addition, due to the angle between the two sides of the steel strands in the traditional flexible photovoltaic support connection structure, it is difficult to achieve the desired pre-tension when the steel strands are tensioned. Insufficient pre-tension will reduce the overall safety of the structure, and the structure will produce large-scale wind-induced vibrations under long-term dynamic loads, causing damage to the structure. Therefore, it is urgent to design a flexible photovoltaic support steel strand connection shaft to adapt to the different slope changes in the mountains, reduce the bending friction loss of the steel strands, and improve the reliability of the structure. Utility Model Content

[0005] The technical problems to be solved by the utility model are: ① the problem of stress concentration at the bending point of the steel strands of the mountain flexible photovoltaic bracket; ② the problem of friction loss in the bending of the steel strands of the mountain flexible photovoltaic bracket; ③ the problem of reduced tensile strength of the steel strands of the mountain flexible photovoltaic bracket; ④ the problem of insufficient pre-tension of the steel strands of the mountain flexible photovoltaic bracket.

[0006] In order to solve the above problems, the technical solution provided by the utility model is as follows:

[0007] A flexible photovoltaic support steel strand connecting shaft that can adapt to different slope changes in mountains includes an anchor and a shaft sleeved on the outside of the steel strand, one end of the anchor is connected to the middle of the shaft, and both ends of the shaft are movably connected to a base.

[0008] Preferably, the diameter of the middle part of the shaft is larger, and the diameters at both ends are smaller; the base includes a bottom plate and a pair of pads arranged on the bottom plate, the pads are provided with U-shaped grooves that match the ends of the shaft, and the outer sides of the two pads are provided with baffles for limiting the middle part of the shaft, and the baffles are provided with holes that match the ends of the shaft.

[0009] Preferably, the anchor and the shaft are provided with a hole for passing the steel strand, and there is a gap between the hole and the outer diameter of the steel strand, so that the steel strand can move inside the anchor and the shaft.

[0010] More preferably, the hole on the shaft is a chamfered tapered hole to prevent wear of the anti-corrosion layer of the steel strand when the steel strand passes through the shaft, and the steel strand will gradually change from an arc to a straight line when it is tensioned. The use of a tapered hole ensures the transition of the steel strand from an arc to a straight line.

[0011] In the utility model, the steel strand connecting shaft can be infinitely adjusted according to different mountain slopes. The shaft rotates as the slope changes, ensuring that the steel strand is always parallel to the mountain slope after being tensioned, avoiding problems such as bending friction loss and reduced tensile strength of the steel strand.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The use of steel strands to connect the rotating shaft can improve the adaptability of the flexible photovoltaic bracket to changes in different mountain slopes, reduce the bending and stress concentration of the steel strands, and increase the service life of the steel strands;

[0014] 2. The use of steel strands to connect the rotating shaft can reduce the bending friction loss and tensile strength reduction of the steel strands, ensuring the safety and stability of the steel strands during the operation of the flexible photovoltaic support;

[0015] 3. Using steel strands to connect the rotating shaft is more conducive to load transmission on the steel strands, which can increase the overall pre-tension of the steel strands, reduce the deflection of the flexible bracket, reduce the amplitude of wind-induced vibration of the structure, and enhance wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the flexible photovoltaic bracket provided by the utility model when the steel strands are connected to the rotating shaft;

[0017] Figure 2 for Figure 1 A partial enlarged view of part I;

[0018] Figure 3 An exploded view of the steel strand connection shaft of the flexible photovoltaic support provided by the utility model;

[0019] Figure 4 is a schematic diagram of the axis;

[0020] Figure 5 is the main view of the axis;

[0021] Figure 6 is the perspective view of the axis;

[0022] Figure 7 This is a working principle diagram of the steel strand connection shaft of the flexible photovoltaic support provided by the utility model. DETAILED DESCRIPTION

[0023] In order to make the present invention more obvious and easy to understand, preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

[0024] Example

[0025] like Figure 1-3 As shown, a flexible photovoltaic support steel strand connecting shaft which can adapt to different slope changes in mountains is provided by the utility model. The connecting shaft R includes an anchor 2 and a shaft 3 which are sleeved on the outside of the steel strand 1. One end of the anchor 2 is connected to the middle of the shaft 3, and both ends of the shaft 3 are movably connected to the base.

[0026] The diameter of the middle part of the shaft 3 is larger, and the diameters of the two ends are smaller; the base includes a bottom plate 6 and a pair of pads 4 arranged on the bottom plate 6, and the pads 4 are provided with U-shaped grooves that match the ends of the shaft 3. The outer sides of the two pads 4 are provided with baffles 5 for limiting the middle part of the shaft 3, and the baffles 5 are provided with holes that match the ends of the shaft 3. The anchor 2 and shaft 3 are provided with holes for passing the steel strand 1. There is a gap between the hole and the outer diameter of the steel strand 1, so that the steel strand 1 can move in the anchor 2 and shaft 3. The shaft 3 (such as Figure 4 , 5 The hole on the hole is a chamfered tapered hole 31 (as shown in Figure 6 shown).

[0027] The shaft in this embodiment is preferably made of alloy structural steel. Due to the different slopes of the mountains, the stress on the shaft will change. The alloy structural steel has a higher yield strength and high surface hardness, which can improve the reliability of the flexible bracket node.

[0028] The installation process of the above device is as follows:

[0029] One end of the steel strand 1 passes through the shaft 3, and the steel strand 1 is connected to the anchor 2. The two ends of the shaft 3 are embedded in the grooves of the cushion block 4. The outer side of the cushion block 4 is connected to the baffle 5 to limit the shaft 3 to ensure that the shaft 3 will not slip out of the cushion block 4. The bottom plate 6 is connected to the bottom of the cushion block 4 to form a complete connection shaft R. After the connection is completed, determine the slope of the mountain, rotate the shaft 3, adjust the angle of the steel strand 1 and the anchor 2 to be parallel to the mountain slope, and use special tools to tension the steel strand 1. After the pre-tension of the steel strand 1 is generated, the photovoltaic module P is laid on the top of the steel strand 1. After the installation is completed, Figure 7As shown, after being tensioned, the steel strand 1 is parallel to the mountain slope (the mountain slope forms an angle α with the horizontal plane).

Claims

1. A flexible photovoltaic support steel strand connecting shaft that can adapt to different slope changes in mountains, characterized in that: It comprises an anchor (2) and a shaft (3) which are sleeved on the outside of a steel strand (1); one end of the anchor (2) is connected to the middle of the shaft (3); and both ends of the shaft (3) are movably connected to a base.

2. The flexible photovoltaic support steel strand connecting shaft according to claim 1, characterized in that: The diameter of the middle part of the shaft (3) is larger, and the diameters of the two ends are smaller; the base comprises a bottom plate (6) and a pair of cushion blocks (4) arranged on the bottom plate (6), the cushion blocks (4) are provided with U-shaped grooves matching with the ends of the shaft (3), and baffles (5) for limiting the middle part of the shaft (3) are arranged on the outer sides of the two cushion blocks (4), and the baffles (5) are provided with holes matching with the ends of the shaft (3).

3. The flexible photovoltaic support steel strand connecting shaft according to claim 1, characterized in that: The anchor (2) and the shaft (3) are provided with a hole for passing the steel strand (1), and there is a gap between the hole and the outer diameter of the steel strand (1), so that the steel strand (1) can move inside the anchor (2) and the shaft (3).

4. The flexible photovoltaic support steel strand connecting shaft as claimed in claim 3, characterized in that: The hole on the shaft (3) is a chamfered tapered hole (31).

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