Automatic hydraulic flexible photovoltaic support prestress maintaining device

Abstract

The utility model provides a kind of automatic hydraulic type flexible photovoltaic support prestress maintaining device, including adjusting mechanism and hydraulic mechanism, adjusting mechanism and hydraulic mechanism are filled with hydraulic oil and are communicated by communicating hole between two, and hydraulic mechanism is connected flexible photovoltaic support prestress cable. The device generates stable and unchanging gravity G under the action of gravity, so that the pressure P of the hydraulic oil of entire system can keep constant. When prestress cable slackens and pressure drops, the hydraulic oil in adjusting cylinder enters pressure cylinder through communicating hole, and pushes hydraulic piston to tighten prestress cable, so that tension does not drop. When prestress cable is tense, the hydraulic oil in hydraulic cylinder enters adjusting cylinder through communicating hole, and pushes adjusting piston and connecting barrel, so that the pressure of hydraulic oil does not change, guaranteeing that the tension of cable does not rise, realizing prestress stability and ensuring the safety of photovoltaic support structure. The damping of adjusting structure can effectively reduce the occurrence of cable structure flutter.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic power generation technology, specifically relating to an automatic hydraulic flexible photovoltaic support prestress retention device. Background Technology

[0002] In the field of photovoltaic power generation technology, flexible photovoltaic (PV) supports are characterized by large spans, high clearance, and high utilization of the underlying space, making them widely used in mountainous areas, fishponds, tidal flats, and sewage treatment plants. The flexible PV support structure uses prestressed steel cables tensioned between two fixed points, utilizing the large deformation of the prestressed steel cables to resist the weight of the PV modules, wind, snow, and maintenance loads.

[0003] The internal forces of flexible photovoltaic (PV) support cables have a significant impact on the safety and stability of the support system. Therefore, strict limits on cable internal forces are necessary during the design phase, and it must be ensured that the internal forces do not change significantly throughout the entire operational phase. During long-term operation, factors such as temperature variations, support deformation, and creep of the side anchors can directly lead to cable slack or tension. Cable slack results in a decrease in internal forces, reducing the rigidity of the support system and increasing deformation under gravity or wind and snow forces, thus affecting structural safety. Cable tension increases internal forces, increasing the tensile force on the side anchors or directly, and in severe cases, can directly cause structural collapse.

[0004] In existing technologies, changes in cable slack or tension are difficult to observe visually and can only be checked manually periodically using specialized equipment. This method requires complex and expensive equipment and cannot continuously monitor and determine whether the internal force of the cable meets safety requirements. Therefore, a device that maintains stable internal force in the cable is essential to ensure the safety of flexible photovoltaic supports. Utility Model Content

[0005] The purpose of this invention is to provide an automatic hydraulic flexible photovoltaic support prestress retention device to solve the above-mentioned technical problems existing in the prior art.

[0006] Therefore, the technical solution provided by this utility model is as follows:

[0007] An automatic hydraulic flexible photovoltaic support prestress retention device includes an adjustment mechanism and a hydraulic mechanism. Both the adjustment mechanism and the hydraulic mechanism are filled with hydraulic oil and are connected by a connecting hole. The hydraulic mechanism is connected to the prestressed cable of the flexible photovoltaic support. The adjustment mechanism is used to adjust the amount of hydraulic oil in the hydraulic mechanism to keep the prestress of the prestressed cable of the flexible photovoltaic support constant.

[0008] Furthermore, the hydraulic mechanism includes a hydraulic cylinder, a hydraulic piston, and a hydraulic rod. One end of the hydraulic rod is connected to the hydraulic piston, and the other end of the hydraulic rod is connected to the prestressed cable of the flexible photovoltaic support through a prestressed cable anchor.

[0009] Furthermore, the adjustment mechanism includes an adjustment cylinder, an adjustment piston, and a pulling mechanism. The adjustment cylinder has an inner cylinder, the adjustment piston is located in the annular space between the adjustment cylinder and the inner cylinder, and the pulling mechanism is used to provide a downward pulling force.

[0010] Furthermore, the tensioning mechanism includes a connecting cylinder, a steel wire rope, and a basket. The connecting cylinder is located between the adjusting cylinder and the inner cylinder. One end of the connecting cylinder is fixedly connected to the adjusting piston, and the other end of the connecting cylinder is fixedly connected to a connecting plate. One end of the steel wire rope is connected to the connecting plate, and the other end passes through the inner cylinder and is connected to the basket. The basket contains weights.

[0011] Furthermore, it also includes an outer cylinder, in which the adjusting cylinder of the adjusting mechanism and the hydraulic cylinder of the hydraulic mechanism are both located and integrated. The top of the outer cylinder is provided with at least two vent holes that are respectively connected to the adjusting cylinder and the hydraulic cylinder.

[0012] Furthermore, the cross-sectional area of ​​the hydraulic cylinder is larger than that of the regulating cylinder.

[0013] Furthermore, the outer cylinder has holes, and a sliding device is fixed inside the holes. The steel wire is wound around the sliding device, and the steel wire coincides with the axis of the inner cylinder.

[0014] Furthermore, the connecting plate is a steel plate, and a lifting lug is provided in the middle of the lower end face of the steel plate. The steel wire rope is connected to the connecting plate through the lifting lug.

[0015] The beneficial effects of this utility model are as follows:

[0016] The automatic hydraulic flexible photovoltaic support prestressing retention device provided by this utility model adjusts the hydraulic oil volume in the hydraulic mechanism according to the change of prestress in the prestress of the flexible photovoltaic support prestressed cable, thereby ensuring the stability of the prestress of the flexible photovoltaic support prestressed cable, adjusting the damping of the structure, and effectively reducing the occurrence of cable structure flutter.

[0017] This flexible photovoltaic support prestressing retention device generates a stable gravity G under the action of gravity through a basket and weights, thereby keeping the hydraulic oil pressure P of the entire system constant. When the prestressing cable relaxes and the pressure drops, the hydraulic oil in the regulating cylinder enters the pressure cylinder through the connecting hole, pushing the hydraulic piston to tighten the prestressing cable and prevent the tension from decreasing. When the prestressing cable becomes tense and the tension increases, the hydraulic oil in the hydraulic cylinder enters the regulating cylinder through the connecting hole, pushing the regulating piston and the connecting cylinder to maintain a constant hydraulic oil pressure, ensuring that the tension of the prestressing cable does not increase, achieving prestress stability, and ensuring the safety of the photovoltaic support structure. Attached Figure Description

[0018] Figure 1 This is a longitudinal cross-sectional structural diagram of one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of one embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Outer cylinder; 2. Adjusting cylinder; 3. Hydraulic cylinder; 4. Hydraulic piston; 5. Connecting hole; 6. Hydraulic rod; 7. Hydraulic oil; 8. Inner cylinder; 9. Connecting cylinder; 10. Steel wire rope; 11. Adjusting piston; 12. Sealing ring; 13. Sliding device; 14. Suspended basket; 15. Weight; 16. Prestressed cable anchor; 17. Prestressed cable of flexible photovoltaic support; 18. Vent hole. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification.

[0023] Exemplary embodiments of the utility model are now described with reference to the accompanying drawings. However, the utility model can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the utility model and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments shown in the drawings is not intended to limit the utility model. In the drawings, the same units / elements are referred to by the same reference numerals.

[0024] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0025] Example 1

[0026] This utility model provides an automatic hydraulic flexible photovoltaic support prestress retention device, including an adjustment mechanism and a hydraulic mechanism. Both the adjustment mechanism and the hydraulic mechanism are filled with hydraulic oil 7 and are connected to each other through a connecting hole 5. The hydraulic mechanism is connected to the flexible photovoltaic support prestress cable 17. The adjustment mechanism is used to adjust the amount of hydraulic oil 7 in the hydraulic mechanism to keep the prestress of the flexible photovoltaic support prestress cable 17 constant.

[0027] The automatic hydraulic flexible photovoltaic support prestressing retention device provided by this utility model adjusts the amount of hydraulic oil 7 in the hydraulic mechanism according to the change of prestress of the prestress of the flexible photovoltaic support prestressed cable 17, thereby ensuring the stability of the prestress of the flexible photovoltaic support prestressed cable 17, adjusting the damping of the structure, and effectively reducing the occurrence of cable structure flutter.

[0028] Example 2

[0029] Based on Example 1, this example provides an automatic hydraulic flexible photovoltaic support prestress retention device, such as... Figure 1 and Figure 2 As shown, the hydraulic mechanism includes a hydraulic cylinder 3, a hydraulic piston 4, and a hydraulic rod 6. One end of the hydraulic rod 6 is connected to the hydraulic piston 4, and the other end of the hydraulic rod 6 is connected to the prestressed cable 17 of the flexible photovoltaic support through a prestressed cable anchor 16.

[0030] The hydraulic piston 4 is located inside the hydraulic cylinder 3 and can move up and down along the hydraulic cylinder 3. The hydraulic piston 4 is connected to the hydraulic rod 6. According to the relaxation or tension of the prestressed cable 17 of the flexible photovoltaic support, the hydraulic oil 7 enters the hydraulic cylinder 3 through the connecting hole 5 or is pressed into the adjustment mechanism, pushing the hydraulic cylinder 3 to move up or down, so that the prestress of the prestressed cable of the flexible photovoltaic support remains stable.

[0031] Example 3

[0032] Based on Embodiment 2, this embodiment provides an automatic hydraulic flexible photovoltaic support prestress retention device. The adjustment mechanism includes an adjustment cylinder 2, an adjustment piston 11, and a pulling mechanism. The adjustment cylinder is provided with an inner cylinder 8. The adjustment piston 11 is located in the annular space between the adjustment cylinder 2 and the inner cylinder 8. The pulling mechanism is used to provide downward pulling force.

[0033] like Figure 1 As shown, after the hydraulic oil 7 enters the regulating cylinder 2 through the connecting hole 5, the hydraulic oil 7 pushes the regulating piston 11 upward, thereby driving the pulling mechanism to move upward.

[0034] Example 4

[0035] Based on Embodiment 3, this embodiment provides an automatic hydraulic flexible photovoltaic support prestressing retention device. The tension mechanism includes a connecting cylinder 9, a steel wire cable 10, and a hanging basket 14. The connecting cylinder 9 is located between the adjusting cylinder 2 and the inner cylinder 8. One end of the connecting cylinder 9 is fixedly connected to the adjusting piston 11, and the other end of the connecting cylinder 9 is fixedly connected to a connecting plate. One end of the steel wire cable 10 is connected to the connecting plate, and the other end passes through the inner cylinder 8 and is connected to the hanging basket 14. A weight 15 is provided inside the hanging basket 14.

[0036] The device is installed on the prestressed cable. When the prestressed cable 17 of the flexible photovoltaic support (hereinafter referred to as the prestressed cable) becomes tense, such as... Figure 1 As shown, hydraulic oil 7 enters the annular space between the regulating cylinder 2 and the inner cylinder 8 through the connecting hole 5, thereby pushing the regulating piston 11 to move upward, driving the connecting cylinder 9 to move upward, and pulling the basket 14 equipped with weights 15 upward through the steel wire cable 10, keeping the pressure of hydraulic oil 7 constant and ensuring that the tension of the prestressed cable does not increase; similarly, when the prestressed cable 17 of the flexible photovoltaic support becomes loose, the basket 14 equipped with weights 15 pulls the steel wire cable 10 downward, pressing the hydraulic oil 7 between the regulating cylinder 2 and the inner cylinder 8 into the pressure cylinder through the connecting hole 5, pushing the hydraulic piston 4 to tighten the prestressed cable and keep the tension from decreasing.

[0037] Since gravity G remains constant, the pressure P of the hydraulic oil 7 in the entire system remains constant. When the prestressed cable slackens and the pressure drops, the hydraulic oil 7 in the regulating cylinder 2 enters the pressure cylinder through the connecting hole 5, pushing the hydraulic piston 4 to tighten the prestressed cable and prevent the tension from decreasing. When the prestressed cable becomes tense and the tension increases, the hydraulic oil 7 in the hydraulic cylinder 3 enters the regulating cylinder 2 through the connecting hole 5, pushing the regulating piston 11 and the connecting cylinder 9 to maintain the pressure of the hydraulic oil 7 constant, ensuring that the cable tension does not increase.

[0038] Because this device can adjust the tension of the cable in real time and can extend and retract in real time according to the tension, it has the function of adjusting damping and can effectively reduce the occurrence of cable structure flutter.

[0039] Example 5

[0040] Based on Example 4, this example provides an automatic hydraulic flexible photovoltaic support prestress retention device, such as... Figure 1 As shown, it also includes an outer cylinder 1. The adjusting cylinder 2 of the adjusting mechanism and the hydraulic cylinder 3 of the hydraulic mechanism are both located inside the outer cylinder 1 to form a whole. The top of the outer cylinder 1 is provided with at least two vent holes 18, which are respectively connected to the adjusting cylinder 2 and the hydraulic cylinder 3.

[0041] The hydraulic rod 6 is connected to the hydraulic piston 4 and the prestressed cable anchor 16 through the reserved through hole in the outer cylinder 1. The hydraulic oil 7 is distributed in the two cylinders (hydraulic cylinder 3 and adjusting cylinder 2) through the connecting hole 5, providing the same pressure to the hydraulic piston 4 and the adjusting piston 11, thus driving the movement of each piston.

[0042] Example 6

[0043] Based on Example 5, this example provides an automatic hydraulic flexible photovoltaic support prestress retention device, such as... Figure 2 As shown, the cross-sectional area of ​​the hydraulic cylinder 3 is larger than that of the adjusting cylinder 2.

[0044] The area A1 of the adjusting piston 11; the cross-sectional area A2 of the hydraulic cylinder 3 (excluding the area of ​​the hydraulic rod 6). A sealing ring 12 is provided at the connection between the adjusting piston 11 and the connecting cylinder 9, a sealing ring 12 is provided between the hydraulic piston and the hydraulic cylinder 3, and a sealing ring 12 is provided between the hydraulic rod 6 and the outer cylinder 1.

[0045] This device utilizes Pascal's principle. Since hydraulic oil 7 is incompressible, the pressure at all points on the hydraulic oil 7 is equal when subjected to external force. The basket 14 and the weights 15 generate a stable and constant gravity G under the influence of gravity. G is transmitted to the inner cylinder 8 and the adjusting piston 11 via the steel wire rope. The pressure generated inside the hydraulic oil 7 at this time is P = G / A1. The force acting on the hydraulic piston 4 through the hydraulic oil 7 is T = P * A2 = G * A2 / A1. This force T is the stable tension provided by the device to the prestressed cable. The cross-sectional area A2 of the hydraulic cylinder 3 is larger than that of the adjusting cylinder 2, therefore A2 > A1, providing a tension greater than G.

[0046] Example 7

[0047] Based on Embodiment 5, this embodiment provides an automatic hydraulic flexible photovoltaic support prestress retention device. The outer cylinder 1 has a hole, and a sliding device 13 is fixed in the hole. The steel wire rope 10 is wound on the sliding device 13, and the steel wire rope 10 coincides with the axis of the inner cylinder 8.

[0048] The sliding device 13 provides sliding support for the wire rope, reduces the friction between the wire rope and the outer cylinder 1, and keeps the wire rope in the middle position of the inner cylinder 8.

[0049] Both ends of the inner cylinder 8 have pre-drilled holes for the steel wire rope 10 to pass through.

[0050] Example 8

[0051] Based on Example 4, this example provides an automatic hydraulic flexible photovoltaic support prestress retention device. The connecting plate is a steel plate, and a lifting lug is provided in the middle of the lower end face of the steel plate. The steel wire cable 10 is connected to the connecting plate through the lifting lug.

[0052] The connecting cylinder 9 is made of a round tube, with one side welded to the adjusting piston 11 and the other side sealed with a steel plate. Lugs are pre-drilled on the steel plate, and the wire rope is fixed to the connecting cylinder 9 via these lugs.

[0053] This device ensures that the prestressed cables maintain a stable tension at all times. Furthermore, it can adjust the damping of the structure, effectively reducing flutter in the prestressed cable structure and ensuring its safety.

[0054] The examples above are merely illustrative of utility models and do not constitute a limitation on the scope of protection of utility models. All designs that are the same as or similar to utility models fall within the scope of protection of utility models.

Claims

1. An automatic hydraulic flexible photovoltaic support prestress retention device, characterized in that: It includes an adjustment mechanism and a hydraulic mechanism, both of which are filled with hydraulic oil and are connected by a connecting hole. The hydraulic mechanism is connected to the prestressed cable of the flexible photovoltaic support. The adjustment mechanism is used to adjust the amount of hydraulic oil in the hydraulic mechanism to keep the prestress of the prestressed cable of the flexible photovoltaic support constant.

2. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 1, characterized in that: The hydraulic mechanism includes a hydraulic cylinder, a hydraulic piston, and a hydraulic rod. One end of the hydraulic rod is connected to the hydraulic piston, and the other end of the hydraulic rod is connected to the prestressed cable of the flexible photovoltaic support through a prestressed cable anchor.

3. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 1, characterized in that: The adjustment mechanism includes an adjustment cylinder, an adjustment piston, and a pulling mechanism. The adjustment cylinder has an inner cylinder, the adjustment piston is located in the annular space between the adjustment cylinder and the inner cylinder, and the pulling mechanism is used to provide a downward pulling force.

4. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 3, characterized in that: The tensioning mechanism includes a connecting cylinder, a steel wire rope, and a basket. The connecting cylinder is located between the adjusting cylinder and the inner cylinder. One end of the connecting cylinder is fixedly connected to the adjusting piston, and the other end of the connecting cylinder is fixedly connected to a connecting plate. One end of the steel wire rope is connected to the connecting plate, and the other end passes through the inner cylinder and is connected to the basket. The basket contains weights.

5. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 4, characterized in that: It also includes an outer cylinder, and the adjusting cylinder of the adjusting mechanism and the hydraulic cylinder of the hydraulic mechanism are both located inside the outer cylinder to form a whole. The top of the outer cylinder is provided with at least two vent holes, which are respectively connected to the adjusting cylinder and the hydraulic cylinder.

6. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 5, characterized in that: The cross-sectional area of ​​the hydraulic cylinder is larger than that of the regulating cylinder.

7. The automatic hydraulic flexible photovoltaic support prestress retention device according to claim 5, characterized in that: The outer cylinder has a hole, and a sliding device is fixed inside the hole. The steel wire is wound around the sliding device, and the steel wire coincides with the axis of the inner cylinder.

8. An automatic hydraulic flexible photovoltaic support prestress retention device according to any one of claims 4-7, characterized in that: The connecting plate is a steel plate, and a lifting lug is provided in the middle of the lower end face of the steel plate. The steel wire rope is connected to the connecting plate through the lifting lug.

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