Flexible connecting device between floating type photovoltaic floater modules

Abstract

The invention relates to a flexible connecting device between floating type photovoltaic floater modules, which comprises a connecting rod, and the head end part of the connecting rod is connected with the tail end part of one photovoltaic floater module in a relative rotation manner along the vertical direction; the tail end part of the connecting rod is connected with an external connecting rod fixed at the head end of the other photovoltaic floater module through a lengthened hoop; the connecting rod is a composite rod piece with the inner portion being rigid and the outer portion being flexible and / or an elastic connecting structure capable of achieving axial and radial deformation is arranged between the tail end of the connecting rod and the head end of the external connecting rod. Through rotation of the single hinge at the head end, the bending moment load caused by relative rotation between the floater modules is reduced, so that the structural safety of the floatable photovoltaic device is improved; through stretching, compression and bending of the elastic connecting structure at the tail end, the load generated by relative movement of the floater modules on the horizontal plane is reduced; the inherent rigidity of the connecting device can reduce the relative rotation angle between the floater modules to a certain extent, and the overall stability of the floating photovoltaic device can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore photovoltaics, and in particular relates to a flexible connection device between floating photovoltaic buoy modules. Background Art

[0002] Compared with traditional ground-based photovoltaic power stations, offshore photovoltaic power stations have many significant advantages. First, since the reflected light from the water surface increases the light intensity received by the photovoltaic modules, the lighting conditions on the ocean are usually more favorable. Second, offshore photovoltaic power stations are not limited by land resources and can achieve large-scale photovoltaic power generation without occupying land. In addition, offshore photovoltaic power stations can also be combined with other marine industries such as wind power and aquaculture to achieve comprehensive resource utilization and maximize economic benefits.

[0003] Offshore photovoltaic power stations are composed of multiple photovoltaic floating modules, which are connected to each other through cables and connectors. In related technologies, each photovoltaic floating module is connected by a metal connector such as a hinge. This connection method may cause photovoltaic movement caused by wave action, which may cause structural fatigue damage to the metal connector. When each photovoltaic floating module is connected by a flexible rope, a large pre-tension must be set, which is provided by the photovoltaic mooring system, resulting in an increase in mooring costs. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a flexible connection device between floating photovoltaic float modules, which can improve the structural safety and overall stability of floating photovoltaics and has a simple structure and low cost.

[0005] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0006] A flexible connection device between floating photovoltaic float modules comprises a connecting rod, wherein the head end of the connecting rod is connected to the tail end of a photovoltaic float module in a relatively rotatable manner along the up and down direction; the tail end of the connecting rod is connected to an external connecting rod fixed to the head end of another photovoltaic float module through an extended clamp; the connecting rod adopts a composite rod member which is rigid inside and flexible outside and / or an elastic connection structure which can realize axial and radial deformation is arranged between the tail end of the connecting rod and the head end of the external connecting rod.

[0007] Moreover, the head end of the connecting rod adopts an arc end, and a radial through hole along the horizontal direction is arranged on the arc end; a hinge seat is fixedly installed at the tail end of a photovoltaic sub-module, and a mounting groove for the arc end of the connecting rod to be embedded is arranged on the hinge seat, and pin shaft holes are arranged on both sides of the mounting groove, and the pin shafts on both sides are aligned with the radial through holes at the head end of the connecting rod, and by installing the pin shaft, the head end of the connecting rod and the corresponding tail end of the photovoltaic sub-module can be relatively rotatably connected in the up and down directions.

[0008] Moreover, the composite rod is composed of an inner steel cable or a synthetic fiber cable and an outer nylon tube wrapped and fixed on the outside.

[0009] Moreover, two elastic sleeves are respectively arranged at both ends of the extended clamp; the extended clamp is respectively clamped and fixedly connected to the tail end of the connecting rod and the head end of the external connecting rod through the two elastic sleeves; a compression spring is installed between the two elastic sleeves in the extended clamp; the two elastic sleeves and the compression spring constitute the elastic connection structure.

[0010] Moreover, a full-length elastic sleeve is arranged in the extended clamp; it also includes a cylindrical joint composed of two halves, the outer diameter of the cylindrical joint is consistent with the outer diameter of the rear end of the connecting rod, a accommodating cavity is arranged in the cylindrical joint, and the rear end of the accommodating cavity is connected with the rear end of the cylindrical joint through a neck hole of a small diameter; the extended clamp is clamped and connected to the rear end of the connecting rod and the cylindrical joint through the full-length elastic sleeve, and a spacing is left between the rear end face of the connecting rod and the head end face of the cylindrical joint; the head end of the external connecting rod adopts a T-shaped head structure, the small diameter section of the T-shaped head is fitted with the neck hole on the cylindrical joint in a clearance fit manner, and the large diameter section of the T-shaped head extends into the accommodating cavity on the cylindrical joint, and a compression spring is installed at the head end of the large diameter section of the T-shaped head in the accommodating cavity, so that the external connecting rod and the cylindrical joint form an axial limit fit, and the full-length elastic sleeve, cylindrical joint, and compression spring constitute the elastic connection structure.

[0011] The advantages and positive effects of the present invention are:

[0012] The connection device of the present invention is different from the completely rigid or completely flexible connection between traditional float modules. Compared with the completely rigid connection, the connection device reduces the load generated by the relative movement between the float modules on the horizontal plane through the stretching, compression and bending of the elastic connection structure between the connecting rod body or the tail end of the connecting rod and the external connecting rod of the photovoltaic float module, and reduces the bending moment load caused by the relative rotation between the float modules through the rotation of the head end one-way hinge, thereby improving the structural safety of the floating photovoltaic. Compared with the completely flexible connection, the inherent rigidity of the connection device can reduce the relative rotation angle between the float modules to a certain extent, and improve the overall stability of the floating photovoltaic. The connection device balances the safety and stability of the floating photovoltaic, and has good overall hydrodynamic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the hinged connection between the photovoltaic float module and the first end of the connecting rod of the present invention;

[0014] Figure 2 It is a structural diagram of the first embodiment of the flexible connection device between floating photovoltaic float modules of the present invention;

[0015] Figure 3 yes Figure 2 A partial enlarged view of

[0016] Figure 4 It is a structural diagram of a second embodiment of a flexible connection device between floating photovoltaic float modules of the present invention;

[0017] Figure 5 yes Figure 4 A partial enlarged view of

[0018] Figure 6 It is a structural diagram of a third embodiment of a flexible connection device between floating photovoltaic float modules of the present invention;

[0019] Figure 7 yes Figure 6 A partial enlarged view of . DETAILED DESCRIPTION

[0020] The structure of the present invention is further described below with reference to the accompanying drawings and by way of examples. It should be noted that the present examples are descriptive rather than restrictive.

[0021] A flexible connection device between floating photovoltaic float modules, see Figure 1-Figure 7 The invention point is: it includes a connecting rod 4, the head end of the connecting rod is connected to the tail end of a photovoltaic float module 1 in a relatively rotatable manner along the up and down direction, see Figure 1 Specifically, the head end of the connecting rod adopts an arc end, and a radial through hole along the horizontal direction is arranged on the arc end. A hinge seat 2 is fixedly installed at the tail end of a photovoltaic sub-module, and a mounting groove for the arc end of the connecting rod to be embedded is arranged on the hinge seat. Pin shaft holes are arranged on both sides of the mounting groove. The pin shafts on both sides are aligned with the radial through hole at the head end of the connecting rod. By installing the pin shaft 3, the head end of the connecting rod and the tail end of the corresponding photovoltaic sub-module can be relatively rotatably connected in the up and down directions.

[0022] The tail end of the connecting rod is connected to the external connecting rod 7 fixed to the head end of another photovoltaic float module 6 through an extended clamp 5. In order to achieve the effect of flexible connection, in the present invention, a flexible buffering property is set on the connecting rod body or at the connection position between the connecting rod and the external connecting rod. Specifically, it can be achieved through the following three implementations:

[0023] Implementation method 1:

[0024] See also Figure 2The connecting rod is a composite rod, which is composed of an inner steel cable or synthetic fiber cable 4.2 and an outer nylon tube 4.1 wrapped and fixed on the outside. The outer nylon tube provides elastic support, while the steel cable or cable bears the tension. The steel cable or cable has a high tensile strength and can withstand great tension. The galvanized or other anti-corrosion treated steel cable or cable can resist environmental corrosion and has a long service life. The steel cable or cable can be bent and twisted to adapt to the relative rotation and displacement between floating photovoltaic float modules.

[0025] Embodiment 2: Two elastic sleeves 8 are respectively arranged at the two ends of the extended clamp. The elastic sleeves can be made of nylon sleeves or rubber sleeves. The extended clamp is respectively connected to the tail end of the connecting rod and the head end of the external rod by the two elastic sleeves. A compression spring 9 is installed between the two elastic sleeves in the extended clamp. Through the axial and radial deformation of the elastic sleeve and the deformation of the compression spring. Within a certain limit, it adapts to the relative rotation and displacement between the floating photovoltaic float modules. For example, when the two photovoltaic float modules are close to each other, the two spring sleeves will undergo axial deformation and the compression spring will undergo compression deformation to form an elastic buffer; when the two photovoltaic sub-modules are far away, the spring sleeves will mainly undergo axial deformation to form an elastic buffer. When the two photovoltaic float modules are offset, the elastic buffer is mainly formed by the radial deformation of the elastic sleeves at both ends.

[0026] When this embodiment is adopted, the connecting rod may be a rigid rod with anti-corrosion performance, a nylon rod or a composite rod.

[0027] Embodiment 3: A full-length elastic sleeve 10 is arranged in the extended clamp, and the full-length elastic sleeve can be a nylon sleeve or a rubber sleeve, and a cylindrical joint 11 composed of two halves is added. The outer diameter of the cylindrical joint is consistent with the outer diameter of the rear end of the connecting rod. A receiving cavity is arranged in the cylindrical joint, and the rear end of the receiving cavity is connected to the rear end of the cylindrical joint through a small-diameter neck hole. The extended clamp is fixedly connected to the rear end of the connecting rod and the cylindrical joint through the full-length elastic sleeve, and there is enough space between the rear end face of the connecting rod and the front end face of the cylindrical joint to meet the needs of relative displacement of the two photovoltaic floating modules. The head end of the external connecting rod adopts the T-shaped head 6.1 structure, and the small diameter section of the T-shaped head is fitted with the neck hole on the cylindrical joint in a clearance fit manner, and the large diameter section of the T-shaped head extends into the receiving cavity on the cylindrical joint. A compression spring 12 is installed at the head end of the receiving cavity located at the large diameter section of the T-shaped head, so that the external connecting rod and the cylindrical joint form an axial limit. In this embodiment, two sets of internal and external buffer mechanisms are arranged between the tail end of the connecting rod and the head end of the external connecting rod. Through the radial deformation and axial deformation of the full-length elastic sleeve and the axial deformation of the compression spring, a better buffering effect can be achieved when the floating photovoltaic float modules rotate and displace relative to each other.

[0028] When this embodiment is adopted, the connecting rod can be a rigid rod with anti-corrosion performance, a nylon rod or a composite rod.

[0029] The hinged seat installed at the tail end of the photovoltaic float module, the pin connecting the photovoltaic float module and the connecting rod, the pipe clamp and the external connecting rod fixed at the head end of the photovoltaic float module are all made of anti-corrosion metal parts, specifically, stainless steel materials, or ordinary steel with anti-corrosion treatment on the surface.

[0030] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A flexible connection device between floating photovoltaic float modules, characterized in that: It comprises a connecting rod, the head end of the connecting rod is connected to the tail end of a photovoltaic float module in a relatively rotatable manner along the up and down direction; the tail end of the connecting rod is connected to an external connecting rod fixed to the head end of another photovoltaic float module through an extended clamp; the connecting rod adopts a composite rod with inner rigidity and outer flexibility, and / or an elastic connection structure capable of realizing axial and radial deformation is arranged between the tail end of the connecting rod and the head end of the external connecting rod.

2. The flexible connection device between floating photovoltaic modules according to claim 1, characterized in that: The head end of the connecting rod adopts an arc end, and a radial through hole along the horizontal direction is arranged on the arc end; a hinge seat is fixedly installed at the tail end of a photovoltaic sub-module, and a mounting groove for the arc end of the connecting rod to be embedded is arranged on the hinge seat, and pin shaft holes are arranged on both sides of the mounting groove, and the pin shafts on both sides are aligned with the radial through holes at the head end of the connecting rod. By installing the pin shaft, the head end of the connecting rod and the corresponding tail end of the photovoltaic sub-module can be relatively rotatably connected in the up and down directions.

3. The flexible connection device between floating photovoltaic modules according to claim 1, characterized in that: The composite rod is composed of an inner steel cable or a synthetic fiber cable and an outer nylon tube wrapped and fixed on the outside.

4. The flexible connection device between floating photovoltaic modules according to claim 1, characterized in that: Two elastic sleeves are respectively arranged at the two ends of the extended clamp; the extended clamp is respectively clamped and fixedly connected to the tail end of the connecting rod and the head end of the external connecting rod through the two elastic sleeves; a compression spring is installed between the two elastic sleeves in the extended clamp; the two elastic sleeves and the compression spring constitute the elastic connection structure.

5. The flexible connection device between floating photovoltaic modules according to claim 1, characterized in that: A full-length elastic sleeve is arranged in the extended clamp; it also includes a cylindrical joint composed of two halves, the outer diameter of the cylindrical joint is consistent with the outer diameter of the rear end of the connecting rod, a accommodating cavity is arranged in the cylindrical joint, and the rear end of the accommodating cavity is connected with the rear end of the cylindrical joint through a neck hole of a small diameter; the extended clamp is clamped and connected to the rear end of the connecting rod and the cylindrical joint through the full-length elastic sleeve, and a spacing is left between the rear end face of the connecting rod and the head end face of the cylindrical joint; the head end of the external connecting rod adopts a T-shaped head structure, the small diameter section of the T-shaped head is fitted with the neck hole on the cylindrical joint in a clearance fit manner, and the large diameter section of the T-shaped head extends into the accommodating cavity on the cylindrical joint, and a compression spring is installed at the head end of the accommodating cavity located at the large diameter section of the T-shaped head, so that the external connecting rod and the cylindrical joint form an axial limit fit; the full-length elastic sleeve, cylindrical joint, and compression spring constitute the elastic connection structure.

Images