Polyurea anti-corrosion structure for offshore photovoltaic support node

Abstract

The utility model provides a polyurea anti-corrosion structure for an offshore photovoltaic support node, and relates to the technical field of photovoltaics. The structure comprises a bolt-sphere joint, a supporting rod and a polyurea anti-corrosion layer, the bolt-sphere joint comprises a sphere body and connecting parts, the sphere body is provided with a plurality of end faces in the circumferential direction, each end face is provided with one connecting part, and a first welding part is arranged between one end of each connecting part and the corresponding end face; the supporting rod is connected with the ball body through a connecting part, and a second welding part is arranged between the end of the supporting rod and the other end of the connecting part. The polyurea anti-corrosion layer covers the surface of the first welding part and the surface of the second welding part at the same time. According to the structure, the bolt-sphere joint and the supporting rod are connected through the first welding part and the second welding part, meanwhile, the surfaces of the first welding part and the second welding part are covered with the polyurea anti-corrosion layers, on one hand, the connecting strength between the supporting rod and the bolt-sphere joint is improved, and on the other hand, the anti-corrosion performance of the welding parts is improved; and the service life of the bracket is prolonged.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of photovoltaic technology, in particular to a polyurea anti-corrosion structure for a marine photovoltaic support node. BACKGROUND

[0002] Photovoltaic is a power generation system that converts solar radiation energy into electrical energy by using the photovoltaic effect of semiconductor materials. Photovoltaic energy is derived from solar energy, which is a clean, safe and renewable energy source. Therefore, photovoltaic power generation has good application prospects.

[0003] At present, most photovoltaic power generation systems are installed on land. However, due to the limited space on land and the influence of buildings or plants, the layout space of photovoltaic is relatively limited. Therefore, considering the efficiency of receiving solar energy and the layout space of photovoltaic, the sea surface becomes a better choice for photovoltaic installation. However, seawater has strong corrosive effect on the support structure of photovoltaic, especially on the connecting parts of various components in the support. These connecting parts are easily corroded by seawater, which may cause the support to break, reduce the strength and service life of the support, and even cause the support to be damaged, resulting in photovoltaic falling off.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0005] Therefore, a polyurea anti-corrosion structure for a marine photovoltaic support node is provided. The connection between different components in the support is achieved by a welding part, and a polyurea anti-corrosion layer is covered on the welding part to improve the corrosion resistance and service life of the support.

[0006] Other characteristics and advantages of the present disclosure will become apparent from the following detailed description, or will be learned by practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a polyurea anti-corrosion structure for a marine photovoltaic support node is provided, which is arranged at sea level and used to support photovoltaic components. The support includes:

[0008] A bolt ball node includes a ball body and a connecting part. The ball body has a plurality of end faces in the circumferential direction, and each end face is provided with a connecting part. The connecting part has a first welding part between one end and the end face.

[0009] A support rod is connected to the ball body through the connecting part, and the support rod has a second welding part between the end of the support rod and the other end of the connecting part.

[0010] a polyurea anticorrosive coating covering the surfaces of the first weld part and the second weld part simultaneously.

[0011] In an exemplary embodiment of the present disclosure, the polyurea anticorrosive coating comprises at least two stacked film layers in a direction perpendicular to the axis of the connecting part, each of the polyurea anticorrosive coating at least partially overlaps with the adjacent polyurea anticorrosive coating.

[0012] In an exemplary embodiment of the present disclosure, the thickness of each of the polyurea anticorrosive coating is 100-300 μm.

[0013] In an exemplary embodiment of the present disclosure, the polyurea anticorrosive coating comprises a first anticorrosive layer and a second anticorrosive layer, the first anticorrosive layer and the second anticorrosive layer do not overlap in a direction parallel to the axis of the connecting part, the first anticorrosive layer covers the surface of the first weld part, and the second anticorrosive layer covers the surface of the second weld part.

[0014] In an exemplary embodiment of the present disclosure, one end of the first anticorrosive layer overlaps the end surface of the bolted spherical joint, and / or the other end of the first anticorrosive layer overlaps the surface of the connecting part.

[0015] One end of the second anticorrosive layer overlaps the outer surface of the support rod, and / or the other end of the second anticorrosive layer overlaps the surface of the connecting part.

[0016] In an exemplary embodiment of the present disclosure, each of the polyurea anticorrosive coating is a one-time forming film layer, and the surface covered by each of the polyurea anticorrosive coating comprises the surface of the first weld part, the surface of the second weld part, and the outer surface of the connecting part.

[0017] In an exemplary embodiment of the present disclosure, one end of each of the polyurea anticorrosive coating overlaps the outer surface of the end of the support rod, and the other end of each of the polyurea anticorrosive coating overlaps the end surface of the bolted spherical joint.

[0018] In an exemplary embodiment of the present disclosure, the bracket further comprises a primer layer, which is arranged between the first weld part and / or the second weld part and the polyurea anticorrosive coating.

[0019] In an exemplary embodiment of the present disclosure, the support rod is screwed with the bolted spherical joint.

[0020] In an exemplary embodiment of the present disclosure, the support rod and the bolted spherical joint are made of metal.

[0021] The polyurea anti-corrosion structure for the offshore photovoltaic support node provided by the present disclosure connects the ball body and the connecting part of the bolt ball node through the first welding part, and connects the support rod and the connecting part through the second welding part. The first welding part and the second welding part can improve the connection strength between the support rod and the bolt ball node, and at the same time, the polyurea anti-corrosion layer is covered on the surface of the first welding part and the second welding part, so as to prevent the corrosion of seawater and other corrosive substances on the first welding part and the second welding part, improve the connection strength between the components, and further improve the strength and service life of the whole support.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the present disclosure, and together with the specification, serve to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0024] Figure 1 A structure schematic view of a polyurea anti-corrosion structure for an offshore photovoltaic support node in an exemplary embodiment of the present disclosure.

[0025] Figure 2 A partial structure schematic view of a polyurea anti-corrosion structure for an offshore photovoltaic support node in an exemplary embodiment of the present disclosure.

[0026] Figure 3 A partial structure schematic view of another polyurea anti-corrosion structure for an offshore photovoltaic support node in an exemplary embodiment of the present disclosure.

[0027] Figure 4 A structure schematic view of an offshore photovoltaic support in an exemplary embodiment of the present disclosure.

[0028] In the drawings, the reference signs are explained as follows:

[0029] 10, bolt ball node; 11, ball body; 12, connecting part; 20, support rod; 21, first welding part; 22, second welding part; 30, polyurea anti-corrosion layer; 31, first anti-corrosion layer; 32, second anti-corrosion layer; 40, primer layer; 100, support. DETAILED DESCRIPTION

[0030] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any of various forms, and are not limited to the implementations set forth in this document; rather, the implementations are provided as non-limiting examples so that this disclosure will be thorough and complete, and will fully convey the scope of the example implementations to those skilled in the art. Like reference numerals may be used to refer to like elements throughout and detailed descriptions of the like elements will not be repeated. Additionally, the drawings are schematic and are not necessarily drawn to scale.

[0031] Although relative terms such as "upper," "lower," may be used herein to describe one component's relationship to another component of a graphic icon, such terminology is used herein for convenience only and is not intended to limit the scope of the disclosure to only such orientations. It is to be understood that if the graphic icon were turned over such that the "upper" component would become the "lower" component, then such would be within the scope of the disclosure. When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure or that the structure is "directly" on the other structure or that the structure is "indirectly" on the other structure via another structure.

[0032] The terms "one," "a," "an," "the," and "said" are used to mean that "at least one" or "one or more" unless otherwise indicated; the terms "including," "includes," and "have" are used as synonymous for "including," "includes," and "having" at least the stated elements or components; the terms "first," "second," and "third," and the like, are used merely as labels, and are not intended to impose numerical requirements on their objects.

[0033] In the related art, since the photovoltaic is a device for converting solar energy into electric energy, the setting of the photovoltaic needs to be set according to the angle of the sun, so that the setting position of the photovoltaic has high requirements. Since it is easier to set the photovoltaic support structure on land, the current application of photovoltaic is mainly on land, and the corrosion factors of the photovoltaic support structure on land are less, and the corrosion prevention of the photovoltaic support structure only considers the land influencing factors.

[0034] But based on the limitation of land, the photovoltaic is now considered to be set on the sea surface to improve the efficiency of the photovoltaic, but due to the strong corrosiveness of seawater, the conventional corrosion prevention measures cannot meet the corrosion prevention requirements of the photovoltaic support structure on the sea surface, especially the connection gap between the connecting parts in the support structure, which makes the corrosion problem more serious, causes the connection between the parts to break, affects the overall strength and supporting effect of the support structure, and in severe cases, the support structure will be damaged.

[0035] At present, the connection between the support rod and the bolt ball joint in the support is usually fastened by bolts, and the connection is not treated. However, the connection of the support is a weak connection point and is easily eroded, which reduces the service life of the support.

[0036] It should be noted that the polyurea anti-corrosion structure for the offshore photovoltaic support node provided by the present disclosure is arranged on the sea level and is used to provide support and fixing effects for the photovoltaic assembly arranged on the sea surface. The photovoltaic assembly can include a plurality of photovoltaic panels, and the specific structure of each photovoltaic panel can be understood as a photovoltaic structure available in the art. The specific number of photovoltaic panels in the photovoltaic assembly can be adaptively selected and adjusted according to actual design needs. In addition, the polyurea anti-corrosion structure for the offshore photovoltaic support node is usually arranged above the sea level or most of the structure is arranged above the sea level to support the photovoltaic assembly. The fixing and support of the support on the sea level can usually be achieved by arranging a pile foundation, but the present disclosure is not limited thereto, and other structures can also be used to support and fix the support.

[0037] Based on this, the present disclosure provides a polyurea anti-corrosion structure for an offshore photovoltaic support node. The offshore photovoltaic support is arranged on the sea level and is used to support a photovoltaic assembly, as shown in Figure 1 , in combination with Figures 2 to 4 The structure includes a bolt ball joint 10, a support rod 20, and a polyurea anti-corrosion layer 30.

[0038] The bolt ball joint 10 includes a ball body 11 and a connecting part 12. The ball body 11 has a plurality of end faces in the circumferential direction, and each end face is provided with a connecting part 12. The connecting part 12 has a first welding part 21 between one end and the end face. The support rod 20 is connected to the ball body 11 through the connecting part 12, and the support rod 20 has a second welding part 22 between the end and the other end of the connecting part 12. The polyurea anti-corrosion layer 30 covers the surfaces of the first welding part 21 and the second welding part 22.

[0039] The polyurea corrosion-resistant structure for the offshore photovoltaic support node provided by the present disclosure forms a first welding portion 21 between the ball body 11 and the connecting portion 12 of the bolt ball node 10, forms a second welding portion 22 between the connecting portion 12 and the support rod 20, and covers the surface of the first welding portion 21 and the second welding portion 22 with a polyurea corrosion-resistant layer 30. On the one hand, the connection strength between the support rod 20 and the bolt ball node 10 can be improved by the first welding portion 21 and the second welding portion 22, and the overall strength of the support 100 is improved. On the other hand, the corrosion resistance of the first welding portion 21 and the second welding portion 22 is improved by covering the surface of the first welding portion 21 and the second welding portion 22 with the polyurea corrosion-resistant layer 30, so as to avoid the fracture phenomenon caused by the corrosion of external substances on the first welding portion 21 and the second welding portion 22, and further improve the service life of the support 100.

[0040] The various parts of the polyurea corrosion-resistant structure for the offshore photovoltaic support node provided by the present disclosure will be described in detail below in combination with the drawings:

[0041] In the embodiments provided by the present disclosure, as shown in Figure 1 , in combination Figure 4 , the support 100 includes a bolt ball node 10, the bolt ball node 10 includes a ball body 11 and a connecting portion 12, the ball body 11 has a plurality of end faces in the circumferential direction, and each end face is provided with a connecting portion 12. The connecting portion 12 has a first welding portion 21 between one end and the end face.

[0042] The ball body 11 of the bolt ball node can be spherical or spherical, which can be a spherical body or a spherical body made of metal, such as a steel ball, etc. A plurality of end faces can be provided on the outer surface of the ball body 11, each end face is a plane, i.e. a plane contact surface, so as to be connected with the subsequent components, increase the contact area of the ball body 11 and the end face of the other components, and thus improve the connection reliability. Of course, the surface area and surface shape of the plurality of end faces can be the same or different, and can be designed and selected according to the corresponding components connected by each end face, but in order to facilitate the process manufacturing, the surface area and surface shape of the plurality of end faces on the same ball body 11 are usually the same or substantially the same. In addition, each end face is provided with a threaded hole, and the connecting portion 12 is connected through the corresponding threaded hole, so as to realize the connection between the connecting portion 12 and the ball body 11.

[0043] The bolt ball node 10 provided by the present disclosure further includes a connecting portion 12, which can include other parts having a connecting function in addition to the ball body 11, such as a plurality of parts such as bolts, sleeves and tapered heads matched with the ball body 11.

[0044] In the present disclosure, the ball body 11 and the connecting part 12 constitute the overall structure of the bolt ball joint 10. The connecting principle of the bolt ball joint 10 is that the conical head or the sealing plate provided with the bolt is welded at both ends of the support rod 20, the long hexagonal sleeve (or other parts with the same function) is sleeved on the screw rod protruding from the conical head or the sealing plate, and the bolt and the sleeve are connected together by the pin or the fastening screw. When assembling, the long hexagonal sleeve is directly screwed, the bolt is driven to rotate through the pin or the fastening screw, so that the bolt is screwed into the ball, until the bolt head is tightly attached to the sealing plate or the conical head. After each intersection support rod 20 is connected in this way, the joint is formed, and the tightening degree of the bolt is controlled by the pin. Of course, the connecting part 12 provided by the present disclosure can include each part in the above principle or the corresponding adaptively deformed part. The above connecting principle is only illustrative, and there can be other corresponding connecting methods for deformed parts, which should be understood as being within the protection scope of the present disclosure.

[0045] The support 100 provided by the present disclosure can include a plurality of bolt ball joints 10 and a plurality of support rods 20. Each bolt ball joint 10 can connect a plurality of support rods 20. The end portions of the plurality of support rods 20 are connected to the bolt ball joint 10, and the plurality of support rods 20 extend in a radial state away from the bolt ball joint 10. By setting the positions of the plurality of support rods 20, a support 100 having a supporting effect on the photovoltaic module can be formed. The number and position of the support rods 20 and the bolt ball joint 10 can be set and adaptively adjusted according to the actual design requirements of the structure of the support 100 to meet the supporting requirements of the photovoltaic module.

[0046] The support rod 20 can be made of metal, such as a steel pipe, a copper pipe, an aluminum pipe, a titanium alloy pipe, etc. Of course, the support member can also be made of a metal pipe with a coating or a plating layer to improve the corrosion resistance and durability of the support member. In the present disclosure, the plurality of support rods 20 can be made of the same material, such as steel. Different metal materials can also be selected according to the contact condition with seawater.

[0047] The support rod 20 is screwed to the bolt ball joint 10. As described in the above embodiment regarding the connection principle of the bolt ball joint 10, the support rod 20 can be connected to the bolt ball joint 10 via the connecting part 12, which includes a bolt. However, the inventors have discovered that gaps or crevices exist in both the connection between the support rod 20 and the connecting part 12, and the connection between the connecting part 12 and the bolt ball joint 10. During the subsequent use of the support 100, these gaps or crevices are prone to allow corrosive or erosive substances, such as seawater, to seep in. Under the influence of these substances, the connecting part 12 is highly susceptible to corrosion, which can lead to damage or even collapse of the entire support 100. Therefore, for weak and easily corroded parts such as the connecting part 12 in the support 100, it is necessary to further improve their corrosion resistance.

[0048] Therefore, as Figures 1 to 3 As shown, in order to improve the connection strength of each component in the bracket 100, a first weld 21 is formed between one end of the connecting part 12 and the end face of the ball body 11, and a second weld 22 is formed between the end of the support rod 20 and the other end of the connecting part 12.

[0049] In the process of forming the first welded part 21 or the second welded part 22, a step-by-step welding method or a one-time welding method can be adopted. The specific forming process can be selected and adjusted according to the process requirements. It should be noted that the first welded part 21 needs to fill the gap between the main body 11 of the ball and the connecting part 12, and the second welded part 22 needs to fill the gap between the connecting part 12 and the support rod 20. The welding strength of the first welded part 21 and the second welded part 22 must at least meet the support requirements of the bracket 100 for the photovoltaic module. In addition, in this disclosure, in order to improve the strength of the first welded part 21 and the second welded part 22, it is necessary to eliminate defects such as pores, bubbles or fractures inside the welded part during the welding process to improve the functionality of the welded part.

[0050] The first welding part 21 and the second welding part 22 can be arranged in a ring or a near-ring shape with the axis of the connecting part 12 as the center. Of course, the first welding part 21 and the second welding part 22 can be adapted to the specific structure of the bolt ball joint 10 and the support rod 20 to meet the structural requirements of the bracket 100.

[0051] In this disclosure, by providing a first welding part 21 between the ball body 11 and the connecting part 12, and providing a second welding part 22 between the support rod 20 and the connecting part 12, the overall structural strength of the bracket 100 can be improved. On the other hand, the first welding part 21 and the second welding part 22 can also prevent external substances from entering the component connection, so as to corrode each component and damage the structure of the bracket 100.

[0052] In the embodiments provided in the present disclosure, in order to further improve the corrosion resistance of the first welding part 21 and the second welding part 22, the bracket 100 further comprises a polyurea corrosion-resistant layer 30, which covers the surfaces of the first welding part 21 and the second welding part 22.

[0053] The polyurea corrosion-resistant layer 30 can be a film layer formed by pure polyurea or a film layer formed by semi-polyurea, and the specific type can be selected and adjusted according to the corrosion resistance requirement.

[0054] In order to further improve the adhesion between the welding part and the polyurea corrosion-resistant layer 30 and improve the protection of the welding part by the polyurea corrosion-resistant layer 30, the surface of the welding part can be polished before the polyurea corrosion-resistant layer 30 is covered, so as to improve the smoothness of the surface of the welding part and further improve the adhesion between the welding part and the polyurea corrosion-resistant layer 30. In addition, before the polyurea corrosion-resistant layer 30 is covered on the welding part, clean compressed air can be used to blow the sealing part, so as to remove pollutants such as dust and abrasives from the surface of the welding part, thereby forming a welding part with good surface cleanliness, so as to provide a basis for forming a uniform polyurea corrosion-resistant layer 30 on the surface of the welding part.

[0055] In addition, in order to improve the adhesion time and adhesion force of the polyurea corrosion-resistant layer 30 on the welding part and improve the integrity and service life of the polyurea corrosion-resistant layer 30, the bracket 100 further comprises a primer layer 40, which is arranged between the first welding part 21 and / or the second welding part 22 and the polyurea corrosion-resistant layer 30. Figure 2 The primer layer 40 can be one or more of epoxy resin, polyurethane, epoxy-modified polyurethane, polyurethane-modified epoxy resin, polyester-modified polyurethane, acrylic-modified polyurethane or polyamide-modified polyurethane, and the thickness of the primer layer 40 can be 40-60 microns. The specific type and thickness of the primer layer 40 can be selected and adjusted adaptively according to the polyurea corrosion-resistant layer 30 and the corrosion resistance requirement of the bracket 100.

[0056] In the axial direction perpendicular to the connecting part 12, the polyurea corrosion-resistant layer 30 comprises at least two stacked film layers, and each polyurea corrosion-resistant layer 30 at least partially overlaps with the adjacent polyurea corrosion-resistant layer 30. Specifically, when the polyurea corrosion-resistant layer 30 is a multi-layer structure, each polyurea corrosion-resistant layer 30 can be arranged to completely coincide with the adjacent polyurea corrosion-resistant layer 30, i.e. the multi-layer polyurea corrosion-resistant layer 30 is a structure of layer-by-layer stacking, and the shape and area of the cross section of each polyurea corrosion-resistant layer 30 in the axial direction parallel to the connecting part 12 are the same; or each polyurea corrosion-resistant layer 30 can have a partially coinciding area with the adjacent polyurea corrosion-resistant layer 30. The number of layers of the polyurea corrosion-resistant layer 30 and the coinciding area of the adjacent two polyurea corrosion-resistant layers 30 can be selected and adjusted according to the actual use or design requirement.

[0057] For example, for parts with high anticorrosion performance requirements, in order to improve the anticorrosion performance, a multilayer and completely overlapped polyurea anticorrosion layer 30 can be used; for parts with low anticorrosion performance requirements, in order to facilitate process saving, a polyurea anticorrosion layer 30 with fewer layers and with partial overlap can be used. Between the formation of adjacent two layers of polyurea anticorrosion layer 30, drying and cleaning steps can also be included to ensure the bonding strength and durability between the adjacent two layers of polyurea anticorrosion layer 30, and prevent the occurrence of bonding defects to cause film peeling.

[0058] In the present disclosure, the thickness of each layer of polyurea anticorrosion layer 30 can be 100 μm to 300 μm, for example, it can be 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm or 300 μm, etc. The thickness of the multilayer polyurea anticorrosion layer 30 can be the same or different, and the thickness of the polyurea anticorrosion layer 30 at different parts can be the same or different. In some embodiments, in order to facilitate process saving, the same thickness can be selected for the multilayer polyurea anticorrosion layer 30 at the same part, but it is not specifically limited.

[0059] The polyurea anticorrosion layer 30 can be formed by spraying process, of course, other processes such as veneering or casting can also be used.

[0060] In one embodiment provided in the present disclosure, as shown in Figure 3 the polyurea anticorrosion layer 30 is a split film layer, that is, in the direction parallel to the axis of the connecting part 12, the polyurea anticorrosion layer 30 includes a first anticorrosion layer 31 and a second anticorrosion layer 32, the first anticorrosion layer 31 and the second anticorrosion layer 32 do not overlap, the first anticorrosion layer 31 covers the surface of the first welding part 21, and the second anticorrosion layer 32 covers the surface of the second welding part 22.

[0061] In the direction perpendicular to the axis of the connecting part 12, the first anticorrosion layer 31 can be a multilayer structure, and the second anticorrosion layer 32 can be a multilayer structure and within the first anticorrosion layer 31 or the second anticorrosion layer 32, each layer of polyurea anticorrosion layer 30 at least partially overlaps with the adjacent polyurea anticorrosion layer 30, and the internal film layer of the first anticorrosion layer 31 or the second anticorrosion layer 32 is provided as the first anticorrosion layer 31 and the second anticorrosion layer 32 shown in the above embodiments, Figure 3 as shown in Figure 3 although the boundary of the multilayer structure is not shown in

[0062] In the present disclosure, the two side edges of the first anticorrosion layer 31 can be flush with the two side edges of the first welding portion 21 respectively, and the two side edges of the second anticorrosion layer 32 can be flush with the two side edges of the second welding portion 22 respectively; or one end of the first anticorrosion layer 31 can be overlapped on the end surface of the bolted spherical joint 10, or the other end can be overlapped on the outer surface of the connecting portion 12, one end of the second anticorrosion layer 32 can be overlapped on the outer surface of the support rod 20, or the other end can be overlapped on the outer surface of the connecting portion 12; or one end of the first anticorrosion layer 31 can be overlapped on the end surface of the bolted spherical joint 10, and the other end can be overlapped on the outer surface of the connecting portion 12, one end of the second anticorrosion layer 32 can be overlapped on the outer surface of the support rod 20, and the other end can be overlapped on the outer surface of the connecting portion 12, that is, after the first anticorrosion layer 31 completely covers the surface of the first welding portion 21, it continues to extend outward, and after the second anticorrosion layer 32 completely covers the surface of the second welding portion 22, it continues to extend outward, preventing corrosive substances from entering the interior of the first welding portion 21 and the second welding portion 22 through the edge position, thereby causing corrosion damage to the first welding portion 21 and the second welding portion 22.

[0063] The first anticorrosion layer 31 and the second anticorrosion layer 32 can both be formed by spraying. The number of the first anticorrosion layer 31 or the second anticorrosion layer 32 can be one layer or multiple layers, and when the number of the first anticorrosion layer 31 or the second anticorrosion layer 32 is multiple layers, the first anticorrosion layer 31 or the second anticorrosion layer 32 can be covered on the surface of the first welding portion 21 or the second welding portion 22 by layer-by-layer spraying. Among them, in order to ensure the adhesion between each anticorrosion layer and the adjacent anticorrosion layer, the surface of the anticorrosion layer can be dried and purged each time it is sprayed to ensure the cleanliness of the anticorrosion layer, thereby improving the adhesion between the adjacent anticorrosion layers. In addition, by providing a primer layer 40 near the surface of the welding portion, the anticorrosion layer can also form a close fit with the surface of the welding layer, that is, there is no fit defect such as bubbles between the two surfaces, so as to improve the fit of the anticorrosion layer on the welding portion, avoid the first anticorrosion layer 31 and the second anticorrosion layer 32 from peeling off, and at the same time improve the protection of the first anticorrosion layer 31 and the second anticorrosion layer 32 on the first welding portion 21 and the second welding portion 22.

[0064] In the present disclosure, the polyurea anticorrosive layer 30 is in a split film layer, which can cover different welding parts respectively, and can adapt to the anticorrosive requirements of different parts of the support 100. For example, the anticorrosive of the part close to the sea level or located in the sea can be improved by increasing the number of layers of the polyurea anticorrosive layer 30 to improve the sealing and anticorrosive performance of the part. For the part with less anticorrosive requirement, the polyurea anticorrosive layer 30 with less number of layers can be appropriately used to save the process and reduce the anticorrosive cost. In addition, when the anticorrosive of the different welding parts is damaged, the damaged part of the film layer can be repaired, and the polyurea anticorrosive layer 30 does not need to be replaced as a whole, which reduces the difficulty of anticorrosive repair, improves the efficiency and effect of anticorrosive repair.

[0065] In another embodiment provided in the present disclosure, each layer of the polyurea anticorrosive layer 30 is an integrally formed film layer, and the outer surface of each layer of the polyurea anticorrosive layer 30 covers the surface of the first welding part 21, the surface of the second welding part 22 and the outer surface of the connecting part 12.

[0066] When the polyurea anticorrosive layer 30 is a multi-layer film layer, in order to ensure the adhesion between each layer of the polyurea anticorrosive layer 30 and the adjacent polyurea anticorrosive layer 30, the air or bubbles between the layers can be discharged during each spraying to ensure the adhesion of the polyurea anticorrosive layer 30 itself. In addition, the layer of the polyurea anticorrosive layer 30 close to the surface of the welding part can also be tightly adhered to the surface of the welding part through the primer layer 40 to improve the adhesion of each layer of the polyurea anticorrosive layer 30 on the welding part, and the protection of the polyurea anticorrosive layer 30 on the sealing part is improved, which avoids the phenomenon of peeling of the polyurea anticorrosive layer 30 during long-term use.

[0067] In the present disclosure, the two side edges of the polyurea anticorrosive layer 30 can be flush with the edge of the first welding part 21 away from the connecting part 12 and the edge of the second welding part 22 away from the connecting part 12, respectively, or one end of the polyurea anticorrosive layer 30 can be overlapped on the outer surface of the end of the support rod 20, and the other end of the polyurea anticorrosive layer 30 can be overlapped on the end surface of the bolt ball joint 10, that is, the polyurea anticorrosive layer 30 can continue to extend outward after completely covering the first welding part 21 and the second welding part 22, so as to prevent corrosive substances from entering the inside of the sealing part through the connection between the polyurea anticorrosive layer 30 and the welding part, thereby causing corrosion damage to the welding part.

[0068] In the embodiment provided in the present disclosure, the support 100 can further include a topcoat layer, which is not shown in the figure. The topcoat layer can be arranged on the surface of the polyurea anticorrosive layer 30, and the topcoat layer can form a protective effect on the polyurea anticorrosive layer 30, thereby prolonging the service life of the polyurea anticorrosive layer 30. The topcoat layer can be an aliphatic polyurethane topcoat with high weather resistance, and the thickness thereof can be 70 μm to 90 μm. The arrangement of the topcoat layer can be selected according to the actual anticorrosive requirement, which is not limited in the present disclosure.

[0069] The polyurea anti-corrosion structure for the offshore photovoltaic support node provided by the present disclosure forms a first welding portion 21 between the ball body 11 and the connecting portion 12 of the bolt ball node 10, forms a second welding portion 22 between the connecting portion 12 and the support rod 20, and covers the surface of the first welding portion 21 and the second welding portion 22 with a polyurea anti-corrosion layer 30. On the one hand, the connection strength between the support rod 20 and the bolt ball node 10 can be improved by the first welding portion 21 and the second welding portion 22, and the overall strength of the support 100 is improved. On the other hand, the anti-corrosion performance of the first welding portion 21 and the second welding portion 22 is improved by covering the surface of the first welding portion 21 and the second welding portion 22 with the polyurea anti-corrosion layer 30, so as to avoid the fracture phenomenon caused by the corrosion of external substances on the first welding portion 21 and the second welding portion 22, and further improve the service life of the support 100.

[0070] Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specification and practice of the present disclosure. The present application is intended to cover any variations, uses, or adaptations of the present disclosure following the general principles thereof and including such departures from the present disclosure that come within known, accepted, and customary practice in the art to which the present disclosure pertains. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A polyurea corrosion protection structure for a node of an offshore photovoltaic support, the offshore photovoltaic support being disposed at sea level for supporting photovoltaic modules, characterized in that, The bracket comprises: a bolt ball joint comprising a ball body and a connecting part, the ball body having a plurality of end faces in the circumferential direction, each of the end faces being provided with the connecting part, the connecting part having a first welding part between one end and the end face; a support rod connected with the ball body through the connecting part, the support rod having a second welding part between the other end of the connecting part and the end of the support rod; a polyurea anticorrosive coating covering the surfaces of the first welding part and the second welding part.

2. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 1, characterized in that, In the direction perpendicular to the axis of the connecting part, the polyurea anticorrosive coating comprises at least two stacked film layers, each of the polyurea anticorrosive coating at least partially overlaps with the adjacent polyurea anticorrosive coating.

3. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 2, characterized in that, The thickness of each of the polyurea anticorrosive coating is 100-300 μm.

4. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 1, characterized in that, The polyurea anticorrosive coating comprises a first anticorrosive layer and a second anticorrosive layer, the first anticorrosive layer and the second anticorrosive layer do not overlap in the direction parallel to the axis of the connecting part, the first anticorrosive layer covers the surface of the first welding part, and the second anticorrosive layer covers the surface of the second welding part.

5. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 4, characterized in that, One end of the first anticorrosive layer overlaps the end face of the bolt ball joint, and / or the other end of the first anticorrosive layer overlaps the surface of the connecting part; One end of the second anticorrosive layer overlaps the outer surface of the support rod, and / or the other end of the second anticorrosive layer overlaps the surface of the connecting part.

6. The polyurea corrosion protection structure for offshore photovoltaic support nodes according to claim 2, characterized in that, Each of the polyurea anticorrosive coating is a one-time forming film layer, and the surface covered by each of the polyurea anticorrosive coating comprises the surface of the first welding part, the surface of the second welding part and the outer surface of the connecting part.

7. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 6, characterized by the fact that, One end of each of the polyurea anticorrosive coating overlaps the outer surface of the end of the support rod, and the other end of each of the polyurea anticorrosive coating overlaps the end face of the bolt ball joint.

8. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 1, characterized by the fact that, The bracket further comprises a primer layer arranged between the first welding part and / or the second welding part and the polyurea anticorrosive coating.

9. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to any of claims 1-8, characterized in that, The support rod is screwed with the bolt ball joint.

10. Polyurea anti-corrosion structure for offshore photovoltaic support nodes according to claim 9, characterized by the fact that, The support rod and the bolt ball joint are made of metal.

Images