Marine photovoltaic bolt-sphere grid structure adopting coating type corrosion prevention

Abstract

The utility model relates to an offshore photovoltaic bolt-sphere grid structure adopting coating type corrosion prevention. The grid structure comprises a bolt ball, a rod piece, a sleeve and a fixing bolt, the outer diameter of the sleeve is smaller than the outer diameter of the first end face, facing the bolt ball, of the rod piece, the bolt ball and the rod piece are fixedly connected through the fixing bolt, and the sleeve is fastened between the bolt ball and the rod piece; the anti-corrosion structure comprises sealing mud structures and petrolatum belt structures, the sealing mud structures are arranged at the two ends of the sleeve respectively, the petrolatum belt structures wind and fill gaps formed by the bolt balls, the sealing mud structures and the rod pieces, and the outer diameter of the sealing mud structures is not larger than that of the first end face; the outer diameter of the petrolatum belt structure is not smaller than that of the first end face. The sealing mud structure blocks joint gaps, the petrolatum belt structure forms a continuous protection layer, corrosion media in the marine environment are prevented from permeating, the joint area is fully covered, the quality problem caused by corrosion is reduced, and safe and stable operation of a project is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore photovoltaic technical field, concretely relates to a kind of offshore photovoltaic bolt ball net rack structure using cladding anticorrosion. BACKGROUND

[0002] At present, bolt ball net rack structure is widely used in offshore photovoltaic project. Figure 1 As shown in the figure, bolt ball net rack structure includes bolt ball 1, multiple bar members 2 distributed around bolt ball and fixing bolt 3, sleeve 3 is arranged between bolt ball 1 and bar member 2, while the inside of bar member 2 is hollow, fixing bolt 3 passes through bar member 2, sleeve 4 from inside to outside and is threadedly connected on the corresponding threaded hole of bolt ball 1, to form bolt ball net rack structure.

[0003] However, in offshore environment, the salinity of seawater, humidity, sea wave impact and various corrosive factors in marine atmosphere, the corrosion rate of metal structure is much higher than that in land environment, offshore photovoltaic bolt ball net rack structure faces harsh corrosion conditions.

[0004] In existing bolt ball net rack structure, the node where bar member is connected with bolt ball lacks protection measures, and bolt ball node is easily oxidized and corroded due to connection gap and stress deformation, which reduces the connection strength of bolt ball and bar member, and further affects the overall stability of bolt ball net rack structure, seriously threatening the safe and stable operation of offshore photovoltaic project. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of offshore photovoltaic bolt ball net rack structure using cladding anticorrosion, sealing mud structure blocks node gap, mineral grease belt structure forms continuous protective layer, avoids that marine environment corrosive medium penetrates, covers node area comprehensively, reduces the quality problem caused by corrosion, ensures the safe and stable operation of project.

[0006] For the above technical problems, the technical scheme provided by the utility model is a kind of offshore photovoltaic bolt ball net rack structure using cladding anticorrosion, including bolt ball, bar member, sleeve and fixing bolt, the outer diameter of sleeve is less than the outer diameter of the first end face of bar member towards bolt ball, and fixing bolt is fixedly connected with bolt ball and bar member, and sleeve is fastened between bolt ball and bar member;It also includes anticorrosion structure, the anticorrosion structure includes sealing mud structure and mineral grease belt structure, a group of sealing mud structure is respectively arranged at both ends of sleeve, and mineral grease belt structure is wound to fill the gap formed by bolt ball, sealing mud structure and bar member, the outer diameter of sealing mud structure is not greater than the outer diameter of first end face, and the outer diameter of mineral grease belt structure is not less than the outer diameter of first end face.

[0007] Further, the bolt ball and the opposite end of the rod are respectively provided with counterbores extending in opposite directions, and the opposite ends of the two groups of sealing mud structures are respectively deeply filled and sealed in the corresponding counterbores.

[0008] Further, the two ends of the sleeve are respectively deeply filled in the corresponding counterbores, and a sealing element is arranged between the end face of the sleeve and the corresponding counterbore.

[0009] Further, the petrolatum tape structure extends to the peripheral surface of the bolt ball and is chamfered between the peripheral surface of the bolt ball and the petrolatum tape structure towards the end of the bolt ball.

[0010] Further, the outer diameter of the petrolatum tape structure gradually decreases in the direction from the bolt ball to the rod, and the end of the petrolatum tape structure towards the rod is smoothly transitioned with the outer periphery of the rod.

[0011] Further, the sealing mud structure comprises a light mastic made of a mixture of hydrocarbons and small-particle porous polymers.

[0012] Further, the petrolatum tape structure comprises a non-woven fabric carrier and a petrolatum tape primer impregnated on the non-woven fabric carrier.

[0013] Further, the petrolatum tape primer is petroleum grease.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] (1) By additionally arranging the corrosion prevention structure comprising the sealing mud structure and the petrolatum tape structure in the bolt ball net rack structure, the problem of lack of protection at the node of the existing structure is effectively solved. The sealing mud structure is arranged at the two ends of the sleeve, can fill the joint gaps between the sleeve and the rod and the sleeve and the bolt ball, and blocks the penetration of corrosive media such as seawater, moisture and salt mist from the connection between the sleeve and the rod and the bolt ball. The petrolatum tape structure is wound and filled in the related gaps and has an outer diameter not less than the outer diameter of the first end face of the rod, forms a continuous protection layer, fully covers the node area, significantly reduces the risk of decrease in the connection strength of the bolt ball and the rod caused by corrosion, and at the same time, the corrosion prevention structure as a whole can be used as a buffer layer to prevent the easily damaged steel structure from being impacted and damaged, effectively guarantees the stability of the entire net rack structure in the harsh marine environment, and ensures the safe and stable operation of the offshore photovoltaic project.

[0016] (2) The counterbores are arranged at the opposite ends of the bolt ball and the rod, and the sealing mud structure is deeply filled therein, which increases the action range and sealing depth of the sealing mud, can more effectively prevent the accumulation and penetration of corrosive substances in the node, increases the sealing path, especially in the face of harsh conditions such as wave impact and high humidity air, can maintain the sealing state for a long time, further improves the corrosion resistance of the node, reduces the maintenance frequency and cost, and prolongs the service life of the net rack structure.

[0017] (3) The sleeve is deeply inserted into the counterbore and a sealing element is arranged, which strengthens the connection and sealing between the sleeve and the bolt ball and the rod, effectively prevents the corrosive medium from entering from the connection between the sleeve and the counterbore, and enhances the structural stability of the whole connection node, avoids the loosening of the connection caused by seawater and other factors, ensures the reliability of the bolt ball net rack structure in the complex environment at sea, and enables the structure to withstand greater external force without safety hazards caused by node corrosion and sealing failure.

[0018] (4) The petrolatum strip structure extends to the peripheral surface of the bolt ball and is chamfered, so that the transition between the protective layer and the surface of the bolt ball is smoother and more natural. The accumulation and retention of seawater on the protective surface can be reduced, the corrosion caused by local water accumulation can be avoided, the risk of damage to the protective layer when the surface is unevenly impacted by waves or marine floating objects is reduced, the durability and reliability of the whole anti-corrosion structure are improved, and the node part of the bolt ball net rack structure is better protected.

[0019] (5) The outer diameter of the petrolatum strip structure gradually decreases from the bolt ball to the rod and is smoothly transitioned to the outer periphery of the rod, which ensures that there is enough protective thickness and strength at the key connection part (near the bolt ball) and smoothly transitions to the connection end of the rod without affecting the overall structure and appearance of the rod. At the same time, the smooth transition design of the outer periphery of the rod can reduce the local corrosion or stress concentration problem caused by protrusions or depressions, so that the petrolatum strip structure is better adapted to the whole bolt ball net rack structure, and the uniformity and stability of the protective effect are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a bolt ball net rack structure in the prior art.

[0021] Figure 2 is a structural schematic diagram of a kind of offshore photovoltaic bolt ball net rack structure (wherein one node is arranged with anticorrosion structure) using cladding type anticorrosion in the embodiment 1 of the utility model.

[0022] Figure 3 is Figure 2 the enlarged view of A in

[0023] Figure 4 is a partial sectional view of a kind of offshore photovoltaic bolt ball net rack structure using cladding type anticorrosion in the embodiment 2 of the utility model.

[0024] Figure 5 is a partial sectional view of a kind of offshore photovoltaic bolt ball net rack structure using cladding type anticorrosion in the embodiment 3 of the utility model.

[0025] In the figure: 1, bolt ball; 2, bar; 21, first end face; 3, sleeve; 4, fixing bolt; 5, anti-corrosion structure; 51, sealing mud structure; 52, petrolatum belt structure; 6, sealing ring; 7, chamfer; 8, counterbore. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application: Specific embodiment 1:

[0028] Reference Figures 2 to 3 The utility model discloses a kind of offshore photovoltaic bolt ball net rack structures (hereinafter referred to as net rack structure) using cladding type anticorrosion, including bolt ball 1, multiple bar 2, sleeve 3 and fixing bolt 4.Multiple bolt holes are provided on the peripheral surface of bolt ball 1, multiple bar 2 and bolt hole one-to-one correspondence, bar 2 towards the side of bolt ball 1 is in the shape of a circular truncated cone, and the end of bar 2 towards bolt ball 1 is first end face 21.

[0029] Sleeve 3 is clamped between bolt ball 1 and first end face 21, and the outer diameter of sleeve 3 is less than the outer diameter of first end face 21, the inside of bar 2 is hollow, and mounting hole adapted to fixing bolt 4 is formed on first end face 21, fixing bolt 4 passes through mounting hole, sleeve 3 inner hole in sequence from the inside of bar 2 outward and is screwed in corresponding threaded hole of bolt ball 1, sleeve 3 is fastened between bolt ball 1 and bar 2, sleeve 3, bar 2 are fastened on bolt ball 1, and constitute bolt ball net rack structure.

[0030] In the embodiment, the net rack structure further includes anticorrosion structure 5, specifically, anticorrosion structure 5 is arranged on the anticorrosion gap formed by bolt ball 1, bar 2 and sleeve 3.Anticorrosion structure 5 includes sealing mud structure 51 and petrolatum belt structure 52, wherein sealing mud structure 51 is in the shape of a ring as a whole, and the outer surface is smooth, one set of sealing mud structure 51 is arranged at both ends of sleeve 3, and the two sets of sealing mud structure 51 and sleeve 3 are dumbbell-shaped.Sealing mud structure 51 is used to seal the connection nodes of sleeve 3 and bolt ball 1 and the connection nodes of sleeve 3 and bar 2.

[0031] In the areas between the two sets of sealing mud structures 51 and between the bolt ball 1 and the rod 2, a petrolatum tape structure 52 is wrapped and filled. This petrolatum tape structure 52 fills the gaps formed by the bolt ball 1, the sealing mud, and the rod 2, forming a continuous protective layer. Simultaneously, the petrolatum tape structure 52 limits the position of the two sets of sealing mud structures 51, ensuring a sealing and corrosion-resistant effect on the joint. Furthermore, in this embodiment, the outer diameter of the sealing mud structure 51 is smaller than the outer diameter of the first end face 21, creating a step between the sealing mud structure 51 and the first end face 21 for the petrolatum tape structure 52 to wrap around. The outer diameter of the petrolatum tape structure 52 is adapted to the outer diameter of the first end face 21.

[0032] This design, by adding an anti-corrosion structure 5 containing a sealing mud structure 51 and a petrolatum strip structure 52 to the bolt ball space frame structure, effectively solves the problem of insufficient protection at the existing structural joints. The sealing mud structure 51 is placed at both ends of the sleeve 3, which can fill the joint gaps between the sleeve 3 and the rod 2 and between the sleeve 3 and the bolt ball 1, preventing corrosive media such as seawater, moisture, and salt spray from seeping in from the connection between the sleeve 3 and the rod 2 and the bolt ball 1.

[0033] The petrolatum tape structure 52 is wrapped and filled in the relevant gaps, with an outer diameter not less than the outer diameter of the first end face 21 of the member 2, forming a continuous protective layer that fully covers the node area. This significantly reduces the risk of decreased connection strength between the bolt ball 1 and the member 2 due to corrosion. Simultaneously, the anti-corrosion structure 52 acts as a buffer layer, preventing the easily damaged steel structure from impact and damage, effectively ensuring the stability of the entire grid structure in harsh marine environments and guaranteeing the safe and stable operation of the offshore photovoltaic project. Furthermore, the sealing mud structure 51 and the petrolatum tape structure 52 do not require curing time, which, compared to the long curing time and long construction waiting time of ordinary coatings, allows for continuous construction, saving construction time and reducing overall costs.

[0034] Preferably, in this embodiment, such as Figure 3 As shown, countersunk holes 8 extending in opposite directions are respectively opened on the opposite ends of the bolt ball 1 and the rod 2. The opposite ends of the two sets of sealing mud structures 51 are respectively inserted into and filled into the corresponding countersunk holes 8. At the same time, both ends of the sleeve 3 are respectively inserted into the corresponding countersunk holes 8, the sleeve 3 abuts against the bottom of the countersunk hole 8, and a sealing element is provided between the two end faces of the sleeve 3 and the corresponding countersunk hole 8.

[0035] Specifically, in this embodiment, the sealing element is a sealing ring 6. Matching annular grooves are provided at corresponding positions on the end face of the sleeve 3 and the bottom of the corresponding countersunk hole 8. The sealing ring 6 is disposed in the annular groove to achieve a seal. In other embodiments, the annular groove may be omitted, and a sealing gasket may be used as the sealing element.

[0036] In this way, the counterbore 8 is arranged at the opposite end of the bolt ball 1 and the rod 2, and the sealing mud structure 51 is filled in the counterbore 8, so that the range and depth of the sealing mud structure 51 are increased, the accumulation and penetration of corrosive substances in the joint are effectively prevented, the sealing path is increased, the sealing state can be maintained for a long time in the harsh conditions such as sea wave impact and high humidity air, the corrosion resistance of the joint is further improved, the maintenance frequency and cost are reduced, and the service life of the space truss structure is prolonged.

[0037] Meanwhile, the sealing member is arranged to strengthen the connection sealing between the sleeve 3 and the bolt ball 1 and the rod 2, so that the corrosive medium is effectively prevented from entering from the connection between the sleeve 3 and the counterbore 8, and the structural stability of the entire joint is enhanced, the connection loosening caused by seawater and other factors is avoided, the reliability of the bolt ball space truss structure in the complex marine environment is ensured, and the structure can withstand greater external force without safety hazards caused by joint corrosion and sealing failure. The ring groove is arranged on the bottom of the sleeve 3 and the counterbore 8, and the sealing ring 6 is completely sealed by extrusion, so that the sealing path is further increased, and the corrosion prevention performance is improved.

[0038] Preferably, in the embodiment, as shown in Figure 3 the petrolatum tape structure 52 extends to the peripheral surface of the bolt ball 1 and is chamfered with the peripheral surface of the bolt ball 1 at one end of the bolt ball 1. Meanwhile, the outer diameter of the petrolatum tape structure 52 decreases in sequence from the bolt ball 1 to the rod 2, and the other end of the petrolatum tape structure 52 is smoothly transitioned with the outer periphery of the rod 2.

[0039] In this way, on the one hand, the transition between the protective layer and the surface of the bolt ball 1 is smoother and more natural. The accumulation and retention of seawater on the protective surface can be reduced, and the risk of damage to the protective layer caused by the impact of sea waves or marine floating objects when the surface is uneven can be reduced, the durability and reliability of the entire corrosion prevention structure 5 are improved, and the joint part of the bolt ball space truss structure is better protected.

[0040] On the other hand, the outer diameter of the petrolatum tape structure 52 decreases in sequence from the bolt ball 1 to the rod 2 and is smoothly transitioned with the outer periphery of the rod 2, which ensures that there is enough protective thickness and strength at the key connection part (near the bolt ball 1), and smoothly transitions at the connection end with the rod 2, without affecting the overall structure and appearance of the rod 2. Meanwhile, the smooth transition design with the outer periphery of the rod 2 can reduce the local corrosion or stress concentration problem caused by protrusions or depressions, so that the petrolatum tape structure 52 is better adapted to the entire bolt ball space truss structure, and the uniformity and stability of the protection effect are improved.

[0041] Preferably, in the present embodiment, the sealing mud structure 51 comprises light and fat putty mixed with small particles of porous polymer. With such a sealing mud structure 51, it has good plasticity and filling properties, can closely fit into various shaped gaps, effectively block the invasion path of corrosive media. And the material has stable chemical properties, can resist long-term corrosion of seawater, salt and other corrosive media, and can maintain sealing effect for a long time in marine environment, providing reliable primary protection for the connection part of the bolt ball 1 and the rod 2, preventing the metal surface from being directly exposed to the corrosive environment, and ensuring the structural integrity.

[0042] Preferably, in the present embodiment, the petrolatum tape structure 52 comprises a non-woven fabric carrier and a petrolatum tape primer impregnated in the non-woven fabric carrier. The petrolatum tape primer is petroleum jelly. In other embodiments, the petrolatum tape primer can also be paraffin.

[0043] Specifically, the petrolatum tape structure 52 is a flexible and tape-shaped product manufactured by processes such as high-temperature liquid petroleum jelly rolling and impregnation, air cooling and shaping, trimming and shaping, etc. using the non-woven fabric carrier as the forming carrier and the petroleum jelly in semi-solid state at room temperature as the main forming material. According to the environmental requirements, a certain amount of additives and flame retardants can be uniformly mixed in the petroleum jelly in advance. The width of the petrolatum tape structure 52 needs to be adjusted according to different node forms and corrosion prevention requirements.

[0044] In this way, the petrolatum tape structure 52 can effectively prevent the corrosion of corrosive media on the steel structure and has good overall performance, not only can isolate seawater, but also can resist mechanical damage to the steel structure. It ensures the normal operation and long-term stability of the offshore photovoltaic project.

[0045] Working process of the present application:

[0046] First, install the bolt ball net rack structure. And make sure that the corrosion prevention surface of the corrosion prevention structure 5 is smooth and has no sharp objects.

[0047] Fill the corresponding strip-shaped sealing mud structure 51 into the gap on both sides of the sleeve 3 to form a circular ring. The sealing mud structure 51 should not be higher than the first end surface 21, and the whole should be in the shape of a dumbbell.

[0048] Lap one side of the petrolatum tape structure 52 at the first end surface 21 and the other side of the petrolatum tape structure 52 against the end surface of the bolt ball 1, and wrap it around the sleeve 3 as the axis.

[0049] According to the size of the construction structure, one hand holds the petrolatum tape structure 52 at the petrolatum tape structure 52, and the other hand rotates and presses the petrolatum tape structure 52 in the direction of wrapping, so that the two ends and the lap joint of the petrolatum tape structure 52 are tightly fitted.

[0050] In the offshore photovoltaic bolt ball net rack structure of the present embodiment adopting the anticorrosion coating, an anticorrosion structure 5 is arranged between the bolt ball 1 and each rod 2, and in the drawings of the present embodiment, only the anticorrosion structure 5 is arranged between the bolt ball 1 and one of the rods 2 for display.

[0051] The net rack structure of the present embodiment has the following beneficial effects:

[0052] 1. Simple construction conditions, no time and environmental condition restrictions, low requirements for surface treatment.

[0053] 2. No curing waiting is required. Compared with the long curing time and long construction waiting time of ordinary coatings, continuous construction can be carried out, construction time is saved, and comprehensive cost is reduced.

[0054] 3. The anticorrosion structure 5 is used as a buffer layer for coating, which can weaken or even prevent the coated steel structure from being impacted and damaged.

[0055] 4. Flexible preparation process. It can be prefabricated in a factory, or it can be processed on site according to the shape of the protected substrate.

[0056] 5. Light weight. The entire anticorrosion structure 5 is light in weight, does not increase additional load on the steel structure, and does not affect the carrying capacity of the overall structure.

[0057] 6. Green and environmentally friendly. The multi-layer petroleum jelly coating series has no toxic additives and is environmentally friendly, causing no pollution.

[0058] 7. Simple structure unit, easy to install and disassemble, high structural efficiency, diversified materials, and good adaptation to corrosion resistance requirements in marine environmental conditions.

[0059] In summary, the net rack structure of the present embodiment is simple, efficient and convenient to operate, can meet the requirements of offshore photovoltaic construction period, has great practical significance, and provides strong technical support for the development of offshore photovoltaic industry. With the growing global demand for clean energy, the offshore photovoltaic power generation market has broad prospects. The application of this anticorrosion form will help improve the reliability and economy of offshore photovoltaic power stations and promote the rapid development of offshore photovoltaic industry.

[0060] Embodiment 2: The present embodiment provides a different net rack structure, which is different from embodiment 1, as shown in Figure 4 In the present embodiment, when the actual anticorrosion sealing use requirements are met, the relative end faces of the bolt ball 1 and the rod 2 can not be provided with a counterbore 8, and the sealing ring 6 can also not be provided, at this time the sealing mud structure 51 is directly attached to the relative end faces of the bolt ball 1 and the rod 2 to seal the gap.

[0061] Embodiment 3: This embodiment provides a different grid structure, which is different from Embodiment 2 in that, as shown in Figure 5 In this embodiment, the petrol tape structure 52 extends to the outer peripheral surface of the circular truncated cone structure inside the rod member 2 at one end of the rod member 2 and smoothly transitions between the outer peripheral surface of the circular truncated cone structure, thereby ensuring that the node at this position has sufficient protection thickness and strength and improving the protection and corrosion resistance.

[0062] Embodiment 4: This embodiment provides a different grid structure, which is different from Embodiment 1 in that, in this embodiment, the petrol tape structure as a whole can be a cylindrical structure with equal diameters when meeting the actual use requirements.

[0063] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0064] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0065] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

Claims

1. An offshore photovoltaic bolted ball grid structure with cladded corrosion protection, characterized in that, The bolt ball, the rod, the sleeve and the fixing bolt are included, the outer diameter of the sleeve is smaller than the outer diameter of the first end face of the rod towards the bolt ball, and the fixing bolt is fixedly connected with the bolt ball and the rod and fastens the sleeve between the bolt ball and the rod; The anti-corrosion structure is further included, the anti-corrosion structure includes the sealing mud structure and the petrolatum tape structure, a set of the sealing mud structure is arranged at each end of the sleeve respectively, the petrolatum tape structure is wound to fill the gap formed by the bolt ball, the sealing mud structure and the rod, the outer diameter of the sealing mud structure is not greater than the outer diameter of the first end face, and the outer diameter of the petrolatum tape structure is not less than the outer diameter of the first end face.

2. The offshore photovoltaic bolted spherical net structure with cladded corrosion protection according to claim 1, characterized in that, Opposite ends of the bolt ball and the rod are respectively provided with counterbores extending in opposite directions, and opposite ends of the two sets of sealing mud structures respectively extend into and are filled in the corresponding counterbores.

3. The offshore photovoltaic bolted ball grid structure with cladded corrosion protection of claim 2, wherein, The two ends of the sleeve respectively extend into the corresponding counterbores, and a sealing element is arranged between the end face of the sleeve and the corresponding counterbores.

4. The offshore photovoltaic bolted spherical net structure with cladded corrosion protection of claim 1, wherein, The end of the petrolatum tape structure towards the bolt ball extends to the peripheral surface of the bolt ball and is chamfered between the peripheral surface of the bolt ball.

5. The offshore photovoltaic bolted ball grid structure with cladded corrosion protection of claim 4, wherein, The outer diameter of the petrolatum tape structure gradually decreases in the direction from the bolt ball to the rod, and the end of the petrolatum tape structure towards the rod is smoothly connected with the outer periphery of the rod.

6. The offshore photovoltaic bolted ball grid structure with cladded corrosion protection of claim 1, wherein, The sealing mud structure includes light grease mortar mixed by hydrocarbons and small-particle porous polymers.

7. The offshore photovoltaic bolted ball grid structure with cladded corrosion protection of claim 1, wherein, The petrolatum tape structure includes a non-woven fabric carrier and a petrolatum tape primer impregnated on the non-woven fabric carrier.

8. The offshore photovoltaic bolted ball grid structure with cladded corrosion protection of claim 7, wherein, The petrolatum tape primer is petroleum grease.

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