Offshore photovoltaic panel-purline integrated connection node structure suitable for offshore photovoltaic

Abstract

The invention discloses an offshore photovoltaic panel-purline integrated connection node structure suitable for offshore photovoltaic. The photovoltaic panel is embedded in the aluminum alloy frame, the aluminum alloy frame is connected with the upper flange of the purline through a bolt, the aluminum alloy pressing block acts on the upper portion of the aluminum alloy frame of the photovoltaic panel and holds the C-shaped purline through the U-shaped screw and the bottom plate, and meanwhile the bottom plate is connected with the lower flange of the C-shaped purline through a bolt. The purlines parallel to each other are connected through flat steel braces and U-shaped bolt bottom plates, and the cold-formed section steel is connected with the upper and lower turned edges of the opening sides of the C-shaped purlines through self-tapping screws. The C-shaped purline is surrounded by the U-shaped bolts, the photovoltaic panel is reinforced and fixed, the connection reliability of the offshore photovoltaic panel under the action of dynamic loads such as stormy waves is ensured, the bottom plates of the U-shaped bolts are connected with the flat steel braces, and the overall stability of the purline under the action of wind suction force is greatly improved; and due to the design of the cold-formed section steel, the section of the C-shaped purline is prevented from deforming when the U-shaped bolt is screwed down, and great application value is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of steel structure design, and in particular relates to an offshore photovoltaic panel-purlin integrated connection node structure suitable for offshore photovoltaics. Background Art

[0002] Purlin systems are often used in photovoltaic support structures, and photovoltaic panels are usually directly connected to the purlin flanges through the mounting holes on the aluminum alloy frame using bolts. However, for offshore photovoltaics, under the repeated action of dynamic loads such as sea breeze and waves, ordinary bolt connections are prone to loosening due to vibration, and cases of partial detachment of photovoltaic panels or overall failure of the connected support structure occur from time to time. Therefore, it is necessary to further strengthen the original bolt connection. One existing reinforcement method is to use aluminum alloy blocks and U-bolts to hold the C-shaped purlins tightly. However, the problem is that the open C-shaped purlin cross-section and the bottom plate will deform during the continuous tightening of the U-bolts. Not only is it difficult to determine the degree of tightening of the U-bolts, but the deformation of the C-shaped purlin cross-section will also have an adverse effect on the safety of the structure.

[0003] In addition, in order to avoid the overall instability caused by the compression of the lower flange of the purlin under the action of wind suction, the common practice is to use round steel tie rods to connect the parallel purlins. At the side span, the round steel tie rods are connected to the one-way truss structure to form an overall lateral support structure. However, since the round steel tie rods are usually connected to the web of the purlin, and there is a misalignment between the tie rods connecting the purlins of different spans, and the web of the cold-formed steel is thin, the local bending stiffness is small, resulting in the lateral stiffness that this type of tie rod can provide is very small, and it cannot play the role of restraining the lower flange of the purlin, and cannot meet the stability requirements of the purlin structure system under the action of wind suction. The working conditions of offshore photovoltaics are harsh, and there are occasional extreme load conditions such as typhoons and storms. The stability of the purlin is more prominent than that of onshore photovoltaics, so the role of the tie rod is more important. In addition, due to the continuous action of sea breeze and waves all year round, the tie rods acting on the web of the purlin are extremely loose because the bolts cannot be tightened due to the thin web. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide an integrated connection node structure of offshore photovoltaic panels and purlins suitable for offshore photovoltaics. The present invention can not only avoid the bending deformation of the cross section of the C-type purlin when the U-bolt is tightened, effectively strengthen the connection between the photovoltaic panel and the purlin, but also provide a reliable lateral constraint for the lower flange of the C-type purlin, thereby improving the stability of the C-type purlin under the action of wind suction.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The integrated node structure of offshore photovoltaic panel-purlin connection includes purlins, photovoltaic panels, aluminum alloy frames, aluminum alloy blocks and U-bolt assemblies; the photovoltaic panels are coaxially installed on the top of the aluminum alloy frames, the aluminum alloy blocks are coaxially pressed on the aluminum alloy frames, the top of the U-bolt assemblies pass through the aluminum alloy blocks, the opening position of the U-bolt assemblies is provided with purlins perpendicular to the photovoltaic panels, the top of the purlins is fixedly connected to the aluminum alloy frames, and the bottom of the purlins is in contact with the bottom of the U-bolt assemblies.

[0007] The U-bolt assembly includes a U-bolt, a base plate and a tie rod; the U-bolt is placed in an inverted U shape, and through holes are opened in the middle of the base plate and the aluminum alloy pressing block. The top of the U-bolt passes through the through hole in the middle of the aluminum alloy pressing block and is fixedly connected to the aluminum alloy pressing block. The two ends of the bottom of the U-bolt pass through the through holes on the base plate and are fixedly connected to the base plate. The tie rod is arranged perpendicular to the purlin, and the two adjacent base plates respectively connected to the two adjacent purlins are connected through the tie rod, and the two ends of the tie rod are respectively fixedly connected to the upper surface of the base plate, and the base plate, the tie rod and the aluminum alloy pressing block are all arranged along the same direction.

[0008] The purlins are C-shaped purlins, which are arranged in a direction perpendicular to the axial direction of the aluminum alloy frame, and are arranged at the opening position of the U-shaped bolts, so that the U-shaped bolts surround the purlins and press the purlins, the flange plate at the top of the purlin is connected to the bottom end of the aluminum alloy frame, the flange at the bottom end of the purlin is connected to the bottom plate, and the two rolled edges of the purlin are connected to the vertically arranged cold-bent steel.

[0009] The aluminum alloy pressing block is one of an aluminum alloy middle pressing block and an aluminum alloy side pressing block.

[0010] When the aluminum alloy pressing block adopts an aluminum alloy middle pressing block, two aluminum alloy frames are symmetrically arranged on both sides of the U-shaped bolt, and two photovoltaic panels are respectively installed on the top of the two aluminum alloy frames. The tops of both ends of the aluminum alloy middle pressing block are respectively pressed on the two aluminum alloy frames. The aluminum alloy middle pressing block does not contact the purlin, and the bottom ends of the two aluminum alloy frames are connected to the flanges of the purlin by bolts.

[0011] When the aluminum alloy pressing block adopts an aluminum alloy side pressing block, an aluminum alloy frame is arranged on a side close to the top of the aluminum alloy side pressing block, a photovoltaic panel is installed on the top of the aluminum alloy frame, the top of the aluminum alloy side pressing block is pressed on the aluminum alloy frame, the bottom end of the aluminum alloy side pressing block is pressed on the flange of the purlin, and the bottom end of the aluminum alloy frame is connected to the flange of the purlin by bolts.

[0012] The base plate and the tie rod are connected by bolt connection or welding.

[0013] The plurality of L-shaped cold-bent steels are arranged at intervals along the axial direction of the purlin, and each cold-bent steel is arranged perpendicular to the direction of the purlin flange, and the upper and lower ends of the cold-bent steel are respectively connected to the two curling edges of the purlin.

[0014] The photovoltaic panel is embedded in the aluminum alloy frame, and the first connection is formed with the upper flange of the C-shaped purlin by bolts through the mounting holes on the aluminum alloy frame. The aluminum alloy block acts on the upper part of the aluminum alloy frame of the photovoltaic panel, and the U-shaped bolt passes through the aluminum alloy block and is connected to the bottom plate at the bottom of the C-shaped purlin section by bolts, encircling the C-shaped purlin. Cold-bent steel is arranged vertically on both sides of the U-shaped bolt, and the upper and lower curling edges of the C-shaped purlin are connected by self-tapping screws. Tighten the bolts connecting the U-shaped bolt and the bottom plate so that the U-shaped bolt hugs the C-shaped purlin, thereby forming a second reinforced connection between the photovoltaic panel and the purlin.

[0015] The bottom plate is fixedly connected to the U-bolts by bolts, and the bottom plate is pressed against the lower flange of the C-shaped purlin. Flat steel bars are arranged between multiple parallel purlins, and the flat steel bars are perpendicular to the length direction of the purlins. The two ends of each flat steel bar are respectively connected to the U-bolt bottom plates under the two adjacent parallel C-shaped purlins by bolts or welding.

[0016] The present invention uses U-bolts to embrace the C-shaped purlins to strengthen and fix the photovoltaic panels, thereby ensuring the reliability of the connection of the offshore photovoltaic panels under dynamic loads such as wind and waves. At the same time, the U-bolt base plate is also used to connect the flat steel tie rods, directly providing lateral constraints on the lower flange of the C-shaped purlins, which can give full play to the tensile stiffness of the tie rods, thereby greatly improving the overall stability of the purlins under the action of wind suction. In addition, the use of L-shaped cold-bent steel and the curling edge of the C-shaped purlin opening side avoids the problem of deformation of the C-shaped purlin cross section when the U-bolts are tightened, resulting in the inability to tighten the bolts of the U-shaped bracket at the C-shaped purlin opening. The one-piece connector proposed by the present invention is easy to process and install, and has great application value.

[0017] The design principle of the present invention is:

[0018] First, by arranging aluminum alloy blocks and U-bolts, a second reliable connection is formed between the photovoltaic panel and the purlin. Secondly, vertical cold-bent steel is arranged on both sides of the U-bolt, and connected to the upper and lower flanges of the C-shaped purlin by self-tapping screws, so as to avoid the deformation of the C-shaped purlin cross section during the tightening process of the U-bolt and the inability to tighten, thereby ensuring the reliability of the U-bolt connection. In addition, flat steel bars are provided between the parallel purlins. The flat steel bars are perpendicular to the length direction of the purlin, and the two ends of the flat steel bars are respectively connected to the bottom plate under the flanges of the purlins on both sides. At the side span, the flat steel bars are connected to the one-way truss to form an integral support structure. Between the parallel purlins, flat steel bars fixed on the bottom plate are used to replace the traditional round steel bars connected to the purlin web. On the one hand, the flat steel bars can directly act on the lower flange of the C-shaped purlin, avoiding the shortcomings of traditional bars with poor rigidity and easy loosening due to web deformation. On the other hand, since the flat steel bars are connected to the bottom plate of the connecting piece, and the connecting piece is tightly connected to the photovoltaic panel and the C-shaped purlin, part of the in-plane stiffness of the photovoltaic panel is utilized, so that the flat steel bars can provide sufficient lateral constraints for the lower flange of the C-shaped purlin, greatly improving the stability of the C-shaped purlin under wind suction.

[0019] The beneficial effects of the present invention are:

[0020] 1. The offshore photovoltaic panel-purlin connection node structure proposed in the present invention avoids the deformation of the C-shaped purlin cross section during the continuous tightening of the U-shaped bolts, ensures the tight connection between the U-shaped bolts and the purlins, and effectively enhances the reliability of the connection between the photovoltaic panel and the purlins.

[0021] 2. The offshore photovoltaic panel-purlin connection node structure proposed in the present invention greatly improves the restraining effect of the brace on the lower flange of the C-shaped purlin, ensuring the stability of the purlin structure system under the action of wind suction;

[0022] 3. The offshore photovoltaic panel-purlin connection node structure proposed by the present invention has a simple structure and is easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric diagram of the main components of the integrated connector of the intermediate pressure block of the offshore photovoltaic panel-purlin system;

[0024] Figure 2 It is an axonometric diagram of the middle span photovoltaic panel and aluminum alloy frame;

[0025] Figure 3 It is a front view of the integrated connector of the intermediate pressure block of the offshore photovoltaic panel-purlin system;

[0026] Figure 4 It is a side view of the integrated connector of the intermediate pressure block of the offshore photovoltaic panel-purlin system (connected by flat steel bolts);

[0027] Figure 5 It is a side view of the integrated connector of the intermediate pressure block of the offshore photovoltaic panel-purlin system (flat steel welding connection);

[0028] Figure 6 It is an axonometric diagram of the main components of the edge pressure block integrated connector of the offshore photovoltaic panel-purlin system;

[0029] Figure 7 It is an axonometric diagram of the side-span photovoltaic panel and the aluminum alloy frame;

[0030] Figure 8 It is a front view of the edge pressure block integrated connector of the offshore photovoltaic panel-purlin system;

[0031] Fig. 9 It is a side view of the edge pressure block integrated connector of the offshore photovoltaic panel-purlin system (flat steel bolt connection);

[0032] Fig.10 It is a side view of the edge pressure block integrated connector of the offshore photovoltaic panel-purlin system (flat steel welding connection);

[0033] Fig.11 Schematic diagram of the connection between parallel purlins.

[0034] In the figure: 1. Purlin; 2. Photovoltaic panel; 3. Aluminum alloy frame; 4. Aluminum alloy middle pressure block; 5. Aluminum alloy side pressure block; 6. U-bolt; 7. Bottom plate; 8. Cold-bent steel; 9. Bolt; 10. Flat washer; 11. Spring washer; 12. Nut; 13. Self-tapping screw; 14. Pull rod; 15. Weld. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but will not limit the present invention in any form.

[0036] like Figure 1-Figure 2 As shown, the node structure includes a purlin 1, a photovoltaic panel 2, an aluminum alloy frame 3, an aluminum alloy pressing block and a U-bolt assembly; the photovoltaic panel 2 is coaxially installed on the top of the aluminum alloy frame 3, the aluminum alloy pressing block is coaxially pressed on the aluminum alloy frame 3, the top of the U-bolt assembly passes through the aluminum alloy pressing block, and the opening position of the U-bolt assembly is provided with a purlin 1 perpendicular to the photovoltaic panel 2, the opening direction of the purlin 1 is horizontal, the top end of the purlin 1 is fixedly connected to the aluminum alloy frame 3, and the bottom end of the purlin 1 is in contact with the bottom end of the U-bolt assembly.

[0037] The U-shaped bolt assembly includes a U-shaped bolt 6, a base plate 7 and a tie rod 14; the U-shaped bolt 6 is placed in an inverted U shape, and through holes are opened in the middle of the base plate 7 and the aluminum alloy block. The top of the U-shaped bolt 6 passes through the through hole in the middle of the aluminum alloy block and is fixedly connected to the aluminum alloy block. The two ends of the bottom of the U-shaped bolt 6 pass through the through holes on the base plate 7 and are fixedly connected to the base plate 7 through nuts 12. The tie rod (14) is arranged perpendicular to the length direction of the purlin 1, and the two adjacent base plates 7 connected to the two adjacent purlins 1 are connected through the tie rod 14, and the two ends of the tie rod 14 are respectively fixedly connected to the upper surface of the base plate 7. Fig.11 As shown, both ends of the tie rod 14 are respectively connected to the bottom plate 7 below two parallel adjacent purlins 1, the tie rod 14 is perpendicular to the length direction of the parallel purlins, and the bottom plate 7, the tie rod 14 and the aluminum alloy pressing block are all arranged along the same direction.

[0038] The tie rods 14 are connected by bolts or welds 15. A flat washer 10 and a spring washer 11 are arranged in sequence from top to bottom between the bottom plate 7 and the nut 12.

[0039] The purlin 1 adopts a C-shaped purlin, and the purlin 1 is horizontally arranged in a direction perpendicular to the axial direction of the aluminum alloy frame 3, and the purlin 1 is arranged at the opening position of the U-shaped bolt 6, so that the U-shaped bolt 6 surrounds the purlin 1 and presses the purlin 1, and the flange plate at the top end of the purlin 1 is connected to the bottom end of the aluminum alloy frame 3 by bolts 9, and the flange at the bottom end of the purlin 1 is connected to the bottom plate 7 by bolts 9 and nuts 12, and the two curled edges of the purlin 1 are connected to the vertically arranged cold-bent steel 8.

[0040] The purlin 1 includes a web, two flanges and two curling edges. The two ends of the web are connected to the two flanges respectively, and the two flanges are connected to the two curling edges respectively. The web and the flanges are perpendicular to each other, and the flanges and the curling edges are perpendicular to each other. In the purlin 1, the curling edges are bent toward the inner side of the flanges to form a C-shaped structure. The cold-formed steel 8 and the curling edges of the purlin 1 are connected by self-tapping screws 13.

[0041] The aluminum alloy pressing block adopts one of an aluminum alloy middle pressing block 4 and an aluminum alloy side pressing block 5. The aluminum alloy middle pressing block 4 is an axisymmetric "X"-shaped structure, and the aluminum alloy side pressing block 5 is an asymmetric stepped structure.

[0042] like Figure 3-Figure 4 As shown, when the aluminum alloy pressing block adopts an aluminum alloy middle pressing block 4, two aluminum alloy frames 3 are symmetrically arranged on both sides of the U-shaped bolt 6, and the center of gravity connection line of the two aluminum alloy frames 3 is perpendicular to the plane where the U-shaped bolt 6 is located. The two photovoltaic panels 2 are respectively installed on the top of the two aluminum alloy frames 3, and the tops of the two ends of the aluminum alloy middle pressing block 4 along the width direction are respectively pressed on the two aluminum alloy frames 3. The aluminum alloy middle pressing block 4 does not contact the purlin 1, and the bottom ends of the two aluminum alloy frames 3 are connected to the flanges of the purlin 1 by bolts.

[0043] like Figure 6-Figure 9 As shown, when the aluminum alloy pressing block adopts the aluminum alloy side pressing block 5, an aluminum alloy frame 3 is arranged on a side close to the top of the aluminum alloy side pressing block 5, a photovoltaic panel 2 is installed on the top of the aluminum alloy frame 3, the top of the aluminum alloy side pressing block 5 is pressed on the aluminum alloy frame 3, the bottom end of the aluminum alloy side pressing block 5 is pressed on the flange of the purlin 1, and the bottom end of the aluminum alloy frame 3 is connected to the flange of the purlin 1 by bolts.

[0044] The connection position between the aluminum alloy edge pressing block 5 and the purlin 1 is taken as position one, and the connection position between the aluminum alloy frame 3 and the purlin 1 is taken as position two. Position one and position two are respectively located on both sides of the U-bolt 6 .

[0045] like Figure 5 and Fig.10 As shown, the connection between the bottom plate 7 and the tie rod 14 is achieved by bolt connection or welding.

[0046] A plurality of L-shaped cold-formed steels 8 are arranged at intervals along the axial direction of the purlin 1, and each cold-formed steel 8 is arranged perpendicular to the direction of the flange of the purlin 1. The upper and lower ends of the cold-formed steel 8 are respectively connected to the two curling edges of the purlin 1 through self-tapping screws 13.

[0047] The photovoltaic panel 2 is embedded in the aluminum alloy frame 3, and the aluminum alloy frame 3 is connected to the flange of the C-shaped purlin 1 by bolts. The aluminum alloy blocks 4 and 5 act on the top of the aluminum alloy frame 3, and the U-shaped bolts 6 pass through the aluminum alloy blocks and embrace the C-shaped purlin. The C-shaped purlin is connected to the bottom plate 7 by a bolt assembly, and the bolt assembly includes bolts 9, flat washers 10, spring washers 11 and nuts 12. The L-shaped cold-formed steel 8 is connected to the upper and lower curling edges of the opening side of the C-shaped purlin by self-tapping screws 13. The L-shaped cold-formed steel 8 can be arranged on one side of the U-shaped bolt 6 or on both sides at the same time. When the internal space of the cross-section of the C-shaped purlin 1 is sufficient, the L-shaped cold-formed steel 8 can be arranged on the inner side of the curling edge. At the same time, the cold-formed steel 8 can also be cold-formed steel with other cross-sections such as C-shaped cold-formed steel. After the U-shaped bolt 6 is connected to the bottom plate 7, the C-shaped purlin is tightly embraced by tightening the U-shaped bolt 6. The bottom plate 7 is preferably connected to the lower flange of the C-shaped purlin 1 by bolts. The C-shaped purlins 1 parallel to each other are connected to the flat steel brace 14 through the bottom plate 7. The brace 14 is not limited to the flat steel section, and can also be L-shaped, C-shaped, round steel or other sections suitable for connection with the bottom plate 7.

[0048] Embodiment 1 of the present invention is as follows:

[0049] Figure 1 and Figure 2 The axonometric drawing of the main components is given in FIG, including: C-shaped purlin 1, photovoltaic panel 2, aluminum alloy frame 3, aluminum alloy middle pressure block 4, U-shaped bolt 6, bottom plate 7, L-shaped cold-formed steel 8 and flat steel tie rod 14. Figure 3 , Figure 4 and Figure 5 As shown, the photovoltaic panel 2 is embedded in the aluminum alloy frame 3, and the aluminum alloy frame 3 is connected to the upper flange of the C-shaped purlin 1 by bolts 9. The aluminum alloy middle pressure block 4 acts on the aluminum alloy frame 3. The U-shaped bolt 6 passes through the aluminum alloy middle pressure block 4 and embraces the C-shaped purlin 1. The L-shaped cold-formed steel is vertically arranged on the left and right of the U-shaped bolt, and is connected to the upper and lower curling edges of the opening side of the C-shaped purlin 1 by self-tapping screws 13. The U-shaped bolt 6 is connected to the bottom plate 7 by bolts, and the U-shaped bolt 6 is tightened to the C-shaped purlin 1 by tightening the bolt 9. The bottom plate 7 is connected to the lower flange of the C-shaped purlin 1 by bolts. The C-shaped purlins parallel to each other are connected to the flat steel tie rod 14. The flat steel tie rod 14 is connected to the bottom plate 7 by bolts 9 or welds 15. When the bolt 9 is connected, it is advisable to use a flat washer 10, a spring washer 11 and a nut 12 to prevent loosening. If necessary, two nuts 12 can be used.

[0050] The second embodiment of the present invention is as follows:

[0051] Figure 6 and Figure 7 The axonometric drawing of the main components is given in FIG, including: C-shaped purlin 1, photovoltaic panel 2, aluminum alloy frame 3, aluminum alloy edge block 5, U-shaped bolt 6, bottom plate 7, L-shaped cold-formed steel 8 and flat steel tie rod 14. Figure 8 , Fig. 9 and Fig.10 As shown, the photovoltaic panel 2 is embedded in the aluminum alloy frame 3, and the aluminum alloy frame 3 is connected to the upper flange of the C-shaped purlin 1 by bolts 9. The aluminum alloy side pressure block 5 acts on the top of the aluminum alloy frame 3 and the upper flange of the C-shaped purlin 1. The U-shaped bolt 6 passes through the aluminum alloy middle pressure block 5 and embraces the C-shaped purlin 1. The L-shaped cold-bent steel is vertically arranged on the left and right of the U-shaped bolt, and is connected to the upper and lower curling edges of the opening side of the C-shaped purlin 1 by self-tapping screws 13. The U-shaped bolt 6 is connected to the bottom plate 7 by bolts, and the U-shaped bolt 6 is tightened to the C-shaped purlin 1 by tightening the bolt 9. The bottom plate 7 is connected to the lower flange of the C-shaped purlin 1 by bolts. The C-shaped purlins parallel to each other are connected to the flat steel tie rod 14. The flat steel tie rod 14 is connected to the bottom plate 7 by bolts 9 or welds 15.

Claims

1. An integrated node structure for offshore photovoltaic panels and purlins, suitable for offshore photovoltaics, characterized in that: The invention comprises a purlin (1), a photovoltaic panel (2), an aluminum alloy frame (3), an aluminum alloy pressing block and a U-shaped bolt assembly; the photovoltaic panel (2) is coaxially mounted on the top of the aluminum alloy frame (3), the aluminum alloy pressing block is coaxially pressed on the aluminum alloy frame (3), the top of the U-shaped bolt assembly passes through the aluminum alloy pressing block, a purlin (1) perpendicular to the photovoltaic panel (2) is arranged at the opening position of the U-shaped bolt assembly, the top end of the purlin (1) is fixedly connected to the aluminum alloy frame (3), and the bottom end of the purlin (1) contacts the bottom end of the U-shaped bolt assembly.

2. According to claim 1, an integrated node structure of offshore photovoltaic panels and purlins suitable for offshore photovoltaics is characterized by: The U-shaped bolt assembly comprises a U-shaped bolt (6), a base plate (7) and a pull rod (14); The U-shaped bolt (6) is placed in an inverted U shape, and through holes are opened in the middle of the bottom plate (7) and the aluminum alloy pressing block. The top of the U-shaped bolt (6) passes through the through hole in the middle of the aluminum alloy pressing block and is fixedly connected to the aluminum alloy pressing block. The two ends of the bottom of the U-shaped bolt (6) pass through the through holes on the bottom plate (7) and are fixedly connected to the bottom plate (7). The tie rod (14) is arranged perpendicular to the purlin (1), and the two adjacent bottom plates (7) respectively connected to the two adjacent purlins (1) are connected through the tie rod (14). The two ends of the tie rod (14) are respectively fixedly connected to the upper surface of the bottom plate (7), and the bottom plate (7), the tie rod (14) and the aluminum alloy pressing block are all arranged along the same direction.

3. According to claim 2, an integrated node structure of offshore photovoltaic panels and purlins suitable for offshore photovoltaics is characterized by: The purlin (1) is a C-shaped purlin. The purlin (1) is arranged in a direction perpendicular to the axial direction of the aluminum alloy frame (3). The purlin (1) is arranged at the opening position of the U-shaped bolt (6), so that the U-shaped bolt (6) surrounds the purlin (1) and presses the purlin (1). The flange plate at the top end of the purlin (1) is connected to the bottom end of the aluminum alloy frame (3), the flange at the bottom end of the purlin (1) is connected to the bottom plate (7), and the two rolled edges of the purlin (1) are connected to the vertically arranged cold-bent steel (8).

4. The integrated node structure of offshore photovoltaic panel-purlin connection suitable for offshore photovoltaic according to claim 2, characterized in that: The aluminum alloy pressing block is one of an aluminum alloy middle pressing block (4) and an aluminum alloy side pressing block (5).

5. The integrated node structure of offshore photovoltaic panel-purlin connection suitable for offshore photovoltaic according to claim 4, characterized in that: When the aluminum alloy pressing block adopts an aluminum alloy middle pressing block (4), two aluminum alloy frames (3) are symmetrically arranged on both sides of the U-shaped bolt (6), and two photovoltaic panels (2) are respectively installed on the top of the two aluminum alloy frames (3). The tops of both ends of the aluminum alloy middle pressing block (4) are respectively pressed on the two aluminum alloy frames (3), and the aluminum alloy middle pressing block (4) does not contact the purlin (1). The bottom ends of the two aluminum alloy frames (3) are connected to the flanges of the purlin (1) by bolts.

6. The integrated node structure of offshore photovoltaic panel-purlin connection suitable for offshore photovoltaic according to claim 4, characterized in that: When the aluminum alloy pressing block adopts an aluminum alloy side pressing block (5), an aluminum alloy frame (3) is arranged on a side close to the top of the aluminum alloy side pressing block (5), a photovoltaic panel (2) is installed on the top of the aluminum alloy frame (3), the top of the aluminum alloy side pressing block (5) is pressed on the aluminum alloy frame (3), the bottom end of the aluminum alloy side pressing block (5) is pressed on the flange of the purlin (1), and the bottom end of the aluminum alloy frame (3) is connected to the flange of the purlin (1) by bolts.

7. The integrated node structure of offshore photovoltaic panel-purlin connection suitable for offshore photovoltaic according to claim 2, characterized in that: The base plate (7) and the tie rod (14) are connected by bolt connection or welding connection.

8. The integrated node structure of offshore photovoltaic panel-purlin connection suitable for offshore photovoltaic according to claim 3, characterized in that: The plurality of L-shaped cold-bent steels (8) are arranged at intervals along the axial direction of the purlin (1), and each cold-bent steel (8) is arranged perpendicular to the direction of the flange of the purlin (1), and the upper and lower ends of the cold-bent steel (8) are respectively connected to the two curling edges of the purlin (1).

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