Construction method for continuously assembling offshore photovoltaic platform in land area

Abstract

The invention discloses a construction method for continuously assembling an offshore photovoltaic platform in a land area, which comprises the following steps of: S1, assembling a truss sheet body and a truss cantilever to form a truss; s2, a purline is mounted and welded on the truss cantilever; s3, a bird repelling device support and a bird repelling device are installed at the cantilever end of the truss, and the photovoltaic panel is installed on the purline through a photovoltaic fixing assembly; step S4, determining a platform number according to offshore requirements, respectively installing an inverter support, an inverter, a grounding terminal, a hanging support and a ladder frame below the truss cantilever upper chord and the truss cantilever lower chord, and laying a direct current cable; s5, transferring the assembling tool after the photovoltaic panel is installed to a supporting leg installation station tool, welding supporting legs, and installing the uncompleted hanging brackets and ladder assemblies; and S6, transporting the assembled photovoltaic platform to an offshore construction site. According to the invention, by arranging the running water assembly line, the land running water assembly construction of the photovoltaic platform is realized.

Description

Technical Field

[0001] The invention relates to a construction method for continuous assembly of an offshore photovoltaic platform on land. Background Art

[0002] Offshore photovoltaics is a new way of using marine energy and developing resources. The offshore environment is different from that on land. Under the same lighting conditions, the open sea surface, no obstructions, long sunshine hours, and high radiation make offshore photovoltaic projects more efficient in light utilization, and the power generation of offshore photovoltaic power stations is significantly increased.

[0003] At present, offshore photovoltaic construction is a blank area in the country and there are no relevant construction cases.

[0004] According to the analysis of conventional lake photovoltaic or intertidal zone photovoltaic construction cases, the existing construction technology is to assemble and install photovoltaic platforms on-site in parts. However, due to poor sea conditions and limited on-site working space at offshore photovoltaic construction sites, it is difficult to arrange a large number of manpower. Applying this technology to offshore photovoltaics has many disadvantages such as low construction efficiency, many cross-operations, less available time, and high on-site construction risks.

[0005] Therefore, a construction method for continuous assembly of an offshore photovoltaic platform on land is provided. Summary of the invention

[0006] The purpose of the present invention is to overcome the existing defects and provide a construction method for continuous assembly of offshore photovoltaic platforms on land. By setting up an assembly line, truss sheet assembly, cantilever assembly, purlin welding, photovoltaic panel installation and leg installation are integrated, thereby realizing the on-land assembly construction of photovoltaic platforms.

[0007] The technical solution to achieve the above purpose is:

[0008] A construction method for continuous assembly of an offshore photovoltaic platform on land, wherein the offshore photovoltaic platform is composed of a truss sheet, a truss cantilever, purlins, photovoltaic panels and legs, including:

[0009] Step S1, assembling the truss sheets and the truss cantilever to form a truss;

[0010] Step S2, installing and welding the purlins on the truss cantilever;

[0011] Step S3, installing a bird repeller bracket and a bird repeller at the cantilevered end of the truss, and installing the photovoltaic panel on the purlin through a photovoltaic fixing assembly;

[0012] Step S4, determining the platform number according to offshore needs, and installing an inverter bracket, an inverter, a grounding terminal, a hanging bracket and a ladder rack respectively under the cantilevered upper chord and the lower chord of the truss, and laying a DC cable;

[0013] Step S5, transporting the assembled tooling after the photovoltaic panel is installed to the leg installation station tooling, welding the legs, and installing the unfinished hanging bracket and ladder frame;

[0014] Step S6, transporting the assembled photovoltaic platform to the offshore construction site.

[0015] Preferably, the step S1 comprises:

[0016] Step S11, hoisting the middle main beam and the middle secondary beam to position the middle secondary beam and the middle main beam;

[0017] Step S12, installing the secondary beam and the symmetrical main beam from the middle to both sides;

[0018] Step S13, installing the main beams on the north and south sides, and installing the secondary beams from the middle to both sides, thereby completing the assembly of the truss pieces;

[0019] Step S14, installing upper and lower chord horizontal supports and the middle north-south cantilever, diagonal braces and horizontal supports;

[0020] Step S15, installing the north-south cantilever, diagonal braces and horizontal supports from the middle to both sides, thereby completing the assembly of the truss cantilever.

[0021] Preferably, in step S3, the photovoltaic fixing assembly includes a photovoltaic pressing block, an assembly frame, mounting hole fixing bolts and pressing block bolts, the photovoltaic pressing block and the assembly frame are tightly fitted, the photovoltaic pressing block is fixed to the purlin by the pressing block bolts, and the assembly frame is fixed to the purlin by the mounting hole fixing bolts; wherein the mounting hole fixing bolts and the pressing block bolts are both M8 bolts.

[0022] Preferably, step S5 comprises:

[0023] Step S51, lifting the assembled photovoltaic panels after installation along four electric rail car tracks by an electric rail car, and transporting them to the vicinity of the final assembly station;

[0024] Step S52, the electric rail vehicle places the assembled tooling after the photovoltaic panels are installed on the ground, and uses four 300t truck cranes to lift it onto the tooling at the leg installation station, and welds the legs;

[0025] Step S53, and install the unfinished hanging bracket and ladder frame.

[0026] Preferably, step S6 comprises:

[0027] Step S61, transporting the assembled photovoltaic platform along four electric rail tracks to a shipping station at the front of the wharf by an electric rail car;

[0028] Step S62, using an 8-point lifting beam to hook the photovoltaic platform, and lifting and lowering the platform to a special tooling of a transport ship;

[0029] Step S63, using iron chains to fix the legs on the special tooling, unhooking, and then transporting to the offshore construction site.

[0030] Preferably, in step S51 and step S61, four electric rail cars are arranged on every two tracks, and the track center distance is consistent with the spacing between the truss bases of the photovoltaic platform; a hydraulic jacking mechanism with a bracket is arranged on the electric rail car, and after the electric rail car drives under the truss base, it is lifted by the hydraulic jacking mechanism, and after lifting the photovoltaic platform, it is transported on the track.

[0031] Preferably, in step S62, the eight lifting points are located at the installation positions reserved in step S3, and are installed after being finally transported to the offshore construction site.

[0032] The beneficial effects of the present invention are as follows: the present invention provides a method for continuous assembly construction on land of an offshore photovoltaic platform. Compared with the installation of components at sea, this method reduces the number of offshore construction vessels and personnel, and transforms offshore construction into land construction. The method realizes truss sheet assembly, cantilever assembly, welding of purlins, photovoltaic panel installation and support leg installation in one, thereby realizing the continuous assembly construction of the photovoltaic platform on land. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of a construction method for continuous assembly of an offshore photovoltaic platform on land according to the present invention;

[0034] Figure 2 It is a specific flow chart of assembling truss pieces and assembling truss cantilevers to assemble trusses in the present invention;

[0035] Figure 3 It is a specific flow chart of the present invention for transferring the assembled tooling after the photovoltaic panel is installed to the tooling of the leg installation station, welding the legs, and installing the unfinished hanging bracket and ladder frame;

[0036] Figure 4 It is a specific flow chart of transporting the assembled photovoltaic platform to the offshore construction site in the present invention;

[0037] Figure 5 It is a partial structural diagram of the offshore photovoltaic platform of the present invention;

[0038] Figure 6It is another part of the structural diagram of the offshore photovoltaic platform of the present invention;

[0039] Figure 7 It is a structural diagram of the offshore photovoltaic platform of the present invention when it is installed on the outrigger installation station;

[0040] Figure 8 It is a schematic diagram of hoisting the middle main beam in the present invention;

[0041] Fig. 9 It is a schematic diagram of hoisting the middle secondary beam and positioning the middle secondary beam and the middle main beam in the present invention;

[0042] Fig.10 It is a schematic diagram of installing secondary beams and symmetrical main beams from the middle to both sides in the present invention;

[0043] Fig.11 It is a schematic diagram of installing the main beam on the south side in the present invention;

[0044] Fig.12 It is a schematic diagram of installing the main beam on the north side in the present invention;

[0045] Fig.13 It is a schematic diagram of installing the secondary beam from the middle to both sides in the present invention;

[0046] Fig.14 It is a schematic diagram of installing upper and lower chord horizontal supports in the present invention;

[0047] Fig.15 It is a schematic diagram of installing the middle north-south cantilever, diagonal brace and horizontal brace in the present invention;

[0048] Fig.16 It is a schematic diagram of installing north-south cantilever, diagonal brace and horizontal brace from the middle to both sides in the present invention;

[0049] Fig.17 is a structural diagram of the photovoltaic fixing assembly in the present invention;

[0050] Fig.18 It is a general plan layout of the continuous construction of the transport track of each tooling process of truss piece assembly, truss cantilever assembly, purlin welding, photovoltaic panel installation, and leg welding in the present invention;

[0051] Fig.19 It is a schematic diagram of the electric rail vehicle of the present invention;

[0052] Fig. 20 It is a schematic diagram of the hydraulic jacking mechanism on the electric rail vehicle in the present invention.

[0053] In the figure: 101, truss sheet; 102, truss cantilever; 103, purlin; 104, photovoltaic panel; 105, support leg; 1, main beam; 2, secondary beam; 3, upper and lower chord horizontal support; 4, north-south cantilever, diagonal brace and horizontal support; 5, photovoltaic pressure block; 6, component frame; 7, mounting hole fixing bolt; 8, pressure block bolt. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0055] The present invention will be further described below in conjunction with the accompanying drawings.

[0056] like Figure 1 , 5 -7, a construction method for continuous assembly of an offshore photovoltaic platform on land, the offshore photovoltaic platform is composed of a truss sheet 101, a truss cantilever 102, a purlin 103, a photovoltaic panel 104 and a leg 105, characterized in that it includes:

[0057] Step S1, assembling the truss plates 101 and the truss cantilevers 102 to form a truss.

[0058] like Figure 2 As shown, step S1 specifically includes:

[0059] Step S11, hoisting the middle main beam 1 and the middle secondary beam 2, so that the middle secondary beam 2 and the middle main beam 1 are positioned, as shown in FIG. Figure 8 , 9 shown.

[0060] Step S12, installing the secondary beam 2 and the symmetrical main beam 1 from the middle to both sides, such as Fig.10 shown.

[0061] Step S13, install the main beams 1 on the north and south sides, and install the secondary beams 2 from the middle to both sides, so as to complete the assembly of the truss sheet 101. Figure 11-13 shown.

[0062] Step S14, install the upper and lower chord horizontal supports 3 and the middle north-south cantilever, diagonal brace and horizontal support 4, as shown in FIG. Fig.14 , 15shown.

[0063] Step S15, install the north-south cantilever, diagonal brace and horizontal support 4 from the middle to both sides, and then complete the assembly of the truss cantilever 102. Fig.16 shown.

[0064] Step S2 , installing and welding the purlin 103 on the truss cantilever 102 .

[0065] Step S3, installing a bird repeller bracket and a bird repeller at the end of the truss cantilever 102, and installing the photovoltaic panel 104 on the purlin 103 through a photovoltaic fixing assembly.

[0066] In the embodiment, Fig.17 As shown, the photovoltaic fixing assembly includes a photovoltaic pressing block 5, an assembly frame 6, mounting hole fixing bolts 7 and pressing block bolts 8. The photovoltaic pressing block 5 and the assembly frame 6 are tightly fitted. The photovoltaic pressing block 5 is fixed to the purlin 103 by the pressing block bolts 8, and the assembly frame 6 is fixed to the purlin 103 by the mounting hole fixing bolts 7; wherein, the mounting hole fixing bolts 7 and the pressing block bolts 8 are both M8 bolts.

[0067] In the embodiment, the bird repeller is fastened to the bird repeller bracket with bolts. The bird repeller is made of corrosion-resistant material or coated with an anti-corrosion coating. The rotating part is flexible in rotation and durable.

[0068] Step S4, determine the platform number according to offshore needs, and install the inverter bracket, inverter, grounding terminal, hanging bracket and ladder rack respectively under the upper chord and lower chord of the truss cantilever 102, and lay the DC cable.

[0069] In the embodiment, the cable bridge is installed by a hanging bracket, and the hanging bracket is welded to the truss with a 50×50×4 square tube. The bridge models are 200×100, 300×150, 400×200, 600×200, hot-dip galvanized 90μm, CX anti-corrosion, fixedly installed on the hanging bracket, and the bridge cross-ground wire adopts a 16mm2 copper grounding wire, which is reliably grounded every 25m.

[0070] The DC cable uses H1Z2Z2-1×4DC1500V model cable with an outer diameter of about 5.6mm. It is laid along the purlin 103 and connected to the reserved points of the inverter and platform.

[0071] The inverter uses Huawei 300kW inverter, with dimensions of 1048×732×395mm and a weight of 112kg. The inverter is installed using a hanging bracket, and the inverter bracket is welded to the purlin 103 using a 75×75×4 square tube.

[0072] Step S5, transporting the assembled tooling after the photovoltaic panel 104 is installed to the leg installation station tooling, welding the legs 105, and installing the unfinished hanging brackets and ladder frames.

[0073] like Figure 3 As shown, step S5 specifically includes:

[0074] Step S51, the assembled tooling after the photovoltaic panels 104 are installed is lifted up by an electric rail car along four electric rail car tracks, and transported to the vicinity of the final assembly station.

[0075] In the embodiment, four electric rail vehicles are arranged on every two tracks. Fig.19 As shown in FIG. 1 , the track center distance is consistent with the distance between the truss bases of the photovoltaic platform; a hydraulic lifting mechanism with a bracket is arranged on the electric track trolley. After the electric track trolley travels under the truss base, it is lifted by the hydraulic lifting mechanism, and after lifting the photovoltaic platform, it is transported on the track. The hydraulic lifting mechanism is as shown in FIG. Fig. 20 shown.

[0076] Step S52 , the electric rail vehicle places the assembled tooling after the photovoltaic panels 104 are installed on the ground, and uses four 300t truck cranes to lift it onto the tooling at the leg installation station, and weld the legs 105 .

[0077] Step S53, and install the unfinished hanging bracket and ladder frame.

[0078] Step S6, transporting the assembled photovoltaic platform to the offshore construction site.

[0079] like Figure 4 As shown, step S6 includes:

[0080] Step S61, transporting the assembled photovoltaic platform via an electric rail car along four electric rail car tracks to a shipping station at the front of the wharf.

[0081] In the embodiment, four electric rail cars are arranged on every two tracks, and the center distance of the tracks is consistent with the spacing between the truss bases of the photovoltaic platform; a hydraulic jacking mechanism with a bracket is arranged on the electric rail car. After the electric rail car drives under the truss base, it is lifted by the hydraulic jacking mechanism, and after lifting the photovoltaic platform, it is transported on the track.

[0082] Step S62, use an 8-point lifting beam to hook the photovoltaic platform, lift it and lower it to the special tooling of the transport ship.

[0083] In the embodiment, the eight lifting points are located at the reserved installation positions in step S3, and are installed after being finally transported to the offshore construction site.

[0084] Step S63, use iron chains to fix the legs 105 on the special tooling, remove the hooks, and then transport them to the offshore construction site.

[0085] In the embodiment, the transport track of each tooling process of assembling the truss sheet 101, assembling the truss cantilever 102, welding the purlin 103, installing the photovoltaic panel 104, and welding the support leg 105 is as follows: Fig.18 shown.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for continuous assembly of an offshore photovoltaic platform on land, wherein the offshore photovoltaic platform is composed of a truss sheet (101), a truss cantilever (102), a purlin (103), a photovoltaic panel (104) and a leg (105), characterized in that: include: Step S1, assembling the truss sheets (101) and the truss cantilevers (102) to form a truss; Step S2, installing and welding the purlin (103) on the truss cantilever (102); Step S3, installing a bird repeller bracket and a bird repeller at the end of the truss cantilever (102), and installing the photovoltaic panel (104) on the purlin (103) through a photovoltaic fixing assembly; Step S4, determining the platform number according to offshore needs, and installing an inverter bracket, an inverter, a grounding terminal, a hanging bracket and a ladder rack respectively under the upper chord and the lower chord of the truss cantilever (102), and laying a DC cable; Step S5, transporting the assembled tooling after the photovoltaic panel (104) is installed to the leg installation station tooling, welding the legs (105), and installing the unfinished hanging bracket and ladder frame; Step S6, transporting the assembled photovoltaic platform to the offshore construction site.

2. A construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 1, characterized in that: The step S1 comprises: Step S11, hoisting the middle main beam (1) and the middle secondary beam (2), so that the middle secondary beam (2) and the middle main beam (1) are positioned; Step S12, installing the secondary beam (2) and the symmetrical main beam (1) from the middle to both sides; Step S13, installing the main beams (1) on the north and south sides, and installing the secondary beams (2) from the middle to both sides, thereby completing the assembly of the truss sheet (101); Step S14, installing the upper and lower chord horizontal supports (3) and the middle north-south cantilever, diagonal braces and horizontal supports (4); Step S15, installing the north-south cantilever, diagonal brace and horizontal support (4) from the middle to both sides, thereby completing the assembly of the truss cantilever (102).

3. The construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 1, characterized in that: In the step S3, the photovoltaic fixing assembly comprises a photovoltaic pressing block (5), an assembly frame (6), a mounting hole fixing bolt (7) and a pressing block bolt (8); the photovoltaic pressing block (5) and the assembly frame (6) are tightly fitted; the photovoltaic pressing block (5) is fixed to the purlin (103) by the pressing block bolt (8); and the assembly frame (6) is fixed to the purlin (103) by the mounting hole fixing bolt (7); wherein the mounting hole fixing bolt (7) and the pressing block bolt (8) are both M8 bolts.

4. The construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 1, characterized in that: The step S5 comprises: Step S51, using an electric rail car to lift up the assembled tooling after the photovoltaic panels (104) are installed along four electric rail car tracks, and transport them to the vicinity of the final assembly station; Step S52, the electric rail vehicle places the assembled tooling of the photovoltaic panel (104) after installation on the ground, and uses four 300t truck cranes to lift it onto the tooling of the leg installation station, and welds the leg (105); Step S53, and install the unfinished hanging bracket and ladder frame.

5. The construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 4, characterized in that: The step S6 comprises: Step S61, transporting the assembled photovoltaic platform along four electric rail tracks to a shipping station at the front of the wharf by an electric rail car; Step S62, using an 8-point lifting beam to hook the photovoltaic platform, and lifting and lowering the platform to a special tooling of a transport ship; Step S63, using iron chains to fix the legs (105) on the special tooling, unhooking, and then transporting to the offshore construction site.

6. A construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 5, characterized in that: In step S51 and step S61, four electric rail cars are arranged on every two tracks, and the center distance of the tracks is consistent with the spacing between the truss bases of the photovoltaic platform; a hydraulic jacking mechanism with a bracket is arranged on the electric rail car, and after the electric rail car travels under the truss base, it is lifted by the hydraulic jacking mechanism, and after lifting the photovoltaic platform, it is transported on the track.

7. The construction method for continuous assembly of offshore photovoltaic platforms on land according to claim 5, characterized in that: In step S62, the eight lifting points are located at the installation positions reserved in step S3, and are installed after being finally transported to the offshore construction site.

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