Hoisting method of offshore photovoltaic platform

Abstract

The invention discloses a hoisting method for an offshore photovoltaic platform. An adopted hoisting device comprises a hoisting frame, four hoops, a set of upper sling, a set of lower sling and two fulcrum seat steel wire ropes. The lifting frame comprises a top frame, four lifting lugs and two pairs of front and rear lifting rods; the top frame is a rectangular grid frame, and the four lifting lugs are fixed to the top faces of the four corners of the top frame. The two pairs of front and rear suspenders are fixed on the bottom surface of the top frame and are symmetrically positioned on the front and rear sides of the fulcrum seats at the bottoms of the two front and rear supporting legs; the four hoops are mounted in the middles of four fulcrum seats of the photovoltaic platform; one set of upper sling comprises four upper steel wire ropes connected between the four lifting lugs and the hoisting equipment; the lower sling comprises four pairs of lower steel wire ropes connected between the lower ends of the two pairs of front and rear suspenders and the four hoops; and the two fulcrum seat steel wire ropes are connected between the hoops at the bottoms of the two front and rear support legs. The installation efficiency of the photovoltaic platform can be effectively improved, and the offshore operation time is greatly shortened.

Description

Technical Field

[0001] The invention relates to a hoisting method for an offshore photovoltaic platform. Background Art

[0002] Offshore photovoltaics is a new way to utilize marine energy. Offshore photovoltaics is to build solar photovoltaic power generation systems in marine environments such as offshore and mudflats. With its advantages of rich resources and high efficiency, it has become a new favorite in the field of solar energy utilization. The current offshore photovoltaic structures are floating and pile-fixed. The photovoltaic platform unit of the pile-fixed structure includes a photovoltaic platform and four piles driven on the sea. The photovoltaic platform is a truss structure and includes a photovoltaic platform body and four legs connected to the bottom of the photovoltaic platform body. A fulcrum seat is provided at the bottom of each leg, and photovoltaic panels are installed on the top surface of the photovoltaic platform body. The height of the first two legs of the four legs is greater than that of the last two legs. A connecting seat is provided on the top of each of the four pile foundations, which is used to dock with the four fulcrum seats of the photovoltaic platform one by one, so that the photovoltaic platform body is tilted 15° in a way that the front is high and the back is low. The existing hoisting method of the photovoltaic platform is to reserve four hoisting holes corresponding to the four fulcrum seats on the main body of the photovoltaic platform (without installing photovoltaic panels), and to use the four lifting ears on the rectangular hanger to extend four steel wire ropes from the four hoisting holes one by one to connect with the four fulcrum seats and then lift them. After the four fulcrum seats of the photovoltaic platform are connected to the four pile foundations, the photovoltaic panels at the four hoisting holes are installed at sea, which not only increases the time of offshore operations, but also poses huge risks to human work at high altitudes in the marine environment. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for hoisting an offshore photovoltaic platform, which can effectively improve the installation efficiency of the photovoltaic platform, greatly reduce the offshore operation time, and has higher safety.

[0004] The object of the present invention is achieved as follows: A method for hoisting an offshore photovoltaic platform is used to hoist the photovoltaic platform to a pile foundation with four axis connecting lines in a rectangular shape set on the sea;

[0005] The photovoltaic platform comprises a photovoltaic platform body, two front legs connected to the front bottom of the photovoltaic platform body, two rear legs connected to the rear bottom of the photovoltaic platform body, and four inverted truncated cone-shaped support seats connected to the bottoms of the two front legs and the two rear legs one by one and docked with the top connection seats of four pile foundations one by one; the height of the front legs is greater than that of the rear legs; the hoisting method is based on a hoisting device for an offshore photovoltaic platform, which comprises a hanger, four hoops, a set of upper slings, a set of lower slings and two fulcrum seat steel wire ropes; wherein,

[0006] The hanger comprises a top frame, four lifting ears, two pairs of front hanging rods and two pairs of rear hanging rods;

[0007] The top frame is a rectangular grid frame, the width of the top frame is greater than the width of the photovoltaic platform body, and the length of the top frame is less than the length of the photovoltaic platform body but greater than the lateral spacing of the fulcrum seats of the photovoltaic platform;

[0008] Four lifting ears are fixed one by one on the top surfaces of the four corners of the top frame;

[0009] The length of the front suspension rod is greater than the vertical distance between the front end of the top surface of the photovoltaic platform body and the rear end of the top surface, but less than the vertical distance between the front end of the top surface of the photovoltaic platform body and the fulcrum seat; two pairs of front suspension rods are fixed one by one on the bottom surface of the top frame and are one by one and symmetrically located on both sides in front of the fulcrum seat at the bottom of the two front legs;

[0010] The length of the rear suspension rod is the same as that of the front suspension rod; two pairs of rear suspension rods are fixed on the bottom surface of the top frame in a one-to-one correspondence and are located in a one-to-one correspondence and symmetrically on both sides of the rear of the fulcrum seats at the bottom of the two rear legs;

[0011] The longitudinal spacing between a pair of front suspension rods and a pair of rear suspension rods is equal to the width of the photovoltaic platform body L+0.5m~3m;

[0012] Four clamps are installed one by one in the middle of the four supporting seats of the photovoltaic platform; each clamp includes two semicircular hoop plates and two sets of fastening bolts; a first connecting ring is fixed in the middle of the outer surface of one hoop plate, and a second connecting ring and a third connecting ring are fixed at intervals in the middle of the outer surface of another hoop plate;

[0013] A set of upper slings includes four upper steel wire ropes, the lower ends of the four upper steel wire ropes are connected to the four lifting ears of the hanger one by one, and the upper ends of the four upper steel wire ropes are connected to the main hook of the lifting equipment;

[0014] A set of lower slings includes four pairs of lower steel wire ropes, the upper ends of the four pairs of lower steel wire ropes are connected to the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods one by one, and the lower ends of the four pairs of lower steel wire ropes are connected to the second connection rings and the third connection rings of the four hoops one by one;

[0015] The length of the fulcrum seat steel wire rope is adapted to the longitudinal spacing of the fulcrum seat of the photovoltaic platform; one end of the two fulcrum seat steel wire ropes is connected to the first connecting ring of the clamp on the fulcrum seat at the bottom of the two front legs in a one-to-one correspondence, and the other end of the two fulcrum seat steel wire ropes is connected to the first connecting ring of the clamp on the fulcrum seat at the bottom of the two rear legs in a one-to-one correspondence;

[0016] The hoisting method uses two hangers, two sets of upper slings and two sets of lower slings, and includes the following steps:

[0017] Step 1: firstly, the lower ends of the four upper steel wire ropes of the first set of upper slings are connected one by one to the four lifting ears on the first hanger, and the upper ends of the four upper steel wire ropes of the first set of upper slings are connected to the main hook of the land crane, and then the upper ends of the four pairs of lower steel wire ropes of the first set of lower slings are connected one by one to the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods of the first hanger;

[0018] Step 2: First, install a clamp on each of the four support seats of the photovoltaic platform, and then install two support seat steel wire ropes on the four clamps;

[0019] Step 3: After the land crane lowers the first hanger to a suitable height, the lower ends of the four pairs of lower steel wire ropes of the first set of lower slings are connected one by one to the second connecting ring and the third connecting ring on the clamps of the four supporting seats of the photovoltaic platform;

[0020] Step 4: First, lift and move the photovoltaic platform to the top of the transport barge by using a land crane, then lower it and place the photovoltaic platform on the transport barge. Then, untie the connection between the lower ends of the four pairs of lower steel wire ropes of the first set of lower slings and the clamps on the four fulcrum seats of the photovoltaic platform, so that the first set of lower slings, the first hanger and the first set of upper slings are separated from the photovoltaic platform on the transport barge, and then the photovoltaic platform is transported to the offshore construction site by the transport barge.

[0021] Step 5: Before the transport barge arrives at the offshore construction site, connect the lower ends of the four upper steel wire ropes of the second set of upper slings to the four lifting ears on the second hanger, and connect the upper ends of the four upper steel wire ropes of the second set of upper slings to the main hook of the crane ship, and then connect the upper ends of the four pairs of lower steel wire ropes of the second set of lower slings to the lower ends of the two pairs of front booms and the two pairs of rear booms of the second hanger in a one-to-one correspondence;

[0022] After the transport barge arrives at the offshore construction site, the crane ship moves to the side of the transport barge. The main hook of the crane ship moves the second hanger to the top of the photovoltaic platform and lowers it to a suitable height. The operators on the transport barge connect the lower ends of the four pairs of lower steel wire ropes of the second set of lower slings to the second and third connecting rings on the clamps of the four fulcrum seats of the photovoltaic platform one by one;

[0023] Step 6: Lift the photovoltaic platform with the main hook of the crane ship, and move the photovoltaic platform to the four pile foundations set up in advance at sea, and connect the four supporting seats of the photovoltaic platform with the connecting seats on the top of the four pile foundations one by one;

[0024] Step seven, after the four fulcrum seats of the photovoltaic platform are connected one by one with the four pile foundations, the operators on the transport barge are first transported to the four fulcrum seats of the photovoltaic platform by the telescopic working arm on the crane ship, and the operators untie the connection between the lower ends of the four pairs of lower steel wire ropes of the second set of lower slings and the hoops on the four fulcrum seats, and separate the second set of lower slings, the second hanger and the second set of upper slings from the photovoltaic platform, and then manually open the hoops on the four fulcrum seats, and the crane ship will send the removed four hoops and two fulcrum seat steel wire ropes back to the transport barge.

[0025] The above-mentioned method for hoisting an offshore photovoltaic platform, wherein the top frame includes two horizontal beams, two longitudinal beams, a plurality of longitudinal struts spanning between the two horizontal beams and a plurality of horizontal struts spanning between the two longitudinal beams; a front diagonal strut is respectively connected between the lower portion of the two pairs of front suspension rods and the bottom surface of the top frame; a rear diagonal strut is respectively connected between the lower portion of the two pairs of rear suspension rods and the bottom surface of the top frame.

[0026] In the above-mentioned method for hoisting an offshore photovoltaic platform, a lifting ring is fixed to the lower end of each of the two pairs of front lifting rods and the lower end of each of the two pairs of rear lifting rods, so that the upper ends of the four pairs of lower steel wire ropes are connected one by one to the lifting rings at the lower ends of the two pairs of front lifting rods and the lifting rings at the lower ends of the two pairs of rear lifting rods.

[0027] The hoisting method of the offshore photovoltaic platform of the present invention has the following characteristics:

[0028] The hoisting device used in the present invention mainly includes a hanger, a set of upper slings connected to the hanger and the main hook of the lifting equipment, four hoops installed on the four fulcrum seats of the photovoltaic platform, two fulcrum seat steel wire ropes connected between the four hoops, and a set of lower slings connected between the hanger and the four hoops. The present invention uses a hoisting device combined with a lifting equipment and a transport barge to quickly and conveniently lift the photovoltaic platform to the sea and install it on four pile foundations. The hoisting method of the present invention can effectively improve the installation efficiency of the photovoltaic platform, and there is no need to reserve installation holes on the main body of the photovoltaic platform, which greatly reduces the offshore operation time and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a side view of an offshore photovoltaic platform involved in the present invention;

[0030] Figure 2 is a side view of a hoisting device for an offshore photovoltaic platform of the present invention;

[0031] Figure 3 is a top view of a hoisting device for an offshore photovoltaic platform of the present invention;

[0032] Figure 4 It is a bottom view of the hoisting device of the offshore photovoltaic platform of the present invention;

[0033] Figure 5 It is a schematic structural diagram of a clamp in a hoisting device for an offshore photovoltaic platform of the present invention;

[0034] Figure 6 is a side view of the process of performing step 2 of the method for hoisting an offshore photovoltaic platform of the present invention;

[0035] Figure 7 is a side view of the process of performing step 3 of the method for hoisting an offshore photovoltaic platform of the present invention;

[0036] Figure 8 is a side view of the process of performing step 4 of the method for hoisting an offshore photovoltaic platform of the present invention;

[0037] Fig. 9 It is a side view of the step six of the method for hoisting an offshore photovoltaic platform of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] See also Figures 1 to 5 The method for hoisting an offshore photovoltaic platform of the present invention is used to hoist a photovoltaic platform 1 onto four rectangular pile foundations 100 with axis connecting lines set in the sea.

[0040] The photovoltaic platform 1 includes a photovoltaic platform body 10, two front legs 12 connected to the front bottom of the photovoltaic platform body 10, two rear legs 13 connected to the rear bottom of the photovoltaic platform body 10, and four inverted truncated cone-shaped support seats 13 connected to the bottoms of the two front legs 11 and the two rear legs 12 in a one-to-one correspondence and connected to the connection seats at the tops of the four pile foundations 100 in a one-to-one correspondence; the height of the front legs 11 is greater than the height of the rear legs 12 (see Figure 1 ).

[0041] The method for hoisting an offshore photovoltaic platform of the present invention is based on a hoisting device for an offshore photovoltaic platform, which comprises a hanger 2, four hoops 3, a set of upper slings, a set of lower slings and two fulcrum seat steel wire ropes 6.

[0042] The hanger 2 includes a top frame 20, four lifting ears 21, two pairs of front hanging rods 22 and two pairs of rear hanging rods 23; wherein,

[0043] The top frame 20 is a rectangular grid frame and includes two horizontal beams, two longitudinal beams, a plurality of longitudinal bracing rods spanning between the two horizontal beams, and a plurality of transverse bracing rods spanning between the two longitudinal beams; the width of the top frame 20 is greater than the width of the photovoltaic platform body 10, and the length of the top frame 20 is less than the length of the photovoltaic platform body 10 but greater than the lateral spacing of the support seats 13 of the photovoltaic platform 1;

[0044] The four lifting ears 21 are fixed on the top surfaces of the four corners of the top frame 20 in a one-to-one correspondence;

[0045] The length of the front suspension rod 22 is greater than the vertical distance between the front end of the top surface and the rear end of the top surface of the photovoltaic platform body 10, but less than the vertical distance between the front end of the top surface and the fulcrum seat 13 of the photovoltaic platform body 10; the two pairs of front suspension rods 22 are fixed on the bottom surface of the top frame 20 in a one-to-one correspondence and are symmetrically located on both sides in front of the fulcrum seat 13 at the bottom of the two front legs 11; a suspension ring is fixed to the lower end of each of the two pairs of front suspension rods 22; and a front diagonal brace rod 220 is also connected between the lower part of the two pairs of front suspension rods 22 and the bottom surface of the top frame 20;

[0046] The length of the rear suspension rod 23 is the same as that of the front suspension rod 22; the two pairs of rear suspension rods 23 are fixed on the bottom surface of the top frame 20 in a one-to-one correspondence and are symmetrically located on both sides of the rear of the fulcrum seat 13 at the bottom of the two rear legs 12 in a one-to-one correspondence; a suspension ring is fixed to the lower end of each of the two pairs of rear suspension rods 23; a rear diagonal brace rod 230 is connected between the lower part of the two pairs of rear suspension rods 23 and the bottom surface of the top frame 20;

[0047] The longitudinal distance between the pair of front suspension rods 22 and the pair of rear suspension rods 23 is equal to the width L+0.5m-3m of the photovoltaic platform body 10 .

[0048] The four clamps 3 are installed one by one in the middle of the four fulcrum seats 13 of the photovoltaic platform 1; each clamp 3 includes two semicircular hoop plates 30 and two sets of fastening bolts 34; a first connecting ring 31 is fixed in the middle of the outer surface of one hoop plate 30, and a second connecting ring 32 and a third connecting ring 33 are fixed at intervals in the middle of the outer surface of the other hoop plate 30; the fastening bolts 34 can fasten the two hoop plates 30 when they are clamped on the fulcrum seat 13.

[0049] A set of upper slings includes four upper steel wire ropes 4, the lower ends of which are connected to four lifting ears 21 of the hanger 2 one by one, and the upper ends of the four upper steel wire ropes 4 are all connected to the main hook of the lifting equipment.

[0050] A set of lower slings includes four pairs of lower steel ropes 5, the upper ends of the four pairs of lower steel ropes 5 are connected one by one to the lifting rings at the lower ends of the two pairs of front suspension rods 22 and the lifting rings at the lower ends of the two pairs of rear suspension rods 23 through shackles, and the lower ends of the four pairs of lower steel ropes 5 are connected one by one to the second connecting rings 32 and the third connecting rings 33 of the four hoops 3 through shackles.

[0051] The length of the fulcrum seat steel wire rope 6 is adapted to the longitudinal spacing of the fulcrum seat 13 of the photovoltaic platform 1; one end of the two fulcrum seat steel wire ropes 6 is connected one by one to the first connecting ring 31 of the clamp 3 on the fulcrum seat 13 at the bottom of the two front legs 11, and the other end of the two fulcrum seat steel wire ropes 6 is connected one by one to the first connecting ring 31 of the clamp 3 on the fulcrum seat 13 at the bottom of the two rear legs 12.

[0052] In the hanger 2 of the hoisting device of the offshore photovoltaic platform of the present invention, the longitudinal spacing between a pair of front suspension rods 22 and a pair of rear suspension rods 23 is equal to the width L+0.5m~3m of the photovoltaic platform body 10, so as to avoid the shaking of the photovoltaic platform 1 during lifting and hitting the front suspension rods 22 and the rear suspension rods 23; the two fulcrum seat steel wire ropes 6 can constrain the distance between the fulcrum seat 13 at the bottom of the two front legs 11 and the fulcrum seat 13 at the bottom of the two rear legs 12; when the photovoltaic platform 1 is officially lifted, the two fulcrum seat steel wire ropes 6 can bear the horizontal pulling force exerted on the fulcrum seat 13 in the front and rear directions of the photovoltaic platform 1.

[0053] See also Figures 6 to 9 The method for hoisting an offshore photovoltaic platform of the present invention uses two hangers 2, two sets of upper slings and two sets of lower slings, and includes the following steps:

[0054] Step 1: first, connect the lower ends of the four upper steel wire ropes 4 of the first set of upper slings to the four lifting ears 21 on the first hanger 2 one by one, and connect the upper ends of the four upper steel wire ropes 4 of the first set of upper slings to the main hook of the land crane 200, and then connect the upper ends of the four pairs of lower steel wire ropes 5 of the first set of lower slings to the lower ends of the two pairs of front suspension rods 22 and the two pairs of rear suspension rods 23 of the first hanger 2 one by one;

[0055] Step 2: First, install a clamp 3 on each of the four support seats 13 of the photovoltaic platform 1, and then install two support seat steel wire ropes 6 on the four clamps 3 (see Figure 6 );

[0056] Step 3: After the land crane 200 lowers the first hanger 2 to a suitable height, the lower ends of the four pairs of lower steel wire ropes 5 of the first set of lower slings are connected one by one to the second connecting ring 32 and the third connecting ring 33 on the clamp 3 of the four supporting seats 13 of the photovoltaic platform 2 (see FIG. Figure 7 );

[0057] Step 4: First, lift and move the photovoltaic platform 1 to the top of the transport barge 300 by the land crane 200 and then lower it (see Figure 8), place the photovoltaic platform 1 on the transport barge 300, then untie the connection between the lower ends of the four pairs of lower steel wire ropes 5 of the first set of lower slings and the clamps 3 on the four fulcrum seats 13 of the photovoltaic platform 1, so that the first set of lower slings, the first hanger and the first set of upper slings are separated from the photovoltaic platform 1 on the transport barge 300, and then the photovoltaic platform 1 is transported to the offshore construction site by the transport barge 300;

[0058] Step 5: Before the transport barge arrives at the offshore construction site, the lower ends of the four upper steel wire ropes 4 of the second set of upper slings are connected to the four lifting ears 21 on the second hanger 2, and the upper ends of the four upper steel wire ropes 4 of the second set of upper slings are connected to the main hook of the crane ship 400, and then the upper ends of the four pairs of lower steel wire ropes 5 of the second set of lower slings are connected one by one to the lower ends of the two pairs of front suspension rods 22 and the two pairs of rear suspension rods 23 of the second hanger 2;

[0059] After the transport barge 300 arrives at the offshore construction site, the crane ship 400 moves to the side of the transport barge 300. The main hook of the crane ship 400 moves the second hanger 2 to the top of the photovoltaic platform 1 and lowers it to a suitable height. Then, the operator on the transport barge 30 connects the lower ends of the four pairs of lower steel wire ropes 5 of the second set of lower slings to the second connecting rings 32 and the third connecting rings 33 on the clamps 3 of the four fulcrum seats 13 of the photovoltaic platform 1 one by one.

[0060] Step 6: lift the photovoltaic platform 1 by the main hook of the crane ship 400, and move the photovoltaic platform 1 to the four pile foundations 100 set up in advance at sea, and connect the four supporting seats 13 of the photovoltaic platform 1 to the connecting seats on the top of the four pile foundations 100 one by one (see Fig. 9 );

[0061] Step seven, after completing the docking of the four supporting seats 13 of the photovoltaic platform 1 with the four pile foundations 100 one by one, first use the telescopic working arm on the crane ship 400 to transport the workers on the transport barge 300 to the four supporting seats 13 of the photovoltaic platform 1, and have the workers untie the connection between the lower ends of the four pairs of lower steel wire ropes 5 of the second set of lower slings and the hoops 3 on the four supporting seats 13, separate the second set of lower slings, the second hanger 2 and the second set of upper slings from the photovoltaic platform 1, and then manually open the hoops 3 on the four supporting seats 13, and have the crane ship 400 return the removed four hoops 3 and the two supporting seat steel wire ropes 6 to the transport barge 300.

[0062] The method for hoisting an offshore photovoltaic platform of the present invention can transport the photovoltaic platform 1 without using a transport barge 300, and only use a crane ship 400 to complete the transportation and installation tasks of the photovoltaic platform 1, so that one hanger 2, one set of upper slings and one set of lower slings can be used less. The shackles at both ends of the four pairs of lower steel wire ropes 5 can also be replaced by other methods.

[0063] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for hoisting an offshore photovoltaic platform, which is used to hoist the photovoltaic platform to a pile foundation with four axes connected in a rectangular shape and set on the sea; the photovoltaic platform comprises a photovoltaic platform body, two front legs connected to the front bottom of the photovoltaic platform body, two rear legs connected to the rear bottom of the photovoltaic platform body, and four inverted truncated cone-shaped fulcrum seats which are connected to the bottoms of the two front legs and the two rear legs in a one-to-one correspondence and are connected to the top connecting seats of the four pile foundations in a one-to-one correspondence; the height of the front legs is greater than that of the rear legs; the hoisting method is based on a hoisting device for an offshore photovoltaic platform, which comprises a hanger, four hoops, a set of upper slings, a set of lower slings and two fulcrum seat steel wire ropes; it is characterized in that The hanger comprises a top frame, four lifting ears, two pairs of front hanging rods and two pairs of rear hanging rods; The top frame is a rectangular grid frame, the width of the top frame is greater than the width of the photovoltaic platform body, and the length of the top frame is less than the length of the photovoltaic platform body but greater than the lateral spacing of the fulcrum seats of the photovoltaic platform; Four lifting ears are fixed one by one on the top surfaces of the four corners of the top frame; The length of the front suspension rod is greater than the vertical distance between the front end of the top surface of the photovoltaic platform body and the rear end of the top surface, but less than the vertical distance between the front end of the top surface of the photovoltaic platform body and the fulcrum seat; two pairs of front suspension rods are fixed one by one on the bottom surface of the top frame and are one by one and symmetrically located on both sides in front of the fulcrum seat at the bottom of the two front legs; The length of the rear suspension rod is the same as that of the front suspension rod; two pairs of rear suspension rods are fixed on the bottom surface of the top frame in a one-to-one correspondence and are located in a one-to-one correspondence and symmetrically on both sides of the rear of the fulcrum seats at the bottom of the two rear legs; The longitudinal spacing between a pair of front suspension rods and a pair of rear suspension rods is equal to the width of the photovoltaic platform body L+0.5m~3m; Four clamps are installed one by one in the middle of the four supporting seats of the photovoltaic platform; each clamp includes two semicircular hoop plates and two sets of fastening bolts; a first connecting ring is fixed in the middle of the outer surface of one hoop plate, and a second connecting ring and a third connecting ring are fixed at intervals in the middle of the outer surface of another hoop plate; A set of upper slings includes four upper steel wire ropes, the lower ends of the four upper steel wire ropes are connected to the four lifting ears of the hanger one by one, and the upper ends of the four upper steel wire ropes are connected to the main hook of the lifting equipment; A set of lower slings includes four pairs of lower steel wire ropes, the upper ends of the four pairs of lower steel wire ropes are connected to the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods one by one, and the lower ends of the four pairs of lower steel wire ropes are connected to the second connection rings and the third connection rings of the four hoops one by one; The length of the fulcrum seat steel wire rope is adapted to the longitudinal spacing of the fulcrum seat of the photovoltaic platform; one end of the two fulcrum seat steel wire ropes is connected to the first connecting ring of the clamp on the fulcrum seat at the bottom of the two front legs in a one-to-one correspondence, and the other end of the two fulcrum seat steel wire ropes is connected to the first connecting ring of the clamp on the fulcrum seat at the bottom of the two rear legs in a one-to-one correspondence; The hoisting method uses two hangers, two sets of upper slings and two sets of lower slings, and includes the following steps: Step 1: firstly, the lower ends of the four upper steel wire ropes of the first set of upper slings are connected one by one to the four lifting ears on the first hanger, and the upper ends of the four upper steel wire ropes of the first set of upper slings are connected to the main hook of the land crane, and then the upper ends of the four pairs of lower steel wire ropes of the first set of lower slings are connected one by one to the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods of the first hanger; Step 2: First, install a clamp on each of the four support bases of the photovoltaic platform, and then install two support base steel wire ropes on the four clamps; Step 3: After the land crane lowers the first hanger to a suitable height, the lower ends of the four pairs of lower steel wire ropes of the first set of lower slings are connected one by one to the second connecting ring and the third connecting ring on the clamps of the four supporting seats of the photovoltaic platform; Step 4: First, lift and move the photovoltaic platform to the top of the transport barge by using a land crane, then lower it and place the photovoltaic platform on the transport barge. Then, untie the connection between the lower ends of the four pairs of lower steel wire ropes of the first set of lower slings and the clamps on the four fulcrum seats of the photovoltaic platform, so that the first set of lower slings, the first hanger and the first set of upper slings are separated from the photovoltaic platform on the transport barge, and then the photovoltaic platform is transported to the offshore construction site by the transport barge. Step 5: Before the transport barge arrives at the offshore construction site, connect the lower ends of the four upper steel wire ropes of the second set of upper slings to the four lifting ears on the second hanger, and connect the upper ends of the four upper steel wire ropes of the second set of upper slings to the main hook of the crane ship, and then connect the upper ends of the four pairs of lower steel wire ropes of the second set of lower slings to the lower ends of the two pairs of front booms and the two pairs of rear booms of the second hanger in a one-to-one correspondence; After the transport barge arrives at the offshore construction site, the crane ship moves to the side of the transport barge. The main hook of the crane ship moves the second hanger to the top of the photovoltaic platform and lowers it to a suitable height. The operators on the transport barge connect the lower ends of the four pairs of lower steel wire ropes of the second set of lower slings to the second and third connecting rings on the clamps of the four fulcrum seats of the photovoltaic platform one by one; Step 6: Lift the photovoltaic platform with the main hook of the crane ship, and move the photovoltaic platform to the four pile foundations set up in advance at sea, and connect the four supporting seats of the photovoltaic platform with the connecting seats on the top of the four pile foundations one by one; Step seven, after the four fulcrum seats of the photovoltaic platform are connected one by one with the four pile foundations, the operators on the transport barge are first transported to the four fulcrum seats of the photovoltaic platform by the telescopic working arm on the crane ship, and the operators untie the connection between the lower ends of the four pairs of lower steel wire ropes of the second set of lower slings and the hoops on the four fulcrum seats, and separate the second set of lower slings, the second hanger and the second set of upper slings from the photovoltaic platform, and then manually open the hoops on the four fulcrum seats, and the crane ship will send the removed four hoops and two fulcrum seat steel wire ropes back to the transport barge.

2. The method for hoisting an offshore photovoltaic platform according to claim 1, characterized in that: The top frame includes two cross beams, two longitudinal beams, a plurality of longitudinal struts spanning between the two cross beams, and a plurality of cross struts spanning between the two longitudinal beams; a front diagonal strut is respectively connected between the lower parts of the two pairs of front suspension rods and the bottom surface of the top frame; a rear diagonal strut is respectively connected between the lower parts of the two pairs of rear suspension rods and the bottom surface of the top frame.

3. The method for hoisting an offshore photovoltaic platform according to claim 1, characterized in that: A lifting ring is fixed to the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods respectively, so that the upper ends of the four pairs of lower steel wire ropes are connected to the lifting rings at the lower ends of the two pairs of front suspension rods and the lower ends of the two pairs of rear suspension rods in a one-to-one correspondence.

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