An access platform for offshore photovoltaic platforms and method of use thereof

Abstract

The application discloses a kind of overhauling platform of offshore photovoltaic platform, including floating platform and two sets of push ladder.The floating platform includes from bottom to top buoyancy platform, work platform and two push ladder resting platforms;Work platform is fixed above main buoyancy platform by support column, and two push ladder resting platforms are correspondingly installed on two pairs of hydraulic lifting oil cylinders, so that the length direction of two push ladder resting platforms is perpendicular to the length direction of work platform;The length of each push ladder resting platform is adapted to the width of the work platform;Two sets of push ladder are correspondingly provided on two push ladder resting platforms;Each set of push ladder at least includes front push ladder and rear push ladder connected at head and tail;The front push ladder and rear push ladder of each set of push ladder are arranged in parallel on a single push ladder resting platform with the length direction perpendicular to the length direction of work platform.The application also discloses a method for using the overhauling platform.The application can provide a safe working surface for the operation and maintenance of large-span offshore photovoltaic platform.

Description

Technical Field

[0001] This invention relates to a maintenance platform for offshore photovoltaic platforms and a method for using the same. Background Technology

[0002] Currently, most photovoltaic power plants in my country are onshore, especially large-scale onshore photovoltaic bases in the Northwest region. Offshore photovoltaic power plants represent a new way of utilizing marine energy, and with their advantages of abundant resources and high efficiency, they have become a new favorite in the field of solar energy utilization. my country has a long coastline, vast sea areas, and abundant solar energy resources in its coastal areas. Vigorously developing marine new energy sources will become an important support for my country's energy structure transformation and marine strategy.

[0003] During long-term operation, offshore photovoltaic (PV) power plant equipment is subject to harsh environmental conditions such as seawater, salt spray, and ultraviolet radiation, leading to equipment aging and subsequent malfunctions. Equipment maintenance is crucial for ensuring the long-term operation of offshore PV equipment. Due to the height, wide span, and location of offshore PV platforms, maintenance is extremely difficult, thus necessitating a maintenance device suitable for offshore PV equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing systems and provide a maintenance platform for offshore photovoltaic platforms and its usage method. It can adapt to the complex and ever-changing marine operating environment and provide a safe working surface for the operation and maintenance of large-span offshore photovoltaic platforms.

[0005] One technical solution to achieve the objective of this invention is: a maintenance platform for an offshore photovoltaic platform, comprising a floating platform and two sets of push ladders, wherein,

[0006] The floating platform includes, from bottom to top, a buoyancy platform, a working platform, and two ladder support platforms;

[0007] The buoyancy platform is made of steel pipe and includes a rectangular main buoyancy platform, an isosceles trapezoidal platform bow connected to the front end of the main buoyancy platform, and two platform stern wings connected to the rear ends of the main buoyancy platform respectively; the width of the main buoyancy platform is adapted to the distance between the piles of the two adjacent photovoltaic supports.

[0008] The working platform is made of steel pipe and is rectangular in shape to fit the main buoyancy platform. It is fixed above the main buoyancy platform by support columns. The working platform is equipped with four mooring winches, two outboard propellers, two high-holding anchors, and two pairs of hydraulic lifting cylinders. The four mooring winches are evenly distributed at the four corners of the working platform. The two outboard propellers are located at the rear end of the working platform, one on the left and one on the right. The two high-holding anchors are respectively located at the middle of the front end and the middle of the rear end of the working platform through anchor winches. The two pairs of hydraulic lifting cylinders are installed at the middle-front and middle-rear of the working platform.

[0009] Two push ladder support platforms are installed on two pairs of hydraulic lifting cylinders in a one-to-one correspondence, so that the length direction of the two push ladder support platforms is perpendicular to the length direction of the working platform; the length of each push ladder support platform is adapted to the width of the working platform.

[0010] Two sets of push ladders are installed on two push ladder support platforms in a one-to-one correspondence; each set of push ladders includes at least a front push ladder and a rear push ladder connected end to end; the front push ladder and the rear push ladder of each set of push ladders are arranged parallel to each other on a single push ladder support platform with their length direction perpendicular to the length direction of the working platform.

[0011] The aforementioned maintenance platform for the offshore photovoltaic platform includes a rear push ladder comprising a rear bottom level, a rear walkway platform, and a rear railing. The rear bottom level comprises two rear lower longitudinal main beams, several rear lower transverse main beams spanning between the two rear lower longitudinal main beams, and two rear lower push ladder connecting rings corresponding to the front ends of the two rear lower longitudinal main beams. The rear walkway platform is connected above the rear bottom level by multiple vertical support rods and diagonal braces. The rear walkway platform comprises two rear upper longitudinal main beams, several rear upper transverse main beams spanning between the two rear upper longitudinal main beams, and two rear upper push ladder connecting rings corresponding to the front ends of the two rear upper longitudinal main beams. The rear railing connects both sides of the rear walkway platform and comprises multiple rear railing posts hinged to the rear upper longitudinal main beams of the rear walkway platform, multiple rear railing crossbars hinged between adjacent rear railing posts, and rear railing handrails hinged to the top of the rear railing posts.

[0012] The front push ladder includes a front base level, a front walkway platform, and a front railing. The front base level includes two front lower longitudinal main beams, several front lower transverse main beams spanning between the two front lower longitudinal main beams, and two corresponding rear push ladder connecting rings connected to the rear ends of the two front lower longitudinal main beams. The front parts of the two front lower longitudinal main beams are curved upwards. The front walkway platform is connected above the front base level by multiple vertical support rods and diagonal braces. The front walkway platform includes two front upper longitudinal main beams, several front upper longitudinal main beams spanning between the two front upper longitudinal main beams, and a front lower push ladder connecting rings. The upper transverse main beam and two corresponding upper push ladder connecting rings are connected to the rear ends of the two upper longitudinal main beams; the distance between the front end of the front bottom layer of the front push ladder and the front end of the front walkway platform is three-tenths of the distance between the rear end of the front bottom layer and the rear end of the front walkway platform; the front railing is connected to both sides of the front walkway platform, and the front railing includes multiple front railing posts hinged to the front longitudinal main beam of the front walkway platform, multiple front railing crossbars hinged between adjacent front railing posts, and front railing handrails hinged to the top of the front railing posts.

[0013] The front upper push ladder connecting ring and the front lower push ladder connecting ring of the front push ladder are each connected to the rear upper push ladder connecting ring and the rear lower push ladder connecting ring of the rear push ladder through a corresponding pin.

[0014] The aforementioned maintenance platform for the offshore photovoltaic platform includes wear-resistant and anti-slip plates made of nylon material at the bottom of both the front and rear sections of the push ladder.

[0015] Another technical solution to achieve the objective of this invention is: a method for using a maintenance platform for an offshore photovoltaic platform. Based on this invention, the method for using the maintenance platform includes the following steps:

[0016] S1. Use a tugboat to tow the maintenance platform into the work area. After arriving near the work area, use the two grouts on the maintenance platform to adjust its position. Position the maintenance platform between the photovoltaic support to be maintained and another photovoltaic support adjacent to the photovoltaic support behind the photovoltaic support to be maintained. Then, tie the mooring cables on the two mooring winches on one side of the maintenance platform to the two piles below the rear of the photovoltaic support to be maintained. Tie the mooring cables on the two mooring winches on the other side of the maintenance platform to the two piles below the front of another photovoltaic support. Then adjust the length of the mooring cables to make the maintenance platform stable and fixed.

[0017] S2. A pair of hydraulic lifting cylinders lift a corresponding push ladder support platform, so that the push ladder support platform is tilted with one end higher than the photovoltaic bracket to be repaired and the other end lower, and the height of the high end of the push ladder support platform is matched with the height of the last lower chord on the photovoltaic bracket to be repaired.

[0018] S3. Using manual labor or auxiliary lifting machinery, lift the front section of the push ladder on the inclined push ladder placement platform, and place the head of the front section of the push ladder on the last lower chord of the photovoltaic support to be inspected. Continue to push the front section of the push ladder diagonally upward until most of the front section of the push ladder enters the photovoltaic support to be inspected.

[0019] S4. First, move the rear section of the push ladder, which is located on the inclined push ladder platform, to the rear of the front section of the push ladder. Then, raise the front end of the rear section of the push ladder manually or with auxiliary equipment so that the upper and lower connecting rings at the front of the rear section of the push ladder are aligned with the upper and lower connecting rings at the rear of the front section of the push ladder. Then, use pins to connect and fix the upper and lower connecting rings. Then, continue to push the rear section of the push ladder diagonally upward until the entire push ladder reaches the predetermined position inside the photovoltaic bracket to be inspected.

[0020] S5. Temporarily stabilize the entire push ladder using manpower or machinery. Then, arrange 1 to 2 workers to enter the push ladder and use strapping to tie the entire push ladder to the photovoltaic support to be inspected at several designed binding nodes.

[0021] S6. After the entire push ladder is fixed, the workers can use the push ladder to reach the area under the photovoltaic panel to be repaired or other facilities to be repaired to carry out the repair work.

[0022] S7. After the maintenance work is completed, leave 1 to 2 workers on the push ladder, untie the binding straps, and after all the binding straps are untied, the workers retreat to the maintenance platform and use manpower or machinery to pull down the entire push ladder. After the rear push ladder is removed from the photovoltaic bracket, pull out the pins on the connecting rings of the upper and lower push ladders to separate the front and rear push ladders. Place the rear push ladder on the storage area of ​​the push ladder placement platform, then remove the front push ladder from the photovoltaic bracket, and then store the front push ladder. The work is then completed.

[0023] In the above-mentioned method of using the maintenance platform of the offshore photovoltaic platform, when performing step S5, the limiting block installed at the rear of the bottom surface of the rear push ladder is used to temporarily stabilize the entire push ladder by locking it onto the last lower chord of the photovoltaic support.

[0024] In the above-mentioned method for using the maintenance platform of the offshore photovoltaic platform, when performing step S5, the binding nodes are all located on the lower chord of the photovoltaic support.

[0025] The maintenance platform for offshore photovoltaic platforms and its method of use of the present invention have the following beneficial effects:

[0026] 1. A floating platform with a width adapted to the distance between the piles of two adjacent photovoltaic supports is adopted. Two ladder placement platforms are arranged on the floating platform, and a set of ladders is arranged on each of the two ladder placement platforms. By installing two pairs of hydraulic lifting cylinders on the working platform of the floating platform, the two ladder placement platforms can be lifted to an inclined plane consistent with the tilt direction of the photovoltaic support, which facilitates the pushing of the ladders located on the ladder placement platforms into the photovoltaic support, providing a safe working surface for the operation and maintenance of large-span offshore photovoltaic platforms.

[0027] 2. No large vessels are required, and a working surface can be quickly provided for maintenance personnel to carry out maintenance on the photovoltaic platform from below;

[0028] 3. By adjusting the position of the maintenance platform with four mooring winches, the push ladder can be placed on each truss of the photovoltaic support, which makes it convenient for workers to repair damaged photovoltaic panels or supporting electrical equipment on the photovoltaic platform.

[0029] 4. By adjusting the width and length of the push ladder, it can be universally applied to various offshore photovoltaic platforms. Attached Figure Description

[0030] Figure 1 This is a plan view of the maintenance platform of the offshore photovoltaic platform of the present invention;

[0031] Figure 2 This is a side view of the maintenance platform of the offshore photovoltaic platform of the present invention;

[0032] Figure 3 This is a plan view of the buoyancy platform in the maintenance platform of the offshore photovoltaic platform of the present invention;

[0033] Figure 4 This is a side view of the push ladder in the maintenance platform of the offshore photovoltaic platform of the present invention;

[0034] Figure 5 This is a structural diagram of step S1 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0035] Figure 6 This is a structural diagram of step S2 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0036] Figure 7 This is a structural diagram of step S3 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0037] Figure 8 This is a structural diagram of step S3 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0038] Figure 9 This is a structural diagram of step S4 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0039] Figure 10 This is a structural diagram of step S5 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention;

[0040] Figure 11 This is a structural diagram of step S6 of the method for using the maintenance platform of the offshore photovoltaic platform according to the present invention. Detailed Implementation

[0041] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0042] Please see Figures 1 to 4 The maintenance platform of the offshore photovoltaic platform of the present invention includes a floating platform and two sets of push ladders 4.

[0043] The floating platform comprises, from bottom to top, a buoyancy platform 1, a working platform 2, and two ladder-supporting platforms 3; wherein

[0044] The buoyancy platform 1 is made of steel pipe and includes a rectangular main buoyancy platform 10, an isosceles trapezoidal platform bow 11 connected to the front end of the main buoyancy platform 10, and two platform stern wings 12 connected to the rear ends of the main buoyancy platform 10 respectively; the width of the main buoyancy platform 10 is adapted to the distance between the piles of the two adjacent photovoltaic supports.

[0045] The working platform 2 is made of steel pipe and is rectangular in shape to fit the main buoyancy platform 10. It is fixed above the main buoyancy platform 10 by support columns 20. The working platform 2 is equipped with four mooring winches 21, two outriggers 22, two high-holding anchors 23, two pairs of hydraulic lifting cylinders 24, and a containerized generator 25. The four mooring winches 21 are evenly distributed at the four corners of the working platform 2. The two outriggers 22 are located at the rear end of the working platform 2, one on the left and one on the right. The two high-holding anchors 23 are respectively located at the middle of the front end and the middle of the rear end of the working platform 2 via anchor winches 230. The two pairs of hydraulic lifting cylinders 24 are installed at the middle-front and middle-rear of the working platform 2. The containerized generator 25 is located in the middle of the working platform 2.

[0046] Two push ladder support platforms 3 are installed on two sets of hydraulic jacking devices in a one-to-one correspondence, so that the length direction of the two push ladder support platforms 3 is perpendicular to the length direction of the working platform 2; the length of each push ladder support platform 3 is adapted to the width of the working platform 2.

[0047] Two sets of push ladders 4 are installed on two push ladder support platforms 3 in a one-to-one correspondence; each set of push ladders 4 includes at least a front push ladder 41 and a rear push ladder 42 connected end to end; the front push ladder 41 and the rear push ladder 42 of each set of push ladders 4 are arranged parallel to each other on a single push ladder support platform 3 with their length direction perpendicular to the length direction of the work platform 2.

[0048] The rear push ladder 42 includes a rear bottom layer 421, a rear walkway platform 422, and a rear railing 423. The rear bottom layer 421 includes two rear lower longitudinal main beams, several rear lower transverse main beams spanning between the two rear lower longitudinal main beams, and two rear lower push ladder connecting rings 424 that are connected one-to-one to the front ends of the two rear lower longitudinal main beams. The rear walkway platform 422 is connected above the rear bottom layer 421 by multiple vertical support rods and diagonal braces. The rear walkway platform 422 includes two rear upper longitudinal... The main beam, several rear upper transverse main beams spanning between two rear upper longitudinal main beams, and two rear upper push ladder connecting rings 425 that are connected one-to-one to the front ends of the two rear upper longitudinal main beams; the rear railing 423 is connected to both sides of the rear walkway platform 422, and the rear railing 423 includes multiple rear railing posts hinged to the rear upper longitudinal main beams of the rear walkway platform 422, multiple rear railing crossbars hinged between adjacent rear railing posts, and rear railing handrails hinged to the top of the rear railing posts;

[0049] The front push ladder 41 includes a front bottom layer 411, a front walkway platform 412, and a front railing 413. The front bottom layer 411 includes two front lower longitudinal main beams, several front lower transverse main beams spanning between the two front lower longitudinal main beams, and two rear lower push ladder connecting rings 414 that are connected one-to-one to the rear ends of the two front lower longitudinal main beams. The front parts of the two front lower longitudinal main beams are curved upwards. The front walkway platform 412 is connected above the front bottom layer 411 by multiple vertical support rods and diagonal braces. The front walkway platform 412 includes two front upper longitudinal main beams and several front upper transverse main beams spanning between the two front upper longitudinal main beams. The main beam and two corresponding front-upper push ladder connecting rings 415 are connected to the rear ends of the two front-upper longitudinal main beams; the distance between the front end of the front bottom layer 411 of the front push ladder 41 and the front end of the front walkway platform 412 is three-tenths of the distance between the rear end of the front bottom layer 411 and the rear end of the front walkway platform 412; the front railing 413 is connected to both sides of the front walkway platform 412, and the front railing 413 includes multiple front railing posts hinged to the front upper longitudinal main beam of the front walkway platform 412, multiple front railing crossbars hinged between adjacent front railing posts, and front railing handrails hinged to the top of the front railing posts.

[0050] The front upper push ladder connecting ring 415 and the front lower push ladder connecting ring 414 of the front push ladder 41 are connected to the rear upper push ladder connecting ring 425 and the rear lower push ladder connecting ring 424 of the rear push ladder 42 one by one through pins or bolts and nuts 400.

[0051] The bottom of the front push ladder 41 and the bottom of the rear push ladder 42 are each equipped with a wear-resistant and anti-slip plate 40 made of nylon.

[0052] Please see again Figures 5 to 11 The method of using the maintenance platform for offshore photovoltaic platforms according to the present invention includes the following steps:

[0053] S1. If the distance to the photovoltaic support to be inspected is close, use the two grouts 22 on the inspection platform 100 for movement. If the distance to the photovoltaic support to be inspected is far, use a tugboat to tow the inspection platform 100 to the point. After arriving near the work area, use the two grouts 22 on the inspection platform 100 to adjust its position. Position the inspection platform 100 between the photovoltaic support 500 to be inspected and another photovoltaic support 500' adjacent to the rear of the photovoltaic support 500 to be inspected. Then, tie the mooring cables 210 on the two mooring winches 21 on one side of the inspection platform 100 to the two piles 50 below the rear of the photovoltaic support 500 to be inspected. Tie the mooring cables 210 on the two mooring winches 21 on the other side of the inspection platform 100 to the two piles 50 below the front of the other photovoltaic support 500'. Then adjust the length of the mooring cables 210 to make the inspection platform 100 stable and fixed.

[0054] S2. By lifting a corresponding push ladder support platform 3 with two hydraulic lifting cylinders 24, the push ladder support platform 3 is tilted so that one end of the photovoltaic bracket 500 to be repaired is high and the other end is low, and the height of the high end of the push ladder support platform 3 is matched with the height of the last lower chord 51 on the photovoltaic bracket 500 to be repaired.

[0055] S3. Using manual labor or auxiliary lifting machinery, lift the front section of the push ladder 41 on the inclined push ladder placement platform 3, and place the head of the front section of the push ladder 41 on the last lower chord 51 of the photovoltaic bracket 500 to be inspected. Continue to push the front section of the push ladder 41 diagonally upward until most of the front section of the push ladder 41 enters the photovoltaic bracket 500 to be inspected. In order to prevent the front section of the push ladder 41 from sliding down on the lower chord of the photovoltaic bracket 500, a nylon wear-resistant anti-slip plate 40 is added to the bottom surface of the front section of the push ladder 41.

[0056] S4. First, move the rear push ladder 42, which is located on the inclined push ladder support platform 3, to the rear of the front push ladder 41. Then, manually or with auxiliary equipment, raise the front end of the rear push ladder 42 so that the upper and lower connecting rings at the front of the rear push ladder 42 are aligned with the upper and lower connecting rings at the rear of the front push ladder 41. Then, use pins to connect and fix the upper and lower connecting rings. Then, continue to push the rear push ladder 42 diagonally upward until the entire push ladder reaches the predetermined position inside the photovoltaic bracket 500 to be inspected. In order to prevent the rear push ladder 42 from sliding down on the lower chord of the photovoltaic bracket 500, a nylon wear-resistant anti-slip plate 40 is added to the bottom surface of the rear push ladder 42.

[0057] S5. The entire push ladder can be temporarily stabilized by manpower or machinery. This can be achieved by using a limiting block 40A installed at the rear of the bottom surface of the rear push ladder 42, which is then secured to the last lower chord 51 of the photovoltaic support 500. Then, one or two workers can enter the push ladder and use binding straps 6 to bind the entire push ladder to the photovoltaic support 500 to be inspected at several pre-designed binding nodes. All binding nodes are located on the lower chord 51 of the photovoltaic support 500.

[0058] S6. After the entire push ladder is fixed, the workers can use the push ladder to reach the area under the photovoltaic panel to be repaired or other facilities to be repaired, such as inverters and other photovoltaic equipment, to carry out maintenance work.

[0059] S7. After the maintenance work is completed, leave 1 to 2 workers on the push ladder, untie the binding straps 6, and after all the binding straps 6 are untied, the workers return to the maintenance platform 100 and use manpower or machinery to pull down the entire push ladder. After the rear push ladder 42 is moved out of the photovoltaic bracket 500, pull out the pins on the connecting rings of the upper and lower push ladders to separate the front push ladder 41 and the rear push ladder 42. Place the rear push ladder 42 in the storage area on the push ladder placement platform 3, then move the front push ladder 41 out of the photovoltaic bracket 500, and then store the front push ladder 41. The work is then completed.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A maintenance platform for an offshore photovoltaic platform, comprising a floating platform and two sets of push ladders, characterized in that, The floating platform includes, from bottom to top, a buoyancy platform, a working platform, and two ladder support platforms; The buoyancy platform is made of steel pipe and includes a rectangular main buoyancy platform, an isosceles trapezoidal platform bow connected to the front end of the main buoyancy platform, and two platform stern wings connected to the rear ends of the main buoyancy platform respectively; the width of the main buoyancy platform is adapted to the distance between the piles of the two adjacent photovoltaic supports. The working platform is made of steel pipe and is rectangular in shape to fit the main buoyancy platform. It is fixed above the main buoyancy platform by support columns. The working platform is equipped with four mooring winches, two outboard propellers, two high-holding anchors, and two pairs of hydraulic lifting cylinders. The four mooring winches are evenly distributed at the four corners of the working platform. The two outboard propellers are located at the rear end of the working platform, one on the left and one on the right. The two high-holding anchors are respectively located at the middle of the front end and the middle of the rear end of the working platform through anchor winches. The two pairs of hydraulic lifting cylinders are installed at the middle-front and middle-rear of the working platform. Two push ladder support platforms are installed on two pairs of hydraulic lifting cylinders in a one-to-one correspondence, so that the length direction of the two push ladder support platforms is perpendicular to the length direction of the working platform; the length of each push ladder support platform is adapted to the width of the working platform. Two sets of push ladders are installed one-to-one on two push ladder support platforms; Each set of push ladders includes at least a front push ladder and a rear push ladder connected end to end; the front push ladder and the rear push ladder of each set of push ladders are arranged parallel to each other on a single push ladder support platform with their length direction perpendicular to the length direction of the work platform.

2. The maintenance platform for the offshore photovoltaic platform according to claim 1, characterized in that, The rear push ladder includes a rear bottom layer, a rear walkway platform, and a rear railing; the rear bottom layer includes two rear lower longitudinal main beams, several rear lower transverse main beams spanning between the two rear lower longitudinal main beams, and two rear lower push ladder connecting rings that are connected one-to-one to the front ends of the two rear lower longitudinal main beams. The rear walkway platform is connected to the upper part of the rear bottom layer by multiple vertical support rods and diagonal braces. The rear walkway platform includes two rear upper longitudinal main beams, several rear upper transverse main beams spanning between the two rear upper longitudinal main beams, and two rear upper push ladder connecting rings that are connected one-to-one to the front ends of the two rear upper longitudinal main beams. The rear railing is connected to both sides of the rear walkway platform. The rear railing includes multiple rear railing posts hinged to the rear upper longitudinal main beams of the rear walkway platform, multiple rear railing crossbars hinged between adjacent rear railing posts, and rear railing handrails hinged to the top of the rear railing posts. The front push ladder includes a front base level, a front walkway platform, and a front railing. The front base level includes two front lower longitudinal main beams, several front lower transverse main beams spanning between the two front lower longitudinal main beams, and two corresponding rear push ladder connecting rings connected to the rear ends of the two front lower longitudinal main beams. The front parts of the two front lower longitudinal main beams are curved upwards. The front walkway platform is connected above the front base level by multiple vertical support rods and diagonal braces. The front walkway platform includes two front upper longitudinal main beams, several front upper longitudinal main beams spanning between the two front upper longitudinal main beams, and a front lower push ladder connecting rings. The upper transverse main beam and two corresponding upper push ladder connecting rings are connected to the rear ends of the two upper longitudinal main beams; the distance between the front end of the front bottom layer of the front push ladder and the front end of the front walkway platform is three-tenths of the distance between the rear end of the front bottom layer and the rear end of the front walkway platform; the front railing is connected to both sides of the front walkway platform, and the front railing includes multiple front railing posts hinged to the front longitudinal main beam of the front walkway platform, multiple front railing crossbars hinged between adjacent front railing posts, and front railing handrails hinged to the top of the front railing posts. The front upper push ladder connecting ring and the front lower push ladder connecting ring of the front push ladder are each connected to the rear upper push ladder connecting ring and the rear lower push ladder connecting ring of the rear push ladder through a corresponding pin.

3. The maintenance platform for an offshore photovoltaic platform according to claim 1 or 2, characterized in that, The bottom of the front push ladder and the bottom of the rear push ladder are each equipped with a wear-resistant and anti-slip plate made of nylon.

4. A method for using a maintenance platform for an offshore photovoltaic platform, based on the maintenance platform for an offshore photovoltaic platform as described in claim 1, characterized in that, The method of using the maintenance platform includes the following steps: S1. Use a tugboat to tow the maintenance platform into the work area. After arriving near the work area, use the two grouts on the maintenance platform to adjust its position. Position the maintenance platform between the photovoltaic support to be maintained and another photovoltaic support adjacent to the photovoltaic support behind the photovoltaic support to be maintained. Then, tie the mooring cables on the two mooring winches on one side of the maintenance platform to the two piles below the rear of the photovoltaic support to be maintained. Tie the mooring cables on the two mooring winches on the other side of the maintenance platform to the two piles below the front of another photovoltaic support. Then adjust the length of the mooring cables to make the maintenance platform stable and fixed. S2. A pair of hydraulic lifting cylinders lift a corresponding push ladder support platform, so that the push ladder support platform is tilted with one end higher than the photovoltaic bracket to be repaired and the other end lower, and the height of the high end of the push ladder support platform is matched with the height of the last lower chord on the photovoltaic bracket to be repaired. S3. Using manual labor or auxiliary lifting machinery, lift the front section of the push ladder on the inclined push ladder placement platform, and place the head of the front section of the push ladder on the last lower chord of the photovoltaic support to be inspected. Continue to push the front section of the push ladder diagonally upward until most of the front section of the push ladder enters the photovoltaic support to be inspected. S4. First, move the rear section of the push ladder, which is located on the inclined push ladder platform, to the rear of the front section of the push ladder. Then, raise the front end of the rear section of the push ladder manually or with auxiliary equipment so that the upper and lower connecting rings at the front of the rear section of the push ladder are aligned with the upper and lower connecting rings at the rear of the front section of the push ladder. Then, use pins to connect and fix the upper and lower connecting rings. Then, continue to push the rear section of the push ladder diagonally upward until the entire push ladder reaches the predetermined position inside the photovoltaic bracket to be inspected. S5. Temporarily stabilize the entire push ladder using manpower or machinery. Then, arrange 1 to 2 workers to enter the push ladder and use strapping to tie the entire push ladder to the photovoltaic support to be inspected at several designed binding nodes. S6. After the entire push ladder is fixed, the workers can use the push ladder to reach the area under the photovoltaic panel to be repaired or other facilities to be repaired to carry out the repair work. S7. After the maintenance work is completed, leave 1 to 2 workers on the push ladder, untie the binding straps, and after all the binding straps are untied, the workers retreat to the maintenance platform and use manpower or machinery to pull down the entire push ladder. After the rear push ladder is removed from the photovoltaic bracket, pull out the pins on the connecting rings of the upper and lower push ladders to separate the front and rear push ladders. Place the rear push ladder on the storage area of ​​the push ladder placement platform, then remove the front push ladder from the photovoltaic bracket, and then store the front push ladder. The work is then completed.

5. The method of using the maintenance platform of the offshore photovoltaic platform according to claim 4, characterized in that, When performing step S5, the entire push ladder is temporarily stabilized by using a limiting block installed at the rear of the bottom surface of the rear push ladder and locking it onto the last lower chord of the photovoltaic support.

6. The method of using the maintenance platform of the offshore photovoltaic platform according to claim 4, characterized in that, When performing step S5, all the binding nodes are located on the lower chord of the photovoltaic support.

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