Double-floating-pipe truss floating body structure suitable for offshore floating type photovoltaic platform

Abstract

The invention discloses a double-floating-pipe truss floating body structure suitable for an offshore floating type photovoltaic platform, and relates to the technical field of offshore photovoltaic power generation, the double-floating-pipe truss floating body structure comprises two double-floating-pipe truss assemblies, each double-floating-pipe truss assembly comprises two bottom round steel pipes, a plurality of vertical face inclined web round steel pipes are fixed to the outer surfaces of the two bottom round steel pipes, and the vertical face inclined web round steel pipes are fixed to the outer surfaces of the two bottom round steel pipes. Every two adjacent facade inclined web round steel pipes form a group, and facade straight web round steel pipes are fixedly welded between the outer surfaces of the facade inclined web round steel pipes in each group; according to the double-floating-pipe truss floating body structure suitable for the offshore floating type photovoltaic platform, the steel consumption is reduced, and meanwhile, the peripheral floating pipes have enough thickness to cope with the impact of offshore floating ice on the whole floating type photovoltaic platform in winter; therefore, the effect of protecting the internal floating body structure is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of offshore photovoltaic power generation, in particular to a double-float-pipe truss floating body structure suitable for an offshore floating photovoltaic platform. BACKGROUND

[0002] Generally, a large land photovoltaic project needs to occupy more land area and land resources, and offshore photovoltaic power generation is a new energy utilization mode and resource development mode, has the characteristics of high power generation, less land occupation, easy combination with other industries, and the like, and marine photovoltaic has natural environmental advantages, the water surface is open and has no shelter, the sunshine is long and the water surface reflection light is fully utilized, and the power generation can be significantly improved, offshore photovoltaic power stations are divided into two categories of pile foundation fixed type and floating type, the history of floating photovoltaic power generation can be traced back to a century ago, an American warship Jacona participating in the First World War was refitted into a water power plant by the United Kingdom in the 1930s, marking the birth of the first water power generation technology and opening up the steel structure as a floating photovoltaic structure support, the first FPV project in the world is located in Aichi County, Japan, with a capacity of 20kW, and is researched and built by the Japan Institute of Industry and Technology AIST in 2007, and since then, floating photovoltaic power generation has been researched at home and abroad.

[0003] The existing offshore photovoltaic technology overcomes the technical difficulties, fully utilizes the offshore light energy, greatly improves the power generation structure proportion of China, promotes the development of clean energy, and marches towards the double-carbon target, and the research and development of the offshore floating photovoltaic structure will have a profound effect on the development of China's marine new energy, and has important significance for the progress of China's marine industry, is an important support for China's transition from a marine power to a marine power, and at present, many offshore photovoltaic platforms will be deformed to a large extent in the face of complex offshore environment, and even be broken, so that the whole floating photovoltaic power station is damaged, in addition, a large amount of floating ice appears on the sea surface in the winter ice period, and the photovoltaic platform is impacted by the surge of seawater, so that the structure is damaged.

[0004] Therefore, the double-float-pipe truss floating body structure suitable for the offshore floating photovoltaic platform is proposed to solve the problems in the above background. SUMMARY

[0005] The purpose of the application is to provide a double-float-pipe truss floating body structure suitable for an offshore floating photovoltaic platform to solve the problem that the offshore double-float-pipe truss floating body structure is easily damaged by offshore floating objects.

[0006] To achieve the above object, the application provides the following technical scheme: a double floating pipe truss floating body structure suitable for offshore floating photovoltaic platform, comprising two double floating pipe truss assemblies, each of the double floating pipe truss assemblies comprises two bottom circular steel pipes, the outer surfaces of the two bottom circular steel pipes are fixed with a plurality of vertical inclined web circular steel pipes, every two adjacent vertical inclined web circular steel pipes form a group, the outer surfaces of the vertical inclined web circular steel pipes in each group are fixed with a vertical straight web circular steel pipe, one end of the vertical inclined web circular steel pipes is fixed with a top circular steel pipe, the outer surfaces of the two bottom circular steel pipes are fixed with a plurality of bottom straight web circular steel pipes, every two adjacent bottom straight web circular steel pipes form a group, and the outer surfaces of the bottom straight web circular steel pipes in each group are fixed with a bottom inclined web circular steel pipe; the bottom is two steel cylinders with the same thickness, which can provide sufficient buoyancy reserve for the whole floating body structure, the double floating pipe truss floating body structure can provide sufficient buoyancy support for the box transformer structure of the offshore floating photovoltaic power station, and the offshore floating photovoltaic power station is ensured to be far away from the water surface.

[0007] Preferably, the outer surfaces of the plurality of secondary steel pipe trusses are fixed with a middle steel pipe truss, and the outer surfaces of the two bottom support circular steel pipes are fixed with two bottom support circular steel pipes.

[0008] Preferably, the plurality of vertical straight web circular steel pipes are divided into two groups, one end of the vertical straight web circular steel pipes in each group is fixedly connected with the outer surfaces of two top circular steel pipes, and the plurality of vertical straight web circular steel pipes are divided into four groups, one end of the vertical straight web circular steel pipes in each group is fixedly connected with the outer surfaces of four bottom circular steel pipes; the double floating pipe truss floating body structure has strong tensile and compressive bearing capacity, the strength of the double floating pipe truss floating body structure is large enough to be connected with an anchoring foundation, so that the stable operation of the whole offshore floating photovoltaic platform is ensured.

[0009] Preferably, the plurality of bottom inclined web circular steel pipes are grouped on the same side, every adjacent side of the four bottom circular steel pipes is a group, and the two ends of the bottom inclined web circular steel pipes in each group are fixedly connected with the outer surfaces of two bottom circular steel pipes.

[0010] Preferably, a protection assembly is arranged between the outer surfaces of the two inner bottom circular steel pipes, the protection assembly comprises a plurality of connecting heads, and one end of the connecting heads is fixedly welded with the outer surfaces of the two inner bottom circular steel pipes.

[0011] Preferably, the plurality of connecting heads are divided into groups of two opposite connecting heads, the outer surface of each group of connecting heads is fixedly welded with a round steel pipe frame, the outer surfaces of the plurality of round steel pipe frames are fixed with parallel round steel pipes, and the top portions of the plurality of parallel round steel pipes are fixed with mounting plates; the double-float-pipe truss floating body structure of the offshore floating photovoltaic platform saves the amount of steel while the peripheral float pipe has sufficient thickness to cope with the impact of winter sea ice on the entire floating photovoltaic platform, thereby playing a role in protecting the internal floating body structure.

[0012] Preferably, the top portion of the mounting plate is provided with an inclination sensor near the front surface for detecting the stability of the double-float-pipe truss floating body structure, a counterweight is fixed to the top portion of the mounting plate near one side edge for keeping the mounting plate balanced, and a support column is fixedly welded to the top portion of the mounting plate near the center.

[0013] Preferably, the top end of the support column is fixed with a tray, the inner wall of the tray is provided with a hollow rubber sleeve, a hydrogen tank is fixed to the top portion of the mounting plate near the other side edge through screws, and a bidirectional air pump is arranged on the top portion of the mounting plate; in order to enable the offshore floating photovoltaic system to withstand continuous strong sea waves without being damaged, when the double-float-pipe truss floating body structure is subjected to a violent collision, the hollow rubber sleeve is filled with hydrogen gas, the entire double-float-pipe truss floating body structure is driven to move upward and away from the sea surface, and the offshore floating photovoltaic system is driven to return to the sea surface, thereby reducing the impact of sea ice on the photovoltaic system, and the protection assembly further reduces the probability of damage to the double-float-pipe truss floating body structure caused by the impact of sea ice and other floating objects.

[0014] Preferably, one end of the bidirectional air pump is fixedly connected with a communication pipe, one end of the communication pipe penetrates into the hydrogen tank, the other end of the bidirectional air pump is fixedly connected with a delivery pipe, and one end of the delivery pipe penetrates through the outside of the support column to the inside of the hollow rubber sleeve.

[0015] Preferably, the outer surface of the support column is provided with a pressure sensor, the outer surface of the hydrogen tank is provided with a safety valve for preventing hydrogen explosion, and the outer surface of the hydrogen tank is sleeved with a constant-temperature sleeve for heat preservation of hydrogen; since hydrogen is flammable and explosive when it encounters high temperature, in order to ensure that the hydrogen tank floating in the sea is not affected by the harsh weather on the sea, when the gas pressure in the hydrogen tank is too high, part of the gas is released through the safety valve to reduce the internal pressure, and the constant-temperature sleeve plays a heat preservation role for hydrogen, which can effectively protect the double-float-pipe truss floating body structure.

[0016] Compared with the prior art, the present application has the following advantages: 1. In the application, the bottom of the double floating pipe truss floating body structure of the offshore floating photovoltaic platform is two steel cylinders with the same thickness, which can provide sufficient buoyancy reserve for the entire floating body structure. Since the weight of the box transformer structure of the offshore floating photovoltaic power station is relatively large, the double floating pipe truss floating body structure can provide sufficient buoyancy support for it, ensuring that the box transformer of the offshore floating photovoltaic power station is far away from the water surface.

[0017] 2. In the application, the double floating pipe truss floating body structure has strong tensile and compressive bearing capacity, and the double floating pipe truss floating body structure is strong enough to be connected with the anchoring foundation, thereby ensuring the stable operation of the entire offshore floating photovoltaic platform.

[0018] 3. In the application, the double floating pipe truss floating body structure of the offshore floating photovoltaic platform saves the amount of steel while the peripheral floating pipe has sufficient thickness to cope with the impact of winter sea ice on the entire floating photovoltaic platform, thereby playing a protective role for the internal floating body structure.

[0019] 4. In the application, in order to make the offshore floating photovoltaic system not be damaged by the continuous strong sea, when the double floating pipe truss floating body structure collides violently, hydrogen gas is filled into the hollow rubber sleeve to drive the entire double floating pipe truss floating body structure to move upward and away from the sea surface, thereby bringing the offshore floating photovoltaic system back to the sea surface, reducing the impact of floating ice in the ocean on the photovoltaic system, and further reducing the probability of damage to the double floating pipe truss floating body structure caused by the impact of floating ice and other floating objects in the ocean through the action of the protection assembly.

[0020] 5. In the application, since hydrogen gas is flammable and explosive when it encounters high temperature, in order to ensure that the hydrogen tank floating in the ocean is not affected by the bad weather on the ocean, when the gas pressure in the hydrogen tank is too high, part of the gas is released through the safety valve to reduce the internal pressure, and the constant temperature sleeve plays a heat preservation role for hydrogen gas, which can effectively protect the double floating pipe truss floating body structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of the double floating pipe truss floating body structure suitable for the offshore floating photovoltaic platform of the application; Figure 2 It is a sectional view of the secondary steel pipe truss part of the double floating pipe truss floating body structure suitable for the offshore floating photovoltaic platform of the application; Figure 3 It is a sectional view of the secondary steel pipe truss part of the double floating pipe truss floating body structure suitable for the offshore floating photovoltaic platform of the application; Figure 4 It is a sectional view of the double floating pipe truss assembly part of the double floating pipe truss floating body structure suitable for the offshore floating photovoltaic platform of the application; Figure 5Figure 1 is a perspective view of a bottom round steel pipe part of a double floating pipe truss floating body structure suitable for a floating photovoltaic platform at sea according to the present application; Figure 6 Figure 4 is a perspective view of a protection assembly part of a double floating pipe truss floating body structure suitable for a floating photovoltaic platform at sea according to the present application; Figure 7 Figure 5 is a perspective view of a hollow rubber sleeve part of a double floating pipe truss floating body structure suitable for a floating photovoltaic platform at sea according to the present application; Figure 8 Figure 6 is a sectional perspective view of a support column part of a double floating pipe truss floating body structure suitable for a floating photovoltaic platform at sea according to the present application.

[0022] In the figure: 1, double floating pipe truss assembly; 101, bottom round steel pipe; 102, top round steel pipe; 103, vertical inclined web round steel pipe; 104, vertical straight web round steel pipe; 105, bottom straight web round steel pipe; 106, bottom inclined web round steel pipe; 2, secondary steel pipe truss; 3, middle steel pipe truss; 4, protection assembly; 401, connecting head; 402, round steel pipe frame; 403, parallel round steel pipe; 404, inclination sensor; 405, mounting plate; 406, counterweight; 407, support column; 408, tray; 409, hollow rubber sleeve; 410, hydrogen tank; 411, two-way air pump; 412, communication pipe; 413, delivery pipe; 414, pressure sensor; 415, safety valve; 416, constant temperature sleeve; 5, bottom support round steel pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] Please refer to Figures 1-8The application provides a technical scheme: a double-float-pipe truss floating body structure suitable for a marine floating photovoltaic platform, comprising two double-float-pipe truss assemblies 1, characterized in that the double-float-pipe truss assembly 1 comprises two bottom circular steel pipes 101, the outer surfaces of the two bottom circular steel pipes 101 are fixed with a plurality of vertical inclined web circular steel pipes 103, every two adjacent vertical inclined web circular steel pipes 103 form a group, the outer surfaces of the vertical inclined web circular steel pipes 103 in each group are fixed and welded with a vertical straight web circular steel pipe 104, one end of the plurality of vertical inclined web circular steel pipes 103 is fixed and welded with a top circular steel pipe 102, the outer surfaces of the two bottom circular steel pipes 101 are fixed and welded with a plurality of bottom straight web circular steel pipes 105, every two adjacent bottom straight web circular steel pipes 105 form a group, the outer surfaces of the bottom straight web circular steel pipes 105 in each group are fixed and welded with a bottom inclined web circular steel pipe 106, both ends of the plurality of bottom circular steel pipes 101 are fixed and welded with a secondary steel pipe truss 2, the outer surfaces of the plurality of secondary steel pipe trusses 2 are fixed and welded with a middle steel pipe truss 3, the outer surfaces of the two bottom circular steel pipes 101 on the inner side are fixed and welded with two bottom support circular steel pipes 5, the plurality of vertical straight web circular steel pipes 104 are divided into two groups, one end of the vertical straight web circular steel pipes 104 in each group is fixedly connected with the outer surfaces of the two top circular steel pipes 102, the plurality of vertical straight web circular steel pipes 104 are divided into four groups, one end of the vertical straight web circular steel pipes 104 in each group is fixedly connected with the outer surfaces of the four bottom circular steel pipes 101, the plurality of bottom inclined web circular steel pipes 106 are grouped on the same side, one side of the four bottom circular steel pipes 101 is a group, and the two ends of the bottom inclined web circular steel pipes 106 in each group are fixedly connected with the outer surfaces of the two bottom circular steel pipes 101, and the outer surfaces of the two bottom support circular steel pipes 5 are fixedly connected with the bottom of the middle steel pipe truss 3.

[0025] In the embodiment, in order to ensure the stability of the double-float-pipe truss floating body structure of the marine floating photovoltaic platform, as shown in the figure, Figure 1 The double-float-pipe truss floating body structure is composed of the double-float-pipe truss assembly 1, the secondary steel pipe truss 2, the middle steel pipe truss 3 and the bottom support circular steel pipe 5, and the double-float-pipe truss assembly 1 is partially shown in the figure, Figures 4-5As shown, the entire floating platform is provided with buoyancy by using a bottom round steel pipe 101 with a diameter of 800 mm, and is welded with a top round steel pipe 102 with a diameter of 190 mm through a vertical surface inclined web round steel pipe 103 with a diameter of 152 mm, a vertical surface straight web round steel pipe 104 with a diameter of 122 mm, a bottom surface straight web round steel pipe 105 with a diameter of 213 mm, and a bottom surface inclined web round steel pipe 106 with a diameter of 122 mm, thereby forming a double floating pipe truss structure, which has sufficient buoyancy reserve to fully prepare the box transformer structure of the offshore floating photovoltaic power station carried on the structure, has strong rigidity, and has good anti-impact performance when facing the impact of offshore floating ice. The secondary steel pipe truss 2 uses the top round steel pipe 102 as the outer steel pipe of the truss, and is welded through the vertical surface straight web round steel pipe 104 and the bottom surface inclined web round steel pipe 106, thereby forming the secondary steel pipe truss 2 structure, which has the function of connecting the double floating pipe trusses. In the process of splicing the floating pipe truss floating body structure, the two secondary steel pipe trusses 2 are welded on the two double floating pipe truss assemblies 1 structures. The middle steel pipe truss 3 also uses the top round steel pipe 102 as the outer steel pipe of the truss, and is welded through the vertical surface straight web round steel pipe 104 and the bottom surface inclined web round steel pipe 106, thereby forming the middle steel pipe truss 3, which plays a role in reinforcing the structure and enhancing the tensile and compressive strength between the two secondary steel pipe truss 2 structures. In the welding process, the middle steel pipe truss 3 is welded on the secondary steel pipe truss structure 2. The bottom support round steel pipe 5 is a round steel pipe with a diameter of 122 mm, which plays a role in diagonal support for the double floating pipe truss floating body structure of the entire offshore floating photovoltaic platform in complex offshore working conditions, prevents the diagonal truss from generating large tensile and compressive forces and thus causing deformation of the entire structure, thereby causing failure of the structure. In the welding process, the bottom support round steel pipe 5 is welded between the outer surfaces of the two double floating pipe truss assemblies 1. Through the stable construction of the double floating pipe truss floating body structure, sufficient buoyancy reserve is provided for the entire floating body structure. At the same time, the peripheral floating pipe has sufficient thickness to cope with the impact of winter offshore floating ice on the entire floating photovoltaic platform, thereby playing a role in protecting the internal floating body structure and thus ensuring the stable operation of the offshore photovoltaic system, solving the problem of easy structural damage of the offshore double floating pipe truss floating body structure caused by the impact of offshore floating objects in the prior art.

[0026] As Figures 1-8As shown, the outer surface between the two inner bottom circular steel pipes 101 is provided with a protection assembly 4, the protection assembly 4 comprises a plurality of connecting heads 401, one end of the plurality of connecting heads 401 is respectively fixedly welded with the outer surface of the two inner bottom circular steel pipes 101, every opposite two of the plurality of connecting heads 401 is a group, the outer surface of each group of connecting heads 401 is fixedly welded with a circular steel pipe frame 402, the outer surface between the plurality of circular steel pipe frames 402 is fixedly provided with a parallel circular steel pipe 403, the top between the plurality of parallel circular steel pipes 403 is fixedly provided with a mounting plate 405, the top of the mounting plate 405 near the front surface is provided with an inclination sensor 404 for detecting the stability of the double floating pipe truss floating body structure, the top of the mounting plate 405 near the side edge is fixedly provided with a counterweight 406 for keeping the mounting plate 405 balanced, the top of the mounting plate 405 near the center is fixedly welded with a support column 407, the top end of the support column 407 is fixedly provided with a tray 408, the inner wall of the tray 408 is provided with a hollow rubber sleeve 409, the top of the mounting plate 405 near the other side edge is fixedly provided with a hydrogen tank 410 through screws, the top of the mounting plate 405 is provided with a bidirectional air pump 411, one end of the bidirectional air pump 411 is fixedly communicated with a communication pipe 412, one end of the communication pipe 412 penetrates into the inside of the hydrogen tank 410, the other end of the bidirectional air pump 411 is fixedly communicated with a delivery pipe 413, one end of the delivery pipe 413 penetrates through the outside of the support column 407 to the inside of the hollow rubber sleeve 409, the outer surface of the support column 407 is provided with a pressure sensor 414, the outer surface of the hydrogen tank 410 is provided with a safety valve 415 for preventing hydrogen explosion, the outer surface of the hydrogen tank 410 is sleeved with a constant temperature sleeve 416 for heat preservation of hydrogen.

[0027] In this embodiment, in order to make the offshore floating photovoltaic system face the sea continuously strong and not be damaged, first start the tilt sensor 404, wherein the tilt sensor 404 detects the inclination angle of the double floating pipe truss floating body structure relative to the sea surface to judge the attitude change, when the double floating pipe truss floating body structure collides violently, it will cause the inclination angle to change sharply, the sensor element in the sensor will respond to the change of the inclination, and then output the electric signal, the tilt sensor 404 integrates the acceleration measurement element to detect the acceleration of the object, when the double floating pipe truss floating body structure is subjected to collision, the accelerometer will record the sharp acceleration change, by monitoring the amplitude and change rate of acceleration, the strength and direction of collision are judged, if the acceleration exceeds the preset threshold, it is considered that the double floating pipe truss floating body structure has collided violently, when the tilt sensor 404 detects that the double floating pipe truss floating body structure is strongly impacted due to the influence of external environment, in order to protect the offshore photovoltaic system, the tilt sensor 404 transmits the detected signal to the external control system, and starts the double-way air pump 411 through the control system, wherein the double-way air pump 411 can effectively transfer gas in two directions.By changing the direction of the piston, the suction and discharge of the gas can be conveniently controlled. The design of the pump makes it particularly suitable for occasions where repeated gas delivery is required, such as gas circulation systems, gas preparation, and certain industrial applications. The bidirectional air pump 411 drives the communication pipe 412 to extract hydrogen from the inside of the hydrogen tank 410, so that the hydrogen enters the inside of the delivery pipe 413 through the communication pipe 412, and finally enters the inside of the hollow rubber sleeve 409. The hollow rubber sleeve 409 is made of silicone rubber, which has excellent elasticity, excellent high and low temperature resistance, and good resistance to ultraviolet and ozone. It can adapt to the harsh environment at sea. When the hydrogen enters the inside of the hollow rubber sleeve 409, the hollow rubber sleeve 409 expands and becomes larger. Since the density of hydrogen is less than that of air, when the hollow rubber sleeve 409 is filled with a large amount of hydrogen, according to Archimedes' principle, any object in a fluid will experience an upward buoyant force equal to the weight of the displaced fluid. After the hollow rubber sleeve 409 is filled with hydrogen, the weight of the air displaced by the entire device in the air will be greater than the weight of the hydrogen. Therefore, the buoyancy makes the hollow rubber sleeve 409 rise upward, thereby driving the entire double-float pipe truss floating body structure to move upward and away from the sea surface. When the pressure sensor 414 detects that the air pressure inside the hollow rubber sleeve 409 reaches a certain value, the bidirectional air pump 411 can be turned off. The pressure sensor 414 has an elastic element with a strain gauge inside. When the gas pressure acts on the element, its shape will change slightly, causing the resistance of the strain gauge to change. By measuring the change in resistance, the change in gas pressure can be determined. By using hydrogen to drive the double-float pipe truss floating body structure to move, the continuous impact of ice blocks and other objects on the sea surface on the floating photovoltaic system is prevented, thereby reducing the damage of objects in the ocean to the floating photovoltaic system. When it is necessary to place the floating photovoltaic system back on the sea surface, the bidirectional air pump 411 is started again to drive the delivery pipe 413 to extract gas from the inside of the hollow rubber sleeve 409, thereby causing the hydrogen to flow back to the inside of the hydrogen tank 410 through the communication pipe 412. When the hydrogen in the hollow rubber sleeve 409 is completely extracted back into the hydrogen tank 410, the hollow rubber sleeve 409 no longer has buoyancy and will be driven by its own gravity to bring the entire double-float pipe truss floating body structure back to the sea surface, thereby bringing the floating photovoltaic system back to the sea surface. Through the action of the protection assembly 4, the probability of damage to the double-float pipe truss floating body structure caused by the impact of floating ice and other floating objects in the ocean is further reduced.

[0028] As shown in Figure 1 and Figures 6-8 , the outer surface of the support column 407 is provided with a pressure sensor 414, and the outer surface of the hydrogen tank 410 is provided with a safety valve 415 for preventing hydrogen explosion, and the outer surface of the hydrogen tank 410 is sleeved with a constant temperature sleeve 416 for heat preservation of hydrogen.

[0029] In this embodiment, since hydrogen has the characteristics of flammability and explosiveness when it encounters high temperature, in order to ensure that the hydrogen tank 410 floating in the ocean will not be affected by the bad weather on the ocean, when the gas pressure in the hydrogen tank 410 is too high, the safety valve 415 is set to further ensure the stability of the hydrogen tank 410, wherein the safety valve 415 is an automatic valve set above the safe working pressure of the hydrogen tank 410, when the pressure in the tank reaches the preset limit, the safety valve 415 will automatically open to release part of the gas to reduce the internal pressure, thereby preventing the tank from exploding due to overpressure, the setting of the constant temperature sleeve 416 plays a role in keeping the hydrogen in the hydrogen tank 410 warm, effectively preventing the hydrogen in the hydrogen tank 410 from being affected by the external temperature and changing greatly, wherein the constant temperature sleeve 416 is made of vacuum insulation board, the vacuum insulation board realizes high heat insulation effect by generating a vacuum between two polystyrene foams, which is very suitable for the demand of high-efficiency heat preservation, thereby ensuring the stability of the gas in the hydrogen tank 410, which can effectively protect the double floating pipe truss floating body structure.

[0030] The use method and working principle of the device: in order to ensure the stability of the double floating pipe truss structure of the offshore floating photovoltaic platform, the bottom round steel pipe 101 with a diameter of 800mm is used to provide buoyancy for the whole floating platform, and the top round steel pipe 102 with a diameter of 190mm is welded with the vertical inclined round steel pipe 103 with a diameter of 152mm, the vertical straight round steel pipe 104 with a diameter of 122mm, the bottom straight round steel pipe 105 with a diameter of 213mm and the bottom inclined round steel pipe 106 with a diameter of 122mm, so as to form the double floating pipe truss structure, the secondary steel pipe truss 2 uses the top round steel pipe 102 as the outer steel pipe of the truss, which is welded with the vertical straight round steel pipe 104 and the bottom inclined round steel pipe 106, so as to form the secondary steel pipe truss 2 structure, which has the function of connecting the double floating pipe truss, and in the process of splicing the floating pipe truss structure, the two secondary steel pipe trusses 2 are welded on the two double floating pipe truss assemblies 1 structure, and the middle steel pipe truss 3 also uses the top round steel pipe 102 as the outer steel pipe of the truss, which is welded with the vertical straight round steel pipe 104 and the bottom inclined round steel pipe 106, so as to form the middle steel pipe truss 3, and in the process of welding, the middle steel pipe truss 3 is welded on the secondary steel pipe truss structure 2, and the bottom supporting round steel pipe 5 is a round steel pipe with a diameter of 122mm, which is welded between the outer surfaces of the two double floating pipe truss assemblies 1 in the process of welding, so as to provide sufficient buoyancy reserve for the whole floating structure through the stable construction of the double floating pipe truss structure, and at the same time, the peripheral floating pipe has sufficient thickness to cope with the impact of winter sea ice on the whole floating photovoltaic platform. In order to make the offshore floating photovoltaic system face the sea and not be damaged, when the inclination sensor 404 detects that the double floating pipe truss structure is strongly impacted due to the influence of external environment, in order to protect the offshore photovoltaic system, the inclination sensor 404 transmits the detected signal to the external control system, and starts the bidirectional air pump 411 through the control system, drives the communication pipe 412 to extract hydrogen from the inside of the hydrogen tank 410, so that the hydrogen enters the inside of the delivery pipe 413 through the communication pipe 412, and finally enters the inside of the hollow rubber sleeve 409, wherein the hollow rubber sleeve 409 is made of silicone rubber material, which has excellent elasticity, excellent high and low temperature resistance, and good resistance to ultraviolet and ozone, and can adapt to the harsh environment of the sea. After the hydrogen enters the inside of the hollow rubber sleeve 409, the hollow rubber sleeve 409 expands and becomes larger. Because the density of hydrogen is less than that of air, when the hollow rubber sleeve 409 is filled with a large amount of hydrogen, the air gravity displaced by the whole device in the air will be greater than the gravity of hydrogen. Therefore, the buoyancy makes the hollow rubber sleeve 409 rise upward, thereby driving the whole double floating pipe truss structure to move upward and away from the sea surface. When the pressure sensor 414 detects that the air pressure in the hollow rubber sleeve 409 reaches a certain value, the bidirectional air pump 411 can be closed. By using hydrogen to drive the double floating pipe truss structure to move,Thus, the ice block and the like on the sea surface continuously impacting the offshore floating photovoltaic system is prevented, and the damage of the object in the sea to the floating photovoltaic system is reduced. When it is necessary to place the floating photovoltaic system on the sea surface again, the bidirectional air pump 411 is started again, the conveying pipe 413 draws the gas in the hollow rubber sleeve 409 to the inside of the hydrogen tank 410, so that the hydrogen flows back to the inside of the hydrogen tank 410 through the communication pipe 412. When the hydrogen in the hollow rubber sleeve 409 is completely drawn back to the hydrogen tank 410, the hollow rubber sleeve 409 no longer has buoyancy, that is, it will drive the entire double floating pipe truss floating body to return to the sea surface under the action of its own gravity, and then drive the offshore floating photovoltaic system to return to the sea surface. Since hydrogen is flammable and explosive when it encounters high temperature, in order to ensure that the hydrogen tank 410 floating in the sea will not be affected by the bad weather on the sea, when the gas pressure in the hydrogen tank 410 is too high, the safety valve 415 is provided to further ensure the stability of the hydrogen tank 410. The safety valve 415 is an automatic valve and is set above the safe working pressure of the hydrogen tank 410. When the pressure in the tank reaches the preset limit value, the safety valve 415 will automatically open to release part of the gas to reduce the internal pressure, thereby preventing the tank from exploding due to overpressure. The constant temperature sleeve 416 is provided to play a heat preservation role on the hydrogen in the hydrogen tank 410, effectively preventing the hydrogen in the hydrogen tank 410 from being greatly affected by the external temperature. The constant temperature sleeve 416 is made of vacuum insulation board. The vacuum insulation board realizes high heat insulation effect by generating a vacuum between two polystyrene foams, which is very suitable for high-efficiency heat preservation. In addition, the external control system is electrically connected with the tilt sensor 404, the pressure sensor 414 and the safety valve 415.

[0031] The wiring diagram of the tilt sensor 404, the pressure sensor 414 and the safety valve 415 in the present application belongs to the common knowledge in the art, and the working principle is already known technology. The model is selected according to the actual use, so the control mode and wiring arrangement of the tilt sensor 404, the pressure sensor 414 and the safety valve 415 will not be explained in detail.

[0032] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A twin pontoon truss float structure suitable for offshore floating photovoltaic platform comprising two twin pontoon truss assemblies (1) characterized in that: The double floating pipe truss assembly (1) comprises two bottom circular steel pipes (101), the outer surfaces of the two bottom circular steel pipes (101) are fixed with a plurality of vertical inclined web circular steel pipes (103), every two adjacent vertical inclined web circular steel pipes (103) form a group, the outer surfaces of the vertical inclined web circular steel pipes (103) in each group are fixed and welded with vertical straight web circular steel pipes (104), one end of the plurality of vertical inclined web circular steel pipes (103) is fixed and welded with a top circular steel pipe (102), the outer surfaces of the two bottom circular steel pipes (101) are fixed and welded with a plurality of bottom straight web circular steel pipes (105), every two adjacent bottom straight web circular steel pipes (105) form a group, and the outer surfaces of the bottom straight web circular steel pipes (105) in each group are fixed and welded with bottom inclined web circular steel pipes (106).

2. A twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 1, characterized in that: The two ends of the plurality of bottom circular steel pipes (101) are fixed and welded with secondary steel pipe trusses (2), the outer surfaces of the plurality of secondary steel pipe trusses (2) are fixed and welded with a middle steel pipe truss (3), and the outer surfaces of the two bottom circular steel pipes (101) on the inner side are fixed and welded with two bottom support circular steel pipes (5).

3. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 2, characterized in that: The plurality of vertical straight web circular steel pipes (104) are divided into two groups, one end of the vertical straight web circular steel pipes (104) in each group is fixedly connected with the outer surfaces of the two top circular steel pipes (102), and the plurality of vertical straight web circular steel pipes (104) are divided into four groups, one end of the vertical straight web circular steel pipes (104) in each group is fixedly connected with the outer surfaces of the four bottom circular steel pipes (101).

4. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 3, characterized in that: The plurality of bottom inclined web circular steel pipes (106) are grouped on the same side, one side of the four bottom circular steel pipes (101) is a group, and the two ends of the bottom inclined web circular steel pipes (106) in each group are fixedly connected with the outer surfaces of the two bottom circular steel pipes (101), and the outer surfaces of the two bottom support circular steel pipes (5) are fixedly connected with the bottom of the middle steel pipe truss (3).

5. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 4, characterized in that: A protection assembly (4) is arranged between the outer surfaces of the two bottom circular steel pipes (101) on the inner side, and the protection assembly (4) comprises a plurality of connecting heads (401), one end of each connecting head (401) is fixedly welded with the outer surface of the two bottom circular steel pipes (101) on the inner side.

6. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 5, characterized in that: Every two opposite connecting heads (401) form a group, the outer surfaces of the connecting heads (401) in each group are fixed and welded with circular steel pipe racks (402), the outer surfaces of the plurality of circular steel pipe racks (402) are fixed with parallel circular steel pipes (403), and the top portions of the plurality of parallel circular steel pipes (403) are fixed with mounting plates (405).

7. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 6, characterized in that: An inclination sensor (404) for detecting the stability of the double floating pipe truss floating body structure is arranged on the top portion of the mounting plate (405) close to the front surface, a counterweight (406) for keeping the mounting plate (405) in force balance is fixed on the top portion of the mounting plate (405) close to one side edge, and a support column (407) is fixed and welded on the top portion of the mounting plate (405) close to the center.

8. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 7, characterized in that: The top end of the support column (407) is fixed with a tray (408), the inner wall of the tray (408) is provided with a hollow rubber sleeve (409), the top of the mounting plate (405) is fixedly installed with a hydrogen tank (410) near the other side edge through screws, and the top of the mounting plate (405) is provided with a two-way air pump (411).

9. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 8, characterized in that: One end of the two-way air pump (411) is fixedly communicated with a communication pipe (412), one end of the communication pipe (412) penetrates into the inside of the hydrogen tank (410), the other end of the two-way air pump (411) is fixedly communicated with a conveying pipe (413), and one end of the conveying pipe (413) penetrates outside the support column (407) to the inside of the hollow rubber sleeve (409).

10. The twin pontoon truss float structure suitable for offshore floating photovoltaic platform according to claim 9, characterized in that: The outer surface of the support column (407) is provided with a pressure sensor (414), the outer surface of the hydrogen tank (410) is provided with a safety valve (415) for preventing hydrogen explosion, and the outer surface of the hydrogen tank (410) is sleeved with a constant temperature sleeve (416) for heat preservation of hydrogen.

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