A model test device for offshore photovoltaic pile foundation

Abstract

The utility model provides a kind of model test device for offshore photovoltaic pile foundation, including test flume system, load loading system, data acquisition system, central control system and test pile, wherein test flume system includes the test flume with predetermined volume;Wind load loading system, water flow load loading control system and wave load loading system are set around test flume system;Multiple groups of environmental data acquisition systems are arranged in test flume system;Multiple test piles are installed in the middle of test flume system, and test data acquisition system is arranged on test pile.The utility model can simulate in different marine environment and offshore load working condition better, realize real-time monitoring and adjustment to offshore photovoltaic pile foundation load working condition, eliminate the influence of wave load by model test device itself boundary effect, simultaneously realize the real-time accurate collection of test pile foundation load parameter, lay a solid foundation for the acquisition of relevant load calculation parameter and the cost optimization of offshore photovoltaic pile foundation.

Description

Technical Field

[0001] This utility model relates to a model test device for offshore photovoltaic pile foundations, which is applicable to the field of offshore photovoltaics. Background Technology

[0002] Offshore photovoltaic (PV) refers to PV power plants built in the ocean that convert solar energy at sea into electricity. Because offshore PV sites are built at sea, their foundations, compared to onshore PV sites, need to consider not only wind and snow loads but also loads caused by waves and ocean currents.

[0003] Currently, there is no sound standard system for calculating wave and current loads on offshore photovoltaic (PV) foundations. When referring to other standard systems for structural design, the design system is relatively conservative. At the same time, offshore PV is currently very sensitive to construction costs. Therefore, it is necessary to obtain suitable parameters for calculating wave and current loads on offshore PV through model tests, so as to reduce the project cost while ensuring the structural safety and reliability of offshore PV projects.

[0004] While existing marine photovoltaic (PV) foundation model testing devices can simulate parameters such as tide level, wave height, water flow velocity, and wind in the sea area where the PV foundation is located, they have the following problems:

[0005] (1) Lack of verification and feedback system. Although most existing model test devices can set test parameters such as tide level, wave height, water flow velocity, and wind speed according to the test requirements, they lack an integrated sensing-control structure, which makes it impossible to form a closed monitoring-correction loop in the structure;

[0006] (2) Insufficient test accuracy. Due to the limited size of the model test device, after the wave load is applied to the water tank model, it is easily affected by the water tank boundary effect, which can easily form interference waves and affect the accuracy of the test;

[0007] (3) Existing model test equipment cannot flexibly control the wind speed, wind direction and other parameters of wind load.

[0008] (4) Existing model test equipment cannot effectively simulate the sea conditions of rising and falling tides and extreme tide levels. Utility Model Content

[0009] The purpose of this invention is to provide a model testing device for offshore photovoltaic pile foundations, overcoming the problems existing in current model testing devices, such as the lack of real-time verification-feedback structures, insufficient wave damping and boundary disturbance suppression structures, inadequate wind load control, and imperfect sea state regulation simulation components. To this end, this invention adopts the following technical solution:

[0010] A model testing device for offshore photovoltaic (PV) pile foundations includes a test water tank system, a load loading system, a data acquisition system, a central control system, and test pile foundations. The test water tank system includes a test water tank with a predetermined volume, suitable for accommodating water of sufficient volume to meet testing requirements. The load loading system includes a wind load loading system, a water flow load loading control system, and a wave load loading system. The data acquisition system includes an environmental load data acquisition system and a test data acquisition system, respectively used to collect environmental load parameters within the test water tank system and load data of the test pile body in real time. The central control system is used to set load parameters and receive real-time load parameters within the test water tank system. Multiple test pile foundations are installed inside the test water tank system.

[0011] Furthermore, the wind load loading system consists of a fan that can provide uniform wind speed, a rotating shaft, a base, rollers, and slide rails; the fan is used to apply wind load to the test pile foundation according to the wind load requirements of the test pile foundation and the test conditions; the rotating shaft is used to adjust the direction of the wind load application; and the rollers and slide rails are used to adjust the position of the wind load application.

[0012] Furthermore, the water flow load control system includes a water outlet device, a return device, a connecting water pipe, a flow rate control power device, and a backup water tank; the flow rate control power device, the water outlet device, the test water tank system, the return device, and the backup water tank are connected in series through the connecting water pipe to form a water circulation loop; the water outlet device and the return device are arranged on opposite sides of the test water tank system and are arranged at preset intervals along the length of the water tank.

[0013] Furthermore, the wave load loading system includes a wave-generating device and a wave-dissipating device. The wave-generating device is installed on the opposite sides of the test water tank system; the wave-dissipating device is installed on each water tank wall of the test water tank system to absorb waves reflected by the water tank walls and reduce the interference of reflected waves on the test pile foundation.

[0014] Furthermore, the wave-generating device and the wave-eliminating device consist of a wave-generating plate, a servo driver, a servo motor, and an encoder.

[0015] Furthermore, the environmental load acquisition system includes a wind speed acquisition system, a water flow velocity acquisition system, and a wave element acquisition system; the wind speed acquisition system is used to acquire wind speed and direction information at the top of the test tank system in real time; the water flow velocity acquisition system is used to acquire water flow velocity information inside the test tank system in real time; the wave element acquisition system is used to acquire wave height, wave period, and wave wavelength information inside the test tank system in real time; the environmental load acquisition system is set up in multiple groups to acquire marine environmental load information located at different positions inside the test tank system.

[0016] Furthermore, the test data acquisition system includes a pile bearing capacity acquisition system, used to collect data on pile displacement, axial force, shear force, and bending moment.

[0017] Furthermore, the central control system is also communicatively connected to the load loading system, and is used to send control signals to the load loading system;

[0018] The central control system can also communicate with the load acquisition system to receive real-time load data collected by the load acquisition system within the scope of the test water tank system.

[0019] The central control system can also communicate with the test data acquisition system and can receive data on displacement, axial force, shear force and bending moment of the test pile foundation.

[0020] Furthermore, the test pile foundation is a model pile of an engineering pile made according to a preset scale ratio.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention proposes a model testing device for offshore photovoltaic (PV) pile foundations. It can effectively simulate the wave, current, and wind loads experienced by offshore PV pile foundations in a marine environment, as well as extreme water levels and tidal conditions. This allows for real-time monitoring and adjustment of the load conditions on the offshore PV pile foundations, eliminating the influence of the boundary effects of the model testing device itself on wave loads. Simultaneously, it enables real-time and accurate collection of load parameters for the test pile foundations, thereby improving the accuracy of the model test and laying a solid foundation for obtaining relevant load calculation parameters and optimizing the cost of offshore PV pile foundations. Attached Figure Description

[0023] Figure 1 This is a plan view of the model test device for offshore photovoltaic pile foundations according to this utility model;

[0024] Figure 2 This is a control system diagram of the model test device for offshore photovoltaic pile foundations according to this utility model;

[0025] Figure 3 This is a structural diagram of the wind load loading system of this utility model;

[0026] The labels in the attached diagram are as follows: 1-Test water tank system, 2-Load loading system, 21-Wind load loading system, 211-Fan, 212-Rotating shaft, 213-Base, 214-Roller, 215-Slide rail, 22-Water flow load loading control system, 221-Water outlet device, 222-Return device, 223-Connecting water pipe, 224-Flow velocity control power device, 225-Backup water tank, 23-Wave load loading system, 3-Data acquisition system, 31-Environmental load data acquisition system, 311-Wind data acquisition system, 312-Wave data acquisition system, 313-Water flow data acquisition system, 32-Test data acquisition system, 4-Central control system, 5-Test pile foundation. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] This embodiment provides an offshore photovoltaic power plant. The maximum wind speed at the project site is 40 m / s, the average vertical current velocity is 1.5 m / s, the water depth in the photovoltaic field area is 3-5 m, the wave height is 3.5 m with a 50-year return period, the maximum wave direction is NE, the wave period is 6.5 s, and steel pipe piles with a diameter of 1000 mm and a wall thickness of 10 mm are used. The scale ratio is 50.

[0029] like Figure 1-3 As shown, a model test device for offshore photovoltaic pile foundations comprises five parts: a test water tank system 1, a load loading system 2, a data acquisition system 3, a central control system 4, and a test pile foundation 5. The test water tank system 1 includes a large-sized test water tank with a predetermined volume. Taking this embodiment as an example, its dimensions are 54.0m × 13.2m × 1.0m, suitable for accommodating a large volume of water sufficient for the test requirements. Five sets of wind load loading systems 21 and nine sets of wave load loading systems 23 are set on each of the adjacent sides of the test water tank system 1 to simulate wind and waves in different directions. A set of one water flow load loading control system 22 is set on each of the opposite sides of the test water tank system 1. The wind load loading system 21 and the water flow load loading control system 23... The system 22 and the wave load loading system 23 together form the load loading system 2, which is used to simulate the marine environment of marine photovoltaics; several sets of environmental data acquisition systems 31 are set in the test tank system 1 to collect the load data inside the test tank system 1; multiple test piles 5 are installed in the middle of the test tank system 1, and test data acquisition systems 32 are set on the test piles 5 to collect the load data of the pile body of the test pile foundation 5; the environmental load data acquisition system 31 and the test data acquisition system 32 together form the data acquisition system 3.

[0030] like Figure 1-3As shown, the wind load loading system 21 consists of a fan 211, a rotating shaft 212, a base 213, rollers 214, and a slide rail 215. The fan 211 can provide uniform wind speeds of different levels for the model test. The fan 211 is mounted on the rotating shaft 212, and the direction of the wind load can be controlled by the rotating shaft 212. The base 213 is set at the lower part of the rotating shaft 212, the rollers 214 are installed at the lower part of the base 213, and the slide rail 215 is set at the lower part of the rollers 214, which can control the position where the wind load is applied.

[0031] like Figure 1 As shown, the water flow load control system 22 consists of a water outlet device 221, a return device 222, a connecting water pipe 223, a flow rate control power device 224, and a spare water tank 225. The water flow load control system 22 can control the flow rate of the water by changing the power of the flow rate control power device 224. The flow rate control power device 224, the water outlet device 221, the test water tank system 1, the return device 222, and the spare water tank 225 are connected in series through the connecting water pipe 223 to form a water circulation loop. The water circulation loop ensures that the test water is recycled and reduces the waste of water resources during the test.

[0032] like Figure 1-2 As shown, 10 sets of water outlet devices 221 and return devices 222 are arranged at preset intervals along the length of the water tank on both sides of the test water tank system 1, which can provide a uniform and stable water flow velocity for the test water tank system 1. By keeping the flow rates of the water outlet devices 221 and return devices 222 and the water storage capacity of the backup water tank 225 constant, sea conditions such as normal water level and extreme water level can be simulated. Increasing the flow rate of the water outlet devices 221 and decreasing the flow rate of the return devices 222, while the backup water tank 225 starts to release water, can simulate the high tide sea conditions of the offshore photovoltaic field. Decreasing the flow rate of the water outlet devices 221 and increasing the flow rate of the return devices 222, while the backup water tank 225 starts to store water, can simulate the low tide sea conditions of the offshore photovoltaic field.

[0033] like Figure 1-2 As shown, the wave load loading system 23 includes a wave-generating device 231 and a wave-dissipating device 232, which are composed of a wave-generating plate, a servo driver, a servo motor, and an encoder. The wave-generating device 231 is installed on the walls of the test water tank system 1 on both sides. The central control system 4 sends different wave simulation control signals to it to simulate waves of different directions, wave heights, and periods. The wave-dissipating device 232 is installed on the perimeter walls of the test water tank system 1, which can absorb the waves around the test water tank system 1 and prevent the test pile foundation 5 from being interfered with by the waves reflected from the perimeter walls.

[0034] like Figure 1-2As shown, the environmental load acquisition system 31 includes a wind speed acquisition system 311, a water flow velocity acquisition system 312, and a wave element acquisition system 313. The environmental load acquisition system 31 is configured in multiple groups to collect environmental load information located at different locations inside the test tank system 1. Among them, the wind speed acquisition system 311 can collect information such as wind speed and wind direction at the top of the test tank system 1 in real time; the water flow velocity acquisition system 312 can collect information such as water flow velocity inside the test tank system 1 in real time; and the wave element acquisition system 313 can collect information such as wave height, wave period, and wave wavelength inside the tank system 1 in real time.

[0035] like Figure 1-2 As shown, the test data acquisition system 32 is a pile bearing capacity acquisition system, which can collect data such as pile displacement, axial force, shear force and bending moment.

[0036] The central control system can communicate with the load loading system, load acquisition system, and test data acquisition system. The central control system can set the basic parameters of wind load, water flow load, and wave load based on the marine environment through scale conversion results. It can control the flow rate of the outlet device 211 and return device 212 to control high tide, low tide, normal water level, and extreme tidal conditions. Simultaneously, the central control system 1 can receive and display the loads collected by the load acquisition system 31 within the test flume system 1 in real time, and correct the load parameters of the load system 2 according to test requirements. The central control system 1 can also receive, display, and record data such as pile displacement, axial force, shear force, and bending moment.

[0037] like Figure 1 As shown, the test pile 5 is a model pile obtained by scaling down the engineering pile to a certain extent.

[0038] The above embodiments are merely preferred technical solutions of this utility model. Those skilled in the art should understand that modifications or substitutions to the technical solutions or parameters in the embodiments can be made without departing from the principles and essence of this utility model, and all such modifications or substitutions should be covered within the protection scope of this utility model.

Claims

1. A model test device for offshore photovoltaic pile foundations, characterized in that, The system includes a test water tank system, a load loading system, a data acquisition system, a central control system, and test pile foundations. The test water tank system includes a test water tank with a predetermined volume, suitable for containing water of a volume sufficient to meet the test requirements. The load loading system includes a wind load loading system, a water flow load loading control system, and a wave load loading system. The data acquisition system includes an environmental load data acquisition system and a test data acquisition system, respectively used to collect environmental load parameters within the test water tank system and load data of the test piles in real time. The central control system is used to set load parameters and receive real-time load parameters within the test water tank system. Multiple test pile foundations are installed inside the test water tank system.

2. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The wind load application system consists of a fan that can provide uniform wind speed, a rotating shaft, a base, rollers, and slide rails. The fan is used to apply wind load to the test pile foundation according to the wind load requirements of the test pile foundation and the test conditions. The rotating shaft is used to adjust the direction of the wind load application. The rollers and slide rails are used to adjust the position of the wind load application.

3. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The water flow load control system includes a water outlet device, a return device, a connecting water pipe, a flow rate control power device, and a backup water tank; the flow rate control power device, the water outlet device, the test water tank system, the return device, and the backup water tank are connected in series through the connecting water pipe to form a water circulation loop; the water outlet device and the return device are arranged on opposite sides of the test water tank system and are arranged at preset intervals along the length of the water tank.

4. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The wave load loading system includes a wave-generating device and a wave-dissipating device. The wave-generating device is installed on the opposite sides of the test water tank system. The wave-dissipating device is installed on each water tank wall of the test water tank system to absorb the waves reflected by the water tank wall and reduce the interference of the reflected waves on the test pile foundation.

5. The model test device for offshore photovoltaic pile foundations according to claim 4, characterized in that, The wave-generating device and wave-eliminating device consist of a wave-generating plate, a servo driver, a servo motor, and an encoder.

6. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The environmental load data acquisition system includes a wind speed acquisition system, a water flow velocity acquisition system, and a wave element acquisition system. The wind speed acquisition system is used to collect real-time wind speed and direction information at the top of the test tank system. The water flow velocity acquisition system is used to collect real-time water flow velocity information inside the test tank system. The wave element acquisition system is used to collect real-time wave height, wave period, and wave wavelength information inside the test tank system. The environmental load data acquisition system is configured in multiple groups to collect marine environmental load information located at different positions within the test tank system.

7. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The test data acquisition system includes a pile bearing capacity acquisition system, which is used to collect data on pile displacement, axial force, shear force, and bending moment.

8. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The central control system is also communicatively connected to the load loading system and is used to send control signals to the load loading system. The central control system can also communicate with the load acquisition system to receive real-time load data collected by the load acquisition system within the scope of the test water tank system. The central control system can also communicate with the test data acquisition system and can receive data on displacement, axial force, shear force and bending moment of the test pile foundation.

9. The model test device for offshore photovoltaic pile foundations according to claim 1, characterized in that, The test pile foundation is a model pile of an engineering pile made according to a preset scale.

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