Test apparatus and method for simulating dry-wet cycle corrosion of steel components for offshore wind turbine foundations

Abstract

This invention relates to a test apparatus for simulating wet-dry cycle corrosion of steel components for offshore wind turbine foundations. A support rod is installed at the top of the test tank, and nylon ropes are connected to the support rods and lowered into the test tank. Multiple epoxy magnets are vertically spaced and tied to the nylon ropes to attract the steel components. A first submersible pump is installed at the bottom of the test tank, and its outlet connects to a storage tank via a first drain pipe. The storage tank contains artificial seawater, and a second submersible pump is installed at its bottom, with its outlet connecting to the test tank via a second drain pipe. This invention simulates the wet-dry cycle corrosion process of steel components for offshore wind turbine foundations in a marine environment by circulating artificial seawater between the test tank and the storage tank. Furthermore, it allows for simultaneous corrosion tests of steel components under multiple sets of different wet-dry time ratios, providing a simple and reliable technical means for studying the influence mechanism of wet-dry time ratio on the corrosion behavior of steel components.

Description

Technical Field

[0001] This invention relates to a test apparatus and method for simulating the dry-wet cycle corrosion of offshore wind turbine foundation steel components, belonging to the field of marine corrosion durability testing technology. Background Technology

[0002] Offshore wind turbine foundations are exposed to harsh marine environments characterized by high temperatures, high humidity, and high salt spray for extended periods. Under the influence of multiple factors, corrosion is particularly pronounced, posing a severe challenge to the long-term stability of the foundation structure. During operation, offshore wind turbine foundations are inevitably subjected to wet-dry cycles caused by wave splash and tides, which further exacerbates the corrosion process, becoming a pressing issue that needs to be addressed in the design and construction of offshore wind turbine foundations. Currently available testing equipment and methods for wet-dry cycle corrosion of offshore wind turbine foundation steel components in marine environments largely rely on actual sea trials and custom-designed, costly large-scale testing equipment, failing to provide a simple and economical testing method. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a test device and method for simulating the dry and wet cycle corrosion of offshore wind power foundation steel components, which is simple in structure and easy to operate.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a test device for simulating the dry and wet cycle corrosion of steel components of offshore wind power foundations, including a test water tank, a liquid storage tank, steel components, a support rod, nylon rope, epoxy magnet, first and second submersible pumps, first and second drain pipes, and artificial seawater;

[0005] The test water tank is equipped with a support rod at the top. The nylon rope is connected to the support rod and hangs down into the test water tank. Multiple epoxy magnets are vertically spaced and tied to the nylon rope to attract steel components. The bottom of the test water tank is equipped with a first submersible pump. The drain outlet of the first submersible pump is connected to the liquid storage tank through a first drain pipe.

[0006] The storage tank contains artificial seawater, and a second submersible pump is installed at the bottom of the tank. The drain outlet of the second submersible pump is connected to the test water tank via a second drain pipe.

[0007] Preferably, the support rod is composed of several rods fixed in a cross-shaped arrangement, and the top end of the nylon rope is tied to the cross-shaped node of the rod.

[0008] Preferably, each epoxy magnet has through holes to facilitate the threading and binding of nylon ropes.

[0009] Preferably, the first submersible pump is fixedly connected to the bottom of the test water tank.

[0010] Preferably, the second submersible pump is fixedly connected to the inner bottom of the storage tank.

[0011] Preferably, the first drain pipe extends into the tank along the top opening of the storage tank.

[0012] Preferably, the second drain pipe extends into the test water tank along the top opening of the tank.

[0013] Preferably, a smart socket is connected in series in the power supply circuits of the first and second submersible pumps, and the smart socket is wirelessly connected to a mobile terminal to control the timed pumping and storage between the test water tank and the storage tank via the mobile terminal.

[0014] Preferably, the steel component has only one side exposed to corrosion, while the other sides are coated with epoxy resin and then adsorbed onto epoxy magnets.

[0015] A method for simulating wet-dry cycle corrosion of steel components in offshore wind turbine foundations using a test apparatus, comprising the following steps:

[0016] Step S1: Set up the test water tank and storage tank, install the support rod, the first and second submersible pumps, connect the smart socket in series in the power supply circuit of the first and second submersible pumps respectively, and wirelessly connect it to the mobile terminal;

[0017] Step S2: Place nylon ropes and tie epoxy magnets at different elevations, leaving only one side of the steel component exposed to corrosion, and apply epoxy resin to the other sides to attach the steel component to the epoxy magnets.

[0018] Step S3: Add artificial seawater to the storage tank so that when the artificial seawater is pumped into the test water tank, it can submerge all steel components, and at the same time, the remaining liquid after pumping can exceed the minimum water level line of the second submersible pump.

[0019] Step S4: Control the power-on and power-off time of the submersible pump through the mobile terminal to realize the pumping and storage of water between the test water tank and the storage tank, and start the corrosion test;

[0020] Step S5: During the experiment, the nylon rope was removed at the predetermined time, and samples were taken, weighed and tested on steel components at different elevations to analyze the effect of different wet-dry time ratios on the corrosion behavior of steel components.

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

[0022] 1. It can precisely control the periodic changes in water level by controlling the power on and off of the first and second submersible pumps, saving manpower;

[0023] 2. By simultaneously adsorbing steel components at different elevations on the same nylon rope, multiple corrosion tests under controlled wet-dry time ratio conditions can be conducted simultaneously, resulting in high testing efficiency.

[0024] 3. By using nylon ropes with different load-bearing capacities and epoxy magnets with different attraction forces, it can adapt to the testing of steel components of various sizes, and the testing is highly expandable.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the structure of an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the adsorption state of the steel component.

[0028] In the diagram: 1. Test water tank; 2. Storage tank; 3. Steel component; 4. Support rod; 5. Nylon rope; 6. Epoxy magnet; 7. First submersible pump; 8. Second submersible pump; 9. First drain pipe; 10. Second drain pipe; 11. Smart socket; 12. Mobile terminal. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] like Figures 1-2 As shown, this embodiment provides a test device for simulating the dry-wet cycle corrosion of offshore wind power foundation steel components, including a test water tank 1, a liquid storage tank 2, steel components 3, a support rod 4, nylon rope 5, epoxy magnet 6, a first submersible pump 7, a second submersible pump 8, a first drain pipe 9, a second drain pipe 10, and artificial seawater.

[0033] The test water tank is equipped with a support rod at the top. The nylon rope is connected to the support rod and hangs down into the test water tank. Multiple epoxy magnets are vertically spaced and tied to the nylon rope to attract steel components. The bottom of the test water tank is equipped with a first submersible pump. The drain outlet of the first submersible pump is connected to the liquid storage tank through a first drain pipe.

[0034] The storage tank contains artificial seawater, and a second submersible pump is installed at the bottom of the tank. The drain outlet of the second submersible pump is connected to the test water tank through a second drain pipe.

[0035] The placement elevation of the epoxy magnet can be adjusted according to the wet-dry time ratio.

[0036] In this embodiment of the invention, the supporting top rod is composed of several rods fixedly arranged in a horizontal and vertical cross-section, and the top end of the nylon rope is tied to the horizontal and vertical cross-section nodes of the rods.

[0037] In this embodiment of the invention, the epoxy magnets are provided with through holes to facilitate the threading and binding of nylon ropes.

[0038] In this embodiment of the invention, the first submersible pump is fixedly connected to the bottom of the test water tank.

[0039] In this embodiment of the invention, the second submersible pump is fixedly connected to the inner bottom of the storage tank.

[0040] In this embodiment of the invention, the first drain pipe extends into the tank along the top opening of the storage tank.

[0041] In this embodiment of the invention, the second drain pipe extends into the test water tank along the top opening of the tank.

[0042] In this embodiment of the invention, smart sockets 11 are connected in series in the power supply circuits of the first and second submersible pumps, and the smart sockets are wirelessly connected to mobile terminals 12 to control the timed pumping and storage between the test water tank and the storage tank via the mobile terminal.

[0043] It can control the power on / off status of the first and second submersible pumps through a smart socket and a mobile terminal, enabling remote and precise control of the periodic changes in water level and saving manpower.

[0044] In this embodiment of the invention, the steel component has only one side exposed to corrosion, while the other sides are coated with epoxy resin and then adsorbed onto epoxy magnets.

[0045] A method for simulating wet-dry cycle corrosion of steel components in offshore wind turbine foundations using a test apparatus, comprising the following steps:

[0046] Step S1: Set up the test water tank and storage tank, install the support rod, the first and second submersible pumps, connect the smart socket in series in the power supply circuit of the first and second submersible pumps respectively, and wirelessly connect it to the mobile terminal;

[0047] Step S2: Place nylon ropes and tie epoxy magnets at different elevations, leaving only one side of the steel component exposed to corrosion, and apply epoxy resin to the other sides to attach the steel component to the epoxy magnets.

[0048] Step S3: Add artificial seawater to the storage tank so that when the artificial seawater is pumped into the test water tank, it can submerge all steel components, and at the same time, the remaining liquid after pumping can exceed the minimum water level line of the second submersible pump.

[0049] Step S4: Control the power-on and power-off time of the submersible pump through the mobile terminal to realize the pumping and storage of water between the test water tank and the storage tank, and start the corrosion test;

[0050] Step S5: During the experiment, the nylon rope was removed at the predetermined time, and samples were taken, weighed and tested on steel components at different elevations to analyze the effect of different wet-dry time ratios on the corrosion behavior of steel components.

[0051] The advantage of the above design is that when conducting corrosion tests under different wet-dry time ratios, it is only necessary to change the fixed position of the steel component in step S2 to obtain the corroded steel component under different wet-dry time ratios.

[0052] This invention simulates the corrosion process of offshore wind power foundation steel components in a wet-dry cycle in a marine environment by pumping and storing artificial seawater between a test water tank and a storage tank. It can also conduct corrosion tests on steel components under multiple sets of different wet-dry time ratios simultaneously, providing a simple and reliable technical means to study the influence mechanism of wet-dry time ratio on the corrosion behavior of steel components.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A test apparatus for simulating wet-dry cycle corrosion of steel components for offshore wind turbine foundations, characterized in that: Includes test water tank, liquid storage tank, steel components, support rods, nylon ropes, epoxy magnets, first and second submersible pumps, first and second drainage pipes, and artificial seawater; The test water tank is equipped with a support rod at the top. The nylon rope is connected to the support rod and hangs down into the test water tank. Multiple epoxy magnets are vertically spaced and tied to the nylon rope to attract steel components. The bottom of the test water tank is equipped with a first submersible pump. The drain outlet of the first submersible pump is connected to the liquid storage tank through a first drain pipe. The storage tank contains artificial seawater, and a second submersible pump is installed at the bottom of the tank. The drain outlet of the second submersible pump is connected to the test water tank through a second drain pipe. The method for simulating the dry-wet cycle corrosion of steel components in offshore wind turbine foundations includes the following steps: Step S1: Set up the test water tank and storage tank, install the support rod, the first and second submersible pumps, connect the smart socket in series in the power supply circuit of the first and second submersible pumps respectively, and wirelessly connect it to the mobile terminal; Step S2: Place nylon ropes and tie epoxy magnets at different elevations, leaving only one side of the steel component exposed to corrosion, and apply epoxy resin to the other sides to attach the steel component to the epoxy magnets. Step S3: Add artificial seawater to the storage tank so that when the artificial seawater is pumped into the test water tank, it can submerge all steel components, and at the same time, the remaining liquid after pumping can exceed the minimum water level line of the second submersible pump. Step S4: Control the power-on and power-off time of the submersible pump through the mobile terminal to realize the pumping and storage of water between the test water tank and the storage tank, and start the corrosion test; Step S5: During the experiment, the nylon rope was removed at the predetermined time, and samples were taken, weighed and tested on steel components at different elevations to analyze the effect of different wet-dry time ratios on the corrosion behavior of steel components.

2. The test apparatus for simulating wet-dry cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The supporting top rod is composed of several rods fixed in a cross-shaped arrangement, and the top end of the nylon rope is tied to the cross-shaped nodes of the rods.

3. The test apparatus for simulating wet-dry cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: Each epoxy magnet has through holes to facilitate the threading and binding of nylon ropes.

4. The test apparatus for simulating wet-dry cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The first submersible pump is fixedly connected to the bottom of the test water tank.

5. The test apparatus for simulating dry-wet cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The second submersible pump is fixedly connected to the bottom of the reservoir.

6. The test apparatus for simulating wet-dry cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The first drain pipe extends into the tank along the top opening of the storage tank.

7. The test apparatus for simulating dry-wet cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The second drain pipe extends into the test water tank along the top opening of the tank.

8. The test apparatus for simulating dry-wet cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The power supply circuits of the first and second submersible pumps are connected in series with smart sockets, which are wirelessly connected to mobile terminals to control the timed pumping and storage between the test water tank and the storage tank via the mobile terminals.

9. The test apparatus for simulating wet-dry cycle corrosion of offshore wind turbine foundation steel components according to claim 1, characterized in that: The steel component has only one side exposed to corrosion, while the other sides are coated with epoxy resin and then adsorbed onto epoxy magnets.

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