Testing device and method for simulating dry-wet cycle corrosion of offshore wind power foundation steel member

Abstract

The invention relates to a test device for simulating dry-wet cycle corrosion of an offshore wind power foundation steel member, a supporting top rod is arranged at the top of a test water tank, a nylon rope is connected to the supporting top rod and droops downwards into the test water tank, and a plurality of epoxy magnets are vertically bound on the nylon rope at intervals and used for adsorbing the steel member. A first submersible pump is arranged at the bottom in the test water tank; a drainage port of the first submersible pump leads to the liquid storage tank through a first drainage pipe; artificial seawater is stored in the liquid storage tank, a second submersible pump is arranged at the bottom of the inner tank, and a drainage port of the second submersible pump leads to the test water tank through a second drainage pipe; according to the invention, the pumping and storage circulation of artificial seawater is realized between the test water tank and the liquid storage tank, so that the dry-wet cycle corrosion process of the offshore wind power foundation steel member in the marine environment can be simulated, and the corrosion test of the steel member under multiple groups of different dry-wet time ratio conditions can be simultaneously carried out; and a simple and reliable technical means is provided for researching the influence mechanism of the dry-wet time ratio on the corrosion behavior of the steel member.

Description

Technical Field

[0001] The invention relates to a test device and a method for simulating dry-wet cycle corrosion of offshore wind power foundation steel components, belonging to the technical field of marine engineering corrosion durability testing. Background Art

[0002] Offshore wind power foundations are exposed to harsh marine environments such as high temperature, high humidity and high salt spray for a long time. Due to multiple factors, the corrosion phenomenon is particularly significant, posing a severe challenge to the long-term stability of the foundation structure. During operation, offshore wind power foundations are inevitably affected by dry-wet cycles caused by factors such as wave splashes and tides, which further aggravates the corrosion process and has become an urgent problem to be considered and solved in the current design and construction of offshore wind power foundations. The existing test equipment and methods for dry-wet cycle corrosion of offshore wind power foundation steel components in the marine environment mostly rely on actual sea tests and large-scale test equipment with high customization costs, and cannot provide a simple and economical test method. Summary of the invention

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

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components, including a test water tank, a liquid storage tank, a steel component, a supporting top rod, a nylon rope, an epoxy magnet, a first and a second submersible pump, a first and a second drainage pipe, and artificial seawater; A supporting top rod is arranged on the top of the test water tank, the nylon rope is connected to the supporting top rod and hangs down into the test water tank, the epoxy magnets are provided in plurality and are vertically spaced and tied to the nylon rope to adsorb the steel component, a first submersible pump is arranged at the bottom of the test water tank, and the drainage port of the first submersible pump leads to the liquid storage tank through a first drainage pipe; Artificial seawater is stored in the liquid storage tank, and a second submersible pump is arranged at the bottom of the inner tank. The drainage port of the second submersible pump leads to the test water tank through a second drainage pipe.

[0005] Preferably, the supporting top rod is composed of a plurality of rod bodies which are fixedly arranged in a horizontal and vertical cross pattern, and the top end of the nylon rope is tied to the horizontal and vertical cross nodes of the rod bodies.

[0006] Preferably, the epoxy magnets are provided with through holes to facilitate the insertion and binding of nylon ropes.

[0007] Preferably, the first submersible pump is fixedly connected to the inner bottom of the test water tank.

[0008] Preferably, the second submersible pump is fixedly connected to the inner bottom of the liquid storage tank.

[0009] Preferably, the first drain pipe extends into the tank along the top opening of the liquid storage tank.

[0010] Preferably, the second drain pipe extends into the test water tank along the top opening of the tank.

[0011] Preferably, smart sockets are respectively connected in series in the power supply circuits of the first and second submersible pumps, and the smart sockets are wirelessly connected to the mobile terminal to control the timed pumping between the test water tank and the liquid storage tank via the mobile terminal.

[0012] Preferably, only one side of the steel component is a corrosion exposed surface, and the remaining surfaces are coated with epoxy resin and then adsorbed on the epoxy magnet.

[0013] A method for simulating dry-wet cycle corrosion of offshore wind power foundation steel components comprises the following steps: Step S1: setting up a test water tank and a liquid storage tank, installing a supporting mandrel, a first submersible pump and a second submersible pump, connecting the smart socket in series in the power supply circuits of the first submersible pump and the second submersible pump, and wirelessly connecting the smart socket to the mobile terminal; Step S2: placing nylon ropes and tying epoxy magnets at different elevations, leaving only one side of the steel component as the corrosion exposed surface, and coating the remaining surfaces with epoxy resin to adsorb the steel component onto the epoxy magnets; Step S3: adding artificial seawater into the liquid storage tank so that the artificial seawater can submerge all steel components when pumped into the test water tank, and the remaining liquid after pumping can exceed the lowest water level of the second submersible pump; Step S4: Control the on-off time of the submersible pump through the mobile terminal to realize water pumping and water storage between the test water tank and the liquid storage tank, and start the corrosion test; Step S5: During the test, the nylon rope is taken out at a predetermined time, and the steel components at different elevations are sampled, weighed and tested to analyze the effects of different dry-wet time ratios on the corrosion behavior of the steel components.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. It can control the power on and off of the first and second submersible pumps to accurately control the periodic changes of the water level and save manpower; 2. By simultaneously adsorbing steel components at different heights on the same nylon rope, multiple corrosion tests under the control of dry-wet time ratio conditions can be carried out simultaneously, with high test efficiency; 3. By using nylon ropes with different load-bearing capacities and epoxy magnets with different suction forces, it can adapt to the test of steel components of various sizes, and the test is highly scalable.

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the adsorption state of steel components.

[0018] In the figure: a test water tank 1, a liquid storage tank 2, a steel structure 3, a supporting top rod 4, a nylon rope 5, an epoxy magnet 6, a first submersible pump 7, a second submersible pump 8, a first drain pipe 9, a second drain pipe 10, a smart socket 11, and a mobile terminal 12. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] like Figure 1~2 As shown, this embodiment provides a test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components, including a test water tank 1, a liquid storage tank 2, a steel component 3, a support top rod 4, a nylon rope 5, an 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; A supporting top rod is arranged on the top of the test water tank, the nylon rope is connected to the supporting top rod and hangs down into the test water tank, the epoxy magnets are provided in plurality and are vertically spaced and tied to the nylon rope to adsorb the steel component, a first submersible pump is arranged at the bottom of the test water tank, and the drainage port of the first submersible pump leads to the liquid storage tank through a first drainage pipe; Artificial seawater is stored in the liquid storage tank, and a second submersible pump is arranged at the bottom of the tank, and a drainage port of the second submersible pump leads to a test water tank through a second drainage pipe; The placement height of the epoxy magnet can be adjusted according to the dry-wet time ratio.

[0023] In the embodiment of the present invention, the supporting top rod is composed of a plurality of rod bodies which are fixedly arranged in a horizontal and vertical cross pattern, and the top end of the nylon rope is tied to the horizontal and vertical cross nodes of the rod bodies.

[0024] In the embodiment of the present invention, through holes are provided on the epoxy magnets to facilitate the insertion and binding of nylon ropes.

[0025] In an embodiment of the present invention, the first submersible pump is fixedly connected to the inner bottom of the test water tank.

[0026] In an embodiment of the present invention, the second submersible pump is fixedly connected to the inner bottom of the liquid storage tank.

[0027] In the embodiment of the present invention, the first drainage pipe extends into the tank along the top opening of the liquid storage tank.

[0028] In the embodiment of the present invention, the second drainage pipe extends into the test water tank along the top opening of the test water tank.

[0029] In the embodiment of the present invention, smart sockets 11 are respectively connected in series in the power supply circuits of the first and second submersible pumps, and the smart sockets are wirelessly connected to the mobile terminal 12 to control the timed pumping between the test water tank and the liquid storage tank via the mobile terminal.

[0030] The power on and off of the first and second submersible pumps can be jointly controlled through the smart socket and the mobile terminal, which can be used to remotely and accurately control the periodic changes of the water level and save manpower.

[0031] In the embodiment of the present invention, only one side of the steel component is a corrosion exposed surface, and the remaining surfaces are coated with epoxy resin and then adsorbed on the epoxy magnet.

[0032] A method for simulating dry-wet cycle corrosion of offshore wind power foundation steel components comprises the following steps: Step S1: setting up a test water tank and a liquid storage tank, installing a supporting mandrel, a first submersible pump and a second submersible pump, connecting the smart socket in series in the power supply circuits of the first submersible pump and the second submersible pump, and wirelessly connecting the smart socket to the mobile terminal; Step S2: placing nylon ropes and tying epoxy magnets at different elevations, leaving only one side of the steel component as the corrosion exposed surface, and coating the remaining surfaces with epoxy resin to adsorb the steel component onto the epoxy magnets; Step S3: adding artificial seawater into the liquid storage tank so that the artificial seawater can submerge all steel components when pumped into the test water tank, and the remaining liquid after pumping can exceed the lowest water level of the second submersible pump; Step S4: Control the on-off time of the submersible pump through the mobile terminal to realize water pumping and water storage between the test water tank and the liquid storage tank, and start the corrosion test; Step S5: During the test, the nylon rope is taken out at a predetermined time, and the steel components at different elevations are sampled, weighed and tested to analyze the effects of different dry-wet time ratios on the corrosion behavior of the steel components.

[0033] The advantage of the above design is that when conducting corrosion tests under different dry-wet time ratios, it is only necessary to change the fixed position of the steel component in step S2 to obtain corroded steel components under different dry-wet time ratios.

[0034] The present invention can simulate the dry-wet cycle corrosion process of offshore wind power foundation steel components in the marine environment by realizing the pumping and storage circulation of artificial seawater between the test water tank and the liquid storage tank, and can simultaneously carry out corrosion tests on the steel components under multiple groups of different dry-wet time ratios, providing a simple and reliable technical means for studying the influence mechanism of the dry-wet time ratio on the corrosion behavior of steel components.

[0035] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components, characterized by: It includes a test water tank, a liquid storage tank, steel components, a supporting top rod, a nylon rope, an epoxy magnet, the first and second submersible pumps, the first and second drainage pipes, and artificial seawater; A supporting top rod is arranged on the top of the test water tank, the nylon rope is connected to the supporting top rod and hangs down into the test water tank, the epoxy magnets are provided in plurality and are vertically spaced and tied to the nylon rope to adsorb the steel component, a first submersible pump is arranged at the bottom of the test water tank, and the drainage port of the first submersible pump leads to the liquid storage tank through a first drainage pipe; Artificial seawater is stored in the liquid storage tank, and a second submersible pump is arranged at the bottom of the inner tank. The drainage port of the second submersible pump leads to the test water tank through a second drainage pipe.

2. The test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components according to claim 1, characterized in that: The supporting top rod is composed of a plurality of rod bodies which are fixedly arranged in a horizontal and vertical cross pattern, and the top end of the nylon rope is tied to the horizontal and vertical cross nodes of the rod bodies.

3. The test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components according to claim 1, characterized in that: The epoxy magnets are all provided with through holes, which are convenient for passing and tying the nylon rope.

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

5. The test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components according to claim 1, characterized in that: The second submersible pump is fixedly connected to the inner bottom of the liquid storage tank.

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

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

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

9. The test device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components according to claim 1, characterized in that: Only one side of the steel component is a corrosion exposed surface, and the remaining surfaces are coated with epoxy resin and then adsorbed on the epoxy magnet.

10. A method for testing a device for simulating dry-wet cycle corrosion of offshore wind power foundation steel components according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: setting up a test water tank and a liquid storage tank, installing a supporting mandrel, a first submersible pump and a second submersible pump, connecting the smart socket in series in the power supply circuits of the first submersible pump and the second submersible pump, and wirelessly connecting the smart socket to the mobile terminal; Step S2: placing nylon ropes and tying epoxy magnets at different elevations, leaving only one side of the steel component as the corrosion exposed surface, and coating the remaining surfaces with epoxy resin to adsorb the steel component onto the epoxy magnets; Step S3: adding artificial seawater into the liquid storage tank so that the artificial seawater can submerge all steel components when pumped into the test water tank, and the remaining liquid after pumping can exceed the lowest water level of the second submersible pump; Step S4: Control the on-off time of the submersible pump through the mobile terminal to realize water pumping and water storage between the test water tank and the liquid storage tank, and start the corrosion test; Step S5: During the test, the nylon rope is taken out at a predetermined time, and the steel components at different elevations are sampled, weighed and tested to analyze the effects of different dry-wet time ratios on the corrosion behavior of the steel components.

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