An automatic lifting tidal corrosion simulation experimental device

Abstract

The invention discloses an automatic lifting type tidal corrosion simulation experimental device, including an experimental pool, a fixed installation mechanism, a tide control module and an experimental test piece, the experimental pool is connected with an inlet pipeline and a drainage pipeline, the inlet pipeline and the drainage pipeline are both provided with a solenoid valve, the side wall of the experimental pool is fixed with an experimental test piece through a vertical pole, the bottom of the experimental pool is provided with a tide control module through a fixed installation mechanism, an air pipeline is provided on one side of the tide control module, a connecting pipeline is provided from the tide control module to the surface of the fixed installation mechanism, a three-way pipeline is provided at the bottom of the fixed installation mechanism, the three-way pipeline is respectively connected with the connecting pipeline, the air pipeline and the drainage pipeline, and the tide control module and the solenoid valves on the inlet pipeline and the drainage pipeline are all connected with the control module in communication. The invention can effectively simulate the corrosion condition of the sea area with a large tidal range, simulate the diurnal tide or semi-diurnal tide in the marine environment with one key, and accelerate the corrosion law of the tide.

Description

Technical Field

[0001] The invention relates to the technical field of experimental testing equipment, in particular to an automatic lifting type tidal corrosion simulation experimental device. Background Art

[0002] During the service of marine engineering materials, the corrosion environment they are in includes five zones: marine atmosphere zone, wave splash zone, seawater tidal zone, seawater full immersion zone, and seabed mud zone. The tidal zone refers to the area between the average low tide level and the average high tide level of seawater. Due to the movement of tides and ocean currents, the oxygen content of seawater is relatively high. The environmental characteristics of metal components in the tidal zone are that they are immersed in seawater during high tide and exposed to the air during low tide. The frequent alternation of dry and wet makes the surface salt concentration very high. The tidal zone is located between high water level and low water level. At high water level, the material is immersed in oxygen-rich seawater to produce seawater corrosion, and at low water level, it is in contact with air to cause atmospheric corrosion. The seawater in the tidal zone is in contact with the air, and oxygen is easy to reach, resulting in the formation of an oxygen concentration gradient at different locations in the tidal zone. Due to the different oxygen concentrations in seawater at different locations in the tidal zone, an oxygen concentration difference battery is formed, which causes oxygen concentration difference corrosion of the materials in the tidal zone. In the tidal zone-full immersion zone, the tidal waterline moves back and forth, and the corrosion potential and current of the metal in this environment will change. The long specimens in the tidal range area and the full immersion area will form macroscopic corrosion cells, which are quite different from the corrosion of the short specimens in the same position. Therefore, studying the corrosion behavior of specimens in the tidal range area is of great significance for studying the corrosion state of marine structures.

[0003] In order to intuitively study the law of corrosion potential changes of materials in real sea environment with the rise and fall of tide level, domestic and foreign researchers have accumulated corrosion data of typical metal materials in tidal range areas through real sea hanging test. The corrosion of metal materials in different positions in the tidal range area is also different. During the tide, when the metal material is immersed in seawater, the surface of the material changes from a dry state to a wet state, the solution resistance changes, and the corrosion potential shifts positively; during the ebb tide, as the liquid film gradually evaporates, the surface of the material becomes drier and drier, the solution resistance increases, and the corrosion potential of the metal material continues to decrease; after being exposed to the water surface, the potential continues to decrease until it experiences the tide again and the potential increases. The corrosion rate in the mid-tide area is faster than that in the high tide area and the low tide area. As the tide level decreases, the open circuit potential continues to decrease. The cathode process in the highest tide area is mainly controlled by oxygen reduction, and the cathode process in the mid- and low tide areas is controlled by rust reduction during the tide, and controlled by oxygen reduction during the ebb tide. The potential change process in the lowest tide area has nothing to do with the rise and fall of tides.

[0004] Although the results obtained from the real sea coupon corrosion experiment are consistent with the actual situation, the data is true and accurate. However, the experimental cycle is long, consumes a lot of manpower and material resources, and it is difficult to reflect the mechanism of action of a single factor, which is not suitable for the study of corrosion mechanism. Electrochemical tests in the laboratory can quickly reflect the corrosion tendency and law of materials, but the accuracy is still far behind that of real sea coupons. Therefore, it is urgent to develop a large-scale tidal zone simulation device to simulate the corrosion law of any tidal speed such as semi-diurnal tide and full-day tide in the tidal range zone of seawater, and to scientifically evaluate the corrosion resistance of materials and coatings in the tidal range zone. Summary of the invention

[0005] In order to overcome the above problems existing in the prior art, the present invention proposes an automatic lifting type tidal corrosion simulation experimental device.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an automatic lifting tidal corrosion simulation experimental device, including an experimental water pool, a fixed installation mechanism, a tide control module and an experimental test piece, the experimental water pool is connected with an inlet pipeline and a drainage pipeline, and the inlet pipeline and the drainage pipeline are both provided with solenoid valves, the side wall of the experimental water pool is fixed with an experimental test piece through a vertical pole, the bottom of the experimental water pool is installed with a tide control module through a fixed installation mechanism, an air pipeline is provided on one side of the tide control module, a connecting pipeline is provided from the tide control module to the surface of the fixed installation mechanism, a three-way pipeline is provided at the bottom of the fixed installation mechanism, the three-way pipeline is respectively connected with the connecting pipeline, the air pipeline and the drainage pipeline, and the tide control module and the solenoid valves on the inlet pipeline and the drainage pipeline are all communicatively connected with the control module.

[0007] In the above-mentioned automatic lifting tidal corrosion simulation experimental device, the fixed installation mechanism includes a base and a fixed platform, the fixed platform is fixed to the bottom of the experimental water pool through the base, and a tide level control module is installed above the fixed platform.

[0008] The above-mentioned automatic lifting tidal corrosion simulation experimental device, the tide control module includes a motor, a screw, a water level control board, a low tide limit plate and a column, one end of the column is fixed to the surface of the fixed mounting mechanism, and a mounting plate is arranged at the other end of the column, a motor is installed above the mounting plate, the output end of the motor is fixedly connected to the screw, a connecting plate is sleeved on the screw, the bottom surface of the connecting plate is connected to the water level control board through a connecting column, a water outlet is arranged in the middle of the water level control board, a low tide limit plate is fixed on the corresponding column below the water level control board, and a through hole connected to the connecting pipeline is arranged in the middle of the low tide limit plate.

[0009] In the above-mentioned automatic lifting tidal corrosion simulation experimental device, the depth of the experimental water pool is greater than 5m, and the movement displacement of the water level control plate is greater than 2m.

[0010] In the above-mentioned automatic lifting tidal corrosion simulation experimental device, a water outlet pipe is arranged below the water level control plate corresponding to the water outlet, and the water outlet pipe is connected to the connecting pipeline.

[0011] In the above-mentioned automatic lifting type tidal corrosion simulation experimental device, the water outlet pipe is a retractable hose.

[0012] In the above-mentioned automatic lifting tidal corrosion simulation experimental device, the water outlet pipe is a sleeve with a diameter smaller than that of the connecting pipeline. When the water level control panel is in the highest position, the water outlet pipe is still located inside the connecting pipeline.

[0013] The above-mentioned automatic lifting tidal corrosion simulation experimental device, the experimental test piece runs through the entire highest water level and the lowest water level, ensuring that the uppermost test piece is still above the water level and not immersed at the highest water level, and the lowermost test piece does not appear above the water surface at the lowest water level.

[0014] In the above-mentioned automatic lifting type tidal corrosion simulation experimental device, the experimental test piece includes an electrical connection test piece and a wire, and a plurality of the electrical connection test pieces are provided, and the plurality of the electrical connection test pieces are electrically connected through the wire.

[0015] In the above-mentioned automatic lifting type tidal corrosion simulation experimental device, the vertical pole is made of polytetrafluoroethylene material.

[0016] The beneficial effects of the present invention are: (1) the device can automatically control the power motor by the computer system, and adjust the height of the seawater level in the experimental water pool at any time and place;

[0017] (2) The displacement height of the high tide horizontal plate and the low tide horizontal plate is greater than 2 m, which can effectively simulate the corrosion conditions in sea areas with large tidal ranges;

[0018] (3) The device can also be set up through the control module to automatically control the time and speed of seawater rise and fall in stages, simulate the diurnal or semi-diurnal tide in the marine environment with one click, and accelerate the corrosion law of tide. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of a tide level control module of the present invention;

[0022] Figure 3 Schematic diagram of the experimental test piece of the present invention.

[0023] In the figure, 1. experimental water pool, 2. water inlet pipe, 3. air pipe, 4. motor, 5. column, 6. screw, 7. connecting plate, 8. connecting column, 9. water level control board, 10. low tide limit plate, 11. three-way pipe, 12. solenoid valve, 13. drainage pipe, 14. connecting pipe, 15. base, 16. fixed platform, 17. experimental test piece, 17-1. electrical connection test piece, 17-2. wire, 17-3. pole, 18. water outlet. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] See attached Figure 1-2 The present embodiment discloses an automatic lifting type tidal corrosion simulation experimental device, including an experimental pool 1, an experimental test piece 17, a base 15 and a fixed platform 16. The experimental pool 1 is connected with an inlet pipe 2 and a drainage pipe 13. The inlet pipe and the drainage pipe are provided with a solenoid valve 12. The side wall of the experimental pool 1 is fixed with an experimental test piece 17 through a vertical rod 17-3. The fixed platform 16 is fixed to the bottom of the experimental pool 1 through the base 15. An air pipe 3 is provided above one side of the fixed platform 16, and a column 5 is installed above the other side. The column 5 is provided with four pillars, and the other end of the column 5 is provided with a A mounting plate is arranged, a motor 4 is installed above the mounting plate, an output end of the motor 4 is fixedly connected to a screw rod 6, a connecting plate 7 is sleeved on the screw rod 6, the bottom surface of the connecting plate 7 is connected to a water level control plate 9 through a connecting column 8, a water outlet 18 is arranged in the middle of the water level control plate 9, a low tide limit plate 10 is fixed on the corresponding column 5 below the water level control plate 9, a through hole is arranged in the middle position of the low tide limit plate 10, the through hole is connected to a connecting pipeline 14, a three-way pipeline 11 is arranged at the bottom of the fixed platform 16, and the three-way pipeline 11 is respectively connected to the connecting pipeline 14, the air pipeline 3 and the drainage pipeline 13.

[0026] In order to realize automatic control, the motor 4 and the solenoid valves 12 on the water inlet pipeline and the drainage pipeline are all communicatively connected with the control module.

[0027] Particularly, the depth of the experimental water pool is greater than 5 m, and the movement displacement of the water level control plate 9 is greater than 2 m.

[0028] It should be noted that a water outlet pipe is provided below the water level control plate 9 corresponding to the water outlet 18 , and the water outlet pipe is connected to the connecting pipeline 14 .

[0029] The water outlet pipe may be a retractable hose or a sleeve with a diameter smaller than that of the connecting pipeline. When the water level control panel 9 is at the highest position, the water outlet pipe is still located inside the connecting pipeline 14 .

[0030] Reference Figure 3In this embodiment, the experimental test piece 17 includes an electrical connection test piece 17-1, a wire 17-2 and a vertical rod 17-3. There are multiple electrical connection test pieces 17-1, and the multiple electrical connection test pieces 17-1 are electrically connected through the wire 17-2. The electrical connection test piece 17-1 runs through the entire highest water level and the lowest water level to ensure that the uppermost test piece is still above the water level and not submerged at the highest water level, and the lowermost test piece does not appear above the water surface at the lowest water level.

[0031] In addition, the vertical pole 17-3 is made of polytetrafluoroethylene material.

[0032] When this embodiment is actually used, the device can automatically control the motor through the control module, and the motor drives the water level control plate to move up and down, and arbitrarily adjust the height of the seawater level in the experimental pool. At the same time, the displacement height of the high tide level plate and the low tide level plate is greater than 2m, which can effectively simulate the corrosion conditions in sea areas with large tidal ranges. The device can also be set through the control module to automatically control the time and speed of seawater rise and fall in stages, simulate the full-day tide or half-day tide in the marine environment with one button, and accelerate the corrosion law of tides, and scientifically evaluate the corrosion resistance of materials and coatings in tidal range areas.

[0033] The principle of water level change in the experimental pool of this embodiment is as follows: under the experimental state, the water inlet pipe 2 and the drainage pipe 13 are in a normally open state, and the motor drives the water level control plate to move up and down. Since a water outlet is provided in the middle position of the water level control plate, the lower part of the water outlet is connected to the connecting pipe through a water outlet pipe. When the water inflow of the water inlet pipe 2 exceeds the water level control plate, water passes through the connecting pipe and the three-way pipe from the water outlet and is discharged through the drainage pipe. The air pipe can balance the water pressure and facilitate drainage. When the water inflow of the water inlet pipe is small and the water level is lower than the water level control plate, the control module controls the solenoid valve of the water inlet pipe to open wider to increase the water inflow. At the same time, the solenoid valve of the drainage pipe is opened narrower or closed to reduce the drainage volume, thereby realizing water level control.

[0034] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An automatic lifting tidal corrosion simulation experimental device, characterized in that: It includes an experimental water pool, a fixed installation mechanism, a tide control module and an experimental test piece. The experimental water pool is connected with a water inlet pipeline and a drainage pipeline. The water inlet pipeline and the drainage pipeline are both provided with solenoid valves. The side wall of the experimental water pool is fixed with an experimental test piece through a vertical pole. The bottom of the experimental water pool is provided with a tide control module through a fixed installation mechanism. An air pipeline is provided on one side of the tide control module. A connecting pipeline is provided from the tide control module to the surface of the fixed installation mechanism. A three-way pipeline is provided at the bottom of the fixed installation mechanism. The three-way pipeline is respectively connected with the connecting pipeline, the air pipeline and the drainage pipeline. The tide control module and the solenoid valves on the water inlet pipeline and the drainage pipeline are all communicatively connected with the control module. The fixed installation mechanism includes a base and a fixed platform, the fixed platform is fixed to the bottom of the experimental pool through the base, and a tide level control module is installed above the fixed platform; The tide control module includes a motor, a screw, a water level control board, a low tide limit plate and a column. One end of the column is fixed to the surface of the fixed mounting mechanism, and a mounting plate is arranged at the other end of the column. A motor is installed above the mounting plate, and an output end of the motor is fixedly connected to the screw. A connecting plate is sleeved on the screw, and the bottom surface of the connecting plate is connected to the water level control board through a connecting column. A water outlet is arranged in the middle of the water level control board, and a low tide limit plate is fixed on the corresponding column below the water level control board, and a through hole connected to the connecting pipeline is arranged in the middle of the low tide limit plate.

2. The automatic lifting type tidal corrosion simulation experimental device according to claim 1 is characterized in that: The depth of the experimental water pool is greater than 5m, and the movement displacement of the water level control plate is greater than 2m.

3. The automatic lifting type tidal corrosion simulation experimental device according to claim 1 is characterized in that: A water outlet pipe is arranged below the water level control plate corresponding to the water outlet, and the water outlet pipe is communicated with the connecting pipeline.

4. The automatic lifting type tidal corrosion simulation experimental device according to claim 3 is characterized in that: The water outlet pipe is a retractable hose.

5. The automatic lifting type tidal corrosion simulation experimental device according to claim 3 is characterized in that: The water outlet pipe is a sleeve with a diameter smaller than that of the connecting pipeline. When the water level control panel is at the highest position, the water outlet pipe is still located inside the connecting pipeline.

6. The automatic lifting type tidal corrosion simulation experimental device according to claim 1 is characterized in that: The test piece runs through the entire highest water level and the lowest water level, ensuring that the uppermost test piece is still above the water level and not submerged at the highest water level, and the lowermost test piece does not appear above the water surface at the lowest water level.

7. The automatic lifting type tidal corrosion simulation experimental device according to claim 1 is characterized in that: The experimental test piece includes an electrical connection test piece and a wire. A plurality of the electrical connection test pieces are provided, and the plurality of electrical connection test pieces are electrically connected to each other through the wire.

8. The automatic lifting type tidal corrosion simulation experimental device according to claim 1 is characterized in that: The vertical pole is made of polytetrafluoroethylene material.

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