Anchor rod mechanical property testing device for simulating moisture and seawater corrosion

Abstract

The invention relates to the technical field of anchor rod performance testing, in particular to an anchor rod mechanical performance testing device for simulating moisture and seawater corrosion, which comprises a base, a corrosion mechanism, a tank cover, a loading mechanism and an external console. The corrosion mechanism comprises a corrosion tank, a through tidal water simulation mechanism is arranged on the periphery of the corrosion tank, a moisture simulation mechanism is arranged in the tank, a three-jaw chuck II is arranged in the center of the bottom of the tank, and an openable discharge hole is formed in the bottom end; the tank cover adapts to the top end of the corrosion tank and is internally provided with a water pressure adjusting assembly; the loading mechanism is fixedly arranged on the base, and is matched with the three-jaw chuck II to limit the anchor rod and apply a load; and the console is electrically connected with each mechanism. The device can simulate the dynamic alternating corrosion environment of the intertidal zone, solves the problem that the real corrosion condition cannot be restored in the existing mode, integrates loading and corrosion mechanisms, and can research the performance degradation rule of the anchor rod under the synergistic effect of corrosion and mechanical load.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt performance testing technology, specifically an anchor bolt mechanical performance testing device that simulates moisture and seawater corrosion. Background Technology

[0002] In marine engineering projects such as port terminals, cross-sea bridges, and offshore wind power foundations, anchor bolts serve as key load-bearing components and are widely used in foundation reinforcement and structural anchoring. Anchor bolts located in the intertidal zone, in particular, must withstand the alternating corrosive environment of periodic seawater immersion and high-humidity exposure. The coupling effect of this corrosion and mechanical load leads to a rapid decline in the mechanical properties of the anchor bolts. Therefore, performance testing of intertidal anchor bolts is especially important.

[0003] In existing technologies, testing is typically conducted in the following two ways: First, the anchor bolts are subjected to corrosion treatment in the laboratory through static seawater immersion or a single humid environment. After corrosion is completed, the anchor bolts are transferred to a testing machine for mechanical property testing. This method cannot simulate the dynamic alternation process of "immersion-exposure" in the intertidal zone, nor can it achieve the synchronous effect of corrosion and mechanical loading, resulting in a large deviation between the test results and the actual service conditions of the anchor bolts.

[0004] 2. The anchor bolts are directly mounted on the actual intertidal zone and exposed naturally for a certain period before being retrieved for testing. Although this method can recreate the real corrosion environment, it has problems such as long cycle time, uncontrollable environmental parameters, and inability to accurately apply preset mechanical loads. Furthermore, it is difficult to capture key node data of corrosion-mechanical coupling failure.

[0005] Therefore, it is necessary to design an integrated test device that can accurately simulate the alternating corrosion environment of intertidal seawater and moisture and apply loads simultaneously. Summary of the Invention

[0006] The purpose of this invention is to provide a test device for the mechanical properties of anchor bolts that simulates moisture and seawater corrosion, so as to solve the problems mentioned in the background art.

[0007] The objective of this invention can be achieved through the following technical solutions: A test apparatus for simulating the mechanical properties of anchor bolts under conditions of moisture and seawater corrosion includes: Base; The corrosion mechanism is fixedly installed on the top surface of the base, including a corrosion tank. A tide simulation mechanism that is connected to the corrosion tank is fixedly installed around the corrosion tank. A moisture simulation mechanism is set in the corrosion tank. A three-jaw chuck is fixedly installed at the center of the bottom of the corrosion tank. An openable and closable discharge port is set at the bottom of the corrosion tank. A tank cover that fits the top of the corrosion tank, with a water pressure regulating component installed in the tank cover; The loading mechanism, which is fixedly installed on the top surface of the base, is used to cooperate with the three-jaw chuck to confine the anchor rod in the corrosion groove and to apply load to the anchor rod. It also includes an external control console, which is electrically connected to the loading mechanism, the tide simulation mechanism, the tidal air simulation mechanism, and the water pressure regulating component.

[0008] Furthermore, the corrosion tank is provided with an annular through groove one and an annular through groove two on its periphery. The annular through groove two is located above the annular through groove one, and the annular through groove one is located near the bottom end of the corrosion tank. Multiple support rods arranged in a circumferential array about the axis of the corrosion groove are fixedly connected between the top and bottom surfaces of the annular through groove. The top and bottom surfaces of the annular through groove 2 are fixedly connected to a plurality of support rods arranged in a circumferential array about the axis of the corrosion groove.

[0009] Furthermore, the tide simulation mechanism includes an outer cylinder sleeved around the corrosion tank. The top and bottom ends of the outer cylinder are sealed to the periphery of the corrosion tank. An annular cavity is formed between the outer cylinder and the periphery of the corrosion tank. The annular cavity communicates with the interior of the corrosion tank through the first annular groove and the second annular groove. Multiple circumferentially arrayed electric push rods are fixedly installed on the top surface of the outer cylinder. The bottom end of the fixed part of the electric push rod penetrates through the top of the outer cylinder to the annular cavity, and the outer periphery of the electric push rod is sealed to the outer cylinder. The telescopic ends of multiple electric push rods are fixedly connected to an annular piston disposed in an annular cavity. The annular piston slides in contact with the periphery of the corrosion tank and the inner wall of the outer cylinder, and the annular piston is located between annular through groove two and annular through groove one. Multiple support legs are fixedly connected between the bottom surface of the outer cylinder and the top surface of the base.

[0010] Furthermore, the moisture simulation mechanism includes an annular float coaxially disposed in the corrosion tank, and a plurality of circumferentially arrayed guide rods are slidably mounted through the top surface of the annular float, with the bottom ends of the guide rods fixedly connected to the inner bottom surface of the corrosion tank. The top surface of the annular float has multiple circumferentially arrayed mounting slots, and an atomizing plate is fixedly installed at the bottom of each mounting slot.

[0011] Furthermore, the groove cover includes a cover body, both ends of which are open structures, and the inner wall of the cover body is provided with internal threads near the bottom end; The water pressure regulating component is provided in the cover.

[0012] Furthermore, the water pressure regulating component includes a boss, and multiple bosses arranged in a circumferential array are fixedly connected to the inner wall of the cover near the top. An electric push rod II is fixedly installed on the top surface of the boss, and the telescopic end of the electric push rod II slides through the boss. The telescopic ends of multiple electric push rod II are fixedly connected to a sealing disc that is slidably installed in the cover. The top surface of the sealing disc has a through hole at the center for the anchor rod to pass through, and a telescopic sealing structure is fixedly connected to the top of the through hole. The top surface of the sealing disc is also provided with a vent.

[0013] Furthermore, the telescopic sealing structure includes a bellows fixedly connected to the top of the through hole, and a through seal is fixedly installed at the other end of the bellows.

[0014] Furthermore, the loading mechanism includes a mounting platform disposed directly above the groove cover, with support columns fixedly connected between the bottom ends of the mounting platform and the top surface of the base, and a reinforcing rod disposed between the support columns and the mounting platform; A hydraulic cylinder coaxial with the corrosion tank is fixedly installed at the middle position of the top surface of the mounting platform. The telescopic end of the hydraulic cylinder slides through the mounting platform and is fixedly installed on the mounting base. A mounting plate is set directly below the mounting base. A three-jaw chuck is fixedly installed at the bottom of the mounting plate. Multiple connecting rods are fixedly connected between the top of the mounting plate and the mounting base. The mounting base is equipped with a pressure sensor for sensing axial force.

[0015] Furthermore, a humidity sensor is installed at the upper part of the corrosion tank, and a salinity sensor and a water pressure sensor are installed at the lower part.

[0016] The beneficial effects of this invention are: 1. This invention achieves dynamic tidal simulation of rising and falling tides through a tidal simulation mechanism and simulates a high-humidity environment through a tidal air simulation mechanism. It can highly reproduce the dynamic alternating corrosion environment of intertidal seawater immersion and tidal air exposure, solving the problem that existing methods cannot simulate real corrosion conditions.

[0017] 2. The integrated design of the loading mechanism and corrosion mechanism in this invention allows for the direct application of axial force to the anchor bolt in a corrosive environment. The pressure sensor provides real-time feedback to achieve closed-loop load control, enabling the study of the performance degradation law of the anchor bolt under the combined action of corrosion and mechanical load.

[0018] 3. This invention can simulate the corrosion and mechanical testing requirements of anchor bolts in different sea areas, at different depths, and under different humidity environments by adjusting tidal parameters, humidity, salinity, and load. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A three-dimensional diagram from another angle; Figure 3 This is a three-dimensional schematic diagram of the connection relationship between the outer cylinder and the corrosion tank in this invention; Figure 4 yes Figure 3 Enlarged view of section A; Figure 5 yes Figure 3 Enlarged view of section B; Figure 6 This is a schematic diagram of the annular floating body; Figure 7 yes Figure 3 Enlarged view of section C; Figure 8 This is a three-dimensional schematic diagram of the groove cover in this invention; Figure 9 This is a three-dimensional schematic diagram of the internal structure of the tank in this invention; Figure 10 yes Figure 9 Enlarged view of section D; The attached figures are labeled as follows: 1-Base, 2-Loading structure, 3-Corrosion tank, 4-Outer cylinder, 5-Discharge port, 6-Support leg, 7-Tank cover, 8-Support column, 9-Mounting platform, 10-Reinforcing rod, 11-Hydraulic cylinder, 12-Mounting seat, 13-Connecting rod, 14-Mounting disc, 15-Three-jaw chuck one, 16-Anchor rod, 17-Annular through groove one, 18-Support rod one, 19-Annular through groove two, 20-Support rod two, 21-Annular cavity, 22-Annular piston, 23-Electric push rod one, 24-Guide rod, 25-Annular float, 26-Mounting groove, 27-Atomizing plate, 28-Cover body, 29-Protrusion, 30-Electric push rod two, 31-Sealing disc, 32-Through hole, 33-Belling pipe, 34-Through seal, 35-Three-jaw chuck two, 36-Ventilation port. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-4 In this embodiment of the invention, a test device for simulating the mechanical properties of anchor bolts under conditions of moisture and seawater corrosion includes: Base 1; The corrosion mechanism is fixedly installed on the top surface of the base 1, including corrosion tank 3. A tide simulation mechanism is fixedly installed around the corrosion tank 3 and communicates with it. A moisture simulation mechanism is set in the corrosion tank 3. A three-jaw chuck 35 is fixedly installed at the center of the bottom of the corrosion tank 3. An openable and closable discharge port 5 is set at the bottom of the corrosion tank 3. A tank cover 7 is adapted to the top of the corrosion tank 3, and a water pressure regulating component is provided in the tank cover 7; The loading mechanism 2, which is fixedly installed on the top surface of the base 1, is used to cooperate with the three-jaw chuck 35 to restrict the anchor rod 16 in the corrosion groove 3 and to apply load to the anchor rod 16. It also includes an external control console that is electrically connected to the loading mechanism 2, the tide simulation mechanism, the tidal air simulation mechanism, and the water pressure regulating component.

[0022] Before the test, salt water with a preset salinity (e.g., 3.5%, simulating natural seawater) is injected into the corrosion tank 3. The bottom end of the anchor rod 16 passes through the tank cover 7 and is fixed to the bottom of the corrosion tank 3 by the three-jaw chuck 2 35. The top end is fixed by the loading mechanism 2 to ensure that the anchor rod 16 is coaxial with the corrosion tank 3. During corrosion simulation, the tide simulation mechanism and the moisture simulation mechanism are activated through the control console to create an alternating environment of seawater immersion and high-humidity moisture exposure in corrosion tank 3. After the corrosion reaches the preset cycle, the loading mechanism 2 is started through the control console, and the mechanical performance test is completed in combination with the deformation of the 16 anchor rods; After the test, open the outlet 5 to drain the brine from the corrosion tank 3, and then clean the device for the next test.

[0023] In this invention, a corrosion mechanism simulates seawater and tidal environments, a loading mechanism applies load to the anchor bolt, and a control console manages the entire testing process. The operation of the tide simulation mechanism and the tidal simulation mechanism achieves the effect of simulating the intertidal environment. The loading mechanism applies load after corrosion or simultaneously to conduct mechanical property tests. Therefore, simultaneous testing of corrosion and loading is achieved, more realistically simulating the actual working conditions of the anchor bolt and improving the accuracy of test data.

[0024] Example 2: Please refer to Figures 1-4 Based on Example 1, the corrosion tank 3 is provided with annular through groove 17 and annular through groove 2 19 on its periphery. The annular through groove 2 19 is located above the annular through groove 17, and the annular through groove 17 is located near the bottom of the corrosion tank 3. Multiple support rods 18 arranged in a circumferential array about the axis of the corrosion tank 3 are fixedly connected between the top and bottom surfaces of the annular through groove 17. Multiple support rods 20 arranged in a circumferential array about the axis of the corrosion tank 3 are fixedly connected between the top and bottom surfaces of the annular through groove 2 19.

[0025] The tide simulation mechanism includes an outer cylinder 4 fitted around the corrosion tank 3. The top and bottom ends of the outer cylinder 4 are sealed with the periphery of the corrosion tank 3. An annular cavity 21 is formed between the outer cylinder 4 and the periphery of the corrosion tank 3. The annular cavity 21 is connected to the interior of the corrosion tank 3 through annular through groove 17 and annular through groove 29. Multiple circumferentially arrayed electric push rods 23 are fixedly installed on the top surface of the outer cylinder 4. The bottom end of the fixed part of the electric push rod 23 penetrates through the top of the outer cylinder 4 to the annular cavity 21, and the outer periphery of the electric push rod 23 is sealed to the outer cylinder 4. The telescopic ends of multiple electric push rods 23 are fixedly connected to an annular piston 22 disposed in an annular cavity 21. The annular piston 22 slides in contact with the periphery of the corrosion tank 3 and the inner wall of the outer cylinder 4, and the annular piston 22 is located between annular through groove 2 19 and annular through groove 17. Multiple support legs 6 are fixedly connected between the bottom surface of the outer cylinder 4 and the top surface of the base 1.

[0026] In this embodiment, the annular through groove 17 and annular through groove 29 opened around the corrosion tank 3 allow the interior of the corrosion tank 3 to communicate with the annular cavity 21 formed between the outer cylinder 4 and the corrosion tank 3; the support rod 18 in the annular through groove 17 and the support rod 20 in the annular through groove 29 can enhance the structural strength of the corrosion tank 3 without affecting the fluid flow, and prevent the corrosion tank 3 from deforming due to internal and external pressure differences or fluid impact.

[0027] When the tide simulation mechanism is working, the control console controls the synchronous extension and retraction of multiple circumferentially arrayed electric push rods 23 on the top surface of the outer cylinder 4: when the electric push rod 23 extends, it pushes the annular piston 22 to slide downward in the annular cavity 21, and the simulated seawater in the annular cavity 21 is compressed and flows into the corrosion tank 3 through the annular channel 17 and the annular channel 29, causing the liquid level in the corrosion tank 3 to rise, simulating the high tide process; when the electric push rod 23 shortens, it pulls the annular piston 22 to slide upward in the annular cavity 21, and the seawater in the corrosion tank 3 flows back to the annular cavity 21 through the annular channel 17 and the annular channel 29, causing the liquid level in the corrosion tank 3 to drop, simulating the low tide process.

[0028] By adjusting the extension frequency, extension amount, and speed of the electric actuator 23 via the control console, the tidal cycle (e.g., simulating semi-diurnal and diurnal tides), tidal range (the rise and fall of the liquid level), and ebb and flow rates can be precisely controlled, thus achieving accurate simulation of the intertidal tidal environment.

[0029] Therefore, in this embodiment, the precise control of the liquid level in the corrosion tank 3 is achieved by raising and lowering the annular piston 22, which can simulate the intertidal environment with different tidal cycles, tidal ranges and ebb and flow rates, and solves the problem that existing laboratory methods cannot simulate dynamic alternating tidal environments.

[0030] Example 3: Please refer to Figures 3-6 Based on Example 1, the moisture simulation mechanism includes an annular float 25 coaxially arranged in the corrosion tank 3. Multiple guide rods 24 arranged in a circumferential array are slidably installed through the top surface of the annular float 25. The bottom end of the guide rods 24 is fixedly connected to the inner bottom surface of the corrosion tank 3. The top surface of the annular float 25 is provided with multiple circumferentially arrayed mounting slots 26, and an atomizing plate 27 is fixedly installed at the bottom of the mounting slot 26.

[0031] In this embodiment, the annular float 25 of the moisture simulation mechanism is coaxially arranged in the corrosion tank 3. It is fixedly connected to the bottom surface of the corrosion tank 3 by multiple circumferential array guide rods 24 penetrating through the top surface. The guide rods 24 guide the annular float 25, so that the annular float 25 can slide along the guide rods 24 as the liquid level in the corrosion tank 3 rises and falls, and always remain floating on the liquid surface.

[0032] Atomizing plates 27 are fixed in multiple circumferential array mounting slots 26 on the top surface of the annular float 25. During the test, the control console supplies power to the atomizing plates 27. The atomizing plates 27 use high-frequency vibration to atomize the brine in the corrosion tank 3 into tiny water mists. The water mists diffuse to the space above the liquid surface in the corrosion tank 3, creating a high-humidity environment in that area. When the tide simulation mechanism causes the liquid surface to rise, the annular float 25 rises with the liquid surface, and the atomizing plates 27 always remain in contact with the liquid surface, ensuring a stable atomization effect. As the liquid level drops, the annular float 25 descends with the liquid level, maintaining contact between the atomizing plate 27 and the liquid surface. By adjusting the power supply of the atomizing plate 27 via the control console, the intensity of the water mist can be controlled, thereby precisely adjusting the humidity above the liquid surface in the corrosion tank 3 (for example, simulating a high-humidity fog environment in the intertidal zone or a high-humidity environment during the rainy season).

[0033] Therefore, in this embodiment, the annular float 25 can move synchronously with the rise and fall of the liquid level to ensure that the atomizing plate 27 is always in contact with the brine, avoid the interruption of atomization due to changes in the liquid level, ensure the continuity and stability of the humidity simulation, and match the humidity environment requirements during the alternating process of intertidal immersion and exposure.

[0034] Multiple circumferential arrays of atomizing plates 27 can generate uniformly distributed water mist, making the humidity of the space above the liquid surface in the corrosion tank 3 uniform, avoiding uneven corrosion of the anchor bolt sample due to local humidity differences, and improving the uniformity of corrosion simulation.

[0035] Precise humidity control can be achieved by adjusting the power of the atomizing plate 27, and simulation tests can be carried out for humidity conditions in different intertidal zones, enhancing the versatility of the device.

[0036] Example 4: Please refer to Figure 1 , Figure 2 and Figures 8-10 Based on embodiment 1, the groove cover 7 includes a cover body 28, both ends of the cover body 28 are open structures, and the inner wall of the cover body 28 is provided with internal threads near the bottom end; A water pressure regulating component is provided in the cover 28; The water pressure regulating component includes a boss 29. Multiple bosses 29 are fixedly connected to the inner wall of the cover 28 near the top. An electric push rod 30 is fixedly installed on the top surface of the boss 29. The telescopic end of the electric push rod 30 slides through the boss 29. The telescopic ends of multiple electric push rods 30 are fixedly connected to a sealing disc 31 that is slidably installed in the cover 28. A through hole 32 is provided at the center of the top surface of the sealing disc 31 for the anchor rod 16 to pass through, and a telescopic sealing structure is fixedly connected to the top of the through hole 32. The top surface of the sealing disc 31 is also provided with a vent 36.

[0037] In this embodiment, the cover 28 of the tank cover 7 is open at both ends, and the internal thread on its inner wall near the bottom can be matched with the external thread at the top of the corrosion tank 3 to achieve a sealed connection between the cover 28 and the corrosion tank 3, ensuring the airtightness of the test environment inside the corrosion tank 3.

[0038] When the water pressure regulating component inside the cover 28 is working, the control console controls the synchronous extension and retraction of the electric push rods 30 on the multiple circumferentially arrayed protrusions 29: when the electric push rods 30 extend, they push the sealing disc 31 to slide downward along the inner wall of the cover 28, compressing the volume of space inside the corrosion tank 3 and increasing the pressure of seawater inside the tank; when the electric push rods 30 shorten, they pull the sealing disc 31 to slide upward, increasing the volume of space inside the corrosion tank 3 and decreasing the pressure of seawater inside the tank.

[0039] By adjusting the extension and retraction of the electric push rod 30 via the control console, the water pressure in the corrosion tank 3 can be precisely controlled, simulating the pressure environment corresponding to different seawater depths, such as low tide, high tide, or shallow sea areas in the intertidal zone.

[0040] The through hole 32 at the center of the top surface of the sealing disc 31 allows the anchor rod 16 to pass through. The telescopic sealing structure at the top of the through hole 32 can form a seal between the anchor rod 16 and the sealing disc 31, preventing seawater from leaking from the through hole 32 during water pressure regulation.

[0041] Therefore, in this embodiment, the water pressure is precisely adjusted by driving the sealing disc 31 to slide through the electric push rod 30, which can simulate the pressure environment at different seawater depths. This solves the problem that existing devices cannot simulate the pressure conditions at different water levels in the intertidal zone, making the corrosion environment simulation closer to the actual use environment of the anchor bolt, and further improving the accuracy of the test results.

[0042] Example 5: Please refer to Figure 9 and Figure 10 Based on embodiment 4, the telescopic sealing structure includes a bellows 33 fixedly connected to the top of the through hole 32, and a through seal 34 fixedly installed at the other end of the bellows 33.

[0043] In the telescopic sealing structure provided in this embodiment, one end of the bellows 33 is fixedly connected to the top of the through hole 32 on the top surface of the sealing disc 31, and the other end is fixedly connected to the through seal 34; the through seal 34 is sleeved around the anchor rod 16, and an elastic seal (such as an O-ring and a V-ring) is provided inside it, which can fit tightly against the outer wall of the anchor rod 16 to achieve a seal between the anchor rod 16 and the through seal 34.

[0044] When the water pressure regulating component drives the sealing disc 31 to rise and fall, the bellows 33 can expand and contract with the movement of the sealing disc 31, thereby compensating for the relative displacement between the sealing disc 31 and the through seal 34. At the same time, when the loading mechanism 2 applies an axial load to the anchor rod 16, causing the anchor rod 16 to undergo slight axial deformation, the expansion and contraction of the bellows 33 can also adapt to the deformation of the anchor rod 16, avoiding the sealing failure between the through seal 34 and the anchor rod 16 due to the deformation of the anchor rod 16.

[0045] Therefore, in this embodiment, the expansion and contraction characteristics of the bellows 33 can adapt to the lifting and lowering displacement of the sealing disc 31 and the axial deformation of the anchor rod 16, ensuring that the through seal 34 and the anchor rod 16 always maintain a stable seal, preventing seawater from leaking from the through hole 32, and ensuring the effectiveness of water pressure regulation and the airtightness of the test environment.

[0046] Example 6: Please refer to Figures 1-3 and Figure 7 Based on embodiment 1, the loading mechanism 2 includes a mounting platform 9 located directly above the groove cover 7. Support columns 8 are fixedly connected between the bottom ends of the mounting platform 9 and the top surface of the base 1. A reinforcing rod 10 is provided between the support columns 8 and the mounting platform 9. A hydraulic cylinder 11, coaxial with the corrosion tank 3, is fixedly installed at the middle position of the top surface of the mounting platform 9. The telescopic end of the hydraulic cylinder 11 slides through the mounting platform 9 and is fixedly installed with a mounting base 12. A mounting plate 14 is provided directly below the mounting base 12. A three-jaw chuck 15 is fixedly installed at the bottom of the mounting plate 14. Multiple connecting rods 13 are fixedly connected between the top of the mounting plate 14 and the mounting base 12. The mounting base 12 is equipped with a pressure sensor for sensing axial force.

[0047] In the loading mechanism 2 provided in this embodiment, the mounting platform 9 is fixed to the top surface of the base 1 by the support columns 8 at both ends. The reinforcing rod 10 between the support column 8 and the mounting platform 9 can enhance the structural rigidity of the mounting platform 9 and prevent the mounting platform 9 from bending and deforming when the hydraulic cylinder 11 is working.

[0048] The hydraulic cylinder 11 in the middle of the top surface of the mounting platform 9 is coaxial with the corrosion tank 3, ensuring that the load applied by the hydraulic cylinder 11 can be transmitted along the axial direction of the anchor rod 16; the telescopic end of the hydraulic cylinder 11 passes through the mounting platform 9 and is fixedly connected to the mounting base 12. The mounting base 12 is connected to the mounting plate 14 through multiple connecting rods 13. The three-jaw chuck 15 at the bottom of the mounting plate 14 is used to fix the top of the anchor rod 16.

[0049] During the test, the control console controls the extension and retraction of the hydraulic cylinder 11: when the hydraulic cylinder 11 retracts, it drives the three-jaw chuck 15 to move upward through the mounting base 12, connecting rod 13, and mounting plate 14, applying axial tension to the anchor rod 16; when the hydraulic cylinder 11 extends, it drives the three-jaw chuck 15 to move downward, applying axial pressure to the anchor rod 16.

[0050] The pressure sensor inside the mounting base 12 can monitor the magnitude of the axial force applied to the anchor rod 16 by the hydraulic cylinder 11 in real time and transmit the force value data to the control console. The control console adjusts the output load of the hydraulic cylinder 11 according to the data fed back by the pressure sensor to achieve precise application of the preset mechanical load. At the same time, combined with the elongation, shortening or load data at the time of fracture of the anchor rod 16, the tensile strength, yield strength, elongation and other mechanical performance parameters of the anchor rod 16 can be calculated.

[0051] The loading mechanism 2 provided in this embodiment is integrated with the corrosion mechanism, which can directly apply load to the anchor bolt 16 in a corrosive environment, realize the coupled testing of corrosion and mechanical load, and better match the actual service conditions of the anchor bolt.

[0052] Example 7: Based on Example 1, a humidity sensor is installed at the upper part of the corrosion tank 3, and a salinity sensor and a water pressure sensor are installed at the lower part.

[0053] In this embodiment, a humidity sensor located at the upper part of the corrosion tank 3 is used to monitor the humidity value of the humid environment above the liquid surface in the corrosion tank 3 in real time, and a salinity sensor located at the lower part is used to monitor the salinity value of the brine in the corrosion tank 3 in real time. The humidity sensor and the salinity sensor transmit the monitored data to an external control console in real time. The control console processes and displays the data: when the humidity value is lower than a preset threshold, the control console automatically increases the power of the atomizing plate 27 to increase the amount of water mist generated, so that the humidity rises to the preset range; when the humidity value is higher than the preset threshold, the power of the atomizing plate 27 is reduced to reduce the amount of water mist generated; when the salinity value increases due to evaporation or other factors, the control console can remind the operator to add fresh water to the corrosion tank 3 to adjust the salinity to the preset value; when the salinity value decreases due to leakage or other factors, it reminds the operator to add brine to ensure that the humidity and salinity remain within the preset range throughout the entire corrosion test.

[0054] The humidity sensor and the moisture simulation mechanism, along with the salinity sensor and the brine environment, form a closed-loop control system, enabling real-time monitoring and automatic adjustment of corrosion environment parameters. This avoids the lag and errors of manual monitoring, ensures the stability and consistency of the corrosion environment, and improves the reliability of experimental data.

[0055] Example 8: This example provides a control implementation method using a console: The external control console is existing technology. Its core hardware is based on an industrial control computer or programmable logic controller, and it is equipped with conventional industrial control components such as a touch screen, data acquisition card, relay module, and power supply module. The software system uses existing industrial control software and has functions such as data acquisition, parameter setting, logic control, data storage, and display. Both the hardware and software mentioned above are mature and common existing technologies in the field of industrial automation. In this embodiment, the control console establishes signal transmission and control links with the loading mechanism 2, the tide simulation mechanism, the moisture simulation mechanism, the water pressure regulating component, the humidity sensor, the salinity sensor, and the water pressure sensor through electrical connections. Specifically: Tide simulation mechanism: The relay module outputs a signal to the electric push rod 23 to control its power supply and forward / reverse rotation to achieve synchronous extension and retraction; combined with the extension and retraction data of the integrated encoder of the electric push rod 23, the lifting height of the annular piston 22 is calculated, and the speed and height of the liquid level rise and fall in the corrosion tank 3 are precisely controlled to achieve tidal cycle and tidal range control.

[0056] Moisture simulation mechanism: outputs an adjustable voltage signal to the atomizing plate 27 to adjust its power supply; receives data from the humidity sensor to form a humidity closed-loop control.

[0057] Water pressure regulating component: outputs a signal to the electric push rod 30 to control synchronous extension and retraction, calculates the lifting distance of the sealing disc 31 by combining the extension and retraction data of its integrated displacement sensor, and uses the water pressure sensor data to accurately adjust the water pressure in the corrosion tank 3 to the preset value.

[0058] Loading mechanism: outputs signals to the hydraulic control system of hydraulic cylinder 11 to control its extension and retraction direction and speed; receives data from the pressure sensor in mounting base 12; adjusts the proportional relief valve to maintain load stability when the force value reaches the preset load; outputs alternating signals when fatigue testing is required to make hydraulic cylinder 11 alternately apply tension and pressure.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A test device for simulating the mechanical properties of anchor bolts under conditions of moisture and seawater corrosion, characterized in that, include: Base (1); The corrosion mechanism is fixedly installed on the top surface of the base (1), including the corrosion tank (3). A tide simulation mechanism is fixedly installed around the corrosion tank (3) and communicates with it. A moisture simulation mechanism is provided in the corrosion tank (3). A three-jaw chuck (35) is fixedly installed at the center of the bottom of the corrosion tank (3). An openable and closable discharge port (5) is provided at the bottom of the corrosion tank (3). A tank cover (7) adapted to the top of the corrosion tank (3), and a water pressure regulating component is provided in the tank cover (7); The loading mechanism (2) is fixedly installed on the top surface of the base (1) to cooperate with the three-jaw chuck (35) to restrict the anchor rod (16) in the corrosion groove (3) and to apply load to the anchor rod (16); And an external control console, which is electrically connected to the loading mechanism (2), the tide simulation mechanism, the tidal air simulation mechanism and the water pressure regulating component.

2. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 1, characterized in that, The corrosion tank (3) is provided with an annular through groove one (17) and an annular through groove two (19) on its periphery. The annular through groove two (19) is located above the annular through groove one (17), and the annular through groove one (17) is close to the bottom of the corrosion tank (3). The top and bottom surfaces of the annular through groove (17) are fixedly connected to a plurality of support rods (18) arranged in a circumferential array about the axis of the corrosion groove (3). The top and bottom surfaces of the annular through groove 2 (19) are fixedly connected to a plurality of support rods 2 (20) arranged in a circumferential array about the axis of the corrosion groove (3).

3. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 2, characterized in that, The tide simulation mechanism includes an outer cylinder (4) sleeved around the corrosion tank (3). The top and bottom ends of the outer cylinder (4) are sealed with the periphery of the corrosion tank (3). An annular cavity (21) is formed between the outer cylinder (4) and the periphery of the corrosion tank (3). The annular cavity (21) is connected to the interior of the corrosion tank (3) through the annular through groove one (17) and the annular through groove two (19). The top surface of the outer cylinder (4) is fixedly installed with multiple circumferentially arrayed electric push rods (23). The bottom end of the fixed part of the electric push rod (23) penetrates through the top of the outer cylinder (4) to the annular cavity (21), and the outer periphery of the electric push rod (23) is sealed to the outer cylinder (4). The telescopic ends of multiple electric push rods (23) are fixedly connected to an annular piston (22) disposed in an annular cavity (21). The annular piston (22) slides in contact with the periphery of the corrosion tank (3) and the inner wall of the outer cylinder (4), and the annular piston (22) is located between annular through groove two (19) and annular through groove one (17). Multiple legs (6) are fixedly connected between the bottom surface of the outer cylinder (4) and the top surface of the base (1).

4. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 1, characterized in that, The moisture simulation mechanism includes an annular float (25) coaxially arranged in the corrosion tank (3). The top surface of the annular float (25) is slidably mounted with a plurality of circumferentially arrayed guide rods (24). The bottom end of the guide rods (24) is fixedly connected to the inner bottom surface of the corrosion tank (3). The top surface of the annular float (25) is provided with a plurality of circumferentially arrayed mounting slots (26), and an atomizing plate (27) is fixedly installed at the bottom of the mounting slot (26).

5. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 1, characterized in that, The groove cover (7) includes a cover body (28), both ends of which are open structures, and the inner wall of the cover body (28) is provided with internal threads near the bottom end; The water pressure regulating component is provided in the cover (28).

6. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 5, characterized in that, The water pressure regulating component includes a boss (29). Multiple bosses (29) arranged in a circumferential array are fixedly connected to the inner wall of the cover (28) near the top. An electric push rod (30) is fixedly installed on the top surface of the boss (29). The telescopic end of the electric push rod (30) slides through the boss (29). The telescopic ends of multiple electric push rods (30) are fixedly connected to a sealing disc (31) that is slidably installed in the cover (28). The sealing disc (31) has a through hole (32) at the center of its top surface for the anchor rod (16) to pass through, and a telescopic sealing structure is fixedly connected to the top of the through hole (32). The top surface of the sealing disc (31) is also provided with a vent (36).

7. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 6, characterized in that, The telescopic sealing structure includes a bellows (33) fixedly connected to the top of the through hole (32), and a through seal (34) is fixedly installed at the other end of the bellows (33).

8. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 1, characterized in that, The loading mechanism (2) includes a mounting platform (9) set directly above the groove cover (7). The bottom two ends of the mounting platform (9) are fixedly connected to the top surface of the base (1) with support columns (8). A reinforcing rod (10) is provided between the support columns (8) and the mounting platform (9). A hydraulic cylinder (11) coaxial with the corrosion tank (3) is fixedly installed at the middle position of the top surface of the mounting platform (9). The telescopic end of the hydraulic cylinder (11) slides through the mounting platform (9) and is fixedly installed with a mounting seat (12). A mounting plate (14) is provided directly below the mounting seat (12). A three-jaw chuck (15) is fixedly installed at the bottom end of the mounting plate (14). Multiple connecting rods (13) are fixedly connected between the top end of the mounting plate (14) and the mounting seat (12). The mounting base (12) is provided with a pressure sensor for sensing axial force.

9. The anchor bolt mechanical performance testing device simulating moisture and seawater corrosion according to claim 1, characterized in that, A humidity sensor is installed at the upper part of the corrosion tank (3), and a salinity sensor and a water pressure sensor are installed at the lower part.

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