An accelerated corrosion test device for testing the erosion resistance of concrete

Abstract

The utility model discloses a kind of for concrete erosion resistance performance test's accelerated corrosion test device, it is related to concrete performance test equipment technical field, including cabin, stock solution tank, mixing tank and recovery tank, the support net board is fixedly installed between inside both sides of the cabin, the support net board top is placed with multiple concrete samples.The utility model can simultaneously realize the multi-factor synergic simulation of corrosion medium spraying, dry-wet cycle and dynamic stress loading, high-pressure atomizing nozzle can be evenly sprayed different types of corrosion medium, infrared heating plate and exhaust fan cooperation can quickly adjust cabin temperature and humidity, realize the dry-wet cycle switching of high humidity and low humidity, hydraulic cylinder and force sensor, loading pressure head combination can apply stable axial pressure to concrete sample, perfect reproduction complex corrosion and load coaction scene that concrete structure faces in actual engineering, effectively reduce the deviation of test result and actual service condition, test data reference value significantly improves.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete performance testing equipment, specifically to an accelerated corrosion testing device for testing the erosion resistance of concrete. Background Technology

[0002] In the field of civil engineering, concrete structures often face corrosive environments such as seawater, saline-alkali soil, and industrial wastewater, which leads to a decrease in structural strength and a shortened service life. In order to assess the corrosion resistance of concrete in advance, it is necessary to simulate the long-term corrosion process through accelerated corrosion tests.

[0003] However, existing accelerated corrosion testing devices mostly use a single corrosive medium immersion or fixed electric field acceleration method, which cannot simulate the complex environment of dry-wet cycle, corrosive medium and stress synergy in actual engineering. The test results deviate significantly from the actual service conditions, and there is a lack of real-time monitoring of the internal corrosion state of concrete. Data can only be obtained by destroying the sample, which makes continuous tracking impossible. At the same time, the control accuracy of parameters such as corrosive medium concentration and temperature is low, and the test repeatability is poor. Therefore, we propose an accelerated corrosion testing device for testing the erosion resistance of concrete. Utility Model Content

[0004] In view of the problems existing in the current accelerated corrosion testing device for testing the erosion resistance of concrete, this utility model is proposed.

[0005] Therefore, the purpose of this invention is to provide an accelerated corrosion testing device for testing the erosion resistance of concrete. This invention solves the problems of existing accelerated corrosion testing devices, which mostly use a single corrosive medium immersion or fixed electric field acceleration method, which cannot simulate the complex environment of dry-wet cycle, corrosive medium and stress synergy in actual engineering. The test results deviate greatly from the actual service conditions. Furthermore, there is a lack of real-time monitoring of the internal corrosion state of concrete, and the need to destroy the sample to obtain data, which makes continuous tracking impossible. At the same time, the control accuracy of parameters such as corrosive medium concentration and temperature is low, and the test repeatability is poor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An accelerated corrosion testing device for testing the erosion resistance of concrete includes a chamber, a raw material tank, a mixing tank, and a recovery tank. A support mesh plate is fixedly installed between the two sides inside the chamber. Multiple concrete samples are placed on the top of the support mesh plate. A spray pipe is fixedly installed on the top of the chamber. Multiple high-pressure atomizing nozzles are fixedly installed at the bottom of the multiple spray pipes. Multiple hydraulic cylinders are fixedly installed inside the chamber. Force sensors are fixedly installed at the moving ends of the multiple hydraulic cylinders. Loading heads are fixedly installed at the bottom of the multiple force sensors. Fixing plates are fixedly installed on the surface of the multiple loading heads. Displacement controllers and ultrasonic probes are fixedly installed at the bottom of both sides of the multiple fixing plates.

[0007] Preferably, infrared heating plates are fixedly installed on both sides of the interior of the cabin, an exhaust fan is provided through one side of the top of the cabin, and a temperature and humidity sensor is fixedly installed inside the cabin.

[0008] Preferably, one side of the chamber is provided with a raw liquid tank, a mixing tank and a recovery tank, and the top of each raw liquid tank, mixing tank and recovery tank is provided with a sealing cover, and the top of each of the sealing covers is provided with a vent valve.

[0009] Preferably, a first conveying pipe is fixedly installed between the outlet of the raw liquid tank and one side of the mixing tank, and a dosing pump is provided on the surface of the first conveying pipe. A second conveying pipe is provided between the outlet of the mixing tank and the inlet of the spray pipe, and a conveying pump and a flow regulating valve are provided on the surface of the second conveying pipe.

[0010] Preferably, a return liquid pipe is fixedly installed between the recovery tank and the bottom of the chamber, and an electromagnetic valve is provided on the surface of the return liquid pipe. A third conveying pipe is fixedly installed between the discharge port of the recovery tank and the inlet of the mixing tank, and a filter pump is provided on the surface of the third conveying pipe. An ion concentration sensor is fixedly installed on the surface of the mixing tank.

[0011] Preferably, the surface of the cabin is provided with a controller, the surface of the controller is provided with a touch screen, and the controller is electrically connected to the interior of the cabin.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model, through the synergistic action of the spray pipe, high-pressure atomizing nozzle, infrared heating plate, exhaust fan, and hydraulic cylinder inside the chamber, can simultaneously achieve multi-factor synergistic simulation of corrosive medium spraying, wet-dry cycle, and dynamic stress loading. The high-pressure atomizing nozzle can uniformly spray different types of corrosive media. The infrared heating plate and exhaust fan can quickly adjust the temperature and humidity inside the chamber, realizing the switching between high humidity and low humidity wet-dry cycle. The combination of hydraulic cylinder, force sensor, and loading head can apply stable axial pressure to the concrete sample, perfectly replicating the complex corrosion and load-bearing scenarios faced by concrete structures in actual engineering, effectively reducing the deviation between test results and actual service conditions, and significantly improving the reference value of test data.

[0013] 2. This utility model integrates an ultrasonic probe and a displacement controller via a fixed plate, along with a temperature and humidity sensor inside the chamber. This allows for multi-dimensional monitoring without damaging the concrete sample. The ultrasonic probe can detect the development of internal cracks in the sample in real time, the displacement controller can accurately record changes in the displacement of the loading head, and the temperature and humidity sensor can simultaneously collect environmental parameters inside the chamber. These three components work in conjunction with the controller to continuously track changes in the surface state, internal structure, and mechanical properties of the sample from the initial stage of corrosion to the later stage of damage. This solves the problem of traditional devices requiring sample destruction to obtain data, providing complete dynamic data support for the study of concrete corrosion resistance. At the same time, multiple control components enable precise parameter control. An ion concentration sensor monitors the concentration of corrosive media in the mixing tank in real time, a replenishment pump can automatically replenish the original solution based on the monitoring data to ensure stable media concentration, a flow regulating valve precisely controls the amount of sprayed media delivered, and a force sensor and hydraulic cylinder work together to achieve precise adjustment of the loading force, significantly improving test repeatability. On the other hand, a recovery tank collects the corrosive media discharged from the chamber through a return liquid pipeline, filters it through a filter pump, and then returns it to the mixing tank for recycling, reducing media waste, lowering test costs, and meeting energy-saving and environmental protection requirements. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the cabin of this utility model; Figure 3 This is a schematic diagram of the overall structure of the exhaust fan of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Chamber; 2. Raw material tank; 3. Mixing tank; 4. Recovery tank; 5. Support mesh plate; 6. Concrete sample; 7. Spray pipe; 8. High-pressure atomizing nozzle; 9. Hydraulic cylinder; 10. Force sensor; 11. Loading head; 12. Fixing plate; 13. Displacement controller; 14. Ultrasonic probe; 15. Infrared heating plate; 16. Exhaust fan; 17. Temperature and humidity sensor; 18. Sealing cover; 19. Vent valve; 20. First delivery pipeline; 21. Dosing pump; 22. Second delivery pipeline; 23. Delivery pump; 24. Flow regulating valve; 25. Return pipeline; 26. Solenoid valve; 27. Third delivery pipeline; 28. Filter pump; 29. ​​Ion concentration sensor; 30. Controller; 31. Touch screen. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete.

[0019] This utility model provides, for example Figure 1-3 An accelerated corrosion testing device for testing the erosion resistance of concrete is shown, comprising a chamber 1, a raw material tank 2, a mixing tank 3, and a recovery tank 4. A support mesh plate 5 is fixedly installed between the two sides inside the chamber 1. Multiple concrete samples 6 are placed on the top of the support mesh plate 5. A spray pipe 7 is fixedly installed on the top of the chamber 1. Multiple high-pressure atomizing nozzles 8 are fixedly installed at the bottom of each of the multiple spray pipes 7. Multiple hydraulic cylinders 9 are fixedly installed inside the chamber 1. Force sensors 10 are fixedly installed at the moving ends of each of the multiple hydraulic cylinders 9. Loading heads 11 are fixedly installed at the bottom of each of the multiple force sensors 10. Fixing plates 12 are fixedly installed on the surface of each of the multiple loading heads 11. Displacement controllers 13 and ultrasonic probes 14 are fixedly installed at the bottom of both sides of each of the multiple fixing plates 12. The device can simultaneously simulate the synergistic effects of corrosive media, wet-dry cycles, and dynamic stress.

[0020] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete. Infrared heating plates 15 are fixedly installed on both sides of the interior of the chamber 1. An exhaust fan 16 is provided through one side of the top of the chamber 1. A temperature and humidity sensor 17 is fixedly installed inside the chamber 1 to control the dry and wet circulation inside the chamber 1.

[0021] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete. The chamber 1 is provided with a raw liquid tank 2, a mixing tank 3 and a recovery tank 4 on one side. The top of the raw liquid tank 2, the mixing tank 3 and the recovery tank 4 are all provided with a sealing cover 18, and the top of each of the sealing covers 18 is provided with a vent valve 19.

[0022] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete. A first conveying pipe 20 is fixedly installed between the outlet of the raw liquid tank 2 and one side of the mixing tank 3. A dosing pump 21 is provided on the surface of the first conveying pipe 20. A second conveying pipe 22 is provided between the outlet of the mixing tank 3 and the inlet of the spray pipe 7. A conveying pump 23 and a flow regulating valve 24 are provided on the surface of the second conveying pipe 22.

[0023] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete. A return liquid pipe 25 is fixedly installed between the bottom of the recovery tank 4 and the chamber 1. A solenoid valve 26 is provided on the surface of the return liquid pipe 25. A third conveying pipe 27 is fixedly installed between the outlet of the recovery tank 4 and the inlet of the mixing tank 3. A filter pump 28 is provided on the surface of the third conveying pipe 27. An ion concentration sensor 29 is fixedly installed on the surface of the mixing tank 3.

[0024] This utility model discloses an accelerated corrosion testing device for testing the erosion resistance of concrete. The surface of the chamber 1 is provided with a controller 30, the surface of the controller 30 is provided with a touch screen 31, and the controller 30 is electrically connected to the interior of the chamber 1.

[0025] In use, first open the sealing caps 18 of the raw material tank 2 and the mixing tank 3, while keeping the sealing cap 18 of the recovery tank 4 closed. Balance the air pressure only through the vent valve 19. Inject a high-concentration corrosive medium raw material into the raw material tank 2 and water into the mixing tank 3. Set the test parameters via the touchscreen 31 of the controller 30, including the concentration of the corrosive medium, the spray volume, the temperature and humidity cycle within the chamber, the loading force of the hydraulic cylinder 9, and the test duration. Place the concrete sample 6 on the support mesh plate 5 inside the chamber 1, ensuring the sample position is aligned with the loading head 11 and the high-pressure atomizing nozzle 8. After starting the device, the delivery pump 23 delivers the mixture through the second delivery pipe 22. The corrosive medium inside tank 3 is transported to the spray pipe 7 at the top of chamber 1. After being atomized by high-pressure atomizing nozzle 8, it is evenly sprayed onto the surface of concrete sample 6, creating a corrosive environment. Simultaneously, hydraulic cylinder 9 is activated, and its moving end, carrying power sensor 10 and loading head 11, moves downward until loading head 11 contacts the top surface of concrete sample 6. Force sensor 10 monitors the loading force in real time. When the loading force reaches the set value, hydraulic cylinder 9 maintains pressure output to achieve dynamic stress loading. If dry-wet cycling is required, infrared heating plate 15 is activated to heat the chamber. Temperature and humidity sensor 17 collects the temperature and humidity inside the chamber in real time. When the humidity reaches above 90% and is maintained for a set time, exhaust fan 16 is activated to expel moisture from the chamber, reducing the humidity to 30%. The following steps are performed to maintain the set time, completing one wet-dry cycle. The cycle continues until the end of the test. During the test, the ultrasonic probe 14 continuously emits ultrasonic waves into the concrete sample 6. The reflected wave signal is processed by the controller 30 and the development of cracks inside the sample is displayed in real time. The displacement controller 13 synchronously records the displacement change of the loading head 11 to determine the deformation of the sample under the combined action of corrosion and stress. The temperature and humidity sensor 17 and the ion concentration sensor 29 transmit the environmental parameters inside the chamber and the medium concentration data of the mixing tank 3 to the controller 30, respectively. If the medium concentration in the mixing tank 3 is lower than the set value, the controller 30 automatically starts the replenishment pump 21 and transfers the original liquid from the tank 2 through the first delivery pipe 20. High-concentration stock solution is transported to mixing tank 3 until the medium concentration returns to the set value. Corrosive medium at the bottom of chamber 1 flows into recovery tank 4 through return pipe 25. When the medium in recovery tank 4 reaches a certain amount, filter pump 28 starts and the recovered medium is filtered and transported back to mixing tank 3 through third conveying pipe 27 to realize medium recycling. After the test reaches the set time, controller 30 automatically shuts down hydraulic cylinder 9, conveying pump 23, replenishing pump 21, filter pump 28, infrared heating plate 15 and exhaust fan 16. Test data can be viewed and exported through touch screen 31. Chamber 1 is opened and concrete sample 6 is taken out. The corrosion resistance performance of concrete is comprehensively evaluated by combining monitoring data with changes in the appearance and internal structure of the sample.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An accelerated corrosion testing device for testing the erosion resistance of concrete, comprising a chamber (1), a raw liquid tank (2), a mixing tank (3), and a recovery tank (4), characterized in that, A support mesh plate (5) is fixedly installed between the two sides inside the chamber (1). Multiple concrete samples (6) are placed on the top of the support mesh plate (5). A spray pipe (7) is fixedly installed on the top of the chamber (1). Multiple high-pressure atomizing nozzles (8) are fixedly installed at the bottom of the multiple spray pipes (7). Multiple hydraulic cylinders (9) are fixedly installed inside the chamber (1). Force sensors (10) are fixedly installed at the moving ends of the multiple hydraulic cylinders (9). Loading heads (11) are fixedly installed at the bottom of the multiple force sensors (10). Fixing plates (12) are fixedly installed on the surface of the multiple loading heads (11). Displacement controllers (13) and ultrasonic probes (14) are fixedly installed at the bottom of both sides of the multiple fixing plates (12).

2. The accelerated corrosion testing device for testing the erosion resistance of concrete according to claim 1, characterized in that, Infrared heating plates (15) are fixedly installed on both sides of the interior of the cabin (1), an exhaust fan (16) is provided through one side of the top of the cabin (1), and a temperature and humidity sensor (17) is fixedly installed inside the cabin (1).

3. The accelerated corrosion testing device for testing the erosion resistance of concrete according to claim 1, characterized in that, The container (1) is provided with a raw liquid tank (2), a mixing tank (3) and a recovery tank (4) on one side. The top of the raw liquid tank (2), the mixing tank (3) and the recovery tank (4) are all provided with a sealing cover (18), and the top of the multiple sealing covers (18) are provided with a vent valve (19).

4. The accelerated corrosion testing device for testing the erosion resistance of concrete according to claim 1, characterized in that, A first conveying pipe (20) is fixedly installed between the outlet of the raw liquid tank (2) and one side of the mixing tank (3). A replenishing pump (21) is provided on the surface of the first conveying pipe (20). A second conveying pipe (22) is provided between the outlet of the mixing tank (3) and the inlet of the spray pipe (7). A conveying pump (23) and a flow regulating valve (24) are provided on the surface of the second conveying pipe (22).

5. The accelerated corrosion testing device for testing the erosion resistance of concrete according to claim 1, characterized in that, A return pipe (25) is fixedly installed between the bottom of the recovery tank (4) and the chamber (1). A solenoid valve (26) is provided on the surface of the return pipe (25). A third conveying pipe (27) is fixedly installed between the outlet of the recovery tank (4) and the inlet of the mixing tank (3). A filter pump (28) is provided on the surface of the third conveying pipe (27). An ion concentration sensor (29) is fixedly installed on the surface of the mixing tank (3).

6. The accelerated corrosion testing device for testing the erosion resistance of concrete according to claim 1, characterized in that, The surface of the cabin (1) is provided with a controller (30), the surface of the controller (30) is provided with a touch screen (31), and the controller (30) is electrically connected to the interior of the cabin (1).

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