Multi-factor coupling environment simulation device for testing durability of concrete

Abstract

The invention discloses a multi-factor coupling environment simulation device for testing concrete durability, and belongs to the technical field of concrete durability detection. Comprising a device shell, a sliding partition plate is arranged in the device shell and divides the inner space of the device shell into an upper cavity and a lower cavity, a plurality of telescopic assemblies are arranged in the upper cavity, one ends of the telescopic assemblies are fixed to the sliding partition plate, and the other ends of the telescopic assemblies are fixed to the upper end of the device shell; an annular mounting plate is arranged at the upper part of the edge of the upper surface of the sliding partition plate, a temperature simulation assembly, a humidity simulation assembly and a weathering simulation assembly are arranged above the annular mounting plate, and a through hole for placing a concrete test piece is formed in the middle of the sliding partition plate. The technical scheme is used for solving the problems that the environmental factor simulation of a concrete durability device in the prior art is single, and the working scene of a concrete test piece cannot be simulated.

Description

Technical Field

[0001] This invention belongs to the field of concrete durability testing technology, specifically relating to a multi-factor coupled environment simulation device for testing concrete durability. Background Technology

[0002] Concrete durability refers to the ability of concrete to resist various destructive factors under actual service conditions and maintain its strength and appearance integrity over a long period. Concrete durability means that within its specified service life, under various environmental conditions, it can maintain its safety, normal use, and acceptable appearance without additional costly reinforcement. The environmental factors that affect concrete durability are mainly as follows: weathering, primarily including wet-dry and hot-cold cycles. In areas with large and rapid temperature and humidity fluctuations, coupled with other destructive factors such as salt, alkali, seawater, and freeze-thaw cycles, concrete durability is significantly affected, often accelerating its collapse; the effects of environmental water, including the leaching of fresh water and the erosion of saltwater and acidic water; and freeze-thaw cycles, the most common destructive factor, which is why freeze-thaw resistance is generally used to represent concrete durability. Freeze-thaw cycles generate internal stress in concrete, promoting crack development, structural loosening, and ultimately surface spalling or overall collapse.

[0003] Therefore, durability testing of concrete specimens is an indispensable step in the construction industry before construction. In order to facilitate simulation testing, many devices that simulate the working environment of concrete have emerged in the existing technology. The principle is to accelerate the creep (aging) of concrete specimens in the device, and then analyze their durability.

[0004] However, existing durability testing devices typically only detect and analyze the impact of a single environmental factor on concrete. To achieve durability testing of concrete under environmental influences, multiple devices are needed to conduct individual tests on multiple specimens, followed by analysis of the results. This approach results in large footprints, high manufacturing costs, and cumbersome testing procedures for multiple durability testing devices. Furthermore, existing devices often only simulate the impact of environmental factors on concrete durability, failing to differentiate and simulate the concrete's working conditions, leading to significant discrepancies between test results and actual applications. Summary of the Invention In view of this, the purpose of the present invention is to provide a multi-factor coupled environment simulation device for testing concrete durability, so as to solve the problem that the existing concrete durability devices simulate only one environmental factor and cannot simulate the working scenario of concrete specimens.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a multi-factor coupled environmental simulation device for testing concrete durability, comprising a device housing. Inside the housing is a sliding partition dividing the internal space into an upper chamber and a lower chamber. The upper chamber contains several telescopic components, one end of which is fixed to the sliding partition, and the other end to the upper end of the housing. An annular mounting plate is located on the upper edge of the upper surface of the sliding partition. Above the annular mounting plate are temperature simulation components, humidity simulation components, and weathering simulation components. A through hole for placing concrete specimens is located in the center of the sliding partition. The outer side of the through hole is provided with a clamping assembly for holding the concrete specimen. Several sets of sliding support assemblies are provided along the circumference of the sliding partition in the lower cavity. The sliding support assembly includes a slide rod, one end of which is fixed to the bottom surface of the device housing, and the other end of which is slidably connected to the sliding partition. A support spring is sleeved on the slide rod to support the sliding partition. The two ends of the support spring abut against the bottom surface of the sliding partition and the device housing, respectively. The lower cavity is also provided with an corrosive liquid to simulate the erosion of the concrete specimen. In the initial state, the sliding partition is located above the corrosive liquid.

[0006] Furthermore, the sliding partition is provided with several columns, the annular mounting plate is slidably connected to the columns, and the lower surface of the annular mounting plate is provided with several floats, one side of which is fixed to the annular mounting plate.

[0007] Furthermore, the clamping assembly includes a strip-shaped through groove circumferentially arranged outside the through hole. Each strip-shaped through groove has a slider. The upper end of each slider has a sliding plate. One end of the sliding plate facing the center of the sliding partition has an abutment plate fixed to the sliding plate. A sliding shaft is located below the strip-shaped through groove. Both ends of the sliding shaft are fixed to the lower surface of the sliding partition. The lower end of the slider is slidably connected to the sliding shaft. A slip ring is located below the end of the sliding shaft near the center of the sliding partition. A traction rope is located at the lower end of the slider. One end of the traction rope is fixed to the slider, and the other end passes through the slip ring and is located below the through hole. A support plate is located below the through hole. The other ends of several traction ropes are fixed to the support plate. A return spring is sleeved on the sliding shaft. One end of the return spring abuts against the slider, and the other end abuts against the end of the sliding shaft near the center of the sliding partition.

[0008] Furthermore, an isolation plate is provided on the lower surface of the sliding partition, one end of the isolation plate is fixed to the sliding partition, and the isolation plate covers the sliding component below the sliding partition inside.

[0009] Furthermore, the weathering simulation component includes several sets of vertical mounting plates evenly distributed in a ring on the ring mounting plate. One end of each vertical mounting plate is connected to the ring mounting plate. Several air outlet nozzles are evenly distributed along the length of each vertical mounting plate. Each air outlet nozzle is provided with an air inlet pipe. One end of the air inlet pipe is connected to the nozzle, and the other end of the air inlet pipe extends from the upper end of the device housing to the outside and is connected to a fan installed outside the device housing.

[0010] Furthermore, the temperature simulation component includes a heating component and a cooling component disposed on the intake pipe.

[0011] Furthermore, the humidity simulation component includes a water pump, a suction pipe, a drain pipe, and an atomizing nozzle. The water pump is fixed on an annular mounting plate. One end of the suction pipe is located in the lower corrosive liquid, and the other end of the suction pipe is connected to the suction end of the water pump. One end of the drain pipe is connected to the discharge end of the water pump, and the other end of the drain pipe is connected to the atomizing nozzle.

[0012] Furthermore, a clearance groove is provided at the connection between the annular mounting plate and the vertical mounting plate. The end of the vertical mounting plate is rotatably connected to the clearance groove. The vertical mounting plate rotates toward the center of the sliding partition. An inclined plate is provided at one end of the vertical mounting plate rotatably connected to the clearance groove. One end of the inclined plate is fixed to the end of the vertical mounting plate. A limiting retaining spring is provided on the surface of the other end of the inclined plate. One end of the limiting retaining spring is fixed to the annular mounting plate, and the other end is fixed to the inclined plate. The end of the inclined plate connected to the limiting retaining spring is located directly above the end of the slide rod.

[0013] The beneficial effects of this invention are as follows: (1) The sliding partition divides the device into two areas. The upper area is used to simulate the working environment of the concrete specimen in the air above the ground, and to simulate the environmental factors affecting the durability of the concrete in the working environment, so as to obtain the results and analysis of the influence of the environmental factors on the durability of the concrete specimen in the working scenario; the lower area is used to simulate the working environment of the concrete specimen at the interface between the liquid surface and the air, and to simulate the environmental factors affecting the durability of the concrete in the working environment, so as to obtain the results and analysis of the influence of the environmental factors on the durability of the concrete specimen in the working scenario; that is, in this technical solution, one device realizes the dual working scenarios and the environmental simulation in the dual working scenarios. (2) The temperature simulation component, humidity simulation component and weathering simulation component in this device can simulate the main environmental factors (weathering, temperature and humidity) and working scenarios that affect the durability of concrete specimens. At the same time, the setting of corrosive liquid can also simulate the corrosion and freeze-thaw conditions of concrete specimens. In other words, this device can simulate the environmental factors that affect the durability of concrete specimens very comprehensively and can basically meet the environmental simulation requirements of all working scenarios of concrete specimens. (3) The internal structure of the device is limited and locked by the self-weight of the concrete specimen. That is, the clamping component does not use electrical components. When it is submerged in the corrosive liquid, it is safer than the clamping of electrical components. There is no risk of short circuit, and no additional sealing is required.

[0014] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a perspective view of the multi-factor coupling environment simulation device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the multi-factor coupling environment simulation device of the present invention; Figure 3 This is a schematic diagram of the front view and cross-sectional view of the multi-factor coupling environment simulation device of the present invention; Figure 4 This is a three-dimensional internal schematic diagram of the multi-factor coupling environment simulation device of the present invention; Figure 5 This is an internal three-dimensional schematic diagram of the multi-factor coupling environment simulation device of the present invention from another perspective; Figure 6 For the present invention Figure 4 A magnified view of a portion of point A in the middle.

[0016] The following labels are shown in the attached diagram: 1. Casing of the device; 2. Sliding partition; 3. Fixed plate; 4. Telescopic assembly; 5. Sliding plate; 6. Abutment plate; 7. Strip groove; 8. Sliding block; 9. Sliding shaft; 10. Return spring; 11. Traction rope; 12. Support plate; 13. Isolation plate; 14. Annular mounting plate; 15. Vertical mounting plate; 16. Air outlet nozzle; 17. Inclined plate; 18. Limiting and retaining spring; 19. Sliding rod; 20. Supporting spring; 21. Clearance groove; 22. Float; 23. Column; 24. Concrete specimen. Detailed Implementation

[0017] like Figures 1-6 As shown, this invention discloses a multi-factor coupled environment simulation device for testing concrete durability, comprising a device shell 1. The device shell 1 can be understood as a columnar body formed by welding steel plates, or it can be an underground groove of a concrete component. Specifically, the device shell 1 is hollow inside, closed at the lower end, and has a fixed plate 3 welded to the outer edge of the upper end. The fixed plate 3 is used to install telescopic components 4. A sliding partition 2 is provided inside the device shell 1. The sliding partition 2 is preferably a circular steel plate. The sliding partition 2 divides the internal space of the device shell 1 into an upper chamber and a lower chamber. Several telescopic components 4 are provided in the upper chamber. In this specific embodiment, the telescopic components 4 can be existing technical components such as linear push rods. One end of the telescopic component 4 is fixed to the sliding partition 2, and the other end is fixed to the upper end of the device shell 1. An annular mounting plate 14 is provided on the upper edge of the upper surface of the sliding partition 2. The annular mounting plate 14 is also made of steel plate. Above the annular mounting plate 14 is a... The device includes temperature simulation components, humidity simulation components, and weathering simulation components. A through-hole for placing a concrete specimen 24 is provided in the middle of the sliding partition 2. The shape of the through-hole can be set according to the shape of the precast concrete specimen, and the through-hole should be larger than the cross-section of the concrete specimen 24 to allow for placement at different sizes. A clamping component for holding the concrete specimen 24 is provided outside the through-hole. Several sets of sliding support components are provided along the circumference of the sliding partition 2 in the lower chamber. The sliding support components include a sliding rod 19, one end of which is fixed to the bottom surface of the device housing 1, and the other end of which is slidably connected to the sliding partition 2. A support spring 20 is sleeved on the sliding rod 19 to support the sliding partition 2. Both ends of the support spring 20 abut against the bottom surfaces of the sliding partition 2 and the device housing 1, respectively. The lower chamber also contains an corrosive liquid to simulate the erosion of the concrete specimen 24. Initially, the sliding partition 2 is located above the corrosive liquid.

[0018] The working principle of the above technical solution is as follows: When the concrete specimen 24 to be simulated is used above the ground (concrete application scenario simulation), then it is only necessary to place the prepared concrete specimen 24 in the through hole of the sliding partition 2, and then clamp the position of the concrete specimen 24 by the clamping component to prevent the concrete specimen from tilting during the durability test. After clamping, the environmental factors in the upper chamber of the device shell 1 are changed by the temperature simulation component, humidity simulation component and weathering simulation component (environmental factor simulation), and then the durability of the concrete specimen 24 can be tested. Of course, it is easy to understand that during the test, corresponding sensors for data collection should be set inside the device shell 1 and on the concrete specimen 24, such as temperature sensors, humidity sensors and camera components. At the same time, crack detection sensors should be set on the concrete specimen 24. The specific sensor settings are common technical means for durability experiments in the prior art, and will not be elaborated in detail here. When the concrete specimen 24 to be simulated is used at the interface between air and liquid, such as a bridge pier in a river, the concrete specimen 24 is placed inside the outer casing 1 of the device and clamped. Then, the telescopic component 4 is activated, pushing the sliding partition 2 downwards. The sliding partition 2 then moves downwards, partially immersing the concrete specimen 24 in the corrosive liquid. The environmental factors in this scenario are then simulated using temperature, humidity, and weathering simulation components. It should be noted that the temperature simulation component can simulate temperatures above or below zero. Both working environments allow for freeze-thaw cycle simulation tests on concrete specimen 24. Furthermore, when concrete specimen 24 is located at the interface between air and liquid, lowering the temperature can perfectly replicate the working environment of concrete bridge piers in northern winters. This is because lowering the temperature can control the freezing of the corrosive liquid, such as complete freezing or freezing at the top while leaving the bottom unfrozen. Additionally, the wind blowing from the weathering components can cause the corrosive liquid to form flowing water or waves, further simulating the usage scenarios of concrete specimen 24 and the factors affecting its durability.

[0019] The function of the support spring 20 is to support the sliding partition 2, ensuring that the sliding partition 2 is located above the corrosive liquid under normal conditions. At the same time, it can also help the sliding partition 2 return to its initial position when the force of the telescopic component 4 is lost. The corrosive liquid can be river water, seawater, or other special liquids. It can be adjusted and replaced according to the actual situation. In order to facilitate the replacement, the lower part of the device housing 1 is provided with components such as water inlet and water outlet.

[0020] In one feasible method, the sliding partition 2 is provided with several columns 23, and the annular mounting plate 14 is slidably connected to the columns 23. The lower surface of the annular mounting plate 14 is provided with several floats 22, which can be foam blocks. One side of the floats 22 is fixed to the annular mounting plate 14. When the sliding partition 2 moves down, the foam blocks will float above the corrosive liquid, and the annular mounting plate 14 will not sink, thus increasing the distance between the annular mounting plate 14 and the corrosive liquid (without the floats, the end of the slide rod 19 will support the annular mounting plate 14, but when the liquid level of the corrosive liquid rises or wave motion occurs, the annular mounting plate 14 is easily submerged), ensuring that the electronic components such as the temperature simulation component, humidity simulation component, and weathering simulation component installed on it will not be soaked in water, thus ensuring their performance.

[0021] In one feasible embodiment, the clamping assembly includes a strip-shaped through groove 7 circumferentially arranged outside the through hole. Each strip-shaped through groove 7 is provided with a slider 8. The upper end of the slider 8 is provided with a sliding plate 5. The end of the sliding plate 5 facing the center of the sliding partition 2 is provided with an abutment plate 6, which is fixed to the sliding plate 5. A sliding shaft 9 is provided below the strip-shaped through groove 7. Both ends of the sliding shaft 9 are fixed to the lower surface of the sliding partition 2. The lower end of the slider 8 is slidably connected to the sliding shaft 9. A slip ring is provided below the end of the sliding shaft 9 near the middle of the sliding partition 2. A traction rope 11 is provided on the lower end of the slider 8. One end of the traction rope 11 is fixed to the slider 8. The other end of the traction rope 11 passes through the slip ring and is located below the through hole. A support plate 12 is provided below the through hole. The other ends of several traction ropes 11 are fixed to the support plate 12. A return spring 10 is sleeved on the sliding shaft 9. One end of the return spring 10 abuts against the slider 8, and the other end abuts against the end of the sliding shaft 9 near the middle of the sliding partition 2.

[0022] The working principle of the above-mentioned clamping assembly is as follows: In order to conduct durability tests on concrete specimens 24 of various sizes, the through-hole size of the sliding partition 2 is relatively large. If the size of the concrete specimen 24 is small, it is easy for the concrete specimen 24 to tip over under wind or vibration. Therefore, a clamping assembly is required. The working principle of the clamping assembly is as follows: When the concrete specimen 24 is placed on the support plate 12 through the through-hole of the sliding partition 2, under the action of the gravity of the concrete specimen 24, it will drive the traction rope 11 to move downward, thereby pulling the slider 8 to move. That is, the movement of the slider 8 will drive the end of the sliding plate 5 to move closer to the middle of the sliding partition 2, thereby realizing the contact plate 6 to contact the surface of the concrete specimen 24, thereby realizing the limiting and clamping of the concrete specimen 24. When the test is completed, it is only necessary to remove the concrete specimen 24. At this time, the support plate 12 loses its force, and under the action of the reset spring, the slider 8 will return to the initial position, thus facilitating the next test cycle.

[0023] In one feasible embodiment, a partition plate 13 is provided on the lower surface of the sliding partition 2. One end of the partition plate 13 is fixed to the sliding partition 2, and the partition plate 13 covers the sliding component below the sliding partition 2 inside. Under the action of the partition plate 13, the through hole of the sliding partition 2 and the gap of the corrosive liquid are sealed, so as to prevent the corrosive liquid in the lower part from changing the humidity range controlled by the humidity simulation component in the upper part under the action of vaporization. At the same time, it can also prevent some corrosive liquids from evaporating into the upper chamber in large quantities, which would lead to the corrosion of electronic components. Of course, it is easy to understand that in order to facilitate the downward movement of the sliding partition 2, the sliding partition 2 and the lower chamber are not completely sealed.

[0024] In one feasible implementation, the weathering simulation component includes several sets of vertical mounting plates 15 evenly distributed in a ring on an annular mounting plate 14. One end of each vertical mounting plate 15 is connected to the annular mounting plate 14. Several air outlet nozzles 16 are evenly distributed along the length of each vertical mounting plate 15. Each air outlet nozzle 16 is equipped with an air inlet pipe. One end of the air inlet pipe is connected to the nozzle, and the other end extends from the upper end of the device housing 1 to the outside and is connected to a fan installed outside the device housing 1. The fan delivers airflow from the air outlet nozzles 16, thereby simulating the weathering of the concrete specimen 24. The number and direction of airflow from the air outlet nozzles 16 can be controlled by opening and closing the air inlet pipe.

[0025] In one feasible embodiment, the temperature simulation component includes a heating component and a cooling component disposed on the air intake pipe. The heating component can be an electric heating wire component, and the cooling component can be a refrigeration device in the prior art, such as the refrigeration component in a refrigerator or air conditioner. In this specific embodiment, the air temperature is changed by heating or cooling the air intake pipe, thereby achieving temperature control. The air intake pipe is preferably a coil. The advantage of this arrangement is that by combining the weathering simulation component and the temperature simulation component, the pipe layout and device structure can be simplified.

[0026] In one feasible implementation, the humidity simulation component includes a water pump, a suction pipe, a drain pipe, and an atomizing nozzle. The water pump is fixed on an annular mounting plate 14. One end of the suction pipe is located in the lower corrosive liquid, and the other end of the suction pipe is connected to the suction end of the water pump. One end of the drain pipe is connected to the discharge end of the water pump, and the other end of the drain pipe is connected to the atomizing nozzle. The liquid is atomized by the atomizing nozzle, thereby changing the humidity. The working principle of the humidity simulation component is existing technology. As for this setting method, it is also based on local material selection and operation, and the device structure is simplified as much as possible.

[0027] In one feasible embodiment, a clearance groove 21 is provided at the connection between the annular mounting plate 14 and the vertical mounting plate 15. The end of the vertical mounting plate 15 is rotatably connected to the clearance groove 21 via a rotating shaft. The vertical mounting plate 15 rotates toward the center of the sliding partition 2. An inclined plate 17 is provided on one end of the vertical mounting plate 15 rotatably connected to the clearance groove 21. One end of the inclined plate 17 is fixed to the end of the vertical mounting plate 15. A limiting retaining spring 18 is provided on the surface of the other end of the inclined plate 17. One end of the limiting retaining spring 18 is fixed to the annular mounting plate 14, and the other end is fixed to the inclined plate 17. The end of the inclined plate 17 connected to the limiting retaining spring 18 is located directly above the end of the slide rod 19.

[0028] Under normal conditions, the vertical mounting plate remains vertical under the action of the limiting spring 18, allowing the air nozzle 16 to better act on the concrete specimen 24. When the sliding partition 2 moves downward, and in order to simulate the cooling of the corrosive liquid, the low-temperature air sprayed by the air nozzle 16 needs to be blown directly onto the corrosive liquid to accelerate its freezing or cooling. Therefore, when the sliding partition 2 moves downward, one end of the inclined plate 17 contacts the end of the slide rod 19. Under the action of the gravity of the annular mounting plate 14, the inclined plate 17 will tilt to its limit position, that is, the upper end of the inclined plate 17 will rotate towards the middle of the sliding partition 2. This means that the air outlet direction of the air nozzle 16 will tilt downward, directly blowing onto the corrosive liquid, thereby reducing the cooling and freezing rate of the corrosive liquid and improving the detection rate. Of course, after the sliding partition 2 moves upward, the limiting spring 18 will reset, which will drive the vertical mounting plate 15 to reset. It should be noted that although the air blowing direction of the air outlet nozzle 16 is tilted at this time, it can still simulate changes in ambient temperature factors and weathering simulation. At the same time, if this function is not needed, it is only necessary to increase the thickness of the float 22, so that the downward movement of the annular mounting plate 14 will be relatively small, thus preventing the slide bar 19 from contacting the tilting plate 17. Alternatively, a crossbar can be added to abut against the vertically mounted plate 15, thereby limiting its rotation.

[0029] It should be noted that in this specific embodiment, there are 4 vertical mounting plates 15, 4 sliding plates 5, 4 sliding rods 19, and 4 telescopic components 4. Of course, the specific number can be selected according to the actual situation.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A multi-factor coupled environmental simulation device for testing the durability of concrete, characterized by: The utility model provides a concrete weathering simulation device, including device shell, the inside of device shell is equipped with sliding partition, sliding partition divides the inside space of device shell into upper chamber and lower chamber, be equipped with a plurality of telescopic components in upper chamber, one end of telescopic component is fixed on sliding partition, the other end is fixed on the upper end of device shell, the upper portion of the upper surface edge of sliding partition is equipped with ring mounting plate, the upper side of ring mounting plate is equipped with temperature simulation assembly, humidity simulation assembly and weathering simulation assembly, the middle part of sliding partition is equipped with the through -hole of placing concrete test piece, the outside of through -hole is equipped with the clamping assembly of clamping concrete test piece, the lower chamber is equipped with a plurality of groups of sliding support components along the circumferential direction of sliding partition, sliding support component includes slide rod, one end of slide rod is fixed on the bottom surface of device shell, the other end of slide rod is connected with sliding partition, the support spring of supporting sliding partition is sleeved on the slide rod, and the both ends of support spring are respectively abutted with sliding partition and the bottom surface of device shell, the lower chamber is also equipped with erosion liquid for simulating concrete test piece is eroded, and in the initial state, sliding partition is located above erosion liquid.

2. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 1, characterized in that: The sliding partition is provided with a plurality of vertical columns, the ring mounting plate is slidably connected to the vertical columns, and the lower surface of the ring mounting plate is provided with a plurality of floating blocks, one side surface of the floating blocks is fixed to the ring mounting plate.

3. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 1, characterized in that: The clamping assembly includes a strip-shaped through slot circumferentially arranged outside the through hole, a sliding block is arranged in the strip-shaped through slot, the upper end of the sliding block is provided with a sliding plate, one end of the sliding plate towards the center of the sliding partition is provided with an abutting plate, the abutting plate is fixed to the sliding plate, a sliding shaft is arranged below the strip-shaped through slot, the both ends of the sliding shaft are fixed to the lower surface of the sliding partition, the lower end of the sliding block is slidably connected to the sliding shaft, a sliding ring is arranged below one end of the sliding shaft close to the middle of the sliding partition, the lower end of the sliding block is provided with a traction rope, one end of the traction rope is fixed to the sliding block, the other end of the traction rope passes through the sliding ring and is located below the through hole, a supporting plate is arranged below the through hole, the other ends of the plurality of traction ropes are fixed to the supporting plate, a return spring is sleeved on the sliding shaft, one end of the return spring abuts against the sliding block, and the other end of the return spring abuts against one end of the sliding shaft close to the middle of the sliding partition.

4. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 3, characterized in that: The lower surface of the sliding partition is provided with an isolation plate, one end of the isolation plate is fixed to the sliding partition, and the isolation plate covers the sliding assembly below the sliding partition.

5. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 1, wherein: The weathering simulation assembly includes a plurality of sets of vertical mounting plates arranged in a ring on the ring mounting plate, one end of the vertical mounting plate is connected to the ring mounting plate, a plurality of air outlet nozzles are uniformly arranged along the length direction of the vertical mounting plate, an air inlet pipe is arranged on the air outlet nozzle, one end of the air inlet pipe is connected to the nozzle, the other end of the air inlet pipe extends to the outside from the upper end of the device shell, and the air inlet pipe is connected to the fan arranged outside the device shell.

6. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 5, wherein: The temperature simulation assembly includes a heating assembly and a refrigeration assembly arranged on the air inlet pipe.

7. The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 1, wherein: The humidity simulation assembly comprises a water pump, a water suction pipe, a water discharge pipe and an atomizing nozzle, the water pump is fixed on the annular mounting plate, one end of the water suction pipe is located in the lower erosion liquid, the other end of the water suction pipe is connected with the water suction end of the water pump, one end of the water discharge pipe is connected with the water discharge end of the water pump, and the other end of the water discharge pipe is connected with the atomizing nozzle. 8.The multi-factor coupled environmental simulation device for testing the durability of concrete according to claim 5, wherein: The annular mounting plate is provided with an avoiding slot at the position connected with the vertical mounting plate, the end of the vertical mounting plate is rotationally connected in the avoiding slot, the vertical mounting plate rotates towards the center of the sliding partition plate, the end of the vertical mounting plate rotationally connected in the avoiding slot is provided with an inclined plate, one end of the inclined plate is fixed on the end of the vertical mounting plate, the other end surface of the inclined plate is provided with a limit retaining spring, one end of the limit retaining spring is fixed on the annular mounting plate, and the other end is fixed on the inclined plate, and the end of the inclined plate connected with the limit retaining spring is located directly above the end of the sliding rod.

Images