Weather resistance test equipment for bridge material and multi-environment coupling aging test method

Abstract

The invention relates to the technical field of bridge material testing, in particular to bridge material weather resistance testing equipment and a multi-environment coupling aging test method. The device comprises a sample setting table, and a rotary table and a driving body which are arranged above the sample setting table. According to the device, after a bridge material sample is placed on the sample arrangement table, the weathering structure continuously blows air to the bridge material sample for weathering, the illumination structure continuously irradiates the bridge material sample for illumination aging, and in the process, the driving body drives the sealing cover to continuously rotate; the wind blowing angle of the weathering structure to the bridge material sample is adjusted, the driving body drives the illumination structure to periodically swing at the same time, and the illumination angle of the illumination structure to the bridge material sample is adjusted, so that the conditions of actual wind direction change and sun illumination angle change are fitted, and the result of the multi-environment coupling aging test is more accurate.

Description

Technical Field

[0001] This invention relates to the field of bridge material testing technology, and more specifically, to weather resistance testing equipment and multi-environment coupled aging test method for bridge materials. Background Technology

[0002] Bridge materials refer to the various materials used in the construction of bridges, mainly including concrete, coatings, and metal components such as steel. Bridge materials are an important part of bridge construction, and the rational selection and use of materials can effectively improve the quality and lifespan of bridges.

[0003] Before bridge construction, in order to assess the stability and reliability of bridge materials under different environmental conditions and ensure the safety and service life of the bridge, it is necessary to conduct multi-environment coupled aging tests on the bridge materials. (Multi-environment coupled aging tests refer to a method of aging tests on materials or products under the combined action of different environmental factors. This test aims to simulate the comprehensive influence of multiple environmental factors in the actual use environment and evaluate the durability and reliability of materials or products.) For example, CN1416524A involves an ultra-accelerated natural sunlight exposure test device that can test the light resistance performance of materials. The problem is that, in addition to being exposed to sunlight, bridge materials will also encounter weathering problems during use. Therefore, the above-mentioned device cannot conduct a comprehensive aging test on bridge materials, and the test results are not ideal. Summary of the Invention

[0004] The purpose of this invention is to provide an aging test device that can simultaneously expose bridge materials to light and weathering, so as to achieve comprehensive testing of bridge materials.

[0005] The purpose of this invention is to provide weather resistance testing equipment and multi-environment coupled aging test method for bridge materials. By adjusting the wind angle and the light angle, the multi-environment coupled aging test of bridge materials through light and weathering can be realized.

[0006] To achieve the above objectives, one objective of the present invention is to provide a weather resistance testing device for bridge materials, including a sample setting platform and a turntable and a drive body disposed above the sample setting platform; The sample setting table is used to place bridge material samples; The turntable includes a closed cover located above the sample setting stage, and a weathering structure and a lighting structure set on the closed cover. The bottom end of the closed cover is rotatably connected to the sample setting stage. The weathering structure is used to weather the bridge material sample, and the lighting structure is used to illuminate the bridge material sample. The drive body is set on the closed cover and meshes with the sample setting stage to drive the closed cover to rotate and adjust the blowing angle of the weathering structure towards the bridge material sample. The drive body is also connected to the lighting structure to drive the lighting structure to swing and adjust the lighting angle of the lighting structure towards the bridge material sample.

[0007] The driving body drives the closed cover to rotate continuously, adjusting the blowing angle of the weathered structure on the bridge material sample. At the same time, the driving body drives the illumination structure to oscillate periodically, adjusting the illumination angle of the illumination structure on the bridge material sample.

[0008] As a further improvement to this technical solution, the sample setting platform includes a chassis and a plurality of symmetrically arranged feet at the bottom of the chassis. A sample placement tray for placing bridge material samples is inserted and fitted into the center of the chassis, and the side wall of the sample placement tray is threadedly connected to the inner wall of the feet.

[0009] Furthermore, the top edge of the sample placement tray is provided with a protrusion for holding the bridge material sample in place. By setting the protrusion to hold the edge of the bridge material sample in place, the bridge sample material will not fall off the top of the sample placement tray during installation or weathering.

[0010] As a further improvement to this technical solution, the surface of the enclosure is embedded with transparent glass for observing the bridge sample material inside the enclosure, and the side wall of the enclosure is provided with an air vent. The weathering structure includes a first fan installed in the air vent. The first fan is used to drive the air outside the enclosure to move towards the bridge material sample to simulate the air flow in the actual use environment. A second fan is provided on the side wall of the enclosure opposite to the first fan to guide the air inside the enclosure to flow outward.

[0011] The inner wall of the top of the chassis is provided with an inner guide rail, and the outer periphery of the side wall of the enclosure is provided with an edge rail groove. The edge rail groove is rotatably connected to the inner guide rail. The outer surface of the enclosure is also provided with a first outer extension plate and a second outer extension plate. The driving body includes a motor provided on the first outer extension plate and a drive shaft connected to the motor. The bottom end of the drive shaft passes through the second outer extension plate and is connected to a gear. Several teeth are provided on the outer periphery of the chassis. The drive shaft meshes with the chassis through the provided gear.

[0012] When the motor drives the drive shaft to rotate, it can cause the enclosure to rotate relative to the chassis, causing the angle of airflow over the bridge material sample to change, thereby simulating the changing wind direction in the actual use environment.

[0013] As a further improvement to this technical solution, the weathering structure also includes an annular water tank fitted onto a closed cover. The first fan includes a frame-shaped body and multiple fans disposed within the frame-shaped body. The frame-shaped body is fitted into the air vent. Multiple partitions are provided on both sides of the frame-shaped body. Capillary cavities are opened within the frame-shaped body and the partitions. The capillary cavities are connected to the bottom of the annular water tank. Water from the annular water tank flows out through the capillary cavities and comes into contact with the air, dispersing into the air and increasing the humidity of the air.

[0014] As a further improvement to this technical solution, the illumination structure includes a cantilever located inside a closed enclosure, with end shafts at both ends of the bottom of the cantilever, the end shafts being rotatably connected to the inner wall of the closed enclosure, an illumination head located in the middle of the cantilever, and multiple xenon lamps located at the bottom of the illumination head.

[0015] Furthermore, the first extension plate has a movable groove, and the end shaft of the cantilever near the drive shaft is provided with a swing shaft. The drive body also includes a swing structure disposed in the movable groove. The swing structure includes a first sliding plate and a second sliding plate. The first sliding plate is horizontally slidably connected to the inner wall of the movable groove, and the second sliding plate is vertically slidably connected to the inner wall of the movable groove. The surface of the first sliding plate near the end shaft has a first plate groove. The swing shaft is slidably connected to the first sliding plate, and the first sliding plate is slidably connected to the second sliding plate. The other side of the second sliding plate is provided with an end sleeve. One end of the drive shaft passes through the end sleeve, and the end sleeve is connected to the reciprocating lead screw on the surface of the drive shaft.

[0016] The cantilever drives the xenon lamp to swing periodically within the enclosed enclosure, adjusting the light intensity of the xenon lamp on the bridge material sample to simulate the angle changes of sunlight in the actual use environment.

[0017] The second objective of this invention is to provide a weathering resistance testing device and a reverse multi-environment coupled aging test method using the aforementioned bridge materials, comprising the following steps: S1. Place the bridge material sample on the top of the sample placement tray, then connect the sample placement tray to the inner wall of the tray foot from bottom to top with threads, and then rotate the sample placement tray. The bridge material sample at the top of the sample placement tray passes through the base plate and stops in the space formed by the base plate and the enclosure. S2. The first fan drives the air outside the sealed cover to blow air onto the bridge material sample for weathering, and the xenon lamp continuously irradiates the bridge material sample for photoaging. S3. The motor drives the drive shaft to rotate, which in turn causes the enclosure to rotate relative to the chassis, changing the angle at which the airflow passes through the bridge material sample. At the same time, the drive shaft drives the cantilever, which in turn causes the xenon lamp to oscillate periodically inside the enclosure. S4. Observe the bridge material samples through transparent glass and evaluate the durability and reliability of the bridge material samples.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the weathering resistance testing equipment and multi-environment coupled aging test method for bridge materials, after the bridge material sample is placed on the sample setting platform, the weathering structure continuously blows air onto the bridge material sample to weather it, and the illumination structure continuously irradiates the bridge material sample to age it by light. During this process, the driving body drives the closed cover to rotate continuously, adjusting the blowing angle of the weathering structure onto the bridge material sample. At the same time, the driving body drives the illumination structure to oscillate periodically, adjusting the illumination angle of the illumination structure onto the bridge material sample. This makes the test results of the multi-environment coupled aging test more accurate, as it closely matches the actual changes in wind direction and solar irradiation angle.

[0019] 2. In the weathering resistance testing equipment and multi-environment coupled aging test method of the bridge material, during the process of the fan continuously introducing external air into the closed hood, the water in the annular water tank flows out from the capillary cavity and comes into contact with the air, disperses into the air, increases the humidity of the air, and fits the humid air, thereby further simulating the air flow in the actual use environment and improving the weathering effect on the bridge material sample. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the sample setting stage of the present invention; Figure 3 This is a schematic diagram of the cooperation between the sample setting stage and the turntable structure of the present invention; Figure 4 This is a schematic cross-sectional view of the part where the enclosure and the weathering structure of the present invention are combined; Figure 5 This is a cross-sectional view of the first fan structure of the present invention; Figure 6 This is a schematic cross-sectional view of the part where the enclosure and the illumination structure of the present invention are combined; Figure 7 This is a schematic diagram showing the assembly of the sample setting stage, turntable, and drive body structure of the present invention. Figure 8 This is a schematic diagram of the cantilever and swing structure of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the cantilever and swing structure of the present invention. Figure 2 ; Figure 10 This is a schematic diagram of the oscillating illumination structure of the present invention.

[0021] The meanings of the labels in the diagram are as follows: 1. Sample setting platform; 11. Base; 12. Tray feet; 13. Sample placement tray; 14. Inner guide rail; 2. Turntable; 21. Enclosed enclosure; 211. Transparent glass; 212. Edge rail groove; 213. Air outlet; 214. First extension plate; 2141. Movable groove; 215. Second extension plate; 22. Weathering structure; 221. First fan; 2211. Fan; 2212. Partition; 2213. Capillary cavity; 222. Second fan; 223. Annular water tank; 23. Illumination structure; 231. Cantilever; 232. End shaft; 2321. Swing shaft; 233. Illumination head; 234. Xenon lamp; 3. Drive body; 31. Motor; 32. Drive shaft; 33. Swing structure; 331. First sliding plate; 332. Second sliding plate; 333. End sleeve. Detailed Implementation

[0022] The technical solutions in 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.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please see Figure 1 , Figure 3 As shown, one of the objectives of this embodiment is to provide a weather resistance testing device for bridge materials, including a sample setting platform 1 and a turntable 2 and a drive body 3 set above the sample setting platform 1. Sample setting platform 1 is used to place bridge material samples; The turntable 2 includes a closed cover 21 located above the sample setting stage 1, and a weathering structure 22 and an illumination structure 23 disposed on the closed cover 21. The bottom end of the closed cover 21 is rotatably connected to the sample setting stage 1. The weathering structure 22 is used to weather the bridge material sample, and the illumination structure 23 is used to illuminate the bridge material sample. The drive body 3 is disposed on the closed cover 21. The drive body 3 meshes with the sample setting stage 1 to drive the closed cover 21 to rotate and adjust the blowing angle of the weathering structure 22 toward the bridge material sample. The drive body 3 is also connected to the illumination structure 23 to drive the illumination structure 23 to swing so as to adjust the illumination angle of the illumination structure 23 toward the bridge material sample.

[0026] That is, after the bridge material sample is placed on the sample setting platform 1, the weathering structure 22 continuously blows air onto the bridge material sample to weather it, and the light irradiation structure 23 continuously irradiates the bridge material sample to age it by light. During this process, the driving body 3 drives the closed cover 21 to rotate continuously, adjusting the blowing angle of the weathering structure 22 onto the bridge material sample. At the same time, the driving body 3 drives the light irradiation structure 23 to swing periodically, adjusting the light irradiation angle of the light irradiation structure 23 onto the bridge material sample. This makes the results of the multi-environment coupled aging test more accurate, as it closely matches the actual changes in wind direction and the angle of solar irradiation.

[0027] The above structure is disclosed below: First, to facilitate the placement of bridge material samples, such as Figure 1 , Figure 2 As shown, the sample setting platform 1 includes a base 11 and a plurality of symmetrical feet 12 arranged at the bottom of the base 11. A sample placement tray 13 for placing bridge material samples is inserted and fitted in the middle of the base 11. The side wall of the sample placement tray 13 and the inner wall of the feet 12 are both provided with threads. The side wall of the sample placement tray 13 is threadedly connected to the inner wall of the feet 12. The top edge of the sample placement tray 13 is provided with a protrusion for holding the bridge material sample. By providing a protrusion to hold the edge of the bridge material sample, the bridge sample material will not fall off the top of the sample placement tray 13 when the sample placement tray 13 is installed or when it is weathered.

[0028] By placing the bridge material sample on top of the sample placement tray 13, and then connecting the sample placement tray 13 to the inner wall of the tray foot 12 from bottom to top with threads, and then rotating the sample placement tray 13, the sample placement tray 13 moves upward along the inner wall threads of the tray foot 12. The bridge material sample at the top of the sample placement tray 13 passes upward through the base plate 11 and stops in the space formed by the base plate 11 and the enclosure 21, thus completing the placement of the bridge material sample.

[0029] After placing the bridge material samples, a multi-environment coupled aging test needs to be conducted. In this invention, the aging test principle is to evaluate the durability and reliability of the bridge material samples by simulating the combined effects of airflow and sunlight in the actual use environment. The method for simulating airflow is as follows: Figure 3 , Figure 4 As shown, the surface of the enclosure 21 is embedded with transparent glass 211 for observing the bridge sample material inside the enclosure 21. The side wall of the enclosure 21 has an air vent 213. The weathering structure 22 includes a first fan 221 disposed in the air vent 213. The first fan 221 is used to drive the air outside the enclosure 21 to move towards the bridge material sample to simulate the air flow in the actual use environment. A second fan 222 is disposed on the side wall of the enclosure 21 opposite to the first fan 221 to guide the air inside the enclosure 21 to flow outward. By setting the second fan 222, the airflow inside the enclosure 21 can be sorted, so that the airflow can be discharged from the enclosure 21 through the second fan 222, avoiding the impact of the weathering effect on the bridge material sample due to the turbulent airflow inside the enclosure 21. In addition, due to the setting of the second fan 222, an airflow is formed inside the enclosure 21 from the first fan 221 to the second fan 222, passing through the bridge material sample, thereby ensuring the weathering effect on the bridge material sample.

[0030] Considering that wind direction changes in actual use environments, therefore, Figure 3 , Figure 7 As shown, an inner guide rail 14 is provided on the inner wall of the top of the chassis 11, and an edge rail groove 212 is provided on the outer periphery of the side wall of the enclosure 21. The edge rail groove 212 is rotatably connected to the inner guide rail 14. A first outer extension plate 214 and a second outer extension plate 215 are also provided on the outer surface of the enclosure 21. The driving body 3 includes a motor 31 provided on the first outer extension plate 214 and a drive shaft 32 that is connected to the motor 31. The bottom end of the drive shaft 32 passes through the second outer extension plate 215 and is connected to a gear. Several teeth are provided on the outer periphery of the chassis 11. The drive shaft 32 meshes with the chassis 11 through the gear. When the motor 31 drives the drive shaft 32 to rotate, it can drive the enclosure 21 to rotate relative to the chassis 11. Since the bridge material sample is placed on the top of the sample placement tray 13, the bridge material sample remains fixed when the enclosure 21 rotates, so that the angle of the airflow passing through the bridge material sample changes, thereby simulating the changing wind direction in the actual use environment.

[0031] Furthermore, such as Figure 3 , Figure 4 , Figure 5As shown, the weathering structure 22 also includes an annular water tank 223 fitted onto the enclosed cover 21. The first fan 221 includes a frame-shaped body and multiple fans 2211 disposed within the frame-shaped body. The frame-shaped body is fitted into the air vent 213. Multiple partitions 2212 are disposed on both sides of the frame-shaped body. Capillary cavities 2213 are opened in the frame-shaped body and the partitions 2212. The capillary cavities 2213 are connected to the bottom of the annular water tank 223. As the fans 2211 continuously introduce external air into the enclosed cover 21, the water in the annular water tank 223 flows out from the capillary cavities 2213 and comes into contact with the air, dispersing into the air, increasing the humidity of the air, and conforming to the humid air, thereby further simulating the air flow in the actual use environment and improving the weathering effect on the bridge material sample.

[0032] When weathering bridge material samples, light aging tests are also conducted on the bridge sample materials, such as... Figure 6 , Figure 8 , Figure 9As shown, the illumination structure 23 includes a cantilever 231 located inside the enclosed cover 21. End shafts 232 are provided at both ends of the bottom of the cantilever 231, and the end shafts 232 are rotatably connected to the inner wall of the enclosed cover 21. A light head 233 is provided in the middle of the cantilever 231, and multiple xenon lamps 234 are provided at the bottom of the light head 233. Furthermore, the first outer extension plate 214 has a movable groove 2141. A swing shaft 232 is provided on the end shaft 232 of the cantilever 231 near the drive shaft 32. The drive body 3 also includes a component disposed in the movable groove 2141. The swing structure 33 within 141 includes a first sliding plate 331 and a second sliding plate 332. The first sliding plate 331 is horizontally slidably connected to the inner wall of the movable groove 2141, and the second sliding plate 332 is vertically slidably connected to the inner wall of the movable groove 2141. A first plate groove is formed on the surface of the first sliding plate 331 near the end shaft 232. The swing shaft 2321 is located in the first plate groove and slidably connected to the first sliding plate 331. The surface of the first sliding plate 331 near the second sliding plate 332... A plate shaft is provided, and a second plate groove is correspondingly formed on the surface of the second sliding plate 332 near the first sliding plate 331. The plate shaft is located in the second plate groove. The first sliding plate 331 and the second sliding plate 332 are slidably connected by the plate shaft and the second plate groove. An end sleeve 333 is provided on the other side of the second sliding plate 332. One end of the drive shaft 32 passes through the end sleeve 333, and the end sleeve 333 is connected to the reciprocating lead screw on the surface of the drive shaft 32. A xenon lamp 234 is provided to perform photoaging on the bridge material sample. When shaft 32 drives the enclosed cover 21 to rotate and change the wind direction, drive shaft 32 can drive the second sliding plate 332 to slide up and down along the movable groove 2141 through end sleeve 333. When end sleeve 333 moves up and down, end sleeve 333 drives plate shaft through the second plate groove, thereby driving the first sliding plate 331 to slide left and right along the inner wall of movable groove 2141. Since the swing shaft 2321 of end shaft 232 is located in the first plate groove, when the first sliding plate 331 slides left and right, it will drive end shaft 232 to rotate, thus... Figure 10 As shown, the cantilever 231 then drives the xenon lamp 234 to swing periodically within the enclosure 21, adjusting the light intensity of the xenon lamp 234 on the bridge material sample, simulating the angle change of sunlight in the actual use environment.

[0033] The second objective of this embodiment is to provide a method for conducting multi-environment coupled aging tests using the aforementioned bridge material weathering resistance testing equipment. The specific steps are as follows: S1. Place the bridge material sample on the top of the sample placement tray 13, then connect the sample placement tray 13 to the inner wall of the tray foot 12 from bottom to top with threads, and then rotate the sample placement tray 13 so that the sample placement tray 13 moves upward along the inner wall of the tray foot 12. The bridge material sample at the top of the sample placement tray 13 passes through the base plate 11 and stops in the space formed by the base plate 11 and the enclosure 21, thus completing the placement of the bridge material sample. S2. The first fan 221 drives the outside air of the closed cover 21 to blow air onto the bridge material sample for weathering, and the xenon lamp 234 continuously irradiates the bridge material sample for photoaging. S3. The motor 31 drives the drive shaft 32 to rotate, which in turn causes the enclosure 21 to rotate relative to the chassis 11, changing the angle of the airflow over the bridge material sample. At the same time, the drive shaft 32 drives the cantilever 231, which in turn causes the xenon lamp 234 to swing periodically inside the enclosure 21. S4. Observe the bridge material sample through the transparent glass 211 and evaluate the durability and reliability of the bridge material sample.

[0034] 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 preferred examples and are not intended to limit 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A weathering resistance testing device for bridge materials, characterized in that: It includes a sample setting stage (1) and a turntable (2) and a drive body (3) set above the sample setting stage (1); The sample setting table (1) is used to place bridge material samples; The turntable (2) includes a closed cover (21) located above the sample setting platform (1) and a weathering structure (22) and a lighting structure (23) set on the closed cover (21). The bottom end of the closed cover (21) is rotatably connected to the sample setting platform (1). The weathering structure (22) is used to weather the bridge material sample, and the lighting structure (23) is used to illuminate the bridge material sample. The drive body (3) is set on the closed cover (21). The drive body (3) meshes with the sample setting platform (1) to drive the closed cover (21) to rotate. The drive body (3) is also connected to the lighting structure (23) to drive the lighting structure (23) to swing. The drive body (3) drives the closed cover (21) to rotate continuously, adjusting the blowing angle of the weathering structure (22) on the bridge material sample. At the same time, the drive body (3) drives the lighting structure (23) to swing periodically, adjusting the lighting angle of the lighting structure (23) on the bridge material sample.

2. The weathering resistance testing equipment for bridge materials according to claim 1, characterized in that: The sample setting platform (1) includes a base (11) and a plurality of symmetrically arranged feet (12) at the bottom of the base (11). A sample placement tray (13) for placing bridge material samples is inserted and fitted in the middle of the base (11). The side wall of the sample placement tray (13) is threadedly connected to the inner wall of the feet (12).

3. The weathering resistance testing equipment for bridge materials according to claim 2, characterized in that: The top edge of the sample placement tray (13) is provided with a protrusion for holding the bridge material sample.

4. The weathering resistance testing equipment for bridge materials according to claim 2, characterized in that: The surface of the enclosure (21) is embedded with transparent glass (211) for observing the bridge sample material. The side wall of the enclosure (21) is provided with an air vent (213). The weathering structure (22) includes a first fan (221) set in the air vent (213). The first fan (221) is used to drive the air outside the enclosure (21) to move towards the bridge material sample.

5. The weathering resistance testing equipment for bridge materials according to claim 4, characterized in that: A second fan (222) is provided on the side wall of the enclosure (21) opposite to the first fan (221) to guide the air inside the enclosure (21) to flow outward.

6. The weathering resistance testing equipment for bridge materials according to claim 4, characterized in that: The inner wall of the top of the chassis (11) is provided with an inner guide rail (14), and the outer periphery of the side wall of the enclosure (21) is provided with an edge rail groove (212). The edge rail groove (212) is rotatably connected to the inner guide rail (14). The outer surface of the enclosure (21) is also provided with a first extension plate (214) and a second extension plate (215). The drive body (3) includes a motor (31) provided on the first extension plate (214) and a drive shaft (32) connected to the motor (31). The bottom end of the drive shaft (32) passes through the second extension plate (215) and is connected with a gear. The outer periphery of the chassis (11) is provided with several teeth. The drive shaft (32) meshes with the chassis (11) through the provided gear.

7. The weathering resistance testing equipment for bridge materials according to claim 4, characterized in that: The weathering structure (22) also includes an annular water tank (223) fitted on the closed cover (21). The first fan (221) includes a frame-shaped body and multiple fans (2211) set inside the frame-shaped body. The frame-shaped body is stuck in the air outlet (213). Multiple partitions (2212) are set on both sides of the frame-shaped body. Capillary cavities (2213) are opened in the frame-shaped body and the partitions (2212). The capillary cavities (2213) are connected to the bottom of the annular water tank (223).

8. The weathering resistance testing equipment for bridge materials according to claim 6, characterized in that: The illumination structure (23) includes a cantilever (231) located inside the enclosure (21). The bottom ends of the cantilever (231) are provided with end shafts (232), which are rotatably connected to the inner wall of the enclosure (21). An illumination head (233) is provided in the middle of the cantilever (231), and multiple xenon lamps (234) are provided at the bottom of the illumination head (233).

9. The weathering resistance testing equipment for bridge materials according to claim 8, characterized in that: The first extension plate (214) has an active groove (2141). The end shaft (232) of the cantilever (231) near the drive shaft (32) is provided with a swing shaft (2321). The drive body (3) also includes a swing structure (33) provided in the active groove (2141). The swing structure (33) includes a first sliding plate (331) and a second sliding plate (332). The first sliding plate (331) is horizontally slidably connected to the inner wall of the active groove (2141). The second sliding plate (332) is vertically slidably connected to the inner wall of the active groove (2141). The swing shaft (2321) is slidably connected to the first sliding plate (331). The first sliding plate (331) is slidably connected to the second sliding plate (332). The other side of the second sliding plate (332) is provided with an end sleeve (333). One end of the drive shaft (32) passes through the end sleeve (333). The end sleeve (333) is connected to the reciprocating screw on the surface of the drive shaft (32).

10. A method for conducting multi-environment coupled aging tests using the weathering resistance testing equipment for bridge materials according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the bridge material sample on the top of the sample placement tray (13), then connect the sample placement tray (13) to the inner wall of the tray foot (12) from bottom to top with a thread, and then rotate the sample placement tray (13). The bridge material sample at the top of the sample placement tray (13) passes through the base plate (11) and stops in the space formed by the base plate (11) and the enclosure (21). S2. The first fan (221) drives the outside air of the closed cover (21) to blow air onto the bridge material sample for weathering, and the xenon lamp (234) continuously irradiates the bridge material sample for photoaging. S3. The motor (31) drives the drive shaft (32) to rotate, which in turn causes the enclosure (21) to rotate relative to the chassis (11), changing the angle of the airflow through the bridge material sample. At the same time, the drive shaft (32) drives the cantilever (231), which in turn causes the xenon lamp (234) to swing periodically inside the enclosure (21). S4. Observe the bridge material sample through transparent glass (211) and evaluate the durability and reliability of the bridge material sample.

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