Multifunctional steel structure crack monitoring test platform

Abstract

The invention belongs to the technical field of steel structure monitoring, and particularly relates to a multifunctional steel structure crack monitoring test platform which comprises a conveying platform, and a centering structure is arranged on the conveying platform; the mounting rods and the guide rollers can be used in cooperation, when the steel structure moves to the positions of the guide rollers, the steel structure with the small size can move towards the center of the conveying platform under the action of the guide rollers and finally penetrates through the position between the guide rollers on the two sides to be centered, and when the size of the steel structure is large, the steel structure can be conveyed to the center of the conveying platform. When the steel structure is detected, the mounting rods on the two sides rotate under the action of the steel structure, the spring is changed from a loose state to a stretched state, the steel structure is clamped between the guide rollers on the two sides, and the steel structure is located at the center of the conveying platform under the action of the spring, so that the steel structure is positioned to the middle of the conveying platform before being detected; the steel structure is prevented from deviating, and the crack detection effect of the steel structure is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure monitoring, and in particular relates to a multifunctional steel structure crack monitoring test platform. Background Art

[0002] Steel structure is a structure made of steel materials and is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates, and adopts rust removal and rust prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing. The various components or parts are usually connected by welds, bolts or rivets. Due to their light weight and simple construction, they are widely used in large factories, stadiums, super high-rise buildings and other fields. Steel structures are prone to rust. Generally, steel structures need to be rust-removed, galvanized or painted, and regularly maintained. At the same time, the occurrence of cracks in steel structures will have an adverse effect on the mechanical properties of steel structures. Therefore, it is particularly important to monitor the surface and near-surface cracks of steel structures. In the existing technology, internal defect detection methods of steel structures including ultrasonic and radiographic detection are often used to detect cracks in steel structures. When inspecting steel structures, workers usually place the steel structure on a conveying platform, which then transports the steel structure to the location of the detection device, and the detection device performs the inspection to reduce the labor intensity of the workers. However, due to the different sizes of different types of steel structures, workers need to place the steel structure in the middle of the conveying platform when placing it to ensure the inspection effect of the steel structure, which results in high labor intensity and high labor costs for the workers, and easily causes the steel structure to shift during transportation.

[0003] In order to solve the above problems, this application proposes a multifunctional steel structure crack monitoring test platform. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a multifunctional steel structure crack monitoring test platform, which has the characteristic of preventing the steel structure from deflecting during detection and transportation.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a multifunctional steel structure crack monitoring test platform, comprising a transmission platform, wherein a centering structure is provided on the transmission platform;

[0006] The cam is secured to the platform by a secure connection to the platform, and the sliding panel also is connected with the support frame, and the sliding panel also is connected with the support frame, and the sliding panel also is connected with the support frame.

[0007] As a preferred multifunctional steel structure crack monitoring test platform of the present invention, the top of each connecting column is provided with an external thread, the top of each connecting column is threadedly connected to a positioning nut, and each positioning nut is provided on the top surface of the adjacent mounting rod.

[0008] As a preferred embodiment of the multifunctional steel structure crack monitoring test platform of the present invention, the mounting rod is an L-shaped structure, and the mounting rods on both sides are symmetrically arranged.

[0009] As a preferred embodiment of the multifunctional steel structure crack monitoring test platform of the present invention, the top end of each of the fixing columns is fixedly connected to a limiting rod, and the limiting rods are arranged at a position close to the first fixing plate.

[0010] As a preferred embodiment of a multifunctional steel structure crack monitoring test platform of the present invention, the transmission platform is provided with an adjustable detection structure;

[0011] The adjustable detection structure includes symmetrically arranged fixed blocks, which are respectively fixedly connected to both sides of the conveying platform, and a side plate is fixedly connected to the top surface of each fixed block, a lifting plate is provided between the side plates, and an infrared sensing scanner is installed at the center position of the bottom surface of the lifting plate, and second connecting holes are symmetrically opened on both sides of the lifting plate, and a first threaded ring is fixedly connected to the position of the lifting plate on the top surface of the lifting plate near any side, and a third fixed plate is fixedly connected to the side plate near the first threaded ring, and a lifting threaded rod is rotatably connected to the top surface of the third fixed plate, and the lifting threaded rod is arranged in the adjacent second connecting hole and is threadedly connected to the first threaded ring, a second support plate is provided at the bottom of the third fixed plate, and the second support plate is fixedly connected to the adjacent side plate, and a lifting motor is installed on the top surface of the second support plate, and the output shaft of the lifting motor passes through the third fixed plate and is fixedly connected to the lifting threaded rod.

[0012] As a preferred multifunctional steel structure crack monitoring test platform of the present invention, a fourth fixing plate is fixedly connected to the side plate away from the third fixing plate, and a guide column is fixedly connected to the top surface of the fourth fixing plate, and the guide column is arranged near the second connecting hole.

[0013] As a preferred embodiment of the multifunctional steel structure crack monitoring test platform of the present invention, a limiting plate is fixedly connected to the top surface of each side plate.

[0014] As a preferred multifunctional steel structure crack monitoring test platform of the present invention, guide grooves are symmetrically arranged on the lifting plate, a moving rod is arranged in each of the guide grooves, an ultrasonic probe is installed at the bottom end of each of the moving rods, and a connecting block is fixedly connected to the top end of each of the moving rods.

[0015] As a preferred multifunctional steel structure crack monitoring test platform of the present invention, a fifth fixed plate is symmetrically fixedly connected to the top surface of the lifting plate, and a bidirectional threaded rod is arranged between the fifth fixed plates, and both ends of the bidirectional threaded rod are rotatably connected to the adjacent fifth fixed plate respectively, and the bidirectional threaded rod is threadedly connected to a second threaded ring at a position close to the connecting block, and a connecting rod is fixedly connected to the outer wall of each second threaded ring, and the connecting rods are respectively fixedly connected to the adjacent connecting blocks, and an adjusting motor is installed on the fifth fixed plate away from the first threaded ring, and the output shaft of the adjusting motor passes through the adjacent fifth fixed plate and is fixedly connected to the bidirectional threaded rod.

[0016] As a preferred multifunctional steel structure crack monitoring test platform of the present invention, the bottom of the conveying platform is fixedly connected to a support frame, a drive motor is installed on the side of the conveying platform away from the central structure, the output shaft of the drive motor is fixedly connected to the drive shaft of the conveying platform, and a variable frequency speed regulator is installed on the conveying platform near the central structure.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: a centering structure is added to the present application, and the installation rod and the guide roller can be used in combination. When the steel structure moves to the position of the guide roller, the smaller-sized steel structure will move toward the center of the conveying platform under the action of the guide roller, and finally pass through between the guide rollers on both sides to achieve centering. When the size of the steel structure is larger, the installation rods on both sides will rotate under the action of the steel structure, so that the spring changes from a relaxed state to a stretched state, so that the steel structure is sandwiched between the guide rollers on both sides, and under the action of the spring, the steel structure is placed in the center of the conveying platform, thereby realizing the positioning of the steel structure on the conveying platform before inspection. The middle position of the steel structure prevents the steel structure from shifting, ensuring the effect of steel structure crack detection. At the same time, there is no need for staff to manually adjust the position of the steel structure multiple times, which reduces the labor intensity of staff and reduces labor costs. At the same time, an adjustable detection structure is added. When the steel structure is moved to the position of the adjustable detection structure by the conveyor platform, the infrared sensing scanner will perform crack detection on the steel structure, and the ultrasonic probe will perform crack detection on both sides of the steel structure, which has a better detection effect. The height position of the infrared sensing scanner and the distance between the ultrasonic probes on both sides can be adjusted according to the size of the steel structure, so that crack detection can be performed on steel structures of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A first partial structural schematic diagram;

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the local structure;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the local structure;

[0023] Figure 5 For the present invention Figure 1 A second partial structural diagram;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the local structure;

[0025] Figure 7 For the present invention Figure 6Schematic diagram of the local structure;

[0026] In the picture:

[0027] 1. Conveying platform; 11. Support frame; 12. Driving motor; 13. Frequency converter;

[0028] 2. Centering structure; 21. First support plate; 22. Fixed column; 23. Rotating column; 24. Mounting rod; 25. First connecting hole; 26. Connecting column; 27. Guide roller; 28. Positioning nut; 29. First fixing plate; 210. Spring; 211. Second fixing plate; 212. Limiting rod;

[0029] 3. Adjustable detection structure; 31. Fixed block; 32. Side plate; 33. Lifting plate; 34. Second connecting hole; 35. First threaded ring; 36. Third fixed plate; 37. Lifting threaded rod; 38. Second support plate; 39. Lifting motor; 310. Infrared sensor scanner; 311. Limiting plate; 312. Fourth fixed plate; 313. Guide column; 314. Guide groove; 315. Moving rod; 316. Ultrasonic probe; 317. Connecting block; 318. Fifth fixed plate; 319. Bidirectional threaded rod; 320. Adjusting motor; 321. Second threaded ring; 322. Connecting rod. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 4 As shown;

[0033] In order to prevent the steel structure from deflecting during inspection and transportation, this multifunctional steel structure crack monitoring test platform includes a conveying platform 1, on which a central structure 2 is provided;

[0034] The central structure 2 includes a symmetrically arranged first support plate 21, which is fixedly connected to both sides of the conveying platform 1 respectively. A fixing column 22 is fixedly connected to the top surface of each first support plate 21, and the top of each fixing column 22 is rotatably connected to a rotating column 23. The top of each rotating column 23 is fixedly connected to a mounting rod 24. Each mounting rod 24 is equidistantly provided with a number of first connecting holes 25, and each first connecting hole 25 is provided with a connecting column 26. The bottom end of each connecting column 26 is rotatably connected to a guide roller 27. A first fixing plate 29 is fixedly connected to the outer wall of each fixing column 22, and each mounting rod 24 is fixedly connected to a second fixing plate 211 near the first fixing plate 29. Each second fixing plate 211 is fixedly connected to a spring 210 on one side near the first fixing plate 29, and the end of the spring 210 away from the second fixing plate 211 is fixedly connected to the adjacent first fixing plate 29.

[0035] In this embodiment: when in use, the staff places the steel structure to be inspected on the conveying platform 1 close to the side of the central structure 2, and the steel structure will move toward the central structure 2 under the action of the conveying platform 1. When the steel structure moves to the position of the guide roller 27, the smaller-sized steel structure will move toward the center of the conveying platform 1 under the action of the guide roller 27, and finally pass through between the guide rollers 27 on both sides to achieve centering. When the size of the steel structure is large, the mounting rods 24 on both sides will rotate under the action of the steel structure, so that the spring 210 changes from a relaxed state to a stretched state, so that the steel structure is sandwiched between the guide rollers 27 on both sides, and under the action of the spring 210, the steel structure is in the center position of the conveying platform 1, thereby realizing positioning the steel structure in the middle position of the conveying platform 1 before inspection, preventing the steel structure from shifting, and ensuring the effect of steel structure crack detection. At the same time, there is no need for the staff to manually adjust the position of the steel structure multiple times, which reduces the labor intensity of the staff and reduces labor costs.

[0036] Going further:

[0037] like Figure 3 As shown;

[0038] Combining the above:

[0039] In order to facilitate the installation of the guide roller 27, in an optional embodiment, the top of each connecting column 26 is provided with an external thread, and the top of each connecting column 26 is threadedly connected to a positioning nut 28, and each positioning nut 28 is provided on the top surface of the adjacent mounting rod 24.

[0040] In this embodiment, by providing an external thread on the connecting column 26 and using a positioning nut 28 to position the connecting column 26, the guide roller 27 can be easily disassembled and adjusted.

[0041] Going further:

[0042] like Figure 3 As shown;

[0043] Combining the above:

[0044] In order to ensure the guiding effect on the steel structure, in an optional embodiment, the installation rod 24 is an L-shaped structure, and the installation rods 24 on both sides are symmetrically arranged.

[0045] In this embodiment, the symmetrically arranged L-shaped mounting rods 24 can better guide the steel structure.

[0046] Going further:

[0047] like Figure 3 As shown;

[0048] Combining the above:

[0049] In order to limit the installation rod 24 , in an optional embodiment, the top end of each fixing column 22 is fixedly connected to a limiting rod 212 , and the limiting rod 212 is arranged at a position close to the first fixing plate 29 .

[0050] In this embodiment, the limiting rod 212 can be provided to limit the rotation of the mounting rod 24 to prevent it from rotating in the reverse direction.

[0051] Going further:

[0052] like Figure 1 、 Figure 5 、 Figure 6 and Figure 7 As shown;

[0053] Combining the above:

[0054] In order to adjust the position of the infrared sensor scanner 310 according to the size of the steel structure, in an optional embodiment, an adjustable detection structure 3 is provided on the conveying platform 1;

[0055] The adjustable detection structure 3 includes symmetrically arranged fixed blocks 31, which are respectively fixedly connected to both sides of the conveying platform 1. A side plate 32 is fixedly connected to the top surface of each fixed block 31, and a lifting plate 33 is arranged between the side plates 32. An infrared sensing scanner 310 is installed at the center position of the bottom surface of the lifting plate 33. Second connecting holes 34 are symmetrically opened on both sides of the lifting plate 33. A first threaded ring 35 is fixedly connected to the top surface of the lifting plate 33 near the position of the lifting plate 33 on either side. A third fixed plate 36 is fixedly connected to the side plate 32 near the first threaded ring 35. A lifting threaded rod 37 is rotatably connected to the top surface of the third fixed plate 36. The lifting threaded rod 37 is arranged in the adjacent second connecting hole 34 and is threadedly connected to the first threaded ring 35. A second support plate 38 is provided at the bottom of the third fixed plate 36. The second support plate 38 is fixedly connected to the adjacent side plate 32. A lifting motor 39 is installed on the top surface of the second support plate 38. The output shaft of the lifting motor 39 passes through the third fixed plate 36 and is fixedly connected to the lifting threaded rod 37.

[0056] In this embodiment: when the steel structure is moved by the conveying platform 1 to the position of the adjustable detection structure 3, the infrared sensing scanner 310 will perform crack detection on the steel structure. In order to ensure the effect of the steel structure detection, the lifting motor 39 can be started according to the size of the steel structure, so that the lifting motor 39 drives the lifting threaded rod 37 to rotate, thereby driving the lifting plate 33 to move up and down, and the height of the infrared sensing scanner 310 is adjusted, so that the infrared sensing scanner 310 can perform crack detection on steel structures of different sizes, and at the same time, it can also better perform crack detection on the steel structure.

[0057] Going further:

[0058] like Figure 5 and Figure 6 As shown;

[0059] Combining the above:

[0060] In order to guide the movement of the lifting plate 33, in an optional embodiment, a fourth fixed plate 312 is fixedly connected to the side plate 32 away from the third fixed plate 36, and a guide column 313 is fixedly connected to the top surface of the fourth fixed plate 312. The guide column 313 is arranged in the adjacent second connecting hole 34.

[0061] In this embodiment:

[0062] Furthermore, by providing the guide column 313 , the lifting and lowering movement of the lifting plate 33 can be guided to prevent the lifting plate 33 from deflecting.

[0063] like Figure 6 As shown;

[0064] Combining the above:

[0065] In order to limit the movement of the lifting plate 33 , in an optional embodiment, a limiting plate 311 is fixedly connected to the top surface of each side plate 32 .

[0066] In this embodiment, the limiting plate 311 can limit the lifting plate 33 to prevent the lifting plate 33 from falling off.

[0067] Going further:

[0068] like Figures 5 to 7 As shown;

[0069] Combining the above:

[0070] In order to facilitate the adjustment of the position of the ultrasonic probe 316, in an optional embodiment, guide grooves 314 are symmetrically provided on the lifting plate 33, and a moving rod 315 is provided in each guide groove 314. The bottom end of each moving rod 315 is installed with an ultrasonic probe 316, and the top end of each moving rod 315 is fixedly connected to a connecting block 317. The top surface of the lifting plate 33 is symmetrically fixedly connected with a fifth fixing plate 318. A bidirectional threaded rod 319 is provided between the fifth fixing plates 318. The two ends of the bidirectional threaded rod 319 are fixedly connected to the top surface of the lifting plate 33. The ends are respectively rotatably connected to the adjacent fifth fixed plate 318, and the two-way threaded rod 319 is threadedly connected to the second threaded ring 321 near the connecting block 317. A connecting rod 322 is fixedly connected to the outer wall of each second threaded ring 321, and the connecting rod 322 is respectively fixedly connected to the adjacent connecting block 317. An adjusting motor 320 is installed on the fifth fixed plate 318 away from the side of the first threaded ring 35, and the output shaft of the adjusting motor 320 passes through the adjacent fifth fixed plate 318 and is fixedly connected to the two-way threaded rod 319.

[0071] In this embodiment: when the steel structure moves between the ultrasonic probes 316 on both sides, the ultrasonic probes 316 will perform crack detection on both sides of the steel structure, thereby improving the effect of crack detection on the steel structure, and can start the adjustment motor 320 according to the size of the steel structure, so that the adjustment motor 320 drives the bidirectional threaded rod 319 to rotate, drives the second threaded ring 321 to move in the opposite direction, and causes the second threaded ring 321 to drive the moving rod 315 to move in the guide groove 314, and adjust the distance between the ultrasonic probes 316 on both sides, so that the ultrasonic probe 316 can detect steel structures of different sizes, with better adaptability.

[0072] Going further:

[0073] like Figure 1 and Figure 2 As shown;

[0074] Combining the above:

[0075] In order to facilitate the adjustment of the speed of the conveying platform 1, in an optional embodiment, a support frame 11 is fixedly connected to the bottom of the conveying platform 1, a drive motor 12 is installed on the side of the conveying platform 1 away from the central structure 2, the output shaft of the drive motor 12 is fixedly connected to the drive shaft of the conveying platform 1, and a variable frequency speed regulator 13 is installed on the conveying platform 1 near the central structure 2.

[0076] In this embodiment: the drive motor 12 is used to drive the conveying platform 1 to operate. When the size of the steel structure is large, the staff can adjust the speed of the drive motor 12 by using the frequency converter 13, so that the conveying platform 1 runs at a slower speed, ensuring that the larger steel structure can be fully inspected.

[0077] The working principle and use process of the present invention are as follows: the driving motor 12 can drive the conveying platform 1 to operate. When the size of the steel structure is large, the staff can adjust the speed of the driving motor 12 by using the frequency converter 13, so that the conveying platform 1 runs at a slower speed to ensure that the larger-sized steel structure can be fully inspected. When in use, the staff will place the steel structure to be inspected on the conveying platform 1 close to the side of the central structure 2. The steel structure will move toward the direction of the central structure 2 under the action of the conveying platform 1. When the steel structure moves to the position of the guide roller 27, the smaller-sized steel structure will move toward the center of the conveying platform 1 under the action of the guide roller 27. , and finally passes through between the guide rollers 27 on both sides to achieve centering. When the size of the steel structure is large, the mounting rods 24 on both sides will rotate under the action of the steel structure, so that the springs 210 change from a relaxed state to a stretched state, so that the steel structure is clamped in the middle by the guide rollers 27 on both sides, and under the action of the springs 210, the steel structure is in the center position of the conveying platform 1, thereby positioning the steel structure to the middle position of the conveying platform 1 before testing, preventing the steel structure from deflecting and ensuring the effect of steel structure crack detection. At the same time, there is no need for the staff to manually adjust the position of the steel structure multiple times, which reduces the labor intensity of the staff and reduces labor costs. When the delivery platform 1 moves to the position of the adjustable detection structure 3, the infrared sensor scanner 310 will perform crack detection on the steel structure. In order to ensure the effect of the steel structure detection, the lifting motor 39 can be started according to the size of the steel structure, so that the lifting motor 39 drives the lifting threaded rod 37 to rotate, thereby driving the lifting plate 33 to move up and down, and adjusting the height of the infrared sensor scanner 310. The lifting plate 33 can be guided by setting the guide column 313 to prevent the lifting plate 33 from deviating, so that the infrared sensor scanner 310 can perform crack detection on steel structures of different sizes, and can also better perform crack detection on the steel structure, and when the steel structure When moving between the ultrasonic probes 316 on both sides, the ultrasonic probe 316 will perform crack detection on both sides of the steel structure, thereby improving the effect of crack detection on the steel structure, and can start the adjustment motor 320 according to the size of the steel structure, so that the adjustment motor 320 drives the bidirectional threaded rod 319 to rotate, drives the second threaded ring 321 to move in the opposite direction, and causes the second threaded ring 321 to drive the moving rod 315 to move in the guide groove 314, and adjust the distance between the ultrasonic probes 316 on both sides, so that the ultrasonic probe 316 can detect steel structures of different sizes, has better adaptability, and thus realizes more comprehensive crack detection of the steel structure.

[0078] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A multifunctional steel structure crack monitoring test platform, comprising a transmission platform (1), characterized in that: The conveying platform (1) is provided with a centering structure (2); The centering structure (2) includes symmetrically arranged first support plates (21), the first support plates (21) are fixedly connected to both sides of the conveying platform (1), each of the first support plates (21) is fixedly connected to a fixed column (22) on the top surface, the top of each of the fixed columns (22) is rotatably connected to a rotating column (23), the top of each of the rotating columns (23) is fixedly connected to a mounting rod (24), each of the mounting rods (24) is evenly spaced and provided with a plurality of first connecting holes (25), and each of the first connecting holes (25) is provided with a connecting column ( 26), the bottom end of each connecting column (26) is rotatably connected to a guide roller (27), the outer wall of each fixed column (22) is fixedly connected to a first fixed plate (29), each mounting rod (24) is fixedly connected to a second fixed plate (211) at a position close to the first fixed plate (29), and each second fixed plate (211) is fixedly connected to a spring (210) on one side close to the first fixed plate (29), and the end of the spring (210) away from the second fixed plate (211) is fixedly connected to the first fixed plate (29) close thereto.

2. The multifunctional steel structure crack monitoring test platform according to claim 1 is characterized by: The top of each connecting column (26) is provided with an external thread, the top of each connecting column (26) is threadedly connected to a positioning nut (28), and each positioning nut (28) is provided on the top surface of the adjacent mounting rod (24).

3. The multifunctional steel structure crack monitoring test platform according to claim 1 is characterized in that: The installation rod (24) is an L-shaped structure, and the installation rods (24) on both sides are symmetrically arranged.

4. The multifunctional steel structure crack monitoring test platform according to claim 1 is characterized in that: The top end of each of the fixing columns (22) is fixedly connected to a limiting rod (212), and the limiting rod (212) is arranged at a position close to the first fixing plate (29).

5. The multifunctional steel structure crack monitoring test platform according to claim 1 is characterized in that: The conveying platform (1) is provided with an adjustable detection structure (3); The adjustable detection structure (3) includes symmetrically arranged fixed blocks (31), the fixed blocks (31) are fixedly connected to both sides of the conveying platform (1), and a side plate (32) is fixedly connected to the top surface of each fixed block (31). A lifting plate (33) is provided between the side plates (32). An infrared sensor scanner (310) is installed at the center position of the bottom surface of the lifting plate (33). Second connecting holes (34) are symmetrically opened on both sides of the lifting plate (33). A first threaded ring (35) is fixedly connected to the top surface of the lifting plate (33) near any side of the lifting plate (33). The side plate (35) near the first threaded ring (35) is fixedly connected to the side plate (35). A third fixed plate (36) is fixedly connected to the plate (32), and a lifting threaded rod (37) is rotatably connected to the top surface of the third fixed plate (36), and the lifting threaded rod (37) is arranged in the adjacent second connecting hole (34) and is threadedly connected to the first threaded ring (35). A second support plate (38) is provided at the bottom of the third fixed plate (36), and the second support plate (38) is fixedly connected to the adjacent side plate (32). A lifting motor (39) is installed on the top surface of the second support plate (38), and the output shaft of the lifting motor (39) passes through the third fixed plate (36) and is fixedly connected to the lifting threaded rod (37).

6. The multifunctional steel structure crack monitoring test platform according to claim 5 is characterized by: A fourth fixing plate (312) is fixedly connected to the side plate (32) away from the third fixing plate (36), a guide column (313) is fixedly connected to the top surface of the fourth fixing plate (312), and the guide column (313) is arranged in the adjacent second connecting hole (34).

7. The multifunctional steel structure crack monitoring test platform according to claim 5 is characterized by: A limiting plate (311) is fixedly connected to the top surface of each side plate (32).

8. The multifunctional steel structure crack monitoring test platform according to claim 5 is characterized by: The lifting plate (33) is symmetrically provided with guide grooves (314), each of the guide grooves (314) is provided with a moving rod (315), the bottom end of each of the moving rods (315) is installed with an ultrasonic probe (316), and the top end of each of the moving rods (315) is fixedly connected with a connecting block (317).

9. The multifunctional steel structure crack monitoring test platform according to claim 8, characterized in that: A fifth fixing plate (318) is symmetrically fixedly connected to the top surface of the lifting plate (33), and a bidirectional threaded rod (319) is provided between the fifth fixing plates (318). Both ends of the bidirectional threaded rod (319) are rotatably connected to the adjacent fifth fixing plate (318). The bidirectional threaded rod (319) is threadedly connected to a second threaded ring (321) at a position close to the connecting block (317). A connecting rod (322) is fixedly connected to the outer wall of each second threaded ring (321), and the connecting rod (322) is fixedly connected to the adjacent connecting block (317). An adjusting motor (320) is installed on the fifth fixing plate (318) away from the first threaded ring (35). The output shaft of the adjusting motor (320) passes through the adjacent fifth fixing plate (318) and is fixedly connected to the bidirectional threaded rod (319).

10. The multifunctional steel structure crack monitoring test platform according to claim 1 is characterized in that: The bottom of the conveying platform (1) is fixedly connected to a support frame (11), a driving motor (12) is installed on the side of the conveying platform (1) away from the central structure (2), the output shaft of the driving motor (12) is fixedly connected to the driving shaft of the conveying platform (1), and a variable frequency speed regulator (13) is installed on the conveying platform (1) near the central structure (2).

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