Steel structure prestress detection device

Abstract

The invention discloses a steel structure prestress detection device, and relates to the technical field of prestress detection technologies. The steel structure prestress detection device comprises a device plate which is horizontally arranged, a moving mechanism is arranged at the bottom of the device plate, the steel structure prestress detection device further comprises a first fixed shaft which is fixedly connected to the outer wall of the device plate, a vertical plate perpendicular to the device plate is rotatably installed on the first fixed shaft, opening and closing plates are slidably installed at the upper end and the lower end of the vertical plate, and the opening and closing plates are fixedly connected to the outer wall of the device plate. Opening and closing parts for driving the opening and closing plates to be close to each other or away from each other are arranged on the vertical plates; the two probes are symmetrically arranged up and down and are respectively mounted on the two opening and closing plates, and detection equipment is fixedly mounted at the bottom of the vertical plate; prestress detection work between the upper portion and the lower portion of the cross beam can be automatically completed through the two probes, manual positioning and adjusting of the probes are not needed, detection is more convenient, and the probes which are automatically aligned up and down can effectively guarantee the detection precision.

Description

Technical Field

[0001] The present invention belongs to the technical field of prestress detection, and specifically relates to a prestress detection device for steel structures. Background Art

[0002] The prestress in a steel structure refers to a stress state artificially introduced into the structure before it bears the actual working load. The purpose is to improve the service performance of the structure, enhance the load-bearing capacity of the structure, and increase the stiffness and durability of the structure. The prestress technology is widely applied in concrete structures. For steel structures, although it is not common, it is also used, such as for strengthening steel beams in high-speed railway stations or in bridge engineering.

[0003] During the installation process of the crossbeam in a high-speed railway station, in order to ensure the stability of the high-speed railway station, prestress detection is carried out on the crossbeam before and during installation, and mainly ultrasonic detection is used. During the detection process, the ultrasonic transmitter probe and the receiver probe are respectively placed on the upper and lower sides and both ends of the crossbeam. By using the relationship between the ultrasonic propagation speed and the material elastic modulus, the change in the prestress level is evaluated by measuring the propagation time. Since the crossbeam is large in size and arched in the middle, a large amount of detection time is required for workers to achieve multi-point detection. And because there is an inclined plane on the top of the crossbeam, workers need to use a probe with an inclination angle or use a wedge block to assist in detection, which will lead to higher detection complexity, and it is difficult to align the two probes up and down, affecting the detection accuracy. Moreover, when detecting during the installation process, the position of the crossbeam is relatively high, and the safety during the detection process is extremely low. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a prestress detection device for steel structures that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is: A prestress detection device for steel structures includes a horizontally arranged device plate, and a moving mechanism is provided at the bottom of the device plate. It further includes: a first fixed shaft fixedly connected to the outer wall of the device plate. Among them, a vertical plate perpendicular to the device plate is rotatably installed on the first fixed shaft. Sliding plates are slidably installed at both the upper and lower ends of the vertical plate, and an opening and closing part for driving the sliding plates to approach or move away from each other is provided on the vertical plate; two probes symmetrically arranged up and down are respectively installed on the two sliding plates. Among them, a detection device is fixedly installed at the bottom of the vertical plate, and an inclined cutting surface is provided on the detection surface of the probe at the top of the vertical plate. A switching component is provided on the device plate. When the angle between the device plate and the vertical plate is obtuse or acute, the switching component drives the probe at the top to rotate 90° around the axis.

[0006] Preferably, the moving mechanism includes two pairs of rollers rotatably mounted on both sides of the lower end of the device plate, and a driving source for driving the rollers to rotate is fixedly mounted on the bottom of the device plate.

[0007] Preferably, the opening and closing part includes a double-headed threaded rod rotatably connected to the side wall of the vertical plate. The two opening and closing plates are respectively threadedly connected to both ends of the double-headed threaded rod. A driving motor is fixedly mounted on the vertical plate. Transmission gears are fixedly mounted on the output shaft of the driving motor and the outer wall of the double-headed threaded rod respectively, and the two transmission gears are meshed and connected.

[0008] Preferably, sleeves are rotatably connected to both of the two opening and closing plates. Thrust rods are longitudinally slidably mounted in the two sleeves respectively. The two probes are fixedly connected to the two thrust rods respectively. A compression spring is installed between the thrust rod and the inside of the sleeve.

[0009] Preferably, the swapping component includes an arc-shaped rack fixedly mounted on the device plate. A driven gear is fixedly mounted on the outer wall of the sleeve located at the top of the vertical plate. The driven gear is meshed with the arc-shaped rack.

[0010] Furthermore, the end of the thrust rod is rotatably connected to a side plate through a horizontal shaft. A torsion spring is installed between the horizontal shaft and the thrust rod. The side plate is inclined to the probe. A spray pipe is fixedly mounted on the side plate. Nozzles are fixedly mounted on the outer wall of the spray pipe. A linkage part for driving the horizontal shaft to rotate is provided on the vertical plate.

[0011] Furthermore, the linkage part includes a straight rack fixedly mounted on the vertical plate. A driven gear is installed at the shaft end of the horizontal shaft through a one-way bearing. The driven gear is meshed with the straight rack. When the two driven gears move towards each other following the two probes at the initial stage, the driven gear will slide over the straight rack, and the nozzles will sweep across the detection surface of the probe.

[0012] Furthermore, a storage bucket is fixedly connected to the bottom of the vertical plate through a bracket. A delivery pipe extending to the inner bottom of the storage bucket is fixedly connected to the storage bucket. The delivery pipe is connected to the spray pipe through a delivery part.

[0013] Furthermore, the delivery part includes an elastic airbag fixedly connected to the inner wall of the side plate. An input pipe and an output pipe communicated with the elastic airbag are fixedly connected to the outer wall of the elastic airbag. Check valves are fixedly mounted in both the input pipe and the output pipe. The end of the input pipe is fixedly connected to the delivery pipe. The end of the output pipe is fixedly connected to the spray pipe. When the side plate rotates following the horizontal shaft, the elastic airbag on the side plate will be pressed by the side wall of the probe.

[0014] Furthermore, a strip-shaped plate is rotatably connected to the outer wall of the device plate through a second fixed shaft. The strip-shaped plate and the vertical plate are respectively located on the front and back sides of the device plate. A hook is fixedly connected to the bottom of the strip-shaped plate, and a short column is fixedly connected to the bracket. The hook is hung on the short column.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. By starting the drive motor, the two opening and closing plates will drive the two probes to respectively press against the upper and lower surfaces of the cross beam. At this time, the detection device can complete the prestress detection work between the upper and lower parts of the cross beam through the two probes, without manual positioning and adjustment of the probes, making the detection more convenient, and the automatically aligned upper and lower probes can effectively guarantee the detection accuracy.

[0016] 2. By placing the device plate on the top inclined surface of the steel structure cross beam, the vertical plate will rotate on the first fixed shaft under the action of gravity and be perpendicular to the horizontal plane. The sleeve will drive the probe at the top to rotate 90° through the ejector rod. As a result, the inclined surface of the probe will be parallel to the inclined surface of the cross beam. When the device plate moves to the inclined surface on the other side of the steel structure cross beam, that is, the inclined surface with the opposite inclination direction, the sleeve will drive the probe to reverse 180° through the ejector rod. As a result, the inclined surface at the bottom of the probe will be parallel to the inclined surface on the other side of the cross beam, and the work of automatically changing the direction of the probe can be completed, making the detection process more convenient and ensuring the detection accuracy.

[0017] 3. When the probe approaches the surface of the cross beam, the probe will drive the passive gear to sweep across the straight rack, and the spray pipe will drive the spray head to sweep across the surface of the probe. The spray head can automatically spray the coupling agent on the surface of the probe, without manual application of the coupling agent, making the detection more convenient and ensuring the detection accuracy and efficiency.

[0018] 4. The side plate will drive the elastic air bag to swing, and the elastic air bag will be pressed by the side wall of the probe. When being pressed, the coupling liquid will be conveyed to the spray pipe through the output pipe, so that the work of conveying the coupling liquid can be automatically realized, and the degree of automation is higher.

[0019] The following further describes in detail the specific implementation manners of the present invention with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings: Figure 1 is an axonometric structural view of a steel structure prestress detection device proposed by the present invention; Figure 2 is an axonometric structural view of a steel structure prestress detection device in the use state proposed by the present invention; Figure 3 is a partial axonometric structural view of a steel structure prestress detection device proposed by the present invention; Figure 4 Axonometric structure schematic of the device plate of a steel structure prestress detection device proposed by the present invention Figure 1 ; Figure 5 Axonometric structure schematic of the device plate of a steel structure prestress detection device proposed by the present invention Figure 2 ; Figure 6 Axonometric structure schematic diagram of the double-headed threaded rod of a steel structure prestress detection device proposed by the present invention; Figure 7 Axonometric sectional structure schematic diagram of the sleeve of a steel structure prestress detection device proposed by the present invention; Figure 8 Axonometric structure schematic diagram of the storage barrel of a steel structure prestress detection device proposed by the present invention.

[0021] In the figure: 1, device plate; 2, roller; 3, drive source; 4, first fixed shaft; 5, vertical plate; 6, double-headed threaded rod; 7, opening and closing plate; 8, sleeve; 9, ejector rod; 10, ejector spring; 11, probe; 12, driven gear; 13, arc rack; 14, drive motor; 15, transmission gear; 16, horizontal shaft; 17, side plate; 18, spray pipe; 19, spray head; 20, passive gear; 21, straight rack; 22, bracket; 23, storage barrel; 24, conveying pipe; 25, detection equipment; 26, elastic airbag; 27, input pipe; 28, output pipe; 29, strip plate; 30, hook; 31, short column; 32, guide roller; 33, inclined section; 34, device groove; 35, second fixed shaft; 36, protective cover. Specific embodiments

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0023] Example 1: Refer to Figures 1 - 8, a prestress detection device for steel structures, comprising a horizontally arranged device plate 1. A moving mechanism is provided at the bottom of the device plate 1. The moving mechanism includes two pairs of rollers 2 rotatably installed on both sides of the lower end of the device plate 1. A driving source 3 for driving the rollers 2 to rotate is fixedly installed at the bottom of the device plate 1. The driving source 3 can be an electric motor for driving the rollers 2 to rotate. It further includes: a first fixed shaft 4 fixedly connected to the outer wall of the device plate 1. A vertical plate 5 perpendicular to the device plate 1 is rotatably installed on the first fixed shaft 4. Opening and closing plates 7 are slidably installed at both the upper and lower ends of the vertical plate 5. An opening and closing part for driving the opening and closing plates 7 to approach or move away from each other is provided on the vertical plate 5. Two probes 11 symmetrically arranged up and down are respectively installed on the two opening and closing plates 7. One probe 11 is used to send ultrasonic signals, and the other probe 11 is used to receive ultrasonic signals. A detection device 25 is fixedly installed at the bottom of the vertical plate 5. The detection device 25 is an ultrasonic detector, and the detection method is the transmission method. During use, the detection device 25 detects the prestress in the steel structure through the two probes 11. An inclined section 33 is provided on the detection surface of the probe 11 at the top of the vertical plate 5. When the vertical plate 5 is perpendicular to the device plate 1, the inclined section 33 faces the front of the device plate 1 and the cross beam. A switching component is provided on the device plate 1. When the angle between the device plate 1 and the vertical plate 5 is obtuse or acute, the switching component drives the top probe 11 to rotate 90° around the axis, and the switching component is used to make the inclined section 33 face both sides of the cross beam.

[0024] Specifically, before use, the surface of the steel structure crossbeam is cleaned. When in use, the device plate 1 is placed on the top inclined surface of the steel structure crossbeam. At this time, the rollers 2 on the device plate 1 will fit on the top surface of the crossbeam. Since the detection device 25 is installed at the bottom of the vertical plate 5, the vertical plate 5 will rotate on the first fixed shaft 4 under the action of gravity and be perpendicular to the horizontal plane. Then, the device plate 1 on the inclined surface is no longer perpendicular to the vertical plate 5, and the angle between the two will change from a right angle to an acute angle or an obtuse angle. The rotating vertical plate 5 will drive the probe 11 to rotate by 90° through the switching component. Thus, the inclined surface of the probe 11 will be parallel to the inclined surface of the crossbeam. Then, the two opening and closing plates 7 are driven to approach each other through the opening and closing part. The two opening and closing plates 7 will drive the two groups of probes 11 to approach each other. The two probes 11 will respectively press against the upper and lower surfaces of the crossbeam. At this time, the detection device 25 can complete the prestress detection work between the upper and lower parts of the crossbeam through the two probes 11. There is no need for manual positioning and adjustment of the probes 11, which makes the detection more convenient. Moreover, the probes 11 that are automatically aligned up and down can also effectively guarantee the detection accuracy. After the detection at one detection position is completed, the two probes 11 can be driven to move away from each other through the opening and closing part. After detecting one position, the driving source 3 drives the rollers 2 to rotate, and the rollers 2 will drive the device plate 1 to translate along the top of the steel structure crossbeam. During the translation process, the vertical plate 5 will always be perpendicular to the horizontal plane. When moving to the next detection position, just turn off the driving motor 14. When the device plate 1 moves to the inclined surface on the other side of the steel structure crossbeam, that is, the inclined surface with the opposite inclination direction, the switching component will drive the probe 11 to reverse by 180°. Thus, the inclined surface at the bottom of the probe 11 will be parallel to the inclined surface on the other side of the crossbeam, and the direction switching work of the probe 11 can be automatically completed, making the detection process more convenient and ensuring the detection accuracy.

[0025] Embodiment 2: Refer to Figures 1 - 4 and Figures 6 - 7 , a prestress detection device for steel structures, which is basically the same as Embodiment 1. Furthermore: The above-mentioned opening and closing part includes a double-headed threaded rod 6 rotatably connected to the side wall of the vertical plate 5. The thread rotation directions at both ends of the double-headed threaded rod 6 are opposite. The two opening and closing plates 7 are respectively threadedly connected to both ends of the double-headed threaded rod 6. A driving motor 14 is fixedly installed on the vertical plate 5. Transmission gears 15 are fixedly installed on the output shaft of the driving motor 14 and on the outer wall of the double-headed threaded rod 6. The two transmission gears 15 are meshed and connected. A protective cover 36 for shielding the double-headed threaded rod 6 is fixedly connected to the outer wall of the vertical plate 5.

[0026] When it is necessary for the two opening and closing plates 7 and the probe 11 to approach or move away from each other, the driving motor 14 is started. The driving motor 14 will drive the double-headed threaded rod 6 to rotate through two meshing transmission gears 15. The double-headed threaded rod 6 will drive the two opening and closing plates 7 to approach each other. The two opening and closing plates 7 will drive the two groups of sleeves 8 and the probe 11 to approach each other. The two probes 11 will respectively press against the upper and lower surfaces of the cross beam. At this time, the detection device 25 can complete the prestress detection work between the upper and lower parts of the cross beam through the two probes 11. When it is necessary for the two probes 11 to move away from each other, the driving motor 14 is reversed. The reversed double-headed threaded rod 6 will drive the two probes 11 to move away from each other.

[0027] The above two opening and closing plates 7 are both rotatably connected with sleeves 8. Longitudinal sliding rods 9 are installed in the two sleeves 8. The axial cross-section shape of the rod 9 is non-circular, such as a regular hexagon. The two probes 11 are respectively fixedly connected to the two rods 9. A pressing spring 10 is installed between the rod 9 and the inside of the sleeve 8. A device groove 34 for avoiding the rod 9, the sleeve 8 and the probe 11 is provided at the top of the device plate 1.

[0028] Specifically, when the two sleeves 8 drive the two probes 11 to approach each other and the width of the steel structure cross beam is relatively large, the cross beam will give a reaction force to the probe 11. Then, the rod 9 will slide into the sleeve 8 and compress the pressing spring 10. The pressing spring 10 will elastically press the probe 11 against the surface of the cross beam to reduce the gap between the probe 11 and the surface of the cross beam, improve the detection accuracy, and can adapt to steel structure cross beams of different widths.

[0029] The above-mentioned replacement components include an arc-shaped rack 13 fixedly installed on the device plate 1. A driven gear 12 is fixedly installed on the outer wall of the sleeve 8 at the top of the vertical plate 5. The driven gear 12 is meshed with the arc-shaped rack 13.

[0030] Specifically, during use, since the detection device 25 is installed at the bottom of the vertical plate 5, another function of the detection device 25 at this time is to act as a counterweight at the bottom of the vertical plate 5. Then, the vertical plate 5 will rotate on the first fixed shaft 4 under the action of gravity and be perpendicular to the horizontal plane. Then, the device plate 1 located on the inclined surface is no longer perpendicular to the vertical plate 5, and the angle between the two will change from a right angle to an acute angle or an obtuse angle. The rotating vertical plate 5 will drive the driven gear 12 at the top to roll along the arc-shaped rack 13. The driven gear 12 will drive the sleeve 8 to rotate by 90°. The sleeve 8 will drive the probe 11 at the top to rotate by 90° through the rod 9. Then, the inclined surface of the probe 11 will be parallel to the inclined surface of the cross beam. When the device plate 1 moves to the other inclined surface of the steel structure cross beam, that is, the inclined surface with the opposite inclination direction, the driven gear 12 will roll to the other side along the arc-shaped rack 13. The sleeve 8 will drive the probe 11 to reverse 180° through the rod 9. Then, the inclined surface at the bottom of the probe 11 will be parallel to the other inclined surface of the cross beam, and the work of automatically replacing the direction of the probe 11 can be completed.

[0031] Example 3: Refer to Figures 6 - 8 , a prestress detection device for steel structures, which is basically the same as that in Example 2. Further: The end of the above ejector rod 9 is rotatably connected with a side plate 17 through a horizontal shaft 16. A torsion spring is installed between the horizontal shaft 16 and the ejector rod 9. The side plate 17 is inclined to the probe 11. A spray pipe 18 is fixedly installed on the side plate 17. A spray head 19 is fixedly installed on the outer wall of the spray pipe 18. The spray head 19 is used to spray coupling liquid onto the surface of the probe 11. A linkage part for driving the horizontal shaft 16 to rotate is provided on the vertical plate 5. The linkage part includes a straight rack 21 fixedly installed on the vertical plate 5. A passive gear 20 is installed at the shaft end of the horizontal shaft 16 through a one-way bearing. The passive gear 20 is meshed and connected with the straight rack 21. When the two passive gears 20 move towards each other following the two probes 11 at the initial stage, the passive gear 20 will slide over the straight rack 21, and the spray head 19 will sweep across the detection surface of the probe 11.

[0032] When the probe 11 approaches the surface of the cross beam, the probe 11 will drive the passive gear 20 to sweep across the straight rack 21. The passive gear 20 will drive the horizontal shaft 16 to rotate. The horizontal shaft 16 will drive the side plate 17 and the spray pipe 18 to swing. The spray pipe 18 will drive the spray head 19 to sweep across the surface of the probe 11. The spray head 19 can automatically spray the coupling agent onto the surface of the probe 11, eliminating the need for manual application of the coupling agent, making the detection more convenient, and ensuring the detection accuracy and efficiency. When the passive gear 20 slides over the straight rack 21, the torsion spring will drive the side plate 17 and the spray pipe 18 to swing back in the reverse direction. Since the passive gear 20 is installed at the end of the horizontal shaft 16 through a one-way bearing, when the probe 11 drives the passive gear 20 to move back and reset in the reverse direction, the passive gear 20 will only rotate idly and will not drive the spray pipe 18 to swing again.

[0033] In practice, another row of spray heads 19 can be installed on the spray pipe 18. The two groups of spray heads 19 are symmetrically arranged on both sides of the spray pipe 18. Thus, the other group of spray heads 19 can spray the coupling liquid onto the surface of the steel structure cross beam to improve the effect of the coupling liquid.

[0034] Example 4: Refer to Figures 1 - 3 and Figure 8 , a prestress detection device for steel structures, which is basically the same as that in Example 3. Further: The bottom of the vertical plate 5 is fixedly connected with a storage barrel 23 through a bracket 22. The storage barrel 23 is used to store the coupling liquid. A delivery pipe 24 extending to its inner bottom is fixedly connected to the storage barrel 23. The delivery pipe 24 is connected to the spray pipe 18 through a delivery part. The delivery part includes an elastic airbag 26 fixedly connected to the inner wall of the side plate 17. The elastic airbag 26 has elasticity. An input pipe 27 and an output pipe 28 communicated with it are fixedly connected to the outer wall of the elastic airbag 26. One-way valves are fixedly installed in both the input pipe 27 and the output pipe 28. The end of the input pipe 27 is fixedly connected to the delivery pipe 24, and the end of the output pipe 28 is fixedly connected to the spray pipe 18. When the side plate 17 rotates along with the horizontal axis 16, the elastic airbag 26 on the side plate 17 will be pressed against the side wall of the probe 11.

[0035] When the side plate 17 swings, the side plate 17 will drive the elastic airbag 26 to swing, and the elastic airbag 26 will be pressed against the side wall of the probe 11. When being pressed, the coupling liquid will be delivered to the spray pipe 18 through the output pipe 28. Thus, the delivery work of the coupling liquid can be automatically realized, and the degree of automation is higher. When the side plate 17 swings back to its original position, the elastic airbag 26 will no longer be pressed by the probe 11, and the elastic airbag 26 will suck the coupling liquid in the storage barrel 23 through the input pipe 27, so as to facilitate the delivery of the coupling liquid into the spray pipe 18 next time. Since the storage barrel 23 is installed on the bracket 22 at the bottom of the vertical plate 5, the storage barrel 23 can also counterweight the bottom of the vertical plate 5, so that the vertical plate 5 is more stable and perpendicular to the horizontal plane.

[0036] A strip-shaped plate 29 is rotatably connected to the outer wall of the device plate 1 through a second fixed shaft 35. The strip-shaped plate 29 and the vertical plate 5 are respectively located on the front and back sides of the device plate 1. A hook 30 is fixedly connected to the bottom of the strip-shaped plate 29. A short column 31 is fixedly connected to the bracket 22. The hook 30 is hung on the short column 31.

[0037] Specifically, after the device plate 1 is placed on the cross beam, rotate the strip-shaped plate 29 to hook the hook 30 at the bottom of the strip-shaped plate 29 on the short column 31. Then the strip-shaped plate 29 and the vertical plate 5 can basically bisect the weight on the front and back sides of the device plate 1. In this way, the device plate 1 can be more stable, and it can also guide the movement of the device plate 1 to prevent the two probes 11 from tilting significantly. In order to reduce the resistance between the strip-shaped plate 29 and the vertical plate 5, guide rollers 32 can actually be installed on the inner walls of the strip-shaped plate 29 and the vertical plate 5.

[0038] Before the present invention is used, the surface of the steel structure crossbeam is cleaned. When in use, the device plate 1 is placed on the top inclined surface of the steel structure crossbeam. At this time, the rollers 2 on the device plate 1 will fit on the top surface of the crossbeam. Since the detection device 25 is installed at the bottom of the vertical plate 5, the vertical plate 5 will rotate on the first fixed shaft 4 under the action of gravity and be perpendicular to the horizontal plane. Then, the device plate 1 located on the inclined surface is no longer perpendicular to the vertical plate 5, and the included angle between the two will change from a right angle to an acute angle or an obtuse angle. The rotating vertical plate 5 will drive the driven gear 12 at the top to roll along the arc-shaped rack 13, and the driven gear 12 will drive the sleeve 8 to rotate by 90°. The sleeve 8 will drive the probe 11 at the top to rotate by 90° through the ejector rod 9. Thus, the inclined surface of the probe 11 will be parallel to the inclined surface of the crossbeam. Then, the driving motor 14 is started, and the driving motor 14 will drive the double-headed threaded rod 6 to rotate through two meshing transmission gears 15. The double-headed threaded rod 6 will drive the two opening and closing plates 7 to approach each other. The two opening and closing plates 7 will drive the two groups of sleeves 8 and the probes 11 to approach each other. The two probes 11 will respectively press against the upper and lower surfaces of the crossbeam. At this time, the detection device 25 can complete the prestress detection work between the upper and lower parts of the crossbeam through the two probes 11. There is no need for manual positioning and adjustment of the probe 11, the detection is more convenient, and the automatically aligned upper and lower probes 11 can also effectively guarantee the detection accuracy. After the detection is completed, the driving motor 14 is reversed, and the reversed double-headed threaded rod 6 will drive the two probes 11 to move away from each other.

[0039] After detecting a position, the driving source 3 drives the rollers 2 to rotate. The rollers 2 will drive the device plate 1 to translate along the top of the steel structure crossbeam. During the translation process, the vertical plate 5 will always be perpendicular to the horizontal plane. When moving to the next detection position, just turn off the driving motor 14. When the device plate 1 moves to the other inclined surface of the steel structure crossbeam, that is, the inclined surface with the opposite inclination direction, the driven gear 12 will roll to the other side along the arc-shaped rack 13, and the sleeve 8 will drive the probe 11 to reverse 180° through the ejector rod 9. Thus, the inclined surface at the bottom of the probe 11 will be parallel to the other inclined surface of the crossbeam, and the direction adjustment work of the probe 11 can be automatically completed, making the detection process more convenient and ensuring the detection accuracy.

[0040] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A steel structure prestress detection device, comprising a horizontally arranged device plate (1), wherein a moving mechanism is provided at the bottom of the device plate (1), characterized in that: Also includes: A first fixed shaft (4) is fixedly connected to the outer wall of the device plate (1). Wherein, a vertical plate (5) perpendicular to the device plate (1) is rotatably mounted on the first fixed shaft (4), an opening and closing plate (7) is slidably mounted on both upper and lower ends of the vertical plate (5), and an opening and closing portion for driving the opening and closing plates (7) to move closer to or away from each other is provided on the vertical plate (5); Two probes (11) symmetrically arranged up and down are respectively mounted on the two opening and closing plates (7). A detection device (25) is fixedly mounted at the bottom of the vertical plate (5), a detection surface of the probe (11) located at the top of the vertical plate (5) is provided with a chamfered surface (33), and a replacement component is provided on the device plate (1), and when the angle between the device plate (1) and the vertical plate (5) is at an obtuse angle or an acute angle, the replacement component drives the probe (11) at the top to rotate 90° around the axis.

2. A steel structure prestress detection device according to claim 1, characterized in that: The moving mechanism comprises two pairs of rollers (2) rotatably mounted on both sides of the lower end of the device plate (1), and a driving source (3) for driving the rollers (2) to rotate is fixedly mounted on the bottom of the device plate (1).

3. A steel structure prestress detection device according to claim 1, characterized in that: The opening and closing portion comprises a double-threaded rod (6) rotatably connected to the side wall of the vertical plate (5); the two opening and closing plates (7) are respectively threadedly connected to the two ends of the double-threaded rod (6); a driving motor (14) is fixedly mounted on the vertical plate (5); a transmission gear (15) is fixedly mounted on the output shaft of the driving motor (14) and the outer wall of the double-threaded rod (6); and the two transmission gears (15) are meshingly connected.

4. A steel structure prestress detection device according to claim 1, characterized in that: The two opening and closing plates (7) are both rotatably connected to a sleeve (8), a push rod (9) is longitudinally slidably installed in the two sleeves (8), the two probes (11) are respectively fixedly connected to the two push rods (9), and a pressure spring (10) is installed between the push rod (9) and the inside of the sleeve (8).

5. A steel structure prestress detection device according to claim 1, characterized in that: The exchange component comprises an arc-shaped rack (13) fixedly mounted on the device plate (1), and a driven gear (12) is fixedly mounted on the outer wall of the sleeve (8) located at the top of the vertical plate (5), and the driven gear (12) is meshingly connected with the arc-shaped rack (13).

6. A steel structure prestress detection device according to claim 4, characterized in that: The end of the push rod (9) is rotatably connected to a side plate (17) via a transverse axis (16); a torsion spring is installed between the transverse axis (16) and the push rod (9); the side plate (17) is inclined relative to the probe (11); a nozzle (18) is fixedly installed on the side plate (17); a nozzle (19) is fixedly installed on the outer wall of the nozzle (18); and a linkage portion for driving the transverse axis (16) to rotate is provided on the vertical plate (5).

7. A steel structure prestress detection device according to claim 6, characterized in that: The linkage part comprises a spur rack (21) fixedly mounted on the vertical plate (5); a passive gear (20) is mounted on the shaft end of the horizontal axis (16) via a one-way bearing; the passive gear (20) is meshingly connected with the spur rack (21); when the two passive gears (20) follow the two probes (11) to move towards each other in the initial stage, the passive gears (20) will slide over the spur rack (21), and the nozzle (19) will sweep over the detection surface of the probe (11).

8. A steel structure prestress detection device according to claim 6, characterized in that: The bottom of the vertical plate (5) is fixedly connected to a storage barrel (23) via a bracket (22); the storage barrel (23) is fixedly connected to a delivery pipe (24) extending to the bottom thereof; the delivery pipe (24) is connected to the nozzle (18) via a delivery portion.

9. A steel structure prestress detection device according to claim 8, characterized in that: The delivery portion comprises an elastic airbag (26) fixedly connected to the inner wall of the side plate (17); an input pipe (27) and an output pipe (28) which are in communication with the elastic airbag (26) are fixedly connected to the outer wall of the elastic airbag (26); a one-way valve is fixedly installed in each of the input pipe (27) and the output pipe (28); the end of the input pipe (27) is fixedly connected to the delivery pipe (24); the end of the output pipe (28) is fixedly connected to the nozzle (18); when the side plate (17) rotates along the transverse axis (16), the elastic airbag (26) on the side plate (17) is pressed against the side wall of the probe (11).

10. A steel structure prestress detection device according to claim 8, characterized in that: The outer wall of the device plate (1) is rotatably connected to a strip plate (29) via a second fixed axis (35); the strip plate (29) and the vertical plate (5) are respectively located at the front and rear sides of the device plate (1); a hook (30) is fixedly connected to the bottom of the strip plate (29); a short column (31) is fixedly connected to the bracket (22); and the hook (30) is suspended on the short column (31).

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