An underwater structure defect detection device

Abstract

This invention relates to the field of underwater structure inspection technology, specifically to an underwater structure defect detection device, comprising an instrument body, a rebar scanner, and a detection component. Multiple duct propellers are fixedly mounted on the instrument body, and a detection frame is connected to the end of the instrument body. The detection component is installed inside the detection frame, and the rebar scanner is connected to the end of the detection component. The detection component drives the rebar scanner to move vertically. This invention, by setting a detection component on the instrument body and connecting the rebar scanner to the detection component, allows the rebar scanner to move in contact with the rebar protective layer, enabling the rebar scanner to inspect underwater structures. Inspection personnel control the equipment, allowing for the detection of rebar spacing and protective layer thickness even under certain special underwater conditions.

Description

Technical Field

[0001] This invention relates to the field of underwater structure inspection technology, and more particularly to an underwater structure defect detection device. Background Technology

[0002] Underwater structures are generally characterized by complex functions, large scale, and high safety requirements. Their quality and safety are matters of great importance to the national economy and people's livelihood and have always received much attention. Underwater structures, such as dams, sluices, and culverts, are submerged underwater year-round or periodically. They are affected by long-term water infiltration, erosion, scouring, freeze-thaw cycles, construction defects, and the inherent characteristics of materials. During their service life, they inevitably develop appearance defects such as protective layer peeling, exposed rebar, holes, erosion, and cracks, leading to exposed rebar. The exposed rebar comes into further contact with water, and the presence of quality defects in the rebar directly affects the applicability, safety, and durability of the structure. Therefore, it is necessary to conduct regular inspections of underwater structures, with the rebar configuration being a key focus. The conventional inspection scenario involves inspectors using rebar detectors and other devices to inspect the structure under conditions where an inspection surface is available.

[0003] To prevent the steel reinforcement in underwater structures from being exposed to water after long-term erosion by water flow, and considering the difficulty in inspecting the steel reinforcement in certain locations, patent application CN202210973773.2 provides a detection device for underwater steel reinforcement corrosion testing in sluice gates. This invention features a vertically arranged main rod with connecting seats at both ends for connection to the gate pier. Three robotic arms are connected to the main rod, arranged at equal intervals from bottom to top. The device also includes supports, C-shaped rings, pressure detectors, and coarse springs. The C-shaped rings contain the rusted steel reinforcement, causing the coarse springs to compress the pressure detector. The degree of rust is determined based on the pressure readings. An air cylinder, sliding sleeve, and striking pin work together to drive workers in a chisel-like operation, peeling away the carbonized concrete and exposing the internal steel reinforcement. This achieves the goal of replacing manual labor, saving time and effort, and improving work efficiency. However, under certain special conditions, on-site inspection cannot be carried out by personnel, such as in areas with small tunnels or dangerous water flow.

[0004] Therefore, to avoid the inability to carry out underwater structure inspections due to special conditions such as small culverts or dangerous water flow areas, an underwater structure defect detection device is proposed. Summary of the Invention

[0005] The main objective of this invention is to provide an underwater structure defect detection device. To avoid the inability to conduct underwater structure inspections due to special conditions such as small culverts or dangerous water flow areas, a detection component is installed on the main body of the detector. A rebar scanner is connected to the detection component, and the detection component drives the rebar scanner to move in close contact with the rebar protective layer, enabling the rebar scanner to inspect the underwater structure. The inspection personnel control the main body of the detector, which can detect the rebar spacing and protective layer thickness of the target even under certain special underwater conditions, aiming to solve the existing technical problems.

[0006] To achieve the above objectives, the present invention provides an underwater structure defect detection device, comprising:

[0007] The detector body is equipped with a buoyancy panel and a drive mechanism, and two symmetrically distributed wall-mounted plates are provided at the end of the detector body.

[0008] A detection component is disposed between the two wall panels. The detection component includes a detection frame with an opening at the bottom and a rotatable cylindrical tube inside the detection frame. A guide chain mechanism is wound around the cylindrical tube. The guide chain mechanism rewinds or unwinds as the cylindrical tube rotates. The guide chain mechanism is rigid in the unwinding state.

[0009] A rebar scanner, located at the end of the guide chain mechanism, is used to detect defects in underwater structures.

[0010] Furthermore, the chain guide mechanism includes a chain plate, which is formed by multiple chain links hinged together in pairs. The chain links are limited by hinges. A rectangular plate is fixedly installed on the chain link. The rectangular plate is located in the middle of the chain link. The chain link is provided with a rectangular groove that mates with the end of the rectangular plate. The internal shape of the rectangular groove is set as a conical recess.

[0011] Furthermore, the opening has an inclined slope, on which a guide spring is vertically fixed. The end of the guide spring is fixedly connected to a guide plate. The end face of the guide plate is parallel to the inclined slope, and the end face of the guide plate is in contact with the sidewalls of multiple chain links.

[0012] Furthermore, the detection frame is provided with a long plate, the two ends of which movably pass through the wall plate, and the wall plate is provided with a long groove for the long plate to move.

[0013] The long plate is equipped with a linear drive mechanism, and the side wall of the detection frame is equipped with a thrust spring connected to the detector body.

[0014] Furthermore, it also includes a support member, wherein the detection frame is provided with a horizontal spring connected to the support member, and the support member includes a sliding part slidably disposed within the detection frame, wherein both ends of the sliding part extend out of the detection frame and are connected to the support member;

[0015] The support member has a push plate on one side that abuts against it. The push plate has a circular protrusion, and the sliding part has a sliding groove that matches the circular protrusion.

[0016] Furthermore, a rubber track is embedded in the end of the wall panel, and the rubber track is evenly provided with slots, and a side opening is provided on the wall panel;

[0017] The detection frame is provided with a sliding plate, which is connected to the support member, and both ends of the plate extend into the side opening.

[0018] Furthermore, the drive mechanism includes eight ducted propellers, four of which are located at the four corners of the buoyancy panel, and the other four are located at the four corners of the bottom of the detector body. The rotation axis of the four ducted propellers located at the bottom of the detector body forms an angle of 30-60° with the side wall of the rectangular frame supporting the detector body.

[0019] Furthermore, two chain links near the rebar scanner are provided with arc-shaped plates, the convex shape of which faces the connection between the two chain links.

[0020] Furthermore, a guide groove is provided on the guide plate, and the width of the guide groove is equal to the width of the rectangular plate.

[0021] Furthermore, the end face of the support portion is provided with a rubber layer.

[0022] The beneficial effects of this invention are reflected in:

[0023] This invention allows the wall-mounted plate of the detection equipment to be attached to the steel reinforcement protective layer, while the detection frame and the steel reinforcement scanner are also attached to the steel reinforcement protective layer. The steel reinforcement scanner can detect the steel reinforcement within the steel reinforcement protective layer. By operating the detection equipment, underwater structures can be inspected. This avoids the situation where, under certain special conditions, such as when the culvert is small or located in a dangerous water flow area, the inspection personnel are unable to carry out on-site inspection work, thus ensuring accurate and rapid inspection and evaluation of underwater structures.

[0024] This invention features a rebar scanner rotatably mounted at the end of a chain plate, ensuring close contact between the scanner's end face and the surface of the rebar cover. When the driving cylinder rotates, the chain plate extends beyond the detection frame, sliding on a guide plate. Under the thrust of a guide spring, the rebar scanner moves vertically downwards in contact with the rebar cover, detecting the rebar configuration. This ensures the rebar scanner's fit and perpendicularity to the rebar cover during electromagnetic scanning, improving the accuracy of rebar configuration detection. Furthermore, the chain plate can be retracted, which, compared to using a long rod to control its reciprocating movement, occupies less space and is easier to store. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the underwater structure defect detection equipment of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the detection component of the present invention;

[0027] Figure 3 This is a schematic diagram of the rebar scanner of the present invention being attached to the rebar protective layer;

[0028] Figure 4 This is a schematic diagram of the translation of the detection component of the present invention;

[0029] Figure 5 This is a schematic diagram of the detection frame and the wall-mounted plate of the present invention being attached;

[0030] Figure 6 This is a schematic diagram of the cooperation between the card plate and the rubber track of the present invention;

[0031] Figure 7 This is a schematic diagram of the cylindrical tube rotating and driving the chain link to rotate according to the present invention;

[0032] Figure 8 This is a schematic diagram of the guide plate structure of the present invention.

[0033] 1. Detector body; 11. Buoyancy panel; 12. Drive mechanism; 121. Guide tube propeller; 13. Wall-mounted panel; 131. Long slot; 132. Side opening; 2. Detection assembly; 21. Detection frame; 22. Opening; 221. Inclined slope; 23. Cylindrical tube; 231. Connection port; 24. Chain guide mechanism; 241. Chain plate; 242. Chain link; 243. Rectangular plate; 244. Rectangular slot; 25. Guide spring 26. Guide plate; 261. Guide groove; 27. Drive motor; 3. Rebar scanner; 4. Long plate; 41. Linear drive mechanism; 42. Thrust spring; 5. Support component; 51. Sliding part; 511. Sliding groove; 52. Support part; 6. Horizontal spring; 7. Push plate; 71. Circular protrusion; 8. Rubber track; 81. Slot; 9. Card plate; 10. Arc plate; 14. Power electronics compartment; 15. Rebar protective layer. Detailed Implementation

[0034] The technical solutions of 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0035] Please see Figure 1-8 The present invention provides an underwater structure defect detection device, including a detector body 1, a detection component 2 and a rebar scanner 3;

[0036] Specifically, the detector body 1 is provided with a buoyancy panel 11 and a drive mechanism 12, and two symmetrically distributed wall-mounted plates 13 are provided at the end of the detector body 1.

[0037] The drive mechanism 12 includes eight ducted propellers 121, four of which are located at the four corners of the buoyancy panel 11, and the other four are located at the four corners of the bottom of the detector body 1. The rotation axis of the four ducted propellers 121 located at the bottom of the detector body 1 forms an angle of 30-60° with the side wall of the rectangular frame supporting the detector body 1, preferably 30°.

[0038] The detector body 1 is equipped with a power electronics compartment 14, which contains a power supply and a control panel. The detector body 1 is equipped with a floating cable, and the control panel is connected to the operator's hand via the floating cable. The power electronics compartment 14 is electrically connected to multiple duct propellers 121. The detector body 1 can float in the water by relying on the buoyancy panel 11. The operator can use the operator to control the multiple duct propellers 121 individually through the power electronics compartment 14, so as to realize the forward, backward and turning movements of the detector body 1.

[0039] When the testing equipment needs to be operated to inspect the rebar configuration, the guide propeller 121 applies thrust to make the two wall-mounted plates 13 adhere to the rebar protective layer 15. At the same time, the detection frame 21 and the rebar scanner 3 also adhere to the rebar protective layer 15. At this time, the detection component 2 moves the rebar scanner 3 vertically downward, and the rebar scanner 3 can then inspect the rebar configuration within the rebar protective layer 15. By controlling the main body of the testing instrument 1 to inspect underwater structures, it avoids the inability of testing personnel to carry out on-site testing work under certain special conditions, such as when the culvert is small or located in a dangerous water flow area. This ensures accurate and rapid inspection and evaluation of underwater structures. When the guide propeller 121 applies thrust to make the two wall-mounted plates 13 adhere to the rebar protective layer 15, it can increase the friction between the main body of the testing instrument 1 and the wall, thereby preventing the main body of the testing instrument 1 from shaking due to water flow fluctuations, thus ensuring the accuracy of the rebar scanner 3.

[0040] Specifically, the detection component 2 is located between two wall panels 13. The detection component 2 includes a detection frame 21 with an opening 22 at the bottom and a rotatable cylindrical tube 23 inside. Specifically, the cylindrical tube 23 is controlled to rotate by a drive motor 27. A connection port 231 is provided at the end of the cylindrical tube 23, and one end of the chain plate 241 is connected to the connection port 231.

[0041] A guide chain mechanism 24 is wound around the cylindrical tube 23. The guide chain mechanism 24 is wound up or unwound as the cylindrical tube 23 rotates. In the unwound state, the guide chain mechanism 24 has a rigid structure.

[0042] Furthermore, the chain guide mechanism 24 includes a chain plate 241, which is formed by multiple chain links 242 hinged together in pairs. The multiple chain links 242 are limited and hinged together. A rectangular plate 243 is fixedly installed on the chain link 242. The rectangular plate 243 is located in the middle of the chain link 242. The end of the rectangular plate 243 is parallel to the end of the chain link 242. The multiple rectangular plates 243 extend in the same direction to one side of the adjacent chain link 242.

[0043] In this embodiment, the drive motor 27 is fixedly installed on one side wall inside the detection frame 21. The drive motor 27 is sealed and waterproofed. The rotation of the drive motor 27 shaft drives the cylindrical cylinder 23 to rotate. A chain link 242 is rotatably installed at the upper limit of the connection port 231 of the cylindrical cylinder 23. The first chain link 242 cooperates with the subsequent chain links 242 to be wound onto the cylindrical cylinder 23. The chain plate 241 extends from the bottom of the detection frame 21. The rotation of the cylindrical cylinder 23 can adjust the distance the chain plate 241 extends out of the detection frame 21. Before extending out of the bottom of the detection frame 21, the chain plate 241 wound by the cylindrical cylinder 23 falls onto the guide plate 26. The guide plate 26 is wider than the chain plate. When the cylindrical tube 23 rotates to release the extension of the chain plate 241, the chain plate 241 will slide relative to the end face of the guide plate 26. The inclined slope 221 and the setting of the guide plate 26 make the chain plate 241 extend obliquely from the bottom of the detection frame 21. Since the multiple chain links 242 are limited and hinged, and the rebar scanner 3 is rotatably installed at the end of the chain plate 241, the end face of the rebar scanner 3 is ensured to be in contact with the surface of the rebar protective layer 15. Furthermore, the guide plate 26 is squeezed by the elastic force of the thrust spring 42, causing multiple chain links 242 to rotate to the side of the limiting direction, so that the chain plate 241 will not bend when it extends, thereby squeezing the rebar scanner 3 to always be in contact with the wall.

[0044] Furthermore, adjacent links 242 are provided with rectangular grooves 244 that mate with the ends of rectangular plates 243. The internal shape of the rectangular grooves 244 is a conical recess, and the width of the ends of the rectangular plates 243 is equal to the width of the rectangular grooves 244.

[0045] In this embodiment, by providing rectangular plates 243 and rectangular slots 244 on the chain links 242, when multiple chain links 242 are wound onto the cylindrical tube 23, the rectangular plates 243 on one chain link 242 do not interfere with each other. When the cylindrical tube 23 rotates and causes the chain plates 241 to extend out of the bottom of the detection frame 21, after the adjacent chain links 242 come into contact with the guide plate 26, the end faces of the two chain links 242 will become parallel to each other. At this time, the end of the rectangular plate 243 on one chain link 242 will insert into the end of the rectangular plate 243 on the other chain link 242. The rectangular groove 244, with its tapered recess, makes it easier and tighter for the rectangular plate 243 to fit with the rectangular groove 244. Only after two adjacent links 242 have completed the fit between the rectangular plate 243 and the rectangular groove 244 do they extend out of the bottom of the detection frame 21. The two adjacent links 242 are interlocked to avoid gaps between them. When the chain plate 241 moves, the rebar scanner 3 shakes, ensuring the stability of the rebar scanner 3 during operation and the accuracy of its detection.

[0046] Furthermore, the opening 22 has an inclined slope 221, and a guide spring 25 is vertically fixedly installed on the inclined slope 221. The end of the guide spring 25 is fixedly connected to the guide plate 26. The end face of the guide plate 26 is parallel to the inclined slope 221, and the end face of the guide plate 26 is in contact with the side wall of multiple chain links 242.

[0047] In this embodiment, when the drive motor 27 drives the cylindrical tube 23 to rotate, the distance that the chain plate 241 extends out of the detection frame 21 increases. The chain plate 241 slides on the guide plate 26, and under the thrust of the guide spring 25, the rebar scanner 3 moves vertically downward in contact with the rebar protective layer 15 to detect the rebar configuration status. This ensures the perpendicularity of the rebar scanner 3 to the rebar protective layer 15 during electromagnetic scanning, improving the accuracy of rebar configuration detection. By driving the rebar scanner 3 to move in this way, the transmission chain plate 241 can be wound up. Compared with the method of controlling its reciprocating movement with a long rod, it occupies less space and is convenient for storage.

[0048] Furthermore, a guide groove 261 is provided on the guide plate 26, the width of which is equal to the width of the rectangular plate 243. In this embodiment, the guide groove 261 on the guide plate 26 allows the chain plate 241 to slide smoothly out of the bottom of the detection frame 21, improving the stability of the rebar scanner 3 when it moves.

[0049] Furthermore, the detection frame 21 is provided with a long plate 4, the two ends of the long plate 4 can move through the wall plate 13, and the wall plate 13 is provided with a long groove 131 for the long plate 4 to move.

[0050] A linear drive mechanism 41 is provided on the long plate 4, and a thrust spring 42 connected to the detector body 1 is provided on the side wall of the detection frame 21. Specifically, the linear drive mechanism 41 can be a servo electric cylinder, and its output end is connected to the wall plate 13 on one side.

[0051] In this embodiment, a servo cylinder is fixedly installed above the detection frame 21. The servo cylinder can drive the detection frame 21 to move left and right. After the cylindrical tube 23 releases the chain plate 241 to extend and the rebar scanner 3 completes a downward vertical detection, the servo cylinder drives the detection frame 21 to move horizontally. The cylindrical tube 23 then rewinds to move the rebar scanner 3 upward for detection. After that, the detection frame 21 moves horizontally again, and the cylindrical tube 23 releases the chain plate 241 to make the rebar scanner 3 vertically downward for detection. This step is repeated so that the rebar scanner 3 completes the detection of the large area of ​​rebar protective layer 15. The long plate 4 can move within the long groove 131. Because the detection frame 21 and the detector body 1 are connected by thrust... The spring 42 connection and the long plate 4 prevent the detection frame 21 from falling relative to the detector body 1. The detection frame 21 and the detector body 1 are elastically connected by the thrust spring 42. When the duct propeller 121 pushes the detector body 1 to make the wall plate 13, the detection frame 21 and the rebar scanner 3 fit with the rebar protective layer 15, the thrust spring 42 bends when the detection frame 21 and the rebar scanner 3 are translated, and the detector body 1 does not move relative to the wall. Therefore, when the rebar scanner 3 is moved horizontally for detection, the impact of water flow on the detector body 1 can be avoided, which will affect the detection of the rebar scanner 3 and further ensure the accuracy of the rebar scanner 3 detection.

[0052] Furthermore, it also includes a support member 5. The detection frame 21 is provided with a horizontal spring 6 connected to the support member 5. The support member 5 includes a sliding part 51 that is slidably disposed in the detection frame 21. Both ends of the sliding part 51 extend out of the detection frame 21 and are connected to the support part 52.

[0053] The support member 5 has a push plate 7 that abuts against it on one side. The push plate 7 has a circular protrusion 71. The sliding part 51 has a sliding groove 511 that matches the circular protrusion 71. The end face of the support part 52 has a rubber layer.

[0054] In this embodiment, by sliding the support member 5 on the detection frame 21, the end face of the support member 5 is located on one side of the end of the detection frame 21 under the tension of the horizontal spring 6. At this time, the circular protrusion 71 is located in the sliding groove 511. When the servo electric cylinder drives the detection frame 21 to move left and right, the push plate 7 is in contact with the side wall of the wall plate 13. When the push plate 7 moves in the horizontal direction, the circular protrusion 71 slides out from the sliding groove 511 to the side wall of the support member 5. The horizontal spring 6 is stretched, and the push plate 7 pushes the end of the support member 5 to be flush with the end of the detection frame 21. The rubber layer at the end of the support member 5 increases the friction between the detection frame 21 and the steel reinforcement protective layer 15. When the detector body 1 needs to move horizontally and the detection frame 21 is stationary relative to the wall, the support member 5 prevents the detection frame 21 from shaking, further improving the accuracy of the electromagnetic scanning of the steel reinforcement scanner 3 for the steel reinforcement protective layer 15.

[0055] Furthermore, a rubber track 8 is embedded in the end of the wall panel 13, and grooves 81 are evenly provided on the rubber track 8. A side opening 132 is provided on the wall panel 13.

[0056] The detection frame 21 is provided with a sliding plate 9, which is connected to the support member 5, and both ends of the plate 9 extend into the side opening 132.

[0057] In this embodiment, the rubber track 8 is rotatably installed inside the wall-mounted plate 13 to facilitate the vertical movement of the detector body 1. When the push plate 7 pushes the end of the support plate to move, the support plate drives the clamping plate 9 to move horizontally. After the end of the support plate is flush with the end of the detection frame 21, the clamping plate 9 engages with the clamping groove 81. At this time, the clamping plate 9 restricts the rotation of the rubber track 8 to prevent the detector body 1 from moving horizontally due to water flow fluctuations. The rubber track 8 rotates vertically, thus restricting the vertical degree of freedom of the detector body 1. Therefore, when the detector body 1 moves along the wall, the friction of the detector body 1 can be reduced, preventing the detector body 1 from vibrating due to excessive resistance. And when the detector body 1 stops moving, the stability of the detector body 1 is guaranteed.

[0058] Furthermore, two chain links 242 near the rebar scanner 3 are provided with arc-shaped plates 10, with the protruding shape of the arc-shaped plates 10 facing the connection between the two chain links 242.

[0059] In this embodiment, an arc-shaped plate 10 is provided on two chain links 242 near the rebar scanner 3. Below the arc-shaped plate 10 are three rotating connection points of the chain links 242. The distance between the three rotating connection points and the rebar scanner increases sequentially. The arc-shaped plate 10 has the highest protrusion at the middle rotating connection point, and the protrusions at the two rotating connection points gradually decrease smoothly. When the chain plate 241 is subjected to the impact force of water flow, the middle rotating connection point tends to rotate away from the rebar scanner 3. At this time, the middle rotating connection point will exert a force opposite to the impact force of water flow on the rotating connection point closest to the rebar scanner 3, further enhancing the adhesion effect between the rebar scanner 3 and the rebar protective layer 15, and ensuring the accuracy of the rebar scanner 3 detection.

[0060] Specifically, the rebar scanner 3, located at the end of the chain guide mechanism 24, is used to detect defects in underwater structures.

[0061] Working principle: When the detection equipment needs to be operated to detect the rebar configuration, the guide propeller 121 applies thrust to make the two wall plates 13 adhere to the rebar protective layer 15. At the same time, the detection frame 21 and the rebar scanner 3 also adhere to the rebar protective layer 15. When the drive motor 27 drives the cylindrical tube 23 to rotate, causing the chain plate 241 to extend out of the bottom of the detection frame 21, the chain link 242 contacts the guide plate 26, and the end faces of the two chain links 242 become parallel to each other. At this time, the end of the rectangular plate 243 on one chain link 242 will insert into the rectangular groove 244 on the other chain link 242. The conical recessed rectangular groove 244 makes it easier and tighter for the rectangular plate 243 and the rectangular groove 244 to fit together. Only after the adjacent chain links 242 have completed the fit between the rectangular plate 243 and the rectangular groove 244 do they extend out of the bottom of the detection frame 21, and the chain plate 241 slides on the guide plate 26. Under the thrust of the guide spring 25, the rebar scanner 3 moves vertically downwards and adheres to the rebar protective layer 15. When the cylindrical tube 23 releases the chain plate 241 and extends, allowing the rebar scanner 3 to complete one downward vertical detection, the servo electric cylinder drives the detection frame 21 to move horizontally. The push plate 7 adheres to the side wall of the wall plate 13 and moves horizontally. The circular protrusion 71 slides out from the sliding groove 511 to the side wall of the support plate. The horizontal spring 6 extends, and the push plate 7 pushes the end of the support plate to be flush with the end of the detection frame 21. The rubber layer at the end of the support plate increases the friction between the detection frame 21 and the rebar protective layer 15. The cylindrical tube 23 then rewinds, causing the rebar scanner 3 to move upwards for detection. After that, the detection frame 21 moves horizontally again, and the cylindrical tube 23 releases the chain plate 241, causing the rebar scanner 3 to detect vertically downwards. This step is repeated so that the rebar scanner 3 can complete the detection of a large area of ​​the rebar protective layer 15.

[0062] It should be noted that if the embodiments of the present invention involve directional indicators such as (up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0063] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An underwater structure defect detection device, characterized in that... ,include: The detector body (1) is provided with a buoyancy panel (11) and a drive mechanism (12). Two wall-mounted plates (13) are symmetrically distributed at the end of the detector body (1). The detection component (2) is disposed between the two wall plates (13). The detection component (2) includes a detection frame (21). The bottom of the detection frame (21) has an opening (22), and a rotatable cylindrical tube (23) is provided inside the detection frame (21). A guide chain mechanism (24) is wound around the cylindrical tube (23). The guide chain mechanism (24) is wound or unwound as the cylindrical tube (23) rotates. The guide chain mechanism (24) has a rigid structure in the unwound state. A rebar scanner (3) is located at the end of the chain guide mechanism (24) and is used to detect defects in underwater structures.

2. The underwater structure defect detection equipment as described in claim 1, characterized in that: The chain guide mechanism (24) includes a chain plate (241), which is formed by multiple chain links (242) hinged together in pairs. The chain links (242) are limited and hinged together. A rectangular plate (243) is fixedly installed on the chain link (242). The rectangular plate (243) is located in the middle of the chain link (242). The chain link (242) is provided with a rectangular groove (244) that cooperates with the end of the rectangular plate (243). The internal shape of the rectangular groove (244) is set as a conical recess.

3. The underwater structure defect detection equipment as described in claim 2, characterized in that: The opening (22) has an inclined slope (221), and a guide spring (25) is vertically fixed on the inclined slope (221). The end of the guide spring (25) is fixedly connected to the guide plate (26). The end face of the guide plate (26) is parallel to the inclined slope (221), and the end face of the guide plate (26) is in contact with the side wall of the multiple chain links (242).

4. The underwater structure defect detection equipment as described in claim 1, characterized in that: The detection frame (21) is provided with a long plate (4), the two ends of the long plate (4) are movably inserted through the wall plate (13), and the wall plate (13) is provided with a long groove (131) for the long plate (4) to move. The long plate (4) is provided with a linear drive mechanism (41), and the side wall of the detection frame (21) is provided with a thrust spring (42) connected to the detector body (1).

5. The underwater structure defect detection equipment as described in claim 1, characterized in that: It also includes a support member (5), and the detection frame (21) is provided with a horizontal spring (6) connected to the support member (5). The support member (5) includes a sliding part (51) that is slidably disposed in the detection frame (21). Both ends of the sliding part (51) extend out of the detection frame (21) and are connected to the support part (52). The support member (5) has a push plate (7) on one side that abuts against it. The push plate (7) has a circular protrusion (71), and the sliding part (51) has a sliding groove (511) that matches the circular protrusion (71).

6. The underwater structure defect detection equipment as described in claim 5, characterized in that: The end of the wall panel (13) is embedded with a rubber track (8), and the rubber track (8) is evenly provided with slots (81), and the wall panel (13) is provided with a side opening (132). The detection frame (21) is provided with a sliding plate (9), which is connected to the support member (5), and both ends of the plate (9) extend into the side opening (132).

7. The underwater structure defect detection equipment as described in claim 1, characterized in that: The drive mechanism (12) includes eight duct propellers (121), four of which are located at the four corners of the buoyancy panel (11), and the other four are located at the four corners of the bottom of the detector body (1). The rotation axis of the four duct propellers (121) located at the bottom of the detector body (1) forms an angle of 30-60° with the side wall of the rectangular frame supporting the detector body (1).

8. The underwater structure defect detection equipment as described in claim 2, characterized in that: Two chain links (242) near the side of the rebar scanner (3) are provided with arc-shaped plates (10), and the convex shape of the arc-shaped plates (10) is directed toward the connection of the two chain links (242).

9. The underwater structure defect detection equipment as described in claim 3, characterized in that: The guide plate (26) has a guide groove (261) with the width of the guide groove (261) being equal to the width of the rectangular plate (243).

10. The underwater structure defect detection equipment as described in claim 5, characterized in that: The end face of the support part (52) is provided with a rubber layer.

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