Steel truss bridge thick plate residual stress detection and repair integrated construction device

Abstract

The application relates to a steel truss bridge thick plate residual stress detection and repair integrated construction device, and belongs to the technical field of weld detection, which comprises a frame body, a drilling device, a strain gauge and a strain acquisition and analysis instrument are arranged on the frame body, a bearing disc is arranged on the frame body, the bearing disc slides along the vertical direction relative to the frame body, meanwhile, the bearing disc is also rotationally connected with the frame body, and the bearing disc rotates relative to the frame body; a polishing disc and a filler box are further arranged on the frame body, the polishing disc, the filler box and the drilling device are all located below the bearing disc, the polishing disc is rotationally connected with the bearing disc and rotates relative to the bearing disc; the filler box and the drilling device are fixedly connected with the bearing disc, the filler box is filled with metal filler, and a feeding pipe group for conveying the metal filler from the filler box to the outside is connected to the filler box, the application has the effect of timely plugging the residual small holes after the residual stress of the steel is detected, and the effect of repairing the steel is achieved.

Description

Technical Field

[0001] This application relates to the technical field of weld inspection, and in particular to an integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges. Background Technology

[0002] When welding thick plates of steel truss bridges, the heating and cooling processes can cause temperature differences inside the weldment, which can lead to inconsistent deformation and generate internal stress. This type of stress is called welding residual stress.

[0003] Based on whether the measurement method is destructive to the component being tested, residual stress measurement methods can be divided into destructive testing methods and non-destructive testing methods. The blind hole method, also known as the drilling method or small hole method, is a typical locally destructive measurement method. A small blind hole of a certain diameter is drilled at any point in the stress field. The stress at that point is released, the residual stress is redistributed, and the average residual stress is calculated using the stress-strain relationship.

[0004] After blind hole testing, small holes will remain on the steel plate. Workers believe that the holes are deep and the diameter is between 1 and 3 millimeters, which will not affect the use of the steel plate. However, carrying other steel repair equipment is time-consuming and laborious, and there are defects such as the holes being exposed and rainwater accumulating in the holes for a long time, which will damage the internal structure of the steel. Summary of the Invention

[0005] In order to seal the residual holes in the steel in a timely manner after the residual stress detection is completed, so as to achieve the effect of repairing the steel, this application provides an integrated construction device for residual stress detection and repair of thick plates of steel truss bridges.

[0006] The integrated construction device for detecting and repairing residual stress in thick slabs of steel truss bridges provided in this application adopts the following technical solution:

[0007] An integrated construction device for residual stress detection and repair of thick plates in steel truss bridges includes a frame, on which a drilling device, strain gauges, and a strain acquisition and analysis instrument are installed. A bearing plate is mounted on the frame, sliding vertically relative to the frame while also being rotatably connected. The bearing plate rotates relative to the frame. A grinding disc and a filler box are also mounted on the frame, all located below the bearing plate. The grinding disc is rotatably connected to the bearing plate and rotates relative to it. The filler box and drilling device are fixedly connected to the bearing plate. The filler box is filled with metal filler, and a feeding pipe assembly for conveying the metal filler from inside the filler box to the outside is connected to the filler box.

[0008] By adopting the above technical solution, the frame is moved to the location to be tested, strain gauges are attached to the testing location, and a strain acquisition and analysis instrument is connected to the strain gauges. A drilling device is then activated to drill a hole at the testing location, and the strain acquisition and analysis instrument collects and tests the residual stress data. After the residual stress test is completed, the bearing plate is rotated to move the packing box above the testing location. Metal packing is then fed into the small hole remaining at the testing location through the feeding pipe assembly. Next, the bearing plate is rotated to move the grinding disc to the small hole, and the grinding disc is rotated to grind the metal packing out of the small hole until it is smooth. This achieves the effect of promptly sealing the small hole remaining after the residual stress test of the steel, thus repairing the steel in a timely manner.

[0009] Optionally, the grinding disc, filling box, and drilling device are arranged at equal central angles on the bearing plate. The bearing plate has a first insertion hole at the top. The top of the frame is provided with a bearing plate, a rod, and a cylinder. The bearing plate is fixed on the frame and spans the bearing plate. The cylinder is fixed on the bearing plate and the piston end passes through the bearing plate and is rotatably connected to the center of the bearing plate. The bearing plate has a second insertion hole, and the rod is inserted into the first insertion hole and / or the second insertion hole.

[0010] By adopting the above technical solution, the position of the grinding disc, drilling device, or filling box can be switched by rotating the bearing disc by the same angle; inserting the insertion rod into the first insertion hole makes it easier for the operator to rotate the bearing disc; inserting the insertion rod into the first and second insertion holes can lock the bearing disc on the bearing plate and maintain the stability of the bearing disc; inserting the insertion rod into the second insertion hole facilitates the storage of the insertion rod.

[0011] Optionally, the frame is provided with an annular groove, the edges of the bearing plate are all located in the annular groove, and a spring is provided on the frame. The spring is located in the annular groove and below the edge of the bearing plate. The spring is vertically arranged, one end of the spring abuts against the bearing plate, and the other end of the spring is fixedly connected to the inner wall of the annular groove.

[0012] By adopting the above technical solution, the spring setting, in conjunction with the cylinder, can both move the bearing plate downward by a certain distance and reduce the contact area between the bearing plate and the inner wall of the ring groove, thereby reducing friction.

[0013] Optionally, the feeding tube assembly includes a first packing tube and a second packing tube. The first packing tube is located between the second packing tube and the packing box. One end of the first packing tube is rotatably connected to the packing box, and the other end is rotatably connected to the second packing tube. The rotation axis of the first packing tube is its own center line, and the center lines of the first and second packing tubes coincide. The internal channel of the first packing tube is a first slide, and the diameter of the first slide is smaller than the radius of the first packing tube. The first slide is located near the outer wall of the first packing tube. The internal channel of the second packing tube is a second slide, and the diameter of the second slide is smaller than the radius of the second packing tube. The second slide is located near the outer wall of the second packing tube. The diameters of the second slide and the first slide are the same and overlap for a period of time. The discharge port of the packing box is located at its bottom and overlaps with the top of the first slide for a period of time.

[0014] By adopting the above technical solution, the first packing tube is rotated so that the first slide is aligned with the outlet of the packing box. At this time, the metal packing in the seasoning box slides into the first slide. The second packing tube is rotated so that the second slide is aligned with the first slide. At this time, the metal packing in the first slide slides into the required packing location through the second slide. The first packing tube, the second packing tube, and the packing box achieve the sliding or blocking of the metal packing through mutual rotation and misalignment. The operation is simple and convenient.

[0015] Optionally, a groove is provided on the outer wall of the first packing tube. The groove is opened along the length of the first packing tube and opens through the end face of the first packing tube near the second packing tube. A downward pressure rod is slidably arranged on the first packing tube. The downward pressure rod is inverted L-shaped and slides in the groove. The downward pressure rod is magnetically connected to the groove wall away from the second packing tube. There is a time overlap between the groove and the second slide.

[0016] By adopting the above technical solution, after the metal filler slides into the second slide, the pressure rod slides down in the slide groove, so that the pressure rod is inserted into the second slide. The pressure rod clears the metal filler in the second slide downward, ensuring the smooth flow of the second slide.

[0017] Optionally, a grid ring is rotatably arranged inside the packing box. The grid ring is circular and has multiple grid holes, with adjacent grid holes spaced apart along the circumference of the grid ring. The discharge port of the packing box itself is vertically aligned with any of the grid holes. The rotating shaft of the first packing tube passes through the inside of the packing box. A gear and a gear ring are arranged inside the packing box. The gear ring is fixed on the rotating shaft of the first packing tube, and the gear ring is fixed on the outer circumferential wall of the grid ring. The gear and the gear ring mesh.

[0018] By adopting the above technical solution, the setting of multiple grid holes allows a single metal filler to be located in one grid hole. When the first filler tube is rotated, the first filler tube drives the grid ring to rotate through the meshing of gears and gear rings, so that a single metal filler can flow into the first filler tube through the outlet of the filler box.

[0019] Optionally, an air bladder is fixed on the top inner wall of the packing box. The air outlet of the air bladder is located directly above the discharge port of the packing box itself and is positioned opposite the grid ring. A pull rod is provided on the packing box. The pull rod is inverted L-shaped and used to squeeze the air bladder. One end of the pull rod is located above the air bladder, and the other end passes through the bottom of the packing box.

[0020] By adopting the above technical solution, pulling down the lever pressurizes the airbag, which is then compressed and sprays gas through the air outlet into the grid ring, thereby blowing the metal packing inside the grid ring into the first packing tube, ensuring the smooth discharge of the metal packing.

[0021] Optionally, the air outlet of the airbag is a constricted opening.

[0022] By adopting the above technical solution, the constricted nozzle shape can better restrict the direction of airflow.

[0023] Optionally, a positioning plate is fixed to the inner wall of the top of the stuffing box. The positioning plate is L-shaped, and the airbag is fixed on the positioning plate. The air outlet of the airbag passes through the positioning plate.

[0024] By adopting the above technical solution, the positioning plate defines the position of the air vent of the airbag, preventing the air vent from shaking. At the same time, the positioning plate can work with the pull rod to compress the airbag better.

[0025] Optionally, the airbag is provided with an air outlet pipe, which is vertically arranged. The top end of the air outlet pipe is fixedly connected to the inner wall of the top of the airbag. A through hole is opened near the top of the air outlet pipe, and the bottom end of the air outlet pipe is located at the air outlet of the airbag.

[0026] By adopting the above technical solution, when the airbag is squeezed, the bottom end of the air outlet extends out from the air outlet. At this time, the gas inside the airbag flows into the air outlet through the through hole and is ejected through the end of the air outlet. At the same time, the air outlet can also clear the metal filler inside the grid downwards, achieving two goals at once. When the squeezing is completed, the airbag returns to its original shape, and the air outlet retracts into the airbag, without affecting the rotation of the grid ring.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. After the residual stress test is completed, rotate the bearing plate to rotate the packing box above the test location. Send the metal packing through the feeding pipe assembly into the small hole at the test location. Then rotate the bearing plate to rotate the grinding plate to the small hole. Rotate the grinding plate to grind the metal packing out of the small hole flat. This achieves the effect of sealing the small hole after the residual stress test of the steel and repairing the steel in time.

[0029] 2. The metal packing can be transported to the place where packing is needed by rotating the first packing tube and the second packing tube. The operation is simple and convenient. The first packing tube, the second packing tube and the packing box achieve the sliding or blocking of the metal packing by rotating and misaligning with each other. The operation is simple and convenient.

[0030] 3. Gas is ejected from the end of the vent pipe, which also helps to clear the metal packing material inside the grille downwards, achieving two goals at once. After the compression is complete, the airbag returns to its original shape, and the vent pipe retracts into the airbag, without affecting the rotation of the grille ring. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0032] Figure 2 This is a bottom view of an embodiment of this application;

[0033] Figure 3 This is a vertical structural cross-sectional view of an embodiment of this application;

[0034] Figure 4 yes Figure 3 A magnified view of part A in the diagram.

[0035] In the diagram, 1. Frame; 11. Drilling device; 12. Strain gauge; 13. Strain acquisition and analysis instrument; 14. Bearing plate; 141. Second insertion hole; 15. Insertion rod; 16. Cylinder; 17. Ring groove; 18. Spring; 2. Bearing plate; 21. First insertion hole; 3. Grinding disc; 31. Drive motor; 32. Grinding seat; 33. Connecting rod; 34. Storage groove; 4. Filler box; 41. Grid ring; 411. Grid hole; 42. Gear ring; 43. Gear; 5. Feeding pipe assembly; 51. First filling pipe; 511. Slide groove; 512. Down pressure rod; 52. Second filling pipe; 6. Airbag; 61. Tie rod; 62. Positioning plate; 7. Air outlet pipe; 71. Through hole. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0037] This application discloses an integrated construction device for detecting and repairing residual stress in the thick slab of a steel truss bridge.

[0038] refer to Figure 1 and Figure 2 An integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges includes a frame 1. The frame 1 is equipped with a bearing plate 2, a drilling device 11, strain gauges 12, and a strain acquisition and analysis instrument 13. The bearing plate 2 is slidably connected to the frame 1 in a vertical direction and is also rotatably connected to the frame 1, rotating relative to the frame 1. The sidewalls on the top and bottom surfaces of the bearing plate 2 are flush with the sidewalls on the top and bottom surfaces of the area on the frame 1. The drilling device 11 is fixed to the bottom surface of the bearing plate 2 and drills holes in the area to be detected. The strain gauges 12 are attached to the area to be detected and connected to the strain acquisition and analysis instrument 13 after attachment. The strain acquisition and analysis instrument 13 collects and detects data and residual stress. In this application, the drilling device 11, strain gauges 12, and strain acquisition and analysis instrument 13 are all prior art and are not described in detail.

[0039] refer to Figure 1 and Figure 2 Below the support plate 2, there is also a grinding disc 3 and a filling box 4. The grinding disc 3, the filling box 4 and the drilling device 11 are arranged at equal central angles on the support plate 2. In this embodiment, the support plate 2 is divided into four equal parts. The grinding disc 3, the filling box 4 and the drilling device 11 are located on three adjacent areas respectively, and the remaining area is left empty, so that it is convenient for personnel to place their hands under the support plate 2 to perform other operations.

[0040] refer to Figure 1 and Figure 2 The top of the support plate 2 is provided with a first insertion hole 21. The top of the frame 1 is provided with a support plate 14, a rod 15 and a cylinder 16. The support plate 14 is fixed on the frame 1 and spans the support plate 2. The cylinder 16 is fixed on the support plate 14 and the piston end passes through the support plate 14 and is rotatably connected to the center of the support plate 2. The support plate 14 is provided with a second insertion hole 141. The rod 15 is inserted into the first insertion hole 21 and / or the second insertion hole 141. There are two second insertion holes 141 distributed at both ends of the support plate 14. In this embodiment, there are four first insertion holes 21, which correspond to the four equal areas of the support plate 2.

[0041] refer to Figure 3 and Figure 4The support plate 2 has a storage groove 34 on its bottom surface, with the groove opening facing downwards. The support plate 2 is equipped with a drive motor 31, a grinding seat 32, and a connecting rod 33. The drive motor 31 is fixed to the bottom of the storage groove 34, and its rotating shaft is fixedly connected to the grinding seat 32. The grinding seat 32 is located within the storage groove 34 and rotates relative to the support plate 2. One end of the connecting rod 33 is fixedly connected to the grinding seat 32, and the other end is rotatably connected to the grinding plate 3. The rotating shaft at the connection between the connecting rod 33 and the grinding plate 3 is horizontally positioned. There are two connecting rods 33, symmetrically distributed on both sides of the circumferential sidewall of the grinding plate 3, allowing the grinding plate 3 to rotate horizontally. This enables both sides of the grinding plate 3 to perform grinding functions.

[0042] refer to Figure 3 and Figure 4 The stuffing box 4 is fixed on the support plate 2. A grid ring 41 is rotatably installed inside the stuffing box 4. The grid ring 41 is circular and has multiple grid holes 411. Adjacent grid holes 411 are spaced apart along the circumference of the grid ring 41. The discharge port of the stuffing box 4 is located at the bottom of the stuffing box 4 and is vertically aligned with any grid hole 411. The grid holes 411 are filled with metal filler. A feeding pipe assembly 5 is connected to the stuffing box 4 for conveying the metal filler from inside the stuffing box 4 to the outside.

[0043] refer to Figure 3 and Figure 4 The feeding pipe assembly 5 includes a first packing pipe 51 and a second packing pipe 52. The first packing pipe 51 is located between the second packing pipe 52 and the packing box 4. One end of the first packing pipe 51 is rotatably connected to the packing box 4, and the other end is rotatably connected to the second packing pipe 52. The rotation axis of the first packing pipe 51 is its own center line, and the center lines of the first packing pipe 51 and the second packing pipe 52 coincide. The rotation axis of the first packing pipe 51 rotatably connected to the packing box 4 extends into the interior of the packing box 4. A gear 43 and a gear ring 42 are provided inside the packing box 4. The gear ring 42 is fixed around the outer circumference of the grid ring 41. The gear 43 is ringed around the rotation axis of the first packing pipe 51 rotatably connected to the packing box 4. The gear 43 and the gear ring 42 mesh. When the first packing pipe 51 is rotated, the gear 43 drives the grid ring 41 to rotate through the gear ring 42.

[0044] refer to Figure 3 and Figure 4The stuffing box 4 also contains an airbag 6, a pull rod 61, and a positioning plate 62. The positioning plate 62 is L-shaped and fixed to the inner top wall of the stuffing box 4. The airbag 6 is fixed to the positioning plate 62, with its own air outlet facing downwards and constricted. The air outlet of the airbag 6 passes through the positioning plate 62. The pull rod 61 is an inverted L-shape, with one end above the airbag 6 and the other end passing through the bottom of the stuffing box 4 and located outside the stuffing box 4. Pulling the pull rod 61 downwards compresses the airbag 6 in conjunction with the positioning plate 62. An air outlet pipe 7 is provided inside the airbag 6. The air outlet pipe 7 is vertically arranged, with its top end fixedly connected to the inner top wall of the airbag 6. A through hole 71 is opened near the top of the air outlet pipe 7, and the bottom end of the air outlet pipe 7 is located at the air outlet of the airbag 6.

[0045] refer to Figure 3 and Figure 4 The first packing tube 51 has an internal channel that is a first slide, and the diameter of the first slide is smaller than the radius of the first packing tube 51. The first slide is located near the outer wall of the first packing tube 51. The second packing tube 52 has an internal channel that is a second slide, and the diameter of the second slide is smaller than the radius of the second packing tube 52. The second slide is located near the outer wall of the second packing tube 52. The diameters of the second slide and the first slide are the same and overlap for a period of time. The discharge port of the packing box 4 is located at its bottom and overlaps with the top of the first slide for a period of time. The length of the first packing tube 51 is greater than the length of the second packing tube 52.

[0046] refer to Figure 3 and Figure 4 A groove 511 is provided on the outer wall of the first packing tube 51. The groove 511 is opened along the length of the first packing tube 51 and opens through the end face of the first packing tube 51 near the second packing tube 52. A downward pressure rod 512 is slidably arranged on the first packing tube 51. The downward pressure rod 512 is inverted L-shaped and slides in the groove 511. The downward pressure rod 512 is magnetically connected to the groove wall of the groove 511 away from the second packing tube 52. A magnet can be embedded and fixed in the downward pressure rod 512. Similarly, a magnet is embedded and fixed in the inner wall of the groove 511. The magnet and the magnet attract each other magnetically, thereby realizing the magnetic connection between the downward pressure rod 512 and the inner wall of the groove 511. The groove 511 and the second slide have an overlap time period.

[0047] refer to Figure 3 and Figure 4 The frame 1 has an annular groove 17, and the edges of the bearing plate 2 are all located in the annular groove 17. The frame 1 is provided with a spring 18, which is located in the annular groove 17 and below the edge of the bearing plate 2. The spring 18 is vertically set, with one end of the spring 18 abutting against the bearing plate 2 and the other end of the spring 18 fixedly connected to the inner wall of the annular groove 17.

[0048] The implementation principle of the integrated construction device for residual stress detection and repair of thick steel truss bridge plates in this application embodiment is as follows: The frame 1 is moved to the location to be tested. Strain gauges 12 are attached to the testing location. A strain acquisition and analysis instrument 13 is connected to the strain gauges 12. The drilling device 11 is started to drill a hole at the testing location. The strain acquisition and analysis instrument 13 collects and detects residual stress data. After the residual stress detection is completed, the bearing plate 2 is rotated, and the filling box 4 is rotated above the testing location. Metal filler is sent to the small hole remaining at the testing location through the feeding pipe group 5. Then, the bearing plate 2 is rotated to rotate the grinding disc 3 to the small hole. The grinding disc 3 is rotated to grind the metal filler out of the small hole flat, achieving the effect of timely sealing of the small hole remaining after the residual stress detection of the steel, and timely repair of the steel.

[0049] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges, comprising a frame (1), on which a drilling device (11), strain gauges (12), and a strain acquisition and analysis instrument (13) are installed, characterized in that: The frame (1) is provided with a bearing plate (2), which slides vertically relative to the frame (1) and is also rotatably connected to the frame (1). The bearing plate (2) rotates relative to the frame (1). The frame (1) is also provided with a grinding disc (3) and a stuffing box (4). The grinding disc (3), the stuffing box (4) and the drilling device (11) are all located below the bearing plate (2). The grinding disc (3) is rotatably connected to the bearing plate (2) and rotates relative to the bearing plate (2). The stuffing box (4) and the drilling device (11) are both fixed to the bearing plate (2). The filling box (4) is filled with metal filler, and a feeding pipe assembly (5) for conveying the metal filler from inside the filling box (4) to the outside is connected to the filling box (4); the feeding pipe assembly (5) includes a first filling pipe (51) and a second filling pipe (52). The first filling pipe (51) is located between the second filling pipe (52) and the filling box (4). One end of the first filling pipe (51) is rotatably connected to the filling box (4), and the other end is rotatably connected to the second filling pipe (52). The rotation axis of the first filling pipe (51) is its own center line. The first filling pipe (51) and the second filling pipe (52) are connected. 2) The centerlines of the two coincide; the internal channel of the first packing tube (51) is the first slide and the diameter of the first slide is smaller than the radius of the first packing tube (51), and the first slide is located near the outer wall of the first packing tube (51); the internal channel of the second packing tube (52) is the second slide and the diameter of the second slide is smaller than the radius of the second packing tube (52), and the second slide is located near the outer wall of the second packing tube (52). The diameters of the second slide and the first slide are the same and there is an overlap period. The outlet of the packing box (4) is located at its bottom and there is an overlap with the top of the first slide. The first packing tube (51) has a groove (511) on its outer wall. The groove (511) is opened along the length of the first packing tube (51) and opens through the end face of the first packing tube (51) near the second packing tube (52). A pressure rod (512) is slidably arranged on the first packing tube (51). The pressure rod (512) is an inverted L-shape. The pressure rod (512) slides in the groove (511). The pressure rod (512) is magnetically connected to the groove wall of the groove (511) away from the second packing tube (52). The groove (511) and the second slide have an overlapping time period.

2. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 1, characterized in that: The grinding disc (3), the filling box (4) and the drilling device (11) are arranged at equal central angles on the bearing plate (2). The bearing plate (2) has a first insertion hole (21) on its top. The frame (1) is provided with a bearing plate (14), a rod (15) and a cylinder (16) on its top. The bearing plate (14) is fixed on the frame (1) and spans the bearing plate (2). The cylinder (16) is fixed on the bearing plate (14) and its piston end passes through the bearing plate (14) and is rotatably connected to the center of the bearing plate (2). The bearing plate (14) has a second insertion hole (141) on its top. The rod (15) is inserted into the first insertion hole (21) and / or the second insertion hole (141).

3. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 2, characterized in that: The frame (1) has an annular groove (17) and the edges of the bearing plate (2) are all located in the annular groove (17). A spring (18) is provided on the frame (1). The spring (18) is located in the annular groove (17) and below the edge of the bearing plate (2). The spring (18) is vertically set. One end of the spring (18) abuts against the bearing plate (2) and the other end of the spring (18) is fixedly connected to the inner wall of the annular groove (17).

4. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 1, characterized in that: A grid ring (41) is rotatably arranged inside the packing box (4). The grid ring (41) is circular and has multiple grid holes (411) on it. Adjacent grid holes (411) are spaced apart along the circumference of the grid ring (41). The discharge port of the packing box (4) is vertically aligned with any grid hole (411). The rotating shaft of the first packing tube (51) passes through the inside of the packing box (4). A gear (43) and a gear ring (42) are arranged inside the packing box. The gear (43) is ring-fixed on the rotating shaft of the first packing tube (51), and the gear ring (42) is ring-fixed on the outer circumferential wall of the grid ring (41). The gear (43) and the gear ring (42) mesh.

5. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 4, characterized in that: An air bladder (6) is fixed on the top inner wall of the packing box (4). The air outlet of the air bladder (6) is located directly above the discharge port of the packing box (4) and directly opposite the grid ring (41). A pull rod (61) is provided on the packing box (4). The pull rod (61) is an inverted L-shape used to squeeze the air bladder (6). One end of the pull rod (61) is located above the air bladder (6), and the other end passes through the bottom of the packing box (4).

6. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 5, characterized in that: The air outlet of the airbag (6) is constricted.

7. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 6, characterized in that: The top inner wall of the stuffing box (4) is fixed with a positioning plate (62), which is L-shaped. The air bag (6) is fixed on the positioning plate (62), and the air outlet of the air bag (6) passes through the positioning plate (62).

8. The integrated construction device for detecting and repairing residual stress in thick plates of steel truss bridges according to claim 7, characterized in that: An air outlet pipe (7) is provided inside the airbag (6). The air outlet pipe (7) is vertically arranged. The top end of the air outlet pipe (7) is fixedly connected to the inner wall of the top of the airbag (6). A through hole (71) is opened near the top of the air outlet pipe (7). The bottom end of the air outlet pipe (7) is located at the air outlet of the airbag (6).

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