A shield tunnel lining crack detector

Abstract

The utility model discloses a shield tunnel lining crack detector relates to crack detection technical field, include: mobile seat, the top of mobile seat is provided with swing subassembly, and swing subassembly includes mounting panel. The utility model drives the screw rod to rotate through servo motor, to make the connecting block in two displacement spare respectively along the screw rod or connecting rod move, and then make V type strip drive dust removal strip move and wipe dust on glass protection cover top, until connecting block removes to the corresponding place of inclined plane block, after the inclined plane block contact corresponding inclined plane alignment strip, will push inclined plane alignment strip and hollow sliding column and move, and hollow sliding column and connecting block between relative sliding and extrude spring, and this hollow sliding column moves through support plate and drives connecting shell, and makes connecting shell drive gear and lower tooth rack or upper tooth rack correspond, when gear passes -through will drive rotating roller to rotate and wind used dust removal strip, guarantees that detection head is not covered by dust, to keep the accuracy of detection.

Description

Technical Field

[0001] This utility model relates to the field of crack detection technology, specifically to a crack detector for shield tunnel lining. Background Technology

[0002] A shield tunnel is an underground construction tunnel formed by excavating underground using a "shield tunneling machine". Its core idea is to use a specialized shield machine to advance in the soil while the tunnel structure is gradually lined behind it, reducing the impact of collapse and surface subsidence on the surrounding environment. For the safety and structural integrity of shield tunnels, lining crack detection is required. Lining cracks are signs of decreased load-bearing capacity, local damage, or material fatigue. Lining crack detection can detect and assess the expansion trend of cracks in advance, which helps to avoid sudden damage (such as large-scale crack expansion and collapse risk).

[0003] A document with publication number CN120539178A discloses a precision detector for tunnel lining cracks, relating to the field of tunnel inspection. It includes a base and wheels mounted below the base. A connecting seat is located above the base, and a support block is fixed above the connecting seat. A mounting base is connected above the support block, and a crack detection mechanism is mounted above the mounting base to detect cracks in the tunnel lining. A rotating mechanism is located on the outer side of the connecting seat, controlling the rotation of the connecting seat to adjust the detection position. An extension mechanism is located above the base for storage. This precision detector for tunnel lining cracks allows the base to move within the tunnel via the wheels. The support block provides support for the mounting base, and the rotating support block drives the crack detection mechanism on the mounting base to move in an arc shape, detecting cracks on the curved surface of the tunnel. This increases the crack detection range of the device and, in conjunction with the movement of the base, enables efficient tunnel inspection.

[0004] The aforementioned shield tunnel lining crack detector is susceptible to sensor performance degradation due to underground dust during use, and dust covering the detection head and industrial camera can affect the accuracy of the detection. Utility Model Content

[0005] The purpose of this invention is to provide a shield tunnel lining crack detector that solves the problem that underground dust covering the detection head and industrial camera affects the accuracy of traditional shield tunnel lining crack detectors during use.

[0006] This utility model solves the above-mentioned technical problems through the following technical solution: a shield tunnel lining crack detector, comprising: A movable base, the top of which is provided with a swing assembly, the swing assembly including a mounting plate, the top of which is provided with a detection mechanism, and the top of which has two grooves. A dust removal assembly is disposed on the top of the mounting plate. The dust removal assembly includes a glass protective cover fixed to the top of the mounting plate, a lead screw rotating inside one of the grooves, a connecting rod fixed inside the other groove, and a servo motor fixed to one side of the mounting plate. One end of the output shaft of the servo motor is fixedly connected to one end of the lead screw. Displacement components are provided on the outside of the lead screw and the outside of the connecting rod, and a dust removal component is provided between the two displacement components. The dust removal component is used to wipe and clean the dust on the top of the glass protective cover.

[0007] Preferably, the displacement component includes a connecting block and an inclined block fixed to the top of the mounting plate. A hollow sliding column slides on the connecting block, and a spring is fixed to the inner side wall of the hollow sliding column. One end of the spring is fixed to the connecting block. An inclined positioning strip is fixed to the bottom of the hollow sliding column, and a support plate is fixed to the top of the hollow sliding column.

[0008] Preferably, the dust removal component includes a connecting shell fixed to the top of the support plate, a V-shaped strip fixed to the bottom of the connecting shell, a cover plate hinged to the top of the connecting shell, a rotating roller rotatably mounted on the inner side of the connecting shell, two rotating seats rotatably mounted on the connecting shell, a take-up roller disposed between the two rotating seats, a dust removal strip disposed between the take-up roller and the rotating roller, the dust removal strip extending to the outer side of the connecting shell and passing through the V-shaped strip to connect to the rotating roller.

[0009] Preferably, both rotating seats are threaded with screws, and both ends of the take-up roller are provided with threaded holes.

[0010] Preferably, both ends of the rotating roller extend to the outside of the connecting shell and are fixed with gears. Each of the two gears is fixed with an elastic ball. The outer surface of the connecting shell has two slots. The dust removal component also includes an upper tooth bracket and a lower tooth bracket fixed to the top of the mounting plate.

[0011] Preferably, the detection mechanism includes an industrial camera, a supplementary light, and a detection head mounted on the top of the mounting plate.

[0012] Preferably, the swing assembly further includes a support frame fixed to the top of the movable seat, a support column rotatably mounted on the support frame, one end of the support column being fixed to the bottom of the mounting plate, a groove being provided on the support column, a through rod passing through the inner side of the groove, a variable frequency motor being fixed on the support frame, and one end of the output shaft of the variable frequency motor being fixedly connected to one end of the through rod via a disc.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: A servo motor drives a lead screw to rotate, causing the connecting blocks in the two displacement components to move along the lead screw or connecting rod respectively. This causes the V-shaped strip to move and wipe the dust off the top of the glass protective cover until the connecting block moves to the corresponding position of the inclined block. After the inclined block contacts the corresponding inclined alignment strip, it pushes the inclined alignment strip and the hollow sliding column to move. The hollow sliding column slides relative to the connecting block and compresses the spring. The hollow sliding column drives the connecting shell to move through the support plate, causing the connecting shell to drive the gear and the lower or upper toothed bracket to align. When the gear passes by, it drives the rotating roller to rotate and rewind the used dust removal strip, ensuring that the detection head is not covered by dust and maintaining the accuracy of the detection. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram showing the disassembled parts of this utility model; Figure 3 This is an exploded sectional view of the dust removal component in this utility model; Figure 4 for Figure 3 Enlarged diagram of section A in the middle; Figure 5 This is a partially exploded sectional view of the dust removal component in this utility model; Figure 6 for Figure 5 Enlarged schematic diagram of section B.

[0015] The numbers in the image represent: 1. Movable base; 2. Swing assembly; 21. Mounting plate; 22. Groove; 23. Support frame; 24. Support column; 25. Slot; 26. Through rod; 27. Variable frequency motor; 3. Dust cleaning assembly; 31. Glass protective cover; 32. Lead screw; 33. Connecting rod; 34. Servo motor; 35. Connecting block; 36. Inclined block; 37. Hollow sliding column; 38. Spring; 39. Inclined alignment bar; 310. Support 311. Plate; 312. Connecting shell; 313. V-shaped strip; 314. Cover plate; 315. Rotating roller; 316. Rotating seat; 317. Rewinding roller; 318. Dust removal strip; 319. Screw; 320. Threaded hole; 321. Gear; 322. Elastic ball; 323. Slot; 324. Upper toothed bracket; 325. Lower toothed bracket; 4. Detection mechanism; 41. Industrial camera; 42. Fill light; 43. Detection head. Detailed Implementation

[0016] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0017] This embodiment provides a technical solution: a crack detector for shield tunnel lining, such as... Figures 1-6As shown, the assembly includes a movable base 1, a swing assembly 2 mounted on top of the movable base 1, and a dust removal assembly. The bottom of the movable base 1 is equipped with electric casters. Since the working principle and wiring method of the electric casters are existing technology and common knowledge to those skilled in the art, they will not be described in detail here. The swing assembly 2 includes a mounting plate 21 and a support frame 23 fixed to the top of the movable base 1. A support column 24 rotates on the support frame 23. One end of the support column 24 is fixed to the bottom of the mounting plate 21 to support the mounting plate 21. A groove 25 is provided on the support column 24, and a through rod 26 passes through the inner side of the groove 25. A variable frequency motor 27 is fixed on the support frame 23 through a connecting frame. One end of the output shaft of the variable frequency motor 27 is fixedly connected to one end of the through rod 26 through a disc. Two corresponding grooves 22 are provided on the top of the mounting plate 21.

[0018] The top of the mounting plate 21 is provided with a detection mechanism 4. The detection mechanism 4 includes an industrial camera 41, a fill light 42 and a detection head 43, which are located on the top of the mounting plate 21. The fill light 42 surrounds the industrial camera 41 and the detection head 43 and is used to provide illumination for the shooting environment of the industrial camera 41.

[0019] The dust removal assembly 3 is located on the top of the mounting plate 21. The dust removal assembly 3 includes a glass protective cover 31 fixed to the top of the mounting plate 21, a lead screw 32 rotating inside one of the grooves 22, a connecting rod 33 fixed inside the other groove 22, and a servo motor 34 fixed to one side of the mounting plate 21. One end of the output shaft of the servo motor 34 is fixedly connected to one end of the lead screw 32. The glass protective cover 31 covers the outside of the detection mechanism 4 to prevent dust in the detection environment from falling on the industrial camera 41 and the detection head 43 and affecting the accuracy of the detection results.

[0020] Displacement components are provided on the exterior of both the lead screw 32 and the connecting rod 33. A dust-cleaning component is provided between the two displacement components. The dust-cleaning component is used to wipe and clean the dust on the top of the glass protective cover 31 to prevent dust from reducing the clarity of the glass protective cover 31. The displacement component includes a connecting block 35 and an inclined block 36 fixed to the top of the mounting plate 21. The connecting block 35 in the displacement component located on the exterior of the lead screw 32 is threadedly connected to the lead screw 32. The connecting block 35 in the displacement component located on the connecting rod 33 slides on the connecting rod 33. Furthermore, the inclined blocks 36 in the two displacement components are arranged one on the left and one on the right, and the inclined surfaces and orientations of the two inclined blocks 36 are arranged opposite to each other. A hollow sliding column 37 slides on the connecting block 35. A spring 38 is fixed to the inner side wall of the hollow sliding column 37. One end of the spring 38 is fixed to the connecting block 35. An inclined alignment strip 39 is fixed to the bottom of the hollow sliding column 37. The inclined surfaces and orientations of the inclined alignment strip 39 on the hollow sliding column 37 in the two displacement components are arranged opposite to each other. A support plate 310 is fixed to the top of the hollow sliding column 37.

[0021] The dust removal component includes a connecting shell 311 fixed to the top of the support plate 310. A V-shaped strip 312 is fixed to the bottom of the connecting shell 311. Two through slots are opened at the bottom of the connecting shell 311, and the two through slots are respectively located on both sides of the two V-shaped strips 312. A cover plate 313 is hinged to the top of the connecting shell 311. A rotating roller 314 rotates inside the connecting shell 311. Two rotating seats 315 rotate on the connecting shell 311. A take-up roller 316 is arranged between the two rotating seats 315. The take-up roller 316 and the rotating roller 314 are opposite each other and on the same horizontal plane. A dust removal strip 317 is arranged between the take-up roller 316 and the rotating roller 314. The dust removal strip 317 can be made of cotton cloth or dust-soaked cloth. The dust removal strip 317 passes through one of the through slots to the outside of the connecting shell 311, and extends through the bottom of the V-shaped strips 312 and the other through slot to the inside of the connecting shell 311. One side of it can be connected to the rotating roller 314 with tape.

[0022] Both rotating seats 315 are threaded with screws 318. Both ends of the take-up roller 316 are provided with threaded holes 319 with an inner diameter that matches the diameter of the screws 318. Both ends of the rotating roller 314 extend to the outside of the connecting shell 311 and are fixed with gears 320. Both gears 320 are fixed with elastic balls 321. The outer surface of the connecting shell 311 is provided with two slots 322. The dust removal component also includes an upper toothed bracket 323 and a lower toothed bracket 324 fixed to the top of the mounting plate 21. The upper toothed bracket 323 and the lower toothed bracket 324 are respectively arranged on both sides of the mounting plate 21. The upper toothed bracket 323 and the lower toothed bracket 324 are respectively on the same vertical plane as the two gears 320. The upper toothed bracket 323 is above one gear 320 and the lower toothed bracket 324 is below one gear 320.

[0023] In use: The electric moving wheels move the moving seat 1 along the shield tunnel. The variable frequency motor 27 is started to drive the disc to rotate. The disc drives the through rod 26 to make a circular motion. When the through rod 26 moves in a circular motion, it will slide in the groove 25 and drive the support column 24 to swing left and right at the rotating connection point. The support column 24 drives the mounting plate 21 to swing left and right. The swinging of the mounting plate 21 will drive the industrial camera 41 and the detection head 43 to swing. The detection head 43 will detect different detection positions on the inner wall of the shield tunnel. The industrial camera 41 will capture and record the detection positions in the shield tunnel. The supplementary light 42 provides illumination for the detection environment.

[0024] During testing, the servo motor 34 can be periodically activated, driving the lead screw 32 to rotate. The rotation of the lead screw 32 causes the connecting block 35 outside the lead screw 32 to move along it. This connecting block 35, through a dust removal component, drives another connecting block 35 in a displacement component to slide on the connecting rod 33. This, in turn, causes the connecting shell 311 in the dust removal component to move along the top of the glass protective cover 31. During this movement, the V-shaped strip 312 drives the dust removal strip 317 to move on the top of the glass protective cover 31, wiping away the dust until the connecting block 35 moves to the corresponding position on the inclined block 36. After the inclined block 36 contacts the inclined alignment strip 39 on the connecting block 35, it pushes the inclined alignment strip 39 and the hollow sliding column 37 to move under the sliding contact of the inclined surface. The hollow sliding column 37 then slides relative to the connecting block 35 and compresses the spring 38. The hollow sliding column 37, through the support plate 310 above it, drives the connecting shell 311 to... When another displacement component moves, the movement of the connecting shell 311 causes the gear 320 to move, and the gear 320 is driven to the position corresponding to the lower tooth bracket 324 or the upper tooth bracket 323. Subsequently, as the connecting block 35 and the connecting shell 311 continue to move, the gear 320 will pass over the lower tooth bracket 324 or the upper tooth bracket 323, and the gear 320 will rotate through the meshing teeth, thereby causing the rotating roller 314 to rotate at a certain angle, and the used cleaning strip 317 will be wound onto the rotating roller 314. The clean cleaning strip 317 on the winding roller 316 will be pulled onto the V-shaped strip 312 for use. After the connecting block 35 moves past the inclined block 36, the connecting shell 311 and the hollow sliding column 37 will be reset by the elastic force of the spring 38, so as to avoid the cleaning component being affected by the lower tooth bracket 324 or the upper tooth bracket 323 when it moves in the opposite direction. After moving to the next inclined block 36, the above work can be repeated.

[0025] If the cleaning strip 317 is used up later, open the cover plate 313, rotate the screw 318 until the screw 318 moves out of the threaded hole 319, and the take-up roller 316 can be removed. Insert the two rotating seats 315 at both ends of the new take-up roller 316 with the cleaning strip 317 wound on it, and insert the screw 318 into the corresponding threaded hole 319 to complete the installation of the take-up roller 316. Then, pass one side of the cleaning strip 317 through one of the through slots to the outside of the connecting shell 311, and pass through the bottom of the V-shaped strip 312 and the other through slot to the inside of the connecting shell 311. One side of it can be connected to the rotating roller 314 with tape and then put into use.

[0026] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. A crack detector for shield tunnel lining, characterized in that, include: A movable seat (1) is provided with a swing assembly (2) on its top. The swing assembly (2) includes a mounting plate (21). A detection mechanism (4) is provided on the top of the mounting plate (21). Two grooves (22) are provided on the top of the mounting plate (21). Dust cleaning assembly (3), the dust cleaning assembly (3) is disposed on the top of the mounting plate (21), the dust cleaning assembly (3) includes a glass protective cover (31) fixed to the top of the mounting plate (21), a lead screw (32) rotating inside one of the grooves (22), a connecting rod (33) fixed inside the other groove (22), and a servo motor (34) fixed to one side of the mounting plate (21). One end of the output shaft of the servo motor (34) is fixedly connected to one end of the lead screw (32); Displacement components are provided on the outside of the lead screw (32) and the outside of the connecting rod (33), and a dust removal component is provided between the two displacement components. The dust removal component is used to wipe and clean the dust on the top of the glass protective cover (31).

2. The shield tunnel lining crack detector as described in claim 1, characterized in that, The displacement component includes a connecting block (35) and an inclined block (36) fixed to the top of the mounting plate (21). A hollow sliding column (37) slides on the connecting block (35). A spring (38) is fixed to the inner side wall of the hollow sliding column (37). One end of the spring (38) is fixed to the connecting block (35). An inclined positioning strip (39) is fixed to the bottom of the hollow sliding column (37). A support plate (310) is fixed to the top of the hollow sliding column (37).

3. The shield tunnel lining crack detector as described in claim 2, characterized in that, The dust removal component includes a connecting shell (311) fixed to the top of the support plate (310), a V-shaped strip (312) fixed to the bottom of the connecting shell (311), a cover plate (313) hinged to the top of the connecting shell (311), a rotating roller (314) rotating inside the connecting shell (311), two rotating seats (315) rotating on the connecting shell (311), a winding roller (316) arranged between the two rotating seats (315), a dust removal strip (317) arranged between the winding roller (316) and the rotating roller (314), the dust removal strip (317) extending to the outside of the connecting shell (311) and passing through the V-shaped strip (312) to connect to the rotating roller (314).

4. The shield tunnel lining crack detector as described in claim 3, characterized in that, Both rotating seats (315) are threaded with screws (318), and both ends of the take-up roller (316) are provided with threaded holes (319).

5. The shield tunnel lining crack detector as described in claim 4, characterized in that, Both ends of the rotating roller (314) extend to the outside of the connecting shell (311) and are fixed with gears (320). Each of the two gears (320) is fixed with an elastic ball (321). The outer surface of the connecting shell (311) has two slots (322). The dust removal component also includes an upper tooth bracket (323) and a lower tooth bracket (324) fixed to the top of the mounting plate (21).

6. The shield tunnel lining crack detector as described in claim 1, characterized in that, The detection mechanism (4) includes an industrial camera (41), a fill light (42), and a detection head (43) mounted on the top of the mounting plate (21).

7. The shield tunnel lining crack detector as described in claim 1, characterized in that, The swing assembly (2) also includes a support frame (23) fixed to the top of the movable seat (1). A support column (24) is rotatably mounted on the support frame (23). One end of the support column (24) is fixed to the bottom of the mounting plate (21). A groove (25) is provided on the support column (24). A through rod (26) is passed through the inner side of the groove (25). A variable frequency motor (27) is fixed on the support frame (23). One end of the output shaft of the variable frequency motor (27) is fixedly connected to one end of the through rod (26) through a disc.

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