Bridge crack detection device and method

Abstract

The invention discloses a bridge crack detection device and method.According to the device, a first moving seat is driven to transversely and horizontally move, the first moving seat enables a detector body to transversely and horizontally move through a mounting sleeve, a second moving seat is driven to longitudinally and horizontally move, and the second moving seat enables the detector body to longitudinally move through a transverse plate and the mounting sleeve; therefore, transverse and longitudinal movement of the detector body is conveniently achieved, detection of the lower surface of the bridge is completed through transverse and longitudinal movement of the detector body, the convenience of detection of the lower surface of the bridge is effectively improved, meanwhile, compared with the prior art, detection is conducted through a hanging basket and manual work, and the detection efficiency is improved. Injury of detection personnel caused by falling of the hanging basket is avoided, and safety of bridge lower surface detection operation is improved.

Description

Technical Field

[0001] This invention belongs to the field of bridge inspection technology, and in particular relates to a bridge crack detection device and method. Background Technology

[0002] Currently, bridge inspections mostly involve using cranes to lift a basket, with inspectors standing inside to inspect the lower surface of the bridge. However, when the basket tilts due to the counterweight, it can easily cause safety accidents. At the same time, manually inspecting the lower surface of the bridge is inconvenient. To address these issues, the inventor proposes a bridge inspection counterweight mechanism and a bridge inspection device.

[0003] Patent application CN117684451A discloses an adjustable crack detection device for the underside of bridges. By mounting the device across the guardrail on the side of the bridge and using a detection rod to move a camera back and forth, the device can detect cracks on the underside of the bridge without obstructing traffic or affecting other vehicles. However, this mounting is designed for fixing the camera and lacks a structure for fixing other detection instruments, thus limiting its versatility in detection capabilities.

[0004] Patent application CN211897840U discloses a bridge inspection counterweight mechanism and a bridge inspection device, which performs non-destructive testing on the bottom of a bridge using a bridge inspection instrument. By setting up a hinged seat, a hinged pin, and a linear sliding mechanism, the hinged seat is installed at the bottom of a vertical rod. A support plate rotates relative to the hinged seat via the hinged pin and rotates around the hinged pin as a fulcrum under the drive of a servo motor. This allows the bridge inspection instrument to rotate to the entire area under the bridge for inspection. The linear sliding mechanism allows the bridge inspection instrument to slide on the support plate, enabling inspection at different locations on the bridge's bottom surface. However, this device includes a counterweight vehicle, which needs to be installed on the bridge deck, making it impossible to perform inspections under the bridge. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a bridge crack detection device and method.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a bridge crack detection device, comprising a frame plate, a horizontal plate, a mounting sleeve, a detector body, a lateral moving mechanism and a longitudinal moving mechanism. A horizontal plate is provided on one side of the frame plate, and a mounting sleeve is provided on the upper surface of the horizontal plate. The detector body is detachably installed inside the mounting sleeve. A lateral moving mechanism is provided between the horizontal plate and the mounting sleeve, and a longitudinal moving mechanism is provided between the frame plate and the horizontal plate.

[0008] Preferably, the lateral movement mechanism includes a reciprocating lead screw, a first through groove is formed on the upper surface of the horizontal plate, one end of the reciprocating lead screw is rotatably connected to the inner wall of the first through groove, a first movable seat is provided on the upper surface of the horizontal plate, two first guide grooves are formed on the upper surface of the horizontal plate, a first guide block is slidably connected to the inner wall of each of the two first guide grooves, the upper surface of the two first guide blocks is fixedly connected to the lower surface of the first movable seat, a synchronizing rod is fixedly installed on the inner wall of the first movable seat, a connecting block is rotatably installed at the end of the synchronizing rod away from the first movable seat, and the connecting block is in active contact with the thread groove of the reciprocating lead screw.

[0009] Preferably, a second through groove is provided on the upper surface of the cross plate, a first rotating rod is rotatably installed on the inner wall of the second through groove, one end of the first rotating rod is fixedly connected to one end of the reciprocating screw, a first motor is fixedly installed on the inner wall of the second through groove, and the drive output end of the first motor is fixedly connected to one end of the first rotating rod.

[0010] Preferably, a first fixing block is fixedly connected to the end of the first motor away from the first rotating rod, and the side of the first fixing block away from the first motor is fixedly connected to the inner wall of the second through groove. The first motor is fixed in the second through groove by the first fixing block.

[0011] Preferably, the longitudinal moving mechanism includes a second movable seat, one side of which is fixedly connected to one side of the cross plate. A strip groove is formed on the inner wall of the second movable seat. Two second guide grooves are formed on one side of the frame plate. A second guide block is slidably connected to the inner wall of each of the two second guide grooves. One side of each of the two second guide blocks is fixedly connected to one side of the second movable seat. Two second rotating rods are rotatably mounted on one side of the frame plate. A transmission wheel is fixedly mounted at one end of each of the two second rotating rods. A transmission belt is drivingly connected between the two transmission wheels. A movable block is fixedly mounted on the outer wall of the transmission belt. A drive rod is fixedly mounted on one side of the movable block. The end of the drive rod away from the movable block is in movable contact with the inner wall of the strip groove.

[0012] Preferably, the frame plate is fixedly connected to both the upper and lower surfaces with mounting ears, the mounting ears are provided with mounting holes, the surface of the mounting sleeve is provided with a limiting component, and the interior of the mounting sleeve is provided with a disassembly and assembly mechanism for disassembling and assembling the main body of the detector.

[0013] Preferably, the limiting assembly includes two limiting plates, with rubber pads fixedly installed on the upper surfaces of both limiting plates, and telescopic rods fixedly installed on the upper surfaces of both base plates. The piston ends of the telescopic rods are fixedly connected to the lower surfaces of the limiting plates, and telescopic springs are movably sleeved on the outer walls of both telescopic rods. One end of the telescopic spring is fixedly connected to the upper surface of the base plate, and the end of the telescopic spring away from the base plate is fixedly connected to the lower surface of the limiting plate.

[0014] Preferably, the disassembly and assembly mechanism includes a fixed plate and guide rods. The fixed plate is in movable contact with the inner wall of the mounting sleeve and the fixed plate is in movable contact with the outer wall of the detector body. The guide rods are evenly distributed and installed on the inner wall of the mounting sleeve. The piston ends of two adjacent guide rods are fixedly connected to the outer wall of a fixed plate. Threaded rods are threadedly installed on both sides of the mounting sleeve, and one end of the threaded rod is rotatably connected to the outer wall of the fixed plate.

[0015] Preferably, the inner wall of the fixing plate is fixedly installed with a protective pad, the inner wall of the protective pad is in movable contact with the outer wall of the detector body, and the fixing plate can fix the detector body through the protective pad. The end of the threaded rod away from the fixing plate is fixedly installed with a handle.

[0016] The bridge crack detection method of the aforementioned detection device includes the following steps:

[0017] S1: When it is necessary to inspect the lower surface of the bridge, first place the instrument body inside the mounting sleeve, and fix the frame plate on the boom of the crane through multiple mounting holes. When the boom of the crane lifts the frame plate, the upper surface of the horizontal plate and the lower surface of the bridge are vertically aligned. When the upper surface of the two rubber pads contacts the lower surface of the bridge, the lifting of the frame plate is stopped.

[0018] S2: Simultaneously turn on the first motor and the detector body, the first moving seat causes the two first guide blocks to slide horizontally back and forth along the inner wall of the first guide groove and the detector body to move horizontally back and forth through the mounting sleeve;

[0019] S3: When the two first guide blocks slide horizontally to the ends of the two first guide grooves, the second motor is turned on. The drive shaft of the second motor causes a second rotating rod to rotate. The two second rotating rods are transmitted by the transmission belt through the two transmission wheels. The transmission belt causes the drive rod to move horizontally through the moving block. The drive rod causes the second moving seat to move longitudinally through the strip groove. The second moving seat causes the detector body to move longitudinally through the cross plate and the mounting sleeve. Thus, the detector body can detect the underside of the bridge by moving laterally and longitudinally.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. By placing the detector body inside the mounting sleeve, and driving the two L-shaped fixing plates and two L-shaped protective pads to move closer to each other, the two L-shaped protective pads fix the detector body inside the mounting sleeve, thus facilitating the fixed installation of the detector body and effectively improving the convenience of installing the detector body. At the same time, it is convenient for subsequent staff to disassemble and maintain the detector body.

[0022] 2. When the external crane begins to lift the frame plate, the upper surface of the horizontal plate and the lower surface of the bridge are vertically aligned. The lifting of the frame plate stops when the upper surface of the rubber pad contacts the lower surface of the bridge. The limiting plate and the rubber pad protect the detector body, preventing damage to the detector body from contact with the lower surface of the bridge during lifting operations. At the same time, the telescopic rod and telescopic spring give the limiting plate a certain degree of flexibility, making it easy to control the distance between the detector body and the lower surface of the bridge. This invention uses a crane for lifting, which is convenient for deployment at appropriate locations on or under the bridge according to the terrain or construction needs.

[0023] 3. By driving the first moving seat to move horizontally, the first moving seat causes the detector body to move horizontally through the mounting sleeve. By driving the second moving seat to move horizontally, the second moving seat causes the detector body to move vertically through the cross plate and mounting sleeve. This facilitates the horizontal and vertical movement of the detector body, which completes the inspection of the bridge's underside surface. This effectively improves the convenience of inspecting the bridge's underside surface. At the same time, compared with existing technologies, the inspection method using a suspended basket and manual labor avoids injury to inspection personnel due to the basket tipping over, thus improving the safety of bridge underside surface inspection operations. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the connection between the frame plate and the cross plate of the present invention.

[0025] Figure 2 This is another schematic diagram showing the connection between the frame plate and the cross plate of the present invention.

[0026] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of part A in the diagram.

[0027] Figure 4 This is a schematic diagram showing the connection between the horizontal plate, the mounting sleeve, and the main body of the testing instrument of the present invention.

[0028] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of part B in the diagram.

[0029] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of part C in the diagram.

[0030] Figure 7 This is a cross-sectional structural diagram of the mounting sleeve of the present invention.

[0031] Figure 8 This is a schematic diagram of the connection of the longitudinal moving mechanism of the present invention.

[0032] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of part D in the diagram.

[0033] In the diagram: 1. Frame plate; 11. Mounting ear; 12. Mounting hole; 2. Horizontal plate; 3. Mounting sleeve; 4. Tester body; 5. Lateral movement mechanism; 51. Reciprocating screw; 511. First through slot; 52. First moving seat; 53. First guide slot; 54. First guide block; 55. Synchronizing rod; 56. Connecting block; 57. Second through slot; 58. First rotating rod; 59. First motor; 6. First fixing block; 7. Longitudinal movement mechanism; 71. Second moving seat; 72. Strip groove 73. Second guide groove; 74. Second guide block; 75. Second rotating rod; 76. Transmission wheel; 77. Transmission belt; 78. Moving block; 79. Drive rod; 8. Second motor; 81. Second fixing block; 9. Limiting assembly; 91. Limiting plate; 92. Rubber pad; 93. Base plate; 94. Telescopic rod; 95. Telescopic spring; 10. Disassembly and assembly mechanism; 101. L-shaped fixing plate; 102. L-shaped protective pad; 103. Guide rod; 104. Threaded rod; 105. Handle. Detailed Implementation

[0034] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0035] Example 1:

[0036] like Figure 1-9 As shown, the present invention provides a bridge crack detection device, including a frame plate 1, a horizontal plate 2 on one side of the frame plate 1, a mounting sleeve 3 on the upper surface of the horizontal plate 2, a detector body 4 detachably mounted inside the mounting sleeve 3, a transverse moving mechanism 5 between the horizontal plate 2 and the mounting sleeve 3, the transverse moving mechanism 5 enabling the detector body 4 to move horizontally laterally through the mounting sleeve 3, and a longitudinal moving mechanism 7 between the frame plate 1 and the horizontal plate 2, the longitudinal moving mechanism 7 enabling the detector body 4 to move horizontally through the horizontal plate 2 and the mounting sleeve 3. The detector body 4 is moved horizontally in the longitudinal direction. The surface of the mounting sleeve 3 is provided with a limiting component 9. When the horizontal plate 2 is on the lower surface of the bridge, the limiting component 9 can limit the distance between the horizontal plate 2 and the lower surface of the bridge, so as to prevent the upper surface of the detector body 4 from contacting the lower surface of the bridge and causing damage to the detector body 4. The mounting sleeve 3 is provided with a disassembly and assembly mechanism 10 for disassembling and assembling the detector body 4. Through the disassembly and assembly mechanism 10, the detector body 4 can be easily installed and disassembled, which facilitates the maintenance of the detector body 4 by the staff.

[0037] By adopting the above technical solution, a lateral moving mechanism 5 is set up, which moves the detector body 4 horizontally through the mounting sleeve 3. A longitudinal moving mechanism 7 is set up, which moves the detector body 4 vertically through the horizontal plate 2 and the mounting sleeve 3. A limiting component 9 is set up, which limits the distance between the horizontal plate 2 and the lower surface of the bridge when the horizontal plate 2 is on the lower surface of the bridge, so as to avoid the upper surface of the detector body 4 from contacting the lower surface of the bridge and causing damage to the detector body 4. A disassembly and assembly mechanism 10 is set up, which facilitates the installation and disassembly of the detector body 4, thereby facilitating the maintenance of the detector body 4 by the staff.

[0038] The frame plate 1 is fixedly connected with evenly distributed mounting ears 11 on both the top and bottom surfaces. Mounting holes 12 are provided on the mounting ears 11. Through the mounting ears 11 and mounting holes 12, it is easy for the staff to fix the frame plate 1 to the boom of the crane.

[0039] By adopting the above technical solution and by setting the mounting ears 11 and mounting holes 12, it is convenient for workers to fix the frame plate 1 to the boom of the crane.

[0040] The lateral movement mechanism 5 includes a reciprocating screw 51. A first through groove 511 is provided on the upper surface of the horizontal plate 2. One end of the reciprocating screw 51 is rotatably connected to the inner wall of the first through groove 511. A first movable seat 52 is provided on the upper surface of the horizontal plate 2. Two first guide grooves 53 are provided on the upper surface of the horizontal plate 2. A first guide block 54 is slidably connected to the inner wall of each of the two first guide grooves 53. The first guide block 54 can slide horizontally along the inner wall of the first guide groove 53. The upper surface of the two first guide blocks 54 is fixedly connected to the lower surface of the first movable seat 52. The first guide block 54 can keep the first movable seat 52 moving horizontally. A synchronizing rod 55 is fixedly installed on the inner wall of the first movable seat 52. A connecting block 56 is rotatably installed on the end of the synchronizing rod 55 away from the first movable seat 52. The connecting block 56 is in active contact with the threaded groove of the reciprocating screw 51. By rotating the reciprocating screw 51, the reciprocating screw 51 can make the first movable seat 52 move horizontally back and forth through the connecting block 56 and the synchronizing rod 55.

[0041] By adopting the above technical solution, by setting the first guide groove 53 and the first guide block 54, the first guide block 54 can enable the first moving seat 52 to maintain horizontal movement. By rotating the reciprocating screw 51, the reciprocating screw 51 causes the first moving seat 52 to reciprocate horizontally through the connecting block 56 and the synchronizing rod 55.

[0042] A second through groove 57 is provided on the upper surface of the horizontal plate 2. The second through groove 57 and the first through groove 511 are arranged on the same plane along the length of the horizontal plate 2. A first rotating rod 58 is rotatably installed on the inner wall of the second through groove 57. One end of the first rotating rod 58 is fixedly connected to one end of the reciprocating screw 51. The first rotating rod 58 can make the reciprocating screw 51 rotate. A first motor 59 is fixedly installed on the inner wall of the second through groove 57. The drive output end of the first motor 59 is fixedly connected to one end of the first rotating rod 58. By turning on the first motor 59, the drive shaft of the first motor 59 can make the first rotating rod 58 rotate.

[0043] By adopting the above technical solution, by turning on the first motor 59, the drive shaft of the first motor 59 causes the first rotating rod 58 to rotate, and the first rotating rod 58 causes the reciprocating screw 51 to rotate.

[0044] A first fixing block 6 is fixedly connected to the end of the first motor 59 away from the first rotating rod 58. The side of the first fixing block 6 away from the first motor 59 is fixedly connected to the inner wall of the second through groove 57. By setting the first fixing block 6, the first fixing block 6 can support and fix the first motor 59, thereby improving the stability of the first motor 59.

[0045] By adopting the above technical solution, and by setting the first fixing block 6, the stability of the first motor 59 is improved.

[0046] The longitudinal moving mechanism 7 includes a second movable seat 71, one side of which is fixedly connected to one side of the horizontal plate 2. When the second movable seat 71 moves longitudinally horizontally, it can move the detector body 4 longitudinally horizontally via the horizontal plate 2 and the mounting sleeve 3. A strip groove 72 is provided on the inner wall of the second movable seat 71. Two second guide grooves 73 are provided on one side of the frame plate 1. Second guide blocks 74 are slidably connected to the inner walls of both second guide grooves 73. The second guide blocks 74 can slide horizontally along the inner walls of the second guide grooves 73. One side of the two second guide blocks 74 is fixedly connected to one side of the second movable seat 71. The second guide blocks 74 can keep the second movable seat 71 in a horizontal position. The machine moves horizontally. Two second rotating rods 75 are rotatably mounted on one side of the frame plate 1. A transmission wheel 76 is fixedly mounted on one end of each of the two second rotating rods 75. A transmission belt 77 is connected between the two transmission wheels 76. The two second rotating rods 75 can transmit power through the transmission belt 77 via the two transmission wheels 76. A moving block 78 is fixedly mounted on the outer wall of the transmission belt 77. A drive rod 79 is fixedly mounted on one side of the moving block 78. The transmission belt 77 can move the drive rod 79 horizontally via the moving block 78. The end of the drive rod 79 away from the moving block 78 is in movable contact with the inner wall of the strip groove 72. The drive rod 79 can move the second moving seat 71 reciprocating horizontally via the strip groove 72.

[0047] By adopting the above technical solution, by driving a second rotating rod 75 to rotate, the two second rotating rods 75 transmit power through the transmission belt 77 via the two transmission wheels 76, the transmission belt 77 causes the drive rod 79 to move horizontally via the moving block 78, the drive rod 79 causes the second moving seat 71 to move longitudinally reciprocally via the strip groove 72, and the second moving seat 71 causes the detector body 4 to move longitudinally reciprocally via the horizontal plate 2 and the mounting sleeve 3.

[0048] A second motor 8 is fixedly installed on one side of the frame plate 1. The drive output end of the second motor 8 is fixedly connected to one end of a second rotating rod 75. By turning on the second motor 8, the drive shaft of the second motor 8 can make a second rotating rod 75 rotate. A second fixing block 81 is fixedly connected to the outer wall of the second motor 8. One side of the second fixing block 81 is fixedly connected to one side of the frame plate 1. The second fixing block 81 can support and fix the second motor 8, thereby improving the stability of the second motor 8.

[0049] By adopting the above technical solution, by setting a second fixing block 81, the second fixing block 81 supports and fixes the second motor 8, thereby improving the stability of the second motor 8. By turning on the second motor 8, the drive shaft of the second motor 8 causes a second rotating rod 75 to rotate.

[0050] The limiting assembly 9 includes two limiting plates 91, each with a rubber pad 92 fixedly mounted on its upper surface. When an external crane lifts the frame plate 1 to the lower surface of the bridge via its boom, the lifting of the frame plate 1 stops when the upper surface of the rubber pad 92 contacts the lower surface of the bridge. The limiting plates 91 and rubber pads 92 are designed to prevent the upper surface of the detector body 4 from contacting the lower surface of the bridge and causing damage to the detector body 4. Base plates 93 are fixedly mounted on both sides of the mounting sleeve 3, and telescopic joints are fixedly mounted on the upper surfaces of both base plates 93. The piston end of the telescopic rod 94 is fixedly connected to the lower surface of the limiting plate 91. The outer walls of the two telescopic rods 94 are movably fitted with telescopic springs 95. One end of the telescopic spring 95 is fixedly connected to the upper surface of the base plate 93, and the end of the telescopic spring 95 away from the base plate 93 is fixedly connected to the lower surface of the limiting plate 91. By setting the telescopic rods 94 and the telescopic springs 95, the limiting plate 91 and the rubber pad 92 have a certain degree of elasticity. When the boom of the external crane lifts the frame plate 1, it is convenient to control the distance between the detector body 4 and the lower surface of the bridge.

[0051] By adopting the above technical solution, when the external crane lifts the frame plate 1 to the lower surface of the bridge through the boom, the lifting of the frame plate 1 will stop when the upper surface of the rubber pad 92 contacts the lower surface of the bridge. The setting of the limiting plate 91 and the rubber pad 92 avoids the upper surface of the detector body 4 from contacting the lower surface of the bridge, which would cause damage to the detector body 4. By setting the telescopic rod 94 and the telescopic spring 95, the limiting plate 91 and the rubber pad 92 have a certain degree of flexibility. When the boom of the external crane lifts the frame plate 1, it is convenient to control the distance between the detector body 4 and the lower surface of the bridge.

[0052] The disassembly and assembly mechanism 10 includes two L-shaped fixing plates 101. The L-shaped fixing plates 101 are in movable contact with the inner wall of the mounting sleeve 3. When the two L-shaped fixing plates 101 move towards each other, the two L-shaped fixing plates 101 can fix the detector body 4 inside the mounting sleeve 3. The inner wall of the mounting sleeve 3 is fixedly installed with evenly distributed guide rods 103. The piston ends of two adjacent guide rods 103 are fixedly connected to the outer wall of an L-shaped fixing plate 101. By setting the guide rods 103, the guide rods 103 can make the L-shaped fixing plate 101 move horizontally. Threaded rods 104 are threadedly rotatably installed on both sides of the mounting sleeve 3. One end of the threaded rod 104 is rotatably connected to the outer wall of the L-shaped fixing plate 101. By rotating the threaded rod 104, the threaded rod 104 can make the L-shaped fixing plate 101 move horizontally.

[0053] The shape and size of the inner cavity of the mounting sleeve 3 and the fixing plate 101 can be set according to different detection requirements, which facilitates the installation and fixing of different detection instruments, thereby increasing the types of instruments that can be detected by the present invention.

[0054] By adopting the above technical solution, after the detector body 4 is placed inside the mounting sleeve 3, by rotating the two threaded rods 104, the two threaded rods 104 bring the two L-shaped fixing plates 101 closer to each other, and the two L-shaped fixing plates 101 fix the detector body 4 inside the mounting sleeve 3.

[0055] L-shaped protective pads 102 are fixedly installed on the inner walls of the two L-shaped fixing plates 101. The inner walls of the two L-shaped protective pads 102 are in contact with the outer wall of the detector body 4. The L-shaped fixing plates 101 can fix the detector body 4 through the L-shaped protective pads 102. The L-shaped protective pads 102 can prevent the outer shell of the detector body 4 from being worn. Handles 105 are fixedly installed on the ends of the two threaded rods 104 away from the L-shaped fixing plates 101. The threaded rods 104 can be rotated by turning the handles 105.

[0056] By adopting the above technical solution, by setting an L-shaped protective pad 102, the L-shaped fixing plate 101 is fixed to the detector body 4 by the L-shaped protective pad 102. The L-shaped protective pad 102 prevents the outer shell of the detector body 4 from being worn. By turning the knob handle 105, the threaded rod 104 is rotated.

[0057] The bridge crack detection method of the aforementioned detection device comprises the following steps:

[0058] When it is necessary to inspect the lower surface of the bridge, the staff first places the instrument body 4 in the center inside the mounting sleeve 3, and then simultaneously turns the two handles 105. The two handles 105 cause the two threaded rods 104 to rotate. As the two threaded rods 104 rotate, the two L-shaped fixing plates 101 and the two L-shaped protective pads 102 move closer to each other. At the same time, the piston ends of the four guide rods 103 extend until the inner walls of the two L-shaped protective pads 102 are in close contact with the outer shell of the instrument body 4. Then, the staff stops turning the two handles 105. At this time, the two L-shaped fixing plates 101 fix the instrument body 4 inside the mounting sleeve 3, thus facilitating the fixed installation of the instrument body 4 and effectively improving the convenience of installing the instrument body 4. At the same time, it is convenient for the staff to disassemble and maintain the instrument body 4 later.

[0059] Subsequently, the frame plate 1 is fixed to the boom of the crane through multiple mounting holes 12. When the boom of the crane lifts the frame plate 1, the upper surface of the horizontal plate 2 and the lower surface of the bridge are vertically aligned. When the upper surfaces of the two rubber pads 92 contact the lower surface of the bridge, the lifting of the frame plate 1 is stopped. At this time, the two limiting plates 91 and the two rubber pads 92 protect the detector body 4 inside the mounting sleeve 3 to prevent the detector body 4 from contacting the lower surface of the bridge during the lifting operation and causing damage to the detector body 4. At the same time, the two telescopic rods 94 and the two telescopic springs 95 give the two limiting plates 91 a certain degree of flexibility, which makes it easy to control the distance between the detector body 4 and the lower surface of the bridge.

[0060] Finally, the first motor 59 and the detector body 4 are turned on simultaneously. The drive shaft of the first motor 59 causes the first rotating rod 58 to rotate, which in turn causes the reciprocating screw 51 to rotate. Simultaneously, the reciprocating screw 51 rotates, causing the first moving seat 52 to move laterally via the connecting block 56 and the synchronizing rod 55. The first moving seat 52 causes the two first guide blocks 54 to slide horizontally back and forth along the inner wall of the first guide groove 53, and the detector body 4 to move laterally via the mounting sleeve 3. When the two first guide blocks 54 slide horizontally to the ends of the two first guide grooves 53, the second motor 8 is turned on. The drive shaft of the second motor 8 causes one second rotating rod 75 to rotate, and the two second rotating rods 75 move laterally via two... A transmission wheel 76 drives the transmission belt 77 to transmit power. The transmission belt 77 moves the drive rod 79 horizontally via the moving block 78. The drive rod 79 moves the second moving seat 71 longitudinally via the strip groove 72. The second moving seat 71 moves the detector body 4 longitudinally via the cross plate 2 and the mounting sleeve 3. This facilitates the lateral and longitudinal movement of the detector body 4. The lateral and longitudinal movement of the detector body 4 completes the inspection of the bridge's underside surface, thus effectively improving the convenience of inspecting the bridge's underside surface. At the same time, compared with existing technologies, the inspection is carried out by using a suspended basket and manual labor, avoiding injury to the inspection personnel due to the basket tipping over, and improving the safety of bridge underside surface inspection operations.

Claims

1. A bridge crack detection device, characterized in that: The device includes a frame plate (1), a horizontal plate (2), a mounting sleeve (3), a detector body (4), a transverse moving mechanism (5), and a longitudinal moving mechanism (7). The frame plate (1) has a horizontal plate (2) on one side, and the upper surface of the horizontal plate (2) has a mounting sleeve (3). The detector body (4) is detachably installed inside the mounting sleeve (3). The transverse moving mechanism (5) is provided between the horizontal plate (2) and the mounting sleeve (3), and the longitudinal moving mechanism (7) is provided between the frame plate (1) and the horizontal plate (2).

2. The bridge crack detection device as described in claim 1, characterized in that: The transverse moving mechanism (5) includes a reciprocating screw (51). A first through groove (511) is provided on the upper surface of the horizontal plate (2). One end of the reciprocating screw (51) is rotatably connected to the inner wall of the first through groove (511). A first moving seat (52) is provided on the upper surface of the horizontal plate (2). Two first guide grooves (53) are provided on the upper surface of the horizontal plate (2). A first guide block (54) is slidably connected to the inner wall of each of the two first guide grooves (53). The upper surface of the two first guide blocks (54) is fixedly connected to the lower surface of the first moving seat (52). A synchronizing rod (55) is fixedly installed on the inner wall of the first moving seat (52). A connecting block (56) is rotatably installed on the end of the synchronizing rod (55) away from the first moving seat (52). The connecting block (56) is in active contact with the thread groove of the reciprocating screw (51).

3. The bridge crack detection device as described in claim 2, characterized in that: The upper surface of the horizontal plate (2) is provided with a second through groove (57). A first rotating rod (58) is rotatably installed on the inner wall of the second through groove (57). One end of the first rotating rod (58) is fixedly connected to one end of the reciprocating screw (51). A first motor (59) is fixedly installed on the inner wall of the second through groove (57). The drive output end of the first motor (59) is fixedly connected to one end of the first rotating rod (58).

4. The bridge crack detection device as described in claim 3, characterized in that: The first motor (59) is fixedly connected to a first fixing block (6) at the end away from the first rotating rod (58). The side of the first fixing block (6) away from the first motor (59) is fixedly connected to the inner wall of the second through groove (57). The first motor (59) is fixed in the second through groove (57) by the first fixing block (6).

5. The bridge crack detection device as described in claim 1, characterized in that: The longitudinal moving mechanism (7) includes a second moving seat (71), one side of which is fixedly connected to one side of the horizontal plate (2). A strip groove (72) is provided on the inner wall of the second moving seat (71). Two second guide grooves (73) are provided on one side of the frame plate (1). Second guide blocks (74) are slidably connected to the inner walls of both second guide grooves (73). One side of each of the two second guide blocks (74) is fixedly connected to one side of the second moving seat (71). Two second rotating rods (75) are rotatably mounted on one side of the frame plate (1). A transmission wheel (76) is fixedly mounted on one end of each of the two second rotating rods (75). A transmission belt (77) is connected between the two transmission wheels (76). A moving block (78) is fixedly mounted on the outer wall of the transmission belt (77). A drive rod (79) is fixedly mounted on one side of the moving block (78). The end of the drive rod (79) away from the moving block (78) is in contact with the inner wall of the strip groove (72).

6. The bridge crack detection device as described in claim 1, characterized in that: Mounting ears (11) are fixedly connected to both the upper and lower surfaces of the frame plate (1). Mounting ears (11) are provided with mounting holes (12). The surface of the mounting sleeve (3) is provided with a limiting component (9). The interior of the mounting sleeve (3) is provided with a disassembly and assembly mechanism (10) for disassembling and assembling the detector body (4).

7. A bridge crack detection device as described in claim 6, characterized in that: The limiting assembly (9) includes two limiting plates (91). Rubber pads (92) are fixedly installed on the upper surfaces of the two limiting plates (91). Telescopic rods (94) are fixedly installed on the upper surface of the base plate (93). The piston end of the telescopic rod (94) is fixedly connected to the lower surface of the limiting plate (91). Telescopic springs (95) are movably sleeved on the outer walls of the two telescopic rods (94). One end of the telescopic spring (95) is fixedly connected to the upper surface of the base plate (93), and the end of the telescopic spring (95) away from the base plate (93) is fixedly connected to the lower surface of the limiting plate (91).

8. A bridge crack detection device as described in claim 6, characterized in that: The disassembly and assembly mechanism (10) includes a fixing plate (101) and guide rods (103). The fixing plate (101) is in movable contact with the inner wall of the mounting sleeve (3), and the fixing plate (101) is in movable contact with the outer wall of the detector body (4). The guide rods (103) are evenly distributed and installed on the inner wall of the mounting sleeve (3). The piston ends of two adjacent guide rods (103) are fixedly connected to the outer wall of a fixing plate (101). Threaded rods (104) are threaded and rotatably installed on both sides of the mounting sleeve (3). One end of the threaded rod (104) is rotatably connected to the outer wall of the fixing plate (101).

9. A bridge crack detection device as described in claim 8, characterized in that: The inner wall of the fixing plate (101) is fixedly equipped with a protective pad (102). The inner wall of the protective pad (102) is in contact with the outer wall of the detector body (4). The fixing plate (101) can fix the detector body (4) through the protective pad (102). The end of the threaded rod (104) away from the fixing plate (101) is fixedly equipped with a handle (105).

10. A method for detecting bridge cracks using the detection device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: When it is necessary to inspect the lower surface of the bridge, first place the main body (4) of the detector (3) inside the mounting sleeve (3), and fix the frame plate (1) on the boom of the crane through multiple mounting holes (12). When the boom of the crane lifts the frame plate (1), the upper surface of the horizontal plate (2) and the lower surface of the bridge are vertically aligned. When the upper surface of the two rubber pads (92) contacts the lower surface of the bridge, the lifting of the frame plate (1) is stopped. S2: Simultaneously turn on the first motor (59) and the detector body (4), the first moving seat (52) causes the two first guide blocks (54) to slide horizontally back and forth along the inner wall of the first guide groove (53) and the detector body (4) to move horizontally back and forth through the mounting sleeve (3); S3: When the two first guide blocks (54) slide horizontally to the end of the two first guide grooves (53), the second motor (8) is turned on. The drive shaft of the second motor (8) causes a second rotating rod (75) to rotate. The two second rotating rods (75) are transmitted by the transmission belt (77) through the two transmission wheels (76). The transmission belt (77) causes the drive rod (79) to move horizontally through the moving block (78). The drive rod (79) causes the second moving seat (71) to move longitudinally through the strip groove (72). The second moving seat (71) causes the detector body (4) to move longitudinally through the horizontal plate (2) and the mounting sleeve (3), so that the detector body (4) can detect the lower surface of the bridge by moving laterally and longitudinally.

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