A bridge expansion joint detection device

Abstract

The present invention discloses a bridge expansion joint detection device, which belongs to the field of expansion joint detection technology, and includes a support plate, a lifting assembly is provided at the bottom of the support plate, and a lifting plate is provided below the lifting assembly. In the present invention, a second spring drives the sliding plate and the cleaning guide wheel to adapt to the inner wall of the expansion joint, so that the laser detection device is always in a vertical state with the inner wall of the expansion joint, and the laser detection device is always in a suitable position with the position to be detected of the expansion joint, thereby improving the monitoring effect and accuracy of the expansion joint. In addition, the cleaning guide wheel can clean the inner wall of the expansion joint to a certain extent during the movement, thereby improving the clarity of the area to be detected and ensuring the accuracy of the detection results. At the same time, the transmission of the cleaning guide wheel drives the cleaning plate to clean the dustproof glass, thereby ensuring the clarity of the laser detection device probe, avoiding dust and impurities from affecting the detection results, and improving the detection effect of the expansion joint.

Description

Technical Field

[0001] The present invention belongs to the technical field of expansion joint detection, and in particular relates to a bridge expansion joint detection device. Background Art

[0002] To adapt to the rapid development of modern transportation industry, bridges are also extended to buildings that are built across mountain streams, poor geological conditions or to meet other transportation needs to make travel more convenient. During the construction of bridges, in order to avoid deformation and damage of the bridge due to thermal expansion and contraction in the natural environment, expansion joints need to be reserved to ensure the safe use of the bridge. After the bridge is used for a long time, the quality of the expansion joints needs to be regularly inspected to avoid accidents.

[0003] Document No. CN202310937645.7 discloses a bridge expansion joint damage detection device and detection method. The detection device includes an external insert, a fixed seat, a side movable member, a detection assembly, and an adjustment assembly for adjusting the distance between the detection assembly and the fixed seat. The detection assembly is disposed within the side movable member. The detection assembly includes a rotating ball, a telescopic rod, and a tension sensor. The telescopic rod and the tension sensor are disposed on the side of the partition near the movable cavity. The rotating ball is rotatably disposed within the mounting ring. The rotating ball and the tension sensor are connected by a compression spring, and the compression spring is sleeved on the telescopic rod. A drive unit drives the connecting plate to move, and the movement of the connecting plate drives the detection assembly within the side movable member to move along the length of the fixed seat. The detection method includes the following steps: placing the device; adjusting the rotation angle of the detection assembly; adjusting the distance between the detection assembly and the fixed seat; fixing the position of the external insert; and data detection. The invention can obtain a variety of detection data and improve detection efficiency. However, in actual detection, when the detection device is used for expansion joints of different widths, the detection results will be affected by long-term dust and impurities remaining in the expansion joints. Therefore, certain improvements are needed. Summary of the Invention

[0004] The purpose of the present invention is to propose a bridge expansion joint detection device to solve the problem that when a detection device faces expansion joints of different widths, the detection results will be affected by long-term residual dust and impurities in the expansion joints.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bridge expansion joint detection device includes a support plate, a lifting assembly is provided at the bottom of the support plate, a lifting plate is provided below the lifting assembly, guide cleaning assemblies are provided on both sides of the lifting plate, and an obstacle removal assembly is provided on one side of the lifting plate;

[0007] The guide cleaning assembly includes two symmetrically arranged sliding plates, which are slidably connected to one side of the lifting plate. A mounting groove is provided on the side of the sliding plate away from the lifting plate. Two symmetrically distributed laser detection devices for detecting expansion joints are fixedly installed in the mounting groove. A dust-proof glass plate for protecting the laser detection device is connected inside the mounting groove. Cleaning guide wheels for fitting with the inner wall of the expansion joint are provided on both sides of the sliding plate, and a cleaning plate for cleaning the dust-proof glass plate is transmission-connected to one side of the cleaning guide wheel. The cleaning guide wheel is used to adapt to expansion joints of different widths and clean the inner wall of the expansion joint. At the same time, the cleaning plate is driven by the transmission belt to clean the surface of the dust-proof glass.

[0008] As a further description of the above technical solution:

[0009] Sliding grooves are provided on both sides of the lifting plate, the sliding plate is slidably connected to the sliding grooves, and two sliding rods are connected to the sliding grooves. A sliding hole is provided on the side of the sliding plate away from the laser detection device, and the sliding rod is slidably connected to the sliding hole. A second spring is sleeved on the outer surface of the sliding rod, and the two sides of the second spring are respectively connected to one side of the inner wall of the sliding groove and one side of the sliding plate.

[0010] As a further description of the above technical solution:

[0011] Two symmetrically arranged connecting rods are connected to one side of the cleaning plate, and the ends of the two connecting rods away from the cleaning plate are connected to a screw seat. A reciprocating screw is connected to the internal thread of the screw seat, and both ends of the reciprocating screw are rotatably connected to a fixed seat. One side of the fixed seat is connected to one side of the sliding plate, and the two reciprocating screws are symmetrically distributed on both sides of the mounting groove.

[0012] As a further description of the above technical solution:

[0013] Both sides of the reciprocating screw extend to the other side of the fixed seat and are connected to a driven wheel, both sides of the sliding plate are connected to side plates, one side of the side plate is connected to two mounting seats, the cleaning guide wheel is rotatably connected between the two mounting seats through a rotating shaft, one end of the rotating shaft extends to the other side of the mounting seat and is connected to a driving wheel, and a transmission belt is connected between the driving wheel and the driven wheel.

[0014] As a further description of the above technical solution:

[0015] The lifting assembly includes a lifting motor, which is connected to the bottom of the support plate through a first mounting plate. One end of the lifting motor output shaft is connected to a lifting screw. The outer surface of one end of the lifting screw is threadedly connected to the lifting plate. Both sides of the bottom of the support plate are connected to telescopic rods, and the other end of the telescopic rods is connected to the top of the lifting plate. The two telescopic rods are symmetrically distributed on both sides of the lifting screw.

[0016] As a further description of the above technical solution:

[0017] The obstacle clearing assembly includes a fixed box, one side of the fixed box is connected to one side of the lifting plate, a hollow tube is rotatably connected in the fixed box, one side of the hollow tube is connected to a rotating box, a plurality of nozzles that can swing back and forth are distributed in a circular array on one side of the rotating box, both sides of the nozzles are hinged with hinged seats, one side of the hinged seat is connected to one side of the rotating box, one side of the nozzle is hinged with a connecting rod, the other end of the connecting rod is hinged with a sliding rod, the other end of the sliding rod is connected to an extrusion wheel, one end of the nozzle is connected with a connecting pipe, the other end of the connecting pipe extends into the hollow tube and is connected to a micro water pump, and one side of the micro water pump is connected to the inner wall of the hollow tube.

[0018] As a further description of the above technical solution:

[0019] A protrusion is connected to one side of the rotating box, a gear ring is connected to the outer peripheral side of the rotating box, a driving motor is fixedly installed on one side of the fixed box through a second mounting plate, one end of the driving motor output shaft is connected to a driving gear, and one side of the driving gear is meshed with the gear ring.

[0020] As a further description of the above technical solution:

[0021] A plurality of fixed sleeves are connected to the outer periphery of the rotating box, the slide rod is slidably connected to the fixed slide groove, a first spring is sleeved on the outer surface of the slide rod, two ends of the first spring are respectively connected to one side of the fixed sleeve and one side of the extrusion wheel, one side of the lifting plate is connected to a fixed ring through a fixed column, and one side of the fixed ring is connected to a plurality of extrusion blocks in a circular array, the cross-section of the extrusion block is trapezoidal, and the extrusion block periodically fits with the extrusion wheel.

[0022] As a further description of the above technical solution:

[0023] One side of the top of the support plate is connected to a water tank, one side of the water tank is connected to a delivery pipe, the other end of the delivery pipe extends to the other side of the support plate and is connected to the top of the fixed box, and the end of the water tank away from the delivery pipe is connected to a liquid adding pipe.

[0024] As a further description of the above technical solution:

[0025] One side of the top of the support plate is connected to a control device, and the four sides of the bottom of the support plate are connected to driving wheels, and one side of the driving wheel is provided with a driving device.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In the present invention, by setting a guide cleaning component, when the lifting plate enters the expansion joint, the sliding plate fits the inner wall of the expansion joint outward under the cooperation of the second spring and the sliding rod, and the laser detection device arranged in the installation groove can detect the internal structure of the expansion joint through the dust-proof glass plate. The support plate moves along the extension direction of the expansion joint, and the cleaning guide wheel cleans and dusts the inner wall of the expansion joint to a certain extent. In addition, the cleaning guide wheel drives the cleaning plate to clean the dust-proof glass through the driving wheel, the transmission belt, the driven wheel, the reciprocating screw and the screw seat. On the one hand, the sliding plate and the cleaning guide wheel are driven by the second spring to The adaptation of the inner wall of the expansion joint can make the laser detection device always perpendicular to the inner wall of the expansion joint, and make the laser detection device always in the appropriate position with the position to be detected of the expansion joint, thereby improving the monitoring effect and accuracy of the expansion joint. On the other hand, the cleaning guide wheel can clean the inner wall of the expansion joint to a certain extent during the movement, thereby improving the clarity of the area to be detected and ensuring the accuracy of the detection results. At the same time, the cleaning plate is driven by the transmission of the cleaning guide wheel to clean the dust-proof glass, thereby ensuring the clarity of the laser detection device probe, avoiding dust and impurities from affecting the detection results, and improving the detection effect of the expansion joint.

[0028] 2. In the present invention, by setting an obstacle removal component, the driving motor drives the rotating box to rotate through the driving gear and the gear ring, the rotating box drives the nozzle and the fixed sleeve to rotate, and the fixed sleeve drives the nozzle to swing back and forth around the hinge seat through the slide rod, extrusion wheel, fixed ring, extrusion block, first spring, slide rod and connecting rod, and water enters the fixed box from the water tank, and the micro water pump transports the water flow to the nozzle through the connecting pipe and sprays it out through the nozzle to form a jet to clean the inner wall of the expansion joint. The reciprocating swinging nozzle can increase the cleaning range and avoid the occurrence of cleaning dead corners, so that the dust accumulated in the expansion joint can be cleaned and the possible obstacles can be pushed away, thereby ensuring the smoothness of the detection and avoiding the influence of impurities and dust on the detection results.

[0029] 3. In the present invention, a lifting assembly is set up, and the staff starts the lifting motor. The lifting motor moves in the vertical direction through the lifting screw, the telescopic rod and the lowering plate, and the laser detection device is driven to the appropriate position of the expansion joint through the lifting plate. By controlling the moving stroke of the lifting plate, the laser detection device can penetrate into expansion joints of different depths for detection, thereby improving the overall applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0032] Figure 3 It is a schematic diagram of a partially three-dimensional split structure of the present invention;

[0033] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0034] Figure 5 For the present invention Figure 3 The enlarged structural diagram of part B in the middle;

[0035] Figure 6 A schematic diagram of a partial three-dimensional structure of the guide cleaning assembly of the present invention;

[0036] Figure 7 For the present invention Figure 6 The enlarged structural diagram of part C in the middle;

[0037] Figure 8 It is a schematic diagram of the three-dimensional disassembled structure of the obstacle removal component of the present invention;

[0038] Figure 9 It is a partial three-dimensional structural schematic diagram of the obstacle removal component of the present invention.

[0039] Legend:

[0040] 1. Support plate; 2. Driving wheel; 3. Driving device; 4. Control device; 5. Obstacle removal assembly; 501. Liquid adding pipe; 502. Delivery pipe; 503. Water tank; 504. Rotating box; 505. Bump; 506. Hollow pipe; 507. Nozzle; 508. Connecting pipe; 509. Connecting rod; 510. Fixed sleeve; 511. Extrusion wheel; 512. First spring; 513. Sliding rod; 514. Gear ring; 515. Driving motor; 516. Driving gear; 517. Fixed ring; 518. Extrusion block; 519. Micro water pump; 520. Fixed box; 6. Guide cleaning assembly; 601. Sliding plate; 602. Second spring; 603. Sliding rod; 604. Cleaning guide wheel; 605. Dust-proof glass plate; 606. Side plate; 607. Driving wheel; 608. Transmission belt; 609. Driven wheel; 610. Reciprocating screw; 611. Cleaning plate; 612. Screw seat; 7. Lifting assembly; 701. Telescopic rod; 702. Lifting motor; 703. Lifting screw; 8. Lifting plate; 9. Laser detection device. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] See also Figures 1-9 The present invention provides a technical solution: a bridge expansion joint detection device, comprising a support plate 1, a lifting assembly 7 is provided at the bottom of the support plate 1, a lifting plate 8 is provided below the lifting assembly 7, guide cleaning assemblies 6 are provided on both sides of the lifting plate 8, and an obstacle removal assembly 5 is provided on one side of the lifting plate 8. A control device 4 is connected to one side of the top of the support plate 1, and driving wheels 2 are connected on all four sides of the bottom of the support plate 1, and a driving device 3 is provided on one side of the driving wheel 2.

[0043] The guide cleaning assembly 6 includes two symmetrically arranged sliding plates 601, which are slidably connected to one side of the lifting plate 8. A mounting groove is provided on the side of the sliding plate 601 away from the lifting plate 8. Two symmetrically distributed laser detection devices 9 for detecting the expansion joint are fixedly installed in the mounting groove. A dust-proof glass plate 605 for protecting the laser detection device 9 is connected inside the mounting groove. Cleaning guide wheels 604 for fitting with the inner wall of the expansion joint are provided on both sides of the sliding plate 601, and a cleaning plate 611 for cleaning the dust-proof glass plate 605 is transmission-connected to one side of the cleaning guide wheel 604. The cleaning guide wheel 604 is used to adapt to expansion joints of different widths and clean the inner wall of the expansion joint. At the same time, the cleaning plate 611 is driven by the transmission belt 608 to clean the dust-proof glass surface. Sliding grooves are provided on both sides of the lifting plate 8. The sliding plate 601 is slidably connected in the sliding groove, and two sliding rods 603 are connected in the sliding groove. A sliding hole is provided on the side of the sliding plate 601 away from the laser detection device 9. , the sliding rod 603 is slidably connected to the sliding hole, and a second spring 602 is sleeved on the outer surface of the sliding rod 603. The two sides of the second spring 602 are respectively connected to one side of the inner wall of the sliding groove and one side of the sliding plate 601. One side of the cleaning plate 611 is connected to two symmetrically arranged connecting rods, and one end of the two connecting rods away from the cleaning plate 611 is connected to a screw seat 612. The internal thread of the screw seat 612 is connected to a reciprocating screw 610. Both ends of the reciprocating screw 610 are rotatably connected to a fixed seat, and one side of the fixed seat is connected to the sliding plate 601 One side is connected, and the two reciprocating screws 610 are symmetrically distributed on both sides of the mounting groove. Both sides of the reciprocating screw 610 extend to the other side of the fixed seat and are connected to the driven wheel 609. Both sides of the sliding plate 601 are connected to the side plate 606. One side of the side plate 606 is connected to two mounting seats. The cleaning guide wheel 604 is rotatably connected between the two mounting seats through a rotating shaft. One end of the rotating shaft extends to the other side of the mounting seat and is connected to a driving wheel 607. A transmission belt 608 is connected between the driving wheel 607 and the driven wheel 609.

[0044] The specific implementation method is as follows: by setting a guide cleaning component 6, when the lifting plate 8 enters the expansion joint, the sliding plate 601 is outwardly fitted with the inner wall of the expansion joint under the cooperation of the second spring 602 and the sliding rod 603, and the laser detection device 9 arranged in the installation groove can monitor and detect the internal structure of the expansion joint through the dust-proof glass plate 605, and the support plate 1 moves along the extension direction of the expansion joint, and the cleaning guide wheel 604 cleans and dusts the inner wall of the expansion joint to a certain extent, and the cleaning guide wheel 604 drives the cleaning plate 611 to clean the dust-proof glass through the driving wheel 607, the transmission belt 608, the driven wheel 609, the reciprocating screw 610 and the screw seat 612. On the one hand, the second spring 602 drives the cleaning plate 611 to clean the dust-proof glass. The movable sliding plate 601 and the cleaning guide wheel 604 are adapted to the inner wall of the expansion joint, which can ensure that the laser detection device 9 is always in a vertical state with the inner wall of the expansion joint, and the laser detection device 9 is always in a suitable position with the position to be detected of the expansion joint, thereby improving the monitoring effect and accuracy of the expansion joint. On the other hand, the cleaning guide wheel 604 can clean the inner wall of the expansion joint to a certain extent during the movement, thereby improving the clarity of the area to be detected and ensuring the accuracy of the detection results. At the same time, the transmission belt 608 of the cleaning guide wheel 604 drives the cleaning plate 611 to clean the dust-proof glass, thereby ensuring the clarity of the probe of the laser detection device 9, avoiding dust and impurities from affecting the detection results, and improving the detection effect of the expansion joint.

[0045] The obstacle removal component 5 includes a fixed box 520, one side of the fixed box 520 is connected to one side of the lifting plate 8, a hollow tube 506 is rotatably connected in the fixed box 520, one side of the hollow tube 506 is connected to the rotating box 504, and one side of the rotating box 504 is distributed with a plurality of nozzles 507 that can swing back and forth in a circular array. Both sides of the nozzle 507 are hinged with a hinge seat, one side of the hinge seat is connected to one side of the rotating box 504, and one side of the nozzle 507 is hinged with a connecting rod 509, and the other side of the connecting rod 509 is connected to the rotating box 504. The end of the rotating box 504 is hinged with a slide rod 513, the other end of the slide rod 513 is connected to the extrusion wheel 511, one end of the nozzle 507 is connected to the connecting pipe 508, the other end of the connecting pipe 508 extends into the hollow tube 506 and is connected to a micro water pump 519, one side of the micro water pump 519 is connected to the inner wall of the hollow tube 506, one side of the rotating box 504 is connected to the protrusion 505, the outer peripheral side of the rotating box 504 is connected to the gear ring 514, and one side of the fixed box 520 is fixedly installed with a drive motor through a second mounting plate. The cam 514 is connected to the drive shaft 516 at one end and the gear 516 is meshed with the gear ring 514 at one end. The outer peripheral side of the rotating box 504 is connected to a plurality of fixed sleeves 510. The slide rod 513 is slidably connected to the fixed slide groove. The outer surface of the slide rod 513 is sleeved with a first spring 512. The two ends of the first spring 512 are respectively connected to one side of the fixed sleeve 510 and one side of the extrusion wheel 511. One side of the lifting plate 8 is connected to a fixed ring 517 through a fixed column. One side of the fixed ring 517 is connected to a plurality of extrusion blocks 518 in a circumferential array. The cross-section of the extrusion block 518 is trapezoidal. The extrusion block 518 periodically fits with the extrusion wheel 511. The top side of the support plate 1 is connected to the water tank 503. One side of the water tank 503 is connected to the delivery pipe 502. The other end of the delivery pipe 502 extends to the other side of the support plate 1 and is connected to the top of the fixed box 520. The end of the water tank 503 away from the delivery pipe 502 is connected to the liquid adding pipe 501.

[0046] The specific implementation method is as follows: by setting up the obstacle removal component 5, the driving motor 515 drives the rotating box 504 to rotate through the driving gear 516 and the gear ring 514, and the rotating box 504 drives the nozzle 507 and the fixed sleeve 510 to rotate, and the fixed sleeve 510 drives the nozzle 507 to swing back and forth around the hinge seat through the slide bar 513, the extrusion wheel 511, the fixed ring 517, the extrusion block 518, the first spring 512, the slide bar 513 and the connecting rod 509, and water enters the fixed box 520 from the water tank 503, and the micro water pump 519 transports the water flow to the nozzle 507 through the connecting pipe 508 and sprays it out through the nozzle 507, forming a jet to clean the inner wall of the expansion joint. The reciprocating swing of the nozzle 507 can increase the cleaning range and avoid the occurrence of cleaning dead corners, so that the dust accumulated in the expansion joint can be cleaned and the possible obstacles can be pushed away, thereby ensuring the smoothness of the detection and avoiding the influence of impurities and dust on the detection results.

[0047] The lifting assembly 7 includes a lifting motor 702, which is connected to the bottom of the support plate 1 through a first mounting plate. One end of the output shaft of the lifting motor 702 is connected to a lifting screw 703. The outer surface of one end of the lifting screw 703 is threadedly connected to the lifting plate 8. Telescopic rods 701 are connected to both sides of the bottom of the support plate 1. The other end of the telescopic rod 701 is connected to the top of the lifting plate 8, and the two telescopic rods 701 are symmetrically distributed on both sides of the lifting screw 703.

[0048] The specific implementation method is as follows: by setting up the lifting component 7, the staff starts the lifting motor 702, and the lifting motor 702 moves in the vertical direction through the lifting screw 703, the telescopic rod 701 and the lowering plate, and drives the laser detection device 9 to enter the appropriate position of the expansion joint through the lifting plate 8. By controlling the moving stroke of the lifting plate 8, the laser detection device 9 can penetrate into the expansion joints of different depths for monitoring, thereby improving the overall applicability of the device.

[0049] Working principle: When in use, the staff adjusts the distance between the lifting plate 8 and the support plate 1 according to the actual depth of the expansion joint. The staff starts the lifting motor 702, and the lifting motor 702 drives the lifting screw 703 to rotate. The lifting screw 703 cooperates with the telescopic rod 701 to drive the lifting plate 8 to move in the vertical direction, and drives the laser detection device 9 to the appropriate position of the expansion joint through the lifting plate 8.

[0050] When the lifting plate 8 enters the expansion joint, the sliding plate 601 expands outward under the cooperation of the second spring 602 and the sliding rod 603, and the sliding plate 601 drives the cleaning guide wheel 604 to fit the inner wall of the expansion joint. The laser detection device 9 arranged in the installation groove can monitor and detect the internal structure of the expansion joint through the dust-proof glass plate 605. Afterwards, the driving wheel 2 drives the support plate 1 to move along the extension direction of the expansion joint under the drive device 3. In this process, due to the contact and friction between the cleaning guide wheel 604 and the expansion joint, the cleaning guide wheel 604 cleans and removes dust on the inner wall of the expansion joint to a certain extent. At the same time, the cleaning guide wheel 604 rotates under the action of friction, and the cleaning guide wheel 604 drives the active wheel 607 to rotate. The active wheel 607 drives the driven wheel 609 to rotate through the transmission belt 608. The driven wheel 609 drives the reciprocating screw 610 to rotate. The reciprocating screw 610 drives the screw seat 612 to move, and the screw seat 612 drives the cleaning plate 611 to clean the dust-proof glass.

[0051] During the mobile detection process of the device, the driving motor 515 drives the driving gear 516 to rotate, the driving gear 516 drives the gear ring 514 to rotate, the gear ring 514 drives the rotating box 504 to rotate, the rotating box 504 drives the nozzle 507 and the fixed sleeve 510 to rotate, the fixed sleeve 510 drives the slide bar 513 to rotate, the slide bar 513 drives the extrusion wheel 511 to move on the fixed ring 517, and periodically fits with the extrusion block 518, and cooperates with the first spring 512 to realize the reciprocating motion of the slide bar 513, so that the slide bar 513 drives the nozzle 507 to swing back and forth around the hinge seat through the connecting rod 509. During this process, water enters the fixed box 520 from the water tank 503, and the micro water pump 519 transports the water flow to the nozzle 507 through the connecting pipe 508 and sprays it out through the nozzle 507, forming a jet to clean the inner wall of the expansion joint.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bridge expansion joint detection device, comprising a support plate (1), characterized in that: A lifting assembly (7) is provided at the bottom of the support plate (1), a lifting plate (8) is provided below the lifting assembly (7), guide cleaning assemblies (6) are provided on both sides of the lifting plate (8), and an obstacle removal assembly (5) is provided on one side of the lifting plate (8); The guide cleaning assembly (6) includes two symmetrically arranged sliding plates (601), the sliding plates (601) are slidably connected to one side of the lifting plate (8), a mounting groove is provided on the side of the sliding plate (601) away from the lifting plate (8), two symmetrically distributed laser detection devices (9) for detecting the expansion joint are fixedly installed in the mounting groove, a dustproof glass plate (605) for protecting the laser detection device (9) is connected inside the mounting groove, cleaning guide wheels (604) for fitting with the inner wall of the expansion joint are provided on both sides of the sliding plate (601), and a cleaning plate (611) for cleaning the dustproof glass plate (605) is transmission-connected to one side of the cleaning guide wheel (604), the cleaning guide wheel (604) is used to adapt to expansion joints of different widths and clean the inner wall of the expansion joint, and at the same time, the cleaning plate (611) is driven by the transmission belt (608) to clean the surface of the dustproof glass; One side of the cleaning plate (611) is connected to two symmetrically arranged connecting rods, one end of the two connecting rods away from the cleaning plate (611) is connected to a screw seat (612), the internal thread of the screw seat (612) is connected to a reciprocating screw (610), both ends of the reciprocating screw (610) are rotatably connected to a fixed seat, one side of the fixed seat is connected to one side of the sliding plate (601), and the two reciprocating screws (610) are symmetrically distributed on both sides of the installation groove; Both sides of the reciprocating screw (610) extend to the other side of the fixed seat and are connected to a driven wheel (609), both sides of the sliding plate (601) are connected to side plates (606), one side of the side plate (606) is connected to two mounting seats, the cleaning guide wheel (604) is rotatably connected between the two mounting seats via a rotating shaft, one end of the rotating shaft extends to the other side of the mounting seat and is connected to a driving wheel (607), and a transmission belt (608) is connected between the driving wheel (607) and the driven wheel (609).

2. A bridge expansion joint detection device according to claim 1, characterized in that: Sliding grooves are provided on both sides of the lifting plate (8), the sliding plate (601) is slidably connected in the sliding groove, and two sliding rods (603) are connected in the sliding groove, a sliding hole is provided on the side of the sliding plate (601) away from the laser detection device (9), the sliding rods (603) are slidably connected in the sliding hole, and a second spring (602) is sleeved on the outer surface of the sliding rod (603), and the two sides of the second spring (602) are respectively connected to one side of the inner wall of the sliding groove and one side of the sliding plate (601).

3. A bridge expansion joint detection device according to claim 1, characterized in that: The lifting assembly (7) includes a lifting motor (702), the lifting motor (702) is connected to the bottom of the support plate (1) through a first mounting plate, one end of the output shaft of the lifting motor (702) is connected to a lifting screw (703), the outer surface of one end of the lifting screw (703) is threadedly connected to the lifting plate (8), both sides of the bottom of the support plate (1) are connected to telescopic rods (701), the other end of the telescopic rods (701) is connected to the top of the lifting plate (8), and the two telescopic rods (701) are symmetrically distributed on both sides of the lifting screw (703).

4. A bridge expansion joint detection device according to claim 1, characterized in that: The obstacle removal assembly (5) comprises a fixed box (520), one side of the fixed box (520) is connected to one side of the lifting plate (8), a hollow tube (506) is rotatably connected in the fixed box (520), one side of the hollow tube (506) is connected to a rotating box (504), one side of the rotating box (504) is provided with a plurality of nozzles (507) capable of reciprocating swinging and distributed in a circumferential array, both sides of the nozzles (507) are hinged with hinged seats, one side of the hinged seat is connected to the rotating box (504), and the rotating box (504) is provided with a plurality of nozzles (507) capable of reciprocating swinging and distributed in a circumferential array. One side is connected, one side of the nozzle (507) is hinged with a connecting rod (509), the other end of the connecting rod (509) is hinged with a sliding rod (513), the other end of the sliding rod (513) is connected to an extrusion wheel (511), one end of the nozzle (507) is connected to a connecting pipe (508), the other end of the connecting pipe (508) extends into the hollow tube (506) and is connected to a micro water pump (519), one side of the micro water pump (519) is connected to the inner wall of the hollow tube (506).

5. A bridge expansion joint detection device according to claim 4, characterized in that: A protrusion (505) is connected to one side of the rotating box (504), a gear ring (514) is connected to the outer peripheral side of the rotating box (504), a driving motor (515) is fixedly mounted on one side of the fixed box (520) via a second mounting plate, one end of the output shaft of the driving motor (515) is connected to a driving gear (516), and one side of the driving gear (516) is meshed with the gear ring (514).

6. A bridge expansion joint detection device according to claim 4, characterized in that: The outer peripheral side of the rotating box (504) is connected to a plurality of fixed sliding sleeves (510), the sliding rod (513) is slidably connected in the fixed sliding groove, the outer surface of the sliding rod (513) is sleeved with a first spring (512), the two ends of the first spring (512) are respectively connected to one side of the fixed sliding sleeve (510) and one side of the extrusion wheel (511), the lifting plate (8) is connected to a fixed ring (517) through a fixed column on one side, and the fixed ring (517) is connected to a plurality of extrusion blocks (518) in a circular array on one side, the cross-section of the extrusion block (518) is trapezoidal, and the extrusion block (518) periodically fits the extrusion wheel (511).

7. The bridge expansion joint detection device according to claim 4, characterized in that: One side of the top of the support plate (1) is connected to a water tank (503), one side of the water tank (503) is connected to a delivery pipe (502), the other end of the delivery pipe (502) extends to the other side of the support plate (1) and is connected to the top of the fixed box (520), and the end of the water tank (503) away from the delivery pipe (502) is connected to a liquid addition pipe (501).

8. The bridge expansion joint detection device according to claim 1, characterized in that: A control device (4) is connected to one side of the top of the support plate (1), and driving wheels (2) are connected to all four sides of the bottom of the support plate (1), and a driving device (3) is provided on one side of the driving wheel (2).

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