A variable-section bridge pier detection structure and detection method thereof

Abstract

The present invention discloses a variable-section bridge pier inspection structure and inspection method. The variable-section bridge pier inspection structure includes a clamping bearing device installed on the bridge pier for support, a drive control device installed on the clamping bearing device, a rotating device installed under the clamping bearing device, an angle adjustment device installed on the rotating device, a movable device installed on the angle adjustment device, an auxiliary clamping device installed on the movable device, and a detection device installed on the auxiliary clamping device and used to detect bridge pier defects. The present invention overcomes the shortcomings of the existing technology and provides a detection structure and detection method specifically for variable-section bridge pier inspection. This structure solves the problems of low efficiency and high risk of existing manual inspection.

Description

Technical Field

[0001] The present invention relates to the field of underwater bridge pier detection, and in particular to a variable-section bridge pier detection structure and a detection method thereof. Background Art

[0002] A bridge pier generally refers to the intermediate supporting structure of a bridge with two or more spans, excluding the abutments at each end that connect to the embankment. A bridge pier primarily consists of a cap and a pier body. A bridge abutment primarily consists of a cap and a pier body. Piers are categorized as solid, column, and frame piers. Based on their planar shape, they can be rectangular, pointed, or circular. Piers can be constructed from materials such as wood, stone, concrete, and steel. Piers support the span structure, and their safety directly impacts the overall bridge.

[0003] During bridge pier inspection, more attention is paid to fixed-section piers and water-based piers. However, the bottoms of variable-section piers are eroded by water all year round. Once problems occur, they will bring major safety hazards and may even cause bridge collapse in severe cases.

[0004] Existing bridge pier detection devices have the following defects: 1. It is difficult to detect variable-section bridge piers, and only one type of bridge pier or a part of the bridge pier can be detected; 2. Electric motors are used to detect the underwater part of the bridge pier, and it is very complicated to waterproof the electric motors; 3. The detection device is not very robust when affected by water flow. Summary of the Invention

[0005] In order to achieve the above-mentioned purpose, the present invention provides a variable-section bridge pier detection structure and a detection method thereof, which solve the problems existing in the prior art.

[0006] The technical solution adopted by the present invention is that the clamping bearing device includes a fixed plate fixedly installed on the bridge pier and projected in a circular structure on the horizontal plane, a rotating device installed below the fixed plate and a driving control device installed on the fixed plate, the driving control device includes a first thrust motor, a second thrust motor, a rotating motor, a hydraulic cylinder and a hydraulic oil circuit, and the driving control device is always in an above-water position during the detection process, just like the clamping bearing device; the rotating device includes a driving gear, an arc-shaped rack installed on the driving gear and meshing with the driven gear, and a pair of symmetrically distributed pulling gears are installed on the arc-shaped rack. Rod, a pair of sliders are installed on the pull rod, and the guide rails are installed under the sliders, including a support frame supporting the above-mentioned mechanism; the angle adjustment device includes a connecting end plate installed on the slider by a fixing bolt, a hydraulic push rod is located on the lower side of the connecting end plate, a dynamic cam is installed at the front end of the hydraulic push rod and can make circular motion around the hinge, a compression spring washer is installed on the upper side of the dynamic cam, a clamping spring is installed on the compression spring washer and connected to the upper side of the end plate with a mounting hole, and a roller makes circular motion along the protruding end of the dynamic cam, and the clamping spring always maintains a clamped state and always pulls the dynamic cam.

[0007] The movable device includes a retractable multi-link mechanism installed on the slider and having a certain inclination angle with the guide rail, a spherical roller installed on the guide groove through a passive push rod with a slide groove and movable along the guide groove; the auxiliary clamping device includes a clamping assembly with a square structure located below the movable device, a guide groove with an arc-shaped structure located below the spherical roller, and a guide shaft installed on both sides of a pair of V-shaped clamping blocks and serving as a connecting guide.

[0008] A preferred variable-section bridge pier detection structure adopted by the present invention is characterized in that the drive control device is located on the clamping bearing device, the rotating motor is located directly above the driving gear, and the hydraulic oil circuit connects the hydraulic cylinder and the hydraulic push rod; the driving gear and the driven gear are symmetrically distributed about the Y direction, and the arc-shaped rack and the guide rail are located at the positions of the support frames at both ends for splicing. The base is installed first, and then the side is installed to ensure that the base reference plane and the side reference plane are in the same plane. The guide rail is installed and fixed on the base, and the screws are tightened to ensure that the gap between the two sections of the guide rail is small enough.

[0009] A preferred variable-section bridge pier detection structure adopted by the present invention is characterized in that an electric push rod is installed on the movable device, and a pulley is installed on the telescopic rod of the electric push rod; the movable device includes an upper fixed rod installed in the mounting hole, a limiting connecting rod installed at both ends of the upper fixed rod, and the limiting connecting rod connects the second rocker arm and the first rocker arm in sequence along the X direction, and a hinge point A is provided at 1 / 4 of the second rocker arm from top to bottom, one end of the active thrust rod with a slide is hinged on the connecting rod, and a hinge point A is provided in the middle part of the active thrust rod with a slide, and the active thrust rod with a slide and the second rocker arm are connected through the hinge point A, along the connecting rod, the active thrust rod with a slide and the passive thrust rod with a slide are symmetrically distributed, and the passive thrust rod with a slide and the second rocker arm are hinged at the hinge point B; a slide is provided on the active thrust rod with a slide, and a plurality of threaded holes are provided at the bottom of the slide, and fixing bolts are installed by selecting the length required for the working condition.

[0010] An optimal variable-section bridge pier detection structure adopted by the present invention is characterized in that the roller is embedded in the guide groove, the upper part of the roller is hinged to the rotating connecting block to form a hinge point, and the rotating connecting block always keeps the roller vertically downward during movement; the inner surface of the guide groove is covered with ceramic, and the spherical roller is also made of ceramic material.

[0011] A preferred variable-section bridge pier detection structure adopted by the present invention is characterized in that the auxiliary clamping device is a pair of V-shaped clamping blocks connected by two parallel guide shafts, the connection between the guide shaft and the V-shaped clamping block is an oil-free bushing, a brush is installed inside the V-shaped clamping block close to the bridge pier, the V-shaped clamping block is provided with a guide groove along the Z direction, which is connected to the roller, and the guide rail structure composed of the guide shaft and the lubricating oil guide shaft is installed on the guide shaft and located on the side plate. The hexagonal set screw

[0012] A preferred variable-section bridge pier detection structure adopted by the present invention is characterized in that the detection device includes a lighting source installed on an auxiliary clamping device, a brush installed on the inner side of a V-shaped clamping block, and two industrial waterproof cameras installed on the side of the V-shaped clamping block close to the bridge pier, and a lighting source is installed next to each camera.

[0013] The detection method of the present invention is as follows:

[0014] S1 Install the inspection structure: Install the clamping bearing device on the bridge pier, and install the remaining devices in sequence so that the bridge pier is located within the two clamping devices;

[0015] S2 starts the drive control device: Initialize the device, start the hydraulic cylinder to adjust the angle to the appropriate angle for the variable-section bridge pier to be measured, start the two thrust motors, and the active thrust rod with a slide moves in opposite directions to the passive thrust rod with a slide. The first rocker and the second rocker move downward in a circular arc, driving the movable device to move down to the underwater part of the bridge pier and driving the two V-shaped clamping blocks to expand.

[0016] S3 detection: Start the rotating motor, the active gear, the passive gear and the rack engage, driving the auxiliary clamping device to rotate. The brush located in the V-shaped clamping block rotates to clean the debris in the underwater part of the pier. At the same time, the detection device completes the detection work as it rotates.

[0017] S4 completes the inspection: the movable device continuously descends during the inspection process, and the inspection device inspects various parts of the bridge pier until the inspection of the bridge pier is completed and ends.

[0018] The present invention has beneficial effects: 1. The detection device has high stability after installation and can reduce the impact of water flow; 2. When detecting variable-section bridge piers, the detection device can adjust the angle of the movable device to adapt to the bridge pier to be detected, so that the detection module moves in close contact with the bridge pier, which is convenient for detecting the bridge pier; 3. The detection device can synchronously drive the expansion of the auxiliary clamping device during the descent process, and there is no need to carry out complex control of the time sequence of motor start-up; 4. The angle adjustment device of the present application can spontaneously provide a pulling force opposite to the spring compression direction, so that the pressure at the front end of the hydraulic push rod becomes smaller; 5. The present invention does not require waterproofing of the motor, and the drive control devices are all located on the water surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of part A.

[0022] Figure 3 It is an overall top view of the present invention.

[0023] Figure 4 It is a top view of the rotating device of the present invention.

[0024] Figure 5 It is a front view of the rotating device of the present invention.

[0025] Figure 6 Schematic diagram of the angle adjustment device of the present invention.

[0026] Figure 7 It is a structural schematic diagram of the movable device of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the auxiliary clamping device of the present invention.

[0028] Figure 9 It is a top view of the auxiliary clamping device and the detection device of the present invention.

[0029] Figure 10 Flow chart of the detection method of the present invention.

[0030] In the figure, 1-drive control device, 101-first thrust motor; 102-second thrust motor; 103-hydraulic cylinder; 104-rotating motor; 105-control device; 106-hydraulic oil circuit;

[0031] 2-clamping bearing device, 201-fixing plate; 202-fastening bolt;

[0032] 3-rotating device, 301-guide rail; 302-passive gear; 303-slider; 304-arc rack; 305-driving gear; 306-pull rod; 307-support frame;

[0033] 4 - Angle adjustment device, 401 - Compression spring washer; 402 - End plate with mounting holes; 403 - Roller; 404 - Moving cam; 405 - Hydraulic push rod; 406 - Fixing bolt; 407 - Connecting end plate; 408 - Living hinge A; 409 - Compression spring; 410 - Living hinge B;

[0034] 5-movable device, 501-active thrust rod with slide; 502-upper fixed rod; 503-limit connecting rod; 504-first rocker; 505-connecting rod; 506-passive thrust rod with slide; 507-lower fixed rod; 508-second rocker; 509-rotating connecting block; 510-roller; 511-electric push rod; 512-electric cylinder baffle;

[0035] 6- auxiliary clamping device, 601- bottom plate; 602- guide shaft; 603- V-shaped clamping block; 604- side plate; 605- connecting bolt; 606- guide groove;

[0036] 7-Detection device, 701-Industrial waterproof camera; 702-Brush. DETAILED DESCRIPTION

[0037] 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 creative efforts are within the scope of protection of the present invention.

[0038] Example 1:

[0039] like Figures 1 to 10 As shown, a variable-section pier detection structure and a detection method thereof include a pier detection sensor, a clamping bearing device 2 installed on the pier and used for support, a driving control device 1 installed on the clamping bearing device 2 and located above the clamping bearing device 2, a rotating device 3 installed below the clamping bearing device 2 and rotatable, an angle adjustment device 4 installed on the rotating device 3 and used for adjusting the angle of a movable device 5, a movable device 5 installed on the angle adjustment device 4 and capable of telescopic movement, an auxiliary clamping device 6 installed on the movable device 5 and capable of amplifying as the movable device 5 is extended, and a detection device 7 for detecting pier defects installed on the auxiliary clamping device 6.

[0040] The drive control device 1 is installed above the clamping bearing device 2. The drive control device 1 includes a first thrust motor 101, a second thrust motor 102, a hydraulic cylinder 103, a rotating motor 104 and a hydraulic oil circuit 105. The drive control device 1, like the clamping bearing device 2, is always above the water surface of the bridge pier to be inspected during the inspection process.

[0041] The clamping bearing device 2 includes a pair of fixed plates 201 with circular structures distributed along the X direction installed on the bridge pier. The two pairs of fixed plates 201 are fixed to the bridge pier with bolts, and the rotating device 3 is installed below the fixed plates.

[0042] The rotating device 3 is installed to include a driving gear 305. One end of the driving gear 305 shaft is connected to the rotating motor 104 and the other end is connected to the bearing installed on the housing with an end cover. The gear shaft is fixed with a double support fixed type to ensure that both ends do not move. The guide rail 301 and the arc rack 304 are fixed by being installed on the support frame.

[0043] The end faces of both ends of the arc-shaped rack 304 are processed into a half-tooth bottom and a negative tolerance between the tooth end face, so as to connect with the half-tooth bottom of the end face of the next rack to form a full tooth. The arc-shaped rack 304 ensures the integrity of the circular motion by splicing. A pair of symmetrically distributed pull rods 306 are installed on the arc-shaped rack 304. A pair of sliders 303 are fixed on the pull rods 306 with screws. Below the sliders 303 is the guide rail 301. The rotating motor 104 starts to drive the active gear 305 to rotate. The rotation of the active gear 305 drives the rotation of the arc-shaped rack 304 and the driven gear 302. The pull rod 306 follows the rotation of the arc-shaped rack 304 to drive the slider 303 to make a circular motion on the guide rail 301, preparing for the detection device 7 to clean the bridge piers and take pictures.

[0044] The movable device 5 includes an upper fixed rod 502 installed in the mounting hole. The upper fixed rod 502 is inserted into the mounting hole and installed by bolts. Two threaded holes are set at one end of the upper fixed rod 502. First, a sleeve is put on one side of the limiting connecting rod 503 and screwed into the threaded hole on the upper fixed rod 502. The second rocker 508 is put on the limiting connecting rod 503 and the sleeve is put on the other side of the limiting connecting rod 503 and screwed into the upper fixed rod 502. The two sleeves are set to prevent the second rocker 504 from moving along the X direction on the limiting connecting rod 503.

[0045] The connection method of the first rocker 504 is the same as the installation method of the second rocker 508. Three sleeves are installed on the first rocker 504 to ensure that the first rocker will no longer move along the X direction on the limiting connecting rod 503. One end of the first rocker 504 and the second rocker 508 are connected to the limiting connecting block 503, and the other end is installed on the connecting rod 505. A pin shaft with a threaded through hole is provided and screws are installed at both ends.

[0046] The electric push rod 511 is located above the upper fixed rod 502 and is a telescopic rod. A pulley is provided at the end of the telescopic rod. A slide is provided on the active thrust rod 501 with a slide. The end of the slide is set to an inclined shape to facilitate the pulley to enter the slide. Under the action of the electric push rod 511, the active thrust rod 501 with the slide follows the electric push rod 511 to move back and forth, preparing for the up and down movement of the movable device 5.

[0047] The active thrust rod 501 with a slide groove is installed on the connecting rod 505 at one end away from the slide groove. A hinge point is set at 1 / 4 of the distance from the connecting rod, and a pin shaft with a threaded through hole is set for connection. The upper and lower parts of the movable device 5 are mirror-symmetrical about the connecting rod 505.

[0048] The angle adjustment device 4 is mounted on the slider 303 by four fixing bolts 406 to connect the end plate 407. The hydraulic push rod 405 is located on the lower side of the connecting end plate 407. The movable cam 404 is installed at the front end of the hydraulic push rod 405 and can move in an arc around the hinge. The movable hinge A408 and the movable hinge B410 are fixed by the hinge pin shoulder hexagonal nut. The washer 401 for the compression spring is installed on the upper side of the movable cam 404. Figure 6 As shown, the compression spring 409 is installed on the compression spring washer 401 and connected to the upper side of the end plate 402 with the mounting hole. The compression spring 409 always maintains a compression state during operation, giving an upward force along the movable cam 404 to offset the downward force along the movable cam 404 caused by the hydraulic push rod 405 pushing the movable cam 404. The roller 403 makes an arc motion along the raised end of the movable cam 404. A rubber layer is provided on the roller 403. The rubber layer plays a buffering role and makes the roller 403 fit better with the movable cam 404, increasing a certain load-bearing capacity. A threaded hole is provided in the mounting hole of the end plate 402 with the mounting hole, and the upper fixing rod 502 is inserted for fixing.

[0049] like Figure 2 The movable device 5 and the auxiliary clamping device 6 shown are installed together through the roller 510 and the rotating connecting block 509. The rotating connecting block 509 is installed on one side of the passive push rod 506 with a slide groove and is provided with a hinge. The rotating connecting block 506 can rotate 120o around the passive push rod with a slide groove. The roller 510 and the rotating connecting block 509 are connected by bolts, and the bottom ends of the roller 510 and the rotating connecting block 509 are always kept horizontally downward.

[0050] The movable device 5 and the auxiliary clamping device 6, the first thrust motor 101 and the second thrust motor 102 arranged on the movable device 5 push the active thrust rod 501 with the slide groove to move. Here, the downward movement of the movable device 5 is used as an example for explanation: the first thrust motor 101 and the second thrust motor 102 are started, and the active thrust rod 501 with the slide groove is driven to move upward. Figure 1 It moves to the left in the direction shown, and the first rocker 504 and the second rocker 508 connected by the active thrust rod 501 with a slide follow the oblique downward movement, and the passive thrust rod 506 with a slide moves to the right under the force of the rod movement, and the rotating connecting block 509 always remains underwater and downward, and the roller 510 follows the passive thrust rod 506 with a slide to move to the right. Under the action of the guide groove 606, the V-shaped clamping block 603 will expand to adapt to the right movement of the roller 510. At this time, the movable device 5 moves downward, and the V-shaped clamping block 603 in the auxiliary clamping device 6 makes an expansion movement. The variable-section bridge pier to be tested is large at the bottom and small at the top. The device meets the requirements of moving downward while expanding the clamping diameter of the auxiliary clamping device 6.

[0051] The detection device 7 includes a lighting source installed on the auxiliary clamping device 6, a brush 702 installed on the inner side of the V-shaped clamping block 603, and two industrial waterproof cameras 701 installed on the side of the V-shaped clamping block 603 close to the bridge pier, and a lighting source is installed next to each camera.

[0052] like Figure 8 As shown, the auxiliary clamping device 6 is provided with two V-shaped clamping blocks 603 which are movable and can adapt to cylindrical piers of different diameters.

[0053] The movable device 5 can synchronously drive the auxiliary clamping device 6 to expand during the descent process. The motor driving the movable device 5 is above the water surface, so there is no need to consider the waterproofing of the motor.

[0054] Example 2:

[0055] A detection method for a variable-section bridge pier detection structure as described in Example 1, S1: Install the detection structure: Install the clamping bearing device 2 on the bridge pier, install the fixing plate 201 on the bridge pier with fastening bolts 202, install the drive control device 1 on the clamping bearing device 2, install the rotating device 3 below the clamping bearing device 2, install the angle adjustment device 4 on the slider 303 and fix it with fixing bolts 406, insert the upper fixing rod 502 into the end plate 402 with the mounting hole and install and fix it with bolts, after the movable device 5 is installed, connect the roller 510 above the auxiliary clamping device 6 and the rotating connecting block 509;

[0056] S2 starts the drive control device: initialization, including adjusting the angle, setting the detection distance, setting the rotation speed, setting the descent speed and setting the rotation time, descent and rotation, starting the hydraulic cylinder 103, driving the hydraulic push rod 405 through the hydraulic oil circuit 106 to adjust the movable device 5 to an angle suitable for the detected bridge pier, starting the first thrust motor 101 and the second thrust motor 102 to drive the electric push rod 511, pushing the active thrust rod 501 with the slide groove to move, and extending the movable device 5 underwater. The active thrust rod 501 with the slide groove moves leftward. The lateral movement drives the second rocker 508 to move in a circular arc to the right, and drives the first rocker 504 to move diagonally downward. That is, when the active thrust rod 501 with the slide groove moves to the right, the passive thrust rod 506 with the slide groove moves in a circular arc to the left. The passive thrust rod 506 with the slide groove transmits a force to move outward along the bridge pier to the roller 510 through the rotating connecting block 509. When the movable device 5 drives the auxiliary clamping device 6 to move downward, the roller 510 drives the V-shaped clamping block 603 to expand outward along the guide shaft 602 along the bridge pier.

[0057] S3 Inspection: At this time, the auxiliary clamping device 6 is clamped on the underwater bridge pier. The rotating motor 104 is started. The main shaft of the rotating motor 104 drives the driving gear 305 to rotate, driving the arc-shaped rack 304 to rotate. At this time, the pull rod 306 on the arc-shaped rack 304 drives the slider 303 to move. The start of the rotating motor 104 drives the slider 303 to perform a circular motion, causing the auxiliary clamping device 6 to also perform a circular motion. The brush 702 can remove debris on the underwater bridge pier while performing a circular motion on the bridge pier. The underwater detection device 7 takes pictures and completes the detection work as it rotates.

[0058] S4 completes the inspection: the movable device 5 descends according to the set inspection distance during the inspection process, and the inspection device 7 inspects various parts of the bridge pier until the inspection of the bridge pier is completed and ends.

[0059] The control system of this application utilizes a stable programmable numerical control (PLC) system. This system automatically controls the drive control device, clamping and supporting device, rotating device, angle adjustment device, movable device, auxiliary clamping device, and detection device. Based on the actual conditions of the variable-section bridge pier to be inspected, the following features are configured: a hydraulic cylinder drives the adjustment of the movable device's tilt angle, a first thrust motor and a second thrust motor adjust the required descent or ascent distance, and a rotary motor drives the rotation of the auxiliary clamping device. The control system includes calibration functions, breakpoint memory, and arc protection.

[0060] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A variable-section bridge pier detection structure, comprising a drive control device (1), a clamping bearing device (2), a rotating device (3), an angle adjustment device (4), a movable device (5), an auxiliary clamping device (6), and a detection device (7), wherein the drive control device (1) is fixedly mounted on the clamping bearing device (2), the rotating device (3) is mounted directly below the clamping bearing device (2), the angle adjustment device (4) is connected to both sides of the rotating device (3), the movable device (5) is fixedly mounted on the angle adjustment device (4), the auxiliary clamping device (6) is mounted below the movable device (5), and the detection device (7) is mounted on the auxiliary clamping device (6); The drive control device (1) comprises a first thrust motor (101), a second thrust motor (102), a hydraulic cylinder (103), a rotary motor (104), a control device (105) and a hydraulic oil circuit (106); the first thrust motor (101) and the second thrust motor (102) are mounted in parallel on an electric push rod (511); the hydraulic cylinder (103) and the control device (105) are fixedly mounted on a clamping bearing device (2); the hydraulic cylinder (103) is connected to the hydraulic push rod (405) via the hydraulic oil circuit (106); and the main shaft of the rotary motor (104) is connected to a driving gear (305); The clamping bearing device (2) comprises a fixing plate (201) and fastening bolts (202), and both ends of the fixing plate (201) are fixedly mounted on the bridge pier by fastening bolts (202); The rotating device (3) comprises a guide rail (301), a passive gear (302), a slider (303), an arc-shaped rack (304), a driving gear (305), a pull rod (306) and a support frame (307); the driving gear (305) is connected to the main shaft of the rotating motor (104); the arc-shaped rack (304) is installed on the driving gear (305) and meshes with the passive gear (302); a pair of pull rods (306) are installed on both sides of the arc-shaped rack (304); the other end of the pull rod (306) is connected to the slider (303); the guide rail (301) is installed below the slider (303); the support frame (307) supports the passive gear (302), the guide rail (301) and the arc-shaped rack (304); The angle adjustment device (4) includes a washer (401) for a compression spring, an end plate (402) with a mounting hole, a roller (403), a movable cam (404), a hydraulic push rod (405), a fixing bolt (406), a connecting end plate (407), a movable hinge A (408), a compression spring (409) and a movable hinge B (410), wherein the connecting end plate (407) is connected to the slider (303) via the fixing bolt (406) and is located at the connecting end plate (407). ) is a hydraulic push rod (405) on the lower side, a movable cam (404) is installed at the front end of the hydraulic push rod (405) and can move in an arc around a movable hinge B (410), a compression spring washer (401) is installed on the upper side of the movable cam (404), one end of the compression spring (409) is installed on the compression spring washer (401) and the other end is connected to the end plate (402) with a mounting hole, and a roller (403) moves in an arc along the raised end of the movable cam (404); The movable device (5) comprises an active thrust rod (501) with a slide groove, an upper fixed rod (502), a limit connecting rod (503), a first rocking rod (504), a connecting rod (505), a passive thrust rod (506) with a slide groove, a lower fixed rod (507), a second rocking rod (508), a rotating connecting block (509), a roller (510), an electric push rod (511) and an electric cylinder baffle (512), the electric cylinder baffle (512) being installed on the rear side of the electric push rod (511) and fixedly installed on the upper fixed rod (502), and the electric cylinder baffle (512) being installed on the upper fixed rod (502). The end plate (402) with a hole is an upper fixed rod (502), and the limit connecting rod (503) is connected to the upper fixed rod (502) and located on the same plane; each connected part on the fixed rod is threadedly connected, and the electric push rod (511) is located above the upper fixed rod (502), and a pulley is installed on the end of the electric push rod (511); the active thrust rod (501) with a slide groove is connected to the end of the electric push rod (511), and the roller (510) is installed on the guide groove (606) through a rotating connecting block (509) and is slidable; The auxiliary clamping device (6) comprises a bottom plate (601), a guide shaft (602), a V-shaped clamping block (603), a side plate (604), a connecting bolt (605) and a guide groove (606); the V-shaped clamping block (603) is located below the roller (510) and has a V-shaped structure; the two V-shaped clamping blocks (603) are symmetrically distributed on both sides of the bridge pier; the guide shafts (602) are installed on both sides of the two V-shaped clamping blocks (603); the guide shafts (602) connect the side plates (604) at both ends; the bottom plate (601) is connected to the side plates (604) and supports the auxiliary clamping device (6); the guide groove (606) is a circumferential structure and is located on the V-shaped clamping block (603); The detection device (7) comprises two industrial waterproof cameras (701) mounted on an auxiliary clamping device (6), and a brush (702) mounted on the inner side of a V-shaped clamping block (603).

2. The variable cross-section bridge pier detection structure according to claim 1, characterized in that: The driving control device (1) is installed above the clamping bearing device (2), and the slider (303) is installed on the guide rail (301) and is connected to the pull rod (306) at one end and the angle adjustment device (4) at the other end.

3. The variable cross-section bridge pier detection structure according to claim 1, characterized in that: The compression spring (409) is connected to the end plate (402) with the mounting hole and is always kept in a compression state with the movable cam (404); the protruding end of the movable cam (404) is in contact with the roller (403) and is kept in a compression state; the angle adjustment device (4) has an adjustable angle range of 0 o to 45 o .

4. The variable cross-section bridge pier detection structure according to claim 1, characterized in that: The upper fixed rod (502) in the movable device (5) is connected to two limit connecting rods (503), and the active thrust rod (501) with a slide groove is installed on the inner side of the upper fixed rod (502) and in contact with the electric push rod (511). The active thrust rod (501) with a slide groove has a slide groove, and the first rocker (504) is installed on the right limit connecting rod (503) and the end of which can move in an arc. The second rocker (504) is installed on the left limit connecting rod (503) and connected to the active thrust rod (501) with a slide groove. The second rocker (508) is installed on the first rocker (504) and the second rocker (508) and divides the movable device (5) into two symmetrical upper and lower parts. The passive push rod (506) with a slide groove is installed on the connecting rod (505) and is parallel to the active thrust rod (501) with a slide groove. The lower fixed rod (507) is installed outside the passive push rod (506) with a slide groove and is parallel to the upper fixed rod (502). The rods of the above-mentioned movable device (5) are connected with threaded bolts.

5. The variable cross-section bridge pier detection structure according to claim 1, characterized in that: The roller (510) is mounted on the rotating connection block (509) and is located in the guide groove (606). The roller (510) can roll along the guide groove (606) and is fixed in the guide groove (606) and cannot be removed.

6. The variable cross-section bridge pier detection structure according to claim 1, characterized in that: The V-shaped clamping blocks (603) are arranged symmetrically about the bridge pier and have an inclined angle of 25 o , the two guide grooves (606) are arc-shaped and well lubricated.

7. A detection method for the variable cross-section bridge pier detection structure according to claim 1, characterized in that: The detection steps are as follows: S1: Install the test structure: install the clamping bearing device (2) on the bridge pier, and install the remaining devices in sequence so that the bridge pier is located within the two clamping devices; S2 starts the driving control device: initializes the device, starts the hydraulic cylinder (103) to drive the adjustment angle to an angle suitable for the variable-section bridge pier to be measured, starts the first thrust motor (101) and the second thrust motor (102), the active thrust rod (501) with the slide groove and the passive thrust rod (506) with the slide groove move in opposite directions, the first rocker (504) and the second rocker (508) move downward in an arc, drive the movable device (5) to move down to the underwater part of the bridge pier, and drive the two V-shaped clamping blocks (603) to open; S3 detection: start the rotating motor (104), the driving gear (305), the driven gear (302) and the arc-shaped rack (304) are meshed, driving the auxiliary clamping device (6) to rotate, and the brush (702) located in the V-shaped clamping block (603) follows the rotation to clean the debris in the underwater part of the pier, and the detection device (7) completes the detection work as it rotates; S4 completes the inspection: the movable device (5) continuously descends during the inspection process, and the inspection device (7) inspects various parts of the bridge pier until the inspection of the bridge pier is completed and ends.

Images