A bridge crack detection device

Abstract

The present invention relates to the technical field of bridge detection, and in particular to a bridge crack detection device, comprising a fixed shaft, a telescopic mechanism, an orienting plate, an adjusting mechanism and a displacement meter, wherein the fixed shaft is arranged in the middle of the crack and is perpendicular to the plane where the crack is located, the telescopic mechanism is arranged on the fixed shaft and is located in the middle of the telescopic mechanism, the telescopic mechanism extends in the radial direction of the fixed shaft, and the telescopic mechanism can be inserted into the crack and abut against two side surfaces in the crack width direction, and the orienting plate is arranged on the fixed shaft to rotate around the axis of the fixed shaft. Through the coordinated arrangement of the telescopic mechanism and the crack, compared with the existing installation method of drilling holes on both sides of the crack for displacement meters, the bridge crack detection device can shorten the distance between the two installation points, so that the two installation points are in the crack to be detected, and avoid the appearance of new cracks between the installation points and the crack to be detected, which may cause errors in the detection results.

Description

Technical Field

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

[0002] As an important carrier connecting two large span locations, bridges will generate internal stresses that will be transmitted to some weak parts along the bridge structure after long-term exposure to the sun, rain and load operation. If the extension direction of the surface cracks is perpendicular to the structural bearing surface, the damage will be the greatest. Therefore, it is necessary to regularly measure the length and width of the cracks on the bridge surface. The commonly used detection device is a vibrating wire displacement meter.

[0003] The vibrating string displacement meter detects the displacement change of the structure by measuring the vibration frequency of the vibrating string. It has the advantages of high precision, good stability, and fast response speed. It is suitable for long-term measurement of the opening and closing degree (deformation) of expansion joints of hydraulic structures or other concrete structures. However, the existing vibrating string displacement meter is installed by manually punching holes on the structure. The accuracy of manual drilling is low, and the distance between the installation hole and the crack is inconsistent, which easily leads to inaccurate displacement measured by the vibrating string displacement meter; the existing installation method detects the displacement change of the crack between two installation points. When a new crack appears between the two installation points, the new crack may affect the width of the crack to be detected but does not affect the distance between the two installation points, or the new crack may cause the displacement change of the two installation points but does not affect the width of the crack to be detected, which easily leads to inaccurate detection results of the vibrating string displacement meter for the crack to be detected. Summary of the invention

[0004] Based on this, it is necessary to provide a bridge crack detection device to address the problem that the detection results of the current vibrating-wire displacement meter are prone to deviation.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A bridge crack detection device comprises a fixed shaft, a telescopic mechanism, an oriented plate, an adjustment mechanism and a displacement meter, wherein the fixed shaft is arranged in the middle of the crack and is perpendicular to the plane where the crack width direction is located, the telescopic mechanism is arranged on the fixed shaft and is located in the middle of the telescopic mechanism, the telescopic mechanism extends in the radial direction of the fixed shaft and can be inserted into the crack and abut against two side surfaces in the crack width direction; the oriented plate is arranged on the fixed shaft to rotate around the axis of the fixed shaft and can be stationary relative to the fixed shaft; there are two adjustment mechanisms, the two adjustment mechanisms are symmetrically arranged about the fixed shaft, each adjustment mechanism comprises a linkage component, a steering component and a clamping block, the linkage component is slidably arranged on the oriented plate in the radial direction of the fixed shaft, and the two linkage components are located on both sides of the fixed shaft, the steering component is arranged on the telescopic mechanism, the steering component is used to connect the linkage component and the telescopic mechanism, and transmit the telescopic amount of the telescopic mechanism in the crack width direction to the linkage component, the clamping block is slidably arranged on the linkage component in the radial direction of the fixed shaft, and the clamping block can be stationary relative to the linkage component; the displacement meter is located between the two clamping blocks, and the two ends of the displacement meter are respectively connected to the two clamping blocks.

[0007] Preferably, the telescopic mechanism includes a first clamping block, a second clamping block, a gear, a first tooth plate, a second tooth plate and two clamping plates, the first clamping block and the second clamping block are connected to each other in a relative sliding manner along a first direction, one end of the fixed shaft is slidably arranged on the first clamping block along the first direction, the first direction is perpendicular to the fixed shaft, the two adjusting mechanisms are arranged along the first direction, the gear sleeve is arranged on the fixed shaft, and the gear is rotatably connected to the fixed shaft, the first tooth plate is fixedly mounted on the first clamping block, the second tooth plate is fixedly mounted on the second clamping block, the first tooth plate and the second tooth plate are located on both sides of the gear, and the first tooth plate and the second tooth plate are both meshed with the gear, a first spring is provided between the first clamping block and the second clamping block, the two ends of the first spring are respectively connected to the first clamping block and the second clamping block, the two clamping plates are respectively mounted on the first clamping block and the second clamping block, and the two clamping plates and the fixed shaft are located on both sides of the first clamping block in the axial direction of the fixed shaft.

[0008] Preferably, each linkage assembly includes a slider and a slide column, a spacing is provided between the directional plate and the first block, a second groove is provided on a side of the directional plate away from the first block, the slider is slidably arranged in the second groove along the radial extension direction of the fixed axis, a first slide groove is provided on a side of the slider away from the directional plate, a clamping block is slidably arranged in the first slide groove along the direction in which the slider slides in the second groove, a first stud is provided on the slider, the first stud is threadedly connected to the slider, and the first stud can abut against the clamping block, one end of the slide column is fixedly installed on a side of the slider close to the first block, the slide column passes through the directional plate and is slidably connected to the directional plate, and the other end of the slide column is connected to the steering assembly.

[0009] Preferably, one steering assembly is arranged on the first block, and the other steering assembly is arranged on the second block, and a first groove is provided on a side of the first block and the second block close to the directional plate; each steering assembly includes a gear disk and a locking portion, the gear disk is rotatably arranged in the first groove of the first block or the second block, and the rotation axis of the gear disk is parallel to the rotation axis of the fixed shaft, the locking portion is arranged on the first block or the second block on which the gear disk is installed, and is used to control whether the gear disk rotates in the first groove, a through groove is provided on the gear disk, the through groove passes through the center of the gear disk and extends along the radial direction of the gear disk, and the end of the sliding column away from the sliding block is slidably arranged in the through groove.

[0010] Preferably, each locking portion includes a top block, an ear plate and a second stud, and a third groove is provided on the surface of the first card block and the second card block, the third groove on the first card block is connected to the first groove, and the third groove on the second card block is connected to the first groove, a top block is slidably arranged in a third groove, and the top block can abut against the circumferential surface of the toothed disk in the corresponding first groove; the two ear plates in the two locking portions are respectively fixedly installed on the surface of the first card block and the second card block where the third groove is provided, each second stud passes through the ear plate and is rotatably connected to a top block, and the second stud is threadedly connected to the corresponding ear plate.

[0011] Preferably, teeth are provided on a surface of the top block close to the toothed disc, and the teeth on the top block can mesh with the toothed disc.

[0012] Preferably, the bridge crack detection device also includes a connecting shaft, a mounting tube, a separating ring, two end covers and two second springs. The connecting shaft is rotatably arranged at an end of the fixed shaft away from the first block, and the rotation axis of the connecting shaft coincides with the axis of the fixed shaft. The mounting tube is fixedly installed on the connecting shaft, the axis of the mounting tube is perpendicular to the axis of the connecting shaft, and the extension line of the axis of the connecting shaft passes through the middle of the mounting tube. The separating ring is fixedly installed in the mounting tube, and the separating ring is located in the middle of the mounting tube. The two end covers are slidably arranged at both ends of the mounting tube along the axial direction of the mounting tube. The two second springs are both arranged in the mounting tube, each second spring is located between the separating ring and an end cover, and the two ends of the second spring are respectively connected to the separating ring and the corresponding end cover. The displacement meter is slidably arranged in the mounting tube along the axial direction of the mounting tube, and the two ends of the displacement meter are respectively abutted against the two end covers.

[0013] Preferably, two first springs are provided, the two first springs can be extended and retracted along the first direction, and one first spring is located on a side of the first tooth plate away from the second tooth plate, and the other first spring is located on a side of the second tooth plate away from the first tooth plate.

[0014] Preferably, a positioning plate is sleeved on the fixed shaft, the positioning plate is fixedly connected to the fixed shaft, the positioning plate is rotatably connected to a side of the oriented plate close to the first block, a third stud is threadedly connected to the oriented plate, the third stud passes through the oriented plate along the axial direction of the fixed shaft, and the third stud can abut against the oriented plate.

[0015] Preferably, the bridge crack detection device also includes a support plate and a movable plate, the support plate is fixedly mounted on the bridge, the movable plate is arranged on the support plate, and the movable plate is located below the telescopic mechanism, a third spring is arranged between the movable plate and the support plate, the two ends of the third spring are respectively connected to the movable plate and the support plate, and the third spring is telescopic in the vertical direction, and the movable plate can abut against the telescopic mechanism to support the telescopic mechanism.

[0016] The beneficial effects of the present invention are as follows: through the coordinated setting of the telescopic mechanism and the crack, compared with the existing installation method of drilling holes on both sides of the crack for the displacement meter, the bridge crack detection device can shorten the distance between the two installation points, so that the two installation points are in the crack to be detected, avoiding the occurrence of new cracks between the installation points and the crack to be detected, which leads to errors in the detection results; when the telescopic direction of the telescopic mechanism in the crack is not perpendicular to the width displacement direction of the crack, through the coordination between the directional plate, the linkage assembly and the steering assembly, the directional plate can rotate around the fixed axis, so that the moving direction of the linkage assembly is consistent with the crack width displacement direction, when the two clamping blocks slide in the radial direction along the fixed axis, the sliding direction of the clamping blocks can be perpendicular to the crack width direction, so that the displacement direction of the displacement meter is consistent with the crack width displacement direction, even if the telescopic direction of the telescopic mechanism is not consistent with the crack width displacement direction, the movement amount of the telescopic mechanism in the crack width displacement direction can be transmitted to the linkage assembly through the steering assembly, and the displacement meter can accurately obtain detection data according to the displacement distance of the crack width, thereby improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a bridge crack detection device provided by an embodiment of the present invention;

[0018] Figure 2 A front view of a bridge crack detection device provided by an embodiment of the present invention;

[0019] Figure 3 for Figure 2 Sectional view along AA direction;

[0020] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0021] Figure 5 A left view of a bridge crack detection device provided by an embodiment of the present invention;

[0022] Figure 6 for Figure 5 Sectional view along CC direction;

[0023] Figure 7 A schematic structural diagram of a second card block of a bridge crack detection device provided by an embodiment of the present invention;

[0024] Figure 8 A schematic structural diagram of a first card block of a bridge crack detection device provided by an embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of the installation position of a support plate of a bridge crack detection device provided in an embodiment of the present invention.

[0026] Among them: 100, fixed shaft; 101, directional plate; 102, first clamping block; 103, second clamping block; 104, gear; 105, first tooth plate; 106, second tooth plate; 107, clamping plate; 108, limit groove; 109, first spring; 110, slider; 111, slide column; 112, second groove; 113, first slide groove; 114, first stud; 115, first groove; 116, toothed disc; 117, Through slot; 201, top block; 202, ear plate; 203, second stud; 204, third groove; 205, positioning plate; 206, third stud; 207, clamping block; 208, connecting shaft; 209, mounting tube; 210, separation ring; 211, end cover; 212, second spring; 301, displacement meter; 302, support plate; 303, movable plate; 304, third spring; 305, telescopic mechanism; 306, bridge. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] like Figures 1 to 9 As shown, an embodiment of the present invention provides a bridge crack detection device, including a fixed shaft 100, a telescopic mechanism 305, an oriented plate 101, an adjustment mechanism and a displacement meter 301, wherein the fixed shaft 100 is arranged in the middle of the crack, and the fixed shaft 100 is perpendicular to the plane where the crack width direction is located, the telescopic mechanism 305 is arranged on the fixed shaft 100, and the fixed shaft 100 is located in the middle of the telescopic mechanism 305, the telescopic mechanism 305 extends along the radial direction of the fixed shaft 100, and the telescopic mechanism 305 can be inserted into the crack and abut against two side surfaces in the crack width direction; the oriented plate 101 is rotatably arranged on the fixed shaft 100 around the axis of the fixed shaft 100, and the oriented plate 101 can be stationary relative to the fixed shaft 100; the adjustment mechanism is provided with two, The two adjustment mechanisms are symmetrically arranged about the fixed axis 100, and each adjustment mechanism includes a linkage component, a steering component and a clamping block 207. The linkage component is slidably arranged on the directional plate 101 along the radial direction of the fixed axis 100, and the two linkage components are located on both sides of the fixed axis 100. The steering component is arranged on the telescopic mechanism 305. The steering component is used to connect the linkage component and the telescopic mechanism 305, and transmit the telescopic amount of the telescopic mechanism 305 along the crack width direction to the linkage component. The clamping block 207 is slidably arranged on the linkage component along the radial direction of the fixed axis 100, and the clamping block 207 can be stationary relative to the linkage component; the displacement meter 301 is located between the two clamping blocks 207, and the two ends of the displacement meter 301 are respectively connected to the two clamping blocks 207.

[0031] By coordinating the telescopic mechanism 305 with the crack, compared with the existing installation method of drilling holes on both sides of the crack for the displacement meter 301, the bridge crack detection device can shorten the distance between the two installation points, so that the two installation points are in the crack to be detected, avoiding the occurrence of new cracks between the installation points and the crack to be detected, which may cause errors in the detection results; when the telescopic direction of the telescopic mechanism 305 in the crack is not perpendicular to the width displacement direction of the crack, through the cooperation between the directional plate 101, the linkage assembly, and the steering assembly, the directional plate 101 can rotate around the fixed axis 100, so that the linkage assembly The moving direction is consistent with the displacement direction of the crack width. When the two clamping blocks 207 slide in the radial direction of the fixed axis 100, the sliding direction of the clamping blocks 207 can be perpendicular to the crack width direction, so that the displacement direction of the displacement meter 301 is consistent with the displacement direction of the crack width. Even if the telescopic direction of the telescopic mechanism 305 is not consistent with the displacement direction of the crack width, the movement amount of the telescopic mechanism 305 in the displacement direction of the crack width can be transmitted to the linkage assembly through the steering assembly. The displacement meter 301 can accurately obtain detection data based on the displacement distance of the crack width, thereby improving the accuracy of the detection results.

[0032] In this embodiment, the telescopic mechanism 305 includes a first clamping block 102, a second clamping block 103, a gear 104, a first tooth plate 105, a second tooth plate 106 and two clamping plates 107. The first clamping block 102 and the second clamping block 103 are relatively slidably connected along a first direction. One end of the fixed shaft 100 is slidably arranged on the first clamping block 102 along the first direction. The end of the fixed shaft 100 connected to the first clamping block 102 is rectangular. A limiting groove 108 is provided on the first clamping block 102. The rectangular end of the fixed shaft 100 is slidably arranged in the limiting groove 108. The limiting groove 108 can limit the rotation of the fixed shaft 100 around its own axis. The first direction is perpendicular to the fixed shaft 100. The two adjustment mechanisms are arranged along the first direction. The gear 104 is sleeved on the fixed shaft 100, and the gear 104 is rotatably connected to the fixed shaft 100. The first tooth plate 105 is fixedly installed on the first clamping block 102, and the second tooth plate 106 is fixedly installed on the second On the block 103, the length directions of the first tooth plate 105 and the second tooth plate 106 extend along the first direction, the first tooth plate 105 and the second tooth plate 106 are located on both sides of the gear 104, and the first tooth plate 105 and the second tooth plate 106 are both meshed with the gear 104, and when the gear 104 rotates, it can drive the first tooth plate 105 and the second tooth plate 106 to move synchronously in opposite directions, a first spring 109 is provided between the first block 102 and the second block 103, and the two ends of the first spring 109 are respectively connected to the first block 102 and the second block 103, two clamping plates 107 are respectively installed on the first block 102 and the second block 103, and the two clamping plates 107 and the fixed shaft 100 are located on both sides of the first block 102 in the axial direction of the fixed shaft 100, the first spring 109 provides power for the relative sliding of the first slider 110 and the second slider 110, and also enables the two clamping plates 107 to always abut against the crack.

[0033] The fixed shaft 100 is located in the middle of the first clamping block 102 and the second clamping block 103. When the first clamping block 102 and the second clamping block 103 are both subjected to a thrust toward the fixed shaft 100, the gear 104 on the fixed shaft 100 rotates under the action of the first tooth plate 105 and the second tooth plate 106, and the relative position relationship between the fixed shaft 100 and the first clamping block 102 and the second clamping block 103 remains unchanged; when the clamping plate 107 is inserted into the crack, the fixed shaft 100 is located outside the crack. After the thrust of the first clamping block 102 and the second clamping block 103 is removed, the first clamping block 102 and the second clamping block 103 will be subjected to the elastic force of the first spring 109, causing the two clamping plates 107 to move away from each other, so that the clamping plates 107 abut against the crack, and the entire device can be fixed.

[0034] In this embodiment, each linkage assembly includes a slider 110 and a slide post 111, a spacing is provided between the directional plate 101 and the first block 102, a second groove 112 is provided on a side of the directional plate 101 away from the first block 102, the slider 110 is slidably arranged in the second groove 112 along the radial extension direction of the fixed shaft 100, a first slide groove 113 is provided on a side of the slider 110 away from the directional plate 101, a clamping block 207 is slidably arranged in the first slide groove 113 along the direction in which the slider 110 slides in the second groove 112, a first stud 114 is provided on the slider 110, and the first stud 114 and the slider 1 10 is threadedly connected, and the first stud 114 can abut against the clamping block 207. By rotating the first stud 114, the first stud 114 can spirally move on the slider 110, and the moving direction of the first stud 114 is perpendicular to the direction in which the clamping block 207 slides on the slider 110. The first stud 114 can abut against the clamping block 207 and limit the clamping block 207 from sliding on the slider 110. One end of the slide column 111 is fixedly installed on a surface of the slider 110 close to the first clamping block 102, and the slide column 111 passes through the directional plate 101 and is slidably connected to the directional plate 101. The other end of the slide column 111 is connected to the steering assembly.

[0035] In this embodiment, one of the steering components is arranged on the first card block 102, and the other steering component is arranged on the second card block 103. The first card block 102 and the second card block 103 are both provided with a first groove 115 on one side close to the directional plate 101; each steering component includes a gear plate 116 and a locking portion, the gear plate 116 is rotatably arranged in the first groove 115 of the first card block 102 or the second card block 103, the rotation axis of the gear plate 116 is parallel to the rotation axis of the fixed shaft 100, the locking portion is arranged on the first card block 102 or the second card block 103 on which the gear plate 116 is installed, and is used to control whether the gear plate 116 rotates in the first groove 115, and a through groove 117 is arranged on the gear plate 116, and the through groove 117 passes through the center of the gear plate 116 and extends in the radial direction of the gear plate 116, and the end of the sliding column 111 away from the slider 110 is slidably arranged in the through groove 117, and the sliding column 111 is arranged in the first card block 1 02 and the card plate 107 on the second card block 103 are inserted into the crack, the relative sliding direction of the first card block 102 and the second card block 103 is determined. When the relative sliding direction of the first card block 102 and the second card block 103 is inconsistent with the width displacement direction of the crack, it is necessary to adjust the sliding direction of the slider 110 on the directional plate 101 on the directional plate 101, rotate the directional plate 101, and the sliding column 111 will drive the slider 110 to move in the second groove 112 under the action of the toothed plate 116, so that the sliding direction of the slider 110 is consistent with the width displacement direction of the crack. At this time, the toothed plate 116 is locked by the locking part, so that the toothed plate 116 cannot rotate in the first groove 115; after the crack is displaced in the width direction, the first card block 102 and the second card block 103 will slide relative to each other, and the two clamping blocks 207 can drive the displacement meter 301 to displace along the width direction of the crack.

[0036] In this embodiment, each locking portion includes a top block 201, an ear plate 202 and a second stud 203. A third groove 204 is provided on the surface of the first block 102 and the second block 103. The third groove 204 on the first block 102 is connected to the first groove 115, and the third groove 204 on the second block 103 is connected to the first groove 115. One top block 201 is slidably arranged in one third groove 204, and the top block 201 can abut against the circumference of the toothed disk 116 in the corresponding first groove 115; the two ear plates 202 in the two locking portions are fixedly arranged respectively. It is installed on the side where the third groove 204 is opened on the first block 102 and the second block 103, and each second stud 203 passes through the ear plate 202 and is rotatably connected to a top block 201. The second stud 203 is threadedly connected to the corresponding ear plate 202. When the sliding direction of the slider 110 on the directional plate 101 is consistent with the width displacement direction of the crack, there is no need to rotate the directional plate 101. At this time, the second stud 203 is rotated so that the second stud 203 pushes the top block 201 to approach the toothed disc 116, thereby increasing the friction between the top block 201 and the toothed disc 116 and limiting the rotation of the toothed disc 116.

[0037] In this embodiment, teeth are provided on one surface of the top block 201 close to the toothed disk 116 , and the teeth on the top block 201 can engage with the toothed disk 116 . After the top block 201 abuts against the toothed disk 116 , the top block 201 engages with the toothed disk 116 , further increasing the friction between the top block 201 and the toothed disk 116 .

[0038] In this embodiment, the bridge crack detection device also includes a connecting shaft 208, a mounting cylinder 209, a separating ring 210, two end covers 211 and two second springs 212. The connecting shaft 208 is rotatably arranged at one end of the fixed shaft 100 away from the first block 102, and the rotation axis of the connecting shaft 208 coincides with the axis of the fixed shaft 100. The mounting cylinder 209 is fixedly installed on the connecting shaft 208, the axis of the mounting cylinder 209 is perpendicular to the axis of the connecting shaft 208, and the extended line of the axis of the connecting shaft 208 passes through the middle of the mounting cylinder 209. The separating ring 210 is fixedly installed in the mounting cylinder 209, and the separating ring 210 is located in the middle of the mounting cylinder 209. The two end covers 211 are arranged along the mounting cylinder 209. 09 is slidably arranged at both ends of the mounting tube 209 in the axial direction, and two second springs 212 are both arranged in the mounting tube 209, each second spring 212 is located between the separation ring 210 and an end cover 211, and the two ends of the second spring 212 are respectively connected to the separation ring 210 and the corresponding end cover 211, and the displacement meter 301 is slidably arranged in the mounting tube 209 along the axial direction of the mounting tube 209, and the two ends of the displacement meter 301 are respectively abutted against the two end covers 211, under the action of the two second springs 212, the displacement meter 301 is always located in the middle of the mounting tube 209, and the lengths of the displacement meter 301 on both sides of the crack are equal, which further improves the accuracy of the displacement measured by the displacement meter 301.

[0039] In this embodiment, two first springs 109 are provided, and the two first springs 109 can be extended and retracted along the first direction, and one first spring 109 is located on the side of the first tooth plate 105 away from the second tooth plate 106, and the other first spring 109 is located on the side of the second tooth plate 106 away from the first tooth plate 105. The two first springs 109 are symmetrically arranged, and the force provided to the first card block 102 and the second card block 103 is more evenly distributed, so that the relative sliding of the first card block 102 and the second card block 103 is smoother.

[0040] In this embodiment, a positioning disk 205 is sleeved on the fixed shaft 100, and the positioning disk 205 is fixedly connected to the fixed shaft 100. The positioning disk 205 is rotatably connected to a side of the oriented plate 101 close to the first block 102. A third stud 206 is threadedly connected to the oriented plate 101, and the third stud 206 penetrates the oriented plate 101 along the axial direction of the fixed shaft 100. The third stud 206 can abut against the oriented plate 101. When the oriented plate 101 is rotated, when the sliding direction of the slider 110 on the oriented plate 101 is consistent with the width displacement direction of the crack, the oriented plate 101 does not need to be rotated again. At this time, by rotating the third stud 206, the third stud 206 is abutted against the positioning disk 205, thereby increasing the friction between the oriented plate 101 and the positioning disk 205.

[0041] In this embodiment, the bridge crack detection device also includes a support plate 302 and a movable plate 303. The support plate 302 is fixedly installed on the bridge 306. The movable plate 303 is arranged on the support plate 302, and the movable plate 303 is located below the telescopic mechanism 305. A third spring 304 is arranged between the movable plate 303 and the support plate 302. The two ends of the third spring 304 are respectively connected to the movable plate 303 and the support plate 302, and the third spring 304 is telescopic in the vertical direction. The movable plate 303 can abut against the telescopic mechanism 305 to support the telescopic mechanism 305. When the crack is on the side of the bridge 306, the support plate 302 is installed below the telescopic mechanism 305, and the movable plate 303 provides an upward supporting force to the first block 102 and the second block 103 to prevent the telescopic mechanism 305 from being deflected due to gravity.

[0042] The working principle and working method of a bridge crack detection device provided in this embodiment are as follows:

[0043] The first and second clamping blocks 102 and 103 are moved away from each other by the first spring 109, and the first and second clamping blocks 102 and 103 are moved away from each other by the first spring 109. The first block 102 and the second block 103 no longer move relative to each other, and then the directional plate 101 is rotated so that the sliding direction of the slider 110 on the directional plate 101 is consistent with the width displacement direction of the crack. In the process of rotating the directional plate 101, the directional plate 101 drives the slide post 111 to slide in the through groove 117 through the slide post 110, and the slide post 110 slides in the second groove 112. The toothed disc 116 rotates in the first groove 115 under the action of the slide post 111. When the slide post 111 is moved in the directional plate 101, the slide post 111 is rotated in the first groove 115. When the sliding direction on the ear plate is consistent with the width displacement direction of the crack, stop rotating the directional plate 101, and then rotate the third stud 206 to make the third stud 206 abut against the positioning plate 205 to limit the rotation of the directional plate 101; then rotate the second stud 203, the second stud 203 spirally moves forward on the ear plate 202 and pushes the top block 201 to slide in the third groove 204, and the top block 201 slides toward the toothed disc 116 until it abuts against the toothed disc 116, and the toothed disc 116 will no longer rotate at this time.

[0044] Then, the connecting shaft 208 is rotated, and the connecting shaft 208 drives the installation cylinder 209 to rotate, so that the axial direction of the installation cylinder 209 is consistent with the width displacement direction of the crack as much as possible, and then the clamping block 207 is pushed to slide on the slider 110, so that the two clamping blocks 207 are respectively in contact with the two end covers 211, and then the two first studs 114 are respectively rotated, so that the first studs 114 lock the clamping blocks 207 at the current position of the slider 110. At this time, the installation cylinder 209 will not rotate anymore, and the bridge crack detection device is installed. When the crack is displaced in its width direction, the two clamping plates 107 are in the first spring Under the action of 109, the corresponding first card block 102 and the second card block 103 are pulled to move respectively, and the first card block 102 and the second card block 103 are close to each other, and the two card plates 107 are away from each other to adapt to the displacement change of the crack; the first card block 102 and the second card block 103 close to each other respectively drive their corresponding sliders 110 to slide in the second groove 112 through the corresponding sliding column 111, and the two sliders 110 are close to each other, and the two sliders 110 drive the corresponding clamping block 207 to squeeze the end cover 211, and the two end covers 211 squeeze the displacement meter 301 to cause displacement change, and the displacement meter 301 detects data.

[0045] When the bridge crack detection device is installed on the side of the bridge 306, the support plate 302 is installed below the bridge crack detection device so that the movable plate 303 can abut against the first block 102 and the second block 103 and support them.

[0046] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A bridge crack detection device, characterized in that: include: A fixed shaft, a telescopic mechanism, an oriented plate, an adjustment mechanism and a displacement meter, wherein the fixed shaft is arranged in the middle of the crack and is perpendicular to the plane where the crack is located, the telescopic mechanism is arranged on the fixed shaft and is located in the middle of the telescopic mechanism, the telescopic mechanism extends in the radial direction of the fixed shaft and can be inserted into the crack and abut against two side surfaces in the crack width direction; the oriented plate is arranged on the fixed shaft and rotates around the axis of the fixed shaft, and the oriented plate can be stationary relative to the fixed shaft; there are two adjustment mechanisms, and the two adjustment mechanisms are symmetrically arranged about the fixed shaft, each adjustment mechanism includes a linkage component, a steering component and a clamping block, the linkage component is slidably arranged on the oriented plate along the radial direction of the fixed shaft, and the two linkage components are located on both sides of the fixed shaft, the steering component is arranged on the telescopic mechanism, the steering component is used to connect the linkage component and the telescopic mechanism, and transmit the telescopic amount of the telescopic mechanism in the crack width direction to the linkage component, the clamping block is slidably arranged on the linkage component along the radial direction of the fixed shaft, and the clamping block can be stationary relative to the linkage component; the displacement meter is located between the two clamping blocks, and the two ends of the displacement meter are respectively connected to the two clamping blocks; The telescopic mechanism includes a first clamping block, a second clamping block, a gear, a first tooth plate, a second tooth plate and two clamping plates, the first clamping block and the second clamping block are relatively slidably connected along a first direction, one end of the fixed shaft is slidably arranged on the first clamping block along the first direction, the first direction is perpendicular to the fixed shaft, the two adjustment mechanisms are arranged along the first direction, the gear is sleeved on the fixed shaft, and the gear is rotatably connected to the fixed shaft, the first tooth plate is fixedly mounted on the first clamping block, the second tooth plate is fixedly mounted on the second clamping block, the first tooth plate and the second tooth plate are located on both sides of the gear, and the first tooth plate and the second tooth plate are both meshed with the gear, a first spring is provided between the first clamping block and the second clamping block, the two ends of the first spring are respectively connected to the first clamping block and the second clamping block, the two clamping plates are respectively mounted on the first clamping block and the second clamping block, and the two clamping plates and the fixed shaft are located on both sides of the first clamping block in the axial direction of the fixed shaft.

2. A bridge crack detection device according to claim 1, characterized in that: Each linkage assembly includes a slider and a slide column. A spacing is provided between the directional plate and the first block. A second groove is provided on a side of the directional plate away from the first block. The slider is slidably arranged in the second groove along the radial extension direction of the fixed shaft. A first slide groove is provided on a side of the slider away from the directional plate. A clamping block is slidably arranged in the first slide groove along the direction in which the slider slides in the second groove. A first stud is provided on the slider. The first stud is threadedly connected to the slider, and the first stud can abut against the clamping block. One end of the slide column is fixedly installed on a side of the slider close to the first block, and the slide column passes through the directional plate and is slidably connected to the directional plate. The other end of the slide column is connected to the steering assembly.

3. A bridge crack detection device according to claim 2, characterized in that: One of the steering assemblies is arranged on the first clamping block, and the other steering assembly is arranged on the second clamping block. The first clamping block and the second clamping block are both provided with a first groove on one side close to the directional plate; each steering assembly includes a gear disc and a locking part, the gear disc is rotatably arranged in the first groove of the first clamping block or the second clamping block, the rotation axis of the gear disc is parallel to the rotation axis of the fixed shaft, the locking part is arranged on the first clamping block or the second clamping block on which the gear disc is installed, and is used to control whether the gear disc rotates in the first groove or not, the gear disc is provided with a through groove, the through groove passes through the center of the gear disc and extends along the radial direction of the gear disc, and the end of the sliding column away from the sliding block is slidably arranged in the through groove.

4. A bridge crack detection device according to claim 3, characterized in that: Each locking part includes a top block, an ear plate and a second stud. A third groove is provided on the surface of the first clamping block and the second clamping block. The third groove on the first clamping block is connected to the first groove, and the third groove on the second clamping block is connected to the first groove. A top block is slidably arranged in a third groove, and the top block can abut against the circumferential surface of the toothed disk in the corresponding first groove; the two ear plates in the two locking parts are respectively fixedly installed on the surface of the first clamping block and the second clamping block on which the third groove is provided, each second stud passes through the ear plate and is rotatably connected to a top block, and the second stud is threadedly connected to the corresponding ear plate.

5. A bridge crack detection device according to claim 4, characterized in that: A surface of the top block close to the toothed disc is provided with teeth, and the teeth on the top block can mesh with the toothed disc.

6. A bridge crack detection device according to claim 1, characterized in that , also includes a connecting shaft, a mounting cylinder, a separating ring, two end covers and two second springs. The connecting shaft is rotatably arranged at one end of the fixed shaft away from the first block, and the rotation axis of the connecting shaft coincides with the axis of the fixed shaft. The mounting cylinder is fixedly installed on the connecting shaft, the axis of the mounting cylinder is perpendicular to the axis of the connecting shaft, and the extension line of the axis of the connecting shaft passes through the middle of the mounting cylinder. The separating ring is fixedly installed in the mounting cylinder, and the separating ring is located in the middle of the mounting cylinder. The two end covers are slidably arranged at the two ends of the mounting cylinder along the axial direction of the mounting cylinder. The two second springs are both arranged in the mounting cylinder, each second spring is located between the separating ring and an end cover, and the two ends of the second spring are respectively connected to the separating ring and the corresponding end cover. The displacement meter is slidably arranged in the mounting cylinder along the axial direction of the mounting cylinder, and the two ends of the displacement meter are respectively abutted against the two end covers.

7. A bridge crack detection device according to claim 1, characterized in that: Two first springs are provided, and the two first springs can be extended and retracted along the first direction, and one first spring is located on a side of the first tooth plate away from the second tooth plate, and the other first spring is located on a side of the second tooth plate away from the first tooth plate.

8. A bridge crack detection device according to claim 1, characterized in that: A positioning plate is sleeved on the fixed shaft, the positioning plate is fixedly connected to the fixed shaft, the positioning plate is rotatably connected to a side of the directional plate close to the first clamping block, a third stud is threadedly connected to the directional plate, the third stud penetrates the directional plate along the axial direction of the fixed shaft, and the third stud can abut against the directional plate.

9. The bridge crack detection device according to claim 1, characterized in that: It also includes a support plate and a movable plate. The support plate is fixedly installed on the bridge. The movable plate is arranged on the support plate, and the movable plate is located below the telescopic mechanism. A third spring is arranged between the movable plate and the support plate. The two ends of the third spring are respectively connected to the movable plate and the support plate, and the third spring is telescopic in the vertical direction. The movable plate can abut against the telescopic mechanism to support the telescopic mechanism.

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