CN116145545A - Bridge bottom surface crack detection device - Google Patents
Bridge bottom surface crack detection device Download PDFInfo
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- CN116145545A CN116145545A CN202310421779.3A CN202310421779A CN116145545A CN 116145545 A CN116145545 A CN 116145545A CN 202310421779 A CN202310421779 A CN 202310421779A CN 116145545 A CN116145545 A CN 116145545A
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- 238000001514 detection method Methods 0.000 title claims abstract description 99
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000003384 imaging method Methods 0.000 description 7
- 230000000246 remedial effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 210000001503 joint Anatomy 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
- F16M11/425—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels along guiding means
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge bottom surface crack detection device which comprises a vehicle body, a support structure, a slideway arm and a sliding detection device, wherein the support structure comprises a lifting column, a telescopic arm and a lifting arm, the lower end of the lifting column is vertically and rotatably connected with the vehicle body, the fixed end of the telescopic arm is fixedly connected with the upper end of the lifting column, the upper end of the lifting arm is fixedly connected with the free end of the telescopic arm, the connecting end of the slideway arm is horizontally and rotatably connected with the lower end of the lifting arm, the slideway arm is provided with a telescopic slideway, the sliding detection device is slidably connected onto the slideway arm through the telescopic slideway, the sliding detection device comprises a sliding camera device which can slide along the length direction which is horizontally perpendicular to the telescopic slideway and is internally provided with an independent power supply, and a sliding device which can charge and supply power, and the sliding device is horizontally and rotatably connected with a slideway arm. The device solves the problems of complex structure and high manufacturing cost of the bridge bottom surface crack detection device in the prior art.
Description
Technical Field
The invention relates to the field of engineering detection equipment, in particular to a bridge bottom surface crack detection device.
Background
Cracks are the most common defects or damage phenomena in concrete bridges, and besides structural problems, non-structural cracks in various conditions are also main causes of small cracks in concrete, such as drying shrinkage, temperature stress, external load, foundation deformation and the like. However, the damage to the structure is greatly different due to the cause, state, development, position in the structure and the like of the cracks, and serious cracks can damage the integrity and stability of the structure and greatly affect the safe operation of the structure, especially the cracks on the bottom surface of a concrete bridge beam slab, and even can cause serious accidents of bridge collapse. Therefore, in order to determine whether a crack exists in the bridge floor, grasp the depth and the length and the width of the crack, reasonably evaluate the influence of the crack on the structure, and select a proper repairing scheme and timing, it is very important to detect the crack of the bridge floor.
At present, the detection method for the bottom surface cracks of the bridge is mainly manual detection, namely, detection personnel hold detection equipment, stand on a hanging basket bridge detection vehicle arranged under the bridge, stand on a scaffold erected under the bridge or hang on a bridge side, and the like to detect the bottom surface cracks of the bridge. Therefore, the detection method has the advantages of low universality, high cost, high labor intensity and low safety.
In order to solve the above technical problems, in the prior art, for example, a bridge bottom surface detection structure and a detection method thereof proposed by chinese patent application No. 201911318988.5, according to the thickness of a bridge and the distance between a carrier vehicle and the edge of the bridge, a supporting device is used to drive an auxiliary device to move in the X direction and the Z direction, so that the auxiliary device extends into the bottom of the bridge; then, the auxiliary device rotates around the Z direction and extends along the X direction, so that the main frame rotates by 90 degrees, the auxiliary frame extends out of the main frame, and the first sliding rail, the second sliding rail and the third sliding rail are positioned on the same straight line to provide a detection channel for the stretching device; finally, the stretching device drives the translation plate to move along the detection channel, and the detection device completes the detection work of the bottom surface of the bridge. According to the technical scheme, the problem of high risk of the existing manual detection method is solved, but the internal structures of the supporting device, the auxiliary device and the stretching device of the detection structure are complex, and the manufacturing cost is high.
Disclosure of Invention
Technical problem to be solved
The invention provides a bridge bottom surface crack detection device, which solves the problems of complex structure and high manufacturing cost of the bridge bottom surface crack detection device in the prior art.
Technical proposal
In order to achieve the above purpose, the invention provides a bridge bottom surface crack detection device, which comprises a vehicle body and a support structure, wherein a control room is arranged on the vehicle body, the support structure comprises a lifting column, a telescopic arm and a lifting arm, the lower end of the lifting column is vertically and rotatably connected with the vehicle body, the fixed end of the telescopic arm is fixedly connected with the upper end of the lifting column, the upper end of the lifting arm is fixedly connected with the free end of the telescopic arm, the bridge bottom surface crack detection device is characterized by further comprising a slideway arm and a sliding detection device, the connecting end of the slideway arm is horizontally and rotatably connected with the lower end of the lifting arm, a telescopic slideway is arranged on the slideway arm along the length direction of the slideway arm, the sliding detection device is slidably connected with the slideway arm through the telescopic slideway, the sliding detection device comprises a sliding camera device which can slide along the length direction which is horizontally perpendicular to the telescopic slideway and is internally provided with an independent power supply, the sliding device is horizontally and slidably connected with the sliding device along the width direction of the slideway arm, the sliding device is horizontally and rotatably connected with the sliding device, when the sliding device is in a sliding direction of the slideway is required to be overlapped with the sliding axis, and the sliding device is enabled to slide along the length direction of the sliding device to slide along the sliding direction, and the sliding direction of the sliding device is increased; when the sliding camera device is in a non-working state, a power input end in the sliding camera device is contacted with a power supply output end in the sliding device and is charged.
Preferably, the sliding device comprises a sliding table, a first sliding block, a storage battery and a charging seat, wherein the first sliding block is provided with two sliding blocks and is fixedly arranged on the lower surface of the sliding table, the sliding table is connected to the telescopic slideway in a sliding way along the length direction of the truss through the first sliding blocks, the cross section of the sliding table, which is close to the lifting arm part, is of a convex shape and is of a uniform thin-wall structure, the charging seat is fixedly arranged on the upper surface of the sliding table, which is close to the lifting arm part, one side surface of the charging seat, which is close to the lifting arm, is provided with an output core, the sliding table, which is far away from the lifting arm part, is provided with a mounting groove, the storage battery is detachably and fixedly arranged in the mounting groove, the charging seat is electrically connected with the storage battery, when the sliding camera device is in a non-working state, a power input end in the sliding camera device is contacted with the output core on the side surface of the charging seat for charging, the sliding rail arms are arranged on two supporting tables arranged on two sides of the sliding table along the width direction of the truss, the sliding table is respectively provided with sliding rail arms on the supporting tables on two sides of the sliding table along the width direction of the truss, a second motor is arranged in the sliding table and is electrically connected with the storage battery, a second driving gear is coaxially and fixedly arranged at the output end of the second motor, a second connecting shaft is horizontally and vertically connected with the upper part of the inner wall of the sliding table in a rotating manner in the axial direction of the sliding table, a second driven gear is coaxially and fixedly arranged on the shaft body of the second connecting shaft, the second driving gear is meshed with the second driven gear, bevel gears II are coaxially and fixedly arranged at the two ends of the second connecting shaft respectively, a first bevel gear is horizontally and fixedly connected with the supporting tables on two sides of the sliding table along the width direction of the truss respectively, the bevel gear I and the bevel gear II are meshed, a rotating shaft connected with the bevel gear I vertically penetrates through the top surface of the supporting table, the connecting end of the sliding rail arm is fixedly connected with the top end of the rotating shaft and located on the upper surface of the supporting table, the upper surface of the sliding rail arm and the top surface of the sliding table are located on the same horizontal plane, the sliding rail I is arranged on the top surface of the sliding table, the sliding camera device is connected with the sliding table in a sliding mode along the width direction of the truss through the sliding rail I, the sliding rail II is arranged on the upper surface of the sliding rail arm, and the structure and the size of the sliding rail I and the structure and the size of the sliding rail II are the same.
Preferably, a sliding groove matched with the shape and the size of the cross section of the upper edge of the telescopic slide is formed in the bottom of the first sliding block, a cavity is formed in the first sliding block, a third motor is fixedly installed in the first sliding block, the third motor is electrically connected with the storage battery, a third driving gear is coaxially and fixedly installed at the output end of the third motor, a third connecting shaft is rotationally connected to the inner wall of the first sliding block along the direction perpendicular to the sliding direction of the third driving gear, a third driven gear is coaxially and fixedly installed on the third connecting shaft, the third driven gear is meshed with the third driving gear, a first rail wheel is coaxially and fixedly installed on the two sides of the third driven gear in the axial direction of the third driven gear, the first rail wheel abuts against the upper edge of the telescopic slide, and the width of the first rail wheel is larger than or equal to the width of the upper edge of the telescopic slide.
Preferably, the sliding camera device comprises a camera and a second sliding block, the camera is mounted on the top surface of the second sliding block, the second sliding block is horizontally and slidably connected to the top surface of the sliding table along the width direction of the sliding rail arm through the first sliding rail, an illuminating lamp is arranged on the camera, and an input core is arranged on one side surface, opposite to the charging seat, of the second sliding block.
Preferably, the sliding groove matched with the cross section shape and the size of the top end of the sliding rail I is formed in the bottom of the sliding block II, a cavity is formed in the sliding block II, a motor IV is arranged in the sliding block II, a mounting seat of a power supply is fixedly arranged in the motor IV through the mounting seat, the power supply is arranged in the mounting seat and electrically connected with the input core, the motor IV is electrically connected with the power supply in the mounting seat, the power supply in the camera is electrically connected with the input core, when the sliding camera device is in a non-working state, the input core on the two sides of the sliding block is in contact with the output core on the side of the charging seat and charges the power supply in the camera, a driving gear IV is fixedly arranged at the output end of the motor IV in a coaxial mode, a connecting shaft IV is rotatably connected to the inner wall of the sliding block II along the direction perpendicular to the sliding direction of the motor IV, a driven gear IV is fixedly arranged on the connecting shaft IV, the driven gear IV is meshed with the driving gear IV, the driven gear IV is fixedly arranged on the two sides of the driving gear IV along the axial direction of the driving gear IV, the driven gear IV is fixedly arranged on the two sides of the driving gear IV, and the driving gear IV is fixedly arranged on the two sides of the driving gear IV.
Preferably, the slideway arm is a truss.
Preferably, the telescopic slide is parallel to each other and is provided with two telescopic slides and is in along the length direction fixed connection of truss the truss upper surface, the telescopic slide includes outer slide and interior slide, outer slide with the cross sectional shape of interior slide is the U type, interior slide is in along its length direction sliding connection in the outer slide, the lateral surface of interior slide is pasted tightly the medial surface of outer slide, two the free end fixedly connected with pin of interior slide, the both sides wall upper end of outer slide is equipped with the outside turn-ups of level, the both sides wall upper end of interior slide is equipped with the inward turn-ups of level, interior slide with outer slide upper edge parallel and level, the lateral wall cross section of telescopic slide forms the T type, two follow on the opposite face of outer slide the length direction of truss has been seted up the slide hole respectively, two between the outer slide and be close to the one end of lifting arm is equipped with the movable rod, the both ends of movable rod pass the slide hole respectively with two interior slide fixed connection, be equipped with draw gear in the interior, draw gear with the truss connection.
Preferably, one end of the two side walls of the inner slide close to the lifting arm is in a wedge shape, the sloping surfaces of the two side walls of the outer slide are opposite, and the free ends of the two side walls of the outer slide are in a wedge shape, and the sloping surfaces of the two side walls of the outer slide are outwards arranged.
Preferably, the traction device comprises a pulley block, a first driving gear, a first driven gear and a first motor, wherein the pulley block is arranged in the truss and is provided with two groups, each group of pulley block is provided with at least two pulleys, the two groups of pulley blocks are symmetrically arranged along the width of the truss, the two pulleys along the width direction of the truss are rotationally connected with the truss through a first connecting shaft, the pulleys in the pulley block are connected through a flexible belt, the flexible belt is fixedly connected with the movable rod, the driven gears are fixedly connected with one of the first connecting shafts, the driving gears are fixedly arranged at the output end of the first motor in a coaxial manner, and the output shaft of the first motor is connected with the first driven gear in a parallel arrangement with the first connecting shaft and is meshed with the first driven gear.
The invention has the following beneficial effects:
1. if the telescopic slideway stretches, the length of the telescopic slideway is smaller than the width of the bridge, a worker controls the motor IV to slide the sliding camera device to one of the sliding rail arms in the control room, and then the sliding rail arms are retracted, so that the sliding distance of the camera in the width direction of the bridge can be further increased by the sliding rail arms, and the detection range of the device is further increased by matching with the movement of the vehicle body.
2. A worker controls the first motor in the control chamber to extend the telescopic slideway, and the sliding length of the sliding detection device along the length direction of the truss is increased; the staff controls the motor II, and the two slide rail arms rotate 90 degrees clockwise and anticlockwise respectively, so that the axes of the slide rail I and the slide rail II are overlapped, and the sliding length of the sliding camera device along the truss width direction is increased; a worker controls the motor III to drive the sliding detection device to slide in the length direction of the truss by the first sliding block; finally, a worker controls the motor IV in the control room, so that the second slider drives the camera to slide on the first slide rail and the second slide rail, the camera feeds back an image of the crack at the bridge bottom to the control room in a signal form, and the worker analyzes the state of the crack through the image and takes corresponding remedial measures. The crack detection can be carried out in a rectangular range of the bottom surface of the bridge without frequent movement of the vehicle body, and the crack detection of the bottom surface of the bridge is not needed to be carried out manually, so that the manual detection cost is reduced, the safety of detection work is improved, and meanwhile, the detection device is simple in structure, low in manufacturing cost and convenient to operate.
3. The detection device has the advantages that the detection range of the bridge bottom surface is a rectangular range, the visual range of a camera can be increased, the bridge bottom surface is comprehensively detected, the missing detection area is reduced, meanwhile, the bridge bottom surface is not a plane, detection dead zones possibly occur, for example, the width direction of the bridge is spliced by a plurality of T beams, the bottom surface of the bridge is not a plane, the web plate of the T beam possibly blocks the sight under the wing plate of the T beam, at this time, a worker can control the motor II to unfold the slide rail arm and then control the slide block II, and the slide block II drives the slide camera device to slide on the slide rail arm, so that the camera can be moved to a position to be detected for detection, and the adaptability of the detection device is improved.
4. The storage battery can provide power for the motor II and the motor III, so that the sliding detection device is provided with an independent power source, the sliding detection device is not required to be electrically connected with a vehicle body, the sliding of the sliding detection device is prevented from being influenced by excessive connecting wires, meanwhile, the storage battery can be used for charging the power supply in the camera and the power supply in the motor IV in a contact manner, under the condition of guaranteeing the power of the sliding imaging device, the sliding imaging device can independently slide on the sliding rail arm, and the sliding imaging device is also prevented from being electrically connected with the vehicle body or the storage battery, and the sliding of the sliding imaging device is prevented from being influenced by excessive connecting wires.
5. The camera slides reciprocally along the length direction of the bridge through the second sliding block and slides reciprocally along the width direction of the bridge through the first sliding block in the sliding device, the first sliding block and the second sliding block do not need to directly provide power through the vehicle body, and the vehicle body does not need to frequently move along the length direction of the bridge along the supporting structure and the sliding detection device, so that the load of the vehicle body is reduced, and the purpose of saving energy is achieved.
6. The upper ends of the two side walls of the outer slide way are provided with the horizontal outward flanging, the upper ends of the two side walls of the inner slide way are provided with the horizontal inward flanging, the inner slide way is flush with the upper edge of the outer slide way, the cross section of the side wall of the telescopic slide way forms a T shape, thus the contact area between the top surface of the telescopic slide way and the bottom surface of the sliding detection device can be increased, the pressure of the sliding detection device to the telescopic slide way is dispersed, the bending strength of the telescopic slide way in the truss width direction is increased, the stability of the telescopic slide way is increased, and the effect of preventing the sliding detection device from being separated from the telescopic slide way can be also played.
7. The sliding groove matched with the shape and the size of the top end of the side wall of the telescopic slide way is formed in the bottom of the first sliding block, the width of the first rail wheel is larger than or equal to the width of the upper edge of the telescopic slide way, so that the sliding block can slide under the condition that the telescopic slide way is not stretched, after the telescopic slide way is stretched, the sliding block can slide on the outer slide way and also can slide on the inner slide way, and the sliding way cannot be separated from the slide way, so that the sliding block is matched with the slide ways with various cross-section shapes.
Drawings
FIG. 1 is a front view of a bridge floor crack detection device according to the present invention;
FIG. 2 is a schematic diagram showing the connection between a vehicle body and a bracket structure of a bridge bottom crack detection device according to the present invention;
FIG. 3 is a schematic diagram showing connection between a truss and a sliding camera device of the bridge bottom crack detection device according to the present invention;
fig. 4 is a schematic structural diagram of a sliding camera device of the bridge bottom crack detection device according to the present invention;
FIG. 5 is a schematic diagram of the internal structure of a sliding table of the bridge floor crack detection device according to the present invention;
fig. 6 is a schematic diagram of a charging seat of the bridge bottom crack detection device according to the present invention;
FIG. 7 is a schematic diagram of an internal structure of a slider of a bridge floor crack detection device according to the present invention;
FIG. 8 is a schematic view of the truss front orientation of a device for detecting cracks on the bottom surface of a bridge according to the present invention;
FIG. 9 is a schematic view of the rear orientation of a truss of a device for detecting cracks in the bottom surface of a bridge according to the present invention;
FIG. 10 is a schematic diagram of a connection between a first slider and a telescopic slide of a bridge bottom crack detection device according to the present invention;
FIG. 11 is a schematic diagram of a connection between a first slide and an external slide of a bridge bottom crack detection device according to the present invention;
FIG. 12 is a schematic diagram of a first slider and an inner slider of a bridge floor crack detection device according to the present invention;
FIG. 13 is a perspective view of a slider I and a telescoping slide of a bridge bottom crack detection device according to the present invention;
fig. 14 is an expanded schematic view of a sliding rail arm of the bridge bottom crack detection device according to the present invention.
In the figure 1, the vehicle body; 11. lifting columns; 12. a telescoping arm; 13. a lifting arm; 14. a control room; 2. truss; 21. a telescopic slideway; 211. an outer slide; 212. an inner slide; 213. a slide hole; 214. a stop lever; 22. a pulley; 23. a first connecting shaft; 24. a moving rod; 25. a flexible belt; 26. a first motor; 27. a first driving gear; 28. a driven gear I; 3. a sliding device; 31. a sliding table; 311. a support table; 312. a first stop block; 313. a first slide rail; 314. a second motor; 315. a driving gear II; 316. a driven gear II; 317. bevel gears I; 318. bevel gears II; 319. a second connecting shaft; 32. a slide rail arm; 321. a second stop block; 322. a second slide rail; 33. a first sliding block; 331. a third motor; 332. a driving gear III; 333. driven gear III; 334. a first rail wheel; 335. a third connecting shaft; 34. a storage battery; 35. a charging stand; 351. an output core; 4. a slide camera device; 41. a second slide block; 411. an input core; 42. a camera; 5. and (3) a bridge.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the invention by referring to the description.
The invention provides a bridge bottom surface crack detection device, as shown in fig. 1 and 2, the bridge bottom surface crack detection device comprises a vehicle body 1, a supporting structure, a slideway arm and a sliding detection device, wherein the vehicle body 1 is provided with a control chamber 14, the supporting structure comprises a lifting column 11, a telescopic arm 12 and a lifting arm 13, the lower end of the lifting column 11 is vertically and rotatably connected with the vehicle body 1, the fixed end of the telescopic arm 12 is fixedly connected with the upper end of the lifting column 11, the upper end of the lifting arm 13 is fixedly connected with the free end of the telescopic arm 12, the connecting end of the slideway arm is horizontally and rotatably connected with the lower end of the lifting arm 13, the slideway arm is provided with a telescopic slideway 21 along the length direction of the slideway arm, the sliding detection device is slidably connected onto the slideway arm through the telescopic slideway 21, the sliding detection device comprises a sliding camera device 4 capable of sliding along the length direction which is horizontally perpendicular to the telescopic slideway and internally provided with an independent power supply and a sliding device 3 capable of charging and supplying power, the sliding camera device 4 is horizontally and rotatably connected onto the sliding device 3 along the width direction of the slideway arm, when the sliding detection device is required to be enlarged, the length of the sliding detection device is enabled to be horizontally and vertically perpendicular to the length detection arm is enabled to be in the detection range, the length of the sliding device is enabled to be overlapped with the sliding rail 32, and the sliding rail 4 is enabled to slide; when the sliding image pickup device 4 is in a non-operating state, a power input end in the sliding image pickup device 4 is in contact with a power supply output end in the sliding device and is charged.
As shown in fig. 3 and 4, the sliding device 3 comprises a sliding table 31, a first sliding block 33, a storage battery 34 and a charging seat 35, the first sliding block 33 is provided with two sliding blocks and is fixedly arranged on the lower surface of the sliding table 31, the sliding table 31 is connected on the telescopic slide way 21 in a sliding way along the length direction of the slide way arm through the first sliding block 33, the cross section of the part of the sliding table 31 close to the lifting arm 13 is of a convex shape and is of a uniform thin-wall structure, the charging seat 35 is fixedly arranged on the upper surface of the part of the sliding table 31 close to the lifting arm 13, one side surface of the charging seat 35 close to the lifting arm is provided with an output core 351, the part of the sliding table 31 far from the lifting arm 13 is provided with a mounting groove, the storage battery 34 is detachably and fixedly arranged in the mounting groove, the charging seat 35 is electrically connected with the storage battery 34, and when the sliding camera device 4 is in a non-working state, a power input end in the sliding camera device 4 is contacted with the output core 351 on the side surface of the charging seat 35 for charging, the slide rail arms 32 are arranged on two support tables 311 which are arranged on two sides of the slide table 31 along the width direction of the slide rail arms, the slide rail arms 32 are respectively arranged on the support tables 311 on two sides of the slide table 31 along the width direction of the slide rail arms, as shown in fig. 5 and 6, a motor II 314 is arranged in the slide table 31, the motor II 314 is electrically connected with a storage battery 34, a driving gear II 315 is coaxially and fixedly arranged at the output end of the motor II 314, a connecting shaft II 319 is rotatably connected with the upper part of the inner wall of the slide table 31 in a way of being horizontally perpendicular to the axial direction of the slide table 31, a driven gear II 316 is coaxially and fixedly arranged on the shaft body of the connecting shaft II 319, the driving gear II 315 is meshed with the driven gear II 316, bevel gears II 318 are respectively and fixedly arranged at two ends of the connecting shaft II 319 in a way of being coaxially and horizontally and rotatably connected with a bevel gear I317 respectively in the support tables 311 on two sides of the slide table 31 along the width direction of the slide rail arm, the first bevel gear 317 is meshed with the second bevel gear 318, the rotating shaft connected with the first bevel gear 317 vertically passes through the top surface of the supporting table 311, the connecting end of the sliding rail arm 32 is fixedly connected with the top end of the rotating shaft and is positioned on the upper surface of the supporting table 311, the upper surface of the sliding rail arm 32 and the top surface of the sliding table 31 are positioned on the same horizontal plane, the sliding imaging device 4 is slidably connected with the sliding table 31 along the width direction of the sliding rail arm through the first sliding rail 313, the upper surface of the sliding rail arm 32 is provided with the second sliding rail 322, the structures and the sizes of the first sliding rail 313 and the second sliding rail 322 are the same, as shown in fig. 14, when the axes of the first sliding rail 313 and the second sliding rail 322 are required to be overlapped, a worker operates the second motor 314 in the operating chamber 14, the second motor 314 drives the driving gear 315 to rotate, the driving gear 315 drives the driven gear 316 to rotate, the driven gear drives the connecting shaft 319 and the second bevel gear 318 to synchronously rotate, and the second bevel gear 318 simultaneously drive the two first sliding rails 317 to rotate along the width direction of the sliding rail arm 31, the two bevel gears 32 respectively rotate 90 degrees clockwise and anticlockwise, and the axes of the first sliding rail 313 and the second sliding rail 322 are overlapped. This can lengthen the sliding distance of the slide imaging device 4 in the width direction of the slide arm, thereby increasing the detection range of the slide imaging device 4.
As shown in fig. 7, the bottom of the first slider 33 is provided with a sliding groove which is matched with the shape and the size of the cross section of the upper edge of the telescopic slide 21, the inside of the first slider 33 is provided with a cavity, the inside of the first slider 33 is fixedly provided with a third motor 331, the third motor 331 is electrically connected with the storage battery 34, the output end of the third motor 331 is coaxially and fixedly provided with a third driving gear 332, the inner wall of the first slider 33 is rotationally connected with a third connecting shaft 335 along the direction perpendicular to the sliding direction of the third driving gear, the third connecting shaft 335 is coaxially and fixedly provided with a third driven gear 333, the third driven gear 333 is meshed with the third driving gear 332, the third driven gear 333 is coaxially and fixedly provided with a first rail wheel 334 along the two axial sides of the third connecting shaft, the first rail wheel 334 abuts against the upper edge of the telescopic slide 21, and the width of the first rail wheel 334 is larger than or equal to the width of the upper edge of the telescopic slide 21, so that the sliding block can slide 21 can slide under the condition that the telescopic slide 21 does not stretch, the sliding block can slide 211 slides on the outer slide 211 and also slide 212 after the telescopic slide 21 stretches, and the sliding block can not slide on the inner slide 212, and the sliding rails with various shapes of the cross section shapes can be matched. When the sliding table 31 needs to slide on the telescopic slide way 21, the operator controls the motor three 331 to operate in the control room 14, the motor three 331 drives the driving gear three 332 to rotate, the driving gear three 332 drives the driven gear three 333 to rotate, the driven gear three 333 drives the connecting shaft and the first rail wheel 334 to synchronously rotate, the first rail wheel 334 walks on the upper edge of the telescopic slide way 21, the first rail wheel 334 drives the first slider 33 to slide on the telescopic slide way 21, and the sliding of the sliding detection device in the length direction of the slide way arm is realized.
As shown in fig. 4 and 5, the sliding camera device 4 includes a camera 42 and a second slider 41, the camera 42 may adopt a fixed type chute, a cavity is formed in the second slider 41, a motor four is disposed in the second slider 41, a power supply mount is fixedly mounted in the second slider 41, a power supply mount is electrically connected with the input core 411, the power supply in the second slider 41 is electrically connected with the input core 411 along the width direction of the slideway arm, an illuminating lamp is disposed on the camera 42, one side surface of the second slider 41 opposite to the charging seat 35 is provided with an input core 411, a sliding groove adapted to the cross section shape and size of the top end of the first slider 313 and the second slider 322 is formed in the bottom of the second slider 41, a motor four is disposed in the second slider 41, a power supply mount is fixedly mounted in the second slider 41 through a power supply mount, a power supply mount is electrically connected with the input core 411, the power supply in the fourth motor is electrically connected with the power supply mount, the power supply in the second slider 41 is electrically connected with the power supply core along the width direction of the slideway arm, when the sliding device 4 is in a non-operating state, the second slider 41 is fixedly connected with the driving wheel and the driving wheel is mounted on the driving wheel along the four coaxial with the driving wheel, and the driving wheel is mounted on the driving wheel and the driven wheel and the driving wheel. The sliding principle of the second slider 41 is the same as that of the first slider 33, the internal structure of the second slider is not shown in the figure, when the sliding camera device 4 slides on the first slide rail 313 and the second slide rail 322, a worker controls the fourth motor in the control chamber 14, so that the second slider 41 drives the camera 42 to slide along the width direction of the slide rail arm, and meanwhile, as the light of the bottom surface of the bridge is darker, the lighting lamp can illuminate the bottom of the bridge, thereby facilitating the observation of cracks of the bottom of the bridge.
As shown in fig. 3 and 7, the truss 2 is adopted as the slide rail arm, the stability of the truss 2 is high, the weight is light, two telescopic slide rails 21 parallel to each other are arranged on the upper surface of the truss 2 along the length direction of the truss 2, each telescopic slide rail 21 comprises an outer slide rail 211 and an inner slide rail 212, the cross sections of the outer slide rail 211 and the inner slide rail 212 are U-shaped, the inner slide rail 212 is slidably connected in the outer slide rail 211 along the length direction of the inner slide rail 212, the outer side surfaces of the inner slide rail 212 are tightly adhered to the inner side surfaces of the outer slide rail 211, the free ends of the two inner slide rails 212 are fixedly connected with a stop lever 214, when the inner slide rail 212 slides out, the stop lever 214 can stabilize the free ends of the inner slide rail 212, meanwhile, the upper ends of two side walls of the outer slide rail 211 are provided with flanges which are horizontally outwards, the upper ends of the two side walls of the inner slide rail 212 are provided with flanges which are horizontally inwards, the inner slide rail 212 is flush with the upper edges of the outer slide rail 211, the cross sections of the side walls of the telescopic slide rail 21 form a T-shaped, so that the contact area between the top surface of the telescopic slide rail 21 and the bottom surface of the sliding detection device can be increased, the pressure of the telescopic slide rail 21 is dispersed, and the sliding detection device on the inner side surfaces of the inner slide rail 21 is fixedly connected with the stop levers 214, and the free ends of the telescopic slide rail 21 can be prevented from sliding out from being separated from the telescopic slide rail 21, and stable, and the telescopic slide rail 21, and the upper can be detected, and stable, and the upper slide rail 21, and the device can be prevented from being slid, and extended, and upwards, and stable; slide holes 213 are respectively formed in opposite faces of the two outer slide ways 211 along the length direction of the truss 2, a movable rod 24 is arranged at one end, close to the lifting arm 13, between the two outer slide ways 211, two ends of the movable rod 24 penetrate through the slide holes 213 and are respectively fixedly connected with the two inner slide ways 212, a traction device is arranged in the truss 2 and connected with the movable rod 24, when the telescopic slide way 21 stretches, a worker operates the traction device in the operating room 14, the traction device drives the movable rod 24 to move towards the free end of the truss 2, and the movable rod 24 simultaneously pushes the two inner slide ways 212 to slide towards the free end of the truss 2, so that the telescopic slide way 21 stretches. This can increase the sliding distance of the sliding detection device in the longitudinal direction of the truss 2, thereby increasing the detection range of the sliding detection device.
As shown in fig. 8 and 9, the traction device comprises a pulley block, a first driving gear 27, a first driven gear 28 and a first motor 26, wherein the pulley block is arranged in the truss 2 and is provided with two groups of pulleys 22, each group of pulley block is provided with four pulleys 22, the free end and the connecting end of the truss 2 are respectively arranged up and down in two, the two groups of pulley blocks are symmetrically arranged along the width of the truss 2, the two pulleys 22 along the width direction of the truss 2 are rotationally connected with the truss 2 through a first connecting shaft 23, the pulleys 22 in the pulley block are connected through a flexible belt 25, the flexible belt 25 is fixedly connected with a movable rod 24, the first driven gear 28 is coaxially and fixedly connected on the first connecting shaft 23, the first driving gear 27 is coaxially and fixedly arranged at the output end of the first motor 26, the output shaft of the first motor 26 is parallel to the first connecting shaft 23 connected with the first driven gear 28, the first driving gear 27 is meshed with the first driven gear 28, when the telescopic slide 21 stretches, a worker manipulates the first motor 26 in the control chamber 14, the first motor 26 drives the driving gear to rotate, the driving gear drives the first driven gear to rotate, the first driven gear drives the first connecting shaft 23 to rotate, the first flexible pulley 23 drives the first connecting shaft 23 to move to the second connecting shaft 23 to the first connecting shaft 23 to move to the second connecting shaft 24, and simultaneously, the first flexible pulley 22 slides to freely slide to the second pulley 22 and move to the second flexible pulley 22 simultaneously.
As shown in fig. 4, the free end of the slide rail arm 32 is provided with a second stop 321, and a first stop 312 is provided on one side of the upper surface of the support stand 311 near the lifting arm 13. The first stop block 312 plays a limiting role, and can prevent the sliding rail arm 32 from excessively rotating, so that the axes of the first 313 and second 322 sliding rails cannot be overlapped, and the camera device is influenced to stably pass through the butt joint position of the first 313 and second 322 sliding rails; the second stop 321 can prevent the camera device from sliding out of the second slide rail 322.
According to the invention, a worker operates the lifting column 11 in the control room 14, the telescopic boom 12 is jacked up through the lifting of the lifting column 11, the lifting boom 13 and the truss 2 are simultaneously lifted, when the bottom surface of the truss 2 exceeds the height of the top surface of the anti-collision guardrail of the bridge 5, the worker operates the rotating device at the lower end of the lifting column 11, simultaneously drives the telescopic boom 12, the lifting boom 13 and the truss 2 to rotate towards the anti-collision guardrail, after the rotation is finished, the worker operates the rotating device at the lower end of the lifting boom 13, drives the truss 2 to horizontally rotate, after the truss 2 is parallel to the axis of the bridge 5, operates the telescopic boom 12, enables the telescopic boom 12 to extend and drives the truss 2 to move to the outer side of the anti-collision guardrail, the worker continuously operates the lifting boom 13, enables the lower end of the lifting boom 13 to drive the truss 2 to descend below the bottom surface of the bridge 5, and then operates the rotating device at the lower end of the lifting boom 13, so that the truss 2 rotates below the bottom surface of the bridge 5, at the moment, if the bottom surface of the bridge 5 is wider, the bottom surface of the bridge 5 is matched with the width of the bridge 5, the worker operates the first motor 26 in the control room 14, the first motor drives the first driving gear 26 to drive the driven gear 23 to rotate, and drives the driven gear 23 to freely move to the driven gear 22 to the two free pulleys 22 to rotate, and simultaneously drives the driven shafts 22 to freely move, and the flexible pulleys 22 to freely move to the two pulleys 22 to the flexible shafts 22 to the two sides of the flexible shafts 22, and the flexible shafts to rotate, and the flexible shafts to drive the flexible shafts to the two shafts to move 23, and the two sides of the flexible shafts to rotate, and the two shafts to the two sides 23, and the two sides of the flexible shafts are simultaneously, and the two shafts are correspondingly; after the telescopic slide way 21 is extended, a sliding detection device slides on the telescopic slide way 21, a worker controls a motor III 331 to operate in the control room 14, the motor III 331 drives a driving gear III 332 to rotate, the driving gear III 332 drives a driven gear III 333 to rotate, the driven gear III 333 drives a connecting shaft and a rail wheel I334 to synchronously rotate, the rail wheel I334 walks on the upper edge of the telescopic slide way 21, the rail wheel I334 drives a sliding block I33 to slide on the telescopic slide way 21, and the sliding of the sliding detection device in the length direction of the truss 2 is realized; if the sliding length of the sliding camera device 4 along the width direction of the truss 2 is to be increased, a worker controls the second motor 314 in the control chamber 14, the second motor 314 drives the second driving gear 315 to rotate, the second driving gear 315 drives the second driven gear 316 to rotate, the second driven gear drives the second connecting shaft 319 and the second bevel gear 318 to synchronously rotate, the second bevel gear 318 simultaneously drives the first bevel gear 317 to rotate, the first bevel gear 317 respectively drives the first slide rail arms 32 to respectively rotate 90 degrees clockwise and anticlockwise, at this time, the axes of the first slide rail 313 and the second slide rail 322 coincide, and the sliding length of the sliding camera device 4 along the width direction of the truss 2 is increased; finally, the camera 42 feeds back the image of the bridge floor crack in the form of a signal to the control cabin 14, by means of which the staff member analyses the state of the crack and takes corresponding remedial action. The crack detection can be carried out on the bottom surface of the bridge 5 within a rectangular range, the vehicle body 1 does not need to be frequently moved, the crack detection on the bottom surface of the bridge 5 does not need to be carried out manually, the manual detection cost is reduced, the safety of detection work is improved, and meanwhile, the detection device is simple in structure, low in manufacturing cost and convenient to operate.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (9)
1. The utility model provides a bridge bottom surface crack detection device, includes automobile body (1) and bearing structure, be equipped with on automobile body (1) and control room (14), bearing structure includes lift post (11), telescopic boom (12) and lift arm (13), the lower extreme of lift post (11) with automobile body (1) vertical rotation is connected, the stiff end of telescopic boom (12) with the upper end fixed connection of lift post (11), the upper end of lift arm (13) with the free end fixed connection of telescopic boom (12), characterized in that still includes slide arm and slip detection device, the link of slide arm with the lower extreme horizontal rotation of lift arm (13) is connected, be equipped with telescopic slide (21) along its length direction on the slide arm, slip detection device passes through telescopic slide (21) sliding connection is in on the slide arm, slip detection device is including can be followed the horizontal perpendicular to telescopic slide's length direction slip and inside be equipped with the slider (4) and can charge and power supply slider (3), the width of slide arm (4) is followed horizontal rotation direction detection device (32) when the horizontal rotation is followed on the slide arm (3) is connected to the horizontal rotation device (32), the sliding rail axis of the sliding rail arm (32) is overlapped with the sliding rail axis of the sliding image pickup device (4), so that the sliding length of the sliding image pickup device (4) is increased; when the sliding image pickup device (4) is in a non-working state, a power input end in the sliding image pickup device (4) is in contact with a power supply output end in the sliding device and is charged.
2. The bridge bottom crack detection device according to claim 1, wherein the sliding device (3) comprises a sliding table (31), a first sliding block (33), a storage battery (34) and a charging seat (35), the first sliding block (33) is provided with two sliding blocks and is fixedly arranged on the lower surface of the sliding table (31), the sliding table (31) is slidably connected to the telescopic sliding rail (21) along the length direction of the sliding rail arm through the two first sliding blocks (33), the cross section of the part of the sliding table (31) close to the lifting arm (13) is of a convex shape and is of a uniform thin-wall structure, the charging seat (35) is fixedly arranged on the upper surface of the part of the sliding table (31) close to the lifting arm (13), one side surface of the charging seat (35) close to the lifting arm is provided with an output core (351), the sliding table (31) is far away from the lifting arm (13) is provided with a mounting groove, the storage battery (34) is detachably and fixedly arranged in the mounting groove, the charging seat (35) is electrically connected with the storage battery core (34) and is in a non-image pickup device (4) in a state of being in which the charging seat (4) is in contact with the input side surface (4), the slide rail arm (32) is provided with two slide rail arms and is arranged on support tables (311) on two sides of the slide rail arm (31) along the width direction of the slide rail arm, a motor II (314) is arranged in the slide rail arm (31), the motor II (314) is electrically connected with a storage battery (34), a driving gear II (315) is coaxially and fixedly arranged at the output end of the motor II (314), a connecting shaft II (319) is rotationally connected with the upper part of the inner wall of the slide rail arm (31) in a direction which is horizontally perpendicular to the axis direction of the slide rail arm (31), a driven gear II (316) is coaxially and fixedly arranged on the shaft body of the connecting shaft II (319), the driving gear II (315) is meshed with the driven gear II (316), bevel gears II (318) are coaxially and fixedly arranged at two ends of the connecting shaft II (319), bevel gears I (317) are horizontally and rotationally connected to the supporting tables (311) at two sides of the sliding table (31) along the width direction of the sliding table arms respectively, the bevel gears I (317) are meshed with the bevel gears II (318), a rotating shaft connected with the bevel gears I (317) vertically penetrates through the top surface of the supporting table (311), the connecting end of the sliding table arm (32) is fixedly connected with the top end of the rotating shaft and is positioned on the upper surface of the supporting table (311), the upper surface of the sliding table arm (32) and the top surface of the sliding table (31) are positioned on the same horizontal plane, the top surface of sliding table (31) is equipped with slide rail one (313), slide camera device (4) are followed through slide rail one (313) the width direction of slide rail arm with sliding table (31) sliding connection, the upper surface of slide rail arm (32) is equipped with slide rail two (322), slide rail one (313) with structure and the size of slide rail two (322) are the same.
3. The bridge bottom surface crack detection device according to claim 2, wherein a chute matched with the shape and the size of the cross section of the upper edge of the telescopic slide way (21) is formed in the bottom of the first sliding block (33), a cavity is formed in the first sliding block (33), a third motor (331) is fixedly installed in the first sliding block (33), the third motor (331) is electrically connected with the storage battery (34), a third driving gear (332) is fixedly installed at the output end of the third motor (331) coaxially, a third connecting shaft (335) is connected to the inner wall of the first sliding block (33) in a rotating mode along the direction perpendicular to the sliding direction of the third motor, a third driven gear (333) is fixedly installed on the third connecting shaft (335) coaxially, the third driven gear (333) is meshed with the third driving gear (332), a first rail wheel (334) is fixedly installed on the two sides of the third sliding block coaxially, the first rail wheel (334) abuts against the upper edge of the telescopic slide way (21), and the first rail wheel (334) is larger than or equal to the width of the telescopic slide way (21).
4. The bridge bottom surface crack detection device according to claim 2, wherein the sliding camera device (4) comprises a camera (42) and a second sliding block (41), the camera (42) is installed on the top surface of the second sliding block (41), the second sliding block (41) is horizontally and slidably connected to the top surface of the sliding table (31) along the width direction of the sliding rail arm through the first sliding rail (313), an illuminating lamp is arranged on the camera (42), and an input core (411) is arranged on one side surface of the second sliding block (41) opposite to the charging seat (35).
5. The bridge bottom surface crack detection device according to claim 4, wherein a sliding groove matched with the shape and the size of the top end cross section of the sliding rail I (313) and the sliding rail II (322) is formed in the bottom of the sliding block II (41), a cavity is formed in the sliding block II (41), a motor IV is arranged in the sliding block II (41), a power supply mounting seat is fixedly arranged in the motor IV through the power supply mounting seat, the power supply mounting seat is electrically connected with the input core (411), the motor IV is electrically connected with the power supply in the mounting seat, the power supply in the camera (42) is electrically connected with the input core (411), when the sliding camera device (4) is in a non-working state, the input core (411) on the side surface of the sliding block II (41) is in contact with the output core (351) on the side surface of the charging seat and charges the power supply in the camera (42), a driving gear IV is fixedly arranged at the output end of the motor IV, the driving gear IV is coaxially and fixedly arranged on the inner wall of the sliding block II, the driven gear IV is coaxially and fixedly connected with the driven gear IV along the four side surfaces of the driving gear IV, and the driven gear IV is coaxially and fixedly connected with the driven gear IV on the two sides of the driving gear.
6. The bridge floor crack detection device according to claim 1, wherein the chute arm is a truss (2).
7. The bridge bottom surface crack detection device according to claim 6, wherein two telescopic slideways (21) are arranged in parallel with each other and fixedly connected to the upper surface of the truss (2) along the length direction of the truss (2), the telescopic slideways (21) comprise an outer slideways (211) and an inner slideways (212), the cross sections of the outer slideways (211) and the inner slideways (212) are U-shaped, the inner slideways (212) are slidably connected to the inner slideways (211) along the length direction of the inner slideways, the outer side surfaces of the inner slideways (212) are tightly adhered to the inner side surfaces of the outer slideways (211), the free ends of the two inner slideways (212) are fixedly connected with stop rods (214), the upper ends of the two side walls of the outer slideways (211) are provided with horizontal outward flanges, the upper ends of the two side walls of the inner slideways (212) are provided with horizontal inward flanges, the cross sections of the side walls of the inner slideways (211) form a T shape, the two side walls of the inner slideways (21) are slidably connected to the outer slideways (211) along the length direction of the two outer slideways (211) are provided with two parallel and level holes (213) respectively, the two outer slideways (213) are respectively connected with two end holes (213) and two ends (213) are respectively arranged between two end-shaped slideways (24), and a traction device is arranged in the truss (2), and the traction device is connected with the movable rod (24).
8. The bridge floor crack detection device according to claim 7, wherein one end of the two side walls of the inner slide (212) close to the lifting arm (13) is wedge-shaped, and the slopes of the two side walls are opposite, and the free ends of the two side walls of the outer slide (211) are wedge-shaped, and the slopes of the two side walls are outwards arranged.
9. The bridge bottom surface crack detection device according to claim 7, wherein the traction device comprises pulley blocks, a driving gear one (27), a driven gear one (28) and a motor one (26), wherein the pulley blocks are arranged in the truss (2) and are provided with two groups of pulleys (22), each group of pulley blocks is provided with at least two pulleys (22), the two groups of pulley blocks are symmetrically arranged along the width of the truss (2), the two pulleys (22) along the width direction of the truss (2) are rotationally connected with the truss (2) through a connecting shaft one (23), the pulleys (22) in the pulley blocks are connected with each other through a flexible belt (25), the flexible belt (25) is fixedly connected with the moving rod (24), the driven gear one (28) is coaxially and fixedly connected with one connecting shaft one (23), the driving gear one (27) is coaxially and fixedly arranged at the output end of the motor one (26), and the output shaft of the motor one (26) is in parallel with the driving gear one connecting shaft (23) connected with the driven gear one (28).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117538330A (en) * | 2023-10-27 | 2024-02-09 | 宁波经济技术开发区城建设计有限公司 | Bridge crack measuring device and measuring method thereof |
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