CN103103919A - Cable bent tower with self detection device and cable bent tower surface crack detection method - Google Patents

Abstract

A cable tower with a self-detection device, the upper part of the cable tower is provided with a support frame driven by a transmission cable, and the support frame moves up and down on the surface of the cable tower under the traction of the drive cable, and the detection device is mounted on the support frame , the detection device moves together with the support frame to complete the detection work on the surface of the cable tower; The surface image is spliced and restored to a complete cable tower surface image, and treatment measures are formulated according to the crack distribution on the image. The beneficial technical effects of the present invention are: simple structure, low cost, easy reconstruction of bridges in service, high-frequency real-time monitoring of cable towers, and timely detection of problems at the early stage of disease, ensuring the safety of bridge structures.

Description

Cable tower and cable tower surface crack detection method with self-detection device

technical field

The present invention relates to a cable tower detection device for a cable-stayed bridge, in particular to a cable tower with a self-detection device and a method for detecting cracks on the surface of the cable tower.

Background technique

The cable-stayed bridge is a more common form in bridge construction. The cable tower is the key link in the whole bridge. The health of the cable tower is related to the structural safety of the entire bridge. Therefore, the health of the cable tower must be monitored. Once the cable tower appears Damage needs to be dealt with immediately to ensure the safety of bridge operation.

The cable tower is exposed to the outside for a long time, exposed to the wind and the sun, and it is easy to crack or peel off the protective layer due to the temperature difference between the inside and outside of the cable tower, improper structure and reinforcement, and external load; the general height of the cable tower varies from tens of meters, even hundreds of meters. In the existing technology, when monitoring it, it can only be analyzed according to the data collected by manual observation or pre-embedded sensors. The problem is that if you want to obtain more detailed and real-time information on the surface condition of the cable tower, you can only observe the surface of the cable tower by building climbing facilities. The construction of climbing facilities is not only costly and time-consuming , labor-intensive, and takes up a lot of space, it is necessary to close the bridge traffic, so it is not suitable to be carried out frequently, so it is difficult to realize long-term and effective monitoring of the surface of the cable tower.

Contents of the invention

In view of the problems in the background technology, the present invention proposes a cable tower with a self-detection device, including a cable tower, an upper guide pulley set is arranged on the upper part of the cable tower, a lower guide pulley set is provided on the lower part of the cable tower, and a lower guide pulley set is arranged on the lower part of the cable tower. The power device is fixed on the surface of the cable tower below; the transmission cable is arranged between the upper guide pulley block, the lower guide pulley block and the power device, and the drive cable is connected end to end to form a closed loop. The upper part of the closed loop is guided by the upper guide pulley set, and the middle part of the closed loop is guided by the lower guide pulley Pulley group guide, the lower part of the closed loop is sleeved on the drive wheel of the power device, and the transmission cable circulates among the upper guide pulley group, the lower guide pulley group and the power device under the transmission of the power device; The cable body in the middle part of the transmission cable is fixedly connected with a support frame. The vertical position of the support frame is between the upper guide pulley group and the lower guide pulley group. A guide pulley group is arranged on the outer surface of the support frame. The transmission cable body is guided by the guide pulley; a plurality of running wheels are arranged on the inner surface of the supporting frame, and the running wheels are in contact with the surface of the cable tower; a detection and maintenance device is arranged on the supporting frame.

The above-mentioned structure can be set simultaneously in the bridge construction, and the cable tower of the bridge in service can also be retrofitted once to make the cable tower of the bridge in service have a self-inspection function; The device can be moved on the cable tower very conveniently. According to the different types of detection and maintenance devices installed, it can meet different operation requirements. If it is equipped with a video acquisition device, it can be used to obtain image information on the cable tower surface to assist engineering The personnel analyze the health status of the cable tower surface. If it is equipped with a spraying device, it can be used to spray the cable tower surface; the aforementioned structure is very simple, and its transmission process is realized by pulleys, which has almost no requirements for the cable tower surface, unlike lifting The ladder device requires a very complicated power system and walking track, and has almost no damage to the surface of the cable tower. It is extremely suitable for the transformation of the cable-stayed bridge in service, and is used for high-frequency and real-time monitoring of the cable tower surface.

On the basis of the foregoing scheme, the present invention also proposes the following preferred implementation for the upper guide pulley set: the upper guide pulley set is composed of a bracket, a guide wheel and a pinch wheel; the guide wheel and the pinch wheel are arranged on the bracket, and the bracket It is fixedly connected with the surface of the cable tower; the transmission cable is sleeved on the rim of the guide wheel, and the pinch wheel is set close to the guide wheel, and the pinch wheel makes the drive cable close to the rim of the guide wheel. The guide wheel is used to guide the transmission cable, and the pressing wheel is used to ensure the tightness of the contact between the transmission cable and the guide wheel.

On the basis of the aforementioned scheme, the present invention also proposes the following preferred embodiment for the lower guide pulley set: the lower guide pulley set is composed of a positioning frame, a guide pulley and a limiting wheel; the guiding pulley and the limiting wheel are arranged on the positioning frame , the positioning frame is fixedly connected to the surface of the cable tower; the inner side of the transmission cable on the side close to the surface of the cable tower on the closed loop is in contact with the rim of the guide pulley, and the outer side of the transmission cable on the side away from the surface of the cable tower on the closed loop is in contact with the wheel of the limit wheel edge contact. The guide pulley and the limit wheel can ensure that the transmission cables on the inner and outer sides of the closed loop are all close to the surface of the cable tower.

On the basis of the foregoing scheme, the present invention also proposes the following preferred implementation for the guide pulley block: the guide pulley block is composed of an inner guide wheel and an outer guide wheel, the inner guide wheel and the outer guide wheel are arranged adjacently, and the transmission cable is placed inside In the gap between the guide wheel and the outer guide wheel. The inner guide wheel is used to avoid interference between the transmission cable and the support frame, and the outer guide wheel makes the tight contact between the transmission cable and the inner guide wheel.

In order to keep the left and right sides of the support frame balanced during walking, the present invention also makes the following improvements: the number of the upper guide pulley blocks is two, and the positions of the two upper guide pulley blocks are along the vertical symmetry line of the support frame Symmetrical setting; the number and position of the lower guide pulleys correspond to the upper guide pulleys one by one; the number and position of the drive wheels on the power unit correspond to the upper guide pulleys one by one; the number and position of the guide pulleys on the support frame correspond to the upper guide pulleys One to one correspondence.

In order to avoid the shaking of the support frame and improve the walking ability of the support frame, the present invention also makes the following improvements: the shape of the support frame is U-shaped. The direction of extension is uniformly set.

The detection and maintenance device can adopt a fixed installation method. In order to further improve the performance of the detection and maintenance device, the present invention also makes the following improvements: a chain transmission mechanism is arranged on the inner side of the support frame, and the chain transmission mechanism drives and detects The maintenance device moves circumferentially along the cable tower in the horizontal plane.

The detection and maintenance device is one or both of a video acquisition device and a paint spraying device.

In order to improve the contact effect between the traveling wheel and the cable tower surface, the present invention also makes the following improvements: the traveling wheel is composed of a connecting frame and two wheels; The two wheels are respectively arranged at the two ends of the connecting frame. When the support frame moves to an uneven position on the cable tower, one of the wheels will be lifted by the protrusion on the cable tower surface, but under the action of the lever structure, the other wheel will be in close contact with the cable tower surface It is more compact to avoid the separation of the traveling wheel from the surface of the tower due to the uneven surface of the tower.

Based on the aforementioned structure, the present invention also proposes a method for detecting cracks on the surface of a cable tower, the hardware equipment of which includes the aforementioned cable tower with a self-detection device, and a video acquisition device mounted on the self-detection device. The acquisition device moves along the cable tower in the horizontal plane; the method includes: 1) driving the self-detection device to move along the cable tower axis, and when the self-detection device moves to a certain height, the self-detection device is parked,

2) The transmission video acquisition device moves in the horizontal plane, and collects images on the peripheral surface of the cable tower at this height; at the same time as the images are collected, the collected images are serially numbered in time sequence;

3) After the image acquisition of the circumferential surface of the cable tower at this height is completed, return to step 1), and continue to collect images of the circumferential surface of the cable tower at the next height;

4) After the image acquisition of the cable tower surface within the motion range of the self-detection device is completed, the collected images are output to the computer, and the collected images are manually identified to identify whether there are cracks on the cable tower surface; Graphically mark the trajectory and size of the identified cracks;

5) After the screening of all images is completed, the images are spliced and restored to a complete cable tower surface map according to the numbers in step 2), and treatment measures are formulated according to the cable tower surface map.

The beneficial technical effects of the present invention are: simple structure, low cost, easy reconstruction of bridges in service, high-frequency real-time monitoring of cable towers, and timely detection of problems at the early stage of disease, ensuring the safety of bridge structures.

Description of drawings

Fig. 1, structural representation of the present invention;

Figure 2. Schematic diagram of the structure of the upper guide pulley block;

Figure 3. Schematic diagram of the structure of the lower guide pulley block;

Fig. 4. Structural schematic diagram of guide pulley block;

Figure 5. Schematic diagram of the support frame structure;

Figure 6. Schematic diagram of the structure of the traveling wheel.

Detailed ways

A cable tower with a self-detection device, comprising a cable tower 1, the upper part of the cable tower 1 is provided with an upper guide pulley block 2, the lower part of the cable tower 1 is provided with a lower guide pulley block 3, and the cable tower 1 below the lower guide pulley block 3 A power unit 4 is fixed on the surface; a transmission cable 6 is arranged between the upper guide pulley set 2, the lower guide pulley set 3 and the power unit 4, and the transmission cable 6 is connected end to end to form a closed loop. The upper part of the closed loop is guided by the upper guide pulley set 2, and the middle part of the closed loop Guided by the lower guide pulley group 3, the lower part of the closed loop is sleeved on the driving wheel of the power device 4, and the transmission cable 6 circulates among the upper guide pulley group 2, the lower guide pulley group 3 and the power device 4 under the driving action of the power device 4 The cable body of the transmission cable 6 middle part near the cable tower 1 surface side on the closed loop is fixedly connected with a support frame 5, and the vertical position of the support frame 5 is between the upper guide pulley block 2 and the lower guide pulley block 3, and the support frame 5 A set of guide pulleys is arranged on the outer surface, and the cable body of the transmission cable 6 on the side away from the surface of the cable tower 1 on the closed loop is guided by the guide pulley; Contact; the support frame 5 is provided with a detection and maintenance device.

Further, the upper guide pulley group 2 is composed of a bracket 2-1, a guide wheel 2-2 and a pinch wheel 2-3; the guide wheel 2-2 and the pinch wheel 2-3 are arranged on the bracket 2-1, and the bracket 2-1 is fixedly connected with the surface of the cable tower 1; the transmission cable 6 is sleeved on the rim of the guide wheel 2-2, and the pinch wheel 2-3 is set close to the guide wheel 2-2, and the pinch wheel 2-3 makes the drive cable 6 is close to the rim of guide wheel 2-2.

Further, the lower guide pulley group 3 is composed of a positioning frame 3-1, a guide pulley 3-2 and a limiting wheel 3-3; the guiding pulley 3-2 and the limiting wheel 3-3 are arranged on the positioning frame 3-1 , the positioning frame 3-1 is fixedly connected to the surface of the cable tower 1; the inner side of the transmission cable 6 on the side close to the surface of the cable tower 1 on the closed loop is in contact with the rim of the guide pulley 3-2, and the inner side of the transmission cable 6 on the side away from the surface of the cable tower 1 on the closed loop The outer side of transmission cable 6 contacts with the wheel rim of spacer wheel 3-3.

Further, the guide pulley set is composed of an inner guide wheel 5-1 and an outer guide wheel 5-2, the inner guide wheel 5-1 and the outer guide wheel 5-2 are arranged adjacently, and the transmission cable 6 is placed on the inner guide wheel 5-1 And in the gap between outer guide wheel 5-2.

Further, the number of the upper guide pulley sets 2 is two, and the positions of the two upper guide pulley sets 2 are arranged symmetrically along the vertical symmetry line of the support frame 5; Corresponding; the quantity and the position of the drive wheel on the power unit 4 correspond to the upper guide pulley group 2 one by one;

Further, the shape of the support frame 5 is U-shaped, the U-shaped support frame 5 surrounds the outer wall of the cable tower 1, and a plurality of running wheels are evenly arranged along the extending direction of the U-shape.

Further, a chain transmission mechanism is provided on the inner side of the support frame 5, and the chain transmission mechanism drives the detection and maintenance device to move along the circumferential direction of the cable tower 1 in the horizontal plane.

Further, the detection and maintenance device is one or both of a video acquisition device and a paint spraying device.

Further, the traveling wheels are composed of a connecting frame 7 and two wheels 8; the middle part of the connecting frame 7 is connected to the support frame 5 in rotation, and the two ends of the connecting frame 7 form a lever structure, and the two wheels 8 are respectively arranged on two sides of the connecting frame 7. end.

A method for detecting cracks on the surface of a cable tower, its hardware equipment includes the cable tower with a self-detection device described in claim 1, and a video acquisition device mounted on the self-detection device, and the chain transmission mechanism drives the video acquisition device along the horizontal plane. The cable tower 1 moves in a circumferential direction; the method includes: 1) driving the self-detection device to move along the axis of the cable tower 1, and when the self-detection device moves to a certain height, stop the self-detection device,

2) The transmission video acquisition device moves in the horizontal plane, and collects images of the circumferential surface of the cable tower 1 at the height; while the images are being collected, the collected images are serially numbered in time sequence;

3) After the image acquisition of the circumferential surface of the cable tower 1 at this height is completed, return to step 1), and continue to collect images of the circumferential surface of the cable tower 1 at the next height;

4) After the image collection of the cable tower 1 surface within the motion range of the self-detection device is completed, the collected images are output to the computer, and the collected images are manually identified to identify whether the surface of the cable tower 1 exists Cracks; mark the trajectory and size of the identified cracks by means of graphics;

5) After the screening of all images is completed, the images are spliced and restored to a complete cable tower surface map according to the numbers in step 2), and treatment measures are formulated according to the cable tower surface map.

Claims (10)

1. Sarasota with self-test device, comprise Sarasota (1), it is characterized in that: described Sarasota (1) top is provided with leading block group (2), described Sarasota (1) bottom is provided with lower leading block group (3), and Sarasota (1) surface of lower leading block group (3) below is fixed with power set (4); Be furnished with transfer cable (6) between upper leading block group (2), lower leading block group (3) and power set (4) three, the end to end formation closed loop of transfer cable (6), lead by upper leading block group (2) in closed loop top, lead by lower leading block group (3) in the closed loop middle part, the closed loop bottom is socketed on the driving wheel of power set (4), transfer cable (6) under the gearing of power set (4) between upper leading block group (2), lower leading block group (3) and power set (4) three shuttling movement; Be fixedly connected with a bearing support (5) near the cable body in the middle part of the transfer cable (6) of the surperficial side of Sarasota (1) on closed loop, the vertical position of bearing support (5) is positioned between leading block group (2) and lower leading block group (3), be provided with the leading block group on the lateral surface of bearing support (5), transfer cable (6) the cable body away from the surperficial side of Sarasota (1) on closed loop leads by leading block; Be provided with a plurality of travelling wheels on described bearing support (5) medial surface, travelling wheel and Sarasota (1) Surface Contact; Bearing support is provided with the detection attending device on (5).

2. the Sarasota with self-test device according to claim 1, it is characterized in that: described upper leading block group (2) is comprised of support (2-1), directive wheel (2-2) and contact roller (2-3); Directive wheel (2-2) and contact roller (2-3) are arranged on support (2-1), and support (2-1) is fixedly connected with Sarasota (1) surface; Transfer cable (6) is socketed on the wheel rim of directive wheel (2-2), and contact roller (2-3) arranges near directive wheel (2-2), and contact roller (2-3) makes transfer cable (6) be close to the wheel rim of directive wheel (2-2).

3. the Sarasota with self-test device according to claim 1, it is characterized in that: described lower leading block group (3) is comprised of locating rack (3-1), leading block (3-2) and position-limited wheel (3-3); Leading block (3-2) and position-limited wheel (3-3) are arranged on locating rack (3-1), and locating rack (3-1) is fixedly connected with Sarasota (1) surface; Inboard near the transfer cable (6) of the surperficial side of Sarasota (1) on closed loop contacts with the wheel rim of leading block (3-2), and the outside away from the transfer cable (6) of the surperficial side of Sarasota (1) on closed loop contacts with the wheel rim of position-limited wheel (3-3).

4. the Sarasota with self-test device according to claim 1, it is characterized in that: described leading block group is comprised of interior directive wheel (5-1) and outer directive wheel (5-2), interior directive wheel (5-1) and outer directive wheel (5-2) are contiguous to be arranged, and transfer cable (6) is placed in gap between interior directive wheel (5-1) and outer directive wheel (5-2).

5. the Sarasota with self-test device according to claim 1, it is characterized in that: the quantity of described upper leading block group (2) is two, the positions of two upper leading block groups (2) arrange along the vertical line of symmetry of bearing support (5) is symmetrical; The quantity of lower leading block group (3) and position are corresponding one by one with upper leading block group (2); The quantity of the driving wheel on power set (4) and position are corresponding one by one with upper leading block group (2); The quantity of the leading block group on bearing support (5) and position are corresponding one by one with upper leading block group (2).

6. the Sarasota with self-test device according to claim 1, it is characterized in that: described bearing support (5) is shaped as U-shaped, and the bearing support of U-shaped (5) is encircled Sarasota (1) outer wall, and a plurality of travelling wheels evenly arrange along the U-shaped bearing of trend.

7. the Sarasota with self-test device according to claim 1 is characterized in that: be provided with chain drive on the medial surface of described bearing support (5), described chain drive transmission detect attending device in horizontal plane along Sarasota (1) circumferential movement.

8. the Sarasota with self-test device according to claim 1, it is characterized in that: described detection attending device is one or both in video acquisition device, painting spraying device.

9. the Sarasota with self-test device according to claim 1, it is characterized in that: described travelling wheel is comprised of link (7) and two wheels (8); Link (7) middle part is rotationally connected with bearing support (5), link (7) two ends formation lever construction, and two wheels (8) are arranged at respectively the two ends of link (7).

10. Sarasota external crack detection method, it is characterized in that: its hardware device comprises the Sarasota with self-test device claimed in claim 1, and carry video acquisition device on self-test device, chain drive transmission video acquisition device in horizontal plane along Sarasota (1) circumferential movement; The method comprises: 1) drive self-test device along Sarasota (1) axially-movable, and after self-test device moves to certain altitude, that self-test device is parked,

2) the transmission video acquisition device at horizontal in-plane moving, carries out image acquisition to the peripheral surface of this At The Height Sarasota (1); In the time of image acquisition, the visual serial number that will collect chronologically;

3) after the peripheral surface image acquisition of this At The Height Sarasota (1) is completed, return to step 1), continue the peripheral surface of next height and position place's Sarasota (1) is carried out image acquisition;

4) after the Sarasota in the self-test device range of movement (1) Surface image collection is all completed, whether the image outpuT that collects to computer, by manually the image that collects being identified, is existed the crack to screen Sarasota (1) surface; Track and size to the crack that screens out are carried out mark with the Enhanced Capability of Graphic Display And Automatic Judgment means;

5) after the examination of having completed all images, by step 2) in numbering with image connection, be reduced to complete Sarasota exterior view, work out the punishment means according to the Sarasota exterior view.

Images