Cable force monitoring device for back-cable-free cable-stayed bridge

Abstract

The cable force monitoring device comprises a cable force tester, the cable force tester is fixedly installed at one end of a moving ring, a pressure measuring base and a driving base are fixedly installed on the two side walls of the interior of the moving ring respectively, a pressure measuring roll shaft set is rotatably installed in an opening of the pressure measuring base, and a pressure measuring roll shaft set is rotatably installed in an opening of the driving base. A pressure sensor used for monitoring the pressure value of the pressure measuring roller shaft set is arranged in the pressure measuring base, a driving roller is rotationally installed in the opening of the driving base, and a motor used for controlling the driving roller to rotate is installed on the driving base. The movable ring and the cable force tester are opened and clamped on the stay cable, when the driving roller rotates, the movable ring and the cable force tester can move on the stay cable, so that cable force monitoring can be performed on different positions of the stay cable, and meanwhile, in the moving process, the pressure measuring roller shaft group can monitor the surface flatness of the stay cable in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge monitoring, and particularly relates to a cable force monitoring device for a cable-stayed bridge without backstays. Background Technique

[0002] In modern bridges, the cable-stayed bridge without backstays is an important type of bridge. Due to its remarkable landscape effect, the cable-stayed bridge without backstays has become one of the important landmark buildings in urban construction. Conventional cable-stayed bridges have stay cables on both sides of the bridge tower, while the cable-stayed bridge without backstays has stay cables only on one side. This special structural form makes the stay cables play a more crucial role in the cable-stayed bridge without backstays.

[0003] The stay cable is an important structural component of the cable-stayed bridge without backstays. However, since it is exposed to various damage factors, there are potential safety hazards, which may lead to economic losses and endanger the safety of the bridge structure. If the stay cable is damaged, the cable force distribution of the whole bridge may change. Therefore, the damage of the stay cable can be identified by monitoring the change of the cable force distribution of the whole bridge to prevent accidents. Therefore, it is particularly important to comprehensively monitor the cable force of the cable-stayed bridge without backstays during bridge construction or operation.

[0004] The cable force tester can analyze and identify the vibration fundamental frequency of the stay cable, perform spectrum analysis on the vibration fundamental frequency signal to obtain the frequencies of each order of the stay cable and display the spectrogram, and then calculate and output the cable force value of the stay cable through the frequencies of each order.

[0005] The utility model patent with the patent authorization announcement number CN216433345U discloses a bridge cable force monitoring device, which is provided with a cable force tester, an electric piston push rod, an upper clamping sleeve and a lower clamping sleeve. The electric piston push rod can conveniently drive the cable force tester to lift, so as to conveniently monitor the cable force of the whole cable, improve the cable force test efficiency, and the obtained data is accurate, light in weight, less affected by environmental factors and has less potential safety hazards.

[0006] However, the above device still has some disadvantages in actual use. Obviously, it can only monitor a certain section of the stay cable. Since the stay cable is relatively long, the whole stay cable cannot be monitored by the electric piston push rod, the monitoring range is small, and the flatness of the stay cable cannot be monitored.

[0007] Therefore, it is necessary to invent a cable force monitoring device for a cable-stayed bridge without backstays to solve the above problems. Utility Model Content

[0008] The purpose of the utility model is to provide a cable force monitoring device for a cable-stayed bridge without back cables, which solves the problems of small monitoring range and inability to monitor the surface flatness of the cable proposed in the above-mentioned background technology by arranging a movable ring, a pressure measuring roller shaft group and a driving roller.

[0009] According to one aspect of the present disclosure, the following technical solution is provided: a cable force monitoring device for a back-cable-free cable-stayed bridge, comprising a cable force tester, a moving ring, a pressure measuring base, and a driving base;

[0010] The cable force tester is fixedly mounted at one end of the moving ring;

[0011] The pressure measuring base and the driving base are respectively fixedly mounted on the inner side walls of the moving ring;

[0012] The pressure measuring base and the driving base have openings on opposite sides, a pressure measuring roller group is rotatably installed in the opening of the pressure measuring base, and a pressure sensor for monitoring the pressure value of the pressure measuring roller group is provided in the pressure measuring base;

[0013] A driving roller is rotatably mounted in the opening of the driving base, and a motor for controlling the rotation of the driving roller is mounted on the driving base.

[0014] According to at least one embodiment of the cable force monitoring device for a back-cableless cable-stayed bridge disclosed herein, the pressure measuring roller group includes a plurality of rollers, both inner side walls of the pressure measuring base are provided with slide grooves at the roller positions, the end shafts of the rollers are movably inserted into the slide grooves at corresponding positions, the pressure sensor is fixedly installed in the slide grooves, and a spring is connected between the pressure sensor and the end shaft of the roller.

[0015] According to at least one embodiment of the cable force monitoring device for a back-cable-stayed bridge disclosed herein, the motor is fixedly mounted on the top of the driving base, a first sprocket is fixedly mounted on the output shaft of the motor, a second sprocket is fixedly mounted on one end shaft of the driving roller, and the second sprocket is connected to the first sprocket via a chain transmission.

[0016] According to at least one embodiment of the cable force monitoring device for a back-cableless cable-stayed bridge disclosed herein, the movable ring is composed of a first semicircular clamping plate and a second semicircular clamping plate, one end of the first semicircular clamping plate is movably hinged to one end of the second semicircular clamping plate, and the other end of the first semicircular clamping plate is fixedly connected to the other end of the second semicircular clamping plate by bolts.

[0017] According to the cable force monitoring device for a back-cable-free cable-stayed bridge of at least one embodiment of the present disclosure, a rubber layer is provided on the surface of the driving roller.

[0018] A cable force monitoring device for a cable-stayed bridge without backstays according to at least one embodiment of the present disclosure. A wireless transceiver module and a storage battery are installed on the moving ring. The storage battery is used to supply power to the cable force tester, and the wireless transceiver module is used for wireless data transmission between the cable force tester, the pressure sensor and an external receiving device.

[0019] Technical effects and advantages of the present utility model:

[0020] By opening the moving ring and the cable force tester and clamping them on the stay cable, the motor can drive the driving roller to rotate. The pressure measuring roller shaft group and the driving roller can stably clamp the stay cable. When the driving roller rotates, the moving ring and the cable force tester can move on the stay cable, so as to monitor the cable force at different positions of the stay cable. At the same time, during the movement, the pressure measuring roller shaft group can monitor the surface flatness of the stay cable in real time, realizing the comprehensive monitoring function of the stay cable. Description of the drawings

[0021] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0022] Figure 1 is an overall structural schematic diagram of a cable force monitoring device for a cable-stayed bridge without backstays according to an embodiment of the present disclosure.

[0023] Figure 2 is a top view of a cable force monitoring device for a cable-stayed bridge without backstays according to an embodiment of the present disclosure.

[0024] Figure 3 is a cross-sectional view of a cable force monitoring device for a cable-stayed bridge without backstays according to an embodiment of the present disclosure.

[0025] Figure 4 is a cross-sectional view of a pressure measuring base of a cable force monitoring device for a cable-stayed bridge without backstays according to an embodiment of the present disclosure.

[0026] Specific reference numerals in the drawings are as follows:

[0027] 1. Moving ring; 11. First semi-circular clamping plate; 12. Second semi-circular clamping plate; 2. Cable force tester; 3. Pressure measuring base; 31. Chute opening; 4. Driving base; 5. Pressure measuring roller shaft group; 51. Roller shaft; 52. Bearing; 6. Driving roller; 61. Second sprocket; 7. Motor; 71. First sprocket; 8. Pressure sensor; 9. Spring. Detailed implementation manners

[0028] For descriptive purposes, the present disclosure may use spatial relative terms such as "under", "below", "beneath", "lower", "above", "over", "upper", and "side (e.g., as in "sidewall")" to describe the relationship of one component to another (other) component as shown in the drawings. In addition to the orientation depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacturing. For example, if the device in the drawings is flipped, a component described as "under" or "beneath" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Additionally, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0029] As Figures 1-3 shown, a cable force monitoring device for a cable-stayed bridge without a back cable in the present disclosure includes a cable force tester 2, and further includes a moving ring 1, a pressure measuring base 3, and a driving base 4;

[0030] The cable force tester 2 is fixedly installed at one end of the moving ring 1;

[0031] The pressure measuring base 3 and the driving base 4 are respectively fixedly installed on both inner sidewalls of the moving ring 1, and the stay cable is located between the pressure measuring base 3 and the driving base 4;

[0032] One side of the pressure measuring base 3 and the driving base 4 that are opposite to each other is open. A pressure measuring roller shaft group 5 is rotatably installed in the opening of the pressure measuring base 3, and a pressure sensor 8 for monitoring the pressure value of the pressure measuring roller shaft group 5 is provided in the pressure measuring base 3;

[0033] A driving roller 6 is rotatably installed in the opening of the driving base 4, and a motor 7 for controlling the rotation of the driving roller 6 is installed on the driving base 4;

[0034] The stay cable is clamped by the driving roller 6 and the pressure measuring roller shaft group 5, and the rotation of the driving roller 6 can drive the whole device to move along the stay cable.

[0035] Refer to Figure 4As shown in the figure, in this embodiment, the pressure measuring roller shaft group 5 includes a plurality of roller shafts 51. Chute openings 31 are provided at the positions of the roller shafts 51 on the two inner side walls of the pressure measuring base 3. The end shafts of the roller shafts 51 are movably inserted into the chute openings 31 at corresponding positions. The pressure sensors 8 are fixedly installed in the chute openings 31. Springs 9 are connected between the pressure sensors 8 and the end shafts of the roller shafts 51. When the roller shafts 51 pass through the stay cables with inconsistent flatness, the roller shafts 51 will move, thus affecting different pressures on the pressure sensors 8. According to the change value of the pressure, the flatness change of the stay cables can be feedbacked.

[0036] At the same time, bearings 52 are installed on the end shafts of the roller shafts 51.

[0037] In this embodiment, the motor 7 is fixedly installed on the top of the driving base 4. A first sprocket 71 is fixedly installed on the output shaft of the motor 7. A second sprocket 61 is fixedly installed on one end shaft of the driving roller 6. The second sprocket 61 and the first sprocket 71 are connected by a chain drive.

[0038] In this embodiment, the moving ring 1 is composed of a first semi-circular clamping plate 11 and a second semi-circular clamping plate 12. One end of the first semi-circular clamping plate 11 is movably hinged to one end of the second semi-circular clamping plate 12. The other end of the first semi-circular clamping plate 11 and the other end of the second semi-circular clamping plate 12 are fixedly connected by bolts.

[0039] In this embodiment, a rubber layer is provided on the surface of the driving roller 6 to increase the friction force.

[0040] In this embodiment, a wireless transceiver module and a storage battery are installed on the moving ring 1. The storage battery is used to supply power to the cable force tester 2. The wireless transceiver module is used for wireless data transmission between the cable force tester 2 and the pressure sensors 8 and external receiving devices, facilitating remote viewing by the staff.

[0041] The specific operation steps are as follows: Turn on the moving ring 1 and the cable force tester 2 and clamp them on the stay cable. Then, fix the first semi-circular clamping plate 11 and the second semi-circular clamping plate 12 of the moving ring 1 by bolts. At this time, the moving ring 1 can be stably sleeved on the stay cable.

[0042] The driving roller 6 can be driven to rotate by the motor 7. Since the pressure measuring roller shaft group 5 contacts the stay cable under the elastic force of the spring 9, the pressure measuring roller shaft group 5 and the driving roller 6 can stably clamp the stay cable. When the driving roller 6 rotates, the moving ring 1 and the cable force tester 2 can move on the stay cable, so as to monitor the cable force at different positions of the stay cable. At the same time, during the movement, the pressure measuring roller shaft group 5 can monitor the surface flatness of the stay cable in real time.

[0043] In the description of this specification, the description referring to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with that embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples within.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] Those skilled in the art should understand that the above embodiments are merely for clearly explaining the present disclosure and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A cable force monitoring device for a cable-stayed bridge without backstays, comprising a cable force tester, characterized in that: Also included are a moving ring, a pressure measuring base, and a driving base; The cable force tester is fixedly mounted at one end of the moving ring; The pressure measuring base and the driving base are respectively fixedly mounted on the inner side walls of the moving ring; The pressure measuring base and the driving base have openings on opposite sides, a pressure measuring roller group is rotatably installed in the opening of the pressure measuring base, and a pressure sensor for monitoring the pressure value of the pressure measuring roller group is provided in the pressure measuring base; A driving roller is rotatably mounted in the opening of the driving base, and a motor for controlling the rotation of the driving roller is mounted on the driving base.

2. The cable force monitoring device for a cable-stayed bridge without backstays according to claim 1, characterized in that: The pressure measuring roller group includes multiple rollers, and both inner walls of the pressure measuring base are provided with slide grooves at the roller positions. The end shafts of the rollers are movably inserted into the slide grooves at corresponding positions, and the pressure sensor is fixedly installed in the slide grooves. A spring is connected between the pressure sensor and the end shaft of the roller.

3. The cable force monitoring device for a cable-stayed bridge without backstays according to claim 1, characterized in that: The motor is fixedly mounted on the top of the driving base, a first sprocket is fixedly mounted on the output shaft of the motor, a second sprocket is fixedly mounted on one end shaft of the driving roller, and the second sprocket is connected to the first sprocket through a chain transmission.

4. The cable force monitoring device for a cable-stayed bridge without backstays according to claim 1, characterized in that: The movable ring is composed of a first semicircular clamping plate and a second semicircular clamping plate. One end of the first semicircular clamping plate is movably hinged with one end of the second semicircular clamping plate, and the other end of the first semicircular clamping plate is fixedly connected with the other end of the second semicircular clamping plate by bolts.

5. The cable force monitoring device for a cable-stayed bridge without backstays according to claim 1, characterized in that: The surface of the driving roller is provided with a rubber layer.

6. The cable force monitoring device for a cable-stayed bridge without backstays according to claim 1, characterized in that: A wireless transceiver module and a battery are installed on the mobile ring. The battery is used to power the cable tension tester, and the wireless transceiver module is used for wireless data transmission between the cable tension tester and the pressure sensor and an external receiving device.

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