Cable force monitoring and early warning device

Abstract

The utility model belongs to the technical field of bridge inhaul cable early warning, and discloses a cable force monitoring and early warning device which comprises an inhaul cable, a first upper clamping sleeve is attached to the outer side of the inhaul cable, a first lower clamping sleeve is attached to the bottom end of the first upper clamping sleeve, a second upper clamping sleeve is attached to the outer side of the inhaul cable, and a second lower clamping sleeve is attached to the bottom end of the second upper clamping sleeve. The outer side of the inhaul cable is sleeved with a magnetic flux sensor, the magnetic flux sensor is located between the first upper clamping sleeve and the second upper clamping sleeve and electrically connected with the data acquisition station, a steel strand penetrates through the interior of the first upper clamping sleeve, and the magnetic flux sensor detects the magnitude of cable force borne by the inhaul cable. A worker is early warned in real time according to the degree of cable force, when the stay cable is suddenly broken, the steel strand is used for stretching and connecting the two ends of the broken stay cable, so that the stay cable can continuously play an elastic supporting role on the main beam, and the problem that when the stay cable is suddenly broken and the structure is damaged, the bridge is effectively supported is solved; and the bridge collapse can be caused.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge cable early warning, in particular to a cable force monitoring and early warning device. Background Art

[0002] Parallel steel wire cables made of steel wires are widely used in bridges, buildings and other fields. For example, the cables in cable-stayed bridges play the role of elastic support for the main beam on the one hand, and greatly reduce the bending moment of the main beam on the other hand. However, major accidents such as sudden breakage of cables and structural damage have not been eliminated. Therefore, it is necessary to set up a cable tension warning device.

[0003] At the same time, the application number is 201320030919.6, "The utility model relates to the technical field of bridge engineering, and in particular to a static monitoring cable tension device; the static monitoring cable tension device of the utility model has a simple detection method, a relatively simple device, a low production cost, and can monitor the in-service cables; it includes a force measuring cable, an anchor, a tension device and a monitoring device, the tension device is installed on the bridge tower, the number of anchors matches the number of cables, the anchor is installed on the cable, a force measuring cable fixing lock is provided on the anchor, the force measuring cable passes through the force measuring cable fixing lock, and one end of the force measuring cable is fixed on the anchor of the outermost cable, and the other end is connected to the tension device, the monitoring device includes a controller, a pressure sensor and a displacement sensor, the pressure sensor is connected to the tension device, and senses the tension change on the force measuring cable, the displacement sensor senses the displacement change of the force measuring cable along the direction of the force measuring cable, and the controller receives and analyzes data, controls the tension device and the force measuring cable fixing lock.";

[0004] The existing cable tension warning device can only observe and warn but cannot respond to sudden emergencies. However, various emergencies encountered during use are very fatal, such as the breakage of the inclined cable. When the inclined cable breaks suddenly and the structure is damaged, it can no longer provide effective support for the bridge, which may cause the bridge to collapse.

[0005] Therefore, in view of the above problems, a cable force monitoring and early warning device is proposed. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a cable force monitoring and early warning device, which has the advantages of being able to elastically support the main beam and give timely warning when the inclined cable breaks.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cable force monitoring and early warning device, comprising a cable, the outer side of the cable is fitted with a first upper sleeve, the bottom end of the first upper sleeve is fitted with a first lower sleeve, the outer side of the cable is fitted with a second upper sleeve, the bottom end of the second upper sleeve is fitted with a second lower sleeve, the outer side of the cable is sleeved with a magnetic flux sensor, the magnetic flux sensor is located between the first upper sleeve and the second upper sleeve, the magnetic flux sensor is electrically connected to a data acquisition station, a steel strand is penetrated inside the first upper sleeve, one side of the steel strand is fixedly connected to a fixed block, and the other side of the steel strand is fixedly connected to an extrusion block.

[0008] Preferably, a square groove is provided on one side of the first upper ferrule, and a pressure sensor is embedded in the square groove.

[0009] Preferably, the number of the steel strands is four, which are arranged symmetrically about the central axis of the cable and pass through the first upper ferrule, the first lower ferrule, the second upper ferrule and the second lower ferrule respectively.

[0010] Preferably, a first sensor fixing ring is attached to one side of the magnetic flux sensor, and a second sensor fixing ring is attached to the other side of the magnetic flux sensor, and the first sensor fixing ring and the second sensor fixing ring are fixedly connected to the cable.

[0011] Preferably, grooves are provided inside the first upper ferrule and the first lower ferrule, and gaskets are fixedly connected inside the grooves.

[0012] Preferably, hexagonal bolts are respectively inserted into both sides of the first upper ferrule and the first lower ferrule, and the hexagonal bolts are spirally connected to the first upper ferrule and the first lower ferrule.

[0013] Preferably, a temperature sensor is embedded in the magnetic flux sensor, and a coil is embedded in the magnetic flux sensor.

[0014] Preferably, an optical sensor is fixedly connected to the top of the data collection station, and a solar panel is rotatably connected to the top of the data collection station.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model measures the change of the magnetic permeability of the cable through the magnetic flux sensor to obtain the size of the cable force on the cable, and issues real-time warning to the staff through the data acquisition station. When the cable breaks due to the huge tensile force, the steel strand will stretch and connect the two ends of the broken cable, so that the cable can continue to play the role of elastic support for the main beam, preventing the bridge from collapsing.

[0017] 2. The utility model displays the pressure size in the data acquisition station by squeezing the pressure sensor with the squeezing block, thereby indirectly reflecting the size of the cable force on the cable, and giving early warning to the staff so that corresponding measures can be taken in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the early warning module of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the card sleeve module of the utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the magnetic flux sensor of the utility model;

[0022] Figure 5 This is a schematic diagram of the module structure of the data acquisition station of the utility model.

[0023] In the figure: 1. cable; 2. first upper ferrule; 3. first lower ferrule; 4. second upper ferrule; 5. second lower ferrule; 6. magnetic flux sensor; 7. steel strand; 8. first sensor fixing ring; 9. second sensor fixing ring; 10. fixing block; 11. extrusion block; 12. pressure sensor; 13. hexagonal bolt; 14. temperature sensor; 15. coil; 16. groove; 17. gasket; 18. data acquisition station; 19. solar panel. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 5As shown, the utility model provides a cable force monitoring and early warning device, including a cable 1, a first upper sleeve 2 is fitted on the outer side of the cable 1, a first lower sleeve 3 is fitted on the bottom end of the first upper sleeve 2, a second upper sleeve 4 is fitted on the outer side of the cable 1, a second lower sleeve 5 is fitted on the bottom end of the second upper sleeve 4, a magnetic flux sensor 6 is sleeved on the outer side of the cable 1, the magnetic flux sensor 6 is in the middle of the first upper sleeve 2 and the second upper sleeve 4, the magnetic flux sensor 6 is electrically connected to the data acquisition station 18, a steel strand 7 is penetrated inside the first upper sleeve 2, a fixed block 10 is fixedly connected to one side of the steel strand 7, and an extrusion block 11 is fixedly connected to the other side of the steel strand 7, and the extrusion block 11 is not fitted with the first upper sleeve 2 and the first lower sleeve 3.

[0026] Specifically, a square groove is opened on one side of the first upper ferrule 2, and a pressure sensor 12 is embedded in the square groove, which can measure the tension exerted on the steel strand 7, thereby indirectly reflecting the size of the cable force exerted on the cable 1.

[0027] Furthermore, there are four steel strands 7 which are symmetrically arranged with respect to the central axis of the cable 1 and respectively pass through the first upper ferrule 2, the first lower ferrule 3, the second upper ferrule 4 and the second lower ferrule 5, which is conducive to connecting the two ends of the broken cable 1.

[0028] Furthermore, a first sensor fixing ring 8 is attached to one side of the magnetic flux sensor 6, and a second sensor fixing ring 9 is attached to the other side of the magnetic flux sensor 6. The first sensor fixing ring 8 and the second sensor fixing ring 9 are fixedly connected to the cable 1 to position the magnetic flux sensor 6 and prevent the magnetic flux sensor 6 from displacement.

[0029] It is worth noting that a groove 16 is provided inside the first upper ferrule 2 and the first lower ferrule 3, and a gasket 17 is fixedly connected inside the groove 16, which not only increases the contact area but also prevents damage to the cable 1 due to excessive pressure.

[0030] It is worth noting that hexagonal bolts 13 are inserted into both sides of the first upper ferrule 2 and the first lower ferrule 3, respectively. The hexagonal bolts 13 are spirally connected to the first upper ferrule 2 and the first lower ferrule 3 to make the connection more stable and prevent the ferrule from becoming loose due to the external environment.

[0031] It is worth mentioning that a temperature sensor 14 is embedded inside the magnetic flux sensor 6, and a coil 15 is embedded inside the magnetic flux sensor 6, which can detect the temperature in real time and reduce the influence of temperature on the cable force calculation.

[0032] It is worth emphasizing that an optical sensor is fixedly connected to the top of the data collection station 18, and a solar panel 19 is rotatably connected to the top of the data collection station 18, which can rotate with the angle of the sun to maximize the utilization of light and save costs.

[0033] Among them, the magnetic flux sensor 6, pressure sensor 12, temperature sensor 14 and data acquisition station 18 are existing technologies and will not be described in detail; at the same time, the utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail.

[0034] Working principle and process:

[0035] Before installing the cable 1, the staff installs the magnetic flux sensor 6 to the part of the cable 1 that is prone to breakage in advance, and uses the first sensor fixing ring 8 and the second sensor fixing ring 9 to fix the position of the magnetic flux sensor 6 to prevent movement, and then installs the data acquisition station 18 to the appropriate position at the junction of the bridge tower and the bridge deck. The solar panel 19 rotatably connected to the top of the data acquisition station 18 can also power it, reducing costs. After that, the installation of the cable 1 is completed. During the measurement, the magnetic flux sensor 6 measures the change in the internal stress of the cable 1 after being subjected to the load, causing the amount of change in the magnetic field inside the cable 1, and the data acquisition station 18 is used to measure the cable The cable force on the cable 1 is monitored in real time, and the staff is warned in real time. After the cable 1 is stretched to a certain length, the extrusion block 11 fits and squeezes the pressure sensor 12. At this time, the four steel strands 7 will be straightened and share the cable force of the cable 1. The pressure sensor 12 will warn the staff to prevent the subsequent excessive tension from causing the cable 1 to break. If it breaks, the first upper ferrule 2 and the first lower ferrule 3 will hold the broken end, and the second upper ferrule 4 and the second lower ferrule 5 will hold the other broken end, so that the steel strand 7 connects the broken ends of the cable 1 together and continues to play the role of elastic support for the main beam to prevent the bridge from collapsing.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable force monitoring and early warning device, comprising a cable (1), characterized in that: The outer side of the cable (1) is fitted with a first upper sleeve (2), the bottom end of the first upper sleeve (2) is fitted with a first lower sleeve (3), the outer side of the cable (1) is fitted with a second upper sleeve (4), the bottom end of the second upper sleeve (4) is fitted with a second lower sleeve (5), the outer side of the cable (1) is sleeved with a magnetic flux sensor (6), the magnetic flux sensor (6) is between the first upper sleeve (2) and the second upper sleeve (4), the magnetic flux sensor (6) is electrically connected to a data acquisition station (18), a steel strand (7) is penetrated inside the first upper sleeve (2), one side of the steel strand (7) is fixedly connected to a fixed block (10), and the other side of the steel strand (7) is fixedly connected to an extrusion block (11).

2. A cable force monitoring and early warning device according to claim 1, characterized in that: A square groove is provided on one side of the first upper ferrule (2), and a pressure sensor (12) is embedded in the interior of the square groove.

3. A cable force monitoring and early warning device according to claim 1, characterized in that: The number of the steel strands (7) is four, which are symmetrically arranged about the central axis of the cable (1) and respectively penetrate the first upper ferrule (2), the first lower ferrule (3), the second upper ferrule (4) and the second lower ferrule (5).

4. A cable force monitoring and early warning device according to claim 1, characterized in that: A first sensor fixing ring (8) is fitted on one side of the magnetic flux sensor (6), and a second sensor fixing ring (9) is fitted on the other side of the magnetic flux sensor (6). The first sensor fixing ring (8) and the second sensor fixing ring (9) are fixedly connected to the cable (1).

5. The cable force monitoring and early warning device according to claim 1, characterized in that: A groove (16) is provided inside the first upper clamping sleeve (2) and the first lower clamping sleeve (3), and a gasket (17) is fixedly connected inside the groove (16).

6. The cable force monitoring and early warning device according to claim 1, characterized in that: Hexagonal bolts (13) are respectively inserted into the two sides of the first upper clamping sleeve (2) and the first lower clamping sleeve (3), and the hexagonal bolts (13) are spirally connected to the first upper clamping sleeve (2) and the first lower clamping sleeve (3).

7. The cable force monitoring and early warning device according to claim 1, characterized in that: A temperature sensor (14) is embedded inside the magnetic flux sensor (6), and a coil (15) is embedded inside the magnetic flux sensor (6).

8. The cable force monitoring and early warning device according to claim 1, characterized in that: The top of the data collection station (18) is fixedly connected to an optical sensor, and the top of the data collection station (18) is rotatably connected to a solar panel (19).

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