A prestressed steel cable tension dynamic monitoring device

Abstract

This utility model discloses a dynamic monitoring device for the tension of prestressed steel cables, relating to the field of steel cable monitoring technology. It includes a fixed plate with a monitoring mechanism mounted on one side. The monitoring mechanism includes a support frame, the bottom of which is fixedly connected to one side of the fixed plate. In this utility model, the steel cable passes through the outside of the monitoring roller. The tension of the steel cable causes the monitoring roller to move upwards. A resistance strain gauge contacts the inner side of the moving frame, generating pressure to measure the tension of the steel cable. Simultaneously, the moving frame moves upwards with the movement of the mounting frame, compressing and deforming a second spring. This causes the moving pointer to move, pointing to different values ​​on the fixed plate, indicating the tension of the steel cable. The electrical signal measurement of the resistance strain gauge and the deformation scale of the second spring complement each other. The electrical signal can be calibrated on-site by reading the deformation scale value, avoiding measurement distortion caused by the failure of a single sensor.

Description

Technical Field

[0001] This utility model relates to the field of steel cable monitoring technology, and in particular to a dynamic monitoring device for the tension of prestressed steel cables. Background Technology

[0002] Prestressed steel cables are widely used in bridges (such as stay cables), high-rise buildings (such as anchor cables), geotechnical engineering (such as slope anchoring), and other scenarios. Their tension state is directly related to structural safety, and monitoring devices are needed to monitor the tension of the steel cables.

[0003] For example, CN205352599U discloses a real-time dynamic monitoring device for steel cable tension, which includes a main body with rollers installed on it. The rollers include a front support roller, an intermediate pressure roller, and a rear support roller installed in parallel from front to back. A pressure roller support is installed on the main body, with one side hinged to a mounting base set on the main body. The intermediate pressure roller is installed in the pressure roller support through a pin sensor.

[0004] In existing technologies, steel cables are subjected to dynamic loads such as vehicle vibration, wind load, and temperature changes during service, and the tension fluctuates periodically. Static measurements cannot capture real-time changes, and when dynamic monitoring is carried out to track the trend of tension fluctuations in real time, it often relies on a single electrical signal sensor. Once the sensor is damp, subject to electromagnetic interference, or aging of components, data jumps or zero-point drift are likely to occur, affecting monitoring. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing technologies rely heavily on a single electrical signal sensor when dynamically monitoring and tracking the trend of tension fluctuations, which is prone to data jumps or zero-point drift. Therefore, this invention proposes a dynamic monitoring device for the tension of prestressed steel cables.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dynamic monitoring device for the tension of prestressed steel cables, comprising a fixed plate, a monitoring mechanism installed on one side of the fixed plate, the monitoring mechanism comprising a support frame, the bottom side of the support frame being fixedly connected to one side of the fixed plate, guide mechanisms being provided on both sides of the support frame, a moving rod being slidably connected to the top side of the support frame, a moving frame being fixedly connected to the bottom end of the moving rod, a second spring being sleeved on the outside of the moving rod, the second spring being disposed between the moving frame and the support frame, an installation frame being slidably connected to the inside of the moving frame, a resistance strain gauge being fixedly connected to the top side of the installation frame, one end of the resistance strain gauge overlapping the inside of the moving frame, and a monitoring roller being rotatably connected to the inside of the installation frame.

[0007] Preferably, a moving pointer is fixedly connected to the top of the moving rod, and numerical lines are provided on the side of the support frame.

[0008] Preferably, a guide groove is provided on one side of the support frame, and a guide rod is slidably connected to the inner side of the guide groove. One end of the guide rod is fixedly connected to one end of the mounting frame.

[0009] Preferably, the guiding mechanism includes a fixed frame, the bottom end of which is fixedly connected to one side of a fixed plate, a second guiding component is fixedly connected inside the fixed frame, a first guiding component is disposed above the second guiding component, and the outer side of the first guiding component is slidably connected to the inner side of the fixed frame.

[0010] Preferably, the second guide assembly includes a connecting block, a conveying roller, and a positioning rod. One end of the connecting block is fixedly connected to one end of the positioning rod, and the outside of the positioning rod is rotatably connected to the middle of the conveying roller. The second guide assembly has the same structure as the first guide assembly.

[0011] Preferably, a baffle is rotatably connected to one side of the first guide assembly, and one end of the baffle overlaps one side of the second guide assembly.

[0012] Preferably, a movable block is slidably connected to the inner side of the fixed frame, a first spring is installed between the movable block and the first guide component, and a threaded rod is rotatably connected to the top of the movable block, with the outer side of the threaded rod threadedly connected to the top of the fixed frame.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, a steel cable passes through the outside of the monitoring roller. The tension of the steel cable drives the monitoring roller to move upward. The resistance strain gauge contacts the inside of the moving frame to generate pressure, measuring the tension of the steel cable. At the same time, the moving frame moves upward with the movement of the mounting frame, the second spring is compressed and deformed, and the moving pointer moves to point to different values ​​on the fixed plate, indicating the tension of the steel cable. The electrical signal measurement of the resistance strain gauge and the deformation scale of the second spring complement each other. The electrical signal can be calibrated on-site by reading the deformation scale value, avoiding measurement distortion caused by the failure of a single sensor.

[0015] 2. In this utility model, the baffle is rotated to one side, the baffle is separated from the second guide component, the steel cable is placed between the first guide component and the second guide component, the threaded rod is rotated, the moving block is driven to move, the distance between the first guide component and the second guide component is adjusted, and different steel cables are guided and driven. Attached Figure Description

[0016] Figure 1 This utility model provides a first three-dimensional structural schematic diagram of a dynamic monitoring device for the tension of prestressed steel cables;

[0017] Figure 2 This utility model provides a second three-dimensional structural schematic diagram of a dynamic monitoring device for the tension of prestressed steel cables;

[0018] Figure 3 This utility model provides a schematic diagram of the disassembly structure of the monitoring mechanism of a dynamic monitoring device for the tension of prestressed steel cables;

[0019] Figure 4 This utility model presents a schematic diagram of the guide mechanism connection structure of a dynamic monitoring device for the tension of prestressed steel cables.

[0020] Legend: 1. Fixed plate; 2. Guide mechanism; 21. Fixed frame; 22. First guide assembly; 23. Second guide assembly; 231. Connecting block; 232. Conveying roller; 233. Positioning rod; 24. First spring; 25. Baffle; 26. Moving block; 27. Threaded rod; 3. Monitoring mechanism; 31. Support frame; 32. Guide groove; 33. Guide rod; 34. Monitoring roller; 35. Mounting frame; 36. Resistance strain gauge; 37. Moving frame; 38. Second spring; 39. Moving rod; 310. Pointer. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides a dynamic monitoring device for the tension of prestressed steel cables, including a fixed plate 1. A monitoring mechanism 3 is installed on one side of the fixed plate 1. The monitoring mechanism 3 includes a support frame 31. The bottom side of the support frame 31 is fixedly connected to one side of the fixed plate 1. Guide mechanisms 2 are provided on both sides of the support frame 31. A moving rod 39 is slidably connected to the top side of the support frame 31. A moving frame 37 is fixedly connected to the bottom end of the moving rod 39. A second spring 38 is sleeved on the outside of the moving rod 39. The second spring 38 is disposed between the moving frame 37 and the support frame 3. Between 1, a mounting frame 35 is slidably connected to the inner side of the movable frame 37, a resistance strain gauge 36 is fixedly connected to the top side of the mounting frame 35, one end of the resistance strain gauge 36 overlaps with the inner side of the movable frame 37, and a monitoring roller 34 is rotatably connected to the inner side of the mounting frame 35; a pointer 310 is fixedly connected to the top of the movable rod 39, and a numerical line is provided on the side of the support frame 31; a guide groove 32 is opened on one side of the support frame 31, a guide rod 33 is slidably connected to the inner side of the guide groove 32, and one end of the guide rod 33 is fixedly connected to one end of the mounting frame 35.

[0024] The steel cable passes through the outside of the monitoring roller 34. The tension of the steel cable can drive the monitoring roller 34 to move upward. The guide rod 33 slides outside the guide groove 32. The fixed mounting frame 35 moves linearly. The resistance strain gauge 36 on the top side of the mounting frame 35 contacts the inner side of the moving frame 37 to generate pressure, which can measure the tension of the steel cable. At the same time, the moving frame 37 moves upward with the movement of the mounting frame 35. The second spring 38 is compressed and deformed. The moving rod 39 slides on the support frame 31. The fixed moving frame 37 moves linearly, and the pointer 310 moves, pointing to different values ​​on the fixed plate 1, thereby indicating the tension of the steel cable.

[0025] Example 2: Figure 1 and Figure 4 As shown, the guide mechanism 2 includes a fixed frame 21, the bottom end of which is fixedly connected to one side of the fixed plate 1. A second guide component 23 is fixedly connected inside the fixed frame 21. A first guide component 22 is disposed above the second guide component 23. The outer side of the first guide component 22 is slidably connected to the inner side of the fixed frame 21. The second guide component 23 includes a connecting block 231, a conveying roller 232, and a positioning rod 233. One end of the connecting block 231 is fixedly connected to one end of the positioning rod 233. The outer side of the positioning rod 233 is rotatably connected to the middle of the conveying roller 232. The second guide component 23 has the same structure as the first guide component 22. A baffle 25 is rotatably connected to one side of the first guide component 22. One end of the baffle 25 overlaps one side of the second guide component 23. A moving block 26 is slidably connected to the inner side of the fixed frame 21. A first spring 24 is installed between the moving block 26 and the first guide component 22. A threaded rod 27 is rotatably connected to the top of the moving block 26. The outer side of the threaded rod 27 is threadedly connected to the top of the fixed frame 21.

[0026] First, the baffle 25 is flipped to one side, and one end of the baffle 25 rotates on the first guide assembly 22, separating the baffle 25 from the second guide assembly 23. The steel cable is placed between the first guide assembly 22 and the second guide assembly 23. The outside of the conveying roller 232 is provided with a groove to facilitate the positioning of the steel cable. The baffle 25 rotates to a vertical position under the action of gravity to prevent the steel cable from falling off during movement. The threaded rod 27 is rotated, and the threaded rod 27 moves at the top of the fixed frame 21, driving the moving block 26 to move. The moving block 26 slides inside the fixed frame 21, driving the first guide assembly 22 to move inside the fixed frame 21. The distance between the first guide assembly 22 and the second guide assembly 23 can be adjusted to guide and drive different steel cables. At the same time, the elastic force of the first spring 24 can reduce the swaying of the steel cable during movement.

[0027] The method of use and working principle of this device: Rotate the baffle 25 to separate it from the second guide component 23, place the steel cable between the first guide component 22 and the second guide component 23, rotate the threaded rod 27 to drive the moving block 26 to move, adjust the distance between the first guide component 22 and the second guide component 23 to guide the steel cable, the steel cable passes through the outside of the monitoring roller 34, the tension of the steel cable can drive the monitoring roller 34 to move upward, the resistance strain gauge 36 contacts the inside of the moving frame 37 to generate pressure, and measure the tension of the steel cable. At the same time, the moving frame 37 moves upward with the movement of the mounting frame 35, the second spring 38 is compressed and deformed, the moving pointer 310 moves and points to different values ​​on the fixed plate 1, thereby indicating the tension of the steel cable.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A dynamic monitoring device for the tension of prestressed steel cables, comprising a fixing plate (1), characterized in that: A monitoring mechanism (3) is installed on one side of the fixed plate (1). The monitoring mechanism (3) includes a support frame (31). The bottom side of the support frame (31) is fixedly connected to one side of the fixed plate (1). Guide mechanisms (2) are provided on both sides of the support frame (31). A moving rod (39) is slidably connected to the top side of the support frame (31). A moving frame (37) is fixedly connected to the bottom end of the moving rod (39). A second spring (38) is sleeved on the outside of the moving rod (39). The second spring (38) is set between the moving frame (37) and the support frame (31). A mounting frame (35) is slidably connected to the inside of the moving frame (37). A resistance strain gauge (36) is fixedly connected to the top side of the mounting frame (35). One end of the resistance strain gauge (36) overlaps with the inside of the moving frame (37). A monitoring roller (34) is rotatably connected to the inside of the mounting frame (35).

2. The prestressed steel cable tension dynamic monitoring device according to claim 1, characterized in that: The top of the moving rod (39) is fixedly connected to a moving pointer (310), and a numerical line is provided on the side of the support frame (31).

3. The prestressed steel cable tension dynamic monitoring device according to claim 1, characterized in that: A guide groove (32) is provided on one side of the support frame (31), and a guide rod (33) is slidably connected to the inner side of the guide groove (32). One end of the guide rod (33) is fixedly connected to one end of the mounting frame (35).

4. The prestressed steel cable tension dynamic monitoring device according to claim 1, characterized in that: The guide mechanism (2) includes a fixed frame (21), the bottom end of the fixed frame (21) is fixedly connected to one side of the fixed plate (1), a second guide component (23) is fixedly connected inside the fixed frame (21), a first guide component (22) is provided above the second guide component (23), and the outer side of the first guide component (22) is slidably connected to the inner side of the fixed frame (21).

5. The prestressed steel cable tension dynamic monitoring device according to claim 4, characterized in that: The second guide assembly (23) includes a connecting block (231), a conveying roller (232) and a positioning rod (233). One end of the connecting block (231) is fixedly connected to one end of the positioning rod (233), and the outside of the positioning rod (233) is rotatably connected to the middle of the conveying roller (232). The second guide assembly (23) has the same structure as the first guide assembly (22).

6. The prestressed steel cable tension dynamic monitoring device according to claim 4, characterized in that: A baffle (25) is rotatably connected to one side of the first guide assembly (22), and one end of the baffle (25) overlaps one side of the second guide assembly (23).

7. The prestressed steel cable tension dynamic monitoring device according to claim 4, characterized in that: The inner side of the fixed frame (21) is slidably connected to a movable block (26), and a first spring (24) is installed between the movable block (26) and the first guide assembly (22). The top of the movable block (26) is rotatably connected to a threaded rod (27), and the outside of the threaded rod (27) is threadedly connected to the top of the fixed frame (21).

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