Stay wire tension measuring device of ultra-high voltage power transmission line

Abstract

A stay wire tension measuring device for an ultra-high voltage power transmission line comprises a tension tester body, mounting mechanisms are mounted at the left end and the right end of the tension tester body, and a tension tester and a detection mechanism are mounted on one side, between the two mounting mechanisms, of the tension tester body; the detection mechanism comprises a control mechanism, the control mechanism comprises a guide plate, a plurality of test plates are arranged on the outer end surface of the guide plate, one end of each test plate is rotatably connected with the guide plate through a fixed rotating shaft, and the back surface of each test plate is connected with the guide plate through a spring; and a pressure sensor is arranged between the test plate and the spring. The stay wire tension measuring device of the ultra-high voltage power transmission line provided by the utility model can improve the accuracy of measured data.

Description

Technical Field

[0001] This utility model relates to the field of tension measuring devices, and in particular to a tension measuring device for guy wires in ultra-high voltage transmission lines. Background Technology

[0002] The tension measuring device for UHV transmission lines is a tension gauge, which is an instrument used to measure tension. It is commonly used in fields such as power, construction, and machinery. In UHV transmission lines, the tension measuring device can be used to measure the tension of the guy wires to ensure the stability and safety of the line.

[0003] Existing wire tension testing devices, such as the portable digital display guy wire tension measuring device (CN 115200763 A), include a fixed frame and clamping devices connected to both ends of the fixed frame. A spring-loaded measuring device is connected to the fixed frame. The clamping devices are used to clamp and fix the fixed frame to the guy wire to be tested; the spring-loaded measuring device is used to strike the clamped guy wire and measure its tension. This invention's device and method, based on the spring-loaded method, has good waterproof and stain-resistant properties. While ensuring high accuracy, it significantly improves stability compared to traditional guy wire tension measuring equipment, enabling it to maintain measurement stability even under harsh environmental conditions.

[0004] The aforementioned utility model not only allows for quick connection and testing of the measuring device and wires during use, but also provides data results relatively quickly. However, the data fluctuates significantly, and the measured data is affected by wind and vibration during testing, leading to errors and resulting in low accuracy of the measured data. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tension measuring device for ultra-high voltage transmission lines, which can improve the accuracy of the measured data.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A tension measuring device for a high-voltage transmission line includes a tension tester body, with mounting mechanisms installed at both ends of the tension tester body, and a tension tester and a detection mechanism installed on one side of the tension tester body located between the two mounting mechanisms;

[0008] The detection mechanism includes a control mechanism, which includes a guide plate. Multiple test plates are arranged on the outer end face of the guide plate. One end of each test plate is rotatably connected to the guide plate via a fixed rotating shaft, and the back of each test plate is connected to the guide plate via a spring. A pressure sensor is provided between the test plate and the spring.

[0009] The guide plate is rotatably connected to and locked to the upper end of the connecting shaft, and the lower end of the connecting shaft is fixedly connected to the main body of the tension tester.

[0010] The installation mechanism includes a first clamping plate, which is hinged to a second clamping plate. A first half-screw is fixed to the end of the first clamping plate away from the hinge point, and a second half-screw is fixed to the end of the second clamping plate away from the hinge point. After the first clamping plate and the second clamping plate are closed, the first half-screw and the second half-screw are combined to form a complete screw. A connecting screw sleeve is screwed into the screw and locked.

[0011] When the first and second plates are closed, a through hole is formed for the pull wire to pass through.

[0012] Multiple wire reels are mounted on the main body of the tension tester between the two mounting mechanisms, and each wire reel has a groove on its side wall for guiding the wire.

[0013] The guide coils are in three sets.

[0014] The guide plate is V-shaped, with its tip pointing towards the windward direction.

[0015] This utility model provides a tension measuring device for guy wires in ultra-high voltage transmission lines, which has the following technical advantages:

[0016] 1) By setting up the testing agency, more accurate data can be calculated based on wind data in the environment and test results. Compared with the results of existing technologies that rely solely on test data, the results calculated based on wind data and measurement data in this invention are more accurate and can provide more accurate tension data for the tension wire.

[0017] 2) The installation mechanism allows for quick and stable installation of the wire to be measured and the testing device, preventing inaccurate data due to gaps between the wire and the testing device when the wire vibrates. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the control mechanism in this utility model.

[0021] Figure 3 This is a schematic diagram of the installation mechanism in this utility model.

[0022] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0023] In the diagram: tension tester body 1, control mechanism 2, mounting mechanism 3, tensile tester 11, guide wire reel 12, connecting shaft 21, guide plate 22, fixed shaft 23, spring 24, test plate 25, first clamping plate 26, supporting shaft 27, second clamping plate 28, first half screw 29, second half screw 30, connecting screw sleeve 31, rotating handle 32, limiting rope 33, limiting clamping sleeve 34. Detailed Implementation

[0024] like Figure 1 As shown, a tension measuring device for guy wires in an ultra-high voltage transmission line includes a tension tester body 1. A tension tester 11 is mounted on the outer wall of the tension tester body 1, and a conductor reel 12 is rotatably connected to the top of the tension tester body 1. Mounting mechanisms 3 are provided on both sides of the tension tester body 1, and the mounting mechanisms 3 are used to clamp the guy wires. A detection mechanism is provided at the top of the outer wall of the tension tester body 1.

[0025] Multiple guide rails 12 (preferably three sets) are arranged between the two mounting mechanisms 3 of the tension tester body 1. Each guide rail 12 has a groove on its side wall for guiding the tension wire. The function of the guide rails 12 is to ensure that the tension wire maintains a stable path during measurement, avoiding measurement errors caused by wire deviation or slippage. At the same time, the guide rails can disperse the friction between the tension wire and the device, reducing the influence of external interference on the tension data, thereby improving the repeatability and accuracy of the measurement.

[0026] like Figure 2 As shown, the testing mechanism includes a control mechanism 2, which is mounted on the outer wall of the tension tester body 1. The control mechanism 2 includes a connecting shaft 21, the lower end of which is fixedly connected to the tension tester body 1, and the upper end of which is rotatably connected to a guide plate 22. Threaded holes are radially formed on the guide plate 22 and the connecting shaft 21; screws can be screwed in to lock the direction of the guide plate 22. After the screws are unscrewed, the guide plate 22 can rotate.

[0027] The guide plate 22 is V-shaped, and the two plates of the guide plate 22 form a certain angle. Multiple test plates 25 are arranged on the outer end face of each plate. One end of each test plate 25 is rotatably connected to the guide plate 22 via a fixed pivot 23. Multiple sets of springs 24 are connected to the back of each test plate 25, and the other ends of the springs 24 are connected to the guide plate 22. A certain angle exists between the connected test plate 25 and the guide plate 22.

[0028] The advantage of setting up multiple test boards 25 is that they can synchronously collect stress data of different areas of the guy wire through a distributed layout, eliminate single-point measurement errors by calculating the average of multiple sets of data, dynamically correct wind interference by combining the directional sensing capability of the V-shaped guide plate 22, and improve the system's fault tolerance through redundant design. Even if a local test board fails, the data reliability can still be guaranteed. Ultimately, this achieves high-precision and anti-interference measurement of guy wire tension in UHV transmission lines under complex wind-vibration environments, providing stable and comprehensive mechanical analysis support for high-altitude operations.

[0029] A detection element is disposed between the test plate 25 and the spring 24. The detection element is connected to the control mechanism 2 at the bottom via a wire. The detection element (e.g., a miniature pressure sensor or strain gauge of model HX711) is installed between the test plate 25 and the spring 24, and is connected to the signal processing module inside the control mechanism 2 via a wire. Specifically, the detection element is fixed at the contact point between the back of the test plate 25 and the spring 24 to monitor the deformation of the spring in real time and transmit the electrical signal to the central processing unit of the control mechanism (integrated in the tension tester body 1), which converts the deformation into tensile force data through a preset algorithm.

[0030] The detection element records the changes in spring 24 during testing. The control mechanism 2 includes mechanical components (guide plate 22, test plate 25, etc.) and electronic modules (signal processing unit, data processor). The tension signal collected by the detection element is transmitted to the electronic module via wires. Combined with the real-time data from the tensile tester 11, it is comprehensively calculated using the formula F = kΔx + C·θ (where k is the spring constant, Δx is the deformation, C is the angle correction coefficient, and θ is the test plate deflection angle). The corrected tension value is then output and the result is fed back via a display screen or wireless module. The control mechanism 2 then transmits data to comprehensively calculate the tension data of spring 24 and the test result data, yielding more accurate data.

[0031] like Figures 3-4 As shown, the mounting mechanism 3 includes a first clamping plate 26, which is fixed to the end of the tension tester body 1. A second clamping plate 28 is rotatably mounted on each first clamping plate 26 via a support shaft 27. When the second clamping plate 28 and the first clamping plate 26 are closed, they form a clamping ring for the tension wire. A first half-screw 29 is fixedly connected to the end of each first clamping plate 26 away from the support shaft 27, and a second half-screw 30 is fixedly connected to the end of each second clamping plate 28 away from the support shaft 27. After the second clamping plate 28 and the first clamping plate 26 are closed, the first half-screw 29 and the second half-screw 30 are aligned and joined together to form a complete external thread. The connecting thread sleeve 31 is connected to the complete screw thread formed by the first half-screw 29 and the second half-screw 30.

[0032] A rotating handle 32 is fixedly connected to the top of the connecting sleeve 31. The design of the rotating handle 32 significantly reduces the torque required to tighten the connecting sleeve 31 by increasing the torque radius, allowing the operator to complete the installation quickly with one hand, which is especially suitable for high-altitude operations. Its symmetrical structure ensures that the tightening force is evenly distributed, avoiding thread misalignment or jamming and improving clamping stability. At the same time, the handle is suitable for complex environments such as strong winds and low temperatures. Combined with the anti-slip texture and the limit rope 33 design, it is not only convenient to operate while wearing gloves, but also prevents the sleeve from falling off. Combined with ergonomic optimization, it reduces hand fatigue and comprehensively ensures the efficiency and safety of field inspection of UHV transmission lines.

[0033] A limiting ring is formed in the middle of the outer side wall of the connecting screw sleeve 31. A limiting sleeve 34 is rotatably connected to the limiting ring. A limiting rope 33 is fixedly connected to the limiting sleeve 34, and the other end of the limiting rope 33 is fixed to the top of the first clamping plate 26. The limiting sleeve 34 and the limiting rope 33 can limit the connecting screw sleeve 31 and prevent it from falling off or being lost when it is not in use.

[0034] Working principle and process:

[0035] 1) When measuring data of the transmission line, firstly, place the pull wire between the tension tester body 1 and the conductor reel 12. Then, place both ends of the pull wire into the corresponding first clamping plates 26. Next, rotate the second clamping plate 28 so that it rotates around the support shaft 27 and closes with the first clamping plate 26, limiting the pull wire. After the first clamping plate 26 and the second clamping plate 28 are closed, the complete screw formed by the first half-screw 29 and the second half-screw 30 is tightened with the connecting screw sleeve 31 to achieve rigid clamping of the pull wire. After locking, the pull wire remains taut between the mounting mechanisms 3, ensuring no relative slippage during measurement and avoiding data fluctuations due to vibration.

[0036] The tensile tester 11 uses a resistance strain gauge sensor (refer to patent CN202410327367.8), the core of which is a strain gauge attached to an elastic body. When the tension of the tension wire is applied to the sensor, the elastic body deforms, and the resistance value of the strain gauge changes accordingly. This change is converted into a voltage signal through a Wheatstone bridge circuit, and after amplification and analog-to-digital conversion, the tension value is output.

[0037] 2) When the wind is strong, it will exert a force on the guide plate 22. Based on the shape of the guide plate 22, its pointed end can be rotated to face the wind. The guide plate 22 is rotatably connected to the tension tester body 1 via the connecting shaft 21. During adjustment, loosen the locking screw on the connecting shaft 21, manually adjust the pointed end of the guide plate 22 to face the wind, and then tighten the screw again to ensure the guide plate remains fixed during measurement, preventing angle shift due to wind changes. The wind exerts a force on the outer side of the guide plate 22, causing the test plate 25 to rotate around the fixed shaft 23. When the test plate 25 rotates, it pulls on the spring 24, causing it to extend. The detection element then calculates the tension between the spring 24 and the test plate 25, and calculates the spring force of the spring 24 using the formula F=-kΔx. Combining the tension between the spring 24 and the test plate 25, the spring force of the spring 24, and the deflection angle of the test plate, the tension of the wire is determined. The determination process is as follows: the tension tester 11 directly measures the tension of the tension wire F1; the detection element obtains the spring deformation Δx, and calculates the wind vibration additional force F2 = kΔx + C·θ in combination with the spring coefficient k; the angle sensor obtains the deflection angle θ of the test plate, and finally the tension value F = F1 + F2·cosθ, eliminating wind and vibration interference, and outputting the corrected tension wire result.

Claims

1. A stay tension measuring device for an extra high voltage power transmission line, characterized by: Includes a tension tester body (1), with mounting mechanisms (3) installed at both ends of the tension tester body (1), and a tensile tester (11) and a testing mechanism installed on one side of the tension tester body (1) between the two mounting mechanisms (3); The detection mechanism includes a control mechanism (2), which includes a guide plate (22). Multiple test plates (25) are arranged on the outer end face of the guide plate (22). One end of each test plate (25) is rotatably connected to the guide plate (22) through a fixed rotating shaft (23). The back of each test plate (25) is connected to the guide plate (22) through a spring (24). A pressure sensor is provided between the test plate (25) and the spring (24).

2. A guy tension measuring device for an EHV power transmission line as claimed in claim 1, wherein: The guide plate (22) is rotatably connected to and locked at the upper end of the connecting shaft (21), and the lower end of the connecting shaft (21) is fixedly connected to the tension tester body (1).

3. A guy wire tension measuring device for an EHV power transmission line according to claim 2, characterized in that: The installation mechanism (3) includes a first clamping plate (26), which is hinged to a second clamping plate (28). A first half screw (29) is fixed at the end of the first clamping plate (26) away from the hinge point, and a second half screw (30) is fixed at the end of the second clamping plate (28) away from the hinge point. After the first clamping plate (26) and the second clamping plate (28) are closed, the first half screw (29) and the second half screw (30) are joined together to form a complete screw. The connecting screw sleeve (31) is screwed into the screw and locked.

4. A guy wire tension measuring device for an EHV power transmission line according to claim 3, characterized in that: After the first card plate (26) and the second card plate (28) are closed, a through hole is formed for the pull wire to pass through.

5. The tension measuring device for a UHV transmission line according to claim 4, characterized in that: Multiple wire reels (12) are installed on the tension tester body (1) between the two installation mechanisms (3), and each wire reel (12) has a groove on its side wall for guiding the wire.

6. A guy wire tension measuring device for an EHV power transmission line according to claim 5, characterized in that: The conductor reel (12) consists of three sets.

7. A guy wire tension measuring device for an EHV power transmission line according to claim 6, characterized in that: The guide plate (22) is V-shaped, with the tip of the guide plate (22) facing the windward direction.

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