Tension measuring device for high-voltage transmission line

Abstract

A high-voltage transmission line tension measuring device comprises a base station, a conversion assembly is installed on the base station, and a clamping assembly is installed on the conversion assembly; the conversion assembly comprises two groups of conversion tables which are driven by a driving mechanism to synchronously rotate or independently rotate; the clamping assembly is arranged at the vertical through holes of the first transfer table and the second transfer table and comprises limiting plates, the limiting plates are arranged in a left-right spaced mode, adjusting rods are installed on the opposite faces of the two limiting plates, arc-shaped plates are installed at the ends of the adjusting rods, and fiber grating sensors are installed on the inner side faces of the left arc-shaped plate and the right arc-shaped plate; when the left and right arc-shaped plates clamp the power transmission line, the fiber grating sensor measures the tension of the power transmission line. The tension measuring device for the high-voltage transmission line provided by the utility model can realize tension measurement of the transmission line in various states.

Description

Technical Field

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

[0002] In high-voltage power transmission systems, accurate measurement of transmission line tension is crucial, as it affects not only the safety and stability of the line but also transmission efficiency and equipment lifespan.

[0003] The applicant discovered through a search that a Chinese patent, "A High-Voltage Transmission Line Tension Measuring Device," with publication number "CN109406033A," is disclosed. This patent mainly uses a pressure sensor to measure the tension of high-voltage transmission lines. However, most traditional tension measuring devices can only measure the tension in a single direction of the transmission line, lacking versatility. Furthermore, this patent often struggles to accurately capture changes in lateral and vertical tension, making it impossible to comprehensively and accurately reflect the true stress state of the transmission line under complex actual working conditions, thus increasing the cost of use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high-voltage transmission line tension measuring device that can realize tension measurement of transmission lines in various states and has versatility.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A high-voltage transmission line tension measuring device includes a base, a conversion component mounted on the base, and a clamping component mounted on the conversion component;

[0007] The conversion assembly includes a conversion platform one and a conversion platform two. Both conversion platforms one and two are provided with horizontal and vertical through holes for the transmission lines to pass through. The conversion platforms one and two are driven to rotate synchronously or independently by a drive mechanism on the outside of the base.

[0008] The clamping assembly is installed at the vertical through holes of the first and second conversion platforms. The clamping assembly includes limiting plates, which are arranged at intervals on the left and right. An adjusting rod is installed on the opposite side of each limiting plate, and an arc plate is installed at the end of the adjusting rod. Fiber Bragg grating sensors are installed on the inner sides of the left and right arc plates. When the left and right arc plates clamp the transmission line, the fiber Bragg grating sensors measure the tension of the transmission line.

[0009] The driving mechanism includes a first rotating shaft and a second rotating shaft. The first rotating shaft is connected to a first conversion platform, and the second rotating shaft is connected to a second conversion platform. Both the first and second rotating shafts can be rotatably mounted on the base, and the first and second rotating shafts are connected by a belt conveyor mechanism. The first rotating shaft is driven by a conversion motor, which is mounted on the outside of the base.

[0010] A second electromagnetic clutch is installed on the first rotating shaft, and a first electromagnetic clutch is installed on the second rotating shaft.

[0011] The base is U-shaped, and the horizontal part of the base is provided with three through holes for the power transmission lines to pass through.

[0012] A fastening assembly is installed on the upper part of the base. The fastening assembly includes a cover plate with a fixing ring at the bottom. A fixing groove is provided on the top surface of the corresponding base, and the fixing groove and the fixing ring are engaged with each other.

[0013] The outer side of the fixing ring is connected to the inclined plate by a spring, and the inclined plate is engaged with the through hole on the base.

[0014] The adjusting rod includes a telescopic rod, which is formed by a threaded sleeve and a threaded rod connected by threads, and a spring is wrapped around the telescopic rod.

[0015] This utility model provides a high-voltage transmission line tension measuring device, which has the following technical advantages:

[0016] 1) In the initial state, both converter station one and converter station two are horizontal. The transmission line can be vertically passed through the vertical through-hole of converter station one and converter station two. The tension of the vertical transmission line can be measured using a fiber optic grating sensor. Figure 1 Alternatively, the conversion motor can be started, driving the first and second rotating shafts to rotate, causing the second and first conversion platforms to rotate to a position perpendicular to the base; the transmission line is then horizontally passed through the through-hole three, the vertical through-holes of the first and second conversion platforms; it is then clamped by the clamping assembly, and the tension of the transverse high-voltage transmission line is measured using a fiber optic grating sensor (e.g., ...). Figure 3 Alternatively, converter station one and converter station two can be adjusted to be one horizontal and one vertical, respectively, and tension measurement can be achieved when the transmission line is arranged in an L-shape using fiber optic grating sensors. This device facilitates precise capture of changes in lateral tension and vertical tension, thereby comprehensively and accurately reflecting the true stress state of the transmission line under complex actual working conditions, reducing usage costs, and possessing versatility.

[0017] 2) In Figure 4-5The design allows for a layout where two transfer stations are perpendicular to each other, enabling the device to simultaneously measure the tension of transmission lines under combined lateral and longitudinal stress conditions (such as L-shaped bends or crossing lines). By selectively driving the transfer stations to rotate independently or synchronously via electromagnetic clutches, multi-directional tension coupling analysis and dynamic operating condition adaptation can be achieved. This means capturing the spatial stress distribution of transmission lines under complex wind vibration and thermal expansion and contraction, and adjusting the clamping direction according to the line alignment, thus avoiding measurement errors caused by angular deviations in traditional fixed clamps. 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 first installation diagram of the present invention (the power transmission line is set vertically).

[0020] Figure 2 This is an exploded view of the fastening components and the base in this utility model.

[0021] Figure 3 This is a second installation diagram of the present invention (the power transmission line is arranged horizontally).

[0022] Figure 4 This is a third installation diagram of the present invention (the power transmission line is arranged in an L-shape).

[0023] Figure 5 This is a schematic diagram of the fourth installation in this utility model (multiple power transmission lines are arranged in an L-shape).

[0024] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0025] Figure 7 This is a partial structural diagram of the conversion component in this utility model.

[0026] In the diagram: 1. Power transmission line; 2. Base; 3. Fastening assembly; 31. Cover plate; 32. Fixing groove; 33. Through hole one; 34. Fixing ring; 35. Spring; 36. Inclined plate; 37. Through hole two; 38. Through hole three; 4. Conversion assembly; 41. Conversion motor; 42. First rotating shaft; 43. Second rotating shaft; 44. First electromagnetic clutch; 45. Conveying mechanism; 46. Conversion platform one; 47. Conversion platform two; 48. Second electromagnetic clutch; 5. Clamping assembly; 51. Limiting plate; 52. Adjusting rod; 53. Limiting groove plate; 54. Arc plate; 55. Fiber optic grating sensor. Detailed Implementation

[0027] During the operation of high-voltage power transmission systems, accurate monitoring of the tension state of transmission lines is crucial to ensuring the safe and stable operation of transmission lines. In actual operation, transmission lines are not only subject to vertical tension changes caused by their own weight, wind force and other factors, but also to lateral tension fluctuations caused by thermal expansion and contraction due to changes in ambient temperature, conductor galloping and other factors.

[0028] Existing power transmission line tension measuring devices have several limitations when measuring power transmission lines. On the one hand, most measuring devices can only measure the tension in a single direction (usually vertical), failing to comprehensively reflect the actual stress on the power transmission line under complex operating conditions. For example, in strong winds or when conductors gallop, changes in the lateral tension of the power transmission line can pose a serious threat to the safety of the line, but existing measuring devices often fail to accurately capture this crucial information.

[0029] On the other hand, existing clamping structures are difficult to achieve stable and reliable clamping of transmission lines in both the lateral and vertical directions during installation and use. Some clamping structures are simply designed and can only provide fixing force in one direction. When faced with complex environmental factors and changes in the force on the transmission line, they are prone to loosening or displacement, resulting in inaccurate measurement data or even failure of the measuring device. For example, some traditional ring-type clamps can achieve vertical clamping to a certain extent, but their lateral fixing effect is not good. When the transmission line is subjected to lateral wind force, relative sliding may occur between the clamp and the transmission line, affecting the measurement accuracy.

[0030] like Figure 1-4 As shown, a high-voltage transmission line tension measuring device includes a base 2, a conversion component 4 is disposed on the base 2, and a clamping component 5 is installed on the conversion component 4.

[0031] The conversion assembly 4 includes a first conversion platform 46 and a second conversion platform 47, which have identical structures. Both the first conversion platform 46 and the second conversion platform 47 are provided with horizontal and vertical through holes, which are perpendicular to each other and interconnected. Both the vertical and horizontal through holes allow power transmission lines to pass through.

[0032] The left and right sides of the first conversion platform 46 are fixedly connected to the first rotating shaft 42, which is rotatably mounted on the base 2 via bearings. The left and right sides of the second conversion platform 47 are fixedly connected to the second rotating shaft 43, which is rotatably mounted on the base 2 via bearings.

[0033] Furthermore, the first rotating shaft 42 and the second rotating shaft 43 on the same side are connected by a transmission mechanism 45. The first rotating shaft 42 is connected to the output end of the conversion motor 41. The conversion motor 41 is fixed on the base 2.

[0034] In addition, a first electromagnetic clutch 44 is installed on the second rotating shaft 43, and a second electromagnetic clutch 48 is installed on the first rotating shaft 42. When the first electromagnetic clutch 44 is disengaged, power cannot be transmitted to the second converter 47, and thus the second converter 47 cannot be driven to rotate; when the second electromagnetic clutch 48 is disengaged, power cannot be transmitted to the first converter 46, and thus the first converter 46 cannot be driven to rotate.

[0035] Figure 7 In order to show the first rotating axis 42 and the second rotating axis 43, they are drawn relatively long. This can be adjusted according to actual needs, and the actual application shall prevail.

[0036] When the first electromagnetic clutch 44 and the second electromagnetic clutch 48 are energized, both the first electromagnetic clutch 44 and the second electromagnetic clutch 48 are engaged, and the conversion motor 41 simultaneously drives the first rotating shaft 42 and the second rotating shaft 43 to rotate, thereby simultaneously driving the synchronous conversion operation (rotation 90 degrees) of the conversion table 1 46 and the conversion table 2 47.

[0037] When the first electromagnetic clutch 44 is de-energized and disengaged, and the second electromagnetic clutch 48 is energized and engaged, the switching motor 41 can only drive the first rotating shaft 42 when it starts, and thus drive the switching operation of the switching table 46 alone.

[0038] When the second electromagnetic clutch 48 is de-energized and disengaged, and the first electromagnetic clutch 44 is energized and engaged, the conversion motor 41 starts and can only drive the second rotating shaft 43, thereby driving the conversion operation of the second conversion table 47 independently.

[0039] like Figure 6-7 As shown, the clamping assembly 5 consists of two sets, respectively installed at the vertical through holes on the first conversion platform 46 and the second conversion platform 47. Each clamping assembly 5 includes a limiting plate 51, with one set of limiting plates 51 arranged on the first conversion platform 46 and another set arranged on the second conversion platform 47. Each set of limiting plates 51 consists of two plates, arranged alternately on the left and right sides of the first conversion platform 46 or the second conversion platform 47. An adjusting rod 52 is installed on the opposite side of each set of limiting plates 51.

[0040] The adjusting rod 52 includes a telescopic rod, which is formed by a threaded sleeve and a threaded rod connected by threads. A spring is wrapped around the telescopic rod, and the spring is in a compressed state.

[0041] One end of the threaded sleeve of each adjusting rod 52 is fixedly connected to the limiting plate 51, and the other end of the threaded rod is fixedly connected to the limiting groove plate 53. An arc-shaped plate 54 is installed on the other side of the limiting groove plate 53. The left and right arc-shaped plates 54 are arranged in a mirror symmetrical manner and form a clamping ring for the transmission line. By rotating the threaded rod, the length of the telescopic rod can be adjusted, so that the arc-shaped plate 54 adapts to the radial deformation of the transmission line, ensuring that the fiber optic grating sensor 55 is in close contact with the surface of the transmission line 1.

[0042] After the adjusting rod 52 is moved into place, the arc-shaped plate 54 clamps the power transmission line. The fiber optic grating sensor 55 embedded in the inner surface of the arc-shaped plate 54 remains in contact with the power transmission line while it is clamped.

[0043] The power transmission line can be clamped by setting the adjusting rod 52 and the arc plate 54; and with the fiber optic grating sensor 55, the tension change of the power transmission line can be accurately monitored in real time.

[0044] The fiber Bragg grating sensor 55 has extremely high sensitivity, enabling it to capture minute tension changes in transmission lines and convert them into changes in optical signals. These optical signals are transmitted to the data processing unit via optical fiber, and after complex algorithm processing and analysis, the current tension value of the transmission line can be calculated quickly and accurately.

[0045] The fiber optic grating sensor 55 also has the advantages of strong anti-electromagnetic interference capability, good stability and long service life. It can work reliably even in the complex electromagnetic environment around high-voltage transmission lines, providing a strong guarantee for the safe operation of transmission lines. It realizes comprehensive monitoring of the tension status of the entire transmission line. Once the tension of a certain section of the transmission line is abnormal, the system can issue an alarm in time so that the staff can take timely measures to deal with it.

[0046] The fiber Bragg grating sensor 55 is model HKS-S400.

[0047] In addition, a through hole 38 is provided on the right side of the base 2, through hole 38 is used for the horizontal transmission line 1 to pass through.

[0048] In addition, a controller is provided in front of the base 2, and the controller is electrically connected to the conversion motor 41, the first electromagnetic clutch 44, the second electromagnetic clutch 48 and the fiber optic grating sensor 55 respectively.

[0049] Specifically, the controller uses the S7-1214C AC / DC / RLY model, which supports multiple communication protocols and facilitates data exchange with other devices.

[0050] Figure 1 The transmission line 1 is vertically inserted into the vertical holes of the first converter platform 46 and the second converter platform 47. The arc-shaped plate 54 of the clamping assembly 5 clamps the transmission line 1 from both sides, and the fiber optic grating sensor 55 is attached and detects the vertical tension. It is suitable for measuring the vertical tension of the transmission line under conditions such as its own weight and icing, such as tension monitoring of the suspension section of the iron tower.

[0051] Figure 3The transmission line 1 is horizontally inserted through the through hole 38 of the base 2 and through the vertical through holes of the first and second conversion platforms 46 and 47. The clamping assembly 5 clamps the transmission line 1, and the fiber optic grating sensor 55 detects the lateral tension of the transmission line 1. This is used to measure the changes in horizontal tension caused by wind vibration, conductor galloping, or thermal expansion and contraction, ensuring the wind resistance stability of the line.

[0052] Figure 4 The transmission line is arranged in an L-shape. One end of transmission line 1 vertically enters the vertical perforation of converter platform 2 47 and exits through the horizontal perforation. It then horizontally enters the vertical perforation of converter platform 1 46, forming a spatial corner structure. This method is suitable for measuring the combined tension (vertical + horizontal) of corner towers or crossing lines and analyzing the impact of complex forces on line safety.

[0053] Figure 5 The transmission line is arranged in an L-shape. One end is horizontally inserted into the through hole 38 of the base 2 and the vertical through hole of the transfer platform 2 47, and enters through the horizontal through hole of the transfer platform 1 46. The other end is vertically inserted through the vertical through hole of the transfer platform 1 46, forming a spatial corner structure.

[0054] Additionally, a fastening assembly 3 is installed on the upper part of the base 2. The fastening assembly 3 includes a cover plate 31, and a fixing ring 34 is provided at the bottom of the cover plate 31. The fixing ring 34 is arranged in an arc shape. A fixing groove 32 is provided on the top surface of the base 2. The fixing groove 32 and the fixing ring 34 are interlocked for easy disassembly. The cover plate 31 facilitates dust protection for the base 2.

[0055] In addition, springs 35 are provided around the outer perimeter of the fixing ring 34, and each spring 35 is equipped with a ramp 36. There are a total of four springs 35 and ramps 36, two on each side of the fixing ring 34. Two through holes 33 are provided on each side of the corresponding base 2. The ramps 36 are inserted into the through holes 33 to fix the fixing ring 34 and the fixing groove 32. When disassembly is required, pressing the ramps 36 compresses the springs 35, disengaging the ramps 36 from the through holes 33, thus detaching the cover plate 31.

[0056] During the design process, the height of the cover plate 31 can be designed to ensure that the connection can be completed regardless of whether the first conversion platform 46 or the second conversion platform 47 is vertical or horizontal.

[0057] Install this device during the installation of power transmission lines.

[0058] Working principle and process:

[0059] 1) such as Figure 3As shown, when measuring the transverse transmission line, press the four inclined plates 36 to remove the cover plate 31; at this time, start the conversion motor 41, which drives the first rotating shaft 42 and the second rotating shaft 43 to rotate, thereby driving the second conversion platform 47 and the first conversion platform 46 to rotate to a state perpendicular to the base 2, as shown. Figure 3 As shown. The transmission line 1 passes through the through hole 38 of the base 2 and the vertical through holes of the first and second conversion platforms 46 and 47, and is clamped by the arc plate 54. Then, the cover plate 31 is fastened to the base 2 for dust prevention. After the transmission line is installed, the fiber optic grating sensor 55 is activated. The fiber optic grating sensor 55 detects the micro-strain on the surface of the transmission line caused by tension changes and transmits the optical signal to the controller through the optical fiber. The controller calculates the real-time tension value of the transmission line by demodulating the wavelength offset of the optical signal and outputs the result on the display terminal or remote monitoring system.

[0060] 2) For example Figure 1 As shown, when the measuring device is needed to measure the vertical transmission line, the first converter 46 and the second converter 47 are initially in a horizontal state. First, the cover plate 31 is removed, and the vertical transmission line passes through the vertical through holes of the first converter 46 and the second converter 47, and is clamped by the clamping assembly 5; then the transmission line is passed through the second through hole 37 of the cover plate 31, and the cover plate 31 is then fastened to the base 2 for dust prevention; after the transmission line is installed, the fiber optic grating sensor 55 is activated later to accurately measure the vertical transmission line.

[0061] Similarly, other principles are similar and will not be elaborated here.

Claims

1. A high-voltage transmission line tension measuring device, characterized in that: Includes a base (2), on which a conversion component (4) is mounted, and on which a clamping component (5) is mounted; The conversion component (4) includes a conversion platform one (46) and a conversion platform two (47). Both the conversion platform one (46) and the conversion platform two (47) are provided with horizontal and vertical through holes. The horizontal and vertical through holes allow the transmission line (1) to pass through. The conversion platform one (46) and the conversion platform two (47) are driven to rotate synchronously or independently by the drive mechanism outside the base (2). The clamping assembly (5) is set at the vertical through holes of the first converter platform (46) and the second converter platform (47). The clamping assembly (5) includes a limiting plate (51), which is arranged at intervals on the left and right. An adjusting rod (52) is installed on the opposite side of the two limiting plates (51). An arc plate (54) is installed at the end of the adjusting rod (52). Fiber grating sensors (55) are installed on the inner side of the left and right arc plates (54). When the left and right arc plates (54) clamp the transmission line (1), the fiber grating sensors (55) measure the tension of the transmission line.

2. The high-voltage transmission line tension measuring device according to claim 1, characterized in that: The driving mechanism includes a first rotating shaft (42) and a second rotating shaft (43). The first rotating shaft (42) is connected to a first conversion platform (46), and the second rotating shaft (43) is connected to a second conversion platform (47). Both the first rotating shaft (42) and the second rotating shaft (43) can be rotatably mounted on the base (2), and the first rotating shaft (42) and the second rotating shaft (43) are connected by a belt conveyor (45). The first rotating shaft (42) is driven by a conversion motor (41), which is mounted on the outside of the base (2).

3. The high-voltage transmission line tension measuring device according to claim 2, characterized in that: A second electromagnetic clutch (48) is installed on the first rotating shaft (42), and a first electromagnetic clutch (44) is installed on the second rotating shaft (43).

4. The high-voltage transmission line tension measuring device according to claim 3, characterized in that: The base (2) is U-shaped, and the horizontal part of the base (2) is provided with a through hole three (38) for the transmission line (1) to pass through.

5. A high-voltage transmission line tension measuring device according to claim 4, characterized in that: The base (2) is equipped with a fastening assembly (3) on its upper part. The fastening assembly (3) includes a cover plate (31), and a fixing ring (34) is provided at the bottom of the cover plate (31). A fixing groove (32) is provided on the top surface of the corresponding base (2). The fixing groove (32) and the fixing ring (34) are interlocked.

6. The high-voltage transmission line tension measuring device according to claim 5, characterized in that: The outer side of the fixing ring (34) is connected to the inclined plate (36) by a spring (35), and the inclined plate (36) is engaged with the through hole (33) on the base (2).

7. A high-voltage transmission line tension measuring device according to claim 6, characterized in that: The adjusting rod (52) includes a telescopic rod, which is formed by a threaded sleeve and a threaded rod connected by threads, and a spring is wrapped around the telescopic rod.

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