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CN-122016220-A - Edge rotation measuring device for wire icing test and use method

CN122016220ACN 122016220 ACN122016220 ACN 122016220ACN-122016220-A

Abstract

The invention relates to the technical field of wire tests, in particular to an edge rotation measuring device for a wire icing test and a using method. The edge rotation measuring device for the wire icing test comprises at least two rotation test assemblies which are arranged at intervals and comprise a first rotation test assembly and a second rotation test assembly, wherein the first rotation test assembly comprises a first support plate, a first resistance piece group and a first rotation disc, the first support plate is provided with at least one through hole, a wire is suitable for being penetrated in the through hole, the wire is rotationally connected with the first support plate, the first resistance piece group is arranged on the first surface of the first support plate, and the first rotation disc is fixedly connected with the wire. The invention provides an edge rotation measuring device for a wire icing test and a use method thereof, which are used for solving the problems that the conventional icing test device ignores the torsion degree of freedom of a wire, is difficult to truly reflect the icing evolution behavior of the wire under the condition of having the rotation capability, and has deviation between a test result and an actual working condition.

Inventors

  • LI CHEN
  • LI DANYU
  • LIU BIN
  • ZHANG GUOQIANG
  • FAN WENQI
  • SHI JIANGTAO
  • WANG JIAN

Assignees

  • 国网电力工程研究院有限公司
  • 国网天津市电力公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (10)

  1. 1. An edge rotation measuring device for wire icing test is suitable for locating in icing wind tunnel, which is characterized in that the device comprises: the at least two rotation test assemblies are arranged at intervals and comprise a first rotation test assembly and a second rotation test assembly; The first rotating test assembly comprises a first supporting plate (1), a first resistance element group (6) and a first rotating disc (4), wherein at least one through hole is formed in the first supporting plate (1), a wire is arranged in the through hole in a penetrating mode, the wire is connected with the first supporting plate (1) in a rotating mode, the first resistance element group (6) is arranged on the first surface (101) of the first supporting plate (1), the first resistance element group (6) is arranged on the periphery of the wire, the first rotating disc (4) is fixedly connected with the wire, the first resistance element group (6) is fixedly arranged on the first surface (101) of the first supporting plate (1), the first rotating disc (4) is arranged on one side, deviating from the first surface (101), of the first resistance element group (6) and the first rotating disc (4) are connected.
  2. 2. The edge rotation measuring device for wire icing test according to claim 1, wherein the first rotating disc (4) comprises a first fixing ring (401) and at least one first torsion plate (402), the first torsion plate (402) is arranged on the periphery of the first fixing ring (401), a plurality of fixing holes (403) are formed in the first fixing ring (401), and the fixing holes (403) are suitable for being penetrated by fasteners.
  3. 3. The wire icing test edge rotation measurement device according to claim 2, characterized in that the first resistance element group (6) comprises four first elastic elements (601), adjacent first elastic elements (601) are arranged at right angles, and the first torsion plate (402) is connected with the first elastic elements (601).
  4. 4. An edge rotation measuring device for wire icing test according to claim 3, characterized in that said first resistance element group (6) further comprises four "L" -shaped first fixing plates (602), said first elastic element (601) being arranged between adjacent ones of said first fixing plates (602).
  5. 5. The wire icing test edge rotation measurement device according to claim 2, further comprising a first measurement assembly provided on the first surface (101) of the first support plate (1) for measuring the rotation angle of the first torsion plate (402).
  6. 6. The edge rotation measurement device for wire icing tests according to claim 5, wherein the first measurement assembly comprises a second fixing plate (5) and a laser displacement distance meter, the second fixing plate (5) is arranged on the first surface (101), and the laser displacement distance meter is arranged on the second fixing plate (5).
  7. 7. The wire icing test edge rotation measurement device according to claim 1, characterized in that the first rotation test assembly further comprises a first connection flange (2) and a first bearing (3), the first connection flange (2) is connected with the first support plate (1), the first connection flange (2) is arranged on the second surface (103) of the first support plate (1), the first bearing (3) is arranged in an inner hole (201) of the first connection flange (2), and the first bearing (3) is suitable for penetrating the wire.
  8. 8. The edge rotation measuring device for wire icing test according to claim 7, characterized in that a first fixing portion (303) extends from a first inner ring (301) of the first bearing (3) towards a direction away from the second surface (103) of the first support plate (1), at least three fastening holes (304) are formed in the circumferential direction of the first fixing portion (303), and fasteners penetrate into the fastening holes (304) and fix the wire.
  9. 9. An edge rotation measuring device for wire icing test according to claim 1, characterized in that one of said through holes corresponds to one wire, one of said through holes corresponds to one of said first set of resistance elements (6), and one of said through holes corresponds to one of said first rotating discs (4).
  10. 10. The method for using the edge rotation measuring device for the wire icing test is characterized in that the wire slowly icing in the icing wind tunnel drives the first rotating disc (4) to rotate relative to the first resistance element group (6) so as to simulate the torsion of the wire in the icing process.

Description

Edge rotation measuring device for wire icing test and use method Technical Field The invention relates to the technical field of wire tests, in particular to an edge rotation measuring device for a wire icing test and a using method. Background Overhead transmission lines are operated in a field environment for a long time and are easily affected by severe weather conditions such as rain, snow, freezing, strong wind and the like. Under the weather of rain, snow and freezing, the surface of the lead is easy to form ice coating phenomena with different forms and thicknesses. When the ice coating continuously develops and reaches a certain degree, the dead weight and wind load of the wire are obviously increased, and the phenomena of repeated ice breaking and ice removing jumping can be possibly caused, so that the impact is caused on the safety of the circuit structure. In addition, the icing wire is easy to generate large-amplitude galloping under the action of wind, the vibration amplitude is far greater than that of the conventional wind-induced vibration, and interphase flashover and tower inversion can be caused when the icing wire is severe. Therefore, the icing process and the evolution mechanism of the power transmission wire are studied deeply, and the method is an important foundation for improving the disaster prevention and reduction capability of the power transmission line. At present, aiming at the problem of wire icing in engineering practice, a weather data-based rain and snow freezing monitoring and early warning method is mostly relied on to macroscopically evaluate icing risks, experimental researches on wire icing formation mechanisms and development rules thereof are relatively few, only a few students develop mechanistic researches on wire icing by means of experimental conditions such as icing wind tunnels, and related experimental methods and devices are still to be perfected. In the existing wire icing test research, a wire segment model with fixed support is generally adopted, and an icing formation process test is carried out in an icing wind tunnel so as to obtain icing morphological characteristics under different meteorological parameter conditions. However, in the actual running process of the power transmission line, the wire is not a completely rigid fixing structure, and the wire can freely rotate, especially after uneven icing is formed on the surface of the wire, the additional gravity distribution is unbalanced, and the rotation deformation of the wire in the radial direction (the diameter direction of the wire) is easy to induce, so that the windward posture and the local pneumatic condition of the wire are changed, and the icing form and the development process are obviously changed. The existing icing test device generally ignores the torsion freedom degree of the wire, regards the wire as a fixed attitude structure, and is difficult to truly reflect the icing evolution behavior of the wire under the condition of rotating capacity, so that a test result is deviated from an actual working condition. Disclosure of Invention The invention provides an edge rotation measuring device for a wire icing test and a use method thereof, which are used for solving the problems that the conventional icing test device ignores the torsion degree of freedom of a wire, the wire is regarded as a fixed posture structure, icing evolution behavior of the wire under the condition of rotating capability is difficult to be truly reflected, and a test result and an actual working condition deviate. In a first aspect, the present invention provides an edge rotation measurement device for icing test of a wire, which is suitable for being arranged in an icing wind tunnel, and includes: the at least two rotation test assemblies are arranged at intervals and comprise a first rotation test assembly and a second rotation test assembly; The first rotating test assembly comprises a first supporting plate, a first resistance component group and a first rotating disc, wherein at least one through hole is formed in the first supporting plate, a wire is arranged in the through hole in a penetrating mode, the wire is connected with the first supporting plate in a rotating mode, the first resistance component group is arranged on the first surface of the first supporting plate, the first resistance component group is arranged on the periphery of the wire, the first rotating disc is fixedly connected with the wire, the resistance component group is fixedly arranged on the first surface of the first supporting plate, the first rotating disc is arranged on one side, deviating from the first surface, of the first resistance component group, and the first resistance component group is connected with the first rotating disc. The wire slowly freezes in the icing wind tunnel to drive the first rotating disc to rotate relative to the first resistance element group so as to simulate the torsion of the wire in the icin