Wind-resistant protection structure for insulator
By setting a rotating mechanism and a pendulum mechanism on the insulator, the wind load is distributed and vortex-induced vibration is suppressed, thus solving the mechanical fatigue and electrical safety problems of the insulator under high wind conditions and achieving higher mechanical stability and electrical reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-09
AI Technical Summary
Existing insulators are prone to abnormal swinging of the skirts, excessive stress at the hardware connection points, and collision and breakage of adjacent units under dynamic wind loads under high wind conditions. This can lead to mechanical fatigue fracture, sudden drop in flashover voltage, or leakage due to broken insulation skirts, thereby damaging the electrical safety barrier of the line.
A wind-resistant protection structure for an insulator was designed, including a rotating mechanism and a pendulum mechanism. The wind load is decomposed by the double bearing system of the rotating mechanism, and the inertial torque of the tungsten alloy pendulum and the guide groove suppress vortex-induced vibration to achieve dynamic wind resistance.
It effectively reduces the wear rate and eddy-induced vibration of insulators under wind load, improves mechanical stability and electrical safety, and prevents mechanical fatigue fracture and flashover voltage drop.
Smart Images
Figure CN224342116U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of insulators, specifically a wind-resistant protection structure for insulators. Background Technology
[0002] Insulators are rigid insulating components in power systems made of ceramic, glass, or composite materials. They increase the creepage distance through a skirt structure and use a high dielectric strength medium (such as SiO2) to block the current path between the conductor (wire / equipment) and the grounding body (tower / framework). At the same time, they are connected by metal fittings (ball heads, steel feet) to withstand mechanical loads (such as conductor tension and wind pressure). They achieve potential isolation (withstand voltage >100kV), prevent flashover (leakage current <1mA under wet / polluted conditions), and provide spatial positioning (bending strength >8kN). Their performance depends on the flashover voltage threshold, pollution level matching (creep distance ≥20mm / kV), and mechanical damage load (>40kN).
[0003] Existing insulators may experience abnormal swaying of the skirts, excessive stress at hardware connection points, and collision and breakage of adjacent units under high wind conditions due to dynamic wind loads. This can lead to mechanical fatigue fracture, sudden drop in flashover voltage, or leakage due to broken insulation skirts, ultimately compromising the electrical safety barrier of the line. Based on this, this utility model designs a wind-resistant protection structure for insulators to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a wind-resistant protection structure for insulators to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A wind-resistant protection structure for an insulator includes a first mounting plate, an insulator string, and a second mounting plate. A rotating mechanism and a pendulum mechanism are symmetrically arranged on the left and right sides of the insulator string. The rotating mechanism includes a mounting plate, a fixing plate, a first fixing rod, a fixing nut, a first bushing, a first graphite self-lubricating bearing, a second fixing rod, a second bushing, and a second graphite self-lubricating bearing. A mounting plate is fixedly installed on the outer wall of the insulator string, and a fixing plate is fixedly connected to the outer wall of the mounting plate. The middle of the fixing plate is connected to the fixing nut via the first fixing rod. A bushing is provided, in which a first graphite self-lubricating bearing is provided to connect a second fixed rod. The end of the second fixed rod is connected to a pendulum mechanism through the second bushing and the second graphite self-lubricating bearing. The pendulum mechanism includes a hanging rod, a tungsten alloy pendulum, a guide groove, and a limiting nut. A limiting nut is provided above the hanging rod, and the hanging rod is fixed to the second graphite self-lubricating bearing through the limiting nut. The lower end of the hanging rod is fixed to the tungsten alloy pendulum. A swirling guide groove is formed on the surface of the tungsten alloy pendulum, and multiple sets of the guide grooves are distributed from top to bottom on the surface of the tungsten alloy pendulum.
[0007] Optionally, the tungsten alloy pendulum accounts for 3%-5% of the total weight of the insulator string.
[0008] Optionally, the guide grooves are evenly distributed from top to bottom on the surface of the tungsten alloy pendulum.
[0009] Optionally, the density of the tungsten alloy pendulum material is 16.5-19.0 g / cm³. 3 .
[0010] Optionally, the wind vibration suppression group formed by the rotating mechanism and the pendulum mechanism is symmetrically distributed on both sides of the insulator string.
[0011] Optionally, the first fixed rod and the second fixed rod form a three-dimensional rotational degree of freedom through a bushing and a bearing assembly.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. In this utility model, a rotating mechanism is provided, and the orthogonal arrangement of the two bearings allows the wind load to be decomposed into multi-directional components. The first graphite self-lubricating bearing bears the axial load, and the second graphite self-lubricating bearing bears the radial load, thereby reducing the wear rate of a single bearing. The rigid connection between the mounting plate and the fixed plate ensures that the vibration energy is efficiently transmitted to the damping system.
[0014] 2. In this utility model, a pendulum mechanism is provided. The high density characteristics of the tungsten alloy pendulum enable it to generate sufficient inertial torque with a mass ratio of 3%-5%, which reduces the frontal area significantly compared to traditional counterweights. The guide groove disrupts the laminar flow state of the airflow, suppresses vortex-induced vibration, and reduces the Karman vortex street frequency. Attached Figure Description
[0015] Figure 1 This is a three-dimensional front view structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view.
[0017] Figure 3 This is a three-dimensional top view of the structure of this utility model;
[0018] Figure 4 This is a top view of the structure of this utility model;
[0019] Figure 5 This is a three-dimensional left-side view structural schematic diagram of the present invention;
[0020] Figure 6 This is a three-dimensional right-view structural schematic diagram of the present invention;
[0021] Figure 7This is a three-dimensional, bottom-view structural diagram of the present invention;
[0022] Figure 8 This utility model Figure 5 A magnified three-dimensional structural diagram of point A in the middle;
[0023] Figure 9 This utility model Figure 2 A magnified three-dimensional structural diagram of point B in the middle.
[0024] In the diagram: 1. First hanging plate; 2. Insulator string; 3. Second hanging plate; 4. Rotation mechanism; 401. Mounting plate; 402. Fixing plate; 403. First fixing rod; 404. Fixing nut; 405. First bushing; 406. First graphite self-lubricating bearing; 407. Second fixing rod; 408. Second bushing; 409. Second graphite self-lubricating bearing; 5. Pendulum mechanism; 501. Hanging rod; 502. Tungsten alloy pendulum; 503. Guide groove; 504. Limiting nut. Detailed Implementation
[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figures 1-9 In this embodiment of the utility model, a wind-resistant protection structure for an insulator includes a first hanging plate 1, an insulator string 2, and a second hanging plate 3. A rotating mechanism 4 and a pendulum mechanism 5 are symmetrically arranged on the left and right sides of the insulator string 2. The rotating mechanism 4 includes a mounting plate 401, a fixing plate 402, a first fixing rod 403, a fixing nut 404, a first bushing 405, a first graphite self-lubricating bearing 406, a second fixing rod 407, a second bushing 408, and a second graphite self-lubricating bearing 409. The mounting plate 401 is fixedly installed on the outer wall of the insulator string 2, and the fixing plate 402 is fixedly connected to the outer wall of the mounting plate 401. The middle part of the fixing plate 402 is connected to the fixing nut 404 via the first fixing rod 403. A bushing 405 is provided, and a first graphite self-lubricating bearing 406 is provided inside the bushing 405 to connect to a second fixed rod 407. The end of the second fixed rod 407 is connected to the pendulum mechanism 5 through a second bushing 408 and a second graphite self-lubricating bearing 409. The pendulum mechanism 5 includes a hanging rod 501, a tungsten alloy pendulum 502, a guide groove 503 and a limiting nut 504. A limiting nut 504 is provided above the hanging rod 501. The hanging rod 501 is fixed to the second graphite self-lubricating bearing 409 by the limiting nut 504. The lower end of the hanging rod 501 is fixed to the tungsten alloy pendulum 502. A swirling guide groove 503 is opened on the surface of the tungsten alloy pendulum 502. Multiple sets of guide grooves 503 are distributed from top to bottom on the surface of the tungsten alloy pendulum 502.
[0029] Mounting plate 401: A stainless steel plate is welded to the steel cap of insulator string 2, and its width matches the diameter of the insulator.
[0030] Bearing system assembly: The first fixing rod 403 is passed through the center hole of the fixing plate 402 and locked by the fixing nut 404; the first graphite self-lubricating bearing 406 is press-fitted into the first bushing 405, and the second fixing rod 407 passes through the inner ring of the bearing; the second bushing 408 and the second graphite self-lubricating bearing 409 form an orthogonal rotating pair, and the axes of the two bearings are intersecting.
[0031] Hanging rod 501: The upper end is fixed to the inner ring of the second graphite self-lubricating bearing 409 by a limiting nut 504.
[0032] Tungsten alloy pendulum 502: Made of high-density tungsten alloy (density 16.5-19.0 g / cm³). 3Compared to steel, it can reduce volume by more than 30% and avoid interference with the electrical performance of insulators.
[0033] The working principle of this utility model is as follows: The wind-resistant protection structure of the insulator achieves dynamic wind resistance through the synergistic action of the rotating mechanism 4 and the pendulum mechanism 5. When the wind force acts on the insulator string 2, the rotating mechanism 4 achieves three-dimensional torque transmission through a double bearing system: the first graphite self-lubricating bearing 406 converts the insulator deflection torque into the rotational motion of the second fixed rod 407, and the second graphite self-lubricating bearing 409 decomposes this motion into the swing of the hanging rod 501. The tungsten alloy pendulum 502, due to its high density, generates a significant inertial hysteresis effect. Its motion phase difference forms a tensile torque opposite to the direction of the wind load. The vibration energy is converted into the rotational kinetic energy of the tungsten alloy pendulum 502, like the counterweight at the bottom of a "roly-poly toy". When the wind blows the insulator, the pendulum pulls in the opposite direction due to inertia. The spiral guide groove 503 on the surface of the tungsten alloy pendulum 502 disrupts the laminar flow of the airflow, suppresses vortex-induced vibration, and reduces the Karman vortex street frequency. The rotating mechanism 4 achieves multi-directional decomposition of torque through the cross-arranged double bearing system, forming a stabilizing effect similar to a gyroscope.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A wind-resistant protection structure for an insulator, comprising a first mounting plate (1), an insulator string (2), and a second mounting plate (3), characterized in that: The insulator string (2) is symmetrically provided with a rotating mechanism (4) and a pendulum mechanism (5) on its left and right sides; the rotating mechanism (4) includes a mounting plate (401), a fixing plate (402), a first fixing rod (403), a fixing nut (404), a first bushing (405), a first graphite self-lubricating bearing (406), a second fixing rod (407), a second bushing (408), and a second graphite self-lubricating bearing (409). The mounting plate (401) is fixedly installed on the outer wall of the insulator string (2), and the fixing plate (402) is fixedly connected to the outer wall of the mounting plate (401). The middle part of the fixing plate (402) is connected to the first bushing (405) through the first fixing rod (403) and the fixing nut (404). The first bushing (405) is provided with a first graphite self-lubricating material. The bearing (406) is connected to the second fixed rod (407), and the end of the second fixed rod (407) is connected to the pendulum mechanism (5) through the second bushing (408) and the second graphite self-lubricating bearing (409). The pendulum mechanism (5) includes a hanging rod (501), a tungsten alloy pendulum (502), a guide groove (503) and a limiting nut (504). The upper part of the hanging rod (501) is provided with a limiting nut (504). The hanging rod (501) is fixed to the second graphite self-lubricating bearing (409) through the limiting nut (504). The lower end of the hanging rod (501) is fixed to the tungsten alloy pendulum (502). The surface of the tungsten alloy pendulum (502) is provided with a swirling guide groove (503). Multiple sets of the guide grooves (503) are distributed from top to bottom on the surface of the tungsten alloy pendulum (502).
2. The wind-resistant protection structure for an insulator according to claim 1, characterized in that: The tungsten alloy pendulum (502) accounts for 3%-5% of the total weight of the insulator string (2).
3. The wind-resistant protection structure for an insulator according to claim 1, characterized in that: The guide grooves (503) are evenly distributed from top to bottom on the surface of the tungsten alloy pendulum (502).
4. The wind-resistant protection structure for an insulator according to claim 1, characterized in that: The tungsten alloy pendulum (502) has a material density of 16.5-19.0 g / cm³. 3 .
5. The wind-resistant protection structure for an insulator according to claim 1, characterized in that: The wind vibration suppression group, consisting of the rotating mechanism (4) and the pendulum mechanism (5), is symmetrically distributed on both sides of the insulator string (2).
6. The wind-resistant protection structure for an insulator according to claim 1, characterized in that: The first fixed rod (403) and the second fixed rod (407) form a three-dimensional rotational degree of freedom through a bushing and a bearing assembly.