Overhead current collection line anti-pollution flashover insulator structure
By introducing a large shed and hoop design into the insulator structure, the creepage distance is enhanced, the problem of flashover prevention caused by icing on insulators in high-altitude humid areas is solved, the line safety and construction efficiency are improved, and production costs are reduced.
Patent Information
- Application Number
- CN202422731016.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In high-altitude, humid and frequently snowy areas, the insulators of 35kV steel tower collector lines are easily covered with ice, resulting in a reduction in creepage distance and failure to meet anti-pollution flashover requirements, leading to reduced line insulation and pollution flashover grounding tripping, affecting the safe and stable operation of wind farms.
An insulator structure for overhead collector lines is designed to prevent pollution flashover. The structure uses sheds made of composite materials, including middle sheds, small sheds, and large sheds. Large sheds are arranged at intervals on the core rod to increase the creepage distance, and the adhesive and hoop structure are used to ensure the stable installation of the large sheds.
It improves the anti-pollution flashover capability of insulators, reduces tripping events caused by insulator icing, simplifies the construction process, reduces costs and improves the safety of transmission lines and the economic benefits of wind farms.
Smart Images
Figure CN223427301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of overhead collector lines, in particular to an insulator structure for preventing pollution flashover of overhead collector lines. Background Art
[0002] Various types of composite insulators are installed on each level of the wind farm's 35kV steel tower collector line. Single-unit suspension insulators, double-unit tension insulators, and double-unit suspension insulators have a creepage distance of 400mm each. In plain areas with low humidity and light winter snowfall, steel collector towers with this insulator configuration can meet the normal operation requirements of the collector line. However, if the collector line is located in areas with an altitude of more than 1000m, high humidity, and frequent snowfall, the 35kV collector tower line and insulators are prone to ice accumulation. In this icing condition, the creepage distance of the insulator is significantly reduced, failing to meet the anti-pollution flashover and insulation requirements of the collector line during operation. This can easily lead to line insulation degradation, flashover-to-ground tripping, and serious reduction in the safe and stable operation of the wind farm in winter. Upgrades to increase the creepage distance of the insulators under icing conditions are urgently needed. Utility Model Content
[0003] The utility model is based on the above technical problems and proposes an insulator structure for preventing pollution flashover of overhead collector lines.
[0004] An insulator structure for preventing pollution flashover of an overhead collector line comprises a core rod, wherein a plurality of sheds are provided on the core rod, wherein the sheds are divided into middle sheds and small sheds, wherein the middle sheds and the small sheds are alternately distributed. A large shed is also provided on the core rod, wherein a plurality of the large sheds are evenly spaced and arranged on the core rod. The diameters of the large sheds, the middle sheds, and the small sheds gradually decrease, and a large shed is provided every two to three middle sheds. The large sheds are adhered to the sheds below them by adhesive, and the physical properties of the large sheds are consistent with those of the sheds.
[0005] Preferably, the shed is a composite insulator string made of composite material, and the large shed is a silicone rubber creepage-enhancing shed with a single-joint-surface structure.
[0006] Preferably, a center hole is provided in the center of the large umbrella skirt, an umbrella skirt disconnection opening is provided on the large umbrella skirt, a starting point of the umbrella skirt disconnection opening is the center hole, and the center hole is sleeved on the core rod.
[0007] Preferably, a hoop is provided at the center hole, the hoop is integrated with the large umbrella skirt and is made of the same material, and the hoop is provided with a hoop disconnection opening aligned with the umbrella skirt disconnection opening.
[0008] Preferably, one side of the hoop sleeve breakage opening is provided with an arc-shaped tight hoop sleeve, the material of the tight hoop sleeve is the same as the material of the large umbrella skirt, the tight hoop sleeve is attached to the hoop sleeve and is bonded to the hoop sleeve by an adhesive.
[0009] Preferably, two grooves are arranged on both sides of the hoop sleeve, the two grooves are symmetrical about the hoop sleeve breakage opening, and the inner sides of the two ends of the tight hoop sleeve are each provided with a clamping head, and the two clamping heads can be clamped into the grooves.
[0010] Beneficial effects:
[0011] 1. The utility model discloses a large umbrella skirt is arranged on the core rod, the creepage distance is increased, the anti-pollution flashover ability of the insulator is improved, the collection line tripping event caused by the icing of the insulator, the insufficient creepage distance, the reduction of insulation and pollution flashover is reduced, and the safety of the power transmission line and the economic benefit of the wind power field are improved.
[0012] 2. The utility model discloses a large umbrella skirt is arranged on the core rod, the creepage distance is increased, the anti-pollution flashover ability of the insulator is improved, the collection line tripping event caused by the icing of the insulator, the insufficient creepage distance, the reduction of insulation and pollution flashover is reduced, and the safety of the power transmission line and the economic benefit of the wind power field are improved.
[0013] 3. The special structure design of the large umbrella skirt makes it firm and not easy to fall off, and further enhances the reliability of the insulator. DRAWINGS
[0014] Figure 1 The structure schematic diagram of the utility model is shown.
[0015] Figure 2 The structure diagram of the large umbrella skirt of the utility model is shown.
[0016] Figure 3 The structure diagram of the tight hoop sleeve of the utility model is shown.
[0017] Figure 4 The schematic diagram of the tight hoop sleeve and the hoop sleeve cooperation is shown. DETAILED DESCRIPTION
[0018] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.
[0019] As Figures 1 to 4The structure of the insulator of the overhead line for preventing pollution flashover includes a core rod 1, a plurality of umbrella skirts 2 arranged on the core rod 1, the umbrella skirts 2 being divided into middle umbrella skirts 21 and small umbrella skirts 22, the middle umbrella skirts 21 and the small umbrella skirts 22 being arranged alternately, and a plurality of large umbrella skirts 3 arranged on the core rod 1, the large umbrella skirts 3 being arranged on the core rod 1 at equal intervals, the diameters of the large umbrella skirts 3, the middle umbrella skirts 21 and the small umbrella skirts 22 gradually decreasing, one large umbrella skirt 3 being arranged every 2-3 middle umbrella skirts 21, the large umbrella skirt 3 being adhered to the umbrella skirt 2 under the large umbrella skirt 3 by an adhesive, the large umbrella skirt 3 replacing the small umbrella skirt 22 on the original insulator, the diameter of the large umbrella skirt 3 being usually 200-250 mm, and the inclination angle of the umbrella skirt 2 being usually greater than 5°, the large umbrella skirt 3 greatly increasing the creepage distance of the insulator and effectively preventing the accumulation of pollution on the surface of the insulator and the occurrence of flashover, and the physical properties of the large umbrella skirt 3 being consistent with those of the umbrella skirt 2, so that the stability of the overall performance is ensured.
[0020] It should be noted that the adhesive meets the standard of GB / T 1216-2006.
[0021] The umbrella skirt 2 is made of a composite insulator string made of a composite material, has good insulation performance and weather resistance, and the large umbrella skirt 3 is made of a single bonding surface structure of silicone rubber, so that the anti-pollution flashover capability is further improved.
[0022] The center of the large umbrella skirt 3 is provided with a center hole 4 for facilitating installation on the core rod 1, the large umbrella skirt 3 is provided with an umbrella skirt breaking opening 5, the starting point of the umbrella skirt breaking opening 5 being the center hole 4, the material of the large umbrella skirt 3 being silicone rubber, the large umbrella skirt 3 being pulled apart from the umbrella skirt breaking opening 5 during installation, the large umbrella skirt 3 being installed on the core rod 1 of the insulator which has been installed, the center hole 4 being provided with a hoop 6 which is integrated with the large umbrella skirt 3 and has the same material as the large umbrella skirt 3, the hoop 6 being provided with a hoop breaking opening 7 which is aligned with the umbrella skirt breaking opening 5, the hoop 6 also being sleeved on the core rod 1 during installation of the large umbrella skirt 3, the height of the hoop 6 being designed according to the distance between the middle umbrella skirts 21 and the small umbrella skirts 22, so that the hoop 6 is tightly arranged on the lower side of the umbrella skirt 2 on the upper layer, and the structure design makes the large umbrella skirt 3 firmly installed and not easy to fall off.
[0023] During installation, the adhesive can be coated on the inner circle of the hoop 6, the lower side of the large umbrella skirt 3 or the upper side of the umbrella skirt 2 under the large umbrella skirt 3, and the adhesive also needs to be coated on the sections of the umbrella skirt breaking opening 5 and the hoop breaking opening 7.
[0024] An arc-shaped tight hoop 8 is provided on one side of the hoop sleeve disconnection port 7. The tight hoop 8 fits on the hoop sleeve 6 and is bonded to the hoop sleeve 6 with an adhesive. Two grooves 10 are provided on both sides of the hoop sleeve 6. A clamp 9 is provided on the inner side of each end of the tight hoop sleeve 8. The two clamps 9 can be snapped into the groove 10, and the tight hoop sleeve 8 and the hoop sleeve 6 are bonded together with an adhesive. These structural designs enable the large shed 3 to be firmly mounted on the core rod 1 and is not prone to loosening or displacement during use, thereby ensuring the reliable operation of the insulator.
[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. An insulator structure for preventing pollution flashover of an overhead collector line, comprising a core rod, wherein a plurality of sheds are provided on the core rod, wherein the sheds are divided into middle sheds and small sheds, wherein the middle sheds and the small sheds are alternately distributed, and wherein: The core rod is also provided with a large umbrella skirt, and a plurality of the large umbrella skirts are evenly spaced on the core rod. The diameters of the large umbrella skirt, the middle umbrella skirt and the small umbrella skirt gradually decrease. A large umbrella skirt is provided every 2 to 3 middle umbrella skirts. The large umbrella skirt is adhered to the umbrella skirt of the lower layer by an adhesive, and the physical properties of the large umbrella skirt are consistent with those of the umbrella skirt.
2. The insulator structure for preventing pollution flashover of overhead collector lines according to claim 1, characterized in that: The shed is a composite insulator string made of composite material, and the large shed is a silicone rubber creepage-enhancing shed with a single-joint-surface structure.
3. The insulator structure for preventing pollution flashover of overhead collector lines according to claim 2, characterized in that: A center hole is provided in the center of the large umbrella skirt, and an umbrella skirt disconnection opening is provided on the large umbrella skirt. The starting point of the umbrella skirt disconnection opening is the center hole, and the center hole is sleeved on the core rod.
4. The insulator structure for preventing pollution flashover of overhead collector lines according to claim 3, characterized in that: A hoop is provided at the center hole. The hoop is integrated with the large umbrella skirt and made of the same material. A hoop disconnection opening aligned with the umbrella skirt disconnection opening is provided on the hoop.
5. The insulator structure for preventing pollution flashover of overhead collector lines according to claim 4, characterized in that: An arc-shaped tight hoop is provided on one side of the hoop cutout. The material of the tight hoop is the same as that of the large umbrella skirt. The tight hoop is fitted on the hoop and adhered to the hoop by adhesive.
6. The insulator structure for preventing pollution flashover of overhead collector lines according to claim 5, characterized in that: Two grooves are provided on both sides of the hoop, and the two grooves are symmetrical with the hoop breaking opening as the central axis. A clamp is provided on the inner side of each of the two ends of the tight hoop, and the two clamps can be clamped into the grooves.