CN203276976U - Segmental duplex V-shaped overhanging string of composite insulator of anti-dropping string of +/- 800kV extra-high voltage direct-current line - Google Patents

Abstract

The utility model discloses a segmental duplex V-shaped overhanging string of an anti-dropping string composite insulator of a +/- 800kV extra-high voltage direct-current line, and relates to the technical field of electric power. The overhanging string comprises two overhanging insulator strings. Each of the two overhanging insulator strings comprises a triangular link plate and two groups of long composite insulator strings. The lower end of each group of the long composite insulator strings is connected with the corresponding triangular link plate through a lining-type sealed bowl head. Each group of the long composite insulator strings comprises two composite insulators which are connected to an identical lopsided board via the lining-type sealed bowl heads. The upper end of each group of the long composite insulator strings is connected with one lining-type sealed bowl head, the upper end of which is connected with an EB hanging point fitting via a right-angle hanging plate. The lower end of the triangular link plate of each of the overhanging insulator strings is connected with one of the right-angle hanging plates. The lower ends of the right-angle hanging plates are connected to an identical overhanging link plate. The overhanging string is high in flexibility, and the reliability and stability are improved by utilizing the connection types of sealed ball and nest.

Description

± 800kV UHVDC Transmission Lines string falling prevention synthetic insulator merogenesis duplex V-type suspension string

Technical field

The utility model relates to power technology field, the particularly technical field of structures of UHVDC Transmission Lines string falling prevention synthetic insulator merogenesis duplex V-type suspension string.

Background technology

In recent years, along with the develop rapidly of China's power grid construction and the continuous lifting of technical merit, the V-type insulator string is widely applied on transmission line day by day.Particularly the advantage of V-type composite insulation substring is very remarkable in ± 800kV extra-high voltage direct-current engineering, is conducive to reduce the accidents such as wire windage yaw, pollution flashover on the one hand, has improved the operation of power networks reliability; Be conducive on the other hand dwindle the circuit width of corridor, economize the land resource.

But because variation has occured V-type composite insulation substring stress, under new service condition, also brought new problem, especially on compact line, repeatedly at strong wind, wave under condition, composite insulation substring steel pin has occured deviate from the situation of string from socket-clevis eye.

In addition, along with the raising of transmission line electric pressure, the reinforcement of external insulator level, insulator string length constantly lengthens, and has increased the difficulty that the synthetic insulator product is made and transported.

Therefore, in order to guarantee the operation of electrical network long-term safety and to satisfy the needs that power grid construction develops, optimize and improve traditional " bulb-bowl head " the end metal fitting bind mode of synthetic insulator, very urgent.

The utility model content

The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of ± 800kV UHVDC Transmission Lines string falling prevention synthetic insulator merogenesis duplex V-type suspension string to be provided.

The utility model comprises two suspension insulators, every described suspension insulator comprises that respectively a triangle yoke plate and two is combined into the long string of insulator, and the lower end of every group of long string of described synthetic insulator is respectively by lining type sealed socket and corresponding triangle yoke plate connection; Every group of long string of described synthetic insulator comprises respectively and is connected to two synthetic insulators same by lining type sealed socket respectively between described two synthetic insulators and lays particular stress on plate; The upper end of every group of long string of described synthetic insulator is connected with respectively lining type sealed socket, is connected with the EB hardware by the right angle link plate in the upper end of lining type sealed socket; The lower end of the triangle yoke plate of described every suspension insulator is connected with respectively the right angle link plate, and the lower end of each right angle link plate is connected on same hanging yoke plate; The V-shaped arrangement on hanging yoke plate of described two suspension insulators is installed respectively grading ring on the bulb rod of described each suspension insulator, be connected with suspension clamp on described hanging yoke plate.

Due to the stressed particularity of the suspension insulator of V-shaped arrangement, if pressurized is seriously inconsistent under the strong wind operating mode, can cause locking pin distortion ball-and-socket Joint failure, composite insulation substring steel pin deviates from the string accident from socket-clevis eye.For guaranteeing the safe and reliable of design, gold utensil is connected on overall structure and can forms soft chain except considering, has especially guaranteed the closure of gold utensil insulator string in ball, bowl hinged place.Above-mentioned suspension insulator is the composite insulation substring, reliable for guaranteeing line security, when the gold utensil type selecting, stress in particular ball, nest gold utensil on the fair line road, all have a flexibility of rotation perpendicular to line direction, therefore above-mentioned every suspension insulator comprises two synthetic insulators, and two synthetic insulators are laid particular stress on sheet by lining type sealed socket and one respectively and connected into a whole piece suspension insulator.After every suspension insulator upper end employing lining type sealed socket connects the right angle link plate, be connected on hardware, the lower end also adopts lining type sealed socket to connect right angle link plate, hanging yoke plate.Compare traditional V-type insulator string and connect, have higher flexibility, and adopt closed ball, nest connected mode at suspension insulator two ends, improved the reliability of ball, nest hinged place, strengthened the stability under various operating modes.

Technique scheme can also be done following improvement: hanging yoke plate can install heavy punch piece additional as required.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 be Fig. 1 at A-A to partial schematic diagram.

Embodiment

As shown in Figure 1, 2, the utility model comprises two suspension insulators 1, every suspension insulator 1 comprises that respectively a triangle yoke plate 8 and two is combined into the long string 2 of insulator, and the lower end that often is combined into the long string 2 of insulator is respectively by lining type sealed socket 4 and corresponding triangle yoke plate 8 connections; Often be combined into the long string 2 of insulator and comprise respectively two synthetic insulator 2-1,2-2, be connected to same by lining type sealed socket 4 respectively between two synthetic insulator 2-1,2-2 and lay particular stress on plate 3; The upper end that often is combined into the long string 2 of insulator is connected with respectively lining type sealed socket 4, is connected with EB hardware 6 by right angle link plate 5 in the upper end of lining type sealed socket 4; The lower end of the triangle yoke plate 8 of every suspension insulator 1 is connected with respectively right angle link plate 5, and the lower end of each right angle link plate 5 is connected on same hanging yoke plate 9; Article two, suspension insulator 1 V-shaped arrangement on hanging yoke plate 9 is installed respectively grading ring 7 on the bulb rod of each suspension insulator 1, be connected with symmetrically respectively suspension clamp 10 and heavy punch piece 11 on hanging yoke plate 9.

Claims (2)

1. ± 800kV UHVDC Transmission Lines string falling prevention synthetic insulator merogenesis duplex V-type suspension string, comprise two suspension insulators, it is characterized in that: every described suspension insulator comprises that respectively a triangle yoke plate and two is combined into the long string of insulator, and the lower end of every group of long string of described synthetic insulator is respectively by lining type sealed socket and corresponding triangle yoke plate connection; Every group of long string of described synthetic insulator comprises respectively and is connected to two synthetic insulators same by lining type sealed socket respectively between described two synthetic insulators and lays particular stress on plate; The upper end of every group of long string of described synthetic insulator is connected with respectively lining type sealed socket, is connected with the EB hardware by the right angle link plate in the upper end of lining type sealed socket; The lower end of the triangle yoke plate of described every suspension insulator is connected with respectively the right angle link plate, and the lower end of each right angle link plate is connected on same hanging yoke plate; The V-shaped arrangement on hanging yoke plate of described two suspension insulators is installed respectively grading ring on the bulb rod of described each suspension insulator, be connected with suspension clamp on described hanging yoke plate.

2. according to claim 1 ± 800kV UHVDC Transmission Lines string falling prevention synthetic insulator merogenesis duplex V-type suspension string is characterized in that: be connected with heavy punch piece on described hanging yoke plate.

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