CN102280227A

CN102280227A - Composite insulator tension string of overhead transmission line

Info

Publication number: CN102280227A
Application number: CN 201110207506
Authority: CN
Inventors: 王茂成; 姚建生
Original assignee: JIANGSU TIANNAN POWER EQUIPMENT CO Ltd; YANTAI ELECTRIC POWER DESIGN INSTITUTE CO LTD; Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Current assignee: JIANGSU TIANNAN POWER EQUIPMENT CO Ltd; YANTAI ELECTRIC POWER DESIGN INSTITUTE CO LTD; Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date: 2011-07-15
Filing date: 2011-07-15
Publication date: 2011-12-14

Abstract

The present invention discloses a composite insulator tension string of an overhead transmission line, comprising two composite insulators (1), and characterized in that each composite insulator is provided with a ball socket structure (2) on one end and a ball head structure (3) on the other end, wherein the ball socket structure is connected with a grounding end hardware string, the ball head structure is connected with a high voltage hardware string, the grounding end hardware string or the high voltage hardware string is provided with at least two inner arc U shaped rings (12), and the inner arc U shaped rings (12) are connected ring by ring. By changing the connecting manner of the hardware, the hardware string is capable of axially rotating with a certain angle, thus avoiding the axial torsion of the composite insulators, and avoiding destroying the connecting strength of a core rod and hardware at end portions.

Description

A kind of overhead transmission line composite insulator strain insulator-string

Technical field:

The present invention relates to a kind of overhead transmission line composite insulator strain insulator-string, belong to the design of electric power system overhead transmission line, operation, maintenance field.

Background technology:

At present, composite insulator strain insulator-strings all in the overhead transmission line mainly are made up of composite insulator and line hardware, mainly are divided into inner inlaying type composite insulator strain insulator-string and compression joint type composite insulator strain insulator-string.(#1～#15 is a compression joint type to one group of 500kY strain insulator composite insulator that Shandong Research Inst. of Electric Power carried out in 2005, #16～#27 is an inner inlaying type) ± 10 ° of pull and torsion test data show: the test product that the end is connected to compression joint type through draw turn round composite test after the mechanical damage load in various degree reduction (on average reducing by 5%) is all arranged, and the inner inlaying type test product through draw turn round composite test after mechanical damage load raise on the contrary (on average improving 6%).This is because the mechanical load of compression joint type test product is a process that descends gradually, and the inner inlaying type test product is carved the pulling force that bears the piece both sides after turning round composite test and redistributed through drawing, and the mechanical damage load wants high than initial value.Because the inner inlaying type manufacture craft is not really ripe, so far, selects the compression joint type composite insulator mostly for use, like this, the mechanical performance decline phenomenon of compression joint type composite insulator in running is inevitable.And low-angle takes place and reverses in the composite insulator that said structure causes being made up of flexible material under various unfavorable operating modes, thereby weakens the bonding strength of plug and end gold utensil.

Summary of the invention:

The objective of the invention is to overcome the deficiency of above-mentioned prior art and provide a kind of by changing the connected mode between the gold utensil, make the gold utensil string can the certain angle earth's axis to reversing, thereby avoid composite insulator generation axial torsion, destroy the overhead transmission line composite insulator strain insulator-string of the strength of connection of plug and end gold utensil.

Purpose of the present invention can reach by following measure: a kind of overhead transmission line composite insulator strain insulator-string, it comprises two composite insulators, an end that it is characterized in that each composite insulator is provided with socket arrangement, the other end is provided with ball head structure, socket arrangement connects earth terminal gold utensil string, ball head structure connects high-pressure side gold utensil string, and earth terminal gold utensil string or high-pressure side gold utensil string are provided with at least two inner arc U-loops, and inner arc U-loop ring-ring joins.

In order further to realize purpose of the present invention, inner arc U-loop, two yoke plates, U-loop, prolongation ring, U-loop that described earth terminal gold utensil string is joined by ball-eye, ring-ring connect and compose successively, ball-eye is connected with socket arrangement, described high-pressure side gold utensil string is connected and composed successively by socket-clevis eye, two yoke plates, U-loop, strain clamp, and socket-clevis eye is connected with ball head structure.

In order to realize that further purpose of the present invention, described socket-clevis eye adopt WS type socket-clevis eye.

In order further to realize purpose of the present invention, described this earth terminal gold utensil string is connected and composed successively by ball-eye, right angle link plate, two yoke plates, U-loop, prolongation ring, U-loop, ball-eye is connected with socket arrangement, ball head structure connects high-pressure side gold utensil string, the inner arc U-loop that high-pressure side gold utensil string is joined by socket-clevis eye, ring-ring, two yoke plates, U-loop, strain clamp connect and compose successively, and socket-clevis eye is connected with ball head structure.

In order further to realize purpose of the present invention, inner arc U-loop, two yoke plates, U-loop, prolongation ring, U-loop that described this earth terminal gold utensil string is joined by ball-eye, ring-ring connect and compose successively, ball-eye is connected with socket arrangement, ball head structure connects high-pressure side gold utensil string, the inner arc U-loop that high-pressure side gold utensil string is joined by socket-clevis eye, ring-ring, two yoke plates, U-loop, strain clamp connect and compose successively, and socket-clevis eye is connected with ball head structure.

In order to realize that further purpose of the present invention, described ball-eye adopt QP type ball-eye.

In order to realize that further purpose of the present invention, described socket-clevis eye adopt W type socket-clevis eye.

The present invention can produce following good effect compared with the prior art: the composite insulator that the present invention includes bulb, socket arrangement, its one or both ends at composite insulator are connected with ball-eye or socket-clevis eye respectively, then, ball-eye or socket-clevis eye connect two and above inner arc U-loop respectively, thereby make composite insulator gold utensil string have the axial rotation function of certain angle, in this angular range, guarantee that composite electric insulator core bar is not turned round, guarantee the mechanical performance of composite insulator, make the transmission line safe and reliable operation.

Description of drawings:

Fig. 1 is the structural representation of first kind of execution mode of overhead transmission line composite insulator strain insulator-string of the present invention;

Fig. 2 is the structural representation of second kind of execution mode of overhead transmission line composite insulator strain insulator-string of the present invention;

Fig. 3 is the structural representation of the third execution mode of overhead transmission line composite insulator strain insulator-string of the present invention.

Embodiment: preferred forms of the present invention is elaborated below in conjunction with accompanying drawing:

Embodiment 1, a kind of overhead transmission line composite insulator single conductor strain insulator-string (referring to Fig. 1), it comprises two composite insulators 1, one end of each composite insulator 1 is provided with socket arrangement 2, the other end is provided with ball head structure 3, socket arrangement 2 connects earth terminal gold utensil string, this earth terminal gold utensil string is by QP type ball-eye 4, the inner arc U-loop 12 that ring-ring joins, two yoke plates 9, U-loop 12, prolong ring 16, U-loop 12 connects and composes successively, the inner arc U-loop 12 that every pair of ring-ring joins all links to each other with two yoke plates 9, two yoke plates 9 connect a U-loop 12, U-loop 12 connects prolongation ring 16, prolong ring 16 and connect a U-loop 12 again, QP type ball-eye 4 is connected with socket arrangement 2.Ball head structure 3 connects high-pressure side gold utensil string, and high-pressure side gold utensil string is connected and composed successively by WS type socket-clevis eye 8, two yoke plates 9, U-loop 12, strain clamp 14 (holding lead), and socket-clevis eye 8 is connected with ball head structure 3.

Embodiment 2, a kind of overhead transmission line composite insulator single conductor strain insulator-string (referring to Fig. 2), it comprises two composite insulators 1, one end of each composite insulator 1 is provided with socket arrangement 2, the other end is provided with ball head structure 3, socket arrangement 2 connects earth terminal gold utensil string, this earth terminal gold utensil string is by QP type ball-eye 4, right angle link plate 15, two yoke plates 9, U-loop 12, prolong ring 16, U-loop 12 connects and composes successively, each right angle link plate 15 all links to each other with two yoke plates 9, two yoke plates 9 connect a U-loop 12, U-loop 12 connects prolongation ring 16, prolong ring 16 and connect a U-loop 12 again, QP type ball-eye 4 is connected with socket arrangement 2.Ball head structure 3 connects high-pressure side gold utensil string, high-pressure side gold utensil string is connected and composed successively by inner arc U-loop 12, two yoke plates 9, U-loop 12, the strain clamp 14 (holding lead) that W type socket-clevis eye 6, ring-ring join, the inner arc U-loop 12 that every pair of ring-ring joins all is connected with two yoke plates 9, two yoke plates 9 connect U-loop 12, U-loop 12 connects strain clamp 14, and socket-clevis eye 6 is connected with ball head structure 3.

Embodiment 3, a kind of overhead transmission line composite insulator single conductor strain insulator-string (referring to Fig. 3), it comprises two composite insulators 1, one end of each composite insulator 1 is provided with socket arrangement 2, the other end is provided with ball head structure 3, socket arrangement 2 connects earth terminal gold utensil string, this earth terminal gold utensil string is by QP type ball-eye 4, two pairs of inner arc U-loops 12 that ring-ring joins, two yoke plates 9, U-loop 12, prolong ring 16, U-loop 12 connects and composes successively, the inner arc U-loop 12 that each ring-ring joins all links to each other with two yoke plates 9, two yoke plates 9 connect a U-loop 12, U-loop 12 connects prolongation ring 16, prolong ring 16 and connect a U-loop 12 again, QP type ball-eye 4 is connected with socket arrangement 2.Ball head structure 3 connects high-pressure side gold utensil string, high-pressure side gold utensil string is connected and composed successively by inner arc U-loop 12, two yoke plates 9, U-loop 12, the strain clamp 14 (holding lead) that W type socket-clevis eye 6, ring-ring join, the inner arc U-loop 12 that every pair of ring-ring joins all is connected with two yoke plates 9, two yoke plates 9 connect U-loop 12, U-loop 12 connects strain clamp 14, and socket-clevis eye 6 is connected with ball head structure 3.

Claims

1. overhead transmission line composite insulator strain insulator-string, it comprises two composite insulators (1), an end that it is characterized in that each composite insulator (1) is provided with socket arrangement (2), the other end is provided with ball head structure (3), socket arrangement (2) connects earth terminal gold utensil string, ball head structure (3) connects high-pressure side gold utensil string, and earth terminal gold utensil string or high-pressure side gold utensil string are provided with at least two inner arc U-loops (12), and inner arc U-loop (12) ring-ring joins.

2. a kind of overhead transmission line composite insulator strain insulator-string according to claim 1, it is characterized in that inner arc U-loop (12), two yoke plates (9), U-loop (12), prolongation ring (16), U-loop (12) that described earth terminal gold utensil string is joined by ball-eye (4), ring-ring connect and compose successively, ball-eye (4) is connected with socket arrangement (2), described high-pressure side gold utensil string is connected and composed successively by socket-clevis eye (8), two yoke plates (9), U-loop (12), strain clamp (14), and socket-clevis eye (8) is connected with ball head structure (3).

3. a kind of overhead transmission line composite insulator strain insulator-string according to claim 1 is characterized in that described socket-clevis eye (8) adopts WS type socket-clevis eye.

4. a kind of overhead transmission line composite insulator strain insulator-string according to claim 1, it is characterized in that described this earth terminal gold utensil string is by ball-eye (4), right angle link plate (15), two yoke plates (9), U-loop (12), prolong ring (16), U-loop (12) connects and composes successively, ball-eye (4) is connected with socket arrangement (2), ball head structure (3) connects high-pressure side gold utensil string, high-pressure side gold utensil string is by socket-clevis eye (6), the inner arc U-loop (12) that ring-ring joins, two yoke plates (9), U-loop (12), strain clamp (14) connects and composes successively, and socket-clevis eye (6) is connected with ball head structure (3).

5. a kind of overhead transmission line composite insulator strain insulator-string according to claim 1, it is characterized in that described this earth terminal gold utensil string is by ball-eye (4), the inner arc U-loop (12) that ring-ring joins, two yoke plates (9), U-loop (12), prolong ring (16), U-loop (12) connects and composes successively, ball-eye (4) is connected with socket arrangement (2), ball head structure (3) connects high-pressure side gold utensil string, high-pressure side gold utensil string is by socket-clevis eye (6), the inner arc U-loop (12) that ring-ring joins, two yoke plates (9), U-loop (12), strain clamp (14) connects and composes successively, and socket-clevis eye (6) is connected with ball head structure (3).

6. according to claim 2 or 4 or 5 described a kind of overhead transmission line composite insulator strain insulator-strings, it is characterized in that described ball-eye (4) adopts QP type ball-eye.

7. according to claim 4 or 5 described a kind of overhead transmission line composite insulator strain insulator-strings, it is characterized in that described socket-clevis eye (6) adopts W type socket-clevis eye.