CN202167811U

CN202167811U - Arrangement structure of rigid jumper asymmetrical V-shaped insulator strings of transmission line

Info

Publication number: CN202167811U
Application number: CN2011203175809U
Authority: CN
Inventors: 张家倩
Original assignee: ANHUI ELECTRIC POWER DESIGN INSTITUTE
Current assignee: ANHUI ELECTRIC POWER DESIGN INSTITUTE
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2012-03-14
Anticipated expiration: 2021-08-26

Abstract

The utility model discloses an arrangement structure of rigid jumper asymmetrical V-shaped insulator strings of a transmission line. A rigid jumper is communicated with live ends of strain insulator strings on two sides of the line through jumper leading wires. The arrangement structure is characterized in that three jumper insulator strings are adopted to form an asymmetrical suspension structure. The arrangement structure of the rigid jumper asymmetrical V-shaped insulator strings of the transmission line is applied to the extra-high voltage and ultra-high voltage transmission line strain pole tower rigid jumper, simplifies the arrangement mode of a jumper system, saves usage of materials of power towers and insulators, simultaneously limits the rigid jumper so as to limit wind deflection of the jumper and avoids discharging accidents caused by overlarge wind deflection.

Description

The asymmetric V-type insulator string of transmission line rigid jumper arrangement

Technical field

The utility model relates to a kind of suspension type that is used for the rigid jumper system of power line tension shaft tower.

Background technology

Rigid jumper is mainly used on superhigh pressure and the UHV transmission line strain insulator shaft tower, has duplex I type insulator string to dangle usually to arrange and the duplex V-type insulator string two kinds of forms of layout of dangling.

When adopting duplex I type insulator string to arrange, under static state, the inboard wire jumper of corner is unfavorable for the lightning protection of ground wire to wire jumper away from body of the tower; Under the effect of wind load, the windage yaw swing will take place in rigid jumper, and under the strong wind operating mode, corner outside rigid jumper is prone to take place the flashover discharge near body of the tower.

The windage yaw flashover is avoided in the position that the mode that duplex V-type insulator string layout is arranged with respect to duplex I type insulator string can limit rigid jumper.Shown in Fig. 1 a, Fig. 1 b and Fig. 1 c; Rigid jumper 5 is communicated with through wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7; In the arrangement of duplex V-type insulator string; Adopt four string wire jumper insulator strings 1 symmetrical in twos V-shaped structure on perpendicular to line direction, two groups of V-structures are laterally arranging along on the line direction, in order to guarantee two groups of spacings between the V-structure; Need also promptly along line direction little cross-arm 4 be set in the outer end of body of the tower 2 and shaft tower cross-arm 3 respectively at the hanging point place of V-type insulator string.This form has increased the complexity of tower structure, also causes the increase of shaft tower material usage simultaneously.In addition, the wire jumper system adopts four insulator strings to hang, and the consumption of insulator and gold utensil is more, has increased investment.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point; The asymmetric V-type wire jumper of a kind of transmission line rigid jumper insulator string arrangement is provided, is applied to superhigh pressure and UHV transmission line strain insulator shaft tower rigid jumper, in the hope of simplifying the arrangement of wire jumper system; Practice thrift shaft tower and insulator material usage; Simultaneously rigid jumper is carried out spacingly,, avoid the discharge accident that causes because of windage yaw is excessive with restriction wire jumper windage yaw.

The utility model adopts following technical scheme for the technical solution problem:

The asymmetric V-type insulator string of the utility model transmission line rigid jumper arrangement; Rigid jumper is communicated with through the live end of wire jumper lead-in wire with circuit both sides strain insulator string, and its design feature is: adopt three wire jumper insulator strings to form the asymmetry suspended structure;

Being set to of said asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string is fixed on the link position place of shaft tower cross-arm and body of the tower, and the lower end is fixed on the point midway place of rigid jumper; The upper end of other two two side wire jumper insulator strings is separately fixed at shaft tower cross-arm end along on two hanging points of line direction, and the lower end is separately fixed at the both sides of rigid jumper, and said two two side wire jumper insulator strings are parallel each other or are " eight " shape;

The setting of said asymmetry suspended structure or be: wherein list upper end of propping up side wire jumper insulator string is fixed on the outer end of shaft tower cross-arm, and the lower end is fixed on the point midway place of rigid jumper; The upper end of other two two side wire jumper insulator strings is separately fixed on suitable two hanging points of line direction of shaft tower cross-arm and body of the tower junction; The lower end is separately fixed at the both sides of rigid jumper, and said two two side wire jumper insulator strings are parallel each other or are " eight " shape.

Compared with present technology, the utility model beneficial effect is embodied in:

1, the utility model has kept double V-shaped structure in restriction rigid jumper position, avoids windage yaw flashover discharge aspect than two I type structural advantages, has also kept under the situation of identical ground wire cross-arm length simultaneously, and ground wire is to the less advantage in lead lightning protection angle.

2, the utility model under the prerequisite of the structural stability that does not reduce the wire jumper system, has been simplified the arrangement of wire jumper system than existing double V-shaped structure, has reduced the usage quantity of wire jumper insulator string and gold utensil.

3, the utility model has been cancelled the little cross-arm of shaft tower body of the tower and cross-arm end than existing double V-shaped structure, and can the shaft tower cross-arm be designed to Duckbill type, has simplified the structure of shaft tower cross-arm, has reduced the shaft tower rolled steel dosage simultaneously.

4, the utility model is than existing double V-shaped structure, and the shaft tower cross-arm is simple in structure, and wire jumper system material consumption reduces few, has reduced the construction and installation workload.

5, the utility model can use the wire jumper insulator string of different materials such as porcelain, glass or synthetic insulating material applicable to the rigid jumper of different types such as mouse-cage type, aluminum pipe type.

6, two two side wire jumper insulator strings of the utility model can be applicable to the cross-arm width of different strain insulator shaft towers and the coupling of rigid jumper length through the size of " eight " word opening is adjusted.

Description of drawings

Fig. 1 a is that double V-shaped layout master looks sketch map in the prior art;

Fig. 1 b is the schematic side view of scheme shown in Fig. 1 a;

Fig. 1 c is the schematic top plan view of scheme shown in Fig. 1 a;

Fig. 2 a looks sketch map for the utility model master;

Fig. 2 b is the schematic side view of scheme shown in Fig. 2 a;

Fig. 2 c is the schematic top plan view of scheme shown in Fig. 2 a;

Fig. 2 d is the schematic top plan view of another execution mode of the utility model;

Label among the figure: 1 wire jumper insulator string; 2 bodies of the tower; 3 shaft tower cross-arms; 4 little cross-arms; 5 rigid jumpers; 6 wire jumpers lead-in wire; 7 strain insulator strings; 8 single side wire jumper insulator strings; 9 pairs side wire jumper insulator strings.

Embodiment

Embodiment 1:

The asymmetric V-type insulator string of transmission line rigid jumper arrangement is in the present embodiment: press usual manner; Rigid jumper 5 is communicated with through wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7, and different is prior art in the present embodiment: adopts three wire jumper insulator strings composition asymmetry suspended structures.

Referring to Fig. 2 a, Fig. 2 b and Fig. 2 c, being set to of asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string 8 is fixed on the link position central spot of shaft tower cross bar 3 and body of the tower 2, and the lower end is fixed on the point midway place of rigid jumper 5; The upper end of other two two side wire jumper insulator strings 9 is separately fixed at the end of shaft tower cross-arm 3 along on two hanging points of line direction, and the lower end is separately fixed at the both sides of rigid jumper 5, and two outside insulator strings 9 are parallel each other or are " eight " shape.

Embodiment 2:

Identical with embodiment 1 is: present embodiment is that rigid jumper 5 is communicated with through wire jumper lead-in wire 6 live ends with circuit both sides strain insulator string 7 by usual manner; Different is that the asymmetry suspended structure that three wire jumper insulator strings are formed is shown in Fig. 2 d for present embodiment and embodiment 1; Wherein list upper end of propping up side wire jumper insulator string 8 is fixed on the central spot of the outer end of shaft tower cross-arm 3, and the lower end is fixed on the point midway place of rigid jumper 5; The upper end of other two two side wire jumper insulator strings 9 is separately fixed on suitable two hanging points of line direction of shaft tower cross-arm 3 and body of the tower junction; The lower end is separately fixed at the both sides of rigid jumper 5, and two two side wire jumper insulator strings 9 are parallel each other or are " eight " shape.

The wire jumper insulator string can the various compound modes of various materials (porcelain, glass, synthetic material), and (single and many or multi-disc are connected into a string) formed.

Installation process:

To the extra high voltage direct current transmission line strain tower, adopt the squirrel-cage rigid jumper.

By conventional construction plan, accomplish the stringing construction of circuit both sides, and strain insulator string 7 is installed;

With rigid jumper 5 suspensions, different according to the pattern of rigid jumper, the hitch point of two side wire jumper insulator strings 9 on rigid jumper 5 is positioned at 0.1L～0.25L place apart from the rigid jumper end with two side wire jumper insulator strings 9, and L wherein is a rigid jumper length.

Carry out with 8 pairs of rigid jumpers of single side wire jumper insulator string 5 spacing, make rigid jumper 5 be fixed in shaft tower cross-arm 3 under, the hitch point of single side wire jumper insulator string 8 on rigid jumper 5 is positioned at the point midway of rigid jumper 5.

For freestanding rigid jumper system, utilize wire jumper lead-in wire 6 that the rigid jumper end is connected with the wire clamp exit of strain insulator string 7 and fix; For the rigid jumper system of stent-type, the buttock line of rigid jumper two ends reservation is mounted on the wire clamp exit of strain insulator string 7 as wire jumper lead-in wire 6 and with the end of buttock line.

Rigid jumper can adopt various ways such as aluminum pipe formula, squirrel-cage, rigid support posture.

Claims

1. the asymmetric V-type insulator string of transmission line rigid jumper arrangement; Rigid jumper (5) is communicated with through the live end of wire jumper lead-in wire (6) with circuit both sides strain insulator strings (7), it is characterized in that: adopt three wire jumper insulator strings to form the asymmetry suspended structure; Being set to of said asymmetry suspended structure: wherein list upper end of propping up side wire jumper insulator string (8) is fixed on the link position place of shaft tower cross-arm (3) and body of the tower (2), and the lower end is fixed on the point midway place of rigid jumper (5); The upper end of other two two side wire jumper insulator strings (9) is separately fixed at shaft tower cross-arm (3) end along on two hanging points of line direction; The lower end is separately fixed at the both sides of rigid jumper (5), and said two two side wire jumper insulator strings (9) are parallel each other or are " eight " shape.

2. the asymmetric V-type insulator string of transmission line rigid jumper arrangement; Rigid jumper (5) is communicated with through the live end of wire jumper lead-in wire (6) with circuit both sides strain insulator strings (7), it is characterized in that: adopt three wire jumper insulator strings to form the asymmetry suspended structure; The setting of said asymmetry suspended structure or be: wherein list upper end of propping up side wire jumper insulator string (8) is fixed on the outer end of shaft tower cross-arm (3), and the lower end is fixed on the point midway place of rigid jumper (5); The upper end of other two two side wire jumper insulator strings (9) is separately fixed on suitable two hanging points of line direction of shaft tower cross-arm (3) and body of the tower (2) junction; The lower end is separately fixed at the both sides of rigid jumper (5), and said two two side wire jumper insulator strings (9) are parallel each other or are " eight " shape.