CN101588036A

CN101588036A - Electric field spacer

Info

Publication number: CN101588036A
Application number: CNA2009101491048A
Authority: CN
Inventors: M·穆尔
Original assignee: RICHARD BERGNER ELEKTROARMATUR
Current assignee: RICHARD BERGNER ELEKTROARMATUR
Priority date: 2009-06-12
Filing date: 2009-06-12
Publication date: 2009-11-25

Abstract

An electric field spacer for at least two overhead line conductors (6) comprises a connection sheet (2) which contains a head component (3) at the tail and having a holding trough (5) for the overhead line conductors (6) and at least one fixing bar (7) which is preformed spirally and respectively wound around the head component (3) and overhead line conductors in an assembly state. In order that the overhead line conductors can be reliably fixed on the electric field spacer in extreme conditions, such as short circuit, at least one stop (9) interacting with the fixing bar (7) along the longitudinal direction (10) of the connection sheet is arranged on the head component (3).

Description

Electric field spacer

Technical field

The present invention is a kind of electric field spacer that is used at least two overhead wire twisted wires, it mainly comprises brace, this brace comprises and is positioned at head member and at least one preformed hold-down bars of spirality terminal, that have the holding tank that is used for the overhead wire twisted wire, and described hold-down bars twines head member and overhead wire twisted wire under confined state.

Background technology

This type of electric field spacer has explanation in German design specification 1765951.The head member of common electric field spacer is a substantial cylindrical, is furnished with axially extended holding tank.Under confined state, the overhead wire twisted wire is twined at preformed rod of some spiralitys and two ends thereof, and the stage casing part is wrapped on the periphery of head member.The overhead wire twisted wire is fixed in the holding tank by this way.

When studying at the scene, the applicant finds that when being short-circuited, the overhead wire twisted wire may skid off from holding tank.When short circuit current raise and follow long-range navigation thatch power to raise, the overhead wire twisted wire was mutually near also raising.After the supervisory control system of overhead wire twisted wire was cut off electric current, the overhead wire twisted wire can separate under the effect of this impact fast, and the stage casing of hold-down bars is along with head member separately skids off, and the overhead wire twisted wire skids off from holding tank thereupon.

Summary of the invention

Therefore, task of the present invention proposes a kind of scheme that can both guarantee overhead wire twisted wire secure fixation under short circuit or extreme loads condition.

Above-mentioned task solves according to claim 1: a backstop is arranged on the head member, and described backstop works on brace is vertical with hold-down bars.This method can stop hold-down bars along with separately the skidding off of head member, thereby prevents that twisted wire from extracting from the clamp of electric field spacer.

In one embodiment, the projection of the hook-type that stretched out by at least one head member outer surface that twines from the rod that is fixed of backstop constitutes.This projection is preferably extended on the whole length of head member, when especially relating to extrudate.But also can consider the single projection that is distributed on the head member.A kind of preferred structure is arranged, and backstop is to be made of the inwall that vertically passes the cavity of head member along twisted wire.The hold-down bars that spirality is twined passes this hole.Therefore, have only when hold-down bars ruptures, the overhead wire twisted wire could be deviate from from clamp.But this unsafe condition has only when using several hold-down bars at the same time and just may run into.

This electric field spacer preferably is made up of an extrudate, and wherein, at least one head member and a brace link into an integrated entity.The production method of this extrudate is fairly simple.If this section bar of customized cut-off just can obtain several such electric field spacers easily.In order on the overhead wire twisted wire of different nominal length, to use this section bar, need cut brace from the center, utilize the middleware of appropriate length to connect this two half mould materials then.Can certainly directly extrude and produce this class half mould material.In other execution mode, head member is the parts that independent brace links to each other, and so just can change the size of space.Only must carry out the brace of different length earlier, to realize the size of space of different length.Advantageously, head member is designed to extrudate in this scheme.In order to reach damping effect, and reduce the wearing and tearing of head member and overhead wire twisted wire, need be at coated outside one deck elastomeric material of holding tank.The holding tank of above-mentioned common electric field spacer is a U-shaped, and the holding tank among the present invention is a V-arrangement, and it can hold cables with different diameters.

Description of drawings

Describe diagram below the present invention in detail by means of embodiment illustrated in the accompanying drawings:

The electric field spacer that Fig. 1 is made up of an extrudate is fixed with two overhead wire twisted wires above;

Fig. 2 is along the profile of the line II-II among Fig. 1;

Electric field spacer among Fig. 3 Fig. 1, its brace and head member are independent parts;

Fig. 4 is along the profile of the line IV-IV among Fig. 3;

The electric field spacer of Fig. 5 Fig. 2, the therefrom anxious back of opening of its brace connects with middleware,

Fig. 6 have with the head member shown in the corresponding profile of Fig. 2 the details drawing of another optional structure.

Embodiment

Electric field spacer 1 shown in the accompanying drawing is made up of brace 2 and two head members 3 that are fixed on the brace end.According to the embodiment of Fig. 1, electric field spacer 1 is made of an extrudate of particularly being made up of aluminium alloy, and promptly head member 3 is in one-piece connection with brace 2.According to Fig. 2 and 4, head member is half hull shape or flute profile, has a holding tank 5 vertical along it or twisted wire vertical 4 extends.Under confined state, there is an overhead wire twisted wire 6 to be arranged in holding tank 5 respectively.For overhead wire twisted wire 6 is fixed to spiral hold-down bars 7 is set on the electric field spacer 1, its two ends winding overhead wire twisted wire 6 and intermediate portion 8 are twined head members and are fixed.In that being set on the head member, at least one backstop 9 described backstop vertical 10 prevents that hold-down bars 7 breaks away from its engaging under short circuit or other influence along brace with hold-down bars 7.In other words, described at least one backstop 9 can prevent under extreme loads that from the beginning hold-down bars 7 from skidding off in the parts 3 along brace vertical 10.According to the embodiment of Fig. 1 to 5, backstop 9 is formed by the inwall that passes the cavity of head member along twisted wire vertical 4.This class cavity 12 this cavity under the situation of extrudate can be realized especially simply.For electric field spacer 1 is installed on two overhead wire twisted wires 6, at least one hold-down bars is passed cavity 12, make intermediate portion 8 be positioned at cavity 12.Then the overhead wire twisted wire is twined at the two ends of hold-down bars 7.Simple and the tool free of this installation method, but can between electric field spacer 1 and overhead wire twisted wire 6, guarantee stable connection.

Holding tank 5 all is the V-arrangement cross section in all embodiments.Therefore, it has two planar regional 13 along plane that twisted wire vertical 4 extends, and overhead wire twisted wire 6 is close to described planar zone with its periphery.Contact point between overhead wire twisted wire 6 and the plane 13 is the closer to bottom land 14, and the twisted wire diameter is just more little.The bottom land rounded bending in 14 cross sections own guarantees as far as possible little twisted wire diameter thus.For with overhead wire twisted wire 6 protectiveness be bearing in the holding tank 5, advantageously at cell wall coated outside elastomeric material 15.Can form hook plate 16 at trough rim like this, it encases the fringe region of elastomeric material 15 otch.Need not glue like this or other fixture just can be fixed elastomeric material.Only need in holding tank 5, to put into the elastic material rod of a suitable cutting, again its edge strip is inserted hook plate 16 and get final product.

In the electric field spacer 1a shown in Fig. 3 and 4, two independent head member 3a links to each other by brace 2a.Head member 3a also is the extruded hollow section bar, and it has cavity 12 equally, and hold-down bars 7 passes this cavity.Observe when assembling finishes, head member 3a goes up the cramp that two spaced-apart parallel of extending along brace vertical 10 of moulding are respectively arranged, it is passed by hole 18 respectively.When head member 3a is installed to brace 2a, head member is set on the end of brace 2a 19 holes of aiming on the cramps 17 18 with its cramp 17 up to the hole on the brace 2a.The pin 20 of in

hole

18,19, packing into.The brace 2a of selection different length can realize the twisted wire spacing of different length.If according to shown in Figure 5,2b cuts from the centre brace, again two and half braces that separate are connected with sleeve-shaped middleware 21, also can change the twisted wire spacing.

Fig. 6 has showed a kind of backstop 9 that can prevent that hold-down bars 7 from skidding off, and it is so realized, promptly only needs the edge of flute profile or half hull shape head member 3b is shaped to hook plate 22.

Brace 2 can be made by metal or plastics.The electric field spacer that is used for three and four overhead wire twisted wires needs star or cross brace 2.

List of numerals

1 electric field spacer, 2 braces, 3 heads support

Vertical 5 holding tanks of 4 twisted wires 6 trolley line twisted wires

7 hold-down bars, 8 mid portions, 9 backstops

Vertical 11 inwalls of 10 braces 12 cavitys

13 planes, 14 bottom lands, 15 elastomeric materials

16 hook plates, 17 cramps, 18 holes

19 holes, 20 pins, 21 middlewares, 22 hook plates

Claims

1. the electric field spacer (1) that is used at least two overhead wire twisted wires (6), it mainly comprises brace (2), this brace comprises and is positioned at head member (3) and at least one preformed hold-down bars of spirality (7) terminal, that have the holding tank (5) that is used for overhead wire twisted wire (6), described hold-down bars twines head member (3) and overhead wire twisted wire (6) respectively under confined state, it is characterized in that, have backstop (9) on head member (3), described backstop vertically works on (10) at brace with hold-down bars (7).

2. according to the described electric field spacer of claim 1, it is characterized in that backstop (9) is made of the projection of the hook-type that at least one head member (3b) outer surface that twines from the rod that is fixed (7) stretches out.

3. according to the described electric field spacer of claim 1, it is characterized in that (3, the wall of cavity 3a) (12) constitutes backstop (9) by passing head member along twisted wire vertical (4).

4. according to the described electric field spacer of one of claim 1 to 3, it is characterized in that brace (2) and at least one head member (3) are the parts of an integral type extrudate.

5. according to the described electric field spacer of one of claim 1 to 4, it is characterized in that brace (2b) is made up of two part braces, described part brace links to each other by middleware (21).

6. according to the described electric field spacer of one of claim 1 to 3, it is characterized in that each head member (3a) is the independent parts that link to each other with brace (2a).

7. according to the described electric field spacer of claim 6, it is characterized in that head member (3a) is an extrudate.

8. according to the described electric field spacer of one of claim 1 to 7, it is characterized in that holding tank (5) coated outside elastomeric material (15).

9. according to the described electric field spacer of one of claim 1 to 8, it is characterized in that the cross section of holding tank is a V-arrangement.