CN103928201A

CN103928201A - Medium-voltage Supporting Insulating Part

Info

Publication number: CN103928201A
Application number: CN201410005740.4A
Authority: CN
Inventors: J-F.托托里奇; D.科克; P.内温格; F.贝拉登戈
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE; Schneider Electric Industries SAS
Priority date: 2013-01-11
Filing date: 2014-01-07
Publication date: 2014-07-16
Anticipated expiration: 2034-01-07
Also published as: EP2755212A1; FR3001080B1; ES2547346T3; EP2755212B1; FR3001080A1; CN103928201B

Abstract

A supporting insulating part comprises a main body (1), an end part region (2, 3) in which a recess (10) possessing a side opening (12) used for accommodating metal insertion members (5) is arranged. The insertion members are inserted after being manufactured, and are kept by screwing forces without needing to fasten the insertion members (5) in the main body (1). The manufacture is simplified, and the supporting insulating part is easy to recover when being exhausted. The medium-voltage supporting insulating part is used in an electrical device, and especially used in the devices possessing shells and used for supporting medium-voltage conductors.

Description

Middle hydraulic support insulating part

Technical field

The present invention relates to a kind of electric supporting insulating part, during such electric supporting insulating part is designed at least resist, presses and maintain the separation between two conductive components under different potentials.

Background technology

Conductive component can be its housing of electric conductor and the atmosphere electric equipment that belongs to confirmation, and they are connected to the opposed end of supporting insulating part by screw or similar device.Supporting insulating part is equipped with the female metal insert that wherein inserts screw, and these metal inserts are by being embedded in the insulating body that forms supporting insulating part major part, by being maintained around molded this main body of these inserts.

For the material of molded supporting insulating part main body normally epoxy resin or other thermosetting polymer, although thermoplastic be also suggested, particularly in file WO2011/023721A.Nonetheless, Overmoldedly make to be difficult to separated insert and main body, thereby compromise in be easy to reclaim its possibility after supporting insulating part completes useful life.Be difficult to or irretrievable this shortcoming because adopting thermosets to become even more obvious.Another complaint about existing design is that they are very heavy.

Summary of the invention

The object of the invention is to simplify the manufacture process of these supporting insulating parts, first by eliminating Overmolded insert, to allow described main body and insert to manufacture separately, is to be easy to reclaim subsequently.Described insert can be assembled to main body in simple but complete lasting mode.In certain embodiments, described insert even can be omitted entirely, and then described supporting insulating part only consists of main body.The light structures of main body and good electric insulation quality are completely possible.

In general type, the present invention relates to the supporting insulating part of the above-mentioned type, comprise the main body of being made by polymer, with two relative end regions of the longitudinal direction along described main body, it comprises the device of end that described main body is fastened to the device of described parts for holding, for the described device holding, comprise and be provided with the recess that is based upon the main opening on described main body side, described main body side connects described end regions, and defined by dividing plate with holes, described hole is used for by the described shank for fastening device and for keeping the described jag for fastening device.

As previously described, fastener generally includes screw or bolt.As the case may be, recess can hold nut, screw head or with the similarly additional insert of the similar form of nut, they insert by lateral openings.Thread handle passes the opening in dividing plate and jag is remained in recess.The present invention still can use together with having any other fastener of similar type of the shank that ends at jag.

For this general restriction, can carry out multinomial improvement.Therefore recommend, main body is made by thermoplastic polymer, thereby it is recycled at an easy rate.

In the design of some, supporting insulating part comprises metal insert, and it is inserted in described recess and holds fastener, forms the outstanding end of described device simultaneously.Then insert these metal inserts, do not have Overmolded, and therefore subsequently can be at an easy rate with the body portion of insulating part from.By comprising the protrusion in the corresponding aperture that enters main body external partition, to insert is remained on to fixed position, they can be advantageously associated with it.

In addition, insert can be by tapping to be fastened to screw, or be provided with the die cavity of nut, fastener.

Generally speaking, main body preferably can be configured with rib structure, to it is lightened, and can significantly not reduce its machinery or dielectric strength, and this will give the credit to the continuity of relief and rib, and this makes to stop electric field and extends arc line; In addition, this solution makes to avoid the thermoplastic of large thickness in the core of material, to produce porous type flaw.It can also comprise the longitudinal rib that connects end regions, and described rib is parallel to the principal spread direction of main body.These ribs preferably radially.They can be from the central axis of main body with different distance branches out, completely coalescent and gather material at center to prevent them, may cause molded defect.Described main body can also comprise the cross rib perpendicular to its principal spread direction, and its Main Function is to provide medium and separates, when they exist, makes longitudinal rib to strengthen and extend thread cast-off.Described main body at least even can form by grid completely longitudinal by these and cross rib between described end regions, and wherein said recess will apply slightly different structure.

Equally advantageously, described rib has constant and identical thickness, so that manufacture described main body by molded.

Described end regions can comprise except the continuous perisporium the main opening of recess.These preferably have the angular deflection between an end regions and another end regions, are also here for reducing the object of electric arc risk.

Described recess is defined by end wall.Advantageously, when insert is provided, they separate with constant gap with these walls.

Accompanying drawing explanation

Accompanying drawing by below, illustrates to various aspects of the present invention in further detail:

-Fig. 1 shows the general view of supporting insulating part,

-Fig. 2 and 3 is two viewgraph of cross-section,

-Fig. 4 shows the view of one of insert, and

-Fig. 5 shows another embodiment that is not with insert.

Embodiment

Supporting insulating part of the present invention consists of cylinder or cone shape main body 1 substantially, comprises two end regions 2 and 3 and zone line 4 that they are separated.End regions 2 and 3 aligns with the central axis of main body 1, and it limits the longitudinal extension direction of main body 1.End regions 2 and 3 is designed to by screw or bolted to conductive component (not shown), and has for being connected to the insert 5 of described conductive component, as isolated and illustrate in Fig. 4.They have the axle bush of general shape, particularly radial configuration, to reduce electric field, and are included in three protrusions 6 on tabular surface 7.As seen in Fig. 2, they also comprise for the close-fitting center of the thread handle with belonging to fastener internal thread hole 8, and nut die cavity 9, and it is arranged to relatively above-mentioned tabular surface 7, if needed, it is for holding the nut that belongs to fastener.Insert 5 is placed in the recess separately 10 of end regions 2 and 3.Recess 10 is the outside lateral opening towards main body 1 by opening 12, opening 12 through be placed in end regions 2 with 3 each surrounding and also continue into the perisporium 11 of a circle.Each is by being connected to the end wall 13 of sidewall 11 in its end and defining by being positioned at the smooth porous barrier 14 in the respective end of main body 1 along its longitudinal extension direction.The tabular surface 7 of insert 5 is placed in to be hollowed out with porose 15 and allows by the porous barrier 14 of fastener thread handle.Porous barrier 14 is also provided with for holding the hole of protrusion 6, and this makes insert 5 to be remained on to the appropriate location in its recess 10.Then, insert 5 is concentric with end wall 13, and leaves uniform gap (except near opening 12), and it allows to obtain at insert 5 also uniform electric field around.Insert 5 and the recess 10 that can have arbitrary number, this depends on the needs of the supporting that will complete.Here, end regions 2 comprises single central insert 5, and region, the other end 3 comprises two bias and relative insert 5.This species diversity has explained why end regions 2 and 3 why is taper with the zone line 4 that is connected them if having different radiuses here, but this is not essential feature of the present invention.

Internal rib 16 is connected to each other end wall 13 and is connected to perisporium 11.In them one center in main body 1 extends to larger end regions 3, and is defined for the inlet 17 of manufacturing main body 1.

4 of the zone lines of main body 1 consist of rib grid, and longitudinal rib 18 extends and interconnects end regions 2 and 3 on the principal spread direction of main body 1, and cross rib 19 is crossed as above-mentioned and arranges regularly; Alternately, if mechanical strength can reduce safely, can only there is two or four rib.Longitudinal rib 18 is radially, but has the labyrinth that can see in Fig. 3: in fact, they from the central axis of main body 1 with different distance branches out.Can find out four diagonal ribs 18a, 18b, 18c and 18d, four other ribs 18e, 18f, 18g and 18h, with aforementioned equal angles interval at 45 °, but they are only in relative Lei18aHe 18c top set, but keep separating with other rib 18b and 18d, and they therefore can be towards the center of this structure; Each in these ribs 18e to 18h branches into rectangular paired rib 18i and 18j, with the sizable distance of distance center, is parallel to respectively one of lucky rib 18a and 18c and one of lucky rib 18b and 18d.This radially but in irregular structural entity, there is more or less thickness uniformly, this has reduced the risk of polymer molding defect.A large amount of ribs has increased the intensity of main body 1 in conjunction with its good regular layout.

Cross rib 19 is circular and continuous, and they also create relief around at zone line 4.

Their Main Function is increase the quantity of the dielectric wall between insert under different potentials and extend the thread cast-off (leakage line) between different potentials lower conductor.

All ribs 18 and 19 have identical, constant thickness.For preventing from forming last precautionary measures that accidental arcs takes, at one end in the angular deflection between the opening 12 of the recess 10 between portion region 2 and region, the other end 3, finding out, is here 90 °, to apply longer spiral path on electric arc.

Some other embodiment will describe by Fig. 5.Insert 5 is not for main body 1 being fastened to the necessary device of the conductive component that comprises plain screw 20.Screw 20 inserts recess 10, and its shank 21 is through hole 15, and the head 22 of screw 20 remains in recess 10.As variant, tapping screw can be used for forming hole by initial continuous poriferous dividing plate 14 15 itself.Then obtain identical layout.The height of recess 10 is selected to and allows this screw 20 to insert.By screw 20, keep and be schematically shown with the conductive component 23 being bearing on porous barrier 14.Other conductive components will be positioned in an identical manner with respect to the region, the other end of supporting insulating part.

Main body 1 in special-purpose mould by thermoplastic molded manufacture, first melted material is being injected in inlet 17 towards end regions 2 and before radially outwards flowing vertically, can not run into any real obstacle or the narrow passage that may bring manufacturing defect: contrary, can expect progressive, quite rapid and uniform foundry goods.Insert 5(is when they exist) respectively by casting or machine work by metal, manufactured separately, once and subsequently main body from mould, remove and be just installed in main body 1.

Claims

1. one kind is supported insulating part, be used at least under medium voltate, under different potentials, two conductive components are separated, comprise the main body (1) of being made by polymer, relative two end regions (2 in the longitudinal extension direction of described main body, 3), it comprises the device for holding, describedly for the device holding, hold the end for fastening device, describedly for fastening device, described main body (1) is fastened to described parts, it is characterized in that, describedly for the device holding, comprise recess (10), it is provided with and is based upon the main opening (12) on the described main body side that connects described end regions and is defined by porous barrier (14), described porous barrier (14) is for by the described shank for fastening device and for keeping the described jag for fastening device.

2. supporting insulating part according to claim 1, is characterized in that, described main body (1) is made by thermoplastic polymer.

3. supporting insulating part according to claim 1 and 2, is characterized in that, it comprises metal insert (5), and described metal insert (5) is inserted in recess (10), there is no Overmolded described main body, and holds described for fastening device.

4. supporting insulating part according to claim 3, is characterized in that, described insert is provided with the protrusion (6) in the respective aperture that is pressed into described dividing plate.

5. supporting insulating part according to claim 3, is characterized in that, described insert is provided with the internal thread hole (8) that will be secured to the described screw for fastening device.

6. according to the supporting insulating part described in claim 3 or 5, it is characterized in that, described insert is provided with for the described nut die cavity (9) for fastening device.

7. supporting insulating part according to claim 1 and 2, is characterized in that, described main body comprises the longitudinal rib (18) that connects described end regions and be parallel to described main body principal spread direction.

8. supporting insulating part according to claim 7, is characterized in that, described longitudinal rib is radially.

9. supporting insulating part according to claim 8, is characterized in that, described longitudinal rib from the central axis of described main body with different distance branches out.

10. supporting insulating part according to claim 1 and 2, is characterized in that, described main body comprises perpendicular to the cross rib of described main body principal spread direction (19).

11. according to the supporting insulating part described in claim 7 and 10, it is characterized in that, it consists of the longitudinal and cross rib between described end regions completely.

12. supporting insulating parts according to claim 11, is characterized in that, described rib has identical and constant thickness.

13. supporting insulating parts according to claim 1 and 2, is characterized in that, described end regions (2,3) comprises the continuous perisporium (11) except the main opening in described recess (10) (12).

14. supporting insulating parts according to claim 1 and 2, is characterized in that, the main opening of described recess (12) has between one of described end regions and another, about the angular deflection of the principal spread direction of described main body.

15. supporting insulating parts according to claim 3, is characterized in that, described recess has the end wall (13) that separates constant clearance with insert (5).