CN101740259A - Overmoulding for vacuum bulb - Google Patents

Overmoulding for vacuum bulb Download PDF

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Publication number
CN101740259A
CN101740259A CN200910136434A CN200910136434A CN101740259A CN 101740259 A CN101740259 A CN 101740259A CN 200910136434 A CN200910136434 A CN 200910136434A CN 200910136434 A CN200910136434 A CN 200910136434A CN 101740259 A CN101740259 A CN 101740259A
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CN
China
Prior art keywords
intermediate layer
vacuum switch
switch chamber
textle layers
individual
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Pending
Application number
CN200910136434A
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Chinese (zh)
Inventor
让-弗朗索瓦·托尔托里奇
迈赫达德·哈桑扎德
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Grid Solutions SAS
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Areva T&D SAS
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Publication date
Application filed by Areva T&D SAS filed Critical Areva T&D SAS
Publication of CN101740259A publication Critical patent/CN101740259A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

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  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention relates to an overmouding for a vacuum bulb (6), that includes an intermediate layer (4) and an overmoulding layer (5) both used for electrically insulating the vacuum bulb, wherein the intermediate layer is to be provided around the vacuum bulb between said vacuum bulb and the overmoulding layer, wherein the intermediate layer consists of a homogenous composite including n textile layer(s), n being no lower than 1, and a first insulating polymer for impregnating and covering said n textile layers, the overmoulding layer is made of a second insulating polymer, and the intermediate layer has a constant thermal expansion coefficient situated between the thermal expansion coefficients of the bulb and of the overmoulding layer and is the only layer in the overmoulding that comprises one or more textile layers.

Description

A kind of overmoulding for vacuum bulb
Technical field
The present invention relates to that (or post forming overmolding) provides the electric insulation of vacuum switch chamber (vacuum switch chamber) by the secondary molding.
Background technology
Vacuum switch chamber is that the electric current that is used for high pressure or medium-voltage switchgear and equipment at present cut-offs assembly (assembly that opens circuit, breaking component).
Usually, the main body that is used for the vacuum switch chamber of high pressure or pressure is made by ceramic material, and the end of main body prolongs by metal part (being made by copper, stainless steel etc.) on length.Then by making its electric insulation with shell covering vacuum switch cavity, this shell is molded on the chamber (being the secondary molding) and is made by the solid-state synthetic material of insulation, and this material is made of the polymeric material of thermosetting or thermoplasticity or elastic type usually.
At last, the material that is used to prepare the vacuum switch chamber of secondary molding has very different thermal coefficient of expansions.In this, the thermal coefficient of expansion of ceramic material is about 7.5 * 10 -6/ ℃, the thermal coefficient of expansion of copper is about 17 * 10 -6/ ℃, stainless thermal coefficient of expansion is about 11 * 10 -6/ ℃, and the material coefficient of thermal expansion coefficient that is used for molded plastic shell (molded skin) is respectively about 35 * 10 for the polymer of thermosetting, thermoplasticity or elastic type -6/ ℃ or 100 * 10 -6/ ℃ or 100 * 10 -6/ ℃ to 300 * 10 -6/ ℃ scope in.
Therefore, in use, when the vacuum switch cavity stands variations in temperature (for example because extreme ambient temperature), and when standing thermal effect or standing thermal shock (because excursion, power delivery etc.), can appear in the interface zone in the material or between the material such as the fault of peeling off or ftractureing.This damage mainly is owing to the differential expansion between the different materials of the vacuum switch chamber of preparation secondary molding, and this differential expansion causes the swell increment that various materials are different and produce stress that this stress can cause that again damage takes place.
For these faults are minimized, knownly elastomeric layer (for example ethylene propylene diene rubber) can be inserted into (referring to document [1]) between vacuum switch chamber and the molded plastic shell.
Another kind of known solution is included in and places one group of bilayer between vacuum switch chamber and the molded plastic shell, promptly interior textle layers and outer textle layers (referring to document [2]).Interior textle layers contacts with vacuum switch chamber itself, and has high textile material density and low thermal coefficient of expansion.About outer textle layers, it contacts with molded plastic shell; It has the textile density (textile density) (that is, the spacing between the yarn is greater than interior textle layers) that is lower than interior textle layers, and it has the thermal coefficient of expansion that is higher than interior textle layers.
This second kind of solution has practicality, and this is that its result is to make the difference of the thermal coefficient of expansion between the material to minimize because it makes the thermal coefficient of expansion in the composite bed to gradually change.
Yet, make such shortcoming that composite bed had and be, its complexity and cost height.In this, because the variation step by step of the textile density between interior textle layers and outer textle layers, the placement of interior textle layers and outer textle layers and manufacturing are complicated.
Therefore, the present inventor has managed to design a kind of method that reduces the secondary molding of the difference between the vacuum switch chamber material coefficient of thermal expansion coefficient, and this method does not have shortcoming discussed above.
Summary of the invention
Thus, the invention provides a kind of secondary moulded work (overmolding) that is used for vacuum switch chamber, this secondary moulded work comprises intermediate layer and molded plastic shell, both are vacuum switch chamber electric insulation are provided, and this intermediate layer is suitable for being arranged on around the vacuum switch chamber, between vacuum switch chamber and the molded plastic shell.
This intermediate layer is made by homogeneous composite material, and it comprises nIndividual textle layers (wherein nMore than or equal to 1) and the dipping and cover described nFirst insulating polymer of individual textle layers; And
Described molded plastic shell is made by second insulating polymer;
This secondary moulded work is characterised in that, this intermediate layer has constant thermal coefficient of expansion, the scope of this thermal coefficient of expansion is between the thermal coefficient of expansion of vacuum switch chamber and molded plastic shell, and this intermediate layer is unique layer that comprises at least one textle layers in the secondary moulded work.
The intermediate layer of secondary moulded work of the present invention is a kind of homogeneous composite material, and this composite material has the constant coefficient of expansion and forms the intermediate layer that makes the vacuum switch chamber electric insulation.In practice, the thermal coefficient of expansion in intermediate layer is constant on macro-scale, and on micro-scale, other positions do not exist owing to exist fiber in some position, the coefficient of expansion in intermediate layer changes, thereby be not constant, but because this variation repeats in each textle layers in an identical manner, the final coefficient of expansion that obtains but is constant on macro-scale.
Preferably, this molded plastic shell and intermediate layer also are used to keep the mechanical strength of vacuum switch chamber.Therefore, advantageously, the insulating polymer in this molded plastic shell and intermediate layer also is selected from those makes vacuum switch chamber can mechanically obtain the composition of excellent support.
The intermediate layer nIndividual textle layers limits and (or forms the define) three-dimensional network of fiber.If only there is a textle layers in the intermediate layer, then the fiber of this textle layers must limit a kind of three-dimensional network.This textle layers can for example be the three dimensional fabric of mat or felt pan form.
It should be noted, should nIndividual textle layers can be wound on around the switch cavity, and perhaps they can cover the outside of switch cavity and be provided with, and wherein, they are tubular shell (sleeves) or sleeve (socks) form.
Advantageously, this intermediate layer nIndividual textle layers one deck is stacked on another layer, the constant distance in interval between each layer and the following layer.
Advantageously, intermediate layer nEach layer in the individual textle layers all parallel fibers of the parallel fibers by making first series with non-zero angle and at least a second series interweaves and forms.
Preferably, intermediate layer nEach layer in the individual textle layers all parallel fibers by making first series with about 90 ° angle and at least a second series parallel fibers interweaves and forms. nIndividual textle layers for example can weave and form.
Advantageously, in each textle layers in intermediate layer, the spacing between the adjacent fiber in the fiber of same train (pitch) is constant.By this way, the mesh of acquisition rule (or mesh, mesh).The spacing of the first serial fiber can be identical with the spacing of second series fiber.So obtain to have the textle layers of square mesh.
Advantageously, intermediate layer nIndividual textle layers has identical composition and identical density.Should nIndividual layer is made by fiber.These fibers can be natural fiber or synthetic fibers or mineral fibres.They for example can be string or chemical fibre.
In first kind of modification, the intermediate layer nIndividual textle layers is made by glass fibre.
In second kind of modification, the intermediate layer nIndividual textle layers is made by polyester fiber.
In the third modification, the intermediate layer nIndividual textle layers is made by string.
Advantageously, this intermediate layer nIndividual textle layers is equidistant, and vertically (that is, is being parallel to each other by this way nThe direction on the plane of layer) skew makes nLayer is being parallel to nProjection on the common plane on the plane of individual textle layers (projection) produces wherein, and the spacing between the parallel fibers is constant layer.Arranging with regular array like this should nIndividual layer makes it possible to obtain a kind of three-dimensional network, wherein, distributes to first insulating polymer and is used for it is penetrated into nIn the individual textle layers mesh is regular at interval. nIndividual textle layers is skew each other by this way in fact, makes to help first insulating polymer to flood.Therefore this first insulating polymer can be penetrated into rule and easy mode nIn the individual textle layers, the compound that this produces a kind of homogeneous and has constant cte.
Advantageously, this first insulating polymer is identical insulating polymer with second insulating polymer.
Preferably, to have scope be 0.2 millimeter (mm) thickness to 20mm in the intermediate layer.
The present invention also provides a kind of vacuum switch chamber with secondary moulded work as mentioned above (overmolding).
At last, the invention provides a kind of method that makes vacuum switch chamber secondary molding (or post forming), wherein, adopt at least two textle layers.This method may further comprise the steps:
A) on vacuum switch chamber, form intermediate layer (in practice, this intermediate layer coats vacuum switch chamber itself); And
B) on the intermediate layer, form molded plastic shell;
This intermediate layer and molded plastic shell are used to make the vacuum switch chamber electric insulation;
The method is characterized in that step a) comprises:
-on vacuum switch chamber, deposit nThe individual textle layers that piles up, nFor more than or equal to 2 integer, should nThe constant spacing of individual textle layers each interval, and by this way each other skew make k textle layers the rectangle reference frame (frame of reference) that is attached to (k-1) the individual textle layers below (attached to) (O, i, j) direction iLast deviant 1/n and in direction jLast deviant 1/n, kBe scope be 2 to nInteger; And
The layer of-deposition first insulating polymer, thus flood and cover described nIndividual textle layers;
The feature of-this method is that also the molded plastic shell that forms is made by second insulating polymer in step b).
Advantageously, second insulating polymer of first insulating polymer in intermediate layer and molded plastic shell is mutually the same.
Description of drawings
The present invention may be better understood by reading following detailed description, and can present its further advantage and feature, and these descriptions provide in conjunction with the accompanying drawings by indefiniteness embodiment, wherein:
Fig. 1 is the sectional view that has according to the vacuum switch chamber of secondary moulded work of the present invention;
Fig. 2 illustrates respectively as the thermal linear expansion coefficient (CTE) (representing with solid line) of the function of the radial position of the vacuum switch chamber outside of secondary molding of the present invention and the diagram of weaving content (being represented by dotted lines);
Fig. 3 a shows an example of the layout of three textle layers, and described three textle layers are stacked by this way, make after adding insulating polymer, and they form homogeneous composite interlayer of the present invention; And
Fig. 3 b is the decomposed form (exploded version) of Fig. 3 a.
Embodiment
The vacuum switch chamber 1 of secondary molding of the present invention is shown among Fig. 1.Should be noted that the element that constitutes the vacuum switch chamber of secondary molding shown in Figure 1 is not drawn in proportion.
Vacuum switch chamber 6 is electrically connected 3 formations by two that are enclosed in the hermetically sealed case (casing) 2.
This overcoat 2 is made by the insulating material that is generally ceramic material.About being electrically connected 3, it is made by the electric conducting material such as copper.
In the present invention, vacuum switch chamber 6 is secondary moldings, and surround by composite interlayer 4, composite interlayer 4 by pile up each other and regularly spaced each other textle layers for example glass layer constitute, these textle layers are impregnated with first insulating polymer (it for example can be insulating resin or more specifically be epoxy resin).
Intermediate layer 4 is covered by molded plastic shell 5 successively, and this shell 5 forms by the secondary molding and is made of second insulating polymer (being the solid-state synthetic material of electric insulation, such as insulating resin).The insulating resin that is used to prepare composite interlayer is preferably the insulating resin identical with being used to prepare molded plastic shell 5.Therefore, can carry out the dipping in intermediate layer 4 and the formation of molded plastic shell 5 advantageously in the single operation process of injecting insulating polymer.
Form a kind of compound so be impregnated with the textle layers of insulating polymer (for example insulating resin) in polymer sclerosis back.
The insulating polymer that is used to prepare composite interlayer of the present invention can be the solid-state synthetic material of any suitable electric insulation, the solid-state synthetic material of described electric insulation can flood textle layers and can harden so that form insulating intermediate layer, the somewhere of the Coefficient of Thermal Expansion value that this insulating intermediate layer has between molded plastic shell material and vacuum switch chamber material coefficient of thermal expansion coefficient.Preferably, select the composition of textle layers and the composition of first insulating polymer like this, the Coefficient of Thermal Expansion value that makes the intermediate layer that obtained have is that (referring to Fig. 2) located in the about centre position between the material coefficient of thermal expansion coefficient value of vacuum switch chamber and molded plastic shell.
First insulating polymer 4 (for example insulating resin) that is used to prepare the intermediate layer can be identical with the insulating polymer that is used to prepare molded plastic shell.
This textle layers is the piece of cloth of being made by mineral fibres, string or synthetic fibers.They for example can be made by glass fibre.
The two dimension textle layers passes through braided fiber in a usual manner, promptly the fiber (weft yarn) of the fiber (warp thread) by making first series on common plane (or copline, common plane) and the second series that is provided with non-zero angle with respect to the fiber of first series interweaves and makes.The fiber of this first series preferably meets at right angles with the fiber with respect to second series and is provided with.
Except the fiber of above-described first and second series, the three-dimensional woven layer of 3 D weaving fabric type also comprises the parallel fibers of at least one tertiary system row, and it interweaves with the plane that fiber limited by first and second series.
The manufacturing of two kinds of modification of secondary moulded work of the present invention is described subsequently.
In these two kinds of modification, vacuum switch chamber is about 8 * 10 by thermal coefficient of expansion -6/ ℃ ceramic material (aluminium oxide ceramics for example, Al 2O 3) make, and molded plastic shell is about 36 * 10 by thermal coefficient of expansion -6/ ℃ insulating polymer (it for example can be the thermosetting resin such as bisphenol epoxy or cycloaliphatic epoxy resin, will explain below) make.
In first kind of execution mode, the insulating resin that is used to prepare molded plastic shell is the bisphenol epoxy that is filled with 60% silica flour.If desired, can make the silica flour silanization.
As for the intermediate layer, it is the compound that is made of the four-layer glass fiber textile material that is impregnated with above-mentioned bisphenol epoxy.
The intermediate layer that insulating resin sclerosis back is obtained has the average thickness of about 1.8mm.
Here employed glass fiber textile layer for example be about respectively with 0 ° and 90 ° angle orientation the axle the twin shaft two-dimensional fabric.Employed glass fiber textile can for example be by supplier Chomarat preparation and have every square metre 520 gram weight (g/m 2) the product that is called " Tissu Roving 500T " [500T Roving fabric].
In second kind of form (version), the insulating polymer that is used to prepare molded plastic shell is the cycloaliphatic epoxy resin that is filled with 66% silica flour.If desired, can make the silica flour silanization.
The intermediate layer compound that the triplex glass fiber textile material that is impregnated with above-mentioned cycloaliphatic epoxy resin constitutes of serving as reasons.
The intermediate layer that insulating resin sclerosis back is obtained has the average thickness of about 1.3mm.
Here employed glass fiber textile for example be about respectively with-45 ° and+45 degree orientation the axle the twin shaft two-dimensional fabric.Employed glass fiber textile can be for example for having 560g/m 2The E glass fibre of weight is for example by supplier A﹠amp; The SILASOX V29L250X of PTechnology preparation.This glass fiber textile for example can promptly can exist around the tight cylindrical shape that is provided with of vacuum switch chamber with sleeve (sock) form.
Can pass through will nIndividual textle layers is placed on the vacuum switch chamber, is poured on or is infused in by the insulating polymer with liquid form then nIndividual layer is gone up and the preparation intermediate layer.Carry out the sclerosis of insulating polymer subsequently.For example, if employed insulating polymer is a thermosetting resin, then apply heat.
This insulating polymer can be the polymer of thermosetting, thermoplasticity or elastic type.
Should note, importantly, the textle layers that is used to prepare composite interlayer is arranged in such a way, and makes insulating polymer easily and equably be penetrated in the textle layers, thereby obtains to have the intermediate layer (referring to Fig. 3 a and Fig. 3 b) of the even composition and the even coefficient of expansion.
Textile density is high more in the known intermediate layer, the coefficient of expansion of the composition of gained is more little, should suitably select this density (it is as the function of the coefficient of expansion in the intermediate layer of expectation acquisition), promptly, the textile density of the weaving number of plies and/or each textle layers, wherein each textle layers has identical density.
The thermal coefficient of expansion of composite bed preferably is adjusted to feasible approximating 1/2(α 1+ α 2), α wherein 1And α 2Be respectively the thermal coefficient of expansion of vacuum switch chamber and secondary moulding resin.
The intermediate layer of secondary moulded work of the present invention makes it possible to limit the difference between the material coefficient of thermal expansion coefficient of vacuum switch chamber and molded plastic shell.Therefore, this intermediate layer makes the thermal dilation difference between the material of the material (dielectric insulation that is used for vacuum switch chamber) of molded plastic shell and vacuum switch chamber itself reduce.
In two kinds of execution modes described above, obtain to have about 22 * 10 -6/ ℃ the intermediate layer of thermal coefficient of expansion.
Deducibility from the diagram of Fig. 2, by this way the intermediate layer 2 of Huo Deing effectively (ineffect) have material coefficient of thermal expansion coefficient in vacuum switch chamber 2 and molded plastic shell 5 (it be respectively 8 * 10 -6/ ℃ and 36 * 10 -6/ ℃) middle Coefficient of Thermal Expansion value.
Because the thermal coefficient of expansion in the middle of this, the expansion in the ceramic material that occurs in the vacuum switch chamber overcoat is born in the intermediate layer, and occur in expansion in the molded plastic shell, and without any the minimum sign of damage (for example, the cracking of peeling off or peeling off at the interface, material etc.).
In addition, be used to equally make under the situation of intermediate layer and molded plastic shell at identical insulating polymer, this makes can guarantee that the intermediate layer not only originally all has excellent mechanical intensity and high-adhesiveness on one's body on the material of the overcoat of vacuum switch chamber but also in molded plastic shell.
This excellent mechanical intensity and high-adhesiveness are (owing to use common (or identical, common) insulating polymer) to improve the ability (capacity) of any sign of intermediate layer opposing dielectric damage (dielectricdamage) again slightly.
Therefore, the material of material of vacuum switch chamber (pottery) and molded plastic shell, because they contacts with the intermediate layer, thus owing to heating power (thermal force) to be subjected to the severe degree of stress much smaller, present to approach they self thermal behavior (for example expansion) more.
Preferably, nTextle layers and intermediate layer are stacked, can be evenly and easily be penetrated into wherein three-dimensional network so that form insulating polymer.For this reason, three-dimensional network has the parallel that fully separated so that the filler of insulating polymer (for example, the silica filled thing of insulating resin) can pass through, and therefore makes to have a certain proportion of filler of homogeneous as far as possible in insulating polymer.
Such embodiment who piles up has been shown among Fig. 3 a and Fig. 3 b.In this embodiment, three identical textle layers (layer that promptly has the fiber of identical mesh and same composition and same diameter) pile up (seeing Fig. 3 b) by this way each other, make to form to have the three-dimensional network of homogeneous mesh pattern.In this embodiment, if suppose one deck in these layers (for example, bottom, it is known as ground floor 10) for rectangle reference frame (frameofreference) (O, i, j), then because the size of this framework is based on the width of mesh of described layer, the layer (being called the second layer 20) that therefore is located immediately at these ground floor 10 tops have its reference frame (O ', I ', J '), its with respect to ground floor in direction iLast skew 1/3 and in direction jLast skew 1/3; And the layer (being called the 3rd layer 30) that is positioned at second layer top have its reference frame (O ", I ", J "), its with respect to ground floor in direction iLast skew 2/3 and in direction j2/3, the three layer of last skew with respect to the second layer in direction iLast skew 1/3 and in direction jLast skew 1/3.By this way, obtain a kind of uniform three-dimensional network (a) referring to Fig. 3.
Secondary moulded work of the present invention has many advantages.Because the existence in intermediate layer, it has limited the differential expansion between the material of the material that occurs in vacuum switch chamber and molded plastic shell.
In addition, secondary moulded work of the present invention only comprises a kind of single homogeneous composite bed (intermediate layer) that is made of textle layers.Therefore the invention provides a solution, it not only tries out than solution well known in the prior art is simpler and easier, and cost is also lower.
According to preferred implementation of the present invention, common when using (or it is identical, when common) insulating polymer is used to prepare intermediate layer and molded plastic shell, even can help the secondary molding of vacuum switch chamber of the present invention more.
At last, secondary moulded work of the present invention is structurally simpler than the secondary moulded work that in the prior art, especially proposes in the document [2], and is therefore more reliable.In this, striding single homogeneous composite bed (it has the constant expansion coefficient) here takes place by the transition to the material of molding layer of the material of vacuum switch chamber.
List of references
[1]EP?0?866?481
[2] Japan Patent P2000-294087A

Claims (15)

1. secondary moulded work that is used for vacuum switch chamber, described secondary moulded work comprises intermediate layer (4) and molded plastic shell (5), the two is described vacuum switch chamber electric insulation is provided, described intermediate layer (4) be suitable for being arranged on described vacuum switch chamber (6) on every side, between described vacuum switch chamber (6) and the described molded plastic shell (5);
Described intermediate layer is made by homogeneous composite material, and it comprises nIndividual textle layers (10; 20; 30) and the dipping and cover described nFirst insulating polymer of individual textle layers, wherein nMore than or equal to 1; And
Described molded plastic shell is made by second insulating polymer;
Described secondary moulded work is characterised in that, described intermediate layer (4) have the constant thermal coefficient of expansion of scope between the thermal coefficient of expansion of the thermal coefficient of expansion of described vacuum switch chamber and described molded plastic shell (5); And described intermediate layer is the layer that comprises at least one textle layers unique in the described secondary moulded work.
2. the secondary moulded work that is used for vacuum switch chamber according to claim 1 is characterized in that, described intermediate layer (4) described nIndividual textle layers (10; 20; 30) one deck is stacked on another layer, and each layer and next interlayer are every constant distance.
3. according to claim 1 or the described secondary moulded work that is used for vacuum switch chamber of claim 2, it is characterized in that described intermediate layer (4) described nEach layer in the individual textle layers is that the parallel fibers by parallel fibers that makes first series with non-zero angle and at least a second series interweaves and forms.
4. the secondary moulded work that is used for vacuum switch chamber according to claim 3 is characterized in that, described intermediate layer (4) described nEach layer in the individual textle layers is that the parallel fibers by parallel fibers that makes first series with about 90 ° angle and at least a second series interweaves and forms.
5. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 4, it is characterized in that in each textle layers of described intermediate layer (4), the spacing in the fiber of same train between the fiber of vicinity is constant.
6. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 5, it is characterized in that described intermediate layer (4) described nIndividual textle layers has identical composition and identical density.
7. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 6, it is characterized in that described intermediate layer (4) described nIndividual textle layers is made by glass fibre.
8. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 6, it is characterized in that described intermediate layer (4) described nIndividual textle layers is made by polyester fiber.
9. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 6, it is characterized in that described intermediate layer (4) described nIndividual textle layers is made by string.
10. according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 9, it is characterized in that described intermediate layer (4) described nIndividual textle layers is equidistant and vertical misalignment each other by this way, makes described nIndividual layer be parallel to described nThe spacing that projection on the common plane on the plane of individual textle layers produces between the wherein said parallel fibers is constant layer.
11. the secondary moulded work that is used for vacuum switch chamber according to claim 1 is characterized in that, described first insulating polymer and described second insulating polymer are identical insulating polymers.
12., it is characterized in that described intermediate layer (4) have the thickness of scope at 0.2mm to 20mm according to each described secondary moulded work that is used for vacuum switch chamber in the claim 1 to 11.
13. vacuum switch chamber that has according to each described secondary moulded work in the claim 1 to 12.
14. the method for a secondary molding vacuum switch chamber may further comprise the steps:
A) on described vacuum switch chamber, form intermediate layer (4); And
B) go up formation molded plastic shell (5) in described intermediate layer (4);
Described intermediate layer (4) and described molded plastic shell (5) are used to make described vacuum switch chamber electric insulation;
Described method is characterised in that step a) comprises:
On described vacuum switch chamber, deposit nThe individual textle layers that piles up, nFor more than or equal to 2 integer, described nThe constant spacing of individual textle layers each interval, and by this way each other the skew make k textle layers (k-1) individual textle layers below being attached to the rectangle reference frame (O, i, j) direction iLast deviant 1/n and in direction jLast deviant 1/n, kFor scope 2 to nInteger; And
Deposit the layer of first insulating polymer, feasible dipping also covers described nIndividual textle layers;
The feature of described method is that also the molded plastic shell that forms is made by second insulating polymer in step b).
15. the method for secondary molding vacuum switch chamber according to claim 14, wherein, described second insulating polymer of described first insulating polymer in described intermediate layer and described molded plastic shell is mutually the same.
CN200910136434A 2008-11-24 2009-05-08 Overmoulding for vacuum bulb Pending CN101740259A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0857959 2008-11-24
FR0857959A FR2938966B1 (en) 2008-11-24 2008-11-24 OVERMOLDING FOR VACUUM BULB

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CN101740259A true CN101740259A (en) 2010-06-16

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FR (1) FR2938966B1 (en)
WO (1) WO2010058025A1 (en)

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CN103119680A (en) * 2010-08-13 2013-05-22 Abb技术股份公司 Fibre reinforced insulation material for embedded vacuum interrupters
WO2015024230A1 (en) * 2013-08-22 2015-02-26 Dow Global Technologies Llc Method for producing circuit-breaker pole parts
CN105518819A (en) * 2013-08-22 2016-04-20 陶氏环球技术有限责任公司 Method for producing circuit-breaker pole parts

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