CN1027024C - Gas insulating electric apparatus - Google Patents
Gas insulating electric apparatus Download PDFInfo
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- CN1027024C CN1027024C CN 85102888 CN85102888A CN1027024C CN 1027024 C CN1027024 C CN 1027024C CN 85102888 CN85102888 CN 85102888 CN 85102888 A CN85102888 A CN 85102888A CN 1027024 C CN1027024 C CN 1027024C
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- insulating barrier
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- gas
- insulating
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Abstract
The present invention relates to a gas insulated electric apparatus which comprises a metal pipe inside which an insulating gas is hermetically contained, a conductive body which is arranged inside the metal pipe and is supported by an insulating support part, and an insulation layer which is arranged on the inner wall of the metal pipe and is doped with a substance with high performance of insulation. As a result, the gas insulated electric apparatus has the dielectric constant equal to or greater than 10.
Description
The invention relates to gas insulated electric apparatus, more particularly, is a kind of like this gas insulated electric apparatus, even sneak at conducting particles under the situation of this equipment, also can prevent the reduction of dielectric strength in this equipment.
Under many occasions, gas insulated electric apparatus wherein has a high pressure object as power supply conductor to be assemblied in one and is sealed with electronegative gas, as SF as a kind of device
6In the metal tube of gas, sneak into these equipment and fall and be attached under the situation of pipe bottom at conducting particles, this conducting particles rises from tube wall under the tube interior electric field action, and floating in the gas compartment.Because these floating conducting particless, the dielectric strength of the gas compartment reduces greatly, for guaranteeing the insulating reliability of equipment, needs a kind of equipment disposition of avoiding this conducting particles influence.
In order to address this problem, as indicated in No. the 136811/80th, the Japanese patent application, a kind of device is arranged, have such configuration, the insulating barrier that promptly has high-k at tube wall is because the voltage of this equipment of supply produces a kind of strong electrostatic attraction that can overcome the static floating force that acts on conducting particles, this electrostatic attraction acts between conducting particles and the pipe bottom, thereby suppresses the float of conducting particles.In this case, be necessary to use high megohmite insulant to form an insulating barrier, the permittivity ratio predetermined value of this megohmite insulant is big.Usually, a kind of dielectric constant of organic high molecular compound is not more than 6.Though the dielectric constant of the barium titanate of inorganic compound such as sintering can reach several thousand, materials such as sintering barium titanate are frangible, and can not process.Moreover it also is difficult on the pipe with annular inner wall that the barium titanate of sintering is fixed to.
On the other hand, need to increase the electrostatic attraction that attracts conducting particles on the insulating barrier, so that further improve the insulation property of equipment.
The objective of the invention is to increase gravitation to conducting particles on insulating barrier, and, a gas insulated electric apparatus is provided, wherein, an insulating barrier is arranged, it can semipermanent stick on the tube wall securely.
According to the present invention, a kind of gas insulated electric apparatus is provided, comprise the metal tube of a hermetic seal insulating gas, a conductor that in above-mentioned metal tube, supports, a insulating barrier at above-mentioned metal pipe internal surface by insulating support member.The coating that this insulating barrier is formed by mixing material, strong insulating material powder and organic material mixing acquisition by inorganic material wherein, have the fine powder of high-k to be dissolved in the adhesive as filler.The dielectric constant of this coating can be adjusted according to filler mixing ratio and dielectric constant thereof.Experiment confirm, when coating formed, its dielectric constant became and is equal to or greater than 10, can be suppressed attached to the float of the conducting particles on the coating.With such method, as with the thin dielectric film semipermanent of high-k system ground and firmly place the mode of equipment inwall to carry out coating, just formed the present invention with mixing material.
In addition, according to the present invention,, can carry out conductive processing in a side of insulating barrier for increasing the electrostatic attraction of insulating barrier.
The present invention is described with reference to the accompanying drawings as follows:
Fig. 1 is a first embodiment according to the invention, has the gas insulated electric apparatus vertical cross section of insulating barrier.
Fig. 2 is along the sectional view of II-II line among Fig. 1 embodiment.
Fig. 3 represents the mixing ratio of slurry and filler and the relation curve of dielectric constant.
Fig. 4 represents to attract the electric field and relation curve in insulating barrier is polarized when handling DC electric field of the insulating barrier of a conducting particles.
Fig. 5 A and 5B are the schematic diagrams of second embodiment of the invention.
Fig. 6 is the partial section of second embodiment of the invention.
Fig. 7 represents second embodiment of the present invention, and conducting particles is attracted to the curve that the power of insulating barrier increases to some extent; And
Fig. 8,9,10 is the structure chart after expression improves first and second embodiment of the present invention.
With reference to figure 1,2, gas insulated electric apparatus is to constitute in such a manner, that is: one by insulating support member 2 insulation the high-pressure conductor 3 that supporting, high-pressure conductor 3 is placed in inner envelope to be had in the grounded metal pipe or grounding container 1 of insulating gas, the insulating barrier 4 of the high voltage insulation system that forms on the inwall of pipe 1 is formed by a coating, this coating forms with the way that is coated with a kind of mixed liquor, and is dissolved with the fine powder of strong insulating material in its slurry.
Can overcome the electrostatic attraction of static floating force, pass through the electric field that produced, act on conducting particles 5 and 6, (this particle be fall and attached on the insulating barrier 4 between pipe bottom and the conducting particles).So that hinder and sneak into the conducting particles 5 of equipment and 6 float.
For obtaining the float that enough electrostatic attractions hinder conducting particles effectively, the dielectric constant that is necessary to make insulating barrier is greater than 10, yet this dielectric constant is the dielectric constant by slurry and filler, or even they composite rate determined.
Fig. 3 represents, with the coating solution (solvent 40% raw material 60%) of common not water mixing as slurry, the barium titanate ceramic fine powder is during as filler, the relation curve of the dielectric constant of the coating that the mixing ratio of above-mentioned substance and above-mentioned mixing material form.The DIELECTRIC CONSTANT of coating
r, can increase by the combined amount ω that increases filler.In ω 〉=20(percentage by volume) situation under, can obtain ε
r〉=10.On the one hand, the composite rate as shown in Figure 3 and the relation of dielectric constant mainly change along with the dielectric constant of filler, simultaneously, use the filler of high-k, also can increase ε effectively
r
In addition, as a kind of slurry, the liquid that a kind of set strength is very strong can be expected, this just may produce such effect, that is: the bond properties that is coated in the coating on the tube wall can be very strong, and, insulating barrier 4 can be fixedly secured to semipermanents.
For the protective money metal surface, adopt anticorrosive paint etc. as slurry, just can produce such effect, that is: insulating barrier also has a kind of metal surface protection function, as function such as anticorrosion.
On the one hand, can be used as the material of slurry, can be phenolic resins, urea resin, melamine resin, alkyd resins, mylar, epoxy resin, vinylite, polystyrene, acrylic resin, polyamide, fluororesin, ester is for resin etc.In addition, also can use above-mentioned arbitrary material coating and the japanning as primary raw material.
Though, with use barium titanate ceramic as example as filler, as mentioned above, also can make and make lithium tantalate, sodium niobate or lithium niobate be as strong insulating material, or with the lead titanates fine powder etc., or their solid solution.If when using barium titanate, when packing material surpasses 20%, slurry and can make DIELECTRIC CONSTANT
rBe equal to or greater than 10 filler volume of mixture than just obtaining.And with the situation of other material, its result is as described below: in DIELECTRIC CONSTANT
rBecome greater than 10 o'clock, the situation of volume ratio is as follows, and the volume ratio of lead titanates is greater than 25%, and lithium tantalate is greater than 10%, and lithium niobate is greater than 10%, and sodium niobate is greater than 20%.
On the other hand, the processing that polarizes of one direct current electric field is provided for insulating barrier 4, the dielectric constant of insulating barrier 4 can further improve like this, so that electrostatic attraction can further increase, Fig. 4 is an example, be illustrated in the conducting particles on the insulating barrier electrical field of attraction intensity (when conducting particles when surface of insulating layer shifts out, the electric field strength (EL in the pipe
0) and the DC electric field intensity E that is used to polarize and handles
DCRelation.
The insulating barrier electric field strength E that the rectangle of the hatching of Fig. 4 left-half is represented to polarize and handled
L0, electric field strength approximately is 0.85-1.05kv/mm.It is E that the rectangular tables of the hatching of Fig. 4 mid portion is shown in electric field strength
DCThe polarization of=2kv/mm is handled down, the electric field strength E of insulating barrier 4
L0, it is about 0.85-1.25kv/mm.Be shown in the hatching rectangular tables of Fig. 4 right-hand part and carry out E
DCThe polarization of=3.5kv/mm is handled down, the electric field strength E of insulating barrier 4
L0, it is about 1.4-1.6kv/mm.Such situation is arranged, because E
DC=2 (kv)/(mm) polarize when handling, and electrical field of attraction intensity is almost low can not carry out (E to polarization
DC=0 (kv)/(mm)).Otherwise another kind of situation is because E
DC=3.5 (kv)/(mm) polarize when handling E
L0Value compare with above-mentioned two kinds of situations greatly and to improve.In the drawings, shown in the line that point and dash are linked to be, compare, might obtain more satisfied effect with bare electrode (metal of naked layer exposes), from this result as can be known, when handling, just satisfy E when polarizing
DC＞2 (kv)/(mm) then can effectively utilize the effect that insulating barrier forms as far as possible.
As the method that polarization is handled, after insulating barrier 4 formed in pipe 1, a direct voltage was added between pipe 1 and the conductor 3, produces the electric field greater than (2kv)/(mm) there.
First embodiment according to the invention has so effect, that is: the attraction of particle and insulating barrier has increased; Be mixed with slurries such as filler by spraying its inside, insulating barrier can easily form on tube wall.Like this, its generation type can be simplified greatly; And strengthen to some extent with the bonding performance of tube wall.
Below, with reference to figure 5A, 5B, 6,7 will make an explanation to second embodiment of the present invention.
At first, with reference to figure 5A, insulating barrier 4 is insulation boards or is mixed with above-mentioned mixed with resin or with a kind of thin-film material such as polyethylene and formed by above-mentioned strong insulating material.If insulation board 4 is placed tube inner wall, because the problem such as coarse of the restriction of operating accuracy and pipe 1 inwall, between the inwall of pipe 1 and insulation board, produce gap g.If have electric weight is a Q
1Particle 5 fall on the insulation board, so, in insulation board 4 by the particle side induce equivalent with it and reversed polarity electric charge+Q
2Otherwise, also induce electric charge-Q on the surface of opposite side
3(Q
3=Q
2), as shown in the figure.In addition, on the inwall of the pipe 1 that has gap g also induction have and-Q
3Electric charge+the Q of polarity opposite polarity
4In this case, to the attraction F of particle 5
12, by the quantity of electric charge be-Q
1Charged particle and the quantity of electric charge+Q that on insulation board, is responded to
2With their spacing decision.Yet, very thin in the thickness t of insulation board 4 since with the electric charge-Q of charged particle identical polar
3Can not ignore at the repulsive force that the insulation board reverse side produces; So that attraction can not make full use of.On the other hand, shown in Fig. 5 B, if the back side of insulating barrier is close to the interior pipe of pipe 1 ,-Q
3With+Q
4Neutralization mutually, like this, by-Q
3The repulsion that produces can be ignored, and-Q
1With+Q
2Between gravitation F
12Can make full use of.Thereby, might overcome the floating of particle.
Because electric charge-Q
3With+Q
4Cancel out each other, as shown in Figure 6, adopt methods such as injections, the face of conductive materials is contacted with the inwall of pipe 1, be adhered to the back side of insulation board 4, thereby, formation electrode 7.
Fig. 7 represents by form the effect that electrode 7 is obtained on insulation board 4.Wherein the longitudinal axis is represented the relative value that electrical field of attraction attracts particle, the situation that 1 expression does not have insulation board to exist.The insulation board of the A representative formation electrode 7 of transverse axis.Under the situation of A, with the regular situation ratio that does not have insulation board to exist, electrical field of attraction has improvement slightly; But do not obtain remarkable result.On the one hand, the insulation board situation of B representative formation electrode 7, and also we find that electrical field of attraction has at this moment strengthened about 3 times than regular situation.Promptly according to second embodiment of invention, the electrical field of attraction of particle can improve greatly, even so that when a particle entrained gas insulation electrical equipment, particle is floating when avoiding voltage to be added on the equipment, thereby has improved insulating reliability.
With regard to the insulation board configuration, there is no need it is arranged on the inwall of whole grounding container.As shown in Figure 9,, consider the effect of particle, also can obtain abundant effect even insulation board only places container bottom.In addition, do not need along the length direction of entire container insulation board to be set, this insulation board also can be provided with as shown in Figure 8 partly.
On the other hand, as shown in figure 10, insulation board also can only place insulating support member, and for example supporter 8 or be easy to is subjected near the object that particle influences.In Figure 10, label 9,10 expression is used to support and the metal parts of stationary support 8.In this case, insulation board 4 is close to metal support component 9, has constituted the structure of insulating barrier 4 of the present invention, thereby produce one and similar effects shown in Figure 5.In addition, need not insulation board is fixed on the bottom surface of grounding container, only need inside it and insulation stent overall package, therefore, this collocation method from produce say so superior.
Claims (6)
1, electric gas-isolated device comprises:
The metal tube of a sealed insulation gas,
A conductor that in above-mentioned metal tube, supports by insulating support member;
It is characterized in that one above-mentioned metal pipe internal surface by the strong insulating material powder of inorganic material and organic material mix obtain thereby its dielectric coefficient more than or equal to 10 insulating barrier.
2, electric gas-isolated device according to claim 1,
It is characterized in that: be applied to the above-mentioned insulating barrier that forms in the above-mentioned metal tube by the strong insulating material powder of inorganic material and the mixing material of organic material.
3, electric gas-isolated device according to claim 1,
It is characterized in that: above-mentioned insulating barrier is a plate or sheet;
And described electric gas-isolated device comprises that also one forms electrode on above-mentioned insulating barrier and above-mentioned metal pipe internal surface facing surfaces, thereby above-mentioned electrode is offset the electric charge of responding on above-mentioned insulating barrier, the polarity that each electric charge had with float to metal tube on the conducting particles charge polarity identical.
4, according to the described gas electric insulation of claim 2 electric equipment, it is characterized in that: above-mentioned insulating barrier is by close support component setting.
5, according to the described gas insulated electric apparatus of claim 2, it is characterized in that: insulating barrier is polarized under the electric field strength more than or equal to 2KV/mm.
6, gas insulated electric apparatus according to claim 2 is characterized in that: strong insulating material is a barium titanate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102888 CN1027024C (en) | 1985-04-15 | 1985-04-15 | Gas insulating electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102888 CN1027024C (en) | 1985-04-15 | 1985-04-15 | Gas insulating electric apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102888A CN85102888A (en) | 1986-10-15 |
| CN1027024C true CN1027024C (en) | 1994-12-14 |
Family
ID=4792835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102888 Expired - Lifetime CN1027024C (en) | 1985-04-15 | 1985-04-15 | Gas insulating electric apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1027024C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989671B (en) * | 2004-06-28 | 2010-06-16 | 西门子公司 | Enclosed housing of an electric energy transfer device with a particle trap |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW317668B (en) * | 1996-02-28 | 1997-10-11 | Hitachi Ltd | |
| US5747765A (en) * | 1996-09-13 | 1998-05-05 | Cooper Industries, Inc. | Vertical antitracking skirts |
| JPH10321096A (en) * | 1997-05-23 | 1998-12-04 | Mitsubishi Electric Corp | Switch |
| NL1017797C2 (en) * | 2001-04-09 | 2002-10-10 | Holec Holland Nv | Single or multi-phase switching device in an enclosing housing. |
| CN104052011B (en) * | 2014-07-09 | 2017-08-25 | 江苏神马电力股份有限公司 | gas-insulated transmission line |
-
1985
- 1985-04-15 CN CN 85102888 patent/CN1027024C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989671B (en) * | 2004-06-28 | 2010-06-16 | 西门子公司 | Enclosed housing of an electric energy transfer device with a particle trap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102888A (en) | 1986-10-15 |
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