CN206639652U - Direct current cables annex silicon rubber insulation surface molecules structure regulating device - Google Patents
Direct current cables annex silicon rubber insulation surface molecules structure regulating device Download PDFInfo
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- CN206639652U CN206639652U CN201720189977.1U CN201720189977U CN206639652U CN 206639652 U CN206639652 U CN 206639652U CN 201720189977 U CN201720189977 U CN 201720189977U CN 206639652 U CN206639652 U CN 206639652U
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- silicon rubber
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- direct current
- surface molecules
- current cables
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Abstract
The utility model discloses direct current cables annex silicon rubber insulation surface molecules structure regulating device, including the reactor for placing sample, heater and temperature probe are provided with the reactor, reactor is connected to fluorine gas bottle, nitrogen cylinder and vavuum pump by pipeline, valve is equipped with the pipeline, the vavuum pump is connected with vent gas treatment tank, and the temperature probe is connected with temperature element, air gauge is additionally provided with reactor.The electron screening for strengthening direct current cables annex silicon rubber insulation space by the device acts on.
Description
Technical field
Reinforced insulation space-charge screening method field is the utility model is related to, is to be related to direct current cables in particular
Annex silicon rubber insulation surface molecules structure regulating device.
Background technology
With industrialized continuous development and the continuous progress of science and technology, polymer matrix solid dielectric material is in high electricity
Press answering in the special sensors of behavior such as engineering, power electronics, microelectronics insulate and all kinds of dependence electric charges are resident and polarized
With more and more extensive.Particularly the polymer nanocomposites of material are a dark horse based on polymer in recent years, are turned into
The study hotspot of electric insulation and relevant art.
Silicon rubber composite insulation is used as cable with its excellent dielectric properties, high and low temperature resistance, tensile property etc.
Annex reinforced insulation.And for direct current cables annex, because silicon rubber reinforced insulation is chronically at the work of unipolar electric field
Under, various interfaces, defect or impurity existing for inside insulating materials can cause interfacial polarization row occurs inside insulating materials
For and space charge injection, so as to fault location formed space charge accumulation phenomena.The generation and accumulation of space charge
Dielectric can be caused to be partially formed high field intensity, and then trigger shelf depreciation, cause fracture and the free radical of polymer molecule key
Formation, accelerating medium aging, so influence dielectric substance dielectric strength；On the other hand, with dielectric dielectric strength
Decline, the formation of space charge induced discharge passage, easily trigger in solid insulating material electric branch discharge and cause absolutely
The breakdown of edge material, cause the generation of interruption of service.Direct current cables annex has become the key in direct current cables transmission system
Position and weak link, and the injection of space charge and accumulation are exactly to cause the basic reason of this problem, become direct current
Key issue urgently to be resolved hurrily in cable fittings development.
At present, the space charge suppressing method of solid dielectric insulation is broadly divided into two classes in theory：First, solid insulation is situated between
Matter sheet is modifies, and the most frequently used at present is exactly inorganic nanoparticles composite dielectrics.But due to direct current cables annex in industry
Interior silicon rubber reinforced insulation, which needs to fill substantial amounts of gas-phase silica, antistructurizing agent, tear-proof agent and vulcanizing agent etc., to be added
Add agent to improve its performance such as electrically and mechanically, therefore substantial amounts of chemical impurity composition is introduced into inside silicon rubber insulation, thus
The method for proving inorganic nanoparticles filling has been tested for the addition of the silicon rubber reinforced insulation of certain balanced constant not
It is applicable.Second, solid dielectric insulation surface is modified, increase electron screening layer on its surface, suppress space charge injection so as to reach
Effect.Currently used method is to paste one layer of insulation film in polymer surfaces, although this method can suppress empty
Between electric charge injection, but also change insulation system and Electric Field Distribution situation simultaneously, directly affects Jie of silicon rubber insulation
Electricity, breakdown and flashover performance etc., therefore such method still has no the report of related application so far.
Therefore, how in the case where not influenceing silicon rubber insulation matrix dielectric properties its surface introduce a space electricity
Lotus screen layer is still a problem at present, and direct current cables accessory internal silicon rubber reinforced insulation problems with space charge is urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, there is provided a kind of direct current cables annex silicon rubber
Insulate top layer molecular structure device, and the electron screening for strengthening direct current cables annex silicon rubber insulation space by the device is made
With.
The purpose of this utility model is achieved through the following technical solutions：
Direct current cables annex silicon rubber insulation surface molecules structure regulating device, including for placing the reactor of sample,
Be provided with heater and temperature probe in the reactor, reactor is connected to fluorine gas bottle, nitrogen cylinder and very by pipeline
Empty pump, valve is equipped with the pipeline, the vavuum pump is connected with vent gas treatment tank, and the temperature probe is connected with thermometric member
Part, air gauge is additionally provided with reactor.
Compared with prior art, beneficial effect caused by the technical solution of the utility model is：
(1) injection and the accumulation process of silicone rubber insulation material Space-charge are significantly inhibited；
(2) insulation and the mechanical performance of cable accessory silicon rubber reinforced insulation itself are not influenceed；
(3) production technology and simple flow, and course of reaction is stably and controllable.
Brief description of the drawings
Fig. 1 is the principle schematic diagram of the utility model device.
Fig. 2 is the principle of adjustment and control figure of the utility model silicon rubber insulation surface molecules structure.
Fig. 3-1 and Fig. 3-2 is silicon rubber top layer pattern contrast signal before and after surface molecules structure regulating in the utility model
Figure；Fig. 3-3 and Fig. 3-4 is that silicon rubber chemical element forms contrast signal before and after surface molecules structure regulating in the utility model
Figure.
Fig. 4-1 to Fig. 4-3 is the silicon rubber insulation space electricity of different surface molecules structure regulating degree in the utility model
Lotus accumulation characteristic schematic diagram.
Fig. 5-1 to Fig. 5-3 is the silicon rubber insulation space electricity of different surface molecules structure regulating degree in the utility model
Lotus dissipation characteristic schematic diagram.
Reference：1- reactors, 2- fluorine gas bottles, 3- nitrogen cylinders, 4- vavuum pumps, 5- vent gas treatment tanks, 6- temperature elements,
7- air gauges, 8- temperature detection gauge heads
Embodiment
The utility model will be further described below in conjunction with the accompanying drawings：
Due to containing substantial amounts of methyl group in silicon rubber surface molecules, using the active activity performance of fluorine gas to silicon rubber
Surface molecules structure regulating is carried out, c h bond is replaced by C-F keys, it is a large amount of fluorine-containing so as to be introduced in silicon rubber surface molecules
Functional group, the regulation process of silicon rubber top layer chemical molecular formula are as shown in Figure 2.Because fluorine gas has stronger corrosivity, therefore
To ensure the personal security during surface molecules structure regulating, a set of direct current cables annex silicon rubber reinforced insulation table is devised
The regulation device of layer molecular structure, as shown in figure 1, including the reactor 1 for placing sample, reactor 1 is interior to be provided with heating dress
Put and fluorine gas bottle 2, nitrogen cylinder 3 and vavuum pump 4 are connected to by pipeline, are equipped with pipeline with temperature probe 8, reactor 1
Valve, vavuum pump 4 are connected with vent gas treatment tank 5, and temperature probe 8 is connected with temperature element 6, air gauge is additionally provided with reactor 1
7。
Specific regulation and control step is as follows：
1. using the quick inner air of extraction kettle 1 of vavuum pump 4, until on reactor 1 gauge hand reach-
After 0.1MPa, vavuum pump 4 is closed；The pressure-reducing valve of nitrogen cylinder 3 is opened, high pure nitrogen is injected into reactor 1 and reaches ambient pressure.
After being iteratively repeated said process five times, ensure the thorough emptying of gas in reactor and pipeline.
2. being slowly filled with fluorine, nitrogen mixed gas that fluorine gas volume fraction is 20% to the inside of reactor 1 causes gas in reactor 1
Pressure reaches 300mbar；
3. and then to being filled with high pure nitrogen inside reactor 1 until air pressure reaches 500mbar (0.5 standard in reactor 1
Atmospheric pressure), obtain certain density fluorine, nitrogen mixed gas and be allowed to and silicon rubber specimen reaction.It is 25 to keep temperature in reactor 1
DEG C, after certain reaction time, open vavuum pump and discharge internal residual gas.The present embodiment is in control hybrid reaction gas
Body air pressure, concentration and reaction temperature it is constant on the premise of, change the reaction time obtained the surface molecules structure regulating time difference
For 20 and 40min silicon rubber sample.
The utility model is by being several microns by introducing fluorine-containing functional group to form a layer thickness in silastic surface
The surface fluorination layer of left and right.Fluorine member is the atom that atomic radius is minimum in addition to hydrogen atom, and it has extremely strong electronegativity (beam
Tie up the ability of electronics), so as to which the injection process of electronics at bucking electrode/dielectric interface, shielding space electric charge are exhausted to silicon rubber
Injection and accumulation inside edge.
Utilize the table of silicon rubber sample after SEM and X-ray energy spectrum analysis observation surface molecules structure regulating
Layer top layer pattern and chemical element are formed, as shown in Fig. 3-1 to Fig. 3-4.It can be found that formd on silicon rubber specimen surface
One layer of obvious fluorinated layer.Formed using the element of red boxes inner region in X-ray diffraction analysis comparison diagram 3-1 and 3-2, just
Demonstrate and introduce substantial amounts of fluorine element in sample surface molecules after reacting.
Using three groups of examinations of electroacoustic pulse (PEA) space charge measurement method measurement differential responses time the most frequently used at present
Sample space charge gathers gathers situation it can be found that surface molecules knot with dissipation characteristic, the space charge from Fig. 4-1 to Fig. 4-3
Structure regulation and control 20min silicon rubber sample almost gathers inside it relative to other two groups of samples without space charge, electric charge quilt
The surface fluorination layer of sample both sides is shielded on sample top layer, and it shows obvious space charge rejection characteristic.And for reaction
Time is that excessive surface molecules structure causes the Si-O-Si main chains in silicon rubber molecule for 40min silicon rubber sample
Destroyed by fluorine nitrogen mixed gas, substantial amounts of fracture and small molecule isopolarity group are formed in specimen surface, so as to exacerbate space
The accumulation of electric charge.
The silicon rubber insulation space charge evanishment of different surface molecules structure regulating degree in from Fig. 5-1 to Fig. 5-3
In, it is same it can be found that silicon rubber insulation internal space-charge is minimum when the reaction time is 20min, and it is most fast to dissipate.Therefore it is right
In silicon rubber reinforced insulation, when reaction temperature is 25 DEG C, fluorine nitrogen mixed gas bulk concentration is 20%, pressure is 500mbar, reaction
Time is set as that 20min can form layer of surface fluorinated layer in silastic surface, and shielding space electric charge is to inside sample
Injection process.By forming a sheaf space electron screening layer on its surface to silicon rubber insulation surface molecules are structurally-modified, to straight
Flow the effect that cable accessory forms space-charge screening.
The utility model is not limited to embodiments described above.The description to embodiment is intended to describe above
With explanation the technical solution of the utility model, above-mentioned embodiment is only schematical, is not restricted.
In the case of not departing from the utility model aims and scope of the claimed protection, one of ordinary skill in the art is in this practicality
The specific conversion of many forms can be also made under new enlightenment, these are belonged within the scope of protection of the utility model.
Claims (1)
1. direct current cables annex silicon rubber insulation surface molecules structure regulating device, it is characterised in that including for placing sample
Reactor, is provided with heater and temperature probe in the reactor, reactor is connected to fluorine gas bottle, nitrogen by pipeline
Gas cylinder and vavuum pump, valve is equipped with the pipeline, and the vavuum pump is connected with vent gas treatment tank, the temperature probe connection
There is temperature element, air gauge is additionally provided with reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720189977.1U CN206639652U (en) | 2017-02-28 | 2017-02-28 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720189977.1U CN206639652U (en) | 2017-02-28 | 2017-02-28 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device |
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| Publication Number | Publication Date |
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| CN206639652U true CN206639652U (en) | 2017-11-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847422A (en) * | 2017-02-28 | 2017-06-13 | 天津大学 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device and method |
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2017
- 2017-02-28 CN CN201720189977.1U patent/CN206639652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847422A (en) * | 2017-02-28 | 2017-06-13 | 天津大学 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device and method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20180228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |