CN110504074A - A method of for improving silicon rubber flashover voltage - Google Patents
A method of for improving silicon rubber flashover voltage Download PDFInfo
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- CN110504074A CN110504074A CN201910696739.3A CN201910696739A CN110504074A CN 110504074 A CN110504074 A CN 110504074A CN 201910696739 A CN201910696739 A CN 201910696739A CN 110504074 A CN110504074 A CN 110504074A
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- silicon rubber
- flashover voltage
- fluorine
- flashover
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
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Abstract
The present invention relates to a kind of method for improving silicon rubber flashover voltage, this method is fluorination treatment to be carried out to silastic surface using containing fluorine mixed gas, to improve the flashover voltage of silicon rubber in confined reaction room.Compared with prior art, the method of the present invention technical process is simple, controllability is good, economic cost is low, it can equably be modified the silicon rubber insulator or insulating part with arbitrary shape and size in batches, especially suitable for commercial applications, and the flashover voltage that the method for the present invention generates improves highly significant.
Description
Technical field
The present invention relates to the methods that one kind can improve significantly silicon rubber flashover voltage, specially carry out table to silicon rubber
Face is fluorinated modified, belongs to high-voltage insulation technique field, is associated with high voltage power transmission and distribution project.
Background technique
Due to good hydrophobicity, unique migration of hydrophobicity, excellent electrical insulation capability, high-low temperature resistant and weatherability
Deng silicon rubber is the most important outer insulating material of power industry.Now, high-temperature silicon disulfide rubber composite insulator by
Step replaces ceramics and glass insulator, becomes the first choice of the insulator of ultra-high-tension power transmission line.Liquid silastic is since viscosity is low, stream
The advantages that moving good property, high yield rate is widely used in manufacturing the external insulation of the hollow combined insulator or casing in substation.Room
Coating material of the temperature vulcanizable silicone rubber as ceramics and glass insulator, plays important in the resistance to pollution flashover performance for improving them
Effect.Then, such as the situation in closed Electrode in Gas Insulated System or vacuum insulation systems, this exhausted using atmosphere as master
In the open Electrode in Gas Insulated System of edge, insulator or insulating part surface are equally the weakest region of system insulation, or even compare
The situation of closed Electrode in Gas Insulated System or vacuum insulation systems is more serious (due to open environment).This is because charge is easy to
It is accumulated on insulator surface, while moisture and pollutant can adsorb on insulator surface, so that electric discharge or breakdown are easy to edge
Insulator surface occur.It is well known that high voltage direct current (HVDC) power transmission and distribution have many than high-voltage alternating (HVAC) power transmission and distribution
Advantage, China are greatly developing HVDC power transmission and distribution.And the accumulation of the surface of charge and pollutant or influence are than existing at HVDC
It is more serious under HVAC, make creeping discharge or flashover be easier to occur.Therefore, how to improve silicon rubber insulator or insulating part is (outstanding
It is at HVDC) flashover voltage be for a long time both at home and abroad the most pay close attention to the problem of one of, realize have important engineering
Meaning and value.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to mention significantly
The method of high silicon rubber flashover voltage, this method only need to implement simple and easy, cost to business silicon rubber insulator or insulating part
Cheap surface vapor processing.
The purpose of the present invention can be achieved through the following technical solutions:
A method of for improving silicon rubber flashover voltage, this method is to use fluorine-containing mixing in confined reaction room
Gas carries out fluorination treatment to silastic surface, to improve the flashover voltage of silicon rubber.
Further, described includes fluorine gas and inert gas containing fluorine mixed gas.
Further, the inert gas is nitrogen or helium.
The inert gas is nitrogen as a preferred technical solution,.
Further, described containing in fluorine mixed gas, the volumn concentration of fluorine gas is 2-50%.
Containing in fluorine mixed gas described in as a preferred technical solution, the volumn concentration of fluorine gas are 10-20%.
Further, during the fluorination treatment, temperature is room temperature to 100 DEG C, pressure 0.1-2bar, and the time is
10min-24h。
As a preferred technical solution, during the fluorination treatment, temperature is 55-85 DEG C, pressure 0.2-1bar,
Time is 30min-2h.
Further, the silicon rubber is silicon rubber insulator or silicon rubber insulation part.
Further, after perfluorinated processing, the silastic surface forms nano-structured fluorination surface layer.
Further, the fluorination skin depth is 0.2-2 μm.
The fluorination skin depth is 0.4-1.2 μm as a preferred technical solution,.
Further, external insulation of the silicon rubber for outdoor or indoor open spaces.
The present invention is in confined reaction room, under the conditions of suitable temperature and pressure, using by fluorine gas and inert gas group
At gaseous mixture to silastic surface carry out right times fluorination treatment, make its surface layer have suitable physical chemical characteristics, finally
The flashover voltage of silicon rubber is improved, this method technical process is simple, controllability is good, economic cost is low, can equably be modified in batches
Silicon rubber insulator or insulating part with arbitrary shape and size, especially suitable for commercial applications, and the method for the present invention produces
Raw flashover voltage improves highly significant.
Mentality of designing of the invention is: since silicon rubber is heavily dependent on as the performance quality that external insulation is applied
Its surface or surface performance, therefore the surface layer of silicon rubber is suitably modified, the raising of its flashover performance can be realized.Through the present invention
Modified silicon rubber, DC flashover in an atmosphere significantly improve 30-60% (depending on fluorination conditions and silicon rubber
Type or formula).
Compared with prior art, the invention has the characteristics that:
1) present invention uses a kind of simple process, technology maturation, extremely effective gas-phase modification method, only changes silicon rubber
Insulate surface layer physical chemical characteristics, do not change its any body characteristics and characteristic, and be different from " physics coating ", the fluorinated surface layer with
Unfluorinated interior interlayer is the entirety of one " organic (chemistry) combines ".
2) the method for the present invention is used, the flashover voltage of silicon rubber can be improved significantly under wide fluorination conditions, is applicable in model
Enclose that wide, practicability is good.
3) the method for the present invention economic cost is low, controllability is good, can batch is equably modified has arbitrary shape and size
Silicon rubber insulator or insulating part, particularly suitable for commercial applications.
Detailed description of the invention
Fig. 1 is the silicon rubber insulator or insulating part gas phase fluorination processing system schematic diagram of the method for the present invention；
Fig. 2 be through the method for the present invention (embodiment 3) before modified after silicon rubber decaying Total Reflection Infrared spectrum；
Fig. 3 be through the method for the present invention (embodiment 3) before modified after silicon rubber C1s and Si 2p x-ray photoelectron spectroscopy；
Fig. 4 is the section electron microscopic mirror image through the method for the present invention (embodiment 3) modified silicon rubber；
Fig. 5 be through the method for the present invention (embodiment 3) before modified after silicon rubber surface electronic microscopic iage；
Fig. 6 is sample/finger electrodes structural schematic diagram used in flashover test in following embodiments, wherein two opposite
Stainless steel finger electrodes end between spacing be 10mm, print with a thickness of 2.5mm；
Fig. 7 is the direct current of unfluorinated silicon rubber and the silicon rubber through the method for the present invention fluorinated modified (embodiment 1,3,5)
The Weibull distribution figure of flashover voltage；
Fig. 8 is the staged boosting mode that flashover test uses；
Description of symbols in figure:
1-fluorination room, 2-vacuum pumps, 3-dry type exhaust treatment systems, 4-stainless steel finger electrodes, 5-prints, 6-
Tetrafluoroethene bolt, the support of 7-organic glasses.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Referring initially to Fig. 1.The technical process of the method for the present invention is simple, is first placed in silicon rubber insulator or insulating part
It is fluorinated in room, three times by reactor " vacuumize and inert gas replacement "；Then fluorine gas/inert gas gaseous mixture is introduced into fluorination
In room, silicon rubber insulator or insulating part are carried out at gas phase fluorination under the wide fluorination conditions described in " summary of the invention "
Reason；After reaction again will in fluorination room " vacuumize and inert gas replacement " three times, i.e., in openable fluorination room, taking-up silicon
Rubber insulator or insulating part.
Please refer to Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The method of the present invention be mainly by fluorine atom replace silicon rubber methyl and
Fluohnated hydrocarbon radical (the CH of similar fluorine silicone rubber is connected on silicon atom2-CH2-CmH(2m+1-n)Fn), thickness is formd in silastic surface
The fluorinated layer that degree is 0.2-2 μm.The internal stress and possibility that the change of these chemical composition and structures produces in surface layer simultaneously
The strand chain rupture caused, therefore the physical structure on its surface layer is changed, make surface nano-structure.These are chemically and physically
Variation changes the basic electric property energy (such as increasing the surface transmission channel of charge) of silastic surface, improves it to reach
The purpose of flashover voltage.
In detail as the following examples described in and Fig. 7 typical consequence (embodiment 1,3,5) shown by, with without this
The modified silicon rubber in inventive method surface layer is compared, using the modified silicon rubber of the method for the present invention, direct current flashover in an atmosphere
Voltage improves 30-60% (depending on fluorination conditions and the type or formula of silicon rubber).Therefore, the method for the present invention is to raising silicon
The DC flashover effect highly significant of rubber has apparent practical application value.
Each embodiment of following a kind of cited methods for significantly improving silicon rubber flashover voltage, as shown in fig. 6, making
With the silicon rubber sheet specimens of identical stainless steel finger electrodes and 2.5mm thickness, carried out in laboratory environment.In addition, such as Fig. 8
Shown, voltage is first risen to 13kV, simultaneously with the rate of pressure rise of 1.6kV/s by the way of direct current, staged boosting by flashover test
10min is maintained, 0.5kV is then brought the voltage up every time, maintains 10min, until edge flashing occurs for sample.
Embodiment 1:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 55 DEG C, and pressure 1bar, fluorine gas accounts for reaction
Property mixed gas volumn concentration be 12%, time of fluorination treatment is 60.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.80 μm,
50.3% is improved before the opposite fluorination of DC flashover.
Embodiment 2:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 65 DEG C, and pressure 0.8bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 12%, and the time of fluorination treatment is 30min.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.72 μm,
51.9% is improved before the opposite fluorination of DC flashover.
Embodiment 3:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 85 DEG C, and pressure 1bar, fluorine gas accounts for reaction
Property mixed gas volumn concentration be 12%, time of fluorination treatment is 2h.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 1.14 μm,
35.8% is improved before the opposite fluorination of DC flashover.
Embodiment 4:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 10 DEG C, and pressure 0.5bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 15%, and the time of fluorination treatment is for 24 hours.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.24 μm,
32.6% is improved before the opposite fluorination of DC flashover.
Embodiment 5:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 100 DEG C, and pressure 2bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 2%, and the time of fluorination treatment is 90min.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.50 μm,
59.3% is improved before the opposite fluorination of DC flashover.
Embodiment 6:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 25 DEG C, and pressure 0.1bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 50%, and the time of fluorination treatment is 12h.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.35 μm,
45.7% is improved before the opposite fluorination of DC flashover.
Embodiment 7:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 35 DEG C, and pressure 0.3bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 20%, and the time of fluorination treatment is 4h.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.42 μm,
40.7% is improved before the opposite fluorination of DC flashover.
Embodiment 8:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 100 DEG C, and pressure 1.2bar, fluorine gas accounts for
The volumn concentration of reactive mixed gas is 10%, and the time of fluorination treatment is 10min.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 0.38 μm,
55.0% is improved before the opposite fluorination of DC flashover.
Embodiment 9:
The fluorination treatment condition of silicon rubber sample: the temperature of confined reaction room is 85 DEG C, and pressure 1.5bar, fluorine gas accounts for instead
The volumn concentration of answering property mixed gas is 8%, and the time of fluorination treatment is 6h.
The results are shown in Table 1, and silicon rubber sample is fluorinated modified through the surface layer, forms the fluorinated layer with a thickness of 1.98 μm,
30.9% is improved before the opposite fluorination of DC flashover.
The fluorinated layer thickness of the surface fluorination silicon rubber sample of 1 embodiment 1-9 of table and average DC flashover and its sudden strain of a muscle
The percentage improved before the opposite fluorination of network voltage
Embodiment 10:
A method of for improving silicon rubber flashover voltage, this method is to use fluorine-containing mixing in confined reaction room
Gas carries out fluorination treatment to silastic surface, to improve the flashover voltage of silicon rubber.
It wherein, include fluorine gas and inert gas containing fluorine mixed gas, inert gas is nitrogen.Containing in fluorine mixed gas, fluorine gas
Volumn concentration is 2%.
During fluorination treatment, temperature is 100 DEG C, pressure 0.1bar, and the time is for 24 hours.
After perfluorinated processing, silastic surface forms nano-structured fluorination surface layer.Being fluorinated skin depth is 0.2 μm.
Silicon rubber is silicon rubber insulator.External insulation of the silicon rubber for outdoor or indoor open spaces.
Embodiment 11:
A method of for improving silicon rubber flashover voltage, this method is to use fluorine-containing mixing in confined reaction room
Gas carries out fluorination treatment to silastic surface, to improve the flashover voltage of silicon rubber.
It wherein, include fluorine gas and inert gas containing fluorine mixed gas, inert gas is helium.Containing in fluorine mixed gas, fluorine gas
Volumn concentration is 50%.
During fluorination treatment, temperature is room temperature, pressure 2bar, time 10min.
After perfluorinated processing, silastic surface forms nano-structured fluorination surface layer.Being fluorinated skin depth is 1 μm.
Silicon rubber is silicon rubber insulation part.External insulation of the silicon rubber for outdoor or indoor open spaces.
Embodiment 12:
A method of for improving silicon rubber flashover voltage, this method is to use fluorine-containing mixing in confined reaction room
Gas carries out fluorination treatment to silastic surface, to improve the flashover voltage of silicon rubber.
It wherein, include fluorine gas and inert gas containing fluorine mixed gas, inert gas is nitrogen.Containing in fluorine mixed gas, fluorine gas
Volumn concentration is 25%.
During fluorination treatment, temperature is 70 DEG C, pressure 1bar, time 6h.
After perfluorinated processing, silastic surface forms nano-structured fluorination surface layer.Being fluorinated skin depth is 2 μm.
Silicon rubber is silicon rubber insulation part.External insulation of the silicon rubber for outdoor or indoor open spaces.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (9)
1. a kind of method for improving silicon rubber flashover voltage, which is characterized in that this method is used in confined reaction room
Fluorination treatment is carried out to silastic surface containing fluorine mixed gas, to improve the flashover voltage of silicon rubber.
2. a kind of method for improving silicon rubber flashover voltage according to claim 1, which is characterized in that described contains
Fluorine mixed gas includes fluorine gas and inert gas.
3. a kind of method for improving silicon rubber flashover voltage according to claim 2, which is characterized in that described is lazy
Property gas be nitrogen or helium.
4. a kind of method for improving silicon rubber flashover voltage according to claim 2, which is characterized in that described contains
In fluorine mixed gas, the volumn concentration of fluorine gas is 2-50%.
5. a kind of method for improving silicon rubber flashover voltage according to claim 1, which is characterized in that the fluorine
Change in treatment process, temperature is room temperature to 100 DEG C, pressure 0.1-2bar, time 10min-24h.
6. a kind of method for improving silicon rubber flashover voltage according to claim 1, which is characterized in that the silicon
Rubber is silicon rubber insulator or silicon rubber insulation part.
7. a kind of method for improving silicon rubber flashover voltage according to claim 1, which is characterized in that perfluorinated place
After reason, the silastic surface forms nano-structured fluorination surface layer.
8. a kind of method for improving silicon rubber flashover voltage according to claim 7, which is characterized in that the fluorine
Changing skin depth is 0.2-2 μm.
9. a kind of method for improving silicon rubber flashover voltage according to claim 1, which is characterized in that the silicon
External insulation of the rubber for outdoor or indoor open spaces.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960392A (en) * | 2021-09-14 | 2022-01-21 | 河北工业大学 | Aviation insulating material modification method capable of improving flashover voltage and test system thereof |
| CN114015103A (en) * | 2021-11-22 | 2022-02-08 | 中国兵器工业第五九研究所 | Surface fluorination treatment method for silicone rubber ring and anti-sticking application |
-
2019
- 2019-07-30 CN CN201910696739.3A patent/CN110504074A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960392A (en) * | 2021-09-14 | 2022-01-21 | 河北工业大学 | Aviation insulating material modification method capable of improving flashover voltage and test system thereof |
| CN114015103A (en) * | 2021-11-22 | 2022-02-08 | 中国兵器工业第五九研究所 | Surface fluorination treatment method for silicone rubber ring and anti-sticking application |
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Application publication date: 20191126 |