CN107968350A - A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof - Google Patents
A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof Download PDFInfo
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- CN107968350A CN107968350A CN201711002184.5A CN201711002184A CN107968350A CN 107968350 A CN107968350 A CN 107968350A CN 201711002184 A CN201711002184 A CN 201711002184A CN 107968350 A CN107968350 A CN 107968350A
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- Prior art keywords
- gas
- trifluoroiodomethane
- arc
- extinguishing medium
- friendly type
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/055—Features relating to the gas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The present invention relates to a kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof, the mixed gas arc-extinguishing medium for Sohu of reviving is mainly by trifluoroiodomethane, octafluorocyclobutane (c C4F8) and carbon tetrafluoride (CF4) form, the percent by volume of its component is：20%~25% CF3I, 5%~10% c C4F8, 70% CF4.The mixed gas arc-extinguishing medium can be used for substituting sulfur hexafluoride (SF6) be applied to as novel environment-friendly arc-extinguishing medium in mesolow armored metal enclosed switch equipment.
Description
Technical field
The present invention relates to a kind of arc-extinguishing medium, more particularly, to a kind of mixed gas of the trifluoroiodomethane of gas containing environment-friendly type
Arc-extinguishing medium and preparation method thereof.
Background technology
Using gas isolated mesolow electrical equipment, SF is usually all used6As arc-extinguishing medium.But SF6One, kind very
Strong greenhouse gases, its global warming up trend (global warming potential, GWP) is CO223900 times, and
Due to SF6Chemical property extremely stablize, as long as existence time in an atmosphere is 3200, once leak into air
Substantially will not natural decomposition, therefore the influence to global warming has cumulative effect.In signature in 1997《The Kyoto Protocol》
In, it specify that CO2, CH4, N2O, PFC, HFC and SF6Etc. the scope for belonging to greenhouse gases, and require developed country first by greenhouse
The discharge capacity of gas is frozen in the level of the 1990s, limits the use of or disable substantially SF to the year two thousand twenty6Gas.
Therefore suitable environment-friendly type arc-extinguishing medium need be searched out to substitute SF6, both ensured and SF6With similar arc extinguishing
Performance, and meet the industrial application requirement such as nonhazardous, nonflammable, while will not have a negative impact to environment.
In consideration of it, there is scholar to be proposed with SF6The method that is mixed with buffer gas alleviates SF6Gas is to the unfavorable of environment
Influence.But due to gas arc extinguishing ability reduction after mixing, need to increase pressure on the contrary to ensure arc quenching effect, this undoubtedly will
Increase manufacturing process difficulty and cost, horizontal to the anti-leak of equipment in safety indexes propose harsher requirement.Solve
Certainly SF6Gas greenhouse effects are serious, to the disagreeableness problem of environment, search out suitable SF6It is the most thorough to substitute insulating gas
With effective solution.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of gas containing environment-friendly type
Mixed gas arc-extinguishing medium of trifluoroiodomethane and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type, including volumes below degree
Component：Trifluoroiodomethane gas (CF3I) 20~25%, octafluorocyclobutane gas (c-C4F8) 5-10%, remaining is carbon tetrafluoride
Gas (CF4)。
Preferably, the purity of the trifluoroiodomethane gas is more than or equal to 99%.
Preferably, the purity of the octafluorocyclobutane gas is more than or equal to 99.99%.
Preferably, the purity of the carbon tetrafluoride gas is more than or equal to 99.99%.
The preparation method of the mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type, preferably includes following steps：
(1) closed vessel is taken, a high vacuum valve and bottom inflatable valve are installed in its bottom, its top is provided with
Top inflatable valve；
(2) high vacuum valve goalkeeper's closed vessel is first passed through to vacuumize, then by trifluoroiodomethane gas, octafluorocyclobutane gas
It is filled with from top inflatable valve, carbon tetrafluoride gas is filled with from bottom inflatable valve, after each gas component is filled with by setting content
It is uniformly mixed, that is, obtains purpose product.
Preferably, in step (2), the vacuum in closed vessel meets that it is evacuated to below 10Pa vacuum states.
Preferably, in step (2), in gas replenishment process, trifluoroiodomethane gas, octafluoro ring first are filled with from top inflatable valve
Butane gas, then it is filled with carbon tetrafluoride gas from bottom inflatable valve.
The present invention uses CF3I, octafluorocyclobutane and CF4The mixed gas of composition, wherein, CF3I in terms of electric property also
Show excellent.Under same pressure, dielectric strength can reach more than 1.2 times of sulfur hexafluoride, and arc extinguishing ability is according to drop-out current
Size is slightly different.Component gas CF3Catabolites of the I in the case of electric current is cut-off mainly has iodine, C2F6, C2F4,
C2F5I, C3F8,CHF3, C3F6, CH3I, belongs to low toxicity or innocuous substance.Octafluorocyclobutane, is that one kind is colourless, tasteless, non-combustible
Gas；GWP value is SF61/3, be 8700.With SF6It is smaller compared to the influence to environment.The gas totally nontoxic, ozone free
Influence, pure c-C4F8Dielectric strength of the gas under uniform electric field is about SF61.3 times of gas.Component CF4For buffering
Gas, is mainly used for reducing the condensing temperature of mixed gas and strengthens overall arc extinction performance.The mixing that the present invention eventually forms
The condensing temperature of gas can be reduced to -40 DEG C or so, can meet the requirement in the most areas in China.
Environment-friendly type mixed gas arc-extinguishing medium proposed by the invention can be good at pressure armored metal in meeting at present
The requirement of sealing switch equipment, has the characteristics of arc extinction performance is excellent, good environmental protection.
Compared with prior art, the present invention has the following advantages：
(1) environmental-protecting performance is excellent.CF3The greenhouse effects index of I is only CO25 times, and SF623900 compare, Ji Huke
To ignore.Meanwhile CF3I and CF4Potential all is destroyed without greenhouse, any destruction will not be caused to ozone layer.
(2) arc extinguishing ability is excellent.Cut-off peak value reach 1kA near region short-circuit current when, CF3I-c-C4F8-CF4It is mixed
The arc extinguishing ability of gas is closed with CF3The increase of I gas ratios is exponentially increased.
(3) harm to the human body is small.Point of environment-friendly type mixed gas arc-extinguishing medium proposed by the invention in drop-out current
Solution product is nontoxic or hypotoxicity material, and serious harm will not be caused to human body.
Preparation method proposed by the invention emphasizes sequencing and the position of inflation, the i.e. big CF of density3I、c-C4F8Gas
Body is first filled with closed vessel, the small CF of density from top4It is filled with from bottom, can so reduces mixing time of repose and mix gas
Close more uniform..
Embodiment
A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type, including volumes below degree
Component：Trifluoroiodomethane gas (CF3I) 20~25%, octafluorocyclobutane gas (c-C4F8) 5-10%, remaining is carbon tetrafluoride
Gas (CF4)。
As a preferred embodiment of the present invention, the purity of the trifluoroiodomethane gas is more than or equal to
99%.
As a preferred embodiment of the present invention, the purity of the octafluorocyclobutane gas is more than or equal to
99.99%.
As a preferred embodiment of the present invention, the purity of the carbon tetrafluoride gas is more than or equal to
99.99%.
The preparation method of the mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type, preferably includes following steps：
(1) closed vessel is taken, a high vacuum valve and bottom inflatable valve are installed in its bottom, its top is provided with
Top inflatable valve；
(2) high vacuum valve goalkeeper's closed vessel is first passed through to vacuumize, then by trifluoroiodomethane gas, octafluorocyclobutane gas
It is filled with from top inflatable valve, carbon tetrafluoride gas is filled with from bottom inflatable valve, after each gas component is filled with by setting content
It is uniformly mixed, that is, obtains purpose product.
As a preferred embodiment of the present invention, in step (2), the vacuum in closed vessel meets that it is evacuated to
Below 10Pa vacuum states.
As a preferred embodiment of the present invention, in step (2), in gas replenishment process, first from top inflatable valve
Trifluoroiodomethane gas, octafluorocyclobutane gas are filled with, then carbon tetrafluoride gas is filled with from bottom inflatable valve.
The species of each gas and the selection reason of additive amount are as follows in the present invention：CF3I/CF4Mixed gas, CF3I/c-
C4F8/CF4The current breaking capacity and SF of mixed gas6Gas current connecting-disconnecting function situation as shown in Figure 1, can be with from figure
Find out CF3I/CF4The current breaking capacity of mixed gas is in CF3I contents have basically reached saturation when being 20%, work as CF3I contents
After 20%, then continue to increase CF3I gas content current breaking capacities are held essentially constant.In CF3I/CF4In mixed gas
Fixed CF4After gas is 70%, CF is reduced3I gas contents, add c-C4F8The current breaking capacity of mixed gas such as Fig. 2 institutes afterwards
Show, it can be seen from the figure that adding c-C4F8The current breaking capacity of mixed gas is improved after gas, in c-C4F8
The current breaking capacity of mixed gas is substantially saturated when mixed gas reaches 10%, therefore c-C4F8Content is later right higher than 10%
Improve mixed gas current breaking capacity integrally lifted it is smaller, due to c-C4F8The GWP of gas is 8700, excessively increases the gas
Content can also reduce mixed gas environmental-protecting performance.
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 20%, c-C4F8Volume fraction be 10%, CF4Volume fraction be
70%.The method for obtaining the environment-friendly type arc-extinguishing medium is, first will closing in metal containment unit of the arbitrary height less than 30m
Container is evacuated to below 10Pa vacuum states, then pours c-C successively4F8、CF3I、CF4Gas.Mixed gas standing 48 mixes when small
Uniformly.
Embodiment 2
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 21%, c-C4F8Volume fraction be 9%, CF4Volume fraction be 70%.
The method for obtaining the environment-friendly type arc-extinguishing medium is in metal containment unit of the arbitrary height less than 30m, first to take out closed vessel
To below 10Pa vacuum states, c-C is then poured successively4F8、CF3I、CF4Gas.Mixed gas standing 48 is uniformly mixed when small.
Embodiment 3
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 22%, c-C4F8Volume fraction be 8%, CF4Volume fraction be 70%.
The method for obtaining the environment-friendly type arc-extinguishing medium is in metal containment unit of the arbitrary height less than 30m, first to take out closed vessel
To below 10Pa vacuum states, c-C is then poured successively4F8、CF3I、CF4Gas.Mixed gas standing 48 is uniformly mixed when small.
Embodiment 4
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 23%, c-C4F8Volume fraction be 7%, CF4Volume fraction be 70%.
The method for obtaining the environment-friendly type arc-extinguishing medium is in metal containment unit of the arbitrary height less than 30m, first to take out closed vessel
To below 10Pa vacuum states, c-C is then poured successively4F8、CF3I、CF4Gas.Mixed gas standing 48 is uniformly mixed when small.
Embodiment 5
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 24%, c-C4F8Volume fraction be 6%, CF4Volume fraction be 70%.
The method for obtaining the environment-friendly type arc-extinguishing medium is in metal containment unit of the arbitrary height less than 30m, first to take out closed vessel
To below 10Pa vacuum states, c-C is then poured successively4F8、CF3I、CF4Gas.Mixed gas standing 48 is uniformly mixed when small.
Embodiment 6
Take CF3I、c-C4F8And CF4Physical mixed is carried out at normal temperatures, obtains a kind of environmentally friendly mixed gas arc-extinguishing medium,
In the arc-extinguishing medium, CF3The volume fraction of I is 25%, c-C4F8Volume fraction be 5%, CF4Volume fraction be 70%.
The method for obtaining the environment-friendly type arc-extinguishing medium is in metal containment unit of the arbitrary height less than 30m, first to take out closed vessel
To below 10Pa vacuum states, c-C is then poured successively4F8、CF3I、CF4Gas.Mixed gas standing 48 is uniformly mixed when small.
Mixed gas arc-extinguishing medium prepared by above-described embodiment 1-6 and conventional SF6Relevant nature comparative analysis, its
As a result it is as shown in the table：
It can thus be seen that environment-friendly type mix insulation gas provided by the present invention, can not only reach and SF6Suitable goes out
Arc performance, and environment is influenced to significantly reduce or even eliminated, while condensing temperature also disclosure satisfy that wanting for current engineer application
Ask.
Comparative example 1
Compared with Example 1, except the volumn concentration of each component gas in arc-extinguishing medium is：CF3I volume fractions are
10%, c-C4F8Volume fraction be 20%, CF4Outside 70%, remaining is.
Comparative example 2
Compared with Example 1, except the volumn concentration of each component gas in arc-extinguishing medium is：CF3I volume fractions are
29%, c-C4F8Volume fraction be 1%, CF4Outside 70%, remaining is.
Comparative example 3
Compared with Example 1, except the volumn concentration of each component gas in arc-extinguishing medium is：CF3I volume fractions are
30%, CF4Outside 70%, remaining is.
Comparative example 4
Compared with Example 1, except the volumn concentration of each component gas in arc-extinguishing medium is：c-C4F8Volume integral
Number is 30%, CF4Outside 70%, remaining is.
By mixed gas arc-extinguishing medium prepared by above-mentioned comparative example 1-4 and conventional SF6Relevant nature comparative analysis, its
As a result it is as shown in the table：
As can be known from the above table, c-C is worked as4F8It is opposite with SF under equal conditions when ratio is relatively low (comparative example 2 and comparative example 3)6's
Arc extinguishing ability is relatively low, and only 0.86 or so, work as c-C4F8Content is higher and CF3(comparative example 1 and comparative example when I gas ratios are relatively low
4), mixed gas GWP value is higher, has greater environmental impacts, and environmental-protecting performance reduces and its arc extinguishing ability is substantially saturated and does not show
Write lifting.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using invention.
Person skilled in the art obviously easily can make these embodiments various modifications, and described herein general
Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel disclose according to the present invention, do not depart from improvement that scope made and modification all should be the present invention's
Within protection domain.
Claims (7)
1. a kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type, it is characterised in that including volumes below hundred
Divide the component than content：Trifluoroiodomethane gas 20~25%, octafluorocyclobutane gas 5-10%, remaining is carbon tetrafluoride gas
Body.
2. a kind of mixed gas arc-extinguishing medium of trifluoroiodomethane of gas containing environment-friendly type according to claim 1, its feature
It is, the purity of the trifluoroiodomethane gas is more than or equal to 99%.
3. a kind of mixed gas arc-extinguishing medium of trifluoroiodomethane of gas containing environment-friendly type according to claim 1, its feature
It is, the purity of the octafluorocyclobutane gas is more than or equal to 99.99%.
4. a kind of mixed gas arc-extinguishing medium of trifluoroiodomethane of gas containing environment-friendly type according to claim 1, its feature
It is, the purity of the carbon tetrafluoride gas is more than or equal to 99.99%.
5. the preparation side of the mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type as described in claim 1-4 is any
Method, it is characterised in that comprise the following steps：
(1) closed vessel is taken, a high vacuum valve and bottom inflatable valve are installed in its bottom, its top is provided with top
Charging valve；
(2) high vacuum valve goalkeeper's closed vessel is first passed through to vacuumize, then by trifluoroiodomethane gas, octafluorocyclobutane gas from top
Portion's charging valve is filled with, and carbon tetrafluoride gas is filled with from bottom inflatable valve, and each gas component mixes after being filled with by setting content
Uniformly, that is, purpose product is obtained.
A kind of 6. preparation side of the mixed gas arc-extinguishing medium of trifluoroiodomethane of gas containing environment-friendly type according to claim 5
Method, it is characterised in that in step (2), the vacuum in closed vessel meets that it is evacuated to below 10Pa vacuum states.
A kind of 7. preparation side of the mixed gas arc-extinguishing medium of trifluoroiodomethane of gas containing environment-friendly type according to claim 5
Method, it is characterised in that in step (2), in gas replenishment process, be first filled with trifluoroiodomethane gas, octafluoro ring from top inflatable valve
Butane gas, then it is filled with carbon tetrafluoride gas from bottom inflatable valve.
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| CN201711002184.5A CN107968350A (en) | 2017-10-24 | 2017-10-24 | A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof |
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| CN201711002184.5A CN107968350A (en) | 2017-10-24 | 2017-10-24 | A kind of mixed gas arc-extinguishing medium of the trifluoroiodomethane of gas containing environment-friendly type and preparation method thereof |
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| CN112489852A (en) * | 2020-12-10 | 2021-03-12 | 云南电网有限责任公司保山供电局 | Mixed gas arc-extinguishing medium containing environment-friendly gas heptafluoroisobutyronitrile and preparation method thereof |
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Application publication date: 20180427 |