CN105225904A - A kind of fuse - Google Patents
A kind of fuse Download PDFInfo
- Publication number
- CN105225904A CN105225904A CN201510745651.8A CN201510745651A CN105225904A CN 105225904 A CN105225904 A CN 105225904A CN 201510745651 A CN201510745651 A CN 201510745651A CN 105225904 A CN105225904 A CN 105225904A
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- CN
- China
- Prior art keywords
- fuse
- insulator
- cartridge
- cartridge fuse
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
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- Fuses (AREA)
Abstract
In fuse provided by the invention when short circuit current from upper electrode through cartridge fuse electrode stream lower portion electrode, fuse failure under the effect of short circuit current, forms electric arc in the gap between expulsion tube and arc-extinguishing stick.The gas exhausted material gasification of filling in expulsion tube under high arc temperature effect produces a large amount of gas, the a large amount of gases produced spread in gap, therefore rely on this gas electric arc can be blown out when short circuit current zero passage, thus realization employing slit arc quenching method extinguish the electric arc in fuse.And under high arc temperature effect, lost efficacy for the first fixture cartridge fuse is fixed on expulsion tube inwall, make cartridge fuse Automatic-falling under the High Pressure of self gravitation and a large amount of gas, that is once the first fixture lost efficacy, cartridge fuse will under self gravitation and High Pressure Automatic-falling, with existing fuse switch reduce the requirement of fuse to cartridge fuse size.
Description
Technical field
The invention belongs to protective switch of the short circuit technical field, particularly relate to a kind of fuse.
Background technology
Fuse is a kind of protective switch of the short circuit the most frequently used in 10kV distribution line branch line; its have economy, easy to operate, adapt to the features such as outdoor environment is strong, to be therefore widely used in 10kV distribution line branch path as protection and to carry out equipment throwing, cut the use of operation.
The fuse more than 98% used in 10kV distribution line branch path is at present fuse switch, its structure and operation principle are: the upper moving contact and the lower moving contact that are positioned at cartridge fuse two ends in fuse switch rely on fuse to fasten, after upper moving contact is pushed duckbilled projection, upper static contact heads on moving contact, so cartridge fuse is stuck in duckbilled securely.On after fuse failure, moving contact and lower moving contact lose the fastening force of fuse, and under the effect of cartridge fuse self gravitation, upper static contact spring leaf and lower fixed contact spring leaf, cartridge fuse falls rapidly, and circuit is disconnected, excision faulty section circuit.
But above-mentioned this fuse switch is comparatively strict to the dimensional requirement of cartridge fuse: if the long meeting of cartridge fuse is by duckbilled dieback, after causing fuse failure, cartridge fuse can not fall rapidly, electric arc can not be extinguished in time and cause cartridge fuse to burn or explode; If cartridge fuse size is too short, then cause again difficulty of closing a floodgate, contact is bad, produces electric spark.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of fuse, employing slit arc quenching method extinguishes the electric arc in fuse, and reduces the requirement to cartridge fuse size in fuse.Technical scheme is as follows:
The invention provides a kind of fuse, comprising: upper electrode, lower electrode, cartridge fuse electrode, fuse, cartridge fuse, expulsion tube and arc-extinguishing stick; Wherein, described upper electrode and described lower electrode are by described cartridge fuse Electrode connection; Described fuse is positioned at the inside of described cartridge fuse, and described fuse contacts with described cartridge fuse electrode;
Described cartridge fuse is between described arc-extinguishing stick and described expulsion tube, and described cartridge fuse is fixed on the inwall of described expulsion tube by the first fixture, a part for described arc-extinguishing stick is embedded in the inside of described cartridge fuse, is filled with gas exhausted material in described expulsion tube.
Preferably, described upper electrode, described lower electrode, described expulsion tube and described cartridge fuse are sealed in insulator inside.
Preferably, the inlet line of described upper electrode is wrapped in the first insulator, and one end of described first insulator and described insulator are tightly connected;
The egress line of described lower electrode is wrapped in the second insulator, and one end of described second insulator and described insulator are tightly connected.
Preferably, described first insulator and described second insulator adopt rubber integral molding techniques to obtain.
Preferably, described insulator is provided with the opening for loading and unloading described cartridge fuse, and described opening is positioned at the bottom of described insulator;
Described fuse also comprises: the seal cover mated with described opening.
Preferably, the Bottomattached of described seal cover has reflectorized material.
Preferably, the outside of described cartridge fuse is attached with color mark.
Preferably, described upper electrode and described lower electrode adopt petal type contact.
Preferably, described cartridge fuse electrode is fixed on described cartridge fuse by the second fixture.
Preferably, the rated current of described fuse is any one in 6 peaces, 10 peaces, 15 peaces, 20 peaces, 25 peaces, 30 peaces, 40 peaces and 50 peaces.
Compared with prior art, technique scheme tool provided by the invention has the following advantages:
In fuse provided by the invention, upper electrode and lower electrode are by cartridge fuse Electrode connection; Fuse is positioned at cartridge fuse inside, and fuse contacts with cartridge fuse electrode, and cartridge fuse between arc-extinguishing stick and expulsion tube, and is filled with gas exhausted material in expulsion tube, and a part for arc-extinguishing stick is embedded in cartridge fuse inside.Like this when short circuit current from upper electrode through cartridge fuse electrode stream lower portion electrode, fuse failure under the effect of short circuit current, forms electric arc in the gap between expulsion tube and arc-extinguishing stick.The gas exhausted material gasification of filling in expulsion tube under high arc temperature effect produces a large amount of gas, the a large amount of gases produced spread in gap, therefore rely on this gas electric arc can be blown out when short circuit current zero passage, thus realization employing slit arc quenching method extinguish the electric arc in fuse.
And under high arc temperature effect, lost efficacy for the first fixture cartridge fuse is fixed on expulsion tube inwall, make cartridge fuse Automatic-falling under the High Pressure of self gravitation and a large amount of gas, that is once the first fixture lost efficacy, cartridge fuse will under self gravitation and High Pressure Automatic-falling, with existing fuse switch reduce the requirement of fuse to cartridge fuse size.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the explosive view of the fuse that the embodiment of the present invention provides;
Fig. 2 is the schematic diagram after the composition fuse that provides of the embodiment of the present invention;
Fig. 3 is a kind of schematic diagram of arc extinguishing in the fuse that provides of the embodiment of the present invention;
Fig. 4 is the another kind of schematic diagram of arc extinguishing in the fuse that provides of the embodiment of the present invention;
Fig. 5 is the another kind of structural representation of the fuse that the embodiment of the present invention provides;
Fig. 6 is a kind of schematic diagram fixing cartridge fuse electrode in the fuse that provides of the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, it illustrates a kind of structural representation of the fuse that the embodiment of the present invention provides, wherein Fig. 1 is the explosive view of the fuse that the embodiment of the present invention provides, Fig. 2 is the schematic diagram after the composition fuse that provides of the embodiment of the present invention, and described fuse can comprise: upper electrode 11, lower electrode 12, cartridge fuse electrode 13, fuse 14, cartridge fuse 15, expulsion tube 16 and arc-extinguishing stick 17.
Wherein, upper electrode 11 is connected by cartridge fuse electrode 13 with lower electrode 12, upper electrode 11 can connect the first voltage on distribution line by its inlet line, lower electrode 12 connects the second voltage of distribution line by its egress line, and the first voltage is greater than the second voltage, the electric current on such distribution line can flow to lower electrode 12 from upper electrode 11 through cartridge fuse electrode 13.
Fuse 14 is positioned at the inside of cartridge fuse 15, and fuse 14 contacts with cartridge fuse electrode 13, like this when the electric current flowing to lower electrode 12 from upper electrode 11 through cartridge fuse electrode 13, electric current flows through fuse 14 equally, when electric current exceedes the current range that fuse 14 can bear, fuse 14 fuses.Such as, short circuit current when distribution line breaks down exceedes the current range that fuse 14 can bear, and therefore when short circuit current flows through, fuse 14 fuses.That is in embodiments of the present invention fuse 14 be equivalent to everyday home use fuse, when the electric current flowing through fuse exceed its can tolerance range time blown fuse.
In embodiments of the present invention, the type of the current range visual fusion silk 14 that fuse 14 can bear and model and determine, for dissimilar and fuse 14 that is model, the current range that it can bear may be different, the current range of bearing designed when specifically seeing that fuse 14 designs and determining.
Above-mentioned cartridge fuse 15 is between arc-extinguishing stick 17 and expulsion tube 16, and cartridge fuse 15 is fixed on the inwall of expulsion tube 16 by the first fixture (not shown in FIG.), a part for arc-extinguishing stick 17 is embedded in the inside of cartridge fuse 15, is filled with gas exhausted material in expulsion tube 16.
Here it should be noted is that: cartridge fuse 15, be not fit tightly between arc-extinguishing stick 17 and expulsion tube 16, but the first gap is had between cartridge fuse 15 and arc-extinguishing stick 17, the second gap is had equally between expulsion tube 16 and cartridge fuse 15, make when the gas exhausted material in expulsion tube 16 produces a large amount of gas under high temperature action, gas can spread in the first gap and the second gap, by the arc extinction in fuse, as shown in Figure 3 and Figure 4, bent dotted line wherein in Fig. 3 and Fig. 4 represents electric arc, and arrow indicating fuse pipe 15 comes off process.
Wherein the concrete value in the first gap and the second gap is depending on the size of fuse, and the condition of its demand fulfillment is: can make gas rapid spread in the first gap and the second gap, with extinguish fast electric arc.For gas exhausted material, the embodiment of the present invention is not limited to certain gas exhausted material, and it can be any one gas exhausted material existing, or the mixing of multiple gas exhausted material in prior art.
In embodiments of the present invention, can be a kind of solder for the first fixture cartridge fuse 15 is fixed on the inwall of expulsion tube 16, by solder, cartridge fuse 15 is welded on the inwall of expulsion tube 16, like this under high arc temperature effect, its fixation of solder fusing lost efficacy, and cartridge fuse 15 is Automatic-falling under the High Pressure of self gravitation and a large amount of gas.Certainly the first fixture can also adopt other can make the structure of cartridge fuse Automatic-falling under the High Pressure of self gravitation and a large amount of gas in embodiments of the present invention, sets forth no longer one by one this embodiment of the present invention.
As can be seen from technique scheme, when short circuit current flows to lower electrode 12 from upper electrode 11 through cartridge fuse electrode 13, under the effect of short circuit current, fuse 14 fuses, and forms electric arc in the gap between expulsion tube 16 and arc-extinguishing stick 17.The gas exhausted material gasification of filling in expulsion tube 16 under high arc temperature effect produces a large amount of gas, the a large amount of gases produced spread in gap, therefore rely on this gas electric arc can be blown out when short circuit current zero passage, thus realization employing slit arc quenching method extinguish the electric arc in fuse.
And under high arc temperature effect, lost efficacy for the first fixture cartridge fuse 15 is fixed on expulsion tube 16 inwall, make cartridge fuse 15 Automatic-falling under the High Pressure of self gravitation and a large amount of gas, that is once the first fixture lost efficacy, cartridge fuse will under self gravitation and High Pressure Automatic-falling, with existing fuse switch reduce the requirement of fuse to cartridge fuse size.
In embodiments of the present invention, upper electrode 11, lower electrode 12, it is inner that cartridge fuse 15 and expulsion tube 16 are sealed in insulator 18, as shown in Figure 5, because fuse 14 is positioned at the inside of cartridge fuse 15, a part for arc-extinguishing stick 17 is embedded in the inside of cartridge fuse 15, and that can find out that arc-extinguishing stick 17 do not embed cartridge fuse 15 from fuse shown in Fig. 1 is positioned at below upper electrode 11, therefore it is inner that all parts in the fuse shown in above-mentioned Fig. 1 is all sealed in insulator 18, fuse is made to form the structure of a totally-enclosed and all insulation, thus greatly can improve insulation property.
The structure of and all insulation totally-enclosed due to fuse, makes fuse also can relative decrease installing insulating distance, is conducive to installing and using in the position of limited space; Due to its totally enclosed architectural characteristic, each parts in fuse can not occur because corrosion causes upper electrode 11, cartridge fuse electrode 13 and lower electrode 12 to become rusty dead situation under adverse circumstances factor, reduce improper generation of cut-offfing situation, fuse that simultaneously its totally-enclosed and structure that is all insulation makes fuse can not occur to cause because of expansion such as to be pulled off at the unnecessary power outage.And the architectural characteristic of this totally-enclosed and all insulation of fuse, a large amount of gases making expulsion tube 16 produce are easier to be spread in fuse, quickening arc extinguishing efficiency.
Further, the inlet line 19 of upper electrode 11 is wrapped in the first insulator 20, and one end of the first insulator 20 and insulator 18 are tightly connected, the egress line 21 of same lower electrode 12 is wrapped in the second insulator 21, and one end of the second insulator 21 and insulator 18 are tightly connected, like this can by inlet line 19 and egress line 21 and external insulation, and seal between the first insulator 20 and insulator 18, seal between second insulator 22 and insulator 18, fuse provided by the invention is made still to keep totally-enclosed and structure that is all insulation, thus effectively can prevent the dirty impact on inlet line 19 and egress line 21 of dust and salt, strengthen the insulation safety of inlet line 19 and egress line 21, improve the stability of inlet line 19 and egress line 21.
In embodiments of the present invention, first insulator 20 and the second insulator 22 can adopt rubber integral molding techniques to obtain, and the form fit of the part making the first insulator 20 and the second insulator 22 contact with insulator 18 in one-body molded process respectively and insulator 18, as shown in Figure 5, the first insulator 20 and insulator 18 can be made like this to be tightly connected, the second insulator 22 and insulator 18 are tightly connected.
In addition for the ease of handling fuse 14, bottom insulator 18, be provided with opening, like this after fuse 14 fuses, fuse 14 can be changed by opening.And remain totally-enclosed and the structure of power insulating properties to make fuse, the fuse that the embodiment of the present invention provides also comprises: the seal cover 23 mated with opening, as shown in Figure 5.Seal cover 23 is by the closure of openings of insulator 18, sealing can be reinforced to opening further by sealing ring, when the gas exhausted material in expulsion tube 16 produces a large amount of gas under high temperature action, under the High Pressure of a large amount of gas, seal cover 23 is rushed to open, and a part for such cartridge fuse 15 can be stretched out outside insulator 18.And in embodiments of the present invention, for the ease of maintainer, fuse is overhauled, reflectorized material is had at the Bottomattached of seal cover 23, such maintainer by the reflective fuse found on distribution line of reflectorized material, and can find by the reflective of reflectorized material the seal cover 23 come off after seal cover 23 comes off.
In embodiments of the present invention, the outside of cartridge fuse 15 is attached with color mark, therefore when a part for cartridge fuse 15 can be stretched out outside insulator 18, can be known the fuse failure in cartridge fuse 15, so that maintainer changes fuse by color mark.
In above-mentioned all embodiments, upper electrode 11 and lower electrode 12 can adopt petal type contact, the contact of this petal type contact is good, can ensure after powering on that petal type contact connects fastening difficult drop-off, make fuse be in operation can not because of External Force Acting or weather condition voluntarily malfunction fall, and then not easily cause unnecessary power outage to occur.
In addition cartridge fuse electrode 13 can be fixed on cartridge fuse 15 by the second fixture, rocks under external force to avoid cartridge fuse electrode 13 in fuse.Wherein the second fixture can be fixed electrode 24 as shown in Figure 6, and cartridge fuse electrode 13 can be fixed on cartridge fuse 15 by this fixed electrode.
In embodiments of the present invention, the rated current of above-mentioned fuse 14 is any one in 6A, 10A, 15A, 20A, 25A, 30A, 40A and 50A, and it is any one fuse 14 above-mentioned that the fuse that namely embodiment of the present invention provides can choose rated current.
The inlet line 19 of upper electrode 11 and the egress line 21 of lower electrode 12 can use split conductor twist and be processed to form, inlet line 19 and egress line 21 can be made like this to have any bendability, as used multiply insulation annealed copper wire strand and being processed to form, and the pitch of the pitch of inlet line and egress line is less than or equal to default pitch, default pitch is the preset multiple of one insulated wire diameter.Such as presetting pitch is less than 20 times that often thoroughly do away with edge linear diameter.
In order to can make multiply insulate annealed copper wire strand and be processed to form, split conductor can a coaxial direction twist with by split conductor strand and.As split conductor can coaxially be twisted to the right or coaxially twist left.In embodiments of the present invention, the sectional area of per share insulated wire is greater than 8 square metres, is less than or equal to 16 square metres.Certainly, in other application scenarioss, can also choose suitable insulated wire according to the demand of application scenarios, the sectional area for insulated wire is not too much limited.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity and another entity to make a distinction, and not necessarily requires or imply the relation that there is any this reality between these entities.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make equipment not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise the intrinsic key element of equipment.When not having more restrictions, the key element limited by statement " comprising ... ", does not get rid of and also there is other identical element in a device.
To the above-mentioned explanation of the disclosed embodiments, those skilled in the art are realized or uses the present invention.To be apparent for a person skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a fuse, is characterized in that, comprising: upper electrode, lower electrode, cartridge fuse electrode, fuse, cartridge fuse, expulsion tube and arc-extinguishing stick; Wherein, described upper electrode and described lower electrode are by described cartridge fuse Electrode connection; Described fuse is positioned at the inside of described cartridge fuse, and described fuse contacts with described cartridge fuse electrode;
Described cartridge fuse is between described arc-extinguishing stick and described expulsion tube, and described cartridge fuse is fixed on the inwall of described expulsion tube by the first fixture, a part for described arc-extinguishing stick is embedded in the inside of described cartridge fuse, is filled with gas exhausted material in described expulsion tube.
2. fuse according to claim 1, is characterized in that, described upper electrode, described lower electrode, described expulsion tube and described cartridge fuse are sealed in insulator inside.
3. fuse according to claim 2, is characterized in that, the inlet line of described upper electrode is wrapped in the first insulator, and one end of described first insulator and described insulator are tightly connected;
The egress line of described lower electrode is wrapped in the second insulator, and one end of described second insulator and described insulator are tightly connected.
4. fuse according to claim 3, is characterized in that, described first insulator and described second insulator adopt rubber integral molding techniques to obtain.
5. fuse according to claim 2, is characterized in that, described insulator is provided with the opening for loading and unloading described cartridge fuse, and described opening is positioned at the bottom of described insulator;
Described fuse also comprises: the seal cover mated with described opening.
6. fuse according to claim 5, is characterized in that, the Bottomattached of described seal cover has reflectorized material.
7. fuse according to claim 5, is characterized in that, the outside of described cartridge fuse is attached with color mark.
8. fuse according to claim 1, is characterized in that, described upper electrode and described lower electrode adopt petal type contact.
9. fuse according to claim 1, is characterized in that, described cartridge fuse electrode is fixed on described cartridge fuse by the second fixture.
10. fuse according to claim 1, is characterized in that, the rated current of described fuse is any one in 6 peaces, 10 peaces, 15 peaces, 20 peaces, 25 peaces, 30 peaces, 40 peaces and 50 peaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510745651.8A CN105225904A (en) | 2015-11-05 | 2015-11-05 | A kind of fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510745651.8A CN105225904A (en) | 2015-11-05 | 2015-11-05 | A kind of fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105225904A true CN105225904A (en) | 2016-01-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510745651.8A Pending CN105225904A (en) | 2015-11-05 | 2015-11-05 | A kind of fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105225904A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367070A (en) * | 2013-07-08 | 2013-10-23 | 桐乡市供电局 | Arc extinguishing structure of fuse |
| CN103545154A (en) * | 2013-11-04 | 2014-01-29 | 国家电网公司 | Fuse protector |
-
2015
- 2015-11-05 CN CN201510745651.8A patent/CN105225904A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367070A (en) * | 2013-07-08 | 2013-10-23 | 桐乡市供电局 | Arc extinguishing structure of fuse |
| CN103545154A (en) * | 2013-11-04 | 2014-01-29 | 国家电网公司 | Fuse protector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160106 |
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| RJ01 | Rejection of invention patent application after publication |