CN101635233B - Insulating enclosed type pagoda-shaped fuse - Google Patents
Insulating enclosed type pagoda-shaped fuse Download PDFInfo
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- CN101635233B CN101635233B CN 200810040902 CN200810040902A CN101635233B CN 101635233 B CN101635233 B CN 101635233B CN 200810040902 CN200810040902 CN 200810040902 CN 200810040902 A CN200810040902 A CN 200810040902A CN 101635233 B CN101635233 B CN 101635233B
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- 239000010931 gold Substances 0.000 claims description 28
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to an insulating enclosed type pagoda-shaped fuse (1), which comprises upper and lower lead-out wires (6 and 7), upper and lower chambers (8 and 9) in the fuse, upper and lower fixed contacts (11 and 22), an arc extinction cylinder (15) and a fuse carrier (28) inserted into the arc extinction cylinder; the opening position at the lower end of an insulator body is fixed with a lower cover (24); the lower cover (24) is detachably provided with a cover body (26) of a penetrating pressure releasing hole (25); and the surface leakage distance of the fuse is more than 350mm. The insulating enclosed type pagoda-shaped fuse can instantly discharge high-pressure gas instantly generated through the pressure releasing hole to relieve the damage to components in the fuse; and in addition, the power frequency withstand voltage of the fuse is higher (dry flashover is between 42 and 48kv, and wet flashover is 30kv), the breaking performance of 12kv reaches Sym. 8kA, and the safety performance of the hot-line work is improved.
Description
Technical field
The present invention relates to a kind of high-tension fuse, particularly, the present invention relates to the insulating enclosed type pagoda-shaped fuse that a kind of transformer or distribution line protection are used, its internal equipment has fusing carrier.Insulating enclosed type pagoda-shaped fuse of the present invention is specially adapted to the transformer of 10kV and above distribution system thereof or the protection of distribution line.
Background technology
In the past, for protection transformer or distribution line, often used fuse switch.
On-load fuse switch (hereinafter to be referred as fuse) is applicable to that rated voltage 10kV, rated current 200A are following, in the distribution line and distribution transformer of frequency 50Hz, as overload and short-circuit protection and branch, the usefulness of closing the rated load electric current.
Its products characteristics: fuse is made up of pedestal, arc-extinction device two large divisions.When fuse is in closing position, dynamic and static contact is by the compression spring compression, to guarantee between contact enough pressure being arranged, rotating torque spring is equipped with in the expulsion tube lower end, after melt is packed into, torque spring is namely tightened, and makes fuse be in tension, to guarantee expulsion tube self-locking when the closing position.
When circuit overload or the fusing of short circuit melt, fuse is pulled out in fusion tube rapidly by means of the effect of torque spring, and the heat energy of electric arc produces a large amount of arc extinguishing gases in fusion tube simultaneously, and electric arc is extinguished rapidly, to reduce the loss of arcing time and arc extinguishing material.Behind the arc extinction, fusion tube falls under the effect of deadweight and bridge-shaped contact compression spring automatically, realizes obviously visible fracture.But its shortcoming is:
(1) product technology is coarse, and workmanship is poor, and touch spring elasticity deficiency causes the contact loose contact and to produce spark overheated.
What (2) the fusion tube rotation axis was made is coarse dumb, make the fusion tube angle not reach the rules requirement, especially the fusion tube size majority of Pei Beiing does not reach the rules requirement, fusion tube is long with the duckbilled dieback, cause melt fusing back fusion tube not fall rapidly, in time with arc cutting, extinguish, cause fusion tube to burn or explode; The fusion tube size is short, the difficulty of closing a floodgate, and the contact loose contact produces electric spark, or it is dead to take place to get an electric shock.
(3) the fuse rated breaking-capacity is little, and its lower limit is less than the three-phase shortcircuit capacity of protected system.At present, 10kV outdoor drop-out type fuse is divided into three types, i.e. 50A, 100A, 200A.The breaking capacity upper limit of 200A fuse switch is 200MVA, and lower limit is 20MVA.According to the ability of its rupturing capacity, we are not difficult to find out, timely arc extinguishing after melt fusing during short trouble also makes fusion tube burn easily or explodes.
(4) some new switch fusion tube size and fuse fixed contact divide the size coupling improper, very easily loosening, run into external force effect, vibration or strong wind weather in case be in operation, just malfunction and falling voluntarily, not only reduce electricity sales amount, and be difficult to guarantee the power supply reliability index.
In view of the existence of above-mentioned several respects defective, common way in recent years is that insulating enclosed type fuse is fixed on the cross-arm of the electric post on the distribution line with the installation gold utensil.
Insulating enclosed type fuse is a kind of indoor fuse.Be the interior sealing cartridge fuse that fills quartz sand filler, melt fusing when it passes through overload current or short circuit current, free gas after its metal vapors and the arcing is subjected to the effect of HTHP, spray into the space between the quartz sand, contact with quartz sand surface and to be subjected to cooled and solidified, reduce free gas and the metal vapors of melt evaporation back stay in fossula, thereby made the electric current natural zero-crossing, forced arc extinction.
When melt fused, the backguy of fuse spring was also broken simultaneously, and ejected in bourdon tube.Top fixed contact (top fixed electrode) and bottom fixed contact (bottom fixed electrode) are set in insulator body, fusing carrier (fuse unit) is installed between top fixed contact and bottom fixed contact.In fusing carrier, taken in fuse element (melt) and fuse lead-in wire, fuse element fuses when distribution line is flowed through electric current above setting, thus, disconnects distribution line.
(for example, referring to invention document 1)
Invention document 1-Chinese patent application ZL 02285265.4
Fuse according to foregoing invention document 1 provides for preventing destruction or the induction of electric shock casualties accident at the environmental impact that suffers salt dust hazard and chemical gas etc., arranges fuse in porcelain pagoda-shaped insulator.
Yet, in the time of in the structure that is fixed in the installation gold utensil that is installed on insulator body portion on the electric post cross-arm, be in ground state because gold utensil is installed, therefore, the charging part in insulator body and over the ground between the weakness of distance become the main part of insulator body.For this reason, need act on the stable design that voltage distribution between gold utensil and the fuse is installed.As not addressing the above problem, then between installation gold utensil and fusing carrier, cause electric field to be concentrated, produce the corona discharge phenomenon.
In addition, in the past, though fixedly there are lower cover (24) and lid (26) thereof in the lower ending opening portion in insulator body, but press the hole because not putting, press the hole to emit at the instantaneous gases at high pressure of instantaneous generation that can't make of fusing by putting, thereby cause the damage to the parts in the fuse, influence its useful life.
Have, in the past, the surface leakage of fuse distance between 220-275mm, caused its power-frequency withstand voltage lower usually again, and the live line working fail safe descends.Simultaneously, insulating enclosed type fuse whole height in the past is many about 400-425mm, causes reaching enough surface leakage distances at the fuse of the umbrella skirt construction of common band fin, makes that its power-frequency withstand voltage is lower.In addition, fuse element (melt) length is many about 200-245mm, causes the live line working fail safe to descend.
Make its withstand voltage receive restriction.The 12kv break performance is about Sym.4kA.
Summary of the invention
The present invention does for addressing the above problem.The objective of the invention is to: a kind of insulating enclosed type pagoda-shaped fuse is provided, and insulating enclosed type pagoda-shaped fuse of the present invention can not occur in installs the problem that produces corona discharge between gold utensil and fuse, also can not cause the induction of electric shock accident; The insulating enclosed type pagoda-shaped fuse of invention presses the hole to emit at the instantaneous gases at high pressure of instantaneous generation that make of fusing by putting, and alleviates the damage to the parts in the fuse; The power-frequency withstand voltage of fuse of the present invention higher (do and dodge 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA, and the live line working security performance improves.
For achieving the above object, technical scheme of the present invention is as follows.
A kind of insulating enclosed type pagoda-shaped fuse, comprise: insulator body, be positioned at insulator body on, on bottom fixed contact and the correspondence thereof, the bottom contact, be positioned at, extinguishing arc tube between the fixed contact of bottom, fusing carrier, fuse element and lead-in wire thereof in the fusing carrier, be positioned at lower cover and the lid of insulator body bottom, via insulator body connect above-mentioned parts on, the bottom lead-out wire, be formed with upper chamber and continuous in the lower chamber of this upper chamber bottom in the inside of insulator body, it is characterized in that, the extinguishing arc tube is to be sheathed on the outer insulating cylinder of fusing carrier, its upper end is inserted with the arc-extinguishing stick that is arranged at the top fixed contact, the whole guide part of making the cone-shaped enlarged diameter towards the below that forms, the surface leakage distance of described fuse is more than 350mm.
Thus, cause its power-frequency withstand voltage of insulating enclosed type pagoda-shaped fuse of the present invention higher, do and dodge 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA.The live line working fail safe increases substantially.
" the surface leakage distance " of so-called fuse namely refers to usually: from installation portion that gold utensil uses being installed to described fuse top, because connecting the distance of creeping up and down that the top lead-out wire makes the fuse outer surface of the fin exposed blank area of this top lead-out wire, comprise its umbrella skirt construction along fuse.
More properly, " surface leakage distance " of so-called fuse namely refer to: from installation portion that gold utensil uses comprises the fin of its umbrella skirt construction to described fuse top, along fuse the actual range of creeping up and down of fuse outer surface is installed.
In the past, the surface leakage of fuse distance was usually between 200-250mm.Can't satisfy requirements at the higher level.The surface leakage of described fuse of the present invention is apart from controlling more than 350mm, be to control between the 350-400mm better, thus, can improve the power-frequency withstand voltage of insulating enclosed type pagoda-shaped fuse of the present invention, do and dodge 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA.The live line working fail safe increases substantially.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, in the lower ending opening portion of insulator body lower cover is arranged fixedly, lower cover releasably is equipped with and forms the lid of pressing the hole of putting that connects.
Press the hole by forming at lid to put, can be instantaneous in fusing, make the gases at high pressure of instantaneous generation press the hole to emit by putting, alleviate the damage to the parts in the fuse.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, described fuse whole height is 450-495mm.
Described fuse whole height, namely the distance at supreme end toper top, whole fuse bottom is controlled to be 450-495mm.Thus, can adopt the common fuse umbrella skirt construction that has lug, nib, both can reach the surface leakage distance of described fuse more than 350mm.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably,
Form the installation gold utensil installation portion of heavy wall, wide size at the body of the cylindric insulator body that is formed by porcelain.Described installation gold utensil is with the porcelain wall of installation portion 3 formation 30-40mm heavy walls, so that its external diameter and top lug, nib external diameter are roughly the same.
Thus, in the time of in the structure that is fixed in the installation gold utensil that is installed on insulator body portion on the electric post cross-arm, be in ground state because gold utensil is installed, therefore, the charging part in insulator body and over the ground between the weakness of distance become the main part of insulator body.Between installation gold utensil and fusing carrier, be not easy to cause electric field to concentrate, be not easy to produce the corona discharge phenomenon.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, in lower chamber, bottom fixed contact supporting member snaps in the fastening groove on this chamber inner wall, the bottom fixed contact that is made of contact chip and the electrode support plate that is connected in the bottom lead-out wire is fixedly arranged on this supporting member, the inner connection of insulator body disposed fusing carrier, when described fusing carrier inserts in the extinguishing arc tube, releasably be connected in top fixed contact and bottom fixed contact, between top fixed contact and arc-extinguishing stick, be provided with spring, be provided with the tubular top contact that is connected with the top fixed contact on the top of fusing carrier, described fusing carrier comprises: the tubular top contact that is connected with the top fixed contact, bottom at the top contact, built-in with its internal series-connection connection fuse element and fuse lead-in wire state, the insulating cylinder of fusing label is fixedly arranged at the bottom, ends between flange portion and the fusing label being provided with the bottom contact that contacts with the bottom fixed contact at the card of insulating cylinder central portion.
Thus, in the lower chamber 9 in the insulator body 2 since make one fixedly the lower electrode supporting member 19 of bottom fixed contact 22 snap into fastening groove 18 on this chamber inner wall, therefore, its card ends stable, assembling is easy.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, the described arc-extinguishing stick that is arranged at the top fixed contact is " T " word shape, its top is provided with protruding protuberance to horizontal direction, its bar-shaped upper end of inserting the extinguishing arc tube, the state of being pressed to the below by spring from the top is limited to extinguishing arc tube upper end, but described bar-shaped the setting with the upper end of extinguishing arc tube makes its two interoperation carry out extinguishing arc.
According to above-mentioned, owing in the fixed contact of top, arc-extinguishing stick is set, bar-shaped upper end of inserting the extinguishing arc tube of arc-extinguishing stick, bar-shaped the upper end interoperation with the extinguishing arc tube carries out extinguishing arc, therefore, under powering state, go out the occasion that fusing carrier carries out breaking operation from the insulator body withdrawing, also can carry out extinguishing arc to the electric arc that betides between top fixed contact and the top contact from bar-shaped of arc-extinguishing stick and the upper end of extinguishing arc tube.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, the top fixed contact is a pair of elastic contact chip, tubular top contact is done the resilient clamp contact, the embedded fastening groove that is fixedly arranged on the insulator body bottom of bottom fixed contact supporting member, the bottom fixed contact is fixed on the fixed contact supporting member of bottom.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, the bottom fixed contact is provided with a pair of elastic contact chip, and the bottom contact is made resilient clamp.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, the bottom contact is provided with a nut portion, is used for the end of the fixing fuse lead-in wire upwards of turning back from the lower end of insulating cylinder.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, on the fixed contact supporting member of bottom and between the stage portion of upside, be provided with buffer unit.
Thus, owing to be provided with buffer unit at the upside of bottom fixed contact, the butt of fusing carrier can be inserted and be defined in certain position.When fuse element fuses, also can cushion the impulse force that makes progress that betides fusing carrier again.
According to insulating enclosed type pagoda-shaped fuse of the present invention, preferably, fuse element (melt) length is between 300-345mm.Guarantee its fuse performance thus.
According to insulating enclosed type pagoda-shaped fuse of the present invention, can not occur in the problem that produces corona discharge between gold utensil and fuse of installing, can not cause the induction of electric shock accident yet, the insulating enclosed type pagoda-shaped fuse of invention, press the hole to emit at the instantaneous gases at high pressure of instantaneous generation that make of fusing by putting, alleviate the damage to the parts in the fuse, the power-frequency withstand voltage of fuse of the present invention is higher (to be done and dodges 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA, and the live line working security performance improves.
The simple declaration of accompanying drawing
Figure 1 shows that the cutaway view that is in the insulating enclosed type pagoda-shaped fuse under the installment state.
Figure 2 shows that insulating enclosed type pagoda-shaped fuse M of the present invention, N, and the key diagram of O distance.
Among the figure, 1 insulating enclosed type pagoda-shaped fuse, 2 is insulator body, 4 for installing gold utensil, 5 is cross-arm, and 6 is the top lead-out wire, and 7 is the bottom lead-out wire, and 8 is upper chamber, 9 is lower chamber, and 11 is the top fixed contact, and 15 is the extinguishing arc tube, and 22 is the bottom fixed contact, 24 is lower cover, and 26 is lid, and 28 is fusing carrier, 29 is the top contact, and 31 is insulating cylinder, and 32 is fuse element, 33 are the fuse lead-in wire, and 34 are the fusing label, and 36 is the bottom contact.M is the surface leakage distance of described fuse, and N is the fuse whole height, i.e. the distance at supreme end toper top, whole fuse bottom, and O is fuse element (melt) length.
Embodiment
Below, with reference to Fig. 1, describe with regard to first example of the present invention.
A kind of insulator body 2 of insulating enclosed type pagoda-shaped fuse 1 is formed cylindricly by porcelain, form a plurality of tops lug, nib on the top of insulator body 2, forms at its body gold utensil installation portion 3 and a plurality of bottoms lug, nib are installed, and forms cylindrical portion in its underpart.The porcelain wall that gold utensil installation portion 3 forms heavy wall is installed, and its wall thickness is in the scope of 30-40mm, so that its external diameter and top lug, nib external diameter are roughly the same.
Install to be equipped with on the gold utensil installation portion 3 gold utensil 4 is installed, by gold utensil 4 is installed pagoda-shaped fuse 1 is fixed on the electric post cross-arm 5.
On the top of insulator body 2, by rubber mass conical part set top lead-out wire 6.The bottom lead-out wire is bonded to insulator body 2 bottoms by the rubber mass conical part.
Be formed with upper chamber 8 in the inside of insulator body 2 and continuously in the lower chamber 9 of the bottom of this upper chamber 8, between upper chamber 8 and lower chamber 9, be formed with the major diameter stage portion 10 of indent.
In addition, be formed with a fastening groove 18 at lower chamber 9 inwalls.
The upper end of the upper chamber 8 in insulator body 2 is provided with the top fixed contact 11 that is connected with top lead-out wire 6, and top fixed contact 11 is spirally connected and is fixed in top lead-out wire 6.Thus, top fixed contact 11 is connected in distribution line by top lead-out wire 6.
In the present embodiment, the surface leakage of described fuse apart from M at 350-400mm.Herein, " surface leakage distance " of so-called fuse can refer to: from installation portion 3 that gold utensil 4 usefulness are installed to described fuse top because connecting the distance of creeping up and down that top lead-out wire 6 makes the fuse outer surface of the fin exposed blank area of this top lead-out wire 6, comprise its umbrella skirt construction along fuse.Namely from installation portion 3 to described fuse top again the connector portions office of the top lead-out wire 6 in the place ahead, comprise the distance of creeping up and down of fuse outer surface of the fin of its umbrella skirt construction along fuse
In the past, the surface leakage of fuse distance was usually between 200-250mm.Can't satisfy requirements at the higher level.The surface leakage of described fuse of the present invention is apart from controlling more than 350, present embodiment control is between 350-385mm, thus, (power-frequency withstand voltage is the voltage (electric pressure and capacity according to electrical equipment are determined) that ac electric apparatus carries out can bear in the withstand voltage test defined can to improve the power-frequency withstand voltage of insulating enclosed type pagoda-shaped fuse of the present invention, because industrial frequency (China is 50Hz) is adopted in withstand voltage test, therefore be called power-frequency withstand voltage.), do and dodge 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA.The live line working fail safe increases substantially.
In the present embodiment, described fuse whole height, namely supreme end toper top, whole fuse bottom apart from N, be controlled to be 475-495mm.Thus, can adopt the common fuse umbrella skirt construction that has lug, nib, both can reach the surface leakage distance of described fuse more than 350mm.Improve the versatility of fuse of the present invention.
In the present embodiment, form installation gold utensil (4) installation portion (3) of heavy wall, wide size at the body of the cylindric insulator body (2) that is formed by porcelain, described installation gold utensil is the porcelain wall of the heavy wall of 30-40mm with installation portion (3), so that its external diameter and top lug, nib external diameter are roughly the same.
Top fixed contact 11 forms a pair of resilient sheet-like, and tubular top contact 29 is made resilient clamp.
Downside in the upper chamber 8 of insulator body 2, be provided with extinguishing arc tube 15 cylindraceous, above-mentioned extinguishing arc tube is for being sheathed on insulating cylinder fusing carrier (fuse unit) outside, has for insertion to be arranged at the upper end 13 of the interior arc-extinguishing stick 12 of top fixed contact 11 and to make the guide part 14 of taper enlarged diameter.When described fusing carrier inserts in the extinguishing arc tube, releasably be connected in top fixed contact and bottom fixed contact.
Arc-extinguishing stick 12 in the above-mentioned top fixed contact 11 is provided with protruding a pair of protuberance 16 to horizontal direction and is carried out bar-shaped 17 of extinguishing arc with the upper end interoperation of extinguishing arc tube 15 by its top and forms " T " word shape.Fusing carrier 28 on the top of the top of fusing carrier 28 contact 29, under by spring energized state, is pressed in the top fixed contact 11 under the state of inserting as shown in Figure 1.The top contact 29 of fusing carrier 28 keeps in touch in the state of top fixed contact 11.
Described fusing carrier (fuse unit) comprising: the tubular top contact 29 that is connected with top fixed contact 11, connect fuse element 32 and the fuse insulating cylinder 31 that 33 states are built-in, the label that fuses fixedly is arranged at the bottom that goes between with its internal series-connection, be arranged at insulating cylinder 31 central authorities on the lower side the card of portion end flange portion 35 and fusing is provided with the bottom contact 36 that contact with bottom fixed contact 22 between the label 34, be arranged between bottom contact 36 and the fusing label, insulating cylinder 31 imposed the force application component 37 of the application of force outside the insulator body.
In the lower chamber 9 of insulator body 2, bottom fixed contact supporting member 19 snaps in fastening groove 18.The bottom fixed contact 22 that is made of a pair of contact chip 20 and the electrode support plate 21 that is connected in bottom lead-out wire 7 is fixedly arranged on the lower support member 19.
Bottom fixed contact 22 is connected in bottom lead-out wire 7 by connecting line 23.Thus, bottom fixed contact 22 is connected in transformer by bottom lead-out wire 7.
Engaging in the lower ending opening portion of insulator body 2 fixedly has lower cover 24, by leaf spring, releasably is equipped with to be formed with and puts the lid 26 of pressing hole 25 on the lower cover 24.One end of connection cord 27 is connected in lid 26, and the other end is connected in lower cover 24.Lose for preventing that lid 26 from coming off.
Releasably insert fusing carrier 28 from the lower ending opening portion of insulator body 2, fusing carrier 28 inserts in the extinguishing arc tube 15, and following top contact 29 and bottom contact 36 are connected in top fixed contact 11 and bottom fixed contact 22.
The upper end of fusing carrier 28 is provided with the top contact 29 that sandwiches shape contact top fixed contact 11, is provided with the fuse 30 that will be connected in top contact 29 in the bottom of top contact 29 and is accommodated in inner insulating cylinder 31.Fuse 30 forms with fuse element 32 and the fuse lead-in wire 33 that is connected in series.Fuse element (melt) length O is between 300-325mm, to guarantee its fuse performance.
Turning back from the lower end of insulating cylinder 31 upwards in the end of fuse lead-in wire 33, pushes insulating cylinder 31 to top, keeps spring 37 for the application of force state of bottom contact 36, is anchored on bottom contact 36 with nut 38.
Thus, top contact 29 is connected by fuse 30 with bottom contact 36.
The lower end 39 of the top contact 29 of fusing carrier 28 is positioned at the middle part of extinguishing arc tube 15.
Again, be provided with fusing label 34 in the lower external face of insulating cylinder 31, fusing label 34 surfaces can be pasted with and show and paste.End being provided with bottom fixed contact 22 between flange portion 35 and the fusing label 34 at the card of the body of the insulating cylinder 31 that is arranged at described fusing carrier and sandwich the bottom contact 36 that shape contacts.
Between bottom contact 36 and fusing label 34, be provided with insulating cylinder 31 is imposed the force application component (spring) 37 of pushing insulator body 2 outside forces to.
Flow through electric current above setting when making fuse element 32 fusing at distribution line, and fusing label 34 is because the power of the spring 37 of the insulating cylinder 31 that is subjected to fusing carrier 28 protrudes from insulator body 2 outsides.At this moment, fusing label 34 butt lids 26 make lid 26 come off from lower cover 24, and simultaneously, fusing label 34 is again owing to protrude from the lower ending opening portion of insulator body 2, and the fusing situation of fuse 30 is shown in the outside.
At the upside of bottom fixed contact 22, buffer unit 40 is fixing by the stage portion 10 of the top and insulator body 2 of bottom fixed contact support unit 19.40 pairs of fusing carriers of buffer unit 28 limit toward the insertion in the insulator body 2, simultaneously, when fuse element 32 fusing, also can cushion the impulse force that makes progress that betides fusing carrier 28.
Except the surface leakage of described fuse apart from M 385-400mm, other make insulating enclosed type pagoda-shaped fuse of the present invention as embodiment 1.
Except described fuse whole height, namely supreme end toper top, whole fuse bottom is controlled to be 450-475mm apart from N.Outside, other make insulating enclosed type pagoda-shaped fuse of the present invention as embodiment 1.
Embodiment 4
Except described fuse element (melt) length O between the 325-345mm, other make insulating enclosed type pagoda-shaped fuse of the present invention as embodiment 1.
Therefore, according to this example, can obtain following effect.
(1) owing to be formed with the installation gold utensil usefulness installation portion 3 of heavy wall at the body of the cylindrical shape insulator body 2 that is formed by porcelain, fix the installation gold utensil 4 that this heavy section becomes ground state, therefore, can be by the mitigation of the decentralized acquisition electric field density of Electric Field Distribution.
(2) because the lower end 39 of the top contact 29 of fusing carrier 28 is positioned at the position corresponding with the wall thickness of insulator body 2, therefore, although this position belongs to the position that electric field is concentrated, because the wall thickness of this insulator body 2 has been guaranteed insulation distance, thereby provide the ability of corona-resistant.
(3) the lower ending opening portion joint in insulator body 2 fixedly has lower cover 24, making to be provided with to put presses the lid 26 in hole 25 releasably to be installed on the lower cover 24, can prevent the contact to the charging position of insulating enclosed type pagoda-shaped fuse 1 inside when therefore, powering up.
Thus, can prevent the induction of electric shock accident.
Again, nationality is by the disengaging that makes 26 pairs of lower cover 24 of lid, and the fusing that can carry out fuse element 32 shows.Have, during fuse element 32 fusing, the gases at high pressure of generation can be emitted easily from the lower ending opening portion of insulator body 2, alleviate the damage to the parts in the fuse again.
(4) in the lower chamber 9 in the insulator body 2 and since make one fixedly the lower electrode supporting member 19 of bottom fixed contact 22 snap into fastening groove 18 on this chamber inner wall, therefore, its card ends stable, assembling is easy.
(5) owing to the upside at bottom fixed contact 22 is provided with buffer unit 40, therefore, the butt of fusing carrier 28 can be inserted and be defined in certain position.When fuse element 32 fusing, also can cushion the impulse force that makes progress that betides fusing carrier 28 again.
(6) because arc-extinguishing stick 12 is set in top fixed contact 11, bar-shaped 17 upper end 13 of inserting extinguishing arc tube 15 of arc-extinguishing stick 12, upper end 13 interoperations of bar-shaped 17 and extinguishing arc tube 15 carry out extinguishing arc, therefore, under powering state, go out the occasion that fusing carrier 28 carries out breaking operation from insulator body 2 withdrawings, also the electric arc that can betide between top fixed contact 11 and the top contact 29 from 13 pairs of the upper ends of bar-shaped 17 of arc-extinguishing stick 12 and extinguishing arc tube 15 carries out extinguishing arc.
(7) described fuse whole height, namely the distance at supreme end toper top, whole fuse bottom is controlled to be 450-485mm.Thus, the common fuse umbrella skirt construction that has lug, nib can be adopted, the surface leakage distance of described fuse can be reached more than 350mm.
(8) surface leakage of described fuse of the present invention is apart from controlling more than 350mm, be to control between the 350-400mm better, thus, can improve the power-frequency withstand voltage of insulating enclosed type pagoda-shaped fuse of the present invention, do and dodge 42-48kv, the wet 30kv that dodges), the 12kv break performance arrives Sym.8kA.The live line working fail safe increases substantially.
Claims (5)
1. insulating enclosed type pagoda-shaped fuse, comprise: insulator body (2), be positioned at insulator body (2) on, bottom fixed contact (11,22) and on corresponding, bottom contact (29,36), be positioned at, extinguishing arc tube (15) between the fixed contact of bottom, fusing carrier (28), fuse element (32) in the fusing carrier and fuse lead-in wire (33), be positioned at lower cover (24) and the lid (26) of insulator body bottom, via insulator body connect above-mentioned parts on, bottom lead-out wire (6,7), it is characterized in that, be formed with upper chamber (8) and continuous in the lower chamber (9) of this upper chamber bottom in the inside of insulator body, the extinguishing arc tube is for being sheathed on the insulating cylinder outside the fusing carrier (28), and its upper end (13) are inserted with the arc-extinguishing stick (12) that is arranged at the top fixed contact, the whole guide part (14) of making the cone-shaped enlarged diameter towards the below that forms, the surface leakage distance of described fuse is more than 350mm
Described fuse whole height is 450-495mm,
The installation gold utensil (4) that forms heavy wall, wide size at the body of the cylindric insulator body (2) that is formed by porcelain is with installation portion (3),
The lower end of fusing carrier top fixed contact is positioned at the installation gold utensil of insulator body uses the corresponding position of installation portion.
2. insulating enclosed type pagoda-shaped fuse according to claim 1 is characterized in that, described installation gold utensil is with the porcelain wall of the heavy wall of installation portion (3) formation 30-40mm, so that its external diameter and top lug, nib external diameter are roughly the same.
3. insulating enclosed type pagoda-shaped fuse according to claim 1, it is characterized in that, in lower chamber (9), bottom fixed contact supporting member (19) snaps in the fastening groove (18) on this chamber inner wall, this supporting member (19) is gone up fixedly to be had by contact chip (20) and is connected in the bottom fixed contact (22) of electrode support plate (21) formation of bottom lead-out wire, the inner connection of insulator body disposed fusing carrier (28), when described fusing carrier inserts in the extinguishing arc tube, releasably be connected in top fixed contact and bottom fixed contact, between top fixed contact and arc-extinguishing stick, be provided with spring, be provided with the tubular top contact (29) that is connected with the top fixed contact on the top of fusing carrier, described fusing carrier comprises: the tubular top contact (29) that is connected with top fixed contact (11), bottom at the top contact, built-in with its internal series-connection connection fuse element (32) and fuse lead-in wire (33) state, the insulating cylinder (31) of fusing label (34) is fixedly arranged at the bottom, end between flange portion (35) and the fusing label (34) at the card of insulating cylinder central portion and to be provided with the bottom contact that contacts with the bottom fixed contact
Be formed with upper chamber (8) in the inside of insulator body (2) and continuously in the lower chamber (9) of the bottom of this upper chamber (8), between upper chamber (8) and lower chamber (9), be formed with the stage portion (10) of indent, on bottom fixed contact supporting member (19) and between the stage portion (10) of upside, be provided with buffer unit (40).
4. insulating enclosed type pagoda-shaped fuse according to claim 1, it is characterized in that, the described arc-extinguishing stick (12) that is arranged at the top fixed contact is " T " word shape, its top is provided with protruding protuberance to horizontal direction (16), the upper end of extinguishing arc tube is inserted in its bar-shaped (17), the state of being pressed to the below by spring from the top is limited to extinguishing arc tube upper end, described bar-shaped (17) and extinguishing arc tube (15) but the setting of upper end make its two interoperation carry out extinguishing arc.
5. insulating enclosed type pagoda-shaped fuse according to claim 1, it is characterized in that, top fixed contact (11) is a pair of elastic contact chip, tubular top contact (29) is done the resilient clamp contact, the embedded fastening groove (18) that is fixedly arranged on the insulator body bottom of bottom fixed contact supporting member, bottom fixed contact (22) is fixed on the bottom fixed contact supporting member (19), and the bottom fixed contact is provided with a pair of elastic contact chip (20), and bottom contact (36) is made resilient clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810040902 CN101635233B (en) | 2008-07-24 | 2008-07-24 | Insulating enclosed type pagoda-shaped fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810040902 CN101635233B (en) | 2008-07-24 | 2008-07-24 | Insulating enclosed type pagoda-shaped fuse |
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| Publication Number | Publication Date |
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| CN101635233A CN101635233A (en) | 2010-01-27 |
| CN101635233B true CN101635233B (en) | 2013-10-02 |
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| CN 200810040902 Active CN101635233B (en) | 2008-07-24 | 2008-07-24 | Insulating enclosed type pagoda-shaped fuse |
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| CN102779705B (en) * | 2012-08-06 | 2015-01-14 | 象山县供电局 | Fuse |
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| CN106098495A (en) * | 2016-08-24 | 2016-11-09 | 辽宁华隆电力科技股份有限公司 | A kind of injection fuse box |
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| CN106128892A (en) * | 2016-08-24 | 2016-11-16 | 铁岭市世纪电力设备有限公司 | A kind of two-part insulating ceramic injection fuse box with triangle impact head |
| CN106449331A (en) * | 2016-08-31 | 2017-02-22 | 合保电气（芜湖）有限公司 | Full-insulation closed-type load fuse |
| CN109841465B (en) * | 2017-11-24 | 2022-06-17 | 库柏电子科技(上海)有限公司 | Outdoor closed fuse |
| CN108493078A (en) * | 2018-04-17 | 2018-09-04 | 江苏新澳电力技术有限公司 | All insulation protected cut-out |
| CN108711544A (en) * | 2018-05-31 | 2018-10-26 | 西安固之电气科技有限公司 | A kind of protected cut-out |
| CN109637912B (en) * | 2018-12-28 | 2020-09-01 | 北京鼎一致远科技发展有限公司 | Fuse protector |
| CN111952134B (en) * | 2020-07-28 | 2022-03-22 | 湖南特诚成套电器有限公司 | Self-alarming injection type high-voltage fuse |
| CN114512377B (en) * | 2020-11-16 | 2024-04-05 | 爱那其斯株式会社 | Fuse for high voltage fuse |
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| CN2901565Y (en) * | 2006-05-26 | 2007-05-16 | 马辉 | Closed high voltage fuse |
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| CN2901565Y (en) * | 2006-05-26 | 2007-05-16 | 马辉 | Closed high voltage fuse |
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| CN101635233A (en) | 2010-01-27 |
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Owner name: SHANGHAI JIURUI INSULATING INSTRUMENT CO., LTD. AI Free format text: FORMER OWNER: SHANGHAI ELECTRIC POWER TECHNOLOGY DEVELOPMENT CO., LTD.;SUZHOU AIJIAN PORCELAIN CO.,LTD.;SHANGHAI SOUTH POWER SUPPLY ENGINEERING CO., LTD. AINAQISI MOTOR (SHANGHAI) CO., LTD. SHANGHAI FUJIKURA CHENGLONG CABLE ACCESSORY CO., LTD. ENERGY SUPPORT CORP. Effective date: 20121023 |
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Effective date of registration: 20121023 Address after: 201102, 1122 deep road, Pudong New Area, Shanghai Applicant after: Shanghai Electric Power Corporation Applicant after: Shanghai Jiurui Electric Power Insulation Equipment Co., Ltd. Applicant after: Ainaqisi Motor(Shanghai) Co., Ltd. Applicant after: Shanghai Fujikura Chenglong Cable Accessory Co., Ltd. Applicant after: Energy Support Corp. Address before: 201102, 1122 deep road, Pudong New Area, Shanghai Applicant before: Shanghai Electric Power Corporation Applicant before: Shanghai Electric Power Live Working Technology Development Co., Ltd. Applicant before: Ainaqisi Motor(Shanghai) Co., Ltd. Applicant before: Shanghai Fujikura Chenglong Cable Accessory Co., Ltd. Applicant before: Energy Support Corp. |
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Owner name: STATE GRID CORPORATION OF CHINA SHANGHAI JIURUI IN Free format text: FORMER OWNER: SHANGHAI JIURUI INSULATING INSTRUMENT CO., LTD. AINAQISI MOTOR (SHANGHAI) CO., LTD. SHANGHAI FUJIKURA CHENGLONG CABLE ACCESSORY CO., LTD. ENERGY SUPPORT CORP. Effective date: 20121116 |
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Effective date of registration: 20121116 Address after: 201102, 1122 deep road, Pudong New Area, Shanghai Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Applicant after: Shanghai Jiurui Electric Power Insulation Equipment Co., Ltd. Applicant after: Ainaqisi Motor(Shanghai) Co., Ltd. Applicant after: Shanghai Fujikura Chenglong Cable Accessory Co., Ltd. Applicant after: Energy Support Corp. Address before: 201102, 1122 deep road, Pudong New Area, Shanghai Applicant before: Shanghai Electric Power Corporation Applicant before: Shanghai Jiurui Electric Power Insulation Equipment Co., Ltd. Applicant before: Ainaqisi Motor(Shanghai) Co., Ltd. Applicant before: Shanghai Fujikura Chenglong Cable Accessory Co., Ltd. Applicant before: Energy Support Corp. |
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