CN201112314Y - High voltage fuse - Google Patents
High voltage fuse Download PDFInfo
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- CN201112314Y CN201112314Y CNU2007201465622U CN200720146562U CN201112314Y CN 201112314 Y CN201112314 Y CN 201112314Y CN U2007201465622 U CNU2007201465622 U CN U2007201465622U CN 200720146562 U CN200720146562 U CN 200720146562U CN 201112314 Y CN201112314 Y CN 201112314Y
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Abstract
The utility model provides a high voltage fuse which can disconnect circuits in electriferous state. The upper end of an upper chamber of the high voltage fuse is provided with an upper fixed electrode which is connected with an upper terminal. The lower side of the upper chamber of the high voltage fuse is provided with an arc extinguishing tube. A lower chamber is provided with a lower fixed electrode which is connected with a lower terminal. The interior of an insulator of a main body is provided with a fuse tube which connects the upper fixed electrode with the lower fixed electrode and causes the insulator of the main body to be communicated with the arc extinguishing tube. The upper end of the fuse tube is provided with an arc extinguishing bar which coordinates with the arc extinguishing tube to extinguish arc. The lower part of the arc extinguishing bar is provided with an upper contact which is contacted with the upper fixed electrode. In the circuits, once the current exceeding a specified value flows, a fuse component in the high voltage fuse is fused and moved to the bottom through the elastic fuse tube of a spring, thus the upper contact is separated from the upper fixed electrode. In addition, when the fuse tube is detached from the upper fixed electrode in the state that the upper fixed electrode is electriferous, the arc generated between the upper contact and the upper fixed electrode is extinguished in slit by the arc extinguishing bar and the arc extinguishing tube.
Description
Technical field
The utility model relates to a kind of high-tension fuse, in detail, relates to the high-tension fuse that a kind of inside possesses fuse.
Background technology
In the past, all be installation insurance silk tube in the main body insulator of high-tension fuse.In the fuse tube, adorning electrical fuse element.This electrical fuse element and is connected in the lead way that is connected in the top fixed electrode that is located in the main body insulator and bottom fixed electrode.One has the electric current of overrate to flow through in the circuit, and electrical fuse element will fuse, and takes this circuit outage (for example, with reference to utility model document 1.)。
Utility model document 1: China Patent No. ZL02285265.4
Yet, in the high-tension fuse of above-mentioned utility model document 1 record, when having the electric current of overrate to flow through in the circuit, because electrical fuse element is fused, though can cut off the power supply to circuit, but, owing to the top fixed electrode and the bottom fixed electrode of fuse tube still is connected with charging part, so can be dangerous when changing the fuse tube.In addition, in this high-tension fuse, under common electriferous state, can not open and close circuit by on-load.Therefore, people expect to have and a kind ofly fixed electrode can be thrown off from charging part after electrical fuse element fusing, simultaneously, under electriferous state, can on-load open and close the cutout of circuit.
The utility model content
The utility model is made in view of above-mentioned actual conditions, and its purpose is to provide a kind of can throw off fixed electrode after electrical fuse element fusing from charging part, and simultaneously, under electriferous state, the energy on-load opens and closes the high-tension fuse of circuit.
Achieve the above object used technical scheme and action effect thereof below are described.
The utility model provides a kind of high-tension fuse, it is characterized in that: be provided with top electric wire connecting portion on the top of main body insulator, simultaneously, be provided with bottom electric wire connecting portion in the bottom of aforementioned body insulator; Inside at this main body insulator, the bottom compartment that is formed with upper chambers and ins succession with the bottom of above-mentioned upper chambers, upper end in above-mentioned upper chambers, be provided with the top fixed electrode that is connected with above-mentioned top electric wire connecting portion, simultaneously, downside in above-mentioned upper chambers is provided with the extinguishing arc tube, is provided with the bottom fixed electrode that is connected with above-mentioned bottom electric wire connecting portion in above-mentioned bottom compartment; Inside at the aforementioned body insulator, the fuse tube that connects above-mentioned top fixed electrode and above-mentioned bottom fixed electrode is housed, and make it connect above-mentioned extinguishing arc tube, upper end at above-mentioned fuse tube, be provided with and the co-operating of above-mentioned extinguishing arc tube, carry out the arc-extinguishing stick of extinguishing arc, bottom at above-mentioned arc-extinguishing stick, be provided with the top contact that contacts with above-mentioned top fixed electrode, bottom at above-mentioned top contact is provided with cartridge fuse, electrical fuse element and fuse lead are equipped with the state that is connected in series, in the bottom of above-mentioned cartridge fuse in the inside of cartridge fuse, be provided with the bottom contact that contacts with above-mentioned bottom fixed electrode, in above-mentioned fuse tube, be provided with towards the outside of above-mentioned main body insulator the parts of energizing that above-mentioned cartridge fuse is energized; When above-mentioned electrical fuse element is fused, be subjected to the above-mentioned parts effect of energizing, above-mentioned cartridge fuse moves, and makes the top contact throw off from the top fixed electrode.
According to said structure, after the electrical fuse element fusing, be disconnected, so the safety can guarantee to change the fuse tube time by its electrical connection of fuse tube.
Preferably, high-tension fuse of the present utility model, it is characterized in that: be formed with between above-mentioned arc-extinguishing stick and the above-mentioned extinguishing arc tube and be used under the charged state of above-mentioned top fixed electrode, when above-mentioned fuse tube is thrown off from above-mentioned top fixed electrode, with the slit of the electric arc extinguishing arc that produces between above-mentioned top contact and the above-mentioned top fixed electrode.
According to said structure, under the fixed electrode electriferous state of top, when the fuse tube is thrown off from the top fixed electrode, between top contact and top fixed electrode, produce electric arc, because can carry out the slit extinguishing arc, open and close so can carry out the on-load of circuit by arc-extinguishing stick and extinguishing arc tube.
Preferably, high-tension fuse of the present utility model is characterized in that: the upper part of above-mentioned extinguishing arc tube, and between above-mentioned top fixed electrode and aforementioned body insulator.
According to said structure, because having made, the upper part of extinguishing arc tube is between top fixed electrode and the main body insulator, so bottom of top fixed electrode, centered on by the extinguishing arc tube, the position deviation of top fixed electrode just is suppressed, when the fuse tube inserted toward the top fixed electrode, arc-extinguishing stick can be easy to insert by top fixed electrode scraping.Simultaneously, can prevent that the top fixed electrode from contacting with the main body insulator and cause damage.
Preferably, high-tension fuse of the present utility model is characterized in that: above-mentioned top fixed electrode is a tubular, possesses the ring-type limiting part of keeping above-mentioned top fixed electrode internal diameter.
According to said structure, because possess limiting part, so can make the internal diameter of top fixed electrode remain on prescribed level in fixed electrode inside, top.In addition, because when inserting the fuse tube, the guiding of the restricted parts inner face of arc-extinguishing stick, arc-extinguishing stick can be by top fixed electrode shaving, so insert easily.
Preferably, high-tension fuse of the present utility model is characterized in that: above-mentioned top contact and above-mentioned electrical fuse element connect by the switching conductor.
According to said structure, because top contact and electrical fuse element are connected by the switching conductor, thus can strengthen distance between top contact and the electrical fuse element, and the position of reduction electrical fuse element.Its result is pressed in the below in can producing when causing blown fuse because of overcurrent and discharges, thereby can prevent the damage of cartridge fuse.
Preferably, high-tension fuse of the present utility model is characterized in that: the cover plate that possesses sealing aforementioned body insulator peristome.
According to said structure, because possess cover plate, so can prevent main body insulator internal fouling at the peristome of main body insulator.
Preferably, high-tension fuse of the present utility model is characterized in that: in the lower end of above-mentioned fuse tube, possess the guiding parts of the above-mentioned fuse lead of guiding, in the lower end of above-mentioned guiding parts, form a flange part that protrudes to the side.
According to said structure, because be subjected to the effect of the flange part of guiding parts and guiding parts, the fuse lead forms an orthodrome flanging, so can suppress to pay the load that is added on the fuse lead.
Preferably, high-tension fuse of the present utility model is characterized in that: above-mentioned fuse tube possesses the blown fuse sign.
According to said structure, because possess the blown fuse sign in the fuse tube, so when causing blown fuse,, just can judge that fuse really fuses according to the protrusion phenomenon of fuse tube from the main body insulator because of overcurrent.
Preferably, high-tension fuse of the present utility model, it is characterized in that: in above-mentioned bottom compartment, be fixed with the electrode installing component that above-mentioned bottom fixed electrode is installed, on this electrode installing component, releasably be provided with the guard shield that covers above-mentioned fuse tube bottom, simultaneously, by the fit structure that is located between this electrode installing component and this guard shield, this guard shield is installed on this electrode installing component.
According to said structure, the bottom of fuse tube, by covering with guard shield, length that can corresponding shortening main body insulator reduces overall weight.In addition, because, guard shield has been installed by being located at the fit structure between electrode installing component and the guard shield, can be very simple so install.
Preferably, high-tension fuse of the present utility model is characterized in that: by the fit structure that is arranged between above-mentioned electrode installing component and the above-mentioned bottom contact, above-mentioned fuse tube is installed.
According to said structure, because be by being arranged on the fit structure of electrode installing component and bottom contact, the fuse tube of installation is so can prevent dropping of fuse tube.
Preferably, high-tension fuse of the present utility model is characterized in that: above-mentioned insulator is installed in by the insulator installing component on the transverse arm of electric pole, the ejecting force that above-mentioned insulator installing component produces during along with blown fuse and being out of shape.
According to said structure, because under the strong situation of ejecting force, the distortion of insulator installing component is so can absorb ejecting force.In view of the above, can prevent the breakage of main body insulator.
Preferably, high-tension fuse of the present utility model is characterized in that: be provided with intermediate standoff between above-mentioned insulator installing component and the above-mentioned transverse arm.
According to said structure, can strengthen the distance between insulator and the grounded part, suppress the leakage of electric current, simultaneously, can increase the withstand voltage properties between insulator and the grounded part.
Preferably, high-tension fuse of the present utility model is characterized in that: the aforementioned body insulator is made a portion and cap forms respectively.
According to said structure,, become easy so make because constitute the main body insulator by tube portion and cap.
Preferably, high-tension fuse of the present utility model is characterized in that: screw thread is being fixed link on above-mentioned cap, and this link is used to connect above-mentioned top electric wire connecting portion and above-mentioned top fixed electrode.
According to said structure, fixing because upper electrode installing component and link are made with screw thread, so assembling can be very simple.
According to the utility model, in high-tension fuse,, also can open and close circuit by on-load even under electriferous state, in addition, and can be antitheft, explosion-proof, typhoon protection, anti-heavy rain, anti-pollution, anti-dust etc.
And, can hidden charging part safer, simultaneously, also safety when changing the fuse tube in electrical fuse element fusing back.
Description of drawings
Fig. 1 is the cutaway view of the first embodiment high-tension fuse.
Fig. 2 is the cutaway view of fuse tube.
Fig. 3 is the end view of expression high-tension fuse installment state.
Fig. 4 is the phantom of high-tension fuse.
Fig. 5 is the phantom of the second embodiment high-tension fuse.
Fig. 6 is the end view of the 3rd embodiment high-tension fuse.
Specific embodiment
(first embodiment)
Below, illustrate about first embodiment of the present utility model with reference to Fig. 1～Fig. 4.
As shown in Figure 1, the main body insulator 10 of high-tension fuse, make cylindric, its lower ending opening.In the inside of main body insulator 10, be formed with columned upper chambers 11 and columned bottom compartment 12, this bottom compartment 12 is communicated with the bottom of upper chambers 11, has the internal diameter bigger than upper chambers 11 simultaneously.Middle body in main body insulator 10 upper ends 13 forms porose 13a, and this hole 13a is interted by the connecting bolt 24 as link.The lower end of main body insulator 10 has mouth, is formed with lower ending opening portion 14.
Be equipped with extinguishing arc tube 38 in upper chambers 11, this extinguishing arc tube 38 is by in the medial surface that covers this upper chambers 11, and the polyacetals cylindraceous extinguishing arc materials such as (POM) that mouth has been opened at its two ends constitutes.By this extinguishing arc tube 38, the outer peripheral face of the fore-end of top fixed electrode 26 is covered.In addition, the upper end of extinguishing arc tube 38 is between top fixed electrode 26 and main body insulator 10.In the bottom of extinguishing arc tube 38, be equipped with the restriction tube 38b that when supporting extinguishing arc tube 38, carries out aftermentioned lower electrode installing component 36 location.Between the inner top surface of restriction tube 38b and bottom compartment 12, the buffer unit 39 that carries out extinguishing arc tube 38 location in clamping.
In the upper end 13 of main body insulator 10, connecting bolt 24 interts in the 13a of hole, so that its upper chambers 11 two aspects inboard and main body insulator 10 outsides towards main body insulator 10 are protruded.These connecting bolt 24 inner ends are connected on the upper electrode installation portion 25 that is fixed on main body insulator 10 with screw.On the other hand, in the outer end of connecting bolt 24, be fixed with upper terminal 23.In upper terminal 23,, be connected with the external cable of circuit by wire connector 22.The upper terminal cover 21 that upper terminal 23 is installed on main body insulator 10 upper ends 13 covers.Upper terminal 23 and wire connector 22 constitute top electric wire connecting portion.In addition, in the bottom of upper electrode installation portion 25, fixing top cylindraceous fixed electrode 26.Top fixed electrode 26 possesses around central axis, and by a plurality of contact 26a that equal angles sets at interval, each contact 26a descends both ends interlinking thereon.In the inside of this top fixed electrode 26, setting-in the ring-type limiting part 27 of keeping fixed electrode 26 internal diameters.
At main body insulator 10 lower sides, be formed with the hole 12a that bottom compartment 12 is communicated with the outside, the connecting bolt 34 as link interts in the 12a of hole, so that it is from bottom compartment 12, protrudes towards the outside of main body insulator 10.Inner end at connecting bolt 34 is provided with block 35, by this block 35 being engaged in the periphery of hole 12a, makes connecting bolt 34 mobile being restricted outwardly.And, be fixed with bottom fixed electrode 37 at the inner end of connecting bolt 34, be fixed with lower terminal 33 in the outer end of connecting bolt 34.Lower terminal 33 is connected with the external cable of circuit by electric wire link 32.Lower terminal 33 is covered by lower terminal cover 31.Constitute bottom electric wire connecting portion by lower terminal 33 and electric wire link 32.Bottom compartment 12 collection at main body insulator 10 are being adorned lower electrode installing component 36 cylindraceous, and this lower electrode installing component 36 has the inserting hole that fuse tube 40 interts.Lower electrode installing component 36 matches with the recess 12b that forms on bottom compartment 12 inner peripheral surfaces by its underpart, can prevent that it from coming off from main body insulator 10.Lower electrode installing component 36 possesses the auxiliary section 36a that protrudes towards the center.In addition, on lower electrode installing component 36, fixing bottom fixed electrode 37.On bottom contact 47, be formed with the cooperation ditch 47a of chase shape.By the fit structure that is made of auxiliary section 36a that is located at electrode installing component 36 and the cooperation ditch 47a that is located at bottom contact 47, fuse tube 40 is mounted the time, and fuse tube 40 just has been fixed.In main body insulator 10 inside, be inserted with fuse tube 40 by lower ending opening portion 14, this fuse tube 40 fuses when the electric current that overrate is arranged flows through, thereby makes the circuit outage.
As shown in Figure 2, fuse tube 40 comprises with lower member: cartridge fuse 41; Be fixed on the columned top contact fixing 54 of cartridge fuse 41 upper ends with screw thread; Be fixed on the columned top contact 42 of top contact fixing 54 upper ends with screw thread; Arc-extinguishing stick 43 by cylindrical polyacetals extinguishing arc materials such as (POM) formation that is fixed on contact 42 upper ends in top with screw thread; The guiding parts 52 that forms by the flange part 52a that is located at cartridge fuse 41 bottoms.In the inside of cartridge fuse 41, its front end is housed is fixed on switching conductor 44 between top contact fixing 54 and the top contact 42.In switching conductor 44 bottoms, flow through the electrical fuse element 45 that fuses by a kind of once the electric current that overrate is arranged, be connected with fuse lead 46.According to this structure, electrical fuse element 45, with the identical length of length of switching conductor 44, be set in the below of cartridge fuse 41.Fuse lead 46 is drawn out to the outside from the bottom of cartridge fuse 41.On the outer peripheral face 41a of cartridge fuse 41, coat the color of expression blown fuse, perhaps stick colored paster.In addition, in the lower, outer perimeter of cartridge fuse 41, be embedded with the bottom contact 47 that can slide up and down.In the bottom of bottom contact 47, be embedded with component 48 outward.Between the inner peripheral surface of cartridge fuse 41 lower, outer perimeter faces and bottom contact 47, the spring 49 as the parts of energizing is housed.In addition, in the upper side of cartridge fuse 41, be embedded with the annulus 50 bigger than the external diameter of cartridge fuse 41 outward, by this annulus 50, restriction cartridge fuse 41 exceedingly moves towards bottom contact 47 belows.That is to say, prevent that cartridge fuse 41 from dropping.On component 48, fixing fixed part 51 with screw thread, this fixed part 51 is used for fixing the fixing cord 46 of drawing from cartridge fuse 41 bottoms.The lead 46 of drawing from cartridge fuse 41 bottoms, the flange part 52a of the guiding parts 52 by being located at cartridge fuse 41 lower ends, up drawn with the mode of the pushing guiding parts 52 up back of turning back up, formed the state of compression spring 49, roll up extension and be fixed on the fixed part 51.The flange part 52a front end of guiding parts 52, make circular-arc so that load is not added on the part of turning back of lead 46.On guiding parts 52, the rubber system cover plate 53 that is used for sealed body insulator 10 lower ending opening portions 14 is housed.On the part of cover plate 53, be formed with and do not give illustrated cracking, crack,, be pulled to fixed part 51 on one side from the lead 46 that draw cartridge fuse 41 bottoms by this.
As shown in Figure 1, fuse tube 40, lower ending opening portion 14 insertions from main body insulator 10 connect extinguishing arc tube 38, from the arc-extinguishing stick 43 of extinguishing arc tube 38 upper ends protrusion, are contained in the inside of top fixed electrode 26.Be inserted under the state of main body insulator 10 at this fuse tube 40, top contact 42 can contact with the bottom of top fixed electrode 26 with switching on, and simultaneously, bottom contact 47 can contact with bottom fixed electrode 37 with switching on.That is to say, be contained at fuse tube 40 under the state of main body insulator 10 that top fixed electrode 26 and bottom fixed electrode 37 are being electrically connected by fuse tube 40.
As shown in Figure 3, the main body insulator 10 of high pressure safety fuse by intermediate standoff 79, relies on and as the insulator of insulator installing component metal parts 78 and installation bracket 75,76 to be installed and to be mounted in the line the electric pole transverse arm 80. Installation bracket 75,76 is made circular-arc, and is overlapping with the central portion outer peripheral face of main body insulator 10, and the clamping part 77 by being made up of screw and nut is fixedly clamped on main body insulator 10.
Below, the action of the high-tension fuse that constitutes as previously mentioned is described.
On the circuit that connects high-tension fuse, in case there is the electric current that resembles overrates such as lightning impulse to flow through, electrical fuse element 45 is just fused, and is subjected to the effect of spring 49 elastic force, as shown in Figure 3, because cartridge fuse 41 moves to the below, so top contact 42 is from the bottom disengagement of top fixed electrode 26, promptly, because after electrical fuse element 45 fusing, top contact 42 is thrown off from top fixed electrode 26, so the electrical connection by fuse tube 40 is disconnected.In addition this moment, fuse tube 40 protrudes from main body insulator 10 lower ending opening portions 14.Therefore, just can judge clearly that by vision electrical fuse element 45 has fused.In addition, because the fusing sign is arranged,, make clearer and more definite judgement so vision can further be passed through at the outer peripheral face 41a of cartridge fuse 41.Produce ejecting force up during electrical fuse element 45 fusing, under the big situation of this ejecting force, the distortion by installation bracket 75,76 and installation metalwork 78 can absorb ejecting force, prevents the breakage of main body insulator 10.
Constructing etc. when wanting on-load to open and close circuit, under the charged state of top fixed electrode 26, fuse tube 40 is extracted from main body insulator 10.So, when top contact 42 and bottom contact 47 from top fixed electrode 26 and when bottom fixed electrode 37 is thrown off, between top contact 42 and top fixed electrode 26, can produce electric arc.In the slit of electric arc between the arc-extinguishing stick 43 of extinguishing arc tube 38 internal face 38a and fuse tube 40, be subjected to the arc heat effect, the outer peripheral face of arc-extinguishing stick 43 melts, and produces arc gas, is subjected to this arc gas effect, and electric arc is eliminated.
The foregoing description has following action effect.
(1) under top fixed electrode 26 electriferous state, when if fuse tube 40 is extracted from main body insulator 10, between top contact 42 and top fixed electrode 26, can produce electric arc, in the slit of electric arc between the arc-extinguishing stick 43 of the internal face 38a of extinguishing arc tube 38 and fuse tube 40, because by the arc gas that causes by arc heat, produce from arc-extinguishing stick 43, can carry out the slit extinguishing arc, so open and close even under electriferous state, also can carry out the on-load of circuit.
(2) upper part of extinguishing arc tube 38 is between top fixed electrode 26 and main body insulator 10.That is to say that the bottom by top fixed electrode 26 is surrounded by the upper part of extinguishing arc tube 38, the skew of top fixed electrode 26 positions is just suppressed.Therefore, when fuse tube 40 being inserted top fixed electrode 26, arc-extinguishing stick 43 is difficult to front end with top fixed electrode 26 and bumps and connect, so can prevent the damage of top fixed electrode 26.In addition, arc-extinguishing stick 43 is easy to insert not by 26 scrapings of top fixed electrode.And, can prevent top fixed electrode 26 contact main body insulators 10 and the damage that causes.
(3) because in the inside of top fixed electrode 26, possess limiting part 27, so towards top fixed electrode 26 inner counter to distortion, be restricted the restriction of parts 27.Therefore, fixed electrode 26 internal diameters in top can be remained on the size of regulation.In addition, when inserting fuse tube 40, because the guiding of arc-extinguishing stick 43 restricted parts 27 inner faces, so arc-extinguishing stick 43 can easily insert not by 26 scrapings of top fixed electrode.
(4) because above-mentioned top contact 42 is connected with electrical fuse element 45 by switching conductor 44, so can increase the interval between top contact 42 and the electrical fuse element 45, can set the position of electrical fuse element 45 with the length of switching conductor 44 at the downside of cartridge fuse 41.Its result, can allow since the interior pressure that produced during blown fuse that overcurrent causes discharge toward the below, and can prevent the damage of cartridge fuse 41.
(5) because of the lower ending opening portion 14 that has covered main body insulator 10 by cover plate 53,, can prevent the stained of main body insulator 10 inside so does not expose the inside of main body insulator 10.
(6) because pass through the flange part 52a of guiding parts 52 and guiding parts 52, fuse lead 46 is turned back along big circular arc, so can suppress to pay the load that is added on the fuse lead 46.
(7) because on fuse tube 40, possess the blown fuse sign, so by when causing blown fuse because of overcurrent, fuse tube 40 can be held the fact that fuse has fused more clearly from the protrusion of main body insulator 10.
(8) because, fuse tube 40 has been installed, so can prevent dropping of fuse tube 40 by auxiliary section 36a that is arranged on lower electrode installing component 36 and the engagement formation that is arranged on the cooperation ditch 47a of bottom contact 47.
(9) the molten ejecting force that produces when disconnected up of electrical fuse element 45 under the big situation of this ejecting force, by installation bracket 75,76 and distortion that metalwork 78 is installed, can absorb ejecting force, prevents the breakage of main body insulator 10.
(10) because main body insulator 10 has been installed by intermediate standoff 79, so can be with main body insulator 10 with as the distance lengthening between the transverse arm 80 of grounded part, thereby suppress the leakage of electric current, simultaneously, increase the withstand voltage properties of main body insulator 10 and transverse arm 80.
(11) because upper electrode installation portion 25 and connecting bolt 24 usefulness screw threads are fixed, so can assemble simply.
(12), can prevent that upper terminal 23 and lower terminal 33 are stolen by upper terminal guard shield 21 and lower terminal guard shield 31 are set.In addition, can upper terminal 23 and lower terminal 33 as charging part is hidden.
(13) because fuse tube 40 has been contained in main body insulator 10 inside, so can prevent the robbed or burgled and typhoon, storm, pollution, dust etc. of fuse tube 40.
(14) because be provided with top fixed electrode 26 and bottom fixed electrode 37 in the inside of main body insulator 10, thus can top fixed electrode 26 and bottom fixed electrode 37 as charging part is hidden, thus safety.
(15) electrical fuse element 45 is molten disconnected, and by the elastic force of spring 49, cartridge fuse 41 moves to the below, and top contact 42 is separated from top fixed electrode 26.That is, because after electrical fuse element 45 fusing, the electrical connection by fuse tube 40 is disconnected, so the safety can guarantee to change fuse tube 40 time.
(second embodiment)
Below, with reference to Fig. 5 second embodiment of the present utility model is described.The high-tension fuse of this embodiment, following variant with above-mentioned first embodiment on some: main body insulator 10 is made of cylindrical portion 10a and cap 10b; The end portion of main body insulator 10 shortens, and is provided with resinous guard shield 60 in this part; Extinguishing arc tube 38 and restriction tube 38b have made one.Below, be that the center describes with difference with first embodiment.In addition, the high-tension fuse of this embodiment, the high-tension fuse of following first embodiment as shown in Figure 1, structure is much at one.
As shown in Figure 5, the upper end of the cylindrical portion 10a of main body insulator 10 has an opening.And, facing to this upper end open portion,, cover upper end open portion by with the cement adhesive cover 10b of portion.At the middle body of cap 10b, formation interts as the hole 13a of the connecting bolt 24 of link.In the lower central portion of cap 10b, be formed with upper electrode fixed part 10c.On the upper electrode fixed part 10c of cap 10b, fixing upper electrode installation portion 25 with screw thread.In the 13a of the hole of cap 10b, interting connecting bolt 24, and it is protruded towards the inboard of the upper chambers 11 of cylindrical portion 10a and two aspects such as the outside of cylindrical portion 10a.In the outer end of this connecting bolt 24, be fixed with upper terminal 23, at the inner end of connecting bolt 24, fixing upper electrode installation portion 25 with screw thread.
In the lower ending opening portion 14 of main body insulator 10 cylindrical portion 10a, on lower electrode installing component 36, the cylindric guard shield 60 that covers fuse tube 40 bottoms is installed releasably.Specifically, guard shield 60 interts the state of above-mentioned guard shield 60 with the bottom of fuse tube 40, is installed with respect to lower electrode installing component 36.By by being arranged on the hole 36b in the lower electrode installing component 36 and being arranged on the fit structure that the claw 60a of guard shield 60 constitutes, guard shield 60 is installed on the lower electrode installing component 36.At the outer peripheral face of guard shield 60, be formed with a plurality of slits.
In the bottom of extinguishing arc tube 38, form restricted tube 38b with this bottom with becoming one.This restriction tube 38b is positioned at bottom compartment 12 the insides, the state of buffer unit 39 with clamping between the inner top surface of the upper end of restriction tube 38b and bottom compartment 12, by lower electrode installation portion 36 positioning and fixing.
According to second embodiment, except that the action effect of first embodiment, can also obtain following action effect.
(1) because be to constitute main body insulator 10, becomes easy so make with cylindrical portion 10a and cap 10b.
(2) by covering the bottom of fuse tubes 40 with guard shield 60, it is so long that the length of main body insulator 10 just can corresponding minimizing, thereby whole weight just can reduce.In addition, because be, can carry out simply so install by by being located at the hole 36b on the lower electrode installing component 36 and being located at the fit structure that the claw 60a on the guard shield 60 constituted guard shield 60 is installed.
(3) a plurality of slits have been formed because of outer peripheral face, so the gas that produces in electrical fuse element 45 fusing is from the sidepiece loss, so can prevent the damage of guard shield 60 at guard shield 60.
(4) because in the bottom of extinguishing arc tube 38, restriction tube 38b is protruded forms as one, extinguishing arc tube 38 is fixed on the lower electrode installing component 36, so, extinguishing arc tube 38 can positioning and fixing 11 li of the upper chambers of main body insulator 10.
(the 3rd embodiment)
Secondly, with reference to Fig. 6 the 3rd embodiment of the present utility model is described.In the high-tension fuse of this embodiment, with upper electrode connecting portion and lower electrode connecting portion, it is variant to be altered to mould awl 71,72 this point and above-mentioned second embodiment.Below, be that the center describes just with difference with second embodiment.
As shown in Figure 6, at top electric wire connecting portion and bottom electric wire connecting portion, replace wire connector 22,32, upper terminal 23, lower terminal 33 and terminal cover 21,31, be threaded parts 71a, the 72a that are threaded with connecting bolt 24,34 in the front end setting of electric wire 73,74, and having used mould awl (moldcone) 71,72, this mould awl 71,72 is used for will being connected screw link 71a, 72a and sealing with electric wire 73,74 on screw link 71a, the 72a by rubber.Mould awl 71,72 is threaded with connecting bolt 24,34 employings, is fixed on the insulator 10.In addition, the electric wire 73,74 of mould awl 71,72 is connected with the external cable that does not give illustrated circuit respectively.
The 3rd embodiment except the action effect of second embodiment, can also obtain following action effect.
(1) because connect electric wire 73,74, decreases performance so can improve resistant with mould awl 71,72.
In addition, the foregoing description can also be by its following mode that suitably changes is implemented.
In the above-described configuration, main body insulator 10 is not limited to use ceramic products, also can adopt resin.
In the above-described configuration, though be that a rubber system cover plate 53 that covers the lower ending opening portion 14 of main body insulator 10 is installed on the guiding parts 52,, also can be installed in the upper end of the component 48 of bottom contact 47.Even because like this, the inside of main body insulator 10 can not exposed yet, so can prevent the stained of main body insulator 10 inside.
In the bottom of bottom contact 47,, also can be made of one formula though component 48 is other formation of form of embedding in addition.
In the 3rd embodiment, mould awl the 71, the 72nd is threaded with connecting bolt 24,34, is fixed on the insulator 10, still, also can adopt the face of connecing that bumps of bonding mould awl 71,72 of binding agent and insulator 10.Do like this, can sealed mould awl 71,72 and insulator 10 bump the face of connecing, can improve the bending strength of mould awl 71,72 simultaneously again.
Claims (14)
1. high-tension fuse is characterized in that:
The top of giving in the main body insulation is provided with top electric wire connecting portion, simultaneously, is provided with bottom electric wire connecting portion in the bottom of aforementioned body insulator;
Inside at this main body insulator, the bottom compartment that is formed with upper chambers and ins succession with the bottom of above-mentioned upper chambers, upper end in above-mentioned upper chambers, be provided with the top fixed electrode that is connected with above-mentioned top electric wire connecting portion, simultaneously, downside in above-mentioned upper chambers is provided with the extinguishing arc tube, is provided with the bottom fixed electrode that is connected with above-mentioned bottom electric wire connecting portion in above-mentioned bottom compartment;
Inside at the aforementioned body insulator, the fuse tube that connects above-mentioned top fixed electrode and above-mentioned bottom fixed electrode is housed, and make it connect above-mentioned extinguishing arc tube, upper end at above-mentioned fuse tube, be provided with and the co-operating of above-mentioned extinguishing arc tube, carry out the arc-extinguishing stick of extinguishing arc, bottom at above-mentioned arc-extinguishing stick, be provided with the top contact that contacts with above-mentioned top fixed electrode, bottom at above-mentioned top contact is provided with cartridge fuse, electrical fuse element and fuse lead are equipped with the state that is connected in series, in the bottom of above-mentioned cartridge fuse in the inside of cartridge fuse, be provided with the bottom contact that contacts with above-mentioned bottom fixed electrode, in above-mentioned fuse tube, be provided with towards the outside of above-mentioned main body insulator the parts of energizing that above-mentioned cartridge fuse is energized;
When above-mentioned electrical fuse element is fused, be subjected to the above-mentioned parts effect of energizing, above-mentioned cartridge fuse moves, and makes the top contact throw off from the top fixed electrode.
2. high-tension fuse according to claim 1, it is characterized in that: be formed with between above-mentioned arc-extinguishing stick and the above-mentioned extinguishing arc tube and be used under the charged state of above-mentioned top fixed electrode, when above-mentioned fuse tube is thrown off from above-mentioned top fixed electrode, with the slit of the electric arc extinguishing arc that produces between above-mentioned top contact and the above-mentioned top fixed electrode.
3. high-tension fuse according to claim 2 is characterized in that: the upper part of above-mentioned extinguishing arc tube, and between above-mentioned top fixed electrode and aforementioned body insulator.
4. high-tension fuse according to claim 3 is characterized in that: above-mentioned top fixed electrode is a tubular, possesses the ring-type limiting part that can keep above-mentioned top fixed electrode internal diameter.
5. high-tension fuse according to claim 4 is characterized in that: above-mentioned top contact and above-mentioned electrical fuse element connect by the switching conductor.
6. high-tension fuse according to claim 5 is characterized in that: the cover plate that possesses sealing aforementioned body insulator peristome.
7. high-tension fuse according to claim 6 is characterized in that: in the lower end of above-mentioned fuse tube, possess the guiding parts of the above-mentioned fuse lead of guiding, in the lower end of this guiding parts, be formed with the flange part that protrudes towards a side.
8. high-tension fuse according to claim 7 is characterized in that: above-mentioned fuse tube possesses the blown fuse sign.
9. high-tension fuse according to claim 8, it is characterized in that: in above-mentioned bottom compartment, be fixed with the electrode installing component that above-mentioned bottom fixed electrode is installed, on this electrode installing component, releasably be provided with the guard shield that covers above-mentioned fuse tube bottom, simultaneously, by the fit structure that is located between this electrode installing component and this guard shield, this guard shield is installed on this electrode installing component.
10. high-tension fuse according to claim 9 is characterized in that: by the fit structure of being located between above-mentioned electrode installing component and the above-mentioned bottom contact, above-mentioned fuse tube is installed.
11. high-tension fuse according to claim 10, it is characterized in that: the aforementioned body insulator is installed in the insulator installing component on the transverse arm of electric pole, produces distortion when the ejecting force that above-mentioned insulator installing component produces when blown fuse is big.
12. high-tension fuse according to claim 11 is characterized in that: be provided with intermediate standoff between above-mentioned insulator installing component and the above-mentioned transverse arm.
13. according to any one described high-tension fuse in the claim 1～12, it is characterized in that: the aforementioned body insulator is made a portion and cap forms respectively.
14. high-tension fuse according to claim 13 is characterized in that: screw thread is being fixed link on above-mentioned cap, and this link is used to connect above-mentioned top electric wire connecting portion and above-mentioned top fixed electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201465622U CN201112314Y (en) | 2007-05-09 | 2007-05-09 | High voltage fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201465622U CN201112314Y (en) | 2007-05-09 | 2007-05-09 | High voltage fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201112314Y true CN201112314Y (en) | 2008-09-10 |
Family
ID=39964060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201465622U Expired - Fee Related CN201112314Y (en) | 2007-05-09 | 2007-05-09 | High voltage fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201112314Y (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102243958A (en) * | 2011-05-16 | 2011-11-16 | 曲秀均 | Fully-insulated drop-out type fuse having built-in fusion tube |
| CN103545154A (en) * | 2013-11-04 | 2014-01-29 | 国家电网公司 | Fuse protector |
| CN103928273A (en) * | 2014-05-04 | 2014-07-16 | 马云涌 | Insulation closed type intelligent fuse |
| CN104103468A (en) * | 2014-07-03 | 2014-10-15 | 江苏省电力公司洪泽县供电公司 | Line connector provided with spring arc extinguishing device |
| CN105390353A (en) * | 2015-11-14 | 2016-03-09 | 彭伟成 | Current passing protection fuse |
| CN106128901A (en) * | 2016-08-24 | 2016-11-16 | 辽宁华隆电力科技股份有限公司 | A kind of two-part insulating ceramic and upper locking injection fuse box |
| CN106449331A (en) * | 2016-08-31 | 2017-02-22 | 合保电气（芜湖）有限公司 | Full-insulation closed-type load fuse |
| CN106504962A (en) * | 2016-11-07 | 2017-03-15 | 北京索弗电气科技有限公司 | A kind of fuse |
| CN106601567A (en) * | 2016-12-15 | 2017-04-26 | 浙江鲁高电力科技有限公司 | Outdoor all-insulation enclosed-type injection fuse |
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- 2007-05-09 CN CNU2007201465622U patent/CN201112314Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243958A (en) * | 2011-05-16 | 2011-11-16 | 曲秀均 | Fully-insulated drop-out type fuse having built-in fusion tube |
| CN103545154A (en) * | 2013-11-04 | 2014-01-29 | 国家电网公司 | Fuse protector |
| CN103545154B (en) * | 2013-11-04 | 2015-10-21 | 国家电网公司 | Fuse |
| CN103928273A (en) * | 2014-05-04 | 2014-07-16 | 马云涌 | Insulation closed type intelligent fuse |
| CN104103468A (en) * | 2014-07-03 | 2014-10-15 | 江苏省电力公司洪泽县供电公司 | Line connector provided with spring arc extinguishing device |
| CN107134396A (en) * | 2015-11-14 | 2017-09-05 | 彭伟成 | A kind of fixed mount of overcurrent protection fuse |
| CN105390353A (en) * | 2015-11-14 | 2016-03-09 | 彭伟成 | Current passing protection fuse |
| CN107275167A (en) * | 2015-11-14 | 2017-10-20 | 彭伟成 | A kind of overcurrent protection fuse |
| CN107275166A (en) * | 2015-11-14 | 2017-10-20 | 彭伟成 | A kind of overcurrent protection fuse |
| CN106128901A (en) * | 2016-08-24 | 2016-11-16 | 辽宁华隆电力科技股份有限公司 | A kind of two-part insulating ceramic and upper locking injection fuse box |
| CN106449331A (en) * | 2016-08-31 | 2017-02-22 | 合保电气（芜湖）有限公司 | Full-insulation closed-type load fuse |
| CN106504962A (en) * | 2016-11-07 | 2017-03-15 | 北京索弗电气科技有限公司 | A kind of fuse |
| CN106601567A (en) * | 2016-12-15 | 2017-04-26 | 浙江鲁高电力科技有限公司 | Outdoor all-insulation enclosed-type injection fuse |
| CN106601567B (en) * | 2016-12-15 | 2018-07-27 | 浙江鲁高电力科技有限公司 | A kind of open air all insulation enclosed type expulsion fuse |
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