CN201540864U - High-voltage fuse - Google Patents
High-voltage fuse Download PDFInfo
- Publication number
- CN201540864U CN201540864U CN2009201611721U CN200920161172U CN201540864U CN 201540864 U CN201540864 U CN 201540864U CN 2009201611721 U CN2009201611721 U CN 2009201611721U CN 200920161172 U CN200920161172 U CN 200920161172U CN 201540864 U CN201540864 U CN 201540864U
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- Prior art keywords
- main body
- body insulator
- fuse
- wall thickness
- upper chambers
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a high-voltage fuse. A cylindrical upper chamber (11) and a cylindrical lower chamber (12) connected at the lower part of the upper chamber are formed in a main body insulator (10); fuse cylinders (40) are contained in the upper chamber and the lower chamber; the wall thickness (L4) of the lower chamber of the main body insulator is designed to be larger than the wall thickness (L1) (L2) and (L3) of the upper chamber (11) of the main body insulator (10); in the upper chamber of the main body insulator, the wall thickness (L1) of the corresponding part of an assembling groove (19) for assembling a mounting clamp (20) for the main body insulator is the largest. Accordingly, the high-voltage fuse can improve the mechanical strength of impact caused by the expansion pressure when a fuse unit (45) is fused due to large current, without damaging the main body insulator (10); in addition, the wall thicknesses are set to be different, the lower chamber (12) with large impact is thickened and the upper chamber (11) is thinned so as to realize light weight.
Description
Technical field
The utility model relates to a kind of high-tension fuse with main body insulator.
Background technology
In the past, known promising protection power distribution transformer was provided with, was taking in the high-tension fuse (for example, referring to utility model 02285265.4) of fuse tube in porcelain system main body insulator.In this fuse tube, accommodating electrical fuse element.This electrical fuse element is connected the part midway of fuse lead-in wire, and this fuse lead-in wire is connected on the top fixed electrode of being located in the main body insulator and bottom fixed electrode.An electric current that overrate arranged on distribution line, electrical fuse element is fusing at once just, and distribution line is disconnected thus.The wall thickness of each one of this main body insulator is identical.
Yet when fusing owing to big electric current in the fuse unit, because the bulbs of pressure that moment takes place in the main body insulator, breakage can appear in the main body insulator bottom of bearing the bulbs of pressure most.
And in the fusing of fuse unit, gas is once emitted by the lower ending opening portion from the fuse tube.Then, the main body insulator counter-force of being emitted by this gas is pushed the top to.At this moment, because the body insulator is fixed on the transverse arm etc. by sectional fixture, the bending stress that produces so follow the main body insulator to knock the sectional fixture installation portion upward is applied in, and breakage can appear in the installation portion of sectional fixture.
The utility model content
The utility model proposes at above-mentioned situation just, and it is a kind of that its purpose is to provide, and the main body insulator can damaged high-tension fuse when the fuse unit is owing to big current fusing.
The utility model is a kind of high-tension fuse, its structure is as follows: be formed with upper chambers cylindraceous in the main body insulator, also be formed with the bottom compartment cylindraceous that is connected in described upper chambers bottom, in described upper chambers and described bottom compartment, contain the fuse tube.It is characterized in that: the wall thickness of the bottom compartment of described main body insulator forms thicker than the wall thickness of the upper chambers of described main body insulator.
Based on the utility model, the main body insulator can be damaged when the fuse unit is owing to big current fusing.
Description of drawings
Fig. 1 is the profile of high-tension fuse.
Fig. 2 is the profile of main body insulator.
Symbol description
The 1-high-tension fuse, 10-main body insulator, 11-upper chambers, the 12-bottom compartment, 12a-hole, 12b-slot, the 13-upper end, 13a-hole, 14-lower openings portion, the 14a-inwall, 15-lower sides, 16-fine protrusions, 17-adhesive, the 18-pleat that insulate, the 18a-inclined plane, the 19-fitting recess, 20-sectional fixture, 21-upper mould awl, the 21a-internal thread part, 22-top installing component, 23-top fixed electrode, 24-upper electrode sheet, 29-nut, 31-lower die awl, the 31a-internal thread part, 32-joint lines, 33-bottom installing component, the 33a-holding section, 34-bottom fixed electrode, 35-arc extinguishing tube, the 36-fixed electrode, 37-lower electrode sheet, 38-electrode supporting plate, the 39-buffer unit, 40-fuse tube, 41-top contact, the 42-insulating cylinder, 42a-minor diameter part, 42b-large-diameter portion, the 42c-restrictions, 43-arc extinguishing rod, 44-fuse, the 44a-portion of terminal, 45-electrical fuse element, 46-fuse lead-in wire, the 46a-splicing ear, 47-bottom contact, 48-display barrel, the 49-spring, 50-trip bolt, 51-fastening part, 54-engages protuberance, the 56-stationary fixture, 57-flat spring, 58-lower cover, the 58d-peristome, the airtight bolt of 59-.
Embodiment
As shown in Figure 1, the porcelain system main body insulator 10 of high-tension fuse 1 forms cylindric, is formed with a plurality of insulation pleats 18 on its outer peripheral face.Be formed with the inclined plane 18a of inclination downwards on the top of insulation pleat 18.The lower ending opening of main body insulator 10 forms lower ending opening portion 14.In the inside of main body insulator 10, be formed with columned upper chambers 11 and columned bottom compartment 12, bottom compartment 12 is communicated with the bottom of upper chambers 11, and its internal diameter enlarges greatlyyer than upper chambers 11.Central portion in the upper end 13 of main body insulator 10 is formed with the hole 13a that inserts logical top fixed electrode 23.Main body insulator 10 is kept by sectional fixture 20.
As shown in Figure 2, on the outer peripheral face of the upper chambers 11 of main body insulator 10, be formed with the fitting recess 19 of assembling sectional fixture 20.Thus, sectional fixture 20 is fixed in the fitting recess 19, can not misplace with respect to main body insulator 10.Above fitting recess 19, be formed with the insulation pleat 18 of 3 main body insulators 10, below fitting recess 19, be formed with 2 insulation pleats 18.In the upper chambers 11 of main body insulator 10, the wall thickness L1 of fitting recess 19 counterparts is the thickest.The wall thickness L2 of fitting recess 19 belows is thinner than the wall thickness L1 of fitting recess 19 counterparts.The wall thickness L3 of fitting recess 19 tops is thinner than the wall thickness L2 of fitting recess 19 belows.Further, the wall thickness L4 of bottom compartment 12 is than the wall thickness L1 of upper chambers 11, L2, and L3 is thick.
The inwall 11a of the upper chambers 11 of main body insulator 10 forms, the taper that enlarges more of diameter more downwards.That is to say, the inside diameter D 2 of fitting recess 19 counterparts of upper chambers 11 is bigger than the inside diameter D 1 of the fitting recess 19 counterparts top of upper chambers 11, and the inside diameter D 3 of the fitting recess 19 counterparts below of upper chambers 11 is bigger than the inside diameter D 2 of fitting recess 19 counterparts of upper chambers 11.
As shown in Figure 1, in the upper end 13 of main body insulator 10, top installing component 22 is inserted with the form of giving prominence to the outside of main body insulator 10 in the upper chambers 11 of main body insulator 10 and is led among the 13a of hole, and is fixed on the main body insulator 10 by nut 29.
The top fixed electrode 23 that is being spirally connected on top installing component 22, top fixed electrode 23 is fixed on the main body insulator 10 by this top installing component 22.In the outer end of top fixed electrode 23, the internal thread part 21a of the cone shape upper mould awl 21 that is being spirally connected.Upper mould awl 21 is bonded on the upper end 13 of main body insulator 10 by adhesive.13 are formed with the stage portion 13b that upper mould awl 21 is installed in the upper end.On the lead-out wire of upper mould awl 21, be connected with the external cable of distribution line.
Be formed with the hole 12a that runs through bottom compartment 12 walls on the lower sides 15 of main body insulator 10, the threaded portion 31a of coniform lower die awl 31 leads among the 12a of hole to insert to the outstanding form of bottom compartment 12 inner faces from main body insulator 10.Stationary fixture 36 is being spirally connected on the threaded portion 31a of lower die awl 31.
Contain bottom fixed electrode 34 and form roughly discoideus buffer unit 39 in the bottom compartment 12 of main body insulator 10, this bottom fixed electrode 34 is connected on the threaded portion 31a of lower die awl 31 by connecting line 32.Bottom fixed electrode 34 is made of the electrode support plate 38 of bottom cylindraceous installing component 33 and a pair of lower electrode sheet 37 and ring-type, and bottom installing component 33 has the inserting hole of inserting logical fuse tube 40 usefulness.Be provided with holding section 33a in the bottom of bottom installing component 33, this holding section 33a is fastened among the slot 12b of the inner peripheral surface that is formed at bottom compartment 12, comes off from main body insulator 10 to prevent bottom installing component 33.Buffer unit 39 is fixed by the upside of bottom fixed electrode 34 and the upper surface of bottom compartment 12.Butt has arc extinguishing tube 35 on the top of buffer unit 39.
In the lower ending opening portion 14 of bottom compartment 12, be fastened with the lower cover 58 of closed lower peristome 14 by adhesive.On lower cover 58, airtight bolt 59 is installed, the peristome 58d of these airtight bolt 59 airtight lower cover 58 to load and unload possible form.Airtight bolt 59 is kept by flat spring 57.Cover on 58 the 14 inwall 14a of lower ending opening portion facing toward, be formed with fine protrusions 16.
In the inside of main body insulator 10, contain the fuse tube 40 that connects top fixed electrode 23 and bottom fixed electrode 34 with the form that runs through arc extinguishing tube 35.
In the upper end of fuse tube 40, be provided with the cylindric top contact 41 of interlocking on top fixed electrode 23.Top contact 41 can contact with the upper electrode sheet 24 of the shape of falling U.On top fixed electrode 23, be equipped with the arc extinguishing rod of making by arc quenching materials such as polyacetals 43, this arc extinguishing rod 43 is between upper electrode sheet 24.
Be provided with columned insulating cylinder 42 in the bottom of top contact 41.Between the bottom of the upper end of insulating cylinder 42 and top contact 41, fixedly mounting stationary fixture 56.In the inside of insulating cylinder 42, be provided with the go between insurance 44 of 46 series connection assemblings of electrical fuse element 45 and fuse.Front end in insurance 44 is provided with and forms discoideus portion of terminal 44a.After fuse 44 was inserted into the inside of stationary fixture 56, top contact 41 was screwed onto the top of stationary fixture 56, the portion of terminal 44a of fuse 44 be fixed anchor clamps 56 and 41 clampings of top contact, and formation is electrically connected.Thus, the top contact 41 of fuse tube 40 and bottom contact 47 are via the portion of terminal 44a of fuse 44, electrical fuse element 45, fuse lead-in wire 46, form and be electrically connected.Electrical fuse element 45 fuses when one has the electric current of overrate to flow through at once.End at fuse lead-in wire 46 is being provided with the binding terminal 46a with breach recess.
On insulating cylinder 42, the cylindric bottom contact of rabbeting with bottom fixed electrode 34 47 along the form trip embedding that axis direction moves.
Be bolted with display barrel 48 in the bottom of insulating cylinder 42.Between bottom contact 47 and display barrel 48, a spring 49 as the parts of energizing is arranged, this spring 49 pushes away insulating cylinder 42 to the outside of main body insulator 10 bullet all the time.Fuse lead-in wire 46 turns back upward from the lower end of display barrel 48, simultaneously splicing ear 46a is hung at compression spring 49 under the state on the trip bolt 50 of bottom contact 47, by trip bolt 50 clamped being fixed on the fastening part 51.That is to say that under this state, fuse lead-in wire 46 remains in the tensioning state.On the periphery of the lower end of bottom contact 47, be formed with a pair of engaging recessed part 54.
In insulating cylinder 42, be formed with minor diameter part 42a and the diameter large-diameter portion 42b bigger that bottom contact 47 is supported with form moving up and down than minor diameter part 42a.Stage portion between minor diameter part 42a and the large-diameter portion 42b has constituted restrictions 42c, and this restrictions 42c restriction insulating cylinder 42 moves downwards with respect to bottom contact 47.
Insert under the state of main body insulator 10 at fuse tube 40, top contact 41 contacts with top fixed electrode 23 with the form that can switch on, and meanwhile, bottom contact 47 contacts with bottom fixed electrode 34 with the form that can switch on.That is to say that under fuse tube 40 was housed in state in the main body insulator 10, top fixed electrode 23 and bottom fixed electrode 34 formed by fuse tube 40 and be electrically connected.
Below, the action of the high-tension fuse 1 of formation is in the above described manner described.
One has super-high-current to flow through in the high-tension fuse 1, the just fusing at once of the electrical fuse element 45 of fuse 44.At this moment since moment the bulbs of pressure that take place, airtight bolt 59 breaks away from from lower cover.And the tensioning state of fuse lead-in wire 46 is disengaged, and fuse tube 40 is based on the elastic force of spring 49, is forced to move to the position of engaging on the restrictions 42c of fuse tube 40 and the bottom contact 47 downwards.When top contact 41 broke away from from top fixed electrode 23, display barrel 48 exposed from the lower end of main body insulator 10.Thus, the information that fused of the electrical fuse element 45 of high-tension fuse 1 is apprised of to the outside.The operating personnel can expose the information that has super-high-current to flow through by visual confirmation to the display barrel 48 of outside from main body insulator 10.At this moment, sectional fixture 20 does not have breakage.
Based on the execution mode of above explanation, can obtain following effect.
(1) main body insulator 10 is formed, the wall thickness L4 of bottom compartment 12 is than the wall thickness L1 of upper chambers 11, L2, and L3 is big.Thus, the mechanical strength of the impact that is produced by the bulbs of pressure in the time of can improving for fuse unit 45 because of big current fusing is so the bottom compartment 12 of main body insulator 10 can be damaged.
And, will all not form same thickness, be made as the thicklyest but will impact maximum bottom compartment 12, with upper chambers 11 attenuates, can realize lightweight thus.
(2) with the wall thickness L1 of the upper chambers 11 of main body insulator 10, L2, L3 sets with the order of wall thickness L3＜wall thickness L2＜wall thickness L1.That is to say that the wall thickness L1 that is equipped with fitting recess 19 counterparts of sectional fixture 20 is set as the thickest.Thus, fuse unit 45 bears the mechanical strength of emitting the last thrust that produces because of expanding gas downwards owing to can improve in because of big current fusing, and fitting recess 19 counterparts of main body insulator 10 can be not damaged.So upper chambers 11 can be not damaged.
And, will be in the wall thickness L2 thickening of the upper chambers 11 between bottom compartment 12 and the fitting recess 19.Thus, can improve mechanical strength between bottom compartment 12 and the fitting recess 19.
Further, be not set at upper chambers 12 all wall thickness equally thick, and that fitting recess 19 counterparts that will go up the thrust maximum are made as is the thickest, and ratio fitting recess 19 counterparts of the thickness setting between bottom compartment 12 and the fitting recess 19 are thin, so can be with upper chambers 11 lightweights.
(3) upper chambers 11 of main body insulator 10 is formed the taper that diameter more downwards enlarges more.Thus, expanding gas that can (load disconnects) produces when extracting the fuse tube 40 that is under the "on" position is emitted downwards.
(4) on the surface of main body insulator 10, formed the fitting recess 19 of assembling sectional fixture 20.Thus, sectional fixture 20 can be assemblied on the main body insulator 10 with not misplacing.
(5) on the upper end 13 of the main body insulator 10 that upper mould awl 21 is installed, be formed with stage portion 13b, on the lower sides 15 of the main body insulator 10 that lower die awl 31 is installed, be formed with stage portion 15a.Thus, upper mould awl 21 can closely be fixed on the upper end 13 of main body insulator 10, and lower die awl 31 can closely be fixed on the lower sides 15 of main body insulator 10.So, the immersion of water can not appear, and upper mould awl 21 and lower die awl 31 are firmly fixed.
(6) top of fitting recess 19 has formed 3 insulation pleats 18, and the below of fitting recess 19 has formed 2 insulation pleats 18.Thus, can will bore 21 and lower die awl 31 lofts that are connected respectively, and the insulation creepage distance between the sectional fixture 19 extends with upper mould.
(7) be formed with the inclined plane 18a of inclination downwards on the top of insulation pleat 18.Thus, even because the water that rain to wait generation attached to also flowing downward on the pleat 18 that insulate, can improve drainage.
And above-mentioned execution mode also can carry out suitable change and implements with once form.
In the above-described configuration, as long as can guarantee the creepage distance that insulate, can change the number of the insulation pleat 18 of main body insulator 10 arbitrarily.
Claims (3)
1. high-tension fuse, its structure is as follows: be formed with upper chambers cylindraceous in the main body insulator, also be formed with the bottom compartment cylindraceous that is connected in described upper chambers bottom, contain the fuse tube in described upper chambers and described bottom compartment; It is characterized in that:
The wall thickness of the bottom compartment of described main body insulator forms thicker than the wall thickness of the upper chambers of described main body insulator.
2. high-tension fuse according to claim 1 is characterized in that:
In the upper chambers of described main body insulator, the wall thickness of the part of the sectional fixture that the described main body insulator of assembling maintenance is used forms the thickest.
3. high-tension fuse according to claim 2 is characterized in that:
The upper chambers of described main body insulator forms the taper that diameter more downwards enlarges more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201611721U CN201540864U (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201611721U CN201540864U (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540864U true CN201540864U (en) | 2010-08-04 |
Family
ID=42592318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201611721U Expired - Fee Related CN201540864U (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540864U (en) |
-
2009
- 2009-06-30 CN CN2009201611721U patent/CN201540864U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20150630 |
|
| EXPY | Termination of patent right or utility model |