CN201435366Y - High-voltage fuse - Google Patents
High-voltage fuse Download PDFInfo
- Publication number
- CN201435366Y CN201435366Y CN2009201611736U CN200920161173U CN201435366Y CN 201435366 Y CN201435366 Y CN 201435366Y CN 2009201611736 U CN2009201611736 U CN 2009201611736U CN 200920161173 U CN200920161173 U CN 200920161173U CN 201435366 Y CN201435366 Y CN 201435366Y
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- China
- Prior art keywords
- main body
- lower cover
- body insulator
- fuse
- insulator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a high-voltage fuse. A high-voltage fuse (1) is provided with a lower cover (58) at a lower-end opening part (14) of a main body insulator (10); and the lower cover (58) isprovided with a closed bolt (59) in a detachable way. In the high-voltage fuse (1), the fragments of insulator are fastened on the inner wall (14a) of the lower-end opening part (14) of the main bodyinsulator (10), thus forming a slight bulge (16); a gap facing to the lower cover (58) and the inner wall (14a) is coated with adhesive (17); and the lower cover (58) is fastened on the main body insulator (10). Therefore, the inner wall (14a) of the lower-end opening part (14) of the main body insulator (10) forms a non-smooth surface; and the clamping area of the inner wall (14a) of the lower-end opening part (14) of the main body insulator (10) and the adhesive is increased. Therefore, the lower cover (58) can not be separated from the main body insulator (10) when a fuse unit (45) is blown due to heavy current.
Description
Technical field
The utility model relates to a kind of high-tension fuse with main body insulator and lower cover.
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.
Bottom at the main body insulator is provided with lower cover, with the form that can freely load and unload airtight bolt is housed on this lower cover, and this airtight bolt stops invades salt solution, pollutants such as dust from the peristome of lower cover in the main body insulator.When electrical fuse element fused owing to big electric current, airtight bolt broke away from downwards.
Yet, in the high-tension fuse of in above-mentioned document, putting down in writing, fasten by the convex body of lower cover and the groove of fuse tube fixed part, make lower cover be installed on the main body insulator.Therefore, when electrical fuse element fuses owing to big electric current, can occur because the bulbs of pressure of moment generation make airtight bolt not come off from lower cover, and the engaging of convex body and groove is removed, thereby lower cover is broken away from.
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, the high-tension fuse that lower cover does not break away from from the main body insulator when electrical fuse element fuses owing to big electric current.
The utility model is a kind of high-tension fuse, and its lower ending opening portion at the main body insulator has lower cover, with form removably airtight bolt is housed on this lower cover.It is characterized in that: on the inwall of the lower ending opening portion of described main body insulator, be formed with fine protrusions, coated with adhesive in the right space of described lower cover and described internal face, and described lower cover is fastened on the described main body insulator.
Based on the utility model, in high-tension fuse, lower cover does not break away from from the main body insulator when electrical fuse element fuses owing to big electric current.
Description of drawings
Fig. 1 is the profile of high-tension fuse.
Fig. 2 is the profile of main body insulator.
Fig. 3 is the lower end profile of high-tension fuse.
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, 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-connecting line, 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, 46a-press-fits terminal, 47-bottom contact, 48-display barrel, the 49-spring, the 50-trip bolt, 54-engages protuberance, the 56-stationary fixture, the 57-flat spring, 58-lower cover, 58a-minor diameter part, the 58b-large-diameter portion, 58c-is disconnected domatic, 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.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.
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.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.
As shown in Figures 2 and 3, in the lower ending opening portion 14 of bottom compartment 12, fixedly mounting the lower cover 58 of closed lower peristome 14.On lower cover 58, to load and unload possible form airtight bolt 59 is housed, these airtight bolt 59 airtight lower cover 58 peristome 58d.Airtight bolt 59 is kept by the flat spring 57 that is fixed on the lower cover 58.Cover on 58 the 14 inwall 14a of lower ending opening portion facing toward, be formed with fine protrusions 16.Fine protrusions 16 is to form by the inwall 14a that the fragment with insulator is fastened on lower ending opening portion 14.Lower cover 58 forms the approximate circle tubular, is made of minor diameter part 58a and large-diameter portion 58b, is formed with disconnected domatic 58c at two ones boudary portions.On the outer peripheral face of minor diameter part 58a, be formed with tongue and groove 58e.The outer diameter D 2 of minor diameter part 58a is littler than the inside diameter D 1 of the inwall 14a of lower ending opening portion 14.The outer diameter D 3 of large-diameter portion 58b is bigger than the inside diameter D 1 of the inwall 14a of lower ending opening portion 14.
In the time of in the lower ending opening portion 14 that lower cover 58 is installed in main body insulator 10, in the inwall 14a of lower ending opening portion 14 coated with adhesive 17.Then, the disconnected domatic 58c of lower cover 58 is connected to the lower surface of main body insulator 10, and the space between the outer peripheral face of the inwall 14a of lower ending opening portion 14 and the minor diameter part 58a of lower cover 58 is filled by the adhesive 17 of scheduled volume.
That is to say, by being fastened on the fine protrusions 16 on the 14 inwall 14a of lower openings portion and being formed on tongue and groove 58e on the minor diameter part 58a outer peripheral face of lower cover 58, can make that to consolidate ground between the outer peripheral face of minor diameter part 58a of the inwall 14a of lower ending opening portion 14 and lower cover 58 bonding.
As shown in Figure 1, 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 fuse 44 of 46 series connection assemblings of electrical fuse element 45 and fuse.At the front end of fuse 44, be provided with and form 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.Be provided with in the end of fuse lead-in wire 46 have a breach recess press-fit terminal 46a.
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, will press-fit terminal 46a simultaneously at compression spring 49 and hang 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.
Based on the execution mode of above explanation, can obtain following action effect.
(1) on the inwall 14a of the lower ending opening portion 14 of main body insulator 10, formed fine protrusions 16.Thus, the inwall 14a of the lower ending opening portion 14 of main body insulator 10 becomes non-round slip surface, and the inwall 14a of the lower ending opening portion 14 of main body insulator 10 increases with the area that engages of adhesive 17.For example, if because the foozle of main body insulator 10 makes big than supposition of the inside diameter D 1 of lower ending opening portion 14 of main body insulator 10, it is big that the inwall 14a of the lower ending opening portion 14 of main body insulator 10 and the space L1 between the lower cover 58 just become.Only lean on the intensity of the adhesive 17 of scheduled volume,, the situation of the bulbs of pressure that can't stand instantaneous generation can occur holding because the engaging area is little.
Even in these cases, promptly since the inwall 14a of the lower ending opening portion 14 of foozle main body insulator 10 and the space L1 between the lower cover 58 become under the big situation, because the inwall 14a of the lower ending opening portion 14 of main body insulator 10 and the engaging area of adhesive 17 increase, so lower cover 58, can be at electrical fuse element 45 owing to come off from main body insulator 10 during big current fusing.
(2) fine protrusions 16 is last formation of the 14 inwall 14a of lower ending opening portion that are fastened on body insulator 10 by the fragment with insulator.Thus, and form fine protrusions by mould and compare, can easily form fine protrusions 16.
(3) on the outer peripheral face of lower cover, formed tongue and groove.Thus, by being fastened on the fine protrusions 16 on the 14 inwall 14a of lower ending opening portion and being formed on tongue and groove 58e on the minor diameter part 58a outer peripheral face of lower cover 58, the bonding effect that can consolidate.
Claims (3)
1, a kind of high-tension fuse, its lower ending opening portion at the main body insulator has lower cover, with form removably airtight bolt is housed on this lower cover; It is characterized in that:
On the inwall of the lower ending opening portion of described main body insulator, be formed with fine protrusions, coated with adhesive in the right space of described lower cover and described internal face, and described lower cover is fastened on the described main body insulator.
2, high-tension fuse according to claim 1 is characterized in that:
Described fine protrusions is to be fastened on described inwall by the fragment with insulator to form.
3, high-tension fuse according to claim 1 and 2 is characterized in that:
On the outer peripheral face of described lower cover, be formed with tongue and groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201611736U CN201435366Y (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201611736U CN201435366Y (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201435366Y true CN201435366Y (en) | 2010-03-31 |
Family
ID=42054181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201611736U Expired - Fee Related CN201435366Y (en) | 2009-06-30 | 2009-06-30 | High-voltage fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201435366Y (en) |
-
2009
- 2009-06-30 CN CN2009201611736U patent/CN201435366Y/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: 20100331 Termination date: 20150630 |
|
| EXPY | Termination of patent right or utility model |