CN2667652Y - Spraying fuse - Google Patents
Spraying fuse Download PDFInfo
- Publication number
- CN2667652Y CN2667652Y CN 200320103348 CN200320103348U CN2667652Y CN 2667652 Y CN2667652 Y CN 2667652Y CN 200320103348 CN200320103348 CN 200320103348 CN 200320103348 U CN200320103348 U CN 200320103348U CN 2667652 Y CN2667652 Y CN 2667652Y
- Authority
- CN
- China
- Prior art keywords
- moving contact
- arc
- extinguishing tube
- arc extinguishing
- fuse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a jet fuse, solving the problem that the electric arc is incapable of completely belching out from the two ends of the arc extinguishing tube when the accident happened, comprising a compound isolating bracket with a layered umbrella skirt as well as an arc extinguishing tube with an upper moving contact and a lower moving contact; the upper moving contact is provided with an external thread which is arranged on the external wall of the connecting of the upper moving contact and the arc extinguishing tube, and the arc extinguishing tube is provided with an internal thread which is arranged on the internal wall of the connecting of the upper moving contact and the arc extinguishing tube, the external thread of the upper moving contact is closely matched with the internal thread of the arc extinguishing tube. Because the moving contacts and the arc extinguishing tube are fixedly connected with each other directly through the threads, having a big acting surface, so when accident happened, the electric arc is capable of completely belching out from the two ends of the arc extinguishing tube, preventing the electric arc to short circuit.
Description
Technical field
The utility model relates to a kind of expulsion fuse.
Background technology
Existing expulsion fuse is in hollow outer has the compound inslation support of full skirt, pack into and be built-in with the arc-extinguishing tube of fuse, peg graft by the last moving contact of arc-extinguishing tube and the upper static contact on insulating support top, the following fixed contact of the lower moving contact of arc-extinguishing tube and insulating support bottom is pegged graft, and draws by terminals up and down respectively.Like this when fuse passes through short circuit current or overcurrent; fuse produces high temperature by big electric current and is fused; when disconnecting, produce electric arc; the gas that electric arc produces sprays from the arc-extinguishing tube two ends; so be expulsion fuse; the effect of pulling force bob simultaneously and the extension spring that is connected with the pulling force bob are extracted the fuse connecting line rapidly out from fire-retardant fuse tube, disconnect fault current, thereby reach the purpose of protection equipment.The existing moving contact of going up is to insert the interior screw by arc-extinguishing tube one side of arc-extinguishing tube to fix upward moving contact, because of this screw acting surface little, like this when having an accident, electric arc then can be washed this screw open, and make electric arc from then on spray in the screw, cause electric arc is caused outside the arc-extinguishing tube, electric arc can not easily be short-circuited fully from the ejection of arc extinguishing two ends.
Summary of the invention
In order to overcome above-mentioned shortcoming, the utility model provides a kind of expulsion fuse that arc energy is sprayed from the arc-extinguishing tube two ends fully.
The utility model expulsion fuse, comprise the compound inslation support that has stacked full skirt outward, the arc-extinguishing tube that has lower moving contact, described go up moving contact with the outer wall of arc-extinguishing tube junction on be provided with external screw thread, described arc-extinguishing tube with the inwall of last moving contact junction on be provided with internal thread, describedly go up the external screw thread of moving contact and the internal thread of arc-extinguishing tube closely cooperates.
Because of adopting moving contact and arc-extinguishing tube, the utility model directly directly is fixed together by screw thread, because the diameter of last moving contact is than big many of the diameter of the screw of arc-extinguishing tube one side, so acting surface is bigger, make when having an accident, arc energy sprays fully from the arc-extinguishing tube two ends, has prevented arc short circuit.
Description of drawings
Fig. 1 is the general assembly schematic diagram of the utility model expulsion fuse.
Fig. 2 is the partial schematic sectional view of arc-extinguishing tube in the utility model expulsion fuse among Fig. 1.
Fig. 3 is the A-A cross-sectional schematic of the utility model expulsion fuse among Fig. 1.
Embodiment
With reference to Fig. 2, the utility model expulsion fuse, last moving contact 1 with the outer wall of arc-extinguishing tube 2 junctions on be provided with external screw thread, arc-extinguishing tube 2 with the inwall of last moving contact 1 junction on be provided with internal thread, the internal thread of the external screw thread of last moving contact 1 and arc-extinguishing tube 2 closely cooperates.Because the diameter of last moving contact 1 so acting surface is bigger, makes that arc energy sprays fully from arc-extinguishing tube 2 two ends, has prevented arc short circuit when having an accident than big many of the diameter of the screw of arc-extinguishing tube 2 one sides.With reference to Fig. 3, further improve as the utility model, the longitudinal section of lower moving contact 3 is circular, and following fixed contact 4 is an arcs of recesses on the surface with the joint both sides of lower moving contact 3, and the outer surface of circular lower moving contact 3 matches with following fixed contact 4 both sides concave curved surface.Like this, increased the contact-making surface of lower moving contact 3 with following fixed contact 4, again because the outer surface of circular lower moving contact 3 matches with following fixed contact 4 both sides concave curved surface, circular lower moving contact 3 there is certain locking function, increased the chucking power of 4 pairs of lower moving contacts 3 of time fixed contact, reduce contact resistance, prevented the generation of fault-free outage.
Further improve as the utility model, with reference to Fig. 1, the diameter of ground floor full skirt 5 of compound inslation support that has stacked full skirt in the utility model is big than other layers full skirt diameter, like this, increased creep distance and antifouling water-resistant performance, made it be more suitable for the heavily contaminated area.
In the prior art, when having an accident outage, effect that pulling force weighs down and the extension spring that is connected with the pulling force bob are extracted the fuse connecting line rapidly out from fire-retardant fuse tube, disconnect fault current, thereby reach the purpose of protection equipment.But, and, have little electric current and pass through because of it is fixed between moving contact and fuse be because of the extension spring long term, long-term work then can be generated heat, cause extension spring to be lost efficacy, further improve as the utility model expulsion fuse, the utility model expulsion fuse does not have the extension spring structure.
Claims (3)
1, a kind of expulsion fuse, comprise the compound inslation support that has stacked full skirt outward, the arc-extinguishing tube that has lower moving contact, it is characterized in that: described go up moving contact with the outer wall of arc-extinguishing tube junction on be provided with external screw thread, described arc-extinguishing tube with the inwall of last moving contact junction on be provided with internal thread, describedly go up the external screw thread of moving contact and the internal thread of arc-extinguishing tube closely cooperates.
2, expulsion fuse as claimed in claim 1, it is characterized in that: the longitudinal section of described lower moving contact is for circular, described down fixed contact is an arcs of recesses on the surface with the joint both sides of lower moving contact, and the outer surface of described circular lower moving contact matches with following fixed contact both sides concave curved surface.
3, expulsion fuse as claimed in claim 1 is characterized in that: the diameter of the ground floor full skirt of the described compound inslation support that has a stacked full skirt is big than other layers full skirt diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103348 CN2667652Y (en) | 2003-11-14 | 2003-11-14 | Spraying fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103348 CN2667652Y (en) | 2003-11-14 | 2003-11-14 | Spraying fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2667652Y true CN2667652Y (en) | 2004-12-29 |
Family
ID=34340499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320103348 Expired - Fee Related CN2667652Y (en) | 2003-11-14 | 2003-11-14 | Spraying fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2667652Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229240A (en) * | 2016-08-29 | 2016-12-14 | 河北冀高电力器材开发有限公司 | A kind of outdoor high-voltage blast enclosure fuse |
-
2003
- 2003-11-14 CN CN 200320103348 patent/CN2667652Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229240A (en) * | 2016-08-29 | 2016-12-14 | 河北冀高电力器材开发有限公司 | A kind of outdoor high-voltage blast enclosure fuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |