CN207264998U - A kind of protected cut-out - Google Patents
A kind of protected cut-out Download PDFInfo
- Publication number
- CN207264998U CN207264998U CN201721157607.6U CN201721157607U CN207264998U CN 207264998 U CN207264998 U CN 207264998U CN 201721157607 U CN201721157607 U CN 201721157607U CN 207264998 U CN207264998 U CN 207264998U
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- China
- Prior art keywords
- fusible core
- core rod
- fuse
- moving contact
- spring
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Abstract
The utility model discloses a kind of protected cut-out, it includes fuse bodies, fuse bodies upper and lower side is connected with, lower connecting terminal, it is hollow in fuse bodies to be provided with insulation tube, fusible core is provided with insulation tube, be provided with fusible core fuse with it is upper, lower connecting terminal connects, insulation tube upper end is provided with upper static contact and is connected with upper connecting terminal, insulation tube lower end is connected with lower static contact and is connected with lower connecting terminal, the fusible core includes upper moving contact, fusible core rod, lower moving contact, spring I is set between lower moving contact and fusible core rod outer wall upper end, spring II is provided between fusible core rod lower end, accelerate melt fragmentation procedure by way of upper and lower two springs are compressed energy storage and stretching energy storage respectively, reduce the arc time, cushioning effect is played to fusible core rod at the same time, greatly improve the reliability of fuse protection；Fuse lower end sets protecting band at the same time, can effectively prevent the generation of fusible core rod pop-up casualty accident.
Description
Technical field
The fuse in power equipment is the utility model is related to, more particularly to a kind of protected cut-out.
Background technology
Fuse has been a kind of electric appliance of safeguard protection effect, and fuse is widely used in electric network protection and electrical equipment is protected
Shield, when short trouble or overload occur for power grid or electrical equipment, can automatic shutdown circuit, avoid electrical equipment from damaging, prevent
Accident is spread.Fuse is made of insulator foot, contact, melt etc., and melt is the main working parts of fuse, and melt is suitable
In the one section of special conducting wire of series connection in circuit, when short circuit or overload occur for circuit, electric current is excessive, and melt is melted because of overheat
Change, so as to cut off circuit.
Since during operation of power networks, the spring of the fusion tube lower end of protected cut-out is in compressive state for a long time,
In the course of time the spring at the position may follow the string or reduce elastic potential energy, so as to cause when loop current is excessive molten
When body fuses, the time that fusible core departs from can lengthen, and influence arc extinguishing；On the other hand, by the bullet of spring store when being fused due to melt
Property potential energy lower contact is integrally moved up, lower contact can with above fusible core rod occur shock collide with, fusible core rod arc quenching effect can be made
Into certain influence；Meanwhile existing melt after plug falls can generally expose to show blown state from bottom insulation cover bottom,
But it is too quickly when fusible core ejects sometimes, after wiring fracture, fusible core can be deviate from pound earthward from bottom, cause security risk.
The content of the invention
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of reasonable in design, come off
Reliably, safe protected cut-out.
In order to reach foregoing invention purpose, the utility model is achieved through the following technical solutions：
A kind of protected cut-out, it includes fuse bodies, and fuse bodies upper and lower side is connected with upper and lower terminals
Son, it is hollow in fuse bodies to be provided with insulation tube, fusible core is provided with insulation tube, fuse is provided with fusible core and is connect with upper and lower
Line terminals connect, and insulation tube upper end is provided with upper static contact and is connected with upper connecting terminal, and insulation tube lower end is connected with lower static contact
It is connected with lower connecting terminal, the fusible core includes upper moving contact, fusible core rod, lower moving contact, and upper moving contact is fixed on fusible core rod
End, is connected in insulation tube with upper static contact, and lower moving contact is nested with and is connected melting plug outer wall and slided up and down with fusible core rod, under
Moving contact upper end outer wall insertion lower static contact is attached thereto, and spring is set between the lower moving contact and fusible core rod outer wall upper end
Spring II is provided between I, with fusible core rod lower end, the lower end of spring I and the upper end of spring II are fixedly connected with lower moving contact,
The upper end of spring I and the lower end of spring II are fixedly connected with fusible core rod, and fuse upper end is fixedly connected with upper moving contact, lower end from
Fusible core rod bottom is fixedly connected after laying out with lower moving contact.
Under the non-toggle state of fuse, spring I is stretched, spring II is compressed, and upper moving contact is connected with upper static contact,
Lower moving contact is clamped with lower static contact.After fuse failure, spring I, II does work jointly, and fusible core rod is by lower bullet.
The fuse bodies are high-temperature insulation tube body, and the fusible core rod selects alkali-free glass fibre material.
The fuse bodies upper end is provided with insulation water-resisting mask, and lower end is provided with the semiclosed bottom cover of insulation, and half seals
Bottom cover is closed as that can be extended downwardly with fatiscent rubber cover, fusion tube along breach, the fuse bodies lower end is additionally provided with shield
Band, the width of protecting band are more than the diameter of fusible core rod, and both ends and the fuse bottom of protecting band are hinged.
The beneficial effects of the utility model are：When fusible core is installed in place, spring I, which is in, elongates energy storage state, spring II
In compressed energy-storage state, accelerate melt point by way of upper and lower two springs are compressed energy storage and stretching energy storage respectively
Section process, reduces the arc time, plays the role of extending arc extinguishing tube lifetime, while plays cushioning effect to fusible core rod, carries significantly
The reliability of high fuse protection；Fuse lower end sets protecting band at the same time, can effectively prevent the hair of fusible core rod pop-up casualty accident
It is raw.
Brief description of the drawings
Fig. 1 is the front view of the protected cut-out of the utility model；
Fig. 2 is Fig. 1 fusible core structure diagrams.
Embodiment
A kind of protected cut-out as shown in drawings, it includes fuse bodies 8, the connection of 8 upper and lower side of fuse bodies
There is a upper and lower wire connection terminal, it is hollow in fuse bodies to be provided with insulation tube, fusible core is provided with insulation tube, is provided with fusible core
Fuse is connected with upper and lower wire connection terminal, and insulation tube upper end is provided with upper static contact 7 and is connected with upper connecting terminal 6, insulation tube lower end
It is connected with lower static contact 9 to be connected with lower connecting terminal, the fusible core includes upper moving contact 1, fusible core rod 2, lower moving contact 4, upper dynamic
Contact 1 is fixed on 2 upper end of fusible core rod, is connected in insulation tube with upper static contact 7, and lower moving contact 4, which is nested with, is melting plug outer wall simultaneously
Slide up and down and be connected with fusible core rod 2,4 upper end outer wall insertion lower static contact 9 of lower moving contact is attached thereto, the lower moving contact 4
Set between fusible core rod outer wall upper end between spring I 3, with fusible core rod lower end and be provided with spring II 5, the lower end of spring I 3 and
The upper end of spring II 5 is fixedly connected with lower moving contact 4, and the upper end of spring I 3 and the lower end of spring II 5 are fixed with fusible core rod 2 and connected
Connect, fuse upper end is fixedly connected with upper moving contact 1, and lower end is fixedly connected after being laid out from fusible core rod bottom with lower moving contact 4.
Under the non-toggle state of fuse, spring I 3 is stretched, spring II 5 is compressed, upper moving contact 1 and upper static contact 7
Connection, lower moving contact 4 are clamped with lower static contact 9.After fuse failure, spring I 3, II 5 does work jointly, and fusible core rod 2 is by lower bullet.
The fuse bodies are high-temperature insulation tube body, and the fusible core rod selects alkali-free glass fibre material.
The fuse bodies upper end is provided with insulation water-resisting mask, and lower end is provided with the semiclosed bottom cover 10 of insulation, partly
It is to be distributed on bottom cover in radioactive a plurality of slight crack centered on the cover center of circle of bottom with fatiscent rubber cover, breach to close bottom cover 10
On, fusion tube can be extended downwardly along breach, and the fuse bodies lower end is additionally provided with protecting band 11, and the width of protecting band 11, which is more than, to be melted
The diameter of plug, both ends and the fuse bottom of protecting band 11 are hinged, and can stop that service personnel can by protecting band 11 after the pop-up of fusible core rod
Protecting band is pushed on one side by instrument, fusible core rod is ticked into processing.
Above described content, has been shown and described the basic principle, main feature and the utility model of the utility model
The advantages of, It should be understood by those skilled in the art that the present utility model is not limited to the above embodiments, above-described embodiment and say
The principle for simply illustrating the utility model described in bright book, on the premise of not departing from the spirit and scope of the utility model, this
Utility model also has various changes and modifications, and these various changes and improvements fall within the scope of the claimed invention.
Claims (3)
1. a kind of protected cut-out, it includes fuse bodies, and fuse bodies upper and lower side is connected with upper and lower wire connection terminal,
It is hollow in fuse bodies to be provided with insulation tube, fusible core is provided with insulation tube, fuse and upper and lower terminals are provided with fusible core
Son connection, it is characterized in that：Insulation tube upper end is provided with upper static contact and is connected with upper connecting terminal, and insulation tube lower end is connected with down quiet
Contact is connected with lower connecting terminal, and the fusible core includes upper moving contact, fusible core rod, lower moving contact, and upper moving contact is fixed on fusible core
Rod upper end, is connected in insulation tube with upper static contact, and lower moving contact, which is nested with, to be melted plug outer wall and sliding up and down company with fusible core rod
Connect, lower moving contact upper end outer wall insertion lower static contact is attached thereto, and is set between the lower moving contact and fusible core rod outer wall upper end
Spring I is put, spring II is provided between fusible core rod lower end, the lower end of spring I and the upper end of spring II are consolidated with lower moving contact
Fixed connection, the upper end of spring I and the lower end of spring II are fixedly connected with fusible core rod, and fuse upper end is fixed with upper moving contact to be connected
Connect, lower end is fixedly connected after being laid out from fusible core rod bottom with lower moving contact.
2. protected cut-out according to claim 1, it is characterized in that：The fuse bodies are high-temperature insulation pipe
Body, the fusible core rod select alkali-free glass fibre material.
3. protected cut-out according to claim 1, it is characterized in that：The fuse bodies upper end is provided with insulation
Water-resisting mask, lower end are provided with the semiclosed bottom cover of insulation, semiclosed bottom cover be with fatiscent rubber cover, fusion tube can along breach to
Lower stretching, the fuse bodies lower end are additionally provided with protecting band, and the width of protecting band is more than the diameter of fusible core rod, the both ends of protecting band
It is hinged with fuse bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721157607.6U CN207264998U (en) | 2017-09-11 | 2017-09-11 | A kind of protected cut-out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721157607.6U CN207264998U (en) | 2017-09-11 | 2017-09-11 | A kind of protected cut-out |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207264998U true CN207264998U (en) | 2018-04-20 |
Family
ID=61920473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721157607.6U Active CN207264998U (en) | 2017-09-11 | 2017-09-11 | A kind of protected cut-out |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207264998U (en) |
-
2017
- 2017-09-11 CN CN201721157607.6U patent/CN207264998U/en active Active
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| GR01 | Patent grant |