CN205104468U - High -tension drop type fuse with accelerating device - Google Patents
High -tension drop type fuse with accelerating device Download PDFInfo
- Publication number
- CN205104468U CN205104468U CN201520833355.9U CN201520833355U CN205104468U CN 205104468 U CN205104468 U CN 205104468U CN 201520833355 U CN201520833355 U CN 201520833355U CN 205104468 U CN205104468 U CN 205104468U
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- fusion tube
- contact
- upper cover
- moving contact
- terminal
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Abstract
The utility model discloses a high -tension drop type fuse with accelerating device, including insulating vase, go up the terminal, down the terminal, down movable contact seat, fusion tube subassembly, go up the backup pad, go up and be fixed with terminal, upward stationary contact headstock, pressure spring and preforming in the backup pad, the upper cover butt of preforming and fusion tube subassembly, it is provided with spherical groove to go up the stationary contact headstock, spherical groove corresponds with the spherical tip of last moving contact, it fixes integratively with the upper cover of fusion tube subassembly to go up the moving contact, the preforming is insulating material. The utility model has the advantages that: because the diameter of preforming is greater than the diameter of upper cover, like this, the moving contact cap has guaranteed that electric arc goes out in that the arc extinguishing is intraductal, has avoided burning of last contact position parts through certain slip time delay on the drop -out current in -process, in addition, adopt the connection of spherical sound contact, increased area of contact, guaranteed the reliability of electric connection.
Description
Technical field
The utility model relates to field of electrical equipment, is a kind of fuse switch specifically.
Background technology
The outdoor drop-out fuse of current use is used for overhead distribution system, provides the visible instruction of overcurrent protection, fault-current protection and fuse member action.Because it has visible fracture intuitively, and when using together with load cut-off, the effect playing on-load switch can cut-off load current, creates safe operational environment to maintenance circuit and plant maintenance, is used widely.
But in electric line, the high voltage drop-out type fuse cutout generally used at present, the drop speed of its fusion tube mainly opposition of gas in the active force of turnover panel and fusion tube on the lower, but the drop finite rate of fusion tube.When break down electric current time fuse member fusing, cause fusion tube drop, fusion tube drop speed is unhappy just easily causes electric arc, and the time, more long arc was longer.The burning of electric arc impacts damage equipment simultaneously to system.Given this design feature is for avoiding the arcing time long, and the drop speed of fusion tube just must be allowed to accelerate, and how to design and possess the outdoor ac high voltage drop fuse of device can accelerating fusion tube drop and also become the main R&D direction of present manufacturer.Chinese Patent Application No. 201210273854.8 discloses a kind of outdoor ac high voltage drop fuse, and be provided with an accelerator in the side of hook, one end of accelerator contacts with the fusion tube pressed on ring of fusion tube component; This structure can accelerate the separating rate of fusion tube component and upper end contact, but due to too fast separation, the upper cover of fusion tube component is also separated fast with compressing tablet, and cause the upper cover of fusion tube component to depart from, upper moving contact part is easily burnt by high-temperature electric arc.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of fuse switch preventing upper contact head part from not easily burning, and concrete technical scheme is as follows:
A kind of high voltage drop-out type fuse cutout, comprise and draw together porcelain insulator, upper terminal, lower terminal, lower moving contact seat, fusion tube component, upper backup pad, upper backup pad is fixed with upper terminal, upper static contact seat, stage clip and compressing tablet, described compressing tablet abuts with the upper cover of fusion tube component; Described upper static contact seat is provided with spherical groove, and described spherical groove is corresponding with the ball-shaped end of upper moving contact; The upper cover of described upper moving contact and fusion tube component is integrally fixed; Described compressing tablet is insulating material.
Described upper static contact seat arranges stage clip, and the end of described stage clip arranges top board.
Described compressing tablet is basin type, and the base diameter of described basin type and the diameter of described upper cover are than being 2:1.
The limit of described basin type and the angle of horizontal plane are 15 degree.
The utility model has the advantages that: the diameter due to compressing tablet is greater than the diameter of upper cover, like this, in drop-out current process, moving contact cap is through certain slip time delay, ensure that electric arc extinguishes in arc-extinguishing tube, avoids burning of upper contact head location component; In addition, adopt the connection of spherical dynamic/static contact, add contact area, ensure that the reliability of electrical connection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the syndeton schematic diagram of fusion tube component and upper static contact.
Embodiment
The utility model is illustrated below in conjunction with accompanying drawing, as shown in Figure 1 and Figure 2, the utility model comprises draws together porcelain insulator 1, upper terminal 6, lower terminal 2, lower moving contact seat 3, fusion tube component 4, upper backup pad 5, upper backup pad 5 is fixed with upper terminal 6, upper static contact seat 7, stage clip 11 and compressing tablet 10, described compressing tablet 10 abuts with the upper cover 12 of fusion tube component 4; Described upper static contact seat 7 is provided with spherical groove 9, and described spherical groove is corresponding with the ball-shaped end 8 of moving contact on 9; The upper cover of described upper moving contact and fusion tube component is integrally fixed; Described compressing tablet 10 is insulating material.
For accelerating to be separated fusion tube component, described upper static contact seat 7 arranges stage clip, and the end of described stage clip arranges top board 13, and described top board 13 abuts with described upper cover.When being separated when fusing, compressing tablet outwards ejects by stage clip, can accelerate falling of fusion tube component.
Described compressing tablet 10 is basin type, and the base diameter of described basin type and the diameter of described upper cover are than being 2:1.
The limit of described basin type and the angle a of horizontal plane are 15 degree.
Principle of the present utility model is:
1, for fuse installation fuse, time, with compressing tablet, the upper cover of fusion tube component is compressed, and be anchored on lower moving contact by stretching for fuse, make limiting plate be in energy storage position, the limited plate locking of lower moving contact, thus be in the position with upper moving contact ultimate range.
2, when the drop type pipe assembly that closes, stage clip generation deformation and then make compressing tablet form certain pressure to upper cover, under pressure, switch remains on combined floodgate operating state.
3, when there being the fault currents such as overload or short circuit, fuse failure, fuse pulls out by the limiting plate at lower moving contact place under the effect of torsion spring potential energy, the action of limiting plate loses the confining force with upper moving contact longest distance by making lower moving contact, under the effect of self gravitation with upper static contact pressure, fusion tube component will fall disconnection rapidly, forms obvious cut-off point.
4, when carrying out sub-switching operation, insulated tension pole only need be adopted to entangle operation ring on pipe assembly, firmly pull open downwards along the direction that lower moving contact rotates, until pipe assembly is in nature fall suspension status.
Feature of the present utility model:
1, employing automatic gas-producing indulges the arc quenching principle that arc blow-out combines with the powerful arcing of torsion spring; Fusion tube adopts single-ended exhaust structure, when ensure from be overload up to short-circuit current reliably cut-off, effectively prevent from cut-offfing spray arc and the circuit above fuse or equipment caused damage.
2, embedded wedge-like or spherical silver plated contact is adopted, contact performance is good, the upper moving contact cap of upper static contact to pipe assembly imposes normal pressure, effectively ensure that conductive contact is good and cut-off reliably falling of rear fusion tube component, in drop-out current process, upper cover is through certain slip time delay, ensure that electric arc extinguishes in arc-extinguishing tube, prevent moving contact cap arcing scaling loss.
3, this type fuse adopts large distance high-strength porcelain, and powerful bending strength and shock-resistant ability ensure that the break performance of drop type and the reliability of operation.
4, fusion tube adopts epoxy fibreglass to add vulcan fibre and be composited, and fully ensure that the specified resistance to quick-fried ability of cut-offfing of pipe assembly and small area analysis connecting-disconnecting function; Multiple tube is coated with antiultraviolet insulating varnish outward, effectively improves the useful life of pipe assembly.
Claims (3)
1. one kind has the high voltage drop-out type fuse cutout of accelerator, it is characterized in that: comprise porcelain insulator, upper terminal, lower terminal, lower moving contact seat, fusion tube component, upper backup pad, upper backup pad is fixed with upper terminal, upper static contact seat, stage clip and compressing tablet, described compressing tablet abuts with the upper cover of fusion tube component; Described upper static contact seat is provided with spherical groove, and described spherical groove is corresponding with the ball-shaped end of upper moving contact; The upper cover of described upper moving contact and fusion tube component is integrally fixed; Described compressing tablet is insulating material; Described upper static contact seat arranges stage clip, and the end of described stage clip arranges top board.
2. high voltage drop-out type fuse cutout according to claim 1, is characterized in that: described compressing tablet is basin type, and the base diameter of described basin type and the diameter of described upper cover are than being 2:1.
3. high voltage drop-out type fuse cutout according to claim 2, is characterized in that: the limit of described basin type and the angle of horizontal plane are 15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520833355.9U CN205104468U (en) | 2015-10-26 | 2015-10-26 | High -tension drop type fuse with accelerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520833355.9U CN205104468U (en) | 2015-10-26 | 2015-10-26 | High -tension drop type fuse with accelerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205104468U true CN205104468U (en) | 2016-03-23 |
Family
ID=55520229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520833355.9U Active CN205104468U (en) | 2015-10-26 | 2015-10-26 | High -tension drop type fuse with accelerating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205104468U (en) |
-
2015
- 2015-10-26 CN CN201520833355.9U patent/CN205104468U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |