CN2290920Y

CN2290920Y - Outdoor a. c high voltage falling fuse

Info

Publication number: CN2290920Y
Application number: CN 96239495
Authority: CN
Inventors: 李义祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-18
Filing date: 1996-12-18
Publication date: 1998-09-09
Anticipated expiration: 2006-12-18

Abstract

The utility model relates to an outdoor AC high voltage falling type fuse which belongs to the power transmission appliance class. On the basis of a fuse composed of an insulator, a guide limiting frame at the upper end, an upper limiting plate, an upper fixed contact, a mounting plate at the middle part, a supporting plate at the lower part, a lower fixed contact, a fuse tube, a fusing wire, a contact seat at the upper end of the fuse tube, an upper moving contact, a lower jacket at the lower end and a lower moving contact hinged on the lower jacket, the upper fixed contact forms a concave shape, the bottom of the upper fixed contact is provided with an arc concave surface, the front end of the upper moving contact is provided with an arc convex surface, the upper end of the lower fixed contact is provided with a concave surface, the lower moving contact is provided with a convex arc surface and the contacts adopt arc surfaces for contact. The utility model has the advantages of increased contact area, good conductivity and obvious power saving effect.

Description

Outdoor ac high voltage drop fuse

The utility model belongs to the transmission of electricity electric type.

Existing high voltage drop-out type fuse cutout be by insulator, be fixed on insulator upper end guide and limit frame and upper limit plate and upper static contact, be fixed on mounting panel, the lower supporting frame that is fixed on the insulator lower end and the following fixed contact at insulator middle part, the pressure releasing cap on cartridge fuse and top and fuse, be fixed on the cartridge fuse upper end last movable contact headstock and last moving contact, be fixed on the cartridge fuse lower end following chuck, be hinged on down lower moving contact on the chuck and half garden axle composition.The problem of this fuse: upper static contact and last moving contact and following fixed contact and lower moving contact are to contact with line and contact, have loose contact and contact area little, make the contact local current increase overheated easy scaling loss, waste of energy is big, insulator is a solid construction, and weight is also bigger.

The purpose of this utility model is: a kind of tangible, durable, lightweight fuse that economizes on electricity is provided.

Technical measures of the present utility model are: with by insulator, be fixed on guide and limit frame and the upper limit plate and the upper static contact of insulator upper end, be fixed on the mounting panel at insulator middle part, be fixed on the lower supporting frame and the following fixed contact of insulator lower end, the pressure releasing cap on cartridge fuse and top and fuse, be fixed on the last movable contact headstock and the last moving contact of cartridge fuse upper end, be fixed on the following chuck of cartridge fuse lower end, it be basic being hinged on down the fuse that lower moving contact on the chuck and semicircle axle form, upper static contact is a concave shape, arc-shaped concave is arranged at the bottom, the last moving contact front end that is riveted on the movable contact headstock has arc convex, the upper end of following fixed contact is a concave arc surface, and the lower moving contact upper end is the convex face.

Insulator can adopt the tubulose upper end closed, and each position of the upper, middle and lower of insulator has concave ring groove respectively, and concave ring groove is by U bolt and have the clamping plate of notch to be connected with each metal device.

Fuse of the present utility model, fixed contact all is that face contacts with lower moving contact because upper static contact reaches down with last moving contact, saves the good effect of electric energy so have not generate heat.

Accompanying drawing is a structural representation of the present utility model.

Drawing explanation and embodiment are described below: 1 is insulator among the figure, adopts the tubulose upper end closed, like this can weight reduction; Each position of the upper, middle and lower of insulator 1 has concave ring groove respectively, and concave ring groove is connected with each metal device with the

mounting board

2,12,13 that notch is arranged by U bolt 23, and there are the loosening characteristics that firmly are difficult in this bindiny mechanism.What last mounting board 2 connected by U bolt is that upper static contact 6, upper limit plate 5, spring 4 each part riveted by guide and limit frame, concave shape are the assembly of one.Wherein the guide and limit frame is made up of the leading truck 7 of position-limited rack 10 and anterior fork-shaped; Arc-shaped concave is arranged at upper static contact 6 bottoms of concave shape, on the right facade spacing slotted hole can be arranged, and the right-hand member of upper limit plate 5 inserts among this eldest son, carries out spacing to upper static contact 6; At the insulator middle part by U bolt and mounting board 12 connections are connecting plates 11; Be connected with lower supporting frame 20 in the bottom of insulator by U bolt 23 and mounting board 13 and be fixed on the following fixed contact 14 at lower supporting frame 20 middle parts, following fixed contact 14 adopts stainless steel, and riveted joint is made up of copper coin as backboard, concave arc surface is adopted in the upper end of following fixed contact 14, can increase contact area.16 is cartridge fuses among the figure, the 18th, and fuse.On the top of cartridge fuse 16 are pressure releasing caps 8, the movable contact headstock 9 that is fixed on cartridge fuse 16 upper ends adopts steel-casting, it is durable to increase its intensity, the riveted joint of the front end of contact base 9 be on moving contact A, the front end of last moving contact A has arc convex, makes upper static contact 6 form concavo-convex arcwall face with the contact site of last moving contact A and contacts.In the lower end of cartridge fuse 16 fixing being down the lower moving contact 15 made of chuck 17, punching press be hinged on the side of time chuck 17; The lower end of fuse 18 is fixed on the lower moving contact 15 by bolt 21, and related semicircle axle 19 on moving contact 15 is supported on the support 20.Concave arc surface is adopted in the upper end of lower moving contact 15, makes down fixed contact 14 form arcwall face with lower moving contact 15 and contacts, and the effect that increases contact area, good conductivity is arranged.

Claims

1, a kind of outdoor ac high voltage drop fuse, by insulator, be fixed on insulator upper end guide and limit frame and upper limit plate and upper static contact, be fixed on mounting panel, the lower supporting frame that is fixed on the insulator lower end and following fixed contact, cartridge fuse and the top at insulator middle part pressure releasing cap and fuse, be fixed on last movable contact headstock and last moving contact on the cartridge fuse, be fixed on the cartridge fuse lower end following chuck, be hinged on down that lower moving contact on the chuck and half garden axle form; It is characterized in that:

A, upper static contact are concave shapes, and arc-shaped concave is arranged at the bottom, and the last moving contact front end that is riveted on the movable contact headstock has arc convex;

The upper end of b, following fixed contact is a concave arc surface, and the upper end of lower moving contact is the convex face.

2, by the described fuse of claim 1, it is characterized in that: insulator is the tubulose upper end closed, and each position of the upper, middle and lower of insulator has concave ring groove respectively, and concave ring groove is by U bolt and have the mounting board of notch to be connected with each metal device.