CN2381017Y

CN2381017Y - 10KV outdoor high-voltage knife-type fuse

Info

Publication number: CN2381017Y
Application number: CN 98231153
Authority: CN
Inventors: 湛国顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-05
Filing date: 1998-08-05
Publication date: 2000-05-31
Anticipated expiration: 2008-08-05

Abstract

The utility model discloses a knife-type fuse for the short circuit and overload protection at the wire inlet side of a 10KV power distribution line and a transformer. The utility model is composed of an insulated porcelain bottle, a contact conductive system and a knife, wherein, the knife comprises an upper and a lower contacts, a bakelite plate and a fuse, the bakelite board as the middle section of the knife is connected with the upper and the lower contacts with insulation, and the fuse and the bakelite board are is connected between the upper and the lower contacts in parallel. The upper contact of the knife is closed with an elastic clamp seat during normal operation, and the lower contact has a framework structure. Two sides of a framework are provided with extended hinge shafts arranged in a bending hook of a lower supporting seat, and the knife can rotate around the hinge shafts after pulled from the elastic clamp seat.

Description

10kv outdoor high-voltage guillotine type fuse

The utility model relates to distribution line that a kind of rated voltage is 10kv and distribution and becomes device inlet wire side and make the fuse that short circuit and overload protection are used.

The secondary step-down distribution line of power network and transformer inlet wire side voltage thereof are generally the 6-10 kilovolt; its fuse as short circuit and overload protection is generally high-voltage explosion fuse; it is made up of three parts such as porcelain insulator, contact conducting system and fusion tubes, and fuse is housed in the fusion tube.Its operation principle is: when operate as normal, fuse makes the turning joint locking on the fusion tube, so fusion tube can be in "on" position under the pressure of upper contact head; During for fuse failure, produce electric arc in fusion tube, the expulsion tube of fusion tube liner decomposites a large amount of gases under arcing, and what generation was strong when current over-zero removes liberation and extinguish arcs.Because fuse failure, turning joint discharges and makes fusion tube sagging then, falls rapidly under the effect of the elastic force of contact up and down and fusion tube deadweight, forms tangible breaking gap.But because of this fuse exposes to the sun and rain in the open air throughout the year, work under bad environment, cause each contact loose contact, often emit electric arc and scaling loss, the elastic force of contact is malfunctioning about also normal the appearance, fuse fuses and does not fall, because of fuse is contained in the fusion tube, so fusion tube does not fall, the operations staff is difficult for finding that fuse fuses again, fuse is in time changed in influence, causes improper power failure.

The purpose of this utility model provides a kind of novel outdoor high-voltage fuse, and it can make each contact keep excellent contact, makes distribution line and distribution transformer reliable, can in time find and obtain to change behind fuse failure.

Solution of the present utility model is as follows: design a kind of guillotine type fuse and substitute above-mentioned fuse switch, this guillotine type fuse is the fusion tube that replaces fuse switch with the plug-in strip of band fuse, other parts and fuse switch are roughly the same, comprise binding, porcelain insulator, end bolt, go up undersetting, parts such as shell fragment contact, draw ring, plug-in strip and elasticity holder up and down.This plug-in strip is made of up and down contact, fuse, bakelite plate, and bakelite plate is the stage casing of plug-in strip, connects with contact insulation up and down, fuse and bakelite plate are connected in up and down between the contact side by side, the elasticity holder is installed on the upper bracket, and during operate as normal, plug-in strip upper contact head and elasticity holder close a floodgate.The following contact of described plug-in strip is a kind of frame structure, there is the jointed shaft that stretches out the frame both sides, and are installed in the crotch of undersetting both sides, and plug-in strip can rotate around jointed shaft after pulling out the elasticity holder, following shell fragment contact stretches in this frame, and keeps good contact with it.

During operate as normal, high voltage source is connected through fuse and distribution transformer, and when short circuit or overload, fuse is fused, because of its not in fusion tube, so can in time find after the fusing, then,, plug-in strip is pulled out the replacing fuse from the elasticity holder with hook rod rhampotheca draw ring.

The utility model and fuse switch relatively have following superiority: 1. can keep conduction and protect the complete reliable of these two functions, can stop improper power failure; 2. the dynamic and static contact of this plug-in strip is the contact of holder formula, and contact-making surface is big, can keep good contact, can not singe because of electric arc; 3. contact and holder adopt the red copper material, in the open air for a long time can corrosion; 4. the high-strength plastic plank is adopted in the plug-in strip stage casing, has very strong anti-Japanese solarization weathering energy side such as drench with rain, and is more much longer than the useful life of fusion tube; 5. contact is the frame structure under the plug-in strip, makes not have on the whole to vacillate now to the left, now to the right; 6. it is easy to loading and unloading to change fuse, and the hook rod is still used in operation, need not increase operation tool in addition.

Fig. 1 is a structural front view of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1.

Accompanying drawing has been described an embodiment of the present utility model, and the utility model is described in further detail below in conjunction with drawings and Examples.

Binding 1 is fastened on porcelain insulator 2 on the leading-in bracket, end bolt 3 is used for the joining power line, upper bracket 4, last shell fragment contact 6, following shell fragment contact 15, undersetting 14 are the contact conducting system, last shell fragment contact 6 is contained on the upper bracket 4, upper bracket 4 links up with a last end bolt 3 again, following shell fragment contact 15 is contained on the undersetting 14, and undersetting 14 links up with next end bolt 3 again.The plug-in strip that substitutes fusion tube is made of upper contact head 7, following contact 11, bakelite plate 10, fuse 9, bakelite plate 10 is stage casings of this plug-in strip, it connects with

upper contact head

7 and 11 insulation of following contact respectively at two ends up and down, 9 of fuses and bakelite plate 10 are connected between upper contact head 7 and the following contact 11 side by side, become the path of distribution line.When operate as normal, upper contact head 7 closes a floodgate with the elasticity holder 5 that is contained on the upper bracket 4, and at draw ring 8 of the outside of upper contact head 7 welding, is used to operate a switch and close a floodgate.This time contact 11 is made into the frame structure, there is the jointed shaft 12 that stretches out the frame both sides, and are installed in the crotch 13 of undersetting 14 both sides, and plug-in strip can rotate about 180 ° around this jointed shaft 12 after pulling out elasticity holder 5, following shell fragment contact 15 stretches in this frame, keeps good contact with it.Cause is this frame structure of contact 11 down, makes plug-in strip integral body unlikely swinging when loading and unloading.

Claims

1. 10KV outdoor high-voltage guillotine type fuse; comprise binding; porcelain insulator; end bolt; last undersetting; shell fragment contact up and down; draw ring; parts such as plug-in strip and elasticity holder; binding is fastened on porcelain insulator on the leading-in bracket of distribution line; end bolt is a power-line terminal; last undersetting constitutes with shell fragment contact up and down and contacts conducting system; the rhampotheca position of hook rod when draw ring is the loading and unloading fuse; it is characterized in that the fuse as distribution line and side short circuit of distribution transformer inlet wire and overload protection is the guillotine type fuse; this plug-in strip comprises contact up and down; fuse; bakelite plate; bakelite plate is the stage casing of plug-in strip; connect with the insulation of contact up and down; fuse and bakelite plate are connected in up and down between the contact side by side; the elasticity holder is installed on the upper bracket, and during operate as normal, plug-in strip upper contact head and elasticity holder close a floodgate.

2. 10kv outdoor high-voltage guillotine type fuse according to claim 1, it is characterized in that contact is a kind of frame structure under the plug-in strip, there is the jointed shaft that stretches out the frame both sides, be installed in the crotch of undersetting both sides, plug-in strip can rotate around jointed shaft after pulling out the elasticity holder, following shell fragment contact stretches in this frame, and keeps good contact with it.