CN202332689U

CN202332689U - Internal air guide cylinder of sulfur hexafluoride breaker

Info

Publication number: CN202332689U
Application number: CN2011204574967U
Authority: CN
Inventors: 郑彧; 韩勇
Original assignee: BEIJING BEIKAI ELECTRICAL Co Ltd
Current assignee: BEIJING BEIKAI ELECTRICAL Co Ltd
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-07-11
Anticipated expiration: 2021-11-18

Abstract

The utility model belongs to an internal air guide cylinder of a sulfur hexafluoride breaker, which mainly comprises a porcelain cylindrical shell, a breaker element, an upper casting and a lower casting, wherein the inner circumference wall of the upper end of the upper casting is provided with hot air holes at intervals; the lower end of the air guide cylinder supports against the inner circumference wall of the upper casting at the lower end of the hot air holes in a manner of spacing a distance through a polytetrafluoroethylene bushing; the upper end of the air guide cylinder is fixed in an air guide cover at the upper end of an upper cover; and an S-shaped channel is arranged between the outer wall of the air guide cylinder and the upper casting. The internal air guide cylinder disclosed by the utility model can ensure that hot air can disperse fast when an arcing contact is disconnected to enable the influence of the hot air on connection and disconnection to be reduced to be minimum, overcomes the defect that the insulation strength at a fracture inside an arc extinguishing chamber is reduced due to hot air, ensures safety of equipment operation and has the advantages of simple structure, safety, stability, reliability and long service life.

Description

The inner gas cylinder of sulfur hexafluoride breaker

Technical field

The utility model belongs to the inner gas cylinder of a kind of sulfur hexafluoride breaker.

Background technology

4 porcelain knob sulfur hexafluoride breakers are in separating brake, because the hot gas behind the fracture arc blow-out returns the position of major loop (radome and moving main contact between) rapidly, cause major loop to puncture because of the dielectric strength of medium descends significantly, cause cut-offfing failure.When cut-offfing big electric current, the sound arcing contact can produce a lot of metallic vapours and dust through the calcination of electric arc, and along with the process of SF6 (sulphur hexafluoride) gas-blast, these metallic vapours and a large amount of hot gas can be gone to the incision position of major loop rapidly.Major loop is when separating brake, and main fingertip and moving main contact also can produce a part of metallic dust, is accompanied by the arc loop and blows over next metal vapors, and the medium dielectric strength at moving arcing contact place reduces greatly, and is breakdown under the effect of high pressure, the safety of harm equipment operation.

Summary of the invention

The purpose of the utility model is the inner gas cylinder of a kind of sulfur hexafluoride breaker of design; Thermal current can shed rapidly in the time of guaranteeing that arcing contact cut-offs; It is minimum that thermal current is dropped to the influence of cut-offfing, and it is inner because thermal current causes the shortcoming of incision position dielectric strength decline to overcome arc control device, guarantees the safety of equipment operation; Have simple in structure, the advantage of the reliable and long service life of safety and stability.

The utility model mainly is made up of porcelain knob shell, circuit breaker element, last foundry goods and following foundry goods; Spacing distance is provided with the hot blast hole on the internal perisporium of last foundry goods upper end; The gas cylinder lower end holds from the last foundry goods internal perisporium with lower end, hot blast hole through polytetrafluoroethylene cover spacer; The gas cylinder upper end is fixed in the air guide lid of loam cake upper end, is provided with S type passage between gas cylinder outer wall and the last foundry goods.End periphery and loam cake are tightly connected under the described air guide lid.Described hot blast hole is positioned at the foundry goods upper end.Be divided into electric apparatus room, heat conduction chamber and heat dissipation chamber from top to bottom in the foundry goods under described, round air dispelling hole gathers on heat dissipation chamber's perisporium.The described foundry goods of going up connects through the interior space of gas cylinder upper end and porcelain knob shell.The said structure design has realized the purpose of the utility model.

Thermal current can shed rapidly when the utility model can guarantee that arcing contact cut-offs; Make thermal current drop to minimum to the influence of cut-offfing; It is inner because the shortcoming that thermal current causes the incision position dielectric strength to descend to overcome arc control device; Guarantee the safety of equipment operation, have simple in structure, the advantage of the reliable and long service life of safety and stability.

Description of drawings

Fig. 1 is the last foundry goods structural representation of the utility model.

Fig. 2 is the following foundry goods structural representation of the utility model.

Fig. 3 is the local structure structural representation in the top of the utility model.

Fig. 4 is the heat radiation structure structural representation of the utility model.

Specific embodiments

To shown in Figure 4, the inner gas cylinder of a kind of sulfur hexafluoride breaker mainly is made up of porcelain knob shell 10, circuit breaker element 12, last foundry goods 2 and 4 on following foundry goods like Fig. 1.Porcelain knob shell upper and lower end is established loam cake and base 14 sealing porcelain knob shell upper and lower ends.Circuit breaker element, last foundry goods and following foundry goods all are positioned at porcelain knob shell 9.Spacing distance is provided with hot blast hole 1 on the internal perisporium of last foundry goods upper end.Gas cylinder 8 lower ends hold through the last foundry goods internal perisporium that polytetrafluoroethylene overlaps 13 spacing distances and lower end, hot blast hole, and the gas cylinder upper end is fixed in the air guide lid 7 of loam cake 11 upper ends.Be provided with S type passage 15 between gas cylinder outer wall and the last foundry goods.End periphery and loam cake are tightly connected under the described air guide lid, as integrally welded.Described hot blast hole is positioned at the foundry goods upper end.Be divided into electric apparatus room 3, heat conduction chamber 6 and heat dissipation chamber from top to bottom in the foundry goods under described, round air dispelling hole 5 gathers on heat dissipation chamber's perisporium.The described foundry goods of going up connects through the interior space of gas cylinder upper end and porcelain knob shell.

As shown in Figure 4; The utility model is in when work, the thermal current that in divide-shut brake, produces by each arcing contact of circuit breaker respectively up and down end shed, the hot gas that wherein sheds to the upper end is gone to the air guide lid place at top through last foundry goods, gas cylinder; The height of gas cylinder has increased the path of hot gas; Also play simultaneously the effect of certain refrigerating gas, return through S type passage, run downwards along porcelain knob shell inwall again through the hot gas behind the top.The hot gas that sheds to the lower end get into heat dissipation chamber through electric apparatus room, the heat conduction chamber of foundry goods down and by heat dissipation chamber's perisporium on the round air dispelling hole that gathers uniformly from around shed the hot gas porcelain knob shell that sheds the most at last.

In a word; Thermal current can shed rapidly when the utility model can guarantee that arcing contact cut-offs; It is minimum that thermal current is dropped to the influence of cut-offfing, and it is inner because thermal current causes the shortcoming of incision position dielectric strength decline to overcome arc control device, guarantees the safety of equipment operation; Have simple in structure, the advantage of the reliable and long service life of safety and stability.

Claims

1. the inner gas cylinder of a sulfur hexafluoride breaker; Mainly form by porcelain knob shell, circuit breaker, last foundry goods and following foundry goods; It is characterized in that: upward spacing distance is provided with the hot blast hole on the internal perisporium of foundry goods upper end; The gas cylinder lower end holds from the last foundry goods internal perisporium with lower end, hot blast hole through polytetrafluoroethylene cover spacer, and the gas cylinder upper end is fixed in the air guide lid of loam cake upper end, is provided with S type passage between gas cylinder outer wall and the last foundry goods.

2. by the inner gas cylinder of the described sulfur hexafluoride breaker of claim 1, it is characterized in that: end periphery and loam cake are tightly connected under the described air guide lid.

3. by the inner gas cylinder of the described sulfur hexafluoride breaker of claim 1, it is characterized in that: described hot blast hole is positioned at the foundry goods upper end.

4. by the inner gas cylinder of the described sulfur hexafluoride breaker of claim 1, it is characterized in that: be divided into electric apparatus room, heat conduction chamber and heat dissipation chamber from top to bottom in the foundry goods under described, round air dispelling hole gathers on heat dissipation chamber's perisporium.

5. by the described sulfur hexafluoride breaker of claim 1 inside gas cylinder, it is characterized in that: the described foundry goods of going up connects through the interior space of gas cylinder upper end and porcelain knob shell.