CN1427423A

CN1427423A - AC high voltage sleeve

Info

Publication number: CN1427423A
Application number: CN 01144480
Authority: CN
Inventors: 孟繁恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-19
Filing date: 2001-12-19
Publication date: 2003-07-02

Abstract

An AC high-voltage sleeve pipe for AC high-voltage power equipment or as the wall conduit of AC high-voltage conductor is composed of the insulating external sleeves at both ends, middle connecting sleeve pipe with grounding flange, and capacitor core in said middle connecting sleeve. It features that the insulating medium between conducting rod and capacitor's electrodes is the solidified liquid-state synthetic rubber. Its advantages are high adhesion, low medium loss factor and high stability.

Description

A kind of AC high voltage sleeve

The present invention relates to a kind of ac high-voltage electric power facility bushing, be particularly useful for the sleeve pipe of the bushing that uses on AC input transformation system mesohigh electric equipment, generator, transformer, reactor, circuit breaker and other electric device and high-pressure conductor usefulness through walls.

Usually, the bushing that uses in the ac high-voltage field, the Electric Field Distribution of improving sleeve pipe for adjustment adopts condenser-type terminal more, condenser-type terminal is divided into gluing master mode again owing to the dielectric of filling between pole plate is different, glue soaks master mode, oil immersion master mode sleeve pipe, manufacturing process all adopts the stacked respectively concentric structure that is wound into of dielectric and capacitor plate, but these sleeve pipes are prone to poor sealing, and dielectric becomes damp and rotten between capacitor plate, the dielectric and the capacitor plate coefficient of expansion dielectric dissipation factor that reason causes sleeve pipe such as are mismatched and are become big or partial discharge quantity increases and can not normally move.Developed a kind of condenser-type terminal that twines the traditional dielectric of replacement by polytetrafluoroethylene strip dipping silicone oil in recent years again, owing to think that the polytetrafluoroethylene strip has minimum moisture absorption, slit when its surface impregnation filled with silicone oil strip twines between strip, can prevent that inner partial discharge from taking place, this structure be it is generally acknowledged owing to slit between strip is less, the silicone oil of dipping is not easy to overflow from the slit and can prevents effectively that capacitor core from making moist, thereby think that this structural casing is a dry sleeve, but after this structural casing uses through much amount operations in nearly 2 years, the large-tonnage product dielectric dissipation factor also occurs and become big, inner office puts increase and waits degradation phenomena to cause large-tonnage product normally not move, analyzing its reason, is that liquid silicone oil takes place to shift under gravity state and makes the inner air gap that produces of capacitor core cause internal wetted or electric field polarization to cause the part sleeve pipe to break down.Because bushing costs an arm and a leg, the bushing of unstable properties has influenced the operational reliability of electric power system, and causes very big economic loss.

The capacitive AC bushing that the purpose of this invention is to provide a kind of stable performance.

The following describes its solution:

A kind of AC high voltage sleeve, the two ends insulating coating is provided with capacitor core with the coupling sleeve inside, middle part that has the ground connection ring flange, it is characterized in that: the dielectric between the conducting rod of internal capacitance fuse and each layer capacitance pole plate is to be made by tartan, with the good dielectric property of utilizing rubber, better elastic and with pole plate be coupled well that adhesive property solves capacitor plate and dielectric produces the state in gap because of the difference of the coefficient of expansion; Synthetic rubber dielectric between conducting rod and each layer capacitance pole plate is not to be sulfided into solid-state making by vulcanizing liquid tartan under high temperature or room temperature condition after casting is filled under the state of vacuumizing, so that eliminate gap and bubble between synthetic rubber inside and rubber and pole plate, thereby guarantee the stability of bushing long-time running.

The advantage of this invention is: the capacitor core that it can effectively solve the conventional condenser sleeve pipe causes internal wetted that dielectric loss is increased and partial discharge increases and causes sleeve pipe to puncture destruction owing to dielectric and capacitor plate are easy to generate the gap, improve the service life of sleeve pipe, have than the significant social economic worth.

The invention will be further described below in conjunction with accompanying drawing and an embodiment.

Accompanying drawing is the structural representation of one embodiment of the present of invention.

Multilayer concentric circle capacitor plate (4) is preset in conducting rod (1) outside, conducting rod (1) is fixed by presetting the mould screens with the relative position of concentric circles capacitor plate (4), when synthetic rubber dielectric (5) casting under the liquid state fill finish through high temperature or room temperature vulcanization become solid-state after, (gap between 4 is filled by synthetic rubber dielectric (5) and is constituted the solid capacitor fuse, solid-state capacitor core outside installing two ends insulating coatings (2) and middle part coupling sleeve (3) for conducting rod (1), multi-layer capacity pole plate; The ground outlet (7) of capacitor core end layer capacitance pole plate (4) passes middle part coupling sleeve (3) by insulating sleeve (6), make capacitor plate (4) and middle part sleeve (3) insulation, the intermediate space of capacitor core and insulating coating (2) and middle part coupling sleeve (3) is filled dielectric, makes capacitor core hold sealing state.

Claims

1. AC high voltage sleeve, two ends insulating coating (2) and middle part coupling sleeve (3) inside that has a ground connection ring flange are provided with capacitor core, and it is characterized in that: the dielectric (5) between the conducting rod of internal capacitance fuse (1) and each layer capacitance pole plate (4) is to be made by tartan.

2. by the described sleeve pipe of claim 1, it is characterized in that the synthetic rubber dielectric (5) between conducting rod (1) and capacitor plate (4) is not to be sulfided into solid-state making by vulcanizing liquid tartan under high temperature or room temperature condition after casting is filled under the state of vacuumizing.