CN2162700Y

CN2162700Y - No-leakage lead wine ceramic cover

Info

Publication number: CN2162700Y
Application number: CN 93216008
Authority: CN
Inventors: 张蒙
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-11
Filing date: 1993-06-11
Publication date: 1994-04-20
Anticipated expiration: 2003-06-11

Abstract

The utility model relates to a no-leakage ceramic cover of lead wires, which belongs to ceramic covers of lead wires of a power transformer or a power capacitor. The utility model is characterized in that active metal titanium is melted in a vacuum state by high temperature and is infiltrated into the surface of the combining part of a ceramic cover pipe, a metallic flange and an end cap to form a compact metallic layer; simultaneously, the argentiferous lead cored solder enables the ceramic cover pipe, the metallic flange, the end cap and the active metal titanium to be sintered into a whole in one time. When the utility model is installed, the metallic flange is directly welded with a casing. The utility model fundamentally solves the problem of the leakage of the ceramic cover of lead wires and effectively ensures the safe operation.

Description

No-leakage lead wine ceramic cover

The utility model belongs to the lead-out wire insulator of power transformer and power capacitor.

Filled with the insulation cold oil in the housing of power transformer, filled with electrolyte in the power capacitor housing, the lead-out wire insulator has all been arranged on the housing of the two.Existing power transformer lead-out wire insulator is to make with surperficial undressed pottery, when connecting with housing, seals with rubber seal, is compressed by the screw pressing plate.Because rubber seal can wear out and the poor reliability of mechanical compaction, and the seepage phenomenon often takes place, cause the destruction of insulator insulation property and cause the power transmission and transformation accident.On power capacitor, existing lead-out wire insulator be with silver oxide under the flame of reducibility gas, the surface reduction in insulator sealing-in position is an argent, metal-ware is gone up in welding again.Because silver oxide in reduction process, with pottery chemical action does not take place, therefore on mating surface, still there are pore and gap to exist, can't avoid poisonous pollutes with leaking out of electrolyte stink, and the processing technology complexity, qualification rate is low, and it is many to consume silver.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of lead-out wire insulator of ne-leakage is provided.

Above-mentioned purpose is achieved through the following technical solutions.

With pottery being had affinity interaction, can forming the reactive metal titanium of covalent bond with ceramic molecule, high-temperature fusion under vacuum state, make it to be penetrated in the hole of porcelain bushing sealed portion site surface, form the very fine and close titanium coating of one deck, use the argentalium braze to become an integral body with porcelain bushing and metal flange, end cap are once sintered simultaneously.During installation, the metal flange on the utility model is soldered directly on the metal shell of transformer or capacitor and gets final product.Because Titanium molecule and ceramic molecular energy form covalent bond, so the utility model has guaranteed the sealing of pottery with the metal solder junction effectively, and because plumbous pliability is big, can avoid because of the different weld crackings that make of pottery, thereby can bear long-term variation of ambient temperature and the circulation of high low temperature with the thermal coefficient of expansion of metal.

Below in conjunction with embodiment the utility model is further described.

Fig. 1 is the utility model sectional arrangement drawing.Wherein: 1-porcelain bushing, 2-flange, 3-end cap, 4-titanium coating.

As shown in the figure, porcelain bushing (1) two end is welded with two metal-wares respectively: flange (2) and end cap (3), go up and flange (2) at porcelain bushing (1), it is the thick titanium coating of one deck 0.04mm (4) that end cap (3) combines on the surface at position, it is to use the bonding agent coated in porcelain bushing (1) surface titanium valve, under vacuum state, heat to 850～900 ℃, make it fusion infiltration and form attain close metal level, meanwhile, use the argentalium braze together again, integral body of once sintered one-tenth with the metal level (4) of this porcelain bushing and flange (2) and end cap (3) soldering.

The utility model has fundamentally solved the leakage problems of lead-out wire insulator, and production technology is simple simultaneously, saves silver in a large number, and very high economic benefit and social benefit are arranged, and is suitable for large-scale popularization utilization in power industry.

Claims

1, a kind of ne-leakage lead-out wire insulator, mainly constitute by porcelain bushing, metal flange and metal end caps, it is characterized in that on the porcelain bushing combining with flange, end cap on the surface at position is the densified metal layer that one deck is formed by the infiltration of reactive metal titanium, and porcelain bushing becomes an integral body by this titanium coating with flange, end cap soldering.

2,, it is characterized in that welding employing reactive metal titanium and pricker comsol according to the described lead-out wire insulator of claim 1.