CN2262280Y

CN2262280Y - Isolation transformer

Info

Publication number: CN2262280Y
Application number: CN 95225913
Authority: CN
Inventors: 戴明星; 蔡泽斌; 高宪法
Original assignee: JIANHU COUNTY ELECTRONIC EQUIPMENT FACTORY JIANGSU PROV
Current assignee: JIANHU COUNTY ELECTRONIC EQUIPMENT FACTORY JIANGSU PROV
Priority date: 1995-12-11
Filing date: 1995-12-11
Publication date: 1997-09-10
Anticipated expiration: 2005-12-11

Abstract

The utility model relates to an isolation transformer. The isolation transformer used in airports at present has the insufficiencies of poor sealing performance on the connection joint of a cable and a casing, low tensile strength of the connection of a cable core and a coil end, and high contact resistance. The utility model comprises an output cable, an input cable, a casing, an insulation layer, a coil winding assembly and an annular iron core, wherein, a cable core and a first and a second coils are connected by the adoption of a compression connection copper pipe and the soldering tin; cable jackets on the connection joints of the cable and the casing are respectively provided with a reverse conical lug boss. Thereby, the utility model can effectively overcome the insufficiencies in the prior art. The utility model can be used for a lighting system of an airport and especially army aviation airports.

Description

Novel isolation transformator

The utility model relates to a kind of isolating transformer.

Isolating transformer (hereinafter to be referred as every becoming) is an equipment indispensable in the airfield light illuminator, and several are connected on mutually in the earth-free high voltage and constant current loop every becoming primary coil, and secondary coil provides safe voltage and constant current to load (bulb).When becoming the bringing onto load operation, be equivalent to power transformer every change, because every becoming elementary being connected in the constant current loop, so in running, arbitrary load (bulb) is opened circuit or short circuit, the airfield light system still can operate as normal.But, that adopts at present is miscellaneous every change, as the patent No. is the low temperature rise isolating transformer of 94241664.3., its input, output cable and every the junction that becomes housing, sealing property is relatively poor, it is bigger that cable core and primary and secondary winding protruding head are connected contact resistance, and easily pulled, and these defectives seriously shortened every the useful life that becomes.

It is a kind of novel every change that the purpose of this utility model is to provide, it can overcome effectively at present and is connected with primary and secondary coil end with housing junction poor sealing performance, cable core every the power transformation cable, the weak point that the tensile strength low contact resistance is high, thus effectively improved every the useful life that becomes.

In order to achieve the above object, technical solution of the present utility model is to set up a back taper boss at cable and on the cable cover(ing) that becomes the housing junction, for realizing such scheme, formation of the present utility model is: it comprises input cable, output cable, housing, insulating barrier, coil windings and ring structure iron core, coil windings is wound on the ring structure iron core, being insulated simultaneously layer again surrounds, housing is again with they sealings, set up a back taper boss on the cable cover(ing) of cable and housing junction, the back taper boss wraps tightly on cable cover(ing), and is sealed in the housing.

The termination of cable core of the present utility model forms by crimping copper pipe and scolding tin with coil end and is electrically connected.

Obviously the utlity model has good seal performance, the characteristics that tensile strength is high.

Below in conjunction with accompanying drawing the utility model is done detailed explanation.

In the accompanying drawing, Fig. 1 is a front view of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is an A-A partial sectional view of the present utility model;

Fig. 4 is a B-B cutaway view of the present utility model;

Fig. 5 is the electrical schematic diagram of airport constant current loop.

As shown in the figure, the utility model comprises output cable [1] (twin-core), input cable [2], housing [4], insulating barrier [10], coil windings [11], ring structure iron core [12], crimping copper pipe [8] and back taper boss [7], coil windings is wound on the ring structure iron core, being insulated simultaneously layer again surrounds, primary coil [13] is connected in the constant current loop, secondary coil [14] is powered to load (bulb), two coil ends [9] of secondary coil respectively with output cable in the termination of two cable cores [5] form firm being electrically connected by crimping copper pipe and scolding tin, two coil ends of primary coil form firm being electrically connected with the cable core termination of two input cables by crimping copper pipe and scolding tin respectively, input, respectively be provided with a back taper boss on the cable cover(ing) of output cable and housing junction [6], the back taper boss is wrapped up in by several layers of epoxy glass fabric that scribbles epoxy resin, with the housing of insulating material cast with ring structure iron core, coil windings, insulating barrier, the termination of cable core, one end of cable cover(ing) and wrap tightly superincumbent back taper boss and be enclosed in admittedly together, input, output cable is drawn from the upper surface of housing, is provided with three boss [3] on the upper surface accordingly.

The foregoing description has following advantage:

1, cable picks out from end face, compact conformation;

2, the termination of cable core is connected the tensile strength height with coil end, and contact resistance is low;

3, cable and housing junction good seal performance;

4, good waterproof performance, field or reliability service in the open under water.

The utility model is specially adapted in the lighting system of army plane field.

Claims

1, a kind of novel isolation transformator, it comprises input cable [2], output cable [1], housing [4], insulating barrier [11], ring structure iron core [12] and the termination of stube cable heart yearn [5] and the crimping copper pipe [8] of coil end [9], coil windings is wound on the ring structure iron core, being insulated simultaneously layer again surrounds, housing is again with they sealings, it is characterized in that setting up a back taper boss [7] on the cable cover(ing) [6] of cable and housing junction, the back taper boss wraps tightly on cable cover(ing), and is sealed in the housing.

2, isolating transformer according to claim 1 is characterized in that the termination and the coil end [9] of cable core [5], forms by crimping copper pipe [8] and scolding tin to be electrically connected.

3, transformer according to claim 1 and 2 is characterized in that output, input cable [1,2] draw from the upper surface of housing, and the housing upper surface is provided with three boss [3] accordingly.