CN204088031U

CN204088031U - High-tension switch cabinet power transformer

Info

Publication number: CN204088031U
Application number: CN201420525909.4U
Authority: CN
Inventors: 张宝忠; 冷联; 姚丽敏
Original assignee: ZHENJIANG DANGAO ELECTRIC CO Ltd
Current assignee: ZHENJIANG DANGAO ELECTRIC CO Ltd
Priority date: 2014-09-15
Filing date: 2014-09-15
Publication date: 2015-01-07
Anticipated expiration: 2024-09-15

Abstract

The utility model discloses a kind of high-tension switch cabinet power transformer, comprises transformer core, primary winding, secondary coil and secondary coil skeleton, and secondary coil is around on twice coil rack; Secondary coil is enclosed within transformer fe in the heart by secondary coil skeleton, coated secondary coil insulating barrier on secondary coil outer peripheral face, primary winding is around outside secondary coil insulating barrier, the coated primary winding of mixture of epoxy resins of transformer shell and secondary coil, transformer core is linked into an integrated entity by vertical anchor ear, and its both sides, lower end are fixedly connected with transformer base.The utility model volume is little, lightweight, voltage withstand class is high, and its withstand voltage can only bear 3kV from existing power supply transformer and bring up to 35kV, can be used for the power transformer of 6kV grade.Transformer shell of the present utility model fundamentally solves existing power transformer primary winding and the bad problem of secondary coil coil humidity resistance.

Description

High-tension switch cabinet power transformer

Technical field

The utility model relates to a kind of power transformer, and especially a kind of power transformer for high-tension switch cabinet, belongs to transformer technology field.

Background technology

The function of power transformer is power transmission, voltage transformation and insulation isolation, is widely used in electric power conveying technology.The high-tension electricity that electrical network inputs directly can be transformed to the 220V alternating current for instrument in high-tension switch cabinet and electrical equipment by the power transformer in high-tension switch cabinet.The power transformer of existing high-tension switch cabinet is withstand voltage, the class of insulation is lower, and primary winding and secondary coil coil are merely through dipping lacquer process, and humidity resistance is bad, has a strong impact on the normal use of power transformer.

Utility model content

The purpose of this utility model is to provide the high-tension switch cabinet power transformer that a kind of volume is little, lightweight, voltage withstand class is high.

The utility model is achieved by the following technical programs:

A kind of high-tension switch cabinet power transformer, comprise transformer core, primary winding, secondary coil and secondary coil skeleton, described secondary coil is around on twice coil rack; Described secondary coil is enclosed within transformer fe in the heart by secondary coil skeleton, coated secondary coil insulating barrier on secondary coil outer peripheral face, primary winding is around outside secondary coil insulating barrier, the coated primary winding of mixture of epoxy resins of transformer shell and secondary coil, transformer core is linked into an integrated entity by vertical anchor ear, and both sides, transformer core lower end are fixedly connected with transformer base.

The purpose of this utility model can also be realized further by following technical measures.

Aforesaid high-tension switch cabinet power transformer, wherein said secondary coil skeleton adopts sheet molding compound to make; Described secondary coil insulating barrier adopts 18 ~ 22 layers of plastic grid coiling to form.

Aforesaid high-tension switch cabinet power transformer, upwards vertically extends the external post of secondary coil one to one on the upside of wherein said transformer shell, primary winding two ends are fixedly connected with the connection cylinder lower end be fixed in the external post upper end of primary winding respectively; Secondary coil two ends are fixedly connected with a pair connecting line the inner respectively, and described a pair connecting line outer end passes transformer shell.

Aforesaid high-tension switch cabinet power transformer, the transformer base that wherein a pair section bar is made clamps both sides, transformer core lower end, and is fixedly connected with integral with transformer core by the securing member being each passed through transformer base two ends.

The utility model volume is little, lightweight, voltage withstand class is high, and its withstand voltage can only bear 3 kV from existing power supply transformer and bring up to 35kV, can be used for the power transformer of 6 kV grades.Transformer shell of the present utility model adopts mixture of epoxy resins by vacuum technique moulding by casting, fundamentally solves existing dipping lacquer process power transformer primary winding and the bad problem of secondary coil coil humidity resistance.

Advantage and disadvantage of the present utility model, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.

Accompanying drawing explanation

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

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

Embodiment

Below in conjunction with the embodiment of accompanying drawing and 6kV/220V power transformer, the utility model is described in further detail.

As depicted in figs. 1 and 2, the present embodiment comprises transformer core 1, primary winding 2, secondary coil 3 and secondary coil skeleton 4, secondary coil 2 is made on twice coil rack 4 around employing sheet molding compound (SMC), secondary coil 2 is enclosed within transformer core 1 by secondary coil skeleton 4, at the coated secondary coil insulating barrier 5 of secondary coil 2 outer peripheral face, secondary coil insulating barrier 5 adopts 18 ~ 22 layers of plastic grid coiling to form, and such structure can reach good insulation effect.Primary winding 2 is around outside secondary coil insulating barrier 5, the coated primary winding 2 of mixture of epoxy resins and the secondary coil 3 of transformer shell 6 is poured into by vacuum technique, the external post 61 of primary winding of a pair taper type is upwards vertically extended on the upside of transformer shell 6, primary winding 2 two ends are fixedly connected with connection cylinder 21 lower end be fixed in primary winding external post 61 upper end respectively, connect cylinder 21 upper end and are connected with power input by trip bolt 22.Secondary coil 3 two ends are fixedly connected with a pair connecting line 31 the inner respectively, and a pair connecting line 31 outer end passes transformer shell 6.

Transformer core 1 is linked into an integrated entity by the vertical anchor ear 7 connected up and down, and vertical anchor ear 7 two ends are fixedly connected with respectively by trip bolt nut group 71.Both sides, transformer core 1 lower end are fixedly connected with transformer base 8.The transformer base 8 of the present embodiment adopts pair of horns steel to make, pair of horns steel clamp lives both sides, transformer core 1 lower end, and be fixedly connected with integral by the tightening bolt nut group 81 being each passed through a pair angle steel two ends with transformer core 1, two ends, angle steel base are respectively equipped with and in high-tension switch cabinet, connecting hole 82 of the present utility model are installed.

In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.

Claims

1. a high-tension switch cabinet power transformer, comprises transformer core, primary winding, secondary coil and secondary coil skeleton, and described secondary coil is around on twice coil rack; It is characterized in that: described secondary coil is enclosed within transformer fe in the heart by secondary coil skeleton, coated secondary coil insulating barrier on secondary coil outer peripheral face, primary winding is around outside secondary coil insulating barrier; The mixture of epoxy resins of coated primary winding and secondary coil is solidified into transformer shell, and transformer core is linked into an integrated entity by vertical anchor ear, and both sides, transformer core lower end are fixedly connected with transformer base.

2. high-tension switch cabinet power transformer as claimed in claim 1, is characterized in that: described secondary coil skeleton adopts sheet molding compound to make.

3. high-tension switch cabinet power transformer as claimed in claim 1, is characterized in that: described secondary coil insulating barrier adopts 18 ~ 22 layers of plastic grid coiling to form.

4. high-tension switch cabinet power transformer as claimed in claim 1, it is characterized in that: upwards vertically extend the external post of secondary coil one to one on the upside of described transformer shell, primary winding two ends are fixedly connected with the connection cylinder lower end be fixed in the external post upper end of primary winding respectively.

5. high-tension switch cabinet power transformer as claimed in claim 1, it is characterized in that: secondary coil two ends are fixedly connected with a pair connecting line the inner respectively, described a pair connecting line outer end passes transformer shell.

6. high-tension switch cabinet power transformer as claimed in claim 1, it is characterized in that: the transformer base that a pair section bar is made clamps both sides, transformer core lower end, and is fixedly connected with integral with transformer core by the securing member being each passed through transformer base two ends.