CN2605652Y

CN2605652Y - Integral-pouring transformer copper bar terminal

Info

Publication number: CN2605652Y
Application number: CN 03220157
Authority: CN
Inventors: 孙月红
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-28
Filing date: 2003-02-28
Publication date: 2004-03-03
Anticipated expiration: 2013-02-28

Abstract

The utility model relates to a structure of integral cast-resin type transformer copper bar terminals which is used as outlet terminals for twice high currents of a furnace transformer and a rectifier transformer, belonging to the technical field of basic electrical elements. In the utility model 10-30 copper bar terminals are cast on an insulating board to be connected into an integral body. The utility model is structurally simple, compact and reasonable. A plurality of copper bar terminals are cast into a whole, thereby the cast resin has a similar expansion coefficient with the copper bar, ensuring that the resin board can not be cracked due to temperature changes or electromotive power, and then oil leakage is completely avoided; meanwhile the operational reliability of the transformer is improved and a great amount of the precious metal (copper) is saved.

Description

Integrated casting type transformer copper bar terminal

Technical field:

The utility model relates to a kind of integrated casting type transformer copper bar terminal, is the secondary large current outlet terminal of furnace transformer, rectifier transformer, belongs to basic electronic component technology field.

Background technology:

Furnace transformer, rectifier transformer are transformers important in the national economy, account for the 3-4% of transformer total output every year, and its common feature is a single transformer power height.Secondary voltage is low to be reached about 100-1000V, and output current is up to tens thousand of and even tens of Wan An, and the structure of outlet copper bar terminal is very important.Before the utility model is made, in prior art, copper bar is to connect winding protruding head and the outside electric conductor of current circuit greatly, transformer oil leaks out to air side in the case in order to avoid, on copper bar, be welded with copper bar seat and screw rod, and oil-resistant rubber insert is housed in the above, after fastening, reach the purpose that outlet terminal seals.The transformer copper bar terminal is several at least, and dozens of at most forms a line or is installed in jointly distichously on the insulation board, and every shared insulation board of transformer three-phase or phase-splitting are drawn secondary current with one or two insulation boards separately.And each copper bar terminal all exists copper bar and the welding of copper bar seat, copper bar seat and screw rod welding, and these welding have increased workload greatly, also exists because of moving the seepage that electric power or congenital manufacturing defect cause, and has increased operation expense.

Technology contents:

The purpose of this utility model is to overcome above-mentioned weak point, thereby provides a kind of simple, compact and reasonable for structure; With common being cast in together of several copper bar terminals, casting resin and copper bar have the close coefficient of expansion, guarantee not to make resin cracks because of variation of temperature and electric power, can thoroughly stop the integrated casting type transformer copper bar terminal of seepage oil.

Main solution of the present utility model is achieved in that

It mainly adopts copper bar 1 to be cast on the insulation board 3, and it is connected as a single entity.

Compared with the prior art the utility model has the following advantages:

The utility model is simple, compact and reasonable for structure; Owing to adopt several copper bar terminals to be cast for an integral body jointly, thereby make casting resin and copper bar that the close coefficient of expansion be arranged, guaranteed not resin plate to be ftractureed because of variation of temperature and electric power, thoroughly stopped seepage oil; Can improve the power transformer product reliability of operation, save a lot of precious metals.

Description of drawings:

Fig. 1 is the utility model structural representation;

Embodiment:

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

The utility model adopts copper bar 1 to be cast on the insulation board 3 by resin 2, makes its one-tenth as a whole.Copper bar 1 adopts 10-30 mould material to can be filler (as quartz sand or glass fibre etc.) or do not have two kinds of fillers, but will guarantee that resin and copper bar have close thermal coefficient of expansion.It is enough that resin-cast plate intensity is wanted, and thickness should be more than 120mm.The part that copper bar 1 contacts with resin should be carried out coarse processing in advance, to increase the affinity of copper bar and resin.At the empty part branch of copper bar, should be coated with epoxy resin in the 100mm at least at resin surface, adhere to prevent dust.

Claims

1, a kind of integrated casting type transformer copper bar terminal comprises copper bar (1), it is characterized in that adopting copper bar (1) to be cast on the insulation board (3), and it is connected as a single entity.

2, integrated casting type transformer copper bar terminal according to claim 1 is characterized in that described copper bar (1) adopts 10-30.