CN201117410Y

CN201117410Y - Amorphous alloy oil immersion type distributing transformer aluminum foil coil and transformer body structure

Info

Publication number: CN201117410Y
Application number: CNU2007200761775U
Authority: CN
Inventors: 陈华山; 凌健; 顾伟; 陈黎泉
Original assignee: SHANGHAI LIANNENG ZHIXIN AMORPHOUS ALLOY TRANSFORMER CO Ltd; SHANGHAI ZHIXIN AMORPHOUS ALLOY TRANSFORMER CO Ltd; Shanghai Zhixin Electric Amorphous Co Ltd; Shanghai Zhixin Electric Co Ltd
Current assignee: SHANGHAI LIANNENG ZHIXIN AMORPHOUS ALLOY TRANSFORMER CO Ltd; SHANGHAI ZHIXIN AMORPHOUS ALLOY TRANSFORMER CO Ltd; Shanghai Zhixin Electric Amorphous Co Ltd; Shanghai Zhixin Electric Co Ltd
Priority date: 2007-11-14
Filing date: 2007-11-14
Publication date: 2008-09-17
Anticipated expiration: 2017-11-14

Abstract

The utility model discloses an aluminum foil coil and an active part of an amorphous alloy oil soaked distribution transformer, which includes four frames of five-column or three frames of three-column amorphous alloy iron cores, a high-voltage and a low-voltage coils arranged on an iron beam, upper and lower clamps arranged on the upper and the lower ends of the high-voltage and low-voltage coils, end clamp parts on the outer ends of the high-voltage coil of two side columns, an insulating framework arranged on the iron beam and a plurality of aluminum-copper transition connectors fixed on the upper clamp parts by wire clamps; the low-voltage coil is made of aluminum foil and is directly wound on the insulating framework; the head and the tail ends of the low-voltage coil are respectively welded with transition connector aluminum bars; the outer surface of the low-voltage coil is also wrapped with major insulation; the high-voltage coil is wound on the outer surface of the major insulation. The technical proposal of the utility model is that the copper is replaced by aluminum, and the aluminum foil coil and the active part of the amorphous alloy dry-type transformer not only is characterized by low no-load loss of a general amorphous alloy distribution transformer, but also has the advantages of low material cost, light weight, reduction of impact of the rising copper price on the cost of the amorphous alloy distribution transformer, reduction of consumption of copper resource in shortage, etc.

Description

Aluminum foil coil and transformer body structure of amorphous alloy oil-immersed distribution transformer

Technical Field

The utility model relates to a coil and ware body structure of transformer especially relates to aluminum foil coil and ware body structure of metallic glass oil-immersed distribution transformer.

Background

The body of the transformer consists of two parts, namely a coil and an iron core, and copper is a main raw material for manufacturing the transformer coil. China has a very short supply of copper materials, and can meet the requirements only by relying on import for a long time. In recent years, international copper prices have risen, which has led to a substantial increase in the material costs of transformers.

The amorphous alloy oil-immersed distribution transformer (amorphous distribution transformer) is a widely used high-efficiency energy-saving product with extremely low no-load loss. The continuous increase of copper value influences the cost performance of the amorphous distribution transformer and also restricts the popularization and application of the amorphous distribution transformer to a certain extent.

Aluminum is an excellent conductor with conductivity second to copper, and the mass density of aluminum is less than one third of that of copper. The aluminum ore resources in China are quite rich and do not need to be imported.

The low-voltage coil of the existing domestic amorphous distribution transformer is almost made of copper foil or copper wire. If the aluminum foil is used to replace copper foil or copper wire to make low-voltage coil, the material cost can be reduced by about 10% on the premise of the same product performance. Therefore, the cost performance of the amorphous distribution transformer can be optimized, the influence of the rising of copper price on the cost of the amorphous distribution transformer can be reduced, and the consumption of copper resources in short supply of China is reduced.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide one kind and can reduce its no-load loss and no-load current by a wide margin, gain fine energy-conserving effect and have lower material cost's metallic glass oil-immersed distribution transformer's ware body structure.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides an aluminum foil coil and ware body structure of oily formula distribution transformer of metallic glass, includes that three-phase metallic glass iron core, suit are at the high-low voltage coil on the core leg, establish the folder on high-low voltage coil upper end, still include that the insulating skeleton of suit on the core leg and a plurality of aluminium copper crossover sub of fixing on last folder through insulating wire clamp, the conducting material of low voltage coil is aluminium foil and direct coiling on insulating skeleton, the head, the end of low voltage coil respectively with aluminium copper crossover sub fixed connection, it has main insulation still to wrap up on the surface of low voltage coil, the high voltage coil coiling is on main insulating surface.

In the aluminum foil coil and transformer body structure of the amorphous alloy oil-immersed distribution transformer, the insulating framework is a rectangular cylinder matched with the section of the iron core column.

The aluminum foil coil and the transformer body structure of the amorphous alloy oil-immersed distribution transformer are characterized in that the aluminum-copper transition joints are two and six per phase and are arranged in the same axial direction with the high-voltage coil and the low-voltage coil, each aluminum-copper transition joint is composed of a copper bar and an aluminum bar which are welded into a whole, and the head end and the tail end of the low-voltage coil are respectively welded with the aluminum bars of the aluminum-copper transition joints.

In the aluminum foil coil and transformer body structure of the amorphous alloy oil-immersed distribution transformer, the insulated conductor clamp is positioned between the copper bar on the upper part of the aluminum-copper transition joint and the upper clamp piece.

The utility model discloses an aluminum foil coil and ware body structure's of metallic glass oil-immersed distribution transformer technical scheme is with aluminium to replace copper, and it not only has the low no-load loss's of general metallic glass distribution transformer characteristic, and it is low still to have a material cost, and light in weight reduces copper price rising to metallic glass distribution transformer cost's influence, reduces advantages such as the copper resource consumption of scarce. The device body has a solid, compact and reasonable structure, the winding has high mechanical strength and can bear the impact of short-circuit current, and simultaneously, due to the protection effect of the insulating framework, the influence of the coil generated by the electrodynamic force of the short-circuit current on extruding the amorphous alloy iron core can be eliminated so as to ensure that the iron core has constant and good magnetic performance.

Drawings

Fig. 1 is a schematic diagram of the structure of an aluminum foil coil and a transformer body of the amorphous alloy oil-immersed distribution transformer of the present invention;

fig. 2 is a schematic structural diagram of an aluminum foil coil and an aluminum copper transition joint in a body structure of the amorphous alloy oil-immersed distribution transformer of the present invention;

fig. 3 is a sectional view taken along line a-a in fig. 2.

Detailed Description

Referring to fig. 1, the aluminum foil coil and transformer body structure of the amorphous alloy oil immersed distribution transformer of the present invention includes a three-phase amorphous alloy core 7, high and

low voltage coils

4 and 5, an upper clamp 6, a lower clamp 6, an end clamp (not shown), an insulating frame 3, and a conducting bar composed of a plurality of aluminum-copper transition joints 1. Wherein,

the amorphous alloy iron core 7 is of a four-frame five-column type or three-frame three-column type structure with a rectangular cross section, and the iron core 7 can be composed of one row or two rows of amorphous alloy iron cores 7 stacked in parallel; the high-

low voltage coils

4 and 5 are sleeved on the iron core column.

The upper and lower clamping pieces 6 are respectively arranged at the upper and lower ends of the high and

low voltage coils

4 and 5; the end clamping pieces are arranged at the outer ends of the two side column high-voltage coils 5.

The insulating framework 3 is a rectangular cylinder with the inner diameter matched with the section of the core limb and is sleeved on the core limb.

The conductive material of the low-voltage coil 4 is aluminum foil, the width of the aluminum foil can be calculated according to the reactance value of the aluminum foil, and the aluminum foil is directly wound on the insulating framework 3; the outer surface of the low voltage coil 4 is also covered with a main insulation (not shown).

The high voltage coil 5 is made of copper wire and is wound on the outer surface of the main insulation, so that the high and

low voltage coils

4 and 5 form an integral rectangular coil.

Referring to fig. 2 and 3, six al-cu transition joints 1 are arranged in a row coaxially with the high and

low voltage coils

4, 5 and are fixed to an upper clamp 6 by an insulated wire clamp 2. Each aluminum-copper transition joint 1 is welded into a whole by a copper bar 12 and an aluminum bar 11, and the insulated wire clamp 2 is positioned between the copper bar 12 on the upper part of the transition joint 1 and the upper clamp 6.

The head and the tail end of the low-voltage coil 4 are respectively connected with an aluminum bar 11 of the aluminum-copper transition joint 1 in a welding mode, and a copper bar 12 of the aluminum-copper transition joint 1 is led out to the outside of the coil along the axial direction of the high-voltage and low-

voltage coils

4 and 5.

The utility model discloses an aluminum foil coil and ware body structure's of metallic glass oil-immersed distribution transformer technical scheme is with aluminium to replace copper, and it not only has the low no-load loss's of general metallic glass distribution transformer characteristic, and it is low still to have a material cost, and light in weight reduces copper price rising to metallic glass distribution transformer cost's influence, reduces advantages such as the copper resource consumption of scarce.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. The utility model provides an aluminum foil coil and ware body structure of metallic glass oil-immersed distribution transformer, includes that three-phase metallic glass iron core, suit are at the high-low voltage coil on the core limb, establish the folder on high-low voltage coil upper end, its characterized in that still includes the insulating skeleton of suit on the core limb and a plurality of aluminium copper transition joint of fixing on last folder through insulating wire clamp, the conducting material of low voltage coil is aluminium foil and direct coiling on insulating skeleton, the head of low voltage coil, end respectively with aluminium copper transition joint fixed connection, it has main insulation still to wrap up on the surface of low voltage coil, the high voltage coil coiling is on main insulating surface.

2. The aluminum foil coil and body structure of the amorphous alloy oil-filled distribution transformer according to claim 1, wherein the insulating framework is a rectangular cylinder matched with the cross section of the core column.

3. The aluminum foil coil and body structure of an amorphous alloy oil-filled distribution transformer according to claim 1, wherein the aluminum-copper transition joints are two and six per phase and are arranged in a coaxial manner with the high-voltage and low-voltage coils, each aluminum-copper transition joint is composed of a copper bar and an aluminum bar which are welded into a whole, and the head end and the tail end of the low-voltage coil are respectively welded with the aluminum bars of the aluminum-copper transition joints.

4. The aluminum foil coil and body structure of an amorphous alloy oil-filled distribution transformer according to claim 3, wherein the insulated conductor clamp is located between the copper bar and the upper clamp at the upper part of the aluminum-copper transition joint.