CN201222412Y

CN201222412Y - Copper bar for dry transformer foil coil

Info

Publication number: CN201222412Y
Application number: CNU2008200499791U
Authority: CN
Inventors: 刘贤龙; 刘贤文; 刘贤群; 宋范; 俞安; 苏红元
Original assignee: GUANGZHOU GUANGGAO HIGH VOLTAGE ELECTRIC APPARATUS CO Ltd
Current assignee: GUANGZHOU GUANGGAO HIGH VOLTAGE ELECTRIC APPARATUS CO Ltd
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-04-15
Anticipated expiration: 2018-06-30

Abstract

The utility model discloses a copper bar of a foil wound coil of a dry-type transformer, which comprises a foil wound segment, a bending segment and a lead-out end which are connected into one body in turn, wherein the foil wound segment is provided with a 'V'-shaped gradient segment along the length direction, namely along the height of the coil wound coil from bottom to top, and the cross section of the coil foil wound segment is gradually increased in the regular of line growth in unit according to the size of carrying current of the foil wound coil. A copper bar which is manufactured according to the utility model can save copper products, greatly lowers production cost, leads the appearance of the foil wound coil of a transformer to be more in accordance with designing a round effect, and has more reliable power frequency property and lightning impulse security.

Description

A kind of copper bar of array of dry transformer foil coil

Technical field

The utility model relates to the dry-type transformer equipment part, specifically is meant a kind of copper bar of array of dry transformer foil coil.

Background technology

To energy-saving and cost-reducing requirement, each transformer producer all makes unremitting effort at, nodal wood type transformer energy-conservation for exploitation according to country.Especially the near section time, how the copper resource scarcity is saved the transformer making and is seemed especially urgent with copper material.As shown in Figure 1, 2, the copper conductor of existing array of dry transformer foil coil is whole a Copper Foil 1, the height and the coil height of Copper Foil 1 are suitable, Copper Foil is wound into cylindric sandwich construction, be wound with insulating barrier between each layer Copper Foil simultaneously, and be arranged at intervals with dielectric support block 3 every the several layers Copper Foil, form gas channel 4 at interval, so that heat radiation at Copper Foil; Described inner copper line 2-1 (its shape is shown in Fig. 3,4) is welded on the head end of the Copper Foil 1 initiating terminal inboard of paper tinsel coiling as coil, outer copper line 2-2 (its shape is shown in Fig. 5,6) is welded on the end of Copper Foil 1 end of paper tinsel coiling as coil, and two copper bar 2-1,2-2 position are all in the same side of coil; Shortcoming be copper bar 2 shared locational spaces to cause whole winding greatly be not circular, make copper bar 2 shorten distance with the high pressure exterior loop, cause 2 pairs of high pressure exterior loop discharges of copper bar easily, thereby have influence on the safe operation of transformer.

The utility model content

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of copper bar of array of dry transformer foil coil is provided, it can save copper material, reduce production costs greatly, and making transformer foil coiling profile more meet design circle effect, power frequency performance and lightning impulse security performance are more reliable.

The purpose of this utility model realizes by following proposal: the copper bar of this array of dry transformer foil coil, comprise that the paper tinsel that connects as one successively is around section, bending section, exit, wherein, described paper tinsel is provided with the gradient section that is " ∠ " shape along its length around section, promptly along paper tinsel coiling height direction from the bottom to top, described coil paper tinsel is the rule that the unit straight line increases around the sectional area of section according to paper tinsel coiling current-carrying size and increases progressively.

For realizing the utility model better, the length dimension of the gradient section of described " ∠ " shape and the angle of gradient section hypotenuse and straight flange are determined according to the standard-required of paper tinsel coiling Copper Foil current-carrying size and current carrying density.

The principle of making the copper bar of described array of dry transformer foil coil is: according to the standard-required of paper tinsel coiling Copper Foil current-carrying size and current carrying density, determine the length dimension of lead-in wire copper bar gradient section and the angle of gradient section hypotenuse and straight flange, make along paper tinsel coiling height direction from the bottom to top, described coil paper tinsel increases progressively according to the rule that paper tinsel coiling current-carrying size is unit straight line growth around the sectional area of section, thereby the shear line of determining the copper bar flitch is arranged rationally to open material; The copper bar flitch is sheared by described shear line, obtained the inside and outside copper bar of this array of dry transformer foil coil.Like this, just, can save short equirotal equivalent copper bar with the gradient segment length.

Compared with prior art, the utlity model has following advantage and beneficial effect: easy to make, simple in structure, can obviously save copper material, reduce production costs greatly, simultaneously, the array of dry transformer foil coil of making according to the utility model also more meets the circular requirement of design, the distribution electric field is more even, and power frequency performance and lightning impulse security performance are more reliable.

Description of drawings

Fig. 1 is vertical sectional structure schematic diagram of existing array of dry transformer foil coil;

Fig. 2 is the plan structure schematic diagram of array of dry transformer foil coil shown in Figure 1;

Fig. 3 is an inner copper line front view shown in Fig. 1,2;

Fig. 4 is an inner copper line vertical view shown in Fig. 1,2;

Fig. 5 is an outer copper line front view shown in Fig. 1,2;

Fig. 6 is a vertical view shown in Fig. 1,2;

Fig. 7 is that the utility model array of dry transformer foil coil copper bar is sheared the schematic diagram that is made as inside and outside copper bar simultaneously;

Fig. 8 is that paper tinsel coiling current-carrying gradient is resolved schematic diagram.

Embodiment

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.

Embodiment

Shown in Fig. 3-6, the copper bar of this array of dry transformer foil coil (inside and outside copper bar 2-1,2-2) comprises that respectively the paper tinsel that connects as one successively is around section, bending section, exit.

Be illustrated in figure 8 as paper tinsel coiling current-carrying gradient analysis diagram, size according to actual Copper Foil current-carrying, determine the length dimension of gradient section of inside and outside copper bar 2-1,2-2 of this array of dry transformer foil coil and the angle of gradient section hypotenuse and straight flange, thereby the shear line 5 (as shown in Figure 7) of determining copper bar is arranged rationally to open material.

As shown in Figure 7, can shear out inside and outside copper bar 2-1, the 2-2 of this array of dry transformer foil coil along shear line 5 simultaneously, thereby saved short equirotal equivalent copper bar with the gradient segment length, make the paper tinsel of inside and outside copper bar 2-1,2-2 be provided with the gradient section that is " ∠ " shape along its length around section, promptly along paper tinsel coiling height direction from the bottom to top, described coil paper tinsel is the rule that the unit straight line increases around the sectional area of section according to paper tinsel coiling current-carrying size and increases progressively.

As mentioned above, just can realize the utility model preferably, the foregoing description is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.

Claims

1, a kind of copper bar of array of dry transformer foil coil, comprise that the paper tinsel that connects as one successively is around section, bending section, exit, it is characterized in that: described paper tinsel is provided with the gradient section that is " ∠ " shape along its length around section, promptly along paper tinsel coiling height direction from the bottom to top, described coil paper tinsel is the rule that the unit straight line increases around the sectional area of section according to paper tinsel coiling current-carrying size and increases progressively.

2, according to the copper bar of the described a kind of array of dry transformer foil coil of claim 1, it is characterized in that: the length dimension of the gradient section of described " ∠ " shape and the angle of gradient section hypotenuse and straight flange, determine according to the standard-required of paper tinsel coiling Copper Foil current-carrying size and current carrying density.