Parallel outgoing line structure of transformer winding

Abstract

The utility model relates to a transformer winding parallel outgoing line structure which comprises a first core column, a second core column, a borrowing lead and a cold pressing sleeve, and a winding outgoing head lead A on the outermost side of the first core column and a winding outgoing head lead B on the outermost side of the second core column are both led out from the sides, close to the sleeve, of the core columns. A borrowing lead is wound on a non-full-turn area of the end portion of the winding on the outermost layer of the first core column, the lead head end and the lead tail end of the borrowing lead are led out from the position between the two adjacent supporting strips on the corresponding sides, and the lead head end and a winding outgoing lead A are connected with a main lead. And the tail end of the lead wire is connected with the winding head lead wire B through a cold pressing sleeve. Parallel wire outgoing of the two windings is achieved through the borrowing leads, the structure is further simplified, meanwhile, the width and the height of a transformer oil tank are not affected, and connection is convenient and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of transformer, specifically a transformer winding parallel outgoing line structure. BACKGROUND

[0002] The former transformer two columns or three columns outermost winding head lead adopts direct outgoing wire, but along with voltage grade and capacity increase, oil tank space increases, this leads to transportation width exceeding transformer transportation size outer limit requirement. In prior art, winding end part passes through electrostatic plate to increase height, step groove is given to electrostatic plate side close to winding and leaves out lead borrowing space, but electrostatic plate height increase reduces electrostatic plate to core upper yoke insulation distance, and in order to meet insulation size, this needs to increase core window height to meet insulation distance requirement, further increases oil tank height, core weight and cost, and along with voltage grade and capacity increase, this more easily leads to transportation height exceeding transformer operation size outer limit requirement.

[0003] CN201562549U, CN201262883Y and other patents all disclose the realization winding parallel outgoing line by utilizing voltage equalizing ball and uniform tube structure, but voltage equalizing ball has certain height, this cannot meet transformer operation size outer limit requirement.

[0004] CN205452001U patent discloses a 500kV parallel column interconnecting lead and outgoing line structure, which is provided with connecting wire gauge on the second column high voltage coil, and one of the connecting wire gauge heads is connected with a lead, the coil head of the first column high voltage coil is connected with another lead, then the two leads are connected through cold pressure connecting pipe, and the coil head of the first column high voltage coil and the head of one of the connecting wire gauges are provided with outgoing line angle ring. But the above structure is relatively complex, and its structure needs to be further simplified. UTILITY MODEL CONTENTS

[0005] The utility model discloses a transformer winding parallel outgoing line structure, which realizes the parallel outgoing line of two windings through the borrowing lead, and has the advantages of further simplified structure, no influence on the width and height of the transformer oil tank, and convenient and reliable connection.

[0006] The utility model discloses a transformer winding parallel outgoing line structure, which realizes the parallel outgoing line of two windings through the borrowing lead, and has the advantages of further simplified structure, no influence on the width and height of the transformer oil tank, and convenient and reliable connection.

[0007] A kind of transformer winding parallel out line structure, including first heart column, second heart column, borrow position lead and cold pressure sleeve, wherein the winding head lead A of first heart column outermost and the winding head lead B of second heart column outermost are led by heart column close to sleeve side, borrow position lead is wound in the not full turn area of the outermost winding end of first heart column, and the lead head and lead tail of the borrow position lead are led by the adjacent two struts of corresponding side respectively, wherein the lead head and the winding head lead A are connected with total lead, and the lead tail and the winding head lead B are connected by cold pressure sleeve.

[0008] The head of lead tail and the head of winding head lead B are flat plug, the inside of cold pressure sleeve is equipped with support frame, and the flat plug of two side leads are inserted into the support frame and are contacted and fixed, then the cold pressure sleeve is fixed together with the flat plug of two sides and is wrapped with insulating shielding layer.

[0009] The borrow position lead is wound in the not full turn area of the first pie or second pie of the outermost winding of first heart column.

[0010] The advantages and positive effects of the utility model are:

[0011] 1, the utility model discloses a borrow position lead to realize the parallel out line of the winding head lead A of first heart column outermost and the winding head lead of second heart column outermost, and the utility model compared with prior art (such as CN205452001U patent) has eliminated angle ring and extra lead, and the structure is further simplified, and the borrow position lead is wound in the not full turn area of the upper end of first heart column, and there is no influence to transformer oil tank width and height.

[0012] 2, the utility model utilizes the flat plug of the head of lead tail and winding head lead B and inserts into the support frame in the cold pressure sleeve, and is contacted and fixed, then the cold pressure sleeve is bound together with the flat plug of two sides and is wrapped with insulating shielding layer, and the connection is convenient and reliable. ACCURACY OF DRAWINGS

[0013] Figure 1 It is the structural schematic diagram of the utility model,

[0014] Figure 2 It is Figure 1 the radial view of A in,

[0015] Figure 3 It is Figure 1 the radial view of B in,

[0016] Figure 4 It is Figure 1 the radial view of C in,

[0017] Figure 5 It isFigure 1 Enlarged schematic view of the cold-pressing sleeve,

[0018] Figure 6 For Figure 5 Sectional view of the cold-pressing sleeve 4,

[0019] Figure 7 For the schematic view of the parallel out-line structure of the transformer winding in the prior art,

[0020] Figure 8 For the side view of the static plate in the prior art,

[0021] Figure 9 For the side view of the out-line leading wire in the prior art.

[0022] Wherein, 1 is the first heart column, 101 is the winding out-head wire A, 2 is the second heart column, 201 is the winding out-head wire B, 3 is the out-line leading wire, 301 is the leading wire head end, 302 is the leading wire tail end, 4 is the cold-pressing sleeve, 401 is the support frame, 402 is the insulation shielding layer, and 5 is the total leading wire. DETAILED DESCRIPTION

[0023] The utility model will be further described in detail below in combination with the drawings.

[0024] As Figures 1-9 shown, the utility model includes the first heart column 1, the second heart column 2, the out-line leading wire 3 and the cold-pressing sleeve 4, wherein, as Figure 2 shown, the winding out-head wire A 101 of the outermost side of the first heart column 1 and the winding out-head wire B 201 of the outermost side of the second heart column 2 are led out from the side of the heart column close to the sleeve, as Figures 2-3 and Figure 9 shown, the out-line leading wire 3 is wound in the not full-turn area of the first pie or the second pie of the outermost winding of the first heart column 1, and the leading wire head end 301 and the leading wire tail end 302 of the out-line leading wire 3 are led out between the adjacent two struts of the corresponding side respectively, wherein the leading wire head end 301 and the winding out-head wire A 101 are connected with the total leading wire 5, the total leading wire 5 is led out from the tank wall or the tank cover and connected to the tail of the sleeve, and the leading wire tail end 302 and the winding out-head wire B 201 are connected through the cold-pressing sleeve 4. Compared with the prior art (such as CN205452001U patent), the structure of the utility model is further simplified, wherein the both ends of the out-line leading wire 3 are limited through the struts, without additional angle ring structure, and the out-line leading wire 3 is directly connected with the winding out-head wire B 201, without additional leading wire structure, in addition, as Figure 9 shown, it does not have to be like Figure 8The prior art shown needs to borrow through the electrostatic plate, and the utility model does not increase the radial width of the winding and the axial height of the winding, and therefore has no influence on the width and height of the transformer oil tank.

[0025] As Figures 5-6 shown, in the embodiment, the tail end 302 of the lead wire and the head end of the winding head lead wire B201 are both flat plug, the inside of the cold-pressing sleeve 4 is provided with a support frame 401, and the flat plug of the two side lead wires is inserted into the support frame 401 to contact and fix, then the cold-pressing sleeve 4 is wrapped with an insulating shielding layer 402 together with the flat plug on both sides to further fix, and the connection is convenient.

[0026] The working principle of the utility model is:

[0027] As Figure 7 shown, the outermost winding head lead wire of the two-column or three-column transformer in the prior art is directly led out as the total lead wire 5, but with the increase of voltage grade and capacity, the oil tank space is increased, which leads to that the transportation width exceeds the limit requirement of the transformer transportation size, and as Figure 8 shown, the prior art also uses the method that the winding end part passes through the electrostatic plate to increase the height, a stepped groove is opened on the side of the electrostatic plate close to the winding, and a lead wire borrowing space is left, but the structure is more likely to cause that the transportation height exceeds the limit requirement of the transformer operation size.

[0028] As Figure 1 shown, the utility model realizes that the winding head lead wire A101 of the outermost side of the first core column 1 is connected in parallel with the winding head lead wire B201 of the outermost side of the second core column 2 through a borrowing lead wire 3, and compared with the prior art, the structure of the utility model is further simplified, and as Figure 9 shown, the borrowing lead wire 3 is wound in the non-full-turn area of the end part of the first core column 1, and the radial width of the winding and the axial height of the winding are not increased, and therefore the width and height of the transformer oil tank are not influenced.

[0029] The utility model utilizes that the flat plug of the tail end 302 of the lead wire and the head end of the winding head lead wire B201 is inserted into the support frame 401 in the cold-pressing sleeve 4 to contact and fix, then the cold-pressing sleeve 4 is wrapped with an insulating shielding layer 402 together with the flat plug on both sides, and the connection is convenient and reliable.

Claims

1. A transformer winding parallel tapping structure, characterized by: The application relates to a winding wire, which comprises a first limb (1), a second limb (2), a borrowed position lead wire (3) and a cold-pressing sleeve (4), wherein the winding wire A (101) at the outermost side of the first limb (1) and the winding wire B (201) at the outermost side of the second limb (2) are led out from the side of the limbs close to the sleeve, the borrowed position lead wire (3) is wound on the non-full-turn area at the end of the outermost winding of the first limb (1), and the lead wire head end (301) and the lead wire tail end (302) of the borrowed position lead wire (3) are led out between the two adjacent struts on the corresponding side, wherein the lead wire head end (301) and the winding wire A (101) are connected with a total lead wire (5), and the lead wire tail end (302) and the winding wire B (201) are connected through the cold-pressing sleeve (4).

2. The transformer winding parallel tapping structure according to claim 1, characterized in that: The head end of the lead wire tail end (302) and the head end of the winding wire B (201) are both flat plugs, the cold-pressing sleeve (4) is internally provided with a support frame (401), the flat plugs of the two side wires are inserted into the support frame (401) to be contacted and clamped and fixed, then the cold-pressing sleeve (4) is fixed together with the flat plugs on the two sides and is externally wrapped with an insulating shielding layer (402).

3. The transformer winding parallel tapping structure of claim 1, wherein: The borrowed position lead wire (3) is wound on the non-full-turn area of the first cake or the second cake of the outermost winding of the first limb (1).

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