CN218826577U

CN218826577U - Transposition lead connector device for transformer

Info

Publication number: CN218826577U
Application number: CN202223298311.XU
Authority: CN
Inventors: 任翰卿; 徐徐; 张永泽; 石毛毛
Original assignee: China XD Electric Co Ltd; Xian XD Transformer Co Ltd
Current assignee: China XD Electric Co Ltd; Xian XD Transformer Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-07
Anticipated expiration: 2032-12-08

Abstract

The utility model belongs to the technical field of transformer lead wires, and relates to a transposition lead wire connector device for a transformer, which comprises two lead wire main bodies which are arranged in a crossed manner, wherein each lead wire main body comprises a connecting rod and two lead wire connectors, the two lead wire connectors are connected through the connecting rod, and the lead wire connectors are hollow structures; the rods are connected to form a Z-shaped structure; the first cross rod comprises a first horizontal section, a first inclined section and a second horizontal section which are connected in sequence, and the second cross rod comprises a third horizontal section, a second inclined section and a fourth horizontal section which are connected in sequence; the first inclined section and the second inclined section are inclined in opposite directions, and the axes of the two lead connectors are collinear. The lead transposition is realized through the lead main bodies which are arranged in a crossed manner, after the lead is transposed in the center position of the transformer body in a crossed manner, two turn chain areas with the same area are formed between the leads which are connected in parallel in the radial direction, induced electromotive forces in the two areas are mutually offset, the additional loss is reduced, and the situation that the circulating current of the leads which are connected in parallel is very small in operation can be ensured.

Description

Transposition lead connector device for transformer

Technical Field

The utility model belongs to the technical field of the transformer lead wire, concretely relates to transposition pin joint device for transformer.

Background

The lead connection of the transformer refers to the connection between the winding leading-out ends and the lead wires or the connection between the winding leading-out ends.

When the transformer lead passes through the leakage region, different leakage magnetic potentials appear between the conductors connected in parallel in the radial direction due to different leakage magnetic chains of the respective turn chains, circulating current is generated between the branches, and then the circulating current flows through the wire resistor to generate circulating current loss, so that the lead is heated, and the insulation aging is accelerated.

On the other hand, the lead cable of the transformer winding is not easy to shape, the lead space after bending cannot be controlled, and the lead insulation is easy to contact with each other during cross transposition, so that insulation breakage is caused under working condition vibration, and product accidents are caused.

Through retrieval, patent document CN105355418B discloses a transformer cross lead self-transposition device, which is a mechanical device, aims to realize different connection methods between leads and equipment or components, is a device for switching the lead connection mode of equipment or components, can only prevent lead cross transposition friction fracture, and still cannot solve the problem that a parallel lead passes through a magnetic leakage area to generate circulation current.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transposition lead wire connector device for transformer has solved parallelly connected lead wire and has passed the regional problem that produces the circulation of magnetic leakage.

The utility model discloses a realize through following technical scheme:

a transposition lead connector device for a transformer comprises two lead main bodies which are arranged in a crossed mode, wherein each lead main body comprises a connecting rod and two lead connectors, the two lead connectors are connected through the connecting rod, and the lead connectors are both of hollow structures;

the connecting rod comprises a first cross rod, a middle inclined rod and a second cross rod, and the first cross rod and the second cross rod are connected through the middle inclined rod to form a Z-shaped structure;

the first cross rod comprises a first horizontal section, a first inclined section and a second horizontal section which are connected in sequence, and the second cross rod comprises a third horizontal section, a second inclined section and a fourth horizontal section which are connected in sequence;

the first inclined section and the second inclined section are inclined in opposite directions, and the axes of the two lead connectors are collinear.

Further, the lead body includes a first lead body and a second lead body;

the first lead body comprises a first lead joint, a first connecting rod and a second lead joint which are connected in sequence, and the second lead body comprises a third lead joint, a second connecting rod and a fourth lead joint which are connected in sequence;

the first lead joint and the third lead joint are positioned on one side, and the third lead joint is positioned right below the first lead joint; the second lead joint and the fourth lead joint are positioned at the other side, and the second lead joint is positioned right below the fourth lead joint.

Furthermore, the edges of the connecting rods are all prefabricated into fillets.

Furthermore, the lead wire connector and the connecting rod are made of pure copper.

Further, the two lead connectors are welded with the connecting rod.

Further, the lead connector comprises a cylinder and a connecting connector, and the connecting connector is connected with the end of the connecting rod.

Furthermore, a plurality of exhaust holes are formed on the cylinder.

Furthermore, the exhaust holes are opened along the axial direction of the cylinder at a distance of 15mm, and the center of the exhaust hole closest to the end face of the connecting rod is 6.5mm away from the end face of the connecting rod.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a transposition lead wire connector device for transformer contains two lead wire main parts that are alternately laid, realizes lead wire transposition through two lead wire main parts that are alternately laid, and lead wire will form two circle chain areas with equal area between the lead wires that are parallelly connected in the radial direction after the central point of transformer body is alternately transposed, and the induced electromotive force in two areas offsets each other, and the additional loss reduces, can guarantee that the circulating current is very little when parallelly connected lead wire moves; each lead main body comprises a connecting rod and two lead connectors, the support performance between every two lead connectors is greater than that of every two leads, the leads can better bear the jolt of transportation, the vibration of long-term operation and the impact of short-circuit electrodynamic force, and the insulation performance of the lead transposition part is ensured; two lead wire connects pass through the connecting rod and connect, and the shape of connecting rod makes to connect the cross position space controllable for the design of buckling, makes things convenient for insulating to wrap up and avoids appearing great bulging phenomenon.

Furthermore, a plurality of exhaust holes are prefabricated on each lead connector, so that the position of the lead when the lead extends can be observed conveniently, and gas is arranged in the connector device when oil is injected.

Drawings

Fig. 1 is a schematic three-dimensional space diagram of the present invention;

fig. 2 is a schematic diagram of the three-dimensional space after the connection with the lead wire of the present invention.

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic structural view of a lead tab;

fig. 5 is a schematic diagram of the transformer transposition lead connector device of the present invention.

In the figure: 1. a first lead connector; 2. an exhaust hole; 3 is a connecting rod; 4. a third lead tab; 5. a second lead tab; 6. a fourth lead tab; 7. a transformer body;

11. a cylinder; 12. connecting a joint connector;

31. a first horizontal segment; 32. a first inclined section; 33. a second horizontal segment; 34. a middle diagonal rod; 35. a third horizontal segment; 36. a second inclined section; 37. a fourth horizontal segment;

aa. Bb is a lead;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the following detailed description is made with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention.

The components described and illustrated in the drawings and embodiments of the present invention may be arranged and designed in a wide variety of different configurations, and accordingly, the detailed description of the embodiments of the present invention provided in the drawings below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention. Based on the drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, element, method, article, or apparatus. Furthermore, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the drawings and are only used for better describing the present invention, but do not require that the devices, components or equipment shown must have this particular orientation, and therefore should not be construed as limiting the present invention.

The features and properties of the present invention are further described in detail below with reference to examples.

Referring to fig. 1 to fig. 3, the transposition lead connector device for transformer of the present invention comprises two first lead bodies and two second lead bodies, which are alternately arranged, and the first lead bodies and the second lead bodies have the same structure. Each lead wire main part includes connecting rod 3 and two lead wire connectors, and two lead wire connectors pass through connecting rod 3 and connect, and the lead wire connector is hollow structure.

As shown in fig. 2, the connecting rod 3 comprises a first cross rod, a middle diagonal rod 34 and a second cross rod, and the first cross rod and the second cross rod are connected through the middle diagonal rod 34 to form a Z-shaped structure; the first cross rod comprises a first horizontal section 31, a first inclined section 32 and a second horizontal section 33 which are connected in sequence, and the second cross rod comprises a third horizontal section 35, a second inclined section 36 and a fourth horizontal section 37 which are connected in sequence; the first angled section 32 and the second angled section 36 are angled in opposite directions to ensure that the axes of the two wire bonds are collinear.

Specifically, as shown in fig. 1, the first lead body includes a first lead tab 1, a first connection bar, and a second lead tab 5, which are connected in sequence, and the second lead body includes a third lead tab 4, a second connection bar, and a fourth lead tab 6, which are connected in sequence.

The first lead connector 1 and the third lead connector 4 are positioned on the same side, the upper and lower positions are aligned, and the third lead connector 4 is positioned below the first lead connector 1; the second terminal 5 and the fourth terminal 6 are located on the same side, aligned in an up-down position, and the second terminal 5 is located below the fourth terminal 6.

As shown in fig. 4, each of the lead tabs includes a barrel 11 and a connection tab 12, and the connection tab 12 is connected to the end of the connection rod 3. The link of attach fitting 12 is equipped with 2 lugs, conveniently is connected with connecting rod 3, stable in structure.

The cylinder 11 is provided with a plurality of vent holes 2 which are used as inspection holes for leading wires to extend into and air outlet holes for product vacuum oil injection to ensure that gas in the channel at the joint is exhausted, the vent holes 2 are positioned at the upper end of the joint device, and the vent holes 2 and all edges are chamfered R0.5.

Specifically, the exhaust holes 2 are opened at an axial interval of 15mm along the cylinder 11, and the center of the exhaust hole 2 closest to the end face of the connecting rod 3 is 6.5mm away from the end face of the connecting rod 3.

The connecting rod 3 is made of T2 pure copper, and is formed by extrusion and then bent.

After finishing winding end finishing, cutting the lead into A and a (or B and B), extruding the cut end into a round shape by using a die, respectively inserting the end into a first lead connector 1 and a second lead connector 5 (or a third lead connector 4 and a fourth lead connector 6) for cold extrusion welding, observing through an exhaust hole 2 to ensure that the insertion position of the end is proper, ensuring that two adjacent leads and the connectors are basically in parallel after cold pressing is finished, enabling the end surfaces of the upper connector and the lower connector of the device to be in the same plane, and finally binding the connectors by using crepe paper to avoid the metal parts of the connectors from contacting with each other.

As shown in fig. 5, a represents the principle before transposition, and when the lead is not transposed, the induced electromotive force directions are superposed in the same direction; and a diagram b is a principle after transposition, after the leads are subjected to transposition in the center position of the transformer body 7, two turn-chain areas with the same area are formed between the leads which are connected in parallel in the radial direction, induced electromotive forces in the two areas are mutually counteracted, the additional loss is reduced, and the small circulating current of the parallel leads in operation can be ensured.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.

Claims

1. A transposition lead connector device for a transformer is characterized by comprising two lead main bodies which are arranged in a crossed mode, wherein each lead main body comprises a connecting rod (3) and two lead connectors, the two lead connectors are connected through the connecting rod (3), and the lead connectors are of hollow structures;

the connecting rod (3) comprises a first cross rod, a middle inclined rod (34) and a second cross rod, and the first cross rod and the second cross rod are connected through the middle inclined rod (34) to form a Z-shaped structure;

the first cross rod comprises a first horizontal section (31), a first inclined section (32) and a second horizontal section (33) which are sequentially connected, and the second cross rod comprises a third horizontal section (35), a second inclined section (36) and a fourth horizontal section (37) which are sequentially connected;

the first inclined section (32) and the second inclined section (36) are inclined in opposite directions, and the axes of the two lead connectors are collinear.

2. The transposed lead tab device for a transformer of claim 1, wherein the lead body comprises a first lead body and a second lead body;

the first lead body comprises a first lead joint (1), a first connecting rod and a second lead joint (5) which are connected in sequence, and the second lead body comprises a third lead joint (4), a second connecting rod and a fourth lead joint (6) which are connected in sequence;

the first lead joint (1) and the third lead joint (4) are positioned on one side, and the third lead joint (4) is positioned right below the first lead joint (1); the second lead joint (5) and the fourth lead joint (6) are positioned at the other side, and the second lead joint (5) is positioned right below the fourth lead joint (6).

3. The transposed lead connector device for transformers according to claim 1, wherein the edges of the connecting rods (3) are all prefabricated with rounded corners.

4. The transposed lead connector device for transformers according to claim 1, wherein the lead connector and the connecting rod (3) are made of pure copper.

5. The transposed lead tab device for a transformer according to claim 1, wherein two lead tabs are welded to the connection bar (3).

6. The transposed lead connector device for transformers according to claim 1, wherein the lead connector comprises a cylinder (11) and a connection connector (12), the connection connector (12) being connected to the end of the connection rod (3).

7. The transposed lead connector device for transformers according to claim 1, wherein a plurality of vent holes (2) are opened on the cylinder (11).

8. A transposed lead connector device for transformers according to claim 7, characterized in that the vent holes (2) are opened at an axial distance of 15mm along the cylinder (11), and the center of the vent hole (2) nearest to the end face of the connecting rod (3) is 6.5mm away from the end face of the connecting rod (3).