CN212392126U - Distribution transformer - Google Patents

Abstract

The utility model provides a distribution transformer, including the iron core, primary and secondary, each coil in primary and the secondary twines into the drum shape and has the surface around the iron core by the wire, first terminal surface and second terminal surface, the wire of each coil includes the wire portion that the multistage continues, be first and second wire portion with two sections adjacent wire portion definitions, first and second wire portion have first and second lead-out wire respectively, first and second lead-out wire extend to the outside of the surface of coil and link together through connecting terminal. In order to avoid the broken string welding part to be located inside the coiling coil, thereby improve the reliability and the maintainability of product, the utility model discloses a distribution transformer is through making the broken string connecting portion extend to distribution transformer outside to connect the lead-out wire through connecting terminal, can simplify the process, more do benefit to production, the connection of distribution transformer's coil is more reliable, has connection problem, restores more easily.

Description

Distribution transformer

Technical Field

The utility model relates to a distribution transformer.

Background

The transformer is a device for transmitting electric energy or electric signals by utilizing the principle of electromagnetic induction, and has the functions of transforming voltage, transforming current and transforming impedance. The transformers are of various types and are widely applied. A distribution transformer is a stationary electrical device that is used to transform an alternating voltage (current) of a certain value into another voltage (current) of the same frequency or different values. Current distribution transformers all include an iron core, a primary coil, and at least one secondary coil. Each coil of the distribution transformer is broken due to excessive tension on the wound wire or needs to be connected due to insufficient wire length in the winding process, and is not formed by a complete wire. In order to connect the wound wires, a welding method is generally used to connect the wires, and the welded wires are continuously wound, so that the welded portion is gradually located inside the wound coil, which may cause the welded portion to be unable to be repaired when the welded portion has a problem (e.g., a cold joint, a crack, etc.).

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in: the wire-breaking welding part is prevented from being positioned in the wound coil of the distribution transformer, so that the reliability and maintainability of the product are improved.

In order to overcome the disadvantages, the utility model discloses the measure of taking lies in: make distribution transformer's broken string connecting portion extend to distribution transformer coil outside to connect the lead-out wire through connecting terminal, can simplify the process like this, more do benefit to production, and distribution transformer coil's connection is more reliable, if have connection problem, restores more easily.

For this reason, according to an aspect of the present invention, the present invention provides a distribution transformer, the distribution transformer includes an iron core, a primary coil and a secondary coil, each of the primary coil and the secondary coil is wound into a cylindrical shape around the iron core by a wire and has an outer surface, a first end surface and a second end surface, the wire of each coil includes a plurality of continuous wire portions defining adjacent two wire portions as a first wire portion and a second wire portion, wherein the first wire portion has a first outgoing line, the second wire portion has a second outgoing line, the first outgoing line and the second outgoing line extend to the outside of the outer surface of the coil and are connected together through a connection terminal.

According to an embodiment of the present invention, the connecting terminal is a crimping connecting terminal. Thereby avoiding problems of cold joint, cracks, etc.

According to an embodiment of the invention, the part of the first lead-out wire not covered by the connecting terminal is covered by a first crepe paper tube, and the part of the second lead-out wire not covered by the second crepe paper tube covered by the connecting terminal.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not to scale.

Fig. 1 is a perspective view of a coil of a distribution transformer according to the present invention, in which a plurality of wire portions continuously wound into the coil are separately shown in a state of being wound into a coil for clear expression.

Fig. 2 is a perspective view of a coil of a distribution transformer according to the present invention, in which only connected lead-out wires are shown that continue to connect a pair of adjacent ones of a plurality of wire portions wound into the coil.

List of reference numerals

1. A coil;

1a, a first end face;

1b, a second end face;

1c. outer surface

2a. leading-out wire

2b. lead-out wire

3. A connection terminal;

4a. creped paper tube;

4b. creped paper tube.

Detailed Description

Referring now to the drawings, specific embodiments of the present invention will be described in detail. What has been described herein is merely a preferred embodiment in accordance with the present invention, and those skilled in the art will appreciate that other ways of implementing the present invention on the basis of the preferred embodiment will also fall within the scope of the present invention. In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "inner", "outer", and the like, are used with reference to the orientation as illustrated in the drawings. The components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting. "two adjacent conductor portions" refers to two conductor portions of a continuous connection of one coil of a distribution transformer.

The distribution transformer includes an iron core, a primary coil, and at least one secondary coil. Each coil 1 is formed by winding a wire around a core (not shown). The wire wound into a coil may include a plurality of wire segments, and after one wire segment is wound, the next wire segment is wound until the entire coil is wound. Finally, the wire portions are continuously connected. Fig. 1 is a perspective view of a coil of a distribution transformer according to the present invention, in which a plurality of wire portions continuously wound into the coil are separately shown in a wound state. In particular, a three-segment wire portion wound into a loop is shown in fig. 1. It should be noted that in the coil winding process, after the previous segment of the conductor portion is wound around the core, the next segment of the conductor portion is wound. The length of each segment of the wire part can be the same or different according to actual conditions. Each wire portion has a head end and a tail end. In the wound coil, the extension portions of the head end and the tail end of the adjacent wire portions are lead-out wires.

Fig. 2 is a perspective view of a coil of a distribution transformer according to the present invention, showing only the connected lead-out wires that continue to one of the pairs of adjacent wire portions in the multi-segment wire portion wound into the coil. According to the utility model discloses a distribution transformer each coil 1 in primary and secondary coil is twined into the drum shape and has surface 1c, first terminal surface 1a and second terminal surface 1b around the iron core by the wire, and the wire of each coil 1 includes the wire part that the multistage continues. Two adjacent wire portions are defined as a first wire portion having a first lead wire 2a and a second wire portion having a second lead wire 2b, the first lead wire 2a and the second lead wire 2b extending to the outside of the outer surface 1c of the coil 1 and being connected together by a connection terminal 3.

According to a preferred embodiment, the connection terminal 3 is a crimp connection terminal. Of course, the connection terminals can also be connected in other ways.

According to the utility model discloses a distribution transformer's coil, owing to make the first lead-out wire 2a of one section wire guide part and the second lead-out wire 2 b's of another section adjacent wire guide part connecting portion be located coil 1 outside, if any flaw appears in the connecting portion of the first lead-out wire 2a that link together and second lead-out wire 2b, for example connect insecurely, the operator can detect the connecting portion of first lead-out wire 2a and second lead-out wire 2b in coil 1's outside to further reconnect. Convenient detection and operation and strong product stability.

As further shown in fig. 2, the portion of the first lead wire 2a not covered by the connection terminal 3 is covered by the first crepe paper tube 4a, and the portion of the second lead wire 2b not covered by the connection terminal 3 is covered by the second crepe paper tube 4b without contacting with surrounding parts.

According to a preferred embodiment of the present invention, the first and second outgoing lines 2a and 2b may be fixed to the outer surface 1c of the coil 1 by fixing means known in the art (e.g., gluing, binding, coating, etc.), or may be fixed to the outer cylindrical surface 1c of the distribution transformer coil 1 by only relying on the rigidity of the materials of the first and second outgoing lines 2a and 2b.

The utility model has the advantages that: through making the broken string connecting portion extend to distribution transformer outside to connect the lead-out wire through connecting terminal, can simplify the process, more do benefit to production, and the connection of distribution transformer's coil is more reliable, if have the connection problem, restores more easily.

The foregoing description of various embodiments of the invention is provided to one of ordinary skill in the relevant art for the purpose of illustration. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. As noted above, various alternatives and modifications of the present invention will be apparent to those skilled in the art of the above teachings. Thus, while some alternative embodiments are specifically described, other embodiments will be apparent to, or relatively easily developed by, those of ordinary skill in the art. The present invention is intended to embrace all such alternatives, modifications and variances of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention as described above.

Claims (4)

1. A distribution transformer comprising a core, a primary coil and a secondary coil, each coil (1) of the primary and secondary coils being wound around the core by a wire into a cylindrical shape and having an outer surface (1c), a first end surface (1a) and a second end surface (1b), the wire of each coil (1) comprising a plurality of successive wire portions, adjacent wire portions of two segments being defined as a first wire portion and a second wire portion, characterized in that,

the first lead portion has a first lead-out wire (2a),

the second lead portion has a second lead-out wire (2b),

the first lead wire (2a) and the second lead wire (2b) extend to the outside of the outer surface (1c) of the coil (1) and are connected together by a connection terminal (3).

2. Distribution transformer according to claim 1, characterized in that the connection terminals (3) are crimp connection terminals.

3. The distribution transformer according to claim 1 or 2, characterized in that the portion of the first lead-out wire (2a) not covered by the connection terminal (3) is covered by a first corrugated paper tube (4a), and the second lead-out wire (2b) not covered by the connection terminal (3) is covered by a second corrugated paper tube (4 b).

4. Distribution transformer according to claim 1 or 2, characterized in that the connection terminals (3) are fixed to the outer surface (1c) of the coil (1) in question.

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