CN217606655U - Transformer - Google Patents

Abstract

The utility model provides a transformer, which comprises a shell, an output end and an output terminal, wherein the output end is arranged inside the shell, and an external lead is connected with the output end through the output terminal; the output terminal comprises an outer terminal, an inner terminal and a cover terminal which are connected in sequence, the outer terminal is arranged outside the shell, one part of the inner terminal is arranged inside the shell, the other part of the inner terminal extends out of the shell and is nested with the outer terminal, and the cover terminal is arranged on the output terminal. The outer lead is connected into the output end inside the shell through the output terminal, the output terminal can provide guiding, supporting and fixing effects, the part of the inner terminal extending out of the shell is nested with the outer terminal, so that the sealing performance between the inner terminal and the outer terminal is improved, the sealing performance between the inner cavity of the output terminal and the external environment is improved, the sealing performance of the transformer is improved, the pollution condition of the inner space of the shell is reduced, and the service life of the transformer is prolonged.

Description

Transformer

Technical Field

The utility model relates to a transformer technical field especially relates to a transformer.

Background

The wiring scheme of the high-voltage output end of the high-voltage transformer is one of the key points of the design of the transformer. The external lead is connected with the transformer through a high-voltage output terminal, and the wiring scheme of the high-voltage output end is mainly divided into an open type and an embedded type according to different structural modes of the junction of the wiring terminal. The open type wiring mode is suitable for the range with open working environment and small component density, has certain limitation, and can not ensure effective safety condition and distance along with the change of external environment temperature and humidity. The embedded solution is more reliable than the open structure.

However, in the existing embedded installation mode, the outside of the high-voltage output terminal and the inside of the transformer cannot be effectively and reliably sealed, and along with the long-time work of the transformer, the inner space of the transformer is polluted and the insulation fails due to the fact that the transformer cannot be effectively sealed, and therefore, the product is prolonged along with the increase of the working time. Moreover, the distance between the contact surfaces is easily affected along with the stress of the external lead, so that the product is failed.

Therefore, the transformer in the prior art has the problem of short service life.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a transformer to solve the shorter problem of transformer life among the prior art.

The embodiment of the utility model provides a transformer, including casing, output and output terminal, the output sets up in the inside of the casing, the outside lead wire passes through the output terminal and is connected with the output;

the output terminal comprises an outer terminal, an inner terminal and a cover terminal which are sequentially connected, the outer terminal is arranged outside the shell, one part of the inner terminal is arranged inside the shell, the other part of the inner terminal extends out of the shell and is nested with the outer terminal, and the cover terminal is arranged on the output terminal.

Optionally, the outer terminal includes a first sleeve and a first flange, the inner terminal includes a second sleeve, a third sleeve and a second flange, the first sleeve is nested with the second sleeve, the second flange is disposed between the second sleeve and the third sleeve, and the first flange is detachably connected with the second flange.

Optionally, the inner terminal further includes a third flange, the third flange is disposed at a position of the third sleeve away from the second flange, and the cap terminal is detachably connected to the third flange.

Optionally, the first flange plate and the second flange plate are respectively provided with first grooves which are oppositely arranged, and first sealing rings are arranged in the first grooves which are oppositely arranged;

and/or, second grooves which are oppositely arranged are respectively formed in the cover terminal and the third flange plate, and second sealing rings are arranged in the second grooves which are oppositely arranged.

Optionally, the first flange plate and the second flange plate are respectively provided with a first bolt hole;

and/or the cover terminal and the third flange are respectively provided with a second bolt hole.

Optionally, the lid terminal includes lid and thimble, the thimble passes through the lid sets up the output, the thimble be used for with outside lead-in butt.

Optionally, a connection hole is formed in a center of the cover, and the thimble is disposed in the connection hole.

Optionally, the ejector pin is a threaded spring contact ejector pin.

Optionally, the outer terminal is of a unitary structure, and/or the inner terminal is of a unitary structure.

Optionally, an end of the outer terminal remote from the inner terminal is provided with a cable joint.

The embodiment of the utility model provides an in, insert the inside output of casing through output terminal with external lead, output terminal can provide direction, support and fixed action, and the part that stretches out to the casing outside of interior terminal is nested mutually with outer terminal to promote the leakproofness between interior terminal and the outer terminal, thereby improve the leakproofness of output terminal inner chamber and external environment, and then promote the leakproofness of transformer, reduce the casing inner space and receive the condition of pollution, prolong the life of transformer.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a transformer according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an output terminal of a transformer according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an outer terminal of an output terminal according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an inner terminal of an output terminal according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a cover terminal of an output terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be understood that the structures so used are interchangeable under appropriate circumstances such that embodiments of the invention can be practiced in sequences other than those illustrated or described herein, and the terms "first," "second," and the like are generally used herein in a generic sense without limitation to the number of terms, e.g., the first term can be one, or more than one.

The embodiment of the utility model provides a transformer, as shown in fig. 1 to 5, including output terminal 1, output 2 and casing 3, output 2 is arranged inside casing 3, the external lead wire is connected with output 2 through output terminal 1;

the output terminal 1 includes an outer terminal 11, an inner terminal 12, and a cap terminal 13 connected in this order, the outer terminal 11 being disposed outside the housing 3, a part of the inner terminal 12 being disposed inside the housing 3, another part of the inner terminal 12 extending outside the housing 3 and being nested with the outer terminal 11, and the cap terminal 13 being disposed on the output terminal 2.

In this embodiment, an external lead is connected to the output end 2 inside the housing 3 through the output terminal 1, the output terminal 1 can provide guiding, supporting and fixing functions, the portion of the inner terminal 12 extending out of the housing 3 is nested with the outer terminal 11, so as to improve the sealing property between the inner terminal 12 and the outer terminal 11, thereby improving the sealing property between the inner cavity of the output terminal 1 and the external environment, further improving the sealing property of the transformer, reducing the pollution of the inner space of the housing 3, and prolonging the service life of the transformer.

The output terminal 1 may be a high-voltage output terminal of a low-frequency oil-immersed transformer. The number of the groups of the high-voltage output terminals 1 of the transformer can be flexibly adjusted according to the design requirements of users and the size of the size on the premise of meeting the design specifications, and is not limited herein.

The portion of the inner terminal 12 protruding outside the housing 3 may be embedded in the outer terminal 11, passing through the outer terminal 11 to increase the effective wiring distance of the transformer from the external lead.

Optionally, the outer terminal 11 includes a first sleeve 111 and a first flange 112, the inner terminal 12 includes a second sleeve 121, a third sleeve 122 and a second flange 123, the first sleeve 111 is nested with the second sleeve 121, the second flange 123 is disposed between the second sleeve 121 and the third sleeve 122, and the first flange 112 is detachably connected to the second flange 123.

In this embodiment, the first sleeve 111 is nested with the second sleeve 121 to improve the sealing property between the inner terminal 12 and the outer terminal 11. The second sleeve 121 may be embedded in the first sleeve 111 and fixed to the second flange 123 through the first flange 112, so as to enhance the connection stability and sealing performance between the outer terminal 11 and the inner terminal 12, reduce the entry of contaminants such as dust and rain water into the housing 3 through the gap between the outer terminal 11 and the inner terminal 12, and prolong the service life of the transformer.

The first flange plate 112 and the second flange plate 123 are respectively provided with a first bolt hole. The first flange plate 112 may be uniformly provided with 5 first bolt holes, and the second flange plate 123 is provided with the same first bolt holes corresponding to the first flange plate 112. After the first sleeve 111 is sleeved on the second sleeve 121, the first flange 112 is abutted with the second flange 123, the nesting length of the outer terminal 11 in the inner terminal 12 is limited by the second flange 123, and the outer terminal 11 is arranged outside the shell 3; the first bolt holes of the first flange 112 and the second flange 123 are then aligned and fastened by fixing screws and fixing nuts, and O-rings for screws may be disposed between the fixing screws and the first bolt holes to reduce the gap between the outer terminal 11 and the inner terminal 12.

The second flange 123 is disposed between the second sleeve 121 and the third sleeve 122, the outer diameter of the third sleeve 122 may be larger than the outer diameter of the second sleeve 121, and the outer diameter of the third sleeve 122 may be the same as the outer diameter of the first sleeve 111, so that after the first sleeve 111 and the second sleeve 121 are nested, the outer diameters of the sleeves of the outer terminal 11 and the inner terminal 12 are the same, and the aesthetics of the output terminal 1 is enhanced. The first, second and third sleeves 111, 121 and 122 may have the same inner diameter and may be adapted to an external lead so that the external lead is connected to the output terminal 2 through the output terminal 1.

Wherein, the inner terminal 12 further comprises a third flange 124, the third flange 124 is disposed at a position of the third sleeve 122 far away from the second flange 123, and the cap terminal 13 is detachably connected to the third flange 124. The third flange 124 is fixed with the cover terminal 13, and after an external lead is connected into the housing 3, the external lead is connected with the output end 2, one end of the inner terminal 12 can be fixed at the output end 2, and the other end of the inner terminal 12 is connected with the third flange 124, so that the inner terminal 12 is fixed on the output end 2, and it is ensured that the high-voltage lead, namely the external lead, in the circular inner cavity of the output terminal 1 does not move along with the change of the external force when the external force is applied.

The lid terminal 13 and the third flange 124 may have second bolt holes respectively, the third flange 124 may have 5 second bolt holes uniformly, and the lid terminal 13 and the third flange 124 have the same second bolt holes correspondingly. After the external lead sequentially passes through the inner cavities of the outer terminal 11 and the inner terminal 12, the second bolt holes on the cap terminal 13 and the third flange 124 are aligned and fastened by the fixing screw and the fixing nut, and an O-ring for screw may be disposed between the fixing screw and the second bolt hole to reduce a gap between the cap terminal 13 and the third flange 124.

Optionally, the first flange 112 and the second flange 123 are respectively provided with first grooves which are oppositely arranged, and first sealing rings are arranged in the first grooves which are oppositely arranged;

and/or, the cover terminal 13 and the third flange 124 are respectively provided with second grooves which are oppositely arranged, and second sealing rings are arranged in the second grooves which are oppositely arranged.

In this embodiment, the outer terminal 11 and the inner terminal 12 adopt an embedded sealing structure, the first flange 112 and the second flange 123 are respectively provided with a first groove which is arranged oppositely, and the first sealing ring is arranged in the first groove, so that the sealing performance of the connection position of the outer terminal 11 and the inner terminal 12 can be realized while the structure is precise.

Similarly, the lid terminal 13 and the third flange 124 are respectively provided with second grooves arranged oppositely, and second sealing rings are arranged in the second grooves, so that the tightness of the joint between the lid terminal 13 and the inner terminal 12 can be realized while the structure is strict. Therefore, the isolation of the round inner cavity inside the output terminal 1 to the external environment is improved, and the service life of the product is prolonged.

Optionally, the cover terminal 13 includes a cover 131 and a thimble 132, the thimble 132 is disposed at the output end 2 through the cover 131, and the thimble 132 is configured to abut against the external lead.

In this embodiment, the thimble 132 may be a screw-type spring contact thimble to enhance the elasticity of the thimble 132, so as to improve the flexibility of the contact under the effective connection condition. Meanwhile, the contact surface of the thimble 132 and the external lead may be gold-plated to increase the conductivity. Specifically, one end of the external lead connected to the output end 2 may also be provided with a threaded spring contact thimble, and the thimble on the external lead is abutted to the thimble 132 after sequentially passing through the inner cavities of the outer terminal 11 and the inner terminal 12, so as to control the connection state of the external lead and the output end of the transformer through the electrical module, thereby improving convenience when the transformer is powered on or powered off.

The cover 131 may have a connection hole 1311 at a central position thereof, and the thimble 132 is disposed at the connection hole 1311. The inner wall of the connection hole 1311 may be provided with a screw thread, the first end of the thimble 132 may be provided with an external screw thread corresponding to the internal screw thread of the connection hole 1311, the second end of the thimble 132 opposite to the first end is a spring end, and the spring end of the thimble 132 is opposite to the spring end of the thimble of the external lead. A limiting structure is arranged between the first end and the second end of the thimble 132, and the thimble 132 and the cover 131 are fixed by the limiting structure, so that the slipping of the thimble 132 is reduced under the action of external force.

A third sealing ring may be disposed between the cover 131 and the thimble 132. The gap between the cover 131 and the thimble 132 is reduced by the third seal ring, and the sealing performance of the output terminal 1 is improved.

Alternatively, the outer terminal 11 may be a unitary structure, and/or the inner terminal 12 may be a unitary structure.

The outer terminal 11 may be a unitary structure formed by a process such as stamping or forging, for example, the first sleeve 111 and the first flange 112 may be unitary structures to improve the sealing performance of the outer terminal 11;

and/or the inner terminal 12 may be a unitary structure made by a process such as stamping or forging, for example, the second sleeve 121, the third sleeve 122, the second flange 123 and the third flange 124 may be unitary structures to improve the sealing of the inner terminal 12. Thereby reducing the situation that contaminants such as dust, rain water and the like enter the inside of the housing 3 through the outer terminal 11 or the inner terminal 12 and prolonging the service life of the transformer.

Alternatively, an end of the outer terminal 11 remote from the inner terminal 12 is provided with a cable connector.

In this embodiment, the cable connector may be a PG type M30 threaded cable connector, an internal thread is provided on an inner wall of an end of the outer terminal 11 far from the inner terminal 12, the cable connector is provided on the outer terminal 11, and the high-voltage lead wire embedded in the inner cavity of the output terminal 1 is locked by the cable connector, so that when the external force is applied, the high-voltage lead wire in the inner cavity of the output terminal 1 does not move along with the change of the external force, thereby reducing the influence on the transformer.

The output terminal 1 may be a high-voltage output terminal of a low-frequency oil-immersed transformer, and the transformer may include a plurality of output terminals 1. The electrical connection part adopts a threaded spring contact thimble 132, and the effective connection of the contact surface of the high-voltage output end is ensured through an efficient spring structure. Meanwhile, the PG type M30 threaded cable joint can lock the high-voltage lead wire embedded in the circular cavity of the high-voltage terminal, so that the high-voltage lead wire in the circular cavity of the terminal cannot move along with the change of the external force when the external force is applied, and the influence on the effective contact part of the high-voltage lead wire and the ejector pin 132 is reduced. The high-voltage output exposed node part is isolated from the external environment and is not polluted by the closed circular inner cavity. The work and the life of high-voltage transformer product have effectively been prolonged.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, 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, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus of the embodiments of the present invention is not limited to performing functions in the order discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims (10)

1. A transformer is characterized by comprising a shell, an output end and an output terminal, wherein the output end is arranged in the shell, and an external lead is connected with the output end through the output terminal;

the output terminal comprises an outer terminal, an inner terminal and a cover terminal which are sequentially connected, the outer terminal is arranged outside the shell, one part of the inner terminal is arranged inside the shell, the other part of the inner terminal extends out of the shell and is nested with the outer terminal, and the cover terminal is arranged on the output terminal.

2. The transformer of claim 1, wherein the outer terminal comprises a first sleeve and a first flange, the inner terminal comprises a second sleeve, a third sleeve and a second flange, the first sleeve is nested with the second sleeve, the second flange is disposed between the second sleeve and the third sleeve, and the first flange is detachably connected with the second flange.

3. The transformer of claim 2, wherein the inner terminal further comprises a third flange disposed at a location of the third sleeve distal from the second flange, the cap terminal being removably coupled to the third flange.

4. The transformer according to claim 3, wherein the first flange plate and the second flange plate are respectively provided with oppositely arranged first grooves, and first sealing rings are arranged in the oppositely arranged first grooves;

and/or the cover terminal and the third flange plate are respectively provided with second grooves which are oppositely arranged, and second sealing rings are arranged in the second grooves which are oppositely arranged.

5. The transformer according to claim 3, wherein the first flange plate and the second flange plate are respectively provided with first bolt holes;

and/or second bolt holes are formed in the cover terminal and the third flange respectively.

6. The transformer of claim 1, wherein the cover terminal comprises a cover and a pin, the pin is disposed at the output end through the cover, and the pin is configured to abut against the external lead.

7. The transformer of claim 6, wherein a connection hole is formed at a central position of the cover, and the thimble is disposed in the connection hole.

8. The transformer of claim 6, wherein the pin is a threaded spring contact pin.

9. The transformer according to claim 1, wherein the outer terminal is of a unitary structure and/or the inner terminal is of a unitary structure.

10. The transformer of claim 1, wherein an end of the outer terminal remote from the inner terminal is provided with a cable connector.

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