CN213905101U

CN213905101U - Connecting terminal of traction transformer

Info

Publication number: CN213905101U
Application number: CN202022918832.5U
Authority: CN
Inventors: 赵亚楠
Original assignee: Beijing Huabaisi Technology Co ltd
Current assignee: Beijing Huabaisi Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-08-06
Anticipated expiration: 2030-12-08

Abstract

The utility model provides a connecting terminal of a traction transformer, which is used for solving the technical problem that the existing connecting terminal for high-speed rails is easy to crack; the structure includes: the connector comprises a C-shaped connector, an annular connecting part and a lower end connecting part, wherein the shape of the lower end connecting part is conical, and one or more of a graphene shielding net, a graphene-coated carbon fiber shielding net or a surface-modified carbon fiber shielding net is arranged in the annular connecting part. The utility model discloses an adopt graphite alkene and/or carbon fiber as binding post's shielding net, can obtain the coefficient of thermal expansion similar to with epoxy to can obtain the electromagnetic shield result of use that compares favorably with original copper wire shielding net, to improving binding post's life, prevent that it from taking place to explode to split and have great technological meaning in using, can carry the safe operating performance of rising iron and reduce the maintenance replacement cost of this part.

Description

Connecting terminal of traction transformer

Technical Field

The utility model relates to a cable sleeve technical field, concretely relates to traction transformer binding post.

Background

The upper end part of a connecting terminal of a traction transformer used on a high-speed rail in the prior art is a C-shaped joint, the lower end part is conical, the length is long, and the connecting terminal is used for extending into transformer oil liquid when in use. The central annular region is usually provided with a shielding mesh. The shielding net for the wiring terminal in the prior art is usually composed of copper wires and epoxy resin, fine cracks are generated on the insulating part of the wiring terminal when the shielding net for the wiring terminal of the conventional wiring terminal is locally overheated, the shielding net is easy to explode and crack when being used for a long time, and the technical potential hazards are brought to the safe operation of a high-speed rail. Analyzing the reason of the explosion, the phenomenon usually happens when the high-speed rail running voltage is unstable or when the high-speed rail is subjected to lightning impulse; because the coefficient of thermal expansion of copper wire is different from epoxy, the copper conductor that is located binding post can make the inside tiny fine line that produces of epoxy when the thermal expansion, and above-mentioned tiny crackle can slowly merge the expansion in use, until forming bigger crackle, finally initiate binding post to explode and split the inefficacy. The problem that the wiring terminal is cracked not only causes hidden danger to the safe operation of the high-speed rail, but also increases the hardware cost of the operation and maintenance of the high-speed rail to a certain extent by frequently replacing the wiring terminal to be cracked for ensuring the safe operation. In addition, the overlong size of the lower end of the conventional connecting terminal also has adverse effects on the structural appearance design of the high-speed rail traction transformer, so that the structural size of the transformer for the high-speed rail is overlarge, and the structural layout of other related components on the high-speed rail is influenced.

Therefore, it is necessary to develop a new type of terminal for traction transformer to solve the above technical problems.

Disclosure of Invention

The utility model aims at providing a binding post for solve the technical problem that current traction transformer binding post for high-speed railway easily explodes and splits.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a traction transformer binding post, include: the connector comprises a C-shaped connector, an annular connecting part and a lower end connecting part, wherein the lower end connecting part is conical in shape.

Preferably, the carbon fiber shielding net is made of carbon fibers with good conductivity; the thermal expansion coefficient of the carbon fiber shielding net is matched with that of epoxy resin.

Preferably, the axial length of the lower end connecting part is between 80 and 140 mm.

Preferably, the device further comprises a grounding lead; the ground lead is electrically connected with one or more of the graphene shielding net, the graphene-coated carbon fiber shielding net or the carbon fiber shielding net.

Preferably, the graphene shielding net is a graphene conductive film which is provided with meshes and is impregnated with epoxy resin; the thermal expansion coefficient of the graphene shielding net is matched with that of epoxy resin.

Preferably, the graphene-coated carbon fiber shielding net is formed by coating the surface of carbon fiber with graphene; the thermal expansion coefficient of the carbon fiber shielding net coated by the graphene is matched with that of epoxy resin.

Preferably, the carbon-based material constituting the carbon fiber shielding mesh, the graphene-coated carbon fiber shielding mesh, or the graphene shielding mesh is continuous carbon fibers impregnated with a resin glue solution.

The utility model discloses a characteristics and advantage are: the utility model discloses an adopt graphite alkene, one or several kinds of in the carbon fiber of carbon fiber or graphite alkene cladding are as traction transformer binding post's shielding net, and have between the epoxy better combination degree than the metallic shield net, can obtain the coefficient of thermal expansion similar to with epoxy, and can obtain the electromagnetic shield result of use that matches beauty with original copper wire shielding net, to improving binding post's life, it has great technological significance to prevent that it from taking place to explode to split in using, can carry the safe operating behavior of rising iron and reduce the maintenance replacement cost of this part.

Further, the utility model discloses a carbon fiber, graphite alkene cladding's carbon fiber shielding net or the carbon fiber shielding net that forms after the epoxy flooding have good electromagnetic shield nature to can compromise and possess the thermal expansion performance similar with epoxy, can effectively improve binding post's anti-explosion performance.

Further, the utility model discloses an axis length that is used for inserting the one end of transformer fluid with traction transformer binding post sets up to between 80 to 140 millimeters, can obtain the result of use of optimizing high-speed railway transformer tank structure setting. The improved wiring terminal and the transformer matched with the wiring terminal can be smaller in structure size, so that the assembly space of related hardware is saved, and the wiring terminal has extremely important technical significance for optimizing the structural arrangement of the related hardware of a high-speed rail.

Further, the utility model discloses a for carbon fiber shielding net flooding epoxy, can eliminate the slight coefficient of thermal expansion difference that exists between carbon fiber shielding net and epoxy, the deformation difference between self-adaptation balance carbon fiber shielding net and epoxy prevents that epoxy from appearing slight crackle because of above-mentioned reason, can promote binding post's life.

Further, the utility model discloses a graphite alkene shielding net of epoxy flooding has good electromagnetic shielding nature to can compromise and possess the thermal expansion performance similar to epoxy, can improve binding post's anti-explosion performance.

Further, the utility model discloses a by graphite alkene shielding net, graphite alkene cladding carbon fiber shielding net and carbon fiber shielding net in one, two kinds or three kinds of phase combination can form effectual electromagnetic shield, can further improve high binding post's anti-explosion performance, the shielding net after the improvement is more close with epoxy in the aspect of the thermal expansion performance, can promote binding post's life by a wide margin.

Furthermore, continuous carbon fibers impregnated with resin glue solution are used as the carbon fiber shielding net, so that fine cracks generated due to uneven heating inside the wiring terminal can be limited to the resin layer attached to the outer surface of the carbon fibers in use, the use effect of restricting crack expansion is further achieved, and the anti-explosion performance of the high wiring terminal can be further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a connection terminal in embodiment 1 of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 1, the utility model provides a traction transformer binding post, include: a C-shaped joint 100, an annular connecting part 200 and a lower end connecting part 300 with a conical shape; one or more of a graphene shielding net, a graphene-coated carbon fiber shielding net, or a carbon fiber shielding net 210 is/are arranged in the annular connecting part 200.

When in use, the lower end connecting part 300 with the conical shape is inserted into the transformer and is immersed in the transformer oil; grounding the graphene shielding net, the graphene-coated carbon fiber shielding net, or the carbon fiber shielding net 210 for removing an electromagnetic field generated by induced current; the C-shaped connector 100 is connected to a high voltage power line.

The utility model discloses an adopt in graphite alkene, graphite alkene cladding's carbon fiber shielding net, or the carbon fiber shielding net one or several kinds of as binding post's shielding net, can obtain the coefficient of thermal expansion similar to with epoxy to can obtain the electromagnetic shield result of use that compares favorably with original copper wire shielding net, to improving binding post's life, prevent that it from taking place to explode to split in the use and have great technological meaning, can carry the safe operating performance of high iron and reduce the maintenance replacement cost of this part.

Further, in one preferable technical solution of this embodiment, the carbon fiber shielding mesh is formed by impregnating carbon fibers with epoxy resin; the thermal expansion coefficient of the carbon fiber shielding net is matched with that of epoxy resin. The carbon fiber shielding net formed by mixing the carbon fibers and the glass fibers in equal proportion has good electromagnetic shielding performance, can have thermal expansion performance similar to that of epoxy resin, and can improve the anti-explosion performance of the wiring terminal.

Further, in one preferable technical solution of this embodiment, an axial length of the lower end connecting portion is between 80 and 140 millimeters. The utility model discloses a set up the axis length that is used for binding post to insert the lower extreme connecting portion of the one end of transformer fluid to be between 80 to 140 millimeters, can obtain the result of use that optimizes high-speed railway transformer tank structure and set up. The improved wiring terminal and the transformer matched with the wiring terminal can be smaller in structure size, so that the assembly space of related hardware is saved, and the wiring terminal has extremely important technical significance for optimizing the structural arrangement of the related hardware of a high-speed rail.

Example 2:

the present embodiment further provides a traction transformer terminal on the basis of embodiment 1, and further includes: a ground lead; the ground lead is electrically connected with one or more of the graphene shielding net, the graphene-coated carbon fiber shielding net or the carbon fiber shielding net. It should be noted that the structure of the ground lead and the electrical connection manner between the ground lead and the graphene shielding net, the graphene-coated carbon fiber shielding net, or the carbon fiber shielding net are based on the prior art, and therefore, the details of the related structure are not further illustrated and described herein. In addition, if a plurality of layers of shielding nets are disposed in the annular connection portion, each layer of shielding net needs to be electrically connected to the ground lead.

Further, in one preferable technical solution of this embodiment, the carbon fiber shielding net is formed after being impregnated with epoxy resin. The utility model discloses a for carbon fiber shielding net flooding epoxy, can be when there is slight thermal expansion coefficient difference between carbon fiber shielding net and epoxy, the deformation difference between self-adaptation balance carbon fiber shielding net and epoxy prevents that epoxy from appearing slight crackle because of above-mentioned reason, can promote binding post's life.

Further, in one preferable technical solution of this embodiment, the graphene shielding mesh has a structure that is formed by a graphene conductive film provided with meshes; the thermal expansion coefficient of the graphene shielding net is matched with that of epoxy resin.

Further, in one preferred technical solution of this embodiment, the graphene shielding net is formed by impregnating an epoxy resin with a shielding net; the thermal expansion coefficient of the graphene shielding net is matched with that of epoxy resin. The utility model discloses a graphite alkene shielding net that forms behind by shielding net flooding epoxy has good electromagnetic shield nature to can compromise and possess the thermal expansion performance similar with epoxy, can improve binding post's anti-explosion performance.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A traction transformer terminal comprising: the connector comprises a C-shaped joint, an annular connecting part and a lower end connecting part with a conical shape, and is characterized in that one or two of a graphene shielding net or a carbon fiber shielding net is arranged in the annular connecting part; the thermal expansion coefficient of the carbon fiber shielding net is matched with that of epoxy resin; the thermal expansion coefficient of the graphene shielding net is matched with that of epoxy resin.

2. The traction transformer terminal as recited in claim 1, wherein the axial length of the lower end connection portion is between 80 and 140 mm.

3. The traction transformer terminal of claim 1, further comprising a ground lead; the ground lead is electrically connected with one or more of the graphene shielding mesh or the carbon fiber shielding mesh.

4. The traction transformer wiring terminal according to claim 1, wherein the graphene shielding mesh is structurally composed of a graphene conductive film provided with meshes.