CN211426610U

CN211426610U - Feed-through electronic transformer

Info

Publication number: CN211426610U
Application number: CN201921995088.XU
Authority: CN
Inventors: 陈昌炳; 黄志阳
Original assignee: Xiamen Kaizhong Electrical Co ltd
Current assignee: Xiamen Kaizhong Electrical Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-09-04
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a feed-through electronic transformer, which comprises a transformer coil and a wire outlet column, wherein the transformer coil comprises a magnetic core, a buffer layer coated on the surface of the magnetic core, a lower protective shell and an upper protective shell which are mutually fastened, an enameled wire is uniformly wound on the annular surfaces of the lower protective shell and the upper protective shell, the outer layer of the enameled wire is wound with semi-conductive crepe paper, and the outer layer of the semi-conductive crepe paper surrounds two circles of tinned copper wires; this punching electronic transformer fills the buffer layer that has the high elastic modulus between magnetic core and lower protective housing and last protective housing, the protection magnetic core is not by extrusion deformation, the dislocation, and at semi-conductive crepe paper of the outer winding of enameled wire and tinned wire, the interference of shielding field intensity when the coil normally circular telegram, guarantee the accuracy of the signal of gathering, outermost high temperature adhesive tape makes protection enameled wire not broken by the washing away, the paint film is not destroyed at the pouring in-process, improve the angle difference of mutual-inductor, the accuracy of ratio difference, the signal accuracy of gathering after using collection equipment is high.

Description

Feed-through electronic transformer

Technical Field

The utility model relates to a high voltage circuit breaker switchgear especially relates to a straight-through electronic transformer among the outdoor circuit breaker switchgear field.

Background

The existing feed-through electronic transformer coils are all external, namely the coils are coated with a layer of insulating material and placed outside the poles, so that the space is occupied, the cost is higher, and the built-in current transformer coils are easily impacted and extruded in epoxy casting to cause dislocation of iron cores, damage of enameled wires, poor angle difference and ratio difference of transformers, and inaccurate signals acquired by acquisition equipment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a magnetic core is difficult to be extruded dislocation deformation, and the accurate straight-through electronic transformer of angle difference, specific difference can cross improvement acquisition signal accuracy after using collection equipment.

In order to solve the above problem, the adopted technique of the present invention is as follows:

the utility model provides a punching electronic transformer, includes the mutual-inductor coil to and fix the outlet column on the mutual-inductor coil, the mutual-inductor coil includes the magnetic core, and the cladding is at the magnetic core on the surface, and paste the buffer layer of tight magnetic core, the lower protective housing and the last protective housing of mutual lock joint be used for protecting the magnetic core the even winding has the enameled wire on the annular surface of lower protective housing and last protective housing, and the outer winding of enameled wire has semiconduction crepe paper skin encircles two rings of tinned wire, tinned wire's the end of drawing forth and the initial line of magnetic core establish ties.

Furthermore, the buffer layer is a high-elasticity and high-temperature-resistant glue solution filling layer.

Further, the buffer layer, the lower protective shell, the upper protective shell, the enameled wire and the semi-conductive crepe paper are all made of H-grade heat-resistant insulating materials, wherein the buffer layer, the lower protective shell, the upper protective shell and the enameled wire are preferably impregnated with solvent-free impregnating resin.

Further, the outward flange department of protective housing sets up the recess down, the interior border department of going up the protective housing is provided with the sand grip for the mutual dislocation mode of protective housing and last protective housing is detained fixedly down.

Furthermore, the initial line of the enameled wire is connected with the tinned copper wire in series, and the tail end of the enameled wire is welded to two ends of the wire outlet column.

Furthermore, the outer layer of tinned wire still twines there is the high temperature adhesive tape, the high temperature adhesive tape covers the first layer glue film around tinned wire surface, and the second layer adhesive tape is formed around the half that the first layer adhesive tape covered high temperature adhesive tape again.

The pouring process for producing the straight-through electronic transformer comprises the following steps:

step 1) assembling a transformer coil: buckling and fixing a lower protective shell and an upper protective shell in a mutual dislocation mode, wrapping a magnetic core in the magnetic core, then filling high-elasticity and high-temperature-resistant glue solution into the lower protective shell and the upper protective shell after the lower protective shell and the upper protective shell are buckled, fixing the magnetic core after the glue solution is cooled and solidified, sequentially winding an enameled wire, semi-conductive crepe paper, a tinned copper wire and a high-temperature adhesive tape on the surfaces of the lower protective shell and the upper protective shell, and welding a leading-out end and a tail end of the enameled wire and a leading-out end and a tail end of the tinned copper wire to two ends of a wire outlet column;

step 2), assembling a built-in transformer coil: assembling the mutual inductor coil and the pole column which are assembled in the step 1) for later use;

step 3) epoxy casting: preheating a built-in transformer coil for one hour at 130 ℃ in the casting process, wherein the magnetic core, the lower protective shell and the upper protective shell expand under the action of heat, eliminating the generated stress through a buffer layer with high elasticity, and then performing casting epoxy to obtain a casting body;

when epoxy is poured, the impact force generated by the transformer coil is dissolved through the buffer layer, and the magnetic core is not dislocated or deformed, so that the whole pouring process is completed;

in the pouring process, epoxy at the pouring gate overflows quickly, pouring needs to be stopped in time, and the pouring pressure is adjusted to be 0.15Pa, so that epoxy is poured slowly, and the phenomenon that bubbles generated inside affect the pouring effect is avoided.

Step 4), cooling and solidifying: and transferring the casting body into a curing oven, horizontally placing the casting body, preserving heat for 10 hours at the temperature of 130 ℃, stopping heating, cooling to 80 ℃, preserving heat for 2 hours, and finishing curing to obtain the casting body without dislocation and deformation.

The beneficial effects of the utility model are that this punching electronic transformer fills the buffer layer that has the high elastic rate between magnetic core and lower protective case and last protective case, the protection magnetic core is not by extrusion deformation, the dislocation, and at the outer winding semiconduction crepe paper of enameled wire and tinned wire, the interference of shielding field intensity when the coil normally switches on, guarantee the accuracy of the signal of gathering, outmost high temperature adhesive tape, make the protection enameled wire not broken away at the pouring in-process, the paint film is not destroyed, improve the angle difference of mutual-inductor, the accuracy of ratio difference, the signal accuracy of gathering after using collection equipment is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 creative efforts.

Fig. 1 is a schematic structural view of the feedthrough electronic transformer of the present invention;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a surface structure view of the mutual inductor of FIG. 1;

fig. 5 is a shielding effect diagram of the feedthrough electronic transformer of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

In the present embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin connecting manner, or the like, which is commonly used in the prior art, and therefore, details thereof are not described in the present embodiment.

A feedthrough electronic transformer, as shown in fig. 1-2, includes a transformer coil 1 and an outlet post 2 fixed on the transformer coil 1.

As shown in fig. 3, the transformer coil includes a magnetic core 11, a buffer layer 12 coated on the surface of the magnetic core 11 and tightly attached to the magnetic core 11, a lower protective shell 13 and an upper protective shell 14 fastened to each other for protecting the magnetic core 11, an enamel wire 15 uniformly wound on the annular surfaces of the lower protective shell 13 and the upper protective shell 14, and a semi-conductive crepe paper 16 wound on the outer layer of the enamel wire 15, two circles of tinned copper wires 17 wound on the outer layer of the semi-conductive crepe paper 16, and an outlet of the tinned copper wires 17 connected in series with an initial line of the magnetic core 11. The buffer layer 12, the lower protective shell 13, the upper protective shell 14, the enameled wire 15 and the semi-conductive crepe paper 16 are all made of H-grade heat-resistant insulating materials, wherein the buffer layer 12, the lower protective shell 13, the upper protective shell 14 and the enameled wire 15 are preferably solvent-free impregnated resin. The outward flange department of protective housing 13 sets up recess 131 down, the inner edge department of going up protective housing 14 is provided with sand grip 141 for protective housing 13 and last protective housing 14 dislocation mode each other are detained fixedly down, are favorable to improving structural installation stability, and when the epoxy casting, the reduction causes the dislocation of magnetic core 11 because of receiving the impact extrusion, thereby makes enameled wire 15 impaired, ensures that the angle difference of mutual-inductor, than poor, improves the accuracy that collection equipment gathered the signal. The initial line of the enameled wire 1 is connected with the tinned copper wire 17 in series, and the tail end of the enameled wire is welded to two ends of the outlet column 2.

In this embodiment, the buffer layer 12 is a high-elasticity and high-temperature-resistant glue filling layer.

In this embodiment, referring to fig. 4, the outer layer of the tinned copper wire 17 is further wrapped with a high-temperature tape 18, the high-temperature tape 18 is wrapped around the surface of the tinned copper wire 17 with a first layer of tape 181, and then wrapped around the first layer of tape 181 with one half of the high-temperature tape 18, so as to form a second layer of tape 182.

Making the utility model discloses a pouring technology of punching electronic transformer, including following step:

step 1) assembling a transformer coil: buckling and fixing a lower protective shell 13 and an upper protective shell 14 in a mutual dislocation mode, wrapping a magnetic core 11 in the magnetic core, then filling high-elasticity and high-temperature-resistant glue solution into the magnetic core after the lower protective shell 13 and the upper protective shell 14 are buckled, fixing the magnetic core 11 after the glue solution is cooled and solidified, sequentially winding an enameled wire 15, semi-conductive crepe paper 16, a tinned copper wire 17 and high-temperature adhesive tape on the surfaces of the lower protective shell 13 and the upper protective shell 14, and welding an initial line of the enameled wire 15 and the leading-out end and the tail of the tinned copper wire 17 to the two ends of an outlet column 2 to complete the assembly of a transformer coil 1 for later use;

step 2), assembling a built-in transformer coil: assembling the mutual inductor coil 1 assembled in the step 1) with a pole for later use;

step 3) epoxy casting: preheating a built-in transformer coil for one hour at 130 ℃ in the casting process, wherein the magnetic core 11, the lower protective shell 13 and the upper protective shell 14 expand under the action of heat, eliminating the generated stress through the buffer layer 12 with high elasticity, and then performing casting epoxy to obtain a casting body;

when epoxy is poured, the impact force generated by the transformer coil is dissolved through the buffer layer, and the magnetic core 11 is not dislocated or deformed, so that the whole pouring processing is completed;

Figure 5 is a schematic view of the shielding effect,

shielding principle: the semiconductor crepe paper 16 is connected with the initial line of the enameled wire 15 in series through the tinned copper wire 17 and is welded to the negative end of the outlet column 2 to be grounded, so that a shielding layer is formed, and the mutual inductor is prevented from being interfered by an electric field when being normally electrified.

The utility model is characterized in that: the mutual inductor coil can be directly cast and molded with utmost point post, compares the structure of traditional mutual inductor coil and the influence that the pouring process produced extrusion deformation, dislocation, and foretell problem has been avoided to the mutual inductor coil of this application to guarantee the precision of secondary output, reduced the space and occupied the volume, and the cost is reduced.

The utility model has the advantages that: this punching electronic transformer fills the buffer layer that has the high elastic modulus between magnetic core and lower protective housing and last protective housing, the protection magnetic core is not by extrusion deformation, the dislocation, and at semi-conductive crepe paper of the outer winding of enameled wire and tinned wire, the interference of shielding field intensity when the coil normally circular telegram, guarantee the accuracy of the signal of gathering, outermost high temperature adhesive tape makes protection enameled wire not broken by the washing away, the paint film is not destroyed at the pouring in-process, improve the angle difference of mutual-inductor, the accuracy of ratio difference, the signal accuracy of gathering after using collection equipment is high.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a punching electronic transformer, includes the mutual-inductor coil to and fix the outlet column on the mutual-inductor coil, its characterized in that: mutual-inductor coil includes the magnetic core, and the cladding is at the magnetic core on the surface and paste the buffer layer of tight magnetic core, lower protective case and the last protective case of mutual lock joint, be used for protecting the magnetic core the annular surface of protective case and last protective case evenly twines down has the enameled wire, and the outer winding of enameled wire has semi-conductive crepe paper skin encircles two rings of tinned wire, tinned wire's the end of drawing forth and the initial line of magnetic core establish ties.

2. A feedthrough electronic transformer as recited in claim 1, wherein: the buffer layer is a high-elasticity and high-temperature-resistant glue solution filling layer.

3. A feedthrough electronic transformer as recited in claim 1, wherein: the buffer layer, the lower protective shell, the upper protective shell, the enameled wire and the semi-conductive crepe paper are all made of H-grade heat-resistant insulating materials, wherein the buffer layer, the lower protective shell, the upper protective shell and the enameled wire are made of solvent-free impregnating resin.

4. A feedthrough electronic transformer as recited in claim 1, wherein: the outer edge department of protective housing sets up the recess down, the inner fringe department of going up the protective housing is provided with the sand grip for the mutual dislocation mode of protective housing is detained fixedly down with last protective housing.

5. A feedthrough electronic transformer as recited in claim 1, wherein: the initial line of the enameled wire is connected with the tinned copper wire in series, and the tail of the enameled wire is welded to two ends of the wire outlet column.

6. A feedthrough electronic transformer as recited in claim 1, wherein: the outer winding of tinned wire has still the high temperature adhesive tape, the high temperature adhesive tape covers the first layer glue film around tinned wire surface, and the second layer adhesive tape is formed around the half that the first layer adhesive tape covered high temperature adhesive tape again.