CN214624638U - Current transformer - Google Patents

Abstract

The utility model discloses a current transformer, wherein, current transformer includes mutual-inductor body and blister shell, blister shell wrap up in on the mutual-inductor body. The utility model discloses technical scheme not only can promote current transformer's leakproofness, realizes good waterproof dustproof effect, can also reduce current transformer's whole volume.

Description

Current transformer

Technical Field

The utility model relates to a low-voltage apparatus technical field, in particular to current transformer.

Background

In the process of monitoring and detecting the electric power facilities, the current transformer plays a crucial role. Most current transformers in the current market are packaged by winding a traditional adhesive tape or packaged by adopting a plastic package structure, wherein the current transformers cannot be completely sealed by winding a transformer body by the adhesive tape, coils still can be exposed in the external environment, water vapor and dust easily enter the transformer body from gaps of the adhesive tape to corrode the transformer body, the service life is shortened, and the adhesive tape is easy to degum; the plastic package can seal the current transformer body, isolate water vapor and dust and guarantee safety, but the plastic package structure is limited by the material and the process, so that the thickness and the size of the formed shell are large, and the whole volume of the current transformer is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a current transformer, when aiming at reducing the current transformer volume, improve current transformer's leakproofness.

In order to achieve the above object, the utility model provides a current transformer, including mutual-inductor body and blister shell, blister shell wrap up in on the mutual-inductor body.

Optionally, the blister shell is formed on the transformer body through a blister process to wrap the transformer body.

Optionally, the blister housing includes a base body and a covering portion, the base body has an annular groove, the covering portion is sealed and covered on the annular groove, and the mutual inductor body is accommodated in the annular groove.

Optionally, the cover part is connected with the base body in a thermal fusion mode.

Optionally, the covering part and the base body are connected in a sealing mode through glue.

Optionally, the transformer body is annular, and the shell corresponds to the annular transformer body and is a closed hollow annular structure.

Optionally, the blister housing is made of a thermoplastic material.

Optionally, the plastic housing is made of one or a combination of PVC, PP, PS, and PET.

Optionally, the thickness of the plastic suction shell is 0.14-1.0 mm.

The utility model discloses technical scheme has the blister shell through the parcel on the mutual-inductor body for current transformer realizes good sealed, and keeps having less volume. Compared with the traditional current transformer which uses the adhesive tape to wind the coil, the transformer body is packaged by the plastic uptake shell, so that the transformer is completely sealed in the plastic uptake shell and is completely isolated from the external environment, good waterproof and dustproof effects are achieved, the transformer body is prevented from being corroded by water vapor and dust, and the service life of the current transformer is further prolonged; in addition, the plastic uptake shell is wrapped and pasted on the mutual inductor body, the size of the plastic uptake shell is equivalent to that of the mutual inductor body, and compared with the existing current mutual inductor, the plastic uptake shell is packaged by using a plastic structure, so that a positioning structure and a sealing structure are omitted, and the space is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 the structures shown in the drawings without creative efforts.

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

FIG. 2 is an enlarged view taken at point I in FIG. 1;

FIG. 3 is a schematic structural diagram of the base body and the covering part of the current transformer in hot-melt connection;

FIG. 4 is an enlarged view taken at II in FIG. 3;

FIG. 5 is a schematic structural diagram of the adhesive connection of the base body and the covering part of the current transformer;

fig. 6 is an enlarged view of fig. 5 at iii.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Current transformer	210	Base body
10	Mutual inductor body	220	Covering part
				20	Plastic uptake outer casing	30	Glue

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a current transformer 1.

Specifically, the transformer body 10 is composed of a closed iron core and a coil wound around the iron core, a sealed enclosure is arranged outside the transformer body, and the current transformer 1 can convert a primary current with a large value into a secondary current with a small value through a certain transformation ratio according to the electromagnetic induction principle, so as to protect, measure and monitor power equipment.

Referring to fig. 1 to 2, fig. 1 is a schematic sectional view of an embodiment of the present invention, and fig. 2 is an enlarged view of a point i in fig. 1;

in the embodiment of the present invention, the current transformer 1 includes a transformer body 10 and a blister shell 20 wrapped on the transformer body 10.

The utility model discloses technical scheme is through adopting the plastic uptake technology shaping plastic uptake shell 20 on mutual-inductor body 10 for mutual-inductor body 10 is wrapped up in plastic uptake shell 20 completely, forms good sealed, and keeps there being less volume. Compared with the traditional current transformer 1 which adopts an adhesive tape to wind a coil, the transformer body 10 is packaged by the plastic uptake shell 20, so that the transformer is completely sealed in the plastic uptake shell 20 and is completely isolated from the external environment, good waterproof and dustproof effects are achieved, the transformer body 10 is prevented from entering water vapor and dust deposition to cause corrosion, the service life of the current transformer 1 is further prolonged, and the plastic uptake shell 20 is suitable for a complex environment and cannot be damaged after long-term use; in addition, the application of plastic uptake shell 20 parcel is in mutual-inductor body 10, and the volume is equivalent with mutual-inductor body 10, compares in current transformer 1 and uses the plastic construction encapsulation, and thickness is thinner, and the size is littleer, and whole volume reduces greatly. In addition, the plastic structure packaged mutual inductor body 10 needs to be completely sealed, glue filling or a sealing structure is needed to be added, for example, a sealing ring is added, the plastic shell 20 is adopted for packaging, the plastic shell 20 is attached to the mutual inductor body 10, and the sealing structure is not needed to be arranged, so that the installation space is reduced, and the size is reduced accordingly.

Referring to fig. 1 and 2, the blister shell 20 can be formed on the transformer body 10 through a blister process, and the package is attached to the whole transformer body 10, so that the transformer body 10 is completely sealed in the blister shell 20 and isolated from the external environment, and the volume of the transformer body is equivalent to that of the transformer body 10.

Alternatively, referring to fig. 3 to 6, the blister housing 20 may also include two parts, including a base 210 and a cover 220, where the base 210 forms an annular groove (not labeled), the shape of the annular groove matches with the transformer body 10, and the size of the inner space of the annular groove is designed to be in transition fit with the transformer body 10, so that the transformer body 10 is just accommodated in the annular groove and will not become loose, thereby avoiding the existing plastic package structure from further providing a positioning structure and a mounting structure for fixing the transformer body 10, and thus saving the mounting space. Accordingly, the shape of the covering part 220 corresponds to the base 210.

In order to make mutual-inductor body 10 sealed in blister shell 20, realize good waterproof and dustproof effect, mutual-inductor body 10 inlays behind the ring channel of base member 210, close the portion 220 lid with the lid and fit on base member 210, thereby the portion 220 that closes can fuse through the heating with base member 210 and be even as an organic whole, wherein, the partial length direction that the portion 220 that closes is connected with base member 210 of lid slightly surpasss base member 210, make base member 210 and the hot fusion of portion 220 that closes more abundant, can not loosen under the exogenic action and take off.

Optionally, the covering part 220 and the base body 210 can also be bonded and connected through glue 30, the base body 210 and the covering part 220 can be connected together by adopting the glue 30 for bonding, so that a sealing effect is achieved, meanwhile, the cost can be saved, in order to enable the mutual inductor body 10 to be just limited in the accommodating cavity formed by the base body 210 and the covering part 220 after the base body 210 and the covering part 220 are connected, and the length of the covering part 220 at this time can be the same as that of the base body 210.

Further, the transformer body 10 is annular, the shape of the blister shell 20 corresponds to the transformer body 10, and the transformer body 10 can be a closed hollow annular structure, the transformer body 10 is accommodated in the hollow annular structure, and the transformer body 10 and the blister shell 20 are in hollow transition fit, so that a gap between the transformer body 10 and the blister shell 20 is reduced, the blister shell 20 is more easily attached to the transformer body 10, and the overall volume of the current transformer 1 is reduced.

It can be understood that the blister shell 20 is made of thermoplastic material, so that when the blister shell 20 is divided into the base 210 and the covering portion 220, the covering portion 220 and the base 210 can be fused by heating, and thus are connected into a whole. Specifically, the plastic housing 20 may be made of PVC (polyvinyl chloride), PP (polypropylene), PS (polystyrene), or PET (polyethylene terephthalate), or a combination thereof. Wherein, through several kinds of thermoplastic material heating fusion, it melts and mixes after the liquid form and forms new mixture, can utilize its similar compatible characteristic to make these similar material's material can be better the combination adsorb together, and the comprehensive properties of shell is good, has the characteristic of various materials concurrently, and for example toughness and compactness are better, and life is more permanent.

Wherein, in order to further reduce the whole volume of the current transformer 1, the thickness of the plastic suction shell 20 can be 0.14-1.0 mm. The mature plastic uptake process can use extremely thin parent metal nowadays, and a product with very thin thickness and even thickness is formed, the embodiment of the utility model selects the forming thickness to be within the interval of 0.14-1.0 mm, wherein, when the plastic uptake shell 20 is 0.14mm thick, the plastic uptake shell 20 has very good elastic deformation capacity, can be easily attached and wrapped on the mutual inductor body 10, so that the current mutual inductor 1 can be formed into a minimum volume; when the blister shell is 1mm thick, the blister shell keeps thin thickness at this moment, still has sufficient intensity, is difficult to damage under the exogenic action or scraping. Certainly, in order to make plastic uptake shell 20 obtain optimal comprehensive properties, the embodiment of the utility model provides a can be preferred thickness be 0.5mm or be 0.6mm, so can make plastic uptake shell 20 obtain when thinner thickness, have sufficient intensity and elastic force simultaneously, even make current transformer 1 keep less volume, guaranteed current transformer 1's leakproofness and security again.

Further, there is the wiring end that stretches out blister shell 20 on the mutual-inductor body 10, the wiring end can be connected with external circuit electricity, wherein, blister shell 20 is formed with the wiring hole with the position that the wiring end combines, the wiring end is worn out from the wiring hole, for the hole that makes wiring hole and wiring end junction does not influence blister shell 20's leakproofness, prevent that steam and dust among the external environment from getting into blister shell 20 from the hole of wiring hole and wiring end in, can be sealed at the junction point of wiring end and blister shell 20, perhaps further hot melt is sealed. The hot melt seal at the connection point may be made of the same material as the blister housing 20 or a different material.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (9)

1. A current transformer, comprising:

a transformer body; and

the plastic uptake shell wraps the mutual inductor body.

2. The current transformer of claim 1, wherein the blister shell is formed on the transformer body by a blister process to encapsulate the transformer body.

3. The current transformer of claim 1, wherein the blister housing comprises a base and a cover, the base having an annular groove, the cover sealingly covering the annular groove, the transformer body being received in the annular groove.

4. The current transformer of claim 3, wherein the cover portion is thermally fused to the base.

5. The current transformer of claim 3, wherein the cover portion is sealingly connected to the base by glue.

6. The current transformer according to any one of claims 1 to 5, wherein the transformer body is ring-shaped, and the enclosure is a closed hollow ring-shaped structure corresponding to the ring-shaped transformer body.

7. The current transformer of any one of claims 1-5, wherein the blister housing is made of a thermoplastic material.

8. The current transformer of claim 7, wherein the blister housing is made of one of PVC, PP, PS, or PET.

9. The current transformer of claim 1, wherein the thickness of the blister shell is 0.14-1.0 mm.

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