Detachable current transformer easy to replace

Abstract

The utility model discloses a detachable current transformer easy to replace, and belongs to the technical field of current transformers, two shells are used as shells of the current transformer, a wire is arranged in each shell, the two shells are fixedly connected through a buckle to form an annular structure, and meanwhile, the two shells are fixedly connected through a buckle. The device is also provided with two elastic fixing structures, the first ends of the two elastic fixing structures are fixedly installed on the two shells respectively, the second ends of the two elastic fixing structures are arranged oppositely, and during installation, only the two shells are needed to surround a to-be-tested current carrier, and then the buckles are locked. The second ends of the two elastic fixing structures are in extrusion contact with the to-be-tested current carrier, so that the current detection device is fixed on the to-be-tested current carrier and can be disassembled by loosening the buckle during disassembly, the current detection device does not need to be fixed on the side surface of a power transformation box and does not need to use an additional fixing device, the disassembly and assembly surface is reduced during replacement operation, and the disassembly and assembly time is shortened; and the power production and transmission efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformers, and in particular relates to a detachable current transformer which is easy to replace. Background Art

[0002] In power equipment, current transformers play an important role. They can convert high current into low current for measurement and protection. When box-type transformers operate at high load for a long time, the high temperature generated will cause problems such as aging and damage of the transformers, thereby affecting the normal protection and measurement functions. Therefore, replacing the current transformers on the low-voltage side of the box-type transformers has become a normalized power maintenance and inspection work.

[0003] In the box-type transformer, the traditional current transformer is a through-type current transformer, one side of which needs to be fixedly installed on the three-phase copper busbar, and then the current carrier to be measured passes through the center of the through-type current transformer to achieve current measurement;

[0004] When replacing a current transformer, it is usually necessary to remove the three-phase copper busbar before taking out the transformer. Since the current structure of box-type transformers is developing towards intensive development, this work involves a large disassembly and assembly surface, requires a high level of skill from maintenance personnel, and has certain operational difficulties and dangers. In addition, since this work is time-consuming, long-term shutdown maintenance of equipment will also reduce the efficiency of power production and transmission. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the utility model provides a detachable current transformer that is easy to replace, so as to solve the problems in the prior art of replacing the current transformer, such as large disassembly and assembly surface, long disassembly time and reduced power production and transmission efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An easily replaceable detachable current transformer, comprising:

[0008] Two shells; each shell is provided with a wire, and two ends of a wire are arranged in two ends of the shell;

[0009] Secondary winding; the secondary winding is wound on a conductor, and the outlet terminal of the secondary winding passes through the housing where the wound conductor is located and is arranged outside;

[0010] Two pairs of buckles; one pair of buckles includes a male buckle and a female buckle, the male buckle and the female buckle of one pair of buckles are respectively mounted on the first ends of the two shells, and the male buckle and the female buckle of the other pair of buckles are respectively mounted on the second ends of the two shells;

[0011] Two retractable elastic fixing structures; one end of an elastic fixing structure is fixedly connected to one side of a shell, and the second ends of the two elastic fixing structures are arranged facing each other;

[0012] When the two pairs of buckles are fastened, the two wires are connected end to end to form a path, and the second ends of the two elastic fixing structures are squeezed into contact with the current carrier to be measured.

[0013] Preferably, an elastic fixing structure comprises:

[0014] At least one spring; a first end of the spring is fixedly mounted on a housing;

[0015] The pressure plate is fixedly connected to the second end of the spring.

[0016] Preferably, the detachable current transformer also includes two sealing gaskets, one sealing gasket is arranged at the connection of a pair of buckles, and when the male buckles of the pair of buckles pass through the sealing gasket and the female buckle to be fastened, the top surface and bottom surface of the sealing gasket are respectively squeezed into contact with the two shells.

[0017] Preferably, the shell is made of epoxy resin.

[0018] Preferably, the wire is made of ferrite.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The present application uses two shells as the shells of the current transformer, and a wire is provided in each shell. The two shells are fixedly connected to form a ring structure by a buckle. At the same time, the wires in the two shells are also connected end to end to form a loop. On this basis, the present application also provides two elastic fixing structures. The first ends of the two elastic fixing structures are respectively fixedly installed on the two shells, and the second ends are arranged facing each other. During installation, it is only necessary to use the two shells to surround the current carrier to be measured, and then lock the buckle. At this time, the second ends of the two elastic fixing structures are squeezed and contacted with the current carrier to be measured, so that the present application is fixed on the current carrier to be measured. When disassembling, the buckle can be loosened to remove it. Through the above structure, there is no need to fix the present application on the side of the transformer box, and there is no need to use bolts, nuts and other fixing devices. During the replacement operation, the disassembly surface is greatly reduced, and the loading and unloading time is reduced, thereby improving the efficiency of power production and transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the specific structure of this application;

[0022] The markings in the figure are:

[0023] 1-Upper shell; 2-Lower shell; 3-Male buckle; 4-Spring; 5-Pressure plate; 6-Sealing gasket. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, an easily replaceable detachable current transformer comprises:

[0027] An upper shell 1 and a lower shell 2; the upper shell 1 is in an "I" shape, the lower shell 2 is in a "U" shape, both the upper shell 1 and the lower shell 2 are provided with wires, and the two ends of a wire are arranged in the two ends of the shells, the upper shell 1 and the lower shell 2 are made of epoxy resin, and the wire is made of ferrite;

[0028] Secondary winding; the secondary winding is wound on the wire of the upper housing 1, and the outlet terminal of the secondary winding passes through the upper housing 1 and is arranged outside;

[0029] Two pairs of buckles; a pair of buckles includes a male buckle and a female buckle, the male buckle 3 is arranged at both ends of the upper shell 1, each male buckle 3 is provided with a first connection point, and both ends of the wire in the upper shell 1 are fixedly connected to the two first connection points respectively, and the female buckle is arranged at both ends of the lower shell 2, and a second connection point is provided in the female buckle, and both ends of the wire in the lower shell 2 are connected to the two second connection points respectively;

[0030] Two retractable elastic fixing structures; one elastic fixing structure includes three springs 4 and a pressing plate 5, the pressing plate 5 is fixedly connected to the second end of the spring 4, and the first ends of the springs 4 of the two elastic fixing structures are fixedly connected to the upper shell 1 and the lower shell 2 respectively;

[0031] Two sealing gaskets 6, one sealing gasket 6 is arranged on a female buckle, when a male buckle 3 passes through the sealing gasket 6 and a female buckle and is fastened, the top surface and the bottom surface of the sealing gasket 6 are respectively pressed and contacted with the two shells.

[0032] In this embodiment, when the two pairs of buckles are fastened, the upper shell 1 and the lower shell 2 form an annular structure, and a first connection point and a second connection point are fitted together. At this time, the two wires form a loop, and the two pressure plates 5 are squeezed into contact with the current carrier to be measured, so that the present application is fixed on the current carrier to be measured. When disassembling, the buckles can be loosened to remove it. Through the above structure, there is no need to fix the present application on the side of the transformer box, and there is no need to use fixing devices such as bolts and nuts. The disassembly and assembly surface is greatly reduced during the replacement operation, and the loading and unloading time is reduced, thereby improving the power production and transmission efficiency.

Claims

1. A detachable current transformer that is easy to replace, characterized in that: include: Two shells; each shell is provided with a wire, and two ends of a wire are arranged in two ends of the shell; Secondary winding; the secondary winding is wound on a conductor, and the outlet terminal of the secondary winding passes through the housing where the wound conductor is located and is arranged outside; Two pairs of buckles; one pair of buckles comprises a male buckle (3) and a female buckle, the male buckle (3) and the female buckle in one pair of buckles are respectively mounted on the first ends of the two shells, and the male buckle (3) and the female buckle in the other pair of buckles are respectively mounted on the second ends of the two shells; Two retractable elastic fixing structures; one end of an elastic fixing structure is fixedly connected to one side of a shell, and the second ends of the two elastic fixing structures are arranged facing each other; When the two pairs of buckles are fastened, the two shells form a ring structure, the two wires are connected to form a passage, and the second ends of the two elastic fixing structures are in compression contact with the current carrier to be measured.

2. The easily replaceable detachable current transformer according to claim 1, characterized in that: An elastic fixing structure comprises: At least one spring (4); a first end of the spring (4) is fixedly mounted on a housing; A pressure plate (5); the pressure plate (5) is fixedly connected to the second end of the spring (4).

3. The easily replaceable detachable current transformer according to claim 1, characterized in that: The detachable current transformer also includes two sealing gaskets (6), one sealing gasket (6) being arranged at the connection of a pair of buckles, and when the male buckles (3) of the pair of buckles pass through the sealing gasket (6) and the female buckle and are fastened, the top surface and the bottom surface of the sealing gasket (6) are respectively in compression contact with the two shells.

4. The easily replaceable detachable current transformer according to claim 1, characterized in that: The shell material is epoxy resin.

5. The easily replaceable detachable current transformer according to claim 1, characterized in that: The wire material is ferrite.

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