CN209929090U

CN209929090U - Current transformer

Info

Publication number: CN209929090U
Application number: CN201920536918.6U
Authority: CN
Inventors: 潘坤; 王志亮; 邓正洋
Original assignee: SHEYANG WEILONG ELECTRIC CO Ltd
Current assignee: SHEYANG WEILONG ELECTRIC CO Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-10
Anticipated expiration: 2029-04-19

Abstract

The utility model discloses a current transformer belongs to electric power system and sends electric power technical field, including the mutual-inductor body, one side of mutual-inductor body is provided with the wiring board, install first wiring bolt and second wiring bolt on the wiring board, first wiring bolt and second wiring bolt symmetry set up the one side of keeping away from the mutual-inductor body at the wiring board, the mutual-inductor body is close to one side fastening mounting of wiring board and has the protective housing, the concave mounting groove that is equipped with in one side that the protective housing is close to the wiring board, the protective housing passes through the mounting groove cover to be established on the wiring board, two entrance holes that communicate with the mounting groove are seted up to the bottom symmetry of protective. The utility model provides a current transformer because of the exposed not good enough problem of security that leads to of current joint department, have simple structure and safe practical characteristics.

Description

Current transformer

Technical Field

The utility model relates to a current transformer.

Background

The current transformer is an important device for electric energy metering and relay protection in an electric power system. Power systems have strict requirements on safety and reliability of long-term operation. Current transformers commonly used at present mainly comprise an electromagnetic current transformer and an optical fiber current transformer, a current connecting joint on the current transformer is a bolt in threaded connection with the upper side surface of a shell, and when wiring is conducted, the bolt is firstly unscrewed, a wire is wound on the bolt, and then the bolt is screwed. When the current transformer is used, a bolt for fixing a current joint is directly exposed outside, certain problems exist in the installation performance of the current transformer, and other structures for fixing the connecting wire are not arranged on the current transformer, so that if external force is carelessly applied to the connecting wire, the acting force can be directly applied to the connecting part of the connecting wire and the bolt, the problem that the connecting wire is easy to break is caused, and therefore the current transformer is needed to be designed urgently.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to solve the shortcoming that exists among the prior art, if: when the current transformer is used, a bolt for fixing a current connector is directly exposed outside, certain problems exist in the installation performance of the current transformer, and other structures for fixing the connecting wire are not arranged on the current transformer, so that if external force acts on the connecting wire carelessly, the acting force can directly act on the connecting part of the connecting wire and the bolt, and the problem that the connecting wire is easy to break is caused.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a current transformer, includes the mutual-inductor body, one side of mutual-inductor body is provided with the wiring board, install first wiring bolt and second wiring bolt on the wiring board, first wiring bolt and second wiring bolt symmetry set up the one side of keeping away from the mutual-inductor body at the wiring board, one side fastening installation that the mutual-inductor body is close to the wiring board has the protective housing, the concave mounting groove that is equipped with in one side that the protective housing is close to the wiring board, the protective housing passes through the mounting groove cover and establishes on the wiring board, two entrance holes with the mounting groove intercommunication are seted up to the bottom symmetry of protective housing, every equal bilateral symmetry in the entrance hole is concave to be equipped with two centre gripping grooves, every all there is the clamp splice, two through spring coupling in the centre gripping inslot the equal concave notch that is equipped with in one side.

Preferably, bilateral symmetry fixed mounting has two inserted blocks on the protective housing, the mutual-inductor body is close to one side symmetry concave connection groove that is used for cup jointing the inserted block that is equipped with two of wiring board, every all install set screw on the inserted block.

Preferably, two open holes communicated with the mounting groove are symmetrically formed in the protective shell, and the positions of the two open holes correspond to the first wiring bolt and the second wiring bolt respectively.

Preferably, the bottom fixed mounting of mutual-inductor body has the mounting base, two construction bolts are installed to bilateral symmetry on the mounting base.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model realizes the protection of the wiring board through the protective shell, the insert block and the positioning screw, solves the problem that the first wiring bolt and the second wiring bolt are directly exposed outside, and simultaneously conveniently controls the screwing and unscrewing of the first wiring bolt and the second wiring bolt through the hole, thereby having the characteristics of simple structure and convenient disassembly and assembly;

2. the utility model discloses a wire inlet hole, spring, clamp splice and notch press from both sides tightly the electric current wiring, can reserve the electric current wiring of certain length in the inside of protective housing, when the outside atress of working a telephone switchboard, can stimulate the wiring and outwards slide along the wire inlet hole, the elasticity messenger of two springs is tight with the wiring clamp, consequently receives great frictional force when sliding, can cushion the external force that the wiring received to reduce the influence that the electric current connects and receive in the junction of first wiring bolt and second wiring bolt.

Drawings

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

fig. 2 is an enlarged view of a structure of fig. 1.

In the figure: the transformer comprises a transformer body 1, a mounting base 2, a mounting bolt 3, a wiring board 4, a hole 5, a first wiring bolt 6, a second wiring bolt 7, a protective shell 8, an insertion block 9, a positioning screw 10, a wire inlet hole 11, a spring 12, a clamping block 13 and a notch 14.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-2, a current transformer comprises a transformer body 1, a wiring board 4 is arranged on one side of the transformer body 1, a first wiring bolt 6 and a second wiring bolt 7 are arranged on the wiring board 4, the first wiring bolt 6 and the second wiring bolt 7 are symmetrically arranged on one side of the wiring board 4 far away from the transformer body 1, a protective shell 8 is tightly fixed on one side of the transformer body 1 close to the wiring board 4, a mounting groove is concavely arranged on one side of the protective shell 8 close to the wiring board 4, the protective shell 8 is sleeved on the wiring board 4 through the mounting groove, two wire inlet holes 11 communicated with the mounting groove are symmetrically arranged at the bottom of the protective shell 8, the protective shell 8 is made of transparent plastic material and has an insulating effect, wires enter the mounting groove from the two wire inlet holes 11 and are connected with the first wiring bolt 6 and the second wiring bolt 7, and the protection of the wiring board 4 is realized, the problem that the first wiring bolt 6 and the second wiring bolt 7 are directly exposed outside is solved, the safety of the mutual inductor body 1 in use is improved, and the mutual inductor has the characteristics of simple structure and convenience in disassembly and assembly, two clamping grooves are symmetrically and concavely arranged in each wire inlet hole 11 from left to right, and each clamping groove is connected with a clamping block 13 through a spring 12;

it should be noted that a certain length of current connection wire can be reserved in the protective shell 8, when the external connection wire is stressed, the connection wire can be pulled to slide outwards along the wire inlet hole 11, and the elastic force of the two springs 12 causes the clamping block 13 to clamp the connection wire, so that the external force applied to the connection wire can be buffered by a large friction force during sliding, and the influence of the current connector on the connection position of the first connection bolt 6 and the second connection bolt 7 can be reduced;

notches 14 are concavely arranged on the opposite sides of the two clamping blocks 13, and anti-skid grains are arranged on the inner wall of each notch 14;

it should be noted that the two clamping blocks 13 clamp the wiring, the notch 14 can match the shape of the wiring, the contact area between the clamping blocks 13 and the wiring is increased, and the friction force is increased through the anti-skid threads, so that the stability of clamping the wiring is improved;

two insertion blocks 9 are symmetrically and fixedly mounted on the protective shell 8 left and right, two connecting grooves for sleeving the insertion blocks 9 are symmetrically and concavely arranged on one side, close to the wiring board 4, of the mutual inductor body 1, and a positioning screw 10 is mounted on each insertion block 9;

it should be noted that, two insertion blocks 9 are inserted into the connection groove, and the insertion blocks 9 are fixed by installing two positioning screws 10, so as to implement the installation of the protective shell 8 on the transformer body 1, a connection substrate for connecting the positioning screws 10 can be bonded in the connection groove in advance through glue, the connection substrate is preferably made of insulating plastic, a threaded blind hole matched with the positioning screw 10 is concavely arranged on the connection substrate, and the fastening installation of the protective shell 8 on the transformer body 1 is implemented by installing the positioning screw 10 on the connection substrate;

two open holes 5 communicated with the mounting groove are symmetrically formed in the protective shell 8, and the positions of the two open holes 5 correspond to the first wiring bolt 6 and the second wiring bolt 7 respectively;

it should be noted that the first and second connection bolts 6 and 7 can be unscrewed and screwed by the screwdriver through the opening 5, and the operation can be performed without detaching the protective shell 8, which is more convenient;

the bottom of the mutual inductor body 1 is fixedly provided with a mounting base 2, and the mounting base 2 is provided with two mounting bolts 3 which are bilaterally symmetrical;

it should be noted that, through the cooperation of the mounting base 2 and the two mounting bolts 3, the mutual inductor body 1 is convenient to disassemble and assemble, and the installation structure has the characteristics of stability in installation and convenience in disassembly and assembly.

Claims

1. A current transformer comprises a transformer body (1), wherein a wiring board (4) is arranged on one side of the transformer body (1), a first wiring bolt (6) and a second wiring bolt (7) are installed on the wiring board (4), the first wiring bolt (6) and the second wiring bolt (7) are symmetrically arranged on one side, away from the transformer body (1), of the wiring board (4), the current transformer is characterized in that a protective shell (8) is tightly installed on one side, close to the wiring board (4), of the transformer body (1), a mounting groove is concavely arranged on one side, close to the wiring board (4), of the protective shell (8), the protective shell (8) is sleeved on the wiring board (4) through the mounting groove, two wire inlet holes (11) communicated with the mounting groove are symmetrically formed in the bottom of the protective shell (8), two clamping grooves are symmetrically concavely formed in the left side and the right side of each wire inlet hole (11), each clamping groove is internally connected with a clamping block (13) through a spring (12), one side, opposite to the clamping block (13), of each clamping block is concavely provided with a notch (14), and each anti-skidding line is arranged on the inner wall of each notch (14).

2. The current transformer according to claim 1, wherein two insertion blocks (9) are symmetrically and fixedly mounted on the protective shell (8) from left to right, two connection grooves for sleeving the insertion blocks (9) are symmetrically and concavely formed on one side of the transformer body (1) close to the wiring board (4), and a positioning screw (10) is mounted on each insertion block (9).

3. The current transformer according to claim 2, wherein the protective shell (8) is symmetrically provided with two openings (5) communicated with the mounting groove, and the positions of the two openings (5) correspond to the first wiring bolt (6) and the second wiring bolt (7) respectively.

4. The current transformer according to claim 3, characterized in that a mounting base (2) is fixedly mounted at the bottom of the transformer body (1), and two mounting bolts (3) are symmetrically mounted on the mounting base (2) from left to right.