CN214012668U

CN214012668U - Current transformer

Info

Publication number: CN214012668U
Application number: CN202023063753.7U
Authority: CN
Inventors: 余子平; 张乃强; 李辉鸿; 王莹
Original assignee: Zhejiang Anxin Electric Co ltd
Current assignee: Zhejiang Anxin Electric Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-20
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a current transformer relates to the current transformer field, including first shell and second shell, first shell and second shell symmetric distribution, the standing groove has all been seted up at one side middle part that first shell and second shell are close to each other, the standing groove sets up to the loop configuration, the bottom of first shell and second shell is provided with the bottom plate, the equal fixedly connected with L shape connecting block in the bottom middle part of the first shell of bottom plate and the second shell. The utility model discloses a bottom at first shell and second shell is provided with L shape connecting block, and L shape connecting block passes through spacing spout and is connected with the bottom plate for first shell and second shell dismouting maintenance of being convenient for is connected through coupling assembling between placing the winding on box and the iron core, will place the box through locating plate and constant head tank simultaneously and spacing on first shell and second shell, makes to place box convenient to detach and change.

Description

Current transformer

Technical Field

The utility model relates to a current transformer field, in particular to current transformer.

Background

The current transformer is an instrument for converting a large primary side current into a small secondary side current according to the electromagnetic induction principle to measure, and consists of a closed iron core and a winding, wherein the primary side winding has few turns and is connected in a circuit of the current to be measured in series.

Therefore, all current of a line always flows through the current transformer, the number of turns of the secondary side winding is large, the secondary side winding is connected in series in the measuring instrument and the protection loop, and the secondary side loop of the current transformer is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection loop is small, and the working state of the current transformer is close to a short circuit. The current transformer converts a large current on the primary side into a small current on the secondary side for measurement, and the secondary side can not be opened.

The detection chip on the current transformer is fixed in the shell, so that the current transformer is inconvenient to disassemble and maintain, and the current transformer is complex to disassemble and assemble by fixedly connecting the two shells through a plurality of locking bolts. Therefore, it is necessary to invent a current transformer to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a current transformer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the current transformer comprises a first shell and a second shell, wherein the first shell and the second shell are symmetrically distributed, the middle parts of one sides, close to each other, of the first shell and the second shell are respectively provided with a placing groove, the placing grooves are arranged to be of annular structures, the bottoms of the first shell and the second shell are respectively provided with a bottom plate, the middle parts of the bottom ends of the first shell and the second shell of the bottom plate are respectively and fixedly connected with an L-shaped connecting block, the two L-shaped connecting blocks are matched to form a limiting sliding block, the middle part of the upper surface of the bottom plate is provided with a limiting sliding groove, the two L-shaped connecting blocks are respectively positioned in the limiting sliding grooves, the top ends of the first shell and the second shell are connected with a placing box in an attaching mode, two ends of the lower surface of the placing box are respectively and fixedly connected with a positioning plate, two sides of the top ends of the first shell and the second shell are respectively provided with a positioning groove, and the positioning plates are matched with the positioning grooves, the placing box is connected with the first shell and the second shell through the connecting assembly.

Preferably, both sides of the upper ends of the first shell and the second shell are provided with threaded holes, and the threaded holes in the first shell and the second shell are fixedly connected through locking bolts.

Preferably, the inside of standing groove is provided with the iron core, the both ends of iron core have all twined the winding, the winding passes through the connecting wire and is connected with coupling assembling electricity.

Preferably, coupling assembling includes the attaching plate, the upper surface of attaching plate passes through buffer spring and places the box and be connected, the equal fixedly connected with electric touch connector in lower surface both ends of attaching plate.

Preferably, the lower part of the attaching plate is provided with a connecting block, the connecting block is fixed on the top end of the iron core, and the two connecting blocks are respectively connected with the two windings through connecting wires.

Preferably, slots are formed in two sides of the top end of the connecting block and are matched with the electric contact connectors.

The utility model discloses a technological effect and advantage:

the utility model discloses a bottom at first shell and second shell is provided with L shape connecting block, and L shape connecting block passes through spacing spout and is connected with the bottom plate for first shell and second shell dismouting maintenance of being convenient for is connected through coupling assembling between placing the winding on box and the iron core, will place the box through locating plate and constant head tank simultaneously and spacing on first shell and second shell, makes to place box convenient to detach and change.

Drawings

Fig. 1 is a schematic side-sectional view of the overall structure of the present invention.

Fig. 2 is a schematic sectional view of the overall structure of the present invention.

Fig. 3 is a schematic sectional view of the connection assembly structure of the present invention.

In the figure: 1. a first housing; 2. a second housing; 3. a placement groove; 4. a base plate; 5. an L-shaped connecting block; 6. a limiting chute; 7. placing the box; 8. positioning a plate; 9. positioning a groove; 10. a connecting assembly; 11. a threaded hole; 12. an iron core; 13. a winding; 14. attaching a plate; 15. a buffer spring; 16. an electrical contact terminal; 17. connecting blocks; 18. and (4) a slot.

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 work belong to the protection scope of the present invention.

The utility model provides a current transformer as shown in figures 1-3, as shown in figure 1, comprising a first shell 1 and a second shell 2, wherein the first shell 1 and the second shell 2 are symmetrically distributed, a placement groove 3 is arranged at the middle part of one side of the first shell 1 and the second shell 2, the placement groove 3 is arranged in an annular structure, the bottom parts of the first shell 1 and the second shell 2 are provided with a bottom plate 4, the middle parts of the bottom ends of the first shell 1 and the second shell 2 of the bottom plate 4 are fixedly connected with L-shaped connecting blocks 5, the two L-shaped connecting blocks 5 are matched to form a limiting slide block, the middle part of the upper surface of the bottom plate 4 is provided with a limiting slide groove 6, the two L-shaped connecting blocks 5 are arranged inside the limiting slide groove 6, so that the first shell 1 and the second shell 2 can be rapidly installed, the top ends of the first shell 1 and the second shell 2 are connected with a placement box 7, the two ends of the lower surface of the placement box 7 are fixedly connected with positioning plates 8, constant head tank 9 has all been seted up to the top both sides of first shell 1 and second shell 2, locating plate 8 and constant head tank 9 looks adaptation for it is stable to place the installation of box 7, places box 7 and connects first shell 1 and second shell 2 through coupling assembling 10.

As shown in fig. 2, threaded holes 11 are formed in both sides of the upper ends of the first housing 1 and the second housing 2, the threaded holes 11 in the first housing 1 and the second housing 2 are fixedly connected through locking bolts, so that the connection stability of the first housing 1 and the second housing 2 is improved, an iron core 12 is arranged inside the placing groove 3, windings 13 are wound on both ends of the iron core 12, and the windings 13 are electrically connected with the connecting assembly 10 through connecting wires.

As shown in fig. 3, coupling assembling 10 includes attaching plate 14, attaching plate 14's upper surface passes through buffer spring 15 and is connected with placing box 7, buffer spring 15's setting makes electrical contact 16 on attaching plate 14 can closely peg graft with slot 18, the equal fixedly connected with electrical contact 16 in attaching plate 14's the lower surface both ends, attaching plate 14's below is provided with connecting block 17, connecting block 17 is fixed on iron core 12's top, two windings 13 are connected through the connecting wire respectively to two connecting blocks 17, slot 18 has all been seted up to connecting block 17's top both sides, slot 18 and electrical contact 16 looks adaptation, through such setting, make winding 13 can be connected with the component electricity of placing in the box 7, make and place box 7 convenient to detach and change simultaneously.

The utility model discloses the theory of operation:

the present apparatus is installed by first winding the two windings 13 around the outside of the core 12, then placing the core 12 in the first housing 1, the placing box 7 is then placed on the upper end of the first casing 1, so that the electrical contacts 16 on the abutment plate 14 are inserted into the slots 18 on the connection block 17, then the second shell 2 is attached to one side of the first shell 1, the positioning grooves 9 on the first shell 1 and the second shell 2 are matched to limit the positioning plate 8 on the placing box 7, and further limit and fix the placing box 7, then through two locking bolt with

first shell

1 and 2 fixed connection of second shell, the L shape connecting block 5 cooperation on first shell 1 and the second shell 2 this moment forms spacing slider, pegs graft spacing spout 6 on bottom plate 4 with two L shape connecting blocks 5 again, with

first shell

1 and 2 spacing fixed of second shell, this device installation is accomplished this moment.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. Current transformer, including first shell (1) and second shell (2), its characterized in that: the first shell (1) and the second shell (2) are symmetrically distributed, a placing groove (3) is formed in the middle of one side, close to each other, of each of the first shell (1) and the second shell (2), the placing groove (3) is of an annular structure, a bottom plate (4) is arranged at the bottom of each of the first shell (1) and the second shell (2), an L-shaped connecting block (5) is fixedly connected to the middle of the bottom end of each of the first shell (1) and the second shell (2) of each of the bottom plates (4), a limiting sliding groove (6) is formed in the middle of the upper surface of each of the bottom plates (4), the two L-shaped connecting blocks (5) are located inside the limiting sliding grooves (6), a placing box (7) is connected to the top ends of the first shell (1) and the second shell (2) in an attaching mode, and positioning plates (8) are fixedly connected to the two ends of the lower surface of the placing box (7), constant head tank (9) have all been seted up to the top both sides of first shell (1) and second shell (2), locating plate (8) and constant head tank (9) looks adaptation, place box (7) and pass through coupling assembling (10) and connect first shell (1) and second shell (2).

2. The current transformer of claim 1, wherein: threaded holes (11) are formed in two sides of the upper end of the first shell (1) and the upper end of the second shell (2), and the threaded holes (11) in the first shell (1) and the second shell (2) are fixedly connected through locking bolts.

3. The current transformer of claim 2, wherein: the inside of standing groove (3) is provided with iron core (12), winding (13) have all been twined at the both ends of iron core (12), winding (13) are connected through connecting wire and coupling assembling (10) electricity.

4. The current transformer of claim 3, wherein: coupling assembling (10) are including attaching plate (14), the upper surface of attaching plate (14) passes through buffer spring (15) and places box (7) and be connected, the equal fixedly connected with electric contact joint (16) in lower surface both ends of attaching plate (14).

5. The current transformer of claim 4, wherein: the below of attaching plate (14) is provided with connecting block (17), connecting block (17) are fixed on the top of iron core (12), two connecting block (17) are respectively through connecting wire connection two windings (13).

6. The current transformer of claim 5, wherein: slots (18) are formed in the two sides of the top end of the connecting block (17), and the slots (18) are matched with the electric contact connectors (16).