CN212542152U

CN212542152U - Residual current transformer

Info

Publication number: CN212542152U
Application number: CN202021795078.4U
Authority: CN
Inventors: 张孝俊; 刘名才
Original assignee: Anhui Instrument Transformer Co ltd
Current assignee: Anhui Instrument Transformer Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-02-12
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a residual current transformer relates to the power protection equipment field, and the insulating technology to current residual current transformer existence is complicated, and insulating effect is poor, and work efficiency is low, poor stability's problem, the scheme as follows now proposes, and it includes magnetic core, its magnetic core is cyclic annular, magnetic core lateral wall winding has the coil, the lateral wall that magnetic core was kept away from to the coil is provided with the insulating sponge piece, one side fixed mounting that the insulating sponge piece kept away from the coil has the insulating boot, one side fixed mounting that the insulating boot is close to the insulating sponge piece has spacing fixture block, one side that the insulating boot kept away from the insulating sponge piece is provided with the protecting crust, the protecting crust matches with the insulating boot, the protecting crust uses the axis of magnetic core to be the symmetric distribution for the symmetry axis. The utility model discloses novel structure, and the leakproofness is high, and is insulating effectual, avoids non professional to dismantle at will, and stability and security are high.

Description

Residual current transformer

Technical Field

The utility model relates to a power protective equipment field especially relates to a residual current transformer.

Background

Residual current is commonly called leakage current, and when the residual current changes, it is shown that electrified conductor is destroyed to ground insulation, can lead to accidents such as electric fire, equipment damage, personal electric shock, for avoiding this type of accident to take place, utilizes usually to detect the residual current link and starts protection device tripping operation to prevent to take place to electrocute and the conflagration that ground arc triggered, detection device commonly used at present is residual current transformer mostly.

The residual current transformer used in the current market still has the defects in the using process, the insulation process is complex, the insulation effect is poor, the required labor cost is high, the working efficiency is low, and the stability is poor, so that the residual current transformer is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of residual current transformer, it is complicated to have solved the insulating technology that current residual current transformer exists, and insulating effect is poor, and work efficiency is low, the poor problem of stability.

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

a residual current transformer comprises a magnetic conductive iron core, wherein the magnetic conductive iron core is annular, a coil is wound on the side wall of the magnetic conductive iron core, an insulating sponge sheet is arranged on the side wall of the coil far away from the magnetic conductive iron core, an insulating cover is fixedly arranged on one side of the insulating cover far away from the coil, a limiting clamping block is fixedly arranged on one side of the insulating cover close to the insulating sponge sheet, a protective shell is arranged on one side of the insulating cover far away from the insulating sponge sheet and matched with the insulating cover, the protective shell is symmetrically distributed by taking the central axis of the magnetic conductive iron core as a symmetry axis, fixed blocks are fixedly arranged on the side wall of the protective shell, connecting bolts are rotatably connected with the fixed blocks through threads, nuts are mounted on the side wall of one end, close to the fixed blocks, of the connecting bolts through threads, and a fixed rod, and a clamping groove is formed in one end, close to the fixed rod, of the clamping plate.

Preferably, dead lever and joint plate all are the L type, the joint plate runs through the draw-in groove, the joint plate all matches with draw-in groove and dead lever.

Preferably, the insulating sponge pieces and the insulating cover are symmetrically distributed by taking the central axis of the magnetic iron core as a symmetry axis, the tangent planes of the insulating sponge pieces and the insulating cover are in a smooth U shape, and the insulating sponge pieces and the insulating cover are matched with the magnetic iron core.

Preferably, the insulating sponge piece, the insulating cover and the protective shell are all consistent with the central axis of the magnetic conducting iron core, and the insulating sponge piece, the insulating cover and the protective shell are all annular.

Preferably, the insulating sponge piece, the insulating cover and the side wall of the protective shell are provided with wire grooves which are fixedly matched, the coil penetrates through the wire grooves, and the wire grooves are matched with the coil.

Preferably, the limiting clamping block penetrates through the insulating sponge sheet, and the limiting clamping block is matched with the coil and the magnetic conduction iron core.

The utility model has the advantages that:

carry out abundant contact through set up insulating sponge piece and coil and magnetic core in the insulating boot, improve the leakproofness, carry out dual insulation, promote insulating effect, set up joint board and dead lever and fixed block, connecting bolt and nut and fix the protecting crust, optimize fixed connection's stability, avoid non professional to dismantle at will, increase its security.

To sum up, the device leakproofness is high, and is insulating effectual, avoids non-professional to dismantle at will, and stability and security are high.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

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

Fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 1 according to the present invention.

Reference numbers in the figures: 1. a magnetically permeable iron core; 2. a coil; 3. an insulating sponge sheet; 4. an insulating cover; 5. a limiting clamping block; 6. a protective shell; 7. fixing the rod; 8. a card slot; 9. a fixed block; 10. a connecting bolt; 11. a nut; 12. a wire slot; 13. the joint board.

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.

Referring to fig. 1-3, a residual current transformer comprises a magnetic conductive iron core 1, wherein the magnetic conductive iron core 1 is annular, a coil 2 is wound on the side wall of the magnetic conductive iron core 1, an insulating sponge sheet 3 is arranged on the side wall of the coil 2 away from the magnetic conductive iron core 1, an insulating cover 4 is fixedly arranged on one side of the insulating sponge sheet 3 away from the coil 2, a limiting fixture block 5 is fixedly arranged on one side of the insulating cover 4 close to the insulating sponge sheet 3, a protective shell 6 is arranged on one side of the insulating cover 4 away from the insulating sponge sheet 3, the protective shell 6 is matched with the insulating cover 4, the protective shell 6 is symmetrically distributed by taking the central axis of the magnetic conductive iron core 1 as the symmetry axis, fixed blocks 9 are fixedly arranged on the side wall of the protective shell 6, two fixed blocks 9 are in threaded rotation connection with connecting bolts 10, nuts 11 are in threaded installation on the side wall, one side of the protective shell 6, which is far away from the fixed block 9, is respectively and fixedly provided with a fixed rod 7 and a clamping plate 13, one end of the clamping plate 13, which is close to the fixed rod 7, is provided with a clamping groove 8, the fixed rod 7 and the clamping plate 13 are both in an L shape, the clamping plate 13 penetrates through the clamping groove 8, the clamping plate 13 is matched with the clamping groove 8 and the fixed rod 7, the insulating sponge sheets 3 and the insulating covers 4 are symmetrically distributed by taking the central axis of the magnetic conductive iron core 1 as a symmetry axis, the tangent planes of the insulating sponge sheets 3 and the insulating covers 4 are in a smooth U shape, the insulating sponge sheets 3 and the insulating covers 4 are matched with the magnetic conductive iron core 1, the insulating sponge sheets 3, the insulating covers 4 and the protective shell 6 are all consistent with the central axis of the magnetic conductive iron core 1, the insulating sponge sheets 3, the insulating covers 4 and the protective shell 6 are all in an annular shape, the side walls of, the wire casing 12 is fixed and matched, the coil 2 penetrates through the wire casing 12, the wire casing 12 is matched with the coil 2, the limiting clamping block 5 penetrates through the insulating sponge sheet 3, and the limiting clamping block 5 is matched with the coil 2 and the magnetic iron core 1.

When the residual current transformer is used, firstly, the coil 2 is matched with the magnetic conductive iron core 1, then the coil 2 is uniformly wound on the magnetic conductive iron core 1, after the winding is finished, the insulating sponge sheet 3 is matched with the insulating cover 4, the end point of the coil 2 is matched with the wire slots 12 on the insulating sponge sheet 3 and the insulating cover 4, then the insulating sponge sheet 3 and the insulating cover 4 are sleeved on the magnetic conductive iron core 1 uniformly wound with the coil 2, the insulating sponge sheet 3 is positioned at one side close to the coil 2, the limiting clamping blocks 5 on the insulating sponge sheet 3 and the insulating cover 4 are matched with the coil 2 and the magnetic conductive iron core 1, the limiting clamping blocks 5 are clamped with the coil 2 and the magnetic conductive iron core 1, the insulating sponge sheet 3 and the insulating cover 4 are clamped with the coil 2 and the magnetic conductive iron core 1, the end point of the coil 2 penetrates through the wire slots 12 through the limiting clamping blocks 5, and then the protective shell 6 is matched with the insulating sponge sheet 3 and the insulating cover, make wire casing 12 on the protecting crust 6 match with the extreme point of coil 2, make joint board 13 and dead lever 7 match, with protecting crust 6 suit on insulating boot 4, run through draw-in groove 8 in dead lever 7 with joint board 13, make joint board 13 and dead lever 7 joint, match two fixed blocks 9 simultaneously, make connecting bolt 10 run through fixed block 9, and rotate nut 11 screw thread as for connecting bolt 10 screw fixation, make two protecting crust pass through joint board 13 and dead lever 7 and fixed block 9, connecting bolt 10 and nut 11 are connected, and make 2 extreme points of coil run through wire casing 12 on protecting crust 6, accomplish the equipment promptly, connect this residual current transformer fixed mounting in demand position, can use, after the use, operate with installation and combination order opposite, disassemble this residual current transformer can.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The residual current transformer comprises a magnetic conduction iron core (1) and is characterized in that the magnetic conduction iron core (1) is annular, a coil (2) is wound on the side wall of the magnetic conduction iron core (1), an insulating sponge sheet (3) is arranged on the side wall, far away from the magnetic conduction iron core (1), of the coil (2) of the insulating sponge sheet (3), an insulating cover (4) is fixedly arranged on one side, far away from the coil (2), of the insulating cover (3), a limiting clamping block (5) is fixedly arranged on one side, close to the insulating sponge sheet (3), of the insulating cover (4), a protective shell (6) is arranged on one side, far away from the insulating sponge sheet (3), the protective shell (6) is matched with the insulating cover (4), the protective shell (6) is symmetrically distributed by taking the central axis of the magnetic conduction iron core (1) as a symmetric axis, and a fixing block (9) is fixedly arranged on the side wall, two fixed block (9) screw thread rotates and is connected with connecting bolt (10), connecting bolt (10) are close to the equal threaded mounting of one end lateral wall of fixed block (9) and have nut (11), one side that fixed block (9) were kept away from in protecting sheathing (6) is fixed mounting respectively has dead lever (7) and joint board (13), the one end that joint board (13) are close to dead lever (7) is provided with draw-in groove (8).

2. The residual current transformer according to claim 1, characterized in that the fixing rod (7) and the snap plate (13) are both L-shaped, the snap plate (13) extends through the snap slot (8), and the snap plate (13) is matched with both the snap slot (8) and the fixing rod (7).

3. The residual current transformer according to claim 1, wherein the insulating sponge sheets (3) and the insulating cover (4) are symmetrically distributed by taking the central axis of the magnetic iron core (1) as a symmetry axis, the sections of the insulating sponge sheets (3) and the insulating cover (4) are in a smooth U shape, and the insulating sponge sheets (3) and the insulating cover (4) are matched with the magnetic iron core (1).

4. The residual current transformer according to claim 3, characterized in that the insulating sponge sheet (3), the insulating cover (4) and the protective shell (6) are all consistent with the central axis of the magnetic core (1), and the insulating sponge sheet (3), the insulating cover (4) and the protective shell (6) are all annular.

5. The residual current transformer according to claim 1, characterized in that the side walls of the insulating sponge sheet (3), the insulating cover (4) and the protective shell (6) are provided with wire slots (12), the wire slots (12) are fixedly matched, the coil (2) penetrates through the wire slots (12), and the wire slots (12) are matched with the coil (2).

6. The residual current transformer according to claim 1, characterized in that the limiting fixture block (5) penetrates through the insulating sponge sheet (3), and the limiting fixture block (5) is matched with the coil (2) and the magnetic iron core (1).