CN210039904U

CN210039904U - Residual current transformer

Info

Publication number: CN210039904U
Application number: CN201920884226.0U
Authority: CN
Inventors: 蒋大维; 朱慧; 吴垚; 顾伟; 杨有振; 袁芬; 蒋萍; 李果
Original assignee: Jiangyin Spark Electronic Technology Co Ltd
Current assignee: Jiangyin Spark Electronic Technology Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-02-07
Anticipated expiration: 2029-06-12

Abstract

The utility model relates to a residual current transformer, the residual current transformer includes upper semi-ring (1) and lower semi-ring (2), the left end of upper semi-ring (1) is articulated with the left end of lower semi-ring (2) through round pin axle (3), the right-hand member of upper semi-ring (1) is connected with the right-hand member of lower semi-ring (2) through hasp (4); the upper winding group (105) and the lower winding group (205) are connected to each other. The utility model relates to a residual current transformer, it has installation convenient to use swift and product property can be good, the advantage that the measurement equilibrium is good.

Description

Residual current transformer

Technical Field

The utility model relates to a residual current transformer belongs to mutual-inductor technical field.

Background

At present, an intelligent opening-closing type residual current transformer in the residual current transformer is also called as a residual current sensor for fire protection and fire monitoring, and the intelligent opening-closing type residual current transformer has the main functions of monitoring, controlling and managing whether a circuit normally operates or not by sensing the residual current of an electric circuit, sending an alarm through equipment, timely notifying operation and maintenance personnel, handling abnormity or faults, eliminating electric fire hidden dangers and protecting the life safety and property safety of people.

In implementation and use, the conventional residual current transformer is found to have the following defects that the ① open-close type structure is tightened by screws, so that the installation is complicated, the ② high-low temperature characteristic of the conventional residual current transformer cannot meet the requirement, the requirement of national standards on the sensor is very strict at present, the high-low temperature requirement is-40 ℃ -75 ℃, the conventional residual current transformer adopts epoxy encapsulation, the method is that an iron core is wound on a coil and then placed into a shell for epoxy encapsulation, and under the high-low temperature environment, the iron core is subjected to large stress due to the inconsistent shrinkage rate of epoxy and the iron core, so that the performance of the iron core is reduced, and the performance of the transformer is reduced finally, the ③ conventional open-close type residual current transformer adopts screw connection, so that the coil cannot be wound between two half bodies at the same time, only one side winding is adopted, and the balance characteristic of the iron core is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the aforesaid not enough, provide a residual current transformer, it has installation convenient to use swift and product property can be good, the advantage that the measurement equilibrium is good.

The purpose of the utility model is realized like this:

a residual current transformer comprises an upper half ring and a lower half ring, wherein the left end of the upper half ring is hinged with the left end of the lower half ring through a pin shaft, and the right end of the upper half ring is connected with the right end of the lower half ring through a hasp;

the upper half ring comprises an upper iron core assembly arranged in an upper shell, the upper iron core assembly comprises an upper half iron core arranged in an upper framework, and an upper winding group is wound on the upper framework;

the lower half ring comprises a lower iron core assembly arranged in the lower shell, the lower iron core assembly comprises a lower half iron core arranged in a lower framework, and a lower winding group is wound on the lower framework; and the upper winding group and the lower winding group are connected with each other.

The utility model relates to a residual current transformer, the left end of going up casing and lower casing all protrudes and is provided with the engaging lug, and two engaging lugs about the laminating place, all seted up the round pin shaft hole on two engaging lugs, the vertical cross-under of above-mentioned round pin axle is in the round pin shaft hole.

The utility model relates to a residual current transformer is provided with the trough on the engaging lug, goes up the wire winding group and is located the trough with the line between the lower wire winding group.

The utility model relates to a residual current transformer, the hasp includes the opening hooked member up and protrusion connecting block on the casing down of installing on last casing, and the top of returning face plate articulates on the connecting block, and square circle one end activity is passed returning face plate, the other end articulates on the hooked member.

The utility model relates to a residual current transformer's processing step does:

step one, preparing an iron core component: and respectively placing the iron cores of the two semi-ring structures in the frameworks of the two semi-ring structures, and sequentially winding an upper coil winding on the two frameworks by using an induction line.

Preferably, the two prepared iron core components are respectively placed in two annular shells, one ends of the two shells are hinged, the other ends of the two shells are connected through a hasp, and a connecting line between windings of the two iron core components is embedded in a wiring groove of the hinged part of the shells.

Preferably, the framework comprises two framework rings with left and right semi-annular structures, the mating surfaces of the two framework rings are respectively provided with a semi-annular iron core groove, the mating surfaces of the two framework rings are respectively provided with a positioning hole and a positioning column, when the framework is installed, the iron core is placed in the iron core groove of one framework ring, then the other framework ring is pressed, and the framework rings are connected in a matching way through the positioning hole and the positioning column.

Preferably, above-mentioned casing includes semi-annular structure's casing bottom and gland board on it, the casing bottom is provided with semi-annular structure's mounting groove, during the installation with iron core subassembly inlay in the mounting groove earlier, then the lid closes the gland board, is provided with the through-hole that the lead-out wire that supplies coil winding worn out on the gland board, the lead-out wire of iron core subassembly passes this through-hole and draws forth.

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

the utility model has the advantages that the disconnection of the primary circuit is not needed in the using process, thereby greatly facilitating the later transformation of the electrical circuit of the building; specifically, the utility model has the advantages of as follows:

① the utility model adopts the hasp to install, the installation is fast and convenient;

② the utility model adopts the framework isolation iron core and epoxy design, so that the iron core is not affected by epoxy in high and low temperature environment, thereby ensuring the performance of the product;

③ the utility model discloses the utensil improves from structural design, adopts bilateral wire winding to the iron core (with the connecting wire between two upper and lower windings embedded in the hinge portion) to guarantee its good balanced characteristic.

Drawings

Fig. 1 is the utility model relates to a residual current transformer's schematic structure diagram.

Fig. 2 is the utility model relates to a residual current transformer's lower skeleton and assembly effect schematic diagram of half iron core down.

Fig. 3 is the utility model relates to a residual current transformer's last skeleton and the assembly effect schematic diagram of skeleton down.

Fig. 4 is the utility model relates to a residual current transformer's last iron core subassembly and lower iron core subassembly's local effect schematic diagram.

Fig. 5 is the utility model relates to a residual current transformer's last iron core subassembly and lower iron core subassembly's effect schematic diagram.

Fig. 6-9 are the utility model relates to a residual current transformer's last casing and assembly effect schematic diagram of casing down.

Fig. 10 to 11 are schematic diagrams of the assembly effect of the upper shell and the upper iron core assembly of the residual current transformer.

Fig. 12-14 are the utility model relates to a residual current transformer's overall assembly effect schematic diagram.

Fig. 15-19 are the utility model relates to a residual current transformer's schematic structure.

Wherein:

the upper half ring 1, the lower half ring 2, the pin shaft 3 and the hasp 4;

an upper shell 101, an upper iron core assembly 102, an upper framework 103, an upper iron core half 104 and an upper winding set 105;

the lower iron core comprises a lower shell 201, a lower iron core assembly 202, a lower framework 203, a lower half iron core 204 and a lower winding set 205.

Detailed Description

Referring to fig. 1 to 19, the residual current transformer of the present invention comprises an upper half ring 1 and a lower half ring 2, wherein the left end of the upper half ring 1 is hinged to the left end of the lower half ring 2 through a pin shaft 3, and the right end of the upper half ring 1 is connected to the right end of the lower half ring 2 through a buckle 4;

the upper half ring 1 comprises an upper iron core assembly 102 arranged in an upper shell 101, the upper iron core assembly 102 comprises an upper half iron core 104 arranged in an upper framework 103, and an upper winding group 105 is wound on the upper framework 103;

the lower half ring 2 comprises a lower iron core assembly 202 arranged in a lower shell 201, the lower iron core assembly 202 comprises a lower half iron core 204 arranged in a lower framework 203, and a lower winding group 205 is wound on the lower framework 203; and the upper winding group 105 and the lower winding group 205 are connected to each other;

furthermore, the left ends of the upper shell 101 and the lower shell 201 are respectively provided with a convex connecting lug, the two connecting lugs are arranged in an up-and-down fit manner, the two connecting lugs are respectively provided with a pin shaft hole, and the pin shaft 3 is vertically penetrated in the pin shaft holes;

furthermore, a wiring groove is formed in the connecting lug, and a connecting line between the upper winding group 105 and the lower winding group 205 is positioned in the wiring groove;

furthermore, the hasp 4 comprises a hook member with an upward opening and arranged on the upper shell 101, and a connecting block protruding from the lower shell 201, the top of the turnover plate is hinged to the connecting block, one end of the square ring movably penetrates through the turnover plate, and the other end of the square ring is connected to the hook member in a hanging manner.

The manufacturing steps of the residual current transformer are as follows:

step one, preparing an iron core component: respectively placing the iron cores of the two semi-ring structures in the frameworks of the two semi-ring structures, and sequentially winding an upper coil winding on the two frameworks by using an induction wire;

step two, respectively placing the prepared two iron core components into two annular shells, wherein one ends of the two shells are hinged, the other ends of the two shells are connected through a hasp, and a connecting line between windings of the two iron core components is embedded into a wiring groove of the hinged part of the shells;

furthermore, the framework comprises a left framework ring and a right framework ring which are of a semi-annular structure, semi-annular iron core grooves are formed in the mating surfaces of the two framework rings, positioning holes and positioning columns are respectively formed in the mating surfaces of the two framework rings, an iron core is placed in the iron core groove of one framework ring during installation, the other framework ring is pressed, and the two framework rings are connected in a matched mode through the positioning holes and the positioning columns;

furthermore, the shell comprises a shell bottom with a semi-annular structure and a gland plate which is pressed on the shell bottom, the shell bottom is provided with an installation groove with the semi-annular structure, the iron core component is firstly embedded in the installation groove during installation, then the gland plate is covered, the gland plate is provided with a through hole for leading out of an outgoing line of the coil winding, and the outgoing line of the iron core component passes through the through hole to be led out;

in addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.

Claims

1. The utility model provides a residual current transformer, residual current transformer includes last semi-ring (1) and lower semi-ring (2), its characterized in that: the left end of the upper half ring (1) is hinged with the left end of the lower half ring (2) through a pin shaft (3), and the right end of the upper half ring (1) is connected with the right end of the lower half ring (2) through a hasp (4);

the upper half ring (1) comprises an upper iron core assembly (102) arranged in an upper shell (101), the upper iron core assembly (102) comprises an upper half iron core (104) arranged in an upper framework (103), and an upper winding group (105) is wound on the upper framework (103);

the lower half ring (2) comprises a lower iron core assembly (202) arranged in a lower shell (201), the lower iron core assembly (202) comprises a lower half iron core (204) arranged in a lower framework (203), and a lower winding set (205) is wound on the lower framework (203); and the upper winding group (105) and the lower winding group (205) are connected to each other.

2. A residual current transformer according to claim 1, characterised in that: go up the left end of casing (101) and lower casing (201) and all bulge and be provided with the engaging lug, and two engaging lugs laminate from top to bottom and place, have all seted up the round pin shaft hole on two engaging lugs, the vertical cross-under of above-mentioned round pin axle (3) is in the round pin shaft hole.

3. A residual current transformer according to claim 1, characterised in that: the connecting lug is provided with a wiring groove, and a connecting line between the upper winding group (105) and the lower winding group (205) is positioned in the wiring groove.

4. A residual current transformer according to claim 1, characterised in that: the hasp (4) comprises a hook piece with an upward opening and arranged on the upper shell (101) and a connecting block protruding out of the lower shell (201), the top of the turnover plate is hinged to the connecting block, one end of the square ring movably penetrates through the turnover plate, and the other end of the square ring is connected to the hook piece in a hanging mode.