CN216288278U

CN216288278U - Backup protection structure for circuit breaker

Info

Publication number: CN216288278U
Application number: CN202122457842.8U
Authority: CN
Inventors: 薛建虎; 蔡元钦; 陈佳超
Original assignee: Wuxi Sahat Electrical Co Ltd
Current assignee: Wuxi Sahat Electrical Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-04-12
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a backup protection structure for a circuit breaker, which is arranged on a circuit breaker base and positioned at one side of a circuit breaker draw bar, and comprises a support, a magnetic yoke and an armature, wherein the support is fixed on the circuit breaker base, a current-carrying guide piece is arranged in the support, the magnetic yoke is fixed on the outer side surface of the lower half part of the support, the armature is rotatably arranged on the outer side surface of the upper half part of the support through a pin shaft, a push rod is arranged on the armature, when short-circuit current occurs, the armature is attracted with the magnetic yoke, the push rod pushes the circuit breaker draw bar to act, and a tension spring for driving the armature and the magnetic yoke to separate and reset is arranged between the armature and the support. The backup protection structure for the circuit breaker can realize quick tripping of the circuit breaker after the electronic controller fails, reduces the space occupied by the backup protection device, accelerates the action time of the circuit breaker, increases the driving force for the traction rod, and improves the performance of the circuit breaker, thereby enhancing the protection function of the circuit breaker.

Description

Backup protection structure for circuit breaker

Technical Field

The utility model relates to the technical field of low-voltage electrical appliances, in particular to a backup protection structure for a circuit breaker.

Background

The circuit breaker is a low-voltage electrical appliance component, is mainly used for an industrial power distribution system, and plays a role in connecting and disconnecting a circuit. The electronic circuit breaker can well protect overload and short circuit, is high in precision, multifunctional, communicable and intelligent, and is more and more widely applied.

The conventional electronic circuit breaker uses an electronic release to drive a mechanism of the circuit breaker to act, the electronic release triggers magnetic flux action through a circuit board, the action time is about thirty milliseconds, and when short-circuit fault occurs, the longer action time of the electronic release can lead the breaking time of the circuit breaker to be longer than that of the common thermomagnetic circuit breaker, and breaking failure can be caused.

Therefore, when the intelligent controller fails, the breaker operating mechanism needs to be quickly braked by the backup protection device, so that the breaking circuit plays a role in protection. However, for some small-shell intelligent circuit breakers, the internal space is limited, and the installation of backup protection is very difficult, so that either a backup electromagnet cannot be placed, or a placed backup electromagnet cannot be quickly driven by a mechanism to open and cut off a fault circuit when a fault is caused by intermediate conversion, and therefore the structure of backup protection needs to be simplified as much as possible.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a backup protection structure for a circuit breaker, which simplifies the installation structure, is integrated in the existing circuit breaker, provides backup protection for an electronic circuit breaker and promotes the tripping protection of the circuit breaker.

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

the utility model provides a backup protection structure for circuit breaker, install on the circuit breaker base and lie in one side of circuit breaker traction lever, it includes the support, yoke and armature, the support is fixed in on the circuit breaker base, be provided with the current-carrying guide piece in the support, the yoke is fixed in the lower half lateral surface of support, armature sets up in the first half lateral surface of support through the round pin axle rotation, and set up the push rod on the armature, when short-circuit current appears, armature and yoke actuation, make the push rod promote the action of circuit breaker traction lever, be provided with the extension spring that is used for ordering about armature and yoke separation and resets between armature and the support.

In particular, the upper end surface of the magnetic yoke and the lower end surface of the armature correspondingly form a magnetic attraction inclined surface.

Particularly, a fixing part extends out of the side edge of the support, a flanging part is arranged on the armature, and two ends of the tension spring are respectively buckled on the fixing part and the flanging part.

Particularly, the armature comprises two half parts arranged on two sides of the support, the two half parts are linked through a connecting part, and the push rod extends out of the connecting part.

Compared with the prior art, the backup protection structure for the circuit breaker has the advantages that the backup protection structure for the circuit breaker can realize quick tripping of the circuit breaker after the electronic controller fails, the space occupied by the backup protection device is reduced, the action time of the circuit breaker is shortened, the driving force to the traction rod is increased, the performance of the circuit breaker is improved, and the protection function of the circuit breaker is enhanced.

Drawings

Fig. 1 is a schematic diagram of a backup protection structure for a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an armature in a backup protection structure for a circuit breaker according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, an indirect connection via an intermediary, a communication between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1 and 2, the preferred embodiment provides a backup protection structure for a circuit breaker, which is mounted on a circuit breaker base and located on one side of a circuit breaker drawbar, and includes a bracket 1, a yoke 2, and an armature 3.

The circuit breaker comprises a support 1, a current-carrying guide piece 4, a magnetic yoke 2, a pin shaft 5, a push rod 6 and a tension spring 7, wherein the support 1 is fixed on a circuit breaker base, the current-carrying guide piece 4 is arranged in the support 1, the magnetic yoke 2 is fixed on the outer side surface of the lower half portion of the support 1, the armature 3 is rotatably arranged on the outer side surface of the upper half portion of the support 1 through the pin shaft 5, the push rod 6 is arranged on the armature 3, and the tension spring 7 used for driving the armature 3 to be separated from the magnetic yoke 2 to reset is arranged between the armature 3 and the support 1.

Here, the upper end surface of the magnetic yoke 2 and the lower end surface of the armature 3 form a magnetic attraction inclined surface 8, which facilitates better attraction with the armature 3 according to the rotation angle of the armature 3. The specific structure is that a fixing part 9 extends out of the side edge of the bracket 1, a flanging part 10 is arranged on the armature 3, and two ends of the tension spring 7 are respectively buckled on the fixing part 9 and the flanging part 10.

The armature 3 comprises two half parts arranged on two sides of the bracket 1, the two half parts are linked through a connecting part 11, and the push rod 6 extends out of the connecting part 11.

When the magnetic iron works normally, the magnetic yoke 2 and the armature 3 are separated by the acting force of the tension spring 7; when extra-large short-circuit current occurs, an electromagnetic field can be generated, so that the magnet yoke 2 and the armature 3 are attracted, the armature 3 rotates, the push rod 6 pushes the draw bar of the circuit breaker to act, the circuit breaker is tripped, and quick breaking is realized.

In conclusion, the backup protection structure for the circuit breaker can realize quick tripping of the circuit breaker after the electronic controller fails, reduces the space occupied by the backup protection device, accelerates the action time of the circuit breaker, increases the driving force for the traction rod, improves the performance of the circuit breaker, and enhances the protection function of the circuit breaker.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the utility model, which are intended to be within the scope of the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a backup protection structure for circuit breaker, installs on the circuit breaker base and is located one side of circuit breaker traction lever, a serial communication port, including support, yoke and armature, the support is fixed in on the circuit breaker base, be provided with the current-carrying conducting piece in the support, the yoke is fixed in the lower half lateral surface of support, armature through the round pin axle rotate set up in the first half lateral surface of support, and set up the push rod on the armature, when short-circuit current appears, armature and yoke actuation make the push rod promote the action of circuit breaker traction lever, armature with be provided with the extension spring that is used for ordering about armature and yoke separation and resets between the support.

2. A backup protection structure for a circuit breaker according to claim 1, characterized in that: the upper end surface of the magnetic yoke and the lower end surface of the armature iron correspond to form a magnetic attraction inclined surface.

3. A backup protection structure for a circuit breaker according to claim 1, characterized in that: the side of support extends fixed part, be provided with turn-ups portion on the armature, the both ends of extension spring buckle respectively in fixed part with on the turn-ups portion.

4. A backup protection structure for a circuit breaker according to claim 1, characterized in that: the armature iron comprises two half parts arranged on two sides of the support, the two half parts are linked through a connecting part, and the push rod extends out of the connecting part.