Magnetic-increasing tripping structure for circuit breaker and circuit breaker

Abstract

The magnetism-increasing tripping structure comprises a static iron core, a conductor and an armature, the static iron core is provided with a bottom surface and two wing parts which are bent in the same direction, the conductor comprises a magnetic force acting part, the magnetic force acting part is located between the wing parts of the static iron core, and under the action of magnetic force, the magnetic force acting part acts on the armature. The armature rotates around the rotating shaft and is closed with the end faces of the wing parts of the static iron core, the magnetic force acting part of the conductor is provided with a snakelike turning part which is turned more than or equal to one time, and more than or equal to one interval part is arranged between the two wing parts of the static iron core. The spacing part passes through the gap between the snakelike turning parts of the conductor, so that the end face position of the spacing part corresponds to the end face position of the wing part, and the circuit breaker comprises the structure, so that the problem of weak tripping magnetic force of the circuit breaker aiming at the low-current quick breaking requirement in the prior art is solved; the beneficial effects of effectively enhancing the magnetic field of the tripping structure and enabling the circuit breaker to break the small current more quickly and effectively are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a magnetizing tripping structure for a circuit breaker and a circuit breaker. Background Art

[0002] As an important component of low-voltage electrical appliances, the performance indicators of molded case circuit breakers can constrain the development of an industry. As the application of molded case circuit breakers continues to expand, new requirements have been put forward for their design. For example, the requirements for fast disconnection of small currents are widely used in the fields of petrochemicals and new energy. In the traditional layout of the release, the U-shaped design of the static iron core has only one magnetic circuit, and the magnetic force acting part between the inlet and outlet ends is in a straight row. When the current passing through the conductor is small, the magnetic field is weak and the magnetic lines of force are sparsely distributed, which makes it impossible to generate enough suction to drive the armature and the iron core to close. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present application provides a magnetization tripping structure for a circuit breaker and a circuit breaker to solve the problem of weak tripping magnetic force of the circuit breaker for the requirement of fast breaking of small current in the prior art.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A magnetizing tripping structure for a molded case circuit breaker comprises a static iron core, a conductor and an armature, wherein the static iron core is provided with a bottom surface and two wings bent in the same direction, the conductor comprises a magnetic force action portion, the magnetic force action portion is located between the wings of the static iron core, under the action of the magnetic force, the armature rotates around the rotation axis and closes with the end surface of the wing of the static iron core, the magnetic force action portion of the conductor is provided with a serpentine turning portion that turns more than or equal to once, and more than or equal to one spacing portion is provided between the two wings of the static iron core, the spacing portion passes through the gap between the serpentine turning portions of the conductor so that its end surface position corresponds to the end surface position of the wing.

[0006] Preferably, the serpentine turning portion turns once, the serpentine moving direction is parallel to the main current direction of the tripping structure, the static iron core has one spacer, and the cross-section of the static iron core is E-shaped.

[0007] Preferably, a screw fixing hole is provided on the conductor serpentine turning portion, and a screw fixing hole is also provided at a corresponding position on the bottom surface of the static iron core, and the static iron core is fixedly connected to the conductor using fasteners through the corresponding screw fixing holes.

[0008] Preferably, the static iron core may be a split structure, the wings of the split static iron cores are closely attached to each other to form a spacing portion, and the split structure cross-section of each static iron core is U-shaped.

[0009] Preferably, the serpentine turning portion of the conductor is stacked in multiple layers.

[0010] Preferably, the connection portion between the serpentine turning portion of the conductor and the conductor mounting portion is located on the side of the armature.

[0011] Preferably, the end surfaces of the wing portion and the spacer portion of the static iron core are on the same horizontal plane.

[0012] Preferably, the number of the split structures of the static iron core is two, and the serpentine turning part turns once.

[0013] Preferably, the screw fixing hole provided on the conductor serpentine turning portion is configured with one for each serpentine side.

[0014] Based on the same inventive concept, the present application also discloses a circuit breaker, including a release assembly, wherein the release assembly includes the above-mentioned magnetizing release structure for the circuit breaker.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention aims at the traditional layout of the tripping structure in the tripper, and by setting a serpentine turning portion, the conductive circuit is lengthened and the area through which the conductor flows is increased. Since the current undergoes a turn in the area through which it flows, the strength of the magnetic flux lines in the area is increased. By adding a spacing portion in the static iron core, there is more than one magnetic circuit with the same direction, which effectively enhances the magnetic field in the area. The static iron core is set as a split structure, which effectively reduces the difficulty of processing special-shaped static iron cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a magnetization tripping structure for a circuit breaker of the present application;

[0017] Figure 2 A side view schematic diagram of an embodiment of a magnetization tripping structure for a circuit breaker of the present application;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of a serpentine turning portion of a conductor according to an embodiment of the present application after one turning;

[0019] Figure 4 This is a front view schematic diagram of an embodiment of a split structure static iron core of the present application;

[0020] Figure 5 This is a front view schematic diagram of an embodiment of an integrated structure static iron core of the present application;

[0021] Figure 6 A schematic diagram of the three-dimensional structure of a release assembly of an embodiment of a circuit breaker of the present application, comprising two layers of conductors stacked three times with a serpentine turning portion;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the prior art release;

[0023] Among them, 1-static iron core, 11-wing part, 12-spacer part, 13-bottom surface, 14-end surface, 2-conductor, 21-inlet end, 22-outlet end, 23-snake-shaped turning part, 24-installation part, 25-connecting part, 3-armature, 31-rotating axis. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0025] The present embodiment provides a technical solution: the present solution discloses a magnetizing tripping structure for a circuit breaker, comprising a static iron core 1, a conductor 2 and an armature 3, wherein the static iron core 1 is provided with a bottom surface 13 and two wings 11 bent in the same direction, wherein the conductor 2 comprises an inlet terminal 21, a magnetic force action portion, a connecting portion 25, a mounting portion 24 and an outlet terminal 22 according to the direction of current flow, wherein the current enters from the inlet terminal 21 and exits from the outlet terminal 22, wherein the magnetic force action portion of the conductor 2 is located between the wings of the static iron core 1, and when the conductor 2 passes current, the armature 3 is subjected to the action of electromagnetic attraction and rotates counterclockwise around the rotating shaft 31, thereby causing the armature 3 and the static iron core 1 to be in contact with each other. The end face 14 of the wing 11 is closed to achieve the purpose of line disconnection. In one embodiment, the magnetic force acting part of the conductor 2 is provided with a serpentine turning part 23 that turns once. The serpentine travel direction is parallel to the mainstream direction of the current, that is, the line from the upper left outlet terminal 21 to the mounting part 24. A spacer 12 is provided between the two wings 11 of the static iron core 1. At this time, the cross section of the static iron core 1 forms an E shape. The spacer 12 passes through the gap between the serpentine turning parts 23 of the conductor 2 so that the position of its end face 14 corresponds to the position of the end face 14 of the wing 11. In this embodiment, the end faces 14 of the wing 11 and the spacer 12 are on the same horizontal plane. Of course, the serpentine travel direction can also be perpendicular to the mainstream direction of the tripping structure current or other equivalent directions.

[0026] Since a spacer 12 is added between the wings 11 of the static iron core 1 in this example, the cross-section of the static iron core 1 is irregular. Although it can be made by other processes such as powder metallurgy, in order to reduce the difficulty of processing, the static iron core 1 can be a split structure. The wings of the split static iron core 1 are close to each other to form the spacer 12. The cross-section of the split structure of each static iron core 1 is U-shaped, and the difficulty of processing is greatly reduced. In the embodiment of the present application where the serpentine turning part 23 is a one-time turning, the number of the split structures of the static iron core 1 is two.

[0027] When the serpentine turning portion 23 turns more than once, in order to control the lateral space, the serpentine turning portion 23 of the conductor 2 can also be stacked in multiple layers. For example, in the embodiment shown in the drawings, the serpentine turning portion 23 that turns three times is stacked in two layers.

[0028] When the serpentine turning part 23 turns an odd number of times, for example, the connection part 25 between the serpentine turning part 23 of the conductor 2 and the conductor 2 mounting part 24 is located on the side of the armature 3. When it turns an even number of times, it can be directly connected through the bottom.

[0029] A screw fixing hole is provided on the serpentine turning portion 23 of the conductor 2, and a screw fixing hole is also provided on the corresponding position of the bottom surface 13 of the static iron core 1. The static iron core 1 is fixedly connected to the conductor 2 using fasteners through the corresponding screw fixing holes. In one embodiment, the screw fixing hole provided on the serpentine turning portion 23 of the conductor 2 is configured for each serpentine edge, and a screw fixing hole is also provided on the split structure of each static iron core 1.

[0030] Based on the same inventive concept, the present application also discloses a circuit breaker, which may be a molded case circuit breaker. The circuit breaker includes a release assembly, and the release assembly includes the above-mentioned magnetizing release structure for the circuit breaker.

[0031] In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second", etc. appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] The above is only a preferred specific implementation method of the present scheme, but the protection scope required by the present scheme is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and inventive concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A magnetizing tripping structure for a circuit breaker, comprising a static iron core (1), a conductor (2) and an armature (3), wherein the static iron core (1) is provided with a bottom surface (13) and two wing portions (11) bent in the same direction, the conductor (2) comprises a magnetic force acting portion, the magnetic force acting portion is located between the wing portions (11) of the static iron core (1), and under the action of the magnetic force, the armature (3) rotates around a rotation axis to close with the end surface (14) of the wing portion (11) of the static iron core (1), characterized in that: The magnetic force acting part of the conductor (2) is provided with a serpentine turning part (23) that turns more than once, and between the two wing parts (11) of the static iron core (1) there is provided more than one spacer part (12), and the spacer part (12) passes through the gap between the serpentine turning parts (23) of the conductor (2) so that the position of its end face (14) corresponds to the position of the wing end face (14).

2. The magnetizing tripping structure for circuit breaker according to claim 1, characterized in that: The serpentine turning portion (23) turns once, the serpentine moving direction is parallel to the main current direction of the tripping structure, the static iron core (1) has one spacing portion (12), and the cross section of the static iron core (1) is E-shaped.

3. The magnetizing tripping structure for circuit breaker according to claim 1, characterized in that: The conductor (2) serpentine turning portion (23) is provided with a screw fixing hole, and a corresponding position of the bottom surface (13) of the static iron core (1) is also provided with a screw fixing hole, and the static iron core (1) is fixedly connected to the conductor (2) through the corresponding screw fixing hole using fasteners.

4. The magnetizing tripping structure for circuit breaker according to claim 1, characterized in that: The static iron core (1) may be a split structure, wherein the wings of the split static iron core (1) are closely attached to each other to form a spacing portion (12), and the split structure cross section of each static iron core (1) is U-shaped.

5. The magnetizing tripping structure for circuit breaker according to claim 4, characterized in that: The serpentine turning portion (23) of the conductor (2) is composed of multiple layers.

6. The magnetizing tripping structure for circuit breaker according to claim 1, characterized in that: The connection portion (25) between the serpentine turning portion (23) of the conductor (2) and the conductor (2) mounting portion (24) is located on the side of the armature (3).

7. The magnetizing tripping structure for circuit breaker according to claim 1, characterized in that: The wing portion (11) and the end surface (14) of the spacer portion (12) of the static iron core (1) are on the same horizontal plane.

8. The magnetizing tripping structure for circuit breaker according to claim 4, characterized in that: The number of split structures of the static iron core (1) is two, and the serpentine turning portion (23) turns once.

9. The magnetizing tripping structure for circuit breaker according to claim 3, characterized in that: The screw fixing hole provided on the serpentine turning portion (23) of the conductor (2) is configured with one for each serpentine side.

10. A circuit breaker, comprising a trip assembly, characterized in that: The release assembly includes the magnetization tripping structure for a circuit breaker according to any one of claims 1 to 9.

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