A magnetic control circuit breaker operating mechanism

Abstract

The utility model discloses a kind of magnetic control circuit breaker operating mechanisms, including aluminum shell, the top of the aluminum shell is detachably provided with mechanism upper cover, the bottom of the aluminum shell is detachably provided with mechanism lower cover, the upper surface of the mechanism lower cover is fixedly connected with semi-hard magnetic static core, the upper portion of the aluminum shell inner chamber is provided with semi-hard magnetic moving iron core moving in vertical direction, semi-hard magnetic moving iron core with between the semi-hard magnetic static core vertically is provided with opening spring, the utility model relates to magnetic control circuit breaker technical field.The magnetic control circuit breaker operating mechanism, by semi-hard magnetic moving iron core and semi-hard magnetic static core using semi-hard magnetic material, realize the low-power consumption bistable state maintenance, strong anti-interference ability, high reliability, magnetic control mechanism uses electromagnetic force direct drive, mechanical component greatly reduces, structure is more compact, simple, magnetic control mechanism increases aluminum shell and plays shielding effect, external power supply and electromagnetic field will not produce interference to mechanism inside, while also improve the overall strength of magnetic control mechanism.

Description

Technical Field

[0001] This utility model relates to the field of magnetically controlled circuit breaker technology, specifically to a magnetically controlled circuit breaker operating mechanism. Background Technology

[0002] The core of a magnetically controlled circuit breaker's operating mechanism is to use electromagnetic force to directly or indirectly drive the contacts, thereby closing and opening the circuit. A typical magnetically controlled operating mechanism (taking a permanent magnet mechanism as an example) mainly consists of the following core components: Permanent magnet: Usually high-performance neodymium iron boron (NdFeB) or samarium cobalt (SmCo) permanent magnet materials are used to provide holding force; its function is to use the attraction of the magnetic field to firmly hold the moving iron core in the corresponding position when the circuit breaker is in the open or closed end position, thereby eliminating the mechanical locking device of the traditional spring mechanism. Opening coil & closing coil: two independent excitation coils; when energized, they generate electromagnetic force to drive the moving iron core to move; Moving iron core: It is rigidly connected to the moving contact rod of the circuit breaker. The electromagnetic force generated by the coil and the holding force of the permanent magnet both act on it. Its linear motion is directly converted into the opening and closing action of the contacts. Static iron core: It forms part of the magnetic circuit and provides a low magnetic resistance path for the magnetic field; Drive rod: Connects the moving iron core and the moving contact inside the vacuum interrupter; Capacitor energy storage system: This is a critical peripheral system; since the opening / closing operation requires a large instantaneous current, a large-capacity capacitor bank is usually used as the energy storage element, which discharges instantaneously to the coil during operation.

[0003] However, existing magnetically controlled circuit breaker operating mechanisms may experience performance degradation or irreversible demagnetization of the permanent magnets after strong vibration, high temperature (especially neodymium iron boron permanent magnets), strong reverse magnetic field, or long-term use. Once the magnetic force weakens to the point of being insufficient to maintain the position, the circuit breaker may open or close during normal operation, causing dangerous accidents. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a magnetically controlled circuit breaker operating mechanism, which solves the problem that existing magnetically controlled circuit breaker operating mechanisms may experience performance degradation or irreversible demagnetization of the permanent magnet after strong vibration, high temperature, strong reverse magnetic field, or long-term use.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a magnetically controlled circuit breaker operating mechanism, including an aluminum housing, a mechanism upper cover detachably disposed on the top of the aluminum housing, a mechanism lower cover detachably disposed on the bottom of the aluminum housing, a semi-hard magnetic stationary iron core fixedly connected to the upper surface of the mechanism lower cover, a semi-hard magnetic moving iron core that moves vertically disposed in the upper part of the inner cavity of the aluminum housing, a tripping spring vertically disposed between the semi-hard magnetic moving iron core and the semi-hard magnetic stationary iron core, and a closing / opening coil disposed in the inner cavity of the semi-hard magnetic moving iron core; The top of the semi-hard magnetic core extends movably to the top of the mechanism cover, and a pressure plate that can be adjusted in height is detachably installed through the support plate structure. A trigger screw is fixedly connected to the other end of the pressure plate, and a position switch located below the trigger screw is detachably installed on the side wall of the semi-hard magnetic core.

[0006] Furthermore, the support plate structure includes an adjusting nut and several locking screws. The adjusting nut is threadedly connected to the top of the semi-hard magnetic core through the multiple locking screws, and the pressure plate is detachably disposed on the top of the adjusting nut.

[0007] Furthermore, a switch bracket is detachably provided on the side wall of the trigger screw, and the position switch is detachably provided on the surface of the switch bracket.

[0008] Furthermore, a copper guide sleeve is provided on the lower cover of the mechanism.

[0009] Furthermore, a limiting groove is formed between the semi-hard magnetic stationary iron core and the semi-hard magnetic moving iron core, and the opening spring is vertically arranged between the two limiting grooves.

[0010] Furthermore, the lower cover and the upper cover of the mechanism are both detachably connected to the aluminum housing by screws, and the outer surfaces of the upper cover and the lower cover of the mechanism are provided with countersunk holes that are compatible with the screws.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by using semi-hard magnetic materials for both the semi-hard magnetic moving iron core and the semi-hard magnetic stationary iron core, it achieves low-power bistable operation, strong anti-interference ability, and high reliability. The magnetic control mechanism is directly driven by electromagnetic force, which greatly reduces the number of mechanical parts and makes the structure more compact and simple. The addition of an aluminum shell to the magnetic control mechanism provides shielding, preventing external power supply and electromagnetic fields from interfering with the internal structure. It also improves the overall strength of the magnetic control mechanism. In addition, the copper guide sleeve ensures effective closing and opening without jamming. An adjusting nut is added to the magnetic control mechanism to adjust the opening distance and facilitate testing and debugging. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front sectional view of the present invention. Figure 3 This is a front structural diagram of the present invention.

[0013] In the diagram: 1. Trigger screw; 2. Position switch; 3. Switch bracket; 4. Pressure plate; 5. Adjusting nut; 6. Locking screw; 7. Upper cover of mechanism; 8. Semi-hard magnetic core; 9. Opening spring; 10. Opening / closing coil; 11. Copper guide sleeve; 12. Aluminum shell; 13. Semi-hard magnetic core; 14. Lower cover of mechanism. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 This utility model provides a technical solution: a magnetically controlled circuit breaker operating mechanism, including an aluminum housing 12, a mechanism upper cover 7 detachably disposed on the top of the aluminum housing 12, a mechanism lower cover 14 detachably disposed on the bottom of the aluminum housing 12, and a semi-hard magnetic static iron core 13 fixedly connected to the upper surface of the mechanism lower cover 14.

[0016] A semi-hard magnetic core 8 that moves vertically is provided in the upper part of the inner cavity of the aluminum shell 12. A tripping spring 9 is vertically arranged between the semi-hard magnetic core 8 and the semi-hard magnetic stationary core 13. A closing and tripping coil 10 is provided in the inner cavity of the semi-hard magnetic core 8.

[0017] The top of the semi-hard magnetic core 8 extends to the top of the mechanism cover 7, and a pressure plate 4 with adjustable support height is installed by means of a support plate structure.

[0018] The other end of the pressure plate 4 is fixedly connected to a trigger screw 1, and the side wall of the semi-hard magnetic core 8 is detachably equipped with a position switch 2 located below the trigger screw 1.

[0019] In this embodiment, the semi-hard magnetic moving iron core 8 and the semi-hard magnetic stationary iron core 13 are made of semi-hard magnetic materials, which achieves low power consumption bistable maintenance, strong anti-interference ability and high reliability. The magnetic control mechanism is directly driven by electromagnetic force, which greatly reduces the number of mechanical parts and makes the structure more compact and simple.

[0020] The addition of an aluminum outer shell 12 to the magnetic control mechanism serves as a shield, preventing external power sources and electromagnetic fields from interfering with the internal structure and also improving the overall strength of the magnetic control mechanism.

[0021] When the closing and opening coil 10 is energized, it generates a magnetic field. This magnetic field interacts with the magnetic circuit formed by the semi-hard magnetic stationary iron core 13, generating a strong electromagnetic attraction. Driven by the electromagnetic force, the semi-hard magnetic moving iron core 8 begins to move towards the closing position, compressing the opening spring 9 to contract and deform, generating elastic force.

[0022] When the semi-hard magnetic moving iron core 8 moves to the closing end position, the pressure plate 4 drives the trigger screw 1 to move. When the trigger screw 1 contacts the position switch 2, it triggers the closing. After closing, the power is cut off, and the closing state is maintained by the magnetic force of the semi-hard magnet.

[0023] When it is necessary to open the circuit breaker, the magnetic field generated by the reverse energization of the opening and closing coil 10 releases the energy stored in the opening spring 9, which quickly pushes the semi-hard magnetic core 8 to the opening position.

[0024] After the semi-hard magnetic core 8 reaches the end of the tripping process, it triggers the position switch 2 by moving the trigger screw 1 away from the position switch 2, thus confirming that the tripping is in place.

[0025] The support plate structure includes an adjusting nut 5 and several locking screws 6. The adjusting nut 5 is threadedly connected to the top of the semi-hard magnetic core 8 by the multiple locking screws 6. The pressure plate 4 is detachably set on the top of the adjusting nut 5. By adding the adjusting nut 5 to the magnetic control mechanism and turning the locking screws 6, the height of the adjusting nut 5 can be adjusted. In turn, the position of the trigger screw 1 can be adjusted by the pressure plate 4 to adjust the opening distance and facilitate testing and debugging.

[0026] The side wall of the trigger screw 1 is detachably equipped with a switch bracket 3, and the position switch 2 is detachably installed on the surface of the switch bracket 3. The position switch 2 is installed on the switch bracket 3 to confirm that the circuit is closed.

[0027] A copper guide sleeve 11 is provided on the lower cover 14 of the mechanism. The copper guide sleeve 11 can ensure effective closing and opening of the circuit breaker without the mechanism getting stuck.

[0028] A limiting groove is provided between the semi-hard magnetic stationary iron core 13 and the semi-hard magnetic moving iron core 8. The opening spring 9 is vertically arranged between the two limiting grooves. The limiting groove can guide and limit the deformation of the opening spring 9, and prevent the opening spring 9 from bending during the deformation process.

[0029] The lower cover 14 and the upper cover 7 of the mechanism are both connected by screws and aluminum housing 12. The outer surfaces of the upper cover 7 and the lower cover 14 of the mechanism are provided with countersunk holes that are compatible with the screws.

[0030] During operation, the closing / opening coil 10 generates a magnetic field after being energized. This magnetic field interacts with the magnetic circuit formed by the semi-hard magnetic stationary iron core 13, generating a strong electromagnetic attraction. Driven by this electromagnetic force, the semi-hard magnetic moving iron core 8 begins to move towards the closing position, compressing the opening spring 9 and generating elastic force. When the semi-hard magnetic moving iron core 8 reaches the closing end position, the pressure plate 4 drives the trigger screw 1 to move. When the trigger screw 1 contacts the position switch 2, it triggers the closing. After closing, the power is de-energized, and the closing state is maintained by the magnetic force of the semi-hard magnet. When opening is required, the magnetic field generated by the reverse energization of the closing / opening coil 10 activates the energy stored in the opening spring 9. The quantity is released, quickly pushing the semi-hard magnetic core 8 to the open position. After the semi-hard magnetic core 8 reaches the open end point, it triggers the position switch 2 by moving the trigger screw 1 away from the position switch 2, confirming that the open position is in place. The semi-hard magnetic core 8 and the semi-hard magnetic core 13 are made of semi-hard magnetic material, achieving low power consumption bistable state maintenance, strong anti-interference ability, and high reliability. The magnetic control mechanism is directly driven by electromagnetic force, greatly reducing mechanical parts and making the structure more compact and simple. The addition of an aluminum shell 12 to the magnetic control mechanism plays a shielding role, so that external power supply and electromagnetic field will not interfere with the internal mechanism, and at the same time improve the overall strength of the magnetic control mechanism.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetically controlled circuit breaker operating mechanism, comprising an aluminum housing (12), characterized in that: The top of the aluminum shell (12) is provided with a mechanism upper cover (7), and the bottom of the aluminum shell (12) is provided with a mechanism lower cover (14). A semi-hard magnetic stationary iron core (13) is fixedly connected to the upper surface of the mechanism lower cover (14). A semi-hard magnetic moving iron core (8) that moves vertically is provided in the upper part of the inner cavity of the aluminum shell (12). A tripping spring (9) is vertically provided between the semi-hard magnetic moving iron core (8) and the semi-hard magnetic stationary iron core (13). A closing and opening coil (10) is provided in the inner cavity of the semi-hard magnetic moving iron core (8). The top of the semi-hard magnetic core (8) extends movably to the top of the mechanism cover (7), and a pressure plate (4) that can adjust the support height is detachably installed through the support plate structure. The other end of the pressure plate (4) is fixedly connected to a trigger screw (1), and a position switch (2) located below the trigger screw (1) is detachably installed on the side wall of the semi-hard magnetic core (8).

2. The magnetically controlled circuit breaker operating mechanism according to claim 1, characterized in that: The support plate structure includes an adjusting nut (5) and several locking screws (6). The adjusting nut (5) is threadedly connected to the top of the semi-hard magnetic core (8) by the multiple locking screws (6). The pressure plate (4) is detachably disposed on the top of the adjusting nut (5).

3. The magnetically controlled circuit breaker operating mechanism according to claim 1, characterized in that: The trigger screw (1) is detachably provided with a switch bracket (3), and the position switch (2) is detachably provided on the surface of the switch bracket (3).

4. The magnetically controlled circuit breaker operating mechanism according to claim 1, characterized in that: A copper guide sleeve (11) is provided on the lower cover (14) of the mechanism.

5. The magnetically controlled circuit breaker operating mechanism according to claim 1, characterized in that: A limiting groove is provided between the semi-hard magnetic static iron core (13) and the semi-hard magnetic moving iron core (8), and the opening spring (9) is vertically arranged between the two limiting grooves.

6. The magnetically controlled circuit breaker operating mechanism according to claim 1, characterized in that: The lower cover (14) and the upper cover (7) of the mechanism are both connected by screws and the aluminum shell (12). The outer surfaces of the upper cover (7) and the lower cover (14) of the mechanism are provided with countersunk holes that are compatible with the screws.

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