A magnetic control energy-saving type 10KV high-voltage three-phase single-structure direct-acting vacuum alternating current contactor

Abstract

The utility model discloses a kind of magnetic control energy-saving type 10KV high voltage three-phase single mechanism direct-acting vacuum ac contactors, including fixed seat, the lower part of the fixed seat inner cavity is provided with the push plate sliding along vertical direction, the upper surface of the push plate is fixedly connected with semi-hard magnetic moving iron core, the top of the fixed seat inner cavity is fixedly connected with semi-hard magnetic static iron core, semi-hard magnetic moving iron core with the semi-hard magnetic static iron core between being provided with brake spring, the utility model relates to vacuum ac contactor technical field.The magnetic control energy-saving type 10KV high voltage three-phase single mechanism direct-acting vacuum ac contactor, by adopting unique up-down arrangement structure, efficient and reliable operating mechanism is realized, when forward power-on, contactor attraction, and rely on the remanence of semi-hard magnetic material to keep attraction state, even power-off can maintain;And when need to release, only need to reverse power-on, brake force is provided by spring elastic force, ensure quick and reliable disconnection, reduce the demand of continuous power-on.

Description

Technical Field

[0001] This utility model relates to the field of vacuum AC contactor technology, specifically a magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor. Background Technology

[0002] The technical field attribution of 10kV high-voltage three-phase vacuum AC contactors needs to be comprehensively defined by considering their voltage level, arc-extinguishing medium, drive mechanism, functional attributes, and application scenarios. The core technical field can be broken down into the following categories, and there are multiple overlapping characteristics. High-voltage electrical equipment is the core device in the power system used for "switching, controlling, and protecting high-voltage electrical energy". The core function of AC contactors in the power system control and protection technology direction is "to realize remote and frequent switching control of high-voltage circuits according to control signals", such as controlling the start-up / stopping / switching of high-voltage motors, high-voltage capacitor banks, and high-voltage distribution lines.

[0003] In the field of industrial power distribution technology, 10KV high-voltage three-phase vacuum AC contactors are widely used in the internal power distribution networks of industrial enterprises (such as steel, chemical and mining) to control high-voltage three-phase loads (such as large three-phase motors and three-phase rectifier equipment) or as control units of three-phase circuits in three-phase systems. They are key actuators for "power distribution and load control" in industrial power distribution systems and therefore belong to the category of industrial power distribution technology.

[0004] In the existing technology, traditional AC contactors are based on the working principle of "energizing, holding, and releasing". During operation, more than 90% of the energy consumption is concentrated in the hysteresis loss, eddy current loss and short-circuit ring loss of the iron core. In addition, the power factor is low, the noise is high, the coil temperature rises, and the service life of the contactor coil is reduced. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor, which solves the problem of high energy consumption during operation of traditional AC contactors based on the working principle of "energized engagement, energized holding, and de-energized release".

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor, including a fixed base, a push plate that slides vertically in the lower part of the inner cavity of the fixed base, a semi-hard magnetic moving iron core fixedly connected to the upper surface of the push plate, a semi-hard magnetic stationary iron core fixedly connected to the top of the inner cavity of the fixed base, and a tripping spring provided between the semi-hard magnetic moving iron core and the semi-hard magnetic stationary iron core; The inner cavity of the fixed base is provided with a drive coil adapted to the semi-hard magnetic moving iron core and the semi-hard magnetic stationary iron core. A transmission shaft is fixedly connected to the semi-hard magnetic moving iron core. The top end of the transmission shaft is pulled out and extended above the semi-hard magnetic stationary iron core, and a drive rod is fixedly connected to it laterally. The top of the fixed base is provided with an opening and closing mechanism for the switch driven by the drive rod. A manual opening mechanism is provided on the lower surface of the push plate.

[0007] Furthermore, the opening and closing mechanism includes three support frames, three corresponding insulators, and a moving contact. All three support frames are fixedly connected to the top of the fixed base. A vacuum interrupter is fixedly connected to the top of the inner wall of the support frame. The insulator is slidably disposed in the lower part of the inner cavity of the support frame in a vertical direction. The bottom end of the insulator is pulled out and extends into the inner cavity of the fixed base and is fixedly connected to the top of the drive rod. A fixed contact is fixedly connected to the top of the inner wall of the vacuum interrupter. The moving contact is fixedly connected to the top end of the insulator, and the top end is pulled out and extends into the upper part of the inner cavity of the vacuum interrupter.

[0008] Furthermore, the top of the support frame is fixedly connected to an incoming copper busbar that is electrically connected to the fixed contact, and the surface of the support frame is provided with a flexible copper busbar that is electrically connected to the moving contact.

[0009] Furthermore, the opposing surfaces of the semi-hard magnetic moving iron core and the semi-hard magnetic stationary iron core are both provided with grooves, and the opening spring is disposed between the two grooves and is movably covered outside the transmission shaft.

[0010] Furthermore, the manual tripping mechanism includes a manual tripping operating component, which is disposed at the bottom of the inner cavity of the fixed base. A manual tripping rotating shaft is fixedly connected to the surface of the manual tripping operating component, and a manual tripping pressure plate is fixedly connected to the other end of the manual tripping rotating shaft.

[0011] Furthermore, the bottom end of the drive shaft extends movably to the underside of the push plate and is threadedly connected to an adjusting nut.

[0012] Furthermore, a position switch and a controller are respectively provided at the bottom of the inner wall of the fixed base.

[0013] Compared with existing technologies, the beneficial effects of this utility model are achieved through a unique top-bottom arrangement structure, which realizes a highly efficient and reliable operating mechanism. When forward energized, the contactor is attracted and maintains the attracted state by the residual magnetism of the semi-hard magnetic material, which can be maintained even when the power is off. When release is required, only reverse energization is needed, and the opening force is provided by the spring force, ensuring fast and reliable disconnection, reducing the need for continuous energization, significantly extending the service life of the contactor, greatly improving the reliability of operation, and reducing noise. The simplified structure reduces the number of parts, making the overall weight lighter, and the reduction in energy consumption not only reduces operating costs, but also achieves optimal matching of the attraction and reaction force characteristics, thereby reducing the burn-out of the contacts. It achieves no jitter operation at two critical voltages, and no auxiliary contacts are required during the control process. Modularization enhances flexibility and maintainability. The attraction and release actions are fast and accurate, unaffected by grid voltage interference, without chatter, with extremely high energy saving rate, silent operation and no temperature rise, avoiding long-term coil energization, and achieving energy saving effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side sectional view of the present invention. Figure 3 This is a front structural diagram of the present invention.

[0015] In the diagram: 1. Incoming copper busbar; 2. Fixed contact; 3. Moving contact; 4. Flexible connection copper busbar; 5. Insulator; 6. Drive rod; 7. Opening spring; 8. Semi-hard magnetic stationary iron core; 9. Drive coil; 10. Semi-hard magnetic moving iron core; 11. Adjusting nut; 12. Push plate; 13. Position switch; 14. Controller; 15. Manual opening operation component; 16. Manual opening rotating shaft; 17. Manual opening pressure plate; 18. Vacuum interrupter; 19. Support frame; 20. Fixed base; 21. Drive shaft. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-3 This utility model provides a technical solution: a magnetically controlled energy-saving 10kV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor, including a fixed base 20, and a push plate 12 that slides vertically in the lower part of the inner cavity of the fixed base 20.

[0018] A semi-hard magnetic moving iron core 10 is fixedly connected to the upper surface of the push plate 12, and a semi-hard magnetic stationary iron core 8 is fixedly connected to the top of the inner cavity of the fixed base 20. A tripping spring 7 is provided between the semi-hard magnetic moving iron core 10 and the semi-hard magnetic stationary iron core 8.

[0019] The inner cavity of the fixed base 20 is provided with a drive coil 9 that is compatible with the semi-hard magnetic moving iron core 10 and the semi-hard magnetic stationary iron core 8. A drive shaft 21 is fixedly connected to the semi-hard magnetic moving iron core 10. The top end of the drive shaft 21 is pulled out and extended above the semi-hard magnetic stationary iron core 8, and a drive rod 6 is fixedly connected to it laterally.

[0020] The top of the fixed base 20 is provided with an opening and closing mechanism driven by the drive rod 6, and the lower surface of the push plate 12 is provided with a manual tripping mechanism.

[0021] Employing a unique top-bottom arrangement structure, it achieves an efficient and reliable operating mechanism. When forward energized, the contactor is attracted and maintains the attracted state by the residual magnetism of the semi-hard magnetic material, which can be maintained even when the power is off. When release is required, only reverse energization is needed, and the opening force is provided by the spring force, ensuring fast and reliable disconnection, reducing the need for continuous energization, significantly extending the service life of the contactor, greatly improving the reliability of operation, and reducing noise.

[0022] The simplified structure reduces the number of parts and the overall weight. The reduced energy consumption not only lowers operating costs but also optimizes the attraction and reaction force characteristics, thereby reducing contact burn-out and achieving vibration-free operation at two critical voltages.

[0023] No auxiliary contacts are required during the control process. Modular design enhances flexibility and maintainability. The engagement and disengagement actions are rapid and accurate. It is unaffected by grid voltage interference, has no vibration, extremely high energy saving rate, operates silently and without temperature rise, and avoids long-term coil energization, thus achieving energy-saving effects.

[0024] The opening and closing mechanism includes three support frames 19, three corresponding insulators 5 and moving contacts 3. All three support frames 19 are fixedly connected to the top of the fixed base 20. A vacuum interrupter 18 is fixedly connected to the top of the inner wall of the support frame 19.

[0025] The insulator 5 is slidably disposed in the lower part of the inner cavity of the support frame 19 in a vertical direction. The bottom end of the insulator 5 is pulled out and extended into the inner cavity of the fixed seat 20, and is fixedly connected to the top of the drive rod 6.

[0026] A fixed contact 2 is fixedly connected to the top of the inner wall of the vacuum interrupter 18, and a moving contact 3 is fixedly connected to the top of the insulator 5, with the top of the contact extending to the upper part of the inner cavity of the vacuum interrupter 18.

[0027] The top of the semi-hard magnetic support frame 19 is fixedly connected to the incoming copper busbar 1, which is electrically connected to the fixed contact 2, and the surface of the support frame 19 is provided with a flexible connecting copper busbar 4, which is electrically connected to the moving contact 3.

[0028] High-voltage three-phase AC power is introduced into the main circuit of the contactor through the incoming copper busbar 1. The current is transmitted to the stationary contact 2 through the flexible copper busbar 4, forming a conductive path to be opened or closed. The drive coil 9 is energized to generate a magnetic field. The semi-hard magnetic stationary iron core 8 attracts the semi-hard magnetic moving iron core 10 to move downward. The semi-hard magnetic moving iron core 10 pushes the moving contact 3 to press against the stationary contact 2 through the push plate 12, and at the same time compresses the opening spring 7 to store energy, and the circuit is turned on.

[0029] The bottom end of the drive shaft 21 extends movably to the underside of the push plate 12 and is threadedly connected to an adjusting nut 11.

[0030] The adjusting nut 11 presets the preload of the opening spring 7 to ensure stable contact pressure when the coil is engaged. After the coil is de-energized, the semi-hard magnetic core 10 maintains the engaged state due to the residual magnetism of the semi-hard magnetic material, so there is no need to continuously energize it. The insulator 5 isolates the high-voltage components from the outer casing to prevent leakage and ensure safety.

[0031] The semi-hard magnetic moving iron core 10 and the semi-hard magnetic stationary iron core 8 are both provided with grooves on their opposite surfaces. The opening spring 7 is located between the two grooves and is movably covered outside the transmission shaft 21.

[0032] The manual tripping mechanism includes a manual tripping operation component 15, which is located at the bottom of the inner cavity of the fixed base 20. A manual tripping rotating shaft 16 is fixedly connected to the surface of the manual tripping operation component 15, and a manual tripping pressure plate 17 is fixedly connected to the other end of the manual tripping rotating shaft 16.

[0033] Normal tripping: When the coil is reverse-energized or the delayed release condition is met, the residual magnetism weakens, the tripping spring 7 releases energy, and pushes the moving contact 3 to separate from the fixed contact 2 through the push plate 12, thus cutting off the circuit.

[0034] Manual tripping: Rotate the manual tripping operating component 15 to drive the manual tripping rotating shaft 16 to rotate, which in turn drives the manual tripping pressure plate 17 to press down, forcing the moving contact 3 to separate, as an emergency backup measure.

[0035] The bottom of the inner wall of the fixed base 20 is provided with a position switch 13 and a controller 14 respectively. The semi-hard magnetic moving iron core 10 and the semi-hard magnetic stationary iron core 8 can be semi-hard magnetic materials that can be magnetized and demagnetized.

[0036] Position switch 13 detects the contact status and sends a feedback signal to controller 14 to confirm that the circuit breaker has been opened. Controller 14 receives remote commands or local signals and drives coil 9 to work. It supports communication, data acquisition and voltage threshold adjustment. In case of a fault, controller 14 triggers the protection mechanism or quickly cuts off the circuit by manually opening the circuit breaker.

[0037] During operation, high-voltage three-phase AC power is introduced into the contactor's main circuit through the incoming copper busbar 1. The current is transmitted to the stationary contact 2 via the flexible connecting copper busbar 4, forming a conductive path to be switched on and off. This drives the coil 9 to generate a magnetic field, which attracts the semi-hard magnetic stationary iron core 8, causing the semi-hard magnetic moving iron core 10 to move downwards. The semi-hard magnetic moving iron core 10 pushes the moving contact 3 to press against the stationary contact 2 via the push plate 12, simultaneously compressing the opening spring 7 to store energy, thus completing the circuit. The adjusting nut 11 presets the preload of the opening spring 7 to ensure stable contact pressure during engagement. After the coil is de-energized, the semi-hard magnetic moving iron core 10 maintains its engaged state due to the residual magnetism of the semi-hard magnetic material, eliminating the need for continuous energization. The insulator 5 isolates the high-voltage components from the casing, preventing leakage and ensuring safety. When the coil is energized in the reverse direction or the delayed release condition is met, the residual magnetism disappears, the opening spring 7 releases energy, and pushes the moving contact 3 away from the stationary contact 2 via the push plate 12, thus cutting off the circuit. Rotate the manual tripping control component 15 to drive the manual tripping rotating shaft 16 to rotate, which in turn drives the manual tripping pressure plate 17 to press down, forcing the moving contact 3 to separate as an emergency backup measure.

[0038] 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.

[0039] 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 energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor, comprising a fixed base (20), characterized in that: The lower part of the inner cavity of the fixed base (20) is provided with a push plate (12) that slides in the vertical direction. A semi-hard magnetic moving iron core (10) is fixedly connected to the upper surface of the push plate (12). A semi-hard magnetic stationary iron core (8) is fixedly connected to the top of the inner cavity of the fixed base (20). A stop spring (7) is provided between the semi-hard magnetic moving iron core (10) and the semi-hard magnetic stationary iron core (8). The inner cavity of the fixed base (20) is provided with a drive coil (9) that is compatible with the semi-hard magnetic moving iron core (10) and the semi-hard magnetic stationary iron core (8). A transmission shaft (21) is fixedly connected to the semi-hard magnetic moving iron core (10). The top end of the transmission shaft (21) is pulled out and extended to the top of the semi-hard magnetic stationary iron core (8), and a drive rod (6) is fixedly connected laterally. The top of the fixed base (20) is provided with an opening and closing mechanism for the switch driven by the drive rod (6). The lower surface of the push plate (12) is provided with a manual opening mechanism.

2. The magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 1, characterized in that: The opening and closing mechanism includes three support frames (19), three corresponding insulators (5) and a moving contact (3). The three support frames (19) are all fixedly connected to the top of the fixed base (20). A vacuum interrupter (18) is fixedly connected to the top of the inner wall of the support frame (19). The insulator (5) is slidably disposed in the lower part of the inner cavity of the support frame (19) in the vertical direction. The bottom end of the insulator (5) is pulled out and extended to the inner cavity of the fixed base (20) and is fixedly connected to the top of the drive rod (6). A fixed contact (2) is fixedly connected to the top of the inner wall of the vacuum interrupter (18). The moving contact (3) is fixedly connected to the top of the insulator (5) and the top end is pulled out and extended to the upper part of the inner cavity of the vacuum interrupter (18).

3. A magnetically controlled energy-saving 10kV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 2, characterized in that: The top of the support frame (19) is fixedly connected to the incoming copper busbar (1) which is electrically connected to the fixed contact (2), and the surface of the support frame (19) is provided with a flexible connecting copper busbar (4) which is electrically connected to the moving contact (3).

4. The magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 1, characterized in that: The semi-hard magnetic moving iron core (10) and the semi-hard magnetic stationary iron core (8) are both provided with grooves on their opposite surfaces. The opening spring (7) is located between the two grooves and is movably covered outside the transmission shaft (21).

5. A magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 1, characterized in that: The manual tripping mechanism includes a manual tripping operation component (15), which is located at the bottom of the inner cavity of the fixed base (20). A manual tripping rotating shaft (16) is fixedly connected to the surface of the manual tripping operation component (15), and a manual tripping pressure plate (17) is fixedly connected to the other end of the manual tripping rotating shaft (16).

6. A magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 1, characterized in that: The bottom end of the drive shaft (21) extends movably to the underside of the push plate (12) and is threadedly connected to an adjusting nut (11).

7. A magnetically controlled energy-saving 10KV high-voltage three-phase single-mechanism direct-acting vacuum AC contactor according to claim 1, characterized in that: The bottom of the inner wall of the fixed base (20) is provided with a position switch (13) and a controller (14).

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