Permanent magnet operating mechanism for 1.5 kV direct current circuit breaker

Abstract

The utility model discloses a permanent magnet operating mechanism for a 1.5 kV direct current circuit breaker, and belongs to the technical field of permanent magnet operating mechanisms, the permanent magnet operating mechanism comprises a front end plate and a rear end plate, two side plates are fixedly mounted between the front end plate and the rear end plate through mounting bolts, a coil assembly is arranged between the two side plates, and an adjusting groove is formed in the coil assembly; the coil assembly, the movable iron core, the magnetic pole and the driving block are matched to realize closing and opening operation of the direct current circuit breaker, the movable iron core is fixedly sleeved with the movable ring for guiding the movable iron core to move and providing additional support for the movable iron core, and the rigidity and the pre-tightening force of the spring are adjusted to adjust the rigidity and the pre-tightening force of the spring, so that the opening and closing operation of the direct current circuit breaker is realized. The movement speed and the movement distance of the movable iron core are controlled, so that accurate control and operation are achieved, the spring can be used for storing energy, when the electromagnetic driving structure breaks down, elastic restoring force can be provided for movement of the movable iron core through the spring to achieve opening, and the safety of the device in use is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of permanent magnet operating mechanisms, and in particular to a permanent magnet operating mechanism for a 1.5 kV DC circuit breaker. Background Art

[0002] With the advancement of science and technology and the progress of society, the requirements for the stability and automation of power systems are becoming increasingly stringent. As crucial electrical equipment in power systems, circuit breakers have attracted considerable attention. DC circuit breakers, due to their high reliability, stability, maintenance-free operation, and long life, have long maintained a leading position in the switchgear industry. Since the fundamental function of a circuit breaker lies in the opening and closing of its contacts, which is achieved through the permanent magnetic operating mechanism within the circuit breaker, the performance and quality of the permanent magnetic operating mechanism play a crucial role in the performance and reliability of the DC circuit breaker.

[0003] The permanent magnet operating mechanism is an important component of the permanent magnet DC circuit breaker. The permanent magnet operating mechanism is an operating mechanism that utilizes permanent magnet holding and electromagnetic drive. The permanent magnet holding and electromagnetic drive have good stability and can effectively prevent accidental closing and opening. However, when the electromagnetic drive structure fails, the permanent magnet operating mechanism is difficult to achieve opening, and thus has poor reliability, thereby losing control of the high-voltage power supply and easily causing danger. Therefore, improvements are now made to a permanent magnet operating mechanism for 1.5kV DC circuit breakers. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application provides a permanent magnetic operating mechanism for a 1.5kV DC circuit breaker, which overcomes the shortcomings of the existing technology and aims to solve the problem that when the electromagnetic drive structure fails, the permanent magnetic operating mechanism is difficult to open the circuit, resulting in poor reliability, thereby losing control of the high-voltage power supply and easily causing danger.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a permanent magnetic operating mechanism for a 1.5kV DC circuit breaker, comprising a front end plate and a rear end plate, two side plates fixedly installed between the front end plate and the rear end plate by mounting bolts, and a coil assembly is arranged between the two side plates, an adjustment groove is opened inside the coil assembly, a moving iron core is slidably inserted inside the adjustment groove, a magnetic pole is fixedly installed inside the adjustment groove on the outside of the moving iron core, a moving ring is fixedly sleeved on the outer surface of the moving iron core, and the moving ring is fixedly connected to the rear end plate by a spring, the two ends of the moving iron core slide through the front end plate and the rear end plate respectively and extend to the outside, and a drive block is fixedly installed on the end of the moving iron core close to the rear end plate.

[0006] By adopting the above technical solution, the closing and opening operations of the DC circuit breaker are realized through the cooperation between the coil assembly, the moving iron core, the magnetic pole and the drive block. A movable ring is fixedly sleeved on the moving iron core to guide the movement of the moving iron core and provide additional support thereto. By adjusting the stiffness and preload of the spring, the movement speed and movement distance of the moving iron core are controlled, thereby achieving precise control and operation. The spring can be used to store energy. When the electromagnetic drive structure fails, the spring can provide elastic restoring force for the movement of the moving iron core to achieve opening, thereby ensuring the safety of the device during use.

[0007] As a preferred technical solution of the present application, the outer wall of the front end plate is fixedly installed with a limiting block by installing bolts, the moving iron core slides inside the limiting block, a limiting groove is provided on the side of the limiting block away from the front end plate, and the outer surface of the moving iron core is located on one side of the limiting block and is fixedly connected with a positioning block adapted to the limiting groove.

[0008] By adopting the above technical solution, it is ensured that the moving iron core can accurately remain on the predetermined path during movement to prevent it from deviating, and through the cooperation between the limit slot and the positioning block, it is ensured that the moving iron core will not deviate from its predetermined position under extreme conditions, thereby improving the stability and reliability of the entire system.

[0009] As a preferred technical solution of the present application, the movable ring slides inside the adjusting groove, and the outer diameter of the movable ring is adapted to the inner diameter of the adjusting groove.

[0010] By adopting the above technical solution, it is ensured that the moving ring can slide freely inside the adjusting groove, so that the moving iron core can be supported by the moving ring.

[0011] As a preferred technical solution of the present application, the coil assembly is electrically connected to an external power source through an electric wire, and a pole shoe assembly is fixedly installed on one side of the coil assembly between two side plates.

[0012] By adopting the above technical solution, the coil assembly is electrically connected to the external power supply through wires and controls the magnetic field strength and direction of the magnetic pole according to the generation and change of the external current, thereby affecting the action of the permanent magnet operating mechanism, and optimizing the distribution and strength of the magnetic field by setting the pole shoe assembly.

[0013] As a preferred technical solution of the present application, movable sleeves are fixedly installed inside the front end plate and the rear end plate, the inner wall of the movable sleeve is smoothly set, the moving iron core is inside the movable sleeve and its outer wall is in contact with the inner wall of the movable sleeve.

[0014] By adopting the above technical solution and providing a movable sleeve to reduce friction, the movable iron core can move back and forth freely inside the front end plate and the rear end plate.

[0015] As a preferred technical solution of the present application, mounting brackets are fixedly mounted on the tops of the front end plate and the rear end plate, a screw rod is rotatably connected inside the mounting bracket, and a nut push plate is threadedly connected to the outer surface of the screw rod.

[0016] By adopting the above technical solution, the lead screw and nut push plate in the permanent magnet operating mechanism are mainly used to convert rotational motion into linear motion and achieve precise displacement control.

[0017] As a preferred technical solution of the present application, two bearing seats are symmetrically provided on the outer surface of the screw rod, the bearing seats are fixedly mounted inside the mounting frame, and the screw rod is movably connected to the mounting frame through the bearing seats.

[0018] By adopting the above technical solution, the screw rod is connected to the mounting frame through the bearing seat, and a movable connection of the screw rod relative to the mounting frame is achieved, so that the screw rod can rotate freely inside the mounting frame without worrying about poor movement due to friction or resistance.

[0019] As a preferred technical solution of the present application, a blocking block is fixedly inserted on the outer surface of the screw rod on one side of the nut push plate, and one end of the screw rod passes through the mounting frame through the bearing seat and is fixedly connected to the rotating rod.

[0020] By adopting the above technical solution, the movement trajectory of the nut push plate is limited by setting a resistance block. When the rotating rod is rotated, it will drive the screw rod to rotate together, thereby realizing the relative movement between the screw rod and the nut push plate and adjusting the position of the nut push plate.

[0021] Beneficial effects of this application:

[0022] In the utility model, the closing and opening operations of the DC circuit breaker are realized by the cooperation between the set coil assembly, the moving iron core, the magnetic pole and the drive block. A movable ring is fixedly sleeved on the moving iron core to guide the movement of the moving iron core and provide additional support thereto. The movement speed and movement distance of the moving iron core are controlled by adjusting the stiffness and preload of the spring, thereby realizing precise control and operation. The spring can be used to store energy. When the electromagnetic drive structure fails, the spring can provide elastic restoring force for the movement of the moving iron core to realize opening, thereby ensuring the safety of the device during use.

[0023] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention may be employed. It should be understood that the scope of the embodiments of the present invention is not limited thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present application;

[0026] Figure 3 This is a schematic diagram of the top view of the structure of this application;

[0027] Figure 4 This is a schematic diagram of the local structure of this application.

[0028] In the figure: 1. Front end plate; 2. Rear end plate; 3. Side plate; 4. Coil assembly; 5. Wire; 6. Adjustment slot; 7. Moving iron core; 8. Drive block; 9. Magnetic pole; 10. Pole shoe assembly; 11. Moving ring; 12. Spring; 13. Mounting bolt; 14. Limit block; 15. Limit slot; 16. Positioning block; 17. Mounting frame; 18. Bearing seat; 19. Screw; 20. Nut push plate; 21. Rotating rod; 22. Stop block; 23. Movable sleeve. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] like Figure 1 - Figure 4As shown, the present embodiment provides a permanent magnetic operating mechanism for a 1.5kV DC circuit breaker, comprising a front end plate 1 and a rear end plate 2, characterized in that two side plates 3 are fixedly installed between the front end plate 1 and the rear end plate 2 by mounting bolts 13, and a coil assembly 4 is provided between the two side plates 3, an adjustment slot 6 is provided inside the coil assembly 4, a moving iron core 7 is slidably inserted inside the adjustment slot 6, a magnetic pole 9 is fixedly installed inside the adjustment slot 6 on the outside of the moving iron core 7, a moving ring 11 is fixedly sleeved on the outer surface of the moving iron core 7, and the moving ring 11 is fixedly connected to the rear end plate 2 by a spring 12, and the two ends of the moving iron core 7 slide through the front end plate 1 and the rear end plate 2 respectively and extend to the outside, and the moving iron core 7 is fixed to the rear end plate 2 by a spring 12. A drive block 8 is fixedly installed at one end of the iron core 7 close to the rear end plate 2. When in use, the closing and opening operations of the DC circuit breaker are realized through the cooperation between the coil assembly 4, the moving iron core 7, the magnetic pole 9 and the drive block 8. A moving ring 11 is fixedly sleeved on the moving iron core 7 to guide the movement of the moving iron core 7 and provide additional support thereto. The movement speed and distance of the moving iron core 7 can be controlled by adjusting the stiffness and preload of the spring 12, thereby achieving precise control and operation. The spring 12 can be used to store energy. When the electromagnetic drive structure fails, the spring 12 can provide elastic restoring force for the movement of the moving iron core 7 to achieve opening, thereby ensuring the safety of the device during use.

[0031] In this embodiment, if Figure 1 and 4 As shown, the outer wall of the front end plate 1 is fixedly installed with a limit block 14 by installing bolts 13, and the moving iron core 7 slides inside the limit block 14. The limit slot 15 is provided on the side of the limit block 14 away from the front end plate 1. The outer surface of the moving iron core 7 is located on one side of the limit block 14 and is fixedly connected with a positioning block 16 adapted to the limit slot 15. When in use, it is ensured that the moving iron core 7 can accurately maintain a predetermined path during movement to prevent it from deviating, and through the cooperation between the limit slot 15 and the positioning block 16, it is ensured that the moving iron core 7 will not deviate from its predetermined position under extreme conditions, thereby improving the stability and reliability of the entire system.

[0032] In this embodiment, if Figure 2 As shown, the movable ring 11 slides inside the adjusting groove 6, and the outer diameter of the movable ring 11 is adapted to the inner diameter of the adjusting groove 6. When in use, it is ensured that the movable ring 11 can slide freely inside the adjusting groove 6 so as to support the moving iron core 7 through the movable ring 11.

[0033] In this embodiment, if Figure 2As shown, the coil assembly 4 is electrically connected to the external power supply through the wire 5, and a pole shoe assembly 10 is fixedly installed on one side of the coil assembly 4 between the two side plates 3. When in use, the coil assembly 4 is electrically connected to the external power supply through the wire 5 and controls the magnetic field strength and direction of the magnetic pole 9 according to the generation and change of the external current, thereby affecting the action of the permanent magnet operating mechanism. The distribution and strength of the magnetic field are optimized by setting the pole shoe assembly 10.

[0034] In this embodiment, if Figure 2 As shown, a movable sleeve 23 is fixedly installed inside the front end plate 1 and the rear end plate 2. The inner wall of the movable sleeve 23 is smoothly set. The movable iron core 7 is inside the movable sleeve 23 and its outer wall fits with the inner wall of the movable sleeve 23. When in use, the movable sleeve 23 is provided to reduce friction, so that the movable iron core 7 can move back and forth freely inside the front end plate 1 and the rear end plate 2.

[0035] In this embodiment, if Figure 1 and 3 As shown, a mounting bracket 17 is fixedly mounted on the top of the front end plate 1 and the rear end plate 2. The interior of the mounting bracket 17 is rotatably connected to a screw rod 19, and the outer surface of the screw rod 19 is threadedly connected to a nut push plate 20. When in use, the screw rod 19 and the nut push plate 20 in the permanent magnetic operating mechanism are mainly used to convert rotational motion into linear motion and achieve precise displacement control.

[0036] In this embodiment, if Figure 1 and 3 As shown, two bearing seats 18 are symmetrically provided on the outer surface of the screw rod 19, and the bearing seats 18 are fixedly mounted inside the mounting frame 17, and the screw rod 19 is movably connected to the mounting frame 17 through the bearing seats 18. When in use, the screw rod 19 is connected to the mounting frame 17 through the bearing seats 18, and the movable connection of the screw rod 19 relative to the mounting frame 17 is realized, so that the screw rod 19 can rotate freely inside the mounting frame 17 without worrying about poor movement due to friction or resistance.

[0037] In this embodiment, if Figure 1 and 3 As shown, the outer surface of the screw rod 19 is located on one side of the nut push plate 20 and is fixedly plugged with a blocking block 22. One end of the screw rod 19 passes through the mounting frame 17 through the bearing seat 18 and is fixedly connected to the rotating rod 21. When in use, the movement trajectory of the nut push plate 20 is limited by setting the blocking block 22. When the rotating rod 21 is rotated, it drives the screw rod 19 to rotate together, thereby realizing the relative movement between the screw rod 19 and the nut push plate 20 and adjusting the position of the nut push plate 20.

[0038] Working principle: When using a permanent magnetic operating mechanism for a 1.5kV DC circuit breaker of the present application, the closing and opening operations of the DC circuit breaker are realized through the cooperation between the set coil assembly 4, the moving iron core 7, the magnetic pole 9 and the drive block 8. A moving ring 11 is fixedly sleeved on the moving iron core 7 to guide the movement of the moving iron core 7 and provide additional support thereto. By adjusting the stiffness and preload of the spring 12, the movement speed and movement distance of the moving iron core 7 are controlled, thereby achieving precise control and operation. The spring 12 can be used to store energy. When the electromagnetic drive structure fails, the spring 12 can provide elastic restoring force for the movement of the moving iron core 7 to achieve opening, thereby ensuring the safety of the device during use.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0041] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make various modifications and variations to the present invention based on the spirit and principles of the present invention, and such modifications and variations are also within the scope of the present invention.

Claims

1. A permanent magnetic operating mechanism for a 1.5 kV DC circuit breaker, comprising a front end plate (1) and a rear end plate (2), characterized in that: Two side plates (3) are fixedly installed between the front end plate (1) and the rear end plate (2) by means of mounting bolts (13), and a coil assembly (4) is provided between the two side plates (3), an adjustment slot (6) is provided inside the coil assembly (4), a moving iron core (7) is slidably inserted inside the adjustment slot (6), a magnetic pole (9) is fixedly installed inside the adjustment slot (6) on the outside of the moving iron core (7), a moving ring (11) is fixedly sleeved on the outer surface of the moving iron core (7), and the moving ring (11) is fixedly connected to the rear end plate (2) through a spring (12), two ends of the moving iron core (7) respectively slide through the front end plate (1) and the rear end plate (2) and extend to the outside, and a driving block (8) is fixedly installed on one end of the moving iron core (7) close to the rear end plate (2).

2. A permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 1, characterized in that: The outer wall of the front end plate (1) is fixedly mounted with a limit block (14) by means of mounting bolts (13); the movable iron core (7) slides inside the limit block (14); a limit slot (15) is provided on a side of the limit block (14) away from the front end plate (1); and an outer surface of the movable iron core (7) is located on one side of the limit block (14) and is fixedly connected with a positioning block (16) adapted to the limit slot (15).

3. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 1, characterized in that: The movable ring (11) slides inside the adjustment groove (6), and the outer diameter of the movable ring (11) is adapted to the inner diameter of the adjustment groove (6).

4. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 1, characterized in that: The coil assembly (4) is electrically connected to an external power source via an electric wire (5), and a pole shoe assembly (10) is fixedly mounted on one side of the coil assembly (4) between the two side plates (3).

5. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 1, characterized in that: A movable sleeve (23) is fixedly mounted inside the front end plate (1) and the rear end plate (2), the inner wall of the movable sleeve (23) is smooth, the movable iron core (7) is located inside the movable sleeve (23) and the outer wall of the movable iron core (7) is in contact with the inner wall of the movable sleeve (23).

6. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 1, characterized in that: A mounting frame (17) is fixedly mounted on the top of each of the front end plate (1) and the rear end plate (2); a screw rod (19) is rotatably connected to the inside of the mounting frame (17); and a nut push plate (20) is threadedly connected to the outer surface of the screw rod (19).

7. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 6, characterized in that: Two bearing seats (18) are symmetrically provided on the outer surface of the screw rod (19), and the bearing seats (18) are fixedly mounted inside the mounting frame (17), and the screw rod (19) is movably connected to the mounting frame (17) through the bearing seats (18).

8. The permanent magnetic operating mechanism for a 1.5kV DC circuit breaker according to claim 7, characterized in that: The outer surface of the screw rod (19) is located on one side of the nut push plate (20) and is fixedly connected with a blocking block (22). One end of the screw rod (19) passes through the mounting frame (17) through the bearing seat (18) and is fixedly connected to the rotating rod (21).

Images