Manual switch-on and switch-off device of permanent magnet vacuum circuit breaker

Abstract

The utility model discloses a manual opening and closing device of a permanent magnet vacuum circuit breaker, which comprises a circuit breaker shell and an auxiliary opening mechanism, and the upper surface of the circuit breaker shell is fixedly connected with uniformly distributed vacuum arc extinguishing cabins; the auxiliary opening mechanism comprises mounting seats, sliding blocks, sliding rods, third springs and fourth springs, the mounting seats are fixedly connected to the left side and the right side of the interior of the circuit breaker shell, the sliding blocks are slidably connected to the right sides of the interiors of the mounting seats, and the third springs are fixedly connected between the outer surfaces of the sliding blocks and the upper surfaces of the mounting seats. Sliding rods are slidably connected in the sliding blocks, clamping blocks are fixedly connected to the lower sides of the outer surfaces of the sliding rods, and springs IV are fixedly connected between the upper surfaces of the clamping blocks and the lower surfaces of the sliding blocks. According to the manual opening and closing device of the permanent magnet vacuum circuit breaker, the arc extinguishing time is shortened, and the situations of contact burning loss, circuit breaker oil injection, explosion of an arc extinguishing chamber and the like are avoided; and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of power system control equipment technology, specifically a manual opening and closing device for a permanent magnet vacuum circuit breaker. Background Technology

[0002] Specifically, permanent magnet vacuum circuit breakers achieve efficient circuit control through the combination of permanent magnets and electromagnets. In high-voltage, high-current fields such as power systems and electric vehicle charging stations, permanent magnet vacuum circuit breakers can quickly and accurately disconnect or close circuits, thereby protecting the safety of transmission lines, power generation equipment, and loads. However, permanent magnet systems require electricity to operate. In special circumstances such as power failure or motor failure, the circuit is connected or disconnected manually to ensure the safe and stable operation of the power system.

[0003] In the prior art, patent CN113745046A discloses a sliding permanent magnet mechanism manual opening and closing device, including a housing, a vacuum bulb, a permanent magnet mechanism, and a manual opening and closing mechanism. The housing is horizontally positioned and is a hollow rectangular structure with an open bottom, with a partition plate horizontally welded to its center. A rectangular slot is provided on the front end face of the housing, located above the partition plate. The vacuum bulb is fixed to the upper surface of the housing, and its pole rod extends downward through the upper surface of the housing. Three vacuum bulbs are spaced apart, with a linkage plate connected to the pole rods of the two end vacuum bulbs. The pole rod of the middle vacuum bulb extends towards the linkage plate, and a threaded sleeve is threaded to the lower end of the pole rod of the middle vacuum bulb. The permanent magnet mechanism is fixed to the partition plate and located directly below the middle vacuum bulb.

[0004] The manual opening and closing device of this type of sliding permanent magnet mechanism has the following disadvantages: by manually rotating the hand lever, a pulling force is generated to drive the linkage plate to move, which in turn moves the pole column to complete the opening and closing process. When opening the circuit, the opening speed is the same as the manual pulling speed. The manual pulling of the pole column will make the opening speed slower, resulting in a longer arc extinguishing time, which can easily lead to serious consequences such as contact burning, circuit breaker oil spraying, and arc extinguishing chamber explosion. To address this, we propose a manual opening and closing device for a permanent magnet vacuum circuit breaker. Utility Model Content

[0005] The technical problem this utility model aims to solve is to overcome existing defects and provide a manual opening and closing device for a permanent magnet vacuum circuit breaker. Through an auxiliary opening mechanism, the operator stores energy in the spring inside the auxiliary opening mechanism during the opening operation. When the energy is stored to a certain level, the spring force is released, which drives the slide rod to quickly push the connecting plate to move, thereby quickly separating the contact point between the fixed conductive rod and the moving conductive rod. This reduces the arc extinguishing time, avoids contact burnout, circuit breaker oil spraying, and arc extinguishing chamber explosion, and improves safety. It can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a manual opening and closing device for a permanent magnet vacuum circuit breaker, comprising a circuit breaker housing, wherein uniformly distributed vacuum arc-extinguishing chambers are fixedly connected to the upper surface of the circuit breaker housing, characterized in that: it further comprises an auxiliary opening mechanism;

[0007] Auxiliary tripping mechanism: It includes a mounting base, a slider, a sliding rod, spring three, and spring four. The mounting base is fixedly connected to the left and right sides of the inside of the circuit breaker housing. A slider is slidably connected to the right side of the inside of the mounting base. Spring three is fixedly connected between the outer surface of the slider and the upper surface of the mounting base. A sliding rod is slidably connected to the inside of the slider. A locking block is fixedly connected to the lower side of the outer surface of the sliding rod. Spring four is fixedly connected between the upper surface of the locking block and the lower surface of the slider. Through the auxiliary tripping mechanism, when the operator performs the tripping operation, the springs inside the auxiliary tripping mechanism store energy. When the energy is stored to a certain extent, the spring force is released, which drives the sliding rod to quickly push the connecting plate to move, thereby quickly separating the contact point between the fixed conductive rod and the moving conductive rod, thereby reducing the arc extinguishing time, avoiding contact burnout, circuit breaker oil spraying, and arc extinguishing chamber explosion, and improving safety.

[0008] Furthermore, a microcontroller is installed on the outside of the circuit breaker housing. The input terminal of the microcontroller is electrically connected to an external power source to control the on / off state of the electromagnetic coil and the direction of the internal current after the electromagnetic coil is energized.

[0009] Furthermore, the auxiliary tripping mechanism also includes a push rod, a movable column, a spring, and a limit pin. The push rods are all slidably connected to the inner left side of the mounting base, and the upper ends of the push rods are all fixedly connected to the lower surface of the slider on the same side. The movable columns are all slidably connected to the inner left side of the mounting base, and each movable column has a sliding groove inside. The lower ends of the push rods are all slidably connected to the inner wall of the sliding groove on the same side. A spring is fixedly connected between the left surface of the movable column and the inner wall of the mounting base on the same side. The right end of the movable column is all fitted with a locking block on the same side. A limit pin is fixedly connected to the outer surface of the movable column. A limit groove is opened on the lower surface of the mounting base, and the limit pin is slidably connected to the inside of the limit groove on the same side to release the stored energy of the spring.

[0010] Furthermore, sealing covers are fixedly connected to both the upper and lower surfaces of the vacuum interrupter chamber. Fixed conductive rods are fixedly connected to the interior of the upper sealing cover, and movable conductive rods are slidably connected to the interior of the lower sealing cover. Contact points are fixedly connected to the lower ends of the fixed conductive rods and the upper ends of the movable conductive rods. Shielding cylinders are fixedly connected to the interior of the vacuum interrupter chamber. The lower ends of the three movable conductive rods are fixedly connected to a connecting plate to transmit power and reduce the generation of electric arcs.

[0011] Furthermore, a moving magnetic core is slidably connected to the upper side of the outer surface of the slide rod, and permanent magnet coils are fixedly connected to the left and right sides of the inner upper surface of the circuit breaker housing. The permanent magnet coils are all fixedly connected directly above the moving magnetic core on the same side. The input end of the permanent magnet coil is electrically connected to the output end of the microcontroller, so that a magnetic field is generated inside the permanent magnet coil to control the switching of the circuit breaker.

[0012] Furthermore, a rotating rod is rotatably connected to both the left and right sides of the inside of the circuit breaker housing. A toggle block is fixedly connected to the middle of the outer surface of the rotating rod. A spring is fixedly connected between the outer surface of the toggle block and the inner upper surface of the circuit breaker housing. A bevel gear is fixedly connected to the rear side of the outer surface of the rotating rod. A drive shaft is rotatably connected to the upper side of the inner rear surface of the circuit breaker housing. Bevel gears are fixedly connected to both the left and right sides of the outer surface of the drive shaft. The bevel gears mesh with the bevel gears on the same side. A handle is fixedly connected to the front end of the rotating rod for easy manual tripping.

[0013] Furthermore, a rotating rod two is rotatably connected to the lower inner side of the circuit breaker housing, and a toggle block two is fixedly connected to the middle of the outer surface of the rotating rod two. A spring two is fixedly connected between the outer surface of the toggle block two and the lower inner surface of the circuit breaker housing. A handle is also fixedly connected to the front end of the rotating rod two for easy manual closing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The manual opening and closing device of this permanent magnet vacuum circuit breaker has the following advantages:

[0015] The auxiliary tripping mechanism allows the operator to store energy in the spring inside the mechanism during tripping operations. Once the energy reaches a certain level, the spring force is released, causing the slide rod to quickly push the connecting plate, thereby rapidly separating the contact point between the stationary and moving conductive rods. This reduces the arc extinguishing time, prevents contact burn-out, circuit breaker oil spraying, and arc extinguishing chamber explosion, and improves safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 4 This is a top view sectional structural diagram of the present invention;

[0020] Figure 5 This is a front view cross-sectional structural diagram of the auxiliary tripping mechanism of this utility model.

[0021] In the diagram: 1 Circuit breaker housing, 2 Vacuum arc extinguishing chamber, 3 Handle, 4 Microcontroller, 5 Auxiliary tripping mechanism, 51 Mounting base, 52 Slider, 53 Sliding rod, 54 Spring 3, 55 Spring 4, 56 Top rod, 57 Movable column, 58 Spring 5, 59 Limit pin, 6 Sealing cover plate, 7 Fixed conductive rod, 8 Moving conductive rod, 9 Shielding cylinder, 10 Connecting plate, 11 Moving magnetic core, 12 Toggle block 1, 13 Rotating rod 1, 14 Spring 1, 15 Rotating rod 2, 16 Spring 2, 17 Toggle block 2, 18 Bevel gear 1, 19 Bevel gear 2. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5This embodiment provides a technical solution: a manual opening and closing device for a permanent magnet vacuum circuit breaker, including a circuit breaker housing 1. Uniformly distributed vacuum interrupting chambers 2 are fixedly connected to the upper surface of the circuit breaker housing 1. Sealing covers 6 are fixedly connected to both the upper and lower surfaces of the vacuum interrupting chambers 2. Fixed conductive rods 7 are fixedly connected inside the upper sealing cover 6, and movable conductive rods 8 are slidably connected inside the lower sealing cover 6. Contact points are fixedly connected to the lower ends of the fixed conductive rods 7 and the upper ends of the movable conductive rods 8. Each component is internally fixedly connected to a shielding cylinder 9. The lower ends of the three moving conductive rods 8 are all fixedly connected to a connecting plate 10. A microcontroller 4 is installed on the outside of the circuit breaker housing 1. The input terminal of the microcontroller 4 is electrically connected to an external power supply. Rotating rods 13 are rotatably connected to the left and right sides inside the circuit breaker housing 1. A toggle block 12 is fixedly connected to the middle of the outer surface of the rotating rod 13. A spring 14 is fixedly connected between the outer surface of the toggle block 12 and the upper inner surface of the circuit breaker housing 1. A cone is fixedly connected to the rear side of the outer surface of the rotating rod 13. Gear 18 is rotatably connected to the upper side of the inner rear surface of the circuit breaker housing 1. Bevel gears 19 are fixedly connected to both sides of the outer surface of the drive shaft. Each bevel gear 19 meshes with bevel gear 18 on the same side. A handle 3 is fixedly connected to the front end of rotating rod 13. Rotating the upper handle 3 causes rotating rod 13 to rotate, which in turn rotates bevel gear 18, causing bevel gear 19 to rotate. This causes rotating rods 13 on both sides to rotate synchronously, driving the actuating block 12 to rotate. Spring 14 is stretched, releasing the upper handle 3. Spring 14 contracts, pulling the actuating block 12 to reverse and reset. A rotating rod 15 is rotatably connected to the lower inner side of the circuit breaker housing 1. A actuating block 17 is fixedly connected to the middle of the outer surface of the rotating rod 15. A spring 16 is fixedly connected between the outer surface of the actuating block 17 and the lower inner surface of the circuit breaker housing 1. A handle 3 is also fixedly connected to the front end of the rotating rod 15. Rotating the lower handle 3 causes the rotating rod 15 to rotate, which drives the actuating block 17 to rotate and the spring 16 to extend. The feature is that it also includes an auxiliary tripping mechanism 5.

[0024] Auxiliary tripping mechanism 5: It includes a mounting base 51, a slider 52, a sliding rod 53, a third spring 54, and a fourth spring 55. The mounting base 51 is fixedly connected to the left and right sides of the inside of the circuit breaker housing 1. The slider 52 is slidably connected to the right side of the inside of the mounting base 51. The third spring 54 is fixedly connected between the outer surface of the slider 52 and the upper surface of the mounting base 51. The sliding rod 53 is slidably connected to the inside of the slider 52. The lower side of the outer surface of the sliding rod 53 is fixedly connected to a locking block. The upper surface of the locking block is fixedly connected between the lower surface of the slider 52 and the lower surface of the slider 52. The auxiliary tripping mechanism 5 also includes a push rod 56, a movable column 57, a fifth spring 58, and a limit pin 59. The push rod 56 is slidably connected to the left side of the inside of the mounting base 51. The upper end of the push rod 56 is fixed. On the lower surface of the slider 52 connected to the same side, and on the left side of the interior of the mounting base 51, there are movable columns 57 slidably connected. Each movable column 57 has a groove inside. The lower end of the push rod 56 is slidably connected to the inner wall of the groove on the same side. A spring 58 is fixedly connected between the left surface of the movable column 57 and the inner wall of the mounting base 51 on the same side. The right end of the movable column 57 is fitted with a locking block on the same side. A limit pin 59 is fixedly connected to the outer surface of the movable column 57. A limit groove is opened on the lower surface of the mounting base 51. The limit pin 59 is slidably connected to the limit groove on the same side. When the distal end of the actuating block 12 presses the slider 52, the slider 52 moves downward. Spring 3 64 contracts, spring 4 55 contracts, and simultaneously drives the push rod 56 downward, causing the push rod 56 to move downward. The lower end of the slide is pressed against the groove, causing the movable column 57 to move to the left. Spring 58 contracts. When the plane at the right end of the movable column 57 separates from the lower surface of the locking block, spring 45 relaxes, instantly pushing the locking block downwards, causing the slide rod 53 to move downwards, causing the connecting plate 10 to move downwards, and causing the moving conductive rod 8 to move downwards quickly, thus separating the connecting contact at the upper end of the moving conductive rod 8 from the connecting contact at the lower end of the fixed conductive rod 7, completing the power cut-off. The distal end of the moving block 2 17 presses against the connecting plate 10. At this time, the connecting plate 10 moves upwards, causing the slide rod 53 to move upwards, causing the locking block to move upwards. Sliding and pressing occur between the inclined surface 1 of the locking block and the inclined surface 2 at the right end of the movable column 57, causing the movable column 57 to move upwards. Spring 58 contracts until the locking block moves to the upper side of the inclined surface 2. When the moving conductive rod 8 moves upward, the connecting contact on the upper side of the moving conductive rod 8 connects with the conductive contact on the lower side of the fixed conductive rod 7, thus completing the closing. Moving magnetic cores 11 are slidably connected to the upper surface of the slide rod 53. Permanent magnet coils are fixedly connected to both sides of the upper inner surface of the circuit breaker housing 1. The permanent magnet coils are all fixedly connected directly above the moving magnetic cores on the same side. The input terminals of the permanent magnet coils are electrically connected to the output terminals of the microcontroller 4. When using the permanent magnet coils for opening, the electromagnetic coil is energized, generating a magnetic field within it. This causes the electromagnetic coil and the moving magnetic core 11 to repel each other, causing the moving magnetic core 11 to move downward and push the slider 52 downward, thus completing the opening. When closing, the direction of the current inside the electromagnetic coil is reversed, generating an opposite magnetic field within the electromagnetic coil that attracts the moving magnetic core.This causes the moving magnetic core 11 to move upward, which in turn moves the sliding rod 53 upward, completing the closing process as described above.

[0025] The working principle of the manual opening and closing device for a permanent magnet vacuum circuit breaker provided by this utility model is as follows: When performing manual opening operation using the manual opening and closing device of this permanent magnet vacuum circuit breaker, rotate the upper handle 3 to rotate the rotating rod 13, which in turn rotates the bevel gear 18 and the bevel gear 19, causing the rotating rods 13 on both sides to rotate synchronously, which in turn rotates the actuating block 12, stretching the spring 14, causing the distal end of the actuating block 12 to press against the slider 52, causing the slider 52 to move downwards, and the spring 64 to retract, and the spring 55 to contract. The retraction of the spring 57 causes the push rod 56 to move downwards, pressing its lower end against the slide groove. This causes the movable column 57 to move to the left, and the spring 58 to retract. When the plane at the right end of the movable column 57 separates from the lower surface of the locking block, the spring 55 relaxes, instantly pushing the locking block downwards. This causes the slide rod 53 to move downwards, making the connecting plate 10 move downwards. This causes the movable conductive rod 8 to move downwards rapidly, separating the connecting contact at the upper end of the movable conductive rod 8 from the connecting contact at the lower end of the fixed conductive rod 7, thus completing the power cut-off. At this point, releasing the upper handle 3 causes the spring 14 to retract. Pulling the actuating block 12 reverses and resets it. When manual closing is required, rotate the lower handle 3 to rotate the rotating rod 15, causing the actuating block 17 to rotate. The spring 16 extends, causing the distal end of the actuating block 17 to press against the connecting plate 10. At this time, the connecting plate 10 moves upward, causing the sliding rod 53 to move upward, which in turn moves the locking block upward. The inclined surface 1 of the locking block slides and presses against the inclined surface 2 at the right end of the movable column 57, causing the movable column 57 to move upward. The spring 58 contracts until the locking block moves to the upper side of the inclined surface 2. At this time, the moving conductive rod 8 moves upward. When the moving conductive rod 8 is moved, the connecting contact on the upper side of the moving conductive rod 8 is connected to the conductive contact on the lower side of the fixed conductive rod 7 to complete the closing. When the permanent magnet coil is used for opening, the electromagnetic coil is energized, which generates a magnetic field inside the electromagnetic coil, causing the electromagnetic coil and the moving magnetic core 11 to repel each other, causing the moving magnetic core 11 to move downward and push the slider 52 to move downward, thus completing the opening. When the closing is performed, the direction of the current inside the electromagnetic coil is reversed, which generates an opposite magnetic field inside the electromagnetic coil to attract the moving magnetic core, causing the moving magnetic core 11 to move upward, which in turn causes the slider 53 to move upward, thus completing the closing.

[0026] It is worth noting that the single-chip microcomputer 4 disclosed in the above embodiments is a Siemens S7-200, and the single-chip microcomputer 4 controls the operation of the permanent magnet coil using a method commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manual opening and closing device of a permanent magnet vacuum circuit breaker, comprising a circuit breaker shell (1), the upper surface of the circuit breaker shell (1) is fixedly connected with uniformly distributed vacuum arc extinguishing chambers (2), characterized in that: Also include auxiliary opening mechanism (5); The auxiliary opening mechanism (5) comprises a mounting seat (51), a sliding block (52), a sliding rod (53), a spring three (54) and a spring four (55), the mounting seat (51) is fixedly connected to the left and right sides of the circuit breaker housing (1) respectively, the inner right side of the mounting seat (51) is slidably connected with the sliding block (52), the outer surface of the sliding block (52) is fixedly connected with the spring three (54) between the upper surface of the mounting seat (51), the inner side of the sliding block (52) is slidably connected with the sliding rod (53), the outer surface of the sliding rod (53) is fixedly connected with the clamping block, the upper surface of the clamping block is fixedly connected with the spring four (55) between the lower surface of the sliding block (52).

2. A manual opening and closing device for a permanent-magnet vacuum circuit breaker according to claim 1, characterized in that: The outer side of the circuit breaker housing (1) is provided with a single-chip microcomputer (4), and the input end of the single-chip microcomputer (4) is electrically connected with an external power supply.

3. The manual opening and closing device for permanent magnetic vacuum circuit breaker according to claim 1, characterized in that: The auxiliary opening mechanism (5) further comprises a top rod (56), a movable column (57), a spring five (58) and a limiting pin (59), the top rod (56) is slidably connected to the inner left side of the mounting seat (51), the upper end of the top rod (56) is fixedly connected to the lower surface of the sliding block (52) on the same side, the inner left side of the mounting seat (51) is slidably connected with the movable column (57), the inner side of the movable column (57) is provided with a sliding groove, the lower end of the top rod (56) is slidably connected with the inner wall of the sliding groove on the same side, the left surface of the movable column (57) is fixedly connected with the spring five (58) between the inner wall of the mounting seat (51) on the same side, the right end of the movable column (57) is matched with the clamping block on the same side, the outer surface of the movable column (57) is fixedly connected with the limiting pin (59), the lower surface of the mounting seat (51) is provided with a limiting groove, and the limiting pin (59) is slidably connected in the limiting groove on the same side.

4. The manual opening and closing device for permanent magnetic vacuum circuit breaker according to claim 1, characterized in that: The inner upper and lower surfaces of the vacuum arc-extinguishing chamber (2) are fixedly connected with sealing cover plates (6), the inner side of the upper sealing cover plate (6) is fixedly connected with a fixed electrically conductive rod (7), the inner side of the lower sealing cover plate (6) is slidably connected with a movable electrically conductive rod (8), the lower end of the fixed electrically conductive rod (7) and the upper end of the movable electrically conductive rod (8) are fixedly connected with a connecting contact, the inner side of the vacuum arc-extinguishing chamber (2) is fixedly connected with a shielding cylinder (9), and the lower end of each of the three movable electrically conductive rods (8) is fixedly connected with a connecting plate (10).

5. The manual opening and closing device for permanent magnetic vacuum circuit breaker according to claim 2, characterized in that: The outer surface of the sliding rod (53) is slidably connected with a movable magnetic core (11), the inner upper surfaces of the left and right sides of the circuit breaker housing (1) are fixedly connected with permanent magnet coils, the permanent magnet coils are fixedly connected above the movable magnetic core on the same side, and the input end of the permanent magnet coil is electrically connected with the output end of the single-chip microcomputer (4).

6. The manual opening and closing device for permanent magnetic vacuum circuit breaker according to claim 1, characterized in that: The inside left and right sides of the circuit breaker shell (1) are rotationally connected with rotating rod one (13), the outer surface middle part of rotating rod one (13) is fixedly connected with the knob one (12), the outer surface of knob one (12) and the inside upper surface of the circuit breaker shell (1) are fixedly connected with spring one (14), the outer surface rear side of rotating rod one (13) is fixedly connected with bevel gear one (18), the inside rear surface upper side of the circuit breaker shell (1) is rotationally connected with a transmission shaft, the outer surface left and right sides of the transmission shaft are fixedly connected with bevel gear two (19), bevel gear two (19) are meshingly connected with the same side bevel gear one (18), the front end of rotating rod one (13) is fixedly connected with the handle (3).

7. The manual opening and closing device for permanent magnetic vacuum circuit breaker according to claim 1, characterized in that: The inside lower side of the circuit breaker shell (1) is rotationally connected with rotating rod two (15), the outer surface middle part of rotating rod two (15) is fixedly connected with the knob two (17), the outer surface of knob two (17) and the inside lower surface of the circuit breaker shell (1) are fixedly connected with spring two (16), the front end of rotating rod two (15) is also fixedly connected with the handle (3).

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