Safe and reliable magnetic control outdoor pole-mounted circuit breaker

Abstract

The utility model relates to a safe and reliable magnetic control outdoor pole-mounted circuit breaker, which is provided with a switch-on and switch-off operation mechanism, the switch-on and switch-off operation mechanism adopts a magnetic control mechanism, the magnetic control mechanism comprises a fixed plate, a fixed ring and an inner core block are arranged on one side of the fixed plate, a circle of annular cavity is arranged between the inner core block and the fixed ring, a permanent magnet is arranged in the cavity, and the permanent magnet is arranged in the cavity. A spring cavity is formed in the middle of the inner core block, a spring is arranged in the spring cavity, a movable ring is arranged at the other end of the spring, a spring cavity is formed in the side, facing the spring, of the movable ring, a through hole is formed in the center of the movable ring, an extending shaft is arranged in the through hole, one end of the extending shaft extends outwards, and the other end of the extending shaft is fixedly connected with the spring. A circle of coil sliding cavity is further arranged between the fixed ring and the inner core block, a coil is arranged in the coil sliding cavity, the coil is in sliding connection with the fixed ring and the inner core block, and the coil is fixedly connected with the movable ring; according to the utility model, rapid opening within 10ms is realized, the operation is simpler, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker feeder terminals, in particular to a safe and reliable magnetically controlled outdoor pole-mounted circuit breaker. Background Art

[0002] At present, 10kV outdoor pole-mounted circuit breakers usually use spring operating mechanisms to realize the closing and opening actions of the equipment. According to relevant data analysis, 70% of power switch equipment failures are caused by spring operating mechanisms. This shows that the spring mechanism has deficiencies in reliability and maintenance-free. In addition, the parts processing of the spring operating mechanism is complex, the assembly process is cumbersome, and the closing and opening time is long, which can no longer meet the requirements of the power grid system for maintenance-free, high reliability and intelligence of the equipment; another part uses permanent magnet mechanisms, which have the problem of not being able to open quickly within 10ms in actual use. Summary of the invention

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a safe and reliable magnetically controlled outdoor pole-mounted circuit breaker.

[0004] The specific scheme of the utility model is: a safe and reliable magnetically controlled outdoor pole-mounted circuit breaker is provided with an opening and closing operating mechanism, the opening and closing operating mechanism adopts a magnetic control mechanism, the magnetic control mechanism comprises a fixed plate, a fixed ring and an inner core block are provided on one side of the fixed plate, a circle of annular cavity is provided between the inner core block and the fixed ring, a permanent magnet is installed in the cavity, a spring cavity is provided in the middle of the inner core block, a spring is installed in the spring cavity, a movable ring is installed at the other end of the spring, a spring cavity is provided on the side of the movable ring facing the spring, a through hole is provided in the center of the movable ring, a protruding shaft is installed in the through hole, one end of the protruding shaft protrudes outward, and the other end is fixedly connected to the spring, a circle of coil sliding cavity is also provided between the fixed ring and the inner core block, a coil is installed in the coil sliding cavity, the coil is slidably connected to the fixed ring and the inner core block, and the coil is fixedly connected to the movable ring; when the coil is close to the fixed coil, the spring is in a compressed state.

[0005] Furthermore, the fixed ring and the movable ring are made of magnetic materials, and the fixed ring and the movable ring can be magnetized or demagnetized by energizing the coil.

[0006] Furthermore, the permanent magnet is composed of a plurality of arc-shaped permanent magnets.

[0007] Furthermore, a wear-resistant sleeve is provided on the inner wall of the coil sliding cavity.

[0008] Furthermore, the wear-resistant sleeve is made of porcelain material.

[0009] The utility model has the following beneficial effects: the magnetically controlled outdoor pole-mounted circuit breaker has a compact structure and a more reasonable design, can achieve rapid opening within 10ms by relying on the opening spring inside the mechanism, has a simpler operation method, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the external structure of the outdoor pole-mounted circuit breaker of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the opening and closing operating mechanism of the utility model;

[0012] Figure 3 yes Figure 2 Schematic diagram of the internal structure;

[0013] In the figure: 1. fixed plate; 2. connecting rod; 3. fixed ring; 4. limit baffle; 5. extending shaft; 6. bolt; 7. movable ring; 8. coil; 9. coil sliding cavity; 10. permanent magnet; 11. inner core block; 12. spring; 13. power lead. DETAILED DESCRIPTION

[0014] See also Figure 1-3 The present embodiment is a safe and reliable magnetically controlled outdoor pole-mounted circuit breaker, which is provided with a switch-on and switch-off operating mechanism, wherein the switch-on and switch-off operating mechanism adopts a magnetically controlled mechanism, which comprises a fixed plate 1, a fixed ring 3 and an inner core block 11 are provided on one side of the fixed plate 1, the inner core block 11 is fixedly connected to the fixed plate 1 by bolts 6, a circle of annular cavity is provided between the inner core block 11 and the fixed ring 3 near the left end, a permanent magnet 10 is installed in the cavity, a spring 12 cavity A is provided in the middle of the right end of the inner core block 11, a spring 12 is installed in the spring 12 cavity A, a movable ring 7 is provided at the other end of the spring 12, a spring 12 cavity B is provided on the side of the movable ring 7 facing the spring 12, the spring 12 cavity B is coaxially arranged with the spring 12 cavity A, a through hole is provided in the center of the movable ring 7, a protruding shaft 5 is installed in the through hole, one end of the protruding shaft 5 protrudes outward and is connected to the circuit breaker The moving part of the device, the other end of the extended shaft 5 passes through the through hole and is fixedly connected to the spring 12, the diameter of the spring 12 is larger than the through hole, a circle of coil sliding cavity 9 is also provided between the fixed ring 3 and the inner core block 11, the coil sliding cavity 9 is equipped with a coil 8, the coil 8 is slidably connected to the fixed ring 3 and the inner core block 11, and the coil 8 is fixedly connected to the movable ring 7 by a plurality of bolts 6; the power lead 13 of the coil 8 is led outward from the gap between the fixed ring 3 and the movable ring 7 and connected to a DC power supply, and the spring 12 is in a compressed state when the coil 8 is close to the fixed coil 8; the outer ring of the fixed plate 1 is provided with a plurality of connecting rods 2, and the outer ends of all the connecting rods 2 are commonly connected to a limit baffle 4, the limit baffle 4 is fixedly connected to the connecting rod 2, and the limit baffle 4 is used to limit the maximum displacement of the movable ring 7 moving outward.

[0015] The coil 8 can form a magnet by energizing it. By changing the direction of the current flowing through the coil 8, the magnetic poles at both ends of the coil 8 are changed. Since like poles repel each other and opposite poles attract each other, the coil 8 will move toward or away from the permanent magnet 10. Since the coil 8 is fixedly connected to the movable ring 7, the movable ring 7 will move with the coil 8. When the coil 8 moves toward the permanent magnet 10, the movable ring 7 and the fixed ring 3 approach each other and compress the spring 12 at the same time, and the spring 12 retracts the extended shaft 5; when the coil 8 moves away from the permanent magnet 10, the spring 12 stretches due to its own elastic force, thereby extending the extended shaft 5 outward.

[0016] Furthermore, the fixed ring 3 and the movable ring 7 are made of magnetic materials, and the coil 8 is energized to excite or demagnetize the fixed ring 3 and the movable ring 7; after excitation, the fixed ring 3 and the movable ring 7 also become permanent magnets 10, and lose their magnetism after demagnetization. Therefore, when closing the switch, the coil 8 is injected with a positive current for excitation, and the movable ring 7 and the fixed ring 3 are attracted to each other. At this time, even if the coil 8 loses power, the movable ring 7 and the fixed ring 3 will remain in the attracted position due to the magnetic attraction. When opening the switch, it is only necessary to inject a small reverse current into the coil 8 to demagnetize the movable ring 7 and the fixed ring 3. At the same time, the coil 8 and the permanent magnet 10 repel each other with the same polarity. At this time, the fast opening of the switch is achieved under the elastic force of the spring 12, and the fast opening of the switch can be achieved within 10ms. Furthermore, the permanent magnet 10 is composed of a plurality of arc-shaped permanent magnets 10.

[0017] Furthermore, a wear-resistant sleeve is provided on the inner wall of the coil sliding cavity 9.

[0018] Furthermore, the wear-resistant sleeve is made of porcelain material. By providing the porcelain wear-resistant sleeve, the coil 8 is prevented from being worn due to friction in the sliding cavity, thereby increasing its service life.

Claims

1. A safe and reliable magnetically controlled outdoor pole-mounted circuit breaker, provided with a switch-on and switch-off operating mechanism, characterized in that: The opening and closing operating mechanism adopts a magnetic control mechanism, which includes a fixed plate, a fixed ring and an inner core block are provided on one side of the fixed plate, a ring-shaped cavity is provided between the inner core block and the fixed ring, a permanent magnet is installed in the cavity, a spring cavity is provided in the middle of the inner core block, a spring is installed in the spring cavity, a movable ring is provided at the other end of the spring, a spring cavity is provided on the side of the movable ring facing the spring, a through hole is provided in the center of the movable ring, an extension shaft is installed in the through hole, one end of the extension shaft extends outward, and the other end is fixedly connected to the spring, a coil sliding cavity is also provided between the fixed ring and the inner core block, a coil is installed in the coil sliding cavity, the coil is slidably connected to the fixed ring and the inner core block, and the coil is fixedly connected to the movable ring; when the coil is close to the fixed coil, the spring is in a compressed state.

2. A safe and reliable magnetically controlled outdoor pole-mounted circuit breaker according to claim 1, characterized in that: The fixed ring and the movable ring are made of magnetic materials, and the fixed ring and the movable ring can be excited or demagnetized by energizing the coil.

3. A safe and reliable magnetically controlled outdoor pole-mounted circuit breaker according to claim 1, characterized in that: The permanent magnet is composed of a plurality of arc-shaped permanent magnets.

4. A safe and reliable magnetically controlled outdoor pole-mounted circuit breaker according to claim 1, characterized in that: The inner wall of the coil sliding cavity is provided with a wear-resistant sleeve.

5. A safe and reliable magnetically controlled outdoor pole-mounted circuit breaker according to claim 4, characterized in that: The wear-resistant sleeve is made of porcelain material.

Images