An electromagnetic-operated outdoor pole-mounted circuit breaker

Abstract

The utility model provides an electromagnetic operation outdoor pole circuit breaker, relate to circuit breaker technical field, is equipped with arc extinguishing unit and pull rod in pole, and the first end of pull rod is connected with arc extinguishing unit, electromagnetic operation mechanism, the cover is provided with through -hole, operating link is along the axial penetration through -hole, and the first end of operating link is connected with the second end of pull rod, spring guide cover is equipped on operating link, and the outside wall of spring guide cover is slidably connected with the lateral wall of through -hole, and the outside of operating link is coaxially equipped with closing coil and opening coil. The electronic PT, CT and vacuum arc chamber are fixed as an integral structure. Through electromagnetic operation mechanism and three -phase connecting rod, three -phase integrated direct -acting type connection is realized, and synchronization is ensured; and through digital ADMU control module, digital conversion is completed, and each parameter of outdoor pole circuit breaker is digitized, compact structure and reduce installation difficulty, the time of opening and closing is shortened, and the sensitivity is higher, and the electricity can be cut off quickly in the emergency failure, so as to adapt to the high performance requirement of new power system.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an electromagnetically operated outdoor pole-mounted circuit breaker. Background Technology

[0002] Outdoor pole-mounted circuit breakers, as key switching equipment in power distribution networks, are widely used in outdoor power distribution systems in rural and urban power grids. They mainly undertake the functions of switching on and off load current, overload current, and short-circuit current. Their core function is to close, carry, and interrupt current under normal circuit conditions, and to close, carry, and disconnect current in fault circuits (including short circuits) within a specified time. They are important node equipment to ensure the safe and stable operation of the power grid.

[0003] Currently, existing outdoor pole-mounted circuit breaker technologies have the following significant limitations:

[0004] Existing outdoor pole-mounted circuit breakers mostly employ spring-operated mechanisms, whose opening and closing actions rely on the coordinated operation of energy-storage springs, four-bar linkages, and cam mechanisms: the driving force is provided by energy storage in the springs, and the force is transmitted and its direction is changed through the four-bar linkage and cam, ultimately completing the opening and closing of the contacts and maintaining their state. However, such mechanical structures suffer from multiple force transmission losses, resulting in generally low transmission efficiency; moreover, due to the gaps, friction, and elastic deformation between multiple components, the synchronicity and response speed of the opening and closing actions are limited, making it difficult to meet the requirements of new power systems for "rapid three-phase simultaneous fault disconnection"; when a short circuit or other fault occurs in the power grid, if the circuit breaker cannot achieve synchronous three-phase contact disconnection within milliseconds, it may lead to an expansion of the fault range and threaten the overall safety of the power grid.

[0005] Therefore, there is an urgent need to develop a circuit breaker that is compact in structure, reduces installation difficulty, shortens opening and closing time, and has higher sensitivity, so as to quickly cut off power in case of emergency faults and meet the high-performance requirements of the new power system for power distribution equipment. Utility Model Content

[0006] The purpose of this invention is to provide an electromagnetically operated outdoor pole-mounted circuit breaker to solve the problems existing in the prior art. It has a compact structure, reduces installation difficulty, shortens opening and closing time, and has higher sensitivity.

[0007] To achieve the above objectives, this utility model provides the following solution: An electromagnetically operated outdoor pole-mounted circuit breaker, comprising: a pole post, wherein an arc-extinguishing unit and a pull rod are provided in the pole post, and the first end of the pull rod is connected to the arc-extinguishing unit; an electromagnetic operating mechanism, comprising: a cover body, wherein a through hole is provided in the cover body; an operating linkage, wherein the operating linkage passes through the through hole axially, and the first end of the operating linkage is connected to the second end of the pull rod; a spring guide sleeve, wherein the spring guide sleeve is sleeved on the operating linkage, and the outer side wall of the spring guide sleeve slides in cooperation with the side wall of the through hole; a closing coil; and a opening coil, wherein the closing coil and the opening coil are both coaxially sleeved on the outside of the operating linkage.

[0008] In one embodiment, the number of poles is three, and the three poles are arranged side by side at equal intervals on the mounting plane of the housing, and any one of the poles is fixedly connected to the housing.

[0009] In one embodiment, the operating link is coaxially arranged with the pull rod of the pole post in the middle position. The first end of the operating link is provided with a three-link connecting rod. The middle part of the three-link connecting rod is fixedly connected to the pull rod of the pole post in the middle, and the two ends of the three-link connecting rod are respectively connected to the pull rods of the pole posts on both sides.

[0010] As one embodiment, the pole is further provided with an inlet socket, an electronic PT, an electronic CT, and an outlet socket. The inlet socket is fixed to the outer top of the pole, the electronic PT is fixed to the side wall of the pole, the electronic CT is arranged in a ring around the outside of the outlet socket, one end of the outlet socket is located inside the pole, and the other end extends to the outside of the pole.

[0011] As one embodiment, the second end of the operating linkage is provided with a limiting plate, the axis of the limiting plate is collinear with the axis of the operating linkage, and the cover is provided with a limiting end face for abutting against the limiting plate on the side facing the limiting plate.

[0012] As one embodiment, a magnetic sleeve is connected to the cover, and the magnetic sleeve is in contact with the inner end face of the cover; a side cover is connected to the side of the cover, and the side cover is flush with the inner end face of the cover; the spring guide sleeve includes an outer eave for abutting against the magnetic sleeve, and a permanent magnet for attracting the outer eave is provided in the magnetic sleeve.

[0013] In one embodiment, there are two covers, namely a top cover and a bottom cover, which are arranged opposite to each other; there are two magnetic sleeves, namely a top magnetic sleeve connected to the top cover and a bottom magnetic sleeve connected to the bottom cover; there are two side covers, namely a top side cover connected to the top cover and a bottom side cover connected to the bottom cover.

[0014] In one embodiment, the first end of the operating link is provided with an internal threaded hole, and the second end of the pull rod is machined with an external thread that matches the internal threaded hole. The operating link is threadedly connected to the second end of the pull rod through the internal threaded hole.

[0015] In one embodiment, the operating linkage has a disc-shaped structure, and there are two spring guide sleeves, namely a top spring guide sleeve and a bottom spring guide sleeve; the top spring guide sleeve and the bottom spring guide sleeve are respectively provided with a top outer eave and a bottom outer eave, and the top outer eave and the bottom outer eave are both in contact with the disc-shaped structure; the top outer eave and the bottom outer eave are each provided with a disc spring and a spring guide rod, and the top outer eave and the bottom outer eave are each provided with a guide hole for the spring guide rod to be inserted.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] 1. This electromagnetic operating mechanism adopts direct electromagnetic drive, directly generating axial electromagnetic force through the closing and opening coils to drive the operating linkage. This eliminates intermediate transmission components such as energy storage springs, four-bar linkages, and cams, reducing transmission links and improving energy conversion efficiency. The mechanism features a coaxial integrated design, resulting in a more compact overall structure. Compared to comparable spring mechanisms, it is smaller and lighter, significantly reducing the overall size of the circuit breaker and installation difficulty. Furthermore, this electromagnetic operating mechanism is directly driven by electromagnetic force, eliminating the need for energy storage, effectively shortening opening and closing times, and increasing sensitivity. In case of emergency faults such as short circuits, it can quickly disconnect the circuit, reducing the duration of the fault.

[0018] Other technical solutions of this utility model have also achieved the following technical effects:

[0019] 2. The electrode post adopts an integrated primary and secondary sensing structure. Through APG sealing technology, the primary arc-extinguishing unit (vacuum arc-extinguishing chamber) and secondary sensing elements (electronic PT, electronic CT) are integrated into the same column housing, forming a compact whole. Compared with traditional external electromagnetic PT and CT, the electronic PT / CT does not require a core structure, reducing its size. Furthermore, through the sealing process, it is integrated with the electrode post body, eliminating the need for additional installation space.

[0020] The integrated design significantly reduces the overall size of the poles, and the total space occupied is reduced when the three poles are arranged side by side with equal spacing. In addition, the integrated structure reduces external cable connections, reduces the risk of outdoor environment corrosion to the device, and reduces the maintenance frequency.

[0021] 3. The three-phase linkage of this application achieves precise synchronization through "rigid transmission and symmetrical layout": a rectangular rigid three-link connecting rod adapted to the total spacing of the three-phase poles is adopted, the center of which is rigidly connected to the operating link of the electromagnetic operating mechanism. The three mounting positions are evenly distributed along the rod and fixed one by one with the insulating pull rods of the three-phase poles. When the operating mechanism outputs power, the three-link connecting rod transmits the driving force evenly to the three pull rods along the rigid rod. Combined with the symmetrical arrangement of the poles (the middle pole is collinear with the center line of the housing, and the two poles are parallel and symmetrical) and the coaxial design of the operating link and the middle pull rod, the opening and closing actions are highly synchronized, which significantly improves the consistency and reliability of the three-phase circuit disconnection under fault conditions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a half-section front view of the overall structure of this utility model;

[0024] Figure 2 This is a side view of the overall structure of this utility model.

[0025] Figure 3 This is a schematic diagram of the assembly of the three connecting rods of this utility model;

[0026] Figure 4 This is a schematic diagram of the electromagnetic operating mechanism in the open state of this utility model;

[0027] Figure 5 This is a schematic diagram of the electromagnetic operating mechanism of this utility model in the closed state;

[0028] Figure 6 This is a schematic diagram illustrating the control principle of an electromagnetically operated digital outdoor pole-mounted circuit breaker.

[0029] The components include: 1. Pole post; 2. Pull rod; 3. Vacuum interrupter; 4. Column housing; 5. Electromagnetic operating mechanism; 6. Housing; 7. Three-way connecting rod; 8. Inlet socket; 9. Electronic PT; 10. Electronic CT; 11. Outlet socket; 12. Closing indicator light; 13. Opening indicator light; 14. Junction box; 15. Digital module; 16. Fixed bracket; 17. Aviation connector;

[0030] 501. Operating linkage; 502. Spring guide sleeve; 5021. Top spring guide sleeve; 5022. Bottom spring guide sleeve; 503. Cover; 5031. Top cover; 5032. Bottom cover; 504. Magnet sleeve; 5041. Top magnet sleeve; 5042. Bottom magnet sleeve; 505. Permanent magnet; 506. Side cover; 5061. Top side cover; 5062. Bottom side cover; 507. Wire 508. Opening coil; 509. Support rod; 510. Closing coil; 511. External thread of the connecting rod; 512. Internal threaded hole; 513. Spring guide rod; 514. Disc spring; 515. L-shaped bracket; 516. Nut assembly; 517. Terminal block; 518. Limiting plate; 519. Outer eaves; 5191. Top outer eaves; 5192. Bottom outer eaves; 520. Disc-shaped structure. Detailed Implementation

[0031] 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.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment provides an electromagnetically operated outdoor pole-mounted circuit breaker, such as... Figure 1-6 As shown, the device includes a pole post 1, which houses an arc-extinguishing unit and a pull rod 2. Preferably, the pole post 1 is a sealed pole post. The pole post 1 includes a shell 4, which is a hollow cylindrical structure. The shell 4 and the pull rod 2 are coaxially arranged, and the pull rod 2 is an insulated pull rod. The central axis of the shell 4 coincides with the axis of the insulated pull rod 2. Both the arc-extinguishing unit and the pull rod 2 are housed within the shell 4. The arc-extinguishing unit includes a vacuum interrupter chamber 3. The moving contact of the vacuum interrupter chamber 3 extends downwards, and the first end of the pull rod 2 is connected to the moving contact of the arc-extinguishing unit. Preferably, the moving contact and the first end of the pull rod 2 are fixed by a pin connection. The stationary contact of the vacuum interrupter chamber 3 extends upwards and is connected to the inlet seat 8 at the top of the pole post 1.

[0034] The electromagnetic operating mechanism 5 is an independently assembled module, including a cover 503, an operating link 501, a spring guide sleeve 502, a closing coil 510, and a closing coil 508. The cover 503 has a through hole, and the inner wall of the through hole is machined with an axial guide surface. Preferably, the cover 503 is an annular structure, with the through hole located at the center of the annular cover 503. The operating link 501 is preferably a metal rod-shaped structure, and it passes axially through the through hole of the cover 503. The first end of the operating link 501 is fixedly connected to the second end of the pull rod 2. Preferably, the first end of the operating link 501 has an external thread on its outer circumference, and it is fixedly connected to the second end of the insulating pull rod 2 (which has an internal thread) via a threaded connection. The spring guide sleeve 502 is a cylindrical structure, fitted onto the outer wall of the operating link 501, and the outer wall of the spring guide sleeve 502 slides against the inner wall (axial guide surface) of the through hole. Both the closing coil 510 and the opening coil 508 are toroidal windings, and the central axis of the two coils coincides with the axis of the operating link 501. Both the closing coil 510 and the opening coil 508 are coaxially sleeved on the outside of the operating link 501.

[0035] Working principle:

[0036] S1. Closing operation process:

[0037] When the circuit breaker receives a closing command, the closing coil 510 is energized, and the annular winding generates an upward electromagnetic force. This electromagnetic force acts on the operating link 501. Since the coil and the operating link 501 are arranged coaxially, the force is transmitted axially. Driven by the electromagnetic force, the operating link 501 moves upward axially, and its first end drives the insulated pull rod 2 to move upward synchronously through a threaded connection. At the same time, the spring guide sleeve 502, which is sleeved on the outside of the operating link 501, slides against the axial guide surface of the through hole of the cover 503, ensuring that the operating link 501 and the pull rod 2 move stably along the axial direction and that there is no radial offset between the operating link 501 and the pull rod 2.

[0038] When the insulating rod 2 moves upward, it drives the moving contact of the vacuum interrupter 3 to move upward, eventually making contact with the stationary contact and thus completing the circuit.

[0039] S2, tripping operation process:

[0040] When the circuit breaker receives a tripping command, the closing coil 510 is de-energized, and the tripping coil 508 is energized. The annular winding generates an axially downward electromagnetic force, which acts on the operating linkage 501 along the axial direction. Driven by the reverse electromagnetic force, the operating linkage 501 moves axially downward, causing the pull rod 2 to move downward synchronously; the spring guide sleeve 502 slides again along the axial guide surface of the through hole in the cover 503 to ensure stable movement direction.

[0041] When the insulating rod 2 moves downward, it drives the moving contact of the vacuum interrupter 3 to move downward and separate from the stationary contact. A vacuum break is formed inside the vacuum interrupter 3, which quickly extinguishes the arc and breaks the circuit.

[0042] After the tripping action is completed, the tripping coil 508 is de-energized. The separation state of the moving contact and the stationary contact can be locked by the position of the insulating pull rod 2 and the operating linkage 501 through the limiting cooperation between the spring guide sleeve 502 and the cover 503, so as to stably maintain the tripping state.

[0043] This invention generates axial electromagnetic force by alternately energizing the closing / opening coils, and achieves power transmission through the rigid connection between the operating link 501 and the insulating pull rod 2. The sliding guide of the spring guide sleeve 502 and the cover 503 ensures the stability of the movement, and finally the circuit is turned on and off by the opening and closing of the contacts of the vacuum interrupter 3.

[0044] In one embodiment, the pole post 1 is fixed to the upper part of the housing 6, and three pole posts 1 are provided, which are fused pole posts. The three pole posts 1 are arranged side by side at equal intervals. Preferably, the column shell 4 of the pole post 1 is fixedly connected to the housing 6. Preferably, the bottom of the column shell 4 of each pole post 1 is provided with an annular flange, and multiple bolt holes are evenly distributed along the circumference of the flange. The pole post 1 is fixed to the mounting plane on the upper part of the housing 6 by high-strength bolts, and the axis of the pole post 1 is parallel or collinear with the vertical center line of the housing 6. Preferably, the axis of the middle pole post 1 is collinear with the vertical center line of the housing 6, and the axes of the remaining pole posts 1 are parallel to the vertical center line of the housing 6, ensuring the symmetrical distribution of the pole post group. The electromagnetic operating mechanism 5 is located in the middle of the housing 6. The central axis of the electromagnetic operating mechanism 5 is in the same vertical plane as the axis of the middle pole post 1, that is, the operating linkage 501 of the electromagnetic operating mechanism 5 is coaxially arranged with the pull rod 2 of the middle pole post 1.

[0045] The first end of the operating link 501 of the electromagnetic operating mechanism 5 is connected to a three-link connecting rod 7. The operating link 501 is connected to the middle of the three-link connecting rod 7. The three-link connecting rod 7 has three mounting positions corresponding to the three pole posts 1. The three mounting positions are evenly arranged along the length of the three-link connecting rod 7 and correspond one-to-one with the pole posts 1. The three-link connecting rod 7 is a rectangular rigid metal rod, and the length of the three-link connecting rod 7 is adapted to the total spacing of the three pole posts 1. The mounting positions at both ends of the three-link connecting rod 7 are connected to the insulating pull rods 2 of the two side pole posts 1, respectively. The mounting position in the middle of the three-link connecting rod 7 is fixedly connected to the insulating pull rod 2 of the middle fused pole post 1, preferably by bolts. Through this connection, the power of the electromagnetic operating mechanism 5 can be synchronously transmitted to the insulating pull rods 2 of the three pole posts 1 to achieve three-phase synchronous opening and closing.

[0046] When the electromagnetic operating mechanism 5 receives a tripping or closing command, its internal coil is energized to generate an axial driving force, which drives the operating link 501 to move linearly along its own axis. Since the operating link 501 is coaxially arranged with the insulating pull rod 2 of the intermediate fusion pole 1, and the first end of the operating link 501 is rigidly connected to the middle of the three-link 7, the driving force can be effectively transmitted to the three-link 7, so that the three-link 7 moves axially synchronously with the operating link 501.

[0047] The three-link rod 7 is a rectangular rigid metal rod with three mounting positions evenly arranged along its length, corresponding one-to-one with the insulating pull rods 2 of the three fused pole posts 1. When the three-link rod 7 moves under the drive of the operating link 501, the middle mounting position is rigidly fixed to the pull rod 2 of the middle pole post 1 by bolts, which can directly transmit power to the middle pull rod 2, ensuring the movement accuracy of the middle pole post 1; the mounting positions at both ends are connected to the pull rods 2 of the two side pole posts 1, and with the help of the rigid structure of the three-link rod 7, the pull rods 2 on both sides receive power synchronously.

[0048] Driven by the three connecting rods 7, the pull rods 2 of the three poles 1 move synchronously along their respective axes. When closing, the pull rod 2 moves upward, driving the moving contact of the arc-extinguishing unit inside the pole 1 to approach and contact the stationary contact, thus realizing the synchronous conduction of the three-phase circuit. When opening, the pull rod 2 moves downward, causing the moving contact to separate from the stationary contact, and the arc-extinguishing unit quickly extinguishes the arc, thus realizing the synchronous disconnection of the three-phase circuit.

[0049] In one embodiment, the pole post 1 is an integrated primary and secondary structure, and the pole post 1 includes an inlet socket 8, a vacuum interrupter 3, an electronic PT9, an insulating pull rod 2, an electronic CT10, and an outlet socket 11.

[0050] Inlet connector 8: Inlet connector 8 is fixed to the outer top of pole post 1, preferably by bolt fixing. Inlet connector 8 can be electrically connected to the stationary end conductive rod of vacuum interrupter 3.

[0051] Vacuum interrupter 3: Vacuum interrupter 3 is arranged in the upper part of pole post 1. Vacuum interrupter 3 is preferably cylindrical. The stationary contact of vacuum interrupter 3 can be connected to inlet seat 8, and the moving contact extends downward. The moving contact is connected to the internal end of outlet seat 11 through a cable.

[0052] Electronic PT9 (voltage transformer): The electronic PT9 is located at one end of the upper side of pole 1.

[0053] Pull rod 2: Pull rod 2 is an insulating rod, which can be made of glass fiber resin. Pull rod 2 is arranged in the lower part of the fusion pole 1. The upper end of pull rod 2 is connected to the moving contact rod of vacuum interrupter 3 by thread.

[0054] Electronic CT10 (current transformer): This is a toroidal core winding structure. The electronic CT10 is wound in a ring and positioned on the upper side of the pole post 1 via a terminal block 11. The electronic CT10 is opposite to the electronic PT9, and the conductive rod of the electronic CT10 is in contact with the terminal block 11. One end of the terminal block 11 is inside the pole post 1 and can be electrically connected to the vacuum interrupter 3. The other end of the terminal block 11 is exposed outside the pole post 1.

[0055] In this embodiment, the vacuum interrupter 3, electronic PT9, insulating pull rod 2, electronic CT10 and outlet socket 11 of the pole post 1 are formed into an integrated structure by APG (automatic pressure gel) sealing process. The end of the inlet socket 8 sealed inside is connected to the upper part of the vacuum interrupter 3, and the end of the outlet socket 11 sealed inside is connected between the lower part of the vacuum interrupter 3 and the upper part of the insulating pull rod 2.

[0056] Primary circuit: Current flows in from the inlet socket 8, passes through the stationary contact of the vacuum interrupter 3 → moving contact → flexible conductive strip → outlet socket 11, forming the main circuit path. The vacuum interrupter 3 is responsible for extinguishing the arc during opening and closing.

[0057] Secondary sensing: Electronic PT9 is connected in parallel between the incoming terminal 8 and the grounding terminal to collect the incoming voltage signal; Electronic CT10 has a ring structure and surrounds the conductive rod of the outgoing terminal 11. It can collect the main circuit current signal through electromagnetic induction coupling; The secondary signals of both are transmitted to the external control unit through shielded cables to realize the real-time acquisition of current and voltage physical quantities.

[0058] The pole 1 integrates the primary vacuum interrupter 3 and the secondary electronic PT9 and CT10 structures, achieving a physical fusion of primary and secondary components. The integrated pole 1 enables the acquisition of three-phase current and voltage signals flowing through the circuit breaker.

[0059] In one embodiment, the second end of the operating link 501 (the end furthest from the three-link 7) is provided with a limiting plate 518 for limiting its axial displacement. The limiting plate 518 can be integrally formed with the operating link 501, and the axis of the limiting plate 518 is collinear with the axis of the operating link 501, forming a T-shaped rigid structure. The limiting plate 518 is preferably hexagonal. The end of the electromagnetic operating mechanism 5 is provided with a circular cover 503, and a limiting end face is machined on the side of the cover 503 facing the limiting plate 518. When the circuit breaker performs the closing action, the operating link 501 drives the limiting plate 518 to move towards the cover 503. Finally, the hexagonal end face of the limiting plate 518 fits and abuts against the limiting end face of the cover 503. At this time, the displacement of the operating link 501 reaches the end of the closing stroke. The rigid contact limits the continued axial movement of the operating link 501, which not only achieves precise limiting of the closing position, but also avoids local stress concentration through the symmetrical contact of the hexagonal structure. The lower end of the operating linkage 501 is arranged in the following order, with the top facing upwards: cover 503, side cover 506, magnet sleeve 504, coil housing 507, trip coil 508, spring guide sleeve 502, support linkage 509, closing coil 510, magnet sleeve 504, side cover 506, cover 503, and nut assembly 516. All components are fixedly connected by bolts. The cover 503, magnet sleeve 504, permanent magnet 505, side cover 506, coil housing 507, trip coil 508, and closing coil 510 are symmetrically arranged vertically via the support linkage 509; specifically, the support linkage 509 can be fixedly connected to the trip coil 508 and the closing coil 510.

[0060] In one embodiment, the electromagnetic operating mechanism 5 has two covers 503: a top cover 5031 at the top and a bottom cover 5032 at the bottom. The top cover 5031 and the bottom cover 5032 are arranged opposite each other and axially aligned. The top cover 5031 and the bottom cover 5032 have a disc-shaped structure, are arranged opposite each other, and are axially aligned by four circumferentially evenly distributed positioning pins to ensure the symmetry of the overall structure. The covers 503 are preferably made of non-magnetic metal.

[0061] A magnetic sleeve 504 is connected to the cover 503. The magnetic sleeve 504 is made of magnetically conductive metal and has a ring structure. The magnetic sleeve 504 fits against the inner end face of the cover 503. A hole is provided in the magnetic sleeve 504 and a permanent magnet 505 is arranged in the hole.

[0062] Preferably, there are two magnet sleeves 504, namely a top magnet sleeve 5041 connected to the top cover 5031 and a bottom magnet sleeve 5042 connected to the bottom cover 5032. The top magnet sleeve 5041 and the bottom magnet sleeve 5042 are arranged opposite to each other, and the cover 503 and the corresponding magnet sleeve 504 are fixedly connected by bolts.

[0063] A side cover 506 is connected to the side of the cover 503. The side cover 506 is preferably made of non-magnetic metal. The cover 503 and the side cover 506 together cover the electromagnetic operating mechanism 5. Preferably, the side cover 506 includes a top side cover 5061 connected to the top cover 5031 and a bottom side cover 5062 connected to the bottom cover 5032. After the side cover 506 is assembled with the corresponding cover 503, the inner end faces of the side cover 506 and the cover 503 are flush. Preferably, the support rod 509 can pass through the opening coil 508 and the closing coil 510. While the opening coil 508 and the closing coil 510 are fixedly connected to the support rod 509, the two ends of the support rod 509 are respectively fixedly connected to the top side cover 5061 and the bottom side cover 5062. The connection method can be bolt connection or welding, thereby supporting the overall structure.

[0064] The operating link 501 simultaneously slides and abuts against the sidewalls of the through holes in the top cover 5031 and the bottom cover 5032, with a clearance of 0.1mm. This ensures smooth movement of the operating link 501 and provides good guidance, guaranteeing its axial movement accuracy. The operating link 501 is made of magnetically conductive metal.

[0065] The spring guide sleeve 502 is provided with an outer eave 519. When the circuit breaker is open, the operating linkage 501 drives the spring guide sleeve 502 to move downward, and finally the lower end face of the outer eave 519 is in contact with the upper end face of the bottom magnetic sleeve 5042. Due to the presence of the permanent magnet 505 in the bottom magnetic sleeve 5042, the two generate sufficient magnetic attraction to keep the circuit breaker in the open state. When the circuit breaker is closed, the operating linkage 501 drives the spring guide sleeve 502 to move upward, and finally the upper end face of the outer eave 519 is in contact with the lower end face of the top magnetic sleeve 5041. The permanent magnet 505 in the top magnetic sleeve 5041 generates sufficient magnetic attraction to overcome the reaction force of the closing spring and keep the circuit breaker in the closed state. Through this structural design, the symmetrically distributed cover 503, magnet sleeve 504 and permanent magnet 505, combined with the sealing function of the side cover 506, and the precise cooperation between the operating linkage 501 and the cover 503, ensure the stability of the electromagnetic operating mechanism 5 in the opening and closing states, while guaranteeing the reliability of the overall structure and the accuracy of the movement.

[0066] In one embodiment, the first end (top) of the operating link 501 is provided with an external thread 511 and an internal threaded hole 512. The second end of the pull rod 2 protrudes from the cylindrical shell 4 and extends into the internal threaded hole 512. The second end of the pull rod 2 is machined with an external thread that matches the internal threaded hole 512. The operating link 501 is threadedly connected to the second end of the pull rod 2 through the internal threaded hole 512. The operating link 501 is vertically arranged along the central axis of the electromagnetic operating mechanism 5, and the axis of the operating link 501 is collinear with the through-hole axes of the top cover 5031 and the bottom cover 5032. The axis of the insulated pull rod 2 coincides with the axis of the operating link 501 to ensure that there is no additional bending moment during power transmission.

[0067] In one embodiment, the trip coil 508 has an overall annular cylindrical structure. The trip coil 508 is in contact with the top end faces of the bottom magnet sheath 5042 and the bottom side cover 5062 (the top end faces of both are flush), and can be fixedly connected by bolts. The trip coil 508 and the operating linkage 501 are spaced apart, with the gap extending radially. An annular eaves receiving space is formed between the trip coil 508 and the operating linkage 501. When the outer eaves 519 is in contact with the bottom magnet sheath 5042, the outer eaves 519 can be embedded in the eaves receiving space, and the outer eaves 519 can be close to the side wall of the trip coil 508. The outer eaves 519 is completely embedded in the eaves receiving space. The close fit between the outer eaves 519 and the coil enhances the magnetic circuit closure.

[0068] The closing coil 510 and the opening coil 508 are symmetrical mirror structures. The closing coil 510 has an overall annular cylindrical structure. The closing coil 510 is in contact with the bottom end faces of the top magnet sheath 5041 and the top side cover 5061 (both bottom end faces are flush). A gap is provided between the closing coil 510 and the operating linkage 501. An eaves accommodating space is also provided between the closing coil 510 and the operating linkage 501. When closing, the outer eaves 519 is in contact with the top magnet sheath 5041, and the outer eaves 519 can be embedded in the eaves accommodating space. At this time, the outer eaves 519 can be close to the closing coil 510. The outer eaves 519 is completely embedded in the eaves accommodating space to ensure that the magnetic circuit passes through the mating area between the outer eaves 519 and the coil.

[0069] In this embodiment, the opening coil 508 and the closing coil 510 are arranged in the coil housing 507, and each has a terminal 517 leading out. The coil housing 507 is made of insulating non-metallic material.

[0070] In one embodiment, the spring guide sleeve 502 is provided with at least a spring guide rod 513 and a disc spring 514 in the circumferential direction. Preferably, there are three sets of spring guide rods 513 and disc springs 514. The function of providing spring guide rods 513 and disc springs 514 is to ensure the compliance of mechanical moving parts and the adjustment of the circuit breaker opening and closing speed during the opening and closing process. Specifically, the operating linkage 501 has a centrally located disc-shaped structure 520. Preferably, the disc-shaped structure 520 is integrally formed with the operating linkage 501. There are two spring guide sleeves 502: a top spring guide sleeve 5021 and a bottom spring guide sleeve 5022. The top spring guide sleeve 5021 and the bottom spring guide sleeve 5022 are symmetrically arranged above and below the disc-shaped structure 520. Similarly, there are two outer eaves 519: a top outer eave 5191 on the top spring guide sleeve 5021 and a bottom outer eave 5192 on the bottom spring guide sleeve 5022. The bottom surface of the top outer eave 5191 is fitted and fixed to the top surface of the disc-shaped structure 520, and the top surface of the bottom outer eave 5192 is fitted and fixed to the bottom surface of the disc-shaped structure 520, ensuring that the upper and lower outer eaves form a rigid whole with the disc-shaped structure 520 and move axially synchronously with the operating linkage 501. Disc springs 514 are provided on both the top outer edge 5191 and the bottom outer edge 5192. The two disc springs 514 are staggered to avoid interference. Guide holes are provided on both the top outer edge 5191 and the bottom outer edge 5192 to allow the spring guide rod 513 that mates with the disc spring 514 to be inserted into the guide holes, ensuring the stability of the movement.

[0071] In this embodiment, three guide holes are provided on both the top outer eaves 5191 and the bottom outer eaves 5192. The guide holes are clearance-fitted with the spring guide rod 513. One end of the spring guide rod 513 is vertically welded to the periphery of the guide hole of the outer eaves 519. The other end of the spring guide rod 513 passes through the positioning hole of the disc spring 514 and the disc-shaped structure 520 and extends into the guide hole of the opposite outer eaves 519, forming a sliding fit with the guide hole of the top outer eaves 5191 on the opposite side.

[0072] The upper and lower disc springs 514 can be arranged in a 120° staggered manner to avoid edge interference between adjacent disc springs 514 during compression. During the entire opening and closing process, the parallelism error between the axis of the spring guide rod 513 and the axis of the operating link 501 is small, which can effectively constrain the radial sway of the spring guide sleeve 502. Combined with the fit and guidance of the outer edge and the magnet sheath, it ensures the compliance of the motion trajectory of the mechanical moving parts.

[0073] Through the above structural design, by utilizing the symmetrically arranged spring guide sleeves, the staggered disc springs 514, and the rigidly connected outer eaves-disc structure, the adjustable speed of opening and closing is achieved, and the motion stability is ensured through multiple guiding constraints, which significantly improves the mechanical life of the electromagnetic operating mechanism 5.

[0074] In one embodiment, L-shaped brackets 515 are connected to both sides of the bottom cover 5062, and a fixed bracket 16 is fixedly installed on the inner side wall of the housing 6. The L-shaped brackets 515 are fixedly connected to the fixed brackets 16, thereby supporting and fixing the entire electromagnetic operating mechanism 5 through the housing 6.

[0075] In one embodiment, the operating link 501, spring guide sleeve 502, and magnet sleeve 504 in the electromagnetic operating mechanism 5 are all made of magnetically conductive metal; while the cover 503, side cover 506, support link 509, spring guide rod 513, disc spring 514, and nut assembly 516 are all made of non-magnetically conductive metal; and the coil housing 507 is made of insulating non-metallic material. This ensures smooth opening and closing of the circuit breaker without being affected by other surrounding electromagnetic fields.

[0076] In one embodiment, the three-link connecting rod 7 is a rigid cuboid structure with three connection holes at the top. The electromagnetic operating mechanism 5 is connected to the lower external threaded rod of the insulating pull rod 2 of the middle fusion pole 1 through its top internal threaded hole 512. The middle part of the three-link connecting rod 7 is fixed between the electromagnetic operating mechanism 5 and the lower external threaded rod of the pull rod 2, and the two ends of the three-link connecting rod 7 are connected to the lower external threaded rods of the insulating pull rods 2 of the other two fusion poles 1 and fixed with nuts. One set of electromagnetic operating mechanism 5 can simultaneously drive the insulating pull rods 2 of the three-phase fusion poles 1 through the three-link connecting rod 7, effectively eliminating the cumulative error of three-phase operation and significantly improving the three-phase synchronization of the circuit breaker.

[0077] When the circuit breaker needs to be opened, the opening coil 508 is energized by the control circuit. The coil generates an attractive force through electromagnetic induction, causing the operating link 501, spring guide sleeve 502, spring guide rod 513, disc spring 514 and nut assembly 516 to pull the pull rod 2 downward from the original closed position. During the movement, the lower spring guide rod 513 of the operating link 501 first contacts the magnet sleeve 504 and compresses the internal disc spring 514. Finally, the lower end face of the bottom outer edge 5192 is attached to the upper end face of the bottom magnet sleeve 5042, and they are magnetically attracted together under the action of the permanent magnet 505, so that the circuit breaker is in the open state. Similarly, when the circuit breaker is closed, the closing coil 510 is energized by the control circuit. The coil generates an attractive force through the electromagnetic induction principle, which causes the operating link 501, spring guide sleeve 502, spring guide rod 513, disc spring 514 and nut assembly 516 to pull the pull rod 2 upward. During the movement, the upper spring guide rod 513 of the operating link 501 first contacts the top magnet sheath 5041 and compresses the internal disc spring 514. Finally, the upper end face of the top outer edge 5191 is attached to the lower end face of the magnet sheath 504. Due to the presence of the permanent magnet 505, they are magnetically attracted together and held in place, so that the circuit breaker is in the closed state.

[0078] In one embodiment, the circuit breaker further includes an aviation connector 17, a closing indicator light 12, an opening indicator light 13, a junction box 14, and a digital module 15 (ADMU module). The aviation connector 17, closing indicator light 12, and opening indicator light 13 are arranged on the same side of the exterior of the housing 6, while the junction box 14 and the digital module 15 (ADMU) are arranged on opposite sides of the interior of the housing 6. The closing indicator light 12, opening indicator light 13, and terminal block 517 are each electrically connected to the junction box 14 inside the housing 6. This not only enables wiring control of the components inside the circuit breaker but also allows the indicator lights to indicate the circuit breaker's status, thus displaying the circuit breaker's open / closed status.

[0079] In this embodiment, the digital module 15 (ADMU) includes measurement, protection, analog adder, input signal, AD conversion, and protocol encoding control modules. One end of the digital module 15 (ADMU) is electrically connected to the aviation connector 17, and the other end is electrically connected to the electronic PT9, electronic CT10, and junction box 14, forming the control system of the pole-mounted circuit breaker. The zero-sequence voltage and current of the circuit breaker are calculated and synthesized by the digital module 15 (ADMU) from the voltage and current signals collected by the electronic PT9 and electronic CT10. The digital module 15 (ADMU) is responsible for converting the analog signals such as voltage and current collected by the electronic PT9 and electronic CT10 into digital signals, realizing the digital processing of the circuit breaker's operating status signals. The digital module 15 (ADMU) transmits the processed digital signals to the FTU (Feeder Terminal Unit), which performs real-time monitoring, fault protection, and opening / closing control of the circuit breaker based on the received digital signals. Ultimately, this achieves digital signal transmission and remote control of the electromagnetically controlled outdoor pole-mounted circuit breaker, realizing digital electromagnetic control of the outdoor pole-mounted circuit breaker. This utility model integrates the electronic PT9, electronic CT10, and vacuum interrupter 3 into a single structure using APG sealing technology, achieving a deep integration of primary and secondary physical spaces, ensuring miniaturization and ease of installation. Furthermore, the electromagnetic operating mechanism 5 of this application can completely replace the traditional spring operating mechanism. The electromagnetic operating mechanism 5 enables three-phase integrated direct-acting opening and closing operations, with low mechanical loss, high transmission efficiency, and rapid disconnection of power grid faults. The digital ADMU control module completes analog-to-digital conversion to digitize various parameters of the outdoor pole-mounted circuit breaker, realizing the digitalization of electromagnetic control of the outdoor pole-mounted circuit breaker.

[0080] This electromagnetically operated outdoor pole-mounted circuit breaker achieves synchronous opening and closing, arc extinguishing, and status monitoring of the three-phase circuit through the coordinated operation of the three-phase fusion pole 1, electromagnetic operating mechanism 5, three-phase connecting rod 7, and digital control system. The fusion pole 1 integrates a primary arc extinguishing unit and secondary sensing elements; the electromagnetic operating mechanism 5 provides driving force; the three-phase connecting rod 7 ensures three-phase synchronization; and the digital module 15 enables signal acquisition and intelligent control. All systems form a closed-loop operating system through mechanical connections and electrical signal transmission.

[0081] Operating method of electromagnetically operated outdoor pole-mounted circuit breaker:

[0082] I. Closing process:

[0083] S1, Coil Drive:

[0084] When the external control system issues a closing command, the FTU receives the command and outputs a drive voltage to the closing coil 510 through the junction box 14. After the closing coil 510 (ring winding) is energized, it generates an upward electromagnetic force. Since the closing coil 510 and the operating linkage 501 are arranged coaxially, the force is precisely applied axially to the magnetically conductive operating linkage 501.

[0085] S2, Power Transmission:

[0086] The operating linkage 501 moves axially upward under electromagnetic force. Its first end is rigidly connected to the insulating pull rod 2 of the intermediate pole 1 through the internal threaded hole 512, driving the insulating pull rod 2 to move upward synchronously. At the same time, the spring guide sleeve 502 (cylindrical structure) sleeved on the outside of the operating linkage 501 slides along the axial guide surface of the through hole of the cover 503, constraining radial offset and ensuring stable movement trajectory.

[0087] S3, Three-phase synchronous drive

[0088] The power of the operating link 501 is transmitted to the three-link link 7 through the rigid connection between the middle part and the three-link link 7. Since the three-link link 7 is a rectangular rigid metal rod, the power is evenly distributed to the three mounting positions along the rod body, synchronously driving the insulating pull rods 2 of the two pole posts 1 to move upward, realizing three-phase synchronous action.

[0089] S4. Contact closure:

[0090] When the insulating rod 2 moves upward, its top tip drives the moving contact of the vacuum interrupter 3 to move closer to the stationary contact. When the moving and stationary contacts come into contact, the three-phase circuit is turned on; due to the vacuum environment inside the vacuum interrupter 3, the generation of an electric arc at the moment the contacts close can be effectively suppressed.

[0091] S5. Buffer positioning and state maintenance:

[0092] During the closing process, the top spring guide rod 513 contacts the top magnet sleeve 5041, compressing the disc spring 514 to absorb kinetic energy, reducing the movement speed and avoiding rigid impact. Finally, the top outer edge 5191 fits into the top magnet sleeve 5041, and the permanent magnet 505 inside the sleeve generates sufficient magnetic attraction force to overcome the closing spring reaction force and lock the closing position.

[0093] S6. Status Feedback and Display

[0094] After the circuit breaker is closed, the digital module 15 collects the three-phase voltage and current signals through the electronic PT9 and electronic CT10 to confirm the closing status and upload it to the external system. At the same time, the junction box 14 supplies power to the closing indicator light 12, and the green LED lights up to realize status visualization.

[0095] II. Circuit Breaking Process:

[0096] S7, Command Trigger:

[0097] When a tripping command is received, the FTU disconnects the power supply to the closing coil 510 and outputs a drive voltage to the tripping coil 508. The tripping coil 508 is energized, generating an axially downward electromagnetic force that acts on the operating linkage 501 along the axial direction, driving it to move in the opposite direction.

[0098] S8. Power transmission and contact separation:

[0099] The operating linkage 501 drives the insulating pull rod 2 downward, and the three connecting rods 7 simultaneously drive the three pull rods 2 to move downward, separating the moving contact from the stationary contact of the vacuum interrupter 3, forming a vacuum break. The vacuum environment quickly extinguishes the arc, achieving synchronous disconnection of the three-phase circuit.

[0100] S9. Buffer positioning and state maintenance:

[0101] At the end of the tripping phase, the bottom spring guide rod 513 contacts the bottom magnet sleeve 5042, compressing the disc spring 514 for buffering, and the movement speed decreases. Finally, the bottom outer edge 5192 fits into the bottom magnet sleeve 5042, and the permanent magnet 505 generates sufficient magnetic attraction force to lock the tripping position. Even after the tripping coil is de-energized, it remains in the tripped state.

[0102] S10, Status Feedback:

[0103] After the circuit breaker is tripped, the digital module 15 collects the disconnection signal, confirms the tripping status, and uploads it; the junction box 14 supplies power to the tripping indicator light 13, the red LED lights up, and the status feedback is completed.

[0104] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0105] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electromagnetically operated outdoor pole-mounted circuit breaker, characterized in that, include: The pole (1) is provided with an arc extinguishing unit and a pull rod (2), and the first end of the pull rod (2) is connected to the arc extinguishing unit; Electromagnetic operating mechanism (5), including: A cover (503) having a through hole; An operating link (501) extends axially through the through hole, and the first end of the operating link (501) is connected to the second end of the pull rod (2). Spring guide sleeve (502), the spring guide sleeve (502) is sleeved on the operating link (501), and the outer side wall of the spring guide sleeve (502) slides in fit with the side wall of the through hole; Closing coil (510); And the tripping coil (508), the closing coil (510) and the tripping coil (508) are both coaxially sleeved on the outside of the operating link (501).

2. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 1, characterized in that, The number of poles (1) is three. The three poles (1) are arranged side by side at equal intervals on the mounting plane of the housing (6). Each pole (1) is fixedly connected to the housing (6).

3. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 2, characterized in that, The operating link (501) is coaxially arranged with the pull rod (2) of the pole post (1) in the middle position. The first end of the operating link (501) is provided with a three-link (7). The middle part of the three-link (7) is fixedly connected to the pull rod (2) of the pole post (1) in the middle. The two ends of the three-link (7) are respectively connected to the pull rods (2) of the pole post (1) on both sides.

4. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 1, characterized in that, The pole (1) is also provided with an inlet socket (8), an electronic PT (9), an electronic CT (10), and an outlet socket (11). The inlet socket (8) is fixed to the top of the pole (1), the electronic PT (9) is fixed to the side wall of the pole (1), and the electronic CT (10) is arranged in a ring around the outside of the outlet socket (11). One end of the outlet socket (11) is located inside the pole (1), and the other end extends to the outside of the pole (1).

5. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 1, characterized in that, The second end of the operating linkage (501) is provided with a limiting plate (518), the axis of the limiting plate (518) is collinear with the axis of the operating linkage (501), and the cover (503) is provided with a limiting end face on the side facing the limiting plate (518) for abutting against the limiting plate (518).

6. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 1, characterized in that, A magnetic sleeve (504) is connected to the cover (503), and the magnetic sleeve (504) is in contact with the inner end face of the cover (503); a side cover (506) is connected to the side of the cover (503), and the side cover (506) is flush with the inner end face of the cover (503); the spring guide sleeve (502) includes an outer eave (519) for abutting against the magnetic sleeve (504), and a permanent magnet (505) for attracting the outer eave (519) is provided in the magnetic sleeve (504).

7. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 6, characterized in that, The number of covers (503) is two, namely a top cover (5031) and a bottom cover (5032), which are arranged opposite to each other; the number of magnet sleeves (504) is two, namely a top magnet sleeve (5041) connected to the top cover (5031) and a bottom magnet sleeve (5042) connected to the bottom cover (5032); the number of side covers (506) is two, namely a top side cover (5061) connected to the top cover (5031) and a bottom side cover (5062) connected to the bottom cover (5032).

8. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 1, characterized in that, The first end of the operating link (501) is provided with an internal threaded hole (512), and the second end of the pull rod (2) is machined with an external thread that matches the internal threaded hole (512). The operating link (501) is threadedly connected to the second end of the pull rod (2) through the internal threaded hole (512).

9. The electromagnetically operated outdoor pole-mounted circuit breaker according to claim 6, characterized in that, The operating linkage (501) is provided with a disc-shaped structure (520), and there are two spring guide sleeves (502), namely a top spring guide sleeve (5021) and a bottom spring guide sleeve (5022); the top spring guide sleeve (5021) and the bottom spring guide sleeve (5022) are respectively provided with a top outer eave (5191) and a bottom outer eave (5192), and the top outer eave (5191) and the bottom outer eave (5192) are both in contact with the disc-shaped structure (520); the top outer eave (5191) and the bottom outer eave (5192) are both provided with a disc spring (514) and a spring guide rod (513), and the top outer eave (5191) and the bottom outer eave (5192) are both provided with guide holes for the spring guide rod (513) to be inserted.

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