An anti-vibration type pole-mounted circuit breaker integrated fixed pole

Abstract

This invention discloses an integrated solid-sealed pole of a vibration-resistant pole-mounted circuit breaker, relating to the technical field of outdoor switchgear for high-voltage power transmission and distribution. It includes a main housing, an upper column, and a lower column. An upper outgoing terminal is installed at the center of the top of the upper column. A vacuum interrupter is connected to the center of the inner wall of the upper column, with a fixed conductive rod fixedly connected to the top of the inner wall and a movable conductive rod slidably connected to the bottom of the inner wall. A contact is connected to the top of the movable conductive rod. A repulsion seat is installed at the center of the outer wall of the movable conductive rod, and a repulsion disk is installed at the bottom of the outer wall. A movable cavity is opened at the top of the inner wall of the lower column, with an upper air chamber at the top and a lower air chamber at the bottom. A movable chamber is opened at the bottom of the inner wall of the lower column, with an upper air chamber at the top and a lower air chamber at the bottom. An airflow channel is opened on one side of the middle of the lower column, and an airflow passage is opened on the other side of the middle.

Description

Technical Field

[0001] This invention relates to the field of high-voltage power transmission and distribution outdoor switchgear technology, specifically to an integrated solid-sealed pole of a vibration-resistant pole-mounted circuit breaker. Background Technology

[0002] An integrated solid-sealed pole post for a pole-mounted circuit breaker refers to a single, seamless, and indivisible insulated pole post unit that integrates components such as the vacuum interrupter, main conductive circuit, insulating tie rod, and even current sensor into a single, unseparated unit using epoxy resin automatic pressure gelation or vacuum casting processes. This one-piece pole post directly serves as the live-load pressure-bearing body of the pole-mounted vacuum circuit breaker, replacing the traditional pole post structure assembled from multiple separate insulating components.

[0003] Patent CN10071010A discloses a solid-sealed pole with a gas buffer device. This patent includes a stationary terminal, pole housing, vacuum interrupter, electrical connection conductor, moving terminal, repulsion disk, sealed gas chamber, gas buffer sidewall, moving conductive rod, insulating pull rod, connecting rod, tripping drive coil, sliding sealing device, vent, closing drive coil, bistable holding structure, and epoxy resin. This invention effectively reduces the number of effective components in a vacuum circuit breaker with an electromagnetic repulsion mechanism, forming a solid-sealed pole, achieving integration and improving insulation strength. The solid-sealed pole, applied to vacuum circuit breakers, is convenient to use, portable, flexible, and easy to maintain. In three-phase vacuum circuit breaker applications, it allows for the separate disassembly of the three poles, leveraging its portability. The addition of a gas buffer structure to the solid-sealed pole eliminates the need for traditional oil buffer components, reducing mechanical impacts during use, extending service life, and enhancing structural reliability.

[0004] The aforementioned comparative documents employ a single-sided, single-chamber repulsion plate structure, relying solely on a single sealed cavity to achieve generalized gas damping. The same gas resistance curve is used for both opening and closing, resulting in the inability to generate bidirectional gas pressure boost during opening. This limits the contact separation start-up speed, leading to a low instantaneous opening speed, a prolonged arcing time, and severe contact erosion. Furthermore, the closing mechanism lacks segmented damping, maintaining constant damping throughout the entire circuit. Insufficient damping results in severe impact, frequent bouncing, and repeated arcing during contact closure, accelerating contact welding failure. Conversely, excessive damping leads to insufficient closing driving force, making it difficult for the contacts to reach the designated position for reliable contact. Therefore, designing a circuit breaker that ensures a fast instantaneous opening speed and a slow instantaneous closing speed is the problem we aim to solve. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated solid-sealed pole for a vibration-resistant pole-mounted circuit breaker to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated solid-sealed pole of a vibration-resistant pole-mounted circuit breaker, comprising a main housing, an upper column, and a lower column. The upper column is connected to the top of the outer wall of the main housing, and the lower column is connected to the bottom. A sensor mounting base is connected to the middle of the outer wall of the main housing. An upper outgoing terminal is installed at the middle of the top of the upper column. A sensor signal outgoing terminal is provided inside the sensor mounting base. A vacuum interrupter is connected to the middle of the inner wall of the upper column. A fixed conductive rod is fixedly connected to the top of the inner wall of the vacuum interrupter, and a movable conductive rod is slidably connected to the bottom of the inner wall. A contact is connected to the top of the movable conductive rod. A repulsion seat is installed in the middle of the outer wall of the moving conductive rod, and a repulsion disk is installed at the bottom of the outer wall. A barrier seat is connected to the outer wall of the repulsion seat, and a rubber seat is sleeved on the outer wall of the barrier seat. A barrier ring is connected to the outer wall of the repulsion disk, and a rubber ring is sleeved on the outer wall of the barrier ring. A movable cavity is opened at the top of the inner wall of the lower column, with the top of the movable cavity being an upper air chamber and the bottom being a lower air chamber. A movable chamber is opened at the bottom of the inner wall of the lower column, with the top of the movable chamber being an upper air chamber and the bottom being a lower air chamber. An airflow channel is opened on one side of the middle of the lower column, and an airflow passage is opened on the other side of the middle, with the top of the airflow channel being a port and the bottom of the airflow passage being an end.

[0007] As the repulsion disk moves downward, it compresses the gas inside the lower air chamber, causing the gas in the lower air chamber to be transported to the upper air chamber through the airflow channel. The air pressure in the upper air chamber rises rapidly, creating a downward thrust on the repulsion seat and accelerating its descent. At the same time, the downward movement of the repulsion seat compresses the gas inside the lower air chamber, and the gas in the lower air chamber is transported to the upper air chamber through the airflow channel, increasing the air pressure in the upper air chamber and creating a downward thrust on the repulsion disk, further accelerating the downward speed of the overall transmission structure.

[0008] Preferably, both the movable cavity and the movable chamber are cylindrical with a smaller top and a larger bottom, and the rubber rings work together to continuously increase the damping of the moving conductive rod as it moves upward; the airflow channel is used to circulate gas between the upper air cavity and the lower air chamber, and the airflow passage is used to circulate gas between the lower air cavity and the upper air chamber; the repulsion seat and the repulsion disk work together with the coil to drive the moving conductive rod to move vertically.

[0009] The repulsion plate drives the conductive rod, contact, and repulsion seat to move upward synchronously. During the upward movement of the repulsion plate, the gas inside the upper air chamber is compressed, and the gas is transported to the lower air chamber through the airflow passage, which increases the air pressure in the lower air chamber and generates an upward thrust on the repulsion seat, accelerating the upward movement of the repulsion seat. At the same time, the upward movement of the repulsion seat compresses the gas inside the upper air chamber, and the gas is transported to the lower air chamber through the airflow passage, which increases the air pressure in the lower air chamber and generates an upward thrust on the repulsion plate, achieving rapid movement in the early stage of closing.

[0010] Preferably, the port is connected to the upper air chamber, the end is connected to the upper air chamber, and both the end and the port are horn-shaped. The barrier seat cooperates with the rubber seat to seal the port, and the barrier ring cooperates with the rubber ring to seal the end.

[0011] As the upward stroke progresses, the repulsion seat drives the blocking seat to gradually approach the port, causing the port to gradually narrow and the gas flow resistance to continuously increase. When the rubber seat completely covers and blocks the port, the upper air chamber forms a sealed and pressurized cavity, and the internal gas generates reverse pressure damping, which forms an upward buffer resistance on the repulsion seat. Simultaneously, the repulsion disk drives the blocking ring to gradually approach the end, and the gas flow path at the end is continuously restricted until the rubber ring blocks the end. The upper air chamber is sealed and pressurized, generating reverse damping, which synchronously buffers and decelerates the repulsion disk.

[0012] Preferably, the repulsion seat, the barrier seat, and the rubber seat are all located inside the movable cavity, and the outer wall of the rubber seat is in close contact with the inner wall of the movable cavity. The repulsion disk, the barrier ring, and the rubber ring are all located inside the movable cavity, and the wall of the rubber ring is in close contact with the inner wall of the movable cavity.

[0013] Both the moving chamber and the moving ring adopt a conical cylindrical structure that is smaller at the top and larger at the bottom, so that the upward damping of the rubber seat and rubber ring continuously increases with the stroke, while the downward damping gradually decreases. Based on this characteristic, the closing stroke of the moving conductor rod exhibits an action curve of rapid travel in the early stage and low-speed buffering and contact at the end.

[0014] Preferably, a rubber sleeve is connected to the bottom end of the inner wall of the lower column to buffer the downward-moving repulsive disk, and a base is fixedly connected to the bottom end of the outer wall of the lower column for installing the solid-sealed pole and the circuit breaker.

[0015] Preferably, a bushing is fitted in the middle of the outer wall of the vacuum interrupter to reduce the transmission of external vibrations to the core components of the vacuum interrupter. A double-ring anti-vibration locking and sealing structure is connected to the bottom of the outer wall of the vacuum interrupter. The double-ring anti-vibration locking and sealing structure includes a double-layer elastic locking retaining ring, and the retaining ring has a built-in damping rubber pad.

[0016] Preferably, the inner wall of the sensor mounting base is connected to a sealing limit cover, and the inner wall of the sealing limit cover is connected to a base. The base has plug-in terminals on both sides of the middle part, and slots are opened on the upper and lower sides.

[0017] The current transformer and energy harvesting coil are prefabricated into a ring sensing module. Electrical connection is achieved through bayonet limiting and flexible docking of plug-in terminals. The sensing signal is connected to an external FTU measurement and control device through the sensing signal output terminal. The sealing limit cover locks in place to achieve waterproof and dustproof sealing of the cavity.

[0018] As can be seen from the above, the integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker provided by the present invention has the following beneficial effects.

[0019] This device integrates a multi-chamber gas buffer mechanism to replace the oil buffer component. When the circuit is opened, the gas in the lower gas chamber and the lower gas cavity is sent into the upper gas chamber and the upper gas cavity through the corresponding channels to form a bidirectional air pressure boost, which makes the moving conductive rod descend smoothly and accelerates the downward speed of the moving conductive rod. The contacts are instantly pulled open to a safe opening distance, the arc is quickly lengthened and extinguished, the arc time is reduced, and the high temperature erosion and welding failure of the contacts are avoided.

[0020] In the early stage of closing, the rapid feeding of the rod is achieved by gas interconnection and pressurization. At the end of the stroke, the rubber seat and rubber ring respectively seal the port and end. The sealed cavity forms reverse air pressure damping. In addition, the upper and lower cavities of the movable cavity and movable chamber make the upward resistance gradually increase, realizing automatic speed reduction at the end of closing, preventing the contacts from high-speed impact and bounce, repeated arcing, and reducing the wear of the closing contacts.

[0021] A rubber sleeve is installed at the bottom of the lower column's inner cavity to provide flexible buffering and limiting of the repulsion plate at the lower limit position of the circuit breaker, preventing the repulsion plate from rigidly colliding with the lower column and reducing the impact load. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall main structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the overall front view sectional structure of the present invention; Figure 4 This is a schematic diagram of the main sectional view of the vacuum interrupter of the present invention; Figure 5 This is a side view of the sealing and limiting cover and base structure of the present invention; Figure 6 This is a three-dimensional structural diagram of the moving conductive rod and contact of the present invention; Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the repulsion disk of the present invention; Figure 8 This is a schematic diagram of the structure of the moving conductive rod in the downward separation state of the present invention. The arrow indicates the direction of air pressure. Figure 9 This is a schematic diagram of the structure of the moving conductive rod moving upward to contact the initial state of the present invention. The arrow indicates the direction of air pressure. Figure 10 This is a schematic diagram of the structure of the moving conductive rod moving upward to the contact end state of the present invention.

[0023] Figure 11 This is a schematic diagram of the three-dimensional cross-sectional structure of the repulsion seat of the present invention.

[0024] In the diagram: 1. Main housing; 2. Upper column; 3. Lower column; 4. Upper outgoing terminal; 5. Sensor mounting base; 6. Sensor signal output terminal; 7. Vacuum interrupter; 8. Fixed conductive rod; 9. Moving conductive rod; 10. Contact; 11. Repulsion seat; 12. Repulsion disk; 13. Barrier seat; 14. Rubber seat; 15. Barrier ring; 16. Rubber ring; 17. Movable cavity; 18. Movable chamber; 19. Airflow channel; 20. Airflow passage; 21. Port; 22. End; 23. Upper air chamber; 24. Lower air chamber; 25. Upper air chamber; 26. Lower air chamber; 27. Rubber sleeve; 28. Base; 29. ​​Bushing; 30. Double-ring anti-vibration locking sealing structure; 31. Sealing limit cover; 32. Base; 33. Plug-in terminal; 34. Bayonet. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-10 This invention provides a technical solution: an integrated solid-sealed pole of a vibration-resistant pole-mounted circuit breaker, comprising a main housing 1, an upper column 2, and a lower column 3. The upper column 2 is connected to the top of the outer wall of the main housing 1, and the lower column 3 is connected to the bottom. A sensor mounting base 5 is connected to the middle of the outer wall of the main housing 1. An upper outgoing terminal 4 is installed at the middle of the top of the upper column 2, and a sensor signal outgoing terminal 6 is provided inside the sensor mounting base 5. The upper outgoing terminal 4 is mounted on the top of the upper column 2, and the upper outgoing terminal 4 is connected downward to the fixed conductive part inside the vacuum interrupter 7. The rod 8 is electrically connected; the outer periphery of the vacuum interrupter 7 is fitted with a bushing 29, which reduces the transmission of epoxy vibration to the core of the interrupter; the lower end of the vacuum interrupter 7 is fastened to the moving conductive rod 9 through a double-ring anti-vibration locking and sealing structure 30. The double-ring anti-vibration locking and sealing structure 30 adopts a double-layer elastic locking retaining ring with built-in fluororubber damping pads to buffer the impact of opening and closing and the vibration of the outdoor environment, and prevent the conductive connection from loosening and overheating; the top of the moving conductive rod 9 is fixed with a contact 10, and the contact 10 and the lower end assembly of the fixed conductive rod 8 form the opening and closing contact of the interrupter.

[0027] The moving conductive rod 9 is fixed with a repulsion seat 11 and a repulsion disk 12 from top to bottom. A blocking seat 13 is fixed to the outer ring of the repulsion seat 11. A rubber seat 14 is interference-fitted to the outer side of the blocking seat 13. The entire assembly is housed in the movable cavity 17 at the top of the lower column 3. The outer edge of the rubber seat 14 is airtightly fitted to the inner wall of the movable cavity 17. A blocking ring 15 is fixed to the outer ring of the repulsion disk 12. A rubber ring 16 is fitted to the outer side of the blocking ring 15. The entire assembly is housed in the movable chamber 18 at the bottom of the lower column 3. The outer edge of the rubber ring 16 is airtightly fitted to the inner wall of the movable chamber 18. The movable cavity 17 is divided by the repulsion seat 11 to form an upper air chamber 23 and a lower air chamber 24. The movable chamber 18 is divided by the repulsion disk 12 to form an upper air chamber 25 and a lower air chamber 26.

[0028] The lower column 3 has a transversely opened airflow channel 19 and airflow passage 20 on its side wall; the upper end of the airflow channel 19 is a trumpet-shaped port 21 and connects to the upper air chamber 23, and the lower end of the airflow channel 19 connects to the lower air chamber 26; the lower end of the airflow passage 20 is a trumpet-shaped end 22 and connects to the upper air chamber 23, and the upper end of the airflow passage 20 connects to the lower air chamber 24; the repulsion seat 11 and the repulsion plate 12 are raised and lowered to drive the rubber seat 14 and the rubber ring 16 to achieve the sealing and conduction of the port 21 and the end 22; a rubber sleeve 27 is embedded at the bottom of the inner cavity of the lower column 3 as a downward limit anti-collision buffer pad for the repulsion plate 12; the bottom end of the lower column 3 is externally fixed to the base 28, and the base 28 is reserved with assembly screw holes to realize the locking and fixing of the pole column on the circuit breaker frame.

[0029] The main housing 1 has a protruding sensor mounting base 5 at its waist. The sensor mounting base 5 has a sealing limit cover 31 installed on its external interface. The sealing limit cover 31 has an annular base 32 fixed inside. The base 32 has plug-in terminals 33 arranged around its inner side, and a bayonet 34 is reserved on the end face of the base 32. The current transformer and the energy harvesting coil are prefabricated into an annular sensing module. Electrical connection is achieved through the bayonet 34 and the flexible docking of the plug-in terminals 33. The sensing signal is connected to the FTU measurement and control device through the sensing signal output terminal 6. The sealing limit cover 31 is locked to achieve waterproof and dustproof sealing of the cavity.

[0030] For specific implementation, please refer to Figure 4 and Figure 8 When the equipment performs the tripping action, which requires the moving conductive rod 9 to move down and drive the contact 10 to separate from the fixed conductive rod 8, the tripping coil is energized to generate electromagnetic repulsion, driving the repulsion disk 12 to move downward. The repulsion disk 12 simultaneously drives the moving conductive rod 9 to move downward as a whole, thereby causing the contact 10 at the top of the moving conductive rod 9 and the repulsion seat 11 in the middle of the rod to move downward simultaneously. At the same time, the repulsion seat 11 drives the blocking seat 13 and the rubber seat 14 to move downward as a whole, and the repulsion disk 12 simultaneously drives the blocking ring 15 and the rubber ring 16 to move downward.

[0031] During the downward movement of the repulsion disk 12, the gas inside the lower air chamber 26 is compressed, causing the gas in the lower air chamber 26 to be transported to the upper air chamber 23 through the airflow channel 19. The air pressure in the upper air chamber 23 increases rapidly, forming a downward thrust on the repulsion seat 11 and accelerating its downward movement. At the same time, the downward movement of the repulsion seat 11 compresses the gas inside the lower air chamber 24, and the gas in the lower air chamber 24 is transported to the upper air chamber 25 through the airflow channel 20. This increases the air pressure in the upper air chamber 25 and forms a downward thrust on the repulsion disk 12, making the moving conductive rod 9 descend smoothly and further accelerating the downward speed of the overall transmission structure. The rubber sleeve 27 at the bottom of the lower column 3 can provide flexible buffering for the repulsion disk 12 after it has moved into place, avoiding rigid collision damage to the components.

[0032] Through the boosting action, the moving conductive rod 9 can drive the contact 10 to move down quickly and smoothly, so that the contact 10 and the fixed conductive rod 8 can be separated quickly and pulled apart to a safe insulation distance. This effectively lengthens the opening arc, realizes rapid arc extinguishing, prevents the arc from burning the contact surface of the contact 10 for a long time, reduces the risk of contact 10 burning, welding and other faults, and ensures the reliability of opening and closing.

[0033] When the device performs the closing action, the moving conductive rod 9 needs to move upward to drive the contact 10 to close contact with the fixed conductive rod 8. The closing coil is energized to generate an upward electromagnetic repulsion force, which drives the repulsion disk 12 to move upward. The repulsion disk 12 drives the moving conductive rod 9, the contact 10 and the repulsion seat 11 to move upward synchronously. During the upward movement of the repulsion disk 12, the gas inside the upper air chamber 25 is squeezed. The gas is transported to the lower air chamber 24 through the airflow passage 20, which increases the air pressure in the lower air chamber 24 and generates an upward thrust on the repulsion seat 11, accelerating the upward movement of the repulsion seat 11. At the same time, the upward movement of the repulsion seat 11 squeezes the gas inside the upper air chamber 23. The gas is transported to the lower air chamber 26 through the airflow passage 19, which increases the air pressure in the lower air chamber 26 and generates an upward thrust on the repulsion disk 12, realizing rapid movement in the early stage of closing.

[0034] As the upward stroke progresses, the repulsion seat 11 drives the blocking seat 13 to gradually approach the port 21, and the port 21 gradually narrows, increasing the resistance to gas flow. When the rubber seat 14 completely covers and blocks the port 21, the upper air chamber 23 forms a sealed and pressurized cavity, and the internal gas generates reverse pressure damping, which forms an upward buffer resistance on the repulsion seat 11. Simultaneously, the repulsion disk 12 drives the blocking ring 15 to gradually approach the end 22, and the gas flow passage at the end 22 is continuously restricted until the rubber ring 16 blocks the end 22. The upper air chamber 25 is sealed and pressurized, generating reverse damping, which synchronously buffers and decelerates the repulsion disk 12.

[0035] Both the movable cavity 17 and the movable chamber 18 adopt a conical cylindrical structure that is smaller at the top and larger at the bottom. This causes the upward damping of the rubber seat 14 and the rubber ring 16 to continuously increase with the stroke, while the downward damping gradually decreases. Based on this characteristic, the closing stroke of the moving conductive rod 9 exhibits a motion curve of rapid movement in the early stage and low-speed buffering and contact at the end. This avoids high-speed rigid impact between the contact 10 and the stationary conductive rod 8, prevents the contact 10 from bouncing back and arcing, reduces the erosion loss of the contact 10 during the closing process, and improves the closing stability and service life of the circuit breaker.

[0036] This device integrates a multi-chamber gas buffer mechanism to replace the oil buffer component. When the circuit is opened, the gas in the lower gas chamber 26 and the lower gas chamber 24 is sent into the upper gas chamber 23 and the upper gas chamber 25 through the corresponding channels to form a bidirectional air pressure boost, which accelerates the downward speed of the moving conductive rod 9. The contact 10 is instantly pulled open to a safe opening distance, the arc is quickly lengthened and extinguished, the arc time is reduced, and the contact 10 is prevented from high temperature erosion and welding failure.

[0037] In the early stage of closing, the rapid feeding of the rod is achieved by gas interconnection and pressurization. At the end of the stroke, the rubber seat 14 and the rubber ring 16 respectively block the port 21 and the end 22. The sealed cavity forms reverse air pressure damping. In addition, the upper and lower cavities of the movable cavity 17 and the movable chamber 18 make the upward resistance gradually increase, realize the automatic speed reduction at the end of closing, prevent the contact 10 from high-speed impact and bounce, and repeatedly arc, and reduce the wear of the closing contact 10.

[0038] A rubber sleeve 27 is installed at the bottom of the inner cavity of the lower column 3 to provide flexible buffering and limiting of the repulsion plate 12 at the lower limit position of the circuit breaker, so as to avoid rigid collision between the repulsion plate 12 and the lower column 3 and reduce the impact load.

[0039] The sensor mounting base 5 is equipped with a base 32 with a bayonet 34 and a plug-in terminal 33. The sensing module composed of the current transformer and the energy harvesting coil can be positioned by the bayonet 34 and flexibly connected by the plug-in terminal 33 to achieve quick assembly and disassembly. Faulty sensing elements can be inspected and replaced separately without breaking the epoxy-sealed body of the main housing 1, thus shortening the time for equipment power outage maintenance.

[0040] In practical use, the fixed conductive rod 8 is assembled onto the upper end of the vacuum interrupter 7 in sequence, and the contact 10 is fixed to the top of the moving conductive rod 9. The upper end of the moving conductive rod 9 is locked to the lower end of the vacuum interrupter 7 through the double-ring anti-vibration locking and sealing structure 30. The outer side of the vacuum interrupter 7 is fitted with a bushing 29 to complete the vibration reduction pre-assembly. The repulsion seat 11 and the repulsion disk 12 are tightened from top to bottom on the moving conductive rod 9 in sequence. The outer side of the barrier seat 13 is fitted with a rubber seat 14 and fixed to the outer ring of the repulsion seat 11. The outer side of the barrier ring 15 is fitted with a rubber ring 16 and fixed to the outer ring of the repulsion disk 12. The above assembly is installed into the movable cavity 17 and movable chamber 18 of the lower column 3 to ensure that the rubber seat 14 and the rubber ring 16 are airtightly fitted to the inner wall of the movable cavity 17 and the movable chamber 18, respectively. The assembled arc-extinguishing chamber assembly and transmission assembly are placed into the mold. The main housing 1, upper column 2, and lower column 3 are integrally sealed and cast with epoxy resin APG. The upper output terminal 4 is installed at the top of the upper column 2 and electrically connected to the fixed conductive rod 8. The bottom of the lower column 3 is pre-installed with a rubber sleeve 27 and a fixed base 28. The base 32 with plug-in terminals 33 and bayonet 34 is installed inside the sensor mounting base 5 on the outside of the main housing 1. The ring sensor module integrating the current transformer and the energy harvesting coil is installed through the mounting base opening. It is limited by the bayonet 34 and the elastic connection of the plug-in terminal 33 is used for conduction. The sensor signal line is connected to the sensor signal output terminal 6. Finally, the sealing limit cover 31 is locked to complete the cavity sealing. The entire solidified pole is locked and fixed to the pole-mounted circuit breaker frame through the screw hole reserved in the base 28. The upper output terminal 4 is connected to the primary input line, and the sensor signal output terminal 6 is connected to the field FTU measurement and control device.

[0041] The tripping operation process is as follows: The control system issues a tripping command, the tripping coil is energized, generating a downward electromagnetic repulsion force, driving the repulsion disk 12 to move downward, synchronously driving the conductive rod 9, contact 10, and repulsion seat 11 to move downward as a whole. The repulsion seat 11, along with the blocking seat 13 and rubber seat 14, moves downward, and the repulsion disk 12, along with the blocking ring 15 and rubber ring 16, moves downward synchronously. The downward movement of the repulsion disk 12 compresses the gas in the lower air chamber 26 of the active chamber 18. The gas is sent into the upper air chamber 23 through the airflow channel 19, and the pressure in the upper air chamber 23 increases, forming a force on the repulsion seat 11. The repulsion plate 12 is pushed downwards; at the same time, the repulsion seat 11 moves down to compress the gas in the lower air chamber 24 of the movable chamber 17. The gas is sent into the upper air chamber 25 through the airflow passage 20. The pressure in the upper air chamber 25 pushes the repulsion plate 12 downwards a second time, accelerating the downward movement of the entire transmission component. The moving conductive rod 9 drives the contact 10 to quickly move away from the fixed conductive rod 8. The contact 10 is quickly pulled open to a safe distance, and the electric arc is quickly extinguished. When the repulsion plate 12 moves down to the limit position, it touches the rubber sleeve 27. The rubber sleeve 27 provides flexible buffering and limiting, avoiding rigid impact, and the opening action is completed.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. An integrated solid-sealed pole of a vibration-resistant pole-mounted circuit breaker, comprising a main housing (1), an upper column (2), and a lower column (3), wherein the upper column (2) is connected to the top of the outer wall of the main housing (1), the lower column (3) is connected to the bottom, and a sensor mounting base (5) is connected to the middle of the outer wall of the main housing (1); an upper outgoing terminal (4) is installed at the middle of the top of the upper column (2); and a sensor signal outgoing terminal (6) is provided inside the sensor mounting base (5), characterized in that: A vacuum interrupter (7) is connected to the middle of the inner wall of the upper column (2), and a fixed conductive rod (8) is fixedly connected to the top of the inner wall of the vacuum interrupter (7), and a movable conductive rod (9) is slidably connected to the bottom of the inner wall. A contact (10) is connected to the top of the movable conductive rod (9). A repulsion seat (11) is installed in the middle of the outer wall of the movable conductive rod (9), and a repulsion disk (12) is installed at the bottom of the outer wall. A barrier seat (13) is connected to the outer wall of the repulsion seat (11), and a rubber seat (14) is sleeved on the outer wall of the barrier seat (13). A barrier ring (15) is connected to the outer wall of the repulsion disk (12). The outer wall is fitted with a rubber ring (16). The top of the inner wall of the lower column (3) is provided with a movable cavity (17), and the top of the movable cavity (17) is an upper air cavity (23) and the bottom is a lower air cavity (24). The bottom of the inner wall of the lower column (3) is provided with a movable chamber (18), and the top of the movable chamber (18) is an upper air chamber (25) and the bottom is a lower air chamber (26). The middle side of the lower column (3) is provided with an airflow channel (19) and the other side of the middle is provided with an airflow passage (20), and the top of the airflow channel (19) is a port (21) and the bottom of the airflow passage (20) is an end (22).

2. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 1, characterized in that: Both the active cavity (17) and the active chamber (18) are cylindrical with a smaller top and a larger bottom. The rubber ring (16) and the rubber ring (16) together increase the damping of the moving conductive rod (9) as it moves upward. The airflow channel (19) is used to circulate the gas in the upper air cavity (23) and the lower air chamber (26), and the airflow passage (20) is used to circulate the gas in the lower air cavity (24) and the upper air chamber (25). The repulsion seat (11) and the repulsion disk (12) together with the coil drive the moving conductive rod (9) to move vertically.

3. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 2, characterized in that: The port (21) is connected to the upper air chamber (23), and the end (22) is connected to the upper air chamber (23). Both the end (22) and the port (21) are horn-shaped. The barrier seat (13) and the rubber seat (14) are used to close the port (21), and the barrier ring (15) and the rubber ring (16) are used to close the end (22).

4. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 3, characterized in that: The repulsion seat (11), the barrier seat (13) and the rubber seat (14) are all located inside the active cavity (17), and the outer wall of the rubber seat (14) is tightly fitted with the inner wall of the active cavity (17). The repulsion disk (12), the barrier ring (15) and the rubber ring (16) are all located inside the active chamber (18), and the wall of the rubber ring (16) is tightly fitted with the inner wall of the active chamber (18).

5. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 4, characterized in that: The bottom of the inner wall of the lower column (3) is connected to a rubber sleeve (27) to buffer the downward-moving repulsive disk (12), and the bottom of the outer wall of the lower column (3) is fixedly connected to a base (28) for installing the solid-sealed pole and the circuit breaker.

6. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 1, characterized in that: A bushing (29) is fitted in the middle of the outer wall of the vacuum interrupter (7) to reduce the transmission of external vibration to the core component of the vacuum interrupter (7). A double-ring anti-vibration locking seal structure (30) is connected to the bottom of the outer wall of the vacuum interrupter (7). The double-ring anti-vibration locking seal structure (30) includes a double-layer elastic locking retaining ring, and the retaining ring has a built-in damping rubber pad.

7. The integrated solid-sealed pole of the vibration-resistant pole-mounted circuit breaker according to claim 6, characterized in that: The sensor mounting base (5) has a sealing limit cover (31) connected to its inner wall, and a base (32) is connected to the inner wall of the sealing limit cover (31). The base (32) has plug terminals (33) connected to both sides of its middle section, and slots (34) are provided on its upper and lower sides.

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