Primary and secondary fusion pole-mounted circuit breaker capable of improving closing efficiency

Abstract

The invention relates to a primary and secondary fusion pole-mounted circuit breaker capable of improving closing efficiency, and relates to the technical field of circuit breakers, the primary and secondary fusion pole-mounted circuit breaker comprises a circuit breaker box body, a solid-sealed polar pole, an arc extinguish chamber, a moving contact, a static contact, an electromagnetic spiral assembly, a spring energy storage piece and an opening limiting piece, the solid-sealed polar pole is arranged on the circuit breaker box body, and a cavity is formed in the solid-sealed polar pole; the static contact is arranged on the solid-sealed polar pole, the electromagnetic spiral assembly is arranged on the solid-sealed polar pole, the moving contact is arranged on the electromagnetic spiral assembly, the electromagnetic spiral assembly is used for driving the moving contact to be separated from the static contact, and the spring energy storage part is arranged on the moving contact and used for converting kinetic energy into elastic potential energy in the opening process to store energy so that closing can be facilitated. According to the primary and secondary fusion pole-mounted circuit breaker, the switching-on efficiency of the primary and secondary fusion pole-mounted circuit breaker can be improved through the electromagnetic spiral assembly, the spring energy storage piece and the switching-off limiting piece, and integration with an automatic system is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, in particular to a primary-secondary fusion column mounted circuit breaker capable of improving closing efficiency. Background Art

[0002] The primary and secondary integrated pole-mounted circuit breaker is an intelligent power device that integrates primary equipment (such as pole-mounted circuit breakers) and secondary equipment (such as feeder terminals FTU). It realizes the measurement, control, protection and automation functions of the circuit by integrating advanced technologies such as electronic voltage sensors, current sensors, and electric energy metering modules.

[0003] At present, the Chinese invention patent application with the publication date of February 18, 2025 and the publication number of CN 119480536A proposes a primary and secondary integrated pole-mounted circuit breaker, which relates to the technical field of electrical equipment, including a circuit breaker body, a plurality of sealed poles connected to the circuit breaker, the sealed poles include an incoming line side and an outgoing line side, the incoming line side is connected with a wiring unit, the wiring unit includes a wiring row, a wiring bolt movably arranged in the wiring row and threadedly connected to the incoming line side, and a wiring nut threadedly connected to the wiring bolt, the wiring nut is arranged between the wiring row and the incoming line side; the wiring row includes a wiring part and a clamping part connected to the wiring part, the clamping part is sleeved on the wiring bolt rod, the end of the clamping part away from the wiring part is provided with a crack and connected with a fastener, and the clamping part, the wiring bolt and the wiring nut are covered with a protective cover on the outside. The wiring stability of the incoming line side of the present application is high, which effectively reduces the possibility of power accidents, is stable and reliable, and is suitable for use in places with harsh environments.

[0004] However, the primary and secondary integrated pole-mounted circuit breakers need to be manually closed during the closing process. Manual closing requires on-site operation by operators, which may easily cause equipment damage or personal safety accidents due to misoperation or non-standard operation. Manual closing cannot be integrated with the automation system, and remote control and automatic reclosing functions cannot be realized, which reduces the intelligence level of the power grid and reduces operational efficiency.

[0005] Therefore, it is necessary to provide a primary-secondary fusion pole-mounted circuit breaker that can improve closing efficiency to solve the above problems. Summary of the invention

[0006] In order to improve the closing efficiency of a primary-secondary fused pole-mounted circuit breaker and realize integration with an automation system, the present invention provides a primary-secondary fused pole-mounted circuit breaker capable of improving the closing efficiency.

[0007] The present invention provides a primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency comprises a circuit breaker housing, a sealed pole, an arc extinguishing chamber, a moving contact, a static contact, an electromagnetic spiral assembly, a spring energy storage component and a switch-off limiter. The sealed pole is arranged on the circuit breaker housing, a cavity is provided on the sealed pole, the static contact is arranged on the sealed pole, the electromagnetic spiral assembly is arranged on the sealed pole, the moving contact is arranged on the electromagnetic spiral assembly, the electromagnetic spiral assembly is used for carrying the moving contact to separate from the static contact, the spring energy storage component is arranged on the moving contact, and is used for converting kinetic energy into elastic potential energy to store energy during the switch-off process to facilitate closing, and the switch-off limiter is arranged on the circuit breaker housing, and is used for fixing the moving contact during the switch-off process.

[0008] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: when the operator uses the primary and secondary fusion column-mounted circuit breaker, in the case of a short circuit, the current rises to ten to one hundred times the normal current within a few milliseconds, and the electromagnetic spiral assembly separates the moving contact from the static contact, and at the same time, the kinetic energy brought by the electromagnetic spiral assembly is converted into the elastic potential energy of the spring through the spring energy storage component, and the opening limiter fixes the moving contact. In the process of closing the circuit breaker, the opening limiter releases the fixation of the moving contact, and the spring energy storage component converts the elastic potential energy of the spring into kinetic energy, thereby facilitating closing the circuit breaker.

[0009] In some embodiments, the opening limit member includes a fixed column, a connecting block, a cylinder, an abutment spring and a limit block, the fixed column is arranged on the circuit breaker box, the connecting block is movably arranged on the fixed column, a connecting hole is provided on the connecting block, one end of the cylinder is arranged in the connecting hole, the limit block is provided on the other end of the cylinder, the abutment spring is sleeved on the cylinder, one end of the abutment spring abuts on the connecting block, the other end of the abutment spring abuts on the limit block, and a limit groove is provided on the fixed column.

[0010] In some embodiments, the fixing column is provided with a thread, and the connecting block is provided with a thread groove.

[0011] In some embodiments, the spring energy storage component includes a diamond block, an abutment plate, a connecting column, a rotating plate and a transmission block. The diamond block is fixedly set on the connecting block, the connecting column is rotatably set on an end of the connecting block away from the fixed column, the abutment plate is set on an end of the connecting column away from the connecting block, the rotating plate is rotatably set on the abutment plate, and the transmission block is set on the rotating plate, which is used for abutting the diamond block during the rotation of the diamond block.

[0012] In some embodiments, the rotating plate is also rotatably provided with a connecting seat, and an energy storage spring is also provided on the connecting seat.

[0013] In some embodiments, an arc extinguishing chamber is disposed in the sealed pole, the electromagnetic spiral assembly is disposed in the arc extinguishing chamber, and the moving contact is disposed on the arc extinguishing chamber through the electromagnetic spiral assembly.

[0014] In some embodiments, the electromagnetic spiral assembly includes an iron cylinder, a pin, a compression spring, a winding and a coil, the winding is arranged on the arc extinguishing chamber, the coil is arranged on the winding, the iron cylinder is arranged on the moving contact, the pin is arranged on the end of the iron cylinder away from the moving contact, the end of the pin away from the iron cylinder passes through the arc extinguishing chamber, the compression spring is sleeved on the pin, one end of the compression spring abuts against the iron cylinder, and the other end of the compression spring abuts against the arc extinguishing chamber.

[0015] In some embodiments, the static contact is provided with an input terminal, the moving contact is provided with a lower output line, the other end of the lower output line is provided on the winding, a connecting soft wire is provided at one end of the winding away from the lower output line, and the end of the connecting soft wire away from the winding is connected to the output terminal.

[0016] In some embodiments, an insulating protective tube is fixedly provided on the end of the pin away from the iron cylinder, and a connecting spring is provided on the end of the insulating protective tube away from the pin, one end of the connecting spring abuts against the insulating protective tube, and the other end of the connecting spring abuts against the circuit breaker box, and the insulating protective tube passes through the circuit breaker box and abuts against the abutment plate.

[0017] In some embodiments, a pointer slot is provided on the circuit breaker housing, a connection pointer is provided on the abutment plate, the connection pointer passes through the pointer slot, and an opening and closing display panel is provided on the circuit breaker housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to an embodiment of the present application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 It is a schematic diagram of the cross-sectional structure of the pole-sealed pole on the pole according to the embodiment of the present application; Figure 4 This is a schematic cross-sectional structure diagram of a circuit breaker box according to an embodiment of the present application; Figure 5 It is an enlarged structural schematic diagram of the electromagnetic spiral assembly of the embodiment of the present application; Figure 6 This is an enlarged structural schematic diagram of a spring energy storage component according to an embodiment of the present application; Figure 7 This is a schematic diagram of the exploded structure of the opening and closing limiter of the embodiment of the present application; Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0019] Among them, the reference numerals in the figure are: 1. Circuit breaker housing; 11. Encapsulated pole; 12. Cavity; 13. Arc extinguishing chamber; 14. Moving contact; 15. Static contact; 2. Electromagnetic spiral assembly; 21. Iron cylinder; 22. Pin; 23. Compression spring; 24. Winding; 25. Coil; 3. Spring energy storage component; 31. Diamond block; 32. Abutment plate; 33. Connecting column; 34. Rotating plate; 35. Connecting seat; 36. Energy storage spring; 37 , transmission block; 4, opening limiter; 41, fixing column; 42, connecting block; 43, cylinder; 44, abutment spring; 45, limiter block; 46, limiter groove; 47, thread; 48, thread groove; 5, insulating protective tube; 51, connecting spring; 52, incoming terminal; 53, outgoing terminal; 54, lower outlet; 55, connecting soft wire; 6, connecting pointer; 61, pointer groove; 62, opening and closing display board. DETAILED DESCRIPTION

[0020] In order to improve the closing efficiency of the primary and secondary fusion pole-mounted circuit breaker and realize integration with the automation system, the embodiment of the present application provides the following solution.

[0021] Please also read Figures 1 to 8 , including a circuit breaker box 1, a sealed pole 11, an arc extinguishing chamber 13, a moving contact 14, a static contact 15, an electromagnetic spiral assembly 2, a spring energy storage component 3 and a switch-off limiter 4. The sealed pole 11 is arranged on the circuit breaker box, and a cavity 12 is opened on the sealed pole 11. The static contact 15 is arranged on the sealed pole 11. The electromagnetic spiral assembly 2 is arranged on the sealed pole 11. The moving contact 14 is arranged on the electromagnetic spiral assembly 2. The electromagnetic spiral assembly 2 is used to separate the moving contact 14 from the static contact 15. The spring energy storage component 3 is arranged on the moving contact 14, and is used to convert kinetic energy into elastic potential energy to store energy for facilitating closing during the opening process. The switch-off limiter 4 is arranged on the circuit breaker box 1, and is used to fix the moving contact 14 during the opening process.

[0022] In some embodiments, please refer to Figures 4 to 5The arc extinguishing chamber 13 is arranged in the sealed pole 11, the electromagnetic spiral assembly 2 is arranged in the arc extinguishing chamber 13, the moving contact 14 is arranged on the arc extinguishing chamber 13 through the electromagnetic spiral assembly 2, the electromagnetic spiral assembly 2 includes an iron cylinder 21, a pin 22, a compression spring 23, a winding 24 and a coil 25, the winding 24 is arranged on the arc extinguishing chamber 13, the coil 25 is arranged on the winding 24, the iron cylinder 21 is arranged on the moving contact 14, the pin 22 is arranged on the end of the iron cylinder 21 away from the moving contact 14, and the pin 22 The end away from the iron cylinder 21 passes through the arc extinguishing chamber 13, the compression spring 23 is sleeved on the pin 22, one end of the compression spring 23 abuts on the iron cylinder 21, and the other end of the compression spring 23 abuts on the arc extinguishing chamber 13. The static contact 15 is provided with an incoming terminal 52, and the moving contact 14 is provided with a lower outgoing line 54, the other end of the lower outgoing line is provided on the winding 24, and a connecting soft wire 55 is provided at one end of the winding 24 away from the lower outgoing line 54, and the end of the connecting soft wire 55 away from the winding 24 is connected to the outgoing terminal 53.

[0023] With such arrangement, when the operator uses the primary and secondary fusion column circuit breaker, in the case of a short circuit, the current rises to ten to one hundred times the normal current within a few milliseconds, the current reaches the moving contact 14 through the static contact 15, reaches the lower outlet line 54 through the moving contact 14, and reaches the outlet terminal 53 after bypassing the coil 25 through the connecting soft wire 55. After the current rises, the current passes through the coil 25 to generate a magnetic field, thereby generating a force to pull the iron cylinder 21 downward, thereby separating the moving contact 14 and the static contact 15 from each other, and the arc extinguishing chamber 13 helps to extinguish the arc generated when the static contact 15 is separated from the moving contact 14. In this way, in the case of a short circuit, the current will quickly rise to ten to one hundred times the normal current within a few milliseconds. The primary and secondary fusion pole-mounted circuit breaker can quickly detect this abnormal situation and cut off the circuit in a very short time through the electromagnetic tripping mechanism to prevent the fault current from further expanding and protect the safety of equipment and lines. The primary and secondary fusion pole-mounted circuit breaker adopts a modular design and a highly integrated electronic sensor, which has higher operating stability and reliability. Its fully integrated design reduces the interface problems between devices and improves the overall reliability and service life of the equipment. The primary and secondary fusion pole-mounted circuit breaker has an automatic reclosing function, which can automatically restore power supply after the fault is cleared, which not only improves the continuity of power supply, but also reduces the need for manual intervention and improves operation and maintenance efficiency. In addition to short-circuit protection, the device also has overcurrent protection, ground fault detection and other functions. Overcurrent protection is achieved through the magnetic induction coil 25. When the current exceeds the set value, the circuit breaker will operate to protect the line and equipment. The primary and secondary fusion pole-mounted circuit breaker provides reliable electrical isolation in the open state to ensure the safety of inspection and maintenance personnel. It has a high protection level and can adapt to various harsh environmental conditions.

[0024] In some embodiments, please refer to Figures 6 to 8The switch-off limiter 4 includes a fixed column 41, a connecting block 42, a cylinder 43, an abutting spring 44 and a limiting block 45. The fixed column 41 is arranged on the circuit breaker box 1, the connecting block 42 is movably arranged on the fixed column 41, a connecting hole is provided on the connecting block 42, one end of the cylinder 43 is arranged in the connecting hole, the limiting block 45 is arranged on the other end of the cylinder 43, the abutting spring 44 is sleeved on the cylinder 43, one end of the abutting spring 44 abuts on the connecting block 42, and the other end of the abutting spring 44 abuts on the limiting block 45, a limiting groove 46 is provided on the fixed column 41, a thread 47 is provided on the fixed column 41, and the connecting block 4 2 is provided with a thread groove 48, the spring energy storage member 3 includes a diamond block 31, an abutment plate 32, a connecting column 33, a rotating plate 34 and a transmission block 37, the diamond block 31 is fixedly arranged on the connecting block 42, the connecting column 33 is rotatably arranged on one end of the connecting block 42 away from the fixed column 41, the abutment plate 32 is arranged on one end of the connecting column 33 away from the connecting block 42, the rotating plate 34 is rotatably arranged on the abutment plate 32, and the transmission block 37 is arranged on the rotating plate 34 for abutting the diamond block 31 during the rotation of the diamond block 31. The rotating plate 34 is also rotatably arranged with a connecting seat 35, and the connecting seat 35 is also provided with an energy storage spring 36.

[0025] An insulating protective tube 5 is fixedly provided on one end of the pin 22 away from the iron cylinder 21, and a connecting spring 51 is provided on one end of the insulating protective tube 5 away from the pin 22. One end of the connecting spring 51 abuts against the insulating protective tube 5, and the other end of the connecting spring 51 abuts against the circuit breaker box 1. The insulating protective tube 5 passes through the circuit breaker box 1 and abuts against the abutting plate 32.

[0026] With such arrangement, during the process of pressing down the pin 22, the pin 22 presses the insulating protective tube 5, thereby pressing the connecting spring 51. At the same time, the insulating protective tube 5 presses the abutting plate 32. The abutting plate 32 pushes the connecting block 42 to rotate on the thread 47 on the fixed column 41, thereby driving the diamond block 31 to rotate and abut against the transmission block 37. The transmission quickly drives the rotating plate 34 to rotate on the abutting plate 32, thereby driving the energy storage spring 36 on the connecting seat 35 to open, and converts the kinetic energy generated by the electromagnetic into the elastic potential energy of the spring. At the same time, when the connecting block 42 rotates on the fixed column 41, the inclined surface of the triangular limit block 45 presses the cylinder 43 and the abutting spring 44. When reaching the limit groove 46 on the fixed column 41, the abutting spring 44 and the cylinder 43 rebound to help limit. The block 45 abuts against the limit groove 46, so that the limit block 45 fixes the connection block 42 to the column 41, maintaining the separation between the static contact 15 and the moving contact 14; in the process of detecting that the circuit breaker can be closed, the cylinder 43 drives the abutment spring 44 to compress and drive the limit block 45 to retract, and at the same time, the energy storage spring 36 retracts and drives the transmission block 37 to squeeze the diamond block 31, accelerating the rotation, thereby driving the connection block 42 to rise on the thread 47 on the fixed column 41, driving the connection spring 51 and the insulating protective tube 5 to rise together, the connection spring 51 assists in driving the insulating protective tube 5 to rise, and at the same time, the insulating protective tube 5 drives the pin 22 and the iron cylinder 21 to rise, and the compression spring 23 assists in rising, thereby bringing the moving contact 14 and the static contact 15 together to complete the closing.In this way, during the downward pressing process of the pin 22, a series of precise mechanical transmissions, including the coordinated work of the insulating protective tube 5, the connecting spring 51, the abutting plate 32, the connecting block 42, the diamond block 31, the transmission block 37 and the rotating plate 34, ensure the accuracy and reliability of the circuit breaker opening action. This design can effectively prevent false operations and improve the operating accuracy of the circuit breaker. During the opening process, the energy storage spring 36 is opened to convert the kinetic energy generated by the electromagnetic into the elastic potential energy of the spring. This design not only improves the energy utilization efficiency, but also provides a stable power source when the circuit breaker needs to be closed, ensuring the rapid and reliable closing action. The limit block 45 and the cylinder 43 play a key role in the opening process. When the connecting block 42 rotates on the fixing column 41, the spring limit block 45 presses the cylinder 43 and the abutment spring 44 through the inclined surface to ensure that the limit block 45 can accurately abut when it reaches the limit groove 46, and fix the connecting block 42 in the limit groove 46 through the rebound force of the cylinder 43 and the abutment spring 44. This design ensures the stability and reliability of the circuit breaker in the opening state. In the process of detecting that the circuit breaker can be closed, the cylinder 43 drives the abutment spring 44 to compress, the limit block 45 retracts, and at the same time, the energy storage spring 36 retracts to drive the transmission block 37 to squeeze the diamond block 31 , accelerate the rotation, this intelligent closing control mechanism can automatically adjust the closing speed and strength according to the actual situation, ensure the smooth and reliable closing action, during the rising process of the thread 47 of the connecting block 42 on the fixed column 41, the connecting spring 51 and the insulating protective tube 5 rise together, the connecting spring 51 assists in driving the insulating protective tube 5 to rise, and at the same time, the insulating protective tube 5 drives the pin 22 and the iron cylinder 21 to rise, and the compression spring 23 assists in rising. This multiple protection mechanism ensures the stability and safety of the circuit breaker during the closing process, prevents misoperation caused by mechanical failure, and the thread 47 of the connecting block 42 on the fixed column 41 rises. In the process, the connecting spring 51 and the insulating protective tube 5 rise together, and the connecting spring 51 assists in driving the insulating protective tube 5 to rise. At the same time, the insulating protective tube 5 drives the pin 22 and the iron cylinder 21 to rise, and the compression spring 23 assists in rising. This multiple protection mechanism ensures the stability and safety of the circuit breaker during the closing process, and prevents misoperation caused by mechanical failure. The primary and secondary fusion pole-mounted circuit breaker supports telemetry, telesignaling, remote control and other functions, and can realize remote monitoring and control. By communicating with the distribution automation master station, the operation and maintenance personnel can monitor the equipment status in real time, perform remote operation and fault processing, and improve the intelligence and automation level of operation and maintenance.

[0027] In some embodiments, please refer to Figure 1 to Figure 2 A pointer slot 61 is provided on the circuit breaker box 1, a connecting pointer 6 is provided on the abutment plate 32, the connecting pointer 6 passes through the pointer slot 61, and a switch opening and closing display panel 62 is provided on the circuit breaker box 1.

[0028] With such arrangement, during the downward pressing process of the abutment plate 32, the connection pointer 6 on the abutment plate 32 is driven to be pressed down in the pointer slot 61, thereby displaying the closing or opening state on the opening and closing display panel. In this way, the pressing action of the connection pointer 6 in the pointer slot 61 directly corresponds to the opening or closing state of the circuit breaker. This mechanical indication method is intuitive and reliable, does not rely on electronic components or power supply, and can work stably in various environments, ensuring that the operation and maintenance personnel can accurately judge the current state of the circuit breaker. Through the indication of the pointer, the operation and maintenance personnel can quickly confirm the opening and closing state of the circuit breaker, thereby avoiding misoperation. Before performing equipment inspection or maintenance, confirming that the circuit breaker is in the opening state can effectively prevent electric shock accidents. This visual status indication greatly improves the safety of operation. Since the movement of the pointer is directly related to the mechanical action of the circuit breaker, this indication method reduces the possibility of misjudgment. Compared with electronic display screens or indicator lights, mechanical pointers are more reliable and are not easily affected by electromagnetic interference or power failures, thereby ensuring the accuracy of the indication information.

[0029] The implementation principle of the primary and secondary fusion column mounted circuit breaker of the embodiment of the present application which can improve the closing efficiency is as follows: when the operator uses the primary and secondary fusion column mounted circuit breaker, in the case of a short circuit, the current rises to ten to one hundred times the normal current within a few milliseconds, the current passes through the static contact 15 to the moving contact 14, and then reaches the lower outlet 54 through the moving contact 14, and then passes around the coil 25 through the connecting soft wire 55 to reach the outlet terminal 53. After the current rises, the current passes through the coil 25 to generate a magnetic field, thereby generating a force to pull the iron cylinder 21 downward, thereby mutually connecting the moving contact 14 and the static contact 15. Separate, the arc extinguishing chamber 13 helps to extinguish the arc generated when the static contact 15 and the moving contact 14 are separated. During the process of pressing the pin 22 down, the pin 22 presses the insulating protective tube 5, thereby pressing the connecting spring 51. At the same time, the insulating protective tube 5 presses the abutting plate 32. The abutting plate 32 pushes the connecting block 42 to rotate on the thread 47 on the fixing column 41, thereby driving the diamond block 31 to rotate and abut against the transmission block 37. The transmission block drives the rotating plate 34 to rotate on the abutting plate 32, thereby driving the energy storage spring 36 on the connecting seat 35 to open, and converting the kinetic energy generated by the electromagnetic into the elasticity of the spring. Potential energy, while the connecting block 42 rotates on the fixed column 41, the inclined surface of the triangular limit block 45 presses the cylinder 43 and the abutment spring 44, and when it reaches the limit groove 46 on the fixed column 41, the abutment spring 44 and the cylinder 43 rebound to help the limit block 45 abut in the limit groove 46, so that the limit block 45 fixes the connecting block 42 to the column 41, and keeps the static contact 15 and the moving contact 14 separated; in the process of detecting that the switch can be closed, the cylinder 43 drives the abutment spring 44 to compress and drive the limit block 45 to retract, and at the same time the energy storage spring 36 retracts and drives the transmission block 3 7 squeezes the diamond block 31 and accelerates the rotation, thereby driving the connection block 42 to rise on the thread 47 on the fixing column 41, driving the connection spring 51 and the insulating protection tube 5 to rise together, and the connection spring 51 assists in driving the insulating protection tube 5 to rise. At the same time, the insulating protection tube 5 drives the pin 22 and the iron cylinder 21 to rise, and the compression spring 23 assists in rising, thereby driving the moving contact 14 and the static contact 15 to combine and complete the closing. When the abutment plate 32 is pressed down, the connection pointer 6 on the abutment plate 32 is driven to press down in the pointer slot 61, so that the closing or opening is displayed on the closing and opening display board.

[0030] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A primary and secondary fusion column mounted circuit breaker that can improve closing efficiency, characterized by: The invention comprises a circuit breaker housing (1), a sealed pole (11), an arc extinguishing chamber (13), a moving contact (14), a stationary contact (15), an electromagnetic spiral assembly (2), a spring energy storage component (3) and a switch-off limiter (4), wherein the sealed pole (11) is arranged on the circuit breaker housing (1), a cavity (12) is provided on the sealed pole (11), the stationary contact (15) is arranged on the sealed pole (11), and the electromagnetic spiral assembly (2) is arranged on the sealed pole The movable contact (14) is arranged on the column (11), the movable contact (14) is arranged on the electromagnetic spiral assembly (2), the electromagnetic spiral assembly (2) is used to separate the movable contact (14) from the static contact (15), the spring energy storage member (3) is arranged on the movable contact (14), and is used to convert kinetic energy into elastic potential energy to store energy for facilitating closing during the opening process, and the opening limit member (4) is arranged on the circuit breaker box (1), and is used to fix the movable contact (14) during the opening process.

2. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 1 is characterized in that: The switch-off limiting member (4) comprises a fixed column (41), a connecting block (42), a cylinder (43), an abutting spring (44) and a limiting block (45); the fixed column (41) is arranged on the circuit breaker housing (1); the connecting block (42) is movably arranged on the fixed column (41); a connecting hole is provided on the connecting block (42); one end of the cylinder (43) is arranged in the connecting hole; the limiting block (45) is provided on the other end of the cylinder (43); the abutting spring (44) is sleeved on the cylinder (43); one end of the abutting spring (44) abuts on the connecting block (42); the other end of the abutting spring (44) abuts on the limiting block (45); and a limiting groove (46) is provided on the fixed column (41).

3. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 2 is characterized in that: The fixing column (41) is provided with a thread (47), and the connecting block (42) is provided with a thread groove (48).

4. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 3 is characterized in that: The spring energy storage member (3) comprises a diamond block (31), an abutment plate (32), a connecting column (33), a rotating plate (34) and a transmission block (37); the diamond block (31) is fixedly arranged on the connecting block (42); the connecting column (33) is rotatably arranged on an end of the connecting block (42) away from the fixed column (41); the abutment plate (32) is arranged on an end of the connecting column (33) away from the connecting block (42); the rotating plate (34) is rotatably arranged on the abutment plate (32); and the transmission block (37) is arranged on the rotating plate (34) and is used for abutting against the diamond block (31) during the rotation of the diamond block (31).

5. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 4 is characterized in that: The rotating plate (34) is also rotatably provided with a connecting seat (35), and an energy storage spring (36) is also provided on the connecting seat (35).

6. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 5, characterized in that: An arc extinguishing chamber (13) is arranged in the sealed pole (11), the electromagnetic spiral assembly (2) is arranged in the arc extinguishing chamber (13), and the moving contact (14) is arranged on the arc extinguishing chamber (13) through the electromagnetic spiral assembly (2).

7. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 6, characterized in that: The electromagnetic spiral assembly (2) comprises an iron cylinder (21), a pin (22), a compression spring (23), a winding (24) and a coil (25); the winding (24) is arranged on the arc extinguishing chamber (13); the coil (25) is arranged on the winding (24); the iron cylinder (21) is arranged on the moving contact (14); the pin (22) is arranged on an end of the iron cylinder (21) away from the moving contact (14); an end of the pin (22) away from the iron cylinder (21) passes through the arc extinguishing chamber (13); the compression spring (23) is sleeved on the pin (22); one end of the compression spring (23) abuts against the iron cylinder (21); and the other end of the compression spring (23) abuts against the arc extinguishing chamber (13).

8. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 7, characterized in that: The stationary contact (15) is provided with an incoming line terminal (52), the moving contact (14) is provided with a lower outgoing line (54), the other end of the lower outgoing line (54) is provided on the winding (24), a connecting soft wire (55) is provided at one end of the winding (24) away from the lower outgoing line (54), and an end of the connecting soft wire (55) away from the winding (24) is connected to an outgoing line terminal (53).

9. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 8, characterized in that: An insulating protective tube (5) is fixedly provided on one end of the pin (22) away from the iron cylinder (21); a connecting spring (51) is provided on one end of the insulating protective tube (5) away from the pin (22); one end of the connecting spring (51) abuts against the insulating protective tube (5); the other end of the connecting spring (51) abuts against the circuit breaker box (1); the insulating protective tube (5) passes through the circuit breaker box (1) and abuts against the abutment plate (32).

10. The primary and secondary fusion column mounted circuit breaker capable of improving closing efficiency according to claim 9, characterized in that: The circuit breaker box (1) is provided with a pointer slot (61), the abutment plate (32) is provided with a connection pointer (6), the connection pointer (6) passes through the pointer slot (61), and the circuit breaker box (1) is provided with an opening and closing display panel (62).

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