An outdoor circuit breaker with closing holding function

Abstract

The application discloses an outdoor circuit breaker with a closing and holding function, and belongs to the field of circuit breakers. The outdoor circuit breaker comprises a holding spring, a vacuum circuit breaking assembly, a driving assembly and a transmission assembly. The vacuum circuit breaking assembly is fixedly arranged on the upper portion of a transmission box. The driving assembly is fixedly arranged on the lower portion of the transmission box. The transmission assembly is arranged in the transmission box and connected with the driving assembly at an input end. An output end of the transmission assembly is hingedly connected with the upper end of a rotating rod. The lower end of the rotating rod is hingedly connected with the middle portion of a holding rod. The lower end of the holding rod is hingedly arranged on the transmission box. The upper end of the holding rod is connected with the transmission box through the holding spring. The lower end of a push-pull rod is hingedly connected with the middle portion of the rotating rod. The upper end of the push-pull rod is hingedly connected with the movable part of the vacuum circuit breaking assembly. The holding spring, the holding rod and the push-pull rod are used in cooperation, so that the movable contact in the vacuum arc extinguishing chamber of the vacuum circuit breaking assembly is in full contact with the fixed contact in the closing state, and the stability of the vacuum arc extinguishing chamber in the power transmission process is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, and in particular to an outdoor circuit breaker with a closing holding function. Background Technology

[0002] Outdoor circuit breakers are crucial equipment in power transmission projects. They are high-voltage switchgear adapted to complex outdoor conditions, capable of withstanding wind, rain, pollution, and temperature differences from -40℃ to 70℃. They are widely used in urban and rural 10kV and above overhead distribution lines. Outdoor circuit breakers incorporate vacuum interrupters for circuit on / off control. The moving contact within the vacuum interrupter is located on the lower side, connected to the on / off drive assembly via an insulating rod. Over time, wear and tear on the moving contact, drive assembly, and insulating rod can prevent sufficient contact between the moving and stationary contacts. This insufficient contact leads to an increase in the temperature of the vacuum interrupter, ultimately causing damage and unstable power transmission. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an outdoor circuit breaker with a closing and holding function.

[0004] The objective of this invention is achieved through the following technical solution: An outdoor circuit breaker with closing and holding function includes a holding spring, a holding rod, a rotating rod, a push-pull rod, a transmission box, a transmission assembly, a vacuum circuit breaker assembly, and a drive assembly. The vacuum circuit breaker assembly is fixedly mounted on the upper part of the transmission box, and the drive assembly is fixedly mounted on the lower part of the transmission box. The transmission assembly is disposed inside the transmission box and its input end is connected to the drive assembly. The output end of the transmission assembly is hinged to the upper end of the rotating rod, and the lower end of the rotating rod is hinged to the middle part of the holding rod. The lower end of the holding rod is hinged to the transmission box, and the upper end of the holding rod is connected to the transmission box via the holding spring. The lower end of the push-pull rod is hinged to the middle part of the rotating rod, and the upper end of the push-pull rod is hinged to the movable part of the vacuum circuit breaker assembly.

[0005] Furthermore, a retaining plate is fixedly installed inside the transmission box, and a sliding rod is slidably installed on the retaining plate. The lower end of the sliding rod is hinged to the upper end of the retaining rod, and a limiting plate is fixedly installed on the upper end of the sliding rod. The retaining spring is sleeved on the sliding rod and its two ends abut against the retaining plate and the limiting plate, respectively.

[0006] Furthermore, the vacuum circuit breaker assembly includes an end conductive terminal, a middle conductive terminal, a vacuum interrupter, an insulating pull rod, a conductive flexible connection plate, and an insulating cylinder component. The insulating cylinder component is sealed and fixedly mounted on the transmission box. The end conductive terminal is sealed and fixedly mounted on the end of the insulating cylinder component. The middle conductive terminal is sealed and fixedly mounted on the middle of the insulating cylinder component. The vacuum interrupter is fixedly mounted inside the insulating cylinder component, and its stationary contact is electrically connected to the end conductive terminal. The moving contact of the vacuum interrupter is electrically connected to the middle conductive terminal through the conductive flexible connection plate. The insulating pull rod is mounted inside the insulating cylinder component, and its upper end is connected to the moving contact. The lower end of the insulating pull rod is hinged to the upper end of the push-pull rod. The transmission box is provided with a push-pull hole that mates with the insulating pull rod.

[0007] Furthermore, the insulating cylinder component includes an upper insulating cylinder, a lower insulating cylinder, a conductive cylinder, a guide rod, and a guide sleeve. The lower insulating cylinder is sealed and fixedly mounted on the transmission box. The conductive cylinder is sealed and coaxially fixedly mounted on the lower insulating cylinder. The middle conductive terminal is sealed and fixedly mounted on the conductive cylinder. The upper insulating cylinder is sealed and fixedly mounted on the middle conductive terminal. The end conductive terminal is sealed and fixedly mounted on the upper end of the upper insulating cylinder. The lower end of the conductive flexible connection plate is fixedly mounted on the inner wall of the conductive cylinder. The guide sleeve is fixedly mounted on the inner wall of the conductive cylinder. The guide rod is slidably mounted inside the guide sleeve. The guide rod connects the moving contact and the insulating pull rod.

[0008] Furthermore, the conductive flexible connection plate includes an upper conductive plate, a lower conductive plate, an upper C-shaped plate, and a lower C-shaped plate. The upper conductive plate is electrically connected to the moving contact, and the lower conductive plate is electrically connected to the conductive cylinder. The lower end of the upper conductive plate and the upper end of the lower conductive plate are electrically connected sequentially through the upper C-shaped plate and the lower C-shaped plate, and the openings of the upper C-shaped plate and the lower C-shaped plate face opposite directions.

[0009] Furthermore, a conductive ring is fitted onto the moving contact, one end of which engages with a limiting protrusion fixedly mounted on the moving contact. A locking nut that engages with the other end of the conductive ring is threaded onto the moving contact. A spring plate is provided between the locking nut and the conductive ring, and a locking pressure plate is provided between the spring plate and the conductive ring. The upper conductive plate is electrically connected to the conductive ring.

[0010] Furthermore, the conductive ring is provided with an anti-detachment groove, and a bending plate that cooperates with the anti-detachment groove is fixedly provided on the end of the upper conductive plate. A bending spring plate is fixedly provided on the conductive ring, and the upper conductive plate is disposed between the bending spring plate and the conductive ring. The fastening screw passes through the bending spring plate and the upper conductive plate in sequence and is threadedly connected to the conductive ring.

[0011] Furthermore, the transmission assembly includes a main swing arm, a first rotating rod, a second rotating rod, a secondary swing arm, a long tie rod, and a power rod. A first fixed shaft and a second fixed shaft, parallel to each other, are fixedly arranged inside the transmission box. The first rotating rod is rotatably mounted on the first fixed shaft. One end of the main swing arm is rotatably mounted on the first fixed shaft and fixedly connected to the first rotating rod. The other end of the main swing arm is connected to the drive assembly. The second rotating rod is rotatably mounted on the second fixed shaft. A first adjusting terminal is hinged to the end of the first rotating rod, and a second adjusting terminal is hinged to the end of the second rotating rod. Both ends of the long tie rod are threadedly connected to the first adjusting terminal and the second adjusting terminal, respectively, and the threads on both ends of the long tie rod have opposite helical directions. One end of the secondary swing arm is rotatably mounted on the second fixed shaft and fixedly connected to the second rotating rod. The other end of the secondary swing arm is hinged to the upper end of the rotating rod via the power rod.

[0012] Furthermore, the drive assembly includes a drive housing and a drive component. The drive component is fixedly disposed inside the drive housing, and the drive housing is fixedly disposed on the transmission housing. The output end of the drive component is hinged to the end of the main swing arm.

[0013] Furthermore, a third adjustment terminal is hinged to the other end of the auxiliary swing arm, and a fourth adjustment terminal is hinged to the upper end of the rotating rod. The two ends of the power rod are threadedly connected to the third adjustment terminal and the fourth adjustment terminal, respectively, and the helical directions of the threads on the two ends of the power rod are opposite.

[0014] The beneficial effects of this invention are: 1) In this technology, the coordinated use of components such as the spring, retaining rod, and push-pull rod ensures that the moving contact in the vacuum interrupter is always in full contact with the stationary contact when the vacuum circuit breaker is closed, effectively guaranteeing the stability of the vacuum interrupter during power transmission.

[0015] 2) In this technology, during the up-and-down movement of the moving contact of the vacuum interrupter, the upper C-shaped plate and the lower C-shaped plate undergo expansion and contraction deformation. This fixed connection method further ensures the stability of the power transmission process.

[0016] 3) In this technology, the bending spring plate has two functions: first, to prevent the upper conductive plate from detaching from the anti-detachment groove; and second, to ensure full electrical connection with the upper conductive plate for conduction. Attached Figure Description

[0017] Figure 1 This is the main view connection structure diagram of the outdoor circuit breaker; Figure 2 for Figure 1Enlarged connection structure diagram at point A; Figure 3 for Figure 1 Enlarged connection structure diagram at point B; Figure 4 for Figure 1 Enlarged connection structure diagram at point C; In the diagram, 1-holding spring, 2-holding rod, 3-rotating rod, 4-push-pull rod, 5-transmission box, 6-holding plate, 7-sliding rod, 8-limiting plate, 9-end conductive terminal, 10-middle conductive terminal, 11-vacuum interrupter, 12-insulating pull rod, 13-conductive flexible connection plate, 14-push-pull hole, 15-upper insulating cylinder, 16-lower insulating cylinder, 17-conductive cylinder, 18-guide rod, 19-guide sleeve, 20-upper conductive plate, 21-lower conductive plate, 22-upper C-shaped plate, 23-lower C-shaped plate, 24-conductive ring, 25-limiting protrusion, 26-locking nut, 27-spring plate, 28-locking pressure plate, 29-anti-disengagement groove, 30-bending plate. 31-Bending spring plate, 32-Fasting screw, 33-Main swing arm, 34-First rotating rod, 35-Second rotating rod, 36-Secondary swing arm, 37-Long pull rod, 38-Power rod, 39-First fixed axis, 40-Second fixed axis, 41-First adjusting terminal, 42-Second adjusting terminal, 43-Drive box, 44-Drive component, 45-Third adjusting terminal, 46-Fourth adjusting terminal. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0019] See Figures 1-4 The present invention provides a technical solution: An outdoor circuit breaker with closing and holding function includes a holding spring 1, a holding rod 2, a rotating rod 3, a push-pull rod 4, a transmission box 5, a transmission assembly, a vacuum circuit breaker assembly, and a drive assembly. The vacuum circuit breaker assembly is fixedly mounted on the upper part of the transmission box 5, and the drive assembly is fixedly mounted on the lower part of the transmission box 5. The transmission assembly is located inside the transmission box 5 and its input end is connected to the drive assembly. The output end of the transmission assembly is hinged to the upper end of the rotating rod 3. The lower end of the rotating rod 3 is hinged to the middle part of the holding rod 2. The lower end of the holding rod 2 is hinged to the transmission box 5. The upper end of the holding rod 2 is connected to the transmission box 5 through the holding spring 1. The lower end of the push-pull rod 4 is hinged to the middle part of the rotating rod 3, and the upper end of the push-pull rod 4 is hinged to the movable part of the vacuum circuit breaker assembly. The transmission box 5 has mounting brackets connected to the ground at both lower ends. One, two, or three sets of vacuum circuit breaker assemblies are mounted on both upper ends of the transmission box 5. The transmission assembly transmits power from the drive assembly to all vacuum circuit breaker assemblies. The vacuum circuit breaker assemblies transmit high-voltage electricity and control the switching on and off of the power transmission process. The drive assembly is fixed to the lower part of the transmission box 5 and provides power for the switching on and off of the vacuum circuit breaker assemblies. The transmission assembly transmits power from the drive assembly to the upper end of the rotating rod 3. The rotating rod 3 rotates around the hinge point at its lower end. The hinged push-pull rod 4 in the middle of the rotating rod 3 drives the vacuum circuit breaker assemblies to work and achieve power switching. The lower end of the holding rod 2 is hinged to the transmission box 5, and the middle part of the holding rod 2 is hinged to the lower end of the rotating rod 3. The upper end of the holding rod 2 is connected to one end of the holding spring 1, and the other end of the holding spring 1 is fixedly connected to the transmission box 5. The holding spring 1 can be a tension spring or a compression spring, and it is vertically positioned. The retaining spring 1 moves the upper end of the retaining rod 2 upwards. When the vacuum circuit breaker assembly is in the closed state, the retaining spring 1 ensures that the moving contact and stationary contact in the vacuum circuit breaker assembly are in full contact, guaranteeing stability during high-voltage power transmission. The retaining spring 1, retaining rod 2, rotating rod 3, push-pull rod 4, and transmission assembly are housed in the transmission box 5 and protected by the transmission box 5.

[0020] In some embodiments, a retaining plate 6 is fixedly installed inside the transmission box 5, and a sliding rod 7 is slidably installed on the retaining plate 6. The lower end of the sliding rod 7 is hinged to the upper end of the retaining rod 2, and a limiting plate 8 is fixedly installed on the upper end of the sliding rod 7. A retaining spring 1 is sleeved on the sliding rod 7, and its two ends abut against the retaining plate 6 and the limiting plate 8, respectively. The retaining plate 6 is horizontally fixed on the inner wall of the transmission box 5, and a through sliding hole is provided in the middle of the retaining plate 6. The sliding rod 7 is slidably installed in the sliding hole, and its lower end is hinged to the upper end of the retaining rod 2. The retaining spring 1 is sleeved on the sliding rod 7, and its upper end is limited by the limiting plate 8. After the vacuum circuit breaker assembly is closed, the retaining spring 1 is always in a compressed state, which better ensures the stability of the vacuum circuit breaker assembly during power transmission.

[0021] In some embodiments, the vacuum circuit breaker assembly includes an end conductive terminal 9, a middle conductive terminal 10, a vacuum interrupter 11, an insulating pull rod 12, a conductive flexible connection plate 13, and an insulating cylinder component. The insulating cylinder component is sealed and fixedly mounted on the transmission box 5. The end conductive terminal 9 is sealed and fixedly mounted on the end of the insulating cylinder component. The middle conductive terminal 10 is sealed and fixedly mounted on the middle of the insulating cylinder component. The vacuum interrupter 11 is fixedly mounted inside the insulating cylinder component, and its stationary contact is electrically connected to the end conductive terminal 9. The moving contact of the vacuum interrupter 11 is electrically connected to the middle conductive terminal 10 through the conductive flexible connection plate 13. The insulating pull rod 12 is mounted inside the insulating cylinder component, and its upper end is connected to the moving contact. The lower end of the insulating pull rod 12 is hinged to the upper end of the push-pull rod 4. The transmission box 5 is provided with a push-pull hole 14 that cooperates with the insulating pull rod 12. Among them, the conductive flexible connection plate 13, the end conductive terminal 9, and the middle conductive terminal 10 are all conductive materials in the prior art. The end conductive terminal 9 and the middle conductive terminal 10 are respectively connected to the two ends of the high-voltage transmission line. The end conductive terminal 9 and the middle conductive terminal 10 are both sealed and fixed on the insulating cylinder component. The vacuum interrupter 11 is a device in the prior art and is sealed and fixed inside the insulating cylinder component. The stationary contact of the vacuum interrupter 11 is electrically connected to the end conductive terminal 9. The upper end of the conductive flexible connection plate 13 is electrically connected and fixed to the moving contact of the vacuum interrupter 11, and the lower end of the conductive flexible connection plate 13 is electrically connected and fixed to the middle conductive terminal 10. The insulating pull rod 12 is an insulating push-pull rod in the prior art. The upper end of the insulating pull rod 12 is connected to the stationary contact, and the lower end of the insulating pull rod 12 is hinged to the upper end of the push-pull rod 4. A guide sleeve is provided in the push-pull hole 14 on the transmission box 5. The lower end of the insulating pull rod 12 is slidably set in the guide sleeve, so that the insulating pull rod 12 can only move up and down in the guide sleeve and cannot swing.

[0022] In some embodiments, the insulating cylinder component includes an upper insulating cylinder 15, a lower insulating cylinder 16, a conductive cylinder 17, a guide rod 18, and a guide sleeve 19. The lower insulating cylinder 16 is sealed and fixedly mounted on the transmission box 5. The conductive cylinder 17 is sealed and coaxially fixedly mounted on the lower insulating cylinder 16. The middle conductive terminal 10 is sealed and fixedly mounted on the conductive cylinder 17. The upper insulating cylinder 15 is sealed and fixedly mounted on the middle conductive terminal 10. The end conductive terminal 9 is sealed and fixedly mounted on the upper end of the upper insulating cylinder 15. The lower end of the conductive flexible connection plate 13 is fixedly mounted on the inner wall of the conductive cylinder 17. The guide sleeve 19 is fixedly mounted on the inner wall of the conductive cylinder 17. The guide rod 18 is slidably mounted inside the guide sleeve 19. The guide rod 18 is connected between the moving contact and the insulating pull rod 12. The upper insulating cylinder 15, lower insulating cylinder 16, conductive cylinder 17, guide rod 18, and guide sleeve 19 are all coaxially arranged. The vacuum interrupter 11 is sealed inside the upper insulating cylinder 15. A sealing ring is provided between the end conductive terminal 9 and the upper end of the upper insulating cylinder 15, between the lower end of the upper insulating cylinder 15 and the middle conductive terminal 10, between the upper end of the conductive cylinder 17 and the middle conductive terminal 10, between the lower end of the conductive cylinder 17 and the upper end of the lower insulating cylinder 16, and between the lower end of the lower insulating cylinder 16 and the transmission box 5. The multiple sets of sealing rings effectively prevent rainwater from entering the interior of the insulating cylinder components, thus preventing leakage. The guide sleeve 19 guides the movement of the guide rod 18. The upper end of the guide rod 18 is threaded to the end of the stationary contact, or it can be hinged. The lower end of the guide rod 18 is threaded to the upper end of the insulating pull rod 12, or it can be hinged. The conductive cylinder 17 is used to fix and install the conductive flexible connection plate 13 and the guide sleeve 19. The conductive flexible connection plate 13 is disposed on the inner wall of the conductive cylinder 17, and the guide sleeve 19 is disposed on the inner wall of the conductive flexible connection plate 13. The guide sleeve 19 and the conductive flexible connection plate 13 are fixed to the inner wall of the conductive cylinder 17 by multiple sets of bolts. The moving contact is electrically connected to the central conductive terminal 10 through the conductive flexible connection plate 13 and the conductive cylinder 17.

[0023] In some embodiments, the conductive flexible connection plate 13 includes an upper conductive plate 20, a lower conductive plate 21, an upper C-shaped plate 22, and a lower C-shaped plate 23. The upper conductive plate 20 is electrically connected to the moving contact, and the lower conductive plate 21 is electrically connected to the conductive cylinder 17. The lower end of the upper conductive plate 20 and the upper end of the lower conductive plate 21 are electrically connected sequentially through the upper C-shaped plate 22 and the lower C-shaped plate 23, and the openings of the upper C-shaped plate 22 and the lower C-shaped plate 23 face opposite directions. The conductive flexible connection plate 13 is composed of four sections: the upper conductive plate 20, the lower conductive plate 21, the upper C-shaped plate 22, and the lower C-shaped plate 23. The upper conductive plate 20 and the lower conductive plate 21 both serve as a fixed connection. The upper C-shaped plate 22 and the lower C-shaped plate 23 work together to achieve expansion and contraction deformation. During the up-and-down movement of the moving contact of the vacuum interrupter 11, the upper C-shaped plate 22 and the lower C-shaped plate 23 expand and contract. This fixed connection method further ensures the stability of the power transmission process.

[0024] In some embodiments, a conductive ring 24 is sleeved on the moving contact. One end of the conductive ring 24 engages with a limiting protrusion 25 fixedly disposed on the moving contact. A locking nut 26 is threadedly connected to the moving contact and engages with the other end of the conductive ring 24. A spring plate 27 is disposed between the locking nut 26 and the conductive ring 24. A locking pressure plate 28 is disposed between the spring plate 27 and the conductive ring 24. The upper conductive plate 20 is electrically connected to the conductive ring 24. The conductive ring 24 is used to mount the conductive plate 20 and ensure full contact with the moving contact. To save costs and facilitate subsequent equipment maintenance, the moving contact and the conductive ring 24 are detachably connected. A limiting protrusion 25 limits the upper end of the conductive ring 24, which is then fixed by a locking nut 26. A spring plate 27 prevents the locking nut 26 from loosening elastically. The locking pressure plate 28 prevents the spring plate 27 from directly pressing on the conductive ring 24, and as a conductor, it also ensures full electrical contact between the moving contact and the conductive ring 24. Alternatively, the moving contact and the conductive ring 24 can be directly fixed together by welding.

[0025] In some embodiments, the conductive ring 24 is provided with an anti-detachment groove 29, and a bent plate 30 that mates with the anti-detachment groove 29 is fixedly provided on the end of the upper conductive plate 20. A bent spring plate 31 is fixedly provided on the conductive ring 24, and the upper conductive plate 20 is disposed between the bent spring plate 31 and the conductive ring 24. A fastening screw 32 passes through the bent spring plate 31 and the upper conductive plate 20 in sequence and is threadedly connected to the conductive ring 24. The anti-detachment groove 29 on the conductive ring 24 is used to install the upper conductive plate 20 and prevent the upper conductive plate 20 from loosening during the movement of the moving contact. The bent spring plate 31 is a conductive metal plate and has two functions: first, to prevent the upper conductive plate 20 from detaching from the anti-detachment groove 29; and second, to ensure sufficient electrical connection with the upper conductive plate 20 for conduction. The fastening screw 32 is used to fix the bent spring plate 31 and the upper conductive plate 20 to the conductive ring 24.

[0026] In some embodiments, the transmission assembly includes a main swing arm 33, a first rotating rod 34, a second rotating rod 35, a secondary swing arm 36, a long pull rod 37, and a power rod 38. A first fixed shaft 39 and a second fixed shaft 40, which are parallel to each other, are fixedly arranged inside the transmission box 5. The first rotating rod 34 is rotatably arranged on the first fixed shaft 39. One end of the main swing arm 33 is rotatably arranged on the first fixed shaft 39 and fixedly connected to the first rotating rod 34. The other end of the main swing arm 33 is connected to the drive assembly. The second rotating rod 35 is rotatably arranged on the second fixed shaft 40. A first adjusting terminal 41 is hinged to the end of the first rotating rod 34. A second adjusting terminal 42 is hinged to the end of the second rotating rod 35. The two ends of the long pull rod 37 are threadedly connected to the first adjusting terminal 41 and the second adjusting terminal 42, respectively, and the helical directions of the threads on the two ends of the long pull rod 37 are opposite. One end of the secondary swing arm 36 is rotatably arranged on the second fixed shaft 40 and fixedly connected to the second rotating rod 35. The other end of the secondary swing arm 36 is hinged to the upper end of the rotating rod 3 through the power rod 38. The first fixed shaft 39 and the second fixed shaft 40 serve to hinge the first rotating rod 34 and the second rotating rod 35 to the inner wall of the transmission box 5. First adjusting terminals 41 are hinged to both ends of the first rotating rod 34, and second adjusting terminals 42 are hinged to both ends of the second rotating rod 35. Two sets of parallel long pull rods 37 are positioned between the two first adjusting terminals 41 and the two second adjusting terminals 42. The drive assembly drives the main swing arm 33 to rotate around the first fixed shaft 39. The main swing arm 33 drives the first rotating rod 34 to rotate around the first fixed shaft 39. The first rotating rod 34, after passing through the first adjusting terminal 41, the long pull rods 37, and the second adjusting terminal 42, drives the second rotating rod 35 to rotate around the second fixed shaft 40. The second rotating rod 35 drives the auxiliary swing arm 36 to rotate around the second fixed shaft 40. The auxiliary swing arm 36 drives the rotating rod 3 to rotate via the power rod 38.

[0027] In some embodiments, the drive assembly includes a drive housing 43 and a drive component 44. The drive component 44 is fixedly disposed within the drive housing 43, and the drive housing 43 is fixedly disposed on the transmission housing 5. The output end of the drive component 44 is hinged to the end of the main swing arm 33. The drive component 44 is a prior art device, which drives the main swing arm 33 to rotate. The drive housing 43 is fixed on the transmission housing 5 to mount the drive component 44.

[0028] In some embodiments, a third adjustment terminal 45 is hinged to the other end of the auxiliary swing arm 36, and a fourth adjustment terminal 46 is hinged to the upper end of the rotating rod 3. The two ends of the power rod 38 are threadedly connected to the third adjustment terminal 45 and the fourth adjustment terminal 46, respectively, with the threads on the two ends of the power rod 38 having opposite helical directions. The third adjustment terminal 45 and the fourth adjustment terminal 46 facilitate the rotation adjustment of the rotating rod 3. Rotation of the rotating rod 3 adjusts the distance between the auxiliary swing arm 36 and the rotating rod 3, thereby better ensuring the conductivity of the vacuum interrupter 11 in the closed state.

[0029] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An outdoor circuit breaker with closing and holding function, characterized in that: The assembly includes a retaining spring (1), a retaining rod (2), a rotating rod (3), a push-pull rod (4), a transmission box (5), a transmission assembly, a vacuum circuit breaker assembly, and a drive assembly. The vacuum circuit breaker assembly is fixedly mounted on the upper part of the transmission box (5), and the drive assembly is fixedly mounted on the lower part of the transmission box (5). The transmission assembly is located inside the transmission box (5) and its input end is connected to the drive assembly. The output end of the transmission assembly is hinged to the upper end of the rotating rod (3). The lower end of the rotating rod (3) is hinged to the middle part of the retaining rod (2). The lower end of the retaining rod (2) is hinged to the transmission box (5). The upper end of the retaining rod (2) is connected to the transmission box (5) through the retaining spring (1). The lower end of the push-pull rod (4) is hinged to the middle part of the rotating rod (3), and the upper end of the push-pull rod (4) is hinged to the movable part of the vacuum circuit breaker assembly. The vacuum circuit breaker assembly includes an end conductive terminal (9), a middle conductive terminal (10), a vacuum interrupter (11), an insulating pull rod (12), a conductive flexible connection plate (13), and an insulating cylinder component. The insulating cylinder component is sealed and fixedly mounted on the transmission box (5). The end conductive terminal (9) is sealed and fixedly mounted on the end of the insulating cylinder component. The middle conductive terminal (10) is sealed and fixedly mounted on the middle of the insulating cylinder component. The vacuum interrupter (11) is fixedly mounted inside the insulating cylinder component, and its stationary contact is electrically connected to the end conductive terminal (9). The moving contact of the vacuum interrupter (11) is electrically connected to the middle conductive terminal (10) through the conductive flexible connection plate (13). The insulating pull rod (12) is mounted inside the insulating cylinder component, and its upper end is connected to the moving contact. The lower end of the insulating pull rod (12) is hinged to the upper end of the push-pull rod (4). The transmission box (5) is provided with a push-pull hole (14) that cooperates with the insulating pull rod (12). The insulating cylinder component includes an upper insulating cylinder (15), a lower insulating cylinder (16), a conductive cylinder (17), a guide rod (18), and a guide sleeve (19). The lower insulating cylinder (16) is sealed and fixedly mounted on the transmission box (5). The conductive cylinder (17) is sealed and coaxially fixedly mounted on the lower insulating cylinder (16). The middle conductive terminal (10) is sealed and fixedly mounted on the conductive cylinder (17). The upper insulating cylinder (15) is sealed and fixedly mounted on the middle conductive terminal (10). The end conductive terminal (9) is sealed and fixedly mounted on the upper end of the upper insulating cylinder (15). The lower end of the conductive flexible connection plate (13) is fixedly mounted on the inner wall of the conductive cylinder (17). The guide sleeve (19) is fixedly mounted on the inner wall of the conductive cylinder (17). The guide rod (18) is slidably mounted inside the guide sleeve (19). The guide rod (18) is connected between the moving contact and the insulating pull rod (12). The conductive flexible connection plate (13) includes an upper conductive plate (20), a lower conductive plate (21), an upper C-shaped plate (22), and a lower C-shaped plate (23). The upper conductive plate (20) is electrically connected to the moving contact, and the lower conductive plate (21) is electrically connected to the conductive cylinder (17). The lower end of the upper conductive plate (20) and the upper end of the lower conductive plate (21) are electrically connected in sequence through the upper C-shaped plate (22) and the lower C-shaped plate (23). The openings of the upper C-shaped plate (22) and the lower C-shaped plate (23) face opposite directions. A conductive ring (24) is fitted on the moving contact. One end of the conductive ring (24) is engaged with a limiting protrusion (25) fixedly installed on the moving contact. A locking nut (26) is threaded onto the moving contact and engages with the other end of the conductive ring (24). A spring plate (27) is provided between the locking nut (26) and the conductive ring (24). A locking pressure plate (28) is provided between the spring plate (27) and the conductive ring (24). The upper conductive plate (20) is electrically connected to the conductive ring (24). The conductive ring (24) is provided with an anti-detachment groove (29), and a bending plate (30) that cooperates with the anti-detachment groove (29) is fixedly provided on the end of the upper conductive plate (20). A bending spring plate (31) is fixedly provided on the conductive ring (24). The upper conductive plate (20) is located between the bending spring plate (31) and the conductive ring (24). The fastening screw (32) passes through the bending spring plate (31) and the upper conductive plate (20) in sequence and is threadedly connected to the conductive ring (24).

2. An outdoor circuit breaker with closing and holding function according to claim 1, characterized in that: A retaining plate (6) is fixedly installed inside the transmission box (5). A sliding rod (7) is slidably installed on the retaining plate (6). The lower end of the sliding rod (7) is hinged to the upper end of the retaining rod (2). A limiting plate (8) is fixedly installed on the upper end of the sliding rod (7). The retaining spring (1) is sleeved on the sliding rod (7) and its two ends are respectively pressed against the retaining plate (6) and the limiting plate (8).

3. An outdoor circuit breaker with closing and holding function according to claim 1 or 2, characterized in that: The transmission assembly includes a main swing arm (33), a first rotating rod (34), a second rotating rod (35), a secondary swing arm (36), a long pull rod (37), and a power rod (38). A first fixed shaft (39) and a second fixed shaft (40) are fixedly arranged parallel to each other inside the transmission box (5). The first rotating rod (34) is rotatably mounted on the first fixed shaft (39). One end of the main swing arm (33) is rotatably mounted on the first fixed shaft (39) and fixedly connected to the first rotating rod (34). The other end of the main swing arm (33) is connected to the drive assembly. The second rotating rod (35) is rotatably mounted on the second fixed shaft (40). On the first rotating rod (34), a first adjusting terminal (41) is hinged to the end of the first rotating rod (35), and a second adjusting terminal (42) is hinged to the end of the second rotating rod (35). The two ends of the long pull rod (37) are threaded to the first adjusting terminal (41) and the second adjusting terminal (42) respectively, and the spiral directions of the threads on the two ends of the long pull rod (37) are opposite. One end of the auxiliary swing arm (36) is rotatably mounted on the second fixed shaft (40) and fixedly connected to the second rotating rod (35). The other end of the auxiliary swing arm (36) is hinged to the upper end of the rotating rod (3) through the power rod (38).

4. An outdoor circuit breaker with closing and holding function according to claim 3, characterized in that: The drive assembly includes a drive box (43) and a drive component (44). The drive component (44) is fixedly disposed inside the drive box (43). The drive box (43) is fixedly disposed on the transmission box (5). The output end of the drive component (44) is hinged to the end of the main swing arm (33).

5. An outdoor circuit breaker with closing and holding function according to claim 3, characterized in that: The other end of the auxiliary swing arm (36) is hinged to a third adjustment terminal (45), and the upper end of the rotating rod (3) is hinged to a fourth adjustment terminal (46). The two ends of the power rod (38) are threaded to the third adjustment terminal (45) and the fourth adjustment terminal (46) respectively, and the spiral directions of the threads on the two ends of the power rod (38) are opposite.

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