A primary and secondary fusion built-in isolation knife circuit breaker

Abstract

The application relates to a primary-secondary fusion built-in isolation knife circuit breaker, which comprises a box body arranged on one side of a pole-mounted circuit breaker, a box cover which is detachably buckled and installed at the top opening of the box body, an isolation knife switch unit arranged in the box body, an electrical connection device arranged on the outer wall of the box body and electrically connected with the isolation knife switch unit, and the electrical connection device being electrically connected with the pole-mounted circuit breaker; a control mechanism is arranged on the front face of the box body, and the control mechanism is used for controlling the opening and closing states of the isolation knife switch unit; when the control mechanism drives the isolation knife switch unit to be in the closed state, the isolation knife switch unit is rotated to be in plug-in conduction with the corresponding static contact; when the control mechanism drives the isolation knife switch unit to be in the open state, the isolation knife switch unit is rotated to the opposite direction to be in plug-in conduction with the corresponding safety device, and reliable isolation is completed; the safety device is connected with a grounding bolt arranged on the side of the box body; and the application has the advantages of reasonable structure, good protection effect, stable and reliable opening and closing operation and guaranteed electrical isolation.

Description

Technical Field

[0001] This invention belongs to the technical field of integrated primary and secondary power distribution equipment for power distribution networks, and specifically relates to an integrated primary and secondary power distribution equipment with built-in isolating switch circuit breaker. Background Technology

[0002] In recent years, the State Grid Corporation of China has continuously improved the standardization and intelligent construction requirements of power distribution equipment. Pole-mounted circuit breakers, with their significant advantages such as compact structure, convenient installation, and simple maintenance, have become the core mainstream equipment in medium-voltage power distribution networks and have been explicitly included in the future key technology roadmap for promotion. However, current mainstream pole-mounted circuit breakers still have three major shortcomings in the design and operation of disconnecting switches, seriously restricting equipment reliability and power supply security: First, the disconnecting switches are exposed to the outdoors and have poor environmental tolerance: the existing equipment generally adopts a design scheme in which the disconnecting switches are directly exposed to the external environment, lacking an effective protective structure. During long-term operation, the disconnecting switches are easily corroded by environmental factors such as rain, snow, moisture, salt spray and dust, which can cause oxidation, corrosion or even severe jamming of the contacts, making it impossible to complete the normal opening and closing action. This will not only significantly reduce the electrical performance of the equipment and shorten its service life, but may also cause sudden equipment failures, directly threatening the power supply safety of the distribution network. II. The lateral translation operating mechanism has multiple inherent defects: The existing disconnecting switch adopts a lateral translation opening and closing structure, which has three major problems: ① During the lateral translation process, problems such as mechanism jamming and knife switch misalignment are prone to occur, resulting in the inability of the moving and stationary contacts to accurately connect; ② The lateral translation mechanism requires a larger lateral operating space, which increases the overall installation volume of the equipment; ③ The reset relies on the spring mechanism. With the increase of service life, the spring will undergo irreversible fatigue aging, and the elasticity will gradually decrease. This will not only cause the knife switch reset speed to be slower or not in place, but also generate additional load on the lateral translation drive mechanism, ultimately causing the opening and closing operation to fail. Third, the disconnector lacks reliable positioning after opening, resulting in insufficient electrical isolation safety: When the existing disconnector is opened, it only forms a mechanical isolation gap by driving the disconnector to separate from the stationary contact. After separation, the disconnector is in a suspended state without a dedicated limit or safety device. When encountering severe weather such as strong winds or icing, or when the equipment experiences abnormal vibration, the isolation gap may change and fail to meet the rated safety distance requirements. At this time, discharge sparks are easily generated between the moving and stationary contacts, resulting in incomplete power outage of the primary circuit, which in turn aggravates contact oxidation and erosion, forming a vicious cycle and significantly increasing the safety risk of equipment operation. Therefore, it is necessary to provide a primary and secondary integrated built-in disconnector circuit breaker with a reasonable structure, good protection effect, stable and reliable opening and closing operation, and guaranteed electrical isolation. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a primary and secondary integrated built-in isolating circuit breaker with reasonable structure, good protection effect, stable and reliable opening and closing operation, and guaranteed electrical isolation.

[0004] The objective of this invention is achieved as follows: A primary and secondary integrated built-in isolating switch circuit breaker includes a housing located on one side of a pole-mounted circuit breaker. A detachable, snap-fit ​​cover is installed at the top opening of the housing. An isolating switch unit is located inside the housing and is electrically connected to an electrical connection device located on the outer wall of the housing. This electrical connection device is electrically connected to the pole-mounted circuit breaker. A control mechanism is installed at the front of the housing. This control mechanism controls the opening and closing states of the isolating switch unit. When the control mechanism drives the isolating switch unit to the closed state, it rotates to engage with the corresponding stationary contact for conduction. When the control mechanism drives the isolating switch unit to the open state, it rotates in the opposite direction to engage with the corresponding safety device for conduction, thus achieving reliable isolation. The safety device is connected to a grounding bolt located on the side of the housing.

[0005] In this invention, the isolating switch unit is integrated inside the enclosure. The isolating switch unit is connected to the pole-mounted circuit breaker as a whole structure through the connection device located on the outer wall of the enclosure. This optimizes the overall electrical connection point position, avoids the problem of too many and messy connection parts, and also reduces the contact between electrical connection parts and the external environment. It effectively isolates the erosion of outdoor environmental factors such as wind, rain, dust, and corrosive gases, ensuring operational stability.

[0006] Multiple locking assemblies are provided on the periphery of the enclosure. Each locking assembly includes a top cover lock plate fixed to the outer wall of the enclosure. A top cover lock U-shaped component is movably installed on the top cover lock plate. A top cover locking adjustment screw is rotatably connected to the middle of the top cover lock U-shaped component. A top cover locking nut pull ring is threadedly installed at the upper threaded end of the top cover locking adjustment screw.

[0007] The opening and closing lid includes an upper cover, on the top surface of which are provided multiple U-shaped handles. The inner side of the upper cover corresponding to the box body is provided with a top cover sealing and fastening frame that matches the edge of the top opening of the box body. The top cover sealing and fastening frame and the top wall of the box body are reliably sealed and connected by a rubber sealing strip. The outer side of the upper cover is provided with a locking hook plate that cooperates with the top cover locking nut pull ring to realize quick locking of the box body and the opening and closing lid.

[0008] In this invention, when inspection and maintenance are required, the opening and closing box cover can be quickly opened for operation. The overall size of the opening and closing box cover is larger than the size of the box body, so that the box body is located within the lower protection range of the opening and closing box cover. The size of the top cover sealing buckle frame matches the top of the box body, allowing the two to fit and lock well, and a sealing connection is achieved through a rubber sealing strip. After the work is completed, the top cover sealing buckle frame of the opening and closing box cover is aligned with the top of the box body, and then the opening and closing box body is fastened onto the box body. The top cover lock U-shaped piece is rotated upwards, and the top cover lock U-shaped piece... The top cover locking nut pull ring is in a relaxed state, which drives it to move upward, so that the top cover locking nut pull ring hooks into the locking hook plate (i.e., the locking hook plate just falls into the inside of the top cover locking nut pull ring). Then, the top cover lock U-shaped part is rotated downward to restore its original position, and the top cover locking nut pull ring will correspondingly pull the locking hook plate downward, thereby making the box body and the opening and closing box cover tightly connected. The preload force of the connection between the box body and the opening and closing box cover can also be adjusted according to actual needs by adjusting the relative position of the top cover locking nut pull ring on the top cover locking adjustment screw.

[0009] The control mechanism includes a fixed plate installed in front of the housing, a U-shaped component fixed in front of the fixed plate, a control handle inside the U-shaped component, a main shaft installed inside the control handle, and a safety isolation insulator fitted on the outside of the main shaft. One end of the main shaft passes through the control handle and is connected to the shaft of the U-shaped component, and the other end is connected to the isolating switch unit. The isolating switches of the isolating switch unit are synchronously linked by a coupling rod.

[0010] In this invention, the end of the control handle that extends into the U-shaped component is connected to the main shaft, while the end that extends out of the U-shaped component is the manual control end. The length of one side of the U-shaped component that fits against the outer wall of the housing is shorter than the length of the other side, and an arc-shaped groove is formed on its longer side. The curvature of the arc-shaped groove matches the rotation trajectory of the control handle, and a pointer is provided on the control handle located inside the arc-shaped groove. The two ends of the arc-shaped groove are marked with the words "Open" and "Close" to indicate the opening and closing status in conjunction with the pointer. A safety isolating insulator is used to ensure safety during operation. The main shaft is connected to one of the isolating switch devices in the isolating switch unit, and the isolating switch devices are connected by two couplings. The couplings are powered to each other and to the main shaft to achieve synchronous movement of the isolating switch units. Of course, in actual use, to further improve efficiency, the control handle can be replaced with an electric control component such as a rotary motor to drive the movement of the main shaft, thereby realizing the opening and closing operation of the isolating switch unit.

[0011] Said isolating switch unit is a downward-rotating isolating switch mechanism, said downward-rotating isolating switch mechanism comprises a plurality of groups of isolating switch assemblies with the same structure, each of said isolating switch assemblies comprises a bottom plate with a convex-shaped structure, a first post insulator and a second post insulator are respectively installed at both ends of the upper part of said bottom plate, an installation bent plate is arranged at the top of each said first post insulator, a guide contact bushing is arranged on the side wall of said installation bent plate, a guide positioning plate capable of rotating downward relative to the central axis of the main shaft is arranged behind each said guide contact bushing, and an isolating blade is arranged inside said guide positioning plate.

[0012] A T-shaped plate is arranged at the top of each said second post insulator, a static contact is arranged below one end of said T-shaped plate, one end of said isolating blade is inserted into the U-shaped opening at the lower part of the guide contact bushing, and the other end is in inserted conduction fit with the static contact in the closed state, one end of said isolating blade close to the guide contact bushing is connected to the installation bent plate through a grounding cable; the isolating switch assemblies are connected through a coupling rod.

[0013] In the present invention, during switching on, the control mechanism drives the isolating blade to rotate upward, so that one end of the isolating blade is inserted into the corresponding static contact to realize plug-in conduction and complete the switching-on operation; during switching off, the control mechanism moves in the reverse direction to drive the isolating blade to rotate downward, so that one end of the isolating blade is inserted into the corresponding lower safety positioning assembly to realize reliable isolation from the static contact and complete the switching-off operation.

[0014] Said safety device is a lower safety positioning assembly located inside the rectangular opening of the bottom plate, said lower safety positioning assembly has the same structure as the static contact and is vertically symmetrical to the static contact, it comprises an arc-shaped plate, a positioning seat is installed on the upper part of said arc-shaped plate, a set of bending guide parts are symmetrically arranged at the insertion opening on the upper part of said positioning seat for the isolating blade to insert, a positioning spring is installed between each said bending guide part and the inner wall of the positioning seat, so that the isolating blade is inserted and conducted with the corresponding lower safety positioning assembly in the switching-off state, the lower safety positioning assemblies are connected through a U-shaped connecting sheet located on the side wall of the arc-shaped plate, and said U-shaped connecting sheet is connected to a grounding bolt through a main grounding plate.

[0015] In the present invention, when the lower safety positioning assembly is used for switching-off operation, it can ensure that the isolating blade in a suspended state can be stably and quickly matched therewith and realize reliable grounding. On one hand, it can ensure the safety during operation; on the other hand, the arrangement of a special limiting fixing device or safety device for the isolating blade enables the disconnected switch to maintain a stable mechanical isolation gap at all times without being affected by external factors.

[0016] The isolating switch unit is an upward rotating isolating switch mechanism. The upward rotating isolating switch mechanism includes a base, on which multiple sets of first and second supporting insulators are symmetrically arranged on the left and right sides. An L-shaped plate is provided on the top of the first supporting insulator, and a hinge seat is installed on the inner side of the L-shaped plate. A straight plate is provided on the top of the second supporting insulator, and a stationary contact plate is provided on the straight plate. The first and second supporting insulators are connected by an isolating switch assembly, and the isolating switch assembly uses a control component to realize the opening and closing operation.

[0017] The isolating switch assembly includes an isolating switch body. One end of the isolating switch body is movably hinged to a hinge seat via a spring shaft pin, and the other end is dynamically connected and disconnected via a moving contact rod and a stationary contact plate. A connecting rod is installed in the middle. The control assembly includes a drive shaft that passes through the base. A linkage plate is installed on the outside of the drive shaft corresponding to the isolating switch body. A top rod is movably connected to the upper part of the linkage plate. The upper end of the top rod is connected to the connecting rod. Right-angle notch positioners are fitted on both ends of the drive shaft that extend out of the base. A limit rod is engaged at the lower part of each right-angle notch positioner. The limit rod is fixed to the base by a set of mounting seats, and one end of the limit rod is pressed against a top plate.

[0018] In this invention, when closing the circuit breaker, the control mechanism drives the isolating switch assembly to rotate downward through the control component, so that the moving contact rod at one end of the isolating switch assembly can be inserted and engaged with the corresponding stationary contact plate to achieve connection and complete the closing operation; when opening the circuit breaker, the control mechanism drives the isolating switch assembly to rotate upward through the reverse movement of the control component, so that the moving contact rod at one end of the isolating switch assembly can be inserted into the corresponding safety upper positioning component to achieve reliable isolation from the stationary contact plate and complete the opening operation.

[0019] The safety device is a limiting and fixing assembly, which includes multiple uprights fixed on a base. The tops of a group of uprights on the left and right are connected by a horizontally arranged plate. The multiple horizontal plates are connected by a connecting plate. A safety upper positioning component with the same structure as the stationary contact is provided in the middle of the horizontal plate corresponding to the upward rotation trajectory of the isolating switch assembly. The safety upper positioning components are connected by a U-shaped connecting piece. During the closing process, the control component rotates the isolating switch assembly downward and pushes it against the stationary contact plate, so that the moving contact rod is in close contact with the stationary contact plate. During the opening process, the control component reverses the action, rotating the isolating switch assembly upward and pushing it against the safety upper positioning component, so that the moving contact rod is in close contact with the safety upper positioning component.

[0020] In this invention, the safety positioning component is used to ensure that the isolating switch assembly in the suspended state can stably and quickly cooperate with it during the opening operation and achieve reliable grounding. On the one hand, it can ensure the safety during operation, and on the other hand, it is equipped with a dedicated limit fixing device or safety device for the isolating switch assembly, so that the isolating switch assembly after separation can always maintain a stable mechanical isolation gap and is not affected by external factors.

[0021] The beneficial effects of this invention are as follows: This invention is a primary and secondary integrated built-in isolating switch circuit breaker. In use, this invention integrates the isolating switch unit inside the enclosure. The isolating switch unit is electrically connected to the pole-mounted circuit breaker via an electrical connection device. This not only facilitates connection but also reduces the contact between the electrical connection parts and the external environment, effectively isolating them from outdoor wind, rain, dust, corrosive gases, and other environmental factors, ensuring operational stability. This invention employs a rotating docking isolating switch mechanism. The rotating docking method eliminates the problems of jamming and switch misalignment that are unavoidable with lateral translation, achieving rapid and accurate docking of moving and stationary contacts. Moreover, the rotating docking method achieves the docking operation of moving and stationary contacts simply by swinging a certain amplitude, without... This invention requires a larger lateral operating space, significantly reducing the overall installation volume of the equipment. Furthermore, it eliminates the need for a spring reset mechanism, effectively preventing spring fatigue and aging that could slow down or cause the switch to fail to reset properly, or even create additional load on the switch's lateral movement, ultimately leading to operation failure. The invention employs upper or lower safety devices to reliably position the switch after it has been opened, ensuring electrical isolation safety. Even in severe weather conditions such as strong winds or icing, or when the equipment experiences abnormal vibrations, the isolation gap meets the rated safety distance requirements, greatly improving the equipment's operational safety. This invention boasts advantages such as a reasonable structure, good protection, stable and reliable operation, and guaranteed electrical isolation. Attached Figure Description

[0022] Figure 1 This is a front view of the present invention.

[0023] Figure 2 This is a schematic diagram of the opening and closing box lid of the present invention.

[0024] Figure 3 This is a schematic diagram of the down-turning isolating switch mechanism in the first embodiment of the isolating switch unit of the present invention.

[0025] Figure 4 For the present invention Figure 3 A partial structural diagram.

[0026] Figure 5 This is a schematic diagram of the upper-turn isolation switch mechanism in the second embodiment of the isolation switch unit of the present invention.

[0027] Figure 6This is an exploded view of the upward-turning isolating switch mechanism of the present invention.

[0028] Figure 7 This is a schematic diagram of the structure of the safety positioning component of the present invention.

[0029] In the diagram: 1. Box body; 11. Locking assembly; 101. Top cover lock plate; 102. Top cover lock U-shaped part; 103. Top cover locking adjustment screw; 104. Top cover locking nut pull ring; 2. Opening and closing box cover; 21. Top cover; 22. U-shaped handle; 23. Top cover sealing buckle frame; 24. Rubber sealing strip; 25. Lock hook plate; 3. Control mechanism; 31. Fixing plate; 32. U-shaped part; 33. Control handle; 34. Main shaft; 35. Safety isolating insulator; 36. Coupling rod; 4. Lower rotating isolating switch mechanism; 401. Isolating switch assembly; 41. Base plate; 42. First post insulator; 43. Second post insulator; 44. Mounting bend plate; 45. Guide contact bushing; 46. Guide positioning plate; 47. Isolating blade; 48. Grounding cable; 49. T-shaped plate; 410. Static contact; 402. Safety lower positioning assembly; 421. Arc plate 422, positioning seat 423, bending guide part 424, positioning spring 425, U-shaped connecting piece 403, main grounding plate 5, grounding bolt 6, electrical connection device 7, upper rotating isolating switch mechanism 71, base 72, first support insulator 721, L-shaped plate 722, hinge seat 73, second support insulator 731, straight plate 732, stationary contact plate 74, isolating switch assembly 741, isolating switch body 742, spring shaft pin rod 743, moving contact rod 744, connecting rod 75, control assembly 751, drive shaft 752, linkage plate 753, top rod 754, right angle notch positioner 755, limit rod 756, mounting seat 757, top plate 76, limit fixing assembly 761, upright rod 762, horizontal plate 763, connecting plate 764, safety upper positioning assembly. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings. Example 1

[0031] like Figure 1-4As shown, a primary and secondary integrated built-in isolating switch circuit breaker includes a housing 1 located on one side of a pole-mounted circuit breaker. A detachable, snap-fit ​​cover 2 is attached to the top opening of the housing 1. An isolating switch unit is located inside the housing 1 and is electrically connected to an electrical connection device 6 located on the outer wall of the housing 1. The electrical connection device 6 is electrically connected to the pole-mounted circuit breaker. A control mechanism 3 is installed on the front of the housing 1. The control mechanism 3 controls the opening and closing state of the isolating switch unit. When the control mechanism 3 drives the isolating switch unit to the closed state, it rotates to connect with the corresponding stationary contact for conduction. When the control mechanism 3 drives the isolating switch unit to the open state, it rotates in the opposite direction to connect with the corresponding safety device for conduction, thus achieving reliable isolation. The safety device is connected to a grounding bolt 5 located on the side of the housing 1.

[0032] Multiple locking assemblies 11 are provided on the circumference of the housing 1. Each locking assembly 11 includes a top cover locking plate 101 fixed to the outer wall of the housing 1. A top cover lock U-shaped component 102 is movably installed on the top cover locking plate 101. A top cover locking adjusting screw component 103 is rotatably connected to the middle of the top cover locking U-shaped component 102. A top cover locking nut pull ring component 104 is threadedly installed at the upper threaded end of the top cover locking adjusting screw component 103.

[0033] The opening and closing box cover 2 includes an upper cover 21. The top surface of the upper cover 21 is provided with multiple U-shaped handles 22. The inner side of the upper cover 21 corresponding to the box body 1 is provided with a top cover sealing buckle frame 23 that matches the edge of the top opening of the box body 1. The top cover sealing buckle frame 23 and the top wall of the box body 1 are reliably sealed and connected by a rubber sealing strip 24. The outer side of the upper cover 21 is provided with a locking hook plate 25 that cooperates with the top cover locking nut pull ring 104 to realize the quick locking of the box body 1 and the opening and closing box cover 2.

[0034] The control mechanism 3 includes a fixed plate 31 installed in front of the housing 1. A U-shaped component 32 is fixed in front of the fixed plate 31. A control handle 33 is provided inside the U-shaped component 32. A main shaft 34 is installed inside the control handle 33. A safety isolation insulator 35 is fitted on the outside of the main shaft 34. One end of the main shaft 34 passes through the control handle 33 and is connected to the U-shaped component 32 shaft. The other end is connected to the isolating switch unit. The isolating switches of the isolating switch unit are synchronously linked by a coupling rod 36.

[0035] The isolating switch unit is a downward rotating isolating switch mechanism 4. The downward rotating isolating switch mechanism 4 includes a plurality of groups of isolating switch assemblies 401 with the same structure. Each of the isolating switch assemblies 401 includes a convex-shaped base plate 41. A first post insulator 42 and a second post insulator 43 are respectively installed at both ends of an upper part of the base plate 41. A mounting bent plate 44 is arranged on a top of the first post insulator 42, a guide contact bushing 45 is arranged on a side wall of the mounting bent plate 44, and a guide positioning plate 46 capable of rotating downward relative to a central axis of a main shaft 34 is arranged behind each guide contact bushing 45. An isolating blade 47 is arranged inside the guide positioning plate 46.

[0036] A T-shaped plate 49 is arranged on a top of the second post insulator 43, and a static contact 410 is arranged below one end of the T-shaped plate 49. One end of the isolating blade 47 is inserted into a U-shaped opening at a lower part of the guide contact bushing 45, and the other end is in inserted conduction fit with the static contact 410 in a switching-on state. One end of the isolating blade 47 close to the guide contact bushing 45 is connected to the mounting bent plate 44 through a grounding cable 48. The isolating switch assemblies 401 are connected through a coupling shaft 36.

[0037] In this embodiment, when a switching-on operation is required, it only needs to drive the main shaft to rotate through the control mechanism. One end of the main shaft will drive the guide positioning plate and the isolating blade to rotate. One end of the isolating blade close to the guide contact bushing is located inside the guide positioning plate, and the two cooperate with each other to increase the mechanical strength of the isolating blade, so that the isolating blade can rotate more stably and smoothly. In addition, it can also keep one end of the isolating blade away from the guide positioning plate stable, so as to prevent the end from shaking or vibrating, thereby enabling fast and accurate switching-on docking. With the upward rotation of the isolating blade, one end of the isolating blade corresponding to the static contact will gradually contact the static contact until reliable docking is achieved, so that the isolating blade and the static contact are tightly inserted, ensuring the stability and conductivity of the current carrying path, and completing the switching-on operation.

[0038] The safety device is a safety lower positioning assembly 402 located inside a rectangular opening of the base plate 41. The safety lower positioning assembly 402 has the same structure as the static contact 410 and is vertically symmetrical to the static contact 410. The safety lower positioning assembly 402 includes an arc-shaped plate 421, a positioning seat 422 is installed on an upper part of the arc-shaped plate 421, and a set of bending guide parts 423 are symmetrically arranged at an insertion opening for inserting the isolating blade 47 on an upper part of the positioning seat 422. Positioning springs 424 are installed between each bending guide part 423 and an inner wall of the positioning seat 422, so that the isolating blade 47 is inserted into and conducted with the corresponding safety lower positioning assembly 402 in a switching-off state. The safety lower positioning assemblies 402 are connected through a U-shaped connecting piece 425 on a side wall of the arc-shaped plate 421, and the U-shaped connecting piece 425 is connected to a grounding bolt 5 through a main grounding plate 403.

[0039] In this embodiment, when a tripping operation is required, the main shaft is rotated by the control mechanism. One end of the main shaft will drive the guide positioning plate and the isolation blade to rotate. As the isolation blade rotates downward, the end of the isolation blade inserted into the stationary contact will gradually disengage from the stationary contact. As the isolation blade continues to rotate downward, the isolation blade contacts the safety lower positioning component until it is reliably connected. At this time, the isolation blade and the stationary contact form a clear mechanical isolation gap, which can completely cut off the electrical circuit and meet the safety isolation requirements during maintenance. Moreover, the isolation blade is tightly inserted into the safety lower positioning component to ensure that the isolation blade is reliably grounded, ensuring the safety grounding requirements during maintenance and completing the tripping operation. Specifically, when the isolating blade contacts the safety lower positioning assembly, the isolating blade first enters the positioning seat using the guiding action of the bending guide. Then, the positioning spring between the bending guide and the inner wall of the positioning seat compresses the isolating blade, allowing it to be stably and firmly clamped inside the positioning seat, achieving a reliable connection. (Similarly, the connection process between the isolating blade and the stationary contact is the same, such as...) Figure 4 (As shown).

[0040] This invention relates to a primary and secondary integrated built-in isolating switch circuit breaker. In use, the isolating switch unit is integrated inside the enclosure and electrically connected to the pole-mounted circuit breaker via an electrical connection device. This not only facilitates connection but also reduces contact between the electrical connection parts and the external environment, effectively isolating them from outdoor elements such as wind, rain, dust, and corrosive gases, thus ensuring operational stability. Furthermore, this invention employs a rotating docking isolating switch mechanism. This rotating docking method eliminates the problems of jamming and switch misalignment that are unavoidable with lateral translation, achieving rapid and precise docking of the moving and stationary contacts. Moreover, the rotating docking method allows for docking of the moving and stationary contacts with a simple swing, without requiring additional clearance. The invention provides ample lateral operating space, significantly reducing the overall installation volume of the equipment. Furthermore, it eliminates the need for a spring reset mechanism, effectively preventing spring fatigue and aging that could slow down or prevent the switch from resetting properly, or even create additional load on the lateral movement of the switch, ultimately leading to operation failure. The invention employs upper or lower safety devices to reliably position the switch after it has been opened, ensuring electrical isolation safety. Even in severe weather conditions such as strong winds or icing, or when the equipment experiences abnormal vibrations, the isolation gap meets the rated safety distance requirements, greatly improving the equipment's operational safety. This invention boasts advantages such as a reasonable structure, excellent protection, stable and reliable operation, and guaranteed electrical isolation. Example 2

[0041] like Figure 5-7As shown, a primary and secondary integrated built-in isolating switch circuit breaker includes a housing 1 located on one side of a pole-mounted circuit breaker. A detachable, snap-fit ​​cover 2 is attached to the top opening of the housing 1. An isolating switch unit is located inside the housing 1 and is electrically connected to an electrical connection device 6 located on the outer wall of the housing 1. The electrical connection device 6 is electrically connected to the pole-mounted circuit breaker. A control mechanism 3 is installed on the front of the housing 1. The control mechanism 3 controls the opening and closing state of the isolating switch unit. When the control mechanism 3 drives the isolating switch unit to the closed state, it rotates to connect with the corresponding stationary contact for conduction. When the control mechanism 3 drives the isolating switch unit to the open state, it rotates in the opposite direction to connect with the corresponding safety device for conduction, thus achieving reliable isolation. The safety device is connected to a grounding bolt 5 located on the side of the housing 1.

[0042] Multiple locking assemblies 11 are provided on the circumference of the housing 1. Each locking assembly 11 includes a top cover locking plate 101 fixed to the outer wall of the housing 1. A top cover lock U-shaped component 102 is movably installed on the top cover locking plate 101. A top cover locking adjusting screw component 103 is rotatably connected to the middle of the top cover locking U-shaped component 102. A top cover locking nut pull ring component 104 is threadedly installed at the upper threaded end of the top cover locking adjusting screw component 103.

[0043] The opening and closing box cover 2 includes an upper cover 21. The top surface of the upper cover 21 is provided with multiple U-shaped handles 22. The inner side of the upper cover 21 corresponding to the box body 1 is provided with a top cover sealing buckle frame 23 that matches the edge of the top opening of the box body 1. The top cover sealing buckle frame 23 and the top wall of the box body 1 are reliably sealed and connected by a rubber sealing strip 24. The outer side of the upper cover 21 is provided with a locking hook plate 25 that cooperates with the top cover locking nut pull ring 104 to realize the quick locking of the box body 1 and the opening and closing box cover 2.

[0044] The control mechanism 3 includes a fixed plate 31 installed in front of the housing 1. A U-shaped component 32 is fixed in front of the fixed plate 31. A control handle 33 is provided inside the U-shaped component 32. A main shaft 34 is installed inside the control handle 33. A safety isolation insulator 35 is fitted on the outside of the main shaft 34. One end of the main shaft 34 passes through the control handle 33 and is connected to the U-shaped component 32 shaft. The other end is connected to the isolating switch unit. The isolating switches of the isolating switch unit are synchronously linked by a coupling rod 36.

[0045] The isolating switch unit is an upward rotating isolating switch mechanism 7. The upward rotating isolating switch mechanism 7 includes a base 71. Multiple sets of first supporting insulators 72 and second supporting insulators 73 are symmetrically arranged on the left and right sides of the base 71. An L-shaped plate 721 is provided on the top of the first supporting insulator 72, and a hinge seat 722 is installed on the inner side of the L-shaped plate 721. A straight plate 731 is provided on the top of the second supporting insulator 73, and a stationary contact plate 732 is provided on the straight plate 731. The first supporting insulator 72 and the second supporting insulator 73 are connected by an isolating switch assembly 74. The isolating switch assembly 74 uses a control component 75 to realize the opening and closing operation.

[0046] The isolating switch assembly 74 includes an isolating switch body 741. One end of the isolating switch body 741 is movably hinged to the hinge seat 722 via a spring shaft pin 742, and the other end is dynamically connected and disconnected from the stationary contact plate 732 via a moving contact rod 743. A connecting rod 744 is installed in the middle. The control assembly 75 includes a drive shaft 751 that passes through the base 71. A linkage plate 752 is installed on the outside of the drive shaft 751 corresponding to the isolating switch body 741. A top rod 753 is movably connected to the upper part of the linkage plate 752. The upper end of the top rod 753 is connected to the connecting rod 744. Right-angle notch locators 754 are fitted on both ends of the drive shaft 751 that extend out of the base 71. A limit rod 755 is engaged at the lower part of the right-angle notch locator 754. The limit rod 755 is fixed to the base 71 by a set of mounting seats 756, and a top plate 757 is abutted against one end of the limit rod 755.

[0047] In this embodiment, the isolating switch assembly is composed of a set of symmetrically arranged plate-like structures, which have sufficient overall mechanical strength and can rotate more stably and smoothly. Moreover, its two ends and the middle are connected by rod-like structures, which further improves its mechanical strength and can prevent the end that docks with the stationary contact plate from shaking or vibrating. When a closing operation is required, the control mechanism is linked to the control component to make the drive shaft rotate. The drive shaft drives the linkage plate to rotate, and the linkage plate will drive the push rod to move downward. The push rod pulls the isolating switch assembly downward through the connecting rod, so that one end of the isolating switch assembly rotates around the hinge seat. The moving contact rod and the stationary contact plate at the other end of the isolating switch assembly will gradually contact the stationary contact until they are reliably docked, so that the isolating blade and the stationary contact plate are tightly inserted, ensuring the stability and conductivity of the current carrying path, and completing the closing operation.

[0048] The safety device is a limiting and fixing assembly 76, which includes multiple uprights 761 fixed on the base 71. The tops of a group of uprights 761 on the left and right are connected by a horizontally arranged transverse plate 762. The multiple transverse plates 762 are connected by a set of connecting plates 763. The middle of each transverse plate 762 is provided with a safety upper positioning assembly 764 with the same structure as the stationary contact 410 in the upward rotation trajectory of the isolating switch assembly 74. The safety upper positioning assemblies 764 are connected by a U-shaped connecting piece 425. During the closing process, the control assembly 75 rotates the isolating switch assembly 74 downward and pushes it against the stationary contact plate 732, so that the moving contact rod 743 is in close contact with the stationary contact plate 732. During the opening process, the control assembly 75 reverses the action, rotating the isolating switch assembly 74 upward and pushing it against the safety upper positioning assembly 764, so that the moving contact rod 743 is in close contact with the safety upper positioning assembly 764.

[0049] In this embodiment, when a tripping operation is required, the control mechanism is linked to the control components to rotate the drive shaft. The drive shaft drives the linkage plate to rotate, which in turn drives the push rod to move upward. The push rod pushes the isolating switch assembly upward through the connecting rod, causing one end of the isolating switch assembly to rotate around the hinge seat. The moving contact rod at the other end of the isolating switch assembly gradually separates from the stationary contact plate. As the isolating switch assembly continues to rotate upward, the moving contact rod contacts the safety upper positioning component until it is reliably connected. At this time, the isolating switch assembly and the stationary contact plate form a clear mechanical isolation gap, which can completely cut off the electrical circuit and meet the safety isolation requirements during maintenance. Moreover, the isolating switch assembly and the safety upper positioning component are tightly connected to ensure that the isolating switch assembly is reliably grounded, ensuring the safety grounding requirements during maintenance operations and completing the tripping operation. Specifically, when the moving contact rod of the isolating switch assembly comes into contact with the safety positioning assembly, the moving contact rod first enters the positioning seat through the guiding action of the bending guide part. Then, the positioning spring between the bending guide part and the inner wall of the positioning seat will squeeze the moving contact rod, so that the moving contact rod can be stably and firmly clamped inside the positioning seat, achieving a reliable connection.

[0050] This invention relates to a primary and secondary integrated built-in isolating switch circuit breaker. In use, the isolating switch unit is integrated inside the enclosure and electrically connected to the pole-mounted circuit breaker via an electrical connection device. This not only facilitates connection but also reduces contact between the electrical connection parts and the external environment, effectively isolating them from outdoor elements such as wind, rain, dust, and corrosive gases, thus ensuring operational stability. Furthermore, this invention employs a rotating docking isolating switch mechanism. This rotating docking method eliminates the problems of jamming and switch misalignment that are unavoidable with lateral translation, achieving rapid and precise docking of the moving and stationary contacts. Moreover, the rotating docking method allows for docking of the moving and stationary contacts with a simple swing, without requiring additional clearance. The invention provides ample lateral operating space, significantly reducing the overall installation volume of the equipment. Furthermore, it eliminates the need for a spring reset mechanism, effectively preventing spring fatigue and aging that could slow down or prevent the switch from resetting properly, or even create additional load on the lateral movement of the switch, ultimately leading to operation failure. The invention employs upper or lower safety devices to reliably position the switch after it has been opened, ensuring electrical isolation safety. Even in severe weather conditions such as strong winds or icing, or when the equipment experiences abnormal vibrations, the isolation gap meets the rated safety distance requirements, greatly improving the equipment's operational safety. This invention boasts advantages such as a reasonable structure, excellent protection, stable and reliable operation, and guaranteed electrical isolation.

Claims

1. A primary and secondary integrated built-in isolating switch circuit breaker, comprising a housing located on one side of the pole-mounted circuit breaker, characterized in that: A openable and closable box cover is detachably fastened and installed at the opening at the top of the box body, an isolating switch unit is arranged inside the box body, the isolating switch unit is electrically connected with an electrical connection device arranged on the outer side wall of the box body, and the electrical connection device is electrically connected with the pole-mounted circuit breaker; a control mechanism is installed on the front face of the box body, the control mechanism is used for controlling the switching-on and switching-off state of the isolating switch unit, when the control mechanism drives the isolating switch unit to be in the switching-on state, the isolating switch unit is rotated to be inserted into and conducted with the corresponding static contact; when the control mechanism drives the isolating switch unit to be in the switching-off state, the isolating switch unit is rotated in the opposite direction to be inserted into and conducted with the corresponding safety device, so as to complete reliable isolation; the safety device is connected with a grounding bolt located on the side of the box body.

2. The integrated primary and secondary isolation circuit breaker as described in claim 1, characterized in that: A plurality of locking assemblies are arranged on the peripheral surface of the box body, each locking assembly comprises a top cover locking plate fixedly arranged on the outer wall of the box body, a U-shaped top cover locking part is movably installed on the top cover locking plate, the middle part of the U-shaped top cover locking part is rotatably connected with a top cover locking adjusting screw part, and a top cover locking nut pull ring part is installed on the upper threaded end of the top cover locking adjusting screw part in threaded fit.

3. The integrated primary and secondary isolation circuit breaker as described in claim 2, characterized in that: The openable and closable box cover comprises an upper cover, a plurality of U-shaped handles are arranged on the top surface of the upper cover, a top cover sealing fastening frame matched with the edge of the top opening of the box body is arranged on the inner side surface of the upper cover corresponding to the box body, reliable sealing connection between the top cover sealing fastening frame and the top wall of the box body is realized by means of a rubber sealing strip, and lock hook plates matched with the top cover locking nut pull ring parts are arranged on the outer side surface of the upper cover, so that rapid locking of the box body and the openable and closable box cover is realized.

4. The integrated primary and secondary isolation circuit breaker as described in claim 3, characterized in that: The control mechanism comprises a fixed plate installed on the front face of the box body, a U-shaped part is fixedly arranged on the front face of the fixed plate, a control handle is arranged inside the U-shaped part, a main shaft is installed inside the control handle, a safety isolation insulator is sleeved outside the main shaft, one end of the main shaft passes through the control handle to be shaft-connected with the U-shaped part, the other end of the main shaft is connected with the isolating switch unit, and the isolating switches of the isolating switch unit are synchronously linked by a coupling rod.

5. The integrated primary and secondary isolation circuit breaker as described in claim 4, characterized in that: The isolating switch unit is a downward rotating isolating switch mechanism, the downward rotating isolating switch mechanism comprises a plurality of groups of isolating switch assemblies with the same structure, each isolating switch assembly comprises a bottom plate with a convex-shaped structure, a first post insulator and a second post insulator are respectively installed at both ends of the upper part of the bottom plate, an installation bent plate is arranged at the top of each first post insulator, a guide contact bushing is arranged on the side wall of each installation bent plate, a guide positioning plate capable of rotating downward relative to the central axis of the main shaft is arranged behind each guide contact bushing, and an isolating blade is arranged inside the guide positioning plate.

6. The integrated primary and secondary isolation circuit breaker as described in claim 5, characterized in that: A T-shaped plate is arranged at the top of each second post insulator, a static contact is arranged below one end of the T-shaped plate, one end of the isolating blade is inserted into the U-shaped opening at the lower part of the guide contact bushing, and the other end of the isolating blade is in insertion conduction fit with the static contact in the switching-on state, one end of the isolating blade close to the guide contact bushing is connected with the installation bent plate through a grounding cable; the isolating switch assemblies are connected through the coupling rod.

7. A primary and secondary integrated built-in isolating circuit breaker as described in claim 6, characterized in that: The safety device is a safety lower positioning component located inside the rectangular opening of the base plate. The safety lower positioning component has the same structure as the stationary contact and is symmetrical to it. It includes an arc-shaped plate, on the upper part of which a positioning seat is installed. A set of bent guide parts are symmetrically arranged at the insertion port of the positioning seat for the isolation blade to be inserted. A positioning spring is installed between the bent guide part and the inner wall of the positioning seat, so that the isolation blade can be inserted and connected with the corresponding safety lower positioning component in the open state. The safety lower positioning components are connected to each other through a U-shaped connecting piece located on the side wall of the arc-shaped plate. The U-shaped connecting piece is connected to the grounding bolt through the main grounding plate.

8. A primary and secondary integrated built-in isolating circuit breaker as described in claim 1 or 5, characterized in that: The isolating switch unit is an upward rotating isolating switch mechanism. The upward rotating isolating switch mechanism includes a base, on which multiple sets of first and second supporting insulators are symmetrically arranged on the left and right sides. An L-shaped plate is provided on the top of the first supporting insulator, and a hinge seat is installed on the inner side of the L-shaped plate. A straight plate is provided on the top of the second supporting insulator, and a stationary contact plate is provided on the straight plate. The first and second supporting insulators are connected by an isolating switch assembly, and the isolating switch assembly uses a control component to realize the opening and closing operation.

9. A primary and secondary integrated built-in isolating circuit breaker as described in claim 8, characterized in that: The isolating switch assembly includes an isolating switch body. One end of the isolating switch body is movably hinged to a hinge seat via a spring shaft pin, and the other end is dynamically connected and disconnected via a moving contact rod and a stationary contact plate. A connecting rod is installed in the middle. The control assembly includes a drive shaft that passes through the base. A linkage plate is installed on the outside of the drive shaft corresponding to the isolating switch body. A top rod is movably connected to the upper part of the linkage plate. The upper end of the top rod is connected to the connecting rod. Right-angle notch positioners are fitted on both ends of the drive shaft that extend out of the base. A limit rod is engaged at the lower part of each right-angle notch positioner. The limit rod is fixed to the base by a set of mounting seats, and one end of the limit rod is pressed against a top plate.

10. A primary and secondary integrated built-in isolating circuit breaker as described in claim 1 or 7, characterized in that: The safety device is a limiting and fixing assembly, which includes multiple uprights fixed on the base. The tops of a group of uprights on the left and right are connected by a horizontally arranged plate. The multiple horizontal plates are connected by a set of connecting plates. The middle of each horizontal plate is provided with a safety upper positioning component with the same structure as the stationary contact in the upward rotation trajectory of the isolating switch assembly. The safety upper positioning components are connected by a U-shaped connecting piece. During the closing process, the control component rotates the isolating switch assembly downward and pushes it against the stationary contact plate, so that the moving contact rod is in close contact with the stationary contact plate. During the tripping process, the control component reverses its action, rotating the isolating switch assembly upwards and pushing it against the safety upper positioning component, so that the moving contact rod makes close contact with the safety upper positioning component.

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