Primary and secondary fusion complete column-mounted circuit breaker

Abstract

The invention relates to a primary and secondary fusion complete column-mounted circuit breaker, and relates to the technical field of circuit breakers, the primary and secondary fusion complete column-mounted circuit breaker comprises a circuit breaker main body, a plurality of insulation columns are fixedly arranged on the top surface of the circuit breaker main body, a support frame is fixedly arranged on one side of the circuit breaker main body, and an isolation switch is fixedly arranged on the support frame; a bearing plate is arranged below the circuit breaker main body, and limiting plates are fixedly arranged on two opposite edges of the top of the bearing plate; rotating convex blocks are fixedly arranged on two side surfaces of the circuit breaker main body; a limiting notch is formed in the top surface of the limiting plate; the circuit breaker main body can rotate around the axis of the rotating shaft to an application state in which the insulating column faces upwards and an assembly state in which the supporting frame faces upwards, and locking pieces are arranged on the two limiting plates; core power electronic components such as an insulated gate bipolar transistor (IGBT) chip and a module are integrated in the pole-mounted circuit breaker, the stable posture that the supporting frame faces upwards in the assembling process is guaranteed, workers can conveniently and accurately install the disconnecting switch, and the stable running state that the insulating column faces upwards in the application process can be guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of circuit breakers, and in particular to a primary and secondary integrated pole-mounted circuit breaker. Background Technology

[0002] As a key piece of equipment in the power distribution network, pole-mounted circuit breakers (PBRs) primarily function to protect and control lines, serving as crucial support for ensuring the stable operation of the power grid. From a structural perspective, PBRs integrate core power electronic components such as insulated-gate bipolar transistor (IGBT) chips and modules, providing the hardware foundation for precise protection and efficient control.

[0003] In related technologies, a pole-mounted circuit breaker includes a circuit breaker body, wherein three insulating columns for insulation protection are fixed on the top surface of the circuit breaker body, and a support frame is fixedly installed on one vertical side of the circuit breaker body, wherein a disconnecting switch for line isolation is fixedly installed on the top surface of the support frame; in high-altitude installation scenarios, the circuit breaker is fixed to the upper surface of the crossarm between two utility poles by screws to ensure a stable installation.

[0004] When assembling the pole-mounted circuit breaker in the factory, installing the insulating column on top of the main body is simple and quick; however, installing the support frame and disconnector requires first fixing the circuit breaker main body with a special clamping structure, then rotating the main body so that the support frame faces upwards, and finally unclamping it after installation. The entire process is cumbersome, increasing operational complexity and significantly reducing assembly efficiency, indicating significant room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a primary and secondary integrated pole-mounted circuit breaker to solve the problems of cumbersome installation of disconnecting switches and low overall efficiency of the aforementioned circuit breakers.

[0006] The technical solution for a primary and secondary integrated pole-mounted circuit breaker provided in this application is as follows: A primary and secondary integrated pole-mounted circuit breaker includes a circuit breaker body. Several insulating columns are fixed to the top surface of the circuit breaker body, and a support frame is fixed to a horizontal direction on one vertical surface. A disconnecting switch is fixed to the top surface of the support frame. A receiving plate is provided below the circuit breaker body, and vertically upward-facing limiting plates are fixed to the two opposite sides of the top of the receiving plate. Rotating protrusions are fixed to the two opposite vertical sides of the circuit breaker body. Limiting notches are formed on the top surfaces of the limiting plates. When the circuit breaker body is between the two limiting plates, the rotating protrusions can move downwards and engage with the limiting notches. The circuit breaker body can rotate around the axis of a rotating shaft to an application state with the insulating columns facing upwards and an assembly state with the support frame facing upwards. Locking elements are provided on the mutually distancing sides of the two limiting plates to lock and limit the circuit breaker body in these two states.

[0007] By adopting the above technical solution, the receiving plate and the limiting plate form a basic support structure. With the interlocking design of the rotating protrusion and the limiting notch of the circuit breaker body, the circuit breaker body can flexibly switch to the assembly state with the support frame facing upward and the application state with the insulating column facing upward around the axis of the rotating protrusion without the need for a special clamping structure. This greatly simplifies the assembly process, reduces unnecessary clamping and unclamping steps, and significantly improves the installation efficiency of the disconnecting switch. Secondly, in both states, the circuit breaker body can be directly locked and limited by the locking parts on the limiting plate. This ensures the stable posture of the support frame facing upward during assembly, which is convenient for workers to accurately install the disconnecting switch, and also ensures the stable operating state of the insulating column facing upward during application, taking into account both operational convenience and equipment stability.

[0008] Optionally, the locking component includes a locking rod, a first insert fixed to one end of the locking rod, and a second insert fixed to the other end of the locking rod; a plurality of first slots are provided on the outer side of the rotating protrusion, and a second slot located below the first slot is fixed on the side of the two limiting plates that are far apart from each other; when the first insert is inserted into the second slot, the first insert is simultaneously inserted into the corresponding first slot.

[0009] By adopting the above technical solution, the locking rod is integrated with the first and second insert blocks. Combined with the first slot of the rotating protrusion and the second slot of the limiting plate, the first insert block can be simultaneously engaged in the first slot when the second insert block is inserted into the second slot, achieving "one insertion, two locks." This ensures a secure lock, preventing the circuit breaker body from loosening during assembly or application, while simplifying the locking operation without complex steps. It also adapts to the locking requirements of both states, improving equipment reliability and operational efficiency.

[0010] Optionally, an elastic positioning rod is fixed on the side of the two limiting plates that are far apart from each other. The elastic positioning rod can shorten and elastically extend to return to its original position. One end of the elastic positioning rod is rotatably connected to the limiting plate, and the rotation surface of the elastic positioning rod is parallel to the vertical plane of the two limiting plates facing away from each other. The elastic positioning rod has a positioning notch on its upper end surface when it is in the vertically upward state, and the lower end of the locking rod can be inserted into the positioning notch when the elastic positioning rod is in the vertically upward state.

[0011] By adopting the above technical solution, the elastic positioning rod can elastically extend and retract and rotate around the limiting plate. When it is vertically upward, the positioning notch at the upper end can be engaged with the lower end of the locking rod, forming a secondary limit outside the basic locking of the locking component, preventing the circuit breaker from shifting due to loosening of the locking rod. At the same time, the elastic characteristics and rotation design are adapted to the position of the locking rod, and auxiliary locking can be completed without complicated adjustments. This not only enhances the structural stability of the circuit breaker in the assembly and application state, but also does not add extra operational difficulty, thus improving the overall reliability of the equipment.

[0012] Optionally, the two limiting plates are provided with a fixed block that can move up and down on their opposite sides, and an elastic element that pushes the fixed block upward; a traction rope is provided on the outside of the limiting plate, and the two ends of the traction rope are detachably connected to the outer side of the fixed block and the outer side of the elastic positioning rod, respectively; the fixed block is pressed by the elastic element and the elastic positioning rod is kept vertically upward by the traction rope.

[0013] By adopting the above technical solution, the elastic element pushes the fixed block upward, and the elastic positioning rod is pulled by the detachable traction rope, so that it is stably kept in a vertical upward state. No manual continuous fixation is required, which avoids the elastic positioning rod from shifting due to external force or its own elasticity, and ensures the auxiliary limiting effect on the locking rod. At the same time, the detachable design of the traction rope facilitates subsequent adjustment or maintenance. The cooperation between the fixed block and the elastic element realizes the automated state maintenance, which not only improves the structural stability, but also simplifies the operation process and further optimizes the reliability of equipment assembly and operation.

[0014] Optionally, hooks are fixed at both ends of the traction rope, and clasps for the hooks to engage are fixed on the outer side of the fixing block and the outer side of the elastic positioning rod.

[0015] By adopting the above technical solution, the hook and the circlip work together to connect the two ends of the traction rope. During operation, simply insert or remove the hook into the circlip to quickly assemble or disassemble the traction rope from the fixing block and the elastic positioning rod. No complicated tools or steps are required, which greatly improves the convenience of connection and separation.

[0016] Optionally, a fixing rod is fixed on the vertical surfaces of the support frame that are far apart from each other; when the circuit breaker body is in the application state, the elastic positioning rod can rotate toward the fixing rod so that the fixing rod is engaged in the positioning notch.

[0017] By adopting the above technical solution, when the circuit breaker body is in the application state, the elastic positioning rod can be rotated until the fixed rod is engaged in its positioning notch. On the one hand, the elastic positioning rod can be used to support the fixed rod of the support frame, offsetting the lateral force that may be generated during the operation of the circuit breaker, and greatly improving the structural stability of the support frame and even the entire equipment. On the other hand, there is no need to add additional special support components. The support function can be achieved by using the existing elastic positioning rod, which simplifies the structural design, reduces costs, and ensures more reliable operation of the equipment in the application state, further optimizing the overall performance of the equipment.

[0018] Optionally, a fixing notch is provided on the bottom surface of the fixing block; when the fixing rod is inserted into the positioning notch, the fixing block will move downward by the traction rope to overcome the elastic force of the elastic element, and the upper part of the locking rod can be inserted into the fixing notch after the fixing block moves downward.

[0019] By adopting the above technical solution, when the fixed rod is engaged in the positioning notch, the fixed block moves downward via the traction rope, causing the upper part of the locking rod to engage in the fixing notch, forming a dual guarantee of "elastic positioning rod support + fixed block locking". This not only compensates for the lack of restraint at the lower part of the locking rod when the elastic positioning rod is turned for support, but also achieves secondary locking of the locking rod through structural linkage to prevent it from loosening; at the same time, support and locking can be completed simultaneously without additional operation, taking into account both locking reliability and operational convenience, and further enhancing the structural stability of the circuit breaker in the application state.

[0020] Optionally, an extension block is fixed on the two opposite sides of the lower part of the limiting plate, and a clearance notch is opened on the side of the two extension blocks that are far apart from each other; a support block that can slide horizontally is slidably provided on the inner wall of the clearance notch, and a connector connecting the fixing block and the support block is provided on the outside of the limiting plate. When the fixing block moves down, the connector drives the two support blocks to slide out from the clearance notch in a direction that is far apart from each other.

[0021] By adopting the above technical solution, the extension block and the clearance notch provide storage space for the support block, avoiding the occupation of extra space when idle; when the fixed block moves down (corresponding to the circuit breaker application state), the connecting parts drive the support block to slide out from the clearance notch and move away from each other, increasing the contact area between the equipment and the mounting surface, greatly improving the overall stability in the application state, and making it more reliable to cope with complex outdoor working conditions; moreover, the extension and retraction of the support block and the movement of the fixed block are linked, requiring no additional operation, which simplifies the process and allows the support range to be adjusted as needed, taking into account both structural stability and ease of use.

[0022] Optionally, the connector includes a vertical rod that slides vertically on the side of the support plate facing the extension block, a connecting rod that is rotatably connected at one end to the lower end of the vertical rod, a protruding block that is fixedly connected to the upper end of the vertical rod on the fixing block, and the other end of the connecting rod that is rotatably connected to the top surface of the support block.

[0023] By adopting the above technical solution, the connector, through the cooperation of the vertical rod, connecting rod and protruding block, transforms the up-and-down movement of the fixed block into the horizontal sliding of the support block. The power transmission is direct and precise, avoiding movement deviation. The design of the vertical rod sliding in the vertical direction and the connecting rod rotating at both ends adapts to the different movement directions of the fixed block and the support block, ensuring smooth linkage. At the same time, the movement of the fixed block automatically drives the extension and retraction of the support block, eliminating the need for additional drive components. This simplifies the structure and allows the support block to adjust synchronously with the circuit breaker's state switching, further improving the equipment's ease of operation and structural coordination.

[0024] Optionally, guide protrusions are fixed on the two opposite vertical sides of the support block, and guide grooves are provided on the inner wall of the clearance notch for the guide protrusions to be inserted and slide back and forth.

[0025] By adopting the above technical solution, the cooperation between the guide protrusion and the guide groove provides precise guidance for the horizontal sliding of the support block within the clearance notch, effectively preventing the support block from shifting or getting stuck during sliding, and ensuring that its extension and retraction process is smooth and stable.

[0026] In summary, this application includes the following beneficial technical effects: In this pole-mounted circuit breaker, the receiving plate and the limiting plate form the basic support structure. With the interlocking design of the rotating protrusion and the limiting notch of the circuit breaker body, the circuit breaker body can flexibly switch to the assembly state with the support frame facing upward and the application state with the insulating column facing upward around the axis of the rotating protrusion without the need for a special clamping structure. This greatly simplifies the assembly process, reduces unnecessary clamping and unclamping steps, and significantly improves the installation efficiency of the disconnecting switch. Secondly, in both states, the circuit breaker body can be directly locked and limited by the locking parts on the limiting plate. This ensures the stable posture with the support frame facing upward during assembly, which is convenient for workers to accurately install the disconnecting switch, and also ensures the stable operating state with the insulating column facing upward during application, taking into account both operational convenience and equipment stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the installation and assembly of the receiving components in an embodiment of this application; Figure 3 This is a partial structural diagram illustrating the installation and cooperation of the receiving plate and the limiting plate in an embodiment of this application; Figure 4 This is an exploded structural diagram illustrating the installation distribution of the receiving components and locking parts in an embodiment of this application; Figure 5 This is a partial cross-sectional structural diagram illustrating the installation and mating of the locking component in an embodiment of this application; Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle; Figure 7 This is a schematic diagram illustrating the installation and assembly of the fixing rod in an embodiment of this application; Figure 8 This is a partial cross-sectional view of an embodiment of the present application illustrating the installation and cooperation of the fixed rod and the elastic positioning rod; Figure 9 yes Figure 8 Enlarged schematic diagram of part B; Figure 10 This is a partial structural diagram illustrating the installation and fit of the connecting parts in an embodiment of this application.

[0028] In the diagram, 1. Circuit breaker body; 11. Insulating column; 12. Support frame; 121. Fixing rod; 13. Disconnecting switch; 14. Rotating protrusion; 141. First slot; 2. Receiving assembly; 21. Receiving plate; 22. Limiting plate; 221. Limiting notch; 222. Second slot; 23. Extension block; 231. Clearance notch; 232. Guide groove; 24. Support block; 241. Guide protrusion; 3. Locking component; 31. Locking rod; 32. First insertion block; 33. Second insertion block; 34. Elastic positioning rod; 341. Positioning notch; 4. Fixing assembly; 41. Fixing block; 411. Fixing notch; 412. Protrusion; 413. Snap ring; 42. Elastic component; 421. Elastic telescopic rod; 43. Traction rope; 431. Hook; 5. Connecting component; 51. Vertical rod; 52. Connecting rod. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] Example: Reference Figure 1 , Figure 2 and Figure 3 A primary and secondary integrated pole-mounted circuit breaker includes a circuit breaker body 1, wherein three insulating columns 11 are fixed on the top surface of the circuit breaker body 1, and a support frame 12 is fixed on one vertical surface along the horizontal direction, and a disconnecting switch 13 is fixed on the top surface of the support frame 12. The circuit breaker body 1 is provided with a receiving assembly 2 on its exterior. The receiving assembly 2 includes a receiving plate 21 located below the circuit breaker body 1. Vertically upward limiting plates 22 are fixed on the two opposite sides of the top of the receiving plate 21. Cylindrical rotating protrusions 14 are fixed on the two opposite vertical sides of the circuit breaker body 1. Limiting notches 221 are opened on the top surface of the limiting plates 22. Locking elements 3 are provided on the sides of the two limiting plates 22 that are far apart from each other. When the circuit breaker body 1 is between the two limiting plates 22, the two rotating protrusions 14 can move down and respectively engage in the corresponding limiting notches 221. At this time, the circuit breaker body 1 can rotate around the axis of the rotating shaft to the application state with the insulating column 11 facing upward and the assembly state with the support frame 12 facing upward. When the circuit breaker body 1 is in the corresponding state, the operator can use the locking member 3 to lock and limit the two states of the circuit breaker body 1.

[0031] Reference Figure 4 and Figure 5 The locking component 3 includes a locking rod 31, a first insert 32 fixed to one end of the locking rod 31, and a second insert 33 fixed to the other end of the locking rod 31, wherein the locking rod 31, the first insert 32, and the second insert 33 are integrally formed. A number of first slots 141 are provided on the outer side of the rotating protrusion 14, and a second slot 222 located below the first slot 141 is fixed on the side of the two limiting plates 22 that are far apart from each other; when the first insert 32 is inserted into the second slot 222, the first insert 32 is simultaneously inserted into the corresponding first slot 141, so that the state of the circuit breaker body 1 can be locked by the locking member 3.

[0032] Reference Figure 4 and Figure 5 On the two limiting plates 22, an elastic positioning rod 34 is fixed on the side that is far apart from each other. The elastic positioning rod 34 includes a telescopic rod body and a spring located in the telescopic rod body. It can shorten and elastically extend to return to its original position. This is a conventional structure and will not be described in detail here. One end of the elastic positioning rod 34 is rotatably connected to the limiting plate 22, and the rotating surface of the elastic positioning rod 34 is parallel to the vertical surfaces of the two limiting plates 22 facing away from each other. The elastic positioning rod 34 has a positioning notch 341 on its upper surface when it is in the vertically upward state. When the elastic positioning rod 34 is in the vertically upward state, the lower end of the locking rod 31 can be inserted into the positioning notch 341, so as to further lock the locking rod 31 using the elastic positioning rod 34.

[0033] Reference Figure 5 and Figure 6 The two limiting plates 22 are provided with fixing components 4 on their mutually distant sides. The fixing components 4 include a fixing block 41 that slides on the limiting plate 22 and can move up and down, and an elastic element 42 that is provided on the limiting plate 22 and can push the fixing block 41 to move up. The limiting plate 22 is provided with a traction rope 43 that connects the fixing block 41 and the elastic positioning rod 34. The elastic element 42 is an elastic telescopic rod 421 with a structure similar to the elastic positioning rod 34. The lower end of the elastic telescopic rod 421 is fixedly connected to the limiting plate 22, and the upper end is fixedly connected to the bottom of the fixing block 41. Both ends of the traction rope 43 are fixed with hooks 431. The outer side of the fixing block 41 and the outer side of the elastic positioning rod 34 are both fixed with retaining rings 413 for the hooks 431 to engage, so as to detachably connect the two ends of the traction rope 43 to the fixing block 41 and the elastic positioning rod 34. Under the compression of the elastic element 42, the fixing block 41 can keep the elastic positioning rod 34 vertically upward through the traction rope 43, so as to avoid the installation stability of the elastic positioning rod 34 when it is in a vertical state without external force.

[0034] Reference Figure 7 , Figure 8 and Figure 9A fixing rod 121 is fixed on the vertical surfaces of the support frame 12 that are far apart from each other, and a fixing notch 411 is provided on the bottom surface of the fixing block 41. When the circuit breaker body 1 is in the application state, the elastic positioning rod 34 can rotate towards the fixing rod 121, so that the fixing rod 121 is inserted into the positioning notch 341. In this way, the elastic positioning rod 34 is used to provide auxiliary support for the support frame 12 in this state, thereby improving the overall structural stability of the pole-mounted circuit breaker. When the fixing rod 121 is engaged in the positioning notch 341, the fixing block 41 will move downwards by overcoming the elastic force of the elastic element 42 through the traction rope 43. After the fixing block 41 moves downwards, the upper part of the locking rod 31 can be engaged in the fixing notch 411. With this setting, even if the elastic positioning rod 34 cannot limit the lower part of the locking rod 31 at this time, the upper part of the locking rod 31 can be further locked by the fixing block 41.

[0035] Reference Figure 10 The lower two opposite sides of the limiting plate 22 are integrally formed with extension blocks 23. The two extension blocks 23 are provided with clearance notches 231 on the sides that are far apart from each other. The inner wall of the clearance notches 231 is provided with a support block 24 that can slide horizontally. The two opposite vertical sides of the support block 24 are integrally formed with guide protrusions 241, and the inner wall of the clearance notches 231 is provided with guide grooves 232 for the guide protrusions 241 to be inserted and slide back and forth. The bottom surfaces of the receiving plate 21, the extension block 23 and the support block 24 are flush. The outer side of the limiting plate 22 is provided with a connecting piece 5 that connects the fixing block 41 and the support block 24. The connecting piece 5 includes a vertical rod 51 that slides vertically on the side of the support plate facing the extension block 23, and a connecting rod 52 that is rotatably connected to the lower end of the vertical rod 51. The fixing block 41 is fixedly provided with a protruding block 412 that is fixedly connected to the upper end of the vertical rod 51. The other end of the connecting rod 52 is rotatably connected to the top surface of the support block 24. When the fixed block 41 moves down (that is, when the circuit breaker body 1 is in the application state), the two support blocks 24 are driven to slide out of the clearance notch 231 in a direction away from each other through the connector 5, thereby improving the overall installation stability of the pole-mounted circuit breaker; when the fixed block 41 moves up (that is, when the circuit breaker body 1 is in the assembly state), the two support blocks 24 are driven to slide towards each other through the connector 52, thereby storing the support blocks 24 inside the clearance notch 231.

[0036] The implementation principle of this application embodiment is as follows: Assembly state: The circuit breaker body 1 is rotated to the position where the support frame 12 faces upward, and the locking member 3 locks the circuit breaker body 1 in this state; at this time, the elastic member 42 pushes the fixing block 41 upward, and the elastic positioning rod 34 is kept vertical by the traction rope 43, and the lower part of the locking rod 31 is inserted into the positioning notch 341; when the fixing block 41 moves upward, the connecting member 5 drives the support block 24 to slide towards each other and be stored in the clearance notch 231; Application status: The circuit breaker body 1 rotates around the rotating protrusion 14 to the position where the insulating post 11 faces upward. The second insert 33 is inserted into the second slot 222, and the first insert 32 is simultaneously locked into the corresponding first slot 141. The elastic positioning rod 34 rotates to the fixed rod 121 and is locked into the positioning notch 341, which assists in supporting the support frame 12. The fixed block 41 is pulled down by the traction rope 43 and moves downward. The upper part of the locking rod 31 is locked into the fixing notch 411 of the fixed block 41, further locking the locking rod 31. At the same time, the fixed block 41 moves downward and drives the support block 24 to slide out from the clearance notch 231 through the connector 5, improving the overall stability.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A primary and secondary integrated pole-mounted circuit breaker, comprising a circuit breaker body (1), wherein a plurality of insulating columns (11) are fixedly disposed on the top surface of the circuit breaker body (1), and a support frame (12) is fixedly disposed on one vertical surface along the horizontal direction, wherein a disconnecting switch (13) is fixedly disposed on the top surface of the support frame (12); characterized in that, The circuit breaker body (1) is provided with a support plate (21) below it, and vertically upward limiting plates (22) are fixed on the two opposite sides of the top of the support plate (21). Rotating protrusions (14) are fixed on the two opposite vertical sides of the circuit breaker body (1). A limiting notch (221) is opened on the top surface of the limiting plate (22). When the circuit breaker body (1) is between the two limiting plates (22), the rotating protrusions (14) can move down and be inserted into the limiting notch (221). The circuit breaker body (1) can rotate around the axis of the rotating shaft to the application state with the insulating column (11) facing upward and the assembly state with the support frame (12) facing upward. The two limiting plates (22) are provided with locking members (3) on their mutually distant sides to lock and limit the two states of the circuit breaker body (1).

2. The integrated primary and secondary pole-mounted circuit breaker according to claim 1, characterized in that, The locking member (3) includes a locking rod (31), a first insert (32) fixed to one end of the locking rod (31), and a second insert (33) fixed to the other end of the locking rod (31); The outer side of the rotating protrusion (14) is provided with a plurality of first slots (141), and the two limiting plates (22) are fixed on the sides away from each other with a second slot (222) located below the first slot (141). When the first insert (32) is inserted into the second slot (222), the first insert (32) is simultaneously inserted into the corresponding first slot (141).

3. The primary and secondary integrated pole-mounted circuit breaker according to claim 2, characterized in that, An elastic positioning rod (34) is fixed on the side of the two limiting plates (22) that are far apart from each other. The elastic positioning rod (34) can shorten and elastically extend to return to its original position. One end of the elastic positioning rod (34) is rotatably connected to the limiting plate (22), and the rotating surface of the elastic positioning rod (34) is parallel to the vertical surfaces of the two limiting plates (22) facing away from each other; the elastic positioning rod (34) has a positioning notch (341) on its upper surface when it is in the vertical upward state, and the lower end of the locking rod (31) can be inserted into the positioning notch (341) when the elastic positioning rod (34) is in the vertical upward state.

4. A primary and secondary integrated pole-mounted circuit breaker according to claim 3, characterized in that, The two limiting plates (22) are provided with a fixed block (41) that can move up and down on the side away from each other, and an elastic member (42) that pushes the fixed block (41) to move up. The limiting plate (22) is provided with a traction rope (43) on the outside. The two ends of the traction rope (43) are detachably connected to the outer side of the fixed block (41) and the outer side of the elastic positioning rod (34), respectively. The fixed block (41) keeps the elastic positioning rod (34) vertically upward by means of the traction rope (43) pressing the elastic element (42).

5. A primary and secondary integrated pole-mounted circuit breaker according to claim 4, characterized in that, The two ends of the traction rope (43) are fixed with hooks (431), and the outer side of the fixed block (41) and the outer side of the elastic positioning rod (34) are both fixed with clasps (413) for the hooks (431) to be engaged.

6. A primary and secondary integrated pole-mounted circuit breaker according to claim 4, characterized in that, The support frame (12) has a fixed rod (121) fixed on the vertical surfaces that are far apart from each other; the elastic positioning rod (34) can rotate toward the fixed rod (121) when the circuit breaker body (1) is in the application state, so that the fixed rod (121) is inserted into the positioning notch (341).

7. A primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that, The bottom surface of the fixing block (41) is provided with a fixing notch (411); when the fixing rod (121) is inserted into the positioning notch (341), the fixing block (41) will move down by the traction rope (43) to overcome the elastic force of the elastic element (42), and the upper part of the locking rod (31) can be inserted into the fixing notch (411) after the fixing block (41) moves down.

8. A primary and secondary integrated pole-mounted circuit breaker according to claim 7, characterized in that, The limiting plate (22) has extension blocks (23) fixed on the opposite sides of its lower part, and clearance notches (231) are provided on the sides of the two extension blocks (23) that are far apart from each other. The inner wall of the clearance notch (231) is provided with a support block (24) that can slide horizontally. The outside of the limiting plate (22) is provided with a connector (5) that connects the fixing block (41) and the support block (24). When the fixing block (41) moves down, the connector (5) drives the two support blocks (24) to slide out of the clearance notch (231) in a direction away from each other.

9. A primary and secondary integrated pole-mounted circuit breaker according to claim 8, characterized in that, The connector (5) includes a vertical rod (51) that slides vertically on the side of the support plate facing the extension block (23), and a connecting rod (52) that is rotatably connected at one end to the lower end of the vertical rod (51). A protruding block (412) that is fixedly connected to the upper end of the vertical rod (51) is fixed on the fixing block (41). The other end of the connecting rod (52) is rotatably connected to the top surface of the support block (24).

10. A primary and secondary integrated pole-mounted circuit breaker according to claim 8, characterized in that, The support block (24) has guide protrusions (241) fixed on its two opposite vertical sides, and the inner wall of the clearance notch (231) has a guide groove (232) for the guide protrusions (241) to be inserted and slide back and forth.

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