A pole-mounted circuit breaker with isolated blocking structure

Abstract

This invention discloses a pole-mounted circuit breaker with an isolation and interlocking structure, relating to the field of pole-mounted circuit breaker technology. It includes a circuit breaker body and a disconnecting switch. A slide block is installed on one side of the circuit breaker body, and an interlocking rod is inserted into the circuit breaker body. One end of the interlocking rod passes through the slide block and is linked to the circuit breaker operating mechanism. When the circuit breaker is closed, the interlocking rod extends; when the circuit breaker is open, the interlocking rod retracts. The disconnecting switch also includes a frame fixedly connected to the circuit breaker body. An isolation main shaft is rotatably mounted in the frame, and an interlocking mechanism is eccentrically hinged to the isolation main shaft. The interlocking mechanism slides with the slide block, and one end of the interlocking mechanism abuts against the extended interlocking rod. By setting an interlocking rod connected to the circuit breaker operating mechanism, this invention allows the interlocking rod to extend under the action of the operating mechanism when the circuit breaker is in the closed state, abutting against one end of the interlocking mechanism and restricting the rotational freedom of the interlocking mechanism.

Description

Technical Field

[0001] This invention relates to the field of pole-mounted circuit breaker technology, specifically a pole-mounted circuit breaker with an isolation and locking structure. Background Technology

[0002] Pole-mounted circuit breakers are important control and protection devices in power distribution networks. They are usually used in conjunction with disconnecting switches to achieve safe switching and maintenance isolation of lines. In practical applications, in order to ensure the personal safety of operators and the reliable operation of equipment, a strict anti-misoperation interlocking mechanism must be set between the circuit breaker and the disconnecting switch. That is, the operating sequence must be met: the disconnecting switch can only be opened after the circuit breaker is opened, and the circuit breaker can only be closed after the disconnecting switch is closed.

[0003] To ensure ease of maintenance and safety, a disconnector is usually added to the switch, forming an integrated structure of circuit breaker and disconnector. This structure has a simple interlock between the circuit breaker and the disconnector to ensure that the disconnector is locked after the circuit breaker is closed. However, the existing interlocking structure often lacks an effective rigid positioning and holding mechanism when the disconnector is in the process of opening and adjusting. In the event of pole vibration caused by strong winds outdoors or accidental contact with the operating handle, the circuit breaker may be accidentally closed, seriously threatening the lives of maintenance personnel below. At the same time, the existing interlocking mechanism usually relies only on linkage transmission and lacks a position feedback mechanism. After long-term operation and wear, gaps are easily accumulated between the parts of the interlocking mechanism, resulting in the problem of unreliable interlocking of the interlocking rod. Summary of the Invention

[0004] The purpose of this invention is to provide a pole-mounted circuit breaker with an isolation and interlocking structure to solve the technical problems of insufficient rigidity of the interlocking mechanism and lack of position feedback in the prior art during the disconnection process of the disconnecting switch, which makes it difficult to maintain.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A pole-mounted circuit breaker with an isolation interlocking structure includes a circuit breaker body and a disconnecting switch. A slide block is mounted on one side of the circuit breaker body, and an interlocking rod is inserted into the circuit breaker body. One end of the interlocking rod passes through the slide block and is linked to the circuit breaker operating mechanism. When the circuit breaker is closed, the interlocking rod extends; when the circuit breaker is opened, the interlocking rod retracts. The disconnecting switch also includes a frame fixedly connected to the circuit breaker body. An isolation spindle is rotatably mounted in the frame, and an interlocking mechanism is eccentrically hinged to the isolation spindle. The interlocking mechanism slides with the slide block, and one end of the interlocking mechanism abuts against the extended interlocking top rod. The annular stop structure is installed on one side of the frame and is coaxially arranged with the isolation main shaft. The other end of the interlocking mechanism is equipped with a snap-fit ​​component that cooperates with the annular stop structure. During the opening stroke of the isolation main shaft, the annular stop structure and the snap-fit ​​component engage in a one-way snap-fit. During the closing stroke of the isolation main shaft, the snap-fit ​​component disengages from the snap-fit ​​with the annular stop structure and is constrained by the inner stop surface of the annular stop structure.

[0006] Preferably, the interlocking mechanism includes a drive link, one end of which is eccentrically hinged to the isolation spindle, and the other end is provided with a clearance groove extending along its length direction. A fixed shaft passing through the clearance groove is fixedly connected to the slide.

[0007] Preferably, a cam is fixedly connected to the isolation spindle, a hinge shaft is eccentrically fixed to the cam, the hinge shaft is hinged to one end of the interlocking mechanism, and an isolation operating handle is fixedly connected to one end of the isolation spindle.

[0008] Preferably, a support seat is snapped onto one side of the frame, and a top spring is installed between one end of the support seat and the cam.

[0009] Preferably, the annular stop structure includes a connecting ring slidably sleeved outside the support base, the connecting ring having a plurality of ratchet teeth distributed circumferentially on its edge, and the snap-fit ​​component including a sleeve elastically sleeved on one end of the hinge shaft, with a pawl matching the ratchet teeth fixedly connected to one side of the sleeve.

[0010] Preferably, the inner wall of the connecting ring has a plurality of insert rods distributed in a ring, and the support base has radially distributed through grooves adapted to the insert rods. The insert rods pass through the through grooves and extend into the interior of the support base. An elastic reset member is fixedly connected inside the support base, and the elastic reset member abuts against the outer wall of each insert rod.

[0011] Preferably, a one-way transmission guide ring is sleeved on the isolation spindle. One side of the guide ring has a plurality of guide protrusions that abut against the insert rod. When the insert rod abuts against the guide protrusions, the ratchet is located outside the pawl and forms a stop surface that restricts the pawl at this position.

[0012] Preferably, a wedge-shaped protrusion is elastically inserted into the isolation spindle, and a wedge-shaped groove adapted to the wedge-shaped protrusion is formed on the inner wall of the guide ring.

[0013] Preferably, a torsion spring is installed between the sleeve and the hinge shaft, and a positioning post is fixedly connected to one end of the sleeve. An arc-shaped limiting groove that cooperates with the positioning post is opened on the outer side of the frame.

[0014] Preferably, a plurality of abutment rods are fixedly connected to the side of the connecting ring near the frame, and an annular unlocking seat that abuts and cooperates with each abutment rod is rotatably installed on the inner wall of the frame, and a gripping rod extending out of the frame is fixedly connected to the top of the annular unlocking seat.

[0015] In the above technical solution, by setting an interlocking rod connected to the circuit breaker operating mechanism, when the circuit breaker is in the closed state, the interlocking rod extends under the action of the operating mechanism and abuts against one end of the interlocking mechanism, restricting the rotational freedom of the interlocking mechanism. This prevents the isolating main shaft connected to the interlocking mechanism from rotating, thus physically preventing the disconnecting switch from opening. This fundamentally avoids major safety accidents caused by opening the circuit breaker under load. When the circuit breaker opens and the interlocking rod retracts, the disconnecting switch can perform the opening operation. During the opening stroke of the isolating main shaft, the snap-fit ​​component installed on the interlocking mechanism engages with the annular stop structure on one side of the frame in a one-way snap-fit, which mechanically controls the opening position of the disconnecting switch. The locking mechanism physically blocks the closing rotation path of the disconnecting switch, effectively preventing accidental closing accidents caused by vibration or accidental contact, and greatly improving safety during maintenance. During the switching process from open to closed, as the disconnecting spindle rotates, the annular stop structure shifts relative to the locking member, eventually moving to the outside of the locking member. This restricts the locking member to the inner stop surface of the annular stop structure, ensuring that the disconnecting switch can close smoothly and quickly. It also provides a rapid warning when the interlocking mechanism shifts outward due to wear at the hinge point or loosening of bolts caused by long-term vibration, by utilizing the collision or jamming phenomenon between the locking member and the annular stop structure. This greatly improves the operational reliability of the distribution network.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of a pole-mounted circuit breaker with an isolation and locking structure according to the present invention; Figure 2 This is a schematic diagram of the linkage interlocking mechanism in a pole-mounted circuit breaker with an isolation interlocking structure according to the present invention. Figure 3 This is a schematic diagram showing the cooperation relationship between the annular stop structure and the snap-fit ​​component in a pole-mounted circuit breaker with an isolation and locking structure according to the present invention. Figure 4 This is a partial structural cross-sectional view of a pole-mounted circuit breaker with an isolation and locking structure according to the present invention. Figure 5 In this invention Figure 4 Enlarged view of the structure at point A; Figure 6 This is a schematic diagram of the support base and annular stop structure in a pole-mounted circuit breaker with an isolation and locking structure according to the present invention. Figure 7 This is a schematic diagram of the isolation spindle in a pole-mounted circuit breaker with an isolation locking structure according to the present invention; Figure 8 This is a schematic diagram of the guide ring structure in a pole-mounted circuit breaker with an isolation and locking structure according to the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Circuit breaker body; 11. Slide; 12. Interlocking top rod; 13. Fixed shaft; 2. Disconnecting switch; 21. Frame; 211. Arc-shaped limit groove; 22. Isolating main shaft; 221. Wedge-shaped protrusion; 23. Cam; 24. Hinge shaft; 25. Isolating operating handle; 26. Guide ring; 27. Guide protrusion; 28. Wedge-shaped groove; 3. Interlocking mechanism; 31. Drive linkage; 32. Clearance groove; 4. Annular stop structure; 42. Connecting ring; 43. Ratchet; 44. Insert rod; 45. Abutment rod; 46. Annular unlocking seat; 47. Grip rod; 5. Snap-fit ​​component; 51. Sleeve; 52. Pawl; 53. Torsion spring; 54. Positioning pin; 6. Support seat; 61. Top spring; 62. Through groove; 8. Elastic reset component. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0022] Please see Figures 1-8 This invention provides a pole-mounted circuit breaker with an isolation and interlocking structure, comprising a circuit breaker body 1 and a disconnecting switch 2. A slide block 11 is mounted on one side of the circuit breaker body 1, and an interlocking rod 12 is inserted inside the circuit breaker body 1. One end of the interlocking rod 12 passes through the slide block 11 and is linked to the circuit breaker operating mechanism. When the circuit breaker is closed, the interlocking rod 12 extends; when the circuit breaker is opened, the interlocking rod 12 retracts. The disconnecting switch 2 includes a frame 21 fixedly connected to the circuit breaker body 1. An isolation spindle 22 is rotatably mounted in the frame 21, and an eccentric hinge is mounted on the isolation spindle 22. An interlocking mechanism 3 is provided, which slides with the slide block 11. One end of the interlocking mechanism 3 abuts against the extended interlocking top rod 12. An annular stop structure 4 is installed on one side of the frame 21 and is coaxially arranged with the isolation main shaft 22. The other end of the interlocking mechanism 3 is equipped with a snap-fit ​​part 5 that cooperates with the annular stop structure 4. During the opening stroke of the isolation main shaft 22, the annular stop structure 4 and the snap-fit ​​part 5 are engaged in a one-way snap-fit. During the closing stroke of the isolation main shaft 22, the snap-fit ​​part 5 disengages from the snap-fit ​​with the annular stop structure 4 and is restricted by the inner stop surface of the annular stop structure 4.

[0023] Specifically, the circuit breaker body 1 is the core component for controlling the connection and disconnection of lines in the distribution network. Its operating mechanism drives the interlocking rod 12 to extend and retract linearly along the slide 11 during closing and opening operations. When the circuit breaker body 1 completes the closing operation, the interlocking rod 12 extends, blocking the end of the interlocking mechanism 3 located on the slide 11, restricting its rotation. This prevents the isolating main shaft 22, which is eccentrically connected to the interlocking mechanism 3, from rotating, thus achieving forced interlocking of the isolating switch 2 when the circuit breaker is closed, meeting the requirements for preventing misoperation. When the circuit breaker body 1 opens, the interlocking rod 12 retracts, releasing the rotation restriction on the interlocking mechanism 3. At this time, the isolating main shaft 22 can drive the isolating switch 2 to perform a normal opening operation. When the isolating main shaft 22 moves to the opening position... During rotation, the locking component 5 rotates synchronously with the interlocking mechanism 3, forming a one-way locking with the annular stop structure 4. If the isolating main shaft 22 is affected by external force and rotates back in the closing direction, the locking component 5 will directly lock onto the annular stop structure 4, preventing the isolating main shaft 22 from rotating back and achieving rigid locking of the opening position to avoid the risk of accidental closing. When the isolating switch 2 is closed, the annular stop structure 4 will move to the outside of the locking component 5 first. At this time, the isolating main shaft 22 can rotate smoothly and quickly in the closing direction. The locking component 5 will always correspond to the inner stop surface of the annular stop structure 4. If the interlocking mechanism 3 has a problem of excessive hinge gap or outward displacement due to long-term wear, the locking component 5 will directly collide with the inner stop surface. The operator can detect and maintain and adjust it in time.

[0024] Compared with the prior art, the present invention, by setting an interlocking rod 12 connected to the circuit breaker operating mechanism, allows the interlocking rod 12 to extend under the action of the operating mechanism when the circuit breaker is in the closed state, abutting one end of the interlocking mechanism 3, thus restricting the rotational freedom of the interlocking mechanism 3. This prevents the isolating main shaft 22 connected to the interlocking mechanism 3 from rotating, thereby physically preventing the disconnecting switch 2 from opening, fundamentally avoiding major safety accidents caused by opening the circuit breaker under load. When the circuit breaker opens and the interlocking rod 12 retracts, the disconnecting switch 2 can perform the opening operation. During the opening stroke of the isolating main shaft 22, the snap-fit ​​component 5 installed on the interlocking mechanism 3 will engage with the annular stop structure 4 on one side of the frame 21 in a one-way snap-fit ​​manner, enabling the disconnecting switch 2 to open. The position forms a mechanical lock, physically blocking the closing rotation path of the disconnector switch 2, thereby effectively avoiding accidental closing accidents caused by vibration or accidental contact, and greatly improving the safety during maintenance. During the process of the disconnector switch 2 switching from open to closed, as the disconnector spindle 22 rotates, the annular stop structure 4 is displaced relative to the locking member 5, and eventually moves to the outside of the locking member 5, so that the locking member 5 is restricted by the inner stop surface of the annular stop structure 4. This not only ensures that the disconnector switch 2 can close smoothly and quickly, but also provides a quick warning when the interlocking mechanism 3 is worn at the hinge point and the bolts are loosened due to long-term operation vibration and shifts outward, using the collision or jamming phenomenon generated between the locking member 5 and the annular stop structure 4, which greatly improves the operational reliability of the distribution network.

[0025] In a further embodiment of the present invention, the interlocking mechanism 3 includes a drive link 31. One end of the drive link 31 is eccentrically hinged to the isolation main shaft 22, and the other end has a relief groove 32 extending along its length. A fixed shaft 13 passing through the relief groove 32 is fixedly connected to the slide block 11. Specifically, when the isolation main shaft 22 rotates, the drive link 31 swings around its hinge point with the isolation main shaft 22, and the fixed shaft 13 slides relative to it in the relief groove 32, thereby guiding and limiting the movement trajectory of the drive link 31. When the circuit breaker is closed and the interlocking top rod 12 extends and abuts against the drive link 31, the drive link 31 is restricted from swinging. Since the fixed shaft 13 is located in the relief groove 32, even if the drive link 31 is subjected to external force, it can only move slightly along the length direction of the relief groove 32 and cannot generate a torque sufficient to drive the isolation main shaft 22 to rotate, thereby achieving reliable locking. After the circuit breaker trips and the interlocking rod 12 retracts, the drive link 31 regains its degree of freedom. When the isolation spindle 22 rotates, the fixed shaft 13 slides smoothly in the relief groove 32, which not only ensures the flexibility of movement, but also limits the limit swing angle of the drive link 31 through the cooperation between the fixed shaft 13 and the relief groove 32, preventing excessive deflection that could cause the mechanism to jam.

[0026] In a further embodiment of the present invention, a cam 23 is fixedly connected to the isolating spindle 22, and a hinge shaft 24 is eccentrically fixed to the cam 23. The hinge shaft 24 is hinged to one end of the interlocking mechanism 3. An isolating operating handle 25 is fixedly connected to one end of the isolating spindle 22 for manually operating the opening and closing of the isolating switch 2. The cam 23 rotates synchronously with the isolating spindle 22, driving the interlocking mechanism 3 to move through the hinge shaft 24. Specifically, the rotational motion of the isolating spindle 22 is amplified by the cam 23 and converted into the swing displacement of the interlocking mechanism 3. The eccentrically set hinge shaft 24 allows the cam 23 to drive the interlocking mechanism 3 to generate sufficient stroke at a small rotation angle, thereby effectively cooperating with the interlocking push rod 12 or the annular stop structure 4. The isolating operating handle 25 provides a manual operating lever arm. The operator can drive the isolating spindle 22 and the cam 23 to rotate by pulling the operating handle, realizing the opening and closing operation of the isolating switch 2. The operating torque is small and the feel is clear.

[0027] In a further embodiment of the present invention, a support seat 6 is snapped onto one side of the frame 21, and a top spring 61 is installed between one end of the support seat 6 and the cam 23. Specifically, the elastic force of the top spring 61 can keep the cam 23 in stable contact with the interlocking mechanism 3 during the opening and closing process, avoid failure of the fit due to impact or wear, and improve the smoothness and reliability of the mechanism operation. At the same time, the top spring 61 can also apply force to the support seat 6 to ensure its stability at the moment of opening and closing of the disconnecting switch 2.

[0028] In a further embodiment of the present invention, the annular stop structure 4 includes a connecting ring 42 slidably sleeved outside the support base 6. A plurality of ratchet teeth 43 are distributed circumferentially around the edge of the connecting ring 42. The snap-fit ​​component 5 includes a sleeve 51 elastically sleeved at one end of the hinge shaft 24. A pawl 52 matching the ratchet teeth 43 is fixedly connected to one side of the sleeve 51. Specifically, the plurality of ratchet teeth 43 on the connecting ring 42 are distributed on a local arc segment of its outer circumference. The central angle corresponding to this arc segment is smaller than the angle of rotation of the connecting ring 42 relative to the pawl 52 during the full opening and closing stroke of the disconnecting switch 2. During the opening stroke of the disconnecting switch 2, the disconnecting main shaft 22... The hinge shaft 24 and sleeve 51 are rotated, and the pawl 52 swings accordingly. When the pawl 52 rotates into the arc segment where the ratchet 43 is located, the pawl 52 and the ratchet 43 engage to form a one-way locking, preventing the isolating main shaft 22 from reversing and preventing accidental closing. Since the ratchet 43 is only distributed in a local arc segment, the pawl 52 will not contact the area of ​​the ratchet 43 in the initial stage of the opening and closing stroke of the isolating switch 2, and will not be blocked by it. This ensures that the initial rotation of the isolating main shaft 22 is smooth and will not trigger the locking too early, affecting the operating feel. It also realizes the mechanical self-locking of the opening position, and only takes effect in the critical section, without affecting the normal closing operation.

[0029] In a further embodiment of the present invention, a plurality of insert rods 44 are annularly distributed on the inner wall of the connecting ring 42, and through slots 62 adapted to the insert rods 44 are radially distributed on the support base 6. The insert rods 44 pass through the through slots 62 and extend into the interior of the support base 6. An elastic reset member 8 is fixedly connected inside the support base 6. The elastic reset member 8 abuts against the outer wall of each insert rod 44. The elastic reset member 8 includes a reset spring fixed to the support base 6. A pressure ring is fixedly connected to one end of the reset spring. The pressure ring is coaxial with the isolation spindle 22. Specifically, the insert rods 44 pass through the through slots 62 and extend into the interior of the support base 6, so that the connecting ring 42 can only slide along the axial direction of the support base 6 and cannot rotate relative to it. The cooperation between the insert rods 44 and the through slots 62 realizes the circumferential positioning and axial guidance between the connecting ring 42 and the support base 6. The connecting ring 42 can move along the axial direction of the support base 6, but cannot rotate around the support base 6, ensuring The ratchet 43 on the ring remains in a fixed circumferential position, thus achieving precise engagement with the pawl 52. Meanwhile, the insert rod 44 extends through the through slot 62 into the support base 6. The elastic reset member 8 enhances the structural stability of the connecting ring 42, preventing it from tilting or falling off when impacted by the pawl 52, further improving the reliability of the snap-fit ​​engagement. The elastic reset member 8 continuously applies an inward elastic force to the insert rod 44, keeping the connecting ring 42 in the preset position, ensuring the engagement accuracy of the ratchet 43 and pawl 52 during the opening stroke, and preventing the connecting ring 42 from shifting and failing due to vibration. At the same time, after the isolation spindle 22 completes the operation from opening to closing, the elastic reset member 8 resets the originally outwardly displaced connecting ring 42 back, ensuring that the ratchet 43 on the connecting ring 42 can stably continue to engage with the pawl 52 during the next opening process.

[0030] In a further embodiment of the present invention, a one-way transmission guide ring 26 is sleeved on the isolation spindle 22. One side of the guide ring 26 has a plurality of guide protrusions 27 arranged in a ring to abut against the insertion rod 44. When the insertion rod 44 abuts against the guide protrusions 27, the ratchet 43 is located outside the pawl 52, forming a stop surface that restricts the pawl 52 at this position. Specifically, the guide ring 26 is connected to the isolation spindle 22 through a one-way transmission structure, allowing the isolation spindle 22 to drive the guide ring 26 to rotate synchronously only when the isolation spindle 22 is closed. When the isolation spindle 22 rotates to close the circuit, the guide protrusions 27 on the guide ring 26... 7. Push the insertion rod 44, which in turn drives the connecting ring 42 to move axially, so that the connecting ring 42 and the ratchet 43 move to the outside of the pawl 52 and the ratchet 43 forms a stop surface. At this time, if the interlocking mechanism 3 has a problem of excessive hinge gap and outward displacement due to long-term wear, the snap-fit ​​part 5 will directly collide with the inner stop surface. The operator can find out and maintain and adjust it in time. When rotating in the opening direction, the guide ring 26 rotates freely and does not drive the connecting ring 42 to move axially. The pawl 52 always cooperates with the ratchet 43 on the connecting ring 42 in one direction to ensure that the rigid positioning state can be maintained in time during the opening process.

[0031] In a further embodiment of the present invention, a wedge-shaped protrusion 221 is elastically inserted into the isolation spindle 22, and a wedge-shaped groove 28 adapted to the wedge-shaped protrusion 221 is formed on the inner wall of the guide ring 26. Specifically, the wedge-shaped protrusion 221 is embedded in the wedge-shaped groove 28 under the action of the elastic element, realizing the one-way transmission cooperation between the guide ring 26 and the isolation spindle 22. When the isolation spindle 22 rotates in the opening direction, the wedge-shaped inclined surface of the wedge-shaped protrusion 221 is squeezed by the side wall of the wedge-shaped groove 28, overcoming the elastic force and retracting into the wedge-shaped groove 28, so that the isolation spindle 22 rotates relative to the guide ring 26. The guide ring 26 remains stationary and does not rotate with it, thus preventing the connecting ring 42 from being displaced axially. This ensures that the pawl 52 and ratchet 43 can always be properly engaged and locked during the opening process. When the isolating spindle 22 rotates in the closing direction, the right-angled end face of the wedge-shaped protrusion 221 is engaged in the side wall of the wedge-shaped groove 28, causing the guide ring 26 to rotate synchronously. This, in turn, pushes the insertion rod 44 and the connecting ring 42 to move axially through the guide protrusion 27, completing the unlocking preparation. The structure is simple and reliable, with stable unidirectional transmission. It does not require additional complex transmission components, reducing the difficulty of mechanism processing and assembly.

[0032] In a further embodiment of the present invention, a torsion spring 53 is installed between the sleeve 51 and the hinge shaft 24, and a positioning post 54 is fixedly connected to one end of the sleeve 51. An arc-shaped limiting groove 211 that cooperates with the positioning post 54 is opened on the outer side of the frame 21. The positioning post 54 is inserted into the arc-shaped limiting groove 211 and can slide along it. Specifically, the torsion spring 53 keeps the sleeve 51 and the pawl 52 on it in a preloaded force in the direction of the ratchet 43, ensuring that the pawl 52 and the ratchet 43 can reliably engage and prevent disengagement due to vibration or impact. The arc-shaped limiting groove 211 restricts the movement trajectory of the positioning post 54, thereby limiting the maximum swing range of the sleeve 51 and the pawl 52. This ensures the flexible swing and reliable reset of the pawl 52, and also precisely constrains its movement range, improving the stability and lifespan of the mechanism.

[0033] In a further embodiment of the present invention, a plurality of abutment rods 45 are fixedly connected to the side of the connecting ring 42 near the frame 21. An annular unlocking seat 46, which abuts against each abutment rod 45, is rotatably installed on the inner wall of the frame 21. One side of the annular unlocking seat 46 is provided with a guide groove for the abutment rods 45 to enter. A gripping rod 47 extending out of the frame 21 is fixedly connected to the top of the annular unlocking seat 46. Specifically, when it is necessary to manually force the ratchet 43 to release the lock on the pawl 52, the operator moves the gripping rod 47 to rotate the annular unlocking seat 46. When the annular unlocking seat 46 rotates, the change in the position of its guide groove pushes the abutment rods 45, thereby driving the connecting ring 42 to move axially, so that the ratchet 43 disengages from the meshing position with the pawl 52, releasing the lock on the isolation spindle 22. After the operation is completed, the gripping rod 47 is released, and the connecting ring 42 can be reset under the action of the elastic reset member 8. This manual unlocking mechanism provides redundant protection for emergency situations or special operations, improving the maintainability and safety of the equipment.

[0034] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pole-mounted circuit breaker with an isolation interlocking structure, comprising a circuit breaker body (1) and a disconnecting switch (2), wherein a slide (11) is installed on one side of the circuit breaker body (1), and an interlocking rod (12) is inserted inside the circuit breaker body (1), one end of the interlocking rod (12) passing through the slide (11) and linked with the circuit breaker operating mechanism, wherein the interlocking rod (12) extends when the circuit breaker is closed, and retracts when the circuit breaker is opened, characterized in that, Also includes: The disconnect switch (2) includes a frame (21) fixedly connected to the circuit breaker body (1), an isolation spindle (22) is rotatably mounted in the frame (21), an interlocking mechanism (3) is eccentrically hinged on the isolation spindle (22), the interlocking mechanism (3) is slidably engaged with the slide (11), and one end of the interlocking mechanism (3) abuts against the extended interlocking top rod (12); The annular stop structure (4) is installed on one side of the frame (21) and is coaxially arranged with the isolation spindle (22). The other end of the interlocking mechanism (3) is equipped with a snap-fit ​​part (5) that cooperates with the annular stop structure (4). During the opening stroke of the isolation spindle (22), the annular stop structure (4) and the snap-fit ​​part (5) engage in a one-way snap-fit. During the closing stroke of the isolation spindle (22), the snap-fit ​​part (5) disengages from the snap-fit ​​with the annular stop structure (4) and is restricted by the inner stop surface of the annular stop structure (4).

2. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 1, characterized in that, The interlocking mechanism (3) includes a drive link (31), one end of which is eccentrically hinged to the isolation spindle (22), and the other end is provided with a relief groove (32) extending along its length direction. A fixed shaft (13) passing through the relief groove (32) is fixedly connected to the slide (11).

3. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 1, characterized in that, A cam (23) is fixedly connected to the isolation spindle (22), and a hinge shaft (24) is eccentrically fixed to the cam (23). The hinge shaft (24) is hinged to one end of the interlocking mechanism (3), and an isolation operating handle (25) is fixedly connected to one end of the isolation spindle (22).

4. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 3, characterized in that, A support seat (6) is snapped onto one side of the frame (21), and a top spring (61) is installed between one end of the support seat (6) and the cam (23).

5. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 4, characterized in that, The annular stop structure (4) includes a connecting ring (42) that is slidably sleeved outside the support base (6). The connecting ring (42) has a plurality of ratchet teeth (43) distributed circumferentially on its edge. The snap-fit ​​component (5) includes a sleeve (51) that is elastically sleeved on one end of the hinge shaft (24). A pawl (52) that matches the ratchet teeth (43) is fixedly connected to one side of the sleeve (51).

6. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 5, characterized in that, The inner wall of the connecting ring (42) is provided with a number of insert rods (44) arranged in a ring. The support base (6) is provided with radially distributed through grooves (62) that are adapted to the insert rods (44). The insert rods (44) pass through the through grooves (62) and extend into the support base (6). An elastic reset member (8) is fixedly connected inside the support base (6). The elastic reset member (8) abuts against the outer wall of each insert rod (44).

7. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 6, characterized in that, The isolation spindle (22) is fitted with a one-way transmission guide ring (26). The guide ring (26) has a number of guide protrusions (27) that abut against the outer wall of the insert rod (44) on one side. When the insert rod (44) abuts against the guide protrusions (27), the ratchet (43) is located outside the pawl (52) and forms a stop surface that restricts the pawl (52) at this position.

8. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 7, characterized in that, A wedge-shaped protrusion (221) is elastically inserted into the isolation spindle (22), and a wedge-shaped groove (28) adapted to the wedge-shaped protrusion (221) is opened on the inner wall of the guide ring (26).

9. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 5, characterized in that, A torsion spring (53) is installed between the sleeve (51) and the hinge shaft (24), and a positioning post (54) is fixedly connected to one end of the sleeve (51). An arc-shaped limiting groove (211) that cooperates with the positioning post (54) is opened on the outside of the frame (21).

10. A pole-mounted circuit breaker with an isolation and interlocking structure according to claim 5, characterized in that, The connecting ring (42) has several abutment rods (45) fixedly connected to the side of the frame (21) near the frame. The inner wall of the frame (21) is rotatably installed with an annular unlocking seat (46) that abuts and cooperates with each abutment rod (45). The top of the annular unlocking seat (46) is fixedly connected with a handle (47) that extends out of the frame (21).

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