Modular pole-mounted circuit breaker

Abstract

This invention discloses a modular pole-mounted circuit breaker, relating to the field of circuit breaker technology. It includes an operating housing, a vacuum interrupter fixed to its top, and an insulating rod connected to the bottom end of the moving contact of the vacuum interrupter. The operating housing has an opening on one side. It also includes a detachable operating module, which comprises an energy storage mechanism, a tripping / closing actuator, and a drawer plate. The energy storage mechanism includes a carriage fixed to the drawer plate, two sliding plates slidably connected within the carriage, and two energy storage springs located within the carriage. This solution uses a drawer-type detachable operating module. When inserted, the lifting rod remains vertical, and the F-shaped pliers directly engage the bottom end of the insulating rod, achieving rapid connection and solving the problems of difficult module disassembly and assembly, easy slippage, and drive shaft alignment. In the safety interlock, the round holes of the two shielding rods and the perforated ring of the main shaft are aligned only when the circuit is open and both energy storage springs are released. Only then can the key unlock and the drawer plate be pulled out, forcibly tripping and releasing energy before opening the housing, preventing accidental closing.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically, to a modular pole-mounted circuit breaker. Background Technology

[0002] Pole-mounted circuit breakers are high-voltage switching devices installed on overhead power distribution lines. They are mainly used to break and close load currents and fault currents, playing a crucial role in the safe operation of the power distribution network. Pole-mounted circuit breakers typically include a vacuum interrupter and an operating mechanism. The circuit is opened and closed by the separation or contact of the moving contact and the stationary contact within the vacuum interrupter. The operating mechanism drives the moving contact to move quickly by releasing the energy storage spring. With the development trend of power distribution automation and the integration of primary and secondary circuits, pole-mounted circuit breakers not only need to meet electrical performance requirements, but also need to have higher maintenance convenience and operational safety.

[0003] In existing pole-mounted circuit breakers, the operating mechanism or control box is mostly encapsulated inside the box. During maintenance, the operator needs to hold the operating mechanism or control box with one hand and remove the bolts with the other. The module is prone to tilting and slipping, and the operator's center of gravity is also prone to shift, posing a significant risk of working at height. At the same time, the circuit breaker lacks reliable forced interlocking between the open and closed states. If others misoperate during maintenance, it may cause the circuit breaker to close suddenly, endangering the safety of maintenance personnel.

[0004] To address the above issues, a modular pole-mounted circuit breaker is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a modular pole-mounted circuit breaker is provided, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention can be implemented using the following technical solutions: The present invention provides a modular pole-mounted circuit breaker, including an operating box, a vacuum interrupter fixed on its top, and an insulating rod connected to the bottom end of the moving contact of the vacuum interrupter, with an opening on one side of the operating box; It also includes a detachable operating module, which comprises an energy storage mechanism, a switching actuator, and a drawer plate; The energy storage mechanism includes a slide fixed to the drawer panel, two slide plates slidably connected inside the slide plate, two energy storage springs located inside the slide plate, and a closing crank arm and a closing crank arm rotatably connected to the drawer panel, respectively. The closing crank arm has a first protrusion, and the closing crank arm has a second protrusion. When the closing crank arm rotates, the first protrusion actuates the second protrusion, causing the closing crank arm to rotate. The middle of both the closing and opening crank arms is rotatably connected to a connecting rod, and the two connecting rods pass through the two energy storage springs and are rotatably connected to the slide plates. The opening and closing actuator includes a main shaft rotatably connected to the drawer plate, a short arm connected to the side of the main shaft, a lifting rod rotatably connected to one end of the short arm, and a second bevel gear pair, wherein the two bevel gear bodies of the second bevel gear pair are respectively fixedly mounted to the rotating shaft of the opening crank arm and the main shaft. It also includes a module docking assembly, which includes a connecting rod fixed to the bottom of the insulating rod and an F-shaped duckbill clamp located at the top of the lifting rod. The opening of the F-shaped duckbill clamp faces the insertion direction of the drawer plate. A return spring is provided between the short arm and the lifting rod to keep the lifting rod vertical in the free state so that when the drawer plate is inserted horizontally, the opening of the F-shaped duckbill clamp bites the connecting rod. It also includes a safety interlock assembly, which includes a shielding rod fixed to the side of the two slides away from the energy storage spring, a round hole in the middle of the shielding rod, a crank arm fixed to the main shaft, a perforated ring fixed to the bottom end of the crank arm, a lock body fixed to the drawer plate, and a lock tongue fixed to the inner wall of the operating box. When the drawer panel is inserted into the lock body, the bolt is inserted into the lock body. Only when both energy storage springs are released and the main shaft is in the open return position, the two round holes align with the holes of the perforated ring to form a channel for the key to pass through.

[0007] Furthermore, both the closing and opening crank arms are equipped with a stopper below them to prevent the corresponding crank arms from rotating so that the energy storage spring remains in an energy storage state. Each stopper is slidably connected to a base, and the two bases are fixed to the drawer plate respectively. Each stopper is fitted with a reset spring on its outer lower part to reset the stopper.

[0008] Furthermore, the detachable operating module also includes a release mechanism, which includes a long shaft rotatably connected to the drawer plate, a brake lever fixedly connected to one end of the long shaft, and two release forks driven to rotate by the long shaft. The two release forks are used to press down the corresponding levers to release the corresponding crank arms. A limit fork is also fixedly installed in the middle of the long shaft. Two limit rubber blocks are fixedly connected to the lower sides of the long shaft on the drawer plate. After the limit forks rotate with the long shaft and pass over the limit rubber blocks, they are elastically stopped by the limit rubber blocks, so that the long shaft cannot swing back freely.

[0009] Furthermore, the release mechanism also includes a double-gear transmission pair and a triple-gear transmission pair, which are rotatably connected to the drawer plate. The long shaft drives one release fork through the double-gear transmission pair and another release fork through the triple-gear transmission pair, so that when the opening and closing handles are rotated in different directions, the corresponding levers are pressed down to release the closing crank arm or the opening crank arm.

[0010] Furthermore, the detachable operating module also includes a drive mechanism, which includes a short shaft. One end of the short shaft passes through the drawer plate, and a one-way bearing is fixedly mounted at the point of penetration. The one-way bearing is fixedly mounted on the drawer plate. A second one-way bearing is fixedly mounted at the end of the short shaft extending out of the drawer plate. An energy storage handle is fixedly connected to the outside of the second one-way bearing. A gear is fixedly mounted in the middle of the short shaft. A second gear is rotatably connected inside the drawer plate on one side of the short shaft. The second gear meshes with the first gear. A bevel gear pair is provided between the second gear and the closing crank arm. The two bevel gear bodies of the bevel gear pair are fixedly mounted to the rotating shaft of the second gear and the rotating shaft of the closing crank arm, respectively.

[0011] Furthermore, the safety interlock assembly also includes an unlocking hole on the side wall of the drawer panel. The unlocking hole, two round holes, a ring with holes, and the lock body are arranged coaxially along the insertion direction of the drawer panel. The key passes through the unlocking hole, the two round holes, and the ring with holes in sequence and is then inserted into the lock body. Rotating the key releases the lock tongue from the lock body, thereby allowing the drawer panel to be pulled out.

[0012] Furthermore, the second return spring is a helical spring, set parallel to the lifting rod. Its bottom end is fixedly connected to the middle of the short arm, and its top end is fixedly connected to the protrusion of the lifting rod. It is used to automatically return the lifting rod to the vertical direction when it is not subjected to external force.

[0013] Based on the above, the features and advantages of the modular pole-mounted circuit breaker of the present invention are as follows: This solution integrates the energy storage mechanism, the opening and closing actuator, and the safety interlock assembly onto an open side of the control box with a drawer that can be inserted or removed horizontally, forming a detachable operating module. The energy storage mechanism uses two sliding plates to compress the energy storage spring within the carriage. The closing crank arm rotates by a first protrusion actuating the second protrusion. The second bevel gear transmits the rotation of the opening crank arm to the main shaft, and the short arm drives the lifting rod to move up and down. Finally, the moving contact is opened and closed by the engagement of the F-shaped duckbill clamp with the bottom arm of the insulating rod. When the drawer is inserted horizontally, the second return spring keeps the lifting rod vertical, and the F-shaped duckbill clamp directly engages the arm, completing a quick connection. This eliminates the need for operators to lift the module or repeatedly align it, solving the problems of difficult module disassembly and assembly, easy slippage, and difficulty in accurately aligning the drive shaft in existing technologies.

[0014] In the safety interlocking assembly of this solution, two sliding plates are fixed with shielding rods on the side away from the energy storage springs. A circular hole is opened in the middle of the shielding rod. The main shaft is connected to a perforated ring via a crank arm. Only when both energy storage springs are released and the main shaft is in the open return position, the two circular holes align with the hole in the perforated ring, forming a channel for the key to pass through. After the key passes through the unlocking hole, the two circular holes, and the perforated ring, it is inserted into the lock body. Rotating the key releases the lock tongue from the lock body, allowing the drawer panel to be pulled out. This structure ensures that the circuit breaker is in the open and released state during maintenance, preventing accidental closing. Furthermore, when the key is inserted, the key handle interlocks with the circular holes and the perforated ring, forming a geometric constraint between the structures. This design clarifies that the internal structure of the control box can only be opened for maintenance when the circuit breaker is open and the springs are not storing energy. During maintenance, the geometric constraint between the structures prevents personnel from accidentally activating the open / close handle and the energy storage handle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the modular pole-mounted circuit breaker shown in this invention; Figure 2 This is a schematic diagram of the vacuum interrupter and insulating rod structure of the modular pole-mounted circuit breaker shown in this invention; Figure 3 This is a schematic diagram of the internal structure of the operating box of the modular pole-mounted circuit breaker shown in this invention; Figure 4 for Figure 1 Schematic diagram of the middle part of the structure; Figure 5 for Figure 4 Schematic diagram of the middle section; Figure 6 This is a schematic diagram of the energy storage mechanism and drive mechanism of the modular pole-mounted circuit breaker shown in this invention. Figure 7 for Figure 6 Another perspective view of the middle section structure; Figure 8 This is a schematic diagram of the modular docking assembly structure of the modular pole-mounted circuit breaker shown in this invention; Figure 9 This is a schematic diagram of the limiting rubber block and limiting fork structure of the modular pole-mounted circuit breaker shown in this invention; Figure 10 This is a schematic diagram of the safety interlocking assembly structure of the modular pole-mounted circuit breaker shown in this invention.

[0016] The reference numerals in the appendix of this invention are as follows: 11. Operating box; 12. Vacuum interrupter; 13. Insulating rod; Separable operating modules: 21. Drawer panel; Energy storage mechanism: 221, slide; 222, slide plate; 223, energy storage spring; 224, connecting rod; 225, closing crank arm; 226, opening crank arm; 227, stop; 228, base; 229, return spring one; Drive mechanism: 231, short shaft; 232, one-way bearing 1; 233, gear 1; 234, one-way bearing 2; 235, energy storage handle; 236, gear 2; 237, bevel gear pair 1; Release mechanism: 241, long shaft; 242, opening / closing handle; 243, double gear transmission pair; 244, triple gear transmission pair; 245, release fork; 246, limit rubber block; 247, limit fork; Opening and closing actuator: 251, bevel gear pair 2; 252, main shaft; 253, short arm; 254, lifting rod; Module docking components: 31. F-shaped duckbill pliers; 32. Second return spring; 33. Handle; Safety interlocking components: 41. Cover bar; 42. Round hole; 43. Crank arm; 44. Ring with hole; 45. Unlock hole; 46. Lock body; 47. Lock tongue. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] See Figures 1-10 As shown, an embodiment of the present invention is provided, and a modular pole-mounted circuit breaker will be described in detail below: See Figures 1-5 As shown, a modular pole-mounted circuit breaker includes an operating housing 11, a vacuum interrupter 12 fixed to its top, and an insulating rod 13 connected to the bottom end of the moving contact of the vacuum interrupter 12. The operating housing 11 is typically mounted on a pole. The vacuum interrupter 12 is vertically arranged, and its internal moving contact moves vertically, contacting or separating from the stationary contact. The insulating rod 13 is used to transfer the mechanical energy of the operating mechanism to the moving contact and to achieve electrical isolation between the high-voltage and low-voltage sides; this is prior art and will not be elaborated further. The operating housing 11 has an opening on one side. The opening is located on the side of the operating housing 11, facilitating the horizontal insertion or removal of the detachable operating module.

[0019] It also includes a detachable operating module, which includes an energy storage mechanism, a circuit breaker mechanism, and a drawer plate 21. The drawer plate 21 is an L-shaped plate that serves as the mounting base for the energy storage mechanism, the circuit breaker mechanism, etc., and can be pulled out or pushed in horizontally from the opening on the side of the operating box 11.

[0020] See Figures 6-7 As shown, the energy storage mechanism includes a slide 221 fixed to a drawer plate 21, two sliding plates 222 slidably connected within the slide 221, and two energy storage springs 223 disposed within the slide 221, respectively rotatably connected to a closing crank arm 225 and a opening crank arm 226 on the drawer plate 21. The slide 221 has a frame structure with two parallel slide tracks inside, and the two sliding plates 222 are slidably connected to their respective slide tracks. Each sliding plate 222 abuts against one end of its corresponding energy storage spring 223, and the other end of each energy storage spring 223 abuts against the inner wall of the slide 221. The two energy storage springs 223 are respectively used to drive the closing action and the opening action. The closing crank arm 225 has a first protrusion, and the opening crank arm 226 has a second protrusion. When the closing crank arm 225 rotates, the first protrusion actuates the second protrusion, causing the opening crank arm 226 to rotate. When the closing crank arm 225 rotates, it drives the corresponding slide plate 222 to compress one of the energy storage springs 223 via the connecting rod 224. When the opening crank arm 226 rotates, it drives the other slide plate 222 to compress the other energy storage spring 223 via the connecting rod 224. Since the opening crank arm 226 rotates synchronously by the first protrusion actuating the second protrusion during the rotation of the closing crank arm 225, the release of the closing energy storage spring 223 and the compression of the opening energy storage spring 223 are completed simultaneously during the closing process. It should be noted that, considering the loss of some energy (friction, etc.) and the conversion of some energy into the energy required for the closing action, the elastic potential energy stored in the closing energy storage spring 223 is greater than the potential energy stored in the opening energy storage spring 223. Both the closing crank arm 225 and the opening crank arm 226 are rotatably connected to the middle of the connecting rod 224. The two connecting rods 224 pass through the two energy storage springs 223 and are rotatably connected to the slide plate 222.

[0021] See Figure 5 and Figure 8As shown, the opening and closing actuator includes a main shaft 252 rotatably connected to the drawer plate 21, a short arm 253 connected to the side of the main shaft 252, a lifting rod 254 rotatably connected to one end of the short arm 253, and a second bevel gear pair 251. The main shaft 252 is horizontally arranged above the slide 221, and its two ends are rotatably connected to the drawer plate 21 via bearings. The short arm 253 extends radially along the main shaft 252, and its end is hinged to the bottom end of the lifting rod 254. The two bevel gear bodies of the second bevel gear pair 251 are fixedly fitted to the rotating shaft of the opening crank arm 226 and the main shaft 252, respectively. The second bevel gear pair 251 includes two meshing bevel gears, one of which is fixedly fitted to the rotating shaft of the opening crank arm 226, and the other is fixedly fitted to the main shaft 252. When the tripping crank arm 226 rotates, it drives the main shaft 252 to rotate through the bevel gear pair 251. When the main shaft 252 rotates, the short arm 253 swings around the axis of the main shaft 252, which drives the lifting rod 254 to move up and down in the vertical direction.

[0022] See Figure 8 As shown, the assembly also includes a module docking component, comprising a connecting rod 33 fixed to the bottom of the insulating rod 13 and an F-shaped pliers 31 located at the top of the lifting rod 254. The connecting rod 33 is a horizontally arranged round rod, fixedly connected to the lower end of the insulating rod 13. The opening of the F-shaped pliers 31 faces the insertion direction of the drawer plate 21. A return spring 32 is provided between the short arm 253 and the lifting rod 254 to keep the lifting rod 254 vertical in its free state, so that when the drawer plate 21 is inserted horizontally, the opening of the F-shaped pliers 31 engages with the connecting rod 33. The return spring 32 is a helical spring, arranged parallel to the lifting rod 254, with its bottom end fixedly connected to the middle of the short arm 253 and its top end fixedly connected to the protrusion of the lifting rod 254. When the lifting rod 254 is not subjected to external force, the return spring 32 automatically returns the lifting rod 254 to the vertical direction. During the horizontal insertion of the drawer plate 21 into the operating box 11, the opening of the F-shaped duckbill pliers 31 moves horizontally, gradually engaging the arm 33, and remains vertical under the action of the return spring 32, ensuring accurate and reliable engagement. After engagement, the up-and-down movement of the lifting rod 254 is transmitted to the insulating rod 13 through the cooperation of the F-shaped duckbill pliers 31 and the arm 33. The insulating rod 13 drives the moving contact in the vacuum interrupter 12 to move up and down, realizing the closing or opening of the circuit breaker.

[0023] See Figure 10As shown, it also includes a safety interlock assembly, which includes a shielding rod 41 fixed to the side of each of the two slide plates 222 away from the energy storage spring 223, a circular hole 42 in the middle of the shielding rod 41, a crank arm 43 fixed to the main shaft 252, a perforated ring 44 fixed to the bottom end of the crank arm 43, a lock body 46 fixed to the drawer plate 21, and a locking tongue 47 fixed to the inner wall of the operating box 11. The shielding rod 41 is a long strip rod arranged horizontally, with one end fixed to the slide plate 222 and the other end extending outward. The perforated ring 44 is fixed to the main shaft 252 by the crank arm 43, which is a bent rod, with one end fixedly connected to the main shaft 252 and the other end fixedly connected to the perforated ring 44. When the drawer plate 21 is inserted into place, the locking tongue 47 inserts into the lock body 46, initially preventing the drawer plate 21 from dislodging from the operating box 11. Only when both energy storage springs 223 are released and the main shaft 252 is in the open return position, the two round holes 42 align with the hole of the perforated ring 44 to form a passage for the key to pass through. When both energy storage springs 223 are released, both slides 222 are at the rightmost end of the slide 221, and the round holes 42 of the two blocking rods 41 are aligned; when the main shaft 252 is in the open return position, the perforated ring 44 rotates with the crank arm 43 to a position coaxial with the two round holes 42. At this time, the key is inserted into the unlocking hole 45 on the side wall of the drawer plate 21, and the key passes through one round hole 42, the hole of the perforated ring 44, and the other round hole 42 in sequence, entering the lock body 46. Rotating the key releases the lock tongue 47 from the lock body 46, allowing the drawer plate 21 to be pulled out of the operating box 11. If one of the energy storage springs 223 is in a compressed energy storage state, the end of its corresponding blocking rod 41 will block the path of the key insertion into the lock body 46, thus ensuring that the key can only be inserted when there is no danger inside the operating box 11. When the key is inserted, since the key handle is inserted into the hole 42 and the hole ring 44, the blocking rod 41 or the main shaft 252 cannot move again due to geometric constraints, thereby cutting off the manual operation of opening and closing the circuit and the energy storage operation.

[0024] For further details, please refer to [link / reference]. Figures 6-7 As shown, both the closing crank arm 225 and the opening crank arm 226 are equipped with a stopper 227 below them to prevent the corresponding crank arm from rotating, thus keeping the energy storage spring 223 in an energy-storing state. The stopper 227 is a block-shaped or columnar component, with its upper end extending into the movement trajectory of the corresponding crank arm. When the crank arm rotates to the energy-storing position, the stopper 227 blocks the crank arm, preventing it from rotating back, thus keeping the energy storage spring 223 in a compressed state. A base 228 is slidably connected below each stopper 227, and the two bases 228 are respectively fixed to the drawer plate 21. The stopper 227 can slide vertically relative to the base 228. A return spring 229 is fitted on the lower exterior of each stopper 227 to reset the stopper 227. When the stopper 227 is pressed downwards, the return spring 229 is compressed; when the external force disappears, the return spring 229 pushes the stopper 227 upwards to reset.

[0025] For further details, please refer to [link / reference]. Figure 4 and Figure 5 As shown, the detachable operating module also includes a release mechanism, which includes a long shaft 241 rotatably connected to the drawer plate 21, a brake lever 242 fixedly connected to one end of the long shaft 241, and two release forks 245 driven to rotate by the long shaft 241. The long shaft 241 is horizontally arranged, and its two ends are rotatably connected to the drawer plate 21 via bearings. The brake lever 242 is fixedly connected to one end of the long shaft 241, and the operator rotates the brake lever 242 to drive the long shaft 241 to rotate. The release forks 245 are fixedly connected to the long shaft 241 or a transmission component linked to the long shaft 241. When the long shaft 241 rotates, the two release forks 245 rotate around their respective axes to press down the corresponding levers 227 to release the corresponding crank arms. A limit fork 247 is also fixedly installed in the middle of the long shaft 241, and two limit rubber blocks 246 are fixedly connected to the lower sides of the long shaft 241 on the drawer plate 21. The limit fork 247 is a protrusion extending radially from the long shaft 241 and rotates with the long shaft 241. After the limit fork 247 rotates past the limit rubber block 246, it is elastically stopped by the limit rubber block 246, preventing the long shaft 241 from swinging freely back. This avoids the opening and closing handle 242 from shaking and causing a deviation in the position corresponding to the indicator, thus reducing the workload.

[0026] For further details, please refer to [link / reference]. Figure 9 As shown, the release mechanism also includes a double-gear transmission pair 243 and a triple-gear transmission pair 244, which are rotatably connected to the drawer plate 21. The double-gear transmission pair 243 consists of two meshing gears, and the triple-gear transmission pair 244 consists of three sequentially meshing gears. The long shaft 241 drives one release fork 245 through the double-gear transmission pair 243 and another release fork 245 through the triple-gear transmission pair 244. When the opening and closing handle 242 rotates in different directions, it presses down the corresponding lever 227 to release the closing crank arm 225 or the opening crank arm 226. When the opening / closing handle 242 rotates in one direction, the long shaft 241 drives a release fork 245 to press down the corresponding stop 227 via a double gear transmission pair 243, releasing the closing crank arm 225. When the opening / closing handle 242 rotates in the other direction, the long shaft 241 drives another release fork 245 to press down the corresponding stop 227 via a three gear transmission pair 244, releasing the opening crank arm 226. The specific structure and installation method of this gear transmission pair are existing technology and will not be described in detail here.

[0027] For further details, please refer to [link / reference]. Figure 6As shown, the detachable operating module also includes a drive mechanism, which includes a short shaft 231. One end of the short shaft 231 passes through the drawer plate 21, and a one-way bearing 232 is fixedly mounted at the through point. The one-way bearing 232 is fixedly mounted on the drawer plate 21 to support the short shaft 231 and allow it to rotate in one direction. A second one-way bearing 234 is fixedly mounted on the end of the short shaft 231 extending out of the drawer plate 21. An energy storage handle 235 is fixedly connected to the outside of the second one-way bearing 234. The second one-way bearing 234 restricts the relative rotation direction between the energy storage handle 235 and the short shaft 231, so that the energy storage handle 235 can only drive the short shaft 231 to rotate in the energy storage direction, and slips when rotating in the opposite direction. A gear 233 is fixedly mounted in the middle of the short shaft 231. A gear 236 is rotatably connected to one side of the short shaft 231 inside the drawer plate 21. The gear 236 meshes with the gear 233. A bevel gear pair 237 is provided between the gear 236 and the closing crank arm 225. The two bevel gear bodies of the bevel gear pair 237 are fixedly mounted to the rotation shaft of the gear 236 and the rotation shaft of the closing crank arm 225, respectively. When the operator reciprocates the energy storage handle 235, the energy storage handle 235 drives the short shaft 231 to rotate in one direction through the one-way bearing 234. The short shaft 231 drives the bevel gear pair 237 to rotate through the meshing of the gear 233 and the gear 236. The bevel gear pair 237 drives the closing crank arm 225 to rotate and store energy.

[0028] For further details, please refer to [link / reference]. Figure 10 As shown, the safety interlock assembly also includes an unlocking hole 45 on the side wall of the drawer panel 21. The unlocking hole 45, two round holes 42, a perforated ring 44, and the lock body 46 are arranged coaxially along the insertion direction of the drawer panel 21. After the key is inserted into the unlocking hole 45, it passes through the front round hole 42, the perforated ring 44, and the rear round hole 42 in sequence, and finally enters the lock body 46. After the key passes through the unlocking hole 45, the two round holes 42, and the perforated ring 44 in sequence, it is inserted into the lock body 46. Rotating the key releases the lock tongue 47 from the lock body 46, thereby allowing the drawer panel 21 to be pulled out. When the lock tongue 47 retracts, the drawer panel 21 is unlocked from the operating box 11, and the drawer panel 21 can be pulled out horizontally from the operating box 11. It should be noted that the key should be adapted, mainly by adding an extension handle, so that the key can pass through the numerous structures and reach into the interior of the operating box 11 to unlock.

[0029] Furthermore, the second return spring 32 is a helical spring, arranged parallel to the lifting rod 254. Its bottom end is fixedly connected to the middle of the short arm 253, and its top end is fixedly connected to the protrusion of the lifting rod 254. It is used to automatically return the lifting rod 254 to the vertical direction when no external force is applied. When the lifting rod 254 deviates from the vertical direction as the short arm 253 swings, the second return spring 32 is stretched or compressed, accumulating elastic potential energy. When the external force disappears, the second return spring 32 releases the elastic potential energy, pulling the lifting rod 254 back to the vertical state.

[0030] Working principle: During the energy storage phase, the operator repeatedly operates the energy storage handle 235, which drives the short shaft 231 to rotate in one direction via the one-way bearing 234. Gear 233 on the short shaft 231 meshes with gear 236, which in turn drives the closing crank arm 225 to rotate via the bevel gear pair 237. As the closing crank arm 225 rotates, it drives the corresponding slide plate 222 to slide within the carriage 221 via the connecting rod 224, compressing the closing energy storage spring 223. When the closing crank arm 225 rotates to the energy storage position, the stop 227 below the closing crank arm 225 pops upward under the action of the return spring 229, preventing the closing crank arm 225 from rotating back and keeping the closing energy storage spring 223 compressed.

[0031] During the closing phase, the operator rotates the long shaft 241 via the opening / closing handle 242. The long shaft 241, through the double gear transmission pair 243, drives the corresponding release fork 245 to press down the stop 227 below the closing crank arm 225. After the stop 227 moves down, the closing crank arm 225 is unobstructed, and the closing energy storage spring 223 releases its elastic potential energy, pushing the slide plate 222 to slide in the opposite direction. The slide plate 222 drives the closing crank arm 225 to rotate rapidly via the connecting rod 224. When the closing crank arm 225 rotates, it drives the second protrusion through the first protrusion to rotate the opening crank arm 226. When the opening crank arm 226 rotates, on the one hand, it drives the corresponding slide plate 222 through the connecting rod 224 to compress the opening energy storage spring 223, realizing the accumulation of opening mechanical energy; on the other hand, it drives the main shaft 252 to rotate through the bevel gear pair 251. When the main shaft 252 rotates, the short arm 253 swings around the axis of the main shaft 252, driving the lifting rod 254 to move upward. The F-shaped duckbill clamp 31 at the upper end of the lifting rod 254 pushes the insulating rod 13 upward through the connecting rod 33. The insulating rod 13 pushes the moving contact upward and makes contact with the stationary contact to complete the closing.

[0032] After the tripping crank arm 226 is driven to rotate to the designated position, the crank arm is locked by the corresponding stop 227 below it, so that the corresponding energy storage spring 223 is in a compressed energy storage state. At the same time, when the tripping crank arm 226 stops rotating, the main shaft 252 also stops rotating synchronously, and the closing action is just in place.

[0033] During the opening phase, the operator rotates the long shaft 241 in the opposite direction using the opening / closing handle 242. The long shaft 241, through the three-gear transmission pair 244, drives the corresponding release fork 245 to press down the stop 227 below the opening crank arm 226. After the stop 227 moves down, the opening crank arm 226 is unobstructed, and the opening energy storage spring 223 releases its elastic potential energy, pushing the corresponding slide plate 222 to slide in the opposite direction. The slide plate 222 drives the opening crank arm 226 to rotate rapidly through the connecting rod 224. When the opening crank arm 226 rotates, it drives the main shaft 252 to rotate in the opposite direction through the bevel gear pair 251. When the main shaft 252 rotates in the opposite direction, the short arm 253 swings in the opposite direction, driving the lifting rod 254 to move downward. The F-shaped duckbill clamp 31 at the upper end of the lifting rod 254 pulls the insulating rod 13 downward through the bit 33. The insulating rod 13 drives the moving contact downward, separating it from the stationary contact, thus completing the opening.

[0034] During the maintenance unlocking phase, when the circuit breaker is in the open position and both energy storage springs 223 are released, both slide plates 222 are at the rightmost end of the carriage 221, and the round holes 42 of the two shielding rods 41 are aligned. Simultaneously, the main shaft 252 is in the open return position, and the perforated ring 44 rotates with the crank arm 43 to a position coaxial with the two round holes 42. At this time, the two round holes 42 and the hole of the perforated ring 44 are aligned to form a passage for the key. The operator inserts the key through the unlocking hole 45 on the side wall of the drawer plate 21. The key passes through one round hole 42, the hole of the perforated ring 44, and the other round hole 42 in sequence, entering the lock body 46. Rotating the key releases the lock tongue 47 from the lock body 46, causing the lock tongue 47 to retract, unlocking the drawer plate 21 from the operating box 11. The drawer plate 21 can then be pulled out horizontally from the operating box 11.

[0035] When drawer panel 21 is pushed in, the lifting rod 254 remains vertical under the action of the return spring 32, and the opening of the F-shaped duckbill pliers 31 moves horizontally, directly biting the latch 33 at the bottom of the insulating rod 13 to complete the quick connection. After drawer panel 21 is pushed in, the locking tongue 47 automatically inserts into the lock body 46, initially locking the position of drawer panel 21. At this time, since drawer panel 21 has not been unlocked by the key, drawer panel 21 cannot be pulled out from the operating box 11.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular pole-mounted circuit breaker, comprising an operating housing, a vacuum interrupter fixed to its top, and an insulating rod connected to the bottom end of the moving contact of the vacuum interrupter, characterized in that: The control box has an opening on one side; It also includes a detachable operating module, which comprises an energy storage mechanism, a switching actuator, and a drawer plate; The energy storage mechanism includes a slide fixed to the drawer panel, two slide plates slidably connected inside the slide plate, two energy storage springs located inside the slide plate, and a closing crank arm and a closing crank arm rotatably connected to the drawer panel, respectively. The closing crank arm has a first protrusion, and the closing crank arm has a second protrusion. When the closing crank arm rotates, the first protrusion actuates the second protrusion, causing the closing crank arm to rotate. The middle of both the closing and opening crank arms is rotatably connected to a connecting rod, and the two connecting rods pass through the two energy storage springs and are rotatably connected to the slide plates. The opening and closing actuator includes a main shaft rotatably connected to the drawer plate, a short arm connected to the side of the main shaft, a lifting rod rotatably connected to one end of the short arm, and a second bevel gear pair, wherein the two bevel gear bodies of the second bevel gear pair are respectively fixedly mounted to the rotating shaft of the opening crank arm and the main shaft. It also includes a module docking assembly, which includes a connecting rod fixed to the bottom of the insulating rod and an F-shaped duckbill clamp located at the top of the lifting rod. The opening of the F-shaped duckbill clamp faces the insertion direction of the drawer plate. A return spring is provided between the short arm and the lifting rod to keep the lifting rod vertical in the free state so that when the drawer plate is inserted horizontally, the opening of the F-shaped duckbill clamp bites the connecting rod. It also includes a safety interlock assembly, which includes a shielding rod fixed to the side of the two slides away from the energy storage spring, a round hole in the middle of the shielding rod, a crank arm fixed to the main shaft, a perforated ring fixed to the bottom end of the crank arm, a lock body fixed to the drawer plate, and a lock tongue fixed to the inner wall of the operating box. When the drawer panel is inserted into the lock body, the bolt is inserted into the lock body. Only when both energy storage springs are released and the main shaft is in the open return position, the two round holes align with the holes of the perforated ring to form a channel for the key to pass through.

2. A modular pole-mounted circuit breaker according to claim 1, characterized in that: Both the closing and opening crank arms are equipped with a stopper below them to prevent the corresponding crank arms from rotating so that the energy storage spring remains in an energy storage state. Each stopper is slidably connected to a base, and the two bases are fixed to the drawer plate respectively. Each stopper is fitted with a reset spring on its outer lower part to reset the stopper.

3. A modular pole-mounted circuit breaker according to claim 2, characterized in that: The detachable operating module also includes a release mechanism, which includes a long shaft rotatably connected to the drawer plate, a brake lever fixedly connected to one end of the long shaft, and two release forks that are driven to rotate by the long shaft. The two release forks are used to press down the corresponding levers to release the corresponding crank arms. A limit fork is also fixedly installed in the middle of the long shaft. Two limit rubber blocks are fixedly connected to the lower sides of the long shaft on the drawer plate. After the limit forks rotate with the long shaft and pass over the limit rubber blocks, they are elastically stopped by the limit rubber blocks, so that the long shaft cannot swing back freely.

4. A modular pole-mounted circuit breaker according to claim 3, characterized in that: The release mechanism also includes a double-gear transmission pair and a triple-gear transmission pair, which are rotatably connected to the drawer plate. The long shaft drives one release fork through the double-gear transmission pair and another release fork through the triple-gear transmission pair. When the opening and closing handles are rotated in different directions, the corresponding levers are pressed down to release the closing crank arm or the opening crank arm.

5. A modular pole-mounted circuit breaker according to claim 1, characterized in that: The detachable operating module also includes a drive mechanism, which includes a short shaft. One end of the short shaft passes through the drawer plate, and a one-way bearing is fixedly mounted at the point of penetration. The one-way bearing is fixedly mounted on the drawer plate. A second one-way bearing is fixedly mounted at the end of the short shaft that extends out of the drawer plate. An energy storage handle is fixedly connected to the outside of the second one-way bearing. A gear is fixedly mounted in the middle of the short shaft. A second gear is rotatably connected inside the drawer plate to one side of the short shaft. The second gear meshes with the first gear. A bevel gear pair is provided between the second gear and the closing crank arm. The two bevel gear bodies of the bevel gear pair are fixedly mounted to the rotating shaft of the second gear and the rotating shaft of the closing crank arm, respectively.

6. A modular pole-mounted circuit breaker according to claim 1, characterized in that: The safety interlock assembly also includes an unlocking hole on the side wall of the drawer panel. The unlocking hole, two round holes, a ring with holes, and the lock body are arranged coaxially along the insertion direction of the drawer panel. The key passes through the unlocking hole, the two round holes, and the ring with holes in sequence and is then inserted into the lock body. Rotating the key releases the lock tongue from the lock body, thereby allowing the drawer panel to be pulled out.

7. A modular pole-mounted circuit breaker according to claim 1, characterized in that: The second return spring is a helical spring, set parallel to the lifting rod. Its bottom end is fixedly connected to the middle of the short arm, and its top end is fixedly connected to the protrusion of the lifting rod. It is used to automatically return the lifting rod to the vertical direction when it is not subjected to external force.

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