A built-in isolating switch type pole circuit breaker

Abstract

The application discloses a built-in isolating switch type pole circuit breaker and relates to the technical field of pole circuit breakers. The built-in isolating switch type pole circuit breaker comprises a box body, an insulating chamber independently arranged on the left and right sides in the box body, power input ends and load output ends arranged on the left and right sides of the box body respectively, and an isolating switch assembly arranged in the left insulating chamber and comprising movable contact knives arranged on the left and right sides in cooperation. When the movable contact knives are closed, the movable contact knives on the left and right sides are in contact with and conductively connected with each other. When the movable contact knives are opened, the movable contact knives on the left and right sides can be simultaneously rotated counterclockwise to quickly separate from each other and form an obvious electrical isolation gap. The movable contact knife structure arranged in a manner of being synchronously rotated counterclockwise and moving away from each other during the opening process can multiply the separation distance between the two movable contact knives in the same time, accelerates the establishment process of the electrical gap, and thus significantly improves the opening speed and isolation efficiency.

Description

Technical Field

[0001] This invention relates to the field of pole-mounted circuit breaker technology, specifically a pole-mounted circuit breaker with a built-in disconnecting switch. Background Technology

[0002] A pole-mounted circuit breaker with a built-in disconnector is an outdoor power distribution device that integrates a vacuum circuit breaker and a disconnector into a single sealed enclosure. It is mainly used for the protection and control of power distribution network lines. Its core design goal is to solve the corrosion and flashover problems of traditional external disconnectors by integrating the isolation switch, while also achieving mechanical linkage between the circuit breaker and the disconnector to meet functional requirements such as fast reclosing.

[0003] However, existing pole-mounted circuit breakers with built-in disconnect switches still have the following problems: 1. Traditional disconnecting switch components typically use a single moving contact rotating relative to a fixed stationary contact to connect and disconnect the circuit. This structure has many limitations in practical applications. First, during the rotation of the moving contact, the contact point between it and the stationary contact does not change uniformly, resulting in a slow increase in the electrical clearance between them in the initial stage of opening. Furthermore, there is a phenomenon of "local contact" in the movement trajectory. This unstable distance change not only prolongs the duration of the electric arc but also easily causes local high-temperature erosion, affecting the life of the contact.

[0004] 2. In addition, in the traditional circuit breaker assembly opening structure, if the moving contact is only pushed by a single-direction pushing element to apply separation force, in actual operation, the contact surface between the moving contact and the stationary contact may not be able to achieve uniform and synchronous separation due to the influence of electromagnetic force. This results in the current channel not being completely cut off, forming a residual conductive path, which affects the overall disconnection effect of the circuit and may even cause abnormal arc or partial discharge. At the same time, this asynchronous and incomplete separation process will also make it difficult for the arc extinguishing device to suppress the arc in a timely and effective manner, reducing the arc extinguishing efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pole-mounted circuit breaker with a built-in disconnecting switch, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pole-mounted circuit breaker with a built-in disconnector, comprising: a housing, wherein the housing has independent left and right insulating chambers, and power input and load output terminals are respectively provided on the left and right sides of the housing; a disconnector assembly, wherein the disconnector assembly is located in the left insulating chamber and includes moving contacts arranged on the left and right sides, wherein when the circuit is closed, the moving contacts on the left and right sides contact each other and are electrically connected, and when the circuit is opened, the moving contacts on the left and right sides can rotate counterclockwise simultaneously, quickly separating from each other and forming a clear electrical isolation gap; a circuit breaker assembly, wherein the circuit breaker assembly is located in the right insulating chamber and includes a moving contact and a stationary contact, wherein the moving contact can move left and right along the circuit breaker body, and the stationary contact is located in the circuit breaker body and cooperates with the moving contact to realize the connection and disconnection of the circuit; and a pressing plate, wherein the pressing plate is distributed above and below the moving contact and slides vertically with the circuit breaker body, and the upper and lower pressing plates can move towards each other to isolate the moving contact and the stationary contact, thereby realizing the safe separation of the moving contact and the stationary contact.

[0007] Furthermore, the power input terminal and the load output terminal are respectively provided with input terminals and output terminals. The moving contact blade on the left is hinged to the right end of the input terminal, and the moving contact blade on the right is hinged to the left end of the conductive post. Push rods are installed at the upper ends of the hinge points of the left and right moving contact blades. Push rods have push grooves at their upper ends. The left and right push rods are connected by a crossbar. The left and right ends of the crossbar are slidably engaged with the corresponding push grooves by pins. A vertical rod is installed at the upper end of the crossbar.

[0008] Furthermore, the extrusion plate has two mounting slots distributed front and back on the left side. A wedge-shaped push plate is slidably arranged in the mounting slot. A mounting rod that slides up and down with the wedge-shaped push plate is installed in the mounting slot. A support spring sleeved on the mounting rod is connected between the mounting slot and the wedge-shaped push plate. A support plate is connected between the front and back wedge-shaped push plates.

[0009] Furthermore, a control rod is installed on the side of the support plate away from the extrusion plate, which slides vertically with the circuit breaker body. The end of the control rod away from the support rod is tilted to the left. A triangular block is provided on the right side of the control rod. The inclined surface of the triangular block slides with the inclined surface of the control rod. A movable frame is connected between the upper and lower opposing triangular blocks. The lower end of the movable frame slides horizontally with the box. An elastic telescopic column fixedly connected to the box is provided on the right side of the lower triangular block.

[0010] Furthermore, the stationary contact is installed on the left end of the output pole, the circuit breaker body is fixedly mounted on the output pole, a second conductive post is installed on the left end of the moving contact, a conductive sleeve fixedly connected to the housing is provided between the left and right insulating chambers, a conductive disk that slides left and right with the conductive sleeve is installed on the left end of the second conductive post, a conductive rod that slides left and right with the conductive sleeve is installed on the left end of the conductive disk, a connecting spring sleeved on the outside of the conductive rod is connected between the conductive disk and the left inner wall of the conductive sleeve, and the left end of the conductive rod slides left and right with the first conductive post.

[0011] Furthermore, the right end of the moving contact is provided with a protrusion that engages with the stationary contact, and the side of the extrusion plate near the moving contact is provided with a slot that engages with the protrusion.

[0012] Furthermore, a slide bar is installed on the right side of the vertical rod and the triangular block respectively. A cam is provided on the right side of the slide bar. A side groove is opened on the outer side of the cam to slide with the slide bar. A roller is rotatably installed on the outer side of the slide bar to roll in contact with the side groove. The front and rear opposite cams are installed on the same rotating shaft.

[0013] Furthermore, a fixed plate is installed inside the housing and is rotatably connected to the rotating shaft. A ratchet is installed after the rotating shaft passes through the fixed plate. An extension plate is provided on the inner side of the ratchet and is fixedly connected to the fixed plate. A sliding block is slidably installed on the extension plate. The upper end of the sliding block is hinged to a ratchet tooth that cooperates with the ratchet through a torsion spring shaft.

[0014] Furthermore, a control plate is installed on the front side of the sliding block, a sliding column is installed at the lower end of the control plate, and a spiral groove is opened on the outer side of the rotating shaft to slide with the sliding column; a rotating column is rotatably installed at the front end of the ratchet, a fixing strip is installed on the outer side of the rotating column, and a semi-annular groove is opened on the ratchet to rotate with the fixing strip.

[0015] Furthermore, a pulley is installed at the front end of the rotating column, and the left and right pulleys are connected by belt drive. A control shaft that is rotatably connected to the housing is installed at the front end of the pulley on the left side.

[0016] The present invention has the following beneficial effects: (1) The built-in disconnecting switch type pole-mounted circuit breaker has two moving contact blades that can rotate counterclockwise synchronously in a way that keeps them away from each other during the opening process. Compared with the traditional opening structure that relies on the movement of a single moving contact blade relative to a fixed stationary contact blade, this design can increase the separation distance between the two moving contact blades by several times in the same time, thereby significantly improving the opening speed and isolation efficiency. The structure of the double moving contact blades moving in opposite directions not only speeds up the process of establishing the electrical clearance, but also effectively reduces the duration of the electric arc during the opening process, improving the safety and reliability of the operation. In addition, this structure helps to reduce the wear of the contact blade material, extend the service life of the equipment, and still ensure good break insulation performance under high voltage or high current conditions, further ensuring the stability of the system operation.

[0017] (2) The pole-mounted circuit breaker with built-in disconnecting switch applies force to the moving contact from both the top and bottom directions by setting a pressing plate, which is inserted between the moving contact and the stationary contact to push it away from the stationary contact, so that the moving contact is subjected to balanced force on the vertical plane. This avoids the uneven force on the stationary contact or the deflection, shaking and other unstable phenomena caused by applying a pushing force from only one side. This not only improves the response speed and reliability of the tripping action, but also ensures that the contact surface between the moving contact and the stationary contact is quickly separated and evenly pulled apart to form a uniform and stable electrical gap, thereby improving the arc extinguishing efficiency and enhancing the circuit breaker's breaking capacity under high current or high voltage conditions.

[0018] (3) The built-in disconnecting switch type pole-mounted circuit breaker, by setting a wedge-shaped push plate, forces the moving contact to move further away from the stationary contact, thereby increasing the safety distance between the moving contact and the stationary contact on the original basis. This structural design not only realizes the multi-stage push separation mechanism between the moving contact and the stationary contact, improving the stability of the break and the arc extinguishing efficiency during the opening process, but also effectively prevents the problem of disconnection failure caused by the springback of the moving contact or the reignition of the arc.

[0019] (4) The built-in disconnector type pole-mounted circuit breaker adopts a double cam drive structure. By setting left and right cams with different motion states, the timing of the action of the disconnector assembly and the circuit breaker assembly during the opening and closing process is controlled respectively, so as to realize the orderly linkage operation between the two. This double cam structure design can not only effectively avoid the problems of asynchronous action, jamming or delayed response caused by mechanical wear, assembly error and other factors in the traditional rocker transmission mechanism, but also apply a controllable drive path to key components during the opening and closing process. In addition, the double cam structure has good motion transition characteristics during the action conversion process, which can provide a buffering effect at the moment of contact or separation between the moving contact and the stationary contact, reduce the impact force, and improve the stability and reliability of the overall operation.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A schematic diagram of a half-section planar structure; Figure 3 This is a cross-sectional view of the box structure in this invention; Figure 4 This is a schematic diagram of the structure of the disconnector assembly, conductive sleeve, and circuit breaker assembly in this invention; Figure 5This is a cross-sectional view of the disconnector assembly in this invention; Figure 6 For the present invention Figure 5 Enlarged view of region A in the middle; Figure 7 This is a cross-sectional view of the conductive sleeve in this invention. Figure 8 This is a cross-sectional view of the circuit breaker body of the present invention. Figure 9 This is a partial cross-sectional view of the circuit breaker assembly of the present invention; Figure 10 This is a cross-sectional view of the moving contact and the stationary contact in this invention. Figure 11 This is a schematic diagram of the structure of the belt, pulley and rotating column in this invention; Figure 12 This is a schematic diagram of the ratchet and ratchet teeth in this invention; Figure 13 This is a schematic diagram of the structure of the fixing strip and the semi-annular groove in this invention.

[0022] In the diagram, 1. Housing; 2. Insulating chamber; 21. Zero-sequence current transformer; 211. Input terminal; 212. Output terminal; 213. Moving contact; 214. Conductive post one; 215. Push rod; 216. Pushing groove; 217. Horizontal bar; 218. Vertical bar; 22. Current transformer; 221. Moving contact; 222. Stationary contact; 223. Conductive post two; 224. Conductive sleeve; 225. Conductive disk; 226. Conductive rod; 227. Connecting spring; 228. Extrusion plate; 229. Slot; 230. Mounting slot; 231. Wedge-shaped push plate; 232. Mounting rod; 233. 234. Support spring; 235. Support plate; 236. Control rod; 237. Triangular block; 238. Moving frame; 239. Elastic telescopic column; 240. Slide bar; 241. Cam; 242. Side groove; 243. Roller; 244. Rotating shaft; 245. Fixed plate; 246. Ratchet; 247. Extension plate; 248. Sliding block; 249. Ratchet; 250. Control plate; 251. Slide column; 252. Helical groove; 253. Rotating column; 254. Fixed bar; 255. Semi-annular groove; 256. Pulley; 257. Belt; 3. Gas maintaining device; 31. Inflation pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0025] The following is based on Figures 1-13 This invention describes a pole-mounted circuit breaker with a built-in disconnector provided in an embodiment of the present invention.

[0026] Please see Figures 1-4 This pole-mounted circuit breaker with built-in disconnector includes a housing 1. Housing 1 has an integrally sealed structure and is filled with atmospheric pressure sulfur hexafluoride gas or other high-performance gaseous media to create a stable electrical insulation and arc-extinguishing environment. The housing 1 contains left and right independent insulating chambers 2, each equipped with a zero-sequence current transformer 21 and a current transformer 22. The zero-sequence current transformer 21 detects the zero-sequence current to achieve ground fault protection, while the current transformer 22 proportionally converts the large current in the main circuit into a standard small current signal. For line monitoring and protection control; the insulating chamber 2 is made of high-strength composite insulating material to enhance the insulation between phases and to ground, and to provide physical protection for the internal conductive components. The left and right sides of the enclosure 1 are respectively provided with a power input terminal and a load output terminal. The power input terminal is used to connect to the input line, and the load output terminal is used to output to downstream power equipment. The two are connected in a controllable manner through a conductive path set in the insulating chamber 2. The power input terminal and the load output terminal are respectively provided with an input pole 211 and an output pole 212.

[0027] Please see Figure 3 and Figure 4 It should be noted that, in order to ensure the stable and uniform concentration of sulfur hexafluoride gas or other high-performance insulating gas filled in the enclosure 1 and its left and right insulating chambers 2, thereby continuously maintaining good insulation performance and arc extinguishing capability, multiple sets of gas filling pipes 31 are installed in the enclosure 1. The gas filling pipes 31 are reasonably arranged along the internal space of the enclosure 1 to form a multi-point gas supply structure, which helps the gas to quickly and evenly fill the entire enclosure 1 and each insulating chamber 2, avoiding problems such as insulation failure or arc abnormality caused by local gas thinning. In addition, a gas maintenance device 3 of the prior art is installed in the enclosure 1. This device is connected to the gas filling pipes 31 and has the functions of gas pressure monitoring, replenishment and circulation purification. It can detect the gas concentration change in the enclosure 1 in real time and automatically start the gas replenishment program when the gas concentration is lower than the set threshold to maintain the stability and reliability of the gas environment in the enclosure 1.

[0028] Please see Figure 2 , Figure 4 and Figure 5 The insulating chamber 2 on the left side houses a disconnecting switch assembly. This assembly forms a clear isolation point when the circuit is disconnected, isolating the power supply. It includes two moving contacts 213 arranged in a coordinated manner. The left moving contact 213 is hinged to the right end of the input terminal 211 via a torsion spring, while the right moving contact 213 is hinged to the left end of the conductive terminal 214 via another torsion spring. The torsion springs cause the left and right moving contacts 213 to always have a tendency to rotate inwards and move closer to each other, thereby increasing the contact pressure between the moving contacts 213 in the closed position and improving the circuit isolation. To improve conductivity and connection reliability, the two form a complete conductive path when the circuit is closed. The housing 1 is also equipped with an insulating bracket to support the left and right moving contact blades 213. When the circuit is closed, the left and right moving contact blades 213 approach each other and make close contact to form a low-resistance conductive path to ensure stable current transmission. During the circuit is opened, the left and right moving contact blades 213 need to overcome the elastic force of the torsion spring rod and rotate counterclockwise around their respective hinge points to quickly break off the contact and open a sufficient air gap, thereby forming a clear and visible electrical isolation break in the main circuit.

[0029] During the above process, the two moving contacts 213 rotate counterclockwise synchronously in a way that moves away from each other during the opening process. Compared with the traditional opening structure that relies on the movement of a single moving contact 213 relative to a fixed stationary contact, this design can increase the separation distance between the two moving contacts 213 by several times in the same amount of time, thereby significantly improving the opening speed and isolation efficiency. Through the structure of the double moving contacts 213 moving in opposite directions, not only is the process of establishing the electrical clearance accelerated, but the duration of the arc during the opening process is also effectively reduced, improving the safety and reliability of the operation. In addition, this structure helps to reduce the wear of the contact material, extend the service life of the equipment, and still ensure good break insulation performance under high voltage or high current conditions, further ensuring the stability of the system operation.

[0030] Please see Figure 2 and Figures 8-10Additionally, a circuit breaker assembly is installed in the insulating chamber 2 on the right side. This assembly serves as the core execution unit for circuit control and protection, and is suitable for reliably connecting or disconnecting the current under normal operating conditions and fault conditions, thereby achieving effective protection and orderly control of the power system. It includes a moving contact 221 and a stationary contact 222. The moving contact 221 can move left and right along the circuit breaker body, which is fixedly mounted on the output pole 212. The stationary contact 222 is located inside the circuit breaker body and connected to the output pole 212. It is used to provide a stable current flow path in the closed state. When the moving contact 221 moves towards and contacts the stationary contact 222, a low-resistance conductive path is formed between them, realizing the closure of the circuit. During the opening process, the moving contact 221 quickly disengages from the stationary contact 222, cutting off the current flow, thereby realizing the effective disconnection of the circuit.

[0031] Please see Figure 2 , Figure 4 , Figure 5 and Figures 7-9 To achieve electrical connection between the disconnector assembly and the circuit breaker assembly and ensure a stable current transmission path under different operating conditions, a conductive post 223 is fixedly installed on the left end of the moving contact 221, and a conductive sleeve 224 fixedly connected to the housing 1 is provided between the left and right insulating chambers 2. A conductive disk 225 is installed on the left end of the conductive post 223, which slides and engages with the conductive sleeve 224 to achieve dynamic connection of the conductive path. A conductive rod 226 is installed on the left end of the conductive disk 225, which slides and engages with the conductive sleeve 224. The left end of the conductive rod 226 forms a sliding connection with the conductive post 214 on its right side, thereby constructing a complete conductive circuit from the circuit breaker assembly to the disconnector assembly. A connecting spring 227 is connected between the conductive disk 225 and the inner left wall of the conductive sleeve 224 and sleeved on the outside of the conductive rod 226. The connecting spring 227 serves as a reset and pressure maintaining element, providing constant elastic support force during opening and closing to ensure good contact between the conductive components.

[0032] When the closing operation is performed, the moving contact 221 moves to the right and fits tightly against the stationary contact 222, forming the main circuit path. At the same time, the second conductive post 223 pushes the conductive disk 225 and the conductive rod 226 to the right, causing them to move synchronously to the right within the conductive sleeve 224. At this time, the connecting spring 227 is in a naturally extended state, which does not affect the establishment of the conductive path. During the opening operation, the moving contact 221 moves to the left and disengages from the stationary contact 222. The second conductive post 223 moves to the left along with the moving contact 221, causing the conductive disk 225 and the conductive rod 226 to move synchronously to the left, compressing the connecting spring 227 and storing a certain amount of reset potential energy. Although the length of the conductive path changes, the conductive rod 226 always maintains a sliding fit with the first conductive post 214, ensuring the continuity and stability of the circuit during the dynamic process.

[0033] Please see Figure 2 , Figure 4 and Figure 5 To achieve synchronous rotation of the left and right moving contact blades 213 during closing and opening processes, and to ensure good coordination and stability when connecting or disconnecting the circuit, push rods 215 are installed at the upper ends of the hinge points of both left and right moving contact blades 213. These push rods 215 effectively transmit external operating force to the moving contact blades 213, causing them to rotate around the hinge axis. A push groove 216 is provided at the upper end of the push rod 215, extending along its length. The left and right opposing push rods 215 are connected by a crossbar 217. Both ends of the crossbar 217 slide in contact with the corresponding push groove 216 via pins. Simultaneously, a vertical rod 218 is installed at the upper end of the crossbar 217, serving as the drive input end and capable of reciprocating in the left and right directions. When the vertical rod 218 moves to the right, the horizontal rod 217 drives the left and right push rods 215 to move synchronously to the right. At this time, the lower end of the push rod 215 pushes the moving contact 213 to rotate clockwise around the hinge point, so that the left and right moving contacts 213 approach each other and finally make contact and engage, completing the circuit connection. Conversely, when the vertical rod 218 moves to the left, it drives the horizontal rod 217 and the push rod 215 to move to the left as a whole. The lower end of the push rod 215 drives the left and right moving contacts 213 to rotate counterclockwise synchronously, realizing the rapid separation of the two moving contacts 213, thereby disconnecting the circuit and forming a clear electrical isolation gap. This enables synchronous motion control of the left and right moving contacts 213 during the closing and opening processes, improving the operating efficiency and installability of the disconnector assembly.

[0034] Please see Figures 8-10 To achieve reliable closing and safe opening operations between the moving contact 221 and the stationary contact 222, two compression plates 228 are symmetrically arranged vertically around the moving contact 221. The compression plates 228 are semi-circular in shape and made of insulating material. The compression plates 228 slide vertically with the circuit breaker body. The upper and lower compression plates 228 can move towards each other simultaneously, that is, move towards the direction of the moving contact 221 and apply a lateral compression force to the moving contact 221, forcing it to break away from the contact state with the stationary contact 222, thus achieving fast and reliable circuit disconnection. The right end of the moving contact 221 is provided with a protrusion that plugs into the stationary contact 222. When the circuit is closed, the protrusion is inserted into the corresponding socket of the stationary contact 222, forming an enhanced plug-in structure. This not only improves the conductive area and contact stability between the moving contact 221 and the stationary contact 222, but also effectively prevents accidental tripping caused by vibration or short-term overcurrent.

[0035] During the closing process, the upper and lower pressing plates 228 are in their initial positions away from the moving contact 221. At this time, the connecting spring 227 is in a naturally extended state. Under its elastic force, the moving contact 221 automatically moves to the right and fits tightly against the stationary contact 222, completing the circuit connection. During the opening operation, the upper and lower pressing plates 228 move towards each other. The side of the pressing plate closest to the moving contact 221 has a groove 229 that matches the protrusion of the moving contact 221. When the pressing plate 228 continues to approach the moving contact 221, the protrusion is embedded in the groove 229 and guided to disengage from the stationary contact 222. The pressing action then closes the moving contact 221. The stationary contact 222 is forcibly pushed away, thereby achieving rapid separation and electrical disconnection between the two. By applying force simultaneously in both the upper and lower directions, the moving contact 221 is subjected to balanced force in the vertical plane, thus avoiding uneven force on the stationary contact 222 or unstable phenomena such as deflection and swaying caused by applying pushing force from only one side. This not only improves the response speed and reliability of the tripping action, but also ensures the rapid separation and uniform opening of the contact surfaces between the moving contact 221 and the stationary contact 222, forming a uniform and stable electrical gap, thereby improving the arc extinguishing efficiency and enhancing the circuit breaker's breaking capacity under high current or high voltage conditions.

[0036] Please see Figure 9 and Figure 10 To further increase the separation distance between the moving contact 221 and the stationary contact 222 during the tripping process, and to ensure a sufficiently large electrical clearance between them to meet the safety disconnection requirements under high voltage and high current conditions, two mounting slots 230 distributed front to back are provided on the left side of the extrusion plate 228. A wedge-shaped push plate 231 is slidably installed vertically within the mounting slot 230, with its inclined surface facing the direction of the moving contact 221. This is used to apply additional pushing force to the moving contact 221 during subsequent actions. An installation rod 232 is installed inside the 30, which slides up and down with the wedge-shaped push plate 231 to guide the movement trajectory of the wedge-shaped push plate 231. At the same time, a support spring 233 sleeved on the installation rod 232 is connected between the installation groove 230 and the wedge-shaped push plate 231. The support spring 233 has a large elastic coefficient to provide initial support force for the wedge-shaped push plate 231 and keep it in its natural position at the beginning of the opening. A support plate 234 is connected between the front and rear wedge-shaped push plates 231 to ensure that the front and rear wedge-shaped push plates 231 move synchronously.

[0037] In actual operation, when the upper and lower pressing plates 228 move towards each other and gradually approach each other until they come into contact, the support spring 233 is still in an uncompressed state, and the entire structure is in its initial stage. When the force continues to be applied to the support plate 234, the wedge-shaped push plate 231 will move along the mounting groove 230 towards the moving contact 221 under the guidance of the mounting rod 232, and the support spring 233 will be compressed accordingly, storing reset potential energy. During this process, the inclined surface of the wedge-shaped push plate 231 contacts the moving contact 221 and applies a lateral thrust, forcing the moving contact 221 to move further away from the stationary contact 222, thereby increasing the safety distance between the moving contact 221 and the stationary contact 222 on the original basis. This structural design not only realizes the multi-stage push separation mechanism between the moving contact 221 and the stationary contact 222, improving the break stability and arc extinguishing efficiency during the opening process, but also effectively prevents the problem of disconnection failure caused by the rebound of the moving contact 221 or the reignition of the arc.

[0038] Please see Figure 4 , Figure 5 , Figure 8 and Figure 9 To achieve synchronous, opposite-direction movement of the upper and lower support rods during opening or closing, and to ensure coordination of operations and structural stability, a control rod 235 is installed on the side of the support plate 234 away from the pressing plate 228, which slides vertically with the circuit breaker body. The end of the control rod 235 away from the support plate 234 is tilted to the left, forming an oblique drive structure. A triangular block 236 is provided on the right side of the control rod 235. A slider is installed on the inclined surface of the triangular block 236, which slides with the inclined surface of the control rod 235. This allows the triangular block 236 to drive the control rod 235 to move vertically through the contact between the slider and the control rod 235 when moving left or right. Specifically, when the triangular block 236 moves to the left, its inclined surface presses against the inclined surface at the end of the control rod 235, causing the control rod 235 to drive the support plate 234 to move vertically. The contact 221 moves in the direction of the contact; conversely, when the triangular block 236 moves to the right, the control rod 235 resets and drives the support plate 234 to rise back to the initial position. In order to ensure the synchronicity of the movement of the upper and lower triangular blocks 236, a moving frame 237 is connected between the upper and lower triangular blocks 236. The lower end of the moving frame 237 slides left and right with the housing 1 to enhance the stability of the overall structure during movement. The right side of the lower triangular block 236 is provided with an elastic telescopic column 238 fixedly connected to the housing 1, which is used to provide auxiliary thrust to the lower triangular block 236 during operation. When the upper triangular block 236 is subjected to external driving force and has a tendency to deviate, the support of the elastic telescopic column 238 can effectively prevent the overall structure from becoming unstable, stuck or moving asynchronously due to uneven force.

[0039] Please see Figures 4-6 and Figure 8 To achieve synchronous left and right movement of the vertical rod 218 and the triangular block 236 during operation, and to ensure a clear sequence of actions between the circuit breaker assembly and the disconnecting switch assembly during closing and opening (i.e., when closing, the disconnecting switch assembly closes first, followed by the circuit breaker assembly; when opening, the circuit breaker assembly opens first, followed by the disconnecting switch assembly), slide bars 239 are installed on the right side of the vertical rod 218 and the triangular block 236, respectively. A cam 240 is provided on the right side of the slide bar 239, and a side groove 241 is provided on the outer side of the cam 240 to slide and engage with the slide bar 239. When the cam 240 rotates, it can push the corresponding vertical rod 218 or triangular block 236 to move through its engagement with the slide bar 239. In addition, a roller 242 is rotatably installed on the outer side of the slide bar 239 to roll and contact the side groove 241. The roller 242 helps to reduce the friction between the slide bar 239 and the cam 240, reducing the increase in operating force or the phenomenon of action jamming caused by excessive friction.

[0040] In addition, the left and right cams 240 can rotate synchronously, but their working states differ: during the opening process, when the cam 240 rotates counterclockwise as a whole, the protruding edge of the right cam 240 first contacts the slider 239 on the triangular block 236 and applies a pushing force, thereby pushing the triangular block 236 to the left, thus controlling the moving contact 221 in the circuit breaker assembly to move away from the stationary contact 222; while at this time, the left cam 240 still maintains sliding contact with the slider 239 on the vertical rod 218 with its smooth surface. Since no squeezing action is applied to the vertical rod 218, the disconnector assembly has not yet activated. As the cam 240 continues to rotate counterclockwise, the right cam 240 continuously pushes the triangular block 236 to the left, while the left cam 240 gradually enters the contact stage between its protruding part and the slider 239 of the vertical rod 218, and begins to apply a pushing force to the vertical rod 218, causing the vertical rod 218 to move to the left and drive the disconnector assembly to complete the tripping action. This realizes the orderly tripping process in which the circuit breaker assembly trips before the disconnector assembly and the disconnector assembly trips subsequently.

[0041] During the closing process, cam 240 rotates clockwise to reset. At this time, the left cam 240 first returns to a non-pressed state between its smooth surface and the slide bar 239 on the vertical rod 218, causing the vertical rod 218 to move to the right first, driving the disconnecting switch assembly to complete the closing action. Meanwhile, the right cam 240 is still in contact with the slide bar 239 on the triangular block 236, continuing to apply pressure to the triangular block 236. Only after the cam 240 rotates further does the triangular block 236 release pressure and gradually reset after the slide bar 239 disengages from the cam 240. The circuit breaker assembly is subsequently closed. In addition, during the reset process, the contact between the cam 240 and the triangular block 236 also has a certain buffering effect, which can slow down the reset speed of the triangular block 236 and prevent mechanical damage or unstable operation due to excessive impact, thereby improving the reliability of the overall structure. This structure, by setting a double-sided cam 240 system with different action sequences, realizes the orderly linkage between the circuit breaker assembly and the disconnecting switch assembly during the closing and opening processes, which not only improves the safety and controllability of operation, but also effectively avoids the risk of misoperation.

[0042] Please see Figure 3 , Figure 4 and Figures 11-13 To ensure that the left and right cams 240 rotate synchronously during operation and can stably maintain this state after rotating to the designated position, preventing accidental rotation due to external force or vibration, the front and rear opposing cams 240 are mounted on the same rotating shaft 243. The rotating shaft 243 is rotatably connected to the housing 1, and a fixed plate 244 rotatably connected to the rotating shaft 243 is installed inside the housing 1. The rotating shaft 243 passes through the fixed plate 244 and is equipped with a ratchet 245. The ratchet 245 can rotate synchronously with the rotating shaft 243. An extension plate 246 is provided on the inner side of the ratchet 245 and is fixedly connected to the fixed plate 244. A sliding block 247 is slidably mounted on the extension plate 246. The upper end of the sliding block 247 is hinged to a ratchet tooth 248 that cooperates with the ratchet 245 through a torsion spring shaft. Under the action of the torsion spring shaft, the ratchet tooth 248 always maintains a tendency to move towards the ratchet 245, thereby achieving automatic engagement with the teeth of the ratchet 245.

[0043] During the tripping operation, when the rotating shaft 243 rotates counterclockwise, the cam 240 rotates synchronously. At this time, the ratchet 248, pushed by the tooth surface of the ratchet 245, temporarily disengages against the torsion spring force, allowing the rotating shaft 243 to rotate freely, thereby achieving orderly tripping control between the circuit breaker assembly and the disconnector assembly. When the cam 240 rotates to the set angle, the ratchet 248 resets and engages with the ratchet 245, preventing the rotating shaft 243 from continuing to rotate, thus locking the cam 240 at the current angle position and ensuring the circuit breaker assembly and the disconnector assembly maintain their respective operating positions. Maintaining a stable open state prevents abnormal circuit conduction due to springback or offset. When performing a closing reset operation, the sliding block 247 must first be moved forward along the extension plate 246 to disengage the ratchet 248 from the ratchet 245, thus releasing the limit on the rotating shaft 243. At this time, the rotating shaft 243 can drive the cam 240 and the ratchet 245 to rotate clockwise to reset, completing the restoration of the overall structure. After the reset is completed, the sliding block 247 is released, and the ratchet 248 automatically engages with the ratchet 245 again under the action of the torsion spring, preparing for the next opening operation.

[0044] Please see Figures 11-13 To enable the sliding block 247 to move back and forth on the extension plate 246, and to control the engagement and disengagement of the ratchet 248 and the ratchet 245, a control plate 249 is installed on the front side of the sliding block 247. A sliding column 250 is installed at the lower end of the control plate 249. A spiral groove 251 that slides with the sliding column 250 is opened on the outer side of the rotating shaft 243. When the rotating shaft 243 rotates, the sliding column 250 moves synchronously under the guidance of the spiral groove 251, and generates axial displacement due to the spiral structure of the spiral groove 251, thereby driving the control plate 249 and its connected sliding block 247 and extension plate 246 to move back and forth in a linear direction. In addition, a rotating column 252 is rotatably installed at the front end of the ratchet 245, and a fixing strip 253 is installed on the outer side of the rotating column 252. The ratchet 245 has a... A semi-annular groove 254 is provided to rotatably engage with the fixing bar 253, allowing the fixing bar 253 to rotate freely relative to the ratchet 245 within a certain range. During the process of the ratchet 248 disengaging from the ratchet 245, the fixing bar 253 can be rotated at a certain angle (e.g., half a turn) within the semi-annular groove 254 by the rotating column 252. At this time, the rotating column 252 only drives the fixing bar 253 to rotate without affecting the relative position of the ratchet 245 and the rotating shaft 243, thereby avoiding accidental triggering of the ratchet 245 locking function. After the fixing bar 253 rotates to the limit end that abuts against the semi-annular groove 254, the continued application of rotational force will drive the ratchet 245 to rotate as a whole through the fixing bar 253, thereby driving the rotating shaft 243 to rotate synchronously, realizing the reset and closing operation of the disconnector switch assembly and the circuit breaker assembly.

[0045] In addition, a pulley 255 is installed at the front end of the rotating column 252. The left and right pulleys 255 are connected by a belt 256. Through the meshing transmission between the belt 256 and the pulleys 255 on both sides, the left and right rotating columns 252 are kept highly synchronized during rotation, thereby driving the left and right rotating shafts 243 and cam 240 assemblies connected to them to rotate synchronously, so as to accurately control the closing and opening operations of the circuit breaker assembly and the disconnecting switch assembly. The front end of the pulley 255 on the left side is equipped with a control shaft that is rotatably connected to the housing 1. After the control shaft extends out of the housing 1, it can be connected to an external operating component (such as a manual control handle or an electric drive device). When the operating handle is manually rotated or the electric drive device is started, the power is input through the control shaft and transmitted to the rotating columns 252 on both sides through the belt 256 transmission system, thereby realizing the synchronous linkage of the left and right rotating shafts 243 and cam 240.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0047] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pole-mounted circuit breaker with a built-in disconnector switch, characterized in that, include: The enclosure (1) has independent left and right insulating chambers (2) inside. The left and right sides of the enclosure (1) are respectively provided with power input terminal and load output terminal. The disconnecting switch assembly is located in the insulating chamber (2) on the left side and includes moving contacts (213) arranged on the left and right sides. When the switch is closed, the moving contacts (213) on the left and right sides contact each other and are electrically connected. When the switch is opened, the moving contacts (213) on the left and right sides can rotate counterclockwise at the same time, quickly separate from each other and form an obvious electrical isolation gap. The circuit breaker assembly is located in the insulating chamber (2) on the right side and includes a moving contact (221) and a stationary contact (222). The moving contact (221) can move left and right along the circuit breaker body, and the stationary contact (222) is located in the circuit breaker body and cooperates with the moving contact (221) to realize the connection and disconnection of the circuit. The extrusion plate (228) is distributed vertically about the moving contact (221) and slides vertically with the circuit breaker body. The upper and lower extrusion plates (228) can move towards each other to isolate the moving contact (221) from the stationary contact (222) and achieve safe separation of the moving contact (221) from the stationary contact (222). The power input terminal and the load output terminal are respectively provided with an input terminal (211) and an output terminal (212). The moving contact (213) on the left side is hinged to the right end of the input terminal (211), and the moving contact (213) on the right side is hinged to the left end of the conductive post (214). Push rods (215) are installed at the upper ends of the hinge points of the left and right moving contact blades (213). Push rods (215) have push grooves (216) at the upper ends. The left and right push rods (215) are connected by a crossbar (217). The left and right ends of the crossbar (217) are slidably engaged with the corresponding push grooves (216) by a pin. A vertical rod (218) is installed at the upper end of the crossbar (217). The extrusion plate (228) has two mounting slots (230) distributed front and back on the left side. A wedge-shaped push plate (231) is slidably arranged in the mounting slot (230). A mounting rod (232) is installed in the mounting slot (230) and slides up and down with the wedge-shaped push plate (231). A support spring (233) sleeved on the mounting rod (232) is connected between the mounting slot (230) and the wedge-shaped push plate (231). A support plate (234) is connected between the front and back wedge-shaped push plates (231).

2. The pole-mounted circuit breaker with built-in disconnector as described in claim 1, characterized in that: A control rod (235) that slides vertically with the circuit breaker body is installed on the side of the support plate (234) away from the extrusion plate (228). The end of the control rod (235) away from the support rod is tilted to the left. A triangular block (236) is provided on the right side of the control rod (235). The inclined surface of the triangular block (236) slides with the inclined surface of the control rod (235). A movable frame (237) is connected between the upper and lower triangular blocks (236). The lower end of the movable frame (237) slides horizontally with the box (1). An elastic telescopic column (238) that is fixedly connected to the box (1) is provided on the right side of the lower triangular block (236).

3. A pole-mounted circuit breaker with built-in disconnector as described in claim 1, characterized in that: The stationary contact (222) is installed on the left end of the output pole (212). The circuit breaker body is fixedly mounted on the output pole (212). The moving contact (221) is equipped with a conductive post (223) on the left end. A conductive sleeve (224) is fixedly connected to the housing (1) between the left and right insulating chambers (2). A conductive disk (225) is installed on the left end of the conductive post (223) and slides with the conductive sleeve (224). A conductive rod (226) is installed on the left end of the conductive disk (225) and slides with the conductive sleeve (224). A connecting spring (227) is sleeved on the outside of the conductive rod (226) between the conductive disk (225) and the inner wall of the left side of the conductive sleeve (224). The left end of the conductive rod (226) slides with the conductive post (214).

4. A pole-mounted circuit breaker with built-in disconnector as described in claim 3, characterized in that: The right end of the moving contact (221) is provided with a protrusion that engages with the stationary contact (222), and the side of the extrusion plate (228) near the moving contact (221) is provided with a slot (229) that engages with the protrusion.

5. A pole-mounted circuit breaker with built-in disconnector as described in claim 2, characterized in that: The vertical rod (218) and the right side of the triangular block (236) are respectively equipped with slide bars (239). A cam (240) is provided on the right side of the slide bar (239). A side groove (241) is opened on the outer side of the cam (240) to slide and cooperate with the slide bar (239). A roller (242) is rotatably installed on the outer side of the slide bar (239) to roll and contact the side groove (241). The cams (240) that are opposite to each other are installed on the same rotating shaft (243).

6. A pole-mounted circuit breaker with built-in disconnector as described in claim 5, characterized in that: The housing (1) is equipped with a fixed plate (244) that is rotatably connected to the rotating shaft (243). The rotating shaft (243) passes through the fixed plate (244) and is equipped with a ratchet (245). An extension plate (246) that is fixedly connected to the fixed plate (244) is provided on the inner side of the ratchet (245). A sliding block (247) is slidably installed on the extension plate (246). The upper end of the sliding block (247) is hinged with a ratchet tooth (248) that cooperates with the ratchet (245) through a torsion spring shaft.

7. A pole-mounted circuit breaker with built-in disconnector as described in claim 6, characterized in that: A control plate (249) is installed on the front side of the sliding block (247), and a sliding column (250) is installed at the lower end of the control plate (249). A spiral groove (251) that slides with the sliding column (250) is opened on the outer side of the rotating shaft (243). The ratchet (245) has a rotating column (252) rotatably mounted at its front end, and a fixing strip (253) is mounted on the outside of the rotating column (252). A semi-annular groove (254) is provided on the ratchet (245) to rotate and cooperate with the fixing strip (253).

8. A pole-mounted circuit breaker with built-in disconnector as described in claim 7, characterized in that: The rotating column (252) is equipped with a pulley (255) at its front end. The left and right pulleys (255) are connected by a belt (256). The pulley (255) on the left side is equipped with a control shaft that is rotatably connected to the housing (1).

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