Built-in isolation circuit breaker switch

Abstract

The invention discloses a built-in isolation circuit breaker switch which comprises a shell, a circuit breaker assembly and an isolation switch assembly are installed in the shell, and a feeder terminal integrated module is installed on the lower portion in the shell. And the interlocking mechanism is arranged in the shell, the interlocking mechanism is linked with the driving main shaft, the interlocking mechanism is used for correcting the opening and closing sequence of the circuit breaker assembly and the disconnecting switch assembly, and in the scheme, the feeder terminal integrated module, the circuit breaker assembly and the disconnecting switch assembly are installed in the shell together. The cable is simple in structure and more convenient to install, avoids some defects caused by exposure of a traditional split type cable outside, exposure of wind and sun throughout the year, plugging of an aviation plug and the like, and meanwhile, the overall size is also reduced. The application of the interlocking mechanism is used for preventing the circuit breaker from being switched on firstly and then the isolating switch from being switched on during switching on; meanwhile, during opening, the situation that the disconnecting switch is firstly opened and then the circuit breaker is opened is avoided.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker and disconnector technology, and specifically relates to a built-in disconnector circuit breaker switch. Background Technology

[0002] In power distribution automation systems, pole-mounted switches are key control and protection devices, and their reliability and intelligence level directly affect power supply quality.

[0003] Traditional pole-mounted switches often employ a "split-type" design, where the feeder unit (FTU), circuit breaker, and disconnector are installed as independent units. While this structure offers clear modularity, it has significant drawbacks: First, the connections between units require numerous external cables, which are constantly exposed outdoors, susceptible to wind, sun, and rain, leading to insulation aging, corrosion, and decreased reliability. Second, electrical connections between units are typically made via aviation connectors, involving multiple insertion points, resulting in complex installation and commissioning, large size, and susceptibility to poor contact under long-term vibration. Third, the split-type structure makes the overall equipment bulky and inconvenient to install, making it difficult to adapt to increasingly compact installation space requirements. Regarding operational safety, the operating sequence of the circuit breaker and disconnector is crucial. According to electrical safety regulations, the principle of "closing the disconnector before closing the circuit breaker when energizing, and opening the circuit breaker before opening the disconnector when de-energizing" must be strictly followed. Reversing this sequence (such as opening or closing the disconnector under load) will generate a strong electric arc, easily leading to equipment damage or even personal injury accidents. Summary of the Invention

[0004] The purpose of this invention is to provide a built-in isolating circuit breaker switch to solve the problems raised in the background art of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A built-in isolating circuit breaker switch includes: a housing, in which a circuit breaker assembly and an isolating switch assembly are installed, and a feeder terminal integrated module is installed at the lower part of the housing; The circuit breaker assembly includes an operating mechanism, on which a drive spindle is mounted. The operating mechanism is used to control the displacement of the drive spindle. A vacuum arc-extinguishing mechanism is connected to the drive spindle. The displacement of the drive spindle is used to control the opening and closing of the vacuum arc-extinguishing mechanism. An interlocking mechanism is provided inside the housing and is linked to the drive shaft. The interlocking mechanism is used to correct the opening and closing sequence of the circuit breaker assembly and the disconnecting switch assembly.

[0006] Preferably, the operating mechanism includes a starter and a linkage plate, the linkage plate being rotatably disposed inside the operating mechanism, the starter driving the linkage plate to rotate, and one end of the linkage plate being hinged to the drive spindle.

[0007] Preferably, the vacuum arc-extinguishing mechanism includes a triangular connecting plate with three interfaces a, b, and c. Interface b is hinged to the drive spindle, and a mounting post is hinged to interface c. An insulating pull rod is mounted on one end of the mounting post, and a vacuum arc-extinguishing chamber is mounted on the other end of the insulating pull rod. A conductive busbar is connected to the vacuum arc-extinguishing chamber. A baffle plate is fixed to the inner wall of the housing, and interface a is hinged to the baffle plate.

[0008] Preferably, a fixed plate is fixedly connected to the side near the baffle plate, and a buffer is fixedly fixed to the inner wall of the fixed plate. A reinforcing plate is fixedly connected to the drive spindle, and a roller is rotatably connected to the reinforcing plate. During the displacement process, the drive spindle will release kinetic energy due to the influence of the opening spring. During the circuit breaker opening process, the drive spindle will quickly displace a certain distance under the influence of the kinetic energy of the opening spring. The roller on the reinforcing plate will impact the buffer, which can absorb and disperse the impact energy generated by the rapid displacement of the drive spindle.

[0009] Preferably, an extension shaft is fixedly connected below the drive spindle, and an auxiliary switch is fixedly fixed below the extension shaft. An eccentric block is connected to the output end of the auxiliary switch, and one end of the eccentric block is slidably inserted into the extension shaft. The auxiliary switch is fixed inside the housing, specifically at the top of the housing. One end of its eccentric block is a "U"-shaped groove, and its extension shaft can slide within the "U"-shaped groove. When the drive spindle is displaced (closing or opening), the displacement of the extension shaft will cause the eccentric block of the auxiliary switch to rotate, thereby changing the contacts of the auxiliary switch. The auxiliary switch reflects the opening and closing position of the main contacts of the circuit breaker through the contact state (closed / open).

[0010] Preferably, a synchronous shaft is inserted into the drive spindle, and a tripping spring is suspended on the synchronous shaft. The other end of the tripping spring is fixed to the inner wall of the housing, and one end of the synchronous shaft is connected to an interlocking mechanism. The tripping spring stores elastic potential energy. When the circuit breaker receives a tripping command, the spring rapidly releases the energy, transmitting the force to the drive spindle via the synchronous shaft. This causes the spindle to rotate rapidly, leading to the rapid separation of the circuit breaker contacts. This rapid tripping capability enables timely circuit disconnection during power system faults, preventing the fault from escalating, reducing damage to electrical equipment, and improving the stability and reliability of the power system. The synchronous shaft serves a connecting and synchronizing function, ensuring that the force exerted by the tripping spring on the drive spindle is transmitted evenly and synchronously.

[0011] Preferably, the interlocking mechanism includes a sheet metal base fixed inside the housing. A rotating shaft is rotatably connected to the sheet metal base. A synchronizing plate is fixed to one end of the rotating shaft and is engaged with the synchronizing shaft. An eccentric plate is fixed to the other end of the rotating shaft. A U-shaped linkage block is rotatably connected to one side of the eccentric plate. A connecting rod is slidably fitted onto the U-shaped linkage block. A bushing is fixed to the inner wall of the sheet metal base. The tail end of the connecting rod is slidably assembled with the bushing. The sheet metal base is fixed above the inner wall of the housing. A concentric disk is installed on the surface of the sheet metal base to determine the circular installation position of the rotating shaft. There is a "U"-shaped notch on the synchronous plate, which is engaged with the synchronous shaft. When the drive spindle moves, it synchronously drives the synchronous shaft to move, that is, the synchronous shaft will push the synchronous plate to rotate. Since the synchronous plate is fixed to the rotating shaft, it means that the rotation angle of the rotating shaft changes. At the same time, the eccentric plate rotates synchronously, and the position of the U-shaped linkage block connected by the hinge on the eccentric plate will change. In this way, the U-shaped linkage block pushes the connecting rod to move. The tail end of the connecting rod is slidably assembled with the bushing, which means that the rotational motion of the eccentric plate is converted into the horizontal motion of the connecting rod.

[0012] Preferably, the U-shaped linkage block has a slot, and one end of the connecting rod is fixed with a retaining shaft, which slides within the slot. The shaft engages with the slot of the U-shaped linkage block via the retaining shaft, and nuts are attached to both ends of the connecting rod. These nuts should not be tightened too much to ensure that the retaining shaft can move stably within the slot, thereby allowing the connecting rod to move back and forth within the bushing under the rotation of the eccentric plate.

[0013] Preferably, the disconnector assembly includes an disconnector shaft and an disconnector motor. The disconnector motor is fixed to the inner wall of the housing. The disconnector shaft is connected to the output end of the disconnector motor. An disconnector guide plate is fixed inside the housing. Disconnector side guide plates are fixed on both sides of the disconnector guide plate. A guide rail is provided on the surface of the disconnector side guide plate. An insulating pull plate is fixed on the disconnector shaft. A linkage rod is hinged to one end of the insulating pull plate. A linkage rod is hinged to the insulating pull plate. A guide rod is hinged to one end of the linkage rod. An insulating disconnector rod is connected to the guide rod. An insulating disconnector rod is installed on the insulating disconnector rod. A contact finger seat is sleeved on the insulating disconnector rod. The contact finger seat contacts the conductive busbar. An disconnector connecting rod is correspondingly located above the insulating disconnector rod. A curved plate is fixedly connected to the disconnector shaft. The rotation of the isolating shaft is driven by an isolating motor. When the shaft rotates, it drives the insulating pull plate to rotate, pushing the linkage rod hinged to the pull plate. Since the isolating insulating rod is confined within the guide rail by the guide rod, and because one end of the linkage rod is hinged to the guide rod, the pushing of the linkage rod causes the guide rod to move within the guide rail, resulting in the isolating insulating rod moving up and down. When the isolating conductive rod is pushed until the isolating contact rods contact each other, the state is closed; the opposite is true. The curved plate is fixed to the isolating shaft, meaning that the rotation of the isolating shaft synchronously changes the position of the curved plate, thus enabling the use of the interlocking mechanism through the curved plate.

[0014] Preferably, an assisting crank arm is also fixed on the isolation shaft. A compression spring rod is hinged to one side of the assisting crank arm, and an isolation compression spring is fitted onto the compression spring rod. A spindle plate is fixed to the inner wall of the housing, and a concentric wheel is rotatably connected to the spindle plate. The compression spring rod passes through the concentric wheel. The isolation compression spring is fitted onto the compression spring rod. When the isolation shaft rotates to perform the isolation operation, the assisting crank arm moves accordingly, thereby driving the compression spring rod to move. The isolation compression spring generates corresponding elastic force according to its compressed or stretched state, and this elastic force can provide assistance for the rotation of the isolation shaft.

[0015] The technical solution of this invention has the following beneficial effects: 1. In this solution, the feeder terminal integration module, circuit breaker assembly and disconnector switch assembly are installed together inside the housing. Compared with the traditional split type, the installation is more convenient and avoids some drawbacks caused by the traditional split type of exposed cables, which are exposed to wind and sun all year round and aviation plugs. At the same time, the overall size is also reduced.

[0016] 2. The use of interlocking mechanisms is to avoid closing the circuit breaker first and then the disconnecting switch when closing the circuit breaker; and to avoid opening the disconnecting switch first and then the circuit breaker when opening the circuit breaker. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0020] Figure 3 This is a diagram showing the circuit breaker and disconnector of the present invention.

[0021] Figure 4 This is a schematic diagram of the circuit breaker closing according to the present invention.

[0022] Figure 5 This is a schematic diagram of the circuit breaker tripping according to the present invention.

[0023] Figure 6 This is a partial structural diagram of the circuit breaker of the present invention.

[0024] Figure 7 This is a partial structural diagram of the circuit breaker of the present invention.

[0025] Figure 8 This is a partial structural diagram of the circuit breaker of the present invention.

[0026] Figure 9 This is an enlarged view of point A in the present invention.

[0027] Figure 10 This is a diagram showing the installation position of the buffer according to the present invention.

[0028] Figure 11 This is a schematic diagram of the triangular connecting plate of the present invention.

[0029] Figure 12 This is a partial structural diagram of the interlocking mechanism of the present invention.

[0030] Figure 13 This is a schematic diagram of a partial structure of the tripping circuit breaker of the present invention.

[0031] Figure 14 This is a schematic diagram of a partial structure of the tripping circuit breaker of the present invention.

[0032] Figure 15 This is a schematic diagram of a partial closing structure of the present invention.

[0033] Figure 16 This is a partial installation diagram of the connecting rod of the present invention.

[0034] Figure 17 This is an enlarged view of section B of the present invention.

[0035] Reference numerals: 10. Circuit breaker assembly; 101. Operating mechanism; 102. Starter; 103. Linkage plate; 104. Drive spindle; 105. Triangular linkage plate; 106. Mounting column; 107. Insulating tie rod; 108. Vacuum interrupter; 109. Baffle plate; 110. Roller; 111. Fixing plate; 112. Buffer; 113. Eccentric block; 114. Extension shaft; 115. Synchronous shaft; 116. Opening spring; 118. Conductor bar; 119. Reinforcing plate; 120. Auxiliary switch; 20. Disconnect switch assembly; 201. Disconnect shaft; 202. Insulating pull plate; 203. Linkage rod; 204. Disconnect guide plate; 205. Disconnect side guide plate; 206. Guide rail; 207. Guide rod; 208. Disconnect insulating rod; 209. Curved plate; 210. Disconnect conductive rod; 211. Contact finger seat; 212. Disconnect connecting rod; 213. Assist crank arm; 214. Compression spring rod; 215. Disconnect compression spring; 216. Shaft plate; 217. Concentric wheel; 218. Disconnect motor; 30. Housing; 301. Feeder terminal integrated module; 40. Interlocking mechanism; 401. Sheet metal base; 402. Rotary shaft; 403. Synchronous plate; 404. Concentric disc; 405. Eccentric plate; 406. U-shaped linkage block; 4061. Groove; 407. Connecting rod; 4071. Shaft retainer; 408. Bushing. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0037] Example 1: Reference Figures 1-17 , A built-in isolating circuit breaker switch includes: a housing 30, a circuit breaker assembly 10 and an isolating switch assembly 20 installed inside the housing 30, and a feeder terminal integrated module 301 installed at the lower part of the housing 30. In this implementation scheme, the feeder terminal integration module 301: The feeder terminal unit (FTU) integration module typically includes core components such as protection control, communication, edge computing, power management, line loss acquisition, and display interaction. These modules work together to achieve real-time monitoring, fault handling, data communication, and intelligent management functions of the FTU. In this scheme, the feeder terminal integration module 301, the circuit breaker assembly 10, and the disconnector switch assembly 20 are installed together inside the housing 30, which protects the internal structure. Here, the feeder terminal integration module 301 is not limited and can be considered a conventional FTU module.

[0038] In this implementation scheme, optionally, the feeder terminal integration module 301 is installed together with the circuit breaker assembly 10. Compared with the traditional split type, the installation is more convenient and avoids some drawbacks caused by the traditional split type of cable being exposed to the outside, being exposed to wind and sun all year round, and the connection of aviation plugs. At the same time, the overall size is also reduced.

[0039] In this implementation plan, an optional built-in type is adopted, which avoids the various drawbacks of traditional external type, which are greatly affected by the on-site environment, such as foreign object contact, phase-to-phase short circuit faults caused by wind and rain, and phase-to-ground breakdown leading to power outages.

[0040] In this implementation scheme, optionally, both the circuit breaker assembly 10 and the disconnector assembly 20 are electrically controlled and equipped with corresponding control motors. The use of electric operation can accurately determine whether the opening and closing are in place, which greatly reduces safety hazards.

[0041] The circuit breaker assembly 10 includes an operating mechanism 101, on which a drive spindle 104 is mounted. The operating mechanism 101 is used to control the displacement of the drive spindle 104. A vacuum arc-extinguishing mechanism is connected to the drive spindle 104. The displacement of the drive spindle 104 is used to control the opening and closing of the vacuum arc-extinguishing mechanism. Disconnecting switch assembly 20 is used for power isolation; In the implementation plan, the disconnector assembly 20 and the circuit breaker assembly 10 are used in conjunction with each other. The disconnector assembly 20 isolates the power supply and forms a clear disconnection point, while the circuit breaker assembly 10 cuts off the load current and short-circuit current.

[0042] Interlocking mechanism 40 is installed inside housing 30 and is linked to drive spindle 104. Interlocking mechanism 40 is used to correct the opening and closing sequence of circuit breaker assembly 10 and disconnector assembly 20.

[0043] In this implementation scheme, the opening and closing sequence of the circuit breaker assembly 10 and the disconnector switch assembly 20 is: "close the disconnector switch first, then close the circuit breaker"; "open the circuit breaker first, then open the disconnector switch". The interlocking mechanism 40 is used to avoid closing the circuit breaker first and then closing the disconnector switch when closing, and at the same time, avoiding opening the disconnector switch first and then opening the circuit breaker when opening.

[0044] The operating mechanism 101 includes a starter 102 and a linkage plate 103. The linkage plate 103 is rotatably disposed inside the operating mechanism 101. The starter 102 drives the linkage plate 103 to rotate. One end of the linkage plate 103 is hinged to the drive spindle 104.

[0045] For details, please refer to this implementation plan. Figure 6 and Figure 7 When the starter 102 is powered on, it can drive the linkage plate 103 to rotate. In this invention, the starter 102 actually transmits power to the linkage plate 103 through the meshing of multiple sets of gears. The multi-stage gear structure in the operating mechanism 101 is not limited, as long as it can drive the linkage plate 103 to rotate. Since one end of the linkage plate 103 is hinged to the drive spindle 104, the drive spindle 104 will be displaced when the linkage plate 103 rotates, thereby realizing the electric control principle. The movement of the drive spindle 104 is used for the arc extinguishing operation of the vacuum interrupter 108. The internal structure of the vacuum interrupter 108 is not limited.

[0046] The vacuum interrupting mechanism includes a triangular connecting plate 105, which has three interfaces: a, b, and c. Interface b is hinged to the drive spindle 104, and interface c is hinged to a mounting post 106. An insulating pull rod 107 is mounted on one end of the mounting post 106, and a vacuum interrupting chamber 108 is mounted on the other end of the insulating pull rod 107. A conductive busbar 118 is connected to the vacuum interrupting chamber 108. A baffle plate 109 is fixed to the inner wall of the housing 30, and interface a is hinged to the baffle plate 109.

[0047] For details in this implementation plan, please refer to Figures 6-11Based on common sense, three-phase AC power consists of three phase wires (L1, L2, L3), each carrying an independent current. To ensure safe system operation, each phase requires independent control and protection, thus necessitating independent switching equipment for each phase. This means that there are three delta-connector plates 105, all connected to the drive spindle 104 in the same manner. Here, interface a represents the center, meaning the delta-connector plate 105 rotates around interface a, while interface b is hinged to the drive spindle 104. When the drive spindle 104 is displaced by the linkage plate 103, the positions of interfaces b and c of the delta-connector plate 105 change. When the delta-connector plate 105 rotates clockwise around interface a, interface c pushes the mounting post 106 to move, i.e., the insulating tie rod 107 moves, causing the moving and stationary contacts in the vacuum interrupter 108 to come into contact, thereby achieving the purpose of closing the circuit. Similarly, when the delta plate 105 rotates counterclockwise with interface a, interface c will pull the mounting post 106 to move, that is, the insulating rod 107 to move, so that the moving contact and the stationary contact in the vacuum interrupter 108 are separated from each other, thereby achieving the purpose of circuit breaking (arc extinction).

[0048] A fixed plate 111 is fixedly connected to the side near the baffle plate 109. A buffer 112 is fixedly fixed to the inner wall of the fixed plate 111. A reinforcing plate 119 is fixedly connected to the drive spindle 104. A roller 110 is rotatably connected to the reinforcing plate 119.

[0049] In this embodiment, during displacement, the drive shaft 104 releases kinetic energy due to the influence of the tripping spring 116. During circuit breaker tripping, the drive shaft 104 rapidly displaces a distance under the influence of the kinetic energy of the tripping spring 116, and the roller 110 on its reinforcing plate 119 impacts the buffer 112. The buffer 112 absorbs and disperses the impact energy generated by the rapid displacement of the drive shaft 104. This process effectively avoids severe vibration and rebound caused by the high-speed movement of the drive shaft 104, making the circuit breaker tripping action smoother and more reliable. Stable tripping action helps reduce mechanical wear, extend the service life of the circuit breaker, and reduce maintenance costs. The buffer 112 buffers the impact of the roller 110, preventing mechanical damage to the drive shaft 104 and related components due to direct rigid collision. This protection mechanism ensures that the internal mechanical structure of the circuit breaker remains intact during frequent tripping operations, and will not deform or break due to excessive impact force, thereby ensuring the long-term safe operation of the circuit breaker.

[0050] In this embodiment, the buffer 112 can optionally be any one of the following: oil buffer, spring buffer, rubber pad buffer, or coaxial buffer device of oil or gas, which can be used as an equivalent substitute. The specific model can be selected according to the usage requirements.

[0051] An extension shaft 114 is fixedly connected below the drive spindle 104. An auxiliary switch 120 is fixedly connected below the extension shaft 114. An eccentric block 113 is connected to the output end of the auxiliary switch 120. One end of the eccentric block 113 is slidably inserted into the extension shaft 114.

[0052] In this embodiment, the auxiliary switch 120 is fixed inside the housing 30, specifically at the top of the housing 30. One end of its eccentric block 113 is a U-shaped groove, and its extension shaft 114 can slide within the U-shaped groove. When the drive shaft 104 is displaced (closing or opening), the displacement of the extension shaft 114 will cause the eccentric block 113 of the auxiliary switch 120 to rotate, thereby changing the contacts of the auxiliary switch 120. The auxiliary switch 120 reflects the opening and closing position of the circuit breaker's main contacts through the contact state (closed / open). For example, when the circuit breaker is closed, the auxiliary switch contacts are closed, sending a "closed" signal to the control system; when it is open, the contacts are open, sending a "open" signal. The circuit breaker status signal is transmitted to the monitoring system to achieve remote real-time monitoring, making it convenient for maintenance personnel to understand the equipment's operating status.

[0053] In this implementation scheme, optionally, the auxiliary switch 120 contacts can be connected to a control circuit to interlock the circuit breaker with other equipment (such as disconnecting switches and grounding switches). For example, the disconnecting switch can only be operated after the circuit breaker has tripped and the auxiliary switch contacts have closed, preventing the circuit breaker from being tripped under load.

[0054] In this implementation scheme, optionally, a fault signal output is provided: When the circuit breaker trips due to overload, short circuit, or other faults, the auxiliary switch 120 contacts actuate, triggering an alarm device (such as an indicator light or buzzer) or sending a signal to the protection device to initiate subsequent protection actions. An abnormal position alarm is also provided: If the circuit breaker is not fully closed or open (e.g., contacts are stuck), and the auxiliary switch contacts are in an abnormal state, an alarm signal can be issued promptly to prevent equipment damage.

[0055] In this implementation scheme, optionally, the auxiliary switch 120 is integrated with a PLC / DCS: the contact signals of the auxiliary switch 120 can be directly connected to a programmable logic controller (PLC) or a distributed control system (DCS) to realize digital acquisition and automated control of the circuit breaker status. Smart Grid Applications: In smart grids, auxiliary switch signals can be used for status assessment, fault location, and self-healing control, improving the intelligence level of the power grid.

[0056] A synchronous shaft 115 is inserted into the drive spindle 104, and a brake spring 116 is suspended on the synchronous shaft 115. The other end of the brake spring 116 is fixed to the inner wall of the housing 30, and one end of the synchronous shaft 115 is connected to the interlocking mechanism 40.

[0057] In this embodiment of the invention, the trip spring 116 stores elastic potential energy. When the circuit breaker receives a tripping command, the trip spring 116 rapidly releases the energy and transmits the force to the drive shaft 104 via the synchronous shaft 115. This drives the drive shaft 104 to rotate rapidly, causing the circuit breaker contacts to separate quickly. This rapid tripping capability enables timely circuit disconnection when a power system fault occurs, preventing the fault from spreading, reducing damage to electrical equipment, and improving the stability and reliability of the power system. The synchronous shaft 115 serves a connecting and synchronizing function, ensuring that the force exerted by the trip spring 116 on the drive shaft 104 is transmitted evenly and synchronously. In a three-phase circuit breaker, the synchronous shaft 115 is interconnected with the interlocking mechanism 40, enabling the three phases to start operating almost simultaneously, avoiding asynchronous situations.

[0058] The interlocking mechanism 40 includes a sheet metal base 401, which is fixed inside the housing 30. A rotating shaft 402 is rotatably connected to the sheet metal base 401. A synchronizing plate 403 is fixed to one end of the rotating shaft 402 and is locked onto the synchronizing shaft 115. An eccentric plate 405 is fixed to the other end of the rotating shaft 402. A U-shaped linkage block 406 is rotatably connected to one side of the eccentric plate 405. A connecting rod 407 is slidably fitted on the U-shaped linkage block 406. A bushing 408 is fixed to the inner wall of the sheet metal base 401. The tail end of the connecting rod 407 is slidably assembled with the bushing 408.

[0059] In this implementation plan, refer to Figures 8-17 The sheet metal base 401 is fixed above the inner wall of the housing 30. A concentric disk 404 is installed on the surface of the sheet metal base 401 to determine the circular installation position of the rotating shaft 402. The synchronous plate 403 has a "U"-shaped notch, which is engaged with the synchronous shaft 115. When the drive spindle 104 moves, it synchronously drives the synchronous shaft 115 to move, that is, the synchronous shaft 115 will push the synchronous plate 403 to rotate. Since the synchronous plate 403 is fixed to the rotating shaft 402, it means that the rotation angle of the rotating shaft 402 changes. At the same time, the eccentric plate 405 rotates synchronously, and the position of the U-shaped linkage block 406 hinged on the eccentric plate 405 will change. In this way, the U-shaped linkage block 406 pushes the connecting rod 407 to move. The tail end of the connecting rod 407 is slidably assembled with the bushing 408, which means that the rotational motion of the eccentric plate 405 is converted into the horizontal motion of the connecting rod 407.

[0060] In this embodiment, optionally, the connecting rod 407 is in the form of a "Z" shape, the purpose of which is to change the position of the displacement of the connecting rod 407 so that the connecting rod 407 is exactly at the disconnecting switch assembly 20 and cooperates with the curved plate 209.

[0061] In this implementation scheme, optionally, Figure 13 and Figure 14 This is a diagram showing the tripping structure of the circuit breaker and disconnector. Figure 13and Figure 14 In the middle: The position of the connecting rod 407 is blocked by the position of the curved plate 209, which means that the connecting rod 407 cannot move outward. If it moves outward, it will be blocked by the curved plate 209. According to the mechanical linkage structure principle, the fact that the connecting rod 407 cannot move outward means that the circuit breaker cannot perform the closing operation. The isolating switch assembly 20 must be closed first to make the curved plate 209 deviate from the displacement blocking range of the connecting rod 407 before the circuit breaker assembly 10 is closed. Figure 15 This is a state diagram after the circuit breaker and disconnector have been opened. Figure 15 In this mechanism, the rotation path of the curved plate 209 is blocked by the connecting rod 407. This means that the curved plate 209 will inevitably be blocked by the connecting rod 407 during its rotation, i.e., the disconnector assembly 20 cannot open first; the circuit breaker assembly 10 must open first (representing the inward displacement of the connecting rod 407) before the disconnector assembly 20 opens. The interlocking mechanism 40 prevents the disconnector from operating under load, thus avoiding the risk of arcing and meeting the mandatory anti-misoperation requirement of "preventing the opening and closing of disconnectors under load." The entire mechanism uses a linkage mechanical mechanism, which reacts quickly and can almost achieve synchronous feedback.

[0062] The U-shaped linkage block 406 has a slot 4061, and one end of the connecting rod 407 is fixed with a retaining shaft 4071, which slides within the slot 4061.

[0063] In this embodiment, the connecting rod 407 engages with the slot 4061 of the U-shaped linkage block 406 via the retaining shaft 4071. Nuts are placed at both ends of the connecting rod 407. These nuts should not be tightened too much to ensure that the retaining shaft 4071 can move stably within the slot 4061. Thus, the connecting rod 407 can move back and forth within the bushing 408 under the rotation of the eccentric plate 405.

[0064] The disconnector assembly 20 includes an isolation shaft 201 and an isolation motor 218. The isolation motor 218 is fixed to the inner wall of the housing 30. The isolation shaft 201 is connected to the output end of the isolation motor 218. An isolation guide plate 204 is fixed inside the housing 30. Isolation side guide plates 205 are fixed on both sides of the isolation guide plate 204. Guide rails 206 are provided on the surface of the isolation side guide plates 205. An insulating pull plate 202 is fixed on the isolation shaft 201. One end of the insulating pull plate 202 is hinged to a... Linkage rod 203 is hinged to insulating pull plate 202. Linkage rod 203 is hinged to guide rod 207 at one end. Guide rod 207 is connected to isolation insulating rod 208. Isolation conductive rod 210 is installed on isolation insulating rod 208. Contact finger seat 211 is sleeved on isolation conductive rod 210. Contact finger seat 211 contacts conductive bus 118. Isolation connecting rod 212 is correspondingly above isolation conductive rod 210. Curved plate 209 is fixedly connected to isolation rotating shaft 201.

[0065] In this embodiment, the rotation of the isolation shaft 201 is driven by the isolation motor 218. When the isolation shaft 201 rotates, it drives the insulating pull plate 202 to rotate, and the linkage rod 203, which is hinged to the insulating pull plate 202, is pushed. Since the isolation insulating rod 208 is displaced and limited within the guide rail 206 through the guide rod 207, and since one end of the linkage rod 203 is hinged to the guide rod 207, the linkage rod 203 is pushed during the pushing process, which pushes the guide rod 207 to move within the guide rail 206. That is, the isolation insulating rod 208 is driven to move up and down. When the isolation conductive rod 210 is pushed to the point where the isolation connecting rod 212 contacts each other, the state is the closed state; the opposite is true. The curved plate 209 is fixed to the isolation shaft 201, which means that when the isolation shaft 201 rotates, the position of the curved plate 209 will change synchronously, thereby using the interlocking mechanism 40 through the curved plate 209.

[0066] An auxiliary crank arm 213 is also fixed on the isolation shaft 201. A spring rod 214 is hinged to one side of the auxiliary crank arm 213. An isolation spring 215 is sleeved on the spring rod 214. A spindle plate 216 is fixed to the inner wall of the housing 30. A concentric wheel 217 is rotatably connected to the spindle plate 216. The spring rod 214 passes through the concentric wheel 217.

[0067] In this embodiment, the isolation spring 215 is fitted onto the spring rod 214. When the isolation shaft 201 rotates for isolation operation, the assisting crank arm 213 moves accordingly, thereby driving the spring rod 214 to move. The isolation spring 215 generates corresponding elastic force according to its compression or tension state, which provides assistance for the rotation of the isolation shaft 201. For example, when manually operating the isolating switch for opening and closing, the operator only needs to apply a small force, and the elastic force of the isolation spring 215 can assist in completing most of the operation, greatly reducing the intensity of manual operation and making the operation easier and less strenuous. Similarly, by driving the isolating motor 218, the power consumption of the isolating motor 218 can be significantly reduced, and its service life can be improved. The entire assisting structure is compact in design, with a reasonable layout between various components, occupying little space. When installed within the housing 30, it will not affect the installation and layout of other components, which is conducive to the miniaturization and integration of the equipment. For example, in some space-constrained power equipment, this compact structural design can make full use of the limited space and improve the overall performance of the equipment.

[0068] The specific implementation process of this invention is as follows: Closing process: Step 1: Closing the disconnector assembly 20: The disconnector motor 218 drives the disconnector shaft 201 to rotate. When the disconnector shaft 201 rotates, it will drive the insulating pull plate 202 to rotate. The linkage rod 203, which is hinged to the insulating pull plate 202, will be pushed. Since the disconnector insulating rod 208 is displaced and limited within the guide rail 206 through the guide rod 207, and since one end of the linkage rod 203 is hinged to the guide rod 207, the linkage rod 203 will push the guide rod 207 to move within the guide rail 206 during the pushing process. That is, the disconnector insulating rod 208 is driven to move upward. When the disconnector conductive rod 210 is pushed to the point where the disconnector connecting rod 212 contacts each other, the state at this time is closed. Step 2: Circuit Breaker Assembly 10 Closing: After the starter 102 is energized, it drives the linkage plate 103 to rotate, causing the drive shaft 104 to displace. When the delta coupling plate 105 rotates clockwise at interface a, interface c pushes the mounting post 106 to displace, i.e., the insulating pull rod 107 to displace, thereby causing the moving and stationary contacts in the vacuum interrupter 108 to come into contact, thus achieving the purpose of closing. When the drive shaft 104 displaces, it synchronously drives the synchronous shaft 115 to displace, i.e., the synchronous shaft 115 will push the synchronous plate 403 to rotate. Since the synchronous plate 403 is fixed to the rotating shaft 402, it means that the rotation angle of the rotating shaft 402 changes. At the same time, the eccentric plate 405 rotates synchronously, and the position of the U-shaped linkage block 406 hinged on the eccentric plate 405 will change. This causes the U-shaped linkage block 406 to push the connecting rod 407 to displace. The tail end of the connecting rod 407 is slidably assembled with the bushing 408, meaning that the rotational motion of the eccentric plate 405 is converted into the horizontal motion of the connecting rod 407.

[0069] Opening process: Step 1, Circuit Breaker Assembly 10 tripping: After the starter 102 is powered on, it drives the linkage plate 103 to rotate, which in turn drives the main shaft 104 to move. When the delta plate 105 rotates counterclockwise with interface a, interface c will pull the mounting post 106 to move, that is, the insulating rod 107 will move, so that the moving contact and the stationary contact in the vacuum interrupter 108 are separated from each other, thereby achieving tripping (arc extinction).

[0070] Step 2: Disconnecting switch assembly 20 opens: The disconnecting motor 218 drives the disconnecting shaft 201 to rotate. When the disconnecting shaft 201 rotates, it will drive the insulating pull plate 202 to rotate. The linkage rod 203, which is hinged to the insulating pull plate 202, will be pulled. Since the disconnecting insulating rod 208 is displaced and limited within the guide rail 206 through the guide rod 207, and since one end of the linkage rod 203 is hinged to the guide rod 207, the linkage rod 203 will pull the guide rod 207 to move within the guide rail 206 during the pulling process. That is, the disconnecting insulating rod 208 is driven to move downward. When the disconnecting conductive rod 210 is pulled to the point where the disconnecting connecting rod 212 separates from each other, the state at this time is the open circuit.

[0071] The above embodiments are merely exemplary models of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions can be made to the present invention within its spirit and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0072] In the description of this invention, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the appended circle, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, these terms indicating orientation or positional relationships should not be construed as limitations on the invention.

[0073] In the description of this invention, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between elements; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

Claims

1. A switch with a built-in isolating circuit breaker, characterized in that, include: The housing (30) contains a circuit breaker assembly (10) and a disconnector assembly (20), and a feeder terminal integration module (301) is installed at the bottom inside the housing (30). The circuit breaker assembly (10) includes an operating mechanism (101), on which a drive spindle (104) is mounted. The operating mechanism (101) is used to control the displacement of the drive spindle (104). A vacuum arc-extinguishing mechanism is connected to the drive spindle (104). The displacement of the drive spindle (104) is used to control the opening and closing of the vacuum arc-extinguishing mechanism. Interlocking mechanism (40) is disposed in housing (30) and is linked to drive spindle (104). Interlocking mechanism (40) is used to correct the opening and closing sequence of circuit breaker assembly (10) and disconnector assembly (20).

2. The built-in isolating circuit breaker switch according to claim 1, characterized in that: The operating mechanism (101) includes a starter (102) and a linkage plate (103). The linkage plate (103) is rotatably disposed inside the operating mechanism (101). The starter (102) drives the linkage plate (103) to rotate. One end of the linkage plate (103) is hinged to the drive spindle (104).

3. A built-in isolating circuit breaker switch according to claim 2, characterized in that: The vacuum arc extinguishing mechanism includes a triangular connecting plate (105), which has three interfaces: a, b, and c. Interface b is hinged to the drive spindle (104), and interface c is hinged to a mounting post (106). An insulating pull rod (107) is installed at one end of the mounting post (106), and a vacuum arc extinguishing chamber (108) is installed at the other end of the insulating pull rod (107). A conductive busbar (118) is connected to the vacuum arc extinguishing chamber (108). A baffle plate (109) is fixed to the inner wall of the housing (30), and interface a is hinged to the baffle plate (109).

4. A built-in isolating circuit breaker switch according to claim 3, characterized in that: A fixing plate (111) is fixedly connected to the side near the stop plate (109), and a buffer (112) is fixed to the inner wall of the fixing plate (111). A reinforcing plate (119) is fixedly connected to the drive spindle (104), and a roller (110) is rotatably connected to the reinforcing plate (119).

5. A built-in isolating circuit breaker switch according to claim 4, characterized in that: An extension shaft (114) is fixedly connected below the drive spindle (104), and an auxiliary switch (120) is fixedly connected below the extension shaft (114). An eccentric block (113) is connected to the output end of the auxiliary switch (120), and one end of the eccentric block (113) is slidably inserted into the extension shaft (114).

6. A built-in isolating circuit breaker switch according to claim 5, characterized in that: A synchronous shaft (115) is inserted into the drive spindle (104), and a stop spring (116) is suspended on the synchronous shaft (115). The other end of the stop spring (116) is fixed to the inner wall of the housing (30), and one end of the synchronous shaft (115) is connected to the interlocking mechanism (40).

7. A built-in isolating circuit breaker switch according to claim 6, characterized in that: The interlocking mechanism (40) includes a sheet metal base (401), which is fixed inside the housing (30). A rotating shaft (402) is rotatably connected to the sheet metal base (401). A synchronous plate (403) is fixed to one end of the rotating shaft (402). The synchronous plate (403) is clamped on the synchronous shaft (115). An eccentric plate (405) is fixed to the other end of the rotating shaft (402). A U-shaped linkage block (406) is rotatably connected to one side of the eccentric plate (405). A connecting rod (407) is slidably fitted on the U-shaped linkage block (406). A bushing (408) is fixed to the inner wall of the sheet metal base (401). The tail end of the connecting rod (407) is slidably assembled with the bushing (408).

8. A built-in isolating circuit breaker switch according to claim 7, characterized in that: The U-shaped linkage block (406) has a slot (4061) and one end of the connecting rod (407) is fixed with a retaining shaft (4071). The retaining shaft (4071) is slidably fitted in the slot (4061).

9. A built-in isolating circuit breaker switch according to claim 1, characterized in that: The disconnector assembly (20) includes an isolation shaft (201) and an isolation motor (218). The isolation motor (218) is fixed to the inner wall of the housing (30). The isolation shaft (201) is connected to the output end of the isolation motor (218). An isolation guide plate (204) is fixed inside the housing (30). Isolation side guide plates (205) are fixed on both sides of the isolation guide plate (204). A guide rail (206) is provided on the surface of the isolation side guide plate (205). An insulating pull plate (202) is fixed on the isolation shaft (201). A linkage rod (203) is hinged to one end of the plate (202). A linkage rod (203) is hinged to the insulating pull plate (202). A guide rod (207) is hinged to one end of the linkage rod (203). An isolation insulating rod (208) is connected to the guide rod (207). An isolation conductive rod (210) is installed on the isolation insulating rod (208). A contact finger seat (211) is sleeved on the isolation conductive rod (210). The contact finger seat (211) is in contact with the conductive busbar (118). An isolation connecting rod (212) is correspondingly located above the isolation conductive rod (210). A curved plate (209) is fixedly connected to the isolation shaft (201).

10. A built-in isolating circuit breaker switch according to claim 9, characterized in that: An assisting crank arm (213) is also fixed on the isolation shaft (201). A spring rod (214) is hinged to one side of the assisting crank arm (213). An isolation spring (215) is sleeved on the spring rod (214). A spindle plate (216) is fixed to the inner wall of the housing (30). A concentric wheel (217) is rotatably connected to the spindle plate (216). The spring rod (214) passes through the concentric wheel (217).

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