An interlocking device for a circuit breaker and a disconnecting switch and an outdoor pole-mounted switch.

Abstract

This invention provides an interlocking device for a circuit breaker and a disconnecting switch, and an outdoor pole-mounted switch. The interlocking device for the circuit breaker and disconnecting switch includes a circuit breaker operating mechanism, a circuit breaker drive shaft, an disconnecting rotating shaft, an disconnecting interlocking guide device, and a limiting guide pin. The circuit breaker drive shaft and the disconnecting rotating shaft are rotatably mounted, and the circuit breaker drive shaft is also linked to the operating mechanism. The disconnecting rotating shaft is provided with an disconnecting output crank arm and an disconnecting interlocking limiting crank arm. The circuit breaker drive shaft is provided with an input crank arm and an disconnecting interlocking drive crank arm. The disconnecting interlocking guide device includes a guide plate with a guide elongated hole. The limiting guide pin is fixedly mounted and passes through the guide elongated hole. The disconnecting interlocking drive crank arm is connected to the first end of the guide plate, and the second end of the guide plate corresponds to the disconnecting interlocking limiting crank arm. This device enables the interlocking of the circuit breaker and the disconnecting switch.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical distribution switchgear, and in particular to an interlocking device for a circuit breaker and a disconnecting switch, as well as an outdoor pole-mounted switch having the interlocking device for the circuit breaker and the disconnecting switch. Background Technology

[0002] Currently, pole-mounted vacuum circuit breakers are also equipped with disconnecting switches. In existing technology, vacuum circuit breakers and disconnecting switches lack interlocking and operate independently, relying on the subjective control of maintenance personnel for inspection and installation; this poses significant safety risks to on-site maintenance and installation of distribution switches. Summary of the Invention

[0003] Therefore, the present invention provides an interlocking device for a circuit breaker and a disconnecting switch, and an outdoor pole-mounted switch having the interlocking device for the circuit breaker and the disconnecting switch. An interlocking mechanism is provided between the main drive shaft of the circuit breaker and the disconnecting shaft to realize the interlocking of the vacuum circuit breaker and the disconnecting switch.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0005] An interlocking device for a circuit breaker and a disconnecting switch includes a circuit breaker operating mechanism, a circuit breaker drive shaft, an disconnecting shaft, an disconnecting interlocking guide device, and a limiting guide pin. The circuit breaker drive shaft and the disconnecting shaft are rotatably mounted, and the circuit breaker drive shaft is also linked to the circuit breaker operating mechanism. The disconnecting shaft is provided with an disconnecting output crank arm and an disconnecting interlocking limiting crank arm. The circuit breaker drive shaft is provided with an input crank arm and a disconnecting interlocking drive crank arm. The disconnecting interlocking guide device includes a guide plate with a guide elongated hole. The limiting guide pin is fixedly mounted and passes through the guide elongated hole. The disconnecting interlocking drive crank arm is connected to a first end of the guide plate, and the second end of the guide plate corresponds to the disconnecting interlocking limiting crank arm. When the circuit breaker drive shaft rotates to close or open, it drives the guide plate to move closer to or away from the disconnecting shaft.

[0006] Furthermore, the isolation interlocking guide device also includes a reset spring, the guide plate also has an mounting elongated hole, the isolation interlocking drive crank arm is movably connected to the mounting elongated hole through a limiting pin, the reset spring is assembled in the mounting elongated hole, one end of which abuts against the guide plate, and the other end abuts against the limiting pin.

[0007] Furthermore, the circuit breaker operating mechanism is provided with an energy storage holding crank arm that is linked to the circuit breaker drive shaft and an isolation interlocking limit plate that is linked to the isolation rotating shaft. The isolation interlocking limit plate is offset from the energy storage holding crank arm when it is in the open position and the closed position. The switching position of the isolation interlocking limit plate when switching between the open position and the closed position is on the closing track of the energy storage holding crank arm.

[0008] Furthermore, the isolation interlocking limit plate is rotatably mounted, and a drive limit crank arm is mounted on the isolation shaft. The drive limit crank arm is connected to the isolation interlocking limit plate via a connecting rod.

[0009] Furthermore, an arc-shaped limiting hole is formed on the drive limiting crank arm, and a limiting pin is inserted through the arc-shaped limiting hole.

[0010] An outdoor pole-mounted switch includes an operating box and a circuit breaker pole. The circuit breaker pole is equipped with a vacuum interrupter and a disconnecting switch. The operating box is equipped with the aforementioned interlocking device between the circuit breaker and the disconnecting switch. The input crank arm of the circuit breaker drive shaft is connected to the circuit breaker insulating rod of the vacuum interrupter, and the isolation output crank arm of the isolation shaft is connected to the isolation insulating rod of the disconnecting switch.

[0011] Furthermore, the circuit breaker pole includes an insulating housing and a primary incoming contact arm, a vacuum interrupter, an upper isolating contact arm, a lower isolating contact arm, and a primary outgoing contact arm, all fixed to the insulating housing. The insulating housing also forms a circuit breaker cavity, a sensor cavity, and a disconnector switch cavity. An insulating pull rod connecting to the moving end of the vacuum interrupter is installed within the circuit breaker cavity. The primary incoming contact arm is electrically connected to the moving end of the vacuum interrupter via a flexible connection. The stationary end of the vacuum interrupter is electrically connected to the upper isolating contact arm. A sensor is installed within the sensor cavity. The disconnector switch is installed within the disconnector switch cavity, which has an upper chamber located between the upper and lower isolating contact arms and a lower chamber located below the lower isolating contact arm. The upper chamber has a transparent observation window.

[0012] Furthermore, the disconnecting switch includes an isolating contact arm, an insulating guide, and an isolating insulating pull rod. The isolating contact arm is slidably mounted on the lower isolating contact arm. The insulating guide is connected to the lower end of the isolating contact arm, and the isolating insulating pull rod is connected to the insulating guide. The insulating guide has a downwardly extending insulating cover, the shape of which matches the lower chamber.

[0013] Furthermore, the insulating housing includes a main housing, a silicone outer shell, and a transparent cover. The main housing securely seals the primary inlet contact arm, the vacuum interrupter, the upper isolation contact arm, the lower isolation contact arm, and the primary outlet contact arm. The transparent cover is assembled between the upper isolation contact arm and the lower isolation contact arm, and the silicone outer shell covers the outer surface of the main housing.

[0014] Furthermore, the sensor cavity is located between the circuit breaker cavity and the disconnector switch cavity.

[0015] The technical solution provided by this invention has the following beneficial effects:

[0016] When the circuit breaker drive shaft rotates to close or open, it drives the guide plate to move closer to or away from the isolating shaft. Specifically, when the circuit breaker drive shaft rotates to close, it drives the guide plate closer to the isolating shaft, placing the guide plate on the swing track of the isolating interlock limit crank arm. This restricts the swing of the isolating interlock limit crank arm, preventing the isolating shaft from rotating to close or open. In other words, when the vacuum circuit breaker is in the closed state, the isolating switch cannot operate.

[0017] When the circuit breaker drive shaft rotates to open, it drives the guide plate away from the isolating shaft, causing the guide plate to disengage from the swing track of the interlocking limit crank arm. The isolating shaft can then rotate normally without restriction, thereby controlling the opening and closing of the isolating switch.

[0018] Thus, by setting an interlocking mechanism between the circuit breaker drive shaft that controls the opening and closing of the circuit breaker and the isolation shaft that controls the opening and closing of the disconnecting switch, an interlock is formed between the vacuum circuit breaker and the disconnecting switch, resulting in a clever and simple structural layout. Attached Figure Description

[0019] Figure 1 The diagram shown illustrates the structure of the interlocking device between the circuit breaker and the disconnector in this embodiment. Figure 1 ;

[0020] Figure 2 The diagram shown illustrates the structure of the interlocking device between the circuit breaker and the disconnector in this embodiment. Figure 2 ;

[0021] Figure 3 The diagram shown illustrates the structure of the interlocking device between the circuit breaker and the disconnector in this embodiment. Figure 3 ;

[0022] Figure 4 The diagram shown is a structural schematic of the circuit breaker drive shaft in the embodiment.

[0023] Figure 5 The diagram shown is a schematic representation of the isolation shaft in the embodiment.

[0024] Figure 6 The diagram shown illustrates the first interlocking structure in the embodiment. Figure 1 ;

[0025] Figure 7 The diagram shown illustrates the first interlocking structure in the embodiment. Figure 2 ;

[0026] Figure 8 The diagram shown illustrates the first interlocking structure in the embodiment. Figure 3 ;

[0027] Figure 9 The diagram shown is a structural schematic of the isolation interlocking guide device in the embodiment;

[0028] Figure 10 The diagram shown illustrates the second interlocking structure in the embodiment. Figure 1 ;

[0029] Figure 11 The diagram shown illustrates the second interlocking structure in the embodiment. Figure 2 ;

[0030] Figure 12 The diagram shown illustrates the second interlocking structure in the embodiment. Figure 3 ;

[0031] Figure 13 The diagram shown is a structural schematic of the outdoor pole-mounted switch in the embodiment.

[0032] Figure 14 The diagram shown is a structural schematic of the circuit breaker pole in the embodiment;

[0033] Figure 15 The diagram shown is a schematic diagram of the circuit breaker pole in another embodiment. Detailed Implementation

[0034] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0035] Specifically, for ease of explanation, the description of the open or closed position of a component in this embodiment refers to the position of the component when the circuit breaker or disconnector linked to that component is in the open or closed state. Taking the circuit breaker drive shaft linked to the circuit breaker as an example, when the circuit breaker is in the open state, the position of the circuit breaker drive shaft is the open position; when the circuit breaker is in the closed state, the position of the circuit breaker drive shaft is the closed position.

[0036] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] Reference Figures 1 to 9As shown, this embodiment provides an interlocking device for a circuit breaker and a disconnecting switch, including a circuit breaker operating mechanism 120, a circuit breaker drive shaft 130, an disconnecting rotating shaft 140, an disconnecting interlocking guide device 170, and a limiting guide pin 175. The circuit breaker drive shaft 130 and the disconnecting rotating shaft 140 are rotatably configured, and the circuit breaker drive shaft 130 is also linked with the circuit breaker operating mechanism 120; that is, the circuit breaker drive shaft 130 realizes closing rotation or opening rotation through the circuit breaker operating mechanism 120. Specifically, closing rotation means rotating towards the closing position; opening rotation means rotating towards the opening position.

[0039] The isolation shaft 140 is provided with an isolation output crank arm 141 and an isolation interlocking limit crank arm 142, and the circuit breaker drive shaft 130 is provided with an input crank arm 131 and an isolation interlocking drive crank arm 134.

[0040] The isolation interlocking guide device 170 includes a guide plate 171 with a guide elongated hole 172. The limiting guide pin 175 is fixed to the housing 10 (specifically, fixed to the rotating shaft support frame 113) and passes through the guide elongated hole 172. That is, the movable range of the guide plate 171 is the range of relative movement between the guide elongated hole 172 and the limiting guide pin 175, which has a positioning function. The isolation interlocking drive crank arm 134 is connected to the first end of the guide plate 171, and the second end of the guide plate 171 corresponds to the isolation interlocking limiting crank arm 142.

[0041] When the circuit breaker drive shaft 130 rotates to close or open, it drives the guide plate 171 to move closer to or away from the isolating shaft 140. Specifically, when the circuit breaker drive shaft 130 rotates to close, it drives the guide plate 171 closer to the isolating shaft 140, placing the guide plate 171 on the swing track of the isolating interlock limit crank arm 142. This restricts the swing of the isolating interlock limit crank arm 142, preventing the isolating shaft 140 from rotating to close or open. More specifically, when the vacuum circuit breaker is in the closed state, the isolating switch cannot operate. Figure 6 , Figure 7 As shown. When the circuit breaker drive shaft 130 rotates to open, it drives the guide plate 171 away from the isolating shaft 140, causing the guide plate 171 to disengage from the swing track of the isolating interlock limit crank arm 142. The isolating shaft 140 is then unrestricted and can rotate normally to control the opening and closing of the isolating switch, as shown. Figure 8 As shown.

[0042] In a further preferred embodiment, to prevent the guide plate 171 from rigidly impacting the isolation interlocking limit crank arm 142 when the circuit breaker is suddenly operated while the disconnecting switch is still in motion (i.e., the circuit breaker drive shaft 130 is suddenly driven to rotate while the disconnecting shaft 140 is still rotating), the isolation interlocking guide device 170 in this specific embodiment further includes a return spring 174. The guide plate 171 also has an mounting elongated hole 173. The isolation interlocking drive crank arm 134 is movably connected to the mounting elongated hole 173 through a limit pin. The return spring 174 is assembled in the mounting elongated hole 173, with one end abutting against the guide plate 171 and the other end abutting against the limit pin. The reset spring 174 provides a certain buffering effect to the guide plate 171, thus effectively preventing the guide plate 171 from rigidly impacting the isolation interlocking limit crank arm 142. After the isolation switch finishes its operation (i.e., the isolation shaft 140 completes its rotation), the guide plate 171 automatically slides into the limit state under the action of the reset spring 174.

[0043] Specifically, the interlocking device between the circuit breaker and the disconnecting switch is installed inside a housing 110 (e.g., Figure 13 As shown), an operating box 100 is formed. More specifically, it also includes a tripping spring 151 and an oil buffer 152. The circuit breaker drive shaft 130 is also equipped with a buffer impact crank arm 132 and a tripping spring drive crank arm 133. One end of the tripping spring 151 is connected to the housing 110, and the other end is connected to the tripping spring drive crank arm 133. The oil buffer 152 is located on the opposite side of the tripping spring 151 and corresponds to the buffer impact crank arm 132. When the circuit breaker drive shaft 130 rotates to close (i.e., rotates towards the closing position), it compresses and stores energy in the tripping spring 151. In this specific embodiment, when the circuit breaker drive shaft 130 rotates counterclockwise, it rotates towards the closing position; when the circuit breaker drive shaft 130 rotates clockwise, it rotates towards the opening position.

[0044] Specifically, the circuit breaker operating mechanism 120 adopts an existing structure, including an energy storage motor 121, an energy storage spring 122, a closing holding section, and a tripping section. During operation, the energy storage motor 121 drives the circuit breaker drive shaft 130 to rotate to achieve the closing action, while simultaneously compressing the energy storage spring 122 to store energy. The closing rotation of the circuit breaker drive shaft 130 also compresses and stores energy in the opening spring 151. The closing holding section limits the circuit breaker drive shaft 130 when it has rotated to the closing position to maintain the closed state. The tripping section is linked to the closing holding section; by tripping the tripping section, the limiting of the closing holding section is released, thereby allowing the circuit breaker drive shaft 130 to rotate in the opening direction (i.e., rotate towards the opening position).

[0045] A tripping spring 151 and an oil buffer 152 are correspondingly provided on the circuit breaker drive shaft 130. When the circuit breaker drive shaft 130 rotates to close the circuit, the tripping spring 151 stores energy to provide the force for tripping rotation. In this specific embodiment, the force for tripping rotation of the circuit breaker drive shaft 130 is provided by the tripping spring 151 and the energy storage spring 122. Of course, in other embodiments, the structure of the energy storage spring 122 may not be provided, and the force may be provided directly by the tripping spring 151.

[0046] When the circuit breaker drive shaft 130 rotates during tripping, it is buffered by the oil buffer 152 and the buffer impact crank arm 132, resulting in a long mechanical life and simple structure.

[0047] Furthermore, in this embodiment, the housing 110 has a mechanism base plate 111, on which a rotating shaft support frame 113 and an oil buffer mounting frame 112 are fixed. The circuit breaker operating mechanism 120 is fixed to the mechanism base plate 111. The circuit breaker drive main shaft 130 and the isolation rotating shaft 140 are rotatably mounted on the circuit breaker operating mechanism 120 and the rotating shaft support frame 113. One end of the tripping spring 151 is connected to the mechanism base plate 111 of the housing 110. The oil buffer 152 is fixed to the oil buffer mounting frame 112. In this way, the various components are directly or indirectly assembled on the mechanism base plate 111, and only the mechanism base plate 111 needs to be reinforced, resulting in high stability. At the same time, the requirements for other side plates of the housing 110 can also be reduced.

[0048] The buffer impact crank arm 132 is equipped with an oil buffer impact wheel 1321. When the circuit breaker is tripped, the circuit breaker drive shaft 130 impacts the oil buffer 152 through the oil buffer impact wheel 1321 on the buffer impact crank arm 132, which can more effectively decompose and absorb excess energy of the operating mechanism.

[0049] An auxiliary switch 160 is also installed inside the housing 110. Specifically, the auxiliary switch 160 is mounted on the rotating shaft support frame 113, and an auxiliary switch drive crank arm 135 is also provided on the circuit breaker drive main shaft 130. The auxiliary switch drive crank arm 135 is linked with the auxiliary switch 160. In this way, the closing and opening operations can be indicated externally through the auxiliary switch 160.

[0050] Continue to refer to Figure 13 , Figure 14As shown, this embodiment also provides an outdoor pole-mounted switch, including an operating box 100 and a circuit breaker pole 200. The circuit breaker pole 200 is equipped with a vacuum interrupter 222 and a disconnector 230. The operating box is equipped with the interlocking device for the circuit breaker and the disconnector described above. The input crank arm 131 of the circuit breaker drive shaft 130 is connected to the circuit breaker insulation pull rod 2221 of the vacuum interrupter 222 (i.e., the vacuum circuit breaker), and the circuit breaker drive shaft 130 controls the closing and opening of the vacuum interrupter 222. The isolation output crank arm 141 of the isolation shaft 140 is connected to the isolation insulation pull rod 233 of the disconnector 230, and the isolation shaft 140 controls the closing and opening of the disconnector 230.

[0051] Furthermore, in this embodiment, the circuit breaker pole 200 includes an insulating housing 210 and a primary input contact arm 221, a vacuum interrupter 222, an upper isolation contact arm 223, a lower isolation contact arm 224, and a primary output contact arm 225, all fixed to the insulating housing 210. The insulating housing 210 also forms a circuit breaker cavity 2101, a sensor cavity 2102, and a disconnector switch cavity 2103. The circuit breaker cavity 2101 is equipped with a circuit breaker insulating pull rod 2221 that connects to the moving end of the vacuum interrupter 222. The opening / closing of the vacuum interrupter 222 is controlled by controlling the circuit breaker insulating pull rod 2221.

[0052] The primary input contact arm 221 is electrically connected to the moving end of the vacuum interrupter 222 via a flexible connection 227. The stationary end of the vacuum interrupter 222 is electrically connected to the upper isolation contact arm 223. Specifically, an isolation connection bar 228 is also sealed inside the insulating housing 210, and the stationary end of the vacuum interrupter 222 forms electrical contact with the upper isolation contact arm 223 via the isolation connection bar 228. The lower isolation contact arm 224 and the primary output contact arm 225 are electrically connected.

[0053] The sensor cavity 2102 is equipped with a sensor (in this specific embodiment, the outgoing line voltage sensor 242); the disconnecting switch cavity 2103 is equipped with a disconnecting switch 230, and the disconnecting switch cavity 2103 has an upper chamber 21031 located between the upper disconnecting contact arm 223 and the lower disconnecting contact arm 224 and a lower chamber 21032 located below the lower disconnecting contact arm 224; the upper chamber 21031 has a transparent observation window 2131.

[0054] It has the following beneficial effects:

[0055] 1. The vacuum interrupter 222 and the disconnector 230 are integrated into the same insulating housing 210, which has the functions of both circuit breaker and disconnector, and has a compact structure.

[0056] 2. A sensor cavity 2102 is also formed inside the insulating housing 210 for assembling a sensor, which can sense the parameters of the conductive circuit in real time, enabling the pole-mounted switch to have an intelligent switching function.

[0057] 3. The upper chamber 21031 of the disconnector switch cavity 2103 has a transparent observation window 2131, which allows for visual confirmation of the on / off status of the disconnector switch 230, facilitating on-site maintenance and repair.

[0058] In summary, this technology achieves multi-functional integration of pole-mounted switches, including miniaturization, intelligentization, visualization of disconnection switches, and full solid-encapsulated insulation of live parts.

[0059] Specifically, the insulating housing 210 also encapsulates a current sensor coil 226, which is sleeved on the outside of the primary input contact arm 221 and is used to sense the input current.

[0060] Furthermore, the insulating housing 210 includes a main housing 211, a silicone outer shell 212, and a transparent cover 213. The main housing 211 is integrally injection molded from thermoplastic engineering plastic; in this specific embodiment, it is cast from epoxy resin APG. The main housing 211 securely encapsulates the primary inlet contact arm 221, the vacuum interrupter 222, the upper isolation contact arm 223, the lower isolation contact arm 224, and the primary outlet contact arm 225. The transparent cover 213 is assembled between the upper isolation contact arm 223 and the lower isolation contact arm 224; therefore, the transparent cover 213 serves as a transparent observation window 2131. The silicone outer shell 212 covers the outer surface of the main housing 211, providing further outdoor protection and insulation, making it more suitable for outdoor use.

[0061] More specifically, the transparent observation window 2131 is made of tempered explosion-proof glass, that is, the transparent cover 213 is a tempered explosion-proof glass cover; the structure is stable. Of course, in other embodiments, the transparent observation window 2131 can also be made of other transparent and sturdy materials.

[0062] The disconnect switch 230 includes an isolation arm 231, an insulating guide 232, and an insulating pull rod 233. The isolation arm 231 is slidably mounted on the lower isolation arm 224. The insulating guide 232 is connected to the lower end of the isolation arm 231, and the insulating pull rod 233 is connected to the insulating guide 232. By pulling the insulating pull rod 233, the isolation arm 231 is moved up and down. When the isolation arm 231 moves up to simultaneously connect the upper isolation arm 223 and the lower isolation arm 224, the disconnect switch 230 is in a closed state, i.e., in the working state. When the isolation arm 231 moves down to disengage from the upper isolation arm 223, the disconnect switch 230 is in an open state, i.e., in the isolated state.

[0063] More specifically, in order to enable the isolation contact arm 231 to better form electrical contact with the upper isolation contact arm 223 and the lower isolation contact arm 224, in this embodiment, both the upper isolation contact arm 223 and the lower isolation contact arm 224 are provided with conductive spring contact fingers 229, and electrical contact is formed with the isolation contact arm 231 through the conductive spring contact fingers 229.

[0064] More specifically, in this embodiment, the insulating guide 232 has a downwardly extending insulating cover 2321. This insulating cover 2321 effectively isolates the electric arc and also prevents a large amount of external air or dust from flowing into the upper chamber 21031. The shape of the insulating cover 2321 matches the lower chamber 21032, so the insulating cover 2321 and the lower chamber 21032 can also play a guiding role, ensuring that the isolating contact arm 231 does not become eccentric or shifted when moving up and down rapidly.

[0065] The circuit breaker cavity 2101 is also equipped with an incoming line voltage sensor 241, which is in electrical contact with the primary incoming line contact arm 221. The incoming line voltage sensor 241 is used to collect power energy and voltage information on the incoming line side, and then output it to the control system for monitoring and judgment by the control system.

[0066] The sensor cavity 2102 is located between the circuit breaker cavity 2101 and the disconnector switch cavity 2103. This arrangement maximizes the distance between the vacuum interrupter 222 and the disconnector switch 230, resulting in better insulation and facilitating subsequent assembly and connection with the operating mechanism.

[0067] The sensor installed inside the sensor cavity 2102 is an outgoing line voltage sensor 242, which is in electrical contact with the lower isolation contact arm 224. The outgoing line voltage sensor 242 is used to collect power energy and voltage information on the outgoing line side, and then output it to the control system for monitoring and judgment by the control system.

[0068] In this specific embodiment, both the input-side voltage sensor 241 and the output-side voltage sensor 242 are electronic voltage sensors that combine high-voltage thick-film resistors and capacitors.

[0069] Of course, in other embodiments, the sensor assembled in the sensor cavity 2102 can also be other types of sensors, such as... Figure 15The diagram shows the incoming power sensor 243, which makes electrical contact with the primary incoming contact arm 221. Specifically, the incoming power sensor 243 achieves electrical contact with the primary incoming contact arm 221 through a conductive block 251, a high-voltage lead 252, and a flexible connection 227. That is, the incoming power sensor 243 is connected to the conductive block 251, the conductive block 251 is connected to the high-voltage lead 252, the high-voltage lead 252 is connected to the flexible connection 227, and the flexible connection 227 is connected to the primary incoming contact arm 221.

[0070] The incoming power sensor 243 is provided to provide power for the operation of the control terminal of the switchgear and data transmission. The incoming power sensor is a high-voltage ceramic capacitor voltage divider power sensor, which consists of a voltage divider device and a transformer module.

[0071] Example 2

[0072] This embodiment provides an interlocking device for a circuit breaker and a disconnecting switch, which is structurally similar to that of Embodiment 1, except that: (Continue referring to...) Figures 10 to 12 As shown, based on Embodiment 1, a second interlocking structure is added, namely, the circuit breaker operating mechanism 120 is provided with an energy storage holding crank arm 123 that is linked to the circuit breaker drive main shaft 130 and an isolation interlocking limit plate 124 that is linked to the isolation rotating shaft 140.

[0073] The position of the energy storage holding crank arm 123 when the circuit breaker drive main shaft 130 drives the vacuum circuit breaker to close is defined as the closed position of the energy storage holding crank arm 123; the position of the energy storage holding crank arm 123 when the circuit breaker drive main shaft 130 drives the vacuum circuit breaker to open is defined as the open position of the energy storage holding crank arm 123; the position of the isolation interlock limit plate 124 when the isolation shaft 140 drives the disconnecting switch to close is defined as the closed position of the isolation interlock limit plate 124; the position of the isolation interlock limit plate 124 when the isolation shaft 140 drives the disconnecting switch to open is defined as the open position of the isolation interlock limit plate 124.

[0074] The isolation interlocking limit plate 124 is offset from the energy storage holding crank arm 123 when it is in the open position and the closed position; for example Figure 10 When the central isolation interlock limit plate 124 is in the open position, such as Figure 11 The isolation interlock limit plate 124 is in the closed position; thus, when the disconnecting switch is closed or open, the isolation interlock limit plate 124 will not obstruct the movement of the energy storage holding crank arm 123, that is, the vacuum circuit breaker can realize the opening and closing operation.

[0075] like Figure 12As shown, the switching position of the isolating interlock limit plate 124 between the open and closed positions is located on the closing track of the energy storage holding crank arm 123. That is, when the isolating switch is in the process of switching between open and closed, the isolating interlock limit plate 124 is located on the closing track of the holding crank arm 123. At this time, the energy storage holding crank arm 123 cannot switch from the open position to the closed position, that is, the vacuum circuit breaker cannot perform the closing operation.

[0076] Thus, the interlocking device for the circuit breaker and disconnector provided in this embodiment can achieve interlocking between the vacuum circuit breaker and the disconnector, resulting in higher safety.

[0077] More specifically, the isolation interlocking limiting plate 124 is rotatably mounted, and a drive limiting crank arm 143 is provided on the isolation rotating shaft 140. The drive limiting crank arm 143 is connected to the isolation interlocking limiting plate 124 via a connecting rod 125. In this way, the linkage between the isolation rotating shaft 140 and the isolation interlocking limiting plate 124 is realized, resulting in a simple structure.

[0078] More specifically, an arc-shaped limiting hole 144 is formed on the drive limiting crank arm 143, and a limiting pin 145 passes through the arc-shaped limiting hole 144. In this way, the rotation limitation of the isolation shaft 140 can be achieved through the cooperation of the arc-shaped limiting hole 144 and the limiting pin 145.

[0079] The outdoor pole-mounted switch provided in this embodiment has a structure that is roughly the same as the outdoor pole-mounted switch provided in Embodiment 1, except that it adopts the interlocking device of circuit breaker and disconnector provided in this embodiment.

[0080] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. An interlocking device for a circuit breaker and disconnector, characterized in that: The circuit breaker operating mechanism, the circuit breaker transmission main shaft, the isolation rotating shaft, the isolation interlocking guide device and the limiting guide pin shaft are included, the circuit breaker transmission main shaft and the isolation rotating shaft are rotatably arranged, and the circuit breaker transmission main shaft is further linked with the circuit breaker operating mechanism; the isolation rotating shaft is provided with an isolation output crank arm and an isolation interlocking limiting crank arm, the circuit breaker transmission main shaft is provided with an input crank arm and an isolation interlocking driving crank arm, the isolation interlocking guide device includes a guide plate, the guide plate has a guide long slot, the limiting guide pin shaft is fixedly arranged and passes through the guide long slot, the isolation interlocking driving crank arm is connected to the first end of the guide plate, and the second end of the guide plate corresponds to the isolation interlocking limiting crank arm; when the circuit breaker transmission main shaft rotates to close or open, the guide plate is driven to move close to or away from the isolation rotating shaft. The isolation interlocking guide device further includes a reset spring, the guide plate further has a mounting long slot, the isolation interlocking driving crank arm is movably connected to the mounting long slot through a limiting pin, and the reset spring is assembled in the mounting long slot, one end of the reset spring abuts against the guide plate, and the other end of the reset spring abuts against the limiting pin; the rotation of the circuit breaker transmission main shaft drives the guide plate to move close to the isolation interlocking limiting crank arm through the reset spring, so that the guide plate forms elastic buffering contact with the isolation interlocking limiting crank arm, and after the isolation rotating shaft completes the rotation, the guide plate is automatically moved into the limiting state under the action of the reset spring; The circuit breaker operating mechanism is provided with an energy storage retaining crank arm linked with the circuit breaker transmission main shaft and an isolation interlocking limiting plate linked with the isolation rotating shaft, and the isolation interlocking limiting plate is staggered with the energy storage retaining crank arm when the isolation interlocking limiting plate is in the open position and in the closed position; The switching position of the isolation interlocking limiting plate between the open position and the closed position is on the closing track of the energy storage retaining crank arm.

2. The interlocking device of a circuit breaker and disconnector according to claim 1, characterized in that: The isolation interlocking limiting plate is rotatably arranged, the isolation rotating shaft is provided with a driving limiting crank arm, and the driving limiting crank arm is in transmission connection with the isolation interlocking limiting plate through a connecting rod.

3. The interlocking device of a circuit breaker and disconnector according to claim 2, characterized in that: An arc-shaped limiting hole is formed in the driving limiting crank arm, and a limiting pin shaft passes through the arc-shaped limiting hole.

4. An outdoor pole-mounted switch comprising an operating box and a circuit breaker pole, characterized by: The circuit breaker pole is provided with a vacuum interrupter and a disconnector, the operating box is provided with the interlocking device of the circuit breaker and the disconnector in any one of claims 1 to 3, the input crank arm of the circuit breaker transmission main shaft is connected with the circuit breaker insulation pull rod of the vacuum interrupter, and the isolation output crank arm of the isolation rotating shaft is connected with the isolation insulation pull rod of the disconnector.

5. The outdoor pole-mounted switch of claim 4, wherein: The circuit breaker pole column comprises an insulating shell and a primary incoming line contact arm, a vacuum arc-extinguishing chamber, an isolation upper contact arm, an isolation lower contact arm and a primary outgoing line contact arm fixedly sealed on the insulating shell; the insulating shell further forms a circuit breaker cavity, a sensor cavity and an isolator cavity, the circuit breaker cavity is provided with a circuit breaker insulating pull rod connected with a moving end of the vacuum arc-extinguishing chamber, the primary incoming line contact arm is in electrical contact with the moving end of the vacuum arc-extinguishing chamber through a flexible connection, a static end of the vacuum arc-extinguishing chamber is in electrical contact with the isolation upper contact arm, and a sensor is arranged in the sensor cavity; the isolator is assembled in the isolator cavity, and the isolator cavity has an upper cavity between the isolation upper contact arm and the isolation lower contact arm and a lower cavity below the isolation lower contact arm; The upper cavity is provided with a transparent observation window.

6. The outdoor pole-mounted switch of claim 5, wherein: The isolator comprises an isolation contact arm, an insulating guide and an isolation insulating pull rod, the isolation contact arm is slidably assembled on the isolation lower contact arm, the insulating guide is connected with a lower end of the isolation contact arm, and the isolation insulating pull rod is connected with the insulating guide; the insulating guide has a downwardly extending insulating cover, and the insulating cover is matched with the lower cavity in shape.

7. The outdoor pole-mounted switch of claim 5, wherein: The insulating shell comprises a main shell, a silica gel shell and a transparent cover, the main shell fixedly seals the primary incoming line contact arm, the vacuum arc-extinguishing chamber, the isolation upper contact arm, the isolation lower contact arm and the primary outgoing line contact arm; the transparent cover is assembled between the isolation upper contact arm and the isolation lower contact arm, and the silica gel shell covers an outer surface of the main shell.

8. The outdoor pole-mounted switch of claim 5, wherein: The sensor cavity is located between the circuit breaker cavity and the isolator cavity.

Images