A micro-motion electrical interlocking device for pole-mounted circuit breakers

Abstract

This utility model relates to the field of power application equipment technology, and provides a micro-motion electrical interlocking device for a pole-mounted circuit breaker, comprising: an insulating housing, an isolating stationary contact, an isolating moving contact, an isolating contact seat, an insulating pull rod, a control box, an isolating operating spindle, a crank plate, a connecting plate, a cam, a micro switch, a closing electromagnet, and a lever. The signal feedback terminal of the micro switch is connected to the power supply component of the closing electromagnet. When the other end of the lever touches the detection terminal of the micro switch, the power supply component of the closing electromagnet is energized; when the lever is disengaged from the detection terminal of the micro switch, the power supply component of the closing electromagnet is de-energized. Advantages: The opening and closing actions between the isolating stationary contact and the isolating moving contact occur within the insulating housing, which isolates external debris. In cases where the isolating switch is not fully closed or open, it prevents accidental triggering of the closing electromagnet, causing the vacuum interrupter to close.

Description

Technical Field

[0001] This utility model relates to the field of power application equipment technology, and specifically to a micro-motion electrical interlocking device for a pole-mounted circuit breaker. Background Technology

[0002] A pole-mounted circuit breaker (POP) is a high-voltage electrical device installed and operated on a utility pole, primarily used in outdoor power distribution systems. POP breakers control and protect power distribution networks, automatically disconnecting circuits in case of faults, such as overloads or short circuits. Equipped with a vacuum interrupter, it safely disconnects the circuit when current flows through, preventing arcing damage to equipment or fires. The vacuum interrupter is also known as a vacuum switch tube. The circuit breaker operating switch allows operators to manually open and close the vacuum interrupter. The opening and closing electromagnets, power supply components, and buttons are interconnected. When the button energizes the coil circuit of the opening and closing electromagnet, the electromagnet's contact rod extends, driving the vacuum switch operating mechanism to close the vacuum interrupter. When the button de-energizes the electromagnet's coil, the contact rod retracts, driving the vacuum switch operating mechanism to open the vacuum interrupter. The vacuum switch is electrically operated to open and close. Typically, pole-mounted circuit breakers are used in conjunction with disconnecting switches. The disconnecting switch is manually operated and is mainly used for circuit isolation and maintenance operations; the disconnecting switch provides a clear disconnection indicator to ensure safety during maintenance.

[0003] Traditional pole-mounted circuit breakers use disconnectors with knife-switch structures, which are exposed and easily accumulate debris. This makes the opening and closing actions of the disconnector susceptible to interference, resulting in lower stability and safety. For example, utility model patent document CN218866977U discloses a novel interlocking structure ZW32-12 pole-mounted vacuum circuit breaker integrated disconnector, comprising a base, operating shaft, crank arm, insulating pull rod, insulating support, moving contact, stationary contact, and conductive clamp. The base is fixed to one side of the circuit breaker housing, the insulating support is fixedly mounted on the base, the stationary contact is fixedly mounted on the upper end of the insulating support, one end of the moving contact is connected to the circuit breaker output terminal via the conductive clamp, and the other end engages with the stationary contact. One end of the insulating pull rod is connected to the moving contact, and the other end is connected to the crank arm on the operating shaft. The operating shaft has a handle for opening and closing, which is operated manually to achieve opening and closing. The disconnecting switch in this patent document is a knife switch structure, which is exposed.

[0004] Traditional pole-mounted circuit breakers also have the following drawbacks: When the moving and stationary contacts of the disconnecting switch are opened and closed by manually operating the opening and closing handle, if the closing or opening of the disconnecting switch is not completed, the button may be accidentally triggered, causing the opening and closing electromagnet to close the vacuum interrupter. This can easily create safety hazards and does not comply with the operating specifications of pole-mounted circuit breakers.

[0005] Therefore, in order to prevent the vacuum interrupter from closing due to the disconnector not being closed or open, there is an urgent need in this technical field for a micro-motion electrical interlocking device for pole-mounted circuit breakers. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a micro-motion electrical interlocking device for a pole-mounted circuit breaker.

[0007] The technical solution of this utility model is implemented as follows: a micro-motion electrical interlocking device for a pole-mounted circuit breaker, comprising: Insulating housing, stationary contact, moving contact, contact seat, insulating rod, control box, operating spindle, crank plate, connecting plate, cam, micro switch, opening and closing electromagnet, lever; The isolating stationary contact is fixedly connected to the top of the isolating insulating housing. A gate groove is provided at the lower end of the isolating stationary contact. The isolating contact seat is fixedly connected to the interior of the isolating insulating housing. A guide hole is provided in the isolating contact seat. The isolating moving contact is slidably connected to the guide hole. The lower end of the isolating moving contact is fixedly connected to the upper end of the insulating pull rod. The upper end of the isolating moving contact can be inserted into the gate groove. The isolating insulating housing is fixedly connected to the control box. The bottom of the isolating insulating housing communicates with the control box. The isolation operation spindle is rotatably connected to the control box, which is located inside the control box. One end of the crank plate is fixedly connected to the isolation operation spindle, and the other end of the crank plate is hinged to the lower end of the connecting plate. The upper end of the connecting plate is hinged to the lower end of the insulating pull rod. The center of the cam is fixedly connected to the isolation operation spindle. One end of the lever is fixedly connected to the cam. The micro switch is fixedly connected to the control box. The signal feedback terminal of the micro switch is connected to the power supply component of the opening and closing electromagnet. When the other end of the lever touches the detection terminal of the micro switch, the power supply component of the opening and closing electromagnet is energized. When the lever is disengaged from the detection terminal of the micro switch, the power supply component of the opening and closing electromagnet is de-energized.

[0008] Furthermore, it also includes: an interlock indicator light, which is located on the surface of the control box, and the interlock indicator light is connected to the micro switch via a signal line.

[0009] Furthermore, it also includes: a first conductive plate and a second conductive plate, the upper end of the isolating stationary contact is connected to the first wiring block through the first conductive plate, the surface of the isolating insulating housing is provided with a second wiring block, and the isolating contact seat is connected to the second wiring block through the second conductive plate.

[0010] Furthermore, the isolating contact seat is a split-type isolating contact seat, including a guide tube, a fixing plate, a sealing seat, and a spring contact finger. One end of the fixing plate is disposed between the guide tube and the sealing seat, and the other end of the fixing plate is provided with a mounting hole. The mounting hole is locked to the isolating insulating housing by screws. The guide tube is located below the sealing seat. The sealing seat has an annular groove inside, and the spring contact finger is installed in the annular groove. The isolating moving contact passes through the guide tube and the sealing seat. The other end of the fixing plate is also connected to the second wiring block through the second conductive plate.

[0011] Furthermore, an isolation operation handle is provided on the outside of the control box, and the control box is provided with a rotating hole. The isolation operation handle passes through the rotating hole and is fixedly connected to the isolation operation spindle.

[0012] Compared with the prior art, the beneficial effects or advantages of this utility model are as follows: the opening and closing actions between the isolating stationary contact and the isolating moving contact occur within the isolating insulating shell. The isolating moving contact moves linearly with the aid of the isolating contact seat. The structure is unique and ingenious. The isolating insulating shell isolates external debris, preventing interference with the opening and closing actions of the disconnecting switch, thus improving stability and safety. In cases where the disconnecting switch is not fully closed or partially opened, it prevents accidental triggering of the opening / closing electromagnet, which could cause the vacuum interrupter to close.

[0013] The vacuum switch and the disconnecting switch are locked by a micro-motion electrical interlocking device. The micro-motion switch is driven by the lever of the cam of the disconnecting operation spindle and is controlled by the rotation angle of the disconnecting operation spindle to switch states. When the disconnecting switch is not closed or not opened, this utility model prevents the vacuum switch from being closed by electric misoperation. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a three-dimensional schematic diagram of the external structure of the circuit breaker body, control box, and disconnecting switch device of this utility model.

[0016] Figure 2 This is a front plan view of the circuit breaker body, control box, and disconnecting switch device of this utility model.

[0017] Figure 3 yes Figure 2 Top view.

[0018] Figure 4 yes Figure 2 The left view.

[0019] Figure 5 yes Figure 4 A cross-sectional view along the AA direction.

[0020] Figure 6 yes Figure 5 A schematic diagram of the insertion of the moving isolating contact into the slot of the stationary isolating contact.

[0021] Figure 7 This is a three-dimensional schematic diagram of the external structure of the isolation contact seat of this utility model.

[0022] Figure 8 This is a schematic cross-sectional view of the internal structure of the isolation contact seat of this utility model.

[0023] Figure 9 This is a schematic cross-sectional view of the connection between the isolating moving contact and the insulating pull rod of this utility model.

[0024] Figure 10 This is a schematic diagram of the internal structure of the control box of this utility model.

[0025] Figure 11 yes Figure 10 Enlarged schematic diagram of the micro-motion electrical interlocking device.

[0026] Figure 12 This is a schematic diagram showing the connection of the isolation operation spindle, cam, micro switch, and lever of this utility model.

[0027] Figure 13 This is a connection diagram of the opening and closing electromagnet, power supply assembly, and button of this utility model.

[0028] Reference numerals: Circuit breaker body 1; Control box 11; Isolation operation spindle 111; Turning plate 112; Connecting plate 113; Isolation operation handle 114; Vacuum interrupter 12; First terminal block 13; Isolation switch device 2; Isolation insulating housing 21; Observation window 211; Second terminal block 212; Isolation stationary contact 22; Gate slot 221; Isolation moving contact 23; Isolation contact seat 24; Guide tube 241; Fixing plate 242; Sealing seat 243; Ring groove 2431; First conductive plate 25; Second conductive plate 26; Insulating pull rod 27; Cam 3; Micro-motion electrical interlocking device 4; Micro switch 41; Opening and closing electromagnet 42; Toggle lever 43; Button 44; Power supply assembly 45; Relay 46. Detailed Implementation

[0029] This utility model provides a micro-motion electrical interlocking device for a pole-mounted circuit breaker. The purpose of the micro-motion electrical interlocking device is to prevent the opening and closing electromagnets from being accidentally triggered to close the vacuum interrupter when the disconnecting switch is not closed or opened. It also protects the opening and closing actions of the disconnecting switch. The device is set inside the insulating housing to effectively prevent interference from external debris.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] See Figures 1 to 13 The preferred embodiment of this utility model.

[0032] A micro-motion electrical interlocking device for a pole-mounted circuit breaker includes: 21. Isolating insulating housing, 22. Isolating stationary contact, 23. Isolating moving contact, 24. Isolating contact seat, 27. Insulating pull rod, 11. Control box, 111. Isolating operating spindle, 112. Turning plate, 113. Cam, 3. Micro switch, 41. Opening and closing electromagnet, 42. Toggle lever, 43. The isolating stationary contact 22 is fixedly connected to the top of the isolating insulating housing 21. The lower end of the isolating stationary contact 22 is provided with a gate groove 221. The isolating contact seat 24 is fixedly connected to the interior of the isolating insulating housing 21. The isolating contact seat 24 is provided with a guide hole. The isolating moving contact 23 is slidably connected to the guide hole. The lower end of the isolating moving contact 23 is fixedly connected to the upper end of the insulating pull rod 27. The upper end of the isolating moving contact 23 can be inserted into the gate groove 221. The isolating insulating housing 21 is fixedly connected to the control box 11. The bottom of the isolating insulating housing 21 communicates with the control box 11. The isolation operation spindle 111 is rotatably connected to the control box 11, and the isolation operation spindle 111 is inside the control box 11. One end of the crank plate 112 is fixedly connected to the isolation operation spindle 111, and the other end of the crank plate 112 is hinged to the lower end of the connecting plate 113. The upper end of the connecting plate 113 is hinged to the lower end of the insulating pull rod 27. The center of the cam 3 is fixedly connected to the isolation operation spindle 111. One end of the lever 43 is fixedly connected to the cam 3. The micro switch 41 is fixedly connected to the control box 11. The signal feedback end of the micro switch 41 is connected to the power supply component of the opening and closing electromagnet 42. When the other end of the lever 43 touches the detection end of the micro switch 41, the power supply component of the opening and closing electromagnet 42 is energized. When the lever 43 is disengaged from the detection end of the micro switch 41, the power supply component of the opening and closing electromagnet 42 is de-energized.

[0033] The beneficial effects or advantages of this utility model are as follows: The opening and closing actions between the isolating stationary contact 22 and the isolating moving contact 23 occur within the isolating insulating housing 21. The isolating moving contact 23 moves linearly with the aid of the isolating contact seat 24. The structure is unique and ingenious. The isolating insulating housing 21 isolates external debris, preventing interference from debris during the opening and closing actions of the disconnecting switch, thus improving stability and safety. In the event that the disconnecting switch is not fully closed or partially opened, it prevents accidental triggering of the opening / closing electromagnet 42, which would cause the vacuum interrupter 12 to close.

[0034] The vacuum switch and the isolating switch are locked by the micro-motion electrical interlocking device 4. The micro-motion switch 41 is driven by the lever 43 of the cam 3 of the isolating operation main shaft. The state is switched by the rotation angle of the isolating operation main shaft. When the isolating switch is not closed or not opened, this utility model prevents the electric vacuum switch from being closed by mistake.

[0035] Operating procedures for pole-mounted circuit breakers: When disconnecting, first disconnect the vacuum switch (vacuum interrupter), then disconnect the isolating switch; when closing, first close the isolating switch, then close the vacuum switch (vacuum interrupter).

[0036] When the isolation operation spindle 111 rotates in the forward direction, the isolation moving contact 23 rises vertically and inserts into the gate slot 221 of the isolation stationary contact 22 through the transmission action of the crank plate 112, connecting plate 113, and insulating pull rod 27, thus performing a closing action; when the isolation operation spindle 111 rotates in the reverse direction, the isolation moving contact 23 falls vertically and disengages from the gate slot 221 of the isolation stationary contact 22 through the transmission action of the crank plate 112, connecting plate 113, and insulating pull rod 27, thus performing a opening action.

[0037] The vacuum interrupter 12, also known as a vacuum switch, has a vacuum switch operating mechanism 116 located inside the control box 11. The vacuum switch operating mechanism 116 is existing technology and drives the opening and closing of the vacuum interrupter 12 (vacuum switch).

[0038] The coil circuit of the closing / opening electromagnet 42 is connected to the power supply assembly 45 and the button 44, and the contact rod of the closing / opening electromagnet 42 is connected to the vacuum switch operating mechanism. When the power supply assembly 45 is energized, the button 44 energizes the coil circuit of the closing / opening electromagnet 42, at which time the contact rod of the closing / opening electromagnet 42 extends and drives the vacuum switch operating mechanism to close the vacuum switch; when the button 44 de-energizes the coil of the closing / opening electromagnet 42, the contact rod of the closing / opening electromagnet 42 shortens and drives the vacuum switch operating mechanism to open the vacuum switch. When the power supply assembly 45 is de-energized, the coil circuit of the closing / opening electromagnet 42 cannot be energized by the button 44, and therefore the vacuum switch cannot be closed electrically, thus improving safety.

[0039] There are two microswitches 41 and one lever 43. The lever 43 is located between the detection terminals of the two microswitches 41. The opening and closing rotation angle of the isolation operation spindle 111 is 80°. When the lever 43 touches the detection terminal of one of the microswitches 41, it indicates that the isolation switch is closed. When the lever 43 touches the detection terminal of the other microswitch 41, it indicates that the isolation switch is open. When the lever 43 is removed from the detection terminal of the microswitch 41, it indicates that the isolation switch is not closed or not open. At this time, the power supply component of the opening and closing electromagnet 42 is de-energized.

[0040] In another embodiment of the present invention, a PLC controller is provided between the micro switch 41 and the power supply assembly 45 of the opening and closing electromagnet 42; combined with Figure 13 The power supply assembly 45 has a relay 46 inside. One end of the power supply assembly 45 is connected to one end of the coil of the opening and closing electromagnet 42, and the other end of the power supply assembly 45 is connected to one end of the button 44. The other end of the button 44 is connected to the other end of the coil of the opening and closing electromagnet 42. When the detection terminal of the micro switch 41 is touched by the lever 43, the micro switch 41 sends a feedback signal to the PLC controller. When the lever 43 touches the detection terminal of the micro switch 41, the PLC controller controls the contacts of the relay 46 to close. When the lever 43 leaves the detection terminal of the micro switch 41, the PLC controller controls the contacts of the relay 46 to open. When the contacts of the relay 46 are open, the wire between the power supply component 45 and the coil circuit of the opening and closing electromagnet 42 is disconnected, and the coil circuit of the opening and closing electromagnet 42 cannot be energized by the button 44. When the contacts of the relay 46 are closed, the wire between the power supply component 45 and the coil circuit of the opening and closing electromagnet 42 is connected, and the coil circuit of the opening and closing electromagnet 42 can be energized or de-energized by the button 44.

[0041] Furthermore, it also includes: an interlock indicator light, which is located on the surface of the control box 11, and the interlock indicator light is connected to the micro switch 41 via a signal line.

[0042] The beneficial effects of this technical solution are: the interlocking indicator light helps to remind staff whether the power supply components of the current opening and closing electromagnet are energized.

[0043] Furthermore, it also includes: a first conductive plate 25 and a second conductive plate 26, the upper end of the isolating stationary contact 22 is connected to the first wiring block 13 through the first conductive plate 25, the surface of the isolating insulating housing 21 is provided with a second wiring block 212, and the isolating contact seat 24 is connected to the second wiring block 212 through the second conductive plate 26.

[0044] The interior of the vacuum interrupter 12 houses the moving and stationary contacts of the circuit breaker, which is existing technology. A first terminal block 13 is located on the top of the vacuum interrupter 12; after the disconnecting switch 2 closes, the first terminal block 13 and the second terminal block 212 can be energized. The second terminal block 212 is used to connect to an external power source. There are three vacuum interrupters 12 and three disconnecting switch 2 units, each used to connect to three-phase power.

[0045] Furthermore, the isolating contact seat 24 is a split isolating contact seat 24, including a guide tube 241, a fixing plate 242, a sealing seat 243, and a spring contact finger. One end of the fixing plate 242 is disposed between the guide tube 241 and the sealing seat 243, and the other end of the fixing plate 242 is provided with a mounting hole. The mounting hole is locked to the isolating insulating housing 21 by screws. The guide tube 241 is located below the sealing seat 243. The sealing seat 243 is provided with an annular groove 2431 inside. The spring contact finger is installed in the annular groove 2431. The isolating moving contact 23 passes through the guide tube 241 and the sealing seat 243. The other end of the fixing plate 242 is also connected to the second wiring block 212 through the second conductive plate 26.

[0046] The beneficial effects of this technical solution are: it facilitates the assembly of the isolating contact seat 24 onto the isolating insulating housing 21 by the operators, improving assembly efficiency. Specifically, the sealing seat 243 has two annular grooves 2431 inside, each housing a spring-loaded contact finger. Through the radial deformation of the spring-loaded contact fingers, an effective conductive connection is maintained between the sealing seat 243 and the isolating moving contact 23. A sealing treatment is applied between the sealing seat 243 and the isolating insulating housing 21.

[0047] Furthermore, an isolation operation handle 114 is provided on the outside of the control box 11, and the control box 11 is provided with a rotating hole. The isolation operation handle 114 passes through the rotating hole and is fixedly connected to the isolation operation spindle 111.

[0048] The beneficial effects of this technical solution are: it facilitates the operation of the isolation moving contact 23 and the isolation stationary contact 22 by the operator using the isolation operating handle 114 to drive the isolation operating spindle 111.

[0049] The insulating housing 21 is provided with an observation window 211, which is located between the insulating stationary contact 22 and the insulating contact seat 24. The observation window 211 has a transparent plate, and a sealing ring is provided between the transparent plate and the insulating housing 21. The transparent plate is a tempered glass plate.

[0050] This utility model discloses a micro-motion electrical interlocking device 4 for a pole-mounted circuit breaker, applied to the pole-mounted circuit breaker. The circuit breaker body 1 includes a control box 11 and a vacuum interrupter 12. The bottom of the vacuum interrupter 12 is fixedly connected to the control box 11, and a first terminal block 13 is provided on the top of the vacuum interrupter 12. The moving contact and stationary contact of the circuit breaker are installed inside the vacuum interrupter 12, which is prior art. After the disconnecting switch 2 completes closing, the first terminal block 13 and the second terminal block 212 can be energized. The second terminal block 212 is used to connect to an external power source.

[0051] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A micro-motion electrical interlocking device for a pole-mounted circuit breaker, characterized in that, include: Insulating housing, stationary contact, moving contact, contact seat, insulating rod, control box, operating spindle, crank plate, connecting plate, cam, micro switch, opening and closing electromagnet, lever; The isolating stationary contact is fixedly connected to the top of the isolating insulating housing. A gate groove is provided at the lower end of the isolating stationary contact. The isolating contact seat is fixedly connected to the interior of the isolating insulating housing. A guide hole is provided in the isolating contact seat. The isolating moving contact is slidably connected to the guide hole. The lower end of the isolating moving contact is fixedly connected to the upper end of the insulating pull rod. The upper end of the isolating moving contact can be inserted into the gate groove. The isolating insulating housing is fixedly connected to the control box. The bottom of the isolating insulating housing communicates with the control box. The isolation operation spindle is rotatably connected to the control box, which is located inside the control box. One end of the crank plate is fixedly connected to the isolation operation spindle, and the other end of the crank plate is hinged to the lower end of the connecting plate. The upper end of the connecting plate is hinged to the lower end of the insulating pull rod. The center of the cam is fixedly connected to the isolation operation spindle. One end of the lever is fixedly connected to the cam. The micro switch is fixedly connected to the control box. The signal feedback terminal of the micro switch is connected to the power supply component of the opening and closing electromagnet. When the other end of the lever touches the detection terminal of the micro switch, the power supply component of the opening and closing electromagnet is energized. When the lever is disengaged from the detection terminal of the micro switch, the power supply component of the opening and closing electromagnet is de-energized.

2. The micro-motion electrical interlocking device for a pole-mounted circuit breaker according to claim 1, characterized in that, Also includes: An interlock indicator light is located on the surface of the control box and is connected to the micro switch via a signal line.

3. The micro-motion electrical interlocking device for a pole-mounted circuit breaker according to claim 1, characterized in that, Also includes: A first conductive plate and a second conductive plate are provided. The upper end of the isolating stationary contact is connected to the first wiring block through the first conductive plate. A second wiring block is provided on the surface of the isolating insulating shell. The isolating contact seat is connected to the second wiring block through the second conductive plate.

4. The micro-motion electrical interlocking device for a pole-mounted circuit breaker according to claim 3, characterized in that, The isolating contact seat is a split-type isolating contact seat, including a guide tube, a fixing plate, a sealing seat, and a spring contact finger. One end of the fixing plate is disposed between the guide tube and the sealing seat, and the other end of the fixing plate is provided with a mounting hole. The mounting hole is locked to the isolating insulating housing by screws. The guide tube is located below the sealing seat. The sealing seat has an annular groove inside, and the spring contact finger is installed in the annular groove. The isolating moving contact passes through the guide tube and the sealing seat. The other end of the fixing plate is also connected to the second wiring block through the second conductive plate.

5. The micro-motion electrical interlocking device for a pole-mounted circuit breaker according to claim 1, characterized in that, An isolation operation handle is provided on the outside of the control box. The control box is provided with a rotating hole. The isolation operation handle passes through the rotating hole and is fixedly connected to the isolation operation spindle.

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