Circuit breaker anti-closing locking mechanism with feedback

Abstract

The utility model discloses a circuit breaker anti-closing locking mechanism with feedback. The circuit breaker anti-closing locking mechanism comprises a lock catch, a shifting stop shaft, a power module and a signal feedback module which are arranged in a circuit breaker body, the shifting stop shaft is rotationally arranged in the circuit breaker body and can selectively enter a limiting position or a releasing position; when the shifting stop shaft is located at the limiting position, the shifting stop shaft can interfere with the lock catch. When the shifting stop shaft is in the release position, the shifting stop shaft can be separated from the lock catch; the power module is in transmission connection with the shifting stop shaft; and the signal feedback module can output an electronic trigger signal representing that the shifting stop shaft is located at the closing allowing position when the shifting stop shaft is located at the release position. The circuit breaker has the following advantages and effects: the circuit breaker body can actively output an electronic trigger signal to an interlocking control system when the circuit breaker body is in the allowable closing position, so that closed-loop detection and control of an interlocking state are realized, and automation and reliability are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a circuit breaker anti-closing interlocking mechanism with feedback. Background Technology

[0002] In multi-power supply systems such as those used in ships and power plants, complex interlocking control systems are typically required to prevent serious accidents caused by irregular operations (such as unplanned parallel connection of shore power and generator sets, or erroneous connection between different power sources via jumper switches). The core function of the interlocking control system is to monitor the opening and closing status of each circuit breaker in real time and, based on strict logical rules (such as avoiding parallel connection of shore power with multiple generator sets, limiting the conversion time of short-term parallel connection between a single generator and shore power, and prohibiting power conversion via jumper switches), implement interlocking or emergency disconnection control on relevant circuit breakers to ensure power supply safety and stability.

[0003] A key foundation for achieving the aforementioned high-level interlocking functions lies in the fact that each controlled circuit breaker (such as a generator circuit breaker, shore power circuit breaker, or jumper circuit breaker) within the interlocking control system must be equipped with a low-level actuator capable of receiving interlocking commands, executing physical locking / releasing actions, and proactively and reliably providing feedback to the interlocking control device on the exact "allowed closing" status after the locking is released. However, existing technologies, such as the patent application CN202421388145.9 which discloses a circuit breaker anti-closing locking mechanism and circuit breaker with feedback, can only achieve basic "locking" functions and have a core flaw: they cannot provide a clear, unambiguous, and electrically identifiable status confirmation signal to the interlocking control system when the locking condition is released and closing is permitted. This means that the interlocking control system can only output locking commands but cannot automatically verify whether the commands have been correctly executed and the system has entered the "allowed closing" ready state. The final state judgment of the interlocking control system still relies on manual inspection, which not only reduces the level of automation and response speed, but also leaves hidden dangers for misoperation, making it difficult to meet the interlocking protection requirements of modern ships and power plants for high reliability and full-state monitoring.

[0004] Therefore, there is an urgent need for a circuit breaker anti-closing interlocking mechanism with feedback. It can not only act as a reliable execution unit to respond to the interlocking and release commands of the interlocking control system and achieve physical obstruction, but also has built-in status feedback capability, which can accurately generate electronic trigger signals at the release position, thereby providing the status feedback necessary for closed-loop control of the upper interlocking device, fundamentally improving reliability and intelligence. Utility Model Content

[0005] The purpose of this invention is to provide a circuit breaker anti-closing interlocking mechanism with feedback to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A circuit breaker anti-closing interlocking mechanism with feedback includes a latch disposed within the circuit breaker body and which opens or closes the circuit by rotation. The circuit breaker body contains a toggle switch, a power module, and a signal feedback module. The toggle switch is rotatably disposed within the circuit breaker body. When driven to rotate, the toggle switch can selectively enter a restricted position or a released position. When the toggle switch is in the restricted position, it interferes with the latch to physically prevent the latch from rotating in the closing direction. When the toggle switch is in the released position, it disengages from the latch, allowing the latch to rotate freely to the closed position.

[0008] The power module is connected to the toggle switch shaft and is used to provide rotational driving force for the toggle switch shaft to switch between the restricted position and the released position.

[0009] The signal feedback module can output an electronic trigger signal indicating that the toggle switch is in the closed position when the toggle switch is in the released position.

[0010] By adopting the above technical solution, closed-loop detection and control of the interlocking status is realized; the toggle switch shaft can be accurately switched to the limit position or the release position under the drive of the power module, thereby reliably physically blocking or allowing the closing action and ensuring that the interlocking command is effectively executed; at the same time, the signal feedback module can actively output an electronic trigger signal when the toggle switch shaft reaches the release position, providing clear status feedback to the interlocking control system, avoiding reliance on manual confirmation, and significantly improving the automation level, operational reliability and safety monitoring capability of the circuit breaker.

[0011] A further configuration is as follows: the power module has a post-stage output tooth, which is rotatably disposed within the circuit breaker body and located to the side of the signal feedback module; a follow-trigger block is fixedly disposed on the tooth disk plane of the post-stage output tooth at a position offset from its rotation center; the signal feedback module has a sensing unit.

[0012] When the power module drives the toggle shaft to rotate to the release position, it will synchronously drive the output gear of the subsequent stage to rotate, so that it moves with the trigger block to the sensing part of the signal feedback module, thereby triggering the signal feedback module to generate the electronic trigger signal.

[0013] By adopting the above technical solution, a mechanical synchronous triggering mechanism between the position of the toggle switch shaft and the signal feedback module is realized. When the toggle switch shaft rotates to the release position, the output teeth of the subsequent stage drive the follow-up trigger block to accurately align with the sensing part, ensuring that the generation of the electronic trigger signal strictly corresponds to the release of the mechanical position, eliminating the possibility of false alarms or delays, enhancing the real-time performance and accuracy of the status feedback, and providing a reliable position confirmation signal for the interlocking control system.

[0014] A further setting is that the signal feedback module adopts a non-locking micro switch, and the follower trigger block causes the signal feedback module to generate the electronic trigger signal by squeezing the sensing part of the signal feedback module.

[0015] By adopting the above technical solution, a non-self-locking micro switch is used as the signal feedback module, which has a simple structure, fast response and high reliability. The follow-up trigger block triggers the micro switch by physical squeezing, ensuring that an electronic signal is only generated when the toggle shaft reaches the release position. Once the contact is broken, the signal disappears, avoiding misjudgment of the state that may be caused by signal self-locking. This makes the state feedback instantaneous and clear, further improving the accuracy of the interlocking control system.

[0016] A further setting is: the power module has a middle section output tooth, the middle section output tooth is rotatably disposed in the circuit breaker body and close to the toggle shaft, and a protrusion is fixedly disposed on the tooth disk plane of the middle section output tooth at the position of the rotation center;

[0017] When the middle output tooth rotates under the drive of the power module, the protrusion on it will contact the toggle switch shaft to push the toggle switch shaft into the release position.

[0018] By adopting the above technical solution, a compact and direct drive method for the toggle shaft is provided through the output teeth in the middle section and the protrusions thereon. When the protrusions rotate with the output teeth in the middle section, they can accurately drive the toggle shaft to rotate, realizing stable switching between the limit position and the release position. The mechanical transmission efficiency is high and the operation is reliable.

[0019] A further configuration is as follows: the power module includes a servo motor, a worm gear, a worm, and a transmission gear set. The servo motor is fixed inside the circuit breaker body. The worm is connected to the output of the servo motor. The worm gear is rotatably mounted on the circuit breaker body and forms a transmission with the worm. The transmission gear set is rotatably mounted on the circuit breaker body and forms a transmission with the worm gear. The transmission gear set provides rotational driving force to the intermediate output teeth.

[0020] The middle stage output tooth meshes with the subsequent stage output tooth.

[0021] By adopting the above technical solution, a smooth, precise, and self-locking rotary driving force is provided; the worm gear transmission has a large reduction ratio and reverse self-locking capability, which can prevent the shifting shaft from being accidentally displaced when there is no power, thus enhancing the stability and safety of the device; the transmission gear set further transmits power to the middle output teeth and the rear output teeth, realizing the synchronous coordination of shifting shaft position control and signal triggering.

[0022] A further feature is that the actuating stop shaft has a guide angle portion pointing towards the latch side, and the lower end of the guide angle portion has an arc-shaped limiting surface that can interfere with the latch.

[0023] By adopting the above technical solutions, the reliability and mechanical life of the blocking mechanism are enhanced, ensuring that closing operations can be effectively prevented when interlocking is required.

[0024] A further feature is that the actuating stop shaft has a contact portion near the protrusion.

[0025] By adopting the above technical solution, the rotation of the toggle shaft is stably driven based on the cooperation between the protrusion and the contact part.

[0026] A further configuration is as follows: the actuating stop shaft has a horizontal force-bearing part at the other end relative to the guide angle; a receiving seat is fixedly installed inside the circuit breaker body; the receiving seat has an opening facing the force-bearing part; an electromagnet is installed inside the receiving seat; the electromagnet core extends out of the opening of the receiving seat and connects with the force-bearing part.

[0027] By adopting the above technical solution, the movement of the electromagnet core is controlled by energizing the electromagnet. The electromagnet core presses against the toggle shaft, thereby providing a reset force for the toggle shaft. This ensures that the lock can fit tightly in the limit position, enhancing the blocking effect. In the locked state, it can reliably resist the closing operation force, further improving the mechanical reliability and anti-interference capability of the device.

[0028] In summary, this utility model has the following beneficial effects: it enables the circuit breaker body to actively output an electronic trigger signal to the interlocking control system when it is in the allowable closing position, thereby realizing closed-loop detection and control of the interlocking state and effectively improving automation and reliability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0030] Figure 2 This is a schematic diagram illustrating the engagement of the shifting stop shaft, the middle output tooth, and the protrusion in the embodiment.

[0031] In the diagram: 11. Lock; 21. Actuating stop shaft; 211. Guide angle; 2111. Arc-shaped limiting surface; 212. Contact part; 213. Force-bearing part; 31. Signal feedback module; 41. Post-stage output tooth; 42. Follow-up trigger block; 51. Mid-stage output tooth; 52. Protrusion; 61. Servo motor; 62. Worm gear; 71. First transmission tooth; 72. Second transmission tooth; 73. Third transmission tooth; 81. Receiving seat; 82. Electromagnet. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown;

[0034] This embodiment discloses a circuit breaker anti-closing interlocking mechanism with feedback. The core of the mechanism is to add a controllable mechanical blocking structure and a corresponding state feedback structure inside the conventional circuit breaker body, which can physically prevent the circuit breaker from closing when needed, and provide a precise electronic trigger signal when closing is allowed.

[0035] The circuit breaker body is equipped with a latch 11 that performs opening or closing operations by rotation. This embodiment specifically includes a rotatable toggle shaft 21, a power module that provides power to the toggle shaft 21, and a signal feedback module 31 for status detection.

[0036] The toggle switch shaft 21 is rotatably mounted inside the circuit breaker body, and its rotation is controlled by the power module. The toggle switch shaft 21 has two defined operating positions:

[0037] One is the limit position: when the toggle switch 21 is rotated to the limit position, it will enter the rotation path of the latch 11 and physically interfere with the latch 11. When the latch 11 attempts to rotate in the closing direction, it will be blocked by the toggle switch 21, thus preventing the closing operation from being completed.

[0038] Secondly, the release position: When the toggle switch 21 rotates from the limit position to the release position, it will completely disengage from the rotation path of the latch 11 and will no longer interfere with the latch 11. At this time, the latch 11 can rotate freely, and the circuit breaker body can close normally.

[0039] The power module is fixed inside the circuit breaker body, and its output terminal is connected to the toggle switch shaft 21. The power module receives external control commands (such as electrical signals from remote or local interlocking control systems) and generates rotational driving force accordingly to drive the toggle switch shaft 21 to switch accurately between the limit position and the release position.

[0040] The signal feedback module 31 is also installed inside the circuit breaker body. Its function is to detect whether the toggle switch 21 has indeed reached the release position. Once the toggle switch 21 is detected to be in the release position, the signal feedback module 31 will immediately output an electronic trigger signal. This signal can be transmitted to the interlocking control system as a "closing permitted" status confirmation for interlocking control, status indication, or operation recording.

[0041] The power module adopts a motor-driven, gear-transmission system, including a servo motor 61, a worm gear, a worm wheel 62, a transmission gear set, an intermediate output gear 51, and a final output gear 41. The servo motor 61 is fixedly installed inside the circuit breaker body, and its output shaft is connected to a worm gear (not shown in the figure). The worm wheel 62 is rotatably located inside the circuit breaker body and is connected to the worm gear. After the worm wheel 62 rotates, it can drive the transmission gear set, which consists of multiple meshing gears, specifically including a first transmission gear 71, a second transmission gear 72, and a third transmission gear 73. The first transmission gear 71 is fixed to the worm wheel 62, the second transmission gear 72 is rotatably located inside the circuit breaker body, and the third transmission gear 73 is fixed to the second transmission gear 72. The second transmission gear 72 meshes with the intermediate output gear 51, and the third transmission gear 73 meshes with the first transmission gear 71, thus forming a transmission chain. The output of the transmission gear assembly drives the intermediate output gear 51 to rotate. The intermediate output gear 51 is also rotatably mounted inside the circuit breaker body, and its installation position is close to the toggle stop shaft 21. At the rotation center position on the gear disk plane of the intermediate output gear 51, a protruding bump 52 is fixedly installed. The bump 52 rotates together with the intermediate output gear 51 and can contact the toggle stop shaft 21, thus pushing the toggle stop shaft 21 to rotate and enter the release position. The subsequent output gear 41 directly meshes with the intermediate output gear 51. The subsequent output gear 41 is also rotatably mounted inside the circuit breaker body, and its installation position is located to the side of the signal feedback module 31. On the gear disk plane of the subsequent output gear 41, offset from its rotation center, a following trigger block 42 is fixedly installed. This following trigger block 42 can be any shape that can trigger a signal, such as a cylindrical pin or a boss.

[0042] The toggle switch 21 is an irregularly shaped switch body, specifically comprising three functional parts:

[0043] One is the guide angle 211, which points towards and is close to the latch 11, and has an arc-shaped limiting surface 2111 at its lower end. When the toggle stop shaft 21 is in the limiting position, this arc-shaped limiting surface 2111 is exactly on the trajectory of the latch 11 rotating in the closing direction, forming a physical block.

[0044] Secondly, there is the contact part 212, which is close to the protrusion 52. Its function is to contact the protrusion 52 to make the entire toggle stop shaft 21 rotate, thereby driving the toggle stop shaft 21 into the release position.

[0045] Thirdly, the force-bearing part 213 is located at the other end of the actuating stop shaft 21 relative to the guide angle part 211.

[0046] To ensure a stable trend of the actuating stop shaft 21 under non-forced drive, a receiving seat 81 is fixedly installed inside the circuit breaker body. The receiving seat 81 has an opening that faces the force-bearing part 213 of the actuating stop shaft 21. An electromagnet 82 is installed inside the receiving seat 81, and the iron core of the electromagnet 82 can extend out of the opening and press against the force-bearing part 213 of the actuating stop shaft 21. The movement of the electromagnet core is controlled by energizing the electromagnet 82. The iron core of the electromagnet 82 presses against the actuating stop shaft 21, thereby providing a reset force for the actuating stop shaft 21, ensuring that it can tightly fit the latch in the restricted position, enhancing the blocking effect, and thus reliably resisting the closing operation force in the locked state. When the actuating stop shaft 21 needs to rotate from the restricted position to the released position, the electromagnet is de-energized to demagnetize it, thereby avoiding obstruction of the normal rotation of the actuating stop shaft 21.

[0047] It should be noted that in order to stabilize the toggle switch shaft 21 in the released position and enable the latch 11 to close normally, the self-locking characteristics of the worm gear 62 and the worm can be used; or the servo motor 61 can be kept running to output a static holding torque.

[0048] In this embodiment, the signal feedback module 31 uses a non-locking microswitch, which is fixed to the circuit breaker body and has a spring or button that can be physically pressed, which is its sensing part. The circuit wiring of the microswitch is led out to the outside of the circuit breaker and connected to the interlocking control system for outputting an electronic trigger signal.

[0049] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A circuit breaker anti-closing interlocking mechanism with feedback, comprising a latch (11) disposed within the circuit breaker body and which opens or closes the circuit breaker by rotation; characterized in that: The circuit breaker body is provided with a toggle stop shaft (21), a power module and a signal feedback module (31); the toggle stop shaft (21) is rotatably disposed in the circuit breaker body. When the toggle stop shaft (21) is driven to rotate, it can selectively enter the limit position or the release position; when the toggle stop shaft (21) is in the limit position, it can interfere with the latch (11) to physically block the latch (11) from rotating in the closing direction; when the toggle stop shaft (21) is in the release position, it can disengage from the latch (11) and allow the latch (11) to rotate freely to the closing position; The power module is connected to the toggle switch shaft (21) and is used to provide rotational driving force for the toggle switch shaft (21) to switch between the restricted position and the released position; The signal feedback module (31) can output an electronic trigger signal indicating that the toggle switch (21) is in the closed position when the toggle switch (21) is in the released position.

2. The circuit breaker anti-closing interlocking mechanism with feedback according to claim 1, characterized in that: The power module has a post-stage output tooth (41), which is rotatably disposed in the circuit breaker body and located on the side of the signal feedback module (31). A follower trigger block (42) is fixedly disposed on the tooth disk plane of the post-stage output tooth (41) at a position offset from its rotation center. The signal feedback module (31) has a sensing part. When the power module drives the toggle shaft (21) to rotate to the release position, it will synchronously drive the output gear (41) to rotate, so that the follower trigger block (42) moves to the sensing part of the signal feedback module (31), thereby triggering the signal feedback module (31) to generate the electronic trigger signal.

3. The circuit breaker anti-closing interlocking mechanism with feedback according to claim 2, characterized in that: The signal feedback module (31) adopts a non-locking micro switch. The follower trigger block (42) causes the signal feedback module (31) to generate the electronic trigger signal by squeezing the sensing part of the signal feedback module (31).

4. The circuit breaker anti-closing interlocking mechanism with feedback according to claim 2, characterized in that: The power module has a mid-section output tooth (51), which is rotatably mounted in the circuit breaker body and close to the toggle shaft (21). On the tooth disk plane of the mid-section output tooth (51), a protrusion (52) is fixedly mounted at the rotation center. When the mid-section output tooth (51) rotates under the drive of the power module, the protrusion (52) on it will contact the toggle stop shaft (21) to push the toggle stop shaft (21) into the release position.

5. A circuit breaker anti-closing interlocking mechanism with feedback according to claim 4, characterized in that: The power module includes a servo motor (61), a worm gear (62), a worm, and a transmission gear set. The servo motor (61) is fixed inside the circuit breaker body. The worm is connected to the output of the servo motor (61). The worm gear (62) is rotatably mounted on the circuit breaker body and forms a transmission with the worm. The transmission gear set is rotatably mounted on the circuit breaker body and forms a transmission with the worm gear (62). The transmission gear set provides rotational driving force to the intermediate output gear (51). The mid-stage output tooth (51) meshes with the rear-stage output tooth (41).

6. The circuit breaker anti-closing interlocking mechanism with feedback according to claim 1, characterized in that: The actuating stop shaft (21) has a guide angle (211) pointing towards the latch (11), and the lower end of the guide angle (211) has an arc-shaped limiting surface (2111) that can interfere with the latch (11).

7. The circuit breaker anti-closing interlocking mechanism with feedback according to claim 1, characterized in that: The actuating stop shaft (21) has a contact portion (212) near the protrusion (52).

8. A circuit breaker anti-closing interlocking mechanism with feedback according to claim 6, characterized in that: The actuating stop shaft (21) has a horizontal force-bearing part (213) at the other end relative to the guide angle part (211). A receiving seat (81) is fixedly installed inside the circuit breaker body. The receiving seat (81) has an opening facing the force-bearing part (213). An electromagnet (82) is installed inside the receiving seat (81). The iron core of the electromagnet (82) extends out of the opening of the receiving seat (81) and connects with the force-bearing part (213).

Images