A short-circuit identification opening structure

Abstract

The utility model discloses a kind of identification short-circuit opening structure, including tripping lever and acquisition control circuit board. Tripping lever tail is equipped with trigger part, and corresponding signal trigger switch is equipped on acquisition control circuit board. When short-circuit opening occurs, tripping lever is pushed to rotate by push rod, and the trigger part of its tail moves and triggers signal trigger switch, generates short-circuit opening indication signal;Acquisition control circuit board receives and uploads the signal. The utility model directly triggers signal using the mechanical action of short-circuit opening, and identification is accurate and reliable, can effectively distinguish short-circuit opening and manual opening, and timely reports and reminds line maintenance, structure is simple, cost is low, and the intelligent level and safety of product are improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical protection technology, and in particular to a short-circuit tripping structure. Background Technology

[0002] Electromagnetic closing and tripping mechanisms are widely used in various electrical switchgear to realize the closing and opening operations of circuits, especially in the event of short circuits or other faults where rapid tripping is required to protect lines and equipment. While existing electromagnetic closing and tripping mechanisms can achieve short-circuit protection, a significant problem exists: the short-circuit protection tripping current is instantaneous and brief, making it difficult for the control board to reliably collect and distinguish whether the tripping is a normal manual tripping operation or a protective tripping caused by a short-circuit fault in unattended situations.

[0003] Short-circuit tripping signifies a serious fault on the line, requiring maintenance to prevent recurrence or escalation. If the cause of the tripping cannot be determined, users or maintenance personnel may mistakenly attribute it to normal operation or other minor issues, failing to promptly address the line and creating potential safety hazards. Therefore, there is an urgent need for a system capable of accurately identifying and reporting short-circuit tripping events. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a short-circuit tripping structure that can reliably distinguish between short-circuit tripping and manual tripping, and can report the short-circuit tripping signal to promptly remind users to perform line maintenance and eliminate safety hazards.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A short-circuit tripping structure is provided for use in an electromagnetic tripping mechanism. The electromagnetic tripping mechanism includes a trip coil, a stationary iron core, a moving iron core assembly, a push rod, a trip lever, a short-circuit induction coil, and a data acquisition and control circuit board. The short-circuit induction coil senses a short-circuit current and causes the moving iron core assembly to drive the push rod, which in turn pushes the trip lever to rotate and trigger tripping. A trigger portion is provided at the tail of the trip lever. A signal trigger switch corresponding to the trigger portion is provided on the data acquisition and control circuit board. When short-circuit tripping occurs, the trip lever rotates under the push rod's influence, and the trigger portion at its tail moves with the lever, triggering the signal trigger switch and generating a short-circuit tripping indication signal. The data acquisition and control circuit board is configured to receive and upload this short-circuit tripping indication signal.

[0007] As a further technical solution of this utility model: the signal trigger switch is a micro switch, a reed switch or an optocoupler sensor.

[0008] As a further technical solution of this utility model: the triggering part is a protrusion, boss or lever formed at the tail of the release lever.

[0009] As a further technical solution of this utility model: the acquisition and control circuit board is connected to a communication module for remotely reporting the short-circuit trip indication signal.

[0010] As a further technical solution of this utility model: the acquisition and control circuit board is connected to a local indicator device, which is used to provide a local alarm indication when a short-circuit trip indication signal is received.

[0011] This invention is integrated into an electromagnetic opening and closing mechanism. This electromagnetic opening and closing mechanism typically includes a trip coil, a stationary iron core, a moving iron core assembly, a push rod, a trip lever, a short-circuit induction coil, and a data acquisition and control circuit board. Its innovation lies in: adding a trigger section to the tail of the trip lever; and setting a signal trigger switch on the data acquisition and control circuit board corresponding to the position of the trigger section.

[0012] When a short circuit occurs on the line, the short-circuit induction coil senses a large short-circuit current. The magnetic field generated by this current causes the moving iron core assembly to move, driving the push rod to pop out. The push rod pushes the trip lever to rotate, and the trip lever in turn drives the mechanism to perform the opening operation. Simultaneously with this physical opening process, due to the rotation of the trip lever, the trigger part (such as a protrusion) at its tail also moves, triggering (such as pressing or approaching) the signal trigger switch (such as a microswitch) mounted on the acquisition and control circuit board along its movement path.

[0013] When the signal-triggered switch is activated, it generates a switching signal (i.e., a short-circuit trip indication signal) and sends it to the data acquisition and control circuit board. The circuit board is pre-configured to recognize and record this specific signal. Subsequently, the circuit board can remotely report the "short-circuit trip" event information to the monitoring center or user terminal via its integrated or external communication modules (such as NB-IoT, 4G, Wi-Fi, etc.); and / or drive local indicator devices (such as specially colored indicator lights, LCD displays, buzzers, etc.) to issue alarm indications, clearly informing the user that the trip was caused by a short circuit and that the line urgently needs maintenance.

[0014] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0015] 1. Accurate and reliable identification: Utilizing the characteristic that short-circuit tripping inevitably causes the trip lever to move physically, the signal switch is directly triggered through the mechanical structure. The identification method is direct and accurate, and is not affected by the difficulty in capturing transient current signals, effectively distinguishing between short-circuit tripping and manual tripping.

[0016] 2. Timely alarm reminder: It can immediately report short circuit tripping events remotely or locally, so that maintenance personnel or users can be informed of the fault information as soon as possible, arrange line maintenance in a timely manner, and avoid the accident from being unaware and reconnecting power, which could lead to the escalation of the accident.

[0017] 3. Simple and easy to implement: Only a few structures (trigger part and signal trigger switch) need to be added to the existing trip lever and circuit board. The modification is simple, the cost is low, and it is easy to implement and promote in production.

[0018] 4. Enhance product intelligence: Add status monitoring and fault reporting functions to the traditional tripping mechanism, which is in line with the development trend of smart grid and Internet of Things. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Reference numerals: 1. Base; 2. Handle; 3. Handle spring; 4. Moving contact; 5. Lock; 6. Tripping lever; 7. Tripping spring; 8. Tripping coil; 9. Stationary iron core; 10. Moving iron core one; 11. Moving iron core two; 12. Push rod; 13. Reset spring; 14. Instantaneous spring; 15. Short-circuit induction coil; 16. Magnetic yoke; 17. Acquisition and control circuit board; 18. Large U-shaped component; 19. Moving contact spring; 20. Locking spring; 21. Stationary contact plate; 22. Triggering part; 23. Signal trigger switch. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example 1:

[0025] Reference Figure 1 This utility model discloses a short-circuit tripping structure applied to an electromagnetic tripping mechanism. The electromagnetic tripping mechanism includes a trip coil 8, a stationary iron core 9, a moving iron core assembly, a push rod 12, a trip lever 6, a short-circuit induction coil 15, and a data acquisition and control circuit board 17. The short-circuit induction coil 15 senses the short-circuit current and causes the moving iron core assembly to drive the push rod 12 to move. The push rod 12 pushes the trip lever 6 to rotate, triggering tripping. A trigger part 22 is provided at the tail of the trip lever 6. A signal trigger switch 23 corresponding to the trigger part 22 is provided on the data acquisition and control circuit board 17. When short-circuit tripping occurs, the trip lever 6 is pushed by the push rod 12 to rotate. The trigger part 22 at its tail moves with the lever and triggers the signal trigger switch 23, generating a short-circuit tripping indication signal. The data acquisition and control circuit board 17 is configured to receive and upload the short-circuit tripping indication signal.

[0026] The signal trigger switch 23 is a microswitch, reed switch, or optocoupler sensor; in this embodiment, a microswitch is preferred. The trigger part 22 is a protrusion, boss, or lever formed at the tail of the trip lever 6. The acquisition and control circuit board 17 is connected to a communication module for remotely reporting the short-circuit trip indication signal. The acquisition and control circuit board 17 is also connected to a local indicating device for providing a local alarm indication upon receiving the short-circuit trip indication signal.

[0027] The tail of the trip lever 6 is machined to form a protrusion as a trigger part 22. A micro switch is installed on the acquisition and control circuit board 17 as a signal trigger switch 23. Its installation position ensures that when the trip lever 6 is in the standby position before the circuit breaker is opened, the contact of the micro switch is not pressed. When a short circuit occurs and the trip lever 6 is pushed by the push rod 12 to rotate into place, the protrusion at its tail just presses against the contact of the micro switch.

[0028] Working process: During normal tripping (manual), the trip lever 6 may not move or may move in a different way, and the protrusion at its tail will not trigger the micro switch.

[0029] When a short circuit occurs, the short-circuit induction coil 15 generates a magnetic field, driving the moving iron core assembly to eject the push rod 12 to the right. The push rod 12 pushes the trip lever 6 to rotate counterclockwise around its fulcrum. The rotation of the trip lever 6 performs a mechanical tripping action on the one hand, and drives the protrusion at its tail to move on the other. During the movement, the protrusion presses the contact of the microswitch, causing the state of the microswitch to change (e.g., from normally open to closed), thereby sending an electrical signal to the acquisition and control circuit board 17.

[0030] After detecting the signal, the acquisition and control circuit board 17 identifies it as a "short circuit trip" event. The acquisition and control circuit board 17 can be connected to a communication module via its interface. Figure 1 (Not fully shown in the image), it sends event information to a remote server or user's mobile app via a wireless network. Simultaneously, it can also drive the onboard LED indicator to flash red for local alarm purposes.

[0031] In this way, users can clearly and accurately know that the tripping was caused by a short circuit in the line, and thus take timely maintenance measures.

[0032] The specific embodiments described in this utility model do not constitute a limitation on the scope of protection of this application. The signal trigger switch 23 may also be a non-contact switch such as a reed switch (in conjunction with the magnet on the trip lever 6) or an optocoupler sensor. Other alternatives or modifications based on the essence of this utility model are all within the scope of protection of this utility model.

[0033] In this embodiment, refer to Figure 1 The electromagnetic opening and closing mechanism also includes a base 1, a cover, a handle 2, a handle spring 3, an opening and closing operation mechanism, a trip spring 7, a reset spring 13, an instantaneous spring 14, and a magnetic yoke 16.

[0034] The opening and closing operating mechanism includes a moving contact 4 and a latch 5; the trip coil 8, stationary iron core 9, moving iron core assembly, push rod 12, return spring 13 and magnetic yoke 16 constitute the electromagnetic drive part; the acquisition control circuit board 17 is electrically connected to the trip coil 8 and the short-circuit induction coil 15; the trip spring 7 is installed on the upper end of the trip lever 6, and the trip lever 6 is biased by the trip spring 7; the handle 2 presses the trip spring 7 in the open state so that it is located below the push rod 12, and when closing, the trip spring 7 springs up and is located at the front end of the push rod 12; the moving iron core assembly drives the push rod 12 to move, and the push rod 12 can act on the trip spring 7 or the handle 2; the short-circuit induction coil 15 is arranged horizontally with the trip coil 8 and shares the push rod 12, stationary iron core 9 and magnetic yoke 16.

[0035] The moving iron core assembly includes moving iron core one 10 and moving iron core two 11. A momentary spring 14 is located behind the trip coil 8, and its elastic force is configured according to the current specifications. The opening and closing operating mechanism also includes a moving contact spring 19 and a locking spring 20; the locking spring 5 is rotatably installed in the gap of the moving contact 4 and is locked to prevent vertical movement. The opening and closing operating mechanism consists of a handle 2, a large U-shaped component 18, a moving contact 4, a moving contact spring 19, a locking spring 5, a locking spring 20, and a stationary contact plate 21.

[0036] The acquisition control circuit board 17 is used to receive control signals and short-circuit signals, and output voltage to the trip coil 8. After the trip coil 8 is energized, it generates a magnetic field, which drives the moving iron core assembly to overcome the elastic force of the reset spring 13 and attract the stationary iron core 9, thereby pushing the push rod 12 to pop outward.

[0037] In the open position, the handle 2 presses the trip spring 7, placing it below the push rod 12. During the closing process, the handle 2 rotates, the trip spring 7 pops up and moves to the front end of the push rod 12. When closing, the push rod 12 pops out and pushes the handle 2 to move, completing the closing action. When opening, the circuit board sends an opening signal, the push rod 12 pops out and pushes the trip spring 7, which is already at the front end, thereby driving the trip lever 6 to rotate. The tail of the trip lever 6 pushes the opening and closing operation mechanism to unlock, realizing the trip opening.

[0038] The base 1 and the cover constitute the outer shell. The handle 2 is mounted via a rotating shaft, and the handle spring 3 provides the restoring force. The opening and closing operating mechanism includes a moving contact 4, a latch 5, a moving contact spring 19, and a latch spring 20. The moving contact 4 cooperates with the stationary contact plate 21 to realize the opening and closing of the circuit. The latch 5 is installed in a specific empty position of the moving contact 4. After being rotated into place, its vertical position is constrained to prevent shaking.

[0039] The trip lever 6 is rotatably mounted, and the trip spring 7 is mounted on the upper end of the trip lever 6. The trip spring 7 causes the trip lever 6 to tend to bias towards the magnetic yoke 16.

[0040] The electromagnetic drive section includes a trip coil 8, a stationary iron core 9, a moving iron core assembly (composed of moving iron core one 10 and moving iron core two 11), a push rod 12, a return spring 13, and a magnetic yoke 16. The return spring 13 acts on the moving iron core assembly, causing it to tend to separate from the stationary iron core 9. An instantaneous spring 14, selected according to the product's current specifications, is located behind the trip coil 8. A short-circuit induction coil 15 is arranged horizontally adjacent to the trip coil 8 and shares the push rod 12, the stationary iron core 9, and the magnetic yoke 16. A data acquisition and control circuit board 17 is installed in a suitable position inside the mechanism and connected to the trip coil 8 and the short-circuit induction coil 15.

[0041] Closing process: Upon receiving the closing signal (or manual operation handle 2), the acquisition and control circuit board 17 supplies power to the trip coil 8, generating a magnetic field. The moving iron core 10 and moving iron core 2 11 attract the stationary iron core 9, overcoming the force of the return spring 13 and pushing the push rod 12 outward. At this time, if it is a manual closing operation, the handle 2 has already rotated, causing the trip spring 7 to spring up and be located at the front end of the push rod 12. The push rod 12 directly presses against the corresponding part on the handle 2 (or through the intermediate component) to push it to continue rotating, driving the operating mechanism to complete the closing operation. If it is an electric closing operation, the push rod 12 may directly act on the corresponding part of the operating mechanism.

[0042] The tripping process (electric or protective tripping): When the acquisition and control circuit board 17 receives the tripping signal or the short-circuit induction coil 15 detects a short-circuit signal, it supplies power to the trip coil 8, and the push rod 12 pops out. At this time, the trip spring 7 is already at the front end of the push rod 12. The push rod 12 pushes the trip spring 7, causing the trip lever 6 to rotate against the force of the trip spring 7. The tail of the trip lever 6 pushes the latch 5 or other unlocking parts of the tripping and closing operating mechanism, causing the operating mechanism to release and the circuit to open quickly under the action of the contact spring, etc.

[0043] The implementation principle of this utility model is as follows: This utility model discloses a short-circuit tripping structure, including a trip lever 6 and a data acquisition and control circuit board 17. The trip lever 6 has a trigger part 22 at its tail, and the data acquisition and control circuit board 17 has a corresponding signal trigger switch 23. When a short-circuit tripping occurs, the trip lever 6 is pushed and rotated by the push rod 12, and its trigger part 22 moves accordingly, triggering the signal trigger switch 23 to generate a short-circuit tripping indication signal; the data acquisition and control circuit board 17 receives and uploads this signal. This utility model utilizes the mechanical action of short-circuit tripping to directly trigger the signal, ensuring accurate and reliable identification. It can effectively distinguish between short-circuit tripping and manual tripping, and promptly report and remind the line to be inspected. The structure is simple, the cost is low, and it improves the product's intelligence level and safety.

[0044] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A short-circuit tripping structure applied to an electromagnetic tripping mechanism, the electromagnetic tripping mechanism comprising a tripping coil (8), a stationary iron core (9), a moving iron core assembly, a push rod (12), a tripping lever (6), a short-circuit induction coil (15), and a data acquisition and control circuit board (17); the short-circuit induction coil (15) senses a short-circuit current and causes the moving iron core assembly to drive the push rod (12) to move, the push rod (12) pushing the tripping lever (6) to rotate to trigger tripping; characterized in that, The trip lever (6) is provided with a trigger part (22) at its tail end; the acquisition control circuit board (17) is provided with a signal trigger switch (23) corresponding to the trigger part (22); when a short circuit occurs, the trip lever (6) is pushed by the top rod (12) and rotates, and the trigger part (22) at its tail end moves with the lever and triggers the signal trigger switch (23) to generate a short circuit trip indication signal; the acquisition control circuit board (17) is configured to receive and upload the short circuit trip indication signal.

2. The short-circuit tripping structure according to claim 1, characterized in that, The signal trigger switch (23) is a micro switch, a reed switch or an optocoupler sensor.

3. The short-circuit tripping structure according to claim 1, characterized in that, The trigger part (22) is a protrusion, boss or lever formed at the tail of the release lever (6).

4. The short-circuit tripping structure according to claim 1, characterized in that, The acquisition and control circuit board (17) is connected to a communication module for remotely reporting the short-circuit trip indication signal.

5. The short-circuit tripping structure according to claim 1, characterized in that, The acquisition and control circuit board (17) is connected to a local indicator device, which is used to provide a local alarm indication when a short-circuit trip indication signal is received.

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