Split pole breaker with misoperation prevention mechanism

Abstract

The utility model discloses a split excitation release with prevent false action protection mechanism relates to electrical equipment technical field, it includes split excitation release body, is fixedly arranged with fixed shell on split excitation release body, and is provided with protection switch in fixed shell still includes: setting on the protection mechanism of split excitation release body, and protection mechanism is used for preventing false closing protection switch, protection mechanism contains with the fixed connection of split excitation release body connecting plate, and is fixedly arranged with stand on connecting plate, is fixedly arranged with support plate on stand, and is fixedly arranged with electric telescopic handle on support plate, the output of electric telescopic handle is fixedly arranged with lifting plate, and is integrally arranged with the extension plate for the clamping protection switch of lifting plate, is fixedly arranged with clamping part on connecting plate, and clamping part is used for clamping protection switch with extension plate cooperation. This split excitation release with prevent false action protection mechanism is convenient for safe use, and high stability.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a shunt trip unit with a malfunction protection mechanism. Background Technology

[0002] In today's increasingly complex electrical systems with ever-more stringent requirements for safety and stability, circuit breakers, as core equipment ensuring the safe operation of circuits, directly impact the reliability of the entire power system. Shunt trip units, as crucial accessories to circuit breakers, play an indispensable role in circuit control and protection. Essentially, a shunt trip unit is a remote control device that receives external electrical signals. When these signals reach a preset threshold, the shunt trip unit quickly activates, driving the circuit breaker to trip and thus disconnect the circuit.

[0003] On industrial automated production lines, various large-scale mechanical equipment and automated devices operate intensively, placing extremely high demands on the stable power supply and safe control of the circuits. If any part of the circuit malfunctions, such as overload or short circuit, and the power supply cannot be cut off in time, it will not only damage the equipment but may also trigger a chain reaction, paralyzing the entire production line and even causing safety accidents, threatening the lives of operators. Shunt trip units can work closely with the automated control system. When a circuit fault signal is detected, they quickly trip the circuit breaker, isolating the faulty area in time, ensuring that other normal equipment is not affected, and guaranteeing the stable operation of the production line.

[0004] In complex electrical environments, when a shunt trip unit is subjected to electromagnetic interference, the received control signal may be distorted or misinterpreted. The originally normal control signal may be superimposed by the interference signal, causing the signal amplitude or frequency to exceed the normal range, thereby triggering the shunt trip unit and causing the circuit breaker to trip erroneously. For example, on a continuous production line, a single erroneous trip can cause the entire production process to be interrupted. Products being processed may be scrapped due to a sudden power outage, and production equipment may also be damaged due to a sudden shutdown. This not only causes huge economic losses but also affects production progress and delivery time, resulting in low safety.

[0005] Therefore, in order to address the above problems, the applicant needs to design a shunt trip unit with a mechanism to prevent malfunctions. Utility Model Content

[0006] The purpose of this invention is to provide a shunt trip unit with a malfunction protection mechanism to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a shunt trip unit with an anti-maloperation protection mechanism, comprising a shunt trip unit body, a fixing shell fixedly mounted on the shunt trip unit body, and a protective switch disposed within the fixing shell.

[0008] It also includes: a protection mechanism disposed on the shunt trip unit body, and the protection mechanism is used to prevent accidental closure of the protection switch. The protection mechanism includes a connecting plate fixedly connected to the shunt trip unit body, and a column fixedly disposed on the connecting plate. A support plate is fixedly disposed on the column, and an electric telescopic rod is fixedly disposed on the support plate. A lifting plate is fixedly disposed at the output end of the electric telescopic rod, and an extension plate for engaging the protection switch is integrally disposed on the lifting plate. A clamping component is fixedly disposed on the connecting plate, and the clamping component cooperates with the extension plate to clamp the protection switch.

[0009] Furthermore, the connecting plate is provided with a controller electrically connected to the shunt trip unit body, and the controller is used to control the retraction of the electric telescopic rod when the shunt trip unit body is de-energized.

[0010] Through the above structural design, when the circuit needs to be actively disconnected due to fault or maintenance, the controller can automatically trigger the electric telescopic rod to retract, releasing the jamming restriction on the protection switch and ensuring that the protection switch can be operated normally.

[0011] Furthermore, a guide strip is fixedly provided on the connecting plate, and the guide strip is slidably connected to the lifting plate.

[0012] Through the above structural design, the guide bar provides precise linear guidance for the vertical movement of the lifting plate, effectively preventing the lifting plate from deviating or swaying during the extension and retraction process.

[0013] Furthermore, the clamping component includes a return spring fixedly connected to the connecting plate, and the end of the return spring away from the connecting plate is fixedly provided with a clamping plate.

[0014] Through the above structural design, the elastic characteristics of the reset spring enable the clamping plate to adapt to protection switches of different sizes or installation deviations, providing a uniform and flexible clamping force and avoiding switch deformation or poor contact caused by rigid clamping.

[0015] Furthermore, a sliding rod is fixedly provided on the clamping plate, and a hollow sleeve is slidably connected to the outer side of the sliding rod, and the hollow sleeve is fixedly connected to the connecting plate.

[0016] Through the above structural design, the sliding pair formed by the slide rod and the hollow sleeve further constrains the movement trajectory of the clamping plate, preventing tilting or jamming caused by uneven force during clamping.

[0017] Furthermore, a sponge pad is fixedly provided on the shunt trip unit body, and the sponge pad is used to buffer the closing of the protective switch.

[0018] Through the above structural design, the sponge pad absorbs the impact energy when the protective switch is closed, significantly reducing mechanical collision noise, while also reducing the bouncing phenomenon of the switch contacts and avoiding false signals caused by momentary poor contact.

[0019] Furthermore, a slot is fixedly provided on the shunt trip unit body, and the slot is used to connect the shunt trip unit body to the insert-type plate rear connection device.

[0020] Through the above structural design, the slot design enables quick modular docking between the shunt trip unit and external devices, simplifying the installation process and reducing the risk of wiring errors.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the shunt trip unit with anti-maloperation protection mechanism is easy to use safely and has high stability, as detailed below:

[0022] This invention achieves multiple anti-misoperation protection functions through the coordinated design of the protection mechanism and the shunt trip unit body. The linkage and locking mechanism of the electric telescopic rod and the extension plate, combined with the flexible clamping of the clamping component, forms a double lock on the protection switch, effectively resisting the risk of false triggering caused by electromagnetic interference or mechanical vibration. In use, when the protection switch is in the upward open state, the electric telescopic rod pushes the lifting plate to move, and the movement of the lifting plate will drive the extension plate to move, which will lock the protection switch. At the same time, the return spring will push the clamping plate to clamp the protection switch, preventing the protection switch from being accidentally closed, thus ensuring high safety. When the circuit is actively disconnected due to fault or maintenance needs, the controller can automatically trigger the electric telescopic rod to retract, releasing the locking restriction on the protection switch and ensuring that the protection switch can be operated normally. This avoids the operational difficulties caused by the protection mechanism being accidentally locked in the power-off state, and at the same time enhances the system's adaptability to abnormal power-off scenarios, improving maintenance efficiency and safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the protective mechanism of this utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the protective mechanism of this utility model. Figure 2 ;

[0026] Figure 4 This is a three-dimensional structural diagram of the clamping component of this utility model.

[0027] In the diagram: 1. Shunt trip unit body; 2. Protection mechanism; 10. Slot; 11. Fixing shell; 12. Protection switch; 13. Sponge pad; 20. Connecting plate; 21. Column; 22. Support plate; 23. Electric telescopic rod; 24. Lifting plate; 25. Extension plate; 26. Guide bar; 27. Clamping component; 28. Controller; 270. Hollow sleeve; 271. Slide rod; 272. Clamping plate; 273. Return spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-4 As shown, the shunt trip unit with anti-misoperation protection mechanism of this utility model includes a shunt trip unit body 1, a fixed housing 11 fixedly mounted on the shunt trip unit body 1, and a protection switch 12 disposed inside the fixed housing 11. It also includes a protection mechanism 2 disposed on the shunt trip unit body 1, which is used to prevent accidental closing of the protection switch 12. The protection mechanism 2 includes a connecting plate 20 fixedly connected to the shunt trip unit body 1, a column 21 fixedly mounted on the connecting plate 20, a support plate 22 fixedly mounted on the column 21, an electric telescopic rod 23 fixedly mounted on the support plate 22, a lifting plate 24 fixedly mounted at the output end of the electric telescopic rod 23, and an extension plate 25 integrally mounted on the lifting plate 24 for engaging the protection switch 12. A clamping component 27 is fixedly mounted on the connecting plate 20, and the clamping component 27 cooperates with the extension plate 25 to clamp the protection switch 12.

[0030] The connecting plate 20 is equipped with a controller 28 that is electrically connected to the shunt trip unit 1. The controller 28 is used to control the retraction of the electric telescopic rod 23 when the shunt trip unit 1 is de-energized. When the circuit is actively de-energized due to fault or maintenance, the controller 28 can automatically trigger the retraction of the electric telescopic rod 23, release the locking restriction on the protection switch 12, and ensure that the protection switch 12 can be operated normally. This avoids the operational difficulties caused by the protection mechanism 2 being accidentally locked in the power-off state, and at the same time enhances the system's adaptability to abnormal power-off scenarios, improving maintenance efficiency and safety.

[0031] A guide bar 26 is fixedly installed on the connecting plate 20, and the guide bar 26 is slidably connected to the lifting plate 24. The guide bar 26 provides precise linear guidance for the vertical movement of the lifting plate 24, effectively preventing the lifting plate 24 from shifting or shaking during the extension and retraction process, and ensuring that the engagement position of the extension plate 25 and the protection switch 12 is always aligned.

[0032] The clamping component 27 includes a return spring 273 fixedly connected to the connecting plate 20, and a clamping plate 272 is fixedly provided at the end of the return spring 273 away from the connecting plate 20. The elastic characteristics of the return spring 273 enable the clamping plate 272 to adapt to the protection switch 12 of different sizes or installation deviations, providing a uniform and flexible clamping force, avoiding switch deformation or poor contact caused by rigid clamping. At the same time, the reset capability of the return spring 273 ensures that the clamping plate 272 quickly returns to its original position after the external force is released, reducing the need for manual intervention and improving the self-recovery performance of the system.

[0033] A sliding rod 271 is fixedly installed on the clamping plate 272. A hollow sleeve 270 is slidably connected to the outside of the sliding rod 271, and the hollow sleeve 270 is fixedly connected to the connecting plate 20. The sliding pair formed by the sliding rod 271 and the hollow sleeve 270 further constrains the movement trajectory of the clamping plate 272, preventing tilting or jamming caused by uneven force during clamping. The hollow sleeve 270, as a rigid support structure, disperses the local stress of the clamping force on the connecting plate 20, improving the durability and vibration resistance of the clamping component 27, and is especially suitable for environments with high electromagnetic interference or mechanical vibration.

[0034] A sponge pad 13 is fixedly installed on the shunt trip unit body 1. The sponge pad 13 is used to buffer the closed protective switch 12. The sponge pad 13 absorbs the impact energy when the protective switch 12 is closed, which significantly reduces mechanical collision noise and reduces the bounce phenomenon of switch contacts, thus avoiding false signals caused by momentary poor contact.

[0035] A slot 10 is fixedly provided on the shunt trip unit body 1, and the slot 10 is used to connect the shunt trip unit body 1 to the plug-in board rear connection device. The slot 10 design realizes quick modular docking between the shunt trip unit body 1 and the external device, simplifies the installation process, and reduces the risk of wiring errors.

[0036] Working principle: When using the shunt trip unit with anti-misoperation protection mechanism, when the protection switch 12 is in the upward open state, the electric telescopic rod 23 pushes the lifting plate 24 to move. The movement of the lifting plate 24 will drive the extension plate 25 to move, and the extension plate 25 will lock the protection switch 12. At the same time, the reset spring 273 will push the clamping plate 272 to clamp the protection switch 12, preventing the protection switch 12 from being accidentally closed, thus ensuring high safety. When the circuit needs to be actively disconnected due to fault or maintenance, the controller 28 can automatically trigger the electric telescopic rod 23 to retract, releasing the locking restriction on the protection switch 12 and ensuring that the protection switch 12 can be operated normally. This avoids the operational difficulties caused by the protection mechanism 2 being accidentally locked in the power-off state, while enhancing the system's adaptability to abnormal power-off scenarios and improving maintenance efficiency and safety.

[0037] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A shunt trip unit with a malfunction protection mechanism, comprising a shunt trip unit body (1), wherein a fixed housing (11) is fixedly provided on the shunt trip unit body (1), and a protective switch (12) is provided inside the fixed housing (11). characterized in that Also includes: The protection mechanism (2) is provided on the shunt trip unit body (1) and is used to prevent the protection switch (12) from being accidentally closed. The protection mechanism (2) includes a connecting plate (20) fixedly connected to the shunt trip unit body (1), and a column (21) is fixedly provided on the connecting plate (20). A support plate (22) is fixedly provided on the column (21), and an electric telescopic rod (23) is fixedly provided on the support plate (22). A lifting plate (24) is fixedly provided at the output end of the electric telescopic rod (23), and an extension plate (25) for engaging the protection switch (12) is integrally provided on the lifting plate (24). A clamping component (27) is fixedly provided on the connecting plate (20), and the clamping component (27) cooperates with the extension plate (25) to clamp the protection switch (12).

2. The split-phase relay with misoperation prevention mechanism according to claim 1, characterized in that: The connecting plate (20) is provided with a controller (28) electrically connected to the shunt trip unit body (1), and the controller (28) is used to control the retraction of the electric telescopic rod (23) when the shunt trip unit body (1) is de-energized.

3. The misoperation prevention mechanism-equipped split pole breaker according to claim 1, characterized by: A guide bar (26) is fixedly provided on the connecting plate (20), and the guide bar (26) is slidably connected to the lifting plate (24).

4. The misoperation prevention mechanism-equipped split pole breaker according to claim 1, characterized by: The clamping component (27) includes a return spring (273) fixedly connected to the connecting plate (20), and a clamping plate (272) is fixedly provided at the end of the return spring (273) away from the connecting plate (20).

5. The misoperation prevention mechanism-equipped split pole breaker according to claim 4, characterized in that: A slide rod (271) is fixedly provided on the clamping plate (272). A hollow sleeve (270) is slidably connected to the outside of the slide rod (271), and the hollow sleeve (270) is fixedly connected to the connecting plate (20).

6. The misoperation prevention mechanism-equipped split pole breaker according to claim 1, characterized in that: A sponge pad (13) is fixedly installed on the shunt trip unit body (1), and the sponge pad (13) is used to buffer the closed protective switch (12).

7. The misoperation prevention mechanism-equipped split pole breaker according to claim 1, characterized by: The shunt trip unit body (1) is fixedly provided with a slot (10), and the slot (10) is used to connect the shunt trip unit body (1) and the insert-type plate rear connection device.

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