A circuit breaker for switchgear with intelligent protection function

Abstract

This utility model relates to the technical field of circuit breakers for switchgear, specifically to a circuit breaker for switchgear with intelligent protection function. It includes a switchgear body with a door on one side. A main circuit switch is located inside the switchgear body, and multiple branch circuit switches are located at the bottom of the main circuit switch. Branch circuit switches are located inside the switchgear body. Connecting wires are connected to the main circuit switch, with the other end of each wire connected to a branch circuit switch. A protection component is located at one end of the main circuit switch. The protection component protects the main circuit switch under overload conditions. Compared to existing technologies, this application activates the protection component when the current exceeds a set threshold. By utilizing the principle of current shunting in a parallel circuit (i.e., current flowing through branches), it first shares or limits part of the current and, when necessary, triggers the main circuit switch to prevent damage due to sudden overload, thereby achieving intelligent protection for the main circuit switch.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breakers for switchgear, and in particular to a circuit breaker for switchgear with intelligent protection function. Background Technology

[0002] Circuit breakers in switchgear play a crucial role in power systems, providing overload and short-circuit protection. When the current exceeds the rated value, the circuit breaker should trip promptly to disconnect the power supply and prevent the line fault from escalating or equipment damage. However, traditional circuit breakers mostly rely on thermal-magnetic trip units or electronic detection modules. When the system current fluctuates drastically or is under prolonged mild overload, they often cannot determine in a timely and accurate manner whether to trip, easily leading to malfunctions or untimely protection.

[0003] In existing technologies, thermal-magnetic tripping structures are prone to false tripping or delayed tripping when faced with complex load fluctuations or instantaneous high surge currents, causing abnormal equipment shutdowns or protection failures. This is especially problematic in systems with multiple parallel branch circuits, where the main circuit breaker often bears greater current surges. Prolonged operation can lead to wear, fatigue, or burning of internal mechanical components, thus affecting overall reliability. Furthermore, some current circuit breakers incorporate electronic intelligent detection technology, using current sensors and microcontrollers to determine the circuit breaking logic. While this improves sensitivity, the circuit structure is complex, anti-interference capabilities are weak, and maintenance costs are high. In switchgear environments with complex electromagnetic conditions or large temperature and humidity variations, false tripping or failures are likely. Additionally, the electronic system relies on an external power supply; a power outage will completely disable its protection function, posing a safety hazard. Therefore, this invention proposes a switchgear circuit breaker with intelligent protection functions to meet the requirements of ensuring timely and reliable tripping while effectively mitigating the impact on the main switch. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a circuit breaker for switchgear with intelligent protection function, so as to solve the problem that the main circuit switch often needs to bear a larger current impact, which is prone to wear, fatigue or burning of internal mechanical parts under long-term operation, thus affecting the reliability of the whole machine.

[0005] To achieve the above objectives, this utility model provides a circuit breaker for switchgear with intelligent protection function, including a switchgear body, a cabinet door on one side of the switchgear body, a main circuit switch inside the switchgear body, multiple branch circuit switches at the bottom of the main circuit switch, branch circuit switches inside the switchgear body, a connecting wire connected to the main circuit switch, the other end of the connecting wire connected to the branch circuit switch, and a protection component at one end of the main circuit switch; the protection component is used to protect the main circuit switch under overload conditions.

[0006] Preferably, the protection component includes a mounting bracket disposed within the switch cabinet body, a mounting shell disposed on the mounting bracket, a connecting rod disposed on the mounting shell, a deflection rod rotatably disposed on the connecting rod, a moving rod rotatably disposed at one end of the deflection rod, a pushing head disposed at one end of the moving rod, a connecting frame disposed on the inner wall of the mounting shell, the pushing head slidably disposed within the connecting frame, a guide rod disposed at one end of the pushing head, a moving head disposed at one end of the guide rod, and a trigger plate disposed on the moving head.

[0007] Preferably, a first conduit is provided on the switch cabinet body, a connecting protrusion is provided at one end of the first conduit, a second conduit is provided at the bottom of the first conduit, the second conduit can move up and down in the switch cabinet body, a connecting groove is provided at the center of the second conduit, and the connecting protrusion is adapted to the connecting groove.

[0008] Preferably, an electromagnet is provided on one side of the connecting line, and the magnitude of the magnetic force can be changed according to the amount of current passing through the main circuit switch.

[0009] Preferably, the deflection rod is L-shaped, and one end of the deflection rod is an electromagnet.

[0010] Preferably, a return spring is sleeved on the guide rod, with one end of the return spring located on one side of the push head and the other end of the return spring located on one side of the moving head.

[0011] Preferably, the trigger plate has a circular groove, and the trigger plate can contact the surface of the second conduit.

[0012] The beneficial effects of this utility model are: 1. By installing a main circuit breaker and multiple branch circuit breakers within the switchgear body, independent control of the main circuit and multiple branch circuits is achieved. The bottom of the main circuit breaker is connected to each branch circuit breaker via connecting lines to realize power distribution control. A protection component is installed at one end of the main circuit breaker. When the current at the front end exceeds a set threshold, the protection component is activated. By utilizing the principle of current shunting in a parallel circuit, i.e., current flowing through branches, part of the current is first shared or limited, and when necessary, the main circuit breaker is triggered to prevent damage due to sudden overload, thereby achieving intelligent protection of the main circuit breaker. By setting up protection components to overload protect the main circuit breaker, damage to the main circuit breaker caused by current surges is avoided, improving the service life and reliability of the circuit breaker. At the same time, the main circuit breaker and branch circuit breakers form a clear distribution network through connecting lines, enhancing the system's power management capabilities, improving maintenance efficiency and operational safety, and possessing good practicality and safety performance.

[0013] 2. When the current in the main circuit switch exceeds the preset threshold, the electromagnet on one side of the connecting line generates enhanced magnetic force, attracting the deflection rod connected to it to deflect. Since the deflection rod has an L-shaped structure, its deflection drives the moving rod mounted on it to move, causing the push head at one end of the moving rod to slide forward within the connecting frame. The push head drives the guide rod and the moving head mounted on it to push forward. The trigger plate on the moving head moves towards the second conduit. When the circular groove on the trigger plate contacts the surface of the second conduit, it drives the second conduit to move closer to the first conduit, thereby realizing the parallel connection between the main circuit switch and the first and second conduits. Through the principle of current diversion in the parallel circuit, that is, the current flows through the branch, part of the current is first diverted or limited, thereby avoiding damage to the main circuit switch caused by excessive current or sudden changes. After the current stabilizes, the reset spring generates elastic force between the push head and the moving head, resetting the push head, guide rod, moving head and other structures to the initial state, facilitating the subsequent execution of protection actions.

[0014] 3. When the main circuit breaker is overloaded, the current change is promptly identified, and the parallel circuit of the circuit breaker is changed through electromagnetic drive and mechanical linkage structure. By setting linkage structures such as deflection rod, moving rod, and push head, the mechanical reliability of overload protection is improved; at the same time, the reset spring on the guide rod ensures rapid reset after action, avoiding false action and jamming; the trigger plate and the second line tube form an effective contact signal point, improving the accuracy of action and system response capability, and improving the overall intelligent protection function and safe operation level of the circuit breaker. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the first conduit and the second conduit of this utility model in operation; Figure 3 This is a schematic diagram of the protective component of this utility model; Figure 4 This is a partial cross-sectional view of the mounting shell of this utility model.

[0017] The following are labeled in the diagram: 1. Switch cabinet body; 2. Cabinet door; 3. Main circuit switch; 4. Connecting wire; 5. Branch circuit switch; 6. First conduit; 7. Second conduit; 8. Connecting protrusion; 9. Connecting groove; 10. Mounting bracket; 11. Mounting shell; 12. Connecting rod; 13. Deflection rod; 14. Moving rod; 15. Connecting frame; 16. Push head; 17. Guide rod; 18. Moving head; 19. Return spring; 20. Trigger plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1-4 As shown, a circuit breaker for a switchgear with intelligent protection function includes a switchgear body 1, a cabinet door 2 on one side of the switchgear body 1, a main circuit switch 3 inside the switchgear body 1, multiple branch circuit switches 5 at the bottom of the main circuit switch 3, the branch circuit switches 5 inside the switchgear body 1, a connecting wire 4 connected to the main circuit switch 3, the other end of the connecting wire 4 connected to the branch circuit switch 5, and a protection component at one end of the main circuit switch 3; the protection component is used to protect the main circuit switch 3 under overload conditions. By installing a main circuit switch 3 and multiple branch circuit switches 5 within the switch cabinet body 1, independent control of the main circuit and multiple branch circuits is achieved. The bottom of the main circuit switch 3 is connected to each branch circuit switch 5 via connecting lines 4, realizing power distribution control. A protection component is installed at one end of the main circuit switch 3. When the current at the front end exceeds a set threshold, the protection component is activated. By utilizing the principle of current shunting in a parallel circuit, i.e., current flowing through branches, a portion of the current is first shared or limited, and the main circuit switch 3 is triggered when necessary to prevent damage due to sudden overload, thereby achieving intelligent protection for the main circuit switch 3. By setting up the protection component to provide overload protection for the main circuit switch 3, damage to the main circuit switch 3 caused by current surges is avoided, improving the service life and reliability of the circuit breaker. At the same time, the main circuit switch 3 and the branch circuit switches 5 form a clear distribution network through connecting lines 4, enhancing the system's power management capabilities, improving maintenance efficiency and operational safety, and possessing good practicality and safety performance.

[0021] like Figures 1-4 As shown, the protection component includes a mounting bracket 10 disposed within the switchgear body 1. A mounting shell 11 is mounted on the mounting bracket 10. A connecting rod 12 is mounted on the mounting shell 11. A deflecting rod 13 is rotatably mounted on the connecting rod 12. A moving rod 14 is rotatably mounted at one end of the deflecting rod 13. A pushing head 16 is mounted at one end of the moving rod 14. A connecting frame 15 is disposed on the inner wall of the mounting shell 11. The pushing head 16 is slidably disposed within the connecting frame 15. A guide rod 17 is mounted at one end of the pushing head 16. A moving head 18 is mounted at one end of the guide rod 17. A trigger plate 20 is mounted on the moving head 18. A first conduit 6 is disposed on the switchgear body 1. A connecting protrusion is mounted at one end of the first conduit 6. 8. A second conduit 7 is provided at the bottom of the first conduit 6. The second conduit 7 can move up and down inside the switch cabinet body 1. A connecting groove 9 is provided at the center of the second conduit 7, and the connecting protrusion 8 is adapted to the connecting groove 9. An electromagnet is provided on one side of the connecting wire 4, and the magnetic force can be changed according to the amount of current passing through the main circuit switch 3. The deflection rod 13 is L-shaped, and one end of the deflection rod 13 is an electromagnet. A return spring 19 is sleeved on the guide rod 17. One end of the return spring 19 is provided on one side of the push head 16, and the other end of the return spring 19 is provided on one side of the moving head 18. A circular groove is provided on the trigger plate 20, and the trigger plate 20 can contact the surface of the second conduit 7. When the current in the main circuit switch 3 exceeds the preset threshold, the electromagnet on one side of the connecting line 4 generates enhanced magnetic force, attracting the deflection rod 13 connected to it to deflect. Since the deflection rod 13 has an L-shaped structure, its deflection causes the moving rod 14, which is rotatably mounted on it, to move. This causes the push head 16 at one end of the moving rod 14 to slide forward within the connecting frame 15. The push head 16 drives the guide rod 17 and the moving head 18 on the guide rod 17 to move forward. The trigger plate 20 on the moving head 18 moves towards the second conduit 7. When the circular groove on the trigger plate 20 contacts the surface of the second conduit 7, it causes the second conduit 7 to move closer to the first conduit 6, thereby realizing the parallel connection between the main circuit switch 3 and the first conduit 6 and the second conduit 7. Through the principle of current splitting in the parallel circuit, that is, the current flowing through the branch, part of the current is first shared or limited, and then... To prevent damage to the main circuit breaker 3 due to excessive or sudden current changes, the reset spring 19 generates elastic force between the push head 16 and the moving head 18 after the current stabilizes, resetting the push head 16, guide rod 17, moving head 18, and other structures to their initial state, facilitating subsequent protection actions. It can promptly identify current changes when the main circuit breaker 3 is overloaded and complete the change of the circuit breaker's parallel circuit through electromagnetic drive and mechanical linkage structure. By setting up linkage structures such as deflection rod 13, moving rod 14, and push head 16, the mechanical reliability of overload protection is improved. Simultaneously, the reset spring 19 on the guide rod 17 ensures rapid reset after action, avoiding false actions and jamming. The trigger plate 20 and the second conduit 7 form an effective contact signal point, improving action accuracy and system response capability, and overall enhancing the circuit breaker's intelligent protection function and safe operation level.

[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0023] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circuit breaker for switchgear with intelligent protection function, comprising a switchgear body (1), characterized in that, A cabinet door (2) is provided on one side of the switch cabinet body (1). A main circuit switch (3) is provided inside the switch cabinet body (1). Multiple branch circuit switches (5) are provided at the bottom of the main circuit switch (3). The branch circuit switches (5) are provided inside the switch cabinet body (1). A connecting line (4) is connected to the main circuit switch (3). The other end of the connecting line (4) is connected to the branch circuit switch (5). A protection component is provided at one end of the main circuit switch (3). The protection component is used to protect the main circuit switch (3) under overload conditions; The protection component includes a mounting bracket (10) disposed inside the switch cabinet body (1), a mounting shell (11) disposed on the mounting bracket (10), a connecting rod (12) disposed on the mounting shell (11), a deflection rod (13) rotatably disposed on the connecting rod (12), a moving rod (14) rotatably disposed at one end of the deflection rod (13), a push head (16) disposed at one end of the moving rod (14), a connecting frame (15) disposed on the inner wall of the mounting shell (11), the push head (16) slidably disposed in the connecting frame (15), a guide rod (17) disposed at one end of the push head (16), a moving head (18) disposed at one end of the guide rod (17), and a trigger plate (20) disposed on the moving head (18).

2. A circuit breaker for switchgear with intelligent protection function according to claim 1, characterized in that, The switch cabinet body (1) is provided with a first conduit (6), one end of the first conduit (6) is provided with a connecting protrusion (8), the bottom of the first conduit (6) is provided with a second conduit (7), the second conduit (7) can move up and down in the switch cabinet body (1), a connecting groove (9) is provided at the center of the second conduit (7), and the connecting protrusion (8) is adapted to the connecting groove (9).

3. A circuit breaker for switchgear with intelligent protection function according to claim 1, characterized in that, An electromagnet is provided on one side of the connecting line (4), and the magnitude of the magnetic force can be changed according to the amount of current passing through the main circuit switch (3).

4. A circuit breaker for switchgear with intelligent protection function according to claim 2, characterized in that, The deflection rod (13) is L-shaped, and one end of the deflection rod (13) is an electromagnet.

5. A circuit breaker for switchgear with intelligent protection function according to claim 4, characterized in that, A reset spring (19) is sleeved on the guide rod (17). One end of the reset spring (19) is located on one side of the push head (16), and the other end of the reset spring (19) is located on one side of the moving head (18).

6. A circuit breaker for switchgear with intelligent protection function according to claim 5, characterized in that, The trigger plate (20) has a circular groove, and the trigger plate (20) can contact the surface of the second conduit (7).

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