A guard for a circuit breaker

Abstract

The utility model discloses a protective device for circuit breaker belongs to circuit breaker technical field. A protective device for circuit breaker, including circuit breaker main part, the outside wall of circuit breaker main part rear is seted up and has the clamping groove, the inside of circuit breaker main part is provided with electrical element main part, and the outside wall of circuit breaker main part rear is provided with protection assembly, and dry board can carry out effective adsorption to the humidity of entering, thereby greatly reduce the possibility of humidity to internal electrical element main part cause damage, secondly can be more convenient for personnel to clean the fin and be convenient for personnel's later dismounting maintenance, whole use is more convenient, and effectively promote its use practicality, and can install on the guide rail of various sizes, and the stability is higher after fixing.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and more specifically, to a protective device for circuit breakers. Background Technology

[0002] A circuit breaker is an electrical device that can connect and disconnect circuits under normal and fault conditions. Its main purpose is to protect electrical systems from damage caused by overload, short circuit, and undervoltage. In terms of its working principle, under overload, the internal heating element heats up due to the current, causing the bimetallic strip to bend and deform, triggering the tripping mechanism to trip. At the moment of short circuit, a strong magnetic field causes the electromagnetic trip unit to act quickly, driving the tripping mechanism to rapidly disconnect the circuit. Undervoltage, the undervoltage trip unit activates, causing the circuit breaker to trip. Its main structure includes a contact system (with moving and stationary contacts), an arc-extinguishing chamber (used to extinguish the arc generated during opening and closing), a tripping mechanism (to achieve the tripping action), and an operating mechanism (for manual or electric operation of the circuit breaker). The circuit breaker's protective devices are those that primarily provide protection during the circuit breaker's operation.

[0003] Existing circuit breakers generally rely solely on a single casing for protection. This method has significant shortcomings in practical applications. In high-humidity environments, the casing is insufficient to effectively prevent moisture intrusion, leading to frequent internal dampness. Electrical components, constantly exposed to moisture, are highly susceptible to short circuits, corrosion, and other malfunctions, severely impacting the circuit breaker's normal operation and lifespan. Furthermore, circuit breakers inevitably generate heat during operation, often requiring heat sinks for cooling. However, over time, dust and impurities accumulate on the heat sink surface, forming an insulating layer that severely weakens its heat dissipation efficiency. This results in excessively high internal temperatures, affecting electrical performance and stability. Cleaning the heat sinks in existing protective components is extremely tedious, requiring significant manpower and time, increasing maintenance costs and difficulty. Moreover, repairing or replacing internal electrical components typically involves specialized screwdrivers for disassembly and installation, requiring technicians to possess specific tools. This undoubtedly causes considerable inconvenience, prolongs repair time, and creates significant problems for actual use.

[0004] Furthermore, during the installation process, circuit breakers are mostly fixed to guide rails using a snap-fit ​​method. The existing fixing devices lack flexibility and cannot adaptively adjust to guide rails of various sizes, making it difficult to achieve convenient and efficient installation operations. This greatly limits their widespread application in different scenarios and causes many obstacles and troubles to actual engineering installation and use.

[0005] In view of this, we propose a protective device for circuit breakers. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this invention is to provide a protective device for circuit breakers to solve the problems mentioned in the background art.

[0008] 2. Technical Solution

[0009] A protective device for a circuit breaker includes a circuit breaker body, a snap-fit ​​groove formed on the rear outer wall of the circuit breaker body, a limit groove formed on the inner wall of a plurality of snap-fit ​​grooves, an electrical component body disposed inside the circuit breaker body, limit bolts threadedly fitted to the top and bottom of the circuit breaker body, and a protective assembly provided on the rear outer wall of the circuit breaker body, the protective assembly including a fixing frame.

[0010] Preferably, a rotating threaded rod is rotatably connected to the top of the fixing frame, and a connecting base is provided on the outer rear wall of the fixing frame.

[0011] Preferably, a movable clamping plate is sleeved on the outer circumference of the first rotating threaded rod, and a second rotating threaded rod is rotatably connected to the rear outer wall of the connecting base, with a pressure plate sleeved on the outer circumference of the second rotating threaded rod.

[0012] Preferably, the front outer wall of the fixing frame is provided with a snap-fit ​​block that matches the snap-fit ​​groove, and the outer walls on both sides of the fixing frame are provided with heat sinks, and the plurality of heat sinks are in contact with the outer walls on both sides of the circuit breaker body.

[0013] Preferably, the top of the plurality of snap-fit ​​blocks is provided with a through hole that matches the limit bolt, the inner walls on both sides of the plurality of snap-fit ​​blocks are respectively provided with a return spring, the ends of the plurality of return springs are connected to a limit block that matches the limit groove, and the outer wall on one side of the plurality of limit blocks is respectively provided with an inclined surface.

[0014] Preferably, a connecting frame is also provided on the front outer wall of the fixed frame, a plug-in frame is snapped into the connecting frame, and a drying plate is fixedly connected to the inner wall of the plug-in frame.

[0015] 3. Beneficial effects

[0016] Compared to existing technologies, the advantages of this invention are as follows: In actual operation, the drying plate plays a crucial role. When the ambient humidity of the circuit breaker is high, and there is a risk of moisture intruding into the circuit breaker body, the drying plate can effectively absorb the intruding moisture, thereby greatly reducing the possibility of moisture damaging the internal electrical components. Regarding heat dissipation, the multiple heat sinks equipped with the protective assembly work together to dissipate the heat generated during circuit breaker operation in a timely manner, maintaining its internal temperature within a normal range. Furthermore, when dust and impurities accumulate on the surface of the heat sinks and need to be cleaned, the operation is extremely simple; only the multiple limit bolts need to be loosened. Under the elastic action of multiple reset springs, multiple limit blocks will move in close proximity and quickly disengage from the limit grooves on the inner wall of the snap-fit ​​groove, allowing the circuit breaker body and the protective components to be easily separated. This allows staff to easily and thoroughly clean the heat sink, ensuring that its heat dissipation performance is always in good condition. After disassembling the protective components, the main electrical components inside the circuit breaker body will also be directly exposed, which greatly facilitates subsequent maintenance work. Staff can quickly locate the fault point and repair it, and the drying plate can also be replaced. Overall, it is more convenient to use and effectively improves its practicality.

[0017] When installing on guide rails of different sizes, the protective components offer a flexible and stable fixing effect. By rotating the first threaded rod, the moving clamping plate can be precisely lowered, cooperating with the connecting base to firmly clamp the circuit breaker body on the top and bottom of the guide rail. Then, rotating the second threaded rod again pushes the pressure plate forward, making it closely contact the rear outer wall of the guide rail. This multi-directional clamping and fixing method not only significantly improves the installation adaptability of the circuit breaker body and protective components on guide rails of different sizes, but also effectively enhances its stability after fixing. It effectively prevents the circuit breaker body from shifting or loosening due to vibration, external forces, or other factors during operation, ensuring that it is always in a reliable installation state and providing a solid guarantee for the stable operation of the power system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a rear view structural diagram of the circuit breaker body of this utility model;

[0020] Figure 3 This is a schematic diagram of the fixing frame structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the snap-fit ​​block structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the fixing frame structure of this utility model;

[0023] The following are the labels in the diagram: 100, Circuit breaker body; 110, Electrical component body; 120, Snap-fit ​​groove; 130, Limit bolt; 200, Fixing frame; 210, Snap-fit ​​block; 211, Limit block; 212, Return spring; 213, Through hole; 220, Heat sink; 230, Rotating threaded rod one; 240, Moving clamping plate; 241, Rotating threaded rod two; 242, Pressure plate; 250, Connecting base; 260, Connecting frame; 261, Plug-in frame; 262, Drying plate. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0025] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 utility model based on the specific circumstances.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] A protective device for a circuit breaker includes a circuit breaker body 100, a snap-fit ​​groove 120 formed on the rear outer wall of the circuit breaker body 100, a limit groove formed on the inner wall of a plurality of snap-fit ​​grooves 120, an electrical component body 110 disposed inside the circuit breaker body 100, a limit bolt 130 threadedly sleeved on the top and bottom of the circuit breaker body 100, and a protective assembly provided on the rear outer wall of the circuit breaker body 100, the protective assembly including a fixing bracket 200.

[0029] In some embodiments, the electrical component body 110 inside the circuit breaker body 100 is prior art and need not be described in detail.

[0030] Specifically, a rotating threaded rod 230 is rotatably connected to the top of the fixed frame 200, and a connecting base 250 is provided on the outer rear wall of the fixed frame 200.

[0031] Furthermore, a movable clamping plate 240 is sleeved on the outer circumference of the rotating threaded rod 230, and a rotating threaded rod 241 is rotatably connected to the outer wall of the connecting base 250. A pressure plate 242 is sleeved on the outer circumference of the rotating threaded rod 241, which facilitates the flexible fixing of the circuit breaker body 100 on guide rails of various sizes.

[0032] Furthermore, the front outer wall of the fixing frame 200 is provided with a snap-fit ​​block 210 that matches the snap-fit ​​groove 120, and the outer walls on both sides of the fixing frame 200 are provided with heat sinks 220. Multiple heat sinks 220 are attached to the outer walls on both sides of the circuit breaker body 100 to provide stable heat dissipation support for the circuit breaker body 100.

[0033] Furthermore, the top of the multiple snap-fit ​​blocks 210 is provided with through holes 213 that match the limit bolts 130. The inner walls on both sides of the multiple snap-fit ​​blocks 210 are respectively provided with return springs 212. The ends of the multiple return springs 212 are connected to limit blocks 211 that match the limit grooves. The outer walls on one side of the multiple limit blocks 211 are respectively provided with inclined surfaces, so that the limit blocks 211 on both sides can be moved by the pressure of the multiple limit bolts 130.

[0034] It is worth noting that a connecting frame 260 is also provided on the front outer wall of the fixed frame 200. A plug-in frame 261 is snapped into the connecting frame 260, and a drying plate 262 is fixedly connected to the inner wall of the plug-in frame 261.

[0035] In some embodiments, the drying plate 262 is a silica gel drying plate, and the power supply used by the device is an external conventional power source.

[0036] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0037] Working Principle: In actual operation, the drying plate 262 plays a crucial role. When the ambient humidity of the circuit breaker is high, and there is a risk of moisture intruding into the circuit breaker body 100, the drying plate 262 can effectively absorb the intruding moisture, thereby greatly reducing the possibility of moisture damaging the internal electrical components body 110. Regarding heat dissipation, the multiple heat sinks 220 equipped with the protective assembly work together to dissipate the heat generated during circuit breaker operation, maintaining its internal temperature within a normal range. When dust and impurities accumulate on the surface of the heat sinks and need cleaning, the operation is extremely simple. Just loosen the multiple limit bolts 130. At this time, under the elastic action of multiple return springs 212, multiple limit blocks 211 will move close together, quickly disengaging from the limit grooves on the inner wall of the locking groove 120, allowing the circuit breaker body 100 to easily separate from the protective assembly. This allows staff to conveniently perform a comprehensive cleaning of the heat sinks, ensuring that its heat dissipation performance remains in good condition. Furthermore, after disassembling the protective assembly, the electrical components body 110 inside the circuit breaker body 100 are easily removed. This also directly exposes the fault, greatly facilitating subsequent maintenance and repair work. Staff can quickly locate and repair the fault, and the drying plate can also be replaced, making overall use more convenient and effectively improving its practicality. When installing on guide rails of different sizes, its protective components also provide a flexible and stable fixing effect. By rotating the threaded rod 230, the moving clamping plate 240 can be precisely driven down, cooperating with the connecting base 250 to firmly clamp the circuit breaker body 100 on the top and bottom of the guide rail. Then, rotating the threaded rod 241 again pushes the pressure plate 242 forward, making it closely contact the rear outer wall of the guide rail. This multi-directional clamping and fixing method not only significantly improves the installation adaptability of the circuit breaker body and protective components on guide rails of different sizes, but also effectively enhances its stability after fixing, effectively preventing the circuit breaker body 100 from shifting or loosening due to vibration, external forces, or other factors during operation, ensuring it is always in a reliable installation state, and providing a solid guarantee for the stable operation of the power system.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A protective device for a circuit breaker, comprising a circuit breaker body (100), characterized in that: The circuit breaker body (100) has a snap-fit ​​groove (120) on its rear outer wall, and a limit groove is formed on the inner wall of the multiple snap-fit ​​grooves (120). An electrical component body (110) is provided inside the circuit breaker body (100). Limit bolts (130) are threadedly fitted on the top and bottom of the circuit breaker body (100). A protective component is provided on the rear outer wall of the circuit breaker body (100), and the protective component includes a fixing bracket (200).

2. A protective device for a circuit breaker according to claim 1, characterized in that: The top of the fixed frame (200) is rotatably connected to a rotating threaded rod (230), and a connecting base (250) is provided on the rear outer wall of the fixed frame (200).

3. A protective device for a circuit breaker according to claim 2, characterized in that: The outer circumference of the first rotating threaded rod (230) is fitted with a movable clamping plate (240), and the outer rear wall of the connecting base (250) is rotatably connected to the second rotating threaded rod (241), and the outer circumference of the second rotating threaded rod (241) is fitted with a pressure plate (242).

4. A protective device for a circuit breaker according to claim 3, characterized in that: The front outer wall of the fixing frame (200) is provided with a snap-fit ​​block (210) that matches the snap-fit ​​groove (120). The outer walls on both sides of the fixing frame (200) are provided with heat sinks (220), and multiple heat sinks (220) are attached to the outer walls on both sides of the circuit breaker body (100).

5. A protective device for a circuit breaker according to claim 4, characterized in that: The top of each of the multiple snap-fit ​​blocks (210) is provided with a through hole (213) that matches the limit bolt (130). The inner walls on both sides of the multiple snap-fit ​​blocks (210) are respectively provided with a return spring (212). The ends of the multiple return springs (212) are connected to a limit block (211) that matches the limit groove. The outer wall on one side of the multiple limit blocks (211) is respectively provided with an inclined surface.

6. A protective device for a circuit breaker according to claim 5, characterized in that: A connecting frame (260) is also provided on the front outer wall of the fixed frame (200). A plug-in frame (261) is snapped into the inside of the connecting frame (260). A drying plate (262) is fixedly connected to the inner wall of the plug-in frame (261).

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