Arc extinguishing device of molded case circuit breaker
By designing an adjustable arc-extinguishing plate and arc-conducting mechanism in the molded case circuit breaker, the problem of slow arc extinguishing speed is solved, achieving efficient arc handling under different operating conditions and ensuring the safety and stability of the circuit breaker.
Patent Information
- Application Number
- CN202520445886.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The existing molded case circuit breaker's internal arc extinguishing plate arrangement cannot be adjusted, resulting in a slow arc extinguishing speed and affecting the circuit breaker's performance.
An arc-extinguishing device comprising a fixed base, an arc-extinguishing mechanism, a conductive arc mechanism, and a tensioning mechanism was designed. By adjusting the position of the arc-extinguishing plate and the guidance of the conductive arc, efficient arc handling under different working conditions can be achieved.
It improves arc extinguishing efficiency, ensures the safety and stability of the circuit breaker under different current conditions, prevents current leakage, and guarantees the normal use of the circuit breaker.
Smart Images
Figure CN223956553U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of circuit breaker, especially to an arc extinguishing device of molded case circuit breaker. BACKGROUND
[0002] The molded case circuit breaker is a mechanical switch electrical appliance, can cut off the current automatically after the current exceeds the set value, protects the circuit and equipment from damage, and the arc extinguishing system is a very important functional component of the molded case circuit breaker, when the fault current caused by overload and short circuit occurs in the circuit, the contact breaks and generates arc, the arc extinguishing system plays the role of arc lengthening, breaking and extinguishing, but the internal arc breaking plate arrangement of the existing molded case circuit breaker cannot be adjusted, which often makes the device unable to perform targeted arc extinguishing treatment according to the size of the current, resulting in slow arc extinguishing speed and affecting the use of the circuit breaker, therefore, the utility model provides an arc extinguishing device of molded case circuit breaker. SUMMARY
[0003] The utility model aims at the problem of slow arc extinguishing speed caused by the unadjustable arrangement of arc breaking plates in the background art, and provides an arc extinguishing device of molded case circuit breaker.
[0004] The utility model discloses a kind of arc extinguishing devices of molded case circuit breaker, including fixed seat and the arc extinguishing mechanism at the bottom end of fixed seat, the arc extinguishing mechanism includes the clamping seat fixed in the bottom end of fixed seat, the inner wall of the clamping seat is fixedly connected with arc extinguishing box, the inner wall of the arc extinguishing box is fixedly connected with sliding rod on both sides, the outer wall of two sliding rods is slidably connected with arc breaking plate, the outer wall of multiple arc breaking plates is equipped with arc breaking port.
[0005] The outer wall of multiple arc breaking plates is provided with stretching mechanism on one side.
[0006] The bottom end of the fixed seat is provided with electric arc guiding mechanism on one side.
[0007] Optionally, the electric arc guiding mechanism includes extension plate fixed on one side of the top end of fixed seat, the top end of the extension plate is fixedly connected with multiple connection terminals, the bottom end of multiple connection terminals is fixedly connected with connection copper wire.
[0008] Optionally, the outer wall of multiple connection copper wires is fixedly connected with electrically conductive plate, the end away from connection copper wire of multiple electrically conductive plates is rotatably connected with rotating shaft, the end away from electrically conductive plate of the rotating shaft is rotatably connected with guiding arc plate.
[0009] Optionally, the outer wall of the guiding arc plate is penetrated with through hole on one side, and the through hole is located at the bottom end of the arc extinguishing box.
[0010] Optionally, the stretching mechanism comprises two fixed shafts fixed to one side of the plurality of arc-extinguishing plates, and the plurality of fixed shafts are rotationally connected with rotating arms at the ends away from the arc-extinguishing plates.
[0011] Optionally, the inner walls of the rotating arms are rotationally connected with spring terminals at the ends away from the fixed shafts, and the plurality of spring terminals are connected with the other side of the arc-extinguishing plates at the ends away from the rotating arms.
[0012] Optionally, the top ends of the plurality of arc-extinguishing plates are fixedly connected with telescopic rods at the center positions of the two fixed shafts, and the side of the arc-extinguishing plate close to one side is fixedly connected with a stretching terminal.
[0013] Compared with the prior art, the application has at least one of the following beneficial technical effects:
[0014] The arc-extinguishing device adjusts the position of the arc-extinguishing plates according to the stretching mechanism, so that the device improves the arc-extinguishing efficiency, thereby realizing efficient processing of electric arcs under different working conditions, avoiding slow arc-extinguishing speed caused by unreasonable arrangement of the arc-extinguishing plates, and affecting the use of the circuit breaker, and accurately guiding the electric arc into the arc-extinguishing mechanism through the electric arc guiding mechanism, preventing current overflow, and ensuring the safety of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 Fig. 1 is a perspective view of an arc-extinguishing device of a molded case circuit breaker;
[0016] Figure 2 Fig. 2 is a multi-angle perspective view of an arc-extinguishing device of a molded case circuit breaker;
[0017] Figure 3 Fig. 3 is a connection structure diagram of an arc-extinguishing plate;
[0018] Figure 4 Fig. 4 is a connection structure diagram of a stretching mechanism.
[0019] Fig. 1 is a perspective view of an arc-extinguishing device of a molded case circuit breaker; Fig. 2 is a multi-angle perspective view of an arc-extinguishing device of a molded case circuit breaker; Fig. 3 is a connection structure diagram of an arc-extinguishing plate; Fig. 4 is a connection structure diagram of a stretching mechanism. DETAILED DESCRIPTION
[0020] The technical solutions of the present application will be described clearly and completely below with reference to the drawings, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0021] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in a wide variety of different configurations. Therefore, the following detailed description of the embodiments of the present application, as provided in the drawings, is not intended to limit the scope of the application, but is merely representative of selected embodiments of the application.
[0022] All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present application without creative labor shall fall within the scope of protection of the present application.
[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0024] It should be noted that the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] Embodiment 1
[0027] As Figure 1 and Figure 2The utility model provides a kind of arc extinguishing device of moulded case circuit breaker, including fixed seat 1 and the arc extinguishing mechanism at the bottom end of fixed seat 1, arc extinguishing mechanism includes the clamping seat 8 fixed in the bottom end of fixed seat 1, the inner wall of clamping seat 8 is fixedly connected with arc extinguishing box 9, the inner wall both sides of arc extinguishing box 9 are fixedly connected with sliding rod 18, the outer wall of two sliding rods 18 is slidably connected with arc extinguishing plate 12, the outer wall of multiple arc extinguishing plates 12 is all set with arc split mouth 13, by setting clamping seat 8, so that arc extinguishing box 9 is firmly connected with fixed seat 1, for arc extinguishing box 9 protection positioning, prevent arc extinguishing box 9 from displacement in work, by setting sliding rod 18, for multiple arc extinguishing plate 12 accurate sliding track is provided, so that arc extinguishing plate 12 can along sliding rod 18 stably slide, so that arc extinguishing plate 12 can be flexibly adjusted position according to actual arc extinguishing demand, by setting arc split mouth 13, so that when arc enters arc extinguishing box 9, arc split mouth 13 can be divided into multiple small segments, increase the contact area of arc and arc extinguishing plate 12, utilize the heat dissipation performance of arc extinguishing plate 12 and the interaction with surrounding medium, accelerate the cooling and extinguishing of arc.
[0028] Need to be added, as Figure 2 、 Figure 3 And Figure 4As shown, the outer wall side of the plurality of arc extinguishing plates 12 is provided with a stretching mechanism, the stretching mechanism includes two fixed shafts 14 fixed on one side of the plurality of arc extinguishing plates 12, the ends of the plurality of fixed shafts 14 away from the arc extinguishing plates 12 are rotatably connected with rotating arms 15, the inner wall ends of the rotating arms 15 away from the fixed shafts 14 are rotatably connected with spring terminals 16, the ends of the plurality of spring terminals 16 away from the rotating arms 15 are connected with the other side of the arc extinguishing plates 12, the top ends of the plurality of arc extinguishing plates 12 are fixedly connected with telescopic rods 17 at the center positions of the two fixed shafts 14, one side of the arc extinguishing plate 12 on one side is fixedly connected with a stretching terminal 10, through the fixed shaft 14, the rotating arm 15 provides a stable rotating fulcrum, when the staff pulls the stretching terminal 10, the rotating arm 15 rotates around the fixed shaft 14, thereby driving the arc extinguishing plate 12 to slide on the sliding rod 18, through the spring terminal 16 rotatably connected with the inner wall end of the rotating arm 15 away from the fixed shaft 14, the spring terminal 16 can automatically adjust its telescopic degree according to the size and change of external force during the sliding of the arc extinguishing plate 12, providing an adjustable tension for the rotating arm 15 and the arc extinguishing plate 12, which can ensure the smooth sliding of the arc extinguishing plate 12, avoid impact and damage caused by sudden change of external force, and also can fine-tune the position of the arc extinguishing plate 12 within a certain range according to actual arc extinguishing requirements, through the setting of the telescopic rod 17, when the arc extinguishing plate 12 slides, the telescopic rod 17 synchronously telescopes, ensuring that the arc extinguishing plate 12 always maintains a horizontal state during the sliding process, avoiding tilting or jamming phenomenon. The stretching terminal 10 fixedly connected with one side of the arc extinguishing plate 12 on one side enables the operator to adjust the position of the arc extinguishing plate 12 by applying external force to the stretching terminal 10, for example, under different load current conditions, the spacing of the arc extinguishing plates 12 is adjusted through the stretching terminal 10, when the load current is large, the spacing of the arc extinguishing plates 12 is increased, the arc splitting port 13 is used to more effectively split the arc, and the arc extinguishing is accelerated, when the load current is small, the spacing of the arc extinguishing plates 12 is appropriately reduced, the arc extinguishing efficiency is improved, thereby realizing efficient treatment of the arc under different working conditions.
[0029] And, as Figure 1 And Figure 2As shown, the bottom end side of the fixed seat 1 is provided with an electric arc guiding mechanism, the electric arc guiding mechanism comprises an extension plate 2 fixed to the top end side of the fixed seat 1, a plurality of connection terminals 3 are fixedly connected to the top end of the extension plate 2, a plurality of copper wires 11 are fixedly connected to the bottom end of the plurality of connection terminals 3, a plurality of electrically conductive plates 4 are fixedly connected to the outer wall of the plurality of copper wires 11, a rotating shaft 5 is rotatably connected to one end of the plurality of electrically conductive plates 4 away from the copper wires 11, a guiding electric arc plate 6 is rotatably connected to one end of the rotating shaft 5 away from the electrically conductive plates 4, a through hole 7 penetrates through one side of the outer wall of the guiding electric arc plate 6, and the through hole 7 is located at the bottom end of the arc extinguishing box 9. By arranging the extension plate 2, the connection terminals 3 can be more conveniently connected with the external circuit, the plurality of connection terminals 3 are installed at the top end of the extension plate 2, so that the device can be stably connected to the external electric arc, and the electric arc is conducted to the connection copper wires 11 and the electrically conductive plates 4. By arranging the electrically conductive plates 4, the current is further concentrated and guided in a specific direction. By arranging the guiding electric arc plate 6, the guiding electric arc plate 6 can automatically adjust the angle according to the distribution of the electric field and the magnetic field in the circuit when the current is conducted to the electrically conductive plates 4 and an electric arc is generated, and the electric arc is accurately guided to the arc extinguishing plate 12 above.
[0030] In the embodiment, when the circuit breaker cuts off the current, the current generated when the electric arc is conducted to the electrically conductive plates 4 is guided to the arc extinguishing plate 12 above by the guiding electric arc plate 6, which automatically adjusts the angle according to the distribution of the electric field and the magnetic field in the circuit, and the electric arc is accurately guided to the arc extinguishing plate 12 above. By applying an external force to the stretching terminal 10, the position of the arc extinguishing plate 12 is adjusted. When the load current is large, the distance between the arc extinguishing plates 12 is increased, the arc is more effectively divided by the arc splitting hole 13, and the extinguishing of the electric arc is accelerated. When the load current is small, the distance between the arc extinguishing plates 12 is appropriately reduced, the arc extinguishing efficiency is improved, and the electric arc under different working conditions is efficiently processed.
[0031] The above specific embodiments are only several optional embodiments of the utility model, and based on the technical scheme of the utility model and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.
Claims
1. An arc-extinguishing device for a molded case circuit breaker, comprising a fixed base (1) and an arc-extinguishing mechanism located at the bottom end of the fixed base (1), characterized in that: The arc extinguishing mechanism includes a card seat (8) fixed to the bottom of the fixed base (1). An arc extinguishing box (9) is fixedly connected to the inner wall of the card seat (8). Sliding rods (18) are fixedly connected to both sides of the inner wall of the arc extinguishing box (9). An arc extinguishing plate (12) is slidably connected to the outer wall of the two sliding rods (18). An arc extinguishing port (13) is opened on the outer wall of the multiple arc extinguishing plates (12). A tensioning mechanism is provided on one side of the outer wall of each of the arc-extinguishing plates (12); A conductive arc mechanism is provided on one side of the bottom end of the fixed base (1).
2. The arc-extinguishing device for a molded case circuit breaker according to claim 1, characterized in that, The conductive arc mechanism includes an extension plate (2) fixed to one side of the top of the fixed base (1). The top of the extension plate (2) is fixedly connected to a plurality of connecting terminals (3), and the bottom of the plurality of connecting terminals (3) is fixedly connected to a connecting copper wire (11).
3. The arc-extinguishing device for a molded case circuit breaker according to claim 2, characterized in that, A conductive plate (4) is fixedly connected to the outer wall of a plurality of connecting copper wires (11). A rotating shaft (5) is rotatably connected to one end of the plurality of conductive plates (4) away from the connecting copper wires (11). A guide arc plate (6) is rotatably connected to one end of the rotating shaft (5) away from the conductive plate (4).
4. The arc-extinguishing device for a molded case circuit breaker according to claim 3, characterized in that, The outer wall of the guide arc plate (6) has a through-hole (7) on one side, and the through-hole (7) is located at the bottom of the arc extinguishing box (9).
5. The arc-extinguishing device for a molded case circuit breaker according to claim 1, characterized in that, The tensioning mechanism includes two fixed shafts (14) fixed to one side of the plurality of arc-extinguishing plates (12), and a rotating arm (15) is rotatably connected to one end of the plurality of fixed shafts (14) away from the arc-extinguishing plates (12).
6. The arc-extinguishing device for a molded case circuit breaker according to claim 5, characterized in that, A spring terminal (16) is rotatably connected to one end of the inner wall of the rotating arm (15) away from the fixed shaft (14), and one end of the multiple spring terminals (16) away from the rotating arm (15) is connected to the other side of the arc extinguishing plate (12).
7. The arc-extinguishing device for a molded case circuit breaker according to claim 1, characterized in that, The top of each of the arc-extinguishing plates (12) is fixedly connected to a telescopic rod (17) at the center of two fixed shafts (14), and a tension terminal (10) is fixedly connected to one side of the arc-extinguishing plate (12) on one side.