Arc extinguishing mechanism and circuit breaker
By designing an arc extinguishing mechanism with arc-separating parts in the circuit breaker, the problem of long arc combustion time of the circuit breaker when the circuit breaker is disconnected when the high current and DC current are disconnected, achieving more efficient arc extinguishing effect and lower manufacturing cost.
Patent Information
- Application Number
- CN202421469971.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-25
AI Technical Summary
When existing circuit breakers are disconnected from high current and DC current, the arc burning time is long, resulting in continuous arc failure of the circuit breaker.
An arc extinguishing mechanism is designed, including a moving contact, a static contact and an arc-sealing member. The movable contact drives the arc-sealing member to rotate, so that the arc-sealing part of the arc-sealing member is located between the moving contact and the static contact, and the arc-sealing part is used to separate the arc to reduce the arc-inflating time.
It effectively reduces the arc time of the arc between the moving contact and the static contact, reduces the probability of the circuit breaker failing due to continuous arcing, and reduces the manufacturing cost of the circuit breaker.
Smart Images
Figure CN222813542U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrical equipment, and in particular to an arc extinguishing mechanism and a circuit breaker. Background Art
[0002] Circuit breakers are important switchgear in power plants, capable of opening and closing, carrying and interrupting current in circuits. When the circuit breaker is opened, an arc will be generated between the moving contact and the stationary contact. In the prior art, circuit breakers generally use magnetic blowing and air blowing to extinguish the arc. Under the action of the magnetic field and air pressure, the arc is driven into the arc extinguishing chamber, thereby extinguishing the arc.
[0003] However, for interrupting large currents and direct currents, the generated arc often has a long arcing time, and the arc continues to burn between the moving contact and the stationary contact, which can cause the circuit breaker to continue to arc and cause the circuit breaker to fail. Utility Model Content
[0004] The present application provides an arc extinguishing mechanism and a circuit breaker, which improve the arc extinguishing efficiency of the circuit breaker.
[0005] In a first aspect, the present application provides an arc extinguishing mechanism, which is applied to a circuit breaker. The circuit breaker includes a housing, and the arc extinguishing mechanism includes a moving contact, a stationary contact, and an arc-isolating member. The moving contact and the arc-isolating member are both rotatably arranged in the housing, and the stationary contact is fixedly arranged in the housing, and the stationary contact cooperates with the moving contact. The moving contact is provided with a driving part, and the arc-isolating member is provided with a driven part and an arc-isolating member, and the driven part cooperates with the driving part. When the moving contact and the stationary contact are disconnected, the driving part drives the arc-isolating member to rotate in a first direction through the driven part, and rotates the arc-isolating member to be located between the moving contact and the stationary contact. When the moving contact and the stationary contact are closed, the driving part drives the arc-isolating member to rotate in a second direction through the driven part, and rotates the arc-isolating member out from between the moving contact and the stationary contact, and the second direction is opposite to the first direction.
[0006] Through the above scheme, the present application sets an arc extinguishing mechanism in the circuit breaker. When the circuit breaker is opened, the moving contact drives the arc-isolating member to rotate, so that the arc-isolating portion of the arc-isolating member rotates to between the moving contact and the static contact. The arc generated between the moving contact and the static contact can be isolated by the arc-isolating portion. In this way, the arc burning time of the arc between the moving contact and the static contact can be reduced, and the probability of failure of the circuit breaker due to continuous arc burning is reduced. When the circuit breaker is closed, the moving contact drives the arc-isolating member to rotate, so that the arc-isolating portion of the arc-isolating member rotates out from between the moving contact and the static contact. In this way, the setting of the arc-isolating member will not affect the basic use of the circuit breaker. In addition, the arc-isolating member of the present application has a simple structure and reduces the manufacturing cost of the circuit breaker.
[0007] In a possible design, the arc-isolating member includes a first arm and a second arm. The first arm includes a first end and a second end, the first end is closer to the moving contact relative to the second end, and the driven portion is arranged at the first end; the second arm includes a third end and a fourth end, the third end is closer to the stationary contact relative to the fourth end, and the arc-isolating portion is arranged at the third end. The second end and the fourth end are rotatably connected to the housing. There is a first non-zero angle between the first arm and the second arm.
[0008] By the above scheme, the arc-isolating member is set in the form of a combination of the first arm and the second arm, and the first arm and the second arm have a first non-zero angle, which can reduce the space required for the arc-isolating member to rotate, thereby saving the use of the internal space of the circuit breaker, and there is no need to increase the internal capacity of the housing of the circuit breaker to adapt the installation of the arc-isolating member. The driven part is set on the first end closer to the moving contact, which makes the linkage between the moving contact and the arc-isolating member easier, and the arc-isolating part is set on the fourth end closer to the static contact, which can reduce the distance required for the arc-isolating part to enter between the moving contact and the static contact, or to leave between the moving contact and the static contact, thereby saving the use of the internal space of the circuit breaker.
[0009] In a possible design, the first arm and / or the second arm are bent.
[0010] By the above scheme, the first arm is bent and arranged, so that the rotation radius of the arc-isolating member can be reduced, the space required for the normal use of the arc-isolating member is saved, the use of the internal space of the circuit breaker is saved, and the manufacturing cost of the circuit breaker is saved. The second arm is bent and arranged, so that the difficulty of arranging the arc-isolating part on the second arm can be reduced, and the manufacturing efficiency of the arc-isolating member is improved.
[0011] In a possible design, the arc isolation member further includes a third arm. The third arm includes a fifth end and a sixth end, the second end and the fourth end are both connected to the fifth end, and the sixth end is rotatably connected to the housing. A second non-zero angle is formed between the first arm and the third arm, and a third non-zero angle is formed between the second arm and the third arm.
[0012] Through the above scheme, the arc-isolating member is arranged in the form of a combination of the first arm, the second arm and the third arm, and a second non-zero angle is provided between the first arm and the third arm, and a third non-zero angle is provided between the second arm and the third arm. The length of the first arm and the second arm can be reduced without changing the original rotation radius of the arc-isolating member. In this way, the probability of the first arm and the second arm breaking during the movement can be reduced, the service life of the arc-isolating member is increased, and the maintenance cost required for the circuit breaker in the later stage is reduced.
[0013] In a possible design, the arc isolation member is further provided with a connecting portion, the connecting portion is connected to the sixth end, and the sixth end is rotatably connected to the shell through the connecting portion.
[0014] Through the above scheme, a connecting part is set on the arc isolation piece, and the arc isolation piece can be rotatably connected to the shell by utilizing the cooperation between the connecting part and the shell. This arrangement is relatively simple and the installation is also relatively convenient, which reduces the difficulty of rotating the arc isolation piece in the circuit breaker and reduces the time cost when assembling the circuit breaker.
[0015] In a possible design, the connecting portion is a first shaft, and a first hole is provided at a position of the housing opposite to the first shaft. Alternatively, the connecting portion is a first hole, and a first shaft is provided at a position of the housing opposite to the first hole. The first shaft extends into the first hole and can rotate relative to the first hole.
[0016] Through the above scheme, the connecting part is set in the form of a first axis or a first hole, and a corresponding first hole or first axis is set on the shell. The rotational connection between the arc isolation member and the shell is realized by utilizing the hole-axis matching method. Under a relatively simple structure, the rotation accuracy of the arc isolation member can be effectively guaranteed, thereby reducing the production cost of the arc isolation member and the use cost of the circuit breaker.
[0017] In a possible design, the driving part is a waist-shaped groove, the driven part is a second shaft, and the second shaft is slidably arranged in the waist-shaped groove. Alternatively, the driving part is the second shaft, the driven part is a waist-shaped groove, and the second shaft is slidably arranged in the waist-shaped groove.
[0018] Through the above scheme, the driving part is set as a waist-shaped groove, and the driven part is set as the second axis, or the driving part is set as the second axis, the driven part is set as a waist-shaped groove, and the matching of the driving part and the driven part is set as a hole-shaft matching method. This not only ensures the matching accuracy of the driving part and the driven part, and increases the reliability of the arc extinguishing mechanism, but also the hole-shaft matching method can effectively disperse the stress generated when the driving part and the driven part cooperate, reduces the possibility of damage to the driving part and the driven part, increases the service life of the arc extinguishing mechanism, and reduces the later maintenance cost of the circuit breaker.
[0019] In a possible design, the arc isolation portion is an arc-shaped plate, and the arc-shaped plate protrudes toward the static contact.
[0020] Through the above scheme, since the movement trajectory of the moving contact is arc-shaped, the arc-isolating part is set in the form of an arc-shaped plate, and the arc-shaped plate is protruded toward the static contact. When the circuit breaker is opened, the arc-isolating part can enter between the moving contact and the static contact to effectively block the moving contact and the static contact, thereby reducing the possibility of a gap between the moving contact and the static contact. The arc between the moving contact and the static contact can be effectively isolated, the arc burning time of the arc between the moving contact and the static contact is reduced, and the probability of failure of the circuit breaker due to continuous arc burning is reduced.
[0021] In a second aspect, the present application provides a circuit breaker, which includes a housing, two gas-generating sheets, and the arc-extinguishing mechanism mentioned in the first aspect. The two gas-generating sheets are located in the housing, and there is a gap between the two gas-generating sheets, and the static contact, the arc-isolating member, and part of the moving contact are located in the gap. The arc-isolating member is rotatably connected to the gas-generating sheet.
[0022] Through the above scheme, the circuit breaker provided in the present application is provided with an arc extinguishing mechanism. When the circuit breaker is opened, the arc-isolating member in the arc-extinguishing mechanism can isolate the arc generated between the moving contact and the static contact, thereby reducing the arc burning time of the arc between the moving contact and the static contact, and reducing the probability of failure of the circuit breaker due to continuous arc burning. In addition, the arc-isolating member provided in the present application has a simple structure and is easy to install, thereby reducing the manufacturing cost of the circuit breaker.
[0023] The beneficial effects of the circuit breaker provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the possible implementation methods of the first aspect, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A schematic diagram of the structure of a gas generating sheet installed inside the circuit breaker provided in an embodiment of the present application.
[0025] Figure 2 A schematic diagram of the structure of a circuit breaker provided in an embodiment of the present application with two gas generating sheets installed inside.
[0026] Figure 3 A schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application when the circuit breaker is in an open state.
[0027] Figure 4 for Figure 3 Magnified view of section A.
[0028] Figure 5 A schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application when the circuit breaker is in a closed state.
[0029] Figure 6 for Figure 5 Magnified view of section B.
[0030] Figure 7 A schematic diagram of the structure of the arc extinguishing mechanism of the circuit breaker in the open state provided in an embodiment of the present application.
[0031] Figure 8 A schematic diagram of the structure of the arc extinguishing mechanism of the circuit breaker in the closed state provided in an embodiment of the present application.
[0032] Fig. 9 A schematic diagram of one structure of the arc isolation member provided in an embodiment of the present application.
[0033] Fig.10 A schematic diagram of another structure of the arc isolation member provided in an embodiment of the present application.
[0034] Description of reference numerals:
[0035] 100, moving contact; 110, driving unit;
[0036] 200, static contact;
[0037] 300, arc-isolating member; 310, driven portion; 320, arc-isolating portion; 330, first arm; 331, first end; 332, second end; 340, second arm; 341, third end; 342, fourth end; 350, third arm; 351, fifth end; 352, sixth end; 360, connecting portion;
[0038] 400, housing;
[0039] 500, gas-producing tablets;
[0040] OX, first direction; OY, second direction. DETAILED DESCRIPTION
[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0043] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.
[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0045] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the static contact of a circuit breaker of the present application and the specific structure of the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.
[0047] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0048] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.
[0050] Figure 1 A schematic diagram of the structure of a gas generating sheet installed inside the circuit breaker provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the structure of a circuit breaker provided in an embodiment of the present application with two gas generating sheets installed inside. Figure 1 as well as Figure 2 As shown, the present application provides a circuit breaker, which includes a housing 400, two gas-generating sheets 500 and an arc extinguishing mechanism. The two gas-generating sheets 500 are located in the housing 400, and there is a gap between the two gas-generating sheets 500, and the static contact 200, the arc-isolating member 300 and part of the moving contact 100 are located in the gap. The arc-isolating member 300 is rotatably connected to the gas-generating sheet 500.
[0051] An installation space is provided inside the housing 400, and two gas-generating sheets 500 and an arc-extinguishing mechanism are both provided in the installation space. The two gas-generating sheets 500 can be provided in parallel, and there is a gap between the two gas-generating sheets 500, and the static contact 200, the arc-isolating member 300 and part of the moving contact 100 are located in the gap. An arc-extinguishing chamber is also provided inside the housing 400, and the arc-extinguishing chamber is provided on the side of the static contact 200 away from the moving contact 100.
[0052] When the circuit breaker is opened, the moving contact 100 is separated from the static contact 200, and an arc is generated between the moving contact 100 and the static contact 200. During the separation process of the moving contact 100 and the static contact 200, the moving contact 100 drives part of the arc-isolating member 300 to rotate between the moving contact 100 and the static contact 200, so that the arc-isolating member 300 can isolate the arc generated between the moving contact 100 and the static contact 200. At the same time, the arc generated between the moving contact 100 and the static contact 200 will cause instantaneous high temperature. The two gas-generating sheets 500 will generate a large amount of gas at high temperature, so that a pressure difference is formed between the two gas-generating sheets 500 and the outside world, thereby causing a gas blowing effect on the arc, and blowing the arc into the arc extinguishing chamber located on one side of the static contact 200 for arc extinguishing.
[0053] The specific movement process and the specific structure of the arc-isolating member 300 will be introduced later and will not be expanded here.
[0054] Figure 3 A schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application when the circuit breaker is in an open state. Figure 4 for Figure 3 Magnified view of section A. Figure 5 A schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application when the circuit breaker is in a closed state. Figure 6 for Figure 5Magnified view of section B.
[0055] like Figures 3 to 6 As shown, the present application provides an arc extinguishing mechanism, which includes a moving contact 100, a stationary contact 200 and an arc-isolating member 300. The moving contact 100 and the arc-isolating member 300 are both rotatably disposed in a housing 400, the stationary contact 200 is fixedly disposed in the housing 400, and the stationary contact 200 cooperates with the moving contact 100. The moving contact 100 is provided with a driving portion 110, and the arc-isolating member 300 is provided with a driven portion 310 and an arc-isolating portion 320, and the driven portion 310 cooperates with the driving portion 110. When the moving contact 100 and the stationary contact 200 are disconnected, the driving portion 110 drives the arc-isolating member 300 to rotate in a first direction OX through the driven portion 310, and causes the arc-isolating portion 320 to rotate to be located between the moving contact 100 and the stationary contact 200. When the moving contact 100 and the stationary contact 200 are closed, the driving part 110 drives the arc isolation member 300 to rotate in the second direction OY through the driven part 310, and makes the arc isolation part 320 rotate out from between the moving contact 100 and the stationary contact 200. The second direction OY is opposite to the first direction OX.
[0056] The moving contact 100 is movably connected in the circuit breaker, and the stationary contact 200 is fixedly arranged in the circuit breaker. Silver dots are arranged on both the moving contact 100 and the stationary contact 200. When the circuit breaker is closed, the moving contact 100 rotates in the first direction OX, and the silver dots on the moving contact 100 abut against the silver dots on the stationary contact 200. At this time, the current in the circuit breaker is turned on. When the circuit breaker is opened, the moving contact 100 rotates in the second direction OY, and the silver dots on the moving contact 100 and the silver dots on the stationary contact 200 are separated from each other. At this time, the current in the circuit breaker is disconnected.
[0057] The first direction OX may be a direction in which the moving contact 100 approaches the stationary contact 200, and the second direction OY may be a direction in which the moving contact 100 moves away from the stationary contact 200. Alternatively, please refer to 3 to Figure 6 As shown, the first direction OX may be a counterclockwise direction, and the second direction OY may be a clockwise direction.
[0058] The driving part 110 may be a protrusion structure or a groove structure provided on the moving contact 100. The driving part 110 may be integrally formed with the moving contact 100 when the moving contact 100 is formed. The driving part 110 may also be formed separately from the moving contact 100 and then assembled. Alternatively, the driving part 110 may be provided on the moving contact 100 by carving or grooving after the moving contact 100 is formed.
[0059] The driven portion 310 may be a raised structure or a groove structure provided on the arc isolation member 300. The driven portion 310 may be integrally formed with the arc isolation member 300 when the arc isolation member 300 is formed. The driven portion 310 may also be formed separately from the arc isolation member 300 and then assembled. Alternatively, the driven portion 310 may be provided on the arc isolation member 300 by carving or grooving after the arc isolation member 300 is formed.
[0060] The arc-isolating portion 320 may be a protruding structure provided on the arc-isolating member 300, and may be columnar or plate-shaped. The arc-isolating portion 320 may be integrally formed with the arc-isolating member 300, or the arc-isolating portion 320 may be separately formed from the arc-isolating member 300 and then assembled. The arc-isolating portion 320 may isolate the arc generated between the moving contact 100 and the stationary contact 200 after the moving contact 100 and the stationary contact 200 are separated.
[0061] When the circuit breaker is opened, the moving contact 100 is disconnected from the static contact 200. At this time, the moving contact 100 rotates in the second direction OY. The driving part 110 provided on the moving contact 100 drives the driven part 310 provided on the arc isolation member 300 to rotate the arc isolation member 300 in the first direction OX, thereby causing the arc isolation part 320 provided on the arc isolation member 300 to rotate to be located between the moving contact 100 and the static contact 200.
[0062] When the circuit breaker is closed, the moving contact 100 and the static contact 200 are closed. At this time, the moving contact 100 rotates in the first direction OX. The driving part 110 provided on the moving contact 100 drives the driven part 310 provided on the arc isolation member 300 to rotate the arc isolation member 300 in the second direction OY, thereby causing the arc isolation part 320 provided on the arc isolation member 300 to rotate out from between the moving contact 100 and the static contact 200.
[0063] In summary, the present application sets an arc extinguishing mechanism in the circuit breaker. When the circuit breaker is opened, the moving contact 100 drives the arc-isolating member 300 to rotate, so that the arc-isolating portion 320 of the arc-isolating member 300 rotates to between the moving contact 100 and the stationary contact 200. The arc-isolating portion 320 can be used to isolate the arc generated between the moving contact 100 and the stationary contact 200. In this way, the arc burning time of the arc between the moving contact 100 and the stationary contact 200 can be reduced, and the probability of failure of the circuit breaker due to continuous arc burning is reduced. When the circuit breaker is closed, the moving contact 100 drives the arc-isolating member 300 to rotate, so that the arc-isolating portion 320 of the arc-isolating member 300 rotates out from between the moving contact 100 and the stationary contact 200. In this way, the setting of the arc-isolating member 300 will not affect the basic use of the circuit breaker. In addition, the arc-isolating member 300 of the present application has a simple structure and reduces the manufacturing cost of the circuit breaker.
[0064] The driving part 110 and the driven part 310 may be arranged in various forms, and this application only exemplifies one of them. Figure 7 A schematic diagram of the structure of the arc extinguishing mechanism of the circuit breaker in the open state provided in an embodiment of the present application. Figure 8 A schematic diagram of the structure of the arc extinguishing mechanism of the circuit breaker in the closed state provided in an embodiment of the present application.
[0065] The driving part 110 and the driven part 310 may be hole-shaft matched. The driving part 110 may be a waist-shaped groove, and the driven part 310 may be a second shaft, and the second shaft is slidably disposed in the waist-shaped groove. Alternatively, the driving part 110 may be a second shaft, and the driven part 310 may be a waist-shaped groove, and the second shaft is slidably disposed in the waist-shaped groove.
[0066] The waist-shaped groove may be a through groove or a blind groove. The waist-shaped groove may be integrally formed with the moving contact 100, or the waist-shaped groove may be provided on the moving contact 100 by carving or grooving after the moving contact 100 is formed, or the waist-shaped groove may be integrally formed with the arc-isolating member 300, or the waist-shaped groove may be provided on the arc-isolating member 300 by carving or grooving after the arc-isolating member 300 is formed.
[0067] The second shaft may be cylindrical, etc. The second shaft may be integrally formed with the moving contact 100, or the second shaft may be separately formed with the moving contact 100 and then assembled, or the second shaft may be integrally formed with the arc-isolating member 300, or the second shaft may be separately formed with the arc-isolating member 300 and then assembled.
[0068] Through the above-mentioned settings, the driving part 110 is set as a waist-shaped groove, and the driven part 310 is set as the second axis, or the driving part 110 is set as the second axis, the driven part 310 is set as a waist-shaped groove, and the matching of the driving part 110 and the driven part 310 is set as a hole-shaft matching mode. This not only ensures the matching accuracy of the driving part 110 and the driven part 310, but also increases the reliability of the arc extinguishing mechanism. In addition, the hole-shaft matching mode can also effectively disperse the stress generated when the driving part 110 and the driven part 310 match, thereby reducing the possibility of damage to the driving part 110 and the driven part 310, increasing the service life of the arc extinguishing mechanism, and reducing the later maintenance cost of the circuit breaker.
[0069] There are many ways to set the arc isolation part 320, and this application only takes one of them as an example. Figure 7 as well as Figure 8 As shown, the arc isolation portion 320 is an arc-shaped plate, and the arc-shaped plate protrudes toward the static contact 200 .
[0070] Through the above-mentioned arrangement, since the movement trajectory of the moving contact 100 is arc-shaped, the arc-isolating portion 320 is arranged in the form of an arc-shaped plate, and the arc-shaped plate is made to protrude toward the static contact 200. When the circuit breaker is opened, the arc-isolating portion 320 can enter between the moving contact 100 and the static contact 200 to effectively isolate the moving contact 100 and the static contact 200, thereby reducing the possibility of a gap between the moving contact 100 and the static contact 200. The arc between the moving contact 100 and the static contact 200 can be effectively isolated, thereby reducing the arc burning time of the arc between the moving contact 100 and the static contact 200, and reducing the probability of failure of the circuit breaker due to continuous arc burning.
[0071] Next, the specific structure of the arc isolation member 300 will be described. Fig. 9 This is a schematic diagram of one structure of the arc isolation member provided in the embodiment of the present application. Figure 1 as well as Fig. 9 As shown, the arc-isolating member 300 includes a first arm 330 and a second arm 340. The first arm 330 includes a first end 331 and a second end 332, the first end 331 is closer to the moving contact 100 relative to the second end 332, and the driven portion 310 is arranged at the first end 331; the second arm 340 includes a third end 341 and a fourth end 342, the third end 341 is closer to the stationary contact 200 relative to the fourth end 342, and the arc-isolating portion 320 is arranged at the third end 341. The second end 332 and the fourth end 342 are rotatably connected to the housing 400. A first non-zero angle is formed between the first arm 330 and the second arm 340.
[0072] The first arm 330 may be in a columnar or plate-like shape, etc., and the second arm 340 may be in a columnar or plate-like shape. The first arm 330 and the second arm 340 may be integrally formed to form the arc-isolating member 300, or the first arm 330 and the second arm 340 may be separately formed and then assembled to form the arc-isolating member 300. The end of the first arm 330 close to the moving contact 100 is the first end 331, the end of the first arm 330 close to the second arm 340 is the second end 332, the end of the second arm 340 close to the stationary contact 200 is the third end 341, and the end of the second arm 340 close to the first arm 330 is the fourth end 342.
[0073] The driven portion 310 is provided at the first end 331 so that the driving portion 110 provided on the moving contact 100 can cooperate with the driven portion 310, and the arc-isolating portion 320 is provided at the third end 341 so that the arc-isolating portion 320 can more easily enter between the moving contact 100 and the stationary contact 200, or leave between the moving contact 100 and the stationary contact 200. The second end 332 and the fourth end 342 can be fixedly connected, and the second end 332 and the fourth end 342 can be rotatably connected to the housing 400 by a hole-shaft connection or the like.
[0074] The first non-zero angle may be 60°, 90°, or 120°, etc. For example Figure 7 As shown in FIG. 3 , the angle between the first arm 330 and the second arm 340 is 60°.
[0075] By the above arrangement, the arc-isolating member 300 is set in the form of a combination of the first arm 330 and the second arm 340, and the first arm 330 and the second arm 340 have a first non-zero angle, which can reduce the space required for the arc-isolating member 300 to rotate, thereby saving the use of the internal space of the circuit breaker, and there is no need to increase the internal capacity of the housing 400 of the circuit breaker to adapt the installation of the arc-isolating member 300. The driven portion 310 is arranged on the first end 331 closer to the moving contact 100, which can make the linkage between the moving contact 100 and the arc-isolating member 300 easier, and the arc-isolating member 320 is arranged on the fourth end 342 closer to the static contact 200, which can reduce the distance required for the arc-isolating member 320 to enter between the moving contact 100 and the static contact 200, or to leave between the moving contact 100 and the static contact 200, thereby saving the use of the internal space of the circuit breaker.
[0076] Please continue to refer to Figure 1 as well as Fig. 9 As shown, the first arm 330 and / or the second arm 340 are bent.
[0077] The first end 331 of the first arm 330 can be bent toward the moving contact 100. The third end 341 of the second arm 340 can be bent toward the stationary contact 200.
[0078] By the above arrangement, the first arm 330 is bent to reduce the rotation radius of the arc-isolating member 300, saving the space required for normal use of the arc-isolating member 300, saving the use of the internal space of the circuit breaker, and saving the manufacturing cost of the circuit breaker. The second arm 340 is bent to reduce the difficulty of setting the arc-isolating portion 320 on the second arm 340, thereby improving the manufacturing efficiency of the arc-isolating member 300.
[0079] Fig.10 This is a schematic diagram of another structure of the arc isolation member provided in the embodiment of the present application. Figure 1 as well as Fig.10 As shown, the arc isolation member 300 may further include a third arm 350. The third arm 350 includes a fifth end 351 and a sixth end 352, the second end 332 and the fourth end 342 are both connected to the fifth end 351, and the sixth end 352 is rotatably connected to the housing 400. A second non-zero angle is formed between the first arm 330 and the third arm 350, and a third non-zero angle is formed between the second arm 340 and the third arm 350.
[0080] The third arm 350 may be columnar or plate-shaped, etc. The third arm 350 may be integrally formed with the first arm 330 and the second arm 340 to form the arc isolation member 300 , or the third arm 350 may be separately formed with the first arm 330 and the second arm 340 and then assembled into the arc isolation member 300 .
[0081] The fifth end 351 may be an end of the third arm 350 close to the second end 332 and the fourth end 342, and the second end 332 and the fourth end 342 are both connected to the fifth end 351. The sixth end 352 may be rotatably connected to the housing 400 by a hole-shaft connection or the like, so that the arc isolation member 300 may be rotatably connected to the housing 400.
[0082] The second non-zero angle may be 60°, 90°, or 120°, etc. The third non-zero angle may be 60°, 90°, or 120°, etc.
[0083] Through the above-mentioned setting, the arc-isolating member 300 is set to be a combination of the first arm 330, the second arm 340 and the third arm 350, and a second non-zero angle is provided between the first arm 330 and the third arm 350, and a third non-zero angle is provided between the second arm 340 and the third arm 350. The length of the first arm 330 and the second arm 340 can be reduced without changing the original rotation radius of the arc-isolating member 300. In this way, the probability of the first arm 330 and the second arm 340 breaking during the movement can be reduced, thereby increasing the service life of the arc-isolating member 300 and reducing the maintenance cost required for the circuit breaker in the later stage.
[0084] like Figure 1 as well as Fig. 9 As shown, the arc isolation member 300 is further provided with a connecting portion 360, the connecting portion 360 is connected to the second end 332 and the fourth end 342, and the second end 332 and the fourth end 342 are rotatably connected to the housing 400 through the connecting portion 360, or, as shown Figure 1 As shown in FIG. 910 , the connection portion 360 is connected to the sixth end 352 , and the sixth end 352 is rotatably connected to the shell 400 through the connection portion 360 .
[0085] The connecting part 360 is a connecting part provided on the arc isolation member 300. The connecting part 360 can be integrally formed with the first arm 330 and the second arm 340, or the connecting part 360 can be separately formed with the first arm 330 and the second arm 340 and then assembled. In this way, the second end 332 and the fourth end 342 can be connected first and then connected to the connecting part 360, or the second end 332 and the fourth end 342 can also be connected to the connecting part 360 separately.
[0086] The connecting portion 360 may also be integrally formed with the third arm 350 , or the connecting portion 360 and the third arm 350 may be separately formed and then assembled.
[0087] Through the above-mentioned setting, a connecting portion 360 is set on the arc isolation member 300. By utilizing the cooperation between the connecting portion 360 and the shell 400, the arc isolation member 300 can be rotatably connected to the shell 400. This setting is relatively simple and the installation is also relatively convenient, which reduces the difficulty of rotating the arc isolation member 300 in the circuit breaker and reduces the time cost when assembling the circuit breaker.
[0088] There are many ways to connect the connection part 360 and the housing 400. This application only takes the way that the connection part 360 and the housing 400 are connected through a hole and an axis as an example. The connection part 360 is a first axis, and the housing 400 is provided with a first hole at a position opposite to the first axis. Alternatively, the connection part 360 is a first hole, and the housing 400 is provided with a first axis at a position opposite to the first hole. The first axis extends into the first hole and can rotate relative to the first hole.
[0089] The first shaft may be cylindrical, etc. The first shaft may be integrally formed with the arc isolation member 300, or the first shaft and the arc isolation member 300 may be separately formed and then assembled. Alternatively, the first shaft may be integrally formed with the shell 400, or the first shaft and the shell 400 may be separately formed and then assembled.
[0090] The first hole may be a through hole or a blind hole, etc. The first hole may be integrally formed with the arc isolation member 300, or the first hole may be provided on the connecting member by carving or slotting after the arc isolation member 300 is formed, or the first hole may be integrally formed with the housing 400, or the first hole may be provided on the housing 400 by carving or slotting after the housing 400 is formed. The aperture of the first hole may be equal to or slightly larger than the diameter of the first shaft.
[0091] Through the above-mentioned arrangement, the connecting portion 360 is arranged in the form of a first axis or a first hole, and a corresponding first hole or first axis is arranged on the shell 400. The rotational connection between the arc isolation member 300 and the shell 400 is realized by utilizing the hole-axis matching method. Under a relatively simple structure, the rotation accuracy of the arc isolation member 300 can also be effectively guaranteed, thereby reducing the production cost of the arc isolation member 300 and the use cost of the circuit breaker.
Claims
1. An arc extinguishing mechanism, applied to a circuit breaker, the circuit breaker comprising a housing, characterized in that: The arc extinguishing mechanism comprises a moving contact, a stationary contact and an arc-isolating member, wherein the moving contact and the arc-isolating member are both rotatably arranged in the housing, the stationary contact is fixedly arranged in the housing, and the stationary contact cooperates with the moving contact; The moving contact is provided with a driving part, and the arc-isolating member is provided with a driven part and an arc-isolating part, and the driven part cooperates with the driving part; When the moving contact is disconnected from the stationary contact, the driving part drives the arc-isolating member to rotate in a first direction through the driven part, and causes the arc-isolating member to rotate to be located between the moving contact and the stationary contact; When the moving contact and the stationary contact are closed, the driving part drives the arc-isolating member to rotate in a second direction through the driven part, and causes the arc-isolating member to rotate out from between the moving contact and the stationary contact, and the second direction is opposite to the first direction.
2. The arc extinguishing mechanism according to claim 1, characterized in that: The arc isolation member includes a first arm and a second arm; The first arm includes a first end and a second end, the first end is closer to the moving contact than the second end, and the driven portion is arranged at the first end; the second arm includes a third end and a fourth end, the third end is closer to the stationary contact than the fourth end, and the arc-isolating portion is arranged at the third end; The second end and the fourth end are rotatably connected to the housing; A first non-zero angle is formed between the first arm and the second arm.
3. The arc extinguishing mechanism according to claim 2, characterized in that: The first arm and / or the second arm are bent.
4. The arc extinguishing mechanism according to claim 2, characterized in that: The arc isolation member further includes a third arm; The third arm comprises a fifth end and a sixth end, the second end and the fourth end are both connected to the fifth end, and the sixth end is rotatably connected to the housing; A second non-zero angle is formed between the first arm and the third arm, and a third non-zero angle is formed between the second arm and the third arm.
5. The arc extinguishing mechanism according to claim 4, characterized in that: The arc isolation member is further provided with a connecting portion, the connecting portion is connected to the sixth end, and the sixth end is rotatably connected to the shell through the connecting portion.
6. The arc extinguishing mechanism according to claim 5, characterized in that: The connecting portion is a first shaft, and a first hole is provided at a position of the housing opposite to the first shaft; or, the connecting portion is a first hole, and a first shaft is provided at a position of the housing opposite to the first hole; The first shaft extends into the first hole and can rotate relative to the first hole.
7. The arc extinguishing mechanism according to any one of claims 1 to 6, characterized in that: The driving part is a waist-shaped groove, the driven part is a second shaft, and the second shaft is slidably disposed in the waist-shaped groove; or The driving part is a second shaft, the driven part is a waist-shaped groove, and the second shaft is slidably arranged in the waist-shaped groove.
8. The arc extinguishing mechanism according to claim 1, characterized in that: The arc isolation portion is an arc-shaped plate, and the arc-shaped plate protrudes toward the static contact.
9. A circuit breaker, characterized in that: It comprises a housing and two gas-generating sheets, and an arc-extinguishing mechanism as claimed in any one of claims 1 to 8; The two gas generating sheets are located in the housing, and there is a gap between the two gas generating sheets, and the static contact, the arc isolation member and part of the moving contact are located in the gap; The arc isolation member is rotatably connected to the gas generating sheet.