Arc isolation assembly and circuit breaker

Abstract

The utility model discloses an arc isolation assembly and a circuit breaker, and relates to the technical field of circuit breakers, the arc isolation assembly comprises a first partition plate, a supporting part and a second partition plate which are integrally arranged, and the first partition plate and the second partition plate are oppositely arranged on the two sides of the supporting part and define a containing cavity, an arc striking cavity and an arc running cavity which are communicated with each other. The containing cavity is located on the side, close to the supporting part, of the arc striking cavity, and the arc running cavity is located on the side, away from the supporting part, of the arc striking cavity and communicates with the arc extinguishing assembly. The contact assembly comprises a moving contact, and after the contact assembly is disconnected, part of the moving contact is located in the containing cavity. The distance between the first partition plate and the second partition plate in the containing cavity is a first distance, the distance between the first partition plate and the second partition plate in the arc striking cavity is a second distance, the distance between the first partition plate and the second partition plate in the arc running cavity is a third distance, the first distance is smaller than the second distance, and the second distance is smaller than the third distance. According to the arc isolating assembly and the circuit breaker, the arc isolating and striking effects can be improved, and the risk of damage caused by electric arcs is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to an arc separation assembly and a circuit breaker. BACKGROUND

[0002] During the closing and opening of the circuit breaker, arc is prone to occur at the contact assembly of the circuit breaker. The arc has voltage and high temperature, which can damage the circuit breaker. Therefore, an arc separation assembly and an arc extinguishing assembly are usually arranged in the circuit breaker to limit the arc and accelerate the extinguishing of the arc, thereby reducing the risk of arc spreading.

[0003] The existing arc separation assembly usually includes two arc separation plates arranged at intervals. The two arc separation plates are oppositely arranged in the housing of the circuit breaker and are located on both sides of the contact assembly. In this way, the arc can be limited, and the risk of arc spreading can be reduced.

[0004] However, the existing arc separation assembly has poor arc guiding effect, which is not conducive to fast arc extinguishing and affects the use safety of the circuit breaker. CONTENT OF THE INVENTION

[0005] The present application aims to provide an arc separation assembly and a circuit breaker, which can improve the arc separation and arc guiding effect and reduce the risk of damage caused by arc.

[0006] In a first aspect, an arc separation assembly is provided according to the embodiments of the present application, which is arranged in cooperation with a contact assembly and an arc extinguishing assembly. The arc separation assembly includes a first separation plate, a support portion and a second separation plate arranged integrally. The first separation plate and the second separation plate are oppositely arranged on both sides of the support portion. The first separation plate, the support portion and the second separation plate enclose a communication accommodating cavity, an arc guiding cavity and an arc running cavity.

[0007] The accommodating cavity is located on one side of the arc guiding cavity close to the support portion. The arc running cavity is located on the other side of the arc guiding cavity away from the support portion, and the arc running cavity is in communication with the arc extinguishing assembly. The contact assembly includes a movable contact. After the contact assembly is disconnected, part of the movable contact is located in the accommodating cavity.

[0008] In the accommodating cavity, the distance between the first separation plate and the second separation plate is a first distance. In the arc guiding cavity, the distance between the first separation plate and the second separation plate is a second distance. In the arc running cavity, the distance between the first separation plate and the second separation plate is a third distance. The first distance is smaller than the second distance, and the second distance is smaller than the third distance.

[0009] The first partition plate, the second partition plate and the support part are integrally arranged, so that the arc separation assembly has a stable structure, and the first partition plate and the second partition plate can be accurately matched to play a stable arc separation role. Meanwhile, the region formed by the first partition plate, the second partition plate and the support part is divided into the accommodating cavity, the arc leading cavity and the arc running cavity from small to large according to the space, so that the electric arc moves from the accommodating cavity to the arc running cavity through the arc leading cavity along the airflow, which is beneficial to quickly leading the electric arc out of the arc separation assembly into the arc extinguishing assembly, effectively improves the arc separation and arc extinguishing effects, and reduces the possibility of electric arc diffusion.

[0010] In some examples, the first partition plate comprises a first side wall and a second side wall connected with each other, and the second partition plate comprises a fourth side wall and a fifth side wall connected with each other, the first side wall and the fourth side wall form the accommodating cavity, and the second side wall and the fifth side wall form the arc leading cavity. The first partition plate is provided with a first guide part connected with the first side wall and the second side wall, and / or the second partition plate is provided with a second guide part connected with the fourth side wall and the fifth side wall.

[0011] The first guide part is arranged between the first side wall and the second side wall, and the second guide part is arranged between the fourth side wall and the fifth side wall, so that a smooth transition is formed between the accommodating cavity and the arc leading cavity, which is beneficial to the smooth flow of the high-temperature airflow in the arc separation space, so as to smoothly move the electric arc from the accommodating cavity to the arc leading cavity, reduce the possibility of the electric arc staying in the accommodating cavity or between the accommodating cavity and the arc leading cavity, and improve the arc leading effect.

[0012] In some examples, the first partition plate further comprises a third side wall, and the second partition plate further comprises a sixth side wall, the third side wall and the sixth side wall form the arc running cavity. The first partition plate is provided with a third guide part connected with the second side wall and the third side wall, and / or the second partition plate is provided with a fourth guide part connected with the fifth side wall and the sixth side wall.

[0013] The third guide part is arranged between the second side wall and the third side wall, and the fourth guide part is arranged between the fifth side wall and the sixth side wall, so that a smooth transition is formed between the arc leading cavity and the arc running cavity, which is beneficial to the smooth flow of the high-temperature airflow in the arc separation space, so as to smoothly move the electric arc from the arc leading cavity to the arc running cavity, reduce the possibility of the electric arc staying in the arc leading cavity or between the arc leading cavity and the arc running cavity, and improve the arc leading effect.

[0014] In some examples, the first distance gradually increases from the side of the accommodating cavity close to the support part to the side away from the support part. And / or, the second distance gradually increases from the side of the arc leading cavity close to the accommodating cavity to the side away from the accommodating cavity. And / or, the third distance gradually increases from the side of the arc running cavity close to the arc leading cavity to the side away from the arc leading cavity.

[0015] The first spacing in the accommodating cavity gradually increases, so that the accommodating cavity forms a cavity with gradually increasing space from the side close to the support part to the side close to the arc striking cavity, which is beneficial to the movement of the electric arc in the accommodating cavity to the side close to the arc striking cavity and finally into the arc striking cavity, and can further improve the arc separation and arc striking effect. The arc striking cavity and the arc running cavity are arranged in this form and have the same technical effect, which will not be described here.

[0016] In some examples, at least one first arc running channel is arranged on the third side wall, the first arc running channel is arranged in an arc shape, a first end of the first arc running channel is connected to the third guide part, and a second end of the first arc running channel is connected to the arc extinguishing assembly. In addition, at least one second arc running channel is arranged on the sixth side wall, the second arc running channel is arranged in an arc shape, a first end of the second arc running channel is connected to the fourth guide part, and a second end of the second arc running channel is connected to the arc extinguishing assembly.

[0017] The arrangement of the first arc running channel and the second arc running channel can form an accurate guide path in the arc running cavity, so that after the electric arc enters the arc running cavity from the arc striking cavity, the electric arc can accurately and quickly move to the side of the arc running cavity away from the arc striking cavity along the guide path, and smoothly enter the arc extinguishing assembly, thereby effectively improving the arc striking effect of the arc separation assembly.

[0018] In some examples, a first limiting part is arranged on the side of the first partition plate away from the support part, a second limiting part is arranged on the side of the second partition plate away from the support part, the first limiting part and the second limiting part form an assembly groove, and the assembly groove is connected to the arc striking cavity and the arc running cavity. The contact assembly includes a static contact, and the static contact is at least partially arranged in the assembly groove.

[0019] The assembly groove formed by the first limiting part and the second limiting part can fix and install the static contact, thereby improving the cooperation stability between the static contact and the arc separation assembly, reducing the possibility of diffusion of the electric arc from the static contact, and improving the arc separation effect of the arc separation assembly.

[0020] In some examples, a baffle is arranged on the side of the first partition plate away from the support part, and the baffle abuts against the second partition plate.

[0021] The baffle arranged on the first partition plate abuts against the second partition plate, so that the baffle and the support part can support the side of the first partition plate and the second partition plate away from the support part, and ensure that the first partition plate and the second partition plate are kept apart to provide stable arc separation and arc striking effect.

[0022] In some examples, a first mounting cavity is arranged on the side of the first partition plate away from the second partition plate, a first magnet is arranged in the first mounting cavity, a second mounting cavity is arranged on the side of the second partition plate away from the first partition plate, a second magnet is arranged in the second mounting cavity, and the first magnet and the second magnet generate a magnetic field between the first partition plate and the second partition plate. The magnetic field can guide the electric arc to the arc extinguishing assembly.

[0023] By arranging the first magnet on the first partition plate and the second magnet on the second partition plate, and by the magnetic field formed between the first partition plate and the second partition plate by the first magnet and the second magnet, the magnetic blow effect on the electric arc is achieved, which is conducive to the quick movement of the electric arc from the arc separation assembly to the arc extinguishing assembly, and improves the arc separation and arc striking effect of the arc separation assembly.

[0024] In some examples, the support part includes a main body segment, a first pre-bending segment and a second pre-bending segment, the first pre-bending segment and the second pre-bending segment are arranged on opposite sides of the main body segment, the first partition plate is connected with the first pre-bending segment, and the second partition plate is connected with the second pre-bending segment.

[0025] The main body segment of the support part is used to play a supporting role, and the first pre-bending segment and the second pre-bending segment are arranged to achieve a soft connection between the first partition plate and the main body segment and between the second partition plate and the main body segment, which facilitates the integrated molding of the arc separation assembly without affecting the supporting role of the support part.

[0026] In a second aspect, the embodiments of the present application further provide a circuit breaker, which includes a contact assembly, an arc extinguishing assembly and the above-mentioned arc separation assembly, and the arc separation assembly cooperates with the contact assembly and the arc extinguishing assembly.

[0027] The arc separation assembly provided by the embodiments can simultaneously play the roles of blocking and guiding the electric arc, which not only reduces the possibility of electric arc diffusion, but also accelerates the speed of the electric arc entering the arc extinguishing assembly, improves the arc extinguishing efficiency of the circuit breaker, and thus reduces the negative impact of the electric arc on the safety of each component of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0029] Figure 1 The circuit breaker provided by the embodiments of the present application is shown in the exploded view.

[0030] Figure 2 The structure schematic view of the contact assembly, the arc extinguishing assembly and the arc separation assembly provided by the embodiments of the present application is shown.

[0031] Figure 3 The structure schematic view of the arc separation assembly in the manufacturing state provided by the embodiments of the present application is shown.

[0032] Figure 4 The structure schematic view of the arc separation assembly in the molding state provided by the embodiments of the present application is shown.

[0033] Figure 5 A schematic view of the arc separation assembly cooperating with the contact assembly is provided for the embodiments of the present application.

[0034] Figure 6 A schematic view of the arc separation assembly cooperating with the contact assembly is provided for the embodiments of the present application. Figure 5 A top view of the arc separation assembly.

[0035] Figure 7 A schematic view of the arc separation assembly cooperating with the contact assembly is provided for the embodiments of the present application. Figure 6 A sectional view of the arc separation assembly.

[0036] Figure 8 A first view of the arc separation assembly is provided for the embodiments of the present application.

[0037] Figure 9 A second view of the arc separation assembly is provided for the embodiments of the present application.

[0038] Legend of reference signs:

[0039] 100, circuit breaker; 101, housing; 1, contact assembly; 11, movable contact; 12, static contact; 2, arc extinguishing assembly; 3, arc separation assembly; 31, arc separation space; 311, accommodating cavity; 312, arc leading cavity; 313, arc running cavity; 32, first partition plate; 321, first side wall; 322, first guide part; 323, second side wall; 324, third guide part; 325, third side wall; 326, first arc running path; 327, first limiting part; 328, first mounting cavity; 33, support part; 331, main body section; 332, first pre-bending section; 333, second pre-bending section; 34, second partition plate; 341, fourth side wall; 342, second guide part; 343, fifth side wall; 344, fourth guide part; 345, sixth side wall; 346, second arc running path; 347, second limiting part; 348, second mounting cavity; 35, baffle; 36, first magnet; 37, second magnet. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0042] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0043] In the description of the present application, it should be noted that the terms "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside 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.

[0045] When the circuit breaker is disconnected, the contact assembly in the circuit breaker is prone to produce arc. In order to reduce the damage of the arc to the components in the circuit breaker, the existing circuit breaker is usually provided with an arc separation assembly for blocking the arc from the components in the circuit breaker.

[0046] The existing arc separation assembly is usually composed of two parallel arranged arc separation plates, but such arc separation plates have weak guiding ability for the arc, and are prone to have problems such as slow moving speed of the arc when passing through the arc separation assembly or stagnation of the arc in the arc separation assembly, which affects the arc extinguishing effect of the circuit breaker.

[0047] Based on this, the embodiments of the present application provide an arc separation assembly and a circuit breaker, which can improve the arc separation and arc guiding effects and reduce the risk of damage caused by the arc.

[0048] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0049] Figure 1 The internal structure of the circuit breaker 100 provided in the embodiments of the present application is shown in the schematic view, the present application provides a circuit breaker 100, which comprises a contact assembly 1, an arc extinguishing assembly 2 and an arc separation assembly 3 as shown in Figure 1 The arc separation assembly 3 cooperates with the contact assembly 1 and the arc extinguishing assembly 2. Figure 1The circuit breaker 100 further comprises a housing 101, and the contact assembly 1, the arc extinguishing assembly 2 and the arc separation assembly 3 are all mounted in the housing 101.

[0050] Figure 2 The contact assembly 1, the arc extinguishing assembly 2 and the arc separation assembly 3 provided by the embodiment of the present application are matched with each other, and a structural schematic diagram is shown in FIG. 1. The contact assembly 1, the arc extinguishing assembly 2 and the arc separation assembly 3 are combined with each other. Figure 1 and Figure 2 In the embodiment, the contact assembly 1 comprises a movable contact 11 and a fixed contact 12, the arc extinguishing assembly 2 comprises an arc extinguishing chamber, and the arc separation assembly 3 is provided with an arc separation space 31, and the part of the movable contact 11 and the fixed contact 12 that are in contact with each other is located in the arc separation space 31, and the arc extinguishing chamber is located at the opening of the arc separation space 31.

[0051] When the movable contact 11 and the fixed contact 12 are separated, the arc generated between the movable contact 11 and the fixed contact 12 is all limited in the arc separation space 31, and the arc can be quickly moved into the arc extinguishing chamber under the action of the structure in the arc separation space 31. The specific structure of the arc separation assembly 3 will be described in detail hereinafter, which is not described here.

[0052] The arc separation assembly 3 provided by the embodiment can simultaneously play the roles of blocking the arc and guiding the arc, which not only can reduce the possibility of arc diffusion, but also can accelerate the speed of the arc entering the arc extinguishing assembly 2, improve the arc extinguishing efficiency of the circuit breaker 100, and thus reduce the negative influence of the arc on the safety of each component in the circuit breaker 100.

[0053] Please refer to Figures 1 to 4 The embodiment provides an arc separation assembly 3, which comprises a first partition plate 32, a support part 33 and a second partition plate 34 which are integrally arranged, the first partition plate 32 and the second partition plate 34 are oppositely arranged on the two sides of the support part 33, and the first partition plate 32, the support part 33 and the second partition plate 34 enclose an accommodating cavity 311, an arc leading cavity 312 and an arc running cavity 313 which are connected with each other.

[0054] In combination with Figure 7 The accommodating cavity 311 is located on the side of the arc leading cavity 312 close to the support part 33, the arc running cavity 313 is located on the side of the arc leading cavity 312 away from the support part 33, and the arc running cavity 313 is connected with the arc extinguishing assembly 2. The contact assembly 1 comprises the movable contact 11, and part of the movable contact 11 is located in the accommodating cavity 311 after the contact assembly 1 is disconnected.

[0055] In the accommodating cavity 311, the distance between the first partition plate 32 and the second partition plate 34 is a first distance, in the arc leading cavity 312, the distance between the first partition plate 32 and the second partition plate 34 is a second distance, and in the arc running cavity 313, the distance between the first partition plate 32 and the second partition plate 34 is a third distance, the first distance is smaller than the second distance, and the second distance is smaller than the third distance.

[0056] Please refer toFigure 2 And Figure 4 The first partition plate 32, the second partition plate 34 and the support part 33 are integrally arranged, so that the arc separation assembly 3 has a stable structure, and the first partition plate 32 and the second partition plate 34 can be accurately matched to play a stable arc separation role. Meanwhile, the region enclosed by the first partition plate 32, the second partition plate 34 and the support part 33 is divided into the accommodating cavity 311, the arc leading cavity 312 and the arc running cavity 313 from small to large according to the space, so that the arc can be moved from the accommodating cavity 311 to the arc running cavity 313 through the arc leading cavity 312 along the airflow, which is beneficial to quickly leading the arc out of the arc separation assembly 3 into the arc extinguishing assembly 2, effectively improving the arc separation and arc extinguishing effects, and reducing the possibility of arc diffusion.

[0057] Referring to Figures 2 to 4 The first partition plate 32 and the second partition plate 34 are oppositely arranged at two sides of the support part 33, and the first partition plate 32 and the second partition plate 34 are parallel to each other. The first partition plate 32, the second partition plate 34 and the support part 33 form the arc separation space 31 by enclosing three sides. The arc separation space 31 can be divided into the accommodating cavity 311, the arc leading cavity 312 and the arc running cavity 313.

[0058] The accommodating cavity 311 is located at a position close to the support part 33 in the arc separation space 31, that is, the deepest position of the arc separation space 31. The accommodating cavity 311 is used for accommodating the movable contact 11. When the movable contact 11 is disconnected from the static contact 12, the movable contact 11 will rotate into the accommodating cavity 311, while the static contact 12 is always located on the side of the first partition plate 32 away from the support part 33. At this time, part of the arc is in the accommodating cavity 311.

[0059] The arc leading cavity 312 is located between the accommodating cavity 311 and the arc running cavity 313, and is used for connecting the accommodating cavity 311 and the arc running cavity 313. The arc leading cavity 312 can guide the arc in the accommodating cavity 311, so that the arc can quickly move out of the accommodating cavity 311 and move to a position close to the arc running cavity 313.

[0060] The arc running cavity 313 is located at a position away from the support part 33 in the arc separation space 31, that is, the side of the arc separation assembly 3 close to the arc extinguishing assembly 2. The arc running cavity 313 is used for guiding the arc to quickly move into the arc extinguishing assembly 2, effectively improving the arc leading effect of the arc separation assembly 3. The arc leading effect and the arc separation effect are matched to effectively reduce the possibility of damage caused by arc diffusion.

[0061] Specifically, the first distance is smaller than the second distance, and the second distance is smaller than the third distance, which makes the space of the accommodating cavity 311, the arc leading cavity 312 and the arc running cavity 313 present a stepped increasing feature. In this way, when the contact assembly 1 is disconnected, the high-temperature gas around will flow from the side with small space to the side with large space, so that the arc can be moved from the accommodating cavity 311 to the arc running cavity 313 through the airflow.

[0062] The arc striking effect of the arc separation assembly 3 is effectively improved by the arrangement, the possibility of arc staying in the arc separation assembly 3 is reduced, the arc separation assembly 3 is prevented from being damaged and the arc separation effect is affected due to arc staying, and the structure is simple and convenient for manufacturing.

[0063] With reference to Figure 3 and Figure 4 In some examples, the first partition plate 32 includes a first side wall 321 and a second side wall 323 connected with each other, the second partition plate 34 includes a fourth side wall 341 and a fifth side wall 343 connected with each other, the first side wall 321 cooperates with the fourth side wall 341 to form the accommodating cavity 311, and the second side wall 323 cooperates with the fifth side wall 343 to form the arc striking cavity 312. The first guiding part 322 is arranged on the first partition plate 32 and connects the first side wall 321 and the second side wall 323. The second guiding part 342 is arranged on the second partition plate 34 and connects the fourth side wall 341 and the fifth side wall 343.

[0064] By arranging the first guiding part 322 between the first side wall 321 and the second side wall 323 and arranging the second guiding part 342 between the fourth side wall 341 and the fifth side wall 343, a smooth transition is formed between the accommodating cavity 311 and the arc striking cavity 312, which is beneficial to the smooth flow of the high-temperature gas flow in the arc separation space 31, so as to drive the arc to move from the accommodating cavity 311 to the arc striking cavity 312, reduce the possibility of the arc staying in the accommodating cavity 311 or between the accommodating cavity 311 and the arc striking cavity 312, and improve the arc striking effect.

[0065] The first side wall 321 and the second side wall 323 are located on the side of the first partition plate 32 close to the second partition plate 34, and the fourth side wall 341 and the fifth side wall 343 are located on the side of the second partition plate 34 close to the first partition plate 32. The first side wall 321, the fourth side wall 341 and the support part 33 jointly enclose the accommodating cavity 311, and the fourth side wall 341 and the fifth side wall 343 jointly enclose the arc striking cavity 312.

[0066] It should be noted that the first guiding part 322 and the second guiding part 342 can be arranged as inclined surfaces or curved surfaces. Whether it is an inclined surface or a curved surface, a smooth transition can be formed between the first side wall 321 and the second side wall 323 and between the fourth side wall 341 and the fifth side wall 343, so as to realize the smooth transition between the cavity walls of the accommodating cavity 311 and the arc striking cavity 312, which is beneficial to the flow of the high-temperature gas from the accommodating cavity 311 to the arc striking cavity 312, so as to drive the arc to move.

[0067] With reference to Figure 3 and Figure 4In some examples, the first partition plate 32 further comprises a third side wall 325, and the second partition plate 34 further comprises a sixth side wall 345, the third side wall 325 and the sixth side wall 345 cooperatively forming the running arc cavity 313. The first partition plate 32 is provided with a third guide portion 324 connecting the second side wall 323 and the third side wall 325, and / or the second partition plate 34 is provided with a fourth guide portion 344 connecting the fifth side wall 343 and the sixth side wall 345.

[0068] By arranging the third guide portion 324 between the second side wall 323 and the third side wall 325 and the fourth guide portion 344 between the fifth side wall 343 and the sixth side wall 345, a smooth transition is formed between the leading arc cavity 312 and the running arc cavity 313, which is conducive to the smooth flow of high-temperature gas in the arc separation space 31, so as to drive the arc to move smoothly from the leading arc cavity 312 to the running arc cavity 313, reduce the possibility of the arc staying in the leading arc cavity 312 or between the leading arc cavity 312 and the running arc cavity 313, and improve the leading arc effect.

[0069] The third side wall 325 is arranged on the side of the first partition plate 32 close to the second partition plate 34, and the sixth side wall 345 is arranged on the side of the second partition plate 34 close to the first partition plate 32. The space between the third side wall 325 and the sixth side wall 345 is the running arc cavity 313. As in the foregoing examples, the third guide portion 324 and the fourth guide portion 344 can also be arranged as inclined surfaces or arc surfaces to form a smooth transition between the second side wall 323 and the third side wall 325 and between the fifth side wall 343 and the sixth side wall 345, thereby achieving a smooth transition between the leading arc cavity 312 and the running arc cavity 313, and having the same technical effects as the foregoing examples, which will not be described here again.

[0070] In some examples, the first distance gradually increases from the side of the containing cavity 311 close to the support portion 33 to the side far away from the support portion 33. The second distance gradually increases from the side of the leading arc cavity 312 close to the containing cavity 311 to the side far away from the containing cavity 311. The third distance gradually increases from the side of the running arc cavity 313 close to the leading arc cavity 312 to the side far away from the leading arc cavity 312.

[0071] The gradually increasing first distance in the containing cavity 311 forms a cavity with gradually increasing space from the side close to the support portion 33 to the side close to the leading arc cavity 312, which is conducive to the movement of the arc in the containing cavity 311 to the side close to the leading arc cavity 312 and finally into the leading arc cavity 312, and can further improve the arc separation and leading arc effects. The leading arc cavity 312 and the running arc cavity 313 are arranged in this form and have the same technical effects, which will not be described here again.

[0072] Specifically, the first spacing in the accommodation cavity 311 gradually increases, which can be manifested as that the first side wall 321 is arranged at an obtuse angle with the plane where the support portion 33 is located, and the fourth side wall 341 can also be arranged at an obtuse angle with the plane where the support portion 33 is located, so that the accommodation cavity 311 forms a structure similar to a horn mouth, that is, the first spacing of the accommodation cavity 311 is smaller near the side of the support portion 33, and gradually increases in the direction away from the support portion 33. This is conducive to the movement of the gas flow and the arc to the side away from the support portion 33 to quickly enter the arc striking cavity 312.

[0073] The arc striking cavity 312 and the arc running cavity 313 are the same as the accommodation cavity 311, and the second spacing and the third spacing gradually increase in the direction away from the support portion 33, which is conducive to the movement of the gas flow and the arc to the direction where the arc extinguishing assembly 2 is located, effectively improving the arc separation and arc striking effects of the arc separation assembly 3, thereby facilitating the improvement of the breaking effect and the arc extinguishing effect of the circuit breaker 100.

[0074] Referring to Figures 2 to 4 In some examples, at least one first arc running channel 326 is arranged on the third side wall 325, the first arc running channel 326 is arranged in an arc shape, a first end of the first arc running channel 326 is connected to the third guide portion 324, and a second end of the first arc running channel 326 is communicated with the arc extinguishing assembly 2. And / or, at least one second arc running channel 346 is arranged on the sixth side wall 345, the second arc running channel 346 is arranged in an arc shape, a first end of the second arc running channel 346 is connected to the fourth guide portion 344, and a second end of the second arc running channel 346 is communicated with the arc extinguishing assembly 2.

[0075] The arrangement of the first arc running channel 326 and the second arc running channel 346 can form an accurate guide path in the arc running cavity 313, so that after the arc enters the arc running cavity 313 from the arc striking cavity 312, the arc can accurately and quickly move to the side of the arc running cavity 313 away from the arc striking cavity 312 along the guide path, and smoothly enter the arc extinguishing assembly 2, thereby effectively improving the arc striking effect of the arc separation assembly 3.

[0076] Specifically, the first arc running channel 326 is formed by a plurality of bosses arranged at intervals on the third side wall 325, the plurality of bosses are arranged in an arc shape on the third side wall 325, and the extension direction of the arc shape extends from the side close to the arc striking cavity 312 to the side close to the arc extinguishing assembly 2. The second arc running channel 346 is arranged in the same manner, and the second arc running channel 346 cooperates with the first arc running channel 326 to accurately move the arc to the position where the arc extinguishing assembly 2 is located, thereby facilitating the improvement of the arc extinguishing effect.

[0077] Referring to Figures 5 to 9In some examples, a first limiting part 327 is provided on the side of the first partition 32 away from the support part 33, and a second limiting part 347 is provided on the side of the second partition 34 away from the support part 33. The first limiting part 327 and the second limiting part 347 form an assembly groove, which communicates with the arc-starting cavity 312 and the arc-running cavity 313. The contact assembly 1 includes a stationary contact 12, which is at least partially located within the assembly groove.

[0078] The assembly groove formed by the first limiting part 327 and the second limiting part 347 serves to fix the stationary contact 12, which can improve the stability of the fit between the stationary contact 12 and the arc blocking assembly 3, reduce the possibility of arc spreading from the stationary contact 12, and improve the arc blocking effect of the arc blocking assembly 3.

[0079] Among them, reference Figures 7 to 9 A first limiting part 327 is disposed on the side wall of the first partition 32 away from the support part 33. The first limiting part 327 is configured as a limiting groove, and the shape of the limiting groove matches the shape of the stationary contact 12. A second limiting part 347 is disposed on the side wall of the second partition 34 away from the support part 33. The second limiting part 347 is also configured as a limiting groove, and the shape of the limiting groove matches the shape of the stationary contact 12.

[0080] Reference Figures 5 to 9 The first limiting part 327 and the second limiting part 347 are positioned opposite each other and form a complete assembly groove. The first side of the stationary contact 12 is assembled in the first limiting part 327, and the second side is assembled in the second limiting part 347. The stationary contact 12 is usually provided with a stationary contact point, which is located exactly in the arc-blocking space 31. This not only allows for the positioning and installation of the stationary contact 12, but also prevents the arc on the stationary contact point from spreading in the arc-blocking space 31.

[0081] Reference Figure 8 and Figure 9 In some examples, a baffle 35 is provided on the side of the first partition 32 away from the support 33, and the baffle 35 abuts against the second partition 34.

[0082] The baffle 35 provided on the first partition 32 abuts against the second partition 34, which, together with the support part 33, provides support on the side of the first partition 32 and the second partition 34 away from the support part 33, ensuring that the first partition 32 and the second partition 34 are kept apart, so as to provide stable arc blocking and arc initiation functions.

[0083] Specifically, the baffle 35 is arranged on the side wall of the first partition plate 32 away from the support part 33 and abuts against the second partition plate 34, which is equivalent to that the baffle 35 and the support part 33 are supported between the first partition plate 32 and the second partition plate 34, and also plays a role of improving the structural stability of the arc separation assembly 3. At the same time, the baffle 35 can be used to block the diffusion of the electric arc from the position of the assembly groove out of the arc separation space 31, improve the arc separation effect of the arc separation assembly 3, so that the electric arc can all move to the arc extinguishing assembly 2 along the arc running cavity 313.

[0084] With reference to Figure 8 and Figure 9 In some examples, the side of the first partition plate 32 away from the second partition plate 34 is provided with a first mounting cavity 328, the first mounting cavity 328 is provided with a first magnet 36, the side of the second partition plate 34 away from the first partition plate 32 is provided with a second mounting cavity 348, the second mounting cavity 348 is provided with a second magnet 37, and the first magnet 36 and the second magnet 37 generate a magnetic field between the first partition plate 32 and the second partition plate 34, which can guide the electric arc to the arc extinguishing assembly 2.

[0085] By arranging the first magnet 36 on the first partition plate 32 and the second magnet 37 on the second partition plate 34, and using the magnetic field formed between the first partition plate 32 and the second partition plate 34 by the first magnet 36 and the second magnet 37 to play a magnetic blow effect on the electric arc, it is beneficial to quickly move the electric arc from the arc separation assembly 3 to the arc extinguishing assembly 2, and improve the arc separation and arc guiding effects of the arc separation assembly 3.

[0086] In addition, the side wall of the first mounting cavity 328 is provided with a first limiting boss, which can play a role of limiting installation of the first magnet 36 and avoid loosening of the first magnet 36. Similarly, the side wall of the second mounting cavity 348 is provided with a second limiting boss, which can play a role of limiting installation of the second magnet 37 and avoid loosening of the second magnet 37. Thus, the first magnet 36 and the second magnet 37 can provide stable magnetic blow effect.

[0087] With reference to Figure 3 and Figure 4 In some examples, the support part 33 includes a main body section 331, a first pre-bent section 332 and a second pre-bent section 333, the first pre-bent section 332 and the second pre-bent section 333 are arranged on opposite sides of the main body section 331, the first partition plate 32 is connected with the first pre-bent section 332, and the second partition plate 34 is connected with the second pre-bent section 333.

[0088] The main body segment 331 of the support part 33 is used to support, and the first pre-bending segment 332 and the second pre-bending segment 333 are arranged to realize the soft connection between the first partition plate 32 and the main body segment 331 and between the second partition plate 34 and the main body segment 331, which facilitates the integrated molding of the arc separation assembly 3 without affecting the supporting effect of the support part 33.

[0089] Specifically, the arc separation assembly 3 provided by the present application has a manufacturing state and a molded state. Referring to Figure 3 In the manufacturing state, the first partition plate 32, the support part 33 and the second partition plate 34 are arranged in a plane, which facilitates the integrated injection molding of the arc separation assembly 3 and is beneficial to simplify the manufacturing process. The first pre-bending segment 332 and the second pre-bending segment 333 can be bent relative to the main body segment 331 to change from the manufacturing state to the molded state. Referring to Figure 4 In the molded state, the support part 33 can provide stable support to keep the first partition plate 32 and the second partition plate 34 apart.

[0090] The first pre-bending segment 332 is connected between the first partition plate 32 and the main body segment 331, and the first pre-bending segment 332 is bent relative to the main body segment 331 to arrange the first partition plate 32 and the main body segment 331 at an angle. The second pre-bending segment 333 is connected between the second partition plate 34 and the main body segment 331, and the second pre-bending segment 333 is bent relative to the main body segment 331 to arrange the second partition plate 34 and the main body segment 331 at an angle, so as to form the accommodating cavity 311, the arc leading cavity 312 and the arc running cavity 313 in the arc separation assembly 3. Therefore, this arrangement has the characteristics of simple structure, easy manufacturing, strong arc separation and arc leading ability.

[0091] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An arc chute assembly, characterized by, The arc separation assembly is arranged in cooperation with the contact assembly and the arc extinguishing assembly, and comprises a first partition plate, a support part and a second partition plate arranged integrally, the first partition plate and the second partition plate are oppositely arranged on two sides of the support part, and the first partition plate, the support part and the second partition plate enclose an accommodating cavity, an arc striking cavity and an arc running cavity which are connected in series; The accommodating cavity is located on one side of the arc striking cavity close to the support part, the arc running cavity is located on the other side of the arc striking cavity away from the support part, and the arc running cavity is in communication with the arc extinguishing assembly; The contact assembly comprises a movable contact, and part of the movable contact is located in the accommodating cavity after the contact assembly is disconnected. In the accommodating cavity, the distance between the first partition plate and the second partition plate is a first interval, in the arc striking cavity, the distance between the first partition plate and the second partition plate is a second interval, and in the arc running cavity, the distance between the first partition plate and the second partition plate is a third interval, the first interval is smaller than the second interval, and the second interval is smaller than the third interval.

2. The arc chute assembly of claim 1, wherein, The first partition plate comprises a first side wall and a second side wall connected in series, the second partition plate comprises a fourth side wall and a fifth side wall connected in series, the first side wall and the fourth side wall cooperate to form the accommodating cavity, and the second side wall and the fifth side wall cooperate to form the arc striking cavity; The first partition plate is provided with a first guide part connected with the first side wall and the second side wall, and / or the second partition plate is provided with a second guide part connected with the fourth side wall and the fifth side wall.

3. The arc separation assembly of claim 2, wherein, The first partition plate further comprises a third side wall, and the second partition plate further comprises a sixth side wall, the third side wall and the sixth side wall cooperate to form the arc running cavity; The first partition plate is provided with a third guide part connected with the second side wall and the third side wall, and / or the second partition plate is provided with a fourth guide part connected with the fifth side wall and the sixth side wall.

4. The arc isolation assembly of claim 1, wherein, The first interval gradually increases from the side of the accommodating cavity close to the support part to the side away from the support part; And / or, the second interval gradually increases from the side of the arc striking cavity close to the accommodating cavity to the side away from the accommodating cavity; And / or, the third interval gradually increases from the side of the arc running cavity close to the arc striking cavity to the side away from the arc striking cavity.

5. The arc isolation assembly of claim 3, wherein, The third side wall is provided with at least one first arc running channel, the first arc running channel is arranged in an arc shape, a first end of the first arc running channel is connected with the third guide part, and a second end of the first arc running channel is in communication with the arc extinguishing assembly; And / or, the sixth side wall is provided with at least one second arc running channel, the second arc running channel is arranged in an arc shape, a first end of the second arc running channel is connected with the fourth guide part, and a second end of the second arc running channel is in communication with the arc extinguishing assembly.

6. The arc management assembly of claim 1, wherein, The first partition plate is provided with a first limiting part on the side away from the support part, the second partition plate is provided with a second limiting part on the side away from the support part, the first limiting part and the second limiting part form an assembly groove, and the assembly groove is communicated with the arc striking cavity and the arc running cavity. The contact assembly comprises a static contact, and the static contact is at least partially in the assembly groove.

7. An arc chute assembly according to any one of claims 1-6, characterized in that The first partition plate is provided with a baffle on the side away from the support part, and the baffle abuts against the second partition plate.

8. An arc chute assembly according to any one of claims 1-6, wherein, The first partition plate is provided with a first mounting cavity on the side away from the second partition plate, the first mounting cavity is provided with a first magnet, the second partition plate is provided with a second mounting cavity on the side away from the first partition plate, the second mounting cavity is provided with a second magnet, the first magnet and the second magnet generate a magnetic field between the first partition plate and the second partition plate, and the magnetic field can guide the arc to the arc extinguishing assembly.

9. An arc chute assembly according to any one of claims 1-6, wherein, The support part comprises a main body segment, a first pre-bending segment and a second pre-bending segment, the first pre-bending segment and the second pre-bending segment are arranged on the opposite sides of the main body segment, the first partition plate is connected with the first pre-bending segment, and the second partition plate is connected with the second pre-bending segment.

10. A circuit breaker characterized by, The contact assembly, the arc extinguishing assembly and the arc separating assembly according to any one of claims 1-9 are comprised, and the arc separating assembly cooperates with the contact assembly and the arc extinguishing assembly.

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