Arc extinguish chamber and circuit breaker

Abstract

The utility model provides an arc extinguish chamber and a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the arc extinguish chamber comprises at least two arc extinguish assemblies which are sequentially arranged along a first direction, the at least two arc extinguish assemblies are arranged along a step shape along the first direction, and when a moving contact is in an opening position, the moving contact is separated from the arc extinguish assemblies. The distance between the arc extinguishing assembly and the moving contact in the second direction is gradually reduced, the first direction is the connecting direction of the wire outlet terminal and the wire inlet terminal of the circuit breaker, and the first direction is perpendicular to the second direction. According to the arc extinguish chamber and the circuit breaker provided by the invention, the problems of relatively low arc extinguish speed of the arc extinguish chamber and relatively low breaking capacity of the circuit breaker in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to an arc-extinguishing chamber and a circuit breaker. BACKGROUND

[0002] A circuit breaker is a switching device capable of making, carrying and breaking currents under normal circuit conditions and of making, carrying and breaking currents under abnormal circuit conditions within specified times. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their use. A low-voltage circuit breaker, also known as an automatic switch or air switch, is an electrical apparatus that has both manual switching functions and automatic protection functions for loss of voltage, under-voltage, overload and short-circuit. It can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. A low-voltage circuit breaker generally consists of an operating mechanism, a contact system, an electromagnetic system, and an arc-extinguishing system.

[0003] An arc-extinguishing chamber is a core component of the arc-extinguishing system of a low-voltage circuit breaker, generally composed of multiple arc-extinguishing vanes and fixed side plates, and is mainly used to limit the position of the arc space and accelerate the extinction of the arc. In the prior art, multiple arc-extinguishing vanes are arranged in parallel and at the same height, which makes the speed of the arc entering the arc-extinguishing chamber low, reduces the arc-extinguishing speed of the arc-extinguishing chamber, and thus reduces the breaking capacity of the circuit breaker. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to solve the problems of low arc-extinguishing speed of the arc-extinguishing chamber and low breaking capacity of the circuit breaker in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In one aspect of the embodiments of the present application, an arc-extinguishing chamber is provided, which includes at least two arc-extinguishing assemblies arranged in sequence along a first direction. Along the first direction, the at least two arc-extinguishing assemblies are arranged in a stepped manner, and when the moving contact is in an open position, the distance between the arc-extinguishing assemblies and the moving contact in a second direction gradually decreases. The first direction is the direction of the connection between the outgoing terminal and the incoming terminal of the circuit breaker, and the first direction is perpendicular to the second direction.

[0007] As an implementable manner, along the second direction, the sides of the at least two arc-extinguishing assemblies away from the moving contact are arranged in a stepped manner.

[0008] As an implementable manner, the arc-extinguishing chamber further includes a base, and the at least two arc-extinguishing assemblies are arranged in the base. In the base, corresponding to the sides of the multiple arc-extinguishing assemblies away from the moving contact, air channels are formed respectively.

[0009] As an implementable manner, the side wall of the base corresponding to the arc extinguishing assembly is stepped, and a partition plate is arranged in the base corresponding to the arc extinguishing assembly, and the air channel is formed between the side wall of the base and the partition plate or between the partition plates.

[0010] As an implementable manner, along the first direction, one side of the last arc extinguishing assembly is used for arranging the stationary contact.

[0011] As an implementable manner, the arc extinguishing assembly includes two, along the first direction, the two arc extinguishing assemblies are respectively a first arc extinguishing assembly and a second arc extinguishing assembly, the first arc extinguishing assembly includes a plurality of first arc extinguishing pieces arranged in sequence along the first direction, the plurality of first arc extinguishing pieces are arranged in parallel, and the end surface of the plurality of first arc extinguishing pieces is located on the first surface, and the first surface is parallel to the first direction.

[0012] As an implementable manner, the arc extinguishing assembly includes two, along the first direction, the two arc extinguishing assemblies are respectively a first arc extinguishing assembly and a second arc extinguishing assembly, the first arc extinguishing assembly includes a plurality of second arc extinguishing pieces arranged in sequence along the first direction, the plurality of second arc extinguishing pieces are arranged in parallel, along the first direction, the end surface of the plurality of second arc extinguishing pieces is located on the second surface, and the angle between the second surface and the first direction is less than 90°.

[0013] As an implementable manner, the inclination angle of the second surface is used to match the inclination angle of the arc striking plate.

[0014] As an implementable manner, the second arc extinguishing assembly includes a plurality of third arc extinguishing pieces arranged in sequence along the first direction, and the plurality of third arc extinguishing pieces are arranged in parallel and at the same height.

[0015] As an implementable manner, the arc extinguishing assembly includes a plurality of arc extinguishing pieces arranged in sequence along the first direction, and the structures of the plurality of arc extinguishing pieces in each arc extinguishing assembly are the same.

[0016] As an implementable manner, the structures of the arc extinguishing pieces in the plurality of arc extinguishing assemblies are the same.

[0017] An aspect of the embodiment of the present application provides a circuit breaker, which includes a shell, an operating mechanism, a stationary contact and an arc extinguishing chamber arranged in the shell, a movable contact is arranged on the operating mechanism, the operating mechanism is driven to rotate to drive the movable contact to contact or separate from the stationary contact, and the arc extinguishing chamber is arranged on one side of a movement path of the movable contact.

[0018] The beneficial effects of the present application include:

[0019] The application provides an arc-extinguishing chamber, which comprises at least two arc-extinguishing assemblies arranged in sequence along a first direction, the at least two arc-extinguishing assemblies are arranged in a stepped manner along the first direction, and the distance between the arc-extinguishing assemblies and a moving contact in a second direction gradually decreases when the moving contact is in an open position, wherein the first direction is the connecting direction of an outgoing terminal and an incoming terminal of a circuit breaker. When the circuit breaker is opened, the moving contact is separated from a stationary contact and moves away from the stationary contact, at this time, an arc is generated between the moving contact and the stationary contact, the arc-extinguishing chamber is arranged as a plurality of arc-extinguishing assemblies arranged in sequence along the first direction in the application, the plurality of arc-extinguishing assemblies are arranged in a stepped manner, so that on the basis of fully utilizing the space, part of the arc-extinguishing assemblies are closer to the position where the arc is generated and the trajectory of the arc, so that the arc can enter the corresponding arc-extinguishing assembly more quickly, the arc is extinguished by the arc-extinguishing assembly, thereby improving the breaking capacity of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the 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 of the embodiments of the 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 on the basis of these drawings.

[0021] Figure 1 One of the structural schematic diagrams of the arc-extinguishing chamber provided by the embodiments of the application;

[0022] Figure 2 The second structural schematic diagram of the arc-extinguishing chamber provided by the embodiments of the application;

[0023] Figure 3 One of the structural schematic diagrams of the arc-extinguishing assembly provided by the embodiments of the application;

[0024] Figure 4 The second structural schematic diagram of the arc-extinguishing assembly provided by the embodiments of the application;

[0025] Figure 5 The third structural schematic diagram of the arc-extinguishing assembly provided by the embodiments of the application;

[0026] Figure 6 The fourth structural schematic diagram of the arc-extinguishing assembly provided by the embodiments of the application.

[0027] Legend: 100-arc-extinguishing chamber; 110-arc-extinguishing assembly; 111-first arc-extinguishing assembly; 112-second arc-extinguishing assembly; 120-base; 131-first arc-extinguishing sheet; 132-first surface; 141-second arc-extinguishing sheet; 142-second surface; 151-third arc-extinguishing sheet; 161-air channel; 210-moving contact; 220-stationary contact; 230-arc striking plate. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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.

[0029] 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 present application, but only represents selected embodiments of the present application. It should be noted that, in the case of no conflict, various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the protection scope of the present application.

[0030] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication 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.

[0032] When the circuit breaker is tripped, the moving contact and the static contact are separated, and an arc is generated between the moving contact and the static contact. The arc is a high-temperature charged gas, which can cause damage to other components of the circuit breaker. In the circuit breaker, the arc extinguishing chamber is used to extinguish the arc. In the prior art, the arc extinguishing efficiency of the arc extinguishing chamber is low.

[0033] An aspect of an embodiment of the present application, as shown in Figure 1 and Figure 2 provides an arc extinguishing chamber 100, which includes at least two arc extinguishing assemblies 110 arranged in sequence along a first direction. Along the first direction, the at least two arc extinguishing assemblies 110 are arranged in a stepped manner, and when the moving contact is in a tripped position, the distance between the arc extinguishing assembly 110 and the moving contact 210 in a second direction gradually decreases, wherein the first direction is the connection direction of the outgoing terminal and the incoming terminal of the circuit breaker, and the first direction is perpendicular to the second direction.

[0034] The arc-extinguishing chamber 100 provided in this embodiment is applied in a low-voltage molded case circuit breaker to extinguish the arc generated when the circuit breaker is opened. Specifically, when the circuit breaker is opened, the moving contact 210 of the circuit breaker separates from the stationary contact 220 and moves away from the stationary contact 220. The arc-extinguishing chamber 100 provided in this embodiment includes at least two arc-extinguishing components 110. Along a first direction, i.e., the connection direction between the outgoing and incoming terminals of the circuit breaker; that is, the direction in which the moving contact 210 moves away from the stationary contact 220, the at least two arc-extinguishing components 110 are arranged in a stepped manner. Figure 1 In this circuit breaker, two arc-extinguishing components 110 are arranged horizontally and staggered vertically. Specifically, the distance between the arc-extinguishing components 110 and the moving contact 210 gradually decreases in the second direction. In this way, while making full use of the space below the contact system (the collective name for the moving contact 210 and the stationary contact 220), some of the arc-extinguishing components 110 are brought closer to the contact system. Thus, when an arc is generated, it will enter the closer arc-extinguishing component 110 for arc extinguishing more quickly, thereby improving the breaking capacity of the circuit breaker.

[0035] The specific number of arc-extinguishing components 110 is not limited in this application, and those skilled in the art can make specific settings according to the actual situation. In the same space, the more arc-extinguishing components 110 there are, the more significant the improvement in the arc-extinguishing rate. At the same time, the more arc-extinguishing components 110 there are, the more difficult the assembly is when assembling the arc-extinguishing chamber 100. Those skilled in the art can make a compromise between the arc-extinguishing rate and the assembly difficulty.

[0036] It should be noted that when the circuit breaker trips, the moving contact 210 rotates and separates from the stationary contact 220. Thus, the movement trajectory of the moving contact 210 is arc-shaped. In this embodiment, the first direction is the direction in which the moving contact 210 moves away from the stationary contact 220, i.e. Figure 1 The direction to the left in the middle horizontal direction.

[0037] The application provides an arc extinguishing chamber 100 comprising at least two arc extinguishing assemblies 110 arranged in sequence along a first direction, wherein the at least two arc extinguishing assemblies 110 are arranged in a stepped manner along the first direction, and the distance between the arc extinguishing assemblies 110 and a moving contact 210 gradually decreases along the first direction, wherein the first direction is the connecting direction of an outgoing terminal and an incoming terminal of a circuit breaker. When the circuit breaker is tripped, the moving contact 210 is separated from a stationary contact 220 and moves away from the stationary contact 220, at this time, an arc is generated between the moving contact 210 and the stationary contact 220, and the arc extinguishing chamber 100 is arranged as a plurality of arc extinguishing assemblies 110 arranged in sequence along the first direction in the embodiment of the application, the plurality of arc extinguishing assemblies 110 are arranged in a stepped manner, so that on the basis of fully utilizing the space, part of the arc extinguishing assemblies 110 are closer to the position where the arc is generated and the trajectory of the arc, so that the arc can enter the corresponding arc extinguishing assembly 110 more quickly, the arc is extinguished by the arc extinguishing assembly 110, thereby improving the breaking capacity of the circuit breaker.

[0038] As an implementable mode, as shown in Figure 1 and Figure 2 , along the first direction, one side of the last arc extinguishing assembly 110 is used for arranging the stationary contact 220.

[0039] As known from the above, along the first direction, the distance between the arc extinguishing assemblies 110 and the moving contact 210 gradually decreases, so that the distance between the last arc extinguishing assembly 110 and the moving contact 210 is the closest, and one side of the last arc extinguishing assembly 110 is arranged as the stationary contact 220 in the embodiment of the application, that is, the stationary contact 220 is located on one side of the closest arc extinguishing assembly 110, and the arc generated when the moving contact 210 is separated from the stationary contact 220 enters the last arc extinguishing assembly 110 at the closest distance, so that the arc can enter the arc extinguishing assembly 110 in time for extinguishing, thereby improving the arc extinguishing efficiency and the breaking capacity of the circuit breaker.

[0040] In actual application, one side of the stationary contact 220 is connected with an arc guiding plate 230 away from the moving contact 210, which is used for guiding the arc, and the other arc extinguishing assemblies 110 are used for extinguishing the arc guided on the arc guiding plate 230, that is, the plurality of arc extinguishing assemblies 110 in the embodiment of the application are used for arc extinguishing from different directions, thereby improving the arc extinguishing effect.

[0041] Optionally, as shown in Figure 1 and Figure 2 , along a second direction, the heights of the at least two arc extinguishing assemblies 110 are the same, so that the side surfaces of the plurality of arc extinguishing assemblies 110 away from the moving contact 210 are arranged in a stepped manner.

[0042] Along the direction away from the moving contact 210, that is, along Figure 1In the vertical direction, the height of each arc-extinguishing assembly 110 is the same, and the upper surfaces of the arc-extinguishing assemblies 110 are arranged in a stepped manner, so that the lower surfaces of the arc-extinguishing assemblies 110 are also arranged in a stepped manner. The plurality of arc-extinguishing assemblies 110 are arranged in the same height, so that the arc-extinguishing assemblies 110 are arranged in order in the arc-extinguishing chamber 100.

[0043] In an implementable manner of the embodiment of the present application, as shown in Figure 1 and Figure 2 , the arc-extinguishing chamber 100 further comprises a base 120, and the at least two arc-extinguishing assemblies 110 are arranged in the base 120. In the base 120, corresponding to the sides of the plurality of arc-extinguishing assemblies 110 away from the moving contact 210, gas channels 161 are respectively formed.

[0044] After the arc is extinguished in the arc-extinguishing chamber 100, waste gas is generated. The plurality of arc-extinguishing assemblies 110 of the present application will generate gas during the arc-extinguishing process. In order to timely discharge the waste gas, the embodiment of the present application forms the gas channels 161 corresponding to the plurality of arc-extinguishing assemblies 110 in the base 120, for timely discharging the waste gas. Specifically, the plurality of arc-extinguishing assemblies 110 of the embodiment of the present application are arranged in a stepped manner, so that the bottom surfaces of the plurality of arc-extinguishing assemblies 110 are also arranged in a stepped manner. In this way, without increasing the occupied area, the corresponding gas channels 161 of the arc-extinguishing assemblies 110 can be respectively formed in the staggered parts of the bottom surfaces. Therefore, the embodiment of the present application utilizes the staggered parts to set the gas channels 161, which not only realizes the discharge of the waste gas, but also fully utilizes the space and avoids the generation of adverse conditions of the waste gas discharge.

[0045] In order to better layout the plurality of gas channels 161, the embodiment of the present application arranges the side walls of the base 120 corresponding to the arc-extinguishing assemblies 110 in a stepped manner, and sets a partition plate in the base 120 corresponding to the arc-extinguishing assemblies 110, and the gas channels 161 are formed between the side walls of the base 120 and the partition plate or between the partition plates, as shown in Figure 1 and Figure 2 .

[0046] Specifically, the side walls of the base 120 corresponding to the arc-extinguishing assemblies 110 are arranged in a stepped manner, and the plurality of gas channels 161 are arranged between the side walls and the arc-extinguishing assemblies 110. More specifically, a partition plate is arranged in the base 120 corresponding to the arc-extinguishing assemblies 110, and the arc-extinguishing assemblies 110 are arranged corresponding to the partition plate. Adjacent two partition plates divide a space to form a gas channel between the adjacent two partition plates. Arranging the side walls of the base 120 in a stepped manner and using the partition plate to isolate the gas channels can better layout the plurality of gas channels.

[0047] Optionally, as shown in Figure 1 and Figure 3As shown in FIG. 1, the arc-extinguishing assembly 110 includes two, along the first direction, the two arc-extinguishing assemblies 110 are respectively a first arc-extinguishing assembly 111 and a second arc-extinguishing assembly 112, the first arc-extinguishing assembly 111 includes a plurality of first arc-extinguishing pieces 131 arranged in sequence along the first direction, the plurality of first arc-extinguishing pieces 131 are arranged in parallel, and the end faces of the plurality of first arc-extinguishing pieces 131 are located on a first surface 132, the first surface 132 is parallel to the first direction.

[0048] When the end faces of the plurality of arc-extinguishing pieces in the first arc-extinguishing assembly 111 are located on the first surface 132, the first surface 132 is parallel to the first direction, that is, the plurality of second arc-extinguishing pieces 141 in the first arc-extinguishing assembly 111 are arranged in parallel and at the same height, so that the structures of the first arc-extinguishing assembly 111 and the second arc-extinguishing assembly 112 are the same, and thus, when the arc-extinguishing chamber 100 is assembled, the first arc-extinguishing assembly 111 and the second arc-extinguishing assembly 112 do not need to be distinguished intentionally, and the assembly of the arc-extinguishing chamber 100 is facilitated.

[0049] In an implementable manner of the embodiment of the present application, as shown in Figure 2 and Figure 4 As shown in FIG. 1, the arc-extinguishing assembly 110 includes two, along the first direction, the two arc-extinguishing assemblies 110 are respectively a first arc-extinguishing assembly 111 and a second arc-extinguishing assembly 112, the first arc-extinguishing assembly 111 includes a plurality of second arc-extinguishing pieces 141 arranged in sequence along the first direction, the plurality of second arc-extinguishing pieces 141 are arranged in parallel, along the first direction, the end faces of the plurality of second arc-extinguishing pieces 141 are located on a second surface 142, and the included angle between the second surface 142 and the first direction is less than 90°.

[0050] When the arc-extinguishing assembly 110 includes two, the plurality of second arc-extinguishing pieces 141 in the first arc-extinguishing assembly 111 are arranged in parallel and at different heights, that is, the plurality of second arc-extinguishing pieces 141 are arranged in a slope, along the first direction, the end faces of the plurality of second arc-extinguishing pieces 141 are located on the second surface 142, and the included angle between the second surface 142 and the first direction is less than 90°, so that part of the plurality of second arc-extinguishing pieces 141 are closer to the stationary contact 220, and thus the arc-extinguishing effect is improved.

[0051] In addition, the second surface 142 is arranged as an inclined surface, so that the space below the contact system can be used more fully, and the space utilization rate is improved.

[0052] Optionally, the inclination angle of the second surface 142 is matched with the inclination angle of the arc striking plate 230.

[0053] On the fixed contact 220, an arc guide plate 230 is usually arranged to guide the electric arc to the area obliquely below the fixed contact 220. In the embodiment of the application, the inclination angle of the second surface 142 is set to match the inclination angle of the arc guide plate 230. In this way, when the arc guide plate 230 guides the electric arc, the electric arc can be guided and extinguished by the second arc extinguishing sheet 141 close to the arc guide plate 230 in time when the electric arc overflows the arc guide plate 230, so that the electric arc can be extinguished in time, and the arc extinguishing effect is improved.

[0054] In an implementable manner of the embodiment of the application, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the second arc extinguishing assembly 112 includes a plurality of third arc extinguishing sheets 151 arranged in sequence along the first direction, and the plurality of third arc extinguishing sheets 151 are parallel and arranged at the same height.

[0055] The second arc extinguishing assembly 112 is close to the fixed contact 220, and the second arc extinguishing assembly 112 is arranged as the plurality of third arc extinguishing sheets 151 arranged in sequence along the first direction, and the plurality of third arc extinguishing sheets 151 are arranged at the same height, that is, in the vertical direction of the fixed contact 220, the third arc extinguishing sheets 151 occupy the same height, and the top surfaces of the plurality of third arc extinguishing sheets 151 are located on the same horizontal plane, and the bottom surfaces of the plurality of third arc extinguishing sheets 151 are located on the same horizontal plane. In this way, the plurality of third arc extinguishing sheets 151 can cut and extinguish the electric arc in time, and the arc extinguishing effect of the second arc extinguishing assembly 112 is improved. Figure 1

[0056] Optionally, as shown in Figure 5 and Figure 6 , the arc extinguishing assembly 110 includes a plurality of arc extinguishing sheets arranged in sequence along the first direction, and the plurality of arc extinguishing sheets in each arc extinguishing assembly 110 are the same in structure.

[0057] The plurality of arc extinguishing sheets are the same in structure, so that in the installation process of the arc extinguishing assembly 110, no distinction is needed, so that errors in the installation process can be avoided, and the installation efficiency and accuracy of the arc extinguishing assembly 110 are improved.

[0058] Furthermore, the arc extinguishing sheets in the plurality of arc extinguishing assemblies 110 are the same in structure, so that in the installation process of the entire arc extinguishing chamber 100, there is only one kind of arc extinguishing sheet, so that in the installation process of the arc extinguishing chamber 100, no distinction is needed, so that errors in the installation process can be avoided, and the installation efficiency and accuracy of the arc extinguishing chamber 100 are improved.

[0059] ​The application further discloses a circuit breaker, which comprises a shell, an operating mechanism arranged in the shell, a static contact 220 and the arc extinguishing chamber 100.

[0060] The above merely provides the preferred embodiments of the application, but not for limiting the application. For those skilled in the art, the application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the application shall fall into the protection scope of the application.

Claims

1. An arc quenching chamber, characterized in that, The arc extinguishing assembly (110) comprises at least two arc extinguishing assemblies arranged in sequence along a first direction, and the at least two arc extinguishing assemblies (110) are arranged in a stepped manner along the first direction, and the distance between the arc extinguishing assembly (110) and the moving contact (210) in a second direction gradually decreases when the moving contact is in an open position, wherein the first direction is the connecting direction of the outgoing terminal and the incoming terminal of the circuit breaker, and the first direction is perpendicular to the second direction.

2. The arc chute of claim 1, wherein, Along the second direction, the at least two arc extinguishing assemblies (110) are arranged in a stepped manner away from the side surface of the moving contact (210).

3. The arc chute of claim 2, wherein, Further comprising a base (120), and the at least two arc extinguishing assemblies (110) are arranged in the base (120), and the base (120) is provided with an air channel (161) corresponding to the side surface of the moving contact (210).

4. The arc chute of claim 3, wherein, The side wall of the base (120) corresponding to the arc extinguishing assembly is in a stepped manner, and the base is provided with a partition plate corresponding to the arc extinguishing assembly, and the air channel (161) is formed between the side wall of the base and the partition plate or between the partition plates.

5. The arc chute of claim 2, wherein, Along the first direction, one side of the last arc extinguishing assembly (110) is used to arrange the stationary contact (220).

6. The arc chute of claim 1, wherein, The arc extinguishing assembly (110) comprises two arc extinguishing assemblies arranged in sequence along the first direction, and the two arc extinguishing assemblies (110) are respectively a first arc extinguishing assembly (111) and a second arc extinguishing assembly (112), the first arc extinguishing assembly (111) comprises a plurality of first arc extinguishing pieces (131) arranged in sequence along the first direction, the plurality of first arc extinguishing pieces (131) are arranged in parallel, and the end surface of the plurality of first arc extinguishing pieces (131) is located on a first surface (132), and the first surface (132) is parallel to the first direction.

7. The arc chute of claim 1, wherein The arc extinguishing assembly (110) comprises two arc extinguishing assemblies arranged in sequence along the first direction, and the two arc extinguishing assemblies (110) are respectively a first arc extinguishing assembly (111) and a second arc extinguishing assembly (112), the first arc extinguishing assembly (111) comprises a plurality of second arc extinguishing pieces (141) arranged in sequence along the first direction, the plurality of second arc extinguishing pieces (141) are arranged in parallel, and the end surface of the plurality of second arc extinguishing pieces (141) is located on a second surface (142) along the first direction, and the included angle between the second surface (142) and the first direction is less than 90°.

8. The arc chute of claim 7, wherein, The included angle of the second surface (142) is matched with the included angle of the arc striking plate (230).

9. The arc chute defined in Claims 6 or 7, wherein The second arc extinguishing assembly (112) comprises a plurality of third arc extinguishing pieces (151) arranged in sequence along the first direction, and the plurality of third arc extinguishing pieces (151) are arranged in parallel and at the same height.

10. A circuit breaker characterized by, The arc extinguishing chamber (100) comprises a shell, an operating mechanism, a stationary contact (220) and an arc extinguishing chamber (100) arranged in the shell, the operating mechanism is connected with a moving contact (210), the operating mechanism is driven to rotate to drive the moving contact (210) to contact or separate from the stationary contact (220), and the arc extinguishing chamber (100) is arranged on one side of the moving path of the moving contact (210).

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