DC circuit breaker

Abstract

The direct current circuit breaker comprises two pole circuit breaker modules, the two pole circuit breaker modules are connected in series, each pole circuit breaker module comprises a contact assembly, a magnetic blow-out assembly and an arc extinguishing assembly which are sequentially arranged in the first direction, and an arc striking space is formed between the contact assembly and the arc extinguishing assembly. The arc generated by the contact assembly enters the arc extinguishing assembly through the arc striking space, at least part of the magnetic blow-out assembly is arranged in the arc striking space, the direction of the magnetic field formed by the magnetic blow-out assembly is a second direction, the second direction is perpendicular to the first direction, and the directions of the magnetic fields formed by the magnetic blow-out assemblies of the two-pole circuit breaker module are the same. According to the direct current circuit breaker, it can be guaranteed that the electric arc in one pole can enter the arc extinguishing assembly and be extinguished, so that a current loop in the direct current circuit breaker is cut off, and non-polar magnetic blow-out of the magnetic blow-out assembly is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and in particular, relates to a DC circuit breaker. Background Art

[0002] In a circuit breaker, an arc is usually generated during the disconnection process of the moving contact and the stationary contact of the contact assembly. Arc extinguishing grids are often used in the circuit breaker to extinguish the arc to prevent the arc from damaging the internal parts of the circuit breaker.

[0003] However, in the case of low current, the arc is not easy to transfer from the contact assembly to the arc extinguishing grid. At present, a magnetic blowout device is usually used to produce a magnetic blowout effect on the arc so that the arc can be quickly transferred. However, the current magnetic blowout device is often set for one pole of a multi-pole circuit breaker. When the multi-pole circuit breaker works at the same time, the arcs in the multi-pole will be transferred in a direction away from the arc extinguishing grid at the same time, so that the arc cannot be extinguished. Utility Model Content

[0004] The present application provides a DC circuit breaker, which can ensure that the arc in one pole of the DC circuit breaker can enter the arc extinguishing component and be extinguished, thereby cutting off the current loop in the DC circuit breaker and realizing non-polarity magnetic blowing of the magnetic blowing component.

[0005] The present application provides a DC circuit breaker, which includes two-pole circuit breaker modules, which are connected in series, and each pole circuit breaker module includes a contact assembly, a magnetic blowing assembly and an arc extinguishing assembly arranged in sequence along a first direction, an arc striking space is provided between the contact assembly and the arc extinguishing assembly, and the arc generated by the contact assembly enters the arc extinguishing assembly through the arc striking space, the magnetic blowing assembly is at least partially arranged in the arc striking space, the direction of the magnetic field formed by the magnetic blowing assembly is a second direction, and the second direction is arranged perpendicular to the first direction, and the magnetic fields formed by the magnetic blowing assemblies of the two-pole circuit breaker modules have the same direction.

[0006] As above, the DC circuit breaker, wherein the magnetic blowing assembly includes a magnetic part and two magnetic dividing plates, wherein one magnetic dividing plate is arranged close to one pole of the magnetic part, and the other magnetic dividing plate is arranged close to the other pole of the magnetic part, and the two magnetic dividing plates are respectively arranged on both sides of the arc striking space along the second direction.

[0007] As above DC circuit breaker, the circuit breaker module also includes an arc striking assembly, the arc striking assembly is arranged in the arc striking space along the first direction, the contact assembly is electrically connected to the arc extinguishing assembly through the arc striking assembly, and the magnetic blowing assembly is connected to the arc striking assembly.

[0008] As above, the DC circuit breaker, wherein the arc-striking assembly includes a first arc-striking plate and a second arc-striking plate arranged at intervals along a third direction, the contact assembly is electrically connected to the two ends of the arc extinguishing assembly along the third direction through the first arc-striking plate and the second arc-striking plate, respectively, the magnetic part is arranged on a side of the first arc-striking plate away from the arc-striking space along the third direction, and the two magnetic separation plates are respectively connected to the two side surfaces of the first arc-striking plate along the second direction.

[0009] As above, the DC circuit breaker, wherein the contact assembly includes a moving contact and a stationary contact, the moving contact is rotatable, the circuit breaker module also includes a yoke assembly, the yoke assembly includes a first yoke part and a second yoke part, the first yoke part is connected to the moving contact, the second yoke part is connected to the stationary contact and is arranged opposite to the first yoke part, and when the moving contact and the stationary contact are in contact, the first yoke part and the second yoke part can be attracted.

[0010] In the DC circuit breaker as above, the first yoke is an annular structure, and the first yoke is arranged around the moving contact. The second yoke is a block structure, and the second yoke is arranged on a side of the static contact close to the moving contact.

[0011] As in the DC circuit breaker above, the moving contact includes a rotating part and an extending part, the rotating part is a cylindrical structure, the extending part protrudes from the outer circumferential surface of the rotating part and extends along the radial direction of the rotating part, the moving contact contacts the static contact through the extending part, and the first magnetic yoke is arranged around the extending part.

[0012] As in the DC circuit breaker above, the surface of the moving contact has a first contact point protrudingly arranged, and the surface of the stationary contact has a second contact point protrudingly arranged, the first contact point and the second contact point are arranged in relative positions, and the moving contact and the stationary contact are in contact through the first contact point and the second contact point.

[0013] As above, the DC circuit breaker, wherein the arc extinguishing assembly includes an arc extinguishing chamber and an exhaust channel connected to the arc extinguishing chamber, the arc extinguishing chamber includes a plurality of grids arranged at intervals along a third direction, the exhaust channel is arranged on a side of the arc extinguishing chamber away from the arc striking space, the exhaust channel has two exhaust ports, and the two exhaust ports are respectively arranged on both sides of the arc extinguishing chamber along the third direction.

[0014] As above, the DC circuit breaker further comprises an anti-ionization component, the anti-ionization component comprises two anti-ionization nets, the two anti-ionization nets are respectively arranged on both sides of the arc extinguishing chamber along the third direction, and the two anti-ionization nets are respectively connected to the two exhaust ports.

[0015] The DC circuit breaker of the present application includes a two-pole circuit breaker module. Since the two-pole circuit breaker modules are connected in series, the current directions of the contact assemblies passing through the two-pole circuit breaker modules are opposite. Each level of the circuit breaker module includes a contact assembly, a magnetic blowing assembly and an arc extinguishing assembly arranged in sequence along a first direction. The arc striking space is arranged between the contact assembly and the arc extinguishing assembly. Therefore, the magnetic blowing assembly of each pole circuit breaker module is arranged in the arc striking space. The magnetic blowing assemblies of each pole can form a magnetic field with the same direction in its corresponding arc striking space, and the direction of the magnetic field is the second direction, which can provide a magnetic field force along the first direction. In this way, it can be ensured that when the current directions of the two-pole circuit breaker modules are different, the arc in at least one of the poles can enter the arc extinguishing assembly through the contact assembly for arc extinguishing, thereby cutting off the current circuit inside the DC circuit breaker and realizing the non-polar magnetic blowing of the magnetic blowing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of the internal structure of a DC circuit breaker according to an embodiment of the present application;

[0018] Figure 2 A cross-sectional view of a circuit breaker module of a DC circuit breaker according to an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the structure of a contact assembly and a magnetic blow assembly of a DC circuit breaker according to an embodiment of the present application;

[0020] Figure 4 This is a schematic structural diagram of a contact assembly and a yoke assembly of a DC circuit breaker according to an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the cooperation between a first magnetic yoke and a second magnetic yoke of a DC circuit breaker according to an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of the coordination between the magnetic blow assembly and the arc striking assembly of the DC circuit breaker according to an embodiment of the present application.

[0023] Description of Figure Numbers:

[0024] 10. Contact assembly; 11. Moving contact; 111. Rotating part; 112. Extending part; 113. First contact point; 12. Stationary contact; 121. Second contact point; 20. Magnetic blowing assembly; 21. Magnetic part; 22. Magnetic dividing sheet; 30. Arc extinguishing assembly; 31. Arc extinguishing chamber; 32. Exhaust channel; 321. Exhaust port; 40. Arc striking space; 50. Arc striking assembly; 51. First arc striking sheet; 52. Second arc striking sheet; 60. Yoke assembly; 61. First yoke piece; 62. Second yoke piece; 70. Deionization assembly; 71. Deionization net; 81. First terminal; 82. Second terminal;

[0025] 100. Circuit breaker module;

[0026] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0028] like Figures 1 to 6 As shown, an embodiment of the present application provides a DC circuit breaker, which includes a two-pole circuit breaker module 100, which is connected in series, and each pole circuit breaker module 100 includes a contact assembly 10, a magnetic blowing assembly 20 and an arc extinguishing assembly 30 arranged in sequence along a first direction X, an arc striking space 40 is provided between the contact assembly 10 and the arc extinguishing assembly 30, and the arc generated by the contact assembly 10 enters the arc extinguishing assembly 30 through the arc striking space 40, and the magnetic blowing assembly 20 is at least partially arranged in the arc striking space 40, and the direction of the magnetic field formed by the magnetic blowing assembly 20 is a second direction Y, and the second direction Y is arranged perpendicular to the first direction X, and the magnetic field directions formed by the magnetic blowing assemblies 20 of the two-pole circuit breaker modules 100 are the same.

[0029] In specific implementation, the DC circuit breaker of the embodiment of the present application includes a two-pole circuit breaker module 100. Since the two-pole circuit breaker module 100 is connected in series, the current directions of the contact assemblies 10 passing through the two-pole circuit breaker modules 100 are opposite. Each level of the circuit breaker module 100 includes a contact assembly 10, a magnetic blowing assembly 20 and an arc extinguishing assembly 30 arranged in sequence along the first direction X. The arc striking space 40 is arranged between the contact assembly 10 and the arc extinguishing assembly 30. Therefore, the magnetic blowing assembly 20 of each pole circuit breaker module 100 is arranged in the arc striking space 40. The arc generated by the disconnection of the contact assembly 10 can pass through the arc striking space 40 to enter the arc extinguishing assembly 30 for arc extinguishing, and can be affected by the magnetic field force of the magnetic blowing assembly 20 in the arc striking space 40. Since the magnetic field direction of the magnetic blowing assembly 20 is the second direction Y, a magnetic field force along the first direction X is provided, thereby providing a magnetic blowing effect from the contact assembly 10 to the arc extinguishing assembly 30.

[0030] Moreover, the magnetic blowing assembly 20 of each pole can form a magnetic field with the same direction in its corresponding arc striking space 40, so as to ensure that when the current directions of the two-pole circuit breaker module 100 are different, the arc in at least one pole can enter the arc extinguishing assembly 30 through the contact assembly 10 to extinguish the arc, thereby cutting off the current circuit inside the DC circuit breaker and realizing the non-polar magnetic blowing of the magnetic blowing assembly 20.

[0031] like Figure 1 and Figure 3 As shown, a DC circuit breaker of an embodiment of the present application, wherein the magnetic blowing assembly 20 includes a magnetic part 21 and two magnetic dividing plates 22, wherein one magnetic dividing plate 22 is arranged close to one pole of the magnetic part 21, and the other magnetic dividing plate 22 is arranged close to the other pole of the magnetic part 21, and the two magnetic dividing plates 22 are respectively arranged on both sides of the arc striking space 40 along the second direction Y.

[0032] During specific implementation, the magnetic component 21 can respectively magnetize the two magnetic plates 22 arranged near its two poles, so that the two magnetic plates 22 form opposite polarities, and the two magnetic plates 22 are respectively arranged on both sides of the arc striking space 40 along the second direction Y, so that a magnetic field along the second direction Y can be formed in the arc striking space 40, and the magnetic field will generate a magnetic blowing force along the first direction X, and the magnetic blowing force can blow the arc from the contact assembly 10 into the arc extinguishing assembly 30 for arc extinguishing.

[0033] Moreover, the arrangement of the magnetic component 21 and two magnetic dividing plates 22 can increase the coverage area of ​​the magnetic field compared to the use of the magnetic component 21 alone. The two magnetic dividing plates 22 are respectively arranged on both sides of the arc striking space 40. The formed magnetic field can completely cover the arc striking space 40, so that all arcs passing through the arc striking space 40 can be affected by the magnetic blowing force, thereby preventing part of the arc from being unable to enter the arc extinguishing assembly 30 for arc extinguishing, causing continuous burning and damaging the DC circuit breaker.

[0034] like Figure 1 and Figure 3 As shown, a DC circuit breaker of an embodiment of the present application, wherein the circuit breaker module 100 also includes an arc striking assembly 50, the arc striking assembly 50 is arranged in the arc striking space 40 along the first direction X, the contact assembly 10 is electrically connected to the arc extinguishing assembly 30 through the arc striking assembly 50, and the magnetic blowing assembly 20 is connected to the arc striking assembly 50.

[0035] In specific implementation, the setting of the arc striking assembly 50 can introduce the arc generated by the contact assembly 10 into the arc extinguishing assembly 30 for arc extinguishing, thereby playing a role in assisting arc striking; and the magnetic blowing assembly 20 is connected to the arc striking assembly 50, and the arc striking assembly 50 is penetrated in the arc striking space 40 along the first direction X. The arc striking assembly 50 provides an installation basis for the magnetic blowing assembly 20, so that the magnetic blowing assembly 20 can form a magnetic field in the arc striking space 40, generate a magnetic blowing force, and blow the arc into the arc extinguishing assembly 30, thereby ensuring the arc extinguishing effect.

[0036] like Figure 1 , Figure 3 and Figure 6 As shown, the DC circuit breaker of the embodiment of the present application, wherein the arc-striking assembly 50 includes a first arc-striking piece 51 and a second arc-striking piece 52 spaced apart along the third direction Z, the contact assembly 10 is electrically connected to the two ends of the arc-extinguishing assembly 30 along the third direction Z through the first arc-striking piece 51 and the second arc-striking piece 52, respectively, the magnetic member 21 is arranged on a side of the first arc-striking piece 51 away from the arc-striking space 40 along the third direction Z, and the two magnetic separation pieces 22 are respectively connected to the two side surfaces of the first arc-striking piece 51 along the second direction Y. It should be noted that, Figure 6 The direction indicated by the arrow is the direction of the magnetic field.

[0037] In specific implementation, the first arc-striking plate 51 and the second arc-striking plate 52 are arranged at intervals and electrically connected to the two ends of the arc extinguishing component 30 along the third direction Z, so that the arc can be respectively led to the two ends of the arc extinguishing component 30 along the third direction Z, thereby stretching the arc in the third direction Z. When the stretched arc enters the arc extinguishing component 30 for cutting and extinguishing, the arc extinguishing effect is better and the arc can be completely extinguished.

[0038] The two magnetic plates 22 are respectively connected to the two side surfaces of the first arc-starting plate 51 along the second direction Y, so that magnetic poles can be formed on both sides of the arc-starting space 40 along the second direction Y, thereby forming a magnetic field in the arc-starting space 40. Moreover, the magnetic part 21 is arranged on the side of the first arc-starting plate 51 along the third direction Z away from the arc-starting space 40, and will not affect the magnetic field in the arc-starting space 40, thereby ensuring the magnetic blowing effect of the magnetic blowing assembly 20.

[0039] like Figure 4 and Figure 5As shown, a DC circuit breaker of an embodiment of the present application, wherein the contact assembly 10 includes a moving contact 11 and a stationary contact 12, the moving contact 11 is rotatably arranged, the circuit breaker module 100 also includes a yoke assembly 60, the yoke assembly 60 includes a first yoke component 61 and a second yoke component 62, the first yoke component 61 is connected to the moving contact 11, the second yoke component 62 is connected to the stationary contact 12 and is arranged opposite to the first yoke component 61, when the moving contact 11 and the stationary contact 12 are in contact, the first yoke component 61 and the second yoke component 62 can be attracted.

[0040] During specific implementation, the moving contact 11 and the stationary contact 12 can maintain their contact state under the action of the yokes of the first yoke part 61 and the second yoke part 62. As the current in the moving contact 11 and the stationary contact 12 increases, the yoke action can increase the attraction between the two, thereby avoiding insufficient pressure between the moving contact 11 and the stationary contact 12 under high load conditions, which may easily lead to the inability to always maintain the contact state. Frequent sparking between the moving contact 11 and the stationary contact 12 is avoided, which may cause fluctuations in the circuit system used by the DC circuit breaker, thereby improving the short withstand index of the DC circuit breaker.

[0041] like Figure 4 and Figure 5 As shown, the DC circuit breaker of the embodiment of the present application, wherein the first yoke 61 is an annular structure, the first yoke 61 is arranged around the moving contact 11, the second yoke 62 is a block structure, the second yoke 62 is arranged on a side of the static contact 12 close to the moving contact 11.

[0042] In a specific implementation, when the moving contact 11 and the stationary contact 12 are in contact, the first yoke 61 and the second yoke 62 are attracted to each other to form an overall closed ring structure. When the current passes through the moving contact 11 and the stationary contact 12, a magnetic field is generated around the moving contact 11 and the stationary contact 12. The first yoke 61 and the second yoke 62 can enclose the magnetic field around the moving contact 11, thereby enhancing the attraction between the moving contact 11 and the stationary contact 12 and ensuring that the moving contact 11 and the stationary contact 12 are always in contact.

[0043] Optionally, the first yoke 61 may be a block structure, and the second yoke 62 may be an annular structure. When the moving contact 11 and the stationary contact 12 are in contact with each other, the first yoke 61 and the second yoke 62 can form a complete annular structure, which can ensure that the moving contact 11 and the stationary contact 12 are always in contact. It should be noted that the first yoke 61 and the second yoke 62 include but are not limited to the above structures.

[0044] like Figure 4As shown, a DC circuit breaker of an embodiment of the present application, wherein the moving contact 11 includes a rotating portion 111 and an extending portion 112, the rotating portion 111 is a cylindrical structure, the extending portion 112 protrudes from the outer circumferential surface of the rotating portion 111 and extends along the radial direction of the rotating portion 111, the moving contact 11 is in contact with the static contact 12 through the extending portion 112, and the first magnetic yoke 61 is arranged around the extending portion 112.

[0045] During specific implementation, the cylindrical rotating portion 111 is the rotation center of the moving contact 11, which can drive the extension portion 112 to rotate until it contacts the static contact 12. The extension portion 112 is extended along the radial direction of the rotating portion 111. When in contact with the static contact 12, the current passes through the extension portion 112 to reach the static contact 12, which is equivalent to the current flowing in the wire. Since the first magnetic yoke 61 is arranged around the extension portion 112, when the current passes through the extension portion 112, a circle of magnetic field can be formed on the outer peripheral surface of the extension portion 112. The setting of the first magnetic yoke 61 can strengthen the magnetic field, thereby increasing the attraction between the extension portion 112 and the static contact 12, and the shape of the extension portion 112 is suitable for the arrangement of the first magnetic yoke 61, providing an installation basis for the setting of the first magnetic yoke 61.

[0046] like Figure 4 As shown, a DC circuit breaker in an embodiment of the present application, wherein the surface of the moving contact 11 has a protruding first contact point 113, and the surface of the stationary contact 12 has a protruding second contact point 121, the first contact point 113 and the second contact point 121 are arranged in relative positions, and the moving contact 11 and the stationary contact 12 are in contact with each other through the first contact point 113 and the second contact point 121.

[0047] In a specific implementation, an arc will be generated between the moving contact 11 and the static contact 12 during the disconnection process. After multiple disconnections, the contact point between the moving contact 11 and the static contact 12 will be worn under the action of the arc. Therefore, a protruding first contact point 113 and a second contact point 121 are provided on the contact surface between the moving contact 11 and the static contact 12. When the first contact point 113 and the second contact point 121 are slightly worn, they can still be provided to protrude from the contact surface between the moving contact 11 and the static contact 12, so that the moving contact 11 and the static contact 12 can contact each other in a closed state, thereby avoiding the situation where the moving contact 11 and the static contact 12 cannot be closed.

[0048] like Figure 2 As shown, a DC circuit breaker of an embodiment of the present application, wherein the arc extinguishing assembly 30 includes an arc extinguishing chamber 31 and an exhaust channel 32 connected to the arc extinguishing chamber 31, the arc extinguishing chamber 31 includes a plurality of grids arranged at intervals along a third direction Z, the exhaust channel 32 is arranged on a side of the arc extinguishing chamber 31 away from the arc striking space 40, the exhaust channel 32 has two exhaust ports 321, and the two exhaust ports 321 are respectively arranged on both sides of the arc extinguishing chamber 31 along the third direction Z.

[0049] During specific implementation, after the arc is extinguished by cutting of each grid in the arc extinguishing chamber 31, gas containing charged particles will be generated. After the gas enters the exhaust channel 32 at the bottom of the DC circuit breaker, it can be discharged through two exhaust ports 321. The two exhaust ports 321 are respectively arranged on both sides of the arc extinguishing chamber 31 along the third direction Z, thereby avoiding the situation where the gas stays in the exhaust channel 32 for too long, which affects the arc extinguishing of the arc extinguishing chamber 31.

[0050] like Figure 1 and Figure 2 As shown, the DC circuit breaker of the embodiment of the present application further includes an anti-ionization component 70, the anti-ionization component 70 includes two anti-ionization grids 71, the two anti-ionization grids 71 ​​are respectively arranged on both sides of the arc extinguishing chamber 31 along the third direction Z, and the two anti-ionization grids 71 ​​are respectively connected to the two exhaust ports 321.

[0051] In specific implementation, when the gas carrying charged particles is discharged through the two exhaust ports 321, it contacts the free charged particles in the gas. The free charged particles in the gas can be eliminated so that the gas will not carry charged particles after being completely discharged from the DC circuit breaker, thereby avoiding the situation in which the gas breaks down again and causes damage to the circuit breaker.

[0052] Specifically, Figure 3 As shown, along the third direction Z, the two-pole circuit breaker modules 100 include a first terminal 81 and a second terminal 82 that are spaced apart from each other. The first terminals 81 of the two-pole circuit breaker modules 100 are connected to an external load through a wire, and the second terminals 82 of the two-pole circuit breaker modules 100 are connected through a wire to realize the series connection between the two-pole circuit breaker modules 100.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A DC circuit breaker, characterized in that: The invention comprises a two-pole circuit breaker module (100), wherein the two-pole circuit breaker modules (100) are connected in series, and each of the circuit breaker modules (100) comprises a contact assembly (10), a magnetic blowing assembly (20) and an arc extinguishing assembly (30) arranged in sequence along a first direction (X); an arc striking space (40) is arranged between the contact assembly (10) and the arc extinguishing assembly (30); an arc generated by the contact assembly (10) enters the arc extinguishing assembly (30) through the arc striking space (40); the magnetic blowing assembly (20) is at least partially arranged in the arc striking space (40); the direction of the magnetic field formed by the magnetic blowing assembly (20) is a second direction (Y); the second direction (Y) is arranged perpendicular to the first direction (X); and the directions of the magnetic fields formed by the magnetic blowing assemblies (20) of the two-pole circuit breaker modules (100) are the same.

2. The DC circuit breaker according to claim 1, characterized in that: The magnetic blowing assembly (20) comprises a magnetic part (21) and two magnetic separation plates (22), wherein one of the magnetic separation plates (22) is arranged close to one pole of the magnetic part (21), and the other magnetic separation plate (22) is arranged close to the other pole of the magnetic part (21), and the two magnetic separation plates (22) are respectively arranged on both sides of the arc striking space (40) along the second direction (Y).

3. The DC circuit breaker according to claim 2, characterized in that: The circuit breaker module (100) further comprises an arc striking assembly (50), wherein the arc striking assembly (50) is arranged in the arc striking space (40) along the first direction (X), the contact assembly (10) is electrically connected to the arc extinguishing assembly (30) via the arc striking assembly (50), and the magnetic blowing assembly (20) is connected to the arc striking assembly (50).

4. The DC circuit breaker according to claim 3, characterized in that: The arc-striking assembly (50) comprises a first arc-striking piece (51) and a second arc-striking piece (52) which are arranged at intervals along a third direction (Z); the contact assembly (10) is electrically connected to the two ends of the arc extinguishing assembly (30) along the third direction (Z) through the first arc-striking piece (51) and the second arc-striking piece (52), respectively; the magnetic member (21) is arranged on a side of the first arc-striking piece (51) away from the arc-striking space (40) along the third direction (Z); and the two magnetic separation pieces (22) are respectively connected to the two side surfaces of the first arc-striking piece (51) along the second direction (Y).

5. The DC circuit breaker according to claim 1, characterized in that: The contact assembly (10) comprises a moving contact (11) and a stationary contact (12), wherein the moving contact (11) is rotatably arranged. The circuit breaker module (100) further comprises a yoke assembly (60), wherein the yoke assembly (60) comprises a first yoke component (61) and a second yoke component (62), wherein the first yoke component (61) is connected to the moving contact (11), and the second yoke component (62) is connected to the stationary contact (12) and is arranged opposite to the first yoke component (61). When the moving contact (11) and the stationary contact (12) are in a contact state, the first yoke component (61) and the second yoke component (62) are arranged to be attracted to each other.

6. The DC circuit breaker according to claim 5, characterized in that: The first yoke component (61) is an annular structure, and the first yoke component (61) is arranged around the moving contact (11); the second yoke component (62) is a block structure, and the second yoke component (62) is arranged on a side of the stationary contact (12) close to the moving contact (11).

7. The DC circuit breaker according to claim 6, characterized in that: The moving contact (11) comprises a rotating portion (111) and an extending portion (112); the rotating portion (111) is a cylindrical structure; the extending portion (112) protrudes from the outer peripheral surface of the rotating portion (111) and extends along the radial direction of the rotating portion (111); the moving contact (11) contacts the stationary contact (12) via the extending portion (112); and the first magnetic yoke (61) is arranged around the extending portion (112).

8. The DC circuit breaker according to claim 6, characterized in that: The surface of the moving contact (11) has a protruding first contact point (113), and the surface of the stationary contact (12) has a protruding second contact point (121); the first contact point (113) and the second contact point (121) are arranged in relative positions, and the moving contact (11) and the stationary contact (12) are in contact with each other via the first contact point (113) and the second contact point (121).

9. The DC circuit breaker according to claim 1, characterized in that: The arc extinguishing assembly (30) comprises an arc extinguishing chamber (31) and an exhaust passage (32) connected to the arc extinguishing chamber (31); the arc extinguishing chamber (31) comprises a plurality of grid plates arranged at intervals along a third direction (Z); the exhaust passage (32) is arranged on a side of the arc extinguishing chamber (31) away from the arc striking space (40); the exhaust passage (32) has two exhaust ports (321); and the two exhaust ports (321) are respectively arranged on two sides of the arc extinguishing chamber (31) along the third direction (Z).

10. The DC circuit breaker according to claim 9, characterized in that: The DC circuit breaker further comprises an anti-ionization component (70), wherein the anti-ionization component (70) comprises two anti-ionization nets (71), wherein the two anti-ionization nets (71) are respectively arranged on both sides of the arc extinguishing chamber (31) along the third direction (Z), and the two anti-ionization nets (71) are respectively connected to the two exhaust ports (321).

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