Double-arc magnetizer arc blow-out system and direct current switch

Abstract

The utility model discloses a double-arc magnetizer arc blowing system and a direct current switch. A U-shaped opening of a first magnetizer is sleeved on a static arc angle; the U-shaped opening of the second magnetizer is sleeved on the movable arc angle; the U-shaped opening of the first magnetizer is opposite to the U-shaped opening of the second magnetizer; the first magnetizer side wall I, the first magnetizer side wall II, the second magnetizer side wall I and the second magnetizer side wall II are all positioned between the static arc angle and the movable arc angle; the first arc isolating wall is positioned on the same side of the first magnetizer side wall I and the second magnetizer side wall; the second arc isolating wall is positioned on the same side of the first magnetizer side wall II and the second magnetizer side wall II; and the first arc isolating wall and the second arc isolating wall are used for isolating the first magnetizer and the second magnetizer from the electric arc. According to the utility model, the double-arc magnetizer side wall structural design is adopted, so that the magnetic field effect on electric arcs is enhanced, and magnetic field distribution capable of driving forward and reverse current electric arcs to an arc extinguish chamber is generated in an electric arc movement area of the circuit breaker.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and particularly relates to a double-arc-shaped magnetic conductor arc-blowing system and a DC switch. Background Technique

[0002] Photovoltaic, energy storage and other systems all require DC switches for system control and protection. The breaking of non-polar DC arcs is a key technical problem for DC switches. Especially in the current development trend of high voltage, it brings higher difficulties to the development and performance improvement of non-polar DC switches. The breaking of low-voltage DC arcs mainly relies on increasing the arc voltage to limit the current to zero crossing, and the arc is broken through the manufactured zero crossing point.

[0003] However, in the prior art, the volume of the circuit breaker is limited, the speed of driving the arc towards the arc extinguishing chamber is slow, and the current direction will affect the movement direction of the arc. Content of the Utility Model

[0004] In order to solve the problems existing in the prior art, the utility model provides a double-arc-shaped magnetic conductor arc-blowing system and a DC switch, which generate a magnetic field distribution in the arc movement area of the circuit breaker that can drive the arcs of both positive and negative current directions towards the arc extinguishing chamber. By adopting the design of the double-arc-shaped magnetic conductor side wall structure, the magnetic field effect on the arc is enhanced. The utility model can be better used in the arc extinguishing system of non-polar DC circuit breakers, with a simple structure and good economy.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A double-arc-shaped magnetic conductor arc-blowing system includes a first magnetic conductor, a second magnetic conductor, a first permanent magnet, a second permanent magnet, a first arc separating wall and a second arc separating wall;

[0007] The first magnetic conductor includes a first magnetic conductor side wall one, a first magnetic conductor side wall two, and a first magnetic conductor connecting bottom; the first magnetic conductor side wall one and the first magnetic conductor side wall two are parallel and symmetric, and the first magnetic conductor connecting bottom is respectively connected to the first magnetic conductor side wall one and the first magnetic conductor side wall two to form a U-shaped structure; the first polar surface of the first permanent magnet contacts the outer side surface of the first magnetic conductor connecting bottom;

[0008] The second magnetic conductor includes a second magnetic conductor side wall one, a second magnetic conductor side wall two, and a second magnetic conductor connecting bottom; the second magnetic conductor side wall one and the second magnetic conductor side wall two are parallel and symmetric, and the second magnetic conductor connecting bottom is respectively connected to the second magnetic conductor side wall one and the second magnetic conductor side wall two to form a U-shaped structure; the first polar surface of the second permanent magnet contacts the inner side surface of the second magnetic conductor connecting bottom;

[0009] The U-shaped opening of the first magnetic conductor is sleeved on the static arc angle; the U-shaped opening of the second magnetic conductor is sleeved on the moving arc angle; the U-shaped opening of the first magnetic conductor is arranged opposite to the U-shaped opening of the second magnetic conductor; an arc extinguishing chamber is arranged between the moving arc angle and the static arc angle; the static arc angle is connected to a static contact; the moving arc angle is connected to a moving contact; the first side wall one of the first magnetic conductor, the second side wall one of the first magnetic conductor, the first side wall one of the second magnetic conductor, and the second side wall one of the second magnetic conductor are all located between the static arc angle and the moving arc angle;

[0010] The first arc separating wall is located on the same side of the first side wall one of the first magnetic conductor and the first side wall one of the second magnetic conductor; the second arc separating wall is located on the same side of the second side wall two of the first magnetic conductor and the second side wall two of the second magnetic conductor; the first arc separating wall and the second arc separating wall are used to separate the first magnetic conductor and the second magnetic conductor from the electric arc.

[0011] Preferably, the first polar surface of the first permanent magnet has the opposite polarity to the first polar surface of the second permanent magnet.

[0012] Preferably, the symmetry planes of the first magnetic conductor, the first permanent magnet, the second magnetic conductor, and the second permanent magnet coincide.

[0013] Preferably, the first side wall one of the first magnetic conductor and the first side wall one of the second magnetic conductor are located on the same side of the moving contact and the static contact; the second side wall two of the first magnetic conductor and the second side wall two of the second magnetic conductor are located on the same side of the moving contact and the static contact;

[0014] A gap is arranged between the first side wall one of the first magnetic conductor and the first side wall one of the second magnetic conductor; a gap is arranged between the second side wall two of the first magnetic conductor and the second side wall two of the second magnetic conductor.

[0015] Preferably, both the first side wall one and the second side wall two of the first magnetic conductor are provided with first magnetic conductor arc-shaped parts; the first magnetic conductor arc-shaped parts extend from the moving contact and static contact areas towards the arc extinguishing chamber direction, and the first magnetic conductor arc-shaped parts are connected to the first magnetic conductor connection bottom through first magnetic conductor connection parts.

[0016] Preferably, both the first side wall one and the second side wall two of the second magnetic conductor are provided with second magnetic conductor arc-shaped parts; the second magnetic conductor arc-shaped parts extend from the moving contact and static contact areas towards the arc extinguishing chamber direction, and the second magnetic conductor arc-shaped parts are connected to the second magnetic conductor connection bottom through second magnetic conductor connection parts.

[0017] Preferably, the first magnetic conductor arc-shaped parts of the first side wall one and the second side wall two of the first magnetic conductor are parallel to the radian of the static arc angle; and / or,

[0018] The second magnetic conductor arc-shaped parts of the first side wall one and the second side wall two of the second magnetic conductor are parallel to the radian of the moving arc angle; and / or,

[0019] The first magnetic conductor arc-shaped portions of the first magnetic conductor side wall 1 and the first magnetic conductor side wall 2 are parallel to the second magnetic conductor arc-shaped portions of the second magnetic conductor side wall 1 and the second magnetic conductor side wall 2, and are parallel to the radian of the moving arc angle.

[0020] Preferably, the second polar surface of the second permanent magnet contacts the moving arc angle, or the second polar surface of the second permanent magnet contacts the moving arc angle through a ferromagnetic body.

[0021] Preferably, there is a gap between the first magnetic conductor side wall 1 and the first magnetic conductor side wall 2 and the static arc angle along the side wall plane; there is a gap between the second magnetic conductor arc-shaped portions of the second magnetic conductor side wall 1 and the second magnetic conductor side wall 2 and the moving arc angle along the side wall plane.

[0022] A DC switch includes a double-arc-shaped magnetic conductor arc-blowing system according to any one of the above.

[0023] Compared with the prior art, the utility model has the following beneficial technical effects:

[0024] The utility model discloses a double-arc-shaped magnetic conductor arc-blowing system. By adopting a pair of double-symmetrical arc-shaped magnetic conductors and cooperating with two permanent magnets, which are respectively sleeved on the static arc angle and the moving arc angle of the circuit breaker, the magnetization polarities of the two magnetic conductors are the same. At the same time, the moving arc angle is magnetized to have a polarity opposite to that of the magnetic conductor, so as to generate a magnetic field distribution between the moving and static contacts and the moving and static arc angles, including a magnetic field component (the first magnetic field component) parallel to the arc separating wall, a magnetic field component (the second magnetic field component) perpendicular to the arc separating wall near the first arc separating wall, and a magnetic field component (the third magnetic field component) perpendicular to the arc separating wall near the second arc separating wall; meanwhile, the magnetic field intensity in the arc-shaped area of the magnetic conductor is significantly higher than that in other areas, which can better act on the arc and quickly drive the movement of the arc. Under the above magnetic field distribution, the arc will deflect towards the first arc separating wall or the second arc separating wall under the action of the first magnetic field component due to the different current directions, and then move towards the arc extinguishing chamber under the action of the second magnetic field component or the third magnetic field component near the arc separating wall. Regardless of the current direction, the arc will receive a magnetic force and move towards the arc extinguishing chamber.

[0025] The utility model cooperates two arc-shaped magnetic conductors with two permanent magnets, which are respectively sleeved on the static arc angle and the moving arc angle of the circuit breaker. The two magnetic conductors have the same polarity under the magnetization of the permanent magnets, and then combined with the moving arc angle with opposite magnetization polarity, a magnetic field distribution that can drive the forward and reverse current arcs towards the arc extinguishing chamber is generated in the arc movement area of the circuit breaker. At the same time, the side wall structure of the double-arc magnetic conductor is designed. On the one hand, it enhances the magnetic field effect on the arc, and on the other hand, it avoids the influence of the magnetic field distribution on the arc root to generate a magnetic field force in the opposite direction. Therefore, the utility model can be better used in the arc extinguishing system of a non-polar DC circuit breaker, with a simple structure and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a front view of the structure of a double-arc magnetic conductor arc-blowing system of the utility model;

[0027] Figure 2 is a side view of the structure of a double-arc magnetic conductor arc-blowing system of the utility model;

[0028] Figure 3 is a schematic diagram of the structure of the first permanent magnet in the utility model;

[0029] Figure 4 is a schematic diagram of the structure of the second permanent magnet in the utility model;

[0030] In the drawings: the first magnetic conductor 1; the second magnetic conductor 2; the first permanent magnet 3; the second permanent magnet 4; the moving contact 5; the moving arc angle 6; the static contact 7; the static arc angle 8; the arc extinguishing chamber 9; the first arc separating wall 10; the first side wall of the first magnetic conductor 11; the second side wall of the first magnetic conductor 12; the connecting bottom of the first magnetic conductor 13; the connecting part of the first magnetic conductor 14; the arc-shaped part of the first magnetic conductor 15; the second arc separating wall 20; the first side wall of the second magnetic conductor 21; the second side wall of the second magnetic conductor 22; the connecting bottom of the second magnetic conductor 23; the connecting part of the second magnetic conductor 24; the arc-shaped part of the second magnetic conductor 25. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0037] It should also be understood that the terms used in the specification of the present utility model are merely for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0038] It should be further understood that the term "and / or" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] Structural schematic diagrams according to the disclosed embodiments of the present utility model are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary, and may actually deviate due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes and relative positions according to actual needs.

[0040] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0041] Embodiment

[0042] An embodiment of the present utility model provides a double-arc magnetic conductor arc-blowing system, including: a first magnetic conductor 1, a second magnetic conductor 2, a first permanent magnet 3, a second permanent magnet 4, a moving contact 5, a moving arc angle 6, a static contact 7, a static arc angle 8, an arc extinguishing chamber 9 and an arc separating wall.

[0043] The first magnetic conductor 1 includes a first magnetic conductor side wall one 11, a first magnetic conductor side wall two 12, and a first magnetic conductor connecting bottom 13. The first magnetic conductor side wall one 11 and the first magnetic conductor side wall two 12 are parallel and symmetric. The first magnetic conductor connecting bottom 13 is respectively connected to the first magnetic conductor side wall one 11 and the first magnetic conductor side wall two 12 to form a U-shaped structure; the first polar surface of the first permanent magnet 3 contacts the outer side surface of the first magnetic conductor connecting bottom 13.

[0044] The second magnetic conductor 2 includes a second magnetic conductor side wall one 21, a second magnetic conductor side wall two 22, and a second magnetic conductor connecting bottom 23. The second magnetic conductor side wall one 21 and the second magnetic conductor side wall two 22 are parallel and symmetric. The second magnetic conductor connecting bottom 23 is respectively connected to the second magnetic conductor side wall one 21 and the second magnetic conductor side wall two 22 to form a U-shaped structure; the first polar surface of the second permanent magnet 4 contacts the inner side surface of the second magnetic conductor connecting bottom 23.

[0045] The first polar surface of the first permanent magnet 3 and the first polar surface of the second permanent magnet 4 have opposite polarities.

[0046] The U-shaped opening of the first magnetic conductor 1 faces the U-shaped opening of the second magnetic conductor 2.

[0047] The symmetry planes of the first magnetic conductor 1, the first permanent magnet 3, the second magnetic conductor 2, and the second permanent magnet 4 coincide;

[0048] The U-shaped opening of the first magnetic conductor 1 is sleeved on the static arc angle 8; one side of the connecting bottom 13 of the first magnetic conductor contacts the static arc angle 8, and the other side of the connecting bottom 13 of the first magnetic conductor contacts the first permanent magnet 3, and the first permanent magnet 3 does not contact the static arc angle 8.

[0049] The U-shaped opening of the second magnetic conductor 2 is sleeved on the moving arc angle 6, and the second permanent magnet 4 is sandwiched between the connecting bottom 23 of the second magnetic conductor and the moving arc angle 6.

[0050] The first side wall 11 of the first magnetic conductor and the first side wall 21 of the second magnetic conductor are on the same side of the moving contact 5 and the static contact 7, and are between the static arc angle 8 and the moving arc angle 6; the moving contact 5 can move relative to the static contact 7 to realize the closing and separation of the moving contact 5 and the static contact 7.

[0051] There is a gap between the first side wall 11 of the first magnetic conductor and the first side wall 21 of the second magnetic conductor.

[0052] The second side wall 12 of the first magnetic conductor and the second side wall 22 of the second magnetic conductor are on the same side of the moving contact 5 and the static contact 7, and are between the static arc angle 8 and the moving arc angle 6.

[0053] There is a gap between the second side wall 12 of the first magnetic conductor and the second side wall 22 of the second magnetic conductor.

[0054] The arc separating wall includes a first arc separating wall 10 and a second arc separating wall 20. The first arc separating wall 10 is on the same side of the moving contact 5 and the static contact 7 as the first side wall 11 of the first magnetic conductor and the first side wall 21 of the second magnetic conductor, and the first arc separating wall 10 is between the first side wall 11 of the first magnetic conductor, the first side wall 21 of the second magnetic conductor, the moving contact 5, the static contact 7, the moving arc angle 6, and the static arc angle 8.

[0055] The second arc separating wall 20 is on the same side of the moving contact 5 and the static contact 7 as the second side wall 12 of the first magnetic conductor and the second side wall 22 of the second magnetic conductor, and the second arc separating wall 20 is between the second side wall 12 of the first magnetic conductor, the second side wall 22 of the second magnetic conductor, the moving contact 5, the static contact 7, the moving arc angle 6, and the static arc angle 8. The first arc separating wall 10 and the second arc separating wall 20 are used to separate the first magnetic conductor 1 and the second magnetic conductor 2 from the arc.

[0056] The arc extinguishing chamber 9 is located between the moving arc angle 6 and the static arc angle 8.

[0057] Both the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 have an arc portion and a connecting portion. The first magnetic conductor arc portions 15 of the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 extend from the regions of the moving contact 5 and the static contact 7 towards the arc extinguishing chamber 9. The first magnetic conductor connecting portions 14 connect the first magnetic conductor arc portions 15 of the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 to the first magnetic conductor connecting base 13 respectively.

[0058] Both the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22 have an arc portion and a connecting portion. The second magnetic conductor arc portions 25 of the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22 extend from the regions of the moving contact 5 and the static contact 7 towards the arc extinguishing chamber 9. The second magnetic conductor connecting portions 24 connect the second magnetic conductor arc portions 25 of the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22 to the second magnetic conductor connecting base 23 respectively.

[0059] The material of the moving arc angle 6 is a conductive ferromagnetic material. The second polar surface of the second permanent magnet 4 contacts the moving arc angle 6, or the second polar surface of the second permanent magnet 4 contacts the moving arc angle 6 through a ferromagnetic body.

[0060] There is a gap between the first magnetic conductor arc portions 15 of the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 and the static arc angle 8 along the side wall plane.

[0061] There is a gap between the second magnetic conductor arc portions 25 of the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22 and the moving arc angle 6 along the side wall plane.

[0062] The radian of the first magnetic conductor arc portions 15 of the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 is similar to or parallel to that of the static arc angle 8.

[0063] The radian of the second magnetic conductor arc portions 25 of the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22 is similar to or parallel to that of the moving arc angle 6.

[0064] The radian of the first magnetic conductor arc portions 15 of the first magnetic conductor side wall 11 and the second first magnetic conductor side wall 12 can also be similar to or parallel to the radian of the second magnetic conductor arc portions 25 of the second magnetic conductor side wall 21 and the second second magnetic conductor side wall 22, and is similar to or parallel to the radian of the moving arc angle 6.

[0065] Inside ferromagnetic materials such as iron, cobalt, and nickel, there are many magnetic domains. When an external magnetic field is applied, the magnetic moments of these magnetic domains tend to align with the external magnetic field in the same direction, thus forming a strong magnetization vector and its induced magnetic field. When the polar surface of a permanent magnet contacts a ferromagnetic material, the ferromagnetic material will be magnetized and exhibit a magnetic field with the same polarity as the contacted polar surface within a certain range. Using this principle, the present utility model adopts a magnetic conductor with a pair of double-symmetrical arcs, which is combined with two permanent magnets and respectively sleeved on the static arc angle and the moving arc angle of a circuit breaker. The magnetization polarities of the two magnetic conductors are the same. At the same time, the moving arc angle is magnetized to have a polarity opposite to that of the magnetic conductor, thereby generating a magnetic field distribution between the moving and static contacts and the moving and static arc angles. This magnetic field has the following characteristics: there is a magnetic field component parallel to the arc separating wall (the first magnetic field component), a magnetic field component perpendicular to the arc separating wall near the first arc separating wall 10 (the second magnetic field component), and a magnetic field component perpendicular to the arc separating wall near the second arc separating wall 20 (the third magnetic field component); at the same time, the magnetic field intensity in the arc-shaped area of the magnetic conductor is significantly higher than that in other areas, which can better act on the arc and quickly drive the movement of the arc. Under the above magnetic field distribution, the arc will deflect towards the first arc separating wall 10 or the second arc separating wall 20 under the action of the first magnetic field component due to the different current directions, and then move towards the arc extinguishing chamber under the action of the second magnetic field component or the third magnetic field component near the arc separating wall. Regardless of the current direction, the arc will be subjected to a magnetic force and move towards the arc extinguishing chamber.

[0066] In addition, it should be emphasized that the present application adopts the side wall structure of the arc-shaped arc separating wall. On the one hand, the magnetic field intensity can be enhanced in the arc-shaped area to make the arc move quickly; on the other hand, it avoids the effect of the magnetic conducting plate at the arc root of the moving and static arc angles. Since there is a component perpendicular to the arc separating wall in the current direction in the arc root area of the arc, the direction of the magnetic force generated by the above magnetic field on the arc of this component current will, to a certain extent, inhibit the movement of the arc towards the arc extinguishing chamber.

[0067] Embodiment 2

[0068] The embodiment of the present utility model also provides a DC switch, which has any one of the arc-blowing systems as described above.

[0069] The present utility model adopts a pair of magnetic conductors with double-symmetrical arcs in cooperation with a pair of permanent magnets, which are respectively sleeved on the static arc angle and the moving arc angle of a circuit breaker. The pair of magnetic conductors have the same polarity under the magnetization of the permanent magnets, and combined with the moving arc angle magnetized to have the opposite polarity, a magnetic field distribution that can drive the arcs of both positive and reverse currents towards the arc extinguishing chamber is generated in the arc movement area of the circuit breaker. At the same time, the side wall structure design of the double-arc magnetic conductor is adopted. On the one hand, it enhances the magnetic field effect on the arc, and on the other hand, it avoids the influence of the magnetic field distribution on generating a magnetic force in the opposite direction on the arc root. Therefore, this technical solution can be better used in the arc extinguishing system of a non-polar DC circuit breaker, with a simple structure and good economy.

[0070] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0071] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the claims of the present utility model.

Claims

1. A double arc magnetic conductor arc blowing system, characterized in that: It comprises a first magnetic conductor (1), a second magnetic conductor (2), a first permanent magnet (3), a second permanent magnet (4), a first arc-isolating wall (10) and a second arc-isolating wall (20); The first magnetizer (1) comprises a first magnetizer side wall 1 (11), a first magnetizer side wall 2 (12), and a first magnetizer connecting bottom (13); the first magnetizer side wall 1 (11) and the first magnetizer side wall 2 (12) are parallel and symmetrical, and the first magnetizer connecting bottom (13) is respectively connected to the first magnetizer side wall 1 (11) and the first magnetizer side wall 2 (12) to form a U-shaped structure; the first polarity surface of the first permanent magnet (3) is in contact with the outer side surface of the first magnetizer connecting bottom (13); The second magnetizer (2) comprises a second magnetizer side wall 1 (21), a second magnetizer side wall 2 (22), and a second magnetizer connecting bottom (23); the second magnetizer side wall 1 (21) and the second magnetizer side wall 2 (22) are parallel and symmetrical, and the second magnetizer connecting bottom (23) is respectively connected to the second magnetizer side wall 1 (21) and the second magnetizer side wall 2 (22) to form a U-shaped structure; the first polarity surface of the second permanent magnet (4) is in contact with the inner side surface of the second magnetizer connecting bottom (23); The U-shaped opening of the first magnetic conductor (1) is sleeved on the static arc angle (8); the U-shaped opening of the second magnetic conductor (2) is sleeved on the dynamic arc angle (6); the U-shaped opening of the first magnetic conductor (1) and the U-shaped opening of the second magnetic conductor (2) are arranged opposite to each other; an arc extinguishing chamber (9) is arranged between the dynamic arc angle (6) and the static arc angle (8); the static arc angle (8) is connected to the static contact (7); the dynamic arc angle (6) is connected to the dynamic contact (5); the first magnetic conductor side wall 1 (11), the first magnetic conductor side wall 2 (12), the second magnetic conductor side wall 1 (21), and the second magnetic conductor side wall 2 (22) are all located between the static arc angle (8) and the dynamic arc angle (6); The first arc-isolating wall (10) is located on the same side of the first magnetic conductor side wall (11) and the second magnetic conductor side wall (21); the second arc-isolating wall (20) is located on the same side of the first magnetic conductor side wall (12) and the second magnetic conductor side wall (22); the first arc-isolating wall (10) and the second arc-isolating wall (20) are used to isolate the first magnetic conductor (1) and the second magnetic conductor (2) from the electric arc.

2. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The polarity of the first polarity surface of the first permanent magnet (3) is opposite to the polarity of the first polarity surface of the second permanent magnet (4).

3. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The symmetry planes of the first magnetic conductor (1), the first permanent magnet (3), the second magnetic conductor (2), and the second permanent magnet (4) overlap.

4. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The first magnetic conductive body side wall 1 (11) and the second magnetic conductive body side wall 1 (21) are located on the same side of the moving contact (5) and the stationary contact (7); the first magnetic conductive body side wall 2 (12) and the second magnetic conductive body side wall 2 (22) are located on the same side of the moving contact (5) and the stationary contact (7); A gap is provided between the first magnetic conductive side wall 1 (11) and the second magnetic conductive side wall 1 (21); a gap is provided between the first magnetic conductive side wall 2 (12) and the second magnetic conductive side wall 2 (22).

5. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The first magnetic conductor side wall one (11) and the first magnetic conductor side wall two (12) are both provided with a first magnetic conductor arc portion (15); the first magnetic conductor arc portion (15) extends from the moving contact (5) and the stationary contact (7) region toward the arc extinguishing chamber (9), and the first magnetic conductor arc portion (15) is connected to the first magnetic conductor connecting bottom (13) via a first magnetic conductor connecting portion (14).

6. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The second magnetic conductor side wall one (21) and the second magnetic conductor side wall two (22) are both provided with a second magnetic conductor arc portion (25), the second magnetic conductor arc portion (25) extending from the moving contact (5) and the stationary contact (7) region toward the arc extinguishing chamber (9), and the second magnetic conductor arc portion (25) is connected to the second magnetic conductor connecting bottom (23) via a second magnetic conductor connecting portion (24).

7. A double arc magnetic conductor arc blowing system according to claim 5 or 6, characterized in that: The first magnetic conductive body arc portion (15) of the first magnetic conductive body side wall 1 (11) and the first magnetic conductive body side wall 2 (12) is parallel to the arc of the static arc angle (8); and / or, The second magnetic conductive body arc-shaped portion (25) of the second magnetic conductive body side wall 1 (21) and the second magnetic conductive body side wall 2 (22) is parallel to the arc of the moving arc angle (6); and / or, The first magnetic conductive arc portion (15) of the first magnetic conductive side wall 1 (11) and the first magnetic conductive side wall 2 (12) is parallel to the curvature of the second magnetic conductive arc portion (25) of the second magnetic conductive side wall 1 (21) and the second magnetic conductive side wall 2 (22), and is parallel to the curvature of the moving arc angle (6).

8. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: The second polarity surface of the second permanent magnet (4) is in contact with the moving arc angle (6), or the second polarity surface of the second permanent magnet (4) is in contact with the moving arc angle (6) through a ferromagnet.

9. A double arc magnetic conductor arc blowing system according to claim 1, characterized in that: There is a gap along the side wall plane between the first magnetic conductive side wall 1 (11) and the first magnetic conductive side wall 2 (12) and the static arc angle (8); there is a gap along the side wall plane between the second magnetic conductive arc portion (25) of the second magnetic conductive side wall 1 (21) and the second magnetic conductive side wall 2 (22) and the dynamic arc angle (6).

10. A DC switch, characterized in that: A double-arc magnetic conductor arc blowing system comprising any one of claims 1 to 9.

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