Arc extinguishing systems and circuit breakers

Abstract

An arc extinguishing system and a circuit breaker, wherein the arc extinguishing system includes an arc extinguishing chamber coordinated with a contact system, the contact system includes a moving contact and a static contact, the arc extinguishing chamber includes two arc extinguishing chambers connected to each other, each arc extinguishing chamber is provided with at least one grid plate group, the static contact and the moving contact are spaced and opposite to each other at the arc entrance of one of the arc extinguishing chambers, and the grid plate group in the other arc extinguishing chamber is electrically connected to the moving contact at one end away from the static contact. The present invention relates to the field of low-voltage electrical appliances, and during the arc extinguishing process, the two arc extinguishing chambers are electrically connected to the moving contact and the static contact of the contact system to form a parallel structure, which can better limit the high segment current, and under the premise that the arc voltage of the two parallel arc extinguishing chambers rises sufficiently, the arc extinguishing chambers of the parallel structure have a strong short-circuit breaking performance.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to an arc extinguishing system and a circuit breaker. Background Art

[0002] Molded case circuit breaker is a low-voltage circuit protection device with functions such as overload, short circuit and undervoltage protection. Its arc extinguishing chamber is a key component for the circuit breaker to complete relevant breaking parameters. The arc extinguishing chamber is usually composed of arc extinguishing grids, side plates and gas-generating parts, which are used to limit the movement area of ​​the arc and extinguish the arc.

[0003] In existing products, the arc usually moves from one contact in the contact system to another contact, and then enters the arc extinguishing chamber under the action of magnetic blowing and air blowing to complete the arc extinguishing. This series arc extinguishing method has the following defects: First, the series arc extinguishing chambers need to add more arc extinguishing grids, which increases the size of the circuit breaker; second, due to the capacity of the arc extinguishing chamber and the internal space of the circuit breaker, it is impossible to add too many arc extinguishing grids, resulting in limited improvement in its current limiting capacity; third, the static contact is usually arranged along the outside of the arc extinguishing chamber, which is not conducive to saving internal space. Summary of the invention

[0004] The object of the present invention is to overcome at least one defect of the prior art and provide an arc extinguishing system and a circuit breaker.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides an arc extinguishing system, comprising an arc extinguishing chamber coordinated with a contact system, wherein the contact system comprises a moving contact and a stationary contact, and the arc extinguishing chamber comprises two arc extinguishing cavities connected to each other, each arc extinguishing cavity is provided with at least one grid plate group, the stationary contact and the moving contact are spaced apart and opposed to each other at an arc entrance of one of the arc extinguishing cavities, and the end of the grid plate group in the other arc extinguishing cavity away from the stationary contact is electrically connected to the moving contact.

[0007] Preferably, the static contact at least partially extends into the arc extinguishing chamber, and the two arc extinguishing chambers are respectively located on both sides of the static contact.

[0008] Preferably, the static contact is equipotentially connected with at least one static arc-starting angle, one end of the at least one static arc-starting angle is connected to the static contact, and the other end extends at least in the other arc-extinguishing chamber in which the grid group is electrically connected to the moving contact.

[0009] Preferably, the static contacts are equipotentially connected with a static arc-starting angle, one end of which is connected to the static contact, and the other end of which extends into another arc extinguishing chamber; or, the static contacts are equipotentially connected with at least two static arc-starting angles, and each arc extinguishing chamber has at least one static arc-starting angle for cooperating with a grid group.

[0010] Preferably, a second arc striking angle is also provided in another arc extinguishing chamber, and the second arc striking angle corresponds to an end of the grid group in the same arc extinguishing chamber away from the static contact and is used for electrical connection with the moving contact; or, the arc extinguishing grid at one end of the grid group in another arc extinguishing chamber away from the static contact is electrically connected with the moving contact.

[0011] Preferably, it also includes a moving arc-striking angle, wherein the moving arc-striking angle is opposite to the static contact in the same arc-extinguishing chamber, and the moving arc-striking angle is adjacent to the moving contact in the opening position.

[0012] Preferably, it also includes a first arc-striking structure connected between the grid groups of the two arc-extinguishing chambers, and at least a part of the first arc-striking structure is connected to the static contact with the same potential.

[0013] Preferably, it also includes a first arc-striking structure, which is connected between the grid groups of the two arc-extinguishing chambers, or the first arc-striking structure is connected between the grid groups of the two arc-extinguishing chambers and is connected to the static contact at the same potential.

[0014] Preferably, the static contact passes through the arc extinguishing chamber, a contact portion is provided at one end of the static contact, the contact portion extends outside the arc extinguishing chamber and is spaced opposite to the moving contact, and a hollow area connecting the two arc extinguishing chambers is provided in the middle of the static contact.

[0015] Preferably, the two arc extinguishing chambers are arranged at an angle, and the static contact is arranged at the connection between the two arc extinguishing chambers.

[0016] Preferably, the arc extinguishing chamber is L-shaped, V-shaped or U-shaped as a whole.

[0017] Preferably, the static contact passes through the arc extinguishing chamber, and two arc extinguishing chambers are respectively located on both sides of the static contact, the two arc extinguishing chambers are respectively a first arc extinguishing chamber and a second arc extinguishing chamber, and the first arc extinguishing chamber and the second arc extinguishing chamber are vertically arranged.

[0018] Preferably, the static contact is equipotentially connected with a static arc-striking angle, the static arc-striking angle at least partially extends into the first arc-extinguishing chamber, and the tail end of the static arc-striking angle extends into the second arc-extinguishing chamber; a first arc-striking structure is also provided at the connection between the first arc-extinguishing chamber and the second arc-extinguishing chamber, and the first arc-striking structure is connected between the grid groups of the two arc-extinguishing chambers.

[0019] Preferably, the first arc-striking structure includes a first arc-striking angle, the first end of the first arc-striking angle is located in the first arc-extinguishing chamber, the first end of the first arc-striking angle is spaced opposite to one end of the grid group of the first arc-extinguishing chamber, the first end of the first arc-striking angle is connected to the same potential as or spaced opposite to the static contact, and the second end of the first arc-striking angle is located in the second arc-extinguishing chamber and is spaced opposite to one end of the grid group of the second arc-extinguishing chamber.

[0020] Preferably, the first arc-striking structure includes a third arc-striking angle and a fourth arc-striking angle, and the third arc-striking angle and the fourth arc-striking angle are respectively located in the first arc-extinguishing chamber and the second arc-extinguishing chamber, one end of the third arc-striking angle is spaced opposite to one end of the grid group of the first arc-extinguishing chamber, and the other end of the third arc-striking angle is connected to the static contact with the same potential or is spaced opposite to the static contact; one end of the fourth arc-striking angle is spaced opposite to one end of the grid group of the second arc-extinguishing chamber, and the other end of the fourth arc-striking angle is connected to the static contact with the same potential or is spaced opposite to the static contact.

[0021] Preferably, the first arc-striking structure also includes a transition grid group, which includes a plurality of transition arc-extinguishing grids arranged at intervals, and the transition arc-extinguishing grid is located between the third arc-striking angle and one end of the grid group of the first arc-extinguishing cavity, and / or between the fourth arc-striking angle and one end of the grid group of the second arc-extinguishing cavity.

[0022] Preferably, the first arc-striking structure includes a transition grid group, the transition grid group includes a plurality of transition arc-extinguishing grids arranged at intervals, the transition arc-extinguishing grids are arranged in the first arc-extinguishing cavity and / or the second arc-extinguishing cavity, the transition arc-extinguishing grids adjacent to the static contact maintain the same potential as the static contact, or the transition arc-extinguishing grids adjacent to the static contact are spaced opposite to the static contact.

[0023] Preferably, a first arc-striking structure is further provided at the junction of the first arc-extinguishing chamber and the second arc-extinguishing chamber, and the first arc-striking structure is connected between the grid groups of the two arc-extinguishing chambers. The first arc-striking structure includes a transition grid group, and the transition grid group includes a plurality of transition arc-extinguishing grids arranged at intervals. The transition arc-extinguishing grids are arranged in the first arc-extinguishing chamber and / or the second arc-extinguishing chamber, and the transition arc-extinguishing grids adjacent to the static contacts maintain the same potential as the static contacts.

[0024] One of the transition arc-extinguishing grids is used as a transition connection grid, the middle part of the transition connection grid is bent to form a U-shaped structure with a clamping space, and the static contact passes through the clamping space to be connected with the transition connection grid.

[0025] The static arc-starting angle is plate-shaped as a whole, and is arranged along one side of the grid group of the second arc extinguishing chamber. The first end of the static arc-starting angle is folded back and connected to the static contact, and the width of the static arc-starting angle gradually narrows along the direction from the first end to the second end, so that the second end of the static arc-starting angle forms a static sharp angle portion.

[0026] The static contacts are equipotentially connected with a plurality of static arc-strike angles, at least one static arc-strike angle extends to the second arc-extinguishing chamber, and at least one static arc-strike angle extends to the first arc-extinguishing chamber.

[0027] The static contact is equipotentially connected with a first static arc-starting angle and a second static arc-starting angle, the first static arc-starting angle is located in a first arc-extinguishing chamber, the second static arc-starting angle is located in a second arc-extinguishing chamber, and the first static arc-starting angle, the static contact and the second static arc-starting angle are provided with a through hole for connecting the two arc-extinguishing chambers.

[0028] The first static arc-strike angle is a plate structure, one end of the first static arc-strike angle is connected to the static contact, the other end of the first static arc-strike angle extends in the first arc-extinguishing cavity and is spaced opposite to one end of the grid group of the first arc-extinguishing cavity, and a connecting hole is provided in the middle of the first static arc-strike angle;

[0029] The second static arc-striking angle includes a plate-shaped body, a connecting section is provided in the middle of the plate-shaped body, the connecting section is connected to the static contact, the area between the connecting section and the two ends of the plate-shaped body is bent at least once, so that the two ends of the plate-shaped body respectively form a first arc-striking section and a second arc-striking section, the first arc-striking section is spaced opposite to one end of the grid group in the second arc extinguishing chamber, and the second arc-striking section and the second arc-striking angle arranged in the second arc extinguishing chamber extend toward each other on the same side of the grid group in the second arc extinguishing chamber.

[0030] A second arc striking angle is provided in the second arc extinguishing chamber, and the second arc striking angle is located at an end away from the static arc striking angle. The grid group in the second arc extinguishing chamber is electrically connected to the moving contact through the second arc striking angle; or, the arc extinguishing grid at one end of the grid group in the second arc extinguishing chamber away from the static contact is electrically connected to the moving contact.

[0031] The second arc-striking angle includes a plate-like body, the middle part of which is bent so that one end of the second arc-striking angle is provided with a shunt part, and the shunt part is used to connect two conductive parts, one of which is connected to the moving contact, and the other end of the second arc-striking angle serves as the second arc-striking part.

[0032] One end of the second arc striking angle extends in the second arc extinguishing chamber to form an extension plate, and the extension plate cooperates with the first arc striking angle connected to the static contact with the same potential, and the distance between the extension plate and the first arc striking angle is less than or equal to the opening distance of the contact system.

[0033] Each arc extinguishing chamber is formed by a pair of side plates, and a pair of gas producing parts are arranged between each pair of side plates, so that the two arc extinguishing chambers form a split structure; or, the two arc extinguishing chambers share a pair of side plates, and a pair of gas producing parts are arranged between the pair of side plates, so that the two arc extinguishing chambers are an integrated structure.

[0034] The present invention further provides a circuit breaker, comprising a shell, wherein the shell is provided with an exhaust port, wherein the arc extinguishing system as described above is arranged in the shell, and at least one arc extinguishing chamber is connected to the exhaust port.

[0035] The arc extinguishing system and circuit breaker of the present invention, during the arc extinguishing process, the two arc extinguishing chambers are electrically connected with the moving contact and the static contact of the contact system to form a parallel structure, which can better limit the high segment current. Under the premise that the arc voltage of the two parallel arc extinguishing chambers rises sufficiently, the arc extinguishing chambers in the parallel structure have a stronger short-circuit breaking performance.

[0036] In addition, the static contact is at least equipotentially connected to the static arc-starting angle and / or the first arc-starting structure, and during the arc-extinguishing process, the grid groups of the two arc-extinguishing chambers are electrically connected to the static contact through the static arc-starting angle and / or the first arc-starting structure. In particular, the static arc-starting angle and the first arc-starting structure have various structures and numbers, and can be used in a wider range through any combination.

[0037] In addition, the grid group of one arc extinguishing chamber can be connected to the moving contact in the opening position through the arc extinguishing grid of the moving arc striking angle or the grid group, and the grid group of another arc extinguishing chamber can be electrically connected to the moving contact through the arc extinguishing grid of the second arc striking angle or the grid group. The connection methods are diverse and have a wide range of applications.

[0038] In addition, the static contact passes through the arc extinguishing chamber, and the two arc extinguishing cavities are respectively located on the positive and negative sides of the static contact, which is conducive to completely introducing the arc into the two arc extinguishing cavities for sufficient arc extinguishing.

[0039] In addition, the two arc-extinguishing chambers can be an integrated structure or a split structure, which has a wide range of applications and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is the principle diagram of the arc extinguishing system in the present invention;

[0041] Figure 2 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 1 ;

[0042] Figure 3 is a cross-sectional view of a first embodiment of an arc extinguishing system in the present invention;

[0043] Figure 4 It is a structural schematic diagram of the first embodiment of the arc extinguishing system of the present invention (including arc current);

[0044] Figure 5 is a cross-sectional view of a first embodiment of an arc extinguishing system in the present invention (including arc current);

[0045] Figure 6 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 7 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 3 ;

[0047] Figure 8 The structure of the first embodiment of the arc extinguishing system of the present invention is schematically shown in FIG. Figure 4 (Remove the moving contact)

[0048] Fig. 9 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 5 (Remove the moving contact);

[0049] Fig.10 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 6 ;

[0050] Fig.11 The structure of the first embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 7 ;

[0051] Fig.12 It is a structural schematic diagram of the first arc extinguishing chamber and the static contact in the first embodiment of the arc extinguishing system in the present invention;

[0052] Fig.13 It is a structural schematic diagram of the second arc extinguishing chamber and the static contact in the first embodiment of the arc extinguishing system in the present invention;

[0053] Fig.14 It is a structural schematic diagram of the static arc striking angle in the first embodiment of the arc extinguishing system in the present invention;

[0054] Fig.15 It is a structural schematic diagram of a second embodiment of the arc extinguishing system of the present invention;

[0055] Fig.16 The structure of the third embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 1 ;

[0056] Fig.17 The structure of the third embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 2 ;

[0057] Fig.18 The structure of the third embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 3 ;

[0058] Fig.19 The structure of the third embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 4 ;

[0059] Fig. 20 The structure of the fourth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 1 ;

[0060] Fig.21 The structure of the fourth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 2 ;

[0061] Fig. 22 The structure of the fourth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 3 ;

[0062] Fig.23 The structure of the fourth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 4 ;

[0063] Fig.24 The structure of the fifth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 1 ;

[0064] Fig.25 The structure of the fifth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 2 ;

[0065] Fig.26 The structure of the fifth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 3 ;

[0066] Fig. 27 The structure of the fifth embodiment of the arc extinguishing system of the present invention is shown in FIG. Figure 4 ;

[0067] Fig.28 is a structural schematic diagram of a sixth embodiment of an arc extinguishing system in the present invention;

[0068] Fig.29 is a structural schematic diagram of a seventh embodiment of an arc extinguishing system in the present invention;

[0069] Fig.30 is a schematic structural diagram of an eighth embodiment of an arc extinguishing system in the present invention;

[0070] Fig.31 2 is a schematic diagram of the structure of the static arc striking angle in the eighth embodiment of the arc extinguishing system of the present invention;

[0071] Fig.32 is a schematic structural diagram of a ninth embodiment of an arc extinguishing system in the present invention;

[0072] Fig.33 is a schematic structural diagram of a tenth embodiment of an arc extinguishing system in the present invention;

[0073] Reference numerals:

[0074] 1-arc extinguishing chamber, 11-first arc extinguishing cavity, 111-first arc entrance, 112-arc runway, 12-second arc extinguishing cavity, 13-dynamic arc striking angle, 14-static arc striking angle, 140-connecting hole, 1401-first static arc striking angle, 1402-second static arc striking angle, 14021-first arc striking section, 14022-second arc striking section, 14023-connecting section, 141-opening groove, 142-pointed corner, 143-convex hull, 15-first arc striking structure, 151-first arc striking angle, 153-third Arc striking angle, 154-fourth arc striking angle, 156-transition grid group, 1561-transition connecting grid, 1562-bent grid, 16-second arc striking angle, 161-diverter portion, 162-second arc striking portion, 163-extension plate, 17-side plate, 18-gas producing part, 191-first grid group, 192-second grid group, 2-moving contact, 3-static contact, 31-static contact plate, 311-contact portion, 312-static contact point, 313-wiring portion, 4-connecting plate, 5-current, 6-spacing. DETAILED DESCRIPTION

[0075] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the arc extinguishing system and circuit breaker of the present invention. The arc extinguishing system and circuit breaker of the present invention are not limited to the description of the following embodiments.

[0076] A circuit breaker includes a housing, an operating mechanism and at least one conductive unit are arranged in the housing, each conductive unit includes a pair of wiring terminals arranged at intervals, a contact system and an arc extinguishing system are arranged between the pair of wiring terminals, and the arc extinguishing system generally includes an arc extinguishing chamber 1, the arc extinguishing chamber 1 has at least one arc extinguishing cavity, and at least one side of the arc extinguishing cavity is open as an arc inlet for cooperating with the contact system. The contact system includes a movable contact 2 and a stationary contact 3 that cooperate with each other, the operating mechanism is connected to the movable contact 2, and the operating mechanism drives the movable contact 2 to contact or disconnect with the stationary contact 3 to realize the closing and opening of the circuit breaker, the arc extinguishing chamber 1 is used to extinguish the arc generated by the disconnection of the movable contact 2 and the stationary contact 3, and the arc extinguishing chamber 1 is connected to the exhaust port opened on the housing, so as to discharge the exhaust gas generated by the arc extinguishing. The arc extinguishing chamber 1 can have one, two or more arc extinguishing cavities, each arc extinguishing cavity is provided with at least one grid group, and each grid group includes a plurality of arc extinguishing grids arranged at intervals.

[0077] For the convenience of description, the connection direction between a pair of terminals is taken as the first direction, and the two directions perpendicular to the first direction are respectively the second direction and the third direction. Figure 2 For example, the first direction is the left-right direction, the second direction is the up-down direction, and the third direction is the direction perpendicular to the paper surface. Figure 4 , 5 The black dotted line marked with number 5 in FIG. 5 represents the current path.

[0078] like Figure 1-4As shown, the improvement of the present application lies in that the arc extinguishing chamber 1 comprises two arc extinguishing chambers interconnected with each other, each arc extinguishing chamber is provided with at least one grid plate group, the static contact 3 and the moving contact 2 are spaced apart and opposite to each other at the arc entrance of one of the arc extinguishing chambers, and the end of the grid plate group in the other arc extinguishing chamber away from the static contact 3 is electrically connected to the moving contact 2.

[0079] In this way, during the arc extinguishing process, the two arc extinguishing chambers are electrically connected to the moving contact 2 and the static contact 3 of the contact system to form a parallel structure, which can better limit the high segment current. Under the premise that the arc voltage of the two parallel arc extinguishing chambers rises sufficiently, the arc extinguishing chamber of the parallel structure has a stronger short-circuit breaking performance.

[0080] For the convenience of description, the two arc extinguishing chambers are respectively a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12. The first arc extinguishing chamber 11 has a first arc entrance port 111, and the second arc extinguishing chamber 12 has a second arc entrance port. The first arc entrance port 111 of the first arc extinguishing chamber 11 is opposite to the moving trajectory of the moving contact 2, and the end of the grid group in the second arc extinguishing chamber 12 away from the static contact 3 is electrically connected to the moving contact 2.

[0081] It should be noted that the end of the grid group in the other arc extinguishing chamber away from the static contact 3 can be directly electrically connected to the moving contact 2, or it can be indirectly electrically connected. For example, other energized elements are connected between the moving contact 2 and a wiring terminal. For example, the moving contact 2 is electrically connected to a wiring terminal through a short-circuit protection mechanism or an overload protection mechanism. At this time, the end of the grid group in the other arc extinguishing chamber away from the static contact 3 is electrically connected to the wiring terminal or the energized element (short-circuit protection mechanism or overload protection mechanism, etc.), which is also understood to be electrically connected to the moving contact 2.

[0082] See also Figure 1 , 4 -5, the moving contact 2 can swing between the opening position and the closing position, the static contact 3 is located at the junction of the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, the moving contact 2 contacts with the static contact 3 in the closing position, the opening position of the moving contact 2 is adjacent to the end of the grid group in the first arc extinguishing chamber 11 away from the static contact 3, that is, the moving trajectory of the moving contact 2 is opposite to the first arc entrance port 111 of the first arc extinguishing chamber 11, when opening, the moving contact 2 moves from the closing position to the opening position, the breaking arc enters the first arc extinguishing chamber 11, and a current path is formed between the moving contact 2 and the static contact 3, and this part is a conventional arc extinguishing method. The difference of this embodiment is that the moving contact 2 is also electrically connected to the end of the grid group in the second arc extinguishing chamber 12 away from the static contact 3. The moving contact 2 can be electrically connected to the arc extinguishing grid in the second arc extinguishing chamber 12 or electrically connected to the second arc striking angle 16 provided in the second arc extinguishing chamber 12, so that another current path will be formed in the second arc extinguishing chamber 12 between the moving contact 2 and the static contact 3 when the switch is opened.

[0083] In this way, in the arc extinguishing system of this embodiment, due to the jumping of the arc when opening the circuit, a current path is formed between the moving contact 2 and the static contact 3 through the grid group in the first arc extinguishing chamber 11, and another current path is formed between the moving contact 2 and the static contact 3 through the grid group in the second arc extinguishing chamber 12. The two arc extinguishing chambers form a parallel structure through the two current paths. The two arc extinguishing chambers are in a parallel relationship during the arc extinguishing process of the circuit, and can better limit the high-segment current. The grid groups in the two arc extinguishing chambers respectively extinguish the arcs of the two current paths, thereby improving the arc extinguishing performance, so that the arc extinguishing chambers with a parallel structure have a stronger short-circuit breaking performance.

[0084] Preferably, the static contact 3 at least partially extends into the arc extinguishing chamber 1, the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 are respectively located on both sides of the static contact 3, and the static contact 3 divides the arc extinguishing chamber 1 into two arc extinguishing chambers. Further, the static contact 3 is arranged throughout the arc extinguishing chamber 1, and the two arc extinguishing chambers are respectively located on the front and back sides of the static contact 3. A contact portion 311 is provided at one end of the static contact 3, and the contact portion 311 extends to the outside of the arc extinguishing chamber 1 and is spaced opposite to the moving contact 2. A hollow area connecting the two arc extinguishing chambers is provided in the middle of the static contact 3, so as to facilitate the electrical connection between the grid group of the two arc extinguishing chambers and the static contact 3. Of course, the static contact 3 may not be provided with a hollow area, and the static contact 3 may also be provided adjacent to the junction of the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, and does not extend into the arc extinguishing chamber 1.

[0085] Preferably, the moving contact 2 and the static contact 3 respectively introduce the arc into the arc extinguishing chamber 1 through the cooperation of the moving arc striking angle 13 and the static arc striking angle 14, and the moving arc striking angle 13 is arranged at one end of the first arc extinguishing chamber 11 away from the static contact 3, adjacent to the opening position of the moving contact 2. When the moving contact 2 moves to the opening position, it is adjacent to the moving arc striking angle 13, or contacts the moving arc striking angle 13, and the moving arc striking angle 13 introduces the arc on the moving contact 2 into the first arc extinguishing chamber 11.

[0086] The static contact 3 is equipotentially connected with at least one static arc-starting angle 14, one end of at least one static arc-starting angle 14 is connected to the static contact 3, and the other end extends at least in the other arc-extinguishing cavity to which the grid group is electrically connected to the moving contact 2, that is, the static arc-starting angle 14 is electrically connected to the static contact 3, and the tail end of the static arc-starting angle 14 extends to the second arc-extinguishing cavity 12, and the static arc-starting angle 14 introduces the arc on the static contact 3 into the second arc-extinguishing cavity 12. Of course, the middle part of the static arc-starting angle 14 can be bent to pass through the first arc-extinguishing cavity 11, and then extend to the second arc-extinguishing cavity 12, or it can directly extend from the static contact 3 to the second arc-extinguishing cavity 12. Preferably, when the number of static arc-starting angles 14 is one, the two ends of the static arc-starting angle 14 are respectively located in two arc-extinguishing chambers, one end of the static arc-starting angle 14 is connected to the static contact 3, and one end of the static arc-starting angle 14 and the static contact 3 are located in the first arc-extinguishing chamber 11, and the other end extends in another arc-extinguishing chamber (the second arc-extinguishing chamber 12), which is used to introduce the arc from the static contact 3 into the two arc-extinguishing chambers, which is conducive to quickly forming two parallel current paths and improving the arc-extinguishing efficiency. When the number of static arc-starting angles 14 is two or more, there is at least one static arc-starting angle 14 in each arc-extinguishing chamber, and each static arc-starting angle 14 cooperates with the grid group in the same arc-extinguishing chamber, that is, one static arc-starting angle 14 cooperates with the grid group in the first arc-extinguishing chamber 11, and the other static arc-starting angle 14 cooperates with the grid group in the second arc-extinguishing chamber 12, so as to introduce the arc on the static contact 3 into the first arc-extinguishing chamber 11 and the second arc-extinguishing chamber 12, respectively.

[0087] It should be noted that, as a modified embodiment, the arc extinguishing system may not be provided with the moving arc striking angle 13 or the static arc striking angle 14, and such a solution is also available in the prior art. In addition, an arc striking protrusion may also be integrally provided at the end of the moving contact 2 and / or the static contact 3, all of which belong to the protection scope of this application.

[0088] Preferably, a second arc-striking angle 16 is provided in the second arc-extinguishing chamber 12, and the second arc-striking angle 16 is located at an end away from the static arc-striking angle 14. The grid group in the second arc-extinguishing chamber 12 is electrically connected to the moving contact 2 through the second arc-striking angle 16. Of course, the grid group in the second arc-extinguishing chamber 12 can also be electrically connected to the moving contact 2 without providing the second arc-striking angle 16, that is, the arc-extinguishing grid at one end of the grid group away from the static contact 3 in the second arc-extinguishing chamber 12 is electrically connected to the moving contact 2, and can be an arc-extinguishing grid farthest from the static contact 3 in the second arc-extinguishing chamber 12 or one of the reciprocal arc-extinguishing grids.

[0089] In this way, after the two arc extinguishing chambers form a parallel structure, the static contact 3 is a current node in the parallel structure, and the electrical connection between the grid group and the moving contact 2 in the arc extinguishing chamber is another current node in the parallel structure. In this way, when the switch is opened, the two arc extinguishing chambers can form a parallel structure through the two current nodes to improve the short-circuit breaking performance. The current node refers to the place where the current of at least two paths converges, or the current is divided into at least two paths from here. In addition, the current flowing through the current node includes both the current flowing between the connection or contact between the conductors, and the arc current flowing between the adjacent conductors. That is, the current node formed by the grid group and the moving contact 2 in the arc extinguishing chamber is not necessarily located on the moving contact 2, but can also be at the wiring terminal connected to the moving contact 2, or connected to the energized element between the moving contact 2 and the wiring terminal.

[0090] Preferably, the arc extinguishing system of this embodiment is further provided with a first arc-striking structure 15 connected between the grid groups of the two arc-extinguishing chambers; when the static arc-striking angle 14 is equipotentially connected on the static contact 3, the first arc-striking structure 15 is connected between the grid groups in the two arc-extinguishing chambers, that is, the first arc-striking structure 15 can be spaced relative to the static contact 3, that is, the equipotential connection is not performed. At the same time, the first arc-striking structure 15 can also be connected to the static contact 3 at the same potential. For example, when the static arc-striking angle 14 is not set, the first arc-striking structure 15 needs to be connected to the static contact 3 at the same potential, that is, at least a partial area of ​​the first arc-striking structure 15 is connected to the static contact 3 at the same potential.

[0091] Specifically, the first arc-starting structure 15 may be an arc-starting angle and / or a transition grid group 156. The first arc-starting structure 15 may be an arc-starting angle, wherein the number of arc-starting angles may be one or two or more. When the number of arc-starting angles is one, the arc-starting angle spans two arc-extinguishing cavities. When the number of arc-starting angles is two or more, the arc-starting angles are respectively arranged in two arc-extinguishing cavities. The first arc-starting structure 15 may also be a transition grid group 156 (refer to Fig. 20 In the embodiment of the present invention, the transition grid group 156 includes a plurality of transition arc extinguishing grids, and the transition grid group 156 is preferably arranged across two arc extinguishing chambers. Of course, the arc striking angle and the transition grid group 156 can also be used in conjunction with each other to meet different product requirements and have the advantage of a wide range of applications. As another inferior embodiment, the first arc striking structure 15 may not be provided.

[0092] refer to Figure 1-4In the embodiment shown, the arc extinguishing chamber 1 of the arc extinguishing system of this embodiment includes two arc extinguishing chambers which are arranged at an angle and connected to each other, and a static contact 3 is provided at the connection between the two arc extinguishing chambers. The two arc extinguishing chambers are respectively a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12. The openings of the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 are respectively a first arc entrance opening 111 and a second arc entrance opening. The first arc entrance opening 111 of the first arc extinguishing chamber 11 is opposite to the moving trajectory of the moving contact 2 when opening and closing the switch. The first arc striking structure 15 is connected between the grid groups of the two arc extinguishing chambers. The static arc striking angle 14 is electrically connected to the static contact 3, and the static arc striking angle 14 extends toward the second arc entrance opening of the second arc extinguishing chamber 12 and extends into the second arc extinguishing chamber 12.

[0093] In this embodiment, the two arc extinguishing chambers are arranged vertically, so that the arc extinguishing chamber is approximately L-shaped as a whole, reducing the overall volume of the arc extinguishing system; of course, as other embodiments, the two arc extinguishing chambers can also be at other angles, so that the arc extinguishing chamber is V-shaped, U-shaped, or straight. In addition, in this embodiment, the static contact 3 is arranged at the corner of the L-shaped arc extinguishing chamber, that is, the static contact 3 is arranged at the connection of the two arc extinguishing chambers, and the arc extinguishing chamber 1 is divided into a first arc extinguishing chamber 11 of the vertical section and a second arc extinguishing chamber 12 of the horizontal section. As other embodiments, the static contact 3 can also be arranged at other positions to separate the arc extinguishing chamber into two arc extinguishing chambers; for example, the static contact 3 can also be arranged in the middle of the vertical section of the L-shaped arc extinguishing chamber, and the upper half of the vertical section is used as the first arc extinguishing chamber 11, and the lower half of the vertical section and the horizontal section are used as the second arc extinguishing chamber; or the static contact can also be arranged in the middle of the horizontal section of the L-shaped arc extinguishing chamber. In addition, three or more arc extinguishing chambers can be arranged as needed, but they must include the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 forming a parallel structure.

[0094] Among them, the first arc-striking structure 15, the static arc-striking angle 14 and the static contact 3 maintain equipotential connection. Of course, it can also be that only the static arc-striking angle 14 and the static contact 3 maintain equipotential connection, or it can be that only the first arc-striking structure 15 and the static contact 3 maintain equipotential connection, that is, the arc-striking angle and / or the transition grid group 156 in the first arc-striking structure 15 maintain equipotential connection with the static contact 3, and the first arc-striking structure 15 is connected between the two arc-extinguishing cavities and cooperates with the static arc-striking angle 14; the static contact 3 is arranged in the L-shaped arc-extinguishing cavity along the first direction. At the corner of the chamber, a contact portion 311 is provided at one end of the static contact 3, the contact portion 311 extends from one side of the first arc entry port 111 to the outside of the first arc extinguishing chamber 11 and is provided with a static contact 312, the static contact 312 is spaced opposite to the moving contact of the moving contact 2, and the other end of the static contact 3 extends in a direction away from the first arc entry port 111 to the outside of the first arc extinguishing chamber 11 for connection with a wiring terminal. The static contact 3 passes through the arc extinguishing chamber 1, which is convenient for cooperating with the first arc striking structure 15 and the static arc striking angle 14 to form a current node, and is also conducive to saving space.

[0095] Specifically, Fig.12, 13 As shown, the static contact 3 includes a static touch plate 31, which is arranged at the junction of the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12. The first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 are located on both sides of the static touch plate 31 of the static contact 3. One end of the static touch plate 31 extends from the first arc entrance port 111 close to the second arc extinguishing chamber 12 to the outside of the first arc extinguishing chamber 11. The static arc striking angle 14 is connected to the contact portion 311, so that the static arc striking angle 14 and the static touch plate 31 maintain an equipotential connection. The first arc striking structure 15 can be connected to the static touch plate 31, so that the first arc striking structure 15, the static contact 3 and the static arc striking angle 14 maintain an equipotential connection. Alternatively, the first arc striking structure 15 is not directly connected to the static touch plate 31, so that the other end of the static touch plate 31 extends from one end of the first arc extinguishing chamber 11 away from the first arc entrance port 111 for connection with the wiring terminal.

[0096] Combination Figure 1-14 A first embodiment of an arc extinguishing system is provided.

[0097] like Figure 1-11 As shown, the arc extinguishing system includes an arc extinguishing chamber 1 with two arc extinguishing chambers, the two arc extinguishing chambers are arranged at an angle and are interconnected, at least one grid group is arranged in each arc extinguishing chamber, one of the arc extinguishing chambers is arranged along the second direction as a first arc extinguishing chamber 11, the first arc entrance port 111 of the first arc extinguishing chamber 11 is used to cooperate with the contact system, the first arc entrance port 111 of the first arc extinguishing chamber 11 is opposite to the moving trajectory of the moving contact 2 for opening and closing, the other arc extinguishing chamber is arranged along the first direction as a second arc extinguishing chamber 12, the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 are perpendicular to each other, the first arc extinguishing chamber 11 is arranged along the second direction, the second arc extinguishing chamber 12 is arranged along the first direction, one end of the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 are interconnected, the moving contact 2 and the static contact 3 are arranged at the first arc entrance port 111 in the second direction, and the two sides of the first arc entrance port 111 are provided with a moving arc striking angle 13 and a static arc striking angle 14 respectively cooperating with the moving contact 2 and the static contact 3.

[0098] In this embodiment, the first arc extinguishing chamber 11 is a structure with openings on four sides. The opening along the length direction (second direction) of the first arc extinguishing chamber 11 is the first arc entrance port 111 of the first arc extinguishing chamber 11, and the opening along the width direction (first direction) of the first arc extinguishing chamber 11 is used to communicate with the second arc extinguishing chamber 12.

[0099] Specifically, a first grid plate group 191 is disposed in the first arc extinguishing chamber 11. The first grid plate group 191 is spaced apart from the first arc entrance opening 111 in the first direction. One end of the first grid plate group 191 away from the second arc extinguishing chamber 12 is bent and extended to one side of the first arc entrance opening 111 and connected to the moving arc ignition angle 13. Figure 1-11In the embodiment, the first grid group 191 includes a plurality of arc-extinguishing grids, some of which are arranged at intervals in the second direction, and another part of the arc-extinguishing grids are arranged at intervals along the first direction on one side of the first arc entrance port 111, and an arc-extinguishing grid closest to the first arc entrance port 111 is connected to the moving arc-strike angle 13. A second grid group 192 is arranged in the second arc-extinguishing cavity 12, and the second grid group 192 includes a plurality of arc-extinguishing grids arranged at intervals in the first direction. In the present embodiment, the arc-extinguishing grids in the first grid group 191 and the second grid group 192 are preferably arranged at an angle, and the size of the arc-extinguishing grids is set according to actual needs.

[0100] The arc extinguishing chamber 1 is also provided with a first arc-striking structure 15. In the present embodiment, the first arc-striking structure 15 includes a first arc-striking angle 151, wherein the first arc-striking angle 151 and the static arc-striking angle 14 are arranged at the connection between the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, and one end of the static arc-striking angle 14 extends along the first direction in the second arc extinguishing chamber 12 on one side of the second grid group 192, so that the first arc-striking angle 151 and the static arc-striking angle 14 span the two arc extinguishing chambers, and the second arc-striking angle 16 is provided in the second arc extinguishing chamber 12 away from the static arc-striking angle 14, that is, the second arc-striking angle 16 corresponds to one end of the grid group (second grid group 192) of the same arc extinguishing chamber (second arc extinguishing chamber 12) away from the static contact, and the second arc-striking angle 16 and the static arc-striking angle 14 are spaced opposite to each other along the first direction in the second arc extinguishing chamber 12.

[0101] In this embodiment, if Figure 1-7 As shown in FIG. 9 , the static arc striking angle 14 , the first arc striking angle 151 and the static contact 3 are connected to the same potential, and the first arc striking angle 151 and the static arc striking angle 14 extend in the second arc extinguishing chamber 12 to connect with the second grid group 192 . Fig.12 , 13 In the embodiment, a first end of the first arc-starting angle 151 is connected to the static contact 3, and a second end is spaced opposite to an end of the second grid group 192 close to the first arc extinguishing chamber 11, one end of the static arc-starting angle 14 is connected to the static contact 3, and the other end of the static arc-starting angle 14 extends along a first direction on one side of the second grid group 192, one end of the second arc-starting angle 16 is spaced opposite to an end of the second grid group 192 away from the static arc-starting angle 14, and the other end of the second arc-starting angle 16 extends along the first direction along one side of the second grid group 192, and the second arc-starting angle 16 and the static arc-starting angle 14 extend toward each other along the same side of the second grid group 192. In the present embodiment, the minimum spacing between the static arc-starting angle 14 and the second arc-starting angle 16 is less than or equal to the opening distance of the contact system, and the other end of the second arc-starting angle 16 is electrically connected to the moving contact 2.

[0102] In this embodiment, the arc extinguishing chamber 1 includes side plates 17 and gas producing parts 18 arranged in pairs, each pair of side plates 17 is spaced relative to each other to form an arc extinguishing chamber open on four sides, each pair of side plates 17 is spaced in the third direction, the gas producing parts 18 arranged in pairs are located between the pair of side plates 17, an arc runway 112 is formed between each pair of gas producing parts 18, and the arc runway 112 of the first arc extinguishing chamber 11 is connected to the arc runway 112 of the second arc extinguishing chamber 12, and the moving contact 2 moves in the arc runway 112 corresponding to the first arc inlet 111 in the direction of approaching or moving away from the static contact 3 assembly; the two side edges of each arc extinguishing grid are respectively connected to the side plates 17, for example, a protrusion is provided on the edge of the arc extinguishing grid, and the side plate 1 7 is provided with a slot that cooperates with the protrusion, and an arc-extinguishing notch is provided at one end of each arc-extinguishing grid. The arc-extinguishing notches of two adjacent arc-extinguishing grids are connected to form an arc-extinguishing channel, and legs are formed on both sides of each arc-extinguishing notch. The legs are plugged into the gas-producing part 18 and wrapped by the gas-producing part 18. When the grid group is matched with the side plate 17 and the gas-producing part 18 respectively, the arc-extinguishing grids at the head and tail ends of the grid group can partially block the openings at both ends of the side plate 17. At this time, each arc-extinguishing cavity only has openings on two sides, one of which is the first arc-extinguishing cavity 11, one side opening of the first arc-extinguishing cavity 11 is the first arc entrance 111, and the other arc-extinguishing cavity is the second arc-extinguishing cavity 12.

[0103] Furthermore, at least one notch groove is provided on the middle edge of the arc extinguishing notch, and the central axis of the notch groove deviates from the central axis of the arc extinguishing notch, so that the notch grooves of two adjacent arc extinguishing grids are staggered. Of course, the arc extinguishing grid is not provided with an arc extinguishing notch and does not have a support leg, and only a notch groove may be provided.

[0104] like Fig.11 As shown, the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 share a pair of L-shaped side plates 17, and a pair of gas-producing parts 18 are arranged between the pair of L-shaped side plates 17. The gas-producing parts 18 are also L-shaped structures, so that the two arc extinguishing chambers form an arc extinguishing chamber 1 with an integrated structure; of course, each arc extinguishing chamber is formed by a pair of side plates 17, each side plate 17 is in the shape of a rectangular plate, and a pair of gas-producing parts 18 are arranged between each pair of side plates 17, each gas-producing part 18 is approximately a rectangular structure, and its width is smaller than the width of the side plate 17, and the two arc extinguishing chambers are connected through one end to form a split arc extinguishing chamber 1. In addition, the split arc extinguishing chamber 1 can also use a pair of L-shaped gas-producing parts 18.

[0105] In addition, the arc-extinguishing grids in the first grid group 191 and the second grid group 192 are preferably arranged at an angle, and the angle thereof is set according to actual needs. In the figure, the extension direction of the arc-extinguishing grids in the first grid group 191 is slightly angled with the first direction, inclined toward the first arc entrance 111, and the extension direction of the arc-extinguishing grids in the second grid group 192 is arranged at an angle with the second direction.

[0106] In this embodiment, the distance between the side of the first arc extinguishing cavity 11 opposite to the first arc entrance port 111 and the first arc entrance port 111 is smaller than the length between the head end and the tail end of the second grid group 192, that is, the width of the first arc extinguishing cavity 11 is smaller than the length of the second arc extinguishing cavity 12. By increasing the length of the second arc extinguishing cavity 12, it is convenient to increase the number of arc extinguishing grids in the second grid group 192, which is beneficial to improving the arc extinguishing capability.

[0107] A moving arc-starting angle 13 and a static arc-starting angle 14 are arranged on opposite sides of the first arc-entry opening 111. The moving arc-starting angle 13 and the static arc-starting angle 14 are spaced opposite to each other in the second direction. The moving arc-starting angle 13 can adopt the existing technology. One end of the moving arc-starting angle 13 is parallel to and opposite to an arc-extinguishing grid of the first grid group 191 on the side adjacent to the first arc-entry opening 111, and the other end of the moving arc-starting angle 13 cooperates with the moving contact 2, that is, in the opening position, the side of the moving contact 2 facing away from the moving contact is spaced opposite to the other end of the moving arc-starting angle 13, so that the other end of the moving arc-starting angle 13 can be connected with the moving contact 2.

[0108] Combination Figure 2-14 A static arc-starting angle 14 applied to the present embodiment is provided. The static arc-starting angle 14 is in the shape of a straight plate as a whole. The static arc-starting angle 14 is arranged in the second arc-extinguishing chamber 12. The static arc-starting angle 14 is arranged along the first direction on one side of the second grid plate group 192. The first end of the static arc-starting angle 14 is folded back to form a static arc-starting portion, so that the static arc-starting angle 14 forms a U-shaped structure as a whole. The width of the static arc-starting angle 14 gradually narrows along the direction from the first end to the second end, so that the second end of the static arc-starting angle 14 forms a static sharp corner portion 142. The static sharp corner portion 142 has a certain length, which is conducive to long-distance arc starting, and is conducive to introducing the arc into the second arc-extinguishing chamber 12, thereby improving the utilization rate of the second grid plate group 192.

[0109] Preferably, an open groove 141 is provided in the middle of the plate surface of the static arc-striking angle 14, and the open groove 141 is used to shrink the arc root. Furthermore, the static sharp corner portion 142 is provided with a protruding bulge 143, and the bulge 143 faces the second grid plate group 192. The magnetic field strength at the static sharp corner portion 142 and the bulge 143 is strong, and the magnetic flux lines are dense, which is conducive to introducing the arc into the second arc extinguishing chamber 12.

[0110] Combination Figure 2-14 A contact system is provided for use with the present embodiment. The contact system comprises a rotating shaft, a moving contact 2 and a stationary contact 3, wherein the rotating shaft is rotatably arranged and is linked to an operating mechanism of a circuit breaker, one end of the moving contact 2 is connected to the rotating shaft, and the other end of the moving contact 2 is provided with a moving contact point for cooperating with the stationary contact 3. The structure of the rotating shaft and the moving contact 2 can adopt existing technology.

[0111] like Figure 2-13As shown, the static contact 3 includes a straight plate-shaped static contact plate 31, which is arranged along the connection between the two arc extinguishing chambers. In this embodiment, the static contact plate 31 penetrates the arc extinguishing chamber 1 along the first direction, and one end of the static contact plate 31 extends to one side of the first arc inlet 111 and is provided with a contact portion 311, and the contact portion 311 is provided with a static contact 312 for cooperating with the moving contact, wherein a hollow area penetrating the plate surface of the static contact plate 31 is provided, and the hollow area can be used to pass through the static arc striking angle 14, and can connect the two arc extinguishing chambers, so as to facilitate the charging. The movement and transfer of particles in the two arc extinguishing chambers extend and bend outward from one side edge of the hollow area to form a contact portion 311 parallel to the static contact plate 31. The static contact 312 is arranged on the side of the contact portion 311 facing away from the static contact plate 31. The static arc-starting portion can pass through the hollow area to connect with the contact portion 311, so that the edge of the static arc-starting portion is connected with the edge of the static contact 312. The other end of the static touch plate 31 extends to the outside of the first arc extinguishing chamber 11 as a wiring portion 313. The wiring portion 313 is provided with a wiring hole for connecting with an adjacent wiring terminal.

[0112] Combination Figure 2-14 A first arc-striking angle 151 applied to the present embodiment is provided. The first arc-striking angle 151 is a plate-like body bent in the middle, so that the second end of the first arc-striking angle 151 is spaced apart from one end of the second grid group 192 close to the first arc extinguishing chamber 11, and the first end of the first arc-striking angle 151 passes through the hollow area to be connected to the static touch plate 31, and the first end of the first arc-striking angle 151 passes through the hollow area and is connected to the side away from the contact portion 311.

[0113] Combination Figure 2-7 , 11 and 13 provide a second arc striking angle 16 applied to the present embodiment, the second arc striking angle 16 comprises a plate-like body, the middle part of the plate-like body is bent so that the plate-like body is V-shaped as a whole, wherein one end of the plate-like body serves as a diversion portion 161 of the second arc striking angle 16, Fig.12 , 13 The middle shunt portion 161 and the static sharp corner portion 142 of the static arc-starting angle 14 extend along the same side of the second grid group 192. The shunt portion 161 is provided with a wiring hole. The shunt portion 161 can be used to simultaneously connect two conductive parts, so that the connection between the shunt portion 161 and the conductive part forms a shunt node, one of which is used to connect to the moving contact 2, that is, in this embodiment, the connecting plate 4 connected to the moving contact 2 is used as a conductive part connected to the shunt portion 161, and the other conductive part is used to connect to the wiring terminal. The conductive part can be a conductive plate connected to the short-circuit protection mechanism in the circuit breaker, and the other end of the plate-like body serves as the second arc-starting portion 162. The second arc-starting portion 162 is spaced opposite to one end of the second grid group 192, and the second arc-starting portion 162 can be considered as an arc-extinguishing grid in the second grid group 192.

[0114] Of course, you can also Figure 7As shown, the shunt portion 161 is connected to one end of a conductive member, and the other end of the conductive member is connected to the connecting plate 4 connected to the moving contact 2. It should be noted that the electrical connection between the second arcing angle 16 and the moving contact 2 is not limited to the above description.

[0115] Combination Figure 4 , 5 Briefly describe the arc extinguishing principle of the arc extinguishing chamber 1. When the current flows between the two terminals, the terminal connected to the moving contact 2 is the incoming terminal, and the terminal connected to the stationary contact 3 is the outgoing terminal. When the circuit breaker is closed normally, the current passes through the connecting plate 4 → moving contact 2 → contact part 311 → stationary contact plate 31 in sequence.

[0116] Assuming that a high breaking current (short circuit) flows through the incoming terminal, after the current flows in from the incoming terminal, the moving contact 2 and the static contact 3 will separate quickly and an arc will be generated between the two. The arc gradually enters the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12. Figure 4 The diagram shows the initial movement process of the arc. At the connection between the connecting plate 4 and the shunt portion 161 of the second arc-starting angle 16, the current is divided into two paths. The first path is: the current passes through the connecting plate 4 → the moving contact 2 → the first grid plate group 191 in the first arc-extinguishing chamber 11 → the contact portion 311 → the stationary contact plate 31 in sequence. The second path is: the current passes through the second arc-starting angle 16 → the second grid plate group 192 in the second arc-extinguishing chamber 12 → the contact portion 311 → the stationary contact plate 31 in sequence. It can be seen that the two current paths finally converge at the stationary contact plate 31 of the stationary contact 3 and then flow to the outlet terminal.

[0117] like Figure 5 As shown, the arc moves further under the action of electromagnetic force and air blowing force, and the current is also divided into two paths. The convergence point of the two paths jumps from the contact portion 311 of the static contact 3 to the connection between the first arcing angle 151 and the static contact plate 31, wherein the first path is: the current passes through the connecting plate 4→moving contact 2→the first grid group 191 in the first arc extinguishing chamber 11→the connection between the first arcing angle 151 and the static contact plate 31→the static contact plate 31 in sequence, and the second path is: the second arcing angle 16→the second grid group 192 in the second arc extinguishing chamber 12→the connection between the first arcing angle 151 and the static contact plate 31→the static contact plate 31. It can be seen that the current is divided at the connection between the second arcing angle 16 and the connecting plate 4, and finally converges through the static contact plate 31, realizing the parallel connection of the two arc extinguishing chambers, which can better limit the high breaking current. Under the premise that the arc voltage of each parallel arc extinguishing chamber 1 rises sufficiently, the parallel structure has a higher short-circuit breaking performance.

[0118] In addition, in this embodiment, the second arc starting angle 16 may not be set. Fig. 9 , 10As shown, one end of the grid group in the second arc extinguishing chamber 12 away from the static arc striking angle 14 is electrically connected to the moving contact 2, that is, some arc extinguishing grids at one end of the second grid group 192 away from the first arc extinguishing chamber 11 are arranged in a fan shape at intervals, and one of the arc extinguishing grids is connected to the connecting plate 4 connected to the moving contact 2. At this time, the connection between the arc extinguishing grid and the connecting plate 4 serves as a shunt node. This structure is beneficial to increasing the number of arc extinguishing grids in the second arc extinguishing chamber 12 and improving the arc extinguishing effect.

[0119] As another structure of this embodiment, the first arc striking angle 151 may not be connected to the static contact 3 at the same potential, and only the static arc striking angle 14 may be connected to the static contact 3 at the same potential. Figure 8 , 10 As shown, the first end of the first arc-striking angle 151 is located in the first arc-extinguishing chamber 11, the first end of the first arc-striking angle 151 is spaced opposite to one end of the grid group of the first arc-extinguishing chamber 11, the first end of the first arc-striking angle 151 is spaced opposite to the static contact 3, and the second end of the first arc-striking angle 151 is located in the second arc-extinguishing chamber 12 and is spaced opposite to one end of the grid group of the second arc-extinguishing chamber 12. The arc extinguishing principle thereof refers to the above description.

[0120] Combination Figure 1 , 15 A second embodiment of an arc extinguishing system is provided, wherein the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 which are perpendicular to each other and connected at one end, the second arc extinguishing chamber 12, the contact system, the static arc striking angle 14, and the first arc striking structure 15 are the same as those of the first embodiment. The difference from the first embodiment is that the dynamic arc striking angle 13 is not arranged in the first arc extinguishing chamber 11, some arc extinguishing grids in the first grid group 191 are arranged at intervals along the second direction, and another part of the arc extinguishing grids extend along the first direction on one side of the first arc entrance port 111 and are connected to the moving contact 2 in the opening position.

[0121] The parallel working principle of the two arc extinguishing chambers in this embodiment is the same as that in the first embodiment.

[0122] Combination Figure 1 , 16 -19 provides a third embodiment of the arc extinguishing system.

[0123] In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 with two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 that are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, a contact system and a static arc striking angle 14 connected to the static contact 3 also adopt the same structure as those in the first embodiment. The difference from the first embodiment is that the first arc striking structure 15 includes a third arc striking angle 153 and a fourth arc striking angle 154, the third arc striking angle 153 and the fourth arc striking angle 154 are respectively arranged in the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, and the third arc striking angle 153, the fourth arc striking angle 154 and the static contact 3 maintain equipotential connection. In the figure, the third arc striking angle 153 is a V-shaped or U-shaped plate structure, and one end of the third arc striking angle 153 is connected to the static contact plate 31 in the first arc extinguishing chamber 11 (see Fig.16 , 19 ), or, one end of the third arcing angle 153 is spaced opposite to the static contact 3 in the first arc extinguishing chamber 11 (see Fig.17 , 18 ), the other end of the third arc-starting angle 153 is spaced opposite to one end of the first grid group 191 close to the second arc-extinguishing cavity 12, which can also be understood as that the other end of the third arc-starting angle 153 is spaced opposite to an arc-extinguishing grid at the tail end of the first grid group 191; the fourth arc-starting angle 154 is a V-shaped plate structure, and its shape and structure can refer to the second arc-starting angle 16 in the first embodiment, and one end of the fourth arc-starting angle 154 is connected to the static touch plate 31 in the second arc-extinguishing cavity 12 (see Fig.16 , 18 ), or, one end of the fourth arcing angle 154 is spaced opposite to the static contact 3 in the second arc extinguishing chamber 12 (see Fig.17 , 19 ), the other end of the fourth arc starting angle 154 is spaced apart from one end of the second grid plate group 192.

[0124] It should be noted that when the third arc-striking angle 153 and the fourth arc-striking angle 154 are spaced relative to the static contact 3, the distance between the third arc-striking angle 153 and the static contact 3 is less than or equal to the distance between two adjacent arc-extinguishing grids in the grid group in the first arc-extinguishing chamber 11, and the distance between the fourth arc-striking angle 154 and the static contact 3 is less than or equal to the distance between two adjacent arc-extinguishing grids in the grid group in the second arc-extinguishing chamber 12.

[0125] In addition, when the static arcing angle 14 is not connected to the static contact 3 at the same potential, it can also be understood that when the static arcing angle 14 does not exist, it is preferred that at least one of the third arcing angle 153 and the fourth arcing angle 154 is connected to the static contact 3 at the same potential.

[0126] The working principle of this embodiment is similar to that of the first embodiment, that is, when current flows between two terminals, the terminal connected to the moving contact 2 is the incoming terminal, and the terminal connected to the stationary contact 3 is the outgoing terminal.

[0127] Assuming that a high breaking current flows through the incoming terminal, after the current flows in from the incoming terminal, it is divided into two paths at the connection point between the connecting plate 4 and the shunt portion 161 of the second arc-starting angle 16, wherein the first path is: the current sequentially passes through the connecting plate 4 → the moving contact 2 → the first grid plate group 191 in the first arc-extinguishing chamber 11 → the contact portion 311 → the stationary contact plate 31, and the second path is: the current sequentially passes through the second arc-starting angle 16 → the second grid plate group 192 in the second arc-extinguishing chamber 12 → the contact portion 311 → the stationary contact plate 31. It can be seen that the two current paths finally converge at the stationary contact 3 and flow to the outgoing terminal; when the arc is under the electromagnetic force and the air blowing force Under the action of , the current further moves, and the current is also divided into two paths, wherein the first path is: the current passes through the connecting plate 4 → the moving contact 2 → the first grid group 191 in the first arc extinguishing chamber 11 → the connection between the third arc ignition angle 153, the fourth arc ignition angle 154 and the static touch plate 31 → the static touch plate 31, and the second path is: the second arc ignition angle 16 → the second grid group 192 in the second arc extinguishing chamber 12 → the connection between the third arc ignition angle 153, the fourth arc ignition angle 154 and the static touch plate 31 → the static touch plate 31. It can be seen that the current is divided at the connection between the second arc ignition angle 16 and the connecting plate 4, and finally converges through the static touch plate 31.

[0128] Combination Figure 1 , 20 -23 provides a fourth embodiment of the arc extinguishing system.

[0129] In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 that are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, a contact system and a static arc striking angle 14 connected to the static contact 3 also adopt the same structure as those in the first embodiment, and the difference from the first embodiment is that the first arc striking structure 15 includes a third arc striking angle 153, a fourth arc striking angle 154 and a transition grid group 156, the third arc striking angle 153 and the fourth arc striking angle 154 are respectively arranged in the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, the third arc striking angle 153 and the fourth arc striking angle 154 are respectively connected to the static contact plate 31 with the same potential, that is, the third arc striking angle 153 and the fourth arc striking angle 154 are connected to the static contact plate 31 (see Fig. 20 );like Fig. 22As shown, only the fourth arc striking angle 154 is connected to the stationary touch plate 31, the third arc striking angle 153 is spaced and opposite to the stationary touch plate 31, and the gap between the third arc striking angle 153 and the stationary touch plate 31 is less than or equal to the gap between two adjacent arc extinguishing grids in the grid group in the first arc extinguishing cavity; Fig.23 As shown, only the third arc striking angle 153 is connected to the stationary touch plate 31, and the fourth arc striking angle 154 is spaced and opposite to the stationary touch plate 31, and the gap between the fourth arc striking angle 154 and the stationary touch plate 31 is less than or equal to the gap between two adjacent arc extinguishing grids in the grid group in the second arc extinguishing chamber 12; of course, as Fig.21 As shown, it is also possible that neither the third arc striking angle 153 nor the fourth arc striking angle 154 contacts the stationary contact plate 31 .

[0130] When the static arc striking angle 14 is not connected to the static contact 3 at the same potential, that is, when the static arc striking angle 14 does not exist, at least one of the third arc striking angle 153 and the fourth arc striking angle 154 needs to be connected to or in contact with the static contact 3 at the same potential.

[0131] The transition grid group 156 includes a plurality of transition arc extinguishing grids, which may all be arranged in the first arc extinguishing cavity 11, or all be arranged in the second arc extinguishing cavity 12, or the plurality of transition arc extinguishing grids may be divided into two parts and respectively arranged in the first arc extinguishing cavity 11 and the second arc extinguishing cavity 12, and the transition arc extinguishing grids are used to connect between the third arc ignition angle 153 and the first grid group 191, and / or, connect between the fourth arc ignition angle 154 and the second grid group 192. Preferably, the arc extinguishing grids of the transition grid group 156 close to the stationary touch plate 31 may be arranged in a fan-shaped structure at intervals. Of course, when the third arc ignition angle 153 and the fourth arc ignition angle 154 exist in this embodiment, the transition grid group 156 may also be omitted.

[0132] The parallel connection principle of the two arc extinguishing chambers in this embodiment can refer to the third embodiment.

[0133] Combination Figure 1 , 24 -27 provides a fifth embodiment of the arc extinguishing system.

[0134] In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 with two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 which are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, and a contact system and a static arc striking angle 14 connected to the static contact 3 also adopt the same structure as those in the first embodiment. The difference from the first embodiment is that the first arc striking structure 15 includes a transition grid group 156, and the transition grid group 156 includes a plurality of transition arc extinguishing grids arranged at intervals. The transition arc extinguishing grids are respectively arranged in the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12, and the transition arc extinguishing grids adjacent to the static contact 3 maintain the same potential as the static contact 3 and the static arc striking angle 14.

[0135] In this embodiment, one of the transition arc extinguishing grids serves as the transition connecting grid 1561, and the middle part of the transition connecting grid 1561 is bent to form a U-shaped structure with a clamping space, and the static contact plate 31 is clamped in the clamping space. Specifically, the two clamping arms on both sides of the clamping space can pass through the hollow area of ​​the static contact plate 31 to clamp the static contact plate 31, and finally the static contact 3 passing through the clamping space is connected to the transition grid group 156, thereby ensuring the equipotential connection with the static touch plate 31 and the static arc starting angle 14.

[0136] When the static arc-starting angle 14 and the static contact 3 are connected or contacted with the same potential, the two clamping arms in the transition connection grid 1561 may not be connected with the static contact 3 with the same potential (see Fig.25 ), or, only one clamping arm is connected to the fixed contact 3 with the same potential (see Fig.26 , 27 ); When the static arc-starting angle 14 is not connected or in contact with the static contact 3 at the same potential, that is, when the static arc-starting angle 14 does not exist, at least one clamping arm in the transition connection grid 1561 needs to be connected to the static contact 3 at the same potential.

[0137] The working principle of this embodiment can refer to the third embodiment, and the transition connecting grid 1561 is similar to the third arc-starting angle 153 and the fourth arc-starting angle 154 .

[0138] Combination Figure 1 , 28 A sixth embodiment of an arc extinguishing system is provided. In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 that are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, a contact system and a static arc striking angle 14 connected to the static contact 3 also adopt the same structure as those in the first embodiment, and the difference from the first embodiment is that the first arc striking structure 15 includes a transition grid group 156, and the transition grid group 156 is connected between the first grid group 191 and the second grid group 192. Between the plate groups 192, a transition grid group 156 is connected between the grid groups of the two arc extinguishing chambers to form a loop. The transition grid group 156 cooperates with the static arc-strike angle 14 and is not connected to the static contact 3 at the same potential. Only the static contact 3 maintains the same potential connection with the static arc-strike angle 14, but the gap between the transition grid group 156 and the static contact plate 31 can allow current to flow through. The transition grid group 156 includes a plurality of transition arc-extinguishing grids arranged at intervals, wherein some of the transition arc-extinguishing grids are arranged at intervals in the first arc-extinguishing chamber 11, and another part of the transition arc-extinguishing grids are arranged at intervals to form a fan-shaped structure and are arranged in the second arc-extinguishing chamber 12.

[0139] In this embodiment, after the current flows into the terminal, it is still divided into two paths at the connection between the connecting plate 4 and the shunt portion 161 of the second arc starting angle 16. The currents of the two paths are finally gathered at the stationary contact plate 31 through the contact portion 311; the arc current flows to the transition grid group 156 under the cooperation of magnetic blowing and air blowing.

[0140] Combination Figure 1 , 28 Briefly describing the working principle of the arc extinguishing chamber 1, when current flows between two terminals, the terminal connected to the moving contact 2 is the incoming terminal, and the terminal connected to the stationary contact 3 is the outgoing terminal.

[0141] After the current flows in from the incoming terminal, it is divided into two paths at the connection between the connecting plate 4 and the shunt portion 161 of the second arc-starting angle 16, wherein the first path is: the current sequentially passes through the connecting plate 4→moving contact 2→the first grid plate group 191 in the first arc-extinguishing chamber 11→the contact portion 311→the stationary contact plate 31, and the second path is: the current sequentially passes through the second arc-starting angle 16→the second grid plate group 192 in the second arc-extinguishing chamber 12→the contact portion 311→the stationary contact plate 31. It can be seen that the two current paths finally converge at the stationary contact 3 and flow to the outgoing terminal; when the arc moves further under the action of the electromagnetic force and the air blowing force, the current is also divided into two paths, which The first path is: the current passes through the connecting plate 4 → the moving contact 2 → the first grid group 191 in the first arc extinguishing chamber 11 → the transition grid group 156 located in the first arc extinguishing chamber 11 → the contact portion 311 → the static touch plate 31, and the second path is: the second arc striking angle 16 → the second grid group 192 in the second arc extinguishing chamber 12 → the transition grid group 156 located in the second arc extinguishing chamber 12 → the contact portion 311 → the static touch plate 31. It can be seen that in this embodiment, the transition grid group 156 and the static touch plate 31 are not connected to the same potential, only the static arc striking angle 14 and the static touch plate 31 maintain the same potential, but the two arc extinguishing chambers still belong to a parallel structure.

[0142] Combination Figure 1 , 29 A seventh embodiment of an arc extinguishing system is provided,

[0143] In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 with two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 which are the same as those in the sixth embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, a contact system and a static arc striking angle 14 connected to the static contact 3 also adopt the same structure as those in the first embodiment, and the first arc striking structure 15 also adopts a transition grid group 156. The difference from the sixth embodiment is that the transition grid group 156 includes a plurality of transition arc extinguishing grids arranged at intervals, and some of the transition arc extinguishing grids are arranged at intervals in the first arc extinguishing chamber 11, one of the transition arc extinguishing grids is used as a bent grid 1562, and the bent grid 1562 is L-shaped as a whole. One end of the bent grid 1562 is located in the first arc extinguishing chamber 11, and the other end extends into the second arc extinguishing chamber 12 and is spaced opposite to one end of the grid group of the second arc extinguishing chamber 12.

[0144] The working principle of this embodiment refers to the sixth embodiment.

[0145] Combination Figure 1 , 30 and 31 provide an eighth embodiment of the arc extinguishing system.

[0146] In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 that are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, and a contact system that also adopts the same structure as that in the first embodiment. The difference from the first embodiment is that this embodiment only includes a static arc striking angle 14, and in this embodiment, the number of the static arc striking angles 14 is two, and the two The static arc-starting angle 14 is evenly connected to the static contact 3 at an equal potential, and each static arc-starting angle 14 extends in an arc-extinguishing cavity. For the convenience of description, the two static arc-starting angles 14 are respectively a first static arc-starting angle 1401 and a second static arc-starting angle 1402. The first static arc-starting angle 1401 is located in the first arc-extinguishing cavity 11, and the second static arc-starting angle 1402 is located in the second arc-extinguishing cavity 12, and the first static arc-starting angle 1401, the static contact 3 and the second static arc-starting angle 1402 are provided with a through hole for connecting the two arc-extinguishing cavities.

[0147] Specifically, the first arc-striking structure 15 is a second static arc-striking angle 1402, and corresponding connected connecting areas are provided in the middle of the second static arc-striking angle 1402, the first static arc-striking angle 1401 and the static contact 3 for facilitating the movement and transfer of charged particles, wherein the connecting area on the static contact 3 is a hollow area.

[0148] like Fig.30 , 31As shown, the first static arc-starting angle 1401 includes a plate-shaped structure, the middle part of the plate-shaped structure is bent, so that the first static arc-starting angle 1401 is Z-shaped as a whole, one end of the first static arc-starting angle 1401 is connected to the contact portion 311 and connected to the edge of the static contact 312, the other end of the first static arc-starting angle 1401 extends along the static contact plate 31 in the first arc extinguishing cavity 11, the first static arc-starting angle 1401 extends to one end of the first arc extinguishing cavity 11 and is electrically connected to the static contact plate 31, and the first static arc-starting angle 1401 is spaced opposite to one end of the grid group in the first arc extinguishing cavity 11, the area connected between the two ends of the first static arc-starting angle 1401 is inclined opposite to the static contact plate 31, and is provided with a connecting hole 140 corresponding to the hollow area of ​​the static contact 3.

[0149] like Fig.30 , 31 As shown, the second static arc-striking angle 1402 includes a plate-shaped body, a connecting section 14023 is provided in the middle of the plate-shaped body, and the connecting section 14023 is connected to the static contact 3. In the figure, the connecting section 14023 is connected to the contact portion 311 facing away from the static contact 312, and the area between the connecting section 14023 and the two ends of the plate-shaped body is bent at least once, so that the two ends of the plate-shaped body form a first arc-striking section 14021 and a second arc-striking section 14022 respectively, wherein the first arc-striking section 14021 and the second arc-extinguishing cavity One end of the grid group in 12 is spaced opposite to each other, and the area between the first arc-starting segment 14021 and the connecting segment 14023 is inclined opposite to the static touch plate 31, and a connecting hole 140 corresponding to the hollow area is provided in its inclined area, and the second arc-starting segment 14022 and the second arc-starting angle 16 extend toward each other on the same side of the grid group in the second arc extinguishing chamber 12. The first arc-starting segment 14021 and the second arc-starting segment 14022 can refer to the structure of the first arc-starting angle 151 and the static arc-starting angle 14 in the first embodiment.

[0150] In this embodiment, the arc moves on a first static arc striking angle 1401 in the first arc extinguishing chamber 11, and the arc moves on a second static arc striking angle 1402 in the second arc extinguishing chamber 12. During the arc extinguishing process, the parallel connection principle of the two arc extinguishing chambers refers to the first embodiment.

[0151] Combination Figure 1 , 32 A ninth embodiment of an arc extinguishing system is provided. In this embodiment, the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 which are the same as those in the first embodiment, a dynamic arc striking angle 13 in the first arc extinguishing chamber 11, a second arc striking angle 16 in the second arc extinguishing chamber 12, a contact system and a first arc striking angle 151 connected between the two arc extinguishing chambers also adopt the same structure as those in the first embodiment. Different from the first embodiment, a static arc striking angle 14 is no longer provided in this embodiment, that is, only the first arc striking angle 151 maintains an equipotential connection with the static contact 3.

[0152] The arc extinguishing principle of this embodiment is similar to that of the first embodiment. The current is split into two paths at the shunt portion 161 and finally converges on the static contact 3 .

[0153] Combination Fig.33 A tenth embodiment of an arc extinguishing system is provided, wherein the arc extinguishing system includes an arc extinguishing chamber 1 having two arc extinguishing chambers, that is, the arc extinguishing chamber 1 includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 which are the same as those of the first embodiment, a moving arc striking angle 13 in the first arc extinguishing chamber 11, a contact system and a first arc striking angle 151 connected between the two arc extinguishing chambers also adopt the same structure as those of the ninth embodiment, and the difference from the previous embodiment is that a second arc striking angle 16 is arranged in the second arc extinguishing chamber 12.

[0154] like Figure 1 , 33 As shown, the second arc-starting angle 16 includes a plate-like body bent in the middle, so that the plate-like body is V-shaped as a whole, wherein a shunt portion 161 of the second arc-starting angle 16 is provided at one end of the plate-like body, and the shunt portion 161 is provided with a wiring hole, and the shunt portion 161 can be used to simultaneously connect two conductive members, so that the connection between the shunt portion 161 and the conductive member forms a shunt node, and one of the conductive members is used to connect to the moving contact 2, that is, in this embodiment, the connecting plate 4 connected to the moving contact 2 serves as a conductive member and the shunt portion 161 is connected, and another conductive member is used to connect with the wiring terminal. The conductive member can be a conductive plate connected to the short-circuit protection mechanism in the circuit breaker. In the figure, one end of the shunt portion 161 is extended in the second arc extinguishing chamber 12 to form an extension plate 163. The extension plate 163 can replace the portion of the static arc ignition angle 14 in the first embodiment extending in the second arc extinguishing chamber 12. The extension plate 163 extends to the side of the contact portion 311 facing away from the static contact 312. The distance between the extension plate 163 and the first arc ignition angle 151 is ( Fig.33 The other end of the plate-like body serves as a second arc-starting portion 162, which is spaced opposite to one end of the second grid group 192. The second arc-starting portion 162 can be considered as an arc-extinguishing grid in the second grid group 192.

[0155] The arc extinguishing principle of this embodiment refers to the first embodiment. The current is split into two paths at the shunt portion 161 and finally converges on the static contact 3.

[0156] In addition, in the above embodiments, the specifications of the arc extinguishing grids of the first grid group 191 and the second grid group 192 and the transition arc extinguishing grids in the transition grid group 156 belong to the prior art and can be the same or adjusted according to actual applications.

[0157] The circuit breaker comprises a shell, in which the arc extinguishing system in the above embodiment is arranged. Correspondingly, an exhaust port is opened on the shell. The number of the exhaust ports can be one, two or more. At least one arc extinguishing chamber is connected to the exhaust port. Preferably, each arc extinguishing chamber corresponds to an exhaust port.

[0158] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0159] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An arc extinguishing system, comprising an arc extinguishing chamber (1) cooperating with a contact system, wherein the contact system comprises a moving contact (2) and a stationary contact (3), characterized in that: The arc extinguishing chamber (1) comprises two arc extinguishing chambers which are interconnected, each arc extinguishing chamber being provided with at least one grid plate group, and the static contact (3) being provided at the connection between the two arc extinguishing chambers; the two arc extinguishing chambers are respectively a first arc extinguishing chamber (11) and a second arc extinguishing chamber (12); the static contact (3) and the moving contact (2) are spaced and opposite to each other at the arc entrance of the first arc extinguishing chamber (11); an end of the grid plate group in the second arc extinguishing chamber (12) which is away from the static contact (3) is electrically connected to the moving contact (2), so that when the switch is opened, a current path is formed between the moving contact (2) and the static contact (3) through the grid plate group in the first arc extinguishing chamber (11), and another current path can be formed between the moving contact (2) and the static contact (3) through the grid plate group in the second arc extinguishing chamber (12); and the two arc extinguishing chambers form a parallel structure through the two current paths.

2. The arc extinguishing system according to claim 1, characterized in that: The stationary contact (3) at least partially extends into the arc extinguishing chamber (1), and the two arc extinguishing chambers are respectively located on two sides of the stationary contact (3).

3. The arc extinguishing system according to claim 2, characterized in that: The static contact (3) is equipotentially connected to at least one static arc striking angle (14), one end of the at least one static arc striking angle (14) being connected to the static contact (3) and the other end extending at least within a second arc extinguishing chamber (12) in which the grid group is electrically connected to the moving contact (2).

4. The arc extinguishing system according to claim 3, characterized in that: The static contact (3) is equipotentially connected to a static arc-starting angle (14), one end of the static arc-starting angle (14) is connected to the static contact (3), and the other end of the static arc-starting angle (14) extends into the second arc-extinguishing chamber (12); or, the static contact (3) is equipotentially connected to at least two static arc-starting angles (14), and each arc-extinguishing chamber has at least one static arc-starting angle (14) for cooperating with a grid assembly.

5. The arc extinguishing system according to claim 1, characterized in that: A second arc striking angle (16) is also provided in the second arc extinguishing cavity (12), and the second arc striking angle (16) corresponds to an end of a grid piece group in the same arc extinguishing cavity away from the stationary contact (3) and is used for being electrically connected to the moving contact (2); or, the arc extinguishing grid piece at one end of the grid piece group in the second arc extinguishing cavity (12) away from the stationary contact (3) is electrically connected to the moving contact (2).

6. The arc extinguishing system according to claim 1, characterized in that: It also includes a moving arc-starting angle (13), the moving arc-starting angle (13) and the static contact (3) are spaced opposite to each other in the first arc-extinguishing chamber (11), and the moving arc-starting angle (13) is adjacent to the moving contact (2) in the opening position, and when the moving contact (2) moves to the opening position, it is adjacent to the moving arc-starting angle (13) or in contact with the moving arc-starting angle (13).

7. The arc extinguishing system according to claim 1, characterized in that: It also comprises a first arc striking structure (15) connected between the grid plate groups of the two arc extinguishing chambers, wherein at least a part of the first arc striking structure (15) is connected to the static contact (3) at an equipotential level.

8. The arc extinguishing system according to claim 3 or 4, characterized in that: It also comprises a first arc striking structure (15), wherein the first arc striking structure (15) is connected between the grid sheet groups of the two arc extinguishing chambers, or the first arc striking structure (15) is connected between the grid sheet groups of the two arc extinguishing chambers and is connected to the static contact (3) at the same potential.

9. The arc extinguishing system according to claim 2, characterized in that: The stationary contact (3) passes through the arc extinguishing chamber (1); a contact portion (311) is provided at one end of the stationary contact (3); the contact portion (311) extends outside the arc extinguishing chamber (1) and is spaced apart from the moving contact (2); a hollow area connecting the two arc extinguishing chambers is provided in the middle of the stationary contact (3).

10. The arc extinguishing system according to claim 1, characterized in that: The two arc extinguishing chambers are arranged at an angle.

11. The arc extinguishing system according to claim 10, characterized in that: The arc extinguishing chamber is L-shaped, V-shaped or U-shaped as a whole.

12. The arc extinguishing system according to claim 1, characterized in that: The stationary contact (3) passes through the arc extinguishing chamber (1), the two arc extinguishing chambers are respectively located on both sides of the stationary contact (3), and the first arc extinguishing chamber (11) and the second arc extinguishing chamber (12) are arranged vertically.

13. The arc extinguishing system according to claim 1 or 12, characterized in that: The static contact (3) is equipotentially connected to a static arc striking angle (14), the static arc striking angle (14) at least partially extending into the first arc extinguishing chamber (11), and the tail end of the static arc striking angle (14) extending into the second arc extinguishing chamber (12); a first arc striking structure (15) is also provided at the connection between the first arc extinguishing chamber (11) and the second arc extinguishing chamber (12), the first arc striking structure (15) being connected between grid groups of the two arc extinguishing chambers.

14. The arc extinguishing system according to claim 13, characterized in that: The first arc-striking structure comprises a first arc-striking angle (151), a first end of the first arc-striking angle (151) being located in the first arc-extinguishing chamber (11), the first end of the first arc-striking angle (151) being spaced opposite to one end of a grid sheet group of the first arc-extinguishing chamber (11), the first end of the first arc-striking angle (151) being equipotentially connected to or spaced opposite to a stationary contact (3), and a second end of the first arc-striking angle (151) being located in the second arc-extinguishing chamber (12) and spaced opposite to one end of a grid sheet group of the second arc-extinguishing chamber (12).

15. The arc extinguishing system according to claim 13, characterized in that: The first arc-striking structure comprises a third arc-striking angle (153) and a fourth arc-striking angle (154); the third arc-striking angle (153) and the fourth arc-striking angle (154) are respectively located in the first arc-extinguishing chamber (11) and the second arc-extinguishing chamber (12); one end of the third arc-striking angle (153) is spaced opposite to one end of a grid sheet group of the first arc-extinguishing chamber (11), and the other end of the third arc-striking angle (153) is connected to the static contact (3) at an equal potential or is spaced opposite to the static contact (3); one end of the fourth arc-striking angle (154) is spaced opposite to one end of a grid sheet group of the second arc-extinguishing chamber (12), and the other end of the fourth arc-striking angle (154) is connected to the static contact (3) at an equal potential or is spaced opposite to the static contact (3).

16. The arc extinguishing system according to claim 15, characterized in that: The first arc-striking structure further comprises a transition grid group (156), the transition grid group (156) comprising a plurality of transition arc-extinguishing grids arranged at intervals, the transition arc-extinguishing grids being located between the third arc-striking angle (153) and one end of the grid group of the first arc-extinguishing cavity (11), and / or between the fourth arc-striking angle (154) and one end of the grid group of the second arc-extinguishing cavity (12).

17. The arc extinguishing system according to claim 13, characterized in that: The first arc-striking structure (15) comprises a transition grid group (156), the transition grid group (156) comprising a plurality of transition arc-extinguishing grids arranged at intervals, the transition arc-extinguishing grids being arranged in the first arc-extinguishing cavity (11) and / or the second arc-extinguishing cavity (12), the transition arc-extinguishing grids adjacent to the stationary contact (3) maintaining the same potential as the stationary contact (3), or the transition arc-extinguishing grids adjacent to the stationary contact (3) being spaced and opposed to the stationary contact (3).

18. The arc extinguishing system according to claim 12, characterized in that: A first arc striking structure (15) is further provided at the connection between the first arc extinguishing chamber (11) and the second arc extinguishing chamber (12), wherein the first arc striking structure (15) is connected between the grid plate groups of the two arc extinguishing chambers. The first arc-striking structure (15) comprises a transition grid group (156), the transition grid group (156) comprising a plurality of transition arc-extinguishing grids arranged at intervals, the transition arc-extinguishing grids being arranged in the first arc-extinguishing cavity (11) and / or the second arc-extinguishing cavity (12), and the transition arc-extinguishing grids adjacent to the stationary contact (3) maintain an equipotential with the stationary contact (3).

19. The arc extinguishing system according to claim 18, characterized in that: One of the transition arc-extinguishing grids serves as a transition connection grid (1561); the middle portion of the transition connection grid (1561) is bent to form a U-shaped structure with a clamping space; the static contact (3) passes through the clamping space and is connected to the transition connection grid (1561).

20. The arc extinguishing system according to claim 13, characterized in that: The static arc-starting angle (14) is in the shape of a plate as a whole. The static arc-starting angle (14) is arranged along one side of the grid group of the second arc-extinguishing chamber (12). The first end of the static arc-starting angle (14) is folded back and connected to the static contact (3). The width of the static arc-starting angle (14) gradually narrows along the direction from the first end to the second end, so that the second end of the static arc-starting angle (14) forms a static sharp corner portion (142).

21. The arc extinguishing system according to claim 12, characterized in that: The static contact (3) is equipotentially connected to a plurality of static arc-strike angles (14), at least one static arc-strike angle (14) extends to the second arc-extinguishing chamber (12), and at least one static arc-strike angle (14) extends to the first arc-extinguishing chamber (11).

22. The arc extinguishing system according to claim 21, characterized in that: The static contact (3) is equipotentially connected with a first static arc-starting angle (1401) and a second static arc-starting angle (1402); the first static arc-starting angle (1401) is located in a first arc-extinguishing chamber (11); the second static arc-starting angle (1402) is located in a second arc-extinguishing chamber (12); and the first static arc-starting angle (1401), the static contact (3) and the second static arc-starting angle (1402) are provided with a through hole for connecting the two arc-extinguishing chambers.

23. The arc extinguishing system according to claim 22, characterized in that: The first static arc-strike angle (1401) is a plate structure, one end of the first static arc-strike angle (1401) is connected to the static contact (3), the other end of the first static arc-strike angle (1401) extends in the first arc-extinguishing chamber (11) and is spaced apart from one end of the grid group of the first arc-extinguishing chamber (11), and a connecting hole (140) is provided in the middle of the first static arc-strike angle (1401); The second static arc-striking angle (1402) comprises a plate-shaped body, a connecting section (14023) is provided in the middle of the plate-shaped body, the connecting section (14023) is connected to the static contact (3), the area between the connecting section (14023) and the two ends of the plate-shaped body is bent at least once, so that the two ends of the plate-shaped body respectively form a first arc-striking section (14021) and a second arc-striking section (14022), the first arc-striking section (14021) is spaced apart from one end of a grid group in the second arc-extinguishing chamber (12), and the second arc-striking section (14022) and a second arc-striking angle (16) arranged in the second arc-extinguishing chamber (12) extend towards each other on the same side of the grid group in the second arc-extinguishing chamber (12).

24. The arc extinguishing system according to claim 13, characterized in that: A second arc striking angle (16) is provided in the second arc extinguishing chamber (12), the second arc striking angle (16) being located at an end away from the static arc striking angle (14), and the grid group in the second arc extinguishing chamber (12) is electrically connected to the moving contact (2) via the second arc striking angle (16); or the arc extinguishing grid at one end of the grid group in the second arc extinguishing chamber (12) away from the static contact (3) is electrically connected to the moving contact (2).

25. The arc extinguishing system according to claim 24, characterized in that: The second arc-striking angle (16) comprises a plate-like body, the middle portion of the plate-like body is bent so that one end of the second arc-striking angle (16) is provided with a shunt portion (161), the shunt portion (161) being used to connect two conductive parts, one of which is connected to the moving contact (2), and the other end of the second arc-striking angle (16) serves as a second arc-striking portion (162).

26. The arc extinguishing system according to claim 25, characterized in that: One end of the second arc striking angle (16) extends in the second arc extinguishing chamber (12) to form an extension plate (163), the extension plate (163) cooperates with the first arc striking angle (151) connected to the static contact (3) at an equipotential, and the distance between the extension plate (163) and the first arc striking angle (151) is less than or equal to the opening distance of the contact system.

27. The arc extinguishing system according to claim 1, characterized in that: Each arc extinguishing chamber is formed by a pair of side plates (17), and a pair of gas producing parts (18) are arranged between each pair of side plates (17), so that the two arc extinguishing chambers form a split structure; or the two arc extinguishing chambers share a pair of side plates (17), and a pair of gas producing parts (18) are arranged between the pair of side plates (17), so that the two arc extinguishing chambers form an integrated structure.

28. A circuit breaker comprising a housing, wherein the housing is provided with an exhaust port, wherein: The arc extinguishing system according to any one of claims 1 to 27 is arranged in the shell, and at least one arc extinguishing chamber is connected to the exhaust port.

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