Arc extinguishing grid plate and arc extinguishing chamber

Abstract

The utility model relates to the technical field of low-voltage switching devices, in particular to an arc extinguishing grid plate and an arc extinguishing chamber. The arc extinguishing grid sheet provided by the utility model comprises a body; the upper end of the body is provided with a first end face and a second end face, and the first end face and the second end face are different in height. The upper end of the body is provided with at least one arc cutting groove located between the first end face and the second end face, and the arc cutting groove penetrates through the two sides of the body in the thickness direction of the body. When the arc extinguishing grid sheets are assembled into a grid sheet group in a positive and negative staggered manner, the first end face and the second end face which are not equal in height can enable the notches of the grid sheet group to be arranged in a front and back staggered manner, the grid sheet group is located below the edges of the two sides of the moving contact of the contact assembly, after the point of the moving contact discharges, the arc can directly correspond to the notches of the arc cutting grooves, and the resistance cut by the body is smaller; the first end face and the second end face which are not equal in height can enable the notches of the grid plate group to be arranged in a front-back staggered mode, cutting and lengthening of electric arcs are facilitated, and the technical effects of improving the electric arc breaking capacity and rapidly extinguishing the arcs can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage switchgear, in particular to an arc-extinguishing grid and an arc-extinguishing chamber. Background Art

[0002] In low-voltage switching electrical appliances, when an arc occurs between contacts, the arc is pulled into the arc-extinguishing grid under the action of the contraction force of the magnetic lines of force, thereby dividing a long arc into multiple short arcs, which plays a role in arc cooling and thus achieves the arc extinguishing effect.

[0003] In the prior art, the structure of arc-quenching grids primarily consists of arc-cutting grooves provided on them, which extinguish the arc. However, in reality, when the arc moves toward the arc-quenching grid, it does not ideally stay in the middle of the contact, but rather deviates to one side. As a result, when the arc enters the arc-quenching grid, it does not enter through the notch of the arc-cutting groove, but instead enters from the flat surfaces on either side of the arc-quenching grid and is then cut by the arc-quenching grid. The resistance to entering the arc-quenching grid is much greater than that from the notch, resulting in poor arc breaking capacity and arc extinguishing efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an arc extinguishing grid and an arc extinguishing chamber to solve the technical problems of poor arc breaking capacity and arc extinguishing efficiency of arc extinguishing grids in the prior art.

[0005] The utility model provides an arc extinguishing grid, comprising: a body;

[0006] The upper end of the body has a first end surface and a second end surface, and the first end surface and the second end surface have different heights;

[0007] The upper end of the body is provided with at least one arc cutting groove located between the first end surface and the second end surface, and along the thickness direction of the body, the arc cutting groove passes through both sides of the body.

[0008] As a further technical solution, the arc cutting grooves are provided at intervals of two, and are respectively the first arc cutting groove and the second arc cutting groove;

[0009] The upper end of the body is further provided with a protrusion located between the first arc cutting groove and the second arc cutting groove, and the protrusion is used to cooperate with the moving contact group so that the protrusion and the projection of the moving contact group in the extension direction at least partially overlap;

[0010] The first end surface is located on a side of the first arc cutting groove away from the second arc cutting groove, and the second end surface is located on a side of the second arc cutting groove away from the first arc cutting groove.

[0011] As a further technical solution, the depth of the first arc cutting groove is different from the depth of the second arc cutting groove.

[0012] As a further technical solution, the depth of the first arc cutting groove is greater than the depth of the second arc cutting groove.

[0013] As a further technical solution, the height of the first end surface is smaller than the height of the second end surface.

[0014] As a further technical solution, the upper end of the protrusion is provided with an inclined surface;

[0015] An end of the inclined surface close to the first arc cutting groove is lower than an end close to the second arc cutting groove.

[0016] As a further technical solution, the body is further provided with a pair of legs;

[0017] The pair of legs are respectively located on the first end surface and the second end surface.

[0018] The utility model provides an arc extinguishing chamber for cooperating with a contact assembly, wherein the arc extinguishing chamber comprises the arc extinguishing grids, and all the arc extinguishing grids are sequentially arranged at intervals to form a grid group;

[0019] The arc extinguishing grid has a front side and a back side, and the front side of at least one arc extinguishing grid in the grid group is opposite to the back side of at least one arc extinguishing grid.

[0020] As a further technical solution, it further includes a pair of fixed side panels arranged opposite to each other;

[0021] The grid plate group is arranged between a pair of the fixed side plates and connected to the fixed side plates.

[0022] As a further technical solution, it further includes a pair of oppositely arranged insulating members, each of the pair of insulating members is located between the pair of fixed side plates, and the pair of insulating members are respectively located on the upper side of the first end surface and the upper side of the second end surface;

[0023] Along the arrangement direction of the arc-extinguishing grids in the grid group, a plurality of protruding teeth are provided on the insulating member, and the protruding teeth are inserted between adjacent arc-extinguishing grids.

[0024] Compared with the existing technology, the arc extinguishing grid and arc extinguishing chamber provided by the present invention have the following technical advantages:

[0025] The arc-extinguishing grid provided by the utility model comprises: a body; the upper end of the body has a first end face and a second end face, and the heights of the first end face and the second end face are different; the upper end of the body is provided with at least one arc-cutting groove located between the first end face and the second end face, and along the thickness direction of the body, the arc-cutting groove passes through both sides of the body.

[0026] Since the upper end of the main body has a first end face and a second end face, and the heights of the first end face and the second end face are different, the main body has arc cutting grooves with unequal heights on the left and right. When the arc extinguishing grids are assembled into a grid group in an alternating manner, the unequal first end face and the second end face can make the grooves of the grid group arranged in a front-to-back staggered manner. The grid group is located below the edges on both sides of the moving contact of the contact assembly. When the tip of the moving contact discharges, the arc can directly correspond to the arc cutting groove, and the resistance to being cut by the main body is smaller. At the same time, the unequal first end face and the second end face can make the grooves of the grid group arranged in a front-to-back staggered manner, which is more conducive to cutting and elongating the arc, thereby achieving the technical effect of improving the arc breaking capacity and quickly extinguishing the arc.

[0027] The arc extinguishing chamber provided by the present invention includes the above-mentioned arc extinguishing grid. Therefore, the technical advantages and effects achieved by the arc extinguishing chamber include the technical advantages and effects achieved by the above-mentioned arc extinguishing grid, which will not be elaborated here.

[0028] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the arc quenching grid structure provided in an embodiment of the present utility model;

[0031] Figure 2 A schematic diagram of the coordination between the arc extinguishing grid and the moving contact group provided in an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the coordination between the arc extinguishing chamber and the moving contact group provided in an embodiment of the present utility model;

[0033] Figure 4 A schematic diagram of the cooperation between the insulating member and the grid assembly provided in an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the grid plate group structure provided in an embodiment of the present utility model.

[0035] Icons: 1-arc-extinguishing grid; 2-body; 3-first end face; 4-second end face; 5-first arc-cutting groove; 6-second arc-cutting groove; 7-moving contact group; 8-raised part; 9-inclined surface; 10-leg; 11-grid group; 12-fixed side plate; 13-insulating part; 14-convex tooth; 15-moving conductive plate; 16-moving contact. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0040] The present invention will be further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0041] The specific structure is as Figures 1 to 5 shown.

[0042] This embodiment provides an arc-extinguishing grid 1, comprising: a body 2;

[0043] The upper end of the body 2 has a first end surface 3 and a second end surface 4, and the first end surface 3 and the second end surface 4 are at different heights;

[0044] The upper end of the body 2 is provided with at least one arc cutting groove located between the first end face 3 and the second end face 4 , and the arc cutting groove passes through both sides of the body 2 along the thickness direction of the body 2 .

[0045] In this embodiment, since the upper end of the main body 2 has a first end face 3 and a second end face 4, and the heights of the first end face 3 and the second end face 4 are different, the main body 2 has arc cutting grooves with unequal heights on the left and right. When the arc extinguishing grids 1 are staggered in front and back to form a grid group 11, the unequal heights of the first end faces 3 and the second end faces 4 can make the grooves of the grid group 11 staggered in the front and back. The grid group 11 is located below the edges on both sides of the moving contact of the contact assembly. When the tip of the moving contact discharges, the arc can directly correspond to the arc cutting groove, and the resistance to being cut by the main body 2 is smaller. At the same time, the unequal heights of the first end faces 3 and the second end faces 4 can make the grooves of the grid group 11 staggered in the front and back, which is more conducive to cutting and elongating the arc, thereby achieving the technical effect of improving the arc breaking capacity and quickly extinguishing the arc.

[0046] In an optional technical solution of this embodiment, two arc cutting grooves are provided at intervals, and they are respectively a first arc cutting groove 5 and a second arc cutting groove 6;

[0047] The upper end of the body 2 is further provided with a raised portion 8 located between the first arc cutting groove 5 and the second arc cutting groove 6, and the raised portion (8) is used to cooperate with the moving contact group (7) so that the raised portion (8) and the projection of the moving contact group (7) in the extension direction at least partially overlap;

[0048] The first end surface 3 is located on a side of the first arc cutting groove 5 away from the second arc cutting groove 6 , and the second end surface 4 is located on a side of the second arc cutting groove 6 away from the first arc cutting groove 5 .

[0049] In this embodiment, the first arc cutting groove 5 and the second arc cutting groove 6 correspond to the two sides of the moving contact of the moving contact group 7 respectively, and the protrusion 8 has an arc cutting function. After an arc is cut by the protrusion 8, an arc of the moving contact enters the corresponding first arc cutting groove 5 or the second arc cutting groove 6, further improving the arc breaking capacity and the rapid arc extinguishing effect.

[0050] This embodiment is not limited thereto, and one or more arc cutting grooves may be provided as long as the requirements are met.

[0051] In an optional technical solution of this embodiment, the upper end of the protrusion 8 is provided with an inclined surface 9;

[0052] An end of the inclined surface 9 close to the first arc cutting groove 5 is lower than an end close to the second arc cutting groove 6 .

[0053] In this embodiment, when the arc extinguishing grids 1 are assembled into a grid group 11 in an alternating manner, the inclined surfaces 9 on the raised portion 8 can form left-right staggered cutting surfaces, which can improve the arc breaking capability and rapid arc extinguishing, and the arc enters the first arc cutting groove 5 and the second arc cutting groove 6 with less resistance.

[0054] In an optional technical solution of this embodiment, the depth of the first arc cutting groove 5 is different from the depth of the second arc cutting groove 6 .

[0055] In this embodiment, since the depth of the first arc cutting groove 5 is different from the depth of the second arc cutting groove 6, when the arc extinguishing grids 1 are assembled into a grid group 11 in an interlaced manner, the first arc cutting groove 5 and the second arc cutting groove 6 of the grid group 11 can be arranged in an interlaced manner in front and back, which is more conducive to cutting the elongated arc and improving the arc extinguishing effect and efficiency.

[0056] Specifically, the depth of the first arc cutting groove 5 is greater than the depth of the second arc cutting groove 6. The height of the first end face 3 is less than the height of the second end face 4. The deeper first arc cutting groove 5 and the shorter first end face 3 are located on the same side, while the shorter second arc cutting groove 6 and the taller second end face 4 are located on the same side. This facilitates manufacturing. Furthermore, when the arc extinguishing grids 1 are staggered and assembled into a grid group 11, this facilitates cutting of an elongated arc, improving arc extinguishing effectiveness and efficiency.

[0057] This embodiment is not limited thereto, and the depth of the first arc cutting groove 5 may be greater than the depth of the second arc cutting groove 6, and the height of the first end face 3 may be greater than the height of the second end face 4; the depth of the first arc cutting groove 5 may be less than the depth of the second arc cutting groove 6, and the height of the first end face 3 may be less than the height of the second end face 4; or the depth of the first arc cutting groove 5 may be less than the depth of the second arc cutting groove 6, and the height of the first end face 3 may be greater than the height of the second end face 4. Any configuration may be used as long as the requirements are met.

[0058] In an optional technical solution of this embodiment, a pair of legs 10 are further provided on the body 2;

[0059] The pair of legs 10 are respectively located on the first end surface 3 and the second end surface 4 .

[0060] In this embodiment, a pair of legs 10 are located on both sides of the moving contact, which can enable the arc generated by the moving contact to enter the arc cutting groove better, thereby improving the arc extinguishing effect.

[0061] The arc extinguishing chamber provided in this embodiment includes the arc extinguishing grid 1 described above. Therefore, the technical advantages and effects achieved by the arc extinguishing chamber include the technical advantages and effects achieved by the arc extinguishing grid 1 described above, which will not be repeated here.

[0062] In this embodiment, the arc extinguishing chamber is used to cooperate with the contact assembly, and the arc extinguishing chamber includes the arc extinguishing grids 1, and all the arc extinguishing grids 1 are sequentially arranged at intervals to form a grid group 11;

[0063] The arc-extinguishing grid 1 has a front side and a back side, and the front side of at least one arc-extinguishing grid 1 in the grid group 11 is opposite to the back side of at least one arc-extinguishing grid 1 .

[0064] Specifically, the contact assembly includes a moving contact group 7 consisting of a moving conductive plate 15 and a moving contact 16, and a stationary contact group consisting of a stationary conductive plate and a stationary contact. The circuit is controlled by the contact or separation between the moving contact 16 and the stationary contact. The grid group 11 is formed by alternating arc-extinguishing grids 1 arranged in a positive and negative orientation, effectively extending the arc.

[0065] In an optional technical solution of this embodiment, a pair of fixed side plates 12 arranged opposite to each other are further included;

[0066] The grid plate group 11 is disposed between a pair of the fixed side plates 12 and connected to the fixed side plates 12 .

[0067] In this embodiment, the left and right sides of each arc-extinguishing grid 1 in the grid group 11 are fixed to the fixed side plates 12 , which has a simple structure, is easy to install, and is stable in fixation.

[0068] In an optional technical solution of this embodiment, a pair of oppositely arranged insulating members 13 are further included, wherein the pair of insulating members 13 are both located between the pair of fixed side plates 12, and the pair of insulating members 13 are respectively located on the upper side of the first end surface 3 and the upper side of the second end surface 4;

[0069] Along the arrangement direction of the arc-extinguishing grids 1 in the grid group 11 , a plurality of protruding teeth 14 are provided on the insulating member 13 , and the protruding teeth 14 are inserted between adjacent arc-extinguishing grids 1 .

[0070] In this embodiment, the insulating member 13 is inserted between adjacent arc-quenching grids 1 through the protruding teeth 14, so that each adjacent arc-quenching grid 1 has the protruding teeth 14 for insulation. At the same time, after the insulating member 13 is installed, the leg portion 10 structure of the arc-quenching grid 1 can be covered to further improve the insulation effect.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arc-extinguishing grid, characterized in that: include: Ontology(2); The upper end of the body (2) has a first end surface (3) and a second end surface (4), and the first end surface (3) and the second end surface (4) have different heights; The upper end of the body (2) is provided with at least one arc cutting groove located between the first end face (3) and the second end face (4), and along the thickness direction of the body (2), the arc cutting groove passes through both sides of the body (2).

2. The arc quenching grid according to claim 1, characterized in that: The arc cutting grooves are provided at intervals of two, and are respectively a first arc cutting groove (5) and a second arc cutting groove (6); The upper end of the body (2) is further provided with a raised portion (8) located between the first arc cutting groove (5) and the second arc cutting groove (6), and the raised portion (8) is used to cooperate with the moving contact group (7) so that the raised portion (8) and the projection of the moving contact group (7) in the extension direction at least partially overlap; The first end surface (3) is located on a side of the first arc cutting groove (5) away from the second arc cutting groove (6), and the second end surface (4) is located on a side of the second arc cutting groove (6) away from the first arc cutting groove (5).

3. The arc quenching grid according to claim 2, characterized in that: The depth of the first arc cutting groove (5) is different from the depth of the second arc cutting groove (6).

4. The arc quenching grid according to claim 3, characterized in that: The depth of the first arc cutting groove (5) is greater than the depth of the second arc cutting groove (6).

5. The arc quenching grid according to claim 4, characterized in that: The height of the first end surface (3) is smaller than the height of the second end surface (4).

6. The arc quenching grid according to any one of claims 2 to 5, characterized in that: The upper end of the protrusion (8) is provided with an inclined surface (9); An end of the inclined surface (9) close to the first arc cutting groove (5) is lower than an end close to the second arc cutting groove (6).

7. The arc quenching grid according to any one of claims 1 to 5, characterized in that: The body (2) is further provided with a pair of legs (10); A pair of legs (10) are respectively located on the first end surface (3) and the second end surface (4).

8. An arc extinguishing chamber for use with a contact assembly, characterized in that: The arc extinguishing chamber comprises a plurality of arc extinguishing grids (1) according to any one of claims 1 to 7, and all of the arc extinguishing grids (1) are sequentially arranged at intervals to form a grid group (11); The arc-extinguishing grid (1) has a front side and a back side, and the front side of at least one arc-extinguishing grid (1) in the grid group (11) is opposite to the back side of at least one arc-extinguishing grid (1).

9. The arc extinguishing chamber according to claim 8, characterized in that: It also includes a pair of fixed side plates (12) arranged opposite to each other; The grid plate group (11) is arranged between a pair of fixed side plates (12) and is connected to the fixed side plates (12).

10. The arc extinguishing chamber according to claim 9, characterized in that: It also includes a pair of oppositely arranged insulating members (13), wherein the pair of insulating members (13) are both located between the pair of fixed side plates (12), and the pair of insulating members (13) are respectively located on the upper side of the first end surface (3) and the upper side of the second end surface (4); Along the arrangement direction of the arc-extinguishing grids (1) in the grid group (11), a plurality of protruding teeth (14) are provided on the insulating member (13), and the protruding teeth (14) are inserted between adjacent arc-extinguishing grids (1).

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